FN Thomson Reuters Web of Science™ VR 1.0 PT J AU CHAROENVIT, Y COLLINS, WE JONES, TR MILLET, P YUAN, L CAMPBELL, GH BEAUDOIN, RL BRODERSON, JR HOFFMAN, SL AF CHAROENVIT, Y COLLINS, WE JONES, TR MILLET, P YUAN, L CAMPBELL, GH BEAUDOIN, RL BRODERSON, JR HOFFMAN, SL TI INABILITY OF MALARIA VACCINE TO INDUCE ANTIBODIES TO A PROTECTIVE EPITOPE WITHIN ITS SEQUENCE SO SCIENCE LA English DT Article ID PLASMODIUM-VIVAX; CIRCUMSPOROZOITE PROTEIN; IMMUNODOMINANT EPITOPE; MONOCLONAL-ANTIBODIES; PEPTIDE-SYNTHESIS; FALCIPARUM; ANTIGEN; SPOROZOITES; INFECTION; EFFICACY AB Saimiri monkeys immunized with a recombinant protein containing 20 copies of the nine amino acid repeat of the Plasmodium vivax circumsporozoite (CS) protein developed high concentrations of antibodies to the repeat sequence and to sporozoites, but were not protected against challenge. After intravenous injection of an immunoglobulin G3 monoclonal antibody (NVS3) against irradiated P. vivax sporozoites, four of six monkeys were protected against sporozoite-induced malaria, and the remaining two animals took significantly longer to become parasitemic. Epitope mapping demonstrated that NVS3 recognizes only four (AGDR) of the nine amino acids within the repeat region of the P. vivax CS protein. The monkeys immunized with (DRA(D)(A)GQPAG)20 did not produce antibodies to the protective epitope AGDR. Thus, determination of the fine specificity of protective immune responses may be critical to the construction of successful subunit vaccines. C1 USN,MED RES INST,DEPT INFECT DIS,BETHESDA,MD 20889. CTR DIS CONTROL,MALARIA BRANCH,ATLANTA,GA 30333. NR 25 TC 78 Z9 78 U1 0 U2 3 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD FEB 8 PY 1991 VL 251 IS 4994 BP 668 EP 671 DI 10.1126/science.1704150 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA EW399 UT WOS:A1991EW39900044 PM 1704150 ER PT J AU SHARMA, J BEARD, BC CHAYKOVSKY, M AF SHARMA, J BEARD, BC CHAYKOVSKY, M TI CORRELATION OF IMPACT SENSITIVITY WITH ELECTRONIC LEVELS AND STRUCTURE OF MOLECULES SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID EXPLOSIVES; SPECTRA AB Explosive impact sensitivity among the homologous series of compounds, TNB to TATB, has been found to demonstrate a linear correlation with shake-up promotion energy. The shake-up transition observed in the N(1s) and O(1s) X-ray photoemission spectra is a direct probe of the energy separation between valence molecular orbitals at the ionized atom. Conversion of the impact energy to thermal initiation is assumed equivalent among this series of compounds due to their structural similarity, thus making the chemical reactivity the determiner of relative explosive sensitivity. TATB analogue compounds demonstrate a shake-up energy/impact sensitivity correlation with a different slope. The change in the slope is attributed to alteration in the physical coupling of impact energy due to differing structure of the analogue compounds. C1 USN,CTR SURFACE WARFARE,MAT EVALUAT BRANCH,10901 NEW HAMPSHIRE AVE,SILVER SPRING,MD 20903. USN,CTR SURFACE WEAP,SYNTH & FORMULAT BRANCH,SILVER SPRING,MD 20910. NR 24 TC 45 Z9 48 U1 3 U2 6 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 FEB 7 PY 1991 VL 95 IS 3 BP 1209 EP 1213 DI 10.1021/j100156a032 PG 5 WC Chemistry, Physical SC Chemistry GA EW478 UT WOS:A1991EW47800032 ER PT J AU STANTON, CT GARLAND, NL NELSON, HH AF STANTON, CT GARLAND, NL NELSON, HH TI TEMPERATURE-DEPENDENCE OF CH(CD)+D2 REACTION-KINETICS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID RATE CONSTANT; CH; MECHANISMS AB The temperature dependence of the rate coefficients for the reactions of ground-state CH and CD + D2 has been measured over the temperature range 298-1260 and 560-1120 K, respectively. The methylidyne radical is generated by laser photolysis at 248 nm of CHBr2Cl for Ch and CDBr3 for CD and detected via laser-induced fluorescence. No pressure dependence over the range 10-100 Torr at room temperature is observed for the CH + D2 reaction. The CH + D2 rate coefficients are fit to the Arrhenius expression k(T) = A exp[-E(a)/RT] and yield k(T) = (4.29 +/- 0.27) X 10(-11) cm3 s-1 exp[(450 +/- 50 cal mol-1)/RT]. The data are fit equally well by k(T) = (1.13 +/- 0.36) X 10(-9) T-(0.45 +/- 0.06). For the reaction CD + D2, a rate expression for the endothermic addition-elimination channel is derived from the measured temperature dependence. The fit expression yields k(abs)(T) = (5.56 +/- 2.82) X 10(-11) cm3 s-1 exp[(-2775 +/- 900 cal mol-1)/RT]. Error limits of the fitted parameters represent 1-sigma-values. The observed negative temperature dependence of the CH + D2 reaction is consistent with recent calculations for CH + H-2 which predict no barrier to CH3 formation along a non-least-motion path. The results of the CD + D2 study indicate the activation energy for addition-elimination is approximately equal to the reaction enthalpy. Above 2100 K the dominant reaction channel is expected to be addition-elimination. C1 USN,RES LAB,DIV CHEM,CODE 6110,WASHINGTON,DC 20375. NR 25 TC 13 Z9 13 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD FEB 7 PY 1991 VL 95 IS 3 BP 1277 EP 1282 DI 10.1021/j100156a045 PG 6 WC Chemistry, Physical SC Chemistry GA EW478 UT WOS:A1991EW47800045 ER PT J AU KLEIN, PB MOORE, FG DIETRICH, HB AF KLEIN, PB MOORE, FG DIETRICH, HB TI PHOTOLUMINESCENCE AND MAGNETIC-RESONANCE STUDIES OF ER3+ IN MEV ION-IMPLANTED GAAS SO APPLIED PHYSICS LETTERS LA English DT Article ID ERBIUM-DOPED GAAS; ELECTROLUMINESCENCE; 1.54-MU-M AB The effects of post-implantation annealing have been studied in MeV Er-implanted GaAs by monitoring the Er3+ electron paramagnetic resonance (EPR) signal as well as the Er3+ and near-band-edge photoluminescence (PL) spectra as a function of the anneal temperature. Er3+ PL is observed from several distinct Er sites in the annealed material. In addition, the observed dependences upon anneal temperature suggest that the Er3+ PL is emitted from centers that are not in the Er3+ state at equilibrium. Absolute EPR measurements of the Er3+ concentration indicate that only a small fraction (< 0.1%) of the Er in the sample is Er3+. RP KLEIN, PB (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 7 TC 28 Z9 28 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 4 PY 1991 VL 58 IS 5 BP 502 EP 504 DI 10.1063/1.104621 PG 3 WC Physics, Applied SC Physics GA EW477 UT WOS:A1991EW47700024 ER PT J AU DAGENAIS, DM BUCHOLTZ, F KOO, KP VOHRA, S POND, JM AF DAGENAIS, DM BUCHOLTZ, F KOO, KP VOHRA, S POND, JM TI DETECTION OF FERROMAGNETIC-RESONANCE IN METALLIC-GLASS BY FIBER INTERFEROMETRIC STRAIN-MEASUREMENT SO APPLIED PHYSICS LETTERS LA English DT Article AB We report the first detection of ferromagnetic resonance in a magnetostrictive amorphous alloy using a fiber interferometer. By measuring the strain at the difference frequency resulting from the application of two rf magnetic fields, we observe a natural (zero field) ferromagnetic resonance near 400 MHz. We discuss novel features of this technique and outline modifications to the existing theory of dynamic magnetostriction suggested by the results. C1 USN,RES LAB,MICROWAVE TECHNOL BRANCH,WASHINGTON,DC 20375. SFA INC,LANDOVER,MD 20785. RP DAGENAIS, DM (reprint author), USN,RES LAB,OPT TECH BRANCH,6570,WASHINGTON,DC 20375, USA. NR 10 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 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD FEB 4 PY 1991 VL 58 IS 5 BP 546 EP 547 DI 10.1063/1.104582 PG 2 WC Physics, Applied SC Physics GA EW477 UT WOS:A1991EW47700039 ER PT J AU BRADY, RF SIKES, AM AF BRADY, RF SIKES, AM TI ANIONIC COPOLYMERIZATION OF BISLACTONE END-CAPPED DIOLS WITH THE DIGLYCIDYL ETHER OF BISPHENOL-A SO MACROMOLECULES LA English DT Article ID POLYMERIZATION AB Aromatic diols are converted to diesters by reaction with 4-carboxy-7,7'-dioxo-2,2'-spirobi-(benzo[c]tetrahydrofuran) in the presence of dicyclohexylcarbodiimide and 4-(dimethylamino)pyridine. Under tertiary amine catalysis, the bislactone groups of these diesters react with commercially pure bisphenol A diglycidyl ether via a multiple ring-opening reaction forming cross-linked polymers with superior thermal properties. The progress of the reaction is followed by infrared spectroscopy, and the mechanism of the ring-opening reaction is determined. Thermal properties of all polymers and the surface properties of fluorine-containing polymers are reported. RP BRADY, RF (reprint author), USN,RES LAB,DIV CHEM,POLYMER MAT BRANCH,WASHINGTON,DC 20375, USA. NR 15 TC 26 Z9 26 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD FEB 4 PY 1991 VL 24 IS 3 BP 688 EP 692 DI 10.1021/ma00003a010 PG 5 WC Polymer Science SC Polymer Science GA EV801 UT WOS:A1991EV80100010 ER PT J AU NEMIROFF, RJ AF NEMIROFF, RJ TI LIMITS ON COMPACT DARK MATTER FROM NULL RESULTS OF SEARCHES FOR LENSING OF QUASI-STELLAR OBJECTS SO PHYSICAL REVIEW LETTERS LA English DT Article ID GRAVITATIONAL LENSES AB Recent searches for multiple quasistellar-object images created by gravitational lensing provide new limits on the density of massive compact objects in the Universe. These limits imply that the cosmological density of compact objects more massive than 10(9.9) M. must be less than closure density, and that the density of compact objects more massive than 10(10.3) M. must be less than 0.25 of the closure density. RP NEMIROFF, RJ (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 4121,4555 OVERLOOK AVE,WASHINGTON,DC 20375, USA. NR 16 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 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD FEB 4 PY 1991 VL 66 IS 5 BP 538 EP 540 DI 10.1103/PhysRevLett.66.538 PG 3 WC Physics, Multidisciplinary SC Physics GA EV897 UT WOS:A1991EV89700005 ER PT J AU MOSTOVYCH, AN KEARNEY, KJ STAMPER, JA SCHMITT, AJ AF MOSTOVYCH, AN KEARNEY, KJ STAMPER, JA SCHMITT, AJ TI MEASUREMENTS OF PLASMA OPACITY FROM LASER-PRODUCED OPTICALLY THIN STRONGLY COUPLED PLASMAS SO PHYSICAL REVIEW LETTERS LA English DT Article ID PURE ELECTRON-PLASMA; INVERSE-BREMSSTRAHLUNG; DENSE; ABSORPTION AB A new technique for producing dense (10(20) cm-3), low-temperature (2-6 eV), optically thin, and well characterized laser-produced plasmas is used to measure, for the first time, the inverse bremsstrahlung absorption and the Coulomb logarithm at 0.5-mu-m in a strongly coupled plasma. Extrapolations of the standard high-frequency calculations of inverse bremsstrahlung absorption underestimate the absorption in this regime by a factor of 2 or more, whereas calculations based on strongly coupled plasma theory and static classical theory agree with the measurements. RP MOSTOVYCH, AN (reprint author), USN,RES LAB,DIV PLASMA PHYS,LASER PLASMA BRANCH,WASHINGTON,DC 20375, USA. NR 23 TC 26 Z9 28 U1 0 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 FEB 4 PY 1991 VL 66 IS 5 BP 612 EP 615 DI 10.1103/PhysRevLett.66.612 PG 4 WC Physics, Multidisciplinary SC Physics GA EV897 UT WOS:A1991EV89700024 ER PT J AU MONASTERO, FC AUSTIN, CF AF MONASTERO, FC AUSTIN, CF TI EVIDENCE OF NORTHWEST-SOUTHEAST DIRECTED COMPRESSION OF LATE CENOZOIC AGE IN THE SUMMIT DIGGINGS, SAN-BERNARDINO COUNTY, CALIFORNIA SO AAPG BULLETIN-AMERICAN ASSOCIATION OF PETROLEUM GEOLOGISTS LA English DT Meeting Abstract C1 USN,CTR WEAP,CHINA LAKE,CA 93555. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ASSN PETROL GEOLOGISTS PI TULSA PA 1444 S BOULDER AVE PO BOX 979, TULSA, OK 74101 SN 0149-1423 J9 AAPG BULL JI AAPG Bull.-Am. Assoc. Petr. Geol. PD FEB PY 1991 VL 75 IS 2 BP 376 EP 376 PG 1 WC Geosciences, Multidisciplinary SC Geology GA EZ450 UT WOS:A1991EZ45000103 ER PT J AU PEELER, DP AF PEELER, DP TI DEPRESSION POST-OFFICE MURALS AND SOUTHERN CULTURE - A GENTLE RECONSTRUCTION - BECKHAM,SB SO AMERICAN HISTORICAL REVIEW LA English DT Book Review RP PEELER, DP (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 1991 VL 96 IS 1 BP 277 EP 278 DI 10.2307/2164237 PG 2 WC History SC History GA EZ341 UT WOS:A1991EZ34100225 ER PT J AU PEELER, DP AF PEELER, DP TI MINDS EYE, MINDS TRUTH - FSA PHOTOGRAPHY RECONSIDERED - CURTIS,J SO AMERICAN HISTORICAL REVIEW LA English DT Book Review RP PEELER, DP (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 1991 VL 96 IS 1 BP 278 EP 279 DI 10.2307/2164238 PG 2 WC History SC History GA EZ341 UT WOS:A1991EZ34100226 ER PT J AU CRUTCHER, JM LAMM, SH HALL, TA AF CRUTCHER, JM LAMM, SH HALL, TA TI PROCEDURES TO PROTECT HEALTH-CARE WORKERS FROM HIV-INFECTION - CATEGORY-I (HEALTH-CARE) WORKERS SO AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL LA English DT Article C1 CONSULTANTS EPIDEMIOL & OCCUPAT HLTH INC,WASHINGTON,DC 20007. RP CRUTCHER, JM (reprint author), USN,ENVIRONM & PREVENT MED UNIT 6,BOX 112,HONOLULU,HI 96860, USA. NR 12 TC 4 Z9 4 U1 0 U2 0 PU AMER INDUSTRIAL HYGIENE ASSOC PI FAIRFAX PA 2700 PROSPERITY AVE #250, FAIRFAX, VA 22031-4307 SN 0002-8894 J9 AM IND HYG ASSOC J JI Am. Ind. Hyg. Assoc. J. PD FEB PY 1991 VL 52 IS 2 BP A100 EP A103 PG 4 WC Environmental Sciences; Public, Environmental & Occupational Health SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health GA EW755 UT WOS:A1991EW75500010 PM 1849338 ER PT J AU LAMM, SH BREWER, TF CRUTCHER, JM AF LAMM, SH BREWER, TF CRUTCHER, JM TI AIDS IN THE WORKPLACE - A SUMMARY OF RISKS AND RESPONSES SO AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL LA English DT Article ID INFECTION C1 JOHNS HOPKINS UNIV,BALTIMORE,MD 21205. USN,ENVIRONM & PREVENT MED UNIT 6,HONOLULU,HI 96860. RP LAMM, SH (reprint author), CONSULTANTS EPIDEMIOLOGY & OCCUPAT HLTH INC,2428 WISCONSIN AVE,WASHINGTON,DC 20007, USA. NR 13 TC 1 Z9 1 U1 0 U2 0 PU AMER INDUSTRIAL HYGIENE ASSOC PI FAIRFAX PA 2700 PROSPERITY AVE #250, FAIRFAX, VA 22031-4307 SN 0002-8894 J9 AM IND HYG ASSOC J JI Am. Ind. Hyg. Assoc. J. PD FEB PY 1991 VL 52 IS 2 BP A112 EP A115 PG 4 WC Environmental Sciences; Public, Environmental & Occupational Health SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health GA EW755 UT WOS:A1991EW75500013 PM 1849339 ER PT J AU MCCAFFREY, FM BRADEN, DS STRONG, WB AF MCCAFFREY, FM BRADEN, DS STRONG, WB TI SUDDEN CARDIAC DEATH IN YOUNG ATHLETES - A REVIEW SO AMERICAN JOURNAL OF DISEASES OF CHILDREN LA English DT Review ID MITRAL-VALVE PROLAPSE; HYPERTROPHIC CARDIOMYOPATHY; CORONARY-ARTERY; KAWASAKI DISEASE; FOLLOW-UP; PATHOLOGIC FEATURES; SUBAORTIC STENOSIS; CONDUCTION SYSTEM; MARFANS-SYNDROME; CHILDREN C1 USN HOSP,DIV PEDIAT CARDIOL,PORTSMOUTH,VA. RP MCCAFFREY, FM (reprint author), MED COLL GEORGIA,DEPT PEDIAT,PEDIAT CARDIOL SECT,1120 15TH ST,AUGUSTA,GA 30912, USA. NR 89 TC 58 Z9 60 U1 0 U2 1 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 1991 VL 145 IS 2 BP 177 EP 183 PG 7 WC Pediatrics SC Pediatrics GA EX226 UT WOS:A1991EX22600016 PM 1994683 ER PT J AU GOLDMAN, G WELBOURN, R KLAUSNER, JM KOBZIK, L VALERI, CR SHEPRO, D HECHTMAN, HB AF GOLDMAN, G WELBOURN, R KLAUSNER, JM KOBZIK, L VALERI, CR SHEPRO, D HECHTMAN, HB TI INTRAVASCULAR CHEMOATTRACTANTS INHIBIT DIAPEDESIS BY SELECTIVE RECEPTOR OCCUPANCY SO AMERICAN JOURNAL OF PHYSIOLOGY LA English DT Article DE DESENSITIZATION; CHEMOTAXIS; LEUKOTRIENE; THROMBOXANE; ZYMOSAN-ACTIVATED PLASMA ID ADHESION; NEUTROPHILS; ACTIVATION; MAC-1; LFA-1; DESENSITIZATION; GLYCOPROTEIN; TRANSDUCTION; STIMULATION; CIRCULATION AB An extravascular chemoattractant leads to migration of polymorphonuclear neutrophils (PMN) to that site, whereas intravascular administration leads to PMN oxidative activity and sequestration in microvessels but no diapedesis. This study examines the inhibitory role of intravascular chemoattractants. Rabbits (n = 37) were pretreated with zymosan-activated plasma (ZAP), leukotriene (LT) B4, or thromboxane (Tx) mimic. These agents were given intra-arterially, topically into plastic chambers taped atop sites of dermabrasion on the back, or into a lobar bronchus (n = 35). Intra-arterial injection of each chemoattractant resulted, 10 min later, in a 29-42% increase in intracellular PMN H2O2. In saline-infused animals, topical administration of the chemoattractants into dermabrasion chambers resulted in PMN accumulation per cubic millimeter after 3 h of 600 with ZAP, 536 with LTB4, and 643 with Tx mimic; all values higher than 46 with saline and 63 with normal plasma (all P < 0.05). In other saline-infused animals, lobar lung aspiration of chemoattractants led to diapedesis as measured in bronchoalveolar lavage (BAL) fluid (PMN x 10(4)/ml) after 3 h: 19.0 with ZAP, 11.2 with LTB4 and 14.5 with Tx mimic, all greater than aspiration with saline or normal plasma 4.0 and 4.9, respectively (all P < 0.05). Intra-arterial chemotactic administration inhibited subsequent PMN diapedesis in response to that same chemoattractant, both in dermabrasion chambers and in BAL fluid. When different intra- and extra-vascular chemoattractants were used diapedesis was promoted. Thus Tx infused intra-arterially and ZAP applied to a blister or lobar bronchus led to rapid cell migration and increased cell numbers. Intra-arterial infusion of a Tx receptor antagonist abolished diapedesis in response in Tx mimic and LTB4 but only moderately affected ZAP-induced diapedesis. These data indicate that intravascular chemoattractants increase neutrophil oxidative activity, an event unrelated to moderation of subsequent diapedesis. The moderating effect on diapedesis is consistent with alteration of a chemotactic gradient across specific PMN receptors. C1 BRIGHAM & WOMENS HOSP,DEPT SURG,15 FRANCES ST,BOSTON,MA 02115. BRIGHAM & WOMENS HOSP,DEPT PATHOL,BOSTON,MA 02115. HARVARD UNIV,SCH MED,BOSTON,MA 02115. USN,BLOOD RES LAB,BOSTON,MA 02115. BOSTON UNIV,CTR BIOL SCI,BOSTON,MA 02215. FU NHLBI NIH HHS [HL-16714-13]; NIGMS NIH HHS [GM-35141-03, GM-24891-11] NR 27 TC 6 Z9 6 U1 0 U2 0 PU AMER PHYSIOLOGICAL SOC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0002-9513 J9 AM J PHYSIOL JI Am. J. Physiol. PD FEB PY 1991 VL 260 IS 2 BP H465 EP H472 PN 2 PG 8 WC Physiology SC Physiology GA EY856 UT WOS:A1991EY85600020 PM 1847598 ER PT J AU STANLEY, MD HULL, JE AF STANLEY, MD HULL, JE TI REACTION TO INTRATHECAL IOHEXOL SO AMERICAN JOURNAL OF ROENTGENOLOGY LA English DT Letter RP STANLEY, MD (reprint author), USN HOSP,SAN DIEGO,CA 92134, USA. RI HULL, JEFFREY/N-3100-2013 OI HULL, JEFFREY/0000-0003-4094-5810 NR 1 TC 1 Z9 1 U1 0 U2 0 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 FEB PY 1991 VL 156 IS 2 BP 403 EP 403 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA EU535 UT WOS:A1991EU53500035 PM 1898825 ER PT J AU BAIRD, JK JONES, TR PURNOMO MASBAR, S RATIWAYANTO, S LEKSANA, B AF BAIRD, JK JONES, TR PURNOMO MASBAR, S RATIWAYANTO, S LEKSANA, B TI EVIDENCE FOR SPECIFIC SUPPRESSION OF GAMETOCYTEMIA BY PLASMODIUM-FALCIPARUM IN RESIDENTS OF HYPERENDEMIC IRIAN JAYA SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article ID HUMAN-POPULATIONS; INFECTIVITY; MALARIA AB An epidemiologic study of hyperendemic malaria in Arso PIR, a village in northeastern Irian Jaya (Indonesian New Guinea), revealed evidence suggesting suppression of gametocytemia independent of immune control of the asexual parasitemia. A total of 240 people, representing ages between 2 and 60 years, were followed by biweekly blood film examination for 16 weeks beginning in November 1987. Two distinct subpopulations were represented-1) life-long residents of Irian Jaya, and 2) transmigrants from Java who arrived in Irian Jaya 20 months before the surveillance effort began. Twenty-five percent of blood films from natives and 31% from Javanese were positive for falciparum malaria; of these, the rate of gametocytemia was 21% for natives, and 42% for the Javanese transmigrants (P < 0.001). This difference could not be explained by differences in the frequency or grade of parasitemia, illness, or by known patterns of antimalarial consumption. Similarly, in Wor, a village near Arso PIR, the gametocyte rate for P. falciparum diminished from 83% to 25% in transmigrants from Java between their eleventh and twenty-fifth month of residence in Irian Jaya, a period during which the falciparum malaria rate remained stable between 30% and 50%. An immunofluorescent antibody test using whole, acetone-fixed gametocytes as substrate revealed correlation between antibody titer and protection from gametocytemia among the semi-immune natives of Arso PIR, but not among the Javanese. Specific immune suppression of gametocytes, independent of immune control of asexual parasites, can explain all of these observations. C1 USN,MED RES UNIT 2,APO,SAN FRANCISCO,CA 96356. USN,INST MED RES,NMC,NCR,BETHESDA,MD 20814. RP BAIRD, JK (reprint author), TULANE UNIV,MED CTR,SCH PUBL HLTH & TROP MED,DEPT TROP MED,1501 CANAL ST,NEW ORLEANS,LA 70112, USA. NR 15 TC 35 Z9 35 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 FEB PY 1991 VL 44 IS 2 BP 183 EP 190 PG 8 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA FF797 UT WOS:A1991FF79700011 PM 2012262 ER PT J AU STERNBERG, TL BAILEY, MK LAZARCHICK, J BRAHEN, NH AF STERNBERG, TL BAILEY, MK LAZARCHICK, J BRAHEN, NH TI PROTEIN-C DEFICIENCY AS A CAUSE OF PULMONARY-EMBOLISM IN THE PERIOPERATIVE PERIOD SO ANESTHESIOLOGY LA English DT Article DE COAGULATION; COMPLICATION-PULMONARY EMBOLISM; PROTEIN-PROTEIN-C C1 MED UNIV S CAROLINA,DEPT PATHOL & LAB MED,HEMATOL SECT,CHARLESTON,SC 29425. MED UNIV S CAROLINA,USN,MED CORPS,CHARLESTON,SC 29425. RP STERNBERG, TL (reprint author), MED UNIV S CAROLINA,DEPT ANESTHESIOL,171 ASHLEY AVE,CHARLESTON,SC 29425, USA. NR 13 TC 5 Z9 7 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0003-3022 J9 ANESTHESIOLOGY JI Anesthesiology PD FEB PY 1991 VL 74 IS 2 BP 364 EP 366 DI 10.1097/00000542-199102000-00025 PG 3 WC Anesthesiology SC Anesthesiology GA EV645 UT WOS:A1991EV64500025 PM 1990911 ER PT J AU SEARLES, SK HART, GA DOWLING, JA HANLEY, ST AF SEARLES, SK HART, GA DOWLING, JA HANLEY, ST TI LASER-BEAM PROPAGATION IN TURBULENT CONDITIONS SO APPLIED OPTICS LA English DT Article DE LASER BEAM PROPAGATION; ATMOSPHERIC TURBULENCE AB Diffraction-limited low power laser beams at 1.06 and 3.8-mu-m were focused by a 91-cm diam aperture onto a receiver located 10.5 km away on a low slant angle path over a desert basin. The analysis of beam areas and turbulence levels was used to determine a new scaling law for tilt-corrected turbulence-induced beam spread. C1 WJ SCHAFER ASSOC INC,CHELMSFORD,MA 01824. NEW TEK PRECIS OPT CORP,BELLCAMP,MD 21017. UNITED TECHNOL OPT SYST,WHITE SANDS MISSILE RANGE,NM 88002. RP SEARLES, SK (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 13 TC 5 Z9 6 U1 1 U2 2 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD FEB 1 PY 1991 VL 30 IS 4 BP 401 EP 406 PG 6 WC Optics SC Optics GA EW644 UT WOS:A1991EW64400015 PM 20582005 ER PT J AU OLSZEWSKI, EW SCHOMMER, RA SUNTZEFF, NB HARRIS, HC AF OLSZEWSKI, EW SCHOMMER, RA SUNTZEFF, NB HARRIS, HC TI SPECTROSCOPY OF GIANTS IN LMC CLUSTERS .1. VELOCITIES, ABUNDANCES, AND THE AGE METALLICITY RELATION SO ASTRONOMICAL JOURNAL LA English DT Article ID LARGE MAGELLANIC CLOUD; GLOBULAR-CLUSTERS; CCD PHOTOMETRY; STAR-CLUSTERS; RADIAL-VELOCITIES; FAINT STAR; CEPHEIDS; DISTANCE; NGC-2257; GALAXY AB We report velocities and equivalent widths derived from spectra taken at the calcium triplet (lambda approximately 8500 angstrom) for more than 150 stars in approximately 80 different LMC star clusters. Velocities of the individual program stars are accurate to 5 km s-1. The sum of the pseudo-equivalent widths of the three calcium lines are compared with those of Galactic calibrators; these measures provide a sensitive abundance indicator for -2.3 < [Fe/H] < 0.0, with an accuracy of +/- 0.2 dex per observation. Although the majority of the program cluster are younger than the calibrating Galactric cluster we argue that the derived abundances are not strongly affected by ignoring differences in surface gravity. Abundances are derived for 70 clusters, most of which have no previous spectroscopic metallicity determinations. These abundances are combined with ages of 31 clusters derived from color-magnitude diagrams, and are used to construct the age-metallicity relation for the inner (radius < 5-degrees-C), and outer (radius > 5-degrees-C) parts of the LMC. This relationship can be characterized by a simple one-zone enrichment model, although much of the early enrichment history of the LMC is hidden by the lack of clusters with ages between 3 and 10 Gyr. The abundances for the inner and outer clusters at an age of 2 Gyr are nearly identical ( -0.3 and -0.42, respectively), and therefore little radial abundance gradient is evident in the cluster system. C1 UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721. ASSOC UNIV RES ASTRON,CERRO TOLOLO INTERAMER OBSERV,LA SERENA,CHILE. USN OBSERV,FLAGSTAFF,AZ 86002. NR 90 TC 251 Z9 250 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 FEB PY 1991 VL 101 IS 2 BP 515 EP & DI 10.1086/115701 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EU739 UT WOS:A1991EU73900013 ER PT J AU WALKER, RL CHAMBLISS, CR AF WALKER, RL CHAMBLISS, CR TI AY VULPECULAE, OBSERVATIONS AND ANALYSIS OF A BINARY WITH AN UNDERMASSIVE SECONDARY SO ASTRONOMICAL JOURNAL LA English DT Article ID LIGHT CURVES; SYSTEM AB AY Vulpeculae is an Algol-type eclipsing binary with P = 2.4124 days, and V = 11.70 at maximum light. The primary eclipse is very deep (2.2 mag), which makes the system of special interest. Complete light curves in UBV were obtained in 1986 using the 1.0 m reflector at the USNO Flagstaff Station. A revised ephemeris is presented which shows that the period has increased slightly over the past few decades. The light curves were analyzed using both the WINK method and the SIMPLEX algorithm. AY Vulpeculae is a semidetached system with the secondary filling its Roche lobe. The values derived for r1, r2, and the mass ratio (q) are 0.24, 0.26, and 0.24, respectively. The primary component has the characteristics of a subgiant of spectral class F0, while the secondary is a K-type subgiant and is decidedly undermassive. C1 KUTZTOWN STATE UNIV,KUTZTOWN,PA 19530. RP WALKER, RL (reprint author), USN OBSERV,FIAGSTAFF STN,POB 1149,FLAGSTAFF,AZ 86002, USA. NR 24 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 0004-6256 J9 ASTRON J JI Astron. J. PD FEB PY 1991 VL 101 IS 2 BP 616 EP 624 DI 10.1086/115710 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EU739 UT WOS:A1991EU73900022 ER PT J AU HARRIS, HC BAUM, WA HUNTER, DA KREIDL, TJ AF HARRIS, HC BAUM, WA HUNTER, DA KREIDL, TJ TI PHOTOMETRIC CALIBRATION OF THE HST WIDE-FIELD PLANETARY CAMERA .1. GROUND-BASED OBSERVATIONS OF STANDARD STARS SO ASTRONOMICAL JOURNAL LA English DT Article ID SYSTEMS; COLORS AB This paper describes the observation and analysis of field stars, undertaken as a step toward understanding the photometric properties of the filters and CCDs aboard the Wide-Field/Planetary Camera of the Hubble Space Telescope. Ground-based CCD observations have been made simulating 15 of the most important WF/PC passbands. Data are presented here for an equatorial network of stars including many UBVRI standards and some spectrophotometric standards. They serve to establish a photometric system that will be used in the calibration of in-flight data and that is useful for the calibration of other ground-based data. Transformations between WF/PC and other photometric systems are discussed, as well as the effects of interstellar absorption and atmospheric extinction on data in the WF/PC system. Synthetic photometry has been used as an aid in the data analysis and is described. C1 USN OBSERV,FLAGSTAFF,AZ 86002. RP HARRIS, HC (reprint author), LOWELL OBSERV,1400 W MARS HILL RD,FLAGSTAFF,AZ 86001, USA. NR 17 TC 77 Z9 77 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 FEB PY 1991 VL 101 IS 2 BP 677 EP 694 DI 10.1086/115715 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EU739 UT WOS:A1991EU73900027 ER PT J AU NEDOLUHA, GE WATSON, WD AF NEDOLUHA, GE WATSON, WD TI SPECTRAL-LINE PROFILES AND LUMINOSITIES OF ASTROPHYSICAL WATER MASERS SO ASTROPHYSICAL JOURNAL LA English DT Article DE LINE PROFILES; MASERS ID MAGNETIC-FIELDS; PROPER MOTIONS; H2O MASERS; DISTANCES; ORION AB The spectral line narrowing and rebroadening that occurs for astrophysical masers as a function of the emergent radiative flux is calculated for the prominent, 22 GHz masing transition of water. Hyperfine structure and cross-relaxation are treated explicitly. The increased line breadths due to hyperfine structure lead to reliable, essentially model-independent upper limits to the emergent flux that tend to be lower than other estimates for these masers. For many 22 GHz masers including the outbursts in W49 and Orion which have the highest reported brightness temperatures greater-than-or-similar-to 10(15) K), the observed line breadths are less than 0.8 km s-1 (FWHM). For these, the upper limit to the emergent maser flux is T(b)-DELTA-OMEGA equal-to-or-less-than 10(10) K sr when expressed in terms of the brightness temperature T(b) and the solid angle DELTA-OMEGA for beaming. As a result, the long-standing puzzle of the extreme brightness of the interstellar water masers is largely resolved. Their brightness is due to a high degree of beaming (DELTA-OMEGA less-than-or-similar-to 10(-5) sr in some cases) and not to more effective pumping. The actual maser luminosities are smaller by factors of 100 than those of certain previous assessments. Information concerning the spectral line profiles and luminosities also bears on efforts to understand the relationship between the recently discovered water masers at millimeter and submillimeter wavelengths and the 22 GHz masers. Inferences about the strength of the magnetic field in star-forming regions based on the observed circular polarization of the 22 GHz masers are influenced, as well, by results here-by the upper limits to the radiative flux and by the conclusion that a single hyperfine component ordinarily is not dominant. C1 UNIV ILLINOIS,DEPT PHYS & ASTRON,URBANA,IL 61801. RP NEDOLUHA, GE (reprint author), USN,RES LAB,CODE 4030,WASHINGTON,DC 20375, USA. NR 28 TC 50 Z9 50 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 1 PY 1991 VL 367 IS 2 BP L63 EP L67 DI 10.1086/185932 PN 2 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA ET684 UT WOS:A1991ET68400006 ER PT J AU REED, HL KOWALSKI, KR DALESANDRO, MM ROBERTSON, R LEWIS, SB AF REED, HL KOWALSKI, KR DALESANDRO, MM ROBERTSON, R LEWIS, SB TI PROPRANOLOL FAILS TO LOWER THE INCREASED BLOOD-PRESSURE CAUSED BY COLD AIR EXPOSURE SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID PLASMA-CATECHOLAMINES; HYPERTENSION; RESPONSES; EXERCISE; HEART AB Cold air exposure stimulates a rise in mean arterial blood pressure (MAP) and plasma norepinephrine (NE). The specific contribution of the beta-adrenergic receptor to this pressor response is unknown. Therefore, we pretreated 12 normal men with placebo or a bradycardia-inducing amount of propranolol prior to exposing them to either 25-degrees-C or 4-degrees-C air. At 25-degrees-C, propranolol pretreatment lowered heart rate (HR) and MAP. When we compared changes in MAP after their respective 30-min exposure at 25-degrees-C and 4-degrees-C, the cold elevated MAP by 18.4 +/- 1.5 mm Hg in subjects pretreated with propranolol comapred with 13.0 +/- 2.5 mm Hg in subject pretreated with placebo. Fingertip skin temperature (T(fing)) measured at 4-degrees-C, 9.5 +/- 0.8-degrees-C in propranolol-pretreated subjects was lower than the 11.1 +/- 0.7-degrees-C with that of placebo. Plasma NE increased equally during cold exposure with both placebo and propranolol pretreatment. We conclude that the beta receptor plays a minor role in generating the pressor response to cold air. Therefore, the effectiveness of actue administrations of propranolol for maintaining normotension in subjects exposed to cold environments may be attenuated. RP REED, HL (reprint author), USN,MED RES INST,DEPT ENVIRONM MED,DIV BIOCHEM,MAIL STOP 11,BETHESDA,MD 20814, USA. NR 22 TC 7 Z9 7 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 FEB PY 1991 VL 62 IS 2 BP 111 EP 115 PG 5 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA EV191 UT WOS:A1991EV19100003 PM 1848072 ER PT J AU BOHNKER, B ANZALONE, F MITTELMAN, M MARKOVITS, A AF BOHNKER, B ANZALONE, F MITTELMAN, M MARKOVITS, A TI PRIMARY FLIGHT TRAINING PERFORMANCE OF STUDENT NAVAL AVIATORS WITH VISION WAIVERS SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID ACCIDENT EXPERIENCE; PILOTS; AIRMEN AB Performance was studied for student naval aviators with waivers for defective uncorrected distance visual acuity who underwent primary flight training at NAS Whiting Field, FL, for fiscal year 1987 (cases = 45). Outcome variables were completion rate, primary flight training grades and flight hours. Controls for completion rate were all other students during that period (N = 1443). For training grades and hours, controls were selected who completed the same training squadron within 1 month of the case. Two controls were selected who progressed to the jet pipeline, with two additional controls selected who progressed to the same pipeline as the cases, either maritime/patrol or helicopter (controls = 180). Results demonstrated the cases were significantly more likely to complete training (p = 0.029), but not significantly different in primary flight grades or hours. These results suggest student naval aviators on vision waivers were competitive with their contemporaries. C1 USN,INST AEROSP MED,DEPT OPHTHALMOL,CODE 02 NAS,PENSACOLA,FL 32508. NR 11 TC 3 Z9 3 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 FEB PY 1991 VL 62 IS 2 BP 162 EP 164 PG 3 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA EV191 UT WOS:A1991EV19100012 PM 2001214 ER PT J AU WIEDER, R CORNETTA, K KESSLER, SW ANDERSON, WF AF WIEDER, R CORNETTA, K KESSLER, SW ANDERSON, WF TI INCREASED EFFICIENCY OF RETROVIRAL-MEDIATED GENE-TRANSFER AND EXPRESSION IN PRIMATE BONE-MARROW PROGENITORS AFTER 5-FLUOROURACIL INDUCED HEMATOPOIETIC SUPPRESSION AND RECOVERY SO BLOOD LA English DT Article ID HUMAN ADENOSINE-DEAMINASE; COLONY-FORMING CELLS; STEM-CELLS; ANTIGEN EXPRESSION; GENERATION-AGE; DNA-SYNTHESIS; W/WV MICE; VIRAL-DNA; MOUSE; VIRUS C1 NHLBI,MOLEC HEMATOL BRANCH,BLDG 10,ROOM 7D18,BETHESDA,MD 20892. USN,MED RES INST,DEPT IMMUNOBIOL & TRANSPLANTAT,BETHESDA,MD 20814. NR 46 TC 28 Z9 28 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD FEB 1 PY 1991 VL 77 IS 3 BP 448 EP 455 PG 8 WC Hematology SC Hematology GA EV332 UT WOS:A1991EV33200004 PM 1846760 ER PT J AU NEUBAUER, A SHANNON, K LIU, E AF NEUBAUER, A SHANNON, K LIU, E TI MUTATIONS OF THE RAS PROTOONCOGENES IN CHILDHOOD MONOSOMY-7 SO BLOOD LA English DT Article ID ACUTE MYELOID-LEUKEMIA; BONE-MARROW TRANSPLANTATION; MYELODYSPLASTIC SYNDROMES; GENE-MUTATIONS; DISORDER; CODON-13 C1 UNIV N CAROLINA,LINEBERGER CANC RES CTR,DIV HEMATOL & ONCOL,CB 7295,CHAPEL HILL,NC 27599. UNIV N CAROLINA,CURRICULUM GENET,DIV HEMATOL & ONCOL,CHAPEL HILL,NC 27514. USN HOSP,OAKLAND,CA. UNIV CALIF SAN FRANCISCO,DEPT PEDIAT,SAN FRANCISCO,CA 94143. RI Liu, Edison/C-4141-2008 FU NCI NIH HHS [R01-CA49240] NR 30 TC 52 Z9 54 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD FEB 1 PY 1991 VL 77 IS 3 BP 594 EP 598 PG 5 WC Hematology SC Hematology GA EV332 UT WOS:A1991EV33200023 PM 1991170 ER PT J AU WELLER, RA DONELAN, MA BRISCOE, MG HUANG, NE AF WELLER, RA DONELAN, MA BRISCOE, MG HUANG, NE TI RIDING THE CREST - A TALE OF 2 WAVE EXPERIMENTS SO BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY LA English DT Article ID SURFACE GRAVITY-WAVES; ENERGY-SPECTRA; PHYSICAL BASIS; CONTOUR RADAR; OCEAN; WIND; SPECTROMETER; VELOCITY; PRESSURE; LAYER AB This paper gives a general overview of two ocean wave experiments. The experimental goals of the Surface Wave Processes Program (SWAPP) and of the Surface Wave Dynamics Experiment (SWADE) are quite different but complementary. In general terms, SWAPP is focused on local processes: principally wave breaking, upper mixed layer dynamics, and microwave and acoustic signatures of wave breaking. SWADE, on the other hand, is concerned primarily with the evolution of the directional wave spectrum in both time and space, improved understanding of wind forcing and wave dissipation, the effect of waves on the air-sea coupling mechanisms, and the radar response of the surface. Both programs acknowledge that wave dissipation is the weakest link in our understanding of wave evolution on the ocean. SWAPP takes a closer look at wave dissipation processes directly, while SWADE, with the use of fully non-linear (third generation) wave models and carefully measured wind forcing, provides an opportunity to study the effect of dissipation on spectral evolution. Both programs involve many research platforms festooned with instruments and large teams of scientists and engineers gathering and analyzing huge datasets. The success of SWAPP and SWADE will be measured in the degree to which the results can be integrated into a far more complete picture than we have had heretofore of interfacial physics, wave evolution, and mixed layer dynamics. C1 ENVIRONM CANADA,CANADA CTR INLAND WATERS,NATL WATER RES INST,BURLINGTON L7R 4A6,ONTARIO,CANADA. OFF NAVAL RES,ARLINGTON,VA 22217. NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. RP WELLER, RA (reprint author), WOODS HOLE OCEANOG INST,WOODS HOLE,MA 02543, USA. NR 29 TC 39 Z9 39 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 FEB PY 1991 VL 72 IS 2 BP 163 EP 183 DI 10.1175/1520-0477(1991)072<0163:RTCATO>2.0.CO;2 PG 21 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA FC269 UT WOS:A1991FC26900001 ER PT J AU LAL, RB HEIBA, IM DHAWAN, RR SMITH, ES PERINE, PL AF LAL, RB HEIBA, IM DHAWAN, RR SMITH, ES PERINE, PL TI IGG SUBCLASS RESPONSES TO HUMAN IMMUNODEFICIENCY VIRUS-1 ANTIGENS - LACK OF IGG2 RESPONSE TO GP41 CORRELATES WITH CLINICAL MANIFESTATION OF DISEASE SO CLINICAL IMMUNOLOGY AND IMMUNOPATHOLOGY LA English DT Article ID ENVELOPE GLYCOPROTEIN; ANTIBODY-RESPONSE; HIV-INFECTION; CARBOHYDRATE; AIDS; LYMPHADENOPATHY; RESTRICTION; IMMUNOLOGY C1 UNIFORMED SERV UNIV HLTH SCI,DIV TROP PUBL HLTH,BETHESDA,MD 20814. USN,HOSP MED,DIV INFECT DIS,BETHESDA,MD 20814. NR 30 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 0090-1229 J9 CLIN IMMUNOL IMMUNOP JI Clin. Immunol. Immunopathol. PD FEB PY 1991 VL 58 IS 2 BP 267 EP 277 DI 10.1016/0090-1229(91)90141-V PG 11 WC Immunology; Pathology SC Immunology; Pathology GA EU251 UT WOS:A1991EU25100008 PM 1985797 ER PT J AU MOWREY, RC KOURI, DJ AF MOWREY, RC KOURI, DJ TI INELASTIC MOLECULE-CORRUGATED SURFACE SCATTERING USING THE CLOSE-COUPLING WAVE-PACKET METHOD SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article ID DEPENDENT SCHRODINGER-EQUATION AB A computer program for calculating transition probabilities for rotationally and translationally inelastic scattering of homonuclear diatomic molecules from static, corrugated surfaces is described. The program uses an exact quantum-mechanical method which combines a close-coupling expansion of the internal states with a time-dependent wave-packet description of the center-of-mass motion. The wave function is propagated in time using an expansion of the time-evolution operator in a series of Chebyshev polynomials. C1 UNIV HOUSTON,DEPT CHEM,HOUSTON,TX 77204. UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204. RP MOWREY, RC (reprint author), USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375, USA. NR 9 TC 11 Z9 11 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD FEB PY 1991 VL 63 IS 1-3 BP 100 EP 114 DI 10.1016/0010-4655(91)90242-D PG 15 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA FF110 UT WOS:A1991FF11000012 ER PT J AU MEZEBISH, DS YEAGER, JK VIDMAR, DA AF MEZEBISH, DS YEAGER, JK VIDMAR, DA TI TUBERCULOID LEPROSY - A CASE-REPORT SO CUTIS LA English DT Article AB A case of tuberculoid leprosy, undiagnosed and consequently untreated for four years, is presented. This case report is presented in an attempt to alert the clinician to the occurrence of leprosy in the American population and to raise the index of suspicion in the proper clinical setting. C1 NATL NAVAL MED CTR, DEPT DERMATOL, BETHESDA, MD 20814 USA. RP MEZEBISH, DS (reprint author), USN HOSP, SAN DIEGO, CA 92134 USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU EXCERPTA MEDICA INC PI NEW YORK PA 245 WEST 17TH STREET, NEW YORK, NY 10011 SN 0011-4162 J9 CUTIS JI Cutis PD FEB PY 1991 VL 47 IS 2 BP 116 EP 118 PG 3 WC Dermatology SC Dermatology GA EW771 UT WOS:A1991EW77100008 PM 2001631 ER PT J AU FLEMING, B AF FLEMING, B TI PARADOX ON THE PACIFIC + DANCE AND THEATER AT THE 1990 LOS-ANGELES FESTIVAL SO DANCE MAGAZINE LA English DT Note RP FLEMING, B (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU DANCE MAGAZINE INC PI NEW YORK PA 33 WEST 60TH ST, NEW YORK, NY 10023 SN 0011-6009 J9 DANCE MAG JI Dance Mag. PD FEB PY 1991 VL 65 IS 2 BP 76 EP 77 PG 2 WC Dance SC Dance GA EU665 UT WOS:A1991EU66500045 ER PT J AU PAZZAGLIA, G BOURGEOIS, AL ELDIWANY, K NOUR, N BADRAN, N HABLAS, R AF PAZZAGLIA, G BOURGEOIS, AL ELDIWANY, K NOUR, N BADRAN, N HABLAS, R TI CAMPYLOBACTER DIARRHEA AND AN ASSOCIATION OF RECENT DISEASE WITH ASYMPTOMATIC SHEDDING IN EGYPTIAN CHILDREN SO EPIDEMIOLOGY AND INFECTION LA English DT Article ID FETUS SUBSP-JEJUNI; ENTERITIS AB A hospital-based case-control diarrhoea survey was conducted in Cairo, Egypt to determine the age-specific frequency of campylobacter infection among diarrhoeic and non-diarrhoeic children aged new born to 5 years. Campylobacter was the most common bacterial enteropathogen isolated from diarrhoeic stools. The overall prevalence of campylobacter isolations was 25.9% from stools of 143 diarrhoeic children compared to 15.2% of 132 non-diarrhoeic control children (P = 0.028) during the 4-month period of study. Children less than 1 year of age were at greatest risk of campylobacter infection with 32.6% of diarrhoeic patients culture positive, compared to 14.3% of controls. Asymptomatic shedding in controls was positively associated with a recent diarrhoeal episode (P = 0.019) and may be an important source of new infections. C1 AL AZHAR UNIV,FAC MED,CAIRO,EGYPT. RP PAZZAGLIA, G (reprint author), USN,DIV RES PUBLICAT,MED RES UNIT 3,NEW YORK,NY 09527, USA. NR 12 TC 18 Z9 18 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0950-2688 J9 EPIDEMIOL INFECT JI Epidemiol. Infect. PD FEB PY 1991 VL 106 IS 1 BP 77 EP 82 PG 6 WC Public, Environmental & Occupational Health; Infectious Diseases SC Public, Environmental & Occupational Health; Infectious Diseases GA EX701 UT WOS:A1991EX70100009 PM 1993455 ER PT J AU MILLER, AR AF MILLER, AR TI SOLUTIONS OF FERMAT LAST EQUATION IN TERMS OF WRIGHT HYPERGEOMETRIC FUNCTION SO FIBONACCI QUARTERLY LA English DT Article C1 USN,RES LAB,WASHINGTON,DC 20375. NR 7 TC 2 Z9 2 U1 0 U2 0 PU FIBONACCI ASSOC PI SANTA CLARA PA UNIV SANTA CLARA, SANTA CLARA, CA 95053 SN 0015-0517 J9 FIBONACCI QUART JI Fibonacci Q. PD FEB PY 1991 VL 29 IS 1 BP 52 EP 56 PG 5 WC Mathematics SC Mathematics GA EW183 UT WOS:A1991EW18300009 ER PT J AU SIECKMANN, DG STALL, AM SUBBARAO, B AF SIECKMANN, DG STALL, AM SUBBARAO, B TI A MOUSE MONOCLONAL-ANTIBODY SPECIFIC FOR AN ALLOTYPIC DETERMINANT OF THE IGHA ALLELE OF MURINE IGM - GENETIC AND FUNCTIONAL-ANALYSIS OF IGH-6A EPITOPES USING ANTI-IGM MONOCLONAL-ANTIBODIES SO HYBRIDOMA LA English DT Article ID LINKED IMMUNOSORBENT ASSAY; 4 CONSTANT DOMAINS; B-CELLS; MEMBRANE IGM; HEAVY-CHAIN; IMMUNOGLOBULIN; LYMPHOCYTES; INDUCTION AB An IgG1 mouse monoclonal antibody (MAb) specific for a mouse IgM allotypic determinant in the a, c, f, g, h, and j haplotypes was derived from a fusion of SP2/0-Ag14 mouse myeloma cells with C57BL/6 mouse spleen cells (Igh-C(b)) immune to TC31, a MAb of the IgM(a) allotype. MAb from one hybridoma derived from this fusion (designated DS1) was demonstrated to bind in an ELISA to immunoglobulin bearing the IgM(a) allotype (TC31, MOPC104E), but not to immunoglobulin bearing the IgM(b) allotype (C. BPC112). Fluorescein-conjugated DS1 was shown to bind to the surface of BALB/cByJ splenic B cells, but was shown to have negligible binding on C57BL/6J cells. Similarily, DS1-conjugated Sepharose beads were able to stimulate in vitro proliferation of BALB/c, but not C57BL/6 splenic B cells. DS1 was unable to bind to spleen cells from BALB/c allotype congenic strains, BAB/14 (Igh-C(b)) and C.AL-20 (Igh-C-degrees), demonstrating that DS1 recognizes a determinant under the control of a gene linked to the Igh-C gene complex. Using sera from recombinant inbred lines, the determinant defined by DS1 was shown to be linked to the Igh-1 locus. Furthermore, the determinant was localized to the CH1 domain of the mu heavy chain. Sera from BALB/cByJ, NMRI, CBA/J, SEA/GnJ, RIIIs/J, and CE/J mouse strains were shown to bind to DS1 in an ELISA, while sera from A/J, SJL/J, NZB/B1NJ, AKR/J, C57BL/6J, and C57BL/10SnJ mouse strains did not bind to DS1. From these data we propose that DS1 is reactive with specificity Igh-6.1, which was originally defined by an allotypic antiserum developed by Black et al. (Immunogenetics 7:213, 1978). C1 STANFORD UNIV,MED CTR,DEPT GENET,STANFORD,CA 94305. UNIV KENTUCKY,SANDERS BROWN CTR AGING,DEPT MICROBIOL & IMMUNOL,LEXINGTON,KY 40536. RP SIECKMANN, DG (reprint author), USN,MED RES INST,MAIL STOP 32,BETHESDA,MD 20814, USA. FU PHS HHS [K00422] NR 31 TC 26 Z9 26 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 1991 VL 10 IS 1 BP 121 EP 135 DI 10.1089/hyb.1991.10.121 PG 15 WC Biochemical Research Methods; Biotechnology & Applied Microbiology; Immunology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Immunology GA EZ926 UT WOS:A1991EZ92600012 PM 1709612 ER PT J AU BARNES, NP ALLEN, RE AF BARNES, NP ALLEN, RE TI ROOM-TEMPERATURE DY-YLF LASER OPERATION AT 4.34 MU-M SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article AB A Dy:YLF laser, operating on the 6H11/2 to 6H13/2 transition at 4.34-mu-m, has been demonstrated. A solid-state laser operating at this wavelength is one of the longest wavelength solid-state lasers known. An investigation of this material includes both spectroscopic and laser results. Spectroscopic results include the measurements of the absorption spectra and the lifetimes of both the upper- and lower-lser manifolds. Laser results, obtained using a 1.73-mu-m Er:YLF pump laser, achieved a slope efficiency in excess of 0.05. C1 USN,RES LAB,WASHINGTON,DC 20375. RP BARNES, NP (reprint author), NASA,LANGLEY RES CTR,HAMPTON,VA 23665, USA. NR 13 TC 46 Z9 47 U1 1 U2 12 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 1991 VL 27 IS 2 BP 277 EP 282 DI 10.1109/3.78231 PG 6 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA FG745 UT WOS:A1991FG74500015 ER PT J AU ESMAN, RD WILLIAMS, KJ WHITE, MH UZUNOGLU, V AF ESMAN, RD WILLIAMS, KJ WHITE, MH UZUNOGLU, V TI MICROWAVE SUBCARRIER AND CLOCK RECOVERY BY AN OPTICALLY INJECTED CPSO SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article ID PHASE; OSCILLATOR; SYSTEM AB Demodulation of phase-shift-keyed microwave subcarriers as well as timing for baseband modulation require phase extraction. We present a technique to recover phase-locked microwave subcarriers or clocks from optical signals. A coherent phase-locked synchronous oscillator (CPSO) locks to the subcarrier of an optically injected signal and allows coherent demodulation of 1.4-Gb/s PSK modulation of a 4.2-GHz subcarrier. C1 LEHIGH UNIV,SHERMAN FAIRCHILD LAB,BETHLEHEM,PA 18015. SYNCHTRACK CORP,GAITHERSBURG,MD 20877. RP ESMAN, RD (reprint author), USN,RES LAB,CODE 6572,WASHINGTON,DC 20375, USA. NR 12 TC 4 Z9 4 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 1041-1135 J9 IEEE PHOTONIC TECH L JI IEEE Photonics Technol. Lett. PD FEB PY 1991 VL 3 IS 2 BP 179 EP 181 DI 10.1109/68.76882 PG 3 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA FF120 UT WOS:A1991FF12000030 ER PT J AU TIRUMALAI, PP BUTLER, JT AF TIRUMALAI, PP BUTLER, JT TI MINIMIZATION ALGORITHMS FOR MULTIPLE-VALUED PROGRAMMABLE LOGIC-ARRAYS SO IEEE TRANSACTIONS ON COMPUTERS LA English DT Article DE ABSOLUTE MINIMIZATION; HEURISTIC MINIMIZATION; IMPLICANT; MULTIPLE-VALUED LOGIC; PRIME IMPLICANT; PROGRAMMABLE LOGIC ARRAYS; SUM-OF-PRODUCTS AB We analyze the performance of various heuristic algorithms for minimizing realizations of multiple-valued functions by the newly developed CCD [9] and CMOS [15] programmable logic arrays. The functions realized by such PLA's are in sum-of-products form, where sum is ordinary addition truncated to the highest logic value, and where product represents the MIN operation on functions of the input variables which are the interval literal operations. We compare three previously published heuristics, Pomper and Armstrong [14], Besslich [3], and Dueck and Miller [6], over sets of random and random symmetric functions. We show an exact minimization method that is a tree search using backtracking. A considerable reduction in the search space is achieved by considering constrained implicant sets and by eliminating some implicants altogether. Even with this improvement, the time required for exact minimization is extremely high when compared to all three heuristics. We also examine the case where only prime implicants are considered and show that such implicants have marginal value compared to constrained implicant sets. Our basis of comparison is the average number of product terms. We show that the heuristic methods are reasonably close to minimal and produce nearly the same average number of product terms. Interestingly though, there is surprisingly little overlap in the set of functions where the best realization is achieved. Thus, there is a benefit to applying all three heuristics to a given function and then choosing the best realization. C1 USN,POSTGRAD SCH,MONTEREY,CA 93943. RP TIRUMALAI, PP (reprint author), HEWLETT PACKARD CO,PALO ALTO,CA 94304, USA. NR 19 TC 18 Z9 18 U1 0 U2 0 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 SN 0018-9340 J9 IEEE T COMPUT JI IEEE Trans. Comput. PD FEB PY 1991 VL 40 IS 2 BP 167 EP 177 DI 10.1109/12.73587 PG 11 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA EZ239 UT WOS:A1991EZ23900005 ER PT J AU SCHAU, HC AF SCHAU, HC TI EDGE-CONNECTED, CROSSED-ELECTRODE ARRAY FOR 2-DIMENSIONAL PROJECTION AND BEAMFORMING SO IEEE TRANSACTIONS ON SIGNAL PROCESSING LA English DT Article AB A new geometry for array construction is discussed which employs two sets of orthogonal striped electrodes. While obtaining N2 intersecting points in a two-dimensional structure, only 2N control points are required. Thus, N2 active elements are controlled with 2N degrees of freedom which both simplifies implementation and data handling. This gain in simplicity is traded off against reduced performance when employed as a projector and increased signal processing when employed in beamforming mode. It is shown that no performance is lost in beamforming if the process is carried out in a two-step process. The limitations of the crossed-electrode geometry are discussed and a theory is presented for operation as a projector and a receiver. RP SCHAU, HC (reprint author), USN,RES LAB,UNDERWATER SOUND REFERENCE DETACHMENT,ORLANDO,FL 32856, USA. NR 15 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 1053-587X J9 IEEE T SIGNAL PROCES JI IEEE Trans. Signal Process. PD FEB PY 1991 VL 39 IS 2 BP 289 EP 297 DI 10.1109/78.80811 PG 9 WC Engineering, Electrical & Electronic SC Engineering GA EU963 UT WOS:A1991EU96300002 ER PT J AU SHIMEALL, TJ LEVESON, NG AF SHIMEALL, TJ LEVESON, NG TI AN EMPIRICAL-COMPARISON OF SOFTWARE FAULT TOLERANCE AND FAULT ELIMINATION SO IEEE TRANSACTIONS ON SOFTWARE ENGINEERING LA English DT Article DE ASSERTIONS; BACK-TO-BACK TESTING; CODE READING; EVALUATION OF SOFTWARE METHODOLOGIES; FAULT ELIMINATION; FAULT TOLERANCE; N-VERSION PROGRAMMING; SOFTWARE EXPERIMENTS; STATIC ANALYSIS; TESTING AB Reliability is an important concern in the development of software for modern systems. The authors have performed a study that compares two major approaches to the improvement of software-software fault elimination and software fault tolerance-by examination of the fault detection (and tolerance where applicable) of five techniques: run-time assertions, multiversion voting, functional testing augmented by structural testing, code reading by stepwise abstraction, and static data-flow analysis. The study focused on characterizing the sets of faults detected by the techniques and on characterizing the relationships between these sets of faults. Two categories of questions were investigated: 1) comparisons between fault-elimination and fault-tolerance techniques and 2) comparisons among various testing techniques. The results provide information useful for making decisions about the allocation of project resources, point out strengths and weaknesses of the techniques studied, and suggest directions for future research. C1 UNIV CALIF IRVINE,DEPT INFORMAT & COMP SCI,IRVINE,CA 92717. RP SHIMEALL, TJ (reprint author), USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943, USA. NR 29 TC 13 Z9 13 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 0098-5589 J9 IEEE T SOFTWARE ENG JI IEEE Trans. Softw. Eng. PD FEB PY 1991 VL 17 IS 2 BP 173 EP 182 DI 10.1109/32.67598 PG 10 WC Computer Science, Software Engineering; Engineering, Electrical & Electronic SC Computer Science; Engineering GA FA948 UT WOS:A1991FA94800010 ER PT J AU LITTLE, R SMIDT, S HUANG, P ROMANS, J DEDRICK, J MATUSZKO, JS AF LITTLE, R SMIDT, S HUANG, P ROMANS, J DEDRICK, J MATUSZKO, JS TI IMPROVED DRAG REDUCTION BY CONTROL OF POLYMER PARTICLE-SIZE SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID DEGRADATION; FLOW AB Solutions and slurries of the drag-reducing polymer poly(ethylene oxide) were injected into a turbulent flow of water in a piping system to determine if a polymer slurry provides an enhanced drag reduction lifetime over a solution. Drag reduction over time and distance was determined by measuring pressure differentials along the pipe length of the system. The slurry systems that possessed different particle size cuts were then compared with the solution injection results. It was found that the particle size content of the injected polymer slurry could be optimized to yield a reduction in skin friction (drag reduction) which was 17-19% greater, overall, than that observed for the injected polymer solution in the piping system under the same flow conditions. It is felt that the rate of production of freshly dissolved polymer arising from the dispersed slurry particles compensates for the degradation rate of the sheared dissolved polymer, thus maintaining a higher level of drag reduction per unit length of pipe. C1 USN,RES LAB,NAVY TECHNOL CTR SAFETY & SURVIVABIL,WASHINGTON,DC 20375. VERSAR INC,SPRINGFIELD,VA 22151. GEOCENTERS INC,NEWTON CTR,MA 02159. HUGHES ASSOCIATES INC,WHEATON,MD 20902. NR 10 TC 17 Z9 17 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD FEB PY 1991 VL 30 IS 2 BP 403 EP 407 DI 10.1021/ie00050a018 PG 5 WC Engineering, Chemical SC Engineering GA EW607 UT WOS:A1991EW60700018 ER PT J AU BROOK, I MYHAL, ML AF BROOK, I MYHAL, ML TI ADHERENCE OF BACTEROIDES-FRAGILIS GROUP SPECIES SO INFECTION AND IMMUNITY LA English DT Note ID ESCHERICHIA-COLI; STRAINS; MELANINOGENICUS; POLYSACCHARIDE; PATHOGENICITY; ADHESION; SURFACE AB The ability of piliated and capsulated Bacteroides fragilis and Bacteroides ovatus to adhere to intestinal cells and mucus was investigated. The adherence of piliated and capsulated strains was at least five times greater than the adherence of their nonpiliated and noncapsuloated or capsulated only counterparts. These data illustrate the importance of pili as promoters of adherence of B. fragilis group species to the gastrointestinal mucosa. C1 USN,MED RES INST,BETHESDA,MD 20814. NR 16 TC 17 Z9 17 U1 0 U2 1 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 FEB PY 1991 VL 59 IS 2 BP 742 EP 744 PG 3 WC Immunology; Infectious Diseases SC Immunology; Infectious Diseases GA EU973 UT WOS:A1991EU97300045 PM 1670934 ER PT J AU DAVIS, JA LAMBERSON, WR AF DAVIS, JA LAMBERSON, WR TI EFFECT OF HETEROSIS ON PERFORMANCE OF MICE ACROSS 3 ENVIRONMENTS SO JOURNAL OF ANIMAL SCIENCE LA English DT Article DE MICE; HETEROSIS; INTERACTIONS ID SELECTION; WEIGHT; LINES AB Performance of six genetic groups of mice was studied in three different environments in order to determine the effect of heterosis on consistency of performance in varied environments. Designed as a 3 x 6 factorial, data were analyzed using least squares analyses of variance. Genetic group effects, environmental effects, genetic group x environment interaction, and heterosis were examined for 42-d weight, age and weight at vaginal opening, age and weight at puberty, ovulation rate (determined by total corpora lutea), number of implantations, and number of fetuses at 10 d of gestation. Weight at vaginal opening, ovulation rate, implantation rate and total number of fetuses exhibited significant heterosis. Regression of these traits against an environmental index (mean performance of all genetic groups over environments) provided an estimate of stability of performance. In general, genetic groups exhibiting heterosis expressed more consistent performance across environments than pure lines did. We concluded that a stability model could be used to aid in identification of lines with consistent performance for production traits in variable environments. C1 USN,MED RES INST,DEPT LAB ANIM SCI,BETHESDA,MD 20889. UNIV MISSOURI,DEPT ANIM SCI,COLUMBIA,MO 65211. NR 30 TC 5 Z9 5 U1 0 U2 0 PU AMER SOC ANIMAL SCIENCE PI SAVOY PA 1111 NORTH DUNLAP AVE, SAVOY, IL 61874 SN 0021-8812 J9 J ANIM SCI JI J. Anim. Sci. PD FEB PY 1991 VL 69 IS 2 BP 543 EP 550 PG 8 WC Agriculture, Dairy & Animal Science SC Agriculture GA FW978 UT WOS:A1991FW97800013 PM 2016184 ER PT J AU MCKEEVER, SWS WALTERS, RJ MESSENGER, SR SUMMERS, GP AF MCKEEVER, SWS WALTERS, RJ MESSENGER, SR SUMMERS, GP TI DEEP LEVEL TRANSIENT SPECTROSCOPY OF IRRADIATED P-TYPE INP GROWN BY METALORGANIC CHEMICAL VAPOR-DEPOSITION SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID RADIATION-INDUCED DEFECTS; SOLAR-CELLS; RECOMBINATION; DAMAGE; CRYSTALS AB Results are presented of a deep level transient spectroscopy study of radiation-induced defects in p-type (Zn-doped) InP grown by metalorganic chemical vapor deposition. Three major hole traps (H3, H4, and H5) and two electron traps (EA and EB) were observed. The electron trap structure in particular is significantly different from that reported in the literature for p-type InP grown by other methods. Activation energies of 0.22 eV (EA) and 0.76 eV (EB) have been measured, and capture cross sections (sigma-infinity) of 4.4 x 10(-15) cm2 (EA), and 1.4 x 10(-12) cm-2 (EB) have been determined. The H5 center has a thermally activated capture cross section with an energy barrier of 0.35 eV. The measured injection annealing rate of the primary hole trap (H4) was different than previously observed. C1 OKLAHOMA STATE UNIV,DEPT PHYS,STILLWATER,OK 74078. UNIV MARYLAND,DEPT PHYS,CATONSVILLE,MD 21228. RP MCKEEVER, SWS (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 21 TC 20 Z9 20 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD FEB 1 PY 1991 VL 69 IS 3 BP 1435 EP 1439 DI 10.1063/1.347284 PG 5 WC Physics, Applied SC Physics GA EW671 UT WOS:A1991EW67100046 ER PT J AU YEH, DC SIBLEY, WA SCHNEIDER, I AFZAL, RS AGGARWAL, I AF YEH, DC SIBLEY, WA SCHNEIDER, I AFZAL, RS AGGARWAL, I TI INTENSITY-DEPENDENT UPCONVERSION EFFICIENCIES OF ER-3+ IONS IN HEAVY-METAL FLUORIDE GLASS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID DOPED FLUOROZIRCONATE FIBER; INFRARED ERBIUM LASER; COLOR-CENTER LASER; ENERGY-TRANSFER; MU-M; CONTINUOUS-WAVE; ROOM-TEMPERATURE; FREQUENCY UPCONVERSION; TM-3+ IONS; ER3+ IONS AB The upconversion of infrared radiation to shorter wavelengths by Er3+ ions in heavy-metal fluoride glasses, some doped with Yb3+, has been studied over a wide intensity range and for various excitation wavelengths. The upconversion efficiency measured at room temperature varies linearly or quadratically with intensity and saturates at 100 W/cm2 or higher, depending on emission wavelength. For 4 mol% ErF3 in BaF2/ThF4, the 4I11/2 to 4I15/2 transition is over 10% efficient for 40 W/cm2 of absorbed 1.5-mu-m power, i.e. for 4I15/2 to 4I13/2 excitation. A rate equation model and Judd-Ofelt analysis of data for the glasses doped with just Er3+ provide an understanding of the upconversion process while yielding values for Er3+ energy-transfer rates and excited-state populations. These results could be used to develop glasses for lasing and as infrared optical detectors. C1 NATL SCI FDN,WASHINGTON,DC 20550. USN,RES LAB,WASHINGTON,DC 20375. RP YEH, DC (reprint author), OKLAHOMA STATE UNIV,DEPT PHYS,STILLWATER,OK 74078, USA. NR 48 TC 44 Z9 44 U1 0 U2 4 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 1991 VL 69 IS 3 BP 1648 EP 1653 DI 10.1063/1.347208 PG 6 WC Physics, Applied SC Physics GA EW671 UT WOS:A1991EW67100080 ER PT J AU LIND, RJ SHAW, WJ AF LIND, RJ SHAW, WJ TI THE TIME-VARYING CALIBRATION OF AN AIRBORNE LYMAN-ALPHA HYGROMETER SO JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY LA English DT Note AB Calibration of an airborne Lyman-alpha hygrometer against simultaneous measurements of humidity from a dewpoint hygrometer shows that Lyman-alpha biases drift with time. Analyses of low-level flight data from four days during the 1986 Frontal Air-Sea Interaction Experiment indicate that Lyman-alpha gains are constant for each flight (approximately 3 h duration) but different on each day. If not explicitly accounted for, the time-varying bias can introduce a significant error in calculated humidities from the Lyman-alpha hygrometer. RP LIND, RJ (reprint author), USN,POSTGRAD SCH,DEPT METEOROL,CODE MR-LN,MONTEREY,CA 93943, USA. NR 0 TC 3 Z9 3 U1 0 U2 1 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 1991 VL 8 IS 1 BP 186 EP 190 DI 10.1175/1520-0426(1991)008<0186:TTVCOA>2.0.CO;2 PG 5 WC Engineering, Ocean; Meteorology & Atmospheric Sciences SC Engineering; Meteorology & Atmospheric Sciences GA FC515 UT WOS:A1991FC51500018 ER PT J AU CAMPBELL, ML AF CAMPBELL, ML TI THE CORRECT INTERPRETATION OF HUNDS RULE AS APPLIED TO UNCOUPLED STATES ORBITAL DIAGRAMS SO JOURNAL OF CHEMICAL EDUCATION LA English DT Article RP CAMPBELL, ML (reprint author), USN ACAD, ANNAPOLIS, MD 21402 USA. NR 28 TC 1 Z9 1 U1 0 U2 0 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 1991 VL 68 IS 2 BP 134 EP 135 PG 2 WC Chemistry, Multidisciplinary; Education, Scientific Disciplines SC Chemistry; Education & Educational Research GA EY746 UT WOS:A1991EY74600021 ER PT J AU BROOKS, DW LYONS, EJ KOUBEK, E AF BROOKS, DW LYONS, EJ KOUBEK, E TI A TITRIMETRIC DETERMINATION USING LASER-BEAM SCATTERING FOR END-POINT DETERMINATION SO JOURNAL OF CHEMICAL EDUCATION LA English DT Note C1 LINCOLN E HIGH SCH,LINCOLN,NE 68510. USN ACAD,ANNAPOLIS,MD 21402. RP BROOKS, DW (reprint author), UNIV NEBRASKA,LINCOLN,NE 68588, USA. NR 4 TC 0 Z9 0 U1 0 U2 0 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 1991 VL 68 IS 2 BP 155 EP 155 PG 1 WC Chemistry, Multidisciplinary; Education, Scientific Disciplines SC Chemistry; Education & Educational Research GA EY746 UT WOS:A1991EY74600030 ER PT J AU HENRY, RL NORDQUIST, PER GORMAN, RJ QADRI, SB AF HENRY, RL NORDQUIST, PER GORMAN, RJ QADRI, SB TI GROWTH OF (100)GAAS BY VERTICAL ZONE-MELTING SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 8TH AMERICAN CONF ON CRYSTAL GROWTH ( ACCG-8 ) CY JUL 15-20, 1990 CL VAIL, CO SP AMER ASSOC CRYSTAL GROWTH ID SEMI-INSULATING GAAS; CRYSTALS AB The vertical zone melt growth technique (VZM) was used to grow undoped, semi-insulating GaAs. Single crystals 34 mm in diameter were grown in the [100] direction. A molten zone length of 23 mm resulted in a solid-liquid interface which deviated only slightly from planarity to give a convex growing interface. With a vertical temperature gradient of 9-degrees-C cm-1 (measured in the furnace), the dislocation density was a uniform (2-5) x 10(3) cm-2 throughout the crystal. Hall measurements, carbon determinations and EL2 determinations all indicated that the GaAs had a relatively uniform impurity content in the first 80% of the crystal. VZM was also used to zone level Sn dopant to give an n-type carrier concentration varying by approximately 20% over 80% of the crystal length. RP HENRY, RL (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 13 TC 15 Z9 15 U1 2 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 FEB PY 1991 VL 109 IS 1-4 BP 228 EP 233 DI 10.1016/0022-0248(91)90183-6 PG 6 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA FB603 UT WOS:A1991FB60300036 ER PT J AU DESISTO, WJ HENRY, RL AF DESISTO, WJ HENRY, RL TI PREPARATION AND CHARACTERIZATION OF MGO THIN-FILMS DEPOSITED BY SPRAY PYROLYSIS OF MG(2,4-PENTANEDIONATE)2 SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 8TH AMERICAN CONF ON CRYSTAL GROWTH ( ACCG-8 ) CY JUL 15-20, 1990 CL VAIL, CO SP AMER ASSOC CRYSTAL GROWTH ID SUBSTRATE; LAYERS AB Thin films of magnesia (0.1 - 0.5-mu-m) were deposited by a spray pyrolysis method. Aqueous and alcoholic solutions of magnesium (2,4-pentanedionate)2 were ultrasonically nebulized and thermally decomposed onto a variety of substrates at temperatures between 400 and 540-degrees-C. Strong (100) orientation of MgO was observed on alumina coated sapphire as deposited from alcoholic solutions at 470-degrees-C. In addition, strong (100) orientation was observed on samples prepared from thermally decomposing aqueous solutions on sapphire followed by oxygen anneals at 700 and 93-degrees-C. RP DESISTO, WJ (reprint author), USN,RES LAB,DIV ELECTR SCI & TECHNOL,WASHINGTON,DC 20375, USA. NR 10 TC 14 Z9 14 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 1991 VL 109 IS 1-4 BP 314 EP 317 PG 4 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA FB603 UT WOS:A1991FB60300050 ER PT J AU WALKER, TL DELRIO, CE AF WALKER, TL DELRIO, CE TI HISTOLOGICAL-EVALUATION OF ULTRASONIC DEBRIDEMENT COMPARING SODIUM-HYPOCHLORITE AND WATER SO JOURNAL OF ENDODONTICS LA English DT Article ID ELECTRON-MICROSCOPIC EVALUATION; ROOT-CANAL IRRIGATION; TISSUE AB Twenty extracted human mandibular first and second molars with mesial canal curvatures of 18 to 35 degrees were randomly divided into two groups. Following routine endodontic access and canal length determination one of the mesial root canals was ultrasonically instrumented, using tap water in the first group or 2.6% sodium hypochlorite irrigation in the other. In both groups the other mesial canal was used as a control. The mesial roots were decalcified, serially sectioned, and stained with hematoxylin and eosin. Wall planning and soft tissue debridement were blindly evaluated using the light microscope. Mean canal wall planing and soft tissue debridement scores were compared by multiple t tests. Sodium hypochlorite, in conjunction with ultrasonic instrumentation, was more effective than tap water in wall planing when the entire root length was considered. Sodium hypochlorite, in conjunction with ultrasonic instrumentation, was more effective than tap water in soft tissue debridement in the middle third of the canal. Both irrigants were ineffective in conjunction with ultrasonic instrumentation in removing soft tissue from the main canal, the isthmus between canals, the canal fins, and the multiple branches or deltas often encountered in the apical one-third of the canal. C1 UNIV TEXAS,HLTH SCI CTR,SCH DENT,DEPT ENDODONT,SAN ANTONIO,TX 78284. RP WALKER, TL (reprint author), USN,DENT CLIN,DEPT ENDODONT,NORFOLK,VA 23511, USA. NR 17 TC 12 Z9 14 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0099-2399 J9 J ENDODONT JI J. Endod. PD FEB PY 1991 VL 17 IS 2 BP 66 EP 71 DI 10.1016/S0099-2399(06)81610-9 PG 6 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA EV488 UT WOS:A1991EV48800004 PM 1919404 ER PT J AU LIGRANI, PM SUBRAMANIAN, CS CRAIG, DW KAISUWAN, P AF LIGRANI, PM SUBRAMANIAN, CS CRAIG, DW KAISUWAN, P TI EFFECTS OF VORTICES WITH DIFFERENT CIRCULATIONS ON HEAT-TRANSFER AND INJECTANT DOWNSTREAM OF A ROW OF FILM-COOLING HOLES IN A TURBULENT BOUNDARY-LAYER SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME LA English DT Article DE FORCED CONVECTION; TURBINES; TURBULENCE ID TURBINE BLADE; VORTEX; FLOWS AB Results are presented that illustrate the effects of single embedded longitudinal vortices on heat transfer and injectant downstream of a row of film-cooling holes in a turbulent boundary layer. Attention is focused on the changes resulting as circulation magnitudes of the vortices are varied from 0.0 to 0.15 m2/s. Mean temperature results are presented that show how injectant is distorted and redistributed by vortices, along with heat transfer measurements and mean velocity surveys. Injection hole diameter is 0.952 cm to give a ratio of vortex core diameter to hole diameter of about 1.5-1.6. The free-stream velocity is maintained at 10 m/s, and the blowing ratio is approximately 0.5. Film-cooling holes are oriented 30 deg with respect to the test surface. Stanton numbers are measured on a constant heat flux surface with a nondimensional temperature parameter of about 1.5. Two different situations are studied: one where the middle injection hole is beneath the vortex downwash, and one where the middle injection hole is beneath the vortex upwash. For both cases, vortex centers pass within 2.9-3.4 vortex core diameters of the centerline of the middle injection hole. To quantify the influences of the vortices on the injectant, two new parameters are introduced. S is defined as the ratio of vortex circulation to injection hole diameter times mean injection velocity. S1 is similarly defined except vortex core diameter replaces injection hole diameter. The perturbation to film injectant and local heat transfer is determined by the magnitudes of S and S1. When S is greater than 1-1.5 or when S1 is greater than 0.7-1.0, injectant is swept into the vortex upwash and above the vortex core by secondary flows, and Stanton number data show evidence of injectant beneath the vortex core and downwash near the wall for x/d only up to about 17.5. For larger x/d, local hot spots are present, and the vortices cause local Stanton numbers to be augmented by as much as 25 percent in the film-cooled boundary layers. When S and S1 are less than these values, some injectant remains near the wall beneath the vortex core and downwash where it continues to provide some thermal protection. In some cases, the protection provided by film cooling is augmented because of vortex secondary flows, which cause extra injectant to accumulate near upwash regions. C1 USN,POSTGRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93943. OI Subramanian, Chelakara S./0000-0003-4149-2972 NR 23 TC 2 Z9 2 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0022-1481 J9 J HEAT TRANS-T ASME JI J. Heat Transf.-Trans. ASME PD FEB PY 1991 VL 113 IS 1 BP 79 EP 90 DI 10.1115/1.2910555 PG 12 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA HP758 UT WOS:A1991HP75800011 ER PT J AU CHAROENVIT, Y MELLOUK, S COLE, C BECHARA, R LEEF, MF SEDEGAH, M YUAN, LF ROBEY, FA BEAUDOIN, RL HOFFMAN, SL AF CHAROENVIT, Y MELLOUK, S COLE, C BECHARA, R LEEF, MF SEDEGAH, M YUAN, LF ROBEY, FA BEAUDOIN, RL HOFFMAN, SL TI MONOCLONAL, BUT NOT POLYCLONAL, ANTIBODIES PROTECT AGAINST PLASMODIUM-YOELII SPOROZOITES SO JOURNAL OF IMMUNOLOGY LA English DT Article ID CIRCUMSPOROZOITE PROTEIN; FALCIPARUM SPOROZOITES; BERGHEI SPOROZOITES; MALARIA SPOROZOITES; SYNTHETIC PEPTIDES; SUBUNIT VACCINES; MURINE MALARIA; IMMUNOGENICITY; RECOMBINANT; GENE AB One of the primary strategies for malaria vaccine development has been to design subunit vaccines that induce protective levels of antibodies against the circumsporozoite (CS) protein of malaria sporozoites. In the Plasmodium yoelii mouse model system such vaccines have been uniformly unsuccessful in protecting against sporozoite-induced malaria. To demonstrate that antibodies to P. yoelii CS protein could provide protection we established a passive transfer model. Passive transfer of Navy yoelii sporozoite 1 (NYS1), an IgG3 mAb against the P. yoelii CS protein, protected 100% of mice against challenge with 5000 P. yoelii sporozoites. Binding of NYS1 to sporozoites was inhibited by incubation with (QGPGAP)2, a synthetic peptide derived from the repeat region of the P. yoelii CS protein, indicating that the epitope on sporozoites recognized by this mAb was included within this peptide. The levels of antibodies to (QGPGAP)2 by ELISA, and to sporozoites by indirect fluorecent antibody test and CS precipitation reaction were similar in sera from mice that received NYS1 in passive transfer and were protected against challenge with 5000 sporozoites, and from mice that had been immunized with subunit vaccines containing (QGPGAP)2 but were not protected against challenge with 40-200 sporozoites. To determine if antibody avidity, not absolute concentration could explain the striking differences in protection, we established a thiocyanate elution assay. The results suggest that NYS1, the protective mAb, has a lower avidity for (QGPGAP)2 and for sporozoites than do the vaccine-induced antibodies. Although the results of the conventional antibody assays did not correlate with protection, sera from the protected animals inhibited sporozoite development in mouse hepatocyte cultures significantly more than did the sera from the unprotected, subunit vaccine-immunized animals, correlating with protection. The data clearly demonstrate that antibodies to the CS protein can protect against intense sporozoite infection. Improved understanding of the differences between protective mAb and nonprotective polyclonal antibodies will be important in the further development of malaria vaccines. C1 USN,MED RES INST,DEPT INFECT DIS,BETHESDA,MD 20889. NIDR,BETHESDA,MD 20892. NR 30 TC 98 Z9 98 U1 0 U2 3 PU AMER ASSOC IMMUNOLOGISTS PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0022-1767 J9 J IMMUNOL JI J. Immunol. PD FEB 1 PY 1991 VL 146 IS 3 BP 1020 EP 1025 PG 6 WC Immunology SC Immunology GA EU926 UT WOS:A1991EU92600033 PM 1988490 ER PT J AU BUTLER, LG AF BUTLER, LG TI DISPLAYING THE RESULTS FROM NMR PULSE SEQUENCE SIMULATIONS AS STEREO DIAGRAMS SO JOURNAL OF MAGNETIC RESONANCE LA English DT Note C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. NR 6 TC 3 Z9 3 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 0022-2364 J9 J MAGN RESON PD FEB 1 PY 1991 VL 91 IS 2 BP 396 EP 399 DI 10.1016/0022-2364(91)90203-6 PG 4 WC Biochemical Research Methods; Physics, Atomic, Molecular & Chemical; Spectroscopy SC Biochemistry & Molecular Biology; Physics; Spectroscopy GA EV483 UT WOS:A1991EV48300016 ER PT J AU HYAMS, KC HUSSAIN, MAM ALARABI, MA ATALLAH, NA ELTIGANI, A MCCARTHY, MC AF HYAMS, KC HUSSAIN, MAM ALARABI, MA ATALLAH, NA ELTIGANI, A MCCARTHY, MC TI ACUTE SPORADIC HEPATITIS IN SUDANESE CHILDREN SO JOURNAL OF MEDICAL VIROLOGY LA English DT Article DE EPSTEIN-BARR VIRUS; JAUNDICE; ENTERIC TRANSMISSION ID NON-B-HEPATITIS; EPIDEMIC NON-A; VIRAL-HEPATITIS; VIRUS; ETIOLOGY; ADULTS; CAIRO; EGYPT; WATER; INDIA AB Eighty consecutive cases of acute viral hepatitis and 80 controls selected from a public pediatric clinic were entered into a study of acute sporadic hepatitis in Khartoum, Sudan. Study subjects were 14 years of age or younger and were mainly from a low socioeconomic level. Non-A, non-B hepatitis was diagnosed by exclusion in 35 (43.8%) patients, hepatitis A in 27 (33.8%), acute hepatitis B in 8 (10.0%), possible Epstein-Barr virus (EBV) hepatitis in 1 patient; and dual hepatitis A and B infection in 1 patient. Eight acute cases were positive for HBsAg but negative for anti-HBc IgM and anti-HAV IgM. Delta hepatitis was not identified in any study subject. A household case of jaundice and acquaintance with an individual outside of the household with jaundice during the prior 6 months were associated with non-A, non-B hepatitis. There was no association between parenteral exposure and non-A, non-B hepatitis. These findings suggest that enterically transmitted non-A, non-B hepatitis may be a major cause of acute sporadic hepatitis in children in this area, as well as a cause of epidemic hepatitis. C1 USN,MED RES UNIT 3,CAIRO,EGYPT. KHARTOUM UNIV,TEACHING HOSP,DEPT PEDIAT,KHARTOUM,SUDAN. CENT PUBL HLTH LAB,DEPT VIROL,KHARTOUM,SUDAN. OMDURMAN HOSP,DEPT GASTROENTEROL,OMDURMAN,SUDAN. NR 18 TC 6 Z9 6 U1 0 U2 1 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0146-6615 J9 J MED VIROL JI J. Med. Virol. PD FEB PY 1991 VL 33 IS 2 BP 73 EP 76 DI 10.1002/jmv.1890330202 PG 4 WC Virology SC Virology GA EX290 UT WOS:A1991EX29000001 PM 1646853 ER PT J AU TARPLEY, RJ RIDGWAY, SH AF TARPLEY, RJ RIDGWAY, SH TI ORBITAL GLAND STRUCTURE AND SECRETIONS IN THE ATLANTIC BOTTLE-NOSED-DOLPHIN (TURSIOPS-TRUNCATUS) SO JOURNAL OF MORPHOLOGY LA English DT Article ID HARDERIAN-GLAND; LOCALIZATION; MELATONIN; ARMADILLO AB Orbital gland structure of the Atlantic bottlenose dolphin, Tursiops truncatus, was examined at the macroscopic, light microscopic, and electron microscopic levels. The gland completely encircles the ocular globe in a belt-like fashion near the conjunctival fornix but is considerably more developed medially. Duct openings are scattered throughout the fornix and over the surface of the palpebral conjunctiva. Microscopically, the gland has a tubuloalveolar arrangement; alveolar cells contain numerous secretory vesicles which can be interpreted as two structural types by light and electron microscopy. Histochemical staining demonstrates that both types contain glycosaminoglycans. Lipid analysis of the glandular secretion (dolphin tears) shows them to be non-oily and to contain only negligible amounts of cholesterol, triglycerides, phospholipids, and free fatty acids. The secretion is clear, slippery, and viscoelastic and well-adapted to protecting the eye and to reducing frictional forces between the eye surface and surrounding seawater. C1 USN,CTR OCEAN SYST,SAN DIEGO,CA 92152. NR 28 TC 9 Z9 10 U1 0 U2 2 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0362-2525 J9 J MORPHOL JI J. Morphol. PD FEB PY 1991 VL 207 IS 2 BP 173 EP 184 DI 10.1002/jmor.1052070208 PG 12 WC Anatomy & Morphology SC Anatomy & Morphology GA FC956 UT WOS:A1991FC95600007 ER PT J AU WU, CT AF WU, CT TI BENEFITS OF ABSTRACT SUPERCLASS SO JOURNAL OF OBJECT-ORIENTED PROGRAMMING LA English DT Article C1 USN,POSTGRAD SCH,MONTEREY,CA 93940. 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 FEB PY 1991 VL 3 IS 6 BP 57 EP & PG 0 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA EW222 UT WOS:A1991EW22200008 ER PT J AU KNOFF, SB VANSICKELS, JE HOLMGREEN, WC AF KNOFF, SB VANSICKELS, JE HOLMGREEN, WC TI OUTPATIENT ORTHOGNATHIC SURGERY - CRITERIA AND A REVIEW OF CASES SO JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY LA English DT Article ID FORT-I OSTEOTOMY; MAXILLARY OSTEOTOMY; LEFORT-1 OSTEOTOMY; COMPLICATIONS; MANAGEMENT; HEMORRHAGE; RAMUS C1 UNIV TEXAS,HLTH SCI CTR,DEPT ORAL & MAXILLOFACIAL SURG,7703 FLOYD CURL DR,SAN ANTONIO,TX 78284. UNIV TEXAS,HLTH SCI CTR,ANAESTHESIA,SAN ANTONIO,TX 78284. USN,DENT CORPS,SAN DIEGO,CA 92132. NR 17 TC 14 Z9 15 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0278-2391 J9 J ORAL MAXIL SURG JI J. Oral Maxillofac. Surg. PD FEB PY 1991 VL 49 IS 2 BP 117 EP 120 DI 10.1016/0278-2391(91)90096-5 PG 4 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA EV577 UT WOS:A1991EV57700003 PM 1990087 ER PT J AU BAIRD, JK RIBERU, W MASBAR, S PURNOMO AF BAIRD, JK RIBERU, W MASBAR, S PURNOMO TI IVERMECTIN INHIBITS MOLTING OF WUCHERERIA-BANCROFTI 3RD-STAGE LARVAE INVITRO SO JOURNAL OF PARASITOLOGY LA English DT Note AB The effect of ivermectin or diethylcarbamazine (DEC) on Wuchereria bancrofti molting from the third to the fourth larval stage (L3 to L4) was evaluated in vitro. L3 larvae were harvested from laboratory-reared Aedes togoi 2 wk after feeding upon a microfilaremic human volunteer. The larvae were kept in an artificial medium (Franke's NI medium) with 10% human serum under an atmosphere of 5% CO2 for 20 days. Experimental tubes also contained ivermectin (0.1-1,000 ng/ml) or DEC (0.1-10,000 ng/ml). An estimated concentration of 50 ng/ml ivermectin inhibited molting in 50% of the larvae expected to molt. For DEC, this value was roughly 1,000 ng/ml. In this in vitro culture system, ivermectin inhibited the L3 to L4 molt of W. bancrofti and was roughly 20-fold more potent in this activity than DEC. C1 USN,MED RES UNIT 2,JAKARTA DETACHMENT,SAN FRANCISCO,CA 96356. NR 7 TC 5 Z9 5 U1 0 U2 0 PU AMER SOC PARASITOLOGISTS PI LAWRENCE PA 810 EAST 10TH STREET, LAWRENCE, KS 66044 SN 0022-3395 J9 J PARASITOL JI J. Parasitol. PD FEB PY 1991 VL 77 IS 1 BP 162 EP 163 DI 10.2307/3282575 PG 2 WC Parasitology SC Parasitology GA EX418 UT WOS:A1991EX41800026 PM 1992087 ER PT J AU BROOK, I AF BROOK, I TI MICROBIOLOGICAL STUDIES OF DECUBITUS ULCERS IN CHILDREN SO JOURNAL OF PEDIATRIC SURGERY LA English DT Article DE DECUBITUS ULCERS; PEDIATRIC; BACTERIAL FLORA C1 USN HOSP,DEPT PEDIAT,BETHESDA,MD. NR 12 TC 18 Z9 20 U1 0 U2 1 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0022-3468 J9 J PEDIATR SURG JI J. Pediatr. Surg. PD FEB PY 1991 VL 26 IS 2 BP 207 EP 209 DI 10.1016/0022-3468(91)90912-D PG 3 WC Pediatrics; Surgery SC Pediatrics; Surgery GA EV975 UT WOS:A1991EV97500023 PM 2023086 ER PT J AU HORTON, CW BAYLOR, KJ AF HORTON, CW BAYLOR, KJ TI OBSERVATIONS OF A COLD-CORE GULF-STREAM RING WITH AN EXPLOSIVE ELLIPTIC INSTABILITY SO JOURNAL OF PHYSICAL OCEANOGRAPHY LA English DT Note ID GEOSTROPHIC VORTICES AB A large cold-core Gulf Stream ring rapidly elongated approximately three weeks after its formation. Over a four-day period the aspect ratio of the cold core of the ring increased from about 2.8 to 6.4 as it took the form of a slender ellipse. During the next week further elongation occurred; a dipolar structure possibly formed. While the elongation and breakup of the ring may have been influenced by the proximity of the Gulf Stream, the observations support the predictions that isolated, large-enough vortices have an elliptical mode baroclinic instability. RP HORTON, CW (reprint author), USN,OCEANOG OFF,CODE MTA,STENNIS SPACE CTR,MS 39522, USA. NR 12 TC 6 Z9 7 U1 0 U2 1 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0022-3670 J9 J PHYS OCEANOGR JI J. Phys. Oceanogr. PD FEB PY 1991 VL 21 IS 2 BP 364 EP 368 DI 10.1175/1520-0485(1991)021<0364:OOACCG>2.0.CO;2 PG 5 WC Oceanography SC Oceanography GA FB604 UT WOS:A1991FB60400011 ER PT J AU PALMER, DS BARCO, MT PELLEU, GB MCKINNEY, JE AF PALMER, DS BARCO, MT PELLEU, GB MCKINNEY, JE TI WEAR OF HUMAN ENAMEL AGAINST A COMMERCIAL CASTABLE CERAMIC RESTORATIVE MATERIAL SO JOURNAL OF PROSTHETIC DENTISTRY LA English DT Article AB This study determined the effect of castable ceramic, with and without shading porcelain applied, on enamel wear. The wear produced by conventional dental porcelain was used as a control. Cusp tips from extracted human third molars were precision-machined into cones of enamel approximately 1 mm long. Three groups of nine cones each were abraded against rotating disks of (1) castable ceramic with shading porcelain, (2) castable ceramic without shading porcelain, and (3) conventional dental porcelain. Enamel wear was calculated from microscopic measurements of the enamel cones before and after abrading. Mean and standard deviation values were 1.220 +/- 0.218 for castable ceramic with shading porcelain, 0.639 +/- 0.218 for castable ceramic without shading porcelain, and 0.785 +/- 0.311 for glazed conventional dental porcelain (all values are X 10-(3) cm3). Significant differences were found between castable ceramic with and without shading porcelain and between conventional dental procelain and castable ceramic with shading porcelain (p < 0.001 ANOVA and 0.05 Scheffe's test). These findings suggest that castable ceramic with shading porcelain should not be used in regions that will function against opposing natural teeth. RP PELLEU, GB (reprint author), USN,MED COMMAND,NATL CAPITAL REG,SCH NAVAL DENT,NAVAL DENT CLIN,BETHESDA,MD 20814, USA. FU NIDCR NIH HHS [YO1-DE-30001] NR 5 TC 25 Z9 25 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 FEB PY 1991 VL 65 IS 2 BP 192 EP 195 DI 10.1016/0022-3913(91)90161-O PG 4 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA EV971 UT WOS:A1991EV97100005 PM 2051354 ER PT J AU CHRISEY, DB HORWITZ, JS NEWMAN, HS REEVES, ME WEAVER, BD GRABOWSKI, KS SUMMERS, GP AF CHRISEY, DB HORWITZ, JS NEWMAN, HS REEVES, ME WEAVER, BD GRABOWSKI, KS SUMMERS, GP TI PROTON-INDUCED REDUCTION OF RS, JC, AND TC IN YBA2CU3O7-DELTA THIN-FILMS SO JOURNAL OF SUPERCONDUCTIVITY LA English DT Article DE THIN FILMS; RADIATION DAMAGE; SURFACE RESISTANCE AB We have explored the effect of 2-MeV H+ irradiation on the superconducting transport properties of thin films of YBa2Cu3O7-delta [T(c), J(c)(B = 0; 77 K, 4.2 K), and R(s)(36 GHz; T)]. The inductively measured critical temperature T(c) changed slowly and uniformly (approximately 2 K per 10(16)/cm2) for fluences less than approximately 3 x 10(16)/cm2. Beginning at approximately 3-4 x 10(16)/cm2, the superconducting transition broadened and dropped more quickly with fluence. The critical current density measured at 77 and 4.2 K changed roughly linearly with fluence. The microwave T(c) (as defined by the sharp transition in R(s) as a function of temperature) resembled the low-frequency inductive T(c) measurement at low fluences but was depressed more strongly for large fluences. The residual surface resistance (approximately 6-10 m-OMEGA) was not affected for fluences up to 5 x 10(16)/cm2. We have interpreted the sudden and reproducible reduction in the microwave T(c) transition as a sensitive indicator of disruption in the copper-oxygen chain sublattice and compared the proton-induced change to that observed in oxygen gettering studies of bulk materials. RP CHRISEY, DB (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. OI Grabowski, Kenneth/0000-0003-0816-001X NR 0 TC 23 Z9 23 U1 0 U2 1 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0896-1107 J9 J SUPERCOND JI J. Supercond. PD FEB PY 1991 VL 4 IS 1 BP 57 EP 60 DI 10.1007/BF00618298 PG 4 WC Physics, Applied; Physics, Condensed Matter SC Physics GA FD592 UT WOS:A1991FD59200007 ER PT J AU KO, SH SCHLOEMER, HH AF KO, SH SCHLOEMER, HH TI SIGNAL PRESSURE RECEIVED BY A HYDROPHONE PLACED ON A PLATE BACKED BY A COMPLIANT BAFFLE SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB An investigation is made of the signal reception of a hydrophone placed in front of an elastic plate backed by a compliant baffle layer. The baffle layer is the compliant tube array modeled by Junger [J. Acoust. Soc. Am. 78, 1010 (1985)] to represent a homogeneous, dispersive fluid layer. Noise reduction baffles such as compliant tubes are acoustically soft and thus tend to degrade the signal received. This paper describes the development of a theoretical model for evaluating the signal reception, and a comparison of theoretical results with experimental data is presented. RP KO, SH (reprint author), USN,CTR UNDERWATER SYST,NEW LONDON,CT 06320, USA. NR 2 TC 4 Z9 4 U1 1 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 FEB PY 1991 VL 89 IS 2 BP 559 EP 564 DI 10.1121/1.400380 PG 6 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA EX020 UT WOS:A1991EX02000007 ER PT J AU COMMANDER, KW MCDONALD, RJ AF COMMANDER, KW MCDONALD, RJ TI FINITE-ELEMENT SOLUTION OF THE INVERSE PROBLEM IN BUBBLE SWARM ACOUSTICS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID FREDHOLM INTEGRAL-EQUATIONS; NUMERICAL-METHOD; 1ST KIND; SPECTRA AB The bubble population near the ocean surface is of considerable interest. This population affects surface scattering strength, propagation near the surface, and the exchange of gases between the atmosphere and the sea. Both optical and acoustical means have been used to measure the bubble population with varying degrees of success. The acoustic method requires measurements at multiple frequencies and their subsequent conversion to bubble densities through either the resonance theory approximation or numerical solution of the resulting integral equation. In this paper, a numerical solution to the integral equation is obtained using the method of weighted residuals with linear B splines as basis functions. A regularization technique is employed to stabilize the solution. A number of plausible bubble distribution functions are generated along with their acoustic properties to test the robustness of the technique. This approach is shown to yield very accurate bubble distributions from high-quality attenuation data. RP COMMANDER, KW (reprint author), USN,CTR COASTAL SYST,PANANAMA CITY,FL 32407, USA. NR 18 TC 30 Z9 31 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 1991 VL 89 IS 2 BP 592 EP 597 DI 10.1121/1.400671 PG 6 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA EX020 UT WOS:A1991EX02000011 ER PT J AU MCDONALD, BE AF MCDONALD, BE TI ECHOES FROM VERTICALLY STRIATED SUBRESONANT BUBBLE CLOUDS - A MODEL FOR OCEAN SURFACE REVERBERATION SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID LAYER AB A surface reverberation model for acoustic frequencies below several kHz is proposed based on weak scatter from inhomogeneities whose geometry is descriptive of recent ocean observation [e.g., Farmer and Vagle, J. Acoust. Soc. Am. 86, 1897 (1989)]. Scatterers in this model are vertical cylinders of elliptical cross section representing either filamentary- or sheetlike subresonant microbubble clouds whose population decreases exponentially with depth. This geometry approximates intermediate-aged fossils of breaking waves and/or convective processes. Born approximation (weak scatter) results from this model show substantial agreement with observed surface backscatter cross sections as a function of wind speed, grazing angle, and acoustic frequency in the range 0.2-20 kHz. It is demonstrated that almost all the high-frequency weak backscatter in the model is specular reflection from surfaces of volume scatterers. Some preliminary speculations involving Langmuir circulation are offered for the application of this model to surface reverberation at frequencies below a few hundred Hz, where data are scarce. RP MCDONALD, BE (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 11 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 1991 VL 89 IS 2 BP 617 EP 622 DI 10.1121/1.400386 PG 6 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA EX020 UT WOS:A1991EX02000014 ER PT J AU KENNEDY, RM SZLYK, TK AF KENNEDY, RM SZLYK, TK TI MODELING HIGH-FREQUENCY VERTICAL DIRECTIONAL SPECTRA SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID AMBIENT NOISE; OCEAN; SURFACE; GENERATION; WATER AB A measurement of the acoustic ambient arriving from a horizontal direction along with total sound-pressure-level spectrum allows one to infer directional spectra and some physical characteristics of sea surface-generated sound. A 1-year measurement of these two quantities was made at high frequency, i.e., 8-32 kHz, in The Tongue of the Ocean, The Bahamas. The horizontally directed ambient was measured using vertically oriented line arrays (broadside beam only available) and was observed at wind speeds ranging from 1-30 kn. The resulting database was used to estimate the statistics of anisotropic "noise gain." The measured statistics showed two distinct cases: whitecaps present and not present. The relationship of these results to the total vertical directional spectrum is investigated by comparisons with a model that includes spatially diffuse near-surface sources, media scattering, and thermal noise. A comparison of the model and experiment results quantified an "effective" thickness of an acoustically active sublayer of monopole sources and a frequency-dependent media smearing of the source-to-receiver ray paths. RP KENNEDY, RM (reprint author), USN,CTR UNDERWATER SYST,DEPT TEST & EVALUAT,W PALM BEACH,FL 33402, USA. NR 29 TC 10 Z9 10 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 1991 VL 89 IS 2 BP 673 EP 681 DI 10.1121/1.1894626 PG 9 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA EX020 UT WOS:A1991EX02000019 ER PT J AU GRAGG, RF PASEWARK, BH AF GRAGG, RF PASEWARK, BH TI STABILIZED HIGH-RESOLUTION BEAMFORMING WITH HORIZONTAL ARRAYS - 2 EXPERIMENTAL TRIALS IN SHALLOW-WATER SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID BEARING AB High-resolution algorithms are potentially able to outperform conventional linear methods at the task of beamforming, i.e., spatial-spectrum estimation, and in controlled experiments or simple computer simulations they often do prove superior. In marine environments, however, high-resolution techniques frequently fall short of these expectations. Their outputs can take on an unstable appearance characterized by fading of the true target peak and by the occurrence of multiple false targets. In recent years a class of stabilization techniques has evolved to moderate these effects by suppressing contributions from the smaller eigenvalues of the cross-spectral density matrix. While such techniques generally produce good results in simulations with the maximum likelihood estimator and even with the more sensitive maximum entropy estimator, they have seen little use on sea data. Here, results are presented of two sea trials of a simple eigenvalue stabilization procedure in a relatively demanding class of environments - shallow water. The technique provided what is considered to be marginal stabilization for the maximum likelihood estimator and none at all for maximum entropy. RP GRAGG, RF (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 14 TC 4 Z9 4 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 1991 VL 89 IS 2 BP 682 EP 690 DI 10.1121/1.1894627 PG 9 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA EX020 UT WOS:A1991EX02000020 ER PT J AU TURL, CW SKAAR, DJ AU, WW AF TURL, CW SKAAR, DJ AU, WW TI THE ECHOLOCATION ABILITY OF THE BELUGA (DELPHINAPTERUS-LEUCAS) TO DETECT TARGETS IN CLUTTER SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID DOLPHIN TURSIOPS-TRUNCATUS; ATLANTIC BOTTLENOSE DOLPHINS AB A beluga (Delphinapterus leucas) was trained to detect different length cylinders in front of a clutter screen at five separation distances. The clutter screen consisted of 300, 5.1-cm-diam cork spheres located behind the targets. The clutter screen was used in two positions: perpendicular to the body axis of the beluga (90-degrees grazing angle) and rotated 22-degrees (68-degrees grazing angle). Five hollow stainless-steel cylinders (3.2-cm-diameter and 0.38-cm wall thickness) of different lengths (14, 10, 7, 5, and 3 cm) were used as targets. Detection data were collected on the beluga's performance as a function of the separation between targets and the clutter screen. The beluga's performance was above 80% correct detection for the 14- and 10-cm cylinders as the separation distance decreased from 10.1 to 5.1 cm for both grazing angles. For all targets except the 3-cm cylinder, the beluga's detection was higher at 0-cm separation than at 2.5-cm separation. The beluga's detection performance was higher at 68-degrees than at 90-degrees grazing angle. The target strength of the cylinders and the clutter screen was measured in peak-to-peak amplitude and the energy of the incident and reflected echoes. For 0-cm target-to-clutter screen separation at 90-degrees grazing angle, the echo-to-reverberation ratio at 50% correct detection was - 1.0 dB, based on the peak-to-peak measurements, and - 5.1 dB based on the energy measurement. The results of this experiment suggest that a beluga can detect targets in 3.6 to 5.4 dB more reverberation than previously reported for a bottlenose dolphin (Tursiops truncatus). C1 SEACO INC,SAN DIEGO,CA 92106. RP TURL, CW (reprint author), USN,CTR OCEAN SYST,HAWAII LAB,KAILUA,HI 96733, USA. NR 17 TC 11 Z9 13 U1 0 U2 6 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 1991 VL 89 IS 2 BP 896 EP 901 DI 10.1121/1.1894651 PG 6 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA EX020 UT WOS:A1991EX02000044 ER PT J AU SARKADY, AA NEUSTADT, HM CHASKELIS, HH AF SARKADY, AA NEUSTADT, HM CHASKELIS, HH TI ESTIMATING RADIATION CONDUCTANCE OF A THICKNESS-DRIVE TRANSDUCER FROM ELECTRICAL DRIVING-POINT ADMITTANCE MEASUREMENTS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB For many thickness-drive transducer applications, it is desirable to have a good estimate of the radiation conductance (or other property based on power output) of the transducer. Generally, however, it is difficult to measure directly transducer power output. It is therefore desirable to have a procedure for estimating radiation conductance from easily measured quantities. The measured quantities used in this paper are electrical admittances at the terminals of the transducer when it is in air, and when in water. The transducer model used to interpret the measured admittance is a lumped-constant equivalent circuit; it has been refined to represent an electrically excited thickness-drive transducer over the frequency range 0.5-40 MHz. Two methods are used to estimate radiation conductance G(rad) (f), and efficiency. One, the general-case method, gives values of G(rad) over a wide range of frequencies, the other gives values of G(rad) only for the special case in which the transducer is at a half-wave resonance. For the general case, a novel procedure, similar to iterative optimization, is used to estimate parameters for the equivalent circuit. Provision is made for estimating a tuning-coil resistance that is frequency dependent. The validity of the two methods is tested by comparing resultant G(rad) (f) values with those measured by the National Institute of Standards and Technology (formerly National Bureau of Standards). The maximum discrepancy at the lowest transducer resonance is approximately 15% for the small number of transducers on which measurements have at present been made. The transducers studied herein have active elements with characteristic impedance much higher than that of water. Polymer-film transducers are not considered. C1 USN,RES LAB,NDE GRP,WASHINGTON,DC 20375. RP SARKADY, AA (reprint author), USN ACAD,DEPT ELECT ENGN,ANNAPOLIS,MD 21402, USA. NR 10 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 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD FEB PY 1991 VL 89 IS 2 BP 917 EP 926 DI 10.1121/1.1894654 PG 10 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA EX020 UT WOS:A1991EX02000047 ER PT J AU NEE, SMF AF NEE, SMF TI ERROR REDUCTIONS FOR A SERIOUS COMPENSATOR IMPERFECTION FOR NULL ELLIPSOMETRY SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION LA English DT Article ID SURFACE-ROUGHNESS; COMPONENTS AB Error equations for angles of polarizers and analyzers are formulated for null ellipsometry with a seriously imperfect compensator. Analytic solutions of ellipsometric errors delta-psi and delta-DELTA for metallic samples show dependence on sin2(delta-tau/2)/cos delta-tau, where delta-tau is the retardation from a quarter-wave. The analytic solutions agree with results both from the direct computer simulation of null ellipsometry and from the numerical solutions for the error equations. Errors for data for a metallic sample agree with those predicted from the analytic solutions, and data after error reductions give accurate estimates for the complex refractive index and the surface roughness. RP NEE, SMF (reprint author), USN,CTR WEAP,DEPT RES,DIV PHYS,CHINA LAKE,CA 93555, USA. NR 10 TC 12 Z9 12 U1 0 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 FEB PY 1991 VL 8 IS 2 BP 314 EP 321 DI 10.1364/JOSAA.8.000314 PG 8 WC Optics SC Optics GA EW646 UT WOS:A1991EW64600011 ER PT J AU DUNCAN, MD MAHON, R TANKERSLEY, LL REINTJES, J AF DUNCAN, MD MAHON, R TANKERSLEY, LL REINTJES, J TI SPECTRAL AND TEMPORAL CHARACTERISTICS OF SPONTANEOUS RAMAN-SCATTERING IN THE TRANSIENT REGIME SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID QUANTUM FLUCTUATIONS; LINEWIDTH AB We demonstrate explicitly that the quantum theories that predict that stimulated Raman scattering is initiated from zero-point fluctuations of either the material oscillators or the electromagnetic field are equivalent and that the process can be viewed as arising from both types of fluctuation. We further demonstrate experimentally that in the transient regime the spontaneous Stokes intensity reproduces the pump in amplitude and phase, as predicted by quantum theory, without any of the integrating effects normally associated with transient processes. C1 JAYCOR,VIENNA,VA 22180. USN ACAD,DEPT PHYS,ANNAPOLIS,MD 21402. RP DUNCAN, MD (reprint author), USN,RES LAB,DIV OPT SCI,LASER PHY BRANCH,CODE 6540,WASHINGTON,DC 20375, USA. NR 14 TC 3 Z9 3 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD FEB PY 1991 VL 8 IS 2 BP 300 EP 310 DI 10.1364/JOSAB.8.000300 PG 11 WC Optics SC Optics GA EW978 UT WOS:A1991EW97800012 ER PT J AU BROOK, I FRAZIER, EH THOMPSON, DH AF BROOK, I FRAZIER, EH THOMPSON, DH TI AEROBIC AND ANAEROBIC MICROBIOLOGY OF ACUTE SUPPURATIVE PAROTITIS SO LARYNGOSCOPE LA English DT Article ID CHILDREN; BACTERIA; ABSCESSES; INFECTION AB Aspirates of pus from acute suppurative parotitis were studied for aerobic and anaerobic bacteria. Bacterial growth was present in 23 specimens. A total of 36 bacterial isolates (20 anaerobic and 16 aerobic and facultative) were recovered, accounting for 1.6 isolates per specimen (0.9 anaerobic and 0.7 aerobic and facultative). Anaerobic bacteria only were present in 10 (43%) patients, aerobic and facultatives in 10 (43%), and mixed aerobic and anaerobic flora in 3 (13%). Single bacterial isolates were recovered in 9 infections, 6 of which were Staphylococcus aureus and 3 were anaerobic bacteria. The predominant bacterial isolates were S. aureus (8 isolates), Bacteroides sp. (6 isolates, including 4 Bacteroides melaninogenicus group), and Peptostreptococcus sp. (5). beta-Lactamase-producing organisms were recovered from 11 (73%) of the 15 specimens tested. This study highlights the polymicrobial nature and importance of anaerobic bacteria in acute suppurative parotitis. C1 USN,MED CTR,DEPT PEDIAT,BETHESDA,MD 20814. USN,MED CTR,DEPT PATHOL,BETHESDA,MD 20814. USN,MED CTR,DEPT OTOLARYNGOL,BETHESDA,MD 20814. NR 23 TC 41 Z9 42 U1 0 U2 0 PU LARYNGOSCOPE CO PI ST LOUIS PA 10 S BROADWAY 14TH FLOOR, ST LOUIS, MO 63102-1741 SN 0023-852X J9 LARYNGOSCOPE JI Laryngoscope PD FEB PY 1991 VL 101 IS 2 BP 170 EP 172 PG 3 WC Medicine, Research & Experimental; Otorhinolaryngology SC Research & Experimental Medicine; Otorhinolaryngology GA EX029 UT WOS:A1991EX02900012 PM 1992268 ER PT J AU MICHAEL, TS AF MICHAEL, TS TI THE STRUCTURE MATRIX AND A GENERALIZATION OF RYSER MAXIMUM TERM RANK FORMULA SO LINEAR ALGEBRA AND ITS APPLICATIONS LA English DT Article RP MICHAEL, TS (reprint author), USN ACAD,DEPT MATH,ANNAPOLIS,MD 21402, USA. NR 8 TC 3 Z9 3 U1 0 U2 1 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 FEB PY 1991 VL 145 BP 21 EP 31 DI 10.1016/0024-3795(91)90285-5 PG 11 WC Mathematics, Applied; Mathematics SC Mathematics GA EM722 UT WOS:A1991EM72200002 ER PT J AU PROKES, SM GORMAN, R LESSOFF, H AF PROKES, SM GORMAN, R LESSOFF, H TI ETCHING STUDIES OF STRESS-INDUCED SURFACE POLYGONIZATION IN SI GAAS WAFERS SO MATERIALS LETTERS LA English DT Article AB Surface etching studies have been performed on Si GaAs wafers grown by liquid encapsulated Czochralski (LEC) and vertical encapsulated zone melting (VZM) techniques. The wafers were sliced, mechanically polished and dipped in a bromine-methanol solution to remove surface damage, which is the standard wafer preparation technique. Surface polygonization has been seen using an eutectic etch in both the LEC and VZM wafers polished in this manner. The polygonized surface "cells' grew in size at higher etching temperatures and/or longer etching times at lower temperatures. If the wafers were dipped for a much longer time in the bromine-methanol solution, it was found that no surface polygonization occurred after the use of the eutectic etch. Thus, we conclude that this polygonization process is driven by relaxation of strain which was introduced in the initial cutting and polishing, and which was not fully relieved by the short bromine-methanol dip. RP PROKES, SM (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 6 TC 1 Z9 1 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-577X J9 MATER LETT JI Mater. Lett. PD FEB PY 1991 VL 10 IS 9-10 BP 400 EP 403 DI 10.1016/0167-577X(91)90227-W PG 4 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA FA687 UT WOS:A1991FA68700002 ER PT J AU MAJDE, JA BROWN, RK JONES, MW DIEFFENBACH, CW MAITRA, N KRUEGER, JM CADY, AB SMITKA, CW MAASSAB, HF AF MAJDE, JA BROWN, RK JONES, MW DIEFFENBACH, CW MAITRA, N KRUEGER, JM CADY, AB SMITKA, CW MAASSAB, HF TI DETECTION OF TOXIC VIRAL-ASSOCIATED DOUBLE-STRANDED-RNA (DSRNA) IN INFLUENZA-INFECTED LUNG SO MICROBIAL PATHOGENESIS LA English DT Article DE INFLUENZA; DSRNA; POLYRIBOINOSINIC ACID-POLYRIBOCYTIDYLIC ACID; INTERFERON; CYTOKINE; PROSTAGLANDIN ID TUMOR-NECROSIS-FACTOR; SLOW-WAVE SLEEP; VIRUS NEURAMINIDASE; HUMAN FIBROBLASTS; MURAMYL PEPTIDES; HUMAN INTERFERON; CELLS; INTERLEUKIN-1; PROTEIN; HEMAGGLUTININ C1 WAYNE STATE UNIV,SCH MED,DEPT BIOCHEM,DETROIT,MI 48201. UNIFORMED SERV UNIV HLTH SCI,DEPT PATHOL,BETHESDA,MD 20814. UNIV TENNESSEE,CTR HLTH SCI,DEPT PHYSIOL & BIOPHYS,MEMPHIS,TN 38163. UNIV MICHIGAN,SCH PUBL HLTH,DEPT EPIDEMIOL,ANN ARBOR,MI 48109. RP MAJDE, JA (reprint author), OFF NAVAL RES,ARLINGTON,VA 22217, USA. NR 52 TC 43 Z9 43 U1 0 U2 0 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0882-4010 J9 MICROB PATHOGENESIS JI Microb. Pathog. PD FEB PY 1991 VL 10 IS 2 BP 105 EP 115 DI 10.1016/0882-4010(91)90071-H PG 11 WC Immunology; Microbiology SC Immunology; Microbiology GA FN888 UT WOS:A1991FN88800003 PM 1890949 ER PT J AU TAIT, GB NEWMAN, HS AF TAIT, GB NEWMAN, HS TI A MICROWAVE EQUIVALENT-CIRCUIT MODEL FOR SEMICONDUCTOR ALLOY RAMP HETEROSTRUCTURE DIODES SO MICROWAVE AND OPTICAL TECHNOLOGY LETTERS LA English DT Article DE HETEROSTRUCTURE DIODE; MICROWAVE IMPEDENCE; EQUIVALENT CIRCUIT MODEL AB The microwave impedance of a current-rectifying Al(x)Ga1-x As ramp heterostructure is measured from 0.1 to 12 GHz over a temperature range of 20 to 300 K. The elements of a small-signal equivalent circuit model are optimized to fit the experimental impedance data over the full temperature and dc bias ranges. These circuit elements are identified with the physical structures and carrier transport mechanisms in the device. RP TAIT, GB (reprint author), USN,RES LAB,DIV ELECTR SCI & TECHNOL,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0895-2477 J9 MICROW OPT TECHN LET JI Microw. Opt. Technol. Lett. PD FEB PY 1991 VL 4 IS 3 BP 91 EP 97 DI 10.1002/mop.4650040302 PG 7 WC Engineering, Electrical & Electronic; Optics SC Engineering; Optics GA FC044 UT WOS:A1991FC04400001 ER PT J AU WHITE, MR MCNALLY, MS AF WHITE, MR MCNALLY, MS TI MORBIDITY AND MORTALITY IN UNITED-STATES-NAVY-PERSONNEL FROM EXPOSURES TO HAZARDOUS MATERIALS, 1974-85 SO MILITARY MEDICINE LA English DT Article AB A total of 1,371 hospitalizations and 136 deaths occurred in U.S. Navy enlisted personnel from 1974 to 1985 as a result of exposures to hazardous materials. Exposures to various gas fumes and vapors accounted for the largest percentage of all hospitalizations (38%), and the second largest percentage of deaths (20.6%). The most frequent cause of death was from carbon monoxide poisoning; nearly 74% of all reported deaths were attributed to this gas. Hospitalization rates were highest among the 17- to 19-year-olds across all race categories. This may be attributed either to their lack of experience and knowledge concerning the safe handling of these materials, or perhaps a disproportionate number of 17- to 19-year-olds are given tasks which put them at higher risk. The Navy occupations showing the highest risk for various exposures to hazardous materials were Utilitiesman, Hull Maintenance Technician, and Boatswain's Mate. It is the inhalation of these compounds which poses the greatest health risk to personnel both onshore and aboard ships. RP WHITE, MR (reprint author), USN,CTR HLTH RES,DEPT OCCUPAT MED,POB 85122,SAN DIEGO,CA 92138, USA. NR 0 TC 4 Z9 4 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 1991 VL 156 IS 2 BP 70 EP 73 PG 4 WC Medicine, General & Internal SC General & Internal Medicine GA EX583 UT WOS:A1991EX58300008 PM 1900592 ER PT J AU HOIBERG, A MCNALLY, MS AF HOIBERG, A MCNALLY, MS TI PROFILING OVERWEIGHT PATIENTS IN THE UNITED-STATES-NAVY - HEALTH CONDITIONS AND COSTS SO MILITARY MEDICINE LA English DT Article AB The U.S.A. has the distinction of being the "fattest" nation in the world, with an estimated 34 million obese citizens. Of grave concern is the reported finding that obesity contributes to 20% of the annual mortality rate, primarily for such conditions as diabetes mellitus, digestive diseases, coronary heart disease, and cerebrovascular disease. In 1982, the Navy initiated the "Health and Physical Readiness Program" in order to establish body fat percentages and physical conditioning standards and to provide Navy personnel with weight reduction and other health promotion programs. Participation in such programs is expected to help overweight personnel solve their weight problems and reduce the risks of obesity-related conditions. The purpose of this study was (1) to identify the health conditions recorded in a sample of U.S. Navy enlisted men who had been diagnosed as obese during one or more of their admissions to a Naval hospital from 1974 through 1984, (2) to determine whether these disorders correspond with those reported in the scientific literature, and (3) to examine the obesity-related costs in terms of numbers of days hospitalized and career outcome. The patient population consisted of 518 U.S. Navy enlisted men who were given a primary diagnosis of obesity and 1,092 who received a secondary or additional diagnosis of obesity on at least one of their inpatient medical records between 1974 and 1984. A 10% sample of Navy male patients, all of whom had not been diagnosed as obese, was selected as a comparison group (n = 30,829). All diagnoses (ICD-9) for each hospitalization were included in the data compilations; however, each unique diagnosis was only counted once. Frequency and percentage distributions were compiled for each of the two samples and by age interval (20 to 29 years, 30 to 39 years, and older than 40 years) for the 16 major diagnostic categories and several specific diagnoses as well as numbers of days hospitalized and type of Navy separation. Univariate analyses were conducted to establish whether hospitalized obese men accounted for significantly higher mean numbers of days hospitalized or percentages of disability separations than controls. Almost one-third of the obese sample was hospitalized with a primary diagnosis of obesity, which accounted for more than 10,000 days hospitalized. Other specific disorders that represented a large proportion of all health problems among obese patients at all ages included hypertension, diabetes mellitus, gout, respiratory symptoms, and gallbladder disorders as well as chronic ischemic heart disease beginning at age 30. Also noteworthy was the high percentage among the overweight of hospitalizations for alcoholism, their second-ranked condition, which is the leading health problem in the control sample. In both samples, alcoholism was listed in the top four specific diagnoses for each age interval and accounted for 10.0% of all days hospitalized. Obese patients had a significantly higher overall mean number of days hospitalized than controls. Other findings showed that obese patients had relatively high percentages of physical disabilities, primarily for diabetes mellitus, chronic ischemic heart disease, and hypertension. The conditions reported in the scientific literature as obesity-related were identical to those noted among obese patients in this study. The relatively high percentage (almost 10%) of 20- to 29-year-old obese patients diagnosed with gout, hypertension, gallbladder disorders, and diabetes mellitus suggests that efforts should be made to initiate prevention and weight reduction programs for men in their 20s. Also, the percentage of hospitalizations for chronic heart disease among 30- to 39-year-old obese patients was quite high, which corresponded with other research reporting that obesity predisposes to premature coronary heart disease. Results of this study support the implementation of the weight-reduction programs that were developed as part of the "Health and Physical Readiness Program." The timing of assigning individuals to such programs is of importance-before any adverse health effects are manifest. In assigning overweight individuals to a weight-reduction program at an early phase of the excess weight condition, therefore, it seems likely that the incidence of obesity-related conditions will decrease as will the overall costs of inpatient care and disability separations. RP HOIBERG, A (reprint author), USN,CTR HLTH RES,POB 85122,SAN DIEGO,CA 92138, USA. NR 0 TC 12 Z9 12 U1 0 U2 2 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 1991 VL 156 IS 2 BP 76 EP 82 PG 7 WC Medicine, General & Internal SC General & Internal Medicine GA EX583 UT WOS:A1991EX58300010 PM 1900594 ER PT J AU MACE, NA AF MACE, NA TI FIELDING,HENRY CLASSICAL LEARNING SO MODERN PHILOLOGY LA English DT Article RP MACE, NA (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 31 TC 1 Z9 1 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0026-8232 J9 MOD PHILOLOGY JI Mod. Philol. PD FEB PY 1991 VL 88 IS 3 BP 243 EP 260 DI 10.1086/391863 PG 18 WC Language & Linguistics; Literature SC Linguistics; Literature GA EX594 UT WOS:A1991EX59400002 ER PT J AU CATRON, PW DUTKA, AJ BIONDI, DM FLYNN, ET HALLENBECK, JM AF CATRON, PW DUTKA, AJ BIONDI, DM FLYNN, ET HALLENBECK, JM TI CEREBRAL AIR-EMBOLISM TREATED BY PRESSURE AND HYPERBARIC-OXYGEN SO NEUROLOGY LA English DT Note C1 NATL NAVAL MED CTR, DEPT NEUROL, BETHESDA, MD 20814 USA. USN, MED RES INST, DEPT DIVING MED, BETHESDA, MD 20814 USA. NR 9 TC 15 Z9 15 U1 0 U2 0 PU LITTLE BROWN CO PI BOSTON PA 34 BEACON STREET, BOSTON, MA 02108-1493 SN 0028-3878 J9 NEUROLOGY JI Neurology PD FEB PY 1991 VL 41 IS 2 BP 314 EP 315 PN 1 PG 2 WC Clinical Neurology SC Neurosciences & Neurology GA EX218 UT WOS:A1991EX21800033 PM 1992383 ER PT J AU OSTERBERG, U LAWCONNELL, RI BRAMBANI, LA ASKINS, CG FRIEBELE, EJ AF OSTERBERG, U LAWCONNELL, RI BRAMBANI, LA ASKINS, CG FRIEBELE, EJ TI MODAL EVOLUTION OF INDUCED 2ND-HARMONIC LIGHT IN AN OPTICAL FIBER SO OPTICS LETTERS LA English DT Article ID GENERATION AB We show how the mode of the photoinduced second-harmonic light in an optical fiber changes with preparation time. We also discuss what type of nonlinear interaction can be causing the induced second-harmonic light and give experimental evidence that the initial second-harmonic light is a core-cladding interface effect. C1 USN,RES LAB,WASHINGTON,DC 20375. DARTMOUTH COLL,THAYER SCH ENGN,HANOVER,NH 03755. RP OSTERBERG, U (reprint author), USAF ACAD,FJ SEILER RES LAB,COLORADO SPRINGS,CO 80840, USA. NR 7 TC 6 Z9 6 U1 0 U2 0 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 1 PY 1991 VL 16 IS 3 BP 132 EP 134 DI 10.1364/OL.16.000132 PG 3 WC Optics SC Optics GA EV197 UT WOS:A1991EV19700006 PM 19773859 ER PT J AU SIMMONS, KD LAROCHELLE, S MIZRAHI, V STEGEMAN, GI GRISCOM, DL AF SIMMONS, KD LAROCHELLE, S MIZRAHI, V STEGEMAN, GI GRISCOM, DL TI CORRELATION OF DEFECT CENTERS WITH A WAVELENGTH-DEPENDENT PHOTOSENSITIVE RESPONSE IN GERMANIA-DOPED SILICA OPTICAL FIBERS SO OPTICS LETTERS LA English DT Article AB We demonstrate a similar wavelength-dependent response for both the generation of Ge E' centers and the formation of photosensitive gratings in germania-doped silica fibers. This supports a model for the grating formation whereby two-photon absorption of laser radiation into the UV bleachable absorption band of an oxygen-deficient germania site creates hole traps, modeled as Ge E' centers, which are detectable with electron spin reasonance spectroscopy. C1 USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375. RP SIMMONS, KD (reprint author), UNIV ARIZONA,CTR OPT SCI,TUCSON,AZ 85721, USA. NR 12 TC 77 Z9 77 U1 0 U2 2 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 1 PY 1991 VL 16 IS 3 BP 141 EP 143 DI 10.1364/OL.16.000141 PG 3 WC Optics SC Optics GA EV197 UT WOS:A1991EV19700009 PM 19773862 ER PT J AU FOSS, RD WARNOCK, GR CLARK, WB GRAHAM, SJ MORTON, AL YUNAN, ES AF FOSS, RD WARNOCK, GR CLARK, WB GRAHAM, SJ MORTON, AL YUNAN, ES TI MALIGNANT CYST OF THE LATERAL ASPECT OF THE NECK - BRANCHIAL CLEFT CARCINOMA OR METASTASIS SO ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTICS LA English DT Note ID BRANCHIOGENIC CARCINOMA AB A 58-year-old man had a left jugulodigastric mass, which was found to be cystic by computed tomography, and no evidence of other lesions. Grossly and histologically, the surgical specimen consisted of a thin-walled, fluid-filled cyst lined by squamous epithelium that varied in appearance from benign to invasive squamous cell carcinoma. The findings supported a differential diagnosis of branchial cleft carcinoma (BCCA) versus cystic growth of a lymph node metastasis from an occult malignancy. On this basis, guided biopsies of the upper aerodigestive tract were performed, with strong suspicion of a tonsillar bed lesion. Microscopic examination revealed the primary tumor within tissue excised from the left tonsillar fossa. Comparison of the current case with cases of BCCA and cystic tonsillar metastases from the literature illustrated the potential pitfalls in rendering a diagnosis of BCCA. Recognition of this lesion as a distinctive clinical variant of oropharyngeal carcinoma is warranted. C1 NATL NAVAL DENT CTR, NAVAL DENT SCH, DEPT ORAL PATHOL, BETHESDA, MD 20814 USA. NAVAL HOSP, OTOLARYNGOL HEAD & NECK SURG, ORLANDO, FL USA. NATL NAVAL MED CTR, ANAT PATHOL, BETHESDA, MD 20814 USA. NATL NAVAL MED CTR, OTOLARYNGOL HEAD & NECK SURG, BETHESDA, MD 20814 USA. NR 16 TC 21 Z9 21 U1 0 U2 1 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 1079-2104 J9 ORAL SURG ORAL MED O JI Oral Surg. Oral Med. Oral Pathol. Oral Radiol. Endod. PD FEB PY 1991 VL 71 IS 2 BP 214 EP 217 DI 10.1016/0030-4220(91)90472-O PG 4 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA EX602 UT WOS:A1991EX60200019 PM 1706082 ER PT J AU COHEN, DA AF COHEN, DA TI SHORTENED ROOTS IN THE MAXILLA AND MANDIBLE SO ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTICS LA English DT Note RP COHEN, DA (reprint author), NAVAL HOSP,DEPT DENT,JACKSONVILLE,FL 32214, USA. NR 3 TC 2 Z9 2 U1 0 U2 0 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 1079-2104 J9 ORAL SURG ORAL MED O JI Oral Surg. Oral Med. Oral Pathol. Oral Radiol. Endod. PD FEB PY 1991 VL 71 IS 2 BP 252 EP 252 DI 10.1016/0030-4220(91)90480-Z PG 1 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA EX602 UT WOS:A1991EX60200027 PM 2003023 ER PT J AU DAVIS, ET ALLARD, T AF DAVIS, ET ALLARD, T TI EFFECTS OF STIMULUS CONTEXT ON MAGNITUDE ESTIMATIONS AND CATEGORY RATINGS OF PERCEIVED LOUDNESS - THE SPACING OF INTENSITY INTERVALS SO PERCEPTUAL AND MOTOR SKILLS LA English DT Article ID PSYCHOPHYSICAL MEASUREMENT; ABSOLUTE IDENTIFICATION; SPATIAL-FREQUENCY; CONTRAST; UNCERTAINTY; PERCEPTION; JUDGMENTS; SCALES; RANGE C1 OFF NAVAL RES,ARLINGTON,VA 22217. RP DAVIS, ET (reprint author), GEORGIA INST TECHNOL,SCH PSYCHOL,ATLANTA,GA 30332, USA. NR 31 TC 0 Z9 0 U1 0 U2 0 PU PERCEPTUAL MOTOR SKILLS PI MISSOULA PA PO BOX 9229, MISSOULA, MT 59807 SN 0031-5125 J9 PERCEPT MOTOR SKILL JI Percept. Mot. Skills PD FEB PY 1991 VL 72 IS 1 BP 227 EP 242 DI 10.2466/PMS.72.1.227-242 PG 16 WC Psychology, Experimental SC Psychology GA FD072 UT WOS:A1991FD07200043 PM 2038517 ER PT J AU PICKETT, WE COHEN, RE KRAKAUER, H AF PICKETT, WE COHEN, RE KRAKAUER, H TI ELECTRONIC-STRUCTURE AND ELECTRON-PHONON COUPLING IN LAYERED COPPER-OXIDE SUPERCONDUCTORS SO PHYSICA B LA English DT Article; Proceedings Paper CT 19TH INTERNATIONAL CONF ON LOW TEMPERATURE PHYSICS ( LT-19 ) CY AUG 16-22, 1990 CL BRIGHTON, ENGLAND SP INT UNION PURE & APPL PHYS, OXFORD INSTRUMENTS, ELSEVIER NORTH HOLLAND PUBL, UNIV SUSSEX, INST PHYS, USAF, GEC ID ANGLE-RESOLVED PHOTOEMISSION; HIGH-TEMPERATURE SUPERCONDUCTORS; HIGH-TC SUPERCONDUCTIVITY; TRANSPORT-PROPERTIES; PHASE-TRANSITIONS; NORMAL-STATE; LA2-XBAXCUO4; YBA2CU3O7; LA2CUO4; CRYSTAL AB Experimental data on the layered Cu-O superconductors seem more and more to reflect normal Fermi-liquid behavior and substantial correspondence with band structure predictions. Recent self-consistent, microscopic band theoretic calculations of the electronic structure, lattice instabilities, phonon frequencies, and electron-phonon coupling characteristics and strength for La2CuO4 and YBa2Cu3O7 are reviewed. A dominant feature of the coupling is a novel Madelung-like contribution which would be screened out in high density of states superconductors but survives in cuprates because of weak screening. Local density functional theory correctly predicts the instability of (La, Ba)2CuO4 to both the low-temperature orthorhombic phase (below room temperature) and the lower-temperature tetragonal phase (below 50 K). C1 COLL WILLIAM & MARY,DEPT PHYS,WILLIAMSBURG,VA 23185. RP PICKETT, WE (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. RI Cohen, Ronald/B-3784-2010; OI Cohen, Ronald/0000-0001-5871-2359; Krakauer, Henry/0000-0003-2517-0957 NR 29 TC 11 Z9 11 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD FEB PY 1991 VL 169 IS 1-4 BP 45 EP 50 DI 10.1016/0921-4526(91)90206-T PG 6 WC Physics, Condensed Matter SC Physics GA FL630 UT WOS:A1991FL63000010 ER PT J AU WOOD, KS LOVELLETTE, MM VANVECHTEN, D AF WOOD, KS LOVELLETTE, MM VANVECHTEN, D TI FINITE ELECTRON RANGE AND ITS IMPLICATIONS FOR SUPERCONDUCTING PHOTON DETECTORS SO PHYSICA B LA English DT Article; Proceedings Paper CT 19TH INTERNATIONAL CONF ON LOW TEMPERATURE PHYSICS ( LT-19 ) CY AUG 16-22, 1990 CL BRIGHTON, ENGLAND SP INT UNION PURE & APPL PHYS, OXFORD INSTRUMENTS, ELSEVIER NORTH HOLLAND PUBL, UNIV SUSSEX, INST PHYS, USAF, GEC AB We consider global transitions from superconducting to normal state of small grains induced by the absorption of energetic (1- 100 keV) photons. Initially the energy is transferred to a single photoelectron, which loses the energy as it scatters inelastically. To measure the energy of the photon, this collision cascade must be contained within the grain. Reconciling this requirement with the requirement that the dispersed energy must suffice to warm the grain above the transition temperature, leads to estimates of grain sizes and effective operating range of photon energies for various materials and T and H biasing conditions. RP WOOD, KS (reprint author), USN,RES LAB,CODE 4120,WASHINGTON,DC 20375, USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD FEB PY 1991 VL 169 IS 1-4 BP 439 EP 440 DI 10.1016/0921-4526(91)90265-G PG 2 WC Physics, Condensed Matter SC Physics GA FL630 UT WOS:A1991FL63000069 ER PT J AU BROUSSARD, PR AF BROUSSARD, PR TI BOUNDARY-CONDITION EFFECTS ON THE SUPERCONDUCTING TRANSITION-TEMPERATURE OF PROXIMITY-EFFECT SYSTEMS SO PHYSICAL REVIEW B LA English DT Article ID NIOBIUM-ZIRCONIUM MULTILAYERS; SUPERLATTICES; HEAT AB The superconducting critical temperature, T(c), of different configurations of layers is studied under the de Gennes-Werthamer model. Certain inconsistencies are seen to develop with the use of this approach, calling into question previous results obtained. Preliminary results on Nb/Zr layered structures are also presented. RP BROUSSARD, PR (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 9 TC 16 Z9 16 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 FEB 1 PY 1991 VL 43 IS 4 BP 2783 EP 2787 DI 10.1103/PhysRevB.43.2783 PN A PG 5 WC Physics, Condensed Matter SC Physics GA FF083 UT WOS:A1991FF08300041 ER PT J AU JULIEN, JP PAPACONSTANTOPOULOS, DA CYROTLACKMANN, F PASTUREL, A AF JULIEN, JP PAPACONSTANTOPOULOS, DA CYROTLACKMANN, F PASTUREL, A TI CALCULATIONS OF THE ELECTRONIC-STRUCTURE AND SUPERCONDUCTING PROPERTIES OF BAPB1-XSBXO3 SO PHYSICAL REVIEW B LA English DT Article ID SYSTEM AB We have performed a band-structure calculation of the cubic perovskite compound BaSbO3 by the augmented-plane-wave method. Using these results we have constructed an accurate tight-binding Hamiltonian which we used to calculate the density of states of the alloy BaPb0.75Sb0.25O3 by the coherent-potential approximation. We have also calculated the electron-phonon coupling and found that such coupling can explain the low transition temperature T(c) of this alloy system and the higher T(c) for the Bi-doped alloy. A prediction is made for a much higher transition temperature for Sb- or Bi-rich alloys. C1 USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375. RP JULIEN, JP (reprint author), CTR RECH SCI,ETUD PROPRIETES ELECTR SOLIDES LAB,25 AVE MARTYRS,BOITE POSTALE 166,F-38042 GRENOBLE,FRANCE. NR 11 TC 9 Z9 9 U1 0 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 1991 VL 43 IS 4 BP 2903 EP 2909 DI 10.1103/PhysRevB.43.2903 PN A PG 7 WC Physics, Condensed Matter SC Physics GA FF083 UT WOS:A1991FF08300055 ER PT J AU AGASSI, D KASOWSKI, RV AF AGASSI, D KASOWSKI, RV TI ELECTRONIC-STRUCTURE OF TWIN BOUNDARIES IN YBA2CU3O7 SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TC SUPERCONDUCTORS; UPPER CRITICAL-FIELD; OXIDE SUPERCONDUCTORS; SINGLE-CRYSTALS; TEMPERATURE; MIGRATION; PURE AB The electronic structure of a twin boundary (TB) in YBa2Cu3O7 is evaluated from ab initio band-structure calculations. Two models are considered: The first assumes the ideal TB atomic configuration. The oxygen-disordered TB model, on the other hand, assumes that in proximity to the TB the oxygen atoms relocate randomly to vacant lattice sites such that the Cu-O bond length is preserved. The calculations have been carried out using 52-atom and 78-atom supercells. For the ideal TB model, the TB presence gives rise to a quasicontinuum of localized states near E(F). These states do not contribute to the conductivity. For the oxygen-disordered TB model, two representative oxygen dislocations are considered: One in which a chain oxygen [O(1)] is displaced in the basal plane, and the other in which a Cu-plane oxygen [O(2), O(3)] is up-displaced into the yttrium plane. For both configurations we find conductive pathways with energy near E(F). These pathways are comprised of zigzag Cu-O chains, oriented in all directions parallel to the TB plane. This model implies, in particular, percolative conduction in the c-axis direction parallel to the TB planes. C1 DUPONT CO,EXPTL STN,WILMINGTON,DE 19898. RP AGASSI, D (reprint author), USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903, USA. NR 37 TC 6 Z9 6 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1991 VL 43 IS 4 BP 3055 EP 3064 DI 10.1103/PhysRevB.43.3055 PN A PG 10 WC Physics, Condensed Matter SC Physics GA FF083 UT WOS:A1991FF08300074 ER PT J AU HARTMANN, B LEE, GF AF HARTMANN, B LEE, GF TI TENSILE YIELD IN POLY(CHLOROTRIFLUOROETHYLENE) AND POLY(VINYLIDENE FLUORIDE) SO POLYMER ENGINEERING AND SCIENCE LA English DT Article ID CRYSTALLINE POLYMERS; GLASSY POLYMERS; EQUATION; STATE AB Uniaxial tension tests to the yield point were performed on poly(chlorotrifluoroethylene) (PCTFE) and poly(vinylidene fluoride) (PVF2) from room temperature to near the melting point at a strain rate of 2 min-1. At room temperature and at least two elevated temperatures, measurements were also made at strain rates from 0.02 to 8 min-1. The properties of these polymers were found to be similar to those of other semicrystalline polymers. In the absence of other transitions, yield energy was found to be a linear function of temperature extrapolating to zero near the melting temperature. The ratio of thermal to mechanical energy to produce yielding is smaller than for glassy polymers. Yield stress is a linear function of log strain rate. The ratio of yield stress to (initial) Young's modulus is about 0.03 at room temperature for both polymers. Yield stress is a linear function of unstrained volume. Yield strain, elastic, and plastic strain all initially increase with temperature, but PCTFE shows a decrease with temperature starting at about 100-degrees-C, thus behaving like a glassy amorphous polymer in this region. RP HARTMANN, B (reprint author), USN,CTR SURFACE WARFARE,POLYMER PHYS GRP,SILVER SPRING,MD 20903, USA. NR 24 TC 9 Z9 9 U1 1 U2 2 PU SOC PLASTICS ENG INC PI BROOKFIELD CENTER PA 14 FAIRFIELD DR, BROOKFIELD CENTER, CT 06804-0403 SN 0032-3888 J9 POLYM ENG SCI JI Polym. Eng. Sci. PD FEB PY 1991 VL 31 IS 4 BP 231 EP 238 DI 10.1002/pen.760310405 PG 8 WC Engineering, Chemical; Polymer Science SC Engineering; Polymer Science GA EZ396 UT WOS:A1991EZ39600004 ER PT J AU BEGLEY, CG VISVADER, J GREEN, AR APLAN, PD METCALF, D KIRSCH, IR GOUGH, NM AF BEGLEY, CG VISVADER, J GREEN, AR APLAN, PD METCALF, D KIRSCH, IR GOUGH, NM TI MOLECULAR-CLONING AND CHROMOSOMAL LOCALIZATION OF THE MURINE HOMOLOG OF THE HUMAN HELIX-LOOP-HELIX GENE SCL SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE HEMATOPOIESIS; ONCOGENE; TRANSCRIPTION FACTOR; GENETIC LINKAGE; RECOMBINANT-INBRED STRAINS ID DNA-BINDING MOTIF; T-CELL LEUKEMIA; IMMUNOGLOBULIN ENHANCERS; TRANSLOCATION; SEQUENCE; MYC; PROTEINS; REGION; MYOD; LINE AB The human SCL gene is a member of the family of genes that encode the helix-loop-helix (HLH) class of DNA-binding proteins. A murine SCL cDNA was isolated from a normal macrophage cDNA library by using HLH-specific oligonucleotides as hybridization probes. The coding region is 987 base pairs and encodes a predicted protein of 34 kDa. The nucleotide sequence of the coding region shows 88% identity to the human SCL gene, and the amino acid sequence is 94% identical. The HLH motif and upstream hydrophilic region are entirely conserved in the murine and human proteins. The identity between the mouse and human sequences was less marked in the 5' and 3' untranslated regions. Two murine SCL transcripts that differ in the 3' noncoding region have been detected in fetal liver and various cell lines. Variation was also observed in the 5' untranslated region. Interestingly, immediately downstream of the protein-termination codon, both the human SCL sequence and the murine homolog share an E-box element-the suggested target site for DNA binding of HLH proteins. The murine SCL homolog was mapped to the central part of chromosomes 4. C1 ROYAL MELBOURNE HOSP,DEPT DIAGNOST HAEMATOL,PARKVILLE,VIC 3050,AUSTRALIA. USN,MED BRANCH,BETHESDA,MD 20814. NCI,PEDIAT ONCOL BRANCH,BETHESDA,MD 20814. RP BEGLEY, CG (reprint author), ROYAL MELBOURNE HOSP,WALTER & ELIZA HALL INST MED RES,PARKVILLE,VIC 3050,AUSTRALIA. RI Aplan, Peter/K-9064-2016 NR 39 TC 87 Z9 89 U1 0 U2 0 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 PY 1991 VL 88 IS 3 BP 869 EP 873 DI 10.1073/pnas.88.3.869 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA EW400 UT WOS:A1991EW40000039 PM 1704135 ER PT J AU WEINSTEIN, EA BURNHAM, DL AF WEINSTEIN, EA BURNHAM, DL TI REDUPLICATION AND THE SYNDROME OF CAPGRAS SO PSYCHIATRY-INTERPERSONAL AND BIOLOGICAL PROCESSES LA English DT Article ID MISIDENTIFICATION; PARAMNESIA AB THE CONCEPT of reduplication has done much to break down the traditional barriers between behavioral neurology and psychiatry, and to provide a common theme for the study of the delusional misidentification syndromes. This paper describes the features of reduplication that occur in neurological patients, considers their selective and symbolic aspects, their relationship to other disturbances of behavior and to alterations in brain function, and indicates their applicability to the illusion of doubles first described by Joseph Marie Capgras. C1 USN,BETHESDA HOSP,BETHESDA,MD 20814. NIA,NEUROSCI LAB,BETHESDA,MD 20892. NR 62 TC 29 Z9 29 U1 0 U2 0 PU GUILFORD PUBLICATIONS INC PI NEW YORK PA 72 SPRING STREET, NEW YORK, NY 10012 SN 0033-2747 J9 PSYCHIATRY JI Psychiatry-Interpers. Biol. Process. PD FEB PY 1991 VL 54 IS 1 BP 78 EP 88 PG 11 WC Psychiatry SC Psychiatry GA FG588 UT WOS:A1991FG58800009 PM 2023976 ER PT J AU WEIDMAN, DJ RHEE, MJ SCHNEIDER, RF AF WEIDMAN, DJ RHEE, MJ SCHNEIDER, RF TI TIME-RESOLVING ELECTRON-ENERGY SPECTROMETER SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Note AB A compact, time-resolving, electron energy spectrometer, which measures the temporal energy behavior of a pulsed relativistic electron beam, is described. It is shown that typical experimental results obtained with an approximately 700-keV, 100-ns electron beam are qualitatively in excellent agreement with the diode voltage waveform. C1 ADV TECHNOL & RES INC,LAUREL,MD 20707. RP WEIDMAN, DJ (reprint author), USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903, USA. NR 4 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 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD FEB PY 1991 VL 62 IS 2 BP 548 EP 549 DI 10.1063/1.1142107 PG 2 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA EW414 UT WOS:A1991EW41400046 ER PT J AU GRATE, JW ABRAHAM, MH AF GRATE, JW ABRAHAM, MH TI SOLUBILITY INTERACTIONS AND THE DESIGN OF CHEMICALLY SELECTIVE SORBENT COATINGS FOR CHEMICAL SENSORS AND ARRAYS SO SENSORS AND ACTUATORS B-CHEMICAL LA English DT Review ID PATTERN-RECOGNITION TECHNIQUES; THERMODYNAMICALLY-BASED SCALE; LINEAR DISCRIMINANT FUNCTIONS; SEMICONDUCTOR GAS SENSORS; HYDROGEN-BOND BASICITY; ACOUSTIC-WAVE DEVICES; LOG K-VALUES; PIEZOELECTRIC CRYSTAL; QUARTZ CRYSTAL; PARTITION-COEFFICIENTS AB A continual challenge in the field of chemical detection is the development of approaches to designing microsensors and microsensor-based detectors with high selectivity. No single science exists to unite all sensor technologies with a common set of principles and a common approach to achieving selectivity. Nevertheless, in the area of vapor detection, sorption phenomena and solubility interactions can be identified as common features of many sensors. In designing microsensors for vapor detection, interactive coating materials must be chosen that will collect and concentrate analyte molecules at the sensor's surface. The sensitivity and selectivity of each individual sensor is controlled by tailoring the chemical and physical properties of the coating material to maximize particular solubility interactions. The selection of coatings for the complete sensor array is logically made through a systematic variation of the solubility properties of the coating materials, so that each sensor is selective for a different balance of solubility interactions. This account discusses solubility in great detail. Parameters and methodologies for characterizing analyte solubility properties, sensor coating material solubility properties, and their interactions are presented. Specific functional groups are recommended for inclusion in sensor coating materials in order to maximize particular interactions. In addition, the treatment of coating material properties is integrated with consideration of the factors that influence chemical selectivity in sensor arrays. Methods for choosing coatings intelligently for sensor arrays, and for optimizing sensor arrays for particular analytes are considered. C1 UNIV LONDON UNIV COLL, DEPT CHEM, LONDON WC1H 0AJ, ENGLAND. RP USN, RES LAB, DIV CHEM, SURFACE CHEM BRANCH, WASHINGTON, DC 20375 USA. NR 99 TC 333 Z9 334 U1 2 U2 35 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-4005 J9 SENSOR ACTUAT B-CHEM JI Sens. Actuator B-Chem. PD FEB PY 1991 VL 3 IS 2 BP 85 EP 111 DI 10.1016/0925-4005(91)80202-U PG 27 WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation SC Chemistry; Electrochemistry; Instruments & Instrumentation GA FZ920 UT WOS:A1991FZ92000001 ER PT J AU CHAKRABARTI, K MATHUR, VK SUMMERS, GP AF CHAKRABARTI, K MATHUR, VK SUMMERS, GP TI OPTICALLY AND THERMALLY STIMULATED LUMINESCENCE IN MGO SO SOLID STATE COMMUNICATIONS LA English DT Article ID THERMOCHEMICALLY REDUCED MGO; SINGLE-CRYSTALS AB Following illumination with 250 nm light, samples of neutron irradiated and thermochemically reduced MgO emit either green luminescence (almost-equal-to 540 nm), when heated above room temperature, or blue luminescence (almost-equal-to 400 nm), when stimulated with 1064 nm light form a Nd: YAG laser. The luminescence mechanisms appears to involve F-type centers and traps such as Fe. C1 USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903. USN,RES LAB,WASHINGTON,DC 20375. UNIV MARYLAND,DEPT PHYS,CATONSVILLE,MD 21228. NR 10 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 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD FEB PY 1991 VL 77 IS 6 BP 481 EP 483 DI 10.1016/0038-1098(91)90241-M PG 3 WC Physics, Condensed Matter SC Physics GA EX530 UT WOS:A1991EX53000018 ER PT J AU RAJAGOPAL, AK DIVAKARAN, PP AF RAJAGOPAL, AK DIVAKARAN, PP TI QUANTUM TRANSLATION-INVARIANCE AND THE SUPERCONDUCTING TRANSITION IN LAYERED BULK MATERIALS SO SOLID STATE COMMUNICATIONS LA English DT Article ID FRACTIONAL-STATISTICS AB In bulk materials with a layer structure, the Lie algebra of momenta in the layer has an arbitrary real central charge, alpha, associated with projective realisations of translation invariance. The 1-particle energy eigenstates are then Landau orbits in the layers, propagating freely in the perpendicular direction. For large enough alpha, "Cooper pairs" of such Landau orbits can give rise to bulk superconductivity, with a transition temperature higher than for vanishing central charge (plane waves). C1 TATA INST FUNDAMENTAL RES,BOMBAY 400005,INDIA. RP RAJAGOPAL, AK (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 25 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 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD FEB PY 1991 VL 77 IS 7 BP 525 EP 528 DI 10.1016/0038-1098(91)90733-C PG 4 WC Physics, Condensed Matter SC Physics GA EY143 UT WOS:A1991EY14300009 ER PT J AU BROOK, I FRAZIER, EH THOMAS, RL AF BROOK, I FRAZIER, EH THOMAS, RL TI AEROBIC AND ANAEROBIC MICROBIOLOGIC FACTORS AND RECOVERY OF BETA-LACTAMASE PRODUCING BACTERIA FROM OBSTETRIC AND GYNECOLOGIC INFECTION SO SURGERY GYNECOLOGY & OBSTETRICS LA English DT Article ID PELVIC INFLAMMATORY DISEASE; HEMOLYTIC STREPTOCOCCI; RECURRENT TONSILLITIS; BACTEROIDES-FRAGILIS; INVITRO PROTECTION; PENICILLIN; CEPHALOTHIN; AMPICILLIN; ABSCESSES; CHILDREN AB Specimens obtained from 736 patients with obstetric and gynecologic infections were studied for aerobic and anaerobic bacteria. Bacterial growth was present in 714 specimens. These included 53 specimens of infected fallopian tubes, 470 of infected endometrium, 94 of infected amniotic fluid, 57 of aspirates of cul-de-sacs in instances of pelvic inflammatory disease, 14 labial and vaginal abscesses and 26 of Bartholyn's cyst abscess. A total of 2,052 isolates (2.9 per specimen), 1,139 anaerobes (1.6 per specimen) and 913 aerobic or facultative (1.3 per specimen) were recovered. The most commonly isolated anaerobic bacteria was Bacteroides species (566 isolates), which included Bacteroides bivius (151), Bacteroides fragilis group (130), Bacteroides melaninogenicus group (110) and Bacteroides ureolyticus (47). Others included an anaerobic gram-positive cocci (391), Clostridium species (48) and Fusobacterium species (36). The most frequently recovered aerobic and facultative bacteria were Lactobacillus species (169), Escherichia coli (85), Neisseria gonorrhoeae (62), Staphylococcus aureus (59) and Group B streptococcus (55). Three hundred and sixty-five (18 per cent) of the isolates recovered from 276 (39 per cent) patients were beta-lactamase producing organisms (BLPO); 222 (61 per cent) anaerobes and 143 (39 per cent) aerobes or facultatives. The most common BLPO were B. fragilis group, B. bivius, B. melaninogenicus, B. disiens, Enterobacteriaceae and S. aureus. These data illustrate the polymicrobial nature and important role of BLPO in obstetric and gynecologic infection. C1 USN HOSP,DEPT PEDIAT INFECT DIS,BETHESDA,MD 20814. USN HOSP,DEPT OBSTET & GYNECOL,BETHESDA,MD 20814. NR 33 TC 12 Z9 12 U1 0 U2 0 PU FRANKLIN H MARTIN FOUNDATION PI CHICAGO PA 55 E ERIE ST, CHICAGO, IL 60611 SN 0039-6087 J9 SURG GYNECOL OBSTET JI Surg. Gynecol. Obstet. PD FEB PY 1991 VL 172 IS 2 BP 138 EP 144 PG 7 WC Obstetrics & Gynecology; Surgery SC Obstetrics & Gynecology; Surgery GA EV611 UT WOS:A1991EV61100009 PM 1989117 ER PT J AU LEFORT, JP MAX, MD AF LEFORT, JP MAX, MD TI IS THERE AN ARCHEAN CRUST BENEATH CHESAPEAKE BAY SO TECTONICS LA English DT Article ID SOUTHERN APPALACHIANS; UNITED-STATES; SLATE BELT; PIEDMONT; CAROLINA; TECTONICS; MODEL; ZONE AB A crescent-shaped terrane of continental crust centered on Chesapeake Bay is interpreted as being a collisional relic of Archean crust that was probably accreted during late Hercynian times. Arcuate gravity and magnetic anomalies, which represent the possible suture, separate Avalonian-Carolinian terranes from what seems to be African-like rocks seen in boreholes in the east Chesapeake Bay region. Seismic and heat flow data also suggest an important lithological variation in basement type across the suture. C1 USN,RES LAB,WASHINGTON,DC 20375. RP LEFORT, JP (reprint author), CTR AMORICAIN ETUD STRUCT SOCLES,INST GEOL,CAMPUS RENNES BEAULIEU,F-35042 RENNES,FRANCE. NR 65 TC 11 Z9 11 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0278-7407 J9 TECTONICS JI Tectonics PD FEB PY 1991 VL 10 IS 1 BP 213 EP 226 DI 10.1029/90TC00911 PG 14 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA EW769 UT WOS:A1991EW76900011 ER PT J AU MILLER, JB AF MILLER, JB TI TECHNIQUES FOR NMR IMAGING OF SOLIDS SO TRAC-TRENDS IN ANALYTICAL CHEMISTRY LA English DT Article ID HIGH-RESOLUTION NMR; CHEMICAL-SHIFT; RESONANCE; IMAGES; STATE; EXCITATION; SEQUENCES; SLICE AB This article presents a review of techniques for NMR imaging of solids. The techniques are grouped according to whether they improve spatial resolution alone, or improve both resolution and sensitivity. Example images obtained with multiple pulse line narrowing are presented. The present limitations and future prospects for NMR imaging of materials are discussed. RP MILLER, JB (reprint author), USN,RES LAB,DIV CHEM,CODE 6120,WASHINGTON,DC 20375, USA. NR 55 TC 10 Z9 10 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0165-9936 J9 TRAC-TREND ANAL CHEM JI Trac-Trends Anal. Chem. PD FEB PY 1991 VL 10 IS 2 BP 59 EP 64 DI 10.1016/0165-9936(91)80029-R PG 6 WC Chemistry, Analytical SC Chemistry GA FA022 UT WOS:A1991FA02200007 ER PT J AU BARTLEY, J AF BARTLEY, J TI 1991 EXPOSITION INCREASES INTERNATIONAL FLAVOR SO WELDING JOURNAL LA English DT Editorial Material RP BARTLEY, J (reprint author), USN,MARE ISL SHIPYARD,MARE ISL,CA, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER WELDING SOC PI MIAMI PA PO BOX 351040, MIAMI, FL 33135 SN 0043-2296 J9 WELD J JI Weld. J. PD FEB PY 1991 VL 70 IS 2 BP 8 EP 8 PG 1 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA EV943 UT WOS:A1991EV94300001 ER PT J AU ARBUTHNOT, NP AF ARBUTHNOT, NP TI 'BAPTISM OF DESIRE' - ERDRICH,L SO WESTERN AMERICAN LITERATURE LA English DT Book Review RP ARBUTHNOT, NP (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UTAH STATE UNIV PI LOGAN PA WESTERN LIT ASSOC UMC 32, LOGAN, UT 84322 SN 0043-3462 J9 WESTERN AM LIT JI West. Amer. Lit. PD FEB PY 1991 VL 25 IS 4 BP 363 EP 364 PG 2 WC Literature, American SC Literature GA FA748 UT WOS:A1991FA74800008 ER PT J AU KELSO, JM AF KELSO, JM TI HOUSE-DUST MITE ALLERGIN AND ASTHMA SO NEW ENGLAND JOURNAL OF MEDICINE LA English DT Letter RP KELSO, JM (reprint author), USN HOSP,SAN DIEGO,CA 92134, USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU MASS MEDICAL SOC PI BOSTON PA 10 SHATTUCK, BOSTON, MA 02115 SN 0028-4793 J9 NEW ENGL J MED JI N. Engl. J. Med. PD JAN 31 PY 1991 VL 324 IS 5 BP 338 EP 338 PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA EU922 UT WOS:A1991EU92200019 ER PT J AU SHIMEALL, TJ MCGRAW, RJ GILL, JA AF SHIMEALL, TJ MCGRAW, RJ GILL, JA TI SOFTWARE SAFETY ANALYSIS IN HETEROGENEOUS MULTIPROCESSOR CONTROL-SYSTEMS SO PROCEEDINGS ANNUAL RELIABILITY AND MAINTAINABILITY SYMPOSIUM LA English DT Article; Proceedings Paper CT 1991 ANNUAL SYMP ON RELIABILITY AND MAINTAINABILITY CY JAN 29-31, 1991 CL ORLANDO, FL SP IEEE, AMER SOC QUAL CONTROL, SOC RELIAB ENGINEERS, SOC LOGIST ENGINEERS, SYST SAFETY SOC, INST IND ENGINEERS DE SOFTWARE SAFETY; SAFETY ANALYSIS; MULTIPROCESSORS; TIMED PETRI NET; SOFTWARE FAULT TREE ANALYSIS AB Many modern digital control systems use multiprocessor architectures. This paper discusses the analysis of the safety of the software in these control system architectures, presenting an integration of two techniques, software fault tree analysis and timed Petri net analysis. This integration is demonstrated using an analysis of a military flight control system. C1 USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943. NR 0 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 0149-144X J9 P ANNU REL MAINT SYM JI Proc. Annu. Reliab. Maintainab. Symp. PD JAN 29 PY 1991 IS SYM BP 290 EP 294 DI 10.1109/ARMS.1991.154450 PG 5 WC Engineering, Multidisciplinary; Engineering, Industrial SC Engineering GA HK383 UT WOS:A1991HK38300046 ER PT J AU HIGGINS, PE CONSTANTINIDES, A AF HIGGINS, PE CONSTANTINIDES, A TI RELIABILITY GROWTH FOR EXPENDABLE MOBILE ASW TRAINING TARGET (EMATT) - A 1-SHOT DEVICE SO PROCEEDINGS ANNUAL RELIABILITY AND MAINTAINABILITY SYMPOSIUM LA English DT Article; Proceedings Paper CT 1991 ANNUAL SYMP ON RELIABILITY AND MAINTAINABILITY CY JAN 29-31, 1991 CL ORLANDO, FL SP IEEE, AMER SOC QUAL CONTROL, SOC RELIAB ENGINEERS, SOC LOGIST ENGINEERS, SYST SAFETY SOC, INST IND ENGINEERS DE RELIABILITY GROWTH TEST; 1-SHOT SYSTEM; TARGET AB The Expendable Mobile ASW Training Target (EMATT) is an open ocean one-shot expendable target employed by the Navy in simulated combat missions. EMATT is deployed either from surface vessels or from the air. Prototype models were subjected to in-water field tests at the Navy's Atlantic Underwater Test and Evaluation Center (AUTEC) at Andros Island in the Bahamas. While these tests validated EMATT's design approach the numerical reliability level achieved was too low resulting in significant design modifications including a revised layout of the Signal Processor, change to surface mounted devices in the Guidance and Control system, new mechanical packaging of the electronics, implementation of a built-in test capability, and changeover from hand crafting of mechanical components to factory tooling for high rate production. Although a major purpose of the redesign was to improve reliability such a major redesign often has an initial deleterious effect on reliability. Therefore, the redesign effort is being followed by a reliability growth or test, analyze, and fix (TAAF) program consisting of several rigorous in-water test phases aimed at validating redesign, verifying design margin and continuously improving the reliability. This effort is still in progress and the results presented are preliminary. Thirty five EMATT vehicles were made available for this purpose. At the conclusion of TAAF runs in which all of these units were utilized the initially scored reliability is 0.59 and the rescored reliability is 0.71. The MIL-HDBK-217 reliability prediction for EMATT was 0.84. Because of the limited number of trials the preciseness of the demonstrated reliability number at any given point in the growth test is certainly questionable. However, a generally increasing trend in reliability appears to be indicated. Further, and more significant than any particular reliability numbers derived from the test data at this point in time are the actual reliability problems found and corrected during the growth test and the overall conclusions reached. The conclusions are: TAAF test procedures were initially poor or missing, the depth control problem is not resolved, a mission duration problem still exists, and engineering improvement efforts should continue even on those design aspects that were deemed acceptable. Problems encountered and resulting design improvements are summarized below following a description of the EMATT vehicle and test conditions. The remaining sections of this paper then present the TAAF methodology and growth plan and results achieved. RP HIGGINS, PE (reprint author), USN,CTR UNDERWATER SYST,BLDG 990-4,NEWPORT,RI 02841, USA. NR 0 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 0149-144X J9 P ANNU REL MAINT SYM JI Proc. Annu. Reliab. Maintainab. Symp. PD JAN 29 PY 1991 IS SYM BP 497 EP 501 DI 10.1109/ARMS.1991.154487 PG 5 WC Engineering, Multidisciplinary; Engineering, Industrial SC Engineering GA HK383 UT WOS:A1991HK38300084 ER PT J AU SPRANGLE, P ZIGLER, A ESAREY, E AF SPRANGLE, P ZIGLER, A ESAREY, E TI ELIMINATION OF LASER PREPULSE BY RELATIVISTIC GUIDING IN A PLASMA SO APPLIED PHYSICS LETTERS LA English DT Article ID FREE-ELECTRON LASER; ELECTROMAGNETIC-WAVES AB A method is proposed for eliminating prepulses associated with high-power ultrashort laser pulses. In this method the high-power portion of the pulse is refractively guided due to relativistic effects associated with the plasma electrons. The low-power prepulse, however, is unaffected and diffracts away. Optical guiding is achieved by appropriately choosing the plasma density, laser power, and wavelength. In addition, a wavebreaking stabilization mechanism for the Raman backscattering instability for intense laser pulses is proposed, which indicates that the pulse should not be significantly backscattered by the plasma. RP SPRANGLE, P (reprint author), USN,RES LAB,DIV PLASMA PHYS,BEAM PHYS BRANCH,WASHINGTON,DC 20375, USA. NR 23 TC 27 Z9 27 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 JAN 28 PY 1991 VL 58 IS 4 BP 346 EP 348 DI 10.1063/1.104653 PG 3 WC Physics, Applied SC Physics GA EV460 UT WOS:A1991EV46000010 ER PT J AU HABERBERGER, RL MIKHAIL, IA ISMAIL, TF AF HABERBERGER, RL MIKHAIL, IA ISMAIL, TF TI ENTERITIS DUE TO MULTIRESISTANT ENTEROADHERENT ESCHERICHIA-COLI SO LANCET LA English DT Letter ID TRAVELERS DIARRHEA; ADHERENCE; PATTERNS; CELLS RP HABERBERGER, RL (reprint author), USN,DIV BACTERIOL,MED RES UNIT 3,CAIRO,EGYPT. NR 9 TC 11 Z9 11 U1 0 U2 0 PU LANCET LTD PI LONDON PA 42 BEDFORD SQUARE, LONDON, ENGLAND WC1B 3SL SN 0140-6736 J9 LANCET JI Lancet PD JAN 26 PY 1991 VL 337 IS 8735 BP 235 EP 236 DI 10.1016/0140-6736(91)92197-A PG 2 WC Medicine, General & Internal SC General & Internal Medicine GA EU924 UT WOS:A1991EU92400033 PM 1670861 ER PT J AU BROSTOW, W DUFFY, JV LEE, GF MADEJCZYK, K AF BROSTOW, W DUFFY, JV LEE, GF MADEJCZYK, K TI PARAMETERS OF EQUATION OF STATE OF POLYURETHANES FROM ACOUSTIC-RESONANCE AND ISOBARIC EXPANSIVITY SO MACROMOLECULES LA English DT Article ID SEGMENTED POLYURETHANES; MECHANICAL-PROPERTIES; MORPHOLOGY; TRANSITION; POLYMERS AB A series of polyurethanes was synthesized, varying the length of the soft sequences in the chain. Linear isobaric expansitivities, alpha-L, were measured as a function of temperature, T, from -100 to +100-degrees-C. Volumetric isobaric expansivities, alpha, and characteristic parameters upsilon and T* in the Hartmann equation of state23 were computed from alpha-L values. For these polymers, upsilon goes symbatically with the length of the soft segment. T* decreases at the same time, showing that longer soft segments weaken intersegmental interactions. When the Hartmann equation was used in the opposite way, specific volumes, upsilon(T), were obtained, which agree well with the experimental ones. Dynamic mechanical tests were performed on the same materials by using a resonance method; temperature shift factors, a(T), were obtained from the data. When a formula for a(T) in terms of the reduced volume upsilon-approximately-15,17 and the Hartmann equation again were used, characteristic temperatures, T*, were obtained also from the resonance data. For each polymer, the T* value from expansivity is close to the value derived from dynamic mechanical testing. Hence, the Hartmann equation provides reliable results not only for the equation of state data but also for prediction of temperature shift factors via the a(T)(upsilon-approximately) equation. C1 UNIV N TEXAS,DEPT CHEM,DENTON,TX 76203. USN,CTR SURFACE WARFARE,POLYMER PHYS GRP,SILVER SPRING,MD 20903. DREXEL UNIV,DEPT MAT ENGN,PHILADELPHIA,PA 19104. RP BROSTOW, W (reprint author), UNIV N TEXAS,CTR MAT CHARACTERIZAT,DENTON,TX 76203, USA. NR 27 TC 19 Z9 19 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD JAN 21 PY 1991 VL 24 IS 2 BP 479 EP 483 DI 10.1021/ma00002a022 PG 5 WC Polymer Science SC Polymer Science GA EU814 UT WOS:A1991EU81400022 ER PT J AU BAUM, K ARCHIBALD, TG TZENG, D GILARDI, R FLIPPENANDERSON, JL GEORGE, C AF BAUM, K ARCHIBALD, TG TZENG, D GILARDI, R FLIPPENANDERSON, JL GEORGE, C TI SYNTHESIS AND PROPERTIES OF 1,2-DIFLUORODINITROETHYLENE SO JOURNAL OF ORGANIC CHEMISTRY LA English DT Article AB 1,2-Difluorodinitroethylene was synthesized by flash vacuum pyrolysis of 1,2-difluorotetranitroethane. X-ray crystallography showed that one of the two nitro groups is out of the plane of the rest of the molecule and that the C-C double-bond distance is unusually short at 1.284 angstrom. 1,2-Difluorotetranitroethane reacted with alcohols to give alkyl fluoronitroacetates and with anthracene and cyclopentadiene to give Diels-Alder adducts. C1 USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. RP BAUM, K (reprint author), FLUOROCHEM INC,AZUSA,CA 91702, USA. NR 10 TC 15 Z9 15 U1 0 U2 1 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 18 PY 1991 VL 56 IS 2 BP 537 EP 539 DI 10.1021/jo00002a011 PG 3 WC Chemistry, Organic SC Chemistry GA EU108 UT WOS:A1991EU10800011 ER PT J AU HOFFMAN, SL AF HOFFMAN, SL TI PREVENTION OF MALARIA SO JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION LA English DT Editorial Material ID MEFLOQUINE RP HOFFMAN, SL (reprint author), USN,MED RES INST,DEPT INFECT DIS,12300 WASHINGTON AVE,ROCKVILLE,MD 20852, USA. NR 15 TC 11 Z9 11 U1 0 U2 0 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 16 PY 1991 VL 265 IS 3 BP 398 EP 399 DI 10.1001/jama.265.3.398 PG 2 WC Medicine, General & Internal SC General & Internal Medicine GA ER256 UT WOS:A1991ER25600034 PM 1984542 ER PT J AU GEORGE, C GILARDI, R FLIPPENANDERSON, JL AF GEORGE, C GILARDI, R FLIPPENANDERSON, JL TI STRUCTURE OF MYROTOXIN-B HYDRATE SO ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS LA English DT Note AB Myrotoxin B hydrakte ethyl acetate solvate, C29H36O12.C4H8O2, M(r) = 664.71, orthorhombic, Myrotoxin B hydrate ethyl acetate solvate, C29H36O12.C4H8O2, M(r) = 664.71, orthorhombic, P2(1)2(1)2(1), a = 9.911 (1), b = 15.366 (2), c = 22.548 (3) angstrom, V = 3434.1 (7) angstrom 3, Z = 4, D(x) = 1.286 Mg m-3, lambda-(Cu K-alpha) = 1.54184 angstrom, mu = 0.81 mm-1, F(000) = 1416, T = 295 K, final R = 0.048, wR = 0.063 for 3131 independent reflections with F(o) > 3sigma-F(o). In the macrocyclic ring the two hydroxyls of the tetrahydropyranyl ring are cis to each other with the hydroxyl on C(12)' axial to the ring. The solvate molecules pack in channels parallel to the a axis, and there is an intermolecular hydrogen bond between the two hydroxyls with the axial hydroxyl acting as a donor [H...O = 1.83 (5), O...O = 2.735 (7) angstrom, and angle O-H...O = 170 (3)-degrees]. RP GEORGE, C (reprint author), USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375, USA. NR 6 TC 2 Z9 2 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-2701 J9 ACTA CRYSTALLOGR C JI Acta Crystallogr. Sect. C-Cryst. Struct. Commun. PD JAN 15 PY 1991 VL 47 BP 218 EP 220 DI 10.1107/S0108270190006989 PN 1 PG 3 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA EW121 UT WOS:A1991EW12100085 ER PT J AU ROBINSON, DH WARREN, MK LIANG, LT OPRANDY, JJ NIELSEN, TB KANG, YH AF ROBINSON, DH WARREN, MK LIANG, LT OPRANDY, JJ NIELSEN, TB KANG, YH TI RETROVIRAL TRANSFORMATION OF CEREBRAL MICROVASCULAR ENDOTHELIAL-CELLS - MACROPHAGE-LIKE AND MICROVASCULAR ENDOTHELIAL-CELL PROPERTIES SO BLOOD LA English DT Article ID COLONY-STIMULATING FACTORS; CENTRAL NERVOUS-SYSTEM; MOUSE YOLK-SAC; AMEBOID MICROGLIA; GROWTH-FACTOR; ENV GENE; DIFFERENTIATION; VIRUS; ESTABLISHMENT; PROLIFERATION C1 USN,INST MED RES,DEPT INFECT DIS,BETHESDA,MD 20814. USN,INST MED RES,DEPT CASUALTY CARE RES,BETHESDA,MD 20814. OTSUKA AMER PHARMACEUT,ROCKVILLE,MD. RP ROBINSON, DH (reprint author), USN,MED CTR,INST MED RES,DEPT DIVING MED,LCDR,BETHESDA,MD 20814, USA. NR 69 TC 15 Z9 15 U1 0 U2 1 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD JAN 15 PY 1991 VL 77 IS 2 BP 294 EP 305 PG 12 WC Hematology SC Hematology GA ER719 UT WOS:A1991ER71900011 PM 1985696 ER PT J AU MULSHINE, JL CARRASQUILLO, JA WEINSTEIN, JN KEENAN, AM REYNOLDS, JC HERDT, J BUNN, PA SAUSVILLE, E EDDY, J COTELINGAM, JD PERENTESIS, P PINSKY, C LARSON, SM AF MULSHINE, JL CARRASQUILLO, JA WEINSTEIN, JN KEENAN, AM REYNOLDS, JC HERDT, J BUNN, PA SAUSVILLE, E EDDY, J COTELINGAM, JD PERENTESIS, P PINSKY, C LARSON, SM TI DIRECT INTRALYMPHATIC INJECTION OF RADIOLABELED IN-111 T101 IN PATIENTS WITH CUTANEOUS T-CELL LYMPHOMA SO CANCER RESEARCH LA English DT Article ID T101 MONOCLONAL-ANTIBODY; CHRONIC LYMPHOCYTIC-LEUKEMIA; SEZARY SYNDROME; MYCOSIS-FUNGOIDES; IMMUNOLYMPHOSCINTIGRAPHY; RADIOIMMUNODETECTION; IMMUNOGLOBULIN; LYMPHATICS; THERAPY; LYMPHOSCINTIGRAPHY AB Direct intralymphatic administration of radiolabeled monoclonal antibody in targeting antigen-bearing lymphoma cells in regional lymph nodes of patients with cutaneous T-cell lymphoma was evaluated. Seven consecutive patients undergoing staging lymphangiography received intralymphatic infusions of In-111-T101 to evaluate lymph node involvement. This procedure was accomplished without significant complication. The In-111-T101 rapidly distributed throughout the regional lymphatic compartment and passed into the systemic circulation. Tumor-bearing sites in the inguinal-femoral lymph nodes retained from 0.42 to 4.8% of the injected dose of radiolabeled antibody. Three patients were upstaged to Stage IVA based on tumor involvement found after radiolymphoscintigraphy-directed biopsy of groin lymph nodes, selected because of intense radioactivity by gamma camera imaging. Compared with previously reported s.c. antibody administration, there was a marked reduction in the radioactive exposure of normal tissues at the injection sites in the lower extremities. Direct intralymphatic delivery of In-111-T101 appears to be a feasible, efficient method for delivering therapeutic doses of radiolabeled antibody. C1 NIH,WARREN C MAGNUSON CLIN CTR,DEPT NUCL MED,BETHESDA,MD 20892. NIH,WARREN C MAGNUSON CLIN CTR,DEPT RADIOL,BETHESDA,MD 20892. NCI,MATH BIOL LAB,BETHESDA,MD 20892. UNIV COLORADO,CTR CANC,DIV MED ONCOL,DENVER,CO 80262. UNIV COLORADO,CTR HLTH SERV,DENVER,CO 80262. USN HOSP,DEPT PATHOL,BETHESDA,MD 20814. NCI,FREDERICK CANC RES FACIL,DIV CANC TREATMENT,BIOL RESPONSE MODIFIER PROGRAM,FREDERICK,MD 21701. MEM SLOAN KETTERING CANC CTR,DEPT NUCL MED,NEW YORK,NY 10021. RP MULSHINE, JL (reprint author), USN HOSP,NCI NAVY MED ONCOL BRANCH,DIV CANC THERAPY,CLIN ONCOL PROGRAM,BETHESDA,MD 20814, USA. RI Carrasquillo, Jorge/E-7120-2010 NR 36 TC 13 Z9 13 U1 0 U2 0 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 JAN 15 PY 1991 VL 51 IS 2 BP 688 EP 695 PG 8 WC Oncology SC Oncology GA ET789 UT WOS:A1991ET78900037 PM 1985786 ER PT J AU ZABARNICK, S FLEMING, JW LIN, MC AF ZABARNICK, S FLEMING, JW LIN, MC TI DIRECT MEASUREMENT OF RATE CONSTANTS FOR THE REACTIONS OF CH AND CD WITH HCN AND DCN SO CHEMICAL PHYSICS LA English DT Article ID RADICAL REACTIONS; KINETICS; MECHANISMS AB Multiphoton laser photolysis of CHBr3 (or CDBr3) at 266 nm is utilized for the production of ground state CH (X2-PI) (or CD) radicals in the gas phase. The relative concentration of CH (or CD) is monitored by laser-induced fluorescence near 430 nm. Absolute rate constants are determined by addition of HCN or DCN to the slowly flowing gas mixture. Heating of the reaction cell permits temperature studies between 293 and 676 K. The following Arrhenius expressions are derived: k = (5.0 +/- 0.4) x 10(-11) X exp [(500 +/- 30)/T] cm3 s-1 for CH+HCN; k = (8.1 +/- 1.7) x 10(-11) exp [(420 +/- 80)/T] cm3 s-1 for CH+DCN; k = (9.1 +/- 1.5) x 10(-11) exp [(420 +/- 70)/T] cm3 s-1 for CD+HCN and k = (5.4 +/- 0.7) x 10(-11) exp [(560 +/- 50)/T] cm3 s-1 for CD + DCN. The measured rate constants for the CH + HCN reaction do not vary with total pressure over the range 35-300 Torr at 296 K. The present observations are consistent with CH insertion into the C-H bond in HCN followed by decomposition of the adduct to H + HCCN as the dominant reactive pathway. The rate measurements on mixed isotope species (i.e. CH + DCN or CD + HCN) support the conclusion that exchange reactions do occur to some extent above 475 K as in CH + DCN --> CD + HCN and CD + HCN --> CH + DCN. The result of the totally deuterated reaction (i.e. CD + DCN) indicates that the inverse isotope effect is important. C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. EMORY UNIV,DEPT CHEM,ATLANTA,GA 30322. RP ZABARNICK, S (reprint author), UNIV DAYTON,RES INST,ASTRONAUT LAB,AFSC,LSCC,EDWARDS AFB,CA 93523, USA. NR 20 TC 17 Z9 17 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0301-0104 J9 CHEM PHYS JI Chem. Phys. PD JAN 15 PY 1991 VL 150 IS 1 BP 109 EP 115 DI 10.1016/0301-0104(91)90060-7 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA EU977 UT WOS:A1991EU97700012 ER PT J AU WATROUS, JJ MOSHER, D NERI, JM OTTINGER, PF OLSON, CL CROW, JT PETERSON, RR AF WATROUS, JJ MOSHER, D NERI, JM OTTINGER, PF OLSON, CL CROW, JT PETERSON, RR TI WIRE-GUIDED TRANSPORT OF INTENSE ION-BEAMS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID Z-DISCHARGE PLASMA; CHANNELS; PROPAGATION; DESIGN; DIODE AB Light ion inertial confinement fusion requires beam transport over distances of a few meters for isolation of the diode hardware from the target explosion and for power compression by time-of-flight bunching. This paper evaluates a wire-guided transport system that uses the azimuthal magnetic field, produced by a current driven through a thin wire, to radially confine the ion beam. Ion orbits are studied to determine the injection efficiency (i.e., the fraction of the beam which is transported) under various conditions. Some ions hit the wire because of too small angular momentum at injection; others hit the wire or are lost to large radius during transport because of chaotic orbit behavior induced by a small number of return-current wires close to the beam envelope. For a multimodular scheme (10-30 beams), individual transport system are packed around the target at some standoff distance. The fraction of the beam which is lost in this field-free standoff region is also evaluated under various conditions. The standoff efficiency is then combined with the injection efficiency to give the dependence of the total transport efficiency, eta-t, on diode, focusing, transport, and standoff parameters. It is found that eta-t can be as large as about 60% for parameter values which appear to be achievable. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP WATROUS, JJ (reprint author), USN,RES LAB,DIV PLASMA PHYS,WASHINGTON,DC 20375, USA. NR 30 TC 14 Z9 14 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 15 PY 1991 VL 69 IS 2 BP 639 EP 655 DI 10.1063/1.347344 PG 17 WC Physics, Applied SC Physics GA EU225 UT WOS:A1991EU22500014 ER PT J AU KROL, A RESAT, H SHER, CJ WORONICK, SC NG, W KAO, YH COLE, TL GREEN, AK LOWEMA, CK NEE, TW REHN, V AF KROL, A RESAT, H SHER, CJ WORONICK, SC NG, W KAO, YH COLE, TL GREEN, AK LOWEMA, CK NEE, TW REHN, V TI INVESTIGATION OF INTERFACIAL ROUGHNESS OF INXGA1-XAS EPITAXIAL LAYERS ON GAAS AND INP SUBSTRATES BY SOFT-X-RAY REFLECTIVITY SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID MOLECULAR-BEAM EPITAXY; SINGLE QUANTUM WELLS; SCATTERING; HETEROSTRUCTURES; MULTILAYERS; SURFACES AB The grazing incidence x-ray reflectivity is a nondestructive and sensitive technique for probing the depth profile of electron density in layered structures. This method has been utilized in the soft x-ray regime to determine the roughness of interfaces, and the epilayer thickness in In(x)Ga(1-x)As/InP and In(x)Ga(1-x)As/GaAs heterostructures, for x = 0.57 and x = 0.60, grown by molecular beam epitaxy. By fitting the experimental results to our model, assuming uncorrelated interfacial roughness, we conclude that the top surface roughness does not depend on the type of the substrate or presence of stress in the epilayer, and is always smaller than interfacial roughness. The main factors which control the interfacial roughness are the quality of substrate and/or growth conditions rather than strain or lattice mismatch. C1 USN,CTR WEAP,RES DEPT,DIV PHYS,CHINA LAKE,CA 93555. RP KROL, A (reprint author), SUNY BUFFALO,DEPT PHYS,BUFFALO,NY 14260, USA. NR 31 TC 10 Z9 10 U1 1 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 15 PY 1991 VL 69 IS 2 BP 949 EP 953 DI 10.1063/1.347338 PG 5 WC Physics, Applied SC Physics GA EU225 UT WOS:A1991EU22500066 ER PT J AU WEAVER, BD REEVES, ME CHRISEY, DB SUMMERS, GP OLSON, WL EDDY, MM JAMES, TW SMITH, EJ AF WEAVER, BD REEVES, ME CHRISEY, DB SUMMERS, GP OLSON, WL EDDY, MM JAMES, TW SMITH, EJ TI CRITICAL CURRENT ENHANCEMENT IN PROTON-IRRADIATED TL2CABA2CU2O8 FILMS SO JOURNAL OF APPLIED PHYSICS LA English DT Note ID CRITICAL CURRENT-DENSITY; THIN-FILMS; YBA2CU3O7-DELTA AB We have measured changes in the superconducting transition temperature T(c) and critical current density J(c) of epitaxial Tl2CaBa2Cu2O8 films upon exposure to 2 MeV protons. J(c) was measured inductively at 4.2 and 77 K and in fields of H = 0 and 0.2 T. At 77 K and H = 0, J(c) decrease is about 1.8 times greater than for YBa2Cu3O7 films, even though the rate of change of T(c) with PHI is comparable. At 4.2 K, J(c) is initially enhanced, even at H = 0. The maximum observed increase is 34% (to 8 MA/cm2) at PHI almost-equal-to 10(16) protons/cm2 and H = 0.2 T. This enhancement is attributed to pinning of magnetic flux lines by proton-induced defects. C1 SUPERCONDUCTOR TECHNOL INC,SANTA BARBARA,CA 93111. RP WEAVER, BD (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 12 TC 12 Z9 12 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 15 PY 1991 VL 69 IS 2 BP 1119 EP 1121 DI 10.1063/1.347384 PG 3 WC Physics, Applied SC Physics GA EU225 UT WOS:A1991EU22500096 ER PT J AU RICE, JK BARONAVSKI, AP AF RICE, JK BARONAVSKI, AP TI NONSTATISTICAL CO PRODUCT DISTRIBUTIONS FROM THE HOT H-ATOM REACTION, H+CO2-]OH+CO SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID SINGLE-COLLISION CONDITIONS; GOLDEN RULE CALCULATION; OH + CO; STATE DISTRIBUTION; LASER PHOTOLYSIS; H+CO2 REACTION; PHOTODISSOCIATION; H2S; REACTANTS; COMPLEXES AB The hot H-atom reaction, H + CO2-->OH + CO is investigated under several initial conditions designed to vary the angular momentum of the CO2 reactant. The translationally hot H atoms are produced by photodissociating H2S at 193 nm, resulting in a reaction exoergicity of approximately 120 kJ mol-1. The internal energy in the CO product is monitored by laser-induced fluorescence in the VUV spectral range. Under near-nascent conditions we report the rotational distributions of CO in upsilon" = 0 under CO2 reactant "temperatures" of 300, 70 and 40 K. Also reported are the rotational distributions of CO in upsilon" = 1 at 300 K and 70 K and the population ratios of [upsilon" = 1]/[upsilon" = 0] at both initial CO2 temperatures. Three distinctively "dynamical" aspects of the potential energy (PE) surface are exhibited in this set of experiments: (i) As the CO2 reactant is cooled, a cooling of the CO distribution is seen which suggests the reaction intermediate does not live long enough to randomize its internal energy. (ii) We report a coupling of vibrational and rotational excitation in the CO product indicated by a "hotter" rotational energy in upsilon" = 1 than upsilon" = 0 at 300 K. (iii) In addition, we report different [upsilon" = 1]/[upsilon" = 0] ratios at the two CO2 initial temperatures. Contrary to nearly all indications from measurements on the OH product, the CO product is rich in "nonstatistical" behavior. RP RICE, JK (reprint author), USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375, USA. NR 48 TC 43 Z9 43 U1 2 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JAN 15 PY 1991 VL 94 IS 2 BP 1006 EP 1019 DI 10.1063/1.460056 PG 14 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA EU592 UT WOS:A1991EU59200020 ER PT J AU MEDWIN, H AF MEDWIN, H TI AMBIENT AND TRANSIENT BUBBLE SPECTRAL DENSITIES IN QUIESCENT SEAS AND UNDER SPILLING BREAKERS - REPLY SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Note ID POPULATIONS; CLOUDS RP MEDWIN, H (reprint author), USN,POSTGRAD SCH,DEPT PHYS,MONTEREY,CA 93943, USA. NR 10 TC 1 Z9 1 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 1991 VL 96 IS C1 BP 867 EP 867 DI 10.1029/90JC01857 PG 1 WC Oceanography SC Oceanography GA FD792 UT WOS:A1991FD79200014 ER PT J AU EVANS, JL HOLLAND, GJ ELSBERRY, RL AF EVANS, JL HOLLAND, GJ ELSBERRY, RL TI INTERACTIONS BETWEEN A BAROTROPIC VORTEX AND AN IDEALIZED SUBTROPICAL RIDGE .1. VORTEX MOTION SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article ID TROPICAL CYCLONE MOTION; SHALLOW-WATER; MODEL AB A series of barotropic modeling experiments are used to examine the motion of a vortex in the vicinity of an idealized subtropical ridge. The vortex propagation is highly correlated with the absolute vorticity gradient in the initial imposed environment. The signal is degraded when radial band averages are used to calculate the environmental advection and absolute vorticity gradient components. It is shown here that this is due partially to the difficulties in separating the cyclone from its environment. Application of the modeling results to climatological mean fields indicates that considerable variations in vortex propagation can occur. C1 MONASH UNIV,CTR DYNAM METEOROL,MELBOURNE,VIC 3004,AUSTRALIA. BUR METEOROL,RES CTR,MELBOURNE,AUSTRALIA. USN,POSTGRAD SCH,MONTEREY,CA 93940. NR 20 TC 48 Z9 52 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 JAN 15 PY 1991 VL 48 IS 2 BP 301 EP 314 DI 10.1175/1520-0469(1991)048<0301:IBABVA>2.0.CO;2 PG 14 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA EZ849 UT WOS:A1991EZ84900005 ER PT J AU RABINOVICH, WS GILBREATH, GC FELDMAN, BJ AF RABINOVICH, WS GILBREATH, GC FELDMAN, BJ TI ACHROMATIC MULTIBEAM COUPLING IN KNBO3-RB SO OPTICS COMMUNICATIONS LA English DT Article ID LIGHT AMPLIFICATION; HOLOGRAPHY; CRYSTALS AB We examine, both theoretically and experimentally, photorefractive coupling in KNbO3:Rb with beams at several wavelengths in a dual grating achromatic arrangement. It is shown that, at normal incidence, the coupling gain in the multi-wavelength achromatic configuration is nearly equal to the gain of two beam coupling with a monochromatic source of the same intensity. The dependence of the achromatic gain on the angle between the bisector, of the pump and signal beams, and the normal to the crystal surface is also studied. RP RABINOVICH, WS (reprint author), USN,RES LAB,LASER PHYS BRANCH,WASHINGTON,DC 20375, USA. NR 20 TC 4 Z9 4 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 JAN 15 PY 1991 VL 80 IS 5-6 BP 317 EP 323 DI 10.1016/0030-4018(91)90416-B PG 7 WC Optics SC Optics GA EX617 UT WOS:A1991EX61700006 ER PT J AU BOBB, LC KRUMBOLTZ, HD SHANKAR, PM AF BOBB, LC KRUMBOLTZ, HD SHANKAR, PM TI PRESSURE SENSOR THAT USES BENT BICONICALLY TAPERED SINGLE-MODE FIBERS SO OPTICS LETTERS LA English DT Article AB A novel sensor that uses tapered single-mode fibers is discussed. The tapered single-mode fiber is bent in a simple fixture to increase its sensitivity. Pressure sensors have been fabricated utilizing the bend-sensitive property of the biconically tapered single-mode fibers. C1 DREXEL UNIV,DEPT ELECT & COMP ENGN,PHILADELPHIA,PA 19104. RP BOBB, LC (reprint author), USN,CTR AIR DEV,WARMINSTER,PA 18974, USA. NR 4 TC 9 Z9 9 U1 3 U2 4 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD JAN 15 PY 1991 VL 16 IS 2 BP 112 EP 114 DI 10.1364/OL.16.000112 PG 3 WC Optics SC Optics GA EV196 UT WOS:A1991EV19600018 PM 19773854 ER PT J AU LU, ZM HEAGY, JF VALLIERES, M YUAN, JM AF LU, ZM HEAGY, JF VALLIERES, M YUAN, JM TI QUANTUM DISSOCIATION BOUNDARY OF A KICKED MORSE OSCILLATOR SO PHYSICAL REVIEW A LA English DT Note ID CLASSICAL DYNAMICS; EXCITATION; DRIVEN; SYSTEMS; CHAOS AB A quantum study of the dissociation dynamics of a kicked Morse oscillator reveals that the boundary separating the dissociation and nondissociation regions in the parameter space of the kicking strength and period is a highly oscillatory curve. Large fluctuations also occur in the lifetime distribution in the dissociation region. These features represent quantum manifestations of the fractal behavior seen in corresponding classical studies. Experimental relevance of this sensitive dependence on the field parameters is discussed. C1 USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903. RP LU, ZM (reprint author), DREXEL UNIV,DEPT PHYS & ATMOSPHER SCI,PHILADELPHIA,PA 19104, USA. NR 27 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 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JAN 15 PY 1991 VL 43 IS 2 BP 1118 EP 1211 DI 10.1103/PhysRevA.43.1118 PG 94 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA EU856 UT WOS:A1991EU85600056 ER PT J AU SINGH, D KRAKAUER, H AF SINGH, D KRAKAUER, H TI H-POINT PHONON IN MOLYBDENUM - SUPERLINEARIZED AUGMENTED-PLANE-WAVE CALCULATIONS SO PHYSICAL REVIEW B LA English DT Article ID TOTAL-ENERGY CALCULATIONS; TRANSITION-METALS; BRILLOUIN-ZONE; VIBRATIONAL FREQUENCIES; STRUCTURAL-PROPERTIES; ELECTRONIC-STRUCTURE; MO; NB AB Local-density-approximation calculations of the H-point phonon frequency of molybdenum were carried out using a new superlinearized augmented-plane-wave basis. The calculated frequency is in quite good agreement with experiment. This indicates that the effect of the many-body renormalization of the electronic states near the Fermi energy on this frequency is smaller than previously suggested. The superlinearized basis and its use to circumvent computational difficulties associated with extended semicore states such as the 4p state of molybdenum is described. C1 COLL WILLIAM & MARY,WILLIAMSBURG,VA 23185. RP SINGH, D (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Singh, David/I-2416-2012; OI Krakauer, Henry/0000-0003-2517-0957 NR 24 TC 23 Z9 23 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 JAN 15 PY 1991 VL 43 IS 2 BP 1441 EP 1445 DI 10.1103/PhysRevB.43.1441 PG 5 WC Physics, Condensed Matter SC Physics GA ET218 UT WOS:A1991ET21800017 ER PT J AU OSBURN, JE MEHL, MJ KLEIN, BM AF OSBURN, JE MEHL, MJ KLEIN, BM TI 1ST-PRINCIPLES CALCULATION OF THE ELASTIC-MODULI OF NI3AL SO PHYSICAL REVIEW B LA English DT Note ID CONSTANTS; METALS AB We have computed the elastic constants for Ni3Al in the L1(2) structure using the full-potential, total-energy linearized augmented-plane-wave method. The results compare extremely well with accepted experimental values. RP OSBURN, JE (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. RI Mehl, Michael/H-8814-2016 NR 19 TC 26 Z9 26 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 1991 VL 43 IS 2 BP 1805 EP 1807 DI 10.1103/PhysRevB.43.1805 PG 3 WC Physics, Condensed Matter SC Physics GA ET218 UT WOS:A1991ET21800059 ER PT J AU FELDMAN, JL BROUGHTON, JQ WOOTEN, F AF FELDMAN, JL BROUGHTON, JQ WOOTEN, F TI ELASTIC PROPERTIES OF AMORPHOUS SI AND DERIVED DEBYE TEMPERATURES AND GRUNEISEN PARAMETERS - MODEL CALCULATION SO PHYSICAL REVIEW B LA English DT Article ID RANDOM NETWORK MODELS; MOLECULAR-DYNAMICS; SILICON; CONSTANTS; POTENTIALS; HEAT; GE AB Calculations, based on the Stillinger-Weber (SW) interatomic-potential model and the method of long waves, are presented for the elastic properties of amorphous Si (alpha-Si) and for pressure derivatives of the elastic constants of crystalline Si. Several models of alpha-Si, relaxed on the basis of the SW potential, are considered, and the external stresses that are associated with these models are evaluated using the Born-Huang relations. The elastic constants appear to obey the isotropy conditions to within a reasonable accuracy and are also consistent with other predictions based on the SW potential at finite temperature obtained by Klu ge and Ray. Estimates of the pressure dependence of the elastic constants, Debye temperature, and Grueisen parameter for alpha-Si are also provided on the basis of these calculations. C1 UNIV CALIF DAVIS,DEPT APPL SCI,LIVERMORE,CA 94550. RP FELDMAN, JL (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. NR 33 TC 18 Z9 19 U1 1 U2 5 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 1991 VL 43 IS 3 BP 2152 EP 2158 DI 10.1103/PhysRevB.43.2152 PG 7 WC Physics, Condensed Matter SC Physics GA EV605 UT WOS:A1991EV60500030 ER PT J AU JACKSON, K PEDERSON, MR KLEIN, BM AF JACKSON, K PEDERSON, MR KLEIN, BM TI 1ST-PRINCIPLES CALCULATIONS OF DEFECT-INDUCED LATTICE-RELAXATION IN IONIC SYSTEMS SO PHYSICAL REVIEW B LA English DT Article ID F-TYPE CENTERS; ELECTRONIC-STRUCTURE; MGO; CRYSTALS; STATES; LICL; CU+; CAO AB Local-density-approximation methods are used to investigate defect-induced lattice relaxation in LiCl:Cu+ and for the F center in MgO. Calculations are carried out on large finite clusters of atoms using a linear combination of atomic orbitals (LCAO)-type basis set, and defect-related properties are deduced from a comparison of results for related pure and defect clusters. The outer atomic shells of these clusters are allowed to relax, to respond to effects of truncating the clusters at finite sizes. We show that, this relaxation, the calculated electronic and structural properties of the pure clusters are good approximations to the corresponding bulk properties. Using the finite-cluster procedure, we find essentially no relaxation of the defect near-neighbor ions in LiCl:Cu+, but an inward relaxation of 1.3% of the near-neighbor ions around the F center in MgO. RP JACKSON, K (reprint author), USN,RES LAB,DIV CONDENSED MATTER & RADIAT SCI,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. OI Jackson, Koblar/0000-0002-5342-7978 NR 18 TC 15 Z9 15 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 1991 VL 43 IS 3 BP 2364 EP 2371 DI 10.1103/PhysRevB.43.2364 PG 8 WC Physics, Condensed Matter SC Physics GA EV605 UT WOS:A1991EV60500058 ER PT J AU CHEN, J KRAKAUER, H SINGH, DJ AF CHEN, J KRAKAUER, H SINGH, DJ TI SURFACE STRAIN OF TUNGSTEN (001) SO PHYSICAL REVIEW B LA English DT Note ID ORDER-DISORDER TRANSITION; PLANE-WAVE METHOD; PHASE-TRANSITION; W(001) SURFACE; ELECTRONIC-STRUCTURE; TOTAL-ENERGY; RECONSTRUCTION; W(100); INSTABILITY; DISTORTION AB We report the results of ab initio local-density-functional total-energy calculations of W(001) slabs of varying thickness as a function of the in-plane or surface lattice parameter. The results are used to isolate the surface strain energy of the ideal surface. We find that the ideal W(001) surface is softer than the bulk and has a small tensile strain of about 1% with a strain energy of less than 1 mRy/(surface atom). A comparison of the strain energy with the energy associated with the reconstruction leads to the conclusions that the interaction between the ideal surface atoms is weakly attractive and the instability of the ideal W(001) surface is not the result of a large surface strain. C1 USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375. RP CHEN, J (reprint author), COLL WILLIAM & MARY,DEPT PHYS,WILLIAMSBURG,VA 23185, USA. RI Singh, David/I-2416-2012; OI Krakauer, Henry/0000-0003-2517-0957 NR 27 TC 3 Z9 3 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 15 PY 1991 VL 43 IS 3 BP 2398 EP 2400 DI 10.1103/PhysRevB.43.2398 PG 3 WC Physics, Condensed Matter SC Physics GA EV605 UT WOS:A1991EV60500063 ER PT J AU TROMBETTA, JM KENNEDY, TA TSENG, W GAMMON, D AF TROMBETTA, JM KENNEDY, TA TSENG, W GAMMON, D TI GALLIUM INTERSTITIALS IN GAAS ALAS SUPERLATTICES SO PHYSICAL REVIEW B LA English DT Note ID DETECTED MAGNETIC-RESONANCE; QUANTUM-WELL STRUCTURES; NATIVE DEFECTS; SEMICONDUCTORS; ALXGA1-XAS AB Optically detected magnetic resonance of point defects in a GaAs/AlAs superlattice is reported. The spectrum is characterized by g = 2.007 and hyperfine coupling, 69A = 0.054 cm-1 and 71A = 0.069 cm-1, due to Ga. The electronic state has A1 symmetry, consistent with theoretical predictions for the interstitial Ga atom but not for the Ga(As) antisite. Recombination via these defects reduces the intrinsic excitonic emission of the superlattice. The wave function shows no axial perturbation from the nearby potential barriers, demonstrating its localized character. RP TROMBETTA, JM (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 15 TC 18 Z9 18 U1 2 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 1991 VL 43 IS 3 BP 2458 EP 2461 DI 10.1103/PhysRevB.43.2458 PG 4 WC Physics, Condensed Matter SC Physics GA EV605 UT WOS:A1991EV60500079 ER PT J AU KONKOWSKI, DA HELLIWELL, TM AF KONKOWSKI, DA HELLIWELL, TM TI STABILITY OF THE QUASI-REGULAR SINGULARITIES IN BELL-SZEKERES SPACETIME SO PHYSICAL REVIEW D LA English DT Note ID PLANE-WAVES; COSMOLOGIES; STRINGS AB The behavior of geodesics and test minimally coupled scalar waves on the Bell-Szekeres spacetime is used to probe the nature of the quasiregular singularities present. Components of the stress-energy tensor in a parallel-propagated orthonormal frame diverge as does a stress-energy scalar at the quasiregular singularities. It is argued that this divergence makes the singularities unstable, converting them into scalar curvature singularities. C1 HARVEY MUDD COLL,DEPT PHYS,CLAREMONT,CA 91711. RP KONKOWSKI, DA (reprint author), USN ACAD,DEPT MATH,ANNAPOLIS,MD 21402, USA. NR 15 TC 7 Z9 7 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 15 PY 1991 VL 43 IS 2 BP 609 EP 612 DI 10.1103/PhysRevD.43.609 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA ET217 UT WOS:A1991ET21700038 ER PT J AU VOHRA, ST BUCHOLTZ, F KOO, KP DAGENAIS, DM AF VOHRA, ST BUCHOLTZ, F KOO, KP DAGENAIS, DM TI EXPERIMENTAL-OBSERVATION OF PERIOD-DOUBLING SUPPRESSION IN THE STRAIN DYNAMICS OF A MAGNETOSTRICTIVE RIBBON SO PHYSICAL REVIEW LETTERS LA English DT Article ID NOISY PRECURSORS; BOUNCING-BALL; SYSTEMS; INSTABILITIES AB Suppression and shift of period-doubling bifurcation due to a periodic perturbation is experimentally observed in the strain dynamics of a magnetically driven magnetostrictive ribbon. First experimental verification of the predicted scaling law relating the shift of the bifurcation point to the perturbation amplitude is made. The predicted switchlike nonlinearities in the perturbing signal around the bifurcation point are also observed. C1 SFA INC,LANDOVER,MD 20785. RP VOHRA, ST (reprint author), USN,RES LAB,CODE 6570,WASHINGTON,DC 20375, USA. NR 15 TC 20 Z9 20 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 14 PY 1991 VL 66 IS 2 BP 212 EP 215 DI 10.1103/PhysRevLett.66.212 PG 4 WC Physics, Multidisciplinary SC Physics GA ER720 UT WOS:A1991ER72000023 ER PT J AU MOR, O MESSINGER, Y ROTMAN, G BARAM, I RAVIA, Y EDDY, RL SHOWS, TB PARK, JG GAZDAR, AF SHILOH, Y AF MOR, O MESSINGER, Y ROTMAN, G BARAM, I RAVIA, Y EDDY, RL SHOWS, TB PARK, JG GAZDAR, AF SHILOH, Y TI NOVEL DNA-SEQUENCES AT CHROMOSOME-10Q26 ARE AMPLIFIED IN HUMAN GASTRIC-CARCINOMA CELL-LINES - MOLECULAR-CLONING BY COMPETITIVE DNA REASSOCIATION SO NUCLEIC ACIDS RESEARCH LA English DT Article ID DIHYDROFOLATE-REDUCTASE AMPLICONS; NEURO-BLASTOMA CELLS; HUMAN-TUMOR CELLS; DOUBLE MINUTES; N-MYC; C-MYC; HUMAN NEUROBLASTOMAS; HUMAN-BREAST; AMPLIFICATION; ONCOGENE AB Molecular cloning of genomic sequences altered in cancer cells is believed to lead to the identification of new genes involved in the initiation and progression of the malignant phenotype. DNA amplification is a frequent molecular alteration in tumor cells, and is a mode of proto-oncogene activation. The cytologic manifestation of this phenomenon is the appearance of chromosomal homogeneously staining regions (HSRs) or double minute bodies (DMs). The gastric carcinoma cell line KATO III is characterized by a large HSR on chromosome 11. In-gel renaturation analysis confirmed the amplification of DNA sequences in this cell line, yet none of 42 proto-oncogenes that we tested is amplified in KATO III DNA. We employed the phenol-enhanced reassociation technique (PERT) to isolate 21 random DNA fragments from the amplified domain, and used 6 of them to further clone some 150 kb from that genomic region. While in situ hybridization performed with some of these sequences indicated that in KATO III they are indeed amplified within the HSR on chromosome 11, somatic cell hybrid analysis and in situ hybridization to normal lymphocyte chromosomes showed that they are derived from chromosome 10, band q26. The same sequences were found to be amplified in another gastric carcinoma cell line, SNU-16, which contains DMs, but were not amplified in other 70 cell lines representing a wide variety of human neoplasms. One of these sequences was highly expressed in both KATO III and SNU-16. Thus, the cloned sequences supply a starting point for identification of novel genes which might be involved in the pathogenesis of gastric cancers, and are located in a relatively unexplored domain of the human genome. C1 TEL AVIV UNIV,SACKLER SCH MED,DEPT HUMAN GENET,IL-69978 TEL AVIV,ISRAEL. NCI USN MED ONCOL BRANCH,BETHESDA,MD 20892. NEW YORK STATE DEPT HLTH,ROSWELL PK MEM INST,DEPT HUMAN GENET,BUFFALO,NY 14263. SEOUL NATL UNIV,COLL MED,CANC RES INST,SEOUL 110744,SOUTH KOREA. RI Park, Jae-Gahb/J-5494-2012 FU NICHD NIH HHS [HD 05196]; NIGMS NIH HHS [GM 20454] NR 46 TC 16 Z9 16 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD JAN 11 PY 1991 VL 19 IS 1 BP 117 EP 123 DI 10.1093/nar/19.1.117 PG 7 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA EU151 UT WOS:A1991EU15100016 PM 2011492 ER PT J AU DENNINGHAM, RL GRIFFIN, RD LEE, JN AF DENNINGHAM, RL GRIFFIN, RD LEE, JN TI OPTICAL MATCHED-FILTER WITH LOG-CONSTANT FALSE ALARM DETECTION SO APPLIED OPTICS LA English DT Note AB We have demonstrated and analyzed an analog electronic constant false alarm rate processor that discriminates against distributed clutter for an acoustooptic correlator of a potentially large time-bandwidth product. RP DENNINGHAM, RL (reprint author), USN,RES LAB,ADV CONCEPTS BRANCH,WASHINGTON,DC 20375, USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD JAN 10 PY 1991 VL 30 IS 2 BP 181 EP 182 PG 2 WC Optics SC Optics GA EU076 UT WOS:A1991EU07600006 PM 20581966 ER PT J AU SICA, L AF SICA, L TI ESTIMATOR AND SIGNAL-TO-NOISE RATIO FOR AN INTEGRATIVE SYNTHETIC APERTURE IMAGING TECHNIQUE SO APPLIED OPTICS LA English DT Article AB An imaging system is described which uses the following concepts: laser illumination of objects, nonredundant apertures, and phase closure. A sparse transmitter array is envisioned, each aperture of which emits at a different laser frequency such that any pair of beams gives rise to a unique beat signal. The light reflected by an object thus irradiated is sensed by a spatially integrating detector array. An estimator is given for the Fourier components of the object at spatial frequencies corresponding to the unique temporal beats sensed by the receiver array. The standard deviation of the estimator is computed taking both shot noise and laser speckle into account. It is found that the signal-to-noise ratio for both kinds of noise increases with the square root of the area of the detector array. This allows the signal-to-noise ratio of the system to be increased independent of the resolution. RP SICA, L (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 14 TC 9 Z9 9 U1 1 U2 2 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD JAN 10 PY 1991 VL 30 IS 2 BP 206 EP 213 PG 8 WC Optics SC Optics GA EU076 UT WOS:A1991EU07600011 PM 20581971 ER PT J AU NASH, AG AF NASH, AG TI ROTATION OF THE SUNS OUTER WHITE-LIGHT CORONA DETERMINED FROM SOLWIND DATA SO ASTROPHYSICAL JOURNAL LA English DT Article DE HYDROMAGNETICS; SUN CORONA; SUN MAGNETIC FIELDS; SUN ROTATION ID MAGNETIC-FIELD; DIFFERENTIAL ROTATION; SOLAR CORONA; RIGID ROTATION; HOLES AB Synoptic maps of the white-light corona from SOLWIND data are used to determine a synodic rotation rate at 3.5 R. for the interval 1979 to 1985. The rotation rate is rigid compared with that of the photospheric magnetic field, and agrees with that of the coronal magnetic field as determined from a current-free model. This validates the use of the current-free approximation for estimating the average rotation rate of the coronal magnetic field over long time scales. RP NASH, AG (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 4172N,WASHINGTON,DC 20375, USA. NR 28 TC 7 Z9 7 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 10 PY 1991 VL 366 IS 2 BP 592 EP 598 DI 10.1086/169594 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EP662 UT WOS:A1991EP66200026 ER PT J AU NGAI, KL RENDELL, RW YEE, AF PLAZEK, DJ AF NGAI, KL RENDELL, RW YEE, AF PLAZEK, DJ TI ANTIPLASTICIZATION EFFECTS ON A SECONDARY RELAXATION IN PLASTICIZED GLASSY POLYCARBONATES SO MACROMOLECULES LA English DT Article ID ECHO C-13 NMR; DISSOLVED POLYCARBONATES; LOCAL MOTION; SPIN RELAXATION; POLYMER-SOLUTIONS; MOLECULAR-MOTION; DYNAMICS; VOLUME AB Recent deuteron NMR measurements of secondary relaxations in polycarbonates of Bisphenol A plasticized by addition of small-molecule liquids are analyzed and interpreted. In contrast to the primary relaxation, the effect of plasticizer on the secondary relaxation is observed to increase the mean value and spread of the activation energy and average relaxation time as well as dramatically increase the width of the distribution of correlation frequencies, i.e., antiplasticization. The coupling model of relaxation is applied to this data, taking into consideration the presence of an inhomogeneous distribution of relaxation times as suggested by NMR line-shape data. Essentially the same distribution of primitive relaxation times of the model occurs for both the unplasticized and plasticized samples. Most of the effects from an increased concentration of the plasticizers result from an increase in the coupling parameter n. This results simultaneously in a shift of the mean relaxation time to longer times, an increase in the mean activation energy, and broadening of the loss function. The mean of the primitive distribution can be related to dilute-solution measurements and calculations of the phenyl ring motion of a single chain. These experimental facts are given a consistent explanation by the model leading to a more precise characterization of antiplasticization. C1 UNIV MICHIGAN,DEPT MAT SCI & ENGN,ANN ARBOR,MI 48109. UNIV PITTSBURGH,DEPT MET & MAT ENGN,PITTSBURGH,PA 15213. RP NGAI, KL (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Yee, Albert/E-5398-2010 OI Yee, Albert/0000-0002-5762-6042 NR 46 TC 71 Z9 72 U1 1 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD JAN 7 PY 1991 VL 24 IS 1 BP 61 EP 67 DI 10.1021/ma00001a010 PG 7 WC Polymer Science SC Polymer Science GA ER452 UT WOS:A1991ER45200010 ER PT J AU SERENE, JW AF SERENE, JW TI THE SUPERFLUID PHASES OF HE-3 - VOLLHARDT,D, WOLFLE,P SO SCIENCE LA English DT Book Review RP SERENE, JW (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, 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 4 PY 1991 VL 251 IS 4989 BP 97 EP 98 DI 10.1126/science.251.4989.97 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA EQ603 UT WOS:A1991EQ60300039 PM 17778607 ER PT J AU OBAL, J GROGAN, W AF OBAL, J GROGAN, W GP NIST, NATL COMP SECUR CTR TI A CASE-STUDY FOR THE APPROACH TO DEVELOPING A MULTILEVEL SECURE COMMAND AND CONTROL INFORMATION-SYSTEM SO 14TH NATIONAL COMPUTER SECURITY CONFERENCE - INFORMATION SYSTEMS SECURITY: REQUIREMENTS & PRACTICES, PROCEEDINGS, VOLS 1 AND 2 LA English DT Proceedings Paper CT 14th National Computer Security Conference - Information Systems Security: Requirements and Practices CY OCT 01-04, 1991 CL WASHINGTON, DC SP NIST, NATL COMP SECUR CTR C1 USN BASE,NORFOLK,VA 23511. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NATL INST STANDARDS & TECHNOLOGY PI BOULDER PA 325 BROADWAY, BOULDER, CO 80303-3328 PY 1991 BP 101 EP 109 PG 9 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA BA51M UT WOS:A1991BA51M00011 ER PT J AU MEADOWS, C AF MEADOWS, C GP NIST, NATL COMP SECUR CTR TI INFERENCE PREVENTION IN DATABASES - DATA DESIGN VS QUERY-PROCESSING SO 14TH NATIONAL COMPUTER SECURITY CONFERENCE - INFORMATION SYSTEMS SECURITY: REQUIREMENTS & PRACTICES, PROCEEDINGS, VOLS 1 AND 2 LA English DT Proceedings Paper CT 14th National Computer Security Conference - Information Systems Security: Requirements and Practices CY OCT 01-04, 1991 CL WASHINGTON, DC SP NIST, NATL COMP SECUR CTR RP MEADOWS, C (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NATL INST STANDARDS & TECHNOLOGY PI BOULDER PA 325 BROADWAY, BOULDER, CO 80303-3328 PY 1991 BP 679 EP 679 PG 1 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA BA51M UT WOS:A1991BA51M00077 ER PT J AU SHIRK, JS LINDLE, JR BARTOLI, FJ KAFAFI, ZH SNOW, AW AF SHIRK, JS LINDLE, JR BARTOLI, FJ KAFAFI, ZH SNOW, AW TI NONLINEAR OPTICAL-PROPERTIES OF SUBSTITUTED PHTHALOCYANINES SO ACS SYMPOSIUM SERIES LA English DT Article ID MOLECULAR ASSOCIATION; MONOLAYER FORMATION; PHASE CONJUGATION AB The third order optical susceptibility was measured for a series of transition metal tetrakis(cumylphenoxy)phthalocyanines at 1.064-mu-m. Metal substitution caused a dramatic variation in the third order susceptibility. The largest < gamma-xxxx >'s were found in the Co, Ni, and Pt complexes. Metal substitution introduces low lying electronic states which can enhance the susceptibility in these phthalocyanines. A strategy for enhancing the figure of merit, chi-(3)/alpha, of centrosymmetric nonlinear optical materials is suggested. RP SHIRK, JS (reprint author), USN, RES LAB, WASHINGTON, DC 20375 USA. RI Lindle, James/A-9426-2009 NR 17 TC 22 Z9 22 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0097-6156 J9 ACS SYM SER JI ACS Symp. Ser. PY 1991 VL 455 BP 626 EP 634 PG 9 WC Chemistry, Multidisciplinary SC Chemistry GA FM047 UT WOS:A1991FM04700042 ER PT J AU LITTLE, BJ SIKES, CS AF LITTLE, BJ SIKES, CS TI CORROSION INHIBITION BY THERMAL POLYASPARTATE SO ACS SYMPOSIUM SERIES LA English DT Article ID BEHAVIOR AB Polyanhydroaspartic acid, synthesized by thermal condensation of L-aspartic acid at 190-degrees-C for 24 to 96 hours and converted to polyaspartate by mild alkaline hydrolysis, was evaluated as an inhibitor of corrosion. Inhibitor efficiency was judged on mild steel coupons exposed to salt water by visual inspection and by electrochemical testing. Electrochemical potential, polarization resistance and impedance spectra were evaluated. The mild steel surfaces were examined using scanning electron microscopy/energy-dispersive x-ray spectrometry (SEM/EDAX) before and after exposure. The results indicated that thermal polyaspartate binds to surfaces of mild steel and moderately suppresses both anodic and cathodic corrosion reactions. C1 UNIV SO ALABAMA,CTR MINERALIZAT,MOBILE,AL 36688. RP LITTLE, BJ (reprint author), USN,OCEANOG & ATMOSPHER RES LAB,STENNIS SPACE CTR,MS 39529, USA. NR 38 TC 5 Z9 5 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0097-6156 J9 ACS SYM SER PY 1991 VL 444 BP 263 EP 279 PG 17 WC Chemistry, Multidisciplinary SC Chemistry GA EV849 UT WOS:A1991EV84900021 ER PT J AU CAHILL, RA ZHAO, Y MURPHY, R SALA, A FOEGH, M SPITZER, T DEEG, HJ AF CAHILL, RA ZHAO, Y MURPHY, R SALA, A FOEGH, M SPITZER, T DEEG, HJ TI HIGH URINARY LEUKOTRIENE-E4 (LTE4) AND THROMBOXANE-2 (TXB2) LEVELS ARE ASSOCIATED WITH CAPILLARY LEAK SYNDROME IN BONE-MARROW TRANSPLANT PATIENTS SO ADVANCES IN PROSTAGLANDIN THROMBOXANE AND LEUKOTRIENE RESEARCH LA English DT Review ID CULTURES; RAT C1 GEORGETOWN UNIV,SCH MED,DEPT PEDIAT,WASHINGTON,DC 20007. GEORGETOWN UNIV,SCH MED,DEPT SURG,WASHINGTON,DC 20007. GEORGETOWN UNIV,SCH MED,DEPT MED,WASHINGTON,DC 20007. UNIV COLORADO,DENVER,CO 80206. RP CAHILL, RA (reprint author), USN,MED RES INST,BETHESDA,MD 20815, USA. OI Sala, Angelo/0000-0001-9290-0257 FU NHLBI NIH HHS [HL40069] NR 6 TC 6 Z9 6 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0361-5952 J9 ADV PROSTAG THROMB L JI Adv. Prostag. Thrombox. Leukot. Res. PY 1991 VL 21 BP 525 EP 528 PN A-B PG 4 WC Biochemistry & Molecular Biology; Endocrinology & Metabolism SC Biochemistry & Molecular Biology; Endocrinology & Metabolism GA EL206 UT WOS:A1991EL20600117 PM 1847564 ER PT J AU CRUTCHER, JM LAMM, SH HALL, TA AF CRUTCHER, JM LAMM, SH HALL, TA TI PREVENTION OF HIV TRANSMISSION IN THE WORKPLACE - CATEGORIZATION OF JOBS AND TASKS BY RISK OF HIV-INFECTION SO AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL LA English DT Article C1 CONSULTANTS EPIDEMIOL & OCCUPAT HLTH INC,WASHINGTON,DC 20007. RP CRUTCHER, JM (reprint author), USN,ENVIRONM & PREVENT MED UNIT 6,BOX 112,HONOLULU,HI 96860, USA. NR 15 TC 1 Z9 1 U1 0 U2 1 PU AMER INDUSTRIAL HYGIENE ASSOC PI FAIRFAX PA 2700 PROSPERITY AVE #250, FAIRFAX, VA 22031-4307 SN 0002-8894 J9 AM IND HYG ASSOC J JI Am. Ind. Hyg. Assoc. J. PD JAN PY 1991 VL 52 IS 1 BP A14 EP A16 PG 3 WC Environmental Sciences; Public, Environmental & Occupational Health SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health GA ET952 UT WOS:A1991ET95200008 PM 1996535 ER PT J AU CRUTCHER, JM AF CRUTCHER, JM TI AIDS POLICY FOR THE WORKPLACE - A CASE-STUDY OF BALTIMORE CITY POLICY SO AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL LA English DT Article RP CRUTCHER, JM (reprint author), USN,ENVIRONM & PREVENT MED UNIT 6,BOX 112,HONOLULU,HI 96860, USA. NR 17 TC 1 Z9 1 U1 0 U2 0 PU AMER INDUSTRIAL HYGIENE ASSOC PI FAIRFAX PA 2700 PROSPERITY AVE #250, FAIRFAX, VA 22031-4307 SN 0002-8894 J9 AM IND HYG ASSOC J JI Am. Ind. Hyg. Assoc. J. PD JAN PY 1991 VL 52 IS 1 BP A10 EP A13 PG 4 WC Environmental Sciences; Public, Environmental & Occupational Health SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health GA ET952 UT WOS:A1991ET95200007 PM 1996534 ER PT J AU MCNEILL, JH AF MCNEILL, JH TI WAR AND CONSCIENCE IN THE NUCLEAR-AGE - BAILEY,SD SO AMERICAN JOURNAL OF INTERNATIONAL LAW LA English DT Book Review RP MCNEILL, JH (reprint author), USN,COLL WAR,WASHINGTON,DC 20350, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC INT LAW PI WASHINGTON PA 2223 MASSACHUSETTS AVE N W, WASHINGTON, DC 20008-2864 SN 0002-9300 J9 AM J INT LAW JI Am. J. Int. Law PD JAN PY 1991 VL 85 IS 1 BP 227 EP 228 DI 10.2307/2203591 PG 2 WC International Relations; Law SC International Relations; Government & Law GA FC055 UT WOS:A1991FC05500029 ER PT J AU DEMARCO, JK MCDERMOTT, MW DILLON, WP BOLLEN, A EDWARDS, MS AF DEMARCO, JK MCDERMOTT, MW DILLON, WP BOLLEN, A EDWARDS, MS TI MR APPEARANCE OF POSTOPERATIVE FOREIGN-BODY GRANULOMA - CASE-REPORT WITH PATHOLOGICAL CONFIRMATION SO AMERICAN JOURNAL OF NEURORADIOLOGY LA English DT Article ID CONTRAST ENHANCEMENT; BRAIN C1 UNIV CALIF SAN FRANCISCO,DEPT RADIOL,NEURORADIOL SECT,SAN FRANCISCO,CA 94143. UNIV CALIF SAN FRANCISCO,DEPT NEUROSURG,DIV PEDIAT NEUROSURG,SAN FRANCISCO,CA 94143. UNIV CALIF SAN FRANCISCO,DEPT PATHOL,SAN FRANCISCO,CA 94143. UNIV CALIF SAN FRANCISCO,DEPT PEDIAT,DIV PEDIAT NEUROSURG,SAN FRANCISCO,CA 94143. RP DEMARCO, JK (reprint author), USN HOSP,DEPT RADIOL,SAN DIEGO,CA 92134, USA. NR 14 TC 22 Z9 23 U1 0 U2 0 PU AMER SOC NEURORADIOLOGY PI OAK BROOK PA 2210 MIDWEST RD, OAK BROOK, IL 60521 SN 0195-6108 J9 AM J NEURORADIOL JI Am. J. Neuroradiol. PD JAN-FEB PY 1991 VL 12 IS 1 BP 190 EP 192 PG 3 WC Clinical Neurology; Neuroimaging; Radiology, Nuclear Medicine & Medical Imaging SC Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging GA EN938 UT WOS:A1991EN93800043 PM 1899512 ER PT J AU CONYERS, SM KIDWELL, DA AF CONYERS, SM KIDWELL, DA TI CHROMOGENIC SUBSTRATES FOR HORSERADISH-PEROXIDASE SO ANALYTICAL BIOCHEMISTRY LA English DT Article ID ENZYME-IMMUNOASSAY; REAGENT; ASSAY C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. NR 23 TC 74 Z9 75 U1 1 U2 5 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0003-2697 J9 ANAL BIOCHEM JI Anal. Biochem. PD JAN PY 1991 VL 192 IS 1 BP 207 EP 211 DI 10.1016/0003-2697(91)90208-B PG 5 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA EP711 UT WOS:A1991EP71100036 PM 2048722 ER PT J AU KANG, YH WILLIAMS, R AF KANG, YH WILLIAMS, R TI ENDOTOXIN-INDUCED ENDOTHELIAL INJURY AND SUBENDOTHELIAL ACCUMULATION OF FIBRONECTIN IN RAT AORTA SO ANATOMICAL RECORD LA English DT Article ID TUMOR NECROSIS FACTOR; VASCULAR-PERMEABILITY; CELL ACTIVATION; BACTERIAL ENDOTOXIN; PLASMA FIBRONECTIN; BASEMENT-MEMBRANE; ESCHERICHIA-COLI; RABBIT; INVITRO; LIPOPOLYSACCHARIDE RP KANG, YH (reprint author), USN,MED RES INST,DIV PATHOPHYSIOL,BETHESDA,MD 20814, USA. NR 58 TC 21 Z9 21 U1 0 U2 1 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0003-276X J9 ANAT REC JI Anat. Rec. PD JAN PY 1991 VL 229 IS 1 BP 86 EP 102 DI 10.1002/ar.1092290110 PG 17 WC Anatomy & Morphology SC Anatomy & Morphology GA EL695 UT WOS:A1991EL69500009 PM 1996787 ER PT J AU SUN, HH LOOFT, F MADAN, RN AF SUN, HH LOOFT, F MADAN, RN TI SPECIAL ISSUE - NONLINEAR PHYSIOLOGICAL SYSTEM MODELING - INTRODUCTION SO ANNALS OF BIOMEDICAL ENGINEERING LA English DT Editorial Material C1 WORCESTER POLYTECH INST,WORCESTER,MA 01609. OFF NAVAL RES,ARLINGTON,VA 22217. RP SUN, HH (reprint author), DREXEL UNIV,INST BIOMED ENGN & SCI,PHILADELPHIA,PA 19104, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU BLACKWELL SCIENCE INC PI CAMBRIDGE PA 238 MAIN ST, CAMBRIDGE, MA 02142 SN 0090-6964 J9 ANN BIOMED ENG JI Ann. Biomed. Eng. PY 1991 VL 19 IS 4 BP 341 EP 343 DI 10.1007/BF02584315 PG 3 WC Engineering, Biomedical SC Engineering GA GJ783 UT WOS:A1991GJ78300001 ER PT J AU LOONEY, RE AF LOONEY, RE TI 4 STARS - THE INSIDE STORY OF THE 40-YEAR BATTLE BETWEEN THE JOINT CHIEFS OF STAFF AND AMERICA CIVILIAN LEADERS - PERRY,M SO ANNALS OF THE AMERICAN ACADEMY OF POLITICAL AND SOCIAL SCIENCE LA English DT Book Review RP LOONEY, RE (reprint author), NAVAL POST GRAD SCH,MONTEREY,CA, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU SAGE SCIENCE PRESS 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 JAN PY 1991 VL 513 BP 185 EP 186 DI 10.1177/0002716291513001033 PG 2 WC Political Science; Social Sciences, Interdisciplinary SC Government & Law; Social Sciences - Other Topics GA ER343 UT WOS:A1991ER34300039 ER PT J AU CELII, FG BUTLER, JE AF CELII, FG BUTLER, JE TI DIAMOND CHEMICAL VAPOR-DEPOSITION SO ANNUAL REVIEW OF PHYSICAL CHEMISTRY LA English DT Review DE OPTICAL DIAGNOSTICS; INSITU TECHNIQUES; GROWTH MODELING; GAS-PHASE KINETICS; NUCLEATION ID THERMAL-DESORPTION SPECTRA; OXYGEN-ACETYLENE FLAME; H-ATOM CONCENTRATIONS; BONDED CHAIN MODEL; MIXED GAS PLASMA; THIN-FILMS; MICROWAVE PLASMA; 111 SURFACE; EPITAXIAL-GROWTH; METHANE-HYDROGEN C1 USN,RES LAB,GAS SURFACE DYNAM SECT,WASHINGTON,DC 20375. RP CELII, FG (reprint author), TEXAS INSTRUMENTS INC,CENT RES LABS,DALLAS,TX 75265, USA. RI Butler, James/B-7965-2008 OI Butler, James/0000-0002-4794-7176 NR 228 TC 234 Z9 236 U1 2 U2 44 PU ANNUAL REVIEWS INC PI PALO ALTO PA 4139 EL CAMINO WAY, PO BOX 10139, PALO ALTO, CA 94303-0139 SN 0066-426X J9 ANNU REV PHYS CHEM JI Annu. Rev. Phys. Chem. PY 1991 VL 42 BP 643 EP 684 DI 10.1146/annurev.pc.42.100191.003235 PG 42 WC Chemistry, Physical SC Chemistry GA GM894 UT WOS:A1991GM89400022 ER PT J AU BRILL, D GAUNAURD, G STRIFORS, H WERTMAN, W AF BRILL, D GAUNAURD, G STRIFORS, H WERTMAN, W TI BACKSCATTERING OF SOUND PULSES BY ELASTIC BODIES UNDERWATER SO APPLIED ACOUSTICS LA English DT Article AB This paper studies the scattering interaction of an incident acoustic pulse and an elastic target. The pulse emerges from a distant transducer and can have any arbitrary shape and finite duration. The target is an elastic body, here assumed to be spherical and homogeneous. The Fourier integral representation of the incident pulse is combined with the resonance-scattering representation of the scattered pressure field to yield a filter-type integral that can be viewed as filtering the form function of the scatterer through the spectral window of the incident trasient pulse (ping). We analyze the backscattered pulses when the incident pulses are of three simple types. The analysis is carried out in the frequency and time domains, and results are illustrated with numerical predictions for a variety of instances of increasing complexity and interest. The nature of the backscattered echo is explained in two instances for either short or long pulses. These instances correspond to cases in which the incident pulse has a carrier frequency that either coincides with any of the natural resonances of the submerged sphere or not. The main advantage of short pulses is that they can be used to replicate the (steady state) sonar cross-section of scatterers. Ultimately, if the incident pulse were a delta function in tau, the spectrum of the backscattered pulse would exactly be the form function f-infinity (pi, x) divided by r. The backscattering sonar cross-section (BSCS) would then be represented by \f-infinity (pi, x)\2. For a narrow incident continuous wave (c.w.) pulse in tau (but not infinitely narrow as is the delta function), having a carrier frequency x0, the replication of the BSCS would be accurate up to about the value of x0. Long pulses excite single target resonances and produce echoes that are quite similar to those produced by c.w. incident on targets of more general shapes and lossy (i.e. viscoelastic) composition. RP BRILL, D (reprint author), USN ACAD,DEPT PHYS,ANNAPOLIS,MD 21402, USA. NR 0 TC 14 Z9 17 U1 0 U2 5 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0003-682X J9 APPL ACOUST JI Appl. Acoust. PY 1991 VL 33 IS 2 BP 87 EP 107 DI 10.1016/0003-682X(91)90067-O PG 21 WC Acoustics SC Acoustics GA FN330 UT WOS:A1991FN33000001 ER PT J AU LEADER, JJ AF LEADER, JJ TI LIMIT ORBITS OF A POWER ITERATION FOR DOMINANT EIGENVALUE PROBLEMS SO APPLIED MATHEMATICS LETTERS LA English DT Article AB A variant of the power method is analyzed, and a geometric description of the orbits is given. Comparisons are made to the standard power method. RP LEADER, JJ (reprint author), USN,POSTGRAD SCH,DEPT MATH,MONTEREY,CA 93943, USA. NR 0 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 0893-9659 J9 APPL MATH LETT JI Appl. Math. Lett. PY 1991 VL 4 IS 4 BP 41 EP 44 PG 4 WC Mathematics, Applied SC Mathematics GA FY128 UT WOS:A1991FY12800009 ER PT J AU LEADER, JJ AF LEADER, JJ TI A WEAKLY CHAOTIC ITERATION IN RN SO APPLIED MATHEMATICS LETTERS LA English DT Article AB A weakly chaotic iteration, called the Generalized Theodorus Iteration, is introduced and analyzed with respect to boundedness and asymptotics. An application is made of the discrete version of Hukuwara's Theorem. RP LEADER, JJ (reprint author), USN,POSTGRAD SCH,DEPT MATH,MONTEREY,CA 93943, USA. NR 0 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 0893-9659 J9 APPL MATH LETT JI Appl. Math. Lett. PY 1991 VL 4 IS 4 BP 49 EP 52 DI 10.1016/0893-9659(91)90053-X PG 4 WC Mathematics, Applied SC Mathematics GA FY128 UT WOS:A1991FY12800011 ER PT J AU UHLMANN, JK AF UHLMANN, JK TI AESTHETIC SORTING SO APPLIED MATHEMATICS LETTERS LA English DT Article AB The problem of sorting a sequence of numbers is considered from the perpective of mathematical aesthetics. In particular, a sorting algorithm is developed in which comparisons and exchages of index values are performed implicitly using ordinary arithmetic operators rather than computerish if-then instructions. C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 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 0893-9659 J9 APPL MATH LETT JI Appl. Math. Lett. PY 1991 VL 4 IS 2 BP 57 EP 59 DI 10.1016/0893-9659(91)90169-V PG 3 WC Mathematics, Applied SC Mathematics GA FT971 UT WOS:A1991FT97100015 ER PT J AU UHLMANN, JK AF UHLMANN, JK TI METRIC TREES SO APPLIED MATHEMATICS LETTERS LA English DT Article AB A new multidimensional search structure is described that is able to exploit metric information to efficiently satisfy a large class of proximity queries. C1 USN,RES LAB,DIV INFORMAT TECHNOL,WASHINGTON,DC 20375. NR 3 TC 7 Z9 8 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0893-9659 J9 APPL MATH LETT JI Appl. Math. Lett. PY 1991 VL 4 IS 5 BP 61 EP 62 DI 10.1016/0893-9659(91)90146-M PG 2 WC Mathematics, Applied SC Mathematics GA GG662 UT WOS:A1991GG66200014 ER PT J AU ISAK, SJ GARLAND, BA EYRING, EM KIRKLAND, JP NEISER, RA AF ISAK, SJ GARLAND, BA EYRING, EM KIRKLAND, JP NEISER, RA TI PHOTOACOUSTIC SIGNAL ENHANCEMENT AT VISIBLE AND X-RAY WAVELENGTHS SO APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY LA English DT Article ID PHOTO-ACOUSTIC DETERMINATION; VOLATILE LIQUIDS; SIZE CONSIDERATIONS; OPTICAL-ABSORPTION; SPECTROSCOPY; SOLIDS; CELLS; FREQUENCY; DESIGN; EXAFS C1 USN, RES LAB, CONDENSED MATTER PHYS BRANCH, WASHINGTON, DC 20375 USA. RP UNIV UTAH, DEPT CHEM, SALT LAKE CITY, UT 84112 USA. NR 50 TC 0 Z9 0 U1 1 U2 3 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0721-7269 J9 APPL PHYS B-PHOTO PD JAN PY 1991 VL 52 IS 1 BP 8 EP 13 DI 10.1007/BF00405679 PG 6 WC Physics, Applied SC Physics GA EN337 UT WOS:A1991EN33700002 ER PT J AU LARSON, GE MERRITT, CR AF LARSON, GE MERRITT, CR TI CAN ACCIDENTS BE PREDICTED - AN EMPIRICAL-TEST OF THE COGNITIVE FAILURES QUESTIONNAIRE SO APPLIED PSYCHOLOGY-AN INTERNATIONAL REVIEW-PSYCHOLOGIE APPLIQUEE-REVUE INTERNATIONALE LA English DT Article ID INDIVIDUAL-DIFFERENCES; INTELLIGENCE; ABILITIES RP LARSON, GE (reprint author), USN,CTR PERSONNEL RES & DEV,SAN DIEGO,CA 92152, USA. NR 15 TC 44 Z9 44 U1 1 U2 1 PU PSYCHOLOGY PRESS PI HOVE PA 27 CHURCH RD, HOVE, EAST SUSSEX, ENGLAND BN3 2FA SN 0269-994X J9 APPL PSYCHOL-INT REV JI Appl. Psychol.-Int. Rev.-Psychol. Appl.-Rev. Int. PD JAN PY 1991 VL 40 IS 1 BP 37 EP 45 DI 10.1111/j.1464-0597.1991.tb01356.x PG 9 WC Psychology, Applied SC Psychology GA EX568 UT WOS:A1991EX56800004 ER PT J AU PABUCCUOGLU, V ROZWADOWSKA, MD BROSSI, A CLARK, A HUFFORD, CD GEORGE, C FLIPPENANDERSON, JL AF PABUCCUOGLU, V ROZWADOWSKA, MD BROSSI, A CLARK, A HUFFORD, CD GEORGE, C FLIPPENANDERSON, JL TI OXOAPORPHINE ALKALOIDS - CONVERSION OF LYSICAMINE INTO LIRIODENDRONINE AND ITS 2-O-METHYL ETHER, AND ANTIFUNGAL ACTIVITY SO ARCHIV DER PHARMAZIE LA English DT Article ID CONSTITUENTS AB Pschorr reaction of diazonium salt 7 in aqueous methanolic sulfuric acid afforded, besides lysicamine 2, the orange colored sulfate of oxodibenzopyrrocoline (8). The structure is fully supported by an X-ray analysis of its picrate salt. Selective ether cleavage of lysicamine (2) with 48% HBr afforded a hydrobromide of 9, and free betaine 9 on treatment with pyridine-water. Both compounds methylated on treatment with etherial diazomethane on nitrogen to give the known 2-O,N-dimethylliriodendronine (11). Liriodendronine (10) was obtained from lysicamine (2) on heating with pyridine.HBr at 189-degrees-C, and treatment with pyridine-water, as a dark violet betaine. Betaine 12 was obtained by heating 11.HCl to 200-degrees-C. The quatemary salts of lysicamine, lysicamine methiodide (3) and lysicamine methosulfate (4) were comparable in anticandidal activity to liriodenine (1), but were not as active as liriodenine methiodide (13). C1 UNIV MISSISSIPPI,SCH PHARM,DEPT PHARMACOGNOSY,UNIVERSITY,MS 38677. USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. RP PABUCCUOGLU, V (reprint author), NIDDK,LAC,MED CHEM SECT,BETHESDA,MD 20892, USA. NR 18 TC 10 Z9 10 U1 0 U2 2 PU VCH PUBLISHERS INC PI DEERFIELD BEACH PA 303 NW 12TH AVE, DEERFIELD BEACH, FL 33442-1788 SN 0365-6233 J9 ARCH PHARM JI Arch. Pharm. PD JAN PY 1991 VL 324 IS 1 BP 29 EP 33 DI 10.1002/ardp.19913240109 PG 5 WC Chemistry, Medicinal; Chemistry, Multidisciplinary; Pharmacology & Pharmacy SC Pharmacology & Pharmacy; Chemistry GA EW623 UT WOS:A1991EW62300007 PM 2043039 ER PT J AU NORRIS, JP HERTZ, P WOOD, KS KOUVELIOTOU, C AF NORRIS, JP HERTZ, P WOOD, KS KOUVELIOTOU, C TI ON THE NATURE OF SOFT GAMMA-REPEATERS SO ASTROPHYSICAL JOURNAL LA English DT Article ID HIGH-ENERGY TRANSIENT; RAY BURST CATALOG; 5 MARCH; NEUTRON STARS; COMPTON-SCATTERING; SPECTRAL EVOLUTION; MAGNETIC-FIELDS; ET-AL; ORIGIN; MODEL C1 USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. UNIV ATHENS,DEPT PHYS,ATHENS,GREECE. NR 91 TC 77 Z9 78 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 1 PY 1991 VL 366 IS 1 BP 240 EP 252 DI 10.1086/169556 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EN154 UT WOS:A1991EN15400024 ER PT J AU WEILER, KW JOHNSTON, KJ BEVILACQUA, RM SCHWARTZ, PR HACKET, JP RAAB, AR DENNISON, BK CANNON, WH BOOTH, RS ENCRENAZ, PJ VANARDENNE, A WELCH, WJ AF WEILER, KW JOHNSTON, KJ BEVILACQUA, RM SCHWARTZ, PR HACKET, JP RAAB, AR DENNISON, BK CANNON, WH BOOTH, RS ENCRENAZ, PJ VANARDENNE, A WELCH, WJ TI SUBMILLIMETER OBSERVATIONS FROM SPACE - A SPACE STATION SUBMILLIMETER FACILITY (SSSF) SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article ID RADIO-QUIET; GALAXIES; ORION AB There are many important scientific problems to be attacked in the submillimeter wavelength region including the astrophysics of star formation, the dynamics of protoplanetary systems, the physics of interstellar gas, mass loss from stars, supernovae, the chemical evolution of galaxies, the star formation rates in galaxies, the astrophysics of active galactic nuclei, the deuterium abundance in different astrophysical environments, and the distribution of the cosmic background radiation. However, to effectively explore this wavelength range requires going into space since atmospheric absorption precludes most observations from the ground. As in most areas of astronomy, the twin needs for sensitivity and high redsolution indicate use of an imaging interferometer, but the needed baselines of a few tens-of-meters require a large physical structure. The planned Space Station will provide, for the first time, a platform which is large enough to accommodate a forefront submillimeter synthesis instrument. Such a telescope would open an entirely new wavelength regime to astronomy with the attendant possibilities for unexpected new discoveries. A submillimeter array would also be technically well suited for operation on the Space Station. Second-of-arc resolution at submillimeter wavelengths requires only relatively short baselines; pointing accuracy and tracking stability requirements are relatively crude being determined by the single dish size rather than the array resolution; radio frequency interference (RFI) susceptibility is very low due to the large frequency separation from normal communications bands; emissions from co-orbiting debris, dust, gas, and water vapour are uncorrelated between interferometer elements; baseline stability requirements, while severe, are less stringent than for optical/IR interferometers and can almost certainly be satisfied for existing phase correction and phaseless image restoration techniques; and the technology for the dishes, mounts, receivers, LO/IF systems, and correlators either exists or is a reasonable extrapolation of what already is available on the ground. We consider the applications and possible design of a Space Station based submillimeter array which could be mounted along the main ('Y') axis of the Space Station and use orbital revolution and precession to produce high-resolution synthesis mapping in much the same way ground-based linear arrays do by Earth rotation synthesis. C1 COM DEV LTD,CAMBRIDGE,ONTARIO,CANADA. VIRGINIA POLYTECH INST & STATE UNIV,DEPT PHYS,BLACKSBURG,VA 24061. YORK UNIV,DEPT EARTH & ATMOSPHER SCI,N YORK M3J 1P3,ONTARIO,CANADA. ONSALA SPACE OBSERV,ONSALA,SWEDEN. OBSERV PARIS,F-92190 MEUDON,FRANCE. ECOLE NORM SUPER,F-75231 PARIS 05,FRANCE. UNIV CALIF BERKELEY,RADIO ASTRON LAB,BERKELEY,CA 94720. RP WEILER, KW (reprint author), USN,RES LAB,CTR ADV SPACE SENSING,WASHINGTON,DC 20375, USA. NR 40 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PD JAN PY 1991 VL 175 IS 2 BP 311 EP 333 DI 10.1007/BF00644292 PG 23 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA FA119 UT WOS:A1991FA11900013 ER PT J AU FITZGERALD, JW AF FITZGERALD, JW TI MARINE AEROSOLS - A REVIEW SO ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS LA English DT Article DE MARINE AEROSOLS; PARTICLE SIZE DISTRIBUTION; FINE PARTICLES; GAS-TO-PARTICLE CONVERSION; DIMETHYLSULFIDE; SEA SALT; NON-SEA-SALT SULFATE ID SEA-SALT SULFATE; SIZE DISTRIBUTION; EQUATORIAL PACIFIC; DIMETHYL SULFIDE; BOUNDARY-LAYER; METHANESULFONIC-ACID; SEASONAL-VARIATIONS; ATMOSPHERIC SULFUR; PHOTO-OXIDATION; MINERAL AEROSOL AB The background aerosol in the boundary layer over the remote oceans is not aged continental aerosol but, rather, is largely of marine origin. Total particle concentrations are quite uniform throughout the tropical trade wind regions and normally are in the range of 100-300 cm-3. Precipitation reduces particle concentrations, but there is apparently an in situ source of small particles which allows particle concentrations to recover to their normal background level. The fine particle mode (r < 0.3-mu-m), which comprises 90-95% of the particles but only about 5% of the total mass, consists primarily of non-sea-salt sulfate (nss-sulfate). There is considerable evidence that nss-sulfate, which is present in concentrations ranging from about 0.2 to 1.5-mu-g m-3, is formed by gas-to-particle conversion of the oxidation products of organosulfur gases (principally DMS) emitted by the ocean. The principal gas-to-particle conversion mechanisms are particle formation by homogeneous nucleation of low-volatility gas-phase reaction products, condensation of these products on existing particles, and SO2-to-sulfate conversion in cloud droplets. The submicron portion of the particle size distribution is bimodal with peaks at 0.03-mu-m and 0.1-mu-m radius. The peak at 0.1-mu-m is believed to be due to the growth of CCN-sized particles as a result of incloud SO2-to-sulfate conversion. It has been speculated that the sea-to-air flux of DMS affects the number of CCN and thereby affects cloud droplet size, cloud albedo and, consequently, climate. Coarse particles (r > 0.5-mu-m) are composed primarily of sea salt. The concentration of sea salt shows a strong dependence of wind speed and ranges from about 2-mu-g m-3 to as much as 50-mu-g m-3 or more at wind speeds in excess of 15 m s-1. The background coarse mode also contains smaller amounts of nitrate and mineral dust. The concentration of each of these components is normally less than 5% of the mass of sea salt, although dust concentrations can occasionally equal the sea salt loading during fresh intrusions of continental dust. Nitrate is formed by gas-to-particle conversion but the relative importance of the ocean, the stratosphere and lightning as a source of the nitrogen-containing precursor gases remains uncertain. Since nitrate is not found on the fine mode particles, it probably does not result from condensation of gas-phase reaction products or from aqueous-phase oxidation of NO(x) in cloud droplets. RP USN, RES LAB, ATMOSPHER PHYS BRANCH, WASHINGTON, DC 20375 USA. NR 86 TC 342 Z9 351 U1 8 U2 84 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0004-6981 J9 ATMOS ENVIRON A-GEN PY 1991 VL 25 IS 3-4 BP 533 EP 545 DI 10.1016/0960-1686(91)90050-H PG 13 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA FF358 UT WOS:A1991FF35800002 ER PT J AU DURKEE, PA PFEIL, F FROST, E SHEMA, R AF DURKEE, PA PFEIL, F FROST, E SHEMA, R TI GLOBAL ANALYSIS OF AEROSOL-PARTICLE CHARACTERISTICS SO ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS LA English DT Article DE AEROSOL; CLIMATE; REMOTE SENSING; ATMOSPHERIC RADIATION; AIR SEA INTERACTION ID DIMETHYL SULFIDE; MARINE AEROSOL; EQUATORIAL PACIFIC; SULFUR CYCLE; EL-NINO; OCEAN; PHYTOPLANKTON; ATMOSPHERE; CLIMATE; ALBEDO AB A technique is presented for global analysis of aerosol optical depth using satellite detected radiance from the NOAA AVHRR sensor. The technique also produces a measure of the slope of the aerosol size distribution from the spectral variation of scattered radiance Global-scale summaries of aerosol optical depth and an aerosol particle size index are presented from April 1982 and 1983. The aerosol particle size index pattern from 1982 is compared to ship-measured oceanic dimethylsulfide (DMS) concentrations. Increases in the aerosol particle size index in the tropical Pacific Ocean are shown to be consistent with oceanic concentrations of DMS and subsequent particles formed by oxidation of DMS in the atmosphere. RP DURKEE, PA (reprint author), USN,NAVAL POSTGRAD SCH,DEPT METEOROL,MONTEREY,CA 93943, USA. NR 40 TC 72 Z9 79 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0004-6981 J9 ATMOS ENVIRON A-GEN PY 1991 VL 25 IS 11 BP 2457 EP 2471 DI 10.1016/0960-1686(91)90163-2 PG 15 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA GD148 UT WOS:A1991GD14800006 ER PT J AU SEELY, JF BROWN, CM FELDMAN, U EKBERG, JO KEANE, CJ MACGOWAN, BJ KANIA, DR BEHRING, WE AF SEELY, JF BROWN, CM FELDMAN, U EKBERG, JO KEANE, CJ MACGOWAN, BJ KANIA, DR BEHRING, WE TI WAVELENGTHS AND ENERGY-LEVELS FOR THE NA-I ISOELECTRONIC SEQUENCE Y28+ THROUGH U81+ SO ATOMIC DATA AND NUCLEAR DATA TABLES LA English DT Article ID TRANSITIONS; IONS; SPECTRA; MOLYBDENUM C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,SOLAR PHYS BRANCH,GREENBELT,MD 20771. UNIV LUND,DEPT PHYS,S-22101 LUND,SWEDEN. RP SEELY, JF (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 15 TC 34 Z9 34 U1 0 U2 3 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 JAN PY 1991 VL 47 IS 1 BP 1 EP 15 DI 10.1016/0092-640X(91)90016-W PG 15 WC Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Physics GA EX553 UT WOS:A1991EX55300001 ER PT J AU THOMAS, JR AHLERS, ST SCHROT, J AF THOMAS, JR AHLERS, ST SCHROT, J TI COLD-INDUCED IMPAIRMENT OF DELAYED MATCHING IN RATS SO BEHAVIORAL AND NEURAL BIOLOGY LA English DT Article ID TO-SAMPLE PERFORMANCE; SHORT-TERM-MEMORY; BODY-TEMPERATURE; MODERATE COLD; INTERFERENCE; LIGHT RP THOMAS, JR (reprint author), USN,MED RES INST,DEPT ENVIRONM MED,BETHESDA,MD 20899, USA. NR 30 TC 24 Z9 24 U1 0 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0163-1047 J9 BEHAV NEURAL BIOL JI Behav. Neural Biol. PD JAN PY 1991 VL 55 IS 1 BP 19 EP 30 DI 10.1016/0163-1047(91)80124-W PG 12 WC Behavioral Sciences; Neurosciences; Psychology SC Behavioral Sciences; Neurosciences & Neurology; Psychology GA EN647 UT WOS:A1991EN64700002 PM 1996945 ER PT J AU DOJIRI, M CADIEN, DB PHILLIPS, CA AF DOJIRI, M CADIEN, DB PHILLIPS, CA TI A NEW SPECIES OF AMMOTHELLA (PYCNOGONIDA, AMMOTHEIDAE) FROM DEEP-WATER OFF SAN NICOLAS ISLAND, CALIFORNIA SO BIJDRAGEN TOT DE DIERKUNDE LA English DT Article DE PYCNOGONIDA; AMMOTHEIDAE; AMMOTHELLA; SAN NICOLAS ISLAND; CHANNEL ISLANDS; SOUTHERN CALIFORNIA AB Ammothella killix n. sp. is described from upper bathyal depths on the Cortez Ridge; it is the tenth in the genus from the eastern Pacific, and sixth from California. It differs from its congeners most noticeably in having chelifore fusion, and in bearing slender spiny tubercles on all of the following parts: the chelifore scapes, ocular tubercle, abdomen, lateral processes, first coxae, mid-dorsal surface, and anterior cephalic corners. A key to the species of adult Ammothella from California waters is included. C1 USN,MARINE BIOL LAB,LOS ANGELES CTY SANITATION DIST,CARSON,CA 90745. RP DOJIRI, M (reprint author), BIOL LAB,HYPER TREATMENT PLANT,12000 VISTA MAR,PLAYA REY,CA 90293, USA. NR 23 TC 1 Z9 1 U1 0 U2 0 PU ARTIS LIBRARY COMMITTEE PI AMSTERDAM PA UNIVERSITEIT VAN AMSTERDAM PLANTAGE MIDDENLAAN 45A, 1018 AMSTERDAM, NETHERLANDS SN 0067-8546 J9 BIJDR DIERKD JI Bijdr. Tot Dierkunde PY 1991 VL 61 IS 1 BP 31 EP 41 PG 11 WC Zoology SC Zoology GA FV783 UT WOS:A1991FV78300003 ER PT J AU STADTMAN, TC DAVIS, JN CHING, WM ZINONI, F BOCK, A AF STADTMAN, TC DAVIS, JN CHING, WM ZINONI, F BOCK, A TI AMINO-ACID-SEQUENCE ANALYSIS OF ESCHERICHIA-COLI FORMATE DEHYDROGENASE (FDHH) CONFIRMS THAT TGA IN THE GENE ENCODES SELENOCYSTEINE IN THE GENE-PRODUCT SO BIOFACTORS LA English DT Article DE FORMATE DEHYDROGENASE; SELENOCYSTEINE; TGA CODON ID GLUTATHIONE-PEROXIDASE; METHANOCOCCUS-VANNIELII; BETA-GALACTOSIDASE; UGA CODON; IDENTIFICATION; PROTEINS; RESIDUE; VECTORS; MOIETY; SITE AB The formate dehydrogenase (FDH(F)) of Escherichia coli is a selenocysteine-containing protein that occurs as a component of the formate-hydrogen lyase complex. The gene encoding this 80 kd polypeptide contains a TGA codon in the open reading frame. Several indirect lines of evidence showed earlier that the selenocysteine residue in the protein is inserted co-translationally in a TGA (UGA) dependent process. Direct proof that the selenocysteine is present in the polypeptide in the position corresponding to TGA as predicted from the gene sequence was obtained by automated amino acid sequence analysis of a Se-75-containing peptide isolated from the protein. Construction of a fusion gene comprising a small segment of the fdhF gene linked to the lacZ gene as reporter greatly facilitated isolation of the selenocysteine-containing protein. Subsequent cleavage of this isolated gene product with endoproteinase Asp-N gave rise to an easily purified small selenocysteine-containing peptide that was amenable to amino acid sequence analysis. C1 NHLBI,BIOCHEM LAB,BETHESDA,MD 20892. USN,INST MED RES,BETHESDA,MD 20814. UNIV MUNICH,LEHRSTUHL MIKROBIOL,W-8000 MUNICH 19,GERMANY. NR 19 TC 20 Z9 21 U1 0 U2 1 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0951-6433 J9 BIOFACTORS JI Biofactors PD JAN PY 1991 VL 3 IS 1 BP 21 EP 27 PG 7 WC Biochemistry & Molecular Biology; Endocrinology & Metabolism SC Biochemistry & Molecular Biology; Endocrinology & Metabolism GA FY086 UT WOS:A1991FY08600003 PM 1829362 ER PT J AU BULTMAN, JD GILBERTSON, RL ADASKAVEG, J AMBURGEY, TL PARIKH, SV BAILEY, CA AF BULTMAN, JD GILBERTSON, RL ADASKAVEG, J AMBURGEY, TL PARIKH, SV BAILEY, CA TI THE EFFICACY OF GUAYULE RESIN AS A PESTICIDE SO BIORESOURCE TECHNOLOGY LA English DT Article DE PARTHENIUM-ARGENTATUM GRAY; GUAYULE RESIN; TERMITES; FUNGI; MARINE BORERS; LIMNORIA; TEREDINIDS; PHOLADS; WOOD PRESERVATION; WOOD PRESERVATIVES AB Researchers from the United States are evaluating the nonrubber-producing extract (resin) of the guayule bush (Parthenium argentatum Gray) as a potential wood protectant against marine and terrestrial wood-destroying organisms in Panama. Wood treated with guayule resin was not attacked, or only lightly attacked, by limnorians (crustacean borers) after 45 months in Limon Bay. After 19 months in the Bay of Panama, treated wood was undamaged by teredinids but heavily damaged by pholads; both are molluscan borers. Treated wood was not attacked by termites of the genus Coptotermes during 33 months of exposure in the Panamanian rain forest. Termites of the genus Heterotermes had not attacked wood treated with guayule resin after 45 months in the Panamanian rain forest. A 20-week laboratory evaluation of guayule resin for efficacy against brown-rot (Gleophyllum trabeum, Antrodia carbonica, Fomitopsis cajanderi, Lentinus ponderosa) and white-rot (Dichomitus squalens, Trametes versicolor, Ganodermas sp) fungi was performed. Statistical analysis revealed a significant inhibition of decay of the treated wood by these organisms. A 12-week laboratory evaluation of guayule resin for efficacy against soft-rot fungi was also conducted. None of the treated wood was damaged by soft-rot fungi. C1 UNIV ARIZONA,TUCSON,AZ 85721. MISSISSIPPI STATE UNIV,MISSISSIPPI STATE,MS 39762. USN,AIR SYST COMMAND,WASHINGTON,DC 20361. RP BULTMAN, JD (reprint author), USN,RES LAB,DIV CHEM,CODE 6127,4555 OVERLOOK AVE SW,WASHINGTON,DC 20375, USA. NR 10 TC 13 Z9 14 U1 0 U2 4 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0960-8524 J9 BIORESOURCE TECHNOL JI Bioresour. Technol. PY 1991 VL 35 IS 2 BP 197 EP 201 DI 10.1016/0960-8524(91)90030-N PG 5 WC Agricultural Engineering; Biotechnology & Applied Microbiology; Energy & Fuels SC Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels GA FF143 UT WOS:A1991FF14300015 ER PT J AU STENGER, DA CRIBBS, DH FARE, TL AF STENGER, DA CRIBBS, DH FARE, TL TI MODULATION OF A GATED ION CHANNEL ADMITTANCE IN LIPID BILAYER-MEMBRANES SO BIOSENSORS & BIOELECTRONICS LA English DT Article DE BIOSENSOR; GATED ION CHANNEL; IMPEDANCE; LIPID BILAYER; ADMITTANCE; VOLTAGE-DEPENDENT ANION CHANNEL ID VDAC AB A future class of amperometric biosensors may utilize gated ion channels such as acetylcholine and glutamate receptors as chemical detection components. In this study, bilayer lipid membranes containing voltage-dependent anion channels (VDAC) were used to model an ion-channel-based biosensor which could continuously monitor AC amperometric changes resulting from induced changes in channel conductance. The in-phase and quadrature components of the induced alternating membrane current were monitored as a function of the applied DC offset voltage which was superimposed on the sinusoidal test voltage. The accuracy and sensitivity of the AC-measured VDAC response was dependent on the magnitude of the AC test voltage relative to the DC offset necessary for channel closure. The VDAC channel appears to be a suitable model protein for AC impedance-based biosensor fabrication. C1 ST MARYS COLL,ST MARYS CITY,MD 20686. RP STENGER, DA (reprint author), USN,RES LAB,CODE 6090,WASHINGTON,DC 20375, USA. NR 13 TC 8 Z9 10 U1 0 U2 1 PU ELSEVIER ADVANCED TECHNOLOGY PI OXFORD PA OXFORD FULFILLMENT CENTRE THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0956-5663 J9 BIOSENS BIOELECTRON JI Biosens. Bioelectron. PY 1991 VL 6 IS 5 BP 425 EP 430 DI 10.1016/0956-5663(91)87007-X PG 6 WC Biophysics; Biotechnology & Applied Microbiology; Chemistry, Analytical; Electrochemistry; Nanoscience & Nanotechnology SC Biophysics; Biotechnology & Applied Microbiology; Chemistry; Electrochemistry; Science & Technology - Other Topics GA FX514 UT WOS:A1991FX51400006 PM 1716918 ER PT J AU ROSSIN, J PETERSEN, E TEVAULT, D LAMONTAGNE, R ISAACSON, L AF ROSSIN, J PETERSEN, E TEVAULT, D LAMONTAGNE, R ISAACSON, L TI EFFECTS OF ENVIRONMENTAL WEATHERING ON THE PROPERTIES OF ASC-WHETLERITE SO CARBON LA English DT Article DE ASC; EDS; WEATHERING; WHETLERITE; XPS AB Activated, impregnated carbon from a radial flow air purification filter was separated into fractions after the filter had been exposed to shipboard environmental conditions for 21 months. Carbon samples from the discrete filter locations were analyzed using surface analysis methods. Breakthrough times of the segregated carbon fractions were recorded for a cyanogen chloride challenge. The inlet portion of the filter was most severely affected by the weathering. For carbon removed from the filter inlet, the weathering process caused impregnants to leach from the granules and form metal sulfates, presumably by reaction with atmospheric SO(x). No sulfur was detected on carbon samples removed from the center and outlet portions of the filter; however, a significant fraction of the chromium (VI) impregnant had been reduced to chromium(III). In all cases, breakthrough times recorded for a cyanogen chloride challenge were significantly less than that recorded for the unweathered carbon sample. C1 USN,RES LAB,WASHINGTON,DC 20375. GEOCENTERS INC,FT WASHINGTON,MD 20744. RP ROSSIN, J (reprint author), USA,CHEM RED DEV & ENGN CTR,AIR PURIFICAT BRANCH,ABERDEEN PROVING GROUND,MD 21010, USA. NR 8 TC 16 Z9 16 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0008-6223 J9 CARBON JI Carbon PY 1991 VL 29 IS 2 BP 197 EP 205 DI 10.1016/0008-6223(91)90070-Y PG 9 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA EW765 UT WOS:A1991EW76500009 ER PT J AU HUSTON, AL REIMANN, CT AF HUSTON, AL REIMANN, CT TI PHOTOCHEMICAL BLEACHING OF ADSORBED RHODAMINE 6G AS A PROBE OF BINDING GEOMETRIES ON A FUSED-SILICA SURFACE SO CHEMICAL PHYSICS LA English DT Article ID FLUORESCENCE; MOLECULES; GLASS AB Photochemical bleaching and polarization-dependent fluorescence measurements were used to probe the adsorption characteristics of submonolayers of rhodamine 6G on a fused silica surface. The presence of three unique binding geometries of adsorbed dye molecules is inferred from the kinetics of the photochemical bleaching reaction, obtained by monitoring the fluorescence yield as a function of irradiation time over a period of 1500-2000 s. Fluorescence from molecules in each distinctive binding geometry is characterized by a unique ratio between its s- and p-polarized components. A theoretical model relates the polarization ratio of the fluorescence to the angle of orientation of the transition dipole with respect to the plane of the surface. The transition dipole angles for the three inferred geometries are 0-degrees, 8-degrees and 16-degrees. The photochemical bleaching cross section of rhodamine 6G is strongly dependent on the orientation of the transition dipole. Possible ways in which the molecules may be physically oriented are discussed. RP HUSTON, AL (reprint author), USN,RES LAB,DIV OPT SCI,CODE 6546,WASHINGTON,DC 20375, USA. NR 17 TC 26 Z9 26 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0301-0104 J9 CHEM PHYS JI Chem. Phys. PD JAN 1 PY 1991 VL 149 IS 3 BP 401 EP 407 DI 10.1016/0301-0104(91)90039-V PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA ER201 UT WOS:A1991ER20100013 ER PT J AU DEITZ, VR AF DEITZ, VR TI NUCLEAR GRADE ACTIVATED CARBONS AND THE RADIOACTIVE IODIDE PROBLEM SO CHEMISTRY AND PHYSICS OF CARBON LA English DT Review C1 USN,RES LAB,SURFACE CHEM BRANCH,WASHINGTON,DC 20375. RP DEITZ, VR (reprint author), GEOCENTERS INC,FT WASHINGTON,MD, USA. NR 104 TC 5 Z9 5 U1 0 U2 0 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0069-3138 J9 CHEM PHYS CARBON JI Chem. Phys. Carbon PY 1991 VL 23 BP 233 EP 362 PG 130 WC Chemistry, Physical; Energy & Fuels; Engineering, Chemical SC Chemistry; Energy & Fuels; Engineering GA GU551 UT WOS:A1991GU55100004 ER PT J AU BERRY, AD HOLM, RT MOWERY, RL TURNER, NH FATEMI, M AF BERRY, AD HOLM, RT MOWERY, RL TURNER, NH FATEMI, M TI GROWTH AND CHARACTERIZATION OF THIN-FILMS OF THALLIUM(III) OXIDE BY ORGANOMETALLIC CHEMICAL VAPOR-DEPOSITION SO CHEMISTRY OF MATERIALS LA English DT Article ID CRYSTALS AB Films containing thallium(III) oxide were grown by organometallic chemical vapor deposition in an oxygen-rich atmosphere on MgO, Al2O3, and Si substrates. Three organothallium precursors were used: thallium acetylacetonate, dimethylthallium acetylacetonate, and cyclopentadienylthallium. Films were characterized by using X-ray diffraction techniques and X-ray photoelectron, Auger electron, and infrared spectroscopies. The results indicate the presence of Tl2O3 as the major component with possible smaller amounts of Tl2CO3. Deposition on Si resulted in the formation of a silicate from interaction between the film and the substrate. RP BERRY, AD (reprint author), USN,RES LAB,CODE 6120,WASHINGTON,DC 20375, USA. NR 31 TC 12 Z9 12 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD JAN-FEB PY 1991 VL 3 IS 1 BP 72 EP 77 DI 10.1021/cm00013a019 PG 6 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA EW486 UT WOS:A1991EW48600020 ER PT J AU PACIOREK, KJL NAKAHARA, JH HOFERKAMP, LA GEORGE, C FLIPPENANDERSON, JL GILARDI, R SCHMIDT, WR AF PACIOREK, KJL NAKAHARA, JH HOFERKAMP, LA GEORGE, C FLIPPENANDERSON, JL GILARDI, R SCHMIDT, WR TI REACTIONS OF TRIS[BIS(TRIMETHYLSILYL)AMINO]ALUMINUM WITH AMMONIA AND PYROLYSIS STUDIES SO CHEMISTRY OF MATERIALS LA English DT Article ID BORON-NITROGEN POLYMERS; MOLECULAR-STRUCTURE; CRYSTAL-STRUCTURES; TRIS(TRIMETHYLSILYL)ALUMINUM; PRECURSORS; CERAMICS AB [[(Me3Si)2N]2AlNH2]2 (1) and [[(Me3Si)2N]2Al(NH2)2]3Al (2) were prepared from reaction of ammonia with Al[N(SiMe3)2]3 in 1:1 and 1:2 mole ratios, respectively. The structures were established by molecular weight, NMR and infrared spectroscopy, and single-crystal X-ray diffraction analysis. [[(Me3Si)2N]2AlNH2]2: monoclinic, P2(1)/c, Z = 4, a = 9.162 (2) angstrom, b = 14.580 (3) angstrom, c = 34.444 (5) angstrom, beta = 94.94 (1)degrees, V = 4584 (2) angstrom 3. The structure shows the presence of a central, planar, approximately square, four-membered ring. Al(1)-N(1)-Al(2)-N(2) with Al(1)-N(1) = 1.944 (5) angstrom, Al(1)-N(2) = 1.926 (5) angstrom, Al(1)-N(1)-Al(2) = 95.3 (2)degrees, N(1)-Al(1)-N(2) = 84.2 (2)degrees. [[(Me3Si)2N]2Al(NH2)2]3Al: monoclinic C2/c, Z = 8, a = 25.993 (3) angstrom, b = 15.092 (2) angstrom, c = 41.084 (5) angstrom, beta = 107.49 (1)degrees, V = 15373 (4) angstrom 3. The structure features a central hexacoordinate Al atom joined to three tetracoordinate Al atoms by NH2 bridges. Thermolysis of 1 at 225-degrees-C gave pentane-soluble [(Me3Si)2NAlNH]4 characterized by mass balance data, molecular weight, and NMR and infrared spectroscopy. Pyrolysis of [(Me3Si)2NAlNH]4 both in vacuo and under ammonia failed to give pure AlN; silicon and carbon were retained. Thermolysis of 2 at 200-degrees-C resulted in a loss of 5HN(SiMe3)2; this process was unaffected by the presence of ammonia. Further pyrolysis in an inert atmosphere gave 6AlN.Si3N4; AlN was formed in ammonia. C1 USN,RES LAB,WASHINGTON,DC 20375. RENSSELAER POLYTECH INST,DEPT MAT ENGN,TROY,NY 12180. RP PACIOREK, KJL (reprint author), ULTRASYST DEF INC,16775 VON KARMAN AVE,IRVING,CA 92714, USA. RI Hoferkamp, Lisa/C-7246-2013 NR 27 TC 52 Z9 52 U1 1 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 JAN-FEB PY 1991 VL 3 IS 1 BP 82 EP 87 DI 10.1021/cm00013a021 PG 6 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA EW486 UT WOS:A1991EW48600022 ER PT J AU JANKIEWICZ, JJ HENNRIKUS, WL HOUKOM, JA AF JANKIEWICZ, JJ HENNRIKUS, WL HOUKOM, JA TI THE APPEARANCE OF THE PIRIFORMIS MUSCLE SYNDROME IN COMPUTED-TOMOGRAPHY AND MAGNETIC-RESONANCE-IMAGING - A CASE-REPORT AND REVIEW OF THE LITERATURE SO CLINICAL ORTHOPAEDICS AND RELATED RESEARCH LA English DT Review AB The piriformis syndrome (PS) is a controversial cause of hip pain because of the lack of objective findings to support the diagnosis. Computed tomography (CT) and magnetic resonance (MR) imaging revealed PS in a 27-year-old woman. This case may be one of the first reports in the literature on a piriformis muscle enlargement documented by CT and MR imaging. C1 USN HOSP,DEPT CLIN INVEST,SAN DIEGO,CA 92134. USN HOSP,DEPT ORTHOPED,SAN DIEGO,CA 92134. NR 24 TC 50 Z9 50 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 JAN PY 1991 IS 262 BP 205 EP 209 PG 5 WC Orthopedics; Surgery SC Orthopedics; Surgery GA ET233 UT WOS:A1991ET23300029 PM 1984918 ER PT J AU MILLER, PJ BLOCK, S PIERMARINI, GJ AF MILLER, PJ BLOCK, S PIERMARINI, GJ TI EFFECTS OF PRESSURE ON THE THERMAL-DECOMPOSITION KINETICS, CHEMICAL-REACTIVITY AND PHASE-BEHAVIOR OF RDX SO COMBUSTION AND FLAME LA English DT Article ID 1,3,5,7-TETRANITRO-1,3,5,7-TETRAAZACYCLOOCTANE; NITROMETHANE; ACTIVATION; EXPLOSIVES; CELL; KBAR AB The effects of pressure on the thermal decomposition kinetics, chemical reactivity, and phase behavior of RDX have been studied by a combination of measurement techniques in conjunction with a high-pressure diamond anvil cell. These techniques include (1) Fourier transform infrared (FTIR) spectroscopy for kinetic measurements and phase identification, (2) energy dispersive x-ray powder diffraction for identification of the observed polymorphic forms and also compression measurements, and (3) optical polarizing microscopy for visual detection and confirmation of phase transformations and determinations of transition pressures. The ruby method of pressure measurement was used in all methods employed. Studies were generally limited to the region where decomposition rates could be measured within reasonable laboratory time, i.e., below 10 GPa and 573 K. The P-T phase diagram for RDX was determined to 573 K and 7.0 GPa, delineating the stability fields of three solid phases, alpha, beta, and gamma, and the liquidus. The alpha and beta phases of RDX were found to thermally decompose, while the gamma phase transformed to either alpha or beta before reaching decomposition temperatures. The decomposition rate of alpha phase was found to increase with increasing pressure, suggesting a bimolecular-type mechanism. An activation energy of 51 kcal/mol and activation volume of -5.6 cm3/mol were calculated for the thermal decomposition reaction of alpha RDX. C1 NATL INST STAND & TECHNOL,INST MAT SCI & ENGN,GAITHERSBURG,MD 20899. RP MILLER, PJ (reprint author), USN,CTR SURFACE WARFARE,WHITE OAK,MD 20910, USA. NR 26 TC 53 Z9 53 U1 3 U2 14 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 JAN PY 1991 VL 83 IS 1-2 BP 174 EP 184 DI 10.1016/0010-2180(91)90211-S PG 11 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA EW535 UT WOS:A1991EW53500013 ER PT J AU KAPLAN, CR ORAN, ES AF KAPLAN, CR ORAN, ES TI MECHANISMS OF IGNITION AND DETONATION FORMATION IN PROPANE AIR MIXTURES SO COMBUSTION SCIENCE AND TECHNOLOGY LA English DT Article DE REACTIVE-FLOW SIMULATIONS; SPONTANEOUS IGNITION; TRANSITION TO DETONATION ID OBSTACLES C1 USN,RES LAB,COMPUTAT PHYS & FLUID DYNAM LAB,WASHINGTON,DC 20375. RP KAPLAN, CR (reprint author), USN,RES LAB,NAVY TECHNOL CTR SAFETY & SURVIVABIL,CODE 6183,WASHINGTON,DC 20375, USA. NR 21 TC 5 Z9 6 U1 0 U2 2 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0010-2202 J9 COMBUST SCI TECHNOL JI Combust. Sci. Technol. PY 1991 VL 80 IS 4-6 BP 185 EP 205 DI 10.1080/00102209108951785 PG 21 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical SC Thermodynamics; Energy & Fuels; Engineering GA HD860 UT WOS:A1991HD86000002 ER PT J AU GUTMARK, E SCHADOW, KC SIVASEGARAM, S WHITELAW, JH AF GUTMARK, E SCHADOW, KC SIVASEGARAM, S WHITELAW, JH TI INTERACTION BETWEEN FLUID-DYNAMIC AND ACOUSTIC INSTABILITIES IN COMBUSTING FLOWS WITHIN DUCTS SO COMBUSTION SCIENCE AND TECHNOLOGY LA English DT Note ID OSCILLATIONS C1 IMPERIAL COLL SCI TECHNOL & MED,DEPT MECH ENGN,THERMOFLUIDS SECT,LONDON SW7 2BX,ENGLAND. RP GUTMARK, E (reprint author), USN,CTR WEAP,DEPT NAVY,CHINA LAKE,CA 93555, USA. OI Gutmark, Ephraim/0000-0001-7816-4257 NR 6 TC 13 Z9 13 U1 0 U2 2 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0010-2202 J9 COMBUST SCI TECHNOL JI Combust. Sci. Technol. PY 1991 VL 79 IS 1-3 BP 161 EP 166 DI 10.1080/00102209108951763 PG 6 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical SC Thermodynamics; Energy & Fuels; Engineering GA GM557 UT WOS:A1991GM55700009 ER PT J AU BARRETT, DJ AF BARRETT, DJ TI DAMPED COMPOSITE STRUCTURES SO COMPOSITE STRUCTURES LA English DT Article AB The use of damped composites in aircraft holds the promise of achieving vibrational-resistant structures at a reduction in structural weight. This accomplishment can only be reached by integrating damping methods into the design process. This paper reports the results of a parametric study that examines the effect of damping applications on the static and dynamic response of structures. In particular, it is found that in spite of the low modulus of commercially available damping materials and the dependence of properties on environmental conditions, damping designs have a broad range of potential application. RP BARRETT, DJ (reprint author), USN,CTR AIR DEV,ADV STRUCT TECHNOL BRANCH CODE 6043,WARMINSTER,PA 18974, USA. NR 0 TC 14 Z9 17 U1 1 U2 4 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0263-8223 J9 COMPOS STRUCT JI Compos. Struct. PY 1991 VL 18 IS 3 BP 283 EP 294 DI 10.1016/0263-8223(91)90037-Y PG 12 WC Materials Science, Composites SC Materials Science GA GA653 UT WOS:A1991GA65300005 ER PT J AU DUTTA, I AF DUTTA, I TI THE NATURE AND EFFECT OF THERMAL RESIDUAL-STRESSES IN DISCONTINUOUS FIBER REINFORCED METAL MATRIX COMPOSITES SO COMPOSITES SCIENCE AND TECHNOLOGY LA English DT Article ID EUTECTIC COMPOSITES; ALUMINUM COMPOSITES AB Thermal residual stresses generated in the matrix of a discontinuous fiber reinforced metal matrix composite during cooling from the solutionizing/fabrication temperature has been calculated for two reinforcement-matrix combinations. The results suggest that the presence of large thermal residual stresses can explain why the experimentally observed contribution of matrix-to-fiber load transfer to the strength of discontinuous composites such as silicon carbide/aluminum is considerably less than that predicted by various shear lag models. It was found that thermal residual stresses can also account for the difference between the proportional limit and the yield strength of discontinuous fiber composites and can explain why the composite yield strength in compression is greater than that in tension. It was also inferred that in composites with weak interfaces, the presence of a residual interfacial shear actually strengthens the interface, especially for composites with elasto-plastic matrices where hydrostatic compression in the matrix next to the interface inhibits crack nucleation and growth. RP DUTTA, I (reprint author), USN,POSTGRAD SCH,DEPT MECH ENGN,MAT SCI GRP,MONTEREY,CA 93943, USA. NR 26 TC 8 Z9 9 U1 0 U2 8 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0266-3538 J9 COMPOS SCI TECHNOL JI Compos. Sci. Technol. PY 1991 VL 41 IS 2 BP 193 EP 213 DI 10.1016/0266-3538(91)90028-N PG 21 WC Materials Science, Composites SC Materials Science GA FB059 UT WOS:A1991FB05900006 ER PT J AU BUTLER, JT AF BUTLER, JT TI LOGGING ON SO COMPUTER LA English DT Editorial Material RP BUTLER, JT (reprint author), NAVAL POST GRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 SN 0018-9162 J9 COMPUTER JI Computer PD JAN PY 1991 VL 24 IS 1 BP 10 EP 10 PG 1 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA ER660 UT WOS:A1991ER66000002 ER PT J AU BERZINS, V AF BERZINS, V TI BLACK-BOX SPECIFICATION IN SPEC SO COMPUTER LANGUAGES LA English DT Article DE BLACK-BOX SPECIFICATIONS; ABSTRACTIONS; SPECIFICATION LANGUAGE; COMPUTER AIDED SOFTWARE ENGINEERING; DISTRIBUTED SYSTEMS; REAL-TIME SYSTEMS ID LARCH SHARED LANGUAGE; ABSTRACTION AB This paper presents a language for giving black-box specifications in the early stages of software design. The underlying computational model combines message passing with temporal events in a precisely defined way. The features of the language, especially those important for large scale design are presented by means of examples. RP BERZINS, V (reprint author), USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943, USA. NR 35 TC 0 Z9 0 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0096-0551 J9 COMPUT LANG JI Comput. Lang. PY 1991 VL 16 IS 2 BP 113 EP 127 DI 10.1016/0096-0551(91)90002-Q PG 15 WC Computer Science, Software Engineering SC Computer Science GA EW766 UT WOS:A1991EW76600002 ER PT J AU CARSON, BH AF CARSON, BH TI ALGORITHMS FOR DETERMINING PLANAR AREA PROPERTIES FROM PERIPHERAL POINTS SO COMPUTERS & EDUCATION LA English DT Article AB The determination of planar properties-cross sectional areas, centroids, moments of inertia, and so forth-plays a central role in the solution of many diverse engineering problems. Despite the increasing availability of computational power to engineers and students alike in recent years with the advent of small desktop computers, however, the traditionally laborious and error-prone methods of making these determinations, involving area decomposition or strip integration, are still being taught to the present generation of engineering students, mostly due to a lack of suitable alternative techniques. These classical methods are found to be particularly difficult to adapt to general computational algorithms. This work presents a novel approach, requiring only the peripheral points of any planar area as inputs, and is ideally suited for numerical methods. It is shown that all planar properties of technical interest can be generated, once and for all, with straightforward algorithms that are readily programmed in any scientific computing language, or adapted to typical spreadsheet formats. These algorithms are fully general and require no decision-making on the part of the user. Various worked examples are presented. RP CARSON, BH (reprint author), USN ACAD,DEPT AEROSP ENGN,ANNAPOLIS,MD 21401, USA. NR 3 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 0360-1315 J9 COMPUT EDUC JI Comput. Educ. PY 1991 VL 16 IS 4 BP 311 EP 321 DI 10.1016/0360-1315(91)90005-C PG 11 WC Computer Science, Interdisciplinary Applications; Education & Educational Research SC Computer Science; Education & Educational Research GA FV991 UT WOS:A1991FV99100005 ER PT J AU LERNER, BT MORELLI, MV AF LERNER, BT MORELLI, MV TI EXTENSIONS OF ALGEBRAIC IMAGE OPERATORS - AN APPROACH TO MODEL-BASED VISION SO COMPUTERS & ELECTRICAL ENGINEERING LA English DT Article; Proceedings Paper CT 3RD BIANNUAL INTERNATIONAL SYMP ON ROBOTS AND MANUFACTURING ( ISRAM ) CY JUL 18-20, 1990 CL BURNABY, CANADA SP NASA, GODDARD SPACE FLIGHT CTR ID HOUGH TRANSFORM; PROCESSOR AB We extend our previous research on a highly structured and compact algebraic representation of grey-level images which can be viewed as fuzzy sets. Addition and multiplication are defined for the set of all grey-level images, which can then be described as polynomials of two variables. Utilizing this new algebraic structure, we have devised an innovative, efficient edge detection scheme. An accurate method for deriving gradient component information from this edge detector is presented. A continuous single-pixel-wide edge as well as inherently parallel global operations are some of the advantages that this edge detector possesses over classical convolution-type edge detectors. Based upon this new edge detection system we have developed a robust method for linear feature extraction by combining the techniques of a Hough transform and a line follower. The major advantage of this feature extractor is its general, object-independent nature. Target attributes, such as line segment lengths, intersections, angles of intersection and endpoints are derived by the feature extraction algorithm and employed during model matching. The algebraic operators are global operations which are easily reconfigured to operate on any size or shape region. This provides a natural platform from which to pursue dynamic scene analysis. We discuss a method for optimizing the linear feature extractor for a general-purpose processor which capitalizes on the spatially reconfigurable nature of the edge detector/gradient component operator. C1 TEXAS TECH UNIV,DEPT ELECT ENGN,OPT SYST LAB,LUBBOCK,TX 79409. USN ACAD,ANNAPOLIS,MD 21402. NASA,GODDARD SPACE FLIGHT CTR,ROBOT LAB,GREENBELT,MD 20771. NR 11 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 0045-7906 J9 COMPUT ELECTR ENG JI Comput. Electr. Eng. PY 1991 VL 17 IS 3 BP 181 EP 190 DI 10.1016/0045-7906(91)90034-W PG 10 WC Computer Science, Hardware & Architecture; Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic SC Computer Science; Engineering GA GP939 UT WOS:A1991GP93900008 ER PT J AU BECKLEHIMER, JL AF BECKLEHIMER, JL TI A FORTRAN PROGRAM FOR COMPUTING BEAM PATTERNS OF GEOPHONE ARRAYS SO COMPUTERS & GEOSCIENCES LA English DT Article DE FORTRAN; GEOPHONE; BEAM PATTERN AB The comparison of seismo-acoustic data as acquired with an array of hydrophones and an array of geophone triplets is not a straightforward procedure. The directional response for each sensor array must be known to compare correctly the array data. The method described here shows how to compute the geophone array response for a CW signal using the product of the hydrophone array response and the response as a result of a single geophone. A FORTRAN program demonstrating this procedure is given along with some examples of array response for both hydrophone and geophone arrays. RP BECKLEHIMER, JL (reprint author), USN OCEANOG & ATMOSPHER RES LAB,MARINE GEOL GEOPHYS BRANCH CODE 362,STENNIS SPACE CTR,MS 39529, USA. NR 2 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 0098-3004 J9 COMPUT GEOSCI JI Comput. Geosci. PY 1991 VL 17 IS 5 BP 633 EP 640 DI 10.1016/0098-3004(91)90035-C PG 8 WC Computer Science, Interdisciplinary Applications; Geosciences, Multidisciplinary SC Computer Science; Geology GA FW266 UT WOS:A1991FW26600002 ER PT J AU DEHAEMER, MJ ZYDA, MJ AF DEHAEMER, MJ ZYDA, MJ TI SIMPLIFICATION OF OBJECTS RENDERED BY POLYGONAL APPROXIMATIONS SO COMPUTERS & GRAPHICS LA English DT Article AB Current technology provides a means to obtain sampled data that digitally describes three-dimensional surfaces and objects. Three-dimensional digitizing cameras can be used to obtain sampled data that maps the surface of three-dimensional figures and models. Data obtained from such sources enable accurate renderings of the original surface. However, the digitizing process often provides much more data than is needed to accurately recreate the surface or object. In order to use such data in real-time visual simulators, a significant reduction in the data needed to accurately render the sampled surfaces is required. The techniques presented were developed to drastically reduce the number of data points required to depict an object without sacrificing the detail and accuracy inherent in the digitizing process. C1 NAVAL POST GRAD SCH,CODE CS,DEPT COMP SCI,MONTEREY,CA 93943. NR 14 TC 63 Z9 65 U1 3 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0097-8493 J9 COMPUT GRAPH JI Comput. Graph. PY 1991 VL 15 IS 2 BP 175 EP 184 DI 10.1016/0097-8493(91)90071-O PG 10 WC Computer Science, Software Engineering SC Computer Science GA FT405 UT WOS:A1991FT40500003 ER PT J AU WRIGHT, M BAKUS, GJ ORTIZ, A ORMSBY, B BARNES, DM AF WRIGHT, M BAKUS, GJ ORTIZ, A ORMSBY, B BARNES, DM TI COMPUTER IMAGE-PROCESSING AND AUTOMATIC COUNTING AND MEASURING OF FOULING ORGANISMS SO COMPUTERS IN BIOLOGY AND MEDICINE LA English DT Article DE IMAGE ANALYSIS; COUNTING; MEASURING; FOULING; BIOFOULING; ANTIFOULING; TUBEWORMS; POLYCHAETE AB The purpose of this study was to optimize the counting and measuring of marine fouling organisms on experimental panels using automated computer techniques. A script was developed that reduced the time required for the counting and measuring of marine fouling tubeworms by at least one order of magnitude over manual counts, with an error of five percent or less. Small, distinct tubeworms can be successfully counted by computer using a correction factor. Measurements of percentage cover or area should be made with larger tubeworms that have overlapping tubes. C1 USN,CIVIL ENGN LAB,PORT HUENEME,CA 93043. RP WRIGHT, M (reprint author), UNIV SO CALIF,DEPT BIOL SCI,LOS ANGELES,CA 90089, USA. NR 10 TC 5 Z9 5 U1 2 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0010-4825 J9 COMPUT BIOL MED JI Comput. Biol. Med. PY 1991 VL 21 IS 3 BP 173 EP 180 DI 10.1016/0010-4825(91)90026-6 PG 8 WC Biology; Computer Science, Interdisciplinary Applications; Engineering, Biomedical; Mathematical & Computational Biology SC Life Sciences & Biomedicine - Other Topics; Computer Science; Engineering; Mathematical & Computational Biology GA GA842 UT WOS:A1991GA84200009 PM 1914447 ER PT J AU ROSENFELD, P GIACALONE, RA KNOUSE, SB DOHERTY, LM VICINO, SM KANTOR, J GREAVES, J AF ROSENFELD, P GIACALONE, RA KNOUSE, SB DOHERTY, LM VICINO, SM KANTOR, J GREAVES, J TI IMPRESSION MANAGEMENT, CANDOR, AND MICROCOMPUTER-BASED ORGANIZATIONAL SURVEYS - AN INDIVIDUAL-DIFFERENCES APPROACH SO COMPUTERS IN HUMAN BEHAVIOR LA English DT Article ID SELF-PRESENTATION; COMPUTER; RELIABILITY; ALCOHOL; ATTITUDE; DRUG C1 UNIV RICHMOND,RICHMOND,VA 23173. UNIV SW LOUISIANA,LAFAYETTE,LA 70504. RP ROSENFELD, P (reprint author), USN,CTR PERSONNEL RES & DEV,CODE 121,SAN DIEGO,CA 92152, USA. NR 43 TC 30 Z9 30 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0747-5632 J9 COMPUT HUM BEHAV JI Comput. Hum. Behav. PY 1991 VL 7 IS 1-2 BP 23 EP 32 DI 10.1016/0747-5632(91)90026-W PG 10 WC Psychology, Multidisciplinary; Psychology, Experimental SC Psychology GA FB470 UT WOS:A1991FB47000003 ER PT J AU MCCARTHY, KM EISHENNAWY, AK AF MCCARTHY, KM EISHENNAWY, AK TI IMPLEMENTING TOTAL QUALITY MANAGEMENT AT THE UNITED-STATES DEPARTMENT-OF-DEFENSE SO COMPUTERS & INDUSTRIAL ENGINEERING LA English DT Article AB This paper examines Total Quality Management (TQM) as defined by Dr. W. Edwards Deming including Deming's fourteen points and explains how the United States' Department of Defense (DOD) defines TQM and why TQM is necessary. It also covers how the DOD is planning on implementing TQM and the policy that has been established as guidance in the implementation process. C1 UNIV CENT FLORIDA,DEPT IND ENGN & MANAGEMENT SYST,ORLANDO,FL 32816. RP MCCARTHY, KM (reprint author), USN,CTR TRAINING SYST,RES PK,ORLANDO,FL 32826, USA. NR 16 TC 3 Z9 3 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-8352 J9 COMPUT IND ENG JI Comput. Ind. Eng. PY 1991 VL 21 IS 1-4 BP 153 EP 157 DI 10.1016/0360-8352(91)90080-P PG 5 WC Computer Science, Interdisciplinary Applications; Engineering, Industrial SC Computer Science; Engineering GA GX313 UT WOS:A1991GX31300028 ER PT J AU KWON, YW AF KWON, YW TI MATERIAL NONLINEAR-ANALYSIS OF COMPOSITE PLATE BENDING USING A NEW FINITE-ELEMENT FORMULATION SO COMPUTERS & STRUCTURES LA English DT Article ID LAMINATED PLATES; DEFORMATION AB An analysis model was developed for the material nonlinear analysis of continuous fiber-reinforced composite plates subject to bending loads. The respective yield criterion and flow rule of each constituent, namely fiber or matrix, can be used in the model instead of those for the globally smeared anisotropic material. The respective stresses occurring on each constituent can also be obtained directly from the present model. The finite element formulation was developed for the analysis model. Some examples of composite plate bending were solved using the present formulation. RP KWON, YW (reprint author), USN,POSTGRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93943, USA. NR 27 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 0045-7949 J9 COMPUT STRUCT JI Comput. Struct. PY 1991 VL 41 IS 5 BP 1111 EP 1117 DI 10.1016/0045-7949(91)90306-7 PG 7 WC Computer Science, Interdisciplinary Applications; Engineering, Civil SC Computer Science; Engineering GA GT924 UT WOS:A1991GT92400027 ER PT J AU MALVAR, LJ HIRONAKA, MC AF MALVAR, LJ HIRONAKA, MC TI HEAT-RESISTANT CONCRETE FOR AIRFIELD PAVEMENTS - PRELIMINARY NUMERICAL STUDY SO COMPUTERS & STRUCTURES LA English DT Article; Proceedings Paper CT 8TH ADINA CONF ( AUTOMATIC DYNAMIC INCREMENTAL NONLINEAR ANALYSIS ) CY JUL 17-19, 1991 CL MIT, CAMBRIDGE, MA HO MIT AB Concrete airfield pavements subjected to the exhaust gas of the F/A-18 aircraft auxiliary power unit experience cracking and spalling. A two-step finite element simulation of the airfield pavement yields the temperature distribution and the consequent stress field. It is shown that normal weight concrete pavements will deteriorate. A parameter study is then carried out to assess the influence of each concrete property on the thermal stress field. From this study, the adequacy of any type of concrete can be determined. In particular, the properties of all-lightweight structural concrete are considered. It is shown that all-lightweight structural concrete may provide a satisfactory solution, even when the pavement is initially frozen. C1 USN,CIVIL ENGN LAB,DIV STRUCT,PORT HUENEME,CA 93043. RP MALVAR, LJ (reprint author), UNIV CALIF DAVIS,DEPT CIVIL ENGN,DAVIS,CA 95616, USA. NR 22 TC 0 Z9 0 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0045-7949 J9 COMPUT STRUCT JI Comput. Struct. PY 1991 VL 40 IS 2 BP 303 EP 311 DI 10.1016/0045-7949(91)90356-Q PG 9 WC Computer Science, Interdisciplinary Applications; Engineering, Civil SC Computer Science; Engineering GA FW554 UT WOS:A1991FW55400012 ER PT J AU DYKA, CT REMONDI, AM MILLWATER, HR AF DYKA, CT REMONDI, AM MILLWATER, HR TI 3D-BOUNDARY ELEMENTS AND THE INTEGRATION OF STRONG SINGULARITIES SO COMPUTERS & STRUCTURES LA English DT Article ID EQUATION METHOD; BOUNDARY; ELASTOSTATICS; FORMULATION AB Through the use of a local polar system and the shape functions, the strong singularities that are present in 3D static elasticity when the source point is within the element are removed before numerical integration. A linear triangular and a quadrilateral element are developed and used in two sample problems. A procedure for a general subtriangle within any type of 3D boundary element is also presented. Quadratic elements are also addressed, and the removal of the remaining strong singularity within a subtriangle through use of the shape functions is demonstrated. C1 GEN DYNAM CORP,DIV ELECT BOAT,GROTON,CT 06340. SW RES INST,SAN ANTONIO,TX 78280. RP DYKA, CT (reprint author), USN,CTR UNDERWATER SYST,NEW LONDON,CT 06320, USA. NR 10 TC 5 Z9 5 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0045-7949 J9 COMPUT STRUCT JI Comput. Struct. PY 1991 VL 39 IS 5 BP 513 EP 523 DI 10.1016/0045-7949(91)90060-Y PG 11 WC Computer Science, Interdisciplinary Applications; Engineering, Civil SC Computer Science; Engineering GA FT452 UT WOS:A1991FT45200015 ER PT J AU NEMES, JA EFTIS, J AF NEMES, JA EFTIS, J TI SEVERAL FEATURES OF A VISCOPLASTIC STUDY OF PLATE-IMPACT SPALLATION WITH MULTIDIMENSIONAL STRAIN SO COMPUTERS & STRUCTURES LA English DT Article ID STRESS RATES; DUCTILE; FRACTURE; SOLIDS; METALS AB A viscoplastic constitutive theory that contains a scalar variable description of damage is applied to a two-dimensional axisymmetric analysis of plate-impact spallation. The model uses the Perzyna viscoplastic constitutive formulation with inclusion of a nonlinear isotropic hardening law that saturates with increasing strain. For ductile metals the damage variable is taken to be the void volume fraction of the polycrystalline solid. The evolution equation for damage is based on the nucleation, growth, and eventual coalesence of the microvoids. A spallation criterion based on critical void volume fraction is utilized. The theory is applied to normal impact of circular plates where the diameter of the flyer is smaller than the diameter of the target. Multidimensional axisymmetric strains are developed where, because of the edge effect of the smaller flyer plate, nonplanar as well as planar waves are generated. The equations for balance of mass and momentum are solved using a Lagrangian finite-element computer program with explicit time integration. Four-noded uniform strain quadrilateral elements are used for the spatial discretization. Numerical simulations of impact are performed over a wide range of initial velocities. Contours of the void volume fraction illustrate the damage threshold and the effect of increasing impact stress on damage evolution. Material damage and spall fracture are also illustrated by plots of the deformed geometry, in which the material softening associated with increase in the void volume fraction results in extensive local deformations that, in effect, simulate the openings that are observed in spalled plates. Additional simulations are performed to study the effect of varying parameters that appear in the microvoid evolution equations. C1 GEORGE WASHINGTON UNIV,DEPT CIVIL MECH & ENVIRONM ENGN,WASHINGTON,DC 20052. RP NEMES, JA (reprint author), USN,RES LAB,DIV MAT SCI & TECHNOL,MECH MAT BRANCH,WASHINGTON,DC 20375, USA. NR 24 TC 7 Z9 7 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0045-7949 J9 COMPUT STRUCT JI Comput. Struct. PY 1991 VL 38 IS 3 BP 317 EP 328 DI 10.1016/0045-7949(91)90109-Y PG 12 WC Computer Science, Interdisciplinary Applications; Engineering, Civil SC Computer Science; Engineering GA EZ893 UT WOS:A1991EZ89300007 ER PT J AU CHASE, GG GLAD, WE KNOEBEL, TA AF CHASE, GG GLAD, WE KNOEBEL, TA TI TRANSGRANULAR AND INTERGRANULAR CORROSION OF 18CR-3NI-12MN STAINLESS-STEEL IMMERSED IN SEAWATER SO CORROSION LA English DT Article DE INTERGRANULAR CORROSION; MANGANESE STAINLESS STEELS; NITROGEN-STRENGTHENED STAINLESS STEELS; SEAWATER CORROSION; TRANSGRANULAR CORROSION AB Severe corrosion was observed in samples of 18Cr-3Mi-12Mn stainless steel hot-rolled plate after immersion for several weeks in free-flowing seawater of ambient temperature. The corrosion began on edge cuts as pit corrosion at inclusion stringers and developed into a mixed mode of transgranular cracking and intergranular corrosion. This paper presents microstructure observations of corrosion test samples made with macrophotography, optical microscopy, scanning electron microscopy, and energy dispersion x-ray analysis. RP CHASE, GG (reprint author), USN,NAVAL OCEAN SYST CTR,CODE 932,SAN DIEGO,CA 92152, USA. NR 15 TC 0 Z9 0 U1 0 U2 2 PU NATL ASSN CORROSION ENG PI HOUSTON PA 1440 SOUTH CREEK DRIVE, HOUSTON, TX 77084-4906 SN 0010-9312 J9 CORROSION JI Corrosion PD JAN PY 1991 VL 47 IS 1 BP 74 EP 79 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA HC473 UT WOS:A1991HC47300012 ER PT J AU SHIFLER, DA MORAN, PJ KRUGER, J AF SHIFLER, DA MORAN, PJ KRUGER, J TI THE PASSIVITY OF IRON AND CARBON-STEEL IN ANHYDROUS PROPYLENE CARBONATE SOLUTIONS SO CORROSION SCIENCE LA English DT Article ID ELECTROCHEMICAL-BEHAVIOR; LITHIUM CELLS; ELECTROLYTES; WATER; ASSOCIATION; OXIDATION; SOLVATION AB The passivation behavior of high purity iron and 1018 carbon steel in anhydrous propylene carbonate (PC) containing 0.5 M LiClO4 or 0.5 M LiAsF6 was studied. The air-formed film on Fe was stable and protective over a wide applied potential range in perchlorate solutions. Scratch tests showed that both bare Fe and steel passivate in the anhydrous PC solutions of either electrolyte by chemisorption of PC molecules below the oxidation potential of PC (PC(ox). At higher potentials, bare Fe passivates in PC/LiClO4 via the formation of a Fe(ClO4)2 salt film. The air-formed film on carbon steel was protective up to the PC(ox) potential in either electrolyte. Above PC(ox), deterioration of the air-formed film on steel was associated with sulfide surface inclusions. Pits initiated and grew at these inclusion sites. Scratch tests showed slower repassivation of the bare steel by the Fe(ClO4)2 salt film than on iron. Sulfides impeded this repassivation. Above PC(ox), neither the iron or the steel are in passive in PC/LiAsF6 solutions. The higher solubility of the Fe(AsF6)2 salt prevents precipitation of a protective salt film. C1 USN ACAD,DEPT MECH ENGN,ANNAPOLIS,MD 21402. RP SHIFLER, DA (reprint author), JOHNS HOPKINS UNIV,DEPT MAT SCI & ENGN,CORROS & ELECTROCHEM RES LAB,BALTIMORE,MD 21218, USA. NR 53 TC 17 Z9 17 U1 2 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0010-938X J9 CORROS SCI JI Corrosion Sci. PY 1991 VL 32 IS 5-6 BP 475 EP 496 DI 10.1016/0010-938X(91)90102-U PG 22 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA FG165 UT WOS:A1991FG16500001 ER PT J AU SHAW, BA MORAN, PJ GARTLAND, PO AF SHAW, BA MORAN, PJ GARTLAND, PO TI THE ROLE OF OHMIC POTENTIAL DROP IN THE INITIATION OF CREVICE CORROSION ON ALLOY-625 IN SEAWATER SO CORROSION SCIENCE LA English DT Article ID STAINLESS-STEELS; LOCALIZED CORROSION; SEA-WATER; NICKEL-ALLOYS; BEHAVIOR; RESISTANCE; MECHANISM; ENVIRONMENTS; TYPE-304; TESTS AB Analysis of the literature reveals that little attention has been paid to the role that IR, or ohmic potential, drop plays in initiating crevice corrosion. In the following paper experimental evidence supporting an IR-induced crevice corrosion mechanism for alloy 625 in seawater is presented and discussed. Depassivation of the metal within the crevice results when the IR drop down the crevice becomes large enough to force the crevice to reside at a potential where passivity is destroyed and active dissolution of the metal occurs. C1 USN ACAD,DEPT MECH ENGN,ANNAPOLIS,MD 21402. RP SHAW, BA (reprint author), PENN STATE UNIV,DEPT ENGN SCI & MECH,UNIVERSITY PK,PA 16802, USA. NR 67 TC 54 Z9 54 U1 2 U2 11 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0010-938X J9 CORROS SCI JI Corrosion Sci. PY 1991 VL 32 IS 7 BP 707 EP 719 DI 10.1016/0010-938X(91)90085-4 PG 13 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA FL767 UT WOS:A1991FL76700004 ER PT J AU NATISHAN, PM MCCAFFERTY, E HUBLER, GK AF NATISHAN, PM MCCAFFERTY, E HUBLER, GK TI THE CORROSION BEHAVIOR OF MO-AL, CR-AL AND CR-MO-AL SURFACE ALLOYS PRODUCED BY ION-BEAM MIXING AND ION-IMPLANTATION SO CORROSION SCIENCE LA English DT Article ID STAINLESS-STEELS; MECHANISM; ALUMINUM AB The corrosion behavior of Mo-Al, Cr-Al and Cr-Mo-Al surface alloys produced by ion implantation and ion beam mixing was examined in de-aerated, 0.1 M NaCl. The polarization behavior of the ion implanted samples was similar to that of Al, and the pitting potentials of the ion implanted samples were 115-155 mV higher than that of Al. From the standpoint of the pH of zero charge model, this behavior would be explained by the presence of the implanted cations in the stable oxide lattice. There was incomplete mixing of the coating and substrate for the ion beam mixed samples, and the mixed elements remained almost entirely in the metallic state so that the desired mixed oxide films were not formed. Ion beam mixing did impart additional stability compared to as-deposited samples because the mixing process produced more compact, less porous coatings. RP NATISHAN, PM (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 14 TC 24 Z9 24 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0010-938X J9 CORROS SCI JI Corrosion Sci. PY 1991 VL 32 IS 7 BP 721 EP 731 DI 10.1016/0010-938X(91)90086-5 PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA FL767 UT WOS:A1991FL76700005 ER PT J AU BRYDEN, HL KINDER, TH AF BRYDEN, HL KINDER, TH TI STEADY 2-LAYER EXCHANGE THROUGH THE STRAIT OF GIBRALTAR SO DEEP-SEA RESEARCH PART A-OCEANOGRAPHIC RESEARCH PAPERS LA English DT Article ID MEDITERRANEAN-SEA; HYDRAULICS; FLOW; CONTRACTION AB Recent progress in steady hydraulic control modeling of the two-layer flow through the Strait of Gibraltar is reviewed. An application of the model is made to the specific physical configuration of the Strait using the most recent bathymetry. The maximal exchange solution resulting from the model must satisfy mass and salt conversation relations for the Mediterranean Basin. Hence, it is not possible to specify arbitrarily the density difference between the inflowing and outflowing layers, and the proper reservoir condition is a specification of the net evaporation over the Mediterranean Basin. For a specified evaporation, both the magnitude of the maximum two-layer exchange and the density or salinity difference between the inflowing Atlantic water and outflowing Mediterranean water can be determined from the combination of the hydraulic control model and mass and salt conservation statements. For net evaporation values between 50 and 70 cm y-1, the predicted inflow, outflow and salinity difference are in reasonable agreement with recent observations. In particular, for a net evaporation of 60 cm y-1, the steady hydraulic control model yields a predicted inflow of 0.92 x 10(6) m3 s-1, an outflow of 0.88 x 10(6) m3 s-1 and a salinity difference of 2.0 parts per thousand. For comparison, recent observations exhibit an inflow of 0.95 x 10(6) m3 s-1, an outflow of 0.79 x 10(6) m3 s-1 and an effective salinity difference of 2.1 parts per thousand. C1 USN,OFF RES,ARLINGTON,VA 22217. USN ACAD,ANNAPOLIS,MD 21402. RP BRYDEN, HL (reprint author), WOODS HOLE OCEANOG INST,DEPT PHYS OCEANOG,WOODS HOLE,MA 02543, USA. NR 29 TC 90 Z9 90 U1 1 U2 10 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0198-0149 J9 DEEP-SEA RES PY 1991 VL 38 SU 1 BP S445 EP S463 PG 19 WC Oceanography SC Oceanography GA GD479 UT WOS:A1991GD47900020 ER PT J AU LUNDY, GM MILLER, RE AF LUNDY, GM MILLER, RE TI SPECIFICATION AND ANALYSIS OF A DATA TRANSFER PROTOCOL USING SYSTEMS OF COMMUNICATING MACHINES SO DISTRIBUTED COMPUTING LA English DT Article DE COMMUNICATION PROTOCOL; FORMAL MODEL; SPECIFICATION; ANALYSIS; FORMAL DESCRIPTION TECHNIQUE AB A model for communication protocols called systems of communicating machines is used to specify a data transfer protocol with variable window size (e.g., HDLC), which is an arbitrary nonnegative integer, and to analyze it for freedom from deadlocks. The model uses a combination of finite state machines and variables. This allows the size of the specification (i.e., number of states and variables) to be linear in the window size, a considerable reduction from the pure finite state machine model. A new type of analysis is demonstrated which we call system state analysis. This is similar to the reachability analysis used in the pure finite state model, but it provides substantial simplication by reducing the number of states generated. For example, with the protocol in this paper, if w is the window size, then the global analysis produces O(w5) states, while the system state analysis produces O(w3) states. The system state analysis is then combined with an inductive proof, extending the analysis to all nonnegative integers w. C1 UNIV MARYLAND,DEPT COMP SCI,COLLEGE PK,MD 20742. NASA,GODDARD SPACE FLIGHT CTR,CTR EXCELLENCE SPACE DATA & INFORMAT SCI,GREENBELT,MD 20771. RP LUNDY, GM (reprint author), USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943, USA. NR 42 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0178-2770 J9 DISTRIB COMPUT JI Distrib. Comput. PY 1991 VL 5 IS 3 BP 145 EP 157 DI 10.1007/BF02252957 PG 13 WC Computer Science, Theory & Methods SC Computer Science GA GV414 UT WOS:A1991GV41400004 ER PT J AU CENA, V HALPERIN, JI YEANDLE, S KLEIN, DC AF CENA, V HALPERIN, JI YEANDLE, S KLEIN, DC TI NOREPINEPHRINE STIMULATES POTASSIUM EFFLUX FROM PINEALOCYTES - EVIDENCE FOR INVOLVEMENT OF BIOCHEMICAL AND GATE OPERATED BY CALCIUM AND ADENOSINE-3',5'-MONOPHOSPHATE SO ENDOCRINOLOGY LA English DT Article ID PROTEIN KINASE-C; SEROTONIN N-ACETYLTRANSFERASE; BETA-ADRENERGIC STIMULATION; PHOTONEURAL REGULATION; RAT PINEALOCYTES; SKELETAL-MUSCLE; CELL-MEMBRANE; K+ CHANNELS; PHOSPHORYLATION; RECTIFICATION AB Biochemical studies of K+ efflux from rat pinealocytes revealed for the first time that norepinephrine (NE) increases Rb-86(+) and K-42(+) efflux. The effects of NE depend upon concurrent activation of both alpha1- and beta-adrenoceptors. This effect is mediated by cAMP and Ca2+, which appear to act in conjunction to control K+ efflux; studies with charybdotoxin and tetraethylammonium indicate that a Ca2+ -sensitive K+ channel (K(ca)) appears to be involved. Patch clamp studies identified a large conductance (approximately 100 psec) K+ channel. This study also revealed for the first time that NE treatment increases the fraction of time that this channel was open. Studies of inside-out pineal membrane patches indicated that increasing Ca2+ at the cytoplasmic surface of the membrane increased the frequency of channel opening, as is typical of K(Ca) channels in this type of preparation. Outward K+ currents were almost completely blocked by tetraethylammonium (10 mM) and scorpion venom (L. quinquestriatum; 100 ng/ml). Cell-attached studies confirm that the effects of NE are mediated by intracellular second messengers. These investigations suggest that NE elevates K+ flux, probably through a large conductance K(Ca) channel, that NE acts through alpha1- and beta-adrenergic receptors, and that Ca2+ and cAMP act together through a biochemical "AND" gate to mediate the effects of receptor activation. Activation of this K(Ca) channel would have a hyperpolarizing influence and might contribute to the adrenergic hyperpolarization of pinealocytes. C1 NICHHD,NEUROENDOCRINOL SECT,DEV NEUROBIOL LAB,BLDG 36-4A07,BETHESDA,MD 20892. USN,BETHESDA NAVAL MED CTR,DEPT IMMUNOBIOL & TRANSPLANTAT,BETHESDA,MD 20814. NR 40 TC 20 Z9 20 U1 0 U2 0 PU ENDOCRINE SOC PI BETHESDA PA 4350 EAST WEST HIGHWAY SUITE 500, BETHESDA, MD 20814-4110 SN 0013-7227 J9 ENDOCRINOLOGY JI Endocrinology PD JAN PY 1991 VL 128 IS 1 BP 559 EP 569 PG 11 WC Endocrinology & Metabolism SC Endocrinology & Metabolism GA EQ492 UT WOS:A1991EQ49200076 PM 1846112 ER PT J AU WU, C AF WU, C TI SPECIFIC POWER BOUND OF REAL HEAT ENGINES SO ENERGY CONVERSION AND MANAGEMENT LA English DT Article AB Industrial heat engine optimization usually takes the form of determining minimum heat exchanger area per unit net power or minimum cost per unit net power rather than the form of maximum efficiency. A specific power, power per unit total heat exchanger surface area, is adopted to be the objective function for engine optimization in this paper. Specific power output of an irreversible heat engine coupled with its heat source and sink is analyzed. When time is explicitly considered in the energy exchanges between the engine and its surroundings, it is found that there is an upper bound on the specific power output of the engine. This bound can guide the evaluation of existing real heat engines or influence the design of future heat engines. RP WU, C (reprint author), USN,DEPT MECH ENGN,ANNAPOLIS,MD 21402, USA. NR 0 TC 19 Z9 23 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0196-8904 J9 ENERG CONVERS MANAGE JI Energy Conv. Manag. PY 1991 VL 32 IS 3 BP 249 EP 253 DI 10.1016/0196-8904(91)90128-6 PG 5 WC Thermodynamics; Energy & Fuels; Mechanics SC Thermodynamics; Energy & Fuels; Mechanics GA GD521 UT WOS:A1991GD52100006 ER PT J AU WU, C AF WU, C TI POWER OPTIMIZATION OF AN ENDOREVERSIBLE BRAYTON GAS HEAT ENGINE SO ENERGY CONVERSION AND MANAGEMENT LA English DT Article AB The power output of a simple endoreversible Brayton gas heat engine is analyzed and optimized. The endoreversible engine is defined as a power cycle in which the two processes of heat transfer from and to the surrounding heat reservoirs are the only irreversible processes in the Brayton cycle. A mathematical expression is derived for the power output of the irreversible heat engine. The power optimization provides the basis for designing a real gas heat engine and for a performance comparison with existing Brayton power plants. RP WU, C (reprint author), USN,DEPT MECH ENGN,ANNAPOLIS,MD 21402, USA. NR 0 TC 35 Z9 38 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0196-8904 J9 ENERG CONVERS MANAGE JI Energy Conv. Manag. PY 1991 VL 31 IS 6 BP 561 EP 565 DI 10.1016/0196-8904(91)90091-V PG 5 WC Thermodynamics; Energy & Fuels; Mechanics SC Thermodynamics; Energy & Fuels; Mechanics GA FG550 UT WOS:A1991FG55000007 ER PT J AU MATIC, P KIRBY, GC JOLLES, MI FATHER, PR AF MATIC, P KIRBY, GC JOLLES, MI FATHER, PR TI DUCTILE ALLOY CONSTITUTIVE RESPONSE BY CORRELATION OF ITERATIVE FINITE-ELEMENT SIMULATION WITH LABORATORY VIDEO IMAGES SO ENGINEERING FRACTURE MECHANICS LA English DT Article ID SHEAR BAND FORMATION; STRAIN-RATE; PLASTIC INSTABILITY; FLOW LOCALIZATION; UNIAXIAL TENSION; NECK PROPAGATION; SOLID POLYMERS; PLANE-STRAIN; BEHAVIOR; FRACTURE AB The accurate description of material response consists of a material constitutive formulation and material parameter values. The reduction of material test specimen load versus displacement data to constitutive parameters is often precluded by inelastic material response and deformation inhomogeneity within the specimen. For ductile engineering alloys, these effects are influenced by specimen geometry and must be uncoupled from specimen geometry to characterize the large strain material response. The accuracy of material parameters at such strains should be demonstrated for subsequent applications to design and analysis. Iterative solution for material constitutive parameters is discussed in the investigation. The use of video processing of laboratory tensile test specimens is combined with successive computational simulations of the specimen responses. The solution for HSLA-80 steel constitutive parameters, in the context of incremental plasticity theory, is presented. The material response is treated as the unknown in the computational simulations. It is iteratively modified to achieve correlation with the laboratory experiments. Two different specimen length-to-diameter aspect ratios are utilized to ensure the geometry independence of the material solution and to facilitate efficient solution. The constitutive iteration sequence illustrates the sensitivity of specimen response to material nonlinearity. C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. RP MATIC, P (reprint author), USN,RES LAB,DIV MAT SCI & TECHNOL,MECH MAT BRANCH CODE 6382,WASHINGTON,DC 20375, USA. NR 42 TC 9 Z9 9 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0013-7944 J9 ENG FRACT MECH JI Eng. Fract. Mech. PY 1991 VL 40 IS 2 BP 395 EP 419 DI 10.1016/0013-7944(91)90273-4 PG 25 WC Mechanics SC Mechanics GA GL871 UT WOS:A1991GL87100014 ER PT J AU KWON, YW DUTTON, R AF KWON, YW DUTTON, R TI BOUNDARY ELEMENT ANALYSIS OF CRACKS NORMAL TO BIMATERIAL INTERFACES SO ENGINEERING FRACTURE MECHANICS LA English DT Article AB The singularity of stress at the tip of a crack, which is normal to the interface of two different materials, varies depending on the material properties of the two materials. A subdomain boundary element technique is used to solve the interface crack problems. A shape function, containing the same order of singularity as that in the interface cracks, is used for the interpolation of tractions, and a correct order of shape function is also used for displacements. Some numerical examples show that the present analyses yield good solutions for these interface crack problems. C1 UNIV MISSOURI,DEPT CERAM ENGN,ROLLA,MO 65401. RP KWON, YW (reprint author), USN,POSTGRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93943, USA. NR 8 TC 6 Z9 6 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0013-7944 J9 ENG FRACT MECH JI Eng. Fract. Mech. PY 1991 VL 40 IS 3 BP 487 EP 491 DI 10.1016/0013-7944(91)90145-Q PG 5 WC Mechanics SC Mechanics GA GP601 UT WOS:A1991GP60100002 ER PT J AU KIRBY, GC MATIC, P AF KIRBY, GC MATIC, P TI A COMPLEX-SYSTEMS APPROACH TO METALLIC FRACTURE SURFACE CHARACTERIZATION SO ENGINEERING FRACTURE MECHANICS LA English DT Article ID CELLULAR AUTOMATA; PHASE-TRANSITIONS; MECHANICS; MICROSTRUCTURE; FRACTOGRAPHY; TOPOGRAPHY; POROSITY; FAILURE; DAMAGE; STEEL AB The physical scale of observation and the mathematical formalism of description are important choices for the modeling of physical phenomena. The role of local interactions in relating complex features at different scales in inelastic material fracture is important since material damage has local origins while fracture is a large scale event. In this investigation, the relationship between large scale and small continuum scale fracture surface features are quantified in terms of local, small scale interactions. Experimental measurements of local fracture surface orientation were obtained from processing video images of the fracture surface under different illumination directions. The image processing mapped pixel intensities into a set of three local fracture surface inclination classes defined with respect to the macroscopic surface normal and crack growth direction. Stochastic cellular automaton parameters were identified from the processed image of local inclination classes for use in subsequent simulation. Physical consistency of the parameters with respect to symmetry under spatial reflection was demonstrated. Synthetic processed images were generated using two different types of initial conditions. The processed and synthetic processed images contained similar proportions and features of self-organization, as compared to random images, yet were relatively insensitive to initial conditions of the simulations. This is consistent with the local uniqueness and global reproducibility associated with the mechanics of fracture. Through this approach, the ability to determine the dominant local interaction scale and the global scale of self-organization from experiment should complement analytical modeling of the fracture process. This method of analysis serves to identify features on the fracture surface for additional scrutiny by higher resolution experimental methods. RP KIRBY, GC (reprint author), USN,RES LAB,MECH MAT BRANCH CODE 6382,WASHINGTON,DC 20375, USA. NR 29 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 0013-7944 J9 ENG FRACT MECH JI Eng. Fract. Mech. PY 1991 VL 40 IS 6 BP 1105 EP 1122 DI 10.1016/0013-7944(91)90175-Z PG 18 WC Mechanics SC Mechanics GA GY640 UT WOS:A1991GY64000013 ER PT J AU KIRK, MT DODDS, RH AF KIRK, MT DODDS, RH TI AN ANALYTICAL AND EXPERIMENTAL COMPARISON OF JI-VALUES FOR SHALLOW THROUGH AND PART-THROUGH SURFACE CRACKS SO ENGINEERING FRACTURE MECHANICS LA English DT Article ID TOUGHNESS; FRACTURE; STRESS AB The use of initiation fracture toughness (J(i)) values measured using standard deep crack single edge notch bend, SE(B), specimens in fracture integrity assessments of shallow part through surface flaws frequently leads to under predictions of structural reserve capacity against fracture. To determine if the ratio of the J-integral to the crack tip opening displacement (m factor) can be used to judge the expected comparability of J(i)-values appropriate to different crack geometries, dynamic J(i)-values were measured using three different test specimen types. These included both laboratory specimens, shallow and deep crack SE(B), and a specimen having a shallow part-through semi-elliptical surface crack intended to represent that which might be encountered in service. Comparisons between the J(i)-values measured using these three specimens were conducted for pre-initiation deformation conditions ranging from small scale to gross section yielding so that the effect of material toughness on J(i) similarity could be assessed. These comparisons indicated that specimen geometries which have similar m factors also have approximately the same resistance to crack initiation. Additionally, it was demonstrated that matching m factors was not needed to ensure similarity of J(i)-values if specimen failure occurs under conditions approximating small scale yielding. This information suggests that the m factor may be useful for selecting test specimens which can provide fracture initiation toughness measurements appropriate for use in structural defect assessments. C1 UNIV ILLINOIS,CIVIL ENGN,URBANA,IL 61801. RP KIRK, MT (reprint author), USN,DAVID TAYLOR RES CTR,FATIGUE & FRACTURE BRANCH,CODE 2814,ANNAPOLIS,MD 21402, USA. NR 26 TC 8 Z9 8 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0013-7944 J9 ENG FRACT MECH JI Eng. Fract. Mech. PY 1991 VL 39 IS 3 BP 535 EP 551 DI 10.1016/0013-7944(91)90065-9 PG 17 WC Mechanics SC Mechanics GA FU181 UT WOS:A1991FU18100009 ER PT S AU BERZINS, V AF BERZINS, V BE Vanlansweerde, A Fugetta, A TI SOFTWARE MERGE - MODELS AND METHODS FOR COMBINING CHANGES TO PROGRAMS SO ESEC 91 : 3RD EUROPEAN SOFTWARE ENGINEERING CONFERENCE SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Proceedings Paper CT 3RD EUROPEAN SOFTWARE ENGINEERING CONF ( ESEC 91 ) CY OCT 21-24, 1991 CL MILAN, ITALY DE SOFTWARE MERGING; CONFIGURATION MANAGEMENT; MAINTENANCE RP BERZINS, V (reprint author), USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA BERLIN SN 0302-9743 BN 3-540-54742-8 J9 LECT NOTES COMPUT SC PY 1991 VL 550 BP 229 EP 250 PG 22 GA BX63X UT WOS:A1991BX63X00013 ER PT J AU SEYMOUR, GE MAIN, RE RANDEL, JM MORRIS, BA AF SEYMOUR, GE MAIN, RE RANDEL, JM MORRIS, BA TI STUDY FACTORS AND THEIR IMPACT ON MILITARY SCHOOL PERFORMANCE-MEASURES SO ETR&D-EDUCATIONAL TECHNOLOGY RESEARCH AND DEVELOPMENT LA English DT Article ID ATTITUDES; VALIDITY RP SEYMOUR, GE (reprint author), USN,CTR PERSONNEL RES & DEV,DIV INSTRUCT SCI,CODE 151,SAN DIEGO,CA 92152, USA. NR 28 TC 0 Z9 0 U1 0 U2 0 PU ASSOC EDUC COMMUNICATIONS & TECHNOLOGY PI WASHINGTON PA 1025 VERMONT AVE NW, SUITE 820, WASHINGTON, DC 20005 SN 1042-1629 J9 ETR&D-EDUC TECH RES JI ETR&D-Educ. Tech. Res. Dev. PY 1991 VL 39 IS 2 BP 19 EP 28 DI 10.1007/BF02298150 PG 10 WC Education & Educational Research SC Education & Educational Research GA GK050 UT WOS:A1991GK05000002 ER PT J AU TAYLOR, B ELLIS, J AF TAYLOR, B ELLIS, J TI AN EVALUATION OF INSTRUCTIONAL-SYSTEMS DEVELOPMENT IN THE NAVY SO ETR&D-EDUCATIONAL TECHNOLOGY RESEARCH AND DEVELOPMENT LA English DT Article RP TAYLOR, B (reprint author), USN,CTR PERSONNEL RES & DEV,SAN DIEGO,CA 92132, USA. NR 27 TC 5 Z9 5 U1 0 U2 0 PU ASSOC EDUC COMMUNICATIONS & TECHNOLOGY PI WASHINGTON PA 1025 VERMONT AVE NW, SUITE 820, WASHINGTON, DC 20005 SN 1042-1629 J9 ETR&D-EDUC TECH RES JI ETR&D-Educ. Tech. Res. Dev. PY 1991 VL 39 IS 1 BP 93 EP 103 DI 10.1007/BF02298110 PG 11 WC Education & Educational Research SC Education & Educational Research GA GK048 UT WOS:A1991GK04800008 ER PT J AU GUTMARK, E PARR, TP HANSONPARR, DM SCHADOW, KC AF GUTMARK, E PARR, TP HANSONPARR, DM SCHADOW, KC TI SIMULTANEOUS OH AND SCHLIEREN VISUALIZATION OF PREMIXED FLAMES AT THE LEAN BLOW-OUT LIMIT SO EXPERIMENTS IN FLUIDS LA English DT Article ID JET DIFFUSION FLAMES; LAYER AB The structure of an air-propane premixed flame was studied experimentally at the lean flammability limit, using Schlieren photography synchronized with OH-imaging done with the Planar Laser Induced Fluorescence (PLIF) technique. The flame was studied in a wide range of fuel equivalence ratios. Various steps in the process of the flame destabilization were investigated, including partial lift-off, stable lift-off, and final blow-out conditions. The flame structure was visualized for each stage showing the transition from a flame held at the nozzle to a flame held by the flow structures. In order to study the latter conditions in more detail the flame was acoustically excited at the preferred mode frequency generating large, stable, coherent structures in the core region. The modified flame structure was visualized to understand the interaction between the flame and vortical flow dynamics. It is shown that for the flow conditions when the flame cannot be stabilized at the nozzle, a new anchoring point is reached at the location of the initial vortex roll-up in the jet shear layer. At this point the flow reversal and transition to turbulence produce stagnation points with relatively low local velocities and velocity gradients where the flame can be stabilized. When the flame jet is being forced at the jet most unstable frequency, large coherent structures are formed and the flame is stabilized intermittently on these vortices. RP GUTMARK, E (reprint author), USN,CTR WEAP,RES DEPT,CHINA LAKE,CA 93555, USA. OI Gutmark, Ephraim/0000-0001-7816-4257 NR 15 TC 8 Z9 8 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0723-4864 J9 EXP FLUIDS JI Exp. Fluids PY 1991 VL 12 IS 1-2 BP 10 EP 16 PG 7 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA GV686 UT WOS:A1991GV68600002 ER PT J AU HORNE, MP HANDLER, RA AF HORNE, MP HANDLER, RA TI NOTE ON THE CANCELLATION OF CONTAMINATING NOISE IN THE MEASUREMENT OF TURBULENT WALL PRESSURE-FLUCTUATIONS SO EXPERIMENTS IN FLUIDS LA English DT Note AB A method is presented for the cancellation of wide band contaminating noise occurring within internal flow configurations such as rectangular channels and pipes. Facility generated noise within these flow systems contaminates the turbulent wall pressure signature at low frequencies thus preventing the possible extraction of useful information. The proposed methodology utilizes the signals from two flush mounted wall pressure transducers. A first estimate for the one-point spectral density is obtained using a least mean square algorithm. A secondary correction to this estimate is obtained by taking advantage of the planar homogeneity of the turbulence. The application of the technique is demonstrated in a fully developed turbulent channel flow for which a more than 40 dB cancellation is obtained at low frequencies. In this low frequency range, the power spectral density is shown to have an approximate quadratic dependence, substantiating past theoretical predictions reported in the literature. RP HORNE, MP (reprint author), USN,RES LAB,COMPUTAT PHYS & FLUID DYNAM LAB,WASHINGTON,DC 20375, USA. NR 8 TC 5 Z9 5 U1 1 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0723-4864 J9 EXP FLUIDS JI Exp. Fluids PY 1991 VL 12 IS 1-2 BP 136 EP 139 PG 4 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA GV686 UT WOS:A1991GV68600019 ER PT J AU SARPKAYA, T SUTHON, P AF SARPKAYA, T SUTHON, P TI INTERACTION OF A VORTEX COUPLE WITH A FREE-SURFACE SO EXPERIMENTS IN FLUIDS LA English DT Article ID VORTICES; FLOWS AB The characteristics of three-dimensional flow structures (scars and striations) resulting from the interaction between a heterostrophic vortex pair in vertical ascent and a clean free surface are described. The flow features at the scar-striation interface (a constellation of whirls or coherent vortical structures) are investigated through the use of flow visualization, a motion analysis system, and the vortex-element method. The results suggest that the striations are a consequence of the short wavelength instability of the vortex pair and the helical instability of the tightly spiralled regions of vorticity. The whirls results from the interaction of striations with the surface vorticity. The whirl-merging is responsible for the reverse energy cascade leading to the formation and longevity of larger vortical structures amidst a rapidly decaying turbulent field. RP SARPKAYA, T (reprint author), NAVAL POST GRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93943, USA. NR 28 TC 40 Z9 41 U1 1 U2 3 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0723-4864 J9 EXP FLUIDS JI Exp. Fluids PY 1991 VL 11 IS 4 BP 205 EP 217 PG 13 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA FX279 UT WOS:A1991FX27900001 ER PT J AU HARRISON, PR RATCLIFFE, PA AF HARRISON, PR RATCLIFFE, PA TI TOWARDS STANDARDS FOR THE VALIDATION OF EXPERT SYSTEMS SO EXPERT SYSTEMS WITH APPLICATIONS LA English DT Article ID KNOWLEDGE BASE REFINEMENT; CLASSIFICATION; VERIFICATION; MODELS AB The paper provides a basis for the standardization of the validation of knowledge-based systems. The place of validation within the development process is discussed and a model is proposed. Knowledge-based system validation problems are decomposed using sequences of independent and dependent generic tasks. A model for validation of KBS causal processes as well as performance outcomes is presented. Practical applications to real systems are described. RP HARRISON, PR (reprint author), USN ACAD,DEPT COMP SCI,ANNAPOLIS,MD 21402, USA. NR 52 TC 3 Z9 3 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0957-4174 J9 EXPERT SYST APPL JI Expert Syst. Appl. PY 1991 VL 2 IS 4 BP 251 EP 258 DI 10.1016/0957-4174(91)90033-B PG 8 WC Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic; Operations Research & Management Science SC Computer Science; Engineering; Operations Research & Management Science GA FK868 UT WOS:A1991FK86800004 ER PT J AU TOULOUSE, J BELL, MI NELSON, KA DALAL, N AF TOULOUSE, J BELL, MI NELSON, KA DALAL, N TI FUNDAMENTAL EXPERIMENTS AND NEW HORIZONS IN FERROELECTRICITY SO FERROELECTRICS LA English DT Article; Proceedings Paper CT 1991 WILLIAMSBURG WORKSHOP ON FUNDAMENTAL EXPERIMENTS IN FERROELECTRICS CY FEB 03-05, 1991 CL WILLIAMSBURG, VA SP USN, OFF NAVAL RES, LEHIGH UNIV, GORDON & BREACH SCI PUBL DE FERROELECTRICITY; LONG RANGE ORDER; LOCAL ORDER C1 USN,RES LAB,DIV CONDENSED MATTER & RADIAT SCI,WASHINGTON,DC 20375. W VIRGINIA UNIV,DEPT CHEM,MORGANTOWN,WV 26506. MIT,DEPT CHEM,CAMBRIDGE,MA 02139. RP TOULOUSE, J (reprint author), LEHIGH UNIV,DEPT PHYS,BETHLEHEM,PA 18015, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0015-0193 J9 FERROELECTRICS PY 1991 VL 120 IS 1-2 BP 1 EP 5 PG 5 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA GJ331 UT WOS:A1991GJ33100001 ER PT J AU BOYER, LL AF BOYER, LL TI APPLICATION OF 1ST PRINCIPLES METHODS IN EXPLORING FOR NEW MATERIALS SO FERROELECTRICS LA English DT Article; Proceedings Paper CT 1991 WILLIAMSBURG WORKSHOP ON FUNDAMENTAL EXPERIMENTS IN FERROELECTRICS CY FEB 03-05, 1991 CL WILLIAMSBURG, VA SP USN, OFF NAVAL RES, LEHIGH UNIV, GORDON & BREACH SCI PUBL DE 1ST PRINCIPLES CALCULATIONS; ANHARMONICITY; MOLECULAR DYNAMICS ID FERROELECTRICITY; ABINITIO; DYNAMICS; SYSTEMS; MODEL RP BOYER, LL (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. NR 13 TC 0 Z9 0 U1 0 U2 0 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0015-0193 J9 FERROELECTRICS PY 1991 VL 120 IS 1-2 BP 7 EP 10 DI 10.1080/00150199108216794 PG 4 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA GJ331 UT WOS:A1991GJ33100002 ER PT J AU BELL, MI KIM, KH ELAM, WT AF BELL, MI KIM, KH ELAM, WT TI DIRECT OBSERVATION OF DISORDER AND CORRELATIONS IN PEROVSKITE-STRUCTURE FERROELECTRICS SO FERROELECTRICS LA English DT Article; Proceedings Paper CT 1991 WILLIAMSBURG WORKSHOP ON FUNDAMENTAL EXPERIMENTS IN FERROELECTRICS CY FEB 03-05, 1991 CL WILLIAMSBURG, VA SP USN, OFF NAVAL RES, LEHIGH UNIV, GORDON & BREACH SCI PUBL DE EXAFS; XANES; PEROVSKITE-FERROELECTRICS ORDER-DISORDER; OFF-CENTER ION ID ABSORPTION RP BELL, MI (reprint author), USN,RES LAB,DYNAM SOLIDS BRANCH,WASHINGTON,DC 20375, USA. NR 10 TC 19 Z9 19 U1 0 U2 0 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0015-0193 J9 FERROELECTRICS PY 1991 VL 120 IS 1-2 BP 103 EP 105 PG 3 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA GJ331 UT WOS:A1991GJ33100013 ER PT J AU MO, Z FLOCKEN, JW MEI, WN GUENTHER, RA HARDY, JR BOYER, LL AF MO, Z FLOCKEN, JW MEI, WN GUENTHER, RA HARDY, JR BOYER, LL TI THE EFFECT OF K-DEFECT CLUSTERS ON THE FERROELECTRIC PHASE-TRANSITIONS IN NACAF3 SO FERROELECTRICS LA English DT Article DE FERROELECTRICS; PEROVSKITES; MOLECULAR DYNAMICS; DEFECTS ID PEROVSKITES C1 UNIV NEBRASKA,LINCOLN,NE 68588. NAVAL RES LAB,WASHINGTON,DC 20357. RP MO, Z (reprint author), UNIV NEBRASKA,OMAHA,NE 68182, USA. NR 6 TC 1 Z9 1 U1 0 U2 1 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0015-0193 J9 FERROELECTRICS PY 1991 VL 120 IS 3-4 BP 143 EP 155 PG 13 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA GR710 UT WOS:A1991GR71000001 ER PT J AU BOYER, LL COHEN, RE EDWARDSON, PJ KRAKAUER, H AF BOYER, LL COHEN, RE EDWARDSON, PJ KRAKAUER, H TI 1ST PRINCIPLES CALCULATIONS FOR POLARIZED CRYSTALS SO FERROELECTRICS LA English DT Article ID ALKALINE-EARTH HALIDES; OF-STATE CALCULATIONS; FERROELECTRICITY; SUPERIONICITY; DYNAMICS; FORCES; ORIGIN C1 COLL WILLIAM & MARY,WILLIAMSBURG,VA 23185. RP BOYER, LL (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Cohen, Ronald/B-3784-2010 OI Cohen, Ronald/0000-0001-5871-2359 NR 20 TC 0 Z9 0 U1 0 U2 1 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0015-0193 J9 FERROELECTRICS PY 1991 VL 117 IS 1-4 BP 233 EP 243 DI 10.1080/00150199108222419 PG 11 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA GE803 UT WOS:A1991GE80300024 ER PT J AU GRABOWSKI, KS HORWITZ, JS CHRISEY, DB AF GRABOWSKI, KS HORWITZ, JS CHRISEY, DB TI PULSED LASER DEPOSITION OF ORIENTED PBZR.54TI.46O3 SO FERROELECTRICS LA English DT Article; Proceedings Paper CT 2ND SYMP ON INTEGRATED FERROELECTRICS CY MAR, 1990 CL US NAVAL POSTGRAD SCH, MONTEREY, CA HO US NAVAL POSTGRAD SCH ID THIN-FILMS RP GRABOWSKI, KS (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 25 TC 50 Z9 51 U1 0 U2 4 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0015-0193 J9 FERROELECTRICS PY 1991 VL 116 IS 1-2 BP 19 EP 33 PG 15 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA FN647 UT WOS:A1991FN64700002 ER PT J AU SCHWEE, LJ AF SCHWEE, LJ TI THE HIGH ROAD TOWARD AN EXCELLENT NONVOLATILE MEMORY SO FERROELECTRICS LA English DT Article; Proceedings Paper CT 2ND SYMP ON INTEGRATED FERROELECTRICS CY MAR, 1990 CL US NAVAL POSTGRAD SCH, MONTEREY, CA HO US NAVAL POSTGRAD SCH RP SCHWEE, LJ (reprint author), USN,CTR SURFACE WARFACE,SILVER SPRING,MD 20903, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0015-0193 J9 FERROELECTRICS PY 1991 VL 116 IS 1-2 BP 157 EP 161 DI 10.1080/00150199108007939 PG 5 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA FN647 UT WOS:A1991FN64700014 ER PT J AU LITTLE, R PANDE, S ROMANS, J MATUSZKO, JS AF LITTLE, R PANDE, S ROMANS, J MATUSZKO, JS TI FLAMMABILITY AND STORAGE STUDIES OF SELECTED FIRE-RESISTANT FLUIDS SO FIRE SAFETY JOURNAL LA English DT Article AB Using the Naval Research Laboratory's mist flammability apparatus, several commercial samples of invert water-in-oil emulsions, designed for possible application as fire-resistant hydraulic fluids or lubricants, were screened for fire resistancy. Their stabilities under storage conditions for approximately a 2-year period were also assessed. For comparison purposes, two other commercial fire-resistant fluids were also screened, viz. a water-glycol solution and a phosphate ester. The Navy's current petroleum type hydraulic fluid, 2190-TEP, was employed as the reference fluid. In addition to fire resistancy tests, the drop size distributions of water microdroplets in the separated emulsion layers were also determined. RP LITTLE, R (reprint author), USN,RES LAB,NAVY TECHNOL CTR SAFETY & SURVIVABIL,DIV CHEM,WASHINGTON,DC 20375, USA. NR 0 TC 3 Z9 3 U1 0 U2 2 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0379-7112 J9 FIRE SAFETY J JI Fire Saf. J. PY 1991 VL 17 IS 1 BP 57 EP 76 DI 10.1016/0379-7112(91)90013-O PG 20 WC Engineering, Civil; Materials Science, Multidisciplinary SC Engineering; Materials Science GA FG686 UT WOS:A1991FG68600005 ER PT S AU PARENT, DC AF PARENT, DC BE Jennings, KR TI WORKSHOP - THE ROLE OF ENERGY IN ION-MOLECULE PROCESSES SO FUNDAMENTALS OF GAS PHASE ION CHEMISTRY SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO ADVANCED STUDY INST ON FUNDAMENTALS OF GAS PHASE ION CHEMISTRY CY JUN 25-JUL 06, 1990 CL MONT ST ODILE, FRANCE SP NATO C1 USN, RES LAB, DIV CHEM, WASHINGTON, DC 20375 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-1423-9 J9 NATO ADV SCI I C-MAT PY 1991 VL 347 BP 197 EP 207 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA BV93K UT WOS:A1991BV93K00012 ER PT J AU VOGT, PR AF VOGT, PR TI BERMUDA AND APPALACHIAN-LABRADOR RISES - COMMON NON-HOTSPOT PROCESSES SO GEOLOGY LA English DT Article ID HEAT-FLOW; ATLANTIC-OCEAN; MANTLE; SEAMOUNTS; MODELS; PLAIN; AGE AB Other than the Corner Rise-New England seamounts and associated White Mountains, most postbreakup intraplate igneous activity and topographic uplift in the western North Atlantic and eastern North America do not readily conform to simple hotspot models. For example, the Bermuda Rise trends normal to its predicted hotspot trace. On continental crust, Cretaceous-Eocene igneous activity is scattered along a northeast-trending belt approximately 500-1000 km west of and paralleling the continent-ocean boundary. Corresponding activity in the western Atlantic generated seamounts preferentially clustered in a belt approximately 1000 km east of the boundary. The Eocene volcanism on Bermuda is paired with coeval magmatism of the Shenandoah igneous province, and both magmatic belts are associated with northeast-trending topographic bulges-the Appalachian-Labrador Rise to the west and the Bermuda Rise (Eocene?) to the east. The above observations suggest the existence of paired asthenosphere upwelling, paralleling and controlled by the deep thermal contrast across the northeast-trending continental margin. Such convection geometry, apparently fixed to the North American plate rather than to hotspots, is consistent with recent convection models by B. Hager. The additional importance of plate-kinematic reorganizations (causing midplate stress enhancement) is suggested by episodic igneous activity ca. 90-100 Ma and 40-45 Ma. RP VOGT, PR (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 22 TC 42 Z9 43 U1 0 U2 3 PU GEOLOGICAL SOC AMERICA PI BOULDER PA PO BOX 9140 3300 PENROSE PLACE, BOULDER, CO 80301 SN 0091-7613 J9 GEOLOGY JI Geology PD JAN PY 1991 VL 19 IS 1 BP 41 EP 44 DI 10.1130/0091-7613(1991)019<0041:BAALRC>2.3.CO;2 PG 4 WC Geology SC Geology GA EQ448 UT WOS:A1991EQ44800010 ER PT J AU PENG, MS WILLIAMS, RT AF PENG, MS WILLIAMS, RT TI STABILITY ANALYSIS OF BAROTROPIC VORTICES SO GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS LA English DT Article DE TROPICAL STORM; TORNADO; BAROTROPIC FLOW; VORTEX BREAKDOWN ID TROPICAL CYCLONE MOTION; VORTEX RP PENG, MS (reprint author), USN,POSTGRAD SCH,DEPT METEOROL,MONTEREY,CA 93940, USA. NR 21 TC 12 Z9 12 U1 2 U2 4 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0309-1929 J9 GEOPHYS ASTRO FLUID JI Geophys. Astrophys. Fluid Dyn. PY 1991 VL 58 IS 1-4 BP 263 EP 283 DI 10.1080/03091929108227342 PG 21 WC Astronomy & Astrophysics; Geochemistry & Geophysics; Mechanics SC Astronomy & Astrophysics; Geochemistry & Geophysics; Mechanics GA HX343 UT WOS:A1991HX34300016 ER PT J AU BROOK, I AF BROOK, I TI THE ROLE OF BETA-LACTAMASE-PRODUCING BACTERIA IN OBSTETRICAL AND GYNECOLOGICAL INFECTIONS SO GYNECOLOGIC AND OBSTETRIC INVESTIGATION LA English DT Article DE BETA-LACTAMASE, BACTEROIDES SPP; NEISSERIA-GONORRHEA; PELVIC INFLAMMATORY DISEASE ID PELVIC INFLAMMATORY DISEASE; BACTEROIDES-FRAGILIS; INVIVO PROTECTION; HEMOLYTIC STREPTOCOCCI; ANTIBACTERIAL ACTIVITY; ANAEROBIC-BACTERIA; ESCHERICHIA-COLI; INVITRO ACTIVITY; PENICILLIN-G; AMPICILLIN AB Pelvic inflammatory disease (PID) is a polymicrobial infection that evolves multiple aerobic and anaerobic bacteria. Several of the bacterial pathogens that participate in PID can produce the enzyme beta lactamase. These include Bacteroides species (including Bacteroides bivius, Bacteroides disiens, and Bacteroides fragilis group), Neisseria gonorrheae, Enterobacteriaceae and Staphylococcus aureus. A recent increase in numbers of beta-lactamase-producing strains of these organisms in PID has been associated with increased failure rates of penicillins in eradication of this infection. These organisms cannot only survive penicillin therapy but also protect penicillin-susceptible pathogens from the drug. These direct and indirect virulence characteristics of beta-lactamase-producing bacteria require the administration of appropriate antimicrobial therapy directed against all of these pathogens in the therapy of PID. C1 USN,MED CTR,BETHESDA,MD 20814. NR 50 TC 1 Z9 1 U1 1 U2 1 PU KARGER PI BASEL PA ALLSCHWILERSTRASSE 10, CH-4009 BASEL, SWITZERLAND SN 0378-7346 J9 GYNECOL OBSTET INVES JI Gynecol.Obstet.Invest. PY 1991 VL 32 IS 1 BP 44 EP 50 PG 7 WC Obstetrics & Gynecology SC Obstetrics & Gynecology GA GM365 UT WOS:A1991GM36500011 PM 1765319 ER PT J AU KUTNER, ML VERTER, F RICKARD, LJ AF KUTNER, ML VERTER, F RICKARD, LJ TI CO(J=2-]1) STUDY OF MOLECULAR CLOUDS IN THE SW ARM OF M31 SO IAU SYMPOSIA LA English DT Article AB We present a map of a 3' x 3' section of the southwest arm of M31 in the CO(J = 2 --> 1) transition. We have detected emission in 25 positions out of 31 observed in a field centered at (-42.5', + 7.5) (major axis, minor axis). The map is sampled at intervals of one beamwidth, with an angular resolution of 30" or 100 x 460 pc. C1 NASA, GODDARD SPACE FLIGHT CTR, ASTRON & SOLAR PHYS LAB, GREENBELT, MD 20771 USA. USN, RES LAB, WASHINGTON, DC 20350 USA. RP RENSSELAER POLYTECH INST, DEPT PHYS, TROY, NY 12180 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0074-1809 J9 IAU SYMP PY 1991 IS 146 BP 29 EP 31 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HK281 UT WOS:A1991HK28100009 ER PT J AU SAHAI, R SUNDIN, M CLAUSSEN, MJ RICKARD, LJ AF SAHAI, R SUNDIN, M CLAUSSEN, MJ RICKARD, LJ TI A SURVEY OF CO EMISSION FROM SOUTHERN SEYFERT-GALAXIES SO IAU SYMPOSIA LA English DT Article C1 USN, RES LAB, WASHINGTON, DC 20375 USA. RP CHALMERS UNIV TECHNOL, DEPT ASTRON ASTROPHYS, S-41296 GOTHENBURG, SWEDEN. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0074-1809 J9 IAU SYMP PY 1991 IS 146 BP 327 EP 327 PG 1 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA HK281 UT WOS:A1991HK28100103 ER PT J AU WILBUR, JE BONO, J AF WILBUR, JE BONO, J TI WIGNER CYCLE SPECTRUM ANALYSIS OF SPREAD SPECTRUM AND DIVERSITY TRANSMISSIONS SO IEEE JOURNAL OF OCEANIC ENGINEERING LA English DT Article DE SPREAD SPECTRUM; WIGNER DISTRIBUTION; CYCLE SPECTRUM; REVERBERATION ID FREQUENCY SIGNAL ANALYSIS; TOOL AB A high-resolution t - omega estimator, termed the Wigner Distribution (WD), is shown to form a sound basis for representing nonstationary acoustic returns. Signal returns are modeled as the output of a time-variant random filter where the WD of the nonstationary signal return defines a random process whose expectation reduces to the instantaneous power spectral density defined for dispersive communication channels. From the WD, a set of relations describing time-variant channel effects on spread spectrum and diversity transmissions are developed. These relations are shown to be useful in comparing spreading techniques under differing channel conditions and for estimating channel-imposed bounds on the spreading parameters required for effective transmission. A mapping from the Wigner distribution to the cycle spectrum is shown to produce cyclic correlations characteristic of the modulation rate. The WD-based formalism is applied to an example of spread spectrum transmission through a reverberation-limited channel. C1 USN,CTR COASTAL SYST,ELECTROMAGNET BRANCH,PANAMA CITY,FL 32407. RP WILBUR, JE (reprint author), USN,CTR COASTAL SYST,SIGNAL & IMAGE PROC BRANCH,PANAMA CITY,FL 32407, USA. NR 15 TC 4 Z9 4 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 0364-9059 J9 IEEE J OCEANIC ENG JI IEEE J. Ocean. Eng. PD JAN PY 1991 VL 16 IS 1 BP 98 EP 106 DI 10.1109/48.64889 PG 9 WC Engineering, Civil; Engineering, Ocean; Engineering, Electrical & Electronic; Oceanography SC Engineering; Oceanography GA ET830 UT WOS:A1991ET83000011 ER PT J AU DECARPIGNY, JN HAMONIC, B WILSON, OB AF DECARPIGNY, JN HAMONIC, B WILSON, OB TI THE DESIGN OF LOW-FREQUENCY UNDERWATER ACOUSTIC PROJECTORS - PRESENT STATUS AND FUTURE-TRENDS SO IEEE JOURNAL OF OCEANIC ENGINEERING LA English DT Review DE LOW-FREQUENCY PROJECTORS; UNDERWATER ACOUSTICS; SONAR; TRANSDUCER MODELING ID TRANSDUCER; RADIATION; ELEMENTS AB This paper first presents the difficulties that dominate low-frequency projector design problems in sonar and oceanographic applications. These are related to the size of the projector, the low radiation resistance, the acoustic interaction effects in arrays, as well as the requirements due to deep submergence. It then describes and compares present low-frequency projectors and analyzes future trends associated with transducer shapes and dimensions or with the type of active materials used for the driving part. Finally, it discusses the different modeling approaches and provides in particular an insight into the respective advantages and disadvantages of classical equivalent circuit models and numerical models - mainly those using the finite-element method. Several modeling examples are briefly introduced. C1 USN,POSTGRAD SCH,DEPT PHYS,MONTEREY,CA 93943. RP DECARPIGNY, JN (reprint author), INST SUPER ELECTR N,CNRS,ACOUST LAB,41 BLVD VAUBAN,F-59046 LILLE,FRANCE. NR 110 TC 37 Z9 39 U1 1 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0364-9059 J9 IEEE J OCEANIC ENG JI IEEE J. Ocean. Eng. PD JAN PY 1991 VL 16 IS 1 BP 107 EP 122 DI 10.1109/48.64890 PG 16 WC Engineering, Civil; Engineering, Ocean; Engineering, Electrical & Electronic; Oceanography SC Engineering; Oceanography GA ET830 UT WOS:A1991ET83000012 ER PT J AU BULMER, CH BURNS, WK PICKETT, CW AF BULMER, CH BURNS, WK PICKETT, CW TI LINEAR 0-20 GHZ MODULATION WITH A 1X2 DIRECTIONAL COUPLER SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article AB The design and performance of a traveling wave 1 x 2 directional coupler modulator are described. 0-20 GHz response (-4 dB(e)) was achieved for Ti:LiNbO3 devices at the 1.3-mu-m wavelength. From experimental determinations of coupling coefficient and interarm intrinsic phase-mismatch for several modulators, linear dynamic ranges of, on average, 78 dB and voltage sensitivities of down to 9-mu-V are determined (for 1 mW detector power, 3 kHz bandwidth, 50-OMEGA detector load). The dependence of sensitivity on coupling coefficient is described and the effect of buffer layer thickness on optical bandwidth and sensitivity is demonstrated. C1 SACHS FREEMAN ASSOCIATES INC,LANDOVER,MD 20785. RP BULMER, CH (reprint author), USN,RES LAB,CODE 6571,WASHINGTON,DC 20375, USA. NR 7 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 1041-1135 J9 IEEE PHOTONIC TECH L JI IEEE Photonics Technol. Lett. PD JAN PY 1991 VL 3 IS 1 BP 28 EP 30 DI 10.1109/68.68038 PG 3 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA EZ740 UT WOS:A1991EZ74000011 ER PT J AU DEUS, AL SUNAK, HRD AF DEUS, AL SUNAK, HRD TI DESIGN CONSIDERATIONS FOR MINIMIZING MACROBENDING LOSS IN ERBIUM-DOPED FIBER AMPLIFIERS SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article AB We have considered step-index fiber designs which minimize macrobending loss in erbium-doped fiber amplifiers pumped at 980 and 1490 nm. This is important so that compact packaging of these amplifiers is possible for field use as power amplifiers, optical repeaters, and preamplifiers. We have considered only small shifts in the peak value of the mode field of the fiber due to bending, such that the gain of the amplifier is essentially unaffected. C1 UNIV RHODE ISL,DEPT ELECT ENGN,FIBER OPT COMMUN,KINGSTON,RI 02881. RP DEUS, AL (reprint author), USN,CTR UNDERWATER SYST,NEW LONDON,CT 06320, USA. NR 12 TC 1 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 1041-1135 J9 IEEE PHOTONIC TECH L JI IEEE Photonics Technol. Lett. PD JAN PY 1991 VL 3 IS 1 BP 50 EP 52 DI 10.1109/68.68045 PG 3 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA EZ740 UT WOS:A1991EZ74000019 ER PT J AU ABED, EH GOLDBERG, AJ GOVER, RE AF ABED, EH GOLDBERG, AJ GOVER, RE TI NONLINEAR MODELING OF GATED RANGE TRACKER DYNAMICS WITH APPLICATION TO RADAR RANGE RESOLUTION SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS LA English DT Article AB Nonlinear dynamic models for gated radar range trackers are developed and applied to the range resolution problem. Two common types of tracking loop dynamics, as well as the automatic gain control (AGC), are accounted for in the models. The null detector is formulated in a general way that encompasses many important error detector laws, including centroid and leading-edge. Both discrete-time and continuous-time dynamic models are presented for each class of tracking loop. The discrete-time models are derived using an analytical description of the pulse-to-pulse dynamics of the tracker. The continuous-time models are approximations of their discrete-time counterparts for sufficiently small values of the pulse repetition interval. Each of the models is analyzed for a deterministic target return condition. General criteria for asymptotic stability of equilibrium points of the models are obtained. The most striking of the stability criteria is a sign requirement on the slope of a "range error curve." These criteria are used in a two-target example to draw conclusions on a tracker's ability to resolve closely spaced targets as a function of target separation. These conclusions are compared with previously reported conclusions on resolvability obtained using Woodward's "ambiguity function" approach. C1 USN,RES LAB,DIV TACT ELECTR WARFARE,ADV TECHNIQUES BRANCH,WASHINGTON,DC 20375. RP ABED, EH (reprint author), UNIV MARYLAND,DEPT ELECT ENGN,SYST RES CTR,COLLEGE PK,MD 20742, USA. NR 16 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 0018-9251 J9 IEEE T AERO ELEC SYS JI IEEE Trans. Aerosp. Electron. Syst. PD JAN PY 1991 VL 27 IS 1 BP 68 EP 82 DI 10.1109/7.68149 PG 15 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA EY693 UT WOS:A1991EY69300008 ER PT J AU GERLACH, K KRETSCHMER, FF AF GERLACH, K KRETSCHMER, FF TI CONVERGENCE PROPERTIES OF GRAM-SCHMIDT AND SMI ADAPTIVE ALGORITHMS .2. SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS LA English DT Article ID LATTICE AB Theorems and relationships associated with the convergence rate of the Gram-Schmidt (GS) and sampled matrix inversion (SMI) algorithms are presented. Two forms of the GS canceler are discussed: concurrent block processing and sliding window processing. It is shown (as it has been stated by other researchers) that the concurrent block processed GS canceler converges rapidly to its optimal signal-to-noise ratio. However, it is also shown that the result is deceptive in that the output residue samples may be highly correlated which would significantly degrade postdetection processing. Furthermore, it is demonstrated that a specific form of a sliding window GS canceler has the same convergence properties as the concurrent block processed GS canceler. RP GERLACH, K (reprint author), USN,RES LAB,DIV RADAR,CODE 5340 IG,WASHINGTON,DC 20375, USA. NR 8 TC 19 Z9 19 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 0018-9251 J9 IEEE T AERO ELEC SYS JI IEEE Trans. Aerosp. Electron. Syst. PD JAN PY 1991 VL 27 IS 1 BP 83 EP 91 DI 10.1109/7.68150 PG 9 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA EY693 UT WOS:A1991EY69300009 ER PT J AU KRETSCHMER, FF GERLACH, K AF KRETSCHMER, FF GERLACH, K TI LOW SIDELOBE RADAR WAVE-FORMS DERIVED FROM ORTHOGONAL MATRICES SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS LA English DT Article ID COMPLEMENTARY-CODES; PULSE-COMPRESSION AB New waveforms are described that have low sidelobes when individual or multiple waveforms are appropriately processed. They are related to orthogonal matrices that may be associated with complementary sequences and also with periodic waveforms having autocorrelation functions with constant zero-amplitude sidelobes. Also described are sets of sequences whose cross-correlation functions sum to zero everywhere. A potential application is the elimination of ambiguous range stationary clutter. RP KRETSCHMER, FF (reprint author), USN,RES LAB,4555 OVERLOOK AVE,SW,WASHINGTON,DC 20375, USA. NR 15 TC 28 Z9 28 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9251 J9 IEEE T AERO ELEC SYS JI IEEE Trans. Aerosp. Electron. Syst. PD JAN PY 1991 VL 27 IS 1 BP 92 EP 102 DI 10.1109/7.68151 PG 11 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA EY693 UT WOS:A1991EY69300010 ER PT J AU CHUBB, SR VALENZUELA, GR GREENBERG, DA AF CHUBB, SR VALENZUELA, GR GREENBERG, DA TI RADAR SURFACE SIGNATURES BASED ON THE 2-DIMENSIONAL TIDAL CIRCULATION OF PHELPS BANK SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING LA English DT Article ID BATHYMETRY; WAVES AB Numerical results for the M2 tidal currents over Phelps Bank, Nantucket Shoals, Massachusetts, with 1/8 x 1/8 min arc resolution are used to predict the radar surface signatures (cross sections-sigma) of Phelps Bank using the Alpers and Hennings [11] first-order relaxation model. The numerical predictions for sigma-incorporate all two-dimensional contributions from the tidal currents and include both the residual and first harmonic term. Not unexpectedly, strong correlation between spatially resolved contour plots of sigma over a wide range of directions and time intervals within the tidal cycle, with variations in the bottom topography of the Phelps Bank, is obtained even when Bragg wave scattering alone is included. Additional contributions to the radar surface signatures should come from other scattering mechanisms (i.e., specular, tilting, wave-breaking, etc.) as well as from hydrodynamic effects such as the shoaling of long ocean waves over the bottom features modulating the energy of the Bragg resonant waves. The predictions for sigma are contrasted with previous measurements in the Phelps Bank by the Naval Research Laboratory (NRL) and a discussion is given of the importance of including the off-diagonal elements from the current stress tensor in the evaluation of sigma. C1 FISHERIES & OCEANS CANADA, BEDFORD INST OCEANOG, DARTMOUTH B2Y 4A2, NS, CANADA. RP USN, RES LAB, 4555 OVERLOOK AVE SE, WASHINGTON, DC 20375 USA. NR 19 TC 6 Z9 9 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 0196-2892 EI 1558-0644 J9 IEEE T GEOSCI REMOTE JI IEEE Trans. Geosci. Remote Sensing PD JAN PY 1991 VL 29 IS 1 BP 129 EP 134 DI 10.1109/36.103302 PG 6 WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote Sensing; Imaging Science & Photographic Technology SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology GA ER649 UT WOS:A1991ER64900017 ER PT J AU DAVIDSON, KL SKUPNIEWICZ, CE AF DAVIDSON, KL SKUPNIEWICZ, CE TI WIND-STRESS SURFACE TRUTH MEASUREMENTS FOR NORCSEX SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING LA English DT Note ID HEAT-FLUX; SEA AB Wind-stress measurements are important to future in situ experiments related to space remote-sensing systems. Surface wind-stress measurements, based on the inertial dissipation method, were made from a small, easily deployable buoy during NORCSEX. Since NORCSEX (Norwegian Continental Shelf Experiment) was a prelaunch ERS-1 experiment, techniques and performance assessments from this deployment will be applied to postlaunch experiments with higher data density. The buoy platform provides opportunity for spatial measurements of longer duration than ships. Comparisons of buoy and ship-neutral drag coefficient results for a three-day period indicate that the buoy is a better platform for remote-sensing surface truth. RP DAVIDSON, KL (reprint author), USN,NAVAL POSTGRAD SCH,ENVIRONM PHYS GRP,MONTEREY,CA 93943, USA. 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 0196-2892 J9 IEEE T GEOSCI REMOTE JI IEEE Trans. Geosci. Remote Sensing PD JAN PY 1991 VL 29 IS 1 BP 186 EP 189 DI 10.1109/36.103314 PG 4 WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote Sensing; Imaging Science & Photographic Technology SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology GA ER649 UT WOS:A1991ER64900029 ER PT J AU JAMISON, KA STEARNS, RE KLUG, RB FORD, RD AF JAMISON, KA STEARNS, RE KLUG, RB FORD, RD TI HIGH-ENERGY CABLE DEVELOPMENT FOR PULSED POWER APPLICATIONS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 5TH SYMP ON ELECTROMAGNETIC LAUNCHER TECHNOLOGY CY APR 03-05, 1990 CL SANDESTIN, FL AB Commercially available coaxial cables have been used successfully to deliver current from a power supply to small electromagnetic launchers. As launchers become more energetic, and as repetitive fire becomes more important, the shear number of parallel cables required, becomes impractical. This paper presents a new cable design, outlines the development of terminal connectors for the cable, and describes the characterization tests of a first run sample of high power cable. This work was performed for the Air Force Armament Laboratory, Electromagnetic Launcher Technology Branch (AFATL/SAH) and was funded by SDIO. All experimental work was performed in AFATL's Site A-15 Basic Research Facility. C1 AIR FORCE ARMAMENT LAB,SAH,EGLIN AFB,FL 32542. US NAVAL RES LAB,WASHINGTON,DC. RP JAMISON, KA (reprint author), SCI APPLICAT INT CORP,1247-B N EGLIN PKWY,SHALIMAR,FL 32579, USA. NR 0 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 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1991 VL 27 IS 1 BP 374 EP 379 DI 10.1109/20.101060 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA ER831 UT WOS:A1991ER83100077 ER PT J AU KLUG, RB FORD, RD JENKINS, DJ LUPTON, WH AF KLUG, RB FORD, RD JENKINS, DJ LUPTON, WH TI 10 MEGACOULOMB SWITCHING OPERATION FOR THE AIR-FORCE BATTERY POWERED INDUCTIVE STORAGE LAUNCHER RESEARCH FACILITY SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 5TH SYMP ON ELECTROMAGNETIC LAUNCHER TECHNOLOGY CY APR 03-05, 1990 CL SANDESTIN, FL AB Operation of the battery powered inductive energy storage research facility (BPS) at the Air Force Armament Laboratory, presents some unique switching problems. The energy storage system switch must be capable of conducting a peak current in excess of two MA for as long as five seconds. It must then be capable of opening with microsecond precision timing, to synchronize current commutation with the operation of various electro-mechanical as well as electrical load components. A solid conductor, explosive operated switch design has been selected as most suitable for meeting these needs. Switch design incorporates both a normally closed contact for inductor charging and a normally open contact for safety abort as well as for routine energy management after each launch sequence. Both contacts are installed on the BPS switch bus as "stand alone" devices which may be used independantly or sequentially, depending upon experiment requirements. The combination is used as the primary system switch for inductor charging, current commutation to various loads including other switches, and energy management. This paper describes switch operating parameters in more detail, and presents results from preliminary system operation. C1 USN,RES LAB,WASHINGTON,DC 20375. RP KLUG, RB (reprint author), AIR FORCE ARMAMENT LAB,EGLIN AFB,FL 32542, USA. NR 4 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 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD JAN PY 1991 VL 27 IS 1 BP 380 EP 383 DI 10.1109/20.101061 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA ER831 UT WOS:A1991ER83100078 ER PT J AU HOW, H CAROSELLA, C AF HOW, H CAROSELLA, C TI NOVEL FILTER DESIGN INCORPORATING ASYMMETRICAL STRIPLINE Y-JUNCTION CIRCULATORS SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES LA English DT Article AB Theoretical treatments of an asymmetrical stripline Y-junction circulator have been carried out. These include a formulation of the circulation conditions of an asymmetrical circulator as well as its transmission characteristics under wide-frequency-band consideration. We found that filter designs incorporating circulators are very plausible, which give rise to a narrow transmission band around the desired transmission frequency and a wide stopband extending many times the fundamental transmission frequency. In our design higher order mode excitations inherent in other filter designs are attenuated. In addition, owing to the off-resonance operation of the ferrites, our design could be applied under higher power conditions than traditional resonant ferrite filters. C1 USN,RES LAB,OFF NAVAL RES,WASHINGTON,DC 20375. RP HOW, H (reprint author), NORTHEASTERN UNIV,DEPT ELECT & COMP ENGN,BOSTON,MA 02115, USA. NR 11 TC 9 Z9 9 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 0018-9480 J9 IEEE T MICROW THEORY JI IEEE Trans. Microw. Theory Tech. PD JAN PY 1991 VL 39 IS 1 BP 40 EP 46 DI 10.1109/22.64603 PG 7 WC Engineering, Electrical & Electronic SC Engineering GA ET603 UT WOS:A1991ET60300007 ER PT J AU SHOEMAKER, PA AF SHOEMAKER, PA TI A NOTE ON LEAST-SQUARES LEARNING PROCEDURES AND CLASSIFICATION BY NEURAL NETWORK MODELS SO IEEE TRANSACTIONS ON NEURAL NETWORKS LA English DT Letter AB In recent years there has been considerable interest in the capabilities of neural network models applied to tasks such as classification [1]-[4], which typically require some a posteriori judgment of likelihood (for example, of class membership) based upon probabilistic data. This has led to analyses of network learning and function in a statistical context [5]-[8]. We consider neural network models as mathematical classifiers whose inputs comprise random variables generated according to arbitrary stationary class distributions, and address the implication of learning based upon minimization of sum-square classification error over a training set of these observations for which class assignments are absolutely determined. Expectations for network outputs in such case are weighted least-squares approximations to a posteriori probabilities for the classes, which justifies interpretation of network outputs as indicating degree of confidence in class membership. We demonstrate this with a straightforward proof, in which class probability densities are regarded as primitives, and which for simplicity does not rely upon probability theory or statistics. In addition, we cite more detailed results giving conditions for consistency of the estimators (with respect to the weighted least-squares approximations) [9], and discuss some issues relating to the suitability of neural network models and back-propagation training [10] for approximation of conditional probabilities in classification tasks. RP SHOEMAKER, PA (reprint author), USN,CTR OCEAN SYST,DIV SOLID STATE ELECTR,SAN DIEGO,CA 92152, USA. NR 13 TC 12 Z9 12 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 1045-9227 J9 IEEE T NEURAL NETWOR JI IEEE Trans. Neural Netw. PD JAN PY 1991 VL 2 IS 1 BP 158 EP 160 DI 10.1109/72.80304 PG 3 WC Computer Science, Artificial Intelligence; Computer Science, Hardware & Architecture; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA EW286 UT WOS:A1991EW28600018 PM 18276364 ER PT J AU HINTZ, KJ MCVEY, ES AF HINTZ, KJ MCVEY, ES TI MULTIPROCESS CONSTRAINED ESTIMATION SO IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS LA English DT Letter ID MANEUVERING TARGET TRACKING; FILTER AB A method is described that maximizes the information flow through a constrained communications channel when it is desired to estimate the state multiple nonstationary processes. The concept of a constrained channel is introduced as a channel that is not capable of transferring all of the information required. A measure of information is developed based on the estimation entropy utilizing the Kalman filter state estimator. It is shown that this measure of information can be used to determine which process to observe in order to maximize a measure of global information flow. For stationary processes, the sampling sequence can be computed a priori, but nonstationary processes require real-time sequence computation. C1 USN,CTR SURFACE WEAP,DAHLGREN,VA. UNIV VIRGINIA,DEPT ELECT ENGN,CHARLOTTESVILLE,VA 22903. NR 23 TC 37 Z9 38 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 0018-9472 J9 IEEE T SYST MAN CYB JI IEEE Trans. Syst. Man Cybern. PD JAN-FEB PY 1991 VL 21 IS 1 BP 237 EP 244 DI 10.1109/21.101154 PG 8 WC Computer Science, Cybernetics; Engineering, Electrical & Electronic SC Computer Science; Engineering GA EU448 UT WOS:A1991EU44800024 ER PT J AU SMITH, WA AULD, BA AF SMITH, WA AULD, BA TI MODELING 1-3 COMPOSITE PIEZOELECTRICS - THICKNESS-MODE OSCILLATIONS SO IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL LA English DT Article ID ULTRASONIC TRANSDUCER APPLICATIONS AB A simple physical model of 1-3 composite piezoelectrics is advanced for the material properties that are relevant to thickness-mode oscillations. This model is valid when the lateral spatial scale of the composite is sufficiently fine that the composite can be treated as an effective homogeneous medium. Expressions for the composite's material parameters in terms of the volume fraction of piezoelectric ceramic and the properties of the consituent piezoelectric ceramic and passive polymer are derived. A number of examples illustrate the implications of using piezocomposites in medical ultrasonic imaging transducers. While most material properties of the composite roughly interpolate between their values for pure polymer and pure ceramic, the composite's thickness-mode electromechanical coupling can exceed that of the component ceramic. This enhanced electromechanical coupling stems from partially freeeing the lateral clamping of the ceramic in the composite structure. Their higher coupling and lower acoustic impedence commend composites for medical ultrasonic imaging transducers. Our model also reveals that the composite's material properties cannot all be optimized simultaneoulsy; trade-offs must be made. Of most significance is the trade-off between the desired lower acoustic impedance and the undesired smaller electromechanical coupling that occurs as the volume fraction of piezoceramic is reduced. C1 N AMER PHILIPS LIGHTING CORP,PHILIPS LABS,NEW YORK,NY 10510. STANFORD UNIV,EDWARD L GINZTON LAB,STANFORD,CA 94305. RP SMITH, WA (reprint author), OFF NAVAL RES,DIV MAT,CODE 1131,800 N QUINCY ST,ARLINGTON,VA 22217, USA. NR 43 TC 457 Z9 473 U1 3 U2 43 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0885-3010 J9 IEEE T ULTRASON FERR JI IEEE Trans. Ultrason. Ferroelectr. Freq. Control PD JAN PY 1991 VL 38 IS 1 BP 40 EP 47 DI 10.1109/58.67833 PG 8 WC Acoustics; Engineering, Electrical & Electronic SC Acoustics; Engineering GA EP653 UT WOS:A1991EP65300005 PM 18267555 ER PT B AU EISMAN, MP DORWIN, E BARNES, D NELSON, B AF EISMAN, MP DORWIN, E BARNES, D NELSON, B BE HINCHEE, RE OLFENBUTTEL, RF TI INSITU BIOREMEDIATION OF JP-5 JET FUEL SO IN SITU BIORECLAMATION: APPLICATION AND INVESTIGATIONS FOR HYDROCARBON AND CONTAMINATED SITE REMEDIATION LA English DT Proceedings Paper CT INTERNATIONAL SYMP ON IN SITU AND ON-SITE BIORECLAMATION CY MAR, 1991 CL SAN DIEGO, CA SP BATTELLE MEM INST RP EISMAN, MP (reprint author), USN,CIVIL ENGN LAB,CODE L71,PORT HUENEME,CA 93043, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BUTTERWORTH-HEINEMANN PI STONEHAM PA STONEHAM BN 0-7506-9301-0 PY 1991 BP 561 EP 569 PG 9 WC Biotechnology & Applied Microbiology; Chemistry, Organic; Engineering, Civil; Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Biotechnology & Applied Microbiology; Chemistry; Engineering; Environmental Sciences & Ecology; Geology; Water Resources GA BU85H UT WOS:A1991BU85H00042 ER PT J AU ZANG, JX RUSTGI, ML AF ZANG, JX RUSTGI, ML TI ENERGY-LEVELS OF A PARTICLE IN A WELL WITH AN ARBITRARY INTERNAL CONFIGURATION OF SQUARE POTENTIALS SO INFRARED PHYSICS LA English DT Article ID QUANTUM AB Normalized analytical equations for eigenstates of an arbitrary one-dimensional configuration of square potentials in a well have been derived. The general formulation is used to evaluate the energy levels of a particle in a very deep potential well containing seven internal barriers. The results are shown in graphical forms as functions of the height and width of the potential barriers and as functions of the ratio of the effective mass in barrier to the mass in well. The formation of energy bands and surface eigenstates from eigenstates of a deep single well, the coming close of two energy bands and a surface state which are separate ordinarily, and mixing of the wavefunction of a surface state with the bulk energy bands is seen. C1 USN,RES LAB,WASHINGTON,DC 20375. RP ZANG, JX (reprint author), SUNY BUFFALO,DEPT PHYS,BUFFALO,NY 14260, USA. NR 13 TC 3 Z9 3 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0020-0891 J9 INFRARED PHYS PY 1991 VL 31 IS 6 BP 621 EP 629 DI 10.1016/0020-0891(91)90153-7 PG 9 WC Optics; Physics, Applied SC Optics; Physics GA GW026 UT WOS:A1991GW02600013 ER PT J AU JOSHI, Y PAJE, RA AF JOSHI, Y PAJE, RA TI NATURAL-CONVECTION COOLING OF A CERAMIC SUBSTRATE MOUNTED LEADLESS CHIP CARRIER IN DIELECTRIC LIQUIDS SO INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER LA English DT Article AB An experimental investigation of natural convection heat transfer from a commercially available semiconductor device package is presented. The package was centrally mounted on a ceramic substrate. The package substrate assembly formed one surface of a dielectric liquid filled cubical enclosure of side 4.6 cm. The surface facing the package substrate combination was maintained at a uniform temperature and acted as the heat sink while the remaining enclosure walls were insulated. Temperature measurements were made at the chip center, the package lid and several locations on the substrate. Baseline measurements are reported first for air cooling. Results are then presented for three dielectric liquids and three temperatures of the cold wall, both with the substrate oriented horizontally, as well as vertically. With the cold wall maintained at 15-degrees-C it was found that the maximum input power without exceeding a chip temperature of 80-degrees-C was about 1.9 W with FC-75 as the coolant. RP JOSHI, Y (reprint author), USN,POSTGRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93943, USA. NR 0 TC 6 Z9 6 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0735-1933 J9 INT COMMUN HEAT MASS JI Int. Commun. Heat Mass Transf. PD JAN-FEB PY 1991 VL 18 IS 1 BP 39 EP 47 DI 10.1016/0735-1933(91)90006-P PG 9 WC Thermodynamics; Mechanics SC Thermodynamics; Mechanics GA EV347 UT WOS:A1991EV34700005 ER PT J AU THOMAS, JP AF THOMAS, JP TI THE MODELING OF OPEN MASS CONTINUUM MIXTURES SO INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE LA English DT Article AB The main objective of the work reported here was to derive the equations which govern the static and dynamic behavior of an open mass continuum mixture subjected to varying conditions of deformation, mass diffusion, heat transfer, and chemical reaction. The body of the mixture was taken to correspond with the body of one of the constituents. This constituent, referred to as the reference constituent, in essence defines the mixture. A general integral balance equation is postulated, valid over the region in space occupied by the reference constituent, and then used to derive local integral and differential balance laws for mass, linear momentum, moment of momentum, energy, and entropy. Jump conditions for discontinuous field values are also derived. General solutions to the entropy inequality are then used to obtain phenomenological constitutive equations that are consistent with the continuum laws of physics and the Second Law of Thermodynamics. And finally, some of the additional steps required for constitutive modeling are discussed. RP THOMAS, JP (reprint author), USN,RES LAB,MECH MAT BRANCH,CODE 6382,WASHINGTON,DC 20375, USA. NR 38 TC 7 Z9 7 U1 1 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0020-7225 J9 INT J ENG SCI JI Int. J. Eng. Sci. PY 1991 VL 29 IS 11 BP 1451 EP 1469 DI 10.1016/0020-7225(91)90050-D PG 19 WC Engineering, Multidisciplinary SC Engineering GA GJ742 UT WOS:A1991GJ74200012 ER PT J AU QUINT, T AF QUINT, T TI CHARACTERIZATION OF CORES OF ASSIGNMENT GAMES SO INTERNATIONAL JOURNAL OF GAME THEORY LA English DT Article AB We consider the assignment game of Shapley and Shubik (1972). We prove that the class of possible cores of such games (expressed in terms of payoffs for players on one side of the market) is exactly the same as a special class of polytopes, called "45-degrees-lattices". These results parallel similar work done by Conway (in Knuth, 1976) and Blair (1984) for marriage markets. RP QUINT, T (reprint author), USN ACAD,DEPT MATH,ANNAPOLIS,MD 21402, USA. NR 6 TC 7 Z9 8 U1 0 U2 1 PU PHYSICA VERLAG GMBH PI HEIDELBERG PA TIERGARTENSTRASSE 17, W-6900 HEIDELBERG, GERMANY SN 0020-7276 J9 INT J GAME THEORY JI Int. J. Game Theory PY 1991 VL 19 IS 4 BP 413 EP 420 DI 10.1007/BF01766430 PG 8 WC Economics; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods; Statistics & Probability SC Business & Economics; Mathematics; Mathematical Methods In Social Sciences GA FN078 UT WOS:A1991FN07800007 ER PT J AU HARGREAVES, TA FISCHER, RP MCCOWAN, RB FLIFLET, AW AF HARGREAVES, TA FISCHER, RP MCCOWAN, RB FLIFLET, AW TI OHMIC EFFECTS IN QUASI-OPTICAL RESONATORS SO INTERNATIONAL JOURNAL OF INFRARED AND MILLIMETER WAVES LA English DT Article ID GYROTRON; MASER AB Several properties of the Fabry-Perot-type open resonator used in the quasioptical gyrotron (QOG) and the quasioptical induced resonance electron cyclotron (IREC) maser are derived. The electric fields of the normal modes are given for the general case of the resonator axis tilted with respect to the direction perpendicular to the electron beam axis. The ohmic quality factor and the power dissipated in the mirrors are derived, as is the energy stored in the resonator. The time dependence of the mirror heating, relevant for pulsed experiments, is also derived. The formulae are applied to an example of current relevance, the quasioptical IREC maser resonator. RP HARGREAVES, TA (reprint author), USN,RES LAB,DIV PLASMA PHYS,BEAM PHYS BRANCH,WASHINGTON,DC 20375, USA. NR 11 TC 2 Z9 3 U1 0 U2 1 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 JAN PY 1991 VL 12 IS 1 BP 9 EP 21 DI 10.1007/BF01041879 PG 13 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA EU042 UT WOS:A1991EU04200002 ER PT J AU ROSENFELD, P THOMAS, MD EDWARDS, JE THOMAS, PJ THOMAS, ED AF ROSENFELD, P THOMAS, MD EDWARDS, JE THOMAS, PJ THOMAS, ED TI NAVY RESEARCH INTO RACE, ETHNICITY, AND GENDER ISSUES - A HISTORICAL REVIEW SO INTERNATIONAL JOURNAL OF INTERCULTURAL RELATIONS LA English DT Review ID HISPANICS AB During the past 20 years, researchers at the Navy Personnel Research and Development Center (NPRDC) have investigated issues relating to equal opportunity (EO). The present paper provides the first comprehensive review of past NPRDC EO research. Four main efforts are reviewed: EO climate, changing roles for Navy women, assessment of potential bias in Navy discipline, and Hispanic representation in Navy's civilian work force. It is concluded that, in addition to their historical import, these four avenues of research remain concerns for the Navy and American society in the 1990s. RP ROSENFELD, P (reprint author), USN,CTR PERSONNEL RES & DEV,CODE 01E,SAN DIEGO,CA 92152, USA. NR 65 TC 7 Z9 7 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0147-1767 J9 INT J INTERCULT REL JI Int. J. Intercult. Relat. PY 1991 VL 15 IS 4 BP 407 EP 426 DI 10.1016/0147-1767(91)90047-K PG 20 WC Psychology, Social; Social Sciences, Interdisciplinary; Sociology SC Psychology; Social Sciences - Other Topics; Sociology GA GX337 UT WOS:A1991GX33700003 ER PT J AU SURKO, SW AF SURKO, SW TI CRUSHING STRENGTH OF BOX COLUMNS WITH PARTIALLY-DAMAGED PLATING SO INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES LA English DT Article AB Manufacturing processes and in-service life can "partially damage" initially-flat structural plating, Partially-damaged plating can be characterized by holing, tearing and dishing. Despite suffering from these damage modes, a structural element such as a box column is required to continue to support loading. A small program of experimentation was developed to gain qualitative insights into the interaction and cumulative effect of the various damage modes. Seven symmetrical mild steel box column specimens were constructed of four square side plates with length-to-thickness ratios of 88 and two stiffened end plates and then crushed up to 50% of their initial length. Increased holing did not reduce ultimate strength rapidly, and had even less effect on mean crushing strength. Crack growth was not found to be a factor during testing. Dishing on the order of five to 15 plate thicknesses reduced ultimate strength by approximately 15-35%, and strongly influenced failure modes. The ultimate strength of plates with various damage modes has been thoroughly examined elsewhere, and is briefly reviewed here. Simple closed-form solutions for the mean crushing strength of thin-walled, plate-formed structures are adjusted and applied to box columns with partially-damaged plating. The experimental results are compared against these different structural response predictions. RP SURKO, SW (reprint author), USN,PHILADELPHIA NAVAL SHIPYARD,PHILADELPHIA,PA 19112, USA. NR 9 TC 2 Z9 2 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0020-7403 J9 INT J MECH SCI JI Int. J. Mech. Sci. PY 1991 VL 33 IS 12 BP 1017 EP 1028 DI 10.1016/0020-7403(91)90056-9 PG 12 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA GY657 UT WOS:A1991GY65700006 ER PT J AU EFTIS, J NEMES, JA RANDLES, PW AF EFTIS, J NEMES, JA RANDLES, PW TI VISCOPLASTIC ANALYSIS OF PLATE-IMPACT SPALLATION SO INTERNATIONAL JOURNAL OF PLASTICITY LA English DT Article ID DYNAMIC FRACTURE; SHOCK-WAVE; DUCTILE; METALS; SOLIDS AB A model to predict material damage and spall fracture under high strain-rate conditions is applied to plate impact experiments. The model uses the Perzyna viscoplastic constitutive theory, appropriately modified to include a nonlinear isotropic hardening law that allows for saturation of the hardening with increase of strain. The constitutive equation contains a scalar variable for description of the material damage, expressed as the void volume fraction of the polycrystalline solid with microvoids. Incorporation of the damage parameter into the completely phenomenological elasto-viscoplastic constitutive equations permits description of rate-dependent, compressible, inelastic deformation, and ductile fracture. The evolution equation for the parameter describes microvoid nucleation and growth. The model for microvoid growth is based upon a random distribution of microvoids, idealized as spherical holes of arbitrary size. Microvoid coalescence is considered by incorporation of void interaction functions to describe enhanced nucleation and growth rates. A local spall fracture criterion based upon the attainment of a critical microvoid volume is utilized. The constitutive equations are specialized to uniaxial deformation with multiaxial stress, which is appropriate for the planar impact experiments. A finite-difference wave propagation computer code is used to solve the equation of motion. The computed stress wave profiles demonstrate the effect of using a viscoplastic material description. Calculations predicting the rear-surface velocity-time profile and the stress-time profiles of the OFHC copper target are compared with measured profiles. The damage (void volume) distribution across the plate thickness is also calculated and compared with experimental data. C1 USN,RES LAB,WASHINGTON,DC 20375. RP EFTIS, J (reprint author), GEORGE WASHINGTON UNIV,DEPT CIVIL MECH & ENVIRONM ENGN,WASHINGTON,DC 20052, USA. NR 26 TC 26 Z9 27 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0749-6419 J9 INT J PLASTICITY JI Int. J. Plast. PY 1991 VL 7 IS 1-2 BP 15 EP 39 DI 10.1016/0749-6419(91)90003-H PG 25 WC Engineering, Mechanical; Materials Science, Multidisciplinary; Mechanics SC Engineering; Materials Science; Mechanics GA FA625 UT WOS:A1991FA62500002 ER PT J AU EFTIS, J NEMES, JA AF EFTIS, J NEMES, JA TI EVOLUTION EQUATION FOR THE VOID VOLUME GROWTH-RATE IN A VISCOPLASTIC-DAMAGE CONSTITUTIVE MODEL SO INTERNATIONAL JOURNAL OF PLASTICITY LA English DT Article ID PORE-COLLAPSE; DUCTILE; FRACTURE AB A mathematical model for the rate of growth of microvoids under mean tensile stress in dynamic processes is developed, which represents an extension of previous analysis of ductile void growth rates using the hollow sphere model. A viscoplastic material is assumed for which the isotropic hardening saturates as the strain progresses. The microvoid growth model is used as an internal damage variable in Perzyna's elasto-viscoplastic constitutive theory for solids experiencing ductile modes of material damage. Several features of the void growth model are illustrated for a copper material, having been taken from our application of the viscoplastic-damage constitutive theory to model shock-induced high strain-rate deformation and spall fracture in polycrystalline solids. C1 USN,RES LAB,WASHINGTON,DC 20375. RP EFTIS, J (reprint author), GEORGE WASHINGTON UNIV,DEPT CIVIL MECH & ENVIRONM ENGN,WASHINGTON,DC 20052, USA. NR 16 TC 29 Z9 29 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0749-6419 J9 INT J PLASTICITY JI Int. J. Plast. PY 1991 VL 7 IS 4 BP 275 EP 293 DI 10.1016/0749-6419(91)90036-X PG 19 WC Engineering, Mechanical; Materials Science, Multidisciplinary; Mechanics SC Engineering; Materials Science; Mechanics GA GB770 UT WOS:A1991GB77000003 ER PT J AU MOWREY, RC DUNLAP, BI AF MOWREY, RC DUNLAP, BI TI DISSOCIATIVE ADSORPTION AND ASSOCIATIVE DESORPTION OF H-2 ON A FLAT SURFACE SO INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY LA English DT Article ID DEPENDENT SCHRODINGER-EQUATION; DYNAMICS; QUANTUM; CHEMISORPTION; NI(100); MODEL AB A quantum mechanical time-dependent method was used to study the dynamics of dissociative adsorption and associative desorption of H-2 on a flat, static surface. We used a two-dimensional model in which the molecular axis was held parallel to the surface and the diatom internuclear separation and distance above the surface were the dynamic variables. A modified London-Eyring-Polanyi-Sato (LEPS) potential described the molecule-surface interaction. The wave function for the molecule was represented by its values on a spatial grid of points. The wave function was propagated by expanding the time evolution operator in a series of Chebyshev polynomials and using the properties of the Fourier transform to calculate the kinetic energy. The computational requirements of the problem were significantly reduced by using an L-shaped grid which deletes a large number of points where it is known a priori that the wave-function amplitude vanishes. State-to-state transition probabilities were calculated as a function of the initial translational and vibrational energy for potentials with early, late, and intermediate barriers. The location of the barrier has a strong effect on the energy threshold for reaction and on the distribution of energy between vibration and translation in the products. C1 USN, RES LAB, THEORET CHEM SECT, WASHINGTON, DC 20375 USA. NR 16 TC 0 Z9 0 U1 0 U2 0 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0020-7608 EI 1097-461X J9 INT J QUANTUM CHEM JI Int. J. Quantum Chem. PY 1991 VL 40 SU 25 BP 641 EP 657 DI 10.1002/qua.560400857 PG 17 WC Chemistry, Physical; Mathematics, Interdisciplinary Applications; Physics, Atomic, Molecular & Chemical SC Chemistry; Mathematics; Physics GA GT391 UT WOS:A1991GT39100054 ER PT J AU FAZIO, CJ AF FAZIO, CJ TI ANALYSIS OF VALANIS CRITICISM - CLOSURE SO INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES LA English DT Letter ID ENDOCHRONIC THEORY; PLASTICITY; LIMIT RP FAZIO, CJ (reprint author), USN,RES LAB,DIV MAT SCI & TECHNOL,MECH MAT BRANCH,CODE 6380,WASHINGTON,DC 20375, USA. NR 3 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 0020-7683 J9 INT J SOLIDS STRUCT JI Int. J. Solids Struct. PY 1991 VL 28 IS 5 BP 663 EP 664 DI 10.1016/0020-7683(91)90179-J PG 2 WC Mechanics SC Mechanics GA FY826 UT WOS:A1991FY82600010 ER PT J AU GAUNAURD, GC WERTMAN, W AF GAUNAURD, GC WERTMAN, W TI TRANSIENT ACOUSTIC SCATTERING BY FLUID-LOADED ELASTIC SHELLS SO INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES LA English DT Article ID SPHERICAL-SHELLS; SOUND SCATTERING; RESONANCE; IDENTIFICATION; WAVES; LAMB RP GAUNAURD, GC (reprint author), USN,CTR SURFACE WARFARE,WHITE OAK LAB,SILVER SPRING,MD 20903, USA. NR 35 TC 19 Z9 19 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0020-7683 J9 INT J SOLIDS STRUCT JI Int. J. Solids Struct. PY 1991 VL 27 IS 6 BP 699 EP 711 DI 10.1016/0020-7683(91)90029-F PG 13 WC Mechanics SC Mechanics GA EC827 UT WOS:A1991EC82700003 ER PT J AU LITTLE, B WAGNER, P MANSFELD, F AF LITTLE, B WAGNER, P MANSFELD, F TI MICROBIOLOGICALLY INFLUENCED CORROSION OF METALS AND ALLOYS SO INTERNATIONAL MATERIALS REVIEWS LA English DT Review ID SULFATE-REDUCING BACTERIA; STAINLESS-STEEL; MICROBIAL CORROSION; MILD-STEEL; COPPER; SEAWATER; SURFACES; WATER; SULFIDE; MICROORGANISMS AB In aquatic environments, microorganisms attach to metals and colonise the surface to form biofilms producing an environment at the biofilm/metal interface that is radically different from that of the bulk medium in terms of pH, dissolved oxygen, and organic and inorganic species and leading to electrochemical reactions that control corrosion rates. The term microbiologically influenced corrosion is used to designate corrosion resulting from the presence and activities of microorganisms within biofilms at metal surfaces. Microorganisms can accelerate rates of partial reactions in corrosion processes and shift the mechanism for corrosion. Microbiologically influenced corrosion has received increased attention by corrosion scientists and engineers in recent years with the development of surface analytical and electrochemical techniques that can quantify the impact of microbes on electrochemical phenomena and provide details of corrosion mechanisms. Microbiologically influenced corrosion has been documented for metals exposed to sea water, fresh water, demineralised water, process chemicals, food stuffs, soils, aircraft fuels, human plasma, and sewage. C1 UNIV SO CALIF,DEPT MAT SCI,LOS ANGELES,CA 90089. RP LITTLE, B (reprint author), USN,OCEAN & ATMOSPHER RES LAB,STENNIS SPACE CTR,MS, USA. NR 170 TC 112 Z9 123 U1 4 U2 55 PU ASM INTERNATIONAL PI MATERIALS PARK PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002 SN 0950-6608 J9 INT MATER REV JI Int. Mater. Rev. PY 1991 VL 36 IS 6 BP 253 EP 272 PG 20 WC Materials Science, Multidisciplinary SC Materials Science GA HF068 UT WOS:A1991HF06800002 ER PT J AU WHITE, CT BRENNER, DW MOWREY, RC MINTMIRE, JW SCHMIDT, PP DUNLAP, BI AF WHITE, CT BRENNER, DW MOWREY, RC MINTMIRE, JW SCHMIDT, PP DUNLAP, BI TI D-D (H-H) INTERACTIONS WITHIN THE INTERSTICES OF PD SO JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS LA English DT Article DE PALLADIUM-DEUTERIDES; D2; CLUSTERS; EMBEDDED ATOM METHOD; DENSITY FUNCTIONAL CALCULATIONS; HARTREE-FOCK CALCULATIONS; NUCLEAR FUSION ID DENSITY FUNCTIONAL THEORY; EMBEDDED-ATOM METHOD; COLD FUSION; NUCLEAR-FUSION; HYPERFINE INTERACTIONS; PALLADIUM CLUSTERS; DIATOMIC-MOLECULES; ROOM-TEMPERATURE; DEUTERIUM ATOMS; ELECTRON-GAS AB Embedded atom, local-density-functional, and Hartree-Fock methods are used to calculate the effective interaction between deuterium (or equivalently within the Born-Oppenheimer approximation hydrogen) nuclei within palladium. No effects were found to suggest that the repulsion between deuterons in gas phase D2 is reduced within the octahedral and tetrahedral interstices of this transition metal. C1 OFF NAVAL RES, ARLINGTON, VA 22217 USA. RP USN, RES LAB, WASHINGTON, DC 20375 USA. RI Brenner, Donald/D-1741-2009; OI Mintmire, John/0000-0002-6551-0349; Dunlap, Brett/0000-0003-1356-6559 NR 73 TC 1 Z9 1 U1 1 U2 2 PU JAPAN SOC APPLIED PHYSICS PI TOKYO PA KUDAN-KITA BUILDING 5TH FLOOR, 1-12-3 KUDAN-KITA, CHIYODA-KU, TOKYO, 102-0073, JAPAN SN 0021-4922 J9 JPN J APPL PHYS 1 JI Jpn. J. Appl. Phys. Part 1 - Regul. Pap. Brief Commun. Rev. Pap. PD JAN PY 1991 VL 30 IS 1 BP 182 EP 189 DI 10.1143/JJAP.30.182 PG 8 WC Physics, Applied SC Physics GA EV591 UT WOS:A1991EV59100038 ER PT J AU DIGIOVANNI, C BERLIN, F CASTERELLA, P REDFIELD, RR HIKEN, M FALCK, A MALIN, HM GAGLIANO, S SCHAERF, F ROBERTS, C AF DIGIOVANNI, C BERLIN, F CASTERELLA, P REDFIELD, RR HIKEN, M FALCK, A MALIN, HM GAGLIANO, S SCHAERF, F ROBERTS, C TI PREVALENCE OF HIV ANTIBODY AMONG A GROUP OF PARAPHILIC SEX OFFENDERS SO JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES AND HUMAN RETROVIROLOGY LA English DT Article DE PARAPHILIA; SEX OFFENDERS; SEXUAL BEHAVIOR; HIV PREVALENCE; HIV TRANSMISSION ID INFECTION; CHILD AB Serum specimens from 77 paraphilic sex offenders in treatment at a major community-based sexual disorders clinic were examined for human immunodeficiency virus (HIV) infection. In addition to their paraphilic ("sexually deviant") activities, most patients had also had nonparaphilic sexual contacts with consenting adult partners. These patients had engaged in a variety of sexual behaviors that involved real or potential exchange of body fluids. In spite of that fact, data analysis revealed that none of the 77 paraphilic patients was seropositive for HIV infection as assessed by recombinant enzyme-linked immunosorbent assay (ELISA). C1 WALTER REED ARMY MED CTR, DEPT RETROVIRAL RES, WASHINGTON, DC 20307 USA. WALTER REED ARMY MED CTR, DEPT DIAGNOST RETROVIROL, WASHINGTON, DC 20307 USA. JOHNS HOPKINS UNIV HOSP, DEPT PSYCHIAT, BALTIMORE, MD 21205 USA. USN HOSP, DEPT MED, OAKLAND, CA USA. RP DIGIOVANNI, C (reprint author), NATL NAVAL MED CTR, RETROVIRAL DIS STUDY GRP, BOX 1376, BETHESDA, MD 20814 USA. NR 10 TC 0 Z9 0 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. PY 1991 VL 4 IS 6 BP 633 EP 637 PG 5 WC Immunology; Infectious Diseases SC Immunology; Infectious Diseases GA FM102 UT WOS:A1991FM10200013 PM 2023104 ER PT J AU CONE, EJ WELCH, P MITCHELL, JM PAUL, BD AF CONE, EJ WELCH, P MITCHELL, JM PAUL, BD TI FORENSIC DRUG-TESTING FOR OPIATES .1. DETECTION OF 6-ACETYLMORPHINE IN URINE AS AN INDICATOR OF RECENT HEROIN EXPOSURE - DRUG AND ASSAY CONSIDERATIONS AND DETECTION TIMES SO JOURNAL OF ANALYTICAL TOXICOLOGY LA English DT Article ID GAS-CHROMATOGRAPHY; METABOLITES; IDENTIFICATION; MORPHINE; CODEINE AB The urinary excretion pattens of 6-acetylmorphine (6-AM), free morphine, and total morphine were determined by GC/MS assay for six human subjects who received single doses of 3.0 and 6.0 mg of heroin hydrochloride. Clinical specimens were collected and combined with standardized drug urines into a 400 specimen/standard set. The urines were coded, randomized, and analyzed under blind conditions. The GC/MS assay had a limit of sensitivity of 0.81 ng/mL for 6-AM and displayed a lenear response across a concentration range of 1-100 ng/mL. Following heroin administration, 6-AM was excreted rapidly with an average half-life of 0.6 h. This resulted in a very short detection time for 6-AM with a range of 2-8 h at the most sensitive cutoff limit. This short detection time limits the usefulness of 6-AM as a marker for identification of heroin absers to a period immediately after drug use. In contrast, free morphine and total morphine were detectable up to approximately 24 h after heroin administration. The average half-life for free morphine was 3.6 h and for total morphine was 7.9 h. After morphine and codeine administration, no 6-AM was detected by GC/MS above the 0.81-ng/mL detection limit of the assay. It is concluded that the presence of 6-AM in urine can be interpreted with confidence to mean that heroin, or 6-AM, was administered within 24 h of specimen collection and that the presence of 6-AM in urine is not caused by morphine or codeine administration. C1 USN,DRUG SCREENING LAB,NORFOLK,VA 23511. RP CONE, EJ (reprint author), NIDA,ADDICT RES CTR,POB 5180,BALTIMORE,MD 21224, USA. NR 14 TC 115 Z9 116 U1 0 U2 6 PU PRESTON PUBLICATIONS INC PI NILES PA 7800 MERRIMAC AVE PO BOX 48312, NILES, IL 60648 SN 0146-4760 J9 J ANAL TOXICOL JI J. Anal. Toxicol. PD JAN-FEB PY 1991 VL 15 IS 1 BP 1 EP 7 PG 7 WC Chemistry, Analytical; Toxicology SC Chemistry; Toxicology GA ET783 UT WOS:A1991ET78300001 PM 2046334 ER PT J AU GULWADI, SM RAO, MV SIMONS, DS HOLLAND, OW HONG, WP CANEAU, C DIETRICH, HB AF GULWADI, SM RAO, MV SIMONS, DS HOLLAND, OW HONG, WP CANEAU, C DIETRICH, HB TI RANGE STATISTICS AND RUTHERFORD BACKSCATTERING STUDIES ON FE-IMPLANTED IN0.53GA0.47AS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID HETEROSTRUCTURE INGAASP/INP LASER; SHALLOW P+ LAYER; CO-IMPLANT; ION; P/BE; INP AB Single-energy Fe implantation at energies in the range 50 keV-2MeV to achieve a peak Fe concentration of 1-2x10(18) cm-3 is performed into undoped (n-type) InGaAs layers grown on InP:Fe. The first four statistical moments of the Fe profiles measured by secondary-ion mass spectrometry are determined. The Pearson IV distribution calculated from these moments matches the implant-profile closely. Samples implanted with Fe to doses in the range 5x10(12)-2x10(15) cm-2 at 380 keV are analyzed by Rutherford backscattering measurements to study ion-induced damage. For 380-keV implants, amorphization begins at a dose of almost-equal-to 3 x 10(13)cm-2. C1 NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. BELLCORE,RED BANK,NJ 07701. USN,RES LAB,WASHINGTON,DC 20375. RP GULWADI, SM (reprint author), GEORGE MASON UNIV,DEPT ELECT & COMP ENGN,FAIRFAX,VA 22030, USA. NR 25 TC 9 Z9 9 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 JAN 1 PY 1991 VL 69 IS 1 BP 162 EP 167 DI 10.1063/1.347738 PG 6 WC Physics, Applied SC Physics GA ER430 UT WOS:A1991ER43000028 ER PT J AU STESMANS, A REVESZ, AG HUGHES, HL AF STESMANS, A REVESZ, AG HUGHES, HL TI ELECTRON-SPIN-RESONANCE OF DEFECTS IN SILICON-ON-INSULATOR STRUCTURES FORMED BY OXYGEN IMPLANTATION - INFLUENCE OF GAMMA-IRRADIATION SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID HYDROGENATED AMORPHOUS-SILICON; QUALITY SI-ON-SIO2 FILMS; PARAMAGNETIC CENTERS; ION-IMPLANTATION; SI-H; DONORS AB Silicon-on-insulator structures obtained by single-step implantations of oxygen followed by high temperature annealing were studied by K-band electron spin resonance (ESR) at 4.3-31 K. The spectrum has a strong line at g = 2.0059 +/- 0.0001 with a spin density of 7.1 x 10(13) cm-2. Various features indicate that it is very similar to that characteristic of dangling Si-bonds (DBs) in a-Si but different from the ESR signal of the P(b) center associated with single-crystal-Si/SiO2 interfaces. Irradiation by gamma-rays to a dose of 1 Mrad(Si) resulted in a 2.5-fold increase in DB density and in the appearance of a new, anisotropic signal of spin density 1.1 x 10(12) cm-2. The latter signal is similar to that originating from a shallow donor in Si, of axial symmetry and preferentially aligned along [001]. It is tentatively assigned to an oxygen-related double donor in Si regions close to the Si/SiO2 interface and/or in the buried oxide. These donor are not generated by irradiation; rather, their ionization state is altered through band bending tuning resulting from irradiation-induced charges in the oxide. C1 USN, RES LAB, DIV ELECTR TECHNOL, WASHINGTON, DC 20375 USA. REVESZ ASSOCIATES, BETHESDA, MD 20817 USA. RP STESMANS, A (reprint author), CATHOLIC UNIV LEUVEN, DEPT NATUURKUNDE, B-3030 HEVERLEE, BELGIUM. NR 42 TC 20 Z9 20 U1 0 U2 1 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 1 PY 1991 VL 69 IS 1 BP 175 EP 181 DI 10.1063/1.348934 PG 7 WC Physics, Applied SC Physics GA ER430 UT WOS:A1991ER43000030 ER PT J AU MORRILL, JS BENESCH, WM WIDING, KG AF MORRILL, JS BENESCH, WM WIDING, KG TI ELECTRON TEMPERATURES IN A PULSED ELECTRIC-DISCHARGE AND THE ASSOCIATED N-2 ELECTRON-EXCITATION RATE COEFFICIENTS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID INTERSYSTEM COLLISIONAL TRANSFER; STATES; 2-PI; N2 AB Investigations of excitation processes of molecular nitrogen in pulsed electric discharges have been focused on the N2 first positive system (1PG) which corresponds to the transition, N2(B3-II(g) --> A3-SIGMA-u+). Our observations indicate the collisions during the afterglow which follows the 4-mu-s current pulse couple the vibrational levels of the B3 II(g) state with those of the overlapping triplet states (A3-SIGMA-u+, W3-DELTA-u, B'3-SIGMA-u-) by the intersystem collisional transfer of excitation (ICT). In order to model the effect of this process we must first estimate the relative direct electron excitation rates of these overlapping states. This, in turn, requires knowledge of the electron energies during the course of the electric discharge. We have used the Balmer series H-alpha/H-beta intensity ratio to measure the varying electron temperatures that occur during the pulse for a number of experimental conditions. The electron temperatures which we observe range from 5 000 to 11 000 K. This is below the temperatures for which electron excitation rate coefficients for N2 excited states have been tabulated previously, so we also present these coefficients for electron temperatures from 1 000 to 15 000 K. C1 USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. UNIV MARYLAND,INST PHYS SCI & TECHNOL,COLLEGE PK,MD 20742. NR 21 TC 9 Z9 9 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JAN 1 PY 1991 VL 94 IS 1 BP 262 EP 269 DI 10.1063/1.460393 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA ET473 UT WOS:A1991ET47300029 ER PT J AU LONGO, DL DEVITA, VT DUFFEY, PL WESLEY, MN IHDE, DC HUBBARD, SM GILLIOM, M JAFFE, ES COSSMAN, J FISHER, RI YOUNG, RC AF LONGO, DL DEVITA, VT DUFFEY, PL WESLEY, MN IHDE, DC HUBBARD, SM GILLIOM, M JAFFE, ES COSSMAN, J FISHER, RI YOUNG, RC TI SUPERIORITY OF PROMACE-CYTABOM OVER PROMACE-MOPP IN THE TREATMENT OF ADVANCED DIFFUSE AGGRESSIVE LYMPHOMA - RESULTS OF A PROSPECTIVE RANDOMIZED TRIAL SO JOURNAL OF CLINICAL ONCOLOGY LA English DT Article ID NON-HODGKINS LYMPHOMA; LARGE-CELL LYMPHOMA; BONE-MARROW TRANSPLANTATION; COMBINATION CHEMOTHERAPY; HISTIOCYTIC LYMPHOMA; MALIGNANT-LYMPHOMA; AUTOLOGOUS MARROW; PREDNISONE BACOP; POOR-PROGNOSIS; CYCLOPHOSPHAMIDE C1 NCI,DIV CANC BIOL & DIAG,DIV CANC TREATMENT,BETHESDA,MD 20892. NCI,DIV CANC BIOL & DIAG,CTR CANC INFORMAT,BETHESDA,MD 20892. INFORMAT MANAGEMENT SERV INC,SILVER SPRING,MD. MEM SLOAN KETTERING CANC CTR,NEW YORK,NY 10021. MED BRANCH,BETHESDA,MD. NCI,DIV CANC BIOL & DIAG,DIV CANC TREATMENT,USN,MED ONCOL BRANCH,CLIN ONCOL PROGRAM,BETHESDA,MD 20892. GEORGETOWN UNIV,SCH MED,DEPT PATHOL,WASHINGTON,DC 20057. LOYOLA UNIV,SCH MED,HEMATOL ONCOL SECT,MAYWOOD,IL 60153. FOX CHASE CANC INST,PHILADELPHIA,PA 19111. NCI,DIV CANC BIOL & DIAG,PATHOL LAB,HEMATOPATHOL SECT,BETHESDA,MD 20892. RP LONGO, DL (reprint author), NCI,FREDERICK CANC RES FACIL,DIV CANC TREATMENT,BIOL RESPONSE MODIFIERS PROGRAM,BLDG 567,FREDERICK,MD 21701, USA. NR 35 TC 203 Z9 204 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0732-183X J9 J CLIN ONCOL JI J. Clin. Oncol. PD JAN PY 1991 VL 9 IS 1 BP 25 EP 38 PG 14 WC Oncology SC Oncology GA EP763 UT WOS:A1991EP76300005 PM 1702144 ER PT J AU DAVIS, RW CASTELLINI, MA WILLIAMS, TM KOOYMAN, GL AF DAVIS, RW CASTELLINI, MA WILLIAMS, TM KOOYMAN, GL TI FUEL HOMEOSTASIS IN THE HARBOR SEAL DURING SUBMERGED SWIMMING SO JOURNAL OF COMPARATIVE PHYSIOLOGY B-BIOCHEMICAL SYSTEMIC AND ENVIRONMENTAL PHYSIOLOGY LA English DT Article DE PHOCA-VITULINA; SWIMMING; METABOLISM; FUEL ID FREE FATTY-ACIDS; PHOCA-VITULINA; WEDDELL SEALS; BLOOD-CHEMISTRY; GLUCOSE; METABOLISM; EXERCISE; RATS; PERFORMANCE; LACTATE AB 1. The turnover rates and oxidation rates of plasma glucose, lactate, and free fatty acids (FFA) were measured in three harbor seals (average mass = 40 kg) at rest or during voluntary submerged swimming in a water flume at 35% (1.3 m.s-1) and 50% (2 m.s-1) of maximum oxygen consumption (MO2max). 2. For seals resting in water, the total turnover rates for glucose, lactate, and FFA were 23.2, 26.2, and 7.5-mu-mol . min-1 . kg-1, respectively. Direct oxidation of these metabolites accounted for approximately 7%, 27%, and 33% of their turnover and 3%, 7%, and 18% of the total ATP production, respectively. 3. For swimming seals, MO2max was achieved at a drag load equivalent to a speed of 3 m . s-1 and averaged 1.85 mmol O2 . min-1 . kg-1, which is 9-fold greater than resting metabolism in water at 18-degrees-C. 4. At 35% and 50% MO2max, glucose turnover and oxidation rates did not change from resting levels. Glucose oxidation contributed about 1% of the total ATP production during swimming. 5. At 50% MO2max, lactate turnover and anaerobic ATP production doubled, but the steady state plasma lactate concentration remained low at 1.1 mM. Lactate oxidation increased 63% but still contributed only 4% of the total ATP production. Anaerobic metabolism contributed about 1% of the total ATP production at rest and during swimming. 6. The plasma FFA concentration and turnover rate increased only 24% and 37% over resting levels, respectively, at 50% MO2max. However, the oxidation rate increased almost 3.5-fold and accounted for 85% of the turnover. The percentage of total ATP produced (21%) from FFA oxidation at 35% and 50% MO2max did not increase greatly over that at rest. 7. Dive duration decreased from 78 s while resting in water to 28 s at 50% MO2max. 8. The RQ ranged from 0.78 at rest to 0.74 at 50% MO2max, indicating that fat was an important source of energy during submerged swimming. 9. By adjusting breath-hold duration during strenuous underwater swimming, harbor seals are able to maintain an aerobic, fat-based metabolism. C1 UNIV ALASKA,INST MARINE SCI,FAIRBANKS,AK 99775. USN,CTR OCEAN SYST,KAILUA,HI 96734. RP DAVIS, RW (reprint author), SCRIPPS INST OCEANOG,PHYSIOL RES LAB,LA JOLLA,CA 92037, USA. FU NHLBI NIH HHS [HL17731] NR 39 TC 35 Z9 36 U1 1 U2 11 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0174-1578 J9 J COMP PHYSIOL B JI J. Comp. Physiol. B-Biochem. Syst. Environ. Physiol. PY 1991 VL 160 IS 6 BP 627 EP 635 DI 10.1007/BF00571260 PG 9 WC Physiology; Zoology SC Physiology; Zoology GA EZ530 UT WOS:A1991EZ53000005 PM 2045543 ER PT J AU DEVORE, CR AF DEVORE, CR TI FLUX-CORRECTED TRANSPORT TECHNIQUES FOR MULTIDIMENSIONAL COMPRESSIBLE MAGNETOHYDRODYNAMICS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID SELF-SIMILAR MAGNETOHYDRODYNAMICS; ALGORITHMS; FLOWS RP USN, RES LAB, COMPUTAT PHYS & FLUID DYNAM LAB, WASHINGTON, DC 20375 USA. RI DeVore, C/A-6067-2015 OI DeVore, C/0000-0002-4668-591X NR 15 TC 146 Z9 148 U1 0 U2 7 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 EI 1090-2716 J9 J COMPUT PHYS JI J. Comput. Phys. PD JAN PY 1991 VL 92 IS 1 BP 142 EP 160 DI 10.1016/0021-9991(91)90295-V PG 19 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA ET415 UT WOS:A1991ET41500005 ER PT J AU BOTTKA, N GASKILL, DK WRIGHT, PD KALISKI, RW WILLIAMS, DA AF BOTTKA, N GASKILL, DK WRIGHT, PD KALISKI, RW WILLIAMS, DA TI QUALIFICATION OF OMVPE ALGAAS/GAAS HBT STRUCTURES USING NONDESTRUCTIVE PHOTOREFLECTANCE SPECTROSCOPY SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 5TH INTERNATIONAL CONF ON METALORGANIC VAPOR PHASE EPITAXY / WORKSHOP ON METALORGANIC BEAM EPITAXY, CHEMICAL BEAM EPITAXY AND GAS SOURCE MOLECULAR BEAM EPITAXY CY JUN 18-22, 1990 CL AACHEN, FED REP GER SP DEUT GESELL KRISTALLWACHSTUM & KRISTALLZUCHTUNG, AIXTRON, SIEMENS, MERCK, DEUT FORSCHUNGSGEMEINSCH, MINIST WISSENSCH & FORSCH FED REP GER, EUROPEAN OFF AEROSP RES & DEV, WACKER CHEMITRON, IBM, AACHENER GESELL INNOVAT & TECNOLOGIETRANSFER AB High performance heterojunction bipolar transistor (HBT) integrated circuits are extremely dependent upon the uniformity and quality of the III-V compound heteroepitaxial materials used in their fabrication. HBT requirements include the need for excellent control over layer thickness, uniformity, alloy composition, and intentional impurity concentration over a wide range of carrier concentrations. We have used the contactless technique of photoreflectance (PR) to evaluate HBT structures of various epitaxial layer design and correlated the measured PR results with transistor performance. PR was performed in the range 1.3-2.0 eV which is ideally suited to probing AlGaAs/GaAs HBT structures. The resulting signals gave information about the gap energy of the material probed (and thus its composition) and the built-in DC electric fields within the various epitaxial layers. Measurement of the spectral energy of the observed Franz-Keldysh oscillation extrema near the GaAs and AlGaAs edges, were used to determine the built-in electric field in the collector and the emitter regions. These measured fields were in good agreement with electric field distribution calculations obtained by solving the Poisson and the continuity equations for an HBT structure. Run-to-run uniformity of HBT structures from a multi-wafer OMVPE reactor were correlated to measured transistor characteristics. C1 FORD MICROELECTR INC,COLORADO SPRINGS,CO 80908. RP BOTTKA, N (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 10 TC 28 Z9 28 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 JAN PY 1991 VL 107 IS 1-4 BP 893 EP 897 DI 10.1016/0022-0248(91)90576-Q PG 5 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA EY072 UT WOS:A1991EY07200150 ER PT J AU LACIVITA, CJ FREDERIKSEN, PC AF LACIVITA, CJ FREDERIKSEN, PC TI DEFENSE SPENDING AND ECONOMIC-GROWTH - AN ALTERNATIVE APPROACH TO THE CAUSALITY ISSUE SO JOURNAL OF DEVELOPMENT ECONOMICS LA English DT Article ID DEVELOPING-COUNTRIES; GRANGER CAUSALITY; EXPENDITURES; INCOME; MONEY RP LACIVITA, CJ (reprint author), USN,POSTGRAD SCH,MONTEREY,CA 93943, USA. NR 14 TC 22 Z9 22 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-3878 J9 J DEV ECON JI J. Dev. Econ. PD JAN PY 1991 VL 35 IS 1 BP 117 EP 126 DI 10.1016/0304-3878(91)90069-8 PG 10 WC Economics SC Business & Economics GA FD679 UT WOS:A1991FD67900006 ER PT J AU GAUNAURD, GC STRIFORS, HC WERTMAN, WH AF GAUNAURD, GC STRIFORS, HC WERTMAN, WH TI TRANSIENT EFFECTS IN THE SCATTERING OF ARBITRARY EM PULSES BY DIELECTRIC SPHERICAL TARGETS SO JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS LA English DT Article AB We study the general scattering interaction of electromagnetic (EM) pulses of arbitrary shape and duration with a spherical target. The target is assumed penetrable and we model it either as totally dielectric, or as perfectly conducting but covered with a thin outer masking coating of a dielectric material. We obtain the radar cross-sections (RCS) of such targets and analyze the many resonance features that are present within their resonance region. The dielectric composition makes the resonance features become very prominent and it relates them to the eigenfrequencies in ways analogous to those of the Singularity Expansion Method (SEM), originally developed for perfectly conducting scatterers. Transient echoes from these targets are linked to poles and residues in the complex-frequency plane. The individual resonances associated with each pole (i.e., eigenfrequencies) can be studied one at a time, provided we use long illuminating pulses since these excite transients at their carrier frequencies that ring and decay. Of greater importance is the use of short pulses, since these are shown to replicate the entire RCS of the target in bands that have widths directly proportional to their energy and carrier frequency. We develop a methodology that can handle pulses of any conceivable spectra, interacting with (lossy or lossless) dielectric scatterers, and predict the backscattered returns. We illustrate it for various types of scatterers' compositions and/or pulses, with displays in the frequency and time domains, and give physical interpretations of the results. RP GAUNAURD, GC (reprint author), USN,CTR SURFACE WARFARE,WHITE OAK,SILVER SPRING,MD 20903, USA. NR 0 TC 7 Z9 7 U1 0 U2 0 PU VSP BV PI ZEIST PA PO BOX 346, 3700 AH ZEIST, NETHERLANDS SN 0920-5071 J9 J ELECTROMAGNET WAVE JI J. Electromagn. Waves Appl. PY 1991 VL 5 IS 1 BP 75 EP 92 PG 18 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA EX171 UT WOS:A1991EX17100005 ER PT J AU KIM, CS AF KIM, CS TI SCATTERING OF AN OBLIQUELY INCIDENT WAVE BY A COATED ELLIPTIC CONDUCTING CYLINDER SO JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS LA English DT Article AB The problem of scattering by a coated elliptical conducting cylinder which extends infinitely long in the Z direction is analyzed when a plane electromagnetic wave is obliquely incident. The medium of the layer is assumed homogeneous and isotropic but lossy. Since the scattering object is an elliptical cylinder, the solutions of the wave equation are given in terms of radial and angular Mathieu functions. The analyses of the E-Wave and the H-Wave incidence cases axe considered separately. The boundary conditions are applied at two surfaces to obtain the expansion coefficients of the scattered and transmitted waves. Bistatic radar cross sections, specular differential cross sections, and efficiency factors axe determined with these coefficients. RP KIM, CS (reprint author), USN,CTR UNDERWATER SYST,DEPT SUBMARINE ELECTROMAGNET SYST,NEW LONDON,CT 06320, USA. NR 0 TC 3 Z9 3 U1 0 U2 1 PU VSP BV PI ZEIST PA PO BOX 346, 3700 AH ZEIST, NETHERLANDS SN 0920-5071 J9 J ELECTROMAGNET WAVE JI J. Electromagn. Waves Appl. PY 1991 VL 5 IS 11 BP 1169 EP 1186 PG 18 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA GQ039 UT WOS:A1991GQ03900001 ER PT J AU KENNEDY, TA GLASER, E AF KENNEDY, TA GLASER, E TI ELECTRON-PARAMAGNETIC RESONANCE AND OPTICALLY-DETECTED MAGNETIC-RESONANCE OF DONORS IN ALXGA1-XAS SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article; Proceedings Paper CT SESSION AT THE 1989 CONF ON ELECTRONIC MATERIALS - DX PHENOMENA : PAST, PRESENT, FUTURE CY JUN 21, 1989 CL MIT, CAMBRIDGE, MA HO MIT DE ALGAAS; ELECTRON PARAMAGNETIC RESONANCE; DONORS; DX CENTERS ID DX CENTER; ANTISITE DEFECT; SPIN-RESONANCE; GAAS; ODMR; ALAS; GAP; LUMINESCENCE; GA1-XALXAS; CRYSTALS AB The Electron Paramagnetic Resonance (EPR) and Optically-Detected Magnetic Resonance (ODMR) work on Si-donors in Al(x)Ga1-xAs is reviewed in the context of the shallow-deep bistability (DX) problem. Three donor states are important. Little work has been published on donors tied to the T-minimum. However, there are many results for X-donors. In AlAs/GaAs heterostructures, well-resolved spectra reveal a donor state comprised of independent X(x) and X(y) valleys with the X(z) valley unpopulated due to the hetero-epitaxial strain. As Al mole fraction decreases, intervalley coupling is evident from the line positions and linewidths. The published attempts to observe and identify the deep (relaxed) state are inconclusive. Some suggestions for future work are presented. RP KENNEDY, TA (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 33 TC 1 Z9 1 U1 1 U2 4 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 JAN PY 1991 VL 20 IS 1 BP 49 EP 54 DI 10.1007/BF02651964 PG 6 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA EV988 UT WOS:A1991EV98800006 ER PT J AU PAO, PS BAYLES, RA YODER, GR AF PAO, PS BAYLES, RA YODER, GR TI EFFECT OF RIPPLE LOAD ON STRESS-CORROSION CRACKING IN STRUCTURAL-STEELS SO JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME LA English DT Article ID FREQUENCY; GROWTH AB The presence of small ripple loading can, under certain circumstances, significantly reduce time-to-failure and threshold stress intensity for stress-corrosion cracking (SCC) of steels. A predictive framework for such ripple-loading effects (RLE) is developed from concepts and descriptors used in SCC and corrosion fatigue characterization. The proposed framework is capable of defining critical conditions required for the occurrence of RLE and predicting the time-to-failure curves. The agreement between the predicted and laboratory data is excellent. C1 USN,OFF RES,ARLINGTON,VA 22217. RP PAO, PS (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 18 TC 4 Z9 4 U1 1 U2 1 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0094-4289 J9 J ENG MATER-T ASME JI J. Eng. Mater. Technol.-Trans. ASME PD JAN PY 1991 VL 113 IS 1 BP 125 EP 129 DI 10.1115/1.2903367 PG 5 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA FE819 UT WOS:A1991FE81900017 ER PT J AU QUIRK, J TERASAWA, K AF QUIRK, J TERASAWA, K TI CHOOSING A GOVERNMENT DISCOUNT RATE - AN ALTERNATIVE APPROACH SO JOURNAL OF ENVIRONMENTAL ECONOMICS AND MANAGEMENT LA English DT Article C1 US NAVAL POSTGRAD SCH,MONTEREY,CA 93940. RP QUIRK, J (reprint author), CALTECH,PASADENA,CA 91125, USA. NR 8 TC 7 Z9 7 U1 0 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0095-0696 J9 J ENVIRON ECON MANAG JI J.Environ.Econ.Manage. PD JAN PY 1991 VL 20 IS 1 BP 16 EP 28 DI 10.1016/0095-0696(91)90020-J PG 13 WC Business; Economics; Environmental Studies SC Business & Economics; Environmental Sciences & Ecology GA EP002 UT WOS:A1991EP00200002 ER PT J AU BLACKLEDGE, RD AF BLACKLEDGE, RD TI METHENAMINE - AN UNUSUAL COMPONENT IN AN IMPROVISED INCENDIARY DEVICE SO JOURNAL OF FORENSIC SCIENCES LA English DT Article DE CRIMINALISTICS; EXPLOSIVES; INCENDIARY DEVICES; METHENAMINE AB An improvised incendiary device intended to be concealed in a cigarette pack was recovered before its assembly was completed. The chemical components identified were concentrated sulfuric acid, sucrose, potassium chlorate, and methenamine. Methenamine will support combustion and was probably included as a fuel to keep the fire burning longer. RP BLACKLEDGE, RD (reprint author), USN,INVEST SERV REG FORENS LAB,POB 220,NAVAL STN,SAN DIEGO,CA 92136, USA. NR 5 TC 2 Z9 2 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 JAN PY 1991 VL 36 IS 1 BP 261 EP 263 PG 3 WC Medicine, Legal SC Legal Medicine GA FJ853 UT WOS:A1991FJ85300034 ER PT J AU WUEBBLES, DJ KINNISON, DE GRANT, KE LEAN, J AF WUEBBLES, DJ KINNISON, DE GRANT, KE LEAN, J TI THE EFFECT OF SOLAR FLUX VARIATIONS AND TRACE GAS EMISSIONS ON RECENT TRENDS IN STRATOSPHERIC OZONE AND TEMPERATURE SO JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY LA English DT Article; Proceedings Paper CT 7TH QUADRENNIAL SOLAR TERRESTRIAL SYMP / 27TH COSPAR MEETING CY JUL 25-30, 1990 CL THE HAGUE, NETHERLANDS SP COMM SPACE RES, INT ASSOC GEOMAGNETISM & AERON, INT ASSOC METEOROL & ATMOSPHER PHYS, INT ASTRON UNION, INT UNION RADIO SCI, INT UNION PURE & APPL PHYS ID MIDDLE ATMOSPHERE; IRRADIANCE AB Trend analyses of satellite and ground-based observations clearly indicate that temperatures and ozone concentrations in the upper stratosphere are undergoing long-term changes. Variations in solar ultraviolet radiation during the 11-year solar cycle are influencing stratospheric temperatures and photochemistry from above. Forcings from below result from the increasing atmospheric concentrations of long-lived trace constituents, such as carbon dioxide, methane, nitrous oxide, several chloro-fluorocarbons and other halocarbons. Using the LLNL two-dimensional chemical-radiative-transport model of the global atmosphere, we evaluate the influences of these external forcings on the middle atmosphere. Our calculations include recent estimates of the variations in solar ultraviolet radiation since 1974. Model results for the solar cycle effects on total ozone, upper stratospheric ozone and temperature are within the uncertainty (in some cases, large) range of observational data analyses. The model calculations including both solar variability and the effects of changing trace gas emissions can explain much of the observed trends in upper stratospheric ozone and temperature from 1979 to 1986. C1 USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. RP WUEBBLES, DJ (reprint author), LAWRENCE LIVERMORE NATL LAB,DIV ATMOSPHER & GEOPHYS SCI,LIVERMORE,CA 94550, USA. OI Lean, Judith/0000-0002-0087-9639 NR 22 TC 33 Z9 33 U1 0 U2 1 PU TERRA SCIENTIFIC PUBL CO PI TOKYO PA 2003 SANSEI JIYUGAOKA HAIMU, 5-27-19 OKUSAWA, SETAGAYA-KU, TOKYO 158, JAPAN SN 0022-1392 J9 J GEOMAGN GEOELECTR JI J. Geomagn. Geoelectr. PY 1991 VL 43 SU S BP 709 EP 718 PN 2 PG 10 WC Geosciences, Multidisciplinary SC Geology GA JW706 UT WOS:A1991JW70600012 ER PT J AU RUHNKE, LH AF RUHNKE, LH TI THE GLOBAL ATMOSPHERIC ELECTRIC-CIRCUIT AND GAEM SO JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY LA English DT Article; Proceedings Paper CT 7TH QUADRENNIAL SOLAR TERRESTRIAL SYMP / 27TH COSPAR MEETING CY JUL 25-30, 1990 CL THE HAGUE, NETHERLANDS SP COMM SPACE RES, INT ASSOC GEOMAGNETISM & AERON, INT ASSOC METEOROL & ATMOSPHER PHYS, INT ASTRON UNION, INT UNION RADIO SCI, INT UNION PURE & APPL PHYS ID FIELDS AB Electrical currents and fields in fair weather near the surface of the earth are part of a global circuit. Thunderstorms are the main source generators. The classical model of a global circuit assumes an equipotential layer at high altitude to act as the connecting link between thunderstorms and fair weather areas. Recently, evidence is mounting that extraterrestrial sources of currents and ionization do modulate the global circuit to a measurable degree. Electric fields at the surface and at balloon altitude correlate at times with geomagnetic activity or solar flares. Problems associated with detecting such modulations are inadequate measurement techniques, local space charge noise, and the need to maintain widely spaced observation stations with good time synchronization. Newer modeling efforts have included non-isotropic current flows along magnetic field lines and thus opened the global circuit to the study of influences from extraterrestrial sources. An international project on Global Atmospheric Electricity Measurements (GAEM) has been defined. Measurements will focus on synchronized measurements of electric field and Maxwell current densities in the time domain of seconds to hours and their correlation to solar variability. RP RUHNKE, LH (reprint author), USN,RES LAB,DIV SPACE SCI,WASHINGTON,DC 20375, USA. NR 22 TC 1 Z9 1 U1 1 U2 1 PU TERRA SCIENTIFIC PUBL CO PI TOKYO PA 2003 SANSEI JIYUGAOKA HAIMU, 5-27-19 OKUSAWA, SETAGAYA-KU, TOKYO 158, JAPAN SN 0022-1392 J9 J GEOMAGN GEOELECTR JI J. Geomagn. Geoelectr. PY 1991 VL 43 SU S BP 817 EP 821 PN 2 PG 5 WC Geosciences, Multidisciplinary SC Geology GA JW706 UT WOS:A1991JW70600023 ER PT J AU RACE, CM SALDANA, MJ AF RACE, CM SALDANA, MJ TI ANATOMIC COURSE OF THE MEDIAL CUTANEOUS NERVES OF THE ARM SO JOURNAL OF HAND SURGERY-AMERICAN VOLUME LA English DT Article AB The medial antebrachial cutaneous nerve and the medial brachial cutaneous nerve were dissected in twenty fresh cadaver extremities. These nerves have a variable number of cutaneous branches ranging from four to twelve, with an average of eight. Branches always originated medially in both nerves and ran in an anterolateral direction. In all the medial antebrachial cutaneous nerves, there were three to five terminal branches directly overlying the medial epicondyle and supplying the skin over the olecranon. The course of this nerve is predictable relative to the basilic vein and the medial epicondyle. There was a ninety percent incidence of communication between the medial brachial cutaneous nerve and the intercostobrachial cutaneous nerve. The standard incision used for surgery of the ulnar nerve at the elbow will cut the terminal branches of the medial antebrachial cutaneous nerve one hundred percent of the time, and the terminal branches of the medial brachial cutaneous nerve eighty percent of the time, if they are not identified. A posterior approach for transposition of the ulnar nerve would avoid damage to these nerves. C1 USN,PORTSMOUTH HOSP,DEPT ORTHOPED,PORTSMOUTH,VA 23708. NR 0 TC 34 Z9 37 U1 0 U2 0 PU CHURCHILL LIVINGSTONE INC MEDICAL PUBLISHERS PI NEW YORK PA 650 AVENUE OF THE AMERICAS, NEW YORK, NY 10011 SN 0363-5023 J9 J HAND SURG-AM JI J. Hand Surg.-Am. Vol. PD JAN PY 1991 VL 16A IS 1 BP 48 EP 52 PG 5 WC Orthopedics; Surgery SC Orthopedics; Surgery GA EU716 UT WOS:A1991EU71600010 PM 1995693 ER PT J AU BROOK, I AF BROOK, I TI THE EFFECT OF ANTIMICROBIAL THERAPY ON MIXED INFECTIONS WITH BACTEROIDES SPECIES - IS ERADICATION OF THE ANAEROBES IMPORTANT SO JOURNAL OF INFECTION LA English DT Article ID METRONIDAZOLE; BACTERIA; MELANINOGENICUS; ABSCESSES; MICE; GROWTH; SEPSIS RP BROOK, I (reprint author), USN,MED RES INST,ARMED FORCES RADIOBIOL RES INST,BETHESDA,MD 20814, USA. NR 29 TC 6 Z9 6 U1 0 U2 0 PU W B SAUNDERS CO LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0163-4453 J9 J INFECTION JI J. Infect. PD JAN PY 1991 VL 22 IS 1 BP 27 EP 35 DI 10.1016/0163-4453(91)90870-X PG 9 WC Infectious Diseases SC Infectious Diseases GA EV230 UT WOS:A1991EV23000005 PM 2002230 ER PT J AU GILBREATH, GC AF GILBREATH, GC TI FORWARD MULTIBEAM MIXING IN DIFFUSION-DRIVEN PHOTOREFRACTIVE MEDIA SO JOURNAL OF LIGHTWAVE TECHNOLOGY LA English DT Article AB Multibeam mixing in diffusion-driven media is presented in this paper as a diagnostic for the study of nonplane wave photorefractive interactions based on the premise that a complex wavefront can be analyzed as the superposition of many plane waves. Couplednonlinear differential equations are derived which describe the interactions of the intensities as they couple through the medium. These equations were numerically solved using a Runge-Kutta algorithm to gain insight as to how the beams interact in the medium. Three beam interaction was studied in BaTiO3 at 514.5 nm experimentally to verify the analysis. Results indicate that phase aberrations affect intensity distributions in the enhanced beam. RP GILBREATH, GC (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 25 TC 8 Z9 8 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 JAN PY 1991 VL 9 IS 1 BP 105 EP 112 DI 10.1109/50.64929 PG 8 WC Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Optics; Telecommunications GA EQ811 UT WOS:A1991EQ81100014 ER PT J AU CHAKRABARTI, K MATHUR, VK ABBUNDI, RJ KRISTIANPOLLER, N HORNYAK, WF AF CHAKRABARTI, K MATHUR, VK ABBUNDI, RJ KRISTIANPOLLER, N HORNYAK, WF TI STUDY OF LOW-TEMPERATURE LUMINESCENCE AND THERMOLUMINESCENCE IN CALCIUM-FLUORIDE CRYSTALS SO JOURNAL OF LUMINESCENCE LA English DT Article ID STIMULATED LUMINESCENCE; CAF2-MN AB We report here the temperature dependence study of X-ray excited luminescence from 15 to 300 K of the self-trapped exciton in CaF2 undoped and doped with Dy3+ ions. The mechanisms of TL emissions which are associated with both the electron and the hole release processes are also described. C1 UNIV MARYLAND,PHYS & ASTRON,COLLEGE PK,MD 20742. ADV TECHNOL & RES CORP,LAUREL,MD 20707. TEL AVIV UNIV,RAYMOND & BEVERLY SACLER FAC EXACT SCI,SCH PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL. RP CHAKRABARTI, K (reprint author), USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903, USA. NR 16 TC 6 Z9 6 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-2313 J9 J LUMIN JI J. Lumines. PD JAN-FEB PY 1991 VL 48-9 BP 828 EP 832 DI 10.1016/0022-2313(91)90251-P PN 2 PG 5 WC Optics SC Optics GA FC746 UT WOS:A1991FC74600085 ER PT J AU CHOW, GM CHIEN, CL EDELSTEIN, AS AF CHOW, GM CHIEN, CL EDELSTEIN, AS TI FORMATION THRESHOLD AND STRUCTURAL EVOLUTION OF MOLYBDENUM NANOCRYSTALS WITH SPUTTERING PRESSURE SO JOURNAL OF MATERIALS RESEARCH LA English DT Note ID METAL PARTICLES AB The evolution of the size and shape of molybdenum nanocrystals fabricated by sputtering in a thermal gradient has been studied as a function of the argon gas pressure, p. For 4 < p < 100 mTorr, continuous Mo films are deposited. At p = 150 mTorr, isolated and well-faceted Mo nanocrystals of two sizes (20 and 5 nm average size) are formed. For 200 less-than-or-equal-to p less-than-or-equal-to 400 mTorr, the particle size decreases with increasing pressure and is about 7 nm at 400 mTorr. On increasing p further, larger particles start to form and at p = 700 mTorr, particle agglomerates are observed. Possible mechanisms leading to these results are suggested. C1 JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,BALTIMORE,MD 21218. RP CHOW, GM (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 8 TC 23 Z9 23 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD JAN PY 1991 VL 6 IS 1 BP 8 EP 10 DI 10.1557/JMR.1991.0008 PG 3 WC Materials Science, Multidisciplinary SC Materials Science GA FB958 UT WOS:A1991FB95800003 ER PT J AU MCCOY, PA AF MCCOY, PA TI REPRESENTATION OF HARMONIC-FUNCTIONS IN R4 SO JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS LA English DT Article RP MCCOY, PA (reprint author), USN ACAD,DEPT MATH,ANNAPOLIS,MD 21402, USA. NR 14 TC 0 Z9 0 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 JAN 1 PY 1991 VL 154 IS 1 BP 43 EP 54 DI 10.1016/0022-247X(91)90068-B PG 12 WC Mathematics, Applied; Mathematics SC Mathematics GA EV551 UT WOS:A1991EV55100005 ER PT J AU MCCOY, PA AF MCCOY, PA TI OPTIMAL APPROXIMATION AND GROWTH OF SOLUTIONS TO A CLASS OF ELLIPTIC PARTIAL-DIFFERENTIAL EQUATIONS SO JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS LA English DT Article RP MCCOY, PA (reprint author), USN ACAD,DEPT MATH,ANNAPOLIS,MD 21402, USA. NR 11 TC 0 Z9 0 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 JAN 1 PY 1991 VL 154 IS 1 BP 203 EP 211 DI 10.1016/0022-247X(91)90080-J PG 9 WC Mathematics, Applied; Mathematics SC Mathematics GA EV551 UT WOS:A1991EV55100017 ER PT J AU GILMAN, SC COLTON, JS GROSSMAN, Y AF GILMAN, SC COLTON, JS GROSSMAN, Y TI A-23187-STIMULATED CALCIUM-UPTAKE AND GABA RELEASE BY CEREBROCORTICAL SYNAPTOSOMES - EFFECTS OF HIGH-PRESSURE SO JOURNAL OF NEURAL TRANSMISSION-GENERAL SECTION LA English DT Article DE PRESSURE; A-23187; IONOPHORE; HPNS; GABA RELEASE ID GAMMA-AMINOBUTYRIC ACID; BRAIN SYNAPTOSOMES; STRIATAL SYNAPTOSOMES; GUINEA-PIG; TRANSPORT AB Guinea pig cerebrocortical synaptosome preparations were used to study the effect of compression to 62 ATA on Ca-45(2+) uptake and [H-3]GABA release using a calcium ionophore A 23187, which bypasses the voltage-sensitive calcium channel. Pressure was found to exert a suppressive effect on the A 23187-induced release of [H-3]GABA, while having no significant effect on A 23187-stimulated Ca-45(2+) uptake. On the other hand, both depolarization-induced Ca-45(2+) uptake and [H-3]GABA release were inhibited by pressure exposure. These results suggest that pressure may suppress GABA release by affecting pre-synaptic events subsequent to calcium influx. C1 USN, MED RES INST, DEPT DIVING MED, BETHESDA, MD 20814 USA. NR 22 TC 8 Z9 8 U1 0 U2 0 PU SPRINGER-VERLAG WIEN PI VIENNA PA SACHSENPLATZ 4-6, PO BOX 89, A-1201 VIENNA, AUSTRIA SN 0300-9564 J9 J NEURAL TRANSM-GEN JI J. Neural Transm.-Gen. Sect. PY 1991 VL 86 IS 1 BP 1 EP 9 DI 10.1007/BF01250371 PG 9 WC Neurosciences SC Neurosciences & Neurology GA GF920 UT WOS:A1991GF92000001 PM 1751025 ER PT J AU MAX, MD AF MAX, MD TI ARCTIC GEOLOGY AND PETROLEUM POTENTIAL - TROMSO, NORWAY SO JOURNAL OF PETROLEUM GEOLOGY LA English DT Editorial Material RP MAX, MD (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 3 PU SCIENTIFIC PRESS LTD PI BEACONSFIELD PA PO BOX 21, BEACONSFIELD, BUCKS, ENGLAND HP9 1NS SN 0141-6421 J9 J PETROL GEOL JI J. Pet. Geol. PD JAN PY 1991 VL 14 IS 1 BP 104 EP 105 DI 10.1111/j.1747-5457.1991.tb00303.x PG 2 WC Geosciences, Multidisciplinary SC Geology GA EQ285 UT WOS:A1991EQ28500014 ER PT J AU MITRA, S STARK, JP TATTI, SR AF MITRA, S STARK, JP TATTI, SR TI ON THE USE OF THE BOLTZMANN-MATANO ANALYSIS TO DEDUCE CONCENTRATION-DEPENDENT DIFFUSIVITY SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Note DE BOLTZMANN-MATANO ANALYSIS; CONCENTRATION-DEPENDENT DIFFUSIVITY; GAUSSIAN DISTRIBUTION; ION IMPLANTATION ID GAAS AB The Boltzmann-Matano (B-M) analysis has been widely used to extract a concentration-dependent diffusion coefficient to explain any deviations from the classical complementary error function of Gaussian diffusion profiles. Here we show that the use of this technique can be erroneous when applied to the case of implanted semiconductors, where diffusion lengths are small and the initial/boundary conditions cannot be applied to the implantation concentration profile in the direction of diffusion. C1 UNIV TEXAS,CTR MAT SCI,AUSTIN,TX 78712. RP MITRA, S (reprint author), USN,POSTGRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93943, USA. NR 6 TC 2 Z9 2 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-3697 J9 J PHYS CHEM SOLIDS JI J. Phys. Chem. Solids PY 1991 VL 52 IS 2 BP 463 EP 465 DI 10.1016/0022-3697(91)90100-E PG 3 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA FE626 UT WOS:A1991FE62600018 ER PT J AU HESS, DW SERENE, JW AF HESS, DW SERENE, JW TI SELF-CONSISTENT NUMERICAL-CALCULATIONS FOR NESTED FERMI LIQUIDS SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Article; Proceedings Paper CT WORKSHOP ON FERMIOLOGY OF HIGH-TC SUPERCONDUCTORS CY MAR 25-27, 1991 CL ARGONNE NATL LAB, ARGONNE, IL SP ARGONNE NATL LAB, UNIV CHICAGO HO ARGONNE NATL LAB ID HUBBARD-MODEL; STATE AB We have carried out propagator-renormalized numerical calculations for the self energy of the 2D Hubbard model generated self-consistently from the second-order skeleton diagram. We use lattices as large as 128 x 128 with 1024 Matsubara frequencies in order to obtain the the self energy at temperatures down to 0.002 times the bandwidth. Our results at and near half filling show marginal Fermi liquid behavior; for U approximately t the frequency dependence of the self energy is similar to that expected from the nested Fermi liquid theory of Virosztek and Ruvalds, but contrary to their model, the momentum dependence near the Fermi surface is strong. We also calculate the temperature dependence of the thermodynamic potential using the functional of Luttinger and Ward, and find significant departures from the T2 dependence expected for a normal Fermi liquid. For n less-than-or-equal-to 0.89, we see normal Fermi liquid behavior for temperatures below 1.5% of the bandwidth. RP HESS, DW (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. NR 8 TC 7 Z9 7 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-3697 J9 J PHYS CHEM SOLIDS JI J. Phys. Chem. Solids PY 1991 VL 52 IS 11-12 BP 1385 EP 1390 DI 10.1016/0022-3697(91)90115-G PG 6 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA GY553 UT WOS:A1991GY55300013 ER PT J AU BERKO, S SINGH, DJ VONSTETTEN, EC AF BERKO, S SINGH, DJ VONSTETTEN, EC TI POSITRON-ANNIHILATION IN HIGH CRITICAL-TEMPERATURE SUPERCONDUCTORS SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Article; Proceedings Paper CT WORKSHOP ON FERMIOLOGY OF HIGH-TC SUPERCONDUCTORS CY MAR 25-27, 1991 CL ARGONNE NATL LAB, ARGONNE, IL SP ARGONNE NATL LAB, UNIV CHICAGO HO ARGONNE NATL LAB DE CUPRATE SUPERCONDUCTORS; POSITRONS; FERMI SURFACE ID STATE ELECTRONIC-STRUCTURE; FERMI-SURFACE; MOMENTUM DENSITY; SINGLE-CRYSTALS; YBA2CU3O7; LIQUID; 20-K AB Two dimensional angular correlation of electron-positron annihilation radiation (2D ACAR) experiments are discussed in terms of calculated positron wavefunctions and ACAR spectra for high critical temperature superconductors. It is emphasized that positron wavefunction effects are larger in these materials than, for example, the previous class of A15 superconductors. Calculations indicate that the chain derived ridge section and the S centered hole pocket may be observable in YBa2Cu3O7, in agreement with recent experiments. The plane derived Fermi surfaces are expected to be extremely difficult to observe in this material. On the other hand, calculations show that positrons are a good probe of the Cu-O layers in Tl2Ba2CaCu2O3. C1 USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375. RP BERKO, S (reprint author), BRANDEIS UNIV,DEPT PHYS,WALTHAM,MA 02254, USA. RI Singh, David/I-2416-2012 NR 37 TC 7 Z9 7 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-3697 J9 J PHYS CHEM SOLIDS JI J. Phys. Chem. Solids PY 1991 VL 52 IS 11-12 BP 1485 EP 1491 DI 10.1016/0022-3697(91)90131-I PG 7 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA GY553 UT WOS:A1991GY55300029 ER PT J AU GRAHAM, AL ALTOBELLI, SA FUKUSHIMA, E MONDY, LA STEPHENS, TS AF GRAHAM, AL ALTOBELLI, SA FUKUSHIMA, E MONDY, LA STEPHENS, TS TI NMR IMAGING OF SHEAR-INDUCED DIFFUSION AND STRUCTURE IN CONCENTRATED SUSPENSIONS UNDERGOING COUETTE-FLOW SO JOURNAL OF RHEOLOGY LA English DT Note AB This note describes nuclear magnetic resonance (NMR) imaging of two concentrated suspensions undergoing flow between rotating concentric cylinders (wide-gap, annular Couette flow). Suspensions of both monodisperse (50% by volume) and bidisperse (60% by volume) spheres are studied. We find that particles migrate from the higher shear rate regions near the rotating inner cylinder to the lower shear rate regions near the stationary outer wall, establishing large concentration gradients after only a short time. In addition, the large particles in the bimodal suspension form concentric cylindrical sheets, parallel to the axis of the Couette device, which rotate relative to each other. In the Couette devices used in these studies, no significant axial migration of the particles is observed: the dispersion of particles is almost entirely in the radial direction. This particle migration and structure formation is believed responsible for torque reductions and other anomalous behavior witnessed during rheological testing of concentrated suspensions reported by Leighton and Acrivos (1987). C1 LOVELACE FDN MED EDUC & RES,ALBUQUERQUE,NM 87108. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. USN,CTR WEAP,CHINA LAKE,CA 93555. RP GRAHAM, AL (reprint author), UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545, USA. RI Stephens, Thomas/D-9512-2012 NR 8 TC 84 Z9 84 U1 0 U2 8 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0148-6055 J9 J RHEOL JI J. Rheol. PD JAN PY 1991 VL 35 IS 1 BP 191 EP 201 DI 10.1122/1.550227 PG 11 WC Mechanics SC Mechanics GA ER281 UT WOS:A1991ER28100011 ER PT J AU HOWARD, RM DUNN, AS AF HOWARD, RM DUNN, AS TI MISSILE LOADS AT HIGH ANGLES OF ATTACK SO JOURNAL OF SPACECRAFT AND ROCKETS LA English DT Note C1 USN,POSTGRAD SCH,WEAPONS ENGN,MONTEREY,CA 93943. RP HOWARD, RM (reprint author), USN,POSTGRAD SCH,DEPT AERONAUT & ASTRONAUT,MONTEREY,CA 93943, USA. NR 4 TC 4 Z9 4 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0022-4650 J9 J SPACECRAFT ROCKETS JI J. Spacecr. Rockets PD JAN-FEB PY 1991 VL 28 IS 1 BP 124 EP 125 PG 2 WC Engineering, Aerospace SC Engineering GA FH225 UT WOS:A1991FH22500019 ER PT J AU ALLMENDINGER, RW CHARLESWORTH, HAK ERSLEV, EA GUTH, P LANGENBERG, CW PECHER, A WHALLEY, JS AF ALLMENDINGER, RW CHARLESWORTH, HAK ERSLEV, EA GUTH, P LANGENBERG, CW PECHER, A WHALLEY, JS TI MICROCOMPUTER TECHNIQUES AND APPLICATIONS - MICROCOMPUTER SOFTWARE FOR STRUCTURAL GEOLOGISTS SO JOURNAL OF STRUCTURAL GEOLOGY LA English DT Note AB Many microcomputer programs allow efficient storage, manipulation and analysis of structural data. These programs can facilitate traditional analyses by accelerating time-consuming graphical and numerical methods as well as allowing new quantitative analytical procedures that would be either impossible or impractical without an easily accessible computer. Excellent programs exist that store and manage structural data, display and analyse orientations, analyse strain in brittle and ductile rocks, and model folded and faulted strata. The essential characteristics of the best of these programs are reviewed and guidelines for software selection suggested. C1 UNIV ALBERTA,DEPT GEOL,EDMONTON T6G 2E3,ALBERTA,CANADA. COLORADO STATE UNIV,DEPT EARTH RESOURCES,FT COLLINS,CO 80523. USN ACAD,DEPT OCEANOG,ANNAPOLIS,MD 21402. INST DOLOMIEU,F-38031 GRENOBLE,FRANCE. PORTSMOUTH POLYTECH,DEPT GEOL,PORTSMOUTH PO1 3QL,HANTS,ENGLAND. RP ALLMENDINGER, RW (reprint author), CORNELL UNIV,DEPT GEOL SCI,ITHACA,NY 14853, USA. RI Allmendinger, Richard/F-9334-2013 OI Allmendinger, Richard/0000-0001-8958-6113 NR 0 TC 6 Z9 6 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0191-8141 J9 J STRUCT GEOL JI J. Struct. Geol. PY 1991 VL 13 IS 9 BP 1079 EP 1083 DI 10.1016/0191-8141(91)90058-Q PG 5 WC Geosciences, Multidisciplinary SC Geology GA GJ151 UT WOS:A1991GJ15100009 ER PT J AU KUPERMAN, WA PORTER, MB PERKINS, JS EVANS, RB AF KUPERMAN, WA PORTER, MB PERKINS, JS EVANS, RB TI RAPID COMPUTATION OF ACOUSTIC FIELDS IN 3-DIMENSIONAL OCEAN ENVIRONMENTS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID NUMERICAL-METHOD; NORMAL-MODES; PROPAGATION; EQUATION; BOTTOM AB Adiabatic and coupled-mode theory is amenable to precalculations that can subsequently be used in a nonredundant manner to perform rapid three-dimensional acoustic field computations for a complex ocean environment. Algorithms have been developed to take advantage of both horizontal and vertical precalculated quantities. Complex three-dimensional field computations are then reduced to "spreadsheet" type manipulations of partial solutions to the wave equation. The method is illustrated by applying it to a Gulf Stream environment near the continental shelf. Results from adiabatic, coupled-mode, and parabolic-equation computations are compared. C1 SCI APPLICAT INT CORP,NEW LONDON,CT 06320. RP KUPERMAN, WA (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 17 TC 28 Z9 28 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 JAN PY 1991 VL 89 IS 1 BP 125 EP 133 DI 10.1121/1.400518 PG 9 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA ER162 UT WOS:A1991ER16200015 ER PT J AU BUCARO, JA HOUSTON, BH WILLIAMS, EG AF BUCARO, JA HOUSTON, BH WILLIAMS, EG TI FIBEROPTIC AIR-BACKED HYDROPHONE TRANSDUCTION MECHANISMS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Letter ID SENSORS AB It is predicted that, under certain conditions, the acoustic response of a thin-walled, tubular, air-backed fiber-optic hydrophone will exceed that predicted by the usual quasistatic approximations. Measurements of the acoustically induced optical phase shift for a fiber wound, thin-walled tube are presented to confirm the reasonableness of this prediction. RP BUCARO, JA (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 10 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 JAN PY 1991 VL 89 IS 1 BP 451 EP 453 DI 10.1121/1.400481 PG 3 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA ER162 UT WOS:A1991ER16200050 ER PT J AU MILLER, AR AF MILLER, AR TI REPRESENTATIONS FOR INCOMPLETE INTEGRALS OF CYLINDRICAL-FUNCTIONS SO JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS LA English DT Article ID K0 AB Incomplete Lipschitz-Hankel integrals are essentially indefinite integrals of products of Bessel or cylindrical functions, exponentials and powers. These integrals occur widely in pure and applied mathematics. The object of this paper is to give new representations for incomplete Lipschitz-Hankel integrals in terms of Kampe' de Feriet double hypergeometric functions. Thus earlier work of the author is unified to include certain representations for integrals of cylindrical functions other than Macdonald functions. In addition, certain properties of the Kampe' de Feriet functions associated with incomplete Lipschitz-Hankel integrals are given. RP MILLER, AR (reprint author), USN,RES LAB,DIV INFORMAT TECHNOL,WASHINGTON,DC 20375, USA. NR 8 TC 3 Z9 3 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0016-0032 J9 J FRANKLIN I JI J. Frankl. Inst.-Eng. Appl. Math. PY 1991 VL 328 IS 1 BP 163 EP 170 DI 10.1016/0016-0032(91)90012-R PG 8 WC Automation & Control Systems; Engineering, Multidisciplinary; Engineering, Electrical & Electronic; Mathematics, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Mathematics GA EP669 UT WOS:A1991EP66900012 ER PT J AU MILLER, AR MOSKOWITZ, IS AF MILLER, AR MOSKOWITZ, IS TI INCOMPLETE WEBER INTEGRALS OF CYLINDRICAL-FUNCTIONS SO JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS LA English DT Article AB Various representations for incomplete Weber integrals and related integrals are given in terms of Kampe de Feriet double hypergeometric functions; and some elementary properties of the Kampe de Feriet functions associated with these integrals are given. In addition, applications to a problem in search theory and the diffusion equation are provided. C1 USN,RES LAB,CTR SECURE INFORMAT TECHNOL,WASHINGTON,DC 20375. RP MILLER, AR (reprint author), USN,RES LAB,DIV INFORMAT TECHNOL,WASHINGTON,DC 20375, USA. NR 11 TC 6 Z9 6 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0016-0032 J9 J FRANKLIN I JI J. Frankl. Inst.-Eng. Appl. Math. PY 1991 VL 328 IS 4 BP 445 EP 457 DI 10.1016/0016-0032(91)90019-Y PG 13 WC Automation & Control Systems; Engineering, Multidisciplinary; Engineering, Electrical & Electronic; Mathematics, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Mathematics GA GB309 UT WOS:A1991GB30900006 ER PT J AU GORDON, WB BILOW, HJ AF GORDON, WB BILOW, HJ TI HIGH-FREQUENCY APPROXIMATIONS FOR EDGE SCATTER FROM SURFACES OF REVOLUTION SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION LA English DT Article AB We consider the radar backscatter from a truncated surface of revolution viewed at axial incidence and derive a closed-form high-frequency (HF) approximation for the physical-optics (PO) scattering integral. The PO predicted edge effect is extracted from this result and used to obtain a closed-form HF representation for the edge effect predicted by the geometrical theory of diffraction. The predictions for total radar backscatter thus obtained are compared with the results of some method-of-moment calculations (for paraboloids) and also with the older theoretical results of Raybin [IEEE Trans. Antennas Propag. AP-13, 754 (1965)] for spherical segments. RP GORDON, WB (reprint author), USN,RES LAB,DIV RADAR,CODE 5311,WASHINGTON,DC 20375, USA. NR 6 TC 4 Z9 4 U1 0 U2 0 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 JAN PY 1991 VL 8 IS 1 BP 11 EP 13 DI 10.1364/JOSAA.8.000011 PG 3 WC Optics SC Optics GA EQ746 UT WOS:A1991EQ74600002 ER PT J AU FELDMAN, U INDELICATO, P SUGAR, J AF FELDMAN, U INDELICATO, P SUGAR, J TI MAGNETIC DIPOLE LINE FROM U-LXXI GROUND-TERM LEVELS PREDICTED AT 3200-A SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID MULTICONFIGURATIONAL DIRAC-FOCK; FORBIDDEN LINES; TOKAMAK PLASMAS; 2-ELECTRON IONS AB Magnetic dipole (M1) lines above 2500 angstrom are convenient diagnostic tools for high-energy, low-density plasmas such as those of tokamaks. We found a sequence of such lines arising from transitions between two levels of the 3d4 5D ground term of titaniumlike ions. From Nd XXXIX to U LXXI the calculated wavelengths range from 3557 to 3200 angstrom with ionization energies of 2.7 to 8.2 keV. These lines have transition rates of 480 to 262 sec-1. The calculations were made with the multiconfiguration Dirac-Fock code of Desclaux. C1 NIST,GAITHERSBURG,MD 20899. RP FELDMAN, U (reprint author), USN,RES LAB,EO HULBERT CTR SPACE RES,WASHINGTON,DC 20375, USA. RI Indelicato, Paul/D-7636-2011 OI Indelicato, Paul/0000-0003-4668-8958 NR 14 TC 55 Z9 55 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD JAN PY 1991 VL 8 IS 1 BP 3 EP 5 DI 10.1364/JOSAB.8.000003 PG 3 WC Optics SC Optics GA EQ815 UT WOS:A1991EQ81500001 ER PT J AU RYAN, RL MALL, S AF RYAN, RL MALL, S TI CYCLIC HEATING OF A LAYERED PLATE WITH AN INTERFACE FLAW SO JOURNAL OF THERMAL STRESSES LA English DT Article AB The thermal cycling of a layered plate with a flaw, or crack, along an interface is considered. The stress intensities at the crack tips are obtained through the use of a singular integral equation formulation and a Gauss-Jacobi numerical scheme. Computations are carried out for a moderately wide range of frequencies and layer thickness-to-crack length ratios, and for various combinations of materials. RP RYAN, RL (reprint author), USN,RES LAB,DIV MAT SCI,WASHINGTON,DC 20375, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0149-5739 J9 J THERM STRESSES JI J. Therm. Stresses PY 1991 VL 14 IS 1 BP 33 EP 46 DI 10.1080/01495739108927049 PG 14 WC Thermodynamics; Mechanics SC Thermodynamics; Mechanics GA EZ824 UT WOS:A1991EZ82400003 ER PT J AU DILLICH, SA KANT, RA SARTWELL, BD SPRAGUE, JA SMIDT, FA AF DILLICH, SA KANT, RA SARTWELL, BD SPRAGUE, JA SMIDT, FA TI THE TRIBOLOGICAL BEHAVIOR OF TIN COATINGS PREPARED BY IBAD SO JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME LA English DT Article AB Ion Beam Assisted Deposition (IBAD) provides the ability to control the microstructure, and therefore the properties of thin films and coatings. This paper describes the tribological properties of TiN coatings prepared by reactive IBAD using evaporation of Ti from an electron beam evaporator in a 10(-3) to 10(-4) Pa partial pressure of nitrogen and simultaneous bombardment with a directed beam of 0.5 keV Ar+ ions. Films prepared with an Ar+ to Ti atom arrival rate ratio of 0.1 were found to be soft (Knoop hardness of [1000 with 5 gr load) while those prepared at an arrival rate ratio of 0.4 were hard (Knoop hardness of approximately 2000 at 5gr load). Transmission electron microscopy of the films showed the soft films had significant porosity at the grain boundaries while the hard films had almost none. All films were highly adherent. The wear life during pin on disk testing was a complex function of film hardness, ductility and debris formation. C1 US NAVAL RES LAB,WASHINGTON,DC 20375. NR 8 TC 9 Z9 9 U1 0 U2 3 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0742-4787 J9 J TRIBOL-T ASME JI J. Tribol.-Trans. ASME PD JAN PY 1991 VL 113 IS 1 BP 214 EP 219 DI 10.1115/1.2920592 PG 6 WC Engineering, Mechanical SC Engineering GA FE822 UT WOS:A1991FE82200030 ER PT J AU CLARIDGE, L AF CLARIDGE, L TI THE CONTOURS OF MASCULINE DESIRE - ROMANTICISM AND THE RISE OF WOMENS POETRY - ROSS,MB SO KEATS-SHELLEY JOURNAL LA English DT Book Review RP CLARIDGE, L (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU KEATS-SHELLEY ASSN AMER INC NEW YORK PUBLIC LIBRARY PI NEW YORK PA ROOM 226 FIFTH AVE-42ND ST, NEW YORK, NY 10018 SN 0453-4387 J9 KEATS-SHELLEY J JI Keats-Shelley J. PY 1991 VL 40 BP 172 EP 175 PG 4 WC Poetry SC Literature GA GW596 UT WOS:A1991GW59600013 ER PT J AU MARKOWITZ, M SINGH, A AF MARKOWITZ, M SINGH, A TI SELF-ASSEMBLING PROPERTIES OF 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOHYDROXYETHANOL - A HEADGROUP-MODIFIED DIACETYLENIC PHOSPHOLIPID SO LANGMUIR LA English DT Letter ID LIPID TUBULES; LIPOSOMES; MEMBRANE; BILAYER AB An acidic diacetylenic phospholipid, 1,2-bis(tricosa-10,12-diynoyl)-sn-glycero-3-phosphohydroxyethanol, has been prepared by exchanging choline functionality of corresponding phosphocholine with ethylene glycol by means of phospholipase D transphosphatidylation. The morphologies formed by this compound as aqueous dispersions in both the presence and absence of metal ions at pH 5.6 were directly observed by transmission electron micrograph. In the presence of mono- and bivalent cations, cylindrical microstructures were observed, whereas in the absence of cations, no definable microstructures were detected. Scanning electron microscopic analysis of the Ni-plated cylindrical microstructures showed that they were hollow. Monolayer studies of the phospholipid in the presence and absence of metal ions indicate that differences in headgroup packing and acyl chain alignment between the charged and neutralized lipid are responsible for the observed morphologies. C1 USN,RES LAB,CTR BIO MOLEC SCI & ENGN,CODE 6090,WASHINGTON,DC 20375. NR 17 TC 35 Z9 35 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD JAN PY 1991 VL 7 IS 1 BP 16 EP 18 DI 10.1021/la00049a005 PG 3 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA EU030 UT WOS:A1991EU03000005 ER PT J AU GOLD, SR CHAFFOO, RAK AF GOLD, SR CHAFFOO, RAK TI FAT MYRINGOPLASTY IN THE GUINEA-PIG SO LARYNGOSCOPE LA English DT Article ID TYMPANIC MEMBRANE; REPLACEMENT MEMBRANE; PERFORATION AB Fat myringoplasty is a simple office technique for repairing tympanic membrane perforations. It involves wedging a piece of fat from the ear lobule into the perforation. A search of the literature failed to reveal any controlled studies on the efficacy of this method, which may allow patients to avoid more invasive procedures. Controlled perforations in guinea pig tympanic membranes were treated with fat myringoplasties, paper patches, or no intervention. Four weeks following the procedures, ears were examined and photographed under the microscope and studied histologically. The fat myringoplasty healing rate exceeded the rates of both the control and paper-patch groups. Results were stratified with respect to location and size of perforations. The results and histological studies suggest that controlled studies in humans are warranted. C1 USN HOSP,DEPT OTOLARYNGOL,SAN DIEGO,CA 92134. USN HOSP,DEPT CLIN INVEST,SAN DIEGO,CA 92134. NR 10 TC 11 Z9 13 U1 0 U2 0 PU LARYNGOSCOPE CO PI ST LOUIS PA 10 S BROADWAY 14TH FLOOR, ST LOUIS, MO 63102-1741 SN 0023-852X J9 LARYNGOSCOPE JI Laryngoscope PD JAN PY 1991 VL 101 IS 1 BP 1 EP 5 PN 1 PG 5 WC Medicine, Research & Experimental; Otorhinolaryngology SC Research & Experimental Medicine; Otorhinolaryngology GA EP945 UT WOS:A1991EP94500001 PM 1984545 ER PT J AU STAMPER, JA AF STAMPER, JA TI REVIEW ON SPONTANEOUS MAGNETIC-FIELDS IN LASER-PRODUCED PLASMAS - PHENOMENA AND MEASUREMENTS SO LASER AND PARTICLE BEAMS LA English DT Review ID IRRADIATED SPHERICAL TARGETS; RAYLEIGH-TAYLOR INSTABILITY; INDUCED SURFACE TRANSPORT; RESONANCE-ABSORPTION; PRESSURE-DEPENDENCE; THERMAL-INSTABILITY; PONDEROMOTIVE FORCE; ENERGY DEPOSITION; FARADAY-ROTATION; GENERATION AB Large (megagauss) "spontaneous" magnetic fields are produced by laser-plasma interactions when a short, powerful laser pulse is focused to a small diameter onto a solid target. The relevance of these magnetic fields to inertial confinement fusion applications depends on the numerous ways in which they can affect laser-plasma interactions and the resulting plasma. Theoretical studies have dealt with a variety (thermal, radiative, and dynamo) of generation mechanisms and with the associated transport and instability phenomena. The fields, originally observed with small induction probes placed near the target, have been studied in the focal region by optical methods. These optical diagnostics have used Faraday rotation of a probing laser beam and Zeeman profiles of emitted spectral lines. RP STAMPER, JA (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 101 TC 128 Z9 135 U1 3 U2 22 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0263-0346 J9 LASER PART BEAMS JI Laser Part. Beams PY 1991 VL 9 IS 4 BP 841 EP 862 PG 22 WC Physics, Applied SC Physics GA GP965 UT WOS:A1991GP96500006 ER PT J AU GORDON, DF AF GORDON, DF TI IMPROVING THE COMPREHENSIBILITY, ACCURACY, AND GENERALITY OF REACTIVE PLANS SO LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Article AB This paper describes a method for improving the comprehensibility, accuracy, and generality of reactive plans. A reactive plan is a set of reactive rules. Our method involves two phases: (1) formulate explanations of execution traces, and (2) generate new reactive rules from the explanations. The explanation phase involves translating the execution trace of a reactive planner into an abstract language, and then using Explanation Based Learning to identify general strategies within the abstract trace. The rule generation phase consists of taking a subset of the explanations and using these explanations to generate a set of new reactive rules to add to the original set for the purpose of performance improvement. RP GORDON, DF (reprint author), USN,RES LAB,NAVY CTR APPL RES AI,CODE 5510,WASHINGTON,DC 20375, USA. NR 13 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 J9 LECT NOTES ARTIF INT JI Lect. Notes Artif. Intell. PY 1991 VL 542 BP 358 EP 367 PG 10 WC Computer Science, Artificial Intelligence SC Computer Science GA KV083 UT WOS:A1991KV08300037 ER PT J AU SPEARS, WM ANAND, V AF SPEARS, WM ANAND, V TI A STUDY OF CROSSOVER OPERATORS IN GENETIC PROGRAMMING SO LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Article AB Holland's analysis of the sources of power of genetic algorithms has served as guidance for the applications of genetic algorithms for more than 15 years. The technique of applying a recombination operator (crossover) to a population of individuals is a key to that power. Neverless, there have been a number of contradictory results concerning crossover operators with respect to overall performance. Recently, for example, genetic algorithms were used to design neural network modules and their control circuits. In these studies, a genetic algorithm without crossover outperformed a genetic algorithm with crossover. This report re-examines these studies, and concludes that the results were caused by a small population size. New results are presented that illustrate the effectiveness of crossover when the population size is larger. From a performance view, the results indicate that better neural networks can be evolved in a shorter time if the genetic algorithm uses crossover. C1 MIT,CAMBRIDGE,MA 02139. RP SPEARS, WM (reprint author), USN,RES LAB,NAVY CTR APPL RES AI,CODE 5510,WASHINGTON,DC 20375, USA. NR 8 TC 7 Z9 7 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 J9 LECT NOTES ARTIF INT JI Lect. Notes Artif. Intell. PY 1991 VL 542 BP 409 EP 418 PG 10 WC Computer Science, Artificial Intelligence SC Computer Science GA KV083 UT WOS:A1991KV08300042 ER PT J AU BERZINS, V AF BERZINS, V TI SOFTWARE MERGE - MODELS AND METHODS FOR COMBINING CHANGES TO PROGRAMS SO LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article DE SOFTWARE MERGING; CONFIGURATION MANAGEMENT; MAINTENANCE AB We outline a model for programs and data, and present a formal definition of an ideal change merging operation. This model is used to develop a new semantically based method for combining changes to programs. We also evaluate the appropriateness of the change merging operation, and examine some circumstances where the specifications of a program as well as the implementations can be used to guide the change merging process in cases where the implementations conflict but the specifications do not. RP BERZINS, V (reprint author), USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943, USA. NR 16 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0302-9743 J9 LECT NOTES COMPUT SC JI Lect. Notes Comput. Sci. PY 1991 VL 550 BP 229 EP 250 PG 22 WC Computer Science, Theory & Methods SC Computer Science GA KQ177 UT WOS:A1991KQ17700013 ER PT J AU DEJONG, KA SPEARS, WM AF DEJONG, KA SPEARS, WM TI AN ANALYSIS OF THE INTERACTING ROLES OF POPULATION-SIZE AND CROSSOVER IN GENETIC ALGORITHMS SO LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article AB In this paper we present some theoretical and empirical results on the interacting roles of population size and crossover in genetic algorithms. We summarize recent theoretical results on the disruptive effect of two forms of multi-point crossover: n-point crossover and uniform crossover. We then show empirically that disruption analysis alone is not sufficient for selecting appropriate forms of crossover. However, by taking into account the interacting effects of population size and crossover, a general picture begins to emerge. The implications of these results on implementation issues and performance are discussed, and several directions for further research are suggested. C1 USN, RES LAB, AI CTR, WASHINGTON, DC 20375 USA. RP DEJONG, KA (reprint author), GEORGE MASON UNIV, DEPT COMP SCI, FAIRFAX, VA 22030 USA. NR 8 TC 10 Z9 10 U1 0 U2 2 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0302-9743 J9 LECT NOTES COMPUT SC JI Lect. Notes Comput. Sci. PY 1991 VL 496 BP 38 EP 47 PG 10 WC Computer Science, Theory & Methods SC Computer Science GA GA062 UT WOS:A1991GA06200007 ER PT J AU WHITEHOUSE, HJ BOASHASH, B SPEISER, JM AF WHITEHOUSE, HJ BOASHASH, B SPEISER, JM TI HIGH-RESOLUTION PROCESSING TECHNIQUES FOR TEMPORAL AND SPATIAL SIGNALS SO LECTURE NOTES IN CONTROL AND INFORMATION SCIENCES LA English DT Article ID SINGULAR VALUE DECOMPOSITION; DOPPLER RADAR; COHERENT; MODEL C1 UNIV QUEENSLAND,CRISSP,ST LUCIA,QLD 4067,AUSTRALIA. RP WHITEHOUSE, HJ (reprint author), USN,SAN DIEGO,CA 92152, USA. RI Boashash, Boualem/A-9687-2010 OI Boashash, Boualem/0000-0002-2404-9103 NR 81 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-8643 J9 LECT NOTES CONTR INF JI Lect. Notes Control Inf. Sci. PY 1991 VL 155 BP 129 EP 176 PG 48 WC Automation & Control Systems; Computer Science, Information Systems SC Automation & Control Systems; Computer Science GA FW932 UT WOS:A1991FW93200005 ER PT J AU SCHNARE, RE AF SCHNARE, RE TI PROCUREMENT FOR BOOKS AND LIBRARY-MATERIALS IN THE FEDERAL-GOVERNMENT WITH THE USE OF APPROPRIATED FUNDS - OH LET ME COUNT THE WAYS SO LIBRARY ACQUISITIONS-PRACTICE AND THEORY LA English DT Article RP SCHNARE, RE (reprint author), USN,COLL WAR,NEWPORT,RI 02841, USA. NR 0 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 0364-6408 J9 LIBR ACQUIS PRACT TH JI Libr. Acquis.-Pract. Theory PY 1991 VL 15 IS 2 BP 239 EP 243 DI 10.1016/0364-6408(91)90061-I PG 5 WC Information Science & Library Science SC Information Science & Library Science GA FD952 UT WOS:A1991FD95200013 ER PT B AU COBB, HG GREFENSTETTE, JJ AF COBB, HG GREFENSTETTE, JJ BE Birnbaum, LA Collins, GC TI LEARNING THE PERSISTENCE OF ACTIONS IN REACTIVE CONTROL RULES SO MACHINE LEARNING: PROCEEDINGS OF THE EIGHTH INTERNATIONAL WORKSHOP (ML91) LA English DT Proceedings Paper CT 8th International Workshop on Machine Learning (ML91) CY JUN, 1991 CL NORTHWESTERN UNIV, EVANSTON, IL SP NORTHWESTERN UNIV, USN, OFF NAVAL RES HO NORTHWESTERN UNIV C1 USN,RES LAB,CTR APPL RES ARTIFICIAL INTELLIGENCE,WASHINGTON,DC 20375. NR 0 TC 1 Z9 1 U1 0 U2 0 PU MORGAN KAUFMANN PUB INC PI SAN MATEO PA 2929 CAMPUS DRIVE, SAN MATEO, CA 94403 BN 1-55860-200-3 PY 1991 BP 293 EP 297 PG 5 WC Computer Science, Artificial Intelligence SC Computer Science GA BA74J UT WOS:A1991BA74J00056 ER PT B AU GORDON, DF AF GORDON, DF BE Birnbaum, LA Collins, GC TI AN ENHANCER FOR REACTIVE PLANS SO MACHINE LEARNING: PROCEEDINGS OF THE EIGHTH INTERNATIONAL WORKSHOP (ML91) LA English DT Proceedings Paper CT 8th International Workshop on Machine Learning (ML91) CY JUN, 1991 CL NORTHWESTERN UNIV, EVANSTON, IL SP NORTHWESTERN UNIV, USN, OFF NAVAL RES HO NORTHWESTERN UNIV C1 USN,RES LAB,CTR APPL RES ARTIFICIAL INTELLIGENCE,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MORGAN KAUFMANN PUB INC PI SAN MATEO PA 2929 CAMPUS DRIVE, SAN MATEO, CA 94403 BN 1-55860-200-3 PY 1991 BP 505 EP 508 PG 4 WC Computer Science, Artificial Intelligence SC Computer Science GA BA74J UT WOS:A1991BA74J00098 ER PT J AU SALAZAR, MH SALAZAR, SM AF SALAZAR, MH SALAZAR, SM TI ASSESSING SITE-SPECIFIC EFFECTS OF TBT CONTAMINATION WITH MUSSEL GROWTH-RATES SO MARINE ENVIRONMENTAL RESEARCH LA English DT Article ID MYTILUS-EDULIS; UNITED-STATES; TRIBUTYLTIN; WATCH; BIVALVES; ACCUMULATION; EXPOSURE; PROGRAM; OXIDE; BAY AB During nine field transplant tests in San Diego Bay (1987-1990), juvenile mussels were exposed to mean concentrations of tributyltin (TBT) in ambient seawater ranging from 2 to 530 ng liter-1 for 12 weeks under natural conditions. A total of 79 cages with 18 mussels each were monitored at 18 different sites. Growth and seawater TBT concentrations were measured weekly or on alternate weeks (biweekly). Mean growth rates ranged from 17 to 505 mg week-1 (0.2 to 2.5 mm week-1). Accumulation of TBT in mussel tissues was measured at the end of each 12-week test exposure and ranged from 0.1 to 3.2-mu-g g-1 TBT wet weight. The frequency of the measurements and the integration of chemical and biological measurements improved the accuracy of the assessment over more traditional approaches. Growth was significantly related to seawater and tissue TBT. The statistical relationships with growth effects were used to estimate chemical effect zones for TBT in San Diego Bay. Site-specific differences were distinguished by additional statistical analyses and consideration of environmental significance. C1 USN,CTR OCEAN SYST,SAN DIEGO,CA 92152. NR 41 TC 65 Z9 69 U1 2 U2 6 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0141-1136 J9 MAR ENVIRON RES JI Mar. Environ. Res. PY 1991 VL 32 IS 1-4 BP 131 EP 150 DI 10.1016/0141-1136(91)90038-A PG 20 WC Environmental Sciences; Marine & Freshwater Biology; Toxicology SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Toxicology GA GX305 UT WOS:A1991GX30500011 ER PT J AU VALKIRS, AO DAVIDSON, B KEAR, LL FRANSHAM, RL GROVHOUG, JG SELIGMAN, PF AF VALKIRS, AO DAVIDSON, B KEAR, LL FRANSHAM, RL GROVHOUG, JG SELIGMAN, PF TI LONG-TERM MONITORING OF TRIBUTYLTIN IN SAN-DIEGO BAY CALIFORNIA SO MARINE ENVIRONMENTAL RESEARCH LA English DT Article ID HYDRIDE AB Tributyltin (TBT) surface water concentrations have significantly decreased in San Diego Bay following legislative restrictions on use of anti-fouling paints containing TBT in California. Current surface water concentrations in three of four regions studied in San Diego Bay are below the 6 ng liter-1 water quality criteria concentration adopted by the State of California for the protection of marine species. Regression analysis of surface water TBT measurements made over a 2 year period indicated that present concentrations would decrease by 50% in 8 months to approximately 2 years depending on the region studied. Tissue samples from the bay mussel, Mytilus edulis indicated that TBT measured in tissues generally decreased as water concentrations decreased. The majority of TBT concentrations measured in tissue samples were below levels reported to adversely affect mussel growth. Sediment TBT concentrations in San Diego Bay generally did not reflect recent decreases in water column values and were variable among stations over time. C1 USN,CTR OCEAN SYST,SAN DIEGO,CA 92152. RP VALKIRS, AO (reprint author), COMP SCI CORP,SAN DIEGO,CA 92110, USA. NR 24 TC 41 Z9 42 U1 0 U2 6 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0141-1136 J9 MAR ENVIRON RES JI Mar. Environ. Res. PY 1991 VL 32 IS 1-4 BP 151 EP 167 DI 10.1016/0141-1136(91)90039-B PG 17 WC Environmental Sciences; Marine & Freshwater Biology; Toxicology SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Toxicology GA GX305 UT WOS:A1991GX30500012 ER PT J AU HEMPEL, P SCHREIBER, R JOHNSON, L THIEDE, J AF HEMPEL, P SCHREIBER, R JOHNSON, L THIEDE, J TI THE VESTERISBANKEN SEAMOUNT (GREENLAND BASIN) - PATTERNS OF MORPHOLOGY AND SEDIMENT DISTRIBUTION SO MARINE GEOLOGY LA English DT Letter ID MANTLE PLUME; CONVECTION; PETROLOGY; BASALTS; ICELAND; SEA AB A closely spaced grid of seismic reflection profiles has permitted a description of the structure of the Vesterisbanken Seamount (Greenland Sea) and the distribution of the surrounding sediments. This isolated seamount is situated at 73-degrees-30'N, 9-degrees-10'W in the Greenland Basin and rises from the basin floor at a water depth of about 3100 m to approximately 130 m below sea level; the maximum inclination of its slope is 26-degrees. It is of basaltic origin, and reveals chaotic reflectors on the seismic profiles. No inhomogeneities are visible within the volcanic rocks of Vesterisbanken and the basement complex surrounding it. Dredge samples from the summit of Vesterisbanken reveal an age of approximately 100,000 years. In the seismic records, there was no sediment cover discernable on top of or on the flanks of the seamount. At the base of Vesterisbanken, the seismic reflection characteristics suggest an alternation of sediments and basaltic rocks, the latter probably being the result of young lava flows. In some places the volcanic rocks disturb the sedimentary sequence to such a high degree, that the stratification is virtually eliminated. Volcanic activity also occurs in the vicinity of the seamount: for example, about 20 km northwest of Vesterisbanken an intrusion has pierced through 1000 m of sediment, almost reaching the seafloor. The sediment thickness is variable and it smooths the irregular basement topography. In addition, the sediment is characterized by local unconformities associated with onlap structures. C1 KRUPP ATLAS ELEKTR GMBH,W-2800 BREMEN 44,GERMANY. USN,OFF NAVAL RES,ARLINGTON,VA 22217. RP HEMPEL, P (reprint author), GEOMAR,FORSCHUNGSZENTRUM MARINE GEOWISSENSCH,WISCHHOFSTR 1-3,W-2300 KIEL 14,GERMANY. RI Thiede, Jorn/J-5313-2013 OI Thiede, Jorn/0000-0002-3452-2208 NR 27 TC 8 Z9 8 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0025-3227 J9 MAR GEOL JI Mar. Geol. PD JAN PY 1991 VL 96 IS 1-2 BP 175 EP 185 DI 10.1016/0025-3227(91)90215-P PG 11 WC Geosciences, Multidisciplinary; Oceanography SC Geology; Oceanography GA FB211 UT WOS:A1991FB21100018 ER PT J AU SHOEMAKER, PA RIDGWAY, SH AF SHOEMAKER, PA RIDGWAY, SH TI CUTANEOUS RIDGES IN ODONTOCETES SO MARINE MAMMAL SCIENCE LA English DT Article DE ODONTOCETE SKIN; CUTANEOUS RIDGES; SURFACE RIDGES; DERMAL RIDGES; TACTILE SENSING; HYDRODYNAMICS AB Cutaneous ridges are present at the surface of the skin in many odontocetes, and although often quite faint, may be observed with the naked eye. We have taken surface impressions and measured the ridges of individuals of seven odonotocete species, and observed cutaneous ridges on three additional species. In the delphinids and the one Physeter neonate studied, spatial periods of the ridges varied from 0.4 mm-1.7 mm and trough-to-peak heights from less than 10-mu-m to about 60-mu-m. Two Delphinapterus (monodontids) had ridges significantly larger than the Physeter and most delphinids, with spatial periods of 1.9-2.4 mm and heights 80-120-mu-m. We found the ridges distributed over much of the surface of the body, but relatively faint or absent on most of the head, the control surfaces, and the ventral region in some species. In all of the animals we observed, the ridges ran in an approximately circumferential direction around the body trunk rostral to the dorsal fin or mid-body area, but varied somewhat in direction in the caudal region and in other isolated areas. While the function of the cutaneous ridges has not been established, we speculate that they may play some role in tactile sensing, in the hydrodynamic characteristics of an animal, or both. RP SHOEMAKER, PA (reprint author), USN,CTR OCEAN SYST,SAN DIEGO,CA 92152, USA. NR 16 TC 8 Z9 8 U1 0 U2 4 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 JAN PY 1991 VL 7 IS 1 BP 66 EP 74 DI 10.1111/j.1748-7692.1991.tb00551.x PG 9 WC Marine & Freshwater Biology; Zoology SC Marine & Freshwater Biology; Zoology GA EX930 UT WOS:A1991EX93000006 ER PT J AU DENNY, SB HUBBLE, EN AF DENNY, SB HUBBLE, EN TI PREDICTION OF CRAFT TURNING CHARACTERISTICS SO MARINE TECHNOLOGY AND SNAME NEWS LA English DT Article AB A procedure is presented for predicting steady turning radius and turning rate of planing and displacement craft equipped with conventional propeller and rudder arrangements. The procedure enables prediction of turning characteristics for various rudder angles and approach speeds. Predictions of steady turning radii are compared with actual trial data for craft up to 110 ft in length. General graphs are presented which can be used by designers and craft operators to estimate approximate steady turning radius and turn rate when a minimum of craft information is available. RP DENNY, SB (reprint author), USN,SEA COMBAT SYST ENGN STN,NORFOLK,VA 23511, USA. NR 0 TC 6 Z9 6 U1 0 U2 2 PU SOC NAVAL ARCH MARINE ENG PI JERSEY CITY PA 601 PAVONIA AVENUE, JERSEY CITY, NJ 07306 SN 0025-3316 J9 MAR TECHNOL SNAME N JI Mar. Technol. Sname News PD JAN PY 1991 VL 28 IS 1 BP 1 EP 13 PG 13 WC Engineering, Ocean; Oceanography SC Engineering; Oceanography GA ET986 UT WOS:A1991ET98600002 ER PT J AU DEVRIES, RL AF DEVRIES, RL TI PRODUCIBILITY BENEFITS OF THE SWATH CONFIGURATION SO MARINE TECHNOLOGY AND SNAME NEWS LA English DT Article AB Producibility is the term used in shipyards to describe the relative efficiency of constructing one design over another. The producibility of a ship is primarily a function of the ship's configuration. The "box-like" structure of the small waterplane area, twin hull (SWATH) enhances the design flexibility in both the spatial arrangement of the compartments and the outfit arrangement within each compartment. One of the major benefits of the SWATH design is the expected dramatic increase in the number and size of distributive system outfit packages. The location of the major equipment (such as the gas turbine, main propulsion generators and the diesel ship service generators) high and in the center of the upper structure on the SWATH increases the time available to assemble complete outfit packages. The SWATH structural configuration has few complex shapes or intersections, as the majority of the structure is rectilinear and the underwater hulls are composed of simple cones and cylinders. Further, the homogeneity of the SWATH structure results in repeating design details generally throughout the length of the ship with port and starboard mirror image structure. Thus, it is possible to achieve significant cost savings in every area of design and construction. Properly designed, the SWATH configuration can be the most cost-effective platform available for today's low to medium payload ships. RP DEVRIES, RL (reprint author), USN,BATH IRON WORKS,BATH,ME 04530, 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 0025-3316 J9 MAR TECHNOL SNAME N JI Mar. Technol. Sname News PD JAN PY 1991 VL 28 IS 1 BP 23 EP 29 PG 7 WC Engineering, Ocean; Oceanography SC Engineering; Oceanography GA ET986 UT WOS:A1991ET98600004 ER PT B AU SHIRK, JS LINDLE, JR BARTOLI, FJ KAFAFI, ZH SNOW, AW AF SHIRK, JS LINDLE, JR BARTOLI, FJ KAFAFI, ZH SNOW, AW BE MARDER, SR SOHN, JE STUCKY, GD TI NONLINEAR OPTICAL-PROPERTIES OF SUBSTITUTED PHTHALOCYANINES SO MATERIALS FOR NONLINEAR OPTICS: CHEMICAL PERSPECTIVES SE ACS SYMPOSIUM SERIES LA English DT Proceedings Paper CT SYMP AT THE 199TH NATIONAL MEETING OF THE AMERICAN CHEMICAL SOC - MATERIALS FOR NONLINEAR OPTICS : CHEMICAL PERSPECTIVES CY APR 22-27, 1990 CL BOSTON, MA SP AMER CHEM SOC, DIV ORG CHEM, AMER CHEM SOC, DIV INORG CHEM, USAF, OFF SCI RES, PETR RES FUND, AT&T BELL LAB, DUPONT CO, EASTMAN KODAK, USN, OFF NAVAL RES, STRATEG DEF INITIAT ORG, INNOVAT SCI & TECHNOL OFF ID MOLECULAR ASSOCIATION; MONOLAYER FORMATION; PHASE CONJUGATION RP SHIRK, JS (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Lindle, James/A-9426-2009 NR 0 TC 22 Z9 22 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA WASHINGTON BN 0-8412-1939-7 J9 ACS SYM SER PY 1991 VL 455 BP 626 EP 634 PG 9 WC Chemistry, Organic; Materials Science, Multidisciplinary; Optics; Physics, Applied; Polymer Science SC Chemistry; Materials Science; Optics; Physics; Polymer Science GA BT21Q UT WOS:A1991BT21Q00042 ER PT J AU INGBER, L FUJIO, H WEHNER, MF AF INGBER, L FUJIO, H WEHNER, MF TI MATHEMATICAL COMPARISON OF COMBAT COMPUTER-MODELS TO EXERCISE DATA SO MATHEMATICAL AND COMPUTER MODELLING LA English DT Article ID FOKKER-PLANCK EQUATIONS; PATH-INTEGRAL SOLUTIONS; TERM-MEMORY CAPACITY; TIME-SERIES MODEL; NEOCORTICAL INTERACTIONS; STATISTICAL-MECHANICS; NUMERICAL EVALUATION; RIEMANNIAN CONTRIBUTIONS; SYSTEMS; EQUILIBRIUM AB The powerful techniques of modern nonlinear statistical mechanics are used to compare battalion scale combat computer models (including simulations and wargames) to exercise data. This is necessary if large-scale combat computer models are to be extrapolated with confidence to develop battle-management, C3 and procurement decision-aids, and to improve training. This modeling approach to battalion level missions is amenable to reasonable algebraic and/or heuristic approximations to drive higher-echelon computer models. Each data set is fit to several candidate short-time probability distributions, using methods of "very fast simulated re-annealing" with a Lagrangian (time-dependent algebraic cost-function) derived from nonlinear stochastic rate equations. These candidate mathematical models are further tested by using path-integral numerical techniques we have developed to calculate long-time probability distribution spanning the combat scenario. We have demonstrated proofs of principle, that battalion level combat exercises can be well represented by the computer simulation JANUS(T), and that modern methods of nonlinear nonequilibrium statistical mechanics can well model these systems. Since only relatively simple drifts and diffusions were required, in larger systems, e.g., at brigade and division levels, it might be possible to "absorb" other important variables (C3, human factors, logistics, etc.) into more nonlinear mathematical forms. Otherwise, this battalion level model should be supplemented with a "tree" of branches corresponding to estimated values of these variables. C1 USN,POSTGRAD SCH,TRADOC ANAL COMMAND,MONTEREY,CA 93940. USN,POSTGRAD SCH,DEPT PHYS,MONTEREY,CA 93940. UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RI Ingber, Lester/G-6087-2010 OI Ingber, Lester/0000-0003-1502-3910 NR 67 TC 26 Z9 26 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0895-7177 J9 MATH COMPUT MODEL JI Math. Comput. Model. PY 1991 VL 15 IS 1 BP 65 EP 90 DI 10.1016/0895-7177(91)90017-2 PG 26 WC Computer Science, Interdisciplinary Applications; Computer Science, Software Engineering; Mathematics, Applied SC Computer Science; Mathematics GA FE675 UT WOS:A1991FE67500007 ER PT J AU FARGUES, MP BEEX, AAL AF FARGUES, MP BEEX, AAL TI FAST ORDER-RECURSIVE GENERALIZED HERMITIAN TOEPLITZ EIGENSPACE DECOMPOSITION SO MATHEMATICS OF CONTROL SIGNALS AND SYSTEMS LA English DT Article DE EIGENDECOMPOSITION; PARALLEL ALGORITHM; ARRAY PROCESSING; COLORED NOISE ID EIGENVALUE AB We present a parallel algorithm which computes recursively, in increasing order, the complete generalized eigendecompositions of the successive subpencils contained in a maximum size Hermitian Toeplitz generalized eigenproblem. At each order a number of independent, structurally identical, nonlinear problems are solved in parallel, facilitating fast implementation. The multiple and clustered minimum eigenvalue cases are treated in detail. In the application of our algorithm to narrowband array processing in colored noise, the direction-of-arrival containing eigenspace information is provided recursively in order. This permits estimation of the angles of arrival for subsequent orders, facilitating early estimation of the number of sources as well as verification of results obtained at previous orders. C1 VIRGINIA POLYTECH INST & STATE UNIV,BRADLEY DEPT ELECT ENGN,BLACKSBURG,VA 24061. USN,ELECT & COMP ENGN POSTGRAD SCH,MONTEREY,CA 93940. NR 15 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL ROAD, GODALMING, SURREY, ENGLAND GU7 3DJ SN 0932-4194 J9 MATH CONTROL SIGNAL JI Math. Control Signal Syst. PY 1991 VL 4 IS 1 BP 99 EP 117 DI 10.1007/BF02551383 PG 19 WC Automation & Control Systems; Engineering, Electrical & Electronic; Mathematics, Interdisciplinary Applications SC Automation & Control Systems; Engineering; Mathematics GA EP637 UT WOS:A1991EP63700007 ER PT J AU FRYAUFF, DJ HANAFI, HA BAILLY, C SAIDSALAH, EA MOUSSA, M AF FRYAUFF, DJ HANAFI, HA BAILLY, C SAIDSALAH, EA MOUSSA, M TI PHLEBOTOMINE SANDFLIES OF DJIBOUTI - RECENT SURVEYS SO MEDICAL AND VETERINARY ENTOMOLOGY LA English DT Note DE DJIBOUTI; SANDFLIES; LEISHMANIASIS RP FRYAUFF, DJ (reprint author), USN,DIV MED ZOOL,MED RES UNIT 3,NEW YORK,NY 09527, USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0269-283X J9 MED VET ENTOMOL JI Med. Vet. Entomol. PD JAN PY 1991 VL 5 IS 1 BP 131 EP 133 DI 10.1111/j.1365-2915.1991.tb00531.x PG 3 WC Entomology; Veterinary Sciences SC Entomology; Veterinary Sciences GA EZ658 UT WOS:A1991EZ65800019 PM 1768893 ER PT J AU RICKER, RE FINK, JL VASUDEVAN, AK AF RICKER, RE FINK, JL VASUDEVAN, AK TI ON THE STRESS-CORROSION CRACKING OF AL-LI ALLOYS - THE ROLE OF GRAIN-BOUNDARY PRECIPITATES SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Note ID ALUMINUM-ALLOYS; FRACTURE C1 USN,OFF RES,DIV DEF SCI,ARLINGTON,VA 22217. RP RICKER, RE (reprint author), NATL INST STAND & TECHNOL,MAT SCI & ENGN LAB,DIV MET,CORROS GRP,GAITHERSBURG,MD 20899, USA. RI Ricker, Richard/H-4880-2011 OI Ricker, Richard/0000-0002-2871-4908 NR 12 TC 9 Z9 9 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 JAN PY 1991 VL 22 IS 1 BP 264 EP 267 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA EX126 UT WOS:A1991EX12600029 ER PT J AU ANDERSON, RV BAILEY, JC AF ANDERSON, RV BAILEY, JC TI ERRORS IN THE GERDIEN MEASUREMENT OF ATMOSPHERIC ELECTRIC-CONDUCTIVITY SO METEOROLOGY AND ATMOSPHERIC PHYSICS LA English DT Article AB The measurement of conductivity has been an essential part of most atmospheric electricity research programs during the past century. This measurement is known to be vulnerable to a variety of potentially significant errors which can be separated into those resulting from diffusion of ions and those produced by electrical forces. Diffusion errors are caused by inlet tubing, screens, and inlet covers; and electrically produced errors may result from the effect of the accelerating potential or the potential of the apparatus itself. Detection and quantification of these errors has been the subject of several past studies which are discussed in detail. In this paper, a series of measurements and theoretical analyses is described in which the effects of each error mechanism are isolated, measured, and analyzed, and in which prior error reduction schemes are tested. It is shown that diffusive losses in inlet ducting and structures can be significant, and analytical estimations of these losses are presented which agree well with the measurements. The losses produced by electrical forces may also be significant even when plausible ameliorative measures are taken, and operating constraints to avoid this error source are developed. Past measurements of diffusive loss are found to be consistent with these results except in one case where improper operating conditions are indicated. C1 USN,RES LAB,WASHINGTON,DC 20375. NR 30 TC 13 Z9 13 U1 0 U2 2 PU SPRINGER-VERLAG WIEN PI VIENNA PA SACHSENPLATZ 4-6, PO BOX 89, A-1201 VIENNA, AUSTRIA SN 0177-7971 J9 METEOROL ATMOS PHYS JI Meteorol. Atmos. Phys. PY 1991 VL 46 IS 1-2 BP 101 EP 112 DI 10.1007/BF01026627 PG 12 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA FX536 UT WOS:A1991FX53600009 ER PT B AU GORDON, DF AF GORDON, DF BE Ras, ZW Zemankova, M TI IMPROVING THE COMPREHENSIBILITY, ACCURACY, AND GENERALITY OF REACTIVE PLANS SO METHODOLOGIES FOR INTELLIGENT SYSTEMS SE LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Proceedings Paper CT 6TH INTERNATIONAL SYMP ON METHODOLOGIES FOR INTELLIGENT SYSTEMS ( ISMIS 91 ) CY OCT 16-19, 1991 CL UNIV N CAROLINA CHARLOTTE, CHARLOTTE, NC SP IBM CHARLOTTE, UNIV N CAROLINA CHARLOTTE, OAK RIDGE NATL LAB, CTR ENGN SYST ADV RES HO UNIV N CAROLINA CHARLOTTE RP GORDON, DF (reprint author), USN,RES LAB,NAVY CTR APPL RES AI,CODE 5510,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA BERLIN BN 3-540-54563-8 J9 LECT NOTES ARTIF INT PY 1991 VL 542 BP 358 EP 367 PG 10 GA BX76Y UT WOS:A1991BX76Y00037 ER PT B AU SPEARS, WM ANAND, V AF SPEARS, WM ANAND, V BE Ras, ZW Zemankova, M TI A STUDY OF CROSSOVER OPERATORS IN GENETIC PROGRAMMING SO METHODOLOGIES FOR INTELLIGENT SYSTEMS SE LECTURE NOTES IN ARTIFICIAL INTELLIGENCE LA English DT Proceedings Paper CT 6TH INTERNATIONAL SYMP ON METHODOLOGIES FOR INTELLIGENT SYSTEMS ( ISMIS 91 ) CY OCT 16-19, 1991 CL UNIV N CAROLINA CHARLOTTE, CHARLOTTE, NC SP IBM CHARLOTTE, UNIV N CAROLINA CHARLOTTE, OAK RIDGE NATL LAB, CTR ENGN SYST ADV RES HO UNIV N CAROLINA CHARLOTTE RP SPEARS, WM (reprint author), USN,RES LAB,NAVY CTR APPL RES AI,CODE 5510,WASHINGTON,DC 20375, USA. NR 0 TC 7 Z9 7 U1 0 U2 1 PU SPRINGER-VERLAG BERLIN PI BERLIN PA BERLIN BN 3-540-54563-8 J9 LECT NOTES ARTIF INT PY 1991 VL 542 BP 409 EP 418 PG 10 GA BX76Y UT WOS:A1991BX76Y00042 ER PT J AU KEARNS, EA SIMONSON, LG SCHUTT, RW JOHNSON, MJ NEIL, LC AF KEARNS, EA SIMONSON, LG SCHUTT, RW JOHNSON, MJ NEIL, LC TI CHARACTERIZATION OF MONOCLONAL-ANTIBODIES TO 2 TREPONEMA-DENTICOLA SEROTYPES BY THE INDIRECT FLUORESCENT-ANTIBODY ASSAY SO MICROBIOS LA English DT Article ID INFLAMMATORY PERIODONTAL-DISEASE; ADULT HUMANS; MICROSCOPY; BACTERIOLOGY; SEVERITY; PLAQUE AB Members of the genus Treponema have been implicated as possible aetiologic agents of periodontal disease. Previously developed murine monoclonal antibodies (MAbs) to two Treponema denticola strains were characterized by an indirect fluorescent-antibody (IFA) technique. Fifteen T. denticola strains and 32 other bacteria commonly isolated from periodontal pockets were used in the screening process. Two monoclonal antibodies to T. denticola ATCC 33521, serotype B, reacted with five T. denticola isolates, and one monoclonal antibody to T. denticola ATCC 33520, serotype c, reacted with two T. denticola isolates. There was no cross-reactivity between MAbs to the serotypes. Preliminary tests of the MAbs on human periodontal samples show that they are useful in detecting these bacteria in clinical samples. RP KEARNS, EA (reprint author), USN,DENT RES INST,BLDG 1-H,GREAT LAKES,IL 60088, USA. NR 16 TC 5 Z9 5 U1 0 U2 0 PU FACULTY PRESS PI CAMBRIDGE PA 88 REGENT ST, CAMBRIDGE, CAMBS, ENGLAND CB2 1DP SN 0026-2633 J9 MICROBIOS JI Microbios PY 1991 VL 65 IS 264-65 BP 147 EP 153 PG 7 WC Microbiology SC Microbiology GA FB126 UT WOS:A1991FB12600002 PM 2030646 ER PT J AU LOHRMANN, DR AF LOHRMANN, DR TI A COHERENT MM-WAVE RADAR USING AN INCOHERENT TRANSMITTER SO MICROWAVE JOURNAL LA English DT Note AB A coherent mm-wave radar test setup using an incoherent RF pulse source is described. RP LOHRMANN, DR (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU HORIZON HOUSE-MICROWAVE PI NORWOOD PA 685 CANTON ST, NORWOOD, MA 02062 SN 0192-6225 J9 MICROWAVE J JI Microw. J. PD JAN PY 1991 VL 34 IS 1 BP 150 EP & PG 0 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA EV807 UT WOS:A1991EV80700007 ER PT J AU HABERBERGER, RL MIKHAIL, IA BURANS, JP HYAMS, KC GLENN, JC DINIEGA, BM SORGEN, S MANSOUR, N BLACKLOW, NR WOODY, JN AF HABERBERGER, RL MIKHAIL, IA BURANS, JP HYAMS, KC GLENN, JC DINIEGA, BM SORGEN, S MANSOUR, N BLACKLOW, NR WOODY, JN TI TRAVELERS DIARRHEA AMONG UNITED-STATES-MILITARY PERSONNEL DURING JOINT AMERICAN-EGYPTIAN ARMED-FORCES EXERCISES IN CAIRO, EGYPT SO MILITARY MEDICINE LA English DT Article AB A study was conducted of travelers' diarrhea in a United States military population on deployment in Cairo, Egypt, during July and August 1987. Acute diarrhea requiring medical attention developed in 183 (4%) of 4,500 troops. A possible etiologic agent was identified in 49% of all diarrhea cases. Enteric pathogens associated with cases of diarrhea included: Enterotoxigenic Escherichia coli (17% ST-producers, 13% LT-producers, and 3% LT/ST-producers); Shigella (9%); Campylobacter spp. (2%); Salmonella (2%); and Vibrio cholerae non-01 serogroup (2%). Other enteric pathogens isolated from one episode each of diarrhea included Aeromonas hydrophila group, Plesiomonas shigelloides, and Bacillus cereus. Yersinia enterocolitica, enteroinvasive E. coli, intoxications by Clostridium perfringens and Clostridium difficile, and pathogenic enteric parasites were not found in any of the 183 patients with diarrhea. A survey of military personnel not requesting medical care indicated that up to 40% of troops may have had diarrhea during this deployment. Acute gastroenteritis is a potential cause of substantial morbidity in U.S. military personnel deployed to Egypt. RP HABERBERGER, RL (reprint author), USN,MED RES UNIT 3,NEW YORK,NY 09527, USA. NR 0 TC 37 Z9 38 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 JAN PY 1991 VL 156 IS 1 BP 27 EP 30 PG 4 WC Medicine, General & Internal SC General & Internal Medicine GA EQ769 UT WOS:A1991EQ76900010 PM 1900113 ER PT J AU SUMMERS, GM COWAN, ML AF SUMMERS, GM COWAN, ML TI MENTAL-HEALTH ISSUES RELATED TO THE DEVELOPMENT OF A NATIONAL DISASTER RESPONSE SYSTEM SO MILITARY MEDICINE LA English DT Article AB With the creation of the National Disaster Medical System (NDMS), the federal government has moved to develop a national medical plan for responding to major mass casualty situations resulting from either a civilian diaster which overwhelms state and local resources or an overseas conventional conflict. To date, the mental health aspects of this plan have received little attention. This article discusses the rationale for adding a comprehensive mental health component to NDMS within the context of the complementary needs of disaster survivors and rescuers. C1 USN HOSP,BEAUFORT,SC 29902. NR 0 TC 9 Z9 9 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 JAN PY 1991 VL 156 IS 1 BP 30 EP 32 PG 3 WC Medicine, General & Internal SC General & Internal Medicine GA EQ769 UT WOS:A1991EQ76900011 PM 1900114 ER PT J AU HEPPKE, G PFEIFFER, S RANFT, A SHASHIDHAR, R AF HEPPKE, G PFEIFFER, S RANFT, A SHASHIDHAR, R TI UNUSUAL SMECTIC-A LAYERING IN A HOMOLOGOUS SERIES OF ISOTHIOCYANATO COMPOUNDS SO MOLECULAR CRYSTALS AND LIQUID CRYSTALS LA English DT Article ID POLAR MESOGENS; POLYMORPHISM C1 USN, RES LAB, CTR BIOMOLEC SCI & ENGN, CODE 6090, WASHINGTON, DC 20375 USA. TECH UNIV BERLIN, IWAN N STRANSKI INST, SEKR ER11, W-1000 BERLIN 12, GERMANY. NR 13 TC 7 Z9 7 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1542-1406 J9 MOL CRYST LIQ CRYST JI Mol. Cryst. Liquid Cryst. PY 1991 VL 206 BP 31 EP 36 DI 10.1080/00268949108037715 PG 6 WC Crystallography SC Crystallography GA HE374 UT WOS:A1991HE37400004 ER PT J AU NAGUMO, M RATNA, BR QADRI, S NACIRI, J SHASHIDHAR, R AF NAGUMO, M RATNA, BR QADRI, S NACIRI, J SHASHIDHAR, R TI LIQUID-CRYSTALLINE PHASES OF A DIACETYLENIC PHOSPHOCHOLINE LIPID SO MOLECULAR CRYSTALS AND LIQUID CRYSTALS LA English DT Article C1 USN, RES LAB, CTR BIOMOLEC SCI & ENGN, WASHINGTON, DC 20375 USA. GEOCENTERS INC, FT WASHINGTON, MD 20744 USA. GEORGETOWN UNIV, MED CTR, DEPT BIOCHEM, WASHINGTON, DC 20007 USA. USN, RES LAB, CODE 4686, WASHINGTON, DC 20375 USA. NR 10 TC 1 Z9 1 U1 0 U2 1 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1542-1406 J9 MOL CRYST LIQ CRYST JI Mol. Cryst. Liquid Cryst. PY 1991 VL 206 BP 123 EP 130 DI 10.1080/00268949108037724 PG 8 WC Crystallography SC Crystallography GA HE374 UT WOS:A1991HE37400013 ER PT J AU PATRICK, L KEENAN, J AF PATRICK, L KEENAN, J TI UNDERWATER APPLICATION OF ADHESIVES IN SHIP HUSBANDRY SO NAVAL ENGINEERS JOURNAL LA English DT Article AB Wet adhesive technology is currently employed in specific applications of underwater ship husbandry (UWSH). The success and scope of underwater adhesive technology is limited by material and procedural considerations. One class of adhesives, epoxy resins, possesses chemical and physical properties suitable for use in the UWSH environment. Improvements in material capabilities (i.e., biocide impregnation of epoxy resins) are ongoing. Bond formation at the adhesive-surface interface is the primary factor in producing successful adhesion. The intrinsic difficulty of forming adhesive bonds to a wet surface may be overcome by improvements in application procedures (i.e., pretreatment) and through enhancement of the chemical bonding capabilities of adhesives. Incorporating technological and procedural improvements in underwater adhesive technology into standardized application processes could greatly increase the capability and scope of UWSH. RP PATRICK, L (reprint author), USN,SHIPYARD,CHARLESTON,SC 29408, USA. NR 0 TC 1 Z9 1 U1 0 U2 2 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 JAN PY 1991 VL 103 IS 1 BP 50 EP 58 PG 9 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA ET703 UT WOS:A1991ET70300005 ER PT J AU DINENNO, PJ FORSSELL, EW BACK, GG OUELLETTE, RJ FULPER, C MCCRORY, D BARYLSKI, D AF DINENNO, PJ FORSSELL, EW BACK, GG OUELLETTE, RJ FULPER, C MCCRORY, D BARYLSKI, D TI HALON 1301 TEST GAS SIMULANTS SO NAVAL ENGINEERS JOURNAL LA English DT Article AB All new and retrofit installations of Halon 1301 total flooding fire protection systems in U.S. Navy shipboard machinery spaces require an acceptance discharge test. The primary reason for this testing is the verification of system design and performance (discharge time, initial concentration, maintenance of concentration, etc.). It is desirable to use a simulant instead of Halon 1301 in these tests in view of its contribution to stratospheric ozone depletion. Sulfur hexafluoride, SF6, was identified as a possible simulant on the basis of its similarity to Halon 1301 in physical and chemical properties. A detailed investigation was performed on the use of SF6 as a simulant, which led to a full scale evaluation on board the USS Chancellorsville (CG-62). This investigation demonstrated that sulfur hexafluoride is an excellent simulant for Halon 1301 in acceptance discharge tests of total flooding fire protection systems. As a direct consequence, the U.S. Navy has begun to use SF6 in their acceptance discharge tests. The transition from testing with Halon 1301 to testing with SF6 was completed by March 1990. C1 USN,RES LAB,NAVAL TECHNOL CTR SAFTEY & SURVIVABIL,WASHINGTON,DC 20375. 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 JAN PY 1991 VL 103 IS 1 BP 59 EP 69 PG 11 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA ET703 UT WOS:A1991ET70300006 ER PT J AU BALES, SML AF BALES, SML TI THE NEW ROAD - OCEAN AND NAVAL ENGINEERING IN THE 1990S SO NAVAL ENGINEERS JOURNAL LA English DT Article RP BALES, SML (reprint author), OFF NAVAL RES,PROGRAM SUPPORT & SPECIAL PROGRAMS,ARLINGTON,VA 22217, 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 JAN PY 1991 VL 103 IS 1 BP 75 EP 78 PG 4 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA ET703 UT WOS:A1991ET70300008 ER PT J AU MAHNCKE, FC AF MAHNCKE, FC TI SMALLER WARS - PROSPECTS FOR SURFACE WARFARE SO NAVAL ENGINEERS JOURNAL LA English DT Article AB Engineering requirements for naval surface warfare weapons systems are partially driven by the geopolitical world to which the Navy must address itself. That solution is changing rapidly; it appears likely that an increasing emphasis will be placed on the Navy's ability to deal with smaller wars, wars of less than global scope. Driven by different rules of engagement and scope, these wars will impose unique weapon systems requirements, particularly in the areas of intelligence and surveillance, command and control, offensive weapons and defensive systems. This paper addresses the increasing likelihood of smaller wars, the special characteristics of such wars, and outlines some of the naval weapons systems requirements that may result. RP MAHNCKE, FC (reprint author), NAVAL SURFACE WARFARE CTR,WHITE OAK,MD, 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 JAN PY 1991 VL 103 IS 1 BP 79 EP 82 PG 4 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA ET703 UT WOS:A1991ET70300009 ER PT J AU SHOEMAKER, PA CARLIN, MJ SHIMABUKURO, RL AF SHOEMAKER, PA CARLIN, MJ SHIMABUKURO, RL TI BACK PROPAGATION LEARNING WITH TRINARY QUANTIZATION OF WEIGHT UPDATES SO NEURAL NETWORKS LA English DT Article DE NEURAL NETWORKS; LEARNING ALGORITHMS; BACK PROPAGATION; TRINARY; VLSI IMPLEMENTATIONS; NONVOLATILE WEIGHTS AB We have studied a simple variant of back propagation learning in networks with three-layer feedforward architecture, in which weight updates are constrained to assume one of only three values: an increment, a decrement of the same magnitude, or zero. An important motivation for this study is the potential for parallel implementation of learning rules with such coarsely quantized parameter changes in analog integrated circuitry. Trials performed on three small benchmark problems demonstrate that back propagation with this trinary update quantization can converge on satisfactory solutions of each of these problems, and within the range of parameters we used requires three to 10 times fewer iterations than a comparable version of standard back propagation. We present some evidence suggesting that this difference is due at least in part to the scaling imposed by the quantization scheme upon the vector of weight and bias updates. Tolerance of the final networks to parameter errors or faults in the form of random, normally distributed variations in the weight and bias values was examined and found to compare favorably with that of networks trained with standard back propagation. RP SHOEMAKER, PA (reprint author), USN,CTR OCEAN SYST,CODE 551,SAN DIEGO,CA 92152, USA. NR 21 TC 16 Z9 16 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0893-6080 J9 NEURAL NETWORKS JI Neural Netw. PY 1991 VL 4 IS 2 BP 231 EP 241 DI 10.1016/0893-6080(91)90007-R PG 11 WC Computer Science, Artificial Intelligence SC Computer Science GA FD686 UT WOS:A1991FD68600007 ER PT J AU MOORE, PWB ROITBLAT, HL PENNER, RH NACHTIGALL, PE AF MOORE, PWB ROITBLAT, HL PENNER, RH NACHTIGALL, PE TI RECOGNIZING SUCCESSIVE DOLPHIN ECHOES WITH AN INTEGRATOR GATEWAY NETWORK SO NEURAL NETWORKS LA English DT Article DE DOLPHINS; ECHOLOCATION; INTEGRATOR GATEWAY NETWORK; SONAR; SIGNAL PROCESSING ID ATLANTIC BOTTLENOSE DOLPHIN; COUNTERPROPAGATION NETWORKS; TURSIOPS-TRUNCATUS; BEAM AB An novel network architecture, the integrator gateway network, was developed to classify multiple successive echoes from targets ensonified by a dolphin's natural echolocation signal in a naturalistic environment. The inputs to the network were spectral vectors of the returning echo plus one unit representing the start of each scan. This network combined information from successive echoes returning from the same target and reset between scans of different targets. The network was trained on a small subset (4%) of the total set of available echoes (1,335). Depending on the measure used to assess it, the network correctly classified between 90-93% of all echo trains. In contrast, a standard back propagation network with the same number of units and variable connections as in the integrator gateway network performed with only 63% accuracy in classifying echo trains. The integration model seems to provide a better account of the dolphin's performance than a decision model that does not combine information from multiple echoes. Although it does not prove that dolphins similarly combine information from multiple echoes, in the absence of relevant neurophysiological evidence, it provides support for such a hypothesis. It also suggests the potential beneifits to be derived for pattern recognition from combining multiple samples from the same target. C1 UNIV HAWAII,HONOLULU,HI 96822. RP MOORE, PWB (reprint author), USN,CTR OCEAN SYST,KAILUA,HI 96734, USA. NR 24 TC 31 Z9 32 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0893-6080 J9 NEURAL NETWORKS JI Neural Netw. PY 1991 VL 4 IS 6 BP 701 EP 709 DI 10.1016/0893-6080(91)90051-6 PG 9 WC Computer Science, Artificial Intelligence SC Computer Science GA GW465 UT WOS:A1991GW46500001 ER PT B AU CAMPILLO, AJ EVERSOLE, JD LIN, HB MERRITT, CD AF CAMPILLO, AJ EVERSOLE, JD LIN, HB MERRITT, CD BE CANTRELL, CD BOWDEN, CM TI CAVITY QED ENHANCED SPONTANEOUS EMISSION AND LASING IN LIQUID DROPLETS SO NONLINEAR OPTICS AND MATERIALS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT CONF ON NONLINEAR OPTICS AND MATERIALS CY MAY 08-10, 1991 CL DALLAS, TX SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS RP CAMPILLO, AJ (reprint author), USN,RES LAB,LASER PHYS BRANCH,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 1 U2 3 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA BELLINGHAM BN 0-8194-0606-6 J9 P SOC PHOTO-OPT INS PY 1991 VL 1497 BP 78 EP 89 DI 10.1117/12.46765 PG 12 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Optics; Physics, Applied SC Engineering; Materials Science; Optics; Physics GA BU36Y UT WOS:A1991BU36Y00006 ER PT J AU FISCHER, JE MILLIKEN, JW MAGERL, A KIM, HJ MOORE, AW AF FISCHER, JE MILLIKEN, JW MAGERL, A KIM, HJ MOORE, AW TI INTERCALATED GRAPHITE NEUTRON OPTICAL-COMPONENTS - LOW-MOSAIC ACCEPTOR COMPOUNDS WITH LARGE D-SPACINGS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Letter AB Neutron and gamma diffraction (00L) rocking curves of stage-1 AsF5-graphite intercalation compounds have been performed. The intrinsic c-axis mosaic FWHM is 0.8-degrees, significantly less than the value typical of donor compounds. This suggests that intercalation with large molecules may provide new options for the development of long-wavelength neutron monochromators and filters. C1 USN,RES LAB,WASHINGTON,DC 20350. INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE. UNION CARBIDE COATINGS SERV CORP,PARMA,OH 44130. RP FISCHER, JE (reprint author), UNIV PENN,RES STRUCT MATTER LAB,PHILADELPHIA,PA 19104, USA. RI Magerl, Andreas/E-1797-2013 NR 7 TC 1 Z9 1 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JAN 1 PY 1991 VL 300 IS 1 BP 207 EP 209 DI 10.1016/0168-9002(91)90725-6 PG 3 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA EX216 UT WOS:A1991EX21600027 ER PT J AU MISAS, JE COLD, CJ HALL, FW AF MISAS, JE COLD, CJ HALL, FW TI VULVAR PAGET DISEASE - FLUORESCEIN-AIDED VISUALIZATION OF MARGINS SO OBSTETRICS AND GYNECOLOGY LA English DT Article AB Two women with extramammary Paget disease of the vulva were given fluorescein intravenously in order to visualize disease margins with the use of an ultraviolet light. As a diagnostic modality, the technique was found to have a positive predictive value of 97.4% and a negative predictive value of 99.9%. The accuracy of the fluorescein technique was compared with gross visualization using a histologic mapping technique. A total of 2424 fields were mapped and the predictive accuracy of each test was determined. A chi-2 test demonstrated fluorescein visualization to be a significantly better predictor of a disease state. Fluorescein visualization is suggested as an adjunct to surgical management of patients with primary vulvar Paget disease. C1 USN HOSP,DEPT OBSTET & GYNECOL,SAN DIEGO,CA 92134. USN HOSP,DEPT LAB MED,DIV ANAT PATHOL,SAN DIEGO,CA 92134. USN HOSP,DEPT CLIN INVEST,SAN DIEGO,CA 92134. NR 12 TC 20 Z9 21 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0029-7844 J9 OBSTET GYNECOL JI Obstet. Gynecol. PD JAN PY 1991 VL 77 IS 1 BP 156 EP 159 PG 4 WC Obstetrics & Gynecology SC Obstetrics & Gynecology GA EP415 UT WOS:A1991EP41500033 PM 1845778 ER PT J AU GRUBBSTROM, RW ASHCROFT, SH AF GRUBBSTROM, RW ASHCROFT, SH TI APPLICATION OF THE CALCULUS OF VARIATIONS TO FINANCING ALTERNATIVES SO OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE LA English DT Article DE FINANCIAL; INVESTMENT; CALCULUS OF VARIATIONS; LAGRANGE MULTIPLIERS; NET PRESENT VALUE ID INVESTMENT; CONSUMPTION; POLICIES AB The problem considered is to choose from a finite set of inter-related investment and financing alternatives and also levels of consumption/work over time in order to maximise a utility functional. Each investment and financing option is characterised by its cash flow over time. An inter-temporal budget requirement operates continuously. Application of Calculus of Variations leads to consideration of the Euler-Lagrange equations combined with Kulm-Tucker conditions. It is shown that the solution (also when there are logical dependencies present) requires the maximisation of a Generalised Net Present Wealth measure in which the discount factor is formed from an integral of the Lagrangean multiplier function. C1 UNIV LANCASTER,LANCASTER LA1 4YW,ENGLAND. RP GRUBBSTROM, RW (reprint author), USN,POSTGRAD SCH,DEPT ADM SCI,MONTEREY,CA 93943, USA. NR 42 TC 6 Z9 6 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0305-0483 J9 OMEGA-INT J MANAGE S JI Omega-Int. J. Manage. Sci. PY 1991 VL 19 IS 4 BP 305 EP 316 DI 10.1016/0305-0483(91)90047-W PG 12 WC Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA FZ159 UT WOS:A1991FZ15900011 ER PT J AU IGBARIA, M ZVIRAN, M AF IGBARIA, M ZVIRAN, M TI END-USER EFFECTIVENESS - A CROSS-CULTURAL EXAMINATION SO OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE LA English DT Article DE INFORMATION SYSTEMS; END-USER COMPUTING; EFFECTIVENESS ID MANAGEMENT INFORMATION-SYSTEMS; KEY ISSUES; SUCCESS; MICROCOMPUTERS; SATISFACTION; USAGE AB This study tests the proposed effect of national environments on end-user computing (EUC). Data were collected from seven American and ten Israeli companies. The participants were 138 Israeli end-users and 156 US end-users, all holding managerial positions. The results indicate some major differences between the two samples; Israeli managers had more computer experience and training than US managers, while US managers reported a much higher level of information center support and showed more favorable attitudes toward EUC than did their Israeli counterparts. Significant differences were also found between the two cultures in end-user satisfaction and overall system usage; US managers were found to be less satisfied with their information systems and used them less frequently than Israeli managers. On the other hand, Israeli managers reported using the system for fewer tasks and features. These findings are discussed and conclusions are drawn concerning the need for cross-cultural studies in the information systems field in general and in end-user computing in particular. C1 USN,POSTGRAD SCH,MONTEREY,CA 93943. DREXEL UNIV,PHILADELPHIA,PA 19104. NR 54 TC 7 Z9 7 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0305-0483 J9 OMEGA-INT J MANAGE S JI Omega-Int. J. Manage. Sci. PY 1991 VL 19 IS 5 BP 369 EP 379 DI 10.1016/0305-0483(91)90055-X PG 11 WC Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA GF209 UT WOS:A1991GF20900006 ER PT J AU HUBLER, GK WADDELL, CN DONOVAN, EP ZAVADA, JM AF HUBLER, GK WADDELL, CN DONOVAN, EP ZAVADA, JM TI BELOW-BANDGAP REFRACTIVE-INDEX OF ALAS GAAS MULTIPLE QUANTUM-WELLS SO OPTICAL AND QUANTUM ELECTRONICS LA English DT Article ID OPTICAL-PROPERTIES; SUPERLATTICES AB Precision reflection measurements were performed on GaAs/AlAs superlattices of the same composition but different layer spacings. Nonlinear-least-squares fits to the data were performed to a single layer. Measurements were extracted for the superlattice thickness, thickness of a disturbed interface layer between the superlattice and substrate, the uniformity in composition and/or spacing and the composition. It was demonstrated that these nondestructive measurements in the infrared region (3000 to 12 000 cm-1) in conjunction with a simple single layer model are capable of accurately yielding the above quantities with high precision. C1 USA,RES OFF,RALEIGH,NC 27709. RP HUBLER, GK (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 15 TC 2 Z9 2 U1 0 U2 1 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0306-8919 J9 OPT QUANT ELECTRON JI Opt. Quantum Electron. PY 1991 VL 23 IS 7 BP S883 EP S893 DI 10.1007/BF00624977 PG 11 WC Engineering, Electrical & Electronic; Optics SC Engineering; Optics GA GD239 UT WOS:A1991GD23900010 ER PT J AU GEDRIDGE, RW HIGA, KT NISSAN, RA AF GEDRIDGE, RW HIGA, KT NISSAN, RA TI SYNTHESES AND MECHANISTIC STUDIES OF SYMMETRICAL TETRAORGANYLTELLURIUM(IV) (R4TE) AND DIORGANYLTELLURIUM(II) (R'2TE) COMPOUNDS (R = R' = ME, NORMAL-BU, ME3SICH2, AND CH2=CH-R' = TERT-BU AND ALLYL) SO ORGANOMETALLICS LA English DT Article ID MAGNETIC-RESONANCE SPECTROSCOPY; METALORGANIC GROWTH; DIALKYL TELLURIDE; ORGANIC-COMPOUNDS; CHEMICAL-SHIFTS; HGTE FILMS; CDTE; ORGANOTELLURIDES; CHEMISTRY; ACETYLENE AB Tetraorganyltellurium(IV) compounds (R4Te, R = Me, n-Bu, Me3SiCH2, and CH2 = CH) have been prepared by the reaction of TeCl4 with 4 equiv of LiR or RMgX. Decomposition of the R4Te compounds led to the formation of the symmetric diorganyltellurium(II) compounds (R2Te). Me4Te and (Me3SiCH2)4Te thermally and photolytically decomposed by a free-radical pathway. (CH2 = CH)4Te decomposed by noncoupling reductive elimination. While (t-Bu)2Te and (allyl)2Te have also been prepared by the reaction of TeCl4 with 4 equiv of (t-Bu)Li or (allyl)MgCl, respectively, their corresponding R4Te intermediates could not be isolated. (t-Bu)2Te was also isolated as a minor product from the reaction of (t-Bu)TeLi with (t-Bu)I in THF. (Allyl)2Te was prepared by the reaction of Li2Te with 2 equiv of (allyl)I in THF. These compounds have been characterized by H-1, C-13, and Te-125 NMR spectroscopies. RP GEDRIDGE, RW (reprint author), USN,CTR WEAP,RES DEPT,DIV CHEM,CHINA LAKE,CA 93555, USA. NR 51 TC 28 Z9 28 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD JAN PY 1991 VL 10 IS 1 BP 286 EP 291 DI 10.1021/om00047a062 PG 6 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA ER630 UT WOS:A1991ER63000062 ER PT J AU SCOVILL, JP KLAYMAN, DL FLIPPENANDERSON, JL GILARDI, R AF SCOVILL, JP KLAYMAN, DL FLIPPENANDERSON, JL GILARDI, R TI 1,3,4-THIADIAZOLES FROM THIOSEMICARBAZIDES SO PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS LA English DT Article DE 4,4-DIALKYL-3-THIOSEMICARBAZIDES; 4,4-DIALKYL-3-THIOSEMICARBAZONES; 1,1-DIALKYL-6-[1-(ARYLETHYLIDENE) AMINO]-2,5-DITHIOBIUREAS; (5-DIALKYLAMINO-1,3,4-THIADIAZOL-2-YL) HYDRAZONES; ACID CATALYZED CYCLIZATION C1 USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. RP SCOVILL, JP (reprint author), WALTER REED ARMY MED CTR,DIV EXPTL THERAPEUT,WASHINGTON,DC 20307, USA. NR 11 TC 1 Z9 1 U1 0 U2 0 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0308-664X J9 PHOSPHORUS SULFUR JI Phosphorus Sulfur Silicon Relat. Elem. PY 1991 VL 63 IS 3-4 BP 273 EP 281 DI 10.1080/10426509108036830 PG 9 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA GZ079 UT WOS:A1991GZ07900008 ER PT J AU EKBERG, JO FELDMAN, U SEELY, JF BROWN, CM MACGOWAN, BJ KANIA, DR KEANE, CJ AF EKBERG, JO FELDMAN, U SEELY, JF BROWN, CM MACGOWAN, BJ KANIA, DR KEANE, CJ TI ANALYSIS OF MAGNESIUMLIKE SPECTRA FROM MO XXXI TO CS XLIV SO PHYSICA SCRIPTA LA English DT Article ID MG-LIKE IONS; ENERGY-LEVELS; CU-XVIII; ISOELECTRONIC SEQUENCE; EXTENDED ANALYSIS; TFR TOKAMAK; GE-XXI; ZN-XIX; TRANSITIONS; PLASMAS AB Transitions in the magnesium like ions of the elements Mo, Rh, Ag, Cd, In, Sn, Sb, I and Cs have been identified in the extreme ultraviolet spectra from laser-produced plasmas. The configurations considered are 3s2, 3s3p, 3p2, 3s3d, 3p3d, and 3d2. Based on the observations, fitted energy values of 34 levels are presented for all of the elements from Nb to Nd (Z = 41-60). The interaction of the J = 2 levels of the 3p2 and 3s3d configurations in the range Z = 45-55 is considered in detail. C1 UNIV CALIF LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV LUND,DEPT PHYS,S-22101 LUND,SWEDEN. RP EKBERG, JO (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 33 TC 31 Z9 37 U1 0 U2 1 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0281-1847 J9 PHYS SCRIPTA JI Phys. Scr. PD JAN PY 1991 VL 43 IS 1 BP 19 EP 32 DI 10.1088/0031-8949/43/1/004 PG 14 WC Physics, Multidisciplinary SC Physics GA ER956 UT WOS:A1991ER95600004 ER PT J AU SHEN, CY VERONIS, G AF SHEN, CY VERONIS, G TI SCALE TRANSITION OF DOUBLE-DIFFUSIVE FINGER CELLS SO PHYSICS OF FLUIDS A-FLUID DYNAMICS LA English DT Article ID SALT FINGERS AB The processes that bring about the change of cell size in the evolution of salt-finger convection are investigated with a numerical model of the convection in a Hele-Shaw cell. It is shown that the increase of cell width during the convection is produced by the vertical penetration of increasingly wider cells from the edges of the finger zone into the interior, as has been observed in a laboratory experiment. The increase of scale is also shown to occur through the merging process in which narrow finger cells merge to form wider cells. Occasionally, transition from wide to narrow scale can occur, in which case the wide finger cell splits to form two or more narrow cells. The scale transition produced by the merging, penetration, and splitting processes is shown to have the effect of maximizing the buoyancy flux generation in an evolving finger convection. This maximization is also interpreted in terms of the most rapidly growing finger mode. The effect of the scale transition on the actual magnitude of the buoyancy flux is related to the energy dissipation of fingers. C1 YALE UNIV,KLINE GEOL LAB,DEPT GEOL & GEOPHYS,NEW HAVEN,CT 06511. RP SHEN, CY (reprint author), USN,RES LAB,OCEAN DYNAM BRANCH,CODE 5140,WASHINGTON,DC 20375, USA. NR 10 TC 11 Z9 11 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 JAN PY 1991 VL 3 IS 1 BP 58 EP 68 DI 10.1063/1.857864 PG 11 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA EQ013 UT WOS:A1991EQ01300006 ER PT J AU PICONE, JM DAHLBURG, RB AF PICONE, JM DAHLBURG, RB TI EVOLUTION OF THE ORSZAG-TANG VORTEX SYSTEM IN A COMPRESSIBLE MEDIUM .2. SUPERSONIC-FLOW SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID MAGNETOHYDRODYNAMIC TURBULENCE; WAVES AB The numerical investigation of the Orszag-Tang vortex system in compressible magnetofluids continues, this time using initial conditions with embedded supersonic regions. The simulations have initial average Mach numbers M = 1.0 and 1.5 and beta = 10/3 with Lundquist numbers S = 50, 100, or 200. Depending on the particular set of parameters, the numerical grid contains 256(2) or 512(2) collocation points. The behavior of the system differs significantly from that found previously for the incompressible and subsonic analogs. Shocks form at the downstream boundaries of the embedded supersonic regions outside the central magnetic X point and produce strong local current sheets that dissipate appreciable magnetic energy. Reconnection at the central X point, which dominates the incompressible and subsonic systems, peaks later and has a smaller impact as M increases from 0.6 to 1.5. Reconnection becomes significant only after shocks reach the central region, compressing the weak current sheet there. Similarly, the correlation between the momentum and magnetic field begins significant growth later than in subsonic and incompressible flows. The shocks bound large compression regions, which dominate the wave-number spectra of autocorrelations in mass density, velocity, and magnetic field. The normalized spectral amplitude of the cross helicity is almost zero over the middle and upper portions of the wave-number domain, unlike the incompressible and subsonic flows. The thermal and magnetic pressures are anticorrelated over a wide wave-number range during the earlier portion of the calculations, consistent with the presence of quasistationary structures bounded by shocks. RP PICONE, JM (reprint author), USN,RES LAB,COMPUTAT PHYS & FLUID DYNAM LAB,WASHINGTON,DC 20375, USA. NR 22 TC 65 Z9 66 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 JAN PY 1991 VL 3 IS 1 BP 29 EP 44 DI 10.1063/1.859953 PG 16 WC Physics, Fluids & Plasmas SC Physics GA ER257 UT WOS:A1991ER25700005 ER PT J AU SCHMITT, AJ AF SCHMITT, AJ TI 3-DIMENSIONAL FILAMENTATION OF LIGHT IN LASER PLASMAS SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID INDUCED SPATIAL INCOHERENCE; FLOWING PLASMAS; FUSION; BEAM; SUPPRESSION; INSTABILITY; SCATTERING; TARGETS AB The first calculations of time-dependent laser-plasma filamentation in three dimensions are reported. These calculations are done with a three-dimensional laser propagation code based on a previous two-dimensional code [Phys. Fluids 31, 3079 (1988)]. The effect of incident beam structure, and in particular optical smoothing techniques, on the behavior of filamentation is studied. Both ponderomotive and thermal conduction dominated nonlinearities are considered, and calculations are done simulating both homogeneous nonabsorbing plasmas and inhomogeneous laboratory plasmas. Random phase screen (RPS) and induced spatial incoherence (ISI) optical smoothing techniques are investigated and compared to generic unsmoothed laser beams. Qualitative examples are presented and scaling studies are done and compared to a simple theoretical analysis. In typical laser-plasma interactions without optical smoothing, three-dimensional effects lead to greatly increased filament intensities, as expected. Peak filament intensities of order 100-500 times the average intensity are routinely observed (without optical smoothing), as compared to earlier two-dimensional calculations where peak intensities were of order 10-50 times average. In spite of this tendency to create stronger filaments, three-dimensional filamentational (when measured on a time-averaged basis) can be suppressed by using ISI smoothing. Under the same conditions, instantaneous ISI intensities can show considerable enhancement, although much less than the unsmoothed beams. RPS smoothing exhibits less filamentation suppression. Under laser-fusion reactor conditions, calculations indicate that ISI suppression can completely eliminate filamentation. RP SCHMITT, AJ (reprint author), USN,RES LAB,DIV PLASMA PHYS,LASER PLASMA BRANCH,WASHINGTON,DC 20375, USA. NR 22 TC 35 Z9 36 U1 0 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 JAN PY 1991 VL 3 IS 1 BP 186 EP 194 DI 10.1063/1.859936 PG 9 WC Physics, Fluids & Plasmas SC Physics GA ER257 UT WOS:A1991ER25700020 ER PT J AU TERRY, RE PEREIRA, NR AF TERRY, RE PEREIRA, NR TI LEAKAGE CURRENTS OUTSIDE AN IMPLODING Z-PINCH SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID DYNAMICS; FIELD; FLOW AB Leakage currents outside a pulse-line-driven Z pinch are considered in two circumstances. In the initial stage of the pinch a non-neutral electron flow can arise before magnetic insulation is established. The relative importance of such currents is estimated in terms of diode impedance and pulse-line dimensions. In the later stages of the pinch a neutralized current flow can arise in any tenuous plasma that may be present in the pinch periphery. The effects of the neutral current are estimated through self-similar solutions to gyrokinetic equation. The collisionless plasma corona can contain an important fraction of the implosion energy. C1 BERKELEY RES ASSOCIATES INC,SPRINGFIELD,VA 22150. RP TERRY, RE (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 24 TC 2 Z9 2 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD JAN PY 1991 VL 3 IS 1 BP 195 EP 203 DI 10.1063/1.859937 PG 9 WC Physics, Fluids & Plasmas SC Physics GA ER257 UT WOS:A1991ER25700021 ER PT J AU KRALL, J TANG, CM JOYCE, G SPRANGLE, P AF KRALL, J TANG, CM JOYCE, G SPRANGLE, P TI STABILITY REGIMES IN A HELICAL QUADRUPOLE FOCUSING ACCELERATOR - THEORY AND SIMULATION SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID BETATRON AB The inclusion of helical quadrupole (stellarator) and axial guide fields in high current spiral line or recirculating accelerator configurations provides a high tolerance to energy mismatch and confines the beam against space charge forces. Such a configuration is studied via three-dimensional particle simulation. It is found that the electron beam centroid motion can interact with the external fields and with the TE11 waveguide mode to obtain (i) highly unstable particle orbits, (ii) the electromagnetic three-wave instability, or (iii) a fully stable beam. Theoretical stability conditions are presented in the limit of zero beam current and are found to be good predictors of simulation results. Minor departures from the stability conditions at high current are discussed in terms of the full linear dispersion relation. Saturation of the instability without beam loss is observed in some cases. This is the result of detuning in the relativistic cyclotron wave number as the beam energy and axial velocity decrease. The effectiveness of this detuning mechanism is evaluated for the various regimes. RP KRALL, J (reprint author), USN,RES LAB,DIV PLASMA PHYS,BEAM PHYS BRANCH,WASHINGTON,DC 20375, USA. NR 12 TC 3 Z9 3 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 JAN PY 1991 VL 3 IS 1 BP 204 EP 211 DI 10.1063/1.859938 PG 8 WC Physics, Fluids & Plasmas SC Physics GA ER257 UT WOS:A1991ER25700022 ER PT J AU MCCURDY, AH ARMSTRONG, CM AF MCCURDY, AH ARMSTRONG, CM TI MODE SELECTION BY PRIMING IN AN OVERMODED ELECTRON-CYCLOTRON MASER SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID OSCILLATOR; GYROTRON; OPERATION AB It has been found that an externally injected signal can strongly influence the steady-state electromagnetic mode in which a pulsed electron cyclotron maser (ECM) operates. A careful experimental examination reveals that the process by which this occurs is similar to the oscillator phase priming noted previously in magnetron work. It is found here that the degree of mode control depends on the injected signal power level (relative to the ECM noise power level), frequency, and time of application. Mode control is obtained at power levels nearly four orders of magnitude below that of the steady-state ECM output power and over frequency bandwidths several times that of the cavity resonance band. The optimum input signal is a circularly polarized wave, corotating with the electron cyclotron motion. The experimental results are compared with a quasilinear coupled-mode theory. The theory is used to provide analytic predictions of the temporal mode evolution through third-order coupling. The comparison with experiment indicates that higher-order terms are non-negligible in some regimes of operation. However, this model suitably predicts ECM steady-state operation over much of the operating parameter space and gives a qualitative understanding of the role of the external signal and preoscillation noise in the mode selection process. Mode priming may enable stable and efficient single-mode operation of the ECM and other overmoded sources of coherent radiation. C1 USN,RES LAB,DIV ELECTR SCI & TECHNOL,WASHINGTON,DC 20375. RP MCCURDY, AH (reprint author), UNIV SO CALIF,DEPT ELECT ENGN,LOS ANGELES,CA 90089, USA. NR 17 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 JAN PY 1991 VL 3 IS 1 BP 212 EP 227 DI 10.1063/1.859939 PG 16 WC Physics, Fluids & Plasmas SC Physics GA ER257 UT WOS:A1991ER25700023 ER PT J AU SCHLESINGER, MF AF SCHLESINGER, MF TI NONLINEARITY AT THE NAVAL-RESEARCH-OFFICE SO PHYSICS TODAY LA English DT Letter RP SCHLESINGER, MF (reprint author), OFF NAVAL RES,ARLINGTON,VA 22217, USA. NR 1 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 0031-9228 J9 PHYS TODAY JI Phys. Today PD JAN PY 1991 VL 44 IS 1 BP 15 EP & PG 0 WC Physics, Multidisciplinary SC Physics GA ET737 UT WOS:A1991ET73700005 ER PT J AU SCHER, H SHLESINGER, MF BENDLER, JT AF SCHER, H SHLESINGER, MF BENDLER, JT TI TIME-SCALE INVARIANCE IN TRANSPORT AND RELAXATION SO PHYSICS TODAY LA English DT Article ID TRANSIENT PHOTOCONDUCTIVITY; SEMICONDUCTORS; DISPERSION; TRANSITION; SOLIDS; AS2SE3; STATES; MODEL C1 OFF NAVAL RES, DIV PHYS, ARLINGTON, VA 22217 USA. GE, PHYS, SCHENECTADY, NY 12345 USA. RP BP RES, CLEVELAND, OH USA. NR 37 TC 431 Z9 433 U1 1 U2 30 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0031-9228 EI 1945-0699 J9 PHYS TODAY JI Phys. Today PD JAN PY 1991 VL 44 IS 1 BP 26 EP 34 DI 10.1063/1.881289 PG 9 WC Physics, Multidisciplinary SC Physics GA ET737 UT WOS:A1991ET73700008 ER PT J AU NAGODE, JB ROLAND, CM AF NAGODE, JB ROLAND, CM TI MISCIBLE MIXTURES OF POLYCHLOROPRENE AND EPOXIDIZED POLYISOPRENE SO POLYMER LA English DT Article DE POLYCHLOROPRENE; EPOXIDIZED POLYISOPRENE; MISCIBLE BLENDS; MELTING POINT ID POLYVINYL METHYL-ETHER) BLENDS; COMPATIBLE POLYMER BLENDS; MELTING-POINT DEPRESSION; POLY(VINYLIDENE FLUORIDE); CHLORINATED POLYMERS; NATURAL-RUBBER; MUTUAL DIFFUSION; CHI-PARAMETER; MISCIBILITY; TEMPERATURE AB Blends of polychloroprene and epoxidized polyisoprene are demonstrated to be thermodynamically miscible. This miscibility, affirmed by spontaneous interdiffusion between the two polymers, results in the customary single, and composition-dependent, glass transition temperature. Fourier-transform infra-red spectra from the mixture provide direct evidence of specific interaction between the chlorine and the epoxy group. From the invariance of the crystalline melting temperature of the polychloroprene (the equilibrium value of which is determined to be 150-degrees-C), a lower limit of 5 X 10(-2) is estimated for the interaction parameter. C1 USN,RES LAB,DIV CHEM,CODE 6120,WASHINGTON,DC 20375. NR 61 TC 30 Z9 30 U1 1 U2 1 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0032-3861 J9 POLYMER JI Polymer PY 1991 VL 32 IS 3 BP 505 EP 509 DI 10.1016/0032-3861(91)90457-T PG 5 WC Polymer Science SC Polymer Science GA EX023 UT WOS:A1991EX02300019 ER PT J AU PACE, MD ROLAND, CM AF PACE, MD ROLAND, CM TI CHARACTERIZATION OF RADICAL DEFECTS FROM ABRASION AND UV-PHOTOLYSIS IN POLY(ETHYLENE-TEREPHTHALATE) FIBERS SO POLYMER LA English DT Article DE POLY(ETHYLENE TEREPHTHALATE); ELECTRON PARAMAGNETIC RESONANCE; FREE RADICALS; ABRASION ID CRYSTALLINE AB Radical products in poly(ethylene terephthalate) fibres are characterized using electron paramagnetic resonance (e.p.r.) spectroscopy. Different radical species are detected depending upon whether mechanical abrasion or ultraviolet (u.v.) light is used to degrade the fibre samples. From u.v.-photolysis at 77 K (liquid nitrogen) e.p.r. signals consistent with carbon-centred radicals are observed having a line shape centred at g = 2.0034. (The g factor is a scalar which depends upon the environment of the unpaired spin. For a free electron g = 2.0023.) From mechanical abrasion at 77 K a completely different e.p.r. pattern of two peaks is recorded consistent with an oxygen-centred species. The spectrum has one component centred at g = 2.0318 and another component centred at g = 2.0094. At room temperature only one signal is detected after decay of overlapping components for both abrasion and u.v. signals. RP PACE, MD (reprint author), USN,RES LAB,CODE 6120,WASHINGTON,DC 20375, USA. NR 20 TC 3 Z9 3 U1 0 U2 2 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0032-3861 J9 POLYMER JI Polymer PY 1991 VL 32 IS 6 BP 1027 EP 1030 DI 10.1016/0032-3861(91)90588-A PG 4 WC Polymer Science SC Polymer Science GA FH548 UT WOS:A1991FH54800008 ER PT J AU SCRIBNER, DA KRUER, MR KILLIANY, JM AF SCRIBNER, DA KRUER, MR KILLIANY, JM TI INFRARED FOCAL PLANE ARRAY TECHNOLOGY SO PROCEEDINGS OF THE IEEE LA English DT Review ID CHARGE-COUPLED-DEVICES; IMAGING ARRAY; DETECTORS; HGCDTE; HYBRID; INJECTION; READOUT; SEMICONDUCTORS; PERFORMANCE; LIMITATIONS AB Infrared focal plane arrays (IRFPA's) are a critical component needed for advanced infrared imaging systems. Major advances in infrared detectors and microelectronics have led to the development of large area arrays of detectors fabricated using integrated circuit techniques. Requirements for IRFPA's are discussed and an overview is given of different IRFPA architectures. Traditionally, IRFPA's were either hybrid or monolithic architectures, but innovations in epitaxial growth of thin films now allow a number of useful variations. Important IR detector structures are reviewed including photoconductive, photovoltaic, metal-insulator-semiconductor (MIS), and Schottky barrier. Infrared detector materials and related crystal growth techniques are also discussed. In all cases the emphasis is on applicability to IRFPA designs and performance. An important aspect of hybrid arrays is the coupling of the detector to the readout circuitry. This is accomplished through an input circuit-three examples are discussed, namely direct injection, buffered direct injection, and gate modulation. A number of readout techniques have been developed to multiplex the signal and reduce the number of signal leads leaving the array. An overview is given of several readout techniques, including the CCD, MOSFET switch, CID, and CIM. Also discussed are related on-chip signal processing topics as well as questions regarding producibility and array implementation. RP SCRIBNER, DA (reprint author), USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375, USA. NR 126 TC 139 Z9 150 U1 1 U2 22 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 JAN PY 1991 VL 79 IS 1 BP 66 EP 85 DI 10.1109/5.64383 PG 20 WC Engineering, Electrical & Electronic SC Engineering GA ER586 UT WOS:A1991ER58600011 ER PT B AU CAHILL, RA ZHAO, Y MURPHY, R SALA, A FOEGH, M SPITZER, T DEEG, HJ AF CAHILL, RA ZHAO, Y MURPHY, R SALA, A FOEGH, M SPITZER, T DEEG, HJ BE SAMUELSSON, B RAMWELL, PW PAOLETTI, R FOLCO, G GRANSTROM, E TI HIGH URINARY LEUKOTRIENE-E4 (LTE4) AND THROMBOXANE-2 (TXB2) LEVELS ARE ASSOCIATED WITH CAPILLARY LEAK SYNDROME IN BONE-MARROW TRANSPLANT PATIENTS SO PROSTAGLANDINS AND RELATED COMPOUNDS, VOLS A AND B SE ADVANCES IN PROSTAGLANDIN THROMBOXANE AND LEUKOTRIENE RESEARCH LA English DT Review CT 7TH INTERNATIONAL CONF ON PROSTAGLANDINS AND RELATED COMPOUNDS CY MAY 28-JUN 01, 1990 CL FLORENCE, ITALY ID CULTURES; RAT RP CAHILL, RA (reprint author), USN,MED RES INST,BETHESDA,MD 20815, USA. OI Sala, Angelo/0000-0001-9290-0257 FU NHLBI NIH HHS [HL40069] NR 0 TC 6 Z9 6 U1 0 U2 0 PU RAVEN PRESS PI NEW YORK PA NEW YORK BN 0-88167-742-6 J9 ADV PROSTAG THROMB L PY 1991 VL 21 BP 525 EP 528 PG 4 WC Biochemistry & Molecular Biology; Medicine, Research & Experimental; Multidisciplinary Sciences SC Biochemistry & Molecular Biology; Research & Experimental Medicine; Science & Technology - Other Topics GA BS15B UT WOS:A1991BS15B00117 PM 1847564 ER PT J AU JOHNSON, LC FREEMAN, CR SPINWEBER, CL GOMEZ, SA AF JOHNSON, LC FREEMAN, CR SPINWEBER, CL GOMEZ, SA TI SUBJECTIVE AND OBJECTIVE MEASURES OF SLEEPINESS - EFFECT OF BENZODIAZEPINE AND CAFFEINE ON THEIR RELATIONSHIP SO PSYCHOPHYSIOLOGY LA English DT Article DE HUMANS; BENZODIAZEPINES; CAFFEINE; DAYTIME SLEEPINESS ID DAYTIME SLEEPINESS; NOCTURNAL SLEEP; LATENCY TEST; MOOD; RELIABILITY; PERFORMANCE; ALERTNESS; MSLT AB As part of a larger project on the effects of benzodiazepine and caffeine on daytime sleepiness, performance and mood, this study examined the relationship among the Multiple Sleep Latency Test, lapses during a tapping task, a Visual Analog Scale, and the Stanford Sleepiness scale. Subjects were 80 male, adult nonsmokers aged 20.3 +/- 2.7 years. The Multiple Sleep Latency Test, Stanford Sleepiness Scale, and the Visual Analog Scale were obtained at two-hour intervals beginning at 0700 h and ending at 1700 h. The tapping task (lapses) was administered each day at 0600 h, 1000 h, and 1400 h. A lapse was a 3-s or greater pause between taps. Correlations between the Multiple Sleep Latency Test and subjective (Visual Analog Scale and the Stanford Sleepiness Scale) measures were significant at 0600 h, but became nonsignificant as the day progressed. Correlations between lapses and the two subjective measures were generally nonsignificant. The two objective measures were significantly correlated in the total group but not in all treatment groups. The subjective measures were significantly correlated in the total sample and in each treatment group. This study reaffirms the importance of time of day when measuring sleepiness, and suggests that subjective and objective measures may measure different aspects of sleepiness. C1 UNIV CALIF SAN DIEGO,SAN DIEGO,CA 92103. RP JOHNSON, LC (reprint author), USN,HLTH RES CTR,POB 85122,SAN DIEGO,CA 92186, USA. NR 27 TC 32 Z9 32 U1 0 U2 3 PU SOC PSYCHOPHYSIOL RES PI WASHINGTON PA 1010 VERMONT AVE NW SUITE 1100, WASHINGTON, DC 20005 SN 0048-5772 J9 PSYCHOPHYSIOLOGY JI Psychophysiology PD JAN PY 1991 VL 28 IS 1 BP 65 EP 71 DI 10.1111/j.1469-8986.1991.tb03388.x PG 7 WC Psychology, Biological; Neurosciences; Physiology; Psychology; Psychology, Experimental SC Psychology; Neurosciences & Neurology; Physiology GA FR875 UT WOS:A1991FR87500007 PM 1679563 ER PT J AU GONZALEZ, RA MEHAY, SL AF GONZALEZ, RA MEHAY, SL TI BURDEN SHARING IN THE NATO ALLIANCE - AN EMPIRICAL-TEST OF ALTERNATIVE VIEWS SO PUBLIC CHOICE LA English DT Article ID MILITARY EXPENDITURES; DEFENSE C1 NAVAL POST GRAD SCH,DEPT ADM SCI,MONTEREY,CA 93943. RP GONZALEZ, RA (reprint author), CALIF STATE UNIV,DEPT ECON,SAN JOSE,CA 95192, USA. NR 20 TC 6 Z9 6 U1 1 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0048-5829 J9 PUBLIC CHOICE JI Public Choice PD JAN PY 1991 VL 68 IS 1-3 BP 107 EP 116 PG 10 WC Economics; Political Science SC Business & Economics; Government & Law GA EU367 UT WOS:A1991EU36700007 ER PT J AU MITSUDA, K DOTANI, T YOSHIDA, A VAUGHAN, B NORRIS, JP AF MITSUDA, K DOTANI, T YOSHIDA, A VAUGHAN, B NORRIS, JP TI RELATION BETWEEN THE QUASI-PERIODIC OSCILLATIONS AND THE LOW-FREQUENCY NOISE OF GX 5-1 IN THE HORIZONTAL BRANCH SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN LA English DT Article DE ACCRETION; QUASI-PERIODIC OSCILLATIONS; X-RAY BINARIES ID X-RAY SOURCES; CROSS-SPECTRA; CYGNUS X-2; GX5-1; QPO AB Ginga observations of quasi-periodic oscillations (QPO) and the low-frequency noise (LFN) from GX 5-1 in its horizontal-branch spectral state are presented. Power spectral fits were attempted using model functions based on simple oscillating shot models. In order to obtain acceptable fits, separate life distribution functions are necessary in the shot models representing QPO and LFN. Furthermore, a larger amplitude of shots is necessary for QPO than for LFN for the longer lifetime shots. A clear second-harmonic peak of QPO was detected. Variations in the powers of QPO and LFN on timescales of 8-256 were also studied. These variations were significant for all of the timescales studied, and were uncorrelated with each other on timescales shorter than a few tens of seconds, and correlated on longer timescales. From simulations based on a simple shot model, it was found that the variation amplitude and the lack of correlation on short timescales are not inconsistent with the oscillating shot models. A more complex model is necessary to fully explain the observed properties. C1 STANFORD UNIV,DEPT PHYS,STANFORD,CA 94305. USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. RP MITSUDA, K (reprint author), INST SPACE & ASTRONAUT SCI,1-1 YOSHINODAI 3 CHOME,SAGAMIHARA,KANAGAWA 229,JAPAN. RI Mitsuda, Kazuhisa/C-2649-2008 NR 17 TC 5 Z9 5 U1 0 U2 0 PU ASTRONOMICAL SOC JAPAN PI TOKYO PA C/O NATIONAL ASTRONOM OBSERV MITAKA-SHI, TOKYO 181, JAPAN SN 0004-6264 J9 PUBL ASTRON SOC JPN JI Publ. Astron. Soc. Jpn. PY 1991 VL 43 IS 1 BP 113 EP 130 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA FH413 UT WOS:A1991FH41300007 ER PT J AU JACOBS, VL AF JACOBS, VL TI INTRODUCTION TO THE SUBJECT OF COHERENT RADIATION PROCESSES IN STRONG FIELDS SO RADIATION EFFECTS AND DEFECTS IN SOLIDS LA English DT Editorial Material RP JACOBS, VL (reprint author), USN,RES LAB,DIV CONDENSED MATTER & RADIAT SCI,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 1042-0150 J9 RADIAT EFF DEFECT S JI Radiat. Eff. Defects Solids PY 1991 VL 122 BP 3 EP 24 DI 10.1080/10420159108220496 PN 1 PG 22 WC Nuclear Science & Technology; Physics, Fluids & Plasmas; Physics, Condensed Matter SC Nuclear Science & Technology; Physics GA HN188 UT WOS:A1991HN18800002 ER PT J AU FUSINA, R AF FUSINA, R TI LINEAR-POLARIZATION OF CHANNELING RADIATION FROM AXIALLY CHANNELED ELECTRONS SO RADIATION EFFECTS AND DEFECTS IN SOLIDS LA English DT Article; Proceedings Paper CT 1ST INTERNATIONAL CONF ON COHERENT RADIATION PROCESSES IN STRONG FIELDS CY JUN 18-22, 1990 CL CATHOLIC UNIV AMER, WASHINGTON, DC SP CATHOLIC UNIV AMER, USN, NAVAL RES LAB, USN, OFF NAVAL RES HO CATHOLIC UNIV AMER ID CHARGED-PARTICLES RP FUSINA, R (reprint author), USN,RES LAB,DIV CONDENSED MATTER & RADIAT SCI,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 1042-0150 J9 RADIAT EFF DEFECT S JI Radiat. Eff. Defects Solids PY 1991 VL 122 BP 365 EP 380 DI 10.1080/10420159108220510 PN 1 PG 16 WC Nuclear Science & Technology; Physics, Fluids & Plasmas; Physics, Condensed Matter SC Nuclear Science & Technology; Physics GA HN188 UT WOS:A1991HN18800016 ER PT J AU JACOBS, VL FUSINA, R SAENZ, AW UBERALL, H AF JACOBS, VL FUSINA, R SAENZ, AW UBERALL, H TI COHERENT RADIATION PROCESSES IN STRONG FIELDS - PROCEEDINGS OF THE 1ST INTERNATIONAL-CONFERENCE, CONVENED AT THE CATHOLIC-UNIVERSITY-OF-AMERICA, WASHINGTON, DC, JUNE 18-22, 1990 - PREFACE SO RADIATION EFFECTS AND DEFECTS IN SOLIDS LA English DT Editorial Material C1 CATHOLIC UNIV AMER,DEPT PHYS,WASHINGTON,DC 20064. RP JACOBS, VL (reprint author), USN,RES LAB,DIV CONDENSED MATTER & RADIAT SCI,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 1042-0150 J9 RADIAT EFF DEFECT S JI Radiat. Eff. Defects Solids PY 1991 VL 122 BP R5 EP R6 PN 1 PG 2 WC Nuclear Science & Technology; Physics, Fluids & Plasmas; Physics, Condensed Matter SC Nuclear Science & Technology; Physics GA HN188 UT WOS:A1991HN18800001 ER PT J AU WINTERSGILL, MC AF WINTERSGILL, MC TI DIELECTRIC-SPECTROSCOPY OF IONIC SOLIDS SO RADIATION EFFECTS AND DEFECTS IN SOLIDS LA English DT Article ID ALKALINE-EARTH FLUORIDES; DOPED CALCIUM-FLUORIDE; CLUSTER-ASSOCIATED RELAXATIONS; CUBIC LEAD FLUORIDE; ACTIVATION VOLUMES; LASER SPECTROSCOPY; DEFECT EQUILIBRIA; CONDUCTIVITY; KCL-SM-2+; MOTION RP WINTERSGILL, MC (reprint author), USN ACAD, DEPT PHYS, ANNAPOLIS, MD 21402 USA. NR 36 TC 1 Z9 1 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1042-0150 J9 RADIAT EFF DEFECT S JI Radiat. Eff. Defects Solids PY 1991 VL 119 BP 217 EP 222 DI 10.1080/10420159108224878 PN 1 PG 6 WC Nuclear Science & Technology; Physics, Fluids & Plasmas; Physics, Condensed Matter SC Nuclear Science & Technology; Physics GA HP343 UT WOS:A1991HP34300035 ER PT B AU ROLAND, CM ARMISTEAD, JP SONNENSCHEIN, MF AF ROLAND, CM ARMISTEAD, JP SONNENSCHEIN, MF BE CLOUGH, RL SHALABY, SW TI THERMAL MARKING OF AMORPHOUS POLY(ETHYLENE-TEREPHTHALATE) SO RADIATION EFFECTS ON POLYMERS SE ACS SYMPOSIUM SERIES LA English DT Review CT SYMP AT THE 200TH NATIONAL MEETING OF THE AMERICAN CHEMICAL SOC : RADIATION EFFECTS ON POLYMERS CY AUG 26-31, 1990 CL WASHINGTON, DC SP AMER CHEM SOC ID PHOTOCHEMICAL DEGRADATION; POLY(METHYL METHACRYLATE); POLYMER SURFACES; LASER MARKING; FILMS; POLY(ETHYLENE-TEREPHTHALATE); MICROLITHOGRAPHY; POLYCARBONATE; IRRADIATION; RADIATION RP ROLAND, CM (reprint author), USN,RES LAB,DIV CHEM,CODE 6120,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA WASHINGTON BN 0-8412-2165-0 J9 ACS SYM SER PY 1991 VL 475 BP 343 EP 363 PG 21 WC Physics, Atomic, Molecular & Chemical; Polymer Science SC Physics; Polymer Science GA BU84P UT WOS:A1991BU84P00021 ER PT J AU BRYDEN, HL AF BRYDEN, HL TI RECENT PROGRESS IN STRAIT DYNAMICS SO REVIEWS OF GEOPHYSICS LA English DT Review ID WESTERN ALBORAN SEA; MAXIMAL 2-LAYER EXCHANGE; NONLINEAR INTERNAL WAVES; HYDRAULIC CONTROL; MEDITERRANEAN WATER; CHANNEL FLOW; GENERATION MECHANISM; OBSERVATORY INLET; ROTATING-CHANNEL; SURFACE OUTFLOW AB A major change in the understanding of the dynamics of flow through straits has occurred over the last few years with the development of two layer hydraulic control models and their application to new observations in the Strait of Gibraltar. Observations of the flow through the Strait of Gibraltar suggest that there are at least two locations of critical flow where the Froude number equals one, at the sill and at the narrowest section of the Strait, as required by hydraulic theory for maximal exchange through the Strait. Predictions of the inflow and outflow transports and the salinity difference between them from hydraulic theory are in agreement with the recent observations. The physical configuration of the Strait of Gibraltar does indeed appear to control the amount of exchange between the Mediterranean and Atlantic basins. New observational techniques utilized in the Gibraltar Experiment have dramatically portrayed the physical processes operating in the two layer exchange. Acoustic backscatter and Doppler current profiling have characterized hydraulic jumps and mixing, bore formation and propagation of internal solitary wave packets as no conventional measurements have done before. Time series current and, most importantly, salinity measurements on moorings have led to quantitative estimates of the inflow and outflow transports far superior to historical measurements. The new transports throught the Strait of Gibralter are 30% smaller than historical estimates and, furthermore, tidal oscillations contribute nearly half of the total transport. Microstructure measurements have allowed regions of intense mixing in the Strait to be identified and the amount of mixing to be quantified. Finally the first conclusive evidence of the direct aspiration of deep water up and over a sill has been found in nearly all time series CTD stations at the Gibraltar sill. In this progress report and review, hydraulic control theory and Gibraltar observations are discussed. Then the effects of strait flows on the circulation in the adjoining seas and results from studies of other straits are described. Following a discussion on the generation and propagation of solitary waves in straits, a brief summary and list of outstanding problems are presented, with particular emphasis on the need to develop a fully time-dependent hydraulic theory for the exchange through a strait. C1 USN ACAD, ANNAPOLIS, MD 21402 USA. RP BRYDEN, HL (reprint author), WOODS HOLE OCEANOG INST, WOODS HOLE, MA 02543 USA. NR 151 TC 38 Z9 38 U1 0 U2 6 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 8755-1209 J9 REV GEOPHYS JI Rev. Geophys. PY 1991 VL 29 SU S BP 617 EP 631 PN 2 PG 15 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA FX962 UT WOS:A1991FX96200017 ER PT J AU SHEELEY, NR AF SHEELEY, NR TI PHOTOSPHERIC AND CORONAL MAGNETIC-FIELDS SO REVIEWS OF GEOPHYSICS LA English DT Review ID SOLAR-WIND SPEED; NORTH-SOUTH ASYMMETRY; TORSIONAL OSCILLATIONS; DIFFERENTIAL ROTATION; SUNSPOT CYCLE-21; ACTIVE REGIONS; RIGID ROTATION; ENERGY-FLOW; FLUX TUBES; QUIET SUN RP SHEELEY, NR (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 102 TC 1 Z9 1 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 8755-1209 J9 REV GEOPHYS JI Rev. Geophys. PY 1991 VL 29 SU S BP 925 EP 931 PN 2 PG 7 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA FX962 UT WOS:A1991FX96200046 ER PT J AU OLDFIELD, EC WALLACE, MR HYAMS, KC YOUSIF, AA LEWIS, DE BOURGEOIS, AL AF OLDFIELD, EC WALLACE, MR HYAMS, KC YOUSIF, AA LEWIS, DE BOURGEOIS, AL TI ENDEMIC INFECTIOUS-DISEASES OF THE MIDDLE-EAST SO REVIEWS OF INFECTIOUS DISEASES LA English DT Review ID UNITED-STATES-ARMY; NON-B HEPATITIS; CRIMEAN HEMORRHAGIC-FEVER; GRAM-NEGATIVE BACILLI; URINARY SALMONELLA CARRIERS; TOXIGENIC ESCHERICHIA-COLI; SAUDI-ARABIA; CUTANEOUS LEISHMANIASIS; TYPHOID-FEVER; VIRAL-HEPATITIS C1 USN HOSP,DIV INFECT DIS,SAN DIEGO,CA 92134. SALMANIYA MED CTR,MANAMA,BAHRAIN. NAVAL MED RES UNIT 3,CAIRO,EGYPT. NR 166 TC 53 Z9 53 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0162-0886 J9 REV INFECT DIS PD JAN-FEB PY 1991 VL 13 SU 3 BP S199 EP S217 PG 19 WC Immunology; Microbiology SC Immunology; Microbiology GA EW258 UT WOS:A1991EW25800001 PM 1901665 ER PT J AU LOONEY, RE AF LOONEY, RE TI EMPLOYMENT PATTERNS IN A CAPITAL-RICH, LABOR-POOR COUNTRY - QATAR AS A CASE-STUDY SO REVUE CANADIENNE D ETUDES DU DEVELOPPEMENT-CANADIAN JOURNAL OF DEVELOPMENT STUDIES LA English DT Article RP LOONEY, RE (reprint author), USN,POSTGRAD SCH,MONTEREY,CA 93940, USA. NR 14 TC 0 Z9 0 U1 0 U2 0 PU INST INT DEV CO-OP PI OTTAWA PA UNIV OTTAWA 25 UNIVERSITE, OTTAWA ON K1N 6N5, CANADA SN 0225-5189 J9 REV CAN ETUD DEV JI Rev. Can. Etud. Dev.-Can. J. Dev. Stud. PY 1991 VL 12 IS 1 BP 107 EP 121 PG 15 WC Planning & Development SC Public Administration GA FT931 UT WOS:A1991FT93100006 ER PT J AU KILPATRICK, M GIRGIS, N FARID, Z BISHAY, E AF KILPATRICK, M GIRGIS, N FARID, Z BISHAY, E TI AZTREONAM FOR TREATING MENINGITIS CAUSED BY GRAM-NEGATIVE RODS SO SCANDINAVIAN JOURNAL OF INFECTIOUS DISEASES LA English DT Note AB 10 patients with meningitis due to unusual gram-negative organisms (Pseudomonas, Proteus, Salmonella and Klebsiella) were effectively treated with aztreonam. A detailed history and a thorough physical examination combined with careful laboratory testing resulted in accurate diagnosis and cure of all patients. C1 ABBASSIA FEVER HOSP,MINIST HLTH,CAIRO,EGYPT. USN,MED RES UNIT 3,CAIRO,EGYPT. NR 5 TC 5 Z9 5 U1 0 U2 0 PU SCANDINAVIAN UNIVERSITY PRESS PI OSLO PA PO BOX 2959 TOYEN, JOURNAL DIVISION CUSTOMER SERVICE, N-0608 OSLO, NORWAY SN 0036-5548 J9 SCAND J INFECT DIS JI Scand. J. Infect. Dis. PY 1991 VL 23 IS 1 BP 125 EP 126 DI 10.3109/00365549109023387 PG 2 WC Infectious Diseases SC Infectious Diseases GA EX746 UT WOS:A1991EX74600021 PM 2028226 ER PT J AU GURSKY, H FRITZ, G AF GURSKY, H FRITZ, G TI PROBLEMS OF LOW-LIGHT DETECTION IN REAL-TIME AT HIGH-RESOLUTION SO SCANNING LA English DT Article ID CCD AB Various kinds of low-light-level detectors and image intensifiers are described and specific charge-coupled device (CCD) developments are discussed from the perspective of the astronomical community, with possible application to optical microscopy. A number of research groups are reporting success at obtaining custom CCDs for application to high-quality cameras working at low-light levels. CCDs offer significant advantages in image quality and sensitivity compared with more traditional devices. Signal to noise (S/N) is derived for both CCDs and intensified devices. There is a tradeoff between the two and, because of the high read-out rate required by microscopists, intensified devices still offer a S/N advantage at the lowest light levels. RP GURSKY, H (reprint author), USN,RES LAB,DIV SPACE SCI,WASHINGTON,DC 20375, USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU FAMS INC PI MAHWAH PA BOX 832, MAHWAH, NJ 07430 SN 0161-0457 J9 SCANNING JI Scanning PD JAN-FEB PY 1991 VL 13 IS 1 BP 41 EP 46 PG 6 WC Instruments & Instrumentation; Microscopy SC Instruments & Instrumentation; Microscopy GA EW351 UT WOS:A1991EW35100008 ER PT J AU JONES, HN AF JONES, HN TI PLASTIC-DEFORMATION BURST AND ARREST PHENOMENA IN RAPIDLY HEATED INCONEL X UNDER DEAD WEIGHT LOADING 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 11 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 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD JAN PY 1991 VL 25 IS 1 BP 201 EP 206 DI 10.1016/0956-716X(91)90381-A PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA EQ988 UT WOS:A1991EQ98800039 ER PT J AU FARE, TL RUSIN, KM BEY, PP AF FARE, TL RUSIN, KM BEY, PP TI LANGMUIR-BLODGETT DEPOSITED VALINOMYCIN PHOSPHOLIPID FILMS ON PLATINUM - AN AC IMPEDANCE RESPONSE TO POTASSIUM SO SENSORS AND ACTUATORS B-CHEMICAL LA English DT Article ID MEMBRANES AB Multilayers of phospholipid and valinomycin films are deposited onto platinum electrodes using the Langmuir-Blodgett technique. The pressure-area isotherms of the mixed lipid and valinomycin monolayers have been used to characterize the films prior to deposition. Coverage of platinum surfaces by the deposited layers is determined using an a.c. electrical impedance technique. The stability of the monolayer, lipid adhesion onto the platinum surface and the surface pressure are parameters that prove to be critical for obtaining high-impedance electrode coatings. Film deposition is carried out for high and low ionic strength subphases at neutral pH. Films deposited at surface pressures of 45 mN m-1 have an impedance on the order of that of artificial bilayer lipid membranes. The film impedance on the platinum electrodes is measured as a function of the potassium concentration. The film impedance decreases when potassium is added to the subphase. Conductance changes induced by the potassium are used to evaluate the percentage uptake of potassium by valinomycin. Mechanisms for the electrical response of the film are discussed in terms of adsorption models. C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. RP FARE, TL (reprint author), USN,RES LAB,CTR BIOMOLEC SCI & ENGN,CODE 6090,WASHINGTON,DC 20375, USA. NR 14 TC 17 Z9 17 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-4005 J9 SENSOR ACTUAT B-CHEM JI Sens. Actuator B-Chem. PD JAN PY 1991 VL 3 IS 1 BP 51 EP 62 DI 10.1016/0925-4005(91)85007-6 PG 12 WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation SC Chemistry; Electrochemistry; Instruments & Instrumentation GA FA330 UT WOS:A1991FA33000007 ER PT J AU CRONAN, TA CONWAY, TL KASZAS, SL AF CRONAN, TA CONWAY, TL KASZAS, SL TI STARTING TO SMOKE IN THE NAVY - WHEN, WHERE AND WHY SO SOCIAL SCIENCE & MEDICINE LA English DT Article; Proceedings Paper CT SESSION AT THE 1988 ANNUAL MEETING OF THE AMERICAN ANTHROPOLOGICAL ASSOC : THE USE AND DISUSE OF CIGARETTE TOBACCO CY 1988 CL PHOENIX, AZ SP AMER ANTHR ASSOC DE SMOKING; MILITARY; PREVALENCE; REASONS ID COTININE AB Smoking rates among U.S. military men are much higher than those in the general population. A previous study compared the smoking rates of male recruits coming into the Navy with those of a shipboard sample to find out whether the Navy was attracting or creating smokers. Twenty-eight percent of the incoming recruits were smokers, whereas 50% of the shipboard men were smokers. These findings suggested that the Navy environment somehow encouraged smoking. The present study followed a group of male recruits for one year after they entered the Navy to determine when, where, and why they started smoking during their first year in the service. Two hundred and sixty-two of the original 682 participants returned the one-year follow-up information. Twenty-eight percent of the sample were self-reported smokers upon entry into the Navy. One year later 41% classified themselves as smokers. Of those who started smoking (either for the first time or again after having quit) during their first year, 42% started within their first two months of service (i.e. during recruit training), and another 32% started during their third month in the Navy. In addition to the 42% who started during recruit training, 39% started while attending training school, and 15% started while stationed aboard a ship during their first year in the Navy. The most frequently cited reasons for starting to smoke were: curiosity, friends smoking, calming effect, and wanted to be 'cool'. Because many individuals begin smoking soon after joining the Navy, effective prevention programs need to be implemented in recruit training and repeated in early training schools. C1 USN,HLTH RES CTR,SAN DIEGO,CA 92138. RP CRONAN, TA (reprint author), SAN DIEGO STATE UNIV,DEPT PSYCHOL,SAN DIEGO,CA 92182, USA. NR 15 TC 32 Z9 32 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0277-9536 J9 SOC SCI MED JI Soc. Sci. Med. PY 1991 VL 33 IS 12 BP 1349 EP 1353 DI 10.1016/0277-9536(91)90278-K PG 5 WC Public, Environmental & Occupational Health; Social Sciences, Biomedical SC Public, Environmental & Occupational Health; Biomedical Social Sciences GA HA046 UT WOS:A1991HA04600005 PM 1776048 ER PT J AU LOONEY, RE FREDERIKSEN, PC AF LOONEY, RE FREDERIKSEN, PC TI THE DECLINING EFFECTIVENESS OF MEXICAN FISCAL-POLICY SO SOCIO-ECONOMIC PLANNING SCIENCES LA English DT Article C1 NAVAL POST GRAD SCH,CTR DEF RESOURCES MANAGEMENT EDUC,MONTEREY,CA 93943. RP LOONEY, RE (reprint author), NAVAL POST GRAD SCH,NATL SECUR AFFAIRS,MONTEREY,CA 93943, USA. NR 8 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 0038-0121 J9 SOCIO ECON PLAN SCI JI Socio-Econ. Plan. Sci. PY 1991 VL 25 IS 1 BP 49 EP 53 DI 10.1016/0038-0121(91)90028-P PG 5 WC Economics; Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA FH428 UT WOS:A1991FH42800005 ER PT J AU SHEELEY, NR WANG, YM AF SHEELEY, NR WANG, YM TI MAGNETIC-FIELD CONFIGURATIONS ASSOCIATED WITH FAST SOLAR-WIND SO SOLAR PHYSICS LA English DT Article ID EXTREME-ULTRAVIOLET OBSERVATIONS; POLAR CORONAL HOLES; IPS OBSERVATIONS; RIGID ROTATION; CYCLE; EVOLUTION; STREAMS; SPEED AB In this paper, we consider the implications of the observed inverse correlation between solar wind speed at Earth and the expansion rate of the Sun-Earth flux tube as it passes through the corona. We find that the coronal expansion rate depends critically on the large-scale photospheric field distribution around the footpoint of the flux tube, with the smallest expansions occuring in tubes that are rooted near a local minimum in the field. This suggests that the fastest wind streams originate from regions where large coronal holes are about to break apart and from the facing edges of adjacent like-polarity holes, whose field lines converge as they transit the corona. These ideas lead to the following predictions: (1) Weak holes and fragmentary holes can be sources of very fast wind. (2) Fast wind with steep latitudinal gradients may be generated where the field lines from the polar hole and a lower-latitude hole of like polarity converge to form a mid-latitude 'apex'. (3) The fastest polar wind should occur shortly after sunspot maximum, when trailing-polarity flux converges onto the poles and begins to establish the new polar fields. RP SHEELEY, NR (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 37 TC 20 Z9 20 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0038-0938 J9 SOL PHYS JI Sol. Phys. PD JAN PY 1991 VL 131 IS 1 BP 165 EP 186 DI 10.1007/BF00151752 PG 22 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EW070 UT WOS:A1991EW07000014 ER PT J AU PAVLOPOULOS, TG AF PAVLOPOULOS, TG TI TRIPLET TRIPLET ABSORPTION AND POLARIZATION SPECTRA OF ANTHRACENE SO SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY LA English DT Note RP PAVLOPOULOS, TG (reprint author), USN,CTR OCEAN SYST,DEPT MARINE SCI & TECHNOL,SAN DIEGO,CA 92152, USA. NR 11 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 0584-8539 J9 SPECTROCHIM ACTA A JI Spectroc. Acta Pt. A-Molec. Biomolec. Spectr. PY 1991 VL 47 IS 3-4 BP 517 EP 518 DI 10.1016/0584-8539(91)80131-2 PG 2 WC Spectroscopy SC Spectroscopy GA FE447 UT WOS:A1991FE44700023 ER PT J AU JAGANATHAN, J EWING, KJ PEITERSON, LE OBRIEN, EA AGGARWAL, ID AF JAGANATHAN, J EWING, KJ PEITERSON, LE OBRIEN, EA AGGARWAL, ID TI DETERMINATION OF TRACE LEVELS OF IRON AND COBALT IN ZIRCONIUM FLUORIDE USING GRAPHITE-FURNACE ATOMIC-ABSORPTION SPECTROMETRY SO SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY LA English DT Note ID FIBERS C1 USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375. NR 5 TC 6 Z9 6 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0584-8547 J9 SPECTROCHIM ACTA B JI Spectroc. Acta Pt. B-Atom. Spectr. PY 1991 VL 46 IS 5 BP 669 EP 671 DI 10.1016/0584-8547(91)80069-F PG 3 WC Spectroscopy SC Spectroscopy GA FK954 UT WOS:A1991FK95400010 ER PT J AU GLEMBOCKI, OJ SNOW, ES LITTLE, RW LEAVITT, RP AF GLEMBOCKI, OJ SNOW, ES LITTLE, RW LEAVITT, RP TI ELECTROREFLECTANCE STUDIES OF ASYMMETRICALLY COUPLED QUANTUM-WELLS SO SUPERLATTICES AND MICROSTRUCTURES LA English DT Article ID PHOTOREFLECTANCE; TEMPERATURE; DEPENDENCE C1 MARTIN MARIETTA CORP LABS,BALTIMORE,MD 21227. RP GLEMBOCKI, OJ (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 11 TC 6 Z9 6 U1 0 U2 2 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0749-6036 J9 SUPERLATTICE MICROST JI Superlattices Microstruct. PY 1991 VL 10 IS 1 BP 77 EP 82 DI 10.1016/0749-6036(91)90152-H PG 6 WC Physics, Condensed Matter SC Physics GA FZ178 UT WOS:A1991FZ17800015 ER PT J AU PROKES, SM GLEMBOCKI, OJ WANG, KL AF PROKES, SM GLEMBOCKI, OJ WANG, KL TI OPTICAL AND STRUCTURAL STUDIES OF RELAXATION IN SI1-XGE/SI STRAINED LAYER SUPERLATTICES SO SUPERLATTICES AND MICROSTRUCTURES LA English DT Article ID HETEROJUNCTION BIPOLAR-TRANSISTORS; MOLECULAR-BEAM EPITAXY; X-RAY; SILICON; INTERDIFFUSION; DIFFUSION C1 UNIV CALIF LOS ANGELES,DEPT ELECT ENGN,LOS ANGELES,CA 90024. RP PROKES, SM (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 17 TC 0 Z9 0 U1 0 U2 0 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0749-6036 J9 SUPERLATTICE MICROST JI Superlattices Microstruct. PY 1991 VL 10 IS 1 BP 113 EP 118 DI 10.1016/0749-6036(91)90158-N PG 6 WC Physics, Condensed Matter SC Physics GA FZ178 UT WOS:A1991FZ17800021 ER PT B AU LITTLE, BJ SIKES, CS AF LITTLE, BJ SIKES, CS BE SIKES, CS WHEELER, AP TI CORROSION INHIBITION BY THERMAL POLYASPARTATE SO SURFACE REACTIVE PEPTIDES AND POLYMERS: DISCOVERY AND COMMERCIALIZATION SE ACS SYMPOSIUM SERIES LA English DT Proceedings Paper CT SYMP AT THE 197TH NATIONAL MEETING OF THE AMERICAN CHEMICAL SOC - SURFACE REACTIVE PEPTIDES AND POLYMERS : DISCOVERY AND COMMERCIALIZATION CY APR 12-13, 1989 CL DALLAS, TX SP AMER CHEM SOC, DIV IND & ENGN CHEM ID BEHAVIOR RP LITTLE, BJ (reprint author), USN,OCEANOG & ATMOSPHER RES LAB,STENNIS SPACE CTR,MS 39529, USA. NR 0 TC 5 Z9 5 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA WASHINGTON BN 0-8412-1886-2 J9 ACS SYM SER PY 1991 VL 444 BP 263 EP 279 PG 17 WC Biochemistry & Molecular Biology; Chemistry, Applied SC Biochemistry & Molecular Biology; Chemistry GA BS51H UT WOS:A1991BS51H00021 ER PT J AU MCGONIGAL, M BERMUDEZ, VM AF MCGONIGAL, M BERMUDEZ, VM TI INFRARED REFLECTION ABSORPTION-SPECTROSCOPY STUDY OF CHEMISORPTION ON THE NI(001)-C(2X2)SI SURFACE SO SURFACE SCIENCE LA English DT Article ID ENERGY-LOSS SPECTROSCOPY; ELECTRONIC-STRUCTURE; INITIAL-STAGES; OXIDATION; ADSORPTION; SILICIDES; SI(111); DECOMPOSITION; NI(100); SI(100) AB Infrared reflection-absorption spectroscopy has been used to study the oxidation chemistry of Si atoms adsorbed on Ni(001) in a c(2 x 2) structure. Water (H2O, D2O) and oxygen ((O2)-O-16, (O2)-O-18) were used as the oxidizing species and the effects of variation in Si coverage (from the c(2 x 2) value of 0.5 monolayers) and of annealing, following adsorption near 300 K, were investigated. H2O adsorbs dissociatively, giving Si-OH stretching and Si-O-H bending modes at 1015 and 800 cm-1, respectively. There are, however, no detectable Si-H vibrations for exposure either to H2O or to H2 excited by a hot filament. The Si-OH stretch lies about 230 cm-1 higher in energy on c(2 x 2)Si than on elemental Si, indicating a substantial influence of the metallic environment on the Si-OH bond. O2 exposure leads to two types of bridging species - one giving bands at about 1090 and 830 cm-1 and another giving a band at about 990 cm-1. Based in part on the correlation between Si coverage and band relative intensities, these are assigned to Si-O-Si and Si-O-Ni bridges, respectively. Annealing leads to structural rearrangement of the surface layers, ultimately giving a spectrum resembling that for a thin SiO2 film on a metal. RP MCGONIGAL, M (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 32 TC 8 Z9 8 U1 3 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD JAN PY 1991 VL 241 IS 3 BP 357 EP 368 DI 10.1016/0039-6028(91)90096-B PG 12 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA EX943 UT WOS:A1991EX94300014 ER PT J AU ZECH, ER SIMMONS, LB KENDRICK, RR SOBALLE, PW OLCESE, JAM GOFF, WB LAWRENCE, DP DEWEESE, RA AF ZECH, ER SIMMONS, LB KENDRICK, RR SOBALLE, PW OLCESE, JAM GOFF, WB LAWRENCE, DP DEWEESE, RA TI CHOLECYSTOKININ ENHANCED HEPATOBILIARY SCANNING WITH EJECTION FRACTION CALCULATION AS AN INDICATOR OF DISEASE OF THE GALLBLADDER SO SURGERY GYNECOLOGY & OBSTETRICS LA English DT Article ID CHOLECYSTOGRAPHY; CHOLECYSTITIS; CHOLESCINTIGRAPHY; DIAGNOSIS AB Chronic acalculous cholecystitis represents 5 to 20 per cent of electively treated diseases of the gallbladder. A 70 per cent success rate in relieving these patients of chronic pain was reported when surgical treatment was recommended based on symptoms alone. The cholecystokinin ejection fraction, which is a quantitative measure of emptying of the gallbladder, was 95 per cent accurate in predicting which patients would be relieved of symptoms by surgical treatment. In this study, we report our consecutive experience during a 20 month period with 83 patients. C1 USN HOSP,DEPT SURG,CHARLESTON,SC. USN HOSP,DEPT RADIOL,CHARLESTON,SC. NR 18 TC 45 Z9 45 U1 0 U2 0 PU FRANKLIN H MARTIN FOUNDATION PI CHICAGO PA 55 E ERIE ST, CHICAGO, IL 60611 SN 0039-6087 J9 SURG GYNECOL OBSTET JI Surg. Gynecol. Obstet. PD JAN PY 1991 VL 172 IS 1 BP 21 EP 24 PG 4 WC Obstetrics & Gynecology; Surgery SC Obstetrics & Gynecology; Surgery GA EQ563 UT WOS:A1991EQ56300005 PM 1985336 ER PT J AU NELSON, KA ADOLPH, HG AF NELSON, KA ADOLPH, HG TI ULLMANN REACTION OF PICRYL BROMIDE IN THE PRESENCE OF ULTRASOUND SO SYNTHETIC COMMUNICATIONS LA English DT Article AB Ultrasonic irradiation was found to promote the Ullmann coupling of picryl bromide at or below room temperature. In the presence of excess copper, a long-lived intermediate is formed that is quenched upon work-up affording variable mixtures of trinitrobenzene and picric acid. C1 USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903. GEOCENTERS INC,FT WASHINGTON,MD 20744. NR 15 TC 4 Z9 4 U1 0 U2 2 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0039-7911 J9 SYNTHETIC COMMUN JI Synth. Commun. PY 1991 VL 21 IS 2 BP 293 EP 305 DI 10.1080/00397919108020824 PG 13 WC Chemistry, Organic SC Chemistry GA FH945 UT WOS:A1991FH94500020 ER PT J AU ROLISON, DR NOWAK, RJ WELSH, TA MURRAY, CG AF ROLISON, DR NOWAK, RJ WELSH, TA MURRAY, CG TI ANALYTICAL IMPLICATIONS OF ZEOLITES IN OVERLAYERS AT ELECTRODES SO TALANTA LA English DT Article ID ELECTROCHEMICAL-BEHAVIOR; MOLECULAR-SIEVES; POLYANILINE; INCLUSION AB A review is given of past and potential analytical and other applications of electrodes overlayered with zeolites. RP ROLISON, DR (reprint author), USN,RES LAB,SURFACE CHEM BRANCH,CODE 6170,WASHINGTON,DC 20375, USA. NR 36 TC 73 Z9 73 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-9140 J9 TALANTA JI Talanta PD JAN PY 1991 VL 38 IS 1 BP 27 EP 35 DI 10.1016/0039-9140(91)80006-L PG 9 WC Chemistry, Analytical SC Chemistry GA EV497 UT WOS:A1991EV49700004 PM 18965102 ER PT J AU BARLAT, F VASUDEVAN, AK AF BARLAT, F VASUDEVAN, AK TI INFLUENCE OF PRECIPITATE MICROSTRUCTURE ON FLOW AND FORMING PROPERTIES OF A 7075 ALUMINUM-ALLOY SHEET SO TEXTURES AND MICROSTRUCTURES LA English DT Article; Proceedings Paper CT 9TH INTERNATIONAL CONF ON TEXTURES OF MATERIALS CY SEP 17-21, 1990 CL AVIGNON, FRANCE ID DEFORMATION; BEHAVIOR C1 USN,OFF NAVAL RES,ARLINGTON,VA 22217. RP BARLAT, F (reprint author), ALCOA LABS,ALCOA CTR,PA 15069, USA. NR 13 TC 0 Z9 0 U1 0 U2 1 PU GORDON BREACH SCI PUBL LTD PI READING PA C/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0730-3300 J9 TEXTURE MICROSTRUCT JI Textures Microstruct. PY 1991 VL 14 BP 1025 EP 1030 DI 10.1155/TSM.14-18.1025 PN 5 PG 6 WC Crystallography; Materials Science, Multidisciplinary SC Crystallography; Materials Science GA HJ594 UT WOS:A1991HJ59400014 ER PT J AU KRAGEL, PJ DELVECCHIO, D ORLANDO, R GARVIN, DF AF KRAGEL, PJ DELVECCHIO, D ORLANDO, R GARVIN, DF TI ULTRASONOGRAPHIC FINDINGS OF TESTICULAR MICROLITHIASIS ASSOCIATED WITH INTRATUBULAR GERM-CELL NEOPLASIA SO UROLOGY LA English DT Article ID CARCINOMA-INSITU; TESTIS AB Testicular microlithiasis is an uncommon condition in which calcified concretions fill the lumina of seminiferous tubules. We report the case of a twenty-three-year-old white man with a metastatic germ cell tumor and normal findings on testicular physical examination, but abnormal ultrasonography of the right testis. Orchiectomy revealed intratubular germ cell neoplasia with testicular microlithiasis. Multiple circular echogenic foci on ultrasound correlated with the histologic finding of testicular microlithiasis. Further studies are indicated for assessing ultrasonography as an adjunct for screening the population at risk for intratubular germ cell neoplasia. C1 USN HOSP,DEPT PATHOL,BETHESDA,MD. USN HOSP,DEPT UROL,BETHESDA,MD. NR 9 TC 49 Z9 49 U1 0 U2 0 PU CAHNERS PUBL CO PI NEW YORK PA 249 WEST 17 STREET, NEW YORK, NY 10011 SN 0090-4295 J9 UROLOGY JI UROLOGY PD JAN PY 1991 VL 37 IS 1 BP 66 EP 68 DI 10.1016/0090-4295(91)80081-H PG 3 WC Urology & Nephrology SC Urology & Nephrology GA ET863 UT WOS:A1991ET86300013 PM 1846052 ER PT J AU HALL, JK SPECTOR, PE AF HALL, JK SPECTOR, PE TI RELATIONSHIPS OF WORK STRESS MEASURES FOR EMPLOYEES WITH THE SAME JOB SO WORK AND STRESS LA English DT Article DE ROLE CONFLICT; ROLE AMBIGUITY; WORKLOAD; JOB SATISFACTION; HEALTH ID SATISFACTION; OUTCOMES; HEALTH C1 UNIV S FLORIDA,DEPT PSYCHOL,TAMPA,FL 33620. RP HALL, JK (reprint author), USN,CTR TRAINING SYST,OAK RIDGE ASSOCIATED UNIV POST DOCTORAL RES PROGRAM,12350 RES PKWY,ORLANDO,FL 32826, USA. OI Spector, Paul E./0000-0002-6881-8496 NR 16 TC 12 Z9 12 U1 0 U2 3 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0267-8373 J9 WORK STRESS JI Work Stress PD JAN-MAR PY 1991 VL 5 IS 1 BP 29 EP 35 DI 10.1080/02678379108257000 PG 7 WC Psychology, Applied SC Psychology GA GB529 UT WOS:A1991GB52900004 ER PT J AU AMMAN, M BENJACOB, E COHN, J AF AMMAN, M BENJACOB, E COHN, J TI THERMO-COULOMB EFFECTS IN MESOSCOPIC TUNNEL-JUNCTIONS SO ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER LA English DT Article ID MICROSCOPE; SYSTEMS AB We present a study of the thermoelectric effects in tunnel junctions. In particular we calculate the thermopower coefficient S and the Peltier coefficient-PI. For macroscopic junctions we demonstrate the sensitivity of S and PI to the structure of the density of states. For mesoscopic junctions we show that Coulomb effects modify the ordinary Onsager picture and the relation PI = TS. The coefficients S and PI are found to be very sensitive to the coupling of the junctions to the external world. We analyze measurements of the thermopower in granular films in terms of the thermo-Coulomb effects. We comment on the relevance of these effects to scanning tunneling microscope measurements. C1 TEL AVIV UNIV, FAC EXACT SCI, SCH PHYS & ASTRON, IL-69978 TEL AVIV, ISRAEL. USN, RES LAB, WASHINGTON, DC 20375 USA. RP AMMAN, M (reprint author), UNIV MICHIGAN, DEPT PHYS, ANN ARBOR, MI 48109 USA. NR 13 TC 11 Z9 11 U1 0 U2 1 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0722-3277 J9 Z PHYS B CON MAT JI Z. Phys. B-Condens. Mat. PY 1991 VL 85 IS 3 BP 405 EP 411 DI 10.1007/BF01307637 PG 7 WC Physics, Condensed Matter SC Physics GA GV450 UT WOS:A1991GV45000013 ER PT J AU DUNLAP, BI AF DUNLAP, BI TI SYMMETRY AND FERROMAGNETIC CLUSTERS SO ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS LA English DT Article; Proceedings Paper CT 5TH INTERNATIONAL MEETING ON SMALL PARTICLES AND INORGANIC CLUSTERS CY SEP 10-14, 1990 CL CONSTANCE, FED REP GER SP DEUT FORSCHUNGEMEINSCH, UNIV KONSTANZ ID APPROXIMATIONS AB Isomers of pure Fe13 and icosahedral Fe12X clusters are studied using the all-electron linear-combination-of-Gaussian-type-orbital (LCGTO) local-density-functional (LDF) methods that allow the spin and geometry of the cluster to be determined self-consistently. The Fe13 ground state is icosahedral. The icosahedral cluster also has the greatest magnetic moment because of increased symmetry-required orbital degeneracy for electrons of different spins. The central atom of the icosahedral iron cluster has been varied to optimize the spin of the cluster keeping the oribital contribution to the magnetic moment quenched. Varying the central atom under this constraint can alter the magnetic moment by more than 20%. Similar studies have begun on 55-atom icosahedral iron clusters. RP DUNLAP, BI (reprint author), USN,RES LAB,THEORET CHEM SECT,CODE 6119,WASHINGTON,DC 20375, USA. OI Dunlap, Brett/0000-0003-1356-6559 NR 13 TC 35 Z9 37 U1 0 U2 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0178-7683 J9 Z PHYS D ATOM MOL CL JI Z. Phys. D-Atoms Mol. Clusters PY 1991 VL 19 IS 1-4 BP 255 EP 257 PG 3 WC Physics, Atomic, Molecular & Chemical SC Physics GA FQ942 UT WOS:A1991FQ94200063 ER PT J AU HENDERSON, DR AF HENDERSON, DR TI THE AGE OF DIMINISHED EXPECTATIONS - KRUGMAN,P SO FORTUNE LA English DT Book Review RP HENDERSON, DR (reprint author), USN,POSTGRAD SCH,MONTEREY,CA 93940, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU TIME INC PI NEW YORK PA TIME & LIFE BUILDING ROCKEFELLER CENTER, NEW YORK, NY 10020-1393 SN 0015-8259 J9 FORTUNE JI Fortune PD DEC 31 PY 1990 VL 122 IS 16 BP 113 EP 114 PG 2 WC Business SC Business & Economics GA EM305 UT WOS:A1990EM30500017 ER PT J AU KUSTERBECK, AW WEMHOFF, GA CHARLES, PT YEAGER, DA BREDEHORST, R VOGEL, CW LIGLER, FS AF KUSTERBECK, AW WEMHOFF, GA CHARLES, PT YEAGER, DA BREDEHORST, R VOGEL, CW LIGLER, FS TI A CONTINUOUS-FLOW IMMUNOASSAY FOR RAPID AND SENSITIVE DETECTION OF SMALL MOLECULES SO JOURNAL OF IMMUNOLOGICAL METHODS LA English DT Article DE IMMUNOASSAY; FLUOROIMMUNOASSAY; BIOSENSOR; CONTINUOUS FLOW; HAPTEN ID ENZYME-IMMUNOASSAY; ASSAY; FLUOROIMMUNOASSAY; ANTIBODY; BINDING; SYSTEM; SERUM AB An immunosensor operating in continuous flow and capable of detecting low molecular weight antigens is described. The approach differs from previously described continuous flow assays by not requiring incubation steps or the introduction of additional reagents following the loading of the sample into the system. Detection of the antigen is rapid, occurring within 3 min in the system described. The assay is based on the binding of labeled antigen to an immobilized antibody, with subsequent displacement of the labeled antigen when antigen is present in the buffer flow. Signal detection occurs downstream of the antigen recognition event. In this study, the hapten 2,4-dinitrophenol (DNP) as DNP-lysine was used as model antigen. To generate a labeled antigen, DNP was coupled to the terminal amino group of insulin A chain (tetra S-sulfonate form) which provides two tyrosine residues for the introduction of an I-125-label (DNP-Ins-I-125) or three carboxyl groups for the attachment of three fluorescein residues (DNP-Ins-Fl). The radiolabeled antigen was used to establish assay conditions. Subsequently, fluorescein was substituted for the radioisotope label in order to develop an assay independent of the restrictions associated with isotopes. Using this flow immunoassay, we were able to detect DNP-lysine down to a detection limit of 143 nM (29 pmol/200-mu-l) using DNP-Ins-I-125 or DNP-Ins-Fl as labeled antigen. The density of immobilized antibody and the flow rate were identified to be critical parameters for the sensitivity of the assay. C1 USN,RES LAB,CTR BIO MOLEC SCI & ENGN,CODE 6090,WASHINGTON,DC 20375. GEORGETOWN UNIV,DEPT BIOCHEM & MOLEC BIOL,WASHINGTON,DC 20007. NR 17 TC 75 Z9 75 U1 1 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-1759 J9 J IMMUNOL METHODS JI J. Immunol. Methods PD DEC 31 PY 1990 VL 135 IS 1-2 BP 191 EP 197 DI 10.1016/0022-1759(90)90272-W PG 7 WC Biochemical Research Methods; Immunology SC Biochemistry & Molecular Biology; Immunology GA EP295 UT WOS:A1990EP29500024 PM 2125619 ER PT J AU DITTO, WL RAUSEO, SN SPANO, ML AF DITTO, WL RAUSEO, SN SPANO, ML TI EXPERIMENTAL CONTROL OF CHAOS SO PHYSICAL REVIEW LETTERS LA English DT Article ID SYSTEMS AB We have achieved control of chaos in a physical system using the method of Ott, Grebogi, and Yorke [Phys. Rev. Lett. 64, 1196 (1990)]. The method requires only small time-dependent perturbations of a single-system parameter and does not require that one have model equations for the dynamics. We demonstrate the power of the method by controlling a chaotic system around unstable periodic orbits of order 1 and 2, switching between them at will. RP DITTO, WL (reprint author), USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903, USA. RI Spano, Mark/B-6883-2011; OI Ditto, William/0000-0002-7416-8012 NR 14 TC 591 Z9 620 U1 0 U2 15 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD DEC 24 PY 1990 VL 65 IS 26 BP 3211 EP 3214 DI 10.1103/PhysRevLett.65.3211 PG 4 WC Physics, Multidisciplinary SC Physics GA EP045 UT WOS:A1990EP04500001 ER PT J AU TRAN, PX BRENNER, DW WHITE, CT AF TRAN, PX BRENNER, DW WHITE, CT TI COMPLEX ROUTE TO CHAOS IN VELOCITY-DRIVEN ATOMS SO PHYSICAL REVIEW LETTERS LA English DT Article ID MODE-LOCKING; UNSTABLE MANIFOLDS; FRACTAL STRUCTURE; DEVILS-STAIRCASE; RENORMALIZATION; CONVECTION; SYSTEMS AB The oscillations of a linear triatomic molecule with the first atom driven at a constant velocity v are studied numerically. As v increases, we observe a sequence of transitions from quasiperiodicity to chaos, mode locking, and chaos, another mode locking, then to chaos before the atoms break off. The largest Lyapunov exponent does not increase linearly with the driven velocity. The mode-locking structure for the last onset to chaos has a universal fractal dimension 0.871 +/- 0.001 at a winding number far from the golden mean. RP TRAN, PX (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Brenner, Donald/D-1741-2009 NR 16 TC 2 Z9 2 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD DEC 24 PY 1990 VL 65 IS 26 BP 3219 EP 3222 DI 10.1103/PhysRevLett.65.3219 PG 4 WC Physics, Multidisciplinary SC Physics GA EP045 UT WOS:A1990EP04500003 ER PT J AU SNYDER, WA KOWALSKI, MP CRUDDACE, RG FRITZ, GG MIDDLEDITCH, J FENIMORE, EE ULMER, MP MAJEWSKI, SR AF SNYDER, WA KOWALSKI, MP CRUDDACE, RG FRITZ, GG MIDDLEDITCH, J FENIMORE, EE ULMER, MP MAJEWSKI, SR TI SPARTAN-1 X-RAY OBSERVATIONS OF THE PERSEUS CLUSTER .2. THE DISTRIBUTION OF FLUX AND HARDNESS RATIO OUT TO A RADIUS OF 50 ARCMINUTES SO ASTROPHYSICAL JOURNAL LA English DT Article C1 UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545. NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60201. RP SNYDER, WA (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 4120,WASHINGTON,DC 20375, USA. NR 46 TC 15 Z9 15 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 20 PY 1990 VL 365 IS 2 BP 460 EP 470 DI 10.1086/169500 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EL773 UT WOS:A1990EL77300005 ER PT J AU HJELLMING, RM STEWART, RT WHITE, GL STROM, R LEWIN, WHG HERTZ, P WOOD, KS NORRIS, JP MITSUDA, K PENNINX, W VANPARADIJS, J AF HJELLMING, RM STEWART, RT WHITE, GL STROM, R LEWIN, WHG HERTZ, P WOOD, KS NORRIS, JP MITSUDA, K PENNINX, W VANPARADIJS, J TI RADIO AND X-RAY STATES IN THE X-RAY BINARY SCORPIUS X-1 SO ASTROPHYSICAL JOURNAL LA English DT Article C1 UNIV AMSTERDAM,ASTRON INST ANTON PANNEKOEK,1018 WB AMSTERDAM,NETHERLANDS. NETHERLANDS FDN RES RADIO ASTRON,7990 AA DWINGELOO,NETHERLANDS. CSIRO,DIV RADIO PHYS,EPPING,NSW 2121,AUSTRALIA. USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. INST SPACE & ASTRONAUT SCI,TOKYO 153,JAPAN. CTR HIGH ENERGY PHYS,AMSTERDAM,NETHERLANDS. RP HJELLMING, RM (reprint author), NATL RADIO ASTRON OBSERV,POB O,SOCORRO,NM 87801, USA. RI Mitsuda, Kazuhisa/C-2649-2008 NR 14 TC 37 Z9 37 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 20 PY 1990 VL 365 IS 2 BP 681 EP 685 DI 10.1086/169522 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EL773 UT WOS:A1990EL77300027 ER PT J AU SUMMERS, ME STROBEL, DF BEVILACQUA, RM ZHU, X DELAND, MT ALLEN, M KEATING, GM AF SUMMERS, ME STROBEL, DF BEVILACQUA, RM ZHU, X DELAND, MT ALLEN, M KEATING, GM TI A MODEL STUDY OF THE RESPONSE OF MESOSPHERIC OZONE TO SHORT-TERM SOLAR ULTRAVIOLET FLUX VARIATIONS SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID MIDDLE ATMOSPHERE; WATER-VAPOR; LOWER THERMOSPHERE; IRRADIANCE; TRANSPORT; RADIATION; PHOTOCHEMISTRY; STRATOSPHERE; CYCLE AB A one-dimensional photochemical model and a time-dependent heat equation which incorporates non-local thermodynamic equilibrium (non-LTE) IR radiative transfer are used to study the response of mesospheric ozone concentration to short-term solar UV flax variations. We compare our model results with the observed ozone response obtained from a statistical analysis of Solar Mesosphere Explorer (SME) data (Keating et al., 1987). Our model with sinusoidal 27-day-period forcing of mesospheric chemistry by solar ultraviolet flux, when combined with temperature-chemistry feedback, time-dependent atmospheric temperature effects, and low eddy mixing rates, reproduces the major characteristics of the observed ozone response but not the observed temperature response. Below 60 km the calculated response shows a strong dependence on the magnitude of the assumed flux modulation in the Hartley region of the spectrum. A comparison of the model O3 response with the SME observations suggests that there is negligible 27-day variation of solar flux longward of 2400 angstrom, in agreement with Lean (1987). The magnitude of the computed ozone response to increased solar UV flux in the upper mesosphere (above 70 km) is strongly coupled to the water vapor abundance through the HO(x) catalytic cycle that removes ozone. Our model predicts the essential aspects of the observed ozone response only when the water vapor mixing ratio and vertical eddy diffusion coefficient are a factor of 5 below observed and inferred mid-latitude values. But then the model results are in almost complete disagreement with the observed temperature amplitude and phase lag. Calculations performed with imposition of the temperature response observed by Keating et al. (1987) produces an ozone response in the middle mesosphere in severe conflict with observations, suggesting a need for better mesospheric and solar data and further modeling efforts to determine the role of dynamics in the mesospheric ozone and temperature response to solar UV variability. C1 CALTECH, JET PROP LAB, DIV EARTH & SPACE SCI 183-601, PASADENA, CA 91109 USA. ST SYST CORP, LANHAM, MD 20706 USA. NASA, LANGLEY RES CTR, DIV ATMOSPHER SCI, HAMPTON, VA 23665 USA. JOHNS HOPKINS UNIV, DEPT EARTH & PLANETARY SCI, BALTIMORE, MD 21218 USA. JOHNS HOPKINS UNIV, DEPT PHYS & ASTRON, BALTIMORE, MD 21218 USA. RP SUMMERS, ME (reprint author), USN, RES LAB, EO HULBURT CTR SPACE RES, MAIL CODE 41415, WASHINGTON, DC 20375 USA. RI Zhu, Xun/C-2097-2016 OI Zhu, Xun/0000-0001-7860-6430 NR 33 TC 24 Z9 24 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD DEC 20 PY 1990 VL 95 IS D13 BP 22523 EP 22538 DI 10.1029/JD095iD13p22523 PG 16 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA EQ840 UT WOS:A1990EQ84000018 ER PT J AU AUGUST, RA PHILLIPS, GW CUTCHIN, JH AF AUGUST, RA PHILLIPS, GW CUTCHIN, JH TI NEUTRON DETECTION VIA LONG-RANGE EVENTS RESULTING FROM FISSION IN THICK U-238 DISKS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 7TH SYMP ON X-RAY AND GAMMA-RAY SOURCES AND APPLICATIONS : RADIATION MEASUREMENTS AND APPLICATIONS CY MAY 21-24, 1990 CL UNIV MICHIGAN, ANN ARBOR, MI SP US DOE, NATL INST STAND & TECHNOL, UNIV MICHIGAN, HENRY FORD HOSP, ALBION COLL, E MICHIGAN UNIV HO UNIV MICHIGAN AB In our previous work, a 1 mm thick U-238 (uranium) disk backed by a charged-particle detector, when exposed to the neutron flux from a Cf-252 (californium) source (mean neutron energy of 2.2 MeV), showed a count-rate increase that was higher than can be accounted for by the detection of short-range primary fission fragments. Electrons resulting from fission product decays were seen as a more plausible reaction mechanism. The current study extends the investigation of this phenomenon by using six U-238 disks ranging in thickness from 100-mu-m to 1 mm in order to discern the relationship between disk thickness and neutron detection efficiency. Also considered is the effect of using thin foils of nonfissionable material in order to suppress the alpha-particle background from the U-238 disks. The exact isotopic composition of these U-238 samples is known, which eliminates a source of ambiguity in the previous study. With these samples we find that the excess neutrons found in the previous study are not seen. This forces us to conclude that the results reported in our previous work were not due to the detection of electrons resulting from beta-decay of the fission products of U-238, but were most likely the result of the interaction of a neutron with an impurity in the previous samples. C1 SACHS FREEMAN ASSOCIATES INC,LANDOVER,MD 20785. RP AUGUST, RA (reprint author), USN,RES LAB,CODE 4616,WASHINGTON,DC 20375, USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD DEC 20 PY 1990 VL 299 IS 1-3 BP 33 EP 37 DI 10.1016/0168-9002(90)90742-O PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA EV528 UT WOS:A1990EV52800007 ER PT J AU STERN, MH AF STERN, MH TI ATAXIA TELANGIECTASIA - A MODEL OF INVESTIGATION OF CHROMOSOMAL TRANSLOCATIONS SO SEMAINE DES HOPITAUX LA French DT Article RP STERN, MH (reprint author), NCI,NAVAL HOSP,NAVAL MED ONCOL BRANCH,BLDG 8 ROOM 5101,BETHESDA,MD 20814, USA. RI Stern, Marc-Henri/A-2728-2011 OI Stern, Marc-Henri/0000-0002-8100-2272 NR 0 TC 0 Z9 0 U1 0 U2 1 PU EXPANSION SCI FRANCAISE PI PARIS PA 31 BLVD LATOUR MAUBOURG, 75007 PARIS, FRANCE SN 0037-1777 J9 SEM HOP PARIS JI Sem. Hop. PD DEC 20 PY 1990 VL 66 IS 48-49 BP 2744 EP 2746 PG 3 WC Medicine, General & Internal SC General & Internal Medicine GA EP925 UT WOS:A1990EP92500007 ER PT J AU GAMMON, D SHANABROOK, BV KATZER, DS AF GAMMON, D SHANABROOK, BV KATZER, DS TI INTERFACES IN GAAS ALAS QUANTUM-WELL STRUCTURES SO APPLIED PHYSICS LETTERS LA English DT Article RP GAMMON, D (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Katzer, D. Scott/N-7841-2013 NR 13 TC 52 Z9 52 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD DEC 17 PY 1990 VL 57 IS 25 BP 2710 EP 2712 DI 10.1063/1.103807 PG 3 WC Physics, Applied SC Physics GA EM902 UT WOS:A1990EM90200029 ER PT J AU FRANKE, ED WIGNALL, FS CRUZ, ME ROSALES, E TOVAR, AA LUCAS, CM LLANOSCUENTAS, A BERMAN, JD AF FRANKE, ED WIGNALL, FS CRUZ, ME ROSALES, E TOVAR, AA LUCAS, CM LLANOSCUENTAS, A BERMAN, JD TI EFFICACY AND TOXICITY OF SODIUM STIBOGLUCONATE FOR MUCOSAL LEISHMANIASIS SO ANNALS OF INTERNAL MEDICINE LA English DT Article C1 CAYETANO HEREDIA UNIV,LIMA,PERU. CUZCO REG HOSP,CUZCO,PERU. WALTER REED ARMY MED CTR,WASHINGTON,DC 20307. RP FRANKE, ED (reprint author), USN,MED RES INST,DETACHMENT PERU,MIAMI,FL 34031, USA. RI Villasante, Eileen/G-3602-2011 NR 14 TC 90 Z9 91 U1 0 U2 1 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 DEC 15 PY 1990 VL 113 IS 12 BP 934 EP 940 PG 7 WC Medicine, General & Internal SC General & Internal Medicine GA EM297 UT WOS:A1990EM29700007 PM 2173461 ER PT J AU MCELVANY, SW AF MCELVANY, SW TI PRODUCTION, DISSOCIATION AND REACTIVITY OF CARBON CLUSTER ANIONS SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES LA English DT Article ID LASER VAPORIZATION; IONS; RESONANCE; SILICON; BEAMS; C-6 AB Negative carbon cluster ions, C(n)- (n less-than-or-equal-to 13), produced by the direct laser vaporization of graphite have been studied by using Fourier transform mass spectrometry. Low-energy collision-induced dissociation (CID) of C(n)- (n = 5-13) results in loss of neutral C3 which also competes with electron detachment. The ion/molecule reactions of C(n)- (n = 4-13) with F2 and C2N2 indicate that only linear C(n)- are formed by direct laser vaporization. No evidence for structural isomers of C(n)- is observed, although product ion isomers are formed in the reaction of C5- with C2N2. The C5C2N2- isomers are differentiated by differences in their reactivity and CID spectra. The differences observed in the reactivity and CID of reaction products for odd and even n are consistent with polyacetylene (even n) and cumulene (odd n) structures for the carbon clusters. These results are compared with previous C(n)- studies, including a discussion of structural implications and formation mechanisms of C(n)- produced by various techniques. RP MCELVANY, SW (reprint author), USN,RES LAB,DIV CHEM,CODE 6111,WASHINGTON,DC 20375, USA. NR 32 TC 47 Z9 47 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-1176 J9 INT J MASS SPECTROM JI Int. J. Mass Spectrom. Ion Process. PD DEC 15 PY 1990 VL 102 BP 81 EP 98 DI 10.1016/0168-1176(90)80053-6 PG 18 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA ET921 UT WOS:A1990ET92100006 ER PT J AU FERNSLER, RF HUBBARD, RF SLINKER, SP AF FERNSLER, RF HUBBARD, RF SLINKER, SP TI FOIL FOCUSING OF ELECTRON-BEAMS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID PROPAGATION; INTENSE; SYSTEM AB Thin conducting foils focus charged particle beams through image charges induced on the foils. Such focusing has led to the suggestion that foils be used to transport intense, relativistic electron beams in high-energy accelerators. This paper examines some of the limitations of foil focusing including sensitivity to the beam parameters, emittance growth from anharmonic focusing, and beam stability in multifoil transport. The analysis is based on a thin-lens electrostatic treatment of paraxial beams. RP FERNSLER, RF (reprint author), USN,RES LAB,DIV PLASMA PHYS,BEAM PHYS BRANCH,WASHINGTON,DC 20375, USA. NR 23 TC 12 Z9 12 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD DEC 15 PY 1990 VL 68 IS 12 BP 5985 EP 5994 DI 10.1063/1.346932 PG 10 WC Physics, Applied SC Physics GA EP011 UT WOS:A1990EP01100005 ER PT J AU KENNEDY, TA FREITAS, JA BISHOP, SG AF KENNEDY, TA FREITAS, JA BISHOP, SG TI OPTICALLY DETECTED MAGNETIC-RESONANCE OF CUBIC SIC GROWN BY CHEMICAL VAPOR-DEPOSITION ON SI SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID SILICON-CARBIDE; PHOTOLUMINESCENCE; DEFECTS; RADIATION; ACCEPTOR AB Two distinct spectra are reported from an optically detected magnetic resonance study of epitaxial films of cubic SiC. The first is a Lorentzian, single line with g = 2.0065 +/- 0.0015, which is strong in Al-doped SiC. This line is attributed to residual donors. The second spectrum, observed in both Al-doped and undoped samples, is dominated by a pair of exchange-split lines with g = 2.0024 and a = 0.095 cm-1. Although a definite assignment of this spectrum cannot be made, spectral dependence studies show it is associated with a defect-related luminescence band in the energy range from 1.6 to 1.9 eV. C1 SACH FREEMAN ASSOCIATES,LANDOVER,MD 20785. RP KENNEDY, TA (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 19 TC 16 Z9 16 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD DEC 15 PY 1990 VL 68 IS 12 BP 6170 EP 6173 DI 10.1063/1.346906 PG 4 WC Physics, Applied SC Physics GA EP011 UT WOS:A1990EP01100027 ER PT J AU NELSON, HH MCDONALD, JR AF NELSON, HH MCDONALD, JR TI ENERGY PARTITIONING IN THE 266 NM DISSOCIATION OF HN3 AND RELATIVE TRANSITION-PROBABILITIES IN THE NH (C 1-PI-REVERSIBLEA 1-DELTA) SYSTEM SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID LAMBDA-DOUBLET SELECTIVITY; 193 NM; HNCO PHOTODISSOCIATION; STATE DISTRIBUTIONS; PHOTO-DISSOCIATION; REACTION-KINETICS; LASER PHOTOLYSIS; SUPERSONIC BEAM; HYDRAZOIC ACID; UV PHOTOLYSIS AB The emission spectra of NH(c 1-PI) and laser induced fluorescence excitation spectra of the NH (a 1-DELTA) fragment produced from the 266 nm photolysis of HN3 have been measured and several new vibronic bands in the c 1-PI-if-and-only-if-a 1-DELTA system have been characterized. The dispersed emission measurements are used to determine the transition probabilities connecting the upsilon = 0, 1 levels of the (c 1-PI) state and the upsilon = 0, 1, 2, and 3 levels of the (a 1-DELTA) state and, ultimately, the nascent vibrational distribution in the NH product. Measurement of the collision-free Doppler broadened line shapes of single rotational features allows the NH translational energy to be determined in several (a 1-DELTA) vibronic levels. These studies complete the characterization of the distribution of excess dissociation energy among all the internal and external degrees of freedom of the fragments in this dissociation. RP NELSON, HH (reprint author), USN,RES LAB,DIV CHEM,CODE 6110,WASHINGTON,DC 20375, USA. NR 47 TC 36 Z9 36 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD DEC 15 PY 1990 VL 93 IS 12 BP 8777 EP 8783 DI 10.1063/1.459266 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA EP160 UT WOS:A1990EP16000042 ER PT J AU SERREZE, MC MASLANIK, JA PRELLER, RH BARRY, RG AF SERREZE, MC MASLANIK, JA PRELLER, RH BARRY, RG TI SEA ICE CONCENTRATIONS IN THE CANADA BASIN DURING 1988 - COMPARISONS WITH OTHER YEARS AND EVIDENCE OF MULTIPLE FORCING MECHANISMS SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Article ID ARCTIC BASIN; SATELLITE; SUMMER; MODEL; ZONE; CLOUDINESS; EXCHANGE; IMAGERY; MOTION AB During summer 1988, a large area of reduced ice concentration developed within the Arctic pack ice of the Canada Basin. Data from the special sensor microwave imager (SSM/I) and visible-band imagery show that by early September, this feature extended north of 80-degrees-N, with SSM/I-derived ice concentrations of 40-80% covering an area approximately 1.0 x 10(6) km2. Drifting buoys, surface pressure fields, output from the Polar Ice Prediction System (PIPS) sea ice model and other meteorological data are used to examine processes responsible for development of the reduced ice concentrations. While the model indicates that ice divergence in summer offers a partial explanation, (1) anomalously warm atmospheric conditions, (2) generally clear skies in June and July, (3) extensive fracturing of the pack ice in spring and, perhaps, (4) anomalous advection of oceanic heat may all have played contributing roles. However, the second and third of these effects may occur in most years. Coupled with additional observations suggestive of recurring bathymetrically induced effects on lateral transport of ocean heat, we conclude that although the extent and magnitude of the concentration reductions during 1988 are unusual, these recurring factors tend to predispose the pack ice in the Canada Basin to decay. C1 USN,OCEAN & ATMOSPHER RES LAB,STENNIS SPACE CTR,MS 39529. RP SERREZE, MC (reprint author), UNIV COLORADO,NOAA,COOPERAT INST RES ENVIRONM SCI,BOULDER,CO 80309, USA. NR 51 TC 7 Z9 7 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 DEC 15 PY 1990 VL 95 IS C12 BP 22253 EP 22267 DI 10.1029/JC095iC12p22253 PG 15 WC Oceanography SC Oceanography GA EP457 UT WOS:A1990EP45700011 ER PT J AU LIM, H LIM, TK CHANG, CP AF LIM, H LIM, TK CHANG, CP TI REEXAMINATION OF WAVE-CISK THEORY - EXISTENCE AND PROPERTIES OF NONLINEAR WAVE-CISK MODES SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article ID DAY OSCILLATIONS; TROPICS AB Linear analyses of wave-CISK models often lead to the conclusion that the mechanism does not explain the scale selection of planetary-scale tropical motions. In particular, Kelvin or gravity wave-CISK tends to prefer cumulus-scale motions. On the other hand, numerical models with "positive-only" heating did not experience much difficulty in generating large scale disturbances of realistic structure. A previous study explained these numerical results in terms of linear Kelvin wave-CISK modes, whose wave packages exhibit remarkable resemblence to the simulated disturbances. However, the linear theory can not explain how the simulated disturbances can maintain a "wavenumber-1" structure against the explosive growth of short wavelength components. A reexamination of the wave-CISK theories is carried out in this paper. It is argued that the CISK mechanism possess inherently a very severe form of nonlinearity that takes full effect for even infinitesimal perturbations. The linearized CISK theories, therefore, do not give a correct description of a CISK-driven system at any stage of its development. A simple 5-level 64-wave spectral model demonstrates that the nonlinear effects of wave-CISK alone is able to produce exponentially growing "wavenumber-1" flow patterns that propagate without change of shape. Since these flow patterns have well-defined structure, growth rate, and propagation speed, it is proposed to call them nonlinear wave-CISK modes. The nonlinear wave-CISK modes exhibit all the characteristics of the linear Kelvin wave-CISK packages of Chang and Lim (1988). The scale selection problem of their linear Kelvin wave-CISK theory has, however, been resolved. Introduction of a diffusion damping has no significant effect on the propagation speed and structure of these modes. The overall structure of the modes depends mainly on the growth rate. Varying other parameters may affect the growth rate; but modes of the same growth rate look rather like each other, irrespective of the other parameters. C1 USN,POSTGRAD SCH,DEPT METEOROL,MONTEREY,CA 93940. METEOROL SERV SINGAPORE,SINGAPORE,SINGAPORE. NR 12 TC 27 Z9 27 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 DEC 15 PY 1990 VL 47 IS 24 BP 3078 EP 3091 DI 10.1175/1520-0469(1990)047<3078:ROWCTE>2.0.CO;2 PG 14 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA EW643 UT WOS:A1990EW64300017 ER PT J AU MORIARTY, RM GUO, L KU, Y GILARDI, R AF MORIARTY, RM GUO, L KU, Y GILARDI, R TI SYNTHESIS AND NUCLEOPHILIC DISPLACEMENT-REACTIONS OF NOVEL (ETA-6-2-CHLORO-3-METHOXYESTRONE)(ETA-5-CYCLOPENTADIENYL)RUTHENIUM HEXAFLUOROPHOSPHATES SO JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS LA English DT Article AB The alpha and beta-stereoisomeric title compounds were synthesized and each stereoisomer underwent clean nucleophilic displacement with -OMe, pyrrolidine, malonate and ethylamine. C1 USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. RP MORIARTY, RM (reprint author), UNIV ILLINOIS,DEPT CHEM,CHICAGO,IL 60607, USA. NR 5 TC 15 Z9 15 U1 0 U2 0 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0022-4936 J9 J CHEM SOC CHEM COMM JI J. Chem. Soc.-Chem. Commun. PD DEC 15 PY 1990 IS 24 BP 1765 EP 1765 DI 10.1039/c39900001765 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA ET451 UT WOS:A1990ET45100011 ER PT J AU DEXTER, JL LANDRY, J COOPER, DG REINTJES, J AF DEXTER, JL LANDRY, J COOPER, DG REINTJES, J TI ULTRAVIOLET OPTICAL ISOLATORS UTILIZING KDP-ISOMORPHS SO OPTICS COMMUNICATIONS LA English DT Article ID COMPACT AB The KDP isomorphs have both large Verdet constants and excellent optical properties in the ultraviolet. With these combined features it is possible to construct a compact optical isolator using these materials with rare earth permanent magnets. This paper describes the construction of an optical isolator using the KDP-isomorph ADA, and its operation at 351 and 308 nm. The potential use of the other isomorphs in the ultraviolet will also be discussed. RP DEXTER, JL (reprint author), USN,RES LAB,LASER PHYS BRANCH,WASHINGTON,DC 20375, USA. NR 13 TC 7 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0030-4018 J9 OPT COMMUN JI Opt. Commun. PD DEC 15 PY 1990 VL 80 IS 2 BP 115 EP 118 DI 10.1016/0030-4018(90)90371-Y PG 4 WC Optics SC Optics GA ET430 UT WOS:A1990ET43000005 ER PT J AU MILLER, JB CORY, DG GARROWAY, AN AF MILLER, JB CORY, DG GARROWAY, AN TI LINE-NARROWING APPROACHES TO SOLID-STATE NMR IMAGING - PULSED GRADIENTS AND 2ND AVERAGING SO PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES LA English DT Article ID HIGH-RESOLUTION NMR; MAGNETIC-RESONANCE; IMAGES; DIFFRACTION; SEQUENCES AB There are questions in materials sciences which can be addressed by NMR imaging. However, not all materials exhibit sufficient molecular motion to reduce dipolar couplings to the level at which the familiar techniques of medical NMR imaging are appropriate. For the more general case of these less mobile materials, line-narrowing methods, specialized to imaging, are appropriate. We have earlier demonstrated that such imaging sequences adequately overcome the fundamental dipolar broadening in engineering polymers; however, these sequences are subject to certain practical limitations which we address. We present a class of homonuclear line-narrowing imaging methods which intercalate short gradient pulses (ca. 5-mu-s) into the RF pulse sequence. Such a strategy improves spatial resolution and signal sensitivity by reducing extraneous broadening from off-resonance effects. In a further implementation, the chemical shift and susceptibility terms in the spin hamiltonian are suppressed by 'second averaging' about a particular axis, while the hamiltonian for the gradient pulses is aligned along that axis: the result is a further improvement in spatial resolution. Prospects for the future of solid state NMR imaging are considered. RP MILLER, JB (reprint author), USN,RES LAB,CODE 6122,WASHINGTON,DC 20375, USA. NR 44 TC 23 Z9 23 U1 0 U2 4 PU ROYAL SOC LONDON PI LONDON PA 6 CARLTON HOUSE TERRACE, LONDON, ENGLAND SW1Y 5AG J9 PHILOS T ROY SOC A JI Philos. Trans. R. Soc. Lond. Ser. A-Math. Phys. Eng. Sci. PD DEC 15 PY 1990 VL 333 IS 1632 BP 413 EP 426 DI 10.1098/rsta.1990.0169 PG 14 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA EU157 UT WOS:A1990EU15700002 ER PT J AU ERWIN, SC PICKETT, WE AF ERWIN, SC PICKETT, WE TI 1ST-PRINCIPLES SUPERCELL STUDIES OF THE NITROGEN IMPURITY IN DIAMOND SO PHYSICAL REVIEW B LA English DT Article C1 USN, RES LAB, DIV CONDENSED MATTER & RADIAT SCI, COMPLEX SYST THEORY BRANCH, WASHINGTON, DC 20375 USA. RI Erwin, Steven/B-1850-2009 NR 35 TC 13 Z9 13 U1 0 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1990 VL 42 IS 17 BP 11056 EP 11062 DI 10.1103/PhysRevB.42.11056 PG 7 WC Physics, Condensed Matter SC Physics GA EM727 UT WOS:A1990EM72700027 ER PT J AU RUDIN, S REINECKE, TL SEGALL, B AF RUDIN, S REINECKE, TL SEGALL, B TI TEMPERATURE-DEPENDENT EXCITON LINEWIDTHS IN SEMICONDUCTORS SO PHYSICAL REVIEW B LA English DT Article C1 USN,RES LAB,WASHINGTON,DC 20375. CASE WESTERN RESERVE UNIV,CLEVELAND,OH 44106. RP RUDIN, S (reprint author), USA,ELECTR TECHNOL & DEVICES LAB,FT MONMOUTH,NJ 07703, USA. NR 41 TC 261 Z9 262 U1 3 U2 21 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 DEC 15 PY 1990 VL 42 IS 17 BP 11218 EP 11231 DI 10.1103/PhysRevB.42.11218 PG 14 WC Physics, Condensed Matter SC Physics GA EM727 UT WOS:A1990EM72700049 ER PT J AU BOYER, LL BROUGHTON, JQ AF BOYER, LL BROUGHTON, JQ TI STATICS AND DYNAMICS OF ICOSAHEDRALLY TWINNED AND SINGLE-CRYSTAL FCC CLUSTERS SO PHYSICAL REVIEW B LA English DT Article ID ARGON CLUSTERS; QUASICRYSTALS; PHASE AB Molecular-dynamics simulations were performed for isolated clusters of up to N approximately 5000 atoms interacting with Lennard-Jones potentials. Static energies for single-crystal fee clusters, with varying surface structures, were computed and compared with that of icosahedrally twinned structures. The icosahedral form was found to have the lowest static energy for clusters of a few thousand atoms or fewer. The vibrational spectrum was computed for clusters up to N = 943 in order to include zero-point motion in the free energy. Zero-point motion decreases the energy difference between the fcc and icosahedral forms for small clusters. A distinguishing feature of the icosahedral spectrum is a high-frequency local mode involving, primarily, just the motion of the central atom. Its frequency increases with increasing cluster size, corresponding to an increasing pressure transmitted, layer by layer, from the surface to the central atom. For clusters larger than N approximately 1000 the energy per atom is lower if the central site is vacant than if it is occupied. An analysis of the energies of small clusters, between 13 and 55 atoms, suggests that fcc is most likely to nucleate for N approximately 19. Possible implications for the formation of quasicrystals are discussed. RP BOYER, LL (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. NR 16 TC 33 Z9 33 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 DEC 15 PY 1990 VL 42 IS 18 BP 11461 EP 11468 DI 10.1103/PhysRevB.42.11461 PG 8 WC Physics, Condensed Matter SC Physics GA EP284 UT WOS:A1990EP28400001 ER PT J AU HAFTEL, MI ANDREADIS, TD LILL, JV ERIDON, JM AF HAFTEL, MI ANDREADIS, TD LILL, JV ERIDON, JM TI SURFACE RELAXATION OF ALPHA-IRON AND THE EMBEDDED-ATOM METHOD SO PHYSICAL REVIEW B LA English DT Article ID 100 CRYSTAL FACES; ENERGY-ELECTRON-DIFFRACTION; LEED INTENSITY ANALYSIS; MULTILAYER RELAXATION; STRUCTURAL DETERMINATION; UNIVERSAL FEATURES; METHOD MODEL; FCC METALS; RECONSTRUCTION; PLATINUM AB The surface-relaxation properties of bcc iron are calculated with the embedded-atom method (EAM). The main goal of the investigation is to determine what constraints the correct prediction of surface-relaxation quantities places on features of EAM potentials. Seven specific EAM potentials are designed to reproduce experimental bulk properties including elastic constants and phonon frequencies. The features of the embedding function F(rho) and two-body potential V(r) for each potential are discussed. The perpendicular and parallel surface relaxation quantities for the six faces (100), (110), (111), (210), (310) and (211) are calculated for each potential. The theoretical predictions are compared with the experimental data. Two of the models are found to reproduce the experimental data rather well. The influence of the features of each potential on the atomic spacing is discussed. Our main conclusion is that surface-relaxation predictions can place important constraints on the EAM. In the case of bcc iron, important roles of nearest-neighbor repulsion and second-neighbor attraction are indicated by the experimental surface-relaxation data. RP USN, RES LAB, CODE 4651, WASHINGTON, DC 20375 USA. NR 48 TC 53 Z9 53 U1 1 U2 5 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1990 VL 42 IS 18 BP 11540 EP 11552 DI 10.1103/PhysRevB.42.11540 PG 13 WC Physics, Condensed Matter SC Physics GA EP284 UT WOS:A1990EP28400007 ER PT J AU SIGALAS, M BACALIS, NC PAPACONSTANTOPOULOS, DA MEHL, MJ SWITENDICK, AC AF SIGALAS, M BACALIS, NC PAPACONSTANTOPOULOS, DA MEHL, MJ SWITENDICK, AC TI TOTAL-ENERGY CALCULATIONS OF SOLID H, LI, NA, K, RB, AND CS SO PHYSICAL REVIEW B LA English DT Article ID LITHIUM; CRYSTAL; DENSITY AB Augmented-plane-wave calculations within the local-density approximation of the total energy of the solid alkali metals H, Li, Na, K, Rb, and Cs predict that except in Rb at T = O K the fcc structure is more stable than the bcc, which agrees with experiments for Li and Na. C1 NATL HELLENIC RES FDN, GR-11635 ATHENS, GREECE. USN, RES LAB, COMPLEX SYST THEORY BRANCH, WASHINGTON, DC 20375 USA. SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. RP SIGALAS, M (reprint author), RES CTR CRETE, POB 527, GR-71110 HERAKLION, GREECE. RI Bacalis, Naoum/G-5327-2013; Mehl, Michael/H-8814-2016 OI Bacalis, Naoum/0000-0002-9565-0414; NR 19 TC 53 Z9 53 U1 0 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1990 VL 42 IS 18 BP 11637 EP 11643 DI 10.1103/PhysRevB.42.11637 PG 7 WC Physics, Condensed Matter SC Physics GA EP284 UT WOS:A1990EP28400018 ER PT J AU FLEMING, JW BURTON, KA LADOUCEUR, HD AF FLEMING, JW BURTON, KA LADOUCEUR, HD TI OH AND CH PROFILES IN A 10 TORR METHANE OXYGEN FLAME - EXPERIMENT AND FLAME MODELING SO CHEMICAL PHYSICS LETTERS LA English DT Article AB Relative ground state CH and OH concentrations and OH rotational temperatures have been obtained in a premixed, 10 Torr, CH4/O2 flame, at an equivalence ratio of 0.9, using laser-induced fluorescence. Experimental results are compared to a flame modeling calculation incorporating a published chemical kinetic mechanism. Agreement between the experimental and calculated OH profile is excellent. The calculation closely approximates the location of the experimental CH concentration maximum and the width of the CH profile. The flame model indicates that even though the flame front is clearly separated from the burner, a significant amount of reaction occurs at and below the burner surface. These reactions are driven by highly reactive radical species diffusing from the flame front. RP FLEMING, JW (reprint author), USN,RES LAB,DIV CHEM,CODE 6110,WASHINGTON,DC 20375, USA. NR 20 TC 9 Z9 10 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD DEC 14 PY 1990 VL 175 IS 4 BP 395 EP 400 DI 10.1016/0009-2614(90)80131-V PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA ER627 UT WOS:A1990ER62700022 ER PT J AU KUTNER, ML VERTER, F RICKARD, LJ AF KUTNER, ML VERTER, F RICKARD, LJ TI CO(J=2-]1) STUDY OF MOLECULAR CLOUDS IN THE SOUTHWEST ARM OF M31 SO ASTROPHYSICAL JOURNAL LA English DT Article C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. RP KUTNER, ML (reprint author), RENSSELAER POLYTECH INST,DEPT PHYS,TROY,NY 12180, USA. NR 47 TC 11 Z9 11 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 10 PY 1990 VL 365 IS 1 BP 195 EP 207 DI 10.1086/169470 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EK729 UT WOS:A1990EK72900018 ER PT J AU WANG, YM SHEELEY, NR AF WANG, YM SHEELEY, NR TI MAGNETIC-FLUX TRANSPORT AND THE SUNSPOT-CYCLE EVOLUTION OF CORONAL HOLES AND THEIR WIND STREAMS SO ASTROPHYSICAL JOURNAL LA English DT Article RP WANG, YM (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 4172,WASHINGTON,DC 20375, USA. NR 41 TC 81 Z9 81 U1 1 U2 4 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 10 PY 1990 VL 365 IS 1 BP 372 EP 386 DI 10.1086/169492 PN 1 PG 15 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EK729 UT WOS:A1990EK72900040 ER PT J AU MILES, MH PARK, KH STILWELL, DE AF MILES, MH PARK, KH STILWELL, DE TI ELECTROCHEMICAL CALORIMETRIC EVIDENCE FOR COLD FUSION IN THE PALLADIUM DEUTERIUM SYSTEM SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY LA English DT Article ID ELECTROLYSIS; CATHODE AB Several different types of calorimetric cell designs were used to attempts to measure excess enthalpy during the electrolysis of LiOD + D20 using palladium cathodes. Control experiments were run by using light water in place of D2O or by using platinum cathodes in place of palladium. Previous experiments using thin palladium wire (d = 0.14 cm, A = 2.64 cm2) gave no significant differences between the Pd/D2O cells and the controls. The use of much thicker but shorter palladium rods (99.96%, d = 0.635 cm, A = 2.64 cm2) with constant currents of 100 mA/cm2 resulted in calorimetric evidence for excess enthalpy in five out of six Pd/D2O cells. These excess enthalpies are significant at the 99.95% confidence level. The excess rate of heating averaged 0.39 W/cm3 over a 9-day period in one experiment. The total excess enthalpies observed in several studies are difficult to explain by chemical reactions. Various possible calorimetric error sources also failed to provide satisfactory explanations for the excess enthalpies. There were no significant excess enthalpies in any Pd/H2O cells. These experiments indicate that a tightly-coiled anode surrounding the palladium cathode is an important factor for obtaining excess heat in cold fusion experiments. RP MILES, MH (reprint author), USN,CTR WEAP,DEPT RES,DIV CHEM,CHINA LAKE,CA 93555, USA. NR 12 TC 19 Z9 19 U1 1 U2 6 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 DEC 10 PY 1990 VL 296 IS 1 BP 241 EP 254 DI 10.1016/0022-0728(90)87246-G PG 14 WC Chemistry, Analytical; Electrochemistry SC Chemistry; Electrochemistry GA EN742 UT WOS:A1990EN74200018 ER PT J AU FREUND, HP AF FREUND, HP TI NONLINEAR-ANALYSIS OF HIGH-POWER CHERENKOV MASERS SO PHYSICAL REVIEW LETTERS LA English DT Article C1 SCI APPLICAT INT CORP,MCLEAN,VA 22102. RP FREUND, HP (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 14 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 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD DEC 10 PY 1990 VL 65 IS 24 BP 2993 EP 2996 DI 10.1103/PhysRevLett.65.2993 PG 4 WC Physics, Multidisciplinary SC Physics GA EL840 UT WOS:A1990EL84000019 ER PT J AU PRAMOD, K EATON, PE GILARDI, R FLIPPENANDERSON, JL AF PRAMOD, K EATON, PE GILARDI, R FLIPPENANDERSON, JL TI REGIOSPECIFIC OXIDATION OF BINOR-S AND ACID-CATALYZED REARRANGEMENT OF THE PRODUCT TO THE 1ST EXAMPLE OF A PENTACYCLO[6.6.0.05,14.07,12.09,13]TETRADECANE SO JOURNAL OF ORGANIC CHEMISTRY LA English DT Article C1 UNIV CHICAGO,DEPT CHEM,CHICAGO,IL 60637. USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. NR 29 TC 18 Z9 18 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 DEC 7 PY 1990 VL 55 IS 25 BP 6105 EP 6107 DI 10.1021/jo00312a014 PG 3 WC Chemistry, Organic SC Chemistry GA EL802 UT WOS:A1990EL80200014 ER PT J AU APLAN, PD LOMBARDI, DP GINSBERG, AM COSSMAN, J BERTNESS, VL KIRSCH, IR AF APLAN, PD LOMBARDI, DP GINSBERG, AM COSSMAN, J BERTNESS, VL KIRSCH, IR TI DISRUPTION OF THE HUMAN SCL LOCUS BY ILLEGITIMATE V-(D)-J RECOMBINASE ACTIVITY SO SCIENCE LA English DT Article C1 USN HOSP,NCI,PEDIAT BRANCH,BETHESDA,MD 20889. NCI,DIV CANC BIOL & DIAG,PATHOL LAB,BETHESDA,MD 20892. GEORGETOWN UNIV,WASHINGTON,DC 20057. RP APLAN, PD (reprint author), USN HOSP,NCI,MED ONCOL BRANCH,BETHESDA,MD 20889, USA. RI Aplan, Peter/K-9064-2016 NR 43 TC 257 Z9 259 U1 0 U2 5 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD DEC 7 PY 1990 VL 250 IS 4986 BP 1426 EP 1429 DI 10.1126/science.2255914 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA EL843 UT WOS:A1990EL84300049 PM 2255914 ER PT J AU HORAK, ID POPOVIC, M HORAK, EM LUCAS, PJ GRESS, RE JUNE, CH BOLEN, JB AF HORAK, ID POPOVIC, M HORAK, EM LUCAS, PJ GRESS, RE JUNE, CH BOLEN, JB TI NO T-CELL TYROSINE PROTEIN-KINASE SIGNALING OR CALCIUM MOBILIZATION AFTER CD4 ASSOCIATION WITH HIV-1 OR HIV-1 GP120 SO NATURE LA English DT Article C1 NCI,TUMOR VIRUS BIOL LAB,BLDG 41 ROOM D824,BETHESDA,MD 20892. NCI,MED BRANCH,BETHESDA,MD 20892. NCI,EXPTL IMMUNOL BRANCH,BETHESDA,MD 20892. USN,MED RES INST,BETHESDA,MD 20814. NEW MEXICO STATE UNIV,DEPT VIROL,PRIMATE RES INST,HOLLOMAN AFB,NM 88330. NR 19 TC 92 Z9 92 U1 0 U2 1 PU MACMILLAN MAGAZINES LTD PI LONDON PA 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF SN 0028-0836 J9 NATURE JI Nature PD DEC 6 PY 1990 VL 348 IS 6301 BP 557 EP 560 DI 10.1038/348557a0 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA EL760 UT WOS:A1990EL76000070 PM 1701034 ER PT J AU KARLE, IL FLIPPENANDERSON, JL UMA, K SUKUMAR, M BALARAM, P AF KARLE, IL FLIPPENANDERSON, JL UMA, K SUKUMAR, M BALARAM, P TI MODULAR DESIGN OF SYNTHETIC PROTEIN MIMICS - CRYSTAL-STRUCTURES, ASSEMBLY, AND HYDRATION OF 2 15-RESIDUE AND 16-RESIDUE APOLAR, LEUCYL-RICH HELICAL PEPTIDES SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article 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. NR 38 TC 36 Z9 36 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD DEC 5 PY 1990 VL 112 IS 25 BP 9350 EP 9356 DI 10.1021/ja00181a042 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA EL770 UT WOS:A1990EL77000042 ER PT J AU RENDELL, RW NGAI, KL AF RENDELL, RW NGAI, KL TI EVIDENCE FOR ANOMALOUS STRUCTURAL RELAXATION IN SIO2-FILMS SO APPLIED PHYSICS LETTERS LA English DT Article RP RENDELL, RW (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 28 TC 8 Z9 8 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 DEC 3 PY 1990 VL 57 IS 23 BP 2428 EP 2430 DI 10.1063/1.103866 PG 3 WC Physics, Applied SC Physics GA EK726 UT WOS:A1990EK72600013 ER PT J AU REICHEL, L GRAGG, WB AF REICHEL, L GRAGG, WB TI ALGORITHM-686 - FORTRAN SUBROUTINES FOR UPDATING THE QR DECOMPOSITION SO ACM TRANSACTIONS ON MATHEMATICAL SOFTWARE LA English DT Article DE ALGORITHMS; QR DECOMPOSITION; SUBSET SELECTION; UPDATING ID FACTORIZATION; MATRIX; ERROR AB Let the matrix A is-an-element-of R(m X n), m greater-than-or-equal-to n, have a QR decomposition A = QR, where Q is-an-element-of R(m X n) has orthonormal columns, and R is-an-element-of R(n X n) is Upper triangular. Assume that Q and R are explicitly known. We present FORTRAN subroutines that update the QR decomposition in a numerically stable manner when A is modified by a matrix of rank one, or when a row or a column is inserted or deleted. These subroutines are modifications of the Algol procedures in Daniel et al. [5]. We also present a subroutine that permutes the columns of A and updates the QR decomposition so that the elements in the lower right corner of R will generally be small if the columns of A are nearly linearly dependent. This subroutine is an implementation of the rank-revealing QR decomposition scheme recently proposed by Chan [3]. C1 UNIV KENTUCKY,DEPT MATH,LEXINGTON,KY 40506. BERGEN SCI CTR,N-5008 BERGEN,NORWAY. USN,POSTGRAD SCH,DEPT MATH,MONTEREY,CA 93943. NR 19 TC 24 Z9 25 U1 0 U2 0 PU ASSOC COMPUTING MACHINERY PI NEW YORK PA 1515 BROADWAY, NEW YORK, NY 10036 SN 0098-3500 J9 ACM T MATH SOFTWARE JI ACM Trans. Math. Softw. PD DEC PY 1990 VL 16 IS 4 BP 369 EP 377 DI 10.1145/98267.98291 PG 9 WC Computer Science, Software Engineering; Mathematics, Applied SC Computer Science; Mathematics GA HB555 UT WOS:A1990HB55500004 ER PT J AU VANDERMEER, RA AF VANDERMEER, RA TI MODELING DIFFUSIONAL GROWTH DURING AUSTENITE DECOMPOSITION TO FERRITE IN POLYCRYSTALLINE FE-C ALLOYS SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID CARBON-STEEL; KINETICS AB A grain-boundary-nucleated, diffusional growth model of austenite decomposition to proeutectoid ferrite is developed for polycrystalline iron-carbon alloys. The diffusion equation is solved under restricted diffusion conditions using the quasi-static method and employing local thermodynamic equilibrium at the disordered austenite: ferrite interface. Decomposition kinetics for a model polycrystalline material consisting of a log-normal distribution of spherical grains are calculated numerically. Effects of temperature, overall carbon concentration, volume change, austenite grain size and carbon buildup in the centers of the austenite grains are included in the treatment. A scaling factor is deduced that enables the effect of austenite grain size on transformation kinetics to be characterized provided kinetic information is available for one grain size. Experiments carried out on a laboratory steel verified the applicability of the scaling factor. Also, partial I-T and C-T diagrams can be computed from the model and sample calculations are presented for an iron + 0.036 wt% carbon steel. RP VANDERMEER, RA (reprint author), USN, RES LAB, WASHINGTON, DC 20375 USA. NR 22 TC 56 Z9 57 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 DEC PY 1990 VL 38 IS 12 BP 2461 EP 2470 DI 10.1016/0956-7151(90)90257-H PG 10 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA EN962 UT WOS:A1990EN96200008 ER PT J AU SPANOS, G AARONSON, HI AF SPANOS, G AARONSON, HI TI THE INTERFACIAL STRUCTURE AND HABIT PLANE OF PROEUTECTOID CEMENTITE PLATES SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID TRANSMISSION ELECTRON-MICROSCOPY; FCC-BCC BOUNDARIES; AL-AG SYSTEM; SYMPATHETIC NUCLEATION; ATOMIC MECHANISMS; GROWTH; AUSTENITE; CRYSTALLOGRAPHY; PRECIPITATION; MORPHOLOGY AB Three groups of previous investigators independently reported the anomalous result that the austenite habit plane of proeutectoid cementite plates, as determined with optical microscopy, is not unique. The present investigation utilized transmission electron microscopy (TEM) to study the interfacial structure and habit plane of proeutectoid cementite plates in a matrix of retained austenite in an Fe-0.81% C-12.3% Mn alloy in order to explain this unusual result. The broad faces of cementite plates were found to contain two types of structural feature: (1) large, kinked ledges with heights (h) of about 7 nm and spacings (lambda)-between 30 and 100 nm, and (2) a finely spaced set of straight ledges, with h-almost-equal-to-2 nm or less and lambda-almost-equal-to-4-6 nm, whose direction is nearly [110]A-parallel-to-[010]C. Matching of atom spacings showed this to be a direction of good fit between the austenite and cementite lattices. The apparent habit plane, measured with conventional TEM techniques, was always less than 10-degrees (and in most cases less than 5-degrees) from (11BAR3)A-parallel-to-(101)C. Atom matching studies also demonstrated that this pair of planes exhibits superior matching, and is thus likely to provide the conjugate atomic habit planes of the terraces of ledges. Thus, the non-uniqueness of the "optical microscopy apparent habit plane" of proeutectoid cementite plates appears to arise from the presence of arrays of ledges, combined with the sympathetic nucleation of new plates, on their broad faces. C1 CARNEGIE MELLON UNIV, DEPT MET ENGN & MAT SCI, PITTSBURGH, PA 15213 USA. RP SPANOS, G (reprint author), USN, RES LAB, PHYS MET BRANCH, 4555 OVERLOOK AVE SW, WASHINGTON, DC 20375 USA. NR 44 TC 41 Z9 42 U1 0 U2 3 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 DEC PY 1990 VL 38 IS 12 BP 2721 EP 2732 DI 10.1016/0956-7151(90)90286-P PG 12 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA EN962 UT WOS:A1990EN96200037 ER PT J AU ELLENBERGER, NW AF ELLENBERGER, NW TI THE TRANSFORMATION OF LONDON SOCIETY AT THE END OF VICTORIA REIGN - EVIDENCE FROM THE COURT PRESENTATION RECORDS SO ALBION LA English DT Article RP ELLENBERGER, NW (reprint author), USN ACAD, ANNAPOLIS, MD 21402 USA. NR 73 TC 5 Z9 5 U1 0 U2 0 PU APPALACHIAN STATE UNIV PI BOONE PA ALBION/HISTORY DEPT 210 WHITENER HALL, BOONE, NC 28608 USA SN 0095-1390 J9 ALBION JI Albion PD WIN PY 1990 VL 22 IS 4 BP 633 EP 653 DI 10.2307/4051393 PG 21 WC History SC History GA EX756 UT WOS:A1990EX75600004 ER PT J AU STRUEWING, JP GRAY, GC AF STRUEWING, JP GRAY, GC TI AN EPIDEMIC OF RESPIRATORY COMPLAINTS EXACERBATED BY MASS PSYCHOGENIC ILLNESS IN A MILITARY RECRUIT POPULATION SO AMERICAN JOURNAL OF EPIDEMIOLOGY LA English DT Article RP STRUEWING, JP (reprint author), USN,ENVIRONM & PREVENT MED UNIT 5,NAVAL STN,BOX 143,SAN DIEGO,CA 92136, USA. RI Struewing, Jeffery/C-3221-2008; Struewing, Jeffery/I-7502-2013 OI Struewing, Jeffery/0000-0002-4848-3334 NR 34 TC 19 Z9 19 U1 1 U2 1 PU AMER J EPIDEMIOLOGY PI BALTIMORE PA 624 N BROADWAY RM 225, BALTIMORE, MD 21205 SN 0002-9262 J9 AM J EPIDEMIOL JI Am. J. Epidemiol. PD DEC PY 1990 VL 132 IS 6 BP 1120 EP 1129 PG 10 WC Public, Environmental & Occupational Health SC Public, Environmental & Occupational Health GA EN620 UT WOS:A1990EN62000012 PM 2260544 ER PT J AU KELLEHER, PC KELLEY, LR RICKMAN, LS AF KELLEHER, PC KELLEY, LR RICKMAN, LS TI ANAPHYLACTOID REACTION AFTER TYPHOID VACCINATION SO AMERICAN JOURNAL OF MEDICINE LA English DT Note C1 USN HOSP,GROTON,CT. UNIV CALIF SAN DIEGO,MED CTR,LA JOLLA,CA 92093. RP KELLEHER, PC (reprint author), USN,UNDERSEA MED INST,GROTON,CT 06340, USA. NR 12 TC 4 Z9 4 U1 0 U2 0 PU EXCERPTA MEDICA INC PI NEW YORK PA 245 WEST 17TH STREET, NEW YORK, NY 10011 SN 0002-9343 J9 AM J MED JI Am. J. Med. PD DEC PY 1990 VL 89 IS 6 BP 822 EP 824 DI 10.1016/0002-9343(90)90232-3 PG 3 WC Medicine, General & Internal SC General & Internal Medicine GA EL693 UT WOS:A1990EL69300024 PM 2252054 ER PT J AU MINK, RB DUTKA, AJ KUMAROO, KK HALLENBECK, JM AF MINK, RB DUTKA, AJ KUMAROO, KK HALLENBECK, JM TI NO CONVERSION OF XANTHINE DEHYDROGENASE TO OXIDASE IN CANINE CEREBRAL-ISCHEMIA SO AMERICAN JOURNAL OF PHYSIOLOGY LA English DT Article DE FREE RADICALS; ISCHEMIA-REPERFUSION INJURY ID RAT-BRAIN; REPERFUSION; ALLOPURINOL; INJURY; TISSUES; INVOLVEMENT; INFARCTION; RADICALS; ENZYME; HEART AB Xanthine oxidase (XO) has been implicated as a source of free radicals mediating ischemia-reperfusion injury. Conversion of the non-free radical generating xanthine dehydrogenase (XD) to the free radical producing XO during ischemia has been demonstrated in several tissues. We examined the irreversible conversion of XD to XO in the dog brain after ischemia and after ischemia and reperfusion. Under pentobarbital sodium anesthesia and by use of a cerebrospinal fluid compression model of global cerebral ischemia, dogs were subjected to 30 min of ischemia (n = 8) or 30 min of ischemia and 60 min of reperfusion (n = 8). A cerebral perfusion pressure of 60 mmHg was maintained during reperfusion. Eight control dogs were not subjected to ischemia. After the dogs were killed their brains were rapidly removed and frozen in liquid nitrogen. XO and XD + XO activities were measured with a radioassay utilizing 8-[C-14] hypoxanthine and separating substrate and products by thin-layer chromatography. Total XD + XO activity was significantly (P < 0.05) decreased after ischemia and reperfusion (35.6 +/- 8.0 vs. 60.8 +/- 20.8 nmol.min-1.g protein-1 in controls, means +/- SD) but not after ischemia alone (48.2 +/- 20.4). XO/(XD + XO) was approximately 20% in all three groups. Irreversible XD to XO conversion is not an important mechanism leading to early tissue injury in global cerebral ischemia. C1 CHILDRENS NATL MED CTR,DEPT CRIT CARE MED,WASHINGTON,DC 20010. USN HOSP,DEPT NEUROL,BETHESDA,MD 20814. RP MINK, RB (reprint author), USN,MED RES INST,DEPT DIVING MED,MAILSTOP 38,BETHESDA,MD 20889, USA. NR 29 TC 13 Z9 13 U1 0 U2 0 PU AMER PHYSIOLOGICAL SOC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0002-9513 J9 AM J PHYSIOL JI Am. J. Physiol. PD DEC PY 1990 VL 259 IS 6 BP H1655 EP H1659 PN 2 PG 5 WC Physiology SC Physiology GA EQ387 UT WOS:A1990EQ38700006 ER PT J AU GOLDMAN, G WELBOURN, R KLAUSNER, JM ALEXANDER, S KOBZIK, L VALERI, CR SHEPRO, D HECHTMAN, HB AF GOLDMAN, G WELBOURN, R KLAUSNER, JM ALEXANDER, S KOBZIK, L VALERI, CR SHEPRO, D HECHTMAN, HB TI ATTENUATION OF ACID ASPIRATION EDEMA WITH PHALLOIDIN SO AMERICAN JOURNAL OF PHYSIOLOGY LA English DT Article DE PERMEABILITY; POLYMORPHONUCLEAR LEUKOCYTES; PULMONARY ENDOTHELIAL CELLS; PULMONARY EPITHELIAL CELLS; THROMBOXANE B2; LEUKOTRIENE B4 ID ENDOTHELIAL-CELL CYTOSKELETON; INDUCED INCREASES; PERMEABILITY; ADHESION; ALBUMIN; NEUTROPHILS; ANTAMANIDE; PULMONARY; ISCHEMIA; INVITRO AB Acid aspiration leads to pulmonary endothelial and epithelial cell (EC/EpC) injury characterized by increased permeability and polymorphonuclear (PMN) leukocyte diapedesis. Actin in the EC/EpC cytoskeleton has been shown to play a significant role in maintenance of the microvascular junction barrier. This study tests indirectly whether the development of permeability and diapedesis following acid aspiration is via disruption of the pulmonary cytoskeleton. Manipulation was achieved by the actin microfilament assembler phalloidin. Anesthetized rats (n = 88) underwent segmental lung installation of 0.1 ml saline or phalloidin (2 x 10(-6) M). Twenty minutes later 0.1 N HCl, saline, or phalloidin was introduced. After 3 h there was an increase in wet-to-dry weight (W/D) ratio of 6.6 and 5.1 in the HCl-injected and noninjected sides, protein concentration, 3,970 and 2,530-mu-g/ml, and accumulation of 93 PMN/ml (x10(4)) in bronchoalveolar lavage (BAL) of the HCl-injected lung. These values were higher than control animals. Local pretreatment with phalloidin attenuated acid-induced localized but not generalized permeability with reduction in W/D ratio, BAL protein concentration, and diapedesis (P < 0.05). Acid injection into airways also led to elevated thromboxane B2 and leukotriene B4 levels in plasma and BAL (P < 0.05) and generalized lung leukosequestration, events not affected by phalloidin. Taken together, these data suggest that acid aspiration lung injury is determined largely by loss of integrity of the pulmonary EC/EpC cytoskeleton with resultant loss of barrier function. C1 BRIGHAM & WOMENS HOSP,DEPT SURG,75 FRANCIS ST,BOSTON,MA 02115. BRIGHAM & WOMENS HOSP,DEPT PATHOL,BOSTON,MA 02115. HARVARD UNIV,SCH MED,BOSTON,MA 02115. USN,BLOOD RES LAB,BOSTON,MA 02115. BOSTON UNIV,CTR BIOL SCI,BOSTON,MA 02215. FU NHLBI NIH HHS [HL-16714-13]; NIGMS NIH HHS [GM-35141-03, GM-24891-11] NR 37 TC 12 Z9 12 U1 0 U2 0 PU AMER PHYSIOLOGICAL SOC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0002-9513 J9 AM J PHYSIOL JI Am. J. Physiol. PD DEC PY 1990 VL 259 IS 6 BP L378 EP L383 PN 1 PG 6 WC Physiology SC Physiology GA EQ382 UT WOS:A1990EQ38200073 PM 2260672 ER PT J AU LONG, GW CHAROENVIT, Y OPRANDY, JJ AF LONG, GW CHAROENVIT, Y OPRANDY, JJ TI IMMUNODOT ASSAY OF PLASMODIUM-FALCIPARUM SPOROZOITES IN MOSQUITOS USING A DIRECT BINDING MEMBRANE SYSTEM SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article ID LINKED IMMUNOSORBENT-ASSAY; SODIUM DODECYL-SULFATE; INFECTED MOSQUITOS; PROTEINS; IDENTIFICATION; NITROCELLULOSE; ANTIBODY AB We describe a membrane based immunodot assay for the detection of Plasmodium falciparum sporozoites mixed with mosquitoes. A crude sodium dodecyl sulfate extract of mosquitoes and sporozoites is passed through a bi-layered membrane system, the top layer being a polyvinyldiene difluoride hydrophilic pre-filter which screens out debris but allows the passage of antigen. Sporozoite, as well as mosquito, proteins are bound to the hydrophobic membrane below. This membrane was probed with a monoclonal antibody to the repeat region of the P. falciparum circumsporozoite protein, a peroxidase labeled second antibody and a tetramethyl-benzidine substrate. The method detects as few as 10 sporozoites/mosquito or 100 sporozoites in a pool of 10. C1 USN,MED RES INST,DEPT INFECT DIS,BETHESDA,MD 20899. NR 11 TC 0 Z9 1 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 DEC PY 1990 VL 43 IS 6 BP 597 EP 601 PG 5 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA ET983 UT WOS:A1990ET98300004 PM 2267962 ER PT J AU LEIVERS, D AF LEIVERS, D TI TOTAL SPINAL-ANESTHESIA FOLLOWING EARLY PROPHYLACTIC EPIDURAL BLOOD PATCH SO ANESTHESIOLOGY LA English DT Article C1 USN HOSP,DEPT ANESTHESIOL,SAN DIEGO,CA 92134. RP LEIVERS, D (reprint author), USN HOSP,DEPT CLIN INVEST,SAN DIEGO,CA 92134, USA. NR 31 TC 15 Z9 15 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0003-3022 J9 ANESTHESIOLOGY JI Anesthesiology PD DEC PY 1990 VL 73 IS 6 BP 1287 EP 1289 DI 10.1097/00000542-199012000-00038 PG 3 WC Anesthesiology SC Anesthesiology GA EM538 UT WOS:A1990EM53800038 PM 2248412 ER PT J AU HUDGINS, JJ BAGBY, MD ERICKSON, LC AF HUDGINS, JJ BAGBY, MD ERICKSON, LC TI THE EFFECT OF LONG-TERM DEFLECTION ON PERMANENT DEFORMATION OF NICKEL-TITANIUM ARCHWIRES SO ANGLE ORTHODONTIST LA English DT Article C1 UNIV NEBRASKA,COLL DENT,40TH & HOLDREGE,LINCOLN,NE 68583. USN,MARINE CORPS AIR STN,BEAUFORT,SC. NR 20 TC 13 Z9 13 U1 0 U2 0 PU ANGLE ORTHODONTISTS RES EDUC FOUNDATION INC PI APPLETON PA 100 W LAWRENCE ST, SUITE 406, APPLETON, WI 54911 SN 0003-3219 J9 ANGLE ORTHOD JI Angle Orthod. PD WIN PY 1990 VL 60 IS 4 BP 283 EP 288 PG 6 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA EG604 UT WOS:A1990EG60400013 PM 2256566 ER PT J AU DAGATA, JA VILLA, E LIN, MC AF DAGATA, JA VILLA, E LIN, MC TI UV DESORPTION AND PHOTOCHEMISTRY OF DIMETHYLGOLD HEXAFLUOROACETYLACETONATE ADSORBED ON A QUARTZ SUBSTRATE SO APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY LA English DT Article C1 USN,RES LAB,EO HULBURT CTR SPACE RES,DIV CHEM,WASHINGTON,DC 20375. EMORY UNIV,DEPT CHEM,ATLANTA,GA 30322. RP DAGATA, JA (reprint author), NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899, USA. NR 15 TC 5 Z9 5 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0721-7269 J9 APPL PHYS B-PHOTO PD DEC PY 1990 VL 51 IS 6 BP 443 EP 450 DI 10.1007/BF00329109 PG 8 WC Physics, Applied SC Physics GA EM030 UT WOS:A1990EM03000011 ER PT J AU GEYER, TJ WEIMER, WA AF GEYER, TJ WEIMER, WA TI PARAMETRIC EFFECTS ON PLASMA EMISSION PRODUCED DURING EXCIMER LASER ABLATION OF YBA2CU3O7-X SO APPLIED SPECTROSCOPY LA English DT Article DE EMISSION SPECTROSCOPY; LASERS, EXCIMER; MASS SPECTROMETRY; LASER ABLATION ID SUPERCONDUCTING THIN-FILMS; BA-CU-O; DEPOSITED HIGH-TC; OPTICAL-ABSORPTION; EVAPORATION; BULK; Y1BA2CU3O7-X; TARGET; VAPORIZATION; SPECTROSCOPY AB The effects of changes in experimental parameters on the plasma emission spectra produced during excimer laser ablation of YBa2Cu3O7 were investigated. Emission from YO is observed for low-incident laser fluences, but is absent for fluences at or above those used for thin film deposition by laser ablation. Excitation within the plasma appears to be primarily due to electron impact. The effects of incident laser fluence and ambient gas pressure on the plasma emission are distinct enough to allow adjustment of either parameter based on the observed change in the emission spectrum. Therefore, optical emission spectroscopy is well suited as a technique for in situ monitoring of the deposition of thin films by laser ablation. C1 USN,CTR WEAP,DEPT RES,DIV CHEM,CHINA LAKE,CA 93555. NR 43 TC 19 Z9 19 U1 0 U2 0 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA PO BOX 1438, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD DEC PY 1990 VL 44 IS 10 BP 1659 EP 1664 DI 10.1366/0003702904417454 PG 6 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA EQ822 UT WOS:A1990EQ82200011 ER PT J AU SIMON, T VRBA, FJ HERBST, W AF SIMON, T VRBA, FJ HERBST, W TI THE ULTRAVIOLET AND VISIBLE-LIGHT VARIABILITY OF BP TAURI - POSSIBLE CLUES FOR THE ORIGIN OF T-TAURI STAR ACTIVITY SO ASTRONOMICAL JOURNAL LA English DT Article C1 USN OBSERV,FLAGSTAFF,AZ 86002. WESLEYAN UNIV,DEPT ASTRON,MIDDLETOWN,CT 06457. RP SIMON, T (reprint author), UNIV HAWAII,INST ASTRON,2680 WOODLAWN DR,HONOLULU,HI 96822, USA. NR 35 TC 48 Z9 48 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 DEC PY 1990 VL 100 IS 6 BP 1957 EP 1967 DI 10.1086/115651 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EK585 UT WOS:A1990EK58500020 ER PT J AU VIVEKANAND, M AF VIVEKANAND, M TI ACCURACY OF BINARY STAR SEPARATIONS ESTIMATED FROM INTERFEROMETRIC DATA SO ASTRONOMICAL JOURNAL LA English DT Article C1 USN,RES LAB,WASHINGTON,DC 20375. CALTECH,PASADENA,CA 91125. RP VIVEKANAND, M (reprint author), UNIV SPACE RES ASSOC,600 MARYLAND AVE SW,SUITE 303,W WING,WASHINGTON,DC 20024, USA. NR 4 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 0004-6256 J9 ASTRON J JI Astron. J. PD DEC PY 1990 VL 100 IS 6 BP 2047 EP 2060 DI 10.1086/115659 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EK585 UT WOS:A1990EK58500028 ER PT J AU FIORITO, RB EICHLER, D ELLISON, DC AF FIORITO, RB EICHLER, D ELLISON, DC TI A STUDY OF THE PHASE-VELOCITY AND GROWTH OF WAVES AT PARALLEL SHOCKS SO ASTROPHYSICAL JOURNAL LA English DT Article C1 BEN GURION UNIV NEGEV,BEER SHEVA,ISRAEL. UNIV MARYLAND,COLLEGE PK,MD 20742. N CAROLINA STATE UNIV,RALEIGH,NC 27695. RP FIORITO, RB (reprint author), USN,CTR SURFACE WARFARE,10901 NEW HAMPSHIRE AVE,SILVER SPRING,MD 20903, USA. NR 17 TC 2 Z9 2 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 1 PY 1990 VL 364 IS 2 BP 582 EP 589 DI 10.1086/169441 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EJ401 UT WOS:A1990EJ40100025 ER PT J AU WEILER, KW PANAGIA, N SRAMEK, RA AF WEILER, KW PANAGIA, N SRAMEK, RA TI RADIO-EMISSION FROM SUPERNOVAE .2. SN1986J - A DIFFERENT KIND OF TYPE-II SO ASTROPHYSICAL JOURNAL LA English DT Article C1 SPACE TELESCOPE SCI INST,DEPT SPACE SCI,DIV ASTROPHYS,BALTIMORE,MD 21218. NATL RADIO ASTRON OBSERV,SOCORRO,NM 87801. RP WEILER, KW (reprint author), USN,RES LAB,CODE 4030,WASHINGTON,DC 20375, USA. NR 43 TC 135 Z9 135 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 1 PY 1990 VL 364 IS 2 BP 611 EP 625 DI 10.1086/169444 PN 1 PG 15 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EJ401 UT WOS:A1990EJ40100028 ER PT J AU TACCONIGARMAN, LE SCHLOERB, FP CLAUSSEN, MJ AF TACCONIGARMAN, LE SCHLOERB, FP CLAUSSEN, MJ TI HIGH SPECTRAL RESOLUTION OBSERVATIONS AND KINEMATIC MODELING OF THE 1667 MHZ HYPERFINE TRANSITION OF OH IN COMETS HALLEY (1982I), GIACOBINI-ZINNER (1984E), HARTLEY-GOOD (1985L), THIELE (1985M), AND WILSON (1986L) SO ASTROPHYSICAL JOURNAL LA English DT Article C1 UNIV MASSACHUSETTS,COLL RADIO ASTRON OBSERV 5,AMHERST,MA 01003. UNIV MASSACHUSETTS,DEPT PHYS & ASTRON,AMHERST,MA 01003. USN,RES LAB,CTR ADV SPACE SENSING,WASHINGTON,DC 20375. NR 53 TC 20 Z9 20 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 1 PY 1990 VL 364 IS 2 BP 672 EP 686 DI 10.1086/169450 PN 1 PG 15 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA EJ401 UT WOS:A1990EJ40100034 ER PT J AU DOBIE, TG MAY, JG GUTIERREZ, C HELLER, SS AF DOBIE, TG MAY, JG GUTIERREZ, C HELLER, SS TI THE TRANSFER OF ADAPTATION BETWEEN ACTUAL AND SIMULATED ROTARY STIMULATION SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article C1 UNIV NEW ORLEANS,DEPT PSYCHOL,NEW ORLEANS,LA. RP DOBIE, TG (reprint author), USN,BIODYNAM LAB,BOX 29407,MICHOUD STN,NEW ORLEANS,LA 70189, USA. NR 20 TC 2 Z9 2 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 DEC PY 1990 VL 61 IS 12 BP 1085 EP 1091 PG 7 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA EM052 UT WOS:A1990EM05200003 PM 2285397 ER PT J AU CLARK, JB BOHNKER, BK HAYES, GB MOREY, WA AF CLARK, JB BOHNKER, BK HAYES, GB MOREY, WA TI NAVY HELICOPTER PILOT WITH A JUXTASELLAR MASS - CASE-REPORT WITH AEROMEDICAL CONSIDERATIONS SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article C1 USN,DIV BIOMED SCI,MED RES LAB,PENSACOLA,FL 32508. RP CLARK, JB (reprint author), USN,INST AEROSP MED,DEPT NEUROL & INTERNAL MED,CODE 24,PENSACOLA,FL 32508, USA. OI Clark, Jonathan/0000-0002-1162-1238 NR 22 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 DEC PY 1990 VL 61 IS 12 BP 1141 EP 1144 PG 4 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA EM052 UT WOS:A1990EM05200013 PM 2285405 ER PT J AU CAMMAROTA, JP WHINNERY, JE AF CAMMAROTA, JP WHINNERY, JE TI ENHANCING AIRCREW CENTRIFUGE HIGH-G TRAINING USING ONLINE VIDEOTAPE DOCUMENTATION SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Note C1 USN,CTR AIR DEV,WARMINSTER,PA 18974. NR 1 TC 2 Z9 2 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 DEC PY 1990 VL 61 IS 12 BP 1153 EP 1155 PG 3 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA EM052 UT WOS:A1990EM05200016 PM 2285408 ER PT J AU KARLE, IL FLIPPENANDERSON, JL UMA, K BALARAM, P AF KARLE, IL FLIPPENANDERSON, JL UMA, K BALARAM, P TI HELIX AGGREGATION IN PEPTIDE CRYSTALS - OCCURRENCE OF EITHER ALL PARALLEL OR ANTIPARALLEL PACKING MOTIFS FOR ALPHA-HELICES IN POLYMORPHS OF BOC-AIB-ALA-LEU-ALA-LEU-AIB-LEU-ALA-LEU-AIB-OME SO BIOPOLYMERS LA English DT Article 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 [GM30902] NR 24 TC 32 Z9 32 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 DEC PY 1990 VL 29 IS 14 BP 1835 EP 1845 DI 10.1002/bip.360291414 PG 11 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA DR601 UT WOS:A1990DR60100013 PM 2207288 ER PT J AU LEE, TF TAG, PM AF LEE, TF TAG, PM TI IMPROVED DETECTION OF HOTSPOTS USING THE AVHRR 3.7-UM CHANNEL SO BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY LA English DT Article ID IDENTIFICATION AB The 3.7-mu-m channel on-board the National Oceanic and Atmospheric Administration's (NOAA) Advanced Very High Resolution Radiometer (AVHRR) provides the unique capability to detect small, but hot, surface features. We present an image-processing technique based on a pixel-by-pixel subtraction of 10.8-mu-m from 3.7-mu-m brightness temperatures. We also develop an automated technique which classifies hotspots based on: 1) the brightness temperatures at 3.7 and 10.8 mu-m at a given pixel, and 2) a background temperature based on the immediately surrounding pixels. RP LEE, TF (reprint author), USN,ATMOSPHER DIRECTORATE,OCEANOG & ATMOSPHER RES LAB,MONTEREY,CA 93943, USA. NR 18 TC 65 Z9 66 U1 1 U2 1 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 DEC PY 1990 VL 71 IS 12 BP 1722 EP 1730 DI 10.1175/1520-0477(1990)071<1722:IDOHUT>2.0.CO;2 PG 9 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA ER619 UT WOS:A1990ER61900001 ER PT J AU SMITH, DR SNOW, JT AF SMITH, DR SNOW, JT TI GUIDE TO ESTABLISHING SCHOOL AND POPULAR EDUCATIONAL ACTIVITIES SO BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY LA English DT Article C1 PURDUE UNIV,W LAFAYETTE,IN 47907. RP SMITH, DR (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 0 TC 4 Z9 4 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 DEC PY 1990 VL 71 IS 12 BP 1760 EP 1766 PG 7 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA ER619 UT WOS:A1990ER61900007 ER PT J AU JOYNER, D AF JOYNER, D TI ON TWISTED ORBITAL INTEGRAL IDENTITIES FOR PGL(3) OVER A P-ADIC FIELD SO CANADIAN JOURNAL OF MATHEMATICS-JOURNAL CANADIEN DE MATHEMATIQUES LA English DT Article AB The object of this paper is to prove certain p-adic orbital integral identities needed in order to accomplish the symmetric square transfer via the twisted Arthur trace formula. Only section 5 of of this article contains original material, the rest of it is due to R. Langlands. Very briefly, we reduce the problem of proving certain orbital integral identities for "matching" functions in the respective Hecke algebras to two counting problems on the buildings. We give Langlands' solution of one of these problems in the case of the unit elements of the respective Hecke algebras and section 5 provides the solution to the other one, again, in the unit element case. The main results assume p not-equal 2. C1 USN ACAD,DEPT MATH,ANNAPOLIS,MD 21402. NR 18 TC 2 Z9 2 U1 0 U2 0 PU CANADIAN MATHEMATICAL SOC PI OTTAWA PA 577 KING EDWARD RD, PO BOX 450, STATION A, OTTAWA ON K1N 6N5, CANADA SN 0008-414X J9 CAN J MATH JI Can. J. Math.-J. Can. Math. PD DEC PY 1990 VL 42 IS 6 BP 1098 EP 1130 DI 10.4153/CJM-1990-059-6 PG 33 WC Mathematics SC Mathematics GA GC704 UT WOS:A1990GC70400010 ER PT J AU SCHMITT, HA MUFTI, A AF SCHMITT, HA MUFTI, A TI NONCOMPACT ORTHOSYMPLETIC SUPERSYMMETRY - AN EXAMPLE FROM N = 1, D = 1 SUPERSYMMETRIC QUANTUM-MECHANICS SO CANADIAN JOURNAL OF PHYSICS LA English DT Article ID JAYNES-CUMMINGS MODEL; STATES AB The supersymmetric quantum mechanical hormonic oscillator, a particular example of an N = 1, d = 1 supersymmetric quantum mechanical model, is used to construct a Hamiltonian exhibiting a noncompact orthosymplectic supersymmetry. This Hamiltonian is the strong-coupling limit of the Jaynes-Cummings model. C1 UNIV ARIZONA,DEPT PHYS,TUCSON,AZ 85721. RP SCHMITT, HA (reprint author), USN,CTR WARFARE ASSESSMENT,POMONA,CA 91769, USA. NR 13 TC 2 Z9 2 U1 0 U2 0 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0008-4204 J9 CAN J PHYS JI Can. J. Phys. PD DEC PY 1990 VL 68 IS 12 BP 1454 EP 1455 PG 2 WC Physics, Multidisciplinary SC Physics GA FC305 UT WOS:A1990FC30500015 ER PT J AU KLAUSNER, JM GOLDMAN, G SKORNICK, Y VALERI, R INBAR, M SHEPRO, D HECHTMAN, HB AF KLAUSNER, JM GOLDMAN, G SKORNICK, Y VALERI, R INBAR, M SHEPRO, D HECHTMAN, HB TI INTERLEUKIN-2-INDUCED LUNG PERMEABILITY IS MEDIATED BY LEUKOTRIENE-B4 SO CANCER LA English DT Article C1 HARVARD UNIV,BRIGHAM & WOMENS HOSP,SCH MED,DEPT SURG,BOSTON,MA 02115. BOSTON UNIV,SCH MED,USN,BLOOD RES LAB,BOSTON,MA 02118. BOSTON UNIV,CTR BIOL SCI,BOSTON,MA 02215. RP KLAUSNER, JM (reprint author), TEL AVIV MED CTR & SCH MED,ROKACH HADASSAH HOSP,SACKLER FAC MED,DEPT SURG,8 BALFOUR ST,POB 51,TEL AVIV,ISRAEL. FU NHLBI NIH HHS [HL16714-13]; NIGMS NIH HHS [GM24891-10, GM 35141-03] NR 38 TC 17 Z9 17 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 0008-543X J9 CANCER JI Cancer PD DEC 1 PY 1990 VL 66 IS 11 BP 2357 EP 2364 DI 10.1002/1097-0142(19901201)66:11<2357::AID-CNCR2820661118>3.0.CO;2-J PG 8 WC Oncology SC Oncology GA EL262 UT WOS:A1990EL26200017 PM 2173970 ER PT J AU MEHL, JK SCHIEMAN, G DITTRICH, H BUCHBINDER, M AF MEHL, JK SCHIEMAN, G DITTRICH, H BUCHBINDER, M TI EMERGENT SAPHENOUS-VEIN GRAFT STENTING FOR ACUTE OCCLUSION DURING PERCUTANEOUS TRANSLUMINAL CORONARY ANGIOPLASTY SO CATHETERIZATION AND CARDIOVASCULAR DIAGNOSIS LA English DT Article C1 UNIV CALIF SAN DIEGO,MED CTR,H-811A,225 W DICKINSON ST,SAN DIEGO,CA 92103. USN HOSP,DEPT CARDIOL,SAN DIEGO,CA 92134. NR 19 TC 8 Z9 8 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 0098-6569 J9 CATHETER CARDIO DIAG JI Catheter. Cardiovasc. Diagn. PD DEC PY 1990 VL 21 IS 4 BP 266 EP 270 DI 10.1002/ccd.1810210414 PG 5 WC Cardiac & Cardiovascular Systems SC Cardiovascular System & Cardiology GA EL906 UT WOS:A1990EL90600012 PM 2276201 ER PT J AU KAMGARPARSI, B KAMGARPARSI, B WECHSLER, H AF KAMGARPARSI, B KAMGARPARSI, B WECHSLER, H TI SIMULTANEOUS FITTING OF SEVERAL PLANES TO POINT SETS USING NEURAL NETWORKS SO COMPUTER VISION GRAPHICS AND IMAGE PROCESSING LA English DT Article C1 USN,RES LAB,WASHINGTON,DC 20375. GEORGE MASON UNIV,DEPT COMP SCI,FAIRFAX,VA 22030. RP KAMGARPARSI, B (reprint author), UNIV MARYLAND,COMP VISION LAB,CTR AUTOMAT RES,COLLEGE PK,MD 20742, USA. NR 9 TC 13 Z9 13 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 0734-189X J9 COMPUT VISION GRAPH PD DEC PY 1990 VL 52 IS 3 BP 341 EP 359 DI 10.1016/0734-189X(90)90080-F PG 19 WC Computer Science, Artificial Intelligence; Imaging Science & Photographic Technology SC Computer Science; Imaging Science & Photographic Technology GA EJ276 UT WOS:A1990EJ27600003 ER PT J AU RUDOLPH, AS CLIFF, RO AF RUDOLPH, AS CLIFF, RO TI DRY STORAGE OF LIPOSOME-ENCAPSULATED HEMOGLOBIN - A BLOOD SUBSTITUTE SO CRYOBIOLOGY LA English DT Article C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. RP RUDOLPH, AS (reprint author), USN,RES LAB,BIOMOLEC ENGN BRANCH,CODE 6190,WASHINGTON,DC 20375, USA. NR 18 TC 36 Z9 36 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 0011-2240 J9 CRYOBIOLOGY JI Cryobiology PD DEC PY 1990 VL 27 IS 6 BP 585 EP 590 DI 10.1016/S0011-2240(05)80025-2 PG 6 WC Biology; Physiology SC Life Sciences & Biomedicine - Other Topics; Physiology GA EL715 UT WOS:A1990EL71500002 PM 2286095 ER PT J AU ROGERS, PA AF ROGERS, PA TI THE DIALYSIS UNIT SO DIALYSIS & TRANSPLANTATION LA English DT Article RP ROGERS, PA (reprint author), USN HOSP,BRANCH MED CLIN,FLEET MENTAL HLTH UNIT,SAN DIEGO,CA 92134, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CREATIVE AGE PUBL PI VAN NUYS PA 7628 DENSMORE AVE, VAN NUYS, CA 91406-2088 SN 0090-2934 J9 DIALYSIS TRANSPLANT JI Dial. Transplant. PD DEC PY 1990 VL 19 IS 12 BP 670 EP & PG 0 WC Engineering, Biomedical; Transplantation; Urology & Nephrology SC Engineering; Transplantation; Urology & Nephrology GA EM142 UT WOS:A1990EM14200009 ER PT J AU ALDERTON, DL LARSON, GE AF ALDERTON, DL LARSON, GE TI DIMENSIONALITY OF RAVEN ADVANCED PROGRESSIVE MATRICES ITEMS SO EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT LA English DT Article RP ALDERTON, DL (reprint author), USN,CTR PERSONNEL RES & DEV,DEPT TESTING SYST,SAN DIEGO,CA 92132, USA. NR 15 TC 31 Z9 32 U1 1 U2 2 PU SAGE SCIENCE PRESS PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 SN 0013-1644 J9 EDUC PSYCHOL MEAS JI Educ. Psychol. Meas. PD WIN PY 1990 VL 50 IS 4 BP 887 EP 900 DI 10.1177/0013164490504019 PG 14 WC Psychology, Educational; Mathematics, Interdisciplinary Applications; Psychology, Mathematical SC Psychology; Mathematics GA EM581 UT WOS:A1990EM58100019 ER PT J AU FRANKLIN, DP LAUX, DC WILLIAMS, TJ FALK, MC COHEN, PS AF FRANKLIN, DP LAUX, DC WILLIAMS, TJ FALK, MC COHEN, PS TI GROWTH OF SALMONELLA-TYPHIMURIUM SL5319 AND ESCHERICHIA-COLI F-18 IN MOUSE CECAL MUCUS - ROLE OF PEPTIDES AND IRON SO FEMS MICROBIOLOGY ECOLOGY LA English DT Article; Proceedings Paper CT SYMP ON NUTRIENT LIMITATION : GLOBAL RESPONSES AND PROKARYOTIC DEVELOPMENT CY MAR 18-20, 1990 CL GOTHENBURG, SWEDEN SP SWEDISH NAT SCI RES COUNCIL, NATL SWEDISH ENVIRONM PROTECT BOARD, BIO VAST FDN BIOTECHNOL, CITY COUNCIL GOTHENBURG, SWEDISH SOC MICROBIOL DE INTESTINAL COLONIZATION; ENTEROCHELIN; AEROBACTIN; PEPTIDES ID LARGE-INTESTINE; STRAIN; COLONIZATION; ENTEROBACTIN; PENETRATION; TRANSPORT; ADHESION; MUTANTS AB Escherichia coli F-18, a normal human fecal isolate, and Salmonella typhimurium SL5319, an avirulent strain, are known to colonize the streptomycin-treated CD-1 mouse large intestine by utilizing nutrients present in intestinal mucus for growth. Moreover, previous experiments suggested the possibility that E. coli F-18 and S. typhimurium SL5319 utilized different mucus nutrients. Therefore, mouse cecal mucus was fractionated into high and low molecular weight components, and each fraction was inoculated either simultaneously or separately with E. coli F-18 and S. typhimurium L5319. A 50 kd fraction was found in which the growth of S. typhimurium SL5319 suppressed growth of E. coli F-18. Evidence is presented that in this fraction S. typhimurium SL5319 utilizes peptides, presumably generated by mucus proteases, as a source of amino acids for growth. Furthermore, it is shown that S. typhimurium SL5319 grows in this 50 kd fraction with a generation time of 27 min in the presence of at most 7-mu-g of carbohydrate per ml and 22-mu-g of peptide per ml, and that S. typhimurium SL5319 suppresses E. coli F-18 growth in this fraction by sequestering iron. The data are discussed with respect to the role of peptide utilization and iron sequestration in the ability of S. typhimurium SL5319 to colonize the mouse large intestine. C1 UNIV RHODE ISL,DEPT MICROBIOL,KINGSTON,RI 02881. USN,MED RES INST,BETHESDA,MD 20814. NR 22 TC 11 Z9 12 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-6496 J9 FEMS MICROBIOL ECOL JI FEMS Microbiol. Ecol. PD DEC PY 1990 VL 74 IS 2-3 BP 229 EP 239 DI 10.1016/0378-1097(90)90557-7 PG 11 WC Microbiology SC Microbiology GA EQ130 UT WOS:A1990EQ13000014 ER PT J AU YOST, DS AF YOST, DS TI FRANCE IN THE NEW EUROPE SO FOREIGN AFFAIRS LA English DT Article RP YOST, DS (reprint author), NAVAL POST GRAD SCH,MONTEREY,CA, USA. NR 4 TC 3 Z9 3 U1 0 U2 0 PU COUNC FOREIGN RELAT INC PI NEW YORK PA 58 E 68TH ST, NEW YORK, NY 10021 SN 0015-7120 J9 FOREIGN AFF JI Foreign Aff. PD WIN PY 1990 VL 69 IS 5 BP 107 EP 128 DI 10.2307/20044604 PG 22 WC International Relations SC International Relations GA EJ301 UT WOS:A1990EJ30100007 ER PT J AU CHI, LK AF CHI, LK TI NEW COSMOLOGICAL MODELS IN THE 5-DIMENSIONAL SPACE-TIME-MASS GRAVITY THEORY SO GENERAL RELATIVITY AND GRAVITATION LA English DT Article RP CHI, LK (reprint author), USN ACAD,DEPT COMP SCI,ANNAPOLIS,MD 21402, USA. NR 7 TC 16 Z9 16 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0001-7701 J9 GEN RELAT GRAVIT JI Gen. Relativ. Gravit. PD DEC PY 1990 VL 22 IS 12 BP 1347 EP 1350 DI 10.1007/BF00756834 PG 4 WC Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA EK674 UT WOS:A1990EK67400001 ER PT J AU ROMERO, H GANGULI, G PALMADESSO, P AF ROMERO, H GANGULI, G PALMADESSO, P TI EQUILIBRIUM STRUCTURE OF THE PLASMA SHEET BOUNDARY LAYER-LOBE INTERFACE SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID MAGNETOTAIL; ISEE-1; PARTICLE; WAVES; TAIL AB Observations are presented which show that plasma parameters vary on a scale length smaller than the ion gyroradius at the interface between the plasma sheet boundary layer and the lobe. The Vlasov equation is used to investigate the properties of such a boundary layer. The existence, at the interface, of a density gradient whose scale length is smaller than the ion gyroradius implies than an electrostatis potential (e-theta approximately 2 kappa-T(e), where e and T(e) are the charge and electron temperature, respectively) is established in order to maintain quasineutrality. Strongly sheared (scale lengths smaller than the ion gyroradius) perpendicular and parallel (to the ambient magnetic field) electron flows develop whose peak velocities are on the order of the electron thermal speed and which carry a n et current. The free energy of the sheared flows can give rise to a broadband spectrum of electrostatic instabilities starting near the electron plasma frequency and extending below the lower hybrid frequency. RP ROMERO, H (reprint author), USN,RES LAB,DIV PLASMA PHYS,SPACE PLASMA BRANCH,WASHINGTON,DC 20375, USA. NR 17 TC 32 Z9 32 U1 0 U2 1 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 DEC PY 1990 VL 17 IS 13 BP 2313 EP 2316 DI 10.1029/GL017i013p02313 PG 4 WC Geosciences, Multidisciplinary SC Geology GA EN701 UT WOS:A1990EN70100009 ER PT J AU LINNOILA, I AF LINNOILA, I TI PATHOLOGY OF NON-SMALL-CELL LUNG-CANCER - NEW DIAGNOSTIC APPROACHES SO HEMATOLOGY-ONCOLOGY CLINICS OF NORTH AMERICA LA English DT Review RP LINNOILA, I (reprint author), USN HOSP,NCI,MED ONCOL BRANCH,BLDG 8,ROOM 5101,BETHESDA,MD 20814, USA. NR 144 TC 36 Z9 37 U1 0 U2 3 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0889-8588 J9 HEMATOL ONCOL CLIN N JI Hematol. Oncol. Clin. North Am. PD DEC PY 1990 VL 4 IS 6 BP 1027 EP 1051 PG 25 WC Oncology; Hematology SC Oncology; Hematology GA EL331 UT WOS:A1990EL33100002 PM 1962774 ER PT J AU SAKS, NS BROWN, DB AF SAKS, NS BROWN, DB TI OBSERVATION OF H+ MOTION DURING INTERFACE TRAP FORMATION SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE RP SAKS, NS (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 31 TC 60 Z9 60 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1990 VL 37 IS 6 BP 1624 EP 1631 DI 10.1109/23.101170 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200004 ER PT J AU STAHLBUSH, RE MRSTIK, BJ LAWRENCE, RK AF STAHLBUSH, RE MRSTIK, BJ LAWRENCE, RK TI POSTIRRADIATION BEHAVIOR OF THE INTERFACE STATE DENSITY AND THE TRAPPED POSITIVE CHARGE SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE C1 ARACOR,TEMPLE HILLS,MD 20748. RP STAHLBUSH, RE (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 26 TC 80 Z9 82 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1990 VL 37 IS 6 BP 1641 EP 1649 DI 10.1109/23.101173 PN 1 PG 9 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200006 ER PT J AU XAPSOS, MA FREITAG, RK DOZIER, CM BROWN, DB SUMMERS, GP BURKE, EA SHAPIRO, P AF XAPSOS, MA FREITAG, RK DOZIER, CM BROWN, DB SUMMERS, GP BURKE, EA SHAPIRO, P TI SEPARATION OF RADIATION-INDUCED AND PROCESS INDUCED LATERAL NONUNIFORMITIES SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE C1 SPIRE CORP,BEDFORD,MA 01730. SACHS FREEMAN ASSOCIATES INC,LANDOVER,MD. UNIV MARYLAND,BALTIMORE,MD 21201. RP XAPSOS, MA (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 10 TC 9 Z9 10 U1 1 U2 2 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 DEC PY 1990 VL 37 IS 6 BP 1677 EP 1681 DI 10.1109/23.101176 PN 1 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200010 ER PT J AU KLEIN, RB SAKS, NS SHANFIELD, Z AF KLEIN, RB SAKS, NS SHANFIELD, Z TI SATURATION OF RADIATION-INDUCED THRESHOLD-VOLTAGE SHIFTS IN THIN-OXIDE MOSFETS AT 80-K SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE C1 USN,RES LAB,WASHINGTON,DC 20375. NR 28 TC 7 Z9 8 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 DEC PY 1990 VL 37 IS 6 BP 1690 EP 1695 DI 10.1109/23.101178 PN 1 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200012 ER PT J AU CARLONE, C BERNIER, G TANNOUS, E KHANNA, SM ANDERSON, WT GERDES, JW AF CARLONE, C BERNIER, G TANNOUS, E KHANNA, SM ANDERSON, WT GERDES, JW TI THE PHOTOLUMINESCENT SPECTRUM OF NEUTRON-IRRADIATED GAAS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE C1 UNIV SHERBROOKE,CTR RECH PHYS SOLIDE,SHERBROOKE J1K 2R1,QUEBEC,CANADA. DEF RES ESTAB,OTTAWA K1A 0Z4,ONTARIO,CANADA. USN,RES LAB,WASHINGTON,DC 20375. USA,PULSE RADIAT FACIL,ABERDEEN PROVING GROUND,MD 21010. RP CARLONE, C (reprint author), UNIV SHERBROOKE,DEPT PHYS,SHERBROOKE J1K 2R1,QUEBEC,CANADA. NR 20 TC 9 Z9 9 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 DEC PY 1990 VL 37 IS 6 BP 1718 EP 1725 DI 10.1109/23.101182 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200016 ER PT J AU MARSHALL, PW DALE, CJ BURKE, EA AF MARSHALL, PW DALE, CJ BURKE, EA TI PROTON-INDUCED DISPLACEMENT DAMAGE DISTRIBUTIONS AND EXTREMES IN SILICON MICROVOLUMES SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE C1 SACHS FREEMAN ASSOCIATES INC,LANDOVER,MD 20785. SPIRE CORP,BEDFORD,MA 01730. RP MARSHALL, PW (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 10 TC 50 Z9 51 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 DEC PY 1990 VL 37 IS 6 BP 1776 EP 1783 DI 10.1109/23.101191 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200025 ER PT J AU DALE, CJ MARSHALL, PW BURKE, EA AF DALE, CJ MARSHALL, PW BURKE, EA TI PARTICLE-INDUCED SPATIAL DARK CURRENT FLUCTUATIONS IN FOCAL PLANE ARRAYS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE C1 SACHS FREEMAN ASSOCIATES INC,LANDOVER,MD 20785. SPIRE CORP,BEDFORD,MA 01730. RP DALE, CJ (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 24 TC 38 Z9 38 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 DEC PY 1990 VL 37 IS 6 BP 1784 EP 1791 DI 10.1109/23.101192 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200026 ER PT J AU BUCHNER, S KANG, K STAPOR, WJ CAMPBELL, AB KNUDSON, AR MCDONALD, P RIVET, S AF BUCHNER, S KANG, K STAPOR, WJ CAMPBELL, AB KNUDSON, AR MCDONALD, P RIVET, S TI PULSED LASER-INDUCED SEU IN INTEGRATED-CIRCUITS - A PRACTICAL METHOD FOR HARDNESS ASSURANCE TESTING SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE C1 USN,RES LAB,WASHINGTON,DC 20375. HARRIS SEMICOND CORP,MELBOURNE,FL 32302. RP BUCHNER, S (reprint author), MARTIN MARIETTA CORP LABS,BALTIMORE,MD 21227, USA. NR 9 TC 39 Z9 42 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1990 VL 37 IS 6 BP 1825 EP 1831 DI 10.1109/23.101196 PN 1 PG 7 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200030 ER PT J AU TURFLINGER, TL DAVEY, MV AF TURFLINGER, TL DAVEY, MV TI UNDERSTANDING SINGLE EVENT PHENOMENA IN COMPLEX ANALOG AND DIGITAL INTEGRATED-CIRCUITS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE RP TURFLINGER, TL (reprint author), USN,CTR WEAP SUPPORT,CRANE,IN 47522, USA. NR 6 TC 13 Z9 13 U1 1 U2 1 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 DEC PY 1990 VL 37 IS 6 BP 1832 EP 1838 DI 10.1109/23.101197 PN 1 PG 7 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200031 ER PT J AU MCMORROW, D KNUDSON, AR CAMPBELL, AB AF MCMORROW, D KNUDSON, AR CAMPBELL, AB TI FAST CHARGE COLLECTION IN GAAS-MESFETS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE RP MCMORROW, D (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 14 TC 25 Z9 25 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1990 VL 37 IS 6 BP 1902 EP 1908 DI 10.1109/23.101207 PN 1 PG 7 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200041 ER PT J AU KNUDSON, AR CAMPBELL, AB MCMORROW, D BUCHNER, S KANG, K WEATHERFORD, T SRINIVAS, V SWARTZLANDER, GA CHEN, YJ AF KNUDSON, AR CAMPBELL, AB MCMORROW, D BUCHNER, S KANG, K WEATHERFORD, T SRINIVAS, V SWARTZLANDER, GA CHEN, YJ TI PULSED LASER-INDUCED CHARGE COLLECTION IN GAAS-MESFETS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE C1 MARTIN MARIETTA CORP LABS,BALTIMORE,MD 21227. UNIV MARYLAND,BALTIMORE,MD 21201. RP KNUDSON, AR (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. OI Swartzlander, Grover/0000-0003-3513-2225 NR 13 TC 16 Z9 16 U1 0 U2 4 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 DEC PY 1990 VL 37 IS 6 BP 1909 EP 1915 DI 10.1109/23.101208 PN 1 PG 7 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200042 ER PT J AU NORMAND, E STAPOR, WJ AF NORMAND, E STAPOR, WJ TI VARIATION IN PROTON-INDUCED UPSETS RATES FROM LARGE SOLAR-FLARES USING AN IMPROVED SEU MODEL SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE C1 USN,RES LAB,WASHINGTON,DC 20375. RP NORMAND, E (reprint author), BOEING AEROSP & ELECTR,POB 3999,MS 87-60,SEATTLE,WA 98124, USA. NR 19 TC 15 Z9 15 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 DEC PY 1990 VL 37 IS 6 BP 1947 EP 1952 DI 10.1109/23.101213 PN 1 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200047 ER PT J AU STAPOR, WJ MEYERS, JP LANGWORTHY, JB PETERSEN, EL AF STAPOR, WJ MEYERS, JP LANGWORTHY, JB PETERSEN, EL TI 2 PARAMETER BENDEL MODEL-CALCULATIONS FOR PREDICTING PROTON-INDUCED UPSET SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE RP STAPOR, WJ (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 15 TC 47 Z9 50 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 DEC PY 1990 VL 37 IS 6 BP 1966 EP 1973 DI 10.1109/23.101216 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200050 ER PT J AU STESMAN, A DEVINE, R REVESZ, AG HUGHES, H AF STESMAN, A DEVINE, R REVESZ, AG HUGHES, H TI IRRADIATION-INDUCED ESR ACTIVE DEFECTS IN SIMOX STRUCTURES SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE C1 CTR NATL ETUD TELECOMMUN,F-38243 MEYLAN,FRANCE. REVESZ ASSOCIATES,BETHESDA,MD 20817. USN,RES LAB,DIV ELECTR SCI & TECH,WASHINGTON,DC 20375. RP STESMAN, A (reprint author), UNIV LOUVAIN,DEPT PHYS,B-3030 LOUVAIN,BELGIUM. NR 23 TC 43 Z9 43 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1990 VL 37 IS 6 BP 2008 EP 2012 DI 10.1109/23.101222 PN 1 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200056 ER PT J AU KUB, FJ YAO, CT WATERMAN, JR AF KUB, FJ YAO, CT WATERMAN, JR TI RADIATION HARDENED SOS MOSFET TECHNOLOGY FOR INFRARED FOCAL PLANE READOUTS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE RP KUB, FJ (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 13 TC 7 Z9 7 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 DEC PY 1990 VL 37 IS 6 BP 2020 EP 2025 DI 10.1109/23.101224 PN 1 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200058 ER PT J AU MORIWAKI, MM SROUR, JR LOU, LF WATERMAN, JR AF MORIWAKI, MM SROUR, JR LOU, LF WATERMAN, JR TI IONIZING-RADIATION EFFECTS ON HGCDTE MIS DEVICES SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE C1 USN,RES LAB,WASHINGTON,DC 20375. RP MORIWAKI, MM (reprint author), NORTHROP CORP,DIV ELECTR SYST,HAWTHORNE,CA 90251, USA. NR 27 TC 5 Z9 6 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1990 VL 37 IS 6 BP 2034 EP 2041 DI 10.1109/23.101226 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200060 ER PT J AU ANDERSON, WT KNUDSON, AR MEULENBERG, A HUNG, HL ROUSSOS, JA KIRIAKIDIS, G AF ANDERSON, WT KNUDSON, AR MEULENBERG, A HUNG, HL ROUSSOS, JA KIRIAKIDIS, G TI HEAVY-ION TOTAL FLUENCE EFFECTS IN GAAS DEVICES SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE C1 COMSAT LABS,CLARKSBURG,MD 20871. RES CTR CRETE,HERAKLION,GREECE. RP ANDERSON, WT (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Kiriakidis, George/G-9685-2011; Meulenberg, Andrew/K-4194-2012 OI Meulenberg, Andrew/0000-0003-3570-4705 NR 12 TC 6 Z9 6 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 DEC PY 1990 VL 37 IS 6 BP 2065 EP 2070 DI 10.1109/23.101230 PN 1 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200064 ER PT J AU DESKO, JC DARWISH, MN DOLLY, MC GOODWIN, CA DAWES, WR TITUS, JL AF DESKO, JC DARWISH, MN DOLLY, MC GOODWIN, CA DAWES, WR TITUS, JL TI RADIATION HARDENING OF A HIGH-VOLTAGE IC TECHNOLOGY (BCDMOS) SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1990 IEEE ANNUAL CONF ON NUCLEAR AND SPACE RADIATION EFFECTS CY JUL 16-20, 1990 CL RENO, NV SP IEEE C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. USN,CTR WEAP SUPPORT,CRANE,IN 47522. RP DESKO, JC (reprint author), AT&T BELL LABS,READING,PA 19603, USA. NR 4 TC 4 Z9 4 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 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD DEC PY 1990 VL 37 IS 6 BP 2083 EP 2088 DI 10.1109/23.101234 PN 1 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA EM492 UT WOS:A1990EM49200067 ER PT J AU GOLD, SH FLIFLET, AW MANHEIMER, WM KIRKPATRICK, DA BLACK, WM KINKEAD, AK HARDESTY, DL SUCY, MS AF GOLD, SH FLIFLET, AW MANHEIMER, WM KIRKPATRICK, DA BLACK, WM KINKEAD, AK HARDESTY, DL SUCY, MS TI MILLIMETER-WAVE GYROKLYSTRON AMPLIFIER EXPERIMENT USING A RELATIVISTIC ELECTRON-BEAM SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article C1 SCI APPLICAT INT CORP,MCLEAN,VA 22102. GEORGE MASON UNIV,DEPT ELECT & COMP ENGN,FAIRFAX,VA 22021. RP GOLD, SH (reprint author), USN,RES LAB,DIV PLASMA PHYS,BEAM PHYS BRANCH,WASHINGTON,DC 20375, USA. NR 18 TC 4 Z9 4 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 0093-3813 J9 IEEE T PLASMA SCI JI IEEE Trans. Plasma Sci. PD DEC PY 1990 VL 18 IS 6 BP 1021 EP 1027 DI 10.1109/27.61518 PG 7 WC Physics, Fluids & Plasmas SC Physics GA EM925 UT WOS:A1990EM92500025 ER PT J AU ZVIRAN, M AF ZVIRAN, M TI ISSPSS - A DECISION SUPPORT SYSTEM FOR INFORMATION-SYSTEMS STRATEGIC-PLANNING SO INFORMATION & MANAGEMENT LA English DT Article DE DECISION SUPPORT SYSTEMS (DSS); IS PLANNING; STRATEGIC PLANNING; IS OBJECTIVES; ORGANIZATIONAL OBJECTIVES; HARDWARE POLICY ID KEY ISSUES; MIS; ARCHIPELAGO AB This paper describes a Decision Support System (DSS) for strategic planning of Information Systems (IS) named ISSPSS (Information Systems Strategic Planning Support System) and the experience of its implementation. The system addresses three core issues of the IS strategic planning process: identifying the importance and role of information systems in the organization, defining IS objectives based on organizational objectives and critical success factors and formulating hardware distribution policy. The system's output is designed to guide an organization in formulating a policy for organizational information resource. RP ZVIRAN, M (reprint author), NAVAL POST GRAD SCH,DEPT ADM SCI,MONTEREY,CA 93943, USA. NR 33 TC 4 Z9 4 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7206 J9 INFORM MANAGE JI Inf. Manage. PD DEC PY 1990 VL 19 IS 5 BP 345 EP 359 DI 10.1016/0378-7206(90)90048-M PG 15 WC Computer Science, Information Systems; Information Science & Library Science; Management SC Computer Science; Information Science & Library Science; Business & Economics GA EP643 UT WOS:A1990EP64300006 ER PT J AU KARLE, J AF KARLE, J TI THE ROLE OF MOTIVATION IN SCIENTIFIC-RESEARCH .2. A VIEW OF CREATIVITY SO INTERDISCIPLINARY SCIENCE REVIEWS LA English DT Article ID RECOVERING PHASE INFORMATION; INTENSITY DATA; NOBEL LECTURE AB It is emphasized that creativity is characterized by the discovery of new connections among conceptual or substantive matters or both. Motivation and persistence play a very important role in an individual's pursuit of the creative process. A person's capacity for thought generally needs to be learned. The discovery of the manner in which one's mind can be used in the creative process is in itself very fascinating. How the brain actually works is very poorly comprehended at this time. That need not inhibit its use or the development of its capacity as best one can. In scientific creativity, there is a very strong interplay between experiment and theory with both aspects of science evolving together. The prime feature of the scientific method is the use of evidence to justify conclusions. No matter how persuasive a concept, a model or a theory appears to be, until it is confirmed by observation it remains only a hypothesis. As an illustration of scientific creativity, a developing technique for determining the atomic arrangements in macromolecules is discussed. This technique takes advantage of the anomalous dispersion of an incident X-ray beam. Anomalous dispersion arises from absorption processes in atoms that comprise the structure, and the net effect is a pattern of X-ray scattering that contains more information than would be obtained if the scattering were normal. In a postscript, the question is raised whether an enhanced sensitivity to creativity throughout societies could materially diminish man's destructive and exploitive predilections. RP KARLE, J (reprint author), USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375, USA. NR 17 TC 3 Z9 3 U1 1 U2 5 PU INST MATERIALS PI LONDON PA 1 CARLTON HOUSE TERRACE, LONDON, ENGLAND SW1Y 5DB SN 0308-0188 J9 INTERDISCIPL SCI REV JI Interdiscip. Sci. Rev. PD DEC PY 1990 VL 15 IS 4 BP 357 EP 363 PG 7 WC Multidisciplinary Sciences; Social Sciences, Interdisciplinary SC Science & Technology - Other Topics; Social Sciences - Other Topics GA EU139 UT WOS:A1990EU13900011 ER PT J AU HAYES, RB BROWN, LM POTTERN, LM GOMEZ, M KARDAUN, JWPF HOOVER, RN OCONNELL, KJ SUTZMAN, RE JAVADPOUR, N AF HAYES, RB BROWN, LM POTTERN, LM GOMEZ, M KARDAUN, JWPF HOOVER, RN OCONNELL, KJ SUTZMAN, RE JAVADPOUR, N TI OCCUPATION AND RISK FOR TESTICULAR CANCER - A CASE-CONTROL STUDY SO INTERNATIONAL JOURNAL OF EPIDEMIOLOGY LA English DT Article ID NATURAL-GAS EXTRACTION; UNITED-STATES; YOUNG MEN; TESTIS; EPIDEMIOLOGY; TUMORS; AGRICULTURE; EMPLOYMENT; EXPOSURE; DENMARK AB A case-control study of 271 testicular cancer cases aged 18-42, including 60 seminomas and 206 other germinal cell tumours, and 259 controls was carried out to study the association between occupation and testicular cancer risk. Study subjects were identified at three medical centres, two of which treat military personnel. Controls were men diagnosed with a cancer other than of the genital tract. Associations were identified between professional employment (administrators, teachers and other professionals) and risk for testicular seminoma, OR = 2.8 (95% Cl: 1.4-5.4) and between employment in production work and risk for other germinal cell tumours, OR = 1.8 (95% Cl: 1.1-2.7). No specific occupations within these broad groups were responsible for the observed increases. Self-reported exposure to microwaves and other radio waves was associated with an excess risk for both seminomas and other germinal cell tumours. However, an assessment of radio wave exposure based on job title did not support this finding. Although testicular cancer has been increasing in recent decades among young males, occupational factors did not appear to account for a substantial proportion of testicular cancer occurrence in the population studied. C1 NCI,DIV CANC TREATMENT,BETHESDA,MD 20892. USN HOSP,UNIFORMED SERV UNIV HLTH SCI,BETHESDA,MD 20814. WALTER REED ARMY MED CTR,UNIFORMED SERV UNIV HLTH SCI,WASHINGTON,DC 20307. RP HAYES, RB (reprint author), NCI,ENVIRONM EPIDEMIOL BRANCH,EPIDEMIOL & BIOSTAT PROGRAM,EPN 418,BETHESDA,MD 20892, USA. NR 36 TC 44 Z9 44 U1 1 U2 2 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0300-5771 J9 INT J EPIDEMIOL JI Int. J. Epidemiol. PD DEC PY 1990 VL 19 IS 4 BP 825 EP 831 DI 10.1093/ije/19.4.825 PG 7 WC Public, Environmental & Occupational Health SC Public, Environmental & Occupational Health GA ET595 UT WOS:A1990ET59500008 PM 1964675 ER PT J AU LIGRANI, PM SCHWARTZ, GE AF LIGRANI, PM SCHWARTZ, GE TI CONTROL OF EMBEDDED LONGITUDINAL VORTICES USING A WALL JET SO INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW LA English DT Article DE LONGITUDINAL VORTEX; WALL JET; VORTEX CONTROL; INJECTANT; TURBULENT BOUNDARY LAYER AB A wall jet is used to alter and control the structural characteristics of streamwise vortices embedded in turbulent boundary layers developing in zero pressure gradients. Results from four different vortex/wall jet configurations show that the most significant alterations to vortex structure are obtained with the jet opposing the vortex downwash and the ratio of vortex circulation to injection velocity times hole diameter, S, less than about 1.0. As the blowing ratio (ratio of injectant mass flux to freestream mass flux) increases from 0 to 4.8 in this situation, measurements 41.9 hole diameters downstream from the injection site show that circulation decreases from 0.15 to 0.05 m2/s, average vortex core radius increases from 0.89 to 2.2 cm, and the vortex moves 3 cm in the spanwise direction toward the jet centerline. The most dramatic alterations to vortex structure occur as the blowing ratio increases from 2.1 to 3.0 and consist of reductions to streamwise vorticity magnitudes, convection of jet and freestream fluid into vortex core regions, enlargement of vortex cross sections, and changes to vortex cross-sectional shapes. RP LIGRANI, PM (reprint author), NAVAL POST GRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93943, USA. NR 0 TC 5 Z9 5 U1 0 U2 0 PU BUTTERWORTH-HEINEMANN PI WOBURN PA 225 WILDWOOD AVE #UNITB PO BOX 4500, WOBURN, MA 01801-2084 SN 0142-727X J9 INT J HEAT FLUID FL JI Int. J. Heat Fluid Flow PD DEC PY 1990 VL 11 IS 4 BP 274 EP 283 DI 10.1016/0142-727X(90)90050-L PG 10 WC Thermodynamics; Engineering, Mechanical; Mechanics SC Thermodynamics; Engineering; Mechanics GA EP742 UT WOS:A1990EP74200001 ER PT J AU ROWE, NC RICHBOURG, RF AF ROWE, NC RICHBOURG, RF TI AN EFFICIENT SNELL LAW METHOD FOR OPTIMAL-PATH PLANNING ACROSS MULTIPLE 2-DIMENSIONAL, IRREGULAR, HOMOGENEOUS-COST REGIONS SO INTERNATIONAL JOURNAL OF ROBOTICS RESEARCH LA English DT Article RP ROWE, NC (reprint author), USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943, USA. NR 23 TC 22 Z9 22 U1 0 U2 0 PU MIT PRESS PI CAMBRIDGE PA 55 HAYWARD ST JOURNALS DEPT, CAMBRIDGE, MA 02142 SN 0278-3649 J9 INT J ROBOT RES JI Int. J. Robot. Res. PD DEC PY 1990 VL 9 IS 6 BP 48 EP 66 DI 10.1177/027836499000900605 PG 19 WC Robotics SC Robotics GA EL891 UT WOS:A1990EL89100005 ER PT J AU ROWE, NC AF ROWE, NC TI ROADS, RIVERS, AND OBSTACLES - OPTIMAL 2-DIMENSIONAL PATH PLANNING AROUND LINEAR FEATURES FOR A MOBILE AGENT SO INTERNATIONAL JOURNAL OF ROBOTICS RESEARCH LA English DT Note RP ROWE, NC (reprint author), USN,POSTGRAD SCH,DEPT COMP SCI,MONTEREY,CA 93943, USA. NR 10 TC 10 Z9 10 U1 0 U2 0 PU MIT PRESS PI CAMBRIDGE PA 55 HAYWARD ST JOURNALS DEPT, CAMBRIDGE, MA 02142 SN 0278-3649 J9 INT J ROBOT RES JI Int. J. Robot. Res. PD DEC PY 1990 VL 9 IS 6 BP 67 EP 74 DI 10.1177/027836499000900606 PG 8 WC Robotics SC Robotics GA EL891 UT WOS:A1990EL89100006 ER PT J AU DICK, SJ AF DICK, SJ TI HISTORY OF THE ROYAL-ASTRONOMICAL-SOCIETY - TAYLOR,RJ SO ISIS LA English DT Book Review RP DICK, SJ (reprint author), USN OBSERV,WASHINGTON,DC 20390, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0021-1753 J9 ISIS JI Isis PD DEC PY 1990 VL 81 IS 309 BP 796 EP 797 DI 10.1086/355613 PG 2 WC History & Philosophy Of Science SC History & Philosophy of Science GA EW590 UT WOS:A1990EW59000079 ER PT J AU ILCISIN, KJ FELDMAN, U SCHWOB, JL WOUTERS, A SUCKEWER, S AF ILCISIN, KJ FELDMAN, U SCHWOB, JL WOUTERS, A SUCKEWER, S TI NOVEL TARGET CONFIGURATIONS FOR SELECTIVE IONIZATION STATE STUDIES IN MOLYBDENUM SO JOURNAL OF APPLIED PHYSICS LA English DT Article C1 USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. HEBREW UNIV JERUSALEM,RACAH INST PHYS,JERUSALEM,ISRAEL. RP ILCISIN, KJ (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. NR 7 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD DEC 1 PY 1990 VL 68 IS 11 BP 5422 EP 5427 DI 10.1063/1.347192 PG 6 WC Physics, Applied SC Physics GA EM120 UT WOS:A1990EM12000003 ER PT J AU SPENCER, ND PEREIRA, CJ GRASSELLI, RK AF SPENCER, ND PEREIRA, CJ GRASSELLI, RK TI THE EFFECT OF SODIUM ON THE MOO3-SIO2-CATALYZED PARTIAL OXIDATION OF METHANE SO JOURNAL OF CATALYSIS LA English DT Article C1 OFF NAVAL RES,DIV CHEM,ARLINGTON,VA 22217. GEORGETOWN UNIV,DEPT CHEM,WASHINGTON,DC 20057. RP SPENCER, ND (reprint author), WR GRACE & CO CONN,DIV RES,COLUMBIA,MD 21044, USA. RI Spencer, NIcholas/A-5843-2008 OI Spencer, NIcholas/0000-0002-7873-7905 NR 16 TC 63 Z9 62 U1 1 U2 3 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9517 J9 J CATAL JI J. Catal. PD DEC PY 1990 VL 126 IS 2 BP 546 EP 554 DI 10.1016/0021-9517(90)90019-G PG 9 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA EL605 UT WOS:A1990EL60500019 ER PT J AU VIALLET, J SHARONI, Y FRUCHT, H JENSEN, RT MINNA, JD SAUSVILLE, EA AF VIALLET, J SHARONI, Y FRUCHT, H JENSEN, RT MINNA, JD SAUSVILLE, EA TI CHOLERA-TOXIN INHIBITS SIGNAL TRANSDUCTION BY SEVERAL MITOGENS AND THE INVITRO GROWTH OF HUMAN SMALL-CELL LUNG-CANCER SO JOURNAL OF CLINICAL INVESTIGATION LA English DT Article C1 NCI,USN,MED ONCOL BRANCH,BETHESDA,MD 20814. UNIFORMED SERV UNIV HLTH SCI,DEPT MED,BETHESDA,MD 20814. NIDDKD,DIGEST DIS BRANCH,BETHESDA,MD 20892. GEORGETOWN UNIV,SCH MED,VINCENT T LOMBARDI CANC RES CTR,DEPT MED,DIV MED ONCOL,WASHINGTON,DC 20007. FU NCRR NIH HHS [RR5360] NR 45 TC 35 Z9 35 U1 0 U2 1 PU ROCKEFELLER UNIV PRESS PI NEW YORK PA 222 E 70TH STREET, NEW YORK, NY 10021 SN 0021-9738 J9 J CLIN INVEST JI J. Clin. Invest. PD DEC PY 1990 VL 86 IS 6 BP 1904 EP 1912 DI 10.1172/JCI114923 PG 9 WC Medicine, Research & Experimental SC Research & Experimental Medicine GA EL763 UT WOS:A1990EL76300019 PM 2174911 ER PT J AU DARDIS, R BEDORE, B AF DARDIS, R BEDORE, B TI CONSUMER AND WELFARE LOSSES FROM MILK MARKETING ORDERS SO JOURNAL OF CONSUMER AFFAIRS LA English DT Article ID UNITED-STATES; PROGRAM; COST C1 USN,WASHINGTON,DC 20350. RP DARDIS, R (reprint author), UNIV MARYLAND,DEPT TEXT CONSUMER ECON,COLLEGE PK,MD 20742, USA. NR 23 TC 3 Z9 3 U1 0 U2 0 PU UNIV WISCONSIN PRESS PI MADISON PA JOURNAL DIVISION, 114 N MURRAY ST, MADISON, WI 53715 SN 0022-0078 J9 J CONSUM AFF JI J. Consum. Aff. PD WIN PY 1990 VL 24 IS 2 BP 366 EP 380 PG 15 WC Business; Economics SC Business & Economics GA GA225 UT WOS:A1990GA22500008 ER PT J AU MCGONIGAL, M BERMUDEZ, VM BUTLER, JE AF MCGONIGAL, M BERMUDEZ, VM BUTLER, JE TI INFRARED REFLECTION ABSORPTION-SPECTROSCOPY STUDY OF THE CHEMISORPTION OF SMALL MOLECULES (H-2, O-2 AND H2O) ON SILICON SO JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA LA English DT Article ID AIR-WATER-INTERFACE; VIBRATIONAL SPECTROSCOPY; INSOLUBLE MONOLAYERS; SI(111)(7X7) SURFACE; EXTERNAL REFLECTION; INITIAL-STAGES; OXIDATION; SI(100); GENERATION; ADSORBATES AB For infrared reflection-absorption spectroscopy (IRRAS) in the single external reflection mode, a well-known limitation is the diminished sensitivity for adsorbates on semiconducting vs metallic substrates substrates. We describe a technique in which an optically thin semiconductor film is deposited in ultra high vacuum on a metal and spectra recorded at grazing incidence in p-polarization. Using this approach, spectra have been obtained down to 650 cm(-1) for H, O, OH and (CH3)2CHO-(isopropoxy) adsorbed at coverages of up to one monolayer on Si films (about 40 to 120 angstrom thick) on Ni(001). Isotope experiments have also been done using 18O2 and D2. The technique illustrated by these results is expected to be useful in studies of amorphous semiconductor surface chemistry and of the growth of such materials by chemical vapor deposition. RP MCGONIGAL, M (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Butler, James/B-7965-2008 OI Butler, James/0000-0002-4794-7176 NR 37 TC 20 Z9 20 U1 1 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0368-2048 J9 J ELECTRON SPECTROSC JI J. Electron Spectrosc. Relat. Phenom. PD DEC PY 1990 VL 54 BP 1033 EP 1044 DI 10.1016/0368-2048(90)80293-J PG 12 WC Spectroscopy SC Spectroscopy GA ET210 UT WOS:A1990ET21000100 ER PT J AU DEVANEY, K KRAGEL, PJ AF DEVANEY, K KRAGEL, PJ TI POSTFROZEN SECTION PROCESSING OF HUMAN TISSUE - THE INFLUENCE OF FIXATION MEDIA SO JOURNAL OF HISTOTECHNOLOGY LA English DT Article DE FORMALIN FIXATION; FROZEN SECTION; PARAFFIN SECTIONS AB Freezing tissue for intraoperative diagnosis often introduces artifacts that make subsequent histologic evaluation of routinely processed tissue difficult. While attention has been given to methods of improving the quality of the frozen section itself (microwave irradiation and pretreatment with dimethyl sulfoxide), little attention has been given to the production of optimal microscopic image quality in the permanently processed "frozen section control." One hundred sections of liver from a single human autopsy were each frozen in a cryostat in OCT compound at -20-degrees-C; the sections were then transferred to one of five postfrozen section solutions-formalin, Omnifix, Tris buffer (.05 M, pH 7.6), B5, and ethylene glycol. Routine hematoxylin and eosin sections were prepared. Each of the 100 sections was graded blindly with assessment of four features: preservation of chromatin detail, preservation of nucleoli, preservation of cytoplasmic detail, and maintenance of cell borders. The superior postfrozen medium proved to be 10% formalin, which provided a greater preservation of nuclear and cytoplasmic detail than did the other four media. RP DEVANEY, K (reprint author), USN HOSP,DEPT PATHOL,BETHESDA,MD 20815, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NATL SOC HISTOTECHNOLOGY PI BOWIE PA 4201 NORTHVIEW DR, STE 502, BOWIE, MD 20716-1073 SN 0147-8885 J9 J HISTOTECHNOL JI J. Histotechnol. PD DEC PY 1990 VL 13 IS 4 BP 289 EP 292 PG 4 WC Cell Biology SC Cell Biology GA EU495 UT WOS:A1990EU49500008 ER PT J AU MURAKAMI, S MIYAKE, K JUNE, CH KINCADE, PW HODES, RJ AF MURAKAMI, S MIYAKE, K JUNE, CH KINCADE, PW HODES, RJ TI IL-5 INDUCES A PGP-1 (CD44) BRIGHT B-CELL SUBPOPULATION THAT IS HIGHLY ENRICHED IN PROLIFERATIVE AND IG SECRETORY ACTIVITY AND BINDS TO HYALURONATE SO JOURNAL OF IMMUNOLOGY LA English DT Article C1 OKLAHOMA MED RES FDN,OKLAHOMA CITY,OK 73104. USN,MED RES INST,BETHESDA,MD 20814. RP MURAKAMI, S (reprint author), NCI,EXPTL IMMUNOL BRANCH,BLDG 10,ROOM 4B17,BETHESDA,MD 20892, USA. FU NIAID NIH HHS [AI-19884, AI-20069] NR 46 TC 110 Z9 111 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 DEC 1 PY 1990 VL 145 IS 11 BP 3618 EP 3627 PG 10 WC Immunology SC Immunology GA EK391 UT WOS:A1990EK39100012 PM 2246506 ER PT J AU CORY, DG MILLER, JB GARROWAY, AN AF CORY, DG MILLER, JB GARROWAY, AN TI DANTE SLICE SELECTION FOR SOLID-STATE NMR IMAGING SO JOURNAL OF MAGNETIC RESONANCE LA English DT Article ID NUCLEAR MAGNETIC-RESONANCE; MULTIPLE-PULSE NMR; EXCITATION; RESOLUTION; SEQUENCES; IMAGES C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. NR 27 TC 18 Z9 18 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0022-2364 J9 J MAGN RESON PD DEC PY 1990 VL 90 IS 3 BP 544 EP 550 DI 10.1016/0022-2364(90)90058-H PG 7 WC Biochemical Research Methods; Physics, Atomic, Molecular & Chemical; Spectroscopy SC Biochemistry & Molecular Biology; Physics; Spectroscopy GA EQ750 UT WOS:A1990EQ75000010 ER PT J AU BERMUDEZ, VM KAPLAN, R AF BERMUDEZ, VM KAPLAN, R TI INVESTIGATION OF THE STRUCTURE AND STABILITY OF THE PT/SIC(001) INTERFACE SO JOURNAL OF MATERIALS RESEARCH LA English DT Article RP BERMUDEZ, VM (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 40 TC 13 Z9 13 U1 0 U2 1 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD DEC PY 1990 VL 5 IS 12 BP 2882 EP 2893 DI 10.1557/JMR.1990.2882 PG 12 WC Materials Science, Multidisciplinary SC Materials Science GA EN070 UT WOS:A1990EN07000020 ER PT J AU HIGBY, PL GINTHER, RJ AGGARWAL, ID FRIEBELE, EJ AF HIGBY, PL GINTHER, RJ AGGARWAL, ID FRIEBELE, EJ TI GLASS-FORMATION AND THERMAL-PROPERTIES OF LOW-SILICA CALCIUM ALUMINOSILICATE GLASSES SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article AB Calcium aluminosilicate glasses with small percentages of silica have been prepared. The limits of glass formation at 1600-degrees-C were found to expand as silica is added to calcium aluminate base compositions. The behavior of such physical properties as glass transition temperature and transition range viscosity has indicated that the structural role of silica changes as its concentration is increased, keeping the CaO/Al2O3 ratio constant. C1 SACHS FREEMAN ASSOCIATES INC,LANDOVER,MD 20785. RP HIGBY, PL (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 13 TC 69 Z9 69 U1 1 U2 15 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD DEC PY 1990 VL 126 IS 3 BP 209 EP 215 DI 10.1016/0022-3093(90)90821-3 PG 7 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA ER293 UT WOS:A1990ER29300004 ER PT J AU TANZ, RR SHULMAN, ST SROKA, PA MARUBIO, S BROOK, I YOGEV, R AF TANZ, RR SHULMAN, ST SROKA, PA MARUBIO, S BROOK, I YOGEV, R TI LACK OF INFLUENCE OF BETA-LACTAMASE PRODUCING FLORA ON RECOVERY OF GROUP-A STREPTOCOCCI AFTER TREATMENT OF ACUTE PHARYNGITIS SO JOURNAL OF PEDIATRICS LA English DT Article C1 CHILDRENS MEM HOSP, DEPT PEDIAT, DIV INFECT DIS, CHICAGO, IL 60614 USA. NORTHWESTERN UNIV, SCH MED, CHICAGO, IL 60611 USA. USN, MED RES INST, BETHESDA, MD 20814 USA. RP TANZ, RR (reprint author), CHILDRENS MEM HOSP, DIV GEN ACAD & EMERGENCY PEDIAT, BOX 16, 2300 CHILDRENS PLAZA, CHICAGO, IL 60614 USA. NR 29 TC 45 Z9 46 U1 0 U2 0 PU MOSBY-ELSEVIER PI NEW YORK PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA SN 0022-3476 EI 1097-6833 J9 J PEDIATR-US JI J. Pediatr. PD DEC PY 1990 VL 117 IS 6 BP 859 EP 863 DI 10.1016/S0022-3476(05)80122-2 PG 5 WC Pediatrics SC Pediatrics GA EM116 UT WOS:A1990EM11600003 PM 2123240 ER EF