FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Ricci, RM Deering, KC AF Ricci, RM Deering, KC TI Erythema nodosum caused by omeprazole SO CUTIS LA English DT Article AB We report a case of erythema nodosum caused by omeprazoIe. This side effect of omeprazole has not been previously reported, A 35-year-old white woman developed multiple tender erythematous nodules over the anterior aspect of her upper and lower extremities, fever, malaise, and edema, Her symptoms resolved with withdrawal of all preexisting medications and conservative treatment Her symptoms flared soon after a rechallenge with omeprazole. A thorough history, physical examination,, laboratory evaluation, and roentgenogram failed to reveal another cause for erythema nodosum, It is clear from the rechallenge that this patient's erythema nodosum was caused by omeprazole. We consider that omeprazole should be added to the list of medications known to cause erythema nodosum. RP Ricci, RM (reprint author), WILFORD HALL USAF MED CTR,PSMD,DEPT DERMATOL,2200 BERGQUIST DR,SUITE 1,LACKLAND AFB,TX 78236, USA. NR 3 TC 13 Z9 13 U1 0 U2 0 PU EXCERPTA MEDICA INC PI NEW YORK PA 245 WEST 17TH STREET, NEW YORK, NY 10011 SN 0011-4162 J9 CUTIS JI Cutis PD JUN PY 1996 VL 57 IS 6 BP 434 EP 434 PG 1 WC Dermatology SC Dermatology GA UU584 UT WOS:A1996UU58400018 PM 8804848 ER PT J AU Goettl, BP Yadrick, RM ConnollyGomez, C Regian, W Shebilske, WL AF Goettl, BP Yadrick, RM ConnollyGomez, C Regian, W Shebilske, WL TI Alternating task modules in isochronal distributed training of complex tasks SO HUMAN FACTORS LA English DT Article ID FREQUENCY; SKILLS; MEMORY; RECALL; GAME; WORD AB We compared an alternating task modules (ATM) protocol-which alternated sessions on Space Fortress, Phoenix (video-game-like tasks), and algebra word problems-with a massed protocol, which blocked sessions on the tasks. The protocols were isochronal (equal in duration), each entailing one week of training and testing. ATM gave the men and women an advantage in learning and retention Space Fortress and algebra word problems; it did not change their performance on Phoenix. Arousal, not confidence or motivation, was implicated in the ATM advantage. The practical implication of demonstrating and describing ATM benefits is that real-world training often requires minimal durations. This pragmatic constraint favors ATM over frequently investigated anisochronal schedules, in which spacing practice over long durations is more effective than massing practice in short durations. Evaluations of retention, arousal, motivation, and confidence began the process of testing theories that might be expanded to explain and ATM benefits. C1 ARMSTRONG LAB,BROOKS AFB,TX. GALAXY SCI,LACKLAND AFB,TX. TEXAS A&M UNIV,COLLEGE STN,TX. NR 32 TC 9 Z9 10 U1 0 U2 2 PU HUMAN FACTORS SOC PI SANTA MONICA PA BOX 1369, SANTA MONICA, CA 90406 SN 0018-7208 J9 HUM FACTORS JI Hum. Factors PD JUN PY 1996 VL 38 IS 2 BP 330 EP 346 DI 10.1518/001872096779048048 PG 17 WC Behavioral Sciences; Engineering, Industrial; Ergonomics; Psychology, Applied; Psychology SC Behavioral Sciences; Engineering; Psychology GA UZ128 UT WOS:A1996UZ12800013 ER PT J AU Turner, AD AF Turner, AD TI A paired-comparison method for interval scaling SO HUMAN FACTORS LA English DT Article AB A new method of analyzing paired-comparison data is presented: the linear paired-comparison (LPC) method. The LPC solves some deficiencies in the implementation of the eigenvector and geometric mean ratio hierarchy paired-comparison methods proposed by T. L. Saaty. In addition to formats typically used to co paired-comparison data, an alternative format for collecting data is presented Levels of significance with regard to rater consistency were evaluated for bo geometric mean and LPC methods, and it was found that levels of significance were not an adequate predictor of the proper ordinal ranking of the scale values either method. A constant value for a consistency criterion is more appropriate. Saaty's criterion of an acceptable consistency index (CI) to judge a rater's consistency of CI less than or equal to 0.10 is defended. In addition, an appropriate value for the geometric mean method's rater consistency criterion, the residual mean square (S-2), was found to be S-2 less than or equal to 0.27. For the LPC method, an acceptable criterion for the standard deviation from consistency (sigma(c)) was found to be sigma(c) less than or equal to 2.25. C1 USAF,FLIGHT TEST CTR,EDWARDS AFB,CA. NR 9 TC 2 Z9 2 U1 0 U2 3 PU HUMAN FACTORS SOC PI SANTA MONICA PA BOX 1369, SANTA MONICA, CA 90406 SN 0018-7208 J9 HUM FACTORS JI Hum. Factors PD JUN PY 1996 VL 38 IS 2 BP 362 EP 374 DI 10.1518/001872096779048057 PG 13 WC Behavioral Sciences; Engineering, Industrial; Ergonomics; Psychology, Applied; Psychology SC Behavioral Sciences; Engineering; Psychology GA UZ128 UT WOS:A1996UZ12800015 ER PT J AU McGahan, RV Kleinman, RE AF McGahan, RV Kleinman, RE TI Special session on image reconstruction using real data SO IEEE ANTENNAS AND PROPAGATION MAGAZINE LA English DT Article C1 UNIV DELAWARE,CTR MATH WAVES,NEWARK,DE 19716. UNIV DELAWARE,DEPT MATH SCI,NEWARK,DE 19716. RP McGahan, RV (reprint author), USAF,ROME LAB,31 GRENIER ST,BEDFORD,MA 01731, USA. NR 2 TC 39 Z9 39 U1 1 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1045-9243 J9 IEEE ANTENNAS PROPAG JI IEEE Antennas Propag. Mag. PD JUN PY 1996 VL 38 IS 3 BP 39 EP 40 PG 2 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA UY725 UT WOS:A1996UY72500007 ER PT J AU Morris, JB Pommet, DA McGahan, RV Fiddy, MA AF Morris, JB Pommet, DA McGahan, RV Fiddy, MA TI Imaging of unknown targets from measured scattering data SO IEEE ANTENNAS AND PROPAGATION MAGAZINE LA English DT Article C1 UNIV MASSACHUSETTS,DEPT ELECT ENGN,LOWELL,MA 01854. RP Morris, JB (reprint author), USAF,ROME LAB,31 GRENIER ST,BEDFORD,MA 01731, USA. NR 5 TC 3 Z9 3 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1045-9243 J9 IEEE ANTENNAS PROPAG JI IEEE Antennas Propag. Mag. PD JUN PY 1996 VL 38 IS 3 BP 53 EP 56 DI 10.1109/MAP.1996.511956 PG 4 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA UY725 UT WOS:A1996UY72500012 ER PT J AU Altshuler, EE AF Altshuler, EE TI A monopole loaded with a loop antenna SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION LA English DT Article AB A traveling-wave distribution of current can be produced on a monopole over a ground plane by inserting a resistance of suitable magnitude one-quarter wavelength from its end. It has been shown that the resistor can be replaced with a modified folded dipole which has a radiation resistance approximately equal to that of the resistor. In this paper, the resistor is replaced with a loop antenna. The main objective is to obtain an antenna having hemispherical coverage and is circularly polarized. Input impedance, current distribution, and radiation patterns of this antenna are computed using the numerical electromagnetics code (NEC); radiation patterns are also measured. Monopoles which are loaded with both series- and parallel-fed circular and square loops are investigated. It was shown that circular polarization could be obtained over most of the hemisphere with both types of series-fed loops. The parallel-fed loop insertions produced more directional circularly polarized patterns. Most computations and measurements were made at a frequency of 1.6 GHz. The frequency dependence was examined and it was found that these antennas can operate over the band from 1.4-2.0 GHz. These very simple, low-cost antennas have potential application for systems such as IRIDIUM and Global Positioning System. RP Altshuler, EE (reprint author), USAF,ROME LAB,ELECTROMAGNET & RELIABIL DIRECTORATE,BEDFORD,MA 01731, USA. NR 6 TC 5 Z9 5 U1 2 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-926X J9 IEEE T ANTENN PROPAG JI IEEE Trans. Antennas Propag. PD JUN PY 1996 VL 44 IS 6 BP 787 EP 791 DI 10.1109/8.509881 PN 1 PG 5 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA UP865 UT WOS:A1996UP86500004 ER PT J AU Collins, PJ Skinner, JP AF Collins, PJ Skinner, JP TI An iterative solution for TM scattering from perturbed circular dielectric cylinders SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION LA English DT Article AB The electromagnetic scattering from an infinite-length dielectric cylinder with a nearly homogeneous and circular cross section is considered, with the electric field of the incident plane wave aligned parallel to the infinite axis (TM(z)). An iterative approach is adopted, similar to Born's method, but making use of the Green's function for a perfect circular cylinder. As long as the deviations from a homogeneous circular cylinder are minor, the approach is computationally efficient and accurate, a claim demonstrated by comparisons with a moment-method solution. The issue of convergence is explored with respect to shapes and permittivities of perturbations. A method for a priori determination of the success of the iterative method for arbitrary geometries is also given. RP Collins, PJ (reprint author), USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433, USA. NR 8 TC 2 Z9 2 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-926X J9 IEEE T ANTENN PROPAG JI IEEE Trans. Antennas Propag. PD JUN PY 1996 VL 44 IS 6 BP 806 EP 813 DI 10.1109/8.509884 PN 1 PG 8 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA UP865 UT WOS:A1996UP86500007 ER PT J AU Lee, KY Lund, B Ytterdal, T Robertson, P Martinez, EJ Robertson, J Shur, MS AF Lee, KY Lund, B Ytterdal, T Robertson, P Martinez, EJ Robertson, J Shur, MS TI Enhanced CAD model for gate leakage current in heterostructure field effect transistors SO IEEE TRANSACTIONS ON ELECTRON DEVICES LA English DT Article AB A simple and accurate circuit model for Heterostructure Field Effect Transistors (HFET's) is proposed to simulate both the gate and the drain current characteristics accounting for hot-electron effects on gate current and the effect of the gate current on the channel current, An analytical equation that describes the effective electron temperature is developed in a simple form, This equation is suitable for implementation in circuit simulators, The model describes both the drain and gate currents at high gate bias voltages, It has been implemented in our circuit simulator AIM-Spice, and good agreement between simulated and measured results is achieved for enhancement-mode HFET's fabricated in different laboratories, The proposed equivalent circuit and model equations are applicable to other compound semiconductor FET's, i.e., GaAs MESFET's. C1 UNIV VIRGINIA,DEPT ELECT ENGN,CHARLOTTESVILLE,VA 22903. ROGALAND RES,N-4004 STAVANGER,NORWAY. SANDIA NATL LABS,ALBUQUERQUE,NM 87158. USAF,WRIGHT LAB,SOLID STATE TECHNOL DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. RP Lee, KY (reprint author), CHUNGBUK NATL UNIV,DEPT ELECT ENGN,SAN 48 GAESHIN DONG,CHEONGJU 360763,SOUTH KOREA. RI Shur, Michael/A-4374-2016 OI Shur, Michael/0000-0003-0976-6232 NR 16 TC 6 Z9 6 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9383 J9 IEEE T ELECTRON DEV JI IEEE Trans. Electron Devices PD JUN PY 1996 VL 43 IS 6 BP 845 EP 851 PG 7 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA UM679 UT WOS:A1996UM67900001 ER PT J AU Spencer, TA Davis, CE Hendricks, KJ Agee, FJ Gilgenbach, RM AF Spencer, TA Davis, CE Hendricks, KJ Agee, FJ Gilgenbach, RM TI Results from gyrotron backward wave oscillator experiments utilizing a high-current high-voltage annular electron beam SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID CYCLOTRON AUTORESONANCE MASER; LINEAR-THEORY; EFFICIENCY; AMPLIFIER AB We report the first gyrotron-backward-wave-oscillator experiments which utilize a high-current (1-4 kA) high-voltage (300-500 keV) annular electron beam. The experiment was designed to operate in the TE(01) backward wave mode, Radio frequency extracted power was 0.1-4 MW, with pulselengths of 80-500 ns. Experimental results suggest the possibility of competition with the TE(21) backward wave mode. Frequency spectrum measurements have shown a wide content of frequencies during the voltage pulse, an undesirable result for use in narrow-hand devices. C1 UNIV MICHIGAN,DEPT NUCL ENGN,INTENSE ENERGY BEAM INTERACT LAB,ANN ARBOR,MI 48109. RP Spencer, TA (reprint author), USAF,PHILLIPS LAB,HIGH ENERGY SOURCES DIV,WSQN,KIRTLAND AFB,NM 87117, USA. NR 18 TC 20 Z9 20 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0093-3813 J9 IEEE T PLASMA SCI JI IEEE Trans. Plasma Sci. PD JUN PY 1996 VL 24 IS 3 BP 630 EP 635 DI 10.1109/27.532946 PG 6 WC Physics, Fluids & Plasmas SC Physics GA VE084 UT WOS:A1996VE08400011 ER PT J AU Juang, JC Yeh, HH Banda, SS AF Juang, JC Yeh, HH Banda, SS TI Observer-based compensators for fixed-order H-infinity control SO INTERNATIONAL JOURNAL OF CONTROL LA English DT Article ID EQUATIONS AB This paper present a two-Riccati inequality approach for the design of fixed-order H-infinity suboptimal controllers with an observer-based structure. The two Riccati inequalities are only one-way coupled and can be solved consecutively. The fixed-order controller has the structure of a fixed-order estimator of the state feedback control law in the presence of the worst-case disturbances. It retains the observed-based compensates structure of the full-order central controller of the standard H-infinity design but adds a fixed-order dynamic and mappings between the full-order and the fixed-order state spaces. In the full-order special case, this controller recovers to the minimal entropy central controller of the standard H-infinity design. C1 USAF,WRIGHT LAB,FIGC,WRIGHT PATTERSON AFB,OH 45433. RP Juang, JC (reprint author), NATL CHENG KUNG UNIV,DEPT ELECT ENGN,TAINAN 70101,TAIWAN. NR 24 TC 12 Z9 12 U1 0 U2 1 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0020-7179 J9 INT J CONTROL JI Int. J. Control PD JUN PY 1996 VL 64 IS 3 BP 441 EP 461 DI 10.1080/00207179608921638 PG 21 WC Automation & Control Systems SC Automation & Control Systems GA UR257 UT WOS:A1996UR25700007 ER PT J AU Howard, AM AF Howard, AM TI Beyond comfort zones in multiculturalism: Confronting the politics of privilege - Jackson,S, Solis,J SO INTERNATIONAL JOURNAL OF INTERCULTURAL RELATIONS LA English DT Book Review RP Howard, AM (reprint author), USAF,WASHINGTON,DC 20330, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0147-1767 J9 INT J INTERCULT REL JI Int. J. Intercult. Relat. PD SUM-FAL PY 1996 VL 20 IS 3-4 BP 510 EP 515 DI 10.1016/0147-1767(96)83677-7 PG 6 WC Psychology, Social; Social Sciences, Interdisciplinary; Sociology SC Psychology; Social Sciences - Other Topics; Sociology GA VT911 UT WOS:A1996VT91100019 ER PT J AU Koole, R Steenks, MH Witkamp, TD Slootweg, PJ Shaefer, J AF Koole, R Steenks, MH Witkamp, TD Slootweg, PJ Shaefer, J TI Osteochondroma of the mandibular condyle - A case report SO INTERNATIONAL JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY LA English DT Article DE osteochondroma; mandibular condyle AB Osteochondroma of the mandibular condyle is extremely rare and may cause signs and symptoms like those seen in patients with temporomandibular joint dysfunction. Differentiation between osteochondroma and condylar hyperplasia is not possible on histologic grounds alone, but the radiographic and intraoperative findings together are usually sufficient to establish a definite diagnosis. (C) Munksgaard, 1996. C1 UNIV UTRECHT HOSP,DEPT PROSTHODONT & SPECIAL DENT CARE,NL-3508 GA UTRECHT,NETHERLANDS. UNIV UTRECHT HOSP,DEPT RADIOL,NL-3508 GA UTRECHT,NETHERLANDS. UNIV UTRECHT HOSP,DEPT PATHOL,NL-3508 GA UTRECHT,NETHERLANDS. USAF,DEPT DENT,MED SQUADRON 32,SOESTERBERG AB,NETHERLANDS. RP Koole, R (reprint author), UNIV UTRECHT HOSP,DEPT ORAL & MAXILLOFACIAL SURG G05129,POB 85500,NL-3508 GA UTRECHT,NETHERLANDS. RI Slootweg, P.J./H-8089-2014 NR 10 TC 27 Z9 28 U1 0 U2 2 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0901-5027 J9 INT J ORAL MAX SURG JI Int. J. Oral Maxillofac. Surg. PD JUN PY 1996 VL 25 IS 3 BP 203 EP 205 DI 10.1016/S0901-5027(96)80030-0 PG 3 WC Dentistry, Oral Surgery & Medicine; Surgery SC Dentistry, Oral Surgery & Medicine; Surgery GA VD192 UT WOS:A1996VD19200008 PM 8872224 ER PT J AU Sylvia, VL Schwartz, Z Ellis, EB Helm, SH Gomez, R Dean, DD Boyan, BD AF Sylvia, VL Schwartz, Z Ellis, EB Helm, SH Gomez, R Dean, DD Boyan, BD TI Nongenomic regulation of protein kinase C isoforms by the vitamin D metabolites 1 alpha,25-(OH)(2)D-3 and 24R,25-(OH)(2)D-3 SO JOURNAL OF CELLULAR PHYSIOLOGY LA English DT Article ID ARACHIDONIC-ACID TURNOVER; ZONE CHONDROCYTE CULTURES; CARTILAGE CELLS-INVITRO; RESTING ZONE; GROWTH ZONE; MATRIX VESICLES; PHOSPHOLIPASE-A2 ACTIVITY; ALKALINE-PHOSPHATASE; SIGNAL TRANSDUCTION; PLASMA-MEMBRANE AB Prior studies have shown that vitamin D regulation of protein kinase C activity (PKC) in the cell layer of chondrocyte cultures is cell maturation-dependent. In the present study, we examined the membrane distribution of PKC and whether 1 alpha,25-(OH)(2)D-3 and 24R,25-(OH)(2)D-3 can directly regulate enzyme activity in isolated plasma membranes and extracellular matrix vesicles. Matrix vesicle PKC was activated by bryostatin-1 and inhibited by a PKC-specific pseudosubstrate inhibitor peptide. Depletion of membrane PKC activity using isoform-specific anti-PKC antibodies suggested that PKC alpha is the major isoform in cell layer lysates as well as in plasma membranes isolated from both cell types; PKC zeta is the predominant form in matrix vesicles. This was confirmed in Western blots of immunoprecipitates as well as in studies using control peptides to block binding of the isoform specific antibody to the enzyme and using a PKC zeta-specific pseudosubstrate inhibitor peptide. The presence of PKC zeta in matrix vesicles was further verified by immunoelectron microscopy. Enzyme activity in the matrix vesicle was insensitive to exogenous lipid, whereas that in the plasma membrane required lipid for full activity. 1,25-(OH)(2)D-3 and 24,25-(OH)(2)D-3 inhibited matrix vesicle PKC, but stimulated plasma membrane PKC when added directly to the isolated membrane fractions. PKC activity in the matrix vesicle was calcium-independent, whereas that in the plasma membrane required calcium. Moreover, the vitamin D-sensitive PKC in matrix vesicles was not dependent on calcium, whereas the vitamin D-sensitive enzyme in plasma membranes was calcium-dependent. It is concluded that PKC isoforms are differentially distributed between matrix vesicles and plasma membranes and that enzyme activity is regulated in a membrane-specific manner. This suggests the existence of a nongenomic mechanism whereby the effects of 1,25-(OH)(2)D-3 and 24,25-(OH)(2)D-3 may be mediated via PKC. Further, PKC zeta may be important in nongenomic, autocrine signal transduction at sites distal from the cell. (C) 1996 Wiley-Liss, Inc. C1 UNIV TEXAS,HLTH SCI CTR,DEPT ORTHOPAED,SAN ANTONIO,TX 78284. UNIV TEXAS,HLTH SCI CTR,DEPT BIOCHEM,SAN ANTONIO,TX 78284. WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236. HEBREW UNIV JERUSALEM,HADASSAH FAC DENT MED,DEPT PERIODONT,IL-91010 JERUSALEM,ISRAEL. UNIV TEXAS,HLTH SCI CTR,DEPT PERIODONT,SAN ANTONIO,TX 78284. FU NIDCR NIH HHS [DE-05937, DE-08603] NR 45 TC 85 Z9 85 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0021-9541 J9 J CELL PHYSIOL JI J. Cell. Physiol. PD JUN PY 1996 VL 167 IS 3 BP 380 EP 393 DI 10.1002/(SICI)1097-4652(199606)167:3<380::AID-JCP2>3.0.CO;2-L PG 14 WC Cell Biology; Physiology SC Cell Biology; Physiology GA UL404 UT WOS:A1996UL40400002 PM 8655592 ER PT J AU Holden, MS AF Holden, MS TI The psychological physician: Semantics and survival SO JOURNAL OF CLINICAL PSYCHOLOGY IN MEDICAL SETTINGS LA English DT Article DE psychological physician; health psychology; psychological practice ID POSTDOCTORAL EDUCATION; PROFESSIONAL PSYCHOLOGISTS; NECESSITY AB The calls for change in three areas of professional psychology are briefly reviewed, along with the reasons why such changes would be in the best interest of not only psychology but also the consumers of mental health services. Psychology's survival is linked to the implementation of these changes. It is argued that psychology must (I) standardize its education, training, and doctoral degree; (2) expand its scope of practice; and (3) become, legally and otherwise, ''psychological physicians,'' or risk being rolled-over by history. The importance of terminology and semantics is also discussed. Conclusions are drawn and discussed. C1 USAF,FT GEORGE G MEADE,MD. NR 26 TC 5 Z9 5 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 1068-9583 J9 J CLIN PSYCHOL MED S JI J. Clin. Psychol. Med. Settings PD JUN PY 1996 VL 3 IS 2 BP 159 EP 165 DI 10.1007/BF01996136 PG 7 WC Psychology, Clinical SC Psychology GA UW929 UT WOS:A1996UW92900007 PM 24226643 ER PT J AU Fulk, DA Quinn, DW AF Fulk, DA Quinn, DW TI An analysis of 1-D smoothed particle hydrodynamics kernels SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID SPH AB In this paper, the smoothed particle hydrodynamics (SPH) kernel is analyzed, resulting in measures of merit for one-dimensional SPH. Various methods of obtaining an objective measure of the quality and accuracy of the SPH kernel are addressed. Since the kernel is the key element in the SPH methodology, this should be of primary concern to any user of SPH. The results of this work are two measures of merit, one for smooth data and one near shocks. The measure of merit for smooth data is shown to be quite accurate and a useful delineator of better and poorer kernels. The measure of merit for non-smooth data is not quite as accurate, but results indicate the kernel is much less important for these types of problems. In addition to the theory, 20 kernels are analyzed using the measure of merit demonstrating the general usefulness of the measure of merit and the individual kernels. In general, it was decided that bell-shaped kernels perform better than other shapes. 1996 Academic Press, Inc. RP Fulk, DA (reprint author), USAF,INST TECHNOL,DEPT MATH & STAT,WRIGHT PATTERSON AFB,OH 45433, USA. NR 12 TC 39 Z9 41 U1 2 U2 4 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD JUN PY 1996 VL 126 IS 1 BP 165 EP 180 DI 10.1006/jcph.1996.0128 PG 16 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA UQ164 UT WOS:A1996UQ16400015 ER PT J AU Nachman, A AF Nachman, A TI A brief perspective on computational electromagnetics SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Review ID DIFFRACTION PROBLEMS; NUMERICAL-SOLUTION; BOUNDARIES RP Nachman, A (reprint author), USAF,OFF SCI RES,NM,110 DUNCAN AVE,BOLLING AFB,DC 20332, USA. NR 18 TC 2 Z9 2 U1 0 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD JUN PY 1996 VL 126 IS 1 BP 237 EP 239 DI 10.1006/jcph.1996.0132 PG 3 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA UQ164 UT WOS:A1996UQ16400019 ER PT J AU Anselmo, A Koziol, J Prasad, V AF Anselmo, A Koziol, J Prasad, V TI Full-scale experiments on solid-pellets feed continuous Czochralski growth of silicon crystals SO JOURNAL OF CRYSTAL GROWTH LA English DT Article AB Two long-term solid-pellets feed continuous Czochralski growth experiments were performed in an industrial Czochralski crystal puller as an extension to our previous work [7]. The goals of these experiments were to examine how polysilicon pellets would melt in a standard Cz system, to discover the thermal effects the pellets would have on the overall melt, and to find if pellet addition could be an effective melt replenishment technique. These experiments demonstrate that the quality of the melt for the CCz growth is based heavily on the surface temperature of the melt. A novel characterization method (''impact severity'') is developed to characterize the quality of the CCz melt. Stable feed rate and melt conditions were achieved for three different pull rates. These experiments demonstrate that the process is technically feasible, and can be retrofitted to the existing industrial systems. Several critical issues that need to be addressed to develop a successful CCz process are also discussed. C1 SUNY STONY BROOK,DEPT MECH ENGN,STONY BROOK,NY 11794. USAF,ROME LAB,BEDFORD,MA 01731. FERROFLUID CORP,NASHUA,NH 03061. NR 11 TC 8 Z9 8 U1 3 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD JUN PY 1996 VL 163 IS 4 BP 359 EP 368 DI 10.1016/0022-0248(95)00986-8 PG 10 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA UW511 UT WOS:A1996UW51100004 ER PT J AU Watanabe, M Iijima, T Rich, FJ AF Watanabe, M Iijima, T Rich, FJ TI Synthesis models of dayside held-aligned currents for strong interplanetary magnetic field By SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID LATITUDE BOUNDARY-LAYER; SCALE BIRKELAND CURRENTS; ELECTRIC-FIELDS; LOW-ALTITUDE; PARTICLE-PRECIPITATION; MAGNETOMETER DATA; MID-ALTITUDES; CUSP; REGION; IMF AB Using particle and magnetic field data acquired with DMSP-F6 and DMSP-F7 satellites, we have investigated interplanetary magnetic field (IMF) By dependence of the global pattern of plasma regime and field-aligned currents (FACs) on dayside high latitudes during strong IMF By (averaged \By\ > 3.7 nT) and geomagnetically disturbed (mainly IMF Bz < 0) periods. From particle data we have identified five plasma regimes: inner plasma sheet, outer plasma sheet, cleft, cusp, and mantle. All the plasma domains except the inner plasma sheet show By dependence in spatial distribution. Region 1 and ''traditional cusp'' currents appear in cusp/mantle domains, which we call midday region 1 and region 0 currents, respectively, in this paper. These currents perfectly reverse their flow directions depending on IMF By polarity. Traditional region 1 currents occurring in cleft and outer plasma sheet almost always flow into the ionosphere in the prenoon sector and flow away from the ionosphere in the postnoon sector regardless of By polarity. Thus the midday region 1 and region 0 current system that appears at local noon is not a simple continuation of flankside region 1/region 2 current system. Midday region 1 and region 0 currents are not necessarily balanced in intensity; region 0 current intensity occasionally exceeds midday region 1 current intensity, Furthermore, intensity imbalance also appears in cleft-associated region 1 currents; that is, region 1 current in the farside cleft from the reconnection site (''downstreamside'' cleft) is larger than region 1 current in the nearside cleft (''upstreamside'' cleft). On the basis of these observational facts we discuss the source mechanisms of the dayside FAC system: (1) directly coupled generation of region 0 and midday region 1 current in the cusp/mantle domains around noon and (2) generation of extra region 0 current in the tail magnetopause which is connected to the extra downstreamside cleft-associated region 1 current. C1 USAF,GEOPHYS DIRECTORATE,PHILLIPS LAB,BEDFORD,MA 01731. UNIV TOKYO,DEPT EARTH & PLANETARY PHYS,GRAD SCH SCI,TOKYO 113,JAPAN. NR 49 TC 30 Z9 31 U1 1 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD JUN 1 PY 1996 VL 101 IS A6 BP 13303 EP 13319 DI 10.1029/96JA00482 PG 17 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA UP353 UT WOS:A1996UP35300023 ER PT J AU Kar, A Scott, JE Latham, WP AF Kar, A Scott, JE Latham, WP TI Theoretical and experimental studies of thick-section cutting with a chemical oxygen-iodine laser (COIL) SO JOURNAL OF LASER APPLICATIONS LA English DT Article DE laser cutting materials processing; thick-section cutting; modeling of laser cutting; chemical oxygen-iodine laser; COIL ID MOVING CW LASER; PARAMETERS; MECHANISM AB A simple mathematical model of thick-section stainless steel cutting with a high power chemical oxygen-iodine laser (COIL) is presented and compared with experimental results obtained with a 10-kilowatt COIL at the U.S. Air Force's Phillips Laboratory, This model uses a lumped-parameter technique to relate the cutting kerf depth with various process parameters and can be used to predict scaled laser materials processing performance to very thick sections. The model is similar to an empirical model developed by researchers in Japan, but includes predictive capabilities for thick metal cutting at very low velocities. The effects of various process parameters such as laser power, spot size and dimensions, and processing speed in the cutting depth are discussed and demonstrated. Finally, the ramifications of this model on thick-section processing of metals are presented, with emphasis on potential applications of COIL to high-speed, thick stainless steel cutting. C1 USAF,PHILLIPS LAB,LIDB,APPL LASER TECHNOL LAB,KIRTLAND AFB,NM 87117. USAF,PHILLIPS LAB,LI,LASERS & IMAGING DIRECTORATE,KIRTLAND AFB,NM 87117. RP Kar, A (reprint author), UNIV CENT FLORIDA,CREOL,DEPT MECH & AEROSP ENGN,12424 RES PKWY,SUITE 400,ORLANDO,FL 32826, USA. NR 29 TC 23 Z9 24 U1 0 U2 5 PU LASER INST AMER PI ORLANDO PA 12424 RESEARCH PARKWAY SUITE 125, ORLANDO, FL 32826 SN 1042-346X J9 J LASER APPL JI J. Laser Appl. PD JUN PY 1996 VL 8 IS 3 BP 125 EP 133 PG 9 WC Materials Science, Multidisciplinary; Optics; Physics, Applied SC Materials Science; Optics; Physics GA UR844 UT WOS:A1996UR84400002 ER PT J AU Hull, RJ Lander, ML AF Hull, RJ Lander, ML TI Laser hardened materials evaluation laboratory (LHMEL) SO JOURNAL OF LASER APPLICATIONS LA English DT Article AB Since 1976, the Laser Hardened Materials Evaluation Laboratory (LHMEL) has been characterizing material responses to laser energy in support of national defense programs and the aerospace industry. Now that capability is available to commercial industry as web. LHMEL's power levels, beam uniformity, and diagnostics capabilities make it an ideal facility for proof-of-concept testing or process development Located at Wright-Patterson Air Force Base, Ohio, LHMEL is managed by the Wright Laboratory Materials Directorate and operated by Lawrence Associates, Incorporated, The facility's advanced hardware is centered around two laser systems: the LHMEL I laser, producing 15 kW of continuous-wave (CW) power on target; and LHMEL II, producing 150 kW of CW power on target. Both lasers operate at 10.6 mu m and can deliver stable, full-power irradiations for durations up to 80 s. Both LHMEL devices use a multimode resonator configuration producing a flat-top spatial intensity, distribution. This beam profile delivers a uniform amount of energy over the entire beam diameter and ensures a controlled and repeatable laser exposure on target. The singular capabilities of the LHMEL facility provide unique opportunities for commercial materials processing. Uses of LHMEL might include demonstration of the feasibility of a new materials processing technique before investing capital in its development; simulating the high service life temperatures experienced by parts within an automobile or jet engine; performing a limited production run to laser cut thick steel plates for a special custom order; or using LHMEL's high power to perform deep-penetration welds of steel, aluminum, or titanium. LHMEL has already performed extensive work in the area of thermal load simulation and has begun initial testing efforts in other areas of materials processing. LHMEL's capabilities are perhaps most beneficial in the surface treatment of materials. Applications requiring uniform irradiation of large surface areas to produce the ideal heat treatment with limited or single passes could be satisfied by LHMEL. Initial heat treatment tests have been performed at LHMEL. Other techniques to increase wear resistance, extend service life, or even inhibit surface corrosion might be developed using LHMEL. Tests are performed on a cost-reimbursement basis or, if appropriate, a Cooperative Research and Development Agreement (CRDA) can be negotiated. C1 LAWRENCE ASSOCIATES INC,WRIGHT PATTERSON AFB,OH 45433. RP Hull, RJ (reprint author), USAF,WRIGHT LAB,WRIGHT LAB MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 0 TC 2 Z9 2 U1 2 U2 3 PU LASER INST AMER PI ORLANDO PA 12424 RESEARCH PARKWAY SUITE 125, ORLANDO, FL 32826 SN 1042-346X J9 J LASER APPL JI J. Laser Appl. PD JUN PY 1996 VL 8 IS 3 BP 161 EP 168 PG 8 WC Materials Science, Multidisciplinary; Optics; Physics, Applied SC Materials Science; Optics; Physics GA UR844 UT WOS:A1996UR84400007 ER PT J AU Weiss, I Srinivasan, R Saqib, M Stefansson, N Jackson, AG LeClair, SR AF Weiss, I Srinivasan, R Saqib, M Stefansson, N Jackson, AG LeClair, SR TI Bulk deformation of Ti-6.8Mo-4.5Fe-1.5AI (Timetal LCB*) alloy SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE LA English DT Article DE beta titanium alloys; compression testing; LCB titanium; shear bands; work hardening and softening AB Recently, a low-cost near-beta titanium alloy (Timetal LCB Ti-Q.8Mo-4.5Fe-1.5Al wt %) containing iron and molybdenum has been developed. This alloy is cold formable in the beta microstructure and can be aged to high strengths by precipitating the alpha phase. Due to its combination of cold formability and high strength, the alloy is a potential replacement for steel components in the automotive industry. The current study was undertaken to evaluate the cold bulk forming characteristics of Timetal LCB for use in lightweight automotive applications. Room-temperature compression tests conducted over a strain-rate range of 0.01 to 5/s indicate that the bulk cold compression of the alloy is affected by two factors: the microstructure and the length-to-diameter aspect ratio of the specimen. In the aged condition, when the microstructure has or-phase particles distributed along flow lines in the beta-phase matrix, the alloy has the propensity for shear failure when deformed in compression in a direction parallel to the flow lines. In the solution-heat-treated condition, the microstructure consists of beta grains with athermal omega phase. In this condition, the alloy can be cold compressed to 75 % reduction in height using specimens with aspect ratio of 1.125, but fails by shear for a larger aspect ratio of 1.5. Plastic deformation of the material occurs initially by single slip in most grains, but changes to multiple slip at true plastic strains larger than about 0.15. At a slow strain rate, the deformation is uniform, and the material work hardens continuously. At high strain rates, shear bands develop, and the localized deformation and temperature rise due to deformation heating leads to flow softening during compression. Although there is a considerable rise in temperature (200 to 500 degrees C) during deformation, precipitation of the alpha phase was not observed. C1 USAF,WRIGHT LAB,MAT DIRECTORATE,WL MLIM,WRIGHT PATTERSON AFB,OH 45433. RP Weiss, I (reprint author), WRIGHT STATE UNIV,DEPT MECH & MAT ENGN,DAYTON,OH 45435, USA. NR 22 TC 6 Z9 6 U1 1 U2 4 PU ASM INTERNATIONAL PI MATERIALS PARK PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002 SN 1059-9495 J9 J MATER ENG PERFORM JI J. Mater. Eng. Perform. PD JUN PY 1996 VL 5 IS 3 BP 335 EP 352 DI 10.1007/BF02649336 PG 18 WC Materials Science, Multidisciplinary SC Materials Science GA UN129 UT WOS:A1996UN12900008 ER PT J AU Lair, AV Shaker, AW AF Lair, AV Shaker, AW TI Entire solution of a singular semilinear elliptic problem SO JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS LA English DT Article ID EQUATIONS AB The authors prove that the singular semilinear elliptic equation Delta u + p(x)u(-gamma) = 0, gamma > 0, P(x) greater than or equal to 0, x is an element of R(n), n greater than or equal to 3, has a unique positive C-loc(2+alpha)(R(n)) solution that decays to zero near infinity provided integral(0)(infinity)t phi(t) dt < infinity, where phi(t) = max(\x\=t)p(x). Furthermore, they show that this condition on p is nearly optimal. (C) 1996 Academic Press, Inc. RP Lair, AV (reprint author), USAF,INST TECHNOL,DEPT MATH & STAT,ENC,2950 P ST,WRIGHT PATTERSON AFB,OH 45433, USA. NR 7 TC 60 Z9 65 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0022-247X J9 J MATH ANAL APPL JI J. Math. Anal. Appl. PD JUN 1 PY 1996 VL 200 IS 2 BP 498 EP 505 DI 10.1006/jmaa.1996.0218 PG 8 WC Mathematics, Applied; Mathematics SC Mathematics GA UR156 UT WOS:A1996UR15600016 ER PT J AU Bohnenkamp, DM AF Bohnenkamp, DM TI Replacement of a fractured unilateral removable partial denture with a nonrigid fixed prosthesis: A clinical report SO JOURNAL OF PROSTHETIC DENTISTRY LA English DT Article C1 USAF,SHEPPARD AFB,TX. NR 10 TC 1 Z9 1 U1 0 U2 0 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0022-3913 J9 J PROSTHET DENT JI J. Prosthet. Dent. PD JUN PY 1996 VL 75 IS 6 BP 591 EP 593 DI 10.1016/S0022-3913(96)90241-3 PG 3 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA UP213 UT WOS:A1996UP21300003 PM 8725831 ER PT J AU Kerans, RJ AF Kerans, RJ TI Viability of oxide fiber coatings in ceramic composites for accommodation of misfit stresses SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article AB The C and BN fiber coatings used in most ceramic composites perform a less obvious but equally essential function, in addition to crack deflection; they accommodate misfit stresses due to interfacial fracture surface roughness, Coatings substituted for them must also perform that function to be effective. However, in general, oxides are much less compliant materials than C and BN, which raises the question of the feasibility of oxide substitutes. The viability of oxide coatings for accommodating misfit stresses in Nicalon fiber/SiC composites was investigated by calculating the maximum misfit stresses as functions of coating properties and geometries, Control of interfacial fracture path was also briefly considered, The implications regarding composite properties were examined by calculating properties for composites with mechanically viable oxide coatings. RP Kerans, RJ (reprint author), USAF,WRIGHT LAB,MAT DIRECTORATE,MLLM,WRIGHT PATTERSON AFB,OH 45433, USA. NR 29 TC 14 Z9 14 U1 0 U2 0 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD JUN PY 1996 VL 79 IS 6 BP 1664 EP 1668 DI 10.1111/j.1151-2916.1996.tb08779.x PG 5 WC Materials Science, Ceramics SC Materials Science GA UT219 UT WOS:A1996UT21900034 ER PT J AU Wright, EF Gullickson, DC AF Wright, EF Gullickson, DC TI Identifying acute pulpalgia as a factor in TMD pain SO JOURNAL OF THE AMERICAN DENTAL ASSOCIATION LA English DT Article ID INJECTION AB An acute pulpalgia and temporomandibular disorders can produce many of the same symptoms. To illustrate identification of an acute pulpalgia as a component in TMD, the authors review the evaluation of 11 patients at a clinic that specializes in TMD treatment. During the evaluation, thermal testing and periodontal ligament anesthesia were used to identify the offending tooth. After receiving endodontic treatment or having the tooth extracted, patients reported either complete or partial relief of TMD symptoms. The authors provide questions that may help practitioners identify a tooth with an acute pulpalgia as a contributing factor to TMD symptoms and suggest a technique to confirm this diagnosis. C1 USAF,LACKLAND AFB,TX. NR 17 TC 8 Z9 8 U1 0 U2 1 PU AMER DENTAL ASSN PI CHICAGO PA 211 E CHICAGO AVE, CHICAGO, IL 60611 SN 0002-8177 J9 J AM DENT ASSOC JI J. Am. Dent. Assoc. PD JUN PY 1996 VL 127 IS 6 BP 773 EP 780 PG 8 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA UQ240 UT WOS:A1996UQ24000025 PM 8708279 ER PT J AU Carlson, JL AF Carlson, JL TI So incredibly Idaho! Seven landscapes that define the gem state - Schwantes,CA SO LIBRARY JOURNAL LA English DT Book Review RP Carlson, JL (reprint author), VANDENBERG AFB LIB,VANDENBERG AFB,CA 93437, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD JUN 1 PY 1996 VL 121 IS 10 BP 136 EP 136 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA UP802 UT WOS:A1996UP80200151 ER PT J AU Helmick, LS Sharma, SK AF Helmick, LS Sharma, SK TI Effect of humidity on friction and wear for a linear perfluoropolyalkylether fluid under boundary lubrication conditions SO LUBRICATION ENGINEERING LA English DT Article DE humidity; polyethers; boundary lubrication; synthetic lubricants; friction; wear and failure ID PERFLUOROPOLYETHERS AB Using a Cameron-Plint tribometer under controlled environmental conditions, friction and wear measured for a commercially available linear perfluoropolyalkylether fluid with M-50 steel under boundary lubrication conditions at 50 degrees, 100 degrees, and 150 degrees C with relative humidity ranging from 5 to 100 percent. In general, both fric- tion and wear decrease sharply as humidity in increased from 5 to 20 percent, then are constant as humidity increases to 100 percent. Thus, both friction and wear are highly dependent on humidity when the relative humidity is less than 20 percent. Therefore, to improve repeatability of results, which is a critical factor in developing a reliable method for screening boundary lubrication additives, humidity should be measured when commercially available linear perfluoropolyalkylethers are being tested with steel specimens under boundary lubrication conditions, and carefully controlled if it is 20 percent or less. A possible mechanism to account for the dependence of friction and wear on humidity is also presented. C1 USAF,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433. RP Helmick, LS (reprint author), CEDARVILLE COLL,CEDARVILLE,OH 45314, USA. NR 15 TC 12 Z9 12 U1 0 U2 0 PU SOC TRIBOLOGISTS & LUBRICATION ENGINEERS PI PARK RIDGE PA 838 BUSSE HIGHWAY, PARK RIDGE, IL 60068 SN 0024-7154 J9 LUBR ENG JI Lubric. Eng. PD JUN PY 1996 VL 52 IS 6 BP 437 EP 442 PG 6 WC Engineering, Mechanical SC Engineering GA UR517 UT WOS:A1996UR51700007 ER PT J AU Jones, DIG French, RM Bagley, RL AF Jones, DIG French, RM Bagley, RL TI A renewal theory of small-strain thermo-mechanical response SO MECHANICS OF MATERIALS LA English DT Article ID CREEP AB A small-strain uniaxial model of alloy thermo-mechanical behavior is described. The approach is based on a renewal theory of creep and inelastic behavior, for which inelastic deformation is assumed to arise from the motion of dislocations producing primary and secondary creep, respectively. The process depends fundamentally on an intrinsic or internal time which accumulates at a varying rate which depends on stress and/or temperature history. The resulting time-temperature-stress relationships are readily calculated at low strains. C1 WRIGHT LAB,FLIGHT DYNAM DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. RP Jones, DIG (reprint author), D TECH SYST,2343 LANTERN HILL RD,DAYTON,OH 45459, USA. NR 13 TC 1 Z9 1 U1 2 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-6636 J9 MECH MATER JI Mech. Mater. PD JUN PY 1996 VL 23 IS 2 BP 155 EP 164 DI 10.1016/0167-6636(96)00011-7 PG 10 WC Materials Science, Multidisciplinary; Mechanics SC Materials Science; Mechanics GA VA640 UT WOS:A1996VA64000005 ER PT J AU Menon, ESK Subramanian, PR Dimiduk, DM AF Menon, ESK Subramanian, PR Dimiduk, DM TI Phase transformations in Nb-Al-Ti alloys SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT Symposium on Atomistic Mechanisms of Nucleation and Growth in Solids, at TMS/ASM Materials Week CY OCT 03-05, 1994 CL ROSEMONT, IL SP TMS, ASM ID RIBBONS; SYSTEM AB Phase relationships as well as morphological and crystallographic features in Nb-rich Nb-Al and Nb-Al-Ti alloys have been investigated. The phase boundaries involving the bcc and Nb3Al (Al5 structure) were experimentally determined and several isothermal sections of the Nb-rich corner of the Nb-Al-Ti phase diagram established. The present findings show that (a) the solubility of Al in Nb is considerably less than that reported previously, (b) the high-temperature bcc phase undergoes an ordering transformation to the B2 structure, and (c) the omega phase also forms in these alloys. The sequence of decomposition of the high-temperature bcc phase during isothermal decomposition in the bcc + Nb3Al phase field has been systematically studied in these alloys. A wide variety of morphological features were found to be associated with the Nb3Al precipitates that formed in the bcc/B2 matrix during isothermal heat treatments. The lengthening kinetics of the plate-shaped Nb3Al precipitates were also studied. C1 UNIVERSAL ENERGY SYST INC,DAYTON,OH 45432. USAF,WRIGHT LAB,MLLM,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. RP Menon, ESK (reprint author), USN,POSTGRAD SCH,DEPT MECH ENGN,MAT SCI SECT,MONTEREY,CA 93943, USA. NR 31 TC 40 Z9 42 U1 0 U2 3 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD JUN PY 1996 VL 27 IS 6 BP 1647 EP 1659 DI 10.1007/BF02649822 PG 13 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA UR669 UT WOS:A1996UR66900022 ER PT J AU Nicolaou, PD Semiatin, SL Goetz, RL AF Nicolaou, PD Semiatin, SL Goetz, RL TI An experimental and theoretical investigation of the rapid consolidation of continuously reinforced, metal-matrix composites SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID SIC FIBERS; TITANIUM AB The feasibility of the rapid consolidation of T-14Al-21Nb/SCS-6 foil/fiber/foil composites using a forging approach was established as an alternative to slower and more expensive processes such as those based on hot isostatic pressing (HIP) or vacuum hot pressing (VHP). A firm basis for the technique was developed through theoretical analyses of temperature transients, forging pressures, and fiber fracture. These analyses demonstrated that there exists an optimal forging speed at which the consolidation stresses are a minimum. It was also shown that the flow stress of the encapsulation material relative to that of the densifying layup is an important consideration in achieving full consolidation during forging. Specifically, the difference in flow stress between the two materials influences the magnitude and sign of the in-plane (secondary) stresses that are developed during forging and therefore the rate of pore closure during the latter stages of the process. With regard to fiber fracture, analyses were performed to estimate the axial and tangential stresses during rapid consolidation. The theoretical work was validated by experimental trials using the Ti-14Al-21Nb matrix/silicon carbide fiber system. Measured forging pressures were in good agreement with predictions. Fiber fracture observations indicated that tangential tensile stresses developed in the fiber control failure; a forging window to avoid such failures was thus developed. Finally, it was demonstrated that matrix microstructures and mechanical properties similar to those of conventionally consolidated Ti-14Al-21Nb/silicon carbide composites can be achieved by the forge-consolidation technique. C1 UNIVERSAL ENERGY SYST INC,MAT MFG & PROC DIV,DAYTON,OH 45432. RP Nicolaou, PD (reprint author), WRIGHT LAB,MLLN,MAT DIRECTORATE,DIV MET & CERAM,WRIGHT PATTERSON AFB,OH 45433, USA. RI SEMIATIN, SHELDON/E-7264-2017 NR 30 TC 0 Z9 0 U1 0 U2 3 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD JUN PY 1996 VL 27 IS 6 BP 1719 EP 1730 DI 10.1007/BF02649830 PG 12 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA UR669 UT WOS:A1996UR66900030 ER PT J AU Williams, L Gackstetter, G Fiedler, E Hermesch, C Lando, H AF Williams, L Gackstetter, G Fiedler, E Hermesch, C Lando, H TI Prevalence of tobacco use among first-term Air Force personnel before and after basic military training SO MILITARY MEDICINE LA English DT Article ID SMOKING AB To support the goal of a tobacco-free Air Force, a longitudinal study of 3,531 first-term airmen was conducted during basic military training (BMT) at Lackland Air Force Base, Texas, Tobacco use is currently prohibited during the B-week period of BMT, Three self-reported surveys to determine tobacco use prevalence and behaviors were administered at the beginning, end, and 90 days post-BMT, Results indicate that 36% of men and 29% of women used some form of tobacco prior to BMT, Within 90 days after completing BMT, 74% of matched males and females resumed tobacco use and 6% of matched males and females initiated tobacco use. Regression analysis found that several survey questions could predict 85% of tobacco use and 88% of non-tobacco use after BMT, We conclude that tobacco prohibition during BMT has a small, beneficial effect on post-BMT tobacco use, Further efforts, however, are needed to meet the goal of a tobacco-free Air Force. RP Williams, L (reprint author), WILFORD HALL USAF MED CTR,USAF GEN DENT RESIDENCY,LACKLAND AFB,TX 78236, USA. NR 8 TC 9 Z9 9 U1 0 U2 0 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 SN 0026-4075 J9 MIL MED JI Milit. Med. PD JUN PY 1996 VL 161 IS 6 BP 318 EP 323 PG 6 WC Medicine, General & Internal SC General & Internal Medicine GA UP825 UT WOS:A1996UP82500008 PM 8700324 ER PT J AU Lassen, PM Thompson, IM Helfrick, B AF Lassen, PM Thompson, IM Helfrick, B TI Serum prostate-specific antigen concentration before and after vasectomy SO MILITARY MEDICINE LA English DT Article ID UNITED-STATES MEN; COHORT; CANCER AB Recent epidemiologic studies have suggested that a risk factor for the development of carcinoma of the prostate may be previous vasectomy. As a majority of prostate cancer cases diagnosed in the U.S. are detected by an elevation in prostate-specific antigen (PSA), an elevation in PSA due to vasectomy may underpin this association. There have been no published reports on the relationship between PSA before and after vasectomy, To study this relationship, this study was undertaken to determine the effects of vasectomy on PSA. Twenty-five men undergoing vasectomy were studied with serial PSA determinations prior to and following vasectomy. Analysis of data suggests that PSA is not affected by previous vasectomy and that other causes for an increased detection in this cohort may be operational. RP Lassen, PM (reprint author), WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236, USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 SN 0026-4075 J9 MIL MED JI Milit. Med. PD JUN PY 1996 VL 161 IS 6 BP 356 EP 357 PG 2 WC Medicine, General & Internal SC General & Internal Medicine GA UP825 UT WOS:A1996UP82500017 PM 8700333 ER PT J AU Waller, SG AF Waller, SG TI Visual screening of mobility personnel SO MILITARY MEDICINE LA English DT Letter RP Waller, SG (reprint author), WILFORD HALL USAF MED CTR,DEPT OPHTHALMOL,LACKLAND AFB,TX 78236, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 SN 0026-4075 J9 MIL MED JI Milit. Med. PD JUN PY 1996 VL 161 IS 6 BP A3 EP A3 PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA UP825 UT WOS:A1996UP82500001 PM 8700320 ER PT J AU Amato, AA Barohn, RJ AF Amato, AA Barohn, RJ TI Hereditary neuropathy with liability to pressure palsies: Association with central nervous system demyelination SO MUSCLE & NERVE LA English DT Article DE hereditary neuropathy with liability to pressure palsies; tomaculous neuropathy; central nervous system abnormalities (demyelination); mutations; peripheral myelin protein-22 ID MARIE-TOOTH DISEASE; VISUAL EVOKED-POTENTIALS; TOMACULOUS NEUROPATHY; POLYRADICULONEUROPATHY AB Hereditary neuropathy with liability to pressure palsies (HNPP) is usually caused by a 1.5-Mb deletion in chromosome 17p11.2, the inverse mutation to the duplication seen in the majority of Charcot-Marie-Tooth type 1A (CMT 1A) patients. Although most patients with HNPP present with pressure palsies secondary to mild trauma, the clinical heterogeneity of the neuropathy has become more apparent following the discovery of the mutation, There are reports of central conduction abnormalities in CMT 1, however, there have been no previous reports of central nervous system (CNS) demyelination in HNPP, We report a case of HNPP with the typical DNA mutation whose clinical features and MRI of the brain suggested concurrent CNS demyelination. Further studies of possible CNS involvement in HNPP are warranted. (C) 1996 John Wiley & Sons, Inc. C1 WILFORD HALL USAF MED CTR,DEPT NEUROL,LACKLAND AFB,TX 78236. UNIV TEXAS,SW MED CTR,DEPT NEUROL,DALLAS,TX 75235. NR 22 TC 29 Z9 30 U1 0 U2 2 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0148-639X J9 MUSCLE NERVE JI Muscle Nerve PD JUN PY 1996 VL 19 IS 6 BP 770 EP 773 PG 4 WC Clinical Neurology; Neurosciences SC Neurosciences & Neurology GA UH519 UT WOS:A1996UH51900013 PM 8609929 ER PT J AU Peterson, P Sharma, MP Gavrielides, A AF Peterson, P Sharma, MP Gavrielides, A TI Extraction efficiency and thermal lensing in Tm:YAG lasers SO OPTICAL AND QUANTUM ELECTRONICS LA English DT Article AB We model and compare with experiment the threshold, extraction efficiency and temperature effects in Tm:YAG lasers. In particular, we are concerned with high pump powers where lasing can cease abruptly. We simulate the pump depletion equation with the forward and reverse lasing equations combined with the CW rate equations which include cross-relaxation. The resonator is single-pass, end-pumped Fabry-Perot. Consequently, the equations must be solved numerically with a shooter. Our simulation of these equations gives the z-dependence of the intensities, of the populations and of the heat source. Heating is created by nonradiative decay from the two upper manifolds and by the cross-relaxation energy deficit. This leads to thermal tensing as a function of incident pump power which causes lasing shut-off as the resonator becomes unstable. Our simulations for the slope efficiency, threshold and laser shut-off agree with experiment. Additionally, we show that for pump powers in the range of 15-20 W the core temperature rise is about 40 K and the thermal focal length is in the range 5-6 cm. RP Peterson, P (reprint author), USAF,PHILLIPS LAB,LIDN,NONLINEAR OPT CTR TECHNOL,3550 ABERDEEN AVE SE,KIRTLAND AFB,NM 87117, USA. NR 16 TC 5 Z9 6 U1 0 U2 0 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0306-8919 J9 OPT QUANT ELECTRON JI Opt. Quantum Electron. PD JUN PY 1996 VL 28 IS 6 BP 695 EP 707 DI 10.1007/BF00411303 PG 13 WC Engineering, Electrical & Electronic; Optics SC Engineering; Optics GA UR879 UT WOS:A1996UR87900006 ER PT J AU Syms, CA DelaCruz, A AF Syms, CA DelaCruz, A TI Pediatric otology SO OTOLARYNGOLOGIC CLINICS OF NORTH AMERICA LA English DT Article ID CONGENITAL PERILYMPHATIC FISTULA; CEREBRAL SPINAL-FLUID; ANCHORED HEARING-AID; MIDDLE-EAR; INNER-EAR; OTOSCLEROSIS; CHILDREN; MALFORMATIONS; MANAGEMENT; DEAFNESS AB This article discusses the evaluation and management of children who have congenital atresia, who have a conductive hearing impairment and are candidates for stapedectomy, and who have perilymph fistulas. C1 UNIFORMED SERV UNIV HLTH SCI,F EDWARD HEBERT SCH MED,BETHESDA,MD 20814. WILFORD HALL USAF MED CTR,SAN ANTONIO,TX 78236. HOUSE EAR RES INST,LOS ANGELES,CA. UNIV SO CALIF,LOS ANGELES,CA. NR 43 TC 0 Z9 0 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0030-6665 J9 OTOLARYNG CLIN N AM JI Otolaryngol. Clin. N. Am. PD JUN PY 1996 VL 29 IS 3 BP 407 EP & PG 15 WC Otorhinolaryngology SC Otorhinolaryngology GA UM306 UT WOS:A1996UM30600003 PM 8743340 ER PT J AU McGrath, CM AF McGrath, CM TI Immunotherapy in the treatment of atopic asthma SO PEDIATRIC ASTHMA ALLERGY & IMMUNOLOGY LA English DT Review ID DER-P-I; DERMATOPHAGOIDES-PTERONYSSINUS ANTIGEN; BRONCHOALVEOLAR ALLERGEN CHALLENGE; EOSINOPHIL CHEMOTACTIC ACTIVITY; SKIN-TEST REACTIVITY; DOUBLE-BLIND PLACEBO; MAJOR BASIC-PROTEIN; CAT-INDUCED ASTHMA; T-CELL CLONES; HOUSE-DUST AB Immunotherapy as a management strategy for atopic asthma has recently come into question, prompting a reevaluation of the role of immunotherapy in the treatment of asthma, Evidence that allergens play a critical role in the development of airway inflammation, bronchial hyperreactivity, and asthma is reviewed. Further, evidence that modulation of the immune response to allergens in patients with atopic asthma reduces airway inflammation, improves the clinical course of asthma, and may indeed prevent the development of asthma in atopic patients is presented, Immunotherapy appears to be an effective and irreplaceable adjunct to allergen avoidance and medical therapy in the treatment and prevention of atopic asthma. C1 WILFORD HALL USAF MED CTR,DEPT ALLERGY & IMMUNOL,LACKLAND AFB,TX 78236. NR 113 TC 1 Z9 1 U1 0 U2 1 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 0883-1874 J9 PEDIATR ASTHMA ALLER JI Pediatr. Asthma Allergy Immunol. PD SUM PY 1996 VL 10 IS 2 BP 47 EP 57 DI 10.1089/pai.1996.10.47 PG 11 WC Allergy; Immunology; Pediatrics; Respiratory System SC Allergy; Immunology; Pediatrics; Respiratory System GA VB595 UT WOS:A1996VB59500005 ER PT J AU Alsing, PM Kovanis, V Gavrielides, A Erneux, T AF Alsing, PM Kovanis, V Gavrielides, A Erneux, T TI Lang and Kobayashi phase equation SO PHYSICAL REVIEW A LA English DT Article ID WEAK OPTICAL FEEDBACK; EXTERNAL CAVITY LASER; LIMIT-CYCLE BEHAVIOR; SEMICONDUCTOR-LASERS; DIODES; CHAOS; ROUTE AB Lang and Kobayashi equations for a semiconductor laser subject to optical feedback are investigated by using asymptotic methods. Our analysis is based on the values of two key parameters, namely, the small ratio of the photon and carrier lifetimes and the relatively large value of the linewidth enhancement factor. For low feedback levels, we derive a third-order delay-differential equation for the phase of the laser field. We then show analytically and numerically that this equation admits coexisting branches of stable periodic solutions that appear at different and almost constant amplitudes. These amplitudes are proportional to the roots of the Bessel function J(1)(x). The bifurcation diagram of the phase equation is in good agreement with the numerical bifurcation diagram of the original Lang and Kobayashi equations. We interpret the onset of the periodic solutions as the emergence of a new set of external cavity modes with a more complicated time dependence. C1 FREE UNIV BRUSSELS,B-1050 BRUSSELS,BELGIUM. UNIV NEW MEXICO,DEPT MATH & STAT,ALBUQUERQUE,NM 87131. RP Alsing, PM (reprint author), USAF,PHILLIPS LAB,NONLINEAR OPT CTR,3350 ABERDEEN AVE SE,KIRTLAND AFB,NM 87117, USA. NR 21 TC 77 Z9 80 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JUN PY 1996 VL 53 IS 6 BP 4429 EP 4434 DI 10.1103/PhysRevA.53.4429 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA UR605 UT WOS:A1996UR60500096 ER PT J AU Cohen, Y Adams, WW AF Cohen, Y Adams, WW TI Crystal-solvate phases of poly(p-phenylene benzobisoxazole) SO POLYMER LA English DT Article DE rigid polymer; crystallization; crystal-solvate ID FIBERS; MORPHOLOGY; POLYMERS; SYSTEM; CHAIN AB The crystal structure and morphology in oriented solutions of the rigid polymer poly(p-phenylene benzobisoxazole) (PBZO) in polyphosphoric acid (PPA), at different degrees of exposure to moisture, were studied by transmission electron microscopy and X-ray diffraction. Two crystal solvate forms, crystalline complexes of PBZO and PPA, were found. The form I crystal solvates exhibit several sharp equatorial reflections, whereas only a few broad reflections are observed in the form II state. All crystal solvate phases studied exhibit three-dimensional crystallinity evident in sharp off-meridional reflections. This is considered to be due to unique associations between the protonated PBZO polycations and the PPA anions. Endothermic transitions observed upon heating the crystal solvates are interpreted as dissolution of the form I crystals at about 70 degrees C and crystal-crystal transformation of the form II crystal solvate to PBZO crystals, due to deprotonation above 300 degrees C. A microfibrillar morphology is observed in the oriented PBZO fibre coagulated by immersion in water. Similar microfibrils, less than 10 nm in width, are already observed in the form II crystal solvate state, obtained from the oriented solution by absorption of moisture. Copyright (C) 1996 Elsevier Science Ltd. C1 USAF,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. RP Cohen, Y (reprint author), TECHNION ISRAEL INST TECHNOL,DEPT CHEM ENGN,IL-32000 HAIFA,ISRAEL. RI Adams, Wade/A-7305-2010 NR 23 TC 20 Z9 20 U1 1 U2 2 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0032-3861 J9 POLYMER JI Polymer PD JUN PY 1996 VL 37 IS 13 BP 2767 EP 2774 DI 10.1016/0032-3861(96)87640-3 PG 8 WC Polymer Science SC Polymer Science GA UT175 UT WOS:A1996UT17500025 ER PT J AU JAMIESON, PD AF JAMIESON, PD TI THE UNITED-STATES-ARMY IN THE WEST, 1870-1880 - UNIFORMS, WEAPONS, AND EQUI PMENT - MCCHRISTIAN,DC SO PUBLIC HISTORIAN LA English DT Book Review RP JAMIESON, PD (reprint author), USAF,AIR FORCE HIST SUPPORT OFF,WASHINGTON,DC, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALIF PRESS PI BERKELEY PA JOURNALS DEPT 2120 BERKELEY WAY, BERKELEY, CA 94720 SN 0272-3433 J9 PUBL HISTORIAN JI Public Hist. PD SUM PY 1996 VL 18 IS 3 BP 62 EP 63 PG 2 WC History SC History GA VJ080 UT WOS:A1996VJ08000034 ER PT J AU MILLER, RG AF MILLER, RG TI OCEAN BRIDGE - THE HISTORY OF RAF FERRY-COMMAND - CHRISTIE,CA SO PUBLIC HISTORIAN LA English DT Book Review RP MILLER, RG (reprint author), USAF,AIR FORCE HIST SUPPORT OFF,WASHINGTON,DC 20330, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALIF PRESS PI BERKELEY PA JOURNALS DEPT 2120 BERKELEY WAY, BERKELEY, CA 94720 SN 0272-3433 J9 PUBL HISTORIAN JI Public Hist. PD SUM PY 1996 VL 18 IS 3 BP 68 EP 70 PG 3 WC History SC History GA VJ080 UT WOS:A1996VJ08000015 ER PT J AU Bradshaw, PO Nelson, AG Fanton, JW Yates, T KaganHallet, KS AF Bradshaw, PO Nelson, AG Fanton, JW Yates, T KaganHallet, KS TI Effect of hyperbaric oxygenation on peripheral nerve regeneration in adult male rabbits SO UNDERSEA & HYPERBARIC MEDICINE LA English DT Article DE hyperbaric oxygenation; nerve regeneration; nerve crush injury ID INJURY; FIBERS AB Oxygen environments were used to study the regenerative effects of hyperbaric oxygen on crushed sciatic nerves in 30 adult male rabbits. Six different oxygen environments were used, and treatments were initiated 4 days post injury. Transmission electron microscopy and light microscopy were used to evaluate the regenerative morphology of crushed nerves. The morphology of crushed nerves after 7 wk of treatment with compressed oxygen at 202, 242, and 303 kPa resembled normal uncrushed nerves, with nerve fibers uniformly distributed throughout the section. The treatment groups receiving 202 kPa compressed air, 100% normobaric oxygen, or ambient air did not display morphologies similar to normal uncrushed nerve. The nerves in these animals were edematous and contained disarrayed nerve fibers. Myelination in the animals receiving 100% O-2 at high pressures resembled undamaged nerves. Collagen and blood vessels were more evident in the lower pressure/oxygen tension treatments than in the animals receiving 100% O-2 at higher pressures. The neurofilamentous material inside the crushed control axons was dense, whereas in the axons of animals treated with compressed O-2 it was loosely packed. These differences in morphology suggest that treatments consisting of 100% O-2, under pressure can accelerate a peripheral nerve's recovery from a crush injury. C1 LOUISIANA STATE UNIV,DEPT KINESIOL,BATON ROUGE,LA 70803. VET ADM MED CTR,DEPT NEUROPATHOL,SAN ANTONIO,TX. RP Bradshaw, PO (reprint author), USAF,SCH AEROSP MED,BROOKS AFB,TX 78235, USA. NR 20 TC 20 Z9 21 U1 2 U2 3 PU UNDERSEA & HYPERBARIC MEDICAL SOC INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1066-2936 J9 UNDERSEA HYPERBAR M JI Undersea Hyperb. Med. PD JUN PY 1996 VL 23 IS 2 BP 107 EP 113 PG 7 WC Marine & Freshwater Biology; Medicine, Research & Experimental SC Marine & Freshwater Biology; Research & Experimental Medicine GA UY285 UT WOS:A1996UY28500006 PM 8840479 ER PT J AU Hathaway, DH Gilman, PA Harvey, JW Hill, F Howard, RF Jones, HP Kasher, JC Leibacher, JW Pintar, JA Simon, GW AF Hathaway, DH Gilman, PA Harvey, JW Hill, F Howard, RF Jones, HP Kasher, JC Leibacher, JW Pintar, JA Simon, GW TI GONG observations of solar surface flows SO SCIENCE LA English DT Article ID SPHERICAL HARMONIC-ANALYSIS; STEADY PHOTOSPHERIC FLOWS; VELOCITY-FIELDS; ROTATION; SUN; FEATURES; CONVECTION; SHELL AB Doppler velocity observations obtained by the Global Oscillation Network Group (GONG) instruments directly measure the nearly steady flows in the solar photosphere. The sun's differential rotation is accurately determined from single observations. The rotation profile with respect to latitude agrees well with previous measures, but it also shows a slight north-south asymmetry. Rotation profiles averaged over 27-day rotations of the sun reveal the torsional oscillation signal-weak, jetlike features, with amplitudes of 5 meters per second, that are associated with the sunspot latitude activity belts. A meridional circulation with a poleward flow of about 20 meters per second is also evident, Several characteristics of the surface flows suggest the presence of large convection cells. C1 NATL CTR ATMOSPHER RES,HIGH ALTITUDE OBSERV,BOULDER,CO 80303. UNIV NEBRASKA,DEPT PHYS,OMAHA,NE 68182. NATL SOLAR OBSERV,SOLAR RES BRANCH,GEOPHYS DIRECTORATE,PHILLIPS LAB,USAF,MAT COMMAND,SUNSPOT,NM 88349. NATL OPT ASTRON OBSERV,NATL SOLAR OBSERV,NASA,GODDARD SPACE FLIGHT CTR,SW SOLAR STN,TUCSON,AZ 85726. RP Hathaway, DH (reprint author), NASA,GEORGE C MARSHALL SPACE FLIGHT CTR,SPACE SCI LAB,SOLAR PHYS BRANCH,MAIL CODE ES82,HUNTSVILLE,AL 35812, USA. NR 37 TC 106 Z9 106 U1 0 U2 3 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAY 31 PY 1996 VL 272 IS 5266 BP 1306 EP 1309 DI 10.1126/science.272.5266.1306 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA UN472 UT WOS:A1996UN47200036 ER PT J AU Evwaraye, AO Smith, SR Mitchel, WC Roth, MD AF Evwaraye, AO Smith, SR Mitchel, WC Roth, MD TI Determination of the activation energy epsilon(3) for impurity conduction in n-type 4H-SiC SO APPLIED PHYSICS LETTERS LA English DT Article AB Impurity conduction (or hopping conduction) has been observed in the mole heavily n-type 4H-SiC samples by both temperature dependent resistivity measurements and thermal admittance spectroscopy. The measured activation energies epsilon(3) for hopping were 4-5 meV and 2.3-3.0 meV, respectively. No evidence of hopping conduction was seen by either method in the sample where N-D-N-A<10(18) cm(-3). The thermal admittance spectrum of the lightly n-type sample showed the two nitrogen levels at 53 and 100 meV. C1 UNIV DAYTON,DEPT PHYS,DAYTON,OH 45469. UNIV DAYTON,RES INST,DAYTON,OH 45469. RP Evwaraye, AO (reprint author), MLPO,MAT DIRECTORATE,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433, USA. NR 16 TC 10 Z9 10 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 27 PY 1996 VL 68 IS 22 BP 3159 EP 3161 DI 10.1063/1.115810 PG 3 WC Physics, Applied SC Physics GA UM643 UT WOS:A1996UM64300033 ER PT J AU Ishaug, SL Payne, RG Yaszemski, MJ Aufdemorte, TB Bizios, R Mikos, AG AF Ishaug, SL Payne, RG Yaszemski, MJ Aufdemorte, TB Bizios, R Mikos, AG TI Osteoblast migration on poly(alpha-hydroxy esters) SO BIOTECHNOLOGY AND BIOENGINEERING LA English DT Article DE osteoblast; migration; poly(alpha-hydroxy esters); poly(DL-lactic-co-glycolic acid); PLGA; biodegradable polymers; tissue engineering ID CONTACT-INHIBITED CELLS; GROWTH-FACTOR-BETA; EXTRACELLULAR-MATRIX; THEORETICAL-MODELS; PROLIFERATION; BEHAVIOR; SURFACES; CULTURE; ROLES AB We investigated the migration of rat calvaria osteoblast populations on poly(cr-hydroxy ester) films for up to 14 days to determine effects of substrate composition and culture conditions on the migratory characteristics of osteoblasts. Initial osteoblast culture conditions included cell colonies formed by seeding a high (84,000 cells/cm(2)) or low (42,000 cells/cm(2)) density of isolated osteoblasts on the polymer films, and bone tissue cultures formed by plating bone chips directly on the substrates. High density osteoblast colonies cultured and allowed to migrate and proliferate radially on 85:15 poly(DL-lactic-coglycolic acid) (PLGA) films, 75:25 PLGA films, and tissue culture polystyrene controls demonstrated that the copolymer ratio in the polymer films did not affect the rate of increase in substrate surface area (or culture area) covered by the growing cell colony. However, the rate of increase in culture area was dependent on the initial osteoblast seeding density. Initial cell colonies formed with a lower osteoblast seeding density on 75:25 PLGA resulted in a lower rate of increase in culture area, specifically 4.9 +/- 0.3 mm(2)/day, versus 14.1 +/- 0.7 mm(2)/day for colonies seeded with a higher density of cells on the same polymer films. The proliferation rate for osteoblasts in the high and low density seeded osteoblast colonies did not differ, whereas the proliferation rate for the osteoblasts arising from the bone chips was lower than either of these isolated cell colonies. Confocal and light microscopy revealed that the osteoblast migration occurred as a monolayer of individual osteoblasts and not a calcified tissue front. These results demonstrated that cell seeding conditions strongly affect the rates of osteoblast migration and proliferation on biodegradable poly(rr-hydroxy esters). (C) 1996 John Wiley & Sons, Inc. C1 RICE UNIV,DEPT CHEM ENGN,COX LAB BIOMED ENGN,HOUSTON,TX 77251. RICE UNIV,INST BIOSCI & BIOENGN,HOUSTON,TX 77251. WILFORD HALL USAF MED CTR,DEPT ORTHOPAED SURG,LACKLAND AFB,TX 78236. UNIV TEXAS,HLTH SCI CTR,DEPT PATHOL,SAN ANTONIO,TX 78284. RENSSELAER POLYTECH INST,DEPT BIOMED ENGN,TROY,NY 12180. NR 26 TC 32 Z9 32 U1 0 U2 2 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0006-3592 J9 BIOTECHNOL BIOENG JI Biotechnol. Bioeng. PD MAY 20 PY 1996 VL 50 IS 4 BP 443 EP 451 DI 10.1002/(SICI)1097-0290(19960520)50:4<443::AID-BIT12>3.0.CO;2-K PG 9 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA UG326 UT WOS:A1996UG32600013 PM 18626994 ER PT J AU Zambon, M Hay, A Wood, J Gust, I Hampson, A Canas, L Guo, Y AF Zambon, M Hay, A Wood, J Gust, I Hampson, A Canas, L Guo, Y TI Update: Influenza activity - United States and worldwide, 1995-96 season, and composition of the 1996-97 influenza vaccine (Reprinted from MMWR, vol 45, pg 326-329, 1996) SO JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION LA English DT Reprint C1 NATL INST MED RES,LONDON NW7 1AA,ENGLAND. NATL INST BIOL STAND & CONTROLS,POTTERS BAR EN6 3QG,HERTS,ENGLAND. COMMONWEALTH SERUM LABS,PARKVILLE,VIC 3052,AUSTRALIA. ARMSTRONG LAB,BROOKS AFB,TX. NATL CTR PREVENT MED,INST VIROL,BEIJING,PEOPLES R CHINA. WHO,NATL INFLUENZA CTR,DIV EMERGING & OTHER COMMUNICABLE DIS SURVEILLANC,CH-1211 GENEVA,SWITZERLAND. CDC,INFLUENZA BR,DIV VIRAL & RICKETTSIAL DIS,NATL CTR INFECT DIS,ATLANTA,GA 30333. US FDA,DIV VIROL,CTR BIOL EVALUAT & RES,ROCKVILLE,MD 20857. RP Zambon, M (reprint author), CENT PUBL HLTH LAB,LONDON NW9 5HT,ENGLAND. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0098-7484 J9 JAMA-J AM MED ASSOC JI JAMA-J. Am. Med. Assoc. PD MAY 15 PY 1996 VL 275 IS 19 BP 1467 EP 1468 PG 2 WC Medicine, General & Internal SC General & Internal Medicine GA UJ937 UT WOS:A1996UJ93700009 ER PT J AU Evwaraye, AO Smith, SR Mitchel, WC AF Evwaraye, AO Smith, SR Mitchel, WC TI Shallow and deep levels in n-type 4H-SiC SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID PERSISTENT PHOTOCONDUCTIVITY; NITROGEN DONORS; CARBIDE AB The nitrogen levels in 4H-SiC have been determined using thermal admittance spectroscopy. The values of E(c)-0.053 eV for nitrogen at the hexagonal site and E(c)-0.10 eV for nitrogen at the quasicubic site agree with those reported using other techniques. The deep levels in 4H-SiC were studied using optical admittance spectroscopy. The optical admittance spectrum showed, besides the conductance peak corresponding to band to band transitions, four other conductance peaks. These peaks correspond to photoexcitation of carriers from the defect levels to the conduction band. It is inferred from a comparison with 6H-SiC that the conductance peak b4 is due to excitation of electrons from the vanadium donor at E(c)-1.73 eV. The photoconductance build up transients of the E(c)-1.73 eV level are described fully by one exponential term. This suggests that only one center contributed to the observed conductance. The decay kinetics of persistent photoconductance due to the E(c)-1.73 eV level follow the stretched exponential form. The potential barrier against recapture of photoexcited carriers was determined to be 18 meV for the vanadium donor level in 4H-SiC. (C) 1996 American Institute of Physics. C1 UNIV DAYTON,DEPT PHYS,DAYTON,OH 45469. RP Evwaraye, AO (reprint author), WRIGHT LAB,MAT DIRECTORATE,MLPO,WRIGHT PATTERSON AFB,OH 45433, USA. NR 16 TC 23 Z9 23 U1 0 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 1996 VL 79 IS 10 BP 7726 EP 7730 DI 10.1063/1.362376 PG 5 WC Physics, Applied SC Physics GA UK226 UT WOS:A1996UK22600040 ER PT J AU Johnson, RO Perram, GP Roh, WB AF Johnson, RO Perram, GP Roh, WB TI Spin-orbit relaxation kinetics of Br(4 P-2(1/2)) SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID VIBRATIONAL-ENERGY-TRANSFER; INFRARED FLUORESCENCE; HCN; DEACTIVATION; SPECTROSCOPY; BR(42P1/2); LASERS; ATOMS; STATE; RATES AB Pulsed and steady-state photolysis techniques have been employed to measure the rate coefficients for collisional deactivation of the spin-orbit excited state of atomic bromine, Br(4 P-2(1/2)). Pulsed lifetime studies for quenching by Br-2 and CO2 yielded absolute rate coefficients at room temperature of k(Br2) = 1.2+/-0.1 x 10(-12) and k(CO2) = 1.5+/-0.3x10(-11) cm(3)/molecules. The rate coefficients for quenching by rare gases, N-2 O-2, NO, NO2, N2O, CO, CO2, COS, SO2, SF6, CF4, CH4, H2S, H-2, D-2, HBr, HCl, and HI, relative to that for Br-2 were determined in a steady-state photolysis experiment. Correlation of the deactivation probabilities with energy defect for the case of electronic-to-vibrational energy transfer is demonstrated. C1 USAF,INST TECHNOL,DEPT ENGN PHYS,WRIGHT PATTERSON AFB,OH 45433. OI Perram, Glen/0000-0002-4417-3929 NR 40 TC 17 Z9 17 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 8 PY 1996 VL 104 IS 18 BP 7052 EP 7058 DI 10.1063/1.471422 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA UJ114 UT WOS:A1996UJ11400016 ER PT J AU Berry, RJ Burgess, DRF Nyden, MR Zachariah, MR Melius, CF Schwartz, M AF Berry, RJ Burgess, DRF Nyden, MR Zachariah, MR Melius, CF Schwartz, M TI Halon thermochemistry: Calculated enthalpies of formation of chlorofluoromethanes SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID SET CORRELATION ENERGIES; VALENCE BOND MODEL; ELECTRONIC-STRUCTURE; GAUSSIAN-2 THEORY; CHEMISTRY; 1ST-ROW; ATOM AB The ab initio G2, G2(MP2), CBS-4, CBS-Q, and BAC-MP4 methods have been used to calculate the enthalpies of formation of the series of four chloromethanes and six chlorofluoromethanes [CHxFyCl4-x-y, x = 0-3, y = 0-3]. Calculated values of Delta(f)H degrees using the first four ab initio methods exhibit comparatively large systematic negative errors compared with experimental values, up to -50 kJ/mol, which are nearly linearly dependent upon the number of C-F and C-Cl bonds in the molecule. It is found for the chlorofluoromethanes that the application of bond additivity corrections (BAC's) to the ab initio enthalpies effectively removes systematic errors in the calculations and yields values that are in close agreement with experimentally derived heats. The rms deviations of the corrected calculated enthalpies from the experimental values are 2.4, 2.6, 3.4, 4.7, and 3.8 kJ/mol for the G2(MP2), G2, CBS-Q, CBS-4, and BAC MP4 methods, respectively. These deviations are lower than the rms errors (6.9 kJ/mol) in the experimental enthalpies. Therefore, it is concluded that any of these calculational procedures, together with bond additivity corrections to remove systematic error, may profitably be used to obtain accurate enthalpies of formation in chlorofluorocarbon species. C1 NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899. SANDIA NATL LABS,LIVERMORE,CA 94551. UNIV N TEXAS,DEPT CHEM,DENTON,TX 76203. USAF,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. NR 41 TC 43 Z9 43 U1 2 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAY 2 PY 1996 VL 100 IS 18 BP 7405 EP 7410 DI 10.1021/jp953427e PG 6 WC Chemistry, Physical SC Chemistry GA UJ117 UT WOS:A1996UJ11700015 ER PT J AU Ross, CA Jerome, DM Tedesco, JW Hughes, ML AF Ross, CA Jerome, DM Tedesco, JW Hughes, ML TI Moisture and strain rate effects on concrete strength SO ACI MATERIALS JOURNAL LA English DT Article DE compressive strength; concretes; moisture content (of aggregate, hardened concrete, etc); strains; tensile strength ID TESTS AB The effects of strain rate and the coupled effects of moisture content and strain rate on concrete strength are experimentally investigated. Dry concrete exhibits clearly defined strain rate transition regions for both tension and compression. Significant strength increases in dry concrete are observed only at strain rates above the transition regions. Wet concrete, however, experiences appreciable increases in strength at strain rates both below and above the dry concrete transition region. An analytical expression has been derived that accurately predicts the tensile fracture strength of dry concrete. This expression can be modified to account for moisture content in concrete. C1 UNIV FLORIDA,GAINESVILLE,FL 32611. WRIGHT LAB,ARMAMENT DIRECTORATE,EGLIN AFB,FL. AUBURN UNIV,AUBURN,AL 36849. WRIGHT LAB,AIR BASE SURVIVABIL SECT,TYNDALL AFB,FL. NR 28 TC 139 Z9 179 U1 2 U2 19 PU AMER CONCRETE INST PI FARMINGTON HILLS PA 38800 INTERNATIONAL WAY, COUNTRY CLUB DRIVE, PO BOX 9094, FARMINGTON HILLS, MI 48333-9094 SN 0889-325X J9 ACI MATER J JI ACI Mater. J. PD MAY-JUN PY 1996 VL 93 IS 3 BP 293 EP 300 PG 8 WC Construction & Building Technology; Materials Science, Multidisciplinary SC Construction & Building Technology; Materials Science GA UT225 UT WOS:A1996UT22500012 ER PT J AU Semiatin, SL Soper, JC Sukonnik, IM AF Semiatin, SL Soper, JC Sukonnik, IM TI Short-time beta grain growth kinetics for a conventional titanium alloy SO ACTA MATERIALIA LA English DT Article AB The kinetics of beta grain growth during short-time, supertransus heat treatment of Ti-6Al-4V were determined using a salt-pot technique. The finite-time, subtransus temperature transient during salt-pot heating was quantified through measurements of the heat transfer coefficient characterizing conduction across the salt-titanium interface and a simple heat conduction analysis which incorporated temperature transient were successfully fit to the parabolic grain growth law d(n) - d(0)(n) = kt exp(-Q/RT) using an exponent n equal to 2.0. Comparison of the present results to rapid, continuous heat treatment data in the literature for a similar titanium alloy revealed a number of semi-quantitative similarities. C1 TEXAS INSTRUMENTS INC,ATTLEBORO,MA 02703. WRIGHT STATE UNIV,DAYTON,OH 45435. RP Semiatin, SL (reprint author), USAF,WRIGHT LAB,MAT DIRECTORATE,WL MLLN,WRIGHT PATTERSON AFB,OH 45433, USA. RI SEMIATIN, SHELDON/E-7264-2017 NR 19 TC 31 Z9 40 U1 0 U2 14 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD MAY PY 1996 VL 44 IS 5 BP 1979 EP 1986 DI 10.1016/1359-6454(95)00311-8 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA UF046 UT WOS:A1996UF04600023 ER PT J AU Shaw, LL Miracle, DB AF Shaw, LL Miracle, DB TI Effects of an interfacial region on the transverse behavior of metal-matrix composites - A finite element analysis SO ACTA MATERIALIA LA English DT Article ID INDUCED RESIDUAL-STRESSES; FIBER DISTRIBUTION; DEFORMATION; PLASTICITY; ALUMINUM; COATINGS; DAMAGE AB An interfacial region (i.e. an interface coating or a reaction product) between the fiber and matrix is known to exist in most metal-matrix composites. Since the load transfer between the fiber and matrix depends on the properties and conditions of this interfacial region, :he mechanical behavior of the composites is strongly affected by its characteristics. In this study, finite element analysis has been used to investigate the distribution of residual thermal stresses in the interfacial region, characteristics of interfacial crack initiation and propagation, and mechanical response of the composites under transverse tensile loading. The matrix material is taken to be Ti-6A1-4V (wt%) and behaves elasto-plastically, while the SiC-fiber is assumed to be elastic. The interface is treated as a thin layer with a finite thickness between the fiber and matrix. Three separate interfacial conditions (i.e. a graded carbon coating, a Y2O3 coating and an uncoated interface) have been considered to evaluate the influence of the (independent) thermal and mechanical properties of the interfacial region. For comparison, an infinitely strong bond al the interface is also assessed. The results indicate that the properties of the interfacial region affect the stress distribution, the interfacial crack initiation and propagation, and the mechanical response of the composites. Based on these results, the thermal and mechanical properties of the coating for improved performance of the composites under transverse loading conditions are proposed. C1 UNIV CONNECTICUT,INST MAT SCI,STORRS,CT 06269. USAF,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. RP Shaw, LL (reprint author), UNIV CONNECTICUT,DEPT MET,STORRS,CT 06269, USA. NR 52 TC 30 Z9 33 U1 1 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD MAY PY 1996 VL 44 IS 5 BP 2043 EP 2055 DI 10.1016/1359-6454(95)00270-7 PG 13 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA UF046 UT WOS:A1996UF04600028 ER PT J AU Heiser, WH McClure, HB Wood, CW AF Heiser, WH McClure, HB Wood, CW TI Simulating heat addition via mass addition in variable area compressible flows SO AIAA JOURNAL LA English DT Article RP Heiser, WH (reprint author), USAF ACAD,DEPT AERONAUT,COLORADO SPRINGS,CO 80840, USA. NR 5 TC 1 Z9 1 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0001-1452 J9 AIAA J JI AIAA J. PD MAY PY 1996 VL 34 IS 5 BP 1076 EP 1078 DI 10.2514/3.13192 PG 3 WC Engineering, Aerospace SC Engineering GA UH935 UT WOS:A1996UH93500030 ER PT J AU Perry, RL Satin, AJ Barth, WH Valtier, S Cody, JT Hankins, GDV AF Perry, RL Satin, AJ Barth, WH Valtier, S Cody, JT Hankins, GDV TI The pharmacokinetics of oxytocin as they apply to labor induction SO AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY LA English DT Article DE oxytocin; pharmacokinetics; labor induction ID ACTIVE MANAGEMENT; PLASMA OXYTOCIN; STIMULATION AB OBJECTIVE: Our purpose was to determine the relationship among plasma oxytocin levels, metabolic clearance rate of oxytocin, and uterine activity in gravid women undergoing labor induction. STUDY DESIGN: Ten women receiving oxytocin for labor induction and agreeing to participate had blood sampled before initiation of oxytocin and at different levels of uterine pressure. Samples were analyzed with 200 mu l extracts from 1 ml of plasma with an oxytocin radioimmunoassay. The intraassay coefficient of variation was <3%. Sensitivity of the assay was 1.5 pg/ml. Pharmacokinetic parameters including plasma levels and metabolic clearance rates were calculated Data were analyzed with the paired t test and linear and logistic regression. RESULTS: Mean oxytocin levels and metabolic clearance rates were 26.6 pg/ml and 7.97 ml/min. There was no correlation between changes in oxytocin level and metabolic clearance rate. Increases in infusion rates were correlated with increases in oxytocin levels (r = 0.71, p < 0.001). Cervical dilatation and uterine contraction pressures did not correlate with oxytocin levels. CONCLUSION: Peripheral plasma levels of oxytocin may not accurately reflect uterine activity or progress in labor. Plasma levels of oxytocin may merely reflect the rate of oxytocin infusion. C1 WILFORD HALL USAF MED CTR,PSO,DEPT OBSTET & GYNECOL,LACKLAND AFB,TX 78236. WILFORD HALL USAF MED CTR,CLIN INVEST DIRECTORATE,LACKLAND AFB,TX 78236. NR 16 TC 7 Z9 7 U1 1 U2 4 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0002-9378 J9 AM J OBSTET GYNECOL JI Am. J. Obstet. Gynecol. PD MAY PY 1996 VL 174 IS 5 BP 1590 EP 1593 DI 10.1016/S0002-9378(96)70611-7 PG 4 WC Obstetrics & Gynecology SC Obstetrics & Gynecology GA UQ173 UT WOS:A1996UQ17300033 PM 9065134 ER PT J AU Khawly, JA Ferrone, PJ Holck, DEE AF Khawly, JA Ferrone, PJ Holck, DEE TI Choroidal hemorrhage associated with systemic tissue plasminogen activator SO AMERICAN JOURNAL OF OPHTHALMOLOGY LA English DT Article ID MELANOMA AB PURPOSE: To determine the cause of spontaneous choroidal hemorrhage in a 67-year-old man after a myocardial infarction and administration of tissue plasminogen activator. METHODS: The patient underwent ocular examination. RESULTS: The patient retained excellent visual acuity and the choroidal hemorrhage resolved completely within two months. CONCLUSION: The administration of tissue plasminogen activator was responsible for the large extent of hemorrhage and should be considered in the differential diagnosis of hemorrhagic choroidal detachment. C1 ASSOCIATED RETINAL CONSULTANTS,ROYAL OAK,MI. WILFORD HALL USAF MED CTR,DEPT OPHTHALMOL,LACKLAND AFB,TX 78236. RP Khawly, JA (reprint author), DUKE UNIV,CTR EYE,DEPT OPHTHALMOL,POB 3802,DURHAM,NC 27710, USA. NR 3 TC 23 Z9 24 U1 0 U2 0 PU OPHTHALMIC PUBL CO PI CHICAGO PA 77 WEST WACKER DR, STE 660, CHICAGO, IL 60601 SN 0002-9394 J9 AM J OPHTHALMOL JI Am. J. Ophthalmol. PD MAY PY 1996 VL 121 IS 5 BP 577 EP 578 PG 2 WC Ophthalmology SC Ophthalmology GA UJ072 UT WOS:A1996UJ07200018 PM 8610807 ER PT J AU May, DA Purins, JL Smith, DK AF May, DA Purins, JL Smith, DK TI MR imaging of occult traumatic fractures and muscular injuries of the hip and pelvis in elderly patients SO AMERICAN JOURNAL OF ROENTGENOLOGY LA English DT Article; Proceedings Paper CT 95th Annual Meeting of the American-Roentgen-Ray-Society CY APR 30-MAY 05, 1995 CL WASHINGTON, DC SP Amer Roentgen Ray Soc AB Recent studies have shown the usefulness of T1-weighted MR imaging for identifying fractures of the proximal femur in elderly patients with negative radiographs after acute trauma [1-4]. The advent of fast spin-echo and fast inversion recovery sequences allows for the rapid identification of a variety of other musculoskeletal injuries of the hip and pelvis that may explain a patient's symptoms but that may not be seen on T1-weighted images. This pictorial essay shows the types of lesions encountered. Lesion prevalence is given for 20 consecutive patients examined. C1 WILFORD HALL USAF MED CTR,SAN ANTONIO,TX 78236. NR 6 TC 21 Z9 21 U1 0 U2 0 PU AMER ROENTGEN RAY SOC PI RESTON PA 1891 PRESTON WHITE DR SUBSCRIPTION FULFILLMENT, RESTON, VA 22091 SN 0361-803X J9 AM J ROENTGENOL JI Am. J. Roentgenol. PD MAY PY 1996 VL 166 IS 5 BP 1075 EP 1078 PG 4 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA UF853 UT WOS:A1996UF85300013 PM 8615246 ER PT J AU Brown, TM Skop, BP Mareth, TR AF Brown, TM Skop, BP Mareth, TR TI Pathophysiology and management of the serotonin syndrome SO ANNALS OF PHARMACOTHERAPY LA English DT Article ID REUPTAKE INHIBITORS; PLATELET 5-HYDROXYTRYPTAMINE; MOTOR CONTROL; RED WINE; RECEPTORS; RELEASE; 5-HT; BLOOD; METABOLISM; BRAIN AB OBJECTIVE: To review the symptoms, pathophysiology, and treatment of the serotonin syndrome (SS). DATA SOURCES: A MEDLINE search (1957-1995) of the English-language literature pertaining to the SS was performed. Additional literature was obtained from reference lists of pertinent articles identified through the search. STUDY SELECTION AND DATA EXTRACTION: All articles were considered for possible inclusion in the review. Pertinent information, as judged by the authors, was selected for discussion. DATA SYNTHESIS: The SS, an occasionally fatal disorder, is characterized by symptoms such as mental status changes, seizures, myoclonus, and blood dyscrasias. Both the central and peripheral serotonergic systems and several serotonin receptor types are involved in the symptomatology of the SS. The pathogenesis of SS may be due to endogenous as well as iatrogenic deficits in peripheral serotonin metabolism, a stimulus for release of serotonin, and interactions with other neurotransmitter systems. Lorazepam, serotonin-blockers, and nitroglycerin have been used successfully to treat SS. CONCLUSIONS: The SS is increasingly recognized and reported in the literature. Clinical and basic science research have increased our understanding of the pathophysiology, conditions, and agents that may predispose to the development of the syndrome. Newer treatment strategies are discussed. C1 WILFORD HALL USAF MED CTR,DEPT PSYCHIAT,OUTPATIENT SERV,LACKLAND AFB,TX 78236. RP Brown, TM (reprint author), WILFORD HALL USAF MED CTR,PSCCE,DEPT PSYCHIAT,EMERGENCY SERV,2200 BERGQUIST DR,SUITE 1,LACKLAND AFB,TX 78236, USA. NR 61 TC 78 Z9 79 U1 0 U2 1 PU HARVEY WHITNEY BOOKS CO PI CINCINNATI PA PO BOX 42696, CINCINNATI, OH 45242 SN 1060-0280 J9 ANN PHARMACOTHER JI Ann. Pharmacother. PD MAY PY 1996 VL 30 IS 5 BP 527 EP 533 PG 7 WC Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA UJ215 UT WOS:A1996UJ21500017 PM 8740336 ER PT J AU Haverly, RM Harrison, CR Dougherty, TH AF Haverly, RM Harrison, CR Dougherty, TH TI Yersinia enterocolitica bacteremia associated with red blood cell transfusion SO ARCHIVES OF PATHOLOGY & LABORATORY MEDICINE LA English DT Article AB A chronically ill, 80-year-old man received over three fourths of a unit of CPDA-1 red blood cells contaminated with Yersinia enterocolitica serotype 0:3. He experienced rigors, high fever, elevated blood pressure, and increased pulse rate. He was treated with antibiotics and discharged in stable condition 6 days later. The blood donor, an Air Force recruit, was asymptomatic at the time of donation but recalled having had diarrhea 4 days earlier. In addition, several other flight members were reported to have had diarrhea at the same time. Serologic evidence suggested that the donor had had a recent infection with Y enterocolitica serotype 0:3. C1 UNIV TEXAS,HLTH SCI CTR,DEPT PATHOL,SAN ANTONIO,TX 78284. WILFORD HALL USAF MED CTR,DEPT PATHOL,SAN ANTONIO,TX. NR 14 TC 6 Z9 6 U1 0 U2 0 PU COLLEGE AMER PATHOLOGISTS PI NORTHFIELD PA C/O KIMBERLY GACKI, 325 WAUKEGAN RD, NORTHFIELD, IL 60093-2750 SN 0003-9985 J9 ARCH PATHOL LAB MED JI Arch. Pathol. Lab. Med. PD MAY PY 1996 VL 120 IS 5 BP 499 EP 500 PG 2 WC Medical Laboratory Technology; Medicine, Research & Experimental; Pathology SC Medical Laboratory Technology; Research & Experimental Medicine; Pathology GA UN128 UT WOS:A1996UN12800020 PM 8639056 ER PT J AU Rubey, WA Striebich, RC Bush, J Centers, PW Wright, RL AF Rubey, WA Striebich, RC Bush, J Centers, PW Wright, RL TI Neurotoxin formation from pilot-scale incineration of synthetic ester turbine lubricants with a triaryl phosphate additive SO ARCHIVES OF TOXICOLOGY LA English DT Article DE trimethylolpropane esters; triarylphosphate; tricresyl phosphate; trimethylolpropane phosphate; neurotoxin; pilot scale incineration ID DECOMPOSITION AB The high-temperature combustion of synthetic ester turbine engine lubricants has been performed by diluting the lubricant 5, 15, or 25% in diesel fuel and burning the mixture in a pilot-scale boiler facility. The effluent gas from this combustion system was carefully monitored for the formation of a potent neurotoxin, trimethylolpropane phosphate (TMPP). Although TMPP was not detected in the gaseous effluent, elevated levels of the neurotoxin were found in scrapings from the inside of the boiler system. Because of the extreme toxicity of this compound, significant dermal exposure could be a potential risk to incinerator operation and maintenance personnel. C1 UNIV DAYTON,RES INST,ENVIRONM SCI GRP,DAYTON,OH 45469. WL POSL,AERO PROP & POWER DIRECTORATE,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433. NR 8 TC 11 Z9 11 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0340-5761 J9 ARCH TOXICOL JI Arch. Toxicol. PD MAY PY 1996 VL 70 IS 8 BP 508 EP 509 DI 10.1007/s002040050306 PG 2 WC Toxicology SC Toxicology GA UP630 UT WOS:A1996UP63000007 PM 8783815 ER PT J AU Bruno, JG Sincock, SA Stopa, PJ AF Bruno, JG Sincock, SA Stopa, PJ TI Highly selective acridine and ethidium staining of bacterial DNA and RNA SO BIOTECHNIC & HISTOCHEMISTRY LA English DT Article DE acridine dyes; ethidium bromide; gel electrophoresis; DNA; RNA; proteins; fluorescence ID POLYACRYLAMIDE GELS; ORANGE; ELECTROPHORESIS; FLUORESCENCE; NEUTROPHILS; PROTEINS AB The acridine dyes acridine orange (AO) and coriphosphine O (CPO) and ethidium bromide (EtBr) were used to stain bacterial digests after electrophoresis in native and denaturing (SDS) polyacrylamide gels and were shown to stain DNA and RNA preferentially over other subcellular components in the gels. Vegetative cell digests of Bacillus subtilis, Escherichia coli, Micrococcus luteus, and Staphylococcus aureus showed intense staining of DNA with AO and CPO near the top of the gel, but little or no staining of other cellular constituents. EtBr stained both DNA and RNA in the gels. Protein standards and non-nucleic acid cellular constituents stained faintly with high concentrations [greater than or equal to 100 mu M] of AO, lower concentrations (13.9 mu M) of CPO, and did not stain with 0.5 mu g/ml EtBr in denaturing gels. The complete set of cellular biochemicals was visualized by silver staining, while the protein subset was detected by Coomassie blue staining. The highest concentrations of AO (120 mu M) and CPO (13.9 mu M) were shown to detect purified DNA in gels with a sensitivity in the range of 25-50 ng per band. This work demonstrates the specificity of acridine and ethidium dyes for nucleic acids, while illustrating the level of non-nucleic acid-specific interactions with other cellular components by staining of electrophoretically separated cellular components in a gel matrix. C1 SCI & TECHNOL CORP, EDGEWOOD, MD 21040 USA. USA, EDGEWOOD RES DEV & ENGN CTR, SCBRD, RTE, ABERDEEN PROVING GROUND, MD 21010 USA. RP APPL RES ASSOCIATES, ARMSTRONG LAB,ENVIRON DIRECTORATE,139 BARNES DR, SUITE 2, BLDG 1117, TYNDALL AFB, FL 32403 USA. NR 25 TC 7 Z9 7 U1 0 U2 4 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA SN 1052-0295 EI 1473-7760 J9 BIOTECH HISTOCHEM JI Biotech. Histochem. PD MAY PY 1996 VL 71 IS 3 BP 130 EP 136 DI 10.3109/10520299609117149 PG 7 WC Biotechnology & Applied Microbiology; Cell Biology SC Biotechnology & Applied Microbiology; Cell Biology GA UL575 UT WOS:A1996UL57500005 PM 8724438 ER PT J AU Raybon, KB Snyder, MJ Halvorson, RD AF Raybon, KB Snyder, MJ Halvorson, RD TI Hemolytic uremic syndrome after autologous BMT without TBI SO BONE MARROW TRANSPLANTATION LA English DT Letter ID BONE-MARROW TRANSPLANTATION RP Raybon, KB (reprint author), WILFORD HALL USAF MED CTR,PSMH 2200 BERGQUIST DR,STE 1,LACKLAND AFB,TX 78236, USA. NR 6 TC 4 Z9 4 U1 0 U2 0 PU STOCKTON PRESS PI BASINGSTOKE PA HOUNDMILLS, BASINGSTOKE, HAMPSHIRE, ENGLAND RG21 6XS SN 0268-3369 J9 BONE MARROW TRANSPL JI Bone Marrow Transplant. PD MAY PY 1996 VL 17 IS 5 BP 897 EP 898 PG 2 WC Biophysics; Oncology; Hematology; Immunology; Transplantation SC Biophysics; Oncology; Hematology; Immunology; Transplantation GA UK314 UT WOS:A1996UK31400040 PM 8733719 ER PT J AU Thompson, CR Gerstman, BS Jacques, SL Rogers, ME AF Thompson, CR Gerstman, BS Jacques, SL Rogers, ME TI Melanin granule model for laser-induced thermal damage in the retina SO BULLETIN OF MATHEMATICAL BIOLOGY LA English DT Article ID INJURY; TISSUE AB An analytical model for thermal damage of retinal tissue due to absorption of laser energy by finite-sized melanin granules is developed. Since melanin is the primary absorber of visible and near-IR light in the skin and in the retina, bulk heating of tissue can be determined by superposition of individual melanin granule effects. Granules are modeled as absorbing spheres surrounded by an infinite medium of water. Analytical solutions to the heat equation result in computations that are quick and accurate. Moreover, the model does not rely on symmetric beam profiles, and so arbitrary images can be studied. The important contribution of this model is to provide a more accurate biological description of submillisecond pulse exposures than previous retinal models, while achieving agreement for longer pulses. This model can also be naturally extended into the sub-microsecond domain by including vaporization as a damage mechanism. It therefore represents the beginning of a model which can be applied across the entire pulse duration domain. C1 FLORIDA INT UNIV,DEPT PHYS,MIAMI,FL 33199. UNIV TEXAS,MD ANDERSON CANC CTR,LASER BIOL RES LAB,HOUSTON,TX 77030. RP Thompson, CR (reprint author), ARMSTRONG LAB,OPT RADIAT DIV,BROOKS AFB,TX 78235, USA. NR 46 TC 74 Z9 79 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0092-8240 J9 B MATH BIOL JI Bull. Math. Biol. PD MAY PY 1996 VL 58 IS 3 BP 513 EP 553 DI 10.1007/BF02460595 PG 41 WC Biology; Mathematical & Computational Biology SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology GA UN903 UT WOS:A1996UN90300006 PM 8688838 ER PT J AU Feigenbaum, EA AF Feigenbaum, EA TI How the ''what'' becomes the ''how'' SO COMMUNICATIONS OF THE ACM LA English DT Article C1 USAF,WASHINGTON,DC 20330. RP Feigenbaum, EA (reprint author), STANFORD UNIV,DEPT COMP SCI,GATES HALL,STANFORD,CA 94305, USA. NR 14 TC 6 Z9 6 U1 0 U2 0 PU ASSOC COMPUTING MACHINERY PI NEW YORK PA 1515 BROADWAY, NEW YORK, NY 10036 SN 0001-0782 J9 COMMUN ACM JI Commun. ACM PD MAY PY 1996 VL 39 IS 5 BP 97 EP 104 DI 10.1145/229459.229471 PG 8 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA UG872 UT WOS:A1996UG87200017 ER PT J AU Stech, D AF Stech, D TI Special issue - Stability of composite structures - Foreword SO COMPOSITE STRUCTURES LA English DT Editorial Material RP Stech, D (reprint author), USAF,EUROPEAN OFF AEROSP RES & DEV,WASHINGTON,DC 20330, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0263-8223 J9 COMPOS STRUCT JI Compos. Struct. PD MAY PY 1996 VL 35 IS 1 BP 3 EP 3 DI 10.1016/0263-8223(96)00019-0 PG 1 WC Materials Science, Composites SC Materials Science GA UZ650 UT WOS:A1996UZ65000002 ER PT J AU Wang, SH Zachery, R AF Wang, SH Zachery, R TI Singular value decomposition of system input-output matrix and its symmetry property SO COMPUTERS & ELECTRICAL ENGINEERING LA English DT Article DE singular value decomposition; linear systems; functional reproducibility AB In this paper, we apply the singular value decomposition to the input-output matrix of a linear discrete time system. This approach provides a geometrical interpretation of the reachable subspace of the system output. For the time-invariant case, we have proven certain symmetry property between the singular vectors of the system input-output matrix. Copyright (C) 1996 Elsevier Science Ltd C1 USAF,ARMAMENT DIRECTORATE,NAVIGAT & CONTROL BRANCH,EGLIN AFB,FL. RP Wang, SH (reprint author), UNIV CALIF DAVIS,DEPT ELECT & COMP ENGN,DAVIS,CA 95616, USA. NR 3 TC 4 Z9 4 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0045-7906 J9 COMPUT ELECTR ENG JI Comput. Electr. Eng. PD MAY PY 1996 VL 22 IS 3 BP 231 EP 234 DI 10.1016/0045-7906(96)00007-9 PG 4 WC Computer Science, Hardware & Architecture; Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic SC Computer Science; Engineering GA UZ785 UT WOS:A1996UZ78500004 ER PT J AU delaBarre, CM Kaula, WM Varadi, F AF delaBarre, CM Kaula, WM Varadi, F TI A study of orbits near Saturn's triangular Lagrangian points SO ICARUS LA English DT Article AB We revisit the question whether orbits near Saturn's triangular Lagrangian points (L4 and L5) may be stable for the age of the Solar System, In this paper, asteroids potentially on these orbits are named ''Bruins'' for short. We numerically integrated orbits around the L4 and L5 Lagrangian paints of Jupiter (Trojans) and Saturn: 40 Trojans and 350 Bruins, all of inclination less than 12 degrees, Trojan orbits were numerically integrated along with Bruin orbits, so that by comparing the results, we might better understand Bruin orbital dynamics, Four Bruins were stable when the numerical integration was stopped at 412 Myrs. Properties of these stable orbits were: (1) proper eccentricities less than 0.028; (2) longitudes of perihelion that librate about a point 45 degrees from Saturn's perihelion, such that the perihelia are never close when the Bruin's eccentricity is near maximum; (3) maximum eccentricities that do not occur when perihelia are near Jupiter's aphelion or when Jupiter is near its maximum eccentricity; and (4) libration angle about L4 or L5 of more than 80 degrees (a measure of tadpole length), Orbits with libration angles less than 80 degrees were unstable, the time to instability being correlated with libration angle, In contrast, long-lived Trojans may have very small tadpole orbits and longitudes of perihelion that either circulate or librate with respect to Jupiter's. We numerically integrated various Bruin orbits using different Solar System models to develop a Hamiltonian perturbation theory for low-inclination Bruin orbits, Although only at the beginning stages of development, the theory already identifies three separatrices of Bruin motion due in part to the Great Inequality (GI) between Jupiter and Saturn, These GI separatrices are a major contributor to the unstable region near Saturn's L4 and L5 points. We found a secular resonance between the perihelion precession rates of Saturn and a Bruin in the elliptic, restricted problem of three bodies with imposed motion of Saturn's perihelion, This resonance creates a separatrix of Bruin motion, which may cause low-inclination Bruins with circulating longitudes of perihelion to go unstable when Jupiter is added to the model. Although we still cannot say whether all Bruin orbits eventually go unstable, we can predict candidate stable orbits based on this work. (C) 1996 Academic Press, Inc. C1 UNIV CALIF LOS ANGELES, DEPT EARTH & SPACE SCI, LOS ANGELES, CA 90024 USA. UNIV CALIF LOS ANGELES, INST GEOPHYS & PLANETARY PHYS, LOS ANGELES, CA 90024 USA. RP delaBarre, CM (reprint author), USAF ACAD, DEPT ASTRONAUT, COLORADO SPRINGS, CO 80840 USA. NR 18 TC 24 Z9 24 U1 2 U2 5 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0019-1035 J9 ICARUS JI Icarus PD MAY PY 1996 VL 121 IS 1 BP 88 EP 113 DI 10.1006/icar.1996.0073 PG 26 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA UP055 UT WOS:A1996UP05500007 ER PT J AU Stytz, MR AF Stytz, MR TI Distributed virtual environments SO IEEE COMPUTER GRAPHICS AND APPLICATIONS LA English DT Article RP Stytz, MR (reprint author), USAF,INST TECHNOL,WRIGHT PATTERSON AFB,OH 45433, USA. NR 16 TC 54 Z9 68 U1 0 U2 0 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 SN 0272-1716 J9 IEEE COMPUT GRAPH JI IEEE Comput. Graph. Appl. PD MAY PY 1996 VL 16 IS 3 BP 19 EP 31 DI 10.1109/38.491182 PG 13 WC Computer Science, Software Engineering SC Computer Science GA UG099 UT WOS:A1996UG09900007 ER PT J AU Liby, BW Statman, D AF Liby, BW Statman, D TI Controlling the linewidth of a semiconductor laser with photorefractive phase conjugate feedback SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article ID EXTERNAL OPTICAL FEEDBACK; INJECTION-LASER; MIRROR AB A novel technique for narrowing the linewidth of a single laser diode using photorefractive phase conjugate feedback is presented. The behavior of this system can be modeled by adapting the previously developed theory to include the phase constraints of the phase conjugate external cavity, The experiments show excellent agreement with the model, This technique produces a stable, narrow linewidth in a semiconductor laser. The comparison to the conventional case is discussed. C1 USAF,PHILLIPS LAB,PL LIDA,KIRTLAND AFB,NM 87117. ALLEGHENY COLL,DEPT PHYS,MEADVILLE,PA 16335. ALLEGHENY COLL,DEPT CHEM,MEADVILLE,PA 16335. NR 9 TC 16 Z9 16 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9197 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD MAY PY 1996 VL 32 IS 5 BP 835 EP 838 DI 10.1109/3.493008 PG 4 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA UJ899 UT WOS:A1996UJ89900014 ER PT J AU OHair, JR Suter, BW AF OHair, JR Suter, BW TI The Zak transform and decimated time-frequency distributions SO IEEE TRANSACTIONS ON SIGNAL PROCESSING LA English DT Article ID SIGNALS AB In this paper, the interrelation between the Zak transform and the generalized discrete time-frequency distribution (GDTFD) is examined, Starting with the discrete Zak transform, its definition is broadened to include arbitrary windows creating the windowed Zak transform (WZT). The WZT is then combined with the spectrogram. It is demonstrated that the spectrogram based upon the WZT, called the Zak spectrogram (ZS), is a generalization of the standard spectrogram. Next, building upon the idea of the weighted spectrogram, the weighted ZS is used to produce a new class of GDTFD, called the decimated GDTFD (D-GDTFD), The decimated GDTFD is similar to the GDTFD, except it trades bandwidth for computational speed and requires significantly less storage in order to be implemented, The reduction in discrete bandwidth is from 2 pi for the GDTFD to 2 pi/m for the D-GDTFD, An important attribute of the D-GDTFD Is that it requires significantly less storage than the GDTFD. The D-GDTFD requires only 1/m(2) of the storage of the GDTFD. An example using the binomial distribution is given to illustrate the connection between the D-GDTFD and the GDTFD, Throughout the paper, examples of multirate systems are given, which could be used to implement the building blocks of the D-GDTFD, This makes the D-GDTFD practical to implement using slower and less expensive elements. C1 USAF,INST TECHNOL,AFIT,ENG,WRIGHT PATTERSON AFB,OH 45433. RP OHair, JR (reprint author), USAF,PHILLIPS LAB,PL,LIMI,ALBUQUERQUE,NM 87117, USA. NR 25 TC 7 Z9 7 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1053-587X J9 IEEE T SIGNAL PROCES JI IEEE Trans. Signal Process. PD MAY PY 1996 VL 44 IS 5 BP 1099 EP 1110 DI 10.1109/78.502324 PG 12 WC Engineering, Electrical & Electronic SC Engineering GA UN484 UT WOS:A1996UN48400006 ER PT J AU DeSimio, MP Anderson, TR Westerkamp, JJ AF DeSimio, MP Anderson, TR Westerkamp, JJ TI Phoneme recognition with a model of binaural hearing SO IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING LA English DT Article ID HEADPHONE SIMULATION; COCHLEA AB This work presents a method for phoneme recognition based on a model of the human binaural auditory system. Performance of the binaural system is compared to that of an equivalent monaural system across a range of signal-to-noise ratios (SNR's) and simulated azimuth separations of speech and noise sources. Comparison of binaural and monaural phoneme recognition accuracy for both speech and noise at 0 degrees suggests an effective increase in SNR of 5 dB for the binaural system. Experiments are also conducted to investigate binaural system performance for speech and noise at differing azimuth angles. Two binaural speech and noise conditions are considered: i) speech from 0 degrees plus noise from 0 degrees; and ii) speech from 0 degrees plus noise from 90 degrees. A comparison of relative performance differences for each binaural system with the monaural system shows the greatest increase in phoneme recognition accuracy when the speech and noise are simulated using different azinuth angles (0 degrees speech plus noise from 90 degrees). RP DeSimio, MP (reprint author), USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433, USA. NR 23 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1063-6676 J9 IEEE T SPEECH AUDI P JI IEEE Trans. Speech Audio Process. PD MAY PY 1996 VL 4 IS 3 BP 157 EP 166 DI 10.1109/89.496213 PG 10 WC Acoustics; Engineering, Electrical & Electronic SC Acoustics; Engineering GA UM122 UT WOS:A1996UM12200001 ER PT J AU Schwartz, RS Hensley, DH Bradley, DV AF Schwartz, RS Hensley, DH Bradley, DV TI Immersion disinfection of irreversible hydrocolloid impressions in pH-adjusted sodium hypochlorite .1. Microbiology SO INTERNATIONAL JOURNAL OF PROSTHODONTICS LA English DT Article ID DIMENSIONAL STABILITY; HEPATITIS-B; INACTIVATION; VIRUS; CHLORINE; ACCURACY AB Sodium hypochlorite is one of the disinfectants recommended for impressions, usually in a 1:10 dilution to minimize the negative effects on the impression material and poured gypsum cast. Dilution causes a loss of antimicrobial properties, however. Sodium hypochlorite is known to have enhanced antimicrobial properties at lower pH levels. This study evaluated the antimicrobial activity of sodium hypochlorite at progressively lower pH levels. A metal model of a denial arch was contaminated, and irreversible hydrocolloid impressions were made, cultured, disinfected (by immersion), and cultured again. Predisinfection and postdisinfection bacterial counts were compared. It was found that a 10-minute immersion in solutions reduced to pHs 7 to 11 consistently produced a 4-log (99.99%) or greater reduction in viable organisms. A pH of 10 was the only level that was consistently effective at decreased immersion times. It was effective in times of 3 minutes or greater. C1 WILFORD HALL USAF MED CTR,CLIN INVEST DIRECTORATE,LACKLAND AFB,TX 78236. DIV SCI LAB,CLIN INVEST DIRECTORATE,LACKLAND AFB,TX. RP Schwartz, RS (reprint author), UNIV TEXAS,HLTH SCI CTR,DEPT GEN DENT,7703 FLOYD CURL DR,SAN ANTONIO,TX 78284, USA. NR 45 TC 6 Z9 7 U1 0 U2 1 PU QUINTESSENCE PUBL CO INC PI CAROL STREAM PA 551 KIMBERLY DR, CAROL STREAM, IL 60188-1881 SN 0893-2174 J9 INT J PROSTHODONT JI Int. J. Prosthodont. PD MAY-JUN PY 1996 VL 9 IS 3 BP 217 EP 222 PG 6 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA UN036 UT WOS:A1996UN03600002 PM 8957855 ER PT J AU Hutchings, ML Vandewalle, KS Schwartz, RS Charlton, DG AF Hutchings, ML Vandewalle, KS Schwartz, RS Charlton, DG TI Immersion disinfection of irreversible hydrocolloid impressions in pH-adjusted sodium hypochlorite .2. Effect on gypsum casts SO INTERNATIONAL JOURNAL OF PROSTHODONTICS LA English DT Article ID DIMENSIONAL STABILITY; DENTAL IMPRESSIONS; INACTIVATION; CONTAMINATION; ORGANISMS; CHLORINE; VIRUSES AB Lowering the pH of sodium hypochlorite has been shown to greatly improve its efficacy as a disinfectant for irreversible hydrocolloid. This study evaluated the surface roughness and detail reproduction of gypsum casts recovered from impressions disinfected with sodium hypochlorite at altered pH levels. The experimental disinfectants were sodium hypochlorite 0.525% (10-minute immersion) at pH 11.5 (unaltered), pH 10, and pH 8. An additional group was tested at pH 10 for 5 minutes. There was a trend toward increased surface roughness as the pH was lowered, but a 5-minute immersion of impressions in sodium hypochlorite at pH 10 produced casts of equivalent surface roughness to impressions rinsed in water and poured immediately. The test for surface detail reproduction produced similar results. C1 UNIV TEXAS,HLTH SCI CTR,DEPT GEN DENT,SAN ANTONIO,TX 78284. WILFORD HALL USAF MED CTR,DEPT GEN DENT,LACKLAND AFB,TX 78236. DENT INVEST SERV,MAT EVALUAT SECT,BROOKS AFB,TX. NR 52 TC 7 Z9 7 U1 0 U2 1 PU QUINTESSENCE PUBL CO INC PI CAROL STREAM PA 551 KIMBERLY DR, CAROL STREAM, IL 60188-1881 SN 0893-2174 J9 INT J PROSTHODONT JI Int. J. Prosthodont. PD MAY-JUN PY 1996 VL 9 IS 3 BP 223 EP 229 PG 7 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA UN036 UT WOS:A1996UN03600003 PM 8957856 ER PT J AU Evan, DB AF Evan, DB TI A castable glass-ceramic pontic for the partial veneer fixed partial denture SO INTERNATIONAL JOURNAL OF PROSTHODONTICS LA English DT Article AB A technique is presented for fabricating an esthetic, cast glass-ceramic pontic for the partial veneer-retained fixed partial denture. After the framework is waxed to full contour, the pontic is sectioned from the remainder of the wax pattern and cut back on the occlusal, proximal, and lingual aspects. A cast glass-ceramic pontic is then fabricated. The pontic is returned to the master cast to complete the wax pattern for the type IV gold fixed partial denture superstructure. The pontic is fitted and then luted to the gold framework using an adhesive resin cement. The lost wax technique ensures a pontic with precise, anatomic form that restores proper contours and relationships. Additionally, this esthetic and durable pontic for partial veneer fixed partial dentures encourages conservative tooth preparation and promotes restorative materials that minimize wear of the opposing dentition. C1 USAF,DENT CORP,WASHINGTON,DC 20330. RP Evan, DB (reprint author), UNIV MICHIGAN,SCH DENT,DEPT BIOL & MAT SCI,1011 N UNIV,ANN ARBOR,MI 48109, USA. NR 19 TC 0 Z9 0 U1 0 U2 0 PU QUINTESSENCE PUBL CO INC PI CAROL STREAM PA 551 KIMBERLY DR, CAROL STREAM, IL 60188-1881 SN 0893-2174 J9 INT J PROSTHODONT JI Int. J. Prosthodont. PD MAY-JUN PY 1996 VL 9 IS 3 BP 248 EP 253 PG 6 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA UN036 UT WOS:A1996UN03600006 PM 8957859 ER PT J AU Trujillo, JR Navia, BA Worth, T Lucey, DR McLane, MF Lee, TH Essex, M AF Trujillo, JR Navia, BA Worth, T Lucey, DR McLane, MF Lee, TH Essex, M TI High levels of anti-HIV-1 envelope antibodies in cerebrospinal fluid as compared to serum from patients with AIDS dementia complex SO JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES AND HUMAN RETROVIROLOGY LA English DT Article DE AIDS dementia complex; cerebrospinal fluid; HIV-1 gp120 antibodies ID CENTRAL-NERVOUS-SYSTEM; IMMUNODEFICIENCY VIRUS-INFECTION; BRAIN-BARRIER SYNTHESIS; HIV-1 INFECTION; HTLV-III; INTRATHECAL SYNTHESIS; V3 LOOP; ENCEPHALOPATHY; NEOPTERIN; PROTEIN AB The antibody response to the HIV-I envelope protein has not been well characterized in patients with AIDS dementia complex (ADC). We evaluated the frequency of antibodies against the HIV-1 envelope in cerebrospinal fluid (CSF) and serum from 21 persons with ADC and 10 symptom-free HIV-1-positive subjects using Western immunoblot with reducing and nonreducing buffer and radioimmunoprecipitation (RIP) analysis. RIP analysis revealed anti-envelope antibodies in all sera tested. Higher anti-envelope levels were observed in CSF than in serum of 12 of 21 ADC patients and only 1 of 10 symptom-free subjects (two-sided Fisher exact test, p < 0.05). All persons with moderate to severe ADC had higher anti-envelope levels in CSF than in sera (p < 0.005). CSF anti-gp120 antibodies were not as readily detected by Western blot analysis even under nonreduced conditions, suggesting that they are directed to conformational epitopes. Higher CSF anti-envelope antibodies appear to be more common in patients with ADC than in symptom-free HIV-1-positive subjects. This antibody pattern may serve as a marker for ADC and its progression. C1 HARVARD UNIV,SCH PUBL HLTH,DEPT CANC BIOL,BOSTON,MA 02115. MASSACHUSETTS GEN HOSP,DEPT NEUROL,BOSTON,MA 02114. MASSACHUSETTS GEN HOSP,DEPT PSYCHIAT,BOSTON,MA 02114. WILFORD HALL USAF MED CTR,SAN ANTONIO,TX. FU NCI NIH HHS [CA09382, CA39805]; NHLBI NIH HHS [HL33774] NR 50 TC 6 Z9 7 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 1077-9450 J9 J ACQ IMMUN DEF SYND JI J. Acquir. Immune Defic. Syndr. Hum. Retrovirol. PD MAY 1 PY 1996 VL 12 IS 1 BP 19 EP 25 PG 7 WC Immunology; Infectious Diseases SC Immunology; Infectious Diseases GA UK146 UT WOS:A1996UK14600003 PM 8624756 ER PT J AU Iwanski, KP ORourke, MJ AF Iwanski, KP ORourke, MJ TI F-15 forebody vortex flow control using jet nozzle blowing SO JOURNAL OF AIRCRAFT LA English DT Article AB A low-speed wind-tunnel test was conducted to determine the lateral-directional control effectiveness of a forebody jet nozzle blowing on a 10% scale F-15E model. This investigation of pneumatic forebody vortex dow control was the first of its kind performed on an F-15 configuration. The test acquired six-component force balance data in the NASA Langley 30- by 60-Foot Tunnel at a freestream dynamic pressure of 8 psf at an equivalent Reynolds number per foot of approximately 5.08 x 10(5). Asymmetric forebody jet blowing was effective in generating yawing moments through an angle of attack (AOA) range that extends beyond the limit of rudder control power. The optimum nozzle configurations were pointed outward, and yawing moments generated within the maneuver range of AOA (alpha < 40 deg) increased with increases in both blowing rate and AOA. Above 10-deg AOA, blowing rates of C-mu = 0.010 and greater resulted in yawing moments that approached or exceeded that developed by full rudder deflection. RP Iwanski, KP (reprint author), USAF,WRIGHT LAB,FLIGHT DYNAM DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 6 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 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD MAY-JUN PY 1996 VL 33 IS 3 BP 491 EP 498 DI 10.2514/3.46971 PG 8 WC Engineering, Aerospace SC Engineering GA UP198 UT WOS:A1996UP19800006 ER PT J AU Sheu, S Liou, JJ Huang, CI Williamson, DC AF Sheu, S Liou, JJ Huang, CI Williamson, DC TI Modeling the post-burn-in abnormal base current in AlGaAs/GaAs heterojunction bipolar transistors SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID RECOMBINATION AB The base current of AlGaAs/GaAs heterojunction bipolar transistor subjected to a long burn-in test often exhibits an abnormal characteristic with an ideality factor of about 3, rather than a normal ideality factor between 1 and 2, in the midvoltage range, We develope an analytical model to investigate the physical mechanisms underlying such a characteristic. Consistent with the finding of an experimental work reported recently, our model calculations show that the recombination current in the base has an ideality factor of about 3 in the midvoltage range and that such a current is responsible for the observed abnormal base current in heterojunction bipolar transistor after a long burn-in test. Post-burn-in data measured from two different heterojunction bipolar transistors are also included in support of the model. (C) 1996 American Institute of Physics. C1 USAF, WRIGHT LAB, DEVICE TECHNOL DIV, WRIGHT PATTERSON AFB, OH 45433 USA. ROME LAB, ELECTROMAGNET & RELIABIL DIRECTORATE, GRIFFISS AFB, NY 13422 USA. RP Sheu, S (reprint author), UNIV CENT FLORIDA, DEPT ELECT & COMP ENGN, ORLANDO, FL 32816 USA. NR 10 TC 6 Z9 6 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 1 PY 1996 VL 79 IS 9 BP 7348 EP 7352 DI 10.1063/1.361451 PG 5 WC Physics, Applied SC Physics GA UJ084 UT WOS:A1996UJ08400099 ER PT J AU Cooper, JR Caldwell, DJ AF Cooper, JR Caldwell, DJ TI Teratologic evaluation of liquid propellant (XM46) in the rat SO JOURNAL OF APPLIED TOXICOLOGY LA English DT Article DE teratology; rat; propellant; XM46 AB The Army has proposed using a liquid propellant (XM46) composed of hydroxylammonium nitrate (HAN) and triethanolammonium nitrate (TEAN) in its Advanced Field Artillery System, This study was undertaken to determine the potential threat to the unborn fetus should female Army personnel become exposed to this compound during pregnancy, Timed pregnant rats (Crl:CD(R) Charles River Laboratories, Inc.) were purchased on day 4 of pregnancy and divided into a control and four dose groups of 25-28 animals each, Animals were dosed orally with XM46 on days 6-15 of pregnancy at the rate of 0.0, 162.5, 325 and 650 mg kg(-1) body wt day(-1), Cesarean section was performed on gestation day 20. Maternal body weight was significantly reduced in the 650 mg kg(-1) day(-1) dose group on days 5-20 of pregnancy, Likewise, maternal food consumption was significantly reduced in the high-dose animals during the dosing period. There were no exposure-related differences in fetal weight, number, sex or frequency of malformations observed in fetuses between control and treated dams, The results of this study indicate that XM46 is not a teratogen in the rat. C1 USA,OCCUPAT HLTH RES DETACHMENT,WRIGHT PATTERSON AFB,OH 45433. RP Cooper, JR (reprint author), ARMSTRONG LAB,COMPARAT MED BRANCH,WRIGHT PATTERSON AFB,OH 45433, USA. NR 17 TC 1 Z9 2 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0260-437X J9 J APPL TOXICOL JI J. Appl. Toxicol. PD MAY-JUN PY 1996 VL 16 IS 3 BP 277 EP 280 PG 4 WC Toxicology SC Toxicology GA UW503 UT WOS:A1996UW50300015 PM 8818871 ER PT J AU Sempowski, GD Derdak, S Phipps, RP AF Sempowski, GD Derdak, S Phipps, RP TI Interleukin-4 and interferon-gamma discordantly regulate collagen biosynthesis by functionally distinct lung fibroblast subsets SO JOURNAL OF CELLULAR PHYSIOLOGY LA English DT Article ID BRONCHOALVEOLAR LAVAGE FLUID; PULMONARY FIBROSIS; HYBRIDIZATION; EXPRESSION; BLEOMYCIN; TISSUE AB Pulmonary fibrosis is a potentially fatal consequence of treatments for malignancy and is an increasing problem in bone marrow transplant patients and in cases of allogeneic lung transplant. The fibrotic response is characterized by increases in lung fibroblast number and collagen synthesis. This laboratory previously isolated stable, functionally distinct, murine lung fibroblast subsets (Thy-(1+) and Thy-1(-)) to study the contribution of fibroblast subpopulations in lung fibrosis. The fibroblast fibrotic response may be induced by cytokines secreted by infiltrating cells such as T lymphocytes and mast cells. In the current study two key regulatory cytokines, interferon-gamma (IFN-gamma) and interleukin-4 (IL-4), were investigated for their effects on the collagen synthesis of murine lung fibroblast subsets. IL-4 and IFN-gamma are putatively characterized as fibrogenic and anti-fibrogenic cytokines, respectively, and are found in repairing lung tissue. Stimulation with recombinant IL-4 induced a 100% increase in total collagen production only by Thy-1(+) fibroblasts. Types I and III collagen mRNA were increased in the Thy-1(+) fibroblasts, unlike the Thy-1(-) subset. In contrast, IFN-gamma decreased constitutive collagen production by more than 50% in Thy-1(+) and Thy-1(-) fibroblasts. Interestingly, the two subsets utilized their collagen production machinery (collagenase, tissue inhibitors of metalloproteinases) differently to further regulate collagen turnover in response to IL-4 and IFN-gamma. Overall, our data support the hypothesis that IL-4 is fibrogenic and IFN-gamma is anti-fibrogenic. Moreover, selective expansion of IL-4 responsive fibroblasts (e.g., Thy-1(+)) may be important in the transition from repair to chronic fibrosis. In addition, these data suggest that an inflammatory response dominated by IL-4-producing Th-2 lymphocytes and/or mast cells will promote fibrosis development. (C) 1996 Wiley-Liss, Inc. C1 UNIV ROCHESTER, CTR CANC, SCH MED & DENT, ROCHESTER, NY 14642 USA. UNIV ROCHESTER, DEPT MICROBIOL & IMMUNOL, SCH MED & DENT, ROCHESTER, NY 14642 USA. UNIV ROCHESTER, DEPT PEDIAT, SCH MED & DENT, ROCHESTER, NY 14642 USA. UNIV ROCHESTER, DEPT ENVIRONM MED, SCH MED & DENT, ROCHESTER, NY 14642 USA. USAF, MED CTR, LACKLAND AFB, TX 78236 USA. FU NCI NIH HHS [CA55305, CA11198]; NIDCR NIH HHS [DE11390] NR 31 TC 110 Z9 116 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0021-9541 J9 J CELL PHYSIOL JI J. Cell. Physiol. PD MAY PY 1996 VL 167 IS 2 BP 290 EP 296 DI 10.1002/(SICI)1097-4652(199605)167:2<290::AID-JCP13>3.0.CO;2-C PG 7 WC Cell Biology; Physiology SC Cell Biology; Physiology GA UG060 UT WOS:A1996UG06000013 PM 8613470 ER PT J AU Karna, SP AF Karna, SP TI Spin-unrestricted time-dependent Hartree-Fock theory of frequency-dependent linear and nonlinear optical properties SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID STATIC DIPOLE POLARIZABILITIES; LEVEL-CORRELATED CALCULATIONS; MOLECULAR ELECTRIC PROPERTIES; CARTESIAN GAUSSIAN FUNCTIONS; POLARIZED BASIS-SETS; FIRST-ROW ATOMS; PERTURBATION-THEORY; RELATIVISTIC INTEGRALS; ENERGY DERIVATIVES; RESPONSE THEORY AB A self-consistent time-dependent unrestricted Hartree-Fock (TDUHF) theory of linear and nonlinear optical properties is presented. Expressions are derived to calculate the elements of the linear polarizability tensor alpha, the first-hyperpolarizability tensor beta, and the second-hyperpolarizability tensor gamma, in terms of spin-adapted perturbed density matrices. For the hyperpolarizability tensors, beta and gamma, expressions are also derived from the lower-order solutions to the TDUHF equations. A novel feature of the present formulation is that it automatically allows for the separation of the contributions to (hyper)polarizability tensors from individual spin. Results obtained from the calculations of alpha(omega(sigma);alpha(a)) for H, C, N, O, F, Si, P, S, Cl, O-2, NO, and OH and of beta(-omega(sigma);omega(a),omega(b)) corresponding to various second-order nonlinear optical processes for NO and OH radicals are presented. The present results for alpha show excellent agreement with the literature data. The calculated result for beta(parallel to) in the case of the NO radical is too small and has a different sign in comparison to the published experimental data. For both NO and OH, the beta tensor for different second-order nonlinear optical processes show the order: beta(-2 omega;omega,omega)>beta(-omega;0,omega) =beta(0;omega,-omega)>beta(0;0,0). (C) 1996 American Institute of Physics. C1 USAF ACAD, FRANK J SEILER RES LAB, COLORADO SPRINGS, CO 80840 USA. NR 56 TC 33 Z9 33 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 1 PY 1996 VL 104 IS 17 BP 6590 EP 6605 DI 10.1063/1.471765 PG 16 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA UG680 UT WOS:A1996UG68000020 ER PT J AU Conlan, MJ Rapley, JW Cobb, CM AF Conlan, MJ Rapley, JW Cobb, CM TI Biostimulation of wound healing by low-energy laser irradiation - A review SO JOURNAL OF CLINICAL PERIODONTOLOGY LA English DT Article DE biostimulation; low-energy laser; wound healing; cell proliferation; collagen synthesis ID HELIUM-NEON LASER; RADIATION; INVITRO AB This paper reviews studies on the basic principles of biostimulation of wound healing by various low-energy lasers. It looks at the mechanism of action of biostimulation as well as the laser's effect on eel proliferation, collagen synthesis, and would healing. C1 USAF,DEPT PERIODONT,MAXWELL AFB,AL 36113. UNIV MISSOURI,SCH DENT,DEPT GRAD PERIODONT,KANSAS CITY,MO 64108. UNIV MISSOURI,SCH DENT,DEPT PERIODONT,KANSAS CITY,MO 64108. NR 36 TC 280 Z9 288 U1 4 U2 19 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0303-6979 J9 J CLIN PERIODONTOL JI J. Clin. Periodontol. PD MAY PY 1996 VL 23 IS 5 BP 492 EP 496 DI 10.1111/j.1600-051X.1996.tb00580.x PG 5 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA UP199 UT WOS:A1996UP19900013 PM 8783057 ER PT J AU Shang, JS Fithen, RM AF Shang, JS Fithen, RM TI A comparative study of characteristic-based algorithms for the Maxwell equations SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID DIFFERENCE AB Characteristic-based finite-difference and finite-volume schemes have been developed for solving the three-dimensional Maxwell equations in the time domain. A detailed eigenvector analysis for the Maxwell equations in a general curvilinear coordinate has also been completed to provide a basic framework for future finite-difference schemes. Although the basic concepts of the two algorithms are identical, the detailed formulations are vastly different for achieving split flux vectors according to the sign of the eigenvalues. A comparative study of these algorithms applied to an oscillating electric dipole is carried out to assess their relative merit for further development. In spherical coordinates, second-order windward numerical simulations of the radiating phenomenon are closely comparable in terms of accuracy and efficiency. These methods also demonstrate an ability to suppress reflected waves from the truncated boundary by a simple compatibility condition. (C) 1996 Academic Press, Inc. RP Shang, JS (reprint author), USAF,WRIGHT LAB,FLIGHT DYNAM DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 28 TC 26 Z9 26 U1 0 U2 5 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD MAY PY 1996 VL 125 IS 2 BP 378 EP 394 DI 10.1006/jcph.1996.0100 PG 17 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA UJ965 UT WOS:A1996UJ96500007 ER PT J AU Mitchel, WC Roth, M Evwaraye, AO Yu, PW Smith, SR AF Mitchel, WC Roth, M Evwaraye, AO Yu, PW Smith, SR TI Electronic properties of boron in p-type bulk 6H-SiC SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article; Proceedings Paper CT Electronic Materials Conference CY JUN 21-23, 1995 CL CHARLOTTESVILLE, VA DE admittance spectroscopy; boron; SiC ID SPECTROSCOPY AB The electronic properties of boron in bulk 6H-SiC have been studied by temperature dependent Hall effect, thermal admittance spectroscopy, and optical absorption. A single acceptor level located between 0.27 and 0.35 eV above the valence band is associated with boron on a silicon lattice site. The deep nature of this acceptor level prevents complete thermal activation of the level at room temperature and thus carrier concentration measurements at this temperature will not give the total boron concentration. A spread in the measured activation energy for boron is reported. Measurement of optical absorption is suggested as a nondestructive measure of boron concentration. No evidence for the D-center was observed in this material. C1 UNIV DAYTON,RES INST,DAYTON,OH 45469. RP Mitchel, WC (reprint author), MLPO,WRIGHT LAB,MAT DIRECTORATE,3005 P ST,STE 6,WRIGHT PATTERSON AFB,OH 45433, USA. NR 16 TC 15 Z9 15 U1 0 U2 3 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD MAY PY 1996 VL 25 IS 5 BP 863 EP 867 DI 10.1007/BF02666650 PG 5 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA UJ099 UT WOS:A1996UJ09900016 ER PT J AU Huynh, MT Pollack, RA Cunningham, RAJ AF Huynh, MT Pollack, RA Cunningham, RAJ TI Universal newborn hearing screening: Feasibility in a community hospital SO JOURNAL OF FAMILY PRACTICE LA English DT Article DE hearing tests, hearing loss, sensorineural; hearing loss, conductive; infant, newborn; transient evoked otoacoustic emissions; hospitals, community AB Background. The National Institutes of Health and the Joint Committee on Infant Hearing have recommended universal newborn hearing screening. The feasibility of universal newborn hearing screening in a community hospital, however, has not been demonstrated. We initiated a universal newborn hearing screening program using transient evoked otoacoustic emissions (TEOAE) at a community hospital to assess the feasibility of universal hearing screening in this setting. Methods. A screening team composed of a family practice physician, family medicine resident, audiologist, and four technicians was developed. The study compared testing time between the technicians and the audiologist and assessed whether the technicians were able to perform hearing testing accurately and reliably. Results. A total of 627 infants were screened. Of those, 11 (1.8%) failed TEOAE screening and were referred to a tertiary care center for further evaluation. Six of the 11 referrals were found to have a hearing impairment. Trained technicians were found to be capable of performing the screening accurately and reliably. Conclusions. Universal newborn hearing screening using transient evoked otoacoustic emissions is feasible in a community hospital. C1 MALCOLM GROW MED CTR,DEPT FAMILY PRACTICE,ANDREWS AFB,MD. MALCOLM GROW MED CTR,DEPT AUDIOL,ANDREWS AFB,MD. CABARRUS MEM HOSP,CABARRUS FAMILY MED RESIDENCY,CONCORD,NC. NR 13 TC 12 Z9 12 U1 0 U2 0 PU APPLETON & LANGE PI E NORWALK PA 25 VAN ZANT ST, E NORWALK, CT 06855 SN 0094-3509 J9 J FAM PRACTICE JI J. Fam. Pract. PD MAY PY 1996 VL 42 IS 5 BP 487 EP 490 PG 4 WC Primary Health Care; Medicine, General & Internal SC General & Internal Medicine GA UL123 UT WOS:A1996UL12300013 PM 8642366 ER PT J AU Yin, J Finno, RJ Feldkamp, JR Chung, K AF Yin, J Finno, RJ Feldkamp, JR Chung, K TI Coefficient of permeability from AC electroosmosis experiments .1. Theory SO JOURNAL OF GEOTECHNICAL ENGINEERING-ASCE LA English DT Article AB Electroosmosis techniques have been used in geotechnical and geoenvironmental engineering applications. However, due to electrochemical changes and gas generation at the electrodes as a result of prolonged application of a direct current electric field, its application in determining soil properties has been limited. A methodology, which uses a weak alternating current (AC) as the driving force is developed to minimize these adverse effects. The governing partial differential equation for one-dimensional AC electroosmosis is presented for an experimental situation in a companion paper. Three boundary conditions, which reflect the possible range for a closed boundary are identified. Transient and steady-state solutions are given for the ideal undrained boundary conditions. Analytical steady-state solutions are given for the two nominally undrained boundary conditions. These solutions indicate that both small deformations of the boundary cavity and impedance effects due to relatively low permeability of an equivalent porus stone play an important role in the pore-pressure responses. Procedures based on the steady-state solutions for backcalculating the coefficient of permeability are presented. C1 NORTHWESTERN UNIV,DEPT CIVIL ENGN,EVANSTON,IL 60208. ADV SCI INC,TYNDALL AFB,FL. SAMSUNG ENGN & CONSTRUCT CO LTD,SEOUL,SOUTH KOREA. RP Yin, J (reprint author), ARMSTRONG LAB,TYNDALL AFB,FL 32403, USA. RI Finno, Richard/B-6941-2009 NR 24 TC 5 Z9 5 U1 0 U2 2 PU ASCE-AMER SOC CIVIL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-9410 J9 J GEOTECH ENG-ASCE JI J. Geotech. Eng.-ASCE PD MAY PY 1996 VL 122 IS 5 BP 346 EP 354 DI 10.1061/(ASCE)0733-9410(1996)122:5(346) PG 9 WC Engineering, Civil; Geosciences, Multidisciplinary SC Engineering; Geology GA UG903 UT WOS:A1996UG90300003 ER PT J AU Finno, RJ Chung, K Yin, J Feldkamp, JR AF Finno, RJ Chung, K Yin, J Feldkamp, JR TI Coefficient of permeability from AC electroosmosis experiments .2. Results SO JOURNAL OF GEOTECHNICAL ENGINEERING-ASCE LA English DT Article ID ELECTROKINETICS; KAOLINITE; REMOVAL AB Alternating current (AC) electroosmosis tests, which permit rapid determination of the coefficient of permeability of saturated cohesive soils are described. The testing device was developed to minimize the adverse effects of prolonged application of direct current on observed responses. The apparatus and procedures to conduct the AC experiments are presented and results of 19 experiments are analyzed In these tests, a weak AC is sinusoidally applied under nominally undrained boundary conditions to saturated kaolinite specimens; excess pore pressure and phase angle are measured at frequencies between 0.25 and 4 Hz. The results of the experimental program and the procedures of backcalculating the coefficient of permeability are presented. The coefficient of permeability from falling head permeability and AC electrosmosis tests on specimens of resedimented kaolinite are shown to agree within a factor of five. These data support the theoretical conclusions of the companion paper and suggest that this type of test is feasible to rapidly evaluate the coefficient of permeability of saturated cohesive soils in the laboratory. C1 SAMSUNG ENGN & CONSTRUCT CO LTD,SEOUL,SOUTH KOREA. ADV SCI INC,TYNDALL AFB,FL. ARMSTRONG LAB,TYNDALL AFB,FL. RP Finno, RJ (reprint author), NORTHWESTERN UNIV,DEPT CIVIL ENGN,EVANSTON,IL 60208, USA. RI Finno, Richard/B-6941-2009 NR 14 TC 6 Z9 6 U1 0 U2 1 PU ASCE-AMER SOC CIVIL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-9410 J9 J GEOTECH ENG-ASCE JI J. Geotech. Eng.-ASCE PD MAY PY 1996 VL 122 IS 5 BP 355 EP 364 DI 10.1061/(ASCE)0733-9410(1996)122:5(355) PG 10 WC Engineering, Civil; Geosciences, Multidisciplinary SC Engineering; Geology GA UG903 UT WOS:A1996UG90300004 ER PT J AU Kramer, SC Martin, RC AF Kramer, SC Martin, RC TI Direct optimization of gain scheduled controllers via genetic algorithms SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS LA English DT Article ID PLANTS AB A new approach to designing gain scheduled controllers in which controller performance is directly optimized over the operating envelope of the system is presented. Rather than interpolating between point designs, the basic controller form is selected, and then the controller's parameter schedule is computed to minimize the selected cost functional. The resulting optimization problem is difficult and ill behaved hut can be solved using genetic algorithms. The feasibility of the approach and the resulting performance improvements are demonstrated by designing several controllers for the longitudinal dynamics of an F-18 aircraft and comparing the results to a traditionally designed controller. C1 USAF, WRIGHT LAB, WRIGHT PATTERSON AFB, OH 45433 USA. NR 20 TC 13 Z9 13 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0731-5090 J9 J GUID CONTROL DYNAM JI J. Guid. Control Dyn. PD MAY-JUN PY 1996 VL 19 IS 3 BP 636 EP 642 DI 10.2514/3.21668 PG 7 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA UJ916 UT WOS:A1996UJ91600019 ER PT J AU Howard, RF Slawski, DP Gilula, LA AF Howard, RF Slawski, DP Gilula, LA TI Florid reactive periostitis of the digit with cortical erosion: A case report and review of the literature SO JOURNAL OF HAND SURGERY-AMERICAN VOLUME LA English DT Article RP Howard, RF (reprint author), WILFORD HALL USAF MED CTR,DEPT ORTHOPED,PSSB,LACKLAND AFB,TX 78236, USA. NR 9 TC 10 Z9 11 U1 0 U2 1 PU CHURCHILL LIVINGSTONE INC MEDICAL PUBLISHERS PI NEW YORK PA 650 AVENUE OF THE AMERICAS, NEW YORK, NY 10011 SN 0363-5023 J9 J HAND SURG-AM JI J. Hand Surg.-Am. Vol. PD MAY PY 1996 VL 21A IS 3 BP 501 EP 505 DI 10.1016/S0363-5023(96)80370-4 PG 5 WC Orthopedics; Surgery SC Orthopedics; Surgery GA UM645 UT WOS:A1996UM64500032 PM 8724487 ER PT J AU Alam, MK Goetz, RL Semiatin, SL AF Alam, MK Goetz, RL Semiatin, SL TI Modeling of thermal stresses and thermal cracking during heating of large ingots SO JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article ID ELEVATED-TEMPERATURES; DEFORMATION; FRACTURE AB The development of temperature gradients and thermal stresses during the heating of large ingots has been investigated with special reference to the selection of heating schedules for brittle intermetallic materials such as titanium aluminides. A 1-D analytical (series) solution for radial temperature transients was used in conjunction with an elasticity analysis to determine the maximum thermal stresses that would be generated during ingot heating. The temperature gradients and stresses were seen to be strongly dependent on Fourier and Biot Numbers. In addition, finite element method simulations incorporating end effects and variations of thermal and elastic properties with temperature were performed and compared to the analytical results. Comparison of the predicted thermal stresses and actual ingot heating observations suggest that cracking is controlled by a maximum normal stress criterion. C1 UES INC, DAYTON, OH 45432 USA. USAF, WRIGHT LAB, MAT DIRECTORATE, WRIGHT PATTERSON AFB, OH 45433 USA. RP OHIO UNIV, DEPT MECH ENGN, ATHENS, OH 45701 USA. RI SEMIATIN, SHELDON/E-7264-2017 NR 20 TC 1 Z9 2 U1 0 U2 2 PU ASME PI NEW YORK PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA SN 1087-1357 EI 1528-8935 J9 J MANUF SCI E-T ASME JI J. Manuf. Sci. Eng.-Trans. ASME PD MAY PY 1996 VL 118 IS 2 BP 235 EP 243 DI 10.1115/1.2831016 PG 9 WC Engineering, Manufacturing; Engineering, Mechanical SC Engineering GA VA694 UT WOS:A1996VA69400008 ER PT J AU Smith, F RamosGabatin, A Olalde, L AF Smith, F RamosGabatin, A Olalde, L TI Reduced particle size sulfur colloid for lymphoscintigraphy. SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,SAN ANTONIO,TX 78236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 22090-5316 SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 1996 VL 37 IS 5 SU S BP 1403 EP 1403 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA UL625 UT WOS:A1996UL62501222 ER PT J AU RamosGabatin, A Kelham, SA Morrison, JC Brown, JW AF RamosGabatin, A Kelham, SA Morrison, JC Brown, JW TI Hepatobiliary scintigraphy (HBS) after orthotopic liver transplantation (OLT) SO JOURNAL OF NUCLEAR MEDICINE LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,SAN ANTONIO,TX 78236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 22090-5316 SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD MAY PY 1996 VL 37 IS 5 SU S BP 1406 EP 1406 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA UL625 UT WOS:A1996UL62501225 ER PT J AU Leasure, R Hawkins, LA Merrill, A AF Leasure, R Hawkins, LA Merrill, A TI Stigma: Baccalaureate nursing students' attitudes toward persons living with AIDS SO JOURNAL OF NURSING EDUCATION LA English DT Article ID NURSES ATTITUDES; CARE; INTENTIONS C1 USAF,DOVER,DE. RP Leasure, R (reprint author), UNIV OKLAHOMA,COLL NURSING,POB 26901,OKLAHOMA CITY,OK 73190, USA. NR 21 TC 0 Z9 1 U1 1 U2 2 PU SLACK INC PI THOROFARE PA 6900 GROVE RD, THOROFARE, NJ 08086 SN 0148-4834 J9 J NURS EDUC JI J. Nurs. Educ. PD MAY PY 1996 VL 35 IS 5 BP 234 EP 236 PG 3 WC Nursing SC Nursing GA WQ915 UT WOS:A1996WQ91500009 PM 8718780 ER PT J AU Hoover, EG DuBois, JJ Samples, TL McCullough, JS Chenaille, PJ Montes, RG AF Hoover, EG DuBois, JJ Samples, TL McCullough, JS Chenaille, PJ Montes, RG TI Treatment of chronic enteritis in glycogen storage disease type IB with granulocyte colony-stimulating factor SO JOURNAL OF PEDIATRIC GASTROENTEROLOGY AND NUTRITION LA English DT Article ID INFLAMMATORY BOWEL-DISEASE; GLUCOSE-6-PHOSPHATE TRANSPORT-SYSTEM; CHRONIC GRANULOMATOUS-DISEASE; CROHNS-DISEASE; NEUTROPHIL DYSFUNCTION; POLYMORPHONUCLEAR LEUKOCYTES; DEFECT; PELIOSIS; COLITIS; METABOLISM C1 USAF,DAVID GRANT MED CTR,DEPT PEDIAT,TRAVIS AFB,CA 94535. USAF,DAVID GRANT MED CTR,DEPT SURG,TRAVIS AFB,CA 94535. USAF,DAVID GRANT MED CTR,DEPT RADIOL,TRAVIS AFB,CA 94535. USAF,DAVID GRANT MED CTR,DEPT PATHOL,TRAVIS AFB,CA 94535. NR 43 TC 9 Z9 9 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0277-2116 J9 J PEDIATR GASTR NUTR JI J. Pediatr. Gastroenterol. Nutr. PD MAY PY 1996 VL 22 IS 4 BP 346 EP 350 DI 10.1097/00005176-199605000-00002 PG 5 WC Gastroenterology & Hepatology; Nutrition & Dietetics; Pediatrics SC Gastroenterology & Hepatology; Nutrition & Dietetics; Pediatrics GA UK168 UT WOS:A1996UK16800002 PM 8732896 ER PT J AU Walling, K AF Walling, K TI John Quincy Adams and the public virtues of diplomacy - Russell,G SO JOURNAL OF POLITICS LA English DT Book Review RP Walling, K (reprint author), USAF ACAD,COLORADO SPRINGS,CO 80840, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV TEXAS PRESS PI AUSTIN PA BOX 7819, AUSTIN, TX 78713-7819 SN 0022-3816 J9 J POLIT JI J. Polit. PD MAY PY 1996 VL 58 IS 2 BP 603 EP 605 DI 10.2307/2960262 PG 3 WC Political Science SC Government & Law GA UR177 UT WOS:A1996UR17700040 ER PT J AU Rusek, JJ AF Rusek, JJ TI New decomposition catalysts and characterization techniques for rocket-grade hydrogen peroxide SO JOURNAL OF PROPULSION AND POWER LA English DT Article; Proceedings Paper CT AIAA/ASME/SAE/ASEE 31st Joint Propulsion Conference and Exhibit CY JUL 10-12, 1995 CL SAN DIEGO, CA SP AIAA, ASME, SAE, ASEE AB Traditionally, macroscopic metallic screens and coated ceramic pellets have been used as catalysts for the decomposition of hydrogen peroxide as applied to monopropellant thrusters, liquid rocket engines, and hybrid rocket systems. Catalyst activity depends on available catalytic surface area; metallic catalyst stability is generally degraded by catalyst oxidation. New approaches to forming inexpensive, high surface area decomposition catalyst packs for flightweight applications that do not suffer From oxidative degradation will be discussed. This article will also specifically discuss analytical methods For the assay of hydrogen peroxide and the precise determination of inhibitor species. The synthesis, characterization, and evaluation of high surface area catalyst beds will be discussed as compared to traditional propulsion catalysts. Finally, the effects of valence state and cation type on catalyst activity will be discussed. C1 USAF,PHILLIPS LAB,EDWARDS AFB,CA 93524. NR 8 TC 27 Z9 28 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD MAY-JUN PY 1996 VL 12 IS 3 BP 574 EP 579 DI 10.2514/3.24071 PG 6 WC Engineering, Aerospace SC Engineering GA UL423 UT WOS:A1996UL42300016 ER PT J AU Rall, DLA Kofsky, IL Pike, CP Knecht, DJ Zehnpfennig, TP AF Rall, DLA Kofsky, IL Pike, CP Knecht, DJ Zehnpfennig, TP TI Optical radiations from interaction of effluent gases with the low-orbital atmosphere SO JOURNAL OF SPACECRAFT AND ROCKETS LA English DT Article ID SPACE-SHUTTLE EXHAUST; EXCITATION; CONTAMINATION; COLLISIONS; WATER; O(3P); H2O; CO2 AB The radiance distributions of the short-wavelength infrared and visible glows associated with interaction of exhaust from Shuttle orbiter's primary reaction control system thrusters with background air are interpreted as resulting from independent kinetic processes involving major and fuel-fragment components of the hypervelocity combustion gas, These luminous volumes become essentially stable in the spacecraft's moving reference frame by 1 s after the engine's liquid bipropellant ignites, with dimensions on the order of kilometers. Viewed perpendicular to the vehicle trajectory, they have Gaussian brightness profiles in ram and, at visible wavelengths, an edge-enhanced ogival shape in wake injections, Strong vibrational emission arises from collisions of water molecules, which also emit over a broad infrared range when outgassed from low-orbiting spacecraft, Other phenomenological features of these optical-contaminant glows quantified from ground-based radiometric images include 1) total exoatmospheric photon yields, 2) volume emission rates and downstream movement of the surface brightness maxima as the ambient reactant species becomes depleted, and 3) cross sections for quenching the luminosity, The absolute visible-band intensities from three exhaust directions indicate a potential barrier for the excitative reactions, and with the patterns of projected radiance apply in remote sensing of angles between the thrust axis and the spacecraft velocity. C1 USAF,PHILLIPS LAB,SPACECRAFT INTERACT BRANCH,BEDFORD,MA 01731. RP Rall, DLA (reprint author), PHOTOMETR INC,WOBURN,MA 01801, USA. NR 50 TC 3 Z9 3 U1 0 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0022-4650 J9 J SPACECRAFT ROCKETS JI J. Spacecr. Rockets PD MAY-JUN PY 1996 VL 33 IS 3 BP 393 EP 403 DI 10.2514/3.26773 PG 11 WC Engineering, Aerospace SC Engineering GA UQ303 UT WOS:A1996UQ30300013 ER PT J AU Chen, F Bowman, WJ Bowersox, R AF Chen, F Bowman, WJ Bowersox, R TI Effect of transpiration cooling on nozzle heat transfer SO JOURNAL OF SPACECRAFT AND ROCKETS LA English DT Article RP Chen, F (reprint author), USAF,INST TECHNOL,AERO ASTRONAUT ENGN DEPT,WRIGHT PATTERSON AFB,OH 45433, USA. NR 7 TC 2 Z9 2 U1 1 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0022-4650 J9 J SPACECRAFT ROCKETS JI J. Spacecr. Rockets PD MAY-JUN PY 1996 VL 33 IS 3 BP 453 EP 455 DI 10.2514/3.26784 PG 3 WC Engineering, Aerospace SC Engineering GA UQ303 UT WOS:A1996UQ30300024 ER PT J AU Santos, E AF Santos, E TI On linear potential functions for approximating Bayesian computations SO JOURNAL OF THE ACM LA English DT Article DE artificial intelligence; data compaction and compression; integer programming; least squares approximation; pattern recognition; probabilistic reasoning; uncertainty ID INFERENCE AB Probabilistic reasoning suffers from NP-hard implementations. In particular, the amount of probabilistic information necessary to the computations is often overwhelming. For example, the size of conditional probability tables in Bayesian networks has long been a limiting factor in the general use of these networks. We present a new approach for manipulating the probabilistic information given. This approach avoids being overwhelmed by essentially compressing the information using approximation functions called linear potential functions. We can potentially reduce the information from a combinatorial amount to roughly linear in the number of random variable assignments. Furthermore, we can compute these functions through closed form equations. As it turns out, our approximation method is quite general and may be applied to other data compression problems. RP USAF, INST TECHNOL, DEPT ELECT & COMP ENGN, WRIGHT PATTERSON AFB, OH 45433 USA. NR 32 TC 7 Z9 7 U1 1 U2 2 PU ASSOC COMPUTING MACHINERY PI NEW YORK PA 2 PENN PLAZA, STE 701, NEW YORK, NY 10121-0701 USA SN 0004-5411 EI 1557-735X J9 J ACM JI J. ACM PD MAY PY 1996 VL 43 IS 3 BP 399 EP 430 DI 10.1145/233551.233552 PG 32 WC Computer Science, Hardware & Architecture; Computer Science, Information Systems; Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA VA957 UT WOS:A1996VA95700001 ER PT J AU Sullivan, JM Hubbard, JE Burke, SE AF Sullivan, JM Hubbard, JE Burke, SE TI Modeling approach for two-dimensional distributed transducers of arbitrary spatial distribution SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID PIEZOELECTRIC ACTUATORS; SENSORS; PLATES AB A new modeling method for two-dimensional distributed transducers with arbitrary spatial distribution is presented. The spatial weighting of a distributed transducer is defined using multidimensional distributions with composite functions as arguments. A differentiation theorem is derived for one-dimensional distributions of composite functions and is extended to multidimensions through the use of partial distributional derivatives and the product rule. The resulting theory is used to determine the differential operator describing the distributed transducer's spatial dynamics. The methodology, which is valid for both uniaxial and biaxial transducers, is applied to several two-dimensional problems. (C) 1996 Acoustical Society of America. C1 BOSTON UNIV,CTR PHOTON RES,BOSTON,MA 02115. RP Sullivan, JM (reprint author), USAF,PHILLIPS LAB,PL VTS,3550 ABERDEEN AVE,KIRTLAND AFB,NM 87117, USA. NR 26 TC 24 Z9 24 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD MAY PY 1996 VL 99 IS 5 BP 2965 EP 2974 DI 10.1121/1.414861 PG 10 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA UK253 UT WOS:A1996UK25300036 ER PT J AU Cinibulk, MK Hay, RS AF Cinibulk, MK Hay, RS TI Textured magnetoplumbite fiber-matrix interphase derived from sol-gel fiber coatings SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Review ID GRAIN-BOUNDARY SEGREGATION; GLASS-CERAMIC COMPOSITES; YTTRIUM-ALUMINUM-GARNET; BETA-ALUMINA; ALPHA-ALUMINA; ENHANCED DENSIFICATION; ALUMINOSILICATE GELS; SINTERED ALUMINA; GROWTH; OXIDE AB A calcium hexaluminate (CaAl12O19, magnetoplumbite structure) sol was used to coat alumina and yttrium-aluminum-garnet (YAG) single-crystal fibers and single-crystal alumina plates. When the coated substrates were either annealed or hot-pressed in polycrystalline alumina and YAG matrices, the calcium hexaluminate basal cleavage planes were aligned parallel with the fiber-matrix interface. A complex series of reactions and phase transformations contributed to texture formation on alumina substrates, The alumina fibers and plates seeded the phase transformation of sol-derived transition aluminas to alpha-Al2O3. CaAl12O19 and CaAl4O7 formed between the seeded alpha-Al2O3, and CaAl4O7 later reacted with the seeded alpha-Al2O3 to form CaAl12O19, resulting in a single-phase coating. Several different mechanisms may be responsible for the texture. The microstructure, phase evolution, and possible mechanisms for texture formation of CaAl12O19 powders, sol-derived thin films, and coated plates and fibers, with and without hot-pressed matrices, were studied and are discussed. Deflection and propagation of cracks within the fiber-matrix interphase in thin foils suggests that such an interphase may protect fibers from matrix cracks. RP Cinibulk, MK (reprint author), WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 113 TC 75 Z9 75 U1 2 U2 11 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAY PY 1996 VL 79 IS 5 BP 1233 EP 1246 DI 10.1111/j.1151-2916.1996.tb08578.x PG 14 WC Materials Science, Ceramics SC Materials Science GA UM323 UT WOS:A1996UM32300014 ER PT J AU Henry, LR McGrath, BV Alley, TG Kester, JJ AF Henry, LR McGrath, BV Alley, TG Kester, JJ TI Optical nonlinearity in fused silica by proton implantation SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID 2ND-ORDER NONLINEARITY; GENERATION; GLASSES AB Optical nonlinearity was induced in fused silica through proton implantation. Average chi((2)) of the order of 1.0 pm/V were induced in low-water fused silica, with isolated regions exhibiting chi((2)) as high as 1.6 pm/V. A minimum dosage of 0.25-0.5 mC was found to be effective in generating the second harmonic in fused silica. A minimum irradiation time of 10-15 s was found to be necessary to set up the space-charge region adequately. Finally, the predominant type of microscopic lattice damage associated with proton-bombarded fused silicas was found to be the silicon E' defect site. (C) 1996 Optical Society of America RP Henry, LR (reprint author), USAF ACAD,FRANK J SEILER RES LAB,SUITE 1J19,2354 VANDENBERG DR,COLORADO SPRINGS,CO 80840, USA. NR 18 TC 12 Z9 12 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD MAY PY 1996 VL 13 IS 5 BP 827 EP 836 DI 10.1364/JOSAB.13.000827 PG 10 WC Optics SC Optics GA UJ960 UT WOS:A1996UJ96000008 ER PT J AU Kearse, WS Sago, AL Peretsman, SJ Bolton, JO Holcomb, RG Reddy, PK Bernhard, PH Eppel, SM Lewis, JH Gladshteyn, M Melman, AA AF Kearse, WS Sago, AL Peretsman, SJ Bolton, JO Holcomb, RG Reddy, PK Bernhard, PH Eppel, SM Lewis, JH Gladshteyn, M Melman, AA TI Report of a multicenter clinical evaluation of the dura-II penile prosthesis SO JOURNAL OF UROLOGY LA English DT Article; Proceedings Paper CT Annual Meeting of American-Urological-Association CY APR 23-28, 1995 CL LAS VEGAS, NV SP Amer Urol Assoc DE penis; impotence; penile prosthesis ID FOLLOW-UP; PATIENT SATISFACTION; PARTNER SATISFACTION; EARLY EXPERIENCE AB Purpose: Information was collected during the first 2 years of an ongoing, prospective, multiinstitutional evaluation of the Dura-II dagger penile prosthesis. Evaluation included data on clinical outcomes and a patient satisfaction survey, and will continue for 5 years after implantation for each patient. Materials and Methods: To date 196 patients have been evaluated, Surgical data, adverse events and information from satisfaction surveys are reported. Results: At a followup of 13.4 +/- 8.4 months postoperatively, adverse events occurred in 8.2% of the patients, resulting in reoperation in 5.1%. There have been no mechanical failures. Overall satisfaction rates were 85% at 3 months, 83% at 1 year and 91% at 2 years after implantation, and levels of sexual functioning were correspondingly high. A majority of patients assigned high scores to rigidity, concealability, ability to have intercourse and erection size, although satisfaction with erection size ranked lower than the other measures. Conclusions: The Dura-II penile prosthesis provides a satisfactory result and has an acceptable level of complications associated with its use, Further followup will assess temporal changes in satisfaction rates and sexual functioning for these patients. C1 WILFORD HALL USAF MED CTR,DEPT UROL,SAN ANTONIO,TX 78236. UNIV MINNESOTA,MED CTR,DEPT UROL,MINNEAPOLIS,MN 55455. MONTIFORE ALBERT EINSTEIN MED CTR,DEPT UROL,BRONX,NY. NR 14 TC 11 Z9 11 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0022-5347 J9 J UROLOGY JI J. Urol. PD MAY PY 1996 VL 155 IS 5 BP 1613 EP 1616 DI 10.1016/S0022-5347(01)66143-3 PG 4 WC Urology & Nephrology SC Urology & Nephrology GA UF008 UT WOS:A1996UF00800021 PM 8627835 ER PT J AU Voevodin, AA Walck, SD Solomon, JS John, PJ Ingram, DC Donley, MS Zabinski, JS AF Voevodin, AA Walck, SD Solomon, JS John, PJ Ingram, DC Donley, MS Zabinski, JS TI Structure and properties of diamondlike carbon films produced by pulsed laser deposition SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A LA English DT Article; Proceedings Paper CT 42nd National Symposium of the American-Vacuum-Society CY OCT 16-20, 1995 CL MINNEAPOLIS, MN SP Amer Vacuum Soc ID AMORPHOUS-CARBON; SPECTROSCOPY AB Pulsed laser deposition was used to produce hydrogen-free amorphous diamondlike carbon (a-C) and hydrogenated amorphous diamondlike carbon (a-C:H) from graphite and polycarbonate targets, respectively. Films were grown under identical conditions in high vacuum at low temperatures onto steel and Si substrates. The a-C films were uniform, while a-C:H films contained a great number of particles ejected from the target surface. The a-C films have hydrogen contamination about 0.1 at. %, while a-C:H have about 25 at. % H and 10 at. % O. High percentages of sp(3) bonding were found in both films. Film densities were estimated to be 3.0 g cm(-3) for a-C films and 2.2 g cm(-3) for a-C:H films. Chemical and structural characteristics of the films were correlated with their thermal stability and mechanical properties. Temperatures for starting graphitization were about 500 degrees C for a-C and 350 degrees C for a-C:H. The presence of hydrogen reduced film hardness from 60 GPa for a-C films to 14 GPa for a-C:H films. Hydrogen was also associated with dependence of a-C:H films friction coefficient on environment and with higher wear rates of a-C:H films in comparison to a-C films. (C) 1996 American Vacuum Society. C1 UNIV DAYTON, RES INST, DAYTON, OH 45469 USA. OHIO UNIV, DEPT PHYS & ASTRON, ATHENS, OH 45701 USA. RP Voevodin, AA (reprint author), WRIGHT LAB, MLBT, WRIGHT PATTERSON AFB, OH 45433 USA. RI Voevodin, Andrey/I-6684-2013 NR 34 TC 40 Z9 40 U1 0 U2 3 PU A V S AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0734-2101 EI 1520-8559 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A PD MAY-JUN PY 1996 VL 14 IS 3 BP 1927 EP 1932 DI 10.1116/1.580362 PN 2 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA UR133 UT WOS:A1996UR13300108 ER PT J AU Sorel, RA AF Sorel, RA TI Silicon-based group IV heterostructures for optoelectronic applications SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article; Proceedings Paper CT 42nd National Symposium of the American-Vacuum-Society CY OCT 16-20, 1995 CL MINNEAPOLIS, MN SP Amer Vacuum Soc ID BAND-GAP; SEMICONDUCTOR AB This article presents an overview of trends and progress in group IV heterostructures for optoelectronics. The outlook is good in electronics because the commercialization of SiGe/Si heterotransitors is proceeding nicely. However, the pace of progress is slower in SiGe/Si photonics. This article covers five innovative topics in an effort to enhance the development of heterostructure photonics: (1) band-gap studies of SiGeC, an alloy that can be lattice matched to Si, (2) direct-band-gap, strained heterostructures of GeSn upon GeSi/Si, (3) silicon-based quantum-well intersubband lasers (ISBLs) including SiGe/Si quantum-cascade, Raman, and inversionless ISBLs, (4) 1.5 mu m ISBLs based on Si quantum wells with high barriers, such as heterosystems of Si/ZnS, and Si with SiO2/Si strained superlattice barriers, and (5) low-cost substrates of 3C SiC upon SiO2/Si, a platform for SiC heterodevices and for InGaN/AlGaN heterodevices. RP Sorel, RA (reprint author), USAF,ROME LAB,EROC,BEDFORD,MA 01731, USA. NR 41 TC 65 Z9 65 U1 2 U2 24 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD MAY-JUN PY 1996 VL 14 IS 3 BP 913 EP 918 DI 10.1116/1.580414 PN 1 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA UR134 UT WOS:A1996UR13400047 ER PT J AU Eyink, KG Capano, MA Walck, SD Haas, TW Streetman, BG AF Eyink, KG Capano, MA Walck, SD Haas, TW Streetman, BG TI In situ and ex situ spectroscopic investigation of low temperature grown gallium arsenide by molecular beam epitaxy SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 15th North American Conference on Molecular Beam Epitaxy CY SEP 17-20, 1995 CL UNIV MARYLAND, COLLEGE PK, MD HO UNIV MARYLAND ID GAAS-LAYERS; ELLIPSOMETRY AB Low temperature growth of GaAs not only provides useful semi-insulating layers in a variety of devices, but also is interesting from a materials and crystal growth point of view. In this work we have utilized an in situ spectroscopic ellipsometer having 44 wavelength regions in the range 4000-8000 Angstrom to monitor the low temperature growth of GaAs. Several different regions of growth have been observed, in agreement with earlier studies utilizing single wavelength ellipsometry. An initial region of homogeneous growth is followed by regions of material that exhibit varying optical properties. The complex refractive index of the epitaxial LT-GaAs films have been extracted from the real-time data acquired during the homogenous growth region. Ex situ characterization of these films was performed using high-resolution x-ray diffraction to determine the excess As concentration. Films in which the low temperature growth was stopped within the homogeneous growth regime have been characterized with a multiwavelength variable angle ellipsometer, and the complex refractive index of these films in the range 4000-17000 Angstrom have been extracted. (C) 1996 American Vacuum Society. C1 UNIV TEXAS,MICROELECTR RES CTR,AUSTIN,TX 78712. RP Eyink, KG (reprint author), WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 14 TC 7 Z9 7 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD MAY-JUN PY 1996 VL 14 IS 3 BP 2278 EP 2281 DI 10.1116/1.588919 PG 4 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA UU480 UT WOS:A1996UU48000140 ER PT J AU Moretti, CJ Kopchynski, DM Cruise, TL AF Moretti, CJ Kopchynski, DM Cruise, TL TI Controlling microbial biota transfer in the Garrison diversion unit SO JOURNAL OF WATER RESOURCES PLANNING AND MANAGEMENT-ASCE LA English DT Article AB The Garrison diversion unit is a canal system designed to distribute water from the Missouri River basin into western and eastern North Dakota. Canada has opposed the completion of the Garrison diversion unit because of a concern that the water sent to eastern North Dakota may degrade Canadian fisheries when it reaches Hudson Bay. To address this concern, a research project was done to evaluate the use of three different disinfection processes to inactivate harmful microorganisms in Garrison diversion unit water, The processes considered were chlorination, ozonation, and ultraviolet light. The objective was to identify a cost-effective means for inactivating bacteria and viruses that cannot be efficiently removed by broad-brush physical processes such as direct filtration or screening. The main criteria used to evaluate the three disinfection processes were reliability, cost, and potential adverse effects. The results indicated that chlorination was the most reliable and least expensive process but that ozone had fewer potential adverse effects. Ozone would also be a reliable process if the water were filtered before disinfection. C1 UNIV MINNESOTA,DEPT CIVIL ENGN,MINNEAPOLIS,MN 55455. USAF,GREAT FALLS,MT 59401. RP Moretti, CJ (reprint author), UNIV N DAKOTA,GRAND FORKS,ND 58202, USA. NR 18 TC 0 Z9 0 U1 1 U2 3 PU ASCE-AMER SOC CIVIL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-9496 J9 J WATER RES PL-ASCE JI J. Water Resour. Plan. Manage.-ASCE PD MAY-JUN PY 1996 VL 122 IS 3 BP 197 EP 204 DI 10.1061/(ASCE)0733-9496(1996)122:3(197) PG 8 WC Engineering, Civil; Water Resources SC Engineering; Water Resources GA UG712 UT WOS:A1996UG71200007 ER PT J AU Arriaga, MA Gorum, M AF Arriaga, MA Gorum, M TI Indications and variations of transcochlear exposure of the ventral brainstem SO LARYNGOSCOPE LA English DT Article AB The transcochlear exposures represent a spectrum of three approaches (transotic to transcochlear to transpetrous) that provide progressively wider lateral skull base exposure. The approaches all combine the translabyrinthine approach with removal of the cochlea. The facial nerve remains in situ in the transotic approach. The facial nerve is mobilized posteriorly in the transcochlear approach, and the transpetrous exposure adds resection of the petrous apex with carotid artery mobilization. This report focuses on the indications for each of the variations of transcochlear exposure. These lateral skull base exposures can be individualized to the needs of each patient. C1 WILFORD HALL USAF MED CTR,DEPT OTOLARYNGOL,LACKLAND AFB,TX 78236. WILFORD HALL USAF MED CTR,DEPT NEUROSURG,LACKLAND AFB,TX 78236. NR 4 TC 2 Z9 2 U1 0 U2 0 PU LARYNGOSCOPE CO PI ST LOUIS PA 10 S BROADWAY 14TH FLOOR, ST LOUIS, MO 63102-1741 SN 0023-852X J9 LARYNGOSCOPE JI Laryngoscope PD MAY PY 1996 VL 106 IS 5 BP 639 EP 644 DI 10.1097/00005537-199605000-00023 PN 1 PG 6 WC Medicine, Research & Experimental; Otorhinolaryngology SC Research & Experimental Medicine; Otorhinolaryngology GA UT403 UT WOS:A1996UT40300022 PM 8628096 ER PT J AU Owens, DW Parnell, GS Bivins, RL AF Owens, DW Parnell, GS Bivins, RL TI Strategic arms reduction treaty (start) drawdown analyses SO OPERATIONS RESEARCH LA English DT Article AB This study investigated the feasibility and impacts of various U.S. and USSR time-phased strategic force structure reduction alternatives (commonly referred to as drawdowns) under the Strategic Arms Reduction Treaty (START). The study resulted from the Soviet Union's request for a U.S. position on the proposed Soviet drawdown limits. Treaty drawdown limits are time-phased numerical ceilings specified in the treaty, e.g., total weapons must be less than or equal to 8000 by January 1, 1996 and 6000 by January 1, 1998. Various modernized START force structures were evaluated under four drawdown limit alternatives. Two linear programming models (U.S. and USSR) were developed to rapidly assess each drawdown limit alternative. The models determined drawdown feasibility and identified the systems to dismantle each year to maximize farce capability. For the U.S., the preferred drawdown limit alternatives were independent of the force structures considered, primarily because constraints on U.S. destruction rates drove the drawdown. Far the USSR, significant differences occurred between each drawdown limit alternative, especially concerning multiple warhead systems like the SS-18. The results of this study were used to determine the U.S. START negotiation positions and assess the final START agreement. C1 VIRGINIA COMMONWEALTH UNIV,RICHMOND,VA. RP Owens, DW (reprint author), USAF,WASHINGTON,DC 20330, USA. NR 4 TC 0 Z9 0 U1 0 U2 1 PU OPERATIONS RES SOC AMER PI BALTIMORE PA 1314 GUILFORD AVENUE BUSINESS OFFICE, BALTIMORE, MD 21202 SN 0030-364X J9 OPER RES JI Oper. Res. PD MAY-JUN PY 1996 VL 44 IS 3 BP 425 EP 434 DI 10.1287/opre.44.3.425 PG 10 WC Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA VW839 UT WOS:A1996VW83900001 ER PT J AU Rupp, DC Hermesch, CB Charlton, DG AF Rupp, DC Hermesch, CB Charlton, DG TI Effect of triturator speed variation on physical properties of encapsulated glass-ionomer luting cements SO OPERATIVE DENTISTRY LA English DT Article AB This in vitro study evaluated the effect of variation of triturator mixing speed on the physical properties of two encapsulated glass-ionomer luting cements. Physical properties evaluated were working time, setting time, film thickness, and 24-hour and 7-day compressive strengths. Encapsulated glass-ionomer luting cements were mixed at 3000, 3500, 4000 (control), and 4500 cycles per minute (cpm). An oscillating rheometer was used to determine working and setting times. Film thickness and compressive strength were determined using methods described in ANSI/ADA Specification No 66 for dental glass-ionomer cements. Results of the study indicated that decreased mixing speed may prolong working and setting times for Ketac-Cem Maxicap and Fuji Cap I. Within the range of 3500 to 4500 cpm, variations in mixing speed do not significantly affect compressive strength or film thickness values for either cement. Excessively slow mixing speed (3000 cpm) often resulted in the presence of unmixed powder expressed from the capsule nozzle prior to the expression of mixed cement. The presence of this unmixed powder results in a decreased powder/liquid ratio, which may have an adverse effect on the physical properties of the set cement. RP Rupp, DC (reprint author), WILFORD HALL USAF MED CTR,DEPT GEN DENT,LACKLAND AFB,TX 78236, USA. NR 13 TC 3 Z9 4 U1 0 U2 0 PU UNIV WASHINGTON PI SEATTLE PA SCHOOL DENTISTRY SM-57, SEATTLE, WA 98195 SN 0361-7734 J9 OPER DENT JI Oper. Dent. PD MAY-JUN PY 1996 VL 21 IS 3 BP 96 EP 102 PG 7 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA UJ451 UT WOS:A1996UJ45100003 PM 9002868 ER PT J AU Gupta, B Agarwala, A Moy, JJ Edward, DP AF Gupta, B Agarwala, A Moy, JJ Edward, DP TI The effects of subconjunctival verapamil on filtering blebs in rabbits SO OPHTHALMIC SURGERY AND LASERS LA English DT Article ID GLAUCOMA FILTRATION SURGERY; POSTOPERATIVE ADHESION FORMATION; CALCIUM-CHANNEL BLOCKADE; TOPICAL MITOMYCIN-C; ANIMAL-MODEL; FISTULIZING SURGERY; 5-FLUOROURACIL; COMPLICATIONS; HYPOTONY; TRABECULECTOMIES AB BACKGROUND AND OBJECTIVE: Verapamil is a calcium antagonist that has been shown to modulate wound healing through multiple mechanisms. The wound modulating effects of verapamil were studied in a rabbit model of filtering surgery. MATERIALS AND METHODS: Twenty New Zealand albino rabbits underwent a fistulizing procedure, with either verapamil or saline injected subconjunctivally daily for 6 days following surgery. The animals were sacrificed at 20 days after the fistulizing procedure. The effectiveness of verapamil in modulating wound healing was evaluated by bleb patency testing, histology, measurement of scar thickness, and counts of bromodeoxyuridine (BrdU)-labeled cells at the sclerostomy site. RESULTS: The group treated with verapamil had a 44% patency rate compared with 10% in the control group (P <.05), a mean scar thickness of 195.96 +/- 68 mu m compared with 313.55 +/- 110.4 mu m in the control group (P<.02), and a mean BrdU-labeled cell count of 15.5 +/- 14.7 compared with 26.3 +/- 17.0 in the control group (P =.002). CONCLUSION: Verapamil was effective in reducing scar formation at the sclerostomy site, At the doses administered, verapamil appeared to modulate wound healing in filtering blebs in the rabbit model. Further studies are needed to determine the dose-response and the efficacy of the drug in nonhuman primates. C1 UNIV ILLINOIS,COLL MED,EYE & EAR INFIRM,DEPT OPHTHALMOL,CHICAGO,IL 60612. USAF,SCOTT AFB,IL. NR 29 TC 2 Z9 2 U1 0 U2 0 PU SLACK INC PI THOROFARE PA 6900 GROVE RD, THOROFARE, NJ 08086 SN 0022-023X J9 OPHTHALMIC SURG LAS JI Ophthalmic Surg. Lasers PD MAY PY 1996 VL 27 IS 5 BP 378 EP 383 PG 6 WC Ophthalmology; Surgery SC Ophthalmology; Surgery GA UM393 UT WOS:A1996UM39300008 PM 8860605 ER PT J AU Podojil, GM Farmer, BL Adams, WW AF Podojil, GM Farmer, BL Adams, WW TI Molecular dynamics simulations of siloxane-based side chain liquid crystalline polymers SO POLYMER LA English DT Article DE molecular dynamics; liquid crystal; siloxane; cholesterol; biphenyl AB Molecular dynamics simulations have been performed to study the intramolecular interactions of biphenyl ({B}) and cholesterol ({C}) substituents on linear oligomeric siloxanes. These interactions are of interest due to the liquid crystalline behaviour of these materials. Molecules with alternating diblock and triblock substituent arrangements were examined, as were unmixed substituents. The orientational behaviour of the mesogens and the stability of {B}-{B}, {C}-{C}, and {B}-{C} interactions were characterized by an order parameter for the mesogens as a function of simulation time. Results indicate that the {C}-{C} interaction is the strongest, with the {B}-{B} and {B}-{C} interactions being weaker. However, the arrangement of {B} and {C} mesogens in the different molecules strongly influenced the level of mesogen ordering. The flexibilities of the siloxane backbone and the spacer groups used to attach the mesogens give the mesogens a wide range of motion, allowing them to and energetically favourable arrangements and moderate to high order parameters. C1 UNIV VIRGINIA,DEPT MAT SCI & ENGN,CHARLOTTESVILLE,VA 22901. MLPJ,MAT DIRECTORATE,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433. RI Adams, Wade/A-7305-2010 NR 21 TC 2 Z9 2 U1 0 U2 2 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0032-3861 J9 POLYMER JI Polymer PD MAY PY 1996 VL 37 IS 10 BP 1825 EP 1832 DI 10.1016/0032-3861(96)87298-3 PG 8 WC Polymer Science SC Polymer Science GA UL533 UT WOS:A1996UL53300008 ER PT J AU Trohalaki, S AF Trohalaki, S TI Molecular dynamics simulation of a single-component molecular composite: Poly(p-phenylene benzobisthiazole)/meta-poly(aryl ether ketone) block copolymer SO POLYMER LA English DT Article DE molecular dynamics simulations; molecular composites; rigid-rod polymers ID FLEXIBLE SIDE-CHAINS; RIGID-ROD POLYMERS; MICROFIBRILLAR NETWORK; FIBERS; COILS AB Molecular dynamics simulations were performed with a model of a single-component molecular composite in the form of a block copolymer composed of poly(p-phenylene benzobisthiazole) rigid-rod and flexible meta-poly(aryl ether ketone) subunits. The molecular composite concept, applied to improve the compressive strength of rigid-rod polymers and to improve their solubility, relies on a uniform distribution of rods in a coil-like matrix. Pair distribution functions, orientation correlation functions and correlation volumes calculated from equilibrium dynamics trajectories of bulk copolymer, coil homopolymer and rigid-rod homopolymer systems imply that, while inter-rod spacing is only slightly increased in the copolymer, correlation of rod orientation is greatly reduced but to a somewhat lesser extent than previously found for a graft copolymer composed of identical subunits. Conformations of the flexible blocks extend to accommodate the partial rod alignment. The block copolymer topology appears to be a viable alternative to the hairy-rod graft copolymer as a single-component molecular composite. RP Trohalaki, S (reprint author), MLPJ,WRIGHT LAB,BLDG 651,3005 P ST,SUITE 1,WRIGHT PATTERSON AFB,OH 45433, USA. NR 26 TC 4 Z9 4 U1 2 U2 5 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0032-3861 J9 POLYMER JI Polymer PD MAY PY 1996 VL 37 IS 10 BP 1841 EP 1845 DI 10.1016/0032-3861(96)87300-9 PG 5 WC Polymer Science SC Polymer Science GA UL533 UT WOS:A1996UL53300010 ER PT J AU Patterson, RF Mykytiuk, PD AF Patterson, RF Mykytiuk, PD TI Solid-state, vapor phase, and aqueous cleaners for aerospace manufacturing operations SO SAMPE JOURNAL LA English DT Article AB The aerospace industry is keenly aware of the Government phase-out schedule for ozone-depleting chemicals (ODCs) and the tightening regulations on volatile organic compounds (VOCs). These schedules and regulations are driving the aerospace industry in particular to invest a great deal of effort toward the replacement of the restricted chemicals. Fortunately, the Government offers a lot of free help in this area. This paper focuses on five examples of what the Government and industry are doing to replace the offending cleaning agents used in various manufacturing cleaning operations: 1) Wright Laboratory at Wright-Patterson Air Force Base is funding industry efforts to develop long-term solid-state cleaning technologies to leapfrog liquid cleaning technology. 2) Sandia National Laboratory has gone through a step-by-step program to replace trichloroethylene (TCE) degreasing and isopropyl alcohol (IPA) rinsing. 3) Rocketdyne Division of Rockwell developed an excellent in-depth plan to identify effective all-purpose aqueous cleaners for replacing trichlorotrifluoroethane (CFC-113) and 1,1,1-trichloroethane (TCA) degreasing agents. 4) Northrop conducted a screening test program that narrowed 50 candidate aqueous degreasing cleaners to one that successfully replaced TCA degreasing. 5) Hughes Aircraft Company has developed four innovative environmental technologies that are being used to preclude the need for ODCs in several cleaning applications. Solid-state, vapor phase, and aqueous cleaners were found in all cases to be successful in a variety of applications for aerospace manufacturing operations. C1 USAF,WRIGHT LAB,POLLUT PREVENT R&C OFF,WASHINGTON,DC. RP Patterson, RF (reprint author), HUGHES AIRCRAFT CO,COMPONENTS & MAT CTR,CULVER CITY,CA 90230, USA. NR 15 TC 1 Z9 1 U1 0 U2 0 PU SAMPE PUBLISHERS PI COVINA PA 1161 PARKVIEW DRIVE, COVINA, CA 91722 SN 0091-1062 J9 SAMPE J JI Sampe J. PD MAY-JUN PY 1996 VL 32 IS 3 BP 40 EP 49 PG 10 WC Engineering, Multidisciplinary; Materials Science, Multidisciplinary SC Engineering; Materials Science GA WT384 UT WOS:A1996WT38400007 ER PT J AU Butler, MG Fuchigami, KD Chako, A AF Butler, MG Fuchigami, KD Chako, A TI MRI of posterior knee masses SO SKELETAL RADIOLOGY LA English DT Review DE popliteal; mass; magnetic resonance imaging ID EXTREMITIES AB A wide variety of masses may be visualized in the posterior knee. Some are encountered incidentally on MRI obtained for seemingly unrelated symptoms; others are palpable and present for MRI characterization. We describe the appearance, significance and pathophysiology of some of the most common lesions found in the popliteal fossa as well as several of the less common entities we have encountered. Thorough understanding of the appearance and location of the more specific masses should augment precise diagnosis in a majority of cases. In turn, this will eliminate unnecessary additional investigations and enable prompt and appropriate treatment. C1 PORTSMOUTH NAVAL MED CTR,DEPT RADIOL,PORTSMOUTH,HANTS,ENGLAND. EASTERN VIRGINIA MED SCH,DEPAUL MED CTR,NORFOLK,VA 23501. RP Butler, MG (reprint author), DEPT RADIOL,MED GRP 1,45 PINE ST,LANGLEY AFB,VA 23667, USA. NR 11 TC 9 Z9 9 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0364-2348 J9 SKELETAL RADIOL JI Skeletal Radiol. PD MAY PY 1996 VL 25 IS 4 BP 309 EP 317 PG 9 WC Orthopedics; Radiology, Nuclear Medicine & Medical Imaging SC Orthopedics; Radiology, Nuclear Medicine & Medical Imaging GA UK425 UT WOS:A1996UK42500001 PM 8737993 ER PT J AU Crittenden, JC Zhang, Y Hand, DW Perram, DL Marchand, EG AF Crittenden, JC Zhang, Y Hand, DW Perram, DL Marchand, EG TI Solar detoxification of fuel-contaminated groundwater using fixed-bed photocatalysts SO WATER ENVIRONMENT RESEARCH LA English DT Article DE benzene; detoxification; ethylbenzene; groundwater; photocatalysis; toluene; xylenes ID TITANIUM-DIOXIDE; TIO2 POWDER; WATER; DECOMPOSITION; DEGRADATION; DESTRUCTION; PHENOL AB A field test of a solar photocatalytic process for detoxification of water was conducted at Tyndall Air Force Base, Florida, where benzene, toluene, ethylbenzene, and xylene (BTEX) compounds were found in the fuel-contaminated groundwater. Platinized titanium dioxide supported on silica gel is packed in tubular photoreactors and used for single-pass operations. Catalyst fouling, destruction inhibition, and water pretreatment are investigated in addition to BTEX destruction. Ionic species were found to be primarily responsible for photocatalyst fouling and destruction inhibition. A simple pretreatment unit was developed for removing turbidity, adding oxidant, and ionic species. By using pretreatment, the reactor system operated efficiently, and no loss in catalyst photoactivity was found during the month-long test. On a rainy day, BTEX compounds of a total influent concentration of more than 2 mg/L were destroyed within 6.5 minutes of empty-bed contact time. Test results with various flow rates, reactor diameters, influent concentrations, solar irradiances, and weather conditions confirm the application potential of the process. C1 MICHIGAN TECHNOL UNIV,ENVIRONM ENGN CTR,HOUGHTON,MI 49931. ARMSTRONG LAB,TYNDALL AFB,FL. RP Crittenden, JC (reprint author), MICHIGAN TECHNOL UNIV,DEPT CIVIL & ENVIRONM ENGN,1400 TOWNSEND DR,HOUGHTON,MI 49931, USA. NR 26 TC 67 Z9 80 U1 1 U2 16 PU WATER ENVIRONMENT FEDERATION PI ALEXANDRIA PA 601 WYTHE ST, ALEXANDRIA, VA 22314-1994 SN 1061-4303 J9 WATER ENVIRON RES JI Water Environ. Res. PD MAY-JUN PY 1996 VL 68 IS 3 BP 270 EP 278 DI 10.2175/106143096X127703 PG 9 WC Engineering, Environmental; Environmental Sciences; Limnology; Water Resources SC Engineering; Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA UL538 UT WOS:A1996UL53800003 ER PT J AU Davis, JH AF Davis, JH TI Don't forget the U-2 SO AVIATION WEEK & SPACE TECHNOLOGY LA English DT Letter C1 US DEPT DEF,RECONNAISSANCE SYST DIV,INFO DOMINANCE DIRECTORATE,WASHINGTON,DC 20305. RP Davis, JH (reprint author), USAF,WASHINGTON,DC 20330, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MCGRAW HILL INC PI NEW YORK PA 1221 AVENUE OF THE AMERICAS, NEW YORK, NY 10020 SN 0005-2175 J9 AVIAT WEEK SPACE TEC JI Aviat. Week Space Technol. PD APR 29 PY 1996 VL 144 IS 18 BP 8 EP 8 PG 1 WC Engineering, Aerospace SC Engineering GA UG906 UT WOS:A1996UG90600012 ER PT J AU Gilman, JW Schlitzer, DS Lichtenhan, JD AF Gilman, JW Schlitzer, DS Lichtenhan, JD TI Low earth orbit resistant siloxane copolymers SO JOURNAL OF APPLIED POLYMER SCIENCE LA English DT Article AB Two classes of siloxane copolymers were evaluated for their resistance to the low earth orbit (LEO) environment. Poly(imide-siloxane) (PISX) copolymers were used as the resin for PISX-carbon fiber composites. These composites were exposed to the LEO environment, for 50 h, as part of the ''Effect of Oxygen Interaction with Materials'' (EOIM-III) experiment aboard the space shuttle STS-46. XPS analysis showed primarily silicon oxides on the LEO-exposed surfaces and evidence of a thermally accelerated oxidation. The results of simulated LEO exposure of the PISX composites show that they are one to two orders of magnitude more resistant than are homopolyimide-based composites. Furthermore, we found, surprisingly, that these materials erode slower when far-UV radiation is combined with the atomic oxygen. XPS analysis of PISX exposed only to far-UV allowed a partial mechanism to be proposed for the effect of far-UV radiation on the PISX copolymers. Polyhedral oligosilsequioxane (POSS)-siloxane copolymers were evaluated in a simulated LEO environment and results indicate that the POSS-siloxane copolymers are even more resistant to the simulated LEO environment than are the PISX copolymers; POSS-siloxanes actually gained weight during the exposure and healed the microcracks present. (C) 1996 John Wiley & Sons, Inc. RP Gilman, JW (reprint author), USAF,PHILLIPS LAB,ROCKET PROPULS DIRECTORATE,EDWARDS AFB,CA 93524, USA. NR 23 TC 117 Z9 118 U1 2 U2 13 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0021-8995 J9 J APPL POLYM SCI JI J. Appl. Polym. Sci. PD APR 25 PY 1996 VL 60 IS 4 BP 591 EP 596 DI 10.1002/(SICI)1097-4628(19960425)60:4<591::AID-APP12>3.0.CO;2-2 PG 6 WC Polymer Science SC Polymer Science GA UB529 UT WOS:A1996UB52900012 ER PT J AU Eaton, SS Kee, A Konda, R Eaton, GR Trulove, PC Carlin, RT AF Eaton, SS Kee, A Konda, R Eaton, GR Trulove, PC Carlin, RT TI Comparison of electron paramagnetic resonance line shapes and electron spin relaxation rates for C-60(-) and C-60(3-) in 4:1 toluene:acetonitrile and dimethyl sulfoxide SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID JAHN-TELLER DISTORTION; CARBON-ATOMS; SOLID-STATE; FULLERENE; EPR; ESR; BUCKMINSTERFULLERENE; SPECTROMETER; SOLVENTS; SPECTRA AB To assess the effect of solvent on the properties of C-60 anions, solutions of C-60(-) and C-60(3-) were generated electrochemically in 4:1 toluene:acetonitrile or DMSO containing 0.1 M tetrabutylammonium hexafluorophosphate. The anions were characterized by NIR spectroscopy and square-wave voltammetry. In both solvents continuous wave (CW) electron paramagnetic resonance (EPR) spectra at 8 K are axial for C-60(-) and rhombic for C-60(3-), consistent with increasing distortion of the anion with increasing addition of electrons to the LUMO of C-60. The line shapes in the wings of the spectra, decreasing anisotropy of the spectra with increasing temperature, faster phase memory relaxation rates in the wings of the spectra, and distribution of values of the spin-lattice relaxation rate (1/T-1) provide evidence for a distribution of Jahn-Teller distorted forms and increasing rates of interconversion between these forms with increasing temperature. These properties are similar in the two solvents, despite substantial differences in solvent polarity. Extrapolation of the temperature dependence of 1/T-1 measured below 30 K suggests that the line widths above 70 K are relaxation determined. Above about 70 K the line widths of the CW spectra broaden as increasing mobility of the solute/solvent increases the rate of spin-lattice relaxation. C1 USAF ACAD,FRANK J SEILER RES LAB,COLORADO SPRINGS,CO 80840. RP Eaton, SS (reprint author), UNIV DENVER,DEPT CHEM,DENVER,CO 80208, USA. OI Eaton, Gareth R/0000-0001-7429-8469; Eaton, Sandra S/0000-0002-2731-7986 NR 52 TC 29 Z9 29 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD APR 25 PY 1996 VL 100 IS 17 BP 6910 EP 6919 DI 10.1021/jp953220l PG 10 WC Chemistry, Physical SC Chemistry GA UG823 UT WOS:A1996UG82300008 ER PT J AU Banks, HT Inman, DJ Leo, DJ Wang, Y AF Banks, HT Inman, DJ Leo, DJ Wang, Y TI An experimentally validated damage detection theory in smart structures SO JOURNAL OF SOUND AND VIBRATION LA English DT Article ID BEAMS AB A method for the non-destructive detection and location of damage using parameterized partial differential equations and Galerkin approximation techniques is presented. Damages in a structure cause changes in the physical coefficients of mass density, elastic modulus and damping coefficients. This paper examines the use of beam like structures with piezoceramic sensors and actuators to perform identification of those physical parameters, and hence to detect the damage. The method casts the inverse problem as an optimization problem. The iterative method is based on enhanced least-square error minimization. Experimental results are presented from tests on cantilevered aluminum beams damaged at different locations and with damage of different dimensions. It is demonstrated that the method can sense the presence of damage, and locate and characterize the damage to a satisfactory precision. (C) 1996 Academic Press Limited C1 VIRGINIA POLYTECH INST & STATE UNIV,DEPT ENGN SCI & MECH,BLACKSBURG,VA 24060. CSA ENGN INC,PALO ALTO,CA 94303. OES,ARMSTRONG LAB,MATH PROD DIV,BROOKS AFB,TX 78258. RP Banks, HT (reprint author), N CAROLINA STATE UNIV,CTR RES SCI COMPUTAT,RALEIGH,NC 27695, USA. NR 22 TC 109 Z9 115 U1 0 U2 6 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-460X J9 J SOUND VIB JI J. Sound Vibr. PD APR 18 PY 1996 VL 191 IS 5 BP 859 EP 880 DI 10.1006/jsvi.1996.0160 PG 22 WC Acoustics; Engineering, Mechanical; Mechanics SC Acoustics; Engineering; Mechanics GA UF420 UT WOS:A1996UF42000014 ER PT J AU Tomlin, DW Bunning, TJ Price, GE Fratini, AV Adams, WW AF Tomlin, DW Bunning, TJ Price, GE Fratini, AV Adams, WW TI 1-(4-nitrophenyl)-4-piperidinol SO ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS LA English DT Article ID CRYSTALS AB The title compound, C11H14N2O3, is a non-linear optical chromophore, The piperidinol ring is in a chair conformation, The C-N-C fragment of the piperidinol moiety is nearly coplanar with the nitrophenyl ring system. The molecular stacking allows hydrogen bonding between the piperidinol hydroxy group and the nitro group. C1 SCI APPLICAT INT CORP,DAYTON,OH 45431. UNIV DAYTON,RES INST,DAYTON,OH 45469. UNIV DAYTON,DEPT CHEM,DAYTON,OH 45469. USAF,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. RP Tomlin, DW (reprint author), TECH MANAGEMENT CONCEPTS INC,POB 340345,BEAVERCREEK,OH 45434, USA. RI Adams, Wade/A-7305-2010 NR 14 TC 3 Z9 3 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-2701 J9 ACTA CRYSTALLOGR C JI Acta Crystallogr. Sect. C-Cryst. Struct. Commun. PD APR 15 PY 1996 VL 52 BP 1000 EP 1002 DI 10.1107/S0108270195014545 PN 4 PG 3 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA UK550 UT WOS:A1996UK55000096 ER PT J AU Nagpal, R Garscadden, A Clark, JD AF Nagpal, R Garscadden, A Clark, JD TI Electron impact vibrational excitation cross sections of SiF4 SO APPLIED PHYSICS LETTERS LA English DT Article ID DRIFT VELOCITIES; GAS-MIXTURES; DISSOCIATION; CF4 AB Electron drift velocities in mixtures of SiF4 and Ar have been measured using a pulsed-Townsend type drift tube. A set of vibrational excitation cross sections of electron scattering in SiF4 has been subsequently determined by the swarm analyses of measured transport data in highly dilute SiF4-Ar mixtures. The derived cross sections are consistent with the electron transport properties over an order of magnitude in SiF4 concentration in gas mixtures, thus providing evidence that the main features of their near threshold behavior, and of their absolute magnitude have been captured. (C) 1996 American Institute of Physics. C1 WRIGHT STATE UNIV,DEPT PHYS,DAYTON,OH 45435. RP Nagpal, R (reprint author), USAF,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433, USA. NR 18 TC 4 Z9 4 U1 1 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 15 PY 1996 VL 68 IS 16 BP 2189 EP 2191 DI 10.1063/1.116008 PG 3 WC Physics, Applied SC Physics GA UE761 UT WOS:A1996UE76100007 ER PT J AU How, H Fang, TM Lu, F Ahern, B AF How, H Fang, TM Lu, F Ahern, B TI Hall-effect characterization in semiconductor heterostructure junctions using polarized laser signal SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 40th Annual Conference on Magnetism and Magnetic Materials CY NOV 06-09, 1995 CL PHILADELPHIA, PA SP Amer Inst Phys, IEEE, Magnet Soc, Minerals Met & Mat Soc, Amer Soc Testing & Mat, USN, Off Naval Res, Amer Ceram Soc AB We describe a new technique which exploits the ac Hall effect in the characterization of layered semiconductor structures. The method employs laser signals in the presence of a de magnetic bias field. Upon incidence the polarization of the optical signal is rotated via a Lorentz force due to the ac Hall effect. As such, the reflected waves carry information on the Hall mobility of the charge carriers. The calculations show that ac Hall reflection warrants sufficient intensity to be measured. Our theory is complete in the sense that depth profiling has been explicitly incorporated in the formulation. (C) 1996 American Institute of Physics. C1 USAF,ROME LAB,RL ERXE,BEDFORD,MA 01731. RP How, H (reprint author), MASSACHUSETTS TECHNOL LAB,BELMONT,MA 02178, USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD APR 15 PY 1996 VL 79 IS 8 BP 4759 EP 4761 DI 10.1063/1.361663 PN 2A PG 3 WC Physics, Applied SC Physics GA UG877 UT WOS:A1996UG87700101 ER PT J AU Gorbounova, O Ding, YJ Khurgin, JB Lee, SJ Craig, AE AF Gorbounova, O Ding, YJ Khurgin, JB Lee, SJ Craig, AE TI Optical frequency shifters based on cascaded second-order nonlinear processes SO OPTICS LETTERS LA English DT Article ID WAVELENGTH CONVERSION; LASER AB We propose a novel scheme for an optical frequency shifter that exploits cascaded second-order nonlinearity in a semiconductor material. The cascade comprises a sum-frequency interaction followed by a difference-frequency conversion in a coupled waveguide-to-vertical-cavity structure. For a 50-mu m-long planar waveguide, efficient conversion is supported over an effective -3-dB bandwidth of 39 nm at a pump power density of 3.3 W/mu m. A longitudinal in-plane cavity can reduce the required pump power density so that effective conversion occurs over a bandwidth of 20 nm at a pump power density of 6 mW/mu m. (C) 1996 Optical Society of America. C1 JOHNS HOPKINS UNIV,DEPT ELECT & COMP ENGN,BALTIMORE,MD 21218. USAF,OFF SCI RES,WASHINGTON,DC 20332. RP Gorbounova, O (reprint author), BOWLING GREEN STATE UNIV,CTR MAT & PHOTOCHEM SCI,DEPT PHYS & ASTRON,BOWLING GREEN,OH 43403, USA. RI khurgin, Jacob/A-3278-2010 NR 15 TC 12 Z9 12 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD APR 15 PY 1996 VL 21 IS 8 BP 558 EP 560 DI 10.1364/OL.21.000558 PG 3 WC Optics SC Optics GA UE617 UT WOS:A1996UE61700004 PM 19876082 ER PT J AU Roggemann, MC AF Roggemann, MC TI Photon-noise limits to the detection of the closure phase in optical interferometry SO APPLIED OPTICS LA English DT Article AB Michelson stellar interferometers with long baselines have been proposed as a means for obtaining high-resolution images of space objects. The fringes measured in such interferometers move randomly owing to atmospheric turbulence effects. For overcoming turbulence effects the hinge phase at any instant is summed around groups of three or more aperture pairs to create the so-called closure phase. The closure phase is insensitive to atmospheric turbulence effects; however, it is corrupted by photon-noise effects. The probability-density function of the error in the closure-phase estimate that is due to photon noise is derived as a function of the fringe visibility and is evaluated. It is shown that, for dim objects and low hinge visibility, several hundred to several thousand independent realizations of the closure phase must be averaged to obtain acceptable closure-phase variance. RP Roggemann, MC (reprint author), USAF,INST TECHNOL,DEPT ENGN PHYS,GRAD SCH ENGN,2950 P ST,WRIGHT PATTERSON AFB,OH 45433, USA. NR 7 TC 4 Z9 4 U1 1 U2 2 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD APR 10 PY 1996 VL 35 IS 11 BP 1809 EP 1814 DI 10.1364/AO.35.001809 PG 6 WC Optics SC Optics GA UD301 UT WOS:A1996UD30100001 PM 21085304 ER PT J AU Lindsley, NJ Medzorian, JP Lay, MK Macy, WW AF Lindsley, NJ Medzorian, JP Lay, MK Macy, WW TI Tire footprint behavior during dynamometer testing SO AEROSPACE ENGINEERING LA English DT Article C1 MCDONNELL DOUGLAS CORP,AEROSP,ST LOUIS,MO 63166. RP Lindsley, NJ (reprint author), USAF,WRIGHT LAB,FIVMA,WRIGHT PATTERSON AFB,OH 45433, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC AUTOMOTIVE ENG INC PI WARRENDALE PA 400 COMMONWEALTH DRIVE, WARRENDALE, PA 15096 SN 0736-2536 J9 AEROSPACE ENG JI Aerosp. Eng. PD APR PY 1996 VL 16 IS 4 BP 11 EP 14 PG 4 WC Engineering, Aerospace SC Engineering GA UG192 UT WOS:A1996UG19200003 ER PT J AU Gaitonde, D Shang, JS Edwards, JR AF Gaitonde, D Shang, JS Edwards, JR TI Performance of eddy-viscosity-based turbulence models in three-dimensional turbulent interaction SO AIAA JOURNAL LA English DT Article C1 N CAROLINA STATE UNIV,DEPT MECH & AEROSP ENGN,RALEIGH,NC 27695. RP Gaitonde, D (reprint author), USAF,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433, USA. NR 14 TC 0 Z9 1 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0001-1452 J9 AIAA J JI AIAA J. PD APR PY 1996 VL 34 IS 4 BP 844 EP 847 DI 10.2514/3.13149 PG 4 WC Engineering, Aerospace SC Engineering GA UC611 UT WOS:A1996UC61100027 ER PT J AU Abadi, J AF Abadi, J TI Israel and the peace process, 1977-1982: In search of legitimacy for peace - BarSimanTov,Y SO AMERICAN HISTORICAL REVIEW LA English DT Book Review RP Abadi, J (reprint author), USAF ACAD,COLORADO SPRINGS,CO 80840, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER HISTORICAL REVIEW PI WASHINGTON PA 400 A ST SE, WASHINGTON, DC 20003 SN 0002-8762 J9 AM HIST REV JI Am. Hist. Rev. PD APR PY 1996 VL 101 IS 2 BP 533 EP 534 DI 10.2307/2170518 PG 2 WC History SC History GA UF739 UT WOS:A1996UF73900130 ER PT J AU Dupuis, RE Cooper, AA Rosamond, LJ CampbellBright, S AF Dupuis, RE Cooper, AA Rosamond, LJ CampbellBright, S TI Multiple delayed peak lithium concentrations following acute intoxication with an extended-release product SO ANNALS OF PHARMACOTHERAPY LA English DT Article ID CARBONATE; HEMODIALYSIS; FLUOXETINE; TOXICITY AB OBJECTIVE: To describe delayed peak lithium concentrations after an overdose of extended-release lithium tablets. CASE SUMMARY: A patient with borderline personality disorder and depression ingested extended-release lithium approximately 20.25 g along with other agents. At presentation, the lithium concentration was 1.4 mEq/L. Significant enteral intake was initiated 27 hours after presentation and the lithium concentration 5 hours later increased to 3.2 mEq/L. A second lithium peak concentration of 5.0 mEq/L was noted 40 hours after presentation. Two hemodialysis sessions lasting 4 hours each were performed along with administration of sodium polystyrene sulfonate in sorbitol 20% to enhance lithium elimination and decrease absorption. Eighty-eight hours after presentation, the lithium concentration had decreased to 1.5 mEq/L. DISCUSSION: Delayed and secondary peak lithium concentrations have been reported following an overdose with an extended-release product. Extended-release lithium may form an aggregate in the gastrointestinal tract and/or have delayed absorption secondary to coingested drugs. Toxicity may result if the patient begins enteral intake of drugs, fluids, or nutrition. CONCLUSIONS: Continued monitoring of lithium concentrations after an acute ingestion with an extended-release product are recommended until lithium concentrations are less than 1.5 mEq/L and there are no signs of toxicity, particularly once the patient begins significant enteral intake. C1 UNIV N CAROLINA HOSP,DEPT PHARM,CHAPEL HILL,NC 27514. UNIV N CAROLINA,DIV PHARM PRACTICE,CHAPEL HILL,NC. USAF,CLIN PHARM SERV,TRAVIS AFB,CA. UNIV N CAROLINA,SCH PHARM,CHAPEL HILL,NC. NR 18 TC 18 Z9 18 U1 0 U2 0 PU HARVEY WHITNEY BOOKS CO PI CINCINNATI PA PO BOX 42696, CINCINNATI, OH 45242 SN 1060-0280 J9 ANN PHARMACOTHER JI Ann. Pharmacother. PD APR PY 1996 VL 30 IS 4 BP 356 EP 359 PG 4 WC Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA UE201 UT WOS:A1996UE20100006 PM 8729888 ER PT J AU Jenny, JR Skowronski, J Mitchel, WC Hobgood, HM Glass, RC Augustine, G Hopkins, RH AF Jenny, JR Skowronski, J Mitchel, WC Hobgood, HM Glass, RC Augustine, G Hopkins, RH TI Deep level transient spectroscopic and Hall effect investigation of the position of the vanadium acceptor level in 4H and 6H SiC SO APPLIED PHYSICS LETTERS LA English DT Article ID IMPURITIES; SILICON AB Hall effect, deep level transient spectroscopy (DLTS) and optical absorption measurements were employed in concert to determine the position of the vanadium acceptor level in vanadium and nitrogen doped 6H and 4H SiC. Hall effect results indicate that the acceptor position in 4H SiC is at 0.80 eV beneath the conduction band edge, and 0.66 eV for the 6H polytype. The DLTS signature of the defect in the 4H polytype showed an ionization energy of 0.80 eV and a capture cross section of 1.8 X 10(-16) cm(-2). The optical absorption measurements proved that the levels investigated are related to isolated vanadium, and therefore the vanadium acceptor level. Based on the DLTS measurements and secondary ion mass spectroscopy data, the maximum solubility of vanadium in SiC was determined to be 3.0 X 10(17) cm(-3). At these incorporation limits and with the depth of the level, the vanadium acceptor level could be used in the creation of semi-insulating silicon carbide. (C) 1996 American Institute of Physics. C1 WRIGHT LAB,MLPO,WRIGHT PATTERSON AFB,OH 45433. WESTINGHOUSE SCI & TECHNOL CTR,PITTSBURGH,PA 15235. RP Jenny, JR (reprint author), CARNEGIE MELLON UNIV,DEPT MAT SCI & ENGN,PITTSBURGH,PA 15213, USA. NR 10 TC 67 Z9 70 U1 3 U2 19 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 1 PY 1996 VL 68 IS 14 BP 1963 EP 1965 DI 10.1063/1.115640 PG 3 WC Physics, Applied SC Physics GA UC483 UT WOS:A1996UC48300028 ER PT J AU John, G Zabinski, JS Gupta, VK AF John, G Zabinski, JS Gupta, VK TI Corrosion of iron by a perfluoropolyalkylether identified by Mossbauer spectroscopy SO APPLIED SURFACE SCIENCE LA English DT Article ID DEGRADATION; LUBRICANTS; MOLECULES; SURFACES; FLUIDS; OXIDE AB Mossbauer spectroscopy was used to identify the corrosion products produced when various samples of pure iron were heated in a branched perfluoropolyalkylether (PFPAE) at temperatures between 232 degrees C and 343 degrees C (450 degrees F and 650 degrees F). The samples that were treated are: (1) a 2 mm thick piece of 99.99% pure natural iron, (2) a 567 Angstrom film of iron enriched in Fe-57 evaporated onto 1018 steel, and (3) powdered iron, The predominant products produced for treatments of 24 to 50 h at 288 degrees C, 316 degrees C, and 343 degrees C, and with minimal oxygen present, an FeF2, and Fe3O4 modified by the substitution of fluorine for oxygen at the Fe2+ site (site B). A treatment at 232 degrees C for 25 h did not produce any FeF2 but did show some sites in the spectrum that may be fluorides or oxyfluorides in addition to the modified Fe3O4. For the seven day treatment at 232 degrees C FeF2 is observed. When powdered iron was treated at 343 degrees C in a vessel where oxygen was introduced, FeF3, FeF2, and the Fe3+ site (site A) of Fe3O4 with little or no site B were observed, These results suggest that the formation of FeF3, which catalyzes the decomposition of PFPAE fluids, involves the production and fluorination of Fe3O4. C1 MLBT,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. CENT STATE UNIV,DEPT CHEM,WILBERFORCE,OH 45387. RP John, G (reprint author), USAF,INST TECHNOL,DEPT ENGN PHYS,ENP,2950 P ST,WRIGHT PATTERSON AFB,OH 45433, USA. NR 21 TC 6 Z9 6 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD APR PY 1996 VL 93 IS 4 BP 329 EP 337 DI 10.1016/0169-4332(95)00335-5 PG 9 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA UL345 UT WOS:A1996UL34500006 ER PT J AU Bhowmick, SK LimCo, RY Beals, DA Martineau, DS AF Bhowmick, SK LimCo, RY Beals, DA Martineau, DS TI Pathological case of the month - Primary hyperparathyroidism SO ARCHIVES OF PEDIATRICS & ADOLESCENT MEDICINE LA English DT Article ID CHILDREN RP Bhowmick, SK (reprint author), USAF,MED CTR,MED GRP 81ST,DEPT PEDIAT,301 FISHER ST,SUITE 102,KEESLER AFB,MI 39534, USA. NR 8 TC 5 Z9 5 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 1072-4710 J9 ARCH PEDIAT ADOL MED JI Arch. Pediatr. Adolesc. Med. PD APR PY 1996 VL 150 IS 4 BP 431 EP 432 PG 2 WC Pediatrics SC Pediatrics GA UD070 UT WOS:A1996UD07000017 PM 8634742 ER PT J AU Dennis, RJ Tredici, TJ Ivan, DJ Jackson, WG AF Dennis, RJ Tredici, TJ Ivan, DJ Jackson, WG TI The USAF aircrew medical contact lens study group: Operational problems SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID WEAR; AVIATORS AB Background: Although soft contact lens (SCL) wear for aircrew with refractive errors was approved in lune 1989, aircrew with certain ocular disorders, such as keratoconus, have been waivered to fly with contact lenses (CL) since the 1960's. These aircrew are members of the United States Air Force (USAF) Medical Contact Lens Study Group and are fitted [with SCL's or hard contact lenses (HCL)] and followed by the Ophthalmology Branch at Armstrong Laboratory; Brooks Air Force Base, TX. Because HCL's are perceived to be more susceptible to a disabling foreign body (FB) under a lens and are more difficult to remove in flight, Study Group aircrew are the only USAF HCL wearers allowed to fly Methods: The medical records of the 142 aircrew members followed for CL wear between 1970 and 1993 were retrospectively examined to determine the type of CL worn, crew position, and the medical reason for CL wear. The Study Group was then surveyed to ascertain whether there were any significant operational problems for aircrew wearing medically indicated CL's. Aircrew were divided into HCL (51 surveys returned) and SCL (44 surveys returned) wearers to compare each modality's efficacy in the flight environment. Results: HCL wearers were more likely than SCL wearers to have endured at least one FB incursion under a lens during flight (p = 0.053). HCL wearers were also more likely to have had a lens come off-center at least once in their careers during flight (p = 0.035). Both groups reported problems with CL dryness in the 5-15% relative humidity of the cockpit. Only four aircrew reported any CL-related Duties Not Involving Flying (DNIF) days during their careers. Conclusion: Because HCL's are necessary to correct vision adequately to return aircrew with keratoconus and other corneal anomalies to the cockpit, the USAF needs to continue to investigate the use of rigid gas-permeable HCL's with aircrew. RP Dennis, RJ (reprint author), ARMSTRONG LAB,AEROSP MED DIRECTORATE,DIV CLIN SCI,OPHTHALMOL BRANCH,AL-AOCOP,2507 KENNEDY CIRCLE,BROOKS AFB,TX 78235, USA. NR 17 TC 3 Z9 7 U1 0 U2 0 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD APR PY 1996 VL 67 IS 4 BP 303 EP 307 PG 5 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA UB528 UT WOS:A1996UB52800001 PM 8900979 ER PT J AU Fox, KA Rudge, FW AF Fox, KA Rudge, FW TI Autosomal dominant polycystic kidney disease and hypertension in the aviator SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID INTRACRANIAL ANEURYSMS; DIAGNOSIS; CYSTS AB Autosomal dominant polycystic kidney disease is a relatively common familial disorder which frequently affects multiple organ systems. The condition is associated with hypertension, cardiac valvular abnormalities, cerebral berry aneurysms, and chronic renal failure. We describe an aviator with a long history of hypertension that was round to be due to autosomal dominant polycystic kidney disease. Following an extensive evaluation, he was found capable of continuation of flying duties. The epidemiology, pathogenesis, diagnosis, evaluation, and aeromedical implications of autosomal dominant polycystic kidney disease in an aviator are discussed. C1 USAF,SCH AEROSP MED,AF,BROOKS AFB,TX 78235. NR 25 TC 1 Z9 1 U1 0 U2 0 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD APR PY 1996 VL 67 IS 4 BP 376 EP 378 PG 3 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA UB528 UT WOS:A1996UB52800015 PM 8900993 ER PT J AU Menkes, DL Hood, DC AF Menkes, DL Hood, DC TI Guillain-Barre syndrome in northern China. The spectrum of neuropathological changes in clinically defined cases SO BRAIN LA English DT Letter ID CONDUCTION BLOCK; STIMULATION RP Menkes, DL (reprint author), USAF,DEPT AIR FORCE,NEUROPHYSIOL LAB,DAVID GRANT MED CTR,MED GRP 60,MC FS,TRAVIS AFB,CA 94535, USA. NR 10 TC 4 Z9 4 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0006-8950 J9 BRAIN JI Brain PD APR PY 1996 VL 119 BP 676 EP 677 DI 10.1093/brain/119.2.676 PN 2 PG 2 WC Clinical Neurology; Neurosciences SC Neurosciences & Neurology GA UN423 UT WOS:A1996UN42300028 PM 8800957 ER PT J AU Baird, RC Johari, H Jumper, GY AF Baird, RC Johari, H Jumper, GY TI Numerical simulation of environmental modulation of chemical signal structure and odor dispersal in the open ocean SO CHEMICAL SENSES LA English DT Article ID LIFE; PHEROMONE; DIFFUSION; PLUMES; MODEL AB Hydrodynamic models were used to simulate the dispersal of a model fish pheromone at three characteristic depth regimes (mixed layer, and 300 and 1000 m) of broad extent in the open ocean at the scale of individual organisms. The models were calibrated to experimental studies of dye dispersal at these depths and the goldfish pheromone system was used as the model odorant. There are profound differences in the time course and geometry of dispersing odor fields with depth. Below the thermocline odor fields spread primarily as horizontal patches with dispersal rates about five times slower at 1000 m as compared to 300 m. In the mixed layer, odors disperse rapidly in all directions and the maximum radial distance of spread of a physiologically active odor patch is less than half of the deep water value. Increases in the threshold sensitivity of olfactory receptors can greatly increase effective odor field size. Chemical signals impact the encounter dynamics among oceanic organisms by affecting the distance at which the target (emitting) individual is perceived. Perception distances due to olfactory cues can be significantly greater than for other senses in pelagic oceanic environments. Environment specific modulation of odor fields then affects the signal properties and therefore utility of chemoreception that, in turn, bear on encounter probabilities and transfer functions in oceanic ecosystems. C1 WORCESTER POLYTECH INST,DEPT BIOL & BIOTECHNOL,WORCESTER,MA 01609. WORCESTER POLYTECH INST,DEPT ENGN MECH,WORCESTER,MA 01609. USAF,PHILLIPS LAB,AEROSP ENGN DIV,BEDFORD,MA 01731. NR 55 TC 8 Z9 8 U1 0 U2 2 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0379-864X J9 CHEM SENSES JI Chem. Senses PD APR PY 1996 VL 21 IS 2 BP 121 EP 134 DI 10.1093/chemse/21.2.121 PG 14 WC Behavioral Sciences; Food Science & Technology; Neurosciences; Physiology SC Behavioral Sciences; Food Science & Technology; Neurosciences & Neurology; Physiology GA UJ544 UT WOS:A1996UJ54400002 PM 8670691 ER PT J AU Harville, DL AF Harville, DL TI Ability test equity in predicting job performance work samples SO EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT LA English DT Article ID BIAS AB There has been a lack of work sample job performance criteria to support the usage of ability tests for personnel selection. Work samples of performance were collected for three air force jobs. Differences in slopes and intercepts on the basis of race and sex were tested for the regressions of work sample scores on Armed Forces Qualification Test scores. This ability test was found to be fair to Blacks, Whites, males, and females for all three jobs using Cleary's definition of test bias. RP Harville, DL (reprint author), ARMSTRONG LAB,HUMAN RESOURCES DIRECTORATE,7909 LINDBERGH DR,BROOKS AFB,TX 78235, USA. NR 6 TC 6 Z9 6 U1 1 U2 3 PU SAGE SCIENCE PRESS PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 SN 0013-1644 J9 EDUC PSYCHOL MEAS JI Educ. Psychol. Meas. PD APR PY 1996 VL 56 IS 2 BP 344 EP 348 DI 10.1177/0013164496056002015 PG 5 WC Psychology, Educational; Mathematics, Interdisciplinary Applications; Psychology, Mathematical SC Psychology; Mathematics GA UC540 UT WOS:A1996UC54000015 ER PT J AU Marciante, JR Agrawal, GP AF Marciante, JR Agrawal, GP TI Nonlinear mechanisms of filamentation in broad-area semiconductor lasers SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article ID OPTICAL AMPLIFIERS; INDEX; GEOMETRY AB There are three nonlinear mechanisms that can lead to filamentation in broad-area semiconductor lasers: gain-saturation-induced changes in the refractive index through the linewidth-enhancement factor, self-focusing due to heat-induced index changes, and self-defocusing through intensity-dependent index changes in the cladding layer, We present a theoretical model to analyze these mechanisms and their relative roles in destabilizing the laser output, We find that there exists a critical value for the linewidth-enhancement factor below which broad-area lasers are stable for wide stripe widths (as wide as 250 mu m) and high pumping levels (as high as 20 times threshold), We also find that broad-area lasers are less susceptible to filamentation through self-defocusing and show how an intensity-dependent index in the cladding layer may be used to suppress filamentation caused by the linewidth-enhancement factor. C1 USAF,PHILLIPS LAB,SEMICOND LASER BRANCH,KIRTLAND AFB,NM 87117. RP Marciante, JR (reprint author), UNIV ROCHESTER,INST OPT,ROCHESTER,NY 14627, USA. RI Agrawal, Govind/D-5380-2013 OI Agrawal, Govind/0000-0003-4486-8533 NR 23 TC 143 Z9 143 U1 4 U2 12 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9197 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD APR PY 1996 VL 32 IS 4 BP 590 EP 596 DI 10.1109/3.488831 PG 7 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA UE484 UT WOS:A1996UE48400002 ER PT J AU Hammer, DX Thomas, RJ Noojin, GD Rockwell, BA Kennedy, PK Roach, WP AF Hammer, DX Thomas, RJ Noojin, GD Rockwell, BA Kennedy, PK Roach, WP TI Experimental investigation of ultrashort pulse laser-induced breakdown thresholds in aqueous media SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article ID WATER; WIDTH AB Laser-induced breakdown (LIB) thresholds are determined for pulse durations of 2.4 ps, 400 fs, and 100 fs at 580 nm in high purity water, saline and tap water, The dependence of LIB irradiance thresholds on pulse duration, optical wavelength, and focal volume is examined, and the experimental data obtained is compared with a theoretical model, The slopes of the probability curves calculated are compared with mechanisms for LIB, namely avalanche ionization, multiphoton initiated avalanche ionization, and multiphoton ionization, Lastly, the dependence of the peak breakdown electric field on pulse duration and focal volume is empirically determined and compared with previous work. C1 TASC INC,SAN ANTONIO,TX 78215. RP Hammer, DX (reprint author), ARMSTRONG LAB,BROOKS AFB,TX 78235, USA. NR 32 TC 69 Z9 71 U1 0 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9197 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD APR PY 1996 VL 32 IS 4 BP 670 EP 678 DI 10.1109/3.488842 PG 9 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA UE484 UT WOS:A1996UE48400013 ER PT J AU Li, JA Zelnio, EG AF Li, JA Zelnio, EG TI Target detection with synthetic aperture radar SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS LA English DT Article AB Target detection with synthetic aperture radar (SAR) is considered. We derive generalized likelihood ratio (GLR) detection algorithms that may be used with SAR images that are obtained with coherent subtraction or have Gaussian distributions. We analytically compare the performance of 1) a single pixel detector, 2) a detector using complete knowledge of the target signature information and known orientation information, 3) a detector using incomplete knowledge of the target signature information and known orientation information, 4) a detector using unknown target signature information and known orientation information, and 5) a detector using unknown target signature information and unknown orientation information. C1 WRIGHT LAB,TARGET RECOGNIT TECHNOL BRANCH,WRIGHT PATTERSON AFB,OH 45433. RP Li, JA (reprint author), UNIV FLORIDA,DEPT ELECT ENGN,405 CSE,GAINESVILLE,FL 32611, USA. NR 12 TC 16 Z9 20 U1 1 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9251 J9 IEEE T AERO ELEC SYS JI IEEE Trans. Aerosp. Electron. Syst. PD APR PY 1996 VL 32 IS 2 BP 613 EP 627 DI 10.1109/7.489506 PG 15 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA UG109 UT WOS:A1996UG10900012 ER PT J AU Burns, TJ Rogers, SK Oxley, ME Ruck, DW AF Burns, TJ Rogers, SK Oxley, ME Ruck, DW TI A wavelet multiresolution analysis for spatio-temporal signals SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS LA English DT Article AB The wavelet filters of the conventional 3D multiresolution analysis possess homogeneous spatial and temporal frequency characteristics which Limits one's ability to match filter frequency characteristics to signal frequency behavior. Also, the conventional 3D multiresolution analysis employs an oct-tree decomposition structure which restricts the analysis of signal details to identical resolutions in space and time. This paper presents a 3D wavelet multiresolution analysis constructed from nonhomogeneous spatial and temporal filters, and an orthogonal sub-band coding scheme that decouples the spatial and temporal decomposition processes. RP Burns, TJ (reprint author), USAF, INST TECHNOL, BLDG 60, RM 218, 2950 P ST, WRIGHT PATTERSON AFB, OH 45433 USA. NR 28 TC 7 Z9 8 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9251 J9 IEEE T AERO ELEC SYS JI IEEE Trans. Aerosp. Electron. Syst. PD APR PY 1996 VL 32 IS 2 BP 628 EP 649 DI 10.1109/7.489507 PG 22 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA UG109 UT WOS:A1996UG10900013 ER PT J AU Stright, JR Rogers, SK Quinn, DW Fielding, KH AF Stright, JR Rogers, SK Quinn, DW Fielding, KH TI An application of embedology to spatio-temporal pattern recognition SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS LA English DT Article AB The theory of embedded time series is shown applicable for determining a reasonable lower bound on the length of test sequence required for accurate classification of moving objects. Sequentially recorded feature vectors of a moving object form a training trajectory in feature space. Each of the sequences of feature vector components is a time series, and under certain conditions, each of these time series has approximately the same fractal dimension. The embedding theorem may be applied to this fractal dimension to establish a sufficient number of observations to determine the feature space trajectory of the object It is argued that this number is a reasonable lower bound on test sequence length for use in object classification. Experiments with data corresponding to five military vehicles (observed following a projected Lorenz trajectory on a viewing sphere) show that this bound is indeed adequate. C1 DEPT MATH & STAT,WRIGHT PATTERSON AFB,OH 45433. RP Stright, JR (reprint author), USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,2950 P ST,WRIGHT PATTERSON AFB,OH 45433, USA. NR 11 TC 2 Z9 2 U1 3 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9251 J9 IEEE T AERO ELEC SYS JI IEEE Trans. Aerosp. Electron. Syst. PD APR PY 1996 VL 32 IS 2 BP 768 EP 774 DI 10.1109/7.489519 PG 7 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA UG109 UT WOS:A1996UG10900025 ER PT J AU Pyati, VP AF Pyati, VP TI On the use of rho-algorithm in series acceleration - Comment SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION LA English DT Letter RP Pyati, VP (reprint author), USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433, USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-926X J9 IEEE T ANTENN PROPAG JI IEEE Trans. Antennas Propag. PD APR PY 1996 VL 44 IS 4 BP 590 EP 590 DI 10.1109/8.489313 PG 1 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA UD858 UT WOS:A1996UD85800021 ER PT J AU Southall, HL Simmers, JA ODonnell, TH AF Southall, HL Simmers, JA ODonnell, TH TI Direction finding in phased arrays with a neural network beamformer (vol 43, pg 1369, 1995) SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION LA English DT Correction, Addition C1 ARCON CORP,WALTHAM,MA 02154. RP Southall, HL (reprint author), USAF,ROME LAB,ELECTROMAGNET & RELIABIL DIRECTORATE,HANSON AFB,MA 01731, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-926X J9 IEEE T ANTENN PROPAG JI IEEE Trans. Antennas Propag. PD APR PY 1996 VL 44 IS 4 BP 590 EP 590 PG 1 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA UD858 UT WOS:A1996UD85800022 ER PT J AU Frederickson, AR AF Frederickson, AR TI Upsets related to spacecraft charging SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article ID ELECTROSTATIC DISCHARGES; ELECTRICAL DISCHARGES; SURFACES; DIELECTRICS; MODELS; VACUUM; CRRES; ENVIRONMENT; BREAKDOWN AB The charging of spacecraft components by high energy radiation can result in spontaneous pulsed discharges, The pulses can interrupt normal operations of spacecraft electronics. The 20-year history of ground studies and spacecraft studies of this phenomenon are reviewed, The data from space are not sufficient to unambiguously point to a few specific solutions. The ground based data continue to find more problem areas the longer one looks, As spacecraft become more complex and carry less radiation shielding, the charging and discharging of insulators is becoming a more critical problem area. Ground experiments indicate that solutions for spacecraft are multiple and diverse, and many technical details are reviewed or introduced here. RP Frederickson, AR (reprint author), USAF,PHILLIPS LAB,BEDFORD,MA 01731, USA. NR 93 TC 61 Z9 63 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD APR PY 1996 VL 43 IS 2 BP 426 EP 441 DI 10.1109/23.490891 PN 1 PG 16 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA UJ077 UT WOS:A1996UJ07700009 ER PT J AU Gerardi, DT Trivedi, HK Rosado, L AF Gerardi, DT Trivedi, HK Rosado, L TI Evaluation of fatigue and wear characteristics of M50 steel using MIL-L-7808K SO INTERNATIONAL JOURNAL OF FATIGUE LA English DT Article DE rolling contact fatigue; specific film thickness; boundary lubrication; wear volume AB The fatigue and wear characteristics of AISI VIM-VAR M50 steel were evaluated using a fully formulated polyolester based lubricant conforming to MIL-L-7808K (4 cSt at 100 degrees C) specification. Tests were conducted using a rolling contact fatigue test rig of the ball-on-rod type at a cyclic maximum Hertzian stress level of 4.8 GPa (700 Ksi) and temperatures of 23 degrees and 177 degrees C. Rolling contact fatigue life results were compared with a fully formulated polyolester conforming to the MIL-L-7808J (3.2 cSt at 100 degrees C) specification. The results suggest that rolling contact fatigue life and wear volume per stress cycle in the boundary lubrication regime are affected by lubricant type and temperature. MIL-L-7808K exhibited statistically significant superior fatigue life and lower wear rate at both temperatures when compared to Mn-L-7808J. Also, there was some correlation found between wear and fatigue life. A separate set of tests were conducted to measure rolling contact friction. Of the two lubricants evaluated, MIL-L-7808J showed the lowest average rolling contact friction. C1 USAF,AERO PROPULS & POWER DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. RP Gerardi, DT (reprint author), UNIVERSAL ENERGY SYST INC,4401 DAYTON XENIA RD,DAYTON,OH 45432, USA. NR 10 TC 2 Z9 2 U1 0 U2 1 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0142-1123 J9 INT J FATIGUE JI Int. J. Fatigue PD APR PY 1996 VL 18 IS 3 BP 191 EP 196 DI 10.1016/0142-1123(96)00097-7 PG 6 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA UP466 UT WOS:A1996UP46600004 ER PT J AU Guide, VDR AF Guide, VDR TI Scheduling using drum-buffer-rope in a remanufacturing environment SO INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH LA English DT Article AB Scheduling in a remanufacturing environment is more complex and the scheduler must deal with more uncertainty than in a traditional manufacturing environment. In order to properly schedule in a remanufacturing environment the schedule must be able to cope with several complicating factors which increase variability. The schedule must be able to cope with conditional routeings, a routeing that may or may not be taken due to the condition of the unit. The schedule must also be able to cope with dependent events, e.g. operation B cannot begin until operation A is completed. Drum-buffer-rope (DBR) offers an extremely robust method of scheduling. A schedule built using DBR can take both conditional routeings and dependent events into account. A realistic example from a military depot is discussed in detail and each step required to build a schedule using DBR is explained fully. This paper also shows the results from a simulation model of DBR at a repair/rework depot which are benchmarked against the present production planning and control system. RP USAF, INST TECHNOL, GRAD SCH LOGIST & ACQUISIT MANAGEMENT, DEPT GRAD LOGIST MANAGEMENT, WRIGHT PATTERSON AFB, OH 45433 USA. NR 10 TC 51 Z9 53 U1 1 U2 13 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND SN 0020-7543 EI 1366-588X J9 INT J PROD RES JI Int. J. Prod. Res. PD APR PY 1996 VL 34 IS 4 BP 1081 EP 1091 DI 10.1080/00207549608904951 PG 11 WC Engineering, Industrial; Engineering, Manufacturing; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA UD386 UT WOS:A1996UD38600010 ER PT J AU Pai, PF Palazotto, AN AF Pai, PF Palazotto, AN TI Large-deformation analysis of flexible beams SO INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES LA English DT Article ID LARGE DEFLECTIONS; COMPOSITE BEAMS AB Presented here are numerical verifications of a geometrically-exact curved beam model which fully accounts for large rotations, large displacements, initial curvatures and extensionality. A multiple shooting method is used to solve the two-point boundary-value problem of flexible beams undergoing large elastic rotations and displacements in three-dimensional space. Numerically exact large static deformations of eight beams subjected to different loading and/or boundary conditions are obtained. These solutions can be used to verify the performance of general finite-element codes in analyzing large structural deformations. C1 USAF, INST TECHNOL, DEPT AERONAUT & ASTRONAUT, DAYTON, OH 45433 USA. RP N CAROLINA AGR & TECH STATE UNIV, DEPT MECH ENGN, GREENSBORO, NC 27411 USA. NR 37 TC 53 Z9 56 U1 0 U2 16 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0020-7683 EI 1879-2146 J9 INT J SOLIDS STRUCT JI Int. J. Solids Struct. PD APR PY 1996 VL 33 IS 9 BP 1335 EP 1353 DI 10.1016/0020-7683(95)00090-9 PG 19 WC Mechanics SC Mechanics GA TT729 UT WOS:A1996TT72900008 ER PT J AU Pai, PF Palazotto, AN AF Pai, PF Palazotto, AN TI Authors' closure SO INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES LA English DT Letter C1 USAF,INST TECHNOL,DEPT AERONAUT & ASTRONAUT,DAYTON,OH 45433. RP Pai, PF (reprint author), N CAROLINA AGR & TECH STATE UNIV,DEPT MECH ENGN,GREENSBORO,NC 27411, USA. NR 1 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0020-7683 J9 INT J SOLIDS STRUCT JI Int. J. Solids Struct. PD APR PY 1996 VL 33 IS 9 BP 1371 EP 1373 DI 10.1016/0020-7683(96)90021-9 PG 3 WC Mechanics SC Mechanics GA TT729 UT WOS:A1996TT72900011 ER PT J AU Kester, JJ Ranon, PM Dajani, I Pribyl, S White, WR AF Kester, JJ Ranon, PM Dajani, I Pribyl, S White, WR TI Modal properties of second-harmonic generation in doped-silica planar waveguides SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID OPTICAL FIBERS; 2ND-HARMONIC GENERATION; MODEL AB Planar waveguides of germania-doped silica have been optically modified to allow second-harmonic generation in various waveguiding modes. After optical modification, the propagation of only the fundamental wave produced film-generated second-harmonic light in the same waveguide mode with which it had been prepared. The relative efficiencies of several mode combinations were all measured to be within an order of magnitude of one another and in reasonable agreement with theoretical predictions. Furthermore, we discuss the discrepancy between the theoretical calculations and experimental observations of the modal properties of second-harmonic generation in fibers. C1 USAF ACAD,FRANK J SEILER RES LAB,COLORADO SPRINGS,CO 80840. USAF ACAD,DEPT PHYS,LASER & OPT RES CTR,COLORADO SPRINGS,CO 80840. NR 15 TC 2 Z9 2 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD APR 1 PY 1996 VL 79 IS 7 BP 3385 EP 3389 DI 10.1063/1.361379 PG 5 WC Physics, Applied SC Physics GA UC073 UT WOS:A1996UC07300003 ER PT J AU Murrell, LL Carlin, RT AF Murrell, LL Carlin, RT TI Silver on ceria: An example of a highly active surface phase oxide carbon oxidation catalyst SO JOURNAL OF CATALYSIS LA English DT Article ID ELECTRON-MICROSCOPY; GASIFICATION; GRAPHITE C1 USAF ACAD,FJ SEILER RES LAB,COLORADO SPRINGS,CO 80840. NR 15 TC 17 Z9 17 U1 0 U2 3 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9517 J9 J CATAL JI J. Catal. PD APR 1 PY 1996 VL 159 IS 2 BP 479 EP 490 DI 10.1006/jcat.1996.0112 PG 12 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA UK197 UT WOS:A1996UK19700027 ER PT J AU Waller, SG LaMarche, K Talamo, JH AF Waller, SG LaMarche, K Talamo, JH TI Implantation of collagen plugs into incisional keratotomies SO JOURNAL OF CATARACT AND REFRACTIVE SURGERY LA English DT Article AB Purpose: To evaluate whether supplementing incisional keratotomy bulk or gape with a biocompatible material enhances the refractive effect. Setting: Refractive Surgery Laboratory, Massachusetts Eye and Ear Infirmary, Boston. Methods: Collagen punctal plugs were implanted into astigmatic keratotomy (AK) incisions in the right eyes of five rabbits and six adult cats. The left eyes had AK only and served as controls. Results: Some of the postoperative corneal topographic measurements suggested an enhanced refractive effect. At 1 month, histology demonstrated no remaining implant material and no inflammation in or near the incisions. Conclusions: Implanting a biocompatible material into AK incisions in two live animal models appears to be safe and may enhance the effect of the incisions. Further study is needed to quantify the magnitude and duration of any refractive effect. RP Waller, SG (reprint author), WILFORD HALL USAF MED CTR,DEPT OPHTHALMOL,LACKLAND AFB,TX 78236, USA. NR 4 TC 3 Z9 3 U1 0 U2 0 PU AMER SOC CATARACT REFRACTIVE SURGERY PI FAIRFAX PA 4000 LEGATO RD, SUITE 850, FAIRFAX, VA 22030 SN 0886-3350 J9 J CATARACT REFR SURG JI J. Cataract. Refract. Surg. PD APR PY 1996 VL 22 IS 3 BP 304 EP 306 PG 3 WC Ophthalmology; Surgery SC Ophthalmology; Surgery GA UE697 UT WOS:A1996UE69700015 PM 8778361 ER PT J AU Bostwick, JM Brown, TM AF Bostwick, JM Brown, TM TI A toxic reaction from combining fluoxetine and phentermine SO JOURNAL OF CLINICAL PSYCHOPHARMACOLOGY LA English DT Letter ID LIVER RP Bostwick, JM (reprint author), WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236, USA. NR 14 TC 9 Z9 9 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0271-0749 J9 J CLIN PSYCHOPHARM JI J. Clin. Psychopharmacol. PD APR PY 1996 VL 16 IS 2 BP 189 EP 190 DI 10.1097/00004714-199604000-00012 PG 2 WC Pharmacology & Pharmacy; Psychiatry SC Pharmacology & Pharmacy; Psychiatry GA UD632 UT WOS:A1996UD63200013 PM 8690835 ER PT J AU Shields, ED Mann, RW AF Shields, ED Mann, RW TI Salivary glands and human selection: A hypothesis SO JOURNAL OF CRANIOFACIAL GENETICS AND DEVELOPMENTAL BIOLOGY LA English DT Review DE polymorphism; sexual dimorphism; salt loss; infectious disease; isotherm; immuno-enhance; osteoclast; Stafne; Stafne's ID EPIDERMAL GROWTH-FACTOR; HISTIDINE-RICH POLYPEPTIDES; SUB-MANDIBULAR GLANDS; SUBMANDIBULAR GLANDS; TISSUE DISTRIBUTION; ESCHERICHIA-COLI; CANDIDA-ALBICANS; BONE-RESORPTION; BLOOD-PRESSURE; FEMALE MICE AB Stafne static bone defect (SSB) of the mandible is the only described destructive bone lesion that is highly localized, nonprogressive, but nonhealing. This common defect in males is found in the region of the major salivary glands that produce a cornucopia of biologically active factors, We describe rare phenocopies caused by mandibular immobility that hold the gland in a constant position thus implicating a localized chronic ''leak'' of an osteoclast induction factor from the major salivary glands as the pathologic agent. This finding suggests that increased salivary gland size could simulate immobility by apposing the gland to bone, thus allowing the ''leaked'' factor's gradient to have an effect. In one step, the putative genetic enlargement of a critical gland that produces many factor:, important for survival, a broad biological vista would be available to the massive potential fur both positive and negative selection. Positive selection was identified by observing a correlation between the prevalence of enhanced androgen-induced enlarged salivary glands (SSBD as a marker, with a great preponderance of males) and the conjectured resulting increased production of immunoreactive factors, with pole-to-equator isotherm and broad ranged infection clines. Negative selection was observed among the slave ancestors of African Americans for a potential embryonic homeotic mutation causing larger salivary glands in both sexes (decreased prevalence of SSBD, with an equal sex ratio). The decreased production of saliva and electrolytes diminished the salt and water depletive effects of severe diarrhea and vomiting induced by enteric diseases, which killed many slaves. Data presented suggests that SSBD is a polymorphism and a marker of selection processes that cause variation in size, or structure, of the major salivary glands. C1 MCGILL UNIV,FAC MED,DEPT HUMAN GENET,MONTREAL,PQ H3A 2B2,CANADA. USA,CENT IDENTIFICAT LAB,HICKAM AFB,HI. RP Shields, ED (reprint author), MCGILL UNIV,FAC DENT,DEPT ORAL BIOL,3640 UNIV ST,MONTREAL,PQ H3A 2B2,CANADA. NR 120 TC 8 Z9 8 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0270-4145 J9 J CRAN GENET DEV BIO JI J. Craniofac. Genet. Dev. Biol. PD APR-JUN PY 1996 VL 16 IS 2 BP 126 EP 136 PG 11 WC Anatomy & Morphology; Developmental Biology; Genetics & Heredity SC Anatomy & Morphology; Developmental Biology; Genetics & Heredity GA UM596 UT WOS:A1996UM59600007 PM 8773904 ER PT J AU Vaccaro, K Davis, A Dauplaise, HM Spaziani, SM Martin, EA Lorenzo, JP AF Vaccaro, K Davis, A Dauplaise, HM Spaziani, SM Martin, EA Lorenzo, JP TI Cadmium sulfide surface stabilization for InP-based optoelectronic devices SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article; Proceedings Paper CT 7th International Conference on Indium Phosphide and Related Materials (IPRM 95) CY MAY 09-13, 1995 CL HOKKAIDO UNIV, SAPPORO, JAPAN SP Japan Soc Appl Phys, IEEE Lasers & Electro Opt Soc, IEEE Electron Devices Soc, Inst Electr Informat & Commun Engineers, Optoelectr Ind & Technol Dev Assoc, Res & Dev Assoc Future Electron Devices HO HOKKAIDO UNIV DE III-V semiconductors; cadmium sulfide; InP; interface; metal-insulator-semiconductor (MIS); passivation; Schottky barrier ID PASSIVATION; SULFUR AB Thin layers of chemical bath deposited cadmium sulfide were used to improve the surface and interface properties of InP and its latticed-matched III-V compounds. X-ray photoelectron spectroscopy indicates chemical reduction of surface oxides and the prevention of subsequent group III or V oxide formation. Photoluminescence spectra, measured between 1.0 and 1.3 mu m, indicate a dramatic reduction in phosphorus vacancies following CdS treatment. Metal-insulator-semiconductor capacitors fabricated on n-type InP substrates with CdS interlayers display near-ideal quasi-static response and interface-state densities in the low 10(11)/eVcm(2) range. Thin CdS layers were used to passivate the surface of InAlAs/InGaAs high electron mobility transistors (HEMTs) and metal-semiconductor-metal (MSM) photodetectors. After CdS treatment, Schottky diode barrier heights of 0.6 eV were regularly obtained. For HEMTs, drain-to-gate current ratios of 8 x 10(4) were observed after CdS treatment. For a new backside illuminated MSM design, the dark current of CdS-treated samples was reduced three orders of magnitude to below 1 nA. RP Vaccaro, K (reprint author), USAF,ROME LAB,OPT COMPONENTS BRANCH,BEDFORD,MA 01731, USA. NR 19 TC 9 Z9 9 U1 0 U2 2 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD APR PY 1996 VL 25 IS 4 BP 603 EP 609 DI 10.1007/BF02666511 PG 7 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA UE592 UT WOS:A1996UE59200011 ER PT J AU Stadler, BJH Vaccaro, K Davis, A Ramseyer, GO Martin, EA Dauplaise, HM Theodore, LM Lorenzo, JP AF Stadler, BJH Vaccaro, K Davis, A Ramseyer, GO Martin, EA Dauplaise, HM Theodore, LM Lorenzo, JP TI Optoelectronic properties of transition metal and rare earth doped epitaxial layers on InP for magneto-optics SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article; Proceedings Paper CT 7th International Conference on Indium Phosphide and Related Materials (IPRM 95) CY MAY 09-13, 1995 CL HOKKAIDO UNIV, SAPPORO, JAPAN SP Japan Soc Appl Phys, IEEE Lasers & Electro Opt Soc, IEEE Electron Devices Soc, Inst Electr Informat & Commun Engineers, Optoelectr Ind & Technol Dev Assoc, Res & Dev Assoc Future Electron Devices HO HOKKAIDO UNIV DE Faraday rotation InGaAs; InGaAsP; InP; LPE; optoelectronic properties; rare earth; transition metal doping; waveguides ID CD1-XMNXTE AB Rare earth- and transition metal-doped thin films of InP, In0.53Ga0.47As, and In0.71Ga0.29As0.58P0.42 were grown by liquid phase epitaxy and evaluated for use in integrated electro-optical and magneto-optical applications, such as waveguides and Faraday rotators. The films were lattice matched to (100) InP substrates, and the transition metal (Mn) and rare earth (Gd, Eu, and Er) doping concentrations were between 2.6 x 10(18) and 1.5 x 10(20) cm(-3). The chemical profiles were generally found to be homogeneous by SIMS, although in more highly doped films the rare earths were observed to segregate toward the interfaces. The undoped films were n-type, and the net carrier concentrations in the rare earth-doped (Gd, Eu, Er) films were decreased by an order of magnitude. The Mn-doped films were p-type. Optically, the rare earth dopants were observed to raise the refractive index of the layers at 632.8 nm, and subsequent waveguiding in doped InP layers was observed at 1.3 mu m. Although the Faraday rotations of our materials were much less than that of well known oxides, such as yttrium iron garnet, they were sufficient for device applications, and our materials can be much more easily integrated with InP OEIC devices. For example, a 1 cm waveguide would provide the large rotation (45 degrees) required in isolator applications. RP Stadler, BJH (reprint author), USAF,ROME LAB,OPTOELECTR COMPONENTS BRANCH,BEDFORD,MA 01731, USA. NR 15 TC 2 Z9 2 U1 1 U2 6 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD APR PY 1996 VL 25 IS 4 BP 709 EP 713 DI 10.1007/BF02666528 PG 5 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA UE592 UT WOS:A1996UE59200028 ER PT J AU Miner, JR Dell, J Galbato, AT Ragen, MA AF Miner, JR Dell, J Galbato, AT Ragen, MA TI F117-PW-100 hybrid ball bearing ceramic technology insertion SO JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME LA English DT Article; Proceedings Paper CT 40th International Gas Turbine and Aeroengine Congress and Exhibition CY JUN 05-08, 1995 CL HOUSTON, TX AB Results of an Advanced Research Projects Agency (ARPA) sponsored project to demonstrate the operational benefits of incorporating advanced structural ceramic ball elements into the F117-PW-100 aircraft gas turbine engine high rotor thrust bearings is described. This program consists of design, fabrication, and experimental evaluation of candidate hybrid ball bearing designs in Pratt & Whitney and MRC Bearings test facilities. The bearing design criteria and development test conditions utilized for the project are compatible with the requirements of the F117-PW-100 engine system application. Two hybrid bearing designs were produced by analytically varying internal geometry features such as M-50 race curvatures and contact angles to optimize for the modulus of elasticity of the ceramic balls. CERBEC grade NBD 200 silicon nitride ceramic balls (1 1/8 in. size) demonstrated integrity and a quadruple rolling contact fatigue life improvement versus state-of-the-art M-50 steel balls in single ball test rigs. Thermal performance data obtained in fill-scale bearing rig performance testing with 178 mm size hybrid and all-steel baseline bearings shows comparable characteristics. The hybrid bearing displayed a distinct survivability benefit in bearing liquid lubricant starvation resting. Two dozen hybrid bearings will be fabricated for full-scale bearing rig endurance tests to be conducted in 1995-1996 as a prerequisite to validation in operating F117-PW-100 engines in 1996-1997. C1 USAF,WRIGHT LAB,DAYTON,OH 45433. MRC BEARINGS,JAMESTOWN,NY 14701. RP Miner, JR (reprint author), UNITED TECHNOL CORP,PRATT & WHITNEY,W PALM BEACH,FL 33410, USA. NR 3 TC 20 Z9 20 U1 2 U2 2 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0742-4795 J9 J ENG GAS TURB POWER JI J. Eng. Gas. Turbines Power-Trans. ASME PD APR PY 1996 VL 118 IS 2 BP 434 EP 442 DI 10.1115/1.2816608 PG 9 WC Engineering, Mechanical SC Engineering GA UJ384 UT WOS:A1996UJ38400028 ER PT J AU Wong, MT Dolan, MJ Kozlow, E Doe, R Melcher, GP Burke, DS Boswell, RN Vahey, M AF Wong, MT Dolan, MJ Kozlow, E Doe, R Melcher, GP Burke, DS Boswell, RN Vahey, M TI Patterns of virus burden and T cell phenotype are established early and are correlated with the rate of disease progression in human immunodeficiency virus type 1-infected persons SO JOURNAL OF INFECTIOUS DISEASES LA English DT Article ID HIV-1 INFECTION; PERIPHERAL-BLOOD; PROGNOSTIC VALUE; LYMPHOCYTES-T; CD4+; EXPRESSION; CD26; INDIVIDUALS; ACTIVATION; PLASMA AB Human immunodeficiency virus (HIV)-1 DNA and RNA levels and T lymphocyte cell surface markers were measured in blood serum and cell fractions from asymptomatic infected patients to find novel virologic and immunologic features in early disease predictive of subsequent clinical disease course, Thirty-two patients with rapid disease progression (rapid CD4(+) cell loss and progression to clinical AIDS) were compared with 25 patients with stable infections (constant or rising CD4(+) cell counts, no clinical disease manifestations). All HIV-1 burdens measured by polymerase chain reaction were consistently higher in specimens from rapid progressors than slow progressors. For each patient, virus burden remained relatively constant throughout the study period (mean, 42-44 months), Flow cytometry also disclosed stable lymphocyte immunophenotype patterns that correlated strongly with subsequent rapid progression to clinical disease, Thus, in early HIV-1 infection, a constellation of high virus burden and in vivo costimulatory antigen and lymphocyte activation abnormalities is predictive of a rapid disease course. C1 WILFORD HALL USAF MED CTR,DEPT ALLERGY & IMMUNOL,LACKLAND AFB,TX 78236. WILFORD HALL USAF MED CTR,DEPT PATHOL,LACKLAND AFB,TX 78236. WALTER REED ARMY INST RES,DIV RETROVIROL,ROCKVILLE,MD. RP Wong, MT (reprint author), WILFORD HALL USAF MED CTR,DEPT INFECT DIS,2200 BERGQUIST DR,SUITE 1,LACKLAND AFB,TX 78236, USA. OI /0000-0002-5704-8094 NR 46 TC 42 Z9 42 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0022-1899 J9 J INFECT DIS JI J. Infect. Dis. PD APR PY 1996 VL 173 IS 4 BP 877 EP 887 PG 11 WC Immunology; Infectious Diseases; Microbiology SC Immunology; Infectious Diseases; Microbiology GA UB274 UT WOS:A1996UB27400013 PM 8603966 ER PT J AU Johnson, ML Reardon, CL AF Johnson, ML Reardon, CL TI Monensin facilitates Golgi staining of intracellular cytokines in epidermal cell lines. SO JOURNAL OF INVESTIGATIVE DERMATOLOGY LA English DT Meeting Abstract C1 UNIV COLORADO,HLTH SCI CTR,DEPT DERMATOL,DENVER,CO. USAF,INST TECHNOL,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BLACKWELL SCIENCE INC PI CAMBRIDGE PA 238 MAIN ST, CAMBRIDGE, MA 02142 SN 0022-202X J9 J INVEST DERMATOL JI J. Invest. Dermatol. PD APR PY 1996 VL 106 IS 4 BP 750 EP 750 PG 1 WC Dermatology SC Dermatology GA UC787 UT WOS:A1996UC78700789 ER PT J AU Posta, CG AF Posta, CG TI Surgical decisions in the laparoscopic management of small bowel obstruction: Report on two cases SO JOURNAL OF LAPAROENDOSCOPIC SURGERY LA English DT Article AB Laparoscopic management of bowel obstruction secondary to adhesions presents a difficult challenge for the general surgeon, The surgical management of two such cases is reported here: one patient with recurrent abdominal pain secondary to partial bowel obstruction, the other with acute small bowel obstruction, Surgical decision-making and technical aspects of the procedures are described, With careful patient selection and meticulous technique laparoscopic resolution of bowel obstruction may be feasible and should be attempted. C1 USAF HOSP,GEN SURG SERV,HILL AFB,UT 84056. NR 10 TC 2 Z9 2 U1 0 U2 0 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 1052-3901 J9 J LAPAROENDOSC SURG JI J. Laparoendosc. Surg. PD APR PY 1996 VL 6 IS 2 BP 117 EP 122 DI 10.1089/lps.1996.6.117 PG 6 WC Surgery SC Surgery GA UK221 UT WOS:A1996UK22100009 PM 8735050 ER PT J AU Lander, ML Bagford, JO Seibert, DB Hull, RJ AF Lander, ML Bagford, JO Seibert, DB Hull, RJ TI High power calibration of commercial power meters using an NIST-traceable secondary standard SO JOURNAL OF LASER APPLICATIONS LA English DT Article DE laser power measurement; power meter calibration; NIST standard AB For the past 19 years, the Laser Hardened Materials Evaluation Laboratory (LHMEL), located at Wright-Patterson AFB, OH, has maintained a number of calibrated high energy power measurement devices capable of measuring CO2 powers up to 150 kW. These devices, calibrated annually to the National Institute for Standards & Technology (NIST) high energy standard calorimeters, serve as secondary standards for in-house calibration of LHMEL's commercial power heads and calorimeters. Recent discussions with academic and industrial laser users have identified an industry need for traceable calibration sources above the 1 kW level. This paper describes the methods used to calibrate LHMEL's commercial power measurement devices using the LHMEL secondary standards and also describes the process by which other laser users can access these same calibration capabilities to confirm the accuracy of their own power heads and calorimeters. The LHMEL calibration capability offers academic and industrial laser users the opportunity to economically calibrate existing power measurement devices on demand to an NIST-traceable secondary standard. The method described has been applied to calibrate systems up to 100 kW while maintaining measurement accuracies to within +/-6.3%. C1 WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. RP Lander, ML (reprint author), OGDEN LAWRENCE ASSOCIATES,DAYTON,OH 45433, USA. NR 5 TC 0 Z9 0 U1 1 U2 1 PU LASER INST AMER PI ORLANDO PA 12424 RESEARCH PARKWAY SUITE 125, ORLANDO, FL 32826 SN 1042-346X J9 J LASER APPL JI J. Laser Appl. PD APR PY 1996 VL 8 IS 2 BP 103 EP 107 PG 5 WC Materials Science, Multidisciplinary; Optics; Physics, Applied SC Materials Science; Optics; Physics GA UQ348 UT WOS:A1996UQ34800007 ER PT J AU Harrison, MJ Welling, BG DuBois, JJ AF Harrison, MJ Welling, BG DuBois, JJ TI A new method for inserting the atrial end of a ventriculoatrial shunt - Technical note SO JOURNAL OF NEUROSURGERY LA English DT Article DE hydrocephalus; percutaneous insertion; technique; ventriculoatrial shunt; ventriculoperitoneal shunt AB This technical note describes a simple percutaneous mechanism for placement of the atrial end of ventriculoatrial shunts. The method is fast, efficient, and involves no neck dissection. No special equipment is required. Placement involves the technique of central line insertion familiar to all surgeons. This new method has been used successfully in one adult and one pediatric patient. C1 USAF,DAVID GRANT MED CTR,DIV PEDIAT SURG,TRAVIS AFB,CA 94533. RP Harrison, MJ (reprint author), USAF,DAVID GRANT MED CTR,DIV NEUROSURG,101 BODIN CIRCLE,TRAVIS AFB,CA 94533, USA. NR 7 TC 9 Z9 9 U1 0 U2 1 PU AMER ASSOC NEUROLOGICAL SURGEONS PI CHARLOTTESVILLE PA UNIV VIRGINIA, 1224 WEST MAIN ST, STE 450, CHARLOTTESVILLE, VA 22903 SN 0022-3085 J9 J NEUROSURG JI J. Neurosurg. PD APR PY 1996 VL 84 IS 4 BP 705 EP 707 DI 10.3171/jns.1996.84.4.0705 PG 3 WC Clinical Neurology; Surgery SC Neurosciences & Neurology; Surgery GA UC211 UT WOS:A1996UC21100026 PM 8613869 ER PT J AU Lorenzini, NA Schneider, JH AF Lorenzini, NA Schneider, JH TI Temporary loss of intraoperative motor-evoked potential and permanent loss of somatosensory-evoked potentials associated with a postoperative sensory deficit SO JOURNAL OF NEUROSURGICAL ANESTHESIOLOGY LA English DT Article DE monitoring; motor-evoked potentials; monitoring; somatosensory-evoked potentials; spinal cord neoplasm ID SPINAL-CORD ISCHEMIA; NEUROLOGIC DEFICITS; ANIMALS AB We describe a case of the temporary loss of right popliteal fossa intraoperative neurogenic motor-evoked potential and the permanent loss of right median and ulnar somatosensory-evoked potentials (SSEPs) with retention of posterior tibial (SSEPs) during intramedullary spinal cord surgery in a 28-year-old man. Postoperatively, the patient had preserved motor function in all extremities and loss of proprioception, two-point discrimination, and vibration in his right upper extremity. The complementary and beneficial use of intraoperative monitoring of both motor-evoked potentials and SSEPs during spinal cord surgery is discussed. C1 WILFORD HALL USAF MED CTR,DEPT ANESTHESIOL,PSSA,SAN ANTONIO,TX 78236. WILFORD HALL USAF MED CTR,DEPT NEUROSURG,SAN ANTONIO,TX 78236. NR 13 TC 4 Z9 4 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0898-4921 J9 J NEUROSURG ANESTH JI J. Neurosurg. Anesthesiol. PD APR PY 1996 VL 8 IS 2 BP 142 EP 147 PG 6 WC Anesthesiology; Clinical Neurology; Surgery SC Anesthesiology; Neurosciences & Neurology; Surgery GA UC301 UT WOS:A1996UC30100008 PM 8829562 ER PT J AU Koroscil, TM Harter, SB Ouweleen, J Blauer, KL AF Koroscil, TM Harter, SB Ouweleen, J Blauer, KL TI Use of a gonadotropin-releasing hormone agonist in the evaluation of postmenopausal virilization due to ovarian hyperthecosis - A case report SO JOURNAL OF REPRODUCTIVE MEDICINE LA English DT Article DE gonadotropin-releasing hormone; postmenopause; virilism; ovarian diseases ID STROMAL HYPERTHECOSIS; WOMAN; GLUCURONIDE AB BACKGROUND: Hyperthecosis in a postmenopausal woman is a very rare cause of virilization, and only five cases have been reported previously. CASE: A woman presented with a nine-year history of increasing hirsutism and mild virilization beginning in the perimenopausal period. Initial androgen metabolite concentrations suggested attenuated late-onset adrenal hyperplasia, but a trial of dexamethasone treatment was ineffective. Subsequent use of leuprolide acetate resulted in a biochemical and clinical improvement in the signs and symptoms. CONCLUSION: This case is unique because gonadotropin-releasing hormone agonist administration was utilized as both a diagnostic and therapeutic modality. C1 USAF,MED CTR,DEPT INTERNAL MED,WRIGHT PATTERSON AFB,OH 45433. REPROD ENDOCRINOL ASSOCIATES,GREENVILLE,NC. RP Koroscil, TM (reprint author), USAF,MED CTR,DEPT OBSTET & GYNECOL,MED GRP 645TH,SGHMI,4881 SUGAR MAPLE DR,WRIGHT PATTERSON AFB,OH 45433, USA. NR 16 TC 6 Z9 6 U1 0 U2 0 PU SCI PRINTERS & PUBL INC PI ST LOUIS PA P.O. DRAWER 12425 8342 OLIVE BLVD, ST LOUIS, MO 63132 SN 0024-7758 J9 J REPROD MED JI J. Reprod. Med. PD APR PY 1996 VL 41 IS 4 BP 259 EP 262 PG 4 WC Obstetrics & Gynecology SC Obstetrics & Gynecology GA UF707 UT WOS:A1996UF70700010 PM 8728079 ER PT J AU Dutton, RE Pagano, NJ Kim, RY AF Dutton, RE Pagano, NJ Kim, RY TI Crack initiation in borosilicate glass-SiC fiber composites SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID BRITTLE-MATRIX COMPOSITES AB The initiation of matrix microcracking was investigated in unidirectional glass matrix composites having controlled fiber spacing. Observations were taken from composites consisting of regular arrays of TiB2-coated SIGMA 1240 and carbon-coated SCS-6 monofilament SiC fibers in a series of borosilicate glasses, The thermal expansion mismatch between the fibers and glass matrix was varied such that the resulting radial stresses after processing ranged from tensile to compressive, The glass strongly bonds to the TiB2-coated SIGMA 1240 fiber but weakly bonds to the carbon coating of the SCS-6 fiber, allowing the investigation of the effects of bonding at the fiber/matrix interface. The observed crack initiation stresses of the various composites are compared to predictions based on a previously developed semiempirical model and used to study the influence of the volume fraction of fibers, residual stress state and interface strength. C1 UNIV DAYTON,RES INST,DAYTON,OH 45469. RP Dutton, RE (reprint author), NIST,MAT DIRECTORATE,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433, USA. NR 19 TC 14 Z9 14 U1 0 U2 0 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD APR PY 1996 VL 79 IS 4 BP 865 EP 872 DI 10.1111/j.1151-2916.1996.tb08518.x PG 8 WC Materials Science, Ceramics SC Materials Science GA UG959 UT WOS:A1996UG95900008 ER PT J AU Copenhaver, WW Mayhew, ER Hah, C Wadia, AR AF Copenhaver, WW Mayhew, ER Hah, C Wadia, AR TI The effect of tip clearance on a swept transonic compressor rotor SO JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME LA English DT Article; Proceedings Paper CT 39th International Gas Turbine and Aeroengine Congress and Exposition CY JUN 13-16, 1994 CL THE HAGUE, NETHERLANDS ID PERFORMANCE; FLOWS AB An experimental and numerical investigation of detailed tip clearance flow structures and their effects on the aerodynamic performance of a modern low-aspect-ratio, high-throughflow, axial transonic fan is presented, Rotor flow fields were investigated at two clearance levels experimentally, at tip clearance to tip blade chord ratios of 0.27 and 1.87 percent, and at four clearance levels numerically, at ratios of zero, 0.27, 1.0, and 1.87 percent. The numerical method seems to calculate the rotor aerodynamics well, with some disagreement in loss calculation which might be improved with improved turbulence modeling and a further refined grid. Both the experimental and the numerical results indicate that the performance of this class of rotors is dominated by the tip clearance flows. Rotor efficiency drops six points when the tip clearance is increased from 0.27 to 1.87 percent, and flow range decreases about 30 percent. No optimum clearance size for the present rotor was indicated. Most of the efficiency change occurs near the tip section, with the interaction between the tip clearance flow and the passage shock becoming much stronger when the tip clearance is increased. In all cases, the shock structure was three dimensional and swept, with the shock becoming normal to the endwall near the shroud. C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. GE AIRCRAFT ENGINES,CINCINNATI,OH 45215. RP Copenhaver, WW (reprint author), USAF,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433, USA. NR 21 TC 25 Z9 27 U1 4 U2 5 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0889-504X J9 J TURBOMACH JI J. Turbomach.-Trans. ASME PD APR PY 1996 VL 118 IS 2 BP 230 EP 239 DI 10.1115/1.2836630 PG 10 WC Engineering, Mechanical SC Engineering GA UJ511 UT WOS:A1996UJ51100007 ER PT J AU Overbeck, JA Salisbury, MS Richmond, R AF Overbeck, JA Salisbury, MS Richmond, R TI Airborne lidar system profiles wind fields SO LASER FOCUS WORLD LA English DT Article C1 USAF,WRIGHT LAB,ACT SYST SECT,WRIGHT PATTERSON AFB,OH 45433. RP Overbeck, JA (reprint author), TECHNOL SCI SERV INC,OVERLOOK BRANCH,POB 3065,DAYTON,OH 45437, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU PENNWELL PUBL CO PI NASHUA PA 5TH FLOOR TEN TARA BOULEVARD, NASHUA, NH 03062-2801 SN 0740-2511 J9 LASER FOCUS WORLD JI Laser Focus World PD APR PY 1996 VL 32 IS 4 BP 89 EP 92 PG 4 WC Optics SC Optics GA UV521 UT WOS:A1996UV52100038 ER PT J AU Puffer, RL AF Puffer, RL TI A cavalryman's story: Memoirs of a twentieth-century army general - Howzer,H SO LIBRARY JOURNAL LA English DT Book Review RP Puffer, RL (reprint author), USAF,HIST PROGRAMME,EDWARDS AFB,CA, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD APR 1 PY 1996 VL 121 IS 6 BP 94 EP 94 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA UB440 UT WOS:A1996UB44000095 ER PT J AU Gallagher, MA Bauer, KW Maybeck, PS AF Gallagher, MA Bauer, KW Maybeck, PS TI Initial data truncation for univariate output of discrete-event simulations using the Kalman filter SO MANAGEMENT SCIENCE LA English DT Article DE output analysis; initial transient; truncation; Kalman filter; multiple model adaptive estimation ID STARTUP PROBLEM; STEADY-STATE AB Data truncation is a commonly accepted method of dealing with initialization bias in discrete-event simulation. An algorithm for determining the appropriate initial-data truncation point for univariate output is proposed. The technique entails averaging across independent replications and estimating a steady-state output model in a state-space framework. A Bayesian technique called Multiple Model Adaptive Estimation (MMAE) is applied to compute a time varying estimate of the output's steady-state mean. This MMAE implementation features the use, in parallel, of a bank of three Kalman filters. Each filter is constructed under a different assumption about the output's steady-state mean. One of the filters assumes that the steady-state mean is accurately reflected by an estimate, called the ''assumed steady-state mean,'' taken from the last half of the simulation data. This filter is called the reference filter. The remaining filters are calibrated with steady-state means corresponding to simple functions of the minimum and maximum data values, respectively. As the filters process the output through the effective transient, the reference filter becomes more likely (in a Bayesian sense) to be the best filter to represent the data, and the MMAE mean estimator is influenced increasingly towards the assumed steady-state mean. The estimated truncation point is selected when the MMAE mean estimate is within a small tolerance of the assumed steady-state mean. A Monte Carlo analysis using data generated from twelve simulation models is used to evaluate the technique. The evaluation criteria include the ability to estimate accurately and to construct reliable confidence intervals for the mean of the response based on the truncated sequences. RP Gallagher, MA (reprint author), USAF,INST TECHNOL,WRIGHT PATTERSON AFB,OH 45433, USA. NR 29 TC 5 Z9 5 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 SN 0025-1909 J9 MANAGE SCI JI Manage. Sci. PD APR PY 1996 VL 42 IS 4 BP 559 EP 575 DI 10.1287/mnsc.42.4.559 PG 17 WC Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA WG418 UT WOS:A1996WG41800006 ER PT J AU Ford, SD Roggemann, MC Welsh, BM AF Ford, SD Roggemann, MC Welsh, BM TI Frame selection performance limits for statistical image reconstruction of adaptive optics compensated images SO OPTICAL ENGINEERING LA English DT Article DE image recovery and synthesis; frame selection; image quality metrics; adaptive optics; imaging through turbulence ID SYSTEMS AB Adaptive optics systems have been used to compensate for the degrading effects of atmospheric turbulence in images collected with large astronomical telescopes. Postdetection processing techniques are also employed to further improve adaptive optics compensated images. Typically, many short-exposure images are collected, recentered to compensate for tilt, and then averaged to overcome randomness in the images and improve signal-to-noise ratio (SNR). Experience shows that some short-exposure images in a data set are better than others. The frame selection postdetection processing technique uses an image quality metric to discard low-quality frames and improve image spectrum SNR. We address key issues pertaining to frame selection performance limits. Noise trade-offs are used to investigate minimum object brightness for successful application of the frame selection technique. Limits imposed by noise effects result in a minimum object brightness of apparent visual magnitude +8 for point sources and +4 for a 12-m length representative extended object imaged with a 1-m-diam telescope with no central obscuration. Effective average point spread functions for the point source and the representative extended object after frame selection processing under equivalent seeing conditions are almost identical. Thus, deconvolution could be applied to these images obtained via frame selection. (C) 1996 Society of Photo-Optical instrumentation Engineers. C1 USAF,INST TECHNOL,GRAD SCH ENGN,DEPT ENGN PHYS,WRIGHT PATTERSON AFB,OH 45433. RP Ford, SD (reprint author), USAF,INST TECHNOL,GRAD SCH ENGN,DEPT ELECT & COMP ENGN,2950 P ST,BLDG 640,WRIGHT PATTERSON AFB,OH 45433, USA. NR 19 TC 5 Z9 5 U1 0 U2 0 PU SOC PHOTO-OPT INSTRUM ENG PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD APR PY 1996 VL 35 IS 4 BP 1025 EP 1034 DI 10.1117/1.600719 PG 10 WC Optics SC Optics GA UE920 UT WOS:A1996UE92000015 ER PT J AU Hall, BF Holcomb, RG Smalley, JR AF Hall, BF Holcomb, RG Smalley, JR TI The incidence and potential risk factors for febrile illness in infants less than 2 months of age. SO PEDIATRIC RESEARCH LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,SAN ANTONIO,TX 78236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 1996 VL 39 IS 4 BP 1262 EP 1262 PN 2 PG 1 WC Pediatrics SC Pediatrics GA UD238 UT WOS:A1996UD23801263 ER PT J AU Hall, BH Yoder, BA Stribley, RF AF Hall, BH Yoder, BA Stribley, RF TI Evaluation of a hybrid high-frequency ventilator in a surfactant deficient rabbit model at simulated altitude. SO PEDIATRIC RESEARCH LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 1996 VL 39 IS 4 BP 1263 EP 1263 PN 2 PG 1 WC Pediatrics SC Pediatrics GA UD238 UT WOS:A1996UD23801264 ER PT J AU Hudson, ML Louder, DS Stribley, RF AF Hudson, ML Louder, DS Stribley, RF TI Surfactant distribution in the piglet model of meconium aspiration. SO PEDIATRIC RESEARCH LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 1996 VL 39 IS 4 BP 1284 EP 1284 PN 2 PG 1 WC Pediatrics SC Pediatrics GA UD238 UT WOS:A1996UD23801285 ER PT J AU Schelonka, RL Hurst, MK Yoder, BA Hensley, D Brockett, RM Ascher, DP AF Schelonka, RL Hurst, MK Yoder, BA Hensley, D Brockett, RM Ascher, DP TI Volume of blood required to detect common neonatal pathogens SO PEDIATRIC RESEARCH LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,SAN ANTONIO,TX 78236. NR 0 TC 0 Z9 0 U1 1 U2 1 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 1996 VL 39 IS 4 BP 1442 EP 1442 PN 2 PG 1 WC Pediatrics SC Pediatrics GA UD238 UT WOS:A1996UD23801443 ER PT J AU Young, MK Yoder, BA AF Young, MK Yoder, BA TI Outcomes of teenage pregnancy in a military population. SO PEDIATRIC RESEARCH LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,DEPT PEDIAT,LACKLAND AFB,TX 78236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 1996 VL 39 IS 4 BP 1695 EP 1695 PN 2 PG 1 WC Pediatrics SC Pediatrics GA UD238 UT WOS:A1996UD23801696 ER PT J AU Burton, BD Louder, DS Yoder, BA AF Burton, BD Louder, DS Yoder, BA TI Factor associated with treatment outcomes in newborns of maternal pretreated chorioamnionitis. SO PEDIATRIC RESEARCH LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,DEPT PEDIAT,LACKLAND AFB,TX 78236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 1996 VL 39 IS 4 BP 1745 EP 1745 PN 2 PG 1 WC Pediatrics SC Pediatrics GA UD238 UT WOS:A1996UD23801745 ER PT J AU Mall, S Dosedel, SB Holl, MW AF Mall, S Dosedel, SB Holl, MW TI The performance of graphite-epoxy composite with embedded optical fibers under compression SO SMART MATERIALS & STRUCTURES LA English DT Article ID BISMALEIMIDE AB The effect of embedded optical fibers on the compressive strength and stiffness of a graphite-epoxy composite, AS4/3501-6, consisting of 30 plies with 40% 0 degrees plies, 20% 90 degrees plies, and 40% +/-45 degrees plies, was investigated. Five laminates were fabricated with different numbers of optical fibers, optical fiber diameters, optical fiber locations, and optical fiber orientations with respect to reinforcing graphite fibers, which provided 15 groups of specimens. Each group contained 10 specimens which were tested under compression using an IITRI fixture. Optical fibers were oriented perpendicular to the loading direction in all specimens. The maximum reduction in compressive strength was 27% in specimens where two optical fibers were placed perpendicular to surrounding graphite fibers. In this case, one optical fiber was located at the specimen midplane while the other was located three plies from the outer surface, resulting in an asymmetric condition about the midplane. Other variations of optical fibers perpendicular to graphite fibers resulted in less reduction and in some cases did not affect the compressive strength. All specimens where the optical fibers were placed parallel to reinforcing fibers resulted in no degradation of the compressive strength. No change in modulus was observed due to the presence of optical fibers in any group of specimens. C1 USAF, INST TECHNOL, DEPT AERONAUT & ASTRONAUT, WRIGHT PATTERSON AFB, OH 45433 USA. NR 14 TC 20 Z9 20 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0964-1726 J9 SMART MATER STRUCT JI Smart Mater. Struct. PD APR PY 1996 VL 5 IS 2 BP 209 EP 215 DI 10.1088/0964-1726/5/2/009 PG 7 WC Instruments & Instrumentation; Materials Science, Multidisciplinary SC Instruments & Instrumentation; Materials Science GA UL969 UT WOS:A1996UL96900009 ER PT J AU Graves, RL AF Graves, RL TI The transformation of the world economy, 1980-93 - Solomon,R SO SOUTHERN ECONOMIC JOURNAL LA English DT Book Review RP Graves, RL (reprint author), USAF,WASHINGTON,DC 20330, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV NORTH CAROLINA PI CHAPEL HILL PA SOUTHERN ECONOMIC JOURNAL, CHAPEL HILL, NC 27514 SN 0038-4038 J9 SOUTHERN ECON J JI South. Econ. J. PD APR PY 1996 VL 62 IS 4 BP 1112 EP 1113 DI 10.2307/1060967 PG 2 WC Economics SC Business & Economics GA UE511 UT WOS:A1996UE51100037 ER PT J AU Prasad, SV Mecklenburg, KR AF Prasad, SV Mecklenburg, KR TI Characterization of third bodies in self-lubricating aluminum metal-matrix composites by electron microprobe analysis SO TRIBOLOGY TRANSACTIONS LA English DT Article; Proceedings Paper CT 50th Annual Meeting of STLE CY MAY 14-19, 1995 CL CHICAGO, IL SP STLE ID GRAPHITE COMPOSITES; TRIBOLOGY; WEAR; FILMS AB Third bodies play a crucial role in governing the tribological behavior of self-lubricating composites. The present study deals with the characterization of third bodies generated during a two million-cycle wear test of a self-lubricating aluminum metal-matrix composite (MMC). The composite is comprised of five percent by volume of tungsten disulfide (WS2) and 10 vol. % of silicon carbide (SiC) dispersed in a commercial aluminum alloy (Al-0.40Si-0.75Mg) matrix. Friction and wear tests on the MMC were performed in laboratory air (55-65-% RH) with a 440C steel counterface in a ball-on-disk apparatus. The wear scar was characterized by electron microprobe analysis. The transfer film on the steel ball and the wear debris is were analyzed using a high-resolution scanning electron microscope. In the compositional backscattered electron image mode, the wear scar showed a dark phase with a sulfur to tungsten (S/W) atomic ratio of 4.2 and patches of partially oxidized tungsten disulfide with and S/W atomic ration of 1.6. The dark phase was distributed mostly in thin streaks along the direction of sliding. Tungsten disulfide platelets were not detected either in the wear debris or in the wear-induced transfer film on the steel counterface. The debris was predominantly spheroidal in shape. The debris and the transfer film were different in chemical composition from any of the constituent phases of the MMC. The synergistic role played by porosity, SiC and WS2 in imparting self-lubrication to the aluminum MMC was examined. RP Prasad, SV (reprint author), USAF,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 19 TC 5 Z9 5 U1 1 U2 1 PU SOC TRIBOLOGISTS & LUBRICATION ENGINEERS PI PARK RIDGE PA 838 BUSSE HIGHWAY, PARK RIDGE, IL 60068 SN 0569-8197 J9 TRIBOL T JI Tribol. Trans. PD APR PY 1996 VL 39 IS 2 BP 296 EP 305 DI 10.1080/10402009608983531 PG 10 WC Engineering, Mechanical SC Engineering GA UB372 UT WOS:A1996UB37200008 ER PT J AU Gschwender, L Snyder, CE Oleksiuk, M Koehler, M AF Gschwender, L Snyder, CE Oleksiuk, M Koehler, M TI Computational chemistry of soluble additives for perfluoropolyalkylether liquid lubricants SO TRIBOLOGY TRANSACTIONS LA English DT Article; Proceedings Paper CT 50th Annual Meeting of STLE CY MAY 14-19, 1995 CL CHICAGO, IL SP STLE DE fluorocarbons; antioxidant additives; corrosion inhibitor additives; gas turbine oils; dynamic modeling ID FORCE-FIELD AB Computational chemistry has been applied in a practical manner to a perfluoropolyalkylether (PFPAE) liquid lubricant research and development program. Additives have been previously shown to be effective in a PFPAE liquid lubricant candidate gas turbine engine oil base fluid as oxidation inhibitors/metal deactivators, lubricity additives and antirust additives. In. this effort, low energy configuration computer models of the base fluid and of selected additives were created Simulated docking of the additive molecules in the base fluid media, onto low carbon steel and onto iron oxide substrates, provided information on the strength of the substrate/additive interactions. Also, the visual representation of each additive molecule's alignment on the metallic surface has provided insight into selection of the optimum functionality in designing new additives. Data on the additive/metal attraction and corresponding additive effectiveness are presented. C1 ALLIED SIGNAL INC,DES PLAINES,IL 60017. RP Gschwender, L (reprint author), USAF,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433, USA. NR 17 TC 14 Z9 14 U1 0 U2 1 PU SOC TRIBOLOGISTS & LUBRICATION ENGINEERS PI PARK RIDGE PA 838 BUSSE HIGHWAY, PARK RIDGE, IL 60068 SN 0569-8197 J9 TRIBOL T JI Tribol. Trans. PD APR PY 1996 VL 39 IS 2 BP 368 EP 373 DI 10.1080/10402009608983540 PG 6 WC Engineering, Mechanical SC Engineering GA UB372 UT WOS:A1996UB37200017 ER PT J AU Lassen, PM Mokulis, JA Kearse, WS Caballero, RL Quinones, D AF Lassen, PM Mokulis, JA Kearse, WS Caballero, RL Quinones, D TI Conservative management of rectocutaneous fistula following radical perineal prostatectomy SO UROLOGY LA English DT Article AB Inadvertent rectal injury during radical perineal prostatectomy may sometimes lead to the development of a rectocutaneous fistula. This has traditionally been managed with diverting colostomy until closure of the fistula is assured. We report 3 cases of rectocutaneous fistula following radical perineal prostatectomy, which were managed in a more conservative fashion. This included appropriate wound care, antibiotics, bower rest, parenteral hyperalimentation, and, in the presence of a concomitant urine leak in 1 case, optimal urinary diversion and bed rest. All fistulas healed without incident. C1 WOMACK ARMY MED CTR,DEPT UROL,FT BRAGG,NC. RP Lassen, PM (reprint author), WILFORD HALL USAF MED CTR,PSSU,DEPT UROL,2200 BERGQUIST DR,SUITE 1,LACKLAND AFB,TX 78236, USA. NR 3 TC 5 Z9 5 U1 0 U2 0 PU CAHNERS PUBL CO PI NEW YORK PA 249 WEST 17 STREET, NEW YORK, NY 10011 SN 0090-4295 J9 UROLOGY JI UROLOGY PD APR PY 1996 VL 47 IS 4 BP 592 EP 594 DI 10.1016/S0090-4295(99)80503-2 PG 3 WC Urology & Nephrology SC Urology & Nephrology GA UM759 UT WOS:A1996UM75900031 PM 8638376 ER PT J AU Shah, MM Spain, JC AF Shah, MM Spain, JC TI Elimination of nitrite from the explosive 2,4,6-trinitrophenylmethylnitramine (tetryl) catalyzed by ferredoxin NADP oxidoreductase from spinach SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article ID ESCHERICHIA-COLI; REDUCTION; NITROREDUCTASE; PURIFICATION AB Nitroreductase enzymes generally catalyze the reduction of nitroaromatic compounds to the corresponding amines. In contrast, ferredoxin NADP oxidoreductase (FNR), glutathione reductase, xanthine oxidase, and cytochrome c reductase catalyze the NADPH dependent elimination of the nitramine nitro group from 2,4,6-trinitrophenylmethylnitramine to form N-methylpicramide (NMP). Nitrite elimination was inhibited under aerobic conditions. Our results suggest that under aerobic conditions, tetryl is enzymatically reduced to the nitroanion radical which is then involved in the reduction of molecular oxygen. Under anaerobic conditions, the radical is reduced to NMP and nitrite is eliminated. (C) 1996 Academic Press, Inc. C1 ARMSTRONG LAB,TYNDALL AFB,FL 32403. NR 40 TC 20 Z9 22 U1 1 U2 3 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0006-291X J9 BIOCHEM BIOPH RES CO JI Biochem. Biophys. Res. Commun. PD MAR 27 PY 1996 VL 220 IS 3 BP 563 EP 568 DI 10.1006/bbrc.1996.0443 PG 6 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA UE853 UT WOS:A1996UE85300014 PM 8607804 ER PT J AU Brady, C AF Brady, C TI Four NVG configurations tested SO AVIATION WEEK & SPACE TECHNOLOGY LA English DT Letter RP Brady, C (reprint author), HAWAII AIR NATL GUARD,199TH FIGHTER SQDN,HICKAM AFB,HI, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MCGRAW HILL INC PI NEW YORK PA 1221 AVENUE OF THE AMERICAS, NEW YORK, NY 10020 SN 0005-2175 J9 AVIAT WEEK SPACE TEC JI Aviat. Week Space Technol. PD MAR 25 PY 1996 VL 144 IS 13 BP 6 EP 6 PG 1 WC Engineering, Aerospace SC Engineering GA UB197 UT WOS:A1996UB19700006 ER PT J AU Sherman, LR Nemeth, JF Mills, SE Plamondon, TJ AF Sherman, LR Nemeth, JF Mills, SE Plamondon, TJ TI Chlorine disinfecting of dental unit water lines SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV SCRANTON,DEPT CHEM,SCRANTON,PA 18510. ARMSTRONG LAB,BROOKS AFB,TX 78235. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 10 EP CHAS PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48201757 ER PT J AU Nemeth, JF Sherman, LR Mills, SE Plamondon, TJ AF Nemeth, JF Sherman, LR Mills, SE Plamondon, TJ TI Analysis and decontamination of dental unit water lines. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARMSTRONG LAB,AL AOCD,BROOKS AFB,TX 78235. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 11 EP CHAS PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48201758 ER PT J AU Das, GP AF Das, GP TI Study of iodine-doped trans-polyacetylene. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USAF,WRIGHT LAB,MLBP,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 32 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501259 ER PT J AU Das, GP Yeates, AT Dudis, DS AF Das, GP Yeates, AT Dudis, DS TI A computational model to predict two-photon absorption resonances. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USAF,WRIGHT LAB,MLBP,WRIGHT PATTERSON AFB,OH 45433. SYSTRAN CORP,DAYTON,OH 45432. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 56 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48202247 ER PT J AU Duan, X Yeates, AT Dudis, DS AF Duan, X Yeates, AT Dudis, DS TI Calculation of polarizabilities and hyperpolarizabilities for small carbon-sulfur diffuse systems. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SYSTRAN CORP,DAYTON,OH 45432. USAF,WRIGHT LAB,MLBP,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 58 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48202249 ER PT J AU Trohalaki, S Pachter, R AF Trohalaki, S Pachter, R TI Partition coefficients and phase behavior for non-toxic ice inhibitors from quantum mechanical calculations and molecular dynamics simulations. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USAF,WRIGHT LAB,MAT DIRECTORATE,MLPJ,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 60 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48202251 ER PT J AU Buckner, SW Gord, JR AF Buckner, SW Gord, JR TI Exciplex fluorescence lifetime thermometry SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 COLUMBUS COLL,DEPT CHEM & GEOL,COLUMBUS,GA 31907. USAF,WRIGHT LAB,AERO PROPULS & POWER DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 69 EP ANYL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48200336 ER PT J AU Edwards, T AF Edwards, T TI Recent research results in high temperature fuels. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USAF,WRIGHT LAB,POSF,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 73 EP PETR PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48500916 ER PT J AU Feldkamp, JR AF Feldkamp, JR TI Partitioning of binary solvents on charged expandable clays. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 APPL RES ASSOC INC,TYNDALL AFB,FL 32403. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 80 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48202747 ER PT J AU Pachter, R Trohalaki, S AF Pachter, R Trohalaki, S TI Properties prediction of non-toxic ice inhibitors SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USAF,WRIGHT LAB,MLPJ,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 84 EP PETR PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48500927 ER PT J AU Evers, RC Helminiak, TE AF Evers, RC Helminiak, TE TI Poly(p-phenylenebenzobisthiazole) and poly(p-phenylenebenzobisoxazole) development. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USAF,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 115 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48202913 ER PT J AU Dudis, DS Yeates, AT AF Dudis, DS Yeates, AT TI The future of molecular modeling: Competitive with experiment? SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USAF,WRIGHT LAB,MLBP,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 140 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48202331 ER PT J AU Cooper, TM Cline, SM Campbell, AL Adams, WW AF Cooper, TM Cline, SM Campbell, AL Adams, WW TI Investigation of self assembled peptide dye complexes in the solution phase SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USAF,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 162 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501389 ER PT J AU Natarajan, LV Cooper, TM Stitzel, D AF Natarajan, LV Cooper, TM Stitzel, D TI Substituent effects in spiropyran photochromism: Acceleration of alpha-helix to coil transformation in light adapted poly(L-spiropyran glutamates) SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SCI APPLICAT INT CORP,DAYTON,OH 45431. USAF,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. WRIGHT STATE UNIV,DEPT CHEM,DAYTON,OH 45432. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 163 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501390 ER PT J AU Mather, PT Chaffee, KP Haddad, TS Lichtenhan, JD AF Mather, PT Chaffee, KP Haddad, TS Lichtenhan, JD TI Synthesis and characterization of a semiflexible thermotropic LCP end-capped with POSS-macromers. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 HUGHES STX CORP,EDWARDS AFB,CA 93524. USAF,PHILLIPS LAB,EDWARDS AFB,CA 93524. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 284 EP POLY PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501511 ER PT J AU Miller, RL Scott, BL Melo, MM Abney, KD Balaich, GJ AF Miller, RL Scott, BL Melo, MM Abney, KD Balaich, GJ TI New routes to C-substituted derivatives of cobalt dicarbollide. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CST 11,LOS ALAMOS,NM 87545. USAF ACAD,COLORADO SPRINGS,CO 80840. RI Chamberlin, Rebecca/A-1335-2011 OI Chamberlin, Rebecca/0000-0001-6468-7778 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 296 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203316 ER PT J AU Larmat, F Reynolds, JR AF Larmat, F Reynolds, JR TI Electronic and electrochemical properties of poly[bis(2-thienyl)-9,9'-didecylfluorene] and poly[bis(2-(3,4-ethylenedioxy)thienyl)-9,9'-didecylfluorene] SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV FLORIDA,CTR MACROMOLEC SCI & ENGN,DEPT CHEM,GAINESVILLE,FL 32611. USAF,WRIGHT LAB,MAT DIRECTORATE,POLYMER BRANCH,WRIGHT PATTERSON AFB,OH 45433. UNIV CINCINNATI,DEPT MAT SCI & ENGN,CINCINNATI,OH 45221. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 302 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501529 ER PT J AU Balaich, GJ Miller, RL Abney, KD AF Balaich, GJ Miller, RL Abney, KD TI Synthesis of cobalt dicarbollide derivatives for addition and condensation polymerization. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,NUCL & RADIOCHEM GRP,LOS ALAMOS,NM 87545. USAF ACAD,DEPT CHEM,COLORADO SPRINGS,CO 80840. RI Chamberlin, Rebecca/A-1335-2011 OI Chamberlin, Rebecca/0000-0001-6468-7778 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 390 EP INOR PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203407 ER PT J AU Simpson, WP Patterson, JH AF Simpson, WP Patterson, JH TI A multiple-tree search procedure for the resource-constrained project scheduling problem SO EUROPEAN JOURNAL OF OPERATIONAL RESEARCH LA English DT Article DE project management; project scheduling; parallel algorithms ID BRANCH; ALGORITHMS AB For over three decades, researchers have sought effective solution procedures for PERT/CPM types of scheduling problems under conditions of limited resource availability. This paper presents a procedure for this problem which takes advantage of the emerging technology provided by multiple parallel processors to find and verify an optimal schedule for a project under conditions of multiple resource constraints. In our approach, multiple solutions trees are searched simultaneously in the quest for a minimum duration schedule. Global upper and lower bound information in common memory is shared among processors, enabling one or several processors to prune potentially significant portions of its search tree based upon bounds discovered by a processor using a different search tree. Computational experience is reported both for problems in which resources are available in constant amounts per period, as well as the much more difficult problem in which the resources available are allowed to vary over the schedule horizon (e.g., travel, sick leave, assignment to other tasks or projects, and so forth). The modular multiple-tree search procedure described in this paper is quite general, permitting most types of existing serial search strategies to be adapted to this approach where multiple processors are available. C1 USAF,INST TECHNOL,DEPT QUANTITAT MANAGEMENT,WRIGHT PATTERSON AFB,OH 45433. INDIANA UNIV,DEPT OPERAT MANAGEMENT,BLOOMINGTON,IN 47405. NR 17 TC 9 Z9 10 U1 2 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0377-2217 J9 EUR J OPER RES JI Eur. J. Oper. Res. PD MAR 22 PY 1996 VL 89 IS 3 BP 525 EP 542 DI 10.1016/0377-2217(94)00247-9 PG 18 WC Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA UE791 UT WOS:A1996UE79100009 ER PT J AU Kwak, MK Sciulli, D AF Kwak, MK Sciulli, D TI Fuzzy-logic based vibration suppression control experiments on active structures SO JOURNAL OF SOUND AND VIBRATION LA English DT Article ID VARIABLE STRUCTURE SYSTEMS AB This paper is concerned with the fuzzy-logic based vibration suppression control of active structures equipped with piezoelectric sensors and actuators. The control methodology is based on the fuzzy logic control of the variable structure system type. The sufficient condition for the closed-loop stability of the decentralized fuzzy control for the system equipped with collocated sensors and actuators is derived from the sufficient condition of the decentralized collocated variable structure system control. Hence, it is concluded that the fuzzy control is in fact the variation of the variable structure system control in this case. Comparison of the variable structure system to the fuzzy control leads to a new fuzzy rule for the vibration suppression of the active structure equipped with collocated sensors and actuators. It is shown that the fuzzy-logic control can be designed for the collocated system without any knowledge of the system to be controlled. However, this may not be true in the case of multi-input and multi-output non-collocated systems. All the developments are demonstrated by means of a real-time fuzzy control experiment on the cantilever beam with surface-bonded piezoceramic sensors and actuators. (C) 1996 Academic Press Limited C1 USAF,PHILLIPS LAB,AFMC,DIV STRUCT & CONTROL,PL,VTSS,KIRTLAND AFB,NM 87117. RP Kwak, MK (reprint author), DONGGUK UNIV,DEPT MECH ENGN,26 PIL DONG 3 GA,JOONG GU,SEOUL 100715,SOUTH KOREA. NR 25 TC 35 Z9 38 U1 0 U2 6 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-460X J9 J SOUND VIB JI J. Sound Vibr. PD MAR 21 PY 1996 VL 191 IS 1 BP 15 EP 28 DI 10.1006/jsvi.1996.0104 PG 14 WC Acoustics; Engineering, Mechanical; Mechanics SC Acoustics; Engineering; Mechanics GA UB090 UT WOS:A1996UB09000002 ER PT J AU Wang, LP Grandhi, RV Canfield, RA AF Wang, LP Grandhi, RV Canfield, RA TI Multivariate hermite approximation for design optimization SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING LA English DT Article DE multi-point approximations; multivariate Hermite; optimization; design ID STRUCTURAL OPTIMIZATION AB An approximation based on multiple function and gradient information is developed using Hermite interpolation concepts. The goal is to build a high-quality approximation for complex and multidisciplinary design optimization problems employing analysis such as aeroservoelasticity, structural control, probability, etc. The proposed multidimensional approximation utilizes exact analyses data generated during the course of iterative optimization. The approximation possesses the property of reproducing the function and gradient information of known data points. The accuracy of the new approach is compared with linear, reciprocal and other standard approximations. Because the proposed algorithm uses more data points, its efficiency has to be compared in the context of iterative optimization. C1 USAF,INST TECHNOL,WRIGHT PATTERSON AFB,OH 45433. RP Wang, LP (reprint author), WRIGHT STATE UNIV,DEPT MECH & MAT ENGN,209 RC,DAYTON,OH 45435, USA. NR 15 TC 17 Z9 17 U1 0 U2 1 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0029-5981 J9 INT J NUMER METH ENG JI Int. J. Numer. Methods Eng. PD MAR 15 PY 1996 VL 39 IS 5 BP 787 EP 803 DI 10.1002/(SICI)1097-0207(19960315)39:5<787::AID-NME881>3.0.CO;2-5 PG 17 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications SC Engineering; Mathematics GA TX224 UT WOS:A1996TX22400004 ER PT J AU Maxwell, L Rodney, G Napier, W Atkins, J Anzueto, A AF Maxwell, L Rodney, G Napier, W Atkins, J Anzueto, A TI Allopurinol fails to protect rat diaphragm (DPH) from functional impairment during inspiratory resistive loading (IRL). SO FASEB JOURNAL LA English DT Meeting Abstract C1 UNIV TEXAS,HLTH SCI CTR,DEPT PHYSIOL,SAN ANTONIO,TX 78284. UNIV TEXAS,HLTH SCI CTR,DEPT MED,SAN ANTONIO,TX 78284. WILFORD HALL USAF MED CTR,SAN ANTONIO,TX 78236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 15 EP 15 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28400016 ER PT J AU Ryan, KL Walters, TJ Tehrany, MR Jauchem, JR AF Ryan, KL Walters, TJ Tehrany, MR Jauchem, JR TI Age does not affect thermal and cardiovascular responses to 35-GHz microwave heating SO FASEB JOURNAL LA English DT Meeting Abstract C1 TRINITY UNIV,DEPT BIOL,SAN ANTONIO,TX 78212. SYST RES LABS INC,BROOKS AFB,TX 78235. ARMSTRONG LAB,RADIOFREQUENCY RADIAT DIV,BROOKS AFB,TX 78235. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 684 EP 684 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28400686 ER PT J AU Skitek, EB Reddy, S Ryan, KL Tehrany, MR Frei, MR Jauchem, JR AF Skitek, EB Reddy, S Ryan, KL Tehrany, MR Frei, MR Jauchem, JR TI Inhibition of platelet-activating factor (PAF) during hypotension induced by 35-GHz microwave heating SO FASEB JOURNAL LA English DT Meeting Abstract C1 TRINITY UNIV,DEPT BIOL,SAN ANTONIO,TX 78212. ARMSTRONG LAB,RADIOFREQUENCY RADIAT DIV,BROOKS AFB,TX 78235. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 685 EP 685 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28400684 ER PT J AU Jauchem, JR Ryan, KL Lovelace, JD Frei, MR AF Jauchem, JR Ryan, KL Lovelace, JD Frei, MR TI Lethal heat stress induced by 35-GHz microwaves: Effects of beta(1)-adrenergic blockade with esmolol SO FASEB JOURNAL LA English DT Meeting Abstract C1 TRINITY UNIV,DEPT BIOL,SAN ANTONIO,TX 78212. USAF,ARMSTRONG LAB,BROOKS AFB,TX 78235. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 686 EP 686 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28400687 ER PT J AU Walters, TJ Mason, PA Ryan, KL Jones, MB Tehrany, MR Marrow, JD Merritt, J AF Walters, TJ Mason, PA Ryan, KL Jones, MB Tehrany, MR Marrow, JD Merritt, J TI The regional distribution of HSP7D following microwave and exertionally induced heat stress. SO FASEB JOURNAL LA English DT Meeting Abstract C1 ARMSTRONG LAB,RADIOFREQUENCY RADIAT DIV,SYST RES LABS,BROOKS AFB,TX 78235. TRINITY UNIV,DEPT BIOL,SAN ANTONIO,TX 78212. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 1510 EP 1510 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28401510 ER PT J AU Pelouch, WS Schlie, LA AF Pelouch, WS Schlie, LA TI Ultrafast carrier dynamics and saturable absorption in HgCdTe SO APPLIED PHYSICS LETTERS LA English DT Article ID RELAXATION; GAAS AB The ultrafast carrier dynamics in Hg0.6Cd0.4Te and Hg0.33Cd0.67Te are studied using a femtosecond optical parametric oscillator and the optical transmission-correlation spectroscopy method. The band gaps of these materials are 2.85 mu m (0.435 eV) and 1.47 mu m (0.844 eV) at room temperature, respectively. The collective relaxation occurs within the 0.5 to 2 ps range and a fast scattering process is observed in the 150 to 200 fs range. Saturation effects are detected in the 0.844 eV band gap sample resulting in a transmission maxima near 2 ps in addition to the standard transmission peak at zero time delay. The magnitude of the saturable absorption is also measured as a function of carrier density and initial kinetic energy of the photoexcited carriers. RP Pelouch, WS (reprint author), USAF,PHILLIPS LAB,LASER & IMAGING DIRECTORATE,KIRTLAND AFB,NM 87117, USA. NR 8 TC 21 Z9 21 U1 2 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 4 PY 1996 VL 68 IS 10 BP 1389 EP 1391 DI 10.1063/1.116089 PG 3 WC Physics, Applied SC Physics GA TX861 UT WOS:A1996TX86100027 ER PT J AU Shang, JS AF Shang, JS TI Computational electromagnetics SO ACM COMPUTING SURVEYS LA English DT Article RP Shang, JS (reprint author), WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433, USA. NR 4 TC 1 Z9 1 U1 0 U2 0 PU ASSOC COMPUTING MACHINERY PI NEW YORK PA 1515 BROADWAY, NEW YORK, NY 10036 SN 0360-0300 J9 ACM COMPUT SURV JI ACM Comput. Surv. PD MAR PY 1996 VL 28 IS 1 BP 97 EP 99 DI 10.1145/234313.234357 PG 3 WC Computer Science, Theory & Methods SC Computer Science GA UP968 UT WOS:A1996UP96800021 ER PT J AU Tsang, PS Velazquez, VL Vidulich, MA AF Tsang, PS Velazquez, VL Vidulich, MA TI Viability of resource theories in explaining time-sharing performance SO ACTA PSYCHOLOGICA LA English DT Article; Proceedings Paper CT Human-Factors-Society 36th Annual Meeting CY OCT 12-16, 1992 CL ATLANTA, GA SP Human Factors Soc DE divided attention; tracking; time-sharing performance; multiple resources; attention allocation control ID MULTIPLE RESOURCES; SUBJECTIVE MEASURES; ATTENTION; TRACKING; STRATEGIES; WORKLOAD; COMPATIBILITY; DIFFICULTY; MODALITIES; CAPACITY AB The primary objective of the present research was to test for performance tradeoff induced by priority instructions with the purportedly unbiased optimum-maximum method. In Experiment 1, performance tradeoff was observed when the tracking task was optimized but not when the Sternberg memory task was optimized, It was hypothesized that the tracking task was protected by peripheral vision when subjects focused on the optimized memory task. The second experiment tested the generality of the results with additional variations of the task pairs selected to represent different degrees of shared resources. The extent of performance tradeoff and time-sharing efficiency varied systematically with the extent of predicted resource overlap between the time-shared tasks, The observed performance tradeoff was strongly indicative of subjects' voluntary allocation control. Further, subjective ratings suggested that such control was effortful. These results were supportive of multiple resource theories and the viability of resource explanation of task interference. C1 USAF,ARMSTRONG LAB,HUMAN ENGN DIV,DAYTON,OH. RP Tsang, PS (reprint author), WRIGHT STATE UNIV,DEPT PSYCHOL,DAYTON,OH 45430, USA. FU NIA NIH HHS [AG08589] NR 64 TC 18 Z9 18 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0001-6918 J9 ACTA PSYCHOL JI Acta Psychol. PD MAR PY 1996 VL 91 IS 2 BP 175 EP 206 DI 10.1016/0001-6918(94)00055-7 PG 32 WC Psychology, Experimental SC Psychology GA UM056 UT WOS:A1996UM05600005 PM 8677806 ER PT J AU Baker, WP Eldred, LB Palazotto, AN AF Baker, WP Eldred, LB Palazotto, AN TI Viscoelastic material response with a fractional-derivative constitutive model SO AIAA JOURNAL LA English DT Article ID CALCULUS AB A rubber coupon is modeled as a viscoelastic material by a fractional derivative constitutive law to capture the material behavior over a broad frequency range. The coupon, of finite length, is clamped at one end and subject to either a forced loading or a deflection at the other end. The physical response profile of the material for this distributed model is examined in terms of a relaxation response, associated with a branch-cut integration, and a modal response. RP Baker, WP (reprint author), USAF,INST TECHNOL,WRIGHT PATTERSON AFB,OH 45433, USA. NR 11 TC 9 Z9 9 U1 0 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0001-1452 J9 AIAA J JI AIAA J. PD MAR PY 1996 VL 34 IS 3 BP 596 EP 600 DI 10.2514/3.13109 PG 5 WC Engineering, Aerospace SC Engineering GA TZ293 UT WOS:A1996TZ29300025 ER PT J AU Tromp, JC Beran, PS AF Tromp, JC Beran, PS TI Temporal evolution of three-dimensional vortex breakdown from steady, axisymmetric solutions SO AIAA JOURNAL LA English DT Article C1 USAF,INST TECHNOL,DEPT AERONAUT & ASTRONAUT,WRIGHT PATTERSON AFB,OH 45433. NR 10 TC 5 Z9 5 U1 0 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0001-1452 J9 AIAA J JI AIAA J. PD MAR PY 1996 VL 34 IS 3 BP 632 EP 634 DI 10.2514/3.13117 PG 3 WC Engineering, Aerospace SC Engineering GA TZ293 UT WOS:A1996TZ29300033 ER PT J AU Grayson, JK AF Grayson, JK TI Radiation exposure, socioeconomic status, and brain tumor risk in the US Air Force: A nested case-control study SO AMERICAN JOURNAL OF EPIDEMIOLOGY LA English DT Article DE brain neoplasms; case-control studies; electromagnetic fields; military personnel; occupational exposure; socioeconomic status ID LOS-ANGELES COUNTY; OCCUPATIONAL EXPOSURE; CANCER MORTALITY; DESCRIPTIVE EPIDEMIOLOGY; ELECTROMAGNETIC-FIELDS; CRANIAL MENINGES; DEATH; WORKERS; LEUKEMIA; COHORT AB A nested case-control study was used to investigate the relation between a range of electromagnetic field exposures and brain tumor risk in the US Air Force. Cumulative extremely low frequency and radiofrequency/microwave electromagnetic field potential exposures were estimated from a job-exposure matrix developed for this study. Ionizing radiation exposures were obtained from personal dosimetry records. Men who were exposed to nonionizing electromagnetic fields had a small excess risk for developing brain tumors, with the extremely low frequency and radiofrequency/microwave age-race-senior military rank-adjusted odds ratios being 1.28 (95% confidence interval (CI) 0.95-1.74) and 1.39 (95% CI 1.01-1.90), respectively. By contrast, men who were exposed to ionizing radiation had an age-race-senior military rank-adjusted odds ratio of 0.58 (95% CI 0.22-1.52), These results support a small association between extremely low frequency and radiofrequency/microwave electromagnetic field exposure and no association between ionizing radiation exposure and brain tumors in the US Air Force population, Military rank was consistently associated with brain tumor risk, Officers were more likely than enlisted men to develop brain tumors (age-race-adjusted odds ratio (OR) = 2.11, 95% CI 1.48-3.01), and senior officers were at increased risk compared with all other US Air Force members (age-race-adjusted OR = 3.30, 95% CI 1.99-5.45). RP Grayson, JK (reprint author), USAF,ARMSTRONG LAB,OEMO,2402 E DR,BROOKS AFB,TX 78235, USA. NR 34 TC 78 Z9 83 U1 1 U2 3 PU AMER J EPIDEMIOLOGY PI BALTIMORE PA 624 N BROADWAY RM 225, BALTIMORE, MD 21205 SN 0002-9262 J9 AM J EPIDEMIOL JI Am. J. Epidemiol. PD MAR 1 PY 1996 VL 143 IS 5 BP 480 EP 486 PG 7 WC Public, Environmental & Occupational Health SC Public, Environmental & Occupational Health GA TZ598 UT WOS:A1996TZ59800008 PM 8610663 ER PT J AU Smith, DK Murray, PM AF Smith, DK Murray, PM TI Avulsion fractures of the volar aspect of triquetral bone of the wrist: A subtle sign of carpal ligament injury SO AMERICAN JOURNAL OF ROENTGENOLOGY LA English DT Article AB OBJECTIVE. We report five examples of a triquetral fracture pattern not previously described to our knowledge. These fractures from the volar aspect of the triquetral bone are important because they are easily missed with conventional wrist radiographs and yet are associated with significant ligament injuries and carpal instability. MATERIALS AND METHODS. Five volar triquetral avulsion fractures occurred in young men (20-28 years old) during falls while playing sports. The initial evaluation consisted of a three-view radiographic series. Subsequently, an instability series was obtained in each case. Four patients were also evaluated by stress videofluoroscopy and arthrography, one by CT, and four by MR imaging. RESULTS. None of the five fractures was recognized on radiographs obtained in the emergency room. Each fracture was identified on an instability series and involved the radial aspect of the volar surface of the triquetral bone. All four wrists evaluated by stress videofluoroscopy showed lunatotriquetral joint instability. One also showed instability of the scapholunate joint. All four wrists evaluated by arthrography showed tears of the lunatotriquetral ligament and three had an associated tear of the scapholunate ligament. MR examination of four wrists showed a volar capsular ligament attached to the avulsion fracture fragment in each wrist. Two of the patients were treated by arthroscopic debridement and three were treated by prolonged splinting. All five patients had persistent pain and carpal instability of variable severity at least 1 year after injury. CONCLUSION. This avulsion fracture of the radial aspect of the volar triquetral bone is a subtle, easily missed sign of a significant injury of the perilunate ligaments. When this fracture is identified, we recommend further evaluation for associated ligament injury and carpal instability. C1 WILFORD HALL USAF MED CTR,PSSB,DEPT ORTHOPED SURG,SAN ANTONIO,TX 78236. MECKLENBURG RADIOL ASSOCIATES,CHARLOTTE,NC 28204. NR 11 TC 11 Z9 11 U1 0 U2 2 PU AMER ROENTGEN RAY SOC PI RESTON PA 1891 PRESTON WHITE DR SUBSCRIPTION FULFILLMENT, RESTON, VA 22091 SN 0361-803X J9 AM J ROENTGENOL JI Am. J. Roentgenol. PD MAR PY 1996 VL 166 IS 3 BP 609 EP 614 PG 6 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA TW774 UT WOS:A1996TW77400022 PM 8623636 ER PT J AU Kelleher, WJ Talcott, GW Haddock, CK Freeman, RK AF Kelleher, WJ Talcott, GW Haddock, CK Freeman, RK TI Military psychology in the age of managed care: The Wilford Hall model SO APPLIED & PREVENTIVE PSYCHOLOGY LA English DT Article DE managed care; behavioral health; psychoeducational treatment; cognitive-behavioral treatment ID COGNITIVE THERAPY; PANIC DISORDER; META-ANALYSIS; PSYCHOTHERAPY; DEPRESSION; EFFICACY AB Military medicine is currently being overhauled through Tricare, a comprehensive, managed care program designed to reduce costs and increase clients' access to health care. This article presents reforms initiated by the psychologists at Wilford Hall Medical Center, the largest military hospital in the world, in response to Tricare. These reforms have resulted in adult, outpatient services that are immediately accessible, effective, and cost efficient. The Wilford Hall approach to psychological services is offered as model that can be used in other outpatient settings. Additionally, potential limitations of this approach to psychological care are presented. C1 WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236. NR 41 TC 10 Z9 10 U1 0 U2 1 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0962-1849 J9 APPL PREV PSYCHOL JI Appl. Prev. Psychol. PD SPR PY 1996 VL 5 IS 2 BP 101 EP 110 DI 10.1016/S0962-1849(96)80003-5 PG 10 WC Psychology, Clinical; Psychology, Applied SC Psychology GA UJ463 UT WOS:A1996UJ46300003 ER PT J AU Bendrick, GA Ainscough, MJ Pilmanis, AA Bisson, RU AF Bendrick, GA Ainscough, MJ Pilmanis, AA Bisson, RU TI Prevalence of decompression sickness among U-2 pilots SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID BUBBLES; TRIAL AB Background: Though it is rarely reported, decompression sickness (DCS) is an expected risk for U-2 aviators. The potential for chronic sequelae of untreated DCS in this population has never been addressed. Methods: After conducting a preliminary survey at an active-duty U-2 squadron, a cohort of 416 U-2 pilots (active-duty and retired) were mailed two sequential anonymous surveys to assess demographic data, career prevalence of DCS symptoms, and overall health status with an emphasis on chronic musculoskeletal problems. Results The response rate for each mail-in survey was over 60%. During their career, 75.5% of pilots experienced DCS symptoms such as joint pain, skin manifestations, and/or various neurological problems. Symptoms generally started during flight and resolved upon descent. Many pilots voluntarily increased their oxygen prebreathing time, or inflated the pressure suit during flight to prevent or treat symptoms. At some point in their career 12.7% of those experiencing symptoms either altered the flight profile or aborted a mission as a result The association of past DCS with current arthritic problems was not statistically significant. Conclusions The career prevalence of DCS symptoms in U-2 pilots is higher than previously reported, and these symptoms sometimes affect mission completion. We found no evidence that chronic musculoskeletal sequelae (e.g., arthritis or dysbaric osteonecrosis) are causally associated with DCS in this population. C1 USAF,ARMSTRONG LAB,BROOKS AFB,TX 78235. RP Bendrick, GA (reprint author), USAF,SCH AEROSP MED,2513 KENNEDY CIRCLE,BROOKS AFB,TX 78235, USA. NR 21 TC 37 Z9 38 U1 0 U2 0 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD MAR PY 1996 VL 67 IS 3 BP 199 EP 206 PG 8 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TY364 UT WOS:A1996TY36400001 PM 8775396 ER PT J AU Carretta, TR James, H AF Carretta, TR James, H TI US Air Force pilot selection tests: What is measured and what is predictive? SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID INTELLIGENCE; MEMORY AB Selection of military pilots has long included the use of multiple aptitude test batteries. Although the names and appearances of the tests used in pilot selection vary, most are to a large extent measures of general cognitive ability, or g. This is consistent with the central role played by cognitive ability measures in the prediction of numerous job training (r = 0.43) and performance (r = 0.34) criteria. Measures of specific cognitive abilities (e.g., verbal, quantitative, spatial, perceptual speed) have shown little incremental validity beyond g (increase in correlation of about 0.02). The incremental validity, beyond g, of measures of pilot job knowledge (e.g., aviation concepts, instruments, principles and terms; increase in correlation beyond g of about 0.08), psychomotor abilities, and personality scores (increase in correlation beyond g between 0.02 and 0.04) also has been small, but significant. The unavoidable requirement to reason in responding to test material causes gto be measured. In broad-ability-range samples; the positive correlations of the measures demonstrate that general cognitive ability is always present as a higher-order factor. Future measures of pilot aptitude may include tests based on cognitive components, chronometric methods, neural conductive velocity, or Ether methods. These measures, despite their appearance, have been shown to mostly measure g. Subsequently, we expect that future U.S. Air Force pilot selection tests will mostly be measures of g and will, therefore, continue to be predictive of performance. C1 HUMAN RESOURCES DIRECTORATE,ARMSTRONG LAB,AIRCREW SELECT RES BRANCH,BROOKS AFB,TX 78235. NR 31 TC 9 Z9 10 U1 0 U2 1 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD MAR PY 1996 VL 67 IS 3 BP 279 EP 283 PG 5 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TY364 UT WOS:A1996TY36400016 PM 8775411 ER PT J AU Cannistraci, LW AF Cannistraci, LW TI A C-130 flight on a dirt runway SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article RP Cannistraci, LW (reprint author), USAF,SCH AEROSP MED,AN,NC,8005 LINDBERG DR,BROOKS AFB,TX 78235, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD MAR PY 1996 VL 67 IS 3 BP 287 EP 288 PG 2 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TY364 UT WOS:A1996TY36400017 ER PT J AU Rowan, AB Andrasik, F AF Rowan, AB Andrasik, F TI Efficacy and cost-effectiveness of minimal therapist contact treatments of chronic headaches: A review SO BEHAVIOR THERAPY LA English DT Article ID COGNITIVE BEHAVIORAL TREATMENT; NON-DRUG TREATMENTS; TENSION HEADACHE; BIOFEEDBACK TREATMENT; THERMAL BIOFEEDBACK; REFRACTORY HEADACHE; PEDIATRIC MIGRAINE; VASCULAR HEADACHE; PHARMACOLOGICAL TREATMENT; RELAXATION TREATMENT AB Minimal contact (MC) largely self-administered treatments are being increasingly studied for management of recurrent headache disorders. To date, systematic review of these treatment approaches is lacking. This paper examines and critically analyzes MC studies for adult and child tension-type and migraine headaches. With rare exceptions, benefits from MC treatments have been found to rival those of the more time- and effort-intensive standard, in-clinic treatment approaches. Implications of these findings and recommendations for clinical practice and research are discussed. C1 UNIV W FLORIDA,DEPT PSYCHOL,CTR BEHAV MED,PENSACOLA,FL 32514. RP Rowan, AB (reprint author), WILFORD HALL USAF MED CTR,59TH MED WING PSCPB,2200 BERGQIOST DR,SUITE 1,LACKLAND AFB,TX 78236, USA. NR 64 TC 40 Z9 40 U1 1 U2 1 PU ASSOC ADV BEHAVIOR THERAPY PI NEW YORK PA 305 7TH AVE #16A, NEW YORK, NY 10001-6008 SN 0005-7894 J9 BEHAV THER JI Behav. Therapy PD SPR PY 1996 VL 27 IS 2 BP 207 EP 234 DI 10.1016/S0005-7894(96)80015-3 PG 28 WC Psychology, Clinical SC Psychology GA VD042 UT WOS:A1996VD04200006 ER PT J AU Goodpaster, AJ Berman, H Blechman, BM Burns, WF Horner, CA Jeffords, JM Krepon, M McNamara, RS Marshall, W Nitze, PH Nolan, JE Odeen, PA Ridgway, RL Sagan, SD Smith, WY Steinbruner, J Utgoff, V AF Goodpaster, AJ Berman, H Blechman, BM Burns, WF Horner, CA Jeffords, JM Krepon, M McNamara, RS Marshall, W Nitze, PH Nolan, JE Odeen, PA Ridgway, RL Sagan, SD Smith, WY Steinbruner, J Utgoff, V TI A four-step program to nuclear disarmament SO BULLETIN OF THE ATOMIC SCIENTISTS LA English DT Article C1 USA,WAR COLL,WASHINGTON,DC 20310. US SPACE COMMAND,COLORADO SPRINGS,CO. USAF,SPACE COMMAND,WASHINGTON,DC 20330. BROOKINGS INST,FOREIGN POLICY STUDIES PROGRAM,WASHINGTON,DC 20036. INST DEF ANAL,STRATEGY FORCES RESOURCE DIV,PRINCETON,NJ. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDUC FOUNDATION NUCLEAR SCI PI CHICAGO PA 6042 SOUTH KIMBARK, CHICAGO, IL 60637 SN 0096-3402 J9 B ATOM SCI JI Bull. Atom. Scient. PD MAR-APR PY 1996 VL 52 IS 2 BP 52 EP 55 PG 4 WC International Relations; Social Issues SC International Relations; Social Issues GA TZ909 UT WOS:A1996TZ90900021 ER PT J AU Demme, RA AF Demme, RA TI Organs for undocumented aliens - Another look: Response to ''distributing American hearts for transplantation: The predicament of living in the global village'' SO CAMBRIDGE QUARTERLY OF HEALTHCARE ETHICS LA English DT Article C1 WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236. RP Demme, RA (reprint author), USAF,MED CORPS,LACKLAND AFB,TX 78236, USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0963-1801 J9 CAMB Q HEALTHC ETHIC JI Camb. Q. Healthc. Ethics PD SPR PY 1996 VL 5 IS 2 BP 281 EP 283 PG 3 WC Health Care Sciences & Services; Health Policy & Services; Social Sciences, Biomedical SC Health Care Sciences & Services; Biomedical Social Sciences GA UG115 UT WOS:A1996UG11500012 PM 8718736 ER PT J AU Trohalaki, S Chabinyc, ML Resch, TJ Fratini, AV Vance, TA Arnold, FE Dudis, DS AF Trohalaki, S Chabinyc, ML Resch, TJ Fratini, AV Vance, TA Arnold, FE Dudis, DS TI Effects of methyl substitution on the structure and rotational barrier in the rigid-rod polymer poly(p-phenylenebenzobisthiazole) SO CHEMISTRY OF MATERIALS LA English DT Article ID MOLECULAR-ORBITAL CALCULATIONS; HIGH-STRENGTH; FIBERS; 2,6-BENZOBISTHIAZOLE; UNITS AB X-ray crystallographic and ab initio molecular orbital analyses are presented for three model compounds of methyl-substituted poly(p-phenylenebenzobisthiazole), PBZT, where monomethyl and dimethyl substitutents are located on the phenylene moiety. The barrier to phenylene rotation, a factor considered to be important for an understanding of the mechanical, electronic, and nonlinear optical properties of PBZT and related rigid-rod heterocyclic polymers, is calculated for each compound. Ortho substitution with a monomethyl group substantially lowers the rotational barrier and profoundly changes the shape of the rotational potential, whereas meta substitution has only a negligible effect. Discrepancies between experimental and theoretical phenyl torsion angles are attributed to crystal packing forces. Ab initio results differ quantitatively from semiempirical molecular orbital findings. Good agreement is observed between crystallographic and computed bond lengths and angles. C1 UNIV DAYTON,DEPT CHEM,DAYTON,OH 45469. ADTECH SYST RES INC,DAYTON,OH 45432. UNIV DAYTON,RES INST,DAYTON,OH 45469. WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. RI Chabinyc, Michael/E-2387-2011 NR 31 TC 1 Z9 1 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD MAR PY 1996 VL 8 IS 3 BP 714 EP 720 DI 10.1021/cm9503902 PG 7 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA UA826 UT WOS:A1996UA82600018 ER PT J AU Martin, JY Dean, DD Cochran, DL Simpson, J Boyan, BD Schwartz, Z AF Martin, JY Dean, DD Cochran, DL Simpson, J Boyan, BD Schwartz, Z TI Proliferation, differentiation, and protein synthesis of human osteoblast-like cells (MG63) cultured on previously used titanium surfaces SO CLINICAL ORAL IMPLANTS RESEARCH LA English DT Article DE implant; titanium; osteoblasts; differentiation; biocompatibility ID BONE; IMPLANTS; GROWTH; TISSUE; INTERFACE; COLLAGEN AB This study compared osteoblast proliferation, differentiation, and protein synthesis on new and used titanium (Ti) disks to test the hypothesis that cleaning and resterilization of previously used Ti disks does not alter cell response to a particular surface. Ti disks of varying roughness were prepared by one of five different treatment regimens. Standard tissue culture plastic was used as a control. Human osteoblast-like cells (MG63) were cultured on the Ti disks and cell proliferation, cell differentiation, RNA synthesis and matrix production (collagen and noncollagen protein, proteoglycans) measured. After their first use, the disks were cleaned, resterilized by autoclaving, and MG63 cells cultured on them as before. At confluence, the same parameters were measured and cell behavior on new and used disks compared. When confluent cultures of cells on plastic were compared to those cultured on new Ti surfaces, cell number was reduced on the roughest surfaces and equivalent to plastic on the other surfaces. Cell number was further reduced when disks with the roughest surfaces were re-used; no differences in cell number could be discerned after cleaning and resterilization. Cell proliferation was inversely related to surface roughness and was less than seen on tissue culture plastic. Re-use of the Ti disks resulted in no change in cell proliferation rate. Alkaline phosphatase specific activity in isolated cells was lowest on the rougher surfaces; no differences between new and used disks were observed. Similarly enzyme activity in the cell layer was decreased in cultures grown on rougher surfaces, with no effect of prior disk use being noted. RNA synthesis was decreased with respect to plastic in cultures on smoother surfaces and increased on rougher surfaces; prior disk use did not alter RNA synthesis. Collagen production by the cells was decreased on smoother surfaces, but was comparable to tissue culture plastic when grown on rougher surfaces. Noncollagen protein production was unaffected by culture surface and whether or not the disk had been previously used. Proteoglycan synthesis by cells was decreased on all surfaces studied and comparable on both new and used disks. The results of this study indicate that Ti implant surfaces are unaffected by cleaning and resterilization, although rougher surfaces may require more extensive cleaning than smoother ones. This suggests the possibility that implants, in the same patient, could be safely reused. In vivo studies in animals, however, need to be performed before clinical application can be considered. C1 WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236. OI Dean, David/0000-0002-4512-9065 NR 35 TC 79 Z9 79 U1 0 U2 8 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0905-7161 J9 CLIN ORAL IMPLAN RES JI Clin. Oral Implant. Res. PD MAR PY 1996 VL 7 IS 1 BP 27 EP 37 DI 10.1034/j.1600-0501.1996.070104.x PG 11 WC Dentistry, Oral Surgery & Medicine; Engineering, Biomedical SC Dentistry, Oral Surgery & Medicine; Engineering GA UD104 UT WOS:A1996UD10400004 PM 9002820 ER PT J AU Dolan, S Derdak, S Solomon, D Farmer, C Johanningman, J Gelineau, J Smith, RB AF Dolan, S Derdak, S Solomon, D Farmer, C Johanningman, J Gelineau, J Smith, RB TI Tracheal gas insufflation combined with high-frequency oscillatory ventilation SO CRITICAL CARE MEDICINE LA English DT Article DE high-frequency oscillatory ventilation; lung injury; mechanical ventilation; adult respiratory distress syndrome; barotrauma; hypercapnia; atelectasis; positive end expiratory pressure ID RESPIRATORY-DISTRESS SYNDROME; END-EXPIRATORY PRESSURE; MECHANICAL VENTILATION; AIRWAY PRESSURES; PULMONARY-EDEMA; CO2 REMOVAL; LUNG LAVAGE; FAILURE; DOGS; OXYGENATION AB Objectives: To determine the efficacy of tracheal gas insufflation delivered by two different catheter designs on CO2 elimination when used in conjunction with high-frequency oscillatory ventilation. Design: A nonrandomized before and after trial. Each animal served as his own control. Subjects: Ten mongrel dogs weighing 20.9 +/- 1.9 kg. Four animals were assigned to a normal lung group and six animals underwent lung injury by large volume saline lavage. Intervention: Permissive hypercapnia was allowed to occur by selecting oscillator settings that would lead to alveolar hypoventilation. Proximal mean airway pressure was kept constant. Tracheal gas was insufflated at 1 cm above the carina for 30-min periods at gas flows of 5 to 15 L/min. Measurements and Main Results: Carinal pressure, hemodynamic parameters (cardiac output, mean arterial pressure, pulmonary arterial pressure, pulmonary artery occlusion pressure), and gas exchange parameters (PacO(2), PaO2, PaO2/FIO2, shunt fraction, DO2) were measured. For the normal dogs, at catheter flow of 15 L/min, the forward thrust catheter increased carinal pressure and PaO2/FIO2 by 30% (p < .003) and 105% (p < .005), respectively. The forward thrust catheter reduced PacO(2) by 40% (p < .04). The reverse thrust catheter increased PaO2/FIO2 by 102% (p < .001) and decreased carinal pressure and PacO(2) by 44% (p < .001) and 34% (p < .003), respectively. For the injured dogs, at catheter flow rate of 15 L/min, the forward thrust catheter increased carinal pressure, PaO2, and PaO2/FIO2 by 6% (p < .001), 23% (p < .001) and 24% (p < .02), respectively. The forward thrust catheter reduced PacO(2) by 29% (p < .002). The reverse thrust catheter increased PaO2 and PaO2/FIO2 both by 11% (p < .02) and reduced carinal pressure and PacO(2) by 23% (p < .001) acid 18% (p < .002), respectively. Conclusions: Tracheal gas insufflation is capable of improving oxygenation and ventilation in acute lung injury when combined with high frequency oscillatory ventilation. The addition of this second gas flow at the level of the carina raises or lowers distal airway pressure, the magnitude of which is dependent on the direction and rate of gas flow. The beneficial effects of tracheal gas insufflation may be tempered by the long-term effects of altering distal airway pressure; lowering distal airway pressure may lead to atelectasis, whereas raising distal airway pressure may lead to an auto-positive end-expiratory pressure (auto-PEEP) effect. C1 WILFORD HALL USAF MED CTR,DEPT CRIT CARE MED,LACKLAND AFB,TX 78236. UNIV TEXAS,HLTH SCI CTR,DEPT ANESTHESIA,SAN ANTONIO,TX. RP Dolan, S (reprint author), WILFORD HALL USAF MED CTR,DEPT PULM,LACKLAND AFB,TX 78236, USA. NR 32 TC 16 Z9 18 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0090-3493 J9 CRIT CARE MED JI Crit. Care Med. PD MAR PY 1996 VL 24 IS 3 BP 458 EP 465 DI 10.1097/00003246-199603000-00016 PG 8 WC Critical Care Medicine SC General & Internal Medicine GA UB546 UT WOS:A1996UB54600016 PM 8625635 ER PT J AU Hayworth, JS Burris, DR AF Hayworth, JS Burris, DR TI Modeling cationic surfactant transport in porous media SO GROUND WATER LA English DT Article ID SOLUTE TRANSPORT; ADSORPTION; SMECTITE AB Laboratory and field experiments have shown that cationic surfactants can be used to modify aquifer materials, and thereby form zones of enhanced sorption for hydrophobic organic contaminants (HOC's) migrating in ground water. Coupled to a contaminant degradation or removal process, this concept has potential as a remediation technology,In order to apply enhanced sorption in a remediation scheme, an ability to predict the transport and partitioning behavior of cationic surfactants in the subsurface is necessary, In this paper we present the results of a numerical modeling study in which the transport and partitioning behavior of the cationic surfactant hexadecyltrimethylammonium chloride (HDTMA) in porous media is investigated. Modeling of previously published batch and column HDTMA sorption experimental results for Columbus Air Force Base aquifer material indicates that, under certain conditions, kinetic effects will dominate the transport process with slow desorption of HDTMA being the likely rate-controlling step. The results suggest that a significant departure from equilibrium will exist under natural gradient conditions for the Columbus aquifer material, Low aqueous surfactant concentrations can be expected to persist within a surfactant-enhanced sorption zone, even after considerable flushing with surfactant-free ground water. The low aqueous concentration may have implications in terms of toxicity to microorganisms. C1 USAF,ARMSTRONG LAB,TYNDALL AFB,FL 32403. RP Hayworth, JS (reprint author), APPL RES ASSOCIATES INC,POB 40128,BLDG 1142,TYNDALL AFB,FL 32403, USA. NR 29 TC 11 Z9 11 U1 0 U2 0 PU GROUND WATER PUBLISHING CO PI WESTERVILLE PA 601 DEMPSEY RD, WESTERVILLE, OH 43081 SN 0017-467X J9 GROUND WATER JI Ground Water PD MAR-APR PY 1996 VL 34 IS 2 BP 274 EP 282 DI 10.1111/j.1745-6584.1996.tb01887.x PG 9 WC Geosciences, Multidisciplinary; Water Resources SC Geology; Water Resources GA TY223 UT WOS:A1996TY22300010 ER PT J AU Williams, HP Hutchinson, S Wickens, CD AF Williams, HP Hutchinson, S Wickens, CD TI A comparison of methods for promoting geographic knowledge in simulated aircraft navigation SO HUMAN FACTORS LA English DT Article ID DESIGN; MEMORY AB In two experiments we evaluated different techniques for flight rehearsal to develop navigational knowledge about a region. In Experiment 1 different groups of pilots studied a map of a region, actively flew an IRIS simulator through the same region, or passively viewed the same dynamic screen as flown by the active participants. The latter two groups were subdivided into those that trained with high and low levels of scene detail. All pilots then transferred to a high-image-fidelity simulation to fly the same route. The transfer results indicated no effect of scene detail and that the active group performed best, the passive group worst, and the map group at an intermediate level. In Experiment 2 the workload of training was increased, and half the participants were required to train with a north-up map. These changes degraded the transfer performance of the active training group relative to the other two. The implications of the results for workload during rehearsal flights and the kinds of geographical knowledge acquired are discussed. C1 UNIV ILLINOIS,AVIAT RES LAB,SAVOY,IL 61874. USN,NAS,PENSACOLA,FL. USAF,WILLIAMS AFB,AZ. NR 28 TC 13 Z9 13 U1 0 U2 1 PU HUMAN FACTORS SOC PI SANTA MONICA PA BOX 1369, SANTA MONICA, CA 90406 SN 0018-7208 J9 HUM FACTORS JI Hum. Factors PD MAR PY 1996 VL 38 IS 1 BP 50 EP 64 DI 10.1518/001872096778940804 PG 15 WC Behavioral Sciences; Engineering, Industrial; Ergonomics; Psychology, Applied; Psychology SC Behavioral Sciences; Engineering; Psychology GA UP375 UT WOS:A1996UP37500004 ER PT J AU Rea, C Settle, MA AF Rea, C Settle, MA TI An automated test approach for US Air Force fighter engines SO IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE LA English DT Article; Proceedings Paper CT Conference on System Readiness - Test Technology for the 21st-Century (AUTOTESCON 95) CY AUG 07-10, 1995 CL ATLANTA, GA SP AESS, Instrumentat & Measurement Soc AB In an effort to support the Air Force's new F-22 Fighter aircraft with its dual F119-PW-100 jet engines, a new approach has been taken to realize the benefits of automated jet engine testing. This paper describes an automated test approach that is currently under development and will be used by the Air Force to test the F119 Jet engine. It also identifies the equipment, methods and techniques that are being employed to accomplish this task. C1 PRATT & WHITNEY AIRCRAFT,CUSTOMER SUPPORT & SERV,W PALM BEACH,FL 33410. RP Rea, C (reprint author), AERONAUT SYST CTR,YFZS,SYST PROGRAM OFF F22,BLDG 50,2130 5TH AVE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 3 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0885-8985 J9 IEEE AERO EL SYS MAG JI IEEE Aerosp. Electron. Syst. Mag. PD MAR PY 1996 VL 11 IS 3 BP 24 EP 28 DI 10.1109/62.486733 PG 5 WC Engineering, Aerospace; Engineering, Electrical & Electronic SC Engineering GA TY247 UT WOS:A1996TY24700007 ER PT J AU Bossert, DJ Gallant, D AF Bossert, DJ Gallant, D TI Gain, refractive index, and alpha-parameter in InGaAs-GaAs SQW broad-area lasers SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article ID LINEWIDTH ENHANCEMENT FACTOR; SEMICONDUCTOR-LASERS; QUANTUM-WELL; DIFFERENTIAL GAIN; DEPENDENCE AB Gain, refractive index, and the linewidth enhancement factor, or alpha-parameter, are measured in broad-area InGaAs-GaAs single-quantum-well semiconductor lasers using below-threshold amplified spontaneous emission spectra and a far-field filtering technique, The alpha parameter is shown to increase dramatically with increasing carrier density and wavelength, Modes propagating in the transparent substrate of the lasers are shown to have a significant influence on the measured value of alpha. C1 ROCKWELL POWER SYST CO,KIRTLAND AFB,NM 87185. RP Bossert, DJ (reprint author), USAF,PHILLIPS LAB,LIDA,KIRTLAND AFB,NM 87117, USA. NR 18 TC 45 Z9 45 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1041-1135 J9 IEEE PHOTONIC TECH L JI IEEE Photonics Technol. Lett. PD MAR PY 1996 VL 8 IS 3 BP 322 EP 324 DI 10.1109/68.481104 PG 3 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA TY868 UT WOS:A1996TY86800006 ER PT J AU Braham, R AF Braham, R TI The air force R&D balancing act SO IEEE SPECTRUM LA English DT Article RP Braham, R (reprint author), USAF,HEADQUATERS AF MAT COMMAND,WRIGHT PATTERSON AFB,OH 45433, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9235 J9 IEEE SPECTRUM JI IEEE Spectr. PD MAR PY 1996 VL 33 IS 3 BP 45 EP 51 DI 10.1109/MSPEC.1996.485772 PG 7 WC Engineering, Electrical & Electronic SC Engineering GA TY670 UT WOS:A1996TY67000016 ER PT J AU Anastassiu, HT Volakis, JL Ross, DC Andersh, D AF Anastassiu, HT Volakis, JL Ross, DC Andersh, D TI Electromagnetic scattering from simple jet engine models SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION LA English DT Letter AB The mode-matching (MM) technique is employed for the evaluation of the radar cross section (RCS) of structures that simulate a jet engine inlet, The geometry consists of a perfectly conducting cylindrical inlet terminated by an array of blades mounted on a cylindrical hub, Comparisons of numerical results with actual measurements are presented for the first time. C1 USAF,COLORADO SPRINGS,CO. RP Anastassiu, HT (reprint author), UNIV MICHIGAN,DEPT ELECT ENGN & COMP SCI,RADIAT LAB,ANN ARBOR,MI 48109, USA. NR 2 TC 31 Z9 31 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-926X J9 IEEE T ANTENN PROPAG JI IEEE Trans. Antennas Propag. PD MAR PY 1996 VL 44 IS 3 BP 420 EP 421 DI 10.1109/8.486313 PG 2 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA TZ871 UT WOS:A1996TZ87100021 ER PT J AU Anspach, KM Bomar, BW Engels, RC Joseph, RD AF Anspach, KM Bomar, BW Engels, RC Joseph, RD TI Minimization of fixed-point roundoff noise in extended state-space digital filters SO IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-ANALOG AND DIGITAL SIGNAL PROCESSING LA English DT Article ID MINIMUM AB A technique for determining a minimum roundoff noise extended state space (e-state) realization of fixed-point recursive digital filters is developed. Previous efforts have developed such minimum roundoff noise e-state structures for the second-order e-state equation only. This new algorithm determines a minimum roundoff e-state structure for the general order e-state equation. The technique obtains a linear transformation which, when applied to the original structure, produces a minimum noise e-state structure. A combination of a conjugate gradient algorithm and a variable metric algorithm is employed to determine the transformation coefficients. The e-state roundoff noise characteristics are illustrated by numerical examples. It is found that the minimum-noise e-state structure can have lower roundoff noise than the conventional minimum-noise structure, since fewer state variables are actually computed. In an e-state structure an Nth-order filter where N = LM can be implemented by M difference equations of order L resulting in a computational complexity of O[L(M + 1)(2)]. One advantage of e-state structures, compared to other realizations, is the use of fewer, but longer inner products which pipelined digital signal processors are designed to handle efficiently. C1 UNIV TENNESSEE,INST SPACE,TULLAHOMA,TN 37388. RP Anspach, KM (reprint author), SVERDRUP TECHNOL INC,ARNOLD AFB,TN 37389, USA. RI Engels, Rutger/A-5984-2010 NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1057-7130 J9 IEEE T CIRCUITS-II JI IEEE Trans. Circuits Syst. II-Analog Digit. Signal Process. PD MAR PY 1996 VL 43 IS 3 BP 193 EP 206 DI 10.1109/82.486466 PG 14 WC Engineering, Electrical & Electronic SC Engineering GA UB631 UT WOS:A1996UB63100002 ER PT J AU Berg, JM Hammett, KD Schwartz, CA Banda, SS AF Berg, JM Hammett, KD Schwartz, CA Banda, SS TI An analysis of the destabilizing effect of daisy chained rate-limited actuators SO IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY LA English DT Article AB The response of a rate-limited actuator will lag behind a rapidly changing command, This lag may destabilize the closed-loop system, When multiple actuators are arranged in a daisy chain this effect can be significantly worse, The cost of daisy chaining, in terms of lost stability margin, is estimated analytically and numerically, A comparison of a simple daisy chain with a simple ''cooperative'' control selector shows that the daisy chain may cause as much as 30 degrees of additional phase lag. RP Berg, JM (reprint author), USAF,WRIGHT LAB,FIGC,WRIGHT PATTERSON AFB,OH 45433, USA. NR 12 TC 31 Z9 32 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1063-6536 J9 IEEE T CONTR SYST T JI IEEE Trans. Control Syst. Technol. PD MAR PY 1996 VL 4 IS 2 BP 171 EP 176 DI 10.1109/87.486343 PG 6 WC Automation & Control Systems; Engineering, Electrical & Electronic SC Automation & Control Systems; Engineering GA TZ347 UT WOS:A1996TZ34700006 ER PT J AU Xia, XG Suter, BW AF Xia, XG Suter, BW TI Multirate filter banks with block sampling SO IEEE TRANSACTIONS ON SIGNAL PROCESSING LA English DT Article ID LINEAR-PHASE ANALYSIS; FIR QMF BANKS; PERFECT-RECONSTRUCTION; LAPPED TRANSFORMS; DIGITAL-FILTERS; DESIGN; MATRICES; ALGORITHMS AB Multirate filter banks with block sampling were recently studied by Khansari and Leon-Garcia. In this paper, we want to systematically study multirate filter banks with block sampling by studying general vector filter banks where the input signals and transfer functions in conventional multirate filter banks are replaced by vector signals and transfer matrices, respectively, We show that multirate filter banks with block sampling studied by Khansari and Leon-Garcia are special vector filter banks where the transfer matrices are pseudocirculant, We present some fundamental properties for the basic building blocks, such as Noble identities, interchangeability of down/up sampling, polyphase representations of M-channel vector filter banks, and multirate filter banks with block sampling, We then present necessary and sufficient conditions for the alias-free property, finite impulse response (FIR) systems with FIR inverses, paraunitariness, and lattice structures for paraunitary vector filter banks. We also present a necessary and sufficient condition for paraunitary multirate filter banks with block sampling, As an application of this theory, we present all possible perfect reconstruction delay chain systems with block sampling, We also show some examples that are not paraunitary for conventional multirate filter banks but are paraunitary for multirate filter banks with proper block sampling, In this paper, we also present a connection between vector filter banks and vector transforms studied by Li, Vector filter banks also play important roles in multiwavelet transforms and vector subband coding. C1 USAF, INST TECHNOL, DEPT ELECT & COMP ENGN, WRIGHT PATTERSON AFB, OH 45433 USA. RP Xia, XG (reprint author), HUGHES RES LABS, MS RL69, MALIBU, CA 90265 USA. NR 57 TC 18 Z9 23 U1 1 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1053-587X J9 IEEE T SIGNAL PROCES JI IEEE Trans. Signal Process. PD MAR PY 1996 VL 44 IS 3 BP 484 EP 496 DI 10.1109/78.489022 PG 13 WC Engineering, Electrical & Electronic SC Engineering GA UF713 UT WOS:A1996UF71300003 ER PT J AU Xia, XG Suter, BW AF Xia, XG Suter, BW TI Vector-valued wavelets and vector filter banks SO IEEE TRANSACTIONS ON SIGNAL PROCESSING LA English DT Article ID ORTHONORMAL BASES; MULTIRESOLUTION; DISCRETE; ALGORITHMS; TRANSFORMS; SUBSPACES AB In this paper, we introduce vector-valued multiresolution analysis and vector-valued wavelets for vector-valued signal spaces, We construct vector-valued wavelets by using paraunitary vector filter bank theory. In particular, we construct vector-valued Meyer wavelets that are band-limited, We classify and construct vector-valued wavelets with sampling property. As an application of vector-valued wavelets, multiwavelets can be constructed from vector-valued wavelets, We show that certain linear combinations of known scalar-valued wavelets may yield multiwavelets, We then present discrete vector wavelet transforms for discrete-time vector-valued (or blocked) signals, which can be thought of as a family of unitary vector transforms. C1 USAF, INST TECHNOL, DEPT ELECT & COMP ENGN, WRIGHT PATTERSON AFB, OH 45433 USA. NR 44 TC 136 Z9 164 U1 1 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1053-587X J9 IEEE T SIGNAL PROCES JI IEEE Trans. Signal Process. PD MAR PY 1996 VL 44 IS 3 BP 508 EP 518 DI 10.1109/78.489024 PG 11 WC Engineering, Electrical & Electronic SC Engineering GA UF713 UT WOS:A1996UF71300005 ER PT J AU Xin, XG Suter, BW AF Xin, XG Suter, BW TI FIR paraunitary filter banks given several analysis filters: Factorizations and constructions SO IEEE TRANSACTIONS ON SIGNAL PROCESSING LA English DT Letter ID PERFECT-RECONSTRUCTION; DESIGN; MATRICES AB FIR paraunitary filter banks have been extensively studied and well understood recently. In this correspondence, we address the following problem: how to characterize and construct an FIR paranunitary filter bank when its several analysis filters are given a priori. To study this problem is not only useful in orthogonal M-band wavelets with certain regularity where we need to construct wavelet filters when a scaling filter with certain regularity is found a priori but is also useful in the design of multirate filter banks where we have already had several desired analysis filters. One such recent example is multiwavelet transforms. This work presents a method to construct all possible FIR paraunitary filter banks in terms of a McMillan degree when several analysis filters are given. C1 USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433. NR 14 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1053-587X J9 IEEE T SIGNAL PROCES JI IEEE Trans. Signal Process. PD MAR PY 1996 VL 44 IS 3 BP 720 EP 723 DI 10.1109/78.489048 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA UF713 UT WOS:A1996UF71300029 ER PT J AU Xia, XG Suter, BW Oxley, ME AF Xia, XG Suter, BW Oxley, ME TI Malvar wavelets with asymmetrically overlapped windows SO IEEE TRANSACTIONS ON SIGNAL PROCESSING LA English DT Letter AB Malvar wavelets (or lapped orthogonal transforms) with symmetric overlaps have been recently studied extensively. In this correspondence, we consider Malvar wavelets with asymmetric overlaps in both continuous-time and discrete-time cases. We present conditions on window functions in continuous-time case so that Malvar wavelets can be constructed from different local bases. However, in discrete-time cases, we show that Malvar wavelets are impossible unless the overlaps are symmetric. Numerical examples are presented to illustrate the theory. C1 USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433. USAF,INST TECHNOL,DEPT MATH & STAT,WRIGHT PATTERSON AFB,OH 45433. NR 16 TC 5 Z9 5 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1053-587X J9 IEEE T SIGNAL PROCES JI IEEE Trans. Signal Process. PD MAR PY 1996 VL 44 IS 3 BP 723 EP 728 DI 10.1109/78.489049 PG 6 WC Engineering, Electrical & Electronic SC Engineering GA UF713 UT WOS:A1996UF71300030 ER PT J AU Kheyfets, A Miller, WA AF Kheyfets, A Miller, WA TI Initial-data formulation of tetrad gravity utilizing York's extrinsic time approach SO INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS LA English DT Article ID ASHTEKAR AB An ability to analyze the geometrodynamic degrees of freedom and initial-data formulation is central to the canonical quantization of gravity. In the metric theory of gravity York provided the most powerful technique to analyze the dynamic degrees of freedom and to solve the initial-data problem. In this paper we extend York's analysis to tetrad gravity. Such an extension is necessary for the quantization of gravity when coupled to a half-integer-spin field. We present a comparative analysis of the geometric information carried by (1) a 3-metric of an initial hypersurface and (2) the spacelike triad of a time-gauged tetrad. We apply the tetrad initial-data formulation to Ashtekar's connection variables, and provide a comparison with other alternative choices of canonical tetrad variables. C1 LOS ALAMOS NATL LAB,DIV THEORET,THEORET ASTROPHYS GRP T6MSB288,LOS ALAMOS,NM 87545. USAF,PHILLIPS LAB,AFMC,ASTRODYNAM BRANCH,VTA,KIRTLAND AFB,NM 87117. RP Kheyfets, A (reprint author), N CAROLINA STATE UNIV,DEPT MATH,BOX 8205,RALEIGH,NC 27695, USA. NR 15 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0020-7748 J9 INT J THEOR PHYS JI Int. J. Theor. Phys. PD MAR PY 1996 VL 35 IS 3 BP 697 EP 710 DI 10.1007/BF02082832 PG 14 WC Physics, Multidisciplinary SC Physics GA UC522 UT WOS:A1996UC52200015 ER PT J AU Jenkins, JE Myatt, JH Hanff, ES AF Jenkins, JE Myatt, JH Hanff, ES TI Body-axis rolling motion critical states of a 65-degree delta wing SO JOURNAL OF AIRCRAFT LA English DT Article ID REYNOLDS-NUMBERS; CYLINDER AB Dynamic wind tunnel test results of a 65-deg swept delta wing are reviewed. These tests involved body-axis rolling motions at moderate (15- to 35-deg) angles of attack in both the Institute for Aerospace Research 2 X 3 m low-speed wind tunnel and the 7 x 10 ft Subsonic Aerodynamic Research Laboratory facility at Wright-Patterson Air Force Base. They included static, forced oscillation, and free-to-roll experiments with flow visualization, Multiple trim points (attractors) for body-axis rolling motions and other unusual dynamic behavior were observed. These data are examined in light of the nonlinear indicial response theory. The analysis confirms the existence of critical states with respect to roll angle. When these singularities are encountered in a dynamic situation, large and persistent transients are induced. Conventional means of representing the nonlinear forces and moments in the aircraft equations of motion, notably the locally linear model, are shown to be inadequate for these cases. Finally, the impact of these findings on dynamic testing techniques is discussed. RP Jenkins, JE (reprint author), USAF,WRIGHT LAB,WL FIGC 2210 8TH ST,SUITE 21,WRIGHT PATTERSON AFB,OH 45433, USA. NR 25 TC 11 Z9 11 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD MAR-APR PY 1996 VL 33 IS 2 BP 268 EP 278 DI 10.2514/3.46933 PG 11 WC Engineering, Aerospace SC Engineering GA UD291 UT WOS:A1996UD29100004 ER PT J AU Schreck, SJ Faller, WE Luttges, MW AF Schreck, SJ Faller, WE Luttges, MW TI Dynamic reattachment on a downward pitching finite wing SO JOURNAL OF AIRCRAFT LA English DT Article AB A finite wing was pitched downward at a constant rate from a fully stalled condition to zero angle of attack. Dynamic reattachment on the downward pitching wing was characterized in detail using unsteady surface pressure measurements. Results showed that dynamic reattachment initiation and progression velocity varied in response to alterations in nondimensional pitch rate and span location. In addition, these alterations to reattachment initiation and progression were prominently reflected in normal force data. An empirical model for dynamically separating flowfields was successfully adapted to account for these observed trends. Comparisons between dynamically reattaching and dynamically separating flows were also informative. Characterization and comprehension of three-dimensional dynamic reattachment are crucial prerequisites for control of unsteady separated flowfields generated by rapidly maneuvering aircraft, helicopter rotor blades, and wind energy machines. RP Schreck, SJ (reprint author), USAF,OFF SCI RES,BOLLING AFB,110 DUNCAN AVE,SUITE B213,WASHINGTON,DC 20332, USA. NR 20 TC 3 Z9 4 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD MAR-APR PY 1996 VL 33 IS 2 BP 279 EP 285 DI 10.2514/3.46934 PG 7 WC Engineering, Aerospace SC Engineering GA UD291 UT WOS:A1996UD29100005 ER PT J AU Jobe, CE Hsia, AH Jenkins, JE Addington, GA AF Jobe, CE Hsia, AH Jenkins, JE Addington, GA TI Critical states and flow structure on a 65-deg delta wing SO JOURNAL OF AIRCRAFT LA English DT Article AB Swept and delta wings maneuvering at moderate and high angles of attack produce highly nonlinear and often discontinuous aerodynamic forces and moments that are difficult to model. The nonlinear indicial response (NIR) methodology and the concept of critical states accompanied by changes in the flow structure and topology could provide a rational framework for the analyses and modeling of these lows. The analysis of surface oh-how photographs and laser light sheet high-speed video images of smoke flow has been performed. The correlation of the structural and topological changes in the flow with force and moment data follows. Critical states are often accompanied by changes in the how topology and not all topological changes produce measurable changes in the forces and moments, however, a useful relationship may exist. RP Jobe, CE (reprint author), USAF,WRIGHT LAB,BLDG 146,ROOM 305,2210 8TH ST,SUITE 11,WRIGHT PATTERSON AFB,OH 45433, USA. NR 17 TC 7 Z9 7 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD MAR-APR PY 1996 VL 33 IS 2 BP 347 EP 352 DI 10.2514/3.46944 PG 6 WC Engineering, Aerospace SC Engineering GA UD291 UT WOS:A1996UD29100015 ER PT J AU Pfeiffer, KD Quinn, DW Dungey, CE AF Pfeiffer, KD Quinn, DW Dungey, CE TI Numerical model to predict the fate of jettisoned aviation fuel SO JOURNAL OF AIRCRAFT LA English DT Article ID SPRAY DISPERSION MODEL; AIRCRAFT AB While airborne, military and civilian aircraft must occasionally jettison unburned aviation fuel into the atmosphere. This research investigates the fate of jettisoned fuel (e.g., JP-4, JP-8, etc.) from initial release to final ground fall by numerically modeling the physical phenomena governing the fate of this fuel: evaporation, advection, and dispersion. Using previous work in evaporation and free fall of fuel droplets as a foundation, this article presents an integrated evaporation, advection, and dispersion model designed to run under the resources of a typical personal computer. This integrated model is capable of using near real-time meteorological data (i.e.,vertical profiles of temperature, pressure, and wind) in all model calculations. Physical assumptions in the numerical model are presented, along with sample model calculations supporting these assumptions. Model calculations performed for two jettison scenarios show good agreement with previously published results and pith an infinite line source calculation. C1 USAF,INST TECHNOL,GRAD SCH ENGN,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433. NR 33 TC 0 Z9 0 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD MAR-APR PY 1996 VL 33 IS 2 BP 353 EP 362 DI 10.2514/3.46945 PG 10 WC Engineering, Aerospace SC Engineering GA UD291 UT WOS:A1996UD29100016 ER PT J AU Underwood, JS AF Underwood, JS TI America's pursuit of precision bombing, 1910-1945 - McFarland,SL SO JOURNAL OF AMERICAN HISTORY LA English DT Book Review RP Underwood, JS (reprint author), HEADQUARTERS AIR COMBAT COMMAND,LANGLEY AFB,VA, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ORGAN AMER HISTORIANS PI BLOOMINGTON PA 112 N BRYAN ST, BLOOMINGTON, IN 47401 SN 0021-8723 J9 J AM HIST JI J. Am. Hist. PD MAR PY 1996 VL 82 IS 4 BP 1609 EP 1610 DI 10.2307/2945393 PG 2 WC History SC History GA UC106 UT WOS:A1996UC10600097 ER PT J AU Tandon, GP Pagano, NJ AF Tandon, GP Pagano, NJ TI Effective thermoelastic moduli of a unidirectional fiber composite containing interfacial arc microcracks SO JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME LA English DT Article ID BRITTLE-MATRIX COMPOSITES; REINFORCED COMPOSITES; MECHANICAL-BEHAVIOR; INCLUSION; DAMAGE; MODEL AB In this work, we have employed a variational model to examine the effect of fiber-matrix debonding on the thermoelastic response of a unidirectional composite. The model is designed to represent the concentric cylinder model of a composite representative volume element and it contains the capability to enhance the accuracy of a given numerical solution. The effect of the extent of debonding as well as fiber volume fraction on all the effective moduli of the unidirectional composite has been examined. Numerical results reported in the literature are compared with the results of the model developed in the present study to examine the quality of the model. C1 WRIGHT LAB,MLBM,WRIGHT PATTERSON AFB,DAYTON,OH 45433. RP Tandon, GP (reprint author), ADTECH SYST RES INC,1342 N FAIRFIELD RD,DAYTON,OH 45432, USA. NR 32 TC 9 Z9 9 U1 1 U2 1 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0021-8936 J9 J APPL MECH-T ASME JI J. Appl. Mech.-Trans. ASME PD MAR PY 1996 VL 63 IS 1 BP 210 EP 217 DI 10.1115/1.2787200 PG 8 WC Mechanics SC Mechanics GA UC815 UT WOS:A1996UC81500030 ER PT J AU Blackwell, KG McGuirk, JP AF Blackwell, KG McGuirk, JP TI Tropical upper-tropospheric dry regions from TOVS and rawinsondes SO JOURNAL OF APPLIED METEOROLOGY LA English DT Article ID OPERATIONAL VERTICAL SOUNDER; PACIFIC-OCEAN; TIROS-N; VAS; RETRIEVAL; SIMULATION; RADIOMETER; PARAMETERS; CLIMATE; PLUME AB Water vapor (WV) radiances from the TIROS-N Operational Vertical Sounder (TOVS) and rawinsondes during January 1979 are intercompared within the equatorial dry zone (EDZ) southwest of Mexico and the subtropical high (STH) southwest of Hawaii. Discrepancies are found when inferring upper-tropospheric moisture over the EDZ from different instrument platforms. This paper reconciles these discrepancies between radiances and operationally measured moisture profiles, quantifies the impact of trace amounts of upper-tropospheri WV on satellite-measured radiances, and summarizes limitations in the use of WV channel data for integra ed precipitable water (PW) estimates. Contradictory upper-tropospheric moisture information is obtained over the EDZ when operational rawinsonde data and outgoing longwave radiation (OLR) are compared to TOVS WV radiances. However, no such contradiction is observed over the STH when all three data sources indicate dry conditions in the upper troposphere. This dryness is depicted in histograms of 6.7- and 7.3-mu m WV brightness temperatures T-b where a subset of excessively warm (dry) values exists within the STH but not the EDZ. It is shown that variations in small quantities of subtropopause moisture account for much of the WV T-b, discrepancy between these two regions; this moisture is not reported in operational rawinsonde data or detected in OLR. An upper-layer moisture boundary is defined linking TOVS and rawinsonde observations. This moisture boundary is the pressure level reached when moisture is integrated downward from 300 mb to a PW content of 0.6 mm. Operational rawinsonde limitations require that 300 mb be used for the top of our model atmosphere. Correlations imply that 70% of the upper-boundary elevation pressure (elevation) derived from rawinsonde data can be explained by WV T-b variations. However, large standard deviations up to 55 mb are still present in boundary pressure estimated from WV radiances. Calculations from a radiative transfer model suggest that trace moisture between 100 and 300 mb, not normally available in operational soundings, causes the discrepancy. Analysis of special ship-launched rawinsondes confirm this hypothesis and demonstrate that up to 50% of the TOVS WV weighting functions can be attributed to tropospheric moisture above 300 mb; associated PW amounts may be as little as 0.2 mm. Accounting for this moisture could reduce errors in moisture boundary locations, estimated from TOVS, to less than 10 mb. C1 TEXAS A&M UNIV,COLLEGE STN,TX. RP Blackwell, KG (reprint author), USAF ACAD,DEPT ECON & GEOG,COLORADO SPRINGS,CO 80840, USA. NR 46 TC 8 Z9 9 U1 1 U2 1 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0894-8763 J9 J APPL METEOROL JI J. Appl. Meteorol. PD MAR PY 1996 VL 35 IS 3 BP 464 EP 481 DI 10.1175/1520-0450(1996)035<0464:TUTDRF>2.0.CO;2 PG 18 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA UB905 UT WOS:A1996UB90500012 ER PT J AU Jenny, JR Skowronski, M Mitchel, WC Hobgood, HM Glass, RC Augustine, G Hopkins, RH AF Jenny, JR Skowronski, M Mitchel, WC Hobgood, HM Glass, RC Augustine, G Hopkins, RH TI Optical and electrical characterization of boron impurities in silicon carbide grown by physical vapor transport SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID DEEP AB Undoped SiC crystals grown by physical vapor transport have been characterized by temperature dependent Hall effect and near infrared optical absorption measurements. Crystals with reduced nitrogen content were found to exhibit p-type conductivity with carrier concentrations in the 5 X 10(14)-1 X 10(16) cm(-3) range at room temperature. The Fermi level position determined from Hall effect measurements at elevated temperatures was 0.35 eV above valence band. The primary acceptor-type impurity was identified as substitutional boron with total concentration of uncompensated accepters in the 1 X 10(17)-5 X 10(18) range. This interpretation was confirmed by near infrared absorption spectra, which were dominated by a broad photoionization band with a threshold at 0.7 eV and a maximum at 1.75 eV. The shape of the band was fitted, and the thermal ionization energy of the defect was found to be in the 0.3-0.4 eV range. A correlation between the photoionization band intensity, and the uncompensated boron content was used to determine the value of maximum optical cross section of boron photoionization band, which was 4.17 X 10(-17) cm(2) In addition to photoionization band, boron-containing samples exhibited set of narrow absorption lines near the fundamental absorption edge. Based on correlation with boron content and line position in different SiC polytypes, these lines were identified as due to excitons bound to neutral boron accepters. (C) 1996 American Institute of Physics. C1 USAF, WRIGHT LABS, MLPO, WRIGHT PATTERSON AFB, OH 45433 USA. WESTINGHOUSE ELECT CORP, CTR SCI & TECHNOL, PITTSBURGH, PA 15235 USA. RP CARNEGIE MELLON UNIV, DEPT MAT SCI & ENGN, PITTSBURGH, PA 15213 USA. RI Skowronski, Marek/A-8934-2011 OI Skowronski, Marek/0000-0002-2087-0068 NR 28 TC 5 Z9 5 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD MAR 1 PY 1996 VL 79 IS 5 BP 2326 EP 2331 DI 10.1063/1.361158 PG 6 WC Physics, Applied SC Physics GA TY119 UT WOS:A1996TY11900023 ER PT J AU Hesse, PJ Battino, R Scharlin, P Wilhelm, E AF Hesse, PJ Battino, R Scharlin, P Wilhelm, E TI Solubility of gases in liquids .20. Solubility of He, Ne, Ar, Kr, N-2, O-2, CH4, CF4, and SF6 in n-alkanes n-ClH2l+2 (6<=l<=16) at 298.15 K SO JOURNAL OF CHEMICAL AND ENGINEERING DATA LA English DT Article ID HIGH-PRECISION DETERMINATION; 2ND VIRIAL-COEFFICIENTS; PARTIAL MOLAR VOLUMES; THERMODYNAMIC FUNCTIONS; TEMPERATURE-DEPENDENCE; NORMAL-HEXADECANE; WATER; XENON; 1-ALKANOLS; PREDICTION AB The Ostwald coefficients L(2,1) of He, Ne, Ar, Kr, N-2, O-2, CH4, CF4, and SF6 dissolved in several homologous n-alkanes, n-ClH2l+2, 6 less than or equal to l less than or equal to 16, have been measured at 298.15 K and atmospheric pressure with a modified Ben-Naim/Baer apparatus. Altogether, 99 gas/liquid systems were investigated. Both pressure control and measurement of the volume of gas dissolved in a given volume of solvent were controlled by a microprocessor. This improved, medium-precision apparatus (the imprecision is approximately +/-0.5%) combines easy handling with automated data retrieval and is totally mercury-free. Data reduction is presented in some detail, including the estimation of auxiliary quantities, such as second virial coefficients and partial molar volumes at infinite dilution. The effect of chain length I upon solubility is shown, and some correlations between L(2,1), or the derived Henry fugacities H-2,H-1, and appropriate molecular and/or bulk properties of the gases and n-alkanes are discussed. C1 WRIGHT STATE UNIV, DEPT CHEM, DAYTON, OH 45435 USA. USAF ACAD, DEPT CHEM, COLORADO SPRINGS, CO 80840 USA. UNIV TURKU, DEPT CHEM, SF-20500 TURKU, FINLAND. UNIV VIENNA, INST PHYS CHEM, A-1090 VIENNA, AUSTRIA. NR 93 TC 72 Z9 72 U1 2 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0021-9568 J9 J CHEM ENG DATA JI J. Chem. Eng. Data PD MAR-APR PY 1996 VL 41 IS 2 BP 195 EP 201 DI 10.1021/je9502455 PG 7 WC Thermodynamics; Chemistry, Multidisciplinary; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA UA034 UT WOS:A1996UA03400011 ER PT J AU Lorenzini, NA Poterack, KA AF Lorenzini, NA Poterack, KA TI Somatosensory evoked potentials are not a sensitive indicator of potential positioning injury in the prone patient SO JOURNAL OF CLINICAL MONITORING LA English DT Article DE monitoring, somatosensory evoked potentials; positioning, prone position; nerve injury, brachial plexus ID ULNAR NERVE PALSY; BRACHIAL-PLEXUS; SURGERY; ANESTHESIA; SCOLIOSIS AB Objective. This study monitored somatosensory evoked potentials (SSEP) at the median and ulnar nerves in awake volunteers placed in a simulated position for prone surgery. Neurologic symptoms were used as a surrogate endpoint for position related peripheral nerve injury; the occurrence of these symptoms was correlated with th; presence or absence of SSEP changes in median and ulnar nerves. Methods. Median and ulnar nerve SSEP data was obtained from awake volunteers in the supine and prone positions. With the head midline in the prone position, SSEPs were measured as the arms were advanced in four cephalad increments. Symptoms, defined as tingling, numbness, or aching in the hand, forearm, or upper arm, were recorded at each position. SSEP changes were considered significant when amplitude decreased 60% and/or latency increased 10% compared with baseline prone measurements. Symptoms were correlated with SSEP changes using chi-squared analysis (p < 0.05), and Fisher's exact analysis (p < 0.07). Results. Data were collected on 14 patients, mean age 31 +/- 3 years. Seven (50%) subjects reported symptoms with changes in position, while four (29%) subjects displayed SSEP changes. There was no statistically significant association between symptoms and SSEP changes. There were no false positives (no symptoms in the presence of significant SSEP changes), but there were 3 (21%) false negatives (positive symptoms without SSEP changes). Conclusions. While all SSEP changes were associated with symptoms, the development of symptoms in 3 of 7 patients without SSEP changes suggests that SSEPs may be an imperfect monitor for the detection of positioning injury. The limited sensitivity of SSEPs in this study may be due to the duration of the monitoring, sample size, or the validity of symptoms as a surrogate for nerve injury. RP Lorenzini, NA (reprint author), WILFORD HALL USAF MED CTR,DEPT ANESTHESIOL,PSSA,LACKLAND AFB,TX 78236, USA. NR 21 TC 15 Z9 15 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0748-1977 J9 J CLIN MONITOR JI J. Clin. Monit. PD MAR PY 1996 VL 12 IS 2 BP 171 EP 176 DI 10.1007/BF02078139 PG 6 WC Anesthesiology SC Anesthesiology GA VF878 UT WOS:A1996VF87800008 PM 8823639 ER PT J AU Zach, FX Haller, EE Gabbe, D Iseler, G Bryant, GG Bliss, DF AF Zach, FX Haller, EE Gabbe, D Iseler, G Bryant, GG Bliss, DF TI Electrical properties of the hydrogen defect in InP and the microscopic structure of the 2316 cm(-1) hydrogen related line SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article DE deuterium; hydrogen; InP bulk growth ID DEUTERON-IMPLANTED INP; ATMOSPHERE; PROTON; MODES; DEEP AB We have studied the microscopic structure of a hydrogen related defect by measuring its vibrational IR absorption at 2315.6 cm(-1) in bulk InP crystals doped with deuterium. In contrast to the spectrum observed in nominally undoped samples (with only hydrogen present), the 2315.6 cm(-1) line in these samples containing both hydrogen and deuterium is split into at least three components approximately 0.5 cm(-1) apart. This can be explained if the defect contains more than one hydrogen atom; the additional lines are caused by mixed vibrational modes containing various combinations of hydrogen and deuterium. We present evidence that the formation of defect-hydrogen complexes leads to creation of a shallow intrinsic donor which can be annihilated under certain annealing conditions. C1 PARKE MATH LABS,LOWELL,MA 01854. MIT,LINCOLN LAB,LEXINGTON,MA 02173. USAF,ROME LAB,BEDFORD,MA 01731. RP Zach, FX (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 17 TC 19 Z9 19 U1 0 U2 1 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD MAR PY 1996 VL 25 IS 3 BP 331 EP 335 DI 10.1007/BF02666597 PG 5 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA TY346 UT WOS:A1996TY34600003 ER PT J AU Raouf, RA Palazotto, AN AF Raouf, RA Palazotto, AN TI Nonlinear dynamics of unidirectional, fiber-reinforced tori SO JOURNAL OF ENGINEERING MECHANICS-ASCE LA English DT Article ID STRESS AB The symbolic manipulator Mathematica is used to model the nonlinear dynamic behavior of closed, elastic toroidal shells. Transverse shears are neglected and the nonlinearities are of the Von Karman type. Two fiber-reinforcing schemes are considered: reinforcement with fibers along the major direction of the torus, and reinforcement with fibers along the minor direction of the torus. These schemes result in orthotropic material characteristics. Differential geometry is used to derive the nonlinear kinematic relationships, and a combination of the Rayleigh-Ritz technique and the method of harmonic balance is used to approximate the nonlinear natural frequencies of the tori. Numerical examples show that the linear natural frequency increases as the fiber volume fraction increases for any radii ratio. On the other hand, the nonlinear analysis of some reinforcing schemes shows a competition between the geometric and material parameters of the tori. This competition has a significant effect on the qualitative behavior of the torus and demarks the borders separating shell-like behavior and ring like behavior. C1 USAF,INST TECHNOL,DEPT AERONAUT & ASTRONAUT,WRIGHT PATTERSON AFB,OH 45433. RP Raouf, RA (reprint author), USN ACAD,DEPT ENGN MECH,ANNAPOLIS,MD 21402, USA. NR 17 TC 4 Z9 4 U1 0 U2 1 PU ASCE-AMER SOC CIVIL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-9399 J9 J ENG MECH-ASCE JI J. Eng. Mech.-ASCE PD MAR PY 1996 VL 122 IS 3 BP 271 EP 276 DI 10.1061/(ASCE)0733-9399(1996)122:3(271) PG 6 WC Engineering, Mechanical SC Engineering GA TX575 UT WOS:A1996TX57500011 ER PT J AU Woltz, DJ Bell, BG Kyllonen, PC Gardner, MK AF Woltz, DJ Bell, BG Kyllonen, PC Gardner, MK TI Memory for order of operations in the acquisition and transfer of sequential cognitive skills SO JOURNAL OF EXPERIMENTAL PSYCHOLOGY-LEARNING MEMORY AND COGNITION LA English DT Article ID WORKING MEMORY; ATTENTION; DETERMINANTS AB The authors report a series of experiments in which questions about the nature of memory for the order of processing operations in sequential processing skills (i.e., skills that require proper sequencing of a set of component operations) were addressed. Evidence from 3 studies of a sequential number computation skill suggested that memory for processing sequences that are general to many instances is more instrumental than sequence memory that is instance specific. Results generalized over task versions that differed markedly in the number of processing sequences and the number of unique stimulus instances per sequence. General sequence memory appeared to develop relatively early in practice and to underlie errors in transfer that resembled einstellung effects. The findings are discussed with respect to memory mechanisms postulated in recent theories of skill acquisition. C1 ARMSTRONG LAB, BROOKS AFB, TX USA. RP Woltz, DJ (reprint author), UNIV UTAH, DEPT EDUC PSYCHOL, 327 MILTON BENNION HALL, SALT LAKE CITY, UT 84112 USA. OI Kyllonen, Patrick C./0000-0002-6517-4576 NR 31 TC 27 Z9 27 U1 1 U2 1 PU AMER PSYCHOLOGICAL ASSOC PI WASHINGTON PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA SN 0278-7393 EI 1939-1285 J9 J EXP PSYCHOL LEARN JI J. Exp. Psychol.-Learn. Mem. Cogn. PD MAR PY 1996 VL 22 IS 2 BP 438 EP 457 DI 10.1037/0278-7393.22.2.438 PG 20 WC Psychology; Psychology, Experimental SC Psychology GA UC206 UT WOS:A1996UC20600013 ER PT J AU Thorne, JD Hall, CD AF Thorne, JD Hall, CD TI Approximate initial Lagrange costates for continuous-thrust spacecraft SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS LA English DT Article AB A method is presented to obtain approximate initial costate values and flight time for the optimal control of a continuous-thrust spacecraft on a coplanar, circle-to circle transfer. The approximate initial costates are then used as starting values for the associated boundary-value problem to match the desired final states. The exact, nonlinear differential equations are integrated to solve the boundary-value problem with a shooting method. The approximate expressions for the initial costates and flight time are useful when the thrust acceleration is greater than or equal to the change in orbital radius, in canonical units. Numerical examples are provided for a geocentric and an Earth-Mars orbital transfer. RP Thorne, JD (reprint author), USAF,INST TECHNOL,DEPT AERONAUT & ASTRONAUT,WRIGHT PATTERSON AFB,OH 45433, USA. NR 14 TC 16 Z9 18 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0731-5090 J9 J GUID CONTROL DYNAM JI J. Guid. Control Dyn. PD MAR-APR PY 1996 VL 19 IS 2 BP 283 EP 288 DI 10.2514/3.21616 PG 6 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA UA391 UT WOS:A1996UA39100004 ER PT J AU Reynolds, OR Pachter, M Houpis, CH AF Reynolds, OR Pachter, M Houpis, CH TI Full envelope flight control system design using quantitative feedback theory (vol 19, pg 23, 1996) SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS LA English DT Correction, Addition AB A controlled plant's characteristics can vary widely throughout its operational envelope. This is a major problem in nominal plant-based control system design. Hence, gain scheduling is often used for full envelope design. In this paper, it is proposed to address the plant's variability using robust control design concepts, minimizing the need for gain scheduling. In particular, the frequency-domain-based quantitative feedback theory multiple input multiple output robust controls design method is employed for the synthesis of a full envelope flight control system for an F-16 aircraft derivative, Quantitative feedback theory addresses structured uncertainty that is caused by full envelope operation. Thus, quantitative feedback theory robust control is particularly suited for full envelope controller design. Compensators and prefilters for the aircraft's pitch and lateral/directional channels are designed to meet level 1 flying qualities specifications, and these designs are validated using simulations. RP Reynolds, OR (reprint author), USAF,INST TECHNOL,WRIGHT PATTERSON AFB,OH 45433, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0731-5090 J9 J GUID CONTROL DYNAM JI J. Guid. Control Dyn. PD MAR-APR PY 1996 VL 19 IS 2 BP 504 EP 504 DI 10.2514/3.56706 PG 1 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA UA391 UT WOS:A1996UA39100038 ER PT J AU Udomsangpetch, R Pipitaporn, B Krishna, S Angus, B Pukrittayakamee, S Bates, I Suputtamongkol, Y Kyle, DE White, NJ AF Udomsangpetch, R Pipitaporn, B Krishna, S Angus, B Pukrittayakamee, S Bates, I Suputtamongkol, Y Kyle, DE White, NJ TI Antimalarial drugs reduce cytoadherence and resetting of Plasmodium falciparum SO JOURNAL OF INFECTIOUS DISEASES LA English DT Article ID HUMAN CEREBRAL MALARIA; SEQUESTRATION; ERYTHROCYTES; PARASITES; INVITRO AB The in vivo and in vitro effects of antimalarials on cytoadherence and rosette formation were studied in 17 patients with severe and 46 with uncomplicated falciparum malaria. Cytoadherence was increased in severe malaria (P < .001). Artesunate and artemether were more potent than quinine in inhibiting both adherence properties. Artesunate was the most rapidly acting drug tested, producing > 50% inhibition of both cytoadherence and resetting in vivo and in vitro within 2 h of drug exposure. Exposure to quinine for greater than or equal to 4 h in vivo reduced resetting by > 50%, but not cytoadherence. Quinine did not reduce cytoadherence or resetting significantly in vitro with exposure times of less than or equal to 8 h. These results suggest that artemisinin derivatives are more effective than quinine in preventing pathologic processes in parasitized erythrocytes that contribute to microvascular obstruction in severe malaria. C1 MAHIDOL UNIV,FAC TROP MED,BANGKOK 10400,THAILAND. MAHIDOL UNIV,FAC SCI,DEPT PATHOBIOL,BANGKOK 10400,THAILAND. USAF,DEPT IMMUNOL,INST MED SCI,BANGKOK,THAILAND. JOHN RADCLIFFE HOSP,NUFFIELD DEPT CLIN MED,OXFORD OX3 9DU,ENGLAND. RI White, Nicholas/I-4629-2012; OI Krishna, Sanjeev/0000-0003-0066-0634 NR 22 TC 51 Z9 54 U1 1 U2 3 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0022-1899 J9 J INFECT DIS JI J. Infect. Dis. PD MAR PY 1996 VL 173 IS 3 BP 691 EP 698 PG 8 WC Immunology; Infectious Diseases; Microbiology SC Immunology; Infectious Diseases; Microbiology GA TW806 UT WOS:A1996TW80600023 PM 8627034 ER PT J AU Ordonez, CA Peterkin, RE AF Ordonez, CA Peterkin, RE TI Numerical determination of plasma ion reflection coefficients at a sheath surface interface SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article AB Particle and energy reflection coefficients at a plasma-facing surface are determined for hydrogen-isotope plasma ions which are incident on a carbon surface. Expressions are first fit to Monte Carlo calculations to obtain reflection coefficients which are functionally dependent on the energy and angle of incidence. These expressions are then integrated over the distribution function for plasma ions at the sheath-surface interface to obtain formulas for particle and energy reflection coefficients which functionally depend on the plasma temperature and the sheath potential. C1 USAF,PHILLIPS LAB,HIGH ENERGY PLASMA DIV,KIRTLAND AFB,NM 87117. RP Ordonez, CA (reprint author), UNIV N TEXAS,DEPT PHYS,DENTON,TX 76203, USA. NR 9 TC 3 Z9 3 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD MAR PY 1996 VL 228 IS 2 BP 201 EP 206 DI 10.1016/S0022-3115(95)00221-9 PG 6 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA UE766 UT WOS:A1996UE76600006 ER PT J AU Cardona, SM Bernreuter, M AF Cardona, SM Bernreuter, M TI Graduate nurse overhires - A cost analysis SO JOURNAL OF NURSING ADMINISTRATION LA English DT Article AB Traditionally, the process for filling vacated nursing positions has contributed to a hiatus between the departure of one nurse and the arrival of another who is prepared to assume patient care responsibility. This is due at least partially to limited work force renewal strategies. Given the cost to temporarily fill vacated positions with agency nurses or to pay nurses overtime rates, current methods of replacing departing nurses may no longer be practical in all cases. The authors discuss the strategy of overhiring graduate nurses and compare these costs to more traditional temporary methods of replacing nurses who have resigned. C1 UNIV TEXAS,HLTH SCI CTR,SAN ANTONIO,TX 78284. RP Cardona, SM (reprint author), USAF,GEN SURG UNIT,KEESLER AFB,MI 39534, USA. NR 10 TC 4 Z9 4 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0002-0443 J9 J NURS ADMIN JI J. Nurs. Adm. PD MAR PY 1996 VL 26 IS 3 BP 10 EP 15 DI 10.1097/00005110-199603000-00010 PG 6 WC Nursing SC Nursing GA TZ908 UT WOS:A1996TZ90800009 PM 8618118 ER PT J AU Senseney, MB Buter, TA Bowersox, RDW AF Senseney, MB Buter, TA Bowersox, RDW TI Performance characterization of a highly offset diffuser with vortex generator jets SO JOURNAL OF PROPULSION AND POWER LA English DT Article ID FLOW AB The effect of blowing vortex generator jets on the performance of a highly offset (S-duct) diffuser was investigated experimentally (M(1) = 0.6, Re-eq = 3.46 x 10(7)). Inlet plane total pressure and Mach number contours were mapped using a pitot probe. Exit plane total pressure recovery, static pressure recovery, and Mach number contours were mapped with blowing on and off, using pitot and static probes. Cross-wire anemometry was used to measure the mean velocity and turbulence intensity in three dimensions at three spanwise locations on the exit plane with the blowing on and off. Without blowing, the flow on the lower surface of the diffuser was massively separated. Blowing at 0.50% mass flow ratio through three lower-surface vortex generator jets reduced the size of the separated-dow region and the exit plane boundary-layer thickness, increased pressure recovery, and decreased turbulence intensity. Blowing re distributed momentum within the diffuser and altered the secondary flow structure. However, the exit plane total and static pressure fields were more distorted with blowing than without. RP Senseney, MB (reprint author), USAF,INST TECHNOL,DEPT AERONAUT & ASTRONAUT,WRIGHT PATTERSON AFB,OH 45433, USA. NR 15 TC 2 Z9 2 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD MAR-APR PY 1996 VL 12 IS 2 BP 237 EP 244 DI 10.2514/3.24019 PG 8 WC Engineering, Aerospace SC Engineering GA UB282 UT WOS:A1996UB28200004 ER PT J AU Frederick, RA Williams, BM Farmer, SB AF Frederick, RA Williams, BM Farmer, SB TI Predicting and analyzing X-rays to measure propellant crack propagation speed SO JOURNAL OF PROPULSION AND POWER LA English DT Article AB Real-time radioscopy (RTR) of solid rocket motors has revealed information about the propellant burning and cracking. This theoretical study evaluated the viability of real-time radioscopy for measuring propellant crack propagation speed. The scope included the quantitative interpretation of crack tip velocity from simulated radiographic images of a burning, center-perforated motor. The simplified motor simulation portrayed a bore crack that moved radially at a speed that was 10 times the propellant burning rate. Comparing the image interpretation with the simulation input quantified the accuracy of the crack velocity measurement under favorable, first-order assumptions. The simulation included the effects of system configuration, finite spatial resolution (from video pixels), and (8-bit) intensity digitization. The image digitization and interpretation introduced a +/-20% measurement uncertainty in the crack tip speed for the nominal condition. A +/-10% uncertainty resulted from doubling the camera gain. Using curve-fitting techniques, the result was a constant 2% bias in the crack tip velocity measurement. This best case analysis shows that RTR has the potential for making acceptable measurements under the conditions studied. C1 SVERDRUP TECHNOL INC,ENGN SUPPORT DEPT,ARNOLD AFB,TN 37389. SVERDRUP TECHNOL INC,PLUME DATA CTR,ARNOLD AFB,TN 37389. RP Frederick, RA (reprint author), UNIV ALABAMA,DEPT AEROSP & MECH ENGN,HUNTSVILLE,AL 35899, USA. NR 10 TC 0 Z9 0 U1 1 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD MAR-APR PY 1996 VL 12 IS 2 BP 310 EP 314 DI 10.2514/3.24029 PG 5 WC Engineering, Aerospace SC Engineering GA UB282 UT WOS:A1996UB28200014 ER PT J AU Maurice, LQ Leingang, JL Carreiro, LR AF Maurice, LQ Leingang, JL Carreiro, LR TI Airbreathing space boosters using in-flight oxidizer collection SO JOURNAL OF PROPULSION AND POWER LA English DT Article AB A historical review of the development of a propulsion fluid system known as AGES (air collection and enrichment system) is presented, The role of the AGES system is to acquire and store liquid oxygen (LOX) en route to orbit for rocket use beyond the airbreathing envelope. The refrigeration capacity of liquid hydrogen is employed to condense the air and fractional distillation used to extract the oxygen component from the inlet airflow, Earth-to orbit capability is achieved without carrying LOX from takeoff or relying on scramjets, The development history of the major AGES components is traced and a review of AGES system studies conducted since the 1960s is provided. The payload fractions achievable with AGES are shown to be competitive with scramjet-powered space launch vehicles without relying on airbreathing propulsion beyond the speed of conventional turboramjet engines. RP Maurice, LQ (reprint author), USAF,WRIGHT LAB,AERO PROP & POWER DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 20 TC 2 Z9 2 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD MAR-APR PY 1996 VL 12 IS 2 BP 315 EP 321 DI 10.2514/3.24030 PG 7 WC Engineering, Aerospace SC Engineering GA UB282 UT WOS:A1996UB28200015 ER PT J AU Ponnappan, R Leland, JE Chang, WS Beam, JE Nguyen, BT Weimer, JA AF Ponnappan, R Leland, JE Chang, WS Beam, JE Nguyen, BT Weimer, JA TI Active cooling of metal oxide semiconductor controlled thyristor using venturi flow SO JOURNAL OF PROPULSION AND POWER LA English DT Article AB A metal oxide semiconductor controlled thyristor (MCT) is a solid-state high-current switching device. Because of its high-current and high-heat dissipation, this device requires an advanced cooling arrangement. A sample MCT device was successfully tested in a conduction mode up to 95 A using a new technique called venturi cooling. Steady-state operational tests were performed under various coolant temperatures and flow rates. The highest device temperature was 168.5 degrees C, whereas the power dissipation and heat flux were 170 W and 257 W/cm(2), respectively. Comparison with a commercial liquid-cooled cold plate showed that the cooling effectiveness is nearly double for the venturi flow. Measured junction-to-case thermal resistance of the MCT was 0.213 degrees C/W for venturi flow compared to 0.421 degrees C/W for the commercial cold plate. Venturi flow cooling is highly recommended for MCT applications. C1 USAF,WRIGHT LAB,AEROSP POWER DIV,WRIGHT PATTERSON AFB,OH 45433. RP Ponnappan, R (reprint author), UNIVERSAL ENERGY SYST INC,MAT & PROC DIV,DAYTON,OH 45432, USA. NR 13 TC 1 Z9 1 U1 1 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD MAR-APR PY 1996 VL 12 IS 2 BP 398 EP 404 DI 10.2514/3.24042 PG 7 WC Engineering, Aerospace SC Engineering GA UB282 UT WOS:A1996UB28200027 ER PT J AU Swenson, GR Rairden, RL Jennings, DE Ahmadjian, M AF Swenson, GR Rairden, RL Jennings, DE Ahmadjian, M TI Vehicle glow measurements on space transportation system flight 62 SO JOURNAL OF SPACECRAFT AND ROCKETS LA English DT Article ID SHUTTLE GLOW; ENVIRONMENT; EMISSIONS AB Spacecraft glows are primarily a result of satellite surfaces (and their gas clouds) interacting with the rarefied atmosphere in low Earth orbit, Studies of glow were performed in March 1934 on Space Transportation System flight 62 as part of the Office of Astronautics and Space Technology payload objectives, Together the experimental investigation of spacecraft glow and the spacecraft kinetic infrared test instruments made observations encompassing the far-ultraviolet, ultraviolet, visible, and infrared spectral regions, The experiment included the release of N-2 that was expected to atom exchange with atmospheric O to form surface reactive constituents N and NO. Emission measurements indicate that ground state N-2 at orbital velocities does not atom exchange;Is previously believed, Another key finding was the lack of N-2 Lyman-Birge-Hopfield emissions in the far ultraviolet, Thruster activity, particularly in low elliptical orbit, is found to cause bright enhancements of OI 5577 and 6300 Angstrom emissions in the Shuttle environment. This investigation studied the effects of altitude, temperature, two paint materials (2306 black Chemglaze(R) and A276 white Chemglaze), ram-wake orientation, thruster gas clouds, and thruster effluent surface doping on the glow intensity and spectral character. C1 NASA,GODDARD SPACE FLIGHT CTR,ORG 6932,GREENBELT,MD 20771. USAF,PHILLIPS LAB,GEOPHYS DIRECTORATE,MC PL,XPG,BEDFORD,MA 01731. RP Swenson, GR (reprint author), LOCKHEED MISSILES & SPACE CO INC,PALO ALTO RES LAB,DEPT 9120,BLDG 252,3251 HANOVER ST,PALO ALTO,CA 94304, USA. RI Jennings, Donald/D-7978-2012 NR 27 TC 2 Z9 2 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0022-4650 J9 J SPACECRAFT ROCKETS JI J. Spacecr. Rockets PD MAR-APR PY 1996 VL 33 IS 2 BP 240 EP 249 DI 10.2514/3.26747 PG 10 WC Engineering, Aerospace SC Engineering GA UE755 UT WOS:A1996UE75500011 ER PT J AU Royster, JD Berger, EH Merry, CJ Nixon, CW Franks, JR Behar, A Casali, JG DixonErnst, C Kieper, RW Mozo, BT Ohlin, D Royster, LH AF Royster, JD Berger, EH Merry, CJ Nixon, CW Franks, JR Behar, A Casali, JG DixonErnst, C Kieper, RW Mozo, BT Ohlin, D Royster, LH TI Development of a new standard laboratory protocol for estimating the field attenuation of hearing protection devices .1. Research of Working Group 11, Accredited Standards Committee S12, noise SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB This paper describes research conducted by Working Group 11 of Accredited Standards Committee S12, Noise, to develop procedures to estimate the field performance of hearing protection devices (HPDs). Current standardized test methods overestimate the attenuation achieved by workers in everyday use on the job. The goal was to approximate the amount of attenuation that can be achieved by noise-exposed populations in well-managed real-world hearing conservation programs, while maintaining acceptable interlaboratory measurement variability. S12/WG11 designed two new laboratory-based protocols for measuring real-ear attenuation at threshold, with explicit procedures for subject selection, training, supervision, and HPD fitting. After pilot-testing, S12/WG11 conducted a full-scale study of three types of earplugs and one earmuff tested by four independent laboratories using both protocols. The protocol designated as "subject-fit" assessed the attenuation achieved by subjects who were experienced in threshold audiometry, but naive with respect to the use of hearing protection, when they fit HPDs by following manufacturers' instructions without any experimenter assistance. The attenuation results from the subject-fit method corresponded more closely to real-world data than results from the other protocol tested, which allowed the experimenter to coach subjects in HPD use, Comparisons of interlaboratory measurement variability for the subject-fit procedure to previous interlaboratory studies using other protocols indicated that the measurements with the new procedure are at least as reproducible as those obtained with existing standardized methods. Therefore, the subject-fit protocol was selected for consideration for use in future revisions of HPD attenuation test standards. (C) 1996 Acoustical Society of America. C1 CABOT SAFETY CORP, EAR, INDIANAPOLIS, IN 46268 USA. NIOSH, CINCINNATI, OH 45226 USA. USAF, ARMSTRONG LAB, WRIGHT PATTERSON AFB, OH 45433 USA. BEHAR NOISE CONTROL, SCARBOROUGH, ON M1M 2X8, CANADA. VIRGINIA POLYTECH INST & STATE UNIV, BLACKSBURG, VA 24061 USA. ALCOA, PITTSBURGH, PA 15219 USA. USA, AEROMED RES LAB, FT RUCKER, AL 36330 USA. USA, CTR HLTH PROMOT & PREVENT MED, ABERDEEN PROVING GROUND, MD 21010 USA. N CAROLINA STATE UNIV, RALEIGH, NC 27695 USA. RP ENVIRONM NOISE CONSULTANTS INC, POB 30698, RALEIGH, NC 27622 USA. RI Behar, Alberto/B-3967-2008 NR 30 TC 18 Z9 19 U1 1 U2 4 PU ACOUSTICAL SOC AMER AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0001-4966 EI 1520-8524 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD MAR PY 1996 VL 99 IS 3 BP 1506 EP 1526 DI 10.1121/1.414729 PG 21 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA UA036 UT WOS:A1996UA03600025 ER PT J AU Meffert, JJ Davis, BM AF Meffert, JJ Davis, BM TI Furniture-induced erythema ab igne SO JOURNAL OF THE AMERICAN ACADEMY OF DERMATOLOGY LA English DT Article C1 WILFORD HALL USAF MED CTR,DEPT DERMATOL,LACKLAND AFB,TX 78236. MALCOLM GROW MED CTR,DERMATOL SERV,WASHINGTON,DC. NR 12 TC 21 Z9 22 U1 0 U2 1 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0190-9622 J9 J AM ACAD DERMATOL JI J. Am. Acad. Dermatol. PD MAR PY 1996 VL 34 IS 3 BP 516 EP 517 DI 10.1016/S0190-9622(96)90463-6 PG 2 WC Dermatology SC Dermatology GA TZ292 UT WOS:A1996TZ29200023 PM 8609272 ER PT J AU Piersma, BJ Ryan, DM Schumacher, ER Riechel, TL AF Piersma, BJ Ryan, DM Schumacher, ER Riechel, TL TI Electrodeposition and stripping of lithium and sodium on inert electrodes in room temperature chloroaluminate molten salts SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID IONIC LIQUIDS; REDUCTION POTENTIALS; CHLORIDE; ELECTROCHEMISTRY; PROTONS AB The demonstration of a stable, reversible alkali metal anode is an important step in the development of practical secondary batteries using room temperature chloroaluminate molten salts as electrolytes. Such melts are made by mixing 1-ethyl-3-methylimidazolium chloride (EMICl) with aluminum chloride, and can be Lewis buffered by adding LiCl or NaCl. It has been shown previously that protons added to a sodium chloride buffered melt as 1-ethyl-3-methylimidazolium hydrogen dichloride (ENTIHCl(2)) provide a more negative voltage window and nearly reversible deposition-stripping behavior for sodium. While EMIHCl(2) is a proven proton source and also enhances lithium deposition and stripping, its stability in the melt is limited by the rapid loss of HCl(g). We report here that triethanolamine hydrogen chloride is effective in widening the voltage window, allows the plating and stripping of both lithium and sodium, and is stable in buffered EMICl/AlCl3 melts for months. A study of various potential proton donors suggests that deprotonation of one ethanolic group of triethanolamine . HCl is responsible for the effect. A few other reagents also give this effect, but react more slowly or are more difficult to handle. Plated sodium appears to be more stable in this melt system than lithium. C1 MIAMI UNIV,DEPT CHEM,OXFORD,OH 45056. BATTERY ELECTROCHEM SECT,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433. RP Piersma, BJ (reprint author), HOUGHTON COLL,DEPT CHEM,HOUGHTON,NY 14744, USA. NR 19 TC 47 Z9 51 U1 1 U2 22 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD MAR PY 1996 VL 143 IS 3 BP 908 EP 913 DI 10.1149/1.1836557 PG 6 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA UC203 UT WOS:A1996UC20300030 ER PT J AU Barohn, RJ Gronseth, GS Amato, AA McGuire, SA McVey, AL LeForce, BR King, RB AF Barohn, RJ Gronseth, GS Amato, AA McGuire, SA McVey, AL LeForce, BR King, RB TI Cerebrospinal fluid and nerve conduction abnormalities in HIV positive individuals SO JOURNAL OF THE NEUROLOGICAL SCIENCES LA English DT Article DE HIV; CD4-T lymphocyte count; cerebrospinal fluid; nerve conduction studies; peripheral neuropathy; AIDS ID ACQUIRED IMMUNODEFICIENCY SYNDROME; DIAGNOSTIC-CRITERIA; SENSORY NEUROPATHY; AIDS; POLYRADICULOPATHY; INFECTION; SPECTRUM AB We studied whether there was an association between nerve conduction studies (NCS), CSF, and CD4-T lymphocyte parameters in a large cohort of HIV positive individuals. Two hundred and twenty-eight HIV positive individuals underwent motor and sensory nerve conduction studies, CSF evaluation, peripheral CD4-T lymphocyte count, and neurologic evaluation to determine the presence or absence of peripheral neuropathy. We compared NCS of HIV positive subjects with and without abnormal CSF parameters in the entire cohort, We also compared CSF parameters in a subset of CD4-matched patients with and without neuropathy. CSF abnormalities (in excess of laboratory norms) occured frequently in the entire study group. There was no statistically significant relationship between NCS and CSF parameters, In addition, there was no significiant difference in the CSF findings in the group of patients with clinical neuropathy compared to the group without neuropathy. However, there was an association (p < 0.05) between lower CD4 counts and NCS parameters, In general, abnormal CSF findings are not associated with deteriorating peripheral nerve function in HIV infected patients and are just as likely to be found in an HIV positive patient whether or not a peripheral neuropathy is present. C1 WILFORD HALL USAF MED CTR,DEPT NEUROL,SAN ANTONIO,TX 78236. RP Barohn, RJ (reprint author), UNIV TEXAS,SW MED CTR,DEPT NEUROL,5323 HARRY HINES BLVD,DALLAS,TX 75235, USA. NR 17 TC 8 Z9 8 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-510X J9 J NEUROL SCI JI J. Neurol. Sci. PD MAR PY 1996 VL 136 IS 1-2 BP 81 EP 85 DI 10.1016/0022-510X(95)00294-C PG 5 WC Clinical Neurology; Neurosciences SC Neurosciences & Neurology GA UC708 UT WOS:A1996UC70800013 PM 8815183 ER PT J AU Capano, MA McDevitt, NT Singh, RK Qian, F AF Capano, MA McDevitt, NT Singh, RK Qian, F TI Characterization of amorphous carbon thin films SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A LA English DT Article ID X-RAY REFLECTIVITY; DIAMOND AB The objective of this study is to develop improved procedures for characterizing amorphous carbon films. Raman spectroscopy is used to characterize amorphous carbon thin films grown by pulsed laser deposition at temperatures between 293 and 873 K. The amount of bond-angle disorder is shown to decrease with increasing substrate temperature. However, a shift of the Raman D peak to higher wave numbers is not observed to coincide with the presumed decrease in sp(3) bonding as the deposition temperature increases. The graphitic domain size is shown to initially decrease, pass through a minimum, and then increase as temperature increases. Mass densities, measured independently by x-ray specular reflectometry, are seen to decrease from a maximum of 2.4 g/cm(-3) as deposition temperature increases. The trend in the observed density measurements correlates well with the Raman spectroscopy data. The importance of x-ray specular reflectometry as part of a strategy to completely characterize amorphous carbon films is discussed in terms of these data. (C) 1996 American Vacuum Society. C1 UNIV FLORIDA, DEPT MAT SCI & ENGN, GAINESVILLE, FL 32611 USA. RP Capano, MA (reprint author), WRIGHT LAB, MAT DIRECTORATE, WRIGHT PATTERSON AFB, OH 45433 USA. NR 15 TC 70 Z9 74 U1 1 U2 7 PU A V S AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A PD MAR-APR PY 1996 VL 14 IS 2 BP 431 EP 435 DI 10.1116/1.580101 PG 5 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA UA575 UT WOS:A1996UA57500027 ER PT J AU Beheshti, MV Jones, MP AF Beheshti, MV Jones, MP TI Shunt occlusion and acute portal, splenic, and Mesenteric venous thrombosis complicating placement of a transjugular intrahepatic portosystemic shunt SO JOURNAL OF VASCULAR AND INTERVENTIONAL RADIOLOGY LA English DT Article DE interventional procedures, complications; stents and prostheses; thrombolysis; thrombosis, venous C1 USAF,WRIGHT PATTERSON MED CTR,DIV MED,GASTROENTEROL SECT,WRIGHT PATTERSON AFB,OH 45433. RP Beheshti, MV (reprint author), USAF,WRIGHT PATTERSON MED CTR,DEPT DIAGNOST RADIOL,SECT VASC & INTERVENT RADIOL,WRIGHT PATTERSON AFB,OH 45433, USA. NR 22 TC 6 Z9 7 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 1051-0443 J9 J VASC INTERV RADIOL JI J. Vasc. Interv. Radiol. PD MAR-APR PY 1996 VL 7 IS 2 BP 277 EP 281 DI 10.1016/S1051-0443(96)70780-7 PG 5 WC Radiology, Nuclear Medicine & Medical Imaging; Peripheral Vascular Disease SC Radiology, Nuclear Medicine & Medical Imaging; Cardiovascular System & Cardiology GA UQ438 UT WOS:A1996UQ43800019 PM 9007811 ER PT J AU Louder, DS Mikkelsen, SL Null, DM AF Louder, DS Mikkelsen, SL Null, DM TI Detecting hypoglycemia in venous blood - Comparison of two neonatal bedside glucose monitors SO LABORATORY MEDICINE LA English DT Article ID NEWBORN-INFANTS; VALUES AB We evaluated the performance of the One Touch II Hospital in neonatal mode (Lifescan, Militipas Calif) and Accu-Chek II (Boehringer Mannheim, Indianapolis) in screening for neonatal hypoglycemia. We used blood with low-to-normal glucose concentrations and a wide range of hematocrits to mimic infant blood. Single-donor adult blood was collected in heparinized tubes and allowed to metabolize overnight. Red blood cells were separated and reconstituted With the plasma, normal saline, and 10% dextrose to 5 hematocrits and 6 approximate plasma glucose concentrations. All 30 combinations of hematocrit and glucose concentration were tested. The One Touch II Hospital glucose monitor showed the best accuracy of numeric results (32%-78% vs 11%-54%), precision (pooled standard deviation, 2.4 mg/dL vs 4.6-13.9 mg/dL), and correlation (Pearson's r, 0.95-0.98 vs 0.82-0.86). Sensitivity and specificity for hypoglycemic glucose levels were statistically similar. RP Louder, DS (reprint author), WILFORD HALL USAF MED CTR,PSP,DEPT PEDIAT,2200 BERGQUIST DR,STE 1,LACKLAND AFB,TX 78236, USA. NR 17 TC 1 Z9 1 U1 0 U2 0 PU AMER SOC CLIN PATHOLOGISTS PI CHICAGO PA 2100 W HARRISON ST, CHICAGO, IL 60612 SN 0007-5027 J9 LAB MED JI Lab. Med. PD MAR PY 1996 VL 27 IS 3 BP 184 EP 187 PG 4 WC Medical Laboratory Technology SC Medical Laboratory Technology GA TW870 UT WOS:A1996TW87000019 ER PT J AU Carlson, JL AF Carlson, JL TI California fault: Searching for the spirit of state along the San Andreas - Clarke,T SO LIBRARY JOURNAL LA English DT Book Review RP Carlson, JL (reprint author), VANDENBERG AFB LIB,VANDENBERG AFB,CA 93437, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD MAR 1 PY 1996 VL 121 IS 4 BP 95 EP 95 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA TW867 UT WOS:A1996TW86700120 ER PT J AU Shi, HQ Chen, SH deRosa, ME Bunning, TJ Adams, WW AF Shi, HQ Chen, SH deRosa, ME Bunning, TJ Adams, WW TI Dynamic mechanical properties of cyclohexane-based glass-forming liquid crystals and a linear side chain polymer analogue SO LIQUID CRYSTALS LA English DT Article ID OPTICAL-DATA-STORAGE; SILOXANES; PHOSPHAZENES; SYSTEMS AB A nematic and a cholesteric liquid crystal, both derived from trans-1,3,5-cyclohexanetricarboxylic acid, and a linear side chain polymer analogue were characterized in terms of storage (G') and loss (G '') moduli as functions of frequency and temperature. It was found that all three model compounds show a shear shinning flow behaviour with zero shear viscosities of the low molar mass systems significantly less than that of the polymer system at the same reduced temperature, T/T-g. With shift factors prescribed by the WLF equation, both the G' and G '' data of all three compounds are adequately represented by master curves. Furthermore, within the framework of the stretched exponential model, the relaxation behaviours of the low molar mass systems are well described by a single Maxwell element, whereas the polymer system shows a relatively broad distribution of relaxation times. The observed viscoelastic properties suggest a relative ease of material processing of the low molar mass systems compared to the polymer analogue due to a lower zero shear viscosity and a single relaxation time characterizing the dynamics of response to a mechanical or thermal stimulus. C1 UNIV ROCHESTER,DEPT CHEM ENGN,ROCHESTER,NY 14627. UNIV ROCHESTER,LASER ENERGET LAB,NEW YORK,NY 14623. WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433. RI Adams, Wade/A-7305-2010 NR 31 TC 10 Z9 10 U1 0 U2 2 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0267-8292 J9 LIQ CRYST JI Liq. Cryst. PD MAR PY 1996 VL 20 IS 3 BP 277 EP 282 DI 10.1080/02678299608032035 PG 6 WC Chemistry, Multidisciplinary; Crystallography; Materials Science, Multidisciplinary SC Chemistry; Crystallography; Materials Science GA TZ270 UT WOS:A1996TZ27000002 ER PT J AU Pachter, R Haaland, PD Wang, ZQ Crane, RL Adams, WW AF Pachter, R Haaland, PD Wang, ZQ Crane, RL Adams, WW TI Natural springs: Prediction of the structure and mechanical response of biomolecular chains SO MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC MATERIALS SENSORS AND SYSTEMS LA English DT Article DE biomolecular chains; structural determination; mechanical response ID MONTE-CARLO METHOD; CONFORMATIONAL-ANALYSIS; ENERGY STRUCTURES; POLYPEPTIDES; MINIMIZATION AB In this paper we report first the application of the adaptive simulated annealing (ASA) global optimization method for structure determination of biomolecules, using the Empirical Conformation Energy Program for Peptides (ECEPP/2) potential. A dominant right-handed alpha-helical conformation is found for an (L-Ala) model, and the approach is noted to be an efficient and robust algorithm for conformational analysis. The prediction of biomolecular structure then enables the evaluation of the mechanical response of any biomolecular chain. In particular, in this study we compare on a theoretical basis the 'spring-like' microscopic mechanical response of alpha-helical biopolymers having a reinforcing intra-molecular hydrogen-bonding network to analogous synthetic extended-chain polymers. The theoretical verification of the absence of compressive buckling in biopolymer chains with alpha-helical structures rationalizes the molecular elasticity and resistance to 'kinking' of alpha-helical strands, and hence the apparent prevalence in nature of such coiled coils. This new understanding of the structure-to-function relationships in biopolymers may also explain, in part, the pivotal role of the alpha-helix in biological systems as a requirement for superior compressive mechanical properties. Indeed, by developing a combination of approaches for the prediction of structure and the mechanical response of biomolecular chains, we gain new guidance for the synthesis of motifs consistent with molecular frameworks optimized by nature. C1 USAF,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. RI Adams, Wade/A-7305-2010 NR 46 TC 2 Z9 2 U1 0 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0928-4931 J9 MAT SCI ENG C-BIOMIM JI Mater. Sci. Eng. C-Biomimetic Mater. Sens. Syst. PD MAR PY 1996 VL 4 IS 1 BP 63 EP 68 DI 10.1016/0928-4931(95)00125-5 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA UG549 UT WOS:A1996UG54900010 ER PT J AU Johnson, KE Bauer, KW Moore, JT Grant, M AF Johnson, KE Bauer, KW Moore, JT Grant, M TI Metamodelling techniques in dimensional optimality analysis for linear programming SO MATHEMATICAL AND COMPUTER MODELLING LA English DT Article DE optimality analysis; postoptimality analysis; critical regions; experimental design; response surface methodology; regression; kriging AB Response surface methodology (RSM) and kriging are used to develop a methodology for optimality analysis of linear programs (LPs). Using these techniques, metamodels are developed to predict the optimal objective function value of an LP for various levels of the constraints. These metamodels are valid over multiple critical regions, eliminating the usual requirement of determining which critical region contains the right-hand-side vector of interest. The metamodels are used to determine the responsiveness of the optimal objective function value to changes in the right-hand-side vector while illuminating key relationships between the objective function value and the elements of the right-hand-side vector. In some cases, the metamodels can actually be used as a surrogate model for the entire LP model. The metamodels are tested by comparing the predictions to the optimal solutions obtained by solving the linear programming model. This paper provides a description of the methodology as well as the results from three test problems. RP Johnson, KE (reprint author), USAF,INST TECHNOL ENS,DEPT OPERAT SCI,2950 P ST,WRIGHT PATTERSON AFB,OH 45433, USA. NR 21 TC 2 Z9 3 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0895-7177 J9 MATH COMPUT MODEL JI Math. Comput. Model. PD MAR PY 1996 VL 23 IS 5 BP 45 EP 60 DI 10.1016/0895-7177(96)00011-8 PG 16 WC Computer Science, Interdisciplinary Applications; Computer Science, Software Engineering; Mathematics, Applied SC Computer Science; Mathematics GA UA197 UT WOS:A1996UA19700004 ER PT J AU Smith, RM Trott, KD Sundstrom, BM Ewen, D AF Smith, RM Trott, KD Sundstrom, BM Ewen, D TI The passive MM-wave scenario SO MICROWAVE JOURNAL LA English DT Article C1 USAF, US Dept Def, Wright Lab, Armament Directorate,Adv Guidance Div, Washington, DC 20330 USA. Millitech Corp, Special Projects, S Deerfield, MA USA. RP Smith, RM (reprint author), USAF, US Dept Def, Wright Lab, Armament Directorate,Adv Guidance Div, Washington, DC 20330 USA. NR 6 TC 3 Z9 3 U1 0 U2 0 PU HORIZON HOUSE PUBLICATIONS INC PI NORWOOD PA 685 CANTON ST, NORWOOD, MA 02062 USA SN 0192-6225 J9 MICROWAVE J JI Microw. J. PD MAR PY 1996 VL 39 IS 3 BP 22 EP + PG 9 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA V2895 UT WOS:000168853400001 ER PT J AU Linden, DS Altshuler, EE AF Linden, DS Altshuler, EE TI Automating wire antenna design using genetic algorithms SO MICROWAVE JOURNAL LA English DT Article AB This paper describes antennas designed with a deductive approach that allows the desired electromagnetic proper-ties to be specified. The wire configuration that most closely produces these results is synthesized. The resulting so-called genetic antennas were built and tested. Agreement with the computational results was good. The antennas that have been designed with this process have a weird shape with wires going in haphazard directions. These designs could never be obtained using the inductive approach that has been used in the past. This new process may revolutionize the design of wire antennas. C1 USAF, Rome Lab, Bedford, MA 01731 USA. RP Linden, DS (reprint author), USAF, Rome Lab, Bedford, MA 01731 USA. NR 11 TC 27 Z9 28 U1 0 U2 1 PU HORIZON HOUSE PUBLICATIONS INC PI NORWOOD PA 685 CANTON ST, NORWOOD, MA 02062 USA SN 0192-6225 J9 MICROWAVE J JI Microw. J. PD MAR PY 1996 VL 39 IS 3 BP 74 EP + PG 7 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA V2895 UT WOS:000168853400018 ER PT J AU Abadi, J AF Abadi, J TI Arms control and security in the Middle East: The search for common ground - Eisendorf,R SO MIDDLE EAST POLICY LA English DT Book Review RP Abadi, J (reprint author), USAF ACAD,COLORADO SPRINGS,CO 80840, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU MIDDLE EAST POLICY COUNCIL PI WASHINGTON PA 1730 M ST, NW, STE 512, WASHINGTON, DC 20036 SN 1061-1924 J9 MIDDLE EAST POLICY JI Middle East Policy PD MAR PY 1996 VL 4 IS 3 BP 195 EP 197 PG 3 WC Area Studies; International Relations SC Area Studies; International Relations GA UC880 UT WOS:A1996UC88000024 ER PT J AU Thomason, RW Craig, FE Banks, PM Sears, DL Myerson, GE Gulley, ML AF Thomason, RW Craig, FE Banks, PM Sears, DL Myerson, GE Gulley, ML TI Epstein-Barr virus and lymphoproliferation in methotrexate-treated rheumatoid arthritis SO MODERN PATHOLOGY LA English DT Article DE Epstein-Barr virus; lymphoma; methotrexate; post-transplantation lymphoproliferative disorder; rheumatoid arthritis ID IMMUNOCOMPROMISED HOSTS; TRANSPLANT RECIPIENTS; INSITU HYBRIDIZATION; LYMPHOMAS; DISEASES; DISORDERS; INFECTION; THERAPY; LATENT; IMMUNODEFICIENCY AB Generalized lymphadenopathy developed in a 60-year-old female receiving methotrexate and prednisone for treatment of rheumatoid arthritis, Histologic examination of an enlarged right axillary lymph node revealed effacement of normal architecture by a polymorphic population of lymphocytes. The recognition that the patient was medically immunosuppressed and the similarity of lymph node histology to that of a polymorphic post-transplantation lymphoid proliferation led to suspicion that the adenopathy might represent an immunosuppression-related lymphoid proliferation, This possibility was supported by regression of the adenopathy on discontinuation of methotrexate, despite continued corticosteroid therapy, which is an outcome reminiscent of the remissions observed with reduction of immunosuppressive therapy in post-transplantation lymphoproliferative disorders, Subsequent ancillary laboratory studies of lymph node tissue included genetic probe analysis, which revealed a monoclonal population of B-lymphocytes containing clonal Epstein-Barr virus DNA. In situ hybridization studies performed on lymph node tissue revealed expression of Epstein-Barr virus-encoded RNA 1 transcripts, and immunohistochemical studies revealed expression of Epstein-Barr virus latent membrane protein 1, These ancillary studies confirmed the similarity to post transplantation lymphoproliferative disorder. Although immunosuppression-related lymphoproliferative disorders share features with malignant lymphoma, the possibility of resolution in situations in which immunosuppression can be reversed provides a distinction from true malignancy and is of profound importance in therapeutic decision making. C1 UNIV TEXAS,HLTH SCI CTR,DEPT PATHOL,SAN ANTONIO,TX 78284. WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236. AUDIE L MURPHY MEM VET ADM MED CTR,SAN ANTONIO,TX 78284. NORTHSIDE HOSP,ATLANTA,GA. FU NCI NIH HHS [KO8-CA01615] NR 40 TC 35 Z9 35 U1 1 U2 1 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0893-3952 J9 MODERN PATHOL JI Mod. Pathol. PD MAR PY 1996 VL 9 IS 3 BP 261 EP 266 PG 6 WC Pathology SC Pathology GA UC335 UT WOS:A1996UC33500018 PM 8685225 ER PT J AU Soref, RA Atzman, Z Shaapur, F Robinson, M Westhoff, R AF Soref, RA Atzman, Z Shaapur, F Robinson, M Westhoff, R TI Infrared waveguiding in Si(1-x-y)GexCy upon silicon SO OPTICS LETTERS LA English DT Article AB Polarization-independent waveguiding at 1.32 and 1.54 mu m was observed in single-crystal S1-x-yGexCy grown nearly lattice matched upon Si(100) by chemical vapor deposition. Losses were <5 dB/cm at 1.54 mu m. Experiments indicate that the band gap of three SiGeC alloy waveguides was in the 0.93-0.99-eV range, in agreement with theory. (C) 1996 Optical Society of America C1 ARIZONA STATE UNIV,DEPT CHEM BIO & MAT ENGN,TEMPE,AZ 85287. LAWRENCE SEMICOND RES LAB INC,TEMPE,AZ 85282. RP Soref, RA (reprint author), USAF,ROME LAB,RL EROC,HANSCOM AFB,BEDFORD,MA 01731, USA. NR 7 TC 16 Z9 16 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD MAR 1 PY 1996 VL 21 IS 5 BP 345 EP 347 DI 10.1364/OL.21.000345 PG 3 WC Optics SC Optics GA TX560 UT WOS:A1996TX56000013 PM 19865400 ER PT J AU Conway, CE AF Conway, CE TI Appreciates stocks SO PHOTONICS SPECTRA LA English DT Letter RP Conway, CE (reprint author), DYESS AFB,SUPPORT CTR,SIMULATOR TRAINING SYST B1,DEPT ENGN,ABILENE,TX, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LAURIN PUBL CO INC PI PITTSFIELD PA BERKSHIRE COMMON PO BOX 1146, PITTSFIELD, MA 01202 SN 0731-1230 J9 PHOTON SPECTRA JI Photon. Spect. PD MAR PY 1996 VL 30 IS 3 BP 12 EP 13 PG 2 WC Optics SC Optics GA TZ190 UT WOS:A1996TZ19000005 ER PT J AU Jauchem, JR Chang, KS Frei, MR AF Jauchem, JR Chang, KS Frei, MR TI Tolazoline decreases survival time during microwave-induced lethal heat stress in anesthetized rats SO PROCEEDINGS OF THE SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE LA English DT Article ID RADIOFREQUENCY RADIATION; BODY-TEMPERATURE; XYLAZINE HYDROCHLORIDE; KETAMINE-HYDROCHLORIDE; SEROTONERGIC AGENTS; THERMAL RESPONSES; BLOOD-PRESSURE; HYPERTHERMIA; DRUGS; YOHIMBINE AB Effects of alpha-adrenergic antagonists have been studied during environmental heating but not during microwave-induced heating. Tolazoline may exert some of its effects via alpha-adrenergic blockade, In the present study, ketamine-anesthetized Sprague-Dawley rats were exposed to 2450-MHz microwaves at an average power density of 60 mW/cm(2) (whole-body specific absorption rate of approximately 14 W/kg) until lethal temperatures were attained. The effects of tolazoline (10 mg/kg body weight) on physiological responses (including changes in body temperature, heart rate, blood pressure, and respiratory rate) were examined. Survival time was significantly shorter in the tolazoline group than in saline-treated animals. In general, heart rate and blood pressure responses were similar to those that occur during environmental heat stress, Heart rate, however, was significantly elevated in animals that received tolazoline, both before and during terminal microwave exposure, It is possible that changes associated with the elevated heart rate (e.g., less cardiac filling) in tolazoline-treated animals resulted in greater susceptibility to microwave-induced heating and the fewer survival time. C1 USAF,ARMSTRONG LAB,OCCUPAT & ENVIRONM HLTH DIRECTORATE,RADIOFREQUENCY RADIAT DIV,BROOKS AFB,TX 78235. TRINITY UNIV,DEPT BIOL,SAN ANTONIO,TX 78212. NR 47 TC 8 Z9 11 U1 0 U2 1 PU BLACKWELL SCIENCE INC PI CAMBRIDGE PA 238 MAIN ST, CAMBRIDGE, MA 02142 SN 0037-9727 J9 P SOC EXP BIOL MED JI Proc. Soc. Exp. Biol. Med. PD MAR PY 1996 VL 211 IS 3 BP 236 EP 243 PG 8 WC Medicine, Research & Experimental SC Research & Experimental Medicine GA TZ230 UT WOS:A1996TZ23000003 PM 8633103 ER PT J AU Berry, WE AF Berry, WE TI Samuel Nelson Drew - In memoriam SO PS-POLITICAL SCIENCE & POLITICS LA English DT Item About an Individual RP Berry, WE (reprint author), USAF,COLORADO SPRINGS,CO 80840, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER POLITICAL SCI ASSN PI WASHINGTON PA 1527 NEW HAMPSHIRE N W, WASHINGTON, DC 20036 SN 1049-0965 J9 PS JI PS-Polit. Sci. Polit. PD MAR PY 1996 VL 29 IS 1 BP 90 EP 90 PG 1 WC Political Science SC Government & Law GA TX252 UT WOS:A1996TX25200023 ER PT J AU Koscho, J AF Koscho, J TI The convergence of networking and broadcasting SO SMPTE JOURNAL LA English DT Letter RP Koscho, J (reprint author), USAF,WASHINGTON,DC 20330, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC MOTION PICTURE TV ENG INC PI WHITE PLAINS PA 595 WEST HARTSDALE AVE, WHITE PLAINS, NY 10607 SN 0036-1682 J9 SMPTE J JI SMPTE J. PD MAR PY 1996 VL 105 IS 3 BP 124 EP 124 PG 1 WC Engineering, Electrical & Electronic; Instruments & Instrumentation; Imaging Science & Photographic Technology; Telecommunications SC Engineering; Instruments & Instrumentation; Imaging Science & Photographic Technology; Telecommunications GA TX448 UT WOS:A1996TX44800005 ER PT J AU Haroun, MA Pires, JA Won, AYJ AF Haroun, MA Pires, JA Won, AYJ TI Suppression of environmentally-induced vibrations in tall buildings by hybrid liquid column dampers SO STRUCTURAL DESIGN OF TALL BUILDINGS LA English DT Article ID MASS AB The conceptual development of hybrid liquid column dampers is presented. The system is based fundamentally on the concept of tuned liquid column dampers and modified to employ instantaneous optimal controls to affect the orifice damping and/or the liquid column pressure actively. Numerical modeling of the system and the development of the control algorithms are presented. The system's effectiveness in suppressing earthquake and wind induced motions in tall buildings is assessed and illustrated by numerical examples. C1 USAF ACAD,DEPT CIVIL ENGN,COLORADO SPRINGS,CO 80840. RP Haroun, MA (reprint author), UNIV CALIF IRVINE,DEPT CIVIL & ENVIRONM ENGN,IRVINE,CA 92717, USA. NR 18 TC 21 Z9 21 U1 0 U2 3 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 1062-8002 J9 STRUCT DES TALL BUIL JI Struct. Des. Tall Build. PD MAR PY 1996 VL 5 IS 1 BP 45 EP 54 PG 10 WC Construction & Building Technology; Engineering, Civil SC Construction & Building Technology; Engineering GA TX866 UT WOS:A1996TX86600003 ER PT J AU Hurley, CK Steiner, N Hoyer, RJ Menchaca, E Mitton, W Simonis, T Hartzman, RJ Johnson, AH Ng, J AF Hurley, CK Steiner, N Hoyer, RJ Menchaca, E Mitton, W Simonis, T Hartzman, RJ Johnson, AH Ng, J TI Novel HLA-B alleles, B*8201, B*3515 and B*5106, add to the complexity of serologic identification of HLA types SO TISSUE ANTIGENS LA English DT Article DE HLA-B; B*8201; B*3515; B*5106 ID MHC CLASS-I; HISTOCOMPATIBILITY ANTIGEN; POSITIVE SELECTION; PEPTIDE-BINDING; MOLECULES; SPECIFICITY; RECOGNITION; RESOLUTION; REPERTOIRE; EPITOPES AB Three class I alleles, B*8201, B*3515 and B*5106, have been described using DNA and cDNA sequencing. The B*8201 allele is most structurally related to B*5602, differing from it by 14 nucleotide substitutions resulting in 5 amino acid differences. The other two alleles, B*3515 and B*5106, differ from their most closely related HLA-B alleles by 2-3 nucleotide substitutions resulting in 1-2 amino acid substitutions, respectively. The majority of nucleotide substitutions marking these new alleles are observed in other HLA-B alleles suggesting that gene conversion and/or reciprocal recombination have created this diversity. All of the amino acid substitutions are predicted to alter the antigen binding site of the HLA-B molecule. The newly defined HLA-B allelic products were originally defined by their unusual serologic reactivity patterns. The B*8201 allelic product is serologically typed as a B ''blank'' or as a variant of B22 or B45. These patterns and the serologic reactivity of the other newly described allelic products are consistent with the protein sequence homology among specific HLA-B molecules. While serology remains a powerful tool for detecting HLA diversity, alleles generated by events resulting in the sharing of HLA sequence polymorphisms among alleles at a locus will continue to create complexity in the interpretation of typing results. C1 GEORGETOWN UNIV,SCH MED,DEPT MICROBIOL & IMMUNOL,WASHINGTON,DC. WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236. USN,MED RES INST,BETHESDA,MD. NIH,HLA LAB,BETHESDA,MD 20892. GEORGETOWN UNIV,SCH MED,DEPT PEDIAT,WASHINGTON,DC 20007. NR 29 TC 21 Z9 22 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0001-2815 J9 TISSUE ANTIGENS JI Tissue Antigens PD MAR PY 1996 VL 47 IS 3 BP 179 EP 187 DI 10.1111/j.1399-0039.1996.tb02538.x PG 9 WC Cell Biology; Immunology; Pathology SC Cell Biology; Immunology; Pathology GA UG189 UT WOS:A1996UG18900002 PM 8740766 ER PT J AU Butler, WP AF Butler, WP TI Comments on Maine urchin divers - Response SO UNDERSEA & HYPERBARIC MEDICINE LA English DT Letter RP Butler, WP (reprint author), ARMSTRONG LAB,DAVIS HYPERBAR DIV,BROOKS AFB,TX 78235, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNDERSEA & HYPERBARIC MEDICAL SOC INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1066-2936 J9 UNDERSEA HYPERBAR M JI Undersea Hyperb. Med. PD MAR PY 1996 VL 23 IS 1 BP 56 EP 57 PG 2 WC Marine & Freshwater Biology; Medicine, Research & Experimental SC Marine & Freshwater Biology; Research & Experimental Medicine GA UC949 UT WOS:A1996UC94900012 ER PT J AU Manoranjan, VS Stauffer, TB AF Manoranjan, VS Stauffer, TB TI Exact solution for contaminant transport with kinetic Langmuir sorption SO WATER RESOURCES RESEARCH LA English DT Article ID BINARY ION-EXCHANGE; REACTIVE SOLUTES; POROUS-MEDIA; TRAVELING WAVES; ADSORPTION; EQUILIBRIUM; MODEL AB We study a contaminant transport model with Langmuir sorption under nonequilibrium conditions and show that the aqueous phase concentration profile can be obtained exactly in the form of a traveling wave front. The methodology of finding the exact solution is outlined, and an illustrative example is presented. C1 ARMSTRONG LAB,TYNDALL AFB,FL 32403. RP Manoranjan, VS (reprint author), WASHINGTON STATE UNIV,DEPT PURE & APPL MATH,PULLMAN,WA 99164, USA. NR 12 TC 10 Z9 10 U1 0 U2 4 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD MAR PY 1996 VL 32 IS 3 BP 749 EP 752 DI 10.1029/95WR03240 PG 4 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA TX708 UT WOS:A1996TX70800023 ER PT J AU Jones, DIG AF Jones, DIG TI Reflections on damping technology at the end of the twentieth century SO JOURNAL OF SOUND AND VIBRATION LA English DT Article ID VIBRATIONS AB A somewhat personal account is presented of progress in damping technology during the latter half of the twentieth century, highlighting the contributions of Professor Elfyn J. Richards. (C) 1996 Academic Press Limited C1 WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433. NR 56 TC 6 Z9 6 U1 0 U2 1 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-460X J9 J SOUND VIB JI J. Sound Vibr. PD FEB 29 PY 1996 VL 190 IS 3 BP 449 EP 462 DI 10.1006/jsvi.1996.0073 PG 14 WC Acoustics; Engineering, Mechanical; Mechanics SC Acoustics; Engineering; Mechanics GA TX734 UT WOS:A1996TX73400010 ER PT J AU Michalek, JE Pirkle, JL Caudill, SP Tripathi, RC Patterson, DC Needham, LL AF Michalek, JE Pirkle, JL Caudill, SP Tripathi, RC Patterson, DC Needham, LL TI Pharmacokinetics of TCDD in veterans of operation ranch hand: 10-year follow-up SO JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH LA English DT Article ID HALF-LIFE; REGRESSION; VIETNAM AB Using multiple measurements from serum collected over 10 yr (1982, 1987, and 1992), we estimated the half-life of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in 213 veterans of Operation Ranch Hand the Air Force unit responsible for the aerial spraying of Agent Orange in Vietnam. The potential influences of age, percent body fat, and changes in percent body fat on the half-life estimate were also examined. The mean decay rate of TCDD for these veterans is 0.0797 per year with 95% confidence interval 0.0727 to 0.0868 per year; the corresponding half-life estimate is 8.7 yr with 95% confidence interval 8.0-9.5 yr. Half-life increased significantly with increasing body fat, but not with age or relative changes in percent body fat. C1 CTR DIS CONTROL & PREVENT, ATLANTA, GA 30341 USA. UNIV TEXAS SAN ANTONIO, SAN ANTONIO, TX 78285 USA. RP Michalek, JE (reprint author), ARMSTRONG LAB, AOEP, 2510 KENNEDY CIRCLE, SUITE 117, BROOKS AFB, TX 78235 USA. RI Needham, Larry/E-4930-2011 NR 14 TC 108 Z9 110 U1 1 U2 5 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA SN 0098-4108 J9 J TOXICOL ENV HEALTH JI J. Toxicol. Environ. Health PD FEB 23 PY 1996 VL 47 IS 3 BP 209 EP 220 DI 10.1080/009841096161744 PG 12 WC Environmental Sciences; Public, Environmental & Occupational Health; Toxicology SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Toxicology GA TW555 UT WOS:A1996TW55500001 PM 8604146 ER PT J AU Ramabadran, UB Vuppuladhadium, R Small, D Zelmon, DE Kennedy, GC AF Ramabadran, UB Vuppuladhadium, R Small, D Zelmon, DE Kennedy, GC TI Optical and structural characterization of triallyl thiourea cadmium chloride (ATCC) SO APPLIED OPTICS LA English DT Article ID BROMIDE ATMB CRYSTAL AB We report measurements of the structural and optical properties of triallyl thiourea cadmium chloride (ATCC). X-ray diffraction determined the point group to be 3 and the space group to be R(3). ATCC is one of a series of semiorganic crystals that demonstrated good optical frequency conversion. We have investigated this material for its potential value in electro-optic and piezoelectric applications. (C) 1996 Optical Society of America C1 CLEVELAND CRYSTALS INC, HIGHLAND HTS, OH 44117 USA. RP Ramabadran, UB (reprint author), USAF, WRIGHT LAB, MAT DIRECTORATE, DAYTON, OH 45433 USA. NR 12 TC 7 Z9 7 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1559-128X EI 2155-3165 J9 APPL OPTICS JI Appl. Optics PD FEB 20 PY 1996 VL 35 IS 6 BP 903 EP 906 DI 10.1364/AO.35.000903 PG 4 WC Optics SC Optics GA TY059 UT WOS:A1996TY05900004 PM 21069086 ER PT J AU Bossert, DJ Gallant, D AF Bossert, DJ Gallant, D TI Improved method for gain/index measurements of semiconductor lasers SO ELECTRONICS LETTERS LA English DT Article DE semiconductor junction lasers; gain measurement ID GAIN AB An improved experimental method for measuring gain and refractive index in semiconductor lasers from below-threshold amplified spontaneous emission spectra is presented. Broad-area, as opposed to narrow-stripe width, diode lasers and a far-field spatial filtering technique are employed to eliminate uncertainties associated with lateral waveguiding and carrier confinement. C1 ROCKWELL POWER SYST,KIRTLAND AFB,NM 87185. RP Bossert, DJ (reprint author), USAF,PHILLIPS LAB,LIDA,3550 ABERDEEN AVE SE,KIRTLAND AFB,NM 87117, USA. NR 9 TC 16 Z9 16 U1 0 U2 5 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD FEB 15 PY 1996 VL 32 IS 4 BP 338 EP 339 DI 10.1049/el:19960193 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA UL770 UT WOS:A1996UL77000042 ER PT J AU Smith, RE Waller, SG Dixon, PS Kloess, PM Manning, CA AF Smith, RE Waller, SG Dixon, PS Kloess, PM Manning, CA TI Effect of mitomycin c on viability and proliferation of cultured human pterygia fibroblasts SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,DEPT OPHTHALMOL,SAN ANTONIO,TX. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 371 EP 371 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39700370 ER PT J AU Rosenberg, ML AF Rosenberg, ML TI Paroxysmal pupillary contraction to darkness: A normal response SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,DEPT NEUROL,SAN ANTONIO,TX 78236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 750 EP 750 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39700748 ER PT J AU Casey, P Kelly, P Giovannini, J Dunlap, W Bauman, W AF Casey, P Kelly, P Giovannini, J Dunlap, W Bauman, W TI Outcome measures in diabetic retinopathy screening SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,DEPT OPHTHALMOL,LACKLAND AFB,TX. BROOKE ARMY MED CTR,DEPT OPHTHALMOL,FT SAM HOUSTON,TX. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 992 EP 992 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39700990 ER PT J AU Pierce, BJ Howard, IP AF Pierce, BJ Howard, IP TI Orientation and the perception of depth contrast in slanted and included surfaces SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 USAF,ARMSTRONG LAB,AIRCREW TRAINING RES DIV,MESA,AZ. YORK UNIV,CTR VIS RES,TORONTO,ON M3J 2R7,CANADA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 1325 EP 1325 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39701323 ER PT J AU Grigsby, SS Tsou, BH AF Grigsby, SS Tsou, BH TI Occluded edges and the apparent depth of ambiguous surfaces SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 LOGICON TECH SERV INC,DAYTON,OH. USAF,ARMSTRONG LAB,WRIGHT PATTERSON AFB,OH. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 1326 EP 1326 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39701324 ER PT J AU Kang, RN Norton, TT AF Kang, RN Norton, TT TI Electronmicroscopic examination of tree shrew sclera during normal development, induced myopia, and recovery SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 UNIV ALABAMA,DEPT PHYSIOL OPT,BIRMINGHAM,AL 35294. ARMSTRONG LAB,BROOKS AFB,TX. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 1491 EP 1491 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39701489 ER PT J AU Pahmeier, NE Holck, DEE Wehrly, S Dutton, JJ AF Pahmeier, NE Holck, DEE Wehrly, S Dutton, JJ TI Changes in astigmatism after blepharoptosis surgery measured by corneal topography SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,SAN ANTONIO,TX 78236. MACDILL REG MED CTR,TAMPA,FL. DUKE UNIV,MED CTR,DURHAM,NC 27710. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 2588 EP 2588 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39702585 ER PT J AU Baldwin, JB Loop, MS Edwards, DJ AF Baldwin, JB Loop, MS Edwards, DJ TI Magnitude and time course of interocular suppression is stimulus selective SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 USAF,WASHINGTON,DC 20330. UNIV ALABAMA,SCH OPTOMETRY,DEPT PHYSIOL OPT,BIRMINGHAM,AL 35294. UNIV ALABAMA,DEPT PSYCHOL,BIRMINGHAM,AL 35294. NR 0 TC 3 Z9 3 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 3016 EP 3016 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39703012 ER PT J AU Loop, MS Baldwin, JB Edwards, DJ AF Loop, MS Baldwin, JB Edwards, DJ TI Permanent suppression is wavelength specific SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 USAF,WASHINGTON,DC 20330. UNIV ALABAMA,SCH OPTOMETRY,DEPT PHYSIOL OPT,BIRMINGHAM,AL 35294. UNIV ALABAMA,DEPT PSYCHOL,BIRMINGHAM,AL 35294. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 3017 EP 3017 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39703013 ER PT J AU Bias, MF Rosenberg, ML AF Bias, MF Rosenberg, ML TI Physiologic anisocoria SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236. NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 3159 EP 3159 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39703155 ER PT J AU Toth, CA Narayan, DG Cain, CP DiCarlo, CD Rockwell, B Roach, WP AF Toth, CA Narayan, DG Cain, CP DiCarlo, CD Rockwell, B Roach, WP TI Histopathology of ultrashort pulse laser retinal lesions SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 DUKE UNIV,CTR EYE,DURHAM,NC. USAF,ARMSTRONG LAB,BROOKS AFB,TX. ANALYT SCI CORP,SAN ANTONIO,TX. USAF,OFF SCI RES,BOLLING AFB,VA. RI toth, cynthia/F-5614-2011 NR 0 TC 1 Z9 1 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 3170 EP 3170 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39703166 ER PT J AU Barad, JB Yates, JT AF Barad, JB Yates, JT TI Automated dark adaptometry SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,DEPT OPHTHALMOL,SAN ANTONIO,TX 78236. SCH AEROSP MED,OPHTHALMOL BRANCH,BROOKS AFB,TX. NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 3222 EP 3222 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39703218 ER PT J AU Reed, JB Yates, JT Linnemeyer, RS Scales, DK AF Reed, JB Yates, JT Linnemeyer, RS Scales, DK TI Bartonella henselae stellate neuroretinitis alters contrast sensitivity, visually evoked potentials, and color vision SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,DEPT OPHTHALMOL,BROOKS AFB,TX. VISUAL ELECTRODIAGNOST LAB,SAN ANTONIO,TX. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 3251 EP 3251 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39703247 ER PT J AU Gleason, GA Riegler, JT AF Gleason, GA Riegler, JT TI Do clinical refractions result in best visual acuity? SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 USAF,ARMSTRONG LAB,WRIGHT PATTERSON AFB,OH. LOGICON TECH SERV INC,DAYTON,OH. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 3296 EP 3296 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39703291 ER PT J AU Massios, SC Geanon, JD AF Massios, SC Geanon, JD TI Development of an anterior capsulotomy instrument SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,DEPT OPHTHALMOL,LACKLAND AFB,TX 78236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD FEB 15 PY 1996 VL 37 IS 3 BP 3504 EP 3504 PG 1 WC Ophthalmology SC Ophthalmology GA TX397 UT WOS:A1996TX39703498 ER PT J AU Mozer, JB Zehnder, JA AF Mozer, JB Zehnder, JA TI Lee vorticity production by large-scale tropical mountain ranges .1. Eastern North Pacific tropical cyclogenesis SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article ID PAST 3-DIMENSIONAL OBSTACLES; MESOSCALE MOUNTAINS; CYCLONE FORMATION; WAVES; DISTURBANCES; SYSTEMS; SUMMER AB Numerical simulations using the Penn State University/NCAR MM4 model are performed to examine a dry, stably stratified, zonal easterly flow past a large-scale three-dimensional mountain range in a rotating, initially barotropic, atmosphere. Upstream blocking by the mountain range diverts the flow primarily to the south and around the mountain. Conservation of potential vorticity results in the formation of a horizontal jet at low levels south of the mountain. This jet is barotropically unstable and leads to a continuous production of synoptic-scale vorticity maxima, which separate from the mountain and propagate downstream. Simulations using an idealized mountain representative of the Sierra Madre in Mexico imply that this mechanism may be an important contributor to tropical cyclogenesis in the eastern North Pacific Ocean. The wave train produced in the simulations corresponds to waves with 3-7 day periods, which have been identified observationally in the eastern North Pacific region. The sensitivity of this effect to the stability of the basic state and the upstream wind speed is investigated. A simulation using realistic topography is also presented and indicates that the Isthmus of Tehuantepec provides a suitable location for jet formation. C1 UNIV ARIZONA,INST ATMOSPHER PHYS,TUCSON,AZ 85721. RP Mozer, JB (reprint author), USAF,PHILLIPS LAB,GPAA,29 RANDOLPH RD,BEDFORD,MA 01731, USA. NR 36 TC 20 Z9 20 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0022-4928 J9 J ATMOS SCI JI J. Atmos. Sci. PD FEB 15 PY 1996 VL 53 IS 4 BP 521 EP 538 DI 10.1175/1520-0469(1996)053<0521:LVPBLS>2.0.CO;2 PG 18 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA TY551 UT WOS:A1996TY55100001 ER PT J AU Mozer, JB Zehnder, JA AF Mozer, JB Zehnder, JA TI Lee vorticity production by large-scale tropical mountain ranges .2. A mechanism for the production of African waves SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article ID MESOSCALE MOUNTAINS; PHASE III; DISTURBANCES; GATE; ENERGETICS; ATLANTIC; GENESIS AB A mechanism that acts to produce vorticity in the lee of large-scale mountain ranges embedded in an easterly how in a stably stratified rotating atmosphere is investigated as it applies to the production of westward-propagating African waves. Three-dimensional numerical simulations of a dry, adiabatic flow using the PSU/NCAR MM4 model show that the Hoggar and Atlas Mountains of west-central Africa block low-level easterly flow, resulting in a barotropically unstable jet that is associated with the continuous production of lee vortices, which separate from the mountain and propagate downstream. The wavelength of the disturbances is roughly 1600 km, and they propagate to the west with a period of about 2.5 days. These characteristics correspond to those of observed waves in the Africa-Atlantic region. It is also shown that flow interaction with the topography of north-central Africa results in a midtropospheric easterly jet having a maximum wind speed near 10 m s(-1) between 15 degrees and 20 degrees N, 0 degrees and 10 degrees E. The location and magnitude of this jet correspond to the so-called African easterly jet, which is usually attributed to strong surface temperature gradients over the continent of Africa. The numerical simulations suggest that vertically propagating internal gravity waves associated with flow over the topography may provide a constant source of zonal momentum for the maintenance of the midtropospheric African easterly jet. C1 UNIV ARIZONA,INST ATMOSPHER PHYS,TUCSON,AZ 85721. RP Mozer, JB (reprint author), USAF,PHILLIPS LAB,29 RANDOLPH RD,BEDFORD,MA 01731, USA. NR 28 TC 11 Z9 11 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0022-4928 J9 J ATMOS SCI JI J. Atmos. Sci. PD FEB 15 PY 1996 VL 53 IS 4 BP 539 EP 549 DI 10.1175/1520-0469(1996)053<0539:LVPBLS>2.0.CO;2 PG 11 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA TY551 UT WOS:A1996TY55100002 ER PT J AU Puffer, RL AF Puffer, RL TI Battles: A concise dictionary - Hogg,IV SO LIBRARY JOURNAL LA English DT Book Review RP Puffer, RL (reprint author), USAF,HIST PROG,EDWARDS AFB,CA, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD FEB 15 PY 1996 VL 121 IS 3 BP 142 EP 142 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA TV123 UT WOS:A1996TV12300034 ER PT J AU Song, QW Wang, XM Bussjager, R AF Song, QW Wang, XM Bussjager, R TI Lanthanum-modified lead zirconate titanate ceramic wafer-based electro-optic dynamic diverging lens SO OPTICS LETTERS LA English DT Article ID PLZT AB We present a lanthanum-modified lead zirconate titanate (PLZT) ceramic wafer-based electro-optic dynamic diverging lens. A quadratic refractive-index modulation is induced by application of a linearly changing electrical field inside a flat PLZT wafer. The design offers a simple and compact structure that produces a smooth phase modulation distribution. A fabricated dynamic lens of 2 mm x 2 mm demonstrates a continuous variable focal length from infinity with no applied voltage to negative 0.77 m with a voltage of 400 V. (C) 1996 Optical Society of America C1 USAF,PHOTON CTR,ROME LAB,GRIFFISS AFB,NY 13441. RP Song, QW (reprint author), SYRACUSE UNIV,DEPT ELECT & COMP ENGN,SYRACUSE,NY 13244, USA. NR 10 TC 12 Z9 12 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD FEB 15 PY 1996 VL 21 IS 4 BP 242 EP 244 DI 10.1364/OL.21.000242 PG 3 WC Optics SC Optics GA TV855 UT WOS:A1996TV85500004 PM 19865366 ER PT J AU Morris, TL Miller, JC AF Morris, TL Miller, JC TI Electrooculographic and performance indices of fatigue during simulated flight SO BIOLOGICAL PSYCHOLOGY LA English DT Article DE flight; simulation; electrooculogram; EOG; subjective fatigue; performance error ID SACCADES AB The investigation evaluated specific components of eye and eyelid movement as predictors of performance decrements resulting from pilot fatigue. Ten partially sleep deprived pilots flew a GAT-1 moving-base flight simulator on a 4.5-h sortie. The scored flight portion consisted of eight legs, each leg made up of two segments, a flight maneuvers task (FMT) and a straight and level flying task (SLT). Error scores were calculated across altitude, airspeed, heading, and vertical velocity. An electrooculogram provided measures of blink rate (BR), blink duration, long closure rate (LCR), blink amplitude (BA), saccade velocity, saccade rate, and peak saccade velocity. Subjective fatigue, workload and sleepiness were estimated using the USAFSAM seven-point forced-choice scales, the Stanford Sleepiness Scale? and the USAFSAM Sleep Survey Form. Error scores increased significantly during the first seven legs of the sortie and decreased slightly for the last leg. Subjective reports of fatigue increased significantly over time and were positively correlated with increased error. For the combined data set and for FMTs alone, BA was the best predictor of changes in error with decreased amplitude corresponding to increased error. BR and LCR were the second and third best predictors, respectively. For SLTs alone, LCR and BA were the first and second best predictors of increased error, respectively. The investigation demonstrated that measurable flying performance decrements do occur due to changes in fatigue and that one can measure physiological correlates of those performance decrements. C1 TEXAS A&M UNIV,DEPT IND ENGN,COLLEGE STN,TX 77843. USAF,SCH AEROSP MED,CREW PERFORMANCE BRANCH,BROOKS AFB,TX 78235. NR 44 TC 82 Z9 88 U1 1 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0301-0511 J9 BIOL PSYCHOL JI Biol. Psychol. PD FEB 5 PY 1996 VL 42 IS 3 BP 343 EP 360 DI 10.1016/0301-0511(95)05166-X PG 18 WC Psychology, Biological; Behavioral Sciences; Psychology; Psychology, Experimental SC Psychology; Behavioral Sciences GA TZ813 UT WOS:A1996TZ81300007 PM 8652752 ER PT J AU McCann, GJ Bowersox, RDW AF McCann, GJ Bowersox, RDW TI Experimental investigation of supersonic gaseous injection into a supersonic freestream SO AIAA JOURNAL LA English DT Article AB An experimental study of the mean and turbulent flowfield associated with low-angled supersonic gaseous injection into a supersonic freestream was performed, Air was injected at Mach 1.8, with an effective back pressure ratio of 3.0, through an orifice at an angle of 25 deg into a Mach 2.9 air freestream (Re/m = 15 x 10(6)), Cross-film anemometry and conventional mean flow probe surveys were acquired across the plume at two downstream stations (x/d = 20 and 40), Schlieren photography was used for qualitative how visualization. Turbulence measurements included contours of the turbulent kinetic energy and the full compressible Reynolds shear stresses in both the x-y and x-z planes. Mean flow data included Mach number, three-dimensional velocity components, and vorticity. The measurements indicated that the mean and turbulent flow structure of the injection plume were strongly influenced by the presence of a counter-rotating vortex pair (\w(x)\(max) approximate to 15,000/s). The turbulent kinetic energy was found to have two peaks colocated with the vortices. The turbulent shear stress distributions across the plume were found to be highly three dimensional and complicated by both the additional strain rates associated with the vorticity and turbulent convection. The present results also implied that the compressibility terms in the Reynolds shear stress accounted for about 67.0-75.0% of the total shear stress level, i.e., <(u rho'nu')over bar>/<(rho u'nu')over bar> and <(u rho'w')over bar>/<(rho u'w')over bar> were in the range of 2.0-3.0. RP McCann, GJ (reprint author), USAF,INST TECHNOL,DEPT AERONAUT & ASTRONAUT,WRIGHT PATTERSON AFB,OH 45433, USA. NR 18 TC 13 Z9 16 U1 0 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0001-1452 J9 AIAA J JI AIAA J. PD FEB PY 1996 VL 34 IS 2 BP 317 EP 323 DI 10.2514/3.13066 PG 7 WC Engineering, Aerospace SC Engineering GA TT877 UT WOS:A1996TT87700014 ER PT J AU Cobb, RG Canfield, RA Liebst, BS AF Cobb, RG Canfield, RA Liebst, BS TI Finite element model tuning using automated structural optimization system software SO AIAA JOURNAL LA English DT Article ID STIFFNESS; IDENTIFICATION; IMPROVEMENT; DERIVATIVES; ADJUSTMENT AB A method of adjusting analytical finite element models to measured data is presented. The algorithm uses a mathematical optimization strategy to minimize deviations between measured and analytical modal frequencies and partial mode shapes. A mode tracking algorithm is used to identify and account for mode switching during the optimization process. The algorithm was successfully implemented using the Automated Structural Optimization System Software. Experimental results are presented for tuning a lightly damped 6-m flexible frame structure. The results demonstrate excellent agreement between the tuned model and measured data and illustrate the importance of off-nominal validation before accepting a model for simulation purposes. RP Cobb, RG (reprint author), USAF,INST TECHNOL,DEPT AERONAUT & ASTRONAUT,BLDG 640,2950 P ST,WRIGHT PATTERSON AFB,OH 45433, USA. NR 22 TC 6 Z9 6 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0001-1452 J9 AIAA J JI AIAA J. PD FEB PY 1996 VL 34 IS 2 BP 392 EP 399 DI 10.2514/3.13076 PG 8 WC Engineering, Aerospace SC Engineering GA TT877 UT WOS:A1996TT87700024 ER PT J AU Doerr, CL Hilton, TJ Hermesch, CB AF Doerr, CL Hilton, TJ Hermesch, CB TI Effect of thermocycling on the microleakage of conventional and resin-modified glass ionomers SO AMERICAN JOURNAL OF DENTISTRY LA English DT Article ID CEMENTS; LINERS AB Purpose: To compare the effect of thermocycling on the microleakage of conventional and resin modified glass ionomer restorative materials. Materials and Methods: Class V preparations, centered on the CEJ, were prepared on the lingual and facial surfaces of 30 extracted human third molar teeth. Preparations were conditioned and restored randomly on one surface with Ketac-Fil and on the other surface with Photac-Fil. Restorations were protected during curing, finishing, and storage with Ketac-Glaze. Specimens were aged in room temperature distilled water for 7 days. Half of the specimens were thermocycled for 2,500 cycles in 5 degrees-55 degrees water baths with 5-second dwell times. All specimen apices were sealed with red compound, occlusal fissures sealed with pit/fissure sealant, and surfaces painted to within 1.5 mm of restoration margins with red nail polish. Specimens were stained with 5% methylene blue, invested in orthodontic resin, and sectioned faciolingually. The percentage of dye penetration along the tooth restoration interface was measured with a digital imaging system. Results: Statistical analysis showed that neither thermocycling or type of material had a significant effect on dye penetration (P>0.5). C1 WILFORD HALL USAF MED CTR,DEPT GEN DENT,LACKLAND AFB,TX 78236. NR 21 TC 13 Z9 14 U1 0 U2 0 PU MOSHER & LINDER, INC PI SAN ANTONIO PA 9859 IH-10 WEST, SUITE 107/489, SAN ANTONIO, TX 78230-2236 SN 0894-8275 J9 AM J DENT JI Am. J. Dent. PD FEB PY 1996 VL 9 IS 1 BP 19 EP 21 PG 3 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA TX875 UT WOS:A1996TX87500004 PM 9002809 ER PT J AU Smith, DK May, DA Phillips, P AF Smith, DK May, DA Phillips, P TI MR imaging of the anterior cruciate ligament: Frequency of discordant findings on sagittal-oblique images and correlation with arthroscopic findings SO AMERICAN JOURNAL OF ROENTGENOLOGY LA English DT Article ID LATERAL FEMORAL NOTCH; KNEE; TEARS; SIGN; INJURIES; CLASSIFICATION; PREVALENCE; FRACTURE; LESIONS AB OBJECTIVE. The purposes of this study were to determine the frequency of discordant MR findings of the anterior cruciate ligament (ACL) using sagittal-oblique images and the arthroscopic integrity of the ACL in knees with a discordant MR appearance. MATERIALS AND METHODS. The frequency of discordant MR features was determined by independently reviewing the sagittal-oblique images of 53 consecutive patients undergoing subsequent arthroscopic surgery. The first 25 consecutive knees were examined using a conventional, dual-echo, T2-weighted spin-echo (SE) sequence; the subsequent 28 consecutive knees were examined using both a T1-weighted SE (T1) and a fat-suppressed, fast spin-echo (FSE) T2-weighted sequence. Two examiners who were unaware of patient identification and arthroscopic results evaluated only the sagittal images that included the ACL. Each reviewer graded the ACL as torn or intact. The MR appearance was considered discordant when one UR sequence showed disrupted or poorly seen ACL fibers and the other sequence showed intact ACL fibers. The arthroscopic integrity of the ACL was determined for the 20 knees with a discordant MR appearance. RESULTS. A discordant MR appearance of the ACL was seen in 20 of the 53 knees (38%), including 10 knees evaluated using conventional T2-weighted sequences (40%) and 10 knees using T1/FSE T2 (36%) sequences. Arthroscopic examination of these knees showed intact ACL fibers in all 20 knees; the ACL was normal in 18 knees and a partial tear was questioned in two knees. CONCLUSION. A discordant appearance of the ACL was frequently encountered (38%) using either conventional T2-weighted sequences or T1 and FSE MR sequences in the sagittal-oblique plane. Intact ACL fibers were found during arthroscopy in all 20 knees with a discordant MR appearance. C1 WILFORD HALL USAF MED CTR,DEPT RADIOL,LACKLAND AFB,TX 78236. MECKLENBURG RADIOL ASSOCIATES,PRESBYTERIAN HOSP,CHARLOTTE,NC. NR 18 TC 16 Z9 18 U1 0 U2 0 PU AMER ROENTGEN RAY SOC PI RESTON PA 1891 PRESTON WHITE DR SUBSCRIPTION FULFILLMENT, RESTON, VA 22091 SN 0361-803X J9 AM J ROENTGENOL JI Am. J. Roentgenol. PD FEB PY 1996 VL 166 IS 2 BP 411 EP 413 PG 3 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA TR343 UT WOS:A1996TR34300034 PM 8553957 ER PT J AU Allen, RC Norris, RL AF Allen, RC Norris, RL TI Efficacy of widow spider antivenin - Reply SO ANNALS OF EMERGENCY MEDICINE LA English DT Letter ID ENVENOMATION C1 STANFORD UNIV,MED CTR,DIV EMERGENCY MED,STANFORD,CA 94305. RP Allen, RC (reprint author), 24TH SPECIAL TACT SQUADRON,POPE AFB,NC 28308, USA. NR 3 TC 1 Z9 1 U1 0 U2 0 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0196-0644 J9 ANN EMERG MED JI Ann. Emerg. Med. PD FEB PY 1996 VL 27 IS 2 BP 273 EP 273 PG 1 WC Emergency Medicine SC Emergency Medicine GA TW104 UT WOS:A1996TW10400031 ER PT J AU Brown, TM Skop, BP AF Brown, TM Skop, BP TI Nitroglycerin in the treatment of the serotonin syndrome SO ANNALS OF PHARMACOTHERAPY LA English DT Letter ID ATHEROSCLEROSIS RP Brown, TM (reprint author), WILFORD HALL USAF MED CTR,DEPT PSYCHIAT,2200 BERGQUIST DR,SUITE 1,LACKLAND AFB,TX 78236, USA. NR 11 TC 18 Z9 18 U1 0 U2 0 PU HARVEY WHITNEY BOOKS CO PI CINCINNATI PA PO BOX 42696, CINCINNATI, OH 45242 SN 1060-0280 J9 ANN PHARMACOTHER JI Ann. Pharmacother. PD FEB PY 1996 VL 30 IS 2 BP 191 EP 192 PG 2 WC Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA TV831 UT WOS:A1996TV83100017 PM 8835057 ER PT J AU Bolton, JWR AF Bolton, JWR TI Traumatic tricuspid valve injury: Leaner resuspension repair SO ANNALS OF THORACIC SURGERY LA English DT Article ID THORACIC TRAUMA; RUPTURE AB Blunt traumatic rupture of the tricuspid valve is exceedingly uncommon, and injury of the tricuspid valve due to penetrating trauma appears to be even more rare. Presented here is a case of tricuspid valve injury due to penetrating cardiac trauma repaired by leaflet resuspension 17 years later. C1 WILFORD HALL USAF MED CTR,DEPT CARDIOTHORAC SURG,LACKLAND AFB,TX 78236. NR 7 TC 11 Z9 11 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0003-4975 J9 ANN THORAC SURG JI Ann. Thorac. Surg. PD FEB PY 1996 VL 61 IS 2 BP 721 EP 722 DI 10.1016/0003-4975(95)00860-8 PG 2 WC Cardiac & Cardiovascular Systems; Respiratory System; Surgery SC Cardiovascular System & Cardiology; Respiratory System; Surgery GA TU362 UT WOS:A1996TU36200053 PM 8572800 ER PT J AU Yu, H Bruno, JG AF Yu, H Bruno, JG TI Immunomagnetic-electrochemiluminescent detection of Escherichia coli O157 and Salmonella typhimurium in foods and environmental water samples SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID LABELED ANTIBODY PROCEDURE; LATEX AGGLUTINATION; DNA; SEROTYPE; SEPARATION; 0157-H7; ASSAYS; FECES AB Hemorrhagic Escherichia coli O157:H7 strains and other virulent enteric pathogens can pose a serious health threat in tainted meats, poultry, and even drinking water. Traditional culture-based methods for assay of enteric pathogens in foods and water sources are relatively slow, and results can be ambiguous, Immunomagnetic separation (IMS) and detection methods have been investigated and appear promising for rapid bacterial assay of foods and environmental samples, In this work, a commercial sensor which combines IMS with electrochemiluminescence (ECL) detection is evaluated for detection of E, coli O157 and Salmonella typhimurium in foods and fomites, Results indicate that detection limits are in the range of 100 to 1,000 bacteria per mi in pristine buffer for E, coli O157 and S, typhimurium, respectively, or 1,000 to 2,000 bacteria per ml in food samples (depending on the sample) and that total processing and assay time is rapid (<1 h) even in food samples, An immunologic ''hook'' or high-antigen-concentration prozone effect was observed above 10(4) and 10(5) bacteria per ml for E. coli O157 and S. typhimurium, respectively, IMS was accomplished in milk, juices, serum, supernatant fluids from ground beef, finely minced chicken, and fish suspensions as well as several freshwater sources and followed by ECL assay, Some samples, especially fish, gave unexpectedly high background ECL, Conversely, low ECL intensity was observed in nonfat and 2% fat milk samples, which appeared to be related to binding or entrapment of the antibody-coated magnetic beads by particulates in the milk, as revealed by microscopy. Results of this evaluation suggest the feasibility of immunomagnetic-ECL methodology for rapid, sensitive, and facile preliminary screening of various foods and fomites for the presence of virulent enteric pathogens. C1 USAF,ARMSTRONG LAB,EQC,ENVIRON DIRECTORATE,APPL RES ASSOCIATES,TYNDALL AFB,FL 32403. USA,EDGEWOOD RES DEV & ENGN CTR,SYST RES LABS INC,ABERDEEN PROVING GROUND,MD 21010. NR 33 TC 183 Z9 191 U1 1 U2 30 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0099-2240 J9 APPL ENVIRON MICROB JI Appl. Environ. Microbiol. PD FEB PY 1996 VL 62 IS 2 BP 587 EP 592 PG 6 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA TT690 UT WOS:A1996TT69000043 PM 8593058 ER PT J AU Miller, MMD Hinkin, DT AF Miller, MMD Hinkin, DT TI The ''N+7 rule'' for tibial tunnel placement in endoscopic anterior cruciate ligament reconstruction SO ARTHROSCOPY LA English DT Article DE anterior cruciate ligament reconstruction; tibial tunnel; graft placement; graft fixation AB Tibial tunnel placement during endoscopic anterior cruciate ligament (ACL) reconstruction has received increased emphasis in the recent literature, Appropriate tunnel length is a critical technical consideration. A tunnel that is too short results in graft extrusion, necessitating supplemental fixation techniques, A tunnel that is too long may make distal fixation and femoral tunnel placement difficult. A simple rule is proposed that allows for correct tunnel length and allows placement of the bone plug consistently within the tibial tunnel, allowing interference screw fixation. C1 UNIFORMED SERV UNIV HLTH SCI,COLORADO SPRINGS,CO. USAF ACAD,COLORADO SPRINGS,CO 80840. NR 9 TC 39 Z9 40 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0749-8063 J9 ARTHROSCOPY JI Arthroscopy PD FEB PY 1996 VL 12 IS 1 BP 124 EP 126 DI 10.1016/S0749-8063(96)90234-0 PG 3 WC Orthopedics; Surgery SC Orthopedics; Surgery GA TU740 UT WOS:A1996TU74000025 PM 8838744 ER PT J AU Grayson, JK Lyons, TJ AF Grayson, JK Lyons, TJ TI Cancer incidence in United States Air Force aircrew, 1975-89 SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID PILOTS; MORTALITY AB We compared the cancer incidence of male United States Air Force (USAF) aircrew (342 cancers, 532,980.97 man-years) with non-flying Air Force officers (827 cancers, 1,084,330.08 man-years) between 1975-89. Methods: Incident cancer cases for both aviators and nonflying officers were obtained from USAF hospitalization records. Age-adjusted standardized incidence ratios (SIR's) were calculated for aircrew using data from the National Cancer Institute's Surveillance Epidemiology and End Results (SEER) program. Aviator age-adjusted cancer rate ratios were also obtained using non-flying officers as an internal comparison group. Results: We observed statistically significant excesses of aircrew cancers for all sites, testis, and urinary bladder. All other aviator cancer classifications were not significantly different from the comparison cohort; most notably, cancers of the colon and rectum, skin (both malignant melanoma and non-epithelial), brain and nervous system, Hodgkin's Disease and leukemias. Conclusion: Previous studies of commercial pilots that demonstrated excesses of these cancers may have been biased by the use of external comparison groups. We used an internal comparison population to reduce selection bias, information bias and confounding. From these data we detected notable excess aircrew cancer risk for cancers of the testis, urinary bladder, and all sites combined. RP Grayson, JK (reprint author), USAF,BSC,OCCUPAT & ENVIRONM HLTH DIRECTORATE,ARMSTRONG LAB,AL-OEMO,2402 E DR,BROOKS AFB,TX 78235, USA. NR 14 TC 54 Z9 56 U1 0 U2 4 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD FEB PY 1996 VL 67 IS 2 BP 101 EP 104 PG 4 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TT661 UT WOS:A1996TT66100001 PM 8834932 ER PT J AU Previc, FH AF Previc, FH TI An automated bisection device for assessing attentional neglect in clinical populations SO BEHAVIOR RESEARCH METHODS INSTRUMENTS & COMPUTERS LA English DT Article ID ALTITUDINAL NEGLECT; LINE-BISECTION; DISEASE; ALZHEIMERS; HUMANS; SPACE AB An automated bisection device (ABD) is described that is designed for use in assessing the direction of three-dimensional neglect in various clinical populations. This device features an apparatus containing two base sections and a connecting rod, on which is located a bisection indicator assemblage that can be moved either by hand or by a calibrated motor-drive system. The indicator assemblage is, in turn, connected to a motor-control box with variable speed settings and a digital readout. The ABD can be used to measure bisection estimations along all three linear axes (lateral, vertical, and depth) by providing visual cues alone, tactile cues alone, or a combination of visual and tactile cues. RP Previc, FH (reprint author), AL,CFTF,2504 GILLINGHAM DR,STE 1,BROOKS AFB,TX 78235, USA. NR 15 TC 1 Z9 1 U1 0 U2 0 PU PSYCHONOMIC SOC INC PI AUSTIN PA 1710 FORTVIEW RD, AUSTIN, TX 78704 SN 0743-3808 J9 BEHAV RES METH INSTR JI Behav. Res. Methods Instr. Comput. PD FEB PY 1996 VL 28 IS 1 BP 83 EP 88 DI 10.3758/BF03203640 PG 6 WC Psychology, Mathematical; Psychology, Experimental SC Psychology GA TW726 UT WOS:A1996TW72600011 ER PT J AU Grissom, TE Bina, S Hart, J Muldoon, SM AF Grissom, TE Bina, S Hart, J Muldoon, SM TI Effect of halothane on phenylephrine-induced vascular smooth muscle contractions in endotoxin-exposed rat aortic rings SO CRITICAL CARE MEDICINE LA English DT Article DE smooth muscle; anesthetics; halothane; phenylephrine; endotoxin; lipopolysaccharides; septic shock; nitric oxide; critical illness; aorta ID NITRIC-OXIDE; L-ARGININE; ENDOTHELIUM; ISOFLURANE; SHOCK; INDUCTION; SEPSIS; CGMP AB Objectives: a) To determine the response of endotoxin-exposed vascular smooth muscle to exogenous vasoconstrictors during concomitant exposure to an inhaled anesthetic (halothane); and b) to determine if excess nitric oxide production is responsible for any altered response. Design: In vitro, prospective, repeated measures, dose-response study. Setting: University/medical school experimental physiology laboratory. Subjects: Adult male Sprague-Dawley rats, whose aortae were studied in an in vitro preparation. Interventions: Thoracic aortae were excised from anesthetized animals and cut into 3-mm rings. After incubation in aerated organ baths containing a modified essential medium with or without Escherichia coli lipopolysaccharide (100 mu g/mL) at 37 degrees C for 5 hrs, the rings were removed and suspended in separate baths for isometric tension recording. Phenylephrine dose-response data (10(-10) to 10(-5) M) were determined for lipopolysaccharide- and nonlipopolysaccharide-treated rings. After washout and equilibration, two vessels (one each lipopolysaccharide and non-lipopolysaccharide-treated) were additionally exposed to 2% halothane and phenylephrine dose-response determinations were repeated for all vessels. This procedure was repeated for 1% halothane in a separate experiment. In some experiments, the nitric oxide synthase inhibitor, N-w-nitro-L-arginine (3 x 10(-4) M), was added to the bath after the washout from the second phenylephrine dose-response determination. Then, a third phenylephrine dose response determination was performed, with and without 2% halothane. Measurements and Main Results: Dose-response curves were evaluated using a logistic regression analysis. In addition, absolute and percentage changes in tension were compared between the first and second contractions. Exposure to lipopolysaccharide resulted in a decrease in the maximum tension from 2.07 +/- 0.03 (controls) to 1.24 +/- 0.04 g/mg of vessel dry weight and an increase in the dose at which the contraction is 50% of maximum (ED(50)) from 3.78 x 10(-8) to 2.05 x 10(-7) M (P < .05). Exposure to 2% halothane produced significant reductions in the maximum tensions in both groups. The lipopolysaccharide treated vessels showed not only a proportionately larger decrease (-51 +/- 5% vs. -18 +/- 2% in the control plus halothane group), but also a significantly greater absolute decrease (0.59 +/- 0.09 vs. 0.34 +/- 0.04 g/mg in the control plus halothane group). The addition of 1% halothane produced less pronounced decreases in tension, with only an additive effect in the lipopolysaccharide-treated vessels. The addition of N-w-nitro-L-arginine resulted in a reversal of the lipopolysaccharide-induced decrease in tension. However, 2% halothane still had a significantly greater effect on the lipopolysaccharide exposed rings. Conclusions: Exposure of rat aortic rings to lipopolysaccharide in vitro decreased the contractile response to phenylephrine. The addition of 2% halothane resulted in a more than additive decrease in tension in the lipopolysaccharide treated vessels. Patients in septic or endotoxic shock are sensitive to most anesthetic regimens, and some of this sensitivity may be due to an altered vasoconstrictive response induced by lipopolysaccharide exposure. The inability of nitric oxide synthase inhibition to reverse this response completely suggests that induction of nitric oxide synthase and increased production of nitric oxide are not solely responsible for this finding. C1 UNIFORMED SERV UNIV HLTH SCI,DEPT ANESTHESIOL,BETHESDA,MD 20814. GEORGE MASON UNIV,DEPT BIOL,FAIRFAX,VA 22030. RP Grissom, TE (reprint author), WILFORD HALL USAF MED CTR,MED CTR,DEPT ANESTHESIOL,PSSA,LACKLAND AFB,TX 78236, USA. NR 24 TC 12 Z9 12 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0090-3493 J9 CRIT CARE MED JI Crit. Care Med. PD FEB PY 1996 VL 24 IS 2 BP 287 EP 293 DI 10.1097/00003246-199602000-00018 PG 7 WC Critical Care Medicine SC General & Internal Medicine GA TV442 UT WOS:A1996TV44200018 PM 8605803 ER PT J AU Knipp, DJ Emery, BA AF Knipp, DJ Emery, BA TI Polar cap contraction associated with the leading edge of a magnetic cloud SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID HIGH-LATITUDE IONOSPHERE; CONVECTION AB In the early hours of 14 January 1988 a large magnetic cloud passed the earth. In this brief article we show evidence of a sudden impulse associated with the leading edge of the main body of the magnetic cloud and we map the evolution of the convection patterns which are indicative of polar cap contraction associated with the subsequent, large, northward-directed interplanetary magnetic field. We provide a unique, step-by-step view of the high latitude events, simultaneously tracing both dayside and nightside responses to the solar wind variations. Our maps provide clear global-scale support for polar cap expansion/contraction theory. The final state of convection in the northern hemisphere was one of extreme quiescence with the suspension of both dayside and nightside reconnection and a near total loss of motional electric fields mapping into the ionosphere. We discuss how this state developed. C1 NATL CTR ATMOSPHER RES,HIGH ALTITUDE OBSERV,BOULDER,CO 80301. RP Knipp, DJ (reprint author), USAF ACAD,DEPT PHYS,COLORADO SPRINGS,CO 80840, USA. NR 7 TC 1 Z9 1 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD FEB 1 PY 1996 VL 23 IS 3 BP 305 EP 308 DI 10.1029/96GL00233 PG 4 WC Geosciences, Multidisciplinary SC Geology GA TU593 UT WOS:A1996TU59300025 ER PT J AU Hansen, RC Gammon, D AF Hansen, RC Gammon, D TI A Gibbsian model for finite scanned arrays SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION LA English DT Article AB A finite-by-infinite array of thin half-wave dipoles with H-plane scan is used to show the existence of a Gibbs' phenomenon-type standing wave in scan impedance (normalized by the infinite array value) over the elements of the array. The period of this wave is .5 lambda at broadside for lambda/2 array spacing and increases as the scan angle increases by a grating lobe-type expression. A simple empirical model based on Gibbs oscillations is fitted to the scan-impedance wave; the model predicts the 1/(1 - sin theta(0)) period variation, and should be useful for systems trades and for preliminary design purposes. C1 USAF,WASHINGTON,DC 20330. NR 9 TC 23 Z9 23 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-926X J9 IEEE T ANTENN PROPAG JI IEEE Trans. Antennas Propag. PD FEB PY 1996 VL 44 IS 2 BP 243 EP 248 DI 10.1109/8.481654 PG 6 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA TV808 UT WOS:A1996TV80800016 ER PT J AU Ganguly, BN Garscadden, A AF Ganguly, BN Garscadden, A TI Phase resolved two-dimensional emission pattern of a low-frequency helium discharge SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID OPTICAL-EMISSION; GLOW-DISCHARGES AB Time resolved two-dimensional (2-D) plasma-transition emission patterns of the 3(3)D to 2(3)P transition in a three-torr low-frequency helium discharge have been measured. The emission patterns are found to be asymmetric for complementary phases of the current at 30-KHz excitation frequency, however, they are symmetric for 200-KHz excitation frequency, The excitation of the 30-KHz discharge is similar to that of a de discharge with increasing and decreasing current. RP Ganguly, BN (reprint author), WRIGHT LAB, WRIGHT PATTERSON AFB, OH 45433 USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 0093-3813 J9 IEEE T PLASMA SCI JI IEEE Trans. Plasma Sci. PD FEB PY 1996 VL 24 IS 1 BP 115 EP 116 DI 10.1109/27.491739 PG 2 WC Physics, Fluids & Plasmas SC Physics GA UE718 UT WOS:A1996UE71800057 ER PT J AU Schwartz, Z Martin, JY Dean, DD Simpson, J Cochran, DL Boyan, BD AF Schwartz, Z Martin, JY Dean, DD Simpson, J Cochran, DL Boyan, BD TI Effect of titanium surface roughness on chondrocyte proliferation, matrix production, and differentiation depends on the state of cell maturation SO JOURNAL OF BIOMEDICAL MATERIALS RESEARCH LA English DT Article ID VITAMIN-D METABOLITES; GROWTH-FACTOR-BETA; RESTING ZONE; CONNECTIVE-TISSUE; BONE; INVITRO; IMPLANTS; 1,25-DIHYDROXYVITAMIN-D3; FIBRONECTIN; INTERFACE AB Although it is well accepted that implant success is dependent on various surface properties, little is known about the effect of surface roughness on cell metabolism or differentiation, or whether the effects vary with the maturational state of the cells interacting with the implant. In the current study, we examined the effect of titanium (Ti) surface roughness on chondrocyte proliferation, differentiation, and matrix synthesis using cells derived from known stages of endochondral development. Chondrocytes derived from the resting zone (RCs) and growth zone (GCs) of rat costochondral cartilage were cultured on Ti disks that were prepared as follows: HF-HNO3-treated and washed (PT); PT-treated and electropolished (EP); fine sand-blasted, HCl-H2SO4-etched, and washed (FA); coarse sand-blasted, HCl-H2SO4-etched, and washed (CA); or Ti plasma-sprayed (TPS). Based on surface analysis, the Ti surfaces were ranked from smoothest to roughest: EP, PT, FA, CA, and TPS. Cell proliferation was assessed by cell number and [H-3]-thymidine incorporation, and RNA synthesis was assessed by [H-3]-uridine incorporation. Differentiation was determined by alkaline phosphatase specific activity (ALPase). Matrix production was measured by [H-3]-proline incorporation into collagenase-digestible (CDP) and noncollagenase-digestible (NCP) protein and by [S-35]-sulfate incorporation into proteoglycan. GCs required two trypsinizations for complete removal from the culture disks; the number of cells released by the first trypsinization was generally decreased with increasing surface roughness while that released by the second trypsinization was increased. In RC cultures, cell number was similarly decreased on the rougher surfaces; only minimal numbers of RCs were released by a second trypsinization. [H-3]-thymidine incorporation by RCs decreased with increasing surface roughness while that by GCs was increased. [H-3]- Uridine incorporation by both GCs and RCs was greater on rough surfaces. Conversely, ALPase in the cell layer and isolated cells of both cell types was significantly decreased. GC CDP and NCP production was significantly decreased on rough surfaces while CDP production by RC cells was significantly decreased on smooth surfaces. [S-35]-sulfate incorporation by RCs and GCs was decreased on all surfaces compared to tissue culture plastic. The results of this study indicate that surface roughness affects chondrocyte proliferation, differentiation, and matrix synthesis, and that this regulation is cell maturation dependent. (C) 1996 John Wiley & Sons, Inc. C1 UNIV TEXAS,HLTH SCI CTR,DEPT ORTHOPAED,SAN ANTONIO,TX 78284. UNIV TEXAS,HLTH SCI CTR,DEPT PEDIAT,SAN ANTONIO,TX 78284. UNIV TEXAS,HLTH SCI CTR,DEPT BIOCHEM,SAN ANTONIO,TX 78284. HEBREW UNIV JERUSALEM,HADASSAH FAC DENT MED,DEPT PERIODONT,JERUSALEM,ISRAEL. WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236. INST STRAUMANN AG,WALDENBURG,SWITZERLAND. OI Dean, David/0000-0002-4512-9065 FU NIDCR NIH HHS [DE-05937, DE-08603] NR 57 TC 147 Z9 148 U1 2 U2 13 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0021-9304 J9 J BIOMED MATER RES JI J. Biomed. Mater. Res. PD FEB PY 1996 VL 30 IS 2 BP 145 EP 155 PG 11 WC Engineering, Biomedical; Materials Science, Biomaterials SC Engineering; Materials Science GA UD181 UT WOS:A1996UD18100004 PM 9019478 ER PT J AU Saad, RM Loubser, PG Rokey, R AF Saad, RM Loubser, PG Rokey, R TI Intraoperative transesophageal and contrast echocardiographic detection of an unusual complication associated with a misplaced pulmonary artery catheter SO JOURNAL OF CARDIOTHORACIC AND VASCULAR ANESTHESIA LA English DT Article DE echocardiography; complications; pulmonary artery catheter ID CENTRAL VENOUS CATHETERIZATION; ARTERIOVENOUS-FISTULA; RISKS C1 BAYLOR COLL MED,DEPT MED,CARDIOL SECT,HOUSTON,TX. BAYLOR COLL MED,DEPT MED,CARDIOVASC ANESTHESIOL SECT,HOUSTON,TX. BAYLOR COLL MED,DEPT ANESTHESIOL,HOUSTON,TX. RP Saad, RM (reprint author), USAF,MED CTR,ECHOCARDIOG LAB,DEPT CARDIOL PSMC,WILFORD HALL MED CTR,2200 BERQUIST DR,SUITE 1,SAN ANTONIO,TX 78236, USA. NR 19 TC 2 Z9 2 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 1053-0770 J9 J CARDIOTHOR VASC AN JI J. Cardiothorac. Vasc. Anesth. PD FEB PY 1996 VL 10 IS 2 BP 247 EP 250 DI 10.1016/S1053-0770(96)80247-3 PG 4 WC Anesthesiology; Cardiac & Cardiovascular Systems; Respiratory System; Peripheral Vascular Disease SC Anesthesiology; Cardiovascular System & Cardiology; Respiratory System GA TX806 UT WOS:A1996TX80600016 PM 8850407 ER PT J AU Kamhawi, HN Leclair, SR Chen, CLP AF Kamhawi, HN Leclair, SR Chen, CLP TI Feature sequencing in the rapid design system using a genetic algorithm SO JOURNAL OF INTELLIGENT MANUFACTURING LA English DT Article DE feature intersection; process design; process planning; feature sequencing; genetic algorithms AB This paper addresses the feature sequencing problem in the Rapid Design System (RDS). The RDS is a feature-based design system that integrates product design and process planning. An important issue in feature-based process planning for machined parts is the order in which material is removed to form the resultant part. The order, or sequence, is partially dependent on the geometric relationships between features. The sequence affects the safety, the time it takes to machine the part, and the quality of the finished part. The sequence of material removal depends on two types of relations between features: (1) intersections and (2) interfeature associations. Both types of relations compound the search for an 'optimal' sequence of material removal. Therefore, the research problem has been the discovery and development of a genetic algorithm (GA) that efficiently searches the solution space for all possible sequences and identifies the best sequences in terms of safety, time and quality. C1 WRIGHT STATE UNIV,DEPT COMP SCI & ENGN,DAYTON,OH 45435. RP Kamhawi, HN (reprint author), WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. RI Chen, C. L. Philip/O-2657-2016 OI Chen, C. L. Philip/0000-0001-5451-7230 NR 10 TC 17 Z9 17 U1 0 U2 1 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0956-5515 J9 J INTELL MANUF JI J. Intell. Manuf. PD FEB PY 1996 VL 7 IS 1 BP 55 EP 67 DI 10.1007/BF00114138 PG 13 WC Computer Science, Artificial Intelligence; Engineering, Manufacturing SC Computer Science; Engineering GA TW915 UT WOS:A1996TW91500005 ER PT J AU Cotlar, CAM Mueller, MCR Pettit, CJW Schmidt, MER Villar, HV AF Cotlar, CAM Mueller, MCR Pettit, CJW Schmidt, MER Villar, HV TI Trocar site seeding of inapparent gallbladder carcinoma during laparoscopic cholecystectomy SO JOURNAL OF LAPAROENDOSCOPIC SURGERY LA English DT Review ID TUMOR INOCULATION; DIAGNOSIS; SURGERY; CANCER; METASTASES; RESECTION; IMPROVE AB There are increasing reports of seeding of tumor at the trocar sites following laparoscopic cholecystectomy in patients with unexpected or inapparent gallbladder carcinoma. A patient is reported here whose primary tumor appeared controlled by surgery and radiation, but who died of the disease after developing implant metastases at three untreated trocar sites. The second case report illustrates the difficulty in identifying gallbladder cancer during laparoscopic cholecystectomy, and the importance of a diligent preoperative effort to establish the diagnosis. Current literature suggests that tumor implantation occurring during laparoscopic cholecystectomy for inapparent carcinoma adversely affects prognosis, and, until the effect of laparoscopy on the spread of this tumor is better understood and controlled, open operation should be performed when carcinoma of the gallbladder is suspected. When laparoscopic cholecystectomy is done for inapparent gallbladder cancer, surgical and adjuvant radiotherapy to the trocar sites appears to improve outcome in association with extended treatment to the gallbladder bed and adjacent areas. Recent reports suggest that progress in diagnostic, surgical, and adjuvant techniques could substantially improve survival in carcinoma of the gallbladder. C1 355TH MED GRP,DEPT SURG,DAVIS MONTHAN AFB,AZ. UNIV ARIZONA,HLTH SCI CTR,DEPT SURG & RADIAT ONCOL,TUCSON,AZ. NR 53 TC 14 Z9 14 U1 0 U2 1 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 1052-3901 J9 J LAPAROENDOSC SURG JI J. Laparoendosc. Surg. PD FEB PY 1996 VL 6 IS 1 BP 35 EP 45 PG 11 WC Surgery SC Surgery GA TW661 UT WOS:A1996TW66100006 ER PT J AU Posta, CG AF Posta, CG TI Blunt preperitoneal finger dissection during extraperitoneal laparoscopic inguinal hernia repair: An effective alternative to instrumental techniques SO JOURNAL OF LAPAROENDOSCOPIC SURGERY LA English DT Article AB Extraperitoneal laparoscopic inguinal hernia repair is a technically demanding procedure that nevertheless has significant advantages over the other types of laparoscopic inguinal hernia repairs. One of the difficulties inherent to the procedure is the establishment of an adequate working space between the abdominal wall and the peritoneum. A quick and efficient method is reported here that was used in 15 consecutive patients. The method provides wide exposure without the use of any sophisticated equipment or the need for a significant learning curve. Exposure of the preperitoneal space with the dissection technique described simplifies a difficult first step and makes the extraperitoneal repair an easier undertaking. C1 USAF HOSP,GEN SURG SERV,HILL AFB,UT. NR 15 TC 2 Z9 2 U1 0 U2 0 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 1052-3901 J9 J LAPAROENDOSC SURG JI J. Laparoendosc. Surg. PD FEB PY 1996 VL 6 IS 1 BP 47 EP 49 DI 10.1089/lps.1996.6.47 PG 3 WC Surgery SC Surgery GA TW661 UT WOS:A1996TW66100007 PM 8919177 ER PT J AU Claravall, L AF Claravall, L TI Healthcare violence - A nursing administration perspective SO JOURNAL OF NURSING ADMINISTRATION LA English DT Article C1 USAF,NURSE CORP,WASHINGTON,DC 20330. RP Claravall, L (reprint author), UNIV TEXAS,HLTH SCI CTR,SCH NURSING,7703 FLOYD CURL DR,SAN ANTONIO,TX, USA. NR 31 TC 3 Z9 3 U1 0 U2 1 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0002-0443 J9 J NURS ADMIN JI J. Nurs. Adm. PD FEB PY 1996 VL 26 IS 2 BP 41 EP 46 DI 10.1097/00005110-199602000-00014 PG 6 WC Nursing SC Nursing GA TU675 UT WOS:A1996TU67500014 PM 8601829 ER PT J AU Thiel, CP Evans, DB Burnett, RR AF Thiel, CP Evans, DB Burnett, RR TI Combination syndrome associated with a mandibular implant-supported overdenture: A clinical report SO JOURNAL OF PROSTHETIC DENTISTRY LA English DT Article ID MAXILLARY COMPLETE DENTURE; TRANSMANDIBULAR IMPLANT; PROSTHESES; RESORPTION C1 WILFORD HALL USAF MED CTR,SAN ANTONIO,TX 78236. NR 16 TC 18 Z9 18 U1 0 U2 2 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0022-3913 J9 J PROSTHET DENT JI J. Prosthet. Dent. PD FEB PY 1996 VL 75 IS 2 BP 107 EP 113 DI 10.1016/S0022-3913(96)90084-0 PG 7 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA TW155 UT WOS:A1996TW15500001 PM 8667265 ER PT J AU Higgs, JB Smith, D Rosier, KFD Charlesworth, RW AF Higgs, JB Smith, D Rosier, KFD Charlesworth, RW TI Quantitative measurement of erosion growth and joint space loss in rheumatoid arthritis hand radiographs SO JOURNAL OF RHEUMATOLOGY LA English DT Article DE rheumatoid arthritis; radiography; radiologic technology ID RADIOLOGIC PROGRESSION; METHOTREXATE THERAPY; DRUG-THERAPY; ABNORMALITIES; TRIAL; AURANOFIN; WRISTS AB Objective. To evaluate the performance of simple, inexpensive quantitative techniques for measuring erosion growth and joint space loss in serial hand radiographs of patients with rheumatoid arthritis (RA). Methods. Erosions were measured using a plastic overlay template of sample erosion sizes. Joint spaces were measured with a hand held measuring micrometer. In the first phase of testing, a spectrum of individual erosions and joint spaces was measured to determine intra and interobserver correlations and variability. In the 2nd phase, the tools were used to measure serial changes in RA hand radiographs. Observer correlations and the ability to discriminate serial changes were determined and compared to the scoring method of Sharp. Results. Measurements of individual erosion areas and joint spaces were highly reproducible. Intra and interobserver correlations were significant (p < 0.05) for serial erosion growth and joint space loss measurements, as well as changes in Sharp scores; Quantitative measurements correlated highly with the corresponding Sharp score changes. Of all measurements or scores recorded, quantitative joint space loss measurements were statistically superior in discriminating serial change in RA hand radiographs. Quantitatively measured joint space loss correlated well with both erosion growth measurements and serial change in total Sharp scores. Conclusion. Quantitative measurement of erosion growth and joint space loss is possible with simple inexpensive techniques. Further study is needed to confirm our data, which suggest that quantitative measurement of joint space narrowing may be the most useful discriminator of serial changes in RA hand radiographs. C1 UNIFORMED SERV UNIV HLTH SCI,DEPT MED,BETHESDA,MD 20814. WILFORD HALL USAF MED CTR,DEPT RHEUMATOL,LACKLAND AFB,TX. WILFORD HALL USAF MED CTR,DIV RADIOL,LACKLAND AFB,TX. NR 25 TC 13 Z9 13 U1 0 U2 1 PU J RHEUMATOL PUBL CO PI TORONTO PA 920 YONGE ST, SUITE 115, TORONTO ON M4W 3C7, CANADA SN 0315-162X J9 J RHEUMATOL JI J. Rheumatol. PD FEB PY 1996 VL 23 IS 2 BP 265 EP 272 PG 8 WC Rheumatology SC Rheumatology GA TU765 UT WOS:A1996TU76500014 PM 8882030 ER PT J AU HEIDLER, JT AF HEIDLER, JT TI TO THE MANNER BORN - THE LIFE OF GENERAL WALKER,WILLIAM,H.T. - BROWN,RK SO JOURNAL OF SOUTHERN HISTORY LA English DT Book Review RP HEIDLER, JT (reprint author), USAF ACAD,COLORADO SPRINGS,CO 80840, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU SOUTHERN HISTORICAL ASSN PI ATHENS PA UNIV GEORGIA HISTORY DEPT, ATHENS, GA 30602 SN 0022-4642 J9 J SOUTHERN HIST JI J. South. Hist. PD FEB PY 1996 VL 62 IS 1 BP 163 EP 164 DI 10.2307/2211254 PG 2 WC History SC History GA TW559 UT WOS:A1996TW55900051 ER PT J AU Schwartz, BF Auman, R Peretsman, SJ Moul, JW Deshon, GE Hernandez, J Rozanski, TA Thrasher, JB AF Schwartz, BF Auman, R Peretsman, SJ Moul, JW Deshon, GE Hernandez, J Rozanski, TA Thrasher, JB TI Prognostic value of BHCG and local tumor invasion in stage I seminoma of the testis SO JOURNAL OF SURGICAL ONCOLOGY LA English DT Article DE beta human chorionic gonadotropin; tumor markers; radiotherapy; testicular cancer ID HUMAN CHORIONIC-GONADOTROPIN; ALPHA-FETOPROTEIN; RADIATION-THERAPY; CELLS; HCG AB Approximately 10-15% of patients with stage I pure seminoma of the testis have an elevated preorchiectomy serum beta human chorionic gonadotropin level [1-4]. The prognostic significance of this elevation is unknown. We performed a multi-institutional retrospective review of 332 men with stage I pure seminoma of the testis and evaluated the prognostic significance of this elevation and the prognostic value of local invasion of the primary tumor. Twenty-five of 191 evaluable patients (13%) had elevated preorchiectomy beta human chorionic gonadotropin. All normalized postoperatively and are alive without evidence of disease with a median follow-up of 50 months (range 1-124 mo). Of 191 patients, 190 (99.5%) are alive and free of disease. One patient underwent salvage chemotherapy for a chest recurrence, and he is alive and free of disease at 72 months. We conclude that elevated preorchiectomy serum beta human chorionic gonadotropin level and local invasion of the primary tumor do not portend a poor prognosis in patients with clinical stage I pure seminoma of the testis. (C) 1996 Wiley-Liss, Inc. C1 PORTSMOUTH NAVAL HOSP,DEPT UROL,PORTSMOUTH,VA. WILFORD HALL USAF MED CTR,DEPT UROL,SAN ANTONIO,TX 78236. WALTER REED ARMY MED CTR,DEPT UROL,WASHINGTON,DC 20307. TRIPLER ARMY MED CTR,DEPT UROL,HONOLULU,HI 96859. BROOKE ARMY MED CTR,DEPT UROL,SAN ANTONIO,TX. RP Schwartz, BF (reprint author), MADIGAN ARMY MED CTR,DEPT UROL,TACOMA,WA 98431, USA. NR 11 TC 8 Z9 8 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0022-4790 J9 J SURG ONCOL JI J. Surg. Oncol. PD FEB PY 1996 VL 61 IS 2 BP 131 EP 133 DI 10.1002/(SICI)1096-9098(199602)61:2<131::AID-JSO7>3.0.CO;2-D PG 3 WC Oncology; Surgery SC Oncology; Surgery GA TV763 UT WOS:A1996TV76300007 PM 8606544 ER PT J AU Parthasarathy, TA Hay, RS Ruh, R AF Parthasarathy, TA Hay, RS Ruh, R TI High-temperature deformation of SiC-whisker-reinforced MgO-PSZ mullite composites SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID MECHANICAL-PROPERTIES; COMPRESSIVE CREEP; CERAMICS AB The effect of 33.5 vol% SIC whisker loading on high-temperature deformation of 1 wt% MgO-38.5 wt% zirconia-mullite composites was studied between 1300 degrees and 1400 degrees C. At strain rates of 10(-6) to 5 x 10(-4)/s the creep resistance of zirconia-mullite composites without SIC reinforcement was inferior to monolithic mullite of similar grain size, Analysis of the results suggested that the decreased creep resistance of mullite-zirconia composites compared to pure mullite could be at least partially explained by mechanical effects of the weaker zirconia phase, increased effective diffusivity of mullite by zirconia addition, and to the differences in mullite grain morphology, With SLC whisker reinforcement, the deformation rate at high stress was nearly the same as that of the unreinforced material, but at low stress the creep rates of the SiC-reinforced material were significantly lowered, The stress dependence of the creep rate of unreinforced material suggested that diffusional creep was the operative mechanism, while the reinforced material behaved as if a threshold stress for creep existed, The threshold stress could be rationalized based on a whisker network model. This was supported by data on other whisker-containing materials; however, the threshold stress had a temperature dependence that was orders of magnitude higher than the elastic constants, leaving the physical model incomplete, The effects of residual stresses and amorphous phases at whisker/matrix interfaces are invoked to help complete the physical model for creep threshold stress. C1 USAF,WRIGHT LAB MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. UNIVERSAL TECHNOL CORP,BEAVERCREEK,OH 45431. RP Parthasarathy, TA (reprint author), UNIVERSAL ENERGY SYST INC,DAYTON,OH 45432, USA. RI Parthasarathy, Triplicane/B-7146-2011 OI Parthasarathy, Triplicane/0000-0002-5449-9754 NR 30 TC 4 Z9 4 U1 0 U2 2 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD FEB PY 1996 VL 79 IS 2 BP 475 EP 483 DI 10.1111/j.1151-2916.1996.tb08147.x PG 9 WC Materials Science, Ceramics SC Materials Science GA TW371 UT WOS:A1996TW37100029 ER PT J AU Seay, TM Peretsman, SJ Dixon, PS AF Seay, TM Peretsman, SJ Dixon, PS TI Inhibition of human transitional cell carcinoma in vitro proliferation by fluoroquinolone antibiotics SO JOURNAL OF UROLOGY LA English DT Article DE carcinoma, transitional cell; bladder neoplasms; anti-infective agents; ciprofloxacin; ofloxacin ID SUPERFICIAL BLADDER-CANCER; PHARMACOKINETICS; CIPROFLOXACIN; COMPLICATIONS; VOLUNTEERS; OFLOXACIN; GROWTH AB Purpose: The in vitro effects of the fluoroquinolone antibiotics ciprofloxacin and ofloxacin upon 3 human transitional cell carcinoma cell lines were investigated at concentrations that are attainable in the urine of patients taking these drugs orally. Materials and Methods: Cell lines TCCSUP, T24, and J82 were exposed in culture to either ciprofloxacin or ofloxacin at concentrations ranging from 0 to 800 mu g./ml. and at durations ranging from 24 to 120 hours. Inhibition of proliferation and DNA synthesis were assessed via MTT and tritiated thymidine assays, respectively. Results: From the MTT assay ciprofloxacin, at concentrations of 25 to 800 mu g./ml. produced proliferation inhibition in the TCCSUP line ranging from 8.1% to 90.2% at 24 hours, 25.1% to 94.9% at 72 hours, and 53.8% to 96.9% at 120 hours. Inhibition of proliferation for the T24 line ranged from 8.0% to 85%, 31.5% to 96.5%, and 27.3% to 98.2%. Inhibition of proliferation of the J82 line ranged from 20.8% to 84.8%, 22.8% to 92.7%, and 37.4% to 97.1%. Inhibition of DNA synthesis (due to ciprofloxacin at the concentrations above) as measured by the tritiated thymidine assay was also significant for each of the 3 cell lines. Inhibition of proliferation and DNA synthesis due to ofloxacin was lower but not overall statistically different from that due to ciprofloxacin. In a separate experiment, enhanced cytotoxicity was observed at lower concentrations of ciprofloxacin when the initial media pH was approximated to 5.5. Conclusions: Ciprofloxacin and ofloxacin inhibit proliferation and DNA synthesis of these 3 human TCC lines in vitro. Inhibition occurred in a concentration- and time-dependent manner. The concentrations that were assessed are attainable in the urine of patients taking these agents orally. C1 WILFORD HALL USAF MED CTR,DEPT UROL,LACKLAND AFB,TX 78236. WILFORD HALL USAF MED CTR,DIRECTORATE CLIN INVEST,LACKLAND AFB,TX 78236. NR 23 TC 38 Z9 38 U1 0 U2 1 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0022-5347 J9 J UROLOGY JI J. Urol. PD FEB PY 1996 VL 155 IS 2 BP 757 EP 762 DI 10.1016/S0022-5347(01)66516-9 PG 6 WC Urology & Nephrology SC Urology & Nephrology GA TP493 UT WOS:A1996TP49300108 PM 8558720 ER PT J AU Chin, DL Gackstetter, GD Blackwood, GV AF Chin, DL Gackstetter, GD Blackwood, GV TI Ergometry as a predictor of basic military training success SO MILITARY MEDICINE LA English DT Article AB One hundred U.S. Air Force recruits were administered the cycle ergometry test to determine their aerobic fitness and timed on a 2-mile run before beginning the physical conditioning phase of training, The estimated oxygen consumption (vO(2)) was calculated for all trainees completing the ergometry test, The mean estimated vO(2) for those successfully completing basic military training (BMT) on schedule was 27.95 +/- 1.74 ml/kg/minute, whereas the mean estimated vO(2) for those not completing the program on schedule was 32.94 +/- 3.55 m/kg/minute (not statistically different), For the a-mile run, the times ranged from 14 minutes 17 seconds to 29 minutes 11 seconds, The mean run time for those completing BMT on schedule was 22 minutes 28.15 seconds +/- 25.79 seconds, compared to 21 minutes 19.46 seconds +/- 1 minute 26.30 seconds for those not completing the program on schedule (not statistically different). Neither relative risk nor chi-square calculations were statistically significant, No significant associations between run times or a passing cycle ergometry score at the beginning of BMT and successful completion of BMT were found. RP Chin, DL (reprint author), WILFORD HALL USAF MED CTR,DIV PREVENT MED,59 MDW-ISP,LACKLAND AFB,TX 78236, USA. NR 6 TC 5 Z9 5 U1 0 U2 0 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 SN 0026-4075 J9 MIL MED JI Milit. Med. PD FEB PY 1996 VL 161 IS 2 BP 75 EP 77 PG 3 WC Medicine, General & Internal SC General & Internal Medicine GA TU800 UT WOS:A1996TU80000008 PM 8857217 ER PT J AU Smith, WC Boyd, EM Parsons, DS AF Smith, WC Boyd, EM Parsons, DS TI Pediatric sphenoidotomy SO OTOLARYNGOLOGIC CLINICS OF NORTH AMERICA LA English DT Article ID SINUS SURGERY AB The posterior ethmoid air cells and the sphenoid sinuses have a complex anatomy that is surrounded by vital structures. To more easily protect these structures, three approaches are presented that make pediatric sphenoidotomy a safer procedure. The approaches include measuring the distance from the anterior nasal spine to the anterior and surgical posterior faces of the sphenoid sinus intraoperatively and comparing these to the patient's height and age, the use of the ''ridge'' to ensure a safe Entry into the sphenoid, and, in patients where isolated sphenoid disease is present, the use of a powered instrument to enlarge the sphenoid ostium. The availability of measurements relating the height of the patient to the location of the sphenoid sinus, the use of the ''ridge,'' and the use of powered instrumentation, should help the surgeon enter the sphenoid with greater confidence and achieve a more effective result. C1 WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236. UNIV MISSOURI,SCH MED,COLUMBIA,MO. NR 11 TC 6 Z9 6 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0030-6665 J9 OTOLARYNG CLIN N AM JI Otolaryngol. Clin. N. Am. PD FEB PY 1996 VL 29 IS 1 BP 159 EP & PG 10 WC Otorhinolaryngology SC Otorhinolaryngology GA TV071 UT WOS:A1996TV07100013 PM 8834279 ER PT J AU Varney, SM Demetroulakos, JL Fletcher, MH McQueen, WJ Hamilton, MK AF Varney, SM Demetroulakos, JL Fletcher, MH McQueen, WJ Hamilton, MK TI Palatal myoclonus: Treatment with Clostridium botulinum toxin injection SO OTOLARYNGOLOGY-HEAD AND NECK SURGERY LA English DT Article ID DISEASE C1 60TH MED GRP,DEPT GEN SURG,TRAVIS AFB,CA. 60TH MED GRP,DEPT OTOLARYNGOL,TRAVIS AFB,CA. 60TH MED GRP,DEPT NEUROL,TRAVIS AFB,CA. NR 14 TC 16 Z9 17 U1 0 U2 1 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0194-5998 J9 OTOLARYNG HEAD NECK JI Otolaryngol. Head Neck Surg. PD FEB PY 1996 VL 114 IS 2 BP 317 EP 320 DI 10.1016/S0194-5998(96)70194-8 PG 4 WC Otorhinolaryngology; Surgery SC Otorhinolaryngology; Surgery GA TX013 UT WOS:A1996TX01300033 PM 8637761 ER PT J AU Johnson, T Davis, TA Hadfield, SM AF Johnson, T Davis, TA Hadfield, SM TI A concurrent dynamic task graph SO PARALLEL COMPUTING LA English DT Article DE shared memory multiprocessors; task graph scheduling; multifrontal method; sparse matrices; Lu factorisation ID ALGORITHMS AB Task graphs are used for scheduling tasks on shared memory parallel processors when the tasks have dependencies. If the program's task graph is known ahead of time, then the tasks can be statically and optimally allocated to the processors. If the tasks and task dependencies are not known ahead of time (the case in some sparse matrix algorithms), then task scheduling must be performed dynamically. We present a simple algorithm for a concurrent dynamic-task graph. A processor that needs to execute a new task can query the task graph for a new task, and new tasks can be added to the task graph dynamically. C1 USAF,DEPT MATH SCI,COLORADO SPRINGS,CO. RP Johnson, T (reprint author), UNIV FLORIDA,DEPT COMP & INFORMAT SCI,GAINESVILLE,FL 32611, USA. RI Davis, Timothy/I-7248-2012 NR 16 TC 8 Z9 8 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-8191 J9 PARALLEL COMPUT JI Parallel Comput. PD FEB PY 1996 VL 22 IS 2 BP 327 EP 333 DI 10.1016/0167-8191(95)00061-5 PG 7 WC Computer Science, Theory & Methods SC Computer Science GA UF530 UT WOS:A1996UF53000007 ER PT J AU Belk, N Oates, DE Feld, DA Dresselhaus, G Dresselhaus, MS AF Belk, N Oates, DE Feld, DA Dresselhaus, G Dresselhaus, MS TI Frequency and temperature dependence of the microwave surface impedance of YBa2Cu3O7-delta thin films in a dc magnetic field: Investigation of vortex dynamics SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TC SUPERCONDUCTORS; II SUPERCONDUCTORS; FLUX CREEP; SINGLE-CRYSTALS; MIXED-STATE; DISSIPATION; PENETRATION; ANISOTROPY; CROSSOVER; LATTICE AB We report the results of a study of the complex microwave surface impedance Z(S) resulting from vortex motion in YBa2Cu3O7-delta thin films in a dc magnetic field applied parallel to the film c axis. Using the technique of stripline resonators we have measured Z(S) at frequencies from 1.2 to 22 GHz and at temperatures from 5 to 65 K in magnetic fields from 0 to 4 T. We find that both the surface resistance Rs and the surface reactance X(S) increase almost linearly with the magnetic field. In zero applied magnetic field we find the frequency dependence of the surface resistance to be f(2). In the mixed state, however, there is a significant increase in R(S), particularly at lower frequencies, causing R(S) to be approximately proportional to f(1.2) at all measured temperatures. We show that fits of these data to models which include only a single pinning energy and a single characteristic pinning frequency are not able to explain our results. We propose that these data indicate the existence of a large number of metastable bound vortex states separated by energy barriers U-b whose magnitudes extend from U-b similar to 0 K to several hundred K, and that the dominant part of R(S) arises from vortex transitions between these states. C1 MIT,LINCOLN LAB,LEXINGTON,MA 02173. USAF,ROME LAB,BEDFORD,MA 01731. MIT,FRANCIS BITTER NATL MAGNET LAB,CAMBRIDGE,MA 02139. MIT,DEPT ELECT ENGN & COMP SCI,CAMBRIDGE,MA 02139. MIT,DEPT PHYS,CAMBRIDGE,MA 02139. RP Belk, N (reprint author), MIT,DEPT PHYS,CAMBRIDGE,MA 02139, USA. NR 56 TC 55 Z9 56 U1 2 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD FEB 1 PY 1996 VL 53 IS 6 BP 3459 EP 3470 DI 10.1103/PhysRevB.53.3459 PG 12 WC Physics, Condensed Matter SC Physics GA TV645 UT WOS:A1996TV64500081 ER PT J AU Wiesel, WE AF Wiesel, WE TI Full stability-exponent placement in chaotic systems SO PHYSICAL REVIEW E LA English DT Article AB We present an algorithm to allow full placement of all stability exponents (Poincare or Lyapunov) in a controlled chaotic system. The linear quadratic regulator of classical control theory is recast to allow specification of the controlled system Lyapunov exponents and initial and final principal dynamical directions. In the process, a positive definite functional of the control is minimized. The boundary value problem that must be solved is linear, and converges in one iteration. Successful results are reported, applying the method to the Duffing oscillator, the Lorenz system, and the restricted problem of three bodies, for both periodic orbits and general trajectories. RP Wiesel, WE (reprint author), USAF,INST TECHNOL,ENY,2950 P ST,WRIGHT PATTERSON AFB,OH 45433, USA. NR 9 TC 1 Z9 1 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD FEB PY 1996 VL 53 IS 2 BP 1453 EP 1458 DI 10.1103/PhysRevE.53.1453 PG 6 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA TW979 UT WOS:A1996TW97900027 ER PT J AU Gambone, ML AF Gambone, ML TI SiC fiber strength after consolidation and heat-treatment in Ti-22Al-23Nb matrix composite SO SCRIPTA MATERIALIA LA English DT Article ID SILICON-CARBIDE; MICROSTRUCTURE; FILAMENTS RP Gambone, ML (reprint author), USAF,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 14 TC 12 Z9 13 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD FEB 1 PY 1996 VL 34 IS 3 BP 507 EP 512 DI 10.1016/0956-716X(95)00546-8 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA TT481 UT WOS:A1996TT48100025 ER PT J AU Merkel, KG Cerny, CLA Bright, VM Schuermeyer, FL Monahan, TP Lareau, RT Kaspi, R Rai, AK AF Merkel, KG Cerny, CLA Bright, VM Schuermeyer, FL Monahan, TP Lareau, RT Kaspi, R Rai, AK TI Improved p-channeL InAlAs/GaAsSb HIGFET using Ti/Pt/Au ohmic contacts to beryllium implanted GaAsSb SO SOLID-STATE ELECTRONICS LA English DT Review ID FIELD-EFFECT TRANSISTORS; HETEROSTRUCTURE FET; TEMPERATURE-DEPENDENCE; HIGH TRANSCONDUCTANCE; MICROSTRUCTURE; RESISTANCE AB Ti/Pt/Au is demonstrated as an ohmic contact which provides a thermally stable, low resistance, electrical interface to beryllium implanted GaAs1-xSbx on InP. Ohmic contacts are characterized electrically using the transmission line method. An extremely low contact resistance (rho(c) < 3 x 10(-7) Omega . cm(2)) is measured for thermal processing temperatures to T = 450 degrees C. The contact withstands an ambient temperature of T = 250 degrees C for up to 500 h. Microstructural characterization of the metal-semiconductor interface is achieved using Auger electron spectroscopy, X-ray diffraction and cross-sectional transmission electron microscopy. Contact sintering at T = 250 degrees C penetrates native oxides and minimizes contact resistance through formation of tunneling regions. Thermal degradation of the contact at T = 475 degrees C results from Au indiffusion and Ga and Sb outdiffusion with additional formation of Ga3Pt5 and TiAu phases. A single metallization of Ti/Pt/Au is employed for the source, drain and gate of the In0.52Al0.48As/GaAs0.51Sb0.49 p-channel heterostructure insulated-gate field effect transistor (HIGFET). Improvements are realized in the source/drain contact reliability, external transconductance, output conductance and cutoff characteristics of the In0.52Al0.48As/GaAs0.51Sb0.49 HIGFET compared with previous designs using alloyed Au/Zn/Au source/drain contacts. External transconductance of g(me) = 5.3 mS/mm and an output conductance of g(o) = 0.21 mS/mm are achieved on devices with gate length and width dimensions of L(G) = 1 mu m and W-G = 10 mu m, respectively. C1 WRIGHT LAB,SOLID STATE ELECTR DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433. USA,RES LAB,ELECTR & POWER SOURCES DIRECTORATE,FT MONMOUTH,NJ 07703. WRIGHT STATE UNIV,RES CTR,DAYTON,OH 45435. UNIVERSAL ENERGY SYST INC,DAYTON,OH 45432. RP Merkel, KG (reprint author), PHILLIPS LAB,VTEE,KIRTLAND AFB,NM 87117, USA. NR 35 TC 5 Z9 5 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1101 J9 SOLID STATE ELECTRON JI Solid-State Electron. PD FEB PY 1996 VL 39 IS 2 BP 179 EP 191 DI 10.1016/0038-1101(95)00154-9 PG 13 WC Engineering, Electrical & Electronic; Physics, Applied; Physics, Condensed Matter SC Engineering; Physics GA TR430 UT WOS:A1996TR43000001 ER PT J AU Murray, PT Chen, MY AF Murray, PT Chen, MY TI Formation of C3N4 clusters by laser ablation of nitrided graphite SO SURFACE REVIEW AND LETTERS LA English DT Article; Proceedings Paper CT 7th International Symposium on Small Particles and Inorganic Clusters (ISSPIC 7) CY SEP 12-16, 1994 CL KOBE, JAPAN SP Ciba Geigy Fdn Japan Promot Sci, Hyogo Prefecture, Japan Radioisotope Assoc, Kobe City, Nichigaku Mem Fdn Sci & Technol, Nippon Sheet Glass Fdn Mat Sci Engn, Nishina Mem Fdn, Osaka Sci & Technol Ctr, Res Fdn Electrotechnol Chubu, Terumo Life Sci Fdn, Commemorat Assoc Japan World Exposit 1970, Murata Sci Fdn, Assoc Tokyo Stock Exchange Regular Members, Fed Bankers Assoc Japan, Japan Automobile Manufacturers Assoc Inc, Japan Federat Construct Contractors, Japan Foreign Trade Council Inc, Petr Assoc Japan, Reg Banks Assoc Japan, Elect Wire & Cablea Makers Assoc, Federat Elect Power Co, Federat Pharm Manufacturers Assoc Japan, Japan Gas Assoc, Japan Iron & Steel Federat, Marine & Fire Insurance Assoc Japan Inc, Photo Sensitized Mat Manufacturers Ass;oc, Real Estate Co Assoc Japan, Trust Co Assoc Japan, Abu Takao, Asahi Glass Co Ltd, Canon Inc, CRC Res Inst Inc, Daihen Corp, Daiichi Pharm Co Ltd, Eisai Co Ltd, Extrel Mass Spectrometry, Fdk Corp, Fuji Elect Co Ltdq, Fujitsu Ltd, Hamamatsu Photon K K, Hitachi Ltd, Cent Res Lab, IBHM Japan Ltd, JASCO Corp, Kao Corp, Kinyosha Co Ltd, Kobe Steel Ltd, Matsushita Elect Ind Co Ltd, Matsushita Elect Works Ltd, Matsushita Res Inst Tokyo Inc, Mitsubishi Elect Corp, Cent Res Lab, Mitsuboshi Beltiang Ltd, NEC Corp, MicroElectr Res Lab, Nissei Sangyo Co Ltd, NTT Basic aRes Labs, Oki Elect Ind Co Ltd, Ono Pharm Co Ltd, Oxford Instruments Inc, Ricoh Co Ltd, Sankyo Co Ltd, Sanyo Elect Co Ltd, Seki Technotron Corp, Shionogi & Co Ltd, Spectra Phys K K, Springer Verlag, Stanley Elect Co Ltd, Tsukuba Res Lab, Sumitomo Pharm Co Ltd, Sumitomo Met Min Co Ltd, Taisho Pharm Co Ltd, Takeda Chem Ind Ltd, Tanabe Seiyaku Co Ltd, Kansai Elect Power Co Inc, Toppan Printing Co Ltd, Toray Res Ctr Inc, Toshiba Corp Res & Dev Ctr, Toyota Cent Res & Dev Lab Inc ID CARBON-NITRIDE; SOLIDS AB Clusters of C3N4 have been detected from laser ablation of nitrided graphite. The nitrided target was prepared by irradiating a graphite specimen with 248-nm laser radiation in the presence of N-2. Auger electron spectroscopy of the irradiated graphite indicated the formation of a thin layer with a composition of CN0.29. Ablation of this nitrided layer results in the ejection of carbon cluster as well as CN4 and C3N4. These results indicate that the C3N4 cluster ion is stable. They also suggest that laser ablation within the presence of a reactive gas may be a generally applicable method of preparing targets for the subsequent formation of unique cluster species. C1 WRIGHT LAB,MLBM,WRIGHT PATTERSON AFB,OH 45433. RP Murray, PT (reprint author), UNIV DAYTON,RES INST,DAYTON,OH 45469, USA. NR 11 TC 3 Z9 3 U1 0 U2 2 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0218-625X J9 SURF REV LETT JI Surf. Rev. Lett. PD FEB PY 1996 VL 3 IS 1 BP 197 EP 199 DI 10.1142/S0218625X96000395 PG 3 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA VH160 UT WOS:A1996VH16000039 ER PT J AU Gill, BD Jenkins, JR AF Gill, BD Jenkins, JR TI Cost-effective evaluation and management of the acute abdomen SO SURGICAL CLINICS OF NORTH AMERICA LA English DT Article ID APPENDICITIS AB Today, medicine is surging forward onto the information super highway with increasing focus on capitation, cost containment, critical pathways, and outcome analysis. In applying these principles to surgery, taking an ax to the trunk of the tree entitled ''the acute abdomen'' is not a cost-effective step for pruning the individual branches of varied abdominal pathologic conditions. An analysis of the common procedure of appendectomy may allow surgeons to acquire skills that will be necessary in the cost-effective management of patients with all varieties of acute abdominal pathologic conditions. RP Gill, BD (reprint author), USAF,DAVID GRANT MED CTR,DEPT SURG,SGOS,60TH MED GRP,101 BODIN CIRCLE,TRAVIS AFB,CA 94535, USA. NR 12 TC 12 Z9 12 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0039-6109 J9 SURG CLIN N AM JI Surg. Clin.-North Am. PD FEB PY 1996 VL 76 IS 1 BP 71 EP & DI 10.1016/S0039-6109(05)70423-0 PG 13 WC Surgery SC Surgery GA TV105 UT WOS:A1996TV10500008 PM 8629204 ER PT J AU Shandera, KC Rozanski, TA Jafers, G AF Shandera, KC Rozanski, TA Jafers, G TI The necessity of voiding cystourethrogram in the pretransplant urologic evaluation SO UROLOGY LA English DT Article AB Objectives, To determine the efficacy of limited use of voiding cystourethrogram (VCUG) in the evaluation of patients for renal transplantation. Methods. A retrospective review of 439 patients who underwent renal transplantation between October 1983 and May 1995; however, since September 1993 we used VCUC selectively in the pretransplant evaluation. Results. Since September 1993, only 51% of our renal transplant patients had a VCUC as part of their pretransplant evaluation, Only one urologic complication has occurred in a 68-year-old man with a history of glomerulonephritis, He had an episode of acute urinary retention, which was treated successfully with a temporary suprapubic tube followed by medical therapy. Conclusions. Our preliminary results reveal no adverse outcomes associated with the selective use of VCUC in the pretransplant evaluation, and indicate that this study is of little value in the routine evaluation of these patients. C1 BROOKE ARMY MED CTR,DEPT SURG,UROL SURG SERV,SAN ANTONIO,TX 78234. WILFORD HALL USAF MED CTR,DEPT TRANSPLANTAT SURG,SAN ANTONIO,TX 78236. NR 5 TC 9 Z9 9 U1 0 U2 0 PU CAHNERS PUBL CO PI NEW YORK PA 249 WEST 17 STREET, NEW YORK, NY 10011 SN 0090-4295 J9 UROLOGY JI UROLOGY PD FEB PY 1996 VL 47 IS 2 BP 198 EP 200 DI 10.1016/S0090-4295(99)80415-4 PG 3 WC Urology & Nephrology SC Urology & Nephrology GA TW787 UT WOS:A1996TW78700009 PM 8607233 ER PT J AU Bishoff, JT Peretsman, SJ Sabanegh, ES Lynch, SC AF Bishoff, JT Peretsman, SJ Sabanegh, ES Lynch, SC TI Dressing for surgical wounds of the penis SO UROLOGY LA English DT Article AB We describe a simple tubular elastic gauze dressing for surgical wounds of the penis, The amount of pressure placed on the penis is consistent and reproducible, The material is elastic enough to avoid vascular occlusion and is easily applied with a plastic tube. The dressing stays in place, can be used with stents or catheters, and is easily removed by the patients at home. RP Bishoff, JT (reprint author), WILFORD HALL USAF MED CTR,DEPT UROL,LACKLAND AFB,TX 78236, USA. NR 4 TC 0 Z9 0 U1 0 U2 1 PU CAHNERS PUBL CO PI NEW YORK PA 249 WEST 17 STREET, NEW YORK, NY 10011 SN 0090-4295 J9 UROLOGY JI UROLOGY PD FEB PY 1996 VL 47 IS 2 BP 250 EP 251 DI 10.1016/S0090-4295(99)80427-0 PG 2 WC Urology & Nephrology SC Urology & Nephrology GA TW787 UT WOS:A1996TW78700024 PM 8607245 ER PT J AU GlickmanWeiss, EL Hearon, CM Nelson, AG Kime, J AF GlickmanWeiss, EL Hearon, CM Nelson, AG Kime, J TI Relationship between thermoregulatory parameters and DEXA-estimated regional fat SO WILDERNESS & ENVIRONMENTAL MEDICINE LA English DT Article DE cold exposure; percent body fat; thermoregulation; rectal temperature; air temperature ID COLD-WATER; THERMAL RESPONSES; BODY-MASS; ABSORPTIOMETRY; MEN AB The present investigation utilized dual-energy X-ray absorptiometry (DEXA) as a means of assessing the relation between regional percent body fat and selected thermoregulatory variables. Tissue insulation (I), rectal temperature (T-re), mean skin temperature (<(T)over bar (sk)>), and regional distribution of fat (i.e., arm, leg, trunk, abdomen) were examined utilizing a sample of seven Caucasian males ((X) over bar +/- SE age = 23.7 +/- 1.9 years) who were exposed to 8 degrees C air for 120 min. The strongest relationships between I, <(T)over bar (sk)>, T-re, and the fatness variables were determined utilizing the all-possible regressions procedure. The strongest relationship existed between the combination of abdominal and leg adiposity and I (R(2) = 0.958, p < 0.05). The significant relationship between regional fat distribution and <(T)over bar (sk)> was described using the linear combination of trunk, abdominal, and arm fatness (R(2) = 0.979, p < .05). The strongest relationship for T-re used the combination of trunk, abdominal, and leg fatness (R(2) = 0.946, p > .05). Based on these data utilizing the DEXA, one may describe important relationships between thermoregulatory variables and distribution of percent fat. Also, abdominal fatness was repeatedly influential in describing relationships between body fatness and thermoregulatory variables. C1 ARMSTRONG LAB,CREW TECHNOL DIV,BROOKS AFB,TX 78235. LOUISIANA STATE UNIV,DEPT KINESIOL,BATON ROUGE,LA 70803. PENNINGTON BIOMED RES CTR,BATON ROUGE,LA 70808. RP GlickmanWeiss, EL (reprint author), KENT STATE UNIV,SCH EXERCISE LEISURE & SPORT,KENT,OH 44242, USA. NR 18 TC 1 Z9 1 U1 0 U2 1 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 1080-6032 J9 WILD ENVIRON MED JI Wildern. Environ. Med. PD FEB PY 1996 VL 7 IS 1 BP 19 EP 27 DI 10.1580/1080-6032(1996)007[0019:RBTPAD]2.3.CO;2 PG 9 WC Public, Environmental & Occupational Health; Sport Sciences SC Public, Environmental & Occupational Health; Sport Sciences GA VN067 UT WOS:A1996VN06700004 ER PT J AU Oates, DE Nguyen, PP Habib, Y Dresselhaus, G Dresselhaus, MS Koren, G Polturak, E AF Oates, DE Nguyen, PP Habib, Y Dresselhaus, G Dresselhaus, MS Koren, G Polturak, E TI Microwave power dependence of YBa2Cu3O7 thin-film Josephson edge junctions SO APPLIED PHYSICS LETTERS LA English DT Article AB Using a stripline resonator technique, we measured the dependence on microwave current of the impedance of fabricated superconductor/normal-metal/superconductor Josephson junctions in YBa2Cu3O7 thin films. The results are compared with predictions of a resistively shunted junction model that yields good agreement at low and intermediate values of the microwave current. At high currents deviations from the model predictions are observed, which we propose are due to flux penetration into the junction. The results are consistent with previously proposed explanations of the rf power dependence of the high-T-c materials. (C) 1996 American Institute of Physics. C1 MIT,DEPT PHYS,CAMBRIDGE,MA 02139. MIT,FRANCIS BITTER NATL MAGNET LAB,CAMBRIDGE,MA 02139. MIT,DEPT EECS,CAMBRIDGE,MA 02139. TECHNION ISRAEL INST TECHNOL,DEPT PHYS,IL-32000 HAIFA,ISRAEL. TECHNION ISRAEL INST TECHNOL,CROWN CTR SUPERCONDUCT,IL-32000 HAIFA,ISRAEL. USAF,ROME LAB,HANSCOM AFB,BEDFORD,MA 01731. RP Oates, DE (reprint author), MIT,LINCOLN LAB,244 WOOD ST,LEXINGTON,MA 02173, USA. NR 8 TC 32 Z9 32 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JAN 29 PY 1996 VL 68 IS 5 BP 705 EP 707 DI 10.1063/1.116598 PG 3 WC Physics, Applied SC Physics GA TR801 UT WOS:A1996TR80100044 ER PT J AU Love, GD AF Love, GD TI Binary adaptive optics: Atmospheric wave-front correction with a half-wave phase shifter (vol 34, pg 6058, 1995) SO APPLIED OPTICS LA English DT Correction, Addition C1 UNIV NEW MEXICO,DEPT PHYS & ASTRON,ALBUQUERQUE,NM 87131. RP Love, GD (reprint author), USAF,PHILLIPS LAB,LIMI,KIRTLAND AFB,NM 87117, USA. RI Love, Gordon/A-3071-2011 OI Love, Gordon/0000-0001-5137-9434 NR 1 TC 5 Z9 5 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD JAN 20 PY 1996 VL 35 IS 3 BP 347 EP 350 DI 10.1364/AO.35.000347 PG 4 WC Optics SC Optics GA TR972 UT WOS:A1996TR97200001 PM 21069017 ER PT J AU Hays, MD Hoyer, MH Glasow, PF AF Hays, MD Hoyer, MH Glasow, PF TI New forceps delivery technique for coil occlusion of patent ductus arteriosus SO AMERICAN JOURNAL OF CARDIOLOGY LA English DT Article C1 BROOKE ARMY MED CTR,PEDIAT CARDIOL SECT,FT SAM HOUSTON,TX 78234. WILFORD HALL USAF MED CTR,DEPT PEDIAT,PEDIAT CARDIOL SERV,SAN ANTONIO,TX 78236. NR 6 TC 35 Z9 37 U1 0 U2 0 PU EXCERPTA MEDICA INC PI NEW YORK PA 245 WEST 17TH STREET, NEW YORK, NY 10011 SN 0002-9149 J9 AM J CARDIOL JI Am. J. Cardiol. PD JAN 15 PY 1996 VL 77 IS 2 BP 209 EP 211 DI 10.1016/S0002-9149(96)90603-7 PG 3 WC Cardiac & Cardiovascular Systems SC Cardiovascular System & Cardiology GA TQ963 UT WOS:A1996TQ96300025 PM 8546098 ER PT J AU Zapol, P Pandey, R Ohmer, M Gale, J AF Zapol, P Pandey, R Ohmer, M Gale, J TI Atomistic calculations of defects in ZnGeP2 SO JOURNAL OF APPLIED PHYSICS LA English DT Article AB Atomistic calculations are performed to study defect energetics in ZnGeP2 where two- and three-body interatomic potentials are used to simulate the perfect lattice. Formation energies for native ionic defects and binding energies for some of the electronic defect complexes are calculated. The dominance of antisite defect pairs, Zn-Ge + Ge-Zn, is predicted in the lattice. However, the defects controlling the spectroscopic properties would seem to be associated with vacancies. For the EPR-active acceptor center, the hole is found to be localized near the zinc vacancy rather than near the zinc antisite (Zn-Ge). The calculated results suggest that the reported Hall effect and the photoluminescence data are compatible with the existence of two accepters in the lattice (in a three level model) where one is significantly shallower, experimentally by 0.27 eV, in reasonable agreement with the calculated difference of 0.37 eV. (C) 1996 American Institute of Physics. C1 WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,DEPT CHEM,LONDON SW7 2AY,ENGLAND. RP Zapol, P (reprint author), MICHIGAN TECHNOL UNIV,DEPT PHYS,HOUGHTON,MI 49931, USA. RI Zapol, Peter/G-1810-2012; Gale, Julian/B-7987-2009 OI Zapol, Peter/0000-0003-0570-9169; Gale, Julian/0000-0001-9587-9457 NR 33 TC 30 Z9 34 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 15 PY 1996 VL 79 IS 2 BP 671 EP 675 DI 10.1063/1.360811 PG 5 WC Physics, Applied SC Physics GA TQ775 UT WOS:A1996TQ77500017 ER PT J AU Merkel, KG Bright, VM Cerny, CLA Schuermeyer, FL Solomon, JS Kaspi, RA AF Merkel, KG Bright, VM Cerny, CLA Schuermeyer, FL Solomon, JS Kaspi, RA TI Beryllium ion implantation in GaAsSb epilayers on InP SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID MOLECULAR-BEAM EPITAXY; GALLIUM-ARSENIDE; GROWTH; ACTIVATION; GAAS0.5SB0.5; TEMPERATURE; DIFFUSION; DEVICE AB Beryllium ion implantation was used to form high acceptor concentrations in GaAs1-xSbx (0.47 less than or equal to x less than or equal to 0.49) epilayers on semi-insulating InP substrates. Two implant doses were tested: Q(0) = 5 x 10(14) cm(-2) and Q(0) = 1 x 10(15) cm(-2) at an implant energy of E = 50 keV. Electrochemical profiling and secondary-ion-mass spectrometry (SIMS) results confirm acceptor concentrations of N-A greater than or equal to 1 x 10(19) cm(-3) and N-A greater than or equal to 2 x 10(19) cm(-3) within 1000 Angstrom of the GaAs1-xSbx surface for the lower and higher implant dose, respectively. These results provide a p(+) surface layer for low-resistance ohmic contact to GaAsSb-based devices. Optical microscopy and SIMS demonstrate rapid thermal anneal (RTA) temperature limits of T = 650 degrees C for Q(0) = 5 x 10(14) cm(-2) and T = 600 degrees C for Q(0) = 1 x 10(15) cm(-2). The temperature limitation is imposed by destabilization of the GaAs1-xSbx surface through Ga sputtering during implantation, and Ga and As outdiffusion during RTA. (C) 1996 American Institute of Physics. C1 USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433. UNIV DAYTON,RES INST,DAYTON,OH 45469. WRIGHT LAB,SOLID STATE ELECTR DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. NR 40 TC 0 Z9 0 U1 1 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 15 PY 1996 VL 79 IS 2 BP 699 EP 709 DI 10.1063/1.360814 PG 11 WC Physics, Applied SC Physics GA TQ775 UT WOS:A1996TQ77500020 ER PT J AU Reynolds, DC Look, DC Jogai, B McCoy, GL Bajaj, KK AF Reynolds, DC Look, DC Jogai, B McCoy, GL Bajaj, KK TI Magnetophotoluminescence study of excited states associated with donor bound excitons in high-purity GaAs SO PHYSICAL REVIEW B LA English DT Article ID RESIDUAL DONORS; EPITAXIAL GAAS; IDENTIFICATION; SEMICONDUCTORS AB Detailed magnetic-field splitting of the two rotator states designated as (Gamma(6)+Gamma(8), J=5/2) and (Gamma(7), J=1/2) associated with donor bound excitons in high-purity epitaxial GaAs is observed in magnetophotoluminescence spectra. These two states are associated with the light-hole mass and are split by the spin-orbit interaction. The ordering in energy of these two states agrees with that predicted by theory. Also observed are the rotator states in which, after the radiative collapse of;the exciton, the donor is left in the excited states. A good agreement between the energies of the excited states of the donor as determined experimentally with those calculated using a variational approach is found. The magnetophotoluminescence spectra at relatively low magnetic fields clearly show the evolution of the excited donor bound exciton states as well as the excited rotator states. C1 USAF, WRIGHT LAB, ELR, SOLID STATE ELECTR DIRECTORATE, WRIGHT PATTERSON AFB, OH 45433 USA. EMORY UNIV, DEPT PHYS, ATLANTA, GA 30322 USA. RP WRIGHT STATE UNIV, RES CTR, DAYTON, OH 45434 USA. NR 11 TC 4 Z9 4 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD JAN 15 PY 1996 VL 53 IS 4 BP 1891 EP 1895 DI 10.1103/PhysRevB.53.1891 PG 5 WC Physics, Condensed Matter SC Physics GA TU730 UT WOS:A1996TU73000032 ER PT J AU Warrier, SG Gundel, DB Majumdar, BS Miracle, DB AF Warrier, SG Gundel, DB Majumdar, BS Miracle, DB TI Stress distribution in a transversely loaded cross-shaped single fiber SCS-6/Ti-6Al-4V composite SO SCRIPTA MATERIALIA LA English DT Article ID METAL-MATRIX COMPOSITES; PLASTICITY; DAMAGE C1 UES INC,DAYTON,OH. WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH. RP Warrier, SG (reprint author), SYSTRAN CORP,DAYTON,OH, USA. NR 19 TC 37 Z9 37 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD JAN 15 PY 1996 VL 34 IS 2 BP 293 EP 299 DI 10.1016/1359-6462(95)00499-8 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA TT067 UT WOS:A1996TT06700019 ER PT J AU Denoyer, KK Kwak, MK AF Denoyer, KK Kwak, MK TI Dynamic modelling and vibration suppression of a slewing structure utilizing piezoelectric sensors and actuators SO JOURNAL OF SOUND AND VIBRATION LA English DT Article AB This paper presents preliminary modelling and vibration suppression experiment results for the USAF Phillips Laboratory's Planar Articulating Controls Experiment (PACE) test bed. PACE is a two-link flexible multi-body experiment constrained to move over the surface of a large granite table. In this paper, an approximate analytical dynamic model of a single slewing flexible body with surface bonded piezoelectric sensors and actuators is developed using Hamilton's principle with discretization by the assumed mode method. After conversion to modal co-ordinates, damping is added to the model by including experimental damping measurements. The model is then converted to state-space form for the purpose of control design. The model is verified by comparison of simulated and experimental open loop frequency response data. Both decentralized and centralized controllers are designed for vibration suppression of a single arm of the PACE test bed. The controllers presented in this paper include: a positive position feedback (PPF) controller for controlling the first mode of vibration, a decentralized controller which uses three independent PPF filters for suppressing the first three modes of vibration, and a multiple-input, multiple-output (MIMO) linear quadratic Gaussian (LQG) design. The experiments include both analog and digital implementations of these controllers. Experimental open and closed loop time responses from slew tests are presented as well as open and closed loop frequency response data taken with the PACE arm in a cantilevered state. Significant vibration suppression is achieved using all three controller designs. (C) 1996 Academic Press Limited C1 UNIV NEW MEXICO,DEPT MECH ENGN,ALBUQUERQUE,NM 87131. RP Denoyer, KK (reprint author), USAF,PHILLIPS LAB AFMC,STRUCT & CONTROL DIV,KIRTLAND AFB,NM 87117, USA. NR 14 TC 44 Z9 45 U1 0 U2 9 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-460X J9 J SOUND VIB JI J. Sound Vibr. PD JAN 11 PY 1996 VL 189 IS 1 BP 13 EP 31 DI 10.1006/jsvi.1996.0003 PG 19 WC Acoustics; Engineering, Mechanical; Mechanics SC Acoustics; Engineering; Mechanics GA TQ561 UT WOS:A1996TQ56100002 ER PT J AU Pachter, M Kobylarz, T Houpis, CH AF Pachter, M Kobylarz, T Houpis, CH TI Literal Nyquist stability criterion for MIMO control systems SO INTERNATIONAL JOURNAL OF CONTROL LA English DT Article AB Nyquist stability criteria for multiple-input multiple output (MIMO) feedback systems are derived using a literal approach. In contrast to existing generalized Nyquist stability criteria, which involve the transfer function of the MIMO plant, the proposed literal approach allows the results to be expressed in terms of the poles and zeros of each of the elemental plants. Thus, explicit necessary and sufficient stability conditions for two-input and two-output and for three-input and three-output control systems are given. The results are illustrated in a flight control problem. RP Pachter, M (reprint author), USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,2950 P ST,WRIGHT PATTERSON AFB,OH 45433, USA. NR 6 TC 2 Z9 2 U1 0 U2 2 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0020-7179 J9 INT J CONTROL JI Int. J. Control PD JAN 10 PY 1996 VL 63 IS 1 BP 55 EP 65 DI 10.1080/00207179608921831 PG 11 WC Automation & Control Systems SC Automation & Control Systems GA TX387 UT WOS:A1996TX38700004 ER PT J AU Lee, SM Mather, PT Pearson, DS AF Lee, SM Mather, PT Pearson, DS TI Phase behavior and rheology of blends containing polycarbonate and a thermotropic polyester SO JOURNAL OF APPLIED POLYMER SCIENCE LA English DT Article ID LIQUID-CRYSTALLINE POLYMER; MORPHOLOGY; TEMPERATURE; VISCOSITY; COPOLYMER; SHEAR; TEREPHTHALATE; TRANSITIONS; DEPENDENCE; PET AB The phase behavior and rheology of binary blends of polycarbonate (PC) and a liquid crystalline polymer (LCP) have been investigated. The thermotropic LCP employed was a semiflexible polyester synthesized by melt condensation of t-butylhydroquinone and 4,4'-dichloroformyl-alpha,omega-diphenoxyhexane. It shows a distinct nematic-to-isotropic transition in the pure state and in the blends. Results of DSC and optical microscopy indicate that the LCP is solubilized in the mixture for weight fractions of LCP less than about 0.05 and shows partial miscibility with PC over the rest of the composition range. The phase separation is considered to be driven by both isotropic and anisotropic interactions between constituent chains. Dynamic oscillatory measurements show that there is some interaction between the separate isotropic and anisotropic phases, with complex viscosities of the blends being intermediate between those of pure components and showing significant deviation from a logarithmic rule-of-mixtures. (C) 1996 John Wiley & Sons, Inc. C1 USAF, PHILLIPS LAB, DIV FUNDAMENTAL TECHNOL, OLAC, RKFE, EDWARDS AFB, CA 93524 USA. UNIV CALIF SANTA BARBARA, MAT RES LAB, SANTA BARBARA, CA 93106 USA. UNIV CALIF SANTA BARBARA, DEPT MAT, SANTA BARBARA, CA 93106 USA. NR 33 TC 5 Z9 5 U1 1 U2 2 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0021-8995 J9 J APPL POLYM SCI JI J. Appl. Polym. Sci. PD JAN 10 PY 1996 VL 59 IS 2 BP 243 EP 250 PG 8 WC Polymer Science SC Polymer Science GA TK621 UT WOS:A1996TK62100008 ER PT J AU Wang, ZQ Day, P Pachter, R AF Wang, ZQ Day, P Pachter, R TI Ab initio study of C-20 isomers: Geometry and vibrational frequencies SO CHEMICAL PHYSICS LETTERS LA English DT Article ID POLYATOMIC-MOLECULES; DENSITY AB Geometry optimizations are performed for three isomers of C-20, namely the ring, bowl (corannulene-like), and cage (fullerene-like) configurations, using both the local density functional approximation (LDA), and gradient-corrected density functional theory (BLYP). The BLYP results confirm the previous single point calculation based on Hartree-Fock geometries, which is in favor of the ring geometry, while the LDA results still indicate a reversed order of energy, thus favoring the cage geometry. Our calculated LDA vibrational spectra of the ring geometry show significant differences with those of I-IF in the widths of two band gaps. In addition, our Moller-Plesset second-order perturbation theory (MP2) single point calculations using GAMESS show preference towards the bowl structure, which differs from previous similar calculations. RP Wang, ZQ (reprint author), USAF,WRIGHT LAB,MLPJ,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 19 TC 50 Z9 51 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD JAN 5 PY 1996 VL 248 IS 1-2 BP 121 EP 126 DI 10.1016/0009-2614(95)01299-0 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TN655 UT WOS:A1996TN65500020 ER PT J AU Blackwell, K Heckman, BE AF Blackwell, K Heckman, BE GP AMER METEOROL SOC TI Integration of interactive multimedia into the curriculum of the United States Air Force meteorology track: A two year assessment SO 12TH INTERNATIONAL CONFERENCE ON INTERACTIVE INFORMATION AND PROCESSING SYSTEMS (IIPS) FOR METEOROLOGY, OCEANOGRAPHY, AND HYDROLOGY: JOINT SESSION WITH FIFTH SYMPOSIUM ON EDUCATION LA English DT Proceedings Paper CT 12th International Conference on Interactive Information and Processing Systems for Meteorology, Oceanography, and Hydrology/5th Symposium on Education CY JAN 28-FEB 02, 1996 CL ATLANTA, GA SP Amer Meteorol Soc C1 USAF ACAD,DEPT ECON & GEOG,COLORADO SPRINGS,CO 80840. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1996 BP J13 EP J16 PG 4 WC Computer Science, Interdisciplinary Applications; Meteorology & Atmospheric Sciences; Remote Sensing SC Computer Science; Meteorology & Atmospheric Sciences; Remote Sensing GA BF41N UT WOS:A1996BF41N00130 ER PT B AU Littlejohn, K Olis, M Lentz, R Barnett, M AF Littlejohn, K Olis, M Lentz, R Barnett, M GP AIAA/IEEE TI Developing a design complexity measure SO 15TH DASC - AIAA/IEEE DIGITAL AVIONICS SYSTEMS CONFERENCE LA English DT Proceedings Paper CT 15th AIAA/IEEE Digital Avionics Systems Conference (15th DASC) CY OCT 27-31, 1996 CL ATLANTA, GA SP AIAA, IEEE AB The cost to develop and maintain software is increasing at a rapid rate. The majority of the total cost to develop software is spent in the post-deployment/maintenance phase of the software life-cycle. In order to reduce lifecycle costs, more effort needs to be spent in earlier phases of the software life-cycle. One characteristic that merits investigation is the complexity of a software design. Project performance metrics (i.e. effort, schedule, defect density, etc.) are driven by software complexity, and affect project costs. The Software Design Complexity Measure examines an organization's historical project performance metrics along with the complexity of a project's software design to estimate future project performance metrics. These estimates indicate costs that the evaluated software design will incur in the future, Equipped with future cost estimates, a project manager will be able to make more informed decisions concerning the future of the project. RP Littlejohn, K (reprint author), USAF,WRIGHT LAB,2241 AVION CIRCLE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3386-1 PY 1996 BP 31 EP 36 DI 10.1109/DASC.1996.559130 PG 6 WC Engineering, Aerospace SC Engineering GA BG78Z UT WOS:A1996BG78Z00005 ER PT B AU HamiltonJones, ML Littlejohn, K Pitarys, M AF HamiltonJones, ML Littlejohn, K Pitarys, M GP AIAA/IEEE TI Software technology for next-generation Strike Fighter avionics SO 15TH DASC - AIAA/IEEE DIGITAL AVIONICS SYSTEMS CONFERENCE LA English DT Proceedings Paper CT 15th AIAA/IEEE Digital Avionics Systems Conference (15th DASC) CY OCT 27-31, 1996 CL ATLANTA, GA SP AIAA, IEEE AB The mission of the Joint Strike Fighter (JSF) Program is ''to facilitate evolution of fully developed and validated operational requirements, proven operational concepts, and mature demonstrated technologies to support successful development and production of next-generation strike weapon systems for the U.S. Air Force (USAF), Navy (USN), Marine Corps (USMC), and our allies''[1]. Commensurate with its mission, the JSF Program endeavors to reduce the cost of developing strike fighter software by maturing and demonstrating software technology, standards, and processes. Several critical technology areas have been identified. The areas are Programming Languages, Secure Real-Time Operating Systems, Software Engineering Environments, and Software Architectures. In each of these areas, technologies have been identified to accomplish the overall goal of affordable software for next-generation strike fighter avionics. During FY95, the JSF Program sponsored demonstrations as part of the JSF Risk Reduction Studies/Demonstrations (RRSD) phase. Throughout this phase, emphasis has been placed on leveraging accomplishments made from several sources including the Defense Advanced Research Projects Agency (DARPA), and USAF and USN scientific and technical efforts. The corresponding technology demonstrations featured Ada 95, Portable Operating System Interface (POSIX) standards, software fault-tolerance, and several technologies demonstrated under DARPA-sponsored Domain Specific Software Architectures (DSSA) program. This paper describes the accomplishments made to date by the JSF Program, and includes future plans. RP HamiltonJones, ML (reprint author), USAF,JOINT STRIKE FIGHTER PROGRAM,WASHINGTON,DC 20330, USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3386-1 PY 1996 BP 37 EP 42 DI 10.1109/DASC.1996.559131 PG 6 WC Engineering, Aerospace SC Engineering GA BG78Z UT WOS:A1996BG78Z00006 ER PT B AU Lyke, JC Merkel, KG AF Lyke, JC Merkel, KG GP AIAA/IEEE TI Survey and taxonomy of three-dimensional packaging approaches SO 15TH DASC - AIAA/IEEE DIGITAL AVIONICS SYSTEMS CONFERENCE LA English DT Proceedings Paper CT 15th AIAA/IEEE Digital Avionics Systems Conference (15th DASC) CY OCT 27-31, 1996 CL ATLANTA, GA SP AIAA, IEEE AB This paper presents a survey of the field of 3-D packaging and suggests a taxonomy based on observations of an active research held and direct experience in the development of dimensionally-constrained electronics system packaging concepts. Of chief interest is the (1) identification of the attributes of 3-D approaches and quantitative performance metrics; (2) packaging medium and facilitation (e.g. thermal, mechanical, and electrical access) requirements; and the manifestation of certain regimes in 3-D packaging (e.g., ''few-layers'' vs ''many-layers''). The development of the taxonomy is further motivated by the discussion of 3-D heterogeneous packaging approaches as an ideal framework for packaging and interconnecting complex mixtures of analog, digital, sensor, microwave, and power management functional elements. RP Lyke, JC (reprint author), USAF,PHILLIPS LAB,VTEE,3550 ABERDEEN AVE SE,KIRTLAND AFB,NM 87117, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3386-1 PY 1996 BP 139 EP 144 DI 10.1109/DASC.1996.559147 PG 6 WC Engineering, Aerospace SC Engineering GA BG78Z UT WOS:A1996BG78Z00020 ER PT B AU Lyke, JC AF Lyke, JC GP AIAA/IEEE TI Design of a power-optimized micro miniature advanced instrument controller for sensor craft applications SO 15TH DASC - AIAA/IEEE DIGITAL AVIONICS SYSTEMS CONFERENCE LA English DT Proceedings Paper CT 15th AIAA/IEEE Digital Avionics Systems Conference (15th DASC) CY OCT 27-31, 1996 CL ATLANTA, GA SP AIAA, IEEE AB A highly-functional self-contained sensor data acquisition and processing system is under development for a probe designed to penetrate the surface of Mars. The processing system, based on an 8051 controller, is about the size of a postage stamp, weighs three grams, and consumes 50mW in nominal operation. It is designed to operate in space under 15,000G impacts and down to -120 degrees C temperatures. Though small, its 32 analog inputs, six serial ports, 32 digital interface lines, eight analog outputs, and in-situ reprogrammability make this device attractive for direct application in many aerospace systems. RP Lyke, JC (reprint author), USAF,PHILLIPS LAB,VTEE,3550 ABERDEEN AVE SE,KIRTLAND AFB,NM 87117, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3386-1 PY 1996 BP 145 EP 150 DI 10.1109/DASC.1996.559148 PG 6 WC Engineering, Aerospace SC Engineering GA BG78Z UT WOS:A1996BG78Z00021 ER PT B AU Lott, JA Shin, HK Lee, YH AF Lott, JA Shin, HK Lee, YH GP IEEE TI Deep red vertical cavity surface emitting lasers with monolithically integrated heterojunction phototransistors for output power control SO 15TH IEEE INTERNATIONAL SEMICONDUCTOR LASER CONFERENCE - CONFERENCE DIGEST LA English DT Proceedings Paper CT 15th IEEE International Semiconductor Laser Conference (HAIFA 1996 ISLC) CY OCT 13-18, 1996 CL HAIFA, ISRAEL SP IEEE, Lasers & Electro Opt Soc, S Neaman Inst, ECI Telecom, Semiconductor Devices, Technion, Israel Inst Technol, Israeli Minist Sci & Arts C1 USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 3 Z9 3 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3163-X PY 1996 BP 185 EP 186 DI 10.1109/ISLC.1996.558847 PG 2 WC Engineering, Electrical & Electronic; Optics SC Engineering; Optics GA BG45C UT WOS:A1996BG45C00088 ER PT B AU Roh, WB Hengst, GT AF Roh, WB Hengst, GT BE Chang, JS Lee, JH Lee, SY Nam, CH TI Reflection-grating photorefractive double phase-conjugate mirror SO 17TH CONGRESS OF THE INTERNATIONAL COMMISSION FOR OPTICS: OPTICS FOR SCIENCE AND NEW TECHNOLOGY, PTS 1 AND 2 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 17th Congress of the International-Commission-for-Optics - Optics for Science and New Technology CY AUG 19-23, 1996 CL TAEJON, SOUTH KOREA SP Int Commiss Opt, Soc Photo Opt Instrumentat Engineers C1 USAF,INST TECHNOL,DEPT ENGN PHYS,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2164-2 J9 P SOC PHOTO-OPT INS PY 1996 VL 2778 BP 909 EP 910 PG 2 WC Optics SC Optics GA BG45E UT WOS:A1996BG45E00443 ER PT B AU Ha, JC AF Ha, JC BE Chang, JS Lee, JH Lee, SY Nam, CH TI Fiber optic rate gyroscopes SO 17TH CONGRESS OF THE INTERNATIONAL COMMISSION FOR OPTICS: OPTICS FOR SCIENCE AND NEW TECHNOLOGY, PTS 1 AND 2 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 17th Congress of the International-Commission-for-Optics - Optics for Science and New Technology CY AUG 19-23, 1996 CL TAEJON, SOUTH KOREA SP Int Commiss Opt, Soc Photo Opt Instrumentat Engineers DE fiber optic; gyro; miniaturized; rate C1 USAF,AV LAB,AACN,WL,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2164-2 J9 P SOC PHOTO-OPT INS PY 1996 VL 2778 BP 1168 EP 1169 PG 2 WC Optics SC Optics GA BG45E UT WOS:A1996BG45E00570 ER PT J AU Miller, MW Smith, KF Knowles, JB Rugg, SA Brooks, GR Doran, JA AF Miller, MW Smith, KF Knowles, JB Rugg, SA Brooks, GR Doran, JA GP AMER METEOROL SOC TI The role of workstation-based visualizations in improving the severe thunderstorm forecasting process for forecasts issued by the air force global weather central (AFGWC) SO 18TH CONFERENCE ON SEVERE LOCAL STORMS LA English DT Proceedings Paper CT 18th Conference on Severe Local Storms CY FEB 19-23, 1996 CL SAN FRANCISCO, CA SP Amer Meteorol Soc RP Miller, MW (reprint author), USAF,AFGWC,DOA,106 PEACEKEEPER DR,SUITE 2N3,OFFUTT AFB,NE 68113, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1996 BP 260 EP 263 PG 4 WC Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Telecommunications SC Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Telecommunications GA BH11J UT WOS:A1996BH11J00058 ER PT B AU Hoium, DK Riordan, AJ Keeter, KK AF Hoium, DK Riordan, AJ Keeter, KK GP AMER METEOROL SOC TI Collaboration between the National Weather Service and NC State University in the severe-weather warning process in Raleigh, North Carolina SO 18TH CONFERENCE ON SEVERE LOCAL STORMS LA English DT Proceedings Paper CT 18th Conference on Severe Local Storms CY FEB 19-23, 1996 CL SAN FRANCISCO, CA SP Amer Meteorol Soc RP Hoium, DK (reprint author), N CAROLINA STATE UNIV,USAF,DEPT MEAS,RALEIGH,NC 27695, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1996 BP 264 EP 267 PG 4 WC Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Telecommunications SC Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Telecommunications GA BH11J UT WOS:A1996BH11J00059 ER PT J AU Waranauskas, BR Riordan, AJ AF Waranauskas, BR Riordan, AJ GP AMER METEOROL SOC TI Multi-scale analysis of a severe convective regeneration event SO 18TH CONFERENCE ON SEVERE LOCAL STORMS LA English DT Proceedings Paper CT 18th Conference on Severe Local Storms CY FEB 19-23, 1996 CL SAN FRANCISCO, CA SP Amer Meteorol Soc RP Waranauskas, BR (reprint author), DOWR,ACC,HQ,205 DODD BLVD STE 101,LANGLEY AFB,VA 23665, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1996 BP 642 EP 645 PG 4 WC Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Telecommunications SC Instruments & Instrumentation; Meteorology & Atmospheric Sciences; Telecommunications GA BH11J UT WOS:A1996BH11J00144 ER PT B AU Pitarys, MJ AF Pitarys, MJ GP ERA TECHNOL LTD TI Avionics software - From military standards to commercial standards SO 1995 AVIONICS CONFERENCE AND EXHIBITION - LOW-COST AVIONICS: CAN WE AFFORD IT?, CONFERENCE PROCEEDINGS SE ERA REPORT LA English DT Proceedings Paper CT 1995 Avionics Conference and Exhibition - Low-Cost Avionics: Can We Afford it CY NOV 29-30, 1995 CL LONDON, ENGLAND SP ERA Technol Ltd C1 USAF,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 1 U2 2 PU ERA TECHNOLOGY LTD PI LEATHERHEAD PA CLEEVE ROAD, LEATHERHEAD, SURREY, ENGLAND KT22 7SA BN 0-7008-0592-3 J9 ERA REP PY 1996 VL 95 IS 364 BP 31 EP & PG 7 WC Engineering, Aerospace SC Engineering GA BF46F UT WOS:A1996BF46F00003 ER PT S AU Micheel, LJ Hartnagel, HL AF Micheel, LJ Hartnagel, HL GP IEEE COMP SOC TI Interband RTDs with nanoelectronic HBT-LED structures for multiple-valued computation SO 1996 26TH INTERNATIONAL SYMPOSIUM ON MULTIPLE-VALUED LOGIC, PROCEEDINGS SE INTERNATIONAL SYMP ON MULTIPLE-VALUED LOGIC - PROCEEDINGS LA English DT Proceedings Paper CT 26th International Symposium on Multiple-Valued Logic CY MAY 29-31, 1996 CL SANTIAGO COMPOSTE, SPAIN SP IEEE, Comp Soc, Tech Comm Multiple Value Log, Univ Santiago Compostela, IEEE, Comp Soc C1 USAF,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 2 Z9 2 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 0195-623X BN 0-8186-7392-3 J9 INT SYM MVL PY 1996 BP 80 EP 85 DI 10.1109/ISMVL.1996.508340 PG 6 WC Computer Science, Theory & Methods; Mathematics, Applied SC Computer Science; Mathematics GA BF78S UT WOS:A1996BF78S00013 ER PT B AU Vaccaro, K Spaziani, SM Dauplaise, HM Berger, PR Davis, A Tsacoyeanes, CW Martin, EA Lorenzo, JP AF Vaccaro, K Spaziani, SM Dauplaise, HM Berger, PR Davis, A Tsacoyeanes, CW Martin, EA Lorenzo, JP GP IEEE TI Inverted, substrate-removed MSM and schottky diode optical detectors SO 1996 EIGHTH INTERNATIONAL CONFERENCE ON INDIUM PHOSPHIDE AND RELATED MATERIALS LA English DT Proceedings Paper CT 8th International Conference on Indium Phosphide and Related Materials CY APR 21-25, 1996 CL SCHWABISCH GMUND, GERMANY SP Verband Deut Elektrotechniker, Informat Technol Gesell, IEEE, Lasers & Electro Opt Soc, IEEE, Electron Devices Soc, AIXTRON, Alcatel, Bosch Telecom, Daimler Benz, EOARD, Epichem, Siemens, STS, Thomas Swan, European Commiss DG XIII C1 USAF,ROME LAB,ELECTROMAGNET & RELIABIL DIRECTORATE,OPTOELECTR COMPONENTS BRANCH,BEDFORD,MA 01731. RI Berger, Paul/I-4063-2014 OI Berger, Paul/0000-0002-2656-2349 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3284-9 PY 1996 BP 226 EP 229 PG 4 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Optics SC Engineering; Materials Science; Optics GA BF52F UT WOS:A1996BF52F00060 ER PT B AU Stadler, BJ Lorenzo, JP Bliss, DF AF Stadler, BJ Lorenzo, JP Bliss, DF GP IEEE TI Investigations of the Faraday effect in Fe-doped InP SO 1996 EIGHTH INTERNATIONAL CONFERENCE ON INDIUM PHOSPHIDE AND RELATED MATERIALS LA English DT Proceedings Paper CT 8th International Conference on Indium Phosphide and Related Materials CY APR 21-25, 1996 CL SCHWABISCH GMUND, GERMANY SP Verband Deut Elektrotechniker, Informat Technol Gesell, IEEE, Lasers & Electro Opt Soc, IEEE, Electron Devices Soc, AIXTRON, Alcatel, Bosch Telecom, Daimler Benz, EOARD, Epichem, Siemens, STS, Thomas Swan, European Commiss DG XIII C1 USAF,PHOTON DEVICE TECHNOL DIV,ROME LAB,BEDFORD,MA 01731. NR 0 TC 0 Z9 0 U1 0 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3284-9 PY 1996 BP 569 EP 571 PG 3 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Optics SC Engineering; Materials Science; Optics GA BF52F UT WOS:A1996BF52F00151 ER PT B AU Vaccaro, K Davis, A Dauplaise, HM Lorenzo, JP AF Vaccaro, K Davis, A Dauplaise, HM Lorenzo, JP GP IEEE TI InP-based misfets using CdS passivation SO 1996 EIGHTH INTERNATIONAL CONFERENCE ON INDIUM PHOSPHIDE AND RELATED MATERIALS LA English DT Proceedings Paper CT 8th International Conference on Indium Phosphide and Related Materials CY APR 21-25, 1996 CL SCHWABISCH GMUND, GERMANY SP Verband Deut Elektrotechniker, Informat Technol Gesell, IEEE, Lasers & Electro Opt Soc, IEEE, Electron Devices Soc, AIXTRON, Alcatel, Bosch Telecom, Daimler Benz, EOARD, Epichem, Siemens, STS, Thomas Swan, European Commiss DG XIII C1 USAF,ROME LAB,ELECTROMAGNET & RELIABIL DIRECTORATE,OPT COMPONENTS BRANCH,BEDFORD,MA 01731. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3284-9 PY 1996 BP 693 EP 696 PG 4 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Optics SC Engineering; Materials Science; Optics GA BF52F UT WOS:A1996BF52F00184 ER PT B AU Hamant, B Kamali, B AF Hamant, B Kamali, B GP IEEE TI A novel direct sequence spread spectrum automatic vehicle identification system SO 1996 IEEE 46TH VEHICULAR TECHNOLOGY CONFERENCE, PROCEEDINGS, VOLS 1-3: MOBILE TECHNOLOGY FOR THE HUMAN RACE LA English DT Proceedings Paper CT IEEE 46th Vehicular Technology Conference - Mobile Technology for the Human Race (VTC 96) CY APR 28-MAY 01, 1996 CL ATLANTA, GA SP IEEE, Vehicular Technol Soc, IEEE, Atlanta Sect C1 USAF,LANGLEY AFB,VA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3158-3 PY 1996 BP 1863 EP 1867 PG 5 WC Telecommunications SC Telecommunications GA BF75V UT WOS:A1996BF75V00381 ER PT B AU Haupt, RL AF Haupt, RL GP IEEE TI Genetic algorithm design of antenna arrays SO 1996 IEEE AEROSPACE APPLICATIONS CONFERENCE, PROCEEDINGS, VOL 1 LA English DT Proceedings Paper CT 1996 IEEE Aerospace Applications Conference CY FEB 03-10, 1996 CL ASPEN, CO SP IEEE Aerosp & Electr Syst Soc C1 USAF ACAD,COLORADO SPRINGS,CO 80840. NR 0 TC 2 Z9 2 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3196-6 PY 1996 BP 103 EP 109 PG 7 WC Engineering, Aerospace; Engineering, Multidisciplinary; Engineering, Electrical & Electronic SC Engineering GA BF08Y UT WOS:A1996BF08Y00005 ER PT B AU Vacek, RM Hopkins, M MacPherson, WH AF Vacek, RM Hopkins, M MacPherson, WH GP IEEE TI The development, demonstration and integration of advanced technologies to improve the Life Cycle Costs of space systems SO 1996 IEEE AEROSPACE APPLICATIONS CONFERENCE, PROCEEDINGS, VOL 1 LA English DT Proceedings Paper CT 1996 IEEE Aerospace Applications Conference CY FEB 03-10, 1996 CL ASPEN, CO SP IEEE Aerosp & Electr Syst Soc C1 USAF,PHILLIPS LAB,INTERMEDIATE TECHNOL DEV & DEMONSTRAT OFF,KIRTLAND AFB,NM 87117. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3196-6 PY 1996 BP 217 EP 225 PG 9 WC Engineering, Aerospace; Engineering, Multidisciplinary; Engineering, Electrical & Electronic SC Engineering GA BF08Y UT WOS:A1996BF08Y00016 ER PT B AU Leitner, J AF Leitner, J GP IEEE TI Space technology transition using hardware in the loop simulation SO 1996 IEEE AEROSPACE APPLICATIONS CONFERENCE, PROCEEDINGS, VOL 2 LA English DT Proceedings Paper CT 1996 IEEE Aerospace Applications Conference CY FEB 03-10, 1996 CL ASPEN, CO SP IEEE Aerosp & Electr Syst Soc C1 USAF,PHILLIPS LAB,SPACE EXPT DIRECTORATE,KIRTLAND AFB,NM 87117. NR 0 TC 2 Z9 2 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3196-6 PY 1996 BP 303 EP 311 PG 9 WC Engineering, Aerospace; Engineering, Electrical & Electronic SC Engineering GA BF08Z UT WOS:A1996BF08Z00025 ER PT B AU Gilles, G AF Gilles, G GP IEEE TI Looking to the future SO 1996 IEEE AEROSPACE APPLICATIONS CONFERENCE, PROCEEDINGS, VOL 4 LA English DT Proceedings Paper CT 1996 IEEE Aerospace Applications Conference CY FEB 03-10, 1996 CL ASPEN, CO SP IEEE Aerosp & Electr Syst Soc C1 USAF,US SPACE COMMAND,WASHINGTON,DC 20330. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3196-6 PY 1996 BP 5 EP 27 PG 23 WC Engineering, Aerospace; Engineering, Electrical & Electronic SC Engineering GA BF09B UT WOS:A1996BF09B00001 ER PT B AU Fiedler, S Preiss, B AF Fiedler, S Preiss, B GP IEEE TI Geosynchronous space based radar concept development for theater surveillance SO 1996 IEEE AEROSPACE APPLICATIONS CONFERENCE, PROCEEDINGS, VOL 4 LA English DT Proceedings Paper CT 1996 IEEE Aerospace Applications Conference CY FEB 03-10, 1996 CL ASPEN, CO SP IEEE Aerosp & Electr Syst Soc C1 USAF,PHILLIPS LAB,KIRTLAND AFB,NM 87117. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3196-6 PY 1996 BP 77 EP 90 PG 14 WC Engineering, Aerospace; Engineering, Electrical & Electronic SC Engineering GA BF09B UT WOS:A1996BF09B00004 ER PT B AU Medley, MJ Saulnier, GJ Das, PK AF Medley, MJ Saulnier, GJ Das, PK BE Lervik, JM Waldemar, P TI Interference suppression using transform domain LMS adaptive filtering SO 1996 IEEE DIGITAL SIGNAL PROCESSING WORKSHOP, PROCEEDINGS LA English DT Proceedings Paper CT 1996 IEEE Digital Signal Processing Workshop (DSPWS-96) CY SEP 01-04, 1996 CL LOEN, NORWAY SP IEEE, NORSIG, ABB Technol, NERA C1 USAF,ROME LAB,ROME,NY 13441. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3629-1 PY 1996 BP 117 EP 120 DI 10.1109/DSPWS.1996.555474 PG 4 WC Engineering, Electrical & Electronic; Optics SC Engineering; Optics GA BG39X UT WOS:A1996BG39X00030 ER PT B AU Huang, Y Suter, B AF Huang, Y Suter, B BE Lervik, JM Waldemar, P TI Fractional wave packet transform SO 1996 IEEE DIGITAL SIGNAL PROCESSING WORKSHOP, PROCEEDINGS LA English DT Proceedings Paper CT 1996 IEEE Digital Signal Processing Workshop (DSPWS-96) CY SEP 01-04, 1996 CL LOEN, NORWAY SP IEEE, NORSIG, ABB Technol, NERA C1 USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3629-1 PY 1996 BP 413 EP 415 DI 10.1109/DSPWS.1996.555549 PG 3 WC Engineering, Electrical & Electronic; Optics SC Engineering; Optics GA BG39X UT WOS:A1996BG39X00105 ER PT B AU Liou, LL Jenkins, T Huang, CI AF Liou, LL Jenkins, T Huang, CI GP IEEE TI Effect of base potential distribution on thermal runaway and the power limitation of the heterojunction bipolar transistor with circular dot geometry SO 1996 IEEE HONG KONG ELECTRON DEVICES MEETING, PROCEEDINGS LA English DT Proceedings Paper CT 1996 IEEE Hong Kong Electron Devices Meeting (HKEDM 1966) CY JUN 29, 1996 CL HONG KONG POLYTECH UNIV, HONG KONG, HONG KONG SP IEEE Electron Devices Soc, Hong Kong Polytech Univ, Dept Electr Engn HO HONG KONG POLYTECH UNIV AB The de power limitation of heterojunction bipolar transistor (HBT) with dot geometry is studied theoretically using combined electro-thermal and transmission line models. In most cases, thermal runaway occurs at a power level lower than the limit set by the intrinsic electronic property of the device. The inter-relation among the maximum operational power, emitter ballast resistance and emitter dot radius are established and discussed. The discussion is based on the theory of junction-temperature-rise-threshold for the thermal runaway and the base potential distribution in the emitter-base junction. RP Liou, LL (reprint author), WRIGHT LAB,SOLID STATE ELECT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3091-9 PY 1996 BP 49 EP 52 PG 4 WC Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BH11K UT WOS:A1996BH11K00013 ER PT B AU Colombi, JM Ruck, DW Anderson, TR Rogers, SK Oxley, M AF Colombi, JM Ruck, DW Anderson, TR Rogers, SK Oxley, M GP IEEE TI Cohort selection and word grammar effects for speaker recognition SO 1996 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, CONFERENCE PROCEEDINGS, VOLS 1-6 LA English DT Proceedings Paper CT 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 96) CY MAY 07-10, 1996 CL ATLANTA, GA SP IEEE, Signal Proc Soc C1 USAF,INST TECHNOL,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 3 Z9 4 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3192-3 J9 INT CONF ACOUST SPEE PY 1996 BP 85 EP 88 PG 4 WC Acoustics; Engineering, Electrical & Electronic SC Acoustics; Engineering GA BG26G UT WOS:A1996BG26G00022 ER PT B AU Goldstein, JS Zulch, PA Reed, IS AF Goldstein, JS Zulch, PA Reed, IS GP IEEE TI Reduced rank space-time adaptive radar processing SO 1996 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, CONFERENCE PROCEEDINGS, VOLS 1-6 LA English DT Proceedings Paper CT 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 96) CY MAY 07-10, 1996 CL ATLANTA, GA SP IEEE, Signal Proc Soc C1 USAF,ROME LAB,GRIFFISS AFB,NY 13441. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3192-3 J9 INT CONF ACOUST SPEE PY 1996 BP 1173 EP 1176 PG 4 WC Acoustics; Engineering, Electrical & Electronic SC Acoustics; Engineering GA BG26G UT WOS:A1996BG26G00296 ER PT B AU Merkle, LD Lamont, GB Gates, GH Pachter, R AF Merkle, LD Lamont, GB Gates, GH Pachter, R GP IEEE TI Hybrid genetic algorithms for minimization of a polypeptide specific energy model SO 1996 IEEE INTERNATIONAL CONFERENCE ON EVOLUTIONARY COMPUTATION (ICEC '96), PROCEEDINGS OF LA English DT Proceedings Paper CT 1996 IEEE International Conference on Evolutionary Computation (ICEC 96) CY MAY 20-22, 1996 CL NAGOYA UNIV, NAGOYA, JAPAN SP IEEE, Neural Network Council, Soc Instrument & Control Engineers, Robot Soc Japan, Japan Soc Fuzzy Theory & Syst, Japan Soc Mech Engineers HO NAGOYA UNIV C1 USAF,INST TECHNOL,GRAD SCH ENGN,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-2903-1 PY 1996 BP 396 EP 400 PG 5 WC Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BG12G UT WOS:A1996BG12G00071 ER PT S AU Hunter, MW Spenny, CH AF Hunter, MW Spenny, CH GP IEEE, ROBOT & AUTOMAT SOC TI Contact force assignment using fuzzy logic SO 1996 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION, PROCEEDINGS, VOLS 1-4 SE IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION LA English DT Proceedings Paper CT 1996 IEEE International Conference on Robotics and Automation CY APR 22-28, 1996 CL MINNEAPOLIS, MN SP IEEE, Robot & Automat Soc C1 USAF,INST TECHNOL,DEPT AERONAUT & ASTRONAUT,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 1050-4729 BN 0-7803-2989-9 J9 IEEE INT CONF ROBOT PY 1996 BP 1345 EP 1350 PG 6 WC Automation & Control Systems SC Automation & Control Systems GA BF68P UT WOS:A1996BF68P00211 ER PT S AU Pack, DJ AF Pack, DJ GP IEEE, ROBOT & AUTOMAT SOC TI Perception-based control for a quadruped walking robot SO 1996 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION, PROCEEDINGS, VOLS 1-4 SE IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION LA English DT Proceedings Paper CT 1996 IEEE International Conference on Robotics and Automation CY APR 22-28, 1996 CL MINNEAPOLIS, MN SP IEEE, Robot & Automat Soc C1 USAF ACAD,DEPT ELECT ENGN,COLORADO SPRINGS,CO 80950. NR 0 TC 11 Z9 12 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 1050-4729 BN 0-7803-2989-9 J9 IEEE INT CONF ROBOT PY 1996 BP 2994 EP 3001 PG 8 WC Automation & Control Systems SC Automation & Control Systems GA BF68P UT WOS:A1996BF68P00470 ER PT S AU Creech, GL Paul, B Lesniak, C Jenkins, T Lee, R Calcatera, M AF Creech, GL Paul, B Lesniak, C Jenkins, T Lee, R Calcatera, M BE Ranson, RG Pollard, RD TI Artificial neural networks for accurate microwave CAD applications SO 1996 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-3 SE IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST LA English DT Proceedings Paper CT 1996 IEEE MTT-S International Microwave Symposium CY JUN 17-21, 1996 CL SAN FRANCISCO, CA SP IEEE, MTT Soc C1 WRIGHT LAB,SOLID STATE ELECT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 11 Z9 11 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0149-645X BN 0-7803-3247-4 J9 IEEE MTT-S PY 1996 BP 733 EP 736 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BF95U UT WOS:A1996BF95U00168 ER PT S AU Dettmer, R Jenkins, T Barrette, J Bozada, C DeSalvo, G Ebel, J Gillespie, J Havasy, C Ito, C Nakano, K Pettiford, C Quach, T Sewell, J Via, D Anholt, R AF Dettmer, R Jenkins, T Barrette, J Bozada, C DeSalvo, G Ebel, J Gillespie, J Havasy, C Ito, C Nakano, K Pettiford, C Quach, T Sewell, J Via, D Anholt, R BE Ranson, RG Pollard, RD TI Effect of device layout on the thermal resistance of high-power thermally-shunted heterojunction bipolar transistors SO 1996 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-3 SE IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST LA English DT Proceedings Paper CT 1996 IEEE MTT-S International Microwave Symposium CY JUN 17-21, 1996 CL SAN FRANCISCO, CA SP IEEE, MTT Soc C1 WRIGHT LAB,SOLID STATE SCI DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 1 Z9 1 U1 0 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0149-645X BN 0-7803-3247-4 J9 IEEE MTT-S PY 1996 BP 1607 EP 1610 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BF95U UT WOS:A1996BF95U00374 ER PT B AU Sisti, AF Farr, SD AF Sisti, AF Farr, SD BE Charnes, JM Morrice, DJ Brunner, DT Swain, JJ TI Modeling and simulation enabling technologies for military applications SO 1996 WINTER SIMULATION CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1996 Winter Simulation Conference (WSC 96) CY DEC 08-11, 1996 CL CORONADO, CA SP Amer Stat Assoc, Assoc Comp Machinery, SIGSIM, Inst Operat Res & Management Sci, Inst Operat Res & Management Sci, Coll Simulat, IEEE Comp Soc, IEEE Syst Man & Cybernet Soc, Inst Ind Engineers, NIST, Soc Comp Simulat Int AB While there has been much attention paid lately to the field of Modeling and Simulation as a general tool to be used in specific and well-founded application areas, little has been done to address those broad technology areas that enable such application-oriented simulations to be more easily constructed, run and analyzed. This paper deals with the wide variety of research issues in simulation science being addressed by Government, academia and industry, and their application to the military domain; specifically, to the problems of the Intelligence analyst. RP Sisti, AF (reprint author), USAF,ROME LAB,IRAE,32 HANGAR RD,ROME,NY 13441, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3383-7 PY 1996 BP 877 EP 883 PG 7 WC Computer Science, Cybernetics; Engineering, Industrial; Engineering, Manufacturing; Engineering, Electrical & Electronic; Statistics & Probability SC Computer Science; Engineering; Mathematics GA BH19F UT WOS:A1996BH19F00125 ER PT B AU Rousseau, GG Bauer, KW AF Rousseau, GG Bauer, KW BE Charnes, JM Morrice, DJ Brunner, DT Swain, JJ TI Sensitivity analysis of a large: Scale transportation simulation using design of experiments and factor analysis SO 1996 WINTER SIMULATION CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1996 Winter Simulation Conference (WSC 96) CY DEC 08-11, 1996 CL CORONADO, CA SP Amer Stat Assoc, Assoc Comp Machinery, SIGSIM, Inst Operat Res & Management Sci, Inst Operat Res & Management Sci, Coll Simulat, IEEE Comp Soc, IEEE Syst Man & Cybernet Soc, Inst Ind Engineers, NIST, Soc Comp Simulat Int AB This paper describes how design of experiments and factor analysis were used to conduct sensitivity analysis on multivariate output from a large scale transportation simulation model. Specifically, this research focused on the sensitivity of airlift system performance to changes or errors in a list of transportation requirements. The general approach included perturbing a time-phased list of transportation requirements according to an experimental design and using a simulation model to estimate the airlift system performance response. We used factor analysis to reduce the dimensionality of the multivariate output data and to generate sensitivity plots, which proved to be valuable graphical tools for sensitivity analysis. Additionally, we identified how factor analysis can be used as a verification and validation tool for large stochastic simulation models. RP Rousseau, GG (reprint author), HEADQUARTERS AIR MOBIL COMMAND,STUDIES & ANAL FLIGHT,402 SCOTT DR UNIT 3L3,SCOTT AFB,IL 62225, USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3383-7 PY 1996 BP 1426 EP 1432 PG 7 WC Computer Science, Cybernetics; Engineering, Industrial; Engineering, Manufacturing; Engineering, Electrical & Electronic; Statistics & Probability SC Computer Science; Engineering; Mathematics GA BH19F UT WOS:A1996BH19F00205 ER PT B AU Karna, SP Pugh, RD Brothers, CP Shedd, W Singaraju, BBK AF Karna, SP Pugh, RD Brothers, CP Shedd, W Singaraju, BBK GP IEEE IEEE IEEE TI Microscopic structure and generation mechanism of E-gamma ' centers in buried oxide SO 1997 IEEE INTERNATIONAL SOI CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1997 IEEE International SOI Conference CY OCT 06-09, 1997 CL YOSEMITE, CA SP IEEE Electron Devices Soc AB It is shown on the basis of first-principles quantum mechanical calculations that the observed 420G hyperfine signal attributed to the E-gamma' center in amorphous SiO2 could result either from a negatively charged symmetric or from a positively charged asymmetric oxygen-deficient center (ODC). Energetic considerations slightly favor a positively charged ODC at preexisting asymmetric drop Si-Si drop sites as the local microscopic structure of E-gamma' center. C1 USAF, Phillips Lab, Space Miss Technol Div, Kirtland AFB, NM 87117 USA. RP Karna, SP (reprint author), USAF, Phillips Lab, Space Miss Technol Div, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-3938-X PY 1996 BP 32 EP 33 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA BK07W UT WOS:000071090200015 ER PT B AU Vanheusden, K Warren, WL Shedd, WM Pugh, RD Fleetwood, DM Schwank, JR Devine, RAB AF Vanheusden, K Warren, WL Shedd, WM Pugh, RD Fleetwood, DM Schwank, JR Devine, RAB GP IEEE IEEE IEEE TI Characterization of interface traps in SOI material SO 1997 IEEE INTERNATIONAL SOI CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1997 IEEE International SOI Conference CY OCT 06-09, 1997 CL YOSEMITE, CA SP IEEE Electron Devices Soc C1 USAF, Phillips Lab, Space Mission Technol Div, Kirtland AFB, NM 87117 USA. RP Vanheusden, K (reprint author), USAF, Phillips Lab, Space Mission Technol Div, 3550 Aberdeen Ave, Kirtland AFB, NM 87117 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-3938-X PY 1996 BP 64 EP 65 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA BK07W UT WOS:000071090200031 ER PT B AU Roybal, R Shivery, J Stein, C Tolmak, P AF Roybal, R Shivery, J Stein, C Tolmak, P GP NASA TI Laboratory simulation of hypervelocity debris SO 19TH SPACE SIMULATION CONFERENCE: COST EFFECTIVE TESTING FOR THE 21ST CENTURY SE NASA CONFERENCE PUBLICATION LA English DT Proceedings Paper CT 19th Space Simulation Conference - Cost Effective Testing for the 21st-Century CY OCT 28-31, 1996 CL BALTIMORE, MD SP NASA, Inst Environm Sci, Amer Inst Aeronaut & Astron, Amer Soc Testing & Mat, Canadian Space Agcy AB Efforts to simulate the space environment over the past years have consisted of looking at individual effects of the space environment such as atomic oxygen, ultra violet radiation, electron bombardment, and debris impact on space craft materials. The effects of hypervelocity impacts on the properties of materials have been the subject of numerous studies (ref. 1). As the interest in long duration space missions increased the interest in the synergistic effects of the entire space environment has also increased. In order to simulate the space environment in a more complete fashion it has been necessary to build simulation chambers capable of simulating many space effects. With this in mind it was easily seen that the design criteria for a space source such as a debris simulator consisted of two factors. First, the simulation technique must be able to reproduce the space environment parameters of interest, secondly and just as important the simulation technique must be compatible with the space effects chamber including all other sources and diagnostic instrumentation used. This work looked at a relatively new method to simulate space debris, the laser driven flyer accelerator, and its usefulness in a space environment effects chamber. RP Roybal, R (reprint author), USAF,PHILLIPS LAB,KIRTLAND AFB,NM 87117, USA. NR 0 TC 1 Z9 2 U1 0 U2 0 PU NASA PI WASHINGTON PA WASHINGTON, DC 20546 J9 NASA CONF P PY 1996 VL 3341 BP 231 EP 239 PG 9 WC Engineering, Aerospace SC Engineering GA BG87U UT WOS:A1996BG87U00025 ER PT J AU Krasner, RD Gayno, GA Spero, TL Mitchell, KE AF Krasner, RD Gayno, GA Spero, TL Mitchell, KE GP AMER METEOROL SOC TI Implementation of global real-time soil moisture and climatological fraction of photosynthetic active radiation data in an operational relocatable numerical weather prediction model SO 22ND CONFERENCE ON AGRICULTURAL & FOREST METEOROLOGY WITH SYMPOSIUM ON FIRE & FOREST METEOROLOGY/12TH CONFERENCE ON BIOMETEOROLOGY & AEROBIOLOGY LA English DT Proceedings Paper CT 22nd Conference on Agricultural and Forest Meteorology with Symposium on Fire and Forest Meteorology/12th Conference on Biometeorology and Aerobiology CY JAN 28-FEB 02, 1996 CL ATLANTA, GA SP Amer Meteorol Soc C1 USAF,GLOBAL WEATHER CENT,OFFUTT AFB,NE 68113. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108 PY 1996 BP 354 EP 357 PG 4 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA BF44H UT WOS:A1996BF44H00106 ER PT B AU OKeefe, MJ AF OKeefe, MJ BE Singh, J Copley, SM Mazumder, J TI Physical vapor deposition of metastable A-15 crystal structure thin films SO 2ND INTERNATIONAL CONFERENCE ON BEAM PROCESSING OF ADVANCED MATERIALS, CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 2nd International Conference on Beam Processing of Advanced Materials CY OCT 30-NOV 02, 1995 CL CLEVELAND, OH SP ASM MSD, Synthesis & Proc Comm, Amer Welding Soc C1 WRIGHT LAB,WRIGHT PATTERSON AFB,OH. NR 0 TC 0 Z9 0 U1 0 U2 1 PU ASM INTERNATIONAL PI MATERIALS PARK PA 9503 KINSMAN RD, MATERIALS PARK, OH 44073 BN 0-87170-563-X PY 1996 BP 219 EP 230 PG 12 WC Materials Science, Multidisciplinary SC Materials Science GA BG22D UT WOS:A1996BG22D00021 ER PT J AU Waguespack, RL Kearse, WS AF Waguespack, RL Kearse, WS TI Renal cell carcinoma arising from the free wall of a renal cyst SO ABDOMINAL IMAGING LA English DT Article DE kidney, neoplasms; renal cyst, CT diagnosis AB We report an unusual case of a 1 cm papillary renal cell carcinoma arising from the outer surface of the free wall of a radiographically simple renal cyst. Most malignancies arising from the wall of a renal cyst are present along the inner surface, usually adjacent to underlying renal parenchyma. While this is a rare occurrence, it does reinforce the need to explore even small solid renal masses. C1 PSSU,WILFORD HALL USAF MED CTR,DEPT UROL,LACKLAND AFB,TX 78236. NR 4 TC 5 Z9 5 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0942-8925 J9 ABDOM IMAGING JI Abdom. Imaging PD JAN-FEB PY 1996 VL 21 IS 1 BP 71 EP 72 DI 10.1007/s002619900015 PG 2 WC Gastroenterology & Hepatology; Radiology, Nuclear Medicine & Medical Imaging SC Gastroenterology & Hepatology; Radiology, Nuclear Medicine & Medical Imaging GA TN206 UT WOS:A1996TN20600015 PM 8672979 ER PT B AU Merritt, P Cusumano, S Kramer, M OKeefe, S Higgs, C AF Merritt, P Cusumano, S Kramer, M OKeefe, S Higgs, C BE Masten, MK Stockum, LA TI Active tracking of a ballistic missile in the boost phase SO ACQUISITION, TRACKING, AND POINTING X SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Acquisition, Tracking, and Pointing X Conference CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE active track; illumination; turbulence; scintillation; tracking algorithms C1 USAF,PHILLIPS LAB,AIRBORNE LASER TECHOL DIV,KIRTLAND AFB,NM 87117. NR 0 TC 1 Z9 1 U1 1 U2 2 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2120-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2739 BP 19 EP 29 DI 10.1117/12.241917 PG 11 WC Engineering, Aerospace; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BF87E UT WOS:A1996BF87E00002 ER PT J AU Wu, CJ Shi, HS AF Wu, CJ Shi, HS TI The optimal truncated low-dimensional dynamical systems based on flow databases SO ACTA MECHANICA SINICA LA English DT Article DE partial differential equation; flow database; optimization; dynamical system ID COHERENT STRUCTURES; TURBULENT AB A new theory on the construction of optimal truncated Low-Dimensional Dynamical Systems (LDDSs) with different physical meanings has been developed, The physical properties of the optimal bases are reflected in the user-defined optimal conditions, Through the analysis of linear and nonlinear examples, it is shown that the LDDSs constructed by using the Proper Orthogonal Decomposition (POD) method are not the optimum. After comparing the errors of LDDSs based on the new theory POD and Fourier methods, it is concluded that the LDDSs based on the new theory are optimally truncated and catch the desired physical properties of the systems. RP Wu, CJ (reprint author), USAF,INST METEOROL,NANJING 211101,PEOPLES R CHINA. NR 13 TC 1 Z9 4 U1 1 U2 1 PU SCIENCE CHINA PRESS PI BEIJING PA 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA SN 0567-7718 J9 ACTA MECH SINICA JI Acta Mech. Sin. PY 1996 VL 12 IS 2 BP 104 EP 116 PG 13 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA UQ533 UT WOS:A1996UQ53300002 ER PT B AU Reid, JR Bright, VM Comtois, JH AF Reid, JR Bright, VM Comtois, JH BE Hatheway, AE TI Arrays of thermal micro-actuators coupled to micro-optical components SO ACTUATOR TECHNOLOGY AND APPLICATIONS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Actuator Technology and Applications CY AUG 07-08, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE micro-electro-mechanical systems; micro-opto-electro-mechanical systems; actuators; micromachining AB The power provided by individual surface micromachined micro-actuators is often insufficient to drive micro-optical components. Therefore. arrays of polycrystalline silicon thermal micro-actuators have been developed. The coupling of the actuators combines their forces to overcome the friction involved with sliders and hinges. This is demonstrated with the fabrication of a scanning micro-mirror and a lateral scanning micro-mirror. The scanning micro-mirror is connected to the substrate using substrate micro-hinges, thus allowing the plate to rotate off of the substrate surface. The micro-mirror is lifted off the substrate and locked into a support mechanism directly connected to the thermal actuator array. Utilizing the actuators, the angle between the micro-mirror and the substrate surface is modulated. The actuator array is capable of moving the mirror plate through a range of 15 degrees. The lateral scanning micro-mirror is connected to the substrate with floating substrate hinges mounted to the substrate with a rotating pin joint. The hinge support is directly connected to an actuator array by a thin polysilicon tether. The micro-mirror rotates through 5 degrees about the pin joint by driving the actuator array with an electrical current. These mirrors can be used in a variety of micro-optical systems such as optical scanners, corner cube reflectors, and optical couplers. RP Reid, JR (reprint author), USAF,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433, USA. NR 0 TC 11 Z9 11 U1 0 U2 2 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2253-3 J9 P SOC PHOTO-OPT INS PY 1996 VL 2865 BP 74 EP 82 DI 10.1117/12.259030 PG 9 WC Optics SC Optics GA BG84M UT WOS:A1996BG84M00011 ER PT B AU Pack, D Toussaint, G Haupt, R AF Pack, D Toussaint, G Haupt, R BE Caulfield, HJ Chen, SS TI Robot trajectory planning using a genetic algorithm SO ADAPTIVE COMPUTING: MATHEMATICAL AND PHYSICAL METHODS FOR COMPLEX ENVIRONMENTS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Adaptive Computing - Mathematical and Physical Methods for Complex Environments CY AUG 04-05, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE robot trajectory planning; genetic algorithms; obstacle avoidance AB In this paper, we studied the trajectory generation problem for a two-degrees-of-freedom robot in a workspace with obstacles. To generate the robot's trajectories, we developed a genetic algorithm to search for valid solutions in the configuration space. Our results present a novel perspective on the problem not seen in the conventional robot trajectory planners. The genetic algorithm approach is beneficial because it may be ex tended to plan trajectories for robots with more degrees of freedom. The evolutionary search process may allow the user to solve the trajectory problem in an n-dimensional space where the ''curse of dimensionality'' inevitably stalls conventional methods. We demonstrate the algorithm with some examples and discuss the possible extension to higher order problems. RP Pack, D (reprint author), USAF ACAD,DEPT ELECT ENGN,COLORADO SPRINGS,CO 80840, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2212-6 J9 P SOC PHOTO-OPT INS PY 1996 VL 2824 BP 171 EP 182 DI 10.1117/12.258129 PG 12 WC Computer Science, Artificial Intelligence; Optics SC Computer Science; Optics GA BG73J UT WOS:A1996BG73J00018 ER PT J AU Fiedler, ER Williams, LN Gackstetter, G Hermesch, C Lando, H AF Fiedler, ER Williams, LN Gackstetter, G Hermesch, C Lando, H TI Assessment of tobacco use prevalence and behavior among air force recruits SO ADDICTION LA English DT Meeting Abstract C1 WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236. UNIV MINNESOTA,MINNEAPOLIS,MN 55455. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CARFAX PUBL CO PI ABINGDON PA PO BOX 25, ABINGDON, OXFORDSHIRE, ENGLAND OX14 3UE SN 0965-2140 J9 ADDICTION JI Addiction PD JAN PY 1996 VL 91 IS 1 BP 139 EP 139 PG 1 WC Substance Abuse; Psychiatry SC Substance Abuse; Psychiatry GA TQ693 UT WOS:A1996TQ69300025 ER PT B AU Williams, R AF Williams, R BE Luk, FT TI Time sequenced adaptive filtering using a modified P-vector algorithm SO ADVANCED SIGNAL PROCESSING ALGORITHMS, ARCHITECTURES, AND IMPLEMENTATIONS VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Advanced Signal Processing Algorithms, Architectures, and Implementations VI CY AUG 06-08, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE time sequenced adaptive filter; EEG; biomedical signal processing; radar signal processing C1 USAF,WRIGHT LAB,AUTOMAT TARGET RECOGNIT DEV BRANCH,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2234-7 J9 P SOC PHOTO-OPT INS PY 1996 VL 2846 BP 141 EP 150 DI 10.1117/12.255428 PG 10 WC Optics SC Optics GA BG61D UT WOS:A1996BG61D00014 ER PT B AU Wells, R Baxley, S Williams, D AF Wells, R Baxley, S Williams, D BE VoDinh, T TI Rate constants and atmospheric transformations of Air Force VOCs SO ADVANCED TECHNOLOGIES FOR ENVIRONMENTAL MONITORING AND REMEDIATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Advanced Technologies for Environmental Monitoring and Remediation CY AUG 06-08, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE hydroxyl radical; VOC; 2-ethoxyethyl acetate; atmospheric chemistry AB Advances in spectroscopic techniques have led to a better understanding of the atmospheric chemistry of volatile organic compounds (VOC). Two important atmospheric properties of VOC's are the hydroxyl radical (OH .) rate constant and OH ./VOC reaction products. Gas chromatography (GC) and gas chromatography/mass spectroscopy/infrared spectroscopy (GC/MS/FTIR) are currently used in our laboratory to obtain this data. The OH . rate constant and reaction products have been investigated for 2-ethoxyethyl acetate (CH3C(=O)OCH2CH2OCH2CH3), a paint thinner and paint component. Using the spectroscopic techniques mentioned above, the first detailed atmospheric reaction mechanism for 2-ethoxyethyl acetate will be presented. New areas of atmospheric research utilizing spectroscopic techniques will be discussed. RP Wells, R (reprint author), AL EQL,139 BARNES DR,TYNDALL AFB,FL 32403, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2223-1 J9 P SOC PHOTO-OPT INS PY 1996 VL 2835 BP 153 EP 160 DI 10.1117/12.259768 PG 8 WC Engineering, Environmental; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BH01G UT WOS:A1996BH01G00018 ER PT B AU Bruno, JG Collard, SB Kuch, DJ Cornette, JC AF Bruno, JG Collard, SB Kuch, DJ Cornette, JC BE VoDinh, T TI Novel biological sources of electrochemiluminescence and potential applications to metals detection SO ADVANCED TECHNOLOGIES FOR ENVIRONMENTAL MONITORING AND REMEDIATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Advanced Technologies for Environmental Monitoring and Remediation CY AUG 06-08, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE biosensors; bioluminescence; chelation; chemiluminescence; electrochemiluminescence; environment ligands; metals AB Electrochemiluminescence (ECL) is an electrochemical means of generating light from certain organic-metal complexes (e.g., Cr, Os, or Ru with bipyridine) and other types of molecules. Thus, it may be possible to develop an ECL-based metals sensor or biosensor consisting of organic molecules coated onto electrodes which emit light only upon complexation of particular metal ions and application of a small voltage. Toxic metals in water sources are of environmental concern. Some marine invertebrates, such as tunicates (i.e., ''sea squirts'') and molluscs, are noted for their ability to concnetrate toxic metals as much as 100 million-fold over ambient seawater concentrations. In the present work extracts from a tunicate species, as well as synthetic tunicate blood pigments or ''tunichromes'', oysters, and other organisms are examined for intrinsic ECL in the presence and absence of various metal ions. Results suggest a promising navel potentially sensitive, and specific means for metal ion detection based on ECL. RP Bruno, JG (reprint author), APPL RES ASSOCIATES,139 BARNES DR,SUITE 2,TYNDALL AFB,FL 32403, USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2223-1 J9 P SOC PHOTO-OPT INS PY 1996 VL 2835 BP 161 EP 166 DI 10.1117/12.259769 PG 6 WC Engineering, Environmental; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BH01G UT WOS:A1996BH01G00019 ER PT B AU VanBenthem, MH Mitchell, BC Gillispie, GD StGermain, RW AF VanBenthem, MH Mitchell, BC Gillispie, GD StGermain, RW BE VoDinh, T TI Chemometric treatment of multimode laser-induced fluorescence (LIF) data of fuel-spiked soils SO ADVANCED TECHNOLOGIES FOR ENVIRONMENTAL MONITORING AND REMEDIATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Advanced Technologies for Environmental Monitoring and Remediation CY AUG 06-08, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE chemometrics; trilinear resolution; PARAFAC; classification cluster analysis; laser-induced fluorescence; fiber optic spectroscopy; fuel; fluorescence AB Field screening of fuel-contaminated soils using laser-induced fluorescence is a cost effective and timely method of characterizing contaminated sites. Data collected with laser-based screening tools are often extensive and difficult to interpret. Pattern recognition algorithms can be utilized to enable less highly trained personnel to identify contaminants. In this work, fluorescence intensity of various hydrocarbon fuels deposited on various soil types was measured as a function of emission wavelength and decay time, generating wavelength-time matrices (WTMs). The data were arranged into a three mode array and subjected to trilinear decomposition (TLD). The results of the TLD were then utilized in pattern recognition schemes, specifically, linear discrimination and classification and hierarchical cluster analysis. Classification rates and clustering results indicate that these techniques can be very valuable tools in site characterization. RP VanBenthem, MH (reprint author), USAF,ARMSTRONG LAB,139 BARNES DR,SUITE 2,TYNDALL AFB,FL 32403, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2223-1 J9 P SOC PHOTO-OPT INS PY 1996 VL 2835 BP 167 EP 178 DI 10.1117/12.259770 PG 12 WC Engineering, Environmental; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BH01G UT WOS:A1996BH01G00020 ER PT B AU Lutsko, JM Turbyfill, ME Berinato, RJ Zari, MC AF Lutsko, JM Turbyfill, ME Berinato, RJ Zari, MC BE Pape, DR TI Simulation of multipath jammer scenarios to support adaptive cancellation field tests SO ADVANCES IN OPTICAL INFORMATION PROCESSING VII SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Advances in Optical Information Processing VII Conference CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE multipath; correlation; acousto-optic; phased-array C1 USAF,ROME LAB,PHOTON DIV,ROME,NY 13441. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2135-9 J9 P SOC PHOTO-OPT INS PY 1996 VL 2754 BP 83 EP 90 DI 10.1117/12.243148 PG 8 WC Optics SC Optics GA BG01T UT WOS:A1996BG01T00009 ER PT B AU Ausink, J Wise, DA AF Ausink, J Wise, DA BE Wise, DA TI The military pension, compensation, and retirement of US Air Force pilots SO ADVANCES IN THE ECONOMICS OF AGING SE NATIONAL BUREAU OF ECONOMIC RESEARCH PROJECT REPORTS LA English DT Proceedings Paper CT Conference on Advances in the Economics of Aging CY MAY, 1993 CL CAREFREE, AZ SP US Dept HHS, NIA, Natl Bur Econ Res C1 USAF,WASHINGTON,DC 20330. NR 0 TC 2 Z9 2 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5801 S ELLIS AVE, CHICAGO, IL 60637 BN 0-226-90302-8 J9 NAT BUR EC PY 1996 BP 83 EP 114 PG 32 WC Economics; Geriatrics & Gerontology; Social Issues SC Business & Economics; Geriatrics & Gerontology; Social Issues GA BG17T UT WOS:A1996BG17T00004 ER PT B AU Semiatin, SL Seetharaman, V Weiss, I AF Semiatin, SL Seetharaman, V Weiss, I BE Weiss, I Srinivasan, R Bania, PJ Eylon, D Semiatin, SL TI Hot working of titanium alloys - An overview SO ADVANCES IN THE SCIENCE AND TECHNOLOGY OF TITANIUM ALLOY PROCESSING LA English DT Review CT International Symposium on Advances in the Science and Technology of Titanium Alloy Processing at the 125th TMS Annual Meeting and Exhibition CY FEB 05-08, 1996 CL ANAHEIM, CA SP TMS Titanium & Shaping & Forming Comm ID TI-AL ALLOYS; SUPERPLASTIC BEHAVIOR; DEFORMATION CHARACTERISTICS; MICROSTRUCTURE DEVELOPMENT; INTERMETALLIC ALLOYS; ALUMINIDE FOILS; SHEET MATERIALS; TI-6AL-2SN-4ZR-2MO-0.1SI; NB; HOMOGENIZATION AB The thermomechanical processing of ingot metallurgy titanium alloys is summarized with special emphasis on microstructure evolution and workability considerations for alpha/beta, beta, alpha-two titanium aluminide, orthorhombic titanium aluminide, and gamma titanium aluminide alloys. The conversion of ingot structures to fine equiaxed wrought structures is addressed. In this regard, the breakdown of lamellar microstructures, the occurrence of cavitation/wedge cracking, and the development of crystallographic texture are described. Special methods to breakdown the difficult-to-work titanium aluminide alloys are also summarized. These methods include canned hot extrusion and canned conventional forging, Secondary processes such as bare and pack sheet rolling, superplastic forming of sheet, and closed-die forging are also reviewed. The emergence of non-standard methods for microstructure control, e.g., forging of metastable microstructures, is summarized as well. C1 Wright Lab, Mat Directorate, MLLN, Wright Patterson AFB, OH 45433 USA. RP Semiatin, SL (reprint author), Wright Lab, Mat Directorate, MLLN, Wright Patterson AFB, OH 45433 USA. RI SEMIATIN, SHELDON/E-7264-2017 NR 133 TC 13 Z9 13 U1 0 U2 12 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086-7514 USA BN 0-87339-324-4 PY 1996 BP 3 EP 73 PG 71 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA BM47L UT WOS:000078852200001 ER PT B AU Lombard, CM Ghosh, AK Semiatin, SL AF Lombard, CM Ghosh, AK Semiatin, SL BE Weiss, I Srinivasan, R Bania, PJ Eylon, D Semiatin, SL TI Effect of microstructure on cavitation and failure behavior during superplastic deformation of a near-gamma titanium aluminide alloy SO ADVANCES IN THE SCIENCE AND TECHNOLOGY OF TITANIUM ALLOY PROCESSING LA English DT Proceedings Paper CT International Symposium on Advances in the Science and Technology of Titanium Alloy Processing at the 125th TMS Annual Meeting and Exhibition CY FEB 05-08, 1996 CL ANAHEIM, CA SP TMS Titanium & Shaping & Forming Comm AB The uniaxial hot tension behavior of sheet of a near-gamma titanium aluminide alloy (Ti-45.5Al-2Cr-2Nb) was determined in the as-rolled condition (initial grain size approximate to 3 to 5 mu m) and a rolled-and-heat treated (1175 degrees C/4 hours) condition (initial grain size approximate to 10 to 12 mu m). Microstructure evolution, cavitation rates, and failure modes were established via constant strain rate tests at 10(-3) sec(-1) and test temperatures between 900 arid 1200 degrees C. After extensive deformation, all specimens exhibited grain refinement at the lower test temperatures; at higher test temperatures, the as-rolled specimens revealed grain growth and the heat treated samples showed grain refinement. For both initial microstructural conditions, the failure mode was established as predominantly cavitation/fracture controlled. Cavity growth rates were greatest at lower temperatures and in the heat treated specimens with the coarser initial grain size; the higher cavitation rates in the heat treated specimens led to total elongations only approximately one-half those of the as-rolled material. For both initial microstructural conditions, the optimum forming temperature was 1200 degrees C. At this temperature, the maximum elongations, minimum cavitation rates, and lowest flow stresses were observed. C1 Wright Lab, MLLN, Wright Patterson AFB, OH 45433 USA. RP Lombard, CM (reprint author), Wright Lab, MLLN, Wright Patterson AFB, OH 45433 USA. RI SEMIATIN, SHELDON/E-7264-2017 NR 5 TC 6 Z9 6 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086-7514 USA BN 0-87339-324-4 PY 1996 BP 161 EP 168 PG 8 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA BM47L UT WOS:000078852200011 ER PT B AU Wasson, W AF Wasson, W BE Fishell, WG Andraitis, AA Crane, AC Fagan, MS TI Argus phase II optical data collection system SO AIRBORNE RECONNAISSANCE XX SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Airborne Reconnaissance XX Conference CY AUG 06-07, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers, N Amer Remote Sensing Ind Assoc, Amer Soc Photogrammetry & Remote Sensing AB The Argus aircraft is a highly modified NC-135E fitted with an infrared and ultraviolet-visible sensor suite for radiometric and spectral data collection. Each suite is operated independently with its own separate gimbal for precision pointing telescope, and relay optics. The system includes a silica window for the ultraviolet-visible, and a zinc selenide window for the infrared The entire system was developed and fabricated in-house at the Phillips Laboratory. All sensors are calibrated as a system onboard the aircraft through a unique facility called the aircraft optical calibration facility (AOCF). The data is all recorded digitally. and can be transferred to secure data reduction facilities via optical fiber. The system is modular, in that the ultraviolet-visible and infrared benches can be separated, or the entire system can be quickly removed to allow for the introduction of other sensor suites or systems. The gimbals and telescopes can be used independently of the rest of the system. The aircraft is also fitted with an anemometry system, which can be operated independently of the sensor systems. This aircraft is capable of many types of missions, and will soon be fitted with a LIDAR system for remote sensing. The philosophy in building the system is to make it capable of quick changes during mission. RP Wasson, W (reprint author), USAF,PHILLIPS LAB,KIRTLAND AFB,NM 87117, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2217-7 J9 P SOC PHOTO-OPT INS PY 1996 VL 2829 BP 108 EP 111 PG 4 WC Engineering, Aerospace; Remote Sensing; Optics SC Engineering; Remote Sensing; Optics GA BG83K UT WOS:A1996BG83K00006 ER PT S AU Hopkins, AK Jata, KV Rioja, RJ AF Hopkins, AK Jata, KV Rioja, RJ BE Driver, JH Dubost, B Durand, F Fougeres, R Guyot, P Sainfort, P Suery, M TI Isotropic wrought aluminum-lithium plate development technology SO ALUMINIUM ALLOYS: THEIR PHYSICAL AND MECHANICAL PROPERTIES, PTS 1-3 SE MATERIALS SCIENCE FORUM LA English DT Article; Proceedings Paper CT 5th International Conference on Aluminium Alloys - Their Physical and Mechanical Properties (ICAA5) CY JUL 01-05, 1996 CL GRENOBLE, FRANCE SP Soc Francaise Met & Mat, Inst Natl Polytech Grenoble DE aerospace materials; AF/C-489; Al-Li; mechanical properties; fracture toughness; fatigue crack growth; cryogenic properties AB Under a contract with the Air Force Wright laboratory, Materials Directorate, the University of Dayton Research Institute and Alcoa synthesized a new experimental aluminum-lithium alloy having the composition: 2.7w/oCu- 2.1w/oLi- 0.6w/oZn- 0.3w/oMn- 0.3w/oMg- 0.05w/o Zr as a part of the AF Isotropic Al-Li Wrought Products program; this alloy is named AF/C-489. Presented in this paper are the results of tensile strength, fracture toughness, and fatigue crack growth rate measurements of the alloy in both the recrystallized and unrecrystallized conditions. C1 USAF,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. ALCOA TECH CTR,ALCOA CTR,PA 15069. RP Hopkins, AK (reprint author), UNIV DAYTON,RES INST,300 COLL PK AVE,DAYTON,OH 45469, USA. NR 12 TC 10 Z9 13 U1 0 U2 0 PU TRANSTEC PUBLICATIONS LTD PI ZURICH-UETIKON PA BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLAND SN 0255-5476 BN 0-87849-732-3 J9 MATER SCI FORUM PY 1996 VL 217 BP 421 EP 426 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films SC Materials Science GA BG37W UT WOS:A1996BG37W00060 ER PT S AU Jata, KV Hopkins, AK Rioja, RJ AF Jata, KV Hopkins, AK Rioja, RJ BE Driver, JH Dubost, B Durand, F Fougeres, R Guyot, P Sainfort, P Suery, M TI The anisotropy and texture of Al-Li alloys SO ALUMINIUM ALLOYS: THEIR PHYSICAL AND MECHANICAL PROPERTIES, PTS 1-3 SE MATERIALS SCIENCE FORUM LA English DT Article; Proceedings Paper CT 5th International Conference on Aluminium Alloys - Their Physical and Mechanical Properties (ICAA5) CY JUL 01-05, 1996 CL GRENOBLE, FRANCE SP Soc Francaise Met & Mat, Inst Natl Polytech Grenoble DE texture; anisotropy; Al-Li; mechanical properties; AF/C-489; aerospace materials ID STRENGTH AB The anisotropy and crystallographic texture of Aluminum plate and sheet used in aerospace applications is first reviewed. Examples from 7150-T7751 and 7055-T7751 plate are presented and discussed. The anisotropy and texture of 2090, 2091 and 8090 flat rolled products are discussed in terms of the hot-rolling texture components. Finally, results from a USAF sponsored program aimed to reduce the intensity of the hot-rolling texture components are discussed in the context of the previous aerospace alloys and products. It is concluded that anisotropy of mechanical properties has different origins. C1 UNIV DAYTON,RES INST,DAYTON,OH 45469. ALCOA TECH CTR,ALCOA CTR,PA 15069. RP Jata, KV (reprint author), USAF,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 10 TC 47 Z9 63 U1 1 U2 6 PU TRANSTEC PUBLICATIONS LTD PI ZURICH-UETIKON PA BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLAND SN 0255-5476 BN 0-87849-732-3 J9 MATER SCI FORUM PY 1996 VL 217 BP 647 EP 652 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films SC Materials Science GA BG37W UT WOS:A1996BG37W00097 ER PT J AU Finkelstein, JA AF Finkelstein, JA TI Oral Ambu-bag insufflation to remove unilateral nasal foreign bodies SO AMERICAN JOURNAL OF EMERGENCY MEDICINE LA English DT Article DE nose; foreign body; insufflation AB The nose is perhaps the most common site for the insertion of foreign bodies by children, Removal is essential, We report the successful use of the oral Ambu-bag insufflation technique to remove unilateral nasal foreign bodies in three children. Conscious sedation was not required, There were no complications. RP Finkelstein, JA (reprint author), WILFORD HALL USAF MED CTR,DEPT EMERGENCY MED PSAE,EMERGENCY MED RESIDENCY,JOINT MIL MED CTR,LACKLAND AFB,TX 78236, USA. NR 10 TC 10 Z9 10 U1 1 U2 1 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0735-6757 J9 AM J EMERG MED JI Am. J. Emerg. Med. PD JAN PY 1996 VL 14 IS 1 BP 57 EP 58 DI 10.1016/S0735-6757(96)90017-0 PG 2 WC Emergency Medicine SC Emergency Medicine GA TU821 UT WOS:A1996TU82100017 PM 8630159 ER PT B AU Nagarsenker, P Nagarsenker, B AF Nagarsenker, P Nagarsenker, B GP AMER STAT ASSOC TI Non-null distribution of Wilk's statistic for testing the equality of two covariance matrices for the complex Gaussian case SO AMERICAN STATISTICAL ASSOCIATION - 1996 PROCEEDINGS OF THE STATISTICAL COMPUTING SECTION LA English DT Proceedings Paper CT Symposium of the Statistical-Computing-Section, at the Annual Meeting of the American-Statistical-Association CY AUG 04-08, 1996 CL CHICAGO, IL SP Amer Stat Assoc, Stat Comp Sect DE Mellin transform; beta distribution AB In this paper exact distribution of the non-null distributions of Wilk's statistic for testing the equlity of two covariance matrices in the complex gaussian case are obtained for the first time using which the exact power of the test can be computed. RP Nagarsenker, P (reprint author), USAF,INST TECHNOL,ENC,WRIGHT PATTERSON AFB,OH 45433, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER STATISTICAL ASSOC PI ALEXANDRIA PA 1429 DUKE ST, ALEXANDRIA, VA 22314 BN 1-883276-40-3 PY 1996 BP 179 EP 181 PG 3 WC Statistics & Probability SC Mathematics GA BJ14Y UT WOS:A1996BJ14Y00034 ER PT J AU Waisel, DB Truog, RD AF Waisel, DB Truog, RD TI CPR-not-indicated and futility - In response SO ANNALS OF INTERNAL MEDICINE LA English DT Letter C1 CHILDRENS HOSP,BOSTON,MA 02115. RP Waisel, DB (reprint author), WILFORD HALL USAF MED CTR,LACKLAND AFB,TX 78236, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER COLL PHYSICIANS PI PHILADELPHIA PA INDEPENDENCE MALL WEST 6TH AND RACE ST, PHILADELPHIA, PA 19106-1572 SN 0003-4819 J9 ANN INTERN MED JI Ann. Intern. Med. PD JAN 1 PY 1996 VL 124 IS 1 BP 77 EP 77 PN 1 PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA TL943 UT WOS:A1996TL94300029 ER PT J AU Curran, ET Heiser, WH Pratt, DT AF Curran, ET Heiser, WH Pratt, DT TI Fluid phenomena in scramjet combustion systems SO ANNUAL REVIEW OF FLUID MECHANICS LA English DT Review DE hypersonic air-breathing propulsion; dual-mode combustors; combustor-isolator interactions; supersonic mixing ID SUPERSONIC COMBUSTION; MODEL AB This paper reviews important advances in understanding and predicting the behavior of scramjet combustion systems since the classic article published in this series by Antonio Ferri (1973). The review focuses on basic fluid phenomena and is divided into three distinct sections. The first briefly describes progress that has been made in the design and demonstration of practical scramjets around the world, especially in the US, the FSU, France, and Germany. The second provides a contemporary exposition of the aerothermodynamics of the dual-mode ramjet/scramjet combustion system, accounting for the role of the isolator in preventing unstart from either thermal choking or how separation due to heat release. The third part summarizes the current state of knowledge regarding fuel-air mixing in dual-mode ramjet/scramjet combustors, especially the potential of axial vorticity to increase mixing effectiveness over that of lateral vorticity. C1 USAF ACAD,DEPT AERONAUT,COLORADO SPRINGS,CO 80840. UNIV WASHINGTON,DEPT MECH ENGN,SEATTLE,WA 98195. RP Curran, ET (reprint author), USAF,WRIGHT LAB,AERO PROP & POWER DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 93 TC 78 Z9 88 U1 4 U2 41 PU ANNUAL REVIEWS INC PI PALO ALTO PA 4139 EL CAMINO WAY, PO BOX 10139, PALO ALTO, CA 94303-0139 SN 0066-4189 J9 ANNU REV FLUID MECH JI Annu. Rev. Fluid Mech. PY 1996 VL 28 BP 323 EP 360 DI 10.1146/annurev.fl.28.010196.001543 PG 38 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA TR815 UT WOS:A1996TR81500010 ER PT B AU Reinhardt, BA AF Reinhardt, BA GP SOC PLAST ENGINEERS INC TI The design of high performance thermoplastic polymers with photonic functionality SO ANTEC '96: PLASTICS - RACING INTO THE FUTURE, VOLS I-III: VOL I: PROCESSING; VOL II: MATERIALS; VOL III: SPACIAL AREAS SE SOCIETY OF PLASTICS ENGINEERS TECHNICAL PAPERS LA English DT Proceedings Paper CT 54th Annual Technical Conference of the Society-of-Plastics-Engineers - Plastics: Racing into the Future (ANTEC 96) CY MAY 05-10, 1996 CL INDIANAPOLIS, IN SP Soc Plast Engineers AB The development of thermoplastics with good linear and nonlinear optical properties has been a major focus of photonics research for the last decade. Thermoplastic polymers offer potential advantages in cost and ease of fabrication over inorganic photonic materials. These materials will only reach commercialization if polymer chemists can synthesize processible polymer structures with the necessary photonic properties. The thermoplastic materials must also be cost competitive with state-of-the-art inorganic materials competitors. The bulk properties of a polymer are directly related to the physical and chemical properties of individual molecules which are in turn dependent on the distribution of electron density within the molecular structure of the polymer repeat unit. In an attempt to design new polymers for various photonic applications it is advantageous to view a polymer molecule from the standpoint of substructural regions with varying degrees of electron density. This presentation reviews examples of past and current research performed in our laboratory using previously unexplored structural elements to design and synthesize new processible thermoplastic polymer structures for a variety of photonic applications. RP Reinhardt, BA (reprint author), USAF,WRIGHT LAB,MLBP,POLYMER BRANCH,2941 P ST STE 1,WRIGHT PATTERSON AFB,OH 45433, USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU SOC PLASTICS ENGINEERS PI BROOKFIELD CENTER PA 14 FAIRFIELD DR, BROOKFIELD CENTER, CT 06805 J9 SOC PLAST E PY 1996 VL 42 BP 1477 EP 1481 PG 5 WC Engineering, Chemical; Engineering, Mechanical; Materials Science, Multidisciplinary; Polymer Science SC Engineering; Materials Science; Polymer Science GA BH28W UT WOS:A1996BH28W00252 ER PT B AU Zahirniak, DR DeSimio, MP AF Zahirniak, DR DeSimio, MP BE Rogers, SK Ruck, DW TI Time series prediction: Statistical and neural techniques SO APPLICATIONS AND SCIENCE OF ARTIFICIAL NEURAL NETWORKS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT SPIE International Conference on Applications and Science of Artificial Neural Networks II CY APR 09-12, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE time series analysis; optimal filtering; prediction; radial basis functions; multilayer perceptron C1 USA,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 1 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2141-3 J9 P SOC PHOTO-OPT INS PY 1996 VL 2760 BP 202 EP 213 DI 10.1117/12.235911 PG 12 WC Computer Science, Artificial Intelligence; Optics; Physics, Applied SC Computer Science; Optics; Physics GA BF31U UT WOS:A1996BF31U00020 ER PT B AU Yen, GG AF Yen, GG BE Rogers, SK Ruck, DW TI Precision tracking control in flexible pointing structures SO APPLICATIONS AND SCIENCE OF ARTIFICIAL NEURAL NETWORKS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT SPIE International Conference on Applications and Science of Artificial Neural Networks II CY APR 09-12, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE adaptive control; dynamic modelling; flexible arm; neural control; structure systems C1 USAF,PHILLIPS LAB,STRUCT & CONTROLS DIV,KIRTLAND AFB,NM 87117. NR 0 TC 0 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2141-3 J9 P SOC PHOTO-OPT INS PY 1996 VL 2760 BP 273 EP 283 DI 10.1117/12.235919 PG 11 WC Computer Science, Artificial Intelligence; Optics; Physics, Applied SC Computer Science; Optics; Physics GA BF31U UT WOS:A1996BF31U00027 ER PT B AU Polakowski, WE Rogers, SK Ruck, MDW Raines, RA Hoffmeister, JW AF Polakowski, WE Rogers, SK Ruck, MDW Raines, RA Hoffmeister, JW BE Rogers, SK Ruck, DW TI Derivative-based feature saliency for computer-aided breast cancer detection and diagnosis SO APPLICATIONS AND SCIENCE OF ARTIFICIAL NEURAL NETWORKS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT SPIE International Conference on Applications and Science of Artificial Neural Networks II CY APR 09-12, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 USAF,INST TECHNOL,ENG,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2141-3 J9 P SOC PHOTO-OPT INS PY 1996 VL 2760 BP 312 EP 323 DI 10.1117/12.235922 PG 12 WC Computer Science, Artificial Intelligence; Optics; Physics, Applied SC Computer Science; Optics; Physics GA BF31U UT WOS:A1996BF31U00031 ER PT B AU Brandstrom, GW Ruck, DW Rogers, S Stribling, B AF Brandstrom, GW Ruck, DW Rogers, S Stribling, B BE Rogers, SK Ruck, DW TI Space object identification - Using spatio-temporal pattern recognition SO APPLICATIONS AND SCIENCE OF ARTIFICIAL NEURAL NETWORKS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT SPIE International Conference on Applications and Science of Artificial Neural Networks II CY APR 09-12, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers C1 USAF,INST TECHNOL,DEPT ELECT ENGN,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 2 Z9 2 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2141-3 J9 P SOC PHOTO-OPT INS PY 1996 VL 2760 BP 475 EP 486 DI 10.1117/12.235937 PG 12 WC Computer Science, Artificial Intelligence; Optics; Physics, Applied SC Computer Science; Optics; Physics GA BF31U UT WOS:A1996BF31U00048 ER PT J AU Xia, XG Suter, BW AF Xia, XG Suter, BW TI Construction of Malvar wavelets on hexagons SO APPLIED AND COMPUTATIONAL HARMONIC ANALYSIS LA English DT Article AB In this paper, we construct two-dimensional continuous (smooth) Malvar wavelets defined on a hexagon A, which constitute an orthonormal basis of L(2)(A). The method can be generalized to many hexagons. (C) 1996 Academic Press, Inc. C1 USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433. NR 17 TC 4 Z9 4 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 1063-5203 J9 APPL COMPUT HARMON A JI Appl. Comput. Harmon. Anal. PD JAN PY 1996 VL 3 IS 1 BP 65 EP 71 DI 10.1006/acha.1996.0005 PG 7 WC Mathematics, Applied; Physics, Mathematical SC Mathematics; Physics GA TZ588 UT WOS:A1996TZ58800005 ER PT J AU Dierking, MP Karim, MA AF Dierking, MP Karim, MA TI Solid-block stationary Fourier-transform spectrometer SO APPLIED OPTICS LA English DT Article DE Fourier-transform spectrometer; stationary interferometer; common-path interferometer; interferometry ID PHOTODIODE ARRAY AB A solid-block stationary Fourier-transform spectrometer (SBSFTS) is described that is applicable to a wide range of portable, moderate-resolution instrumentation needs that include the detection of temporally variant signatures. The SBSFTS is a low-cost, extremely rugged stationary Fourier-transform spectrometer based on the combination of three standard prism types. The SBSFTS uses a source-doubling, square-and-triangle common-path topology that is mechanically rugged, simple to align, and virtually immune to alignment perturbation. Its alignment stability makes it suitable for use in a variety of hostile operating environments. When coupled to a fiber-optic input, the spectrometer can be constructed in an extremely compact form. Experimental results have demonstrated the design and the performance of the spectrometer. C1 UNIV DAYTON,DEPT ELECT ENGN,DAYTON,OH 45469. RP Dierking, MP (reprint author), USAF,MAT COMMAND,WRIGHT LAB,AAWP,LASER SENSOR TECHNOL LAB,HANGAR 4B,3050 C STR,WRIGHT PATTERSON AFB,OH 45433, USA. NR 14 TC 10 Z9 12 U1 1 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD JAN 1 PY 1996 VL 35 IS 1 BP 84 EP 89 DI 10.1364/AO.35.000084 PG 6 WC Optics SC Optics GA TR773 UT WOS:A1996TR77300011 PM 21068981 ER PT S AU Hall, CD AF Hall, CD BE Alfriend, KT Ross, IM Misra, AK Peters, CF TI Parametric excitation of two-rotor gyrostats with damping SO ASTRODYNAMICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Astrodynamics Conference CY FEB 14-17, 1995 CL HALIFAX, CANADA SP Amer Astron Soc, Amer Inst Aeronaut & Astronaut C1 USAF,ENY,DEPT AERONAUT & ASTRONAUT,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-407-9 J9 ADV ASTRONAUT SCI PY 1996 VL 90 BP 539 EP 554 PN 1&2 PG 16 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BF21S UT WOS:A1996BF21S00035 ER PT S AU Boelitz, CA AF Boelitz, CA BE Alfriend, KT Ross, IM Misra, AK Peters, CF TI Orbit analysis software survey SO ASTRODYNAMICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Astrodynamics Conference CY FEB 14-17, 1995 CL HALIFAX, CANADA SP Amer Astron Soc, Amer Inst Aeronaut & Astronaut C1 USAF,PHILLIPS LAB,DIV ASTRODYNAM,KIRTLAND AFB,NM 87117. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-407-9 J9 ADV ASTRONAUT SCI PY 1996 VL 90 BP 749 EP 767 PN 1&2 PG 19 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BF21S UT WOS:A1996BF21S00049 ER PT S AU Young, RP Smith, ME AF Young, RP Smith, ME BE Alfriend, KT Ross, IM Misra, AK Peters, CF TI The evaluation of debris bumper systems using the counter-fire test technique SO ASTRODYNAMICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Astrodynamics Conference CY FEB 14-17, 1995 CL HALIFAX, CANADA SP Amer Astron Soc, Amer Inst Aeronaut & Astronaut C1 MICRO CRAFT TECHNOL,AEDC OPERAT,ARNOLD ENGN & DEV CTR,ARNOLD AFB,TN 37389. NR 0 TC 1 Z9 1 U1 0 U2 0 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-407-9 J9 ADV ASTRONAUT SCI PY 1996 VL 90 BP 781 EP 789 PN 1&2 PG 9 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BF21S UT WOS:A1996BF21S00051 ER PT S AU Carter, SS Cefola, PJ Proulx, RJ AF Carter, SS Cefola, PJ Proulx, RJ BE Alfriend, KT Ross, IM Misra, AK Peters, CF TI The determination of precision mean element sets from GPS receiver on-board navigation solutions SO ASTRODYNAMICS 1995 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/AIAA Astrodynamics Conference CY FEB 14-17, 1995 CL HALIFAX, CANADA SP Amer Astron Soc, Amer Inst Aeronaut & Astronaut C1 USAF,WASHINGTON,DC 20330. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-407-9 J9 ADV ASTRONAUT SCI PY 1996 VL 90 BP 1203 EP 1223 PN 1&2 PG 21 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA BF21S UT WOS:A1996BF21S00076 ER PT B AU Wilson, TA Rogers, SK Broussard, RP Rathbun, TF AF Wilson, TA Rogers, SK Broussard, RP Rathbun, TF BE Sadjadi, FA TI Fusion of focus of attention alternatives for FLIR imagery SO AUTOMATIC OBJECT RECOGNITION VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 6th International Conference on Automatic Object Recognition CY APR 09-10, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE model based ATC/R; focus of attention; wavelets; pulse coupled neural networks; fusion; genetic algorithms C1 USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2137-5 J9 P SOC PHOTO-OPT INS PY 1996 VL 2756 BP 76 EP 86 DI 10.1117/12.241135 PG 11 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BF76S UT WOS:A1996BF76S00008 ER PT B AU Allred, LG Harames, JP Serpen, G AF Allred, LG Harames, JP Serpen, G GP IEEE TI Data collection and recording guidelines for achieving intelligent diagnostics SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 TIS,SOFTWARE ENGN DIV,HILL AFB,UT. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 129 EP 134 DI 10.1109/AUTEST.1996.547687 PG 6 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00019 ER PT B AU Allred, LG Kelly, PB Harames, JP AF Allred, LG Kelly, PB Harames, JP GP IEEE TI Automated experimental design for automatic test equipment software SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 TIS,SOFTWARE ENGN DIV,HILL AFB,UT. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 156 EP 159 DI 10.1109/AUTEST.1996.547690 PG 4 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00022 ER PT B AU Stephenson, M Lynch, T Walters, S AF Stephenson, M Lynch, T Walters, S GP IEEE TI Using advanced tools to automate the design, generation and execution of formal qualification testing SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 WRIGHT PATTERSON AFB,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 1 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 160 EP 165 DI 10.1109/AUTEST.1996.547691 PG 6 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00023 ER PT B AU Roosendaal, K AF Roosendaal, K GP IEEE TI VXI based solutions for flight controls test and simulation SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 OGDEN AIR LOGIST CTR,AVION INTERMEDIATE SUPPORT,HILL AFB,UT 84056. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 272 EP 276 DI 10.1109/AUTEST.1996.547709 PG 5 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00041 ER PT B AU Kirkland, LV Wright, RG AF Kirkland, LV Wright, RG GP IEEE TI The neural engineering of ATE SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 OO ALC,TISAC,HILL AFB,UT 84056. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 292 EP 297 DI 10.1109/AUTEST.1996.547712 PG 6 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00044 ER PT B AU Kirkland, LV Wright, RG AF Kirkland, LV Wright, RG GP IEEE TI Using neural networks to solve testing problems SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 USAF,OO ALC,TISAC,HILL AFB,UT 84056. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 298 EP 302 DI 10.1109/AUTEST.1996.547716 PG 5 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00045 ER PT B AU Dean, JS AF Dean, JS GP IEEE TI Artificial intelligence in test SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 LDAE,SA ALC,ADV DIAGNOST & TECHNOL INSERT CTR,KELLY AFB,TX 78241. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 309 EP 313 DI 10.1109/AUTEST.1996.547718 PG 5 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00047 ER PT B AU Allred, LG Harames, JP AF Allred, LG Harames, JP GP IEEE TI Guidelines for successful implementation of infrared thermography for repairing electronic circuit cards SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 SOFTWARE ENGN DIV,TIS,HILL AFB,UT. NR 0 TC 1 Z9 2 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 410 EP 417 PG 8 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00063 ER PT B AU Allred, LG Howard, TR AF Allred, LG Howard, TR GP IEEE TI Thermal imaging is the sole basis for repairing circuit cards in the F-16 flight control panel SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 OGDEN AIR LOGIST CTR,SOFTWARE ENGN DIV,TIS,HILL AFB,UT. NR 0 TC 3 Z9 4 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 418 EP 424 DI 10.1109/AUTEST.1996.547734 PG 7 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00064 ER PT B AU Allred, LG Oliverio, C Cain, MJ AF Allred, LG Oliverio, C Cain, MJ GP IEEE TI Proposed software standards for control and sequencing of automatic test equipment SO AUTOTESTCON '96 - THE SYSTEM READINESS TECHNOLOGY CONFERENCE: TEST TECHNOLOGY AND COMMERCIALIZATION, CONFERENCE RECORD LA English DT Proceedings Paper CT 32nd Annual AUTOTESTCON - Test Technology and Commercialization (AUTOTESTCON 96) CY SEP 16-19, 1996 CL DAYTON, OH SP IEEE, Aerosp & Electr Syst Soc, IEEE, Instrumentat & Measurement Soc C1 SOFTWARE ENGN DIV,TIS,HILL AFB,UT. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3380-2 PY 1996 BP 425 EP 428 DI 10.1109/AUTEST.1996.547735 PG 4 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BG39P UT WOS:A1996BG39P00065 ER PT J AU Barker, JM Clothier, CC Woody, JR McKinney, EH Brown, JL AF Barker, JM Clothier, CC Woody, JR McKinney, EH Brown, JL TI Crew resource management: A simulator study comparing fixed versus formed aircrews SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article AB Background: Most airline and military transport planes are flown by crews that have been teamed together for a short amount of time before disbanding and becoming part of a different crew (formed crew concept). Some military operations use a fixed crew concept, pairing crewmembers together for an indefinite period. This research investigated the effect of crew formation policy on aircrew performance during missions in U.S. Air Force KC-135 (tanker) simulators. Method: The performance of fixed aircrews is compared to formed aircrews flying the same simulator mission scenario, which included an in-flight emergency. Cockpit resource management (CRM) behavioral data and error data were collected by trained observers for 17 crews (9 fixed and 8 formed). Results: The results show that fixed crews committed more minor errors (4.4 per mission) than formed crews (2.6 per mission), t(14) = 2.32, p = 0.036. No differences were found concerning major errors or CRM behavioral indicators. Conclusions: The results suggest the possibility of a ''familiarity decline,'' where aircrew performance declines when crewmembers become too familiar with each other and may affect flight safety. C1 USAF ACAD,DEPT BEHAV SCI,COLORADO SPRINGS,CO 80840. USAF ACAD,DEPT LEADERSHIP & MANAGEMENT,COLORADO SPRINGS,CO 80840. NR 9 TC 5 Z9 5 U1 1 U2 5 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD JAN PY 1996 VL 67 IS 1 BP 3 EP 7 PG 5 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TP715 UT WOS:A1996TP71500002 PM 8929198 ER PT J AU Flynn, CF McGlohn, S Miles, RE AF Flynn, CF McGlohn, S Miles, RE TI Occupational outcome in military aviators after psychiatric hospitalization SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID DEPRESSION AB Objective: To determine if psychiatric hospitalization precluded a return to occupational status in United States Air Force aviators. Design: A 7-yr retrospective review that joined hospitalization and occupational databases using individual identifiers. Subjects: From a population of over 35,000 USAF rated aviation officers present between January 1986 and December 1990, 214 were both psychiatrically hospitalized and on flying status the quarter prior. Primary Outcome Measure: Return to flying duties during a minimum follow-up period of 2 yr. Results: Within 2 yr from psychiatric admission, 138 (64.5%) aviators returned to flying status; 141 (65.9%) returned over 7 yr. In this patient population, an affective disorder diagnosis predicted poor outcome (chi(2) = 12.86; df = 1; p = 0.0003), independent of length of hospitalization. Conclusion: Psychiatric hospitalization did not prevent a return to flying status for a majority of these high functioning aviators. Although an affective disorder diagnosis negatively affected occupational outcome, it is unclear whether institutional policy or poor prognosis was etiologic. C1 USAF,ARMSTRONG LAB,AEROSP MED DIRECTORATE,WASHINGTON,DC 20330. USAF,AEROMED CONSULTAT SERV,NEUROPSYCHIAT BRANCH,WASHINGTON,DC 20330. USAF,CTR ENVIRONM EXCELLENCE,WASHINGTON,DC 20330. NR 24 TC 3 Z9 5 U1 0 U2 0 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD JAN PY 1996 VL 67 IS 1 BP 8 EP 13 PG 6 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TP715 UT WOS:A1996TP71500003 PM 8929210 ER PT J AU Balldin, UI Krock, LP Hopper, NL Squires, WG AF Balldin, UI Krock, LP Hopper, NL Squires, WG TI Cerebral artery blood flow velocity changes following rapid release of lower body negative pressure SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article ID GZ-INDUCED LOSS; CONSCIOUSNESS AB Background: Circulatory changes occur during exposure to Lower Body Negative Pressure (LBNP). These changes may have some similarities to exposure to moderately and slowly increased C-loads in a relaxed subject without anti-G suit. Hypothesis: Changes will also occur in cerebral blood circulation during a rapid release of LBNP. Methods: Transcranial Doppler ultrasound (TCD) was used to measure middle cerebral artery bled flow velocity (CBFV) in 14 human subjects following rapid release of a ramped lower body negative pressure (LBNP) (0.33 mm Hg . s) to presyncope (mean peak negative pressure of -124 mm Hg). Results: The mean CBFV decreased to an average of 60% (p < 0.05) of the baseline value at peak LBNP. Mean CBFV was still decreased to 65% and 84% of the baseline value (p < 0.05) at the third heart beat and 30 s, respectively, after pressure release. The systolic CBFV decreased similarly to 57% (p < 0.05) of baseline during peak LBNP, and was still 63% (p < 0.05) at the third heart beat after pressure release. Heart rate increased by a mean of 51% (p < 0.001) and systolic heart level blood pressure decreased by 28% (p < 0.001) during peak negative pressure. Both heart rate and blood pressure returned to baseline levels within 30 s after pressure release. Conclusions: Following a presyncopal LBNP, the CBFV is not fully restored up to 30 s after the release of the negative pressure. This delayed returning of cerebral circulation following orthostatic stress may have some similarities to what occurs after the release of a gradual onset G-load in a relaxed subject without anti-G suit. C1 NATL DEF RES ESTAB,STOCKHOLM,SWEDEN. TEXAS LUTHERAN COLL,APPL PHYSIOL LAB,SEGUIN,TX. RP Balldin, UI (reprint author), ARMSTRONG LAB,CFTF,2504 GAILLINGHAM DR,SUITE 1,BROOKS AFB,TX 78235, USA. NR 21 TC 9 Z9 13 U1 0 U2 0 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD JAN PY 1996 VL 67 IS 1 BP 19 EP 22 PG 4 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TP715 UT WOS:A1996TP71500005 PM 8929196 ER PT J AU Rudge, FW AF Rudge, FW TI Cases from the aerospace medicine residents' teaching file, #64 SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Review ID DYSGEUSIA AB A pilot presented with a 2-month history of dysgeusia following treatment for sinusitis. This was accompanied by a 30-lb weight loss due to the abnormal taste of most foods. An extensive evaluation failed to demonstrate a cause for the malady. The clinical course and diagnostic evaluation were consistent with a diagnosis of idiopathic dysgeusia. The clinical presentation, evaluation, and diagnosis of a pilot with dysgeusia are discussed. RP Rudge, FW (reprint author), USAF,SCH AEROSP MED,BROOKS AFB,TX 78235, USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD JAN PY 1996 VL 67 IS 1 BP 81 EP 82 PG 2 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TP715 UT WOS:A1996TP71500018 PM 8929211 ER PT J AU Vermillion, CL AF Vermillion, CL TI Operation just cause SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Editorial Material RP Vermillion, CL (reprint author), USAF,NC,5915 WOODRIDGE OAKS,SAN ANTONIO,TX 78249, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD JAN PY 1996 VL 67 IS 1 BP 87 EP 88 PG 2 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA TP715 UT WOS:A1996TP71500019 PM 8929213 ER PT S AU Cooper, TM Cline, SM Zelmon, DE Vuppuladhadium, R DasGupta, S Ramabadran, UB AF Cooper, TM Cline, SM Zelmon, DE Vuppuladhadium, R DasGupta, S Ramabadran, UB BE Coltrain, BK Sanchez, C Schaefer, DW Wilkes, GL TI Investigation of second harmonic generation in glutamic acid-metal complexes SO BETTER CERAMICS THROUGH CHEMISTRY VII: ORGANIC/INORGANIC HYBRID MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT 7th MRS Symposium on Better Ceramics Through Chemistry CY APR 08-12, 1996 CL SAN FRANCISCO, CA SP Mat Res Soc C1 USAF,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 1 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-338-X J9 MATER RES SOC SYMP P PY 1996 VL 435 BP 655 EP 659 PG 3 WC Materials Science, Ceramics SC Materials Science GA BG55A UT WOS:A1996BG55A00090 ER PT J AU Yaszemski, MJ Payne, RG Hayes, WC Langer, R Mikos, AG AF Yaszemski, MJ Payne, RG Hayes, WC Langer, R Mikos, AG TI Evolution of bone transplantation: Molecular, cellular and tissue strategies to engineer human bone SO BIOMATERIALS LA English DT Article DE tissue engineering; bone regeneration; bone transplantation; degradable polymers ID MORPHOGENETIC PROTEIN; CANCELLOUS BONE; REGENERATION; COMPOSITE; DEFECTS; OSTEOGENIN; BIOLOGY; SYSTEMS; CEMENT; RATS AB Bone defects occur in a wide variety of clinical situations, and their reconstruction to provide mechanical integrity to the skeleton is a necessary step in the patient's rehabilitation. The current gold standard for bone reconstruction, the autogenous bone graft, works well in many circumstances. However, autograft reconstruction, along with the available alternatives of allogenous bone graft or poly(methylmethacrylate) bone cement, do not solve all instances of bone deficiency. Novel materials, cellular transplantation and bioactive molecule delivery are being explored alone and in various combinations to address the problem of bone deficiency. The goal of these strategies is to exploit the body's natural ability to repair injured bone with new bone tissue, and to then remodel that new bone in response to the local stresses it experiences. In general, the strategies discussed in this paper attempt to provide the reconstructed region with appropriate initial mechanical properties, encourage new bone to form in the region, and then gradually degrade to allow the new bone to remodel and assume the mechanical support function. Several of the concepts presented below are already finding clinical applications in early patient trials. C1 MIT, DEPT CHEM ENGN, CAMBRIDGE, MA 02139 USA. RICE UNIV, DEPT CHEM ENGN, INST BIOSCI & BIOENGN, HOUSTON, TX 77251 USA. HARVARD UNIV, BETH ISRAEL HOSP, SCH MED, ORTHOPAED BIOMECH LAB, BOSTON, MA USA. RP Yaszemski, MJ (reprint author), WILFORD HALL USAF MED CTR, PSSB, DEPT ORTHOPAED SURG, 2200 BERGQUIST DR, SUITE 1, LACKLAND AFB, TX 78236 USA. NR 74 TC 477 Z9 494 U1 4 U2 81 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0142-9612 J9 BIOMATERIALS JI Biomaterials PD JAN PY 1996 VL 17 IS 2 BP 175 EP 185 DI 10.1016/0142-9612(96)85762-0 PG 11 WC Engineering, Biomedical; Materials Science, Biomaterials SC Engineering; Materials Science GA TY458 UT WOS:A1996TY45800011 PM 8624394 ER PT S AU Wright, MLC Gelish, CA AF Wright, MLC Gelish, CA BE Lemke, HU Vannier, MW Inamura, K Farman, AG TI Misadventure via tele-medicine; How to lose a liability lawsuit in one easy lesson SO CAR '96: COMPUTER ASSISTED RADIOLOGY SE INTERNATIONAL CONGRESS SERIES LA English DT Proceedings Paper CT International Symposium on Computer and Communication Systems for Image Guided Diagnosis and Therapy (CAR 96) CY JUN, 1996 CL PARIS, FRANCE RP Wright, MLC (reprint author), MENTAL HLTH CLIN,MED GRP 15,755 SCOTT CIRCLE,HICKAM AFB,HI 96853, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE PUBL B V PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0531-5131 BN 0-444-82497-9 J9 INT CONGR SER PY 1996 VL 1124 BP 599 EP 604 PG 6 WC Engineering, Biomedical; Medical Informatics; Radiology, Nuclear Medicine & Medical Imaging SC Engineering; Medical Informatics; Radiology, Nuclear Medicine & Medical Imaging GA BG22F UT WOS:A1996BG22F00106 ER PT B AU Medina, DF Serna, PJ Allahdadi, FA AF Medina, DF Serna, PJ Allahdadi, FA BE Maclay, TD Allahdadi, FA TI Reconstruction of a hypervelocity impact event in space SO CHARACTERISTICS AND CONSEQUENCES OF ORBITAL DEBRIS AND NATURAL SPACE IMPACTORS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Characteristics and Consequences of Orbital Debris and Natural Space Impactors CY AUG 08-09, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers, N Amer Remote Sensing Ind Assoc, Amer Soc Photogrammetry & Remote Sensing DE impact flash; meteoroids; optical sensors; hypervelocity impact; Van De Graaf accelerator; sun shades; hydrocode AB This report describes an investigation with the objective of substantiating the current hypothesis that describes the source of continually recurring space borne optical sensor readings of unknown origin received from several monitoring satellites. These unidentified optical signals have several characteristics such as long duration, short rise time, and magnitude, which do not correspond to expected signals. Up to now, the limited qualitative evidence indicates the possibility of micro-particle impact induced signals. A quantitative investigation is presented from laboratory experiments and numerical analysis which further support this hypothesis. Sources that can be definitely eliminated include signals from lightning, solar compensation, platform motion, or NUDET. Additionally, it can be concluded from several pieces of evidence that the source is local to the satellite. We can also eliminate the possibility of a hardware anomaly of a specific sensor design since data from 1988 to the present are being detected by each of the different types of optical sensors used (3 satellite platforms and 5 different optical sensor designs are involved). Therefore, it is believed that these signals are a consequence of some real, external physical phenomenon and not just a consequence of some anomalous sensor behavior. The current evidence is not a sufficient basis for a complete description of the phenomenology and needs to be studied in greater detail to verify whether or not hypervelocity particle impact is indeed the source of the optical triggers described above, and if so, to work out the phenomenology in quantifiable terms. To substantiate the hypothesis of a HV particle impact source for these signals, the physical phenomenon was reconstructed both experimentally and computationally. Detailed numerical calculations representing the interaction of a specific particle size and velocity were conducted. The intensity of the impact flash is inferred based on temperatures using a black body radiation assumption. Laboratory experiments consisted of HV impacts of iron particles onto a lens specimen and sunshade specimen using a 2MV Van De Graaf accelerator. Results of the experimental data obtained using a photomultiplier are compared to the numerical calculations and with existing data. RP Medina, DF (reprint author), USAF,PHILLIPS LAB,SATELLITE ASSESSMENT DIV,WSA,KIRTLAND AFB,NM 87117, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2201-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2813 BP 137 EP 147 DI 10.1117/12.256056 PG 11 WC Remote Sensing; Optics SC Remote Sensing; Optics GA BG73A UT WOS:A1996BG73A00013 ER PT B AU Hale, ZM Poland, L White, WR Sanders, G MacManus, S AF Hale, ZM Poland, L White, WR Sanders, G MacManus, S BE Lieberman, RA TI An optimized fluorescent-based waveguide: Design parameters for the single mode tapered optical fiber loop for chemical sensing SO CHEMICAL, BIOCHEMICAL, AND ENVIRONMENTAL FIBER SENSORS VIII SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Chemical, Biochemical, and Environmental Fiber Sensors VIII CY AUG 06-07, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE optical fiber sensing; chemical sensing; single mode fibers; tapered fibers; adiabatic tapers; beam propagation method AB Previous work has discovered that the silanization of material onto a tapered single mode fiber can form a new effective waveguide that is optimized for capture of fluorescent energy. Such a system actually generates fluorescent energy captured into a fluorescent mode. The adiabatic nature of the taper allows this energy to be efficiently coupled into the fiber fundamental mode, and propagated to the detector end of the sensor. Approaches to determine the optimal design of the tapered fiber loop are considered, both from a fabrication standpoint and theoretical analyses. RP Hale, ZM (reprint author), USAF ACAD,DEPT ELECT ENGN,COLORADO SPRINGS,CO 80840, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2224-X J9 P SOC PHOTO-OPT INS PY 1996 VL 2836 BP 16 EP 25 DI 10.1117/12.260608 PG 10 WC Engineering, Electrical & Electronic; Optics SC Engineering; Optics GA BG93V UT WOS:A1996BG93V00003 ER PT B AU Kim, YW Dimiduk, DM AF Kim, YW Dimiduk, DM BE Chan, KS TI Deformation and fracture behavior in TiAl alloys under monotonic and cyclic loading conditions SO CLEAVAGE FRACTURE LA English DT Proceedings Paper CT George R Irwin Symposium on Cleavage Fracture at the 1997 TMS Fall Meeting CY SEP 15-17, 1997 CL INDIANAPOLIS, IN SP TMS SMD Mech Met Comm, ASM MSD Flow & Fracture Comm, ASM MSD Comp Simulat Comm AB Deformation and fracture behavior of two-phase TiAl alloys was investigated under monotonic as well as cyclic tension loading conditions for duplex and lamellar microstructural forms. The Hall-Perch relationship with an abnormally high constant in fully-lamellar material is explained as a combined function of grain-size and deformation-anisotropy characteristic of the lamellar structure. The effects of microstructure on the behavior are compared and analyzed for deformation temperatures below and above the brittle-ductile transition (BDT). The crack initiation toughness and associated strains near the crack tip are used to explain the inverse relationship between ductility and toughness observed at RT. The effect of temperature on the transition of cleavage-type transgranular fracture to intergranular and/or interlamellar fracture is discussed, along with the boundary weakening which is enhanced with increasing strain rate. The competition between the effects of grain size, lamellar spacing and plastic zone size on tensile and toughness properties is discussed. C1 USAF, Wright Lab, Mat Directorate, Wright Patterson AFB, OH 45433 USA. RP Kim, YW (reprint author), USAF, Wright Lab, Mat Directorate, Wright Patterson AFB, OH 45433 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086-7514 USA BN 0-87339-381-3 PY 1996 BP 305 EP 317 PG 13 WC Mechanics; Metallurgy & Metallurgical Engineering SC Mechanics; Metallurgy & Metallurgical Engineering GA BK32U UT WOS:000071823000024 ER PT J AU Murray, PM Cooney, WP AF Murray, PM Cooney, WP TI Golf-induced injuries of the wrist SO CLINICS IN SPORTS MEDICINE LA English DT Article ID HAMATE; HOOK; FRACTURE; HAND AB Golf injuries of the wrist are rare, but when they occur they can be devastating to the golfer, as the hand and wrist are so integral to the game. The majority of golf injuries are overuse injuries of the wrist flexor or extensor tendons. This article discusses the wrist biomechanics of the golf swing, as well as the diagnosis and treatment of various overuse injuries, including de Quervain's disease and extensor carpi ulnaris tendinitis. C1 MAYO CLIN & MAYO FDN,ROCHESTER,MN 55905. WILFORD HALL USAF MED CTR,ORTHOPED HAND SURG SERV,LACKLAND AFB,TX 78236. MAYO CLIN & MAYO GRAD SCH MED,ROCHESTER,MN. NR 45 TC 26 Z9 26 U1 0 U2 5 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0278-5919 J9 CLIN SPORT MED JI Clin. Sports Med. PD JAN PY 1996 VL 15 IS 1 BP 85 EP & PG 26 WC Sport Sciences SC Sport Sciences GA TR185 UT WOS:A1996TR18500008 PM 8903711 ER PT B AU Solz, TJ Reising, JM Barry, TP Hartsock, DC AF Solz, TJ Reising, JM Barry, TP Hartsock, DC BE Hopper, DG TI Voice and aided hand trackers to designate targets in 3-D space SO COCKPIT DISPLAYS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Cockpit Displays III CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE target designation; cursor control; cursor aiding algorithms; voice recognition system; hand tracker; target-to-noise ratios C1 USAF,WRIGHT LAB,ADV COCKPITS BRANCH,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2115-4 J9 P SOC PHOTO-OPT INS PY 1996 VL 2734 BP 2 EP 11 PG 10 WC Computer Science, Cybernetics; Ergonomics; Optics SC Computer Science; Engineering; Optics GA BF76P UT WOS:A1996BF76P00001 ER PT B AU Marticello, DN Hopper, DG AF Marticello, DN Hopper, DG BE Hopper, DG TI Insertion of field emission displays into high performance cockpits SO COCKPIT DISPLAYS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Cockpit Displays III CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE field emission display; flight instrument; multi-function display; avionics; cockpit; military; display; automotive; kiosks for banking and information C1 USAF,WRIGHT LAB,DISPLAYS BRANCH,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2115-4 J9 P SOC PHOTO-OPT INS PY 1996 VL 2734 BP 32 EP 37 PG 6 WC Computer Science, Cybernetics; Ergonomics; Optics SC Computer Science; Engineering; Optics GA BF76P UT WOS:A1996BF76P00004 ER PT B AU Venner, R Daniels, R Hopper, DG AF Venner, R Daniels, R Hopper, DG BE Hopper, DG TI High performance applications of electromechanical displays SO COCKPIT DISPLAYS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Cockpit Displays III CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE electromechanical; display; cockpit; automobile; aircraft; mechanical; trains; buses C1 USAF,WRIGHT LAB,DISPLAYS BRANCH,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2115-4 J9 P SOC PHOTO-OPT INS PY 1996 VL 2734 BP 142 EP 153 DI 10.1117/12.240997 PG 12 WC Computer Science, Cybernetics; Ergonomics; Optics SC Computer Science; Engineering; Optics GA BF76P UT WOS:A1996BF76P00017 ER PT B AU Venner, R Daniels, R Hopper, DG AF Venner, R Daniels, R Hopper, DG BE Hopper, DG TI High performance applications of cathode-ray tubes SO COCKPIT DISPLAYS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Cockpit Displays III CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE cathode-ray tube; cockpit display; mission crewstation; trainer & simulator; image generator; flight instrument; electronic multifunctional displays; head-up and helmet-mounted displays; direct-view and projection displays C1 USAF,WRIGHT LAB,DISPLAYS BRANCH,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2115-4 J9 P SOC PHOTO-OPT INS PY 1996 VL 2734 BP 154 EP 164 DI 10.1117/12.240999 PG 11 WC Computer Science, Cybernetics; Ergonomics; Optics SC Computer Science; Engineering; Optics GA BF76P UT WOS:A1996BF76P00018 ER PT B AU Espo, GA Hopper, DG AF Espo, GA Hopper, DG BE Hopper, DG TI High performance applications of electroluminescent displays SO COCKPIT DISPLAYS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Cockpit Displays III CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE electroluminescent; flat panel displays; military; avionics; automotive; banking and information kiosks; cockpits; battlestations; crewstations; workstations C1 WRIGHT LAB,DISPLAYS BRANCH,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2115-4 J9 P SOC PHOTO-OPT INS PY 1996 VL 2734 BP 165 EP 174 DI 10.1117/12.241000 PG 10 WC Computer Science, Cybernetics; Ergonomics; Optics SC Computer Science; Engineering; Optics GA BF76P UT WOS:A1996BF76P00019 ER PT B AU Saini, GS Hopper, DG AF Saini, GS Hopper, DG BE Hopper, DG TI High-performance applications of light emitting diode displays SO COCKPIT DISPLAYS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Cockpit Displays III CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE flat-panel displays; electroluminescent; flight instruments; cockpit displays; heads-up displays; organic; quantum C1 WRIGHT LAB,DISPLAYS BRANCH,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 2 Z9 2 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2115-4 J9 P SOC PHOTO-OPT INS PY 1996 VL 2734 BP 175 EP 186 DI 10.1117/12.241001 PG 12 WC Computer Science, Cybernetics; Ergonomics; Optics SC Computer Science; Engineering; Optics GA BF76P UT WOS:A1996BF76P00020 ER PT B AU Meyer, FM Harpold, EA Blanton, RB Hopper, DG AF Meyer, FM Harpold, EA Blanton, RB Hopper, DG BE Hopper, DG TI High-performance applications of light valve device displays SO COCKPIT DISPLAYS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Cockpit Displays III CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE displays; light valve; liquid crystal light valve; active matrix liquid crystal display; digital micromirror device; acousto-optic modulator gas-dye laser projector; simulators/trainers; crewstations; battlestations C1 WRIGHT LAB,DISPLAYS BRANCH,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2115-4 J9 P SOC PHOTO-OPT INS PY 1996 VL 2734 BP 187 EP 198 DI 10.1117/12.241002 PG 12 WC Computer Science, Cybernetics; Ergonomics; Optics SC Computer Science; Engineering; Optics GA BF76P UT WOS:A1996BF76P00021 ER PT B AU Michaels, RA Desjardins, DD Daniels, R Hopper, DG AF Michaels, RA Desjardins, DD Daniels, R Hopper, DG BE Hopper, DG TI Applications of AMLCDs in US military cockpits SO COCKPIT DISPLAYS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Cockpit Displays III CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE active matrix liquid crystal display; cockpit; military market; flat panel displays; avionics; vetronics; space shuttle; mission crewstations; test equipment; notebook computers; head mounted displays C1 WRIGHT LAB,DISPLAYS BRANCH,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2115-4 J9 P SOC PHOTO-OPT INS PY 1996 VL 2734 BP 258 EP 267 DI 10.1117/12.241013 PG 10 WC Computer Science, Cybernetics; Ergonomics; Optics SC Computer Science; Engineering; Optics GA BF76P UT WOS:A1996BF76P00029 ER PT B AU Quast, T Marticello, DN AF Quast, T Marticello, DN BE Hopper, DG TI Flat panel display test and evaluation for US military applications SO COCKPIT DISPLAYS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Cockpit Displays III CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE flat panel displays; testing; evaluation; test standards; flight instruments; active matrix liquid crystal displays C1 WRIGHT LAB,DISPLAYS BRANCH,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2115-4 J9 P SOC PHOTO-OPT INS PY 1996 VL 2734 BP 304 EP 310 DI 10.1117/12.241012 PG 7 WC Computer Science, Cybernetics; Ergonomics; Optics SC Computer Science; Engineering; Optics GA BF76P UT WOS:A1996BF76P00034 ER PT B AU Hemmer, PR Katz, DP Shahriar, MS Kumar, P CroninGolomb, M AF Hemmer, PR Katz, DP Shahriar, MS Kumar, P CroninGolomb, M BE Andreev, AV Kocharovskaya, O Mandel, P TI Optical phase conjugation using Raman coherent population trapping SO COHERENT PHENOMENA AND AMPLIFICATION WITHOUT INVERSION - ICONO '95 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT LO/ICONO 95 Conference on Transient Coherent Phenomena, and Atomic Coherence and Amplification Without Inversion CY JUN 27-JUL 01, 1995 CL ST PETERSBURG, RUSSIA SP Russian Acad Sci, Sci Council Coherent & Nonlinear Opt, S I Vavilov State Opt Inst, Res Inst Laser Phys, Russian Acad Sci, Gen Phys Inst, M V Lomonosov Moscow State Univ, Int Laser Ctr, St Petersburg State Univ, Russian Ctr Laser Phys, Soc Photo Opt Instrumentat Engineers, Russia Chapter, Soc Photo Opt Instrumentat Engineers DE coherent population trapping; population trapping; resonance Raman; optical phase conjugation; optical gain; electromagnetically induced transparency; inversionless gain C1 USAF,ROME LAB,BEDFORD,MA 01731. RI Shahriar, Selim/B-7270-2009; Cronin-Golomb, Mark/A-5430-2012 OI Cronin-Golomb, Mark/0000-0002-8936-4358 NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2186-3 J9 P SOC PHOTO-OPT INS PY 1996 VL 2798 BP 272 EP 281 DI 10.1117/12.239482 PG 10 WC Optics SC Optics GA BF67K UT WOS:A1996BF67K00033 ER PT B AU Stricklan, KK Mattzela, RL AF Stricklan, KK Mattzela, RL BE Carlson, RF TI Innovative bioventing system construction/operation in cold regions SO COLD REGIONS ENGINEERING: THE COLD REGIONS INFRASTRUCTURE: AN INTERNATIONAL IMPERATIVE FOR THE 21ST CENTURY LA English DT Proceedings Paper CT 8th International Conference on Cold Regions Engineering - The Cold Regions Infrastructure: An International Imperative for the 21st-Century CY AUG 12-16, 1996 CL UNIV ALASKA FAIRBANKS, FAIRBANKS, AK SP Amer Soc Civil Engineers, Tech Council Cold Regions Engn HO UNIV ALASKA FAIRBANKS AB Air Force installations are wide spread in Alaska, ranging from Elmendorf Air Force Base (AFB) in Anchorage to Eielson AFB in Fairbanks to radar stations along the North Slope. The majority of these installations have environmental contamination from their 50 plus years of operations. By far the most pervasive types of contamination are from hydrocarbons. The Air Force has initiated several different cleanup technologies throughout the installations. This paper will focus on the cold regions engineering aspects of treatment technologies used at several sites. These sites include, but are not limited to, bioventing projects at Elmendorf AFB and a bioventing project at Eielson AFB. RP Stricklan, KK (reprint author), BOOZ ALLEN & HAMILTON INC,9824 L ST,ELMENDORF AFB,AK 99506, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER SOC CIVIL ENGINEERS PI NEW YORK PA UNITED ENGINEERING CENTER, 345 E 47TH ST, NEW YORK, NY 10017-2398 BN 0-7844-0190-X PY 1996 BP 351 EP 359 PG 9 WC Engineering, Environmental; Engineering, Civil; Water Resources SC Engineering; Water Resources GA BG81P UT WOS:A1996BG81P00030 ER PT J AU Porter, DB Eisenhut, SM AF Porter, DB Eisenhut, SM BE VanKollenburg, SE TI Educational outcomes assessment: An integrated approach SO COLLECTION OF PAPERS ON SELF-STUDY AND INSTITUTIONAL IMPROVEMENT 1996 LA English DT Proceedings Paper CT 101st Annual Meeting of the North-Central-Association-of-Colleges-and-Schools - A Collection of Papers on Self-Study and Institutional Improvement CY MAR 23-26, 1996 CL CHICAGO, IL SP N Cent Assoc Coll & Sch, Commiss Inst Higher Educ C1 USAF ACAD,COLORADO SPRINGS,CO 80840. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NORTH CENTRAL ASSOC COLL & SCHCOMMISSION INST HIGHER EDUC PI CHICAGO PA 30 N LASALLE ST SUITE 2400, CHICAGO, IL 60602 PY 1996 BP 167 EP 173 PG 7 WC Education & Educational Research SC Education & Educational Research GA BH91Q UT WOS:A1996BH91Q00035 ER PT J AU Lee, BL Holl, MW AF Lee, BL Holl, MW TI Effects of moisture and thermal cycling on in-plane shear properties of graphite fibre-reinforced cyanate ester resin composites SO COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING LA English DT Article DE cyanate ester resin composites; moisture; thermal cycling; in-plane shear properties; fatigue; strength degradation; matrix/interface cracking ID POLYMER MATRIX COMPOSITES AB The weight change and retention of in-plane shear (+/-45 degrees) strength of graphite fibre-reinforced cyanate ester resin matrix composites have been estimated on exposure to high humidity and thermal cycling, respectively. Cyanate ester resin matrix composites absorbed a remarkably small amount of moisture on exposure to high humidity. However, the degree of moisture absorption underwent a rather sudden increase to a new equilibrium level after prolonged exposure. A morphology study showed the occurrence of extensive cracking in the matrix/interface region in the form of delamination between plies as well as translaminar cracking within plies. The phenomenon is believed to be caused by weakening of the fibre-matrix interface, which was confirmed by microscopic analysis of fracture surfaces. A sudden moisture gain associated with extensive matrix/interface cracking was found to reduce the in-plane shear strength and fatigue lifetime at a given stress amplitude. The slope of the S-N curve was lower for wet specimens, implying a higher growth rate of local cracks as well as delamination. The rate of in-plane shear strength degradation was also measured on static exposure to dry heat as well as after thermal cycling to a peak temperature of 150 or 204 degrees C. At a frequency of 10 min/cycle and for a relatively short duration, the effect of thermal cycling seems to be represented by the cumulative sum of thermal oxidation effects at the peak temperature. Copyright (C) 1996 Elsevier Science Limited C1 USAF,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. RP Lee, BL (reprint author), PENN STATE UNIV,DEPT ENGN SCI & MECH,227 HAMMOND BLDG,UNIVERSITY PK,PA 16802, USA. NR 24 TC 19 Z9 25 U1 3 U2 15 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 1359-835X J9 COMPOS PART A-APPL S JI Compos. Pt. A-Appl. Sci. Manuf. PY 1996 VL 27 IS 11 BP 1015 EP 1022 DI 10.1016/1359-835X(96)00027-9 PG 8 WC Engineering, Manufacturing; Materials Science, Composites SC Engineering; Materials Science GA VM183 UT WOS:A1996VM18300002 ER PT J AU Hu, SF AF Hu, SF TI The transverse failure of a single-fiber metal-matrix composite: Experiment and modeling SO COMPOSITES SCIENCE AND TECHNOLOGY LA English DT Article DE ultrasonic non-destructive evaluation; finite element analysis; titanium-matrix composites; fiber/matrix interfacial debond; transverse loading ID INDUCED RESIDUAL-STRESSES; INTERFACE AB In this work we investigate the fiber/matrix interfacial debond of a single-fiber metal-matrix composite under transverse tensile loading at room temperature. Attention is focused on the interfacial debond initiation and propagation which is reportedly the primary cause for the low tensile strength of the composite in the transverse direction. The ultrasonic imaging technique is used as an experimental tool for investigating the interfacial debond. By using the proposed model of relative signal intensity, we ave able to transform the experimental ultrasonic signal intensity data into data for the progressive interfacial debond under the increased applied stress. A finite element analysis has been performed for idealized interfacial conditions. The correlation between the experimental and finite element results reveals some important mechanisms of interfacial debond initiation and propagation. After initiation, the interfacial debond propagation is nominated by interfacial shear stress. This interfacial shear damage or Mode II fracture is the primary cause of interfacial failure and is detected by the ultrasonic non-destructive method. (C) 1996 Elsevier Science Limited RP Hu, SF (reprint author), USAF,WRIGHT LAB,MLLP,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 19 TC 14 Z9 14 U1 0 U2 4 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0266-3538 J9 COMPOS SCI TECHNOL JI Compos. Sci. Technol. PY 1996 VL 56 IS 6 BP 667 EP 676 DI 10.1016/0266-3538(96)00051-6 PG 10 WC Materials Science, Composites SC Materials Science GA VB643 UT WOS:A1996VB64300006 ER PT J AU Huybrechts, S Tsai, SW AF Huybrechts, S Tsai, SW TI Analysis and behavior of grid structures SO COMPOSITES SCIENCE AND TECHNOLOGY LA English DT Article DE grid structure; isogrid; composite material; structural analysis; failure envelope AB Lattices of rigidly connected ribs, known as grid structures, have many advantages over traditional construction methods, which use panels, sandwich cores and/or expensive frameworks. The introduction of grid structures into industry has been hampered by a lack of understanding of their behavior, especially their behavior in failure space. In order to predict grin structure behavior, a model of grid structure deformation and failure was developed and implemented in a computer cone. With this code, parametric studies were run on a variety of grid structure types and geometries. Studies were performed to determine grid structure strengths, grid structure weaknesses, the effects of empty, soft, hard and rigid inclusions, the effects of missing ribs, the effects of nodal offset, the impact of soft and hard repairs to the grid structure lattice, and the impact of joining grid structures together. Published by Elsevier Science Limited C1 STANFORD UNIV,DEPT AERONAUT & ASTRONAUT,STANFORD,CA 94305. RP Huybrechts, S (reprint author), USAF,PHILLIPS LAB,STRUCT & CONTROLS DIV,KIRTLAND AFB,NM 87117, USA. NR 8 TC 39 Z9 45 U1 1 U2 17 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0266-3538 J9 COMPOS SCI TECHNOL JI Compos. Sci. Technol. PY 1996 VL 56 IS 9 BP 1001 EP 1015 DI 10.1016/0266-3538(96)00063-2 PG 15 WC Materials Science, Composites SC Materials Science GA VR255 UT WOS:A1996VR25500001 ER PT S AU Davis, A Dauplaise, HM Vaccaro, K Demczyk, BG Ramseyer, GO Lorenzo, JP AF Davis, A Dauplaise, HM Vaccaro, K Demczyk, BG Ramseyer, GO Lorenzo, JP BE Shul, RJ Pearton, SJ Ren, F Wu, CS TI Surface stabilization of InP using CdS thin films SO COMPOUND SEMICONDUCTOR ELECTRONICS AND PHOTONICS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Compound Semiconductor Electronics and Photonics CY APR 08-10, 1996 CL SAN FRANCISCO, CA SP USA, Res Off, Bell Labs, Lucent Technol, Sandia Natl Labs, Texas Instruments C1 USAF,ROME LAB,OPT COMPONENTS BRANCH,BEDFORD,MA 01731. NR 0 TC 1 Z9 1 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-324-X J9 MATER RES SOC SYMP P PY 1996 VL 421 BP 99 EP 104 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA BG51U UT WOS:A1996BG51U00013 ER PT S AU Johnstone, DK Marciniak, MA Yeo, YK Hengehold, RL Turner, GW AF Johnstone, DK Marciniak, MA Yeo, YK Hengehold, RL Turner, GW BE Woo, JC Park, YS TI Electrical and optical characterization of GaSb based diode laser material for 2-4 mu m applications SO COMPOUND SEMICONDUCTORS 1995 SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article; Proceedings Paper CT 22nd International Symposium on Compound Semiconductors - Technologies for Future Electronics and Optoelectronics Industries (ISCS-22) CY AUG 28-SEP 02, 1995 CL CHEJU ISLAND, SOUTH KOREA SP LG Electr Res Ctr, LG Semicon Co Ltd, Samsung Electr, Hyundai Electr Ind Co, Kukje Corp, Electr Div, Sammi Technol & Ind Co Ltd, Korean Air, Korea Res Fdn, Minist Educ, Korea, Minist Sci & Technol, Korea ID MOLECULAR-BEAM EPITAXY; PHOTOLUMINESCENCE; INAS1-XSBX; INAS; ALSB; MBE AB Deep level transient spectroscopy, infrared absorption, or photoluminescence (PL) measurements were made on molecular beam epitaxially grown samples of Ga0.80In0.20As0.12Sb0.88, AlAs0.07Sb0.93, and InAs1-xSbx (0.031 less than or equal to x less than or equal to 0.192) materials used to develop 2-4 mu m quantum well laser structures lattice-matched to GaSb substrates. In addition to five other hole trap levels, a trap with the greatest effect on nonradiative recombination located at 276 meV above the valence band (E(v)) was found in the Ga0.80In0.20As0.12Sb0.88 active region material, A DX-like trap was found in the AlAs0.07Sb0.93 cladding material at E(c)-282 meV. Temperature-dependent absorption measurements made on undoped InAs1-xSbx active region material resulted in the closed-form expression for the energy gap, The measured PL linewidth of the band-to-band transition of InAs1-xSbx is narrower than any previously reported values, indicating the high quality of this material. Furthermore, two shallow impurity levels were resolved at energies 5-7 meV from the band edge. C1 MIT,LINCOLN LAB,LEXINGTON,MA 02173. RP Johnstone, DK (reprint author), USAF,INST TECHNOL,WRIGHT PATTERSON AFB,OH 45433, USA. NR 18 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 BN 0-7503-0342-5 J9 INST PHYS CONF SER PY 1996 VL 145 BP 369 EP 374 PG 6 WC Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BF51P UT WOS:A1996BF51P00066 ER PT S AU Yu, PW Mahalingam, K Mitchel, WC Roth, MD Fischer, DW AF Yu, PW Mahalingam, K Mitchel, WC Roth, MD Fischer, DW BE Woo, JC Park, YS TI Characterization of boron in 6H-SiC using optical absorption SO COMPOUND SEMICONDUCTORS 1995 SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article; Proceedings Paper CT 22nd International Symposium on Compound Semiconductors - Technologies for Future Electronics and Optoelectronics Industries (ISCS-22) CY AUG 28-SEP 02, 1995 CL CHEJU ISLAND, SOUTH KOREA SP LG Electr Res Ctr, LG Semicon Co Ltd, Samsung Electr, Hyundai Electr Ind Co, Kukje Corp, Electr Div, Sammi Technol & Ind Co Ltd, Korean Air, Korea Res Fdn, Minist Educ, Korea, Minist Sci & Technol, Korea ID 6H AB Optical absorption measurements were made in the energy range of similar to 0.41-3.5 eV at temperatures from 14 to 300 K for GH-SIC bulk crystals unintentionally or intentionally doped with boron. The presence of boron is evidenced by two features: (i) the broad photoionization band in the range of 0.5-3.0 eV and (ii) the multiple exciton lines associated with neutral boron in the range of 2.7-3.0 eV. The photo-ionization band was analyzed for the electronic transition from the valence band to the boron level by taking into account the temperature-dependent phonon broadening effect. The analysis yields the optical activation energy E(0) = 1.408 eV and the thermal activation energy E(th) = 0.394 eV, which indicates a large lattice relaxation. The exciton absorption consists of 18 lines with the stronger lines being at 2.791, 2.826, 2.840, 2.862 and 2.889 eV at 14 K. Excellent correlation between the integrated absorption of the two transitions make it possible to obtain the neutral boron concentration of 2x10(18) - 1.2x10(19) cm(-3) for the present experiment. RP Yu, PW (reprint author), USAF,WRIGHT LAB,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433, USA. NR 13 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 BN 0-7503-0342-5 J9 INST PHYS CONF SER PY 1996 VL 145 BP 475 EP 480 PG 6 WC Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BF51P UT WOS:A1996BF51P00086 ER PT S AU Scofield, JD Yeo, YK Hengehold, RL AF Scofield, JD Yeo, YK Hengehold, RL BE Woo, JC Park, YS TI Deep level investigation of bulk and epitaxial 6H-SiC at high temperatures SO COMPOUND SEMICONDUCTORS 1995 SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article; Proceedings Paper CT 22nd International Symposium on Compound Semiconductors - Technologies for Future Electronics and Optoelectronics Industries (ISCS-22) CY AUG 28-SEP 02, 1995 CL CHEJU ISLAND, SOUTH KOREA SP LG Electr Res Ctr, LG Semicon Co Ltd, Samsung Electr, Hyundai Electr Ind Co, Kukje Corp, Electr Div, Sammi Technol & Ind Co Ltd, Korean Air, Korea Res Fdn, Minist Educ, Korea, Minist Sci & Technol, Korea ID SILICON-CARBIDE; TRANSIENT SPECTROSCOPY AB Deep level transient spectroscopy measurements from 20 to 800 K were made on nand p-type sublimation grown bulk SiC and vapor phase epitaxial grown SiC. Several new deep level centers were observed on both the n-type bulk and epitaxial material with ionization energies in the range of 0.58 to 1.4 eV below the conduction band, and on the p-type materials with energies 0.38 to 1.1 eV above the valence band. Field dependency and capture transient measurements on an E(c)-0.63 eV center in the bulk n-type material revealed an anomalous emission process, which is dependent upon the depletion region field strength, and the presence of a thermally activated capture cross section. Secondary ion mass spectrometery measurements of the bulk material revealed the presence of several transition metals and other impurities. C1 WRIGHT LAB,AEROPROPULS & POWER DIRECTORATE,WRIGHT PATTERSON AFB,OH. RP Scofield, JD (reprint author), USAF,INST TECHNOL,WRIGHT PATTERSON AFB,OH 45433, USA. NR 15 TC 1 Z9 1 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 BN 0-7503-0342-5 J9 INST PHYS CONF SER PY 1996 VL 145 BP 511 EP 516 PG 6 WC Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BF51P UT WOS:A1996BF51P00093 ER PT S AU Schuermeyer, F Loehr, JP Sherriff, RE Cerny, C Shur, M AF Schuermeyer, F Loehr, JP Sherriff, RE Cerny, C Shur, M BE Woo, JC Park, YS TI Photoelectric measurements of interband transitions in fully fabricated pseudomorphic high electron mobility transistors SO COMPOUND SEMICONDUCTORS 1995 SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article; Proceedings Paper CT 22nd International Symposium on Compound Semiconductors - Technologies for Future Electronics and Optoelectronics Industries (ISCS-22) CY AUG 28-SEP 02, 1995 CL CHEJU ISLAND, SOUTH KOREA SP LG Electr Res Ctr, LG Semicon Co Ltd, Samsung Electr, Hyundai Electr Ind Co, Kukje Corp, Electr Div, Sammi Technol & Ind Co Ltd, Korean Air, Korea Res Fdn, Minist Educ, Korea, Minist Sci & Technol, Korea ID PHOTOLUMINESCENCE; INP AB We have performed photoelectric emission and conduction (PEG) studies on fully fabricated Al0.24Ga0.76As/In0.22Ga0.78As pseudomorphic HEMTs and have observed interband transitions between quantum-confined states in the channel at room temperature. The separation between transition energies and the bias dependence of the photoconductivity spectra agree well with a simple model that assumes proportionality between the photocurrent and the interband absorption. C1 UNIV VIRGINIA,CHARLOTTESVILLE,VA 22903. RP Schuermeyer, F (reprint author), USAF,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433, USA. NR 15 TC 5 Z9 5 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 BN 0-7503-0342-5 J9 INST PHYS CONF SER PY 1996 VL 145 BP 791 EP 796 PG 6 WC Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BF51P UT WOS:A1996BF51P00143 ER PT S AU Hoff, J Piotrowski, J Bigan, E Razeghi, M Brown, GJ AF Hoff, J Piotrowski, J Bigan, E Razeghi, M Brown, GJ BE Woo, JC Park, YS TI Background limited performance in aluminum-free p-doped quantum well intersubband photodetectors SO COMPOUND SEMICONDUCTORS 1995 SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article; Proceedings Paper CT 22nd International Symposium on Compound Semiconductors - Technologies for Future Electronics and Optoelectronics Industries (ISCS-22) CY AUG 28-SEP 02, 1995 CL CHEJU ISLAND, SOUTH KOREA SP LG Electr Res Ctr, LG Semicon Co Ltd, Samsung Electr, Hyundai Electr Ind Co, Kukje Corp, Electr Div, Sammi Technol & Ind Co Ltd, Korean Air, Korea Res Fdn, Minist Educ, Korea, Minist Sci & Technol, Korea ID SUPERLATTICES AB Background limited infrared photodetection has been achieved up to 100 K at normal incidence with two different Aluminum-free p-type quantum well intersubband photodetectors: one GaAs/Ga0.71In0.29As0.39P0.61 and the other Ga0.25In0.75As0.13P0.87/Ga0.49In0.51P. The samples were grown by low-pressure metalorganic chemical vapor deposition. Both detectors showed extended photoresponse cutoff wavelength over that of similar p-type GaAs/Ga0.49In0.51P quantum well intersubband photodetectors by virtue of reduced valence band barrier heights. In this paper. the relative merits of both approaches are investigated in order to help determine the most appropriate technique for extending the range of photodetection to 8-12 mu m. C1 MLPO,MAT DIRECTORATE,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433. RP Hoff, J (reprint author), NORTHWESTERN UNIV,CTR QUANTUM DEVICES,DEPT ELECT ENGN & COMP SCI,EVANSTON,IL 60208, USA. RI Razeghi, Manijeh/B-7265-2009 NR 9 TC 0 Z9 0 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0951-3248 BN 0-7503-0342-5 J9 INST PHYS CONF SER PY 1996 VL 145 BP 1109 EP 1114 PG 6 WC Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BF51P UT WOS:A1996BF51P00204 ER PT J AU White, G Pooch, V AF White, G Pooch, V TI Cooperating security managers: Distributed intrusion detection systems SO COMPUTERS & SECURITY LA English DT Article DE intrusion detection; audit trail analysis; network security AB Intrusion detection systems have been developed to address the break-in threat posed by ''hackers'' and the misuse threat posed by authorized users. Originally designed to address these threats as they apply to an individual host, the concept was eventually extended to a networked environment. Unfortunately the systems which have been implemented rely heavily on a centralized director or controller which coordinates the intrusion detection functions for the network. As the size of the network grows, the message-passing overhead associated with this approach can quickly saturate the centralized director resulting in performance degradation. This paper describes an approach to intrusion detection which places the intrusion detection responsibility for users on the host which the user first accesses. This approach results in a load leveling for messages across the network and avoids the chokepoint which exists with centralized controllers. The approach described is part of on-going computer security research bring conducted at Texas A&M University. Copyright (C) 1996 Elsevier Science Ltd. C1 TEXAS A&M UNIV,DEPT COMP SCI,COLLEGE STN,TX 77843. RP White, G (reprint author), USAF ACAD,DFCS,COLORADO SPRINGS,CO 80840, USA. RI White, Gregory/K-6481-2013 NR 12 TC 4 Z9 7 U1 0 U2 0 PU ELSEVIER ADVANCED TECHNOLOGY PI OXFORD PA OXFORD FULFILLMENT CENTRE THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0167-4048 J9 COMPUT SECUR JI Comput. Secur. PY 1996 VL 15 IS 5 BP 441 EP 450 DI 10.1016/0167-4048(96)00012-0 PG 10 WC Computer Science, Information Systems SC Computer Science GA VR387 UT WOS:A1996VR38700014 ER PT B AU Agee, FJ AF Agee, FJ GP IEEE TI Current issues in high power microwaves SO CONFERENCE RECORD OF THE 1996 TWENTY-SECOND INTERNATIONAL POWER MODULATOR SYMPOSIUM LA English DT Proceedings Paper CT 22nd International Power Modulator Symposium CY JUN 25-27, 1996 CL BOCA RATON, FL SP USA Res Lab, USA Res Off, Air Force Wright Lab, Sandia Natl Labs, Naval Surface Warfare Ctr, Adv Grp Electron Devices, IEEE Electron Devices Soc AB Technology development in the field of high power microwaves is focused principally in three areas, narrowband sources, ultra-wideband sources,and antennas. This paper reviews the status of activity in each area and discusses challenges for power modulators and pulsers that derive from the work presently in progress. Basic research efforts are presently attempting to overcome barriers to further progress in the use of both narrowband and ultra-wideband technologies. Several classes of narrowband tubes are discussed and the course of present basic research efforts that bear upon them is summarized. Success in advancing the art in the areas discussed has the potential for introducing new commercial and military products for applications as diverse as advanced radars, welding, and waste treatment. RP Agee, FJ (reprint author), USAF,PHILLIPS LAB,3550 ABERDEEN AVE SE,KIRTLAND AFB,NM 87117, USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3077-3 PY 1996 BP 1 EP 4 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BG88Z UT WOS:A1996BG88Z00001 ER PT B AU Davanloo, F Korioth, JL Borovina, DL Krause, RK Collins, CB AF Davanloo, F Korioth, JL Borovina, DL Krause, RK Collins, CB GP IEEE TI Stacked Blumlein pulse generators SO CONFERENCE RECORD OF THE 1996 TWENTY-SECOND INTERNATIONAL POWER MODULATOR SYMPOSIUM LA English DT Proceedings Paper CT 22nd International Power Modulator Symposium CY JUN 25-27, 1996 CL BOCA RATON, FL SP USA Res Lab, USA Res Off, Air Force Wright Lab, Sandia Natl Labs, Naval Surface Warfare Ctr, Adv Grp Electron Devices, IEEE Electron Devices Soc AB Extensive characterization of the stacked Blumlein pulsers has been performed over the past few years. Results indicate that, these devices are capable of producing high-power waveforms with risetimes and repetition rates in the range of 0.2 - 50 ns and 1 - 300 Hz, respectively, using a conventional thyratron, spark gap, or photoconductive switch. This paper reviews the progress made to date in the development of these novel pulsers. It is shown that, with slight design modifications, they can produce waveforms with fast risetimes and a wide range of pulse durations and peak values. An analysis of the behavior of the stacked Blumlein pulsers is given and the results of performance tests are discussed. C1 USAF,PHILLIPS LAB,WSQ,KIRTLAND AFB,NM 87117. USA,CECOM,S&TCD,FT MONMOUTH,NJ 07703. RP Davanloo, F (reprint author), UNIV TEXAS,CTR QUANTUM ELECT,POB 830688,RICHARDSON,TX 75083, USA. NR 0 TC 0 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3077-3 PY 1996 BP 181 EP 185 PG 5 WC Engineering, Electrical & Electronic SC Engineering GA BG88Z UT WOS:A1996BG88Z00045 ER PT B AU OLoughlin, JP Calico, SE Loree, DL AF OLoughlin, JP Calico, SE Loree, DL GP IEEE TI Optimization of adiabatic inverter transformers SO CONFERENCE RECORD OF THE 1996 TWENTY-SECOND INTERNATIONAL POWER MODULATOR SYMPOSIUM LA English DT Proceedings Paper CT 22nd International Power Modulator Symposium CY JUN 25-27, 1996 CL BOCA RATON, FL SP USA Res Lab, USA Res Off, Air Force Wright Lab, Sandia Natl Labs, Naval Surface Warfare Ctr, Adv Grp Electron Devices, IEEE Electron Devices Soc RP OLoughlin, JP (reprint author), USAF,PHILLIPS LAB,PL WS,HERTF,KIRTLAND AFB,NM 87117, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3077-3 PY 1996 BP 218 EP 221 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BG88Z UT WOS:A1996BG88Z00054 ER PT B AU Wojtczuk, S AF Wojtczuk, S GP IEEE TI High-power density (1040 W/kg) GaAs cells for ultralight aircraft SO CONFERENCE RECORD OF THE TWENTY FIFTH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE - 1996 LA English DT Proceedings Paper CT 25th IEEE Photovoltaic Specialists Conference CY MAY 13-17, 1996 CL WASHINGTON, DC SP IEEE, IEEE, Electron Device Soc C1 USAF,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-3167-2 PY 1996 BP 49 EP 52 DI 10.1109/PVSC.1996.563943 PG 4 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Optics SC Engineering; Materials Science; Optics GA BG63B UT WOS:A1996BG63B00009 ER PT B AU Sweet, WD Strickland, JA Hewins, SO AF Sweet, WD Strickland, JA Hewins, SO BE Calabrese, EJ Kostecki, PT Bonazountas, M TI Quality assurance audit of CERCLA risk assessment programs: A US Air Force experience SO CONTAMINATED SOILS, VOL 1 LA English DT Proceedings Paper CT 10th Annual Conference on Contaminated Soils CY 1996 CL UNIV MASSACHUSETTS AMHERST, AMHERST, MA SP 3M, Assoc Environm Hlth Soils, CER Corp, Earth Tech, Environm Sci Serv, New York Dept Environm Conservat, Millipore Corp, NE Util Serv Co, Ogden Environm & Energy Serv, Remediat Technol Inc, Roy F Weston Inc, Texaco Inc, Tyree Org Ltd, United Retek Corp HO UNIV MASSACHUSETTS AMHERST RP Sweet, WD (reprint author), USAF,CTR ENVIRONM EXCELLENCE,BROOKS AFB,TX 78235, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMHERST SCIENTIFIC PUBLISHERS PI AMHERST PA 150 FEARING STREET, AMHERST, MA 01002 BN 1-884940-07-2 PY 1996 BP 307 EP 316 PG 10 WC Engineering, Environmental; Engineering, Chemical; Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology SC Engineering; Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology GA BJ54B UT WOS:A1996BJ54B00024 ER PT B AU Reising, JM Liggett, KK Hartsock, DC AF Reising, JM Liggett, KK Hartsock, DC BE Robertson, SA TI Cognitive compatibility: Advanced display concepts for future aircraft crewstations SO CONTEMPORARY ERGONOMICS 1996 LA English DT Proceedings Paper CT Annual Conference of the Ergonomics-Society CY APR 10-12, 1996 CL UNIV LEICESTER, LEICESTER, ENGLAND SP Univ Leicester, Ergon Soc HO UNIV LEICESTER C1 USAF,WRIGHT LAB,ADV COCKPITS BRANCH,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI LONDON PA 4 JOHN ST, LONDON, ENGLAND WC1N 2ET BN 0-7484-0549-6 PY 1996 BP 25 EP 30 PG 6 WC Ergonomics SC Engineering GA BG22U UT WOS:A1996BG22U00004 ER PT S AU Evwaraye, AO Smith, SR Mitchel, WC AF Evwaraye, AO Smith, SR Mitchel, WC BE Hepp, AF Kumta, PN Sullivan, JJ Fischman, GS Kaloyeros, AE TI Electrical and optical properties of defects in n-type 4H-SiC SO COVALENT CERAMICS III - SCIENCE AND TECHNOLOGY OF NON-OXIDES SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Covalent Ceramics III - Science and Technology of Non-Oxides CY NOV 27-30, 1995 CL BOSTON, MA SP Mat Res Soc C1 WRIGHT LAB,MLPO,MAT DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 1 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-313-4 J9 MATER RES SOC SYMP P PY 1996 VL 410 BP 57 EP 62 PG 4 WC Materials Science, Ceramics SC Materials Science GA BG08P UT WOS:A1996BG08P00008 ER PT B AU Lee, DJ Roggemann, MC Welsh, BM AF Lee, DJ Roggemann, MC Welsh, BM BE Fischer, RE Smith, WJ TI Using wavefront sensor information in image post-processing to improve the resolution of telescopes with small aberrations SO CURRENT DEVELOPMENTS IN OPTICAL DESIGN AND ENGINEERING VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Current Developments in Optical Design and Engineering VI Conference CY AUG 05-07, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE image reconstruction; deconvolution; wavefront sensor; space optics AB Due to mechanical aspects of fabrication, launch, and operational environment, space telescope optics can suffer from unforseen aberrations, detracting from their intended diffraction-limited performance goals. Presented here are the results of a simulation study designed to explore how wavefront aberration information could be used in post-processing to improve the effective resolution of such telescopes. Knowledge of the telescope pupil aberration can be effectively used in a post-processing paradigm referred to as Deconvolution from Wavefront Sensing (DWFS). Simulation results show that even when relatively noisy wavefront sensor information is used on images experiencing up to 10% of a wave root-mean-squared (RMS) of unspecified wavefront error, the signal-to-noise-ratios (SNRs) of the optical transfer function (OTF) can be increased by a factor of 1.5, and RMS OTF phasor angle errors can be approximately cut in half, across a wide range of spatial frequencies. Post-processing consisted of correction of the Fourier phase of the image spectra using information from wavefront sensing, without the use of inverse filtering or adaptive optics compensation. RP Lee, DJ (reprint author), USAF,INST TECHNOL,DEPT ENGN PHYS,2950 P ST,WRIGHT PATTERSON AFB,OH 45433, USA. NR 0 TC 3 Z9 3 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2251-7 J9 P SOC PHOTO-OPT INS PY 1996 VL 2863 BP 42 EP 53 DI 10.1117/12.256253 PG 12 WC Optics SC Optics GA BG67G UT WOS:A1996BG67G00006 ER PT J AU Ruder, CR Dixon, P Mikos, AG Yaszemski, MJ AF Ruder, CR Dixon, P Mikos, AG Yaszemski, MJ TI The growth and phenotypic expression of human osteoblasts SO CYTOTECHNOLOGY LA English DT Article DE biodegradable; bone regeneration; cell culture; human cell osteoblasts; polymers AB The care of patients with a skeletal deficiency currently involves the use of bone graft or a non-biologic material such as a metal or polymer. There are alternate possibilities in development which involve the growth of bone cells (osteoblasts) on degradable polymer scaffolds. These tissue engineering strategies require production of the polymeric scaffold, cellular harvest followed by either ex vivo or in vivo growth of the cells on the scaffold, and exploration of the interaction between the cell and scaffold. Research into these strategies utilizes cells from a variety of species, but clinical applications will likely require human osteoblasts. This study explores the process whereby human osteoblasts are harvested under sterile conditions during joint replacement surgery from normally discarded cancellous bone, transported from the operating room to the lab, and grown in culture. This process is feasible, and the cells express their phenotype via the production of alkaline phosphatase and collagen in culture. C1 RICE UNIV,INST BIOSCI & BIOENGN,HOUSTON,TX 77251. RP Ruder, CR (reprint author), WILFORD HALL USAF MED CTR,DEPT ORTHOPAED SURG,PSSB,220 BERGQUIST DR,SUITE 1,LACKLAND AFB,TX 78236, USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0920-9069 J9 CYTOTECHNOLOGY JI Cytotechnology PY 1996 VL 22 IS 1-3 BP 263 EP 267 DI 10.1007/BF00353947 PG 5 WC Biotechnology & Applied Microbiology; Cell Biology SC Biotechnology & Applied Microbiology; Cell Biology GA WG512 UT WOS:A1996WG51200030 PM 22358937 ER PT J AU Meffert, JJ Deering, KC AF Meffert, JJ Deering, KC TI A naturally occurring ring seborrheic keratosis SO DERMATOLOGY LA English DT Article DE seborrheic keratosis; benign neoplasms; growth factors ID EXPRESSION; CYTOKERATIN C1 WILFORD HALL USAF MED CTR,DEPT DERMATOL,LACKLAND AFB,TX 78236. WILFORD HALL USAF MED CTR,DEPT DERMATOPATHOL,LACKLAND AFB,TX 78236. NR 14 TC 0 Z9 0 U1 0 U2 0 PU KARGER PI BASEL PA ALLSCHWILERSTRASSE 10, CH-4009 BASEL, SWITZERLAND SN 1018-8665 J9 DERMATOLOGY JI Dermatology PY 1996 VL 192 IS 4 BP 383 EP 384 PG 2 WC Dermatology SC Dermatology GA UZ699 UT WOS:A1996UZ69900026 PM 8864384 ER PT J AU Previc, FH AF Previc, FH TI Nonright-handedness, central nervous system and related pathology, and its lateralization: A reformulation and synthesis SO DEVELOPMENTAL NEUROPSYCHOLOGY LA English DT Review ID ATTENTION-DEFICIT DISORDER; DEXAMETHASONE SUPPRESSION TEST; OLIGOANTIGENIC DIET TREATMENT; LEFT-HEMISPHERE DYSFUNCTION; MINOR PHYSICAL ANOMALIES; AUTISTIC-LIKE CONDITIONS; LOCUS COERULEUS SYSTEM; EARLY INFANTILE-AUTISM; EPILEPSY-PRONE RATS; FRAGILE-X-SYNDROME AB A theoretical analysis of the associations between nonright-handedness (NRH) and various neurodevelopmental disorders, psychopathology, and related medical conditions is presented. Fourteen disorders and conditions are reviewed in which elevated NRH has been alleged. Impaired noradrenergic activity and, to a lesser extent, serotonergic dysfunction are common to most of these disorders but are not always associated with elevated NRH. In contrast, dysfunction of the labyrinth, its neural projection areas, or both, apparently exists in all cases involving a proven elevation in NRH, but not in other disorders associated with neurochemical imbalances but normal percentages of right-handedness. It is theorized that inputs from the vestibular system to the locus coeruleus, raphe nucleus, and other brainstem structures are critical to the development of motoric dominance and the lateralization of monoaminergic activity in the central nervous system, whereas the contribution of vestibular dysfunction to overall central nervous system neurochemical imbalances is considerably less significant. RP ARMSTRONG LAB, CFTF, CREW TECHNOL DIV, 2504 GILLINGHAM DR, SUITE 1, BROOKS AFB, TX 78235 USA. NR 485 TC 32 Z9 32 U1 7 U2 9 PU ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD PI ABINGDON PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 8756-5641 EI 1532-6942 J9 DEV NEUROPSYCHOL JI Dev. Neuropsychol. PY 1996 VL 12 IS 4 BP 443 EP 515 PG 73 WC Psychology, Developmental; Psychology; Psychology, Experimental SC Psychology GA VV649 UT WOS:A1996VV64900004 ER PT B AU Arrasmith, WW AF Arrasmith, WW BE Idell, PS Schulz, TJ TI Imaging physics at the Air Force Office of Scientific Research SO DIGITAL IMAGE RECOVERY AND SYNTHESIS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Digital Image Recovery and Synthesis III CY AUG 05-06, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE unconventional imaging; inverse problems; image reconstruction; phase retrieval; adaptive optics C1 USAF,OFF SCI RES NE,WASHINGTON,DC 20332. RI Arrasmith, William/G-6949-2016 OI Arrasmith, William/0000-0002-2917-9775 NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2215-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2827 BP 2 EP 10 DI 10.1117/12.255072 PG 9 WC Optics SC Optics GA BG61T UT WOS:A1996BG61T00001 ER PT B AU Roggemann, MC Whiteley, MR AF Roggemann, MC Whiteley, MR BE Idell, PS Schulz, TJ TI Photon noise limits to the detection of closure phase for interferometric measurements of Earth orbiting satellites SO DIGITAL IMAGE RECOVERY AND SYNTHESIS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Digital Image Recovery and Synthesis III CY AUG 05-06, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers C1 USAF,INST TECHNOL,GRAD SCH ENGN,DEPT ENGN PHYS,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2215-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2827 BP 49 EP 59 DI 10.1117/12.255088 PG 11 WC Optics SC Optics GA BG61T UT WOS:A1996BG61T00005 ER PT B AU Sallberg, SA Welsh, BM Roggemann, MC AF Sallberg, SA Welsh, BM Roggemann, MC BE Idell, PS Schulz, TJ TI Maximum a priori estimation of wavefront slopes using a Hartmann wavefront sensor SO DIGITAL IMAGE RECOVERY AND SYNTHESIS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Digital Image Recovery and Synthesis III CY AUG 05-06, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers DE wave front sensing; adaptive optics; atmospheric optics C1 USAF,INST TECHNOL,DEPT ENGN PHYS,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2215-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2827 BP 68 EP 78 DI 10.1117/12.255090 PG 11 WC Optics SC Optics GA BG61T UT WOS:A1996BG61T00007 ER PT B AU Gonglewski, JD Highland, RG Dayton, DC Sandven, SS Rogers, SC Browne, SL AF Gonglewski, JD Highland, RG Dayton, DC Sandven, SS Rogers, SC Browne, SL BE Idell, PS Schulz, TJ TI ADONIS: Daylight imaging through atmospheric turbulence SO DIGITAL IMAGE RECOVERY AND SYNTHESIS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Digital Image Recovery and Synthesis III CY AUG 05-06, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers C1 USAF,PHILLIPS LAB,ADV IMAGING BRANCH,KIRTLAND AFB,NM 87117. NR 0 TC 5 Z9 5 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2215-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2827 BP 152 EP 161 DI 10.1117/12.255078 PG 10 WC Optics SC Optics GA BG61T UT WOS:A1996BG61T00015 ER PT B AU Roggemann, MC Tyler, DW AF Roggemann, MC Tyler, DW BE Idell, PS Schulz, TJ TI Iterative model-based image reconstruction using a constrained least squares technique SO DIGITAL IMAGE RECOVERY AND SYNTHESIS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Digital Image Recovery and Synthesis III CY AUG 05-06, 1996 CL DENVER, CO SP Soc Photo Opt Instrumentat Engineers C1 USAF,INST TECHNOL,DEPT ENGN PHYS,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2215-0 J9 P SOC PHOTO-OPT INS PY 1996 VL 2827 BP 170 EP 181 DI 10.1117/12.255080 PG 12 WC Optics SC Optics GA BG61T UT WOS:A1996BG61T00017 ER PT B AU Suter, BW AF Suter, BW BE Picone, J TI Wavelets: What kind of signal processing is that? SO DIGITAL SIGNAL PROCESSING TECHNOLOGY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Digital Signal Processing Technology CY APR 10-11, 1996 CL ORLANDO, FL SP Soc Photo Opt Instrumentat Engineers DE wavelet transforms; multiresolution analysis; orthonormal bases C1 USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-2131-6 J9 P SOC PHOTO-OPT INS PY 1996 VL 2750 BP 118 EP 128 DI 10.1117/12.241981 PG 11 WC Computer Science, Hardware & Architecture; Optics SC Computer Science; Optics GA BF87T UT WOS:A1996BF87T00011 ER PT B AU Hall, CD AF Hall, CD BE Kirk, CL Inman, DJ TI Stationary-platform maneuvers of gyrostat satellites SO DYNAMICS AND CONTROL OF STRUCTURES IN SPACE III LA English DT Proceedings Paper CT 3rd International Conference on Dynamics and Control of Structures in Space (SPACE 96) CY MAY 27-31, 1996 CL LONDON, ENGLAND SP Cranfield Univ, Coll Aeronaut C1 USAF,INST TECHNOL,DEPT AERONAUT & ASTRONAUT,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 1 Z9 1 U1 0 U2 0 PU COMPUTATIONAL MECHANICS PUBLICATIONS LTD PI SOUTHAMPTON PA ASHURST LODGE, SOUTHAMPTON, HANTS, ENGLAND S04 2AA BN 1-85312-415-X PY 1996 BP 337 EP 348 PG 12 WC Automation & Control Systems; Engineering, Aerospace; Mechanics SC Automation & Control Systems; Engineering; Mechanics GA BG22T UT WOS:A1996BG22T00021 ER PT S AU Harrington, RA Banks, S Santos, E AF Harrington, RA Banks, S Santos, E GP IEEE COMP SOC TI GESIA: Uncertainty-based reasoning for a generic expert system intelligent user interface SO EIGHTH IEEE INTERNATIONAL CONFERENCE ON TOOLS WITH ARTIFICIAL INTELLIGENCE, PROCEEDINGS SE PROCEEDINGS - INTERNATIONAL CONFERENCE ON TOOLS WITH ARTIFICIAL INTELLIGENCE LA English DT Proceedings Paper CT 8th IEEE International Conference on Tools with Artificial Intelligence (TAI 96) CY NOV 16-19, 1996 CL TOULOUSE, FRANCE SP IEEE Comp Soc, Binghamton Univ, Ctr Intelligent Syst, INRIA, France AB Generic expert systems are reasoning systems that can be used in many application domains, thus requiring domain independence. The user interface for a generic expert system must contain an intelligence in order to maintain this domain independence and manage the complex interactions between the user and the expert system. This paper explores the uncertainty-based reasoning contained in an intelligent user interface called GESIA. GESIA's interface architecture and dynamically constructed Bayesian network are examined in detail to show how uncertainty-based reasoning enhances the capabilities of this user interface. RP Harrington, RA (reprint author), USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433, USA. NR 0 TC 8 Z9 8 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1082-3409 BN 0-7803-3757-3 J9 PROC INT C TOOLS ART PY 1996 BP 52 EP 55 DI 10.1109/TAI.1996.560400 PG 4 WC Computer Science, Artificial Intelligence SC Computer Science GA BG68F UT WOS:A1996BG68F00008 ER PT S AU Edwards, M Santos, E Banks, SB Stytz, MR AF Edwards, M Santos, E Banks, SB Stytz, MR GP IEEE COMP SOC TI Computer generated intelligent companions for distributed virtual environments SO EIGHTH IEEE INTERNATIONAL CONFERENCE ON TOOLS WITH ARTIFICIAL INTELLIGENCE, PROCEEDINGS SE PROCEEDINGS - INTERNATIONAL CONFERENCE ON TOOLS WITH ARTIFICIAL INTELLIGENCE LA English DT Proceedings Paper CT 8th IEEE International Conference on Tools with Artificial Intelligence (TAI 96) CY NOV 16-19, 1996 CL TOULOUSE, FRANCE SP IEEE Comp Soc, Binghamton Univ, Ctr Intelligent Syst, INRIA, France AB The employment of Computer Generated Forces (CGFs) within Distributed Virtual Environments (DVEs) dramatically increases the number of entities in a simulated training environment. However, current CGF limitations produce behaviours that can be defeated using methods ineffective against humans. Our research focuses on developing aircraft CGFs. It is necessary to deal with uncertainty, ambiguity, and approximation. The Fuzzy Wingman (FW) relies on fuzzy logic to provide these abilities. In this manner, the FW presents a reasonable approach to effectively populating the simulated training environment with low-cost CGFs while maintaining the realism of training with human-controlled entities. RP Edwards, M (reprint author), USAF,INST TECHNOL,DEPT ELECT & COMP ENGN,WRIGHT PATTERSON AFB,OH 45433, USA. NR 0 TC 2 Z9 2 U1 0 U2 1 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1082-3409 BN 0-7803-3757-3 J9 PROC INT C TOOLS ART PY 1996 BP 450 EP 452 DI 10.1109/TAI.1996.560779 PG 3 WC Computer Science, Artificial Intelligence SC Computer Science GA BG68F UT WOS:A1996BG68F00070 ER PT S AU Grote, JC AF Grote, JC BE Jen, AKY Lee, CYC Dalton, LR Rubner, MF Wnek, GE Chiang, LY TI Polymer integrated optic zero-gap directional coupler SO ELECTRICAL, OPTICAL, AND MAGNETIC PROPERTIES OF ORGANIC SOLID STATE MATERIALS III SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Electrical, Optical, and Magnetic Properties of Organic Solid State Materials III, at the 1995 MRS Fall Meeting CY NOV 27-DEC 01, 1995 CL BOSTON, MA SP Mat Res Soc C1 USAF,WRIGHT LAB,ELDO,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 4 Z9 4 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-316-9 J9 MATER RES SOC SYMP P PY 1996 VL 413 BP 231 EP 240 PG 10 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied; Polymer Science SC Engineering; Materials Science; Physics; Polymer Science GA BF67L UT WOS:A1996BF67L00030 ER PT B AU Fosness, ER Ninneman, RR Wilke, PS Johnson, CD AF Fosness, ER Ninneman, RR Wilke, PS Johnson, CD BE Lin, YK Su, TC TI Launch vibration isolation system SO ENGINEERING MECHANICS: PROCEEDINGS OF THE 11TH CONFERENCE, VOLS 1 AND 2 LA English DT Proceedings Paper CT 11th Engineering Mechanics Conference CY MAY 19-22, 1996 CL FT LAUDERDALE, FL SP Amer Soc Civil Engineers, Engn Mech Div, Appl Stochast Res, Florida Atlantic Univ Ctr C1 USAF,PHILLIPS LAB,VTSS,ALBUQUERQUE,NM 87117. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC CIVIL ENGINEERS PI NEW YORK PA UNITED ENGINEERING CENTER, 345 E 47TH ST, NEW YORK, NY 10017-2398 BN 0-7844-0172-1 PY 1996 BP 228 EP 231 PG 4 WC Engineering, Civil; Mechanics SC Engineering; Mechanics GA BG42L UT WOS:A1996BG42L00055 ER PT B AU Palazotto, AN Herup, EJ Harrington, T AF Palazotto, AN Herup, EJ Harrington, T BE Lin, YK Su, TC TI An experimental investigation of sandwich flat panels under low velocity impact SO ENGINEERING MECHANICS: PROCEEDINGS OF THE 11TH CONFERENCE, VOLS 1 AND 2 LA English DT Proceedings Paper CT 11th Engineering Mechanics Conference CY MAY 19-22, 1996 CL FT LAUDERDALE, FL SP Amer Soc Civil Engineers, Engn Mech Div, Appl Stochast Res, Florida Atlantic Univ Ctr C1 USAF,INST TECHNOL,WRIGHT PATTERSON AFB,OH 45433. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC CIVIL ENGINEERS PI NEW YORK PA UNITED ENGINEERING CENTER, 345 E 47TH ST, NEW YORK, NY 10017-2398 BN 0-7844-0172-1 PY 1996 BP 402 EP 407 PG 6 WC Engineering, Civil; Mechanics SC Engineering; Mechanics GA BG42L UT WOS:A1996BG42L00099 ER PT B AU Zhu, H Rish, JW Dass, WC AF Zhu, H Rish, JW Dass, WC BE Lin, YK Su, TC TI Effect of Maxwell binder on two-phase materials SO ENGINEERING MECHANICS: PROCEEDINGS OF THE 11TH CONFERENCE, VOLS 1 AND 2 LA English DT Proceedings Paper CT 11th Engineering Mechanics Conference CY MAY 19-22, 1996 CL FT LAUDERDALE, FL SP Amer Soc Civil Engineers, Engn Mech Div, Appl Stochast Res, Florida Atlantic Univ Ctr C1 APPL RES ASSOCIATES INC,TYNDALL AFB,FL 32403. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC CIVIL ENGINEERS PI NEW YORK PA UNITED ENGINEERING CENTER, 345 E 47TH ST, NEW YORK, NY 10017-2398 BN 0-7844-0172-1 PY 1996 BP 576 EP 579 PG 4 WC Engineering, Civil; Mechanics SC Engineering; Mechanics GA BG42L UT WOS:A1996BG42L00142 ER PT B AU Maji, AK Fosness, E Satpathi, D AF Maji, AK Fosness, E Satpathi, D BE Lin, YK Su, TC TI Structural redundancy and fracture in composite lattice/skin structures SO ENGINEERING MECHANICS: PROCEEDINGS OF THE 11TH CONFERENCE, VOLS 1 AND 2 LA English DT Proceedings Paper CT 11th Engineering Mechanics Conference CY MAY 19-22, 1996 CL FT LAUDERDALE, FL SP Amer Soc Civil Engineers, Engn Mech Div, Appl Stochast Res, Florida Atlantic Univ Ctr C1 USAF,PHILLIPS LAB,VTSC,PL,ALBUQUERQUE,NM 87117. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC CIVIL ENGINEERS PI NEW YORK PA UNITED ENGINEERING CENTER, 345 E 47TH ST, NEW YORK, NY 10017-2398 BN 0-7844-0172-1 PY 1996 BP 641 EP 644 PG 4 WC Engineering, Civil; Mechanics SC Engineering; Mechanics GA BG42L UT WOS:A1996BG42L00158 ER EF