FN Thomson Reuters Web of Science™ VR 1.0 PT J AU McGill, RA Chung, R Chrisey, DB Dorsey, PC Matthews, P Pique, A Mlsna, TE Stepnowski, JL AF McGill, RA Chung, R Chrisey, DB Dorsey, PC Matthews, P Pique, A Mlsna, TE Stepnowski, JL TI Performance optimization of surface acoustic wave chemical sensors SO IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL LA English DT Article ID LASER-ABLATION AB Acoustic wave devices coated with a thin layer of chemoselective material provide highly sensitive chemical sensors for the detection and monitoring of vapors and gases. In this work, a variety of coating materials and coating deposition techniques have been evaluated on surface acoustic wave (SAW) devices. A novel thin film deposition technique, matrix assisted pulsed laser evaporation (MAPLE), is utilized to coat high quality polymer films on SAW devices, and conventional pulsed laser deposition is used to deposit a passivation layer of diamond-like-carbon on a SAW device surface to prevent water adsorption. In addition, chemoselective coatings are formed by covalent attachment of functionalized species to the silica surface of SAW devices. The self-assembled monolayer or near monolayer structures are designed to populate the SAW device surface with the desirable hexafluoroisopropanol moeity. The rapid kinetic signals achievable with the various coated SAW sensors during vapor tests are examined as a function of the coating material and the quality of the thin films. In parallel to the thin film deposition, growth, and vapor testing, the electrical characteristics of the SAW sensor have been characterized. The quality factor and residual phase noise of polymer coated SAW devices are examined, and a prediction of the theoretical limit of the phase noise performance of the loop oscillator is made. C1 USN, Res Lab, Washington, DC 20375 USA. Geocenters Inc, Ft Washington, MD 20744 USA. RP McGill, RA (reprint author), USN, Res Lab, Code 6670, Washington, DC 20375 USA. EM amcgill@ccf.nrl.navy.mil NR 29 TC 51 Z9 54 U1 1 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA SN 0885-3010 J9 IEEE T ULTRASON FERR JI IEEE Trans. Ultrason. Ferroelectr. Freq. Control PD SEP PY 1998 VL 45 IS 5 BP 1370 EP 1380 DI 10.1109/58.726464 PG 11 WC Acoustics; Engineering, Electrical & Electronic SC Acoustics; Engineering GA 129WX UT WOS:000076488000032 ER PT J AU Chusuei, CC Morris, RE Schreifels, JA AF Chusuei, CC Morris, RE Schreifels, JA TI Adsorption of N,N '-disalicylidene-1,2-propanediamine on 304 stainless steel SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID PHOTOELECTRON-SPECTROSCOPY; THERMAL-STABILITY; OXIDES; IRON; DECOMPOSITION; OXIDATION; OXYGEN AB The behavior of the jet fuel metal deactivator additive (MDA), N,N'-disalicylidene-1,2-propanediamine in some high-temperature tests, has raised questions concerning whether it would decompose on contact with hot metal surfaces in aircraft engines and fuel systems. The adsorption of this additive was studied on oxidized and oxide-free 304SS surfaces using X-ray photoelectron spectroscopy (XPS) and temperature-programmed desorption (TPD). XPS binding energy (BE) shifts indicated thermal decomposition on the surfaces. TPD revealed the growth of both physisorbed and chemisorbed states in accordance with the Stranski-Krastanov mechanism. MDA was only weakly chemisorbed onto the 304SS surface, with desorption energies of 47 kJ/mol on an oxidized surface and 33 kJ/mol on the oxide-free surface. These findings suggest that stainless steel would not likely contain a contiguous chemisorbed MDA multilayer that the adsorbed MDA could be removed from internal surfaces of aircraft fuel systems in regions of high-temperature and turbulent flow. C1 George Mason Univ, Dept Chem, Fairfax, VA 22030 USA. USN, Res Lab, Navy Technol Ctr Safety & Survivabil, Washington, DC 20375 USA. RP Schreifels, JA (reprint author), Texas A&M Univ, Dept Chem, POB 300012, College Stn, TX 77842 USA. EM jschreif@gmu.edu NR 52 TC 5 Z9 5 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD SEP PY 1998 VL 37 IS 9 BP 3610 EP 3617 DI 10.1021/ie980076s PG 8 WC Engineering, Chemical SC Engineering GA 119DR UT WOS:000075881000012 ER PT J AU Wang, RB Doolan, DL Charoenvit, Y Hedstrom, RC Gardner, MJ Hobart, P Tine, J Sedegah, M Fallarme, V Sacci, JB Kaur, M Klinman, DM Hoffman, SL Weiss, WR AF Wang, RB Doolan, DL Charoenvit, Y Hedstrom, RC Gardner, MJ Hobart, P Tine, J Sedegah, M Fallarme, V Sacci, JB Kaur, M Klinman, DM Hoffman, SL Weiss, WR TI Simultaneous induction of multiple antigen-specific cytotoxic T lymphocytes in nonhuman primates by immunization with a mixture of four Plasmodium falciparum DNA plasmids SO INFECTION AND IMMUNITY LA English DT Article ID SPOROZOITE SURFACE PROTEIN-2; INTRADERMAL GENE IMMUNIZATION; HUMAN MALARIA PARASITE; CIRCUMSPOROZOITE PROTEIN; RHESUS-MONKEYS; INFECTED HEPATOCYTES; VACCINE CANDIDATE; SYNTHETIC PEPTIDE; INTERFERON-GAMMA; CELL EPITOPES AB CD8(+) T cells have been implicated as critical effector cells in protective immunity against malaria parasites developing within hepatocytes, A vaccine that protects against malaria by inducing CD8(+) T cells will probably have to include multiple epitopes on the same protein or different proteins, because of parasite polymorphism and genetic restriction of T-cell responses. To determine if CD8(+) T-cell responses against multiple P. falciparum proteins can be induced in primates by immunization with plasmid DNA, rhesus monkeys were immunized intramuscularly with a mixture of DNA plasmids encoding four P. falciparum proteins or with individual plasmids. All six monkeys immunized with PfCSP DNA, seven of nine immunized with PfSSP2 DNA, and five of six immunized with PfExp-1 or PfLSA-1 DNA had detectable antigen-specific cytotoxic T lymphocytes (CTL) after in vitro restimulation of peripheral blood mononuclear cells. CTL activity was genetically restricted and dependent on CD8(+) T cells. By providing the first evidence for primates that immunization with a mixture of DNA plasmids induces CD8(+) T-cell responses against all the components of the mixture, these studies provide the foundation for multigene immunization of humans. C1 USN, Med Res Inst, Malaria Program, Rockville, MD 20889 USA. Henry M Jackson Fdn, Rockville, MD 20852 USA. Vical Inc, San Diego, CA 92121 USA. Virogenet Corp, Troy, NY 12180 USA. Univ Maryland, Dept Immunol & Microbiol, Baltimore, MD 21201 USA. US FDA, Ctr Biol Evaluat & Res, Sect Retroviral Immunol, Bethesda, MD 20892 USA. RP Weiss, WR (reprint author), USN, Med Res Inst, Malaria Program, 12300 Washington Ave, Rockville, MD 20852 USA. RI Doolan, Denise/F-1969-2015 NR 60 TC 54 Z9 59 U1 0 U2 0 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 USA SN 0019-9567 J9 INFECT IMMUN JI Infect. Immun. PD SEP PY 1998 VL 66 IS 9 BP 4193 EP 4202 PG 10 WC Immunology; Infectious Diseases SC Immunology; Infectious Diseases GA 113RF UT WOS:000075564500028 PM 9712767 ER PT J AU Appleby, DF AF Appleby, DF TI The Frankish world, 750-900 SO INTERNATIONAL HISTORY REVIEW LA English DT Book Review C1 USN Acad, Annapolis, MD 21402 USA. RP Appleby, DF (reprint author), USN Acad, Annapolis, MD 21402 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU SIMON FRASER UNIV, INT HISTORY REVIEW PI BURNABY PA EAA 2015, BURNABY, BC V5A 1S6, CANADA SN 0707-5332 J9 INT HIST REV JI Int. Hist. Rev. PD SEP PY 1998 VL 20 IS 3 BP 638 EP 640 PG 3 WC History SC History GA 132HC UT WOS:000076623400020 ER PT J AU Stern, RJ Smoot, NC AF Stern, RJ Smoot, NC TI A bathymetric overview of the Mariana forearc SO ISLAND ARC LA English DT Article DE bathymetry; forearc; Mariana arc ID CONVERGENT MARGINS; SUBDUCTION ZONES; VOLCANIC-ROCKS; SEAMARC-II; ARC; TRENCH; TROUGH; EVOLUTION; EROSION; ORIGIN AB Bathymetric data at a 200-m contour interval for the entire Mariana forearc, from south of 13 degrees N to 25 degrees N, permits the first comprehensive overview of this feature. The Mariana forearc represents a sediment-starved end-member. The forearc in its southern and central sections is divisible into a structurally complex eastern province and a less-deformed western province. Despite the absence of an accretionary complex the Mariana forearc has a well-defined outer-are high; this probably results from a greater concentration of low-density serpentinized mantle lithosphere beneath the outer forearc relative to the inner forearc. This serpentinization gradient is coupled with differing deformational styles of thinner and more brittle lithosphere beneath the outer forearc compared to thicker and more ductile lithosphere beneath the inner forearc. The bathymetric data also support models calling for extension along-strike of the forearc, reflecting an increase in are length accompanying the crescent-shaped opening of the Mariana Trough back-are basin. Both northeast and northwest ridges and grabens can be identified, with the latter restricted to the southern part of the forearc and the former widely distributed in the central and northern forearc. Northeast-oriented extensional structures are supplanted northward by long, linear northwest-trending structures that ale interpreted as left-lateral strike-slip faults. These variations in deformation along-strike of the forearc manifest a transition from nearly orthogonal convergence in the south to highly oblique convergence in the north. C1 Univ Texas, Dept Geosci, Richardson, TX 75083 USA. USN, Seafloor Data Bases Div, Oceanog Off, Stennis Sci Ctr, Bay St Louis, MS 39522 USA. RP Stern, RJ (reprint author), Univ Texas, Dept Geosci, Box 830688, Richardson, TX 75083 USA. NR 51 TC 26 Z9 28 U1 0 U2 5 PU BLACKWELL SCIENCE PI CARLTON PA 54 UNIVERSITY ST, P O BOX 378, CARLTON, VICTORIA 3053, AUSTRALIA SN 1038-4871 J9 ISL ARC JI Isl. Arc. PD SEP PY 1998 VL 7 IS 3 BP 525 EP 540 DI 10.1111/j.1440-1738.1998.00208.x PG 16 WC Geosciences, Multidisciplinary SC Geology GA 122ED UT WOS:000076058200019 ER PT J AU Blank, DA AF Blank, DA TI Universal power optimized work for reciprocating internally reversible Stirling-like heat engine cycles with regeneration and linear external heat transfer SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID MAXIMUM POWER; EFFICIENCY AB When bounded by two infinite thermal reservoirs, the theory of irreversible thermodynamics for reciprocating externally irreversible cycles yields to an optimum efficiency at maximum power output of eta=1-(T-L/T-H)(0.5) for internally reversible Stirling-like cycles using regeneration and linear heat transfer modes is in contrast to the upper limit for Stirling cycles of eta=1-(T-L/T-H) obtained from classical thermodynamics. This optimum behavior is, however, only based on cycle temperature bounds. For reciprocating cycles one must go a step further and minimize cycle time. While executing this new step for finite thermal reservoirs, it was discovered that, for the general family of reciprocating Stirling-like cycles, the finite-time optimum work output (W-opt) at maximum power is less than (and in the limit of ideal regeneration, infinite reservoirs and of no internal irreversibility, is equal to) exactly one-half of the work of the externally reversible cycle operating at maximum thermal efficiency (Carnot work, W-rev) between the same temperature limits (i.e., W-opt less than or equal to 1/2W(rev)). To accomplish this the analysis goes beyond earlier works to use time symmetry to better optimize overall cycle power. Because this procedure results in the concurrent employment of the first and second laws of thermodynamics, it ensures optimal allocation of thermal conductances at the hot and cold ends while simultaneously achieving both minimization of internal entropy generation and maximization of specific cycle work for a given set of operating temperatures. Based on linear heat transfer laws, this expression for optimum work is shown to be independent of heat conductances. Finally, the analysis establishes that the maximum power attainable for a Stirling-like reciprocating cycle operating between two temperature bounds is always less than (and in the limit of power optimized Carnot conditions, equal to) one-half of that obtained for the continuous counterpart of the same cycle operating between the same temperature bounds. (C) 1998 American Institute of Physics. [S0021-8979(98)07713-5]. C1 USN Acad, Annapolis, MD 21402 USA. RP Blank, DA (reprint author), Indian Inst Technol, Dept Mech Engn, Kharagpur 721302, W Bengal, India. NR 17 TC 13 Z9 13 U1 1 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD SEP 1 PY 1998 VL 84 IS 5 BP 2385 EP 2392 DI 10.1063/1.368364 PG 8 WC Physics, Applied SC Physics GA 114CC UT WOS:000075590700003 ER PT J AU Culbertson, JC Newman, HS Wilker, C AF Culbertson, JC Newman, HS Wilker, C TI Optical probe of microwave current distributions in high temperature superconducting transmission lines SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID CURRENT-DENSITY; CRITICAL-STATE; FILMS; MICROSCOPY; MICROSTRIP; DEPOSITION; RESOLUTION; IMPEDANCE; YBA2CU3O7 AB This work develops two techniques for optically probing the spatial profile of microwave frequency superconducting currents. As an application, we measured the effects of high microwave powers on the spatial distribution of current on coplanar superconducting transmission lines fabricated using YBa2Cu3O7-delta and Tl2Ba2CaCu2O8. For both techniques, a focused light-spot served as the spatial probe whose effect was measured through the change in transmitted microwave power. For resonant geometries, the change was due to the kinetic-inductance bolometric effect; for nonresonant geometries, the change was due to the resistive-transition bolometric effect. Kinetic-inductance photoresponse measurements were acquired by setting the microwave frequency on the shoulder of a resonance and measuring the change in the microwave power transmitted through the device that occurred when the absorption of light shifted the frequency of the resonance. These kinetic-inductance measurements were performed as a function of microwave power on a YBa2Cu3O7-delta coplanar device at 74 K and on a Tl2Ba2CaCu2O8 coplanar device at 80 K. Because the photoresponse in this technique is proportional to the square of the local current density underneath the light spot (as opposed to directly proportional), this technique is sensitive to current redistribution on length scales much smaller than the similar to 6 mu m spatial resolution of our measurements. Extrinsic (defect and grain boundary associated) and intrinsic photoresponses were measured. Both coplanar samples showed no change in the intrinsic spatial distribution of the current as the microwave power was varied. At all temperatures the Tl2Ba2CaCu2O8 sample exhibited substantial extrinsic spatial variations on a distance scale equal to the Rim's similar to 5 mu m grain size; these spatial variations became more dramatic as the temperature T approached the critical temperature T-c. The spatial variations for the finer-grained YBa2Cu3O7 sample were much less pronounced. Behavior consistent with T-c being several degrees lower at the film edges was observed as T approached T-c; the edge-current photoresponse started to narrow, increase faster than linearly with light power, and move away from the film edges toward the center of the strip. lowering the light power lessened these effects. Resistive-bolometric photoresponse measurements performed at temperatures within the resistive transition exhibited the same light power effects near T-c. The kinetic-inductance photoresponse can also be used as a probe of the local quality of unpatterned superconducting films; for this usage an unpatterned film serves as one wall of a resonant cavity and a focused light beam is scanned through the transparent substrate onto the underside of the superconducting film while monitoring the shift in the cavity resonance. (C) 1998 American Institute of Physics. [S0021-8979(98)03815-8] C1 USN, Res Lab, Washington, DC 20375 USA. Dupont Superconduct, Expt Stn, Wilmington, DE 19880 USA. RP USN, Res Lab, Washington, DC 20375 USA. EM james.culbertson@nrl.navy.mil NR 27 TC 19 Z9 19 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD SEP 1 PY 1998 VL 84 IS 5 BP 2768 EP 2787 DI 10.1063/1.368390 PG 20 WC Physics, Applied SC Physics GA 114CC UT WOS:000075590700056 ER PT J AU Kayar, SR Parker, EC Aukhert, EO AF Kayar, SR Parker, EC Aukhert, EO TI Relationship between T-wave amplitude and oxygen pulse in guinea pigs in hyperbaric helium and hydrogen SO JOURNAL OF APPLIED PHYSIOLOGY LA English DT Article DE diving; gas density; electrocardiogram; heart rate; high pressure neurological syndrome; metabolic rate; telemetry ID HEART-RATE; PRESSURE; FREQUENCY; HUMANS; DIVE AB Diving is known to induce a change in the amplitude of the T wave (A(Tw)) of electrocardiograms, but it is unknown whether this is linked to a change in cardiovascular performance. We analyzed A(Tw) in guinea pigs at 10-60 atm and 25-36 degrees C, breathing 2% O-2 in either helium (heliox; n = 10) or hydrogen (hydrox; n = 9) for Ih at each pressure. Core temperature and electrocardiograms were detected by using implanted radiotelemeters. O-2 consumption rate was measured by using gas chromatography. In a previous study (S. R. Kayar and E. C. Parker. J. Appl. Physiol. 82: 988-997, 1997), we analyzed the O-2 pulse, i.e., the O-2 consumption rate per heart beat, in the same animals. By multivariate regression analysis, we identified variables that were significant to O-2 pulse: body surface area, chamber temperature, core temperature, and pressure. In this study, inclusion of A(Tw) made a significantly better model with fewer variables. After normalizing for chamber temperature and pressure, the O-2 pulse increased with increasing A(Tw) in heliox (P = 0.001) but with decreasing A(Tw) in hydrox (P < 0.001). Thus A(Tw) is associated with the differences in O-2 pulse for animals breathing heliox vs. hydrox. C1 USN, Med Res Inst, Albert R Behnke Diving Med Res Ctr, Bethesda, MD 20889 USA. RP Kayar, SR (reprint author), USN, Med Res Inst, Albert R Behnke Diving Med Res Ctr, Code 0512,8901 Wisconsin Ave, Bethesda, MD 20889 USA. NR 34 TC 3 Z9 4 U1 0 U2 0 PU AMER PHYSIOLOGICAL SOC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA SN 8750-7587 J9 J APPL PHYSIOL JI J. Appl. Physiol. PD SEP PY 1998 VL 85 IS 3 BP 798 EP 806 PG 9 WC Physiology; Sport Sciences SC Physiology; Sport Sciences GA 117KY UT WOS:000075781500004 PM 9729550 ER PT J AU Gilardi, RD Butcher, RJ AF Gilardi, RD Butcher, RJ TI A new class of flexible energetic salts, part 5: The structures of two hexammonium polymorphs and the ethane-1,2-diammonium salts of dinitramide SO JOURNAL OF CHEMICAL CRYSTALLOGRAPHY LA English DT Article DE hexamine structures; hexammonium structures; ethane-1,2-diammonium structures; dinitramide structures ID THERMOCHEMISTRY AB The crystal structures of two hexammonium polymorphs, 1 and 2, and the ethane-1,2-diammonium, 3, salts of dinitramide have been determined. 1 crystallizes in the triclinic space group
with cell dimensions a = 6.391(2), b = 7.5826(9), c = 10.828(1) Angstrom, a = 77.58(1), beta = 88.18 (2), gamma = 87.54(2)degrees, 2 crystallizes in the monoclinic space group P2(1)/c with cell dimensions a = 6.4893(3), b = 14.5149(8), c = 10.6557(4) Angstrom, beta = 94.300(4)degrees and 3 crystallizes in the triclinic space group
with cell dimensions a = 5.614(1), b = 6.867(2), c = 7.371(2) Angstrom, alpha = 68.89(2), beta = 89.00(2), gamma = 78.90(2)degrees. The three structures all contain protonated amine cations which are involved in hydrogen bonding interactions with dinitramide anions.
C1 USN, Struct Matter Lab, Res Lab, Washington, DC 20375 USA.
Howard Univ, Dept Chem, Washington, DC 20059 USA.
RP Gilardi, RD (reprint author), USN, Struct Matter Lab, Res Lab, Washington, DC 20375 USA.
RI G, Neela/H-3016-2014
NR 13
TC 13
Z9 13
U1 0
U2 0
PU KLUWER ACADEMIC/PLENUM PUBL
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1074-1542
J9 J CHEM CRYSTALLOGR
JI J. Chem. Crystallogr.
PD SEP
PY 1998
VL 28
IS 9
BP 673
EP 681
DI 10.1023/A:1021743916604
PG 9
WC Crystallography; Spectroscopy
SC Crystallography; Spectroscopy
GA 171LX
UT WOS:000078866200002
ER
PT J
AU Orlin, PA
Perkins, AL
AF Orlin, PA
Perkins, AL
TI A frequency accurate finite difference scheme for burgers equation
SO JOURNAL OF COMPUTATIONAL ACOUSTICS
LA English
DT Article
AB A method is presented for designing a one-step, explicit finite difference scheme for solving the inviscid Burgers equation based on an a priori specification of dissipation and phase accuracy requirements. Frequency accurate temporal and spatial approximations with undetermined coefficients are used, together with a set of constraints that ensure that the approximations converge as the spatial and temporal grid sizes approach zero and satisfy the Lax Equivalence Theorem. A practical design of the difference scheme using a heuristic zero placement method, combined with a stability requirement, results in a linear matrix problem which is solved to obtain the undetermined coefficients. The partial differential equation itself provides the relationship between the temporal and spatial frequency dependence in the numerical approximation.
C1 Univ So Mississippi, Ctr Higher Learning, Stennis Space Ctr, MS 39529 USA.
USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Orlin, PA (reprint author), Univ So Mississippi, Ctr Higher Learning, Stennis Space Ctr, MS 39529 USA.
NR 13
TC 2
Z9 2
U1 0
U2 0
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 912805, SINGAPORE
SN 0218-396X
J9 J COMPUT ACOUST
JI J. Comput. Acoust.
PD SEP
PY 1998
VL 6
IS 3
BP 321
EP 335
DI 10.1142/S0218396X98000223
PG 15
WC Acoustics; Mathematics, Interdisciplinary Applications
SC Acoustics; Mathematics
GA 157WM
UT WOS:000078084700003
ER
PT J
AU Johnson, HM
Singh, A
Young, RHF
AF Johnson, HM
Singh, A
Young, RHF
TI Fall protection analysis for workers on residential roofs
SO JOURNAL OF CONSTRUCTION ENGINEERING AND MANAGEMENT-ASCE
LA English
DT Article
AB Safety during residential roof construction and repair activities is of significant concern since many injuries occur, especially as a result of falls. The Hawaii Occupational Safety and Health Division of the Hawaii Department of Labor commissioned a research project to investigate this matter. This study involves an evaluation of existing regulations, construction practices, and alternate fall protection measures. It is found that the current state of compliance is poor; fall protection plans are not prepared as required, and positive safety measures such as guardrails and personal fall arrest systems are not used. The reasons for this are many, including the extreme competitiveness of the home building and roofing industries, unsafe worker behavior, design difficulties, conventional construction practices, and a lack of knowledge. Fall protection regulations are misunderstood, and the fall protection plan is particularly prone to poor implementation. For fall protection systems to be implemented voluntarily, they must be feasible, simple, economical, protective, and flexible. Several systems were analyzed for their ability to meet these criteria. The most promising systems included prefabrication of the roof system and personal fall arrest systems use. This paper presents the findings of the study and recommendations for optimal enforcement with an aim at reducing fall injuries.
C1 USN, Civ Engn Corps, Aiea, HI 96701 USA.
RP Johnson, HM (reprint author), USN, Civ Engn Corps, 98-673 Kaahele St, Aiea, HI 96701 USA.
NR 12
TC 15
Z9 16
U1 1
U2 1
PU ASCE-AMER SOC CIVIL ENGINEERS
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2398 USA
SN 0733-9364
J9 J CONSTR ENG M ASCE
JI J. Constr. Eng. Manage.-ASCE
PD SEP-OCT
PY 1998
VL 124
IS 5
BP 418
EP 428
DI 10.1061/(ASCE)0733-9364(1998)124:5(418)
PG 11
WC Construction & Building Technology; Engineering, Industrial;
Engineering, Civil
SC Construction & Building Technology; Engineering
GA 121XL
UT WOS:000076041100010
ER
PT J
AU Pieper, RJ
Kraus, AD
AF Pieper, RJ
Kraus, AD
TI Performance analysis of double stack cold plates covering all conditions
of asymmetric heat loading
SO JOURNAL OF ELECTRONIC PACKAGING
LA English
DT Article
AB Double stack, force-cooled cold plates, which are used as electronic chassis, are investigated for all conditions of unequal temperature and heat loading. A closed form solution that relates the plate temperatures to composite heat loads is derived. This analysis covers all regimes of operation. In particular, this includes the previously ignored regime in which no adiabatic point exists anywhere on either of the fins connecting cover and splitter plates, The heat dissipating advantage of the double stack structure, over a similarly designed single stack structure, is predicted with the analysis presented in the paper.
C1 USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
RP Pieper, RJ (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
NR 18
TC 0
Z9 0
U1 0
U2 2
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1043-7398
J9 J ELECTRON PACKAGING
JI J. Electron. Packag.
PD SEP
PY 1998
VL 120
IS 3
BP 296
EP 301
DI 10.1115/1.2792636
PG 6
WC Engineering, Electrical & Electronic; Engineering, Mechanical
SC Engineering
GA 125QE
UT WOS:000076247900012
ER
PT J
AU Watson, KP
Granger, RA
AF Watson, KP
Granger, RA
TI Hydrodynamic effect of a satellite transmitter on a juvenile green
turtle (Chelonia mydas)
SO JOURNAL OF EXPERIMENTAL BIOLOGY
LA English
DT Article
DE green turtle; Chelonia mydas; hydrodynamics; lift; drag; pitch;
transmitter; telemetry; energy; swimming
ID SEA TURTLE; TELEMETRY; PENGUINS; TRACKING
AB Wind tunnel tests were performed to measure the effect of a satellite transmitter on a juvenile green turtle (Chelonia mydas), A full-scale turtle model was constructed from an 11.5 kg specimen with a 48 cm carapace length, and a transmitter model was constructed from a Telonics ST-6. The turtle model was tested in a wind tunnel with and without the transmitter, which was mounted on the forward, topmost part of the carapace, Drag,,lift and pitch moment were measured for several speeds and flow angles, and the data were scaled for application to the marine environment. At small flow angles representative of straight-line swimming, the transmitter increased drag by 27-30 %, reduced lift by less than 10 % and increased the pitch moment by 11-42 %, On the basis of the drag data at zero angle of attack, it is estimated that the backpack will reduce swimming speed by 11 %, assuming that the turtle produces the same thrust with the unit attached. The drag data are also used to estimate the effect of a transmitter on the swimming energetics of an adult green turtle. Design guidelines are included to minimize the adverse forces and moments caused by the transmitter.
C1 USN, Ctr Surface Warfare, Coastal Syst Stn, Panama City, FL 32407 USA.
USN Acad, Dept Mech Engn, Annapolis, MD 21402 USA.
RP Watson, KP (reprint author), USN, Ctr Surface Warfare, Coastal Syst Stn, Code R11, Panama City, FL 32407 USA.
NR 22
TC 48
Z9 54
U1 0
U2 10
PU COMPANY OF BIOLOGISTS LTD
PI CAMBRIDGE
PA BIDDER BUILDING CAMBRIDGE COMMERCIAL PARK COWLEY RD, CAMBRIDGE, CAMBS,
ENGLAND CB4 4DL
SN 0022-0949
J9 J EXP BIOL
JI J. Exp. Biol.
PD SEP
PY 1998
VL 201
IS 17
BP 2497
EP 2505
PG 9
WC Biology
SC Life Sciences & Biomedicine - Other Topics
GA 121KT
UT WOS:000076013500005
ER
PT J
AU Jayakody, C
Nelson, GL
Sorathia, U
Lewandowski, S
AF Jayakody, C
Nelson, GL
Sorathia, U
Lewandowski, S
TI A cone calorimetric study of flame retardant elastomeric polyurethanes
modified with siloxanes and commercial flame retardant additives
SO JOURNAL OF FIRE SCIENCES
LA English
DT Article
DE polyurethane elastomers; diphenylmethane-4,4 '-diisocyanate (MDI);
Baytec (R) prepolymers; polydimethylsiloxanes; powdered siloxane
additives; commercial flame retardant additives; flame retardancy; Cone
Calorimeter; time to sustained ignition (TTI); peak heat release rate
(PHRR); average heat release rate (Ave. HRR); total heat release (THR);
average specific extinction area (Ave. SEA)
ID URETHANE BLOCK-COPOLYMERS
AB Polyurethanes are the single most versatile family of polymers with a wide range of applications. There is a substantial need for the development of polyurethane materials with low heat release rate and low smoke release rate. In this study, an extensive series of elastomeric polyurethanes based on diphenylmethane-4,4 '-diisocyanate (MDI) prepolymers were prepared and further modified with fluid and powered siloxanes and conventional flame retardant additives. The flame retardant behavior of these polymers was studied using the Cone Calorimeter (ASTM: E-1354), the instrument that has emerged as an important tool for the analytical testing of materials for their fire properties.** All powdered siloxane additives used in this study, even at 5% loading level, gave a 70-80% reduction in peak heat release rates compared to standard materials. The reductions of peak HRR of fluid siloxane-modified materials compared to the base material were in the range of 49-78%. The conventional flame retardant additives used in this study also reduced peak heat release rate dramatically. The synergistic effect of conventional flame retardant additives with siloxane powders is discussed.
C1 Florida Inst Technol, Dept Chem, Melbourne, FL 32901 USA.
USN, Ctr Surface Warfare, Carderock Div, Bethesda, MD 20817 USA.
Bayer Corp, Div Polymers, Pittsburgh, PA 15205 USA.
RP Nelson, GL (reprint author), Florida Inst Technol, Dept Chem, Melbourne, FL 32901 USA.
NR 10
TC 14
Z9 15
U1 1
U2 6
PU TECHNOMIC PUBL CO INC
PI LANCASTER
PA 851 NEW HOLLAND AVE, BOX 3535, LANCASTER, PA 17604 USA
SN 0734-9041
J9 J FIRE SCI
JI J. Fire Sci.
PD SEP-OCT
PY 1998
VL 16
IS 5
BP 351
EP 382
DI 10.1177/073490419801600504
PG 32
WC Engineering, Multidisciplinary; Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA 168NG
UT WOS:000078698700004
ER
PT J
AU Kim, KH
AF Kim, KH
TI A design method for high-speed propulsor blades
SO JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME
LA English
DT Article
C1 USN, Ctr Surface Warfare, Carderock Div, Bethesda, MD 20817 USA.
RP Kim, KH (reprint author), USN, Ctr Surface Warfare, Carderock Div, 9500 MacArthur Blvd W, Bethesda, MD 20817 USA.
NR 3
TC 0
Z9 0
U1 0
U2 1
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0098-2202
J9 J FLUID ENG-T ASME
JI J. Fluids Eng.-Trans. ASME
PD SEP
PY 1998
VL 120
IS 3
BP 431
EP 431
DI 10.1115/1.2820674
PG 1
WC Engineering, Mechanical
SC Engineering
GA 125RY
UT WOS:000076251900002
ER
PT J
AU Obenschain, SP
AF Obenschain, SP
TI The KrF direct drive fusion concept
SO JOURNAL OF FUSION ENERGY
LA English
DT Article; Proceedings Paper
CT Fusion Power Associates Annual Meeting and Symposium on Cost-Effective
Steps to Fusion Power
CY JAN 25-27, 1999
CL MARINA DEL REY, CALIFORNIA
DE laser fusion; krypton fluoride lasers
AB In collaboration with other laboratories, we are beginning a program to study and demonstrate the scientific, technical and economic feasibility of power production using laser fusion. The program, based on the development of a high average power Krypton Fluoride laser, is described in this paper.
C1 USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Obenschain, SP (reprint author), USN, Res Lab, Div Plasma Phys, Code 6731,4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU KLUWER ACADEMIC/PLENUM PUBL
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0164-0313
J9 J FUSION ENERG
JI J. Fusion Energy
PD SEP
PY 1998
VL 17
IS 3
BP 219
EP 220
DI 10.1023/A:1021854128204
PG 2
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 359EX
UT WOS:000089599500009
ER
PT J
AU Dahlburg, JP
Gardner, JH
Schmitt, AJ
Obenschain, SP
AF Dahlburg, JP
Gardner, JH
Schmitt, AJ
Obenschain, SP
TI Critical science issues for direct drive inertial fusion energy
SO JOURNAL OF FUSION ENERGY
LA English
DT Article; Proceedings Paper
CT Fusion Power Associates Annual Meeting and Symposium on Cost-Effective
Steps to Fusion Power
CY JAN 25-27, 1999
CL MARINA DEL REY, CALIFORNIA
DE inertial fusion; krypton fluoride lasers
AB There are several topics that require resolution prior to the construction of an Inertial Fusion Energy [IFE] laboratory Engineering Test Facility [ETF]: a pellet that produces high gain; a pellet fabrication system that cost-effectively and rapidly manufactures these pellets; a sufficiently uniform and durable high repetition-rate laser pellet driver; a practical target injection system that provides accurate pellet aiming; and, a target chamber that will survive the debris and radiation of repeated high-gain pellet implosions. In this summary we describe the science issues and opportunities that are involved in the design of a successful high gain direct drive Inertial Confinement Fusion [ICF] pellet.
C1 USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
USN, Res Lab, LCP & FD, Washington, DC 20375 USA.
RP Dahlburg, JP (reprint author), USN, Res Lab, Div Plasma Phys, Code 6730,4555 Overlook AU SW, Washington, DC 20375 USA.
NR 0
TC 0
Z9 0
U1 0
U2 2
PU KLUWER ACADEMIC/PLENUM PUBL
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0164-0313
J9 J FUSION ENERG
JI J. Fusion Energy
PD SEP
PY 1998
VL 17
IS 3
BP 227
EP 229
DI 10.1023/A:1021810413183
PG 3
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 359EX
UT WOS:000089599500012
ER
PT J
AU Sojka, JJ
Schunk, RW
Bowline, MD
Chen, J
Slinker, S
Fedder, J
Sultan, PJ
AF Sojka, JJ
Schunk, RW
Bowline, MD
Chen, J
Slinker, S
Fedder, J
Sultan, PJ
TI Ionospheric storm simulations driven by magnetospheric MHD and by
empirical models with data comparisons
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID INTERPLANETARY MAGNETIC-FIELD; WINTER F-REGION; EARTHS MAGNETOSPHERE;
CONVECTION RESPONSE; ELECTRIC-FIELDS; SOLAR MINIMUM; JANUARY 14;
TEMPERATURE; PASSAGE; PATTERN
AB The results of two ionospheric simulations are compared with each other and with ionospheric observations of the southern hemisphere for the magnetic cloud passage event of January 14, 1988, For most of the event one simulation agrees with observations, while the other does not. Electric fields and electron precipitation patterns generated by a magnetospheric MHD model are used as inputs to a physical model of the ionosphere in the successful simulation, while empirical electric fields and electron precipitation are used as the inputs for the second simulation. In spite of ionospheric summer conditions a large and deep polar hole is developed. This is seen in the in situ plasma observations made by the DMSP-F8 satellite. The hole is surprisingly present during both northward and southward IMF conditions. It is deepest for the storm phase of the southward IMF period. A well-defined tongue of ionization is formed during this period. These features have been reproduced by the TDIM-MHD simulation and to a lesser extent by the TDIM-empirical simulation. However, the model simulations have not been able to generate a storm enhanced density where one was observed by DMSP-F8 during the initial phase of the storm. The differences between the two F region ionospheric simulations are attributed to differences in the magnetospheric electric fields and precipitation patterns used as inputs. This study provides a unique first simulation of the ionosphere's response to self-consistent electric field and auroral precipitation patterns over a 24-hour period that leads into a major geomagnetic storm.
C1 Utah State Univ, Ctr Atmospher & Space Sci, Logan, UT 84322 USA.
USN, Div Plasma Phys, Res Lab, Washington, DC 20375 USA.
George Mason Univ, Inst Computat Sci & Informat, Fairfax, VA 22030 USA.
USAF, Res Lab, Space Effects Div, GPSM, Hanscom AFB, MA 01731 USA.
RP Sojka, JJ (reprint author), Utah State Univ, Ctr Atmospher & Space Sci, Logan, UT 84322 USA.
NR 30
TC 14
Z9 14
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD SEP 1
PY 1998
VL 103
IS A9
BP 20669
EP 20684
DI 10.1029/98JA01744
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 118BG
UT WOS:000075817300032
ER
PT J
AU Weiss, WR
Ishii, KJ
Hedstrom, RC
Sedegah, M
Ichino, M
Barnhart, K
Klinman, DM
Hoffman, SL
AF Weiss, WR
Ishii, KJ
Hedstrom, RC
Sedegah, M
Ichino, M
Barnhart, K
Klinman, DM
Hoffman, SL
TI A plasmid encoding murine granulocyte-macrophage colony-stimulating
factor increases protection conferred by a malaria DNA vaccine
SO JOURNAL OF IMMUNOLOGY
LA English
DT Article
ID CD8+ T-CELLS; PLASMODIUM-YOELII SPOROZOITES; MARROW-DERIVED CELLS;
INTERFERON-GAMMA; CIRCUMSPOROZOITE PROTEIN; CPG MOTIFS; INFECTED
HEPATOCYTES; BACTERIAL-DNA; EXPRESSION VECTOR; ANTIBODY-RESPONSE
AB Using the murine parasite Plasmodium yoelii (Py) as a model for malaria vaccine development, we have previously shown that a DNA plasmid encoding the Py circumsporozoite protein (PyCSP) can protect mice against sporozoite infection. We now report that mixing a new plasmid PyCSP1012 with a plasmid encoding murine granulocyte-macrophage colony-stimulating factor (GM-CSF) increases protection against malaria, and we have characterized in detail the increased immune responses due to GM-CSF, PyCSP1012 plasmid alone protected 28% of mice, and protection increased to 58% when GM-CSF was added (p < 0.0001). GM-CSF plasmid alone did not protect, and control plasmid expressing inactive GM-CSP did not enhance protection. GM-CSF plasmid increased Abs to PyCSP of IgG1, IgG2a, and IgG2b isotypes, but not IgG3 or IgM. IFN-gamma responses of CD8(+) T cells to the PyCSP 280-288 amino acid epitope increased but CTL activity did not change. The most dramatic changes after adding GM-CSF plasmid were increases in Ag-specific IL-2 production and CD4(+) T cell proliferation. We hypothesize that GM-CSF may act on dendritic cells to enhance presentation of the PyCSP Ag, with enhanced IL-2 production and CD4(+) T cell activation driving the increases in Abs and CD8(+) T cell function. Recombinant GM-CSP is already used in humans for medical purposes, and GM-CSF protein or plasmids may be useful as enhancers of DNA vaccines.
C1 USN, Med Res Inst, Malaria Program, Rockville, MD 20852 USA.
US FDA, Ctr Biol Evaluat & Res, Div Viral Prod, Sect Retroviral Immunol, Bethesda, MD 20892 USA.
Univ Maryland, Baltimore, MD 21201 USA.
Vical Inc, San Diego, CA 92121 USA.
RP Weiss, WR (reprint author), USN, Med Res Inst, Malaria Program, 12300 Washington Ave, Rockville, MD 20852 USA.
RI Ishii, Ken/B-1685-2012
OI Ishii, Ken/0000-0002-6728-3872
NR 49
TC 130
Z9 143
U1 1
U2 5
PU AMER ASSOC IMMUNOLOGISTS
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA
SN 0022-1767
J9 J IMMUNOL
JI J. Immunol.
PD SEP 1
PY 1998
VL 161
IS 5
BP 2325
EP 2332
PG 8
WC Immunology
SC Immunology
GA 112UB
UT WOS:000075511600032
PM 9725227
ER
PT J
AU Brandt, JE
Medin, JA
Rosler, ES
Nelson, MC
Chute, JP
Hoffman, R
AF Brandt, JE
Medin, JA
Rosler, ES
Nelson, MC
Chute, JP
Hoffman, R
TI Retroviral gene marking of human and non-human primate bone marrow
progenitor and stem cells.
SO JOURNAL OF INVESTIGATIVE MEDICINE
LA English
DT Meeting Abstract
C1 Univ Illinois, Dept Med, Chicago, IL USA.
USN, Med Res Inst, Bethesda, MD USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE RD, THOROFARE, NJ 08086 USA
SN 1081-5589
J9 J INVEST MED
JI J. Invest. Med.
PD SEP
PY 1998
VL 46
IS 7
SU S
BP 254A
EP 254A
PG 1
WC Medicine, General & Internal; Medicine, Research & Experimental
SC General & Internal Medicine; Research & Experimental Medicine
GA 113YX
UT WOS:000075582600043
ER
PT J
AU Patrick, HJ
Kersey, AD
Bucholtz, F
AF Patrick, HJ
Kersey, AD
Bucholtz, F
TI Analysis of the response of long period fiber gratings to external index
of refraction
SO JOURNAL OF LIGHTWAVE TECHNOLOGY
LA English
DT Article
DE chemical sensing; fiber gratings; index of refraction
ID SENSORS; FILTERS
AB This paper demonstrates that the change in wavelength of a long period fiber grating attenuation band with changes in external index of refraction can be enhanced by proper selection of the grating period. We calculate and experimentally verify that the wavelength shift caused by changing the external index from n = 1 to n = 1.44 of the attenuation band which appears in the 1400-1600 nm region in a 200-mu m period grating is four times that in a 350-mu m period grating, Changes in the spectrum over a wavelength range from 1100 to 1600 nm and 1 < n < 1.72 index range are also presented, and implications for grating design when enhanced or reduced index sensitivity is desired are discussed. Finally, we demonstrate the use of a highly index-sensitive long period fiber grating as a chemical concentration sensor.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Patrick, HJ (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 19
TC 492
Z9 514
U1 3
U2 35
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA
SN 0733-8724
J9 J LIGHTWAVE TECHNOL
JI J. Lightwave Technol.
PD SEP
PY 1998
VL 16
IS 9
BP 1606
EP 1612
DI 10.1109/50.712243
PG 7
WC Engineering, Electrical & Electronic; Optics; Telecommunications
SC Engineering; Optics; Telecommunications
GA 117GG
UT WOS:000075772700009
ER
PT J
AU Singh, A
Johnson, HM
AF Singh, A
Johnson, HM
TI Conflict management diagnosis at project management organizations
SO JOURNAL OF MANAGEMENT IN ENGINEERING
LA English
DT Article
AB The world is full of conflict. Conflict is a matter of life, occurring as frequently as conversation in some cultures. The organization, like any culture, is subject to conflict. The project management organization is even more apt to suffer from conflict, with its constantly changing environment. However, the effects of conflict on the organization are not always negative. How is the individual project manager to know when his or her organization is in a healthy state of conflict? This paper presents one method that engineering managers can use to diagnose conflict in their organizations. The method has been applied to diagnose conflict within the State Public Agency (SPA), engaged in design and construction of civil engineering projects. The results indicate that SPA engineers predominantly use a problem-solving style to find mutual win-win resolutions to conflict, showing that SPA can thrive under conditions of conflict. The results also indicate, however, that SPA may be suffering from a lack of conflict. The average intensity of conflict perceived by all engineers is 1.40 on a scale of 0-4, or only a slight impact. Likewise, the frequency with which conflict occurs is low, at 1.59 on the same scale. Recommendations are provided for SPA.
C1 Univ Hawaii, Dept Civil Engn, Honolulu, HI 96822 USA.
USN, Aiea, HI 96701 USA.
RP Singh, A (reprint author), Univ Hawaii, Dept Civil Engn, 2540 Dole St, Honolulu, HI 96822 USA.
NR 13
TC 3
Z9 3
U1 1
U2 5
PU ASCE-AMER SOC CIVIL ENGINEERS
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2398 USA
SN 0742-597X
J9 J MANAGE ENG
JI J. Manage. Eng.
PD SEP-OCT
PY 1998
VL 14
IS 5
BP 48
EP 63
DI 10.1061/(ASCE)0742-597X(1998)14:5(48)
PG 16
WC Engineering, Industrial; Engineering, Civil
SC Engineering
GA 110RB
UT WOS:000075393200036
ER
PT J
AU Root, WL
Serakos, D
AF Root, WL
Serakos, D
TI The state of dynamical input-output systems as an operator
SO JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
LA English
DT Article
AB A causal input-output system operating for all time from the indefinite past to the indefinite future may be described by a function space for inputs, a function space for outputs, and a causal operator mapping the input space into the output space. The state of such a system at any instant is defined here as an operator from the space of possible future inputs to that of future outputs. This operator is called the natural state. The output space is taken to be a time-shift-invariant normed linear function space, and the input space is either also such a space or a time-shift-invariant subset thereof. There is flexibility allowed in the choice of these spaces. Both the input-output operator and the operator giving the natural state are themselves taken to be elements of normed linear spaces with one of a particular family of norms called N-power norms. The general development applies to nonlinear and time-varying systems. Continuity and boundedness of the natural state (as an operator) and properties of the natural state and its trajectory as related to the input-output description of the system are investigated. Two examples are presented. (C) 1998 Academic Press.
C1 Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA.
USN, Ctr Surface Warfare, Combat Syst Dept, Dahlgren, VA 22448 USA.
RP Serakos, D (reprint author), Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU ACADEMIC PRESS INC
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0022-247X
J9 J MATH ANAL APPL
JI J. Math. Anal. Appl.
PD SEP 1
PY 1998
VL 225
IS 1
BP 224
EP 248
DI 10.1006/jmaa.1998.6017
PG 25
WC Mathematics, Applied; Mathematics
SC Mathematics
GA 115YP
UT WOS:000075694200012
ER
PT J
AU Leffler, CT
Dembert, ML
AF Leffler, CT
Dembert, ML
TI Posttraumatic stress symptoms among US Navy divers recovering TWA Flight
800
SO JOURNAL OF NERVOUS AND MENTAL DISEASE
LA English
DT Article
ID DISASTER; BODIES; DEATH
C1 USN, Med Ctr, Dept Psychiat, Portsmouth, VA 23708 USA.
Dept Med, Mobile Diving & Salvage Unit 2, Norfolk, VA USA.
RP Dembert, ML (reprint author), USN, Med Ctr, Dept Psychiat, Portsmouth, VA 23708 USA.
NR 13
TC 27
Z9 27
U1 3
U2 3
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 USA
SN 0022-3018
J9 J NERV MENT DIS
JI J. Nerv. Ment. Dis.
PD SEP
PY 1998
VL 186
IS 9
BP 574
EP 577
DI 10.1097/00005053-199809000-00009
PG 4
WC Clinical Neurology; Psychiatry
SC Neurosciences & Neurology; Psychiatry
GA 116XW
UT WOS:000075751200009
PM 9741564
ER
PT J
AU Lin, S
Gensburg, L
Marshall, EG
Roth, GB
Dlugosz, L
AF Lin, S
Gensburg, L
Marshall, EG
Roth, GB
Dlugosz, L
TI Effects of maternal work activity during pregnancy on infant
malformations
SO JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL MEDICINE
LA English
DT Article
ID LOW-BIRTH-WEIGHT; CONGENITAL-DEFECTS; WOMEN
AB This article examines the association between two birth defects, neural tube defects and oral cleft defects, and maternal physical work demands during the per periconceptional period. A case-control st study was conducted by comparing exposure characteristics of mothers of malformed infants, as ascertained from the New York State Congenital Malformations Registry (n = 520), with mothers of non-malformed infants (n = 1154). Case groups were further subdivided on whether infants had additional defects. Occupational exposure information was collected from a self-administered questionnaire, and demographic variables from vital records, The results showed no general differences between cases and controls in most variables. However, those infants with cleft defects plus additional defects tended to have a marginally increased risk (odds ratio = 1.76; 95 % confidence interval, 1.02-3.21) in relation to maternal jobs requiring standing (greater than or equal to 75 % of time). We suggest that exposure assessment be improved and defects subdivided for future studies.
C1 Bur Environm & Occupat Epidemiol, New York State Dept Hlth, Albany, NY 12203 USA.
Bur Occupat Hlth, New York State Dept Hlth, Albany, NY 12203 USA.
USN, Geocenters Inc, Hlth Res Ctr, San Diego, CA USA.
RP Lin, S (reprint author), Bur Environm & Occupat Epidemiol, New York State Dept Hlth, 1215 Western Ave,Room 105, Albany, NY 12203 USA.
OI Lin, Shao/0000-0002-5535-7504
NR 25
TC 9
Z9 10
U1 1
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 USA
SN 1076-2752
J9 J OCCUP ENVIRON MED
JI J. Occup. Environ. Med.
PD SEP
PY 1998
VL 40
IS 9
BP 829
EP 834
DI 10.1097/00043764-199809000-00013
PG 6
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 121MG
UT WOS:000076017100012
PM 9777568
ER
PT J
AU Harff, B
Gurr, TR
AF Harff, B
Gurr, TR
TI Systematic early warning of humanitarian emergencies
SO JOURNAL OF PEACE RESEARCH
LA English
DT Article; Proceedings Paper
CT Conference on the Political Economy of Humanitarian Emergencies
CY OCT 06-08, 1996
CL HELSINKI, FINLAND
SP World Inst Dev Econ Res
ID CONFLICT; DEMOCRACY; PEOPLES
AB More than 60 communal minorities were victimized as a result of internal wars and stare failures between 1980 and 1996. Two theoretical models provide the basis for systematic early warning of future victimization of communal and political groups. The potential for communal rebellion is said to be a joint function of group incentives, group capacity, and opportunities for collective action. Indicators of these concepts from the Minorities at Risk project are used to identify 73 groups at high risk of communal rebellion in the late 1990s. Genocide and politicide are attributed to background conditions (e.g. political upheaval), intervening conditions (e.g. elite fragmentation), and a short-term increase in theoretically pre-specified accelerators. Monitoring of accelerators and de-accelerators in potential crisis situations provides a link between risk assessments based on structural models and early warnings of use to national and international policy-makers. The approach is illustrated by an analysis of accelerators prior to the occurrence of the 1994 genocide in Rwanda.
C1 USN Acad, Annapolis, MD 21402 USA.
Univ Maryland, College Pk, MD 20742 USA.
RP Harff, B (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 44
TC 28
Z9 28
U1 12
U2 35
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 6 BONHILL STREET, LONDON, ENGLAND EC2A 4PU
SN 0022-3433
J9 J PEACE RES
JI J. Peace Res.
PD SEP
PY 1998
VL 35
IS 5
BP 551
EP 579
DI 10.1177/0022343398035005002
PG 29
WC International Relations; Political Science
SC International Relations; Government & Law
GA 129DX
UT WOS:000076449000002
ER
PT J
AU Meyer, GA
Blum, NJ
Hitchcock, W
Fortina, P
AF Meyer, GA
Blum, NJ
Hitchcock, W
Fortina, P
TI Absence of the fragile X CGG trinucleotide repeat expansion in girls
diagnosed with a pervasive developmental disorder
SO JOURNAL OF PEDIATRICS
LA English
DT Article
ID INFANTILE-AUTISM; MENTAL-RETARDATION; SWEDISH MULTICENTER; CHILDREN;
PREVALENCE; POPULATION; ASSOCIATION; INDIVIDUALS; CHROMOSOME; FREQUENCY
AB The purpose of this study was to determine the prevalence of the fragile X (FRAX) CGG trinucleotide expansion in a population of young girls (n = 45) diagnosed with pervasive developmental disorder (PDD). Their mean age was 43.7 months (range, 25 to 132 months). Diagnoses included autistic disorder (n = 20), PDD (n = 23), and Asperger's syndrome (n = 2). Molecular FRAX testing was performed on all patients by using the Southern gene blot technique. Genomic DNA was digested with both EcoRI and EagI, fractionated on agarose gel, and blotted and probed with the radiolabeled StB12.3 FMR-1 probe. None Of the subjects were found to have an expansion of CGG in either the 2.8 kb or 5.2 kb fragments. A 95% CI, for the prevalence of the FRAX mutation in female subjects with PDD, has an upper bound of 2.9%. We conclude that the prevalence of FRAX positivity in girls with PDD is lower than previously reported. This raises the question of whether any association between FRAX and PDD in female subjects is specific to PDD or is related rather to the presence of mental retardation.
C1 USN, Med Ctr Portsmouth, Dept Pediat, Portsmouth, VA 23708 USA.
Childrens Seashore house, Div Child Dev & Rehabil, Philadelphia, PA USA.
Childrens Hosp Philadelphia, Dept Pathol & Clin Labs, Philadelphia, PA 19104 USA.
Univ Penn, Sch Med, Dept Pediat, Philadelphia, PA 19104 USA.
RP Meyer, GA (reprint author), USN, Med Ctr Portsmouth, Dept Pediat, 620 John Paul Jones Circle, Portsmouth, VA 23708 USA.
NR 36
TC 4
Z9 4
U1 1
U2 1
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 SEP
PY 1998
VL 133
IS 3
BP 363
EP 365
DI 10.1016/S0022-3476(98)70270-7
PG 3
WC Pediatrics
SC Pediatrics
GA 117GJ
UT WOS:000075772900013
PM 9738717
ER
PT J
AU Eichmiller, FC
Hoffman, KM
Guiseppetti, AA
Wray, MM
Avers, RJ
AF Eichmiller, FC
Hoffman, KM
Guiseppetti, AA
Wray, MM
Avers, RJ
TI Acid-assisted consolidation of silver alloys for direct fillings
SO JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND
TECHNOLOGY
LA English
DT Article
DE acid-assisted consolidation; cold-welding; consolidated silver
ID MERCURY
AB Silver-rich metal powders cold-welded by consolidation have been investigated as possible direct dental filling material. The surface of the silver powder must undergo an acid treatment to remove existing contaminants and prevent formation of new surface contaminants during consolidation. This study was designed to investigate the effect of the acid treatment on the strength of the consolidated alloy, its reactivity with the surrounding tooth structure, and its reactions with certain cavity liners.
This study investigated the effects of pH and concentration of fluoboric acid on the flexural strength of silver powder consolidated into rectangular beams in a partial 4 x 4 design. The study also assessed, by visible and scanning electron microscopy, what effect the acid-treated powders had on dentin that had been pre-coated with different cavity liners. Mean flexural strengths for beams consolidated using dental hand instruments were in the range (77.0 +/- 9.28) MPa to (166.1 +/- 17.6) MPa, where the quoted uncertainties are standard uncertainties (i.e., one standard deviation estimates). ANOVA indicated that fluoboric acid pH was highly significant (p <0.0001) with lower pH values resulting in higher flexural strength. Concentration alone was not a significant factor for flexural strengths, but there was a significant interaction between concentration and pH (p < 0.0001). Microscopy revealed that the acid-treated silver powder demineralized approximately 2 mu m of dentin when used with no liner. The use of copal or polyamide varnishes eliminated most of this demineralization, but the use of a dentin adhesive liner resulted in some dislodgment and breakdown of the adhesive film by the acid.
The results of this study indicate that this silver powder when treated with dilute fluoboric acid at a pH of approximately 1.0 can result in a filling material with strength equivalent to currently used conventional amalgam. The demineralization of tooth structure appears to be minimal and can be eliminated with the use of cavity liners.
C1 Natl Inst Stand & Technol, Amer Dent Assoc Hlth Fdn, Paffenbarger Res Ctr, Gaithersburg, MD 20899 USA.
USN, Sch Dent, Gaithersburg, MD 20899 USA.
RP Eichmiller, FC (reprint author), Natl Inst Stand & Technol, Amer Dent Assoc Hlth Fdn, Paffenbarger Res Ctr, Gaithersburg, MD 20899 USA.
NR 13
TC 1
Z9 1
U1 1
U2 2
PU US GOVERNMENT PRINTING OFFICE
PI WASHINGTON
PA SUPERINTENDENT DOCUMENTS,, WASHINGTON, DC 20402-9325 USA
SN 1044-677X
J9 J RES NATL INST STAN
JI J. Res. Natl. Inst. Stand. Technol.
PD SEP-OCT
PY 1998
VL 103
IS 5
BP 511
EP 516
DI 10.6028/jres.103.031
PG 6
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 143JZ
UT WOS:000077253200004
PM 28009374
ER
PT J
AU Moore, FG
McInville, RM
Hymer, TC
AF Moore, FG
McInville, RM
Hymer, TC
TI Review and extension of computational methods for noncircular
cross-sectional weapons
SO JOURNAL OF SPACECRAFT AND ROCKETS
LA English
DT Review
AB A review of current state-of-the-art methods for computing aerodynamics of noncircular cross-sectional weapon concepts has been performed. In addition, an improved engineering method has been developed to compute aerodynamics of these nonaxisymmetric body configurations. The improved method is based on extending current state-of-the-art methods for computing aerodynamics of noncircular wing-body shapes based on circular wing-body methods. Specific additions to the state-of the-art methods currently in use include extensions to a broader class of cross-sectional bodies and to a higher angle of attack; extensions to allow improved accuracy at low crossflow Mach number and to allow body cross-sectional shape to impact the critical crossflow Reynolds number; and a method to treat wing-body interference factor corrections as a function of body geometry, Mach number, and angle of attack. The new methods were applied to a broad class of noncircular body alone and wing-body configurations for which wind-tunnel data were available. In general, results for normal force, axial force, and center-of-pressure predictions were quite good for a semiempirical methodology, over the Mach number and angle-of-attack range where data were available. Range of variables included Mach numbers as low as 0.3 and as high as 14 and angles of attack to 60 deg.
C1 USN, Ctr Surface Warfare, Dahlgren, VA 22448 USA.
RP Moore, FG (reprint author), USN, Ctr Surface Warfare, Dahlgren, VA 22448 USA.
NR 34
TC 0
Z9 0
U1 0
U2 0
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 USA
SN 0022-4650
J9 J SPACECRAFT ROCKETS
JI J. Spacecr. Rockets
PD SEP-OCT
PY 1998
VL 35
IS 5
BP 585
EP 597
DI 10.2514/2.3380
PG 13
WC Engineering, Aerospace
SC Engineering
GA 129WT
UT WOS:000076487600001
ER
PT J
AU Poston, WL
Wegman, EJ
Solka, JL
AF Poston, WL
Wegman, EJ
Solka, JL
TI D-optimal design methods for robust estimation of multivariate location
and scatter
SO JOURNAL OF STATISTICAL PLANNING AND INFERENCE
LA English
DT Article
DE minimum volume ellipsoid; MVE; experimental design; D-optimal design;
information matrix; robust estimation
AB Using ideas and techniques from related disciplines frequently proves productive and often yields new insights and methods. In this paper, a method from experimental design is applied to the robust estimation of multivariate location and scatter. In particular, the procedure of determining discrete D-optimal designs is applied to the problem of finding the robust estimator called the minimum volume ellipsoid (MVE). The objective of the D-optimal design problem is to select h points to include in the design from a set of n candidate points such that the determinant of the information matrix is maximized. To calculate the MVE, a subset of h points must be selected where the volume of the ellipsoid covering them is the minimum over all possible subsets of size h. We demonstrate the relationship of these optimization problems and propose a technique to select the subset of points for both applications. The subset selection method is applied to several regression data sets where the true MVE estimate is known. (C) 1998 Published by Elsevier Science B.V. AII rights reserved.
C1 USN, Ctr Surface Warfare, Dahlgren Div, Dahlgren, VA 22448 USA.
George Mason Univ, Ctr Computat Stat, Fairfax, VA 22030 USA.
USN, Ctr Surface Warfare, Dahlgren Div, Dahlgren, VA 22448 USA.
NR 15
TC 4
Z9 4
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3758
J9 J STAT PLAN INFER
JI J. Stat. Plan. Infer.
PD SEP 1
PY 1998
VL 73
IS 1-2
BP 205
EP 213
DI 10.1016/S0378-3758(98)00062-7
PG 9
WC Statistics & Probability
SC Mathematics
GA 130NX
UT WOS:000076527100018
ER
PT J
AU Joyce, JA
AF Joyce, JA
TI Experimental justification for proposed changes to the measurement of
K-Ic using ASTM E 399
SO JOURNAL OF TESTING AND EVALUATION
LA English
DT Article
DE fracture mechanics; linear fracture mechanics; crack initiator; stress
intensity factor; size requirements; side grooves; T-stress
ID SPECIMEN GEOMETRIES
AB During the past five years considerable effort has been devoted to developing a fracture toughness measurement standard that combines the linear elastic stress intensity factor at the onset of crack extension, K-Ic, and the elastic-plastic fracture toughness measurement quantities, namely, J(Ic), the J resistance curve (J-R curve), and the corresponding crack tip opening displacement resistance curve (CTOD-R curve). The objective of this effort was to allow the engineer to start with one specimen geometry, conduct a specified test, develop either a K-Q, or a J(Q)-R curve, and then, after application of the relevant size requirements, obtain a valid fracture toughness result. At present, different specimens are required by E 399 and E 1737 (the combination and replacement of E 813 and E 1152), and if the engineer uses the E 399 specimen geometry and test procedure and subsequently finds that the measured K-Q fails the E 399 size requirements, new specimens must be machined and tested according to E 1737 to obtain valid fracture toughness measurements.
This paper describes experimental tests that have been conducted in parallel with the development of the new ASTM Standard E 1820-97, a combined fracture toughness test standard that is intended to address this problem. These experimental results show that the standard J integral specimen, incorporating load line crack mouth opening displacement measurements and side grooves, can be used to obtain K-Ic as presently defined by ASTM E 399. The use of larger a/W ranges is also supported by these results as long as the basic size requirements of E 399 are met and applied to both the specimen crack length and remaining ligament as well as to the specimen gross thickness.
C1 USN Acad, Annapolis, MD 21402 USA.
RP Joyce, JA (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 7
TC 3
Z9 3
U1 0
U2 3
PU AMER SOC TESTING MATERIALS
PI W CONSHOHOCKEN
PA 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 USA
SN 0090-3973
J9 J TEST EVAL
JI J. Test. Eval.
PD SEP
PY 1998
VL 26
IS 5
BP 455
EP 462
PG 8
WC Materials Science, Characterization & Testing
SC Materials Science
GA 123XU
UT WOS:000076151600006
ER
PT J
AU Yang, TC
Yates, T
AF Yang, TC
Yates, T
TI Matched-beam processing: Application to a horizontal line array in
shallow water
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID SOURCE LOCALIZATION; DEPTH; INVERSION; MISMATCH; RANGE
AB Matched-beam processing of a horizontal line array in a multipath shallow-water environment is presented. With conventional beamforming, the signal is split into several beams when the target is away from the broadside direction. This can result in signal gain degradation and severe bearing bias. Matched-beam processing is matched-field processing applied in the beam domain. It offers an efficient and robust approach for correcting bearing errors and signal gain degradation of horizontal Line arrays in shallow water. It is based on conventional beams but extends conventional processing to incorporate full-field processing. It is applicable to existing systems where the conventional beam outputs are the only data readily available. Many of the signal processing algorithms for horizontal arrays, such as adaptive beamforming for nulling strong interferences, can be incorporated directly into matched-beam processing. Target bearing tracking and depth discrimination are illustrated using matched-beam processing for a horizontal line array. [S0001-4966(98)03009-4].
C1 USN, Res Lab, Washington, DC 20375 USA.
Vector Res Co, Rockville, MD 20852 USA.
RP Yang, TC (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM yang@wave.nrl.navy.mil
NR 27
TC 13
Z9 14
U1 0
U2 0
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0001-4966
J9 J ACOUST SOC AM
JI J. Acoust. Soc. Am.
PD SEP
PY 1998
VL 104
IS 3
BP 1316
EP 1330
DI 10.1121/1.424341
PN 1
PG 15
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 118WW
UT WOS:000075864800020
ER
PT J
AU Kulkarni, RS
Siegmann, WL
Collins, MD
McDonald, BE
AF Kulkarni, RS
Siegmann, WL
Collins, MD
McDonald, BE
TI Nonlinear pulse propagation in shallow-water environments with
attenuating and dispersive sediments
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID ORDER PARABOLIC EQUATIONS; TIME-DOMAIN SOLUTION; ACOUSTIC PROPAGATION;
ELASTIC MEDIA; SEA-BOTTOM; OCEAN; FREQUENCY; SOUND
AB A hybrid treatment for wide-angle paraxial propagation that includes effects of both sediment dispersion and weak nonlinearity has been developed. A. Fourier transform approach is used to combine effects of refraction, diffraction, and sediment dispersion in the frequency domain, and nonlinear effects in the time domain. A nonlinear wide-angle time-domain equation developed recently is first split into linear and nonlinear component equations. The linear equation is decomposed into its discrete frequency-domain counterparts. Sediment attenuation and dispersion are incorporated using a complex wave number along with a frequency-dependent formula for phase velocity to satisfy causality. The numerical implementation consists of first decomposing a broadband source into its frequency components and propagating them over a range step using a wide-angle parabolic equation. Fourier synthesis is used to reconstruct the signal which is then corrected to account for nonlinear effects in the time domain. Numerical examples illustrating the effects of dispersion and nonlinearity on shallow-water wide-angle propagation are presented and compared with available results. (C) 1998 Acoustical Society of America. [S0001-4966(98)00709-7].
C1 Rensselaer Polytech Inst, Troy, NY 12180 USA.
USN, Res Lab, Washington, DC 20375 USA.
RP Kulkarni, RS (reprint author), Rensselaer Polytech Inst, Troy, NY 12180 USA.
NR 41
TC 4
Z9 4
U1 0
U2 1
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0001-4966
J9 J ACOUST SOC AM
JI J. Acoust. Soc. Am.
PD SEP
PY 1998
VL 104
IS 3
BP 1356
EP 1362
DI 10.1121/1.424344
PN 1
PG 7
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 118WW
UT WOS:000075864800023
ER
PT J
AU Mendel, LL
Hamill, BW
Hendrix, JE
Crepeau, LJ
Pelton, JD
Miley, MD
Kadlec, EE
AF Mendel, LL
Hamill, BW
Hendrix, JE
Crepeau, LJ
Pelton, JD
Miley, MD
Kadlec, EE
TI Speech intelligibility assessment in a helium environment. II. The
speech intelligibility index
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
AB The Speech Intelligibility Index (SII) was measured for Navy divers participating in two saturation deep dives and for a group of nondivers to test different communication systems and their components. These SIIs were validated using the Speech Perception in Noise (SPIN) test and the Griffiths version of the Modified Rhyme Test (GMRT). Our goal was to determine if either of these assessments was sensitive enough to provide an objective measure of speech intelligibility when speech was processed through different helmets and helium speech unscramblers (HSUs). Results indicated that SII values and percent intelligibility decreased incrementally as background noise level increased. SIIs were very reliable across the different groups of subjects indicating that the SII was a strong measurement for predicting speech intelligibility to compare linear system components such as helmets. The Sn was not useful in measuring intelligibility through nonlinear devices such as HSUs. The speech intelligibility scores on the GMRT and SPIN tests were useful when the system component being compared had a large measurable difference, such as in helmet type. However, when the differences were more subtle, such as differences in HSUs, neither the SPIN nor the GMRT appeared sensitive enough to make such distinctions. These results have theoretical as well as practical value for measuring the quality and intelligibility of helium speech enhancement systems. (C) 1998 Acoustical Society of America. [S0001-4966(98)03109-9]
C1 Univ Mississippi, Dept Communicat Disorders, Ctr Speech & Hearing Res, University, MS 38677 USA.
Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA.
Oxford Signal Proc, Oxford, MS 38655 USA.
USN, Expt Diving Unit, Panama City, FL 32407 USA.
XN Technol, Cheney, WA 99004 USA.
Univ Georgia, Athens, GA 30602 USA.
RP Mendel, LL (reprint author), Univ Mississippi, Dept Communicat Disorders, Ctr Speech & Hearing Res, University, MS 38677 USA.
NR 15
TC 2
Z9 2
U1 0
U2 2
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0001-4966
J9 J ACOUST SOC AM
JI J. Acoust. Soc. Am.
PD SEP
PY 1998
VL 104
IS 3
BP 1609
EP 1615
PN 1
PG 7
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 118WW
UT WOS:000075864800052
PM 9745744
ER
PT J
AU Gaunaurd, GC
AF Gaunaurd, GC
TI Analysis and comparison of recent resonance scattering formulations by
M.S. Choi et al. with earlier, traditional RST works
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Letter
ID BACKGROUND COEFFICIENTS; CYLINDRICAL-SHELLS; ELASTIC SHELLS;
SPECTROGRAMS; SOUND
AB Some comparisons are studied between several recent (1997 and 1998) formulations of acoustic resonance scattering, by M. S. Choi et al. and other earlier, traditional ones. In the practical cases here analyzed, the recent formulations are: (a) more complicated; (b) of purely formal character; (c) make use of information not known or available a priori; (d) eventually reduce to the traditional ones; and (e) seem to offer little new practical advantages. Finally, none of these formulations has been used for target identification purposes, which is the essential underlying reason for these investigations. [S0001-4966(98)05608-2]
C1 USN, Ctr Surface Warfare, Carderock Div, W Bethesda, MD 20817 USA.
RP Gaunaurd, GC (reprint author), USN, Ctr Surface Warfare, Carderock Div, Code 684,9500 MacArthur Blvd, W Bethesda, MD 20817 USA.
NR 13
TC 4
Z9 4
U1 0
U2 1
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0001-4966
J9 J ACOUST SOC AM
JI J. Acoust. Soc. Am.
PD SEP
PY 1998
VL 104
IS 3
BP 1720
EP 1722
DI 10.1121/1.424385
PN 1
PG 3
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 118WW
UT WOS:000075864800064
ER
PT J
AU Forst, D
Li, JF
Xu, ZK
AF Forst, D
Li, JF
Xu, ZK
TI Incommensurately modulated polar structures in antiferroelectric
tin-modified lead zirconate titanate: II, dependence of
structure-property relations on tin content
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID PHASE-TRANSITIONS; CERAMICS; TRANSFORMATION; IMPURITIES; ROTATIONS;
NIOBATE; DEFECT
AB Studies of the structure-property relations in Pb0.98Nb0.02-[(Zr1-xSnx)(0.97)Ti-3](1-z)O-3 (PZST x/3/2) were performed for 0 < x < 0.50 by transmission electron microscopy, dielectric spectroscopy, and electrically induced polarization and strain methods. As the tin content increased, a general sequence of changes in phase stability was observed, including (i) a ferroelectric rhombohedral (FEr) phase (x < 0.15), (ii) a coexistence of FEr and antiferroelectric incommensurate (AFE(in)) states (x = 0.15), and (iii) an AFE(in) state (x > 0.15), Evidence will be presented that incommensurately modulated structures become pinned into long-lived metastable states by quenched tin impurities, rather than evolving toward a commensurate phase. Maximum electrically induced strains (epsilon) and polarizations (P) were found in the compositional range of x approximate to 0.15, where FEr and AFE(in) regions coexisted, Values of epsilon as large as 0.5% were found at field strengths of <80 kV/cm, In addition, these studies demonstrated evidence for two electrically induced phase transitions (x = 0.15): (i) an antiferroelectric-ferroelectric (AFE-FE) transition near 40 kV/cm, and (ii) a secondary ferroelectric-ferroelectric (FE-FE) transition near 60-80 kV/cm, The dominate contribution to epsilon was associated with the secondary transition, whereas the dominate contribution to P was associated with the first. For x < 0.15, evidence of an induced FE-FE transition was found, For x > 0,15, an induced AFE-FE transition was evident, However, no indications of a secondary FE-FE transition were observed. Large epsilon values were not induced until field levels significantly greater than that required to induced polarization saturation were obtained, which indicates a decoupling of epsilon and P.
C1 Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA.
USN, Undersea Warfare Ctr, Transduct Res & Dev Branch, Newport, RI 02841 USA.
RP Forst, D (reprint author), Motorola Inc, Div Ceram, Albuquerque, NM USA.
OI XU, Zhengkui/0000-0002-7465-8513
NR 31
TC 9
Z9 9
U1 5
U2 14
PU AMER CERAMIC SOC
PI WESTERVILLE
PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 USA
SN 0002-7820
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD SEP
PY 1998
VL 81
IS 9
BP 2225
EP 2236
PG 12
WC Materials Science, Ceramics
SC Materials Science
GA 121AB
UT WOS:000075989000002
ER
PT J
AU Afanas'ev, VV
Stesmans, A
Revesz, AG
Hughes, HL
AF Afanas'ev, VV
Stesmans, A
Revesz, AG
Hughes, HL
TI Oxygen vacancies in SiO2, layers an Si produced at high temperature
SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY
LA English
DT Article
ID SIMOX BURIED OXIDES; SI/SIO2/SI STRUCTURES; IMPLANTATION; GENERATION;
DEFECTS; INJECTION; OXIDATION; TRAPS
AB Oxygen vacancy centers in buried oxide (BOX) layers of Si/SiO2/Si structures produced by implantation of oxygen ions into silicon and subsequent internal thermal oxidation (ITOX) were studied by monitoring hole trapping and paramagnetic properties. During the ITOX process the BOX layer is augmented by thermally grown oxide. We have found that this additional buried thermal oxide layer has nearly the same density of O vacancies as the initial buried oxide, and an even higher number of oxygen vacancy clusters (E-delta' centers), even though the superficial Si layer was saturated by oxygen. This result suggests the generation of oxygen vacancies in Si-confined SiO2 to be due to temperature driven interaction between Si and SiO2. The clustering of the oxygen vacancies observed in all the high temperature oxides (both buried and unconfined), and the inverted relationship between the vacancy charge and its paramagnetic state point toward changes in the SiO2 network structure as compared to the conventional oxides.
C1 Univ Louvain, Dept Phys, B-3001 Louvain, Belgium.
Revesz Associates, Bethesda, MD 20817 USA.
USN, Res Lab, Washington, DC 20375 USA.
RP Afanas'ev, VV (reprint author), Univ Louvain, Dept Phys, B-3001 Louvain, Belgium.
NR 28
TC 10
Z9 10
U1 0
U2 0
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
SN 0013-4651
J9 J ELECTROCHEM SOC
JI J. Electrochem. Soc.
PD SEP
PY 1998
VL 145
IS 9
BP 3157
EP 3160
DI 10.1149/1.1838779
PG 4
WC Electrochemistry; Materials Science, Coatings & Films
SC Electrochemistry; Materials Science
GA 112DR
UT WOS:000075479300031
ER
PT J
AU Ehrlich, Y
Cohen, C
Kaganovich, D
Zigler, A
Hubbard, RF
Sprangle, P
Esarey, E
AF Ehrlich, Y
Cohen, C
Kaganovich, D
Zigler, A
Hubbard, RF
Sprangle, P
Esarey, E
TI Guiding and damping of high-intensity laser pulses in long plasma
channels
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
ID PARTIALLY STRIPPED PLASMAS; WAVE-GUIDE; HARMONIC-GENERATION; ELECTRON
ACCELERATION; PROPAGATION; BEAMS; STABILITY; GASES; IONIZATION
AB An experimental demonstration is presented of large-distance (up to 6.6 cm, or 75 Rayleigh lengths) guiding of high-intensity (>10(16) W cm(-2)) laser pulses in a plasma channel produced by a capillary discharge. Theory and simulation are used to describe damped oscillations that occur in the laser spot size as well as laser-induced ionization within the channel. Good agreement is obtained between theory, simulation, and experiment. (C) 1998 Optical Society of America.
C1 Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel.
USN, Res Lab, Div Plasma Phys, Beam Phys Branch, Washington, DC 20375 USA.
RP Ehrlich, Y (reprint author), Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel.
OI Kaganovich, Dmitri/0000-0002-0905-5871
NR 41
TC 41
Z9 41
U1 0
U2 3
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0740-3224
J9 J OPT SOC AM B
JI J. Opt. Soc. Am. B-Opt. Phys.
PD SEP
PY 1998
VL 15
IS 9
BP 2416
EP 2423
DI 10.1364/JOSAB.15.002416
PG 8
WC Optics
SC Optics
GA 117VK
UT WOS:000075803200010
ER
PT J
AU Lavernia, EJ
Kabacoff, L
AF Lavernia, EJ
Kabacoff, L
TI Thermal spray processing of nanostructured materials
SO JOURNAL OF THERMAL SPRAY TECHNOLOGY
LA English
DT Editorial Material
C1 Univ Calif Irvine, Irvine, CA 92717 USA.
Off Naval Res, Arlington, VA 22217 USA.
RP Lavernia, EJ (reprint author), Univ Calif Irvine, Irvine, CA 92717 USA.
NR 0
TC 2
Z9 2
U1 0
U2 1
PU ASM INTERNATIONAL
PI MATERIALS PARK
PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002
USA
SN 1059-9630
J9 J THERM SPRAY TECHN
JI J. Therm. Spray Technol.
PD SEP
PY 1998
VL 7
IS 3
BP 291
EP 291
DI 10.1007/s11666-998-0053-9
PG 1
WC Materials Science, Coatings & Films
SC Materials Science
GA 119WF
UT WOS:000075920600001
ER
PT J
AU Ransom, B
Shea, KF
Burkett, PJ
Bennett, RH
Baerwald, R
AF Ransom, B
Shea, KF
Burkett, PJ
Bennett, RH
Baerwald, R
TI Comparison of pelagic and nepheloid layer marine snow: implications for
carbon cycling
SO MARINE GEOLOGY
LA English
DT Article
DE nepheloid layer; marine snow; organic carbon; continental margin; TEM
ID CALIFORNIA CURRENT SYSTEM; CONTINENTAL-MARGIN; ORGANIC-MATTER; WATER
COLUMN; PARTICLES; SEDIMENTS; NORTHERN; OCEAN; SHELF; TRANSPORT
AB Marine snow from upper and mid-water (i.e., pelagic) depths on the California margin is texturally and compositionally different from that traveling in the nepheloid layer. Transmission electron microscopy shows that pelagic marine snow consists primarily of bioclasts (e.g., diatom frustules, foram tests), organic matter, and microbes. These components are entrained as discrete particles or small aggregates (less than or equal to 10 mu m in diameter) in a loose network of exocellular, muco-polysaccharide material. Clays are infrequent but, when present, are constituents of comparatively compact organic-rich microaggregates. Microbes are abundant and appear to decrease in number with increasing water depth. In contrast, marine snow aggregates collected from just above the sea floor in the nepheloid layer are assemblages of clay particles, clay flocs, and relatively dense clay-organic-rich microaggregates in an exocellular organic matrix. Bioclasts and microorganisms occur only rarely. The prevalence of clay-organic-rich aggregates in the nepheloid layer suggests that, prior to final deposition and burial, marine snow from the pelagic zone is subject to disaggregation and recombination with terrigenous detrital material near or at the sea floor. Results have significant implications for the accumulation and burial rates of organic carbon on continental margins and the aging and bioavailability of sedimentary organic matter. Samples examined were collected offshore of northern and central California. (C) 1998 Elsevier Science B.V. All rights reserved.
C1 Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
SEAPROBE Inc, Picayune, MS 39566 USA.
Univ New Orleans, Dept Biol, New Orleans, LA 70148 USA.
RP Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
EM ransom@ucsd.edu
NR 44
TC 39
Z9 43
U1 1
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0025-3227
EI 1872-6151
J9 MAR GEOL
JI Mar. Geol.
PD SEP
PY 1998
VL 150
IS 1-4
BP 39
EP 50
DI 10.1016/S0025-3227(98)00052-8
PG 12
WC Geosciences, Multidisciplinary; Oceanography
SC Geology; Oceanography
GA 136ZU
UT WOS:000076889600003
ER
PT J
AU Briscoe, MG
Kinder, TH
AF Briscoe, MG
Kinder, TH
TI ONRs accelerated research initiatives (ARIs)
SO MARINE TECHNOLOGY SOCIETY JOURNAL
LA English
DT Editorial Material
C1 Off Naval Res, Ocean Atmosphere & Space Sci & Technol Dept, Arlington, VA 22217 USA.
RP Briscoe, MG (reprint author), Off Naval Res, Ocean Atmosphere & Space Sci & Technol Dept, Arlington, VA 22217 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU MARINE TECHNOLOGY SOC INC
PI WASHINGTON
PA C/O I CLAYION MATTHEWS, 1828 L ST, NW, 9TH FL, WASHINGTON, DC 20036 USA
SN 0025-3324
J9 MAR TECHNOL SOC J
JI Mar. Technol. Soc. J.
PD FAL
PY 1998
VL 32
IS 3
BP 81
EP 84
PG 4
WC Engineering, Ocean; Oceanography
SC Engineering; Oceanography
GA 148LH
UT WOS:000077506400010
ER
PT J
AU Sperling, LC
Mezebish, DS
AF Sperling, LC
Mezebish, DS
TI Hair diseases
SO MEDICAL CLINICS OF NORTH AMERICA
LA English
DT Article
ID ANDROGENIC DISORDERS; ALOPECIA; WOMEN; HISTOPATHOLOGY; DIAGNOSIS;
BIOLOGY
AB A few common causes of hair loss account for the vast majority of cases. A well-directed history and simple physical examination is often sufficient to make a diagnosis. Laboratory testing is often unnecessary. A scalp biopsy can be useful, but only if processed and interpreted correctly. Androgenetic alopecia, alopecia areata, senescent alopecia, telogen effluvium, traction alopecia, trichotillomania, and cosmetic hair damage are common causes of nonscarring alopecia. Discoid lupus erythematosus, lichen planopilaris, and central, centrifugal scarring alopecia are the most common forms of scarring hair loss.
C1 Uniformed Serv Univ Hlth Sci, Dept Dermatol, Bethesda, MD 20814 USA.
USN, Natl Med Ctr, Dept Dermatol, Bethesda, MD 20084 USA.
Walter Reed Army Med Ctr, Dermatol Serv, Washington, DC 20307 USA.
RP Sperling, LC (reprint author), Uniformed Serv Univ Hlth Sci, Dept Dermatol, 4301 Jones Bridge Rd, Bethesda, MD 20814 USA.
NR 18
TC 19
Z9 19
U1 0
U2 2
PU W B SAUNDERS CO
PI PHILADELPHIA
PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA
19106-3399 USA
SN 0025-7125
J9 MED CLIN N AM
JI Med. Clin. N. Am.
PD SEP
PY 1998
VL 82
IS 5
BP 1155
EP +
DI 10.1016/S0025-7125(05)70408-9
PG 16
WC Medicine, General & Internal
SC General & Internal Medicine
GA 124MZ
UT WOS:000076187500009
PM 9769798
ER
PT J
AU Pande, CS
Masumura, RA
Marsh, SP
AF Pande, CS
Masumura, RA
Marsh, SP
TI The sweep constant concept in phase coarsening
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID GRAIN-GROWTH
AB An expression for sweep constant originally introduced for grain growth is derived in terms of the parameters of the size distribution. The sweep constant is extended to the phenomenon of phase coarsening. It is shown that a relationship exists between the sweep constant, coarsening rate, and volume fraction of the particles undergoing coarsening.
C1 USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA.
RP Pande, CS (reprint author), USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD SEP
PY 1998
VL 29
IS 9
BP 2395
EP 2398
DI 10.1007/s11661-998-0115-0
PG 4
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 120WX
UT WOS:000075981400016
ER
PT J
AU Dutta, I
Quiles, FN
McNelley, TR
Nagarajan, R
AF Dutta, I
Quiles, FN
McNelley, TR
Nagarajan, R
TI Optimization of the strength-fracture toughness relation in
particulate-reinforced aluminum composites via control of the matrix
microstructure
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID GRAIN-SIZE; MECHANICAL-PROPERTIES; AGING RESPONSE; DEFORMATION; GROWTH;
CAST; PRECIPITATION
AB The evolution of the microstructure and mechanical properties of a 17.5 vol. pet SiC particulate-reinforced aluminum alloy 6092-matrix composite has been studied as a function of postfabrication processing and heat treatment. It is demonstrated that, by the control of particulate distribution, matrix grain, and substructure and of the matrix precipitate state, the strength-toughness combination in the composite can be optimized over a wide range of properties, without resorting to unstable, underaged (UA) matrix microstructures, which are usually deemed necessary to produce a higher fracture toughness than that displayed in the peak-aged condition. Further, it is demonstrated that, following an appropriate combination of thermomechanical processing and unconventional heat treatment, the composite may possess better stiffness, strength, and fracture toughness than a similar unreinforced alloy. In the high- and low-strength matrix microstructural conditions, the matrix grain and substructure were found to play a substantial role in determining fracture properties. However, in the intermediate-strength regime, properties appeared to be optimizable by the utilization of heat treatments only. These observations are rationalized on the basis of current understanding of the grain size dependence of fracture toughness and the detailed microstructural features resulting from thermomechanical treatments.
C1 USN, Postgrad Sch, Dept Mech Engn, Monterey, CA 93943 USA.
USN, Postgrad Sch, Dept Engn Mech, Washington, DC USA.
RP Dutta, I (reprint author), USN, Postgrad Sch, Dept Mech Engn, Monterey, CA 93943 USA.
NR 48
TC 9
Z9 9
U1 1
U2 2
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD SEP
PY 1998
VL 29
IS 9
BP 2433
EP 2446
DI 10.1007/s11661-998-0119-9
PG 14
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 120WX
UT WOS:000075981400020
ER
PT J
AU Conard, R
Emanuel, R
AF Conard, R
Emanuel, R
TI Aggressive and impulsive behavior in military psychiatric inpatients
SO MILITARY MEDICINE
LA English
DT Article
ID PREDICTORS; SUICIDE; RISK
AB Objective: To determine if a history of aggressive/impulsive behavior adversely affected the return to full duty of a military psychiatric inpatient population, Method: Charts were reviewed for aggressive/impulsive behavior as indicated by self-report on a standardized admission form and by history in 211 consecutive admissions pooled from two separate 2-month intervals during a 9-month period. Results: Seventy-three percent of the population was between the ages of 17 and 24 years. Sixty- eight percent of the population reported a history of at least one school suspension/expulsion, arrest, or military nonjudicial punishment (males, 74%; females, 45%). Seven percent of patients reporting aggressive/impulsive behavior were returned to full duty unconditionally, compared with 28% of patients not reporting said behavior. Eighteen percent of patients met the criteria for adult antisocial behavior. Only one patient with adult antisocial behavior was returned to full duty. Conclusions: This study found that a history of aggressive/impulsive behavior was positively correlated with substance abuse and negatively correlated with return to full military duty.
C1 USN, Med Ctr, Dept Psychiat, Portsmouth, VA USA.
RP Conard, R (reprint author), USN, Med Ctr, Dept Psychiat, Portsmouth, VA USA.
NR 18
TC 0
Z9 1
U1 0
U2 1
PU ASSN MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
J9 MIL MED
JI Milit. Med.
PD SEP
PY 1998
VL 163
IS 9
BP 594
EP 598
PG 5
WC Medicine, General & Internal
SC General & Internal Medicine
GA 116YG
UT WOS:000075752200003
PM 9753983
ER
PT J
AU Weinstein, ML
AF Weinstein, ML
TI Update on wound healing: A review of the literature
SO MILITARY MEDICINE
LA English
DT Review
ID ULCERS
C1 USN Hosp, Dept Phys Therapy, Camp Lejeune, NC 28547 USA.
RP Weinstein, ML (reprint author), USN Hosp, Dept Phys Therapy, Camp Lejeune, NC 28547 USA.
NR 15
TC 4
Z9 6
U1 1
U2 1
PU ASSN MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
J9 MIL MED
JI Milit. Med.
PD SEP
PY 1998
VL 163
IS 9
BP 620
EP 624
PG 5
WC Medicine, General & Internal
SC General & Internal Medicine
GA 116YG
UT WOS:000075752200008
PM 9753988
ER
PT J
AU Lee, RL
AF Lee, RL
TI The hidden cost of tobacco smoke
SO MILITARY MEDICINE
LA English
DT Letter
C1 USN, Med Corps, Dept Pediat, Med Ctr, Portsmouth, VA USA.
RP Lee, RL (reprint author), USN, Med Corps, Dept Pediat, Med Ctr, Portsmouth, VA USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASSN MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
J9 MIL MED
JI Milit. Med.
PD SEP
PY 1998
VL 163
IS 9
BP 624
EP 624
PG 1
WC Medicine, General & Internal
SC General & Internal Medicine
GA 116YG
UT WOS:000075752200009
PM 9753989
ER
PT J
AU Abraham, FF
Brodbeck, D
Rudge, WE
Broughton, JQ
Schneider, D
Land, B
Lifka, D
Gerner, J
Rosenkrantz, M
Skovira, J
Gao, H
AF Abraham, FF
Brodbeck, D
Rudge, WE
Broughton, JQ
Schneider, D
Land, B
Lifka, D
Gerner, J
Rosenkrantz, M
Skovira, J
Gao, H
TI Ab initio dynamics of rapid fracture
SO MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT International Conference on Computational Physics
CY AUG 25-28, 1997
CL UNIV CA, SANTA CRUZ, SANTA CRUZ, CALIFORNIA
SP Amer Phys Soc, Div Computat Phys & Forum Ind & Appl Phys, Int Union Pure & Appl Phys, European Phys Soc
HO UNIV CA, SANTA CRUZ
ID MOLECULAR-DYNAMICS; INSTABILITY DYNAMICS; BRITTLE; CRACKS; SIMULATION;
MECHANICS; COMPUTER
AB As our title implies, we consider materials failure at the fundamental level of atomic bond breaking and motion. Using computational molecular dynamics, scalable parallel computers and visualization, we are studying the failure of notched solids under tension using in excess of 10(8) atoms. In rapid brittle fracture, two of the most intriguing features are the roughening of a crack's surface with increasing speed and the terminal crack speed which is much less than the theoretical prediction. Our two-dimensional simulations show conclusively that a dynamic instability of the crack motion occurs as it approaches one-third of the surface sound speed. This discovery provides an explanation for the crack's surface roughening and limiting speed. For three-dimensional slabs, we find that an intrinsically ductile FCC crystal can experience brittle failure for certain crack orientations. A dynamic instability also occurs, but brittle failure is not maintained. The instability is immediately followed by a brittle-to-ductile transition and plasticity. Hyperelasticity, or the elasticity near failure, governs many of the failure processes observed in our simulations and its many roles are elucidated.
C1 IBM Corp, Almaden Res Ctr, Div Res, San Jose, CA 95120 USA.
USN, Res Lab, Washington, DC 20375 USA.
Cornell Univ, Cornell Theory Ctr, Ithaca, NY 14853 USA.
Stanford Univ, Div Mech & Computat, Stanford, CA 94305 USA.
RP Abraham, FF (reprint author), IBM Corp, Almaden Res Ctr, Div Res, San Jose, CA 95120 USA.
RI Gao, Huajian/F-9360-2010; Schneider, David/H-2236-2012
OI Schneider, David/0000-0002-2124-8385
NR 25
TC 24
Z9 24
U1 1
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0965-0393
J9 MODEL SIMUL MATER SC
JI Model. Simul. Mater. Sci. Eng.
PD SEP
PY 1998
VL 6
IS 5
BP 639
EP 670
DI 10.1088/0965-0393/6/5/010
PG 32
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 136EB
UT WOS:000076844600010
ER
PT J
AU Knutson, EM
AF Knutson, EM
TI The rhythm of French: French pronunciation tutor for English speakers.
SO MODERN LANGUAGE JOURNAL
LA English
DT Book Review
C1 USN Acad, Annapolis, MD 21402 USA.
RP Knutson, EM (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU UNIV WISCONSIN PRESS
PI MADISON
PA JOURNAL DIVISION, 2537 DANIELS ST, MADISON, WI 53718 USA
SN 0026-7902
J9 MOD LANG J
JI Mod. Lang. J.
PD FAL
PY 1998
VL 82
IS 3
BP 434
EP 434
DI 10.2307/329980
PG 1
WC Education & Educational Research; Linguistics
SC Education & Educational Research; Linguistics
GA 125NP
UT WOS:000076243900023
ER
PT J
AU Ralph, FM
Armi, L
Bane, JM
Dorman, C
Neff, WD
Neiman, PJ
Nuss, W
Persson, POG
AF Ralph, FM
Armi, L
Bane, JM
Dorman, C
Neff, WD
Neiman, PJ
Nuss, W
Persson, POG
TI Observations and analysis of the 10-11 June 1994 coastally trapped
disturbance
SO MONTHLY WEATHER REVIEW
LA English
DT Article
ID STATES WEST-COAST; KELVIN WAVES; NORTHERN CALIFORNIA; MESOSCALE RIDGES;
LOWER ATMOSPHERE; WIND REVERSALS; MARINE-LAYER; POTENTIAL VORTICITY;
BOUNDARY-LAYER; CATALINA EDDY
AB A coastally trapped disturbance (CTD), characterized by southerly flow at the surface on 10-11 June 1994, was observed from the California Eight to Bodega Bay during a field experiment along the California coast. (North-south approximates the coast-parallel direction.) Data from a special observational network of wind profilers, radio acoustic sounding systems, special surface data, balloon ascents, and a research aircraft were used with satellite and synoptic data to explore both the CTD structure and the regional-scale changes before the event.
The disruption of the climatological northerly flow along the central California coast, which preconditioned the area for the development of a CTD, began with the eastward movement of a surface high into Washington and Oregon and the amplification of a thermal low in northern California. As with most CTDs in the region, this occurred over the 2-3 days preceding the CTD's initiation. These large-scale changes caused westward advection of warm continental air across much of the California coast, which increased temperatures by 10 degrees-12 degrees C in the layer from 0.4 to 2.0 km above mean sea level (MSL) during the 48 h before southerly how appeared offshore at the surface. The warming reversed the alongshore sea level pressure gradients near the coast by creating a region of pressure falls extending along 600-1000 km of the coast. This also modified the cross-shore pressure gradient and thus the geostrophic alongshore flow. The warming along the coast also increased the strength of the temperature inversion capping the marine boundary layer (MBL) by a factor of 2-4 over 48 h. The synoptic-scale changes also moved the axis of the climatological near-surface, northerly jet much farther offshore from central California and strengthened this jet near the headlands of Gapes Mendocino and Blanco.
The development and decay of southerly flow at the surface along the coast coincided roughly with the evolution of a mesoscale low 200 km offshore, and of a coastal ridge roughly 100 km wide. However, the CTD initiation also followed a 500-m thickening of the MBL inversion in the California Eight region where a Catalina eddy was initially present. At surface sites, the CTD was marked by the passage of a pressure trough, followed by a gradual shift to southerly flow and the appearance of clouds. The area of low cloud was not coincident with the region of southerly flow. The transition to southerly flow propagated northward along shore at 11.9 +/- 0.3 m s(-1) on 10 June, stalled for 11-12 h during the part of the diurnal cycle normally characterized by enhanced northerly flow, and then continued propagating northward along shore at 11.6 m s(-1). Both the geostrophic wind and the isallobaric component of the ageostrophic wind were consistent with southerly how at the surface. Southerly flow was observed up to 5 km MSL in this event and in others, which indicates that the synoptic-scale environment of many CTDs in this region may include a deep tropospheric cyclonic circulation or trough offshore.
Both cross-shore and alongshore flights performed by a research aircraft documented the CTD structure and showed that the southerly flow extended at least 100 km offshore and appeared first within the MBL inversion as the inversion thickened upward. While the top of the inversion rose, the height of the inversion's base remained almost unchanged. The thickening of the inversion decreased with distance offshore, and there was no significant change in the MBL depth (i.e., the inversion base height), until 12-14 h after the surface wind shift. Thus, it is suggested that two-layer, shallow water idealizations may be unable to represent this phenomenon adequately. Nonetheless. the gradual wind shift, the thickening inversion, and the correlation between southerly flow and a mesoscale coastal pressure ridge are consistent with a coastally trapped Kelvin wave, albeit one with a higher-order vertical structure that can exist in a two-layer model. However. the semipermanent nature of the changes in the MBL and its inversion is more characteristic of a shallowly sloped internal bore. The temperature increase and lack of southerly flow exceeding the northward phase speed are inconsistent with gravity current behavior.
C1 NOAA, ERL, Environm Technol Lab, Boulder, CO 80303 USA.
Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
Univ N Carolina, Marine Sci Program, Chapel Hill, NC USA.
USN, Postgrad Sch, Dept Meteorol, Monterey, CA 93943 USA.
Univ Colorado, NOAA, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA.
RP Ralph, FM (reprint author), NOAA, ERL, Environm Technol Lab, Mail Code R-E-ET7,325 Broadway, Boulder, CO 80303 USA.
RI Neff, William/E-2725-2010
OI Neff, William/0000-0003-4047-7076
NR 50
TC 34
Z9 35
U1 0
U2 2
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0027-0644
J9 MON WEATHER REV
JI Mon. Weather Rev.
PD SEP
PY 1998
VL 126
IS 9
BP 2435
EP 2465
DI 10.1175/1520-0493(1998)126<2435:OAAOTJ>2.0.CO;2
PG 31
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 114VE
UT WOS:000075629200008
ER
PT J
AU Morgan, WB
Lin, WC
AF Morgan, WB
Lin, WC
TI Predicting ship hydrodynamic performance in today's world
SO NAVAL ENGINEERS JOURNAL
LA English
DT Article
AB The current status of ship hydrodynamic performance predictions is reviewed in light of available techniques for both scale-model experiments and computations. Possibilities of more efficient and preferable procedures for performing model basin tasks through strategic integration of various theoretical/computational and experimental methods are discussed with a perspective toward future development.
C1 USN, Ctr Surface Warfare, Carderock Div, Silver Spring, MD 20910 USA.
RP Morgan, WB (reprint author), USN, Ctr Surface Warfare, Carderock Div, Silver Spring, MD 20910 USA.
NR 47
TC 2
Z9 2
U1 0
U2 0
PU AMER SOC NAVAL ENG INC
PI ALEXANDRIA
PA 1452 DUKE STREET, ALEXANDRIA, VA 22314-3458 USA
SN 0028-1425
J9 NAV ENG J
JI Nav. Eng. J.
PD SEP
PY 1998
VL 110
IS 5
BP 91
EP 98
PG 8
WC Engineering, Marine; Engineering, Civil; Oceanography
SC Engineering; Oceanography
GA 147YH
UT WOS:000077525100007
ER
PT J
AU Apte, A
Jayasuriya, A
Kennington, J
Krass, I
Mohamed, R
Sorensen, S
Whitler, J
AF Apte, A
Jayasuriya, A
Kennington, J
Krass, I
Mohamed, R
Sorensen, S
Whitler, J
TI Class scheduling algorithms for Navy training schools
SO NAVAL RESEARCH LOGISTICS
LA English
DT Article
ID TRAVELING SALESMAN PROBLEM; OPTIMIZATION
AB The problem of developing good schedules for Navy C-Schools has been modeled as a combinatorial optimization problem. The only complicating feature of the problem is that classes must be grouped together into sequences known as pipelines. An ideal schedule will have all classes in a pipeline scheduled in consecutive weeks. The objective is to eliminate the nonproductive time spent by sailors at C-Schools who are waiting for the next class in a pipeline. In this investigation an implicit enumeration procedure for this problem was developed. The key component of our algorithm is a specialized greedy algorithm which is used to obtain a good initial incumbent. Often this initial incumbent is either an optimal schedule or a near optimal schedule. In an empirical analysis with the only other competing software system, our greedy heuristic found equivalent or better solutions in substantially less computer time. This greedy heuristic was extended and modified for the A-School scheduling problem and aias found to be superior to its only competitor. (C) 1998 John Wiley & Sons, Inc.
C1 So Methodist Univ, Dept Comp Sci & Engn, Dallas, TX 75275 USA.
Defense Manpower Data Ctr, Monterey, CA 93490 USA.
Cairo Univ, Cairo, Egypt.
USN, Ctr Personnel Res & Dev, San Diego, CA 92152 USA.
RP Kennington, J (reprint author), So Methodist Univ, Dept Comp Sci & Engn, Dallas, TX 75275 USA.
NR 18
TC 3
Z9 3
U1 0
U2 1
PU JOHN WILEY & SONS INC
PI NEW YORK
PA 605 THIRD AVE, NEW YORK, NY 10158-0012 USA
SN 0894-069X
J9 NAV RES LOG
JI Nav. Res. Logist.
PD SEP
PY 1998
VL 45
IS 6
BP 533
EP 551
DI 10.1002/(SICI)1520-6750(199809)45:6<533::AID-NAV1>3.0.CO;2-3
PG 19
WC Operations Research & Management Science
SC Operations Research & Management Science
GA 111GA
UT WOS:000075427900001
ER
PT J
AU Kang, JU
Posey, R
AF Kang, JU
Posey, R
TI Demonstration of supercontinuum generation in a long-cavity fiber ring
laser
SO OPTICS LETTERS
LA English
DT Article
AB We demonstrate generation of supercontinuum pulses directly from a passively mode-locked long-cavity fiber ring laser. The laser output exhibited a blueshifted spectrum extending from 1350 to 1550 nm with an average output power greater than 60 mW. (C) 1998 Optical Society of America.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Kang, JU (reprint author), USN, Res Lab, Code 5670, Washington, DC 20375 USA.
RI Kang, Jin/A-3228-2010
NR 9
TC 13
Z9 14
U1 0
U2 3
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD SEP 1
PY 1998
VL 23
IS 17
BP 1375
EP 1377
DI 10.1364/OL.23.001375
PG 3
WC Optics
SC Optics
GA 115ZX
UT WOS:000075697400016
PM 18091790
ER
PT J
AU Barrett, FJ
Peplowski, K
AF Barrett, FJ
Peplowski, K
TI Minimal structures within a song: An analysis of "All of me"
SO ORGANIZATION SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Jazz as a Metaphor for Organizing in the 21st Century at
the 1995 Academy-of-Management National Conference
CY 1995
CL VANCOUVER, CANADA
SP Acad Management
C1 USN, Postgrad Sch, Dept Syst Management, Monterey, CA 93941 USA.
RP Barrett, FJ (reprint author), USN, Postgrad Sch, Dept Syst Management, Monterey, CA 93941 USA.
NR 0
TC 14
Z9 14
U1 0
U2 4
PU INST OPERATIONS RESEARCH MANAGEMENT SCIENCES
PI LINTHICUM HTS
PA 901 ELKRIDGE LANDING RD, STE 400, LINTHICUM HTS, MD 21090-2909 USA
SN 1047-7039
J9 ORGAN SCI
JI Organ Sci.
PD SEP-OCT
PY 1998
VL 9
IS 5
BP 558
EP 560
DI 10.1287/orsc.9.5.558
PG 3
WC Management
SC Business & Economics
GA 133BF
UT WOS:000076666000005
ER
PT J
AU Barrett, FJ
AF Barrett, FJ
TI Creativity and improvisation in jazz and organizations: Implications for
organizational learning
SO ORGANIZATION SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Jazz as a Metaphor for Organizing in the 21st Century at
the 1995 Academy-of-Management National Conference
CY 1995
CL VANCOUVER, CANADA
SP Acad Management
C1 USN, Postgrad Sch, Dept Syst Management, Monterey, CA 93943 USA.
RP Barrett, FJ (reprint author), USN, Postgrad Sch, Dept Syst Management, Monterey, CA 93943 USA.
NR 63
TC 156
Z9 158
U1 4
U2 54
PU INST OPERATIONS RESEARCH MANAGEMENT SCIENCES
PI LINTHICUM HTS
PA 901 ELKRIDGE LANDING RD, STE 400, LINTHICUM HTS, MD 21090-2909 USA
SN 1047-7039
J9 ORGAN SCI
JI Organ Sci.
PD SEP-OCT
PY 1998
VL 9
IS 5
BP 605
EP 622
DI 10.1287/orsc.9.5.605
PG 18
WC Management
SC Business & Economics
GA 133BF
UT WOS:000076666000014
ER
PT J
AU Girgis, N
Sultan, Y
Frenck, RW
El-Gendy, A
Farid, Z
Mateczun, A
AF Girgis, N
Sultan, Y
Frenck, RW
El-Gendy, A
Farid, Z
Mateczun, A
TI Azithromycin compared with rifampin for eradication of nasopharyngeal
colonization by Neisseria meningitidis
SO PEDIATRIC INFECTIOUS DISEASE JOURNAL
LA English
DT Article
DE azithromycin; rifampin; Neisseria meningitidis
ID CIPROFLOXACIN
AB Objectives. To evaluate the efficacy and safety of azithromycin compared with rifampin for eradication of nasopharyngeal carriage of Neisseria meningitidis
Methods. Pharyngeal swabs were obtained from 500 students attending nursing school in Cairo, Egypt, to determine the colonization rate with N. meningitidis. Colonized individuals were randomized to receive azithromycin (500 mg once) or rifampin (600 mg twice daily for four doses). Subjects were then recultured 1 and 2 weeks posttreatment to determine the effectiveness of the antibiotic therapy for eradication of meningococcal nasopharyngeal colonization.
Results, Individuals treated with azithromycin had a 93% eradication rate at 1 and 2 weeks posttreatment comparable with 95 and 91%, respectively, for rifampin. No significant side effects were reported by any subjects treated with either antibiotic.
Conclusion. Azithromycin is effective in the eradication of N, meningitidis from the nasopharynx of asymptomatic colonized individuals and deserves further evaluation for use as prophylaxis against N, meningitidis.
C1 USN, Med Res Unit 3, Clin Invest Branch, FPO, AE 09835 USA.
Abbassia Fever Hosp, Cairo, Egypt.
RP Girgis, N (reprint author), USN, Med Res Unit 3, Clin Invest Branch, PSC 452,Box 5000, FPO, AE 09835 USA.
NR 19
TC 37
Z9 39
U1 0
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 USA
SN 0891-3668
J9 PEDIATR INFECT DIS J
JI Pediatr. Infect. Dis. J.
PD SEP
PY 1998
VL 17
IS 9
BP 816
EP 819
DI 10.1097/00006454-199809000-00013
PG 4
WC Immunology; Infectious Diseases; Pediatrics
SC Immunology; Infectious Diseases; Pediatrics
GA 126ER
UT WOS:000076280400010
PM 9779768
ER
PT J
AU Clapp, CR
Wheeler, DS
Ponaman, ML
McEachren, H
Poss, WB
AF Clapp, CR
Wheeler, DS
Ponaman, ML
McEachren, H
Poss, WB
TI Isoflurane therapy for status asthmaticus in children.
SO PEDIATRICS
LA English
DT Meeting Abstract
C1 USN, Med Ctr, Dept Pediat, San Diego, CA 92152 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER ACAD PEDIATRICS
PI ELK GROVE VILLAGE
PA 141 NORTH-WEST POINT BLVD,, ELK GROVE VILLAGE, IL 60007-1098 USA
SN 0031-4005
J9 PEDIATRICS
JI Pediatrics
PD SEP
PY 1998
VL 102
IS 3
SU 1
BP 705
EP 705
PG 1
WC Pediatrics
SC Pediatrics
GA 117YM
UT WOS:000075810500078
ER
PT J
AU Brown, CVR
Canty, TG
Canty, TG
AF Brown, CVR
Canty, TG
Canty, TG
TI Injury of the GI tract from child abuse
SO PEDIATRICS
LA English
DT Meeting Abstract
C1 Univ Washington, Seattle, WA 98195 USA.
Childrens Hosp, San Diego, CA USA.
USN, Ctr Med, San Diego, CA 92152 USA.
NR 0
TC 1
Z9 1
U1 0
U2 0
PU AMER ACAD PEDIATRICS
PI ELK GROVE VILLAGE
PA 141 NORTH-WEST POINT BLVD,, ELK GROVE VILLAGE, IL 60007-1098 USA
SN 0031-4005
J9 PEDIATRICS
JI Pediatrics
PD SEP
PY 1998
VL 102
IS 3
SU 1
BP 803
EP 803
PG 1
WC Pediatrics
SC Pediatrics
GA 117YM
UT WOS:000075810500309
ER
PT J
AU Poss, WB
Fazio, RF
Wheeler, DS
AF Poss, WB
Fazio, RF
Wheeler, DS
TI Resident training in pediatric critical care transport medicine.
SO PEDIATRICS
LA English
DT Meeting Abstract
C1 USN, Med Ctr, Dept Pediat, San Diego, CA 92152 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER ACAD PEDIATRICS
PI ELK GROVE VILLAGE
PA 141 NORTH-WEST POINT BLVD,, ELK GROVE VILLAGE, IL 60007-1098 USA
SN 0031-4005
J9 PEDIATRICS
JI Pediatrics
PD SEP
PY 1998
VL 102
IS 3
SU 1
BP 817
EP 817
PG 1
WC Pediatrics
SC Pediatrics
GA 117YM
UT WOS:000075810500350
ER
PT J
AU Chien, CH
Blaisten-Barojas, E
Pederson, MR
AF Chien, CH
Blaisten-Barojas, E
Pederson, MR
TI Magnetic and electronic properties of rhodium clusters
SO PHYSICAL REVIEW A
LA English
DT Article
ID GENERALIZED GRADIENT APPROXIMATION; DENSITY-FUNCTIONAL THEORY;
METAL-CLUSTERS; STATES; DIMERS; RH; SURFACES; 1ST
AB We have used all-electron local (LDA) and nonlocal (GGA) approximations to the density-functional theory to determine binding energies, equilibrium geometries, vibrational frequencies, and magnetic properties of Rh, clusters (N less than or equal to 6). We present careful tests on the Rh-2 dimer that compare results as calculated with a large (18-single Gaussian) and a very large (23-single Gaussian) basis sets. While the smaller set of Gaussians leads to underconverged results, we find that the large basis set leads to converged results that are also in excellent agreement with the experimental data available for Rh,. The ground state of Ph-2 is confirmed to be a quintuplet, the trigonal Rh-2 is predicted to be a sextuplet, Ri(4) in its tetrahedral configuration is a singlet, Rh-5 sextuplet is a square pyramid, and Rh-6 septuplet is the octahedron. Results from several excited states are calculated and presented as well. It is found that LDA overestimates the binding energy but that GGA corrects this deficiency and predicts longer bond lengths.
C1 George Mason Univ, Inst Computat Sci & Informat, Fairfax, VA 22030 USA.
USN, Res Lab, Complex Syst Theory Branch, Washington, DC 20375 USA.
RP Chien, CH (reprint author), George Mason Univ, Inst Computat Sci & Informat, Fairfax, VA 22030 USA.
EM eblaiste@gmu.edu
RI Blaisten-Barojas, Estela/B-9520-2009
NR 27
TC 63
Z9 64
U1 0
U2 4
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 SEP
PY 1998
VL 58
IS 3
BP 2196
EP 2202
DI 10.1103/PhysRevA.58.2196
PG 7
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 116MY
UT WOS:000075730200072
ER
PT J
AU Kirkpatrick, SM
Yang, HS
Dennis, WM
AF Kirkpatrick, SM
Yang, HS
Dennis, WM
TI Picosecond acoustic phonon dynamics in LaF3 : Pr3+
SO PHYSICAL REVIEW B
LA English
DT Article
ID NONEQUILIBRIUM PHONONS; GENERATION; RADIATION
AB A plasma switching technique is used to generate subnanosecond, far-infrared (FIR) pulses with frequency 113 cm(-1). The generation of subnanosecond FIR pulses enables us to improve the time resolution of phonon spectroscopic measurements from 50 ns to 350 ps. As an application of this technique, we investigate the subnanosecond dynamics of high-frequency phonons in 0.5% LaF3:Pr3+. In particular, we report on the generation and detection of a subnanosecond nonequilibrium phonon population at 113 cm(-1), and the temporal evolution of the resulting decay products. The frequency dependence of the phonon relaxation rates of acoustic phonons in this material is found to deviate from the omega(5) frequency dependence predicted by an isotropic model with linear dispersion. A more realistic model based on the actual dispersion curves of the material is presented and compared with the data.
C1 Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA.
RP Kirkpatrick, SM (reprint author), USN, Res Lab, Laser Phys Branch, Code 5640, Washington, DC 20375 USA.
NR 16
TC 2
Z9 2
U1 1
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD SEP 1
PY 1998
VL 58
IS 9
BP 5417
EP 5422
DI 10.1103/PhysRevB.58.5417
PG 6
WC Physics, Condensed Matter
SC Physics
GA 116JA
UT WOS:000075720100049
ER
PT J
AU Pederson, MR
Reuse, F
Khanna, SN
AF Pederson, MR
Reuse, F
Khanna, SN
TI Magnetic transition in Mn-n (n=2-8) clusters
SO PHYSICAL REVIEW B
LA English
DT Article
ID GENERALIZED GRADIENT APPROXIMATION; LOCAL-SPIN-DENSITY; RESONANCE; GAS
AB Theoretical electronic structure studies on Mn-n (n = 2-8) clusters have been carried out using a linear-combination-of-atomic-orbitals-molecular-orbital approach within the density-functional formalism. It is shown that Mn-2 and Mn-3 have energetically close ferromagnetic and antiferromagnetic or frustrated antiferromagnetic solutions. Mn-4, Mn-5, Mn-6, Mn-7, and Mn-8 are all ferromagnetic with moments of 20, 23, 26, 29, and 32 mu(B). The appearance of ferromagnetic character is shown to be accompanied by bending between minority d states; The relation between geometry and multiplicity and the possibility of closely spaced multiplet states are discussed.
C1 USN, Res Lab, Complex Syst Theory Branch 6692, Washington, DC 20375 USA.
Ecole Polytech Fed Lausanne, Inst Phys Expt, PHB Ecublens, CH-1015 Lausanne, Switzerland.
Virginia Commonwealth Univ, Dept Phys, Richmond, VA 23284 USA.
RP USN, Res Lab, Complex Syst Theory Branch 6692, Washington, DC 20375 USA.
NR 26
TC 119
Z9 120
U1 1
U2 5
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 SEP 1
PY 1998
VL 58
IS 9
BP 5632
EP 5636
DI 10.1103/PhysRevB.58.5632
PG 5
WC Physics, Condensed Matter
SC Physics
GA 116JA
UT WOS:000075720100076
ER
PT J
AU Rudd, RE
Broughton, JQ
AF Rudd, RE
Broughton, JQ
TI Coarse-grained molecular dynamics and the atomic limit of finite
elements
SO PHYSICAL REVIEW B
LA English
DT Article
ID SIMULATION
AB We develop a technique for simulation of the mechanics of micron-scale solid systems: coarse-grained molecular dynamics (CGMD). It captures the important atomistic effects without the computational cost of conventional molecular dynamics (MD). The CGMD equations of motion are derived directly from finite temperature MD through a statistical coarse graining procedure. so they agree with MD as the mesh size is reduced to the atomic scale. This allows a seamless coupling of length scales. The use of efficient CGMD in peripheral regions extends atomistic simulation to much larger systems than amenable to MD alone.
C1 USN, Res Lab, Complex Syst Theory Branch, Washington, DC 20375 USA.
RP Rudd, RE (reprint author), USN, Res Lab, Complex Syst Theory Branch, Washington, DC 20375 USA.
EM rudd@dave.nrl.navy.mil; broughto@dave.nrl.navy.mil
OI Rudd, Robert/0000-0002-6632-2681
NR 9
TC 159
Z9 164
U1 4
U2 27
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 SEP 1
PY 1998
VL 58
IS 10
BP R5893
EP R5896
DI 10.1103/PhysRevB.58.R5893
PG 4
WC Physics, Condensed Matter
SC Physics
GA 121HN
UT WOS:000076007600002
ER
PT J
AU Krushelnick, K
Moore, CI
Ting, A
Burris, HR
AF Krushelnick, K
Moore, CI
Ting, A
Burris, HR
TI Frequency mixing of high intensity laser light with stimulated Raman
backscattered radiation in underdense plasmas
SO PHYSICAL REVIEW E
LA English
DT Article
ID 2ND-HARMONIC GENERATION; EMISSION; FILAMENTATION; SCATTERING; PULSE
AB Sidescattered radiation from the interaction of an ultraintense laser pulse (P>2 TW) with underdense helium plasmas (n(e)approximate to 10(19) cm(-3)) is measured and emission at 90 degrees from the axis of laser propagation is observed to be broadened significantly near the second harmonic (Delta lambda=30-40 nm). This result is consistent with sum frequency mixing of forward propagating laser light and the broadened backscattered stimulated Raman scattered radiation that occurs within transient filamentary structures produced by the ponderomotive force of the focused laser pulse.
C1 Cornell Univ, Plasma Studies Lab, Ithaca, NY 14853 USA.
Omega P Inc, New Haven, CT 06520 USA.
USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Krushelnick, K (reprint author), Cornell Univ, Plasma Studies Lab, Ithaca, NY 14853 USA.
NR 15
TC 3
Z9 3
U1 0
U2 2
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1063-651X
J9 PHYS REV E
JI Phys. Rev. E
PD SEP
PY 1998
VL 58
IS 3
BP 4030
EP 4032
DI 10.1103/PhysRevE.58.4030
PN B
PG 3
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 121HM
UT WOS:000076007400094
ER
PT J
AU Smith, GB
Leighton, RI
Tang, ST
AF Smith, GB
Leighton, RI
Tang, ST
TI Turbulent transition in the infrared
SO PHYSICS OF FLUIDS
LA English
DT Article; Proceedings Paper
CT 15th Annual Fluid Mechanics Photo Contest at the Meeting of the
American-Physical-Society-Division-of-Fluid-Dynamics
CY NOV, 1997
CL SAN FRANCISCO, CALIFORNIA
SP Amer Phys Soc, Div Fluid Dynam
C1 USN, Res Lab, Washington, DC 20375 USA.
Univ Delaware, Newark, DE 19716 USA.
RP Smith, GB (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 0
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
USA
SN 1070-6631
J9 PHYS FLUIDS
JI Phys. Fluids
PD SEP
PY 1998
VL 10
IS 9
BP S9
EP S9
PG 1
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 114JA
UT WOS:000075604300009
ER
PT J
AU Velikovich, AL
Cochran, FL
Davis, J
Chong, YK
AF Velikovich, AL
Cochran, FL
Davis, J
Chong, YK
TI Stabilized radiative Z-pinch loads with tailored density profiles
SO PHYSICS OF PLASMAS
LA English
DT Article
ID RAYLEIGH-TAYLOR INSTABILITY; RICHTMYER-MESHKOV INSTABILITY; SUPPRESSION;
CURVATURE; FRONTS; GROWTH; WAVES; GAS
AB Mitigation of the Rayleigh-Taylor (RT) instability of Z-pinch;loads imploded from large initial radii through tailoring initial load density profiles in radial and axial directions is studied numerically. These methods could be helpful for a variety of applications of high-power Z-pinches, from producing large amounts of K-shell radiation to imploding inertial confinement fusion pellets. Radial density tailoring is demonstrated to delay the onset of the RT instability development at the expense of reducing the energy available for conversion into radiation. Axial density tailoring can fully stabilize acceleration of a fraction of the initial load mass. For a better tradeoff between stability and radiative performance of the loads, the density profiles could be tailored in two dimensions, combining the advantages of both methods. Post-processing of the radiation-magnetohydrodynamic simulation results demonstrates that an appreciable K-shell argon radiation power could be generated with a stabilized argon load imploded by a 5 MA current from a similar to 10 cm initial radius in about 0.5 mu s. (C) 1998 American Institute of Physics. [S1070-664X(98)03809-9]
C1 Berkeley Res Assoc Inc, Springfield, VA 22150 USA.
USN, Res Lab, Div Plasma Phys, Radiat Hydrodynam Branch, Washington, DC 20375 USA.
RP Velikovich, AL (reprint author), Berkeley Res Assoc Inc, Springfield, VA 22150 USA.
RI Velikovich, Alexander/B-1113-2009
NR 49
TC 28
Z9 29
U1 0
U2 2
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD SEP
PY 1998
VL 5
IS 9
BP 3377
EP 3388
DI 10.1063/1.873063
PG 12
WC Physics, Fluids & Plasmas
SC Physics
GA 117KR
UT WOS:000075780900035
ER
PT J
AU Murrell, GL
Karakla, DW
Messa, A
AF Murrell, GL
Karakla, DW
Messa, A
TI Free flap repair of septal perforation
SO PLASTIC AND RECONSTRUCTIVE SURGERY
LA English
DT Article; Proceedings Paper
CT Autumn Meeting of the
Academy-of-Facial-Plastic-and-Reconstructive-Surgery
CY SEP 04-05, 1997
CL SAN FRANCISCO, CALIFORNIA
SP Acad Facial Plast & Reconstruct Surg
ID LARGE NASOSEPTAL PERFORATIONS; FOREARM FLAP; CLOSURE
C1 Natl Naval Med Ctr, Dept Otolaryngol Head & Neck Surg, Portsmouth, VA 23708 USA.
Natl Naval Med Ctr, Dept Plast Surg, Portsmouth, VA 23708 USA.
RP Murrell, GL (reprint author), Natl Naval Med Ctr, Dept Otolaryngol Head & Neck Surg, Portsmouth Code 0609, Portsmouth, VA 23708 USA.
NR 16
TC 11
Z9 11
U1 0
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 USA
SN 0032-1052
J9 PLAST RECONSTR SURG
JI Plast. Reconstr. Surg.
PD SEP
PY 1998
VL 102
IS 3
BP 818
EP 821
DI 10.1097/00006534-199809030-00029
PG 4
WC Surgery
SC Surgery
GA 114JM
UT WOS:000075605400029
PM 9727449
ER
PT J
AU Murphey, MD
Flemming, DJ
Boyea, SR
Bojescul, JA
Sweet, DE
Temple, HT
AF Murphey, MD
Flemming, DJ
Boyea, SR
Bojescul, JA
Sweet, DE
Temple, HT
TI Enchondroma versus chondrosarcoma in the appendicular skeleton:
Differentiating features
SO RADIOGRAPHICS
LA English
DT Article
DE bone neoplasms; bone neoplasms, diagnosis; enchondroma; sarcoma
ID MALIGNANT CARTILAGE TUMORS; BONE-LESIONS; MR; RADIOLOGY; BIOLOGY; GRADE;
RADIOGRAPHY; APPEARANCE; PATHOLOGY; DIAGNOSIS
AB Distinction of enchondroma versus intramedullary chondrosarcoma affecting the appendicular skeleton (proximal to the metacarpals and metatarsals) is a frequent diagnostic dilemma, The authors studied a large series of patients with these lesions (92 with enchondromas, 95 with chondrosarcomas) using statistical assessment of both clinical parameters and numerous radiologic manifestations on images from multiple modalities to identify differentiating features. Multiple clinical and imaging parameters demonstrated statistically significant differences between enchondroma and chondrosarcoma, particularly pain related to the lesion, deep endosteal scalloping (greater than two-thirds of cortical thickness), cortical destruction and soft-tissue mass (at computed tomography or magnetic resonance imaging), periosteal reaction (at radiography), and marked uptake of radionuclide (greater than the anterior iliac crest) at bone scintigraphy, All of these features strongly suggested the diagnosis of chondrosarcoma, These criteria allow distinction of appendicular enchondroma and chondrosarcoma in at least 90% of cases.
C1 Armed Forces Inst Pathol, Dept Radiol Pathol, Washington, DC 20306 USA.
Armed Forces Inst Pathol, Dept Orthoped Pathol, Washington, DC 20306 USA.
Uniformed Serv Univ Hlth Sci, Dept Radiol & Nucl Med, Bethesda, MD 20814 USA.
Uniformed Serv Univ Hlth Sci, Dept Surg, Bethesda, MD 20814 USA.
Univ Maryland, Sch Med, Dept Radiol, Baltimore, MD 21201 USA.
USN, Natl Med Ctr, Dept Radiol, Bethesda, MD USA.
Walter Reed Army Med Ctr, Dept Orthoped Surg, Washington, DC 20307 USA.
RP Murphey, MD (reprint author), Armed Forces Inst Pathol, Dept Radiol Pathol, Bldg 54,Rm M-121,16th & Alaska Sts NW, Washington, DC 20306 USA.
NR 45
TC 111
Z9 126
U1 1
U2 7
PU RADIOLOGICAL SOC NORTH AMER
PI EASTON
PA 20TH AND NORTHAMPTON STS, EASTON, PA 18042 USA
SN 0271-5333
J9 RADIOGRAPHICS
JI Radiographics
PD SEP-OCT
PY 1998
VL 18
IS 5
BP 1213
EP 1237
PG 25
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA 117BJ
UT WOS:000075759800017
PM 9747616
ER
PT J
AU Wilcox, JR
AF Wilcox, JR
TI The meaning of words
SO RADIOLOGY
LA English
DT Letter
C1 USN, Med Ctr, Dept Radiol, Portsmouth, VA 23708 USA.
RP Wilcox, JR (reprint author), USN, Med Ctr, Dept Radiol, 620 John Paul Jones Circle, Portsmouth, VA 23708 USA.
NR 2
TC 1
Z9 1
U1 0
U2 0
PU RADIOLOGICAL SOC NORTH AMER
PI EASTON
PA 20TH AND NORTHAMPTON STS, EASTON, PA 18042 USA
SN 0033-8419
J9 RADIOLOGY
JI Radiology
PD SEP
PY 1998
VL 208
IS 3
BP 829
EP 829
PG 1
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA 112HN
UT WOS:000075488200042
PM 9722867
ER
PT J
AU Sandidge, JC
Holyer, RJ
AF Sandidge, JC
Holyer, RJ
TI Coastal bathymetry from hyperspectral observations of water radiance
SO REMOTE SENSING OF ENVIRONMENT
LA English
DT Article
ID AVIRIS; IMAGERY
AB Water depth, bottom reflectance, inherent optical properties of the water column (scattering, absorption, and fluorescence), and illumination conditions combine to determine the upwelling spectral radiance of coastal waters. If these complex optical relationships could be quantified, it would be possible to extract coastal information from spectral radiance data. We use data from the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) in a neural network system to establish quantitative, empirical relationships between one of these parameters, depth, and remotely sensed spectral radiance. Data are analyzed for two areas: the western coast of Florida in the Tampa Bay area and the Florida Keys between Upper Matecumbe and Plantation Keys. The neural network approach results in retrieval of reasonable depths from spectral radiance in both cases over a depth range of 0 to 6 m. Retrieved depths for Tampa Bay are accurate to a RMS error of 0.84 m relative to depths in the National Ocean Survey (NOS) Hydrographic Database, and the Keys retrievals have an RMS error of 0.39 m relative to a bathymetric survey conducted to support this study. A neural network trained on a combination of the two data sets results in a combined RMS error of 0.48 m, nearly the same performance as neural networks trained individually. The ability of the neural network to generalize, producing algorithms with some degree of universality among diverse coastal environments is, thereby, demonstrated. The result of the generalization analysis is of practical importance because it indicates that the neural network may not require an extensive training set of water depth data in order to the "tuned" for each location where depth retrievals are desired. While empirical the neural network is in some sense a model of the inversion of the radiative transfer problem within the marine environment. The neural network approach, therefore, operates on a higher level than more traditional statistical curve fitting solutions for retrieval of remotely sensed information. Published by Elsevier Science Inc.
C1 USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Sandidge, JC (reprint author), USN, Res Lab, Code 7340,Bldg 1105,Rm F605G, Stennis Space Ctr, MS 39529 USA.
NR 17
TC 59
Z9 71
U1 2
U2 8
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 USA
SN 0034-4257
J9 REMOTE SENS ENVIRON
JI Remote Sens. Environ.
PD SEP
PY 1998
VL 65
IS 3
BP 341
EP 352
DI 10.1016/S0034-4257(98)00043-1
PG 12
WC Environmental Sciences; Remote Sensing; Imaging Science & Photographic
Technology
SC Environmental Sciences & Ecology; Remote Sensing; Imaging Science &
Photographic Technology
GA 112ZL
UT WOS:000075524700010
ER
PT J
AU Hisnanick, JJ
AF Hisnanick, JJ
TI Social policies for children.
SO REVIEW OF SOCIAL ECONOMY
LA English
DT Book Review
C1 Childrens Natl Med Ctr, Washington, DC 20010 USA.
USN Acad, Annapolis, MD 21402 USA.
RP Hisnanick, JJ (reprint author), Childrens Natl Med Ctr, Washington, DC 20010 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU ROUTLEDGE
PI LONDON
PA 11 NEW FETTER LANE, LONDON EC4P 4EE, ENGLAND
SN 0034-6764
J9 REV SOC ECON
JI Rev. Soc. Econ.
PD FAL
PY 1998
VL 56
IS 3
BP 386
EP 389
PG 4
WC Economics
SC Business & Economics
GA 126YH
UT WOS:000076322600013
ER
PT J
AU Smith, G
Volpano, D
AF Smith, G
Volpano, D
TI A sound polymorphic type system for a dialect of C
SO SCIENCE OF COMPUTER PROGRAMMING
LA English
DT Article; Proceedings Paper
CT 6th European Symposium on Programming (ESOP 96)
CY APR 22-26, 1996
CL LINKOPING, SWEDEN
DE C; type systems; polymorphism; variables; pointers; type soundness;
natural semantics; transition semantics
ID REFERENCES; VARIABLES
AB Advanced polymorphic type systems have come to play an important role in the world of functional programming. But, so far, these type systems have had little impact upon widely used imperative programming languages like C and C++. We show that ML-style polymorphism can be integrated smoothly into a dialect of C, which we call Polymorphic C. It has the same pointer operations as C, including the address-of operator &, the dereferencing operator *, and pointer arithmetic. We give a natural semantics for Polymorphic C, and prove a type soundness theorem that gives a rigorous and useful characterization of what can go wrong when a well-typed Polymorphic C program is executed. For example, a well-typed Polymorphic C program may fail to terminate, or it may abort due to a dangling pointer error. Proving such a type soundness theorem requires a notion of an attempted program execution; we show that a natural semantics gives rise quite naturally to a transition semantics, which we call a natural transition semantics, that models program execution in terms of transformations of partial derivation trees. This technique should be generally useful in proving type soundness theorems for languages defined using natural semantics. (C) 1998 Elsevier Science B.V. All rights reserved.
C1 Florida Int Univ, Sch Comp Sci, Miami, FL 33199 USA.
USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
RP Smith, G (reprint author), Florida Int Univ, Sch Comp Sci, Miami, FL 33199 USA.
NR 24
TC 10
Z9 10
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-6423
J9 SCI COMPUT PROGRAM
JI Sci. Comput. Program.
PD SEP
PY 1998
VL 32
IS 1-3
BP 49
EP 72
DI 10.1016/S0167-6423(97)00030-0
PG 24
WC Computer Science, Software Engineering
SC Computer Science
GA 113KM
UT WOS:000075550200003
ER
PT J
AU Kostoff, RN
AF Kostoff, RN
TI The use and misuse of citation analysis in research evaluation -
Comments on theories of citation?
SO SCIENTOMETRICS
LA English
DT Article
AB The present paper addresses some of the many possible uses of citations, including bookmark, intellectual heritage, impact tracker, and self-serving purposes. The main focus is on the applicability of citation analysis as an impact or quality measure. If a paper's bibliography is viewed as consisting of a directed (research impact or quality) component related to intellectual heritage and random components related to specific self-interest topics, then for large numbers of citations from many different citing papers, the most significant intellectual heritage (research impact or quality) citations will aggregate and the random author-specific self-serving citations will be scattered and not accumulate. However, there are at least two limitations to this model of citation analysis for stand-alone use as a measure of research impact or quality. First, the reference to intellectual heritage could be positive or negative. Second, there could be systemic biases which affect the aggregate results, and one of these, the "Pied Piper Effect", is described in detail. Finally, the results of a short citation study comparing Russian and American papers in different technical fields are presented. The questions raised in interpreting this data highlight a few of the difficulties in attempting to interpret citation results without supplementary information.
Leydesdorff (Leydesdorff, 1998) addresses the history of citations and citation analysis, and the transformation of a reference mechanism into a purportedly quantitative measure of research impact/quality. The present paper examines different facets of citations and citation analysis, and discusses the validity of citation analysis as a useful measure of research impact/quality.
C1 Off Naval Res, Arlington, VA 22217 USA.
RP Off Naval Res, 800 N Quincy St, Arlington, VA 22217 USA.
EM kostofr@onr.navy.mil
NR 11
TC 85
Z9 87
U1 4
U2 23
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0138-9130
EI 1588-2861
J9 SCIENTOMETRICS
JI Scientometrics
PD SEP
PY 1998
VL 43
IS 1
BP 27
EP 43
DI 10.1007/BF02458392
PG 17
WC Computer Science, Interdisciplinary Applications; Information Science &
Library Science
SC Computer Science; Information Science & Library Science
GA 119CL
UT WOS:000075877700003
ER
PT J
AU Arnone, RA
Gould, RW
AF Arnone, RA
Gould, RW
TI Coastal monitoring using ocean color
SO SEA TECHNOLOGY
LA English
DT Article
C1 USN, Res Lab, Ocean Color Sect, Stennis Space Ctr, MS 39529 USA.
RP Arnone, RA (reprint author), USN, Res Lab, Ocean Color Sect, Stennis Space Ctr, MS 39529 USA.
NR 0
TC 6
Z9 7
U1 1
U2 1
PU COMPASS PUBL INC
PI ARLINGTON
PA SUITE 1000 1117 N 19 ST, ARLINGTON, VA 22209 USA
SN 0093-3651
J9 SEA TECHNOL
JI Sea Technol.
PD SEP
PY 1998
VL 39
IS 9
BP 18
EP +
PG 9
WC Engineering, Ocean
SC Engineering
GA 121ZK
UT WOS:000076045800003
ER
PT J
AU Posch, TJ
Puckett, ML
AF Posch, TJ
Puckett, ML
TI Marrow MR signal abnormality associated with bilateral avulsive cortical
irregularities in a gymnast
SO SKELETAL RADIOLOGY
LA English
DT Article
DE marrow; MR signal; avulsive cortical irregularity
ID DISTAL FEMUR; DEFECTS
AB Abnormal marrow signal and marrow enhancement have not been described in association with benign avulsive cortical irregularity. We present the case of an 11-year-old gymnast with such findings that partially resolved over time. The marrow MR abnormalities are believed to represent an extension or spectrum of findings associated with avulsive cortical irregularity, and should not instantly suggest infection or malignancy, as has been previously indicated. Careful and close clinical and radiological follow-up is required to confirm its benign course.
C1 USN, Med Ctr, Dept Clin Invest, San Diego, CA 92134 USA.
USN, Med Ctr, Dept Radiol, San Diego, CA 92134 USA.
RP Posch, TJ (reprint author), USN, Med Ctr, Dept Clin Invest, 34800 Bob Wilson Dr, San Diego, CA 92134 USA.
NR 12
TC 8
Z9 8
U1 0
U2 0
PU SPRINGER VERLAG
PI NEW YORK
PA 175 FIFTH AVE, NEW YORK, NY 10010 USA
SN 0364-2348
J9 SKELETAL RADIOL
JI Skeletal Radiol.
PD SEP
PY 1998
VL 27
IS 9
BP 511
EP 514
PG 4
WC Orthopedics; Radiology, Nuclear Medicine & Medical Imaging
SC Orthopedics; Radiology, Nuclear Medicine & Medical Imaging
GA 128KU
UT WOS:000076405500007
PM 9809881
ER
PT J
AU Walters, RJ
Xapsos, MA
Cotal, HL
Messenger, SR
Summers, GP
Sharps, PR
Timmons, ML
AF Walters, RJ
Xapsos, MA
Cotal, HL
Messenger, SR
Summers, GP
Sharps, PR
Timmons, ML
TI Radiation response and injection annealing of P+N InGaP solar cells
SO SOLID-STATE ELECTRONICS
LA English
DT Article
ID PROTON IRRADIATION; ELECTRON; INP; RECOMBINATION; DAMAGE; DEGRADATION
AB The effects of 1 MeV electron and 3 MeV proton irradiation on single-junction p(+)n InGaP solar cells are studied. The cell radiation response is monitored through measurements of current vs voltage (both in the dark and under simulated solar light (1 syn, AM0)), quantum efficiency, and capacitance vs voltage. Analysis of the data is used to determine the basic mechanisms for the cell response. High current injection causes the irradiated cells to partially recover due to a reduction in the junction dark current, which induces recovery in the cell open circuit voltage. The degradation data measured under electron and proton irradiation are correlated in terms of displacement damage dose, from which a characteristic degradation curve for this cell technology is determined. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
C1 USN, Res Lab, Washington, DC 20375 USA.
SFA Inc, Largo, MD 20774 USA.
Univ Maryland Baltimore Cty, Baltimore, MD 21228 USA.
Res Triangle Inst, Res Triangle Pk, NC 27709 USA.
RP Walters, RJ (reprint author), USN, Res Lab, Code 6615, Washington, DC 20375 USA.
NR 23
TC 26
Z9 26
U1 0
U2 5
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-1101
J9 SOLID STATE ELECTRON
JI Solid-State Electron.
PD SEP
PY 1998
VL 42
IS 9
BP 1747
EP 1756
DI 10.1016/S0038-1101(98)00139-7
PG 10
WC Engineering, Electrical & Electronic; Physics, Applied; Physics,
Condensed Matter
SC Engineering; Physics
GA 123ZR
UT WOS:000076156200018
ER
PT J
AU Chisick, MC
Poindexter, FR
York, AK
AF Chisick, MC
Poindexter, FR
York, AK
TI Comparing tobacco use among incoming recruits and military personnel on
active duty in the United States
SO TOBACCO CONTROL
LA English
DT Article; Proceedings Paper
CT 18th Annual Scientific Session of the Society-of-Behavioral-Medicine
CY APR 16-19, 1997
CL SAN FRANCISCO, CALIFORNIA
SP Soc Behav Med
DE tobacco use; military personnel; United States
ID CIGARETTE-SMOKING
AB Objective-To compare the tobacco use profile of recruits with that of military personnel on active duty to determine whether the military environment in some way induces service members to initiate tobacco use.
Design and setting-Cross-sectional survey of United States armed forces active;duty and recruit personnel in 1994-95.
Subjects-2711 military recruits and 4603 military personnel on active duty.
Main outcome measures-Comparative cigarette smoking and smokeless tobacco use prevalence between recruits and personnel on active duty controlling for age, sex, and race. Impact of demographic factors on the odds of smoking or using smokeless tobacco.
Results-Increases in tobacco use in American military personnel occurred exclusively in men. The highest tobacco use resided with white men on active duty (43% cigarette smoking; 24% smokeless tobacco use) and represents a doubling of tobacco use seen among white male recruits. Among non-white men, tobacco use increased 2-4 times between recruits and personnel on active duty.
Conclusions Efforts to reduce tobacco use by American military personnel on active duty should focus more on discouraging the initiation of tobacco use.
C1 USA, Ctr Hlth Promot & Prevent Med, Aberdeen Proving Ground, MD USA.
USN, Res Inst Detachment, Bethesda, MD 20084 USA.
RP Chisick, MC (reprint author), 2422 Bibury Lane,apartment 203, Baltimore, MD 21244 USA.
NR 15
TC 30
Z9 30
U1 0
U2 1
PU BRITISH MED JOURNAL PUBL GROUP
PI LONDON
PA BRITISH MED ASSOC HOUSE, TAVISTOCK SQUARE, LONDON WC1H 9JR, ENGLAND
SN 0964-4563
J9 TOB CONTROL
JI Tob. Control
PD FAL
PY 1998
VL 7
IS 3
BP 236
EP 240
PG 5
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 161TR
UT WOS:000078306100015
PM 9825417
ER
PT J
AU Chanteau, S
Rabarijaona, L
O'Brien, T
Rahalison, L
Hager, J
Boisier, P
Burans, J
Rasolomaharo, M
AF Chanteau, S
Rabarijaona, L
O'Brien, T
Rahalison, L
Hager, J
Boisier, P
Burans, J
Rasolomaharo, M
TI F1 antigenaemia in bubonic plague patients, a marker of gravity and
efficacy of therapy
SO TRANSACTIONS OF THE ROYAL SOCIETY OF TROPICAL MEDICINE AND HYGIENE
LA English
DT Article
DE plague; Yersina pestis
ID LINKED-IMMUNOSORBENT-ASSAY; MADAGASCAR
C1 Inst Pasteur, Antananarivo, Malagasy Republ.
USN, Med Res Inst, Bethesda, MD 20814 USA.
Naval Med Res Unit 2, Jakarta, Indonesia.
Androva Hosp, Mahajanga, Malagasy Republ.
RP Chanteau, S (reprint author), Inst Pasteur, POB 1274, Antananarivo, Malagasy Republ.
RI BOISIER, PASCAL/A-2922-2009
NR 9
TC 19
Z9 20
U1 0
U2 1
PU ROYAL SOC TROPICAL MEDICINE
PI LONDON
PA MANSON HOUSE 26 PORTLAND PLACE, LONDON, ENGLAND W1N 4EY
SN 0035-9203
J9 T ROY SOC TROP MED H
JI Trans. Roy. Soc. Trop. Med. Hyg.
PD SEP-OCT
PY 1998
VL 92
IS 5
BP 572
EP 573
DI 10.1016/S0035-9203(98)90923-3
PG 2
WC Public, Environmental & Occupational Health; Tropical Medicine
SC Public, Environmental & Occupational Health; Tropical Medicine
GA 133LZ
UT WOS:000076689200032
PM 9861385
ER
PT J
AU Taylor, WF
Chen, S
Barshtein, G
Hyde, DE
Yedgar, S
AF Taylor, WF
Chen, S
Barshtein, G
Hyde, DE
Yedgar, S
TI Enhanced aggregability of human red blood cells by diving
SO UNDERSEA & HYPERBARIC MEDICINE
LA English
DT Article
DE hyperbaria; erythrocyte; peripheral circulation
ID COMPUTERIZED IMAGE-ANALYSIS; HYDROSTATIC-PRESSURE; AGGREGATION;
TRANSPORT; FLOW
AB In vitro studies have shown that mild pressure increases red blood cell (RBC) aggregation. Enhanced RBC aggregation in pathologic states can drive the circulation into stasis. This investigation examined the effects of pressure on RBC aggregation in human volunteers. The hypothesis tested is that RBC aggregation is increased during hyperbaric exposure. Eleven subjects participated in dives to 300 feet of seawater (fsw) in a man-rated chamber complex. Blood samples were taken at the surface, at 66 fsw, and at 300 fsw. Data were analyzed with a repeated measures one-way analysis of variance for a complete randomized design. Statistical significance was achieved at P < 0.05. Data are expressed as mean +/- SEM. The median aggregate size (number of RBC/aggregate) of RBCs was significantly increased at depth. At a shear stress of 0.1 dyne/cm(2), median aggregate size was 12.0 +/- 2.1, 33.0 +/- 7.3, and 48.8 +/- 10.8 at the surface, at 66 fsw, and at 300 fsw, respectively. These results show that mild pressure increases RBC aggregation in the human circulation.
C1 NIH, Natl Ctr Res Resources, Rockledge Ctr 1, Bethesda, MD 20892 USA.
USN, Med Res Inst, Diving & Environm Physiol Dept, Bethesda, MD 20889 USA.
Hebrew Univ Jerusalem, Hadassah Med Sch, Dept Biochem, IL-91120 Jerusalem, Israel.
RP Taylor, WF (reprint author), NIH, Natl Ctr Res Resources, Rockledge Ctr 1, Ste 6030,6705 Rockledge Dr,MSC 7965, Bethesda, MD 20892 USA.
NR 16
TC 7
Z9 7
U1 0
U2 1
PU UNDERSEA & HYPERBARIC MEDICAL SOC INC
PI KENSINGTON
PA 10531 METROPOLITAN AVE, KENSINGTON, MD 20895 USA
SN 1066-2936
J9 UNDERSEA HYPERBAR M
JI Undersea Hyperb. Med.
PD FAL
PY 1998
VL 25
IS 3
BP 167
EP 170
PG 4
WC Marine & Freshwater Biology; Medicine, Research & Experimental
SC Marine & Freshwater Biology; Research & Experimental Medicine
GA 125HJ
UT WOS:000076231100004
PM 9789336
ER
PT J
AU Pauley, PM
AF Pauley, PM
TI An example of uncertainty in sea level pressure reduction
SO WEATHER AND FORECASTING
LA English
DT Article
ID SURFACE; GRADIENT; TERRAIN
AB Difficulty analyzing mesoscale features in California and Nevada for a 1991 case study prompted a review of techniques for sea level pressure (SLP) reduction and an evaluation of the performance of the various techniques for the U.S. west coast states at 0000 UTC 30 November 1991. The objective of any SLP reduction procedure is to provide a pressure field that portrays meteorological features rather than terrain features, a difficult goal to meet in this region given the steep terrain gradients on the western slopes of the Sierra Nevada range. The review and evaluation are performed both for techniques applicable at individual stations and for techniques applicable at grid points in a model analysis or forecast.
When using station data, one would like to perform a manual or objective analysis of SLP with the greatest number of stations possible by adding stations that report only altimeter setting to the stations that report both SLP and altimeter setting. The results of the comparison show that the incorporation of altimeter-setting stations into an analysis of SLP was found to be practical only at elevations less than 300 m. Above this, the standard reduction includes empirical corrections that cannot be easily duplicated, and the other reduction techniques yielded values that varied over a large enough range that the uncertainty associated with the choice of technique becomes too great to permit the analysis of weak mesoscale features. At such low elevations, the various techniques examined gave similar results; therefore, the simple reduction is recommended. In elevated plateau regions, a pressure analysis on a geopotential surface at approximately the mean terrain height is recommended to minimize reduction errors. No satisfactory solution was found for regions with sleep terrain gradients.
Computing SLP from model objective analyses or forecasts that are in the model's native vertical coordinate, typically the terrain-following sigma coordinate, poses a different set of problems. The model terrain field is usually smoothed and so contains regions where it differs significantly from the actual terrain. This is sufficient in itself to yield reduction errors that have a coherent mesoscale signature. In addition, SLP fields computed using available techniques vary widely in areas of higher terrain elevation, sometimes producing mesoscale features that suspiciously coincide with terrain features and so suggest reduction error. These mesoscale pressure artifacts are also often associated with unrealistic geostrophic wind speed maxima. The Mesinger method of defining the below-ground temperature field by horizontal interpolation across terrain features after interpolating the model sigma-level objective analyses to pressure surfaces worked best for this case. It produced values that agreed reasonably well with the manual SLP analysis and with the 1300-m pressure analysis over Nevada, without generating an artificial geostrophic wind speed maximum.
C1 USN, Postgrad Sch, Dept Meteorol, Monterey, CA 93943 USA.
RP Pauley, PM (reprint author), USN, Postgrad Sch, Dept Meteorol, Code MR-Pa,589 Dyer Rd,Room 254, Monterey, CA 93943 USA.
NR 16
TC 20
Z9 20
U1 0
U2 1
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0882-8156
J9 WEATHER FORECAST
JI Weather Forecast.
PD SEP
PY 1998
VL 13
IS 3
BP 833
EP 850
DI 10.1175/1520-0434(1998)013<0833:AEOUIS>2.0.CO;2
PN 2
PG 18
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 130HD
UT WOS:000076513400017
ER
PT J
AU Bakaltcheva, IB
Shriver-Lake, LC
Ligler, FS
AF Bakaltcheva, IB
Shriver-Lake, LC
Ligler, FS
TI A fiber optic biosensor for multianalyte detection: importance of
preventing fluorophore aggregation
SO SENSORS AND ACTUATORS B-CHEMICAL
LA English
DT Article; Proceedings Paper
CT 4th European Conference on Optical Chemical Sensors and Biosensors
CY MAR 29-APR 01, 1998
CL MUNSTER, GERMANY
DE fiber optics; biosensor; immunosensor; deoxycholic acid; TNT; RDX
ID TNT
AB Individual assays for the detection of the explosives hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) and 2,4,6,-trinitrotoluene (TNT) with a fiber optic biosensor have been developed in our laboratory. The next step is to develop an assay for simultaneous detection of RDX and TNT, To obtain this goal, a mixture of the fluorescently-labeled analogs Cy5-EDA-RDH and Cy5-EDA-TNB used in the individual assays is run over anti-RDX and anti-TNT fiber probes connected in series. There is an increased total fluorophore concentration in the mixture which results in a significant increase in the normalized signal compared to that produced by a single fluorophore. Aggregation of the amphiphilic fluorophores in the mixture on the surface of the fiber optic probe is a possible reason for the observed effect. We explored the use of nonionic (Tween 20) and ionic detergents (deoxycholic acid) to block aggregate formation and allow analytical determination of RDX and TNT. Conditions are reported under which this is possible. (C) 1998 Elsevier Science S,A. All rights reserved.
C1 USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
Geocenters Inc, Rockville, MD 20852 USA.
RP Ligler, FS (reprint author), USN, Res Lab, Ctr Biomol Sci & Engn, Code 6910,4855 Overlook Ave, Washington, DC 20375 USA.
NR 12
TC 16
Z9 18
U1 1
U2 4
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 AUG 31
PY 1998
VL 51
IS 1-3
BP 46
EP 51
DI 10.1016/S0925-4005(98)00210-X
PG 6
WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
SC Chemistry; Electrochemistry; Instruments & Instrumentation
GA 156WD
UT WOS:000078024400007
ER
PT J
AU Roberts, M
Lindsay, GA
Stenger-Smith, JD
Hollins, RA
Chafin, AP
Gratz, RF
AF Roberts, M
Lindsay, GA
Stenger-Smith, JD
Hollins, RA
Chafin, AP
Gratz, RF
TI High glass transition temperature syndioregic second-order non-linear
optical polymer in Langmuir-Blodgett-Kuhn films
SO THIN SOLID FILMS
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Organized Molecular Films
CY AUG 24-29, 1997
CL PACIFIC GROVE, CALIFORNIA
SP Stanford Univ, Ctr Polymer Interfaces & Macromolec Assemblies, Thin Solid Films, NIH
DE multilayers; polymers; second-harmonic generation;
Langmuir-Blodgett-Kuhn; structural aging
ID 2ND-HARMONIC GENERATION
AB We report here recent progress toward the goal of processing polymers near room temperature to produce all-polymeric non-linear optical films which may ultimately find application as active waveguides. Polymers designed for spin-casting were found to be processable by the Langmuir-Blodgett-Kuhn (LBK) technique. The T-g of the bulk polymer is about 240 degrees C. The temporal stability of non-centrosymmetric order in LBK films at elevated temperatures was followed by measurement of the second harmonic generated (SHG) light intensity. The SHG signal was found to be constant in LBK films heated at 95 degrees C for 10 h. (C) 1998 Elsevier Science S.A. All rights reserved.
C1 USN, NAWCWPNS, China Lake, CA 93555 USA.
Mary Washington Coll, Dept Chem, Fredericksburg, VA 22401 USA.
RP Roberts, M (reprint author), USN, NAWCWPNS, Code 4B2200D, China Lake, CA 93555 USA.
NR 5
TC 3
Z9 3
U1 0
U2 0
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD AUG 31
PY 1998
VL 327
BP 5
EP 8
DI 10.1016/S0040-6090(98)00576-8
PG 4
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 124MX
UT WOS:000076187000003
ER
PT J
AU Kim, OK
Choi, LS
Zhang, HY
He, XH
Shih, YH
AF Kim, OK
Choi, LS
Zhang, HY
He, XH
Shih, YH
TI A novel supramolecular self-assembly thin film with spontaneous polar
order
SO THIN SOLID FILMS
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Organized Molecular Films
CY AUG 24-29, 1997
CL PACIFIC GROVE, CALIFORNIA
SP Stanford Univ, Ctr Polymer Interfaces & Macromolec Assemblies, Thin Solid Films, NIH
DE self-assembly; polar order; supramolecules; non-linear optical materials
ID LANGMUIR-BLODGETT-FILMS; 2ND HARMONIC-GENERATION; 2ND-HARMONIC
GENERATION; HEMICYANINE DYES; AMYLOSE
AB A novel supramolecular thin film in which a non-linear optical (NLO) chromophore is uniaxially included in the helical cavity of amylose, revealed a spontaneous self-assembly with a long-range polar order of the chromophores perpendicular to the film surface. This was manifested by a significantly large second harmonic generation (SHG) observed from solution-cast solid supramolecular thin films on a glass substrate without any external field. Such self-assembly/self-poling and the long-term polar stability of the supramolecular chromophores are thought to be due to the helical rigid-rod structure, their dipolar and/or chiral recognition in the ordering process following the polar initiation through the interface interaction of the chromophore with the glass substrate, and H-bonding among the ordered supramolecules. (C) 1998 Elsevier Science S.A. All rights reserved.
C1 USN, Res Lab, Div Chem, Washington, DC 20375 USA.
Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21228 USA.
RP Kim, OK (reprint author), USN, Res Lab, Div Chem, Washington, DC 20375 USA.
NR 16
TC 11
Z9 11
U1 0
U2 7
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD AUG 31
PY 1998
VL 327
BP 172
EP 175
DI 10.1016/S0040-6090(98)00622-1
PG 4
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 124MX
UT WOS:000076187000039
ER
PT J
AU Daehler, M
Bevilacqua, RM
Kriebel-Hamilton, DL
Goldizen, D
Olivero, JJ
Hartmann, GK
Degenhardt, W
Richards, ML
Connor, BJ
Aellig, CP
AF Daehler, M
Bevilacqua, RM
Kriebel-Hamilton, DL
Goldizen, D
Olivero, JJ
Hartmann, GK
Degenhardt, W
Richards, ML
Connor, BJ
Aellig, CP
TI Validation of millimeter-wave atmospheric sounder (MAS) ozone
measurements
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID ERROR ANALYSIS; SPACE; UARS; SPECTROSCOPY; INSTRUMENT; RETRIEVAL;
SHUTTLE; MIDDLE; CLO; O-3
AB This paper discusses the validation of measurements of O-3 distribution in the Earth's atmosphere made by the Millimeter-wave Atmospheric Sounder (MAS), a component of NASA's ATLAS spacelab shuttle package. Measurements of 184 GHz O-3 emission from the Earth's limb at tangent altitudes between 20 and 80 km were made with a 50 channel radiometer having a spectral resolution of 200 KHz. In three missions the emissions of O-3, H2O: ClO, and O-2 were measured between 70 degrees S and 70 degrees N latitudes. O-3 mixing ratio calculations and error analysis were performed with the Rodgers optimal estimation method. Data binned in 128 s batches yield mixing ratio profiles with an altitude resolution of 7 km at the O-3 peak and an estimated accuracy of 5%. Additional retrievals made with all data from each mission binned in 50 latitude zones yield mixing ratios with about 5 km altitude resolution and somewhat improved accuracy. Comparisons with coincident measurements from other space platforms indicate a general agreement within approximately 5%. The data are publicly available through the German Remote Sensing Data Center.
C1 USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
Computat Phys Inc, Fairfax, VA 22031 USA.
USAF, Wright Patterson AFB, OH 45433 USA.
Embry Riddle Aeronaut Univ, Dept Phys Sci, Daytona Beach, FL 32114 USA.
Max Planck Inst Aeron, D-37189 Katlenburg Lindau, Germany.
Natl Inst Water & Atmospher Res, Omakau, Cent Otago, New Zealand.
RP Daehler, M (reprint author), USN, Res Lab, Remote Sensing Div, 4555 Overlook Ave SW,Code 7227, Washington, DC 20375 USA.
EM daehler@rira.nrl.navy.mil; bevilacqu@map.nrl.navy;
kriebel@kepler.cpi.com; dgoldize@afit.af.mil; oliveroj@db.erau.edu;
ghartmann@linax1.dnet.gwdg.de; degenhardt@linax1.dnet.gwdg.de;
richards@linax1.dnet.gwdg.de; connor@kea.lauder.cri.nz
NR 25
TC 3
Z9 3
U1 0
U2 0
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 AUG 27
PY 1998
VL 103
IS D16
BP 19615
EP 19639
DI 10.1029/98JD01455
PG 25
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 114ED
UT WOS:000075595400015
ER
PT J
AU Ranganathan, D
Haridas, V
Kurur, S
Thomas, A
Madhusudanan, KP
Nagaraj, R
Kunwar, AC
Sarma, AVS
Karle, IL
AF Ranganathan, D
Haridas, V
Kurur, S
Thomas, A
Madhusudanan, KP
Nagaraj, R
Kunwar, AC
Sarma, AVS
Karle, IL
TI Demonstration of endo-cis-(2S,3R)-bicyclo[2.2.1]hept-5-en-2,3-dicarbonyl
unit as a reverse-turn scaffold and nucleator of two-stranded parallel
beta-sheets: Design, synthesis, crystal structure, and self-assembling
properties of norborneno peptide analogues
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Review
ID SECONDARY STRUCTURE MIMETICS; DE-NOVO DESIGN; PEPTIDOMIMETIC INHIBITORS;
SOLUTION CONFORMATIONS; CHEMICAL SYNTHESIS; IMPROVED TRANSPORT; LOCAL
STRUCTURES; PROTEIN DESIGN; DENOVO DESIGN; ALPHA-HELICES
AB endo-cis-(2S,3R)-Bicyclo[2.2.1]hept-5-en (norbornene) dicarbonyl unit with a built-in U-architecture has been demonstrated to be an excellent reverse-turn molecular scaffold. A large variety of endo-cis-(2S,3R)-norborneno bispeptides containing almost all of the coded amino acids were synthesized and examined for conformational preferences by H-1 NMR, FT-IR, CD, and X-ray crystallographic studies. While FT-IR and H-1 NMR variable-temperature studies ruled out the presence of any significant amount of intramolecular hydrogen bonding in simple bispeptides (3a-h) (except in Aib bispeptide), the CD studies were clearly in favor of a beta-turn type structure. Single-crystal X-ray studies on Aib, Val and Leu containing norborneno bispeptides (3b-d) provided convincing proof for the presence of reverse-turn conformation. While the interstrand C-alpha-C-alpha' distances (5.2-5.7 Angstrom) were well within the range of those for beta-turn structures, no interstrand intramolecular hydrogen bonding was seen in Val and Leu bispeptides; the Aib bispeptide forms a seven-membered hydrogen-bonded ring, thus, showing that the norbornene (2S,3R)-dicarbonyl template assembles peptide chains in reverse-turn conformation by virtue of its built-in U-shaped architecture at these positions, and hydrogen bonding may not be necessary to stabilize the turn structure. The endo-cis-(2S,3R) orientation of bispeptide chains is essential for turn structure as shown by the crystal structure of trans-(2R, 3R) and trans-(2S,3S) derivative of Val bispeptide wherein the two peptide chains move away from each other with the C-alpha-C-alpha' distance increasing to 7.1-8.2 Angstrom. The norbornene 5,6-double bond was hydrogenated to 5,6-dihydro derivative which showed almost the same CD spectrum as its olefinic analogue. Oxidative cleavage [Ru (VIII)] of the 5,6-double bond in norborneno bispeptides, as demonstrated with Leu bispeptide, afforded novel cyclopentanoid peptide analogues. The promise of norbornene unit as a template for nucleating the formation of two-stranded parallel beta-sheets with minimum structural complexity is shown by the preparation of higher members of norborneno bispeptides with the general structure NBE(Pep)(2) [NBE = endo-cis-(2S,3R)-bicyclo[2.2.1]hept-5-en (norbornene) dicarbonyl unit; Pep = peptide strand with two, three, or four (same or different) amino acid residues]. In H-1 NMR, the high (3)J(HN alpha) values (7.0-9.3 Hz) observed for the amide protons (Table 5) coupled with the presence of medium to strong intrastrand sequential ROE connectivities d(alpha N(i,i+1)) spanning the entire three- or four-residue sequence in the peptide strands of 9a-e and 10 and the exhibition of relatively low-temperature coefficients (d delta/dT = -0.2 to -3.4 ppb/K) for amide protons in DMSO-d(6) solvent (Table 4) clearly suggested that hydrogen-bonded beta-sheet conformers dominate the population. FT-IR and CD studies provided further support for parallel beta-sheet structures. A particularly unique feature of the norborneno bispeptides is their strong tendency to self-assemble in the solid state.
Thus, while endo-cis-(2S,3R)-Aib bispeptide (3b) forms 16-membered hydrogen bonded centrosymmetric dimers, the half-ester half-acid and the dicarboxylic acid derivatives of 3b self-assemble to form highly ordered hydrogen-bonded molecular ribbons. The Val and Leu cis-(2S, 3R)-bispeptides organize into hydrogen-bonded chains and the trans isomer of Val bispeptide self-assembles into hydrogen-bonded beta-sheet ribbon.
C1 CSIR, Reg Res Lab, Biomol Res Unit, Trivandrum 695019, Kerala, India.
Cent Drug Res Inst, Lucknow 226001, Uttar Pradesh, India.
Ctr Cellular & Mol Biol, Hyderabad 500007, Andhra Pradesh, India.
Indian Inst Chem Technol, Hyderabad 500007, Andhra Pradesh, India.
USN, Res Lab, Struct Matter Lab, Washington, DC 20375 USA.
RP Ranganathan, D (reprint author), CSIR, Reg Res Lab, Biomol Res Unit, Trivandrum 695019, Kerala, India.
RI V, haridas/K-2992-2012; TVM, NIIST/E-5132-2012
OI TVM, NIIST/0000-0002-5814-466X
NR 106
TC 51
Z9 51
U1 1
U2 6
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD AUG 26
PY 1998
VL 120
IS 33
BP 8448
EP 8460
DI 10.1021/ja980143+
PG 13
WC Chemistry, Multidisciplinary
SC Chemistry
GA 114PX
UT WOS:000075618900018
ER
PT J
AU Efros, AL
Rosen, M
AF Efros, AL
Rosen, M
TI Comment on "Comparison of the k center dot p and the direct
diagonalization approaches for describing the electron structure of
quantum dots"
SO APPLIED PHYSICS LETTERS
LA English
DT Editorial Material
ID ASSIGNMENT; SPECTRUM
C1 USN, Nanostruct Opt Sect, Res Lab, Washington, DC 20375 USA.
RP Efros, AL (reprint author), USN, Nanostruct Opt Sect, Res Lab, Washington, DC 20375 USA.
NR 14
TC 15
Z9 15
U1 1
U2 5
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD AUG 24
PY 1998
VL 73
IS 8
BP 1155
EP 1156
DI 10.1063/1.122114
PG 2
WC Physics, Applied
SC Physics
GA 113UN
UT WOS:000075572000047
ER
PT J
AU Bollt, EM
Kostelich, EJ
AF Bollt, EM
Kostelich, EJ
TI Optimal targeting of chaos
SO PHYSICS LETTERS A
LA English
DT Article
ID PERIODIC-ORBITS; SYSTEMS; ATTRACTORS
AB Standard graph theoretic algorithms are applied to chaotic dynamical systems to identify orbits that are optimal relative to a prespecified cost function. We reduce the targeting problem to the problem of finding optimal paths through a graph. Numerical experiments on one-dimensional maps suggest that periodic saddle orbits of low period are typically less expensive to target (relative to a family of smooth cost functions) than periodic saddle orbits of high period. (C) 1998 Elsevier Science B.V.
C1 USN Acad, Dept Math, Annapolis, MD 21402 USA.
Arizona State Univ, Dept Math, Tempe, AZ 85287 USA.
RP Bollt, EM (reprint author), USN Acad, Dept Math, 572 Holloway Rd, Annapolis, MD 21402 USA.
NR 22
TC 22
Z9 22
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9601
J9 PHYS LETT A
JI Phys. Lett. A
PD AUG 24
PY 1998
VL 245
IS 5
BP 399
EP 406
DI 10.1016/S0375-9601(98)00270-9
PG 8
WC Physics, Multidisciplinary
SC Physics
GA 112YN
UT WOS:000075522600011
ER
PT J
AU Baker, AD
Yen, MW
Donovan, RJ
Morgan, RJ
George, C
AF Baker, AD
Yen, MW
Donovan, RJ
Morgan, RJ
George, C
TI X-ray analysis of novel organic aromatic salts and precursors
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
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DT Meeting Abstract
C1 CUNY Queens Coll, Dept Chem & Biochem, Flushing, NY 11367 USA.
Fordham Univ, Dept Chem, Bronx, NY 10458 USA.
Marshall Univ, Huntington, WV 25755 USA.
USN, Res Lab, Struct Matter Lab, Washington, DC 20375 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
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PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
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PY 1998
VL 216
MA 252-INOR
BP U74
EP U74
PN 2
PG 1
WC Chemistry, Multidisciplinary
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GA 107WY
UT WOS:000075235000253
ER
PT J
AU Balderson, SD
Nivens, DA
Lacy, WB
Conrad, DW
AF Balderson, SD
Nivens, DA
Lacy, WB
Conrad, DW
TI Silane stability on silicon surfaces as measured by variable angle
spectroscopic ellipsometry, AFM, and contact angle measurements.
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C1 Geocenters Inc, Rockville, MD 20852 USA.
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PY 1998
VL 216
MA 063-ANYL
BP U158
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PN 1
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WC Chemistry, Multidisciplinary
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GA 107WX
UT WOS:000075234900405
ER
PT J
AU Bitterwolf, TE
Saygh, A
Bays, JT
Shade, JE
AF Bitterwolf, TE
Saygh, A
Bays, JT
Shade, JE
TI Frozen Nujol matrix and solution photochemistry of linked
cyclopentadienyl-allyl compounds of molybdenum and chromium.
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C1 Univ Idaho, Dept Chem, Moscow, ID 83844 USA.
USN Acad, Dept Chem, Annapolis, MD 21402 USA.
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PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
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PD AUG 23
PY 1998
VL 216
MA 562-INOR
BP U170
EP U170
PN 2
PG 1
WC Chemistry, Multidisciplinary
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GA 107WY
UT WOS:000075235000562
ER
PT J
AU Brady, RF
Schmidt, DL
AF Brady, RF
Schmidt, DL
TI Low bioadhesion on self-assembled fluoropolymer surfaces.
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C1 USN, Res Lab, Mat Chem Branch, Washington, DC 20375 USA.
Dow Chem Co, Cent Res & Dev, Adv Polymer Syst Lab, Midland, MI 48674 USA.
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PD AUG 23
PY 1998
VL 216
MA 241-POLY
BP U72
EP U72
PN 3
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WC Chemistry, Multidisciplinary
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GA 107WZ
UT WOS:000075235100240
ER
PT J
AU Conrad, DW
Nivens, DA
Balderson, SD
Lacy, WB
AF Conrad, DW
Nivens, DA
Balderson, SD
Lacy, WB
TI Hydrolytic stability of poly(ethylene glycol) organosilane monolayers.
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VL 216
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EP U631
PN 2
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WC Chemistry, Multidisciplinary
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GA 107WY
UT WOS:000075235001972
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PT J
AU Donovan, RJ
George, C
Morgan, RJ
AF Donovan, RJ
George, C
Morgan, RJ
TI Instantaneous and tunable fluorescence with thioformamides
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C1 CUNY Queens Coll, Dept Chem & Biochem, Flushing, NY 11367 USA.
USN, Res Lab, Struct Matter Lab, Washington, DC 20375 USA.
Marshall Univ, Dept Chem, Huntington, WV 25755 USA.
NR 0
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PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
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PD AUG 23
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VL 216
MA 251-INOR
BP U73
EP U74
PN 2
PG 2
WC Chemistry, Multidisciplinary
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GA 107WY
UT WOS:000075235000252
ER
PT J
AU Green, JBD
Novoradovsky, A
Lee, GU
Colton, RJ
AF Green, JBD
Novoradovsky, A
Lee, GU
Colton, RJ
TI A novel platform for improving force measurements with scanning probe
microscopy.
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C1 USN, Res Lab, Surface Chem Div, Washington, DC 20375 USA.
RI Lee, Gil/P-8696-2016
OI Lee, Gil/0000-0002-7949-5848
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U1 1
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PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
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PD AUG 23
PY 1998
VL 216
MA 317-COLL
BP U676
EP U676
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WX
UT WOS:000075234902002
ER
PT J
AU Green, JBD
Novoradovsky, A
Lee, GU
Colton, RJ
AF Green, JBD
Novoradovsky, A
Lee, GU
Colton, RJ
TI Force measurements with scanning probe microscopy: A controlled approach
to avoid the problems associated with damage, coverage, and fouling.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
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C1 USN, Res Lab, Surface Chem Div, Washington, DC 20375 USA.
RI Lee, Gil/P-8696-2016
OI Lee, Gil/0000-0002-7949-5848
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U1 1
U2 1
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PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
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PD AUG 23
PY 1998
VL 216
MA 146-COLL
BP U625
EP U625
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WX
UT WOS:000075234901831
ER
PT J
AU Herman, WN
Roberts, MJ
Stenger-Smith, JD
Chafin, AP
Hollins, RA
Lindsay, GA
Wynne, KJ
AF Herman, WN
Roberts, MJ
Stenger-Smith, JD
Chafin, AP
Hollins, RA
Lindsay, GA
Wynne, KJ
TI Persistent in-plane order through 90 bilayers in an accordion polymer LB
film.
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C1 NAWC, WD, China Lake, CA 93555 USA.
Off Naval Res, Arlington, VA 22217 USA.
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PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
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JI Abstr. Pap. Am. Chem. Soc.
PD AUG 23
PY 1998
VL 216
MA 586-POLY
BP U175
EP U175
PN 3
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WZ
UT WOS:000075235100582
ER
PT J
AU Jha, SK
Cheon, KS
Green, MM
Selinger, JV
AF Jha, SK
Cheon, KS
Green, MM
Selinger, JV
TI Materials-chirality: Majority rules among the sergeants.
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C1 USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
Polytech Univ, Polymer Res Inst, Metrotech Ctr 6, Brooklyn, NY 11201 USA.
RI Selinger, Jonathan/D-1445-2010
OI Selinger, Jonathan/0000-0002-4982-2457
NR 0
TC 0
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U1 1
U2 3
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PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
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PD AUG 23
PY 1998
VL 216
MA 069-POLY
BP U21
EP U21
PN 3
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WZ
UT WOS:000075235100070
ER
PT J
AU Kurihara, LK
Chow, GM
Everett, RK
AF Kurihara, LK
Chow, GM
Everett, RK
TI Chemical synthesis of nanostructured metallic and ceramic coatings and
powders.
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C1 USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA.
Potomac Res Int, Fairfax, VA 22030 USA.
NR 0
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PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
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PD AUG 23
PY 1998
VL 216
MA 066-MACR
BP U318
EP U318
PN 3
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WZ
UT WOS:000075235100972
ER
PT J
AU Lacy, WB
Vittal, VR
Turner, DC
Conrad, DW
Gaber, BP
AF Lacy, WB
Vittal, VR
Turner, DC
Conrad, DW
Gaber, BP
TI An LFM biosensor based on protein patterning of photoactive PEG-silane
and photobiotin surfaces.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
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C1 USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
NR 0
TC 0
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U1 0
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PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
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PD AUG 23
PY 1998
VL 216
MA 039-ANYL
BP U153
EP U153
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WX
UT WOS:000075234900388
ER
PT J
AU Lopez, JL
Wang, ZG
Hsiao, BS
Armistead, PJ
AF Lopez, JL
Wang, ZG
Hsiao, BS
Armistead, PJ
TI Dynamic structure development during isothermal crystallization and
melting of linear polyethylenes
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
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DT Meeting Abstract
C1 SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
USN, Res Lab, Mat Chem Branch, Washington, DC 20375 USA.
RI Wang, Zhigang/F-6136-2010
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
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PD AUG 23
PY 1998
VL 216
MA 178-PMSE
BP U867
EP U867
PN 2
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WY
UT WOS:000075235002607
ER
PT J
AU Mera, AE
Wynne, KJ
AF Mera, AE
Wynne, KJ
TI A new approach to fluorosilicone elastomers.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
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C1 USN, Res Lab, Mat Chem Branch, Washington, DC 20375 USA.
Off Naval Res, Phys Sci S&T Div, Arlington, VA 22217 USA.
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U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
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PD AUG 23
PY 1998
VL 216
MA 211-POLY
BP U63
EP U63
PN 3
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WZ
UT WOS:000075235100210
ER
PT J
AU Provenzano, V
AF Provenzano, V
TI Fullerene-reinforced nanocomposites.
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C1 USN, Res Lab, Div Mat Sci & Technol, Phys Met Branch, Washington, DC 20375 USA.
NR 0
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PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
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PD AUG 23
PY 1998
VL 216
MA 078-MACR
BP U322
EP U322
PN 3
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WZ
UT WOS:000075235100984
ER
PT J
AU Roberts, MJ
Lindsay, GA
Wynne, KJ
AF Roberts, MJ
Lindsay, GA
Wynne, KJ
TI Polar films for nonlinear optics formed by alternating polyelectrolyte
deposition.
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C1 USN, Air Warfare Ctr, Weapons Div, Chem & Mat Branch, China Lake, CA 93555 USA.
NR 0
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PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
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PD AUG 23
PY 1998
VL 216
MA 626-POLY
BP U203
EP U203
PN 3
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WZ
UT WOS:000075235100623
ER
PT J
AU Rolison, DR
Long, JW
Morris, CA
Anderson, ML
Merzbacher, CI
AF Rolison, DR
Long, JW
Morris, CA
Anderson, ML
Merzbacher, CI
TI Synthesis and characterization of aerogels as integrated, networked,
nanostructured electrocatalysts.
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C1 USN, Res Lab, Washington, DC 20375 USA.
NR 0
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PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
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PD AUG 23
PY 1998
VL 216
MA 003-CATL
BP U279
EP U279
PN 3
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WZ
UT WOS:000075235100849
ER
PT J
AU Sastri, SB
Keller, TM
AF Sastri, SB
Keller, TM
TI Phthalonitrile polymer for high temperature applications.
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C1 USN, Res Lab, Div Chem, Mat Chem Branch, Washington, DC 20375 USA.
NR 0
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U1 1
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 23
PY 1998
VL 216
MA 078-POLY
BP U24
EP U24
PN 3
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WZ
UT WOS:000075235100078
ER
PT J
AU Schoen, PE
Singh, A
AF Schoen, PE
Singh, A
TI Role of giant vesicles from diacetylenic phospholipids in the
development of colorimetric detection for receptor - Ligand interaction.
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C1 USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
NR 0
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PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
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PD AUG 23
PY 1998
VL 216
MA 113-IEC
BP U945
EP U945
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WX
UT WOS:000075234902791
ER
PT J
AU Snow, AW
Buckley, LJ
Armistead, JP
AF Snow, AW
Buckley, LJ
Armistead, JP
TI Fluoromethylene cyanate ester resins.
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C1 USN, Res Lab, Washington, DC 20375 USA.
NR 0
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PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
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PD AUG 23
PY 1998
VL 216
MA 202-POLY
BP U60
EP U60
PN 3
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WZ
UT WOS:000075235100201
ER
PT J
AU Watanabe, M
Soosaar, K
Chun, HM
AF Watanabe, M
Soosaar, K
Chun, HM
TI Multigranular molecular dynamics simulations of Bacteriorhodopsin.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 Moldyn Inc, Cambridge, MA 02139 USA.
Univ New Orleans, New Orleans, LA 70148 USA.
USN, Res Lab, Washington, DC 20375 USA.
Univ Virginia, Dept Mat Sci, Charlottesville, VA 22903 USA.
Mat Directorate, Wright Patterson AFB, OH USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 23
PY 1998
VL 216
MA 101-PHYS
BP U687
EP U687
PN 2
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WY
UT WOS:000075235002046
ER
PT J
AU Yoo, CH
Yee, RY
Zarras, P
AF Yoo, CH
Yee, RY
Zarras, P
TI Optical loss characterization methods of thin organic polymer films.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 USN, Air Warfare Weap Div, Lasers & Opt Sect, China Lake, CA 93555 USA.
USN, Air Warfare Weap Div, Mat Characterizat Sect, China Lake, CA 93555 USA.
USN, Air Warfare Weap Div, Mat Synthesis Sect, China Lake, CA 93555 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD AUG 23
PY 1998
VL 216
MA 629-POLY
BP U204
EP U204
PN 3
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA 107WZ
UT WOS:000075235100626
ER
PT J
AU Kidwell, DA
Holland, JC
Athanaselis, S
AF Kidwell, DA
Holland, JC
Athanaselis, S
TI Testing for drugs of abuse in saliva and sweat
SO JOURNAL OF CHROMATOGRAPHY B
LA English
DT Review
DE reviews; sweat; saliva; drugs of abuse
ID CHROMATOGRAPHY MASS-SPECTROMETRY; TOBACCO-SMOKE EXPOSURE; PERFORMANCE
LIQUID-CHROMATOGRAPHY; ETHANOL CONCENTRATIONS; PAROTID-SALIVA;
BODY-FLUIDS; HUMAN-HAIR; COTININE CONCENTRATIONS; HEALTHY-VOLUNTEERS;
COLLECTION DEVICE
AB The detection of marijuana, cocaine, opiates, amphetamines, benzodiazepines, barbiturates, PCP, alcohol and nicotine in saliva and sweat is reviewed, with emphasis on forensic applications. The short window of detection and lower levels of drugs present compared to levels found in urine limits the applications of sweat and saliva screening for drug use determination. However, these matrices may be applicable for use in driving while intoxicated and surveying populations far illicit drug use. Although not an illicit drug, the detection of ethanol is reviewed because of its importance in driving under the influence. Only with alcohol may saliva be used to estimate blood levels and the degree of impairment because of the problems with oral contamination and drug concentrations varying depending upon how the saliva is obtained. The detection of nicotine and cotinine (from smoking tobacco) is also covered because of its use in Life insurance screening and surveying for passive exposure. (C) 1998 Elsevier Science B.V. All rights reserved.
C1 USN, Div Chem, Res Lab, Washington, DC 20375 USA.
Geocenters Inc, Ft Washington, MD 20744 USA.
Univ Athens, Dept Forens Med & Toxicol, Athens 11527, Greece.
RP Kidwell, DA (reprint author), USN, Div Chem, Res Lab, Washington, DC 20375 USA.
NR 204
TC 150
Z9 151
U1 7
U2 69
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-4347
J9 J CHROMATOGR B
JI J. Chromatogr. B
PD AUG 21
PY 1998
VL 713
IS 1
BP 111
EP 135
DI 10.1016/S0378-4347(97)00572-0
PG 25
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 103EG
UT WOS:000075144600007
PM 9700555
ER
PT J
AU Berghmans, D
Clette, F
Moses, D
AF Berghmans, D
Clette, F
Moses, D
TI Quiet Sun EUV transient brightenings and turbulence - A panoramic view
by EIT on board SOHO
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE Sun : corona; Sun : transition region; Sun : UV radiation; turbulence
ID TELESCOPE POWER SPECTRA; SOLAR ACTIVE REGIONS; X-RAY-EMISSION;
TRANSITION REGION; MHD-TURBULENCE; CORONA; NANOFLARES; ENERGY;
ULTRAVIOLET; MICROFLARES
AB Since January 1996, the Extreme-Ultraviolet Imaging Telescope (EIT, onboard SOHO) has produced unique image sequences covering a wide field of view with a high temporal resolution, in the He II transition region line and in several Fe coronal emission lines. Using two sequences acquired with cadences of the order of one minute and with durations ranging from one hour to several hours, we analyse the dynamical properties of the transition region and corona. We find evidence of turbulence both in spatial and in temporal power spectra suggesting that the plasma of the quiet solar atmosphere is in a permanent state of turbulence.
As predicted by numerical simulations, this turbulence has an highly intermittent nature. We find an unexpectedly large number of small-scale brightenings. The coronal brightenings are identified as the low energy counterparts of "X-ray network flares" observed with SXT on board Yohkoh. The thousands of brightenings observed by EIT in the transition region include many that are similar to "blinkers" observed with CDS, though we find a larger variety.
Thanks to EIT's wide spatial coverage, we can perform a large scale statistical study, complementing spectroscopic studies which give access to only a very small subsample of events. We present occurrence distributions of duration, size and radiative output of the brightenings as well as various correlations between these parameters. The energy injected by the brightenings into the solar atmosphere is insufficient to be in itself responsible for coronal heating. We discuss the importance of the ubiquitous small brightenings as perhaps the most visible aspect of yet undetected heating events higher up in the quiet corona.
C1 Observ Royal Belgique, B-1180 Brussels, Belgium.
USN, Res Lab, Washington, DC 20375 USA.
RP Berghmans, D (reprint author), Observ Royal Belgique, Ringlaan 3, B-1180 Brussels, Belgium.
EM David.Berghmans@ksb-orb.oma.be
NR 50
TC 121
Z9 121
U1 0
U2 2
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD AUG 20
PY 1998
VL 336
IS 3
BP 1039
EP 1055
PG 17
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 118FL
UT WOS:000075827700040
ER
PT J
AU Keenan, FP
Pinfield, DJ
Woods, VJ
Reid, RHG
Conlon, ES
Pradhan, AK
Zhang, HL
Widing, KG
AF Keenan, FP
Pinfield, DJ
Woods, VJ
Reid, RHG
Conlon, ES
Pradhan, AK
Zhang, HL
Widing, KG
TI Extreme ultraviolet transitions of Ca XVI in solar flare and laboratory
spectra
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE atomic data; atomic processes; methods : laboratory; Sun : flares; Sun :
UV radiation
ID B-LIKE IONS; ELECTRON-IMPACT EXCITATION; BORON-LIKE IONS; ATOMIC DATA;
RATE COEFFICIENTS; IRON PROJECT; LINE RATIOS; SPECTROSCOPIC DIAGNOSTICS;
ISOELECTRONIC SEQUENCE; XUV OBSERVATIONS
AB New R-matrix calculations of electron impact excitation rates for transitions among the 2s(2)2p, 2s2p(2), and 2p(3) levels of Ca XVI are presented. These data are subsequently used, in conjunction with recent estimates for proton excitation rates, to derive theoretical electron density sensitive emission-line ratios involving 2s(2)2p-2s2p(2) transitions in the similar to 155-225 Angstrom wavelength range. A comparison of these with observational data for solar flares, obtained with the Naval Research Laboratory's S082A spectrograph on board Skylab, reveals excellent agreement between theory and observation. In addition, the theoretical ratios compare favorably with those measured from the TEXT tokamak plasma, for which the electron temperature and density have been independently determined. This provides experimental support for the accuracy of the atomic data, and hence line ratio calculations, employed in the present analysis.
C1 Queens Univ Belfast, Dept Pure & Appl Phys, Belfast BT7 1NN, Antrim, North Ireland.
Queens Univ Belfast, Dept Appl Math & Theoret Phys, Belfast BT7 1NN, Antrim, North Ireland.
Armagh Planetarium, Armagh BT61 9DB, North Ireland.
Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
USN, EO Hulburt Ctr Space Res, Res Lab, Washington, DC 20375 USA.
RP Keenan, FP (reprint author), Queens Univ Belfast, Dept Pure & Appl Phys, Belfast BT7 1NN, Antrim, North Ireland.
NR 41
TC 12
Z9 12
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 20
PY 1998
VL 503
IS 2
BP 953
EP 958
DI 10.1086/306028
PN 1
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 152KN
UT WOS:000077776700040
ER
PT J
AU Deniel, C
Bevilacqua, RM
Pommereau, JP
Lefevre, F
AF Deniel, C
Bevilacqua, RM
Pommereau, JP
Lefevre, F
TI Arctic chemical ozone depletion during the 1994-1995 winter deduced from
POAM II satellite observations and the REPROBUS three-dimensional model
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID STRATOSPHERIC POLAR VORTEX; UARS MLS; CLO; VALIDATION; HOLE
AB Chemical ozone depletion during the unusually cold 1994-1995 Arctic winter is quantified using ozone profile measurements from the space-based Polar Ozone and Aerosol Measurement (POAM II) instrument and the REPROBUS three-dimensional chemistry transport model. The model is first used to determine the dynamical component of the observed variations, allowing the chemical component to be quantified from the observations. This technique has been previously used to estimate ozone loss from ground based total column measurements. In the present study, it has been adapted to the POAM II vertical profile measurements in order to document the vertical evolution of ozone chemical loss throughout the winter both inside and outside the polar vortex. The cumulative ozone loss thus obtained inside the vortex at the end of the winter is found to reach a maximum of 51% (with respect to the REPROBUS dynamics-only prediction) at the 430 K potential temperature level. The largest ozone depletion rates were observed in late January when record low temperatures were reported, and the vortex was largely displaced towards midlatitudes. The maximum depletion rate was 1.4%/d occurring at the 470 K potential temperature level. Smaller but significant chemical ozone depletion was also found outside the vortex, where cumulative ozone losses of 19% were observed in the lower stratosphere. Finally, comparison of chemical ozone loss inferred from the POAM measurements with that obtained from the REPROBUS model indicates that the model underestimates cumulative ozone loss inside the vortex (by similar to 30% in the lower stratosphere).
C1 USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA.
CNRS, Serv Aeron, F-91371 Verrieres Le Buisson, France.
Ctr Natl Rech Meteorol, Meteo France, F-31057 Toulouse, France.
RP Deniel, C (reprint author), USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA.
EM deniel@poamb.nrl.navy.mil
NR 43
TC 43
Z9 43
U1 0
U2 0
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 AUG 20
PY 1998
VL 103
IS D15
BP 19231
EP 19244
DI 10.1029/98JD01446
PG 14
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 112LE
UT WOS:000075495500024
ER
PT J
AU Campillo, AJ
Eversole, JD
Lin, HB
AF Campillo, AJ
Eversole, JD
Lin, HB
TI Further comment on the existence of a modified hydrogen bonding ratio in
laboratory-generated water droplets
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Editorial Material
ID LIQUID AEROSOL INTERFACE; ATMOSPHERIC CHEMISTRY; SPECTROSCOPIC TOUR;
MICRODROPLETS; TEMPERATURE; EMISSION
AB We offer further comments regarding the controversial claim of Zhang er nl. [1994] that a standard vibrating orifice aerosol generator modifies the hydrogen bonding ratio of laboratory water droplets. New data reported here fail to support their observation of a surface charge induced Raman spectral change as reported by Aker ct nl. [1996a].
C1 USN, Opt Phys Branch, Res Lab, Washington, DC 20375 USA.
RP Campillo, AJ (reprint author), USN, Opt Phys Branch, Res Lab, Code 5610, Washington, DC 20375 USA.
EM campillo@nrl.navy.mil
NR 25
TC 5
Z9 5
U1 1
U2 3
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 AUG 20
PY 1998
VL 103
IS D15
BP 19271
EP 19275
DI 10.1029/97JD00934
PG 5
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 112LE
UT WOS:000075495500027
ER
PT J
AU Barvosa-Carter, W
Aziz, MJ
Gray, LJ
Kaplan, T
AF Barvosa-Carter, W
Aziz, MJ
Gray, LJ
Kaplan, T
TI Kinetically driven growth instability in stressed solids
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID PHASE EPITAXIAL-GROWTH; NONHYDROSTATIC STRESS; CRYSTAL-GROWTH; AMORPHOUS
SI; TRANSITION; DEPENDENCE; ROUGHNESS; STABILITY; STRAIN
AB We report a new stress-induced kinetically driven morphological instability for driven systems. The effect of stress on the interfacial mobility couples to stress variations along a perturbed planar growth front. Comparison of theory and experiment for solid phase epitaxy at a corrugated Si(001) interface, with no free parameters, indicates that the new mechanism is required to account for the observed growth of the corrugation amplitude. This mechanism operates in conjunction with known diffusional and elastic strain energy-driven instabilities in determining morphological evolution.
C1 Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA.
Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
RP Barvosa-Carter, W (reprint author), USN, Res Lab, Code 6177, Washington, DC 20375 USA.
NR 26
TC 66
Z9 66
U1 3
U2 14
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 AUG 17
PY 1998
VL 81
IS 7
BP 1445
EP 1448
DI 10.1103/PhysRevLett.81.1445
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 110UC
UT WOS:000075398100024
ER
PT J
AU Kiriakidis, K
Grivas, A
Tzes, A
AF Kiriakidis, K
Grivas, A
Tzes, A
TI Quadratic stability analysis of the Takagi-Sugeno fuzzy model
SO FUZZY SETS AND SYSTEMS
LA English
DT Article
DE fuzzy model; control theory; quadratic stability; perturbed system;
fuzzy model-based control
ID CONTROL-SYSTEMS; IDENTIFICATION; DESIGN
AB The nonlinear dynamic Takagi-Sugeno fuzzy model with offset terms is analyzed as a perturbed linear system. A sufficient criterion for the robust stability of this nominal system against nonlinear perturbations guarantees quadratic stability of the fuzzy model. The criterion accepts a convex programming formulation of reduced computational cost compared to the common Lyapunov matrix approach. Parametric robust control techniques suggest synthesis tools for stabilization of the fuzzy system. Application examples on fuzzy models of nonlinear plants advocate the efficiency of the method. The examples demonstrate reduced conservatism compared to norm-based criteria. (C) 1998 Elsevier Science B.V. All rights reserved.
C1 Polytech Univ, Dept Mech Engn, Metrotech Ctr 6, Brooklyn, NY 11201 USA.
RP Kiriakidis, K (reprint author), USN Acad, Dept Weap & Syst Engn, 105 Maryland Ave, Annapolis, MD 21402 USA.
OI Tzes, Anthony/0000-0003-3709-2810
NR 22
TC 29
Z9 29
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0165-0114
J9 FUZZY SET SYST
JI Fuzzy Sets Syst.
PD AUG 16
PY 1998
VL 98
IS 1
BP 1
EP 14
DI 10.1016/S0165-0114(96)00390-9
PG 14
WC Computer Science, Theory & Methods; Mathematics, Applied; Statistics &
Probability
SC Computer Science; Mathematics
GA ZW338
UT WOS:000074400900001
ER
PT J
AU Cowan, DN
Gray, GC
DeFraites, RF
AF Cowan, DN
Gray, GC
DeFraites, RF
TI Counterpoint: Responding to inadequate critique of birth defects paper
SO AMERICAN JOURNAL OF EPIDEMIOLOGY
LA English
DT Editorial Material
ID PERSIAN-GULF-WAR; VETERANS
C1 Exponent Hlth Grp, Landover, MD 20785 USA.
USN, Hlth Res Ctr, San Diego, CA 92152 USA.
Off Army Surgeon Gen, Falls Church, VA USA.
RP Cowan, DN (reprint author), Exponent Hlth Grp, 8201 Corp Dr,Suite 680, Landover, MD 20785 USA.
NR 11
TC 6
Z9 6
U1 1
U2 1
PU JOHNS HOPKINS UNIV SCHOOL HYGIENE PUB HEALTH
PI BALTIMORE
PA 111 MARKET PLACE, STE 840, BALTIMORE, MD 21202-6709 USA
SN 0002-9262
J9 AM J EPIDEMIOL
JI Am. J. Epidemiol.
PD AUG 15
PY 1998
VL 148
IS 4
BP 326
EP 327
PG 2
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 109VN
UT WOS:000075344700003
PM 9717874
ER
PT J
AU Gray, GC
Knoke, JD
Berg, SW
Wignall, FS
Barrett-Connor, E
AF Gray, GC
Knoke, JD
Berg, SW
Wignall, FS
Barrett-Connor, E
TI Counterpoint: Responding to suppositions and misunderstandings
SO AMERICAN JOURNAL OF EPIDEMIOLOGY
LA English
DT Editorial Material
ID PERSIAN-GULF-WAR; UNITED-STATES-NAVY
C1 USN, Hlth Res Ctr, Emerging Illness Div, San Diego, CA 92186 USA.
Hampton Hlth Dept, Hampton, VA USA.
AEA Int, Irian Jaya, Indonesia.
Univ Calif San Diego, Sch Med, Dept Family & Prevent Med, San Diego, CA 92103 USA.
RP Gray, GC (reprint author), USN, Hlth Res Ctr, Emerging Illness Div, Box 85122, San Diego, CA 92186 USA.
NR 51
TC 31
Z9 31
U1 2
U2 2
PU JOHNS HOPKINS UNIV SCHOOL HYGIENE PUB HEALTH
PI BALTIMORE
PA 111 MARKET PLACE, STE 840, BALTIMORE, MD 21202-6709 USA
SN 0002-9262
J9 AM J EPIDEMIOL
JI Am. J. Epidemiol.
PD AUG 15
PY 1998
VL 148
IS 4
BP 328
EP 333
PG 6
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 109VN
UT WOS:000075344700004
PM 9717875
ER
PT J
AU Hyams, KC
Roswell, RH
AF Hyams, KC
Roswell, RH
TI Resolving the Gulf War syndrome question
SO AMERICAN JOURNAL OF EPIDEMIOLOGY
LA English
DT Article
ID US VETERANS
C1 USN, Med Res Inst, Div Epidemiol, Rockville, MD 20852 USA.
RP Hyams, KC (reprint author), USN, Med Res Inst, Div Epidemiol, 12300 Washington Ave, Rockville, MD 20852 USA.
NR 34
TC 13
Z9 13
U1 2
U2 2
PU JOHNS HOPKINS UNIV SCHOOL HYGIENE PUB HEALTH
PI BALTIMORE
PA 111 MARKET PLACE, STE 840, BALTIMORE, MD 21202-6709 USA
SN 0002-9262
J9 AM J EPIDEMIOL
JI Am. J. Epidemiol.
PD AUG 15
PY 1998
VL 148
IS 4
BP 339
EP 342
PG 4
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 109VN
UT WOS:000075344700006
PM 9717876
ER
PT J
AU Gray, GC
Hawksworth, AW
Smith, TC
Kang, HK
Knoke, JD
Gackstetter, GD
AF Gray, GC
Hawksworth, AW
Smith, TC
Kang, HK
Knoke, JD
Gackstetter, GD
TI Gulf War veterans' health registries. Who is most likely to seek
evaluation?
SO AMERICAN JOURNAL OF EPIDEMIOLOGY
LA English
DT Article
DE diagnosis; military medicine; Persian Gulf syndrome; risk factors;
veterans
ID OPERATION-DESERT-STORM; PERSIAN-GULF; SHIELD
AB Since the Persian Gulf War ended in 1991, many veterans have sought medical evaluation in the Department of Veterans Affairs Persian Gulf Veterans' Health Registry (VA registry) or the Department of Defense's Comprehensive Clinical Evaluation Program (DoD registry). Using combined data collected from 1993 to 1997 from the VA and DoD registries, the authors compared the characteristics of registry participants (n = 74,653) with those of all Gulf War veterans (n = 696,531) to determine the personnel most likely to seek medical evaluation. Using multiple logistic regression, the authors found that service branch and type were strongly associated with registry participation, with Army (adjusted odds ratio (OR) = 4.7, 95% confidence interval (CI) 4.6-4.9) and National Guard (OR = 2.6, 95% CI 2.5-2.6) personnel at highest odds compared with reference category personnel. Registry participants also were more likely to have been stationed in the Gulf War theater during the fighting (OR = 2.2), to be older(>31 years/<22 years OR = 2.1), to have been an enlisted person (OR = 2.0), to have been construction workers (OR = 1.3), to be female (OR = 1.3), and to have been hospitalized during the 12-month period before the war (OR = 1.2). These findings are useful in generating hypotheses regarding postwar morbidity. They also suggest that subpopulations of Gulf War veterans have a higher prevalence of symptoms and merit further study.
C1 USN, Hlth Res Ctr, Emerging Illness Div, San Diego, CA 92186 USA.
Dept Vet Affairs, Environm Epidemiol Serv, Washington, DC USA.
Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA.
RP Gray, GC (reprint author), USN, Hlth Res Ctr, Emerging Illness Div, POB 85122, San Diego, CA 92186 USA.
NR 24
TC 46
Z9 46
U1 2
U2 2
PU JOHNS HOPKINS UNIV SCHOOL HYGIENE PUB HEALTH
PI BALTIMORE
PA 111 MARKET PLACE, STE 840, BALTIMORE, MD 21202-6709 USA
SN 0002-9262
J9 AM J EPIDEMIOL
JI Am. J. Epidemiol.
PD AUG 15
PY 1998
VL 148
IS 4
BP 343
EP 349
PG 7
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA 109VN
UT WOS:000075344700007
PM 9717877
ER
PT J
AU Ligler, FS
Anderson, GP
Davidson, PT
Foch, RJ
Ives, JT
King, KD
Page, G
Stenger, DA
Whelan, JP
AF Ligler, FS
Anderson, GP
Davidson, PT
Foch, RJ
Ives, JT
King, KD
Page, G
Stenger, DA
Whelan, JP
TI Remote sensing using an airborne biosensor
SO ENVIRONMENTAL SCIENCE & TECHNOLOGY
LA English
DT Article
ID FIBER OPTIC BIOSENSOR
AB There is no current method for remote identification of aerosolized bacteria. In particular, such a capability is required to warn of a biological warfare attack prior to human exposure. A fiber optic biosensor, capable of running four simultaneous immunoassays, was integrated with an automated fluidics unit, a cyclone-type air sampler, a radio transceiver, and batteries on a small, remotely piloted airplane capable of carrying a 4.5-kg payload. The biosensor system was able to collect aerosolized bacteria in flight, identify them, and transmit the data to the operator on the ground. The results demonstrate the feasibility of integrating a biosensor into a portable, remotely operated system for environmental analysis.
C1 USN, Res Lab, Washington, DC 20375 USA.
Georgetown Univ, Washington, DC 20007 USA.
Geocenters Inc, Ft Washington, MD 20744 USA.
Kaman Sci Corp, Alexandria, VA 22308 USA.
Nova Inc, Alexandria, VA 22308 USA.
RP Ligler, FS (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM FLigler@CBMSE.NRL.Navy.mil
RI Anderson, George/D-2461-2011
OI Anderson, George/0000-0001-7545-9893
NR 12
TC 42
Z9 44
U1 0
U2 4
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0013-936X
J9 ENVIRON SCI TECHNOL
JI Environ. Sci. Technol.
PD AUG 15
PY 1998
VL 32
IS 16
BP 2461
EP 2466
DI 10.1021/es970991p
PG 6
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 110KX
UT WOS:000075380800015
ER
PT J
AU Carroll, JJ
Koepke, ME
Zintl, MW
Gavrishchaka, V
Ganguli, G
AF Carroll, JJ
Koepke, ME
Zintl, MW
Gavrishchaka, V
Ganguli, G
TI Velocity-shear origin of low-frequency electrostatic ion-gyroresonant
waves
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID CYCLOTRON TURBULENCE; ALFVEN WAVES; PLASMA; ACCELERATION; PARALLEL
AB Electrostatic ion-cyclotron waves with spectral features below the ion gyrofrequency and spaced by small fractions of the ion gyrofrequency are reported, a result not possible for waves associated with the well-known current-driven electrostatic ion-cyclotron (CDEIC) instability. This is accomplished by producing a localized, transverse (to the magnetic field B (z) over cap) electric field E(x) (x) over cap in a laboratory plasma to excite inhomogeneous energy-density driven (IEDD) waves and by exploiting the k(y)v(E) dependence of the IEDD mode frequency, where k(y) and v(E) are the components of the IEDD wavevector and plasma drift speed, respectively, along the E x B direction. The IEDD frequency range is shown to reach down to one-third of the ion gyrofrequency, a range usually reserved for other types of waves, e.g., ion-acoustic waves. These results may be relevant to broadband ELF waves observed in the ionosphere.
C1 W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA.
USN, Res Lab, Washington, DC 20375 USA.
RP Carroll, JJ (reprint author), Univ Michigan, Ann Arbor, MI 48109 USA.
NR 24
TC 13
Z9 13
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD AUG 15
PY 1998
VL 25
IS 16
BP 3099
EP 3102
DI 10.1029/98GL02330
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 111WT
UT WOS:000075462000011
ER
PT J
AU Veefkind, JP
de Leeuw, G
Durkee, PA
AF Veefkind, JP
de Leeuw, G
Durkee, PA
TI Retrieval of aerosol optical depth over land using two-angle view
satellite radiometry during TARFOX
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID ATSR-2
AB A new aerosol optical depth retrieval algorithm is presented that uses the two-angle view capability of the Along Track Scanning Radiometer 2 (ATSR-2). By combining the two-angle view and the spectral information this so-called dual view algorithm separates between aerosol and surface contributions to the top of the atmosphere radiance. First validation of the dual view algorithm was performed during the Tropospheric Aerosol Radiative Forcing Observational Experiment (TARFOX), which was conducted at the mid-Atlantic coast of the United States in July 1996. The satellite retrieved spectral aerosol optical depth is in good agreement with the aerosol optical depth from ground-based Sun/sky radiometers in three out of four cases. This shows the potential of aerosol retrieval over land using two-angle view satellite radiometry.
C1 TNO, Phys & Elect Lab, NL-2509 JG The Hague, Netherlands.
USN, Postgrad Sch, Dept Meteorol, Monterey, CA 93943 USA.
RP Veefkind, JP (reprint author), TNO, Phys & Elect Lab, POB 96864, NL-2509 JG The Hague, Netherlands.
EM veefkind@fel.tno.nl; deleeuw@fel.tno.nl; durkee@nps.navy.mil
NR 12
TC 95
Z9 100
U1 2
U2 7
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD AUG 15
PY 1998
VL 25
IS 16
BP 3135
EP 3138
DI 10.1029/98GL02264
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 111WT
UT WOS:000075462000021
ER
PT J
AU Dunlap, BI
AF Dunlap, BI
TI Quantum chemical molecular dynamics
SO INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
LA English
DT Article; Proceedings Paper
CT Symposium on Density Functional Theory and Applications
CY JUN 03-07, 1997
CL DUKE UNIV, DURHAM, NORTH CAROLINA
SP US Natl Sci Fdn, Corning Inc, Petr Res Fund, Amer Chem Soc, Univ N Carolina, NIH Computat Struct Biol Resource, NYU, Duke Univ, Off Vice Provost Acad & Int Affairs, Duke Univ, Dept Chem
HO DUKE UNIV
DE density functional; molecular dynamics; variational fitting; analytic X
alpha; analytic derivatives
ID DENSITY-FUNCTIONAL THEORY; BAND PHOTODISSOCIATION DYNAMICS;
POTENTIAL-ENERGY SURFACES; NM PHOTODISSOCIATION; ORBITALS APPROACH;
BASIS-SETS; OPTIMIZATION; RESOLUTION; IONIZATION; SYMMETRY
AB Approximations can be consistent with the very high accuracy associated with traditional quantum chemistry provided that the approximations are variational. Variational approximations include the linear combination of atomic orbitals (LCAO) approximation of Hartree-Fock-Roothaan theory. In density functional theory, variationality usually requires that approximations be made in the expression for the energy which variationally yields the Kohn-Sham-Roothaan equations. These ideas are illustrated in a derivation of accurate forces for quantum chemical molecular dynamics using the very efficient analytic Xa method. This method is used to follow directly the time evolution of collisions in a collinear (NO)(12) system and the excited-state dynamics of ICN and ICH3 photodissociation. (C) 1998 John Wiley & Sons, Inc.
C1 USN, Res Lab, Theoret Chem Sect, Washington, DC 20375 USA.
RP Dunlap, BI (reprint author), USN, Res Lab, Theoret Chem Sect, Code 6179, Washington, DC 20375 USA.
OI Dunlap, Brett/0000-0003-1356-6559
NR 48
TC 9
Z9 9
U1 0
U2 1
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0020-7608
J9 INT J QUANTUM CHEM
JI Int. J. Quantum Chem.
PD AUG 15
PY 1998
VL 69
IS 3
BP 317
EP 325
DI 10.1002/(SICI)1097-461X(1998)69:3<317::AID-QUA10>3.0.CO;2-#
PG 9
WC Chemistry, Physical; Mathematics, Interdisciplinary Applications;
Physics, Atomic, Molecular & Chemical
SC Chemistry; Mathematics; Physics
GA 104GR
UT WOS:000075006800009
ER
PT J
AU Koleske, DD
Wickenden, AE
Henry, RL
DeSisto, WJ
Gorman, RJ
AF Koleske, DD
Wickenden, AE
Henry, RL
DeSisto, WJ
Gorman, RJ
TI Growth model for GaN with comparison to structural, optical, and
electrical properties
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Review
ID CHEMICAL-VAPOR-DEPOSITION; MOLECULAR-BEAM EPITAXY; LIGHT-EMITTING
DIODES; ALN BUFFER LAYER; POLYCRYSTALLINE DIAMOND FILMS;
SURFACE-DIFFUSION LENGTH; LOW-PRESSURE MOVPE; PLUS ADSORBED BR; III-V
NITRIDES; PHASE EPITAXY
AB A kinetic model is presented to explain the metal organic vapor phase epitaxy (MOVPE) growth of GaN. The model is based upon measured desorption rates and assumptions on the precursor dissociation and sticking probabilities. The model shows how the growth temperature and V/III ratio are linked for the growth of high quality GaN films. From a comparison of growth conditions cited in the literature to the quality of GaN produced, optimal film growth appears to occur when the V/III ratio is chosen to be slightly larger than the N to Ga desorption ratio. The relationship between the growth temperature, V/III ratio, and GaN quality are explained in terms of how the growth parameters influence the incorporation of Ga and N atoms into the growing film. The Ga and N diffusion lengths are estimated to be 2-20 nm and <1 nm at 1050 degrees C, respectively, for practical MOVPE growth rates. Growth conditions for smooth (0001) surface morphology are described in terms of the growth model, as well as possible origins for defect incorporation in GaN. As a result of the large N desorption rate, it is suggested that during growth N is incorporated into the GaN lattice via an adsorption/desorption cycle. Application of the growth model to establishing the growth process conditions and run-to-run reproducibility are also discussed. [S0021-8979(98)01616-8].
C1 USN, Res Lab, Div Elect Sci & Technol, Lab Adv Mat Synth, Washington, DC 20375 USA.
RP Koleske, DD (reprint author), USN, Res Lab, Div Elect Sci & Technol, Lab Adv Mat Synth, Code 6861, Washington, DC 20375 USA.
EM koleske@estd.nrl.navy.mil
NR 145
TC 104
Z9 108
U1 6
U2 52
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD AUG 15
PY 1998
VL 84
IS 4
BP 1998
EP 2010
DI 10.1063/1.368353
PG 13
WC Physics, Applied
SC Physics
GA 108GL
UT WOS:000075257700039
ER
PT J
AU Jacobs, GA
AF Jacobs, GA
TI Sea surface height variations in the Yellow and east China Seas - 1.
Linear response to local wind stress
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID ATMOSPHERIC PREDICTION SYSTEM; FORECAST MODEL; ALTIMETER DATA; KUROSHIO;
NORTHEAST; NOGAPS; TAIWAN
AB The sea surface height (SSH) variations observed by the TOPEX/POSEIDON satellite in the Yellow and East China Seas are examined over the 3 years from 1993 through 1995 assuming a linear response to wind stress across the region. The transfer function relating wind stress to SSH is modeled by a series of increasingly complex functions that gradually allow wind stress over successively broader regions and time periods to influence the SSH solution at a particular point. The SSH response to instantaneous wind stress at the same point in space implies an Ekman transport, but the response explains only a small fraction of the SSH variability. Relating SSH to wind stress averaged over two subregions and including both instantaneous and 12-hour lagged wind stress indicates that a significant portion of SSH variability responds to winds that are remote in both space and time. An optimal estimation of the transfer function by minimizing the error variance leads to an extended empirical orthogonal function (EEOF) analysis of the wind stress field. The SSH response to each wind mode is determined. The analysis shows the principle variations in the wind stress to consist of northerly wind bursts during winter, which produce large SSH drops in the Bohai Bay and northern Yellow Sea region. The principal wind mode also is significantly related to variations along the shelf break near the Kuroshio Current. The third and fourth wind stress modes indicate the passage of typhoons.
C1 USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Jacobs, GA (reprint author), USN, Res Lab, Code 7323, Stennis Space Ctr, MS 39529 USA.
RI Jacobs, Gregg/C-1456-2008
NR 29
TC 2
Z9 3
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD AUG 15
PY 1998
VL 103
IS C9
BP 18459
EP 18477
DI 10.1029/98JC01192
PG 19
WC Oceanography
SC Oceanography
GA 110CZ
UT WOS:000075363700008
ER
PT J
AU Jacobs, GA
Teague, WJ
Riedlinger, SK
Preller, RH
Blaha, JP
AF Jacobs, GA
Teague, WJ
Riedlinger, SK
Preller, RH
Blaha, JP
TI Sea surface height variations in the Yellow and east China Seas - 2. SSH
variability in the weekly and semiweekly bands
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID ATMOSPHERIC PREDICTION SYSTEM; FORECAST MODEL; NOGAPS
AB Two types of models are used to examine the sea surface height (SSH) variability at the principle short time frequency bands in the Yellow and East China Seas. The models are a primitive equation numerical model and a statistical model based on TOPEX/POSEIDON altimeter data. In situ pressure gauge measurements at two mooring locations are first used to evaluate each model. In addition, a comparison of the numerical and statistical models is made through duplicate analysis of the response to the main extended empirical orthogonal function wind stress modes. In the northern Yellow Sea the wind stress, pressure gauge data, numerical model, and statistical model all indicate local spectral maxima in bands centered on the weekly and semiweekly periods. The coherence of the two models with the in situ data is significant down to 3-day periods at the northern mooring and down to 5-day periods at the southern mooring. The meridional wind stress variability in the semiweekly band is higher than the weekly band energy in the northern Yellow Sea and Bohai Bay and lower than the weekly band energy across the East China Sea. The SSH variability contained in the weekly and semiweekly bands is largest in the Bohai Bay and northern Yellow Sea with a region of high energy along the Chinese coast. The spatial structure of the weekly and semiweekly SSH variability is similar to the wind stress variability at these bands with semiweekly variability higher in the Bohai Bay and northern Yellow Sea and weekly variability dominant in the East China Sea.
C1 USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
USN, Oceanog Off, Stennis Space Ctr, MS 39529 USA.
RP Jacobs, GA (reprint author), USN, Res Lab, Code 7323, Stennis Space Ctr, MS 39529 USA.
NR 15
TC 11
Z9 13
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD AUG 15
PY 1998
VL 103
IS C9
BP 18479
EP 18496
DI 10.1029/98JC01193
PG 18
WC Oceanography
SC Oceanography
GA 110CZ
UT WOS:000075363700009
ER
PT J
AU Jansen, RW
Shen, CY
Chubb, SR
Cooper, AL
Evans, TE
AF Jansen, RW
Shen, CY
Chubb, SR
Cooper, AL
Evans, TE
TI Subsurface, surface, and radar modeling of a Gulf Stream current
convergence
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID CAPE-HATTERAS; CONTINENTAL-SHELF; WATER; NORTH; WAVES; SIGNATURES; SLOPE
AB In this paper we investigate the underlying dynamics associated with a strong, line-shaped submesoscale feature that was observed in radar imagery at the boundary between Gulf Stream (GS) and shelf water near Cape Hatteras during the first Naval Research Laboratory High-Resolution Remote Sensing Experiment (HIRES 1). The line-shaped feature, which appears as a pronounced (similar to 10 dB) increase in radar cross section, extends several kilometers in the east-west direction. In situ current measurements have shown that this feature coincides with the boundary of a sharp current convergence front. These measurements also indicate that the frontal dynamics is associated with the subduction of denser GS water under lighter shelf water. Using the observation that the convergence can be attributed to a hydrodynamic instability at the water interface, we have modeled the resulting subsurface hydrodynamics on the basis of a rigid-lid, two-dimensional solution of the Navier Stokes equation. The calculations of subsurface current flow were used as input to a spectral (wave action) model of wave-current interaction to obtain the surface wave field, which in turn was used to provide input for modeling of radar backscatter. The resulting description also includes the effects of surfactant-induced wave damping on electromagnetic backscatter. Our predictions are compared with real aperture radar imagery and in situ measurements from the HIRES 1 experiment.
C1 USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
RP USN, Res Lab, Remote Sensing Div, Code 7252, Washington, DC 20375 USA.
EM jansen@tsunami.nrl.navy.mil; shen@ccf.nrl.navy.mil;
chubb@ccf.nrl.navy.mil; cooper5@nrlfs1.nrl.navy.mil;
evans@argos.nrl.navy.mil
NR 38
TC 19
Z9 19
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9275
EI 2169-9291
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD AUG 15
PY 1998
VL 103
IS C9
BP 18723
EP 18743
DI 10.1029/98JC01195
PG 21
WC Oceanography
SC Oceanography
GA 110CZ
UT WOS:000075363700024
ER
PT J
AU Lyzenga, DR
Marmorino, GO
AF Lyzenga, DR
Marmorino, GO
TI Measurement of surface currents using sequential synthetic aperture
radar images of slick patterns near the edge of the Gulf Stream
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID SEA; VELOCITIES
AB Two-dimensional surface currents are estimated over an area of similar to 100 km(2) near the inshore edge of the Gulf Stream by correlating the surface slick patterns observed on two synthetic aperture radar (SAR) images collected about 20 min apart. The currents obtained from this analysis are found to agree well with shipboard acoustic Doppler current profiler (ADCP) measurements at 10 to 20-m depths. The orientations of the long, linear slicks observed in this region differ from the mean current direction by about 16 degrees but coincide with the direction of maximum radial deformation or strain, as calculated from the observed current field. The calculated current gradients indicate a mean surface convergence of about 2 x 10(-5) s(-1) and a cyclonic vorticity of about 1 x 10(-4) s(-1), values which fall within the range of previous estimates in the study area. These results suggest that slick patterns may be used to infer surface current magnitude and direction from a time sequence of SAR images but that care must be exercised in inferring current directions from the orientations of slick patterns within a single image.
C1 Univ Michigan, Dept Naval Architecture & Marine Engn, Ann Arbor, MI 48109 USA.
USN, Res Lab, Div Remote Sensing, Washington, DC 20375 USA.
RP Lyzenga, DR (reprint author), Univ Michigan, Dept Naval Architecture & Marine Engn, Ann Arbor, MI 48109 USA.
NR 22
TC 18
Z9 21
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD AUG 15
PY 1998
VL 103
IS C9
BP 18769
EP 18777
DI 10.1029/98JC00192
PG 9
WC Oceanography
SC Oceanography
GA 110CZ
UT WOS:000075363700027
ER
PT J
AU Hwang, PA
Walsh, EJ
Krabill, WB
Swift, RN
Manizade, SS
Scott, JF
Earle, MD
AF Hwang, PA
Walsh, EJ
Krabill, WB
Swift, RN
Manizade, SS
Scott, JF
Earle, MD
TI Airborne remote sensing applications to coastal wave research
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID SURFACE CONTOUR RADAR; GREENLAND ICE-SHEET; LASER ALTIMETRY;
TRANSFORMATION; SPECTRA
AB Airborne sensors provide effective coverage of a broad region and are suitable for large-scale experiments. In this paper, two scanning sensors that use the direct ranging technique to measure surface wave displacement are described. On a NASA P-3 aircraft the sensors can complete one run across a 100-km continental shelf in 17 min. A case study is presented using radar-measured, two-dimensional surface topography to derive wave damping due to bottom friction. The results are in good agreement with an analytical model based on a quadratic formulation of bottom shear stress. This study demonstrates that remote sensing measurements can be used for rapid characterization of surface waves on the continental shelf and in coastal regions. Examples illustrated in this paper include the derivation of wavenumber spectra and estimation of the dissipation rate of shoaling ocean swell.
C1 USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
NASA, Lab Hydrosper Proc, Wallops Island, VA 23337 USA.
EG&G Serv Inc, Wallops Flight Facil, Wallops Island, VA 23337 USA.
Neptune Sci Inc, Reston, VA USA.
RP Hwang, PA (reprint author), USN, Res Lab, Div Oceanog, Code 7332, Stennis Space Ctr, MS 39529 USA.
NR 18
TC 14
Z9 14
U1 2
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD AUG 15
PY 1998
VL 103
IS C9
BP 18791
EP 18800
DI 10.1029/98JC00895
PG 10
WC Oceanography
SC Oceanography
GA 110CZ
UT WOS:000075363700029
ER
PT J
AU Paek, EG
Choe, JY
Oh, TK
AF Paek, EG
Choe, JY
Oh, TK
TI Transverse grating-assisted narrow-bandwidth acousto-optic tunable
filter
SO OPTICS LETTERS
LA English
DT Article
ID WAVELENGTH
AB An experimental acousto-optic tunable filter that has a narrow spectral bandwidth (0.2 nm at 1550 nm) and a fast (10-mu s) tuning capability with a continuous tuning range of approximately 50 nm is described. The tunable filter consists of an acousto-optic beam deflector with a diffraction grating whose grating vector is transverse to the direction of light propagation.
C1 Natl Inst Stand & Technol, Informat Technol Lab, Gaithersburg, MD 20899 USA.
USN, Ctr Surface Warfare, Dahlgren, VA 22448 USA.
RP Paek, EG (reprint author), Natl Inst Stand & Technol, Informat Technol Lab, Gaithersburg, MD 20899 USA.
NR 11
TC 9
Z9 9
U1 0
U2 3
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD AUG 15
PY 1998
VL 23
IS 16
BP 1322
EP 1324
DI 10.1364/OL.23.001322
PG 3
WC Optics
SC Optics
GA 111GE
UT WOS:000075428300026
PM 18087512
ER
PT J
AU Gole, JL
Prokes, SM
AF Gole, JL
Prokes, SM
TI Resonantly excited photoluminescence from porous silicon and the
question of bulk phonon replicates
SO PHYSICAL REVIEW B
LA English
DT Article
ID OPTICAL-PROPERTIES; LUMINESCENCE MECHANISM; ANODIC-OXIDATION; SI
NANOCRYSTALS; DEFECT CENTER; OXYGEN-ATOMS; BASIS-SETS; SURFACE; SPECTRA;
CHEMISTRY
AB High surface area porous silicon displays a light-induced visible photoluminescence (PL) in the 600-800-nm range, which has been associated with a variety of mechanisms, including emission from quantum confined silicon crystallites, surface-based states, surface confined defects, or molecular emitters. Key features used to support the quantum confinement hypothesis include the "phonon replicates," which, while observed only at very low temperatures have been interpreted as proof of a silicon phonon-assisted radiative process within the Si crystallites. For the quantum confinement model to be valid, only 2 or fewer of these "replicates" should be observed. We offer an alternate interpretation of the observed replicate features, which is not only consistent with the data presented by the quantum confinement proponents, but also is commensurate with the observation of additional structure by a number of researchers in the field. It is suggested that the observed "replicates" can be ascribed to transitions involving surface bound fluorophors that are associated with the silanone-based silicon oxyhydrides. Support for this interpretation is provided by quantum chemical calculations of the various silanone species as well as a variety of experimental observations.
C1 Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA.
USN, Res Lab, Washington, DC 20375 USA.
RP Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA.
NR 78
TC 19
Z9 19
U1 1
U2 2
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 AUG 15
PY 1998
VL 58
IS 8
BP 4761
EP 4770
DI 10.1103/PhysRevB.58.4761
PG 10
WC Physics, Condensed Matter
SC Physics
GA 117GE
UT WOS:000075772500083
ER
PT J
AU Woicik, JC
Cross, JO
Bouldin, CE
Ravel, B
Pellegrino, JG
Steiner, B
Bompadre, SG
Sorensen, LB
Miyano, KE
Kirkland, JP
AF Woicik, JC
Cross, JO
Bouldin, CE
Ravel, B
Pellegrino, JG
Steiner, B
Bompadre, SG
Sorensen, LB
Miyano, KE
Kirkland, JP
TI Diffraction anomalous fine-structure study of strained Ga1-xInxAs on
GaAs(001)
SO PHYSICAL REVIEW B
LA English
DT Article
ID X-RAYS; SCATTERING; ALLOYS; HETEROSTRUCTURES; LAYERS
AB Diffraction anomalous fine-structure measurements performed at both the Ga and As K edges have determined the Ga-As bond length to be 2.442+/-0.005 Angstrom in a buried, 213-Angstrom-thick Ga0.785In0.215As layer grown coherently on GaAs(001). This bond length corresponds to a strain-induced contraction of 0.013+/-0.005 Angstrom relative to the Ga-As bond length in bulk Ga1-xInxAs of the same composition. Together with recent extended x-ray-absorption fine-structure measurements performed at the In K edge [Woicik et al., Phys. Rev. Lett. 79, 5026 (1997)], excellent agreement is found with the uniform bond-length distortion model for strained-layer semiconductors on (001) substrates.
C1 Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
USN, Res Lab, Washington, DC 20375 USA.
Univ Washington, Dept Phys, Seattle, WA 98195 USA.
CUNY Brooklyn Coll, Dept Phys, Brooklyn, NY 11210 USA.
SFA Inc, Largo, MD 20774 USA.
RP Woicik, JC (reprint author), Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
NR 26
TC 20
Z9 20
U1 0
U2 3
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 AUG 15
PY 1998
VL 58
IS 8
BP R4215
EP R4218
DI 10.1103/PhysRevB.58.R4215
PG 4
WC Physics, Condensed Matter
SC Physics
GA 117GE
UT WOS:000075772500006
ER
PT J
AU Hrabie, JA
Srinivasan, A
George, C
Keefer, LK
AF Hrabie, JA
Srinivasan, A
George, C
Keefer, LK
TI Reaction of nitric oxide with the imine double bond of certain Schiff
bases
SO TETRAHEDRON LETTERS
LA English
DT Article
DE nitrogen oxides; imines; fragmentation reactions; diazenes
AB Reaction of nitric oxide with N-benzylidene-4-methoxyaniline produced 4-methoxybenzenediazonium nitrate and benzaldehyde. This may represent an example of the electrophilic reaction of NO with a double bond. (C) 1998 Elsevier Science Ltd. All rights reserved.
C1 NCI, Chem Synth & Anal Lab, SAIC Frederick, Frederick Canc Res & Dev Ctr, Frederick, MD 21702 USA.
NCI, Chem Sect, Comparat Carcinogenesis Lab, FCRDC, Frederick, MD 21702 USA.
USN, Res Lab, Struct Matter Lab, Washington, DC 20375 USA.
RP Hrabie, JA (reprint author), NCI, Chem Synth & Anal Lab, SAIC Frederick, Frederick Canc Res & Dev Ctr, Frederick, MD 21702 USA.
RI Keefer, Larry/N-3247-2014
OI Keefer, Larry/0000-0001-7489-9555
NR 14
TC 19
Z9 19
U1 0
U2 0
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0040-4039
J9 TETRAHEDRON LETT
JI Tetrahedron Lett.
PD AUG 13
PY 1998
VL 39
IS 33
BP 5933
EP 5936
DI 10.1016/S0040-4039(98)01218-0
PG 4
WC Chemistry, Organic
SC Chemistry
GA 104XF
UT WOS:000075041200015
ER
PT J
AU Masumura, RA
Hazzledine, PM
Pande, CS
AF Masumura, RA
Hazzledine, PM
Pande, CS
TI Yield stress of fine grained materials
SO ACTA MATERIALIA
LA English
DT Article
ID HALL-PETCH RELATION; NANOCRYSTALLINE; COPPER; MICROHARDNESS; BEHAVIOR;
DEFORMATION; DEPENDENCE; PALLADIUM; SIZE; FE
AB A model is proposed for the yield stress of ultra-fine grained materials based upon Coble creep. Using Coble creep with a threshold stress for finer grains and conventional Hall-Fetch strengthening for larger grains, an analytical relation is derived for the yield stress as a function of grain size for a range from very large to very small. A grain size distribution is incorporated into the analysis to account for a distribution of grain sizes occurring in most specimens. This result is compared with experimental data from Cu and NiP and shown to be in good agreement. Acta Metallurgica Inc. Published by Elsevier Science Ltd.
C1 USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA.
USAF, Wright Lab, Mat Directorate, MLLM, Wright Patterson AFB, OH 45433 USA.
RP Masumura, RA (reprint author), USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA.
NR 34
TC 286
Z9 303
U1 2
U2 69
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD AUG 10
PY 1998
VL 46
IS 13
BP 4527
EP 4534
DI 10.1016/S1359-6454(98)00150-5
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 112KN
UT WOS:000075494000007
ER
PT J
AU Frankel, MY
Esman, RD
AF Frankel, MY
Esman, RD
TI Dynamic null steering in an ultrawideband time-steered array antenna
SO APPLIED OPTICS
LA English
DT Article
AB We develop a method for forming squint-free wideband nulls in the antenna pattern of an ultrawideband array antenna. The technique uses an optical dispersive-prism beam former to provide time-delayed microwave signals to each antenna element for forming a squint-free main bean. The amplitude-modulated optical carrier is propagated through a set of optical Links. Each link feeds an array element and includes an amount of dispersion proportional to element position. Tuning the wavelength of the optical carrier controls the microwave signal's arrival-time delay gradient across the array. A dispersive-prism tapped delay-line microwave filter is used to frequency shape a nulling signal. The wideband nulls do not significantly distort the main beam and are steered independently of the main beam. The technique is applied to sidelobe nulling for a transmitter and for jammer suppression for a receiver array. (C) 1998 Optical Society of America.
C1 USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
RP Frankel, MY (reprint author), Ciena Corp, 920 Elkridge Landing Rd, Linthicum, MD 21090 USA.
NR 11
TC 9
Z9 9
U1 0
U2 0
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0003-6935
J9 APPL OPTICS
JI Appl. Optics
PD AUG 10
PY 1998
VL 37
IS 23
BP 5488
EP 5494
DI 10.1364/AO.37.005488
PG 7
WC Optics
SC Optics
GA 109AK
UT WOS:000075298900018
PM 18286034
ER
PT J
AU Vurgaftman, I
Meyer, JR
Julien, FH
Ram-Mohan, LR
AF Vurgaftman, I
Meyer, JR
Julien, FH
Ram-Mohan, LR
TI Design and simulation of low-threshold antimonide intersubband lasers
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID QUANTUM-WELLS
AB Optically and electrically pumped infrared lasers based on intersubband transitions in InAs/GaSb/AlsSb quantum wells are modeled in detail. The large conduction-band offset of the AlAsSb barriers with respect to the InAs wells allows the lasing wavelength to be shortened to at least 1.9 mu m. Furthermore, the small InAs electron mass results in longer phonon-limited lifetimes in the upper lasing subband as well as larger dipole matrix elements. This leads to the prediction of lower threshold currents, and hence, higher cw operating temperatures than for quantum cascade lasers based on the InCaAs/InAlAs/InP system. (C) 1998 American Institute of Physics.
C1 USN, Res Lab, Washington, DC 20375 USA.
Univ Paris Sud, URA CNRS 22, Inst Elect Fondamentale, F-91405 Orsay, France.
Worcester Polytech Inst, Worcester, MA 01609 USA.
RP Vurgaftman, I (reprint author), USN, Res Lab, Code 5613, Washington, DC 20375 USA.
RI Ram-Mohan, Ramdas/C-5167-2012
NR 14
TC 62
Z9 63
U1 1
U2 5
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD AUG 10
PY 1998
VL 73
IS 6
BP 711
EP 713
DI 10.1063/1.121976
PG 3
WC Physics, Applied
SC Physics
GA 109CJ
UT WOS:000075303400003
ER
PT J
AU Levine, SE
Sparke, LS
AF Levine, SE
Sparke, LS
TI The stability of "perfect elliptic disks." II. A minimal streaming case
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies : elliptical and lenticular, cD; galaxies : kinematics and
dynamics; galaxies : structure; methods : numerical
ID NONROTATING STELLAR-SYSTEMS; SHELL-ORBIT MODELS; GALAXY SIMULATIONS;
INSTABILITIES; EQUILIBRIUM; DYNAMICS
AB Two-dimensional realizations of self-consistent models for the "perfect elliptic disks" were tested for global stability by gravitational N-body integration. The family, of perfect elliptic disk potentials have two isolating integrals; time-independent distribution functions f(E, I(2)), which self-consistently reproduce the density distribution, can be found numerically, using a modified marching scheme to compute the relative contributions of each member in a library of orbits. The possible solutions are not unique; for a given ellipticity, the models can have a range of angular momenta. Here results are presented for cases with minimal angular momentum, hence maximal random motion. As in previous work, N-body realizations were constructed using a modified quiet start technique to place particles on these orbits uniformly in action-angle space, making the initial conditions as smooth as possible. The most elliptical models initially showed bending instabilities; by the end of the run they had become slightly rounder. The most nearly axisymmetric models tended to become more elongated, reminiscent of the radial orbit instability in spherical systems. Between these extremes, there is a range of axial ratios 0.305 less than or similar to b/a less than or similar to 0.570 for which the minimum streaming models appear to be stable.
C1 Univ Nacl Autonoma Mexico, IA, Observ Astron Nacl, Ensenada, Baja California, Mexico.
Univ Wisconsin, Washburn Observ, Madison, WI 53706 USA.
RP Levine, SE (reprint author), USN Observ, Flagstaff Stn, POB 1149, Flagstaff, AZ 86002 USA.
NR 39
TC 4
Z9 4
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 10
PY 1998
VL 503
IS 1
BP 125
EP 137
DI 10.1086/305985
PN 1
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 152KK
UT WOS:000077776400011
ER
PT J
AU Hix, WR
Khokhlov, AM
Wheeler, JC
Thielemann, FK
AF Hix, WR
Khokhlov, AM
Wheeler, JC
Thielemann, FK
TI The quasi-equilibrium-reduced alpha-network
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE methods : numerical; nuclear reactions, nucleosynthesis, abundances;
stars : evolution; supernovae : general
ID SILICON
AB An examination of the process of silicon burning, the burning stage that leads to the production of the iron peak nuclei, reveals that the nuclear evolution is dominated by large groups of nuclei in mutual equilibrium. These quasi-equilibrium (QSE) groups form well in advance of the global nuclear statistical equilibrium (NSE). We present an improved "minimal" nuclear network, which takes advantage of QSE in order to calculate the nuclear evolution and energy generation while further reducing the computational cost compared with a conventional alpha-chain network. During silicon burning the resultant QSE-reduced alpha-network is twice as fast as the full alpha-network it replaces and requires the tracking of only half as many abundance variables, without significant loss of accuracy. When the QSE-reduced alpha-network is used in combination with a conventional alpha-network stretching from He to Si, the combined network, which we call the alpha 7 network, provides an accurate approximation for all of the burning stages from He burning to NSE, while tracking only seven abundances. These reductions in computational cost and the number of species evolved make the alpha 7 network well suited for inclusion within hydrodynamic simulations, particularly those in multidimension.
C1 Univ Texas, Dept Astron, Austin, TX 78712 USA.
Naval Res Lab, Computat Phys & Fluid Dynam Lab, Washington, DC USA.
Univ Basel, Dept Phys & Astron, CH-4056 Basel, Switzerland.
RP Hix, WR (reprint author), Oak Ridge Natl Lab, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA.
RI Hix, William/E-7896-2011
OI Hix, William/0000-0002-9481-9126
NR 12
TC 25
Z9 25
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 10
PY 1998
VL 503
IS 1
BP 332
EP 343
DI 10.1086/305968
PN 1
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 152KK
UT WOS:000077776400028
ER
PT J
AU Feldman, U
Curdt, W
Doschek, GA
Schuhle, U
Wilhelm, K
Lemaire, P
AF Feldman, U
Curdt, W
Doschek, GA
Schuhle, U
Wilhelm, K
Lemaire, P
TI High-temperature lines in SUMER spectra recorded above a bright solar
active region
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE line : identifications; Sun : corona; Sun : UV radiation
ID EXPERIMENTAL LEVEL VALUES; ISOELECTRONIC SEQUENCE; FORBIDDEN LINES;
SPECTROMETER; CONFIGURATIONS; SOHO; DIAGNOSTICS; TELESCOPE; IONS
AB We identify spectral lines emitted by solar abundant elements due primarily to transitions within the 2s(2)2p(k) and 3s(2)3p(k) (where k = 1, 5) ground configurations of ions that are formed in ionization equilibrium between 2 x 10(6) and 8 x 10(6) K. The transitions were identified in spectra of a bright active region recorded 1997 September 6, by the Solar Ultraviolet Measurements of Emitted Radiation Spectrometer (SUMER) flown on the Solar and Heliospheric Observatory (SOHO). Some of these lines provide useful plasma diagnostic tools for measuring the physical conditions in the solar corona.
C1 USN, Res Lab, EO Hulburt Ctr Space Res, Washington, DC 20375 USA.
Max Planck Inst Aeron, D-37191 Katlenburg Lindau, Germany.
Univ Paris 11, Inst Astrophys Spatiale, Unite Mixte Ctr Natl Res Sci, F-91405 Orsay, France.
RP Feldman, U (reprint author), USN, Res Lab, EO Hulburt Ctr Space Res, Mail Code 7608,4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 25
TC 25
Z9 25
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 10
PY 1998
VL 503
IS 1
BP 467
EP 474
DI 10.1086/305966
PN 1
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 152KK
UT WOS:000077776400044
ER
PT J
AU Schumer, JW
Holloway, JP
AF Schumer, JW
Holloway, JP
TI Vlasov simulations using velocity-scaled hermite representations
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
DE Vlasov solvers; spectral methods
ID PLASMA; EQUATIONS; SPACE; TIME
AB The efficiency, accuracy, and stability of two different pseudo-spectral methods using scaled Hermite basis and weight functions, applied to the nonlinear Vlasov-Poisson equations in one dimension (1d-1v), are explored and compared. A variable velocity scale U is introduced into the Hermite basis and is shown to yield orders of magnitude reduction in errors, as compared to Linear kinetic theory, with no increase in workload, A set of Fourier-Hermite coefficients, representing a periodic Gaussian distribution function, are advanced through time with an O(Delta t(2))-accurate splitting method, Within this splitting scheme, the advection and acceleration terms of the Vlasov equation are solved separately using an O (all)-accurate Runge-Kutta method. The asymmetrically weighted (AW) Hermite basis, which has been used previously by many authors, conserves particles and momentum exactly and total energy to O (Delta t(3)); however, the AW Hermite method does not conserve the square integral of the distribution and is, in fact, numerically unstable. The symmetrically weighted (SW) Hermite algorithm, applied here to the Vlasov system for the first time, can either conserve particles and energy (for N-u even) or momentum (for N-u odd) as Delta t --> 0, where N, is the largest Hermite mode number. The SW Hermite method conserves the square integral of the distribution and, therefore, remains numerically stable. In addition, careful velocity scaling improves the conservation properties of the SW Hermite method. Damping and growth rates, oscillation frequencies, E-field saturation levels, and phase-space evolution are seen to be qualitatively correct during simulations. Relative errors with respect to linear Landau damping and linear bump-on-tail instability are shown to be less than 1% using only 64 velocity-scaled Hermite functions. Comparisons to particle-in-cell (PIC) simulations show that as the number of particles increases to more than 10(6), the PIC solutions converge to scaled SW Hermite solutions that were found in only 1/10 of the run-time. The SW Hermite method with velocity scaling is weil-suited to kinetic simulations of warm plasmas. (C) 1998 Academic Press.
C1 USN, Res Lab, Washington, DC 20375 USA.
Univ Michigan, Ann Arbor, MI 48109 USA.
RP Schumer, JW (reprint author), USN, Res Lab, Code 6770, Washington, DC 20375 USA.
RI Schumer, Joseph/D-7591-2013
NR 33
TC 37
Z9 37
U1 3
U2 7
PU ACADEMIC PRESS INC
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9991
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD AUG 10
PY 1998
VL 144
IS 2
BP 626
EP 661
DI 10.1006/jcph.1998.5925
PG 36
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 110MX
UT WOS:000075385900015
ER
PT J
AU Banin, U
Lee, CJ
Guzelian, AA
Kadavanich, AV
Alivisatos, AP
Jaskolski, W
Bryant, GW
Efros, AL
Rosen, M
AF Banin, U
Lee, CJ
Guzelian, AA
Kadavanich, AV
Alivisatos, AP
Jaskolski, W
Bryant, GW
Efros, AL
Rosen, M
TI Size-dependent electronic level structure of InAs nanocrystal quantum
dots: Test of multiband effective mass theory
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
AB The size dependence of the electronic spectrum of InAs nanocrystals ranging in radius from 10-35 Angstrom has been studied by size-selective spectroscopy. An eight-band effective mass theory of the quantum size levels has been developed which describes the observed absorption level structure and transition intensities very well down to smallest crystal size using bulk band parameters. This model generalizes the six-band model which works well in CdSe nanocrystals and should adequately describe most direct semiconductor nanocrystals with band edge at the Gamma-point of the Brillouin zone. (C) 1998 American Institute of Physics.
C1 Inst Fizyki UMK, Torun, Poland.
Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
USN, Res Lab, Nanostruct Opt Sect, Washington, DC 20375 USA.
RP Banin, U (reprint author), Hebrew Univ Jerusalem, Dept Phys Chem, IL-91904 Jerusalem, Israel.
RI Jaskolski, Wlodzimierz/D-1318-2014; Alivisatos , Paul /N-8863-2015
OI Jaskolski, Wlodzimierz/0000-0003-4814-1876; Alivisatos , Paul
/0000-0001-6895-9048
NR 16
TC 133
Z9 133
U1 0
U2 26
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD AUG 8
PY 1998
VL 109
IS 6
BP 2306
EP 2309
DI 10.1063/1.476797
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 107XW
UT WOS:000075237100032
ER
PT J
AU Buttrey, SE
AF Buttrey, SE
TI Nearest-neighbor classification with categorical variables
SO COMPUTATIONAL STATISTICS & DATA ANALYSIS
LA English
DT Article
DE optimal scaling; cross-validation; Fisher's criterion; choice of metric
ID TRANSFORMATIONS
AB A technique is presented for adopting nearest-neighbor classification to the case of categorical variables. The set of categories is mapped onto the real line in such a way as to maximize the ratio of total sum of squares to within-class sum of squares, aggregated over classes. The resulting real values then replace the categories, and nearest-neighbor classification proceeds with the Euclidean metric on these new values. Continuous variables can be included in this scheme with little added efort. This approach has been implemented in a computer program and tried on a number of data sets, with encouraging results.
Nearest-neighbor classification is a well-known and efective classification technique. With this scheme, an unknown item's distances to all known items are measured, and the unknown class is estimated by the class of the nearest neighbor or by the class most often represented among a set of nearest neighbors. This has proven effective in many examples, but an appropriate distance normalization is required when variables are scaled differently. For categorical variables "distance" is not even defined. In this paper categorical data values are replaced by real numbers in an optimal way: then those real numbers are used in nearest-neighbor classification (C) 1998 Elsevier Science B.V. All rights reserved.
C1 USN, Postgrad Sch, Dept Operat Res Sb, Monterey, CA 93943 USA.
EM buttrey@nps.navy.mil
NR 16
TC 6
Z9 6
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-9473
J9 COMPUT STAT DATA AN
JI Comput. Stat. Data Anal.
PD AUG 7
PY 1998
VL 28
IS 2
BP 157
EP 169
DI 10.1016/S0167-9473(98)00032-2
PG 13
WC Computer Science, Interdisciplinary Applications; Statistics &
Probability
SC Computer Science; Mathematics
GA 114VZ
UT WOS:000075631000003
ER
PT J
AU Aifer, EH
Bewley, WW
Felix, CL
Vurgaftman, I
Olafsen, LJ
Meyer, JR
Lee, H
Martinelli, RU
Connolly, JC
Sugg, AR
Olsen, G
AF Aifer, EH
Bewley, WW
Felix, CL
Vurgaftman, I
Olafsen, LJ
Meyer, JR
Lee, H
Martinelli, RU
Connolly, JC
Sugg, AR
Olsen, G
TI CW operation of 3.4 mu m optically-pumped type-II W laser to 220K
SO ELECTRONICS LETTERS
LA English
DT Article
ID DIODE-LASERS
AB An optically-pumped type-Il W laser emitting at 3.4 mu m operated CW up to 220 K, with a characteristic temperature of 51 K for the range 78-220 K. At 78 K, the output power was 90 mW from a 12 mu m wide stripe, and the differential power conversion efficiency was 2.9% per facet (uncoated).
C1 USN, Res Lab, Washington, DC 20375 USA.
Sarnoff Corp, Princeton, NJ USA.
Sensors Unlimited, Princeton, NJ USA.
RP Aifer, EH (reprint author), USN, Res Lab, Washington, DC 20375 USA.
RI Olafsen, Linda/G-4996-2013
NR 11
TC 8
Z9 9
U1 0
U2 2
PU IEE-INST ELEC ENG
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 0013-5194
J9 ELECTRON LETT
JI Electron. Lett.
PD AUG 6
PY 1998
VL 34
IS 16
BP 1587
EP 1588
DI 10.1049/el:19981136
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA 113LA
UT WOS:000075551400038
ER
PT J
AU Shlesinger, MF
AF Shlesinger, MF
TI Dynamics of complex systems
SO NATURE
LA English
DT Book Review
C1 Off Naval Res, Phys Sci Div 331, Arlington, VA 22217 USA.
RP Shlesinger, MF (reprint author), Off Naval Res, Phys Sci Div 331, 800 N Quincy St, Arlington, VA 22217 USA.
NR 1
TC 0
Z9 0
U1 0
U2 1
PU MACMILLAN MAGAZINES LTD
PI LONDON
PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW
SN 0028-0836
J9 NATURE
JI Nature
PD AUG 6
PY 1998
VL 394
IS 6693
BP 538
EP 538
PG 1
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 107YN
UT WOS:000075238700035
ER
PT J
AU Shlesinger, MF
AF Shlesinger, MF
TI Chaos theory tamed
SO NATURE
LA English
DT Book Review
C1 Off Naval Res, Phys Sci Div 331, Arlington, VA 22217 USA.
RP Shlesinger, MF (reprint author), Off Naval Res, Phys Sci Div 331, 800 N Quincy St, Arlington, VA 22217 USA.
NR 1
TC 0
Z9 0
U1 0
U2 1
PU MACMILLAN MAGAZINES LTD
PI LONDON
PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW
SN 0028-0836
J9 NATURE
JI Nature
PD AUG 6
PY 1998
VL 394
IS 6693
BP 538
EP 538
PG 1
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 107YN
UT WOS:000075238700034
ER
PT J
AU Krowne, CM
AF Krowne, CM
TI Marginal nonreciprocity in linear bi-isotropic media
SO MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
LA English
DT Article
DE bi-isotropic media; electromagnetic behavior; nonreciprocity and
reciprocity
ID ANISOTROPIC MEDIA
AB We examine die implications for Tellegen behavior of the classical electromagnetic fields by providing a derivation showing that nonreciprocity is not to be expected in ordinary chiral-like or bi-isotropic media. Nonreciprocal behavior will only be attained by combining the basically reciprocal chiral or bi-isotropic materials with known nonreciprocating media. (C) 1998 John Wiley & Sons, Inc.
C1 USN, Res Lab, Div Elect Sci & Technol, Microwave Technol Branch, Washington, DC 20375 USA.
RP Krowne, CM (reprint author), USN, Res Lab, Div Elect Sci & Technol, Microwave Technol Branch, Code 6850-3, Washington, DC 20375 USA.
NR 18
TC 2
Z9 2
U1 0
U2 1
PU JOHN WILEY & SONS INC
PI NEW YORK
PA 605 THIRD AVE, NEW YORK, NY 10158-0012 USA
SN 0895-2477
J9 MICROW OPT TECHN LET
JI Microw. Opt. Technol. Lett.
PD AUG 5
PY 1998
VL 18
IS 5
BP 356
EP 359
DI 10.1002/(SICI)1098-2760(19980805)18:5<356::AID-MOP15>3.0.CO;2-0
PG 4
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA 101PG
UT WOS:000074876900014
ER
PT J
AU Fatemi, M
Wickenden, AE
Koleske, DD
Twigg, ME
Freitas, JA
Henry, RL
Gorman, RJ
AF Fatemi, M
Wickenden, AE
Koleske, DD
Twigg, ME
Freitas, JA
Henry, RL
Gorman, RJ
TI Enhancement of electrical and structural properties of GaN layers grown
on vicinal-cut, a-plane sapphire substrates
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID SILICON; FILMS
AB We report the observation of significant enhancement in the electrical and crystalline properties of GaN layers grown on vicinally cut, a-plane sapphire substrates. Room-temperature Hall mobility and x-ray rocking curve data show a nearly twofold improvement, independent of the processing conditions, for layers grown on substrates having vicinal angles of 1.5 degrees compared to on-axis substrates. Transmission electron microscopy shows reduced edge dislocation density and better alignment of the grains in layers grown on vicinally cut substrates. Preliminary photoluminescence measurements also indicate pronounced differences in the yellow band spectra between the on-axis and off-axis cut substrates. These findings contrast the relatively modest improvements observed in layers grown on c-plane substrates with vicinal angles as high as 10 degrees.
C1 USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
RP Fatemi, M (reprint author), USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
EM fatemi@estd.nrl.navy.mil
NR 14
TC 32
Z9 32
U1 0
U2 8
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD AUG 3
PY 1998
VL 73
IS 5
BP 608
EP 610
DI 10.1063/1.121871
PG 3
WC Physics, Applied
SC Physics
GA 108CV
UT WOS:000075249200018
ER
PT J
AU Henderson, DR
AF Henderson, DR
TI The Commanding Heights
SO FORTUNE
LA English
DT Book Review
C1 Hoover Inst, Stanford, CA 94305 USA.
USN, Postgrad Sch, Monterey, CA USA.
RP Henderson, DR (reprint author), Hoover Inst, Stanford, CA 94305 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 USA
SN 0015-8259
J9 FORTUNE
JI Fortune
PD AUG 3
PY 1998
VL 138
IS 3
BP 48
EP +
PG 2
WC Business
SC Business & Economics
GA 100FX
UT WOS:000074806400017
ER
PT J
AU Burgher, SW
Tandy, TK
Dawdy, MR
AF Burgher, SW
Tandy, TK
Dawdy, MR
TI Transvaginal ultrasonography by emergency physicians decreases patient
time in the emergency department
SO ACADEMIC EMERGENCY MEDICINE
LA English
DT Article; Proceedings Paper
CT SAEM Annual Meeting
CY MAY, 1997
CL WASHINGTON, D.C.
SP SAEM
DE ultrasonography; pregnancy, ectopic; pregnancy, tubal; pregnancy
trimester, first; emergency medicine
ID ECTOPIC PREGNANCY; RISK; ULTRASOUND; SONOGRAPHY; DIAGNOSIS
AB Objectives: An important argument for emergency physician use of ultrasonography is that it results in more rapid patient disposition, but there are few articles to support this position. This study sought to demonstrate a significant decrease in the time spent in the ED when emergency physicians performed transvaginal ultrasonography (TVUS), as compared with when TVUS was performed by consultants, in the evaluation of first-trimester pelvic pain or vaginal bleeding. Methods: A retrospective analysis was conducted of the time spent in the ED (time placed in gynecologic examination room to time released from ED) by patients with first-trimester pelvic pain or vaginal bleeding necessitating further evaluation with TVUS. TVUS was performed in the ED by obstetrics/gynecology (ob/gyn) residents who were consulted to the ED from January 11, 1996, to March 31, 1996, and by emergency physicians from April 17, 1996, to July 7, 1996. Results: Emergency physicians evaluated 46 patients by TVUS, with a mean time of 164.70 minutes (SEM +/- 13.29). Ob/gyn consultants evaluated 38 patients by TVUS, with a mean time of 234.79 minutes (SEM +/- 12.74). This was a significant difference at the level of p < 0.0003 (Student's t-test). There were no known missed ectopic pregnancies as ascertained by 100% patient follow-up. There was no significant difference between the groups in the percentage of ectopic pregnancies (Fisher's exact test). The number of patients in the emergency physician group requiring subsequent consultation was reduced by 85%. Conclusions: This study demonstrates a more rapid ED transit time when TVUS was performed at the bedside by emergency physicians as compared with when pelvic ultrasonography required consultation. Additionally, fewer calls to consultants were required.
C1 USN, Med Ctr Portsmouth, Dept Emergency Med, Portsmouth, VA 23708 USA.
RP Burgher, SW (reprint author), USN, Med Ctr Portsmouth, Dept Emergency Med, Bldg 215,620 John Paul Jones Circle, Portsmouth, VA 23708 USA.
NR 20
TC 37
Z9 37
U1 1
U2 1
PU HANLEY & BELFUS INC
PI PHILADELPHIA
PA 210 S 13TH ST, PHILADELPHIA, PA 19107 USA
SN 1069-6563
J9 ACAD EMERG MED
JI Acad. Emerg. Med.
PD AUG
PY 1998
VL 5
IS 8
BP 802
EP 807
PG 6
WC Emergency Medicine
SC Emergency Medicine
GA 109VR
UT WOS:000075345100009
PM 9715242
ER
PT J
AU Holmboe, E
Scranton, R
Sumption, K
Hawkins, R
AF Holmboe, E
Scranton, R
Sumption, K
Hawkins, R
TI Effect of medical record audit and feedback on residents' compliance
with preventive health care guidelines
SO ACADEMIC MEDICINE
LA English
DT Article
ID OUTPATIENT
AB Purpose. To examine the effect on residents' compliance with preventive health guidelines of an intensive quality improvement program using medical record audits and individualized feedback.
Method. The before-and-after study was set in a general internal medicine clinic at a military teaching hospital. In 1995, the authors retrospectively reviewed 280 medical records to determine whether, after the hospital had started an audit-and-feedback program in 1994, residents' compliance rates had risen for preventive health interventions. The study looked at both audited and non-audited interventions.
Results. The residents' compliance rates significantly im proved for the audited interventions (tetanus immunization, breast examination, and rectal examination). They also had higher compliance rates for six of the seven non-audited interventions.
Conclusions. An intensive medical record audit with individualized feedback can produce exceptionally high levels of compliance with preventive care practices among internal medicine residents. Furthermore, the improved compliance is generalizable to other health care measures not directly targeted for audit.
C1 Yale Univ, Sch Med, Robert Wood Johnson Clin Scholars Program, New Haven, CT 06520 USA.
USN, Med Ctr, Dept Internal Med, Portsmouth, VA USA.
Uniformed Serv Univ Hlth Sci, F Edward Hebert Sch Med, Dept Internal Med, Bethesda, MD 20814 USA.
RP Holmboe, E (reprint author), Yale Univ, Sch Med, Robert Wood Johnson Clin Scholars Program, IE-61 SHM,POB 208025, New Haven, CT 06520 USA.
NR 6
TC 30
Z9 30
U1 0
U2 0
PU HANLEY & BELFUS INC
PI PHILADELPHIA
PA 210 S 13TH ST, PHILADELPHIA, PA 19107 USA
SN 1040-2446
J9 ACAD MED
JI Acad. Med.
PD AUG
PY 1998
VL 73
IS 8
BP 901
EP 903
DI 10.1097/00001888-199808000-00016
PG 3
WC Education, Scientific Disciplines; Health Care Sciences & Services
SC Education & Educational Research; Health Care Sciences & Services
GA 111AG
UT WOS:000075414700020
PM 9736851
ER
PT J
AU Lawson, BD
Mead, AM
AF Lawson, BD
Mead, AM
TI The sopite syndrome revisited: Drowsiness and mood changes during real
or apparent motion
SO ACTA ASTRONAUTICA
LA English
DT Article
ID SICKNESS; FATIGUE; CREWS
AB The sopite syndrome is a poorly understood response to motion. Drowsiness and mood changes are the primary characteristics of the syndrome. The sopite syndrome can exist in isolation from more apparent symptoms such as nausea, can last long after nausea has subsided, and can debilitate some individuals. It is most likely a distinct syndrome from "regular" motion sickness or common fatigue, and is of potential concern in a variety of situations. The syndrome may be particularly hazardous in transportation settings where other performance challenges (e.g., sleep deprivation) are already present. It is also a potential concern in cases where illnesses such as sleep disorders or depression may interact with the syndrome and confuse diagnosis. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
C1 USN, Aerosp Med Res Lab, Pensacola, FL 32508 USA.
RP Lawson, BD (reprint author), USN, Aerosp Med Res Lab, 51 Hovey Rd, Pensacola, FL 32508 USA.
FU NCI NIH HHS [CB701]
NR 59
TC 31
Z9 31
U1 1
U2 2
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0094-5765
J9 ACTA ASTRONAUT
JI Acta Astronaut.
PD AUG-SEP
PY 1998
VL 43
IS 3-6
BP 181
EP 192
DI 10.1016/S0094-5765(98)00153-2
PG 12
WC Engineering, Aerospace
SC Engineering
GA 121CE
UT WOS:000075993900010
PM 11541923
ER
PT J
AU Limjoco, UR
Grubbs, JM
Thomas, MD
AF Limjoco, UR
Grubbs, JM
Thomas, MD
TI Richter's hernia with bowel perforation
SO AMERICAN FAMILY PHYSICIAN
LA English
DT Letter
C1 USN Hosp, Marine Corps Air Ground Combat Ctr, Twentynine Palms, CA 92278 USA.
RP Limjoco, UR (reprint author), USN Hosp, Marine Corps Air Ground Combat Ctr, Box 788250, Twentynine Palms, CA 92278 USA.
NR 4
TC 1
Z9 2
U1 0
U2 0
PU AMER ACAD FAMILY PHYSICIANS
PI KANSAS CITY
PA 8880 WARD PARKWAY, KANSAS CITY, MO 64114-2797 USA
SN 0002-838X
J9 AM FAM PHYSICIAN
JI Am. Fam. Physician
PD AUG
PY 1998
VL 58
IS 2
BP 352
EP +
PG 2
WC Primary Health Care; Medicine, General & Internal
SC General & Internal Medicine
GA 107WP
UT WOS:000075234200005
PM 9713392
ER
PT J
AU Schneider, CS
Ertel, JP
AF Schneider, CS
Ertel, JP
TI A classroom jumping ring
SO AMERICAN JOURNAL OF PHYSICS
LA English
DT Article
AB We present the design of a compact alternating current jumping ring apparatus which can electromagnetically launch conducting rings across a classroom. Jump energy and height are calculated for core and thin ring length, radius, thickness, and material. The effects of core saturation, permeability, hysteresis and demagnetizing field, ring shielding, and convective derivative are described. Rings with even small phase lag can pass by the magnetic pole of the primary in one-quarter of a cycle. Large ring size relative to skin depth delays the ring current close to the 180 deg of Lent's law. Contactless jump height measurement enables ring resistivity determination. Demonstrating the effects of voltage, frequency, conductivity, permeability, and geometry contributes to understanding electromagnetism in the classroom. (C) 1998 American Association of Physics Teachers.
C1 USN Acad, Dept Phys, Annapolis, MD 21402 USA.
RP Schneider, CS (reprint author), USN Acad, Dept Phys, Annapolis, MD 21402 USA.
NR 12
TC 10
Z9 10
U1 1
U2 6
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0002-9505
J9 AM J PHYS
JI Am. J. Phys.
PD AUG
PY 1998
VL 66
IS 8
BP 686
EP 692
DI 10.1119/1.18933
PG 7
WC Education, Scientific Disciplines; Physics, Multidisciplinary
SC Education & Educational Research; Physics
GA 103GD
UT WOS:000075148800016
ER
PT J
AU Yavorski, CC
Greason, KL
Egan, MC
AF Yavorski, CC
Greason, KL
Egan, MC
TI Splenic cysts: A new approach to partial splenectomy case report and
review of the literature
SO AMERICAN SURGEON
LA English
DT Article
ID SPLEEN; MANAGEMENT
AB Cysts of the spleen are rare entities and can be classified as either primary or secondary depending on the presence of a true epithelial lining. We report such a case in a young woman who presented with a symptomatic primary splenic cyst that was located in the lower pole of the spleen. We performed a partial splenectomy using a TA-90 stapler. The stapler provided excellent hemostasis and represents a convenient and safe technique for a resection. We recommend employment of this technique when faced with a similar ease.
C1 USN, Med Ctr, Dept Clin Invest, San Diego, CA 92134 USA.
USN, Med Ctr, Dept Gen Surg, San Diego, CA 92134 USA.
Univ Kentucky, Dept Surg, Div Vasc Surg, Lexington, KY USA.
RP Yavorski, CC (reprint author), USN, Med Ctr, Dept Clin Invest, 34800 Bob Wilson Dr, San Diego, CA 92134 USA.
NR 11
TC 10
Z9 14
U1 0
U2 0
PU SOUTHEASTERN SURGICAL CONGRESS
PI ATLANTA
PA 141 WEST WIEUCA RD, STE B100, ATLANTA, GA 30342 USA
SN 0003-1348
J9 AM SURGEON
JI Am. Surg.
PD AUG
PY 1998
VL 64
IS 8
BP 795
EP 798
PG 4
WC Surgery
SC Surgery
GA 104ND
UT WOS:000075019900030
PM 9697917
ER
PT J
AU Soni, MH
Callahan, JH
McElvany, SW
AF Soni, MH
Callahan, JH
McElvany, SW
TI Laser desorption - Membrane introduction mass spectrometry
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID VOLATILE ORGANIC-COMPOUNDS; FLOW-INJECTION ANALYSIS; PER-TRILLION
LEVELS; AROMATIC-HYDROCARBONS; ION-SOURCE; ONLINE; INLET; WATER; AIR;
INTERFACE
AB In this paper we describe the first use of laser desorption in conjunction with membrane introduction mass spectrometry (MIMS). In this technique, a low-powered carbon dioxide laser is used to irradiate the low-pressure (vacuum) side of a silicone membrane during a typical MIMS analysis of an aqueous solution. The absorption of laser energy results in direct membrane heating and rapid desorption of permeate molecules. This improves both the sensitivity and response times of MIMS when analyzing compounds having high molecular weight and low volatility. Two simple interfaces are described for performing laser desorption inside and outside the vacuum manifold of a GCQ ion trap mass spectrometer. Together with now injection (FI) sample introduction, we demonstrate direct on-line monitoring of;aqueous Solutions of high boding point (200-530 degrees C) polynuclear aromatic hydrocarbons such as naphthalene, anthracene, pyrene, benzo[b]fluoranthene, and indeno[123-cd]pyrene.
C1 USN, Res Lab, Analyt Chem Sect, Washington, DC 20375 USA.
RP USN, Res Lab, Analyt Chem Sect, Code 6113, Washington, DC 20375 USA.
NR 53
TC 41
Z9 41
U1 1
U2 4
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
EI 1520-6882
J9 ANAL CHEM
JI Anal. Chem.
PD AUG 1
PY 1998
VL 70
IS 15
BP 3103
EP 3113
DI 10.1021/ac980436l
PG 11
WC Chemistry, Analytical
SC Chemistry
GA 107VQ
UT WOS:000075232000011
PM 21644650
ER
PT J
AU Lodha, GS
Yamashita, K
Kunieda, H
Tawara, Y
Yu, J
Namba, Y
Bennett, JM
AF Lodha, GS
Yamashita, K
Kunieda, H
Tawara, Y
Yu, J
Namba, Y
Bennett, JM
TI Effect of surface roughness and subsurface damage on grazing-incidence
x-ray scattering and specular reflectance
SO APPLIED OPTICS
LA English
DT Article
ID OPTICAL-CONSTANTS; ALUMINUM FILMS; REFLECTIVITY; MIRRORS
AB Grazing-incidence specular reflectance and near-specular scattering were measured at AI-K, (1.486-keV, 8.34-Angstrom) radiation an uncoated dielectric substrates whose surface topography had been measured with a scanning probe microscope and a mechanical profiler. Grazing-incidence specular reflectance was also measured on selected substrates at the Cu-K-alpha (8.047-keV, 1.54-Angstrom) wavelength. Substrates included superpolished and conventionally polished fused silica; SiO2 wafers; superpolished and precision-ground Zerodur; conventionally polished, float-polished, and precision-ground BK-7 glass; and superpolished and precision-ground silicon carbide. Roughnesses derived from x-ray specular reflectance and scattering measurements mere in good agreement with topographic roughness values measured with a scanning probe microscope (atomic force microscope) and a mechanical profiler that included similar ranges of surface spatial wavelengths. The specular reflectance was also found to be sensitive to the density of polished surface layers and subsurface damage down to the penetration depth of the x rays. Density gradients and subsurface damage were found in the superpolished fused-silica and precision-ground Zerodur samples. These results suggest that one can nondestructively evaluate subsurface damage in transparent materials using grazing-incidence x-ray specular reflectance in the 1.5-8-keV range. (C) 1998 Optical Society of America.
C1 Nagoya Univ, Dept Phys, Chikusa Ku, Nagoya, Aichi 46401, Japan.
Chubu Univ, Dept Mech Engn, Kasugai, Aichi 487, Japan.
USN, Air Warfare Ctr, China Lake, CA 93555 USA.
RP Lodha, GS (reprint author), Ctr Adv Technol, Indore 452013, India.
NR 27
TC 21
Z9 22
U1 1
U2 10
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0003-6935
J9 APPL OPTICS
JI Appl. Optics
PD AUG 1
PY 1998
VL 37
IS 22
BP 5239
EP 5252
DI 10.1364/AO.37.005239
PG 14
WC Optics
SC Optics
GA 106AJ
UT WOS:000075107300030
PM 18286003
ER
PT J
AU Aglitskiy, Y
Lehecka, T
Obenschain, S
Bodner, S
Pawley, C
Gerber, K
Sethian, J
Brown, CM
Seely, J
Feldman, U
Holland, G
AF Aglitskiy, Y
Lehecka, T
Obenschain, S
Bodner, S
Pawley, C
Gerber, K
Sethian, J
Brown, CM
Seely, J
Feldman, U
Holland, G
TI High-resolution monochromatic x-ray imaging system based on spherically
bent crystals
SO APPLIED OPTICS
LA English
DT Article
ID DENSITY PLASMA DIAGNOSTICS; LASER-PRODUCED PLASMAS; RADIOGRAPHY; FOILS;
SPECTROSCOPY; IRRADIATION; INCOHERENCE; EMISSION; PROFILES; TARGETS
AB We have developed an improved x-ray imaging system based on spherically curved crystals. It is designed and used for diagnostics of targets ablatively accelerated by the Nike KrF laser. A spherically curved quartz crystal (2d = 6.687 Angstrom, R = 200 mm) has been used to produce monochromatic backlit images with the He-like Si resonance line (1865 eV) as the source of radiation. The spatial resolution of the x-ray optical system is 1.7 mu m in selected places and 2-3 mu m over a larger area. Time-resolved backlit monochromatic images of polystyrene planar targets driven by the Nike facility have been obtained with a spatial resolution of 2.5 mu m in selected places and 5 mu m over the focal spot of the Nike laser. (C) 1998 Optical Society of America.
C1 Sci Applicat Int Corp, Mclean, VA 22102 USA.
USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
SFA Inc, Landover, MD 20785 USA.
RP Aglitskiy, Y (reprint author), Sci Applicat Int Corp, Mclean, VA 22102 USA.
NR 38
TC 68
Z9 74
U1 0
U2 8
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0003-6935
J9 APPL OPTICS
JI Appl. Optics
PD AUG 1
PY 1998
VL 37
IS 22
BP 5253
EP 5261
DI 10.1364/AO.37.005253
PG 9
WC Optics
SC Optics
GA 106AJ
UT WOS:000075107300031
PM 18286004
ER
PT J
AU Seaver, M
Roselle, DC
Pinto, JF
Eversole, JD
AF Seaver, M
Roselle, DC
Pinto, JF
Eversole, JD
TI Absolute emission spectra from Bacillus subtilis and Escherichia coli
vegetative cells in solution
SO APPLIED OPTICS
LA English
DT Article
ID DECAY CHARACTERISTICS; STEADY-STATE; FLUORESCENCE; BACTERIA;
IDENTIFICATION
AB Spectrally resolved emission (270-560 Mn) from dilute suspensions of washed Bacillus subtilis and Escherichia coli were measured by use of tunable laser excitation between 270 and 300 nm. Integrated absolute emission cross sections increase with decreasing excitation wavelength and range from 1.8 x 10(-12) to 6.0 x 10(-11) cm(2)/(particle sr). An emission band near 340 nm dominates all observed spectra. At each excitation wavelength spectrally resolved emissions from the E. coli and B. subtilis suspensions are indistinguishable.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Seaver, M (reprint author), USN, Res Lab, Code 5610,4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 23
TC 24
Z9 24
U1 0
U2 8
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0003-6935
J9 APPL OPTICS
JI Appl. Optics
PD AUG 1
PY 1998
VL 37
IS 22
BP 5344
EP 5347
DI 10.1364/AO.37.005344
PG 4
WC Optics
SC Optics
GA 106AJ
UT WOS:000075107300043
PM 18286016
ER
PT J
AU Rosen, DL
Lambrakos, SG
AF Rosen, DL
Lambrakos, SG
TI Modulated reflectance analysis of complex surface structures
SO APPLIED SPECTROSCOPY
LA English
DT Article
DE response; window; reflectivity; electroreflectivity; plasmon; nonlocal
ID SILVER
AB An analytical approach is presented for correlating modulated reflectance spectra and complex surface structure. A response function is constructed of specular reflectance from metal surfaces that are both rough and spatially dispersive. The method of analysis is based on a response function formulation that entails a windowing operation. This windowing operation is not ad hoc and is theoretically well founded for providing a statistical interpretation of the permittivity function. The initial analysis indicates that the windowing operation provides for a robust formulation that is conveniently adaptable to a wide range of frequencies, spanning regimes characterized by different response characteristics. A prototype case using this windowed response function formulation is applied to the electroreflectivity spectra, from 1.5 to 4.5 eV, of roughened silver electrodes. The electrode is modeled by a two-interface system as the basis of a parameterization of experimentally measured response functions, which are partitioned into reflectivity and transparent regimes by the windowing operation. The bulk plasmons and defect polaritons are characterized by our robust formulation. In addition, we present a discussion of the general significance of our approach with respect to the application of statistical pattern recognition to the analysis of modulated reflectivity data.
C1 USA, Res Lab, Battlefield Environm Directorate, Adelphi, MD 20783 USA.
USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA.
RP Rosen, DL (reprint author), USA, Res Lab, Battlefield Environm Directorate, Adelphi, MD 20783 USA.
NR 17
TC 0
Z9 0
U1 0
U2 1
PU SOC APPLIED SPECTROSCOPY
PI FREDERICK
PA 201B BROADWAY ST, FREDERICK, MD 21701 USA
SN 0003-7028
J9 APPL SPECTROSC
JI Appl. Spectrosc.
PD AUG
PY 1998
VL 52
IS 8
BP 1053
EP 1061
DI 10.1366/0003702981944940
PG 9
WC Instruments & Instrumentation; Spectroscopy
SC Instruments & Instrumentation; Spectroscopy
GA 115TQ
UT WOS:000075681900005
ER
PT J
AU Canaan, T
D'Alesandro, MM
Miller, GA
AF Canaan, T
D'Alesandro, MM
Miller, GA
TI Cytokine production by cryopreserved human peripheral blood mononuclear
cells in response to periodontal pathogens
SO ARCHIVES OF ORAL BIOLOGY
LA English
DT Article
DE cytokine; cryopreserved; lymphocyte; periodontal; mononuclear cell
ID SURFACE-MARKERS; SUPERANTIGEN
AB Freezing techniques provide a way of repeating and extending immunological assays by using frozen portions of an individual's peripheral blood mononuclear cell fraction. Earlier work shows that the lymphocytes that are stored frozen retain their ability to respond to polyclonal B-cell activators, mitogens, superantigens and bacterial extracts of oral interest. These studies extend previous findings by determining cytokine production by lymphocytes following frozen storage for up to 24 weeks. Production of interleukin (IL)-1 beta, IL-2, IL-6, and tumour necrosis factor (TNF)-beta by stimulated lymphocytes after cyropreservation was not significantly different from those responses before storage, with one exception: IL-6 production was negligible after 24 weeks' frozen storage when thawed cells were cocultured with pokeweed mitogen. After stimulation with extracts from Porphyromonas gingivalis and Actinobacillus actinomycetemcomitans, the proliferative capacity of the frozen cells was maintained as well as the production of IL-1 beta, IL-2, and IL-6. TNF-beta was not produced in response to bacterial antigen stimulation. The ability of peripheral blood mononuclear cells to retain functional activity after frozen storage should permit more effective monitoring during longitudinal clinical studies and a better evaluation of changes in cytokine production in patients with advanced periodontitis both during and after treatment. (C) 1998 Elsevier Science Ltd. All rights reserved.
C1 Geocenters Inc, Ft Washington, MD 20744 USA.
USN, Sch Dent, Natl Naval Dent Ctr, Bethesda, MD 20814 USA.
USN, Dent Res Inst Detachment, Bethesda, MD 20889 USA.
RP Miller, GA (reprint author), Geocenters Inc, Ft Washington, MD 20744 USA.
NR 23
TC 2
Z9 2
U1 1
U2 2
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0003-9969
J9 ARCH ORAL BIOL
JI Arch. Oral Biol.
PD AUG
PY 1998
VL 43
IS 8
BP 657
EP 664
DI 10.1016/S0003-9969(98)00053-3
PG 8
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA 115UF
UT WOS:000075683300009
PM 9758049
ER
PT J
AU Stuart, SM
Nowicki, MJ
AF Stuart, SM
Nowicki, MJ
TI Radiological case of the month - Cat-scratch disease with hepatic and
splenic involvement
SO ARCHIVES OF PEDIATRICS & ADOLESCENT MEDICINE
LA English
DT Article
ID GRANULOMATOUS HEPATITIS; ROCHALIMAEA-HENSELAE; IMAGING FEATURES; UNKNOWN
ORIGIN; FEVER; ADENOPATHY; CHILDREN; LESIONS
C1 Natl Naval Med Ctr, Div Gastroenterol, Dept Pediat, Portsmouth, VA 23708 USA.
Natl Naval Med Ctr, Div Pediat Gastroenterol, Dept Pediat, Portsmouth, VA 23708 USA.
RP Nowicki, MJ (reprint author), Natl Naval Med Ctr, Div Gastroenterol, Dept Pediat, 620 John Paul Jones Cir, Portsmouth, VA 23708 USA.
NR 17
TC 3
Z9 3
U1 0
U2 0
PU AMER MEDICAL ASSOC
PI CHICAGO
PA 515 N STATE ST, CHICAGO, IL 60610 USA
SN 1072-4710
J9 ARCH PEDIAT ADOL MED
JI Arch. Pediatr. Adolesc. Med.
PD AUG
PY 1998
VL 152
IS 8
BP 823
EP 824
PG 2
WC Pediatrics
SC Pediatrics
GA 106JQ
UT WOS:000075126500025
PM 9701150
ER
PT J
AU Worley, CE
Mason, BD
AF Worley, CE
Mason, BD
TI Micrometer measures of double stars
SO ASTRONOMICAL JOURNAL
LA English
DT Review
DE binaries : close; binaries : visual
ID VISUAL DOUBLE STARS; ORBITAL ELEMENTS; SPECKLE INTERFEROMETRY; BINARY
STARS; SYSTEMS; PAIRS; WDS
AB Micrometer measures of 795 double stars made with the 26 inch (0.66 m) refractor of the US Naval Observatory from 1984 to 1990 are presented.
C1 USN Observ, Washington, DC 20392 USA.
RP Worley, CE (reprint author), USN Observ, 3450 Massachusetts Ave NW, Washington, DC 20392 USA.
NR 136
TC 0
Z9 0
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 5801 S ELLIS AVENUE, CHICAGO, IL 60637 USA
SN 0004-6256
J9 ASTRON J
JI Astron. J.
PD AUG
PY 1998
VL 116
IS 2
BP 917
EP 930
DI 10.1086/300475
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 115CW
UT WOS:000075646800031
ER
PT J
AU Dyck, HM
van Belle, GT
Thompson, RR
AF Dyck, HM
van Belle, GT
Thompson, RR
TI Radii and effective temperatures for K and M giants and supergiants. II.
SO ASTRONOMICAL JOURNAL
LA English
DT Article
DE stars : fundamental parameters; stars : late-type
ID ANGULAR DIAMETERS; MICHELSON INTERFEROMETRY; CATALOG; COOLER; STARS
AB We present new interferometric observations for 74 luminous red stars, made in the near-infrared. We show that our 2.2 mu m uniform-disk diameters agree with other near-infrared diameter determinations (lunar occultations and interferometers) for 22 stars measured in common with ours. From our new data, we derive effective temperatures that are compared with our previous work and with comparable observations made by lunar occultations at Kitt Peak. The combined data set yields 91 luminosity class II, II-III, and III stars that have well-determined spectral types spanning the range from about K0 to about M8. There are 83 stars in the sample that define an approximately linear relationship between spectral type and effective temperature for giants, with a dispersion of 192 K at each spectral type. Eight of the stars have temperatures that are roughly 750 K too low for their spectral types. These stars are not known to be at the high-luminosity end of the range of stars observed and are not recognized as binary stars. At present, we have no explanation for their low effective temperatures. We also show that Hipparcos parallaxes, combined with our angular diameters, yield linear radii precise enough to see differences in the average radius between luminosity class II and luminosity class III stars.
C1 USN Observ, Dept Astrometry, Navy Prototype Opt Interferometer, Flagstaff, AZ 86001 USA.
CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
Univ Wyoming, Dept Phys & Astron, Laramie, WY 82071 USA.
RP Dyck, HM (reprint author), USN Observ, Dept Astrometry, Navy Prototype Opt Interferometer, Rural Route 14,Box 447, Flagstaff, AZ 86001 USA.
EM meldyck@sextans.lowell.edu; gerard@huey.jpl.nasa.gov;
thompson@sparky.uwyo.edu
NR 21
TC 93
Z9 93
U1 0
U2 3
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 5801 S ELLIS AVENUE, CHICAGO, IL 60637 USA
SN 0004-6256
J9 ASTRON J
JI Astron. J.
PD AUG
PY 1998
VL 116
IS 2
BP 981
EP 986
DI 10.1086/300453
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 115CW
UT WOS:000075646800036
ER
PT J
AU Canzian, B
AF Canzian, B
TI Extensive spiral structure and corotation resonance
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies : kinematics and dynamics; galaxies : spiral; galaxies :
structure
ID PISCES-PERSEUS SUPERCLUSTER; H-I OBSERVATIONS; LARGE-SCALE STRUCTURE; 21
CM SURVEY; NEUTRAL HYDROGEN; STAR-FORMATION; CANCER CLUSTER; DISK
GALAXIES; 21-CM SURVEY; GAS
AB Spiral density wave theories demand that grand-design spiral structure be bounded, at most, between the inner and outer Lindblad resonances of the spiral pattern. The corotation resonance lies between the outer and the inner Lindblad resonances. The locations of the resonances are at radii whose ratios to each other are rather independent of the shape of the rotation curve. The measured ratio of outer to inner extent of spiral structure for a given spiral galaxy can be compared to the standard ratio of corotation to inner Lindblad resonance radius. In the case that the measured ratio far exceeds the standard ratio, it is likely that the corotation resonance is within the bright optical disk. Studying such galaxies can teach us how the action of resonances sculpts the appearance of spiral disks. This paper reports observations of 140 disk galaxies, leading to resonance ratio tests for 109 qualified spiral galaxies. It lists candidates that have a good chance of having the corotation resonance radius within the bright optical disk.
C1 USN Observ, Univ Space Res Assoc, Flagstaff, AZ 86002 USA.
Space Telescope Sci Inst, Baltimore, MD 21218 USA.
RP Canzian, B (reprint author), USN Observ, Univ Space Res Assoc, POB 1149, Flagstaff, AZ 86002 USA.
NR 64
TC 12
Z9 13
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 1998
VL 502
IS 2
BP 582
EP 597
DI 10.1086/305912
PN 1
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 152KF
UT WOS:000077776000007
ER
PT J
AU Feldman, U
Brown, CM
Laming, JM
Seely, JF
Doschek, GA
AF Feldman, U
Brown, CM
Laming, JM
Seely, JF
Doschek, GA
TI A compact spectral range and matching extreme-ultraviolet spectrometer
for the simultaneous study of 1 x 10(4)-2 x 10(7) K solar plasmas
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE instrumentation : spectrographs; Sun : chromosphere; Sun : flares; Sun :
UV radiation
ID ELECTRON-IMPACT EXCITATION; FINE-STRUCTURE TRANSITION; BORON-LIKE IONS;
O-IV; RATE COEFFICIENTS; ATOMIC DATA; ATMOSPHERE; SUMER; LINE; EMISSION
AB An EUV spectral range of less than 100 Angstrom in first order has been found that includes sufficient spectral lines and critical combinations of lines in first and second order to permit dynamic and diagnostic investigations of the solar atmosphere with a relatively simple spectrometer. An optical design of such a spectrometer, based on the performance of the Solar Ultraviolet Measurements of Emitted Radiation (SUMER) spectrometer on the Solar and Heliospheric Observatory (SOHO) spacecraft, and sample stigmatic solar spectra for the range 1334-1428 Angstrom from SUMER are presented to illustrate the utility of this range. Lines of almost all abundant solar elements except H and He are present within this wavelength band in first or second order. The lines cover the large temperature range from 1 x 10(4) K (chromosphere) to 2 x 10(7) K (flares). The spectrometer's resolution is sufficiently high to permit measuring line profiles and wavelength shifts which allows plasma dynamical studies of individual solar structures from the chromosphere up into the corona. In addition, electron density diagnostics are available within the spectral range that cover the temperature range from 8 x 10(4) to 1 x 10(6) K and an electron density range from 10(8) to 10(13) cm(-3).
C1 USN, Res Lab, EO Hulburt Ctr Space Res, Washington, DC 20375 USA.
Sachs Freeman Associates Inc, Largo, MD 20774 USA.
RP Feldman, U (reprint author), USN, Res Lab, EO Hulburt Ctr Space Res, 4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 28
TC 3
Z9 3
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 1998
VL 502
IS 2
BP 997
EP 1005
DI 10.1086/305931
PN 1
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 152KF
UT WOS:000077776000039
ER
PT J
AU Antiochos, SK
AF Antiochos, SK
TI The magnetic topology of solar eruptions
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE MHD; Sun : flares; Sun : magnetic fields; Sun : prominences
ID FIELD; CONFIGURATIONS; ENERGY; LINES; SHEAR
AB We present an explanation for the well-known observation that complexity of the solar magnetic field is a necessary ingredient for strong activity such as large eruptive flares. Our model starts with the standard picture for the energy buildup-a highly sheared, newly emerged magnetic field near the photospheric neutral line held down by an overlying unsheared held. Previously, we proposed the key new idea that magnetic reconnection between the unsheared field and neighboring flux systems decreases the amount of the overlying field and, thereby, allows the low-lying sheared flux to "break out." In this Letter, we show that a bipolar active region does not have the necessary complexity for this process to occur, but a delta sunspot has the right topology for magnetic breakout. We discuss the implications of these results for observations from SOHO and TRACE.
C1 USN, EO Hulburt Ctr Space Res, Res Lab, Washington, DC 20375 USA.
RP Antiochos, SK (reprint author), USN, EO Hulburt Ctr Space Res, Res Lab, Washington, DC 20375 USA.
RI Antiochos, Spiro/D-4668-2012
OI Antiochos, Spiro/0000-0003-0176-4312
NR 13
TC 161
Z9 164
U1 1
U2 5
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 5720 SOUTH WOODLAWN AVE, CHICAGO, IL 60637-1603 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD AUG 1
PY 1998
VL 502
IS 2
BP L181
EP L184
DI 10.1086/311507
PN 2
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 152KH
UT WOS:000077776200019
ER
PT J
AU Fajardo, AB
Luke, BL
Grant, JW
AF Fajardo, AB
Luke, BL
Grant, JW
TI A technique for determining convergence in human subjects undergoing
rotational acceleration using a binocular eye-tracking system
SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE
LA English
DT Article; Proceedings Paper
CT Aerospace-Medical-Association 67th Annual Meeting
CY MAY 08, 1996
CL ATLANTA, GEORGIA
SP Aerosp Med Assoc
AB Background: This report describes the measurement of convergent eye movements and calculation of the spatial convergence point from the angular eye position data. These measurements were made in the dark while the subject experienced inertial motion aboard a centrifuge. This was an exploratory experiment with the goal of evaluating the eyes' convergence in the dark, and to see if this convergence point is dependent on inertial motion. Methods: The subject was rotated in the dark on NAMRL's Coriolis Acceleration Platform in Pensacola, FL. The pupil positions were tracked by two helmet-mounted infrared cameras connected to a computer-controlled data acquisition system. We used the position data to calculate the angles through which the eyes rotated, and then applied trigonometric principles to construct the line of sight for each eye for any instant: in time. The intersection of these two lines of sight was the convergence point. Results: With the binocular eye-tracking system, we could accurately determine an accelerating subject's convergence point to within 10%, if the point was less than 1.5 m away from the subject. At convergence distances greater than 1.5 m, the angular movements of the two eyes became so small that determining a convergence point was difficult.
C1 Virginia Polytech Inst & State Univ, Dept Engn Sci & Mech, Blacksburg, VA 24061 USA.
USN, Aerosp Med Res Lab, Pensacola, FL USA.
RP Grant, JW (reprint author), Virginia Polytech Inst & State Univ, Dept Engn Sci & Mech, Blacksburg, VA 24061 USA.
NR 9
TC 2
Z9 2
U1 0
U2 2
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 0095-6562
J9 AVIAT SPACE ENVIR MD
JI Aviat. Space Environ. Med.
PD AUG
PY 1998
VL 69
IS 8
BP 750
EP 754
PG 5
WC Public, Environmental & Occupational Health; Medicine, General &
Internal; Sport Sciences
SC Public, Environmental & Occupational Health; General & Internal
Medicine; Sport Sciences
GA 106WT
UT WOS:000075174600004
PM 9715962
ER
PT J
AU Feeks, EF
Maino, TJ
Proctor, JG
Bower, EA
AF Feeks, EF
Maino, TJ
Proctor, JG
Bower, EA
TI An abscess that wasn't: Renal calyceal diverticulum in a student naval
aviator
SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE
LA English
DT Article
ID SHOCK-WAVE LITHOTRIPSY; PYELOCALICEAL DIVERTICULA; CALICEAL DIVERTICULA;
MANAGEMENT; RUPTURE
AB The authors report a case of a 24-yr-old female Navy student pilot who presented with pyelonephritis, and on workup, was found to have two diverticula arising from calyces in her left kidney. Her infection resolved after several weeks of antibiotic therapy. She was granted a waiver to return to flight status based on the judgment that her risk of recurrent infection, sudden incapacitation, future need of surgery, and compromise of mission effectiveness were acceptably low. She has remained asymptomatic after more than 48 mo of follow-up. Renal calyceal diverticulum has not previously been discussed in the literature of aerospace medicine. The definition, anatomy, possible etiologies, epidemiology, presentation, treatment options, and aeromedical disposition, including human-machine interface issues, for calyceal diverticula are discussed. Aviators with calyceal diverticula are at increased risk of urinary tract infection and other complications; aeromedical disposition should rest on evaluation of such risk on a case-by-case basis.
C1 USN, Training Air Wing FIVE, Whiting Field, FL USA.
Univ Colorado, Sch Med, Boulder, CO 80309 USA.
USN Hosp, Dept Urol, Pensacola, FL USA.
USN, Aerosp & Operat Med Inst, Pensacola, FL USA.
RP Feeks, EF (reprint author), USN, Quarters 36,Barrancas Area, NAS Pensacola, FL 32508 USA.
NR 28
TC 1
Z9 1
U1 0
U2 0
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 0095-6562
J9 AVIAT SPACE ENVIR MD
JI Aviat. Space Environ. Med.
PD AUG
PY 1998
VL 69
IS 8
BP 785
EP 787
PG 3
WC Public, Environmental & Occupational Health; Medicine, General &
Internal; Sport Sciences
SC Public, Environmental & Occupational Health; General & Internal
Medicine; Sport Sciences
GA 106WT
UT WOS:000075174600011
PM 9715969
ER
PT J
AU Mandell, AJ
Owens, MJ
Selz, KA
Morgan, WN
Shlesinger, MF
Nemeroff, CB
AF Mandell, AJ
Owens, MJ
Selz, KA
Morgan, WN
Shlesinger, MF
Nemeroff, CB
TI Mode matches in hydrophobic free energy eigenfunctions predict
peptide-protein interactions
SO BIOPOLYMERS
LA English
DT Article
DE hydrophobic free energy eigenfunction; peptide hydrophobic wavelets;
peptide power spectra; hydrophobic modes; dopamine D(2) receptor;
dopamine transporter (DAT); neurotensin; cholecystokinin
ID MEMBRANE-PROTEINS; HORMONE RECEPTOR; AMINO-ACIDS; TRANSPORTERS;
DOPAMINE; CHOLECYSTOKININ; RAT; IMMUNOREACTIVITY; NEUROTENSIN;
SPECIFICITY
AB The dominant statistical hydrophobic free energy inverse frequencies, amino acid wavelengths as hydrophobic modes, of neurotensin (NT), cholescystokinin (CCK), the human dopamine D(2) receptor [(DA)D(2)], and the human dopamine transporter (DAT) were determined using orthogonal decomposition of the autocovariance matrices of their amino acid sequences as hydrophobic free energy equivalents in kcal/mol. The leading eigenvalues-associated eigenvectors were convolved with the original series to construct eigenfunctions. Eigenfunctions were further analyzed using discrete trigonometric wavelet and all pales, maximum entropy power spectral transformations. This yielded clean representations of the dominant hydrophobic free energy modes, most of which are otherwise lost in the smoothing of hydropathy plots or contaminated by end effects and multimodality in conventional Fourier transformations, Mode matches were found between NT and (DA)D(2) and between CCK and DAT, but not the converse. These mode matches successfully predicted the nonlinear kinetic interactions of NT-(DA)D(2) in contrast with CCK-(DA)D(2) on (3)H-spiperone binding to (DA)D(2), and by CCK-DAT but not NT-DAT on [N-methyl-(3)H]-WIN 35,428 binding to DAT in (DA)D(2) and DAT cDNA stably transfected cell lines without known NT or CCK receptors. Computation of the dominant modes of hydrophobic free energy eigenfunctions may help predict functionally relevant peptide-membrane protein interactions, even across neurotransmitter families. (C) 1998 John Wiley & Sons, Inc.
C1 Emory Univ, Sch Med, Cielo Inst, Atlanta, GA 30322 USA.
Emory Univ, Sch Med, Dept Psychiat, Atlanta, GA 30322 USA.
Florida Atlantic Univ, Dept Math, Boca Raton, FL 33431 USA.
Off Naval Res, Div Phys Sci, Arlington, VA 22217 USA.
RP Mandell, AJ (reprint author), Emory Univ, Cielo Inst, 486 Sunset Dr, Asheville, NC 28804 USA.
RI Owens, Michael/G-5191-2012
FU NIMH NIH HHS [R43 MH58026-01]
NR 64
TC 30
Z9 31
U1 0
U2 0
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0006-3525
J9 BIOPOLYMERS
JI Biopolymers
PD AUG
PY 1998
VL 46
IS 2
BP 89
EP 101
PG 13
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA ZV643
UT WOS:000074326400004
PM 9664843
ER
PT J
AU Kleiman, VD
Arrivo, SM
Melinger, JS
Heilweil, EJ
AF Kleiman, VD
Arrivo, SM
Melinger, JS
Heilweil, EJ
TI Controlling condensed-phase vibrational excitation with tailored
infrared pulses
SO CHEMICAL PHYSICS
LA English
DT Article
ID LASER-PULSES; SELECTIVE EXCITATION; FEMTOSECOND PULSES; SCATTERING;
DYNAMICS; LADDER
AB Vibrational population distributions within the CO-stretching T-1u manifold of W(CO)(6) in room-temperature n-hexane were created by using near-transform limited and linearly chirped picosecond infrared excitation pulses. These pulses were characterized using the second harmonic FROG (frequency-resolved optical gating) algorithm to determine the similar to 8 cm(-1)/ps chirp for both positively- and negatively-chirped 2 ps pulses. FROG and time-resolved transient difference spectra were obtained with an InSb focal plane array detector. While unchirped and positively-chirped excitation leads predominantly to upsilon = 1 population, negatively-chirped pulses produce excess population in the Li = 2 level. These results are compared to predictions from density matrix calculations for a model potential. (C) 1998 Elsevier Science B.V. All rights reserved.
C1 Natl Inst Stand & Technol, Opt Technol Div, Gaithersburg, MD 20899 USA.
USN, Res Lab, Div Condensed Matter & Radiat Sci, Washington, DC 20375 USA.
RP Heilweil, EJ (reprint author), Natl Inst Stand & Technol, Opt Technol Div, Gaithersburg, MD 20899 USA.
RI Kleiman, Valeria/H-7818-2013
OI Kleiman, Valeria/0000-0002-9975-6558
NR 24
TC 49
Z9 49
U1 0
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0301-0104
J9 CHEM PHYS
JI Chem. Phys.
PD AUG 1
PY 1998
VL 233
IS 2-3
BP 207
EP 216
DI 10.1016/S0301-0104(97)00367-4
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 108HU
UT WOS:000075260900006
ER
PT J
AU Holland, KT
AF Holland, KT
TI Beach cusp formation and spacings at Duck, USA
SO CONTINENTAL SHELF RESEARCH
LA English
DT Article
DE beach cusps; swash; video imaging
ID NATURAL BEACH; FIELD; SWASH
AB Approximately nine years of daily video images from Duck, NC, USA, were analyzed to determine the timing of cusp formation in relation to environmental forcing and the distances separating consecutive cusp horns. 57 independent cusp events (defined as transitions from visibly smooth to cuspate topography) were observed with most of the cusps forming after storms. The temporal lag between the peak in storm intensity and cusp development was typically 3 days. Approximately half of the cusp events had formations predicted by an empirical threshold relating storm presence, breaker angle, and beach reflectivity. This threshold and other statistical observations suggest that Duck cusps form as energy conditions become more reflective, as the offshore wave angle approaches normal incidence and as the directional spread of the incident wave field becomes narrower. The standard deviation of the observed spacings relative to the mean spacing for each event was around 15% with the range in spacings for each event being typically less than half the event's mean cusp width. There were no strong statistical relationships between mean cusp spacings and environmental parameters (such as swash excursion lengths). Copyright (C) 1998 Elsevier Science Ltd. All rights reserved.
C1 USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Holland, KT (reprint author), USN, Res Lab, Code 7442, Stennis Space Ctr, MS 39529 USA.
RI Holland, K. Todd/A-7673-2011
OI Holland, K. Todd/0000-0002-4601-6097
NR 30
TC 22
Z9 24
U1 0
U2 2
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0278-4343
J9 CONT SHELF RES
JI Cont. Shelf Res.
PD AUG
PY 1998
VL 18
IS 10
BP 1081
EP 1098
DI 10.1016/S0278-4343(98)00024-7
PG 18
WC Oceanography
SC Oceanography
GA 131NZ
UT WOS:000076583300002
ER
PT J
AU Schoelch, SB
Barrett, TL
AF Schoelch, SB
Barrett, TL
TI Umbilical pilonidal sinus
SO CUTIS
LA English
DT Article
AB Although most cases of pilonidal sinus occur in the sacrococcygeal region, umbilical presentations can occur. Due to the risk of peritoneal extension of inflammation from this lesion, the umbilical pilonidal sinus should be treated more aggressively than its sacrococcygeal counterpart. Pilonidal sinus should therefore be included in the differential diagnosis of umbilical nodules.
C1 USN, Med Ctr, Dept Clin Invest, San Diego, CA 92134 USA.
USN, Med Ctr, Dept Dermatol, San Diego, CA 92134 USA.
RP Schoelch, SB (reprint author), USN, Med Ctr, Dept Clin Invest, 34800 Bob Wilson Dr, San Diego, CA 92134 USA.
NR 7
TC 7
Z9 7
U1 0
U2 0
PU EXCERPTA MEDICA INC
PI NEW YORK
PA 245 WEST 17TH STREET, NEW YORK, NY 10011 USA
SN 0011-4162
J9 CUTIS
JI Cutis
PD AUG
PY 1998
VL 62
IS 2
BP 83
EP 84
PG 2
WC Dermatology
SC Dermatology
GA 109MQ
UT WOS:000075326700009
PM 9714903
ER
PT J
AU McKinlay, JR
Kaiser, J
Barrett, TL
Graham, B
AF McKinlay, JR
Kaiser, J
Barrett, TL
Graham, B
TI Blue rubber bleb nevus syndrome
SO CUTIS
LA English
DT Article
AB Blue rubber bleb nevus syndrome is a rare autosomal dominant disorder of multiple venous malformations of the skin and gastrointestinal tract. The fragility of the gastrointestinal lesions may lead to significant occult blood loss and subsequent anemia.
C1 USN, San Diego Med Ctr, Dept Clin Res, San Diego, CA 92134 USA.
USN, San Diego Med Ctr, Dept Dermatol, San Diego, CA 92134 USA.
RP McKinlay, JR (reprint author), USN, San Diego Med Ctr, Dept Clin Res, 34800 Bob Wilson Dr, San Diego, CA 92134 USA.
NR 9
TC 6
Z9 6
U1 0
U2 0
PU EXCERPTA MEDICA INC
PI NEW YORK
PA 245 WEST 17TH STREET, NEW YORK, NY 10011 USA
SN 0011-4162
J9 CUTIS
JI Cutis
PD AUG
PY 1998
VL 62
IS 2
BP 97
EP 98
PG 2
WC Dermatology
SC Dermatology
GA 109MQ
UT WOS:000075326700013
PM 9714907
ER
PT J
AU Ash, K
Lord, J
Zukowski, M
McDaniel, DH
AF Ash, K
Lord, J
Zukowski, M
McDaniel, DH
TI Comparison of topical therapy for striae alba (20% glycolic acid 0.05%
tretinoin versus 20% glycolic acid 10% L-ascorbic acid)
SO DERMATOLOGIC SURGERY
LA English
DT Article
ID ALPHA-HYDROXY ACIDS; PHOTOAGED SKIN; DOUBLE-BLIND; STRETCH MARKS;
DISTENSAE; CREAMS
AB BACKGROUND. Topical treatment of striae rubra with 0.1% tretinoin and laser treatment of striae rubra and alba with the 585-nm pulsed dye laser are proven therapeutic options. However, little efficacy has been shown for treatment of striae alba topically, and the laser is currently not a suitable treatment option for darker ethnic skin types.
OBJECTIVE. The purpose of this study was to demonstrate that selected commercial topical agents can improve the appearance of striae alba.
METHODS. Ten patients of varying skin types (I-V) having striae distensae alba on the abdomen or thighs were selected to evaluate the effectiveness of two topical treatment regimens. Patients were placed on daily topical application of 20% glycolic acid (MD Forte) to the entire treatment area. In addition, the patients applied 10% L-ascorbic acid, 2% zinc sulfate, and 0.5% tyrosine to half to the treatment area and 0.05% tretinoin emollient cream (Renova) to the other half of the treatment area. The creams were applied on a daily basis for 12 weeks. Improvement teas evaluated at 4 and 12 weeks in an objective unblinded fashion at the follow-up visits, a objective blinded fashion by visual grading at the conclusion of the study, and in an objective blinded fashion with profilometry. Additionally, histopathologic analysis was performed.
RESULTS. Analysis of these data reveals: 1) both regimens can improve the appearance of stretch marks; 2) these topical therapy regimens are safe and effective in study patients with minimal irritation; 3) elastin content within the reticular and papillary dermis can increase with topical 20% glycolic acid combined with 0.05% tretinoin emollient cream therapy; 4) both regimens increased epidermal thickness and decreased papillary dermal thickness in treated stretch marks when compared with untreated stretch marks; 5) combined epidermal and papillary dermal thickness in stretch marks treated with either topical regimen approaches that of normal skin; and 6) profilometry can objectively measure differences in skin texture associated with striae treatments when compared to controls, however, it is not sensitive enough to justify comparison or quantitative improvements between similarly effective treatments. (C) 1998 by the American Society for Dermatologic Surgery, Inc. Dermatol Surg 1998;24:849-856.
C1 USN, Med Ctr, Dept Gen Surg, Portsmouth, VA USA.
USN, Med Ctr, Dept Plast & Reconstruct Surg, Portsmouth, VA USA.
Eastern Virginia Med Sch, Laser Ctr Virginia, Virginia Beach, VA USA.
RP McDaniel, DH (reprint author), 933 1st Colonial Rd,Suite 113, Virginia Beach, VA 23454 USA.
NR 26
TC 38
Z9 38
U1 1
U2 5
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 USA
SN 1076-0512
J9 DERMATOL SURG
JI Dermatol. Surg.
PD AUG
PY 1998
VL 24
IS 8
BP 849
EP 856
PG 8
WC Dermatology; Surgery
SC Dermatology; Surgery
GA 112BR
UT WOS:000075474700006
PM 9723049
ER
PT J
AU Wu, F
Chen, LG
Sun, FR
Wu, C
Hua, PQ
AF Wu, F
Chen, LG
Sun, FR
Wu, C
Hua, PQ
TI Optimum performance parameters for a quantum carnot heat pump with
spin-1/2
SO ENERGY CONVERSION AND MANAGEMENT
LA English
DT Article
DE spin-1/2 system; quantum heat pump; finite-time thermodynamics; modern
statistical mechanics
ID FINITE-TIME; ENGINE; THERMODYNAMICS; CYCLES; MODEL
AB The purpose of this paper is to study the optimal performance for an endoreversible Carnot heat pump with a working fluid system consisting of many spin-1/2 fermi. The relationship between the optimal heating load and the coefficient of performance (COP) for the quantum Carnot heat pump is derived. The optimum parameters are obtained at a maximum heating load point and at a maximum ecological function point, respectively. Published by Elsevier Science Ltd.
C1 Naval Acad Engn, Fac 306, Wuhan 430033, Peoples R China.
USN Acad, Dept Engn Mech, Annapolis, MD 21402 USA.
Wuhan Inst Chem Technol, Fac Phys, Wuhan 430073, Peoples R China.
RP Wu, F (reprint author), Naval Acad Engn, Fac 306, Wuhan 430033, Peoples R China.
EM wu@arctic.nadn.navy.mil
NR 24
TC 31
Z9 37
U1 0
U2 1
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0196-8904
J9 ENERG CONVERS MANAGE
JI Energy Conv. Manag.
PD AUG
PY 1998
VL 39
IS 11
BP 1161
EP 1167
DI 10.1016/S0196-8904(98)00004-1
PG 7
WC Thermodynamics; Energy & Fuels; Mechanics
SC Thermodynamics; Energy & Fuels; Mechanics
GA ZT638
UT WOS:000074107900005
ER
PT J
AU Brandt, JE
Medin, JA
Rosler, ES
Li, C
Chute, JP
Hoffman, R
AF Brandt, JE
Medin, JA
Rosler, ES
Li, C
Chute, JP
Hoffman, R
TI High-level transgene expression by human CD34(+)CD38(+) hematopoietic
stem cells following in vitro expansion.
SO EXPERIMENTAL HEMATOLOGY
LA English
DT Meeting Abstract
C1 Univ Illinois, Chicago, IL USA.
USN, Med Res Inst, Bethesda, MD USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CARDEN JENNINGS PUBL CO LTD
PI CHARLOTTESVILLE
PA BLAKE CTR, STE 200, 1224 W MAIN ST, CHARLOTTESVILLE, VA 22903 USA
SN 0301-472X
J9 EXP HEMATOL
JI Exp. Hematol.
PD AUG
PY 1998
VL 26
IS 8
MA 24
BP 687
EP 687
PG 1
WC Hematology; Medicine, Research & Experimental
SC Hematology; Research & Experimental Medicine
GA 118GT
UT WOS:000075830600026
ER
PT J
AU Brandt, JE
Bartholomew, AM
Nelson, MC
Chute, JP
Turian, JV
Chen, L
Hoffman, R
AF Brandt, JE
Bartholomew, AM
Nelson, MC
Chute, JP
Turian, JV
Chen, L
Hoffman, R
TI Rescue of lethally myeloablated baboons with ex vivo expanded grafts
results in delayed engraftment.
SO EXPERIMENTAL HEMATOLOGY
LA English
DT Meeting Abstract
C1 Univ Illinois, Chicago, IL USA.
USN, Med Res Inst, Bethesda, MD USA.
NR 0
TC 3
Z9 3
U1 0
U2 0
PU CARDEN JENNINGS PUBL CO LTD
PI CHARLOTTESVILLE
PA BLAKE CTR, STE 200, 1224 W MAIN ST, CHARLOTTESVILLE, VA 22903 USA
SN 0301-472X
J9 EXP HEMATOL
JI Exp. Hematol.
PD AUG
PY 1998
VL 26
IS 8
MA 58
BP 699
EP 699
PG 1
WC Hematology; Medicine, Research & Experimental
SC Hematology; Research & Experimental Medicine
GA 118GT
UT WOS:000075830600060
ER
PT J
AU Chute, JP
Saini, AA
Wells, MR
Clark, W
Smoot, D
Harlan, DM
St Louis, D
Kaushal, S
Davis, TA
AF Chute, JP
Saini, AA
Wells, MR
Clark, W
Smoot, D
Harlan, DM
St Louis, D
Kaushal, S
Davis, TA
TI Coculture of human CD34(+)CD38(+) cells with procine microvascular
endothelial cells (PMVEC) or PMVEC-Conditioned media enhances retroviral
mediated gene transfer.
SO EXPERIMENTAL HEMATOLOGY
LA English
DT Meeting Abstract
C1 USN, Med Res Inst, Uniformed Serv Univ Hlth Sci, Bethesda, MD USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CARDEN JENNINGS PUBL CO LTD
PI CHARLOTTESVILLE
PA BLAKE CTR, STE 200, 1224 W MAIN ST, CHARLOTTESVILLE, VA 22903 USA
SN 0301-472X
J9 EXP HEMATOL
JI Exp. Hematol.
PD AUG
PY 1998
VL 26
IS 8
MA 279
BP 761
EP 761
PG 1
WC Hematology; Medicine, Research & Experimental
SC Hematology; Research & Experimental Medicine
GA 118GT
UT WOS:000075830600281
ER
PT J
AU Kaushal, S
St Louis, D
Saini, AA
Wells, M
Clark, W
Smoot, D
Harlan, DM
Davis, TA
Chute, JP
AF Kaushal, S
St Louis, D
Saini, AA
Wells, M
Clark, W
Smoot, D
Harlan, DM
Davis, TA
Chute, JP
TI Expression of GLVR-1 and GLVR-2 on human CD34+CD38- bone marrow cells
following co-culture with porcine microvascular endothelial cells
(PMVEC) and liquid culture with PMVEC-CM.
SO EXPERIMENTAL HEMATOLOGY
LA English
DT Meeting Abstract
C1 USN, Med Res Inst, Uniformed Serv Univ Hlth Sci, Bethesda, MD USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CARDEN JENNINGS PUBL CO LTD
PI CHARLOTTESVILLE
PA BLAKE CTR, STE 200, 1224 W MAIN ST, CHARLOTTESVILLE, VA 22903 USA
SN 0301-472X
J9 EXP HEMATOL
JI Exp. Hematol.
PD AUG
PY 1998
VL 26
IS 8
MA 280
BP 761
EP 761
PG 1
WC Hematology; Medicine, Research & Experimental
SC Hematology; Research & Experimental Medicine
GA 118GT
UT WOS:000075830600282
ER
PT J
AU Lum, LG
Lefever, AV
Treisman, J
Garlie, N
Kistler, AM
Yuille, DL
Levine, BL
June, CH
Hanson, JP
AF Lum, LG
Lefever, AV
Treisman, J
Garlie, N
Kistler, AM
Yuille, DL
Levine, BL
June, CH
Hanson, JP
TI Phase I study of anti-CD3/anti-CD28 coactivated T cells (COACTS) in
cancer patients: Enhanced Th-1 responses in vivo
SO EXPERIMENTAL HEMATOLOGY
LA English
DT Meeting Abstract
C1 St Lukes Med Ctr, Milwaukee, WI USA.
USN, Med Res Inst, Bethesda, MD USA.
RI Levine, Bruce/D-1688-2009
NR 0
TC 1
Z9 1
U1 0
U2 0
PU CARDEN JENNINGS PUBL CO LTD
PI CHARLOTTESVILLE
PA BLAKE CTR, STE 200, 1224 W MAIN ST, CHARLOTTESVILLE, VA 22903 USA
SN 0301-472X
J9 EXP HEMATOL
JI Exp. Hematol.
PD AUG
PY 1998
VL 26
IS 8
MA 324
BP 772
EP 772
PG 1
WC Hematology; Medicine, Research & Experimental
SC Hematology; Research & Experimental Medicine
GA 118GT
UT WOS:000075830600326
ER
PT J
AU Coss, HS
Manos, RE
Buoncristiani, A
Mills, WJ
AF Coss, HS
Manos, RE
Buoncristiani, A
Mills, WJ
TI Abduction stress and AP weightbearing radiography of purely ligamentous
injury in the tarsometatarsal joint
SO FOOT & ANKLE INTERNATIONAL
LA English
DT Article
ID FRACTURE-DISLOCATION; DIAGNOSIS
AB Twenty volunteers (40 feet) with no prior foot injury underwent standardized abduction stress and standing AP radiographs. Subsequently, the Lisfranc and dorsal tarsometatarsal ligaments in nine feet from cadavers were sectioned in a varying sequential manner, and interval standardized radiographs of abduction stress and AP simulated weightbearing were obtained. On abduction stress radiographs in 39 of 40 feet of volunteers and nine of nine feet of cadavers before sectioning, a line tangential to the medial aspect of the navicular and medial cuneiform (medial column line) intersected the base of the first metatarsal. Combining the sectioning of the Lisfranc and dorsal tarsometatarsal ligaments produced a disruption of the medial column line in all feet from cadavers. Disruption of this medial column line may be a simple and valuable diagnostic tool for determining significant ligamentous injury to the tarsometatarsal interval.
C1 USN Hosp, Dept Orthoped Surg & Clin Invest, San Diego, CA 92134 USA.
RP Mills, WJ (reprint author), US Navy Reserve, Naval Med Ctr, Dept Orthoped Surg, San Diego, CA 92134 USA.
NR 32
TC 40
Z9 43
U1 0
U2 5
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 USA
SN 1071-1007
J9 FOOT ANKLE INT
JI Foot Ankle Int.
PD AUG
PY 1998
VL 19
IS 8
BP 537
EP 541
PG 5
WC Orthopedics
SC Orthopedics
GA 112FN
UT WOS:000075483600006
PM 9728701
ER
PT J
AU Hacker, P
Firing, E
Hummon, J
Gordon, AL
Kindle, JC
AF Hacker, P
Firing, E
Hummon, J
Gordon, AL
Kindle, JC
TI Bay of Bengal currents during the northeast monsoon
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID INDIAN-OCEAN
AB Velocity and property observations were made during February and March 1995 as part of the World Ocean Circulation Experiment (WOCE) Hydrographic Program (WHP) expedition in the Indian Ocean. The observed circulation in the upper 300 m of the ocean during the northeast monsoon is compared to the output of a high-resolution, S-layer, nonlinear model forced by European Center for Medium Range Weather Forecasting (ECMWF) winds. The data identify several new features in the Bay of Bengal: a shelf-break coastal current in the northeast corner, an eddy and subsurface jet near the South Preparis Channel, and an eastward countercurrent extending from 80 degrees E to the eastern boundary. The countercurrent transports high-salinity surface water from the northwest Indian Ocean into the bay, and separates the historically observed North Equatorial Current into two currents with separate sources and water properties. The data also detail the spatial structure of the South Equatorial Current and Countercurrent, and show the Equatorial Undercurrent in the eastern half of the Indian Ocean. The model compares well enough with the data to suggest that such realistic models may provide a useful temporal context for the WHP snapshot.
C1 USN, Res Ctr, Stennis Space Ctr, MS 39529 USA.
Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA.
Univ Hawaii, Honolulu, HI 96822 USA.
RP Hacker, P (reprint author), JIMAR, 1000 Pope Rd, Honolulu, HI 96822 USA.
EM hacker@soest.hawaii.edu; agordon@ldgo.columbia.edu;
kindle@polaris.nrlssc.navy.mil
RI Gordon, Arnold/H-1049-2011
OI Gordon, Arnold/0000-0001-6480-6095
NR 13
TC 27
Z9 28
U1 0
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD AUG 1
PY 1998
VL 25
IS 15
BP 2769
EP 2772
DI 10.1029/98GL52115
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 108WZ
UT WOS:000075289900003
ER
PT J
AU Russell, CT
Fedder, JA
Slinker, SP
Zhou, XW
Le, G
Luhmann, JG
Fenrich, FR
Chandler, MO
Moore, TE
Fuselier, SA
AF Russell, CT
Fedder, JA
Slinker, SP
Zhou, XW
Le, G
Luhmann, JG
Fenrich, FR
Chandler, MO
Moore, TE
Fuselier, SA
TI Entry of the POLAR spacecraft into the polar cusp under northward IMF
conditions
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID INTERPLANETARY MAGNETIC-FIELD; LATITUDE BOUNDARY-LAYER; RECONNECTION;
INSTRUMENT; ANGLE
AB On May 29, 1996 from 0200 to 0800 UT the solar wind dynamic pressure was high ranging from 6 to 8 nPa and the interplanetary field was almost due northward, ranging from 10 to 15 nT in BZ GSM. Even at apogee the POLAR spacecraft should not have entered the magnetosheath according to recent scaling laws. However, the magnetic field was greatly depressed below the value expected indicating the presence of significant plasma energy density throughout the high latitude magnetosphere surrounding the cusp. The presence of this plasma is confirmed by the plasma instrumentation on board the spacecraft. While the entry into this nearly stagnant plasma was gradual, the exit on to polar cap field lines was abrupt. We interpret these observations in terms of the post-cusp reconnection of the strongly northward interplanetary magnetic field.
C1 Univ Calif Los Angeles, Inst Geophys, Los Angeles, CA 90095 USA.
Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA.
George Mason Univ, Inst Computat Sci & Informat, Fairfax, VA 22030 USA.
USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA.
NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
Lockheed Martin, Palo Alto, CA USA.
RP Russell, CT (reprint author), Univ Calif Los Angeles, Inst Geophys, Los Angeles, CA 90095 USA.
RI Le, Guan/C-9524-2012; Moore, Thomas/D-4675-2012;
OI Le, Guan/0000-0002-9504-5214; Moore, Thomas/0000-0002-3150-1137;
Russell, Christopher/0000-0003-1639-8298
NR 18
TC 31
Z9 31
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD AUG 1
PY 1998
VL 25
IS 15
BP 3015
EP 3018
DI 10.1029/98GL00355
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 108WZ
UT WOS:000075289900065
ER
PT J
AU Brueckner, GE
Delaboudiniere, JP
Howard, RA
Paswaters, SE
St Cyr, OC
Schwenn, R
Lamy, P
Simnett, GM
Thompson, B
Wang, D
AF Brueckner, GE
Delaboudiniere, JP
Howard, RA
Paswaters, SE
St Cyr, OC
Schwenn, R
Lamy, P
Simnett, GM
Thompson, B
Wang, D
TI Geomagnetic storms caused by coronal mass ejections (CMEs): March 1996
through June 1997
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID ULTRAVIOLET
AB (1) All but two geomagnetic storms with Kp greater than or equal to 6 during the operating period (March 1996 through June 1997) of the Large Angle Spectroscopic Coronagraph (LASCO) experiment on the Solar and Heliospheric Observatory (SOHO) spacecraft can be traced to Coronal Mass Ejections (CMEs). (2) These geomagnetic storms are not related to high speed solar wind streams. (3) The CMEs which cause geomagnetic effects, can be classified into two categories: Halo events and toroidal CMEs.. (4) The CMEs are accompanied by Coronal Shock Waves as seen in the Extreme Ultraviolet Imaging Telescope (EIT) Fe XII images. (5) Some CMEs are related to flares, others are not. (6) In many cases, the travel time between the explosion on the Sun and the maximum geomagnetic activity is about 80 hours.
C1 USN, Res Lab, EO Hulburt Ctr Space Res, Washington, DC 20375 USA.
Univ Paris 11, Inst Astrophys Spatiale, F-91405 Orsay, France.
Astron Spatiale Lab, F-13376 Marseille, France.
Max Planck Inst Aeron, D-37189 Katlenburg Lindau, Germany.
Univ Birmingham, Space Res Grp, Birmingham B15 2TT, W Midlands, England.
Space Applicat Corp, Vienna, VA 22180 USA.
Interferometr Inc, Chantilly, VA USA.
Computat Phys Inc, Fairfax, VA USA.
RP Brueckner, GE (reprint author), USN, Res Lab, EO Hulburt Ctr Space Res, Washington, DC 20375 USA.
RI Thompson, Barbara/C-9429-2012
NR 9
TC 111
Z9 112
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD AUG 1
PY 1998
VL 25
IS 15
BP 3019
EP 3022
DI 10.1029/98GL00704
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 108WZ
UT WOS:000075289900066
ER
PT J
AU Hofmeister, EP
Shin, AY
AF Hofmeister, EP
Shin, AY
TI The role of prophylactic fasciotomy and medical treatment in limb
ischemia and revascularization
SO HAND CLINICS
LA English
DT Article
ID FREE-RADICAL SCAVENGERS; SKELETAL-MUSCLE; REPERFUSION INJURY; ISOLATED
NEUTROPHILS; LIPID-PEROXIDATION; DEFEROXAMINE; RABBIT; DESFERRIOXAMINE;
MYELOPEROXIDASE; PERMEABILITY
AB Multiple studies have demonstrated that muscle poorly tolerates ischemia. When the ischemic state is unduly prolonged, the successfully replanted or revascularized limb undergoes deleterious biochemical reactions that cascade to vessel intimal damage, increased vessel permeability, and lowering of pH. The resultant tissue edema leads to increasing compartment pressures, which not only impede the recovery of function, but also can lead to irreversible muscle necrosis, increased risk of infection, and sepsis if not reversed in a timely fashion. The development of compartment syndrome jeopardizes not only the injured limb, but life itself secondary to the biochemical toxins produced by the ischemic extremity. A thorough understanding of the biochemistry of ischemia and reperfusion provides insight into the role of fasciotomy in the replanted or revascularized extremity. The scientific basis for fasciotomy in the revascularized or replanted limb is discussed as well as the potential "protective" role of pharmacologic agents in ischemic and reperfusion injury.
C1 USN, Med Ctr, Dept Clin Invest, Div Hand & Microvasc Surg, San Diego, CA 92134 USA.
USN, Med Ctr, Dept Orthopaed Surg, San Diego, CA 92134 USA.
RP Shin, AY (reprint author), USN, Med Ctr, Dept Clin Invest, Div Hand & Microvasc Surg, San Diego, CA 92134 USA.
OI Shin, Alexander/0000-0001-9658-8192
NR 54
TC 13
Z9 13
U1 1
U2 2
PU W B SAUNDERS CO
PI PHILADELPHIA
PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA
19106-3399 USA
SN 0749-0712
J9 HAND CLIN
JI Hand Clin.
PD AUG
PY 1998
VL 14
IS 3
BP 457
EP +
PG 10
WC Orthopedics
SC Orthopedics
GA 119MG
UT WOS:000075899800013
PM 9742424
ER
PT J
AU Townsend, JK
Haraszti, Z
Freebersyser, JA
Devetsikiotis, M
AF Townsend, JK
Haraszti, Z
Freebersyser, JA
Devetsikiotis, M
TI Simulation of rare events in communications networks
SO IEEE COMMUNICATIONS MAGAZINE
LA English
DT Article
AB Computer simulation is an important tool in the analysis and design of communications networks. In spite of the advances in computational power, using simulation to obtain rare event probabilities such as cell/packet loss or delay in networks still requires prohibitively long execution times. We provide an overview of importance sampling techniques and how they can be used to provide orders of magnitude speedup for many network problems.
C1 N Carolina State Univ, Raleigh, NC 27695 USA.
Off Naval Res, Arlington, VA 22217 USA.
Carleton Univ, Ottawa, ON K1S 5B6, Canada.
RP Townsend, JK (reprint author), N Carolina State Univ, Raleigh, NC 27695 USA.
NR 13
TC 13
Z9 13
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA
SN 0163-6804
J9 IEEE COMMUN MAG
JI IEEE Commun. Mag.
PD AUG
PY 1998
VL 36
IS 8
BP 36
EP 41
DI 10.1109/35.707815
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 108VD
UT WOS:000075285600003
ER
PT J
AU Crepeau, PJ
AF Crepeau, PJ
TI Classification of error locator polynomials for double error correcting
BCH codes
SO IEEE TRANSACTIONS ON COMMUNICATIONS
LA English
DT Article; Proceedings Paper
CT Military Communications Conference
CY OCT 21-24, 1996
CL MCLEAN, VIRGINIA
DE BCH codes; decoding; error correction
AB We give a complete classification of the error locator polynomials that occur in the Berlekamp decoding of double error correcting (DEC) Bose-Chaudhuri-Hocquenghem (BCH) codes. We present a new construction showing that all quadratic error locator polynomials produced by received vectors falling in the interstitial region between decoding spheres are illegitimate and have no roots. Furthermore, we show that a small subset of received vectors in the interstitial region produce cubic error locator polynomials that are illegitimate except for the correctable case of a triple error pattern with three equally spaced errors in the cyclic sense.
C1 USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
RP Crepeau, PJ (reprint author), USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
NR 1
TC 1
Z9 1
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA
SN 0090-6778
J9 IEEE T COMMUN
JI IEEE Trans. Commun.
PD AUG
PY 1998
VL 46
IS 8
BP 977
EP 980
DI 10.1109/26.705389
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 111UZ
UT WOS:000075457800002
ER
PT J
AU Solka, JL
Marchette, DJ
Wallet, BC
Irwin, VL
Rogers, GW
AF Solka, JL
Marchette, DJ
Wallet, BC
Irwin, VL
Rogers, GW
TI Identification of man-made regions in unmanned aerial vehicle imagery
and videos
SO IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE
LA English
DT Article
DE region of interest identification; unmanned aerial vehicle; video
processing
ID ADAPTIVE MIXTURES; COMPUTATION
AB This paper details recent work in our group on the use of low-level features for the identification of man-made regions in unmanned aerial vehicle (UAV) imagery. The feature sets that we have examined include classical statistical features such as the coefficient of variation in a window about a pixel, locally computed fractal dimension, and fractal dimension computed in the presence of wavelet boundaries. We will discuss these techniques of feature extraction along with our approach to the classification of the features. Our classification work has focused on the use of a new semiparametric probability density estimation technique. In addition, we will present classification results for region of interest identification based on a Set of test images from a recent UAV test flight.
C1 USN, Ctr Surface Warfare, Adv Computat Technol Grp, Dahlgren Div, Dahlgren, VA 22448 USA.
RP Solka, JL (reprint author), USN, Ctr Surface Warfare, Adv Computat Technol Grp, Dahlgren Div, Code B10,17320 Dahlgren Rd, Dahlgren, VA 22448 USA.
EM jsolka@nswc.navy.mil
NR 15
TC 24
Z9 31
U1 0
U2 1
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 0162-8828
EI 1939-3539
J9 IEEE T PATTERN ANAL
JI IEEE Trans. Pattern Anal. Mach. Intell.
PD AUG
PY 1998
VL 20
IS 8
BP 852
EP 857
DI 10.1109/34.709607
PG 6
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA 110GT
UT WOS:000075372700008
ER
PT J
AU Davis, J
Deeney, C
AF Davis, J
Deeney, C
TI Z-pinch plasmas
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Editorial Material
C1 USN, Res Lab, Washington, DC 20375 USA.
Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Davis, J (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 2
TC 0
Z9 0
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA
SN 0093-3813
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD AUG
PY 1998
VL 26
IS 4
BP 1066
EP 1067
DI 10.1109/TPS.1998.725134
PG 2
WC Physics, Fluids & Plasmas
SC Physics
GA 125FN
UT WOS:000076226900001
ER
PT J
AU Commisso, RJ
Apruzese, JP
Black, DC
Boller, JR
Moosman, B
Mosher, D
Stephanakis, SJ
Weber, BV
Young, FC
AF Commisso, RJ
Apruzese, JP
Black, DC
Boller, JR
Moosman, B
Mosher, D
Stephanakis, SJ
Weber, BV
Young, FC
TI Results of radius scaling experiments and analysis of neon K-shell
radiation data from an inductively driven Z-pinch
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article
DE inductive energy storage; plasma pinch; X-ray production
ID RAYLEIGH-TAYLOR INSTABILITY; PLASMA OPENING SWITCH; ALUMINUM-WIRE-ARRAY;
X-RAY-EMISSION; GAS-PUFF; IMPLOSIONS; LOADS; POWER; PREIONIZATION;
SUPPRESSION
AB The K-shell radiated energy (yield) from neon Z-pinch implosions with annular, gas-puff nozzle radii of 1, 1.75, and 2.5 cm was measured for implosion times from 50 to 300 ns while systematically keeping the implosion kinetic energy nearly constant. The implosions were driven by the Hawk inductive-storage generator at the 0.65-MA level. Initial neutral-neon density distributions from the nozzles were determined with laser interferometry. Measured yields are compared with predictions from zero-dimensional (0-D) scaling models of ideal, one-dimensional (1-D) pinch behavior to both benchmark the scaling models, and to determine their utility for predicting K-shell yields for argon implosions of 200 to >300 ns driven by corresponding currents of 4 to 9 MA, such as envisioned for the DECADE QUAD. For all three nozzles, the 0-D models correctly predict the Z-pinch mass for maximum yield. For the 1- and 1.75-cm radius nozzles, the scaling models accurately match the measured yields if the ratio of initial to final radius (compression ratio) is assumed to be 8:1, For the 2.5-cm radius nozzle, the measured yields are only one-third of the predictions. Analysis of K-shell spectral measurements suggest that as much as 70% (50%) of the imploded mass is radiating in the K-shell for the 1-cm (1.75-cm) radius nozzle, That fraction is only 10% for the 2.5-cm radius nozzle, The 0-D scaling models are useful for predicting 1-D-like K-shell radiation yields (better than a factor-of-two accuracy) when a nominal (approximate to 10:1) compression ratio is assumed. However, the compression ratio assumed in the models is only an "effective" quantity, so that further interpretations based on the 0-D analysis require additional justification. The lower-than-predicted yield for the 2.5-cm radius nozzle is associated with larger radius and not with longer implosion time, and is probably a result of two-dimensional effects.
C1 USN, Res Lab, Div Plasma Phys, Pulsed Power Phys Branch, Washington, DC 20375 USA.
JAYCOR Inc, Vienna, VA 22102 USA.
RP Commisso, RJ (reprint author), USN, Res Lab, Div Plasma Phys, Pulsed Power Phys Branch, Washington, DC 20375 USA.
EM commisso@suzie.nrl.navy.mil
NR 50
TC 26
Z9 30
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA
SN 0093-3813
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD AUG
PY 1998
VL 26
IS 4
BP 1068
EP 1085
DI 10.1109/27.725135
PG 18
WC Physics, Fluids & Plasmas
SC Physics
GA 125FN
UT WOS:000076226900002
ER
PT J
AU Whitney, KG
Thornhill, JW
AF Whitney, KG
Thornhill, JW
TI The influence of temperature gradients on the distribution of axial
current in a large current Z-pinch implosion
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article
DE beta(A) conductivities; one-dimensional magnetohydrodynamics; Z-pinch
current profiles
ID ALUMINUM-WIRE-ARRAY; EMISSION
AB General algebraic expressions for the tensor electrical conductivity and heat conductivity are presented that are needed in one-dimensional (I-D) magnetohydrodynamic modeling of Z-pinch implosions. The expressions contain both the ionization state and the magnetic field dependence of these quantities and generalize Braginskii's results. The ionization dependence is important in any description of a Z-pinch's implosion dynamics, since substantial ionization occurs during the course of the implosion. The tensor character of the electrical conductivity implies that axial currents are generated by radial temperature gradients in the presence of a Z-pinch's magnetic field. We find that these currents make contributions to the full current distribution that are comparable to the electric field generated currents. The effect of these temperature gradients on the full current distribution in a 1-D Z-pinch implosion is calculated by using the derived formulas for the electrical resistivity. The implosion we model is similar to the one that was found in an analysis of time-resolved X-ray data to give a good representation of the temperature gradients generated in a 90-wire, aluminum shot on the Saturn generator at the Sandia National Laboratories. [Phys, Rev. E 56, 3540 (1997)], In the calculation, we find that, on axis, gradient-driven currents limit total current flow near the front surface of the plasma, causing a much larger current to flow in the plasma interior than otherwise and reducing the temperature gradients that would be calculated in their absence. The gradient structure of the plasma is changed because the modified current distribution produces a different set of j x B forces, which act on the plasma. These nonlinear magnetic field effects persist during the plasma's expansion from the axis following peak compression.
C1 USN, Res Lab, Div Plasma Phys, Radiat Hydrodynam Branch, Washington, DC 20375 USA.
RP Whitney, KG (reprint author), USN, Res Lab, Div Plasma Phys, Radiat Hydrodynam Branch, Washington, DC 20375 USA.
EM whitney@ppd.nrl.navy.mil
NR 16
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 USA
SN 0093-3813
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD AUG
PY 1998
VL 26
IS 4
BP 1168
EP 1178
DI 10.1109/27.725147
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 125FN
UT WOS:000076226900014
ER
PT J
AU Apruzese, JP
Thornhill, JW
Whitney, KG
Davis, J
Deeney, C
Nash, TJ
Spielman, RB
L'Eplattenier, P
LePell, PD
Failor, BH
Riordan, JC
Whitton, BA
Yadlowsky, EJ
Hazelton, RC
Moschella, JJ
AF Apruzese, JP
Thornhill, JW
Whitney, KG
Davis, J
Deeney, C
Nash, TJ
Spielman, RB
L'Eplattenier, P
LePell, PD
Failor, BH
Riordan, JC
Whitton, BA
Yadlowsky, EJ
Hazelton, RC
Moschella, JJ
TI Spectroscopic diagnosis of the temperature profile of an Al : Mg Z-pinch
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article
DE plasma measurements; plasma pinch; spectral analysis; X-ray
measurements; X-ray production; X-ray spectroscopy
ID ALUMINUM-WIRE-ARRAY; X-RAY-EMISSION; GAS-PUFF; HIGH-POWER; PLASMAS;
IMPLOSION; RADIATION; SPECTRA; ARGON; NEON
AB We consider the question of how the temperature profile of a Z-pinch plasma can be determined and/or constrained by the requirement that its observed ii-shell spectrum be replicated. As a case study we employ spatially integrated, time-resolved K-shell data obtained from the implosion of 30-wire Al:Mg alloy arrays on the Saturn driver at Sandia National Laboratories. Given the measured pinch size, its K-shell power and line intensities are compared with the predictions of a collisional-radiative-equilibrium plasma model whose temperature profile is varied in seeking agreement with the data. The Al data rules out a large range of possible temperature profiles, but two quite different temperature distributions can both match the measurements. These are: a uniform temperature, or, one with a sharply dropping temperature near the pinch outer edge. However, the measured ratio of the Mg a resonance lines to those of Al, even though time-integrated, excludes the possibility of a uniform temperature distribution.
C1 USN, Res Lab, Div Plasma Phys, Radiat Hydrodynam Branch, Washington, DC 20375 USA.
Sandia Natl Labs, Albuquerque, NM 87185 USA.
Maxwell Phys Int, San Leandro, CA 94577 USA.
HY Tech Res Corp, Radford, VA 24141 USA.
RP Apruzese, JP (reprint author), USN, Res Lab, Div Plasma Phys, Radiat Hydrodynam Branch, Washington, DC 20375 USA.
EM davisj@ppdu.nrl.navy.mil
NR 21
TC 12
Z9 14
U1 0
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA
SN 0093-3813
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD AUG
PY 1998
VL 26
IS 4
BP 1185
EP 1191
DI 10.1109/27.725149
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 125FN
UT WOS:000076226900016
ER
PT J
AU Davis, J
Clark, RW
Giuliani, JL
Thornhill, JW
Deeney, C
AF Davis, J
Clark, RW
Giuliani, JL
Thornhill, JW
Deeney, C
TI Radiative characteristics of pulsed power driven Z-pinch aluminum
plasmas
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article
DE magnetohydrodynamics; pulse power systems; X-ray spectroscopy
ID WIRE-ARRAY
AB In this paper, we study the dynamics of a massive aluminum Z-pinch plasma load and evaluate its performance as a soft X-ray radiator. A radiation hydrodynamic model self-consistently driven by a circuit describes the dynamics, Comparisons are made for the K- and L-shell soft X-ray emission as a function of the ionization dynamic model. The ionization dynamic models are represented by: 1) a time-dependent nonequilibrium (NEQ) model, 2) a collisional radiative equilibrium (CRE) model, and 3) a local thermodynamic equilibrium (LTE) model. For all three scenarios the radiation is treated 1) in the free streaming optically thin approximation where the plasma is treated as a volume emitter and 2) in the optically thick regime where the opacity for the lines and continuum is self-consistently calculated online and the radiation is transported through the plasma. Each simulation is carried out independently to determine the sensitivity of the implosion dynamics to the ionization and radiation model, i.e., how the ionization dynamic model affects the radiative yield and emission spectra, Results are presented for the L- and K-shell radiation yields and emission spectra as a function of photon energy from 10 eV to 10 keV, Also, departure coefficients from LTE are presented for selected levels and ionization stages.
C1 USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Davis, J (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
NR 12
TC 1
Z9 1
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA
SN 0093-3813
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD AUG
PY 1998
VL 26
IS 4
BP 1192
EP 1201
DI 10.1109/27.725150
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 125FN
UT WOS:000076226900017
ER
PT J
AU Manheimer, WM
Ewell, GW
AF Manheimer, WM
Ewell, GW
TI Electrostatic and parametric cyclotron wave amplifiers
SO IEEE TRANSACTIONS ON PLASMA SCIENCE
LA English
DT Article
DE cyclotron wave amplifiers; low noise amplifiers; parametric amplifiers
AB Cyclotron wave amplifiers were invented in both the United States and Russia in the late 1950's. While work in the United States was dropped in favor of solid state amplifiers, their development and use continues in Russia. This paper develops the basic theory of these amplifiers for Western scientists and engineers, specifies the performance of several sample commercially produced items, and compares performance of these devices with theory. Applications of devices to real world radar systems and the resulting advantages are briefly discussed.
C1 USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
Georgia Tech Res Inst, Syst Dev Lab, Atlanta, GA 30332 USA.
RP Manheimer, WM (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
NR 51
TC 1
Z9 1
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA
SN 0093-3813
J9 IEEE T PLASMA SCI
JI IEEE Trans. Plasma Sci.
PD AUG
PY 1998
VL 26
IS 4
BP 1282
EP 1296
DI 10.1109/27.725161
PG 15
WC Physics, Fluids & Plasmas
SC Physics
GA 125FN
UT WOS:000076226900028
ER
PT J
AU Yun, XP
Sarkar, N
AF Yun, XP
Sarkar, N
TI Unified formulation of robotic systems with holonomic and nonholonomic
constraints
SO IEEE TRANSACTIONS ON ROBOTICS AND AUTOMATION
LA English
DT Article
DE holonomic constraints; nonholonomic constraints
ID DIFFERENTIAL-ALGEBRAIC EQUATIONS; FEEDBACK STABILIZATION; MECHANICAL
SYSTEMS; NUMERICAL-SOLUTION; RIGID BODIES; MOTION; KINEMATICS; DYNAMICS;
MANIPULATION; CONTACT
AB Many robotic systems are subject to nonholonomic as well as holonomic constraints. Rolling contact between two rigid bodies is a typical example of such a system. In this study, a unified state space formulation of robotic systems subject to both holonomic and nonholonomic constraints is presented. The position-level holonomic constraints are first replaced by a set of velocity-level constraint equations that asymptotically converge to the original holonomic constraints. saving represented both holonomic and nonholonomic constraints in a common form, a state space representation of the constrained systems is then developed. A numerical algorithm for implementing the state space representation is also described. The proposed formulation eliminates the need to solve holonomic constraints either analytically or numerically, and ensures that holonomic constraints are always satisfied, particularly in computer simulations. The formulation makes it possible to treat systems with holonomic constraints, with nonholonomic constraints, or with both holonomic and nonholonomic constraints in a unified framework. Two examples are presented to illustrate the application of the unified formulation.
C1 USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
Univ Hawaii Manoa, Dept Mech Engn, Honolulu, HI 96822 USA.
RP USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
EM yun@ece.nps.navy.mil; sarkar@wiliki.eng.hawaii.edu
NR 56
TC 60
Z9 63
U1 1
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1042-296X
J9 IEEE T ROBOTIC AUTOM
JI IEEE Trans. Robot. Autom.
PD AUG
PY 1998
VL 14
IS 4
BP 640
EP 650
DI 10.1109/70.704238
PG 11
WC Automation & Control Systems; Engineering, Electrical & Electronic;
Robotics
SC Automation & Control Systems; Engineering; Robotics
GA 104PW
UT WOS:000075023800015
ER
PT J
AU Salkowski, CA
Detore, G
Franks, A
Falk, MC
Vogel, SN
AF Salkowski, CA
Detore, G
Franks, A
Falk, MC
Vogel, SN
TI Pulmonary and hepatic gene expression following cecal ligation and
puncture: Monophosphoryl lipid A prophylaxis attenuates sepsis-induced
cytokine and chemokine expression and neutrophil infiltration
SO INFECTION AND IMMUNITY
LA English
DT Article
ID TUMOR-NECROSIS-FACTOR; MESSENGER-RNA EXPRESSION; COLONY-STIMULATING
FACTOR; INTERCELLULAR-ADHESION MOLECULE-1; MACROPHAGE INFLAMMATORY
PROTEIN-2; INTERFERON-GAMMA-PRODUCTION; NITRIC-OXIDE SYNTHASE;
GRAM-NEGATIVE SEPSIS; IFN-GAMMA; ENDOTOXIN TOLERANCE
AB Polymicrobial sepsis induced by cecal ligation and puncture (CLP) reproduces many of the pathophysiologic features of septic shock In this study, we demonstrate that mRNA for a broad range of pro- and anti-inflammatory cytokine and chemokine genes are temporally regulated after CLP in the lung and liver. We also assessed whether prophylactic administration of monophosphoryl lipid A (MPL), a nontoxic derivative of lipopolysaccharide (LPS) that induces endotoxin tolerance and attenuates the sepsis syndrome in mice after CLP, would alter tissue-specific gene expression post-CLP, Levels of pulmonary interleukin-6 (IL-6), tumor necrosis factor alpha (TNF-alpha), granulocyte colony-stimulating factor (G-CSF), IL-1 receptor antagonist (IL-1ra), and IL-10 mRNA, as well as hepatic IL-1 beta, IL-6, gamma interferon (IFN-gamma), G-CSF, inducible nitric oxide synthase, and IL-10 mRNA, were reduced in MPL-pretreated mice after CLP compared to control mice. Chemokine mRNA expression was also profoundly mitigated in MPL-pretreated mice after CLP. Specifically, levels of pulmonary and hepatic macrophage inflammatory protein 1 alpha (MIP-1 alpha), MIP-1 beta, MIP-2, and monocyte chemoattractant protein-1 (MCP-1) mRNA, as well as hepatic IFN-gamma-inducible protein 10 and KC mRNA, were attenuated in MPC-pretreated mice after CLP, Attenuated levels of IL-6, TNF-alpha, MCP-1, MIP-1 alpha, and MIP-2 in serum also were observed in MPG-pretreated mice after CLP. Diminished pulmonary chemokine mRNA production was associated with reduced neutrophil margination and pulmonary myeloperoxidase activity. These data suggest that prophylactic administration of MPL mitigates the sepsis syndrome by reducing chemokine production and the recruitment of inflammatory cells into tissues, thereby attenuating the production of proinflammatory cytokines.
C1 Uniformed Serv Univ Hlth Sci, Dept Immunol & Microbiol, Bethesda, MD 20814 USA.
USN, Med Res Inst, Resuscitat Med Program, Bethesda, MD 20889 USA.
RP Vogel, SN (reprint author), Uniformed Serv Univ Hlth Sci, Dept Immunol & Microbiol, 4301 Jones Bridge Rd, Bethesda, MD 20814 USA.
EM vogel@usuhsb.usuhs.mil
FU NIAID NIH HHS [R37 AI018797, R01 AI018797, AI-18797, R56 AI018797]
NR 72
TC 104
Z9 109
U1 0
U2 2
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 USA
SN 0019-9567
J9 INFECT IMMUN
JI Infect. Immun.
PD AUG
PY 1998
VL 66
IS 8
BP 3569
EP 3578
PG 10
WC Immunology; Infectious Diseases
SC Immunology; Infectious Diseases
GA 103TJ
UT WOS:000074973700012
PM 9673235
ER
PT J
AU Robinson, GE
AF Robinson, GE
TI Defensive democratization in Jordan
SO INTERNATIONAL JOURNAL OF MIDDLE EAST STUDIES
LA English
DT Article; Proceedings Paper
CT 28th Annual Meeting of the
Middle-East-Studies-Association-of-North-America
CY NOV 19-22, 1994
CL PHOENIX, ARIZONA
SP Middle E Studies Assoc N Amer
C1 USN, Postgrad Sch, Monterey, CA 93943 USA.
Univ Calif Berkeley, Ctr Middle Eastern Studies, Berkeley, CA 94720 USA.
RP Robinson, GE (reprint author), USN, Postgrad Sch, Monterey, CA 93943 USA.
NR 51
TC 30
Z9 30
U1 0
U2 0
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 USA
SN 0020-7438
J9 INT J MIDDLE E STUD
JI Int. J. Middle East Stud.
PD AUG
PY 1998
VL 30
IS 3
BP 387
EP 410
PG 24
WC Area Studies
SC Area Studies
GA 108TY
UT WOS:000075282600005
ER
PT J
AU Roy, DNG
Warner, J
Couchman, LS
Shirron, J
AF Roy, DNG
Warner, J
Couchman, LS
Shirron, J
TI Inverse obstacle transmission problem in acoustics
SO INVERSE PROBLEMS
LA English
DT Article
ID SCATTERING; DOMAIN; TOMOGRAPHY; BOUNDARY
AB The results of inverse scattering of plane acoustic waves from penetrable, homogeneous acoustic obstacles in two space dimensions are reported. The shape and the material parameters of the obstacles are recovered from both 360 degrees and limited-aperture, far-field patterns in the presence of random noise. The forward problem is solved via a combination of shape differentiation of the scattered field and the Pade approximation. Not being an integral equation based approach, the method is free of the non-uniqueness problem associated with the interior eigenvalues of the scatterer. Moreover, it is shown that all necessary scattering and Jacobian calculations need to be performed only with respect to a circle of a fixed radius. In addition, by the construction of the forward solution, the objective unction to be minimized for inversion does not contain terms arising from the boundary conditions. This, along with the fact that the domain of calculations remains invariant to the stage of iteration, results in a substantial simplification in the implementation of a Gauss-Newton type of inversion procedure which is used here. Finally, the method is illustrated with several transmission obstacles of various shapes and with different initial conditions.
C1 SFA Inc, Landover, MD 20785 USA.
USN, Res Lab, Phys Acoust Branch, Washington, DC 20375 USA.
RP Roy, DNG (reprint author), SFA Inc, 1401 McCormick Dr, Landover, MD 20785 USA.
NR 30
TC 6
Z9 6
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0266-5611
J9 INVERSE PROBL
JI Inverse Probl.
PD AUG
PY 1998
VL 14
IS 4
BP 903
EP 929
DI 10.1088/0266-5611/14/4/010
PG 27
WC Mathematics, Applied; Physics, Mathematical
SC Mathematics; Physics
GA 113LE
UT WOS:000075551800010
ER
PT J
AU Turk, J
Vivekanandan, J
Lee, T
Durkee, P
Nielsen, K
AF Turk, J
Vivekanandan, J
Lee, T
Durkee, P
Nielsen, K
TI Derivation and applications of near-infrared cloud reflectances from
GOES-8 and GOES-9
SO JOURNAL OF APPLIED METEOROLOGY
LA English
DT Article
ID RADIATION MEASUREMENTS; SOLAR-RADIATION; RETRIEVAL; IMAGERY; SURFACE;
FOG
AB Recent deployments of the National Oceanic and Atmospheric Administration (NOAA) Geostationary Operational Environmental Satellites (GOES-8 and -9) include full-time 3.9-mu m imaging capabilities. This shortwave (near infrared) channel has been available at 3.7 mu m on the Advanced Very High Resolution Radiometer (AVHRR) instrument aboard the NOAA polar-orbiting satellite systems. In this spectral region, daytime satellite-observed radiances include contributions from both the reflected solar radiation and the emitted thermal emission. In particular, typical stratus and fog clouds posess near-infrared emissivities less than unity, which requires special processing to account for the angular dependence of the solar reflection. In this paper, a side-by-side comparison of time-coincident GOES-and AVHRR-derived near-infrared cloud reflectance is carried out in order to demonstrate the capability of GOES-8 and -9 in both identifying and characterizing the microphysics of stratus and fog clouds during the daytime.
The authors first present the mathematical formalism and then apply the technique to extract the near-infrared reflectances from GOES-8 and -9 data. The technique is applicable for operational usage and requires a lookup table to account for the continuously changing sun-satellite viewing geometry. Near-infrared cloud reflectances are extracted from coincident GOES-9 and AVHRR data from both NOM-14 and -12 for different times of day and are verified against theoretical reflectances derived from radiative transfer theory and previously published results. A retrieval of the cloud drop size distribution effective radius is demonstrated on satellite data along coastal California during the summer of 1996.
C1 USN, Res Lab, Marine Meteorol Div, Monterey, CA 93943 USA.
RP Turk, J (reprint author), USN, Res Lab, Marine Meteorol Div, 7 Grace Hopper Ave, Monterey, CA 93943 USA.
NR 17
TC 11
Z9 13
U1 0
U2 0
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0894-8763
J9 J APPL METEOROL
JI J. Appl. Meteorol.
PD AUG
PY 1998
VL 37
IS 8
BP 819
EP 831
DI 10.1175/1520-0450(1998)037<0819:DAAONI>2.0.CO;2
PG 13
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 106EK
UT WOS:000075116800005
ER
PT J
AU Mason, W
Waterman, JR
AF Mason, W
Waterman, JR
TI Electrical properties of extremely low doped GaSb Schottky diodes
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID MOLECULAR-BEAM EPITAXY; DEEP LEVELS; SPECTROSCOPY
AB This article presents capacitance-voltage (C/V), current-voltage (J/V), and deep level spectroscopy (DLTS) measurements on Al/GaSb Schottky diodes; the GaSb was doped n type using a Ga2Te3 source. We found a net doping density of 1.71x10(15) cm(-3) and a barrier height of 0.436 eV from the C/V measurements. At room temperature, the J/V characteristics gave an ideality factor of 1.2 and an apparent barrier height of 0.48 eV. DLTS measurements showed a single peak in the capacitance at about 80 K, giving an activation energy of 0.219 eV. This value is comparable to the value seen in Te-doped GaSb Schottky diodes doped with other sources and in undoped GaSb. (C) 1998 American Institute of Physics.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Mason, W (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 15
TC 7
Z9 7
U1 0
U2 3
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD AUG 1
PY 1998
VL 84
IS 3
BP 1426
EP 1429
DI 10.1063/1.368177
PG 4
WC Physics, Applied
SC Physics
GA 108YT
UT WOS:000075294600043
ER
PT J
AU Kaihatu, JM
Handler, RA
Marmorino, GO
Shay, LK
AF Kaihatu, JM
Handler, RA
Marmorino, GO
Shay, LK
TI Empirical orthogonal function analysis of ocean surface currents using
complex and real-vector methods
SO JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY
LA English
DT Article
ID WIND; DYNAMICS; RADAR
AB Empirical orthogonal function (EOF) analysis has been widely used in meteorology and oceanography to extract dominant modes of behavior in scalar and vector datasets. For analysis of two-dimensional vector fields, such as surface winds or currents, use of the complex EOF method has become widespread. In the present paper, this method is compared with a real-vector EOF method that apparently has previously been unused for current or wind fields in oceanography or meteorology. It is shown that these two methods differ primarily with respect to the concept of optimal representation. Further, the real-vector analysis can easily be extended to three-dimensional vector fields, whereas the complex method cannot. To illustrate the differences between approaches. both methods are applied to Ocean Surface Current Radar data collected off Cape Hatteras, North Carolina, in June and July 1993. For this dataset, while the complex analysis "converges" in fewer modes, the real analysis is better able to isolate flows with wide cross-shelf structures such as tides.
C1 USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Dept Meteorol & Phys Oceanog, Miami, FL 33149 USA.
RP Kaihatu, JM (reprint author), USN, Res Lab, Div Oceanog, Code 7320, Stennis Space Ctr, MS 39529 USA.
EM kaihatu@taurus.nrlsc.navy.mil
RI Kaihatu, James/H-7561-2016
OI Kaihatu, James/0000-0002-9277-6409
NR 28
TC 59
Z9 61
U1 1
U2 7
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0739-0572
J9 J ATMOS OCEAN TECH
JI J. Atmos. Ocean. Technol.
PD AUG
PY 1998
VL 15
IS 4
BP 927
EP 941
DI 10.1175/1520-0426(1998)015<0927:EOFAOO>2.0.CO;2
PG 15
WC Engineering, Ocean; Meteorology & Atmospheric Sciences
SC Engineering; Meteorology & Atmospheric Sciences
GA 107WK
UT WOS:000075233800007
ER
PT J
AU Sobel, DO
Goyal, D
Ahvazi, B
Yoon, JW
Chung, YH
Bagg, A
Harlan, DM
AF Sobel, DO
Goyal, D
Ahvazi, B
Yoon, JW
Chung, YH
Bagg, A
Harlan, DM
TI Low dose poly I : C prevents diabetes in the diabetes prone BB rat
SO JOURNAL OF AUTOIMMUNITY
LA English
DT Article
DE BB rat; poly I : C; IDDM; cytokines; immunoregulatory cell
ID TUMOR-NECROSIS-FACTOR; SUPPRESSOR T-CELL; NOD MICE;
MONOCLONAL-ANTIBODIES; INTERFERON-GAMMA; FREUND ADJUVANT; LYMPHOCYTES-T;
FACTOR-ALPHA; TNF-ALPHA; EXPRESSION
AB Poly I:C, an inducer of IFN-alpha and other cytokines, has been used to study the development of diabetes in both the BioBreeding (BB) diabetes prone rat and non-obese diabetic (NOD) mouse animal models of insulin-dependent diabetes mellitus (IDDM). Surprisingly, poly I:C accelerates the disease in the BB rat while inhibiting it in the NOD mouse. Since cytokines can have dose related opposing effects on immune responses, we hypothesized that the paradoxical effect of polyinosinic polycytidylic acid (poly I:C) on diabetes in the two animal models is dose related. Accordingly, we compared the incidence of diabetes and degree of insulitis in diabetes prone BB rats administered saline and poly I:C at doses (0.05 mu g/g body weight and 0.1 mu g/g body weight) up to 100-fold lower than doses (poly5 mu g/g) previously found to accelerate diabetes. In addition, the non-specific suppressor activity of mononuclear splenocytes from BB rats administered low dose (poly-0.05 mu g/g body weight), high dose (poly-5 mu g/g body weight), and saline were compared. The development of diabetes was inhibited in rats treated with each dose of poly I:C. The degree of insulitis in poly-I:C treated animals was also less severe. The total white blood cell count and proportion of RT6(+) T-cells and each T-cell subset were unaltered by poly I:C. When compared to splenocytes of control animals, splenocytes from poly I:C (0.05 mu g/g body weight) treated rats suppressed responder cell proliferation to concanavalin A and alloantigen. However, spleen cells from high dose poly-I:C did not suppress responder cell proliferation to alloantigen. In adoptive transfer studies, the administration of spleen cells from poly-0.05 treated rats decreased the development of diabetes in recipient BB rats. In vitro studies also demonstrated that poly-I:C inhibits the proliferative response of BB rat spleen cells to concanavalin A. The administration of poly-0.05, but not poly-5.0, decreased TNF-alpha mRNA and IL-10 mRNA content in spleen cells. We conclude that poly I:C, at a dose 100 times lower than that required to accelerate diabetes prevents the development of diabetes in BB rates by interfering with the development of insulitis. The induction of suppressor cell activity induced by low dose poly-I:C in vivo and the inhibition of T-cell responses by poly-I:C in vitro suggests that the diabetes sparing activity of poly I:C is mediated by augmented immunoregulatory cell activity. Further studies with poly I:C may be important in increasing our understanding of the pathogenesis of IDDM and provide a means to prevent it. (C) 1998 Academic Press.
C1 Georgetown Univ, Sch Med, Washington, DC 20007 USA.
USN, Med Res Inst, Bethesda, MD 20889 USA.
Julia McFarlane Diabet Univ Calgary, Calgary, AB, Canada.
RP Sobel, DO (reprint author), Georgetown Univ, Childrens Med Ctr, Div Pediat Endocrinol & Metab, 3800 Reservoir Rd NW, Washington, DC 20007 USA.
NR 45
TC 44
Z9 45
U1 0
U2 1
PU ACADEMIC PRESS LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0896-8411
J9 J AUTOIMMUN
JI J. Autoimmun.
PD AUG
PY 1998
VL 11
IS 4
BP 343
EP 352
DI 10.1006/jaut.1998.0203
PG 10
WC Immunology
SC Immunology
GA 118AR
UT WOS:000075815500007
PM 9776712
ER
PT J
AU McClatchey, SK
AF McClatchey, SK
TI Intraocular lens calculator for childhood cataract
SO JOURNAL OF CATARACT AND REFRACTIVE SURGERY
LA English
DT Article; Proceedings Paper
CT Annual Meeting of the
American-Association-for-Pediatric-Ophthalmology-and-Strabismus
CY APR, 1997
CL CHARLESTON, SOUTH CAROLINA
SP Amer Assoc Pediat Ophthalmol & Strabismus
ID OCULAR GROWTH; IMPLANTATION; CHILDREN; PSEUDOPHAKIA; EYES; MANAGEMENT;
CAPSULE; POWER
AB Purpose; To evaluate a computer program to predict the pseudophakic refraction of evaluate a com child at any age.
Setting: A pediatric ophthalmology practice.
Methods: A computer program was written for Windows 95 that,calculates the initial postoperative pseudophakic refraction of a child using Holiday's formula, given the axial length and keratometry readings. The logarithmic model was used. to predict the ultimate refraction at age 20 years and chart the predicted curve of retractive error with standard deviations.
Results: The program provided a graph of a child's predicted pseudophakic refraction versus age that would allow the surgeon to dynamically view the effects of changing the intraocular lens (IOL) power.
Conclusions: If pseudophakia and aphakia have the same effect on the growth of the child, this program should accurately predict the myopic shift of a pseudophakic 1 child. This could help guide the surgeon's choice of IOL power.
C1 USN, Med Ctr, Dept Ophthalmol, San Diego, CA 92134 USA.
RP McClatchey, SK (reprint author), USN, Med Ctr, Dept Ophthalmol, San Diego, CA 92134 USA.
NR 23
TC 17
Z9 20
U1 0
U2 0
PU AMER SOC CATARACT REFRACTIVE SURGERY
PI FAIRFAX
PA 4000 LEGATO RD, SUITE 850, FAIRFAX, VA 22030 USA
SN 0886-3350
J9 J CATARACT REFR SURG
JI J. Cataract. Refract. Surg.
PD AUG
PY 1998
VL 24
IS 8
BP 1125
EP 1129
PG 5
WC Ophthalmology; Surgery
SC Ophthalmology; Surgery
GA 111AU
UT WOS:000075415800021
PM 9719974
ER
PT J
AU Li, SH
Huang, FL
Feng, QP
Liu, J
Fan, SX
McKenna, TM
AF Li, SH
Huang, FL
Feng, QP
Liu, J
Fan, SX
McKenna, TM
TI Overexpression of protein kinase C alpha enhances
lipopolysaccharide-induced nitric oxide formation in vascular smooth
muscle cells
SO JOURNAL OF CELLULAR PHYSIOLOGY
LA English
DT Article
ID NF-KAPPA-B; L-ARGININE TRANSPORT; PHORBOL ESTERS; ENDOTHELIAL-CELLS;
SYNTHASE ACTIVITY; MESSENGER-RNA; NO SYNTHASE; EXPRESSION; INDUCTION;
RAT
AB Our previous studies showed that lipopolysaccharide (LPS)-induced nitric oxide (NO) synthesis in cardiovascular tissues is attenuated by protein kinase C (PKC) inhibitors. In the current study, we identify a specific PKC isotype involved in the LPS signal transduction pathway that leads to NO formation in rat vascular smooth muscle cells (VSMC). VSMC were transfected with a mammalian expression vector containing a full length PKC alpha cDNA insert, and a stable transfectant overexpressing PKC alpha was obtained as evidenced by increased expression of PKC alpha mRNA and protein. In response to 100 ng/ml LPS stimulation, the PKC alpha transfectants showed a 1.8-fold increase in PKC activity at 30 min and a twofold increase in NO production over 24 hr compared with cells transfected with control plasmids. The LPS-stimulated increase in NO synthesis in PKC alpha transfectants was blocked by the specific PKC alpha inhibitor Ga 6976. After 6 hr LPS treatment, PKC alpha-transfected and control cells showed equivalent increases in mRNA and protein for the inducible NO synthase. NO synthase activity of the cell extracts assayed in the presence of excess substrate and cofactors was not significantly different between PKC alpha-transfected and control cells after LPS stimulation. However, mRNA levels for GTP cyclohydrolase I, a key enzyme in (GR)-tetrahydro-L-biopterin synthesis, and cationic amino acid transporter-2, involved in L-arginine transport, was enhanced in cells overexpressing PKC alpha compared with control cells. These results suggest that PKC alpha plays an important role in LPS-induced NO formation and that a significant portion of this effect may be by means of enhanced substrate availability to the inducible nitric oxide synthase enzyme. (C) 1998 Wiley-Liss, Inc.
C1 NICHHD, Endocrinol & Reprod Res Branch, NIH, Bethesda, MD 20892 USA.
USN, Res Inst, Resuscitat Med Program, Bethesda, MD USA.
Univ Western Ontario, Dept Pharmacol & Toxicol, London, ON, Canada.
RP Li, SH (reprint author), John P Robarts Res Inst, Vasc Biol Grp, 100 Perth Dr, London, ON N6A 5K8, Canada.
EM shli@rri.on.ca
NR 49
TC 20
Z9 24
U1 0
U2 0
PU WILEY-LISS
PI NEW YORK
PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA
SN 0021-9541
J9 J CELL PHYSIOL
JI J. Cell. Physiol.
PD AUG
PY 1998
VL 176
IS 2
BP 402
EP 411
DI 10.1002/(SICI)1097-4652(199808)176:2<402::AID-JCP19>3.0.CO;2-4
PG 10
WC Cell Biology; Physiology
SC Cell Biology; Physiology
GA ZV411
UT WOS:000074301900019
PM 9648928
ER
PT J
AU Twigg, ME
Bennett, BR
Magno, R
AF Twigg, ME
Bennett, BR
Magno, R
TI Morphological instability in InAs/GaSb heterostructures
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article
DE morphological instability; molecular beam epitaxy; transmission electron
microscopy; surface diffusion; compound semiconductors
ID ENERGY ELECTRON-DIFFRACTION; MOLECULAR-BEAM EPITAXY; FREE SOLID FILMS;
SURFACE-DIFFUSION; CRITICAL THICKNESS; GROWTH; SUPERLATTICES; INTERFACE;
LAYER; GASB
AB Using transmission electron microscopy, reflection electron microscopy, and atomic force microscopy, we have examined InAs layers grown on (1 0 0)GaSb using molecular beam epitaxy at temperatures ranging from 400 to 500 degrees C and at growth rates ranging from 0.03 to 0.09 monolayers/s. We have found that for lower growth rates and higher temperatures, nominally 8 monolayer InAs layers experience long-wavelength (>100 nm) small amplitude (similar to 1 nm) surface undulations. From linear stability theory, we find that the appearance of these undulations is consistent with large cation surface diffusion lengths that have been measured by other researchers using scanning reflection high-energy electron diffraction. It also appears, however, that there is no kinetic critical thickness for morphological instability of the InAs layer. (C) 1998 Elsevier Science B.V. All rights reserved.
C1 USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
RP Twigg, ME (reprint author), USN, Res Lab, Div Elect Sci & Technol, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM twigg@estd.nrl.navy.mil
RI Bennett, Brian/A-8850-2008
OI Bennett, Brian/0000-0002-2437-4213
NR 41
TC 5
Z9 5
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 AUG
PY 1998
VL 191
IS 4
BP 651
EP 662
DI 10.1016/S0022-0248(98)00388-1
PG 12
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA 115WE
UT WOS:000075688600010
ER
PT J
AU Breitenstein, DS
Shaw, CC
AF Breitenstein, DS
Shaw, CC
TI Comparison of three tissue composition measurement techniques using
digital mammograms - A signal-to-noise study
SO JOURNAL OF DIGITAL IMAGING
LA English
DT Article
ID DUAL-ENERGY MAMMOGRAPHY; BREAST-CANCER RISK; COMPUTED RADIOGRAPHY;
IMAGING-SYSTEM; DENSITIES; CLASSIFICATION; DECOMPOSITION
AB Tissue composition measurement may provide a quantitatively and physically meaningful method to objectively determine the "mammographic density" linked to breast cancer risk. A single energy hybrid (SEH) technique is described for measuring the tissue composition on a pixel-by-pixel basis with a single digital mammogram. Theoretical models were derived and used to compute signal-to-noise ratios (SNRs) in tissue composition measurement using the SEH method. The results were compared with those computed for measurements using the dual kVp and dual screen methods. SNRs were theoretically related to the pixel area, total unattenuated detector exposure and fluence spectra of the incident X-rays. SNRs were computed for measurement of the adipose tissue thickness for a 6 cm thick breast, consisting of 50% of adipose tissue and 50% of glandular tissue. Effects of kVp and prepatient filtration were studied by computing the SNRs for various kVps and filters and optimal kVps and filters are determined. The results showed that the SNRs obtained with the SEH method is an order of magnitude better than the dual kVp method, which, in turn, is an order of magnitude better than the dual screen method. When using the optimal kVp's and no prepatient filtration, the SNRs were computed to be 84.2, 13.2, and 2.0 for the SEH, dual kVp, and dual screen methods, respectively. Prepatient filtration can improve the SNR by as much as 35% for the dual kVp and dual screen techniques with reasonable tube loading factors(8-10). Copyright (C) 1998 by W.B. Saunders Company.
C1 Univ Pittsburgh, Dept Radiol, Pittsburgh, PA 15261 USA.
USN, Ctr Surface Warfare, Dahlgren Div, Dahlgren, VA USA.
RP Shaw, CC (reprint author), Univ Pittsburgh, Dept Radiol, A439 Scaife Hall, Pittsburgh, PA 15261 USA.
FU NCI NIH HHS [CA 51248]
NR 33
TC 7
Z9 7
U1 0
U2 0
PU W B SAUNDERS CO
PI PHILADELPHIA
PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA
19106-3399 USA
SN 0897-1889
J9 J DIGIT IMAGING
JI J. Digit. Imaging
PD AUG
PY 1998
VL 11
IS 3
BP 137
EP 150
PG 14
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA 110MP
UT WOS:000075385200005
PM 9718504
ER
PT J
AU Chakrabarti, K
Bandyopadhyay, PK
Barkyoumb, JH
AF Chakrabarti, K
Bandyopadhyay, PK
Barkyoumb, JH
TI Copper doped alkali halides for computed radiography and digital imaging
SO JOURNAL OF DIGITAL IMAGING
LA English
DT Article; Proceedings Paper
CT Annual Meeting of the Society-for-Computer-Applications-in-Radiology
CY JUN 04-07, 1998
CL BALTIMORE, MD
SP Soc Comp Applicat Radiol (SCAR), Amer Coll Radiol (ACR)
ID THERMALLY STIMULATED LUMINESCENCE
AB We report here the results of our x-ray fluorescence, photostimulated luminescence, and time resolved laser spectroscopy studies in KCl:Cu. This material seems to possess some desirable properties for being used as an imaging plate in computed radiography.
This is a US government work. There are no restrictions on its use.
C1 US FDA, Div Mammog Qual & Radiat Programs, Rockville, MD 20902 USA.
Hendrix Coll, Conway, AR USA.
USN, Ctr Surface Warfare, Carderock Div, Bethesda, MD USA.
RP Chakrabarti, K (reprint author), US FDA, Div Mammog Qual & Radiat Programs, 1350 Piccard Dr, Rockville, MD 20902 USA.
NR 17
TC 2
Z9 3
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0897-1889
EI 1618-727X
J9 J DIGIT IMAGING
JI J. Digit. Imaging
PD AUG
PY 1998
VL 11
IS 3
SU 1
BP 174
EP 177
PG 4
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA 111NH
UT WOS:000075443600052
PM 9735463
ER
PT J
AU Meier, RR
Nicholas, AC
Picone, JM
Melendez-Alvira, DJ
Ganguli, GI
Reynolds, MA
Roelof, EC
AF Meier, RR
Nicholas, AC
Picone, JM
Melendez-Alvira, DJ
Ganguli, GI
Reynolds, MA
Roelof, EC
TI Inversion of plasmaspheric EUV remote sensing data from the STP 72-1
satellite
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID HE-II 304-A; OUTER PLASMASPHERE; HELIUM; RADIATION; MAGNETOSPHERE;
DENSITY; MODEL
AB Observations of the extreme ultraviolet emission of helium ions at 30.4 nm can be used to study the global shape of the plasmasphere and its dynamical response to geomagnetic forcing. In order to retrieve number densities of plasmaspheric He+ from such observations, we have developed a new inversion technique based on discrete inverse theory, which uses the optical data to optimize a parameterized model of the He+ distribution. We apply this inversion technique to several orbits of data obtained from the Naval Research Laboratory extreme ultraviolet photometric experiment launched on the STP 72-1 satellite in October 1972. The inversion is limited to nighttime conditions where contamination from the topside ionosphere is minimal and where a simple parameterization of the He+ number density is applicable. We obtain excellent fits to the data; however, some of the retrieved model parameters have large uncertainties due to inadequate sampling of the plasmasphere. Our study shows that improved sampling using observations from different locations and view directions would significantly enhance the accuracy of the retrieved model parameters. Using a newly developed three-dimensional imaging tool to visualize the plasmaspheric regions being sampled remotely, we demonstrate that emission features observed from two of the STP 72-1 orbits originate beyond the plasmasphere. Estimated number densities of this feature are roughly consistent with observations of cold plasma seen at geosynchronous orbit by in situ experiments.
C1 USN, EO Hulburt Ctr Space Res, Res Lab, Washington, DC 20375 USA.
USN, Div Plasma Phys, Res Lab, Washington, DC 20375 USA.
Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA.
Praxis Inc, Alexandria, VA USA.
RP Meier, RR (reprint author), USN, EO Hulburt Ctr Space Res, Res Lab, Code 7640, Washington, DC 20375 USA.
RI Meier, Robert/G-4749-2014
OI Meier, Robert/0000-0001-8497-7115
NR 38
TC 13
Z9 13
U1 0
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD AUG 1
PY 1998
VL 103
IS A8
BP 17505
EP 17518
DI 10.1029/98JA01175
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 107BV
UT WOS:000075186700025
ER
PT J
AU Baird, JK
Masbar, S
Basri, H
Tirtokusumo, S
Subianto, B
Hoffman, SL
AF Baird, JK
Masbar, S
Basri, H
Tirtokusumo, S
Subianto, B
Hoffman, SL
TI Age-dependent susceptibility to severe disease with primary exposure to
Plasmodium falciparum
SO JOURNAL OF INFECTIOUS DISEASES
LA English
DT Article
ID MALARIA; MORTALITY
AB This study investigated the incidence of severe disease following primary exposure to Plasmodium falciparum by nonimmune children and adults in Irian Jaya, Indonesia. Four months after arrival, the cross-sectional prevalence of P, falciparum was 72%, and the monthly cumulative incidence of clinical diagnoses of malaria was 81%. Delirium or unconsciousness prompted evacuation to the hospital. Records of emergency evacuation of persons with a clinical diagnosis of malaria revealed an incidence density among adults (>15 years) of 1.34 events/person-year in the third month, whereas the rate in children remained stable at similar to 0.25 events/person-year (relative risk = 4.51, 95% confidence interval [CI] = 1.94-11), Through the first 6 months of exposure, 23.2% of adults were evacuated to the hospital with a diagnosis of malaria compared with 8.6% of children (relative risk = 2.7, 95% CI = 1.9-3.8). In this population with relatively few infants or people of advanced age, the risk of severe disease following primary exposure to P. falciparum increased with age.
C1 USN, Med Res Inst, Malaria Program, Rockville, MD 20852 USA.
USN, Med Res Unit 2, Jakarta, Indonesia.
DINAS Kesehatan, Prov Hlth Serv, Abebura, Irian Jaya, Indonesia.
RP Baird, JK (reprint author), USN, Med Res Inst, Malaria Program, 12300 Washington Ave, Rockville, MD 20852 USA.
NR 15
TC 44
Z9 45
U1 0
U2 1
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 5801 S ELLIS AVENUE, CHICAGO, IL 60637 USA
SN 0022-1899
J9 J INFECT DIS
JI J. Infect. Dis.
PD AUG
PY 1998
VL 178
IS 2
BP 592
EP 595
PG 4
WC Immunology; Infectious Diseases; Microbiology
SC Immunology; Infectious Diseases; Microbiology
GA 103JA
UT WOS:000075153000047
PM 9697752
ER
PT J
AU Zanoria, ES
Watkins, TR
Breder, K
Riester, L
Bashkansky, M
Reintjes, J
Sun, JG
Ellingson, WA
Blau, PJ
AF Zanoria, ES
Watkins, TR
Breder, K
Riester, L
Bashkansky, M
Reintjes, J
Sun, JG
Ellingson, WA
Blau, PJ
TI Assessment of techniques for characterizing the surface quality of
ground silicon nitride
SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
LA English
DT Article
DE grinding; silicon nitride; surface characterization; surface wear
ID SUBSURFACE DEFECT DETECTION; RESIDUAL-STRESS; CERAMICS; DAMAGE
AB This study evaluates techniques used to detect and quantify the extent of surface and subsurface damage in ground silicon nitride, Specimens of two differently ground surfaces of a hot isostatically pressed (HIP) silicon nitride, commercially designated as GS-44, were subjected to six types of analyses, namely mechanical stylus profiling, atomic force microscopy, point-counting analysis of fragmentation pits, laser-light scattering, optical gating, and grazing incidence x-ray diffraction (GIXD), The results of these investigations are compared and discussed. The techniques providing the dearest correlations with grinding conditions were mechanical stylus roughness, fragmentation analysis, and GIXD (residual stress conditions). Those that exhibited some correlation but appear to require more work to develop a reliable evaluation method were laser scattering and optical gating, Atomic force microscopy was useful, but not as a routine investigative tool for quality control in ceramic machining. The techniques that appear to have the most near-term potential for routine use are fragmentation analysis and optical gating, Laser-based optical scattering exhibits potential for routine application, but, more development is needed for its commercialization.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
USN, Res Lab, Washington, DC 20375 USA.
Argonne Natl Lab, Argonne, IL 60439 USA.
RP Zanoria, ES (reprint author), Caterpillar Inc, PPG, Peoria, IL 61656 USA.
RI Watkins, Thomas/D-8750-2016
OI Watkins, Thomas/0000-0002-2646-1329
NR 26
TC 2
Z9 2
U1 0
U2 0
PU ASM INTERNATIONAL
PI MATERIALS PARK
PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002
USA
SN 1059-9495
J9 J MATER ENG PERFORM
JI J. Mater. Eng. Perform.
PD AUG
PY 1998
VL 7
IS 4
BP 533
EP 547
DI 10.1361/105994998770347693
PG 15
WC Materials Science, Multidisciplinary
SC Materials Science
GA 106DW
UT WOS:000075115500013
ER
PT J
AU Cooper, KP
Slebodnick, PL
Lucas, KE
Hogan, EA
AF Cooper, KP
Slebodnick, PL
Lucas, KE
Hogan, EA
TI Microstructural inhomogeneities and sea water corrosion in
laser-deposited Ti-6Al-4V alloy matrix/carbide particulate composite
surfaces
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Article
AB Metal matrix/carbide particulate composite surface layers were produced on Ti-6Al-4V alloy samples by injecting metal carbide particles into laser-melted surfaces followed by rapid solidification. Hard, wear-resistant surfaces were produced on a strong alloy which normal ly has poor wear resistance. The corrosion behaviour of the composite surface was evaluated after a month's exposure to flowing sea water. A variety of solidification products was found in the laser-deposited surface layers, but corrosion was observed only in the carbide particulate phase in the WC-injected sample. No corrosion was observed in the TiC-injected sample nor in the Ti-6Al-4V base alloy. Corrosion in the WC-injected sample was related to the formation of a narrow interphase zone surrounding the particulate phase and a thin reaction zone on the surface of the particulate phase during solidification. The titanium-rich interphase zone formed a galvanic couple with the WC particulate. Crevice-type corrosion initiated at the interface between the two phases and proceeded into the particulate phase assisted by the reaction zone. Electrochemical test results revealed a high corrosion rate for the WC-injected sample and almost none for both the TiC-injected sample and the Ti-6A1-4V base alloy, confirming the microstructural observations. (C) 1998 Kluwer Academic Publishers.
C1 USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA.
USN, Res Lab, Marine Corros Facil, Key W, FL 33040 USA.
Geocenters Inc, Ft Washington, MD 20744 USA.
RP Cooper, KP (reprint author), USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA.
NR 13
TC 10
Z9 11
U1 1
U2 5
PU KLUWER ACADEMIC PUBL
PI DORDRECHT
PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS
SN 0022-2461
J9 J MATER SCI
JI J. Mater. Sci.
PD AUG 1
PY 1998
VL 33
IS 15
BP 3805
EP 3816
DI 10.1023/A:1004682915135
PG 12
WC Materials Science, Multidisciplinary
SC Materials Science
GA 149DZ
UT WOS:000077591000005
ER
PT J
AU Gaber, BP
AF Gaber, BP
TI Space, time and complexity in biomembrane models
SO JOURNAL OF MOLECULAR GRAPHICS & MODELLING
LA English
DT Meeting Abstract
C1 USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 USA
SN 1093-3263
J9 J MOL GRAPH MODEL
JI J. Mol. Graph.
PD AUG-DEC
PY 1998
VL 16
IS 4-6
BP 289
EP 289
PG 1
WC Biochemical Research Methods; Biochemistry & Molecular Biology; Computer
Science, Interdisciplinary Applications; Crystallography; Mathematical &
Computational Biology
SC Biochemistry & Molecular Biology; Computer Science; Crystallography;
Mathematical & Computational Biology
GA 248ZK
UT WOS:000083306500067
ER
PT J
AU Stenger, DA
Hickman, JJ
Bateman, KE
Ravenscroft, MS
Ma, W
Pancrazio, JJ
Shaffer, K
Schaffner, AE
Cribbs, DH
Cotman, CW
AF Stenger, DA
Hickman, JJ
Bateman, KE
Ravenscroft, MS
Ma, W
Pancrazio, JJ
Shaffer, K
Schaffner, AE
Cribbs, DH
Cotman, CW
TI Microlithographic determination of axonal/dendritic polarity in cultured
hippocampal neurons
SO JOURNAL OF NEUROSCIENCE METHODS
LA English
DT Article
DE hippocampal neuron; neuronal polarity; self-assembled monolayers
ID SELF-ASSEMBLED MONOLAYERS; GROWTH; EXPRESSION; SURVIVAL; GUIDANCE;
SURFACES; NETWORKS; ADHESION; CELLS
AB High resolution substrates, created using patterned self-assembled monolayers, are shown to direct axonal and dendritic process extension at the level of a single hippocampal neuron. Areas and dendrites were identified using morphological characteristics and immunocytochemical markers. Patterns were formed on glass coverslips from a co-planar monolayer of cell adhesive aminosilanes and non-adhesive fluorinated silanes. On patterned surfaces, the percentage of the total number of cells attached to the 0.71 mm(2) substrate field with compliance to the 25-mu m diameter 'somal adhesion site' reached 41 +/- 7% (mean +/- S.D., 428 cells counted). A total of 76 +/- 11% of cells that adhered to a somal attachment site developed a lone process greater than or equal to 100 mu m oriented in the direction of the continuous aminosilane pathway which was shown to express axonal markers, dells on either the fluorinated silane, which is non-permissive for neurite outgrowth, or localized on a:? aminosilane region only 5 mu m wide failed to extend major processes. This approach is amenable to a variety of industry standard fabrication techniques and may be used to study the role of fine scale spatial cues in neuronal development and synapse formation. (C) 1998 Elsevier Science B,V. All rights reserved.
C1 USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
Sci Applicat Int Corp, Rockville, MD 20850 USA.
NICHD, Dev Neurobiol Lab, NIH, Bethesda, MD 20892 USA.
NINDS, Neurophysiol Lab, NIH, Bethesda, MD 20892 USA.
Univ Calif Irvine, Inst Brain Aging & Dementia, Irvine, CA 92717 USA.
RP Stenger, DA (reprint author), USN, Res Lab, Ctr Biomol Sci & Engn, Code 6910, Washington, DC 20375 USA.
RI Pancrazio, Joseph/M-3206-2015
OI Pancrazio, Joseph/0000-0001-8276-3690
NR 31
TC 119
Z9 122
U1 1
U2 10
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0165-0270
J9 J NEUROSCI METH
JI J. Neurosci. Methods
PD AUG 1
PY 1998
VL 82
IS 2
BP 167
EP 173
DI 10.1016/S0165-0270(98)00047-8
PG 7
WC Biochemical Research Methods; Neurosciences
SC Biochemistry & Molecular Biology; Neurosciences & Neurology
GA 113LV
UT WOS:000075553200006
PM 9700689
ER
PT J
AU Ngai, KL
Riande, E
AF Ngai, KL
Riande, E
TI Proceedings of the third international discussion meeting on relaxations
in complex systems - Vigo, Spain, 30 June 11 July 1997 - Preface
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Editorial Material
C1 USN, Res Lab, Washington, DC 20375 USA.
CSIC, Inst Ciencia Tecnol Polimeros, Madrid, Spain.
RP Ngai, KL (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 0
TC 0
Z9 0
U1 0
U2 2
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 AUG
PY 1998
VL 235
BP VII
EP VIII
PG 2
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 118LC
UT WOS:000075838800001
ER
PT J
AU Yagihara, S
Yamada, M
Asano, M
Kanai, Y
Shinyashiki, N
Mashimo, S
Ngai, KL
AF Yagihara, S
Yamada, M
Asano, M
Kanai, Y
Shinyashiki, N
Mashimo, S
Ngai, KL
TI Dielectric study on beta-relaxation process of tetramethyl-bisphenol-A
polycarbonate
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article; Proceedings Paper
CT 3rd International Discussion Meeting on Relaxations in Complex Systems
CY JUN 30-JUL 11, 1997
CL VIGO, SPAIN
SP J Non Crystalline Solids
ID POLYMERS
AB Dielectric measurements on tetramethyl-bisphenol-A polycarbonate (TMPC), polystyrene (PS), and 50 wt% TMPC/ PS blend were made in the frequency range of 0.1 mHz to 1 MHz at various temperatures. The alpha-relaxation process due to main-chain motions was observed for each polymer and the beta-relaxation processes due to local motions of TMPC were observed for TMPC and TMPC/PS blend. Plots of logarithm of the relaxation time for the beta process against the reciprocal of the absolute temperature were fit to Arrhenius functions for TMPC and the blend. However the relaxation strength and the shape parameter of the Cole-Cole equation had changes around the glass transition temperature, T-g. These changes in relaxation parameters around T-g was observed for the first time for the beta process. Based on these results we suggest that even the local chain motions are affected by the glass transition phenomena, although the beta process are not described by the Vogel-Fulcher-Tamman equation. (C) 1998 Published by Elsevier Science B.V. All rights reserved.
C1 Tokai Univ, Dept Phys, Hiratsuka, Kanagawa 25912, Japan.
USN, Res Lab, Washington, DC 20375 USA.
RP Yagihara, S (reprint author), Tokai Univ, Dept Phys, Hiratsuka, Kanagawa 25912, Japan.
EM yagihara@keyaki.cc.u-tokai.ac.jp
NR 12
TC 17
Z9 17
U1 0
U2 2
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 AUG
PY 1998
VL 235
BP 412
EP 415
DI 10.1016/S0022-3093(98)00511-0
PG 4
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 118LC
UT WOS:000075838800067
ER
PT J
AU Ngai, KL
Rizos, AK
Plazek, DJ
AF Ngai, KL
Rizos, AK
Plazek, DJ
TI Reduction of the glass temperature of thin freely standing polymer films
caused by the decrease of the coupling parameter in the coupling model
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article; Proceedings Paper
CT 3rd International Discussion Meeting on Relaxations in Complex Systems
CY JUN 30-JUL 11, 1997
CL VIGO, SPAIN
SP J Non Crystalline Solids
ID PHOTON-CORRELATION SPECTROSCOPY; MOLECULAR-DYNAMICS SIMULATION;
SEGMENTAL CHAIN DYNAMICS; BULK AMORPHOUS POLYMERS; TIME-SCALE SHIFTS;
THERMORHEOLOGICAL COMPLEXITY; TRANSITION TEMPERATURE; CONSTRAINT
DYNAMICS; NEUTRON-SCATTERING; CHEMICAL-STRUCTURE
AB Dramatic reduction of the glass temperature, T-g, in freely standing polymer thin films has been found when the thickness of the films become approximately smaller than the average end-to-end distance of the unperturbed polymer chains. The observation of a large molecular weight dependence of the T-g reductions provides evidence for the importance of chain confinement effect on the glass temperature of thin polymer films. We propose that for freely standing polymer thin films of high molecular weights, there are: (a) induced orientations of the polymer chains when their average end-to-end distance becomes comparable to the film thickness and (b) decreases of the cooperative length scale for chain segments near the surfaces. As a consequence, the intermolecular constraints of local segmental motions for molecular units are reduced, particularly those located in the vicinity of the surfaces. The reduction of T-g is attributed to an attendant decrease of the coupling parameter in the coupling model. This explanation is consistent with a recent photon correlation spectroscopy (PCS) and quartz crystal microbalance (QCM) measurement of the dynamics of local segmental motions in polymer thin films. Calculation of the T-g of the thin film studied using the coupling model gives an order of magnitude estimate of the reduction of T-g, which is in agreement with experiment. (C) 1998 Elsevier Science B.V, All rights reserved.
C1 USN, Res Lab, Washington, DC 20375 USA.
Univ Crete, Dept Chem, Heraklion 71409, Crete, Greece.
Fdn Res & Technol Hellas, Heraklion 71409, Crete, Greece.
Univ Pittsburgh, Dept Mat Sci & Engn, Pittsburgh, PA 15216 USA.
RP Ngai, KL (reprint author), USN, Res Lab, 4555 Overlook Ave, Washington, DC 20375 USA.
RI Rizos, Apostolos/F-6807-2011
NR 44
TC 65
Z9 67
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD AUG
PY 1998
VL 235
BP 435
EP 443
DI 10.1016/S0022-3093(98)00656-5
PG 9
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 118LC
UT WOS:000075838800071
ER
PT J
AU Santangelo, PG
Roland, CM
AF Santangelo, PG
Roland, CM
TI Effect of long-chain branching on the rheology of 1,4-polyisoprene
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article; Proceedings Paper
CT 3rd International Discussion Meeting on Relaxations in Complex Systems
CY JUN 30-JUL 11, 1997
CL VIGO, SPAIN
SP J Non Crystalline Solids
ID STAR POLYMERS; VISCOELASTIC PROPERTIES; TEMPERATURE-DEPENDENCE; MELT
RHEOLOGY; POLYSTYRENES; REPTATION; POLYISOPRENES; RELAXATIONS;
DIFFUSION; DYNAMICS
AB The presence of long chain branches in 1,4-polyisoprene (PI) is shown to increase the sensitivity of temperature of the terminal relaxation. The excess activation energy associated with branching increases in proportion to the molecular weight of the branches. In these respects, PI behaves like other branched polymers, which means that the reptation-based interpretation of the temperature-dependence of branched polymers cannot be correct. (C) 1998 Elsevier Science B.V. All rights reserved.
C1 USN, Div Chem, Res Lab, Washington, DC 20375 USA.
RP USN, Div Chem, Res Lab, Code 6120, Washington, DC 20375 USA.
EM Roland@nrl.navy.mil
NR 36
TC 14
Z9 14
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
EI 1873-4812
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD AUG
PY 1998
VL 235
BP 709
EP 716
DI 10.1016/S0022-3093(98)00623-1
PG 8
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA 118LC
UT WOS:000075838800117
ER
PT J
AU Nicoll, BK
Peters, RJ
AF Nicoll, BK
Peters, RJ
TI Heat generation during ultrasonic instrumentation of dentin as affected
by different irrigation methods
SO JOURNAL OF PERIODONTOLOGY
LA English
DT Article
DE scaling adverse effects; ultrasonics adverse effects; heat adverse
effects
AB HEAT IS PRODUCED BY MAGNETOSTRICTIVE ultrasonic scalers which may cause injury to pulpal and periodontal tissues. Water coolant flows around the instrument stack and is directed at the instrument tip to reduce the generation of heat. Sound surgical practice requires the use of a sterile coolant for ultrasonic scaling during surgery. Intermittent bulb irrigation is one way to deliver sterile coolant when using ultrasonic scalers not equipped with a dedicated sterile water reservoir. The purpose of this study was to compare the temperature rise in dentin during ultrasonic scaling using either ultrasonic handpiece irrigation or intermittent bulb irrigation. Twenty dentin/cementum root slabs were prepared for each thickness of 0.5, 1.5, and 2.5 mm. A 3.0 mm x 1.5 mm field was outlined on each slab to indicate the area of intended instrumentation, Each slab was mounted such that a thermocouple placed in contact with dentin opposite the area of instrumentation was shielded from irrigation. Twenty samples of each thickness were ultrasonically scaled during which dentin temperature was recorded every 5 seconds over a 30-second period. All 60 slabs were first treated with dental unit ultrasonic handpiece water irrigation, followed by no irrigation, and finally by bulb irrigation with sterile saline. Repeated measures analysis of variance indicated that there were differences among the three treatment groups for temperature change over the course of the study (P < 0.001). Dentin temperature increased with both decreasing slab thickness and with increasing duration of instrumentation. However, only scaling without irrigation produced a rise in dentin temperature from baseline to a level reported as deleterious to pulpal and periodontal tissues. Bulb syringe irrigation delivered as a continuous drip and ultrasonic unit water spray minimized heat generation to physiologically tolerable levels. Intermittent bulb irrigation appears to be a satisfactory alternative to use of ultrasonic scaler water spray for cooling during ultrasonic scaling at surgery.
C1 USN, Sch Dent, Natl Naval Dent Ctr, Comprehens Dent Dept, Bethesda, MD 20889 USA.
USN, Dent Res Inst, Detachment Bethesda, Bethesda, MD 20084 USA.
RP Nicoll, BK (reprint author), USN, Sch Dent, Natl Naval Dent Ctr, Comprehens Dent Dept, 8901 Wisconsin Ave, Bethesda, MD 20889 USA.
NR 19
TC 25
Z9 25
U1 0
U2 1
PU AMER ACAD PERIODONTOLOGY
PI CHICAGO
PA 737 NORTH MICHIGAN AVENUE, SUITE 800, CHICAGO, IL 60611-2690 USA
SN 0022-3492
J9 J PERIODONTOL
JI J. Periodont.
PD AUG
PY 1998
VL 69
IS 8
BP 884
EP 888
PG 5
WC Dentistry, Oral Surgery & Medicine
SC Dentistry, Oral Surgery & Medicine
GA 145PZ
UT WOS:000077381600006
PM 9736371
ER
PT J
AU Sastri, SB
Keller, TM
AF Sastri, SB
Keller, TM
TI Phthalonitrile cure reaction with aromatic diamines
SO JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
LA English
DT Article
DE phthalonitrile monomer; thermoset; curing agent; processability; thermal
stability
ID INTRINSICALLY CONDUCTIVE POLYMER; RESIN
AB Phthalonitrile monomers can be polymerized thermally in the presence of small amounts of curing agents into thermosetting polymers. The thermosets exhibit outstanding thermo-oxidative stability, display good mechanical properties, and offer promise as matrices for composite applications. The phthalonitrile cure reaction is typically accomplished with an aromatic diamine, 1,3-bis(8-aminophenoxy) benzene (m-APB), added in the range of 1.5-2% by weight of the monomer in the melt phase. This article addresses the cure reaction with a sulfone-containing diamine, bis[4-(4-aminophenoxy)phenyl] sulfone (p -BAPS), which shows lower volatility as determined from thermogravimetric studies (TGA) compared to m-APB at the processing temperatures typically employed for phthalonitrile cures. Rheometric studies conducted to monitor the viscosity increase during a cure reaction suggest that the cure reaction with m-APB is faster compared to the reaction with B-BAPS. Even though differences are seen in the initial cure rates, the final cured products are similar in terms of the glass transition temperatures and thermal and oxidative stabilities. (C) 1998 John Wiley & Sons, Inc.
C1 USN, Res Lab, Mat Chem Branch, Div Chem, Washington, DC 20375 USA.
RP Sastri, SB (reprint author), USN, Res Lab, Mat Chem Branch, Div Chem, Code 6127, Washington, DC 20375 USA.
NR 24
TC 83
Z9 89
U1 0
U2 21
PU JOHN WILEY & SONS INC
PI NEW YORK
PA 605 THIRD AVE, NEW YORK, NY 10158-0012 USA
SN 0887-624X
J9 J POLYM SCI POL CHEM
JI J. Polym. Sci. Pol. Chem.
PD AUG
PY 1998
VL 36
IS 11
BP 1885
EP 1890
DI 10.1002/(SICI)1099-0518(199808)36:11<1885::AID-POLA23>3.0.CO;2-9
PG 6
WC Polymer Science
SC Polymer Science
GA ZY284
UT WOS:000074604700023
ER
PT J
AU Houser, EJ
Keller, TM
AF Houser, EJ
Keller, TM
TI Hydrosilation routes to materials with high thermal and oxidative
stabilities
SO JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
LA English
DT Article
DE hydrosilation; polymer; siloxane
ID DIACETYLENE COPOLYMERS; HYDROSILYLATION; POLYMERIZATION; POLYMERS
C1 USN, Res Lab, Mat Chem Branch, Div Chem, Washington, DC 20375 USA.
RP Houser, EJ (reprint author), USN, Res Lab, Mat Chem Branch, Div Chem, CODE 6120,4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 21
TC 12
Z9 13
U1 1
U2 4
PU JOHN WILEY & SONS INC
PI NEW YORK
PA 605 THIRD AVE, NEW YORK, NY 10158-0012 USA
SN 0887-624X
J9 J POLYM SCI POL CHEM
JI J. Polym. Sci. Pol. Chem.
PD AUG
PY 1998
VL 36
IS 11
BP 1969
EP 1972
DI 10.1002/(SICI)1099-0518(199808)36:11<1969::AID-POLA34>3.0.CO;2-A
PG 4
WC Polymer Science
SC Polymer Science
GA ZY284
UT WOS:000074604700034
ER
PT J
AU Ngai, KL
Schonhals, A
AF Ngai, KL
Schonhals, A
TI Interpretation of the observed influence of mesophase structures on the
beta-relaxation in side chain liquid crystal polymers
SO JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
LA English
DT Article
DE side chain liquid crystal polymers; beta-relaxation; rotation of
mesogenic units; compensation law
ID GLASS TRANSFORMATION TEMPERATURE; MOLECULAR-DYNAMICS SIMULATION; ELASTIC
NEUTRON-SCATTERING; DISSOLVED POLYCARBONATES; DIELECTRIC-SPECTROSCOPY;
CONDUCTIVITY SPECTRA; ALPHA-RELAXATION; SPIN RELAXATION; FORMING
SYSTEMS; DEUTERON NMR
AB A strong dependence of the rotational dynamics of the mesogenic units (beta- relaxation) on the order of the mesophase was found in sidechain liquid crystal polymers. The preexponential frequency factor, f (beta infinity)*, and the activation energy, E-alpha beta*, Of the p-relaxation rate both increase significantly (i.e., obeying a compensation law) with increasing order of the mesophase which is accompanied by a decrease of the mean lateral mesogenic distance. In this work, we show how these experimental results can be interpreted in a quantitative manner by using the general results of the coupling model for cooperative motions. (C) 1998 John Wiley & Sons.
C1 USN, Res Lab, Dept Navy, Washington, DC 20375 USA.
Bundesanstalt Mat Forsch & Pruefung, D-12205 Berlin, Germany.
RP Ngai, KL (reprint author), USN, Res Lab, Dept Navy, Code 6807,4555 Overlook Ave SW, Washington, DC 20375 USA.
RI Schoenhals, Andreas/E-4194-2010
NR 53
TC 13
Z9 13
U1 0
U2 2
PU JOHN WILEY & SONS INC
PI NEW YORK
PA 605 THIRD AVE, NEW YORK, NY 10158-0012 USA
SN 0887-6266
J9 J POLYM SCI POL PHYS
JI J. Polym. Sci. Pt. B-Polym. Phys.
PD AUG
PY 1998
VL 36
IS 11
BP 1927
EP 1934
DI 10.1002/(SICI)1099-0488(199808)36:11<1927::AID-POLB14>3.3.CO;2-A
PG 8
WC Polymer Science
SC Polymer Science
GA ZY283
UT WOS:000074604600014
ER
PT J
AU Lind, CA
Boris, JP
Oran, ES
Mitchell, WJ
Wilcox, JL
AF Lind, CA
Boris, JP
Oran, ES
Mitchell, WJ
Wilcox, JL
TI The response of a partially confined detonation facility to blast
loading
SO JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME
LA English
DT Article; Proceedings Paper
CT Pressure Vessels and Piping Conference of the
American-Society-of-Mechanical-Engineers
CY JUL 27-31, 1997
CL ORLANDO, FL
SP Amer Soc Mech Engineers
AB It is estimated that more than 500,000 tons of obsolete and unwanted conventional weapons exist in the United Stares. The disposal of these unexploded ordnances, in an environmentally sound and cost-effective way, is of paramount importance. Open-air burning and open-air detonation (OB/OD) are two of the most widely used methods to dispose of these unwanted energetic materials. This paper describes our efforts to improve OB/OD operations through the design and testing of a new, large-scale, partially confined facility that minimizes the adverse affects of far-field noise and maximizes the afterburn of explosive by-products. Several designs were evaluated by a series of axisymmetric, time-dependent numerical simulations using FAST3D, a flux-corrected transport-based code optimized for parallel processing. The simulations are used to test various facility geometries and placements and sizes of charges to determine combinations that result in acceptable environmental impact. Comparisons of the pressure and structural analyses far 50 and 100 lb of spherically shaped RDX charges show that the 50-lb spherically shaped charge placed at a height of approximately 2.0 m resulted in an efficient detonation and maintained the structural integrity of the detonation facility.
C1 USN, Computat Phys & Fluid Dynam Lab, Washington, DC 20372 USA.
US EPA, Off Res & Dev, Res Triangle Pk, NC 27711 USA.
USA, W Desert Test Ctr, Dugway, UT 84022 USA.
RP USN, Computat Phys & Fluid Dynam Lab, Code 6440,B-97,4555 Overlook Ave SW, Washington, DC 20372 USA.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0094-9930
EI 1528-8978
J9 J PRESS VESS-T ASME
JI J. Press. Vessel Technol.-Trans. ASME
PD AUG
PY 1998
VL 120
IS 3
BP 306
EP 312
DI 10.1115/1.2842062
PG 7
WC Engineering, Mechanical
SC Engineering
GA 112TX
UT WOS:000075511200015
ER
PT J
AU Lind, CA
Boris, JP
Oran, ES
Mitchell, WJ
Wilcox, JL
AF Lind, CA
Boris, JP
Oran, ES
Mitchell, WJ
Wilcox, JL
TI The effect of charge shape on partially confined detonations
SO JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME
LA English
DT Article; Proceedings Paper
CT Pressure Vessels and Piping Conference of the
American-Society-of-Mechanical-Engineers
CY JUL 27-31, 1997
CL ORLANDO, FL
SP Amer Soc Mech Engineers
AB More than 500,000 tons of obsolete and unwanted conventional weapons exist in the United States. The disposal of these unexploded ordnances, in an environmentally sound and cost-effective way, is of paramount importance. Different types of incinerators and detonation chambers have been proposed to eliminate these unwanted energetic materials. However, questions about the design of such facilities and the environmental consequences of their use must be answered. This paper describes numerical simulations of a large-scale partially confined detonation facility. Detonation facility designs were evaluated by a sei-ies of axisymmetric, time-dependent simulations using FAST3D, a numerical model based on flux-connected transport coupled to the virtual cell embedding algorithm for simulating complex geometries. The simulations assisted in determining the shape and size of the detonation charge mass that maintained the structural integrity of the facility. Comparisons of the pressure and structural analyses for spherically and cylindrically shaped RDX charges in a fired volume show that the 50-lb spherically shaped charge resulted in an efficient detonation and maintained the structural integrity of the detonation facility.
C1 USN, Computat Phys & Fluid Dynam Lab, Washington, DC 20372 USA.
US EPA, Off Res & Dev, Res Triangle Pk, NC 27711 USA.
USA, W Desert Test Ctr, Dugway, UT 84022 USA.
RP USN, Computat Phys & Fluid Dynam Lab, Code 6440,B-97,4555 Overlook Ave SW, Washington, DC 20372 USA.
NR 10
TC 0
Z9 0
U1 1
U2 1
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0094-9930
EI 1528-8978
J9 J PRESS VESS-T ASME
JI J. Press. Vessel Technol.-Trans. ASME
PD AUG
PY 1998
VL 120
IS 3
BP 313
EP 318
DI 10.1115/1.2842063
PG 6
WC Engineering, Mechanical
SC Engineering
GA 112TX
UT WOS:000075511200016
ER
PT J
AU Luqi
Chang, CK
Zhu, H
AF Luqi
Chang, CK
Zhu, H
TI Specifications in software prototyping
SO JOURNAL OF SYSTEMS AND SOFTWARE
LA English
DT Article
ID LANGUAGE
AB We explore the use of software specifications for software prototyping. This paper describes a process model for software prototyping, and shows how specifications can be used to support such a process via a cellular mobile phone switch example. (C) 1998 Elsevier Science Inc. All rights reserved.
C1 Univ Illinois, Dept EECS MC154, Chicago, IL 60607 USA.
USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
Nanjing Univ, Inst Comp Software, Nanjing 210093, Peoples R China.
RP Univ Illinois, Dept EECS MC154, Chicago, IL 60607 USA.
EM ckchang@eecs.uic.edu
RI Zhu, Hong/B-3231-2011
OI Zhu, Hong/0000-0001-9393-5005
NR 24
TC 1
Z9 1
U1 0
U2 1
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0164-1212
EI 1873-1228
J9 J SYST SOFTWARE
JI J. Syst. Softw.
PD AUG
PY 1998
VL 42
IS 2
BP 125
EP 140
PG 16
WC Computer Science, Software Engineering; Computer Science, Theory &
Methods
SC Computer Science
GA 109AY
UT WOS:000075300100004
ER
PT J
AU Berzins, V
AF Berzins, V
TI Recombining changes to software specifications
SO JOURNAL OF SYSTEMS AND SOFTWARE
LA English
DT Article
DE software evolution; change merging; specifications; logic
ID PROGRAMS
AB This paper proposes a model of software changes for supporting the evolution of software prototypes. We decompose software evolution steps into primitive substeps that correspond to monotonic specification changes. This structure is used to rearrange chronological derivation sequences into idealized conceptual derivation structures containing only meaning-extending changes, and to automatically combine different changes to a specification. A set of examples illustrates the ideas. (C) 1998 Elsevier Science Inc. All rights reserved.
C1 USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
RP Berzins, V (reprint author), USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
NR 28
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 USA
SN 0164-1212
J9 J SYST SOFTWARE
JI J. Syst. Softw.
PD AUG
PY 1998
VL 42
IS 2
BP 165
EP 174
DI 10.1016/S0164-1212(98)10007-9
PG 10
WC Computer Science, Software Engineering; Computer Science, Theory &
Methods
SC Computer Science
GA 109AY
UT WOS:000075300100007
ER
PT J
AU Lim, R
AF Lim, R
TI Acoustic scattering by a partially buried three-dimensional elastic
obstacle
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID 2 HALF-SPACES; WAVE SCATTERING; MULTIPLE-SCATTERING; T-MATRIX; FLUID;
PROPAGATION; REFLECTION; MEDIA
AB A transition-matrix solution for the spectral scattering response of an elastic obstacle that penetrates a plane-stratified fluid host is formulated. The field scattered from the segment in each layer is expanded in a global outgoing basis centered on that segment and these segment fields are superposed at the field point. A manageable structure for the transition matrix is maintained by using the boundary conditions to couple these segment fields to the interior held of the obstacle via exterior surface field expansions centered on the primary origin of the obstacle. Two formulations are presented and compared in which the surface fields are expanded in either the standard set of regular spherical eigenfunctions of the Helmholtz equation or the spherical harmonics. Numerical tests for an axisymmetric spheroid indicate both formulations are viable but exhibit different convergence and stability characteristics. However, in both cases, convergence is better for flattened shapes (oblate) than elongated shapes (prolate). Examples are presented to illustrate environmental effects on the backscatter by a bubble and elastic spheres and spheroids that penetrate a water/ sediment interface. [S0001-4966(98)02207-3]
C1 USN, Ctr Surface Warfare, Coastal Syst Stn, Dahlgren Div, Panama City, FL 32407 USA.
RP Lim, R (reprint author), USN, Ctr Surface Warfare, Coastal Syst Stn, Dahlgren Div, Code R22,6703 W Highway 98, Panama City, FL 32407 USA.
NR 33
TC 21
Z9 21
U1 0
U2 2
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0001-4966
J9 J ACOUST SOC AM
JI J. Acoust. Soc. Am.
PD AUG
PY 1998
VL 104
IS 2
BP 769
EP 782
DI 10.1121/1.423352
PN 1
PG 14
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 108FF
UT WOS:000075254800020
ER
PT J
AU Lingevitch, JF
Collins, MD
AF Lingevitch, JF
Collins, MD
TI Wave propagation in range-dependent poro-acoustic waveguides
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID CONSERVING PARABOLIC EQUATION; ELASTIC MEDIA; OCEAN; REFLECTION;
INTERFACE; DEPTH
AB The parabolic equation method is extended to handle range-dependent pore-acoustic waveguides. A pore-acoustic medium is the limiting case of a pore-elastic medium in which the shear wave speed vanishes. Recent experiments indicate that this is a relevant limit [Chotiros, "Biot model of sound propagation in water-saturated sand," J. Acoust. Soc. Am. 97, 199-214 (1995)]. Energy-conserving and single-scattering techniques are developed for handling vertical interfaces. The single-scattering solution is extended to problems involving fluid layers above pore-acoustic sediments. Improved rational function approximations are developed by rotating the branch cut [Milinazzo et al, "Rational square-root approximations for parabolic equation algorithms," J. Acoust. Sec. Am. 101, 760-766 (1997)]. [S0001-4966(98)05507-6]
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Lingevitch, JF (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 22
TC 20
Z9 20
U1 0
U2 2
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0001-4966
J9 J ACOUST SOC AM
JI J. Acoust. Soc. Am.
PD AUG
PY 1998
VL 104
IS 2
BP 783
EP 790
DI 10.1121/1.423239
PN 1
PG 8
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 108FF
UT WOS:000075254800021
ER
PT J
AU Cuschieri, JM
Feit, D
AF Cuschieri, JM
Feit, D
TI Full numerical solution for the far-field and near-field scattering from
a fluid-loaded elastic plate with distributed mass or stiffness
inhomogeneity
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
AB The scattering of a plane acoustic wave by a fluid-loaded thin elastic plate of infinite extent with a distributed mass or stiffness inhomogeneity is investigated. This paper is a follow up to previous work done by the same authors on the scattering from a fluid-loaded plate with a distributed mass inhomogeneity. In this paper both stiffness and mass distributed inhomogeneities are considered and a complete description of the full numerical solution is presented. Furthermore, both near-field and far-field scattering results are presented in this paper. The presence of the, distributed inhomogeneity modifies the wave number transform of the equation of motion of the fluid-loaded plate to a Fredholm integral equation. This integral equation has singularities at the roots of the dispersion equation. To obtain a complete numerical solution of the Fredholm integral equation, a singularity subtraction technique is used, which is similar in essence to the hybrid analytic/numerical approach for the solution of the scattering from a fluid-loaded elastic plate [J. Acoust. Sec. Am. 95, 1998-2005 (1994)]. The solution to the resulting Fredholm integral equation of the second kind is obtained using the Nystrom approximation. The results for the far-field scattering are for an oblique angle of incidence and for monostatic scattering. The results show that mass distributed inhomogeneities are stronger scatterers than distributed stiffness inhomogeneities for frequencies below the critical frequency of the plate. Above the critical frequency, both types of inhomogeneities have similar scattering strengths. Also included are results for different types of inhomogeneity distributions. This work was sponsored by ONR. (C) 1998 Acoustical Society of America. [S0001-4966(98)01708-1].
C1 Florida Atlantic Univ, Dept Ocean Engn, Ctr Acoust & Vibrat, Boca Raton, FL 33431 USA.
David Taylor Res Ctr, NSWC, Carderock Div, Bethesda, MD 20817 USA.
RP Cuschieri, JM (reprint author), Florida Atlantic Univ, Dept Ocean Engn, Ctr Acoust & Vibrat, Boca Raton, FL 33431 USA.
NR 7
TC 8
Z9 8
U1 0
U2 0
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
USA
SN 0001-4966
J9 J ACOUST SOC AM
JI J. Acoust. Soc. Am.
PD AUG
PY 1998
VL 104
IS 2
BP 915
EP 925
DI 10.1121/1.423337
PN 1
PG 11
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 108FF
UT WOS:000075254800036
ER
PT J
AU Lee, HS
Yang, XQ
Xiang, CL
McBreen, J
Choi, LS
AF Lee, HS
Yang, XQ
Xiang, CL
McBreen, J
Choi, LS
TI The synthesis of a new family of boron-based anion receptors and the
study of their effect on ion pair dissociation and conductivity of
lithium salts in nonaqueous solutions
SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY
LA English
DT Article
ID COMPLEXES
AB A new family of anion receptors based on boron compounds has been synthesized. These compounds can be used as anion receptors in lithium battery electrolytes. This family includes various borane and berate compounds with different fluorinated aryl and fluorinated alkyl groups. When these anion receptors are used as additives in 1,2-dimethoxyethane (DME) solutions containing various lithium salts, the ionic conductivities of these solutions are greatly increased. The electrolytes tested in this study were DME solutions containing the following lithium salts: LiF, LiCl, LiBr, LiI, CF3COOLi, and C2F5COOLi. Without the additive, the solubility of LiF in DME land all other nonaqueous solvents) is very low With some of these boron compounds as additives, LiF solutions in DME with concentration as high as 1 M were obtained. The solubilities of the other salts were also increased by these additives. Near edge X-ray absorption fine structure (NEXAFS) spectroscopy studies show that Cl- and I- anions are complexed with these compounds in DME solutions containing LiCl or LiI salts. The degree of complexation is also closely related to the structures of the fluorinated aryl and alkyl groups, which act as electron-withdrawing groups. The NEXAFS results are in good agreement with ionic conductivity studies.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
USN, Res Lab, Washington, DC 20375 USA.
RP Lee, HS (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 8
TC 108
Z9 115
U1 3
U2 35
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
SN 0013-4651
J9 J ELECTROCHEM SOC
JI J. Electrochem. Soc.
PD AUG
PY 1998
VL 145
IS 8
BP 2813
EP 2818
DI 10.1149/1.1838719
PG 6
WC Electrochemistry; Materials Science, Coatings & Films
SC Electrochemistry; Materials Science
GA 104BE
UT WOS:000074991700031
ER
PT J
AU Driscoll, TJ
Kallen, AJ
AF Driscoll, TJ
Kallen, AJ
TI Reading the E-test - Response
SO LABORATORY MEDICINE
LA English
DT Letter
C1 USN, Med Ctr, Div Infect Dis, San Diego, CA 92152 USA.
RP Driscoll, TJ (reprint author), USN, Med Ctr, Div Infect Dis, San Diego, CA 92152 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC CLIN PATHOLOGISTS
PI CHICAGO
PA 2100 W HARRISON ST, CHICAGO, IL 60612 USA
SN 0007-5027
J9 LAB MED
JI Lab. Med.
PD AUG
PY 1998
VL 29
IS 8
BP 457
EP 457
PG 1
WC Medical Laboratory Technology
SC Medical Laboratory Technology
GA 106BJ
UT WOS:000075109600003
ER
PT J
AU Spanos, G
Hyland, RW
AF Spanos, G
Hyland, RW
TI Symposium on kinetically determined particle shapes and the dynamics of
solid : solid interfaces - Foreword
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Editorial Material
C1 USN, Res Lab, Washington, DC 20375 USA.
ALCOA, Pittsburgh, PA 15219 USA.
RP Spanos, G (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD AUG
PY 1998
VL 29
IS 8
BP 2019
EP 2019
PG 1
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 111EP
UT WOS:000075424600001
ER
PT J
AU Fonda, RW
Mangan, MA
Shiflet, GJ
AF Fonda, RW
Mangan, MA
Shiflet, GJ
TI The effect of undercooling on the cellular precipitation reaction in
Cu-3 Pct Ti
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Kinetically Determined Particle Shapes and the Dynamics of
Solid - Solid Interfaces
CY OCT, 1996
CL CINCINNATI, OHIO
SP TMS, ASM
ID ALLOYS
AB The effect of undercooling on the morphology of the cellular precipitation reaction in Cu-3 Pet Ti is examined by scanning electron microscopy (SEM, transmission electron microscopy (TEM), and serial sectioning experiments. The reaction front formed at small undercooling, which exhibits strong faceting of the precipitate growth interfaces, gradually changes with increasing undercooling to a smoothly curved reaction front with concave precipitate growth interfaces and convex grain boundary segments. This concealment of the faceted reaction front appears to be due to the rapid accumulation of growth ledges with increasing undercooling. This study also indicates that the cellular precipitation reaction, at small undercooling, is initiated by Widmanstatten precipitation. At larger undercoolings, a second mechanism is responsible for cellular genesis. Finally, contrary to accepted models of colony development, serial sectioning experiments show that nucleation of additional lamellae may occur at the faces of existing lamellae, from where they extend laterally to achieve the characteristic interlamellar spacing for that temperature.
C1 Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22903 USA.
RP Fonda, RW (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 23
TC 3
Z9 3
U1 1
U2 5
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD AUG
PY 1998
VL 29
IS 8
BP 2101
EP 2110
DI 10.1007/s11661-998-0035-z
PG 10
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 111EP
UT WOS:000075424600009
ER
PT J
AU Dansak, DA
AF Dansak, DA
TI Childhood abuse and parental disorders reported by Navy outpatient
mental health patients
SO MILITARY MEDICINE
LA English
DT Article
ID SEXUAL ABUSE; PHYSICAL ABUSE; PSYCHIATRIC OUTPATIENTS; ADULT LIFE;
HISTORIES; IMPACT; CONSEQUENCES; INPATIENTS; COMMUNITY; STRESS
AB Objective: To ascertain the number of Navy outpatient mental health patients reporting a history of childhood abuse. To explore the relationships among abuse history, parental/step-parental substance abuse, mental illness, and divorce. Method: Review of 134 clinical data forms completed by patients when first seen. Results: Twenty-six percent reported at least one type of childhood abuse (physical, sexual, verbal, emotional). Proportionally more females reported any one type of abuse. Assailants were predominantly males, typically fathers or stepfathers. Verbal abuse significantly affected childhood happiness. Parental substance abuse, mental illness, or divorce before age 19 reduced childhood happiness, and abuse further reduced it. Conclusion: Childhood abuse is commonly reported by Navy mental health patients and may affect their adjustment to military life.
C1 USN Hosp, Dept Mental Hlth, Pensacola, FL 32512 USA.
RP Dansak, DA (reprint author), USN Hosp, Dept Mental Hlth, 6000 W Highway 98, Pensacola, FL 32512 USA.
NR 21
TC 5
Z9 6
U1 2
U2 2
PU ASSN MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
J9 MIL MED
JI Milit. Med.
PD AUG
PY 1998
VL 163
IS 8
BP 510
EP 514
PG 5
WC Medicine, General & Internal
SC General & Internal Medicine
GA 110MT
UT WOS:000075385500003
PM 9715612
ER
PT J
AU Hudson, SJ
Todd, JS
AF Hudson, SJ
Todd, JS
TI Rapid decompression in the EA-6B
SO MILITARY MEDICINE
LA English
DT Article
AB A Grumman EA-6B aircraft experienced a rapid pressurization failure at 27,000 feet. All four crew members had removed their oxygen masks and were breathing cabin air pressurized to 8,000 feet before the incident. Although none of the crew members developed signs or symptoms of decompression sickness, the potential for adversity was realized by all. Altitude decompression sickness (DCS) and pulmonary overinflation syndrome (POIS) represent potentially fatal complications of rapid decompression or uncontrolled ascent in aircraft. The signs and symptoms of DCS range from mild joint pain to eventual cardiopulmonary collapse and death. The symptoms of POIS are usually more abrupt and lethal. The medical management of DCS and POIS includes (1) maintenance of airway and cardiopulmonary resuscitation if necessary; (2) administration of 100% oxygen; (3) descent as per Naval Aviation Training and Operating Procedures Standardization guidelines; (4) horizontal body position; (5) maintenance of fluid intake; and (6) early medical evaluation by a flight surgeon or other physician qualified in the management of DCS. Symptoms of DCS may appear up to 24 hours after decompression, and continued monitoring or grounding of exposed individuals during this time is essential. Many controllable factors may predispose to DCS/POIS, and preventive measures should be taken to ensure maximum reduction of risk.
C1 USN Hosp, Dept Aviat Med, Oak Harbor, WA 98278 USA.
RP Hudson, SJ (reprint author), USN Hosp, Dept Aviat Med, Oak Harbor, WA 98278 USA.
NR 4
TC 0
Z9 0
U1 0
U2 1
PU ASSN MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
J9 MIL MED
JI Milit. Med.
PD AUG
PY 1998
VL 163
IS 8
BP 572
EP 574
PG 3
WC Medicine, General & Internal
SC General & Internal Medicine
GA 110MT
UT WOS:000075385500015
PM 9715624
ER
PT J
AU Hill, JM
AF Hill, JM
TI Pride and prodigies: Studies in the monsters of the 'Beowulf'
manuscripts
SO MODERN PHILOLOGY
LA English
DT Book Review
C1 USN Acad, Annapolis, MD 21402 USA.
RP Hill, JM (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 5801 S ELLIS AVENUE, CHICAGO, IL 60637 USA
SN 0026-8232
J9 MOD PHILOLOGY
JI Mod. Philol.
PD AUG
PY 1998
VL 96
IS 1
BP 58
EP 61
DI 10.1086/492717
PG 4
WC Language & Linguistics; Literature
SC Linguistics; Literature
GA 116MV
UT WOS:000075729900006
ER
PT J
AU Hill, JM
AF Hill, JM
TI Interactions of thought and language in Old English poetry
SO MODERN PHILOLOGY
LA English
DT Book Review
C1 USN Acad, Annapolis, MD 21402 USA.
RP Hill, JM (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 5801 S ELLIS AVENUE, CHICAGO, IL 60637 USA
SN 0026-8232
J9 MOD PHILOLOGY
JI Mod. Philol.
PD AUG
PY 1998
VL 96
IS 1
BP 61
EP 65
DI 10.1086/492718
PG 5
WC Language & Linguistics; Literature
SC Linguistics; Literature
GA 116MV
UT WOS:000075729900007
ER
PT J
AU Rosen, M
Efros, A
AF Rosen, M
Efros, A
TI Effective mass approximation revisited
SO MRS BULLETIN
LA English
DT Letter
ID CDSE QUANTUM DOTS; ASSIGNMENT; SPECTRUM
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Rosen, M (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 10
TC 4
Z9 4
U1 1
U2 1
PU MATERIALS RESEARCH SOCIETY
PI WARRENDALE
PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA
SN 0883-7694
J9 MRS BULL
JI MRS Bull.
PD AUG
PY 1998
VL 23
IS 8
BP 6
EP 6
PG 1
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 111EK
UT WOS:000075424200002
ER
PT J
AU Spatz, M
Kawai, N
Bembry, J
Lenz, F
McCarron, RM
AF Spatz, M
Kawai, N
Bembry, J
Lenz, F
McCarron, RM
TI Human brain capillary endothelium: Modulation of K+ efflux and K+, Ca2+
uptake by endothelin
SO NEUROCHEMICAL RESEARCH
LA English
DT Article
DE human brain capillary endothelium; endothelin-1; K+ efflux; K+ uptake;
Ca2+ uptake
ID IMMUNOREACTIVE ENDOTHELIN-1; SIGNAL-TRANSDUCTION; ET(A) RECEPTORS;
CELLS; BIOCHEMISTRY; ISCHEMIA; BARRIER; SODIUM
AB This report describes K+ efflux, K+ and Ca2+ uptake responses to endothelins (ET-1 and ET-3) in cultured endothelium derived from capillaries of human brain (HBEC). ET-1 dose dependently increased K+ efflux, K+ and Ca2+ uptake in these cells. ET-1 stimulated K+ efflux occurred prior to that of K+ uptake. ET-3 was ineffective. The main contributor to the ET-1 induced K+ uptake was ouabain but not bumetanide-sensitive (Na+-K+-ATPase and Na+-K+-Cl- cotransport activity, respectively). All tested paradigms of ET-1 effects in HBEC were inhibited by selective antagonist of ETA but not ETB receptors and inhibitors of phospholipase C and receptor-operated Ca2+ channels. Activation of protein kinase C (PKC) decreased whereas inhibition of PKC increased the ET-1 stimulated K+ efflux, K+ and Ca2+ uptake in HBEC. The results indicate that ET-1 affects the HBEC ionic transport systems through activation of ETA receptors linked to PLC and modulated by intracellular Ca2+ mobilization and PKC.
C1 NINDS, Stroke Branch, NIH, Bethesda, MD 20892 USA.
Johns Hopkins Univ Hosp, Baltimore, MD 21205 USA.
USN, Resuscitat Med Program, Med Res Inst, Bethesda, MD 20889 USA.
RP Spatz, M (reprint author), NINDS, Stroke Branch, NIH, 36 Convent Dr,MSC 4128, Bethesda, MD 20892 USA.
NR 25
TC 4
Z9 4
U1 0
U2 0
PU PLENUM PUBL CORP
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0364-3190
J9 NEUROCHEM RES
JI Neurochem. Res.
PD AUG
PY 1998
VL 23
IS 8
BP 1125
EP 1132
DI 10.1023/A:1020772422266
PG 8
WC Biochemistry & Molecular Biology; Neurosciences
SC Biochemistry & Molecular Biology; Neurosciences & Neurology
GA 105TE
UT WOS:000075089000014
PM 9704603
ER
PT J
AU Navar, LG
Zou, LX
Von Thun, A
Wang, CT
Imig, JD
Mitchell, KD
AF Navar, LG
Zou, LX
Von Thun, A
Wang, CT
Imig, JD
Mitchell, KD
TI Unraveling the mystery of Goldblatt hypertension
SO NEWS IN PHYSIOLOGICAL SCIENCES
LA English
DT Article
ID II-INFUSED RATS; ANGIOTENSIN-II; BLOOD-PRESSURE; 2-KIDNEY
AB In hypertension caused by unilateral renal artery stenosis, the nonstenotic kidney becomes renin depleted but fails to prevent hypertension. The nonstenotic kidney mysteriously develops elevated infrarenal angiotensin II (ANG II) content. Rats chronically infused with ANG II exhibit a similar hypertensive process. The augmentation of intrarenal ANG II is due to receptor-mediated internalization and continued ANG II formation, which provide a hypertensinogenic stimulus.
C1 Tulane Univ, Sch Med, Dept Physiol, New Orleans, LA 70112 USA.
USN, Med Ctr, Dept Internal Med, San Diego, CA USA.
Gen Hosp, Dept Internal Med, Nephrol Sect, Taipei, Taiwan.
RP Navar, LG (reprint author), Tulane Univ, Sch Med, Dept Physiol, New Orleans, LA 70112 USA.
OI Imig, John/0000-0002-9668-2899
NR 15
TC 75
Z9 79
U1 0
U2 0
PU NEWS IN PHYSIOLOGICAL SCIENCES
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA
SN 0886-1714
J9 NEWS PHYSIOL SCI
JI News Physiol. Sci.
PD AUG
PY 1998
VL 13
BP 170
EP 176
PG 7
WC Physiology
SC Physiology
GA 113AC
UT WOS:000075526300003
ER
PT J
AU Kang, JU
Frankel, MY
Esman, RD
AF Kang, JU
Frankel, MY
Esman, RD
TI Demonstration of microwave frequency shifting by use of a highly chirped
mode-locked fiber laser
SO OPTICS LETTERS
LA English
DT Article
AB We report an experimental demonstration of a photonic microwave shifter using a highly chirped mode-locked fiber laser. The system is based on dispersive compression or expansion of highly chirped optical pulses that are amplitude modulated by the microwave signal. Using this technique, we demonstrated frequency shifting of a microwave signal from 10 GHz down to 5 GHz and up to 25 GHz. (C) 1998 Optical Society of America.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Kang, JU (reprint author), USN, Res Lab, Code 5670,4555 Overlook Ave SW, Washington, DC 20375 USA.
RI Kang, Jin/A-3228-2010
NR 6
TC 21
Z9 21
U1 0
U2 0
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD AUG 1
PY 1998
VL 23
IS 15
BP 1188
EP 1190
DI 10.1364/OL.23.001188
PG 3
WC Optics
SC Optics
GA 104QC
UT WOS:000075024400014
PM 18087469
ER
PT J
AU Wheeler, DS
Shope, TR
AF Wheeler, DS
Shope, TR
TI Questions about toy car head injury - In reply
SO PEDIATRICS
LA English
DT Letter
C1 USN Hosp, FPO, AP 96538 USA.
Johns Hopkins Childrens Ctr, Div Gen Pediat, Baltimore, MD 21287 USA.
RP Wheeler, DS (reprint author), USN Hosp, PSC 490 Box 221, FPO, AP 96538 USA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU AMER ACAD PEDIATRICS
PI ELK GROVE VILLAGE
PA 141 NORTH-WEST POINT BLVD,, ELK GROVE VILLAGE, IL 60007-1098 USA
SN 0031-4005
J9 PEDIATRICS
JI Pediatrics
PD AUG
PY 1998
VL 102
IS 2
BP 438
EP 438
PG 1
WC Pediatrics
SC Pediatrics
GA 106JH
UT WOS:000075125800038
ER
PT J
AU Rhodenizer, L
Bowers, CA
AF Rhodenizer, L
Bowers, CA
TI Team practice schedules: What do we know?
SO PERCEPTUAL AND MOTOR SKILLS
LA English
DT Article
AB Given the prevalence of teams in many work environments, it is important to determine the practice schedules that optimize their learning. Thus, the effect of practice schedule on team learning was investigated. Teams practiced under either a massed or distributed practice schedule and were tested under a short-term or longer-term retention interval. These results support the distribution of practice effect for team learning; however, the results suggest that the known benefits for longer-term retention that distributed practice has on individual learning may not apply to learning by 2-person teams under the present conditions.
C1 Univ Cent Florida, Dept Psychol, Team Performance Lab, Orlando, FL 32816 USA.
USN, Air Warfare Ctr Training Syst Div, Washington, DC USA.
RP Rhodenizer, L (reprint author), Univ Cent Florida, Dept Psychol, Team Performance Lab, 4000 Cent Florida Blvd, Orlando, FL 32816 USA.
NR 5
TC 1
Z9 1
U1 0
U2 0
PU PERCEPTUAL MOTOR SKILLS
PI MISSOULA
PA PO BOX 9229, MISSOULA, MT 59807 USA
SN 0031-5125
J9 PERCEPT MOTOR SKILL
JI Percept. Mot. Skills
PD AUG
PY 1998
VL 87
IS 1
BP 31
EP 34
PG 4
WC Psychology, Experimental
SC Psychology
GA 117ZN
UT WOS:000075812900004
ER
PT J
AU Aglitskiy, Y
Serpa, FG
Meyer, ES
Gillaspy, JD
Brown, CM
Faenov, AY
Pikuz, TA
AF Aglitskiy, Y
Serpa, FG
Meyer, ES
Gillaspy, JD
Brown, CM
Faenov, AY
Pikuz, TA
TI The use of a spherically curved crystal spectrometer for X-ray
measurements on electron beam ion trap
SO PHYSICA SCRIPTA
LA English
DT Article
ID SPECTROSCOPIC INVESTIGATIONS; MICA CRYSTALS; PLASMA; PERFORMANCE;
WAVELENGTHS; REFLECTION; ALPHA; LINE
AB Spherically curved crystal spectrometers are demonstrated for use on an Electron Beam Ion Trap (EBIT) for the first time. Such spectrometers are characterized by high light collection efficiency and relative insensitivity to source position, simultaneously giving them an advantage that no X-ray spectrometer previously used on an EBIT has had. One of the spectrometer crystals tested is composed of mica, giving it the additional advantage that it can be used with reasonable efficiency up to very high order, allowing spectra to span a broad wavelength range from 0.5 Angstroms to 20 Angstroms. Spectra from Ne-like barium and He-like argon are presented.
C1 Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
USN, Res Lab, Washington, DC 20375 USA.
VNIIFTRI, Multicharged Ions Spectra Data Ctr, Mendeleevo 141570, Moscow Region, Russia.
RP Aglitskiy, Y (reprint author), Sci Applicat Int Corp, Mclean, VA 22102 USA.
NR 32
TC 10
Z9 12
U1 0
U2 0
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 AUG
PY 1998
VL 58
IS 2
BP 178
EP 181
DI 10.1088/0031-8949/58/2/012
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 110AG
UT WOS:000075356700012
ER
PT J
AU Peiris, SM
Heinz, DL
AF Peiris, SM
Heinz, DL
TI Compression of seven vacancy-ordered phases of ScxS to 50 GPa
SO PHYSICAL REVIEW B
LA English
DT Article
ID TRANSITION-METAL CHALCOGENIDES; NONSTOICHIOMETRY; PRESSURE; ORIGIN; SCS
AB The ScxS system. (0.8