FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Scroggie, DA Albright, A Harris, MD AF Scroggie, DA Albright, A Harris, MD TI The effect of glucosamine-chondroitin supplementation on glycosylated hemoglobin levels in patients with type 2 diabetes mellitus - A placebo-controlled, double-blinded, randomized clinical trial SO ARCHIVES OF INTERNAL MEDICINE LA English DT Article ID INSULIN-RESISTANCE; IN-VIVO; GLUTAMINE-FRUCTOSE-6-PHOSPHATE AMIDOTRANSFERASE; MANGANESE ASCORBATE; SECRETION; INFUSION; SULFATE; OSTEOARTHRITIS; HYDROCHLORIDE; RATS AB Background: With increasing use of glucosamine-containing supplements for the treatment of osteoarthritis, there is increasing concern in the medical community about possible toxic effects. The present study was undertaken to determine whether glucosamine supplementation altered hemoglobin A(1c) concentrations in patients with well-controlled diabetes mellitus. Objective: To evaluate possible effects of glucosamine supplementation on glycemic control in a selected population of patients with type 2 diabetes mellitus. Design: Placebo-controlled, double-blinded, randomized clinical trial. Setting: Outpatient, diabetes monitoring clinic. Patients: Patients were typically elderly patients, evenly divided between men and women. Most of the patients were being treated with I or 2 drugs for glycemic control. Intervention: In daily doses for 90 days, patients received either placebo or a combination of 1500 mg of glucosamine hydrochloride with 1200 mg of chondroitin sulfate (Cosamin DS; Nutramax Laboratories Inc, Edgewood, Md). Main Outcome Measure: Hemoglobin A(1c) levels before and after 90 days of therapy. Results: There were 4 withdrawals from the glucosamine-treated group. Three were related to comorbidities (myocardial infarction, congestive heart failure, and atrial fibrillation) and I to a possible adverse reaction (excessive flatus). No other patient reported any adverse effects of glucosamine therapy, and no patient had any change in their diabetes management. Mean hemoglobin A,, concentrations were not significantly different between groups prior to glucosamine therapy. Posttreatment hemoglobin A(1c) concentrations were not significantly different between groups, nor were there any significant differences within groups before and after treatment. Conclusion: This study demonstrates that oral glucosamine supplementation does not result in clinically significant alterations in glucose metabolism in patients with type 2 diabetes mellitus. C1 Wilford Hall USAF Med Ctr, Dept Rheumatol, Lackland AFB, TX 78236 USA. Uniformed Serv Univ Hlth Sci, Dept Med, Bethesda, MD 20814 USA. RP Scroggie, DA (reprint author), 759 MDOS MMIR,2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA. NR 37 TC 49 Z9 53 U1 0 U2 3 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 USA SN 0003-9926 J9 ARCH INTERN MED JI Arch. Intern. Med. PD JUL 14 PY 2003 VL 163 IS 13 BP 1587 EP 1590 DI 10.1001/archinte.163.13.1587 PG 4 WC Medicine, General & Internal SC General & Internal Medicine GA 701HL UT WOS:000184162100012 PM 12860582 ER PT J AU Pignone, M Phillips, CJ Elasy, TA Fernandez, A AF Pignone, M Phillips, CJ Elasy, TA Fernandez, A TI Physicians' ability to predict the risk of coronary heart disease SO BMC HEALTH SERVICES RESEARCH LA English DT Article ID PRIMARY PREVENTION; CARDIOVASCULAR RISK; STANDARDIZED PATIENTS; VIGNETTES; DOCTORS; CARE AB Background: Coronary heart disease (CHD) is the leading cause of death in the United States. Previous research examining physicians ability to estimate cardiovascular risk has shown that physicians' generally overestimate the absolute risk of CHD events. This question has, however, only studied risk prediction for a limited number of patient care scenarios. The aim of this study is to measure the ability of physicians to estimate the risk of CHD events in patients with no previous history of coronary heart disease. Methods: Twelve primary prevention scenarios with a 5-year risk of CHD events were developed. This questionnaire was surveyed at 3 university teaching hospitals where the participants were a convenience sample of internal medicine residents and fellows or attending physicians in general internal medicine or cardiology. For each scenario, physicians were asked to estimate the baseline 5-year risk of a coronary heart disease event and the revised risk if the patient were to receive lipid-lowering drug therapy. Estimates of the baseline 5-year risk were compared with values calculated from Framingham risk equations. Inaccurate responses were defined as those with a ratio of estimated to actual risk of more than 1.5 or less than 0.67. Physicians' estimates of the relative risk reduction with therapy were considered to be accurate if they were between 25% and 40%. Results: 79 physicians ( 53 residents, 8 fellows, 18 attending physicians) completed the survey. Only 24% of physicians' risk estimates were accurate. In most cases, physicians overestimated the absolute risk of cardiovascular events without therapy ( proportion overestimating ranged from 32-92% for the 12 individual scenarios). Physicians made larger errors in patient scenarios involving patients with high total or LDL cholesterol levels. Physicians' estimates of the relative risk reduction from treatment were more accurate: 43% of estimates were between 25 and 40%. Over 85% of physicians recommended treatment in 10 of 12 scenarios. Conclusions: Physicians overestimate the absolute risk of CHD events and the potential absolute benefit of drug therapy. C1 Univ N Carolina, Div Gen Internal Med, Chapel Hill, NC 27514 USA. Univ N Carolina, Cecil Sheps Ctr Hlth Serv Res, Chapel Hill, NC USA. USAF, Med Operat Agcy, Populat Hlth Support Div, Brooks AFB, TX USA. Vanderbilt Univ, Div Gen Internal Med, Nashville, TN USA. Vanderbilt Univ, Ctr Hlth Serv Res, Nashville, TN USA. Univ Calif San Francisco, San Francisco Gen Hosp, Div Gen Internal Med, San Francisco, CA USA. RP Pignone, M (reprint author), Univ N Carolina, Div Gen Internal Med, Chapel Hill, NC 27514 USA. NR 19 TC 15 Z9 16 U1 0 U2 2 PU BIOMED CENTRAL LTD PI LONDON PA MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T 4LB, ENGLAND SN 1472-6963 J9 BMC HEALTH SERV RES JI BMC Health Serv. Res. PD JUL 11 PY 2003 VL 3 AR 13 DI 10.1186/1472-6963-3-13 PG 6 WC Health Care Sciences & Services SC Health Care Sciences & Services GA 710YV UT WOS:000184711100001 PM 12857356 ER PT J AU Miracle, DB Sanders, WS Senkov, ON AF Miracle, DB Sanders, WS Senkov, ON TI The influence of efficient atomic packing on the constitution of metallic glasses SO PHILOSOPHICAL MAGAZINE LA English DT Article ID RANDOM CLOSE PACKING; AMORPHOUS-ALLOYS; SPHERES; MODEL; FORMABILITY; DENSITY; VOLUME AB Efficient atomic packing is shown to be a fundamental consideration in the formation of metallic glasses. A simple concept of packing efficiency, based on atom packing in the first coordination shell of solute-centred clusters, is proposed and developed. This model leads to the prediction that specific radius ratios, defined as the radius of the solute atom divided by the radius of the solvent atom, are preferred in the constitution of metallic glasses. Analysis of a large number of binary and complex metallic glasses shows that these specific critical radius ratios R* are indeed preferred in known metallic glasses. The predictions of this model extend previous proposals to describe the influence of topology on the formation of metallic glasses. Although this model represents a simple idealization, the strong agreement with published metallic glasses suggests that efficient atomic packing, enabled by solute-centred clusters, forms a fundamental consideration in the constitution of metallic glasses. C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Universal Energy Syst Inc, Dayton, OH 45432 USA. RP USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. EM daniel.miracle@wpath.af.mil RI Senkov, Oleg/C-7197-2012 OI Senkov, Oleg/0000-0001-5587-415X NR 37 TC 272 Z9 281 U1 9 U2 84 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND SN 1478-6435 EI 1478-6443 J9 PHILOS MAG JI Philos. Mag. PD JUL 11 PY 2003 VL 83 IS 20 BP 2409 EP 2428 DI 10.1080/1478643031000098828 PG 20 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 700UG UT WOS:000184129100007 ER PT J AU Retter, A Bedding, TR Buzasi, DL Kjeldsen, H Kiss, LL AF Retter, A Bedding, TR Buzasi, DL Kjeldsen, H Kiss, LL TI Oscillations in Arcturus from WIRE photometry SO ASTROPHYSICAL JOURNAL LA English DT Article DE stars : individual (alpha Bootis); stars : oscillations ID SOLAR-LIKE OSCILLATIONS; ALPHA-URSAE-MAJORIS; ACOUSTIC-OSCILLATIONS; STAR; ASTEROSEISMOLOGY; VELOCITY; BOOTIS AB Observations of the red giant Arcturus (alpha Boo) obtained with the star tracker on the Wide Field Infrared Explorer (WIRE) satellite during a baseline of 19 successive days in 2000 July-August are analyzed. The amplitude spectrum has a significant excess of power at low frequencies. The highest peak is at similar to4.1 muHz (2.8 days), which is in agreement with previous ground-based radial velocity studies. The variability of Arcturus can be explained by sound waves, but it is not clear whether these are coherent p-mode oscillations or a single mode with a short lifetime. C1 Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia. USAF Acad, Dept Phys, Colorado Springs, CO 80840 USA. Aarhus Univ, Theoret Astrophys Ctr, DK-8000 Aarhus, Denmark. RP Retter, A (reprint author), Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia. RI Kiss, Laszlo/A-2539-2008; OI Bedding, Timothy/0000-0001-5943-1460; Bedding, Tim/0000-0001-5222-4661 NR 23 TC 36 Z9 36 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUL 10 PY 2003 VL 591 IS 2 BP L151 EP L154 DI 10.1086/377211 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 698UJ UT WOS:000184017100020 ER PT J AU Guha, S Zakel, A Blackshire, JL Krishnamurthy, S AF Guha, S Zakel, A Blackshire, JL Krishnamurthy, S TI Irradiance and temperature dependence of the charge carrier lifetimes in bulk Hg0.6Cd0.4Te SO APPLIED PHYSICS LETTERS LA English DT Article ID ELECTRON LASER MEASUREMENT; INDIUM ARSENIDE; 2-PHOTON ABSORPTION; RECOMBINATION; RATES; INAS; INSB AB We have measured the temperature and irradiance-dependent charge carrier lifetime in bulk Hg0.6Cd0.4Te using an all-optical pump-probe technique. The carrier lifetime is shown to increase by 50% when the ambient sample temperature is increased from 80 to 300 K. At irradiance levels below 1 MW/cm(2), the lifetime decreases sharply with increasing incident irradiance. However, for further increase in irradiance level, the lifetime values reach a saturation. A theoretical model is used to explain both temperature and irradiance dependence of the lifetime. (C) 2003 American Institute of Physics. C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. SRI Int, Menlo Pk, CA 94025 USA. Anteon Corp, Fairfax, VA 22030 USA. RP Guha, S (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. NR 15 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUL 7 PY 2003 VL 83 IS 1 BP 78 EP 80 DI 10.1063/1.1589189 PG 3 WC Physics, Applied SC Physics GA 696FY UT WOS:000183877800027 ER PT J AU Bletzinger, P Ganguly, BN AF Bletzinger, P Ganguly, BN TI The effect of displacement current on fast-pulsed dielectric barrier discharges SO JOURNAL OF PHYSICS D-APPLIED PHYSICS LA English DT Article ID EXCITATION AB Applied voltage and gas pressure dependent electrical power deposition efficiencies in a short voltage pulse excited dielectric barrier discharge have been measured. The effect of time delay between the onset of gas breakdown, peak conduction current and the applied voltage pulse with increasing gas pressure leads to higher net power deposition at lower E/n, where E is the electric field and n is the gas density. An accurate measurement of the power deposition requires careful estimation of the displacement current with the applied voltage as the voltage time derivative dV/dt increases. The variation of optical emission intensity measurements of Ar 2p(1)-1s(2), N-2 C-B and N-2(+) B-X transitions with increasing gas pressure validated the conclusions reached from the time resolved electrical measurements. C1 ISSI, Dayton, OH USA. AFRL, Wright Patterson AFB, OH USA. RP Bletzinger, P (reprint author), ISSI, Dayton, OH USA. NR 14 TC 27 Z9 28 U1 1 U2 8 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0022-3727 J9 J PHYS D APPL PHYS JI J. Phys. D-Appl. Phys. PD JUL 7 PY 2003 VL 36 IS 13 BP 1550 EP 1552 AR PII S0022-3727(03)61172-1 DI 10.1088/0022-3727/36/13/318 PG 3 WC Physics, Applied SC Physics GA 722DV UT WOS:000185360900024 ER PT J AU Schwartz, M Davis, AN Yeates, AT Berry, RJ Dudis, DS AF Schwartz, M Davis, AN Yeates, AT Berry, RJ Dudis, DS TI The electronic structure and properties of pristine and protonated 1-azapolyacetylenes SO JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM LA English DT Article DE substituted polyacetylenes; electronic structure; ionization energy; electron affinity; pi-pi* electronic transition energy ID DENSITY-FUNCTIONAL THEORY; EXCITED-STATES; EXCITATION-ENERGIES; CONDUCTING POLYMERS; BUTADIENE; POLYACETYLENE; SPECTROSCOPY; IONIZATION; BIPOLARONS; ETHYLENE AB Ionization energies (IEs), electron affinities (EAs) and the lowest pi --> pi(*) transition energies, DeltaE(S-0 - S-1) and DeltaE(S-0 - T-1), for a series of polyacetylenes (PA), 1-azapolyacetylenes (APA) and the protonated azapolyacetylenes (HAPA) were computed at the CASSCF/6-31G(d) and ROHF/6-31G(d) levels. Whereas introduction of the terminal imino group has almost no effect on any of the electronic properties, changes induced by protonation of the group are dramatic. As expected, IEs are greatly increased; the effect persists in systems with as many as 10-15 double bonds. EAs and excitation energies are lowered markedly, and large structural differences from the non-protonated species are found, even in the asymptotic large molecule limit. Observed trends are consistent with a simple qualitative picture, in which the HOMOs of the HAPAs are localized in regions far from the NH2+ terminus, whereas LUMOs have maximum electron density in regions close to this moiety. The results offer the possibility that one may fine tune the electronic properties of azapolyacetylenes by variation of the N:C ratio and subsequent selective protonation (via pH adjustment) of a fraction of the nitrogens. (C) 2003 Elsevier B.V. All rights reserved. C1 Univ N Texas, Dept Chem, Denton, TX 76203 USA. Wright Patterson AFB, Polymer Branch, Wright Patterson AFB, OH 45433 USA. RP Schwartz, M (reprint author), Univ N Texas, Dept Chem, POB 305070, Denton, TX 76203 USA. NR 38 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-1280 J9 J MOL STRUC-THEOCHEM JI Theochem-J. Mol. Struct. PD JUL 4 PY 2003 VL 629 BP 285 EP 293 DI 10.1016/S0166-1280(03)00192-1 PG 9 WC Chemistry, Physical SC Chemistry GA 714CT UT WOS:000184895300029 ER PT J AU Schaefer, DW Zhao, J Brown, JM Anderson, DP Tomlin, DW AF Schaefer, DW Zhao, J Brown, JM Anderson, DP Tomlin, DW TI Morphology of dispersed carbon single-walled nanotubes SO CHEMICAL PHYSICS LETTERS LA English DT Article ID MECHANICAL-PROPERTIES; PURIFICATION; ROPES AB Using scattering methods, we determine the morphology of carbon nanotube suspensions over length scales from I nm to 50 mum. We find no evidence of rod-like character at any length. Rather, a network structure of aggregated tubes, similar to that seen in dry samples, is found. These observations have significant implications regarding the use of single-walled nanotubes as a composite reinforcing filler since the network structure has significantly lower modulus than fully dispersed tubes. We also show that it is possible to isolate a rod-like fraction from the aggregated suspension using intense sonication, providing a potential route to fully dispersed nanotubes. (C) 2003 Elsevier Science B.V. All rights reserved. C1 USAF, Res Lab, Tech Management Concepts Inc, Wright Patterson AFB, OH 45433 USA. Univ Cincinnati, Dept Chem & Mat Engn, Cincinnati, OH 45221 USA. Univ Dayton, Res Inst, Dayton, OH 45469 USA. RP Schaefer, DW (reprint author), Univ Cincinnati, Dept Chem & Mat Engn, 2625 Clifton Ave, Cincinnati, OH 45221 USA. RI USAXS, APS/D-4198-2013 NR 25 TC 88 Z9 88 U1 0 U2 10 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 JUL 3 PY 2003 VL 375 IS 3-4 BP 369 EP 375 DI 10.1016/S0009-2614(03)00867-4 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 697WL UT WOS:000183966200017 ER PT J AU Lovell, TA Cochran, JE Cicci, DA Cho, S AF Lovell, TA Cochran, JE Cicci, DA Cho, S TI A study of the re-entry orbit discrepancy involving tethered satellites SO ACTA ASTRONAUTICA LA English DT Article ID IDENTIFICATION AB This paper describes an investigation of the motion of objects in near-Earth orbit that have a high probability of being identified as re-entering the Earth's atmosphere. In the case of two or more satellites tethered together, each object's motion deviates from the traditional Keplerian-like motion of a single untethered body, due to the tension force in the tether. Consequently, classical identification and motion prediction techniques applied to a tethered object may produce results that indicate that the object is on course to re-enter when it actually is not, or vice-versa. In this study the factors that cause tethered bodies to behave differently than expected, and how significant these factors must be to cause a discrepancy regarding re-entry, are determined. A candidate re-entry identification methodology based on this foundation is then formulated. (C) 2002 Elsevier Science Ltd. All rights reserved. C1 USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA. Auburn Univ, Dept Aerosp Engn, Auburn, AL 36849 USA. Elect & Telecommun Res Inst, Taejon 305600, South Korea. RP Lovell, TA (reprint author), USAF, Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA. NR 11 TC 0 Z9 0 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0094-5765 J9 ACTA ASTRONAUT JI Acta Astronaut. PD JUL PY 2003 VL 53 IS 1 BP 21 EP 33 AR PII S0094-5765(02)00137-6 DI 10.1016/S0094-5765(02)00137-6 PG 13 WC Engineering, Aerospace SC Engineering GA 680TL UT WOS:000182994600003 ER PT J AU Cohen, K Siegel, S McLaughlin, T Gillies, E AF Cohen, K Siegel, S McLaughlin, T Gillies, E TI Feedback control of a cylinder wake low-dimensional model SO AIAA JOURNAL LA English DT Article ID LOW REYNOLDS-NUMBERS; CIRCULAR-CYLINDER C1 USAF Acad, Dept Aeronaut, Colorado Springs, CO 80840 USA. Univ Glasgow, Dept Aerosp Engn, Glasgow G12 8QQ, Lanark, Scotland. RP Cohen, K (reprint author), USAF Acad, Dept Aeronaut, Colorado Springs, CO 80840 USA. RI Gillies, Eric/C-1947-2009; OI Cohen, Kelly/0000-0002-8655-1465 NR 13 TC 19 Z9 19 U1 0 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0001-1452 J9 AIAA J JI AIAA J. PD JUL PY 2003 VL 41 IS 7 BP 1389 EP 1391 DI 10.2514/2.2087 PG 3 WC Engineering, Aerospace SC Engineering GA 698GR UT WOS:000183990800021 ER PT J AU Zahn, CM Gonzalez, DI Suto, C Kennedy, S Hines, JF AF Zahn, CM Gonzalez, DI Suto, C Kennedy, S Hines, JF TI Low-dose oral contraceptive effocts on thromboelastogram criteria and relationship to hypercoagulability SO AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY LA English DT Article DE low-dose oral contraceptives; thromboelastography; hypercoagulability ID VENOUS THROMBOEMBOLISM; FOLLOW-UP; RISK; COAGULATION; THROMBELASTOGRAPHY; COMPONENTS; DISEASE AB OBJECTIVE: The study was undertaken to assess hypercoagulability, by using thromboelastography, in women who use low-dose oral contraceptives (OCs). STUDY DESIGN: Forty-three women using low-dose OCs (less than or equal to 35 mug ethinyl estradiol) underwent thromboelastography before starting OCs and again during the third month of OC use. Prior and 3-month mean values of four thromboelastogram parameters (maximum amplitude [MA], K time, alpha angle, and R time) were compared by using paired t tests. Comparison according to progestin type was also performed with unpaired t tests. RESULTS: Prior versus 3-month values for MA, a, and K were not significantly different (P values-K: 0.8; alpha: .34; MA: 0.49); power was adequate to detect small differences. The 3-month R time was decreased compared with pre-OC values (P = .025), although the magnitude of this change was not characteristic of hypercoagulability. Comparison according to progestin type demonstrated no difference. CONCLUSION: We found no significant trend toward hypercoagulability in women who used low-dose OCs and who otherwise had no known thromboembolic risks. C1 Wilford Hall USAF Med Ctr, Dept Obstet & Gynecol, San Antonio, TX 78236 USA. Brooke Army Med Ctr, Dept Obstet & Gynecol, San Antonio, TX USA. RP Zahn, CM (reprint author), Wilford Hall USAF Med Ctr, Dept Obstet & Gynecol, San Antonio, TX 78236 USA. NR 25 TC 6 Z9 7 U1 0 U2 0 PU MOSBY, INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 USA SN 0002-9378 J9 AM J OBSTET GYNECOL JI Am. J. Obstet. Gynecol. PD JUL PY 2003 VL 189 IS 1 BP 43 EP 47 DI 10.1067/mob.2003.344 PG 5 WC Obstetrics & Gynecology SC Obstetrics & Gynecology GA 703TE UT WOS:000184296400008 PM 12861136 ER PT J AU Ly, JW Beall, DP Sanders, TG AF Ly, JW Beall, DP Sanders, TG TI MR imaging of glenohumeral instability SO AMERICAN JOURNAL OF ROENTGENOLOGY LA English DT Article ID GLENOID LABRUM; ARTHROGRAPHY; SHOULDER; TEARS C1 Wilford Hall USAF Med Ctr, Dept Radiol & Nucl Med, MDTS MTRD 759, Lackland AFB, TX 78236 USA. Uniformed Serv Univ Hlth Sci, Dept Radiol & Nucl Med, Bethesda, MD 20814 USA. RP Ly, JW (reprint author), Wilford Hall USAF Med Ctr, Dept Radiol & Nucl Med, MDTS MTRD 759, Ste 1,2200 Bergquist Dr, Lackland AFB, TX 78236 USA. NR 9 TC 12 Z9 13 U1 0 U2 0 PU AMER ROENTGEN RAY SOC PI RESTON PA 1891 PRESTON WHITE DR, SUBSCRIPTION FULFILLMENT, RESTON, VA 22091 USA SN 0361-803X J9 AM J ROENTGENOL JI Am. J. Roentgenol. PD JUL PY 2003 VL 181 IS 1 BP 203 EP 213 PG 11 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 692DG UT WOS:000183644800040 PM 12818861 ER PT J AU Oh, YR Carr-Lopez, SM Probasco, JM Crawley, PG AF Oh, YR Carr-Lopez, SM Probasco, JM Crawley, PG TI Levofloxacin-induced autoimmune hemolytic anemia SO ANNALS OF PHARMACOTHERAPY LA English DT Article DE hemolytic anemia; autoimmune; levofloxacin ID FLUOROQUINOLONES AB Objective: To report a case of autoimmune hemolytic anemia (AIHA) secondary to levofloxacin. Case Summary: An 82-year-old white man was treated with levofloxacin 500 mg/d for cellulitis. Three days following completion of levofloxacin therapy, the patient presented to the emergency department with severe jaundice, dizziness, and loss of vision. He received packed red blood cells (PRBCs) and was discharged home. Two days later at the follow-up visit, he was diagnosed with AIHA secondary to levofloxacin. The patient was hospitalized and treated with a tapering dose of prednisone and additional PRBC infusion. He was discharged from the hospital in stable condition after 3 days. Repeated hematologic laboratory studies following discharge demonstrated that the hemolytic anemia had resolved. Discussion: Hemolytic anemia due to levofloxacin is an extremely rare, but potentially fatal, adverse drug event. An objective causality assessment revealed that the adverse reaction was probable. To our knowledge, this is the first published case of levofloxacin-induced AIHA. However, there are published case reports of hemolytic anemia with other fluoroquinolones including ciprofloxacin (n=12) and temafloxacin (n=95). Temafloxacin was withdrawn from the market in 1992 due to this adverse effect. The mechanism by which levofloxacin triggers hemolytic anemia is unknown. We believe that an immune-mediated reaction is most likely. Conclusions: Levofloxacin-induced AIHA is a rare but serious complication of therapy. Immediate discontinuation of the offending medication and treatment of the hemolytic anemia are essential. Until more information is available, levofloxacin should not be prescribed for patients with previous reactions to any fluoroquinolone. C1 USAF, BSC, David Grant USAF Med Ctr, Dept Clin Pharm Serv, Travis AFB, CA 94535 USA. Univ Pacific, Thomas J Long Sch Pharm & Hlth Sci, Stockton, CA 95211 USA. USAF, BSC, David Grant USAF Med Ctr, Dept Family Practice, Travis AFB, CA 94535 USA. USAF, BSC, David Grant USAF Med Ctr, Dept Internal Med, Travis AFB, CA 94535 USA. RP Oh, YR (reprint author), USAF, BSC, David Grant USAF Med Ctr, Dept Clin Pharm Serv, 101 Bodin Circle, Travis AFB, CA 94535 USA. NR 16 TC 9 Z9 11 U1 0 U2 1 PU HARVEY WHITNEY BOOKS CO PI CINCINNATI PA PO BOX 42696, CINCINNATI, OH 45242 USA SN 1060-0280 J9 ANN PHARMACOTHER JI Ann. Pharmacother. PD JUL-AUG PY 2003 VL 37 IS 7-8 BP 1010 EP 1013 DI 10.1345/aph.1C525 PG 4 WC Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA 699VC UT WOS:000184075800012 PM 12841809 ER PT J AU Spain, JC Nishino, SF Witholt, B Tan, LS Duetz, WA AF Spain, JC Nishino, SF Witholt, B Tan, LS Duetz, WA TI Production of 6-phenylacetylene picolinic acid from diphenylacetylene by a toluene-degrading Acinetobacter strain SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID PSEUDOMONAS-CEPACIA G4; COMETABOLIC DEGRADATION; AROMATIC-COMPOUNDS; TRICHLOROETHYLENE; BACTERIA; BIOTRANSFORMATION; BIODEGRADATION; OXIDATION; PATHWAYS AB Several strategies for using enzymes to catalyze reactions leading to the synthesis of relatively simple substituted picolinic acids have been described. The goal of the work described here was to synthesize a more complex molecule, 6-phenylacetylene picolinic acid [6-(2-phenylethynyl)pyridine-2-carboxylic acid], for use as a potential endcapping agent for aerospace polymers. We screened 139 toluene-degrading strains that use a variety of catabolic pathways for the ability to catalyze oxidative transformation of diphenylacetylene. Acinetobacter sp. strain F4 catalyzed the overall conversion of diphenylacetylene to a yellow metabolite, which was identified as a putative meta ring fission product (2-hydroxy-8-phenyl-6-oxoocta-2,4-dien-7-ynoic acid [RFP]). The activity could be sustained by addition of toluene at a How rate determined empirically so that the transformations were sustained in spite of the fact that toluene is a competitive inhibitor of the enzymes. The overall rate of transformation was limited by the instability of RFP. The RFP was chemically converted to 6-phenylacetylene picolinic acid by treatment with ammonium hydroxide. The results show the potential for using the normal growth substrate to provide energy and to maintain induction of the enzymes involved in biotransformation during preliminary stages of biocatalyst development. C1 AFRL, MLQL, Tyndall AFB, FL 32403 USA. ETH Honggerberg, Inst Biotechnol, HPT, CH-8093 Zurich, Switzerland. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. RP Spain, JC (reprint author), AFRL, MLQL, 139 Barnes Dr,Ste 2, Tyndall AFB, FL 32403 USA. RI Witholt, Bernard/A-7340-2012; Tan, Loon-Seng/F-6985-2012 OI Tan, Loon-Seng/0000-0002-2134-9290 NR 31 TC 5 Z9 6 U1 1 U2 4 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0099-2240 J9 APPL ENVIRON MICROB JI Appl. Environ. Microbiol. PD JUL PY 2003 VL 69 IS 7 BP 4037 EP 4042 DI 10.1128/AEM.69.7.4037-4042.2003 PG 6 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 699XM UT WOS:000184082100047 PM 12839779 ER PT J AU Kim, D Warde, C Vaccaro, K Woods, C AF Kim, D Warde, C Vaccaro, K Woods, C TI Imaging multispectral polarimetric sensor: single-pixel design, fabrication, and characterization SO APPLIED OPTICS LA English DT Article ID SURFACE-RELIEF GRATINGS; COUPLED-WAVE ANALYSIS; POLARIZATION; DIFFRACTION; FILMS AB A discrete-component approach was taken to establish the operational feasibility of a novel, imaging, midinfrared, multispectral, polarimetric sensor for remote-sensing application. The sensor is designed to exploit the spectral and polarimetric characteristics of the scene as discriminants. Pixelated multispectral filters and polarization filters were designed and fabricated on sapphire and Si substrates, respectively, and both were characterized. A single-pixel spectropolarimetric composite filter was characterized by use of a Fourier transform infrared spectrometer and a Pt-Si thermal-imaging camera. The experimental results show excellent agreement with theoretical predictions. (C) 2003 Optical Society of America. C1 MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA. USAF, Res Lab, Sensors Directorate, Hanscom Air Force Base, Hanscom AFB, MA 01731 USA. RP Kim, D (reprint author), Cornell Univ, 228 Olin Hall, Ithaca, NY 14850 USA. EM dk263@cornell.edu RI Kim, Donghyun/A-2682-2011 NR 38 TC 12 Z9 12 U1 2 U2 3 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 JUL 1 PY 2003 VL 42 IS 19 BP 3756 EP 3764 DI 10.1364/AO.42.003756 PG 9 WC Optics SC Optics GA 696RU UT WOS:000183901700008 PM 12868811 ER PT J AU Hager, GD Nikolaev, VD Svistun, MI Zagidullin, MV AF Hager, GD Nikolaev, VD Svistun, MI Zagidullin, MV TI Lasing performance of a chemical oxygen iodine laser (COIL) with advanced ejector-nozzle banks SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING LA English DT Article ID CM GAIN LENGTH AB Experimental results have demonstrated that the use of ejector-nozzle concepts can allow to achieve simultaneously high chemical efficiency and high pressure recovery in a chemical oxygen iodine laser. The estimated small-signal gain of the gain medium generated by these nozzle banks was from 0.5 to 0.8 %/cm. In laser experiments with all nozzle banks (NB-1-NB-5), Pitot pressures of the order of 80 Torr and Mach numbers of similar to2 in the cavity-mixing chamber have been achieved. The geometry of a given ejector-nozzle bank and gas-flow conditions affect the power extraction and chemical efficiency. The main factors for high efficiency and high power are small mixing scale, high area for the oxygen flow, dilution of chlorine by helium, and the arrangement of nozzles. A chemical efficiency of 25% at a power level of similar to900 W was obtained for NB-1 having the smallest mixing scale, parallel injection of all flows, and dilution of oxygen by helium. The highest power of similar to1.2 kW with a chemical efficiency of 19.5% and 160 W/cm(2) of specific output power was achieved with NB-5 having the largest area for the oxygen flow and dilution of oxygen by helium. C1 PN Lebedev Phys Inst, Samara Branch, Samara 443011, Russia. USAF, Res Lab, Kirtland AFB, NM 87117 USA. AFRL Directed Energy Directorate, Kirtland AFB, NM 87117 USA. RP Nikolaev, VD (reprint author), PN Lebedev Phys Inst, Samara Branch, Novosadovaya Str 221, Samara 443011, Russia. RI Svistun, Mikhael/N-5606-2015; Zagidullin, Marsel/M-8631-2015 NR 8 TC 8 Z9 9 U1 0 U2 3 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0947-8396 J9 APPL PHYS A-MATER JI Appl. Phys. A-Mater. Sci. Process. PD JUL PY 2003 VL 77 IS 2 BP 325 EP 329 DI 10.1007/s00339-003-2122-8 PG 5 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 688PM UT WOS:000183444500024 ER PT J AU Kodymova, J Spalek, O Jirasek, V Censky, M Hager, GD AF Kodymova, J Spalek, O Jirasek, V Censky, M Hager, GD TI Development of the Chemical Oxygen-Iodine Laser (COIL) with chemical generation of atomic iodine SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING LA English DT Article AB This article addresses the development of a Chemical Oxygen-Iodine Laser (COIL) with alternative chemical ways of generating atomic iodine. Injection of atomic iodine as opposed to molecular iodine has the potential to improve the COIL efficiency. This paper describes two chemical methods for generating iodine atoms based on the gas phase reactions of hydrogen/deuterium iodide with fluorine or chlorine atoms, which are also produced chemically. Simplified one-dimensional gas dynamic modeling that describes the stream-wise profiles of species concentrations within both reaction systems is used to gain a theoretical understanding of both reaction systems under COIL conditions. The modeling results are used for the design of an experimental device and the interpretation of experimental data. The first experimental investigation studies the production of iodine atoms produced from reactions of Cl with HI. Atomic iodine yields of 70-100% in nitrogen are obtained, and the gain on the I(P-2(1/2))-I(P-2(3/2)) transition in a flow of singlet oxygen is measured. C1 Acad Sci Czech Republ, Inst Phys, Prague 18221 8, Czech Republic. Acad Sci Czech Republ, Inst Inorgan Chem, CZ-25068 Rez, Czech Republic. USAF, Res Lab, DE, Kirtland AFB, NM 87117 USA. RP Kodymova, J (reprint author), Acad Sci Czech Republ, Inst Phys, Slovance 2, Prague 18221 8, Czech Republic. RI Censky, Miroslav/G-6412-2014; Kodymova, Jarmila/H-3077-2014 NR 10 TC 13 Z9 13 U1 0 U2 1 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0947-8396 J9 APPL PHYS A-MATER JI Appl. Phys. A-Mater. Sci. Process. PD JUL PY 2003 VL 77 IS 2 BP 331 EP 336 DI 10.1007/s00339-003-2136-2 PG 6 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 688PM UT WOS:000183444500025 ER PT J AU Wisniewski, CF Hewett, KB Manke II, GC Crowell, PG Truman, CR Hager, GD AF Wisniewski, CF Hewett, KB Manke II, GC Crowell, PG Truman, CR Hager, GD TI Small signal gain measurements in a small scale HF overtone laser SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING LA English DT Article ID CHEMICAL-LASER; BAND AB The overtone gain medium of a small-scale HF overtone laser was probed using a sub-Doppler tunable diode laser. Two-dimensional spatially resolved small signal gain and temperature maps were generated for several ro-vibrational transitions in the HF (v=2-->v=0) overtone band. Our results compare well with previous measurements of the overtone gain in a similar HF laser device. C1 USAF, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA. No Grumman Informat Technol, Sci & Technol Operating Unit, Adv Technol Div, Albuquerque, NM USA. Univ New Mexico, Dept Mech Engn, Albuquerque, NM 87131 USA. RP Hewett, KB (reprint author), USAF, Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA. NR 27 TC 5 Z9 8 U1 1 U2 2 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0947-8396 J9 APPL PHYS A-MATER JI Appl. Phys. A-Mater. Sci. Process. PD JUL PY 2003 VL 77 IS 2 BP 337 EP 342 DI 10.1007/s00339-003-2123-7 PG 6 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 688PM UT WOS:000183444500026 ER PT J AU Sherman, PM Soares, GM Dick, EJ Harroff, HH Werchan, PM Davis, MR Ortegon, DP AF Sherman, PM Soares, GM Dick, EJ Harroff, HH Werchan, PM Davis, MR Ortegon, DP TI In vivo evaluation of the effects of gravitational force (+Gz) on over-the-wire stainless steel Greenfield inferior vena cava filter in swine SO CARDIOVASCULAR AND INTERVENTIONAL RADIOLOGY LA English DT Article DE inferior vena cava, vena cava filter; Greenfield filter; acceleration stress; gravitational force ID MINIATURE SWINE; FOLLOW-UP; COMPLICATIONS; STRESS AB This study was done to determine the effect of exposure to gravitational force (acceleration stress) on in vivo over-the-wire stainless steel Greenfield inferior vena cava filters. Fifteen pigs underwent venous cut down and placement of a stainless steel Greenfield filter. A 4-week observation period simulated realistic convalescence and allowed sufficient time for epithelialization. Ten pigs were exposed to acceleration stress in a centrifuge (3G run for 15 sec followed by rest until return to baseline heart rate, then a 9G run for 15 sec), with inertial loading in a head-to-tail direction (+Gz). Fluoroscopy during acceleration stress allowed assessment for filter migration. Five pigs were not exposed to acceleration stress. AP and lateral abdominal radiographs were obtained at post-filter placement, convalescence, and centrifuge exposure to determine the position and integrity of the filter. All 15 IVCs were resected and evaluated for gross or histological injury to the vessel wall. IVC filter placement was technically successful in all 15 pigs. Radiographic measurements were limited secondary to differences in pig positioning. Fluoroscopy showed no filter migration. All filters were securely attached to the vena cava by the hooks without gross evidence of perforation or hemorrhage. There were varying degrees of fibroplasia involving the hooks and tip of the filters in both the control and experimental groups. Histologically, there was evidence of prior hemorrhage at the level of the hooks, which was similar between the control and experimental groups. It is concluded that Greenfield filter position and vena caval integrity at the implantation site is unaffected by high acceleration stress. C1 Wilford Hall USAF Med Ctr, Dept Radiol, Lackland AFB, TX 78236 USA. Clin Res Squadron, Lackland AFB, TX 78236 USA. USAF, Res Lab, AFRL, HEPM, Brooks AFB, TX 78235 USA. Wilford Hall USAF Med Ctr, Dept Gen Surg, Lackland AFB, TX 78236 USA. RP Sherman, PM (reprint author), Wilford Hall USAF Med Ctr, Dept Radiol, 59MDW,759MDTS,MTRD,2200 Bergquist Dr,Ste 1, Lackland AFB, TX 78236 USA. NR 28 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0174-1551 J9 CARDIOVASC INTER RAD JI Cardiovasc. Interv. Radiol. PD JUL-AUG PY 2003 VL 26 IS 4 BP 386 EP 394 DI 10.1007/s00270-003-2701-2 PG 9 WC Cardiac & Cardiovascular Systems; Radiology, Nuclear Medicine & Medical Imaging SC Cardiovascular System & Cardiology; Radiology, Nuclear Medicine & Medical Imaging GA 720TP UT WOS:000185276300010 PM 14667122 ER PT J AU Durning, SJ Sweet, JM Chambers, SL AF Durning, SJ Sweet, JM Chambers, SL TI Pulmonary mass in tachypneic, febrile adult SO CHEST LA English DT Editorial Material ID ROUND PNEUMONIA; SPHERICAL PNEUMONIA C1 Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA. Wright Patterson Med Ctr, Wright Patterson AFB, OH USA. RP Durning, SJ (reprint author), SGOMI, Dept Internal Med, Med Grp 74, 4881 Sugar Maple Dr, Wright Patterson AFB, OH 45433 USA. NR 7 TC 10 Z9 11 U1 0 U2 0 PU AMER COLL CHEST PHYSICIANS PI NORTHBROOK PA 3300 DUNDEE ROAD, NORTHBROOK, IL 60062-2348 USA SN 0012-3692 J9 CHEST JI Chest PD JUL PY 2003 VL 124 IS 1 BP 372 EP 375 DI 10.1378/chest.124.1.372 PG 4 WC Critical Care Medicine; Respiratory System SC General & Internal Medicine; Respiratory System GA 701KP UT WOS:000184167000057 PM 12853547 ER PT J AU Schwertner, HA AF Schwertner, HA TI Bilirubin concentration, UGT1A1*28 polymorphism, and coronary artery disease SO CLINICAL CHEMISTRY LA English DT Editorial Material ID ISCHEMIC-HEART-DISEASE; SERUM BILIRUBIN; RISK; ASSOCIATION C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. RP Schwertner, HA (reprint author), Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. NR 10 TC 8 Z9 12 U1 0 U2 0 PU AMER ASSOC CLINICAL CHEMISTRY PI WASHINGTON PA 2101 L STREET NW, SUITE 202, WASHINGTON, DC 20037-1526 USA SN 0009-9147 J9 CLIN CHEM JI Clin. Chem. PD JUL PY 2003 VL 49 IS 7 BP 1039 EP 1040 DI 10.1373/49.7.1039 PG 2 WC Medical Laboratory Technology SC Medical Laboratory Technology GA 694TD UT WOS:000183789600002 PM 12816897 ER PT J AU Ben Belgacem, F Chilton, LK Seshaiyer, P AF Ben Belgacem, F Chilton, LK Seshaiyer, P TI The hp-mortar finite-element method for the mixed elasticity and Stokes problems SO COMPUTERS & MATHEMATICS WITH APPLICATIONS LA English DT Article; Proceedings Paper CT 1st International Conference on the p and hp Versions of the Finite Element Method CY MAY 31-JUN 02, 2001 CL WASHINGTON UNIV, ST LOUIS, MO HO WASHINGTON UNIV ID ITERATIVE SUBSTRUCTURING METHODS; P-VERSION; LINEAR ELASTICITY; ELLIPTIC-SYSTEMS; 1-DIMENSION; DISCRETIZATIONS; PRECONDITIONERS; APPROXIMATION; STABILITY; LOCKING AB The motivation of this work is to apply the hp-version of the mortar finite-element method to the nearly incompressible elasticity model formulated as a mixed displacement-pressure problem as well as to Stokes equations in primal velocity-pressure variables. Within each subdomain, the local approximation is designed using div-stable hp-mixed finite elements. The displacement is computed in a mortared space, while the pressure is not subjected to any constraints across the interfaces. By a Boland-Nicolaides argument, we prove that the discrete saddle-point problem satisfies a Babuska-Brezzi inf-sup condition. The inf-sup constant is optimal in the sense that it depends only on the local (to the subdomains) characteristics of the mixed finite elements and, in particular, it does not increase with the total number of the subdomains. The consequences, that we are aware of, such an important result are twofold. The numerical analysis of the approximability properties of the hp-mortar discretization for the mixed elasticity problem allows us to derive an asymptotic rate of convergence that is optimal up to rootlogp in the displacement; this is addressed in the present contribution. When the mortar discrete problem is inverted by substructured iterative methods based on Krylov subspaces with block preconditioners, in view of the results for conforming finite elements [1], the condition number of the solver should grow logarithmically on (p, h) and not depend on the total number of the subdomains. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Univ Toulouse 3, CNRS, INSAT, Math Ind & Phys UMR 5640,UPS,UT1, F-31062 Toulouse 04, France. USAF, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA. Texas Tech Univ, Dept Math & Stat, Lubbock, TX 79409 USA. RP Univ Toulouse 3, CNRS, INSAT, Math Ind & Phys UMR 5640,UPS,UT1, 118 Route Narbonne, F-31062 Toulouse 04, France. NR 39 TC 11 Z9 11 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0898-1221 EI 1873-7668 J9 COMPUT MATH APPL JI Comput. Math. Appl. PD JUL PY 2003 VL 46 IS 1 BP 35 EP 55 AR PII S0898-1221(03)00200-1 DI 10.1016/S0898-1221(03)90079-4 PG 21 WC Mathematics, Applied SC Mathematics GA 718YD UT WOS:000185173300005 ER PT J AU Harris-Stith, R Erickson, QL Elston, DM David-Bajar, K AF Harris-Stith, R Erickson, QL Elston, DM David-Bajar, K TI Bullous eruption: A manifestation of lupus erythematosus SO CUTIS LA English DT Article ID VII COLLAGEN; BLISTERING DISEASES; ACQUISITA AB Bullous lupus erythematosus (BSLE) is a rare subset of systemic lupus erythematosus (SLE), often associated with autoimmunity to type VII collagen. Generally, patients with BSLE meet the criteria for SLE as defined by the American College of Rheumatology We present a case of a 17-year-old adolescent girl who presented with a vesiculobullous eruption without detectable type VII collagen antibodies and without full criteria for SLE. Differential staining was characteristic for lupus erythematosus (LE), suggesting her eruption is related to LE. We review the spectrum of bullous disease in patients with LE and discuss the pathogenesis and histology of these eruptions, as well as current therapeutic options. C1 Geisinger Med Ctr, Dept Dermatol, Danville, PA 17822 USA. Wilford Hall USAF Med Ctr, Lackland AFB, San Antonio, TX 78236 USA. Brooke Army Med Ctr, San Antonio, TX USA. Goodfellow AFB, Goodfellow AFB, TX USA. RP Elston, DM (reprint author), Geisinger Med Ctr, Dept Dermatol, 100 N Acad Ave, Danville, PA 17822 USA. NR 16 TC 14 Z9 15 U1 0 U2 0 PU QUADRANT HEALTHCOM INC PI CHATHAM PA 26 MAIN ST, STE A, CHATHAM, NJ 07928-2402 USA SN 0011-4162 J9 CUTIS JI Cutis PD JUL PY 2003 VL 72 IS 1 BP 31 EP 37 PG 7 WC Dermatology SC Dermatology GA 701XX UT WOS:000184195200004 PM 12889712 ER PT J AU O'Loughlin, EJ Kemner, KM Burris, DR AF O'Loughlin, EJ Kemner, KM Burris, DR TI Effects of Ag-I, Au-III, and Cu-II on the reductive dechlorination of carbon tetrachloride by green rust SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID HOMOGENEOUS AQUEOUS-SOLUTION; PERMEABLE REACTIVE BARRIERS; ZERO-VALENT METALS; ALKYL-HALIDES; CORROSION PRODUCTS; MEDIATED REDUCTION; CHLORINATED HYDROCARBONS; RAPID DECHLORINATION; CARBENE DIMERIZATION; HYDROMORPHIC SOILS AB Green rusts (GRs), mixed iron(II)/iron(III) hydroxide minerals found in many suboxic environments, have been shown to reduce a range of organic and inorganic contaminants, including several chlorinated hydrocarbons. Many studies have demonstrated the catalytic activity of transition metal species in the reduction of chlorinated hydrocarbons, suggesting the potential for enhanced reduction by GR in the presence of an appropriate transition metal catalyst. Reductive dechlorination of carbon tetrachloride (CT) was examined in aqueous suspensions of GR amended with Ag-I, Au-III, or Cu-II. The CT reduction rates were greatly increased for systems amended with Cu-II, Au-III, and Ag-I (listed in order of increasing rates) relative to GR alone. Observed intermediates and products included chloroform, dichloromethane, chloromethane, methane, acetylene, ethene, ethane, carbon monoxide, tetrachloroethene, and various nonchlorinated C-3 and C-4 compounds. Product distributions for the reductive dechlorination of CT were highly dependent on the transition metal used, A reaction pathway scheme is proposed in which CT is reduced primarily to methane and other nonchlorinated end products, largely through a series of one-electron reductions forming radicals and carbenes/carbenoids. Recently, X-ray absorption fine structure analysis of aqueous GR suspensions amended with Ag-I, Au-III, or Cull showed that the metals were reduced to their zerovalent forms. A possible mechanism for CT reduction is the formation of a galvanic couple involving the zerovalent metal and GR, with reduction of CT occurring on the surface of the metal and GR serving as the bulk electron source. The enhanced reduction of CT by GR suspensions amended with Ag-I, Au-III, or Cull may prove useful in the development of improved materials for remediation of chlorinated organic contaminants. C1 USAF, Res Lab, AFRL MLQL, Tyndall AFB, FL 32403 USA. Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA. Integrated Sci & Technol Inc, Panama City, FL 32401 USA. RP O'Loughlin, EJ (reprint author), USAF, Res Lab, AFRL MLQL, 139 Barnes Dr, Tyndall AFB, FL 32403 USA. RI O'Loughlin, Edward/C-9565-2013; ID, MRCAT/G-7586-2011 OI O'Loughlin, Edward/0000-0003-1607-9529; NR 91 TC 67 Z9 74 U1 7 U2 47 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD JUL 1 PY 2003 VL 37 IS 13 BP 2905 EP 2912 DI 10.1021/es030304w PG 8 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 697ZT UT WOS:000183973700030 PM 12875393 ER PT J AU Ly, JQ Beall, DP AF Ly, JQ Beall, DP TI Quiz case SO EUROPEAN JOURNAL OF RADIOLOGY LA English DT Editorial Material ID MACRODYSTROPHIA-LIPOMATOSA; DIAGNOSIS; FOOT C1 Wilford Hall USAF Med Ctr, Dept Radiol & Nucl Med, San Antonio, TX 78236 USA. Uniformed Serv Univ Hlth Sci, Dept Radiol & Nucl Med, Bethesda, MD 20814 USA. RP Ly, JQ (reprint author), Wilford Hall USAF Med Ctr, Dept Radiol & Nucl Med, 2200 Bergquist Dr,Suite 1, San Antonio, TX 78236 USA. NR 5 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0720-048X J9 EUR J RADIOL JI Eur. J. Radiol. PD JUL PY 2003 VL 47 IS 1 BP 16 EP 18 AR PII S0720-048X(02)00135-3 DI 10.1016/S0720-048X(02)00135-3 PG 3 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 694NZ UT WOS:000183781800004 PM 12810216 ER PT J AU Bau, JL Ly, JQ Lusk, JD AF Bau, JL Ly, JQ Lusk, JD TI Quiz case SO EUROPEAN JOURNAL OF RADIOLOGY LA English DT Editorial Material ID NODULAR FASCIITIS; HAND C1 Wilford Hall USAF Med Ctr, Dept Radiol, Lackland AFB, TX 78236 USA. Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX 78236 USA. Penn State Univ, Milton S Hershey Med Ctr, Coll Med, Hershey, PA 17033 USA. RP Ly, JQ (reprint author), Wilford Hall USAF Med Ctr, Dept Radiol, Lackland AFB, TX 78236 USA. NR 4 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0720-048X J9 EUR J RADIOL JI Eur. J. Radiol. PD JUL PY 2003 VL 47 IS 1 BP 54 EP 56 DI 10.1016/S0720-048X(03)00025-1 PG 3 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 694NZ UT WOS:000183781800011 PM 12810223 ER PT J AU Edmonds, LD Ly, JQ Carter, MC Lusk, JD AF Edmonds, LD Ly, JQ Carter, MC Lusk, JD TI Quiz case SO EUROPEAN JOURNAL OF RADIOLOGY LA English DT Editorial Material ID LESSER TROCHANTER; AVULSION; FRACTURE; DISEASE; TUMOR C1 Wilford Hall USAF Med Ctr, Dept Radiol, Lackland AFB, TX 78236 USA. Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX 78236 USA. Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA. RP Ly, JQ (reprint author), Wilford Hall USAF Med Ctr, Dept Radiol, 2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA. NR 6 TC 2 Z9 3 U1 0 U2 0 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0720-048X J9 EUR J RADIOL JI Eur. J. Radiol. PD JUL PY 2003 VL 47 IS 1 BP 57 EP 59 DI 10.1016/S0720-048X(03)00040-8 PG 3 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 694NZ UT WOS:000183781800012 PM 12810224 ER PT J AU Osborn, PM Ly, JQ Kendall, KR Beall, DP Currie, J AF Osborn, PM Ly, JQ Kendall, KR Beall, DP Currie, J TI Quiz case SO EUROPEAN JOURNAL OF RADIOLOGY LA English DT Editorial Material ID METATARSUS ADDUCTUS; SKEWFOOT C1 Wilford Hall USAF Med Ctr, Dept Radiol, Lackland AFB, TX 78236 USA. Univ Texas, Sch Med, Houston, TX 77030 USA. Mayo Clin & Mayo Fdn, Dept Radiol, Rochester, MN 55905 USA. Uniformed Serv Univ Hlth Sci, Dept Radiol & Nucl Med, Bethesda, MD 20814 USA. Wilford Hall USAF Med Ctr, Dept Orthoped Surg, Lackland AFB, TX 78236 USA. RP Ly, JQ (reprint author), Wilford Hall USAF Med Ctr, Dept Radiol, 2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA. NR 8 TC 0 Z9 1 U1 0 U2 0 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0720-048X J9 EUR J RADIOL JI Eur. J. Radiol. PD JUL PY 2003 VL 47 IS 1 BP 60 EP 63 DI 10.1016/S0720-048X(03)00043-3 PG 4 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 694NZ UT WOS:000183781800013 PM 12810225 ER PT J AU Kihm, KD Pratt, DM AF Kihm, KD Pratt, DM TI Intensity broadening of internally reflected laser beam from a meniscus formed in a capillary pore - applied for automated liquid column height measurements SO EXPERIMENTS IN FLUIDS LA English DT Article ID EVAPORATING LIQUIDS; PLATES AB An automated liquid column height measurement technique using the total internal reflection of a collimated laser beam from the convex meniscus surface is proposed. This new technique can alleviate the shortcomings of the traditional cathetometer that tends to introduce user bias. Experimental measurements and theoretical predictions have been conducted to examine the detected signal broadening and measurement uncertainties of the proposed technique, resulting from (1) the finite laser-beam diameter, (2) the capillary pore diameter, (3) the beam steering by thermal gradients, and (4) the beam steering by density variations of the liquid inside a capillary pore. For the collimated 52.6-mum diameter laser beam, for three different tested pores of 0.5, 1.0, and 2.0 mm diameter, the overall uncertainty of the wicking height measurement is estimated to be +/-12 mum in the case of on-axis detection, and +/-24 mum in the case of off-axis detection. C1 Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA. USAF, AFRL VAS, Wright Patterson AFB, OH 45433 USA. RP Kihm, KD (reprint author), Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA. NR 17 TC 0 Z9 0 U1 0 U2 1 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0723-4864 J9 EXP FLUIDS JI Exp. Fluids PD JUL PY 2003 VL 35 IS 1 BP 49 EP 57 DI 10.1007/s00348-003-0634-9 PG 9 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA 711ZV UT WOS:000184771700007 ER PT J AU Dalton, SR Fillman, EP Altman, CE Gardner, TL Davis, TL Bastian, BC Libow, LF Elston, DM AF Dalton, SR Fillman, EP Altman, CE Gardner, TL Davis, TL Bastian, BC Libow, LF Elston, DM TI Atypical junctional melanocytic proliferations in benign lichenoid keratosis SO HUMAN PATHOLOGY LA English DT Article DE atypical junctional melanocytic proliferation; malignant melanoma in situ; lichenoid tissue reaction; benign lichenoid keratosis; regression; fluorescent in situ hybridization ID MELANOMA IN-SITU; SUN-DAMAGED SKIN; MALIGNANT-MELANOMA; LENTIGO MALIGNA; NEVI AB Melanocytic lesions with lichenoid regression may mimic a benign lichenoid keratosis (BLK) histologically. A total of 336 BLKs were reviewed and deeper sections obtained to determine the frequency of this phenomenon. Two cases (0.6%) showed at least I melanocytic nest or junctional multinucleated melanocyte (starburst melanocyte) on deeper sections confirmed by MART-1 immunostaining. Both of these cases demonstrated solar elastosis, and I case had an effaced rete ridge pattern. Not included in the histological study are 5 additional cases in which the initial slide showed only lichenoid dermatitis, but deeper sections obtained before to the initial sign-out revealed a melanocytic proliferation. These 5 cases would have been signed out as "consistent with BLK" if deeper sections had not been obtained. Fluorescent in situ hybridization (FISH) was performed on 3 cases; in each case, the melanocytes demonstrated a loss of chromosome 9p21 DNA copy number. The finding of nests of genetically altered melanocytes on severely sun-damaged skin strongly suggests that these cases represent lichenoid regression of melanoma in situ. Pathologists should approach a diagnosis of BLK cautiously in the setting of severely sun-damaged skin. (C) 2003 Elsevier Inc. All rights reserved. C1 Geisinger Med Ctr, Dept Dermatol, Danville, PA 17822 USA. Geisinger Med Ctr, Dept Pathol, Danville, PA 17822 USA. Brooke Army Med Ctr, Dept Pathol, Ft Sam Houston, TX 78234 USA. Brooke Army Med Ctr, Dept Dermatol, Ft Sam Houston, TX 78234 USA. Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX USA. S Texas Dermatopathol, San Antonio, TX USA. Univ Calif San Francisco, Ctr Comprehens Canc, Dept Dermatol, San Francisco, CA USA. Univ Calif San Francisco, Ctr Comprehens Canc, Dept Pathol, San Francisco, CA USA. RP Elston, DM (reprint author), Geisinger Med Ctr, Dept Dermatol, Danville, PA 17822 USA. NR 14 TC 10 Z9 10 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 USA SN 0046-8177 J9 HUM PATHOL JI Hum. Pathol. PD JUL PY 2003 VL 34 IS 7 BP 706 EP 709 DI 10.1016/S0046-8177(03)00234-X PG 4 WC Pathology SC Pathology GA 702XB UT WOS:000184249100011 PM 12874767 ER PT J AU Mellen, G Pachter, M Raquet, J AF Mellen, G Pachter, M Raquet, J TI Closed-form solution for determining emitter location using time difference of arrival measurements SO IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS LA English DT Letter AB A direct and short derivation of an algorithm based on the closed-form solution of the nonlinear equations for emitter location using time difference of arrival (TDOA) measurements from N + 1 receivers, N greater than or equal to 3, is given. C1 USAF, Inst Technol, Dept Elect & Comp Engn, AFIT,ENG, Wright Patterson AFB, OH 45433 USA. RP Mellen, G (reprint author), USAF, Inst Technol, Dept Elect & Comp Engn, AFIT,ENG, 2950 P St,Bldg 640, Wright Patterson AFB, OH 45433 USA. NR 6 TC 46 Z9 50 U1 0 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9251 J9 IEEE T AERO ELEC SYS JI IEEE Trans. Aerosp. Electron. Syst. PD JUL PY 2003 VL 39 IS 3 BP 1056 EP 1058 DI 10.1109/TAES.2003.1238756 PG 3 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA 728NJ UT WOS:000185723000025 ER PT J AU Lacy, SL Bernstein, DS AF Lacy, SL Bernstein, DS TI Subspace identification with guaranteed stability using constrained optimization SO IEEE TRANSACTIONS ON AUTOMATIC CONTROL LA English DT Article DE system identification; stability; subspace identification; convex optimization; linear systems ID MODEL IDENTIFICATION; STABLE MODELS; ALGORITHMS; SYSTEMS AB In system identification, the true system is often known to be stable. However, due to finite sample constraints, modeling errors, plant disturbances and measurement noise, the identified model may be unstable. We present a constrained optimization method to ensure asymptotic stability of the identified model in the context of subspace identification methods. In subspace identification, we first obtain an estimate of the state sequence or. extended observability matrix and then solve a least squares optimization problem to estimate the system parameters. To ensure asymptotic stability of the identified model, we write the least-squares optimization problem as a convex linear programming problem with mixed equality, quadratic, and positive-semidefinite constraints suitable for existing convex optimization codes such as SeDuMi. We present examples to illustrate the method and compare to existing approaches. C1 USAF, Res Lab, SpaceVehicles Directorate, Kirtland AFB, NM 87117 USA. Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA. RP Lacy, SL (reprint author), USAF, Res Lab, SpaceVehicles Directorate, Kirtland AFB, NM 87117 USA. NR 22 TC 44 Z9 45 U1 0 U2 7 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9286 J9 IEEE T AUTOMAT CONTR JI IEEE Trans. Autom. Control PD JUL PY 2003 VL 48 IS 7 BP 1259 EP 1263 DI 10.1109/TAC.2003.814273 PG 5 WC Automation & Control Systems; Engineering, Electrical & Electronic SC Automation & Control Systems; Engineering GA 700AG UT WOS:000184090000018 ER PT J AU Kolekofski, KE Heminger, AR AF Kolekofski, KE Heminger, AR TI Beliefs and attitudes affecting intentions to share information in an organizational setting SO INFORMATION & MANAGEMENT LA English DT Article DE information sharing; information ownership; information stewardship; organizational information; theory of reasoned action (TRA) AB Information resource management (IRM) asserts that information is a resource that managers should use wisely to improve their organization's operations and to ensure that their company is competitive in today's marketplace. One IRM principle is sharing information in ways that enhance efficiency and effectiveness. Yet, there are many examples where information is not readily shared. Workers' beliefs and attitudes towards sharing information may help explain this shortcoming. In this study, we propose a model that defines the influences on one's intent to share information, based upon the theory of reasoned action (TRA). We then test our model by surveying the workers in a unit of a large governmental organization that often fails to reap the benefits, despite proclamations of support for IRM principles. Our study explored the employees' beliefs and attitudes about sharing organizational information and suggests that the role that attitude plays may be more complicated than first considered. (C) 2002 Elsevier Science B.V. All rights reserved. C1 USAF, Inst Technol, ENV, Wright Patterson AFB, OH 45433 USA. RP Heminger, AR (reprint author), USAF, Inst Technol, ENV, Blg 640,2950 P St, Wright Patterson AFB, OH 45433 USA. NR 19 TC 73 Z9 75 U1 4 U2 25 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7206 J9 INFORM MANAGE-AMSTER JI Inf. Manage. PD JUL PY 2003 VL 40 IS 6 BP 521 EP 532 AR PII S0378-7206(02)00068-X DI 10.1016/S0378-7206(02)00068-X PG 12 WC Computer Science, Information Systems; Information Science & Library Science; Management SC Computer Science; Information Science & Library Science; Business & Economics GA 683RL UT WOS:000183163300004 ER PT J AU Brown, GG Dell, RF Holtz, H Newman, AM AF Brown, GG Dell, RF Holtz, H Newman, AM TI How US Air Force Space Command optimizes long-term investment in space systems SO INTERFACES LA English DT Article DE planning : government; programming : integer AB United States Air Force Space Command spends billions of dollars each year acquiring and developing launch vehicles and space systems. The space systems in orbit must continually meet defensive and offensive requirements and remain interoperable over time. Space Command can launch additional space systems only if it has a launch vehicle of sufficient capability. Space planners using space and missile optimization analysis (SAMOA) consider a 24-year time horizon when determining which space assets and launch vehicles to fund and procure. A key tool within SAMOA is an integer linear program called the space command optimizer of utility toolkit (SCOUT) that Space Command uses for long-range planning. SCOUT gives planners insight into the annual funding profiles needed to meet Space Command's acquisition goals. The 1999 portfolio of 74 systems will cost about $310 billion and includes systems that can lift satellites into orbit; yield information on space, surface, and subsurface events, activities, and threats; and destroy terrestrial, airborne, and space targets. C1 USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA. USAF, Mat Command Directorate Requirements, Off Aerosp Studies, Kirtland AFB, NM 87117 USA. Colorado Sch Mines, Div Econ & Business, Golden, CO 80401 USA. RP Brown, GG (reprint author), USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA. NR 16 TC 13 Z9 14 U1 4 U2 6 PU INST OPERATIONS RESEARCH MANAGEMENT SCIENCES PI LINTHICUM HTS PA 901 ELKRIDGE LANDING RD, STE 400, LINTHICUM HTS, MD 21090-2909 USA SN 0092-2102 J9 INTERFACES JI Interfaces PD JUL-AUG PY 2003 VL 33 IS 4 BP 1 EP 14 DI 10.1287/inte.33.4.1.16369 PG 14 WC Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA 715AR UT WOS:000184948800001 ER PT J AU Miller, TM Arnold, ST Viggiano, AA AF Miller, TM Arnold, ST Viggiano, AA TI G3 and G2 thermochemistry of sulfur fluoride neutrals and anions SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY LA English DT Article DE electron affinity; fluoride affinity; bond strength; G3; G3(MP2); G2; G2(MP2); SF; SF-; SF2; SF2_; SF3; SF3-; SF4; SF4-; SF5; SF5_-; SF6; SF6- ID BOND-DISSOCIATION ENERGIES; NEGATIVE-ION CHEMISTRY; ELECTRON-AFFINITIES; GAUSSIAN-2 THEORY; GAS-PHASE; ATTACHMENT; HEXAFLUORIDE; MOLECULES; EXCHANGE; SFN+ AB Gaussian-3 (G3) and Gaussian-2 (G2) calculations were performed to obtain total energies, enthalpies, and Gibbs free energies for neutral and anionic SFn, for n=1-6. Electron affinities and bond enthalpies were derived from these results. The electron affinities agree well with experimental results. Calculated first dissociation bond strengths agree with experimental results except for SF5, where a discrepancy was known to exist. G3(MP2) and G2(MP2) total energies are also presented for the SFn and SFn-. Results from more economical density functional theory are compared to the G3 ones and found to agree within 0.4 eV, except for EA(SF6). (C) 2003 Elsevier Science B.V. All rights reserved. C1 USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. RP Miller, TM (reprint author), USAF, Res Lab, Space Vehicles Directorate, 29 Randolph Rd, Hanscom AFB, MA 01731 USA. NR 40 TC 35 Z9 35 U1 0 U2 12 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1387-3806 J9 INT J MASS SPECTROM JI Int. J. Mass Spectrom. PD JUL PY 2003 VL 227 IS 3 BP 413 EP 420 DI 10.1016/S1387-3806(03)00079-4 PG 8 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA 693WM UT WOS:000183741400011 ER PT J AU Dhainaut, JM Guo, XY Mei, C Spottswood, SM Wolfe, HF AF Dhainaut, JM Guo, XY Mei, C Spottswood, SM Wolfe, HF TI Nonlinear random response of panels in an elevated thermal-acoustic environment SO JOURNAL OF AIRCRAFT LA English DT Article ID FINITE-ELEMENT; LINEARIZATION TECHNIQUES; VIBRATIONS AB Sonic fatigue is generally considered as being one of the major design areas for the newest generation of high-speed flight vehicles. Efficient analysis methods for predicting nonlinear random response and fatigue life are urgently needed. This paper presents a finite element formulation for the prediction of nonlinear random response of thin isotropic/composite panels subjected simultaneously to high acoustic loads and elevated temperatures. Laminated plate theory and von Karman large displacement relations are used to derive the nonlinear equations of motion for an arbitrarily laminated composite panel subjected to combined acoustic and thermal loads. The nonlinear equations of motion in physical degrees of freedom are transformed to a set of coupled nonlinear equations in truncated modal coordinates, retaining fewer degrees of freedom. Numerical integration is employed to obtain the panel response to simulated Gaussian band-limited white noise. To validate the formulation, results are compared with existing linear and nonlinear solutions to assess the accuracy of nonlinear modal stiffness matrices and simulated random loads. Examples are given for an isotropic panel at various combinations of sound pressure levels and temperatures. Numerical results include rms values of maximum deflection and strain, time histories of deflection and strain response, probability distribution functions, power spectrum densities, and higher statistical moments. Numerical results predicted all three types of panel motions for a thermal buckled simply supported isotropic plate: linear random vibration about one of the buckled equilibrium position, snap-through motions between the two buckled positions, and nonlinear random response over both buckled positions. C1 Old Dominion Univ, Dept Aerosp Engn, Norfolk, VA 23529 USA. USAF, Res Lab, VASS, Struct Dynam Branch, Wright Patterson AFB, OH 45433 USA. RP Dhainaut, JM (reprint author), Old Dominion Univ, Dept Aerosp Engn, 241 Kaufman Hall, Norfolk, VA 23529 USA. NR 27 TC 16 Z9 18 U1 2 U2 9 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD JUL-AUG PY 2003 VL 40 IS 4 BP 683 EP 691 DI 10.2514/2.3146 PG 9 WC Engineering, Aerospace SC Engineering GA 709RJ UT WOS:000184637900010 ER PT J AU Chirila, MM Garces, NY Halliburton, LE Evans, DR Route, RK Fejer, MM AF Chirila, MM Garces, NY Halliburton, LE Evans, DR Route, RK Fejer, MM TI Thermally stimulated luminescence from vapor-transport-equilibrated LiTaO3 crystals SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID DOPED LITHIUM-NIOBATE; SINGLE-CRYSTALS; STOICHIOMETRIC LITAO3; LINBO3; TANTALATE; CENTERS; CONGRUENT; DAMAGE; GROWTH; IONS AB Thermally stimulated luminescence (TSL), optical absorption, and electron paramagnetic resonance (EPR) have been used to characterize the emission of ultraviolet light from undoped LiTaO3. The crystals in this study were grown from a congruent melt and then subjected to a vapor-transport-equilibration (VTE) treatment. Two overlapping TSL peaks occur at 94 and 98 K, with each showing a 350 nm maximum in its spectral emission. These peaks are observed after a 77 K exposure of the crystals to x rays or lasers (266, 325, or 355 nm). Congruent crystals from the same boule (but not VTE treated) produced no measurable emission in similar experiments. During excitation of the VTE-treated crystals at 77 K, holes are localized on oxygen ions, either self-trapped or with a nearby stabilizer, and electrons are trapped at regular Ta5+ ions and at Fe3+ impurities (present at trace levels), where they form Ta4+ and Fe2+ ions. The hole centers and the Fe3+ ions have characteristic EPR spectra, and a broad optical absorption band peaking near 1600 nm is attributed to the Ta4+ electron center. Upon warming, the trapped hole centers formed during the initial excitation become unstable below 100 K and move to Ta4+ ions, thus causing radiative recombination in the TaO6 units. (C) 2003 American Institute of Physics. C1 W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA. USAF, Res Lab, Mat & Mfg Directorate, MLPJ, Wright Patterson AFB, OH 45433 USA. Stanford Univ, Edward L Ginzton Lab, Stanford, CA 94305 USA. RP W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA. EM larry.halliburton@mail.wvu.edu NR 34 TC 2 Z9 2 U1 1 U2 7 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 JUL 1 PY 2003 VL 94 IS 1 BP 301 EP 306 DI 10.1063/1.1580643 PG 6 WC Physics, Applied SC Physics GA 692CN UT WOS:000183642900041 ER PT J AU Sojka, JJ Thompson, DC Schunk, RW Eccles, JV Makela, JJ Kelley, MC Gonzalez, SA Aponte, N Bullett, TW AF Sojka, JJ Thompson, DC Schunk, RW Eccles, JV Makela, JJ Kelley, MC Gonzalez, SA Aponte, N Bullett, TW TI Ionospheric data assimilation: recovery of strong mid-latitudinal density gradients SO JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS LA English DT Article DE assimilative modeling; electric field perturbations; mid-latitude ionosphere; mid-latitude density gradients ID TOTAL ELECTRON-CONTENT; MODEL; TOMOGRAPHY; SATELLITE; CAMPAIGN; FIELDS; ARECIBO; WINDS; MAPS AB The September 1999 Caribbean Ionospheric Campaign (CIC99), spanning the period 15-17 September 1999, was a period of repeated moderate geomagnetic storms. Both incoherent scatter radar (ISR) and digisonde F-layer measurements were made in the vicinity of Arecibo, Puerto Rico by the Arecibo ISR and Ramey Digisonde, which is one of the Digital Ionospheric Sounding System instruments. These data sets showed significant day-to-day F-layer variability, especially in the evening sectors. Local ionospheric data assimilation with the Assimilation Ionospheric Model (AIM1.06L) was able to reproduce this ionospheric day-to-day weather. However, during this time the Arecibo ISR was able to determine that strong latitude density gradients existed in the evening sector. These latitude gradients ranged from 5% to over 10% per degree of latitude, increasing equatorward. The climatological ionospheric forecast model (IFM) predicts gradients of the correct sign but significantly less than 5% per degree. Using the observed fact that the strong local vertical plasma drift was produced by an eastward electric field, an enhanced equatorial electric field model was created. This model was used to drive the IFM-E model. The effect of the enhanced, electric field is to drive plasma flux tubes to higher latitudes and effectively move the poleward shoulder of the equatorial anomalies to higher latitudes. In this simulation, the simulated Arecibo density gradients range from 10% to 20% per degree. In addition, the local densities at Arecibo are now higher than the observed ones in the evening sector. The irony of this study is that the local AIM1.06L assimilation provides the correct local densities in the F region but is based upon the assumption of corotating field lines. When the plasma flux tubes are free to be E x B/B-2 convected, as in the IFM equator model simulations, the local densities are too high. However, gradients in latitude are more realistic although somewhat larger than observed. This latter simulation is based on "better" physics than the AIM 1.06L, but because the latitude (apex altitude) distribution of the eastward electric field driver is uncertain, it produces poor assimilation results. This study points to the need for more extended latitude coverage in the CIC campaigns in order to address the issue of a minimum data requirement for the assimilation. (C) 2003 Elsevier Ltd. All rights reserved. C1 Space Environm Corp, Providence, UT 84332 USA. Cornell Univ, Sch Elect & Comp Engn, Ithaca, NY 14853 USA. Natl Astron & Ionosphere Ctr, Arecibo Observ, Arecibo, PR 00612 USA. USAF, Res Lab, Battleship Environm Div, Hanscom AFB, MA 01731 USA. RP Sojka, JJ (reprint author), Space Environm Corp, 221 N Spring Creek Pkwy,Suite A, Providence, UT 84332 USA. RI Gonzalez, Sixto/G-1982-2011 OI Gonzalez, Sixto/0000-0001-5544-1426 NR 29 TC 5 Z9 5 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1364-6826 J9 J ATMOS SOL-TERR PHY JI J. Atmos. Sol.-Terr. Phys. PD JUL PY 2003 VL 65 IS 10 BP 1087 EP 1097 DI 10.1016/j/jastp.2003.07.004 PG 11 WC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences SC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences GA 735QB UT WOS:000186125100003 ER PT J AU Sinitsin, VG Yampolski, YM Zalizovski, AV Groves, KM Moldwin, MB AF Sinitsin, VG Yampolski, YM Zalizovski, AV Groves, KM Moldwin, MB TI Spatial field structure and polarization of geomagnetic pulsations in conjugate areas SO JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS LA English DT Article DE geomagnetic pulsations; polarization; ionosphere; conjugate areas ID IONOSPHERIC CONTROL AB The ultra-low-frequency (ULF) geomagnetic pulsations observed at two nearly conjugate mid-latitude sites are examined to study their spatial structure and polarization, and learn about the role of ionospheric conductivity in forming their ground signatures. The data of 1999-2002 from Antarctica and New England (L of 2.4) are compared with the numerical results obtained in a simple plane model of ULF wave propagation through the ionosphere and atmosphere. The multi-layered model environment includes an anisotropic and parametrically time-dependent ionosphere, a uniform magnetosphere and a conducting Earth, all placed in a tilted geomagnetic field. The measured diurnal and seasonal variations in the orientation angle of the polarization ellipse are interpreted as effects of hydromagnetic wave propagation through the ionosphere and conversion to an electromagnetic field below. Essentially, the phase, amplitude and polarization of ULF waves observed at the ground are controlled by the wave's spatial structure in the magnetosphere and ionospheric transverse conductivities. the differences shown by the characteristics of simultaneous pulsations in conjugate areas arise mainly from different local ionospheric conditions, while the source waves of the pulsations are common to both sites. (C) 2003 Elsevier Ltd. All rights reserved. C1 Natl Acad Sci Ukraine, Natl Radio Astron, UA-61002 Kharkov, Ukraine. USAF, Res Lab, Hanscom AFB, MA 01731 USA. Univ Calif Los Angeles, IGPP, Los Angeles, CA 90095 USA. RP Sinitsin, VG (reprint author), Natl Acad Sci Ukraine, Natl Radio Astron, UA-61002 Kharkov, Ukraine. RI Moldwin, Mark/F-8785-2011 OI Moldwin, Mark/0000-0003-0954-1770 NR 11 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1364-6826 J9 J ATMOS SOL-TERR PHY JI J. Atmos. Sol.-Terr. Phys. PD JUL PY 2003 VL 65 IS 10 BP 1161 EP 1167 DI 10.1016/j.jastp.2003.08.001 PG 7 WC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences SC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences GA 735QB UT WOS:000186125100010 ER PT J AU Ly, JQ Bui-Mansfield, LT SanDiego, JW Beaman, NA Ficke, JR AF Ly, JQ Bui-Mansfield, LT SanDiego, JW Beaman, NA Ficke, JR TI Neural fibrolipoma of the foot SO JOURNAL OF COMPUTER ASSISTED TOMOGRAPHY LA English DT Article DE neural fibrolipoma; MR imaging; lipofibromatous hamartoma; perineural lipoma AB Neural fibrolipoma is a benign tumor comprised of hypertrophied fibrofatty tissue with intermixed nerve tissue. We present the case of a neural fibrolipoma of the foot that underwent above-ankle amputation and review the characteristic features of this unique form of localized gigantism. C1 Wilford Hall USAF Med Ctr, Dept Radiol, San Antonio, TX 78236 USA. USUHS, Dept Radiol, Bethesda, MD USA. Wake Forest Univ, Bowman Gray Sch Med, Dept Radiol, Winston Salem, NC USA. Wilford Hall USAF Med Ctr, Dept Pathol, San Antonio, TX 78236 USA. Brooke Army Med Ctr, Dept Pathol, San Antonio, TX USA. Brooke Army Med Ctr, Dept Orthoped Surg, San Antonio, TX USA. RP Ly, JQ (reprint author), Wilford Hall USAF Med Ctr, Dept Radiol, San Antonio, TX 78236 USA. NR 4 TC 5 Z9 8 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0363-8715 J9 J COMPUT ASSIST TOMO JI J. Comput. Assist. Tomogr. PD JUL-AUG PY 2003 VL 27 IS 4 BP 639 EP 640 DI 10.1097/00004728-200307000-00035 PG 2 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 707UL UT WOS:000184528200035 PM 12886159 ER PT J AU Goldstein, JT Ohmer, M Hegde, SM Pandey, R Burger, A Morgan, SH Chen, KT Chen, YF AF Goldstein, JT Ohmer, M Hegde, SM Pandey, R Burger, A Morgan, SH Chen, KT Chen, YF TI Optical properties of CdS0.2Se0.8 : V SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article; Proceedings Paper CT Workshop on Physics and Chemistry of II-VI Materials CY NOV 13-15, 2002 CL SAN DIEGO, CALIFORNIA SP USA, CECOM Night Vis & Elect Sensors Directorate, USA, Res Lab, USA, SMDC, USN, Electro Opt Ctr, Penn State Appl Res Lab, Off Naval Res, AF Res Lab, Miner, Mat & Mat Soc DE CdSxSe1-x; vanadium; birefringence; phase matching ID PARAMETRIC OSCILLATOR; REFRACTIVE INDICES; CDS CRYSTALS; MU-M; SPECTRA; BIREFRINGENCE; TRANSITION; LASER AB We report here a comparison between two methods for calculating the index of refraction of the CdSxSe1-x alloy system and a calculation of the phase-matching angles for second harmonic generation for this system. Analytical expressions for the index and the birefringence of all x values are presented. The low-temperature photoluminescence spectrum has been measured and reveals a native defect at 1.45 eV and a peak at 1.8 eV caused by the vanadium dopant, as well as an exciton peak at 2.24 eV. The transmission spectrum displays three peaks due to the vanadium dopant at 0.979 eV, 1.087 eV, and 1.181 eV. The birefringence has been measured for x = 0.2 from 1 mum to 14 mum and varies from 0.0185 to 0.0125. C1 USAF, Res Lab, MLPSO, Wright Patterson AFB, OH 45433 USA. Michigan Technol Univ, Houghton, MI 49931 USA. Fisk Univ, Dept Phys, Nashville, TN 37208 USA. RP Goldstein, JT (reprint author), USAF, Res Lab, MLPSO, Wright Patterson AFB, OH 45433 USA. NR 23 TC 0 Z9 0 U1 0 U2 2 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD JUL PY 2003 VL 32 IS 7 BP 783 EP 788 DI 10.1007/s11664-003-0071-9 PG 6 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA 703LW UT WOS:000184281700036 ER PT J AU Jin, O Lee, H Mall, S AF Jin, O Lee, H Mall, S TI Investigation into cumulative damage rules to predict fretting fatigue life of Ti-6Al-4V under two-level block loading condition SO JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME LA English DT Article ID INDEPENDENT PAD DISPLACEMENT; LOW-CYCLE FATIGUE; CRACK INITIATION; CONTACT PRESSURE; BEHAVIOR; STRESS AB The effects of variable amplitude loading on fretting fatigue behavior of titanium alloy, T-6Al-4V were examined. Fretting fatigue tests were carried out under constant stress amplitude and three different two-level block loading conditions: high-low (Hi-Lo), low-high (Lo-Hi), and repeated block of high and low stress amplitudes. The damage fractions and fretting fatigue lives were estimated by linear and non-linear cumulative damage rules. Damage curve analysis (DCA) and double linear damage rule (DLDR) were capable to account for the loading order effects in Hi-Lo and Lo-Hi loadings. In addition, the predictions by DCA and DLDR were better than that by linear damage rule (LDR). Besides its simplicity of implementation, LDR was also capable of estimating failure lives reasonably well. Repeated two-level block loading resulted in shorter lives and lower fretting fatigue limit compared to those under constant amplitude loading. The degree of reduction in fretting fatigue lives and fatigue strength depended on the ratio of cycles at lower stress amplitude to that at higher stress amplitude. Fracture surface of specimens subjected to Hi-Lo and repeated block loading showed the clear evidence of change in stress amplitude of applied load. Especially, the repeated two-level block loading resulted in characteristic markers which reflected change in crack growth rates corresponding to different stress amplitudes. C1 USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA. USAF, Mat & Mfg Directorate, AFRL MLLMN, Res Lab, Wright Patterson AFB, OH 45433 USA. RP Jin, O (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA. NR 24 TC 6 Z9 8 U1 0 U2 10 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0094-4289 J9 J ENG MATER-T ASME JI J. Eng. Mater. Technol.-Trans. ASME PD JUL PY 2003 VL 125 IS 3 BP 315 EP 323 DI 10.1115/1.1590998 PG 9 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA 708EU UT WOS:000184554800011 ER PT J AU Byrd, JE Adams, BJ AF Byrd, JE Adams, BJ TI Osteometric sorting of commingled human remains SO JOURNAL OF FORENSIC SCIENCES LA English DT Article DE forensic science; forensic anthropology; commingling; human osteology; osteometric sorting; regression analysis; CILHI ID ANTHROPOLOGY; ALLOMETRY; SIZE AB This paper describes the method of osteometric sorting. Osteometric sorting is the formal use of size and shape to sort bones from one another. The method relies heavily on measurement data and statistical models and is designed to maximize objectivity. The goal of this paper is to validate the use of osteometric sorting and to provide case examples of its utility. Selected regression models are also presented for use with osteometric sorting. We advocate this technique as one tool among many in the anthropologist's toolkit for sorting commingled skeletal remains. C1 USA, CILHI, Cent Identificat Lab, Hickam AFB, HI 96853 USA. RP Byrd, JE (reprint author), USA, CILHI, Cent Identificat Lab, 310 Worchester Ave, Hickam AFB, HI 96853 USA. NR 21 TC 19 Z9 19 U1 3 U2 16 PU AMER SOC TESTING MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 USA SN 0022-1198 J9 J FORENSIC SCI JI J. Forensic Sci. PD JUL PY 2003 VL 48 IS 4 BP 717 EP 724 PG 8 WC Medicine, Legal SC Legal Medicine GA 697HC UT WOS:000183935600004 PM 12877285 ER PT J AU Mitchell, JW Richardson, DL AF Mitchell, JW Richardson, DL TI Invariant manifold tracking for first-order nonlinear Hill's equations SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS LA English DT Article AB An approach to provide nonlinear active control for first-order nonlinear classical Hill's equations is described. Both linearized and nonlinear Hill's equations are controlled to remain close to specific invariant manifolds defined through the various system Hamiltonians. It is then shown that trajectories similar to the periodic trajectories of the linearized system can be maintained by the nonlinear equations on invariant manifolds defined by the linearized system of equations. Forcing the nonlinear system trajectories onto an invariant manifold of the linearized system, with an appropriate choice of initial conditions, provides a significant reduction in the along-track drift of first-order nonlinear Hill's equations as compared to linearized equations. There is also a small drift reduction in the radial coordinate direction. The cross-track position suffers only a slight increase in the maximum amplitude of its oscillation. C1 USAF, Res Lab, VACA,Control Theory Optimizat Branch, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. RP Mitchell, JW (reprint author), USAF, Res Lab, VACA,Control Theory Optimizat Branch, Air Vehicles Directorate, 2210 8th St, Wright Patterson AFB, OH 45433 USA. NR 9 TC 8 Z9 8 U1 0 U2 2 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 JUL-AUG PY 2003 VL 26 IS 4 BP 622 EP 627 DI 10.2514/2.5090 PG 6 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA 699ZA UT WOS:000184086500014 ER PT J AU Dahlke, SR AF Dahlke, SR TI Lunar gravitational capture conditions SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS LA English DT Article AB Certain classes of lunar trajectories allow spacecraft to approach the moon from outside its sphere of influence and to end up in a temporarily captured state around the moon without any thrusting necessary. The spacecraft's state at the moon associated with these efficient types of capture is investigated. First, analysis is done on objects approaching the moon from a direction that results in the lowest eccentricity at perilune. Following that, analysis is done on objects approaching the moon with trajectories that originate from the Earth. This second set of orbits are ballistic capture transfer trajectories that allow spacecraft to go from low Earth orbit to lunar capture with only one engine burn at Earth. The properties investigated provide insight to this particular form of transfer and can help in mission design. C1 USAF Acad, Dept Astronaut, Colorado Springs, CO 80840 USA. RP Dahlke, SR (reprint author), USAF Acad, Dept Astronaut, Colorado Springs, CO 80840 USA. NR 9 TC 1 Z9 1 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0731-5090 J9 J GUID CONTROL DYNAM JI J. Guid. Control Dyn. PD JUL-AUG PY 2003 VL 26 IS 4 BP 635 EP 642 DI 10.2514/2.5092 PG 8 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA 699ZA UT WOS:000184086500016 ER PT J AU Turell, MJ O'Guinn, ML Wasieloski, LP Dohm, DJ Lee, WJ Cho, HW Kim, HC Burkett, DA Mores, CN Coleman, RE Klein, TA AF Turell, MJ O'Guinn, ML Wasieloski, LP Dohm, DJ Lee, WJ Cho, HW Kim, HC Burkett, DA Mores, CN Coleman, RE Klein, TA TI Isolation of Japanese encephalitis and Getah viruses from mosquitoes (Diptera : Culicidae) collected near Camp Greaves, Gyonggi Province, Republic of Korea, 2000 SO JOURNAL OF MEDICAL ENTOMOLOGY LA English DT Article DE virus; isolation; mosquitoes; Korea; Japanese encephalitis; Getah ID POLYMERASE CHAIN-REACTION; CULEX-TRITAENIORHYNCHUS; SAGIYAMA VIRUS; ALPHAVIRUSES; INFECTION; THAILAND AB As part of an evaluation of the ecology of arthropod-borne diseases in the Republic of Korea (ROK), we examined 8,765 mosquitoes captured in Paju County, Gyonggi Province, ROK, for the presence of viruses. Mosquitoes were captured in propane lantern/human-baited Shannon traps, Mosquito Magnet traps, or American Biophysics Corporation (East Greenwich, RI) miniature light traps with or without supplemental octenol bait and/ or dry ice. Mosquitoes were identified to species, placed in pools of up to 40 mosquitoes each, and tested on Vero cells for the presence of virus. A total of 15 virus isolations were made from 293 pools of mosquitoes. Viruses were identified by reverse transcriptase-polymerase chain reaction and sequencing and consisted of 14 isolations of Japanese encephalitis (JE) virus and one isolation of Getah (GET) virus. All JE isolates were from Culex tritaeniorhynchus Giles, and the isolate of GET was from Aedes vexans (Meigen). The minimum field infection rate for JE in Cx. tritaeniorhynchus was 3.3 per 1,000, whereas the GET virus infection rate for Ae. vexans was 0.2 per 1,000. Isolation of JE and GET indicated that both viruses were actively circulating in northern Gyonggi Province, ROK. The lack of human cases of JE among the Korean population probably is because of an effective government-mandated vaccination program. The reason for no cases among >10,000 United States military and others that reside or train nearby is unknown, but may be related to personnel protection measures (permethrin-impregnated uniforms and use of deet repellent), adult mosquito control, mosquito selection of nonhuman hosts (unpublished data), and the low symptomatic to asymptomatic ratio of disease in adults. C1 USA, Med Res Inst Infect Dis, Div Virol, Ft Detrick, MD 21702 USA. USA, Med Res Inst Infect Dis, Diagnost Syst Div, Ft Detrick, MD 21702 USA. Natl Inst Hlth, Dept Viral Dis, Seoul 122701, South Korea. 5th Med Detachment, Med Battalion 168, Med Command 18, Unit 15247, APO, AP 96205 USA. USAF, Detachment 3, Inst Environm Safety & Occupat Hlth Risk Anal, APO, AP 96368 USA. Prevent Serv Directorate, Med Command 18, Unit 15281, APO, AP 96205 USA. RP Turell, MJ (reprint author), USA, Med Res Inst Infect Dis, Div Virol, 1425 Porter St, Ft Detrick, MD 21702 USA. EM michael.turell@det.amedd.army.mil RI Valle, Ruben/A-7512-2013 NR 25 TC 22 Z9 29 U1 2 U2 3 PU OXFORD UNIV PRESS INC PI CARY PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA SN 0022-2585 EI 1938-2928 J9 J MED ENTOMOL JI J. Med. Entomol. PD JUL PY 2003 VL 40 IS 4 BP 580 EP 584 DI 10.1603/0022-2585-40.4.580 PG 5 WC Entomology; Veterinary Sciences SC Entomology; Veterinary Sciences GA 705TJ UT WOS:000184410900032 PM 14680130 ER PT J AU Alexeenko, AA Gimelshein, SF Levin, DA Ketsdever, AD Ivanov, MS AF Alexeenko, AA Gimelshein, SF Levin, DA Ketsdever, AD Ivanov, MS TI Measurements and simulation of orifice flow for micropropulsion testing SO JOURNAL OF PROPULSION AND POWER LA English DT Article; Proceedings Paper CT 35th Thermophysics Conference CY JUN 11-14, 2001 CL ANAHEIM, CALIFORNIA AB Numerical and experimental results for a rarefied gas expansion through a thin circular orifice are presented. The orifice flow was used as a calibration test for a torsional thrust stand designed to measure force levels from 10(-6) to 10(-3) N. Molecular nitrogen, argon, and helium at room temperature are used as test gases. The mass flux and thrust measurements are compared with the direct simulation Monte Carlo results for Knudsen numbers from 40 to 0.01 and plenum to facility background pressure ratios of 10(3)-10(7). Factors that affect the total propulsive force, such as jet backflow and facility background gas penetrating the jet, are analyzed. The measured and calculated mass flux and total propulsive force were found to agree well for Knudsen numbers less than 1. C1 Penn State Univ, Dept Aerosp Engn, University Pk, PA 16802 USA. USAF, Res Lab, Edwards Air Force Base, CA 93524 USA. Inst Theoret & Appl Mech, Computat Aerodynam Lab, Novosibirsk 630090, Russia. RP Alexeenko, AA (reprint author), Penn State Univ, Dept Aerosp Engn, University Pk, PA 16802 USA. RI Alexeenko, Alina/B-7168-2011 NR 11 TC 15 Z9 15 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD JUL-AUG PY 2003 VL 19 IS 4 BP 588 EP 594 DI 10.2514/2.6170 PG 7 WC Engineering, Aerospace SC Engineering GA 701XC UT WOS:000184193400009 ER PT J AU Jacobsen, LS Gallimore, SD Schetz, JA O'Brien, WF Goss, LP AF Jacobsen, LS Gallimore, SD Schetz, JA O'Brien, WF Goss, LP TI Improved aerodynamic-ramp injector in supersonic flow SO JOURNAL OF PROPULSION AND POWER LA English DT Article; Proceedings Paper CT AIAA 39th Aerospace Sciences Meeting and Exhibits CY JAN 08-11, 2001 CL RENO, NEVADA SP Amer Inst Aeronaut & Astronaut ID HELIUM; SPEEDS AB An experimental study was performed in the, Virginia Polytechnic Institute and State University supersonic wind tunnel on a simplified and revised multiport aerodynamic-ramp. injector array in a supersonic flow. The new aerodynamic-ramp injector consisted of four flush-walled holes, in contrast to the original nine-hole versions. For comparison, a single, low downstream-angled circular injector hole was examined. Test conditions included sonic air injection into a Mach 2.4 air cross stream with an average Reynolds number of 4.2 x 10(7)/m at jet-to-freestream momentum flux ratios from 1.1 to 3.3. Shadowgraphs and surface oil-flow visualization pictures were taken in the vicinity of the injectors to gain a qualitative assessment of the injector flowfields. Quantitative measurements of the pressure field on the surface near injectors and in a cross-stream plane downstream were conducted using pressure-sensitive paint and pitot/cone-static probes, respectively. The mixing characteristics of the injectors at three downstream stations were quantified using total temperature probes and a combination of heated and unheated injected air profiles to generate a mixing analog to concentration. Results showed that the aerodynamic-ramp mixed faster and had a larger plume area than the single-hole injector, while sustaining somewhat higher pressure losses due to increased blockage and a higher downstream-angled injector arrangement. C1 Virginia Polytech Inst & State Univ, Dept Aerosp & Ocean Engn, Blacksburg, VA 24061 USA. Virginia Polytech Inst & State Univ, Dept Mech Engn, Blacksburg, VA 24061 USA. Innovat Sci Solut Inc, Dayton, OH 45440 USA. RP Jacobsen, LS (reprint author), USAF, Res Lab, Aerosp Prop Off, Wright Patterson AFB, OH 45433 USA. NR 31 TC 17 Z9 17 U1 2 U2 4 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD JUL-AUG PY 2003 VL 19 IS 4 BP 663 EP 673 DI 10.2514/2.6155 PG 11 WC Engineering, Aerospace SC Engineering GA 701XC UT WOS:000184193400019 ER PT J AU Miller, MD Larsen, KM Luke, T Leis, HT Plancher, KD AF Miller, MD Larsen, KM Luke, T Leis, HT Plancher, KD TI Anterior capsular shift volume reduction: An in vitro comparison of 3 techniques SO JOURNAL OF SHOULDER AND ELBOW SURGERY LA English DT Article ID MULTIDIRECTIONAL INSTABILITY; SHOULDER INSTABILITY; GLENOHUMERAL JOINT; BANKART PROCEDURE; DISLOCATION; INFERIOR; ARTHROGRAPHY; ARTHROTOMOGRAPHY; PRESSURE AB The anterior capsular shift is a well-established procedure for correction of capsular redundancy. Several different techniques have been developed to reduce capsular volume via a shift or capsulorrhaphy. The purpose of this study was to compare volume reduction objectively among 3 popular capsular shift techniques. Twenty-four fresh-frozen human cadaver shoulders were assigned to one of three groups: a lateral (humeral)-based T-capsulor shift (group A), a medial (glenoid)-based T-capsulor shift (group B), or a central vertical capsular shift (group C). Initial capsular volume was measured by repeated injection of a viscous fatty acid sulfate solution and recorded for each specimen. A predetermined capsular shift procedure was performed on each cadaver, and repeated measurements were made. All 3 procedures resulted in a significant reduction in capsular volume. The lateral (humeral)-based T-capsular shift resulted in the most reduction (48.9%). This reduction was statistically greater than for the glenoid-based shift (36.8% volume reduction) and approached statistical significance for the vertical shift (40.3% volume reduction, P = .12). Repeated measurements confirmed that the injection technique was valid and reproducible. The lateral (humeral)-based capsular shift results in the most volume reduction and should be considered the preferred procedure for patients with excessive capsular redundancy. C1 Univ Virginia, Dept Orthoped Surg, Charlottesville, VA USA. Albert Einstein Coll Med, Bronx, NY 10467 USA. Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. RP Miller, MD (reprint author), UVA Orthopaed, McCue Ctr, POB 800753,Emmet St & Massie Rd, Charlottesville, VA 22903 USA. NR 38 TC 15 Z9 15 U1 0 U2 0 PU MOSBY, INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 USA SN 1058-2746 J9 J SHOULDER ELB SURG JI J. Shoulder Elbow Surg. PD JUL-AUG PY 2003 VL 12 IS 4 BP 350 EP 354 DI 10.1016/S1058-2746(02)86805-7 PG 5 WC Orthopedics; Sport Sciences; Surgery SC Orthopedics; Sport Sciences; Surgery GA 714XM UT WOS:000184939600009 PM 12934029 ER PT J AU Rogers, JW Agnes, GS AF Rogers, JW Agnes, GS TI Modeling discontinuous axisymmetric active optical membranes SO JOURNAL OF SPACECRAFT AND ROCKETS LA English DT Article; Proceedings Paper CT AIAA/ASME/ASCE/AHS/ASC 43rd Structures, Structural Dynamics, and Materials Conference CY APR 22-25, 2002 CL DENVER, COLORADO SP AIAA, ASME, ASCE, AHS, ASC AB An active optical membrane is modeled as a laminate of inflatable structural material and piezopolymer sheets. Etching the electrode surfaces of each layer allows for selective actuation areas, which can be used to control surface regions independently. The analytical solution to a simplified axisymmetric system is discussed. The method of integral multiple scales is applied to the axisymmetric active membrane model and is studied. Results for both static and dynamic formulations are presented and indicate such a laminate can effectively deflect an optical membrane. C1 USAF, Res Lab, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA. USAF, Inst Technol, Dept Aeronaut & Astronaut Engn, Wright Patterson AFB, OH 45433 USA. RP Rogers, JW (reprint author), USAF, Res Lab, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA. NR 10 TC 6 Z9 7 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0022-4650 J9 J SPACECRAFT ROCKETS JI J. Spacecr. Rockets PD JUL-AUG PY 2003 VL 40 IS 4 BP 553 EP 564 DI 10.2514/2.3977 PG 12 WC Engineering, Aerospace SC Engineering GA 711XB UT WOS:000184765400012 ER PT J AU Naterer, GF Camberos, JA AF Naterer, GF Camberos, JA TI Entropy and the second law fluid flow and heat transfer simulation SO JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER LA English DT Article; Proceedings Paper CT AIAA 35th Thermophysics Conference CY JUN 11-14, 2001 CL ANAHEIM, CA SP Amer Inst Aeronaut & Astronaut ID FINITE-DIFFERENCE METHODS; PHASE-CHANGE COMPUTATIONS; NAVIER-STOKES EQUATIONS; NUMERICAL PREDICTIONS; INTERFACE TRACKING; CONSERVATION-LAWS; GENERATION; APPROXIMATIONS; FORMULATION; ANALOGIES AB A review of the diverse roles of entropy and the second law in computational thermo-fluid dynamics is presented. Entropy computations are related to numerical error, convergence criteria, time-step limitations, and other significant aspects of computational fluid flow and heat transfer. The importance of the second law as a tool for estimating error bounds and the overall scheme's robustness is described. As computational methods become more reliable and accurate, emerging applications involving the second law in the design of engineering thermal fluid systems are described. Sample numerical results are presented and discussed for a multitude of applications in compressible flows, as well as problems with phase change heat transfer. Advantages and disadvantages of different entropy-based methods are discussed, as well as areas of importance suggested for future research. C1 Univ Manitoba, Dept Mech & Ind Engn, Winnipeg, MB R3T 2N2, Canada. USAF, Res Lab, Wright Patterson Air Force Base, Wright Patterson AFB, OH 45433 USA. RP Univ Manitoba, Dept Mech & Ind Engn, 15 Gillson St, Winnipeg, MB R3T 2N2, Canada. NR 85 TC 22 Z9 22 U1 0 U2 2 PU AMER INST AERONAUTICS ASTRONAUTICS PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0887-8722 EI 1533-6808 J9 J THERMOPHYS HEAT TR JI J. Thermophys. Heat Transf. PD JUL-SEP PY 2003 VL 17 IS 3 BP 360 EP 371 DI 10.2514/2.6777 PG 12 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA 701XE UT WOS:000184193600010 ER PT J AU Boyer, KM O'Brien, WF AF Boyer, KM O'Brien, WF TI Improved streamline curvature approach for off-design analysis of transonic axial compression systems SO JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME LA English DT Article; Proceedings Paper CT International Gas Turbine and Aeroengine Congress and Exhibition CY JUN 03-06, 2002 CL AMSTERDAM, NETHERLANDS DE transonic; compressor; streamline curvature; loss; deviation AB A streamline curvature throughflow numerical approach is assessed and modified to better approximate the flow fields of transonic axial compression systems. Improvements in total pressure loss modeling are implemented, central to which is a physics-based shock model, to ensure accurate and reliable off-design performance prediction. The new model accounts for shock geometry changes, with shock loss estimated as a Junction of inlet relative Much number, blade section loading (flow turning), solidity, leading edge radius, and suction surface profile. Data from a single-stage, isolated rotor provide the basis for expert. mental comparisons. Improved performance prediction is shown. The importance of properly accounting for shock geometry and loss changes with operating conditions is demonstrated. C1 USAF Acad, Dept Aeronaut, Colorado Springs, CO 80840 USA. Virginia Tech, Dept Mech Engn, Blacksburg, VA 24061 USA. RP Boyer, KM (reprint author), USAF Acad, Dept Aeronaut, Colorado Springs, CO 80840 USA. NR 26 TC 7 Z9 10 U1 0 U2 1 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0889-504X J9 J TURBOMACH JI J. Turbomach.-Trans. ASME PD JUL PY 2003 VL 125 IS 3 BP 475 EP 481 DI 10.1115/1.1565085 PG 7 WC Engineering, Mechanical SC Engineering GA 718QE UT WOS:000185157300008 ER PT J AU Syed, S Furman, J Nalesnik, JG Basler, J AF Syed, S Furman, J Nalesnik, JG Basler, J TI Sweet's syndrome associated with squamous cell carcinoma of the bladder SO JOURNAL OF UROLOGY LA English DT Editorial Material DE Sweet's syndrome; carcinoma, squamous cell; bladder C1 Univ Texas, Hlth Sci Ctr, Dept Surg, Div Urol, San Antonio, TX 78229 USA. Univ Texas, Hlth Sci Ctr, Dept Med, Div Med Oncol, San Antonio, TX 78229 USA. Univ Texas, Hlth Sci Ctr, Dept Pathol, San Antonio, TX 78229 USA. Wilford Hall USAF Med Ctr, Dept Urol, Lackland AFB, TX 78236 USA. RP Basler, J (reprint author), Univ Texas, Hlth Sci Ctr, Dept Surg, Div Urol, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA. NR 3 TC 2 Z9 2 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0022-5347 J9 J UROLOGY JI J. Urol. PD JUL PY 2003 VL 170 IS 1 BP 180 EP 181 DI 10.1097/01.ju.0000071660.22843.a5 PG 2 WC Urology & Nephrology SC Urology & Nephrology GA 691FB UT WOS:000183593800049 PM 12796678 ER PT J AU Leedy, KD Cortez, R Ebel, JL Strawser, RE Walker, AP DeSalvo, GC Young, RM AF Leedy, KD Cortez, R Ebel, JL Strawser, RE Walker, AP DeSalvo, GC Young, RM TI Metallization schemes for radio frequency microelectfornechanical system switches SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A LA English DT Article; Proceedings Paper CT 49th International Symposium of the American-Vacuum-Society CY NOV 03-08, 2002 CL DENVER, COLORADO SP Amer Vacuum Soc ID THERMAL-EXPANSION; RESIDUAL-STRESS; ELASTIC-MODULUS; MEMS SWITCHES; THIN-FILMS; RF MEMS; COEFFICIENT; BEHAVIOR AB A series of surface micromachined microelectromechanical system switches with composite metal beams were fabricated by standard photolithographic techniques. The study was conducted in order to assess the influence of film stress and composition on the released shape of cantilever and fixed-fixed beam structures. A 1 mum thick evaporated Au film was the basis for all bridge materials with additional 20 nm layers of evaporated or sputter deposited Ti, Pt, W, or Au on the top or bottom surface of the thick Au. The planarity and stress gradient of cantilever beam structures and the planarity of fixed-fixed beam structures were measured by optical interferometry. Gold-only bridge structures displayed the best planarity of those examined while structures with Ti layers displayed the least planarity. Cantilever stress gradients calculated using both cantilever-tip deflection and radius of curvature techniques were typically between 9 and 16 MPa/mum. The thin film biaxial moduli used in stress gradient calculations were measured using a wafer curvature technique and were slightly higher than the bulk Au value. Results of this study show that thin metal layers (2%-6% of total beam thickness) have substantial influence on released beam curvatures but that beam planarity can be achieved with a suitable combination of materials. (C) 2003 American Vacuum Society. C1 USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA. Northrop Grumman Corp, Baltimore, MD 21203 USA. RP Leedy, KD (reprint author), USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA. NR 18 TC 5 Z9 5 U1 0 U2 2 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 JUL-AUG PY 2003 VL 21 IS 4 BP 1172 EP 1177 DI 10.1116/1.1560714 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 705RU UT WOS:000184409200055 ER PT J AU Lu, WJ Mitchel, WC Landis, GR Crenshaw, TR Collins, WE AF Lu, WJ Mitchel, WC Landis, GR Crenshaw, TR Collins, WE TI Electrical contact behavior of Ni/C60/4H-SiC structures SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A LA English DT Article; Proceedings Paper CT 49th International Symposium of the American-Vacuum-Society CY NOV 03-08, 2002 CL DENVER, CO SP Amer Vacuum Soc ID AMORPHOUS-CARBON; OHMIC CONTACTS; CATALYTIC GRAPHITIZATION; RAMAN-SPECTRA; FILMS; C-60; DECOMPOSITION; TEMPERATURE; ADSORPTION; NANOTUBES AB A C60 interfacial layer between a Ni film and SiC improves the Ohmic contact properties significantly. The C60 film is deposited by the Langmuir-Blodgett method prior to the Ni film deposition on SiC using dc sputtering. High quality Ohmic contacts of Ni/C60/4H-SiC are formed after annealing at 800 degreesC in Ar for 2 h with a specific contact resistivity of 1.17 x 10(-6) Omega cm(2) on SiC with a doping concentration of 1.8 x 10(19) cm(-3). Raman spectra reveal that Ohmic contacts are formed after C60 is decomposed and converted to graphitic states. The formation of Ohmic contacts and the graphitic structures in the annealed film of Ni/C60/SiC are similar to that of Ni/C/SiC, for which the Ni catalytic graphitization effects play the determining role in forming Ohmic contacts on SiC., Scanning electron microscopy images show a direct relationship between the graphitized morphological features on the films and Ohmic contact behavior. (C) 2003 American Vacuum Society. C1 Fisk Univ, Dept Phys, Nashville, TN 37208 USA. USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Univ Dayton, Res Inst, Dayton, OH 45469 USA. RP Lu, WJ (reprint author), Fisk Univ, Dept Phys, Nashville, TN 37208 USA. EM wlu@fisk.edu NR 37 TC 4 Z9 5 U1 1 U2 5 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 JUL-AUG PY 2003 VL 21 IS 4 BP 1510 EP 1514 DI 10.1116/1.1572167 PG 5 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 705RU UT WOS:000184409200118 ER PT J AU Vipperman, JS Li, DY Avdeev, I Lane, SA AF Vipperman, JS Li, DY Avdeev, I Lane, SA TI Investigation of the sound transmission into an advanced grid-stiffened structure SO JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME LA English DT Article ID THIN CYLINDRICAL-SHELL AB The noise transmission behavior of an advanced grid-stiffened (AGS) composite structure has been investigated by combining numerical and experimental methods. Structural-acoustic coupling was found to be light, permitting separate analysis of the structure and acoustic cavity. Finite element analysis permitted the resonant frequencies of acoustic cavity and structure to be calculated, which play an important role for noise transmission through the structure. Acoustic mode shapes permitted internal coincidence frequencies to be estimated and provided insight into modal pressure distributions, when considering payload location. Experimental structural and acoustic modal analysis permitted the resonant frequencies and damping ratios for the structure and cavity to be determined, which in turn were used to corroborate the FEA model. Finally, direct measurement of the noise transmission was performed based on noise reduction spectrum (NRS), which is calculated from spatial averages of the RMS acoustic pressures inside and outside of the shell. It was found that the NRS was dominated by acoustic resonances, which were marked by sharp dips in the NRS curve. Internal coincidence of the axial wavenumbers was also found to be a significant mechanism for noise transmission. External coincidence and ring frequencies were found to provide less of an impact on the overall NRS for the structure. C1 Univ Pittsburgh, Dept Mech Engn, Pittsburgh, PA 15261 USA. USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA. RP Vipperman, JS (reprint author), Univ Pittsburgh, Dept Mech Engn, Pittsburgh, PA 15261 USA. NR 20 TC 9 Z9 9 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 1048-9002 J9 J VIB ACOUST JI J. Vib. Acoust.-Trans. ASME PD JUL PY 2003 VL 125 IS 3 BP 257 EP 266 DI 10.1115/1.1569511 PG 10 WC Acoustics; Engineering, Mechanical; Mechanics SC Acoustics; Engineering; Mechanics GA 700VG UT WOS:000184131400003 ER PT J AU Anttonen, JSR King, PI Beran, PS AF Anttonen, JSR King, PI Beran, PS TI POD-based reduced-order models with deforming grids SO MATHEMATICAL AND COMPUTER MODELLING LA English DT Article DE proper orthogonal decomposition; reduced order modeling; deforming grid AB Proper orthogonal decomposition based reduced order modeling (POD/ROM) is examined with deforming grids. POD/ROM is a technique that operates in an index-space for computations, not typically accounting for grid dynamics. Two model problems are presented to demonstrate the method of accounting for the effects of grid deformation on POD/ROM. The analytical solution of flow about an oscillating cylinder and potential flow over an oscillating panel. The accuracy and robustness of POD/ROM on deforming grids are compared to that of rigid grid POD/ROM. Deforming grid POD/ROMs are found to require more modes than rigid grid POD/ROMs for similar accuracy levels. In addition, for deforming grids, POD/ROMs are less accurate when the grid deformation is significantly altered from the deformations seen in the POD/ROM development. To address these issues, a new technique is developed that compares the relative grid motion between the POD/ROM creation and execution. The technique determines the current relative grid deformation and selects the best POD/ROM from those available. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 USAF, Inst Technol, Dept Aeronaut & Astronaut Engn, Wright Patterson AFB, OH 45433 USA. USAF, Inst Technol, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA. RP Anttonen, JSR (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut Engn, Wright Patterson AFB, OH 45433 USA. NR 13 TC 17 Z9 17 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0895-7177 J9 MATH COMPUT MODEL JI Math. Comput. Model. PD JUL PY 2003 VL 38 IS 1-2 BP 41 EP 62 DI 10.1016/S0895-7177(03)00191-2 PG 22 WC Computer Science, Interdisciplinary Applications; Computer Science, Software Engineering; Mathematics, Applied SC Computer Science; Mathematics GA 721JX UT WOS:000185314200005 ER PT J AU Grady, B AF Grady, B TI Untitled SO MILITARY MEDICINE LA English DT Letter C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. RP Grady, B (reprint author), Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA SN 0026-4075 J9 MIL MED JI Milit. Med. PD JUL PY 2003 VL 168 IS 7 BP V EP V PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA 743AM UT WOS:000186550300001 PM 12901455 ER PT J AU Lyuksyutov, SF Vaia, RA Paramonov, PB Juhl, S Waterhouse, L Ralich, RM Sigalov, G Sancaktar, E AF Lyuksyutov, SF Vaia, RA Paramonov, PB Juhl, S Waterhouse, L Ralich, RM Sigalov, G Sancaktar, E TI Electrostatic nanolithography in polymers using atomic force microscopy SO NATURE MATERIALS LA English DT Article ID DATA-STORAGE; LITHOGRAPHY; FILMS; NANOSTRUCTURES; MILLIPEDE; ARRAYS C1 Univ Akron, Dept Phys, Akron, OH 44325 USA. Univ Akron, Dept Polymer Engn, Akron, OH 44325 USA. USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. RP Lyuksyutov, SF (reprint author), Univ Akron, Dept Phys, Akron, OH 44325 USA. RI Paramonov, Pavel/I-6090-2013; OI Paramonov, Pavel/0000-0002-3163-4319; Waterhouse, Lynn/0000-0002-7455-7632; Sancaktar, Erol/0000-0003-0165-587X NR 28 TC 145 Z9 147 U1 3 U2 39 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 1476-1122 J9 NAT MATER JI Nat. Mater. PD JUL PY 2003 VL 2 IS 7 BP 468 EP 472 DI 10.1038/nmat926 PG 5 WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 696ND UT WOS:000183892200021 PM 12819776 ER PT J AU Lane-Davies, A Lantz, JL Winter, LW Benton, JM AF Lane-Davies, A Lantz, JL Winter, LW Benton, JM TI Index of suspicion SO PEDIATRICS IN REVIEW LA English DT Article C1 Michigan State Univ, Kalamazoo Ctr Med Studies, Childrens Hosp, Kalamazoo, MI 49008 USA. Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. Pediat Brevard, Rockledge, FL USA. RP Lane-Davies, A (reprint author), Michigan State Univ, Kalamazoo Ctr Med Studies, Childrens Hosp, Kalamazoo, MI 49008 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ACAD PEDIATRICS PI ELK GROVE VILLAGE PA 141 NORTH-WEST POINT BLVD,, ELK GROVE VILLAGE, IL 60007-1098 USA SN 0191-9601 J9 PEDIATR REV JI Pediatr. Rev. PD JUL PY 2003 VL 24 IS 7 BP 233 EP 239 PG 7 WC Pediatrics SC Pediatrics GA 746DD UT WOS:000186730500003 ER PT J AU Cheng, F Zhong, XL Gogineni, S Kimmel, RL AF Cheng, F Zhong, XL Gogineni, S Kimmel, RL TI Magnetic-field effects on second-mode instability of a weakly ionized Mach 4.5 boundary layer SO PHYSICS OF FLUIDS LA English DT Article ID NUMERICAL-SIMULATION; TRANSITION; STABILITY AB This paper investigates, by numerical simulation, the effects of an imposed magnetic field on a weakly ionized Mach 4.5 boundary layer. The main emphasis of the study is on magnetohydrodynamic (MHD) effects on the second mode instability in supersonic boundary layer. The imposed magnetic fields are generated by placing two-dimensional magnetic dipoles below the flat plate surface. The gas is assumed to have a constant electrical conductivity of 100 mho/m. The magnetic Reynolds number of the flow is small so that the induced magnetic field in the flow is neglected. The governing equations of the MHD flow, which are the Navier-Stokes equations with the applied magnetic force terms, are computed by a fifth-order shock-fitting numerical scheme. A series of cases with different imposed magnetic fields have been investigated on the influences of imposed magnetic field on both the mean flow and on the second mode stability. It is found that the imposed magnetic fields significantly retard the streamwise velocity and reduce the local skin friction in the mean flow. For the case of a strong imposed magnetic field, a local separation region is generated in the mean flow with a strong adverse pressure gradient. Meanwhile, the second mode wave disturbances are found to be stabilized by the imposed magnetic fields, even for the case with strong adverse pressure gradient and a local separated flow region. This strong overall stabilization of the second mode wave is believed to be caused by the alteration of the steady base flow by the magnetic field. The results presented in this paper are the first concrete results on the interaction of second instability mode with magnetic field in a supersonic boundary layer. (C) 2003 American Institute of Physics. C1 Univ Calif Los Angeles, Dept Mech & Aerosp Engn, Los Angeles, CA 90095 USA. Innovat Sci Solut Inc, Dayton, OH 45440 USA. USAF, Res Lab, Air Vehicles Directorate, Dayton, OH 45433 USA. RP Zhong, XL (reprint author), Univ Calif Los Angeles, Dept Mech & Aerosp Engn, Los Angeles, CA 90095 USA. NR 43 TC 2 Z9 2 U1 1 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-6631 J9 PHYS FLUIDS JI Phys. Fluids PD JUL PY 2003 VL 15 IS 7 BP 2020 EP 2040 DI 10.1063/1.1577565 PG 21 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 689AU UT WOS:000183470100018 ER PT J AU Rothwell, PL AF Rothwell, PL TI The superposition of rotating and stationary magnetic sources: Implications for the auroral region SO PHYSICS OF PLASMAS LA English DT Article ID PARALLEL ELECTRIC-FIELDS; LARGE-SCALE; EARTHS MAGNETOSPHERE; ION PRECIPITATION; STATISTICAL-MODEL; LINE RESONANCES; CUSP; PLASMA; ACCELERATION; GEOMETRY AB Magnetohydrodynamic theory has been widely and successfully applied to explain many aspects of magnetospheric behavior. In particular, it has been used to predict where and when field-aligned auroral currents of electrons and ions will flow between the magnetosphere and ionosphere. On the other hand, in the auroral region, precipitating particles with energies of many keV are observed and are widely presumed to have been accelerated by field-aligned electric fields, which have been observed directly. These observations imply that additional plasma and/or external processes are present. In this report, an expression for the field-aligned electric field due to the superposition of the Earth's rotating magnetic dipole and a stationary magnetic source is derived and evaluated at various locations throughout the magnetosphere. The results show a striking agreement with both the location and the energies of precipitating ions observed over a two-year period by the Defense Meteorological Satellite Program and also agrees with the size of the auroral oval as measured by ultraviolet data from the Viking satellite. The degree and characteristics of this agreement suggest that the parallel electric field associated with the rotating magnetic dipole is indeed present, is not canceled by polarization effects, and is a prime cause of energetic-ion precipitation. C1 USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. RP Rothwell, PL (reprint author), USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. NR 41 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 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD JUL PY 2003 VL 10 IS 7 BP 2971 EP 2977 DI 10.1063/1.1582473 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 691BT UT WOS:000183585500040 ER PT J AU Baek, JB Tan, LS AF Baek, JB Tan, LS TI Improved syntheses of poly(oxy-1,3-phenylenecarbonyl-1,4-phenylene) and related poly(ether-ketones) using polyphosphoric acid/P2O5 as polymerization medium SO POLYMER LA English DT Article DE poly(phosphoric acid); poly(ether-ketones); AB monomer ID ACID; SULFONES AB Based on the model-compound studies, the composition of polyphosphoric acid (PPA)/P2O5 mixture as an effective catalytic/dehydrative medium for the preparation of poly(ether-ketones) was optimized. Thus, with the optimal weight ratio of 4:1 (PPA:P2O5), the electrophilic substitution polycondensation of 3-phenoxybenzoic acid and related AB monomers was substantially promoted at 130 degreesC to yield the subject polymer abbreviated as mPEK and related poly(ether-ketones) with significantly higher molecular weights. In the cases where the polymerization systems were completely homogeneous, the ensuing polycondensation was rapid and yielded high molecular weight polymers (e.g. mPEK [eta] = 2.10 dl/g) at 130 degreesC within 30 min., as compared to PPMA (phosphorus pentoxide/methanesulfonic acid) method which gave only moderate molecular weight polymers, e.g. mPEK ([eta] = 0.64 dl/g). In some cases, where the monomers and PPA/P2O5 were not fully compatible, polycondensation did proceed and reasonable molecular weight range ([eta] = 0.69-0.76 dl/g) could be achieved. However, the complete incompatibility between the poly(ether-sulfone) and PPA/P2O5 medium precluded the successful polymerization of 4-phenoxybenzenesulfonic acid. Published by Elsevier Science Ltd. C1 USAF, Res Lab, MLBP, Mat & Mfg Directorate,Polymer Branch, Wright Patterson AFB, OH 45433 USA. Univ Dayton, Res Inst, Dayton, OH 45469 USA. RP Tan, LS (reprint author), USAF, Res Lab, MLBP, Mat & Mfg Directorate,Polymer Branch, 2941 P St,Room 136, Wright Patterson AFB, OH 45433 USA. RI Baek, Jong-Beom/E-5883-2010; Tan, Loon-Seng/F-6985-2012 OI Baek, Jong-Beom/0000-0003-4785-2326; Tan, Loon-Seng/0000-0002-2134-9290 NR 27 TC 46 Z9 46 U1 0 U2 9 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0032-3861 J9 POLYMER JI Polymer PD JUL PY 2003 VL 44 IS 15 BP 4135 EP 4147 DI 10.1016/S0032-3861(03)00374-4 PG 13 WC Polymer Science SC Polymer Science GA 695TH UT WOS:000183846100009 ER PT J AU Cummings, RM Forsythe, JR Morton, SA Squires, KD AF Cummings, RM Forsythe, JR Morton, SA Squires, KD TI Computational challenges in high angle of attack flow prediction SO PROGRESS IN AEROSPACE SCIENCES LA English DT Review ID DETACHED-EDDY SIMULATIONS; TURBULENT VORTICAL FLOWS; NAVIER-STOKES SOLUTIONS; TRANSITION PREDICTION; OGIVE CYLINDER; SLENDER BODIES; ASYMMETRIES; ALGORITHM; EQUATIONS; LAYERS AB Aircraft aerodynamics have been predicted using computational fluid dynamics for a number of years. While viscous flow computations for cruise conditions have become commonplace, the non-linear effects that take place at high angles of attack are much more difficult to predict. A variety of difficulties arise when performing these computations, including challenges in properly modeling turbulence and transition for vortical and massively separated flows, the need to use appropriate numerical algorithms if flow asymmetry is possible, and the difficulties in creating grids that allow for accurate simulation of the flowfield. These issues are addressed and recommendations are made for further improvements in high angle of attack flow prediction. Current predictive capabilities for high angle of attack flows are reviewed, and solutions based on hybrid turbulence models are presented. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Calif Polytech State Univ San Luis Obispo, Dept Aerosp Engn, San Luis Obispo, CA 93407 USA. USAF Acad, Dept Aeronaut, Colorado Springs, CO 80840 USA. Arizona State Univ, Dept Mech & Aerosp Engn, Tempe, AZ 85287 USA. RP Cummings, RM (reprint author), Calif Polytech State Univ San Luis Obispo, Dept Aerosp Engn, San Luis Obispo, CA 93407 USA. NR 53 TC 34 Z9 36 U1 0 U2 8 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0376-0421 J9 PROG AEROSP SCI JI Prog. Aeosp. Sci. PD JUL PY 2003 VL 39 IS 5 BP 369 EP 384 DI 10.1016/S0376-0421(03)00041-1 PG 16 WC Engineering, Aerospace SC Engineering GA 693QV UT WOS:000183730600002 ER PT J AU Haymond, J West, JE AF Haymond, J West, JE TI Class action extraction? SO PUBLIC CHOICE LA English DT Article AB Class action lawsuits as a vehicle of rent extraction is developed as an extension of political/legislative rent extraction theory. An event study is performed on thirty firms in which a securities class action lawsuit is filed and subsequently resolved by retraction, settlement, or legal verdict. The data set is found to be consistent with rent having been extracted as a result of the class action lawsuit. C1 Off Legislat Liaison, Washington, DC 20330 USA. USAF Acad, Dept Econ & Geog, Colorado Springs, CO 80840 USA. RP Haymond, J (reprint author), Off Legislat Liaison, 1160 Air Force Pentagon, Washington, DC 20330 USA. OI West, James/0000-0002-1454-2113 NR 14 TC 3 Z9 3 U1 0 U2 4 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0048-5829 J9 PUBLIC CHOICE JI Public Choice PD JUL PY 2003 VL 116 IS 1-2 BP 91 EP 108 DI 10.1023/A:1024217319541 PG 18 WC Economics; Political Science SC Business & Economics; Government & Law GA 690TD UT WOS:000183564500006 ER PT J AU Dentamaro, AV Dao, PD AF Dentamaro, AV Dao, PD TI Pulsed photoacoustic calibration of a differential absorption water vapor lidar SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article AB We have designed and constructed a photoacoustic (PA) cell to be used for wavelength calibration in a water vapor differential absorption lidar (DIAL) system. This system will be used to remotely determine atmospheric H2O16 concentrations. The accuracy of these measurements depends critically on the ability to tune to and detune from lines in the water vapor spectrum. Specifically, the signal-to-noise ratio of the PA signal must be strong enough to locate the center frequency of an absorption line with accuracy and repeatability better than 0.2 times the Lorentzian half width of the absorption (0.1 cm-1). So, although it represents only a peripheral part of the DIAL experiment, the calibration provided by the PA cell is critical to its overall success. In the environment of a mobile lidar system, problems with mechanical and electronic noise are potentially greater than those in a typical laboratory setting, and the cell is designed to address this situation. The PA cell utilizes a "figure-8" beam tunnel geometry which partially separates the tunnel into two subchambers, each with a microphone mounted in it. The laser beam is allowed to pass through only one of these subchambers. The microphone in the side that receives the laser beam records both PA signal and background noise, while the other microphone records only background noise. A differential lowpass filter and microphone amplifier circuit, of a design dedicated to this application, uses the output of the two microphones to subtract the background noise from the PA signal. The PA cell described within is of simple mechanical design and is constructed at very little cost. (C) 2003 American Institute of Physics. C1 USAF, Res Lab, VSBL, Hanscom AFB, MA 01731 USA. Visidyne Inc, Burlington, MA 01803 USA. RP Dao, PD (reprint author), USAF, Res Lab, VSBL, 29 Randolph Rd, Hanscom AFB, MA 01731 USA. NR 6 TC 0 Z9 0 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 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD JUL PY 2003 VL 74 IS 7 BP 3502 EP 3506 DI 10.1063/1.1582382 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 694CP UT WOS:000183756500041 ER PT J AU Pirzada, M Grimes, RW Maguire, JF AF Pirzada, M Grimes, RW Maguire, JF TI Incorporation of divalent ions in A(2)B(2)O(7) pyrochlores SO SOLID STATE IONICS LA English DT Article DE pyrochlore; ionic transport; binding energy; doping; simulation ID DEFECT CLUSTER FORMATION; ELECTRONIC CONDUCTION; DISORDER; TITANATE; OXIDES; MIGRATION; GD2TI2O7; DOPANTS; SYSTEM; RADII AB Oxides with the pyrochlore structure are currently being considered for use in electrochemical devices. As their ionic conductivity must be enhanced by extrinsic doping, it is important to establish the relative ability of pyrochlore compounds to accommodate dopant ions. Here atomistic simulation is used to examine this issue by predicting the energies and structures associated with the incorporation of a range of divalent ions over an extensive pyrochlore compositional range. Results indicate that such dopant ions substitute primarily at A-cation sites with oxygen vacancy compensation, resulting in non-stoichiometric pyrochlore. We also find that the energy to form an oxygen Frenkel pair adjacent to a divalent ion is practically near zero. Both solution and defect clustering binding energies vary significantly as a function of composition. (C) 2003 Elsevier B.V. All rights reserved. C1 Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England. Air Force Res Lab, AFRL MLMR, Wright Patterson AFB, OH 45433 USA. RP Grimes, RW (reprint author), Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England. NR 41 TC 23 Z9 23 U1 3 U2 14 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2738 J9 SOLID STATE IONICS JI Solid State Ion. PD JUL PY 2003 VL 161 IS 1-2 BP 81 EP 91 DI 10.1016/S0167-2738(03)00165-6 PG 11 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 720KX UT WOS:000185260900010 ER PT J AU Pearton, SJ Norton, DP Ip, K Heo, YW Steiner, T AF Pearton, SJ Norton, DP Ip, K Heo, YW Steiner, T TI Recent progress in processing and properties of ZnO SO SUPERLATTICES AND MICROSTRUCTURES LA English DT Review ID P-TYPE ZNO; CHEMICAL-VAPOR-DEPOSITION; DILUTED MAGNETIC SEMICONDUCTORS; INDUCTIVELY-COUPLED PLASMA; BAND-GAP SEMICONDUCTORS; PULSED-LASER DEPOSITION; MOLECULAR-BEAM EPITAXY; TI/AU OHMIC CONTACTS; SINGLE-CRYSTAL ZNO; OXIDE THIN-FILMS AB ZnO is attracting considerable attention for its possible application to UV light emitters, spin functional devices, gas sensors, transparent electronics and surface acoustic wave devices. There is also interest in integrating ZnO with other wide bandgap ceramic semiconductors such as the AlInGaN system. In this paper we summarize recent progress in doping control, materials processing methods such as dry etching and ohmic and Schottky contact formation, new understanding of the role of hydrogen and finally the prospects for control of ferromagnetism in transition metal-doped ZnO. (C) 2003 Elsevier Ltd. All rights reserved. C1 Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA. USAF, Off Sci Res, Arlington, VA 22217 USA. RP Pearton, SJ (reprint author), Univ Florida, Dept Mat Sci & Engn, POB 116400, Gainesville, FL 32611 USA. EM spear@mse.ufl.edu RI Mote, Rakesh/A-9534-2009 NR 152 TC 241 Z9 255 U1 7 U2 104 PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0749-6036 J9 SUPERLATTICE MICROST JI Superlattices Microstruct. PD JUL-AUG PY 2003 VL 34 IS 1-2 BP 3 EP 32 DI 10.1016/S0749-6063(03)00093-4 PG 30 WC Physics, Condensed Matter SC Physics GA 832LH UT WOS:000222268500002 ER PT J AU Phillips, BS Zabinski, JS AF Phillips, BS Zabinski, JS TI Frictional characteristics of quasicrystals at high temperatures SO TRIBOLOGY LETTERS LA English DT Article DE friction; high temperature; icosahedral; quasicrystal; tribology; wear ID QUASI-CRYSTALLINE COATINGS; TRIBOLOGICAL PROPERTIES; PHASE; WEAR AB AlCuFe quasicrystal coatings were deposited by unbalanced magnetron sputtering for study of their friction and wear properties at high temperatures. It has been shown that growth and annealing conditions can be controlled to produce icosahedral quasicrystal or the approximant cubic phase. The comparison of friction and wear properties between quasicrystal and an approximant with nearly the same stoichiometry permits assessment of the unique quasicrystalline structure for tribological applications. The goals of this study are to determine how crystal structure influences tribological properties and to study the general friction and wear behavior of quasicrystals. Tribological properties were evaluated using a pin-on-disk tribometer and crystal structure was characterized using an X-ray diffractometer. The tests specimens were 10 mum thick films deposited on a 1" diameter steel disk and a 1/4" diameter steel ball. Data was collected over a range of temperatures from room to 600 degreesC. Friction coefficients and wear rates of quasicrystals and approximants were nearly identical for room temperature tests. The wear process generated Al, Cu, Fe, and oxide debris on the side of the track, but overall wear was mild. The friction coefficient of the icosahedral phase was 25% lower than the cubic phase at 150 thru 450 degreesC. Generally, only moderate differences in the friction and wear properties were observed between the icosahedral quasicrystal phase and the cubic phase. C1 Systran Fed Corp, Dayton, OH 45431 USA. USAF, Res Labs, Mat & Mfg Directorate, Nonmetall Mat Div,Nonstruct Mat Branch, Wright Patterson AFB, OH 45433 USA. RP Phillips, BS (reprint author), Systran Fed Corp, 4027 Colonel Glenn Highway,Suite 210, Dayton, OH 45431 USA. NR 23 TC 6 Z9 7 U1 1 U2 8 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1023-8883 J9 TRIBOL LETT JI Tribol. Lett. PD JUL PY 2003 VL 15 IS 1 BP 57 EP 64 DI 10.1023/A:1023464123583 PG 8 WC Engineering, Chemical; Engineering, Mechanical SC Engineering GA 668WQ UT WOS:000182318500008 ER PT J AU Shaeffer, SK AF Shaeffer, SK TI High temperature reaction of aryl phosphate esters on an iron film SO TRIBOLOGY TRANSACTIONS LA English DT Article DE vapor phase lubrication; phosphate esters; auger electron spectroscopy (AES); surface films; coatings ID VAPOR-PHASE LUBRICATION; METAL-FILMS; OXIDES AB The reaction between vaporous aryl phosphate esters and iron is known to yield a lubricious product film at high temperatures. The rate law exhibited in the growth of this film is consistent with a diffusion controlled process. In this work the actual movement of elements during this growth process was characterized using composite metal foil samples consisting of a 1,000 A iron film deposited on a platinum substrate. The interface between the platinum and iron served as a. reference datum against which the movement of the elements was measured. Iron was found to be the solitary mobile element in the product growth process. A Boltzman-Matano analysis was applied to the iron concentration-depth profile of the product to assess the diffusivity of the iron during the product growth. In this case the diffusivity of iron was found to be greater than its self diffusivity but less than its diffusivity in magnetite. The data suggests that the diffusivity of iron across the iron/product interface is the rate controlling step in the product growth process. C1 USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. RP Shaeffer, SK (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. NR 25 TC 1 Z9 1 U1 0 U2 1 PU SOC TRIBOLOGISTS & LUBRICATION ENGINEERS PI PARK RIDGE PA 840 BUSSE HIGHWAY, PARK RIDGE, IL 60068 USA SN 1040-2004 J9 TRIBOL T JI Tribol. Trans. PD JUL PY 2003 VL 46 IS 3 BP 332 EP 338 DI 10.1080/10402000308982634 PG 7 WC Engineering, Mechanical SC Engineering GA 704XW UT WOS:000184367800007 ER PT J AU Ren, WJ Mall, S Sanders, JH Sharma, SK AF Ren, WJ Mall, S Sanders, JH Sharma, SK TI Degradation of Cu-Al coating on Ti-6Al-4V substrate under fretting fatigue conditions SO TRIBOLOGY TRANSACTIONS LA English DT Article; Proceedings Paper CT ASME/STLE Tribology Conference CY OCT 27-30, 2002 CL CANCUN, MEXICO SP ASME, STLE DE coatings; fretting; fatigue; self-lubrication; degradation ID CRACK INITIATION AB The degradation process of a Cu-Al coating on Ti-6Al-4V substrate was investigated under fretting and fretting fatigue loading conditions. Wear and coefficient of friction (COF) of the coating were investigated as a function of fretting and fretting fatigue cycles. Damage of the coating was also characterized using scanning electron microscopy, energy dispersive spectrometry, and profilometery. COF decreased due to self-lubrication effects from the debris formation under fretting and fretting fatigue loading conditions. At a given normal load applied to fretting pad, coating wear increased with the increasing number of cycles and applied load to the specimen, with the lowest wear occurring under fretting loading conditions. C1 Systran Fed Corp, Dayton, OH 45431 USA. USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. RP Ren, WJ (reprint author), Systran Fed Corp, Dayton, OH 45431 USA. NR 15 TC 9 Z9 9 U1 4 U2 7 PU SOC TRIBOLOGISTS & LUBRICATION ENGINEERS PI PARK RIDGE PA 840 BUSSE HIGHWAY, PARK RIDGE, IL 60068 USA SN 1040-2004 J9 TRIBOL T JI Tribol. Trans. PD JUL PY 2003 VL 46 IS 3 BP 353 EP 360 DI 10.1080/10402000308982637 PG 8 WC Engineering, Mechanical SC Engineering GA 704XW UT WOS:000184367800010 ER PT J AU Sandhu, SS Crowther, RO Krishnan, SC Fellner, JP AF Sandhu, SS Crowther, RO Krishnan, SC Fellner, JP TI Direct methanol polymer electrolyte fuel cell modeling: reversible open-circuit voltage and species flux equations SO ELECTROCHIMICA ACTA LA English DT Article; Proceedings Paper CT 8th International Symposium on Polymer Electrolytes CY MAY 19-24, 2002 CL SANTA FE, NEW MEXICO SP USA, Res Off, USN, Res Off, US DOE DE direct methanol fuel cell; open-circuit voltage; fluid nonideal behavior; phase and electrochemical reaction equilibria; transport fluxes ID SIMULATION AB By the application of thermodynamic fundamentals of phase and electrochemical reaction equilibria, a mathematical equation has been developed to predict the reversible open-circuit voltage of a direct methanol fuel cell (DMFC), in the absence of electrode poisoning and methanol crossover. The equation accounts for the effect of the nonideal behavior of the fluid phases on the reversible open-circuit voltage. Sample computed results are presented. The species (CH3OH, H2O, H+) flux equations to compute molar fluxes through the polymer electrolyte membrane of a DMFC are also presented. Published by Elsevier Science Ltd. C1 Univ Dayton, Dept Chem & Mat Engn, Dayton, OH 45469 USA. USAF, Propuls Directorate, Wright Patterson AFB, OH 45433 USA. RP Sandhu, SS (reprint author), Univ Dayton, Dept Chem & Mat Engn, 300 Coll Pk, Dayton, OH 45469 USA. NR 13 TC 6 Z9 6 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0013-4686 J9 ELECTROCHIM ACTA JI Electrochim. Acta PD JUN 30 PY 2003 VL 48 IS 14-16 BP 2295 EP 2303 DI 10.1016/S0013-4686(03)00218-4 PG 9 WC Electrochemistry SC Electrochemistry GA 701NX UT WOS:000184174600049 ER PT J AU Rizzetta, DP Visbal, MR Blaisdell, GA AF Rizzetta, DP Visbal, MR Blaisdell, GA TI A time-implicit high-order compact differencing and filtering scheme for large-eddy simulation SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS LA English DT Article DE high-order numerical method; large-eddy simulation; compact finite-difference scheme; subgrid-stress model ID SUBGRID-SCALE MODEL; TURBULENT CHANNEL FLOW; COMPRESSIBLE TURBULENCE; REYNOLDS-NUMBER; BOUNDARY-LAYER; DYNAMIC-MODEL; WALL REGION; SHEAR FLOWS; BACKSCATTER AB This work investigates a high-order numerical method which is suitable for performing large-eddy simulations, particularly those containing wall-bounded regions which are considered on stretched curvilinear meshes. Spatial derivatives are represented by a sixth-order compact approximation that is used in conjunction with a tenth-order non-dispersive filter. The scheme employs a time-implicit approximately factored finite-difference algorithm, and applies Newton-like subiterations to achieve second-order temporal and sixth-order spatial accuracy. Both the Smagorinsky and dynamic subgrid-scale stress models are incorporated in the computations, and are used for comparison along with simulations where no model is employed. Details of the method are summarized, and a series of classic validating computations are performed. These include the decay of compressible isotropic turbulence, turbulent channel flow, and the subsonic flow past a circular cylinder. For each of these cases, it was found that the method was robust and provided an accurate means of describing the flowfield, based upon comparisons with previous existing numerical results and experimental data. Published in 2003 by John Wiley Sons. Ltd. C1 USAF, Wright Patterson AFB, OH 45433 USA. Purdue Univ, W Lafayette, IN 47907 USA. RP Rizzetta, DP (reprint author), AFRL VAAC, Bldg 146,Room 225,2210 8th St, Wright Patterson AFB, OH 45433 USA. NR 55 TC 73 Z9 74 U1 2 U2 10 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 0271-2091 J9 INT J NUMER METH FL JI Int. J. Numer. Methods Fluids PD JUN 30 PY 2003 VL 42 IS 6 BP 665 EP 693 DI 10.1002/fld.551 PG 29 WC Computer Science, Interdisciplinary Applications; Mathematics, Interdisciplinary Applications; Mechanics; Physics, Fluids & Plasmas SC Computer Science; Mathematics; Mechanics; Physics GA 689CP UT WOS:000183474300005 ER PT J AU Antonova, N Firstov, SA Miracle, DB AF Antonova, N Firstov, SA Miracle, DB TI Investigation of phase equilibria in the Ti-Al-Si-Nb system at low Nb contents SO ACTA MATERIALIA LA English DT Article DE titanium alloys; metal matrix composites (MMC); silicides; microstructure; phase transformations; eutectic solidification ID MICROSTRUCTURE; SILICON; ALLOYS AB Phase equilibria in the alpha/alpha(2) phase region of the Ti-Al-Si-Nb system at Nb content 2.5, 3.5 and 5 at.% were studied in alloys as-cast and heat-treated at 800 degreesC. Samples were prepared by arc-melting technique, homogenized at 1350 degreesC and then heat-treated at 800 degreesC, followed by ice water cooling. The structure of the alloys was characterized by means of X-Ray diffraction, differential thermal analysis, electron probe microanalysis, scanning electron microscopy and transmission electron microscopy. The continuous solid solutions with variable compositions (Ti(1-x),Nb(x))(3)(Si(1-y)Al(y)) (eta) (0.05less than or equal toxless than or equal to0.07, 10(-3)less than or equal toyless than or equal to0.02) was detected at 800 degreesC for the first time in the multi-component alloys based upon the Ti-Si system. It was stabilized by Nb additions in the alloys with low Al content. A peritectoid reaction beta + alpha-->eta was observed. Additions of Al neutralized the stabilizing effect of Nb resulting in an alpha + Ti(5)Si(3) (z) equilibrium. (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. C1 Natl Acad Sci Ukraine, Inst Problems Mat Sci, UA-03680 Kiev, Ukraine. USAF, Res Lab, Mat & Mfg Directorate, MLLM, Dayton, OH 45433 USA. RP Antonova, N (reprint author), Natl Acad Sci Ukraine, Inst Problems Mat Sci, 5 Krzhizhanovskiy Str, UA-03680 Kiev, Ukraine. EM nataliyaant@msn.com NR 19 TC 8 Z9 9 U1 0 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD JUN 27 PY 2003 VL 51 IS 11 BP 3095 EP 3107 DI 10.1016/S1359-6454(03)00121-6 PG 13 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 692KW UT WOS:000183661100006 ER PT J AU Bhushan, B Paquet, L Halasz, A Spain, JC Hawari, J AF Bhushan, B Paquet, L Halasz, A Spain, JC Hawari, J TI Mechanism of xanthine oxidase catalyzed biotransformation of HMX under anaerobic conditions SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article DE biotransformation; cyclic nitramine; HMX; N-denitration; xanthine oxidase ID SP STRAIN DN22; NITRIC-OXIDE; OCTAHYDRO-1,3,5,7-TETRANITRO-1,3,5,7-TETRAZOCINE HMX; ANOXIC TISSUES; N-DENITRATION; RDX; REDUCTION; HEXAHYDRO-1,3,5-TRINITRO-1,3,5-TRIAZINE; OXIDOREDUCTASE; BIODEGRADATION AB Enzyme catalyzed biotransformation of the energetic chemical octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) is not known. The present study describes a xanthine oxidase (XO) catalyzed biotransformation of HMX to provide insight into the biodegradation pathway of this energetic chemical. The rates of biotransformation under aerobic and anaerobic conditions were 1.6 +/- 0.2 and 10.5 +/- 0.9 nmol h(-1) mg protein(-1), respectively, indicating that anaerobic conditions favored the reaction. The biotransformation rate was about 6-fold higher using NADH as an electron-donor compared to xanthine. During the course of reaction, the products obtained were nitrite (NO(2)(-)), methylenedinitramine (MDNA), 4-nitro-2,4-diazabutanal (NDAB), formaldehyde (HCHO), nitrous oxide (N(2)O), formic acid (HCOOH), and ammonium (NH(4)(+)). The product distribution gave carbon and nitrogen mass-balances of 91% and 88%, respectively. A comparative study with native-, deflavo-, and desulfo-XO and the site-specific inhibition studies showed that HMX biotransformation occurred at the FAD-site of XO. Nitrite stoichiometry revealed that an initial single N-denitration step was sufficient for the spontaneous decomposition of HMX. Crown Copyright (C) 2003 Published by Elsevier Science (USA). All rights reserved. C1 Natl Res Council Canada, Biotechnol Res Inst, Montreal, PQ H4P 2R2, Canada. USAF, Res Lab, Tyndall AFB, FL 32403 USA. RP Hawari, J (reprint author), Natl Res Council Canada, Biotechnol Res Inst, 6100 Royalmount Ave, Montreal, PQ H4P 2R2, Canada. EM jalal.hawari@nrc.ca NR 27 TC 24 Z9 29 U1 0 U2 11 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0006-291X J9 BIOCHEM BIOPH RES CO JI Biochem. Biophys. Res. Commun. PD JUN 27 PY 2003 VL 306 IS 2 BP 509 EP 515 DI 10.1016/S0006-291X(03)01001-5 PG 7 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 693TQ UT WOS:000183734800030 PM 12804594 ER PT J AU Mozer, JB Briggs, WM AF Mozer, JB Briggs, WM TI Skill in real-time solar wind shock forecasts SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE solar wind shock forecasts; Hakamada-Akasofu-Fry solar wind model; forecast skill ID ARRIVAL AB [1] Forecasts of 96 shocks in the solar wind at the L1 point made by the HAF kinematic solar wind model made between 5 February and 31 December 2001 are compared with algorithmically determined shocks from real-time data from the SWEPAM and MAG instruments aboard the ACE spacecraft. Traditional measures of forecast skill used by the meteorological community are applied to these forecasts and observations and indicate modest skill in the HAF model. Details of forecast skill are determined using the Briggs-Ruppert skill score which incorporates the costs of forecast error. This new metric is shown by the present example to be a potentially valuable tool to the customer of space weather forecasts in that it focuses on the actual application of the forecasts and identifies economic regimes where a given forecast is potentially valuable. C1 USAF, Res Lab, Space Vehicles Directorate, Sunspot, NM 88349 USA. Cornell Univ, Weill Med Coll, New York, NY 10021 USA. RP USAF, Res Lab, Space Vehicles Directorate, POB 62, Sunspot, NM 88349 USA. EM jmozer@nso.edu; wib2004@med.cornell.edu NR 23 TC 17 Z9 17 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9380 EI 2169-9402 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD JUN 27 PY 2003 VL 108 IS A6 AR 1262 DI 10.1029/2003JA009827 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 708WR UT WOS:000184593600002 ER PT J AU Akdim, B Pachter, R Duan, XF Adams, WW AF Akdim, B Pachter, R Duan, XF Adams, WW TI Comparative theoretical study of single-wall carbon and boron-nitride nanotubes SO PHYSICAL REVIEW B LA English DT Article ID DER-WAALS INTERACTIONS; ELASTIC PROPERTIES; FIELD-EMISSION; YOUNGS MODULUS; ROPES; TEMPERATURE; SPECTRA AB We present a comprehensive comparative study of properties of BN and C nanotubes using a full potential linear combination of atomic orbitals approach, as well as a planewave pseudopotential method. This paper covers our results on the structural, mechanical, vibrational, and electronic properties, examining in detail the effects of intertube coupling. Structural aspects and mechanical properties are discussed and compared in BN and C nanotubes, and to experiment. Upshifts in the values of the radial breathing modes, due to intertube coupling, are found to be small and systematic, about 2% in zigzag nanotubes, and varying from 2 to 7 % in armchair tubes, for both materials. Finally, the effects of intertube interactions on the van Hove singularities are discussed. C1 USAF, Res Lab, Mat & Mfg Directorate, AFRL MLPJ, Wright Patterson AFB, OH 45433 USA. Major Shared Resource Ctr High Performance Comp, ASC HP, Wright Patterson AFB, OH 45433 USA. Rice Univ, Ctr Nanoscale Sci & Technol, Houston, TX 77005 USA. RP Akdim, B (reprint author), USAF, Res Lab, Mat & Mfg Directorate, AFRL MLPJ, Wright Patterson AFB, OH 45433 USA. RI Adams, Wade/A-7305-2010 NR 52 TC 108 Z9 111 U1 2 U2 19 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JUN 27 PY 2003 VL 67 IS 24 AR 245404 DI 10.1103/PhysRevB.67.245404 PG 8 WC Physics, Condensed Matter SC Physics GA 701UD UT WOS:000184186600057 ER PT J AU Huang, DH Cardimona, DA AF Huang, DH Cardimona, DA TI Nonadiabatic effects in a self-consistent Hartree model for electrons under an ac electric field in multiple quantum wells SO PHYSICAL REVIEW B LA English DT Article ID INFRARED PHOTODETECTORS; SUPERLATTICES; OSCILLATIONS; TEMPERATURE; WAVES AB By deriving a dynamical differential equation for the electron distribution function in the presence of a nonadiabatic sequential-tunneling current under an ac electric field through a multiple-quantum-well system, the self-consistent Hartree model is generalized for the calculation of electronic states with the inclusion of nonadiabatic effects (dependence on the time derivative of the applied ac electric field) in quantum wells. The influences of different doping profiles, temperatures, and amplitudes of an applied ac electric field on the electron distribution function and sequential tunneling are studied. This work provides a fully quantum-mechanical explanation to the previously proposed current-surge model to a leading-order approximation. C1 USAF, Res Lab, AFRO VSSS, Kirtland AFB, NM 87117 USA. RP Huang, DH (reprint author), USAF, Res Lab, AFRO VSSS, 3550 Aberdeen Ave SE,Bldg 426, Kirtland AFB, NM 87117 USA. NR 22 TC 3 Z9 3 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JUN 27 PY 2003 VL 67 IS 24 AR 245306 DI 10.1103/PhysRevB.67.245306 PG 10 WC Physics, Condensed Matter SC Physics GA 701UD UT WOS:000184186600034 ER PT J AU Glavicic, MG Kobryn, PA Bieler, TR Semiatin, SL AF Glavicic, MG Kobryn, PA Bieler, TR Semiatin, SL TI An automated method to determine the orientation of the high-temperature beta phase from measured EBSD data for the low-temperature alpha-phase in Ti-6Al-4V SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE titanium; phase transformations; burgers relation; texture; electron-backscatter-diffraction ID TI-64 SHEET; TRANSFORMATION AB An automated method to determine the orientation of the high-temperature beta phase from measured electron-backscatter-diffraction (EBSD) data for the low-temperature alpha-phase in Ti-6Al-4V was developed to provide a solution for multiple prior-beta grains within a single data set. This technique is an improvement over existing methods because it does not require a priori knowledge of the variant selection process or the location of prior-beta grain boundaries, and it can transform an arbitrary field of EBSD data containing the variants from many prior-beta grains in a single calculation. It is a general method and therefore can be used to examine texture relationships in materials other than Ti-6Al-4V which undergo a burgers-type phase transformation. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Universal Energy Syst Inc, Dayton, OH 45432 USA. USAF, Res Lab, Mat & Mfg Directorate, AFRL MLLMP, Wright Patterson AFB, OH 45433 USA. Michigan State Univ, Dept Mat Sci & Mech, E Lansing, MI 48824 USA. RP Glavicic, MG (reprint author), Universal Energy Syst Inc, 4401 Dayton Xenia Rd, Dayton, OH 45432 USA. RI SEMIATIN, SHELDON/E-7264-2017 NR 9 TC 43 Z9 44 U1 0 U2 18 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD JUN 25 PY 2003 VL 351 IS 1-2 BP 258 EP 264 AR PII S0921-5093(02)00844-4 DI 10.1016/S0921-5093(02)00844-4 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 675UL UT WOS:000182714500029 ER PT J AU Crooker, NU Larson, DE Kahler, SW Lamassa, SM Spence, HE AF Crooker, NU Larson, DE Kahler, SW Lamassa, SM Spence, HE TI Suprathermal electron isotropy in high-beta solar wind and its role in heat flux dropouts SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID INTERPLANETARY MAGNETIC-FIELD; PLASMA; SPACECRAFT; SHEETS; SUN AB [1] Time variations in plasma beta and a parameter which measures isotropy in suprathermal electron pitch angle distributions show a remarkably close correspondence throughout the solar wind. The finding implies that high-beta plasma, with its multiple magnetic holes and sharp field and plasma gradients, is conducive to electron pitch-angle scattering, which reduces heat flux from the Sun without field-line disconnection. Thus the finding impacts our understanding of signatures we use to determine magnetic topology in the heliosphere. C1 Boston Univ, Ctr Space Phys, Boston, MA 02215 USA. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. USAF, Res Lab, Hanscom AFB, MA USA. RP Crooker, NU (reprint author), Boston Univ, Ctr Space Phys, Boston, MA 02215 USA. EM crooker@bu.edu RI Spence, Harlan/A-1942-2011 NR 21 TC 26 Z9 26 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 EI 1944-8007 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD JUN 20 PY 2003 VL 30 IS 12 AR 1619 DI 10.1029/2003GL017036 PG 4 WC Geosciences, Multidisciplinary SC Geology GA 693XG UT WOS:000183743200003 ER PT J AU Albert, JM AF Albert, JM TI Evaluation of quasi-linear diffusion coefficients for EMIC waves in a multispecies plasma SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE EMIC waves; pitch angle diffusion; quasi-linear diffusion coefficients; outer radiation belt ID ION-CYCLOTRON WAVES; PITCH-ANGLE DIFFUSION; PARTICLE INTERACTIONS; RESONANT INTERACTIONS; PROTON PRECIPITATION; GEOMAGNETIC STORMS; HEAVY-IONS; OMEGA-HE; ELECTRONS; MAGNETOSPHERE AB [1] Quasi-linear velocity- space diffusion coefficients due to L-mode electromagnetic ion cyclotron (EMIC) waves are considered in a multispecies plasma. It is shown, with slight approximations to exact cold plasma theory, that within EMIC pass bands the index of refraction is a monotonically increasing function of frequency. Analytical criteria are then derived which identify ranges of latitude, wavenormal angle, and resonance number consistent with resonance in a prescribed wave population. This leads to computational techniques which allow very efficient calculation of the diffusion coefficients, along the lines previously developed for whistler and ion cyclotron waves in an electron-proton plasma. The techniques are applied to radiation belt electrons at L = 4, for EMIC waves in the hydrogen, helium, and oxygen bands representative of different phases of a magnetic storm. Finally, diffusion coefficients for recovery-phase helium-band EMIC waves are combined with those for typical whistler hiss, resulting in electron precipitation lifetimes substantially less than those due to hiss alone. C1 Boston Coll, Inst Sci Res, Chestnut Hill, MA 02467 USA. USAF, Res Lab, Hanscom AFB, MA USA. RP Albert, JM (reprint author), Boston Coll, Inst Sci Res, Chestnut Hill, MA 02467 USA. OI Albert, Jay/0000-0001-9494-7630 NR 29 TC 171 Z9 172 U1 0 U2 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD JUN 20 PY 2003 VL 108 IS A6 AR 1249 DI 10.1029/2002JA009792 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 696JR UT WOS:000183884300006 ER PT J AU Huang, CS Foster, JC Goncharenko, LP Sofko, GJ Borovsky, JE Rich, FJ AF Huang, CS Foster, JC Goncharenko, LP Sofko, GJ Borovsky, JE Rich, FJ TI Midlatitude ionospheric disturbances during magnetic storms and substorms SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE storms; substorms; ionospheric disturbances; middle latitude ID MAGNETOSPHERIC SUBSTORMS; MILLSTONE-HILL; F-REGION; GEOMAGNETIC DISTURBANCES; PLASMA CONVECTION; ELECTRIC-FIELDS; NEUTRAL WINDS; LOW LATITUDES; MIDDLE; MARCH AB [1] We present periodic (similar to2 hour) magnetospheric and ionospheric oscillations observed with multiple space-based and ground-based instruments during the severe magnetic storm of 25 September 1998. Periodic particle injections were observed at geosynchronous orbit. Ground magnetometers registered very large, as high as 3000 nT, magnetic deviations in the nightside auroral zone. The Millstone Hill incoherent scatter radar at magnetic latitude 55degrees measured periodic enhancements of ionospheric eastward ion velocity from midnight to similar to1000 MLT. The periodic variations in the magnetometers and Millstone Hill radar were well correlated with the magnetospheric particle injections. The observations are consistent with the occurrence of periodic magnetospheric substorms during a magnetic storm. During each substorm cycle the ionospheric auroral zone expanded to the latitude of the Millstone Hill radar, so the radar was periodically within the auroral zone and detected the auroral plasma return flows. After substorm activity stopped, the Millstone Hill radar measured near-noon in-phase periodic oscillations of the ionospheric F-region electron density and temperature, which may be due to particle precipitation from the ring current and/or plasmasphere into the midlatitude ionosphere. We suggest that magnetospheric substorms during magnetic storms have a cycle time of similar to2 hours. The magnetosphere can sustain similar oscillations for several cycles even though the substorm activity has stopped. All the observed periodic variations in the geosynchronous particle injections, in the auroral magnetic deviations, and in the ionospheric ion velocity are related to the periodic magnetospheric substorms and oscillations. C1 MIT, Haystack Observ, Westford, MA 01886 USA. Univ Saskatchewan, Inst Space & Atmospher Studies, Saskatoon, SK S7N 5E2, Canada. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. USAF, Res Lab, Hanscom AFB, MA 01731 USA. RP Huang, CS (reprint author), MIT, Haystack Observ, Route 40, Westford, MA 01886 USA. NR 40 TC 22 Z9 22 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD JUN 20 PY 2003 VL 108 IS A6 AR 1244 DI 10.1029/2002JA009608 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 696JR UT WOS:000183884300002 ER PT J AU Setzler, SD Stevens, KT Fernelius, NC Scripsick, MP Edwards, GJ Halliburton, LE AF Setzler, SD Stevens, KT Fernelius, NC Scripsick, MP Edwards, GJ Halliburton, LE TI Electron paramagnetic resonance and electron-nuclear double-resonance study of Ti3+ centres in KTiOPO4 SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID POTASSIUM TITANYL PHOSPHATE; FLUX-GROWN KTIOPO4; GRAY-TRACKING; LASER DAMAGE; HOLE CENTER; CRYSTALS; IDENTIFICATION; DEFECTS; IMPURITIES AB Electron paramagnetic resonance and electron-nuclear double resonance have been used to characterize four V, centres in undoped crystals of potassium titanyl phosphate (KTiOPO4 or KTP). These 3d(1) defects (S = 1/2) are produced by ionizing radiation (either 66 kV x-rays or 355 nm photons from a tripled Nd:YAG laser), and form when the regular Ti4+ ions in the crystal trap an electron. Two of these trapped-electron I centres are only observed in hydrothermally grown KTP and the other two are dominant in flux-grown KTP. Both of the Ti3+ centres in hydrothermally grown crystals have a neighbouring proton (i.e. an OH- molecule). In the flux-grown crystals, one of the Ti3+ centres is adjacent-to an oxygen vacancy and the other centre is tentatively attributed to a self-trapped electron (i.e. a Ti3+ centre with no stabilizing entity nearby). The g matrix and phosphorus hyperfine matrices are determined for all four Ti3+ centres, and the proton hyperfine matrix is. determined for the two centres associated with OH- ions. These Ti3+ centres contribute to the formation of the grey tracks often observed in KTP crystals used to generate the second harmonic of high-power, near-infrared lasers. C1 W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA. BAE Syst, Nashua, NH 03061 USA. Northrop Grumman Space Technol Synopt, Charlotte, NC 28273 USA. USAF, Res Lab, Mat & Mfg Directorate, AFRL MLPSO, Wright Patterson AFB, OH 45433 USA. Nova Phase, Newton, NJ 07860 USA. RP Halliburton, LE (reprint author), W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA. NR 24 TC 17 Z9 18 U1 1 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD JUN 18 PY 2003 VL 15 IS 23 BP 3969 EP 3984 AR PII S0953-8984(03)59449-8 DI 10.1088/0953-8984/15/23/310 PG 16 WC Physics, Condensed Matter SC Physics GA 698RQ UT WOS:000184012900014 ER PT J AU Agarwal, G Naik, RR Stone, MO AF Agarwal, G Naik, RR Stone, MO TI Immobilization of histidine-tagged proteins on nickel by electrochemical dip pen nanolithography SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID COILED-COIL PROTEIN; MICROSCOPY; ADSORPTION; COLLAGEN; BINDING; INK AB Dip-pen nanolithography (DPN) is becoming a popular technique to "write" molecules on a surface by using the tip of an atomic force microscope (AFM) coated with the desired molecular "ink". In this work, we demonstrate that poly-histidine-tagged peptides and proteins, and free-base porphyrins coated on AFM probes, can be chelated to ionized regions on a metallic nickel surface by applying an electric potential to the AFM tip in the DPN process. DPN has been accomplished in the Tapping Mode of AFM, which creates many possible applications of positioning and subsequently imaging biomolecules, especially on soft surfaces. C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Tech Management Concepts Inc, Beavercreek, OH 45434 USA. RP Stone, MO (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. RI Agarwal, Gunjan/E-2616-2011; OI Agarwal, Gunjan/0000-0003-3731-2107 NR 29 TC 102 Z9 105 U1 2 U2 21 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD JUN 18 PY 2003 VL 125 IS 24 BP 7408 EP 7412 DI 10.1021/ja029856p PG 5 WC Chemistry, Multidisciplinary SC Chemistry GA 689QB UT WOS:000183503500050 PM 12797815 ER PT J AU Natarajan, LV Shepherd, CK Brandelik, DM Sutherland, RL Chandra, S Tondiglia, VP Tomlin, D Bunning, TJ AF Natarajan, LV Shepherd, CK Brandelik, DM Sutherland, RL Chandra, S Tondiglia, VP Tomlin, D Bunning, TJ TI Switchable holographic polymer-dispersed liquid crystal reflection gratings based on thiol-ene photopolymerization SO CHEMISTRY OF MATERIALS LA English DT Article ID INDUCED PHASE-SEPARATION; MORPHOLOGY; DISPLAYS; KINETICS; PDLC AB Holographic reflection gratings in polymer-dispersed liquid crystals (H-PDLCs) were formed by thiol-ene photopolymerization. Using UV laser light and a single prism, electrically switchable reflection gratings in blue, green, yellow, and red colors were fabricated. Results indicate that thiol-ene polymers function as better hosts for H-PDLC than multifunctional acrylate as matrixes. These differences are the result of a much different temporal structure development caused by fundamental differences in the polymerization propagation mechanism: a step-growth addition mechanism for the thiol-ene system compared to a chain-growth addition mechanism in multifunctional acrylates. Morphology studies by TEM support these conclusions, as striking differences in droplet shape and uniformity are observed. Discrete nematic droplets with a nearly spherical shape were seen. Thiol-ene polymers offer lower switching fields, higher diffraction efficiencies, better optical properties, and higher thermal stabilities. The response times of the thiol-ene gratings were five times slower than those of acrylates. C1 Sci Applicat Int Corp, Dayton, OH 45431 USA. USAF, Mat & Mfg Directorate, MLPJ, Wright Patterson AFB, OH 45433 USA. Tech Management Concepts Inc, Beavercreek, OH 45433 USA. RP Natarajan, LV (reprint author), Sci Applicat Int Corp, 4031 Colonel Glenn Highway, Dayton, OH 45431 USA. NR 29 TC 140 Z9 141 U1 6 U2 52 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD JUN 17 PY 2003 VL 15 IS 12 BP 2477 EP 2484 DI 10.1021/cm021824d PG 8 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 689DE UT WOS:000183475700027 ER PT J AU Baek, JB Ferguson, JB Tan, LS AF Baek, JB Ferguson, JB Tan, LS TI Room-temperature free-radical-induced polymerization of 1,1 '-(methylenedi-1,4-phenylene)bismaleimide via a novel diphenylquinoxaline-containing hyperbranched aromatic polyamide SO MACROMOLECULES LA English DT Article ID POLY(ARYL ETHER PHENYLQUINOXALINES); DIRECT POLYCONDENSATION; EPOXY-RESINS; MAIN-CHAIN; NUCLEOPHILIC-SUBSTITUTION; QUINOXALINE; COPOLYMERS; POLYMERS; POLY(PHENYLQUINOXALINE)S; TOUGHENERS AB Two new diphenylquinoxaline-containing AB(2) monomers, 2,3-bis(4-aminophenyl)quinoxaline-6-carboxylic acid, 5, and 2,3-bis[4-(4-aminophenoxy)phenyllquinoxaline-6-carboxylic acid, 9, were prepared and polymerized via the Yamazaki reaction to form the hyperbranched aromatic polyamides (designated as II and III, respectively) with -NH2 as the reactive chain-end groups. Although these AB2 monomers and their respective hyperbranched polymers are structurally similar except for the presence of a p-phenyloxy spacer between the quinoxaline and p-aminophenyl segments in 9 and III, the physical and chemical properties of both monomers and hyperbranched polymers are distinctly different. It is believed that the tautomerism in 5 and II is likely the basis for these differences. Since III was only marginally soluble in polar aprotic solvents in which II readily dissolved, a known, soluble hyperbranched polyamide (1) was prepared from 3,5-bis(4-aminophenyloxy)benzoic acid for comparison purposes in a subsequent blends study. The curing behaviors and thermal properties of the hyperbranched polyamides I and II blended in 0.75-3.75 wt % with a common bismaleimide [1,1'-(methylenedi-4,1-phenylene)bismaleimide, BMI] resin were studied with differential scanning calorimetry (DSC) and Fourier transform infrared (FT-IR) spectroscopy. Whereas the DSC results indicated that I reacted normally with BMI in a Michael-addition fashion, followed by homopolymerization of the excess BMI, II appeared to be able to initiate free radical polymerization of BMI at room temperature after co-dissolution with BMI in N-methyl-2-pyrrolidinone. The DSC results of the BMI/II blends indicated that, at greater than or equal to 1.5 wt % of II, no exotherm attributable to the thermal curing of BMI was detected. Electron spin resonance (ESR) experiments confirmed that the parmagnetic species present in II were more reactive toward BMI in solution at room temperature than the radical detected in I. This unique property of II to initiate room-temperature radical polymerization of BMI makes it important as a prototype for the development of low-temperature, thermally curable thermosetting resin systems for high-temperature applications. C1 USAF, Res Lab, Mat & Mfg Directorate, Polymer Branch,AFRL,MLBP, Wright Patterson AFB, OH 45433 USA. Univ Dayton, Res Inst, Dayton, OH 45469 USA. RP Tan, LS (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Polymer Branch,AFRL,MLBP, Wright Patterson AFB, OH 45433 USA. EM Loon-Seng.Tan@wpafb.af.mil RI Baek, Jong-Beom/E-5883-2010; Tan, Loon-Seng/F-6985-2012 OI Baek, Jong-Beom/0000-0003-4785-2326; Tan, Loon-Seng/0000-0002-2134-9290 NR 56 TC 16 Z9 16 U1 1 U2 17 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD JUN 17 PY 2003 VL 36 IS 12 BP 4385 EP 4396 DI 10.1021/ma030039z PG 12 WC Polymer Science SC Polymer Science GA 690BF UT WOS:000183526900021 ER PT J AU Wilson, WW Vij, A Vij, V Bernhardt, E Christe, KO AF Wilson, WW Vij, A Vij, V Bernhardt, E Christe, KO TI Polynitrogen chemistry: Preparation and characterization of (N-5)(2)SnF6, N5SnF5, and N5B(CF3)(4) SO CHEMISTRY-A EUROPEAN JOURNAL LA English DT Article DE anions; nitrogen; NMR spectroscopy; polynitrogen; vibrational spectroscopy ID SALTS; NITROGEN; N-5(+); DICATIONS; STABILITY; N-4(+); IONS; HF AB Metathetical processes were used to convert N5SbF6 into N-5[B(CF3)(4)] and (N-5)(2)SnF6. The latter salt is especially noteworthy because it contains two N-5(+) ions per anion, thus demonstrating that salts with touching polynitrogen cations can be prepared. This constitutes an important milestone towards our ultimate goal of synthesizing a stable, ionic nitrogen allotrope. The stepwise decomposition of (N-5)(2)SnF6 yielded N5SnF5. Multinuclear NMR spectra show that in HF the SnF5- ion exists as a mixture of Sn2F10O2- and Sn4F204- ions. Attempts to isolate FN5 from the thermolysis of (N-5)(2)SnF6 were unsuccessful, yielding only the expected decomposition products, FN3, N-2, trans-N2F2, NF3, and N-2. C1 ERC Inc, Edwards AFB, CA 93524 USA. USAF, Res Lab, AFRL PRSP, Space & Missile Prop Div, Edwards AFB, CA 93524 USA. Univ So Calif, Loker Hydrocarbon Res Inst, Los Angeles, CA 90089 USA. Gerhard Mercator Univ Duisburg, FB Anorgan Chem 6, D-47048 Duisburg, Germany. RP Wilson, WW (reprint author), ERC Inc, 10 E Saturn Blvd,Bldg 8451, Edwards AFB, CA 93524 USA. RI Vij, Ashwani/A-2836-2012; Christe, Karl/O-4885-2014 OI Vij, Ashwani/0000-0003-1144-4080; Christe, Karl/0000-0003-0661-5519 NR 33 TC 35 Z9 36 U1 1 U2 8 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0947-6539 J9 CHEM-EUR J JI Chem.-Eur. J. PD JUN 16 PY 2003 VL 9 IS 12 BP 2840 EP 2844 DI 10.1002/chem.200304973 PG 5 WC Chemistry, Multidisciplinary SC Chemistry GA 693HW UT WOS:000183712300019 ER PT J AU Devine, RAB AF Devine, RAB TI Infrared and electrical properties of amorphous sputtered (LaxAl1-x)(2)O-3 films SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID GATE DIELECTRICS; LAALO3; OXIDES AB Amorphous (LaxAl1-x)(2)O-3 (0.61less than or equal toxless than or equal to0.73) films have been deposited by sputtering in a partially reactive atmosphere. The average dielectric constant of the as-deposited films was 13.4 and 12.5 following annealing at 700 degreesC for 60 min in N-2; both values were much lower than the single crystal values similar to24 and 28 for LaAlO3 and La2O3, respectively. Leakage current densities were similar to10(-8) A cm(-2) for an applied field of 1 MV cm(-1) for film thicknesses similar to75 nm. Fourier transform infrared spectroscopy reveals transverse optic mode peaks at 723 and 400 cm(-1) and corresponding longitudinal optic modes at 821 and 509 cm(-1). The density of the amorphous phase is estimated to be similar to0.9 times the crystalline density. (C) 2003 American Institute of Physics. C1 USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA. Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA. RP Devine, RAB (reprint author), USAF, Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave, Kirtland AFB, NM 87117 USA. NR 18 TC 33 Z9 34 U1 1 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JUN 15 PY 2003 VL 93 IS 12 BP 9938 EP 9942 DI 10.1063/1.1576299 PG 5 WC Physics, Applied SC Physics GA 685XD UT WOS:000183288900080 ER PT J AU Joshi, RP Viswanadha, S Jogai, B Shah, P del Rosario, RD AF Joshi, RP Viswanadha, S Jogai, B Shah, P del Rosario, RD TI Analysis of dislocation scattering on electron mobility in GaN high electron mobility transistors SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID FIELD-EFFECT TRANSISTORS; CHEMICAL-VAPOR-DEPOSITION; MOLECULAR-BEAM EPITAXY; LIGHT-EMITTING-DIODES; BAND-STRUCTURE; ALGAN/GAN HETEROSTRUCTURES; WURTZITE GAN; TRANSPORT; ROUGHNESS; INTERFACE AB A Monte Carlo study of two-dimensional electron gas mobility in wurtzite GaN high electron mobility transistors is presented to include scattering due to edge dislocations strains. For self-consistency, numerical solution of Schrodinger, Poisson, and charge balance equations are used for the eigenfunctions. Electron mobility predictions around 1.71x10(3) cm(2)/V s, are in close agreement with the reported data. At the highest dislocation density of 10(10) cm(-2), mobility reductions of 16.8% and 8.6% are predicted for 77 and 300 K, respectively. Electron mobility behavior as a function of the channel density at different temperatures is also discussed. (C) 2003 American Institute of Physics. C1 Old Dominion Univ, Dept Elect & Comp Engn, Norfolk, VA 23529 USA. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA. USA, Res Lab, Adelphi, MD 20783 USA. RP Old Dominion Univ, Dept Elect & Comp Engn, Norfolk, VA 23529 USA. EM rjoshi@odu.edu NR 55 TC 19 Z9 19 U1 2 U2 8 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 JUN 15 PY 2003 VL 93 IS 12 BP 10046 EP 10052 DI 10.1063/1.1577406 PG 7 WC Physics, Applied SC Physics GA 685XD UT WOS:000183288900098 ER PT J AU Zhao, XP Webb, DF AF Zhao, XP Webb, DF TI Source regions and storm effectiveness of frontside full halo coronal mass ejections SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE full halo; coronal mass ejections ID INTERPLANETARY MAGNETIC-FIELD; GEOMAGNETIC-ACTIVITY; SOLAR CORONA; CLOUDS; EARTH; SOHO; SOLAR-CYCLE-23; PROMINENCES; DEPENDENCE; LOCATIONS AB [1] Full halo coronal mass ejections (CMEs) erupting from the side of the Sun facing Earth, i.e., frontside full halo CMEs, are considered to be a likely cause of major, transient geomagnetic storms. However, this hypothesis has not been tested over a full solar cycle. We compare all frontside full halo CMEs observed during the first half of solar cycle 23, from 1996 to the end of 2000, with moderate or larger storms at Earth. We show that the association of frontside full halo CMEs with such storms tends to decrease from 1997 to 2000, though this decreasing trend is not monotonic. We examine the locations of the frontside full halo CMEs from 1996 to 2000 with respect to two kinds of coronal closed field regions: bipolar closed field regions between opposite-polarity open field regions and unipolar closed field regions between like-polarity open field regions. We find that even during solar maximum when the occurrence frequency of the two kinds of regions is nearly the same, the central positions of the frontside full halo CMEs are mostly located under the bipolar coronal streamer belt, suggesting that most full halo CMEs originate in the bipolar coronal helmet streamers that are sandwiched between coronal holes having opposite magnetic polarity. Because the inclination of the heliospheric current sheet increases toward solar maximum, the fraction of CMEs emitted into the ecliptic decreases, and the inclination of associated flux ropes increases. These effects help to explain the solar cycle effect on the storm effectiveness of frontside full halo CMEs. C1 Stanford Univ, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA. Boston Coll, Inst Sci Res, Chestnut Hill, MA 02167 USA. USAF, Res Lab, VSBXS, Bedford, MA 01731 USA. RP Zhao, XP (reprint author), Stanford Univ, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA. NR 43 TC 71 Z9 72 U1 0 U2 4 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD JUN 13 PY 2003 VL 108 IS A6 AR 1234 DI 10.1029/2002JA009606 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 691YE UT WOS:000183632900002 ER PT J AU Lucia, DJ Beran, PS AF Lucia, DJ Beran, PS TI Projection methods for reduced order models of compressible flows SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE proper orthogonal decomposition; reduced order modeling; Galerkin projection; compressible flow; Euler equations ID REDUCTION; SYSTEMS AB Two different projection methods, Galerkin projection and direct projection, are developed for reduced-order modeling applications. The projection methods are used to identify low-dimensional systems of ordinary differential equations to represent the dynamics of a compressible, two-dimensional, inviscid flow-field under oscillatory forcing. Proper orthogonal decomposition is used to identify a small number of fluid modes to serve as the basis functions for the projections. Performance is evaluated relative to a high-order numerical model in terms of accuracy, order reduction, and computational efficiency. The treatment of boundary conditions, and stability of the reduced-order model are addressed in detail. The methods developed in this paper are suitable for general application to the Euler equations. With the addition of dissipation parameters, both the Galerkin projection and direct projection methods are tractable, stable, and properly treat the boundary conditions. Published by Elsevier Science B.V. C1 USAF, Res Lab, AFRL, VASD, Wright Patterson AFB, OH 45433 USA. RP Lucia, DJ (reprint author), USAF, Res Lab, AFRL, VASD, 2210 8 St,Bldg 146, Wright Patterson AFB, OH 45433 USA. NR 37 TC 22 Z9 23 U1 0 U2 2 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD JUN 10 PY 2003 VL 188 IS 1 BP 252 EP 280 DI 10.1016/S0021-9991(03)00166-9 PG 29 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 695GL UT WOS:000183822700013 ER PT J AU Shih, HD Kinch, MA Aqariden, F Liao, PK Schaake, HF Nathan, V AF Shih, HD Kinch, MA Aqariden, F Liao, PK Schaake, HF Nathan, V TI Development of gold-doped Hg0.79Cd0.21Te for very-long-wavelength infrared detectors SO APPLIED PHYSICS LETTERS LA English DT Article ID MOLECULAR-BEAM EPITAXY AB Gold-doped Hg1-xCdxTe samples of x = 0.2067 (in the very-long-wavelength infrared spectral band, with cutoff wavelengths similar to13.2 mum at 77 K) were prepared by tellurium-melt liquid-phase epitaxy. The samples were doped with indium to similar to2 x 10(14) cm(-3) and gold to similar to7 x 10(15) cm(-3), and were characterized by secondary ion mass spectroscopy, Hall measurements, and minority carrier lifetime measurements. State-of-the-art minority carrier lifetime of similar to0.82 mus was obtained. (C) 2003 American Institute of Physics. C1 DRS Infrared Technol LP, Dallas, TX 75374 USA. USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA. RP Shih, HD (reprint author), DRS Infrared Technol LP, 13544 N Cent Expressway,POB 740188, Dallas, TX 75374 USA. NR 6 TC 8 Z9 10 U1 1 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUN 9 PY 2003 VL 82 IS 23 BP 4157 EP 4159 DI 10.1063/1.1581369 PG 3 WC Physics, Applied SC Physics GA 685FA UT WOS:000183249100050 ER PT J AU Luo, B Ren, F Fitch, RC Gillespie, JK Jenkins, T Sewell, J Via, D Crespo, A Baca, AG Briggs, RD Gotthold, D Birkhahn, R Peres, B Pearton, SJ AF Luo, B Ren, F Fitch, RC Gillespie, JK Jenkins, T Sewell, J Via, D Crespo, A Baca, AG Briggs, RD Gotthold, D Birkhahn, R Peres, B Pearton, SJ TI Improved morphology for ohmic contacts to AlGaN/GaN high electron mobility transistors using WSix- or W-based metallization SO APPLIED PHYSICS LETTERS LA English DT Article ID N-TYPE GAN; RESISTANCE; TI/AL; HETEROSTRUCTURES; MICROSTRUCTURE; IMPLANTATION; TEMPERATURE; RESISTIVITY AB A comparison was made of specific contact resistivity and morphology of Ti/Al/Pt/WSi/Ti/Au and Ti/Al/Pt/W/Ti/Au ohmic contacts to AlGaN/GaN heterostructures relative to the standard Ti/Al/Pt/ Au metallization. The W- and WSi-based contacts show comparable specific resistivities to that of the standard contact on similar layer structures, reaching minimum values of similar to10(-5) Omega cm(2) after annealing in the range 850 - 900 degreesC. However, the W- and WSi-based contacts exhibit much smoother surface morphologies, even after 950 degreesC annealing. For example, the root-mean-square roughness of the Ti/Al/Pt/ WSi/Ti/Au contact annealed at 950 degreesC was unchanged from the as-deposited values whereas the Ti/Al/Pt/ Au contact shows significant deterioration of the morphology under these conditions. The improved thermal stability of the W- and WSix-based contacts is important for maintaining edge acuity during high-temperature operation. (C) 2003 American Institute of Physics. C1 Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA. USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. EMCORE Corp, Somerset, NJ 08873 USA. Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA. RP Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA. EM spear@mse.ufl.edu RI Gotthold, David/D-1086-2011 OI Gotthold, David/0000-0002-3990-6614 NR 29 TC 31 Z9 32 U1 0 U2 7 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0003-6951 EI 1077-3118 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUN 2 PY 2003 VL 82 IS 22 BP 3910 EP 3912 DI 10.1063/1.1579845 PG 3 WC Physics, Applied SC Physics GA 683AH UT WOS:000183124200034 ER PT J AU Peters, M Kumpfert, J Ward, CH Leyens, C AF Peters, M Kumpfert, J Ward, CH Leyens, C TI Titanium alloys for aerospace applications SO ADVANCED ENGINEERING MATERIALS LA English DT Article ID ALUMINIDES AB There is probably no other material more closely related to aerospace than titanium and its alloys. With a density of 4.5g/cm(3), titanium,alloys are only about half as heavy as steel or Ni-based superalloys, yielding an excellent strength-to-weight ratio. Furthermore, they have exceptional corrosion resistance. The use of titanium alloys in the aerospace sector will be highlighted, including airframe, engine, helicopter, and space applications. C1 DLR, German Aerosp Ctr, D-51170 Cologne, Germany. Airbus Ind, F-31707 Blagnac, France. USAF, Res Lab, London NW1 5TH, England. RP Peters, M (reprint author), DLR, German Aerosp Ctr, D-51170 Cologne, Germany. OI Ward, Charles/0000-0002-5813-439X NR 23 TC 77 Z9 81 U1 4 U2 38 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1438-1656 J9 ADV ENG MATER JI Adv. Eng. Mater. PD JUN PY 2003 VL 5 IS 6 BP 419 EP 427 DI 10.1002/adem.200310095 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA 703JX UT WOS:000184277200010 ER PT J AU Hughes, JR Novy, P Hatsukami, DK Jensen, J Callas, PW AF Hughes, JR Novy, P Hatsukami, DK Jensen, J Callas, PW TI Efficacy of nicotine patch in smokers with a history of alcoholism SO ALCOHOLISM-CLINICAL AND EXPERIMENTAL RESEARCH LA English DT Article ID SMOKING CESSATION; DIAGNOSTIC INTERVIEW; CIGARETTE-SMOKING; DRUG PROBLEMS; DEPENDENCE; RECOVERY; QUESTIONNAIRE; DEPRESSION; DRINKING; VALIDITY AB Background: Smokers with a history of alcohol dependence may have more difficulty quitting, might relapse to alcohol use, and might especially benefit from nicotine replacement therapy for smoking cessation. Methods: One hundred fifteen smokers with a history of alcohol dependence (median of 5 years previously) were randomly assigned to either a 21-mg nicotine patch or placebo in a trial designed to be as, similar as possible to a prior study that examined smokers with no history of alcoholism. Both studies were of heavy smokers with similar levels of nicotine dependence; thus, any differences in trials would be due to a history of alcohol problems per se. Results: In the current trial, adjusted prolonged smoking abstinence in those with a history of alcohol dependence was higher in the active than the placebo group at end-of-treatment (28% vs. 11%; odds ratio, 3.2; p = 0.04) and at 6-month follow-up (24% vs. 6%; odds ratio, 4.9; p = 0.02). Among subjects not lost to follow-up, none reported drinking problems or increases in craving for alcohol. Smoking abstinence was not lower and the odds ratio for nicotine patch therapy was not greater in smokers with a history of alcohol dependence than in smokers with no such history. Conclusions: Heavy smokers with a history of alcoholism benefit from nicotine patch treatment. A history of alcohol problems after a period of stable sobriety does not appear to influence smoking outcomes or response to nicotine replacement. Although no smokers relapsed to alcohol use, a trial that follows up all subjects is needed to verify this. C1 Univ Vermont, Dept Psychiat, Burlington, VT 05401 USA. Univ Vermont, Dept Psychol, Burlington, VT 05401 USA. Univ Vermont, Dept Family Practice, Burlington, VT 05401 USA. Univ Vermont, Dept Med Biostat, Burlington, VT 05401 USA. USAF, Minot, ND USA. Univ Minnesota, Dept Psychiat, Minneapolis, MN 55455 USA. RP Hughes, JR (reprint author), Univ Vermont, Dept Psychiat, 38 Fletcher Pl, Burlington, VT 05401 USA. FU NIAAA NIH HHS [AA-09430]; NIDA NIH HHS [DA-00490] NR 49 TC 50 Z9 52 U1 0 U2 3 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0145-6008 J9 ALCOHOL CLIN EXP RES JI Alcoholism (NY) PD JUN PY 2003 VL 27 IS 6 BP 946 EP 954 DI 10.1097/01.ALC.000007142.86555.4D PG 9 WC Substance Abuse SC Substance Abuse GA 692JK UT WOS:000183657800008 PM 12824815 ER PT J AU More, DR Napoli, DC Hagan, LL AF More, DR Napoli, DC Hagan, LL TI Herbal supplements and skin testing: the lack of effect of commonly used herbal supplements on histamine skin prick testing SO ALLERGY LA English DT Article DE alternative medicine; cutaneous histamine response; herbal supplements; skin testing ID ALTERNATIVE MEDICINE; ALLERGIC RHINITIS; UNITED-STATES; ASTHMA; COMPLEMENTARY AB Background: The use of herbal supplements is common, yet little is known about their pharmacologic properties. The purpose of this study was to assess the effects of 23 commonly used herbal supplements on histamine skin prick testing (SPT). Methods: Fifteen healthy volunteers participated in a double-blind, placebo-controlled, single-dose, crossover study. Wheal and flare responses to SPT with histamine phosphate (1 mg/ml) were measured before and 4 h after administration of each of the 23 popular herbal supplements, fexofenadine (60 mg) and placebo. Wheal and flare areas were recorded with tracings performed 10 min after the prick test and measured with a PC-digitizer using stereometric software. Results: Fexofenadine significantly suppressed the wheal (P < 0.001) and flare (P = 0.02) areas compared with placebo. None of the herbal supplements caused significant suppression of the wheal and flare areas compared with placebo (P > 0.10). Conclusion: When taken in single-doses, the popular herbal supplements tested did not significantly affect the histamine skin response. Therefore, it seems unnecessary for clinicians to ask patients to discontinue these herbal supplements prior to allergy skin testing. C1 Wilford Hall USAF Med Ctr, Dept Allergy & Immunol, MMIA, Lackland AFB, TX 78236 USA. RP More, DR (reprint author), Wilford Hall USAF Med Ctr, Dept Allergy & Immunol, MMIA, 2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA. NR 18 TC 0 Z9 0 U1 3 U2 4 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0105-4538 J9 ALLERGY JI Allergy PD JUN PY 2003 VL 58 IS 6 BP 492 EP 494 DI 10.1034/j.1398-9995.2003.00140.x PG 3 WC Allergy; Immunology SC Allergy; Immunology GA 681TK UT WOS:000183051300006 PM 12757449 ER PT J AU Motsinger, CD Perron, GA Lacy, TJ AF Motsinger, CD Perron, GA Lacy, TJ TI Use of atypical antipsychotic drugs in patients with dementia SO AMERICAN FAMILY PHYSICIAN LA English DT Article ID PARKINSONS-DISEASE; INDUCED PSYCHOSIS; BEHAVIORAL SYMPTOMS; ELDERLY PATIENTS; RISPERIDONE; TRIAL; QUETIAPINE; CLOZAPINE; PLACEBO; PSYCHIATRY AB Increasingly, atypical antipsychotic drugs are prescribed for elderly patients with symptoms of psychosis and behavioral disturbances. These symptoms often occur in patients with Alzheimer's disease, other dementias, or Parkinson's disease. As the average age of Americans increases, the prevalence of Alzheimer's disease and Parkinson's disease will rise accordingly. Although nonpharmacologic treatments for behavioral disturbances should be tried first, medications often are needed to enable the patient to be adequately cared for. Current guidelines recommend using risperidone and olanzapine to treat psychosis in patients with Alzheimer's dementia. Quetiapine and clozapine are recommended for treatment of psychosis in patients with Parkinson's disease. Additional research is needed for a recently approved agent, ziprasidone. To minimize side effects, these medications should be started at low dosages that are increased incrementally. Drug interactions, especially, those involving the cytochrome P450 system, must be considered. Clozapine's potentially lethal side effects limit its use in the primary care setting. Informed use of atypical antipsychotic drugs allows family physicians to greatly improve quality of life in elderly patients with dementia and behavior disturbances. Copyright (C) 2003 American Academy of Family Physicians. C1 York Hosp, Dept Family Med, Hershey, PA USA. Penn State Univ, Milton S Hershey Med Ctr, Hershey, PA 17033 USA. USAF, MC, LTCOL, Andrews AFB, MD USA. RP Motsinger, CD (reprint author), 715 W View Terr, Alexandria, VA 22301 USA. NR 31 TC 21 Z9 23 U1 1 U2 2 PU AMER ACAD FAMILY PHYSICIANS PI KANSAS CITY PA 8880 WARD PARKWAY, KANSAS CITY, MO 64114-2797 USA SN 0002-838X J9 AM FAM PHYSICIAN JI Am. Fam. Physician PD JUN 1 PY 2003 VL 67 IS 11 BP 2335 EP 2340 PG 6 WC Primary Health Care; Medicine, General & Internal SC General & Internal Medicine GA 687HR UT WOS:000183371100006 PM 12800962 ER PT J AU Kindsvater, S Leclerc, K Ward, J AF Kindsvater, S Leclerc, K Ward, J TI Effects of coadministration of Aspirin or Clopidogrel on exercise testing in patients with heart failure receiving angiotensin-converting enzyme inhibitors SO AMERICAN JOURNAL OF CARDIOLOGY LA English DT Article ID LEFT-VENTRICULAR DYSFUNCTION; MYOCARDIAL-INFARCTION; ENALAPRIL; MORTALITY; SURVIVAL; TRIAL; PROSTAGLANDINS; CAPTOPRIL C1 Brooke Army Med Ctr, Serv Cardiol, Ft Sam Houston, TX USA. RP Kindsvater, S (reprint author), 81st MDOS SGOMC, 301 Fisher St, Keesler AFB, MS 39534 USA. NR 18 TC 15 Z9 15 U1 0 U2 0 PU EXCERPTA MEDICA INC PI NEW YORK PA 650 AVENUE OF THE AMERICAS, NEW YORK, NY 10011 USA SN 0002-9149 J9 AM J CARDIOL JI Am. J. Cardiol. PD JUN 1 PY 2003 VL 91 IS 11 BP 1350 EP 1352 DI 10.1016/S0002-9149(03)00328-X PG 3 WC Cardiac & Cardiovascular Systems SC Cardiovascular System & Cardiology GA 685EE UT WOS:000183247200014 PM 12767432 ER PT J AU Wilhelm, S Deckersbach, T Coffey, BJ Bohne, A Peterson, AL Baer, L AF Wilhelm, S Deckersbach, T Coffey, BJ Bohne, A Peterson, AL Baer, L TI Habit reversal versus supportive psychotherapy for Tourette's disorder: A randomized controlled trial SO AMERICAN JOURNAL OF PSYCHIATRY LA English DT Article; Proceedings Paper CT World Congress of Behavioral and Cognitive Therapy CY JUL 17-21, 2001 CL TORONTO, CANADA AB Objective: The authors investigated the efficacy of habit reversal for Tourette's disorder, which is characterized by multiple motor and vocal tics. Method: Thirty-two patients with Tourette's disorder were randomly assigned to 14 sessions of either habit reversal or supportive psychotherapy. Habit reversal consisted of awareness training, self-monitoring, relaxation training, competing response training, and contingency management. Changes in severity of Tourette's disorder and psychosocial impairment were investigated over the course of the 14-session treatment for the 29 patients who completed at least eight treatment sessions. Results: In contrast to the 13 patients in the supportive psychotherapy group, the 16 patients in the habit reversal group improved significantly. The habit reversal patients remained significantly improved over pretreatment at 10-month follow-up. Conclusions: Habit reversal may be an effective behavioral treatment for Tourette's disorder. C1 Harvard Univ, Sch Med, Massachusetts Gen Hosp, Boston, MA USA. Harvard Univ, McLean Hosp, Sch Med, Belmont, MA 02178 USA. Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. RP Wilhelm, S (reprint author), Massachusetts Gen Hosp E, OCD Clin, 149 13th St, Charlestown, MA 02129 USA. NR 7 TC 86 Z9 88 U1 2 U2 7 PU AMER PSYCHIATRIC PRESS, INC PI ARLINGTON PA 1000 WILSON BOULEVARD, STE 1825, ARLINGTON, VA 22209-3901 USA SN 0002-953X J9 AM J PSYCHIAT JI Am. J. Psychiat. PD JUN PY 2003 VL 160 IS 6 BP 1175 EP 1177 DI 10.1176/appi.ajp.160.6.1175 PG 3 WC Psychiatry SC Psychiatry GA 685BK UT WOS:000183240800024 PM 12777279 ER PT J AU Ly, JQ Sanders, TG Mulloy, JP Soares, GM Beall, DP Parsons, TW Slabaugh, MA AF Ly, JQ Sanders, TG Mulloy, JP Soares, GM Beall, DP Parsons, TW Slabaugh, MA TI Osseous change adjacent to soft-tissue hemangiomas of the extremities: Correlation with lesion size and proximity to bone SO AMERICAN JOURNAL OF ROENTGENOLOGY LA English DT Article ID SKELETAL-MUSCLE; DIAGNOSIS AB OBJECTIVE. The purpose of this study was to describe the findings of MR imaging and radiographic changes that occur in osseous structures adjacent to soft-tissue hemangiomas of the extremities and to correlate them with patient symptomatology, the size of the hemangiomas, and their proximity to adjacent bone. MATERIALS AND METHODS. We retrospectively reviewed the radiographs and MR images of 35 patients with soft-tissue hemangiomas of the extremities. The pattern and extent of the osseous change were categorized as periosteal, cortical, or medullary. Symptomatology, a size, and proximity of the hemangioma to the adjacent bone were compared with the presence or absence of osseous change. Statistical analysis was performed using the Student's t test. RESULTS. Osseous change was noted on radiographs in 13 (37%) of 35 patients and on MR images in 11 (31%) of 35 patients with a total of 14 patients (40%) showing osseous change on at least one study. Periosteal change was present in eight (23%) of 35 patients; cortical change, in 11 (31%) of 35 patients; and medullary change, in 10 (29%) of 35 patients. Direct contact between the soft-tissue hemangioma and the adjacent bone was seen in 13 of 14 patients with osseous change. In those patients without osseous change, the average distance between the soft-tissue hemangioma and bone was 1.06 cm (range, 0-4 cm). No correlation was found between symptoms and the presence of osseous change. CONCLUSION. Soft-tissue hemangiomas of the extremities frequently result in adjacent osseous change that can be categorized as either periosteal, cortical, or medullary. Only medullary changes correspond with hemangioma size, whereas all three categories of change correlate with the proximity of the hemangioma to the adjacent bone. The presence of osseous change does not correlate with patient symptomatology. C1 Wilford Hall USAF Med Ctr, Dept Radiol, Lackland AFB, TX 78236 USA. Wilford Hall USAF Med Ctr, Dept Orthoped Surg, Lackland AFB, TX 78236 USA. RP Ly, JQ (reprint author), Wilford Hall USAF Med Ctr, Dept Radiol, 759th MDTS MTRD,Ste 1 Bergquist Dr, Lackland AFB, TX 78236 USA. NR 23 TC 16 Z9 18 U1 0 U2 2 PU AMER ROENTGEN RAY SOC PI RESTON PA 1891 PRESTON WHITE DR, SUBSCRIPTION FULFILLMENT, RESTON, VA 22091 USA SN 0361-803X J9 AM J ROENTGENOL JI Am. J. Roentgenol. PD JUN PY 2003 VL 180 IS 6 BP 1695 EP 1700 PG 6 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 683LE UT WOS:000183149200034 PM 12760946 ER PT J AU Haverluk, TW AF Haverluk, TW TI Tejano South Texas: A Mexican-American cultural province. SO ANNALS OF THE ASSOCIATION OF AMERICAN GEOGRAPHERS LA English DT Book Review DE homeland; regional geography; South Texas C1 USAF Acad, Dept Geog, Colorado Springs, CO 80840 USA. RP Haverluk, TW (reprint author), USAF Acad, Dept Geog, Colorado Springs, CO 80840 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU BLACKWELL PUBLISHERS PI MALDEN PA 350 MAIN STREET, STE 6, MALDEN, MA 02148 USA SN 0004-5608 J9 ANN ASSOC AM GEOGR JI Ann. Assoc. Am. Geogr. PD JUN PY 2003 VL 93 IS 2 BP 525 EP 526 DI 10.1111/1467-8306.930201413 PG 2 WC Geography SC Geography GA 701AM UT WOS:000184143400027 ER PT J AU Omont, A Gilmore, GF Alard, C Aracil, B August, T Baliyan, K Beaulieu, S Begon, S Bertou, X Blommaert, JADL Borsenberger, J Burgdorf, M Caillaud, B Cesarsky, C Chitre, A Copet, E de Batz, B Egan, MP Egret, D Epchtein, N Felli, M Fouque, P Ganesh, S Genzel, R Glass, IS Gredel, R Groenewegen, MAT Guglielmo, F Habing, HJ Hennebelle, P Jiang, B Joshi, UC Kimeswenger, S Messineo, M Miville-Deschenes, MA Moneti, A Morris, M Ojha, DK Ortiz, R Ott, S Parthasarathy, M Perault, M Price, SD Robin, AC Schultheis, M Schuller, F Simon, G Soive, A Testi, L Teyssier, D Tiphene, D Unavane, M van Loon, JT Wyse, R AF Omont, A Gilmore, GF Alard, C Aracil, B August, T Baliyan, K Beaulieu, S Begon, S Bertou, X Blommaert, JADL Borsenberger, J Burgdorf, M Caillaud, B Cesarsky, C Chitre, A Copet, E de Batz, B Egan, MP Egret, D Epchtein, N Felli, M Fouque, P Ganesh, S Genzel, R Glass, IS Gredel, R Groenewegen, MAT Guglielmo, F Habing, HJ Hennebelle, P Jiang, B Joshi, UC Kimeswenger, S Messineo, M Miville-Deschenes, MA Moneti, A Morris, M Ojha, DK Ortiz, R Ott, S Parthasarathy, M Perault, M Price, SD Robin, AC Schultheis, M Schuller, F Simon, G Soive, A Testi, L Teyssier, D Tiphene, D Unavane, M van Loon, JT Wyse, R TI ISOGAL: A deep survey of the obscured inner Milky Way with ISO at 7 mu m and 15 mu m and with DENIS in the near-infrared SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : AGB and post-AGB; stars : circumstellar matter; stars : mass-loss; stars : formation; dust : extinction; infrared : stars; Galaxy : bulge ID ASYMPTOTIC GIANT BRANCH; YOUNG STELLAR OBJECTS; GALACTIC-CENTER; DARK CLOUDS; INTERSTELLAR EXTINCTION; BAADES WINDOWS; MASS-LOSS; CIRCUMSTELLAR ENVELOPES; MIRA VARIABLES; OH/IR STARS AB The ISOGAL project is an infrared survey of specific regions sampling the Galactic Plane selected to provide information on Galactic structure, stellar populations, stellar mass-loss and the recent star formation history of the inner disk and Bulge of the Galaxy. ISOGAL combines 7 and 15 mum ISOCAM observations - with a resolution of 6 0 0 at worst - with DENIS IJK(s) data to determine the nature of the sources and the interstellar extinction. We have observed about 16 square degrees with a sensitivity approaching 10-20 mJy, detecting similar to10(5) sources, mostly AGB stars, red giants and young stars. The main features of the ISOGAL survey and the observations are summarized in this paper, together with a brief discussion of data processing and quality. The primary ISOGAL products are described briefly ( a full description is given in Schuller et al. 2003): viz. the images and the ISOGAL - DENIS five-wavelength point source catalogue. The main scientific results already derived or in progress are summarized. These include astrometrically calibrated 7 and 15 mum images, determining structures of resolved sources; identification and properties of interstellar dark clouds; quantification of the infrared extinction law and source dereddening; analysis of red giant and ( especially) AGB stellar populations in the central Bulge, determining luminosity, presence of circumstellar dust and mass-loss rate, and source classification, supplemented in some cases by ISO/CVF spectroscopy; detection of young stellar objects of diverse types, especially in the inner Bulge with information about the present and recent star formation rate; identification of foreground sources with mid-IR excess. These results are the subject of about 25 refereed papers published or in preparation. C1 CNRS, Inst Astrophys Paris, F-75014 Paris, France. Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England. Observ Paris, GEPI, Paris, France. ESA, ISO Data Ctr, Villafranca Dasti, Italy. Phys Res Lab, Ahmadabad 380009, Gujarat, India. Ecole Normale Super, Lab Radioastron Millimetrique, F-75231 Paris, France. Observ Paris, F-75014 Paris, France. Leiden Observ, NL-2300 RA Leiden, Netherlands. Osserv Astrofis Arcetri, I-50125 Florence, Italy. TIFR, Bombay, Maharashtra, India. Keele Univ, Sch Chem & Phys, Astrophys Grp, Keele, Staffs, England. USAF, Res Lab, Hanscom AFB, MA USA. ESO, Garching, Germany. OCA, Nice, France. S African Astron Observ, ZA-7935 Cape Town, South Africa. Observ Besancon, Besancon, France. RU Leuven, Inst Sterrekunde, Louvain, Belgium. Observ Paris, LESIA, Paris, France. ESO, Santiago, Chile. Univ Innsbruck, Inst Astrophys Leopold Franzens, A-6020 Innsbruck, Austria. Univ Calif Los Angeles, Los Angeles, CA USA. Johns Hopkins Univ, Baltimore, MD USA. Beijing Normal Univ, Dept Astron, Beijing, Peoples R China. UFES, Vitoria, Spain. Observ Paris, CNRS, UMS 2201, Paris, France. MPIE, Garching, Germany. Indian Inst Sci, Bangalore, Karnataka, India. ESA, ESTEC, Noordwijk, Netherlands. Indian Inst Astrophys, Bangalore 560034, Karnataka, India. CALTECH, SIRTIF, Ctr Sci, Pasadena, CA 91125 USA. Observ Strasbourg, Strasbourg, France. Max Planck Inst Astron, Heidelberg, Germany. Univ Victoria, Victoria, BC V8W 2Y2, Canada. RP Omont, A (reprint author), CNRS, Inst Astrophys Paris, 98 Bis Bd Arago, F-75014 Paris, France. EM omont@iap.fr RI Ortiz, Roberto/I-4015-2012; Kimeswenger, of/K-7393-2013; Egret, Daniel/C-1053-2014; OI Ortiz, Roberto/0000-0002-0084-8373; Egret, Daniel/0000-0003-1605-7047; Ganesh, Shashikiran/0000-0002-7721-3827 NR 85 TC 57 Z9 58 U1 0 U2 7 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 2003 VL 403 IS 3 BP 975 EP 992 DI 10.1051/0004-6361:20030437 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 682FE UT WOS:000183080400021 ER PT J AU Fernandes, L Linder, J Krock, LP Balldin, UI Harms-Ringdahl, K AF Fernandes, L Linder, J Krock, LP Balldin, UI Harms-Ringdahl, K TI Muscle activity in pilots with and without pressure breathing during acceleration SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article DE acceleration; electromyography; muscle contraction; positive-pressure respiration; Valsalva maneuver ID SYMPATHETIC-NERVE ACTIVITY; G STRAINING MANEUVER; FATIGUE; PROTECTION; HUMANS AB Background: Fighter pilots are frequently exposed to high acceleration + Gz) forces during sorties. To counter these forces the pilots wear anti-G ensembles. use positive pressure breathing for G protection (PBG), and perform anti-G straining maneuvers (AGSMs). The purpose of this study was to analyze the muscle activity during sustained high G when no positive pressure breathing was used (control) compared with that during the use of PBG. Methods: Seven Swedish Air Force fighter pilots volunteered to be exposed to gradual and rapid onset runs to +9 Gz. with and without PBG in a human centrifuge. Surface electromyography was recorded from the intercostals, rectus abdominis, vastus lateralis, biceps femoris, and gastrocnemius lateralis. Measured variables included mean muscle activity, relative time with high muscle activity levels, and individual activatton preferences. Results. G duration tolerance was significantly longer (p = 0.028) when PBG was used (57 s) compared with control (32 s) during rapid onset runs. The vastus lateralis and the gastrocnemius lateralis generated activity > 50% of a reference contraction for a longer relative time during control (5.8% and 33.6%, respectively than during PBG (0.3% and 12.7%., respectively). Cumulative muscle activity during acceleration was compared between trials and indicated that some pilots preferred contracting their leg muscles and others their abdominal muscles. Conclusion: G duration tolerance time increased when PBG was used during rapid onset sustained exposures. Less relative time with high muscle activity was seen during the use of PBG in two groups of leg muscles. The pilots seemed to have individual muscle activation sequence preferences while performing the AGSMs. C1 Karolinska Inst, Neurotec Dept, Div Phys Therapy, Stockholm, Sweden. Swedish Armed Forces, Aeromed Ctr, Stockholm, Sweden. USAF, Sch Aerosp Med, Brooks City Base, TX USA. USAF, Res Lab, Brooks AFB, TX USA. Karolinska & Huddinge Univ Hosp, Stockholm, Sweden. RP Harms-Ringdahl, K (reprint author), Karolinska Hosp & Inst, Dept Rehabil Med, S1 01, SE-17176 Stockholm, Sweden. NR 19 TC 3 Z9 5 U1 0 U2 1 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD JUN PY 2003 VL 74 IS 6 BP 626 EP 632 PG 7 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA 685HU UT WOS:000183257400005 PM 12793533 ER PT J AU Gibbons, JA Ramsey, CS Wright, JK Pilmanis, AA AF Gibbons, JA Ramsey, CS Wright, JK Pilmanis, AA TI Case history of serious altitude decompression sickness following rapid rate of ascent SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article DE flight medicine; hyperbaric oxygen treatment; altitude; VGE; emboli; CNS; decompression sickness; DCS; denitrogenation; preoxygenation; prebreathe; respiratory ID GAS EMBOLI; SYMPTOMS AB Neurologic and respiratory decompression sickness (DCS) symptoms occurring in the same individual represent complications rarely observed in altitude research. A case is presented of multi-symptom serious DCS resulting from exposure to 12,192 m (40,000 ft). Following 90 min of preoxygenation, the patient was decompressed in a hypobaric chamber from ground level to 12,192 m in 30 s. After 69 min at altitude he developed substernal chest pressure and the flight was immediately terminated. During the chamber descent the patient appeared disoriented. By 5486 m (18,000 ft) his chest pressure had resolved. The post-flight medical exam revealed multiple neurological abnormalities. He underwent a Table VI hyperbaric oxygen treatment with complete resolution of all abnormal neurological findings. C1 USAF, Res Lab, High Altitude Protect Res, HEPR, Brooks AFB, TX 78235 USA. USAF, Sch Aerosp Med, Brooks AFB, TX 78235 USA. RP Gibbons, JA (reprint author), USAF, Res Lab, Biodynam & Protect Div, HEP, 2504 Gillingham Dr,Room 25, Brooks AFB, TX 78235 USA. NR 10 TC 3 Z9 3 U1 0 U2 0 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD JUN PY 2003 VL 74 IS 6 BP 675 EP 678 PG 4 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA 685HU UT WOS:000183257400014 PM 12793542 ER PT J AU Schwertner, HA Olsen, EV Kong, SB AF Schwertner, HA Olsen, EV Kong, SB TI Determination of modafinil (Provigil) in plasma and urine by highperformance liquid-chromatography. SO CLINICAL CHEMISTRY LA English DT Meeting Abstract CT 55th Annual Meeting of the American-Association-for-Clinical-Chemiatry CY JUL 20-24, 2003 CL PHILADELPHIA, PENNSYLVANIA C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. Univ Incarnate Word, San Antonio, TX USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ASSOC CLINICAL CHEMISTRY PI WASHINGTON PA 2101 L STREET NW, SUITE 202, WASHINGTON, DC 20037-1526 USA SN 0009-9147 J9 CLIN CHEM JI Clin. Chem. PD JUN PY 2003 VL 49 IS 6 SU S BP A123 EP A123 PN 2 PG 1 WC Medical Laboratory Technology SC Medical Laboratory Technology GA 682JP UT WOS:000183088700394 ER PT J AU Chaney, JC Derdak, S AF Chaney, JC Derdak, S TI ODM/CardioQ esophageal Doppler technology - Reply SO CRITICAL CARE MEDICINE LA English DT Letter ID INTRAVASCULAR VOLUME OPTIMIZATION; RANDOMIZED CONTROLLED TRIAL; PROXIMAL FEMORAL FRACTURE; HOSPITAL STAY; LENGTH; REPAIR C1 Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. RP Chaney, JC (reprint author), Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0090-3493 J9 CRIT CARE MED JI Crit. Care Med. PD JUN PY 2003 VL 31 IS 6 BP 1889 EP 1889 DI 10.1097/01.CCM.0000069825.62650.5B PG 1 WC Critical Care Medicine SC General & Internal Medicine GA 691DC UT WOS:000183588700059 ER PT J AU Martinez, SA Sathish, S Blodgett, MP Shepard, MJ AF Martinez, SA Sathish, S Blodgett, MP Shepard, MJ TI Residual stress distribution on surface-treated Ti-6Al-4V by x-ray diffraction SO EXPERIMENTAL MECHANICS LA English DT Article DE x-ray diffraction; residual stress; shot peening; laser shock peening; low plasticity burnishing AB The x-ray diffraction technique has been used to measure surface residual stress in Ti-6Al-4V samples subjected to shot peening (SP), laser shock peening (LSP) and low plasticity burnishing (LPB). The magnitude, spatial and directional dependence and uniformity of the surface residual stresses have been investigated. The results show that residual stresses due to SP are uniform and independent of direction. LSP has been observed to produce non-uniform residual stress varying from one region to another, and also within a single laser shock. In the case of LPB, residual stresses have uniform spatial distribution but have been observed to be direction-dependent. Various components of the residual stress tensor in the LPB sample have been determined following the Dolle-Hauk method. The results of the residual stress due to three surface treatments are compared, and possible reasons for spatial and directional dependence are discussed. C1 USAF, Res Lab, Dayton, OH USA. Univ Dayton, Res Inst, Dayton, OH USA. RP Martinez, SA (reprint author), USAF, Res Lab, Dayton, OH USA. NR 25 TC 16 Z9 19 U1 2 U2 8 PU SAGE PUBLICATIONS LTD PI LONDON PA 6 BONHILL STREET, LONDON EC2A 4PU, ENGLAND SN 0014-4851 J9 EXP MECH JI Exp. Mech. PD JUN PY 2003 VL 43 IS 2 BP 141 EP 147 DI 10.1177/0014485103043002004 PG 7 WC Materials Science, Multidisciplinary; Mechanics; Materials Science, Characterization & Testing SC Materials Science; Mechanics GA 681HD UT WOS:000183030000004 ER PT J AU Caputo, DF AF Caputo, DF TI Overview of the multi-agency radiation survey and assessment of subsurface soils (MARSASS) manual SO HEALTH PHYSICS LA English DT Meeting Abstract C1 USAF, Brooks AFB, TX 78235 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S262 EP S262 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000322 ER PT J AU Welsh, BM Muller, WD Kent, BM AF Welsh, BM Muller, WD Kent, BM TI Air Force Research Laboratory advanced compact range RCS uncertainty analysis for a general target SO IEEE ANTENNAS AND PROPAGATION MAGAZINE LA English DT Article DE compact range; measurement errors; radar cross section; radar data processing; radar measurements; radar scattering; radar testing; range evaluation; ISO standards; measurement standards AB A calibration uncertainty analysis was conducted for the Air Force Research Laboratory's (AFRL's) Advanced Compact Range (ACR) in 2000 [1]. This analysis was a key component of the Radar Cross Section (RCS) ISO-25 (ANSI-Z-540) Range Certification Demonstration Project. The scope of the RCS uncertainty analysis for the demonstration project was limited to calibration targets. Since that time, we have initiated a detailed RCS uncertainty analysis for a more-typical target measured in the ACR. A "more typical" target is one that is much larger with respect to a wavelength than the calibration targets, and that is characterized by a wide dynamic range of RCS scattering levels. We chose a 10-foot ogive as the target, due to the fact it was a large target, exhibited a wide dynamic range of scattering, and the scattering levels could be predicted using readily available CEM codes. We present the methodology for the uncertainty analysis and detailed analyses of selected component uncertainties. The aspects of the uncertainty analysis that are unique to the "typical target" (i.e., a non-calibration target) are emphasized. C1 Mission Res Corp, Dayton, OH 45430 USA. USAF, Res Lab, SNS, Wright Patterson AFB, OH 45433 USA. RP Mission Res Corp, 3975 Res Blvd, Dayton, OH 45430 USA. NR 4 TC 4 Z9 4 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1045-9243 EI 1558-4143 J9 IEEE ANTENN PROPAG M JI IEEE Antennas Propag. Mag. PD JUN PY 2003 VL 45 IS 3 BP 195 EP 200 DI 10.1109/MAP.2003.1232185 PG 6 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA 723FX UT WOS:000185422800019 ER PT J AU Fagin, B AF Fagin, B TI Ada/Mindstorms 3.0 SO IEEE ROBOTICS & AUTOMATION MAGAZINE LA English DT Article DE robotics; education; Ada; LEGO AB A Computational Environment Built on the LEGO Mindstorms RCX Kit for Introductory Robotics and Programming. RP Fagin, B (reprint author), USAF Acad, Dept Comp Sci, Colorado Springs, CO 80840 USA. EM barry.fagin@usafa.af.mil NR 8 TC 6 Z9 6 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1070-9932 J9 IEEE ROBOT AUTOM MAG JI IEEE Robot. Autom. Mag. PD JUN PY 2003 VL 10 IS 2 BP 19 EP 24 DI 10.1109/MRA.2003.1213612 PG 6 WC Automation & Control Systems; Robotics SC Automation & Control Systems; Robotics GA 693XB UT WOS:000183742700005 ER PT J AU Okuyucu, H Arda, L Heiba, ZK El-Kawni, MI Tolliver, JC Barnes, PN Aslanoglu, Z Akin, Y Hascicek, YS AF Okuyucu, H Arda, L Heiba, ZK El-Kawni, MI Tolliver, JC Barnes, PN Aslanoglu, Z Akin, Y Hascicek, YS TI Y- and Yb-123 coated conductor development by PLD and sol-gel on (Gd1-xErx)(2)O-3 buffered Ni tapes SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE coating; lattice mismatch; sol-gel; superconductivity; Yb-123 ID FILMS AB YBa2Cu3O7-delta and YbBa2Cu3O7-delta layers were coated by sol-gel and PLD on Gd1.91Er0.09O3 (100% lattice match with Y- and Yb-123) textured buffer layer on Ni substrates: Different thickness of buffer layers and superconducting layer were tried to see the thickness effect on superconducting properties. Buffer layers were prepared with different lattice parameters for Y-123 and Yb-123. Coated conductors were characterized by means of XRD, ESEM, and T-c and J(c) measurement. Since the perfect lattice match can be achieved between buffer layer and superconducting layer, texture of superconducting film was improved, and consequently critical current density of Y- and Yb-123 were improved. C1 Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. USAF, Res Lab, PRPG, Wright Patterson AFB, OH 45433 USA. Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA. RP Okuyucu, H (reprint author), Gazi Univ, Tech Educ Fac, TR-06500 Ankara, Turkey. NR 8 TC 12 Z9 13 U1 2 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2677 EP 2679 DI 10.1109/TASC.2003.811949 PN 3 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400060 ER PT J AU Sumption, MD Coleman, EL Cobb, CB Barnes, PN Haugan, TJ Tolliver, J Oberly, CE Collings, EW AF Sumption, MD Coleman, EL Cobb, CB Barnes, PN Haugan, TJ Tolliver, J Oberly, CE Collings, EW TI Hysteretic loss vs. filament width in thin YBCO films near the penetration field SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE AC loss; hysteretic loss; penetration field; YBCO ID CONDUCTORS; TAPES AB Magnetization vs. applied field measurements (M-H loops) were taken on YBCO thin films with filaments I patterned into them. The YBCO was deposited onto LaAlO3 substrates using PLD, and the filaments were formed by laser ablation. M-H loops were taken at 4.2 K in fields up to 9 T using a vibrating sample magnetometer technique, the field applied perpendicular to the film width, d. The losses were seen to be greatly reduced by filament width reductions following the standard expression Q(h)/H-m proportional to dJc/10. The penetration field was also well described by them standard "high field" expression H-p = (0.4J(c)t) ln(d/t + 1), where t is the film thickness. The regimes of applicability of the loss expression were investigated, in particular near H-m approximate to H-p. A more general form of the loss equation was obtained and compared with the high-field approximation. The result was that although Q(h)/H-m still increased in proportion to d, the rate of increase decreased as H-m approached H-p. C1 Ohio State Univ, LASM, MSE, Columbus, OH 43210 USA. USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA. RP Sumption, MD (reprint author), Ohio State Univ, LASM, MSE, Columbus, OH 43210 USA. RI Sumption, Mike/N-5913-2016 OI Sumption, Mike/0000-0002-4243-8380 NR 13 TC 13 Z9 13 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3553 EP 3556 DI 10.1109/TASC.2003.81296 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400285 ER PT J AU Majoros, A Tomov, RI Glowacki, BA Campbell, AM Oberly, CE AF Majoros, A Tomov, RI Glowacki, BA Campbell, AM Oberly, CE TI Hysteresis losses in YBCO coated conductors on textured metallic substrates SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang ID CRITICAL-CURRENT DENSITY; TRANSPORT AC LOSSES; SUPERCONDUCTORS; MAGNETIZATION; MULTIFILAMENTARY; TAPE AB Hysteresis losses of YBCO coated conductors on two different textured metallic substrates - (NiFe and NiCrW)- were measured. The measurements were performed in a dc SQUID magnetometer at 5 K in applied magnetic fields up to 6 T. An YBCO layer of the sample on NiCrW substrate was cut to form 2 filaments and measured again in a perpendicular magnetic field as well as in a field at an angle of 450 with respect to the tape face. In a perpendicular magnetic field the hysteresis losses of the 2 filaments were a factor of about 0.6 lower than the losses of the original single filament. The influence on the magnetization of dividing a monocore tape into 2 and 4 filaments was numerically modeled using the critical state model. For full penetration and a perpendicular magnetic field the magnetization decreases proportionally with increasing number of filaments. Hysteresis losses in metallic substrates were substantially lower than the total losses of the composite tapes. C1 Univ Cambridge, IRC Superconduct, Cambridge CB3 0HE, England. Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England. USAF, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA. RP Majoros, A (reprint author), Univ Cambridge, IRC Superconduct, Cambridge CB3 0HE, England. RI Glowacki, Bartek/F-5113-2010 NR 13 TC 13 Z9 14 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3626 EP 3629 DI 10.1109/TASC.2003.812414 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400303 ER PT J AU Barnes, PN Mukhopadhyay, SM Haugan, TJ Krishnaswami, S Tolliver, JC Maartense, I AF Barnes, PN Mukhopadhyay, SM Haugan, TJ Krishnaswami, S Tolliver, JC Maartense, I TI Correlation between the XPS peak shapes of Y1Bu2Cu3O7-x and film quality SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE high-temperature superconductors; X-ray photoelectron spectroscopy; YBCO ID THIN-FILMS; DEPOSITION AB X-ray photoelectron spectroscopy (XPS) depth profiling was used to investigate the compositional and chemical profile of a typical YBCO coated conductor architecture. Results of the process revealed that the Y(3d) photoelectronic peak shape in these films is very different from bulk YBCO. To investigate this, several samples of Y1Ba2Cu3O7-x thin films were intentionally created of varying quality. The films were deposited on LaAlO3 by pulsed laser deposition with J(c) values ranging from poorly conducting up to several MA/cm(2). Initial results indicated a potential correlation between the Y(3d) XPS peak shape (full-width-half-maximum) of the YBCO and the film quality. A potential correlation may also exist with the Cu(2p)/Ba(3d) ratio indicating an interrelationship to the FWHM of the Y(3d) peak.. Film quality. was determined by current transport, resistive T-c, and AC magnetic susceptibility measurements. C1 USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. Wright State Univ, Dayton, OH 45432 USA. RP Barnes, PN (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. NR 19 TC 3 Z9 3 U1 1 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3643 EP 3646 DI 10.1109/TASC.2003.812419 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400307 ER PT J AU Psaromiligkos, IN Batalama, SN Medley, MJ AF Psaromiligkos, IN Batalama, SN Medley, MJ TI Rapid combined synchronization/demodulation structures for DS-CDMA systems - Part I: Algorithmic developments SO IEEE TRANSACTIONS ON COMMUNICATIONS LA English DT Article; Proceedings Paper CT IEEE International Conference on Communications CY JUN 18-22, 2000 CL NEW ORLEANS, LOUISIANA SP IEEE DE adaptive filters; code-division multiple access (CDMA); interference suppression; spread spectrum communication; synchronization ID MULTIPLE-ACCESS CHANNELS; MMSE INTERFERENCE SUPPRESSION; SPREAD-SPECTRUM COMMUNICATION; MULTIUSER DETECTION; OPTIMUM DETECTION; CODE ACQUISITION; DELAY ESTIMATION; DETECTORS; DEMODULATION; RECEIVER AB Blind adaptive linear, receivers are considered for the of direct-sequence code-division multiple-access signals in asynchronous transmissions. The proposed structures are self-synchronized in the sense that adaptive synchronization and demodulation are viewed and treated as an integrated receiver operation. Two computationally efficient combined synchronization/demodulation schemes are proposed, developed, and analyzed. The first scheme is based on the principles of minimum-variance distortionless-response processing, while the second scheme follows the principles of auxiliary-vector filtering and exhibits enhanced performance in short data-record scenarios. In both cases, the resulting receiver is a linear structure of order exactly equal to the system processing gain. Simulation studies included in this paper demonstrate the coarse synchronization as well as the bit-error rate performance of the proposed strategies. A sequel article (Part II of this paper) deals with theoretical finite data-record receiver performance analysis. C1 SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA. USAF, Res Lab, IFGC, Rome, NY 13441 USA. RP Psaromiligkos, IN (reprint author), McGill Univ, Dept Elect & Comp Engn, Montreal, PQ H3H 2N4, Canada. NR 47 TC 16 Z9 16 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0090-6778 J9 IEEE T COMMUN JI IEEE Trans. Commun. PD JUN PY 2003 VL 51 IS 6 BP 983 EP 994 DI 10.1109/TCOMM.2003.813256 PG 12 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA 697NC UT WOS:000183948500021 ER PT J AU Chen, PY Wicks, MC AF Chen, PY Wicks, MC TI Development of a lower confidence limit for the number of signals SO IEEE TRANSACTIONS ON SIGNAL PROCESSING LA English DT Article DE eigenvalues; noise; ranking and selection; signals ID PRINCIPAL COMPONENT ANALYSIS; LATENT ROOTS; MATRIX AB We propose a multistep procedure for constructing a lower confidence limit for computing the number of signals present in a vector measurement. We derive the probability of correct estimation P(CE) and the least favorable configuration (LFC) for our procedure. Under the LFC, P(CE) attains its minimum over the parameter space of all eigenvalues. Therefore, to implement our technique, procedure parameters are determined for the LFC for each sample size n so that the probability requirement is reached. C1 Syracuse Univ, Dept Math, Syracuse, NY 13244 USA. USAF, Res Lab, Sensors Dirctorate, Rome, NY 13441 USA. RP Wicks, MC (reprint author), Syracuse Univ, Dept Math, Syracuse, NY 13244 USA. EM wicksm@rl.af.mil NR 18 TC 8 Z9 8 U1 1 U2 2 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 JUN PY 2003 VL 51 IS 6 BP 1449 EP 1456 DI 10.1109/TSP.2003.811235 PG 8 WC Engineering, Electrical & Electronic SC Engineering GA 680EQ UT WOS:000182963700001 ER PT J AU Bolt, PJ AF Bolt, PJ TI The Chinese overseas: From earthbound China to the quest for autonomy. SO INTERNATIONAL HISTORY REVIEW LA English DT Book Review C1 USAF Acad, Colorado Springs, CO 80840 USA. RP Bolt, PJ (reprint author), USAF Acad, Colorado Springs, CO 80840 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU SIMON FRASER UNIV, INT HISTORY REVIEW PI BURNABY PA EAA 2015, BURNABY, BC V5A 1S6, CANADA SN 0707-5332 J9 INT HIST REV JI Int. Hist. Rev. PD JUN PY 2003 VL 25 IS 2 BP 385 EP 386 PG 2 WC History SC History GA 692RL UT WOS:000183674000009 ER PT J AU Neiberg, M AF Neiberg, M TI Serving two masters: The development of American military chaplaincy, 1860-1920. SO JOURNAL OF AMERICAN HISTORY LA English DT Book Review C1 USAF Acad, Colorado Springs, CO 80840 USA. RP Neiberg, M (reprint author), USAF Acad, Colorado Springs, CO 80840 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ORGANIZATION AMER HISTORIANS PI BLOOMINGTON PA 112 N BRYAN ST, BLOOMINGTON, IN 47408 USA SN 0021-8723 J9 J AM HIST JI J. Am. Hist. PD JUN PY 2003 VL 90 IS 1 BP 238 EP 239 PG 2 WC History SC History GA 691CP UT WOS:000183587500049 ER PT J AU Schaefer, D Brown, JM Anderson, DP Zhao, J Chokalingam, K Tomlin, D Ilavsky, J AF Schaefer, D Brown, JM Anderson, DP Zhao, J Chokalingam, K Tomlin, D Ilavsky, J TI Structure and dispersion of carbon nanotubes SO JOURNAL OF APPLIED CRYSTALLOGRAPHY LA English DT Article; Proceedings Paper CT 12th International Conference on Small-Angle Scattering CY AUG 25-29, 2002 CL VENICE, ITALY DE carbon nanotubes; polyelectrolytes; dispersion; small-angle scattering; reinforcing fillers ID MECHANICAL-PROPERTIES; PURIFICATION; SEPARATION; ROPES AB Small-angle light scattering and ultra small-angle X-ray scattering are used to assess the morphology of single-walled ( SWNTs) and multi-walled carbon nanotubes (MWNTs). For MWNTs, a power-law scattered-intensity profile with a slope of - 1.08 is consistent with the rod-like morphology. For SWNTs, however, scattering profiles characteristic of rod-like morphology are not observed on any length-scale from 1 nm to 50 mum. Rather, disordered objects are found that we identify as a network of carbon "ropes" enmeshed with polyelectrolyte dispersants. The effectiveness of polyelectrolyte dispersants is assessed using small-angle light scattering in conjunction with exposure to ultrasound. In the presence of an anionic polyelectrolyte, sonication can assist dispersion of both SWNTs and MWNTs. In the presence of a cationic agent, however, sonication can induce aggregation. SWNTs respond differently to ultrasound depending on whether residual synthesis catalyst is present. Four dispersants are studied, of which sodium polystyrene sulfonate is the most effective and polyallylamine hydrochloride is the least effective. C1 Univ Cincinnati, Dept Chem & Mat Engn, Cincinnati, OH 45221 USA. USAF, Res Lab, MLBCO, Wright Patterson AFB, OH 45433 USA. Univ Dayton, Res Inst, Dayton, OH 45469 USA. Tech Management Concepts Inc, AFRL, MLPJE, Wright Patterson AFB, OH 45433 USA. Purdue Univ, W Lafayette, IN 47907 USA. RP Schaefer, D (reprint author), Univ Cincinnati, Dept Chem & Mat Engn, Cincinnati, OH 45221 USA. RI Ilavsky, Jan/D-4521-2013; USAXS, APS/D-4198-2013 OI Ilavsky, Jan/0000-0003-1982-8900; NR 23 TC 58 Z9 59 U1 0 U2 5 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0021-8898 J9 J APPL CRYSTALLOGR JI J. Appl. Crystallogr. PD JUN PY 2003 VL 36 SI 1 BP 553 EP 557 DI 10.1107/S0021889803005028 PN 3 PG 5 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 668HN UT WOS:000182284400036 ER PT J AU Yang, DF Xue, LJ Devine, RAB AF Yang, DF Xue, LJ Devine, RAB TI Charge trapping in and electrical properties of pulsed laser deposited Sm2O3 films SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID GATE DIELECTRICS; THIN-FILMS; OXIDES; SI; SILICON; GD2O3; Y2O3 AB The electrical properties of pulsed laser deposited SM2O3 films. have been studied. The dielectric constants are 9.6 and 12.8 for samples deposited at 400 and 683 degreesC, respectively. The presence of substantial densities of mobile positive charge and significant negative, charge trapping has been evidenced. The leakage current densities are, typically, 10(-4) A cm(-2) for electric fields similar to0.24 MV cm(-1). (C) 2003 American institute of Physics. C1 USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA. Ctr High Technol Mat, Albuquerque, NM 87106 USA. Natl Res Council Canada, Integrated Mfg Technol Inst, London, ON N6G 4X8, Canada. RP Devine, RAB (reprint author), USAF, Res Lab, Space Vehicles Directorate, 3550 Averdeen Ave, Kirtland AFB, NM 87117 USA. NR 15 TC 10 Z9 10 U1 1 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JUN 1 PY 2003 VL 93 IS 11 BP 9389 EP 9391 DI 10.1063/1.1569660 PG 3 WC Physics, Applied SC Physics GA 683JE UT WOS:000183144300086 ER PT J AU Beekman, CS Christensen, AF AF Beekman, CS Christensen, AF TI Controlling for doubt and uncertainty through multiple lines of evidence: A new look at the Mesoamerican Nahua migrations SO JOURNAL OF ARCHAEOLOGICAL METHOD AND THEORY LA English DT Review DE anthropology; Mesoamerica; migration; Aztec; Nahua ID CENTRAL MEXICO; CENTRAL-EUROPE; MESO-AMERICA; UTO-AZTECAN; SETTLEMENT; PATTERNS; BASIN; COLONIZATION; TEOTIHUACAN; PREHISTORY AB Nahuatl represents a relatively recent extension of the Uto-Aztecan language family into Mesoamerica. Ethnohistorians have linked Nahuatl's arrival to the historically attested migrations of nomadic people into central Mexico in the last centuries before the Spanish Conquest. Archaeologists have tended to treat migration as an explanation for a change in material culture rather than a social question to be examined theoretically. We approach this migration through the comparison of multiple data sets and conclude that what has previously been treated as a historical event is instead part of a longer term process tying together Mesoamerica's northern periphery with its highland core. While we find that certain themes from migration theory are reflected in this preindustrial migration as well, other variables are unique and bode well for archaeology's ability to address and contribute to theoretical issues relating to migration. C1 Univ Colorado, Dept Anthropol, Denver, CO 80217 USA. USA, Cent Identificat Lab, Hickam AFB, HI USA. RP Beekman, CS (reprint author), Univ Colorado, Dept Anthropol, Campus Box 103,POB 173364, Denver, CO 80217 USA. EM cbeekman@carbon.cudenver.edu NR 213 TC 19 Z9 20 U1 1 U2 5 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1072-5369 J9 J ARCHAEOL METHOD TH JI J. Archaeol. Method Theory PD JUN PY 2003 VL 10 IS 2 BP 111 EP 164 DI 10.1023/A:1024519712257 PG 54 WC Anthropology; Archaeology SC Anthropology; Archaeology GA 706MR UT WOS:000184457900002 ER PT J AU Rodriguez, R Kim, K Ong, JL AF Rodriguez, R Kim, K Ong, JL TI In vitro osteoblast response to anodized titanium and anodized titanium followed by hydrothermal treatment SO JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A LA English DT Article DE titanium; hydroxyapatite; anodic oxide; osteocalcin; production; alkaline phosphatase activity ID CALCIUM-PHOSPHATE COATINGS; PLASMA-SPRAYED COATINGS; HYDROXYAPATITE COATINGS; OXIDE-FILMS; BONE; DEPOSITION; CA; HYDROXYLAPATITE; DISSOLUTION; SURFACES AB In this study, Titanium (Ti) surfaces were modified using anodization. The electrolyte used for anodization was a mixture of calcium glycerophosphate and calcium acetate. The anodized surfaces were divided into three groups. Hydrothermal treatments were performed on two of the anodized groups for either 2 or 4 h. In vitro osteoblast response to anodized oxide and the hydrothermal treated oxide after anodization was evaluated in this study. Calcium and phosphorus ions were deposited on the Ti oxide during anodization. Anodized surfaces following a 4-h hydrothermal treatment were observed to promote the growth apatite-like crystals as compared with anodized surfaces after a 2-h hydrothermal treatment. Cellular function and onset of mineralization, as indicated by protein production and osteocalcin production, respectively, also were observed as enhanced on hydrothermal-treated surfaces. It was thus concluded from this study that calcium phosphate and apatite-like crystals could be deposited on Ti surfaces using anodization and a combination of anodization and hydrothermal treatment. It was also concluded that the pheno-typic expression of osteoblast was enhanced by the presence of calcium phosphate or apatite-like crystals on anodized or hydrothermally treated Ti surfaces. (C) 2003 Wiley Periodicals, Inc. J Biomed Mater Res 65A: 352-358, 2003. C1 Wilford Hall USAF Med Ctr, Dept Prosthodont, Lackland AFB, TX 78236 USA. Univ Texas, Hlth Sci Ctr, Dept Restorat Dent, Div Biomat, San Antonio, TX 78229 USA. Kyungpook Natl Univ, Coll Dent, Dept Dent Biomat, Jung Gu, Taegu 700422, South Korea. Kyungpook Natl Univ, Inst Biomat Res & Dev, Jung Gu, Taegu 700422, South Korea. Univ Texas, Hlth Sci Ctr, Ctr Clin Bioengn, San Antonio, TX 78229 USA. RP Ong, JL (reprint author), Wilford Hall USAF Med Ctr, Dept Prosthodont, 2250 Pepperell St, Lackland AFB, TX 78236 USA. NR 41 TC 52 Z9 53 U1 0 U2 11 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0021-9304 J9 J BIOMED MATER RES A JI J. Biomed. Mater. Res. Part A PD JUN 1 PY 2003 VL 65A IS 3 BP 352 EP 358 DI 10.1002/jbm.a.10490 PG 7 WC Engineering, Biomedical; Materials Science, Biomaterials SC Engineering; Materials Science GA 685UA UT WOS:000183280600006 PM 12746882 ER PT J AU Barlow, CB Jordan, M Hendrix, WH AF Barlow, CB Jordan, M Hendrix, WH TI Character assessment: An examination of leadership levels SO JOURNAL OF BUSINESS AND PSYCHOLOGY LA English DT Article DE assessment; character assessment; leadership AB This paper discusses character assessment from a leadership level perspective. The organization studied is developing a leadership model for the next century. One of the leadership traits identified as essential was character. Approximately one thousand managers in the company were given two character assessment instruments via a Web-based medium. Significant differences were found between early-, mid-, and mature-level managers with an increasing trend in character traits across the levels. This research is consistent with Katz and Kahn's (1976) levels of leadership research. C1 USAF Acad, Colorado Springs, CO 80840 USA. NR 21 TC 8 Z9 8 U1 0 U2 2 PU KLUWER ACADEMIC-HUMAN SCIENCES PRESS PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA SN 0889-3268 J9 J BUS PSYCHOL JI J. Bus. Psychol. PD SUM PY 2003 VL 17 IS 4 BP 563 EP 584 DI 10.1023/A:1023408403204 PG 22 WC Business; Psychology, Applied SC Business & Economics; Psychology GA 687BD UT WOS:000183355200007 ER PT J AU Glassmire, DM Bierley, RA Wisniewski, AM Greene, RL Kennedy, JE Date, E AF Glassmire, DM Bierley, RA Wisniewski, AM Greene, RL Kennedy, JE Date, E TI Using the WMS-III faces subtest to detect malingered memory impairment SO JOURNAL OF CLINICAL AND EXPERIMENTAL NEUROPSYCHOLOGY LA English DT Article ID PROTOTYPICAL ANALYSIS; BELIEVABLE DEFICITS; EXPLANATORY MODELS; HEAD-INJURY; VALIDATION; PERFORMANCE; MMPI-2; TESTS; INDIVIDUALS; DYSFUNCTION AB The current study evaluated the utility of the WMS-III Faces I subtest (Faces) for the assessment of malingering. Thirty nonlitigating traumatic brain injury patients and 30 control participants were administered Faces under standard administration and instructed malingering conditions. Although the two groups obtained similar scores when taking the test under standard instructions, both groups produced significantly lower performances when instructed to malinger, indicating that Faces is sensitive to malingering, but less sensitive to traumatic brain injury. The total raw score provided stronger classification accuracy than an empirically weighted combination of the five easiest items (i.e., floor effect items). A raw score cutoff of 31 yielded the maximum classification accuracy with 93.3% sensitivity and 80.0% specificity. C1 Pacific Grad Sch Psychol, Palo Alto, CA USA. Permanente Med Grp Inc, Redwood City, CA USA. Wilford Hall USAF Med Ctr, Def & Vet Head Injury Program, Lackland AFB, TX 78236 USA. Wilford Hall USAF Med Ctr, Dept Neurol, Lackland AFB, TX 78236 USA. VA Palo Alto Healthcare Syst, Palo Alto, CA USA. Def & Vet Head Injury Program, Palo Alto, CA USA. RP Glassmire, DM (reprint author), Patton State Hosp, Dept Psychol, AX-234,31202 E Highland Ave, Patton, CA 92369 USA. NR 71 TC 15 Z9 15 U1 1 U2 1 PU SWETS ZEITLINGER PUBLISHERS PI LISSE PA P O BOX 825, 2160 SZ LISSE, NETHERLANDS SN 1380-3395 J9 J CLIN EXP NEUROPSYC JI J. Clin. Exp. Neuropsychol. PD JUN PY 2003 VL 25 IS 4 BP 465 EP 481 DI 10.1076/jcen.25.4.465.13875 PG 17 WC Psychology, Clinical; Clinical Neurology; Psychology SC Psychology; Neurosciences & Neurology GA 683GY UT WOS:000183141300003 PM 12911101 ER PT J AU Forney, JR Wongsrichanalai, C Magill, AJ Craig, LG Sirichaisinthop, J Bautista, CT Miller, RS Ockenhouse, CF Kester, KE Aronson, NE Andersen, EM Quino-Ascurra, HA Vidal, C Moran, KA Murray, CK DeWitt, CC Heppner, DG Kain, KC Ballou, WR Gasser, RA AF Forney, JR Wongsrichanalai, C Magill, AJ Craig, LG Sirichaisinthop, J Bautista, CT Miller, RS Ockenhouse, CF Kester, KE Aronson, NE Andersen, EM Quino-Ascurra, HA Vidal, C Moran, KA Murray, CK DeWitt, CC Heppner, DG Kain, KC Ballou, WR Gasser, RA TI Devices for rapid diagnosis of malaria: Evaluation of prototype assays that detect Plasmodium falciparum histidine-rich protein 2 and a Plasmodium vivax-specific antigen SO JOURNAL OF CLINICAL MICROBIOLOGY LA English DT Article ID P.F/P.V IMMUNOCHROMATOGRAPHIC TEST; POLYMERASE-CHAIN-REACTION; PARASIGHT-F; NONIMMUNE TRAVELERS; FIELD-EVALUATION; UNITED-KINGDOM; DIPSTICK TESTS; PCR; MICROSCOPY; MANAGEMENT AB The ParaSight F test was developed as a pioneer industry effort in the large-scale, process-controlled production of a device for the rapid diagnosis of malaria. This device performed well in field settings but was limited to the detection of a single malaria species, Plasmodium falciparum. The ParaSight F+V assay advanced upon the ParaSight F test format by incorporating a monoclonal antibody directed against a proprietary Plasmodium vivax-specific antigen, in addition to the antibody directed against P. falciparum histidine-rich protein 2, which was used in the ParaSight F assay. The modified assay was developed to add the capability to detect P. falciparum and P. vivax in a single-test-strip format. The present study evaluated three distinct ParaSight F+V prototypes with samples from symptomatic patients in regions of Thailand and Peru where malaria is endemic. Over a 2-year enrollment period (1998 and 1999), a total of 4,894 patients consented to participation in the study. Compared with the results for duplicate microscopic examinations of Giemsa-stained blood smears as the reference diagnostic standard, each successive prototype showed substantial improvement in performance. The final ParaSight F+V prototype, evaluated in 1999, had an overall sensitivity for detection of asexual P. falciparum parasites of 98%. The sensitivity of the device was 100% for P. falciparum densities of >500 parasites/mul, with a sensitivity of 83% for parasite densities of :less than or equal to500/mul. The specificity for the exclusion of P. falciparum was 93%. For P. vivax, the overall sensitivity was 87% for the final 1999 prototype. The sensitivities calculated for different levels of P. vivax parasitemia were 99% for parasite densities of >5,000/mul, 92% for parasite densities of 1,001 to 5,000/mul, 94% for parasite densities of 501 to 1,000/mul, and 55% for parasite densities of 1 to 500/mul. The specificity for the exclusion of P. vivax was 87%. The areas under the receiver operating characteristic curves for the diagnostic performance of the assay for the detection of P. falciparum and P. vivax were 0.8907 and 0.8522, respectively. These findings indicate that assays for rapid diagnosis have the potential to enhance diagnostic capabilities in those instances in which skilled microscopy is not readily available. C1 US Mil Acad, ATTN MADN C&LS, COL Forney, Official Mail & Distribuat Ctr, W Point, NY 10996 USA. Armed Forces Res Inst Med Sci, Bangkok 10400, Thailand. Vector Born Dis Control Off, Phrabuddhabat, Saraburi, Thailand. Naval Med Res Ctr Detachment, Lima, Peru. Hosp Apoyo, Iquitos, Peru. Walter Reed Army Med Ctr, Washington, DC 20307 USA. Walter Reed Army Inst Res, Silver Spring, MD USA. Toronto Gen Hosp, Toronto, ON, Canada. Univ Toronto, Toronto, ON, Canada. Brooke Army Med Ctr, San Antonio, TX USA. Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. RP Forney, JR (reprint author), US Mil Acad, ATTN MADN C&LS, COL Forney, Official Mail & Distribuat Ctr, 646 Swift Rd, W Point, NY 10996 USA. RI Kester, Kent/A-2114-2011; Bautista, Christian/B-2812-2011 OI Kester, Kent/0000-0002-5056-0802; NR 44 TC 42 Z9 45 U1 0 U2 6 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0095-1137 J9 J CLIN MICROBIOL JI J. Clin. Microbiol. PD JUN PY 2003 VL 41 IS 6 BP 2358 EP 2366 DI 10.1128/JCM.41.6.2358-2366.2003 PG 9 WC Microbiology SC Microbiology GA 688ZB UT WOS:000183466200015 PM 12791849 ER PT J AU Blitvich, BJ Bowen, RA Marlenee, NL Hall, RA Bunning, ML Beaty, BJ AF Blitvich, BJ Bowen, RA Marlenee, NL Hall, RA Bunning, ML Beaty, BJ TI Epitope-blocking enzyme-linked immunosorbent assays for detection of West Nile virus antibodies in domestic mammals SO JOURNAL OF CLINICAL MICROBIOLOGY LA English DT Article ID ENCEPHALITIS-VIRUS; UNITED-STATES; SERUM AB We evaluated the ability of epitope-blocking enzyme-linked immunosorbent assays (ELISAs) to detect West Nile virus (WNV) antibodies in domestic mammals. Sera were collected from experimentally infected horses, cats, and pigs at regular intervals and screened in ELISAs and plaque reduction neutralization tests. The diagnostic efficacies of these techniques were similar. C1 Colorado State Univ, Arthropod Borne & Infect Dis Lab, Dept Microbiol Immunol & Parasitol, Ft Collins, CO 80523 USA. Colorado State Univ, Anim Reprod & Biotechnol Lab, Equine Ctr, Ft Collins, CO 80523 USA. Univ Queensland, Dept Microbiol & Parasitol, St Lucia, Qld 4072, Australia. Ctr Dis Control & Prevent, Div Vector Borne Infect Dis, Ft Collins, CO 80522 USA. USAF, Off Surg Gen, Washington, DC 20332 USA. RP Beaty, BJ (reprint author), Colorado State Univ, Arthropod Borne & Infect Dis Lab, Dept Microbiol Immunol & Parasitol, Ft Collins, CO 80523 USA. FU ODCDC CDC HHS [U50 CCU820510] NR 17 TC 71 Z9 74 U1 0 U2 3 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0095-1137 J9 J CLIN MICROBIOL JI J. Clin. Microbiol. PD JUN PY 2003 VL 41 IS 6 BP 2676 EP 2679 DI 10.1128/JCM.41.6.2676-2679.2003 PG 4 WC Microbiology SC Microbiology GA 688ZB UT WOS:000183466200068 PM 12791902 ER PT J AU Wang, SQ Markiewicz, RS Giessen, BC AF Wang, SQ Markiewicz, RS Giessen, BC TI Phase equilibrium in Eu-Ba-Cu-O system SO JOURNAL OF CRYSTAL GROWTH LA English DT Article DE phase diagram; phase equilibrium; oxides; EuBa2Cu3O7-delta; superconductors ID SUPERCONDUCTOR POLYCRYSTALS; BIAXIAL ALIGNMENT; EUBA2CU3O7-DELTA EU-123; Y2O3-BAO-CUO; COMPATIBILITIES; 950-DEGREES-C AB We have reinvestigated the phase diagram of the Eu-Ba-Cu-O system at 950degreesC in the pertinent regions of its isobaric-isothermal sections, both in air and in pure oxygen, i.e., at 0.2 and 1.0 atm oxygen pressure. The results show that there is an equilibrium quadrilateral (with O-2 as the fifth phase) which is composed of the 123, 211, 011 and 143 phases (at a specified oxygen pressure). At higher temperatures, a diagonal tie-line exists between the 123 and 143 phases rather than between the 211 and 011 phase. At temperatures lower than the 5-phase equilibrium the tie-line connects the 211 and 011 phases. The equilibria change as a function of temperature has been studied hereby, and the resulting modification of the Eu-Ba-Cu-O phase diagram as a function of temperature and O-2 pressure is reported. The observed new high-temperature phase relationship allows the "143" phase to be considered instead of 011 as a possible pinning center in 123. This may have important implications with respect to raising the critical current density, J(c), of the EuBa2Cu3O7-delta high-T-c superconductor. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Northeastern Univ, Dept Chem, Boston, MA 02115 USA. Northeastern Univ, Barnett Inst, Boston, MA 02115 USA. Northeastern Univ, Dept Phys, Boston, MA 02115 USA. RP Wang, SQ (reprint author), USAF, Res Lab, 80,Scott Dr, Hanscom AFB, MA 01731 USA. NR 15 TC 2 Z9 2 U1 2 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD JUN PY 2003 VL 254 IS 1-2 BP 279 EP 284 DI 10.1016/S0022-0248(03)01159-X PG 6 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 684YU UT WOS:000183234700038 ER PT J AU Roberts, HW Kuehne, JC Stone, ME Pederson, ED Ragain, JC AF Roberts, H. W. Kuehne, J. C. Stone, M. E. Pederson, E. D. Ragain, J. C., Jr. TI Effects of disinfectants on soluble mercury from dental amalgam. SO JOURNAL OF DENTAL RESEARCH LA English DT Meeting Abstract C1 USAF, Dent Invest Serv, Great Lakes Naval Traning Ctr, Great Lakes, IL USA. Naval Inst Dent & Biomed Res, Great Lakes, IL USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R PI ALEXANDRIA PA 1619 DUKE ST, ALEXANDRIA, VA 22314-3406 USA SN 0022-0345 J9 J DENT RES JI J. Dent. Res. PD JUN PY 2003 VL 82 SI B MA 0943 BP B130 EP B130 PG 1 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA V42UY UT WOS:000202893601155 ER PT J AU Stover, RE Yang, Y Brambila, C Boland, E Carnes, D Ong, JL AF Stover, R. E. Yang, Y. Brambila, C. Boland, E. Carnes, D. Ong, J. L. TI The effects of sputtered calcium phosphate coatings of different crystallinity on osteohlast control of osteoclast progenitor cells. SO JOURNAL OF DENTAL RESEARCH LA English DT Meeting Abstract C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. Univ Texas, Hlth Sci Ctr, San Antonio, TX USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R PI ALEXANDRIA PA 1619 DUKE ST, ALEXANDRIA, VA 22314-3406 USA SN 0022-0345 J9 J DENT RES JI J. Dent. Res. PD JUN PY 2003 VL 82 SI B MA 0262 BP B45 EP B45 PG 1 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA V42UY UT WOS:000202893600260 ER PT J AU Katayama, AD Crooks, SM AF Katayama, AD Crooks, SM TI Online notes: Differential effects of studying complete or partial graphically organized notes SO JOURNAL OF EXPERIMENTAL EDUCATION LA English DT Article DE electronic study notes; graphic organizers; note taking ID COGNITIVE-PROCESSES; VISUAL ARGUMENT; NOTE-TAKING; TEXT; LECTURE; RECALL; STRATEGIES; SUMMARIES; KNOWLEDGE; MODEL AB The authors investigated in this study the effects of two electronic notes conditions (complete vs. partial) and two testing conditions (immediate vs. delayed) on three types of tests (fact, structure, and application). A 2 x 2 factorial multivariate analysis of variance (MANOVA) yielded no significant main effects for notes conditions on the fact and structure tests. The results did show a significant main effect for notes conditions (partial > control) on the application test and for testing condition. Students tested immediately performed significantly better than those in the delayed condition on all three outcome measures. Results also show significant interactions between Notes Condition x Testing Condition on the structure and application tests. Implications and limitations of computerized notes are discussed. C1 USAF Acad, DBFL, Colorado Springs, CO 80840 USA. Texas Tech Univ, Lubbock, TX 79409 USA. RP Katayama, AD (reprint author), USAF Acad, DBFL, 2354 Fairchild Dr,6L101B, Colorado Springs, CO 80840 USA. NR 51 TC 16 Z9 16 U1 2 U2 6 PU HELDREF PUBLICATIONS PI WASHINGTON PA 1319 EIGHTEENTH ST NW, WASHINGTON, DC 20036-1802 USA SN 0022-0973 J9 J EXP EDUC JI J. Exp. Educ. PD SUM PY 2003 VL 71 IS 4 BP 293 EP 312 PG 20 WC Education & Educational Research; Psychology, Educational SC Education & Educational Research; Psychology GA 731VB UT WOS:000185906200001 ER PT J AU Anderson, MA Gillig, PM Sitaker, M McCloskey, K Malloy, K Grigsby, N AF Anderson, MA Gillig, PM Sitaker, M McCloskey, K Malloy, K Grigsby, N TI ''Why doesn't she just leave?": A descriptive study of victim reported impediments to her safety SO JOURNAL OF FAMILY VIOLENCE LA English DT Article DE domestic violence; victim; barrier; escape AB Responses of victims at a domestic violence advocacy center indicate that barriers exist to seeking help that are often overlooked by many mental health professionals. This descriptive study retrospectively examined 485 victim surveys gathered in a domestic violence advocacy center (Artemis Center for Alternatives to Domestic Violence) in Dayton, Ohio, over 12 months. Various reasons for returning included lack of money (45.9%, n = 184), lack of a place to go (28.5%, n = 114), and lack of police help (13.5%, n = 54). Reasons for returning indicated that barriers prevented the victim from being safe. The Barrier Model as proposed by N. Grigsby and B. Hartman (Grigsby, N. & Hartman, B. 1997, Psychotherapy 31: 465-497) is used as a vehicle to explain these findings. This model incorporates four concentric rings with the victim in the center as the innermost ring. The rings in order of external to internal represent the environmental barriers, family and social role expectations, and the psychological impact of the abuse. C1 Wright State Univ, Sch Med, Dept Psychiat, Dayton, OH USA. Montgomery Cty Combined Hlth Dist, Dayton, OH USA. Wright State Univ, Sch Profess Psychol, Dayton, OH 45435 USA. Artemis Ctr Alternat Domest Violence, Dayton, OH USA. RP Anderson, MA (reprint author), 149 Hart St Suite, Sheppard AFB, TX 76311 USA. NR 14 TC 51 Z9 51 U1 1 U2 7 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0885-7482 J9 J FAM VIOLENCE JI J. Fam. Violence PD JUN PY 2003 VL 18 IS 3 BP 151 EP 155 DI 10.1023/A:1023564404773 PG 5 WC Psychology, Clinical; Family Studies SC Psychology; Family Studies GA 671RW UT WOS:000182478700003 ER PT J AU Pierce, JL Zawada, LP Srinivasan, R AF Pierce, JL Zawada, LP Srinivasan, R TI Tensile properties of Nicalon fiber-reinforced carbon following aerospace turbine engine testing SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE LA English DT Article DE ceramic matrix composites (CMCs); Nicalon silicon carbide fiber (SiC/C); tensile properties; turbine engine testing AB The durability of coated Nicalon silicon carbide fiber-reinforced carbon (SiC/C) as the flap and seal exhaust nozzle components in a military aerospace turbine engine was studied. Test specimens machined from both a flap and a seal component were tested for residual strength following extended ground engine testing on a General Electric F414 afterburning turbofan engine. Although small amounts of damage to the protective exterior coating were identified on each component following engine testing, the tensile strengths were equal to the as-fabricated tensile strength of the material. Differences in strength between the two components and variability within the data sets could be traced back to the fabrication process using witness coupon test data from the manufacturer. It was also observed that test specimens machined transversely across the flap and seal components were stronger than those machined along the length. The excellent retained strength of the coated SiC/C material after extended exposure to the severe environment in the afterburner exhaust section of an aerospace turbofan engine has resulted in this material being selected as the baseline material for the F414 exhaust nozzle system. C1 USAF, AF Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45417 USA. Wright State Univ, Dept Mech & Mat Engn, Dayton, OH 45435 USA. RP Pierce, JL (reprint author), USAF, AF Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45417 USA. NR 10 TC 4 Z9 4 U1 0 U2 4 PU ASM INTERNATIONAL PI MATERIALS PARK PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002 USA SN 1059-9495 J9 J MATER ENG PERFORM JI J. Mater. Eng. Perform. PD JUN PY 2003 VL 12 IS 3 BP 354 EP 362 DI 10.1361/105994903770343222 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA 691EJ UT WOS:000183591600017 ER PT J AU Brannon, RB Fowler, CB AF Brannon, RB Fowler, CB TI Intraneural epithelial islands associated with a periapical granuloma: A cause for concern? SO JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY LA English DT Editorial Material C1 Louisiana State Univ, Sch Dent, Dept Oral & Maxillofacial Surg, Hlth Sci Ctr, New Orleans, LA 70119 USA. Wilford Hall USAF Med Ctr, Dept Oral & Maxillofacial Pathol, Dent Squadron 59, Lackland AFB, TX USA. RP Brannon, RB (reprint author), Louisiana State Univ, Sch Dent, Dept Oral & Maxillofacial Surg, Hlth Sci Ctr, 1100 Florida Ave, New Orleans, LA 70119 USA. NR 12 TC 3 Z9 3 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 USA SN 0278-2391 J9 J ORAL MAXIL SURG JI J. Oral Maxillofac. Surg. PD JUN PY 2003 VL 61 IS 6 BP 725 EP 728 DI 10.1053/joms.2003.50144 PG 4 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA 685PP UT WOS:000183272700021 PM 12796887 ER PT J AU Fellner, JP Loeber, GJ Vukson, SP Riepenhoff, CA AF Fellner, JP Loeber, GJ Vukson, SP Riepenhoff, CA TI Lithium-ion testing for spacecraft applications SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE lithium-ion battery; spacecraft; LEO; GEO; rechargeable AB The Air Force Research Laboratory is developing lithium-ion batteries for low earth orbit (LEO) and geosynchronous earth orbit (GEO) spacecraft applications. As a part of this lithium-ion battery development effort, a testing program is underway to determine the viability of lithium-ion batteries for LEO/GEO applications. For LEO, lithium-ion battery cycle lifetimes of >60,000 cycles at 25% depth-of-discharge (DOD) are projected. For GEO, lifetimes of >14 years at 80% depth-of-discharge are projected. (C) 2003 Elsevier Science B.V. All rights reserved. C1 USAF, Prop Directorate, Wright Patterson AFB, OH 45433 USA. Wyle Labs, Tech Support Serv, Dayton, OH 45431 USA. RP Fellner, JP (reprint author), USAF, Prop Directorate, 1950 5th St, Wright Patterson AFB, OH 45433 USA. NR 6 TC 17 Z9 17 U1 2 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 911 EP 913 DI 10.1016/S0378-7753(03)00222-2 PG 3 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600170 ER PT J AU McFarland, MJ Terry, SH Stone, DA Rasmussen, SL Calidonna, MJ AF McFarland, MJ Terry, SH Stone, DA Rasmussen, SL Calidonna, MJ TI Evaluation of the digital opacity compliance system in high mountain desert environments SO JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION LA English DT Article AB The digital opacity compliance system (DOCS) has been proposed as an alternative to the U.S. Environmental Protection Agency Reference Method 9 (Visual Determination of the Opacity of Emissions for Stationary Sources). The DOCS, which employs standard digital photography to estimate the opacity of visible emissions, was evaluated in a high mountain desert environment located in Weber County, UT. The DOCS recorded an average opacity deviation of 5.28% when applied to black smoke plumes having true opacities in the range of 0-100%, an error rate that was found to be significantly less than 7.5% (allowable error rate for attaining certification under Method 9). In contrast, results from estimating the opacity of white smoke plumes indicated that the accuracy of the DOCS was less than the Method 9 error rate only in the opacity range of 0-60%, over which the DOCS average opacity deviation was determined to be 6.7%. For the 0-40% opacity range, the DOCS recorded an average opacity deviation of 5.44% and 5.9% for black and white plumes, respectively. Results from the present study suggest that the DOCS has the potential to quantify visible opacity with an error rate that is significantly less than the Method 9 permissible error rate. Although encouraging, it is unclear to what extent the DOCS is affected by climatic conditions other than those encountered in a dry desert environment. Future studies. should focus on evaluating the performance of the DOCS under variable weather conditions. C1 Utah State Univ, Dept Civil & Environm Engn, Logan, UT 84321 USA. Hill AFB, Environm Management Directorate, Ogden, UT USA. Tyndall AFB, Engn & Serv Res Lab, Panama City, FL USA. RP McFarland, MJ (reprint author), Utah State Univ, Dept Civil & Environm Engn, 130 South 1000 East,River Hts, Logan, UT 84321 USA. NR 9 TC 8 Z9 8 U1 1 U2 2 PU AIR & WASTE MANAGEMENT ASSOC PI PITTSBURGH PA ONE GATEWAY CENTER, THIRD FL, PITTSBURGH, PA 15222 USA SN 1047-3289 J9 J AIR WASTE MANAGE JI J. Air Waste Manage. Assoc. PD JUN PY 2003 VL 53 IS 6 BP 724 EP 730 PG 7 WC Engineering, Environmental; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 687FG UT WOS:000183365100005 PM 12828332 ER PT J AU Zawada, LP Hay, RS Lee, SS Staehler, J AF Zawada, LP Hay, RS Lee, SS Staehler, J TI Characterization and high-temperature mechanical behavior of an oxide/oxide composite SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID CERAMIC-MATRIX COMPOSITES; ELECTRON-MICROSCOPY; MONAZITE COATINGS; BORON-NITRIDE; FIBER; PERFORMANCE; STRENGTH; INTERFACES; DAMAGE; DENSIFICATION AB An oxide/oxide ceramic fiber-matrix composite (CMC) has been extensively characterized for high-temperature aerospace structural applications. This CMC is called GEN-IV(TM), and it has a porous and cracked aluminosilicate matrix reinforced by 3M Nextel 610(TM) alumina fibers woven in a balanced eight harness weave (8HSW). This CMC has been specifically designed without an interphase between the fiber and matrix, and it relies on the porous matrix for flaw tolerance. Stress-strain response is nearly linear to failure and without a well-defined proportional limit in tension and compression. In-plane shear and interlaminar strength increases with increasing temperature. The 1000degreesC fatigue limit in air at 105 cycles is 160 MPa, and the residual tensile strength of run-out specimens is not affected by the fatigue loading. The creep-rupture resistance above 1000degreesC is relatively poor, but it can be improved with a more-creep-resistant fiber. C1 USAF, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. RP Zawada, LP (reprint author), USAF, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. NR 62 TC 61 Z9 61 U1 8 U2 35 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43086-6136 USA SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD JUN PY 2003 VL 86 IS 6 BP 981 EP 990 PG 10 WC Materials Science, Ceramics SC Materials Science GA 689NF UT WOS:000183499200017 ER PT J AU Kolettis, PN Sabanegh, ES Nalesnik, JG D'Amico, AM Box, LC Burns, JR AF Kolettis, PN Sabanegh, ES Nalesnik, JG D'Amico, AM Box, LC Burns, JR TI Pregnancy outcomes after vasectomy reversal for female partners 35 years old or older SO JOURNAL OF UROLOGY LA English DT Article DE vasovasostomy; oligospermia; vasectomy; pregnancy ID INTRACYTOPLASMIC SPERM INJECTION; CUMULATIVE DELIVERY RATES; VASOEPIDIDYMOSTOMY; FERTILIZATION; WOMEN; MEN; AGE AB Purpose: We review the outcomes after vasectomy reversal for couples with female partners 35 years old or older. Materials and Methods: A retrospective review of experience at 2 institutions was performed. Patency was defined as the presence of motile sperm. Patients with less than 6 months of followup were excluded from the patency rate analysis unless they had sperm in the semen. Similarly, patients with less than 12 months of followup or no ongoing interest in establishing conception were excluded from the pregnancy rate analysis unless they had established a pregnancy or they were azoospermic with sufficient followup. Results: A total of 46 men with partners 35 years old or older underwent vasectomy reversal at 2 institutions. Mean partner age was 37 2 years, and median obstructive interval was 10 years. Bilateral vasovasostomy was performed in 43 men, unilateral vasovasostomy in 2 and vasovasostomy/vasoepididymostomy in 1. Of the 46 men 27 had followup semen analyses with a patency rate of 81% (22). Transient patency occurred in 2 cases (7%). Pregnancy occurred in 35% of the couples (14 of 40 patients) with sufficient followup. The ongoing/live delivery rate was 33% (13 of 40 cases). The pregnancy and ongoing/delivery rates were 46% (12 of 26 patients) and 46% (12 of 26) for female partners 35 to 39 years old, and 14% (2 of 14) and 7% (1 of 14) for female partners older than 40, respectively. Conclusions: Vasectomy reversal offers reasonable chance for success when the female partner is 35 years old or older. The chance for success is similar to that of a single cycle of in vitro fertilization with intracytoplasmic sperm injection. These couples should not be eliminated from consideration for reversal simply because the female partner is 35 years old or older. C1 Univ Alabama, Dept Surg, Div Urol, Birmingham, AL 35294 USA. Wilford Hall USAF Med Ctr, Dept Urol, Lackland AFB, TX 78236 USA. RP Kolettis, PN (reprint author), Univ Alabama, Dept Surg, Div Urol, Birmingham, AL 35294 USA. NR 16 TC 23 Z9 27 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0022-5347 J9 J UROLOGY JI J. Urol. PD JUN PY 2003 VL 169 IS 6 BP 2250 EP 2252 DI 10.1097/01.ju.0000063780.74931.d6 PG 3 WC Urology & Nephrology SC Urology & Nephrology GA 679NU UT WOS:000182929500067 PM 12771762 ER PT J AU Blodgett, MP Ukpabi, CV Nagy, PB AF Blodgett, MP Ukpabi, CV Nagy, PB TI Surface roughness influence on eddy current electrical conductivity measurements SO MATERIALS EVALUATION LA English DT Article DE eddy current testing; shot peening; residual stress; surface roughness ID RESIDUAL-STRESSES; METALS AB The measurement of eddy current conductivity, in view of its frequency dependent penetration depth, has been suggested as a possible means to allow the nondestructive testing (NDT) of subsurface residual stresses in shot peened specimens. This paper addresses the apparent reduction of the near surface electrical conductivity measured by the eddy current method in the presence of surface roughness, Experimental results are presented on shot peened pure (C11000) copper, in which the effect is particularly strong and readily measurable because of the low penetration depth caused by the very high electric conductivity of the material. Eight shot peened samples between almen intensities 2 and 16 were thermally treated and tested by X-ray diffraction measurements until the residual stress and cold work fully dissipated, leaving only the surface roughness. Eddy current electrical conductivity measurements were carried out on each fully relaxed shot peened copper specimen over a wide frequency range from 1 kHz to 10 MHz. Our results show that surface roughness, acting alone, causes a strong apparent reduction of up to 10 to 20% of the measured electrical conductivity in shot peened copper. These results can be used to estimate the much smaller effect of surface roughness on the testing of shot peened turbine engine materials, which typically have approximately 100 times lower conductivity than pure copper and therefore exhibit 10 times higher penetration depth at the same test frequency. A comparison of the predicted underestimation of the electrical conductivity in the presence of surface roughness to the expected less than 1% conductivity increase due to compressive near surface residual stresses indicates that the described artifact can significantly affect eddy current testing of shot peened turbine engine alloys, such as Ti-6Al-4V or IN100. C1 AFRL, Mat & Mfg Directorate, Met Ceram & NDE Div, Wright Patterson AFB, OH 45433 USA. Univ Cincinnati, Dept Aerosp Engn & Engn Mech, Cincinnati, OH 45221 USA. RP Blodgett, MP (reprint author), AFRL, Mat & Mfg Directorate, Met Ceram & NDE Div, Wright Patterson AFB, OH 45433 USA. RI Nagy, Peter/O-5404-2016 OI Nagy, Peter/0000-0001-5715-2409 NR 21 TC 11 Z9 12 U1 0 U2 5 PU AMER SOC NON-DESTRUCTIVE TEST PI COLUMBUS PA 1711 ARLINGATE LANE PO BOX 28518, COLUMBUS, OH 43228-0518 USA SN 0025-5327 J9 MATER EVAL JI Mater. Eval. PD JUN PY 2003 VL 61 IS 6 BP 765 EP 772 PG 8 WC Materials Science, Characterization & Testing SC Materials Science GA 687QH UT WOS:000183387700006 ER PT J AU Misra, RDK Kale, A Srivastava, RS Senkov, ON AF Misra, RDK Kale, A Srivastava, RS Senkov, ON TI Synthesis of nanocrystalline nickel and zinc ferrites by microemulsion technique SO MATERIALS SCIENCE AND TECHNOLOGY LA English DT Article ID MAGNETIC-PROPERTIES; REVERSE MICELLES; NIFE2O4 POWDERS; PARTICLES AB To use the unique properties of nanocrystalline ferrites in magneto-optical devices, it is important that they have a narrow particle size distribution. The present paper illustrates the potential of the microemulsion technique to synthesise different nanocrystalline ferrites (nickel ferrites, zinc ferrites) with such a narrow particle size distribution. The results of preliminary characterisation by field emission scanning electron microscopy, transmission electron microscopy, and X-ray diffraction are presented, confirming the nanocrystalline and spinel crystallographic structure of nickel ferrites. C1 Univ SW Louisiana, Mat Sci & Engn Grp, Dept Chem Engn, Lafayette, LA 70504 USA. Univ SW Louisiana, Dept Chem, Lafayette, LA 70504 USA. USAF, Wright Lab, Wright Patterson AFB, OH 45733 USA. RP Misra, RDK (reprint author), Univ SW Louisiana, Mat Sci & Engn Grp, Dept Chem Engn, POB 44130, Lafayette, LA 70504 USA. RI Senkov, Oleg/C-7197-2012 OI Senkov, Oleg/0000-0001-5587-415X NR 22 TC 42 Z9 42 U1 1 U2 9 PU MANEY PUBLISHING PI LEEDS PA HUDSON RD, LEEDS LS9 7DL, ENGLAND SN 0267-0836 J9 MATER SCI TECH-LOND JI Mater. Sci. Technol. PD JUN PY 2003 VL 19 IS 6 BP 826 EP 830 DI 10.1179/026708303225003018 PG 5 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 698DY UT WOS:000183983400025 ER PT J AU Chen, CG Curliss, D AF Chen, CG Curliss, D TI Processing and morphological development of montmorillonite epoxy nanocomposites SO NANOTECHNOLOGY LA English DT Article ID LAYERED SILICATE NANOCOMPOSITES; CLAY NANOCOMPOSITES; POLYMER NANOCOMPOSITES; MECHANICAL-PROPERTIES; EXFOLIATION BEHAVIOR; RESIN AB Polymer-layerec silicate nanocomposites are new hybrid polymeric materials with nanometre thick layered silicates that generally show improvement over the properties of polymeric materials. This paper reports that synthesized organolayered silicates can be used to make epoxy nanocomposites. The nanocomposites were characterized by wide-angle x-ray diffraction, small-angle x-ray scattering (SAXS) and transmission electron microscopy. The studies on in situ SAXS and differential scanning calorimetry were carried out to gain an understanding of the morphological development of a nanocomposite during processing. The storage and glass transition temperature of the nanocomposite were also studied by dynamic mechanical analysis. C1 Univ Dayton, Res Inst, Dayton, OH 45469 USA. USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. RP Chen, CG (reprint author), Univ Dayton, Res Inst, 300 Coll Pk, Dayton, OH 45469 USA. EM Chenggang.Chen@wpafb.af.mil NR 23 TC 86 Z9 88 U1 0 U2 7 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0957-4484 J9 NANOTECHNOLOGY JI Nanotechnology PD JUN PY 2003 VL 14 IS 6 BP 643 EP 648 AR PII S0957-4484(03)55847-0 DI 10.1088/0957-4484/14/6/315 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied SC Science & Technology - Other Topics; Materials Science; Physics GA 698RA UT WOS:000184011500015 ER PT J AU Butler, MA Bennett, TL AF Butler, MA Bennett, TL TI In search of a conceptualization of multiple sclerosis: A historical perspective SO NEUROPSYCHOLOGY REVIEW LA English DT Article DE multiple sclerosis; history; demyelinating disease; cognitive deficits AB A thorough understanding of Multiple Sclerosis (MS) is necessary to offer individuals informed options for treatment and planning. To assist in this quest, the following historical analysis examined how MS has been conceived from the 14th century through the early 20th century. Primary sources were consulted whenever possible, and many of the original archival materials were accessed by the first author (MB) during an on-site visit to the Rare Book Room of the New York Academy of Medicine. There is a striking similarity between how MS symptoms have presented throughout history compared with the 21st century. Sensorimotor and cognitive sequelae have been observed in patients since the 1800s. Cognitive symptoms were acknowledged in the 1800s, but disregarded in the early 1900s and were not given recognition again until the latter part of the 20th century. If conceptualizations of MS are inaccurate, patients will not be served well. In contrast to the shared symptomatology across time, early conceptualizations of etiology and treatment choices differed dramatically from today, a genuine reflection of the times in which they were created. C1 USAF Acad, DFBL, Dept Behav Sci & Leadership, Colorado Springs, CO 80840 USA. Ctr Neurorehabil Serv, Ft Collins, CO USA. Colorado State Univ, Ft Collins, CO 80523 USA. RP Butler, MA (reprint author), USAF Acad, DFBL, Dept Behav Sci & Leadership, 2354 Fairchild Dr, Colorado Springs, CO 80840 USA. NR 24 TC 6 Z9 6 U1 1 U2 4 PU CONSULTANTS BUREAU PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1040-7308 J9 NEUROPSYCHOL REV JI Neuropsychol. Rev. PD JUN PY 2003 VL 13 IS 2 BP 93 EP 112 DI 10.1023/A:1023884322540 PG 20 WC Psychology, Clinical; Neurosciences SC Psychology; Neurosciences & Neurology GA 693AH UT WOS:000183692100003 PM 12887041 ER PT J AU Heil, T Fischer, I Elsasser, W Krauskopf, B Green, K Gavrielides, A AF Heil, T Fischer, I Elsasser, W Krauskopf, B Green, K Gavrielides, A TI Delay dynamics of semiconductor lasers with short external cavities: Bifurcation scenarios and mechanisms SO PHYSICAL REVIEW E LA English DT Article ID LOW-FREQUENCY FLUCTUATIONS; OPTICAL FEEDBACK; COHERENCE COLLAPSE; SUBJECT; SYNCHRONIZATION; PERSPECTIVE; EQUATIONS AB We present a comprehensive study of the emission dynamics of semiconductor lasers induced by delayed optical feedback from a short external cavity. Our analysis includes experiments, numerical modeling, and bifurcation analysis by means of computing unstable manifolds. This provides a unique overview and a detailed insight into the dynamics of this technologically important system and into the mechanisms leading to delayed feedback instabilities. By varying the external cavity phase, we find a cyclic scenario leading from stable intensity emission via periodic behavior to regular and irregular pulse packages, and finally back to stable emission. We reveal the underlying interplay of localized dynamics and global bifurcations. C1 Tech Univ Darmstadt, Inst Angew Phys, D-64289 Darmstadt, Germany. Univ Bristol, Dept Engn Math, Bristol, Avon, England. USAF, Nonlinear Opt Ctr, Res Lab, DELO, Kirtland AFB, NM 87117 USA. RP Tech Univ Darmstadt, Inst Angew Phys, Schlossgartenstr 7, D-64289 Darmstadt, Germany. RI Fischer, Ingo/C-2843-2011 OI Fischer, Ingo/0000-0003-1881-9842 NR 33 TC 113 Z9 114 U1 1 U2 9 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0045 EI 2470-0053 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2003 VL 67 IS 6 AR 066214 DI 10.1103/PhysRevE.67.066214 PN 2 PG 11 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 699YN UT WOS:000184085000048 PM 16241333 ER PT J AU Roy, S Pandey, BP Poggie, J Gaitonde, DV AF Roy, S Pandey, BP Poggie, J Gaitonde, DV TI Modeling low pressure collisional plasma sheath with space-charge effect SO PHYSICS OF PLASMAS LA English DT Article ID CONFERENCE REFERENCE REACTOR; HALL THRUSTER; DISCHARGES AB The present work develops a computationally efficient one-dimensional subgrid embedded finite element formulation for plasma-sheath dynamics. The model incorporates space-charge effect throughout the whole plasma and the sheath region using multifluid equations. Secondary electron emission is not considered. A third-order temperature dependent polynomial is used to self-consistently calculate the rate of ionization in the plasma dynamic equations. The applications include dc and rf sheath inside a glow discharge tube where the noble gas is immobile, and a partially ionized plasma sheath inside an electric propulsion thruster channel in which the gas flows. The electron and ion number densities of the numerical solution decrease in the sheath region as expected. The ion velocity and electron temperature profiles also exhibit the expected behavior. The computed sheath potential compares well with the available experimental data. (C) 2003 American Institute of Physics. C1 Kettering Univ, Computat Plasma Dynam Lab, Flint, MI 48532 USA. USAF, Res Lab, Air Vehicles Directorate, Computat Sci Branch, Wright Patterson AFB, OH 45433 USA. RP Roy, S (reprint author), Kettering Univ, Computat Plasma Dynam Lab, Flint, MI 48532 USA. RI Roy, Subrata/A-7493-2009 NR 28 TC 22 Z9 22 U1 1 U2 7 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD JUN PY 2003 VL 10 IS 6 BP 2578 EP 2585 DI 10.1063/1.1572491 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 686HX UT WOS:000183316500045 ER PT J AU Baek, JB Tan, LS AF Baek, JB Tan, LS TI Linear-hyperbranched copolymerization as a tool to modulate thermal properties and crystallinity of a para-poly(ether-ketone) SO POLYMER LA English DT Article DE 3,5-bis(4-fluorobenzoyl)phenol; 4-fluoro-4 '-hydroxybenzophenone; linear-hyperbranched copolymer ID AROMATIC POLYAMIDE COPOLYMERS; POLYMER SYNTHESES; DIRECT POLYCONDENSATION; POLY(ETHER KETONES); ACID; MONOMERS; AB(2); AB AB The AB(2) monomer, 3,5-bis(4-fluorobenzoyl)phenol was synthesized via an improved four-step scheme. It was polymerized to form the corresponding fluoride-terminated hyperbranched polymer with higher molecular weight than previously reported, as evidenced by higher glass-transition temperature (T-g = 159 degreesC vs. 140-143 degreesC). The homopolymerization showed a bimodal molecular weight distribution that was also observed for other related linear-hyperbranched systems. The AB(2) monomer was then copolymerized with 4-fluoro-4'-hydroxybenzophenone (AB monomer), in weight ratios of 1:3, 1:1 and 3:1 to afford the respective hyperbranched poly(ether-ketones) with variable degrees of branching. The 1:1 copolymer had T-g value (212 degreesC) that was significantly (35 degreesC) higher than both linear and hyperbranched homopolymers. Only the 1:3 copolymer was semi-crystalline, displaying melting at 340 degreesC and its wide angle X-ray scattering (WAXS) pattern indicated that its crystal structure is exactly the same as that of the linear homopolymer. The WAXS results of the copolymers correlated well with differential scanning calorimetry and themogravimetric analysis results. Published by Elsevier Science Ltd. C1 USAF, Res Lab, Mfg Technol Directorate, MLBP, Wright Patterson AFB, OH 45433 USA. USAF, Res Lab, Mfg Technol Directorate, Polymer Branch, Wright Patterson AFB, OH 45433 USA. Univ Dayton, Res Inst, Dayton, OH 45469 USA. RP Tan, LS (reprint author), USAF, Res Lab, Mfg Technol Directorate, MLBP, 2491 P St,Room 136, Wright Patterson AFB, OH 45433 USA. RI Baek, Jong-Beom/E-5883-2010; Tan, Loon-Seng/F-6985-2012 OI Baek, Jong-Beom/0000-0003-4785-2326; Tan, Loon-Seng/0000-0002-2134-9290 NR 30 TC 25 Z9 29 U1 1 U2 6 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0032-3861 J9 POLYMER JI Polymer PD JUN PY 2003 VL 44 IS 12 BP 3451 EP 3459 DI 10.1016/S0032-3861(03)00163-0 PG 9 WC Polymer Science SC Polymer Science GA 682HT UT WOS:000183086200003 ER PT J AU Stytz, MR Banks, SB AF Stytz, MR Banks, SB TI Progress and prospects for the development of computer-generated actors for military simulation: Part I - Introduction and background SO PRESENCE-TELEOPERATORS AND VIRTUAL ENVIRONMENTS LA English DT Article ID ENVIRONMENTS AB The development of computer-generated synthetic environments, also called distributed virtual environments, for military simulation relies heavily upon computer-generated actors (CGAs) to provide accurate behaviors at reasonable cost so that the synthetic environments are useful, affordable, complex, and realistic. Unfortunately, the pace of synthetic environment development and the level of desired CGA performance continue to rise at a much faster rate than CGA capability improvements. This insatiable demand for realism in CGAs for synthetic environments arises from the growing understanding of the significant role that modeling and simulation can play in a variety of venues. These uses include training, analysis, procurement decisions, mission rehearsal, doctrine development, force-level and task-level training, information assurance, cyberwarfare, force structure analysis, sustainability analysis, life cycle costs analysis, material management, infrastructure analysis, and many others. In these and other uses of military synthetic environments, computer-generated actors play a central role because they have the potential to increase the realism of the environment while also reducing the cost of operating the environment. The progress made in addressing the technical challenges that must be overcome to realize effective and realistic CGAs for military simulation environments and the technical areas that should be the focus of future work are the subject of this series of papers, which survey the technologies and progress made in the construction and use of CGAs. In this, the first installment in the series of three papers, we introduce the topic of computer-generated actors and issues related to their performance and fidelity and other background information for this research area as related to military simulation. We also discuss CGA reasoning system techniques and architectures. C1 USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. USAF, Res Lab, Orlando, FL 32828 USA. RP Stytz, MR (reprint author), USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. NR 79 TC 6 Z9 6 U1 1 U2 2 PU M I T PRESS PI CAMBRIDGE PA FIVE CAMBRIDGE CENTER, CAMBRIDGE, MA 02142 USA SN 1054-7460 J9 PRESENCE-TELEOP VIRT JI Presence-Teleoper. Virtual Env. PD JUN PY 2003 VL 12 IS 3 BP 311 EP 325 DI 10.1162/105474603765879558 PG 15 WC Computer Science, Cybernetics; Computer Science, Software Engineering SC Computer Science GA 690CD UT WOS:000183529000005 ER PT J AU Jha, SK Larsen, JM Rosenberger, AH Hartman, GA AF Jha, SK Larsen, JM Rosenberger, AH Hartman, GA TI Dual fatigue failure modes in Ti-6Al-2Sn-4Zr-Wo and consequences on probabilistic life prediction SO SCRIPTA MATERIALIA LA English DT Article DE microstructure; fatigue life variability; probability of failure; cumulative distribution function ID ALLOYS AB The variability in fatigue life of the Ti-6Al-2Sn-4Zr-6Mo (Ti-6-2-4-6) alloy was investigated, Cumulative life distribution plots were found to be composed of two failure mechanisms. The data could be closely represented by a cumulative distribution function (CDF) resulting from the superposition of the CDFs of the individual mechanisms. An approach for life prediction based on the data due to the worst-case mechanism is suggested. Published by Elsevier Science Ltd. on behalf of Acta Materialia Inc. C1 Syst Fed Corp, Behav & Life Predict, Dayton, OH 45431 USA. USAF, Res Lab, Mat & Mfg Directorate, MLLMN, Wright Patterson AFB, OH 45433 USA. Univ Dayton, Res Inst, Dayton, OH 45469 USA. RP Jha, SK (reprint author), Syst Fed Corp, Behav & Life Predict, 4027 Col Glenn Hwy,Suite 210, Dayton, OH 45431 USA. NR 14 TC 36 Z9 37 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD JUN PY 2003 VL 48 IS 12 BP 1637 EP 1642 DI 10.1016/S1359-6462(03)00132-5 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 676YB UT WOS:000182779200012 ER PT J AU Splichal, JE Stamm, JA Ornstein, DL AF Splichal, JE Stamm, JA Ornstein, DL TI The statins: Multifunctional antithrombotic and antineoplastic drugs SO SEMINARS IN THROMBOSIS AND HEMOSTASIS LA English DT Review DE statins; thrombosis; cancer ID HMG-COA-REDUCTASE; COENZYME-A REDUCTASE; C-REACTIVE PROTEIN; VASCULAR SMOOTH-MUSCLE; PLASMINOGEN-ACTIVATOR INHIBITOR-1; CORONARY-ARTERY DISEASE; HUMAN ENDOTHELIAL-CELLS; MONOCYTE-TISSUE-FACTOR; NITRIC-OXIDE-SYNTHASE; LOVASTATIN-INDUCED APOPTOSIS AB Statins are approved by the Food and Drug Administration (FDA) for the treatment of hypercholesterolemia and have shown remarkable activity in preventing cardiovascular morbidity and mortality. The versatility of statins is increasingly being appreciated, however, and lowering cholesterol is only one attribute among many shared by this class of drugs. Most statins appear to have antithrombotic activity that is unrelated to the ability to reduce cholesterol levels, and several have significant antitumor effects. This article reviews the laboratory and clinical evidence that statins have antithrombotic and anticancer activity, discusses the ways in which these two activities intersect, and proposes novel uses for statins for the treatment of conditions other than hypercholesterolemia. C1 Univ Vermont, Coll Med, Hematol Oncol Unit, Burlington, VT 05401 USA. Wilford Hall USAF Med Ctr, Dept Hematol & Oncol, Lackland AFB, TX 78236 USA. Lackland AFB, Wilford Hall Med Ctr, San Antonio, TX USA. RP Ornstein, DL (reprint author), Univ Vermont, Coll Med, Hematol Oncol Unit, Burlington, VT 05401 USA. NR 143 TC 10 Z9 10 U1 0 U2 0 PU THIEME MEDICAL PUBL INC PI NEW YORK PA 333 SEVENTH AVE, NEW YORK, NY 10001 USA SN 0094-6176 J9 SEMIN THROMB HEMOST JI Semin. Thromb. Hemost. PD JUN PY 2003 VL 29 IS 3 BP 259 EP 274 PG 16 WC Hematology; Peripheral Vascular Disease SC Hematology; Cardiovascular System & Cardiology GA 695TD UT WOS:000183845700004 PM 12888930 ER PT J AU Luo, B Ren, F Allums, KK Gila, BP Onstine, AH Abernathy, CR Pearton, SJ Dwivedi, R Fogarty, TN Wilkins, R Fitch, RC Gillespie, JK Jenkins, TJ Dettmer, R Sewell, J Via, GD Crespo, A Baca, AG Shul, RJ AF Luo, B Ren, F Allums, KK Gila, BP Onstine, AH Abernathy, CR Pearton, SJ Dwivedi, R Fogarty, TN Wilkins, R Fitch, RC Gillespie, JK Jenkins, TJ Dettmer, R Sewell, J Via, GD Crespo, A Baca, AG Shul, RJ TI Proton irradiation of MgO- or SC2O3 passivated AlGaN/GaN high electron mobility transistors SO SOLID-STATE ELECTRONICS LA English DT Article ID FIELD-EFFECT-TRANSISTORS; OXIDE-SEMICONDUCTOR DIODES; SURFACE PASSIVATION; GATE DIELECTRICS; PERFORMANCE; HEMTS; DC; BEHAVIOR; SIGNAL; HFETS AB AlGaN/GaN high electron mobility transistors with either MgO or Sc2O3 surface passivation were irradiated with 40 MeV protons at a dose of 5 x 10(9) cm(-2). While both forward and reverse bias current were decreased in the devices as a result of decreases in channel doping and introduction of generation-recombination centers, there was no significant change observed in gate lag measurements. By sharp contrast, unpassivated devices showed significant decreases in drain current under pulsed conditions for the same proton dose. These results show the effectiveness of the oxide passivation in mitigating the effects of surface states present in the as-grown structures and also of surface traps created by the proton irradiation. (C) 2003 Published by Elsevier Science Ltd. C1 Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA. Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA. Prairie View A&M Univ, Ctr Appl Radiat Res, Prairie View, TX 77446 USA. USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Ren, F (reprint author), Univ Florida, Dept Chem Engn, POB 116005, Gainesville, FL 32611 USA. NR 33 TC 21 Z9 21 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0038-1101 J9 SOLID STATE ELECTRON JI Solid-State Electron. PD JUN PY 2003 VL 47 IS 6 BP 1015 EP 1020 DI 10.1016/S0038-1101(02)00468-9 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied; Physics, Condensed Matter SC Engineering; Physics GA 668EM UT WOS:000182277400012 ER PT J AU Bolia, RS Slyh, RE AF Bolia, RS Slyh, RE TI Perception of stress and speaking style for selected elements of the SUSAS database SO SPEECH COMMUNICATION LA English DT Article DE SUSAS; stressed speech; speech perception; speech recognition ID SPEECH AB The Speech Under Simulated and Actual Stress (SUSAS) database is a collection of utterances recorded under conditions of simulated or actual stress, the purpose of which is to allow researchers to study the effects of stress and speaking style on the speech waveform. The aim of the present investigation was to assess the perceptual validity of the simulated portion of the database by determining the extent to which listeners classify its utterances according to their assigned labels. Seven listeners performed an eight-alternative, forced-choice response, judging whether monosyllabic or disyllabic words spoken by talkers from three different regional accent classes (Boston, General American, New York) were best classified as, clear, fast, loud, neutral, question, slow, or soft. Mean percentages of "correct" judgments were analysed using a 3 (regional accent class) x 2 (number of syllables) x 8 (speaking style) repeated measures analysis of variance. Results indicate that, overall, listeners correctly classify the utterances only 58% of the time, and that the percentage of correct classifications varies as a function of all three independent variables. (C) 2002 Elsevier Science B.V. All rights reserved. C1 USAF, Res Lab, HECP, Wright Patterson AFB, OH 45433 USA. RP USAF, Res Lab, HECP, 2255 H St, Wright Patterson AFB, OH 45433 USA. EM robert.bolia@wpafb.af.mil NR 17 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-6393 EI 1872-7182 J9 SPEECH COMMUN JI Speech Commun. PD JUN PY 2003 VL 40 IS 4 BP 493 EP 501 DI 10.1016/S0167-6393(02)00129-2 PG 9 WC Acoustics; Computer Science, Interdisciplinary Applications SC Acoustics; Computer Science GA 679ZZ UT WOS:000182953000004 ER PT J AU Merrill, EA Clewell, RA Gearhart, JM Robinson, PJ Sterner, TR Yu, KO Mattie, DR Fisher, JW AF Merrill, EA Clewell, RA Gearhart, JM Robinson, PJ Sterner, TR Yu, KO Mattie, DR Fisher, JW TI PBPK predictions of perchlorate distribution and its effect on thyroid uptake of radioiodide in the male rat SO TOXICOLOGICAL SCIENCES LA English DT Article DE perchlorate; radioiodide; thyroid; inhibition; sodium iodide symporter; PBPK; model ID IODIDE SYMPORTER GENE; GLAND; THYROTROPIN; TRANSPORT; MODEL AB Due to perchlorate's (ClO4-) ability to competitively inhibit thyroid iodide (I-) uptake through the sodium-iodide symporter (NIS), potential human health risks exist from chronic exposure via drinking water. Such risks may include hypothyroidism, goiter, and mental retardation (if exposure occurs during critical periods in neurodevelopment). To aid in predicting perchlorate's effect on normal I- kinetics, we developed a physiologically-based pharmacokinetic (PBPK) model for the adult male rat. The model structure describes simultaneous kinetics for both anions together with their interaction at the NIS, in particular, the inhibition of I- uptake by ClO4-. Subcompartments and Michaelis-Menten (M-M) kinetics were used to describe active uptake of both anions in the thyroid, stomach, and skin. Separate compartments for kidney, liver, plasma, and fat were described by passive diffusion. The model successfully predicts both (ClO4-)-Cl-36 and I-125(-) kinetics after iv doses of 3.3 mg/kg and 33 mg/kg, respectively, as well as inhibition of thyroid I-125(-) uptake by ClO4- after iv doses of ClO4- (0.01 to 3.0 mg/kg). The model also predicts serum and thyroid ClO4- concentrations from 14-day drinking water exposures (0.01 to 30.0 mg ClO4-/kg/day) and compensation of perchlorate-induced inhibition of radioiodide uptake due to upregulation of the thyroid. The model can be used to extrapolate dose metrics and correlate observed effects in perchlorate toxicity studies to other species and life stages, such as rat gestation (Clewell et al., 2003). Because the model successfully predicts perchlorate's interaction with iodide, it provides a sound basis for future incorporation of the complex hypothalamic-pituitary-thyroid feedback system. C1 Geocenters Inc, Wright Patterson AFB, OH 45433 USA. Operat Technol Corp, Dayton, OH 45432 USA. Mantech Environm Technol Inc, Dayton, OH 45437 USA. AFRL HEST, Operat Toxicol Branch, Wright Patterson AFB, OH 45433 USA. RP Merrill, EA (reprint author), Geocenters Inc, 2856 G St,Bldg 79, Wright Patterson AFB, OH 45433 USA. NR 59 TC 35 Z9 35 U1 1 U2 4 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1096-6080 J9 TOXICOL SCI JI Toxicol. Sci. PD JUN PY 2003 VL 73 IS 2 BP 256 EP 269 DI 10.1093/toxsci/kfg080 PG 14 WC Toxicology SC Toxicology GA 681MP UT WOS:000183040200006 PM 12700397 ER PT J AU Hussain, SM Frazier, JM AF Hussain, SM Frazier, JM TI Involvement of apoptosis in hydrazine induced toxicity in rat primary hepatocytes SO TOXICOLOGY IN VITRO LA English DT Article DE hydrazine; in vitro toxicity; hepatocytes; apoptosis; DNA fragmentation ID PROGRAMMED CELL-DEATH; CYTOCHROME-C; DNA FRAGMENTATION; CYTOTOXICITY; ENDONUCLEASE; ACTIVATION; EXPOSURE; PROTEINS; ABSENCE; PATHWAY AB The current study was undertaken to investigate the role of apoptosis in hydrazine induced hepatotoxicity. Hepatocytes were exposed to hydrazinium nitrate (HzN) at two doses (50 and 75 mM) for 2 h then placed in fresh HzN-free media and cultured for an additional 24 h. Post-exposure, cell viability was evaluated at several time points by lactate dehydrogenase (LDH) leakage and 3(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) reduction. Markers of apoptosis (mitochondrial membrane potential, annexin binding, DNA fragmentation, caspase activation, and cytochrome c release) were measured 24 It post-exposure. The viability data showed time dependent increase in LDH leakage at 75 mM of HzN, with only a slight increase at 50 mM. MTT reduction showed a decrease in mitochondrial activity at both doses immediately after the 2 h continous exposure. However, MTT reduction returned to normal at 50 mM while at 75 mM, MTT reduction initially recovered but then deteriorated to approximately 50% of controls at 24 h post-exposure. Based on viability data, exposure to 50 mM HzN for 2 h is a marginally toxic dose while 75 mM is a significantly toxic dose. The results for apoptosis biomarkers showed a reduction in mitochondrial membrane potential, an increase in annexin binding, an increase in total caspase activity, moderate activation of caspase-3, and release of cytochrome c. However, the appearance of DNA fragmentation in HzN exposed cells was very low compared to positive controls (cadmium and cyclosporine). The possibility that HzN induces apoptosis without the involvement of DNA fragmentation can not be ruled out. The present results, overall, suggest that apoptosis may be a contributing factor in acute HzN toxicity. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 ManTech Environm Technol Inc, Dayton, OH 45437 USA. USAF, Operat Toxicol Branch, HEST, Res Lab, Wright Patterson AFB, OH 45433 USA. RP Hussain, SM (reprint author), ManTech Environm Technol Inc, Dayton, OH 45437 USA. NR 38 TC 17 Z9 21 U1 2 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0887-2333 J9 TOXICOL IN VITRO JI Toxicol. Vitro PD JUN PY 2003 VL 17 IS 3 BP 343 EP 355 DI 10.1016/S0887-2333(03)00022-5 PG 13 WC Toxicology SC Toxicology GA 693VB UT WOS:000183738100012 PM 12781213 ER PT J AU Burke, WJ Huang, CY Valladares, CE Machuzak, JS Gentile, LC Sultan, PJ AF Burke, WJ Huang, CY Valladares, CE Machuzak, JS Gentile, LC Sultan, PJ TI Multipoint observations of equatorial plasma bubbles SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE equatorial ionosphere; irregularities; solar cycle variations ID ZONAL ELECTRIC-FIELDS; SPREAD-F; MAGNETIC STORM; JUNE 4-6; DMSP; IRREGULARITIES; SCINTILLATION; MORPHOLOGY; DRIFTS; LAYER AB This paper compares evening sector measurements by the Jicamarca unattended long-term studies of the ionosphere and atmosphere (JULIA) radar, the Ancon scintillation monitor, and plasma density sensors on Defense Meteorological Satellite Program (DMSP) satellites. During more than half of the 110 nights of JULIA operations in 1998 and 1999, backscatter was observed from plumes extending above the layer of bottomside spread F. On 98% of the nights with no plumes, the S-4 index measured at Ancon was <0.8. On &SIM;90% nights with plumes, S-4>0.8. DMSP F14 crossed the magnetic equator within 7.5&DEG; longitude of Ancon near the 2100 local time (LT) meridian on 61 nights. During 32 overpasses, DMSP detected no equatorial plasma bubbles (EPBs), and JULIA detected no plumes. DMSP encountered EPBs on only 9 of the remaining 29 nights when JULIA observed plumes. Two plumes detected by JULIA on 15 April 1999 did not coincide with nearby EPBs crossed by the two satellites on the same evening. We also compared the seasonally averaged percent of nights with S-4&GE;0.8 at Ancon with the percent of orbits in which a DMSP satellite detected EPBs. Data were accumulated between May 1994 and the first quarter of 2001. On a global scale at solar minimum, DMSP encountered very few EPBs. In years near solar maximum the two data sets were well correlated. However, there were more nights with S-4&GE;0.8 at Ancon than EPB encounters by DMSP satellites. This discrepancy reflects the effects of different sampling intervals and the fact that about a third of the plumes fail to reach the DMSP altitude. Still, a correlation coefficient of 0.88 indicates that EPB detection at 840 km is a good indicator that scintillation activity is occurring near the spacecraft's longitude at the Earth's surface. The data also suggest that bubbles are often generated in bursts rather than at nearly uniform intervals. C1 USAF, Res Lab, Space Vehicles Directorate, Bedford, MA 01731 USA. Boston Coll, Inst Sci Res, Chestnut Hill, MA 02467 USA. RP Burke, WJ (reprint author), USAF, Res Lab, Space Vehicles Directorate, Bedford, MA 01731 USA. NR 28 TC 14 Z9 14 U1 1 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD MAY 31 PY 2003 VL 108 IS A5 AR 1221 DI 10.1029/2002JA009382 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 686DA UT WOS:000183304200001 ER PT J AU Peterson, AL Cigrang, JA AF Peterson, AL Cigrang, JA TI Management of vasovagal syncope: Controlling or aborting faints by leg crossing and muscle tensing SO CIRCULATION LA English DT Letter ID BLOOD PHOBIA; 5 SESSIONS; EXPOSURE C1 Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. Wright Patterson Med Ctr, Dayton, OH USA. RP Peterson, AL (reprint author), Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. EM alan.peterson@lackland.af.mil NR 5 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0009-7322 J9 CIRCULATION JI Circulation PD MAY 27 PY 2003 VL 107 IS 20 BP E198 EP E198 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA 683TN UT WOS:000183165900038 PM 12777329 ER PT J AU Narayanan, L Buttler, GW Yu, KO Mattie, DR Fisher, JW AF Narayanan, L Buttler, GW Yu, KO Mattie, DR Fisher, JW TI Sensitive high-performance liquid chromatography method for the determination of low levels of perchlorate in biological samples SO JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES LA English DT Article DE perchlorate ID DRINKING-WATER AB A rapid and sensitive high-performance liquid chromatography (HPLC) method was developed to detect perchlorate in tissues of male and female rats, both pregnant and lactating (including milk) after administration of perchlorate. Supernatants of ethanol precipitated rat fluids and tissues were evaporated to dryness under nitrogen and reconstituted in deionized water. Reconstituted samples were injected into HPLC system coupled with conductivity detection. Isocratic separation of perchlorate was achieved using an anion-exchange column with sodium hydroxide as mobile phase and a conductivity detector. In this method, perchlorate showed a linear response range from 5 to 100 ng/ml. The lower detection limits for perchlorate in fluids and tissues of rats were 3-6 ng/ml and 0.007-0.7 mg/kg, respectively. The described method has the unique advantage over the existing methods of determining low traces of perchlorate in different biological matrices without complex sample preparation. (C) 2003 Elsevier Science B.V. All rights reserved. C1 GEO CENTERS Inc, Wright Patterson AFB, OH 45433 USA. ManTech Environm Technol Inc, Dayton, OH 45437 USA. AFRL, HEST, Wright Patterson AFB, OH 45433 USA. Univ Georgia, Atlanta, GA USA. RP Narayanan, L (reprint author), GEO CENTERS Inc, 2856 G St, Wright Patterson AFB, OH 45433 USA. NR 9 TC 30 Z9 30 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1570-0232 J9 J CHROMATOGR B JI J. Chromatogr. B PD MAY 25 PY 2003 VL 788 IS 2 BP 393 EP 399 DI 10.1016/S1570-0232(03)00037-0 PG 7 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 671WX UT WOS:000182488900020 PM 12705980 ER PT J AU Gorsse, S Miracle, DB AF Gorsse, S Miracle, DB TI Mechanical properties of Ti-6Al-4V/TiB composites with randomly oriented and aligned TiB reinforcements SO ACTA MATERIALIA LA English DT Article DE metal matrix composites; titanium alloys; powder consolidation; mechanical properties testing; elastic behavior ID TITANIUM MATRIX COMPOSITES; MICROSTRUCTURE; SOLIDIFICATION; ADDITIONS; EVOLUTION; ALLOYS AB In situ Ti-6Al-4V/TiB discontinuously reinforced composites, containing 20 and 40% of TiB whiskers by volume, were produced by blending Ti, Al/V, and TiB2 Powders. The consolidated powder blends were annealed to transform the TiB2 particles to TiB. The microstructural evolution of the composite was studied as a function of heat treatment duration at 1100, 1200, 1300 and 1400 degreesC. The mechanical properties of Ti-6Al-4V/TiB composites were established in tension and compression at room temperature and 300 degreesC, and by resonant ultrasound spectroscopy (RUS), for the two volume fractions of TiB, and for randomly oriented and aligned arrays of TiB whiskers. The average Young's modulus of the composite with 20% of randomly oriented TiB whiskers was 153 GPa, compared to 109 GPa for unreinforced Ti-6Al-4V. The average Young's modulus of composites with 20 and 40% of aligned TiB whiskers was measured along the extrusion axis as 169 and 205 GPa, respectively. The stiffness of TiB whiskers was determined from bulk measurements with the Halpin-Tsai equation to be 482 GPa. Yield and ultimate strengths near 1200 MPa were measured. The strength and ductility of the materials were limited in the present study by non-optimal matrix microstructure and inadequate particulate distribution, and approaches for properties improvements are provided. (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Systran Fed Inc, Dayton, OH 45433 USA. RP Miracle, DB (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. EM daniel.miracle@wpafb.af.mil OI Gorsse, Stephane/0000-0003-1966-8476 NR 25 TC 197 Z9 212 U1 3 U2 58 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 EI 1873-2453 J9 ACTA MATER JI Acta Mater. PD MAY 23 PY 2003 VL 51 IS 9 BP 2427 EP 2442 DI 10.1016/S1359-6454(02)00510-4 PG 16 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 679NM UT WOS:000182928900001 ER PT J AU Shaw, L Luo, H Villegas, J Miracle, D AF Shaw, L Luo, H Villegas, J Miracle, D TI Thermal stability of nanostructured Al93Fe3Cr2Ti2 alloys prepared via mechanical alloying SO ACTA MATERIALIA LA English DT Article DE mechanical alloying; aluminum alloys; grain growth; nanostructured materials ID AUSTENITIC STAINLESS-STEEL; GRAIN-GROWTH; NANOCRYSTALLINE AL; DEFORMATION; SIZE; ATTRITION; PARTICLES; BEHAVIOR; STRENGTH; KINETICS AB Thermal stability of nanostructured Al93Fe3Ti2Cr2 alloys prepared via mechanical alloying (MA) starting from elemental powders was investigated using a variety of analytical techniques including modulated differential scanning calorimetry, X-ray diffraction, scanning electron microscopy, transmission electron microscopy coupled with energy dispersive spectrometry and microdiffraction. The results showed that the MA-processed Al93Fe3Ti2Cr2 alloy in the as-milled condition was composed of an Al-based supersaturated solid solution with high internal strains. Release of internal strains, intermetallic precipitation and grain growth occurred upon heating of the MA-processed Al alloy. Nevertheless, grain growth in the MA-processed At alloy was very limited and fcc-Al grains with sizes in the range of 20 nm were still present in the alloys after exposure to 450 degreesC (0.77 T-m). (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. C1 Univ Connecticut, Dept Met & Mat Engn, Storrs, CT 06269 USA. USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. RP Shaw, L (reprint author), Univ Connecticut, Dept Met & Mat Engn, Storrs, CT 06269 USA. NR 51 TC 79 Z9 80 U1 2 U2 12 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD MAY 23 PY 2003 VL 51 IS 9 BP 2647 EP 2663 DI 10.1016/S1359-6454(03)00075-2 PG 17 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 679NM UT WOS:000182928900017 ER PT J AU Whalen, JA AF Whalen, JA TI Dependence of the equatorial anomaly and of equatorial spread F on the maximum prereversal E x B drift velocity measured at solar maximum SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE E x B drift; equatorial anomaly; equatorial spread F ID ELECTRON-CONTENT; BUBBLES; IONOSONDE; EVOLUTION; REGION; LAYER AB [1] The relation of equatorial bubbles to the equatorial anomaly is important because scintillation that is most disruptive to transionospheric RF propagation occurs when it passes through the intersection of the two. However, measurement of the relation between the two and of the electric field from which both arise is difficult because of large separations in space and time. This first attempt to perform these measurements employs a latitudinal array of ionospheric sounders spanning 0degrees to 40degrees dip latitude (DLAT) in the Western American sector. Measured on each day of a solar maximum year are the following: ( 1) the maximum electron density of the postsunset equatorial anomaly, Ne, at 16degrees and at 20.3degrees DLAT at 2100 LT, the time when the anomaly crest is at its maximum latitude; ( 2) equatorial spread F (ESF), detected by the occurrence of macroscopic bubbles and of bottomside spread F (BSSF), the latter recorded at levels of none, weak and strong; ( 3) Kp averaged over the 6 hours before sunset. Ne and ESF are considered functions of the maximum prereversal F layer drift E x B drift velocity measured by the Jicamarca incoherent scatter radar also during solar maximum and at the same longitude. Parameters are averaged over two levels of Kp for the three seasons, the E months ( March, April, September, and October), D months ( November - February), and J months ( May - August) to yield the following results: (1) Ne measured at 16degrees, at 20.3degrees DLAT or at the anomaly crest are linearly dependent on maximum E x B drift velocity. ( 2) Occurrence of each level of ESF increases with Ne approximately linearly during the E and J months but not during the D months. ( 3) ESF occurrence is dependent on and increases approximately linearly with maximum E x B drift velocity during the E and J months. During the D months this dependence is absent. Except for the D months, these results indicate that scintillation increases with maximum prereversal E x B drift velocity: at L-band at the bubble-anomaly intersection because bubble occurrence increases, Ne increases, and the latitudinal extent of the anomaly increases; and at VHF/UHF near the equator because the occurrence of strong BSSF increases. C1 USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. RP Whalen, JA (reprint author), USAF, Res Lab, Space Vehicles Directorate, 29 Randolph Rd, Hanscom AFB, MA 01731 USA. NR 20 TC 21 Z9 21 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD MAY 16 PY 2003 VL 108 IS A5 AR 1193 DI 10.1029/2002JA009755 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 682TN UT WOS:000183108600004 ER PT J AU Luo, B Mehandru, R Kim, J Ren, E Gila, BP Onstine, AH Abernathy, CR Pearton, SJ Gotthold, D Birkhahn, R Peres, B Fitch, RC Moser, N Gillespie, JK Jenkins, T Sewell, J Via, D Crespo, A AF Luo, B Mehandru, R Kim, J Ren, E Gila, BP Onstine, AH Abernathy, CR Pearton, SJ Gotthold, D Birkhahn, R Peres, B Fitch, RC Moser, N Gillespie, JK Jenkins, T Sewell, J Via, D Crespo, A TI High three-terminal breakdown voltage and output power of Sc2O3 passivated AlGaN/GaN high electron mobility transistors SO ELECTRONICS LETTERS LA English DT Article ID SURFACE PASSIVATION; HEMTS AB MBE-deposited Sc2O3 films are found to effectively passivate surface states in the gate-drain region of AlGaN/GaN HEMTs. The effect of the passivation is observed in higher forward I-DS-V-DS three-terminal breakdown voltage and output power under class A operation. In the latter case, the power-added efficiency was at least doubled. C1 Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA. Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA. EMCORE Corp, Somerset, NJ 08873 USA. USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA. RP Luo, B (reprint author), Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA. RI Gotthold, David/D-1086-2011; Kim, Jihyun/F-6940-2013 OI Gotthold, David/0000-0002-3990-6614; NR 7 TC 1 Z9 2 U1 0 U2 0 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD MAY 15 PY 2003 VL 39 IS 10 BP 809 EP 810 DI 10.1049/el:20030525 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA 687AM UT WOS:000183353700034 ER PT J AU Geist, B Peterson, T Horwath, JC Turgut, Z Huang, MQ Snyder, RA Fingers, RT AF Geist, B Peterson, T Horwath, JC Turgut, Z Huang, MQ Snyder, RA Fingers, RT TI Effect of high-temperature aging on electrical properties of Hiperco (R) 27, Hiperco (R) 50, and Hiperco (R) 50 HS alloys SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 47th Annual Conference on Magnetism and Magnetic Materials CY NOV 11-15, 2002 CL TAMPA, FLORIDA SP Amer Inst Phys, IEEE Magnet Soc, Amer Ceram Soc, US Off Naval Res, Amer Phys Soc, Amer Soc Testing & Mat, Minerals, Met & Mat Soc AB Some more electric aircraft concepts require soft magnetic FeCo materials to be stable at temperatures as high as 773 K for long periods of time. At this high operating temperature, aging related processes may occur that result in changes in material properties. The material supplier typically specifies only room-temperature properties, and only limited reports are available on properties at elevated temperatures. The change in properties as a function of time at 773 K will give information on the lifetime of the material to assist designers when selecting materials for high-temperature applications. We have conducted a study on the effects of long-term aging on the magnetic, mechanical, and electrical properties of Hiperco(R) 27, Hiperco(R) 50, and Hiperco(R) 50 HS FeCo soft magnetic alloys. Samples of each material were aged in argon for 100, 1000, 2000, and 5000 h at 773 K. Here, we report the changes in electrical resistivity after aging. Of the three alloys, high-temperature aging has the greatest effect on the resistivity of Hiperco(R) 50. The electrical resistivities for each sample are compared and conclusions are drawn on the relative thermal stability of each alloy. The changes in electrical resistivities for each alloy are also related to changes in other properties, such as total power loss and coercivity, that were observed during this study on aging. (C) 2003 American Institute of Physics. C1 AFRL, Wright Patterson AFB, OH 45433 USA. Universal Energy Syst Inc, Dayton, OH 45432 USA. RP Geist, B (reprint author), AFRL, Wright Patterson AFB, OH 45433 USA. RI Geist, Brian/J-4287-2014 OI Geist, Brian/0000-0002-6091-1629 NR 6 TC 5 Z9 5 U1 1 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2003 VL 93 IS 10 BP 6686 EP 6688 DI 10.1063/1.1556104 PN 2 PG 3 WC Physics, Applied SC Physics GA 677RX UT WOS:000182822300087 ER PT J AU Turgut, Z Horwath, JC Huang, MQ Fingers, RT AF Turgut, Z Horwath, JC Huang, MQ Fingers, RT TI Magnetic properties of FeCo laminates subjected to axial loading SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 47th Annual Conference on Magnetism and Magnetic Materials CY NOV 11-15, 2002 CL TAMPA, FLORIDA SP Amer Inst Phys, IEEE Magnet Soc, Amer Ceram Soc, US Off Naval Res, Amer Phys Soc, Amer Soc Testing & Mat, Minerals, Met & Mat Soc AB While manufacturing the stator/rotor assemblies of the aircraft power components, increased power losses are typically pronounced due to an imposed axial load onto the stack of magnetic laminates to increase the rigidity of the stack. An axial loader to enable core loss measurements to be made while the laminate stack is subjected to an axial load has been designed. The apparatus and multilayered slotted interface plates, allowing for the toroidal windings and simultaneous load application were used to evaluate the effect of compression up to 27.5 MPa on magnetic properties of commercially available Fe-Co based Hiperco(R) 50, Hiperco(R) 50 HS, and Hiperco(R) 27 alloys. For each composition, we tested two sets of samples: (1) completely insulated and (2) uninsulated. We report the increased losses due to an axial load and discuss the origin of these increased losses in terms of constant size anisotropy for completely insulated laminates. (C) 2003 American Institute of Physics. C1 Universal Energy Syst Inc, Dayton, OH 45432 USA. AFRL, Wright Patterson AFB, OH 45433 USA. RP Turgut, Z (reprint author), Universal Energy Syst Inc, Dayton Xenia Rd, Dayton, OH 45432 USA. NR 5 TC 4 Z9 4 U1 2 U2 6 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 15 PY 2003 VL 93 IS 10 BP 6692 EP 6694 DI 10.1063/1.1556106 PN 2 PG 3 WC Physics, Applied SC Physics GA 677RX UT WOS:000182822300089 ER PT J AU Liu, S Bauser, S Turgut, Z Coate, J Fingers, RT AF Liu, S Bauser, S Turgut, Z Coate, J Fingers, RT TI Fe-Co-V alloy with improved magnetic properties and high-temperature creep resistance SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 47th Annual Conference on Magnetism and Magnetic Materials CY NOV 11-15, 2002 CL TAMPA, FLORIDA SP Amer Inst Phys, IEEE Magnet Soc, Amer Ceram Soc, US Off Naval Res, Amer Phys Soc, Amer Soc Testing & Mat, Minerals, Met & Mat Soc AB Advanced power systems require soft magnetic materials with a combination of high saturation magnetization and high creep resistance. When the Fe-Co-V alloy laminate is used in a rotor at high temperatures (500-600degreesC) coupled with very high rpm, significant creep occurs, which destroys the device integrity. Since grain boundary slide is predominantly responsible for creep deformation in the Fe-Co-V alloy at temperature higher than similar to430degreesC, the approach in this study was to reduce the volume fraction of the grain boundaries by making a Fe-Co-V alloy with very large grains. Very large grains, up to mm range, were readily obtained after small cold deformation of similar to3% followed by a normal recrystallization anneal. Fe-Co-V alloy with large grains displays lower coercivity and higher permeability than the commercial Fe-Co-V alloy. Even though its yield strength at 600degreesC is lower than the commercial Fe-Co-V, the creep strains of the Fe-Co-V alloy with large grains are only 1/10-1/2 of that for the commercial alloy in the initial and middle periods of the creep test performed at 600degreesC under 150 MPa. At the end of the test before the specimens were broken, the Fe-Co-V alloy with large grains showed an accelerated creep strain rate. Better balancing the high-temperature yield strength and creep resistance by creating the optimum grain size would further improve the high-temperature creep resistance of the Fe-Co-V alloy. (C) 2003 American Institute of Physics. C1 Univ Dayton, Magnet Lab, Dayton, OH 45469 USA. Universal Energy Syst Inc, Dayton, OH 45432 USA. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. RP Liu, S (reprint author), Univ Dayton, Magnet Lab, 300 Coll Pk, Dayton, OH 45469 USA. NR 5 TC 3 Z9 3 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2003 VL 93 IS 10 BP 7118 EP 7120 DI 10.1063/1.1555335 PN 2 PG 3 WC Physics, Applied SC Physics GA 677RX UT WOS:000182822300231 ER PT J AU Huang, MQ Turqut, Z Chu, SY Horwath, JC Fingers, RT Smith, BR Chen, ZM Ma, BM AF Huang, MQ Turqut, Z Chu, SY Horwath, JC Fingers, RT Smith, BR Chen, ZM Ma, BM TI Structure and magnetic properties of Sm(Co1-xZrx)(y) alloys (x=0.03-0.05,y=12-15) and melt-spun Sm(Co,Fe,Zr,Cu,Ga,B)(12) material SO JOURNAL OF APPLIED PHYSICS LA English DT Article AB Alloys with nominal compositions of Sm(Co1-xZrx)(y) (x=0.03-0.05, y=12-15) were synthesized by arc melting and characterized in the temperature range of 10-1473 K and with a magnetic field up to 5 T. Near-single-phase materials with Th2Ni17 structure were formed in the as-cast alloys with x=0.05. Similar to Ti, Zr also stabilizes the Th2Ni17 structure. Hard magnetic properties with T(c)similar to1142-1179 K, M(s)similar to110-123 emu/g, and H(a)similar to63-86 kOe at 300 K have been observed. An alloy with a nominal composition of Sm(Co0.75Fe0.1Zr0.05Cu0.08Ga0.01B0.01)(12) was also prepared by melt spinning. The melt spun materials were nanostructured in nature and magnetically hard in the as-spun states. H(ci)similar to10 kOe, B(s)similar to9.5 kG, and H(ci)similar to27 kOe, B(s)similar to9.8 kG were obtained at 300 and 10 K, respectively. The effects of the heat treatment conditions on magnetic properties of both alloys and ribbon will be also discussed. (C) 2003 American Institute of Physics. C1 Universal Energy Syst Inc, Dayton, OH 45432 USA. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. Magnequench Technol Ctr, Res Triangle Pk, NC 27709 USA. RP Huang, MQ (reprint author), Universal Energy Syst Inc, 4401 Dayton Xenia Rd, Dayton, OH 45432 USA. NR 8 TC 6 Z9 6 U1 2 U2 3 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 15 PY 2003 VL 93 IS 10 BP 7972 EP 7974 DI 10.1063/1.1541645 PN 3 PG 3 WC Physics, Applied SC Physics GA 677TA UT WOS:000182822600111 ER PT J AU Chu, SY Majetich, SA Huang, MQ Fingers, RT AF Chu, SY Majetich, SA Huang, MQ Fingers, RT TI Synthesis and magnetic behavior of SmCo5(1-x)Fex nanocomposite magnets SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID AMORPHOUS IRON AB SmCo5(1-x)Fex (x=0.2, 0.4, 0.6, and 0.7) nanocomposites were synthesized by ball milling a mixture of SmCo5 and nanosize iron powders. Composites were made using different kinds of soft ferromagnetic phase nanoparticles, either alpha-Fe crystallized from amorphous iron generated by sonochemical decomposition of Fe(CO)(5), or acicular metallic iron particles with an average length of 200 nm and average diameter of 18 nm. After milling the powder mixtures were compacted by hot isostatic pressing at 3000 psi for similar to5 min at a temperature of 530-570 degreesC. The compacted solids were magnetically characterized between 5 and 300 K. Hysteresis loop measurements and recoil measurements for the (SmCo5)(0.8)/acicular-Fe-0.2 composite show stronger magnetic coupling when compared with the properties of (SmCo5)(0.8)/amorphous-Fe-0.2, am-Fe coated SmCo5, and pure SmCo5 powders alone. (C) 2003 American Institute of Physics. C1 Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Universal Energy Syst Inc, Dayton, OH 45432 USA. AFRL, Wright Patterson AFB, OH 45433 USA. RP Chu, SY (reprint author), Carnegie Mellon Univ, 5000 Forbes Ave, Pittsburgh, PA 15213 USA. RI Majetich, Sara/B-1022-2015 OI Majetich, Sara/0000-0003-0848-9317 NR 14 TC 17 Z9 18 U1 0 U2 15 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 15 PY 2003 VL 93 IS 10 BP 8146 EP 8148 DI 10.1063/1.1544511 PN 3 PG 3 WC Physics, Applied SC Physics GA 677TA UT WOS:000182822600169 ER PT J AU Inan, US Bell, TF Bortnik, J Albert, JM AF Inan, US Bell, TF Bortnik, J Albert, JM TI Controlled precipitation of radiation belt electrons SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE electron precipitation; radiation belts; VLF transmitters; wave-particle interactions; pitch angle scattering; cyclotron resonance ID MAGNETOSPHERICALLY REFLECTED WHISTLERS; PITCH-ANGLE DIFFUSION; MAGNETIC-FIELD; WAVE; GYRORESONANCE; PLASMASPHERE; SPACECRAFT; INJECTION; COHERENT; SIGNALS AB [1] First-order estimates indicate that the lifetime of energetic ( a few MeV) electrons in the inner radiation belts ( e. g., near L = 2) may be significantly reduced by in situ injection of whistler mode waves at radiated power levels of a few kW at frequencies of a few kHz. Our estimates are based on previously published results concerning the effect on the electron lifetimes of VLF signals from ground-based VLF transmitters operating in the 17 - 23 kHz range. Waves at lower frequencies ( a few kHz) can drive diffusion rates that are higher by a factor of as much as similar to30 and can also be efficiently stored in the magnetospheric cavity, resulting in additional effective enhancement of wave power density of a factor of similar to16. This wave power enhancement is also expected to enhance the MeV electron diffusion rates. C1 Stanford Univ, STAR Lab, Stanford, CA 94305 USA. Boston Coll, Inst Sci Res, Chestnut Hill, MA 02467 USA. USAF, Res Lab, Hanscom AFB, MA USA. RP Inan, US (reprint author), Stanford Univ, STAR Lab, Stanford, CA 94305 USA. NR 35 TC 56 Z9 56 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD MAY 15 PY 2003 VL 108 IS A5 AR 1186 DI 10.1029/2002JA009580 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 682TM UT WOS:000183108500001 ER PT J AU Nishitani, N Papitashvili, VO Ogawa, T Sato, N Yamagishi, H Yukimatu, AS Rich, FJ AF Nishitani, N Papitashvili, VO Ogawa, T Sato, N Yamagishi, H Yukimatu, AS Rich, FJ TI Interhemispheric asymmetry of the high-latitude ionospheric convection on 11-12 May 1999 SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE high-latitude ionospheric convection; tenuous solar wind; Syowa SuperDARN radars; DSMP driftmeter; dipolar magnetic field lines; interhemispheric asymmetry ID INTERPLANETARY MAGNETIC-FIELD; SOLAR-WIND; RADAR OBSERVATIONS; ELECTRIC-FIELDS; PATTERNS; REGIONS; MODELS; EVENT AB [1] Ionospheric convection over the southern polar cap on 11 - 12 May 1999 has been studied by using the Syowa East and South HF radar data and the DMSP ion driftmeter data, when the solar wind density was very low and geomagnetic activity was low. The overall convection pattern is consistent with the previous results by Ohtani et al. [ 2000]. However, the Syowa radars and the DMSP satellites observed very high (> 1500 m/s) westward plasma flows at dusk directed from the nightside toward the dayside only in the Southern ( dark) Hemisphere. The high-speed flow was observed continuously across the fields of view of both radars from 1530 UT on 11 May to 0200 UT on 12 May, when the solar wind density was close to minimum. Comparison with the DMSP particle and auroral image data shows that the westward flow regions were located in the middle of the auroral precipitation area. The strong asymmetry of the convection between the two hemispheres indicates the importance of the presence ( absence) of solar illumination for the absence ( presence) of the strong and localized ionospheric flows. C1 Nagoya Univ, Solar Terr Environm Lab, Aichi 4428507, Japan. Univ Michigan, SPRL, Ann Arbor, MI 48109 USA. Natl Inst Polar Res, Itabashi Ku, Tokyo 1738515, Japan. USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. RP Nishitani, N (reprint author), Nagoya Univ, Solar Terr Environm Lab, Aichi 4428507, Japan. NR 25 TC 4 Z9 4 U1 1 U2 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD MAY 15 PY 2003 VL 108 IS A5 AR 1184 DI 10.1029/2002JA009680 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 682TM UT WOS:000183108500003 ER PT J AU Baldwin, RO Davis, NJ Midkiff, SF Kobza, JE AF Baldwin, RO Davis, NJ Midkiff, SF Kobza, JE TI Queueing network analysis: concepts, terminology, and methods SO JOURNAL OF SYSTEMS AND SOFTWARE LA English DT Article DE queueing theory; performance evaluation; network models (deterministic) ID EXPONENTIAL SERVERS; BATCH MOVEMENT; SYSTEMS; CUSTOMERS AB Queueing network analysis can be a valuable tool to analyze network models. However, the vast number and diverse nature of the tools available to analyze a problem can often leave the uninitiated frustrated or bewildered-awash in concepts, terminology, and methods not encountered elsewhere. As a primer for queueing network analysis, this paper emphasizes essential concepts and terminology. Selection of analytical methods based on the type of queueing network is discussed. Analytical methods are demonstrated using numerous examples and references for further study into advanced analysis are included throughout. (C) 2002 Elsevier Science Inc. All rights reserved. C1 USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA. Virginia Tech, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061 USA. Texas Tech Univ, Dept Ind Engn, Lubbock, TX 79409 USA. EM rusty.baldwin@afit.edu; nda-vis@vt.edu; midkiff@vt.edu; john.ko-bza@coe.ttu.edu OI Kobza, John/0000-0003-4709-8255; Midkiff, Scott/0000-0003-4933-7360 NR 43 TC 12 Z9 12 U1 1 U2 2 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0164-1212 EI 1873-1228 J9 J SYST SOFTWARE JI J. Syst. Softw. PD MAY 15 PY 2003 VL 66 IS 2 BP 99 EP 117 DI 10.1016/S0164-1212(02)00068-7 PG 19 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA 690UJ UT WOS:000183568100002 ER PT J AU Apostolova, T Huang, D Cardimona, DA AF Apostolova, T Huang, D Cardimona, DA TI Photon-absorption-induced intersubband optical-phonon scattering of electrons in quantum wells SO PHYSICAL REVIEW B LA English DT Article ID TRANSPORT; SEMICONDUCTOR; TEMPERATURE; FIELD AB In the presence of a normally incident intense mid-IR pulsed laser field, both photon-absorption-induced intrasubband and intersubband phonon-scattering of electrons are found by including the photon-assisted phonon-scattering process in a Boltzmann equation for phonon energies that are smaller than the energy separation between two electron subbands in a quantum well. The ultrafast dynamics of the electron distributions for different subbands is studied with various lattice temperatures, photon energies, field strengths, and quantum-well widths. Upward steps found in the differences between the electron distributions with/without the photon-assisted process are attributed to either photon-absorption-induced phonon scattering of electrons via intrasubband transitions or the photon-absorption-induced phonon scattering of electrons via intersubband transitions in quantum wells. The photon-absorption-induced phonon absorption by intersubband transitions of electrons from the first to the second subband is a unique feature in quantum-well systems and is found to have a significant effect on the electron populations in both subbands. C1 USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA. RP Apostolova, T (reprint author), USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA. NR 19 TC 2 Z9 2 U1 1 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD MAY 15 PY 2003 VL 67 IS 20 AR 205323 DI 10.1103/PhysRevB.67.205323 PG 8 WC Physics, Condensed Matter SC Physics GA 689GL UT WOS:000183483200064 ER PT J AU Escolas, SM Kendall, AP Santiago, S Holland, D Russo, MB AF Escolas, SM Kendall, AP Santiago, S Holland, D Russo, MB TI Sleep deprivation impacts air refueling instructor pilots differently based on simulator experience SO SLEEP LA English DT Meeting Abstract CT 17th Annual Meeting of the Associated-Professional-Sleep-Societies CY JUN 03-08, 2003 CL CHICAGO, ILLINOIS SP Assoc Prof Sleep Soc C1 Walter Reed Army Inst Res, Washington, DC USA. USAF, Off Sci Res, Navy Test Pilot Sch, Washington, DC USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ACADEMY SLEEP MEDICINE PI WESTCHESTER PA ONE WESTBROOK CORPORATE CENTER STE 920, WESTCHESTER, IL 60154 USA SN 0161-8105 J9 SLEEP JI Sleep PD MAY 15 PY 2003 VL 26 BP A195 EP A195 PG 1 WC Clinical Neurology; Neurosciences SC Neurosciences & Neurology GA 677ZY UT WOS:000182841100484 ER PT J AU Escolas, SM Kendall, AP Santiago, S Holland, D Russo, MB AF Escolas, SM Kendall, AP Santiago, S Holland, D Russo, MB TI Intervening variables influence the impact of extended wafefulness on air refueling performance SO SLEEP LA English DT Meeting Abstract CT 17th Annual Meeting of the Associated-Professional-Sleep-Societies CY JUN 03-08, 2003 CL CHICAGO, ILLINOIS SP Assoc Prof Sleep Soc C1 Walter Reed Army Inst Res, Washington, DC USA. USAF, Off Sci Res, Navy Test Pilot Sch, Washington, DC USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ACADEMY SLEEP MEDICINE PI WESTCHESTER PA ONE WESTBROOK CORPORATE CENTER STE 920, WESTCHESTER, IL 60154 USA SN 0161-8105 J9 SLEEP JI Sleep PD MAY 15 PY 2003 VL 26 BP A193 EP A193 PG 1 WC Clinical Neurology; Neurosciences SC Neurosciences & Neurology GA 677ZY UT WOS:000182841100479 ER PT J AU Miller, JC Cardenas, R Vega, LR Hickey, PA Michel, AM Brown, L Dyche, J Carr, W AF Miller, JC Cardenas, R Vega, LR Hickey, PA Michel, AM Brown, L Dyche, J Carr, W TI Effects of three watchstanding schedules on submariner sleep physiology SO SLEEP LA English DT Meeting Abstract CT 17th Annual Meeting of the Associated-Professional-Sleep-Societies CY JUN 03-08, 2003 CL CHICAGO, ILLINOIS SP Assoc Prof Sleep Soc C1 USAF, Res Lab, San Antonio, TX USA. NTI Inc, San Antonio, TX USA. Veridian Engn, San Antonio, TX USA. USN, Submarine Med Res Lab, Groton, CT USA. USN, Hlth Res Ctr, San Diego, CA 92152 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ACADEMY SLEEP MEDICINE PI WESTCHESTER PA ONE WESTBROOK CORPORATE CENTER STE 920, WESTCHESTER, IL 60154 USA SN 0161-8105 J9 SLEEP JI Sleep PD MAY 15 PY 2003 VL 26 BP A424 EP A424 PG 1 WC Clinical Neurology; Neurosciences SC Neurosciences & Neurology GA 677ZY UT WOS:000182841101069 ER PT J AU Russo, MB Escolas, S Santiago, S Sing, H Holland, D Kendall, A Hall, S AF Russo, MB Escolas, S Santiago, S Sing, H Holland, D Kendall, A Hall, S TI Visual neglect in 26 hours of continuous wakefulness demonstrates patterns consistent with prefrontal and biparietal brain impairment SO SLEEP LA English DT Meeting Abstract CT 17th Annual Meeting of the Associated-Professional-Sleep-Societies CY JUN 03-08, 2003 CL CHICAGO, ILLINOIS SP Assoc Prof Sleep Soc C1 Walter Reed Army Inst Res, Washington, DC USA. USAF, Off Sci Res, Washington, DC USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ACADEMY SLEEP MEDICINE PI WESTCHESTER PA ONE WESTBROOK CORPORATE CENTER STE 920, WESTCHESTER, IL 60154 USA SN 0161-8105 J9 SLEEP JI Sleep PD MAY 15 PY 2003 VL 26 BP A172 EP A172 PG 1 WC Clinical Neurology; Neurosciences SC Neurosciences & Neurology GA 677ZY UT WOS:000182841100427 ER PT J AU Kraemer, KE Jackson, JM Kassis, M Deutsch, LK Hora, JL Simon, R Hoffmann, WF Fazio, GG Dayal, A Bania, TM Clemens, DP Heyer, MH AF Kraemer, KE Jackson, JM Kassis, M Deutsch, LK Hora, JL Simon, R Hoffmann, WF Fazio, GG Dayal, A Bania, TM Clemens, DP Heyer, MH TI Five star-forming cores in the Galactic Ring Survey: A mid-infrared study SO ASTROPHYSICAL JOURNAL LA English DT Article DE infrared : ISM; stars : formation ID H-II REGIONS; YOUNG MASSIVE STARS; VLA OBSERVATIONS; ISOGAL SURVEY; ARRAY CAMERA; NGC 6334; DUST; ABSORPTION; EMISSION; CLUSTER AB We have imaged five dense molecular cores, selected from the Galactic Ring Survey (GRS), in the mid-infrared with the MIRAC3 instrument. We obtained high spatial resolution (similar to1") images through narrow-band filters at 12.5 and 20.6 mum. Four of the five cores show multiple compact sources, extended structure, or both. Lower resolution observations by the Infrared Space Observatory (ISO) and the Midcourse Space Experiment (MSX) suggest that the fifth core is also surrounded by extended emission on large scales (greater than or similar to2'). The extended mid-infrared structure is well-correlated with the radio continuum morphology in each of the five cores. This similarity suggests that the hot dust traced by the mid-infrared is located within the H II region, traced by the radio continuum, and not merely in a surrounding photodissociation region or molecular cloud. If a single exciting source is assumed for each core, estimates of the zero-age main-sequence spectral types based on the infrared luminosities are typically 1-2 spectral types earlier than those based on the radio free-free emission. However, allowing for multiple exciting sources and apportioning the far-infrared and radio fluxes to the component sources according to the mid-infrared flux distribution produces better agreement between the derived spectral types, with an average difference of less than half a spectral type. C1 USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. Boston Univ, Inst Astrophys Res, Boston, MA 02215 USA. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. IPAC JPL, Pasadena, CA 91125 USA. Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA. RP USAF, Res Lab, Space Vehicles Directorate, 29 Randolph Rd, Hanscom AFB, MA 01731 USA. EM kathleen.kraemer@hanscom.af.mil; jackson@bu.edu; mkassis@bu.edu; deutschl@bu.edu; jhora@cfa.harvard.edu; simonr@chub.bu.edu; whoffmann@as.arizona.edu; gfazio@cfa.harvard.edu; adayal@ipac.caltech.edu; bania@bu.edu; clemens@bu.edu; heyer@astro.umass.edu RI Bania, Thomas/H-2318-2014; OI Hora, Joseph/0000-0002-5599-4650; Kraemer, Kathleen/0000-0002-2626-7155 NR 48 TC 13 Z9 13 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD MAY 10 PY 2003 VL 588 IS 2 BP 918 EP 930 DI 10.1086/374264 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 680RV UT WOS:000182991900024 ER PT J AU Dogan, S Teke, A Huang, D Morkoc, H Roberts, CB Parish, J Ganguly, B Smith, M Myers, RE Saddow, SE AF Dogan, S Teke, A Huang, D Morkoc, H Roberts, CB Parish, J Ganguly, B Smith, M Myers, RE Saddow, SE TI 4H-SiC photoconductive switching devices for use in high-power applications SO APPLIED PHYSICS LETTERS LA English DT Article AB Silicon carbide is a wide-band-gap semiconductor suitable for high-power high-voltage devices and it has excellent properties for use in photoconductive semiconductor switches (PCSSs). PCSS were fabricated as planar structures on high-resistivity 4H-SiC and tested at dc bias voltages up to 1000 V. The typical maximum photocurrent of the device at 1000 V was about 49.4 A. The average on-state resistance and the ratio of on-state to off-state currents were about 20 Omega and 3x10(11), respectively. Photoconductivity pulse widths for all applied voltages were 8-10 ns. These excellent results are due in part to the removal of the surface damage by high-temperature H-2 etching and surface preparation. Atomic force microscopy images revealed that very good surface morphology, atomic layer flatness, and large step width were achieved. (C) 2003 American Institute of Physics. C1 Virginia Commonwealth Univ, Dept Elect Engn, Richmond, VA 23284 USA. Ltd Liabil Corp, Tech Explore, Oxford, OH 45056 USA. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. Elect Engn Univ S Florida, Tampa, FL 33543 USA. Ataturk Univ, Fac Arts & Sci, Dept Phys, TR-25240 Erzurum, Turkey. Balikesir Univ, Fac Arts & Sci, Dept Phys, TR-10100 Balikesir, Turkey. RP Dogan, S (reprint author), Virginia Commonwealth Univ, Dept Elect Engn, 601 W Main St, Richmond, VA 23284 USA. RI Dogan, Seydi/F-8445-2016 NR 16 TC 42 Z9 52 U1 2 U2 24 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 5 PY 2003 VL 82 IS 18 BP 3107 EP 3109 DI 10.1063/1.1571667 PG 3 WC Physics, Applied SC Physics GA 673FR UT WOS:000182570000057 ER PT J AU Carlton, GN AF Carlton, GN TI The impact of a change to inhalable occupational exposure limits: Strontium chromate exposure in the US Air Force SO AIHA JOURNAL LA English DT Article DE hexavalent chromium; inhalable aerosol sampler; priming; sanding; strontium chromate ID TOTAL AEROSOL; TOTAL DUST; SAMPLER; TLVS(R); WORKERS AB The American Conference of Governmental Industrial Hygienists has announced its intention to replace all total particulate threshold limit values (TLVs(R)) with size-selective TLVs. Because the U.S. Air Force has adopted the TLVs as its occupational exposure limits, the impact of this change is of interest, specifically for hexavalent chromium. This article reviews historical strontium chromate sampling data in the Air Force and the impact of its reinterpretation in comparison to an inhalable TLV. Based on the measured conversion factor between the 37-mm cassette and the IOM inhalable sampler, inhalable strontium chromate exposures will continue to exceed the TLV during all aircraft priming and most sanding procedures. In addition, inhalable exposures are expected to exceed 1000 times the TLV, greater than the highest currently assigned protection factor for airline respirators, during 25% of priming procedures. Without a change in the value of the current TLV time-weighted average of 0.5 mug/m(3), the Air Force will need to reduce strontium chromate levels, either by incorporating work practices that decrease worker productivity or considering a change to nonchromated primers. C1 72nd Med Grp, Tinker AFB, OK 73145 USA. RP Carlton, GN (reprint author), 72nd Med Grp, Tinker AFB, OK 73145 USA. NR 41 TC 3 Z9 3 U1 0 U2 1 PU AMER INDUSTRIAL HYGIENE ASSOC PI FAIRFAX PA 2700 PROSPERITY AVE #250, FAIRFAX, VA 22031-4307 USA SN 1529-8663 J9 AIHA J JI AIHA J. PD MAY-JUN PY 2003 VL 64 IS 3 BP 306 EP 311 DI 10.1080/15428110308984821 PG 6 WC Environmental Sciences; Public, Environmental & Occupational Health SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health GA 688BT UT WOS:000183413000002 PM 12809535 ER PT J AU Mulroy, JF De Jong, MJ AF Mulroy, JF De Jong, MJ TI Syndromes of hypercoagulability SO AMERICAN JOURNAL OF NURSING LA English DT Article ID PROTEIN-C; THROMBOSIS; DEFICIENCIES C1 Baptist Mem Hosp, ICU, Collierville, TN USA. USAF, Washington, DC 20330 USA. Univ Kentucky, Lexington, KY USA. NR 21 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0002-936X J9 AM J NURS JI Am. J. Nurs. PD MAY PY 2003 VL 103 IS 5 BP 64KK EP + PG 4 WC Nursing SC Nursing GA 676YU UT WOS:000182780800032 ER PT J AU Ly, JQ Carlson, CL LaGatta, LM Beall, DP AF Ly, JQ Carlson, CL LaGatta, LM Beall, DP TI Giant cell tumor of the peroneus tendon sheath SO AMERICAN JOURNAL OF ROENTGENOLOGY LA English DT Article C1 Wilford Hall USAF Med Ctr, Dept Radiol, Lackland AFB, TX 78236 USA. Brooke Army Med Ctr, Dept Radiol, Ft Sam Houston, TX 78234 USA. Wilford Hall USAF Med Ctr, Dept Pathol, Lackland AFB, TX 78236 USA. Uniformed Serv Univ Hlth Sci, Dept Radiol, Bethesda, MD 20814 USA. RP Ly, JQ (reprint author), Wilford Hall USAF Med Ctr, Dept Radiol, 2200 Bergquist Dr,Ste 1, Lackland AFB, TX 78236 USA. NR 4 TC 6 Z9 6 U1 0 U2 0 PU AMER ROENTGEN RAY SOC PI RESTON PA 1891 PRESTON WHITE DR, SUBSCRIPTION FULFILLMENT, RESTON, VA 22091 USA SN 0361-803X J9 AM J ROENTGENOL JI Am. J. Roentgenol. PD MAY PY 2003 VL 180 IS 5 BP 1442 EP 1442 PG 1 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 670RU UT WOS:000182423300041 PM 12704065 ER PT J AU Peterson, AL Hryshko-Mullen, AS Cortez, Y AF Peterson, AL Hryshko-Mullen, AS Cortez, Y TI Assessment and diagnosis of nicotine dependence in mental health settings SO AMERICAN JOURNAL ON ADDICTIONS LA English DT Article ID CIGARETTE-SMOKING; QUIT SMOKING; DEPRESSIVE SYMPTOMS; TOBACCO USE; CESSATION; ILLNESS; SMOKERS AB This study evaluated the frequency of documented assessment of smoking status and the diagnosis of nicotine dependence in a random sample of 153 mental health records and 152 medical records. The results indicated that tobacco use was routinely documented in the mental health records (88%) and medical records (87%). However, a diagnosis of nicotine dependence was given in only 2% of the mental health records (1/49) and 7% of the medical records (2/30) for those patients with documented regular tobacco use. These results suggest that clinicians do not routinely diagnose Nicotine Dependence even when diagnostic criteria are met. C1 Wilford Hall USAF Med Ctr, Dept Psychol, Clin Hlth Psychol Serv, San Antonio, TX 78236 USA. RP Peterson, AL (reprint author), Wilford Hall USAF Med Ctr, Dept Psychol, Clin Hlth Psychol Serv, 59 MDOS-MMCP,2200 Bergquist Dr,Suite 1, San Antonio, TX 78236 USA. NR 28 TC 11 Z9 11 U1 1 U2 1 PU BRUNNER-ROUTLEDGE PI PHILADELPHIA PA 325 CHESTNUT ST, 8TH FL, PHILADELPHIA, PA 19106 USA SN 1055-0496 J9 AM J ADDICTION JI Am. J. Addict. PD MAY-JUN PY 2003 VL 12 IS 3 BP 192 EP 197 DI 10.1080/10550490390201795 PG 6 WC Substance Abuse SC Substance Abuse GA 694PD UT WOS:000183782200002 PM 12851015 ER PT J AU Wiedeman, JE Ritter, EM AF Wiedeman, JE Ritter, EM TI Use of porcine small intestinal submucosa in Ehlers-Danlos syndrome Type IV SO AMERICAN SURGEON LA English DT Article ID PERFORATION; REPAIR; COLON AB Ehlers-Danlos syndrome (EDS) Type IV results in inadequate production of type III collagen and can lead to devastating vascular, gastrointestinal, and uterine complications. A case is presented of spontaneous colonic perforation in a patient with EDS Type IV complicated by multiple intestinal fistulas managed with porcine small intestinal submucosa. Early success with this technique would suggest additional applications in a variety of complicated gastrointestinal problems. C1 USAF, David Grant Med Ctr, Dept Gen Surg, Travis AFB, CA USA. RP Wiedeman, JE (reprint author), 419 Heron Pl, Davis, CA 95616 USA. NR 11 TC 3 Z9 4 U1 0 U2 0 PU SOUTHEASTERN SURGICAL CONGRESS PI ATLANTA PA 141 WEST WIEUCA RD, STE B100, ATLANTA, GA 30342 USA SN 0003-1348 J9 AM SURGEON JI Am. Surg. PD MAY PY 2003 VL 69 IS 5 BP 424 EP 426 PG 3 WC Surgery SC Surgery GA 677YH UT WOS:000182836700015 PM 12769216 ER PT J AU Pavuk, M Schecter, AJ Akhtar, FZ Michalek, JE AF Pavuk, M Schecter, AJ Akhtar, FZ Michalek, JE TI Serum 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) levels and thyroid function in air force veterans of the Vietnam War SO ANNALS OF EPIDEMIOLOGY LA English DT Article DE dioxin; hypothyroidism; Ranch Hand; TCDD; thyroid function; thyroid hormones; TSH; Vietnam veterans ID OPERATION RANCH HAND; THYROXINE-BINDING GLOBULIN; SPRAGUE-DAWLEY RATS; POLYCHLORINATED-BIPHENYLS; FOLLOW-UP; CHLORINATED DIOXINS; POSTNATAL EXPOSURE; DIABETES-MELLITUS; HORMONE LEVELS; PCB EXPOSURE AB PURPOSE: We assessed potential health effects of 2,317,8-tetrachlorodibenzo-p-dioxin (TCDD) concentration in serum on thyroid function in US Air Force veterans involved in Operation Ranch Hand, the unit responsible for the aerial spraying of herbicides, including TCDD-contaminated Agent Orange, during the Vietnam War from 1962 to 1971. Other Air Force veterans who were not involved with spraying herbicides were included as Comparisons. METHODS: We analyzed thyroxine (total T4), thyroid stimulating hormone (TSH), triiodothyronin percent uptake (T3% uptake), the free thyroxine index (FTI), and thyroid diseases against serum TCDD levels. Data was available for 1,009 Ranch Hand and 1,429 Comparison veterans compliant to any of five examinations in 1982, 1985, 1987, 1992, and 1997. Each veteran was assigned to one of four exposure categories based on serum TCDD levels, named Comparison, Ranch Hand Background, Ranch Hand Low Elevated, and Ranch Hand High Elevated. RESULTS: Cross-sectional analyses found statistically significantly increased TSH means at the 1985 and 1987 examinations in the High category and a significant increasing trend across the three Ranch Hand TCDD categories in 1982, 1985, 1987 and 1992. A repeated-measures analysis found significantly increased TSH means in the High TCDD category. We found no significant relation between the occurrence of thyroid disease and TCDD category. CONCLUSIONS: These findings suggest that TCDD affects thyroid hormone metabolism and function in Ranch Hand veterans. Further follow-up will be necessary to understand the relation, if any, between thyroid disease and TCDD levels. (C) 2003 Elsevier Inc. All rights reserved. C1 Univ Texas, Sch Publ Hlth, Dallas, TX 75390 USA. USAF, Res Lab, Brooks AFB, TX USA. RP Michalek, JE (reprint author), Univ Texas, Sch Publ Hlth, 5323 Harry Hines Blvd,V8-112M, Dallas, TX 75390 USA. NR 59 TC 44 Z9 46 U1 0 U2 2 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 1047-2797 J9 ANN EPIDEMIOL JI Ann. Epidemiol. PD MAY PY 2003 VL 13 IS 5 BP 335 EP 343 AR PII S1047-2797(02)00422-2 DI 10.1016/S1047-2797(02)00422-2 PG 9 WC Public, Environmental & Occupational Health SC Public, Environmental & Occupational Health GA 695CL UT WOS:000183813500005 PM 12821272 ER PT J AU Nadeau, LJ He, ZQ Spain, JC AF Nadeau, LJ He, ZQ Spain, JC TI Bacterial conversion of hydroxylamino aromatic compounds by both lyase and mutase enzymes involves intramolecular transfer of hydroxyl groups SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID PSEUDOMONAS-PSEUDOALCALIGENES JS45; COMAMONAS-ACIDOVORANS NBA-10; BAMBERGER REARRANGEMENT; MYCOBACTERIUM STRAIN; DEGRADATIVE PATHWAY; 4-NITROTOLUENE; NITROBENZENE; 4-NITROBENZOATE; BIODEGRADATION; TRANSFORMATION AB Hydroxylamino aromatic compounds are converted to either the corresponding aminophenols or protocatechuate during the bacterial degradation of nitroaromatic compounds. The origin of the hydroxyl group of the products could be the substrate itself (intramolecular transfer mechanism) or the solvent water (intermolecular transfer mechanism). The conversion of hydroxylaminobenzene to 2-aminophenol catalyzed by a mutase from Pseudomonas pseudoalcaligenes JS45 proceeds by an intramolecular hydroxyl transfer. The conversions of hydroxylaminobenzene to 2- and 4-aminophenol by a mutase from Ralstonia eutropha JMP134 and to 4-hydroxylaminobenzoate to protocatechuate by a lyase from Comamonas acidovorans NBA-10 and Pseudomonas sp. strain 4NT were proposed, but not experimentally proved, to proceed by the intermolecular transfer mechanism. GC-MS analysis of the reaction products formed in H(2)(18)O did not indicate any (18)O-label incorporation during the conversion of hydroxylaminobenzene to 2- and 4-aminophenols catalyzed by the mutase from R. eutropha JMP134. During the conversion of 4-hydroxylaminobenzoate catalyzed by the hydroxylaminolyase from Pseudomonas sp. strain 4NT, only one of the two hydroxyl groups in the product, protocatechuate, was (18)O labeled. The other hydroxyl group in the product must have come from the substrate. The mutase in strain JS45 converted 4-hydroxylaminobenzoate to 4-amino-3-hydroxybenzoate, and the lyase in Pseudomonas strain 4NT converted hydroxylaminobenzene to aniline and 2-aminophenol but not to catechol. The results indicate that all three types of enzyme-catalyzed rearrangements of hydroxylamino aromatic compounds proceed via intramolecular transfer of hydroxyl groups. C1 USAF, Res Lab, Tyndall AFB, FL 32403 USA. Univ Maine, New Englans Plant Soil & Water Lab, Orono, ME 04469 USA. RP Spain, JC (reprint author), USAF, Res Lab, 139 Barnes Dr,Ste 2, Tyndall AFB, FL 32403 USA. EM jim.spain@tyndall.af.mil OI He, Zhongqi/0000-0003-3507-5013 NR 36 TC 16 Z9 16 U1 0 U2 7 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0099-2240 J9 APPL ENVIRON MICROB JI Appl. Environ. Microbiol. PD MAY PY 2003 VL 69 IS 5 BP 2786 EP 2793 DI 10.1128/AEM.69.5.2786-2793.2003 PG 8 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 677LD UT WOS:000182808300044 PM 12732549 ER PT J AU Clark, JS Larionov, VM Crowther, PA Egan, MP Arkharov, A AF Clark, JS Larionov, VM Crowther, PA Egan, MP Arkharov, A TI Confirmation of the Luminous Blue Variable nature of AFGL 2298 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : emission-line; Be; stars : circumstellar matter ID LARGE MAGELLANIC CLOUD; MASSIVE STARS; PLANETARY-NEBULAE; STELLAR-WIND; RING NEBULA; SPECTROSCOPY; IRAS-18576+0341; CANDIDATE; CARINAE; WNL AB We present new photometric and spectroscopic observations of the stellar source AFGL 2298 ( = IRAS 18576 + 0341) that has recently been proposed as a candidate Luminous Blue Variable ( LBV). Our data confirm that the star is a highly luminous B supergiant which is both spectroscopically and photometrically variable. Assuming a distance of 10 kpc, comparison of the 2001 June data to synthetic spectra suggest stellar parameters of T = 12.5 kK, log(L/L(.)) = 6.2 and (M) over dot = 5 x 10(-5) M(.) yr(-1). Data obtained in 2002 August indicate an increase in both temperature (= 15 kK) and mass loss rate (= 1.2 x 10(-4) M(.) yr(-1)) at constant bolometric luminosity. These physical parameters place AFGL 2298 at the Humphreys-Davidson limit for the most luminous stars known. We conclude that the position of AFG 2298 in the HR diagram, the significant variability observed between 1999-2002 and presence of a massive ejection nebula are consistent with a classification of AFGL 2298 as a bona fide LBV. C1 UCL, Dept Phys & Astron, London WC1E 6BT, England. St Petersburg State Univ, Astron Inst, St Petersburg 198504, Russia. Isaac Newton Inst Chile, St Petersburg Branch, St Petersburg, Russia. USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. Russian Acad Sci, Cent Astron Observ, St Petersburg 196140, Russia. RP Clark, JS (reprint author), UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England. EM jsc@star.ucl.ac.uk RI Larionov, Valeri/H-1349-2013; OI Larionov, Valeri/0000-0002-4640-4356; Crowther, Paul/0000-0001-6000-6920 NR 26 TC 14 Z9 14 U1 0 U2 0 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2003 VL 403 IS 2 BP 653 EP 658 DI 10.1051/0004-6361:20030389 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 675DY UT WOS:000182678800032 ER PT J AU Eckart, RE Leitch, WS Shry, EA Krasuski, RA Lane, MJ Leclerc, KM AF Eckart, RE Leitch, WS Shry, EA Krasuski, RA Lane, MJ Leclerc, KM TI Utility of magnetic resonance imaging in cardiac venous anatomic variants SO CARDIOVASCULAR AND INTERVENTIONAL RADIOLOGY LA English DT Article DE MR-angiography; vena cava; cardiac; congenital ID SUPERIOR VENA-CAVA; ABSENT RIGHT; CATHETER; BYPASS; HEART AB The incidence of persistent left superior vena cava (PLSVC) is approximately 0.5% in the general population; however, the coexistent absence of the right SVC has a reported incidence in tertiary centers of 0.1%. The vast majority of reports are limited to pediatric cardiology. Likewise, sinus of Valsalva aneurysm is a rare congenital anomaly, with a reported incidence of 0.1-3.5% of all congenital heart defects. We present a 71-year-old patient undergoing preoperative evaluation for incidental finding of aortic root aneurysm, and found to have all three in coexistence. Suggestive findings were demonstrated on cardiac catheterization and definitive diagnosis was made by magnetic resonance imaging. The use of MRI for the diagnosis of asymptomatic adult congenital heart disease will be reviewed. C1 Brooke Army Med Ctr, Serv Cardiol, Ft Sam Houston, TX 78234 USA. Wilford Hall USAF Med Ctr, Serv Cardiol, Lackland AFB, TX 78236 USA. Brooke Army Med Ctr, Dept Radiol, Ft Sam Houston, TX 78234 USA. RP Eckart, RE (reprint author), Brooke Army Med Ctr, Serv Cardiol, 3851 Roger Brooke Dr, Ft Sam Houston, TX 78234 USA. OI Krasuski, Richard/0000-0003-3150-5215 NR 17 TC 6 Z9 6 U1 0 U2 0 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0174-1551 J9 CARDIOVASC INTER RAD JI Cardiovasc. Interv. Radiol. PD MAY-JUN PY 2003 VL 26 IS 3 BP 309 EP 311 DI 10.1007/s00270-003-2635-8 PG 3 WC Cardiac & Cardiovascular Systems; Radiology, Nuclear Medicine & Medical Imaging SC Cardiovascular System & Cardiology; Radiology, Nuclear Medicine & Medical Imaging GA 702LH UT WOS:000184225000020 PM 14562986 ER PT J AU White, DW Ly, JQ Beall, DP McMillan, MD McDermott, JH AF White, DW Ly, JQ Beall, DP McMillan, MD McDermott, JH TI Extraskeletal mesenchymal chondrosarcoma - Case report SO CLINICAL IMAGING LA English DT Article DE mesenchymal chondrosarcoma; cartilaginous tumors; extraskeletal; chondroid tumors; MRI ID BONE AB This is a case report of an extraskeletal mesenchymal chondrosarcoma (ESMC) that originally occurred in the retroperitoneum of a 24-year-old female and later metastasized to the left proximal humerus. Mesenchymal chondrosarcomas are very rare in comparison to conventional chondrosarcomas and even more so when arising from an extraskeletal location. In this report, we discuss the major characteristics of ESMC and offer a review of the current knowledge regarding this rare disease entity. (C) 2003 Elsevier Science Inc. All rights reserved. C1 Wilford Hall USAF Med Ctr, Dept Radiol & Nucl Med, Lackland AFB, TX 78236 USA. Uniformed Serv Univ Hlth Sci, Dept Radiol & Nucl Med, Bethesda, MD 20819 USA. Mayo Clin & Mayo Fdn, Dept Radiol, Rochester, MN 55905 USA. Wright Patterson Med Ctr, Dept Gen Surg, Wright Patterson AFB, OH 45433 USA. RP Ly, JQ (reprint author), Wilford Hall USAF Med Ctr, Dept Radiol & Nucl Med, 2200 Bergquist Dr,Ste 1, Lackland AFB, TX 78236 USA. NR 13 TC 4 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0899-7071 J9 CLIN IMAG JI Clin. Imaging PD MAY-JUN PY 2003 VL 27 IS 3 BP 187 EP 190 DI 10.1016/S0899-7071(02)00538-7 PG 4 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 674YP UT WOS:000182665500009 PM 12727057 ER PT J AU Sinibaldi, JO Driscoll, JF Mueller, CJ Donbar, JM Carter, CD AF Sinibaldi, JO Driscoll, JF Mueller, CJ Donbar, JM Carter, CD TI Propagation speeds and stretch rates measured along wrinkled flames to assess the theory of flame stretch SO COMBUSTION AND FLAME LA English DT Article DE laminar premixed flames; propagation speed; diagnostics ID LAMINAR BURNING VELOCITIES; TURBULENT FLAMES; PREMIXED FLAMES; JET FLAMES; AIR FLAMES; COMBUSTION; DYNAMICS AB Local propagation speeds and stretch rates were measured along a premixed flame that undergoes unsteady wrinkling in order to see if these two quantities correlate in the manner that is predicted by the theory of flame stretch. The Markstein number, which relates these two quantities, also was measured. Previous studies had considered the simple geometries of counterflow or spherical flames, but in this case a complex geometry was generated by interacting a flame,with a vortex, such that both the strain and curvature components of the stretch rate are present. The diagnostics used were shadowgraph movies and simultaneous particle imaging velocimetry and OH planar laser-induced fluorescence. The overall conclusion is that the theory of flame stretch remains valid for these unsteady complex conditions, because the measured trends are found to be in agreement with trends predicted by the theory. That is, propagation speeds decrease at locations where positive stretch is applied to stable (lean propane-air and rich methane-air) flames. Conversely, propagation speeds increase where positive stretch was applied to unstable (lean methane-air) flames. The shape of the profiles of propagation speed along stable flames is opposite to that of unstable flames, as is predicted by the theory. However, values of Markstein number show large variations and are much larger than that of an outwardly propagating spherical flame. Negative strain regions are of particular interest because they previously had not been studied experimentally; these regions yield the largest propagation speeds for the stable cases and some negative speeds for the unstable cases. (C) 2003 The Combustion Institute. All rights reserved. C1 Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA. Sandia Natl Labs, Livermore, CA USA. PRAS, AFRL, Wright Patterson AFB, OH 45433 USA. RP Driscoll, JF (reprint author), Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA. OI Sinibaldi, Jose/0000-0002-9871-0590 NR 29 TC 20 Z9 20 U1 0 U2 6 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD MAY PY 2003 VL 133 IS 3 BP 323 EP 334 DI 10.1016/S0010-2180(03)00016-6 PG 12 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA 689YL UT WOS:000183520500010 ER PT J AU Alvin, KF Robertson, AN Reich, GW Park, KC AF Alvin, KF Robertson, AN Reich, GW Park, KC TI Structural system identification: from reality to models SO COMPUTERS & STRUCTURES LA English DT Article ID EIGENSYSTEM REALIZATION-ALGORITHM; LINEAR-MULTIVARIABLE SYSTEMS; DAMAGE DETECTION; MODAL PARAMETERS; ZEROS; COMPUTATION; EXTRACTION; REDUCTION; WAVELETS AB The paper is an expository contribution on the subject of structural system identification, measured signal processing and their applications to model-based structural health detection. The materials covered in this paper are by and large extracted from the three theses of the first three authors. The paper focuses on the state-space oriented system identification theory as specialized to structural dynamics governing equations of motion, a judicious use of wavelet transformation techniques for extracting impulse response functions, various input-output combinations for multi-input and multi-output problems, robust ways of identifying both proportional and non-proportional damping parameters, and the use of localized identification theory for damage detection from measured response data. The authors then offer several outstanding challenges in structural system identification theory and their applications. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Univ Colorado, Dept Aerosp Engn Sci, Ctr Aerosp Struct, Boulder, CO 80309 USA. Sandia Natl Labs, Struct Dynam Res, Albuquerque, NM 87185 USA. Los Alamos Natl Lab, ESA, WR, Los Alamos, NM 87545 USA. USAF, Res Lab, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA. RP Park, KC (reprint author), Univ Colorado, Dept Aerosp Engn Sci, Ctr Aerosp Struct, Campus Box 429, Boulder, CO 80309 USA. RI park, k.c./E-8898-2010 NR 65 TC 78 Z9 82 U1 1 U2 14 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0045-7949 J9 COMPUT STRUCT JI Comput. Struct. PD MAY PY 2003 VL 81 IS 12 BP 1149 EP 1176 DI 10.1016/S0045-7949(03)00034-8 PG 28 WC Computer Science, Interdisciplinary Applications; Engineering, Civil SC Computer Science; Engineering GA 672YX UT WOS:000182552400004 ER PT J AU Pan, Y Shang, JJS Guo, M AF Pan, Y Shang, JJS Guo, M TI A scalable HPF implementation of a finite-volume computational electromagnetics application on a CRAY T3E parallel systemt SO CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE LA English DT Article DE parallel computers; execution time; efficiency; scalability; loop parallelization; Cray T3E; high performance Fortran ID MULTICOMPUTERS; EQUATIONS AB The time-dependent Maxwell equations are one of the most important approaches to describing dynamic or wide-band frequency electromagnetic phenomena. A sequential finite-volume, characteristic-based procedure for solving the time-dependent, three-dimensional Maxwell equations has been successfully implemented in Fortran before. Due to its need for a large memory space and high demand on CPU time, it is impossible to test the code for a large array. Hence, it is essential to implement the code on a parallel computing system. In this paper, we discuss an efficient and scalable parallelization of the sequential Fortran time-dependent Maxwell equations solver using High Performance Fortran (HPF). The background to the project, the theory behind the. efficiency being achieved, the parallelization methodologies employed and the experimental results obtained on the Cray T3E massively parallel computing system will be described in detail. Experimental runs show that the execution time is reduced drastically through parallel computing. The code is scalable up to 98 processors on the Cray T3E and has a performance similar to that of an MPI implementation. Based on the experimentation carried out in this research, we believe that a high-level parallel programming language such as HPF is a fast, viable and economical approach to parallelizing many existing sequential codes which exhibit a lot of parallelism. Copyright (C) 2003 John Wiley Sons, Ltd. C1 Georgia State Univ, Dept Comp Sci, Atlanta, GA 30303 USA. Air Force Res Lab, Air Vehicle Directorate, Wright Patterson AFB, OH 45433 USA. Univ Aizu, Dept Comp Software, Aizu Wakamatsu, Fukushima 9658580, Japan. RP Pan, Y (reprint author), Georgia State Univ, Dept Comp Sci, Atlanta, GA 30303 USA. NR 21 TC 0 Z9 0 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 1532-0626 J9 CONCURR COMP-PRACT E JI Concurr. Comput.-Pract. Exp. PD MAY PY 2003 VL 15 IS 6 BP 607 EP 621 DI 10.1002/cpe.718 PG 15 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA 673UX UT WOS:000182599600004 ER PT J AU Rapoport, A Stein, WE Parco, JE Nicholas, TE AF Rapoport, A Stein, WE Parco, JE Nicholas, TE TI Equilibrium play and adaptive learning in a three-person centipede game SO GAMES AND ECONOMIC BEHAVIOR LA English DT Article DE centipede game; backward induction; experimental study; high vs. low stakes; adaptive learning ID NORMAL-FORM GAMES; BACKWARD INDUCTION; RATIONALITY; INFORMATION; MODELS AB The two-person centipede game is one of the most celebrated paradoxes of backward induction in complete information extensive form games. An experimental investigation of a three-person centipede game shows that the paradoxical results are strongly affected by the size of the stakes. When the number of players in the game is increased from two to three and the game is played for unusually high stakes with group composition being randomly changed from trial to trial, the paradox is considerably weakened as players approach equilibrium play with multiple iterations of the stage game. When the game is played with low stakes, there is no evidence for equilibrium play or learning across iterations of the stage game. An adaptive learning model that assumes updating of the individual probabilities of choice outperforms alternative static and dynamic models in accounting for the major results observed in the high-stake experiment. (C) 2003 Elsevier Science (USA). All rights reserved. C1 Univ Arizona, Dept Management & Policy, Tucson, AZ 85721 USA. Texas A&M Univ, Dept Informat & Operat Management, College Stn, TX 77843 USA. USAF Acad, Dept Management, Colorado Springs, CO 80840 USA. RP Rapoport, A (reprint author), Univ Arizona, Dept Management & Policy, 405 McClelland Hall, Tucson, AZ 85721 USA. RI Parco, James/I-4836-2012 NR 34 TC 30 Z9 30 U1 0 U2 4 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0899-8256 J9 GAME ECON BEHAV JI Games Econ. Behav. PD MAY PY 2003 VL 43 IS 2 BP 239 EP 265 DI 10.1016/S0899-8256(03)00009-5 PG 27 WC Economics SC Business & Economics GA 678RM UT WOS:000182880300005 ER PT J AU Aziz, JJ Ling, M Rifai, HS Newell, CJ Gonzales, JR AF Aziz, JJ Ling, M Rifai, HS Newell, CJ Gonzales, JR TI MAROS: A decision support system for optimizing monitoring plans SO GROUND WATER LA English DT Article ID NETWORK DESIGN; GROUNDWATER CONTAMINATION; WATER; WELLS AB The The Monitoring and Remediation Optimization System (MAROS), a decision-support software, was developed to assist in formulating cost-effective ground water long-term monitoring plans. MAROS optimizes an existing ground water monitoring program using both temporal and spatial data analyses to determine the general monitoring system category and the locations and frequency of sampling for future compliance monitoring at the site. The objective of the MAROS optimization is to minimize monitoring locations in the sampling network and reduce sampling frequency without significant loss of information, ensuring adequate future characterization of the contaminant plume. The interpretive trend analysis approach recommends the general monitoring system category for a site based on plume stability and site-specific hydrogeologic information. Plume stability is characterized using primary lines of evidence (i.e., Mann-Kendall analysis and linear regression analysis) based on concentration trends, and secondary lines of evidence based on modeling results and empirical data. The sampling optimization approach, consisting of a two-dimensional spatial sampling reduction method (Delaunay method) and a temporal sampling analysis method (Modified CES method), provides detailed sampling location and frequency results. The Delaunay method is designed to identify and eliminate redundant sampling locations without causing significant information loss in characterizing the plume. The Modified CES method determines the optimal sampling frequency for a sampling location based on the direction, magnitude, and uncertainty in its concentration trend. MAROS addresses a variety of ground water contaminants (fuels, solvents, and metals), allows import of various data formats, and is designed for continual modification of long-term monitoring plans as the plume or site conditions change over time. C1 Univ Houston, Houston, TX 77204 USA. Groundwater Serv Inc, Houston, TX 77098 USA. USAF, Ctr Environm Excellence, Brooks AFB, TX 78235 USA. RP Aziz, JJ (reprint author), Univ Houston, 4800 Calhoun Rd,Room N107D, Houston, TX 77204 USA. NR 49 TC 21 Z9 22 U1 4 U2 9 PU GROUND WATER PUBLISHING CO PI WESTERVILLE PA 601 DEMPSEY RD, WESTERVILLE, OH 43081 USA SN 0017-467X J9 GROUND WATER JI Ground Water PD MAY-JUN PY 2003 VL 41 IS 3 BP 355 EP 367 DI 10.1111/j.1745-6584.2003.tb02605.x PG 13 WC Geosciences, Multidisciplinary; Water Resources SC Geology; Water Resources GA 675BF UT WOS:000182672600014 PM 12772829 ER PT J AU Kost, ER Hall, KL Hines, JF Farley, JH Nycum, LR Rose, GS Carlson, JW Fischer, JR Kendall, BS AF Kost, ER Hall, KL Hines, JF Farley, JH Nycum, LR Rose, GS Carlson, JW Fischer, JR Kendall, BS TI Asian-Pacific Islander race independently predicts poor outcome in patients with endometrial cancer SO GYNECOLOGIC ONCOLOGY LA English DT Article ID AFRICAN-AMERICAN WOMEN; P53 PROTEIN OVEREXPRESSION; DATA-BASE REPORT; RACIAL-DIFFERENCES; PROGNOSTIC FACTORS; OVARIAN-CANCER; BREAST-CANCER; CARCINOMA; SURVIVAL; STAGE AB Objective. The Department of Defense health care system provides access to care without respect to age, race, or socioeconomic status. We sought to determine the effect of race as a predictor of survival in patients with endometrial cancer treated in the Department of Defense medical system. Methods. Information on patients with endometrial carcinoma was extracted from the Department of Defense centralized tumor registry for the period 1988 to 1995. Data included age at diagnosis, military status, race, tumor histology, grade, FIGO surgical stage, adjuvant therapies, and disease-free survival. The chi(2) test was used for analysis of prognostic factors and adjuvant treatments between racial groups. Actuarial survival curves were calculated by using the method of Kaplan and Meier and compared by the log-rank test. Variables found to be significant on univariate analysis (P < 0.05) were entered into a multivariate Cox regression analysis. Results. Of 1811 patients meeting criteria for the study, racial distribution was 90% Caucasian, 4.4% African-American, and 5.5% Asian-Pacific Islander. African-Americans had more advanced stages of disease compared to Caucasians (P < 0.001). Both African-Americans and Asian-Pacific Islanders had higher grade tumors and less favorable histologic types than Caucasians (P < 0.05). The extent of adjuvant therapies was similar for racial groups. African-Americans and Asian-Pacific Islanders had significantly worse 5-year disease-free survivals than Caucasians (P = 0.007). Additional poor prognostic factors included age >60 years, grade, unfavorable histology, and stage. On multivariate analysis age >60 years, stage, and Asian-Pacific Islander race remained significant prognostic factors. Conclusion. African-Americans and Asian-Pacific Islanders had worse survivals than Caucasians. After controlling for imbalances in clinicopathologic factors, Asian-Pacific Islander race was found to be a newly identified poor prognostic factor. (C) 2003 Elsevier Science (USA). All rights reserved. C1 Brooke Army Med Ctr, Dept Obstet & Gynecol, Div Gynecol Oncol, Ft Sam Houston, TX 78234 USA. SE Gynecol Oncol, Atlanta, GA 30274 USA. Tripler Army Med Ctr, Dept Obstet & Gynecol, Honolulu, HI 96859 USA. Dept Obstet & Gynecol, Travis AFB, CA 94535 USA. Walter Reed Army Med Ctr, Dept Gynecol Oncol, Washington, DC 20307 USA. Wilford Hall USAF Med Ctr, Dept Clin Invest, Lackland AFB, TX 78236 USA. Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. Dept Pathol, San Antonio, TX 78236 USA. RP Kost, ER (reprint author), Brooke Army Med Ctr, Dept Obstet & Gynecol, Div Gynecol Oncol, Bldg 3600,3851 Roger Brooke Dr, Ft Sam Houston, TX 78234 USA. NR 41 TC 19 Z9 19 U1 2 U2 4 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0090-8258 J9 GYNECOL ONCOL JI Gynecol. Oncol. PD MAY PY 2003 VL 89 IS 2 BP 218 EP 226 DI 10.1016/S0090-8258(03)00050-7 PG 9 WC Oncology; Obstetrics & Gynecology SC Oncology; Obstetrics & Gynecology GA 674PR UT WOS:000182645600005 PM 12713983 ER PT J AU Nelson, DA Walters, TJ Ryan, KL Emerton, KB Hurt, WD Ziriax, JM Johnson, LR Mason, PA AF Nelson, DA Walters, TJ Ryan, KL Emerton, KB Hurt, WD Ziriax, JM Johnson, LR Mason, PA TI Inter-species extrapolation of skin heating resulting from millimeter wave irradiation: Modeling and experimental results SO HEALTH PHYSICS LA English DT Article DE radiation, non-ionizing; skin dose; modeling, dose assessment; radiation damage ID BLOOD-FLOW; THERMAL BALANCE; THERMOREGULATION; HYPERTHERMIA AB This study reports measurements of the skin surface temperature elevations during localized irradiation (94 GHz) of three species: rat (irradiated on lower abdomen), rhesus monkey (posterior forelimb), and human (posterior forearm). Two exposure conditions were examined: prolonged, low power density microwaves (LPM) and short-term, high power density microwaves (HPM). Temperature histories were compared with calculations from a bio-heat transfer model. The mean peak surface temperature increase was approximately 7.0degreesC for the short-term HPM exposures for all three species/locations, and 8.5degreesC (monkey, human) to 10.5degreesC (rat) for the longer-duration LPM exposures. The HPM temperature histories are in close agreement with a one-dimensional conduction heat transfer model with negligible blood flow. The LPM temperature histories were compared with calculations from the bio-heat model, evaluated for various (constant) blood flow rates. Results suggest a variable blood flow model, reflecting a dynamic thermoregulatory response, may be more suited to describing skin surface temperature response under long-duration MMW irradiation. C1 Michigan Technol Univ, Dept Biomed Engn, Houghton, MI 49931 USA. USA, Inst Surg Res, Ft Sam Houston, TX 78234 USA. USAF, Res Lab, Radio Frequency Radiat Branch, Brooks AFB, TX 78235 USA. USN, Hlth Res Ctr Detachment, Brooks AFB, TX USA. RP Nelson, DA (reprint author), Michigan Technol Univ, Dept Biomed Engn, Houghton, MI 49931 USA. EM danelson@mtu.edu NR 28 TC 9 Z9 14 U1 0 U2 2 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD MAY PY 2003 VL 84 IS 5 BP 608 EP 615 DI 10.1097/00004032-200305000-00006 PG 8 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 668AZ UT WOS:000182269300006 PM 12747480 ER PT J AU Greiner, MA Fowler, JW Shunk, DL Carlyle, WM McNutt, RT AF Greiner, MA Fowler, JW Shunk, DL Carlyle, WM McNutt, RT TI A hybrid approach using the analytic hierarchy process and integer programming to screen weapon systems projects SO IEEE TRANSACTIONS ON ENGINEERING MANAGEMENT LA English DT Article DE analytic hierarchy process; integer programming; research and development (R&D) management; R&D project selection; weapon systems ID PRODUCT DEVELOPMENT; PORTFOLIO; SELECTION; MANAGEMENT; DECISION; RISK AB Screening weapon systems development projects is a complex, multicriteria decision problem that must be accomplished within a constrained resource environment. This paper presents a hybrid decision support methodology for use in the screening of weapon systems development projects. The hybrid methodology integrates the analytic hierarchy process (AHP) with a 0-1 integer portfolio optimization model. An AHP component allows the decision maker to incorporate qualitative and intangible criteria. into the decision-making process and use the priority rankings of the AHP to represent a measure of value in the 0-1 integer model objective function. The-hybrid methodolpgy is extremely flexible and the decision maker can tailor both the AHP and the 0-1 integer optimization model to represent a specific decision-making situation. To fully appreciate the added value of implementing the hybrid screening methodology, a group of Air Force decision makers applied the hybrid methodology to a realistic weapon-systems project screening activity. Results indicate that decision support provided by the methodology could lead to substantial improvements in a weapon-systems portfolio value. C1 USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA. Arizona State Univ, Dept Ind Engn, Tempe, AZ 85287 USA. USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA. Air Command & Staff Coll, Maxwell AFB, AL 36112 USA. RP Greiner, MA (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA. RI Fowler, John/E-9426-2011; de Lima, Andreia/G-8040-2014 OI Fowler, John/0000-0002-7112-8031; NR 39 TC 25 Z9 29 U1 3 U2 10 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9391 J9 IEEE T ENG MANAGE JI IEEE Trans. Eng. Manage. PD MAY PY 2003 VL 50 IS 2 BP 192 EP 203 DI 10.1109/TEM.2003.810827 PG 12 WC Business; Engineering, Industrial; Management SC Business & Economics; Engineering GA 686VE UT WOS:000183341000007 ER PT J AU Zhang, Y Collins, L Yu, HT Baum, CE Carin, L AF Zhang, Y Collins, L Yu, HT Baum, CE Carin, L TI Sensing of unexploded ordnance with magnetometer and induction data: Theory and signal processing SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING LA English DT Article DE induction; magnetometer; parametric model; sensing; signal processing; unexploded ordnance ID CLASSIFICATION; TARGET AB We consider the detection of subsurface unexploded ordnance via magnetometer and electromagnetic-induction (EMI) sensors. Detection performance is presented, using model-based signal processing algorithms. We first develop and validate the parametric models, using both numerical and measured data. These models are then applied in the context of feature extraction, and the features are processed via two signal-processing algorithms. The detection algorithms are discussed in detail, with comparisons made based on performance with measured magnetometer and EMI data. C1 Duke Univ, Dept Elect & Comp Engn, Durham, NC 27708 USA. USAF, Res Lab, Directed Energy Directorate, Albuquerque, NM 87108 USA. RP Zhang, Y (reprint author), Duke Univ, Dept Elect & Comp Engn, Durham, NC 27708 USA. NR 16 TC 101 Z9 101 U1 1 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0196-2892 J9 IEEE T GEOSCI REMOTE JI IEEE Trans. Geosci. Remote Sensing PD MAY PY 2003 VL 41 IS 5 BP 1005 EP 1015 DI 10.1109/TGRS.2003.810922 PN 1 PG 11 WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote Sensing; Imaging Science & Photographic Technology SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology GA 692PT UT WOS:000183670000008 ER PT J AU Smirnov, A Pashkin, M Chilov, N Levashova, T Haritatos, F AF Smirnov, A Pashkin, M Chilov, N Levashova, T Haritatos, F TI Knowledge source network configuration approach to knowledge logistics SO INTERNATIONAL JOURNAL OF GENERAL SYSTEMS LA English DT Article DE knowledge fusion; ontology representation; intelligent agents; KSNet-approach ID ONTOLOGIES AB Today multidisciplinary real-world problem solving requires an intensive knowledge integration and exchange between participants of the global information environment. Along with a large number of available distributed knowledge sources (KSs) this has led to the appearance of a new direction in knowledge management called knowledge logistics (KL). The paper describes a KSNet-approach, being developed to build an intelligent support system addressing problems of KL through knowledge fusion (KF). The approach is mainly based on such technologies as ontology management and intelligent agents. In the KSNet-approach, a multi-agent system architecture based on FIPA Reference Model was chosen as a technological basis for definition of agent properties and functions and FIPA ontology definition was used for knowledge representation. As a general model of ontology representation the object-oriented constraint network paradigm was proposed. The most important ideas of the proposed KSNet-approach were implemented and verified via a developed software prototype of the system "KSNet". C1 Russian Acad Sci, St Petersburg Inst Informat & Automat, St Petersburg 199178, Russia. USAF, Res Lab, Informat Directorate, Rome, NY USA. RP Smirnov, A (reprint author), Russian Acad Sci, St Petersburg Inst Informat & Automat, 39,14th Line, St Petersburg 199178, Russia. RI Wang, Charles/B-5565-2011; Smirnov, Alexander/A-7557-2012; Shilov, Nikolay/A-7559-2012; Levashova, Tatiana/E-3643-2012; Pashkin, Michael/E-3985-2012 OI Wang, Charles/0000-0001-9331-8437; NR 26 TC 36 Z9 37 U1 0 U2 7 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0308-1079 J9 INT J GEN SYST JI Int. J. Gen. Syst. PD MAY PY 2003 VL 32 IS 3 BP 251 EP 269 DI 10.1080/0308107031000107766 PG 19 WC Computer Science, Theory & Methods; Ergonomics SC Computer Science; Engineering GA 678QD UT WOS:000182877200004 ER PT J AU McLeod, IK Brooks, DB Mair, EA AF McLeod, IK Brooks, DB Mair, EA TI Revision choanal atresia repair SO INTERNATIONAL JOURNAL OF PEDIATRIC OTORHINOLARYNGOLOGY LA English DT Article DE choanal atresia; transnasal endoscopic revision; microdebridement; mitomycin-C; image guided surgery ID ENDOSCOPIC REPAIR; MANAGEMENT AB Objective: Since the first description of choanal, atresia (CA) in 1755, multiple surgical techniques have been proposed to repair the malformation. Today, the transnasal endoscopic method is the most widely accepted repair technique. The bony choanal plates are perforated, the lateral choanae are drilled, and a portion of the vomer removed. Unfortunately, the problem of re-stenosis is a significant issue, and as a result, revision surgery may be a recurring theme in some children. We describe a successful revision endoscopic technique utilizing a microdebrider with straight and 120degrees telescopes, image guided surgery, and topical mitomycin-C to permanently open the choanae without stenting. Methods: Described are six children (1-15 years old) with CA or stenosis who have collectively undergone 25 choanal procedures at various institutions. A microdebrider carefully removes the bony septum under direct nasal and intraoral telescopic visualization. No lateral drilling is performed. Image guidance is helpful when excessive scar tissue is present. Topical mitomycin-C minimizes post-operative scarring. The cartilaginous septum is left intact. Results: 2-4-year clinical and endoscopic follow-up on all children revealed a widely patent nasal airway with no complications (epistaxis, crusting, or re-stenosis). Synechiae or re-stenosis did not occur as circumferential mucosal stripping was avoided. No stenting was needed since the bony septum is removed. Conclusion: Near total endoscopic removal of the bony septum provides long-term nasal patency for revision CA/stenosis repairs. The endoscopic 'common choanae' technique is aided by transnasal. and transoral telescopic visualization with precise microdebrider removal of the bony septum. The technique is safe with no complications in our case series. (C) 2003 Published by Elsevier Science Ireland Ltd. C1 Walter Reed Army Med Ctr, Dept Otorhinolaryngol, Washington, DC 20307 USA. RP Mair, EA (reprint author), Wilford Hall USAF Med Ctr, Director Pediat Otolaryngol, 2200 Bergquist Dr Suite 1, San Antonio, TX 78236 USA. NR 21 TC 31 Z9 32 U1 0 U2 0 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0165-5876 J9 INT J PEDIATR OTORHI JI Int. J. Pediatr. Otorhinolaryngol. PD MAY PY 2003 VL 67 IS 5 BP 517 EP 524 DI 10.1016/S0165-5876(03)00012-0 PG 8 WC Otorhinolaryngology; Pediatrics SC Otorhinolaryngology; Pediatrics GA 676NL UT WOS:000182758400010 PM 12697354 ER PT J AU Hutapea, P Yuan, FG Pagano, NJ AF Hutapea, P Yuan, FG Pagano, NJ TI Micro-stress prediction in composite laminates with high stress gradients SO INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES LA English DT Article DE laminates; stress; micro-polar ID ELASTICITY; CRACK AB The objective of this research is to develop a macroscopic theory, which can provide the connection between macromechanics and micro-mechanics in characterizing the micro-stress of composite laminates in regions of high macroscopic stress gradients. The micro-polar theory, a class of higher-order elasticity theory, of composite laminate mechanics is implemented in a well-known Pipes Pagano free edge boundary problem. The micro-polar homogenization method to determine the micro-polar anisotropic effective elastic moduli is presented. A displacement-based finite element method based on micro-polar theory in anisotropic solids is developed in analyzing composite laminates. The effects of fiber volume fraction and cell size on the normal stress along the artificial interface resulting from ply homogenization of the composite laminate are also investigated. The stress response based on micro-polar theory is compared with those deduced from the micro-mechanics and classical elasticity theory. Special attention of the investigation focuses on the stress fields near the free edge where the high macro-stress gradient occurs. The normal stresses along the artificial interface and especially, the micro-stress along the fiber/matrix interface on the critical cell near the free edge where the high macro-stress gradient detected are the focus of this investigation. These micro-stresses are expected to dominate the failure initiation process in composite laminate. A micro-stress recovery scheme based on micro-polar analysis for the prediction of interface micro-stresses in the critical cell near the free edge is found to be in very good agreement with "exact" micro-stress solutions. It is demonstrated that the micro-polar theory is able to capture the micro-stress accurately from the homogenized solutions. (C) 2002 Elsevier Science Ltd. All rights reserved. C1 N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA. AFRL, MLBM, Wright Patterson AFB, OH 45433 USA. RP Yuan, FG (reprint author), N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA. NR 33 TC 5 Z9 6 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0020-7683 J9 INT J SOLIDS STRUCT JI Int. J. Solids Struct. PD MAY PY 2003 VL 40 IS 9 BP 2215 EP 2248 DI 10.1016/S0020-7683(03)00018-0 PG 34 WC Mechanics SC Mechanics GA 665WA UT WOS:000182143200010 ER PT J AU Andreason, KW Kerrison, JB Holck, DEE Blaydon, SM Lancaster, JL Richardson, LA Morrison, JC Zamarripa, FE Fox, PT AF Andreason, KW Kerrison, JB Holck, DEE Blaydon, SM Lancaster, JL Richardson, LA Morrison, JC Zamarripa, FE Fox, PT TI PET scanning in essential blepharospasm SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract CT Annual Meeting of the Association-for-Research-in-Vision-and-Ophthalmology CY MAY 04, 2003 CL FT LAUDERDALE, FLORIDA SP Assoc Res Vis & Ophthalmol C1 Wilford Hall USAF Med Ctr, Dept Ophthalmol, San Antonio, TX 78236 USA. Wilford Hall USAF Med Ctr, Dept Nucl Med, San Antonio, TX 78236 USA. Johns Hopkins Univ Hosp, Wilmer Eye Inst, Baltimore, MD 21287 USA. Brooke Army Med Ctr, Dept Ophthalmol, San Antonio, TX USA. Univ Texas, Hlth Sci Ctr, Res Imaging Ctr, San Antonio, TX USA. RI Lancaster, Jack/F-2994-2010 NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASSOC RESEARCH VISION OPHTHALMOLOGY INC PI ROCKVILLE PA 12300 TWINBROOK PARKWAY, ROCKVILLE, MD 20852-1606 USA SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAY PY 2003 VL 44 SU 2 MA 2722 BP U36 EP U36 PG 1 WC Ophthalmology SC Ophthalmology GA 709CK UT WOS:000184607000189 ER PT J AU Hamilton, MT Holck, DEE Ng, JD Wettlaufer-Jumper, J DeMartelaere, S Foster, JA Blaydon, SM Gardner, B AF Hamilton, MT Holck, DEE Ng, JD Wettlaufer-Jumper, J DeMartelaere, S Foster, JA Blaydon, SM Gardner, B TI Hydrogel orbital implants stimulate greater bony orbital development than dermis fat grafting in the pediatric porcine anophthalmic socket SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract CT Annual Meeting of the Association-for-Research-in-Vision-and-Ophthalmology CY MAY, 2003 CL FT LAUDERDALE, FLORIDA SP Assoc Res Vis & Ophthalmol C1 Brooke Army Med Ctr, San Antonio, TX USA. Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. Oregon Hlth Sci Univ, Casey Eye Inst, Portland, OR 97201 USA. Ophthalm Consultants Ohio, Columbus, OH USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASSOC RESEARCH VISION OPHTHALMOLOGY INC PI ROCKVILLE PA 12300 TWINBROOK PARKWAY, ROCKVILLE, MD 20852-1606 USA SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAY PY 2003 VL 44 SU 1 MA 2226 BP U380 EP U380 PG 1 WC Ophthalmology SC Ophthalmology GA 709CH UT WOS:000184606802151 ER PT J AU MacKersie, DL Cho, RI Goodman, RL Jumper, JM AF MacKersie, DL Cho, RI Goodman, RL Jumper, JM TI Comparison of BSS Plus (TM) and Dextrose-Bicarbonate-Lactated Ringers solution for intraocular irrigation during phacoemulsification SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract CT Annual Meeting of the Association-for-Research-in-Vision-and-Ophthalmology CY MAY, 2003 CL FT LAUDERDALE, FLORIDA SP Assoc Res Vis & Ophthalmol C1 Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. Brooke Army Med Ctr, San Antonio, TX USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASSOC RESEARCH VISION OPHTHALMOLOGY INC PI ROCKVILLE PA 12300 TWINBROOK PARKWAY, ROCKVILLE, MD 20852-1606 USA SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAY PY 2003 VL 44 SU 1 MA 230 BP U41 EP U41 PG 1 WC Ophthalmology SC Ophthalmology GA 709CH UT WOS:000184606800207 ER PT J AU Marshall, SB Kerrison, JB Holck, DEE Blaydon, SM AF Marshall, SB Kerrison, JB Holck, DEE Blaydon, SM TI Thyroid antibodies in association with thyroid ophthalmopathy SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract CT Annual Meeting of the Association-for-Research-in-Vision-and-Ophthalmology CY MAY 04, 2003 CL FT LAUDERDALE, FLORIDA SP Assoc Res Vis & Ophthalmol C1 Wilford Hall USAF Med Ctr, San Antonio, TX USA. Johns Hopkins Univ Hosp, Wilmer Eye Inst, Baltimore, MD USA. Brooke Army Med Ctr, San Antonio, TX USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASSOC RESEARCH VISION OPHTHALMOLOGY INC PI ROCKVILLE PA 12300 TWINBROOK PARKWAY, ROCKVILLE, MD 20852-1606 USA SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAY PY 2003 VL 44 SU 2 MA 4610 BP U609 EP U609 PG 1 WC Ophthalmology SC Ophthalmology GA 709CK UT WOS:000184607002069 ER PT J AU McCauley, MB Holck, DEE DeMartelaere, S Blaydon, S Ng, JD Foster, JA AF McCauley, MB Holck, DEE DeMartelaere, S Blaydon, S Ng, JD Foster, JA TI Improved vascularization rate of porous polyethylene orbital implants containing synthetic bone graft particulate SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract CT Annual Meeting of the Association-for-Research-in-Vision-and-Ophthalmology CY MAY, 2003 CL FT LAUDERDALE, FLORIDA SP Assoc Res Vis & Ophthalmol C1 Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. Brooke Army Med Ctr, San Antonio, TX USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASSOC RESEARCH VISION OPHTHALMOLOGY INC PI ROCKVILLE PA 12300 TWINBROOK PARKWAY, ROCKVILLE, MD 20852-1606 USA SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAY PY 2003 VL 44 SU 1 MA 2217 BP U379 EP U379 PG 1 WC Ophthalmology SC Ophthalmology GA 709CH UT WOS:000184606802146 ER PT J AU Reilly, CD Jumper, JM Reed, JB AF Reilly, CD Jumper, JM Reed, JB TI Branch retinal vein occlusions are associated with serologic evidence of Chlamydia pneumoniae infection SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract CT Annual Meeting of the Association-for-Research-in-Vision-and-Ophthalmology CY MAY 04, 2003 CL FT LAUDERDALE, FLORIDA SP Assoc Res Vis & Ophthalmol C1 Wilford Hall USAF Med Ctr, Dept Ophthalmol, MCST, MDW 59, Lackland AFB, TX 78236 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASSOC RESEARCH VISION OPHTHALMOLOGY INC PI ROCKVILLE PA 12300 TWINBROOK PARKWAY, ROCKVILLE, MD 20852-1606 USA SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAY PY 2003 VL 44 SU 2 MA 3100 BP U114 EP U114 PG 1 WC Ophthalmology SC Ophthalmology GA 709CK UT WOS:000184607000569 ER PT J AU Van Zee, A Jumper, JM Hainsworth, DP McCuen, BW AF Van Zee, A Jumper, JM Hainsworth, DP McCuen, BW TI Traumatic macular holes: A comparison of surgical repair to natural history SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract CT Annual Meeting of the Association-for-Research-in-Vision-and-Ophthalmology CY MAY, 2003 CL FT LAUDERDALE, FLORIDA SP Assoc Res Vis & Ophthalmol C1 Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. St Marys Retina Res Fund, San Francisco, CA USA. Univ Missouri, Mason Eye Inst, Columbia, MO 65211 USA. Duke Univ, Ctr Eye, Durham, NC 27706 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASSOC RESEARCH VISION OPHTHALMOLOGY INC PI ROCKVILLE PA 12300 TWINBROOK PARKWAY, ROCKVILLE, MD 20852-1606 USA SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAY PY 2003 VL 44 SU 1 MA 1845 BP U426 EP U426 PG 1 WC Ophthalmology SC Ophthalmology GA 709CH UT WOS:000184606801793 ER PT J AU Torvik, PJ AF Torvik, PJ TI A note on the estimation of nonlinear system damping SO JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME LA English DT Article AB System damping for a single mode in resonance is often estimated from a measurement of the bandwidth of the frequency response function. While the bandwidth is customarily measured between the half-power frequencies, it is also possible to choose any other fraction of the maximum amplitude. If the damping is linear i.e., if the loss factor is independent of amplitude, the same damping will be found with any such choice. While intuition might suggest that the damping of a nonlinear system would be better estimated from a bandwidth taken closer to the maximum amplitude, this is shown to be false. C1 USAF, Inst Technol, Xenia, OH 45385 USA. RP Torvik, PJ (reprint author), USAF, Inst Technol, 1866 Winchester Rd, Xenia, OH 45385 USA. NR 4 TC 6 Z9 6 U1 0 U2 2 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0021-8936 J9 J APPL MECH-T ASME JI J. Appl. Mech.-Trans. ASME PD MAY PY 2003 VL 70 IS 3 BP 449 EP 450 DI 10.1115/1.1571859 PG 2 WC Mechanics SC Mechanics GA 698RD UT WOS:000184011800018 ER PT J AU Lu, WJ Mitchel, WC Landis, GR Crenshaw, TR Collins, WE AF Lu, WJ Mitchel, WC Landis, GR Crenshaw, TR Collins, WE TI Catalytic graphitization and Ohmic contact formation on 4H-SiC SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID SILICON-CARBIDE; RAMAN-SPECTRA; INTERFACIAL REACTIONS; 4H-SILICON CARBIDE; AMORPHOUS-CARBON; SIC DEVICES; GRAPHITE; FILMS; TITANIUM; METALS AB Electrical contact properties and graphitic structures of metal/carbon/4H-SiC structures are investigated. Metals studied include Ni, Co, Cr, NiCr, Ti, W, Mo, Al, and Au. Ohmic contacts are formed on Ni/C, Co/C, Cr/C, and NiCr/C films on 4H-SiC with n-type, C-face, and a doping concentration of 1.8x10(19) cm(-3) . Only Ni/C and Co/C films exhibit Ohmic contact behavior on SiC with n-type, Si-face, and a doping concentration of 1.6x10(18) cm(-3). Ni and Co are well known as excellent graphitization catalysts. Raman spectra show that the formation of graphitic carbon is related to the formation of Ohmic contacts in the annealed metal/carbon/SiC structures. Generally accepted catalytic graphitization mechanisms are applied to explain the scanning electron microscopy images, which demonstrate a relationship between the catalytically reacted morphology and Ohmic contact behavior. This study provides evidence that the metals with better catalytic graphitization activities form better Ohmic contacts on metal/carbon/SiC structures. (C) 2003 American Institute of Physics. C1 Fisk Univ, Dept Phys, Nashville, TN 37208 USA. USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Univ Dayton, Res Inst, Dayton, OH 45469 USA. RP Lu, WJ (reprint author), Fisk Univ, Dept Phys, Nashville, TN 37208 USA. EM wlu@fisk.edu NR 51 TC 35 Z9 40 U1 4 U2 20 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 2003 VL 93 IS 9 BP 5397 EP 5403 DI 10.1063/1.1562737 PG 7 WC Physics, Applied SC Physics GA 668MA UT WOS:000182296700064 ER PT J AU O'Connell, RJ Merritt, TM Malia, JA VanCott, TC Dolan, MJ Zahwa, H Bradley, WP Branson, BM Michael, NL De Witt, CC AF O'Connell, RJ Merritt, TM Malia, JA VanCott, TC Dolan, MJ Zahwa, H Bradley, WP Branson, BM Michael, NL De Witt, CC TI Performance of the OraQuick rapid antibody test for diagnosis of human immunodeficiency virus type 1 infection in patients with various levels of exposure to highly active antiretroviral therapy SO JOURNAL OF CLINICAL MICROBIOLOGY LA English DT Article ID HIV; CLINICS AB With oral mucosal transudate and serum samples from 101 human immunodeficiency virus type 1 (HIV-1)-infected subjects and 100 HIV-1-negative volunteers, the OraQuick HIV-1 test demonstrated 100% specificity and 96% sensitivity. Four false-negative subjects, who were characterized by early initiation of effective antiretroviral therapy, demonstrated waning serum anti-gp41 titers and Western blot band intensities. C1 Wilford Hall USAF Med Ctr, Dept Infect Dis, Lackland AFB, TX 78236 USA. Walter Reed Army Med Ctr, Div Retrovirol, Rockville, MD 20850 USA. Henry M Jackson Fdn, Rockville, MD 20850 USA. Ctr Dis Control & Prevent, Natl Ctr HIV STD & TB Prevent, Atlanta, GA 30333 USA. RP O'Connell, RJ (reprint author), Wilford Hall USAF Med Ctr, Dept Infect Dis, 59MDW-MMII,2200 Bergquist Dr,Ste 1, Lackland AFB, TX 78236 USA. NR 12 TC 55 Z9 55 U1 0 U2 5 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0095-1137 J9 J CLIN MICROBIOL JI J. Clin. Microbiol. PD MAY PY 2003 VL 41 IS 5 BP 2153 EP 2155 DI 10.1128/JCM.41.5.2153-2155.2003 PG 3 WC Microbiology SC Microbiology GA 679QY UT WOS:000182934500056 PM 12734265 ER PT J AU Muszynski, LC Purcell, MR AF Muszynski, LC Purcell, MR TI Composite reinforcement to strengthen existing concrete structures against air blast SO JOURNAL OF COMPOSITES FOR CONSTRUCTION LA English DT Article DE composite materials; retrofitting; concrete structures; airblast; laminates AB The Wright Laboratory Air Base Survivability Section has been studying the development, application, and effects of externally applied composite reinforcing materials. The strengthened facilities would be capable of surviving an air-blast load at relatively short stand-off distances (11-15 m). An agreement was reached with the Israeli officials to conduct full-scale explosive tests in Israel using 860,kg of TNT on structures that had been reinforced externally with composite reinforcing materials. The strengthening procedure employed in this study involved two types of material: (1) an autoclave-cured, three-ply, carbon fiber-epoxy laminate; and (2) a knitted biaxial E-glass fabric. The Air Base Survivability Section applied the composite materials in Israel after the facilities had been constructed using an epoxy adhesive to bond the composite materials to the concrete substrate. This provided a simple, effective, and-quick method of retrofitting an existing structure. The free-field and reflected pressures and accelerations on the walls were measured. The results of these tests were considered successful, considering the fact that the externally reinforced walls suffered high displacements, yet did not fail. The pressure and impulse data indicate that both structures would have failed catastrophically without the externally applied composite reinforcing materials. C1 Univ Florida, Gainesville, FL 32611 USA. Appl Res Associates, Gulf Coast Div, Tyndall AFB, FL 32403 USA. RP Muszynski, LC (reprint author), Univ Florida, POB 115703, Gainesville, FL 32611 USA. NR 11 TC 25 Z9 28 U1 0 U2 1 PU ASCE-AMER SOC CIVIL ENGINEERS PI RESTON PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA SN 1090-0268 J9 J COMPOS CONSTR JI J. Compos. Constr. PD MAY PY 2003 VL 7 IS 2 BP 93 EP 97 DI 10.1061/(ASCE)1090-0268(2003)7:2(93) PG 5 WC Engineering, Civil; Mechanics; Materials Science, Composites SC Engineering; Mechanics; Materials Science GA 669BZ UT WOS:000182333200002 ER PT J AU Muszynski, LC Purcell, MR AF Muszynski, LC Purcell, MR TI Use of composite reinforcement to strengthen concrete and air-entrained concrete masonry walls against air blast SO JOURNAL OF COMPOSITES FOR CONSTRUCTION LA English DT Article DE composite materials; retrofitting; aramid; laminates; masonry; airblast AB Two concrete structures and three air-entrained concrete (AEC) masonry walls were subjected to two, high explosive detonations. The concrete structures were placed at a stand-off distance such that medium damage was expected. The stand-off distance of the AEC-masonry walls was reduced on each successive detonation until breaching occurred. The two concrete structures retrofitted with composite materials were subjected to air-blast loading at a stand-off distance of approximately 14.6 m. The structures, were constructed such that each long side of the structure contained a wall retrofitted with a composite material and a wall left bare as a control. Both concrete structures exhibited less residual displacement on the walls strengthened with composite materials than the bare control walls. C1 Univ Florida, Gainesville, FL 32611 USA. Appl Res Associates, Gulf Coast Div, Tyndall AFB, FL 32403 USA. RP Muszynski, LC (reprint author), Univ Florida, POB 115703, Gainesville, FL 32611 USA. NR 15 TC 20 Z9 22 U1 1 U2 4 PU ASCE-AMER SOC CIVIL ENGINEERS PI RESTON PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA SN 1090-0268 J9 J COMPOS CONSTR JI J. Compos. Constr. PD MAY PY 2003 VL 7 IS 2 BP 98 EP 108 DI 10.1061/(ASCE)1090-0268(2003)7:2(98) PG 11 WC Engineering, Civil; Mechanics; Materials Science, Composites SC Engineering; Mechanics; Materials Science GA 669BZ UT WOS:000182333200003 ER PT J AU Lu, WJ Mitchel, WC Thornton, CA Landis, GR Collins, WE AF Lu, WJ Mitchel, WC Thornton, CA Landis, GR Collins, WE TI Carbon structural transitions and ohmic contacts on 4H-SiC SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article DE SiC; ohmic contact formation; graphitization; nano-graphitic structures ID AMORPHOUS-CARBON; RAMAN-SPECTROSCOPY; FILMS; TEMPERATURE; SCATTERING; SPECTRA; DEVICES; BAND AB The structural properties of sputtered carbon films on SiC are investigated using X-ray photoelectron spectroscopy (YPS) and Raman scattering. The as-deposited films are amorphous with an sp(2)/sp(3) ratio of 1. The sp(2) carbon structures gradually increase with increasing temperatures and consist of amorphous aromatic-like carbon, polyene-like carbon, and nano-size graphite flakes. Schottky contacts on carbon/SiC are converted to ohmic contacts after annealing. The concentration of nano-graphitic flakes relative to the aromatic-like and polyene-like carbon increases nearly linearly with annealing temperature. Stacked graphitic structures are not observed. The specific contact resistivities are at 10(-3)-10(-4)Omegacm(2) on the carbon/SiC after nnnealing from 1050degreesC to 1350degreesC. C1 Fisk Univ, Dept Phys, Nashville, TN 37208 USA. USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Univ Dayton, Res Inst, Dayton, OH 45469 USA. RP Fisk Univ, Dept Phys, Nashville, TN 37208 USA. EM wlu@fisk.edu NR 25 TC 25 Z9 29 U1 1 U2 4 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0361-5235 EI 1543-186X J9 J ELECTRON MATER JI J. Electron. Mater. PD MAY PY 2003 VL 32 IS 5 BP 426 EP 431 DI 10.1007/s11664-003-0172-5 PG 6 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA 676UE UT WOS:000182770100027 ER PT J AU Capano, MA Patterson, JK Petry, L Solomon, JS AF Capano, MA Patterson, JK Petry, L Solomon, JS TI Time-dependent characteristics of titanium-silicide contacts to 6H-silicon carbide SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article DE silicon carbide; contacts; silicides ID THIN-FILMS; TRANSFORMATION; MICROSTRUCTURE; NUCLEATION AB The processing conditions necessary to achieve low resistivity of the C54-TiSi2 phase in contact with 6H-SiC are explored. This study demonstrates that an interlayer of Si between a Ti layer and the 6H-SiC substrate suppresses the formation of TiC, and that a metallization consisting of either Ti-rich or Si-rich silicide phases may be chosen. When the Ti-to-Si layer thickness ratio is 1:3, the C54-TiSi2 and TiSi phases are observed following a 600degreesC/30 min and an 850degreesC/30 min annealing cycle. When the Ti-to-Si layer thickness ratio is 1:1, Ti5Si3 and TiSi phases are observed following the same annealing cycle. Time-dependent, in-situ resistance measurements are rationalized in terms of these microstructural developments. The Ti5Si3/TiSi structure is demonstrated to have a resistivity of 239 muOmega(.)cm, whereas the TiSi2/TiSi structure has a resistivity of only 23 muOmega(.)cm. Explanations for different microstructures observed are presented. C1 Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA. USAF, Res Lab, Mat Directorate, Wright Patterson AFB, OH 45433 USA. RP Capano, MA (reprint author), Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA. NR 27 TC 3 Z9 3 U1 1 U2 5 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD MAY PY 2003 VL 32 IS 5 BP 458 EP 463 DI 10.1007/s11664-003-0178-z PG 6 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA 676UE UT WOS:000182770100033 ER PT J AU Adams, BJ AF Adams, BJ TI Establishing personal identification based on specific patterns of missing, filled, and unrestored teeth SO JOURNAL OF FORENSIC SCIENCES LA English DT Article DE forensic science; forensic odontology; diversity; dental patterns; empirical comparison; human identification; personal identification; concordance; NHANES III; TSCOHS; OdontoSearch ID DENTAL IDENTIFICATION AB The primary goal of this research is to examine the overall utility of nonradiographic dental records for the establishment of individual identifications. It was found that even without radiographic lines of comparison, charts and notes that accurately detail a missing individual's antemortem dental condition can be essential for establishing an identification. Based on an analysis of two large datasets, individual dental patterns were determined to be generally unique, or at least very uncommon. Through this type of empirical comparison, it is possible to establish a strong, quantifiable association with a missing individual. The results of this research indicate that a definitive number of points of concordance do not need to be established in dental identification cases. Each case must be assessed individually. The critical factor is to remove subjective judgment calls from dental comparisons. This research has proposed a new method of empirical comparison that allows forensic odontologists to derive objective frequency information regarding the occurrence of specific dental patterns in the general population. The method is similar to that used for mtDNA casework, and a computer program (OdontoSearch) has been developed to make the technique accessible. It was found that even a small number of common dental characteristics may produce a very rare dental pattern, a point that may be counterintuitive to many forensic odontologists. C1 USA, CILHI, Cent Identificat Lab, Hickam AFB, HI 96853 USA. RP Adams, BJ (reprint author), USA, CILHI, Cent Identificat Lab, 310 Worchester Ave, Hickam AFB, HI 96853 USA. NR 24 TC 32 Z9 34 U1 3 U2 8 PU AMER SOC TESTING MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 USA SN 0022-1198 J9 J FORENSIC SCI JI J. Forensic Sci. PD MAY PY 2003 VL 48 IS 3 BP 487 EP 496 PG 10 WC Medicine, Legal SC Legal Medicine GA 674CT UT WOS:000182619800001 PM 12762515 ER PT J AU Adams, BJ AF Adams, BJ TI The diversity of adult dental patterns in the united states and the implications for personal identification SO JOURNAL OF FORENSIC SCIENCES LA English DT Article DE forensic science; diversity; dental patterns; forensic odontology; human identification; NHANES III; TSCOHS; mitochondrial DNA ID MITOCHONDRIAL-DNA AB Few would argue about the individuality of dental radiographs for forensic identification, but when an antemortem/postmortem comparison is based strictly on dental treatment notes and/or charts it becomes less certain. In the past, attempts to validate the high diversity of dental patterns created by combinations of missing, filled, and unrestored teeth have been based on unfounded statistical assumptions. The goal of this research is to present a statistically valid method of assessing dental pattern diversity for the identification of missing individuals. Empirical observation of large reference datasets was found to be the best technique for assessing dental diversity. This technique is nearly identical to the procedure used for mitochondrial DNA casework. For the research presented in this paper, two large datasets were used, one composed of U.S. military personnel and one composed of U.S. civilians. Dental patterns were found to be very diverse on a scale that is comparable to mtDNA. In addition, it was found that the diversity values remain very consistent regardless of the level of detail present in the treatment records. Overall, combinations of missing, filled, and unrestored teeth were found to be very individualistic and an excellent source for forensic identification. C1 USA, CILHI, Cent Identificat Lab, Hickam AFB, HI 96853 USA. RP Adams, BJ (reprint author), USA, CILHI, Cent Identificat Lab, 310 Worchester Ave, Hickam AFB, HI 96853 USA. NR 22 TC 21 Z9 23 U1 0 U2 1 PU AMER SOC TESTING MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 USA SN 0022-1198 J9 J FORENSIC SCI JI J. Forensic Sci. PD MAY PY 2003 VL 48 IS 3 BP 497 EP 503 PG 7 WC Medicine, Legal SC Legal Medicine GA 674CT UT WOS:000182619800002 PM 12762516 ER PT J AU Wells, SR Hess, RA AF Wells, SR Hess, RA TI Multi-input/multi-output sliding mode control for a tailless fighter aircraft SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS LA English DT Article ID RECONFIGURABLE FLIGHT CONTROL; VARIABLE STRUCTURE CONTROL; HANDLING QUALITIES; CONTROL DESIGN; CONTROL LAW; SYSTEMS AB A frequency-domain procedure for the design of sliding mode controllers for multi-input/multi-output systems is presented. The methodology accommodates the effects of parasitic dynamics, such as those introduced by unmodeled actuators through the introduction of multiple asymptotic observers and model reference hedging. The design procedure includes a frequency-domain approach to specify the sliding manifold, the observer eigenvalues, and the hedge model. The procedure is applied to the development of a flight-control system for a linear model of the Innovative Control Effector fighter aircraft. The stability and performance robustness of the resulting design is demonstrated through the introduction of significant degradation in the control effector actuators and variation in vehicle dynamics. C1 Univ Calif Davis, Dept Mech & Aeronaut Engn, Davis, CA 95616 USA. RP USAF Acad, Dept Aeronaut, Colorado Springs, CO 80840 USA. NR 38 TC 30 Z9 32 U1 1 U2 6 PU AMER INST AERONAUTICS ASTRONAUTICS PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0731-5090 EI 1533-3884 J9 J GUID CONTROL DYNAM JI J. Guid. Control Dyn. PD MAY-JUN PY 2003 VL 26 IS 3 BP 463 EP 473 DI 10.2514/2.5084 PG 11 WC Engineering, Aerospace; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA 677UB UT WOS:000182825100009 ER PT J AU Haugan, T Wong-Ng, W Cook, LP Vaudin, MD Swartzendruber, L Barnes, PN AF Haugan, T Wong-Ng, W Cook, LP Vaudin, MD Swartzendruber, L Barnes, PN TI Partial melt processing of solid-solution Bi2Sr2CaCu2O8+delta thick-film conductors with nanophase Al2O3 additions SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID CRITICAL-CURRENT-DENSITY; CA-CU-O; SUPERCONDUCTING WHISKERS; CRYSTALLOGRAPHIC TEXTURE; GROWTH-MECHANISM; SINGLE-CRYSTALS; TAPES; ALUMINA; PHASE; TEMPERATURE AB Partial-melt processing of Bi2+xSr2-x-yCa1+yCu2O8+delta (Bi-2212) thick-film conductors with additions of nanophase Al2O3 was studied for dual purposes of increasing flux pinning and inhibiting Sr-Ca-Cu-O phase defect formation. Nanophase Al2O3 (<50% mole fraction) was added to Bi:Sr:Ca:Cu:O powders with four different compositions: three with Bi:Cu approximately 2:2 and one (Bi2Sr2.38Ca1.15Cu2.92O9.7+delta closer to the ideal Bi-2223 composition. The effect of Al2O3 addition on film microstructural and superconducting properties was studied for a range of partial-melt temperatures (865 to 900 degreesC). Results were compared to Al2O3-free films with compositions lying within the single-phase solid-solution 2212 region. Nanophase Al2O3 reacted with 2212-type precursors to form a composite of micron size or smaller particles of solid-solution (Sr,Ca)(3)Al2O6 in a solid-solution 2212 superconducting matrix. The Ca content of the (Sr,Ca)(3)Al2O6 particles formed approximated that of the 2212 precursor (less than or equal to6% mole fraction difference). Addition of 6-25% volume fraction of (Sr,Ca)(3)Al2O6 to Bi-2212 (by reaction between Al2O3 and Bi-2212) only slightly reduced superconducting transition temperatures and c-axis texturing; however this addition improved film quality by reducing Sr-Ca-Cu-O defect volume fraction by factors of 2 to 6 and significantly increased the critical current density by over one order of magnitude for 0 to 2 T applied fields at 20 to 30 K. C1 Natl Inst Stand & Technol, Mat Sci & Engn Lab, Gaithersburg, MD 20899 USA. USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA. RP Haugan, T (reprint author), Natl Inst Stand & Technol, Mat Sci & Engn Lab, 100 Bur Dr,Stop 8520, Gaithersburg, MD 20899 USA. NR 52 TC 1 Z9 1 U1 0 U2 1 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD MAY PY 2003 VL 18 IS 5 BP 1054 EP 1066 DI 10.1557/JMR.2003.0146 PG 13 WC Materials Science, Multidisciplinary SC Materials Science GA 673NG UT WOS:000182586600007 ER PT J AU Cruz, L Argyle, JC Wong, K AF Cruz, L Argyle, JC Wong, K TI Moebius syndrome with ptosis, absent facial expression. Cranial nerve VI/VII palsies with facial, abducens and hypoglossal nuclei pathology. SO JOURNAL OF NEUROPATHOLOGY AND EXPERIMENTAL NEUROLOGY LA English DT Meeting Abstract CT 79th Annual Meeting of the American-Association-of-Neuropathologists CY JUN 19-22, 2003 CL ORLANDO, FLORIDA SP Amer Assoc Neuropatholgists C1 Armed Forces Inst Pathol, Dept Neuropathol, Washington, DC 20306 USA. Dept Pathol, Elmendorf AFB, AK USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER ASSN NEUROPATHOLOGISTS INC PI LAWRENCE PA 1041 NEW HAMPSHIRE ST, LAWRENCE, KS 66044 USA SN 0022-3069 J9 J NEUROPATH EXP NEUR JI J. Neuropathol. Exp. Neurol. PD MAY PY 2003 VL 62 IS 5 MA 86 BP 559 EP 559 PG 1 WC Clinical Neurology; Neurosciences; Pathology SC Neurosciences & Neurology; Pathology GA 680CQ UT WOS:000182959100097 ER PT J AU Miracle, DB Senkov, ON AF Miracle, DB Senkov, ON TI A geometric model for atomic configurations in amorphous Al alloys SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article ID METALLIC-GLASS FORMATION; MEDIUM-RANGE ORDER; X-RAY-SCATTERING; STRUCTURAL MODEL; FORMING ABILITY; RANDOM PACKING; AL90FEXCE10-X; SIMULATION; SPHERES AB A representative model for the atomic structure of amorphous Al alloys is proposed based on the fundamental structure-forming principle of high packing efficiency, topological concepts, and available partial and total radial distribution functions from diffraction studies. Selection of rare earth (RE)-centered atomic clusters as representative structural elements in this model is supported by the large coordination number (similar to17 +/- 2), efficient atomic packing (100 +/- 5%), and small mean intersolute spacing (similar to2 atom diameters center-to-center) associated with RE solutes in amorphous Al alloys. Using Al-Y and Al-Y-Ni alloys as a base, five idealized Y-centered clusters and two Ni-centered clusters are described with specific atomic configurations that are consistent with the observed coordination numbers and high density relative to crystalline alloys of the same composition. Significant configurational complexity, required for an amorphous structure, is offered by this structural model. A distribution in Y-Y intersolute spacing is provided by the model that is consistent with the expectation of a random distribution of Y atoms. Topological similarities with other amorphous metal alloy systems suggest that the structure described here for amorphous Al may also be relevant for many other amorphous metals with marginal glass-forming ability (critical cooling rate greater than or equal to 1000 K/s), including alloys based on Mg, Fe, Ni and Co. (C) 2003 Elsevier Science B.V. All rights reserved. C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Universal Energy Syst Inc, Dayton, OH 45432 USA. RP USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. EM daniel.miracle@wpafb.af.mil RI Senkov, Oleg/C-7197-2012 OI Senkov, Oleg/0000-0001-5587-415X NR 39 TC 47 Z9 48 U1 2 U2 16 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 EI 1873-4812 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD MAY 1 PY 2003 VL 319 IS 1-2 BP 174 EP 191 DI 10.1016/S0022-3093(02)01917-8 PG 18 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA 668NG UT WOS:000182299600017 ER PT J AU Chen, JK Beraun, JE AF Chen, JK Beraun, JE TI Modelling of ultrashort laser ablation of gold films in vacuum SO JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS LA English DT Article DE ultrashort-pulse laser; material ablation; phase explosion; superheating; two-step heating ID PHASE EXPLOSION; HEAT-TRANSFER; METAL-FILMS; SIMULATION; TEMPERATURE; SILICON; SOLIDS; MATTER; PULSES AB Based on the concept of phase explosion, an enthalpy form of the two-step heating equations is proposed to model the superheating and material ablation of metals caused by ultrashort-pulse lasers. Numerical calculation of the electron and lattice temperatures is performed for gold films heated by a sub-picosecond UV laser in vacuum. When the lattice temperature at a material point equals 0.9T(tc) (T-tc denoting the thermodynamic equilibrium critical temperature), phase explosion is assumed and that material point is removed. The calculated ablation depth matches well with experimental data. C1 USAF, Res Lab, Laser Effects Res Branch, Directed Energy Directorate, Kirtland AFB, NM 87117 USA. RP Chen, JK (reprint author), USAF, Res Lab, Laser Effects Res Branch, Directed Energy Directorate, Kirtland AFB, NM 87117 USA. NR 35 TC 50 Z9 55 U1 4 U2 12 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1464-4258 J9 J OPT A-PURE APPL OP JI J. Opt. A-Pure Appl. Opt. PD MAY PY 2003 VL 5 IS 3 BP 168 EP 173 AR PII S1464-4258(03)55353-3 DI 10.1088/1464-4258/5/3/304 PG 6 WC Optics SC Optics GA 684CH UT WOS:000183187500007 ER PT J AU Ouellette, AL Slack, CL AF Ouellette, AL Slack, CL TI Shrapnel-induced sialolith - A rare etiology for sialadenitis: Case report SO JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY LA English DT Article C1 USAF, David Grant Med Ctr, Dept Oral & Maxillofacial Surg, Travis AFB, CA 94535 USA. USAF, David Grant Med Ctr, Dept Otorhinolaryngol Head & Neck Surg, Travis AFB, CA 94535 USA. RP Ouellette, AL (reprint author), USAF, David Grant Med Ctr, Dept Oral & Maxillofacial Surg, 60 MDG-SGDDS,101 Bodin Circle, Travis AFB, CA 94535 USA. NR 5 TC 3 Z9 3 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 USA SN 0278-2391 J9 J ORAL MAXIL SURG JI J. Oral Maxillofac. Surg. PD MAY PY 2003 VL 61 IS 5 BP 636 EP 637 DI 10.1053/joms.2003.50123 PG 2 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA 675AB UT WOS:000182669800018 PM 12730847 ER PT J AU Childs, JD Fritz, JM Piva, SR Erhard, RE AF Childs, JD Fritz, JM Piva, SR Erhard, RE TI Clinical decision making in the identification of patients likely to benefit from spinal manipulation: A traditional versus an evidence-based approach SO JOURNAL OF ORTHOPAEDIC & SPORTS PHYSICAL THERAPY LA English DT Article ID LOW-BACK-PAIN; FEAR-AVOIDANCE BELIEFS; ROENTGEN STEREOPHOTOGRAMMETRIC ANALYSIS; MULTICENTER INTERTESTER RELIABILITY; SACROILIAC JOINT DYSFUNCTION; PHYSICAL-EXAMINATION; RADIOSTEREOMETRIC ANALYSIS; INTEREXAMINER RELIABILITY; CENTRALIZATION PHENOMENON; CLASSIFICATION APPROACH C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. Univ Pittsburgh, Dept Phys Therapy, Sch Hlth & Rehabil Sci, Pittsburgh, PA USA. Univ Pittsburgh, Med Ctr, Spine Specialty Ctr, Pittsburgh, PA USA. RP Childs, JD (reprint author), 508 Thurber Dr, Schertz, TX 78154 USA. NR 96 TC 15 Z9 15 U1 0 U2 2 PU J O S P T, ALLIANCE GROUP COMMUNICATIONS PI LAWRENCE PA 810 EAST 10TH ST, PO BOX 1897, LAWRENCE, KS 66044-8897 USA SN 0190-6011 J9 J ORTHOP SPORT PHYS JI J. Orthop. Sports Phys. Ther. PD MAY PY 2003 VL 33 IS 5 BP 259 EP 272 PG 14 WC Orthopedics; Rehabilitation; Sport Sciences SC Orthopedics; Rehabilitation; Sport Sciences GA 702GX UT WOS:000184217100005 PM 12775000 ER PT J AU Conner, KA Sabatini, R Mealey, BL Takacs, VJ Mills, MP Cochran, DL AF Conner, KA Sabatini, R Mealey, BL Takacs, VJ Mills, MP Cochran, DL TI Guided bone regeneration around titanium plasma-sprayed, acid-etched, and hydroxyapatite-coated implants in the canine model SO JOURNAL OF PERIODONTOLOGY LA English DT Article DE animal studies; dental implants; follow-up studies; guided bone regeneration; hydroxyapatite/therapeutic use; membranes, artificial, membranes, barrier; polytetrafluoroethylene/therapeutic use; titanium ID FREEZE-DRIED BONE; COMMERCIALLY PURE TITANIUM; DENTAL IMPLANTS; MINIATURE PIGS; HISTOLOGIC EVALUATION; EXTRACTION SOCKETS; ALLOGRAFT; DOGS; INTERFACE; SURFACE AB Background: Endosseous dental implants with rough surfaces have been designed to improve early healing, especially in areas of poor bone or insufficient bone quantity. The aim of this study was to histomorphometrically assess the bone-to-implant contact on 3 different rough-surfaced implants following guided bone regeneration. Methods: Mandibular premolars and first molars were extracted in 12 dogs, and healing was allowed for 6 months. Six implant osteotomy sites were prepared, 3 per side, followed by the creation of 7.3 mm wide by 5 mm deep surgical defects in the coronal section of the osteotomy sites. Ten-mm long titanium screw-type implants with titanium plasma-sprayed (TPS), hydroxyapatite-coated (HA), or acid-etched (AE) surfaces were placed; the surrounding defects were filled with canine demineralized freeze-dried bone allograft; implants/grafts were covered with expanded polytetrafluoroethylene membranes; and the tissue was closed. Following a healing period of 4 months, the animals were sacrificed and mandibular blocks were harvested for histomorphometric analysis. Results: The mean percentage of bone-to-implant contact in the defect and non-defect areas for the different implant surfaces was: AE 16.24% defect, and 28.78% non-defect; TPS 25.08% defect, and 16.96% non-defect; and HA 48.25% defect and 26.60% non-defect. Within the defect, the mean difference in the bone-to-implant contact was significant for HA compared to TPS (P <0.0001) and HA versus AE (P <0.0001); TPS versus AE was not significant (P = 0.063). In the non-defect areas, the mean difference in the bone-to-implant contact was significant for AE versus TPS (P = 0.010); all other comparisons were not significant. There were 18 membrane exposures in the 72 implant sites. Data were analyzed again to assess the impact of membrane complications. Using a 1-way analysis of variance, the bone-to-implant contact was compared between the sites with and without membrane complications. No significant differences were seen in the defect areas or in the non-defect areas between the sites with and without membrane complications. Conclusion: In this study, the bone-to-implant contact in regenerated bone was greatest when an HA-coated implant was used. C1 Dept Periodont, Misawa, Japan. Wilford Hall USAF Med Ctr, Dept Periodont, Lackland AFB, TX USA. Univ Texas, Hlth Sci Ctr, Dept Periodont, San Antonio, TX 78284 USA. RP Mealey, BL (reprint author), MRDT, Dept Periodont, 59DS,2450 Pepperrell St, Lackland AFB, TX 78236 USA. NR 56 TC 17 Z9 17 U1 0 U2 3 PU AMER ACAD PERIODONTOLOGY PI CHICAGO PA 737 NORTH MICHIGAN AVENUE, SUITE 800, CHICAGO, IL 60611-2690 USA SN 0022-3492 J9 J PERIODONTOL JI J. Periodont. PD MAY PY 2003 VL 74 IS 5 BP 658 EP 668 DI 10.1902/jop.2003.74.5.658 PG 11 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA 754KG UT WOS:000187315000013 PM 12816298 ER PT J AU Zhang, T Park, SY Farmer, BL Interrante, LV AF Zhang, T Park, SY Farmer, BL Interrante, LV TI Synthesis of comb-type polycarbosilanes via nucleophilic substitution reactions on the main-chain silicon atoms (vol 41, pg 984, 2003) SO JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY LA English DT Correction C1 Rensselaer Polytech Inst, Dept Chem, Troy, NY 12180 USA. Rensselaer Polytech Inst, NY State Ctr Polymer Synthesis, Troy, NY 12180 USA. Kyungpook Natl Univ, Dept Polymer Sci, Buk Gu, Taegu 702701, South Korea. USAF, Res Lab, MLBP, Wright Patterson AFB, OH USA. RP Zhang, T (reprint author), Rensselaer Polytech Inst, Dept Chem, Troy, NY 12180 USA. NR 1 TC 1 Z9 1 U1 0 U2 0 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0887-624X J9 J POLYM SCI POL CHEM JI J. Polym. Sci. Pol. Chem. PD MAY 1 PY 2003 VL 41 IS 9 BP 1411 EP 1411 DI 10.1002/pola.1337 PG 1 WC Polymer Science SC Polymer Science GA 665HU UT WOS:000182114700024 ER PT J AU Branam, R Mayer, W AF Branam, R Mayer, W TI Characterization of cryogenic injection at Supercritical pressure SO JOURNAL OF PROPULSION AND POWER LA English DT Article; Proceedings Paper CT AIAA/ASME/SAE/ASEE 37th Joint Propulsion Conference CY JUL 08-11, 2001 CL SALT LAKE CITY, UTAH SP Amer Inst Aeronaut & Astronaut, ASME, SAE, ASEE ID SHEAR-LAYER AB This project looks at injection processes of a dense jet simulating oxygen core flow with nitrogen of a coaxial injector used in cryogenic rocket engines. The rocket engine performance is highly dependent on the injection processes such as mixing and jet dissipation of propellants in the supercritical regime. Experimental data at various temperatures and injection velocities taken by Raman imaging and Shadowgraphy were compared to computational models allowing comparisons of density, length scales and jet spreading angles providing insight into mass mixing and jet dissipation. The Raman results are a direct result of the high density gradients and agree well with the expected trend of the computational models but absolute values were 10-25% below expected maximum values in the highest density regions. The jet spreading angle investigation uses several different measuring methods showing agreement with earlier empirical models as well as the computational results. The length scale measurements resulting from the two-point correlation method correspond to calculated Taylor microscales in the developed flowfield. Of the various testing conditions investigated, temperature change proves to affect the jet behavior the most, and in some instances completely changes the character of the jet dissipation and break up. C1 German Aerosp Ctr Lampoldshausen, Prop Inject Res Grp, D-74239 Hardthausen K, Germany. RP Branam, R (reprint author), USAF, Res Lab, Edwards AFB, CA 93523 USA. NR 22 TC 29 Z9 32 U1 1 U2 10 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD MAY-JUN PY 2003 VL 19 IS 3 BP 342 EP 355 DI 10.2514/2.6138 PG 14 WC Engineering, Aerospace SC Engineering GA 681KZ UT WOS:000183036500003 ER PT J AU Numbers, K Hamed, A AF Numbers, K Hamed, A TI Conservation coupling technique for dynamic inlet-engine analyses SO JOURNAL OF PROPULSION AND POWER LA English DT Article AB A hybrid method is presented for unsteady analysis of turbine engine propulsion systems. The method is a coupled analysis of the inlet-engine combination, incorporating multidimensional inviscid computational fluid dynamics in the inlet with a one-dimensional dynamic turbomachinery model. The domain coupling technique consists of conservation averaging, which reconciles the dimensional inconsistency and characteristic wave propagation to provide time accuracy. The method is applied to an axisymmetric mixed compression inlet integrated with an eight-stage axial compressor at Mach 2.5 operating conditions. Analysis includes methodology verification, steady-state performance, and dynamic results for two different events. The results indicate that the method is capable of simulating large-amplitude dynamic behavior of coupled supersonic inlet-engine systems. C1 USAF, Res Lab, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA. Univ Cincinnati, Dept Aerosp Engn, Cincinnati, OH 45221 USA. RP Numbers, K (reprint author), USAF, Res Lab, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA. NR 17 TC 5 Z9 5 U1 0 U2 3 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD MAY-JUN PY 2003 VL 19 IS 3 BP 444 EP 455 DI 10.2514/2.6128 PG 12 WC Engineering, Aerospace SC Engineering GA 681KZ UT WOS:000183036500014 ER PT J AU Calhoun, BC Napolitano, P Terry, M Bussey, C Hoeldtke, NJ AF Calhoun, BC Napolitano, P Terry, M Bussey, C Hoeldtke, NJ TI Comprehensive care for the family of the fetus with a lethal condition SO JOURNAL OF REPRODUCTIVE MEDICINE LA English DT Article DE perinatal care; hospice care; fetal death AB OBJECTIVE: To describe our experience in providing a program of structured interdisciplinary care for the families of fetuses prenatally diagnosed with a lethal congenital anomaly. STUDY DESIGN: We developed a comprehensive "perinatal hospice" program for the supportive care of families with fetuses known to have a lethal condition. Upon prenatal diagnosis of a lethal fetal condition, parents were presented with the option of elective pregnancy termination versus a multi-disciplinary program of ongoing supportive care until the time of spontaneous labor or until delivery was required for obstetric indications. We evaluated patient use of this new service and the natural history of pregnancies managed in this fashion. RESULTS: The population consisted of 33 patients carrying a fetus with a clearly delineated lethal anomaly. Twenty-eight (85%) chose to participate in the perinatal hospice program. Of these, 11/28 (39%) had an intrauterine fetal death and 17/28 (61%) delivered a live-born infant. Among the live-born infants were 12 vaginal deliveries, 4 preterm and 8 at term. Obstetric indications or maternal request resulted in cesarean delivery for 5/28 (18%), 4 preterm and 1 at term, all live born. All live-born infants died within 20 minutes to 2 months. There were no maternal complications. CONCLUSION: The availability of a structured program providing ongoing, comprehensive, multidisciplinary, supportive perinatal care offers a tangible and safe alternative to early elective pregnancy termination for patients carrying a fetus with a lethal congenital condition. C1 USAF, Madigan Army Med Ctr, Dept Obstet & Gynecol, Tacoma, WA 98431 USA. USAF, Madigan Army Med Ctr, Dept Nursing, Tacoma, WA 98431 USA. Tripler Army Med Ctr, Dept Obstet & Gynecol, Honolulu, HI 96859 USA. RP Calhoun, BC (reprint author), USAF, Madigan Army Med Ctr, Dept Obstet & Gynecol, Tacoma, WA 98431 USA. NR 10 TC 33 Z9 34 U1 0 U2 2 PU SCI PRINTERS & PUBL INC PI ST LOUIS PA PO DRAWER 12425 8342 OLIVE BLVD, ST LOUIS, MO 63132 USA SN 0024-7758 J9 J REPROD MED JI J. Reprod. Med. PD MAY PY 2003 VL 48 IS 5 BP 343 EP 348 PG 6 WC Obstetrics & Gynecology SC Obstetrics & Gynecology GA 683VE UT WOS:000183170500008 PM 12815907 ER PT J AU Massengill, JC Sun, L Moul, JW Wu, HY McLeod, DG Amling, C Lance, R Foley, J Sexton, W Kusuda, L Chung, A Soderdahl, D Donahue, T AF Massengill, JC Sun, L Moul, JW Wu, HY McLeod, DG Amling, C Lance, R Foley, J Sexton, W Kusuda, L Chung, A Soderdahl, D Donahue, T TI Pretreatment total testosterone level predicts pathological stage in patients with localized prostate cancer treated with radical prostatectomy SO JOURNAL OF UROLOGY LA English DT Article DE testosterone; prostatic neoplasms; prostatectomy; neoplasm staging; prognosis ID SERUM HORMONE LEVELS; ANTIGEN; ADENOCARCINOMA; MODEL AB Purpose: In the last decade numerous groups have shown that low levels of pretreatment serum total testosterone consistently predict more aggressive disease, worse prognosis and worse treatment response in patients with metastatic prostate cancer. Prior studies have not demonstrated this same correlation in patients with known localized disease. We rigorously tested pretreatment total testosterone levels as a potential staging and prognostic marker in a large cohort of 879 patients with localized cancer treated with radical prostatectomy. Materials and Methods: We retrospectively reviewed the clinical records of 879 patients treated with radical prostatectomy between January 1, 1986 and June 30, 2002 from 9 hospital sites. Nonparametric tests were used to compare the relationship of pretreatment testosterone to other variables. Multivariate logistic regression analysis was used to assess clinical predictors of extraprostatic disease. Kaplan-Meier survival methods and Cox regression analysis were used to assess predictors of biochemical recurrence. Results: Patients with nonorgan confined prostate cancer (pT3-T4) showed significantly lower pretreatment total testosterone levels than those with organ confined cancer (pT1-T2) (nonparametric p = 0.041). In multivariate analysis pretreatment total testosterone emerged as a significant independent predictor of extraprostatic disease (p = 0.046). Total testosterone was not a significant predictor of biochemical (prostate specific antigen) recurrence (p = 0.467). Conclusions: Pretreatment total testosterone was an independent predictor of extraprostatic disease in patients with localized prostate cancer. As testosterone decreases patients have an increased likelihood of nonorgan confined disease. Low testosterone was not predictive of biochemical recurrence, although trends observed dictate study in larger cohorts with mature followup. C1 Uniformed Serv Univ Hlth Sci, Ctr Prostate Dis Res, Dept Surg, Rockville, MD 20852 USA. Walter Reed Army Med Ctr, Dept Surg, Urol Serv, Washington, DC 20307 USA. Madigan Army Med Ctr, Dept Surg, Tacoma, WA 98431 USA. Eisenhower Army Med Ctr, Dept Surg, Augusta, GA USA. Brooke Army Med Ctr, Dept Surg, San Antonio, TX USA. Natl Naval Med Res Inst, Dept Urol, Bethesda, MD USA. Malcolm Grow AF Med Ctr, Dept Urol, Andrews AFB, MD USA. USN, Med Ctr, Dept Urol, San Diego, CA 92152 USA. USN, Med Ctr, Dept Urol, Portsmouth, VA USA. Wilford Hall USAF Med Ctr, Dept Urol, Lackland AFB, TX 78236 USA. RP Moul, JW (reprint author), Uniformed Serv Univ Hlth Sci, Ctr Prostate Dis Res, Dept Surg, 1530 E Jefferson St, Rockville, MD 20852 USA. NR 21 TC 172 Z9 181 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0022-5347 J9 J UROLOGY JI J. Urol. PD MAY PY 2003 VL 169 IS 5 BP 1670 EP 1675 DI 10.1097/01.ju.0000062674.43964.d0 PG 6 WC Urology & Nephrology SC Urology & Nephrology GA 667WM UT WOS:000182257600005 PM 12686805 ER PT J AU Niemtzow, RC AF Niemtzow, RC TI Integration of acupuncture in clinical care: Migraines, depression, pain, arthritis, and menopausal symptoms SO JOURNAL OF WOMENS HEALTH & GENDER-BASED MEDICINE LA English DT Meeting Abstract C1 USAF, Med Corps, Malcolm Grow Med Ctr, Andrews AFB, MD USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 USA SN 1524-6094 J9 J WOMEN HEALTH GEN-B JI J. WOMENS HEALTH GENDER-BASED MED. PD MAY PY 2003 VL 12 IS 4 BP 422 EP 422 PG 1 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Obstetrics & Gynecology; Women's Studies SC Public, Environmental & Occupational Health; General & Internal Medicine; Obstetrics & Gynecology; Women's Studies GA 683JN UT WOS:000183145100042 ER PT J AU Sun, G Soref, RA AF Sun, G Soref, RA TI Si-based quantum staircase terahertz lasers SO MICROELECTRONICS JOURNAL LA English DT Article; Proceedings Paper CT Conference on Low Dimensional Structures and Devices (LDSD) CY DEC 08-13, 2002 CL FORTALEZA, BRAZIL DE SiGe/Si strain balanced superlattice; quantum staircase laser; THz laser ID LIGHT-HOLE; MASS AB Design results are presented for electrically pumped quantum staircase intersubband p-i-p SiGe/Si strain-balanced superlattice lasers to be operated at 77 K or higher. The wavelength of laser emission will be in the THz range. Two approaches of quantum staircase lasers will be presented, one utilizes the inverted light-hole effective mass, while the other inverted heavy-hole mass. Optical gain on the order of a few 100 cm(-1) can be achieved for both laser designs. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Univ Massachusetts, Dept Phys, Boston, MA 02125 USA. USAF, Res Lab, Sensors Directorate, Hanscom AFB, MA 01731 USA. RP Sun, G (reprint author), Univ Massachusetts, Dept Phys, Boston, MA 02125 USA. NR 7 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER ADVANCED TECHNOLOGY PI OXFORD PA OXFORD FULFILLMENT CENTRE THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0026-2692 J9 MICROELECTR J JI Microelectron. J. PD MAY-AUG PY 2003 VL 34 IS 5-8 BP 391 EP 393 DI 10.1016/S0026-2692(03)00032-6 PG 3 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology SC Engineering; Science & Technology - Other Topics GA 691LH UT WOS:000183607400017 ER PT J AU Waller, SG AF Waller, SG TI Untitled SO MILITARY MEDICINE LA English DT Letter C1 USAF, MC, FS, Washington, DC 20330 USA. RP Waller, SG (reprint author), USAF, MC, FS, Washington, DC 20330 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA SN 0026-4075 J9 MIL MED JI Milit. Med. PD MAY PY 2003 VL 168 IS 5 BP III EP III PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA 743AG UT WOS:000186549800002 PM 12775162 ER PT J AU Noah, DL Ostroff, SM Cropper, TL Thacker, SB AF Noah, DL Ostroff, SM Cropper, TL Thacker, SB TI US military officer participation in the Centres for Disease Control and Prevention's Epidemic Intelligence Service (1951-2001) SO MILITARY MEDICINE LA English DT Article AB The Epidemic Intelligence Service (EIS) was created in 1951 to provide epidemiologists to investigate natural and intentional disease epidemics. From an initial class of 23 U.S. citizens, the program has evolved into a globally recognized, hands-on learning experience, accepting approximately 65 to 75 new officers each year. The first U.S. military epidemic intelligence service officer (EISO) was accepted into the program in 1994. Since that time, 12 such officers have completed, or have begun, EIS training. They have comprised 2.1% of all EISOs from 1994 to 2001 and 0.47% of all EISOs. This total has included nine Air Force veterinarians, one Army veterinarian, one Army physician, and one Navy physician. Each military EISO had the opportunity to lead investigations of significant public health events (e.g., Ebola, monkeypox, malaria, Nipah virus, West Nile fever, and anthrax outbreaks). All graduates from the military returned to active duty assignments in operational medical units, research institutes, or the intelligence community. C1 US Ctr Dis Control & Prevent, Epidemiol Program Off, Atlanta, GA 30333 USA. USAF, SG, Washington, DC 20332 USA. US Ctr Dis Control & Prevent, Natl Ctr Infect Dis, Atlanta, GA 30333 USA. USAF, Res Lab Brooks, Brooks AFB, TX 78235 USA. RP Thacker, SB (reprint author), US Ctr Dis Control & Prevent, Epidemiol Program Off, 1600 Clifton Rd,Mailstop C-08, Atlanta, GA 30333 USA. NR 8 TC 2 Z9 2 U1 0 U2 1 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA SN 0026-4075 J9 MIL MED JI Milit. Med. PD MAY PY 2003 VL 168 IS 5 BP 368 EP 372 PG 5 WC Medicine, General & Internal SC General & Internal Medicine GA 743AG UT WOS:000186549800011 PM 12775171 ER PT J AU Veverka, DV Anderson, J Auld, GW Coulter, GR Kennedy, C Chapman, PL AF Veverka, DV Anderson, J Auld, GW Coulter, GR Kennedy, C Chapman, PL TI Use of the stages of change model in improving nutrition and exercise habits in enlisted Air Force men SO MILITARY MEDICINE LA English DT Article ID UNITED-STATES; DIETARY GUIDELINES; CHOLESTEROL; INTERVENTIONS; PERSONNEL; EDUCATION; PROGRAM; MEMBERS; ADULTS; FRUIT AB Thirty-nine U.S. Air Force enlisted men participated in a randomized controlled study that evaluated an experimental program designed to enhance fitness. Subjects were assigned to either a treatment (access to the program) or control (no access to program) group for 6 months. To improve treatment group fitness (as measured by VO2, subjects received individually tailored information (based on a behavior change model) via the Internet to encourage adoption of positive diet and exercise behaviors. Results showed no significant effect in improving fitness in treatment. However, significant effects were observed for secondary outcomes such as weight (controls, +1.0 kg vs. treatment, -2.2 kg, p < 0.05), body mass index (+0.3 kg/m(2) vs. -0.7 kg/m(2), p < 0.05), and percent body fat (+0.6% vs. -1.5%, p < 0.001). The data suggest that the individually tailored exercise information was not effective in encouraging sufficient exercise intensity to impact fitness. However, the dietary tailored information appears to have encouraged the adoption of more positive nutritional practices as demonstrated by the beneficial effects reflected in secondary outcomes. C1 USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA. Colorado State Univ, Dept Food Sci & Human Nutr, Ft Collins, CO 80523 USA. Colorado State Univ, Dept Microbiol, Ft Collins, CO 80523 USA. Colorado State Univ, Dept Hlth & Exercise, Ft Collins, CO 80523 USA. Colorado State Univ, Dept Stat, Ft Collins, CO 80523 USA. RP Veverka, DV (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA. NR 33 TC 19 Z9 19 U1 1 U2 4 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA SN 0026-4075 J9 MIL MED JI Milit. Med. PD MAY PY 2003 VL 168 IS 5 BP 373 EP 379 PG 7 WC Medicine, General & Internal SC General & Internal Medicine GA 743AG UT WOS:000186549800012 PM 12775172 ER PT J AU Kharoufeh, JP AF Kharoufeh, JP TI Explicit results for wear processes in a Markovian environment SO OPERATIONS RESEARCH LETTERS LA English DT Article DE failure time; wear process; random environment ID SHOCK-MODELS; NUMERICAL INVERSION; LAPLACE TRANSFORMS; REPLACEMENT; SYSTEM AB We consider the reliability of a single-unit system whose cumulative damage over time is a continuous wear process {X(t): t greater than or equal to 0} that depends on an external environment process {Z(t): t greater than or equal to 0}, We explicitly derive the failure time distribution and moments in terms of Laplace-Stieltjes transforms by analyzing the Markov additive process {(X(t),Z(t)): t greater than or equal to 0} and demonstrate its applicability on an example problem. Published by Elsevier Science B.V. C1 USAF, Inst Technol, Dept Operat Sci, Wright Patterson AFB, OH 45433 USA. RP USAF, Inst Technol, Dept Operat Sci, 2950 P St,AFIT-ENS, Wright Patterson AFB, OH 45433 USA. EM jeffrey.kharoufeh@afit.edu NR 17 TC 40 Z9 42 U1 1 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-6377 EI 1872-7468 J9 OPER RES LETT JI Oper. Res. Lett. PD MAY PY 2003 VL 31 IS 3 BP 237 EP 244 AR PII S0167-6377(02)00229-8 DI 10.1016/S0167-6377(02)00229-8 PG 8 WC Operations Research & Management Science SC Operations Research & Management Science GA 664YX UT WOS:000182093800011 ER PT J AU Brietzke, SE Mair, EA AF Brietzke, SE Mair, EA TI Injection snoreplasty: Extended follow-up and new objective data SO OTOLARYNGOLOGY-HEAD AND NECK SURGERY LA English DT Article ID LASER-ASSISTED UVULOPALATOPLASTY; OBSTRUCTIVE SLEEP-APNEA; SHORT-TERM; UVULOPALATOPHARYNGOPLASTY; PALATE AB OBJECTIVE: Injection snoreplasty was recently introduced as a safe, effective, and minimally invasive treatment for primary snoring. Extended follow-up data (19 months) are presented from the initial pilot study cohort, and pretreatment/posttreatment objective data are presented on a new prospective patient cohort. STUDY DESIGN AND SETTING: The successfully treated patients from the initial pilot study (n = 25) were surveyed regarding their current snoring level, overall discomfort, and overall satisfaction. A new patient cohort with primary snoring (Respiratory Disturbance Index < 10) was prospectively treated with injection snoreplasty. Snoring was objectively measured pretreatment and posttreatment using a take-home acoustical analysis device. RESULTS: Subjective success dropped from 92% to 75% at a mean of 19-month follow-up with a snoring relapse rate of 18%. Objective analysis of a new patient cohort (n = 17) confirmed statistically significant decreases in palatal flutter snoring and palatal loudness after injection. Preprocedure measurements were highly correlated to eventual treatment success. CONCLUSIONS AND SIGNIFICANCE: Success and snoring relapse rates of injection snoreplasty are similar to those of other current treatments. Objective analysis confirms the procedure is effective in reducing palatal flutter snoring. Preprocedure snoring analysis may predict patient response to palatal stiffening treatments. C1 Walter Reed Army Med Ctr, Dept Otorhinolaryngol Head & Neck Surg, Washington, DC 20307 USA. RP Mair, EA (reprint author), Wilford Hall USAF Med Ctr, Dept Otolaryngol, 2200 Bergquist Dr,Suite 1, San Antonio, TX 78236 USA. NR 20 TC 33 Z9 34 U1 0 U2 3 PU MOSBY, INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 USA SN 0194-5998 J9 OTOLARYNG HEAD NECK JI Otolaryngol. Head Neck Surg. PD MAY PY 2003 VL 128 IS 5 BP 605 EP 615 DI 10.1016/S0197-5998(03)00229-8 PG 11 WC Otorhinolaryngology; Surgery SC Otorhinolaryngology; Surgery GA 682MQ UT WOS:000183096200001 PM 12748553 ER PT J AU Kuo, SP Lee, SH Bivolaru, D Kossey, P Lee, MC Riddolls, RJ Jastrzebski, P Sentman, D AF Kuo, SP Lee, SH Bivolaru, D Kossey, P Lee, MC Riddolls, RJ Jastrzebski, P Sentman, D TI Experimental and numerical studies on ELF/VLF wave generation by amplitude-modulated HF heating waves SO PHYSICA SCRIPTA LA English DT Article ID IONOSPHERIC MODIFICATION EXPERIMENTS; POLAR ELECTROJET; THERMAL-INSTABILITY; VLF WAVES; AURORAL ELECTROJET; ELF RADIATION; REGION; TROMSO; POWER AB Modulation of electrojet currents by amplitude-modulated HF heating waves creates ionospheric antenna currents to generate ELF/VLF waves. The dependence of the generation efficiency on the HF heating wave modulation scheme and frequency is studied experimentally and numerically. Three heating wave modulation schemes: (1) rectangular wave, (2) sine wave, and (3) half-wave rectified wave are examined. The experimental results show that the half-wave rectified wave modulation scheme is the most efficient one to generate signals at the modulation frequency and its second harmonic. corroborating theoretical predictions. The equations modeling the radiation process and experimental measurements include the contribution from the near field, in addition to the far field. of the antenna current and the resonant effect on the wave intensity generated in the resonator formed by the conducting ground and the plasma layer in the lower ionosphere. The numerically calculated dependency of the radiation intensity on the modulation frequency is shown in good agreement with that measured experimentally for all three modulation-schemes. C1 Polytech Univ, Dept Elect & Comp Engn, Brooklyn, NY 11201 USA. USAF, Res Lab, AFRL, VSBI, Hanscom AFB, MA 01731 USA. MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA. Univ Alaska, Inst Geophys, Fairbanks, AK 99775 USA. RP Kuo, SP (reprint author), Polytech Univ, Dept Elect & Comp Engn, 6 Metrotech Ctr, Brooklyn, NY 11201 USA. NR 25 TC 12 Z9 12 U1 0 U2 0 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PD MAY PY 2003 VL 67 IS 5 BP 448 EP 452 DI 10.1238/Physica.Regular.067a00448 PG 5 WC Physics, Multidisciplinary SC Physics GA 683NC UT WOS:000183154800016 ER PT J AU Dalrymple, NE Bianda, M Wiborg, PH AF Dalrymple, NE Bianda, M Wiborg, PH TI Fast flat fields from scanning extended sources SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC LA English DT Article AB A fast flat-fielding algorithm is presented that uses two orthogonal constant-speed scans of an image across a detector to compute a flat field. Each scan image calibrates the cross-scan direction of the other. Results from the ISOON solar telescope are presented. For a camera with pixels, the computation 2048 x 2048 requires 30 s of processing time and yields a result that is comparable to a Kuhn-Lin flat field, which requires 1 hr of processing time on the same system. The total system photometric accuracy using the fast method is about 1%. The method has been tested for full-disk and high-resolution solar imaging. C1 USAF, Res Lab, Space Vehicles Directorate, Natl Solar Observ, Sunspot, NM 88349 USA. IRSOL, CH-6605 Locarno, Switzerland. RP Dalrymple, NE (reprint author), USAF, Res Lab, Space Vehicles Directorate, Natl Solar Observ, Sunspot, NM 88349 USA. NR 3 TC 8 Z9 8 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6280 J9 PUBL ASTRON SOC PAC JI Publ. Astron. Soc. Pac. PD MAY PY 2003 VL 115 IS 807 BP 628 EP 634 DI 10.1086/374725 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 669VV UT WOS:000182371900007 ER PT J AU Feinstein, JA O'Brien, K AF Feinstein, JA O'Brien, K TI Acute metabolic decompensation in an adult patient with isovaleric acidemia SO SOUTHERN MEDICAL JOURNAL LA English DT Article ID L-CARNITINE; GLYCINE THERAPY AB Isovaleric acidemia is a rare autosomal recessive inborn error of leucine catabolism caused by deficiency of isovaleryl coenzyme A dehydrogenase. This enzymatic deficiency leads to severe metabolic derangement, manifested clinically as vomiting, dehydration, and acidosis progressing to seizures, coma, and death. The two phenotypic expressions are the acute severe and the chronic intermittent form. The acute severe phenotype typically results in death during early infancy, whereas patients with the chronic intermittent form are asymptomatic at baseline but have episodes of acute metabolic decompensation, usually in the setting of infection, physical exertion, or ingestion of protein-rich food. This case illustrates how inborn errors of metabolism resulting in organic acidemia can be manifested in adults and why the internist needs to be aware of them. C1 Wilford Hall USAF Med Ctr, Dept Internal Med, Lackland AFB, TX 78236 USA. RP Feinstein, JA (reprint author), Dept Rheumatol, 220 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA. NR 21 TC 4 Z9 4 U1 0 U2 2 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0038-4348 J9 SOUTH MED J JI South.Med.J. PD MAY PY 2003 VL 96 IS 5 BP 500 EP 503 DI 10.1097/01.SMJ.0000051141.03668.1D PG 4 WC Medicine, General & Internal SC General & Internal Medicine GA 681XP UT WOS:000183061100017 PM 12911192 ER PT J AU Coleman, CA Hull, BE McDougal, JN Rogers, JV AF Coleman, CA Hull, BE McDougal, JN Rogers, JV TI The effect of m-xylene on cytotoxicity and cellular antioxidant status in rat dermal equivalents SO TOXICOLOGY LETTERS LA English DT Article DE skin; irritation; m-xylene; dermal equivalent; N-acetylcysteine; catalase ID HUMAN-SKIN FIBROBLASTS; PROTEIN SH-GROUPS; IN-VITRO TESTS; OXIDATIVE STRESS; HYDROGEN-PEROXIDE; CONTACT HYPERSENSITIVITY; CULTURED FIBROBLASTS; VISIBLE RADIATIONS; LIPID-PEROXIDATION; N-ACETYLCYSTEINE AB Exposure of the skin to volatile organic chemicals (VOCs) can lead to irritation, inflammation and cytotoxicity. Since VOCs are used in industrial, commercial and military applications, concern is mounting with respect to VOC safe exposure limits. Although traditional toxicological assessment of VOCs has utilized animal models, the use of alternative in vitro models is becoming more widespread. We have previously developed a sealed exposure system that prevents chemical loss through evaporation and enables calculation of target cell chemical dose. The present study utilized this in vitro exposure method to assess m-xylene-induced cytotoxicity and antioxidant status in dermal equivalents (dermal fibroblasts in a collagen matrix). At the end of a 1- or 4-h exposure, cytotoxicity was measured using the MTT assay and the EC50 values determined were 1481 +/- 88 and 930 +/- 33, respectively. Decreases in cellular thiols and catalase activity were observed, which occurred in a time and dose-dependent manner. Treatment of dermal equivalents with the antioxidants N-acetylcysteine (NAC) and catalase provided some protection against m-xylene-induced cytotoxicity. When compared to m-xylene exposures, treatment with either 1.0 or 5.0 mM NAC led to increases in the EC50 values at 1 and 4 h. Increases in these EC50 values ranged from 1.22- to 1.32-fold at 1 h and 1.27- to 1.54-fold at 4 h. Although treatment with catalase (1000 U/ml) led to a 1.35-fold increase in cell viability at 1 h, no significant differences were observed at either 1 or 4 h when compared to dermal equivalents exposed to m-xylene alone. These results suggest that exposure to m-xylene leads to a time- and dose-dependent decrease in cellular antioxidants and that cellular thiols may provide protection against the cytotoxic properties of m-xylene. (C) 2003 Elsevier Science Ireland Ltd. All rights reserved. C1 Geoctr, Wright Patterson AFB, OH 45433 USA. ManTech, Wright Patterson AFB, OH 45433 USA. Wright State Univ, Dept Biol Sci, Dayton, OH 45435 USA. Wright State Univ, Sch Med, Dept Pharmacol & Toxicol, Dayton, OH 45435 USA. RP Rogers, JV (reprint author), Geoctr, 2856 G St,Bldg 79, Wright Patterson AFB, OH 45433 USA. FU NIOSH CDC HHS [R01 OH354-03] NR 54 TC 16 Z9 16 U1 0 U2 2 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0378-4274 J9 TOXICOL LETT JI Toxicol. Lett. PD APR 30 PY 2003 VL 142 IS 1-2 BP 133 EP 142 AR PII S0378-4274(03)00020-1 DI 10.1016/S0378-4274(03)00020-1 PG 10 WC Toxicology SC Toxicology GA 668KY UT WOS:000182290900015 PM 12765247 ER PT J AU Miracle, DB Senkov, ON AF Miracle, DB Senkov, ON TI Topological criterion for metallic glass formation SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE amorphous materials-metallic glasses; theory and modeling-structural behavior ID ALLOYS AB A topological model is proposed for metallic glass formation through destabilization of the host crystalline lattice by substitutional and/or interstitial solute elements. A solute element may partition between substitutional and interstitial sites and the model calculates relative site frequency as a function of the strain energy associated with each site. The strain energy, in turn, depends upon solute and solvent elastic properties and relative sizes, and upon temperature. The crystalline lattice is destabilized leading to amorphization when solute elements produce a critical internal strain required to change local coordination numbers. Fractions of solute atoms in interstitial and substitutional sites and the internal strain introduced by these atoms are calculated as functions of atomic radii and elastic moduli of solvent and solute elements and the absolute temperature. The critical concentration of a solute element required to destabilize the crystalline lattice of a binary alloy is also calculated as a function of the radius ratio R = R-B/R-A of the solute and solvent elements. In the range of 0.5 < R < 1, the critical concentration decreases, reaches a minimum at R similar to 0.8 and then increases as the size of the solute element decreases relative to the solvent. (C) 2002 Elsevier Science B.V. All rights reserved. C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Universal Energy Syst Inc, Dayton, OH 45432 USA. RP Senkov, ON (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. RI Senkov, Oleg/C-7197-2012 OI Senkov, Oleg/0000-0001-5587-415X NR 15 TC 60 Z9 64 U1 0 U2 17 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD APR 25 PY 2003 VL 347 IS 1-2 BP 50 EP 58 AR PII S0921-5093(02)00579-8 DI 10.1016/S0921-5093(02)00579-8 PG 9 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 647WE UT WOS:000181116400007 ER PT J AU Kelley, MC Kruschwitz, CA Gardner, CS Drummond, JD Kane, TJ AF Kelley, MC Kruschwitz, CA Gardner, CS Drummond, JD Kane, TJ TI Mesospheric turbulence measurements from persistent Leonid meteor train observations SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article DE shear instability; turbopause; eddy diffusion ID DENSITY-FLUCTUATIONS; DISSIPATION; ADVECTION; SHOWER; LIDAR AB Long-duration meteor trains have fascinated observers for many years. The great Leonid meteor storms of 1866-1888 were the first to spark organized scientific study on the subject, but despite years of study, more than a century later, persistent trains remain for the most part a mystery. Over the last few years, however, the heightened Leonid activity has fueled considerable research efforts, much of it dealing with persistent trains. Some of the results of a comprehensive study of persistent trains conducted at the Starfire Optical Range (SOR) on Kirtland Air Force Base, New Mexico, during the 1998 and 1999 Leonid showers are reported here. For the first time the time evolution of persistent trains is used to determine the eddy diffusion coefficient at mesospheric heights. In three of the four trains studied, portions of the train exhibited molecular diffusion while the remainder of the train, as well as the entire fourth train, exhibited eddy diffusion. The eddy diffusion coefficients were several hundred m(2) s(-1), two orders of magnitude higher than the molecular rates. The sodium density in the train was sufficient to use it as a passive scalar tracer of turbulent fluctuations. The spectra are well modeled by the Heisenberg turbulence model, and the values found for the energy dissipation rate are in agreement with the eddy diffusion coefficient estimates. The gradient Richardson number and Brunt-Vaisalla frequency were determined from lidar measurements and indicated regions of convective and dynamic instability. C1 Cornell Univ, Sch Elect & Comp Engn, Ithaca, NY 14853 USA. Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA. USAF, Res Lab, Starfire Opt Range, Directed Energy Directorate, Kirtland AFB, NM USA. Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA. RP Kelley, MC (reprint author), Cornell Univ, Sch Elect & Comp Engn, 304 Rhodes Hall, Ithaca, NY 14853 USA. EM mikek@ee.cornell.edu; craigk@ece.cornell.edu; cgardner@uillinois.edu; Jack.Drummond@kirtland.af.mil; tjk7@psu.edu NR 17 TC 13 Z9 13 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD APR 24 PY 2003 VL 108 IS D8 AR 8454 DI 10.1029/2002JD002392 PG 9 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 678AQ UT WOS:000182842900002 ER PT J AU Wicklund, MP Hilton-Jones, D AF Wicklund, MP Hilton-Jones, D TI The limb-girdle muscular dystrophies - Genetic and phenotypic definition of a disputed entity SO NEUROLOGY LA English DT Editorial Material C1 Wilford Hall USAF Med Ctr, Dept Neurol, Lackland AFB, TX 78236 USA. Radcliffe Infirm, Dept Neurol, Oxford OX2 6HE, England. RP Wicklund, MP (reprint author), Wilford Hall USAF Med Ctr, Dept Neurol, 59MDOS-MMCN,2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA. NR 10 TC 9 Z9 9 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0028-3878 J9 NEUROLOGY JI Neurology PD APR 22 PY 2003 VL 60 IS 8 BP 1230 EP 1231 PG 2 WC Clinical Neurology SC Neurosciences & Neurology GA 671XD UT WOS:000182489600005 PM 12707421 ER PT J AU Krishna, S Raghavan, S von Winckel, G Rotella, P Stintz, A Morath, CP Le, D Kennerly, SW AF Krishna, S Raghavan, S von Winckel, G Rotella, P Stintz, A Morath, CP Le, D Kennerly, SW TI Two color InAs/InGaAs dots-in-a-well detector with background-limited performance at 91 K SO APPLIED PHYSICS LETTERS LA English DT Article ID INAS/GAAS QUANTUM DOTS; INFRARED PHOTODETECTORS; MIDINFRARED PHOTOCONDUCTIVITY AB Normal incidence long wave infrared (lambda(c)similar to9 mum) InAs/In0.15Ga0.85As dots-in-a-well detectors with background limited performance at 91 K, under f#1.7 300 K background irradiance, are reported. Two distinct peaks (lambda(p1)similar to4.2 mum and lambda(p2)similar to7.6 mum) are observed in the spectral response, which could possibly be due to a bound-to-continuum transition and a bound-to-bound transition, respectively. The operating wavelength of the detector can be varied by changing the width of the quantum well surrounding the quantum dots. Using calibrated blackbody measurements, the peak responsivity of the detector is measured to be 0.73 A/W (V-b=-1.7 V at T=60 K). (C) 2003 American Institute of Physics. C1 Univ New Mexico, Dept EECE, Ctr High Technol Mat, Albuquerque, NM 87106 USA. USAF, Res Lab, VSSS, Kirtland AFB, NM 87117 USA. USA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USA. RP Krishna, S (reprint author), Univ New Mexico, Dept EECE, Ctr High Technol Mat, Albuquerque, NM 87106 USA. RI Krishna, Sanjay /C-5766-2009; Morath, Christian/B-9147-2008 OI Morath, Christian/0000-0001-5838-9301 NR 22 TC 70 Z9 71 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 21 PY 2003 VL 82 IS 16 BP 2574 EP 2576 DI 10.1063/1.1567806 PG 3 WC Physics, Applied SC Physics GA 667WY UT WOS:000182258800008 ER PT J AU Maguire, JF Amer, MS Busbee, J AF Maguire, JF Amer, MS Busbee, J TI Exploring two-dimensional soap-foam films using fullerene (C-60) nanosensors SO APPLIED PHYSICS LETTERS LA English DT Article ID LANGMUIR MONOLAYERS; GRAIN-ORIENTATION; BUBBLE-SCALE; MODEL; BEHAVIOR; AVALANCHES; MECHANICS; DYNAMICS; METHANOL; STRAIN AB A large number of studies have been devoted to the investigation of foam structure formation, characteristics, and stability. In this paper, we use fullerene (C-60) spheres as Raman active nanosensors to probe the local chemical environment in a two-dimensional soap foam. It has been found that the position of the Raman active pentagon pinch mode around 1469 cm(-1) shifts to lower wave numbers with the increase in the angle between foam-cell boundaries. The observed shift is due to changes in the local chemical interaction between the nanosensor and its environment. The study demonstrates that fullerenes may be used as sensitive nanoscale sensors to probe the local chemical potential in soft and interfacial materials, and more importantly in thermodynamically small systems. (C) 2003 American Institute of Physics. C1 USAF, Res Lab, Mat Directorate, Wright Patterson AFB, OH 45433 USA. Wright State Univ, Dept Mech & Mat Engn, Dayton, OH 45435 USA. RP Maguire, JF (reprint author), USAF, Res Lab, Mat Directorate, Wright Patterson AFB, OH 45433 USA. RI Amer, Maher/A-1802-2009 NR 39 TC 12 Z9 12 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 21 PY 2003 VL 82 IS 16 BP 2592 EP 2594 DI 10.1063/1.1567455 PG 3 WC Physics, Applied SC Physics GA 667WY UT WOS:000182258800014 ER PT J AU Ionin, AA Klimachev, YM Kotkov, AA Kochetov, IV Napartovich, AP Seleznev, LV Sinitsyn, DV Hager, GD AF Ionin, AA Klimachev, YM Kotkov, AA Kochetov, IV Napartovich, AP Seleznev, LV Sinitsyn, DV Hager, GD TI Non-self-sustained electric discharge in oxygen gas mixtures: singlet delta oxygen production SO JOURNAL OF PHYSICS D-APPLIED PHYSICS LA English DT Article ID IODINE LASER; GENERATOR AB The possibility of obtaining a high specific input energy in an electron-beam sustained discharge ignited in oxygen gas mixtures O-2 : Ar : CO (or H-2) at the total gas pressures of 10-100 Torr was experimentally demonstrated. The specific input energy per molecular component exceeded similar to6 kJ l(-1) atm(-1) (150 kJ mol(-1)) as a small amount of carbon monoxide was added into a gas mixture of oxygen and argon. It was theoretically demonstrated that one might expect to obtain a singlet delta oxygen yield of 25% exceeding its threshold value needed for an oxygen-iodine laser operation at room temperature, when maintaining a non-self-sustained discharge in oxygen gas mixtures with molecular additives CO, H-2 or D-2. The efficiency of singlet delta oxygen production can be as high as 40%. C1 PN Lebedev Phys Inst, Moscow 119991, Russia. Troitsk Inst Innovat & Fus Res, Troitsk, Moscow Region, Russia. Air Force Res Lab, Kirtland AFB, NM 87117 USA. RP Ionin, AA (reprint author), PN Lebedev Phys Inst, 53,Leninsky Prosp, Moscow 119991, Russia. RI Selenev, Leonid/K-7441-2015; Sinitsyn, Dmitry/L-7874-2015; Ionin, Andrey/M-3857-2015; Kochetov, Igor/N-2202-2015; Napartovich, Anatoly/C-1081-2016; Kotkov, Andrei/K-7590-2015; Klimachev, Yury/K-7607-2015 OI Selenev, Leonid/0000-0002-8121-9914; Sinitsyn, Dmitry/0000-0002-7448-6459; Ionin, Andrey/0000-0003-3119-4592; Kochetov, Igor/0000-0003-1198-4431; Kotkov, Andrei/0000-0001-5967-0840; Klimachev, Yury/0000-0001-6784-1590 NR 34 TC 82 Z9 85 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0022-3727 J9 J PHYS D APPL PHYS JI J. Phys. D-Appl. Phys. PD APR 21 PY 2003 VL 36 IS 8 BP 982 EP 989 AR PII S0022-3727(03)55603-0 DI 10.1088/0022-3727/36/8/307 PG 8 WC Physics, Applied SC Physics GA 678ZZ UT WOS:000182897700010 ER PT J AU Lemaire, A Meyer, TR Zahringer, KZ Rolon, JC Gord, JR AF Lemaire, A Meyer, TR Zahringer, KZ Rolon, JC Gord, JR TI Vortex-induced flame extinction in two-phase counterflow diffusion flames with CH planar laser-induced fluorescence and particle-image velocimetry SO APPLIED OPTICS LA English DT Article; Proceedings Paper CT 8th Topical Meeting on Laser Applications to Chemical and Environmental Analysis (8th LACEA) CY FEB 07-10, 2002 CL BOULDER, CO SP Opt Soc Amer ID REACTION ZONE STRUCTURE; SCALAR AB Here the interaction between a laminar two-phase, non-pre-mixed counterflow flame and a vortex is examined. Special emphasis is given to the influence of different flame and vortex parameters on the extinction behavior of the flame. Simultaneaous planar laser-induced fluorescence of the CH radical layer produced by the flame and particle-image velocimetry measurements of the flowfield are used to characterize the flame-vortex interaction. These simultaneous diagnostics are used for the first time in this configuration. The extinction processes occurring during the flame-vortex interaction can be analyzed by this method, especially the influence of strain at the flame surface. The influence of the droplets on the extinction behavior appears clearly compared with a fully gaseous flame. The spray flame is weaker and extinguishes earlier than does a. gaseous flame. In the measurement's an additional broadband signal in the vicinity of the CH layer is probably due to the induced fluorescence of polycyclic aromatic hydrocarbons, excited at the same wavelength. (C) 2003 Optical Society of America. C1 Ecole Cent Paris, CNRS, Lab EM2C, F-92295 Chatenay Malabry, France. Innovat Sci Solut Inc, Dayton, OH USA. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. RP Lemaire, A (reprint author), Ecole Cent Paris, CNRS, Lab EM2C, F-92295 Chatenay Malabry, France. EM trmeyer@innssi.comis; rolon@em2c.eep.fr RI Meyer, Terrence/F-1556-2011 NR 23 TC 1 Z9 1 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 APR 20 PY 2003 VL 42 IS 12 BP 2063 EP 2071 DI 10.1364/AO.42.002063 PG 9 WC Optics SC Optics GA 670BD UT WOS:000182386600006 PM 12716146 ER PT J AU Darwish, M Moukalled, F Sekar, B AF Darwish, M Moukalled, F Sekar, B TI A robust multi-grid pressure-based algorithm for multi-fluid flow at all speeds SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS LA English DT Article DE multi-grid; two-dimensional multi-fluid flow; two-dimensional multiphase flow; pressure-based algorithm; all speed flow; finite-volume method ID HIGH-RESOLUTION SCHEMES; 2-PHASE FLOW; NUMERICAL-SIMULATION; UNIFIED FORMULATION; SUPERSONIC FLOWS; SEGREGATED CLASS; GAS; PREDICTION; TRANSPORT; NOZZLE AB This paper reports on the implementation and testing, within a full non-linear multi-grid environment, of a new pressure-based algorithm for the prediction of multi-fluid flow at all speeds. The algorithm is part of the mass conservation-based algorithms (MCBA) group in which the pressure correction equation is derived from overall mass conservation. The performance of the new method is assessed by solving a series of two-dimensional two-fluid flow test problems varying from turbulent low Mach number to supersonic flows, and from very low to high fluid density ratios. Solutions are generated for several grid sizes using the single grid (SG), the prolongation grid (PG), and the full non-linear multi-grid (FMG) methods. The main outcomes of this study are: (i) a clear demonstration of the ability of the FMG method to tackle the added non-linearity of multi-fluid flows, which is manifested through the performance jump observed when using the non-linear multi-grid approach as compared to the SG and PG methods; (ii) the extension of the FMG method to predict turbulent multi-fluid flows at all speeds. The convergence history plots and CPU-times presented indicate that the FMG method is far more efficient than the PG method and accelerates the convergence rate over the SG method, for the problems solved and the grids used, by a factor reaching a value as high as 15. Copyright (C) 2003 John Wiley Sons, Ltd. C1 Amer Univ Beirut, Fac Engn & Architecture, Dept Engn Mech, Beirut, Lebanon. USAF, Res Lab, PRTC, Wright Patterson AFB, OH 45433 USA. RP Moukalled, F (reprint author), Amer Univ Beirut, Fac Engn & Architecture, Dept Engn Mech, POB 11-0236, Beirut, Lebanon. OI Darwish, Marwan/0000-0002-2120-469X NR 47 TC 8 Z9 8 U1 0 U2 3 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 0271-2091 J9 INT J NUMER METH FL JI Int. J. Numer. Methods Fluids PD APR 20 PY 2003 VL 41 IS 11 BP 1221 EP 1251 DI 10.1002/fld.490 PG 31 WC Computer Science, Interdisciplinary Applications; Mathematics, Interdisciplinary Applications; Mechanics; Physics, Fluids & Plasmas SC Computer Science; Mathematics; Mechanics; Physics GA 663HM UT WOS:000182000200005 ER PT J AU Kobryn, PA Semiatin, SL AF Kobryn, PA Semiatin, SL TI Microstructure and texture evolution during solidification processing of Ti-6Al-4V SO JOURNAL OF MATERIALS PROCESSING TECHNOLOGY LA English DT Article; Proceedings Paper CT International Conference on Research and Development in Net-Shape Manufacturing CY APR 09-11, 2001 CL UNIV BIRMINGHAM, BIRMINGHAM, ENGLAND HO UNIV BIRMINGHAM DE microstructure; texture evolution; solidification processing ID CONVENTIONAL TITANIUM-ALLOY; GRAIN-GROWTH AB Metal-mold casting and direct laser fabrication of titanium have become topics of great interest to the aerospace industry in recent years due to the strong focus on reducing the acquisition cost of aircraft. However, little is known about the capabilities of these processes with respect to microscale characteristics such as grain morphology, grain size, microstructure, and texture/microtexture. Hence, an extensive research program was undertaken to establish the relationships between processing conditions and microstructural characteristics and to apply finite-element-method process-modeling techniques and phenomenological microstructure-evolution-modeling techniques for the prediction of nricrostructure during these processes. Selected results from this research are presented. (C) 2002 Published by Elsevier Science B.V. C1 USAF, Res Lab, Mat & Mfg Directorate, AFRL,MLLMP, Wright Patterson AFB, OH 45433 USA. RP Semiatin, SL (reprint author), USAF, Res Lab, Mat & Mfg Directorate, AFRL,MLLMP, 2230 10 St, Wright Patterson AFB, OH 45433 USA. RI SEMIATIN, SHELDON/E-7264-2017 NR 13 TC 89 Z9 90 U1 10 U2 37 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0924-0136 J9 J MATER PROCESS TECH JI J. Mater. Process. Technol. PD APR 20 PY 2003 VL 135 IS 2-3 BP 330 EP 339 AR PII S0924-0136(02)00865-8 DI 10.1016/S0924-0136(02)00865-8 PG 10 WC Engineering, Industrial; Engineering, Manufacturing; Materials Science, Multidisciplinary SC Engineering; Materials Science GA 666KB UT WOS:000182175500028 ER PT J AU Del Rincon, I Battafarano, DF Arroyo, RA Murphy, FT Fischbach, M Escalante, A AF Del Rincon, I Battafarano, DF Arroyo, RA Murphy, FT Fischbach, M Escalante, A TI Ethnic variation in the clinical manifestations of rheumatoid arthritis: Role of HLA-DRB1 Alleles SO ARTHRITIS & RHEUMATISM-ARTHRITIS CARE & RESEARCH LA English DT Article DE rheumatoid arthritis; African Americans; Hispanic Americans; ethnic groups; HLA-DRB1; shared epitope ID SHARED-EPITOPE HYPOTHESIS; AMERICAN PATIENTS; DISEASE SEVERITY; SUSCEPTIBILITY; ASSOCIATION; RA; EXPRESSION; DISABILITY; REVEALS; INDIANS AB Objective. To assess the extent of ethnic variation in the clinical expression of rheumatoid arthritis (RA) and the role of HLA-DRB1 alleles in this variation. Methods. We assessed consecutive RA patients for joint findings, subcutaneous nodules, laboratory and radiographic findings, and treatment. We typed HLA-DRB1 alleles to identify those that contain the shared epitope (SE). We adjusted ethnic comparisons for age and sex, and tested for ethnic heterogeneity in the effect of the SE. Results. We studied 777 RA patients, 498 of whom were women (64%), 432 were Hispanic (56%), 2 72 were non-Hispanic white (NHW; 35%), 53 were African American (AA; 7%), and 20 were Asian (3%). Compared with NHW, Hispanics had significantly more tender joints (17 versus 11), more swollen joints (8 versus 7), more frequent rheumatoid factor (RF) positivity (93% versus 84%), higher erythrocyte sedimentation rate (ESR; 45 versus 36 mm/hr), and a lower number of lifetime disease-modifying antirheumatic drugs (1.9 versus 2.5). AA were older at onset (46 versus 44 years), had less frequent subcutaneous nodules (18% versus 28%). and higher ESR (42 versus 36 mm/hour) than did NHW. Hispanics and AA were more likely than NHW to be null for the SE (odds ratio, [OR] = 4.59 for AA; and OR = 1.61 for Hispanics), and less likely to have 2 SE-carrying alleles (OR = 0.59 for Hispanics and OR = 0.25 for AA). The number of SE copies was associated with subcutaneous nodules, ESR, RF, and radiographic changes. Ethnic heterogeneity in the effect of the SE was modest. Conclusions. There is ethnic variation in the clinical expression of RA and in both the frequency and types of SE-carrying HLA-DRB1 alleles. Some ethnic variation in clinical findings is associated with differences in SE frequency. However, we found that the effect of the SE on the clinical features of RA varies little between ethnic groups. C1 Univ Texas, Hlth Sci Ctr, San Antonio, TX 78229 USA. Brooke Army Med Ctr, San Antonio, TX USA. Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. S Texas Vet Adm Hlth Syst, San Antonio, TX USA. RP Escalante, A (reprint author), Univ Texas, Hlth Sci Ctr, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA. FU NCRR NIH HHS [M01-RR1346]; NHLBI NIH HHS [K23-HL004481]; NIAMS NIH HHS [K24-AR47530]; NICHD NIH HHS [R01-HD37151] NR 37 TC 35 Z9 35 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0004-3591 J9 ARTHRIT RHEUM-ARTHR JI Arthritis Rheum-Arthritis Care Res. PD APR 15 PY 2003 VL 49 IS 2 BP 200 EP 208 DI 10.1002/art.11000 PG 9 WC Rheumatology SC Rheumatology GA 666HM UT WOS:000182171700009 PM 12687511 ER PT J AU Tringe, JW Uhlman, TA Oliver, AC Houston, JE AF Tringe, JW Uhlman, TA Oliver, AC Houston, JE TI A single asperity study of Au/Au electrical contacts SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID SURFACES; MICROCONTACTS; DEFORMATION; MICROSCOPY AB Interfacial force microscopy (IFM) is used to measure the electrical contact properties of electroplated gold thin films of the type used in microelectromechanical system relays. Force and current levels consistent with those present in metal-metal contact switches are examined in an atmospheric-pressure, dry-nitrogen ambient at room temperature, and the nature of a nonmetallic contamination layer which limits contact resistance and lifetime is explicitly examined mechanically, electrically and chemically. The electrical and mechanical properties of the contamination layer on the gold substrate are observed by IFM both before and after being exposed to ozone for an extended period of time. The contamination film is characterized by x-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry, and found to consist mostly of hydrocarbons; the film remains relatively stable in both composition and thickness following ozonation. However, some subtle chemical changes in the contamination layer induced by the ozonation process are found to profoundly affect the electrical properties of the gold-gold contact, reducing the resistance by more than 3 orders of magnitude and considerably reducing variability in the contact resistance between contact events. These results clearly demonstrate the critical role both positive and negative of the latent contamination present on the contact surfaces. (C) 2003 American Institute of Physics. C1 USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Tringe, JW (reprint author), USAF, Res Lab, Space Vehicles Directorate, Kirtland AFB, NM 87117 USA. NR 17 TC 46 Z9 46 U1 0 U2 6 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 APR 15 PY 2003 VL 93 IS 8 BP 4661 EP 4669 DI 10.1063/1.1561998 PG 9 WC Physics, Applied SC Physics GA 660YL UT WOS:000181863100042 ER PT J AU Glavicic, MG Kobryn, PA Spadafora, F Semiatin, SL AF Glavicic, MG Kobryn, PA Spadafora, F Semiatin, SL TI Texture evolution in vacuum arc remelted ingots of Ti-6Al-4V SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE titanium; ingot; texture; phase transformation; EBSD ID ORIENTATION; TITANIUM; ALLOYS; PLATES; PHASE AB The textures of the alpha and beta phases of a production-scale Ti-6Al-4V VAR ingot were determined using orientation imaging microscopy (OIM). Alpha-phase textures were determined directly from specimens that were cut from various regions of the ingot. To determine the texture of the beta phase, the measured orientations of alpha-phase variants from a number of prior-beta grains and specialized analysis software, which was based on the burgers relation between the alpha and beta phases, were utilized. The results of the analysis demonstrated that the columnar grains in the ingot had formed as a result of solidification of the beta phase along <100> preferred-growth directions. By contrast, the equiaxed grains at the center of the ingot had random alpha- and beta-phase textures. (C) 2002 Elsevier Science B.V. All rights reserved. C1 RMI Titanium Co, Niles, OH USA. USAF, Res Lab, Mat & Mfg Directorate, AFRL,MLLMP, Wright Patterson AFB, OH 45433 USA. Universal Energy Syst Inc, Dayton, OH 45432 USA. RP Glavicic, MG (reprint author), Universal Energy Syst Inc, 4401 Dayton Xenia Rd, Dayton, OH 45432 USA. EM rivglav@msn.com RI SEMIATIN, SHELDON/E-7264-2017 NR 14 TC 15 Z9 16 U1 4 U2 17 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD APR 15 PY 2003 VL 346 IS 1-2 BP 8 EP 18 AR PII S0921-5093(02)00525-7 DI 10.1016/S0921-5093(02)00525-7 PG 11 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 642RG UT WOS:000180817700002 ER PT J AU Glavicic, MG Kobryn, PA Bieler, TR Semiatin, SL AF Glavicic, MG Kobryn, PA Bieler, TR Semiatin, SL TI A method to determine the orientation of the high-temperature beta phase from measured EBSD data for the low-temperature alpha phase in Ti-6Al-4V SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE titanium; phase transformations; burgers relation; texture; EBSD ID TI-64 SHEET; TRANSFORMATION AB A method was developed to determine the orientation of the high-temperature beta phase from measured electron-backscatter diffraction (EBSD) data for the low-temperature alpha phase in Ti-6Al-4V. This technique is an improvement over existing methods because it does not require a priori knowledge of the variant selection process and can accommodate variants from adjacent beta grains being incorporated in the data set submitted for analysis. It is a general method and therefore can be used to examine texture relationships in materials other than Ti-6Al-4V which undergo a burgers-type phase transformation. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Universal Energy Syst Inc, Dayton, OH 45432 USA. USAF, Res Lab, Mat & Mfg Directorate, AFRL,MLLMP, Wright Patterson AFB, OH 45433 USA. Michigan State Univ, Dept Mat Sci & Mech, E Lansing, MI 48824 USA. RP Glavicic, MG (reprint author), Universal Energy Syst Inc, 4401 Dayton Xenia Rd, Dayton, OH 45432 USA. RI SEMIATIN, SHELDON/E-7264-2017 NR 8 TC 45 Z9 46 U1 2 U2 26 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD APR 15 PY 2003 VL 346 IS 1-2 BP 50 EP 59 AR PII S0921-5093(02)00535-X DI 10.1016/S0921-5093(02)00535-X PG 10 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 642RG UT WOS:000180817700007 ER PT J AU Kalinyuk, AN Trigub, NP Zamkov, VN Ivasishin, OM Markovsky, PE Teliovich, RV Semiatin, SL AF Kalinyuk, AN Trigub, NP Zamkov, VN Ivasishin, OM Markovsky, PE Teliovich, RV Semiatin, SL TI Microstructure, texture, and mechanical properties of electron-beam melted Ti-6A1-4V SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE titanium; electron-beam melting; thermomechanical processing ID TEMPERATURE DEFORMATION; TITANIUM; ALLOYS AB The chemical homogeneity, microstructure, texture, and mechanical properties of Ti-6Al-4V ingots synthesized via electron-beam melting were established. Despite large aluminum losses during melting, very uniform compositions well within the specification for the alloy were obtained in both 200- and 400-mm diameter ingots. The local conditions of melting and solidification produced essentially texture-free as-cast material with a largely equiaxed beta grain structure. Following hot working via rolling at various temperatures, a wide range of microstructures and textures similar to those found in conventionally-processed Ti-6Al-4V was obtained. The resulting mechanical properties were comparable to or better than those found in Ti-6Al-4V synthesized via vacuum arc remelting. (C) 2002 Elsevier Science B.V. All rights reserved. C1 GV Kurdyumov Inst Met Phys, Kiev, Ukraine. EO Paton Elect Welding Inst, Kiev, Ukraine. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. RP Ivasishin, OM (reprint author), GV Kurdyumov Inst Met Phys, Kiev, Ukraine. RI SEMIATIN, SHELDON/E-7264-2017 NR 16 TC 28 Z9 28 U1 5 U2 33 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD APR 15 PY 2003 VL 346 IS 1-2 BP 178 EP 188 AR PII S0921-5093(02)00518-X DI 10.1016/S0921-5093(02)00518-X PG 11 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 642RG UT WOS:000180817700022 ER PT J AU Starman, LA Lott, JA Amer, MS Cowan, WD Busbee, JD AF Starman, LA Lott, JA Amer, MS Cowan, WD Busbee, JD TI Stress characterization of MEMS microbridges by micro-Raman spectroscopy SO SENSORS AND ACTUATORS A-PHYSICAL LA English DT Article DE MEMS; Raman spectroscopy; residual stress; MUMPs; polysilicon ID LPCVD POLYSILICON; SILICON; FREQUENCIES; DIAMOND AB In this research, micro-Raman spectroscopy is employed to examine, and characterize the residual stress in MUMPs polysilicon, micro-electro-mechanical systems (MEMS) microbridge structures. Currently, few techniques are available to measure the residual stress in MEMS devices. The residual stresses from the deposition processes can have a profound effect on the functionality of the fabricated MEMS structures. Typically, material properties of thin films used in surface micromachining are not controlled during deposition. The residual stress, for example, tends to vary significantly for different deposition methods. Several post-fabrication processes are available to reduce the inherent residual stress from these deposition methods. In an attempt to reduce the residual stress in MEMS microbridges, a phosphorous diffusion and accompanying anneals were performed. Residual stress profiles obtained through micro-Raman spectroscopy are presented, illustrating stress reduction is possible through these post-processing techniques. The stress profiles presented demonstrate the variations between the MUMPs structural layers (Poly1 and Poly2) for different microbridge widths. The improved stress levels could significantly increase device performance, reliability, and yield. (C) 2002 Published by Elsevier Science B.V. C1 USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA. Wright State Univ, Dayton, OH 45435 USA. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. RP USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA. EM james.lott@afit.edu RI Amer, Maher/A-1802-2009 NR 17 TC 25 Z9 25 U1 3 U2 13 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0924-4247 J9 SENSOR ACTUAT A-PHYS JI Sens. Actuator A-Phys. PD APR 15 PY 2003 VL 104 IS 2 BP 107 EP 116 AR PII S0924-4247(02)00432-6 DI 10.1016/S0924-4247(02)00432-6 PG 10 WC Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA 664AC UT WOS:000182038700001 ER PT J AU Mehandru, R Luo, B Kim, J Ren, F Gila, BP Onstine, AH Abernathy, CR Pearton, SJ Gotthold, D Birkhahn, R Peres, B Fitch, R Gillespie, J Jenkins, T Sewell, J Via, D Crespo, A AF Mehandru, R Luo, B Kim, J Ren, F Gila, BP Onstine, AH Abernathy, CR Pearton, SJ Gotthold, D Birkhahn, R Peres, B Fitch, R Gillespie, J Jenkins, T Sewell, J Via, D Crespo, A TI AlGaN/GaN metal-oxide-semiconductor high electron mobility transistors using Sc2O3 as the gate oxide and surface passivation SO APPLIED PHYSICS LETTERS LA English DT Article ID FIELD-EFFECT-TRANSISTORS; LOW-FREQUENCY NOISE; POWER; HEMTS; PERFORMANCE; TEMPERATURE; DIELECTRICS; MOSHFET; LAYERS; MGO AB We demonstrated that Sc2O3 thin films deposited by plasma-assisted molecular-beam epitaxy can be used simultaneously as a gate oxide and as a surface passivation layer on AlGaN/GaN high electron mobility transistors (HEMTs). The maximum drain source current, I-DS, reaches a value of over 0.8 A/mm and is similar to40% higher on Sc2O3/AlGaN/GaN transistors relative to conventional HEMTs fabricated on the same wafer. The metal-oxide-semiconductor HEMTs (MOS-HEMTs) threshold voltage is in good agreement with the theoretical value, indicating that Sc2O3 retains a low surface state density on the AlGaN/GaN structures and effectively eliminates the collapse in drain current seen in unpassivated devices. The MOS-HEMTs can be modulated to +6 V of gate voltage. In particular, Sc2O3 is a very promising candidate as a gate dielectric and surface passivant because it is more stable on GaN than is MgO. (C) 2003 American Institute of Physics. C1 Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA. Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA. EMCORE Corp, Somerset, NJ 08873 USA. USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA. RP Mehandru, R (reprint author), Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA. RI Gotthold, David/D-1086-2011; Kim, Jihyun/F-6940-2013 OI Gotthold, David/0000-0002-3990-6614; NR 32 TC 97 Z9 99 U1 1 U2 19 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD APR 14 PY 2003 VL 82 IS 15 BP 2530 EP 2532 DI 10.1063/1.1567051 PG 3 WC Physics, Applied SC Physics GA 665DT UT WOS:000182104900054 ER PT J AU Wisniewski, CF Hewett, KB Manke, GC Truman, CR Hager, GD AF Wisniewski, CF Hewett, KB Manke, GC Truman, CR Hager, GD TI Non-Intrusive mach number measurement in a supersonic hydrogen fluoride laser SO CHEMICAL PHYSICS LETTERS LA English DT Article AB An experimental technique has been developed to directly measure flow velocity and Mach number in a supersonic hydrogen fluoride laser. The technique uses a tunable diode laser source to probe the laser cavity at an angle to the flow creating a Doppler shifted lineshape. The amount of Doppler shift can be related to the flow velocity. The diode laser was traversed in the vertical direction to produce velocity and Mach number profiles. (C) 2003 Elsevier Science B.V. All rights reserved. C1 USAF, Directed Energy Directorate, Kirtland AFB, NM 87117 USA. Univ New Mexico, Dept Mech Engn, Albuquerque, NM 87131 USA. RP Hewett, KB (reprint author), USAF, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA. NR 19 TC 6 Z9 6 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD APR 14 PY 2003 VL 371 IS 5-6 BP 522 EP 527 DI 10.1016/S0009-2614(03)00265-3 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 665CZ UT WOS:000182103200002 ER PT J AU Vahala, G Yepez, J Vahala, L AF Vahala, G Yepez, J Vahala, L TI Quantum lattice gas representation of some classical solitons SO PHYSICS LETTERS A LA English DT Article DE solitons; collision-induced phase shifts; quantum lattice gas; quantum computer ID SCHRODINGER-EQUATION; MODEL; COMPUTATION AB A quantum lattice gas representation is determined for both the non-linear Schrodinger (NLS) and Korteweg-de Vries (KdV) equations. There is excellent agreement with the solutions from these representations to the exact soliton-soliton collisions of the integrable NLS and KdV equations. These algorithms could, in principle, be simulated on a hybrid quantum-classical computer. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA. USAF, Res Lab, Hanscom AFB, MA 01731 USA. Old Dominion Univ, Dept Elect & Comp Engn, Norfolk, VA 23529 USA. RP Vahala, G (reprint author), Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA. NR 24 TC 26 Z9 26 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD APR 14 PY 2003 VL 310 IS 2-3 BP 187 EP 196 DI 10.1016/S0375-9601(03)00334-7 PG 10 WC Physics, Multidisciplinary SC Physics GA 666XX UT WOS:000182202700015 ER PT J AU Park, T Mall, S Nicholas, T AF Park, T Mall, S Nicholas, T TI Effects of pre-damage on HCF behaviors of Ti-6Al-4V alloy SO INTERNATIONAL JOURNAL OF MODERN PHYSICS B LA English DT Article; Proceedings Paper CT 3rd International Conference on Advanced Materials Development and Performance CY OCT 16-19, 2002 CL TAEGU, SOUTH KOREA ID HIGH-CYCLE-FATIGUE; TITANIUM-ALLOYS AB The effects of pre-damage on the fatigue strength of Ti-6Al-4V were investigated by applying the low cycle fatigue(LCF) as a pre-damage prior to high cycle fatigue(HCF) test. The fatigue strengths were obtained by means of step-loading method. The pre-damage condition was decided as 900MPa, 0.5R, 50,000cycles through LCF test, and was introduced before step-loading test. The fatigue strength of Ti-6Al-4V alloy derived from step-loading test without pre-damage was about 639MPa. The introduction of pre-damage deteriorates the fatigue strength about 6%. Progressive change in elongation with increasing cycles was observed. The strain accumulated by pre-damage varies the displacement in the next loading step, but afterward this doesn't change the displacement any more. The strain formed by pre-damage is thought to result in earlier failure and lower fatigue strength. C1 Agcy Def Dev, Mat Lab, Taejon 305600, South Korea. USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. RP Park, T (reprint author), Agcy Def Dev, Mat Lab, Yuseong,POB 35-5, Taejon 305600, South Korea. NR 9 TC 0 Z9 0 U1 0 U2 1 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 912805, SINGAPORE SN 0217-9792 J9 INT J MOD PHYS B JI Int. J. Mod. Phys. B PD APR 10 PY 2003 VL 17 IS 8-9 BP 1994 EP 2000 DI 10.1142/S0217979203020004 PN 2 PG 7 WC Physics, Applied; Physics, Condensed Matter; Physics, Mathematical SC Physics GA 694BJ UT WOS:000183752800070 ER PT J AU Lord, LW AF Lord, LW TI US pushing to maintain asymmetric advantage in military space SO AVIATION WEEK & SPACE TECHNOLOGY LA English DT Article C1 USAF, Space Command, Washington, DC 20330 USA. RP Lord, LW (reprint author), USAF, Space Command, 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 USA SN 0005-2175 J9 AVIAT WEEK SPACE TEC JI Aviat. Week Space Technol. PD APR 7 PY 2003 VL 158 IS 14 BP 86 EP 86 PG 1 WC Engineering, Aerospace SC Engineering GA 664QP UT WOS:000182072000030 ER PT J AU Shiokawa, K Otsuka, Y Ihara, C Ogawa, T Rich, FJ AF Shiokawa, K Otsuka, Y Ihara, C Ogawa, T Rich, FJ TI Ground and satellite observations of nighttime medium-scale traveling ionospheric disturbance at midlatitude SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE medium-scale traveling ionospheric disturbance; airglow imaging; polarization electric field; MSTID; ion drift; 630.0 nm ID ELECTRIC-FIELD FLUCTUATIONS; SPREAD-F; MU-RADAR; GRAVITY-WAVES; MID-LATITUDES; AIRGLOW; CONJUGATE; CAMPAIGN; ELECTRODYNAMICS; INTERFEROMETER AB [1] We have investigated a nighttime medium-scale traveling ionospheric disturbance (MSTID) observed by an airglow imager at Shigaraki (34.9degreesN, 25.4degreesMLAT), Japan, on 17 May 2001. The structure was identified in the airglow images of OI (630.0 nm and 777.4 nm) as NW-SE band structures (horizontal wavelength: 230 km) moving southwestward with a velocity of 50 m/s. Neutral wind velocity was measured simultaneously from the Doppler shift of the 630.0-nm emission by a Fabry-Perot interferometer at Shigaraki. From these parameters, we performed model calculations of MSTIDs generated by gravity waves and by an oscillating electric field. We found that for the case of gravity waves, the estimated vertical wavelength was too small to explain the observed amplitudes of airglow intensity. For the case of the electric field, we found that an electric field oscillation of similar to1.2 mV/m was sufficient to reproduce the observed airglow amplitudes. This modeled electric field was comparable to that observed by the DMSP F15 satellite as it passed over Shigaraki during our observing period on 17 May 2001. The DMSP ion drift data show that the oscillation of the polarization electric field correlated with the MSTID structure in the airglow image, suggesting that the polarization electric field plays an important role in the generation of MSTIDs. C1 Nagoya Univ, Solar Terr Environm Lab, Toyokawa 4428507, Japan. USAF, Res Lab, Bedford, MA 01731 USA. RP Shiokawa, K (reprint author), Nagoya Univ, Solar Terr Environm Lab, Toyokawa 4428507, Japan. NR 48 TC 64 Z9 66 U1 3 U2 13 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD APR 4 PY 2003 VL 108 IS A4 AR 1145 DI 10.1029/2002JA009639 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 667QJ UT WOS:000182244000003 ER PT J AU Ehlerding, A Arnold, ST Viggiano, AA Kalhori, S Semaniak, J Derkatch, AM Rosen, S af Ugglas, M Larsson, M AF Ehlerding, A Arnold, ST Viggiano, AA Kalhori, S Semaniak, J Derkatch, AM Rosen, S af Ugglas, M Larsson, M TI Rates and products of the dissociative recombination of C3H7+ in low-energy electron collisions SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID ION STORAGE-RINGS; PROTONATED CYCLOPROPANE; REACTION DYNAMICS; CROSS-SECTIONS; MOLECULAR-IONS; ISOMERIZATION; EXCITATION; SURFACE AB This paper presents a study of the dissociative recombination of C3H7+ with electrons in a heavy-ion storage ring, CRYRING. Cross sections were measured as a function of kinetic energy and found to be extremely rapid with a dependence of E-1.10+/-0.01. The recombination cross section was integrated to yield a thermal rate coefficient of 1.9 x 10(-6) cm(3) s(-1). Product branching ratios were measured and proved to be quite complex. Although 16 channels are energetically accessible at 0 eV, it was not possible to assign branching ratios to all channels; some related channels were combined in the analysis. The results show that the dissociation channel corresponding to loss of a single hydrogen atom dominates, with a branching ratio of 0.42. Multiple H-loss channels are also observed. Product channels that involve breaking a C-C bond have a combined branching ratio ranging from 0.34 to 0.39. C1 Stockholm Univ, SCFAB, Dept Phys, SE-10691 Stockholm, Sweden. USAF, Res Lab, Space Vehciles Directorate, Hanscom AFB, MA 01731 USA. Jan Kochanowski Univ Humanities & Sci, Inst Phys, PL-25406 Kielce, Poland. Stockholm Univ, Manne Siegbahn Lab, SE-10405 Stockholm, Sweden. RP Ehlerding, A (reprint author), Stockholm Univ, SCFAB, Dept Phys, SE-10691 Stockholm, Sweden. EM anneli@physto.se NR 28 TC 24 Z9 24 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD APR 3 PY 2003 VL 107 IS 13 BP 2179 EP 2184 DI 10.1021/jp027729+ PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 661ZY UT WOS:000181921900007 ER PT J AU Rogers, CF Sagebiel, JC Zielinska, B Arnott, WP Fujita, EM McDonald, JD Griffin, JB Kelly, K Overacker, D Wagner, D Lighty, JS Sarofim, A Palmer, G AF Rogers, CF Sagebiel, JC Zielinska, B Arnott, WP Fujita, EM McDonald, JD Griffin, JB Kelly, K Overacker, D Wagner, D Lighty, JS Sarofim, A Palmer, G TI Characterization of submicron exhaust particles from engines operating without load on diesel and JP-8 fuels SO AEROSOL SCIENCE AND TECHNOLOGY LA English DT Article ID SIZE; EMISSIONS; VEHICLES AB Diluted exhaust from a selection of Air Force ground support vehicles was subjected to gravimetric, carbon, and size distribution analyses in September 1999. The vehicles operated on diesel and JP-8 fuels. In most cases, the engines involved were similar to civilian counterparts. The tests involved "low" and "high" idle settings but no external loads were imposed. Particle size distribution data, obtained over the 10 to 352 nanometer diameter range using an SMPS instrument, showed that the relative number count of accumulation mode particles increased with respect to nucleation mode particles as the engine rpm increased. The SMPS distributions often explained the main variations in the integrated PM2.5 gravimetric mass data. Particulate mass derived from the SMPS data and from cascade impactor measurements were well correlated (regression slope 1.02). Empirically determined "elemental" carbon (EC) and "organic" carbon (OC) were the main constituents of the PM2.5 gravimetric mass (regression slope 0.89). EC contributed less, and OC contributed more to the PM2.5 mass than was found in some recent studies of exhaust from vehicles operated under external loads. The observed particle nucleation modes were attenuated by coagulation with accumulation mode particles, but it does not appear that artifact particle formation was operative in these experiments. The estimated +/-1sigma measurement precisions range from about +/-4% for the largest impactor mass concentration determinations to +/-24% for some of the SMPS mass concentration estimates. C1 Univ & Community Coll Syst Nevada, Div Atmospher Sci, Desert Res Inst, Reno, NV 89512 USA. Univ Utah, Dept Chem & Fuels Engn, Salt Lake City, UT USA. Hill AFB, Ogden, UT USA. RP Rogers, CF (reprint author), Univ & Community Coll Syst Nevada, Div Atmospher Sci, Desert Res Inst, 2215 Raggio Pkwy, Reno, NV 89512 USA. OI Kelly, Kerry/0000-0002-2232-3092 NR 20 TC 12 Z9 12 U1 0 U2 1 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 0278-6826 J9 AEROSOL SCI TECH JI Aerosol Sci. Technol. PD APR PY 2003 VL 37 IS 4 BP 355 EP 368 DI 10.1080/02786820390125214 PG 14 WC Engineering, Chemical; Engineering, Mechanical; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 641CG UT WOS:000180726400006 ER PT J AU Lucht, RP Velur-Natarajan, V Carter, CD Grinstead, KD Gord, JR Danehy, PM Fiechtner, GJ Farrow, RL AF Lucht, RP Velur-Natarajan, V Carter, CD Grinstead, KD Gord, JR Danehy, PM Fiechtner, GJ Farrow, RL TI Dual-pump coherent anti-Stokes Raman scattering temperature and CO(2) concentration measurements SO AIAA JOURNAL LA English DT Article ID INFRARED ENERGY-LEVELS; MODELESS DYE-LASER; BROAD-BAND CARS; CARBON-DIOXIDE; TURBULENT COMBUSTION; NOISE CHARACTERISTICS; ROTATIONAL DIFFUSION; SINGLE-MODE; SPECTROSCOPY; NITROGEN AB Measurements of temperature and CO(2) concentration using dual-pump coherent anti-Stokes Raman scattering (CARS) are described. The measurements were performed in laboratory flames, in a room-temperature gas cell, and on an. engine test stand at the U.S. Air Force Research Laboratory, Wright-Patterson Air, Force Base. A modeless dye laser, a single-mode Nd:YAG laser, and an unintensified back-illuminated charge-coupled device digital camera were used for these measurements. The CARS measurements were performed on a single-laser-shot basis. he standard deviations of the temperatures and CO(2) mole fractions determined from single-shot dual-pump CARS spectra in steady laminar propane/air flames were approximately 2 and 10% of the mean values of approximately K and 0:10, respectively. The precision and accuracy of single-shot temperature measurements obtained from the nitrogen part of the dual-pump CARS system were investigated in detail in near-adiabatic hydrogen/air/CO(2) flames. The precision. of the CARS temperature measurements was found to be comparable to the best results reported. In the literature for conventional two-laser, single-pump CARS. The application of dual-pump CARS for single.-shot measurements in,a swirl-stabilized combustor fueled with JP-8 was also demonstrated. C1 Innovat Sci Solut Inc, Dayton, OH 45440 USA. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. Australian Natl Univ, Canberra, ACT 0200, Australia. Sandia Natl Labs, Livermore, CA 94551 USA. RP Lucht, RP (reprint author), Purdue Univ, Sch Mech Engn, 585 Purdue Mall, W Lafayette, IN 47907 USA. EM Lucht@purdue.edu NR 44 TC 20 Z9 20 U1 0 U2 7 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0001-1452 J9 AIAA J JI AIAA J. PD APR PY 2003 VL 41 IS 4 BP 679 EP 686 DI 10.2514/2.1998 PG 8 WC Engineering, Aerospace SC Engineering GA 663VW UT WOS:000182027900013 ER PT J AU Landrum, ML Ornstein, DL AF Landrum, ML Ornstein, DL TI Hypertrophic osteoarthropathy associated with metastatic phyllodes tumor SO AMERICAN JOURNAL OF CLINICAL ONCOLOGY-CANCER CLINICAL TRIALS LA English DT Article DE hypertrophic osteoarthropathy; digital clubbing; metastatic phyllodes tumor; platelet-derived growth factor ID GROWTH-FACTOR EXPRESSION; PULMONARY OSTEOARTHROPATHY; FIBROBLAST PROLIFERATION; RECEPTOR EXPRESSION; FACTOR-B; PDGF; DISEASE; BREAST; CANCER; CARCINOMA AB Hypertrophic ostcoarthropathy (HOA) is a paraneoplastic syndrome consisting of digital clubbing, polyarthralgias, and periostosis that sometimes accompanies primary bronchogenic carcinoma and other pulmonary malignancies. We report a case of HOA as the initial manifestation of pulmonary metastases in a 42-year-old woman with malignant phyllodes tumor of the breast. Since the treatment for malignancy-associated HOA is targeted at the underlying neoplasm, it is important to make the diagnosis in a timely fashion so that appropriate therapy may be initiated without delay. HOA symptoms generally improve, as they did in our patient, if the cancer responds to treatment. The pathophysiology of HOA is poorly understood, but a role for tumor-associated Immoral mediators has been postulated. The hypothesized mechanisms underlying HOA are reviewed, and evidence for a prominent role for platelet-derived growth factor in mediating this syndrome is examined. This unusual case illustrates the importance of suspecting HOA in a patient with a history of cancer who presents with otherwise unexplained polyarthralgias. C1 Wilford Hall USAF Med Ctr, MMIMR, Lackland Air Force Base, San Antonio, TX 78236 USA. RP Landrum, ML (reprint author), Wilford Hall USAF Med Ctr, MMIMR, Lackland Air Force Base, 2200 Bergquist Dr,59MDW, San Antonio, TX 78236 USA. NR 42 TC 3 Z9 3 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0277-3732 J9 AM J CLIN ONCOL-CANC JI Am. J. Clin. Oncol.-Cancer Clin. Trials PD APR PY 2003 VL 26 IS 2 BP 146 EP 150 DI 10.1097/00000421-200304000-00009 PG 5 WC Oncology SC Oncology GA 672KQ UT WOS:000182520100009 PM 12714885 ER PT J AU Black, IH Holbrook, H Weesner, K AF Black, IH Holbrook, H Weesner, K TI Are labor epidurals less safe without an in house twenty-four hour anesthesia service? SO ANESTHESIOLOGY LA English DT Meeting Abstract CT 35th Annual Meeting of the Society-for-Obstetric-Anesthesia-and-Perinatology CY MAY 14-17, 2003 CL PHOENIX, ARIZONA SP Soc Obstetric Anesthesia Perinatol C1 Irwin Community Hosp, Dept Anesthesia, Ft Riley, KS USA. Wilford Hall USAF Med Ctr, Dept Anesthesia, Lackland AFB, TX 78236 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0003-3022 J9 ANESTHESIOLOGY JI Anesthesiology PD APR PY 2003 VL 98 SU S MA A77 BP 38 EP 38 PG 1 WC Anesthesiology SC Anesthesiology GA 662VQ UT WOS:000181969900076 ER PT J AU England, RW Ho, TC Napoli, DC Quinn, JM AF England, RW Ho, TC Napoli, DC Quinn, JM TI Inpatient consultation of allergy/immunology in a tertiary care setting SO ANNALS OF ALLERGY ASTHMA & IMMUNOLOGY LA English DT Article ID ANAPHYLAXIS AB Background: Few studies examine the referral patterns for allergy/immunology (All) inpatient consultation. Objective: The purpose of this study was to examine the primary reason and trends for A/I inpatient consultation to improve fellowship training. Methods: We performed a retrospective chart review of all inpatient All consults from July 1, 1987 to June 30, 2001 to determine the primary reason for consultation. We also reviewed trends in the total admissions and the average daily patient load compared with All consultation. Results: A total of 1,284 A/I inpatient consults were reviewed. Thirty-six percent (460 of 1,284) of inpatient consults were for evaluation of adverse drug reactions, 21% (270 of 1,284) asthma, 21% (272 of 1,284) miscellaneous reasons, 8% (109 of 1,284) possible immunodeficiency, 7% (93 of 1,284) angioedema/urticaria, and 6% (80 of 1,284) anaphylaxis. Our results demonstrated a fall in inpatient consults that correlated with a similar fall in total hospital admissions. The ratio of All inpatient consults to total admissions remained constant. Additionally, the ratio of All consults to average daily patient load increased over the study period. There was a decrease in asthma and adverse drug reaction consults, whereas immunodeficiency and anaphylaxis referrals remained stable. Conclusions: Identifying the most common reasons for inpatient consultation provides a guide for the education of A/I fellows and primary care residents. Inpatient consultation continues to play a crucial role in A/I training as it provides unique opportunities to evaluate serious life threatening diseases. An unchanged trend of consultation for immunodeficiency and anaphylaxis reaffirms the importance of the allergist/immunologist as a valuable resource for inpatient consultation. C1 Wilford Hall USAF Med Ctr, Dept Allergy Immunol, Lackland AFB, TX 78236 USA. RP England, RW (reprint author), Wilford Hall USAF Med Ctr, Dept Allergy Immunol, 759 MDOS-MMIA,2200 Bergquist Dr,Ste 1, Lackland AFB, TX 78236 USA. NR 12 TC 13 Z9 13 U1 0 U2 0 PU AMER COLL ALLERGY ASTHMA IMMUNOLOGY PI ARLINGTON HTS PA 85 WEST ALGONQUIN RD SUITE 550, ARLINGTON HTS, IL 60005 USA SN 1081-1206 J9 ANN ALLERG ASTHMA IM JI Ann. Allergy Asthma Immunol. PD APR PY 2003 VL 90 IS 4 BP 393 EP 397 PG 5 WC Allergy; Immunology SC Allergy; Immunology GA 670RZ UT WOS:000182423900007 PM 12722960 ER PT J AU Nugent, JS Quinn, JM McGrath, CA Hrncir, DE Boleman, WT Freeman, TM AF Nugent, JS Quinn, JM McGrath, CA Hrncir, DE Boleman, WT Freeman, TM TI Determination of the incidence of sensitization after penicillin skin testing SO ANNALS OF ALLERGY ASTHMA & IMMUNOLOGY LA English DT Article ID BETA-LACTAM ANTIBIOTICS; ALLERGY; HYPERSENSITIVITY; RESENSITIZATION AB Background: Concerns for sensitization after penicillin skin testing are a factor in limiting the timing and population for whom this testing is offered. The sensitizing potential of the penicillin skin test has never been studied directly. Methods: A total of 329 volunteers underwent prick and intradermal skin testing with penicillin G, benzylpenicilloylpolylysine, and a minor determinant mixture. Those with negative skin testing had repeat testing 4 weeks later. Medical history and antibiotic use were determined by interview, questionnaire, and electronic pharmacy records. Results: Seventy-two of the 329 subjects (22%) reported a history of previous beta-lactam reaction, of which 10 (14%) had a positive initial skin test. Overall, the initial skin test was positive in 23 of 329 (7%). Of the subjects with a negative initial skin test, 239 completed the second test 4 weeks later. Of these, 6 subjects (2.5%, 95% confidence interval 0.5% to 4.5%) converted to a positive skin test. None had taken a beta-lactam antibiotic between the two tests, and none had any previous history of beta-lactam reaction. One subject reported having never taken a beta-lactam antibiotic before. In comparison to the 233 subjects who did not convert their skin test, the statistically significant factors favoring, sensitization were: female sex (odds ratio [OR] 6.53, P = 0.05), atopy (OR 5.31, P = 0.04), and history of food allergy (OR 6.35, P = 0.02). There was a trend toward more recent penicillin use in the newly sensitized subjects, but this was not statistically significant. Conclusion: Penicillin skin testing may sensitize a small number of individuals to penicillin. C1 Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. RP Nugent, JS (reprint author), Wilford Hall USAF Med Ctr, 59 MDW-MMIA,2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA. NR 19 TC 15 Z9 16 U1 1 U2 1 PU AMER COLL ALLERGY ASTHMA IMMUNOLOGY PI ARLINGTON HTS PA 85 WEST ALGONQUIN RD SUITE 550, ARLINGTON HTS, IL 60005 USA SN 1081-1206 J9 ANN ALLERG ASTHMA IM JI Ann. Allergy Asthma Immunol. PD APR PY 2003 VL 90 IS 4 BP 398 EP 403 PG 6 WC Allergy; Immunology SC Allergy; Immunology GA 670RZ UT WOS:000182423900008 PM 12722961 ER PT J AU Ritter, MSE Meffert, CJ AF Ritter, MSE Meffert, CJ TI Successful treatment of flat warts using intralesional Candida antigen SO ARCHIVES OF DERMATOLOGY LA English DT Letter ID INJECTION RP Ritter, MSE (reprint author), 2200 Berquist Dr,Suite 1,759 MDOS-MMID, Lackland AFB, TX 78236 USA. NR 5 TC 2 Z9 2 U1 0 U2 1 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 USA SN 0003-987X J9 ARCH DERMATOL JI Arch. Dermatol. PD APR PY 2003 VL 139 IS 4 BP 541 EP 542 PG 2 WC Dermatology SC Dermatology GA 666GC UT WOS:000182167900022 ER PT J AU Mair, EA Battiata, A Casler, JD AF Mair, EA Battiata, A Casler, JD TI Endoscopic laser-assisted excision of juvenile nasopharyngeal angiofibromas SO ARCHIVES OF OTOLARYNGOLOGY-HEAD & NECK SURGERY LA English DT Article ID INTRACRANIAL EXTENSION; RADIATION-THERAPY; SURGERY AB Background: juvenile nasopharyngeal angiofibromas (JNAs) are highly vascular tumors that originate in the nasopharynx of young males. The primary treatment is surgical excision. Traditional surgical approaches are associated with significant morbidity and facial deformity. We introduce and outline the clinical advantages of an endoscopic surgical approach to JNAs using the Nd:YAG laser with image guided surgery. Design: Case series. Setting: Tertiary care medical center. Patients and Methods: Our study included 5 male patients (age range, 8-21 years) with extensive JNAs. Their tumors were large and ranged from Fisch stage IIA to IIIA. Embolization of tumor-feeding vessels was performed before surgery. The tumors were photocoagulated via a transnasal endoscopic approach using a Nd:YAG laser. Devascularized, lased tumor was removed with a micro-debrider. Image-guided navigation systems were used to assist skull base tumor removal, and sublabial and buccolabial incisions were used as needed to gain lateral endoscopic tumor access. Endoscopic tumor margins were obtained for frozen section. Results: All patients achieved symptomatic remission, with no complications. No blood transfusions were necessary. The patients were ready for discharge 1 to 2 days after surgery. Postoperative and magnetic resonance imaging scans showed 2 skull base recurrences, which were removed endoscopically. Follow-up ranged between 2 and 3 years. Conclusions: Traditional external surgical approaches to large JNAs may result in significant morbidity. Laser-assisted image-guided endoscopic excision of JNAs is a safe and effective minimally invasive surgical treatment. Its distinct advantages include (1) diminished blood loss, (2) superior cosmesis without observed altered facial growth (3) direct access of skull base with minimal morbidity, and (4) ease of endoscopic follow-up. C1 Walter Reed Army Med Ctr, Otolaryngol Serv, Washington, DC 20307 USA. RP Mair, EA (reprint author), USAF, Ctr Med, Dept Pediat & Otolaryngol, Wilford Hall, San Antonio, TX USA. NR 24 TC 27 Z9 33 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 USA SN 0886-4470 J9 ARCH OTOLARYNGOL JI Arch. Otolaryngol. Head Neck Surg. PD APR PY 2003 VL 129 IS 4 BP 454 EP 459 DI 10.1001/archotol.129.4.454 PG 6 WC Otorhinolaryngology; Surgery SC Otorhinolaryngology; Surgery GA 665TK UT WOS:000182137200011 PM 12707194 ER PT J AU Redman, RO Feldman, PA Wyrowski, F Cote, S Carey, SJ Egan, MP AF Redman, RO Feldman, PA Wyrowski, F Cote, S Carey, SJ Egan, MP TI Interactions between a bright young stellar object and the Midcourse Space Experiment infrared-dark cloud G79.3+0.3: An early stage of triggered star formation? SO ASTROPHYSICAL JOURNAL LA English DT Article DE dust, extinction; ISM : clouds; stars : formation; stars : pre-main-sequence ID HERBIG-AE/BE STARS; GALACTIC PLANE; SCUBA; EMISSION AB Millimeter and mid-infrared observations have been made of the dense clumps of dust and gas and of young stellar objects (YSOs) associated with the bright, compact submillimeter source G79.3+0.3 P1 in the relatively nearby MSX infrared-dark cloud G79.3+0.3. The Gemini mid-infrared observations reported here indicate the presence of three YSOs within the cloud. BIMA 3 mm continuum observations show that the brightest of the YSOs is likely to be a Herbig Ae/Be star. High angular resolution molecular line observations suggest that a wind from this star may be triggering collapse in the adjacent molecular cloud. The submillimeter source G79.3+0.3 P1 itself does not contain infrared sources and may represent an earlier stage of star formation. C1 Natl Res Council Canada, Victoria, BC V9E 2E7, Canada. Univ Maryland, Astron Program, College Pk, MD 20742 USA. Boston Coll, Inst Sci Res, Chestnut Hill, MA 02467 USA. USAF, Res Lab, VSBC, Hanscom AFB, MA 01731 USA. RP Redman, RO (reprint author), Natl Res Council Canada, 5071 W Saanich Rd, Victoria, BC V9E 2E7, Canada. EM russell.redman@nrc.ca; paul.feldman@nrc.ca; wyrowski@mpifr.bonn.mpg.de; stephanie.cote@nrc.ca; carey@ipac.caltech.edu; michael.egan@mda.osd.mil NR 24 TC 36 Z9 37 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD APR 1 PY 2003 VL 586 IS 2 BP 1127 EP 1135 DI 10.1086/367823 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 658GP UT WOS:000181713500028 ER PT J AU Balldin, UI Werchan, PM French, J Self, B AF Balldin, UI Werchan, PM French, J Self, B TI Endurance and performance during multiple intense high plus Gz exposures with effective anti-G protection SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article DE acceleration; high G; fatigue; G protection; anti-G suit AB Background: In many high-intensity wartime scenarios, pilots may be required to fly multiple, strenuous missions during the same day. Hypothesis: New anti-G protection allows fighter pilots to endure multiple high +Gz exposures during several sorties in a limited time interval. Methods: Nine well-trained centrifuge subjects were exposed to tactical aerial combat maneuvers using balanced pressure breathing during G (PBG) and an extended coverage anti-G suit. The centrifuge exposures consisted of five simulated sorties during a 4-h period, each consisting of four engagements with rapid onset cycles (6 G . s(-1)) varying between +4 Gz and +9 Gz. The subjects executed a tracking task before, during, and after each engagement and verbally indicated their effort level. Neck muscle strength was measured before and after the test. Results: Seven of the nine subjects could endure all five sorties during the 4-h period. On a scale from 0 (no effort) to 11 (maximum possible effort), highest effort level during runs varied from 5.5 to 11 units (mean 8.7). Maximal heart rate varied from 140-173 bpm (mean 159) and minimum finger oxygen saturation from 75-93% (mean 88). Maximal peripheral and central light-loss varied from 0 to 100% (mean 71 and 40, respectively). Three G-LOCs (two in the same subject) and four cases of near loss of consciousness occurred. The general fatigue recovery time varied from 9 to 48 h (mean 2 1). The tracking tests showed that performance deteriorated significantly during all G exposures; the neck muscle contraction was impaired by 12% (p = 0.035) after the G exposures. Conclusion: It is possible to train subjects to withstand five simulated flight sorties during a 4-h period with a total of up to 80 peaks to +9 Gz and 80 peaks to +8 Gz using PBG and an extended coverage anti-G suit. C1 USAF, Res Lab, Biodynam & Protect Div, Brooks AFB, TX USA. RP Balldin, UI (reprint author), Wyle Labs Inc, AFRL, HEP, 2485 Gillingham Dr, Brooks AFB, TX 78235 USA. NR 12 TC 12 Z9 12 U1 1 U2 1 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD APR PY 2003 VL 74 IS 4 BP 303 EP 308 PG 6 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA 662KL UT WOS:000181945800001 PM 12688446 ER PT J AU Pickard, BJ AF Pickard, BJ TI Altitude decompression sickness in a pilot wearing a pressure suit above 70,000 feet SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article DE U-2; case report AB U-2 pilots are at an increased risk of decompression sickness compared with other aviators in the U.S. Air Force. This is due to the extreme altitudes at which the missions take place. Presented here is a case of decompression sickness that occurred in a U-2 pilot who was wearing a full-pressure suit while flying at an altitude greater than 70,000 ft, with a pressurized cabin altitude of 29,200 ft. This case demonstrates the continued need for pilot education and awareness of DCS risk factors and symptoms. C1 9th Med Grp, Beale AFB, CA 95903 USA. RP Pickard, BJ (reprint author), 9th Med Grp, 15301 Warren Shingle Rd, Beale AFB, CA 95903 USA. NR 7 TC 7 Z9 7 U1 1 U2 2 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD APR PY 2003 VL 74 IS 4 BP 357 EP 359 PG 3 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA 662KL UT WOS:000181945800011 PM 12688456 ER PT J AU Casebeer, WD Parco, JE AF Casebeer, WD Parco, JE TI To have and to eat cake: The biscriptive role of game-theoretic explanations of human choice behavior SO BEHAVIORAL AND BRAIN SCIENCES LA English DT Editorial Material AB Game-theoretic explanations of behavior need supplementation to be descriptive; behavior has multiple causes, only some governed by traditional rationality. An evolutionarily informed theory of action countenances overlapping causal domains: neurobiological, psychological, and rational. Colmans discussion is insufficient because he neither evaluates learning models nor qualifies under what conditions his propositions hold. Still, inability to incorporate emotions in axiomatic models highlights the need for a comprehensive theory of functional rationality. C1 USAF Acad, Dept Philosophy, Colorado Springs, CO 80840 USA. Amer Embassy, IL-63903 Tel Aviv, Israel. RP Casebeer, WD (reprint author), USAF Acad, Dept Philosophy, Colorado Springs, CO 80840 USA. EM william.casebeer@usafa.af.mil; james.parco@usafa.af.mil RI Parco, James/I-4836-2012 NR 11 TC 0 Z9 0 U1 2 U2 2 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA SN 0140-525X J9 BEHAV BRAIN SCI JI Behav. Brain Sci. PD APR PY 2003 VL 26 IS 2 BP 159 EP + PG 9 WC Psychology, Biological; Behavioral Sciences; Neurosciences SC Psychology; Behavioral Sciences; Neurosciences & Neurology GA 843XR UT WOS:000223121100008 ER PT J AU Pakhomov, AG Doyle, J Stuck, BE Murphy, MR AF Pakhomov, AG Doyle, J Stuck, BE Murphy, MR TI Effects of high power microwave pulses on synaptic transmission and long term potentiation in hippocampus SO BIOELECTROMAGNETICS LA English DT Article DE high power microwave pulses; specific effects; hippocampal slices; LTP ID SLICES; TEMPERATURE; RATS; IRRADIATION; RADIATION; ADENOSINE AB Effects of short, extremely high power microwave pulses (EHPP) on neuronal network function were explored by electrophysiological techniques in the isolated rat hippocampal slice model. Population spikes (PS) in the CA1 area were evoked by repeated stimulation (1 per 30 s) of the Schaffer collateral pathway. A brief tetanus (2 s at 50 Hz) was used to induce long term potentiation (LTP) of synaptic transmission. In three different series of experiments with a total of 160 brain slices, the EHPP irradiation was performed before, during, or after the tetanus. The EHPP carrier frequency was 9.3 GHz, the pulse width and repetition rate were from 0.5 to 2 mus and from 0.5 to 10 Hz, respectively, and the peak specific absorption rate (SAR) in brain slices reached up to 500 MW/kg. Microwave heating of the preparation ranged from 0.5 degreesC (at 0.3 kW/kg time average SAR) to 6 degreesC (at 3.6 kW/kg). The experiments established that the only effect caused by EHPP exposure within the studied range of parameters was a transient and fully reversible decrease in the PS amplitude. Recovery took no more than a few minutes after the cessation of exposure and return to the initial temperature. This effect's features were characteristic of an ordinary thermal response: it was proportional to the temperature rise but not to any specific parameter of EHPP, and it could also be induced by a continuous wave (CW) irradiation or conventional heating. Irradiation did not affect the ability of neurons to develop LTP in response to tetanus or to retain the potentiated state that was induced before irradiation. No lasting or delayed effects of EHPP were observed. The results are consistent with the thermal mechanism of EHPP action and thus far provided no indication of EHPP-specific effects on neuronal function. Published 2003 Wiley-Liss, Inc.(dagger) C1 Mckesson BioServ Corp, Brooks AFB, San Antonio, TX 78235 USA. USA, Med Res Detachment, Walter Reed Army Inst Res, Brooks AFB, San Antonio, TX USA. USAF, Directed Energy Bioeffects Div, Human Effectiveness Directorate, Res Lab,Brooks AFB, San Antonio, TX USA. RP Pakhomov, AG (reprint author), Mckesson BioServ Corp, Brooks AFB, 8308 Hawks Rd,Bldg 1168, San Antonio, TX 78235 USA. EM andrei.pakhomov@brooks.af.mil NR 26 TC 16 Z9 25 U1 0 U2 2 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0197-8462 J9 BIOELECTROMAGNETICS JI Bioelectromagnetics PD APR PY 2003 VL 24 IS 3 BP 174 EP 181 DI 10.1002/bem.10079 PG 8 WC Biology; Biophysics SC Life Sciences & Biomedicine - Other Topics; Biophysics GA 661GV UT WOS:000181883600004 PM 12669300 ER PT J AU England, RW Nugent, JS Grathwohl, KW Hagan, L Quinn, JM AF England, RW Nugent, JS Grathwohl, KW Hagan, L Quinn, JM TI High-dose inhaled fluticasone and delayed hypersensitivity skin testing SO CHEST LA English DT Article DE anergy; delayed-type hypersensitivity; inhaled corticosteroids; purified protein derivative testing ID HOSPITALIZED-PATIENTS; PROPIONATE; VOLUNTEERS; INFECTION; CHILDREN; ASTHMA; GROWTH AB Introduction: Systemic steroids have been associated with anergy. Treatment with high-dose inhaled steroids has many documented systemic side effects, including adrenal suppression, reduction in growth velocity, and increased bone metabolism; however, little is known about their effect on delayed-type hypersensitivity (DTH). Study objectives: The purpose of this study was to determine if a 28-day course of high-dose inhaled fluticasone suppresses DTH to a standard panel of antigens. Methods: Forty-five healthy, steroid-naive subjects volunteered for this randomized, double-blinded, placebo-controlled trial. All subjects bad baseline DTH assessed by intradeimal skin testing to a standard panel of antigens (tetanus, candida, mumps, and tuberculin) read 72 h after placement. Subjects were then randomized to receive placebo or high-dose inhaled fluticasone (880 mug/d) for 28 days, after which a second DTH panel was performed. A third DTH panel was performed after a 30-day washout period. Measurements and results: Of the 45 enrolled subjects, 38 subjects completed the study, including 20 subjects in the placebo group and 18 subjects in the drug group. There was no significant difference in the amount of induration between drug and placebo groups for any of the three periods tested. Conclusion: Twenty-eight days of treatment with high-dose inhaled fluticasone did not suppress DTH in healthy volunteers. C1 USAF, Med Ctr, San Antonio, TX 78236 USA. RP England, RW (reprint author), USAF, Med Ctr, 759MDOS-MMIA,2200 Bergquist Dr,Ste 1,Wilford Hall, San Antonio, TX 78236 USA. NR 17 TC 7 Z9 7 U1 0 U2 0 PU AMER COLL CHEST PHYSICIANS PI NORTHBROOK PA 3300 DUNDEE ROAD, NORTHBROOK, IL 60062-2348 USA SN 0012-3692 J9 CHEST JI Chest PD APR PY 2003 VL 123 IS 4 BP 1014 EP 1017 DI 10.1378/chest.123.4.1014 PG 4 WC Critical Care Medicine; Respiratory System SC General & Internal Medicine; Respiratory System GA 668TA UT WOS:000182308200014 PM 12684288 ER PT J AU Watson, KA Lyons, KM Donbar, JM Carter, CD AF Watson, KA Lyons, KM Donbar, JM Carter, CD TI On scalar dissipation and partially premixed flame propagation SO COMBUSTION SCIENCE AND TECHNOLOGY LA English DT Article DE lifted flame; flame stabilization; laser diagnostics; partially premixed combustion ID JET DIFFUSION FLAMES; TURBULENT-JET; TRIPLE FLAMES; STABILIZATION AB Measurements of the scalar dissipation rate in the region immediately upstream of a lifted jet flame are presented. The scalar dissipation is determined in this isothermal region from a planar measurement of a two-dimensional conserved scalar (jet fluid) using laser Rayleigh scattering. Fields of the scalar dissipation rate are presented in addition to tabulated values for three different liftoff heights (Re-d = 4800; 6400, and 8300). Scalar dissipation rates do not reach levels thought to cause extinction of the leading edge based on comparison with extinction data for counterflow diffusion flames. Additionally, results are presented on the axial flame propagation velocities relative to the jet flow. The data indicate that over the three flow conditions, the flame velocity relative to the flow is approximately constant during the case of a quasi-stationary lifted flame. In light of these findings, it is suggested that concepts involving partially premixed flame propagation, rather than those of critical scalar dissipation rate, are central to modern lifted flame stabilization models. C1 N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA. USAF, Res Lab, AFRL PRA, Wright Patterson AFB, OH USA. RP Lyons, KM (reprint author), N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA. NR 24 TC 19 Z9 19 U1 0 U2 5 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0010-2202 J9 COMBUST SCI TECHNOL JI Combust. Sci. Technol. PD APR PY 2003 VL 175 IS 4 BP 649 EP 664 DI 10.1080/00102200390196386 PG 16 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical SC Thermodynamics; Energy & Fuels; Engineering GA 662CU UT WOS:000181929300002 ER PT J AU Kim, BW Mayer, AH AF Kim, BW Mayer, AH TI Influence of fiber direction and mixed-mode ratio on delamination fracture toughness of carbon/epoxy laminates SO COMPOSITES SCIENCE AND TECHNOLOGY LA English DT Article DE mixed-mode bending (MMB) ID UNIDIRECTIONAL GLASS/EPOXY COMPOSITES; BEAM ANALYSIS; INTERLAMINAR FRACTURE; FAILURE CRITERIA; I FRACTURE; SPECIMENS; JOINTS; TESTS AB Surface free energy has been often treated as a scalar constant without considering its dependence on propagation direction. It is desirable, however, to investigate how surface free energy or fracture toughness of delamination in a single interface varies with both the local mismatch angle of fiber directions and the direction of crack propagation in polymeric laminate composites. As a materials constant, fracture toughness is effectively used for various mechanical analyses of fiber-reinforced composites as well as conventional materials. This study investigates quantitatively and qualitatively the dependence of delamination fracture toughness on mismatch angle and crack propagation direction in laminated structures. AS4-Carbon/Epoxy prepregs were used for fabricating test specimens, and 50 different mismatch angles of fiber direction were applied on the delaminated interface of laminates. Fracture toughness was measured using the Mixed-mode Bending (MMB) test. This test method is composed of fracture mode-I and mode-II, and the mixed-mode ratio (G(II)/G) can be controlled. The mixed-mode ratios used here were 20, 35, 50, 65, and 80%. The crack path and the delamination fracture toughness were observed and calculated for specimens, and the dependence of the toughness was shown to be related to the mismatch angle of ply fibers at the delaminated interface. The relationship between mismatch angle and delamination fracture toughness was newly revealed and discussed for various angles. These results can be usefully applied to various fracture mechanics analyses in fiber-reinforced laminated composites. Published by Elsevier Science Ltd. C1 USAF, Res Lab, Air Vehicle Directorate, Struct Design & Dev Branch, Wright Patterson AFB, OH 45433 USA. RP Kim, BW (reprint author), USAF, Res Lab, Air Vehicle Directorate, Struct Design & Dev Branch, Wright Patterson AFB, OH 45433 USA. NR 32 TC 43 Z9 43 U1 3 U2 12 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0266-3538 J9 COMPOS SCI TECHNOL JI Compos. Sci. Technol. PD APR PY 2003 VL 63 IS 5 BP 695 EP 713 AR PII S0266-3538(02)00258-0 DI 10.1016/S0266-3538(02)00258-0 PG 19 WC Materials Science, Composites SC Materials Science GA 655ZY UT WOS:000181584800010 ER PT J AU Derdak, S AF Derdak, S TI High-frequency oscillatory ventilation for acute respiratory distress syndrome in adult patients SO CRITICAL CARE MEDICINE LA English DT Article; Proceedings Paper CT Margaux Conference on Critical Illness CY NOV 13-17, 2002 CL SINTRA, PORTUGAL DE acute respiratory distress syndrome; high-frequency oscillatory ventilation; high-frequency oscillation; mechanical ventilation; ventilator-induced lung injury ID ACUTE LUNG INJURY; CONVENTIONAL MECHANICAL VENTILATION; CLINICAL-PRACTICE GUIDELINES; INHALED NITRIC-OXIDE; PRESSURE; VOLUME; FAILURE; MODEL; ARDS; OXYGENATION AB Introduction: High-frequency oscillatory ventilation (HFOV) using an open-lung strategy has been demonstrated to improve oxygenation in neonatal and pediatric respiratory failure, without increasing barotrauma. Animal studies using small (<4 mm) endotracheal tubes have shown reduced histopathologic evidence of lung injury and inflammatory mediator release, suggesting reduced ventilator-induced lung injury. Clinical Studies: During the last decade, case reports and observational studies of HFOV in patients failing conventional ventilation strategies have suggested improved oxygenation in adult patients with severe acute respiratory distress syndrome. These reports have also suggested that early (2 days) initiation of HFOV is more likely to result in survival than delayed initiation (>7 days). A recently published randomized, controlled trial in acute respiratory distress syndrome patients (n = 148) comparing HFOV with a pressure-control ventilation strategy (PaO2/FIO2 ratio of less than or equal to200 mm Hg on positive end-expiratory pressure of >10 cm H2O) demonstrated early (<16 hrs) improvement in PaO2/FiO(2) (p =.008) in the HFOV group but no significant difference in oxygenation index between the two groups during the initial 72 hrs of treatment. Thirty-day mortality was 37% in the HFOV group 52% in the conventional ventilation group (p=.102). There was no significant difference between treatment groups in the prevalence of barotrauma, hemodynamic instability, or mucus plugging. This study suggests that HFOV is as effective and safe as the conventional strategy to which it was compared. Clinical Application: For clinical use in adults, a trial of HFOV may be considered when FIO2 requirements exceed 60% and mean airway pressure is approaching 20 cm H2O or higher (or, alternatively, positive end-expiratory pressure of >15 cm H2O). It is currently unknown whether initiating HFOV at a lower severity threshold would result in reduced ventilator-associated lung injury or mortality. Future Directions: Future studies should compare different algorithms of applying HFOV to determine the optimal techniques for achieving oxygenation and ventilation, while minimizing ventilator-associated lung injury. The potential role of adjunctive therapies used with HFOV (e.g., prone ventilation, inhaled nitric oxide, aerosolized vasodilators, liquid ventilation) will require further research. C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. RP Derdak, S (reprint author), Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. NR 57 TC 44 Z9 49 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0090-3493 J9 CRIT CARE MED JI Crit. Care Med. PD APR PY 2003 VL 31 IS 4 SU S BP S317 EP S323 DI 10.1097/01.CCM.0000057910.50618.EB PG 7 WC Critical Care Medicine SC General & Internal Medicine GA 672HG UT WOS:000182514700023 PM 12682459 ER PT J AU Baum, CE Stone, AP AF Baum, CE Stone, AP TI Generalized TEM, E, and H modes SO ELECTROMAGNETICS LA English DT Article DE TEM modes; transient lenses AB Previous papers have considered transient lenses for propagating TEM modes without dispersion. This paper considers the properties of E and H modes in such lenses. The presence of longitudinal field components brings in additional constraints on the allowable coordinate systems, limiting the cases of transient lenses supporting E and H modes to a subset of those supporting TEM modes. C1 USAF, Res Lab, Directed Energy Directorate, Kirtland AFB, NM USA. Univ New Mexico, Dept Math & Stat, Albuquerque, NM 87131 USA. RP Baum, CE (reprint author), Univ New Mexico, Dept Math, Albuquerque, NM 87131 USA. NR 15 TC 7 Z9 8 U1 0 U2 2 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 0272-6343 J9 ELECTROMAGNETICS JI Electromagnetics PD APR PY 2003 VL 23 IS 3 BP 203 EP 222 DI 10.1080/02726340390197476 PG 20 WC Engineering, Electrical & Electronic SC Engineering GA 669UN UT WOS:000182369000001 ER PT J AU Wilkins, T Hardy, H AF Wilkins, T Hardy, H TI The current state of Esophagogastroduodenoscopy training in family practice residency programs SO FAMILY MEDICINE LA English DT Article AB Background and Objectives: Esophagogastroduodenoscopy (EGD) is a useful diagnostic procedure to evaluate patients with upper gastrointestinal complaints. Although family physicians have demonstrated that they can competently perform EGD, only a minority of family physicians perform EGD. This study determined the current state of EGD training in US family practice residency programs and how often graduating residents seek EGD privileges. Methods: We conducted a cross-sectional descriptive study surveying program directors from all Accreditation Council for Graduate Medical Education-approved family practice residency programs regarding EGD training in their program. Results: Of the 471 surveys mailed, 441 (94%) were returned. A total of 143 (32%) program directors reported that their program offered EGD training, but only 58 (13%) actually trained at least one resident. Residents performed a mean of 20 +/- 2.4 EGDs per resident, and residents trained by family physicians performed more EGDs than residents trained by other specialties. In July 2000, .04% of graduating family practice residents sought credentials for EGD, and their training occurred in 32 (7%) residency programs. Conclusions: Only a minority of family practice residents seek credentialing after residency to perform EGD. C1 Med Coll Georgia, Dept Family Med, Augusta, GA 30912 USA. USAF, Elmendorf AFB, AK USA. RP Wilkins, T (reprint author), Med Coll Georgia, Dept Family Med, HB-4031, Augusta, GA 30912 USA. RI Wilkins, Thad/G-2541-2010 NR 11 TC 2 Z9 2 U1 0 U2 0 PU SOC TEACHERS FAMILY MEDICINE PI LEAWOOD PA 11400 TOMAHAWK CREEK PARKWAY, STE 540, LEAWOOD, KS 66207 USA SN 0742-3225 J9 FAM MED JI Fam. Med. PD APR PY 2003 VL 35 IS 4 BP 269 EP 272 PG 4 WC Primary Health Care; Medicine, General & Internal SC General & Internal Medicine GA 672LA UT WOS:000182521000015 PM 12729312 ER PT J AU Kirkland, LV Wright, RG AF Kirkland, LV Wright, RG TI Nanotechnology's impact on aircraft design and maintenance SO IEEE AEROSPACE AND ELECTRONIC SYSTEMS MAGAZINE LA English DT Article AB Unique research efforts relating to the development of Nanoscale devices to replace standard integrated circuits, and eventually entire electronic systems. Standard integrated circuits (IC) have limitations or restrictions in size, speed, reliability, complexity and finding suitable replacements for discontinued items. Nanoscale device development and understanding has dramatically grown. One of the key properties of quantum physics that quantum computers rely on is the ability of certain atoms or nuclei to work together as quantum bits. These computing devices are a fraction of the size of typical ICs (nanoscale). Nanoscale devices developed using quantum physics principles have unlimited potential to revolutionize the methods and design of fabricated printed circuit cards and complete systems. They can replace an entire PC board or the set of PC boards that comprise a Line Replaceable Unit (LRU). This would be a good and practical jumping-off point to going directly to the complete device, system, or function level. This might include a nanoscale computer (general purpose or flight control), transmitter, GPS receiver, position and/or attitude sensors in either a stand-alone configuration, or combined within conventional devices (e.g., a nanoscale communications suite (xmtr/rcvr, etc.) encapsulated within the Plexiglas canopy or the control yoke of an F16 rather than behind the instrument panel or maybe the whole comm suite into the pilot's helmet. C1 USAF, OO ALC TISAC, Colorado Springs, CO USA. RP Kirkland, LV (reprint author), USAF, OO ALC TISAC, Colorado Springs, CO USA. NR 6 TC 0 Z9 0 U1 1 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA SN 0885-8985 J9 IEEE AERO EL SYS MAG JI IEEE Aerosp. Electron. Syst. Mag. PD APR PY 2003 VL 18 IS 4 BP 9 EP 13 DI 10.1109/MAES.2003.1194083 PG 5 WC Engineering, Aerospace; Engineering, Electrical & Electronic SC Engineering GA 666EW UT WOS:000182164900002 ER PT J AU Kent, B AF Kent, B TI Introduction SO IEEE ANTENNAS AND PROPAGATION MAGAZINE LA English DT Editorial Material C1 USAF, Res Lab, SNS, Wright Patterson AFB, OH 45433 USA. RP Kent, B (reprint author), USAF, Res Lab, SNS, Bldg 254,2591 K St, Wright Patterson AFB, OH 45433 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA SN 1045-9243 J9 IEEE ANTENNAS PROPAG JI IEEE Antennas Propag. Mag. PD APR PY 2003 VL 45 IS 2 BP 153 EP 153 PG 1 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA 681VA UT WOS:000183055200026 ER PT J AU Van Veldhuizen, DA Zydallis, JB Lamont, GB AF Van Veldhuizen, DA Zydallis, JB Lamont, GB TI Considerations in engineering parallel multiobjective evolutionary algorithms SO IEEE TRANSACTIONS ON EVOLUTIONARY COMPUTATION LA English DT Article DE multiobjective evolutionary algorithms (MOEAs); parallel algorithm paradigms; parallel multiobjective evolutionary algorithms (pMOEAs); Pareto front; Pareto optimality ID GENETIC ALGORITHMS; OPTIMIZATION AB Developing multiobjective evolutionary algorithms (MOEAs) involves thoroughly addressing the issues of efficiency and effectiveness. Once convinced of an MOEA's effectiveness the researcher often desires to reduce execution time and/or resource expenditure, which naturally leads to considering the MOEA's parallelization. Parallel MOEAs (pMOEAs) or distributed MOEAs are relatively new developments with few associated publications. pMOEA creation is not a simple task, involving analyzing various parallel paradigms and associated parameters. Thus, a thorough discussion of the major parallelized MOEA paradigms is included in this paper and succinct observations are made regarding an analysis of the current literature. Specifically, a previous MOEA notation is extended into the pMOEA domain to enable precise description and identification of various sets of interest. Innovative concepts for pMOEA migration, replacement and niching schemes are discussed, as well as presenting the first known generic pMOEA formulation. Taken together, this paper's analyses in conjunction with an original pMOEA design serve as a pedagogical framework and example of the necessary process to implement an efficient and effective pMOEA. Interspersed throughout the paper are various methods for creating and evaluating pMOEA implementations for those interested in extending the field's knowledge through further research. This aids the community in not only achieving a fuller understanding of parallelized MOEAs, but also identifying appropriate contexts for comparing their performance. C1 USAF, Mat Command, Directorate Requirements, Wright Patterson AFB, OH 45433 USA. USAF, Inst Technol, Dept Elect & Comp Engn, Grad Sch Engn Management, Wright Patterson AFB, OH 45433 USA. RP USAF, Mat Command, Directorate Requirements, Wright Patterson AFB, OH 45433 USA. EM David.VanVeldhuizen@wpafb.af.mil; Jesse.Zydallis@afit.edu; Gary.Lamont@afit.edu NR 78 TC 104 Z9 106 U1 3 U2 10 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1089-778X EI 1941-0026 J9 IEEE T EVOLUT COMPUT JI IEEE Trans. Evol. Comput. PD APR PY 2003 VL 7 IS 2 BP 144 EP 173 DI 10.1109/TEVC.2003.810751 PG 30 WC Computer Science, Artificial Intelligence; Computer Science, Theory & Methods SC Computer Science GA 678GY UT WOS:000182859500005 ER PT J AU Chen, D Tsang, L Zhou, L Reising, SC Asher, WE Rose, LA Ding, KH Chen, CT AF Chen, D Tsang, L Zhou, L Reising, SC Asher, WE Rose, LA Ding, KH Chen, CT TI Microwave emission and scattering of foam based on Monte Carlo simulations of dense media SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING LA English DT Article DE dense-media radiative transfer; electromagnetic wave scattering; microwave emissivity; Monte Carlo simulations; ocean foam ID RADIATIVE-TRANSFER THEORY; SEA; SURFACE; MODEL AB The foam-covered ocean surface is treated as densely packed air bubbles coated with thin layers of seawater. We apply Monte Carlo simulations of solutions of Maxwell's equations to calculate the absorption, scattering, and extinction coefficients at 10.8 and 36.5 GHz. These quantities are then used in dense-media radiative transfer theory to calculate the microwave emissivity. Numerical results of the model are illustrated As a function of foam parameters. Results of emissivities for both horizontal polarization and vertical polarizations at 10.8 and 36.5 GHz are compared with recent experimental measurements. C1 City Univ Hong Kong, Dept Elect Engn, Hong Kong, Peoples R China. Univ Washington, Dept Elect Engn, Seattle, WA 98195 USA. Univ Massachusetts, Microwave Remote Sensing Lab, Amherst, MA 01003 USA. USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA. USAF, Res Lab, Bedford, MA 01731 USA. Intel Corp, Sacramento, CA 95827 USA. RP Chen, D (reprint author), City Univ Hong Kong, Dept Elect Engn, Hong Kong, Peoples R China. NR 16 TC 28 Z9 31 U1 1 U2 8 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0196-2892 J9 IEEE T GEOSCI REMOTE JI IEEE Trans. Geosci. Remote Sensing PD APR PY 2003 VL 41 IS 4 BP 782 EP 790 DI 10.1109/TGRS.2003.810711 PN 1 PG 9 WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote Sensing; Imaging Science & Photographic Technology SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science & Photographic Technology GA 688BN UT WOS:000183412500005 ER PT J AU Orson, JA Bagby, WF Perram, GP AF Orson, JA Bagby, WF Perram, GP TI Infrared signatures from bomb detonations SO INFRARED PHYSICS & TECHNOLOGY LA English DT Article DE bomb detonation; explosions; infrared spectra; signatures; Fourier transform infrared spectroscopy AB Remote observations of the temporal and spectral characteristics of the infrared emissions from bomb detonations have been correlated with explosion conditions. A Fourier transform interferometer was used to record spectra in the 1.6-20 mum range at spectral resolutions of 4-16 cm(-1) and temporal resolutions of 0.047-0.123 s. Field observations of 56 detonation events included a set of aircraft delivered ordinance and a series of static ground detonations for a variety of bomb sizes, types and environmental conditions. The emission is well represented by a gray body with continuously decreasing temperature and characteristic decay times of 1-4 s, providing only limited variability with detonation conditions. However, the fireball size times the emissivity as a function of time can be determined from the spectra without imaging and provides a more sensitive signature. The degree of temporal overlap as a function of frequency for a pair of detonation events provides a very sensitive discriminator for explosion conditions. The temporal overlap decreases with increasing emission frequency for all the observed events, indicating more information content at higher frequencies. (C) 2002 Elsevier Science B.V. All rights reserved. C1 USAF, Inst Technol, Dept Engn Phys, Wright Patterson AFB, OH 45433 USA. RP Perram, GP (reprint author), USAF, Inst Technol, Dept Engn Phys, 2950 P St, Wright Patterson AFB, OH 45433 USA. OI Perram, Glen/0000-0002-4417-3929 NR 11 TC 27 Z9 28 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1350-4495 J9 INFRARED PHYS TECHN JI Infrared Phys. Technol. PD APR PY 2003 VL 44 IS 2 BP 101 EP 107 AR PII S1350-4495(02)00188-3 DI 10.1016/S1350-4495(02)00188-3 PG 7 WC Instruments & Instrumentation; Optics; Physics, Applied SC Instruments & Instrumentation; Optics; Physics GA 638BA UT WOS:000180548000002 ER PT J AU Gaitonde, DV Visbal, MR AF Gaitonde, DV Visbal, MR TI Advances in the application of high-order techniques in simulation of multi-disciplinary phenomena SO INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS LA English DT Article DE computational fluid dynamics; multidisciplinary analysis; aerostructural interactions; magnetogasdynamics; acoustics ID FINITE-DIFFERENCE SCHEMES; NAVIER-STOKES EQUATIONS; IMPLICIT; FLOW AB This paper describes the development of a comprehensive high-fidelity algorithmic framework to simulate the three-dimensional fields associated with multi-disciplinary physics. A wide range of phenomena is considered, from aero-acoustics and turbulence to electromagnetics, non-linear fluid-structure interactions, and magnetogasdynamics. The scheme depends primarily on "spectral-like," up to sixth-order accurate compact-differencing and up to tenth-order filtering techniques. The tightly coupled procedure suppresses numerical instabilities commonly encountered with high-order methods on non-uniform meshes, near computational boundaries or in the simulation of nonlinear dynamics. Particular emphasis is placed on developing the proper metric evaluation procedures for three-dimensional moving and curvilinear meshes so that the advantages of higher-order schemes are retained in practical calculations. A domain-decomposition strategy based on finite-sized overlap regions and interface boundary treatments enables the development of highly scalable solvers. The utility of the method to simulate problems governed by widely disparate governing equations is demonstrated with several examples encompassing vortex dynamics, wave scattering, electro-fluid plasma interactions, and panel flutter. C1 USAF, Computat Sci Branch, Aeronaut Sci Div, Res Lab, Wright Patterson AFB, OH 45433 USA. RP Visbal, MR (reprint author), USAF, Computat Sci Branch, Aeronaut Sci Div, Res Lab, Wright Patterson AFB, OH 45433 USA. NR 30 TC 3 Z9 3 U1 2 U2 5 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1061-8562 J9 INT J COMPUT FLUID D JI Int. J. Comput. Fluid Dyn. PD APR PY 2003 VL 17 IS 2 BP 95 EP 106 DI 10.1080/1061856031000104842 PG 12 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 666YL UT WOS:000182204000001 ER PT J AU Perel, VY Palazotto, AN AF Perel, VY Palazotto, AN TI Dynamic geometrically nonlinear analysis of transversely compressible sandwich plates SO INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS LA English DT Article DE sandwich plate; layerwise theory; finite element formulation ID BEAMS AB In order to construct a plate theory for a thick transversely compressible sandwich plate with composite laminated face sheets, the authors make simplifying assumptions regarding distribution of transverse strain components in the thickness direction. The in-plane stresses sigma(xx), sigma(xy) and sigma(yy) (Fig. 1) are computed from the constitutive equations, and the improved values of transverse stress components sigma(xz), sigma(yz) and sigma(zz), need to be computed by integration of pointwise equations of motion in a post-process stage of the finite element analysis. The improved values of the transverse strains can also be computed in the post-process stage by substituting the improved transverse stresses into the constitutive relations. A problem of cylindrical bending of a simply supported plate under a uniform load on the upper surface is considered, and comparison is made between the displacements, the in-plane stress and the improved transverse stresses (obtained by integration of the pointwise equations of motion), computed from the plate theory, with the corresponding values of exact elasticity solutions. In this comparison, a good agreement of both solutions is achieved. In the finite element analysis of sandwich plates in cylindrical bending with small thickness-to-length ratios, the shear locking phenomenon does not occur. The model of a sandwich plate in cylindrical bending, presented in this paper, has a wider range of applicability than the models presented in literature so far: it can be applied to the sandwich plates with a wide range of ratios of thickness to the in-plane dimensions, with both thin and thick face sheets (as compared to the thickness of the core) and to the sandwich plates with both transversely rigid and transversely compressible face sheets and cores. Published by Elsevier Science Ltd. C1 USAF, Inst Tech, Wright Patterson AFB, OH 45433 USA. RP Palazotto, AN (reprint author), USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA. NR 24 TC 3 Z9 3 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0020-7462 J9 INT J NONLINEAR MECH JI Int. J. Non-Linear Mech. PD APR PY 2003 VL 38 IS 3 BP 337 EP 356 AR PII S0020-7462(01)00065-8 DI 10.1016/S0020-7462(01)00065-8 PG 20 WC Mechanics SC Mechanics GA 608NW UT WOS:000178853700004 ER PT J AU Paduano, Q Weyburne, D AF Paduano, Q Weyburne, D TI Two-step process for the metalorganic chemical vapor deposition growth of high quality AlN films on sapphire SO JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS LA English DT Article DE two-step MOCVD; AlN; sapphire substrate; X-ray diffraction ID PHASE EPITAXY; GAN; OVERGROWTH AB Epitaxial AlN films were deposited on (0001) sapphire using a new metalorganic chemical vapor deposition process in which optimal substrate nitridation is combined with modulated ammonia flow and a growth pressure reduction from 150 torr to 40 torr after the first stage of growth. A significant improvement in the full width half maximum (FWHM) of the rocking curves was obtained. The best layers had FWHM of 330 arc sec/650 arc sec for the (0002)/(10 (1) over bar2) reflections, respectively. C1 Air Force Res Lab, Sensors Directorate, Hanscom AFB, MA 01731 USA. RP Paduano, Q (reprint author), Air Force Res Lab, Sensors Directorate, 80 Scott Dr, Hanscom AFB, MA 01731 USA. NR 13 TC 33 Z9 33 U1 2 U2 19 PU INST PURE APPLIED PHYSICS PI MINATO-KU TOKYO PA DAINI TOYOKAIJI BLDG, 4-24-8 SHINBASHI, MINATO-KU TOKYO, 105-004, JAPAN SN 0021-4922 J9 JPN J APPL PHYS 1 JI Jpn. J. Appl. Phys. Part 1 - Regul. Pap. Short Notes Rev. Pap. PD APR PY 2003 VL 42 IS 4A BP 1590 EP 1591 DI 10.1143/JJAP.42.1590 PG 2 WC Physics, Applied SC Physics GA 678XQ UT WOS:000182892300021 ER PT J AU Nastrom, GD Eaton, FD AF Nastrom, GD Eaton, FD TI A case study of atmospheric conditions at 4-19 km over Vandenberg Air Force Base during passage of a cyclone SO JOURNAL OF APPLIED METEOROLOGY LA English DT Article ID VHF RADAR OBSERVATIONS; INERTIA-GRAVITY-WAVES; SANDS-MISSILE-RANGE; LOWER STRATOSPHERE; WHITE-SANDS; NEW-MEXICO; MU RADAR; TURBULENCE; TROPOSPHERE; DISSIPATION AB Continuous observations from a 50-MHz radar of the vertical profiles of winds, refractivity turbulence structure constant (C-n(2)), turbulent kinetic energy density (sigma(t)(2)), and hourly standard deviation of the vertical velocity (sigma(n) ) are combined with routine rawinsonde ascents and weather observations to study changes in turbulence intensity over Vandenberg Air Force Base, California, during 21-27 July 2001. Early and late in this period the flow aloft was relatively steady and turbulence intensities in the upper troposphere were very low. For about 36 h around 25 July, the flow at midlevels (about 600-150 hPa) was disturbed by the passage of a cutoff cyclonic circulation center. During the low's passage, C-n(2) and sigma(t)(2) intensities were enhanced by up to about 15 dB. The enhancements of C-n(2) and sigma(t)(2) are highly correlated with each other, as well as with the vertical shear of the horizontal wind and synoptic-scale relative vorticity. The increased turbulence intensities apparently are due to in situ processes, such as shear instabilities associated with the low. Brief episodes of enhanced sigma(w), taken as an indicator of enhanced gravity wave activity, are also associated with the low's passage, and they are also apparently due to an in situ process, such as shear instability or geostrophic adjustment. In the lower stratosphere, above 16 km, winds show a periodic oscillation, with a period near the local inertial period and with downward phase progression. There are bursts of enhanced C-n(2) near the lower edge of this oscillation. The oscillation does not appear to be affected by the low's passage. C1 St Cloud State Univ, Dept Earth & Atmospher Sci, St Cloud, MN 56301 USA. USAF, Res Lab, Kirtland AFB, NM USA. RP Nastrom, GD (reprint author), St Cloud State Univ, Dept Earth & Atmospher Sci, St Cloud, MN 56301 USA. NR 17 TC 8 Z9 8 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0894-8763 J9 J APPL METEOROL JI J. Appl. Meteorol. PD APR PY 2003 VL 42 IS 4 BP 467 EP 475 DI 10.1175/1520-0450(2003)042<0467:ACSOAC>2.0.CO;2 PG 9 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 654YJ UT WOS:000181524300002 ER PT J AU Bunning, TJ Jeon, HG Roy, AK Kearns, KM Farmer, BL Adams, WW AF Bunning, TJ Jeon, HG Roy, AK Kearns, KM Farmer, BL Adams, WW TI Polyurethane-infiltrated carbon foams: A coupling of thermal and mechanical properties SO JOURNAL OF APPLIED POLYMER SCIENCE LA English DT Article AB The thermal and mechanical properties of polyurethane-infiltrated carbon foam of various densities were investigated. By combining the high thermal conductivity of the carbon foam with the mechanical toughness of the pure polyurethane, a mechanically tough composite (relative to the unfilled foam) that could be used at higher temperatures than the polyurethane's degradation was formed. Both the tensile strength and the modulus increased by an order of magnitude for the composites compared to unfilled foam, while the compressive and shear strengths and moduli of the composites approached values exhibited by pure polyurethane. At both 300 and 400degreesC, the rectangular blocks of pure polyurethane lost their mechanical integrity due to decomposition in air. Thermogravimetric analysis confirms substantial initial weight loss above 290degreesC. Filled carbon foam blocks, however, maintain their mechanical integrity at both 300 and 400degreesC indefinitely, although the bulk of the rectangular block mass is polyurethane. Three different carbon foam densities are examined. As expected, the higher density foams show greater heat transfer. (C) 2003 Wiley Periodicals, Inc. J Appl Polym Sci 87:2348-2355,2003. C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Systran Inc, Dayton, OH 45433 USA. RP USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. EM timothy.bunning@wpafb.af.mil RI Adams, Wade/A-7305-2010 NR 17 TC 12 Z9 12 U1 1 U2 5 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0021-8995 EI 1097-4628 J9 J APPL POLYM SCI JI J. Appl. Polym. Sci. PD APR 1 PY 2003 VL 87 IS 14 BP 2348 EP 2355 DI 10.1002/app.11918 PG 8 WC Polymer Science SC Polymer Science GA 641PT UT WOS:000180754700020 ER PT J AU Arthur, W Bennett, W Edens, PS Bell, ST AF Arthur, W Bennett, W Edens, PS Bell, ST TI Effectiveness of training in organizations: A meta-analysis of design and evaluation features SO JOURNAL OF APPLIED PSYCHOLOGY LA English DT Article ID SELF-EFFICACY; WORK ORGANIZATIONS; LEARNING OUTCOMES; METAANALYSIS; MOTIVATION; ATTITUDES; SKILL; INTERVENTIONS; PERFORMANCE; ENVIRONMENT AB The authors used meta-analytic procedures to examine the relationship between specified training design and evaluation features and the effectiveness of training in organizations. Results of the meta-analysis revealed training effectiveness sample-weighted mean ds of 0.60 (k = 15, N = 936) for reaction criteria, 0.63 (k = 234, N = 15,014) for learning criteria, 0.62 (k = 122, N = 15,627) for behavioral criteria, and 0.62 (k = 26, N = 1,748) for results criteria. These results suggest a medium to large effect size for organizational training. In addition, the training method used, the skill or task characteristic trained, and the choice of evaluation criteria were related to the effectiveness of training programs. Limitations of the study along with suggestions for future research are discussed. C1 Texas A&M Univ, Dept Psychol, College Stn, TX 77843 USA. USAF, Res Lab, Warfighter Training Res Div, Mesa, AZ USA. RP Arthur, W (reprint author), Texas A&M Univ, Dept Psychol, College Stn, TX 77843 USA. NR 69 TC 244 Z9 251 U1 19 U2 126 PU AMER PSYCHOLOGICAL ASSOC PI WASHINGTON PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA SN 0021-9010 J9 J APPL PSYCHOL JI J. Appl. Psychol. PD APR PY 2003 VL 88 IS 2 BP 234 EP 245 DI 10.1037/0021-9010.88.2.234 PG 12 WC Psychology, Applied; Management SC Psychology; Business & Economics GA 667DF UT WOS:000182215000004 PM 12731707 ER PT J AU Nguyen, KA Pachter, R AF Nguyen, KA Pachter, R TI Jahn-Teller triplet excited state structures and spectra of zinc complexes of porphyrin and phthalocyanine: A density functional theory study SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID COMPACT EFFECTIVE POTENTIALS; MOLECULAR-ORBITAL METHODS; EXPONENT BASIS-SETS; GAUSSIAN-TYPE BASIS; ORGANIC-MOLECULES; SENSITIZED REDUCTION; EXCITATION-ENERGIES; ABSORPTION; PHOSPHORESCENCE; APPROXIMATION AB Density functional theory (DFT) electronic structure calculations were carried out to predict the triplet Jahn-Teller distorted structures and energetics for zinc complexes of porphyrin (ZnP), tetraazaporphyrin, tetrabenzoporphyrin, and phthalocyanine. The D-4h square planar structures in the ground state are found to distort along the b(1g) mode leading to the D-2h rectangle structures in the lowest triplet state. Time-dependent DFT calculations were also carried out to interpret the observed triplet-triplet spectra and to quantify the effects of meso-tetraaza substitutions and tetrabenzo annulations on ZnP. The computed triplet-triplet excitation energies and oscillator strengths are in good agreement with experiment. The effects of meso-tetraaza substitutions and tetrabenzo annulations on the triplet excited state structures and spectra are discussed in detail. C1 USAF, Res Lab, Mat & Mfg Directorate, AFRL MLPJ, Wright Patterson AFB, OH 45433 USA. RP Nguyen, KA (reprint author), USAF, Res Lab, Mat & Mfg Directorate, AFRL MLPJ, Wright Patterson AFB, OH 45433 USA. NR 36 TC 38 Z9 38 U1 0 U2 11 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 APR 1 PY 2003 VL 118 IS 13 BP 5802 EP 5810 DI 10.1063/1.1540627 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 657LF UT WOS:000181667900012 ER PT J AU Kaspi, R Donati, GP AF Kaspi, R Donati, GP TI Digital alloy growth in mixed As/Sb heterostructures SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 12th International Conference on Molecular Beam Epitaxy (MBE-XII) CY SEP 15-20, 2002 CL SAN FRANCISCO, CALIFORNIA DE InAs/GaSb superlattice; digital alloying; mixed As/Sb alloys ID MOLECULAR-BEAM EPITAXY; LASER; INAS AB We consider the digital alloy growth of mixed As/Sb layers by molecular beam epitaxy. Using the (InAs)(n)(GaSb)(3n) superlattice as an example, we determine an acceptable upper limit to the modulation period before significant deviation from the In(0.25)Ga(0.75)AS(0.25)Sb(0.75) bandgap occurs. We then consider the digital alloy growth of In0.2Ga0.8AsySb1-y layers on GaSb, and find that the digital alloying technique provides protection against compositional drift in the growth direction due to reduced sensitivity to variations in arsenic-flux and substrate temperature. (C) 2002 Elsevier Science B.V. All rights reserved. C1 USAF, Res Lab, Directed Energy Directorate, Adv Tact Syst Branch,AFRL,DELS,Kirtland AFB, Albuquerque, NM 87117 USA. Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA. RP Kaspi, R (reprint author), USAF, Res Lab, Directed Energy Directorate, Adv Tact Syst Branch,AFRL,DELS,Kirtland AFB, Albuquerque, NM 87117 USA. NR 11 TC 21 Z9 21 U1 3 U2 5 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 APR PY 2003 VL 251 IS 1-4 BP 515 EP 520 DI 10.1016/S0022-0248(02)02185-1 PG 6 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 666LY UT WOS:000182179800095 ER PT J AU Rotella, P Raghavan, S Stintz, A Fuchs, B Krishna, S Morath, C Le, D Kennerly, SW AF Rotella, P Raghavan, S Stintz, A Fuchs, B Krishna, S Morath, C Le, D Kennerly, SW TI Normal incidence InAs/InGaAs dots-in-well detectors with current blocking AlGaAs layer SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 12th International Conference on Molecular Beam Epitaxy (MBE-XII) CY SEP 15-20, 2002 CL SAN FRANCISCO, CALIFORNIA DE nanomaterials; molecular beam epitaxy; quantum dots; infrared detectors ID INAS/GAAS QUANTUM DOTS; INFRARED PHOTODETECTORS; MIDINFRARED PHOTOCONDUCTIVITY AB Normal incidence InAs/In0.15Ga0.85As dots-in-a-well detectors operating at T = 78 K with lambda(p) similar to 7 mum and a broad spectral width (Deltalambda/lambda) of 35% are reported. Effect of a current blocking AlGaAs layer on the device performance : is studied. Temperature-dependent dark current, spectral response and calibrated blackbody measurements were undertaken to determine the responsivity and detectivity of the detectors at 78 K. A correction factor was introduced to include the effect of scattering and reflections in the undoped substrate. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Univ New Mexico, Ctr High Technol Mat, Dept Elect & Comp Engn, Albuquerque, NM 87106 USA. USAF, Res Lab, AFRL VSSS, Kirtland AFB, NM 87117 USA. USA, Res Lab, Adelphi, MD 20783 USA. RP Krishna, S (reprint author), Univ New Mexico, Ctr High Technol Mat, Dept Elect & Comp Engn, Albuquerque, NM 87106 USA. RI Krishna, Sanjay /C-5766-2009; Morath, Christian/B-9147-2008 OI Morath, Christian/0000-0001-5838-9301 NR 19 TC 8 Z9 8 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD APR PY 2003 VL 251 IS 1-4 BP 787 EP 793 DI 10.1016/S0022-0248(02)02428-4 PG 7 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 666LY UT WOS:000182179800146 ER PT J AU Averett, KL Wu, X Koch, MW Wicks, GW AF Averett, KL Wu, X Koch, MW Wicks, GW TI Low-voltage InAsP/InAs HBT and metamorphic InAs BJT devices grown by molecular beam epitaxy SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 12th International Conference on Molecular Beam Epitaxy (MBE-XII) CY SEP 15-20, 2002 CL SAN FRANCISCO, CALIFORNIA DE metamorphic epitaxy; molecular beam epitaxy; semiconducting indium compounds; bipolar transistors; heterojunction semiconductor devices ID HETEROJUNCTION BIPOLAR-TRANSISTORS; BAND OFFSETS AB Two advances in InAs-based bipolar transistor technology are reported. Metamorphic InAs bipolar junction transistors (BJTs), grown on semi-insulating GaAs substrates, are reported for the first time, showing current gains comparable to similar structures grown homoepitaxially on InAs substrates. Measurements by atomic force microscopy report root-mean-square surface roughness as low as 0.661 nm, for a metamorphic BJT structure with a 5 pin thick InAs buffer. The quality of the epitaxial structure was investigated as a function of the buffer layer thickness, by measuring the reverse-leakage current density of metamorphic BJTs of 1, 2, and 5 pm InAs buffer layers, showing improved electrical characteristics with increasing buffer layer thickness. A second technological advance. is also. reported, concerning the development of a heterojunction bipolar transistor (HBT), with a strained, pseudomorphic InAs1-yPy ternary for the wide-gap emitter. The common emitter current gain of a control BJT device was measured at 110, and the HBT device, of identical doping structure achieved beta = 180. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Rochester, Inst Opt, Rochester, NY 14627 USA. Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA. USAF, Mat & Mfg Technol Directorate, Res Lab, MLPS, Wright Patterson AFB, OH USA. RP Averett, KL (reprint author), Univ Rochester, Inst Opt, Wilmot Bldg, Rochester, NY 14627 USA. NR 20 TC 14 Z9 14 U1 0 U2 5 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 APR PY 2003 VL 251 IS 1-4 BP 852 EP 857 DI 10.1016/S0022-0248(02)02366-7 PG 6 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 666LY UT WOS:000182179800158 ER PT J AU Robertson, MA Borman, S Stevenson, RL AF Robertson, MA Borman, S Stevenson, RL TI Estimation-theoretic approach to dynamic range enhancement using multiple exposures SO JOURNAL OF ELECTRONIC IMAGING LA English DT Article AB We present a new approach for improving the effective dynamic range of cameras by using multiple photographs of the same scene taken with different exposure. times. Using this method enables the photographer to accurately capture scenes that contain high dynamic range by using a device with low dynamic range, which allows the capture of scenes that have both very bright and very dark regions. We approach the problem from a probabilistic standpoint, distinguishing it from the other methods reported in the literature on photographic dynamic range improvement. A new method is proposed for determining the camera's response function, which is an iterative procedure that need be done only once for a particular camera. With the response function known, high dynamic range images can be easily constructed by a weighted average of the input images. The particular form of weighting is controlled by the probabilistic formulation of the problem, and results in higher weight being assigned to pixels taken at longer exposure times. The advantages of this new weighting scheme are explained by comparison with other methods in the literature. Experimental results are presented to demonstrate the utility of the algorithm. (C) 2003 SPIE and IST. C1 Univ Notre Dame, Dept Elect Engn, Notre Dame, IN 46556 USA. RP Robertson, MA (reprint author), USAF, Res Lab, Multisensor Exploitat Branch, Rome, NY USA. NR 18 TC 91 Z9 96 U1 1 U2 5 PU I S & T - SOC IMAGING SCIENCE TECHNOLOGY PI SPRINGFIELD PA 7003 KILWORTH LANE, SPRINGFIELD, VA 22151 USA SN 1017-9909 J9 J ELECTRON IMAGING JI J. Electron. Imaging PD APR PY 2003 VL 12 IS 2 BP 219 EP 228 DI 10.1117/1.1557695 PG 10 WC Engineering, Electrical & Electronic; Optics; Imaging Science & Photographic Technology SC Engineering; Optics; Imaging Science & Photographic Technology GA 670DL UT WOS:000182392100002 ER PT J AU O'Brien, KE Chandramohan, V Nelson, DA Fischer, JR Stevens, G Poremba, JA AF O'Brien, KE Chandramohan, V Nelson, DA Fischer, JR Stevens, G Poremba, JA TI Effect of a physician-directed educational campaign on performance of proper diabetic foot exams in an outpatient setting SO JOURNAL OF GENERAL INTERNAL MEDICINE LA English DT Article DE diabetes; foot ulceration; foot exam; prevention; physical education ID CARE; MELLITUS; AMPUTATION; PREVENTION; ULCERATION; DIAGNOSES; PATTERNS; MILITARY; PROGRAM; RISK AB BACKGROUND: The established guidelines for a diabetes foot examination include assessing circulatory, skin, and neurological status to detect problems early and reduce the likelihood of amputation. Physician adherence to the guidelines for proper examination is less than optimal. OBJECTIVE: Our objective was to increase compliance with the performance of a proper foot examination through a predominantly physician-directed interventional campaign. METHODS: The study consisted of 3 parts: a retrospective chart review to estimate background compliance, an educational intervention, and prospective chart review at 3 and 6 months. A properly documented foot examination was defined as assessing at least 2 of the 3 necessary components. The educational intervention consisted of 2 lectures directed at resident physicians and a quality assurance announcement at a general internal medicine staff meeting. Clinic support staff were instructed to remove the shoes and socks of all diabetic patients when they were placed in exam rooms, and signs reminding diabetics were placed in each exam room. RESULTS: There was a significant increase in the performance of proper foot examination over the course of the study (baseline 14.0%, 3 months 58.0%, 6 months 62.1%; P < .001). Documentation of any component of a proper foot examination also increased substantially (32.6%, 67.3%, 72.5%; P < .001). Additionally, performance of each component of a proper exam increased dramatically during the study: neurological (13.5%, 35.8%, 38.5%; P < .001), skin (23.0%, 64.2%, 69.2%; P < .001), and vascular (14.0%, 51.2%, 50.5%; P < .001). CONCLUSIONS: Patients with diabetes are unlikely to have foot examinations in their primary medical care. A simple, low-cost educational intervention significantly improved the adherence to foot examination guidelines for patients with diabetes. C1 Univ S Florida, Coll Med, Biostat Clin Lab, Tampa, FL 33612 USA. Wilford Hall USAF Med Ctr, Div Gen Internal Med, San Antonio, TX 78236 USA. Wilford Hall USAF Med Ctr, Div Endocrinol, San Antonio, TX 78236 USA. Wilford Hall USAF Med Ctr, Dept Clin Invest, San Antonio, TX 78236 USA. Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA. RP O'Brien, KE (reprint author), Univ S Florida, Coll Med, Biostat Clin Lab, 12901 Bruce B Downs Blvd,MDC 80, Tampa, FL 33612 USA. NR 38 TC 16 Z9 18 U1 0 U2 0 PU BLACKWELL PUBLISHING INC PI MALDEN PA 350 MAIN ST, MALDEN, MA 02148 USA SN 0884-8734 J9 J GEN INTERN MED JI J. Gen. Intern. Med. PD APR PY 2003 VL 18 IS 4 BP 258 EP 265 DI 10.1046/j.1525-1497.2003.10662.x PG 8 WC Health Care Sciences & Services; Medicine, General & Internal SC Health Care Sciences & Services; General & Internal Medicine GA 668YD UT WOS:000182323400004 PM 12709092 ER PT J AU Sambasivan, S Kim, I Barnett, S Zurbuchen, MA Ji, J Kang, BW Goyal, A Barnes, PN Oberly, CE AF Sambasivan, S Kim, I Barnett, S Zurbuchen, MA Ji, J Kang, BW Goyal, A Barnes, PN Oberly, CE TI New approach to depositing yttria-stabilized zirconia buffer layers for coated conductors SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID ELECTRON-BEAM EVAPORATION; CRITICAL-CURRENT DENSITY; BIAXIALLY TEXTURED NI; THIN-FILMS; GRAIN-BOUNDARIES; GROWTH; TAPES; YBA2CU3O7-DELTA; RABITS AB A new approach for the production of yttria-stabilized zirconia (YSZ) oxide buffer layers directly on metal rolling-assisted biaxially textured substrates (RABiTS) is described in this paper. This represents a significant advance over existing techniques and avoids the need for complicated steps to avoid substrate oxidation during direct deposition of oxides. Current densities of about I MA/cm(2) have been achieved for YBa2Cu3O7-delta layers on the YSZ buffer, with an intermediate CeO2 layer. The process consists of reactive sputtering of a YxZr1-xN film directly on the RABiTS, which adopts its biaxial texture. This nitride film is then converted to YSZ via a thermal oxidation step. The YSZ films retain the texture of the nitride film (and of the RABiTS) through local syntaxy. In many cases, YSZ films exhibit improved biaxial texture over that of the RABiTS substrate. Nitrides can be sputter deposited at much higher rates relative to oxides, making the approach industrially scalable and economical. C1 Appl Thin Films Inc, Evanston, IL 60201 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. USAF, PRPG, Prop Directorate, Wright Patterson AFB, OH 45433 USA. RP Sambasivan, S (reprint author), Appl Thin Films Inc, 1801 Maple Ave, Evanston, IL 60201 USA. RI Zurbuchen, Mark/H-1664-2012 OI Zurbuchen, Mark/0000-0002-8947-6309 NR 25 TC 4 Z9 4 U1 0 U2 2 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD APR PY 2003 VL 18 IS 4 BP 919 EP 928 DI 10.1557/JMR.2003.0126 PG 10 WC Materials Science, Multidisciplinary SC Materials Science GA 664LW UT WOS:000182063400026 ER PT J AU Marchio, JD AF Marchio, JD TI Waltzing into the Cold War: The struggle for Occupied Austria SO JOURNAL OF MILITARY HISTORY LA English DT Book Review C1 US Transportation Command, Scott AFB, IL USA. RP Marchio, JD (reprint author), US Transportation Command, Scott AFB, IL USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU SOC MILITARY HISTORY PI LEXINGTON PA C/O VIRGINIA MILITARY INST, GEORGE C MARSHALL LIBRARY, LEXINGTON, VA 24450-1600 USA SN 0899-3718 J9 J MILITARY HIST JI J. Mil. Hist. PD APR PY 2003 VL 67 IS 2 BP 621 EP 622 DI 10.1353/jmh.2003.0139 PG 2 WC History SC History GA 664XA UT WOS:000182088700078 ER PT J AU Pogrel, MA Miller, CE AF Pogrel, MA Miller, CE TI A case of maxillary necrosis SO JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY LA English DT Review ID VARICELLA-ZOSTER VIRUS; INVASIVE ASPERGILLOSIS; HERPES-ZOSTER; INFECTION C1 Univ Calif San Francisco, Dept Oral & Maxillofacial Surg, San Francisco, CA 94143 USA. USAF Acad, Colorado Springs, CO 80840 USA. RP Pogrel, MA (reprint author), Univ Calif San Francisco, Dept Oral & Maxillofacial Surg, 521 Parnassus Ave, San Francisco, CA 94143 USA. NR 25 TC 18 Z9 19 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 USA SN 0278-2391 J9 J ORAL MAXIL SURG JI J. Oral Maxillofac. Surg. PD APR PY 2003 VL 61 IS 4 BP 489 EP 493 DI 10.1053/joms.2003.50095 PG 5 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA 662BG UT WOS:000181925400015 PM 12684969 ER PT J AU Zhang, T Park, SY Farmer, BL Interrante, LV AF Zhang, T Park, SY Farmer, BL Interrante, LV TI Synthesis of comb-type polycarbosilanes via nucleophilic substitution reactions on the main-chain silicon atoms SO JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY LA English DT Article DE liquid-crystalline polymers (LCP); structure-property relations; thermal properties; polycarbosilanes; side-chain polymers ID LIQUID-CRYSTALLINE POLYSILOXANES; THERMAL-PROPERTIES; SIDE-GROUPS; POLYMERS; POLY(SILYLENEMETHYLENES); MESOGENS; SPACER AB A series of comb-type polycarbosilanes of the type [Si(CH3)(OR)CH2](n) (where R = (CH2)(m)R', R' = --O-p-biphenyl-X [X = H (m = 3, 6, 8, or 11) or CN (m = 11)], and R' = (CF2)(7)CF3 (m = 4)) were prepared from poly(chloromethylsilylene-methylene) by reactions with the respective hydroxy-terminated side chains in the presence of triethylamine. The product side-chain polymers were typically greater than 90% substituted and, for R' = --0-p-biphenyl-X derivatives, they exhibited phase transitions between 27 and 150 degreesC involving both crystalline and liquid-crystalline phases. The introduction of the polar p-CN substituent to the biphenyl mesogen resulted in a substantial increase in both the isotropization temperature and the liquid-crystalline phase range with respect to the corresponding unsubstituted biphenyl derivative. For R = (CH2)(11)-O-biphenyl side chains, an analogous side-chain liquid-crystalline (SCLC) polysiloxane derivative of the type [Si(CH3)(O(CH2)(11)-O-biphenyl)O](n) was prepared by means of a catalytic dehydrogenation reaction. In contrast to the polycarbosilane bearing the same side chain, this polymer did not exhibit any liquid-crystalline phases but melted directly from a crystalline phase to an isotropic liquid at 94 degreesC. Similar behavior was observed for the polycarbosilane with a fluorocarbon chain, for which a single transition from a crystalline phase to an isotropic liquid was observed at -0.7 degreesC. The molecular structures of these polymers were characterized by means of gel permeation chromatography and high-resolution NMR studies, and the crystalline and liquid-crystalline phases of the SCLC polymers were identified by differential scanning calorimetry, polarized optical microscopy, and X-ray diffraction. (C) 2003 Wiley Periodicals, Inc. C1 Rensselaer Polytech Inst, Dept Chem, Troy, NY 12180 USA. Rensselaer Polytech Inst, NY State Ctr Polymer Synth, Troy, NY 12180 USA. Kyungpook Natl Univ, Dept Polymer Sci, Buk Gu, Taegu 702701, South Korea. USAF, Res Lab, MLBP, Wright Patterson AFB, OH 45433 USA. RP Interrante, LV (reprint author), Rensselaer Polytech Inst, Dept Chem, Troy, NY 12180 USA. NR 30 TC 6 Z9 6 U1 0 U2 4 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0887-624X J9 J POLYM SCI POL CHEM JI J. Polym. Sci. Pol. Chem. PD APR 1 PY 2003 VL 41 IS 7 BP 984 EP 997 DI 10.1002/pola.10648 PG 14 WC Polymer Science SC Polymer Science GA 653AP UT WOS:000181413300012 ER PT J AU Hamada, M Pohl, A Spiegelman, C Wendelberger, J AF Hamada, M Pohl, A Spiegelman, C Wendelberger, J TI A Bayesian approach to calibration intervals and properly calibrated tolerance intervals SO JOURNAL OF QUALITY TECHNOLOGY LA English DT Article DE linear calibration; lognormal population; nonlinear calibration models; normal population; tolerance bounds AB In this article we consider a Bayesian approach to inference in which there is a calibration relationship between measured and true quantities of interest. One situation in which this approach is useful is for unknowns in which calibration intervals are obtained. The other situation is when inference about a population is desired in which tolerance intervals are produced. The Bayesian approach easily handles a general calibration relationship, say nonlinear, with nonnormal errors. The population may also be general, say lognormal, for quantities which are nonnegative. The Bayesian approach is illustrated with three examples and implemented with the freely available WinBUGS software. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. USAF, Inst Technol, Dept Math & Stat, Wright Patterson AFB, OH 45433 USA. Texas A&M Univ, Dept Stat, College Stn, TX 77843 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Hamada, M (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 12 TC 7 Z9 7 U1 0 U2 2 PU AMER SOC QUALITY CONTROL-ASQC PI MILWAUKEE PA 600 N PLANKINTON AVE, MILWAUKEE, WI 53203 USA SN 0022-4065 J9 J QUAL TECHNOL JI J. Qual. Technol. PD APR PY 2003 VL 35 IS 2 BP 194 EP 205 PG 12 WC Engineering, Industrial; Operations Research & Management Science; Statistics & Probability SC Engineering; Operations Research & Management Science; Mathematics GA 666KL UT WOS:000182176400006 ER PT J AU Draim, JE Cefola, PJ Proulx, RJ Larsen, D Granholm, G AF Draim, JE Cefola, PJ Proulx, RJ Larsen, D Granholm, G TI Elliptical sun-synchronous orbits with line of apsides lying in or near the equatorial plane SO JOURNAL OF THE ASTRONAUTICAL SCIENCES LA English DT Article AB This paper explores the characteristics of retrograde, Sun-synchronous elliptic orbits with line of apsides lying in or near the equatorial plane. Coverage plots for a five-satellite ring showing the number of satellites in view and elevation angle data versus latitude and local time are presented. Stability of the orbit is discussed. Also analyzed is the effect of the trapped radiation field environment (Van Allen belts) on these orbits, as well as the exposure to damage by natural and man-made debris. A major advantage seen for these orbits is that they can be used to provide augmented Earth coverage for a selected latitudinal zone and a selected time of day (for all longitudes). This feature should prove useful for non-geostationary satellite communications systems where increased capacity is needed during daytime peak-traffic hours in heavily populated latitude bands. C1 MIT, USAF, Cambridge, MA 02139 USA. Charles Stark Draper Lab Inc, Cambridge, MA 02139 USA. EM jdraim@aol.com; cefola@ll.mit.edu; rproulx@draper.com; dlarsen@draper.com; granholm@alum.mit.edu NR 35 TC 1 Z9 1 U1 0 U2 1 PU AMER ASTRONAUTICAL SOC PI SPRINGFIELD PA 6352 ROLLING MILL PLACE SUITE 102, SPRINGFIELD, VA 22152 USA SN 0021-9142 J9 J ASTRONAUT SCI JI J. Astronaut. Sci. PD APR-JUN PY 2003 VL 51 IS 2 BP 143 EP 178 PG 36 WC Engineering, Aerospace SC Engineering GA 807UF UT WOS:000220525700003 ER PT J AU Gorrell, SE Okiishi, TH Copenhaver, WW AF Gorrell, SE Okiishi, TH Copenhaver, WW TI Stator-rotor interactions in a transonic Compressor - Part 1: Effect of blade-row spacing on performance SO JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME LA English DT Article; Proceedings Paper CT International Gas Turbine and Aeroengine Congress and Exhibition CY JUN 03-06, 2002 CL AMSTERDAM, NETHERLANDS ID INTERROW FLOW-FIELD; AXIAL COMPRESSOR; WAKE AB Usually less axial spacing between the blade rows of an axial flow compressor is associated with improved efficiency. However mass flow rate, pressure ratio, and efficiency all decreased as the axial spacing between the stator and rotor was reduced in a transonic compressor rig. Reductions as great as 3.3% in pressure ratio, and 1.3 points of efficiency were observed as axial spacing between the blade rows was decreased from far apart to close together The number of blades in the stator blade-row also affected stage performance. Higher stator blade-row solidity led to larger changes in pressure ratio efficiency, and mass flow rate with axial spacing variation. Analysis of the experimental data suggests that the drop in performance is a result of increased loss production due to blade row interactions. Losses in addition to mixing loss are present when the blade-rows are spaced closer together. The extra losses are associated with the upstream stator wakes and are most significant in the midspan region of the flow. C1 USAF, Res Lab, PRTF, Wright Patterson AFB, OH 45433 USA. Iowa State Univ, Coll Engn, Ames, IA 50011 USA. RP Gorrell, SE (reprint author), USAF, Res Lab, PRTF, Wright Patterson AFB, OH 45433 USA. NR 26 TC 23 Z9 27 U1 0 U2 5 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0889-504X J9 J TURBOMACH JI J. Turbomach.-Trans. ASME PD APR PY 2003 VL 125 IS 2 BP 328 EP 335 DI 10.1115/1.1540119 PG 8 WC Engineering, Mechanical SC Engineering GA 677GQ UT WOS:000182798900016 ER PT J AU Gorrell, SE Okiishi, TH Copenhaver, WW AF Gorrell, SE Okiishi, TH Copenhaver, WW TI Stator-rotor interactions in a transonic compressor - Part 2: Description of a loss-producing mechanism SO JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME LA English DT Article; Proceedings Paper CT International Gas Turbine and Aeroengine Congress and Exhibition CY JUN 03-06, 2002 CL AMSTERDAM, NETHERLANDS AB A previously unidentified loss producing mechanism resulting from the interaction of a transonic rotor blade row with an upstream stator blade row is described. This additional loss occurs only when the two blade rows are spaced closer together axially. Time-accurate simulations of the flow and high-response static pressure measurements acquired on the stator blade surface reveal important aspects of the fluid dynamics of the production of this additional loss. At close spacing the rotor bow shock is chopped by the stator trailing edge. The chopped bow shock becomes a pressure wave on the tipper surface of the stator that is nearly normal to the flow and that propagates upstream. In the reference frame relative to this pressure wave, the flow is supersonic and thus a moving shock wave that produces an entropy rise and loss is experienced The effect of this outcome of blade-row interaction is to lower the efficiency, pressure ratio, and mass flow rate observed as blade-row axial spacing is reduced from far to close. The magnitude of loss production is affected by the strength of the bow shock and how much it turns as it interacts with the trailing edge of the stator At far spacing the rotor bow shock degenerates into a bow wave before it interacts with the stator trailing edge and no significant pressure wave forms on the stator upper surface. For this condition, no additional loss is produced. C1 USAF, Res Lab, PRTF, Wright Patterson AFB, OH 45433 USA. Iowa State Univ, Coll Engn, Ames, IA 50011 USA. RP Gorrell, SE (reprint author), USAF, Res Lab, PRTF, Wright Patterson AFB, OH 45433 USA. NR 16 TC 22 Z9 27 U1 2 U2 7 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0889-504X J9 J TURBOMACH JI J. Turbomach.-Trans. ASME PD APR PY 2003 VL 125 IS 2 BP 336 EP 345 DI 10.1115/1.1540120 PG 10 WC Engineering, Mechanical SC Engineering GA 677GQ UT WOS:000182798900017 ER PT J AU Kenyon, JA Griffin, JH Feiner, DM AF Kenyon, JA Griffin, JH Feiner, DM TI Maximum bladed disk forced response from distortion of a structural mode SO JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME LA English DT Article; Proceedings Paper CT International Gas Turbine and Aeroengine Congress and Exhibition CY JUN 03-06, 2002 CL AMSTERDAM, NETHERLANDS DE mistuning; blade vibration; maximum response; robust; forced response ID VIBRATION AB A method is presented for obtaining maximum bladed disk forced response from distortion of a structural mode. It is shown that maximum response from mode distortion in a bladed disk occurs when the harmonic components of a distorted mode superimpose in a certain manner causing localization of the mode and strong response in a particular blade. In addition, it is shown that the response of an intentionally mistuned system with maximum response does not change significantly when small random mistuning is added to the system. A method is described for calculating the structural mistuning necessary to obtain the distorted mode that gives maximum response. The theory is validated numerically. C1 USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA. Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA. RP Kenyon, JA (reprint author), USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA. NR 23 TC 41 Z9 49 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0889-504X J9 J TURBOMACH JI J. Turbomach.-Trans. ASME PD APR PY 2003 VL 125 IS 2 BP 352 EP 363 DI 10.1115/1.1540118 PG 12 WC Engineering, Mechanical SC Engineering GA 677GQ UT WOS:000182798900019 ER PT J AU Chen, S Soares, GM AF Chen, S Soares, GM TI Balloon-targeted access of right portal vein for transluminal intrahepatic portosystemic shunt creation in the setting of portal vein thrombosis SO JOURNAL OF VASCULAR AND INTERVENTIONAL RADIOLOGY LA English DT Letter C1 Wilford Hall USAF Med Ctr, Div Vasc & Intervent Radiol, Lackland AFB, TX 78236 USA. Rhode Isl Hosp, Brown Med Sch, Dept Diagnost Imaging, Providence, RI USA. RP Chen, S (reprint author), Wilford Hall USAF Med Ctr, Div Vasc & Intervent Radiol, 2200 Bergquist Dr, Lackland AFB, TX 78236 USA. NR 5 TC 2 Z9 2 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 1051-0443 J9 J VASC INTERV RADIOL JI J. Vasc. Interv. Radiol. PD APR PY 2003 VL 14 IS 4 BP 513 EP 514 DI 10.1097/01.RVI.0000064848.87207.06 PG 2 WC Radiology, Nuclear Medicine & Medical Imaging; Peripheral Vascular Disease SC Radiology, Nuclear Medicine & Medical Imaging; Cardiovascular System & Cardiology GA 666EV UT WOS:000182164800016 PM 12682212 ER PT J AU Wang, SQ Giessen, BC Markiewicz, RS AF Wang, SQ Giessen, BC Markiewicz, RS TI Phase equilibrium in Y-Ba-Cu-O system SO MATERIALS LETTERS LA English DT Article DE superconductors; YBa2Cu3O7-delta; oxides; phase diagram; phase equilibrium; pinning center ID Y2O3-BAO-CUO; COMPATIBILITIES; 950-DEGREES-C AB We have reinvestigated the phase diagram of the system Y-Ba-Cu-O at 950 degreesC in the pertinent regions of its isobaric-isothermal sections, both in air and in pure oxygen, i.e., at 0.2 and 1.0 atm oxygen pressure. Our investigation showed that there is an equilibrium quadrilateral (with O-2 as the fifth phase) which is composed of the phase 123, 211, 011 and 143 in these sections (at a specified oxygen pressure; according to the phase rule, we then have Ph = 5, F = 1, C = 4). At higher temperatures, a diagonal tie line exists between the phases 123 and 143 rather than between the phases 211 and 011. At temperatures lower than the five-phase equilibrium, the tie line connects the phases 211 and 011. The equilibrium change as a function of T has been studied in the present program, And the necessary modification of the Y-Ba-Cu-O phase diagram as a function of temperature and O-2 pressure is reported. The observed new high-temperature phase relationship allows the phase "143" to be considered instead of 011 as a possible pinning center in 123. This may have important consequences with respect to raising the J(c) of YBa2Cu3O7-delta superconductors. (C) 2002 Elsevier Science B.V: All rights reserved. C1 Northeastern Univ, Dept Chem, Boston, MA 02115 USA. Northeastern Univ, Barnett Inst, Boston, MA 02115 USA. Northeastern Univ, Dept Phys, Boston, MA 02115 USA. RP Wang, SQ (reprint author), USAF, Res Lab, 80 Scott Dr,Hanscom AFB, Boston, MA 01731 USA. NR 9 TC 0 Z9 0 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-577X J9 MATER LETT JI Mater. Lett. PD APR PY 2003 VL 57 IS 13-14 BP 2110 EP 2115 DI 10.1016/S0167-577X(02)01147-3 PG 6 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 661FP UT WOS:000181880800043 ER PT J AU Bridges, EJ Schmelz, JO Mazer, S AF Bridges, EJ Schmelz, JO Mazer, S TI Skin interface pressure on the NATO litter SO MILITARY MEDICINE LA English DT Article; Proceedings Paper CT Meeting of the National-Institute-of-Nursing-Research on Nightingala CY SEP, 2001 CL WASHINGTON, D.C. SP NINR ID TRANSCUTANEOUS OXYGEN-TENSION; POSITION; MATTRESS AB The NATO litter serves as a transport device and hospital bed during all types of operations. Little is known about the skin interface pressure on this litter. The purpose of this study was to determine whether various types of padding on the litter and body position affect the peak skin interface pressure and the total body area exposed to interface pressures above 30 mm Hg at different body areas. Thirty-two subjects participated. A repeated measures design was used. The surface effect was statistically significant for all peak pressure and surface area analyses (repeated-measures analysis of variance, p < 0.01). There was a significant decrease in peak pressure and surface area between the litter and litter plus aeromedical evacuation mattress. The addition of the blanket did not significantly reduce pressures and should not be considered a pressure-reducing measure. Conversely, an aeromedical evacuation mattress should be used for all high-risk patients if feasible. Preventive measures (turning, elevating the heels) are still required. C1 59th Clin Res Squadron, Lackland AFB, TX 78236 USA. RP Bridges, EJ (reprint author), 59th Clin Res Squadron, 1255 Wilford Hall Loop, Lackland AFB, TX 78236 USA. NR 32 TC 6 Z9 7 U1 0 U2 1 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA SN 0026-4075 J9 MIL MED JI Milit. Med. PD APR PY 2003 VL 168 IS 4 BP 280 EP 286 PG 7 WC Medicine, General & Internal SC General & Internal Medicine GA 743AE UT WOS:000186549600003 PM 12733671 ER PT J AU Brueske, KF Velden, CS AF Brueske, KF Velden, CS TI Satellite-based tropical cyclone intensity estimation using the NOAA-KLM series Advanced Microwave Sounding Unit (AMSU) SO MONTHLY WEATHER REVIEW LA English DT Article AB Satellite-borne passive microwave radiometers, such as the Advanced Microwave Sounding Unit (AMSU) on the NOAA polar-orbiting series, are well suited to monitor tropical cyclones (TCs) by virtue of their ability to assess changes in tropospheric warm core structure in the presence of clouds. The temporal variability in TC upper-tropospheric warm anomaly (UTWA) size, structure, and magnitude provides vital information on changes in kinematic structure and minimum sea level pressure (MSLP) through well-established thermodynamic and dynamic principles. This study outlines the aspects of several factors affecting the effective AMSU measurement accuracy of UTWAs, including the practical application of a previously developed maximum likelihood regression algorithm designed to explicitly correct for TC scan geometry and UTWA-antenna gain pattern interaction issues (UTWA subsampling) unique to TC warm core applications. This single-channel AMSU approach (54.96 GHz) is the first step toward a more elaborate multichannel application that is currently under study. Independent application of the single-channel algorithm in the Atlantic and eastern Pacific basins in 2000 and 2001 demonstrates that AMSU-derived UTWAs are moderately correlated with coincident TC MSLP. In addition, further improvements in correlation, and MSLP estimate accuracy, are possible through application of the proposed corrective retrieval algorithm, provided that 1) accurate estimates of TC eye size ( a proxy for the UTWA horizontal dimension) are available and 2) the peak upper-tropospheric warming represented by the AMSU-A 54.94-GHz radiances corresponds with the actual TC thermal structure. This study recommends potential remedies for both of these algorithm skill prerequisites that include the incorporation of improved eye size estimates from ancillary data sources and/or the utilization of additional AMSU-A upper-tropospheric sounding channels. C1 USAF Acad, HQ USAFA DFP, Dept Phys, Colorado Springs, CO 80840 USA. Univ Wisconsin, Cooperat Inst Meteorol Satellite Studies, Madison, WI USA. RP Brueske, KF (reprint author), USAF Acad, HQ USAFA DFP, Dept Phys, 2354 Fairchild Hall,Ste 2A211, Colorado Springs, CO 80840 USA. NR 15 TC 44 Z9 47 U1 1 U2 2 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0027-0644 J9 MON WEATHER REV JI Mon. Weather Rev. PD APR PY 2003 VL 131 IS 4 BP 687 EP 697 DI 10.1175/1520-0493(2003)131<0687:SBTCIE>2.0.CO;2 PG 11 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 658JM UT WOS:000181717900007 ER PT J AU Zakaluzny, SA Lane, JD Mair, EA AF Zakaluzny, SA Lane, JD Mair, EA TI Complications of tracheobronchial airway stents SO OTOLARYNGOLOGY-HEAD AND NECK SURGERY LA English DT Article; Proceedings Paper CT 104th Annual Meeting of the American-Academy-of-Otolaryngology-Head-and-Neck-Surgery CY SEP 24-29, 2000 CL WASHINGTON, D.C. SP Amer Acad Otolaryngol Head & Neck Surg ID EXPANDABLE METALLIC STENTS; BRONCHOMALACIA; MANAGEMENT AB OBJECTIVE: Our goal was to identify and analyze airway stent complications and to devise approaches to manage stent complications. STUDY DESIGN AND SETTING: We conducted a retrospective review of patients from a tertiary medical center. METHODS: Twenty-eight airway stents were placed in 23 patients for benign (n = 15) and malignant (n = 13) tracheobronchial diseases. All patients were followed clinically for signs of complications. RESULTS: Nine complications (8 in those with benign disease and 1 in a patient with malignant disease) were identified and included stent migration (n = 3), excessive granulation tissue (n = 2), stent fracture (n = 1), poor patient tolerance (n = 2), and inability to place (n = 1). Avoidance and management strategies for stent complications are introduced. CONCLUSION: Tracheobronchial stents provide minimally invasive therapy for significant airway obstruction. Stent complications are more frequently encountered in the long-term treatment of benign conditions. Stents can be successfully removed endoscopically if complications arise, but the longer a metallic stent is in place, the more difficult it is to remove. SIGNIFICANCE: As airway stent use increases, proper management will be required to avoid and manage complications. This is the first report to focus on stent complications and their management. C1 Walter Reed Army Med Ctr, Otolaryngol Serv, Washington, DC 20307 USA. Walter Reed Army Med Ctr, Intervent Radiol Serv, Washington, DC 20307 USA. RP Mair, EA (reprint author), Wilford Hall USAF Med Ctr, Dept Otolaryngol, 2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA. NR 12 TC 76 Z9 90 U1 0 U2 1 PU MOSBY, INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 USA SN 0194-5998 J9 OTOLARYNG HEAD NECK JI Otolaryngol. Head Neck Surg. PD APR PY 2003 VL 128 IS 4 BP 478 EP 488 DI 10.1016/mhn.2003.107 PG 11 WC Otorhinolaryngology; Surgery SC Otorhinolaryngology; Surgery GA 669HQ UT WOS:000182346200006 PM 12707649 ER PT J AU Nelson, SL Valtier, S Cody, JT AF Nelson, SL Valtier, S Cody, JT TI Amphetamine metabolism: Distinguishing illicit from prescription use SO PEDIATRIC RESEARCH LA English DT Meeting Abstract CT Annual Meeting of the Pediatric-Academic-Society CY MAY 03-06, 2003 CL SEATTLE, WASHINGTON SP Pediat Acad Soc, Amer Pediat Soc, Soc Pediat Res, Ambulatory Pediat Assoc, Tulane Univ Hlth Sci Ctr, Ctr Continuing Educ C1 Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. Wilford Hall USAF Med Ctr, Clin Res Squadron, San Antonio, TX 78236 USA. Ft Sam Houston, Acad Hlth Sci, San Antonio, TX USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU INT PEDIATRIC RESEARCH FOUNDATION, INC PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 USA SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 2003 VL 53 IS 4 SU S MA 39 BP 7A EP 7A PN 2 PG 1 WC Pediatrics SC Pediatrics GA 661PA UT WOS:000181897900040 ER PT J AU Winter, LW Yoder, BA AF Winter, LW Yoder, BA TI Effect of prenatal steroids on pulmonary function, blood pressure and cardiovascular support in premature baboons SO PEDIATRIC RESEARCH LA English DT Meeting Abstract CT Annual Meeting of the Pediatric-Academic-Society CY MAY 03-06, 2003 CL SEATTLE, WASHINGTON SP Pediat Acad Soc, Amer Pediat Soc, Soc Pediat Res, Ambulatory Pediat Assoc, Tulane Univ Hlth Sci Ctr, Ctr Continuing Educ C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. Univ Texas, Hlth Sci Ctr, San Antonio, TX USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT PEDIATRIC RESEARCH FOUNDATION, INC PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 USA SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 2003 VL 53 IS 4 SU S MA 154 BP 28A EP 28A PN 2 PG 1 WC Pediatrics SC Pediatrics GA 661PA UT WOS:000181897900155 ER PT J AU DiGeronimo, RJ Dixon, PS Kerecman, J Henderson, CL AF DiGeronimo, RJ Dixon, PS Kerecman, J Henderson, CL TI Effects of a hemoglobin-based oxygen-carrying (HBOC-201) solution on neutrophil activation and function during extracorporeal membrane oxygenation (ECMO) SO PEDIATRIC RESEARCH LA English DT Meeting Abstract CT Annual Meeting of the Pediatric-Academic-Society CY MAY 03-06, 2003 CL SEATTLE, WASHINGTON SP Pediat Acad Soc, Amer Pediat Soc, Soc Pediat Res, Ambulatory Pediat Assoc, Tulane Univ Hlth Sci Ctr, Ctr Continuing Educ C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT PEDIATRIC RESEARCH FOUNDATION, INC PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 USA SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 2003 VL 53 IS 4 SU S MA 250 BP 45A EP 45A PN 2 PG 1 WC Pediatrics SC Pediatrics GA 661PA UT WOS:000181897900251 ER PT J AU Henderson, CL Anderson, CM Sorrells, DL Dick, EJ DiGeronimo, RJ AF Henderson, CL Anderson, CM Sorrells, DL Dick, EJ DiGeronimo, RJ TI The use of hemoglobin-based oxygen carrying solution (HBOC-201) for extracorporeal membrane oxygenation (ECMO) in a pig model with ARDS SO PEDIATRIC RESEARCH LA English DT Meeting Abstract CT Annual Meeting of the Pediatric-Academic-Society CY MAY 03-06, 2003 CL SEATTLE, WASHINGTON SP Pediat Acad Soc, Amer Pediat Soc, Soc Pediat Res, Ambulatory Pediat Assoc, Tulane Univ Hlth Sci Ctr, Ctr Continuing Educ C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. Wilford Hall USAF Med Ctr, Clin Invest Div, Lackland AFB, TX 78236 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT PEDIATRIC RESEARCH FOUNDATION, INC PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 USA SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 2003 VL 53 IS 4 SU S MA 251 BP 45A EP 45A PN 2 PG 1 WC Pediatrics SC Pediatrics GA 661PA UT WOS:000181897900252 ER PT J AU Winter, LW Yoder, BA Martin, HC AF Winter, LW Yoder, BA Martin, HC TI The effect of advancing gestational age on urinary cortisol excretion in immature baboons SO PEDIATRIC RESEARCH LA English DT Meeting Abstract CT Annual Meeting of the Pediatric-Academic-Society CY MAY 03-06, 2003 CL SEATTLE, WASHINGTON SP Pediat Acad Soc, Amer Pediat Soc, Soc Pediat Res, Ambulatory Pediat Assoc, Tulane Univ Hlth Sci Ctr, Ctr Continuing Educ C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. Univ Texas, Hlth Sci Ctr, San Antonio, TX USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT PEDIATRIC RESEARCH FOUNDATION, INC PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 USA SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 2003 VL 53 IS 4 SU S MA 831 BP 146A EP 146A PN 2 PG 1 WC Pediatrics SC Pediatrics GA 661PA UT WOS:000181897900832 ER PT J AU Randall, VF Flake, EM Hanson, JL AF Randall, VF Flake, EM Hanson, JL TI Parent decision-making about complementary and alternative medicine SO PEDIATRIC RESEARCH LA English DT Meeting Abstract CT Annual Meeting of the Pediatric-Academic-Society CY MAY 03-06, 2003 CL SEATTLE, WASHINGTON SP Pediat Acad Soc, Amer Pediat Soc, Soc Pediat Res, Ambulatory Pediat Assoc, Tulane Univ Hlth Sci Ctr, Ctr Continuing Educ C1 Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA. USAF, Med Ctr, Med Grp 81, Keesler AFB, MS 39534 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU INT PEDIATRIC RESEARCH FOUNDATION, INC PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 USA SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 2003 VL 53 IS 4 SU S MA 1071 BP 188A EP 189A PN 2 PG 2 WC Pediatrics SC Pediatrics GA 661PA UT WOS:000181897901072 ER PT J AU Gerber, RJ Kremmer, TM Lynch, J AF Gerber, RJ Kremmer, TM Lynch, J TI Prevalence of iron deficiency in a rural Honduran population SO PEDIATRIC RESEARCH LA English DT Meeting Abstract CT Annual Meeting of the Pediatric-Academic-Society CY MAY 03-06, 2003 CL SEATTLE, WASHINGTON SP Pediat Acad Soc, Amer Pediat Soc, Soc Pediat Res, Ambulatory Pediat Assoc, Tulane Univ Hlth Sci Ctr, Ctr Continuing Educ C1 Wilford Hall USAF Med Ctr, San Antonio Mil Pediat Ctr, Lackland AFB, TX 78236 USA. Uniformed Serv Univ Hlth Sci, Ctr Disaster & Humanitarian Assistance Med, Dept Mil & Emergency Med, Bethesda, MD 20814 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT PEDIATRIC RESEARCH FOUNDATION, INC PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 USA SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 2003 VL 53 IS 4 SU S MA 1074 BP 189A EP 189A PN 2 PG 1 WC Pediatrics SC Pediatrics GA 661PA UT WOS:000181897901075 ER PT J AU Sutter, D Henley, D Trevino, S Lynch, J AF Sutter, D Henley, D Trevino, S Lynch, J TI Prevalence and risk factors for Staphylococcus aureus carriage in a community cohort SO PEDIATRIC RESEARCH LA English DT Meeting Abstract CT Annual Meeting of the Pediatric-Academic-Society CY MAY 03-06, 2003 CL SEATTLE, WASHINGTON SP Pediat Acad Soc, Amer Pediat Soc, Soc Pediat Res, Ambulatory Pediat Assoc, Tulane Univ Hlth Sci Ctr, Ctr Continuing Educ C1 San Antonio Mil Pediat Ctr, San Antonio, TX USA. Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT PEDIATRIC RESEARCH FOUNDATION, INC PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 USA SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 2003 VL 53 IS 4 SU S MA 1842 BP 323A EP 323A PN 2 PG 1 WC Pediatrics SC Pediatrics GA 661PA UT WOS:000181897901841 ER PT J AU Dotzler, SA DiGeronimo, RJ Yoder, BA Coalson, J Siler-Khodr, TM AF Dotzler, SA DiGeronimo, RJ Yoder, BA Coalson, J Siler-Khodr, TM TI The distribution of corticotrophin releasing hormone in the fetal, newborn, juvenile and adult baboons SO PEDIATRIC RESEARCH LA English DT Meeting Abstract CT Annual Meeting of the Pediatric-Academic-Society CY MAY 03-06, 2003 CL SEATTLE, WASHINGTON SP Pediat Acad Soc, Amer Pediat Soc, Soc Pediat Res, Ambulatory Pediat Assoc, Tulane Univ Hlth Sci Ctr, Ctr Continuing Educ C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. Univ Texas, Hlth Sci Ctr, San Antonio, TX USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT PEDIATRIC RESEARCH FOUNDATION, INC PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 USA SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 2003 VL 53 IS 4 SU S MA 2101 BP 369A EP 370A PN 2 PG 2 WC Pediatrics SC Pediatrics GA 661PA UT WOS:000181897902099 ER PT J AU Yoder, B McCurnin, D AF Yoder, B McCurnin, D TI Immature female baboons recover from RDS earlier than males SO PEDIATRIC RESEARCH LA English DT Meeting Abstract CT Annual Meeting of the Pediatric-Academic-Society CY MAY 03-06, 2003 CL SEATTLE, WASHINGTON SP Pediat Acad Soc, Amer Pediat Soc, Soc Pediat Res, Ambulatory Pediat Assoc, Tulane Univ Hlth Sci Ctr, Ctr Continuing Educ C1 Univ Texas, Hlth Sci Ctr, San Antonio, TX USA. Pediatrix Med Grp, San Antonio, TX USA. Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT PEDIATRIC RESEARCH FOUNDATION, INC PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 USA SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 2003 VL 53 IS 4 SU S MA 2334 BP 412A EP 413A PN 2 PG 2 WC Pediatrics SC Pediatrics GA 661PA UT WOS:000181897902332 ER PT J AU Stevens, TK Kerecman, J McCurnin, D Yoder, BA Shaul, P Grubb, P AF Stevens, TK Kerecman, J McCurnin, D Yoder, BA Shaul, P Grubb, P TI Minute ventilation of nitric oxide increases over the first 21 days following the acute phase of RDS in the premature baboon model of bronchopulmonary dysplasia SO PEDIATRIC RESEARCH LA English DT Meeting Abstract CT Annual Meeting of the Pediatric-Academic-Society CY MAY 03-06, 2003 CL SEATTLE, WASHINGTON SP Pediat Acad Soc, Amer Pediat Soc, Soc Pediat Res, Ambulatory Pediat Assoc, Tulane Univ Hlth Sci Ctr, Ctr Continuing Educ C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. SW Fdn Biomed Res, Neonatal Intens Care Unit, San Antonio, TX 78284 USA. Univ Texas, SW Med Ctr, Dallas, TX 75230 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT PEDIATRIC RESEARCH FOUNDATION, INC PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 USA SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 2003 VL 53 IS 4 SU S MA 2337 BP 413A EP 413A PN 2 PG 1 WC Pediatrics SC Pediatrics GA 661PA UT WOS:000181897902335 ER PT J AU Winter, LW Yoder, BA Martin, HC AF Winter, LW Yoder, BA Martin, HC TI The effect of in-utero infection with Ureaplasma urealyticum on post-natal urinary cortisol excretion in immature baboons SO PEDIATRIC RESEARCH LA English DT Meeting Abstract CT Annual Meeting of the Pediatric-Academic-Society CY MAY 03-06, 2003 CL SEATTLE, WASHINGTON SP Pediat Acad Soc, Amer Pediat Soc, Soc Pediat Res, Ambulatory Pediat Assoc, Tulane Univ Hlth Sci Ctr, Ctr Continuing Educ C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. Univ Texas, Hlth Sci Ctr, San Antonio, TX USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT PEDIATRIC RESEARCH FOUNDATION, INC PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 USA SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 2003 VL 53 IS 4 SU S MA 2909 BP 514A EP 515A PN 2 PG 2 WC Pediatrics SC Pediatrics GA 661PA UT WOS:000181897902906 ER PT J AU McCurnin, DC Yoder, BA DiGeronimo, RJ AF McCurnin, DC Yoder, BA DiGeronimo, RJ TI aEEG changes in a premature baboon model of respiratory distress-relevance to the premature infant SO PEDIATRIC RESEARCH LA English DT Meeting Abstract CT Annual Meeting of the Pediatric-Academic-Society CY MAY 03-06, 2003 CL SEATTLE, WASHINGTON SP Pediat Acad Soc, Amer Pediat Soc, Soc Pediat Res, Ambulatory Pediat Assoc, Tulane Univ Hlth Sci Ctr, Ctr Continuing Educ C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. Univ Texas, Hlth Sci Ctr, San Antonio, TX USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT PEDIATRIC RESEARCH FOUNDATION, INC PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 USA SN 0031-3998 J9 PEDIATR RES JI Pediatr. Res. PD APR PY 2003 VL 53 IS 4 SU S MA 3068 BP 542A EP 542A PN 2 PG 1 WC Pediatrics SC Pediatrics GA 661PA UT WOS:000181897903065 ER PT J AU Bletzinger, P Ganguly, BN Garscadden, A AF Bletzinger, P Ganguly, BN Garscadden, A TI Strong double-layer formation by shock waves in nonequilibrium plasmas SO PHYSICAL REVIEW E LA English DT Article ID POSITIVE-COLUMN; DISCHARGES AB Strong double-layer formation by acoustic shock wave ( 0) transitions. (C) 2003 Elsevier Science B.V. All rights reserved. C1 USAF, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA. Univ New Mexico, Dept Mech Engn, Albuquerque, NM 87131 USA. RP Hewett, KB (reprint author), USAF, Res Lab, Directed Energy Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA. NR 25 TC 1 Z9 1 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD MAR 21 PY 2003 VL 370 IS 5-6 BP 591 EP 596 DI 10.1016/S0009-2614(03)00109-X PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 655UV UT WOS:000181571800001 ER PT J AU Nitta, NV Cliver, EW Tylka, AJ AF Nitta, NV Cliver, EW Tylka, AJ TI Low coronal signatures of large solar energetic particle events SO ASTROPHYSICAL JOURNAL LA English DT Article DE Sun : coronal mass ejections (CMEs); Sun : flares; Sun : particle emission ID MASS EJECTIONS; PROTON EVENTS; ACCELERATION; FLARES AB We report on the low coronal signatures of major solar energetic particle (SEP) events. Because large SEP events are highly associated with both flares and coronal mass ejections, we focused on flare-associated motions in soft X-rays. In a sample of a half-dozen well-observed flares associated with SEP events, we identified two basic types of motions or ejections. For one class of events including those of 2001 November 4 and 1998 April 20, the ejections occur on active region or larger scales. They have an extended "preeruption" phase in which the involved structures slowly rise or expand on timescales of tens of minutes. For the second class of events, including those on 1997 November 6 and 2001 April 15, the large-scale preeruption phase is absent. In these events, ejecta appear explosively at the onset of the flare impulsive phase. The observed differences in ejections appear to correlate with spectral/compositional/charge state characteristics of large SEP events, suggesting that flare ejecta are diagnostic of shock properties/environment. C1 Lockheed Martin Solar & Astrophys Lab, Palo Alto, CA 94304 USA. USAF, Res Lab, Space Vehicles Directorate, VSBXS, Hanscom AFB, MA 01731 USA. USN, EO Hulburt Ctr Space Res, Res Lab, Washington, DC 20375 USA. RP Nitta, NV (reprint author), Lockheed Martin Solar & Astrophys Lab, OL9-41,B-252,3251 Hanover St, Palo Alto, CA 94304 USA. RI Tylka, Allan/G-9592-2014 NR 24 TC 15 Z9 15 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 20 PY 2003 VL 586 IS 1 BP L103 EP L106 DI 10.1086/374613 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 653RX UT WOS:000181451800024 ER PT J AU Udaykumar, HS Tran, L Belk, DM Vanden, KJ AF Udaykumar, HS Tran, L Belk, DM Vanden, KJ TI An Eulerian method for computation of multimaterial impact with ENO shock-capturing and sharp interfaces SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE moving boundaries; impact; multimaterial flows; high-strain rate ID FINITE-ELEMENT METHOD; SMOOTHED PARTICLE HYDRODYNAMICS; ORDER GODUNOV METHOD; GHOST FLUID METHOD; EFFICIENT IMPLEMENTATION; INCOMPRESSIBLE FLOWS; RIEMANN SOLVER; SCHEMES; BOUNDARIES; SPH AB A technique is presented for the numerical simulation of high-speed multimaterial impact. Of particular interest is the interaction of solid impactors with targets. The computations are performed on a fixed Cartesian mesh by casting the equations governing material deformation in Eulerian conservation law form. The advantage of the Eulerian setting is the disconnection of the mesh from the boundary deformation allowing for large distortions of the interfaces. Eigenvalue analysis reveals that the system of equations is hyperbolic for the range of materials and impact velocities of interest. High-order accurate ENO shock-capturing schemes are used along with interface tracking techniques to evolve sharp immersed boundaries. The numerical technique is designed to tackle the following physical phenomena encountered during impact: (1) high velocities of impact leading to large deformations of the impactor as well as targets; (2) nonlinear wave-propagation and the development of shocks in the materials; (3) modeling of the constitutive properties of materials under intense impact conditions and accurate numerical calculation of the elasto-plastic behavior described by the models; (4) phenomena at multiple interfaces (such as impactor-target, target ambient and impactor-ambient), i.e. both free surface and surface-surface dynamics. Comparison with Lagrangian calculations is made for the elasto-plastic deformation of solid material. The accuracy of convex ENO scheme for shock capturing, with the Mic-Gruneisen equation of state for pressure, is closely examined. Good agreement of the present finite difference fixed grid results is obtained with exact solutions in I D and benchmarked moving finite element solutions for axisymmetric Taylor impact. (C) 2003 Elsevier Science (USA). All rights reserved. C1 Univ Iowa, Dept Mech & Ind Engn, Iowa City, IA 52242 USA. USAF, Res Lab, AFRL, MNAC, Eglin AFB, FL 32542 USA. RP Udaykumar, HS (reprint author), Univ Iowa, Dept Mech & Ind Engn, Iowa City, IA 52242 USA. NR 65 TC 47 Z9 51 U1 2 U2 17 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD MAR 20 PY 2003 VL 186 IS 1 BP 136 EP 177 DI 10.1016/S0021-9991(03)00027-5 PG 42 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 663VA UT WOS:000182025900007 ER PT J AU Palm-Leis, A Fitzsimmons, PJ Kruyer, WB AF Palm-Leis, A Fitzsimmons, PJ Kruyer, WB TI Natural history of new left bundle branch block in 134 apparently healthy males: Mean follow-up of 16 years SO JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY LA English DT Meeting Abstract CT 52nd Annual Scientific Session of the American-College-of-Cardiology CY MAR 30-APR 02, 2003 CL CHICAGO, ILLINOIS SP American Coll Cardiol C1 USAF, Sch Aerosp Med, Brooks AFB, TX 78235 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0735-1097 J9 J AM COLL CARDIOL JI J. Am. Coll. Cardiol. PD MAR 19 PY 2003 VL 41 IS 6 SU A BP 104A EP 104A PG 1 WC Cardiac & Cardiovascular Systems SC Cardiovascular System & Cardiology GA 657LW UT WOS:000181669500452 ER PT J AU Shry, EA Eckart, R Furgerson, J Stajduhar, K AF Shry, EA Eckart, R Furgerson, J Stajduhar, K TI The addition of posterior or right-sided chest leads does not enhance the sensitivity of stress testing SO JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY LA English DT Meeting Abstract CT 52nd Annual Scientific Session of the American-College-of-Cardiology CY MAR 30-APR 02, 2003 CL CHICAGO, ILLINOIS SP American Coll Cardiol C1 Brooke Army Med Ctr, San Antonio, TX USA. Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0735-1097 J9 J AM COLL CARDIOL JI J. Am. Coll. Cardiol. PD MAR 19 PY 2003 VL 41 IS 6 SU A BP 178A EP 178A PG 1 WC Cardiac & Cardiovascular Systems SC Cardiovascular System & Cardiology GA 657LW UT WOS:000181669500771 ER PT J AU Krasuski, RA Wang, A Harrison, JK Johnson, M Pierce, C Bashore, TM AF Krasuski, RA Wang, A Harrison, JK Johnson, M Pierce, C Bashore, TM TI Differing clinical characteristics among black and white patients referred for treatment of pulmonary hypertension SO JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY LA English DT Meeting Abstract CT 52nd Annual Scientific Session of the American-College-of-Cardiology CY MAR 30-APR 02, 2003 CL CHICAGO, ILLINOIS SP American Coll Cardiol C1 Duke Univ, Durham, NC USA. Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0735-1097 J9 J AM COLL CARDIOL JI J. Am. Coll. Cardiol. PD MAR 19 PY 2003 VL 41 IS 6 SU A BP 224A EP 224A PG 1 WC Cardiac & Cardiovascular Systems SC Cardiovascular System & Cardiology GA 657LW UT WOS:000181669500964 ER PT J AU Krasuski, RA Doeppenschmidt, DL Beck, RL Henry, JS Thompson, CM AF Krasuski, RA Doeppenschmidt, DL Beck, RL Henry, JS Thompson, CM TI Converting patients intolerant of simvastatin to atorvastatin is a safe practice and associated with significant improvement in lipid control and less creatine kinase elevation SO JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY LA English DT Meeting Abstract CT 52nd Annual Scientific Session of the American-College-of-Cardiology CY MAR 30-APR 02, 2003 CL CHICAGO, ILLINOIS SP American Coll Cardiol C1 Wilford Hall USAF Med Ctr, San Antonio, TX USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0735-1097 J9 J AM COLL CARDIOL JI J. Am. Coll. Cardiol. PD MAR 19 PY 2003 VL 41 IS 6 SU A BP 245A EP 245A PG 1 WC Cardiac & Cardiovascular Systems SC Cardiovascular System & Cardiology GA 657LW UT WOS:000181669501065 ER PT J AU Krasuski, RA Maranian, AM Whitney, EJ Personius, BE Brown, BG Gotto, AM AF Krasuski, RA Maranian, AM Whitney, EJ Personius, BE Brown, BG Gotto, AM TI Aggressive treatment aimed at raising high-density lipoprotein cholesterol in stable patients with angiographically evident coronary disease prevents stenosis progression and reduces cardiovascular events SO JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY LA English DT Meeting Abstract CT 52nd Annual Scientific Session of the American-College-of-Cardiology CY MAR 30-APR 02, 2003 CL CHICAGO, ILLINOIS SP American Coll Cardiol C1 Wilford Hall USAF Med Ctr, San Antonio, TX 78236 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0735-1097 J9 J AM COLL CARDIOL JI J. Am. Coll. Cardiol. PD MAR 19 PY 2003 VL 41 IS 6 SU A BP 315A EP 315A PG 1 WC Cardiac & Cardiovascular Systems SC Cardiovascular System & Cardiology GA 657LW UT WOS:000181669501384 ER PT J AU Selvaraj, CL Vandegraaff, E Abels, B Marshall, J Steinhubl, SR AF Selvaraj, CL Vandegraaff, E Abels, B Marshall, J Steinhubl, SR TI Platelet activation as a predictor of acute coronary syndrome in patients who present to the emergency department with chest pain SO JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY LA English DT Meeting Abstract CT 52nd Annual Scientific Session of the American-College-of-Cardiology CY MAR 30-APR 02, 2003 CL CHICAGO, ILLINOIS SP American Coll Cardiol C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0735-1097 J9 J AM COLL CARDIOL JI J. Am. Coll. Cardiol. PD MAR 19 PY 2003 VL 41 IS 6 SU A BP 364A EP 364A PG 1 WC Cardiac & Cardiovascular Systems SC Cardiovascular System & Cardiology GA 657LW UT WOS:000181669501586 ER PT J AU Krasuski, RA Cao, MK Leding, CJ Bush, AC Bashore, TM Osswald, SS Kruyer, WB Gaffney, FA AF Krasuski, RA Cao, MK Leding, CJ Bush, AC Bashore, TM Osswald, SS Kruyer, WB Gaffney, FA TI Holter monitoring and treadmill testing assist in prediction of future events in patients with classic mitral valve prolapse SO JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY LA English DT Meeting Abstract CT 52nd Annual Scientific Session of the American-College-of-Cardiology CY MAR 30-APR 02, 2003 CL CHICAGO, ILLINOIS SP American Coll Cardiol C1 Wilford Hall USAF Med Ctr, Brooks AFB, San Antonio, TX 78236 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0735-1097 J9 J AM COLL CARDIOL JI J. Am. Coll. Cardiol. PD MAR 19 PY 2003 VL 41 IS 6 SU A BP 515A EP 515A PG 1 WC Cardiac & Cardiovascular Systems SC Cardiovascular System & Cardiology GA 657LW UT WOS:000181669502231 ER PT J AU Plis, E Rotella, P Raghavan, S Dawson, LR Krishna, S Le, D Morath, CP AF Plis, E Rotella, P Raghavan, S Dawson, LR Krishna, S Le, D Morath, CP TI Growth of room-temperature "arsenic free" infrared photovoltaic detectors on GaSb substrate using metamorphic InAlSb digital alloy buffer layers SO APPLIED PHYSICS LETTERS LA English DT Article ID ELECTRON-MOBILITY TRANSISTOR; INAS/GA1-XINXSB SUPERLATTICE; HIGH-POWER; MU-M; LASERS; DIODE; SEMICONDUCTORS; PHOTODIODES; DEVICES AB We report the growth of a high-quality graded InAlSb digital alloy buffer layer on GaSb substrates. The metamorphic buffer layer relaxes the lattice matching constraint and allows the growth of heterostructures without the use of a second group V element. Cross-sectional transmission electronic microscopy images reveal a very low dislocation density in the buffer layer. Using such a buffer layer, a room-temperature InGaSb photovoltaic detector with lambda(cutoff)similar to3 mum has been fabricated with an external quantum efficiency >70%. (C) 2003 American Institute of Physics. C1 Univ New Mexico, Ctr High Technol Mat, Dept Elect & Comp Engn, Albuquerque, NM 87106 USA. USAF, Res Lab, VSSS, Kirtland AFB, NM 87117 USA. RP Krishna, S (reprint author), Univ New Mexico, Ctr High Technol Mat, Dept Elect & Comp Engn, Albuquerque, NM 87106 USA. RI Krishna, Sanjay /C-5766-2009; Morath, Christian/B-9147-2008 OI Morath, Christian/0000-0001-5838-9301 NR 29 TC 8 Z9 8 U1 1 U2 5 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 17 PY 2003 VL 82 IS 11 BP 1658 EP 1660 DI 10.1063/1.1556167 PG 3 WC Physics, Applied SC Physics GA 653NF UT WOS:000181442300004 ER PT J AU Lu, H Schaff, WJ Eastman, LF Stutz, CE AF Lu, H Schaff, WJ Eastman, LF Stutz, CE TI Surface charge accumulation of InN films grown by molecular-beam epitaxy SO APPLIED PHYSICS LETTERS LA English DT Article ID LAYER AB A series of thin InN films down to 10 nm in thickness were prepared by molecular-beam epitaxy on either AlN or GaN buffers under optimized growth conditions. By extrapolating the fitted curve of sheet carrier density versus film thickness to zero film thickness, a strong excess sheet charge was derived, which must come from either the surface or the interface between InN and its buffer layer. Since metal contacts, including Ti, Al, Ni, and a Hg probe, can always form an ohmic contact on InN without any annealing, it is determined that at least part of the excess charge is surface charge, which was also confirmed by capacitance-voltage measurements. (C) 2003 American Institute of Physics. C1 Cornell Univ, Dept Elect & Comp Engn, Ithaca, NY 14853 USA. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. RP Lu, H (reprint author), Cornell Univ, Dept Elect & Comp Engn, Ithaca, NY 14853 USA. NR 13 TC 252 Z9 254 U1 4 U2 23 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 17 PY 2003 VL 82 IS 11 BP 1736 EP 1738 DI 10.1063/1.1562340 PG 3 WC Physics, Applied SC Physics GA 653NF UT WOS:000181442300030 ER PT J AU Webb, JT AF Webb, JT TI Altitude decompression sickness - Cause, pathogenesis, protection SO FASEB JOURNAL LA English DT Meeting Abstract CT Experimental Biology 2003 Meeting CY APR 11-15, 2003 CL SAN DIEGO, CALIFORNIA C1 USAF, Res Lab, Wyle Labs Inc, Brooks AFB, TX 78235 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 17 PY 2003 VL 17 IS 5 SU S BP A948 EP A949 PN 2 PG 2 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA 659UY UT WOS:000181796900916 ER PT J AU Olivier, KN Weber, DJ Wallace, RJ Faiz, AR Lee, JH Zhang, YS Brown-Elliot, BA Handler, A Wilson, RW Schechter, MS Edwards, LJ Chakraborti, S Knowles, MR AF Olivier, KN Weber, DJ Wallace, RJ Faiz, AR Lee, JH Zhang, YS Brown-Elliot, BA Handler, A Wilson, RW Schechter, MS Edwards, LJ Chakraborti, S Knowles, MR CA Nontuberculous Mycobacteria Cystic TI Nontuberculous mycobacteria I: Multicenter prevalence study in cystic fibrosis SO AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE LA English DT Article DE cystic fibrosis; nontuberculous mycobacteria; mycobacterium infections; Mycobocterium avium-intracellulare; Mycobacterium abscessus ID COMPLEX PULMONARY-DISEASE; AVIUM COMPLEX; UNITED-STATES; LUNG-DISEASE; INTRACELLULARE COMPLEX; RAPID IDENTIFICATION; NOSOCOMIAL OUTBREAKS; INFECTION; DIAGNOSIS; PATTERNS AB Nontuberculous mycobacteria (NTM) are potential respiratory pathogens in cystic fibrosis (CF). To assess the species-specific prevalence and risk factors for acquisition, we conducted a prospective, cross-sectional study of the prevalence of NTM and clinical features of patients at 21 U.S. centers. Almost 10% of patients with CF who were 10 years or older were included (n = 986). The overall prevalence of NTM in sputum was 13.0% (range by center, 7-24%). Mycobacterium avium complex (72%) and Mycobacterium abscessus (16%) were the most common species. When compared with patients with CF without NTM, culture-positive subjects were older (26 vs. 22 years, p < 0.001), had a higher FEV1 (60 vs. 54%, p < 0.01), higher frequency of Staphylococcus aureus (43 vs. 31%, p < 0.01), and lower frequency of Pseudomonas aeruginosa (71 vs. 82%, p < 0.01). Molecular typing revealed that almost all patients within each center had unique NTM strains. In summary, NTM are common in patients with CF, but neither person-to-person nor nosocomial acquisition explained the high prevalence. Older age was the most significant predictor for isolation of NTM. The clinical significance of NTM in CF is incompletely defined, but patients with these organisms should be monitored with repeat cultures. C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. Univ N Carolina, Cyst Fibrosis Pulm Res & Treatment Ctr, Dept Epidemiol, Chapel Hill, NC USA. Univ N Carolina, Cyst Fibrosis Pulm Res & Treatment Ctr, Dept Biostat, Chapel Hill, NC USA. Univ N Carolina, Verne S Caviness Gen Clin Res Ctr, Dept Biostat, Chapel Hill, NC USA. Wake Forest Univ, Sch Med, Div Allergy Immunol & Resp Med, Winston Salem, NC USA. Univ Texas, Ctr Hlth, Dept Microbiol, Tyler, TX USA. RP Olivier, KN (reprint author), Wilford Hall USAF Med Ctr, 2200 Bergquist Dr,Ste 1,759 MSGS MCCP Pulm Crit C, Lackland AFB, TX 78236 USA. NR 58 TC 309 Z9 315 U1 1 U2 15 PU AMER THORACIC SOC PI NEW YORK PA 1740 BROADWAY, NEW YORK, NY 10019-4374 USA SN 1073-449X J9 AM J RESP CRIT CARE JI Am. J. Respir. Crit. Care Med. PD MAR 15 PY 2003 VL 167 IS 6 BP 828 EP 834 DI 10.1164/rccm.200207-678OC PG 7 WC Critical Care Medicine; Respiratory System SC General & Internal Medicine; Respiratory System GA 653MA UT WOS:000181439100006 PM 12433668 ER PT J AU Olivier, KN Weber, DJ Lee, JH Handler, A Tudor, G Molina, PL Tomashefski, J Knowles, MR AF Olivier, KN Weber, DJ Lee, JH Handler, A Tudor, G Molina, PL Tomashefski, J Knowles, MR CA Nontuberculous Mycobacteria Cystic TI Nontuberculous mycobacteria II: Nested-cohort study of impact on cystic fibrosis lung disease SO AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE LA English DT Article DE cystic fibrosis; nontuberculous mycobacteria; Mycobocterium ovium-intracellulare; Mycobacterium obscessus; computed tomography of chest ID AVIUM-INTRACELLULARE COMPLEX; YOUNG-ADULTS; INFECTION; COLONIZATION; ABSCESSUS AB The prevalence of nontuberculous mycobacteria (NTM) is high (approximately 13%) in sputum of patients with cystic fibrosis (CF), but the impact on lung disease is unknown. We followed 60 incident NTM-positive and 99 culture-negative patients with CF for 15 months and assessed clinical impact of NTM by FEV1 and high-resolution computed tomography (HRCT) of the chest. Mycobacterium avium complex was seen in 75% of NTM-positive subjects. The annual rate of decline in FEV1 was not different among control versus NTM-positive subjects who did not, or did, meet American Thoracic Society microbiologic criteria for NTM disease (3 +/- 1, 3 +/- 2, and 5 +/- 2%, respectively). More subjects with three or more positive cultures for NTM had two or more characteristic findings on entry HRCT (60%, 9/15) as compared with subjects with two positive cultures or less (32%) or negative cultures (19%; p < 0.02). All subjects with three or more positive cultures and exit HRCTs (n = 6) showed progression of HRCT findings, whereas only 17% of subjects with two positive cultures or less had progression (p = 0.0006). In summary, no significant short-term effect on FEV1 was detected in patients with multiple positive NTM cultures, but an abnormal HRCT was predictive of progression. Patients with CIF and multiple positive NTM cultures, characteristic HRCT findings, and progression of HRCT changes should be monitored closely and considered for antimycobacterial therapy. C1 Wilford Hall USAF Med Ctr, MSGS, MCCP Pulm Crit Care, Lackland AFB, TX 78236 USA. RP Olivier, KN (reprint author), Wilford Hall USAF Med Ctr, MSGS, MCCP Pulm Crit Care, Wilford Hall,2200 Bergquist Dr,Ste 1, Lackland AFB, TX 78236 USA. NR 26 TC 104 Z9 107 U1 0 U2 5 PU AMER THORACIC SOC PI NEW YORK PA 1740 BROADWAY, NEW YORK, NY 10019-4374 USA SN 1073-449X J9 AM J RESP CRIT CARE JI Am. J. Respir. Crit. Care Med. PD MAR 15 PY 2003 VL 167 IS 6 BP 835 EP 840 DI 10.1164/rccm.200207-679OC PG 6 WC Critical Care Medicine; Respiratory System SC General & Internal Medicine; Respiratory System GA 653MA UT WOS:000181439100007 ER PT J AU Peterson, D AF Peterson, D TI Gridline graphs: a review in two dimensions and an extension to higher dimensions SO DISCRETE APPLIED MATHEMATICS LA English DT Review DE graph of a (0-1)-matrix; adjacency graph; checked graph; gridline graph; line graph of a bipartite graph; clique graph; perfect graph ID PERFECT AB Gridline graphs can be realized in the plane with vertices adjacent whenever they are on a common vertical or horizontal line. We review some applications and characterizations, e.g. they are line graphs of bipartite graphs, and provide practical O(\V\(3)) algorithms for some classical problems. We extend gridline graphs from the plane to higher dimensions. We characterize these graphs using a vertex coloring of the clique graph that corresponds to the conditions that, in the intersection graph of lines parallel to axes in R-n, any cycle of four lines must remain in two dimensions and any path between two given lines must traverse the same two dimensions. (C) 2002 Elsevier Science B.V. All rights reserved. C1 USAF Acad, Dept Math Sci, Colorado Springs, CO 80840 USA. RP Peterson, D (reprint author), USAF Acad, Dept Math Sci, 2354 Fairchild Dr,Suite 6D2A, Colorado Springs, CO 80840 USA. NR 16 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-218X J9 DISCRETE APPL MATH JI Discret Appl. Math. PD MAR 15 PY 2003 VL 126 IS 2-3 BP 223 EP 239 AR PII S0166-218X(02)00200-7 DI 10.1016/S0166-218X(02)00200-7 PG 17 WC Mathematics, Applied SC Mathematics GA 633GK UT WOS:000180274300005 ER PT J AU Klausen, J Vikesland, PJ Kohn, T Burris, DR Ball, WP Roberts, AL AF Klausen, J Vikesland, PJ Kohn, T Burris, DR Ball, WP Roberts, AL TI Longevity of granular iron in groundwater treatment processes: Solution composition effects on reduction of organohalides and nitroaromatic compounds SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID ZERO-VALENT IRON; PERMEABLE REACTIVE BARRIERS; NATURAL ORGANIC-MATTER; LONG-TERM PERFORMANCE; GOETHITE ALPHA-FEOOH; HUMIC SUBSTANCES; CHLORINATED ETHYLENES; CARBON-TETRACHLORIDE; REACTION-MECHANISM; MINERAL SURFACES AB Although granular iron permeable reactive barriers (PRBs) are increasingly employed to contain subsurface contaminants, information pertaining to system longevity is sparse. The present investigation redresses this situation by examining the long-term effects of carbonate, silica, chloride, and natural organic matter (NOM) on reactivity of Master Builders iron toward orgamohalides and nitroaromatic contaminants. Six Columns were operated for 1100 days (similar to4500 pore volumes) and five others for 407 days (similar to1800 pore volumes). Nine were continuously exposed to mixtures of contaminant species, while the other two were only intermittently exposed in order to differentiate deactivation induced by water(and inorganic cosolutes)from that resulting from contaminant reduction. Contaminants investigated were trichloroethylene, 1,2,3-trichloropropane, 1,1-dichloroethane, 2-nitrotoluene, 4-nitroacetophenone, and 4-nitroanisole. Column reactivity declined substantially over the first 300 days and was dependent on the feed solution chemistry. High carbonate concentrations enhanced reactivity slightly within the first 90 days but produced poorer performance over the long term. Both silica and NOM adversely affected reactivity, while chloride evinced a somewhat mixed effect. Observed contrasts in relative reactivities suggest that trichloroethylene, 1,2,3-trichloropropane, and nitroaromatic compounds all react at different types of reactive sites. Our results indicate that differences in groundwater chemistry should be considered in the PRB design process. C1 Johns Hopkins Univ, Dept Geog & Environm Engn, Baltimore, MD 21218 USA. USAF, Res Lab, Tyndall AFB, FL 32403 USA. RP Klausen, J (reprint author), Virginia Polytech Inst & State Univ, Dept Civil & Environm Engn, 415 Durham Hall, Blacksburg, VA 24061 USA. RI Ball, William/A-3285-2010; Lucas, Elizabeth/E-2733-2010; Kohn, Tamar/H-1430-2011; Roberts, A. Lynn/A-3295-2010; Vikesland, Peter/B-3960-2013 OI Ball, William/0000-0001-5217-8108; Kohn, Tamar/0000-0003-0395-6561; Vikesland, Peter/0000-0003-2654-5132 NR 74 TC 131 Z9 138 U1 4 U2 40 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD MAR 15 PY 2003 VL 37 IS 6 BP 1208 EP 1218 DI 10.1021/es025965s PG 11 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 656VH UT WOS:000181629700024 PM 12680677 ER PT J AU Johnstone, PAS Riffenburgh, RH Moul, JW Sun, L Wu, HY McLeod, DG Kane, CJ Martin, DD Kusuda, L Lance, R Douglas, R Donahue, T Beat, MG Foley, J Chung, A Soderdahl, D Do, J Amling, CL AF Johnstone, PAS Riffenburgh, RH Moul, JW Sun, L Wu, HY McLeod, DG Kane, CJ Martin, DD Kusuda, L Lance, R Douglas, R Donahue, T Beat, MG Foley, J Chung, A Soderdahl, D Do, J Amling, CL TI Effect of age on biochemical disease-free outcome in patients with T1-T3 prostate cancer treated with definitive radiotherapy in an equal-access health care system: A radiation oncology report of the department of defense center for prostate disease research SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS LA English DT Article; Proceedings Paper CT 44th Annual Meeting of the American-Society-for-Therapeutic-Radiology-and-Oncology CY OCT 06-10, 2002 CL NEW ORLEANS, LA SP Amer Soc Therapeut Radiol & Oncol DE prostate neoplasms; radiotherapy; outcomes ID EXTERNAL-BEAM RADIATION; MEN LESS; THERAPY; ADENOCARCINOMA; OLD; PROGNOSIS; CARCINOMA; YOUNGER; ANTIGEN; RACE AB Purpose: It has traditionally been a common perception that young age is a negative prognostic factor in prostate cancer (CaP). Furthermore, many urologists believe that younger patients are better suited to surgery rather than radiotherapy (RT) because of this perception. However, the data on the effect of age on outcome in patients with CaP are unclear. The records of the Department of Defense Center for Prostate Disease Research were queried for the biochemical disease-free results of patients after definitive RT and analyzed by age. Methods and Materials: The records of 1018 patients with T1-T3 CaP treated with definitive RT between 1988 and 2000 were reviewed. The records of patients receiving adjuvant hormonal therapy or adjuvant or salvage RT postoperatively were excluded. Biochemical failure was calculated by the American Society for Therapeutic Radiology and Oncology criteria. The median potential follow-up was 85.3 months as of December 31, 2001. Results: Age did not affect biochemical disease-free survival significantly when considered as <60 vs. greater than or equal to60 years (p = 0.646), by decade (p = 0.329), or as a continuous variable (correlation coefficient r = 0.017, regression slope = 0.007, with p = 0.588 and R-2 < 0.001). Using multiple regression analysis, age was still not significant (p = 0.408). Other variables analyzed were pretreatment prostate-specific antigen level (p < 0.001), Gleason sum (p = 0.023), stage (p = 0.828), and RT dose (p = 0.033). Conclusion: Age and biochemical disease-free survival after RT for CaP are not related. Age may not be a valid factor in choosing between primary treatment options for CaP. (C) 2003 Elsevier Science Inc. C1 USN, San Diego Med Ctr, KCA, Clin Invest Dept, San Diego, CA 92134 USA. Emory Univ, Sch Med, Atlanta, GA 30322 USA. Uniformed Serv Univ Hlth Sci, Ctr Prostate Dis Res, Dept Surg, Bethesda, MD USA. Walter Reed Army Med Ctr, Washington, DC 20307 USA. Univ Calif San Francisco, Sch Med, San Francisco, CA 94143 USA. USN, Ctr Med, Portsmouth, VA USA. Madigan Army Med Ctr, Tacoma, WA 98431 USA. Natl Naval Med Ctr, Bethesda, MD USA. Brooke Army Med Ctr, San Antonio, TX USA. Malcolm Grow Med Ctr, Andrews AFB, MD USA. RP USN, San Diego Med Ctr, KCA, Clin Invest Dept, 34800 Bob Wilson Dr,Ste 5, San Diego, CA 92134 USA. EM pajohnstone@nmcsd.med.navy.mil NR 27 TC 19 Z9 19 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0360-3016 EI 1879-355X J9 INT J RADIAT ONCOL JI Int. J. Radiat. Oncol. Biol. Phys. PD MAR 15 PY 2003 VL 55 IS 4 BP 964 EP 969 DI 10.1016/S0360-3016(02)04283-9 PG 6 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA 650NE UT WOS:000181269600013 PM 12605974 ER PT J AU Jovanovic, VD Ikonic, Z Indjin, D Harrison, P Milanovic, V Soref, RA AF Jovanovic, VD Ikonic, Z Indjin, D Harrison, P Milanovic, V Soref, RA TI Designing strain-balanced GaN/AlGaN quantum well structures: Application to intersubband devices at 1.3 and 1.55 mu m wavelengths SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID MOLECULAR-BEAM EPITAXY; RAY PHOTOEMISSION SPECTROSCOPY; MACROSCOPIC POLARIZATION; ABSORPTION; RANGE; HETEROSTRUCTURES; SUPERLATTICES; TRANSITIONS; GAN; ALN AB A criterion for strain balancing of wurtzite group-III nitride-based multilayer heterostructures is presented. Single and double strain-balanced GaN/AlGaN quantum well structures are considered with regard to their potential application in optoelectronic devices working at communication wavelengths. The results for realizable, strain-balanced structures are presented in the form of design diagrams that give both the intersubband transition energies and the dipole matrix elements in terms of the structural parameters. The optimal parameters for structures operating at lambdasimilar to1.3 and 1.55 mum were extracted and a basic proposal is given for a three level intersubband laser system emitting at 1.55mum and depopulating via resonant longitudinal optical (LO) phonons (homega(LO)approximate to90 meV). (C) 2003 American Institute of Physics. C1 Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England. Sch Elect Engn, YU-11120 Belgrade, Yugoslavia. USAF, Sensor Directorate, Res Lab, AFRL SNHC, Hanscom AFB, MA 01731 USA. RP Jovanovic, VD (reprint author), Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England. NR 27 TC 36 Z9 37 U1 2 U2 12 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 MAR 15 PY 2003 VL 93 IS 6 BP 3194 EP 3197 DI 10.1063/1.1556177 PG 4 WC Physics, Applied SC Physics GA 652JQ UT WOS:000181376400010 ER PT J AU Allakhverdiev, K Fernelius, N Gashimzade, F Goldstein, J Salaev, E Salaeva, Z AF Allakhverdiev, K Fernelius, N Gashimzade, F Goldstein, J Salaev, E Salaeva, Z TI Anisotropy of optical absorption in GaSe studied by midinfrared spectroscopy SO JOURNAL OF APPLIED PHYSICS LA English DT Article AB Slab samples of epsilon-GaSe have been prepared with the optical axis (the c axis) in the plane of the face. Previously, most optical studies were made on slabs cleaved from crystals, which have the c axis perpendicular to the face. The infrared absorption spectra of epsilon-GaSe were measured at room temperature in the spectral range of 4000-450 cm(-1) for the e-ray (polarized parallel to the optical axis) and the o-ray (polarized perpendicular to the optical axis). The maximum value of the optical absorption coefficient, alpha, for both geometries, does not exceed 2.5 cm-1 (Eparallel toc). We find anisotropy in the transmission in the spectral range below similar to2250 cm(-1), due to the free carrier absorption, only in the e ray. At T=300 K, acoustic lattice vibrations are the dominant scattering mechanism for carriers moving parallel to the c axis. Absorption bands were observed in e-ray spectra at 891, 945, 1093, and 1270 cm(-1). These bands may be due to multiphonon absorption, or to localized vibrational modes stemming from unintentional impurities. It is suggested that the sharp absorption at 891 cm(-1) may be due to hole transitions from the lowest-lying valence band in the center of the Brillouin zone to the top of the valence band (Gamma(6)(+)-->Gamma(4)(-) transition). (C) 2003 American Institute of Physics. C1 Marmara Res Ctr Tubitak, Mat & Chem Technol Res Inst, TR-41470 Gebze, Turkey. Azerbaijan Acad Sci, Inst Phys, Baku 370143, Azerbaijan. USAF, Mat Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA. RP Allakhverdiev, K (reprint author), Marmara Res Ctr Tubitak, Mat & Chem Technol Res Inst, PK 21, TR-41470 Gebze, Turkey. NR 16 TC 20 Z9 24 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAR 15 PY 2003 VL 93 IS 6 BP 3336 EP 3339 DI 10.1063/1.1556175 PG 4 WC Physics, Applied SC Physics GA 652JQ UT WOS:000181376400031 ER PT J AU Kim, JH Shin, DH Semiatin, SL Lee, CS AF Kim, JH Shin, DH Semiatin, SL Lee, CS TI High temperature deformation behavior of a gamma TiAl alloy determined using the load-relaxation test SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE deformation; gamma-TiAl; dislocation climb; dynamic recrystallization; cavitation ID SUPERPLASTIC DEFORMATION; TITANIUM ALUMINIDE; CREEP DEFORMATION; ACCOMMODATION MODE; TI-6AL-4V ALLOY; SINGLE-PHASE; CAVITATION AB The high temperature deformation behavior of a two-phase gamma TiAl alloy was investigated as a function of temperature and gamma/alpha(2) volume fraction. For this purpose, load-relaxation and tension tests were conducted at temperatures ranging from 800 to 1050 degreesC. When a small amount of deformation was imposed (epsilon approximate to 0.04), the experimental stress-versus-strain-rate data for the fine-grained TiAl alloy were well fit by predictions based on grain-matrix deformation and dislocation climb derived from the inelastic deformation theory. Evidence of grain-boundary sliding was not observed in this instance. However, after a large amount of pre-deformation (epsilon approximate to 0.8), the constitutive behavior changed significantly, indicating that grain-boundary sliding was also operating, an effect attributable to the occurrence of dynamic recrystallization during the deformation. With an increase in the volume fraction of the 92 phase, the flow stress for grain-matrix deformation was not varied, but that of dislocation climb decreased significantly. It was also found that the gamma/alpha(2) boundaries were more susceptible to cavity initiation than the gamma/gamma boundaries. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Pohang Univ Sci & Technol, Ctr Adv Aerosp Mat, Dept Mat Sci & Engn, Pohang 790784, South Korea. Hanyang Univ, Ansan, Kyunggi Do, South Korea. USAF, AFRL, MLLMP, Wright Patterson AFB, OH 45433 USA. RP Lee, CS (reprint author), Pohang Univ Sci & Technol, Ctr Adv Aerosp Mat, Dept Mat Sci & Engn, San 31, Pohang 790784, South Korea. RI Lee, Chong Soo/F-5814-2013; SEMIATIN, SHELDON/E-7264-2017 NR 36 TC 20 Z9 21 U1 1 U2 10 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD MAR 15 PY 2003 VL 344 IS 1-2 BP 146 EP 157 AR PII S0921-5093(02)00405-7 DI 10.1016/S0921-5093(02)00405-7 PG 12 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 635FX UT WOS:000180389300018 ER PT J AU Zhang, XD Evans, DJ Baeslack, WA Fraser, HL AF Zhang, XD Evans, DJ Baeslack, WA Fraser, HL TI Effect of long term aging on the microstructural stability and mechanical properties of Ti-6Al-2Cr-2Mo-2Sn-2Zr alloy SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE titanium; microstructure; nucleation/growth; intermetallic; optical microscopy ID ALPHA TITANIUM-ALLOY; ROOM-TEMPERATURE; LAVES PHASE; PRECIPITATION; BEHAVIOR; TI-1100 AB Microstructural development after long term aging and its effect on the mechanical properties have been investigated in Ti-6Al-2Cr-2Mo-2Sn-2Zr alloy. Four types of precipitates have been identified in the alloy, they are alpha(2)-Ti3Al, omega, silicides and alpha-TiCr2 Laves phase. alpha(2)-Ti3Al and omega are observed in the as-received materials and all aged samples. Silicides, (Ti, Zr)(x) Si-3 (5 less than or equal to x less than or equal to 6), are found in the specimens aged at 550-650 degreesC over 500 h. The silicides have a hexagonal structure with a lattice parameter: a = 7.01 +/- 0.03, c = 3.63+/-0.06 Angstrom. The orientation relation between the silicides and the parent beta-phase has been determined as: [111]beta//[0001](silicide), (101)(beta)//(1100)(silicide). Laves phase alpha-(Ti, Zr)Cr-2 is observed in the samples aged at 450-550 degreesC over 500h. It has a cubic structure (a=7.12+/-0.03 Angstrom) with an orientation relationship with the alpha- and beta-Ti matrix: [110](alpha-TiCr2)//[0001](alpha-Ti)//[110](beta-Ti), ((1) over bar 13)(alpha-TiCr2)//((1) over bar 100)(beta-Ti). Longterm aging in the temperature range of 450-550 degreesC results insignificant decrease of fracture toughness and increase of intergranular failure, due to precipitation of alpha(2)-Ti3Al and alpha-(Ti, Zr)Cr-2 Laves phase. No considerable change in fracture toughness for the samples aged at 650 degreesC up to 1000 h is found in spite of precipitation of the alpha(2)-Ti3Al and the silicides. The retention of fracture toughness after aging at these temperatures has been attributed to coarsening of secondary alpha-Ti platelets during the aging treatment. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Ohio State Univ, Columbus, OH 43210 USA. USAF, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. RP Zhang, XD (reprint author), Agere Syst, 4E-143D,9999 Hamilton Blvd, Breinigsville, PA 18031 USA. NR 36 TC 19 Z9 20 U1 2 U2 16 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD MAR 15 PY 2003 VL 344 IS 1-2 BP 300 EP 311 AR PII S0921-5093(02)00448-3 DI 10.1016/S0921-5093(02)00448-3 PG 12 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 635FX UT WOS:000180389300036 ER PT J AU Atwell, AR Okojie, RS Kornegay, KT Roberson, SL Beliveau, A AF Atwell, AR Okojie, RS Kornegay, KT Roberson, SL Beliveau, A TI Simulation, fabrication and testing of bulk micromachined 6H-SiC high-g piezoresistive accelerometers SO SENSORS AND ACTUATORS A-PHYSICAL LA English DT Article DE silicon carbide; MEMS; accelerometer; shock testing; piezoresistivity ID SENSORS; SILICON AB We report the utilization of key design parameters to simulate, batch-fabricate and evaluate first-generation single crystal 6H-SiC piezoresistive accelerometers for extreme impact applications. High-g simulation results predicted safe operation above 100,000 x g and preliminary experimental tests were successfully performed to 40,000 x g. Sensitivities ranging between 50 and 343 nV/g were measured for differing accelerometer sensing elements. Non-linear behavior was observed over the shock range relative to the commercial benchmark accelerometer. These initial results offer promise for the use of 6H-SiC accelerometers in extreme impact sensing. (C) 2002 Elsevier Science B.V. All rights reserved. C1 NASA, Glenn Res Ctr, Instrumentat Controls Div, Cleveland, OH 44135 USA. Cornell Univ, Sch Elect & Comp Engn, Ithaca, NY 14853 USA. USAF, Res Lab, Munit Directorate, MNMF,Fuzes Branch, Eglin AFB, FL 32542 USA. Appl Res Associates, Ft Walton Beach, FL 32547 USA. RP Atwell, AR (reprint author), Inst Def Anal, OED, 4850 Mark Ctr Dr, Alexandria, VA 22311 USA. NR 15 TC 48 Z9 54 U1 1 U2 15 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0924-4247 J9 SENSOR ACTUAT A-PHYS JI Sens. Actuator A-Phys. PD MAR 15 PY 2003 VL 104 IS 1 BP 11 EP 18 AR PII S0924-4247(02)00436-3 DI 10.1016/S0924-4247(02)00436-3 PG 8 WC Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA 649YT UT WOS:000181236100003 ER PT J AU Duff, JW Dothe, H Sharma, RD AF Duff, JW Dothe, H Sharma, RD TI On the rate coefficient of the N(D-2)+O2 -> NO+O reaction in the terrestrial thermosphere SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID POTENTIAL-ENERGY SURFACE; NITRIC-OXIDE; AB-INITIO; MODEL; ATMOSPHERE; KINETICS; RADIANCE; VTST AB [1] The temperature dependence of the rate coefficient of the N(D-2)+O-2-->NO+O reaction has been determined using ab initio potential energy surfaces (PES) and classical dynamics. The calculation agrees with the recommended rate coefficient at 300 K (similar to110 km altitude). The rate coefficient is given by the expression k(T) = 6.2 x 10(-12)(T/300) cm(3)/s/molec. In contrast to the nearly temperature-independent value of this rate coefficient previously recommended, the value given here increases by almost a factor of about four as the altitude increases from 110 to 200 km. It is also shown that even though N(D-2) atoms in the thermosphere are produced with large translational energies, using the value of the rate coefficient at the local temperature introduces negligible error in the amount of NO produced. The new value of this rate coefficient will significantly increase the amount of NO computed in the aeronomic models causing a re-evaluation of the heat budget and temperature and density structure of the thermosphere. In particular, implications of the larger rate coefficient for the recent observations of dramatically enhanced 5.3 mum emission from NO in the thermosphere due to solar storms are discussed. C1 Spectral Sci Inc, Burlington, MA 01803 USA. USAF, Res Lab, Space Vehicles Directorate VSSSE, Hanscom AFB, MA 01731 USA. RP Duff, JW (reprint author), Spectral Sci Inc, 99 S Bedford St, Burlington, MA 01803 USA. NR 23 TC 10 Z9 10 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD MAR 14 PY 2003 VL 30 IS 5 AR 1259 DI 10.1029/2002GL016720 PG 4 WC Geosciences, Multidisciplinary SC Geology GA 665ZW UT WOS:000182152000005 ER PT J AU Maynard, NC AF Maynard, NC TI Responses of the open-closed field line boundary in the evening sector to IMF changes: A source mechanism for Sun-aligned arcs (vol 108, art no 1006, 2003) SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Correction C1 USAF, Res Lab, Hanscom AFB, MA 01731 USA. RI Scudder, Jack/D-8417-2013; Peterson, WK/A-8706-2009 OI Scudder, Jack/0000-0001-7975-5630; Peterson, WK/0000-0002-1513-6096 NR 2 TC 14 Z9 15 U1 0 U2 8 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9380 EI 2169-9402 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD MAR 14 PY 2003 VL 108 IS A3 AR 1113 DI 10.1029/2003JA009848 PG 1 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 667BU UT WOS:000182211600008 ER PT J AU Hwang, ES Castle, KJ Dodd, JA AF Hwang, ES Castle, KJ Dodd, JA TI Vibrational relaxation of NO(nu=1) by oxygen atoms between 295 and 825 K SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE vibrational; relaxation; nitric oxide; oxygen atom; energy budget ID STATE DISTRIBUTION; PHOTODISSOCIATION; TEMPERATURE; COLLISIONS; ATMOSPHERE; RETRIEVAL; ENERGY; IMPACT AB [1] Vibrational excitation of ground-state NO through collisions with oxygen atoms produces NO(nu = 1) in the lower thermosphere, representing a significant source of atmospheric cooling through the subsequent 5.3-mum radiative emission. A laser pump-probe experiment has been used to measure the temperature dependence of the NO(nu = 1)-O vibrational relaxation rate coefficient k(O)(nu = 1) in the 295-825 K range, along with updated measurements of k(O)(nu = 1,2) at room temperature. The experiment employed a continuous wave microwave source to form O atoms, combined with photolysis of a trace amount of added NO2 to produce vibrationally excited NO. Oxygen atoms were detected through two-photon laser-induced fluorescence, cross-calibrated against a normalized O atom signal resulting from photolysis of a known concentration of NO2. No temperature dependence was observed for k(O)(v = 1) to within the uncertainty in the measurements. The measured room temperature value of k(O)(nu = 1) = (4.2 +/- 0.7) x 10(-11) cm(2) s(-1) is 75% larger than the value obtained previously in this laboratory, a significant difference at the 1sigma level. The present value is preferred owing to an improved experimental technique. The atmospherically relevant NO(nu = 0)-O vibrational excitation rate coefficient can be derived from measured values of k(O)(nu = 1) through detailed balance. The variable temperature measurements provide key information for aeronomic models of the lower thermospheric energy budget, infrared emission intensities, and neutral constituent densities. C1 USAF, Space Vehicles Directorate, VSBT, Bedford, MA 01731 USA. Stewart Radiance Lab, Bedford, MA 01730 USA. RP Hwang, ES (reprint author), Stewart Radiance Lab, 139 The Great Rd, Bedford, MA 01730 USA. NR 23 TC 16 Z9 16 U1 1 U2 4 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD MAR 13 PY 2003 VL 108 IS A3 AR 1109 DI 10.1029/2002JA009688 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 667BT UT WOS:000182211500002 ER PT J AU Drummond, J Milster, S Ryan, P Roberts, LC AF Drummond, J Milster, S Ryan, P Roberts, LC TI iota Cassiopeiae: Orbit, masses, and photometry from adaptive optics imaging in the I and H bands SO ASTROPHYSICAL JOURNAL LA English DT Article DE binaries : visual instrumentation : adaptive optics stars : fundamental parameters; stars : individual (iota Cassiopeiae) techniques : high angular resolution ID BINARY STARS; SYSTEM; RANGE AB The multiple-star system iota Cas was observed as a calibration for our adaptive optics observations in 2001 July with the Advanced Electro-Optical System (AEOS) 3.63 m telescope in Maui, Hawaii, and the first ever image of the faint astrometric component Aa (along with A and B) was obtained at the H-band wavelength. Another image was obtained in 2002 February with the same telescope, but that time in the I band. This wider image includes the C component and is the first to show four components. By combining our images with seven recent speckle interferometry measurements, a 47 yr period relative orbit is derived for the A-Aa components. Comparing the motion of B with respect to the A-Aa system, previous A-B orbits are rejected in favor of simple rectilinear motion of B across the field. Nevertheless, the history of the relative vector separation between B and A reveals the suborbital motion of A around its center of gravity with Aa, leading to a true orbit for A. The masses of A and Aa are thus determined to be 1.99 +/- 0.28 and 0.69 +/- 0.12 M., respectively. Combining our differential photometry in the I and H bands with B and V information from the Tycho-2 catalog, we derive spectral types for all four from their colors: component A is spectral type A3 with peculiar red colors, Aa is G6, B is F5, and C is K3. C1 USAF, Res Lab, Directed Energy Directorate, Starfire Opt Range, Kirtland AFB, NM 87117 USA. Boeing Co, Kihei, HI 96753 USA. RP Drummond, J (reprint author), USAF, Res Lab, Directed Energy Directorate, Starfire Opt Range, Kirtland AFB, NM 87117 USA. NR 14 TC 5 Z9 5 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 10 PY 2003 VL 585 IS 2 BP 1007 EP 1014 DI 10.1086/346224 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 650WU UT WOS:000181287200038 ER PT J AU Das, GP Yeates, AT Dudis, DS AF Das, GP Yeates, AT Dudis, DS TI Ab initio fragment orbital-based theory SO INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY LA English DT Article; Proceedings Paper CT 42nd Annual Sanibel Symposium CY FEB 23-MAR 01, 2002 CL ST AUGUSTINE, FLORIDA DE ab initio model; fragmented model; ab initio fragment orbital-based theory; scaling; large system theory ID 2-PHOTON ABSORPTION; SYSTEMS AB A new formulation of ab initio theory is presented that treats a large molecule in terms of wave functions of its constituent molecular subunits (to be called fragments). The method aims to achieve near conventional ab initio accuracy but using a truncated set of fragment orbitals with a consequent drastic reduction of computing time and storage requirement. Illustrative calculations are presented for the molecule amino-nitro-stilbene. (C) 2003 Wiley Periodicals, Inc. C1 USAF, Res Lab, Div Mat, Wright Patterson AFB, OH 45433 USA. RP Das, GP (reprint author), USAF, Res Lab, Div Mat, Wright Patterson AFB, OH 45433 USA. NR 8 TC 10 Z9 10 U1 0 U2 0 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0020-7608 J9 INT J QUANTUM CHEM JI Int. J. Quantum Chem. PD MAR 5 PY 2003 VL 92 IS 1 BP 22 EP 28 DI 10.1002/qua.10493 PG 7 WC Chemistry, Physical; Mathematics, Interdisciplinary Applications; Physics, Atomic, Molecular & Chemical SC Chemistry; Mathematics; Physics GA 643QT UT WOS:000180872500003 ER PT J AU Luo, B Kim, J Ren, F Gillespie, JK Fitch, RC Sewell, J Dettmer, R Via, GD Crespo, A Jenkins, TJ Gila, BP Onstine, AH Allums, KK Abernathy, CR Pearton, SJ Dwivedi, R Fogarty, TN Wilkins, R AF Luo, B Kim, J Ren, F Gillespie, JK Fitch, RC Sewell, J Dettmer, R Via, GD Crespo, A Jenkins, TJ Gila, BP Onstine, AH Allums, KK Abernathy, CR Pearton, SJ Dwivedi, R Fogarty, TN Wilkins, R TI Electrical characteristics of proton-irradiated Sc2O3 passivated AlGaN/GaN high electron mobility transistors SO APPLIED PHYSICS LETTERS LA English DT Article ID FIELD-EFFECT-TRANSISTORS; SURFACE PASSIVATION; POWER; HEMTS; PERFORMANCE; DC; DIELECTRICS; SIGNAL; HFETS AB Sc2O3-passivated AlGaN/GaN high electron mobility transistors (HEMTs) were irradiated with 40 MeV protons to a fluence corresponding to approximately 10 years in low-earth orbit (5x10(9) cm(-2)). Devices with an AlGaN cap layer showed less degradation in dc characteristics than comparable GaN-cap devices, consistent with differences in average band energy. The changes in device performance could be attributed completely to bulk trapping effects, demonstrating that the effectiveness of the Sc2O3 layers in passivating surface states in the drain-source region was undiminished by the proton irradiation. Sc2O3-passivated AlGaN/HEMTs appear to be attractive candidates for space and terrestrial applications where resistance to high fluxes of ionizing radiation is a criteria. (C) 2003 American Institute of Physics. C1 Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA. USAF, Sensors Directorate, Res Lab, Wright Patterson AFB, OH 45433 USA. Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA. Prairie View A&M Univ, Ctr Appl Radiat Res, Prairie View, TX 77446 USA. RP Luo, B (reprint author), Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA. RI Kim, Jihyun/F-6940-2013 NR 31 TC 27 Z9 28 U1 1 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 3 PY 2003 VL 82 IS 9 BP 1428 EP 1430 DI 10.1063/1.1559631 PG 3 WC Physics, Applied SC Physics GA 649HP UT WOS:000181201800036 ER PT J AU Alfano, AJ Christe, K Corley, RC AF Alfano, AJ Christe, K Corley, RC TI Singlet delta oxygen production from a gas-solid reaction. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 ERC Inc, USAF, Res Lab, Edwards AFB, CA 93524 USA. Univ So Calif, Los Angeles, CA USA. EM angelo.alfano@edwards.af.mil RI Christe, Karl/O-4885-2014 OI Christe, Karl/0000-0003-0661-5519 NR 0 TC 0 Z9 0 U1 2 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 499-INOR BP U86 EP U87 PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918000496 ER PT J AU Anderson, KL Sinsawa, A Vaia, RA Farmer, BL AF Anderson, KL Sinsawa, A Vaia, RA Farmer, BL TI Multi-scale modeling of polymer-silicate nanocomposites SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 042-COMP BP U708 EP U708 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917803373 ER PT J AU Baek, JB Lyons, CB Tan, LS AF Baek, JB Lyons, CB Tan, LS TI Polymerization of-3-phenoxybenzoic acid in the presence of vapor-grown carbon nanofiber. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 Univ Dayton, Res Inst, AFRL, MLBP,UDRI, Dayton, OH 45469 USA. USAF, Res Lab, MLBP, Wright Patterson AFB, OH 45433 USA. EM Loon-Seng.Tan@wpafb.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 253-POLY BP U569 EP U569 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918002950 ER PT J AU Baek, JB Lyons, CB Tan, LS AF Baek, JB Lyons, CB Tan, LS TI Synthesis and some properties of hyperbranched polyaryleneetherketone(PEK)-co-polybenzobisthiazole(PBZT)-cohyperbranche d polyaryleneetherketone(PEK) ABA triblock copolymers. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 Univ Dayton, Res Inst, AFRL, MLBP,UDRI, Dayton, OH 45469 USA. USAF, Res Lab, MLBP, Wright Patterson AFB, OH 45433 USA. EM Loon-Seng.Tan@wpafb.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 200-POLY BP U561 EP U561 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918002897 ER PT J AU Boatz, JA Christe, K Haiges, R Schneider, S Schroer, T Vij, A Vij, V Wilson, W AF Boatz, JA Christe, K Haiges, R Schneider, S Schroer, T Vij, A Vij, V Wilson, W TI Toward new polynitrogen species: The search for viable precursors. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 USAF, Res Lab, Propuls Sci Div AFRL PRSP, Edwards AFB, CA 93524 USA. Univ So Calif, Loker Hydrocarbon Res Inst, Los Angeles, CA 90089 USA. Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA. USAF, Res Lab, HEDM Grp, Edwards AFB, CA USA. EM Jerry.Boatz@edwards.af.mil RI Vij, Ashwani/A-2836-2012; Christe, Karl/O-4885-2014 OI Vij, Ashwani/0000-0003-1144-4080; Christe, Karl/0000-0003-0661-5519 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 453-INOR BP U79 EP U79 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918000450 ER PT J AU Chambreau, SD Hwang, ES Dodd, JA AF Chambreau, SD Hwang, ES Dodd, JA TI Atomic oxygen beam source for investigating high-energy O plus hydrocarbon reactions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 USAF, Res Lab, VSBT, Hanscom AFB, MA 01731 USA. Stewart Radiance Lab, Bedford, MA USA. EM Steven.Chambreau@hanscom.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 321-PHYS BP U480 EP U480 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918002496 ER PT J AU Chen, CG Curliss, D AF Chen, CG Curliss, D TI Preparation and exfoliation mechanism of the epoxy nanocomposite. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 Univ Dayton, Res Inst, Nonmet Div, Dayton, OH 45469 USA. USAF, Res Lab, Mat & Mfg Directorate, Washington, DC USA. EM Chenggang.Chen@wpafb.af.mil NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 53-PMSE BP U668 EP U668 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918003472 ER PT J AU Christe, K AF Christe, K TI Lifelong pursuit of "impossible" chemistry. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 Univ So Calif, Loker Hydrocarbon Res Inst, Los Angeles, CA 90089 USA. USAF, Res Lab, Edwards AFB, CA 93524 USA. EM kchriste@methyl.usc.edu RI Christe, Karl/O-4885-2014 OI Christe, Karl/0000-0003-0661-5519 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 288-INOR BP U53 EP U53 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918000285 ER PT J AU Dang, TD Koerner, H Dalton, MJ Iacobucci, A Venkatasubramanian, N Arnold, FE AF Dang, TD Koerner, H Dalton, MJ Iacobucci, A Venkatasubramanian, N Arnold, FE TI Sulfo-pendent poly(p-phenylenebenzobisazole) rigid-rods: Synthesis and fiber structural studies. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 USAF, Res Lab, Polymer Branch, MLBP, Wright Patterson AFB, OH 45433 USA. Univ Dayton, Res Inst, Dayton, OH 45469 USA. Wright State Univ, Dept Chem, Dayton, OH 45435 USA. EM thuy.dang@wpafb.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 254-POLY BP U569 EP U569 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918002951 ER PT J AU Day, PN Nguyen, KA Pachter, R AF Day, PN Nguyen, KA Pachter, R TI Theoretical predictions of two-photon absorption in substituted stilbenes: A time-dependent density functional theory study SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF, Res Lab, AFRL, MLPJ,Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. EM pau.day@wpafb.af.mil NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 313 BP U781 EP U781 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917803642 ER PT J AU Dixon, DA Christe, K AF Dixon, DA Christe, K TI High-level ab initio model orbital studies of novel inorganic compounds. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. Univ So Calif, Los Angeles, CA USA. USAF, Res Lab, Edwards AFB, CA USA. EM david.dixon@pnl.gov RI Christe, Karl/O-4885-2014 OI Christe, Karl/0000-0003-0661-5519 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 448-INOR BP U79 EP U79 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918000445 ER PT J AU Dodd, JA Castle, KJ Hwang, ES DeBoer, GD AF Dodd, JA Castle, KJ Hwang, ES DeBoer, GD TI Products of high-velocity O-ethylene collisions detected via time-resolved FTIR emission spectroscopy. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 USAF, Res Lab, VSBT, Hanscom AFB, MA 01731 USA. Bucknell Univ, Dept Chem, Lewisburg, PA 17837 USA. LeTourneau Univ, Dept Chem & Phys, Longview, TX USA. EM James.Dodd@hanscom.af.mil NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 266-PHYS BP U472 EP U472 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918002441 ER PT J AU Doyle, SL Rohrbough, JG Hicks, BW AF Doyle, SL Rohrbough, JG Hicks, BW TI Investigating recombinant food-based vaccines for salmonids: Developing strategies to combat whirling disease. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF Acad, Dept Chem, Colorado Springs, CO 80840 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 909-CHED BP U492 EP U492 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917802215 ER PT J AU Duan, XFF Akdim, B Pachter, R AF Duan, XFF Akdim, B Pachter, R TI Effects of O2 adsorbates on field emission properties in single-wall carbon nanotubes: A density functional theory study SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 Major Shared Resource Ctr High Performance Comp, Wright Patterson AFB, OH 45433 USA. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. EM xiaofeng.duan@wpafb.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 022-COMP BP U705 EP U705 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917803354 ER PT J AU Dudis, DS Ryan, JJ Yeats, AT AF Dudis, DS Ryan, JJ Yeats, AT TI Cisoid defects in all-trans polyenes and polyacetylene SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF, Res Lab, Polymer Grp, AFRL,MLBP, Wright Patterson AFB, OH 45433 USA. USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. EM doug.dudis@afrl.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 354 BP U786 EP U787 PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917803681 ER PT J AU Dudis, DS Yeates, AT Blaudeau, JP AF Dudis, DS Yeates, AT Blaudeau, JP TI Electron affinities and Jahn-Teller distortions in C60 anions SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF, Res Lab, MLBP, Polymer Grp, Wright Patterson AFB, OH 45433 USA. USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Ohio State Univ, Dept Chem, Columbus, OH 43210 USA. EM doug.dudis@afrl.af.mil NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 024-COMP BP U705 EP U705 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917803356 ER PT J AU Farmer, BL AF Farmer, BL TI Careers for chemists in the Air Force SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. EM barry.farmer@afrl.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 003-PRES BP U34 EP U34 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917800086 ER PT J AU Feld, WA Dalton, MJ Dang, TD Thiesing, NC Sims, SC McGinty, KM AF Feld, WA Dalton, MJ Dang, TD Thiesing, NC Sims, SC McGinty, KM TI Synthesis and polymerization of a diaminodiol containing a phosphine-oxide linkage. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 Wright State Univ, Dept Chem, Dayton, OH 45435 USA. AF Res Lab, Polymer Branch, Washington, DC USA. EM william.feld@wright.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 238-POLY BP U567 EP U567 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918002935 ER PT J AU Fossum, E AF Fossum, E TI Hyperbranched poly(arylene arylene phosphine oxide)s via an A(2)+B-3 approach. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 Wright State Univ, Dept Chem, Dayton, OH 45435 USA. USAF, Res Lab, Polymer Branch, AFRL,MLBP, Washington, DC USA. EM eric.fossum@wright.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 219-POLY BP U564 EP U564 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918002916 ER PT J AU Grote, JG AF Grote, JG TI Deoxyribonucleic acid (DNA) based cladding material for nonlinear optic polymer based electro-optic devices. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 USAF, Res Lab, AFRL MLPS, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. EM james.grote@wpafb.af.mil NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 105-PMSE BP U676 EP U676 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918003524 ER PT J AU Haddad, TS Moore, BM AF Haddad, TS Moore, BM TI POSS polystyrene copolymers: Reactivity ratios and control. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 ERC Inc, USAF, Res Lab, Edwards AFB, CA 93524 USA. ERC Corp, USAF, Res Lab, Edwards AFB, CA USA. EM timothy.haddad@edwards.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 0013-MTLS BP U60 EP U60 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917800181 ER PT J AU Haddad, TS Gonzalez, RI AF Haddad, TS Gonzalez, RI TI Organic polymers modified with inorganic polyhedra. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 USAF, Res Lab, ERC, AFRL PRSM, Edwards AFB, CA 93524 USA. EM tim.haddad@ple.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 703-INOR BP U134 EP U134 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918000697 ER PT J AU Haiges, R Boatz, JA Christe, K Gerken, M Schneider, S Schroer, T Tham, FS Vij, A AF Haiges, R Boatz, JA Christe, K Gerken, M Schneider, S Schroer, T Tham, FS Vij, A TI Main-group polyazido compounds. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 Univ So Calif, Loker Hydrocarbon Res Inst, Los Angeles, CA 90089 USA. USAF, Res Lab, Propuls Sci Div AFRL PRSP, Edwards AFB, CA USA. Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA. Univ Calif Riverside, Riverside, CA 92521 USA. ERC Inc, USAF, Res Lab, Edwards AFB, CA USA. EM haiges@usc.edu RI Vij, Ashwani/A-2836-2012; Christe, Karl/O-4885-2014 OI Vij, Ashwani/0000-0003-1144-4080; Christe, Karl/0000-0003-0661-5519 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 454-INOR BP U80 EP U80 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918000451 ER PT J AU Koerner, H Vaia, R Alexander, MD Wang, CS Pearce, NA Jacobs, JD Bentley, H Tomlin, DW AF Koerner, H Vaia, R Alexander, MD Wang, CS Pearce, NA Jacobs, JD Bentley, H Tomlin, DW TI Stimuli-responsive nanocomposites: Opening new horizons for aerospace systems. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 Univ Dayton, Res Inst, Dayton, OH 45469 USA. USAF, Res Lab, MLBP, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. EM hkoemer@ameritech.net; richard.vaia@wpafb.af.mil NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 0017-MTLS BP U60 EP U60 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917800185 ER PT J AU Lee, CYC AF Lee, CYC TI Afosr program in photonic polymers. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 USAF, Off Sci Res, AFOSRNL, Arlington, VA 22203 USA. EM charles.lee@afosr.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 105-PMSE BP U676 EP U676 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918003525 ER PT J AU Millemon, LF Hicks, BW Gardner, KA AF Millemon, LF Hicks, BW Gardner, KA TI EPR study of the DNA binding of a cisplatin analogue. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF Acad, Dept Chem, Colorado Springs, CO 80840 USA. EM C04Laura.Millemon@usafa.af.mil NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 890-CHED BP U489 EP U489 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917802196 ER PT J AU Mirau, PA Yang, S AF Mirau, PA Yang, S TI NMR studies of polymer interfaces in ordered hydrophobic organic/inorganic hybrids. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 USAF, MLBP, Res Lab, Wright Patterson AFB, OH 45433 USA. Lucent Technol, Bell Labs, Murray Hill, NJ USA. EM peter.mirau@wpafb.af.mil NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 439-POLY BP U596 EP U596 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918003136 ER PT J AU Morgan, ME Vines, SD AF Morgan, ME Vines, SD TI General chemistry experiments using the labworks interface and a pocket PC. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF Acad, Colorado Springs, CO 80840 USA. EM matt.morgan@usafa.af.mil; C03scott.vines@usa.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 280-CHED BP U365 EP U365 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917801587 ER PT J AU Nainaparampil, JJ Eapen, KC Zabinski, JS AF Nainaparampil, JJ Eapen, KC Zabinski, JS TI Atomic force microscope based analysis of monolayer failure under the influence of tribological stressing, surface temperature and electrostatic force. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF, Res Lab, AFRL MLBT, Wright Patterson AFB, OH 45433 USA. EM Jose.nain@wpafb.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 112-COLL BP U624 EP U625 PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917802863 ER PT J AU Nguyen, KA Rogers, JE Hufnagle, DC McLean, DG Vinogradov, S Su, WJ Gossett, KM Day, PN Pachter, R Fleitz, PA AF Nguyen, KA Rogers, JE Hufnagle, DC McLean, DG Vinogradov, S Su, WJ Gossett, KM Day, PN Pachter, R Fleitz, PA TI Observation and interpretation of annulated porphyrins: Effects of distortion and conjugation on spectroscopic properties of meso-tetraphenylmetalloporphyrins SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF, Res Lab, Mat & Mfg Directorate, AFLF,MLPJ, Wright Patterson AFB, OH 45433 USA. Univ Penn, Dept Biochem & Biophys, Philadelphia, PA 19104 USA. EM kiet.nguyen@wpafb.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 310 BP U780 EP U780 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917803639 ER PT J AU O'Keefe, KB Roth, EP Heimer, NE Balaich, GJ AF O'Keefe, KB Roth, EP Heimer, NE Balaich, GJ TI Crystal structure of a C2-symmetric dicyclopentadieneone, a potential new ligand for transition metal complexes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF Acad, Dept Chem, Colorado Springs, CO 80840 USA. EM Gary.Balaich@usafa.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 428-CHED BP U387 EP U387 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917801735 ER PT J AU Patnaik, SS Day, PN Pachter, R AF Patnaik, SS Day, PN Pachter, R TI Conformational aspects of fluorophore protonation in the green fluorescent protein : A molecular dynamics study SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF, Res Lab, AFRL, MLPJ, Dayton, OH 45431 USA. EM soumya.patnaik@wpafb.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 262 BP U773 EP U773 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917803591 ER PT J AU Pyati, R Sanchez, CP Scott, AM Cooper, TM Rogers, JE Glass, DJ McLean, DG Whalen, TL AF Pyati, R Sanchez, CP Scott, AM Cooper, TM Rogers, JE Glass, DJ McLean, DG Whalen, TL TI Understanding mechanistic pathways through oxidative degradation and photodegradation of a platinum complex. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 Univ Colorado, Dept Chem, Colorado Springs, CO 80933 USA. USAF, MLPJ, Res Lab, Wright Patterson AFB, OH 45433 USA. Sci Applicat Int Corp, Mclean, VA 22102 USA. EM rpyati@uccs.edu; chemhazd@msn.com NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 916-INOR BP U168 EP U168 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918000910 ER PT J AU Qian, XM Zhang, T Chiu, YH Levandier, DJ Miller, JS Dressler, R Ng, C AF Qian, XM Zhang, T Chiu, YH Levandier, DJ Miller, JS Dressler, R Ng, C TI State-selected ion-molecule reaction studies using the synchrotron-bsed pulsed-field-ionization method. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 Univ Calif Davis, Dept Chem, Davis, CA 95616 USA. Boston Coll, Inst Sci Res, Chestnut Hill, MA 02167 USA. Naval Surface Warfare Ctr, Dynam & Diagnost Div, Bethesda, MD USA. USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. EM XMqian@lbl.gov; rainer.dressler@hanscom.af.mil NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 493-PHYS BP U522 EP U522 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918002664 ER PT J AU Qin, HH Mather, PT Baek, JB Tan, LS AF Qin, HH Mather, PT Baek, JB Tan, LS TI Modification of Bisphenol-A BMI resin (BPA-BMI) with allyl-terminated hyperbranched polyimide (AT-PAEKI). SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 Univ Connecticut, Chem Engn & Polymer Program, Storrs, CT 06269 USA. Univ Dayton, Res Inst, AFRL, MLBP,UDRI, Dayton, OH 45469 USA. Air Force Res Lab, Polymer Branch, MLBP, Washington, DC USA. EM qinhaihu@ims.uconn.edu NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 86-POLY BP U544 EP U545 PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918002783 ER PT J AU Roth, EP O'Keefe, KB Fernandez, JZ Graziano, GM Johnson, JEB Balaich, GJ Heimer, NE AF Roth, EP O'Keefe, KB Fernandez, JZ Graziano, GM Johnson, JEB Balaich, GJ Heimer, NE TI New C2-symmetric ansa-calcocene complexes derived from reductive coupling of 1,3,6-tri(tert-butyl)fulvene. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 USAF Acad, Dept Chem, Colorado Springs, CO 80840 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 526-INOR BP U91 EP U91 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918000523 ER PT J AU Schwertner, HA Valtier, S Edwards, ML Kong, SB AF Schwertner, HA Valtier, S Edwards, ML Kong, SB TI Analysis of 6-gingerol, 6-shogaol, and 6-gingerdiol in ginger rhizome powder and in physiological fluids by HPLC, GC/MS, and LC/MS. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 Wilford Hall USAF Med Ctr, Clin Res, Lackland AFB, TX 78236 USA. Univ Incarnate Word, Dept Chem, San Antonio, TX 78209 USA. EM harvey.schwertner@lackland.af.mil; kong@universe.uiwtx.edu NR 0 TC 0 Z9 0 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA AGFD-047 BP U76 EP U76 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917800260 ER PT J AU Schwertner, HA Olsen, EV Kong, SB AF Schwertner, HA Olsen, EV Kong, SB TI Analysis of modafinil in plasma and urine by high performance liquid chromatography (HPLC). SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 Wilford Hall USAF Med Ctr, Lackland AFB, San Antonio, TX 78236 USA. Univ Incarnate Word, Dept Chem, San Antonio, TX 78209 USA. EM harvey.schwertner@lackland.af.mil; kong@universe.uiwtx.edu NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 292-MEDI BP U226 EP U226 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918001214 ER PT J AU Stone, MO Naik, RR Agarwal, G Sowards, LA Brott, LL Rodriguez, F AF Stone, MO Naik, RR Agarwal, G Sowards, LA Brott, LL Rodriguez, F TI Phage-displayed peptides provide insight to biological interactions with inorganic materials. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF, Res Lab, Biotechnol Grp, Wright Patterson AFB, OH 45433 USA. EM morley.stone@wpafb.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 0026-MTLS BP U62 EP U62 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917800194 ER PT J AU Sun, HL Venkatasubramanian, N Houtz, MD Mark, JE Arnold, FE AF Sun, HL Venkatasubramanian, N Houtz, MD Mark, JE Arnold, FE TI Microcellular foams from aminated polysulfone/polybenzimidazole molecular composites. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 Univ Cincinnati, Dept Chem, Cincinnati, OH 45221 USA. Univ Dayton, Res Inst, Dayton, OH 45469 USA. AF Res Lab, Polymer Branch, Hanscom AFB, MA USA. EM sunhl@email.uc.edu NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 115-POLY BP U548 EP U549 PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918002812 ER PT J AU Thompson, DM Akin, JJ Golden, MC AF Thompson, DM Akin, JJ Golden, MC TI Probing the genome of photosynthetic algae and dinoflagellates for the reverse hydrogenase gene SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF Acad, Dept Chem, Colorado Springs, CO 80840 USA. EM david.thompson@usafa.af.mil; james.akin@usafa.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 137-CHED BP U344 EP U344 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917801444 ER PT J AU Thorpe, SW Denaro, TR Tammy, LKC Golden, MC AF Thorpe, SW Denaro, TR Tammy, LKC Golden, MC TI Synthesis and stability of 5-diazoacetyl-2 '-deoxyuridine-5 '-triphosphate for use in thermoselex SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF Acad, Dept Chem, Colorado Springs, CO 80840 USA. EM steven.thorpe@usafa.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 138-CHED BP U344 EP U344 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917801445 ER PT J AU Tomczak, SJ Hogen-Esch, TE AF Tomczak, SJ Hogen-Esch, TE TI Fluorescence studies of hydrophobic association of fluorocarbon-modified poly(N,N-dimethylacrylamide). SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 AF Res Lab, Polymer Working Grp, ERC, Edwards AFB, CA 93524 USA. Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA. EM sandra.tomczak@edwards.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 144-POLY BP U553 EP U553 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918002841 ER PT J AU Trohalaki, S Pachter, R Geiss, KT Frazier, JM AF Trohalaki, S Pachter, R Geiss, KT Frazier, JM TI Predictive toxicology using quantum QSAR descriptors from intermediates. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. USAF, Res Lab, Human Effectiveness Directorate, Wright Patterson AFB, OH 45433 USA. EM steven.trohalaki@wpafb.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 137-COMP BP U753 EP U753 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917803468 ER PT J AU Viers, B Blanski, RL Haddad, TS Mabry, JM AF Viers, B Blanski, RL Haddad, TS Mabry, JM TI Polyhedral oligomeric silsesquioxanes (POSS) from a physical point of view: POSS is not just a small sphere. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 USAF, ERC Inc, PRSM, Res Lab, Edwards AFB, CA 93524 USA. EM brent.viers@ple.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 704-INOR BP U134 EP U134 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918000698 ER PT J AU Viers, BD Haddad, TS Bowers, MT AF Viers, BD Haddad, TS Bowers, MT TI Reanalysis of polyhedral oligomeric silsesouioxane ions and salts. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 PRSM, Air Force Res Lab, Edwards AFB, CA 93524 USA. UC Santa Barbara, ERC, Santa Barbara, CA USA. UC Santa Barbara, USAF, Res Lab, Santa Barbara, CA USA. EM Brent.Viers@edwards.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 0014-MTLS BP U60 EP U60 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917800182 ER PT J AU Vij, A Christe, K Pavlovich, JG Vij, V Corley, RC Wilson, WW AF Vij, A Christe, K Pavlovich, JG Vij, V Corley, RC Wilson, WW TI Matchmaking in polynitrogen chemistry: Pentazolate anion as a prospective candidate for the combination with N5+. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 ERC Inc, USAF, Res Lab, HEDM Synth Grp, Edwards AFB, CA 93524 USA. Univ So Calif, Los Angeles, CA USA. EM ashwani.vij@edwards.af.mil RI Vij, Ashwani/A-2836-2012; Christe, Karl/O-4885-2014 OI Vij, Ashwani/0000-0003-1144-4080; Christe, Karl/0000-0003-0661-5519 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 451-INOR BP U79 EP U79 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918000448 ER PT J AU Vij, V Vij, A Christe, KO Wilson, W Tham, FS Corley, RC AF Vij, V Vij, A Christe, KO Wilson, W Tham, FS Corley, RC TI Aryl- and fluorodiazonium salts: Key starting materials in polynitrogen chemistry SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 USAF, Res Lab, ERC Inc, HEDM Synth Grp, Edwards AFB, CA 93524 USA. Univ So Calif, Los Angeles, CA USA. Univ Calif Riverside, Riverside, CA 92521 USA. EM vandana.vij@edwards.af.mil RI Vij, Ashwani/A-2836-2012; Christe, Karl/O-4885-2014 OI Vij, Ashwani/0000-0003-1144-4080; Christe, Karl/0000-0003-0661-5519 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 450-INOR BP U79 EP U79 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918000447 ER PT J AU Williams, S Miller, TM Midey, A Viggiano, AA AF Williams, S Miller, TM Midey, A Viggiano, AA TI Thermochemistry of hydrocarbon ions, CNHM+ (N=3-9), in the gas phase. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. EM skip.williams@hanscom.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 283-PHYS BP U475 EP U475 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918002458 ER PT J AU Wilson, WW Christe, KO Willner, H Boatz, JA Vij, A Vij, V AF Wilson, WW Christe, KO Willner, H Boatz, JA Vij, A Vij, V TI Reactions of HN3 with nitrogen fluoride cations and metathetical reactions as general methods for the preparation of polynitrogen salts. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LOUISIANA SP Amer Chem Soc C1 USAF, Res Lab, ERC AFRL, Edwards AFB, CA 93524 USA. Univ Duisburg, Fachbereich 6, Duisburg, Germany. USAF, Res Lab, Space & Missle Propuls Div, Edwards AFB, CA USA. EM william.wilson@edwards.af.mil RI Vij, Ashwani/A-2836-2012; Christe, Karl/O-4885-2014 OI Vij, Ashwani/0000-0003-1144-4080; Christe, Karl/0000-0003-0661-5519 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 449-INOR BP U79 EP U79 PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PW UT WOS:000187918000446 ER PT J AU Wyatt, SE Henley, MV Sorensen, L Renard, J AF Wyatt, SE Henley, MV Sorensen, L Renard, J TI Experimental uptake of dense NH3 plumes into surface waters. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 Appl Res Associates, Gulf Coast Div, Tyndall AFB, FL 32403 USA. USAF, Res Lab, Air Expeditionary Forces Technol Div, MLQL, Washington, DC USA. EM Sheryl.Wyatt@tyndall.af.mil NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 150-ENVR BP U821 EP U821 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917803861 ER PT J AU Yeates, AT Dudis, DS AF Yeates, AT Dudis, DS TI Raman responses of cis- and trans-polyenes SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract CT 225th National Meeting of the American-Chemical-Society CY MAR 23-27, 2003 CL NEW ORLEANS, LA SP Amer Chem Soc C1 USAF, Res Lab, Polymer Branch, AFRL,MLBP, Wright Patterson AFB, OH 45433 USA. USAF, Res Lab, Polymer Grp, Wright Patterson AFB, OH 45433 USA. EM yeatesat@ml.mpafb.af.mil NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR PY 2003 VL 225 MA 353 BP U786 EP U786 PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA 761PU UT WOS:000187917803680 ER PT J AU Beall, DP Williamson, EE Ly, JQ Adkins, MC Emery, RL Jones, TP Rowland, CM AF Beall, DP Williamson, EE Ly, JQ Adkins, MC Emery, RL Jones, TP Rowland, CM TI Association of biceps tendon tears with rotator cuff abnormalities: Degree of correlation with tears of the anterior and superior portions of the rotator cuff SO AMERICAN JOURNAL OF ROENTGENOLOGY LA English DT Article ID LONG HEAD; SUBSCAPULARIS TENDON; MR ARTHROGRAPHY; SHOULDER; ARTHROSCOPY; DISLOCATION; DIAGNOSIS; LESIONS; SURGERY; BRACHII AB OBJECTIVE. This study was performed to examine the relationship and association of abnormalities seen in the long head of the biceps brachii tendon to abnormal findings in the rotator cuff. MATERIALS AND METHODS. One hundred eleven patients underwent MR imaging for shoulder pain followed by arthroscopic or open shoulder surgery from January 1997 to December 2000. Patients were identified by a retrospective search, and all consecutive patients having undergone both MR imaging and surgery were included in the patient cohort. Official MR imaging interpretations were compared with operative reports, and all findings were recorded. RESULTS. Twenty-three patients were identified with partial- or full-thickness tears of the long head of the biceps tendon. The sensitivity, specificity, and accuracy of unenhanced MR imaging of the shoulder for detecting these bicipital tears were 52%, 86%, and 79%, respectively. When a tear was present in the biceps tendon, the prevalence of supraspinatous, infraspinatus, and subscapularis tendon tears was 96.2%, 34.6%, and 47.1%, respectively. Patients with biceps tendon tears were significantly more likely to also have subscapularis tendon tears (p < 0.0001) and supraspinatous tendon tears (p < 0.008) than those patients who did not have biceps tendon tears. No significant relationship was found between the presence or absence of a biceps tendon tear and the presence or absence of a infraspinatus or teres minor tendon tear (p = 0.17). CONCLUSION. Tears of the long head of the biceps tendon have a statistically significant association with tears of the anterior and superior rotator cuff and are highly correlated with tears of the supraspinatous and subscapularis tendons. When tears of these tendons are detected, specific attention directed toward the long biceps tendon is warranted to characterize the status of this structure that provides additional stability to the shoulder joint. C1 Uniformed Serv Univ Hlth Sci, Dept Radiol & Nucl Med, Bethesda, MD 20814 USA. Mayo Clin & Mayo Fdn, Dept Radiol, Rochester, MN 55905 USA. Wilford Hall USAF Med Ctr, Dept Radiol, Lackland AFB, TX 78236 USA. Mayo Clin & Mayo Fdn, Biostat Sect, Rochester, MN 55905 USA. RP Beall, DP (reprint author), 3711 Med Dr,611, San Antonio, TX 78229 USA. NR 18 TC 47 Z9 51 U1 0 U2 2 PU AMER ROENTGEN RAY SOC PI RESTON PA 1891 PRESTON WHITE DR, SUBSCRIPTION FULFILLMENT, RESTON, VA 22091 USA SN 0361-803X J9 AM J ROENTGENOL JI Am. J. Roentgenol. PD MAR PY 2003 VL 180 IS 3 BP 633 EP 639 PG 7 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 648LT UT WOS:000181153400010 PM 12591665 ER PT J AU Barker, JR AF Barker, JR TI The real world of employee ownership SO AMERICAN JOURNAL OF SOCIOLOGY LA English DT Book Review C1 USAF Acad, Colorado Springs, CO 80840 USA. RP Barker, JR (reprint author), USAF Acad, Colorado Springs, CO 80840 USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0002-9602 J9 AM J SOCIOL JI Am. J. Sociol. PD MAR PY 2003 VL 108 IS 5 BP 1122 EP 1123 DI 10.1086/379567 PG 2 WC Sociology SC Sociology GA 718EZ UT WOS:000185133300009 ER PT J AU Hrabak, TM Dice, JP AF Hrabak, TM Dice, JP TI Use of immunotherapy in the management of presumed anaphylaxis to the deer fly SO ANNALS OF ALLERGY ASTHMA & IMMUNOLOGY LA English DT Article ID IMPORTED FIRE ANT; WHOLE-BODY EXTRACTS; HYMENOPTERA; ALLERGENS; DIPTERA AB Background: Anaphylactic reactions to biting insects are generally thought to be rare events. Diagnostic and therapeutic standards for these events are not well documented in the literature. Objective: We describe a case report of a patient with multiple suspected immunoglobulin (Ig)E-mediated anaphylactic reactions to biting insects, specifically deer flies (Chrysops sp.), as well as a successful response to immunotherapy. Methods: Prick and intradermal testing with deer fly whole-body extract and measurement of specific IgE were performed to help determine the extent of the patient's hypersensitivity. Immunotherapy was subsequently administered with whole-body deer fly extract. Results: Skin testing was unable to differentiate between the patient and normal controls. In vitro testing was positive in the study patient but only at a low level. After initiating immunotherapy, the patient had repeated exposures to deer fly bites but failed to develop symptoms consistent with his previous anaphylactic episodes. Followup testing on the patient revealed no significant change in the level of skin reactivity or specific IgE. Conclusions: Anaphylaxis consistent with an IgE-mediated mechanism to Chrysops sp. is a real phenomenon and is amenable to immunotherapy for the prevention of life-threatening sequela after exposure. Skin testing using whole-body extract appears to be unreliable. In vitro testing was better able to discern a true sensitivity, although the difference between patient and controls was small. C1 USAF, Med Ctr, Dept Internal Med, Keesler AFB, MS 39534 USA. USAF, Med Ctr, Dept Allergy & Immunol, Keesler AFB, MS 39534 USA. RP Hrabak, TM (reprint author), 81 MDG-SGOM,301 Fisher St, Keesler AFB, MS 39534 USA. EM todd.hrabak@keesler.af.mil NR 11 TC 5 Z9 7 U1 0 U2 1 PU AMER COLL ALLERGY ASTHMA IMMUNOLOGY PI ARLINGTON HTS PA 85 WEST ALGONQUIN RD SUITE 550, ARLINGTON HTS, IL 60005 USA SN 1081-1206 J9 ANN ALLERG ASTHMA IM JI Ann. Allergy Asthma Immunol. PD MAR PY 2003 VL 90 IS 3 BP 351 EP 354 PG 4 WC Allergy; Immunology SC Allergy; Immunology GA 658BZ UT WOS:000181702900015 PM 12669901 ER PT J AU Bhushan, B Trott, S Spain, JC Halasz, A Paquet, L Hawari, M AF Bhushan, B Trott, S Spain, JC Halasz, A Paquet, L Hawari, M TI Biotransformation of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) by a rabbit liver cytochrome p450: insight into the mechanism of RDX biodegradation by Rhodococcus sp strain DN22 SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID ANAEROBIC SLUDGE; DEGRADATION; METABOLITES; SOIL AB A unique metabolite with a molecular mass of 119 Da (C(2)H(5)N(3)O(3)) accumulated during biotransformation of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) by Rhodococcus sp. strain DN22 (D. Fournier, A. Halasz, J. C. Spain, P. Fiurasek, and J. Hawari, Appl. Environ. Microbiol. 68:166-172, 2002). The structure of the molecule and the reactions that led to its synthesis were not known. In the present study, we produced and purified the unknown metabolite by biotransformation of RDX with Rhodococcus sp. strain DN22 and identified the molecule as 4-nitro-2,4-diazabutanal using nuclear magnetic resonance and elemental analyses. Furthermore, we tested the hypothesis that a cytochrome P450 enzyme was responsible for RDX biotransformation by strain DN22. A cytochrome P450 2134 from rabbit liver catalyzed a very similar biotransformation of RDX to 4-nitro-2,4-diazabutanal. Both the cytochrome P450 2B4 and intact cells of Rhodococcus sp. strain DN22 catalyzed the release of two nitrite ions from each reacted RDX molecule. A comparative study of cytochrome P450 2114 and Rhodococcus sp. strain DN22 revealed substantial similarities in the product distribution and inhibition by cytochrome P450 inhibitors. The experimental evidence led us to propose that cytochrome P450 2B4 can catalyze two single electron transfers to RDX, thereby causing double denitration, which leads to spontaneous hydrolytic ring cleavage and decomposition to produce 4-nitro-2,4-diazabutanal. Our results provide strong evidence that a cytochrome P450 enzyme is the key enzyme responsible for RDX biotransformation by Rhodococcus sp. strain DN22. C1 Natl Res Council Canada, Biotechnol Res Inst, Montreal, PQ H4P 2R2, Canada. USAF, Res Lab, Tyndall AFB, FL 32403 USA. RP Hawari, M (reprint author), Natl Res Council Canada, Biotechnol Res Inst, 6100 Royalmount Ave, Montreal, PQ H4P 2R2, Canada. EM jalal.hawari@nrc.ca NR 21 TC 70 Z9 74 U1 0 U2 11 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0099-2240 J9 APPL ENVIRON MICROB JI Appl. Environ. Microbiol. PD MAR PY 2003 VL 69 IS 3 BP 1347 EP 1351 DI 10.1128/AEM.69.3.1347-1351.2003 PG 5 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 653LA UT WOS:000181435600002 PM 12620815 ER PT J AU Trott, S Nishino, SF Hawari, J Spain, JC AF Trott, S Nishino, SF Hawari, J Spain, JC TI Biodegradation of the nitramine explosive CL-20 SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID MUNICIPAL ANAEROBIC SLUDGE; HEXAHYDRO-1,3,5-TRINITRO-1,3,5-TRIAZINE RDX; AGROBACTERIUM-RADIOBACTER; GLYCEROL TRINITRATE; CONTAMINATED SOIL; STRAIN DN22; OCTAHYDRO-1,3,5,7-TETRANITRO-1,3,5,7-TETRAZOCINE; BIOAVAILABILITY; BIOREMEDIATION; DEGRADATION AB The cyclic nitramine explosive CL-20 (2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane) was examined in soil microcosms to determine whether it is biodegradable. CL-20 was incubated with a variety of soils. The explosive disappeared in all microcosms except the controls in which microbial activity had been inhibited. CL-20 was degraded most rapidly in garden soil. After 2 days of incubation, about 80% of the initial CL-20 had disappeared. A CL-20-degrading bacterial strain, Agrobacterium sp. strain JS71, was isolated from enrichment cultures containing garden soil as an inoculum, succinate as a carbon source, and CL-20 as a nitrogen source. Growth experiments revealed that strain JS71 used 3 mol of nitrogen per mol of CL-20. C1 USAF, Res Lab, MLQL, Tyndall AFB, FL 32403 USA. Natl Res Council Canada, Biotechnol Res Inst, Montreal, PQ H4P 2R2, Canada. RP Spain, JC (reprint author), USAF, Res Lab, MLQL, Bldg 1117,139 Barnes Dr, Tyndall AFB, FL 32403 USA. NR 30 TC 23 Z9 26 U1 1 U2 4 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0099-2240 J9 APPL ENVIRON MICROB JI Appl. Environ. Microbiol. PD MAR PY 2003 VL 69 IS 3 BP 1871 EP 1874 DI 10.1128/AEM.69.3.1871-1874.2003 PG 4 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 653LA UT WOS:000181435600073 PM 12620886 ER PT J AU Mastroianni, GR Chuba, DM Zupan, MO AF Mastroianni, GR Chuba, DM Zupan, MO TI Self-pacing and cognitive performance while walking SO APPLIED ERGONOMICS LA English DT Article ID TIME TRIAL PERFORMANCE; PHYSICAL EXERCISE; EXERTION; TESTS; MEN AB Ten hikers completed a 4 km hike on hilly terrain three times: once self- paced without load. on cc self-paced with h a backpack load of 10%. bode weight. and once externally paced with a backpack load of 10% body weight, Subjects performed mental arithmetic tasks and provided ratings of perceived exertion while chalking. No differences in speed or accuracy of performance of mental arithmetic problems ere observed. A battery of cognitive and physical tests was performed prior to walking and after each of the three chalks. Significant differences baselines post-walk baselines and post-walk tests were found only For the pattern-matching task. Subjects altered their pace in response to the addition of the backpack load, and altered their speed on downhill terrain in respon,,e to external pacing, Ratings of perceived exertion were found to correlate relatively well (r = 0.80) with heart rate, but consistently underestimated actual heart rate. underestimated % as much greater for downhill than for uphill terrain. Underestimation of heart rate by rating of perceived exertion as least when subjects carried an external load of 10%. body weight. Published by Elsevier Science Ltd. C1 USAF Acad, HQ USAFA, DFBL, Colorado Springs, CO 80840 USA. RP Mastroianni, GR (reprint author), USAF Acad, HQ USAFA, DFBL, 2354 Fairchild Dr,Suite 5l52, Colorado Springs, CO 80840 USA. NR 29 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0003-6870 J9 APPL ERGON JI Appl. Ergon. PD MAR PY 2003 VL 34 IS 2 BP 131 EP 139 DI 10.1016/S0003-6870(03)00008-5 PG 9 WC Engineering, Industrial; Ergonomics; Psychology, Applied SC Engineering; Psychology GA 663VD UT WOS:000182026200005 PM 12628570 ER PT J AU Stanczak, DE Triplett, G AF Stanczak, DE Triplett, G TI Psychometric properties of the Mid-Range Expanded Trail Making Test - An examination of learning-disabled and non-learning-disabled children SO ARCHIVES OF CLINICAL NEUROPSYCHOLOGY LA English DT Article DE neuropsychological assessment; learning disabilities expanded trail making test AB By systematically varying the stimuli within the Mid-Range Trail Making Test (MTMT), it may eventually be possible to isolate the cognitive demands of this test. Toward this end, the Mid-Range Expanded TMT (METMT) was developed by adding five new forms to the original forms A and B. To insure its appropriateness for clinical and experimental use, the current study sought to quantify the psychometric properties of this new test. The results indicate that the METMT is reliable and has adequate construct, criterion, and factoral validity. The results also cross-validated the findings of Davis et al. [J. Clin. Psychol. 45 (1989) 423.], suggesting that brief neuropsychological evaluations can effectively differentiate normal learners from learning-disabled children. The present study suggests that the MTMT is robust to alterations of its stimulus dimensions. Preliminary METMT normative data are presented. (C) 2001 National Academy of Neuropsychology. Published by Elsevier Science Ltd. All rights reserved. C1 Wilford Hall USAF Med Ctr, Psychol Res Serv, Med Wing 59, MMCPR, Lackland AFB, TX 78236 USA. Counseling Associates Cent Florida, Lakeland, FL USA. RP Stanczak, DE (reprint author), Wilford Hall USAF Med Ctr, Psychol Res Serv, Med Wing 59, MMCPR, 2200 Bergquist Dr,Suite 1, Lackland AFB, TX 78236 USA. NR 17 TC 0 Z9 1 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0887-6177 J9 ARCH CLIN NEUROPSYCH JI Arch. Clin. Neuropsychol. PD MAR PY 2003 VL 18 IS 2 BP 107 EP 120 AR PII S0887-6177(01)00190-1 PG 14 WC Psychology, Clinical; Psychology SC Psychology GA 648LC UT WOS:000181152000001 PM 14591463 ER PT J AU Segal, HG Wood, GA DeMeis, DK Smith, HL AF Segal, HG Wood, GA DeMeis, DK Smith, HL TI Future events, early experience, and mental health - Clinical assessment using the anticipated life history measure SO ASSESSMENT LA English DT Article DE narrative assessment; social cognition; projective; early memories ID PICTURE ARRANGEMENT SUBTEST; SOCIAL COGNITION; OBJECT RELATIONS; SEXUAL ABUSE; STORIES TOLD; WAIS-R; RORSCHACH; SELF; PERSONALITY; IMPULSIVITY AB This study's goals were (a) to provide convergent validity for the Anticipated Life History measure (ALH), an instrument prompting participants to describe their future life course from their 21st birthday until their death, and(b) to assess the impact of early experience and early memories on the ALH. The ALH narratives were coded for the presence and/or absence of future life events and for five clinical features (Narrative Integrity, Depression, Fantasy Distortion, Impulsivity, and Malevolence) using a detailed scoring manual. A sample of 285 young adults completed the ALH and a battery of cognitive, mood, and life events measures. The results confirm the utility of this new instrument: Participants whose ALH scored high on the clinical measures also had higher levels of current depression, lower quality-of-life satisfaction, reported more negative early life experiences, and recounted negative early memories. C1 Cornell Univ, Dept Psychol, Ithaca, NY 14853 USA. Widener Univ, Chester, PA 19013 USA. Hobart & William Smith Coll, Geneva, NY USA. USAF Acad, Colorado Springs, CO 80840 USA. RP Segal, HG (reprint author), Cornell Univ, Dept Psychol, Uris Hall, Ithaca, NY 14853 USA. FU NIMH NIH HHS [1 R03 MH55498] NR 53 TC 0 Z9 0 U1 1 U2 3 PU SAGE PUBLICATIONS INC PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA SN 1073-1911 J9 ASSESSMENT JI Assessment PD MAR PY 2003 VL 10 IS 1 BP 29 EP 40 DI 10.1177/1073191102250186 PG 12 WC Psychology, Clinical SC Psychology GA 663VX UT WOS:000182028000003 PM 12675381 ER PT J AU Katta, VR Meyer, TR Gord, JR Roquemore, WM AF Katta, VR Meyer, TR Gord, JR Roquemore, WM TI Insights into non-adiabatic-equilibrium flame temperatures during millimeter-size vortex/flame interactions SO COMBUSTION AND FLAME LA English DT Article DE diffusion flames; vortex/flame interactions; non-adiabatic temperature; preferential diffusion; turbulence ID DIFFUSION FLAMES; HYDROGEN AB Previous experimental and numerical studies have demonstrated that local flame temperatures can significantly increase above or decrease below the adiabatic-equilibrium flame temperature during millimeter-size vortex/flame interactions. Such large excursions in temperature are not observed in centimeter-size vortex/flame interactions. To identify the physical mechanisms responsible for these super- or sub-adiabatic-equilibrium flame temperatures, numerical studies have been conducted for millimeter-size vortex/flame interactions in a hydrogen-air, opposing-jet diffusion flame. Contrary to expectations, preferential diffusion between H-2 and O-2 and geometrical curvature are not responsible for these variations in local flame temperature. This was demonstrated through simulations made by forcing the diffusion coefficients of H-2 and O-2 to be equal and thereby eliminating preferential diffusion. Propagation of flame into small (similar to1 mm) vortices suggested that the amount of reactant carried by such a small vortex is not sufficient to feed the flame with fresh reactant during the entire vortex/flame interaction process. Various numerical experiments showed that the. reactant-limiting characteristics associated with the millimeter-size vortices and the local Lewis number (not preferential diffusion) are responsible for the generation of flame temperature that is different from the adiabatic-equilibrium value. The reactant-deficient nature of the millimeter-size vortices forces the combustion products to be entrained into the vortex. While a greater-than-unity Lewis number results in pre-heating of the reactant through the product entrainment, a less-than-unity Lewis number causes cooling of the reactant. Contrary to this behavior, a centimeter-size large vortex wraps and maintains the flame around its outer perimeter by feeding the flame with fresh reactant throughout the interaction process, thereby rendering the flame unaffected by the Lewis number. Since turbulent flames generally involve. interactions with small-size vortices, the physical mechanisms described here should be considered when developing mathematical models for turbulent flames. (C) 2003 The Combustion Institute. All rights reserved. C1 Innovat Sci Solut Inc, Dayton, OH 45440 USA. USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA. RP Katta, VR (reprint author), Innovat Sci Solut Inc, 2766 Indian Ripple Rd, Dayton, OH 45440 USA. RI Meyer, Terrence/F-1556-2011 NR 23 TC 13 Z9 13 U1 1 U2 5 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD MAR PY 2003 VL 132 IS 4 BP 639 EP 651 DI 10.1016/S0010-2180(02)0517-5 PG 13 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA 671FL UT WOS:000182454600004 ER PT J AU Hosur, MV Adya, M Vaidya, UK Mayer, A Jeelani, S AF Hosur, MV Adya, M Vaidya, UK Mayer, A Jeelani, S TI Effect of stitching and weave architecture on the high strain rate compression response of affordable woven carbon/epoxy composites SO COMPOSITE STRUCTURES LA English DT Article DE vacuum assisted resin infusion molding; Hopkinson pressure bar; high strain rate loading; woven composites; stitching ID FIBER-REINFORCED COMPOSITES; BEHAVIOR; RESISTANCE AB In this Study, experimental investigations on stitched and unstitched woven carbon/epoxy laminates under high strain rate compression loading are discussed. Stitched/unstitched laminates are fabricated with aerospace grade plain and satin weave fabrics with room temperature curing SC-15 epoxy resin using affordable vacuum assisted resin infusion molding process. The samples are subjected to high strain rate loading using modified compression split Hopkinson's pressure bar at three different strain rates ranging from 320 to 1149 s(-1). Results are discussed in terms of unstitched/stitched configuration, fabric type and loading directions. Dynamic compression properties are compared with those of static loading. Failure mechanisms Lire characterized through optical and scanning microscopy. Published by Elsevier Science Ltd. C1 Tuskegee Univ, Ctr Adv Mat, Tuskegee, AL 36088 USA. Univ Alabama Birmingham, Dept Mat Sci & Engn, Birmingham, AL 35294 USA. USAF, Res Lab, VASD, Struct Design & Dev Branch, Wright Patterson AFB, OH 45433 USA. RP Hosur, MV (reprint author), Tuskegee Univ, Ctr Adv Mat, Tuskegee, AL 36088 USA. EM hosur@tusk.edu NR 25 TC 37 Z9 39 U1 1 U2 14 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0263-8223 EI 1879-1085 J9 COMPOS STRUCT JI Compos. Struct. PD MAR PY 2003 VL 59 IS 4 BP 507 EP 523 AR PII S0263-8223(02)00247-7 DI 10.1016/S0263-8223(02)00247-7 PG 17 WC Materials Science, Composites SC Materials Science GA 649KD UT WOS:000181206400010 ER PT J AU Phillips, CA Repperger, DW AF Phillips, CA Repperger, DW TI Physiological state model for human ergonomic workload SO COMPUTERS IN BIOLOGY AND MEDICINE LA English DT Article DE human workload; physiological state; multiple regression; mathematical model; ergonomic engineering ID SKELETAL-MUSCLE; CONTRACTION; ACTIVATION; VELOCITY AB Twenty ergonomic tasks were evaluated in which human operators performed mixed static work and dynamic work. Steady-state physiological data are the input into a model as regressor variables, which are then multiplied by the respective regressor coefficients. The resultant physiological state model output is a single response variable that represents the workload. Mixed stepping regression techniques were utilized to calculate the regressor coefficients. Ten physiological state model equations resulted. A lower order equation (with three regressor variables) accounted for 80% of the observed variance. The highest order equation (with ten regressor variables) accounted for 89% of the variance. (C) 2002 Elsevier Science Ltd. All rights reserved. C1 Wright State Univ, Dept Biomed Ind & Human Factors Engn, Dayton, OH 45435 USA. USAF, Res Lab, HECP, Wright Patterson AFB, OH 45433 USA. RP Phillips, CA (reprint author), Wright State Univ, Dept Biomed Ind & Human Factors Engn, Dayton, OH 45435 USA. NR 14 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0010-4825 J9 COMPUT BIOL MED JI Comput. Biol. Med. PD MAR PY 2003 VL 33 IS 2 BP 143 EP 167 DI 10.1016/S0010-4825(02)00064-1 PG 25 WC Biology; Computer Science, Interdisciplinary Applications; Engineering, Biomedical; Mathematical & Computational Biology SC Life Sciences & Biomedicine - Other Topics; Computer Science; Engineering; Mathematical & Computational Biology GA 652PE UT WOS:000181386900003 PM 12565728 ER PT J AU Goodman, RL Johnson, DA Dillon, H Edelhauser, HF Waller, SG AF Goodman, RL Johnson, DA Dillon, H Edelhauser, HF Waller, SG TI Laser in situ keratomileusis flap stability during simulated aircraft ejection in a rabbit model SO CORNEA LA English DT Article DE laser in situ keratomileusis; stability; trauma; animal model ID PHOTOREFRACTIVE KERATECTOMY; HIGH-ALTITUDE; REFRACTIVE CHANGES; RADIAL KERATOTOMY; DISLOCATION; SURGERY; LASIK; COMPLICATIONS; MYOPIA AB Purpose. To determine the stability of the laser in situ keratomileusis (LASIK) flap in a rabbit model when subjected to vertical acceleration at nine times the force of gravity (+9 Gz) in an aircraft cockpit ejection simulator. Methods. Thirty-six eyes from 25 New Zealand white rabbits underwent LASIK flap creation without laser photoablation. One month after surgery, the rabbits were sedated and harnessed in a cockpit ejection seat simulator used to train United States Air Force pilots. They then underwent a controlled rapid-sequence ejection at +9 Gz. Subsequently, the rabbits were euthanized and the corneas harvested for microscopic examination. Refractive measurements and corneal examination were made before LASIK flap creation and prior to and after the +9 Gz ejections. Determination of LASIK flap dislocation was based on clinical observation of flap slippage or a significant shift in pre-ejection to postejection cylinder axis. Results. The average pre-operative refraction of the rabbit eye was +1.83 D + 3.25 D x 086 degrees. The average change from pre-ejection to postejection was 0.04 D sphere, 0.02 D cylinder, 6.8 axis degrees, and 0.04 D spherical equivalent. The pre-ejection to postejection measurements were not statistically significantly different by a paired t test. Laser in situ keratomileusis flap dislocation or ejection-induced corneal folds or striae were not clinically observed. Histologic examination revealed well-healed LASIK flaps but no reactive keratocytes at the central stromal-stromal interface. Conclusions. Healed LASIK flaps as created in this rabbit model without laser ablation are stable when subjected to a rapid vertical ejection at nine times the force of gravity. C1 Mike OCallaghan Fed Hosp, Ophthalmol Serv, Las Vegas, NV USA. Wilford Hall USAF Med Ctr, Cornea Serv, San Antonio, TX 78236 USA. Wilford Hall USAF Med Ctr, Uveitis Serv, San Antonio, TX 78236 USA. Langley AFB, Langley, VA USA. Emory Eye Ctr, Atlanta, GA USA. USAF, Washington, DC 20330 USA. RP Goodman, RL (reprint author), Mike OCallaghan Fed Hosp, 99 MDG SGOSE, Nellis AFB, NV 89191 USA. NR 32 TC 13 Z9 14 U1 0 U2 3 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0277-3740 J9 CORNEA JI Cornea PD MAR PY 2003 VL 22 IS 2 BP 142 EP 145 DI 10.1097/00003226-200303000-00013 PG 4 WC Ophthalmology SC Ophthalmology GA 651FM UT WOS:000181309900013 PM 12605050 ER PT J AU Daibog, EI Stolpovskii, VG Kahler, SW AF Daibog, EI Stolpovskii, VG Kahler, SW TI Invariance of charged particle time profiles at late stages of SCR events from the data of multisatellite observations SO COSMIC RESEARCH LA English DT Article ID CORONAL MASS EJECTIONS; ENERGETIC PARTICLES; SOLAR; SHOCKS AB Based on the data obtained in simultaneous measurements on the Helios-1 and Helios-2 spacecraft, the properties of the spatial and temporal invariance of spectra of protons with energies more than 4 MeV and electrons with energies more than 0.3 MeV are studied during the phase of intensity decay in events initiated by the following associations: a flare-coronal mass ejection-coronal and interplanetary shock waves. Emphasis is placed on research into the fluxes of electrons, whose possibility to be accelerated by shock waves is problematic. It is shown that the spectra and decay times of both protons and electrons are approximately invariant relative to the flare coordinates in a wide angular range. Depending on the western or eastern spacecraft position in relation to the front part of a shock wave, one observes a delay or advance of the onset of the invariant mode relative to the shock wave arrival, which increases with the growth of the corresponding angular distance. C1 Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119899, Russia. USAF, Res Lab, Hanscom AFB, MA USA. RP Daibog, EI (reprint author), Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119899, Russia. NR 16 TC 3 Z9 3 U1 0 U2 1 PU MAIK NAUKA/INTERPERIODICA PI NEW YORK PA C/O KLUWER ACADEMIC-PLENUM PUBLISHERS, 233 SPRING ST, NEW YORK, NY 10013-1578 USA SN 0010-9525 J9 COSMIC RES+ JI Cosmic Res. PD MAR-APR PY 2003 VL 41 IS 2 BP 128 EP 134 DI 10.1023/A:1023326812489 PG 7 WC Engineering, Aerospace; Astronomy & Astrophysics SC Engineering; Astronomy & Astrophysics GA 671GX UT WOS:000182457900005 ER PT J AU Sutto, TE Trulove, PC De Long, HC AF Sutto, TE Trulove, PC De Long, HC TI Direct X-ray diffraction evidence for imidazolium intercalation into graphite from an ionic liquid SO ELECTROCHEMICAL AND SOLID STATE LETTERS LA English DT Article ID ELECTRODES AB 1,2-dimethyl-3-n-butylimidazolium (DMBI) tetrafluoroborate was electrochemically characterized at a graphitic paper working electrode. Cyclic voltammetry indicated reversible cationic intercalation of the graphitic paper. X-ray powder/thin film diffraction measurements of intercalated graphitic paper gave one primary diffraction peak at 3.44671 Angstrom. In addition, detailed diffraction studies revealed several additional reflections at 0 0 1 positions. The X-ray diffraction results are consistent with a DMBI x 1 C intercalate that has a c axis of 10.34013+/-0.0051 Angstrom and a resulting c axis expansion of 6.98 Angstrom. This result suggests that the plane of the five membered imidazolium ring is lying nearly parallel to the graphite sheets. (C) 2003 The Electrochemical Society. C1 USN Acad, Annapolis, MD 21402 USA. USN, Res Lab, Washington, DC 20375 USA. USAF, Off Sci Res, Arlington, VA 22203 USA. RP Sutto, TE (reprint author), USN Acad, Annapolis, MD 21402 USA. NR 11 TC 13 Z9 13 U1 1 U2 7 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA SN 1099-0062 J9 ELECTROCHEM SOLID ST JI Electrochem. Solid State Lett. PD MAR PY 2003 VL 6 IS 3 BP A50 EP A52 DI 10.1149/1.1543333 PG 3 WC Electrochemistry; Materials Science, Multidisciplinary SC Electrochemistry; Materials Science GA 640VL UT WOS:000180708600002 ER PT J AU Komar, N Langevin, S Hinten, S Nemeth, N Edwards, E Hettler, D Davis, B Bowen, R Bunning, M AF Komar, N Langevin, S Hinten, S Nemeth, N Edwards, E Hettler, D Davis, B Bowen, R Bunning, M TI Experimental infection of north American birds with the New York 1999 strain of West Nile virus SO EMERGING INFECTIOUS DISEASES LA English DT Article ID NORTHEASTERN UNITED-STATES; OUTBREAK; ENCEPHALITIS; SURVEILLANCE; MOSQUITOS; CITY; COMPETENCE; SYSTEM; CULEX AB To evaluate transmission dynamics, we exposed 25 bird species to West Nile virus (WNV) by infectious mosquito bite. We monitored viremia titers, clinical outcome, WNV shedding (cloacal and oral), seroconversion, virus persistence in organs, and susceptibility to oral and contact transmission. Passeriform and charadriiform birds were more reservoir competent (a derivation of viremia data) than other species tested. The five most competent species were passerines: Blue Jay (Cyanocitta cristata), Common Grackle (Quiscalus quiscula), House Finch (Carpodacus mexicanus), American Crow (Corvus brachyrhynchos), and House Sparrow (Passer domesticus). Death occurred in eight species. Cloacal shedding of WNV was observed in 17 of 24 species, and oral shedding in 12 of 14 species. We observed contact transmission among four species and oral in five species. Persistent WNV infections were found in tissues of 16 surviving birds. Our observations shed light on transmission ecology of WNV and will benefit surveillance and control programs. C1 Ctr Dis Control & Prevent, Ft Collins, CO 80522 USA. Colorado State Univ, Ft Collins, CO 80523 USA. USAF, Off Surgeon Gen, Bolling Air Foce Base, Washington, DC 20330 USA. RP Komar, N (reprint author), Ctr Dis Control & Prevent, POB 2087, Ft Collins, CO 80522 USA. RI Owen, Jen/B-3148-2013 OI Owen, Jen/0000-0003-1383-4816 NR 38 TC 617 Z9 643 U1 7 U2 69 PU CENTER DISEASE CONTROL PI ATLANTA PA ATLANTA, GA 30333 USA SN 1080-6040 J9 EMERG INFECT DIS JI Emerg. Infect. Dis PD MAR PY 2003 VL 9 IS 3 BP 311 EP 322 PG 12 WC Immunology; Infectious Diseases SC Immunology; Infectious Diseases GA 654QN UT WOS:000181507700005 PM 12643825 ER PT J AU Muller, TA Werlen, C Spain, J van der Meer, JR AF Muller, TA Werlen, C Spain, J van der Meer, JR TI Evolution of a chlorobenzene degradative pathway among bacteria in a contaminated groundwater mediated by a genomic island in Ralstonia SO ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID PSEUDOMONAS-PUTIDA F1; SP. STRAIN B13; NUCLEOTIDE-SEQUENCE; 2,4-DICHLOROPHENOXYACETIC ACID; TOLUENE DEGRADATION; CLC ELEMENT; GENES; DIOXYGENASE; CLONING; OPERON AB The genetic structure of two Ralstonia spp., strain JS705 and strain JS745, isolated from the same groundwater aquifer, was characterized with respect to the degradation capacities for toluene and chlorobenzene degradation. Cosmid library construction, cloning, DNA sequencing and mating experiments indicated that the genes for chlorobenzene degradation in strain JS705 were a mosaic of the clc genes, previously described for Pseudomonas sp. strain B13, and a 5 kb fragment identical to strain JS745. The 5 kb fragment identical to both JS705 and JS745 was flanked in JS705 by one complete and one incomplete insertion (IS) element. This suggested involvement of the IS element in mobilizing the genes from JS745 to JS705, although insertional activity of the IS element in its present configuration could not be demonstrated. The complete genetic structure for chlorobenzene degradation in strain JS705 resided on a genomic island very similar to the clc element (Ravatn, R., Studer, S., Springael, D., Zehnder, A.J., van der Meer, J.R. 1998. Chromosomal integration, tandem amplification, and deamplification in Pseudomonas putida F1 of a 105-kilobase genetic element containing the chlorocatechol degradative genes from Pseudomonas sp. strain B13. J Bacteriol 180: 4360-4369). The unique reconstruction of formation of a metabolic pathway through the activity of IS elements and a genomic island in the chlorobenzene-degrading strain JS705 demonstrated how pathway evolution can occur under natural conditions in a few 'steps'. C1 Swiss Fed Inst Environm Sci & Technol EAWAG, CH-5600 Dubendorf, Switzerland. USAF, Res Lab, AFRL MLQL, Tyndall AFB, FL 32403 USA. RP van der Meer, JR (reprint author), Swiss Fed Inst Environm Sci & Technol EAWAG, Ueberlandstr 133, CH-5600 Dubendorf, Switzerland. EM vdmeer@eawag.ch RI van der Meer, Jan Roelof/G-6610-2012 NR 43 TC 43 Z9 47 U1 1 U2 9 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 1462-2912 EI 1462-2920 J9 ENVIRON MICROBIOL JI Environ. Microbiol. PD MAR PY 2003 VL 5 IS 3 BP 163 EP 173 DI 10.1046/j.1462-2920.2003.00400.x PG 11 WC Microbiology SC Microbiology GA 646GL UT WOS:000181027200003 PM 12588296 ER PT J AU Roy, AK Camping, JD AF Roy, AK Camping, JD TI Development of a portable shear test fixture for low modulus porous (foam) materials SO EXPERIMENTAL MECHANICS LA English DT Article DE graphitic foam; shear test; open-cell foam; structural foam; porous materials ID OPEN-CELL FOAMS; LOW-DENSITY MATERIALS; ELASTIC PROPERTIES; MECHANICS AB The shear properties of brittle and highly porous carbon (graphitic) foam cannot be measured reliably with most standard test methods, such as single rail, double rail, losipescu shear, etc. A new testing device has been developed to accurately measure the shear stiffness and strength of carbon foam or other porous materials. Specimens of cylindrical cross section are used to reduce the high stress concentration that normally occurs in the vicinity of the grip section. Since strain gages could not be installed on the specimen surface (due to porosity), the shear strain is determined from the specimen end rotation. A high resolution in the rotational measurement is achieved by using a stepper motor with multiple gear reduction. In view of testing low modulus material, the load cell of the fixture was mounted onto an axial roller to relieve the axial constraint while twisting the specimens. The accuracy of the measurement and calibration of the test fixture has been demonstrated by measuring the shear modulus of two plastics (polyvinyl chloride (PVC) and urethane). C1 USAF, Res Lab, Mat & Mfg Directorate, MLBC, Wright Patterson AFB, OH 45433 USA. Univ Dayton, Res Inst, Dayton, OH 45469 USA. RP Roy, AK (reprint author), USAF, Res Lab, Mat & Mfg Directorate, MLBC, Bldg 654,2941 P St,Room 136, Wright Patterson AFB, OH 45433 USA. NR 13 TC 2 Z9 3 U1 0 U2 3 PU SAGE PUBLICATIONS LTD PI LONDON PA 6 BONHILL STREET, LONDON EC2A 4PU, ENGLAND SN 0014-4851 J9 EXP MECH JI Exp. Mech. PD MAR PY 2003 VL 43 IS 1 BP 39 EP 44 PG 6 WC Materials Science, Multidisciplinary; Mechanics; Materials Science, Characterization & Testing SC Materials Science; Mechanics GA 646ZV UT WOS:000181067500005 ER PT J AU Fawaz, SA AF Fawaz, SA TI Equivalent initial flaw size testing and analysis of transport aircraft skin splices SO FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES LA English DT Article DE AFGROW; corner cracks; FASTRAN; fractography; riveted joints; stress intensity factor AB The equivalent initial flaw size (EIFS) concept was developed nearly 30 years ago in an attempt to account for the initial quality, both manufacturing and material properties, of a structural detail prone to fatigue cracking. Widespread use of this concept has been limited due to the large amount of test data required to develop a reliable EIFS distribution. In this effort, an EIFS distribution was determined for four types of flat, production like transport aircraft fuselage skin joints loaded by remote tension. Two crack growth prediction codes, AFGROW and FASTRAN , were used to not only develop the EIFS but also to compare the crack growth algorithms in each code. The EIFS calculations are prone to compounding errors in the crack growth analysis due to the changing stress intensity factor solutions and stress fields as the crack gets longer. Thus, only including EIFS calculations for mechanically small cracks, crack lengths less than 1.27 mm, results in a mean EIFS of 18.0 mum with a standard deviation of 3.78 mum. C1 USAF Acad, HQ, DFEM, Colorado Springs, CO 80840 USA. RP Fawaz, SA (reprint author), USAF Acad, HQ, DFEM, 2354 Fairchild Dr,Suite 6 L-155 USAF Acad, Colorado Springs, CO 80840 USA. NR 25 TC 20 Z9 21 U1 0 U2 5 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 8756-758X J9 FATIGUE FRACT ENG M JI Fatigue Fract. Eng. Mater. Struct. PD MAR PY 2003 VL 26 IS 3 BP 279 EP 290 DI 10.1046/j.1460-2695.2003.00637.x PG 12 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA 646TX UT WOS:000181051600009 ER PT J AU Karpets, MV Milman, YV Barabash, OM Korzhova, NP Senkov, ON Miracle, DB Legkaya, TN Voskoboynik, IV AF Karpets, MV Milman, YV Barabash, OM Korzhova, NP Senkov, ON Miracle, DB Legkaya, TN Voskoboynik, IV TI The influence of Zr alloying on the structure and properties of Al3Ti SO INTERMETALLICS LA English DT Article DE alummides, miscellaneous; ternary alloy systems; crystallography ID SYSTEM TI-AL; PHASES AB The phase stability and transformations in Al-3(Ti1-xZrx) intermetallic alloys (x = 0-1) produced by arc melting were studied in the temperature range of 20 to 1100degreesC by using an in situ X-ray diffraction (XRD) method. Two phases, D0(22) and D0(23), both having ordered tetragonal structures, were present at room temperature at zirconium concentrations from 1 to 10 at.% (x = 0.04-0.4). At higher concentrations of Zr (0.4 < x < 1), only the D0(23) phase was detected. For the alloy with x = 0.32, the D0(23) transformed to D0(22) on heating at temperatures 1100 degreesC and above. On cooling, the D0(22) phase was stable to similar to 650 degreesC, and the D0(23) phase was formed again in the temperature range of 600-650 degreesC. The positional parameters of the D0(23) atomic structure in the alloy Al-3(Ti0.68Zr0.32) were determined using a full-profile XRD analysis. It was shown that zirconium atoms substitute titanium atoms and increase the lattice parameters of the D0(23) structure. Zr fractions as small as x = 0.1 are required to stabilize the D0(23) structure. A low temperature phase modification, Al24Ti8, was also detected in the surface layer in the temperature range below 650degreesC and it was found to be a result of surface grinding. Mechanical properties of the alloys studied are also discussed. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Natl Acad Sci Ukraine, I Frantsevich Inst Problems Mat Sci, UA-03142 Kiev, Ukraine. Natl Acad Sci Ukraine, G Kurdyumov Inst Met Phys, UA-03142 Kiev, Ukraine. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. Universal Energy Syst Inc, Dayton, OH 45432 USA. RP Milman, YV (reprint author), Natl Acad Sci Ukraine, I Frantsevich Inst Problems Mat Sci, 3 Krzhizhanovsky Str, UA-03142 Kiev, Ukraine. RI Senkov, Oleg/C-7197-2012; OI Senkov, Oleg/0000-0001-5587-415X; Milman, Yuly/0000-0003-1889-7373 NR 16 TC 23 Z9 26 U1 0 U2 2 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0966-9795 J9 INTERMETALLICS JI Intermetallics PD MAR PY 2003 VL 11 IS 3 BP 241 EP 249 AR PII S0966-9795(02)00234-0 DI 10.1016/S0966-9795(02)00234-0 PG 9 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA 647WB UT WOS:000181116100007 ER PT J AU Birman, V Byrd, LW AF Birman, V Byrd, LW TI Effect of matrix cracking in cross-ply ceramic matrix composite beams on their mechanical properties and natural frequencies SO INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS LA English DT Article DE ceramic matrix composites; physical nonlinearity; matrix cracks; vibrations AB The present paper illustrates the effect of matrix cracks in longitudinal and transverse layers of cross-ply ceramic matrix composite (CMC) beams on their mechanical properties and vibration frequencies. Even in a geometrically linear problem considered in the paper, the physical non-linearity is introduced by matrix cracks and interfacial fiber-matrix friction in longitudinal layers. A closed-form solution for mechanical properties of a cross-ply CMC beam with matrix cracks is developed in the paper. The frequency of free vibrations of a simply supported beam is derived as a function of the amplitude, accounting for the effect of matrix cracks. As shown in the paper, the prediction of the natural frequencies of cross-ply CMC beams with matrix cracks in both longitudinal and transverse layers is possible using simple, yet accurate, approximate equations. (C) 2002 Elsevier Science Ltd. All rights reserved. C1 Univ Missouri, Engn Educ Ctr, St Louis, MO 63121 USA. USAF, Res Lab, AFRL VASM, Wright Patterson AFB, OH 45433 USA. RP Birman, V (reprint author), Univ Missouri, Engn Educ Ctr, 8001 Nat Bridge Rd, St Louis, MO 63121 USA. NR 11 TC 7 Z9 7 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0020-7462 J9 INT J NONLINEAR MECH JI Int. J. Non-Linear Mech. PD MAR PY 2003 VL 38 IS 2 BP 201 EP 212 AR PII S0020-7462(01)00055-5 DI 10.1016/S0020-7462(01)00055-5 PG 12 WC Mechanics SC Mechanics GA 601WG UT WOS:000178471200005 ER PT J AU Sznaier, M Suarez, R Cloutier, J AF Sznaier, M Suarez, R Cloutier, J TI Suboptimal control of constrained nonlinear systems via receding horizon constrained control Lyapunov functions SO INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL LA English DT Article DE constrained control; control Lyapunov function; receding horizon ID MODEL-PREDICTIVE CONTROL; LINEAR-SYSTEMS; STABILIZATION; STABILITY; OPTIMALITY AB In this paper we propose a new controller design method, based on the combination of receding horizon and control Lyapunov functions, for nonlinear systems subject to input constraints. The main result shows that this control law renders the origin an asymptotically stable equilibrium point in the entire region where stabilization with constrained controls is feasible, while, at the same time, achieving near-optimal performance. Contrary to other approaches, the proposed controller does not require forcing the trajectory at the end of the prediction horizon to lie in a region where the constraints are not binding, allowing for the use of (potentially substantially) smaller horizons in the optimization. Copyright (C) 2003 John Wiley Sons, Ltd. C1 Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA. Univ Autonoma Metropolitana Iztapalapa, Div Ciencias Basicas & Ingn, Mexico City 09000, DF, Mexico. USAF, Navigat & Control Branch, Res Lab, Eglin AFB, FL 32542 USA. RP Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA. EM msznaier@frodo.ee.psu.edu NR 26 TC 15 Z9 15 U1 0 U2 3 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 1049-8923 EI 1099-1239 J9 INT J ROBUST NONLIN JI Int. J. Robust Nonlinear Control PD MAR-APR PY 2003 VL 13 IS 3-4 BP 247 EP 259 DI 10.1002/rnc.816 PG 13 WC Automation & Control Systems; Engineering, Electrical & Electronic; Mathematics, Applied SC Automation & Control Systems; Engineering; Mathematics GA 663KF UT WOS:000182004200005 ER PT J AU Mahle, DA Yu, KO Narayanan, L Mattie, DR Fisher, JW AF Mahle, DA Yu, KO Narayanan, L Mattie, DR Fisher, JW TI Changes in cross-fostered Sprague-Dawley rat litters exposed to perchlorate SO INTERNATIONAL JOURNAL OF TOXICOLOGY LA English DT Article DE cross-foster; in utero; lactational; perchlorate; rat; thyroid; hormone ID THYROID-FUNCTION; DEFICIENCY; TRANSPORT; IODINE; GLAND AB Ammonium perchlorate is used as an oxidizer in rocket fuel. It has become a groundwater contaminant, dissociating to ammonium cation and perchlorate anion. The perchlorate ion competes with iodide for uptake into the thyroid, reducing thyroid hormone production. Pregnant Sprague-Dawley rats were given either untreated or perchlorate (1 mg/kg-day) treated drinking water beginning on gestation day 2. One set of control and exposed dams was sacrificed on gestation day 20. The litters from the second set of control and exposed dams were crossed immediately after parturition and were sacrificed at postnatal day 10. Dam serum and thyroid, pooled fetal sera, and male and female pup sera were collected and analyzed for perchlorate, thyroid-stimulating hormone (TSH), triiodothyronine (T-3), and thyroxine (T-4). Control pups receiving perchlorate through lactation had serum levels at postnatal day 10 of 0.54 mug/ml and 0.56 mug/ml for male and female pups, respectively, whereas exposed fetuses had serum perchlorate levels of 0.38 +/- 0.04 mug/ml. Female pups receiving perchlorate lactationally had significantly lower levels of serum T-4 than control pups and prenatally exposed pups. Serum T-4 levels in male pups were not affected by perchlorate. Serum thyroid hormone levels from gestational perchlorate exposure were restored to control values by postnatal day 10. In utero perchlorate-exposure decreased serum T-4 levels in the fetus. Gestational studies in conjunction with a cross-fostering study design helped discern thyroid hormonal changes caused by perchlorate exposure during the perinatal period. C1 USAF, ManTech Environm Technol Inc, Res Lab, Human Effectiveness Directorate, Wright Patterson AFB, OH 45433 USA. USAF, GEO Ctr Inc, Res Lab, Human Effectiveness Directorate, Wright Patterson AFB, OH 45433 USA. Univ Georgia, Dept Environm Hlth Sci, Athens, GA 30602 USA. RP Mahle, DA (reprint author), POB 31009, Dayton, OH 45437 USA. NR 26 TC 6 Z9 6 U1 0 U2 2 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 1091-5818 J9 INT J TOXICOL JI Int. J. Toxicol. PD MAR-APR PY 2003 VL 22 IS 2 BP 87 EP 94 DI 10.1080/10915810390198366 PG 8 WC Pharmacology & Pharmacy; Toxicology SC Pharmacology & Pharmacy; Toxicology GA 663UP UT WOS:000182024900004 PM 12745989 ER PT J AU Coletta, D Gartzke, E AF Coletta, D Gartzke, E TI War in the error term (vol 53, pg 567, 1999) SO INTERNATIONAL ORGANIZATION LA English DT Correction ID RATIONALIST EXPLANATIONS AB The proof for "War Is in the Error Term," a piece that appeared in the Summer 1999 issue of International Organization, contains a subtle error. Once the correction is made, there are broader implications for testing theories of war using quantitative studies. Large-n tests to verify the incomplete information explanation for war will be more difficult to perform than originally anticipated. C1 USAF Acad, Colorado Springs, CO 80840 USA. Columbia Univ, New York, NY USA. RP Coletta, D (reprint author), USAF Acad, Colorado Springs, CO 80840 USA. NR 7 TC 3 Z9 3 U1 0 U2 1 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH ST, NEW YORK, NY 10011-4221 USA SN 0020-8183 J9 INT ORGAN JI Int. Organ. PD SPR PY 2003 VL 57 IS 2 BP 445 EP + DI 10.1017/S0020818303572083 PG 5 WC International Relations; Political Science SC International Relations; Government & Law GA 696NN UT WOS:000183893100008 ER PT J AU Verhaagen, NG Jobe, CE AF Verhaagen, NG Jobe, CE TI Wind-tunnel study on a 65-deg delta wing at sideslip SO JOURNAL OF AIRCRAFT LA English DT Article ID VORTEX FLOW AB The leeward vortices occurring over low-aspect-ratio delta wings typical of many current fighter aircraft cause highly nonlinear forces and moments. Near stall the vortices break down over the wing surface and introduce additional discontinuities and transients in the aerodynamics. Experimental studies of these flows are needed to develop mathematical models to represent the interaction between the vehicle motion and the forces and moments. The models will permit design for increased maneuverability in future fighters. Many static and dynamic tests of a common 65-deg swept delta wing in pitch and roll were conducted: Here, the effects of sideslip on the flow over a flat-plate 65-deg swept delta wing tested at a geometric angle of attack of 30 deg are described. At this angle of attack, the major part of the flow over the wing is affected by vortex core breakdown. Sideslip causes a strong asymmetry in the breakdown location. This is shown to have a large effect on the surface flow and pressures and on the normal force and pitching moment. C1 Delft Univ Technol, Fac Aerosp Engn, NL-2600 GB Delft, Netherlands. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. RP Verhaagen, NG (reprint author), Delft Univ Technol, Fac Aerosp Engn, POB 5058, NL-2600 GB Delft, Netherlands. NR 15 TC 4 Z9 5 U1 0 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD MAR-APR PY 2003 VL 40 IS 2 BP 290 EP 296 DI 10.2514/2.3092 PG 7 WC Engineering, Aerospace SC Engineering GA 664KM UT WOS:000182060300010 ER PT J AU Shang, JS Hayes, J Menart, J Miller, J AF Shang, JS Hayes, J Menart, J Miller, J TI Blunt body in hypersonic electromagnetic flow field SO JOURNAL OF AIRCRAFT LA English DT Article AB A combined experimental and computational effort has been devoted to investigate the interaction of a plasma counterflow jet and magnetoaerodynamic blunt-body phenomenon in hypersonic streams. The weakly ionized, counterflow jet generated by a plasma torch has a vibrionic temperature of 4400 K, an electron temperature around 20,000 K, and electron number density greater than 3 x 10(12)/cm(3). At a fixed injection stagnation pressure, the plasma injection actually increases drag above that of the room-temperature air counterpart due to a decreased mass flow rate at the elevated temperature. However, at the identical mass flow rate, the plasma injection reveals a greater drag reduction than the room-temperature air jet. It, was found that the drag reduction is mostly derived from the viscous-inviscid interaction of the counterflow jet and thermal energy deposition. For the magnetoaerodynamic blunt-body experiment, the electromagnetic effect by an applied magnetic field from the blunt body is detectable, but its quantification remains elusive. C1 Wright State Univ, Dayton, OH 45435 USA. USAF, Res Lab, Ctr Excellence Comp Simulat, Wright Patterson AFB, OH 45433 USA. RP Shang, JS (reprint author), Wright State Univ, Dayton, OH 45435 USA. NR 25 TC 2 Z9 3 U1 0 U2 4 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD MAR-APR PY 2003 VL 40 IS 2 BP 314 EP 322 DI 10.2514/2.3095 PG 9 WC Engineering, Aerospace SC Engineering GA 664KM UT WOS:000182060300013 ER PT J AU Lucia, DJ Beran, PS King, PI AF Lucia, DJ Beran, PS King, PI TI Reduced-order modeling of an elastic panel in transonic flow SO JOURNAL OF AIRCRAFT LA English DT Article ID DOMAIN DECOMPOSITION; EVOLUTION OPERATORS AB Reduced-order modeling is applied to a transonic aeroelastic panel that experiences oscillatory motions of a normal shock. Two-dimensional, transonic inviscid flow over an elastic panel produces transonic limit-cycle oscillations over a range of panel parameters. Proper orthogonal decomposition, in concert with domain decomposition, is shown to produce an accurate reduced-order model for the coupled aeroelastic system. Panel flutter in the transonic regime results in a large streamwise movement of a transonic normal shock across the panel surface. The accuracy and order reduction of the reduced-order model is quantified. In addition, the computational savings for this implementation is documented, and the robustness of the reduced-order model to changes in a panel parameter is explored. C1 USAF, Inst Technol, Dept Aeronaut & Astronaut, Wright Patterson AFB, OH 45433 USA. USAF, Res Lab, Air Vehicles Directorate, Wright Patterson AFB, OH 45433 USA. USAF, Res Lab, ENY, Wright Patterson AFB, OH 45433 USA. RP Lucia, DJ (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, Room 201,2950 P St,Bldg 640, Wright Patterson AFB, OH 45433 USA. NR 22 TC 10 Z9 13 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD MAR-APR PY 2003 VL 40 IS 2 BP 338 EP 347 DI 10.2514/2.3098 PG 10 WC Engineering, Aerospace SC Engineering GA 664KM UT WOS:000182060300016 ER PT J AU Sentman, DD Wescott, EM Picard, RH Winick, JR Stenbaek-Nielsen, HC Dewan, EM Moudry, DR Sabbas, FTS Heavner, MJ Morrill, J AF Sentman, DD Wescott, EM Picard, RH Winick, JR Stenbaek-Nielsen, HC Dewan, EM Moudry, DR Sabbas, FTS Heavner, MJ Morrill, J TI Simultaneous observations of mesospheric gravity waves and sprites generated by a midwestern thunderstorm SO JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS LA English DT Article; Proceedings Paper CT Conference on Sprites, Elves and Their Global Activities CY SEP 10, 2002 CL FRANKFURT, GERMANY DE sprites; gravity waves; lightning ID OH NIGHTGLOW; PHOTOMETRIC MEASUREMENTS; VIBRATIONAL POPULATIONS; MSX SATELLITE; RED SPRITES; EMISSIONS; STRATOSPHERE; CONVECTION; IONIZATION; EXCITATION AB The present report investigates using simultaneous observations of coincident gravity waves and sprites to establish an upper limit on sprite-associated thermal energy deposition in the mesosphere. The University of Alaska operated a variety of optical imagers and photometers at two ground sites in support of the NASA Sprites99 balloon campaign. One site was atop a US Forest Service lookout tower on Bear Mt. in the Black Hills, in western South Dakota. On the night of 18 August 1999 we obtained from this site simultaneous images of sprites and OH airglow modulated by gravity waves emanating from a very active sprite producing thunderstorm over Nebraska, to the Southeast of Bear Mt. Using 25 s exposures with a bare CCD camera equipped with a red filter, we were able to coincidentally record both short duration ( < 10 ms) but bright ( > 3 MR) N-2 1PG red emissions from sprites and much weaker (similar to1 kR), but persistent, OH Meinel nightglow emissions. A time lapse movie created from images revealed short period, complete 360degrees concentric wave structures emanating radially outward from a central excitation region directly above the storm. During the initial stages of the storm outwardly expanding waves possessed a period of tau approximate to 10 min and wavelength lambda approximate to 50 km. Over a 1 h interval the waves gradually changed to longer period tau approximate to 11 min and shorter wavelength lambda approximate to 40 km. Over the full 2 It observation time, about two dozen bright sprites generated by the underlying thunderstorm were recorded near the center of the outwardly radiating gravity wave pattern. No distinctive OH brightness signatures uniquely associated with the sprites were detected at the level of 2% of the ambient background brightness, establishing an associated upper limit of approximately DeltaT less than or equal to 0.5 K for a neutral temperature perturbation over the Volume of the sprites. The corresponding total thermal energy deposited by the sprite is bounded by these measurements to be less than similar to1 GJ. This value is well above the total energy deposited into the medium by the sprite, estimated by several independent methods to be on the order of similar to1-10 MJ. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Univ Alaska, Inst Geophys, Fairbanks, AK 99775 USA. USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA USA. Los Alamos Natl Lab, NIS1, Los Alamos, NM 87545 USA. USN, Res Lab, EO Hulburt Ctr Space Res, Washington, DC 20375 USA. RP Sentman, DD (reprint author), Univ Alaska, Inst Geophys, Fairbanks, AK 99775 USA. RI Sao Sabbas, Fernanda/B-7999-2014 OI Sao Sabbas, Fernanda/0000-0002-4381-7446 NR 57 TC 92 Z9 92 U1 2 U2 9 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1364-6826 J9 J ATMOS SOL-TERR PHY JI J. Atmos. Sol.-Terr. Phys. PD MAR PY 2003 VL 65 IS 5 BP 537 EP 550 DI 10.1016/S1364-6826(02)00328-0 PG 14 WC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences SC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences GA 676GU UT WOS:000182743600008 ER PT J AU Bliss, DF Tassev, VL Weyburne, D Bailey, JS AF Bliss, DF Tassev, VL Weyburne, D Bailey, JS TI Aluminum nitride substrate growth by halide vapor transport epitaxy SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 14th American Conference on Crystal Growth and Epitaxy CY AUG 04-09, 2002 CL SEATTLE, WASHINGTON SP Amer Assoc Crystal Growth, Amer Chem Soc, Journal Crystal Growth & Design, Coherent Crystal Associates, Crystal Syst Inc, Engelhard Clal LP, Eichem Inc, Haraus, Mat Technol Div, Johnson Matthey Corp, Thermal Technol Inc, Toyo Tanso USA Inc, Vesuvius McDanel, Zicar Ceramics Inc, Shopley Metalorgan, Pillar Ind, Rath Performance Fibers DE halide vapor phase epitaxy; nitrides ID FILMS; AIN; CRYSTALS AB High-quality AlN layers with thickness up to 50 pm have been grown by HVTE at growth rates up to 60 mum/h at deposition temperatures of 1000-1100degreesC in the pressure range of 50-760 Torr. The HVT process uses an aluminum chloride amine adduct as the aluminum source and ammonia for the nitrogen. This new technique eliminates the main difficulties of the conventional HVPE growth, where aluminum oxidation and the strong reactivity of aluminum chloride with quartz create the potential for oxygen contamination. The crystalline layer quality as determined by X-ray rocking curve measurement shows FWHM of 300-900 and 500-1300 arcsec for (0 0 2) and (1 0 2) planes, respectively. (C) 2002 Elsevier Science B.V. All rights reserved. C1 USAF, Res Lab, Sensors Directorate, Hanscom AFB, MA 01731 USA. Solid State Sci Corp, Hollis, NH 03049 USA. RP Bliss, DF (reprint author), USAF, Res Lab, Sensors Directorate, 80 Scott Rd, Hanscom AFB, MA 01731 USA. NR 15 TC 15 Z9 15 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD MAR PY 2003 VL 250 IS 1-2 BP 1 EP 6 DI 10.1016/S0022-0248(02)02179-6 PG 6 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 652HE UT WOS:000181373100003 ER PT J AU Morton, JL Ma, N Bliss, DF Bryant, GG AF Morton, JL Ma, N Bliss, DF Bryant, GG TI Magnetic field effects during liquid-encapsulated Czochralski growth of doped photonic semiconductor crystals SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 14th American Conference on Crystal Growth and Epitaxy CY AUG 04-09, 2002 CL SEATTLE, WASHINGTON SP Amer Assoc Crystal Growth, Amer Chem Soc, Journal Crystal Growth & Design, Coherent Crystal Associates, Crystal Syst Inc, Engelhard Clal LP, Eichem Inc, Haraus, Mat Technol Div, Johnson Matthey Corp, Thermal Technol Inc, Toyo Tanso USA Inc, Vesuvius McDanel, Zicar Ceramics Inc, Shopley Metalorgan, Pillar Ind, Rath Performance Fibers DE magnetic fields; mass transfer; segregation; growth from melt; liquid encapsulated Czochralski method; magnetic field assisted Czochralski method; semiconducting III-V compounds ID DOPANT TRANSPORT; CONVECTION AB During the liquid-encapsulated Czochralski (LEC) process, a single compound semiconductor crystal such as indium phosphide or gallium antimonide is grown by the solidification of an initially molten semiconductor contained in a crucible. The motion of the electrically conducting molten semiconductor can be controlled with an externally applied magnetic field. This paper presents a model for the unsteady transport of a dopant during the LEC process with a steady axial magnetic field. The convective species transport during growth produces significant segregation in both the melt and the crystal. Dopant distributions in the crystal and in the melt at several different stages during growth are presented. (C) 2002 Elsevier Science B.V. All rights reserved. C1 N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA. Univ Missouri, Dept Mech & Aerosp Engn & Engn Mech, Rolla, MO 65409 USA. USAF, Res Lab, Sensors Directorate, AFRL,SNHC, Hanscom AFB, MA 01731 USA. RP Ma, N (reprint author), N Carolina State Univ, Dept Mech & Aerosp Engn, Campus Box 7910, Raleigh, NC 27695 USA. NR 12 TC 9 Z9 12 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD MAR PY 2003 VL 250 IS 1-2 BP 174 EP 182 DI 10.1016/S0022-0248(02)02261-3 PG 9 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 652HE UT WOS:000181373100032 ER PT J AU Brown, PP Lawler, DF AF Brown, PP Lawler, DF TI Sphere drag and settling velocity revisited SO JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE LA English DT Article DE sedimentation; settling velocity; particle motion; spheres; drag ID TERMINAL VELOCITY; NONSPHERICAL PARTICLES; REYNOLDS-NUMBERS; FLOW PAST; COEFFICIENT AB Sphere drag data from throughout the twentieth century are available in tabular form. However, much of the data arose from experiments in small diameter cylindrical vessels, where the results might have been influenced by the wall effect. Wall effect corrections developed by others were applied to 178 of the 480 data points collected. This corrected data set is believed to be free of the influence of wall effects. Existing drag and settling velocity correlations were compared to this data set. In addition, new correlations of the same forms were developed using the corrected data. Two new correlations of sphere terminal velocity are proposed, one applicable for all Reynolds numbers less than 2 X 10(5), and the other designed to predict settling velocities with exceptional accuracy for terminal Reynolds numbers less than 4,000, a region that contains almost all applications of interest in environmental engineering. The trial and error solution for settling velocity using the Fair and Geyer equation for drag should be retired in favor of the direct calculation available from these new correlations. C1 Univ Texas, Dept Civil Engn, Austin, TX 78712 USA. USAF, Washington, DC 20330 USA. RP Lawler, DF (reprint author), Univ Texas, Dept Civil Engn, ECJ 8-6, Austin, TX 78712 USA. NR 42 TC 112 Z9 117 U1 3 U2 36 PU ASCE-AMER SOC CIVIL ENGINEERS PI RESTON PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA SN 0733-9372 J9 J ENVIRON ENG-ASCE JI J. Environ. Eng.-ASCE PD MAR PY 2003 VL 129 IS 3 BP 222 EP 231 DI 10.1061/(ASCE)0733-9372(2003)129:3(222) PG 10 WC Engineering, Environmental; Engineering, Civil; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 645UT UT WOS:000180998400007 ER PT J AU Sheta, EF Huttsell, LJ AF Sheta, EF Huttsell, LJ TI Characteristics of F/A-18 vertical tail buffeting SO JOURNAL OF FLUIDS AND STRUCTURES LA English DT Article AB A time-accurate computational analysis of vertical tail buffeting of full F/A-18 aircraft is conducted at typical flight conditions to identify the buffet characteristics of fighter aircraft. The F/A-18 aircraft is pitched at wide range of high angles of attack at Mach number of 0.243 and Reynolds number of 11 millions. Strong coupling between the fluid and structure is considered in this investigation. Strong coupling occurs when the inertial effect of the motion of the vertical tail is fed back into the flow field. The aerodynamic flow field around the F/A-18 aircraft is computed using the Reynolds-averaged full Navier-Stokes equations. The dynamical structural response of the vertical tail is predicted using direct finite-element analysis. The interface between the fluid and structure is applied using conservative and consistent interfacing methodology. The motion of the computational grid due to the deflection of the vertical tail is computed using transfinite interpolation module. The investigation revealed that the vertical tail is subject to bending and torsional responses, mainly in the first modes of vibrations. The buffet loads increase significantly as the onset of vortex breakdown moves upstream of the vertical tails. The inboard surface of the vertical tail has more significant contribution in the buffet excitation than the outboard surface. In addition, the pressure on the outboard surface of the vertical tail is less sensitive to the angle of attack than the pressure on the inboard surface. The buffet excitation peaks shift to lower frequency as the angle of attack increases. The computational results are compared, and they are in close agreement, with several flight and experimental data. Published by Elsevier Science Ltd. C1 CFD Res Corp, Huntsville, AL 35805 USA. USAF, RL, Wright Patterson AFB, Dayton, OH 45433 USA. RP Sheta, EF (reprint author), CFD Res Corp, 215 Wynn Dr, Huntsville, AL 35805 USA. NR 33 TC 2 Z9 3 U1 0 U2 2 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0889-9746 J9 J FLUID STRUCT JI J. Fluids Struct. PD MAR PY 2003 VL 17 IS 3 BP 461 EP 477 AR PII S0889-9746(02)00138-X DI 10.1016/S0889-9746(02)00138-X PG 17 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA 669XD UT WOS:000182375100007 ER PT J AU Senkov, ON Miracle, DB AF Senkov, ON Miracle, DB TI A topological model for metallic glass formation SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT Annual Meeting of The-Minerals-Metals-and-Materials-Society CY FEB 17-21, 2002 CL SEATTLE, WASHINGTON SP Minerals Met & Mat Soc, Extract & Proc Div AB A topological model for metallic glass formation is proposed. A critical feature of this model is that a solute occupying either substitutional or interstitial sites in the host crystalline lattice can destabilize the lattice by producing a critical internal strain and changing the local coordination number. Further, the element may partition between these two types of site and the relative site frequency is a function of the strain energy associated with each site. According to the model, the critical concentration of a solute required to amorphize the alloy decreases, reaches a minimum and then increases as the atomic size of the solute decreases relative to the size of the matrix atom. (C) 2003 Elsevier Science B.V. All rights reserved. C1 UES Inc, Mat & Proc Div, Dayton, OH 45432 USA. USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. RP Senkov, ON (reprint author), UES Inc, Mat & Proc Div, 4401 Dayton Xenia Rd, Dayton, OH 45432 USA. RI Senkov, Oleg/C-7197-2012 OI Senkov, Oleg/0000-0001-5587-415X NR 9 TC 54 Z9 57 U1 2 U2 20 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD MAR PY 2003 VL 317 IS 1-2 BP 34 EP 39 DI 10.1016/S0022-3093(02)01980-4 PG 6 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA 650FB UT WOS:000181251300007 ER PT J AU Miracle, DB AF Miracle, DB TI On the universal model for medium-range order in amorphous metal structures SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT Annual Meeting of the Minerals-Metals-and-Materials-Society CY FEB 17-21, 2002 CL SEATTLE, WA SP Minerals, Met & Mat Soc, Extract & Proc Div ID GLASSES; SOLIDS; ALLOYS AB A critical assessment is provided of the proposition that a universal model exists for the medium-range structure of metallic glasses. Previous studies are reconsidered from a topological perspective. While support for universal medium-range order has been based on chemically distinct systems, it is shown that these alloys are topologically very similar regarding the relative size of solute and solvent atoms. The short-range structural order in metal-metalloid glasses capped trigonal prisms - is shown to be unlikely in metallic glasses where the solute radius is greater than about 80% of the solvent. Other possible short-range ordered configurations, including icosahedra, are possible based on geometric arguments. While a universal model for medium-range order may exist in spite of different short-range ordering, it is nevertheless likely that alloys with significantly different atom radius ratios will possess distinct medium range ordering. Additional studies in topologically distinct systems are required to unambiguously assess the universality of medium-range order in metallic glasses. (C) 2003 Elsevier Science B.V. All rights reserved. C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. RP USAF, Res Lab, Mat & Mfg Directorate, Bldg 655,2230 10th St,Suite 1, Wright Patterson AFB, OH 45433 USA. EM daniel.miracle@wpafb.af.mil NR 23 TC 15 Z9 16 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 EI 1873-4812 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD MAR PY 2003 VL 317 IS 1-2 BP 40 EP 44 DI 10.1016/S0022-3093(02)01981-6 PG 5 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA 650FB UT WOS:000181251300008 ER PT J AU Jacobsen, LS Gallimore, SD Schetz, JA O'Brien, WF AF Jacobsen, LS Gallimore, SD Schetz, JA O'Brien, WF TI Integration of an aeroramp injector/plasma igniter for hydrocarbon scramjets SO JOURNAL OF PROPULSION AND POWER LA English DT Article ID SUPERSONIC-FLOW; PLASMA TORCH; HELIUM AB A hydrocarbon-fuel injection and ignition/flame-holding system consisting of an aerodynamic-ramp injector and a DC plasma torch was designed for a scramjet vehicle operating from Mach 4 to Mach 8. It was tested in an unheated Mach 2.4 flow for initial evaluation. The injector consisted of two rows of two holes, angled downstream, and toed in to create additional vorticity and enhance mixing. The, plasma torch was placed downstream of the injector at three different locations. The experiments involved ethylene injection through the aeroramp at jet-to-freestream momentum-flux ratios from 1.4 to 3.2. Methane and nitrogen were used as the main feedstocks for the plasma torch. The power output of the plasma torch varied from 1500 to 3000 W. Results showed that nitrogen outperformed methane, and increasing the oxygen content at the plasma/fuel-plume interface significantly improved the potential for ignition and flame propagation. The methane and nitrogen feedstocks performed best at the closest and middle downstream torch stations relative to the ethylene-fuel plume, respectively. Because of the low static freestream temperature (131 K), very little heat release was produced under these cold-flow conditions. Tests in a, model scramjet combustor with hot flow are needed to complete the evaluation of this system. In addition, at all three torch stations, the counter-rotating vortex motion of the fuel-injector plume lifted up the plasma-torch plume. As a result, the downstream temperature-plume cores were 2.5 and 3.5 times higher at injector jet-to-freestream momentum-flux ratios of 1.5 and 3.0, respectively, compared to the torch alone. C1 Virginia Polytech Inst & State Univ, Dept Aerosp & Ocean Engn, Blacksburg, VA 24061 USA. Virginia Polytech Inst & State Univ, Dept Mech Engn, Blacksburg, VA 24061 USA. RP Jacobsen, LS (reprint author), USAF, Res Labs, Aerosp Prop Off, NRC, Wright Patterson AFB, OH 45433 USA. NR 43 TC 20 Z9 20 U1 0 U2 7 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 USA SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD MAR-APR PY 2003 VL 19 IS 2 BP 170 EP 182 DI 10.2514/2.6114 PG 13 WC Engineering, Aerospace SC Engineering GA 656GX UT WOS:000181579400002 ER PT J AU Stuckey, RM Lewis, MJ AF Stuckey, RM Lewis, MJ TI Hypersonic missile requirements and operational tradeoff studies SO JOURNAL OF SPACECRAFT AND ROCKETS LA English DT Article C1 USAF, Edwards AFB, CA 93524 USA. Univ Maryland, Dept Aerosp Engn, College Pk, MD 20742 USA. RP Stuckey, RM (reprint author), USAF, 412th Flight Test Squadron, Edwards AFB, CA 93524 USA. NR 11 TC 3 Z9 3 U1 0 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0022-4650 J9 J SPACECRAFT ROCKETS JI J. Spacecr. Rockets PD MAR-APR PY 2003 VL 40 IS 2 BP 292 EP 293 DI 10.2514/2.3945 PG 2 WC Engineering, Aerospace SC Engineering GA 664NU UT WOS:000182067800018 ER PT J AU Kidd, G Mason, CR Arbogast, TL Brungart, DS Simpson, BD AF Kidd, G Mason, CR Arbogast, TL Brungart, DS Simpson, BD TI Informational masking caused by contralateral stimulation SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article; Proceedings Paper CT 141st Meeting of the Acoustical-Society-of-America CY JUN 04-08, 2001 CL CHICAGO, ILLINOIS SP Acoust Soc Amer ID COCKTAIL PARTY PHENOMENON; NONSPEECH AUDITORY PATTERNS; MULTICOMPONENT MASKERS; SPATIAL SEPARATION; ENERGETIC MASKING; RANDOM-FREQUENCY; SIMULTANEOUS TALKERS; TONAL PATTERNS; DISCRIMINATION; ATTENTION AB Although informational masking is thought to reflect central, mechanisms, the effects are generally much stronger. when the target and masker are presented to the same ear than when they are presented to different ears. However, the results of a recent study by Brungart and Simpson [J. Acoust. Soc. Am. 112, 2985-2995 (2002)] indicated that a speech masker that is presented contralateral to a speech signal can produce substantial amounts of informational masking when a second speech masker is played simultaneously in the same ear as the signal. In this study, we conducted a series of experiments that paralleled those of Brungart and Simpson but used a pure-tone signal and multitone informational maskers in a detection task. Both the signal and the maskers were played as sequences of short bursts in each observation interval. The maskers were arranged in two types of spectrotemporal patterns. One type of pattern, called "multiple-bursts same" (MBS), has previously been shown to produce very large amounts of informational masking while the other type of pattern, called "multiple-bursts different" (MBD), has been shown to produce very small amounts of informational masking. Several conditions of ipsilateral, contralateral, and combined presentation of these maskers were tested. The results showed that presentation of the MBS masker in the contralateral ear produced a substantial amount of informational masking when the MBD masker was simultaneously presented to the ipsilateral ear. The results supported the earlier findings of Brungart and Simpson indicating that listeners are unable to selectively focus their attention on a. single ear in some complex dichotic listening conditions. These results suggest that this contralateral masking effect is not restricted to speech and may reflect more general limitations on processing capacity. Further, it was concluded that the magnitude of the contralateral masking effect was related both to the informational masking value of the contralateral masker and the complexity of the stimulus and/or task in the ear in which the signal was presented. (C) 2003 Acoustical Society of America. C1 Boston Univ, Sargent Coll, Hearing Res Ctr, Boston, MA 02132 USA. USAF, Res Lab, AFRL HECB, Wright Patterson AFB, OH 45433 USA. Veridian, Dayton, OH 45431 USA. RP Kidd, G (reprint author), Boston Univ, Sargent Coll, Hearing Res Ctr, 635 Commonwealth Ave, Boston, MA 02132 USA. FU NIDCD NIH HHS [R01 DC004545, DC00100, DC04545] NR 46 TC 24 Z9 25 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 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD MAR PY 2003 VL 113 IS 3 BP 1594 EP 1603 DI 10.1121/1.1547440 PG 10 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA 653CB UT WOS:000181416700042 PM 12656394 ER PT J AU Lu, WJ Mitchel, WC Thornton, CA Collins, WE Landis, GR Smith, SR AF Lu, WJ Mitchel, WC Thornton, CA Collins, WE Landis, GR Smith, SR TI Ohmic contact behavior of carbon films on SiC SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID AMORPHOUS-CARBON; RAMAN-SPECTRA; ELECTRICAL-PROPERTIES; THIN-FILMS; DIAMOND; CHEMISTRY; CARBIDE; DEVICES; COBALT; MICROSTRUCTURE AB We demonstrate ohmic contacts to SiC using carbon films after thermal annealing. Carbon films are deposited on 4H-SiC and 6H-SiC substrates using a radio frequency sputtering method. The carbon/SiC samples convert from Schottky behavior to ohmic behavior after annealing in the temperature range from 1150 to 1350degreesC. Nanosize graphitic flakes are identified after annealing by Raman spectroscopy and are associated with the ohmic behavior of the contacts. The contact behavior of carbon films on 4H-SiC and 6H-SiC after annealing are compared and the polytype of the SiC has no effects on the structural evolution of the carbon films during annealing. This study reveals that the structural evolution of carbon is associated with formation of ohmic contacts on SiC and that nanosize graphitic flakes play a determinative role in the formation of ohmic contacts. (C) 2003 The Electrochemical Society. C1 Fisk Univ, Dept Phys, Nashville, TN 37208 USA. USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Univ Dayton, Res Inst, Dayton, OH 45469 USA. RP Fisk Univ, Dept Phys, Nashville, TN 37208 USA. EM wlu@fisk.edu NR 43 TC 21 Z9 22 U1 1 U2 4 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA SN 0013-4651 EI 1945-7111 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD MAR PY 2003 VL 150 IS 3 BP G177 EP G182 DI 10.1149/1.1540066 PG 6 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA 647LE UT WOS:000181093600059 ER PT J AU Raymond, RW McHugh, CP Witt, LR Kerr, SF AF Raymond, RW McHugh, CP Witt, LR Kerr, SF TI Temporal and spatial distribution of Leishmania mexicana infections in a population of Neotoma micropus SO MEMORIAS DO INSTITUTO OSWALDO CRUZ LA English DT Article DE Leishmania mexicana; Neotonia micropus; prevalence; mark-release-recapture; transmission; ecology; Texas ID SAND FLIES DIPTERA; SOUTHERN PLAINS; TEXAS; PSYCHODIDAE; IDENTIFICATION; ARIZONA AB A 19-month mark-release-recapture study of Neotoma micropus with sequential screening for Leishmania mexicana was conducted in Bexar County, Texas, USA. The overall prevalence rate was 14.7% and the seasonal prevalence rates ranged from 3.8 to 26.7%. Nine incident cases were detected, giving an incidence rate of 15.5/100 rats/year. Follow-tip of 101 individuals captured two or more times ranged from 14 to 462 days. Persistence of L. mexicana infections averaged 190 days and ranged from 104 to 379 days. Data on dispersal, density, dispersion, and weight are presented, and the role of N. micropus as a reservoir host for L. mexicana is discussed. C1 USAF, Inst Environm Safety & Occupat Hlth Risk Anal, Brooks AFB, TX 78235 USA. Univ Incarnate Word, Dept Biol, San Antonio, TX USA. RP McHugh, CP (reprint author), USAF, Inst Environm Safety & Occupat Hlth Risk Anal, Brooks AFB, TX 78235 USA. FU NIGMS NIH HHS [GM 55337] NR 23 TC 8 Z9 9 U1 1 U2 4 PU FUNDACO OSWALDO CRUZ PI RIO DE JANEIRO, RJ PA AV BRASIL 4365, 21045-900 RIO DE JANEIRO, RJ, BRAZIL SN 0074-0276 J9 MEM I OSWALDO CRUZ JI Mem. Inst. Oswaldo Cruz PD MAR PY 2003 VL 98 IS 2 BP 171 EP 180 DI 10.1590/S0074-02762003000200002 PG 10 WC Parasitology; Tropical Medicine SC Parasitology; Tropical Medicine GA 669QR UT WOS:000182362400002 PM 12764430 ER PT J AU Stefansson, N Semiatin, SL AF Stefansson, N Semiatin, SL TI Mechanisms of globularization of Ti-6Al-4V during static heat treatment SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID PLATE-LIKE STRUCTURES; SHAPE INSTABILITIES; PEARLITE SPHEROIDIZATION; ELEVATED-TEMPERATURES; MICROSTRUCTURES; COMPOSITES; KINETICS; ALLOYS AB The mechanisms controlling static globularization of Ti-6Al-4V after deformation and annealing at 900 degreesC and 955 degreesC were established. Microstructural observations suggested that the process of globularization can be divided into two stages. The first includes microstructural changes during deformation and the initial stages of static heat treatment; the second occurs during prolonged static annealing. The initial stage consists of segmentation of the lamellae via boundary splitting, whereas microstructural coarsening characterizes the latter stage. Thus, the process of static globularization is only moderately dependent on the formation and evolution of dislocation substructure; the additional driving force is provided by the reduction in interface energy. The duration of the initial stage of static globularization was calculated by estimating the time required for the completion of the boundary-splitting process. The calculations were in excellent agreement with microstructural observations and showed that the duration of the initial stage at 900 degreesC and 955 degreesC lasted approximately 10 hours and I hour, respectively. C1 USAF, Res Lab, MLLM, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Precis Cast Parts, Struct Div, Mat & Technol Grp, Portland, OR 97206 USA. RI SEMIATIN, SHELDON/E-7264-2017 NR 26 TC 78 Z9 87 U1 4 U2 39 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD MAR PY 2003 VL 34 IS 3 BP 691 EP 698 DI 10.1007/s11661-003-0103-3 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 651YW UT WOS:000181352400026 ER PT J AU Abadi, J AF Abadi, J TI Untitled - Reply SO MIDDLE EAST JOURNAL LA English DT Letter C1 USAF Acad, Washington, DC USA. RP Abadi, J (reprint author), USAF Acad, Washington, DC USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MIDDLE EAST INSTITUTE PI WASHINGTON PA 1761 N STREET NW, CIRCULATION DEPT, WASHINGTON, DC 20036-2882 USA SN 0026-3141 J9 MIDDLE EAST J JI Middle East J. PD SPR PY 2003 VL 57 IS 2 BP 368 EP 368 PG 1 WC Area Studies SC Area Studies GA 682UT UT WOS:000183111300032 ER PT J AU Nelson, MS Gordon, MS AF Nelson, MS Gordon, MS TI Physical activity determinants of military health care recipients SO MILITARY MEDICINE LA English DT Article ID SELF-EFFICACY; INTRINSIC MOTIVATION; EXERCISE; MAINTENANCE; ADOPTION AB This study describes physical activity determinants (motivation, self-efficacy, benefits/barriers, and stage of change) of 71 healthy, military-affiliated volunteers, 28 men and 43 women (mean age, 31 7 years) from a military primary care setting. The physical activity determinants were measured with investigator-administered questionnaires at three time points over 8 months. The Kruskal-Wallis analysis of variance indicated that there were significant differences (p < 0.0001) among factors determining self-efficacy, motivation, and benefits/barriers. The subjects reported being most confident that they could be physically active even if they had to do it by themselves. The chief benefit reported was an improvement in physical performance, whereas the leading barrier to physical activity was the physical exertion involved. The biggest motivator was the positive health effect gained. Most subjects considered themselves to be in the "maintenance" stage of change. This study provides a platform for the development of an effective physical activity intervention in this population. C1 Hlth & Wellness Ctr, Andrews AFB, MD 20331 USA. RP Nelson, MS (reprint author), Hlth & Wellness Ctr, Andrews AFB, MD 20331 USA. NR 19 TC 3 Z9 3 U1 2 U2 4 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA SN 0026-4075 J9 MIL MED JI Milit. Med. PD MAR PY 2003 VL 168 IS 3 BP 212 EP 218 PG 7 WC Medicine, General & Internal SC General & Internal Medicine GA 743AA UT WOS:000186549200009 PM 12685686 ER PT J AU Driggers, RG Vollmerhausen, RH Devitt, N Halford, C Barnard, KJ AF Driggers, RG Vollmerhausen, RH Devitt, N Halford, C Barnard, KJ TI Impact of speckle on laser range-gated shortwave infrared imaging system target identification performance SO OPTICAL ENGINEERING LA English DT Article DE laser range-gated imaging; electro-optics performance modeling ID NOISE AB The U.S. Army and the U.S. Air Force are investigating laser range-gated shortwave IR (LRG-SWIR) imaging systems for use in target identification. When coupled to an electron-bombarded CCD, the imaging system can obtain high-resolution images at long ranges. Speckle, an image artifact inherent in laser-illuminated imaging systems, results from interference patterns caused by the coherent illumination. Laser speckle degrades target identification performance but can be reduced by averaging successive LRG-SWIR images. This research is a first attempt at quantifying target identification performance degradation associated with laser speckle. The research begins with a laboratory experiment to verify a speckle model that includes power spectral density and intensity probability density functions. An LRG-SWIR sensor simulation is developed that includes coherent illumination resulting in speckle target images. A field demonstration is performed to verify the fidelity of the simulation. The simulation is then applied to the U.S. Army Night Vision and Electronic Sensors Directorate (NVESD) target identification set with various levels of image averaging and blur. Observer performance results are analyzed in terms of target identification probability and the effects of various levels of blur and speckle are characterized. (C) 2003 Society of Photo-Optical Instrumentation Engineers. C1 Univ Memphis, Dept Elect Engn, Memphis, TN 38152 USA. USAF, Res Lab, SNJT, Wright Patterson AFB, OH 45433 USA. RP Driggers, RG (reprint author), USA, Night Vis & Elect Sensors Directorate, Modeling & Simulat Div, 10221 Burbeck Rd, Ft Belvoir, VA 22060 USA. NR 12 TC 30 Z9 33 U1 1 U2 8 PU SPIE-INT SOCIETY OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD MAR PY 2003 VL 42 IS 3 BP 738 EP 746 DI 10.1117/1.1543159 PG 9 WC Optics SC Optics GA 655ZQ UT WOS:000181583800022 ER PT J AU Hanley, B AF Hanley, B TI Modernity's 'Mr-Rambler': Tobias Wolff's exploration of vanity and self-deception in The 'Night in Question' SO PAPERS ON LANGUAGE AND LITERATURE LA English DT Article C1 USAF Acad, Colorado Springs, CO 80840 USA. RP Hanley, B (reprint author), USAF Acad, Colorado Springs, CO 80840 USA. NR 8 TC 1 Z9 1 U1 1 U2 1 PU SOUTHERN ILLINOIS UNIV PI EDWARDSVILLE PA BOX 43-A, EDWARDSVILLE, IL 62026-1434 USA SN 0031-1294 J9 PAP LANG LIT JI Pap. Lang. Lit. PD SPR PY 2003 VL 39 IS 2 BP 144 EP 161 PG 18 WC Literary Theory & Criticism; Language & Linguistics; Literature SC Literature; Linguistics GA 684PT UT WOS:000183216300002 ER PT J AU Elwood, RL Pelszynski, MM Corman, LI AF Elwood, RL Pelszynski, MM Corman, LI TI Multifocal septic arthritis and osteomyelitis caused by group A Streptococcus in a patient receiving immunomodulating therapy with etanercept SO PEDIATRIC INFECTIOUS DISEASE JOURNAL LA English DT Article DE enbrel; etanercept; group A Streptococcus; juvenile rheumatoid arthritis; septic arthritis ID RHEUMATOID-ARTHRITIS; INFECTIONS; CHILDREN AB A 12-year-old girl with juvenile rheumatoid arthritis presented with signs of infection of the proximal interphalangeal joint of her left great toe 1 week after a flu-like illness. Several joints and one bone were subsequently found to be infected with group A beta-hemolytic streptococci. Despite appropriate antibiotic therapy, synovial fluid cultures remained positive for 2 weeks. We believe that the antiinflammatory medications, including etanercept (a tumor necrosis factor antagonist), used to treat this patient's arthritis contributed to the severity and unusual course of her infection. C1 David Grant Med Ctr, Dept Pediat, SGOC, Travis AFB, CA 94535 USA. RP Elwood, RL (reprint author), David Grant Med Ctr, Dept Pediat, SGOC, 101 Bodin Circle, Travis AFB, CA 94535 USA. EM Robert.Elwood@60mdg.travis.af.mil NR 13 TC 28 Z9 28 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0891-3668 J9 PEDIATR INFECT DIS J JI Pediatr. Infect. Dis. J. PD MAR PY 2003 VL 22 IS 3 BP 286 EP 288 DI 10.1097/00006454-200303000-00020 PG 3 WC Immunology; Infectious Diseases; Pediatrics SC Immunology; Infectious Diseases; Pediatrics GA 660GH UT WOS:000181825100018 PM 12664882 ER PT J AU Bothwell, DN Mair, EA Cable, BB AF Bothwell, DN Mair, EA Cable, BB TI Chronic ingestion of a zinc-based penny SO PEDIATRICS LA English DT Article; Proceedings Paper CT Meeting of the American-Broncho-Esophagological-Association CY MAY 11-12, 2002 CL BOCA RATON, FLORIDA SP Amer Broncho Esophagol Assoc ID COIN INGESTION; CHLORIDE INGESTION; APPEARANCE; TOXICITY; CHILD C1 Walter Reed Army Med Ctr, Dept Otolaryngol Head & Neck Surg, Washington, DC 20307 USA. Univ Iowa Hosp & Clin, Dept Otolaryngol Head & Neck Surg, Iowa City, IA 52242 USA. RP Mair, EA (reprint author), Wilford Hall USAF Med Ctr, Pediat Otolaryngol Serv, 2200 Bergquist Dr,Ste 1, San Antonio, TX 78236 USA. NR 14 TC 12 Z9 12 U1 0 U2 3 PU AMER ACAD PEDIATRICS PI ELK GROVE VILLAGE PA 141 NORTH-WEST POINT BLVD,, ELK GROVE VILLAGE, IL 60007-1098 USA SN 0031-4005 J9 PEDIATRICS JI Pediatrics PD MAR PY 2003 VL 111 IS 3 BP 689 EP 691 DI 10.1542/peds.111.3.689 PG 4 WC Pediatrics SC Pediatrics GA 650ZD UT WOS:000181294000060 PM 12612262 ER PT J AU Halloran, MA Wirtjes, MM AF Halloran, MA Wirtjes, MM TI Impact of issued prescriptions and/or written recommendations on pneumococcal vaccination rates among diabetic patients. SO PHARMACOTHERAPY LA English DT Meeting Abstract CT Spring Practice and Research Forum of the American-College-of-Clinical-Pharmacy CY APR 27-30, 2003 CL PALM SPRINGS, CALIFORNIA SP American Coll Clin Pharmacy C1 Univ Oklahoma, Oklahoma City, OK USA. Tinker Air Force Base, Tinker AFB, OK 73145 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PHARMACOTHERAPY PUBLICATIONS INC PI BOSTON PA NEW ENGLAND MEDICAL CENTER, 806, 750 WASHINGTON ST, BOSTON, MA 02111 USA SN 0277-0008 J9 PHARMACOTHERAPY JI Pharmacotherapy PD MAR PY 2003 VL 23 IS 3 MA 210 BP 424 EP 424 PG 1 WC Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA 650JL UT WOS:000181259900182 ER PT J AU Fu, BX Gelfer, MY Hsiao, BS Phillips, S Viers, B Blanski, R Ruth, P AF Fu, BX Gelfer, MY Hsiao, BS Phillips, S Viers, B Blanski, R Ruth, P TI Physical gelation in ethylene-propylene copolymer melts induced by polyhedral oligomeric silsesquioxane (POSS) molecules SO POLYMER LA English DT Article DE POSS; ethylene propylene copolymer; nanocomposite ID GEL POINT; LINEAR VISCOELASTICITY; HYBRID MATERIALS; FILLED POLYMERS; RHEOLOGY; CRYSTALLIZATION AB The rheological behavior of ethylene-propylene (EP) copolymers containing polyhedral oligomeric silsesquioxane (POSS) molecules was investigated by means of wide-angle X-ray diffraction (WAXD), oscillatory shear, stress and strain controlled rheology in the molten state and dynamic mechanical analysis (DMA) in the solid state. WAXD results showed that the majority of POSS molecules in the EP melt were present in the crystal form. Oscillatory shear results showed that the EP/POSS nanocomposites exhibited a solid-like rheological behavior compared with the liquid-like rheological behavior in the neat resin, i.e. POSS caused physical gelation in EP. While POSS exhibited only a minimum effect on the flow activation energy of EP, the high POSS concentration samples were found to induce higher yield stress than the neat resin. This behavior was similar to the Bingham rheology, indicative of a structured fluid. DMA results indicated that the presence of POSS increased the Young's modulus as well as the T-g of the EP copolymer. These results suggested that two types of interactions contributed to the physical gelation in EP/POSS melts were present: the strong particle-to-particle interactions between the POSS crystals and the weak particle-to-matrix interactions between the POSS crystals and the EP matrix. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. USAF, Res Lab, Propuls Directorate, Edwards AFB, CA 93524 USA. RP Hsiao, BS (reprint author), SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. EM bhsiao@notes.cc.sunysb.edu NR 25 TC 130 Z9 139 U1 6 U2 39 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0032-3861 J9 POLYMER JI Polymer PD MAR PY 2003 VL 44 IS 5 BP 1499 EP 1506 DI 10.1016/S0032-3861(03)00018-1 PG 8 WC Polymer Science SC Polymer Science GA 647ZU UT WOS:000181124600020 ER PT J AU Cheng, CG Curliss, D AF Cheng, CG Curliss, D TI Thermally-cured and e-beam-cured epoxy layered-silicate nanocomposites SO POLYMER BULLETIN LA English DT Article ID COMPOSITES AB Research on nanocomposites attracted a lot of attention because of their unique nanostructure and interesting properties. Layered-silicate epoxy nanocomposites cured by traditional thermal cure processing were prepared, and the morphology was confirmed by the wide-angle x-ray diffraction, small-angle x-ray scattering and transmission electron microscopy. Layered-silicate epoxy nanocomposites could also be cured through e-beam curing. The small-angle x-ray scattering and transmission electron microscopy indicated that the e-beam-cured nanocomposites showed intercalated nanostructure. Dynamic mechanical analysis showed some improvement of the storage modulus for the nanocomposites with high T-9. C1 Univ Dayton, Res Inst, Dayton, OH 45469 USA. USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. RP Cheng, CG (reprint author), Univ Dayton, Res Inst, 300 Coll Pk, Dayton, OH 45469 USA. NR 16 TC 4 Z9 4 U1 0 U2 0 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0170-0839 J9 POLYM BULL JI Polym. Bull. PD MAR PY 2003 VL 49 IS 6 BP 473 EP 480 DI 10.1007/s00289-003-0128-1 PG 8 WC Polymer Science SC Polymer Science GA 660NJ UT WOS:000181839000010 ER PT J AU Huh, W Kumar, S Adams, WW AF Huh, W Kumar, S Adams, WW TI Microstructure analysis of high performance fibers in compression SO POLYMER ENGINEERING AND SCIENCE LA English DT Article ID RIGID-ROD POLYMER; MECHANICAL-PROPERTIES; STRENGTH; BEHAVIOR; TENSILE AB In order to understand the nature of kink band formation in high performance fibers, the compression behavior of pitch and PAN-based carbon fibers (P75S, T-50, T-300, and GY-70), and of polymeric fibers (DuPont Kevlar; PBZr; and PBO) was measured using a micro-scale compression apparatus in an optical microscope. With increasing compressive strain, kink band formation was observed and the number of kink bands per unit length (referred to as kink band density) was determined. By extrapolating to zero kink band density, the critical compressive strain for rigid-rod polymeric fibers was obtained and compared to that of the carbon fiber. Using the Euler buckling equation, a fundamental dimension of the buckling element for the compression of PBO and PBZT fibers was calculated to be a 0.42-0.57 mum diameter fibril, and not the smaller diameter microfibrils. C1 Soongsil Univ, Dept Environm Chem & Engn, Seoul 156743, South Korea. Georgia Inst Technol, Sch Text & Fiber Engn, Atlanta, GA 30332 USA. USAF, Mat & Mfg Directorate, AFRL ML, Wright Patterson AFB, OH 45433 USA. RP Adams, WW (reprint author), Rice Univ, Ctr Nanoscale Sci & Technol, Houston, TX 77005 USA. RI Kumar, Satish/F-7308-2011; Adams, Wade/A-7305-2010 NR 26 TC 3 Z9 3 U1 0 U2 3 PU SOC PLASTICS ENG INC PI BROOKFIELD PA 14 FAIRFIELD DR, BROOKFIELD, CT 06804-0403 USA SN 0032-3888 J9 POLYM ENG SCI JI Polym. Eng. Sci. PD MAR PY 2003 VL 43 IS 3 BP 684 EP 692 DI 10.1002/pen.10056 PG 9 WC Engineering, Chemical; Polymer Science SC Engineering; Polymer Science GA 654DT UT WOS:000181479300015 ER PT J AU Vasil'ev, SV Kuz'mina, MA Basiev, TT Hager, G AF Vasil'ev, SV Kuz'mina, MA Basiev, TT Hager, G TI Simulation and optimisation of the optically pumped HCl laser SO QUANTUM ELECTRONICS LA English DT Article DE molecular gas laser; mid-IR range; narrow-band optical pumping; mathematical model; numerical experiment ID CARBON-MONOXIDE LASER; COEFFICIENTS AB A mathematical model of an HCl gas laser optically pumped into the third vibrational overtone is developed. The results of numerical calculations are in good agreement with experimental data. The characteristics of the laser are studied and its parameters are optimised using numerical simulations. C1 Russian Acad Sci, AM Prokhorov Gen Phys Inst, Laser Mat & Technol Res Ctr, Moscow 119991, Russia. USAF, Res Lab, Directed Energy Laser Concepts, Kirtland AFB, NM 87117 USA. RP Vasil'ev, SV (reprint author), Russian Acad Sci, AM Prokhorov Gen Phys Inst, Laser Mat & Technol Res Ctr, Ul Vavilova 38, Moscow 119991, Russia. NR 12 TC 2 Z9 2 U1 1 U2 1 PU TURPION LTD PI LETCHWORTH PA TURPIN DISTRIBUTION SERVICES, BLACKHORSE RD, LETCHWORTH SG6 1HN, HERTS, ENGLAND SN 1063-7818 J9 QUANTUM ELECTRON+ JI Quantum Electron. PD MAR PY 2003 VL 33 IS 3 BP 201 EP 209 DI 10.1070/QE2003v033n03ABEH002387 PG 9 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 697FN UT WOS:000183931700004 ER PT J AU Basiev, TT Doroshenko, ME Kravtsov, SB Skornyakov, VV Zverev, PG Vasil'ev, SV Alimpiev, SS Nikiforov, SM Hager, G AF Basiev, TT Doroshenko, ME Kravtsov, SB Skornyakov, VV Zverev, PG Vasil'ev, SV Alimpiev, SS Nikiforov, SM Hager, G TI Emission of a molecular gas HCl laser at 4 mu m upon optical pumping by a tunable colour centre laser into the third vibrational overtone SO QUANTUM ELECTRONICS LA English DT Article DE molecular gas laser; mid-IR range; narrow-band optical pumping; single-frequency; tunable colour centre laser AB The parameters of an HCl gas laser optically excited into the third vibrational overtone are studied. The laser was excited by a single-frequency tunable F-2(-):LiF colour centre laser. Upon pumping the HCl gas into the (3-0) R(3) transition at 1.189 mum, lasing was observed at the (3-2) P(5) (1.189 mum) and (2-1) P(6) (3.769 mum) transitions, respectively. The experimental slope efficiency of the molecular laser achieved 2%. C1 Russian Acad Sci, AM Prokhorov Gen Phys Inst, Res Ctr Laser Mat & Technol, Moscow 119991, Russia. USAF, Res Lab, Directed Energy Laser Concepts, Kirtland AFB, NM 87117 USA. RP Basiev, TT (reprint author), Russian Acad Sci, AM Prokhorov Gen Phys Inst, Res Ctr Laser Mat & Technol, Ul Vavilova 38, Moscow 119991, Russia. RI Zverev, Petr/B-2363-2014; Alimpiev, Sergey/S-2353-2016 OI Alimpiev, Sergey/0000-0002-7124-7962 NR 8 TC 1 Z9 1 U1 0 U2 0 PU TURPION LTD PI LETCHWORTH PA TURPIN DISTRIBUTION SERVICES, BLACKHORSE RD, LETCHWORTH SG6 1HN, HERTS, ENGLAND SN 1063-7818 J9 QUANTUM ELECTRON+ JI Quantum Electron. PD MAR PY 2003 VL 33 IS 3 BP 210 EP 214 DI 10.1070/QE2003v033n03ABEH002388 PG 5 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 697FN UT WOS:000183931700005 ER PT J AU Enloe, CL Krause, LH Haaland, RK Patterson, TT Richardon, CE Lazidis, CC Whiting, RG AF Enloe, CL Krause, LH Haaland, RK Patterson, TT Richardon, CE Lazidis, CC Whiting, RG TI Miniaturized electrostatic analyzer manufactured using photolithographic etching SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID COMPACT AB A design for a new type of electrostatic analyzer, comprised of an arrangement of thin, patterned, conducting, and insulating plates and suitable for extreme miniaturization, is presented. The prototype, destined for use on a microsatellite-based experiment, is fabricated from photolithographically etched stainless steel plates with Teflon insulating layers. Results from tests on the prototype using a highly monoenergetic electron beam show that; as predicted, the device operates as a bandpass energy filter. The energy resolution and angular field of view of this design depend on the relative geometries of the apertures in the conducting plates and can be tailored to specific applications by varying these parameters. C1 USAF Acad, Dept Phys, HQ USAFA DFP, Colorado Springs, CO 80840 USA. RP Enloe, CL (reprint author), USAF Acad, Dept Phys, HQ USAFA DFP, Colorado Springs, CO 80840 USA. NR 8 TC 13 Z9 13 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2003 VL 74 IS 3 BP 1192 EP 1195 DI 10.1063/1.1540715 PN 1 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 655AZ UT WOS:000181530300004 ER PT J AU Antonsen, EL Burton, RL Spanjers, GG Engelman, SF AF Antonsen, EL Burton, RL Spanjers, GG Engelman, SF TI Herriott cell interferometry for millimeter-scale plasma measurements SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 14th Topical Conference on High-Temperature Plasma Diagnostics CY JUL 08-11, 2002 CL MADISON, WISCONSIN SP Univ Wisconsin Madison, Amer Phys Soc, Div Plasma Phys, US DOE, Off Fus Energy Sci & Defense Sci AB A Herriott cell consists of two concave mirrors positioned on opposite sides of plasma so as to create multiple laser paths through the plasma. Added to a traditional interferometry diagnostic, the Herriott cell multiplies the effective path length through the medium and thereby increases instrument resolution. Previous work used a planar geometry to validate the use of Herriott cells in interferometer applications where the numerous mirror reflections will significantly degrade the phase front quality. The current work extends the Herriott cell capability to a point configuration. In this geometry the multipass beams converge near a single point within the plasma, useful for performing density measurements in very small scale length plasmas. Ray tracing analysis is used to illustrate example measurement geometries attainable with the instrument. It is shown that the configuration results in two convergence points for the laser paths, which somewhat complicates the interpretation of the experimental data. In addition, the multitude of passes through the high density, small scale length passes increases the likelihood for deleterious refractive effects. The diagnostic capability is demonstrated with measurements of the electron and neutral densities in the plasma exhaust of a Micro Pulsed Plasma Thruster. The measurements are validated with similar, lower resolution measurements, obtained using a single-pass interferometer. (C) 2003 American Institute of Physics. C1 Univ Illinois, Urbana, IL 61801 USA. USAF, Res Lab, Propuls Directorate, Edwards AFB, CA 93524 USA. RP Antonsen, EL (reprint author), Univ Illinois, Urbana, IL 61801 USA. NR 8 TC 2 Z9 2 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 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2003 VL 74 IS 3 SI SI BP 1609 EP 1612 DI 10.1063/1.1527257 PN 2 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 655BB UT WOS:000181530500048 ER PT J AU Altrock, RC AF Altrock, RC TI A study of the rotation of the solar corona SO SOLAR PHYSICS LA English DT Article ID FE-XIV; HOLES AB Synoptic photoelectric observations of the coronal Fe XIV and Fe X emission lines at 530.3 nm and 637.4 nm, respectively, are analyzed to study the rotational behavior of the solar corona as a function of latitude, height, time and temperature between 1976 (1983 for Fe X) and 2001. An earlier similar analysis of the Fe XIV data at 1.15 R-circle dot over only one 11-year solar activity cycle (Sime, Fisher, and Altrock, 1989, Astrophys. J. 336, 454) found suggestions of solar-cycle variations in the differential (latitude-dependent) rotation. These results are tested over the longer epoch now available. In addition, the new Fe XIV 1.15 R-circle dot results are compared with those at 1.25 R-circle dot and with results from the Fe X line. I find that for long-term averages, both ions show a weakly-differential rotation period that may peak near 80degrees latitude and then decrease to the poles. However, this high-latitude peak may be due to sensing low-latitude streamers at higher latitudes. There is an indication that the Fe XIV rotation period may increase with height between 40degrees and 70degrees latitude. There is also some indication that Fe X may be rotating slower than Fe XIV in the mid-latitude range. This could indicate that structures with lower temperatures rotate at a slower rate. As found in the earlier study, there is very good evidence for solar-cycle-related variation in the rotation of Fe XIV. At latitudes up to about 60degrees, the rotation varies from essentially rigid (latitude-independent) near solar minimum to differential in the rising phase of the cycle at both 1.15 R-circle dot and 1.25 R-circle dot. At latitudes above 60degrees, the rotation at 1.15 R-circle dot appears to be nearly rigid in the rising phase and strongly differential near solar minimum, almost exactly out of phase with the low-latitude variation. C1 USAF, Res Lab, Space Vehicles Directorate, Natl Solar Observ Sacramento Peak, Sunspot, NM 88349 USA. RP Altrock, RC (reprint author), USAF, Res Lab, Space Vehicles Directorate, Natl Solar Observ Sacramento Peak, Sunspot, NM 88349 USA. NR 11 TC 18 Z9 19 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0038-0938 J9 SOL PHYS JI Sol. Phys. PD MAR PY 2003 VL 213 IS 1 BP 23 EP 37 DI 10.1023/A:1023204814099 PG 15 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 665RY UT WOS:000182136100002 ER PT J AU DelRaso, NJ Foy, BD Gearhart, JM Frazier, JM AF DelRaso, NJ Foy, BD Gearhart, JM Frazier, JM TI Cadmium uptake kinetics in rat hepatocytes: Correction for albumin binding SO TOXICOLOGICAL SCIENCES LA English DT Article DE cadmium; hepatocytes; in vitro; albumin; kinetics ID PRIMARY MONOLAYER-CULTURE; IN-VITRO; LIPID-PEROXIDATION; CELLS; LIVER; TRANSPORT; PROTEIN; ACCUMULATION; TOXICITY; SERUM AB The relationship between cytotoxicity and kinetics of cadmium uptake was investigated in primary rat hepatocyte cultures. Primary rat hepatocytes were exposed to cadmium concentrations ranging from 1.0 to 80 muM in albumin-free buffer or 32 to 8000 muM in buffer containing physiological concentrations of bovine serum albumin (600 muM) for 1 h, and cellular toxicity was observed at 23 h postexposure. Hepatocytes exposed to cadmium in the presence of albumin appeared less sensitive to cadmium toxicity when compared to cells exposed in the absence of albumin. The experimentally derived 23-h postexposure EC(50)s for hepatocytes exposed to cadmium in both presence and absence of albumin was 65.5 +/- 2.4 and 14.3 +/- 3.9 muM, respectively. A Scatchard plot of cadmium binding to albumin suggested two high-affinity binding sites. The observed uptake of cadmium by hepatocytes in the absence and presence of albumin consisted of a composite fast uptake rate and cell membrane association (Component I), and a slow, sustained uptake rate (Component II). Cadmium uptake rates in hepatocytes, based on total medium cadmium concentrations, indicated that Component II uptake rates were four times faster under albumin-free exposure conditions. However, when uptake rates were evaluated, based on the calculated equilibrium concentration of free cadmium in the exposure buffer, uptake rates in hepatocytes exposed in the presence of albumin were two times as fast. This faster cadmium uptake in the presence of albumin may result from diffusion-limited, nonequilibrium conditions occurring at the cell surface. C1 USAF, Operat Toxicol Branch, Human Effectiveness Directorate, Res Lab,HEST, Wright Patterson AFB, OH 45433 USA. Wright State Univ, Dept Phys, Dayton, OH 45435 USA. ManTech Environm Technol Inc, Dayton, OH 45433 USA. RP DelRaso, NJ (reprint author), USAF, Operat Toxicol Branch, Human Effectiveness Directorate, Res Lab,HEST, 2856 G St, Wright Patterson AFB, OH 45433 USA. NR 43 TC 34 Z9 35 U1 2 U2 7 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1096-6080 J9 TOXICOL SCI JI Toxicol. Sci. PD MAR PY 2003 VL 72 IS 1 BP 19 EP 30 DI 10.1093/toxsci/kfg009 PG 12 WC Toxicology SC Toxicology GA 651DN UT WOS:000181305300003 PM 12604831 ER PT J AU Gearhart, J Foy, B Soto, A Ebel, E Frazier, J AF Gearhart, J Foy, B Soto, A Ebel, E Frazier, J TI Parameterizaton of a biologically based kinetic (BBK) model of the isolated perfused rat liver (IPRL): Bromosulphophthalein (BSP) and cadmium (CD) kinetics. SO TOXICOLOGICAL SCIENCES LA English DT Meeting Abstract CT 42nd Annual Meeting of the Society-of-Toxicology CY MAR 09-13, 2003 CL SALT LAKE CITY, UTAH SP Soc Toxicol C1 AFRL, HEST, Dayton, OH USA. Wright State Univ, Dayton, OH 45435 USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1096-6080 J9 TOXICOL SCI JI Toxicol. Sci. PD MAR PY 2003 VL 72 SU S MA 177 BP 37 EP 37 PG 1 WC Toxicology SC Toxicology GA 654WB UT WOS:000181518500180 ER PT J AU Robinson, P Gearhart, JM Merrill, EA AF Robinson, P Gearhart, JM Merrill, EA TI Quantitative mechanistic modeling of mixture interactions: An approach for manganese (Mn) and organophosphates (OPs). SO TOXICOLOGICAL SCIENCES LA English DT Meeting Abstract CT 42nd Annual Meeting of the Society-of-Toxicology CY MAR 09-13, 2003 CL SALT LAKE CITY, UTAH SP Soc Toxicol C1 USAF, Res Lab, ManTech Geoctr Joint Venture, Dayton, OH USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1096-6080 J9 TOXICOL SCI JI Toxicol. Sci. PD MAR PY 2003 VL 72 SU S MA 185 BP 39 EP 39 PG 1 WC Toxicology SC Toxicology GA 654WB UT WOS:000181518500188 ER PT J AU Stevenson, MD Chan, V Gustafson, S Kelley-Loughnane, N Harker, B Wang, C Rudnicki, D Hussain, S Frazier, J AF Stevenson, MD Chan, V Gustafson, S Kelley-Loughnane, N Harker, B Wang, C Rudnicki, D Hussain, S Frazier, J TI Comparative study of DNA microarray data analysis: Principal component analysis verses fisher linear discriminant analysis. SO TOXICOLOGICAL SCIENCES LA English DT Meeting Abstract CT 42nd Annual Meeting of the Society-of-Toxicology CY MAR 09-13, 2003 CL SALT LAKE CITY, UTAH SP Soc Toxicol C1 USAF, Operat Toxicol Branch, Wright Patterson AFB, OH 45433 USA. ManTech Environm Technol Inc, USAF, Wright Patterson AFB, OH 45433 USA. Geocenters Inc, USAF, Wright Patterson AFB, OH USA. USAF, Inst Technol, Wright Patterson AFB, OH 45433 USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1096-6080 J9 TOXICOL SCI JI Toxicol. Sci. PD MAR PY 2003 VL 72 SU S MA 446 BP 92 EP 92 PG 1 WC Toxicology SC Toxicology GA 654WB UT WOS:000181518500449 ER PT J AU Yu, KO Clewell, RA Mahle, DA Gearhart, JM Mattie, DR AF Yu, KO Clewell, RA Mahle, DA Gearhart, JM Mattie, DR TI Iodine kinetic behavior in tissues of PND10 male and female pups following oral dosing. SO TOXICOLOGICAL SCIENCES LA English DT Meeting Abstract CT 42nd Annual Meeting of the Society-of-Toxicology CY MAR 09-13, 2003 CL SALT LAKE CITY, UTAH SP Soc Toxicol C1 USAF, Wright Patterson AFB, OH 45433 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1096-6080 J9 TOXICOL SCI JI Toxicol. Sci. PD MAR PY 2003 VL 72 SU S MA 708 BP 146 EP 146 PG 1 WC Toxicology SC Toxicology GA 654WB UT WOS:000181518500714 ER PT J AU Watson, AP Young, R Opresko, D Hauschild, V Leach, G Hinz, J Koller, L Bress, W Still, K Krewski, D Garrett, R Bakshi, K AF Watson, AP Young, R Opresko, D Hauschild, V Leach, G Hinz, J Koller, L Bress, W Still, K Krewski, D Garrett, R Bakshi, K TI Acute exposure guideline levels (AEGLs) for nerve agents. SO TOXICOLOGICAL SCIENCES LA English DT Meeting Abstract CT 42nd Annual Meeting of the Society-of-Toxicology CY MAR 09-13, 2003 CL SALT LAKE CITY, UTAH SP Soc Toxicol C1 Oak Ridge Natl Lab, Oak Ridge, TN USA. USA, CHPPM, Aberdeen Proving Ground, MD USA. USAF, AFIERA, Brooks AFB, TX USA. Environm Hlth & Toxicol, Corvallis, OR USA. Vermont Dept Hlth, Burlington, VT 05402 USA. USN, NHRC, Wright Patterson AFB, OH USA. Univ Ottawa, Ottawa, ON, Canada. CNR, Washington, DC 20418 USA. US EPA, Washington, DC 20460 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1096-6080 J9 TOXICOL SCI JI Toxicol. Sci. PD MAR PY 2003 VL 72 SU S MA 775 BP 160 EP 160 PG 1 WC Toxicology SC Toxicology GA 654WB UT WOS:000181518500781 ER PT J AU Garrett, CM Rogers, J McDougal, JN AF Garrett, CM Rogers, J McDougal, JN TI Gene expression in rat skin following dermal exposure to JP-8 jet fuel. SO TOXICOLOGICAL SCIENCES LA English DT Meeting Abstract CT 42nd Annual Meeting of the Society-of-Toxicology CY MAR 09-13, 2003 CL SALT LAKE CITY, UTAH SP Soc Toxicol C1 Geocenters Inc, Wright Patterson AFB, OH USA. Wright Patterson AFB, Wright Patterson AFB, OH USA. Wright State Univ, Dayton, OH 45435 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1096-6080 J9 TOXICOL SCI JI Toxicol. Sci. PD MAR PY 2003 VL 72 SU S MA 1272 BP 261 EP 261 PG 1 WC Toxicology SC Toxicology GA 654WB UT WOS:000181518501277 ER PT J AU Kelley-Loughnane, N Soto, A Hussain, SM Chan, V Rudnicki, DC Frazier, JM AF Kelley-Loughnane, N Soto, A Hussain, SM Chan, V Rudnicki, DC Frazier, JM TI The effect of glutathione regulation on gene expression in rat primary hepatocytes. SO TOXICOLOGICAL SCIENCES LA English DT Meeting Abstract CT 42nd Annual Meeting of the Society-of-Toxicology CY MAR 09-13, 2003 CL SALT LAKE CITY, UTAH SP Soc Toxicol C1 Geocenters Inc, Wright Patterson AFB, OH USA. Mantech Environm Technol Inc, Wright Patterson AFB, OH USA. AFRL, HEST, Operat Toxicol Branch, Wright Patterson AFB, OH USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1096-6080 J9 TOXICOL SCI JI Toxicol. Sci. PD MAR PY 2003 VL 72 SU S MA 1275 BP 262 EP 262 PG 1 WC Toxicology SC Toxicology GA 654WB UT WOS:000181518501280 ER PT J AU McDougal, JN Garrett, CM Rogers, JV AF McDougal, JN Garrett, CM Rogers, JV TI Gene expression in rat skin following cutaneous exposure to xylene, sodium lauryl sulfate and limonene. SO TOXICOLOGICAL SCIENCES LA English DT Meeting Abstract CT 42nd Annual Meeting of the Society-of-Toxicology CY MAR 09-13, 2003 CL SALT LAKE CITY, UTAH SP Soc Toxicol C1 Wright State Univ, Sch Med, Dayton, OH USA. Geo Centers Inc, Air Force Res Lab, Wright Patterson AFB, OH USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1096-6080 J9 TOXICOL SCI JI Toxicol. Sci. PD MAR PY 2003 VL 72 SU S MA 1838 BP 379 EP 379 PG 1 WC Toxicology SC Toxicology GA 654WB UT WOS:000181518501845 ER PT J AU Arfsten, DP Johnson, EW Thitoff, AR Brinkley, WW Schaeffer, D Still, KR AF Arfsten, DP Johnson, EW Thitoff, AR Brinkley, WW Schaeffer, D Still, KR TI Acute toxicity assessment of BreakFree CLP (R): A small arms cleaning compound. SO TOXICOLOGICAL SCIENCES LA English DT Meeting Abstract CT 42nd Annual Meeting of the Society-of-Toxicology CY MAR 09-13, 2003 CL SALT LAKE CITY, UTAH SP Soc Toxicol C1 USN, Hlth Res Ctr, Wright Patterson AFB, OH USA. Air Force Res Lab, Wright Patterson AFB, OH USA. Univ Illinois, Urbana, IL 61801 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1096-6080 J9 TOXICOL SCI JI Toxicol. Sci. PD MAR PY 2003 VL 72 SU S MA 1855 BP 382 EP 382 PG 1 WC Toxicology SC Toxicology GA 654WB UT WOS:000181518501862 ER PT J AU Cespedes, RD AF Cespedes, RD TI Videourodynamic analysis of the relationship of valsalva and cough leak point pressures in women with stress urinary incontinence - Editorial comment SO UROLOGY LA English DT Editorial Material C1 Wilford Hall USAF Med Ctr, Dept Urol, Lackland AFB, TX 78236 USA. RP Cespedes, RD (reprint author), Wilford Hall USAF Med Ctr, Dept Urol, Lackland AFB, TX 78236 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0090-4295 J9 UROLOGY JI Urology PD MAR PY 2003 VL 61 IS 3 BP 548 EP 549 DI 10.1016/S0090-4295(02)02501-3 PG 2 WC Urology & Nephrology SC Urology & Nephrology GA 662CJ UT WOS:000181928200015 ER PT J AU Gancarczyk, KJ Wu, HY McLeod, DG Kane, C Kusuda, L Lance, R Herring, J Foley, J Baldwin, D Bishoff, JT Soderdahl, D Moul, JW AF Gancarczyk, KJ Wu, HY McLeod, DG Kane, C Kusuda, L Lance, R Herring, J Foley, J Baldwin, D Bishoff, JT Soderdahl, D Moul, JW TI Using the percentage of biopsy cores positive for cancer, pretreatment PSA, and highest biopsy Gleason sum to predict pathologic stage after radical prostatectomy: The center for prostate disease research nomograms SO UROLOGY LA English DT Article ID ANTIGEN; MEN; COMBINATION; VALIDATION; SPECIMENS; INCREASE; SCORE AB Objectives. To develop probability nomograms to predict pathologic outcome at the time of radical prostatectomy (RP) on the basis of established prognostic factors and prostate biopsy quantitative histology. Methods. Using information from the database of the Center for Prostate Disease Research (CPDR), univariate and multivariate analyses were performed on 1510 men who had undergone transrectal ultrasound and biopsy for diagnosis and had radical prostatectomy as primary therapy, with variables of age, race, clinical stage, pretreatment prostate-specific antigen (PSA), biopsy Gleason sum, and percentage of biopsy cores positive for cancer (total number of cores positive for cancer divided by the total number of cores obtained). The percentages of biopsy cores positive were grouped as less than 30%, 30% to 59%, and greater than or equal to 60%. The three most significant variables were used to develop probability nomograms for pathologic stage. Results. PSA, biopsy Gleason sum, and percentage of cores positive were the three most significant independent predictors of pathologic stage. The assigned percentage of biopsy core-positive subgroups along with pretreatment PSA and highest Gleason sum were used to develop probability nomograms for pathologic stage. Conclusions. Pretreatment PSA, highest biopsy Gleason sum, and the percentage of cores positive for cancer are the most significant predictors for pathologic stage after radical prostatectomy. On the basis of these findings, CPDR probability nomograms were developed to predict pathologic outcome at the time of RP. Published by Elsevier Science Inc. C1 Uniformed Serv Univ Hlth Sci, Dept Surg, Ctr Prostate Dis Res, Rockville, MD 20852 USA. Walter Reed Army Med Ctr, Dept Surg, Serv Urol, Washington, DC 20307 USA. USN, Med Ctr, Dept Urol, San Diego, CA 92152 USA. USN, Med Ctr, Dept Urol, Portsmouth, VA USA. Madigan Army Med Ctr, Serv Urol, Tacoma, WA 98431 USA. Natl Naval Med Res Inst, Dept Urol, Bethesda, MD USA. Brooke Army Med Ctr, Serv Urol, San Antonio, TX USA. Malcolm Grow Med Ctr, Dept Urol, Andrews AFB, MD USA. Wilford Hall USAF Med Ctr, Dept Urol, San Antonio, TX 78236 USA. Eisenhower Army Med Ctr, Serv Urol, Augusta, GA USA. RP Moul, JW (reprint author), Uniformed Serv Univ Hlth Sci, Dept Surg, Ctr Prostate Dis Res, 1530 E Jefferson St, Rockville, MD 20852 USA. NR 31 TC 55 Z9 62 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0090-4295 J9 UROLOGY JI Urology PD MAR PY 2003 VL 61 IS 3 BP 589 EP 595 DI 10.1016/S0090-4925(02)02287-2 PG 7 WC Urology & Nephrology SC Urology & Nephrology GA 662CJ UT WOS:000181928200024 PM 12639653 ER PT J AU Burghardt, WF AF Burghardt, WF TI Behavioral considerations in the management of working dogs SO VETERINARY CLINICS OF NORTH AMERICA-SMALL ANIMAL PRACTICE LA English DT Article ID CLASSIFICATION; HYDROCHLORIDE; TEMPERAMENT; THERAPY AB This article is not intended as a comprehensive exploration of all issues related to the behavioral management of working dogs or as a survey of all manners of canine employment. Rather, it is one person's perspective into the challenges of managing a behavioral medicine program in a large-scale working dog program environment. The issues presented, however, are those that are commonly encountered when selecting, assessing, diagnosing, and treating working dogs. I hope this article provides insight not only into the author's program but also into some of the unique challenges in working with working dogs as well as some of the commonalities of this kind of behavioral practice with companion animal settings. C1 US Dept Def, Mil Working Dog Vet Serv, Lackland AFB, TX 78236 USA. RP Burghardt, WF (reprint author), US Dept Def, Mil Working Dog Vet Serv, 1219 Knight St, Lackland AFB, TX 78236 USA. EM Walter.Burghardt@Lackland.af.mil NR 59 TC 9 Z9 9 U1 3 U2 14 PU W B SAUNDERS CO-ELSEVIER INC PI PHILADELPHIA PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA SN 0195-5616 EI 1878-1306 J9 VET CLIN N AM-SMALL JI Vet. Clin. N. Am.-Small Anim. Pract. PD MAR PY 2003 VL 33 IS 2 BP 417 EP + AR PII S0195-5616(02)00133-X DI 10.1016/S0195-5616(02)00133-X PG 31 WC Veterinary Sciences SC Veterinary Sciences GA 661XR UT WOS:000181915600013 PM 12701519 ER PT J AU Kalns, JE Dick, EJ Scruggs, JP Kieswetter, K Wright, JK AF Kalns, JE Dick, EJ Scruggs, JP Kieswetter, K Wright, JK TI Hyperbaric oxygen treatment prevents up-regulation of angiogenesis following partial-thickness skin grafts in the pig SO WOUND REPAIR AND REGENERATION LA English DT Article ID STIMULATION; THERAPY; CELLS AB We hypothesized that hyperbaric oxygen treatment (HBO) would reduce neovascularization following partial-thickness skin grafting in the Yucatan pig. Results show that capillary density 4 days postgraft is increased twofold in grafts not treated with HBO, compared to normal, ungrafted skin or skin grafts from pigs treated with HBO, p < 0.05. Similarly, the expression of vascular endothelial growth factor, a growth factor associated with neovascularization, was also reduced by HBO. Cell density in the graft boundary increased gradually after grafting, reaching a maximum 2.7-fold increase, relative to normal skin, at day 4, p < 0.05. Cell nuclei positive for proliferating cell nuclear antigen, a marker of proliferation, increased threefold by day 2, p < 0.05, and then declined to normal levels by day 7. HBO had no effect on cell density or proliferation in the boundary region or on shear strength of the graft. In the epidermis, proliferation declined 80% 2 days after grafting and then returned to levels observed in normal skin by day 4, p < 0.05; however, in pigs treated with HBO, we observed no decline in proliferation. These findings confirm the hypothesis that HBO reduces neovascularization in the partial-thickness skin graft while preserving regenerative capacity in the graft boundary and normal proliferative capacity of the epidermis. C1 USAF, Sch Aerosp Med, FEH, Brooks AFB, TX 78235 USA. USAF, Davis Hyperbar Lab, Res Lab, Brooks AFB, TX USA. USAF, Vet Sci Branch, Res Lab, Brooks AFB, TX USA. DPT Labs, San Antonio, TX USA. RP Kalns, JE (reprint author), USAF, Sch Aerosp Med, FEH, 2602 Louis Bauer Dr,Bldg 775, Brooks AFB, TX 78235 USA. NR 25 TC 8 Z9 9 U1 0 U2 0 PU BLACKWELL PUBLISHING INC PI MALDEN PA 350 MAIN ST, MALDEN, MA 02148 USA SN 1067-1927 J9 WOUND REPAIR REGEN JI Wound Repair Regen. PD MAR-APR PY 2003 VL 11 IS 2 BP 139 EP 144 DI 10.1046/j.1524-475X.2003.11210.x PG 6 WC Cell Biology; Dermatology; Medicine, Research & Experimental; Surgery SC Cell Biology; Dermatology; Research & Experimental Medicine; Surgery GA 654GJ UT WOS:000181485600008 PM 12631302 ER PT J AU Shin, DH Kim, I Kim, J Kim, YS Semiatin, SL AF Shin, DH Kim, I Kim, J Kim, YS Semiatin, SL TI Microstructure development during equal-channel angular pressing of titanium SO ACTA MATERIALIA LA English DT Article DE equal-channel angular pressing; titanium; twinning; slip; TEM ID SEVERE PLASTIC-DEFORMATION; CLOSE-PACKED METALS; LOW-CARBON STEEL; GRAIN-REFINEMENT; MAGNESIUM ALLOY; EXTRUSION; SUPERPLASTICITY; TEMPERATURES; WORKABILITY; BOUNDARIES AB The development of microstructure during equal-channel angular pressing (ECAP) of commercial-purity titanium was investigated to establish the mechanisms of grain refinement and strain accommodation. Samples were deformed at 623 K via three different processing routes: A, B, and C. After the first pass, transmission electron microscopy (TEM) revealed that the strain imposed by pressing was accommodated mainly by {10 (1) over bar1} deformation twinning. During the second pass, the deformation mechanism changed to dislocation slip on a system which depended on the specific route. For route C, prism (a) and pyramidal (c + a) slip occurred within alternating twin bands. For route B, prism a slip was the main deformation mechanism. For route A, deformation was controlled by basal a slip and micro-twinning in alternating twin bands. The variation in deformation behavior was interpreted in terms of the texture formed during the first pass and the Schmid factors for slip during subsequent deformation. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. C1 Hanyang Univ, Dept Met & Mat Sci, Ansan 425791, Kyunggi Do, South Korea. Hongik Univ, Dept Mat Sci & Engn, Seoul 121791, South Korea. USAF, Res Lab, Mat & Mfg Directorate, MLLM, Wright Patterson AFB, OH 45433 USA. RP Shin, DH (reprint author), Hanyang Univ, Dept Met & Mat Sci, Ansan 425791, Kyunggi Do, South Korea. RI SEMIATIN, SHELDON/E-7264-2017 NR 39 TC 143 Z9 161 U1 3 U2 47 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD FEB 25 PY 2003 VL 51 IS 4 BP 983 EP 996 DI 10.1016/S1359-6454(02)00501-3 PG 14 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 648EY UT WOS:000181137700008 ER PT J AU Ivasishin, OM Shevchenko, SV Vasiliev, NL Semiatin, SL AF Ivasishin, OM Shevchenko, SV Vasiliev, NL Semiatin, SL TI 3D Monte-Carlo simulation of texture-controlled grain growth SO ACTA MATERIALIA LA English DT Article DE grain growth; texture; Potts model ID STRUCTURE-ENERGY CORRELATION; MICROSTRUCTURAL EVOLUTION; COMPUTER-SIMULATION; BOUNDARY ENERGIES; FCC METALS; MODELS AB A three-dimensional (3D) Monte-Carlo (MC) routine was developed to quantify the interaction of grain growth and texture development during annealing. The program included special software to enable the input of the initial grain structure and texture and incorporated a description of the misorientation-dependence of the grain-boundary mobility. Outputs from the model quantified the evolving texture in terms of pole figures or crystallite orientation distribution functions and statistics on the grain structure such as the grain-size distribution and boundary-misorientation distribution function. The MC routine was applied to establish grain growth and texture development in materials with random or strongly textured starting conditions and isotropic or anisotropic grain-boundary mobility. Depending on the starting condition and material properties, normal grain growth or a behavior characterized by alternating cycles of fast and slow grain growth was predicted. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. C1 Inst Phys Met, UA-03142 Kiev, Ukraine. USAF, Res Lab, AFRL, ML, Wright Patterson AFB, OH 45433 USA. RP Ivasishin, OM (reprint author), Inst Phys Met, 36 Vernadsky Str, UA-03142 Kiev, Ukraine. RI SEMIATIN, SHELDON/E-7264-2017 NR 32 TC 38 Z9 40 U1 0 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD FEB 25 PY 2003 VL 51 IS 4 BP 1019 EP 1034 DI 10.1016/S1359-6454(02)00505-0 PG 16 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 648EY UT WOS:000181137700011 ER PT J AU Wen, YH Simmons, JP Shen, C Woodward, C Wang, Y AF Wen, YH Simmons, JP Shen, C Woodward, C Wang, Y TI Phase-field modeling of bimodal particle size distributions during continuous cooling SO ACTA MATERIALIA LA English DT Article DE phase-field approach; bimodal particle size distributions; continuous cooling; Ni-base alloy ID ORTHORHOMBIC TRANSFORMATION; MICROSTRUCTURAL EVOLUTION; ORDERED INTERMETALLICS; COMPUTER-SIMULATION; AL-ALLOYS; NUCLEATION; PRECIPITATION; GROWTH AB Microstructures in Nickel-base alloys typically contain a two-phase mixture of gamma/gamma'. The microstructure having a bimodal size distribution of gamma' is of particular interest because it has important property consequences [1]. In this paper, the phase-field method with an explicit nucleation algorithm is employed to investigate the microstructural development during a continuous cooling with various cooling rates. It is demonstrated that bimodal particle size distributions can be achieved at an intermediate cooling rate due to a coupling between diffusion and undercooling, in which the system experiences two peaks of well-isolated nucleation events. It is suggested that this is caused by soft impingement, followed by a renewal of driving force for nucleation, followed by a subsequent soft impingement. Under very high cooling rates, the microstructure becomes unimodal, because undercooling always outruns diffusion and the microstructure never reaches soft impingement. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. C1 Universal Energy Syst Inc, Dayton, OH 45432 USA. USAF, Res Lab, AFRL, MLLM, Wright Patterson AFB, OH 45433 USA. Ohio State Univ, Columbus, OH 43210 USA. RP Wen, YH (reprint author), Universal Energy Syst Inc, Dayton, OH 45432 USA. RI Wang, Yunzhi/B-2557-2010 NR 27 TC 61 Z9 63 U1 1 U2 20 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD FEB 25 PY 2003 VL 51 IS 4 BP 1123 EP 1132 DI 10.1016/S1359-6454(02)00516-5 PG 10 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 648EY UT WOS:000181137700020 ER PT J AU Zhang, XD Bonniwell, P Fraser, HL Baeslack, WA Evans, DJ Ginter, T Bayha, T Cornell, B AF Zhang, XD Bonniwell, P Fraser, HL Baeslack, WA Evans, DJ Ginter, T Bayha, T Cornell, B TI Effect of heat treatment and silicon addition on the microstructure development of Ti-6Al-2Cr-2Mo-2Sn-2Zr alloy SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE titanium; microstructure; phase equilibria; intermetallic; optical microscopy ID TI-6-22-22 ALLOY; PHASE AB Microstructural development of Ti-6-22-22-0.22Si and Ti-6-22-22-0.02Si after beta, alpha/beta, and aging heat treatment was investigated. Primary alpha morphology was determined following beta heat treatment. Cooling rate from beta treatment was found significantly influence the HCP transformation products, ranging from principally alpha-prime martensite and acicular alpha at rates exceeding 5.5 degreesC s(-1), to mixtures of Widmanstatten and colony alpha at intermediate cooling rate, to colony alpha at the slowest rates of 0.27 and 0.055 degreesC s(-1). Varying cooling rates from the alpha/beta heat treatment significantly influenced the volume fraction of retained beta phase and secondary alpha in the microstructure. Higher cooling rate resulted in greater retention of the beta phase and transformation of the phase into secondary alpha upon aging. This higher amount of fine, secondary alpha phase promoted higher strength and lower toughness. Alpha/beta heat treatment temperature significantly influenced the heat treatment response of the microstructure. High heat treatment temperatures promoted greater amounts of retained beta with fine, transformed alpha in the final microstructures. Lower alpha/beta heat treatment temperatures promoted retained beta microstructures which were less responsive to aging treatment. Aging treatment promoted decomposition of retained beta phase, particularly in larger retained-beta regions that exhibited lower stability. Microstructural characteristics of heat treated high and low Si alloys appears identical in most cases. However, very fine silicides were observed in the high Si alloy after aging at 593 degreesC, which may have a significant effect on fracture toughness. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Ohio State Univ, Columbus, OH 43210 USA. USAF, Res Lab, Mat & Mfg Directorate, Dayton, OH 45433 USA. Lockheed Martin Aeronaut Syst, Marietta, GA 30063 USA. RP Zhang, XD (reprint author), Agere Syst, 4E-143D, Breinigsville, PA 18031 USA. NR 11 TC 27 Z9 28 U1 1 U2 8 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD FEB 25 PY 2003 VL 343 IS 1-2 BP 210 EP 226 AR PII S06921-5093(02)00381-7 DI 10.1016/S0921-5093(02)00381-7 PG 17 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 626XP UT WOS:000179899400027 ER PT J AU Pedersen, TR McCarrick, M Gerken, E Selcher, C Sentman, D Carlson, HC Gurevich, A AF Pedersen, TR McCarrick, M Gerken, E Selcher, C Sentman, D Carlson, HC Gurevich, A TI Magnetic zenith enhancement of HF radio-induced airglow production at HAARP SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID CAVITIES AB Airglow production at various beam positions relative to the magnetic field was investigated as part of an optics campaign at HAARP in February 2002. Strong emissions up to several hundred Rayleigh at 630.0 nm and more than 50 R at 557.7 nm were produced in a small spot approximately 6degrees in diameter located near the magnetic zenith when the transmitter beam was directed up the magnetic field. This effect was observed hundreds of times over a wide range of frequencies and ionospheric conditions. The spot at HAARP appears on average just equatorward of the nominal magnetic field direction, deflects somewhat toward the beam center when the beam is scanned, and varies slightly in size with transmitter frequency. Red-to-green ratios as low as 3 were observed, with both wavelengths showing significant onset delay. Identifiable enhancements in red-line emission were produced down to 2 MW ERP in a power ramp experiment. C1 USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. Adv Power Technol Inc, Washington, DC USA. Stanford Univ, STAR Lab, Stanford, CA 94305 USA. USN, Res Lab, Washington, DC 20375 USA. Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA. USAF, Off Sci Res, Arlington, VA USA. PN Lebedev Phys Inst, Moscow 117924, Russia. RP Pedersen, TR (reprint author), USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. RI Gurevich, Aleksandr/K-8668-2015 OI Gurevich, Aleksandr/0000-0003-1125-9774 NR 11 TC 51 Z9 54 U1 0 U2 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD FEB 22 PY 2003 VL 30 IS 4 AR 1169 DI 10.1029/2002GL016096 PG 4 WC Geosciences, Multidisciplinary SC Geology GA 663AT UT WOS:000181983400001 ER PT J AU Kahler, SW Reames, DV AF Kahler, SW Reames, DV TI Solar energetic particle production by coronal mass ejection driven shocks in solar fast-wind regions SO ASTROPHYSICAL JOURNAL LA English DT Article DE solar wind; Sun : coronal mass ejections (CMEs) Sun : particle emission ID ELEMENT ABUNDANCES; EMPIRICAL-MODEL; ULYSSES; POLAR; ACCELERATION; SOHO; INSTRUMENT; SPACECRAFT; TRANSPORT; SPECTRA AB Gradual solar energetic particle (SEP) events at 1 AU are produced by coronal/interplanetary shocks driven by coronal mass ejections (CMEs). Fast (v(CME) greater than or similar to 900 km s(-1)) CMEs might produce stronger shocks in solar slow-wind regions, where the flow and fast-mode MHD wave speeds are low, than in fast-wind regions, where those speeds are much higher. At 1 AU the O+7/O+6 ratios distinguish between those two kinds of wind streams. We use the 20 MeV proton event intensities from the EPACT instrument on Wind, the associated CMEs observed with the LASCO coronagraph on SOHO, and the ACE SWICS solar wind values of O+7/O+6 to look for variations of peak SEP intensities as a function of O+7/O+6. No significant dependence of the SEP intensities on O+7/O+6 is found for either poorly connected or well-connected CME source regions or for different CME speed ranges. However, in the 3 yr study period we find only five cases of SEP events in fast wind, defined by regions of O+7/O+6<0.15. We suggest that in coronal holes SEP acceleration may take place only in the plume regions, where the flow and Alfven speeds are low. A broad range of angular widths are associated with fast (v(CME) &GE; 900 km s(-1)) CMEs, but we find that no fast CMEs with widths less than 60&DEG; are associated with SEP events. On the other hand, nearly all fast halo CMEs are associated with SEP events. Thus, the CME widths are more important in SEP production than previously thought, but the speed of the solar wind source regions in which SEPs are produced may not be a factor. C1 USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. RP Kahler, SW (reprint author), USAF, Res Lab, Space Vehicles Directorate, 29 Randolph Rd, Hanscom AFB, MA 01731 USA. NR 56 TC 42 Z9 43 U1 1 U2 3 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD FEB 20 PY 2003 VL 584 IS 2 BP 1063 EP 1070 DI 10.1086/345780 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 643WG UT WOS:000180884100050 ER PT J AU Kondo, Y Toon, OB Irie, H Gamblin, B Koike, M Takegawa, N Tolbert, MA Hudson, PK Viggiano, AA Avallone, LM Hallar, AG Anderson, BE Sachse, GW Vay, SA Hunton, DE Ballenthin, JO Miller, TM AF Kondo, Y Toon, OB Irie, H Gamblin, B Koike, M Takegawa, N Tolbert, MA Hudson, PK Viggiano, AA Avallone, LM Hallar, AG Anderson, BE Sachse, GW Vay, SA Hunton, DE Ballenthin, JO Miller, TM TI Uptake of reactive nitrogen on cirrus cloud particles in the upper troposphere and lowermost stratosphere SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID CHEMISTRY MODEL; NITRIC-ACID; WAVE-CLOUD; ICE; TEMPERATURES; HNO3 AB NOy ( total reactive nitrogen) contained in ice particles was measured on board the NASA DC-8 aircraft in the Arctic in January and March 2000. During some of the flights, the DC-8 encountered widespread cirrus clouds. Large quantities of ice particles were observed at 8-12 km and particulate NOy showed large increases. The data indicate that the amount of NOy covering the cirrus ice particles strongly depended on temperature. Similar measurements were made in the upper troposphere over the tropical Pacific Ocean in August-September 1998 and 1999. The data obtained in the Arctic and tropics show very limited uptake of NOy on ice at temperatures above 215 K. C1 Univ Tokyo, Adv Sci & Technol Res Ctr, Tokyo 1538904, Japan. Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA. Natl Inst Environm Studies, Tsukuba, Ibaraki, Japan. Univ Tokyo, Dept Earth & Planetary Sci, Tokyo 1130033, Japan. Univ Colorado, Dept Chem & Biochem, CIRES, Boulder, CO 80309 USA. USAF, Res Lab, VSBXT, Hanscom AFB, MA 01731 USA. NASA, Div Atmospher Sci, Langley Res Ctr, Hampton, VA 23681 USA. RP Kondo, Y (reprint author), Univ Tokyo, Adv Sci & Technol Res Ctr, Tokyo 1538904, Japan. RI Koike, Makoto/F-4366-2011; Kondo, Yutaka/D-1459-2012; Hallar, Anna Gannet/I-9104-2012 OI Hallar, Anna Gannet/0000-0001-9972-0056 NR 17 TC 28 Z9 29 U1 0 U2 9 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD FEB 18 PY 2003 VL 30 IS 4 AR 1154 DI 10.1029/2002GL016539 PG 4 WC Geosciences, Multidisciplinary SC Geology GA 663AN UT WOS:000181982800003 ER PT J AU Nicolaou, PD Semiatin, SL AF Nicolaou, PD Semiatin, SL TI Modeling the effect of cavity shape on cavitation behavior during hot working SO SCRIPTA MATERIALIA LA English DT Article DE cavitation; cavity nucleation; growth; coalescence; plastic deformation ID COPPER ALLOY; DEFORMATION; COALESCENCE; FRACTURE AB The effect of cavity shape on cavitation behavior was established using a mesoscale-modeling approach for the two limiting cases of (i) the growth and coalescence of an initial cavity array with no nucleation of new cavities and (ii) the growth and coalescence of cavities including continuous nucleation. The simulations, conducted dealt with two-dimensional situations. It was also assumed that the cavity aspect ratio remained constant throughout the deformation-and-cavitation process. Simulation predictions revealed that the average cavity size, as a function of strain, is essentially independent of whether the cavities were spherical or elliptical. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. C1 AFRL MLLM, Mat & Mfg Directorate, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA. RP Nicolaou, PD (reprint author), Silver & Baryte Ores Min Co, Bauxite Div, SA,21A Amerikis Str, Athens 10672, Greece. RI SEMIATIN, SHELDON/E-7264-2017 NR 11 TC 3 Z9 3 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD FEB 17 PY 2003 VL 48 IS 4 BP 345 EP 349 AR PII S1359-6462(02)00448-7 DI 10.1016/S1359-6462(02)00448-7 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 644EE UT WOS:000180904300005 ER PT J AU Williamson, JM DeJoseph, CA AF Williamson, JM DeJoseph, CA TI Determination of gas temperature in an open-air atmospheric pressure plasma torch from resolved plasma emission SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID NITROGEN; DISCHARGES; HYDROGEN AB The resolved emission spectrum of an open-air atmospheric pressure plasma torch was recorded with a 0.5 m spectrometer and CCD camera. The plasma emission under these conditions was found to be dominated by continuum radiation and emission from species, which obscured large portions of the N-2 second positive emission spectrum. Despite these difficulties, the gas temperature of the torch could be determined from a fit of partially resolved N-2(+) first negative vibrational transitions and a blackbody fit to the continuum radiation. The vibrational temperature, determined from a Boltzmann plot, was 4300+/-900 K while the blackbody radiation temperature was 4400+/-400 K. To check these gas temperature determinations, measured spectra over selected spectral regions were compared with spectral simulations using N-2(+) first negative emission, N-2 second positive emission, and a blackbody. Best agreement between measured and simulated spectra was with blackbody temperature, rotational temperature, and vibrational temperature set to 4400 K. (C) 2003 American Institute of Physics. C1 Innovat Sci Solut Inc, Dayton, OH 45440 USA. USAF, Res Lab, Wright Patterson AFB, OH 45433 USA. RP Williamson, JM (reprint author), Innovat Sci Solut Inc, 2766 Indian Ripple Rd, Dayton, OH 45440 USA. NR 19 TC 13 Z9 13 U1 1 U2 8 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 FEB 15 PY 2003 VL 93 IS 4 BP 1893 EP 1898 DI 10.1063/1.1536736 PG 6 WC Physics, Applied SC Physics GA 640RU UT WOS:000180702400008 ER PT J AU Michalek, JE Ketchum, NS Tripathi, RC AF Michalek, JE Ketchum, NS Tripathi, RC TI Diabetes mellitus and 2,3,7,8-tetrachlorodibenzo-p-dioxin elimination in veterans of operation ranch hand SO JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH-PART A LA English DT Article ID SERUM; DIOXIN; TCDD AB Using multivariate statistical models, no significant relationship was found between the rate of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) elimination and the occurrence or time to onset of diabetes in 343 veterans of Operation Ranch Hand, the unit responsible for the aerial spraying of Agent Orange and other TCDD-contaminated herbicides during the Vietnam War. Without adjustment for age, body mass index, family history of diabetes, and smoking history, the time to onset of diabetes decreased and the risk of diabetes increased with a diminished elimination rate. However, after adjustment, diabetes time to onset and occurrence were not significantly associated with TCDD elimination. Analyses of covariance found no significant difference between the average elimination rates of diabetic and nondiabetic veterans, without or with adjustment for risk factors. To our knowledge, this is the only study to date to examine TCDD elimination and diabetes. C1 USAF, Res Lab, Brooks AFB, TX USA. Univ Texas, Dept Management Sci & Stat, San Antonio, TX 78285 USA. RP Michalek, JE (reprint author), 2655 Flight Nurse, Brooks AFB, TX 78235 USA. NR 11 TC 32 Z9 33 U1 0 U2 3 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 1528-7394 J9 J TOXICOL ENV HEAL A JI J. TOXICOL. ENV. HEALTH PT A PD FEB 14 PY 2003 VL 66 IS 3 BP 211 EP 221 DI 10.1080/15287390390155895 PG 11 WC Environmental Sciences; Public, Environmental & Occupational Health; Toxicology SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Toxicology GA 644AY UT WOS:000180896800001 PM 12521668 ER PT J AU Bingham, PT AF Bingham, PT TI Revise perception of foes SO AVIATION WEEK & SPACE TECHNOLOGY LA English DT Letter C1 USAF, Melbourne, FL USA. RP Bingham, PT (reprint author), USAF, Melbourne, FL 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 USA SN 0005-2175 J9 AVIAT WEEK SPACE TEC JI Aviat. Week Space Technol. PD FEB 10 PY 2003 VL 158 IS 6 BP 6 EP 6 PG 1 WC Engineering, Aerospace SC Engineering GA 645JC UT WOS:000180971600002 ER PT J AU Qian, XM Zhang, T Chiu, YH Levandier, DJ Miller, JS Dressler, RA Ng, CY AF Qian, XM Zhang, T Chiu, YH Levandier, DJ Miller, JS Dressler, RA Ng, CY TI Rovibrational state-selected study of H-2(+) (X,nu(+)=0-17, N+=1)+Ar using the pulsed field ionization-photoelectron-secondary ion coincidence scheme SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID SYNCHROTRON-RADIATION; MOLECULE REACTIONS AB A high-resolution pulsed field ionization photoelectron-secondary ion coincidence (PFI-PESICO) method has been developed for absolute cross section measurements of state-selected ion-molecule reactions. Employing this new PFI-PESICO scheme, we have measured rovibrational-state-selected absolute cross sections for the reaction of H-2(+)(X,nu(+)=0-17, N+=1)+Ar at the center-of-mass collision energies of 1.1 and 2.4 eV. The nu(+)=17 state is the second to the last vibrational level of H-2(+)(X), which lies a mere 0.03 eV below the H-2(+)(X) dissociation limit. The absolute cross sections observed for the formation of Ar+ and ArH+ [sigma(v+)(Ar++ArH+)] from H-2(+)(X,nu(+)=0-4, N+=1) are consistent with previous experiments, exhibiting strong enhancement of the reaction cross section for nu(+)=2. However, the sigma(v+)(Ar++ArH+) values for H-2(+)(X,nu(+)=5-14, N+=1)+Ar are found to be nearly constant. The drop in sigma(v+)(Ar++ArH+) observed for H-2(+)(X,nu(+)=15-17, N+=1)+Ar is attributed to the further dissociation of product ArH+. (C) 2003 American Institute of Physics. C1 Univ Calif Davis, Dept Chem, Davis, CA 95616 USA. Boston Coll, Inst Sci Res, Newton, MA 02159 USA. USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. RP Univ Calif Davis, Dept Chem, Davis, CA 95616 USA. EM Rainer.Dressler@hanscom.af.mil; cyng@chem.ucdavis.edu NR 18 TC 19 Z9 20 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD FEB 8 PY 2003 VL 118 IS 6 BP 2455 EP 2458 DI 10.1063/1.1542884 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 638HD UT WOS:000180564800002 ER PT J AU Nicolaou, PD Semiatin, SL AF Nicolaou, PD Semiatin, SL TI An experimental and theoretical investigation of the influence of stress state on cavitation during hot working SO ACTA MATERIALIA LA English DT Article DE ductile fracture; stress triaxiality; cavity growth rate; hot working ID SUPERPLASTIC DEFORMATION; CAVITY COALESCENCE; TENSION TEST; BEHAVIOR; NUCLEATION; ALLOYS; GROWTH AB The effect of stress triaxiality on cavity growth during necking in the hot tension test was investigated and quantified. Experimentally, Ti-6Al-4V specimens deformed over a range of temperatures and strain rates developed necks of different sharpness and thus of varying levels of the ratio of hydrostatic to effective stress. The magnitude of these stresses was calculated using the classical work of Bridgman. Metallographic examination revealed that the average cavity size, cavity population, and cavity volume fraction were higher in the central region of each specimen as compared to that in the edge region. An analytical model was developed to separate the effects of cavity nucleation and coalescence from the apparent cavity growth rate and thus to determine the individual cavity growth rate at the two locations. The ratio of the cavity growth rate at the center of the specimen to that of the edge was correlated to the stress state (i.e., ratio of mean to effective stress) and compared to predictions derived from the work of Rice and Tracey and of Pilling and Ridley. These comparisons demonstrated that model predictions based on the Pilling-and-Ridley work provided good agreement with observations at low levels of hydrostatic stress, while the Rice-and-Tracey approach was better at higher levels. In addition, it was established that the analysis could be applied over a wider range of processing and material parameters than that originally assumed by Pilling and Ridley and Rice and Tracey. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved. C1 Silver & Baryte, Athens 10672, Greece. USAF, Res Lab, Mat & Mfg Directorate, AFRL,MLLM, Wright Patterson AFB, OH 45433 USA. RP Nicolaou, PD (reprint author), Silver & Baryte, 21 Amerikis Str, Athens 10672, Greece. RI SEMIATIN, SHELDON/E-7264-2017 NR 22 TC 15 Z9 15 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD FEB 7 PY 2003 VL 51 IS 3 BP 613 EP 623 DI 10.1016/S1359-6454(02)00441-X PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 645RD UT WOS:000180991300003 ER PT J AU Jakubiak, R Bunning, TJ Vaia, RA Natarajan, LV Tondiglia, VP AF Jakubiak, R Bunning, TJ Vaia, RA Natarajan, LV Tondiglia, VP TI Electrically switchable, one-dimensional polymeric resonators from holographic photopolymerization: A new approach for active photonic bandgap materials SO ADVANCED MATERIALS LA English DT Article ID DISTRIBUTED-FEEDBACK; RANDOM LASER; CRYSTALS; EMISSION AB Stimulated emission is demonstrated by optically pumping chromophores within the liquid-crystal domains of 1D bandgap structures that are derived from holographic polymer-dispersed liquid-crystal (H-PDLC) gratings (see Figure). Electrically switchable laser resonance is also possible using the H-PDLC, since applying an electric field across the grating aligns the directors of the liquid crystal, diminishing the refractive index profile and, consequently, the lasing action. C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Sci Applicat Int Corp, Dayton, OH 45431 USA. RP Vaia, RA (reprint author), USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. NR 27 TC 111 Z9 112 U1 2 U2 30 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0935-9648 J9 ADV MATER JI Adv. Mater. PD FEB 5 PY 2003 VL 15 IS 3 BP 241 EP + DI 10.1002/adma.200390056 PG 5 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 648FM UT WOS:000181139200014 ER PT J AU Harruff, BA Bunker, CE AF Harruff, BA Bunker, CE TI Spectral properties of AOT-protected CdS nanoparticles: Quantum yield enhancement by photolysis SO LANGMUIR LA English DT Article ID NATURAL RADIATIVE LIFETIMES; COLLOIDAL SEMICONDUCTORS; CADMIUM-SULFIDE; ANTHRACENE-DERIVATIVES; PARTICLES; CLUSTERS; LUMINESCENCE; NANOCRYSTALS; EMISSION; PHOTOCHEMISTRY AB Absorption and steady-state emission spectra and time-resolved luminescence decays have been recorded for CdS nanoparticles prepared using the reverse-micelle method. Spectra were collected in hexane solution, with the surfactant AOT as stabilizer. The emission spectra of these particles are characteristic of trap-state emissions, being broad and red-shifted from the absorption-edge onset. Quantum yields for CdS particles prepared with w(0)'s of 3-7 (w(0) = [H2O]/[AOT]) are low (-1-4%) and are not size dependent. CdS nanoparticles with w(0) = 4 were irradiated at the maximum of the first absorption peak. Irradiation resulted in a red shift and overall decrease in intensity of the absorption spectra, a red shift and increase in intensity of the emission spectra, an increase in the apparent lifetimes, and an increase in the quantum efficiency. Final quantum yields range from similar to9 to 13%. C1 USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA. RP Bunker, CE (reprint author), USAF, Res Lab, Prop Directorate, Wright Patterson AFB, OH 45433 USA. NR 43 TC 54 Z9 54 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD FEB 4 PY 2003 VL 19 IS 3 BP 893 EP 897 DI 10.1021/la026438x PG 5 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 641GN UT WOS:000180737100063 ER PT J AU Lambert, CE AF Lambert, CE TI The cruise missile conundrum SO AEROSPACE AMERICA LA English DT Editorial Material C1 USAF, Missile Def, Elmendorf AFB, AK USA. USAF, Alaskan Command, Elmendorf AFB, AK USA. RP Lambert, CE (reprint author), USAF, Missile Def, Elmendorf AFB, AK USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 USA SN 0740-722X J9 AEROSPACE AM JI Aerosp. Am. PD FEB PY 2003 VL 41 IS 2 BP 39 EP 42 PG 4 WC Engineering, Aerospace SC Engineering GA 641VH UT WOS:000180767400016 ER PT J AU Parker, JH Duncan, BD AF Parker, JH Duncan, BD TI Index-matched boundary techniques for the elimination of acoustical resonances SO AIAA JOURNAL LA English DT Article AB We extend the principle of optical index of refraction to apply the concept of acoustical index for transverse acoustical wave propagation in strings. The relationship between acoustical index and mass density of the acoustic material is developed. With this theoretical link established, classic index-matching techniques are explored at acoustical boundaries. Proper selection of boundary interface segments leads to the elimination of resonant vibrational modes that occur in rigidly supported strings, while maintaining the nonresonant vibration response. C1 USAF, Sensors Directorate, AFRL, SNJT, Wright Patterson AFB, OH 45433 USA. Univ Dayton, Dayton, OH 45469 USA. RP Parker, JH (reprint author), USAF, Sensors Directorate, AFRL, SNJT, 3050 C St, Wright Patterson AFB, OH 45433 USA. NR 18 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 USA SN 0001-1452 J9 AIAA J JI AIAA J. PD FEB PY 2003 VL 41 IS 2 BP 176 EP 181 DI 10.2514/2.1958 PG 6 WC Engineering, Aerospace SC Engineering GA 648ET UT WOS:000181137300004 ER PT J AU Maple, RC King, PI Wolff, JM Orkwis, PD AF Maple, RC King, PI Wolff, JM Orkwis, PD TI Split-domain harmonic balance solutions to Burger's equation for large-amplitude disturbances SO AIAA JOURNAL LA English DT Article AB A new split-domain harmonic balance approach is presented. The split-domain approach combines the conventional multidomain harmonic balance approach with a split-operator technique in a unique way to solve periodic unsteady flow problems efficiently. The new technique is applied to Burger's equation to obtain solutions for two large-amplitude periodic boundary conditions-a single-frequency sine wave and a simulated wake function. Solutions containing strong moving discontinuities are obtained with Fourier series containing up to 48 frequencies for various grid densities. The split-domain harmonic balance solutions are compared with conventional time-accurate solutions. The differences between the two are found to be asymptotic with respect to the number of Fourier frequencies included. In addition, the harmonic balance approach was found to be sensitive to grid density. C1 USAF, Inst Technol, Dept Aeronaut & Astronaut, AFIT,ENY, Wright Patterson AFB, OH 45433 USA. Wright State Univ, Dept Mech & Mat Engn, Dayton, OH 45435 USA. Univ Cincinnati, Dept Aerosp Engn & Engn Mech, Cincinnati, OH 45221 USA. RP Maple, RC (reprint author), USAF, Inst Technol, Dept Aeronaut & Astronaut, AFIT,ENY, 2950 P St,Bldg 640, Wright Patterson AFB, OH 45433 USA. NR 8 TC 7 Z9 7 U1 1 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 USA SN 0001-1452 J9 AIAA J JI AIAA J. PD FEB PY 2003 VL 41 IS 2 BP 206 EP 212 DI 10.2514/2.1962 PG 7 WC Engineering, Aerospace SC Engineering GA 648ET UT WOS:000181137300008 ER PT J AU Erickson, QL Kobayashi, T Vogel, PS AF Erickson, QL Kobayashi, T Vogel, PS TI Woody edema of the legs SO AMERICAN FAMILY PHYSICIAN LA English DT Editorial Material ID ELEPHANTIASIS-NOSTRAS C1 Wilford Hall USAF Med Ctr, Lackland AFB, TX 78236 USA. RP Erickson, QL (reprint author), Wilford Hall USAF Med Ctr, 2200 Berquist Dr, Lackland AFB, TX 78236 USA. NR 7 TC 1 Z9 1 U1 0 U2 0 PU AMER ACAD FAMILY PHYSICIANS PI KANSAS CITY PA 8880 WARD PARKWAY, KANSAS CITY, MO 64114-2797 USA SN 0002-838X J9 AM FAM PHYSICIAN JI Am. Fam. Physician PD FEB 1 PY 2003 VL 67 IS 3 BP 583 EP 584 PG 2 WC Primary Health Care; Medicine, General & Internal SC General & Internal Medicine GA 644ND UT WOS:000180923600019 PM 12588081 ER PT J AU Kirkham, DM AF Kirkham, DM TI FDR and the creation of the UN SO AMERICAN STUDIES INTERNATIONAL LA English DT Book Review C1 USAF Acad, Colorado Springs, CO 80840 USA. RP Kirkham, DM (reprint author), USAF Acad, Colorado Springs, CO 80840 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU GEORGE WASHINGTON UNIV PI WASHINGTON PA AMERICAN STUDIES PROGRAM, WASHINGTON, DC 20052 USA SN 0883-105X J9 AM STUD INT JI Am. Stud. Int. PD FEB PY 2003 VL 41 IS 1-2 BP 243 EP 244 PG 2 WC History SC History GA 659KW UT WOS:000181776700023 ER PT J AU Sandholt, PE Moen, J Farrugia, CJ Cowley, SWH Lester, M Milan, SE Valladares, C Denig, WF Eriksson, S AF Sandholt, PE Moen, J Farrugia, CJ Cowley, SWH Lester, M Milan, SE Valladares, C Denig, WF Eriksson, S TI Multi-site observations of the association between aurora and plasma convection in the cusp/polar cap during a southeastward (B-y similar or equal to vertical bar B-z vertical bar) IMF orientation SO ANNALES GEOPHYSICAE LA English DT Article DE magnetospheric physics; auroral phenomena; magnetopause, cusp and boundary layers; plasma convection ID INTERPLANETARY MAGNETIC-FIELD; FLUX-TRANSFER EVENTS; MAGNETOSPHERE-IONOSPHERE SYSTEM; HIGH-LATITUDE CONVECTION; DAYSIDE MAGNETOPAUSE; ALIGNED CURRENTS; HF RADAR; CUSP AURORA; POLAR CUSP; RECONNECTION AB In a case study we demonstrate the spatiotemporal structure of aurora and plasma convection in the cusp/polar cap when the interplanetary magnetic field (IMF) B-z < 0 and B-y similar or equal to \B-z\ (clock angle in GSM Y - Z plane: similar or equal to 135degrees). This IMF orientation elicited a response different from that corresponding to strongly northward and southward IMF. Our study of this "intermediate state" is based on a combination of ground observations of optical auroral emissions and ionospheric plasma convection. Utilizing all-sky cameras at Ny Alesund, Svalbard and Heiss Island (Russian arctic), we are able to monitor the high-latitude auroral activity within the similar to10:00-15:00 MLT sector. Information on plasma convection is obtained from the SuperDARN radars, with emphasis placed on line of sight observations from the radar situated in Hankasalmi, Finland (Cutlass). A central feature of the auroral observations in the cusp/polar cap region is a similar to30-min long sequence of four brightening events, some of which consists of latitudinally and longitudinally separated forms, which are found to be associated with pulsed ionospheric flows in merging and lobe convection cells. The auroral/convection events may be separated into different forms/cells and phases, reflecting a spatiotemporal evolution of the reconnection process on the dayside magnetopause. The initial phase consists of a brightening in the postnoon sector (similar to12:00-14:00 MLT) at similar to73degrees MLAT, accompanied by a pulse of enhanced westward convection in the postnoon merging cell. Thereafter, the event evolution comprises two phenomena which occur almost simultaneously: (1) Westward expansion of the auroral brightening (equatorward boundary intensification) across noon, into the similar to10:00-12:00 MLT sector, where the plasma convection subsequently turns almost due north, in the convection throat, and where classical poleward moving auroral forms (PMAFs) are observed; and (2) auroral brightening at slightly higher latitudes (similar to75degrees MLAT) in the postnoon lobe cell, with expansion towards noon, giving rise to a clear cusp bifurcation. The fading phase of PMAFs is accompanied by a "patch" of enhanced (similar to1 km/s) poleward-directed merging cell convection at high latitudes (75-82degrees MLAT), e.g. more than 500 km poleward of the cusp equatorward boundary. The major aurora/convection events are recurring at similar to5-10 min intervals. C1 Univ Oslo, Dept Phys, Oslo, Norway. Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA. Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Boston Coll, Inst Sci Res, Newton Ctr, MA USA. USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA USA. Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA. RP Sandholt, PE (reprint author), Univ Oslo, Dept Phys, Oslo, Norway. EM p.e.sandholt@fys.uio.no NR 55 TC 16 Z9 16 U1 1 U2 2 PU EUROPEAN GEOPHYSICAL SOC PI KATLENBURG-LINDAU PA MAX-PLANCK-STR 13, 37191 KATLENBURG-LINDAU, GERMANY SN 0992-7689 J9 ANN GEOPHYS-GERMANY JI Ann. Geophys. PD FEB PY 2003 VL 21 IS 2 BP 539 EP 558 PG 20 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA 775MW UT WOS:000189046000007 ER PT J AU Price, SD Noah, PV Mizuno, D Walker, RG Jayaraman, S AF Price, SD Noah, PV Mizuno, D Walker, RG Jayaraman, S TI Midcourse Space Experiment mid-infrared measurements of the thermal emission from the zodiacal dust cloud SO ASTRONOMICAL JOURNAL LA English DT Article DE interplanetary medium ID BANDS AB The Midcourse Space Experiment (MSX) sampled the mid-infrared thermal emission from the zodiacal dust cloud in spectral bands centered at 8.3, 12, 15, and 21 mum with a variety of experiments during a 9 month period in 1996. Seventy ecliptic latitude profiles were measured between Sun-centered longitudes of 98degrees and 335degrees, and a single longitudinal scan was obtained along the ecliptic plane between 160degrees and 330degrees solar elongations. These observations complement the contiguous Infrared Astronomy Satellite and Diffuse Infrared Background Experiment (DIRBE) Cosmic Background Explorer surveys by extending the mid-infrared coverage beyond the solar exclusion limits of these experiments and measuring the emission at much higher spatial resolution. The MSX observations are at high sensitivity, similar to2 x 10(12) cm(-2) mum sr(-1), and spatial resolution, 2' to 3'. The MSX and DIRBE measurements are in good agreement where they do overlap. We describe the data processing that created the database and the estimated accuracy and precision. C1 USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA. Mission Res Corp, Nashua, NH USA. Boston Coll, Inst Sci Res, Chestnut Hill, MA 02467 USA. Vanguard Res Inc, Scotts Valley, CA 95055 USA. RP Price, SD (reprint author), USAF, Res Lab, Space Vehicles Directorate, 29 Randolph Rd, Hanscom AFB, MA 01731 USA. NR 17 TC 5 Z9 5 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD FEB PY 2003 VL 125 IS 2 BP 962 EP 983 DI 10.1086/346089 PG 22 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 639NL UT WOS:000180635900041 ER PT J AU Caldwell, JL Prazinko, BF Rowe, T Norman, D Hall, KK Caldwell, JA AF Caldwell, JL Prazinko, BF Rowe, T Norman, D Hall, KK Caldwell, JA TI Improving daytime sleep with temazepam as a countermeasure for shift lag SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Article DE temazepam; shift work; fatigue; cognitive performance ID SIMULATED NIGHT-SHIFT; PERFORMANCE; WORK; ALERTNESS; TRIAZOLAM; TENDENCY; PLACEBO; LIGHT AB Background: Working night shift (reverse cycle) presents problems to personnel due to the difficulty in maintaining alertness during the night-time hours. When the shift must be worked several consecutive nights, a cumulative sleep debt is created. Appropriate countermeasures are required to help personnel obtain as much sleep as possible so they may perform their duties effectively. Hypothesis: The objectives were to determine whether a hypnotic taken before daytime sleep would improve sleep quality, and to determine whether improved daytime sleep would increase alertness, reduce fatigue, and mitigate the usual performance decrements which occur on night shift. Methods: Sixteen UH-60 Army aviators were randomly assigned to either a temazepam or a placebo group. Test sessions, consisting of vigilance assessments, flight simulation, and mood state questionnaires were administered during baseline, three nights of reverse cycle, and three days following a return to day shift. Temazepam (30 mg) was administered before daytime sleep to one group while another group received a lactose-filled capsule. Results: Subjects who received temazepam slept longer and with less fragmentation than those who received placebo. Generally, the subjects in the temazepam group indicated more subjective alertness and less fatigue than those in the placebo group. Flight performance was not unequivocally improved by better daytime sleep, but the temazepam group performed better on the Psychomotor Vigilance Task than the placebo group. Conclusions: Temazepam is helpful in prolonging daytime sleep, with some attenuation of performance decrements during the night shift. However, physicians should be careful when administering this substance to ensure the aviator has a minimum of 8 h in which to sleep. C1 USA, Aeromed Res Lab, Ft Rucker, AL USA. RP Caldwell, JL (reprint author), AFRL, HEPM, Human Effectiveness Directorate, Biodynam & Protect Div, Bldg 170,2504 Gillingham Dr, Brooks AFB, TX 78235 USA. NR 32 TC 11 Z9 12 U1 1 U2 1 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD FEB PY 2003 VL 74 IS 2 BP 153 EP 163 PG 11 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA 640WD UT WOS:000180710300008 PM 12602447 ER EF