| Diamond/CNT Film Interface for Heat Dissipation in Electronic Devices |
29-Sep-2009 |
10 pages |
| Authors:
Phan Ngoc Minh; VIETNAM ACADEMY OF SCIENCE AND TECHNOLOGY HANOI INST OF MATERIALS SCIENCE (VAST)
|
 | Commercial thermal matching media such as thermal grease are normally basing on silver. By adding a suitable amount of the CNTs into the commercial silver paste, it is expected to improve the conductivity and the performance of any high power electronic components such as micro-processor, high power laser, high power LED for lighting, and so on. In this research, CNT materials were successfully functionalized to form CNT-COOH and CNT-C6H4NH2. The ... |
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| RHELP (Regenerative High Efficiency Low Pressure) Air Purification System |
18-Jun-2009 |
104 pages |
| Authors:
Chang-Yu Wu; Wolfgang Sigmund; Brian Damit; Qi Zhang; Myung-Heui Woo; Hyoungjun Park; Jan Marijnissen; Chang Y Cha; Alayna Jimenez; FLORIDA UNIV GAINESVILLE DIV OF SPONSORED RESEARCH
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| This project aims to develop a RHELP (Regenerative-High Efficiency-Low Pressure) air purification system using a novel ceramic nanofiber on silicon carbide in a microwave oxidizer that can effectively decontaminate air containing aerosolized chemical and biological (CB) agents. Nanofibermats of several materials were designed and fabricated using electrospinning process. Physical filtration testing showed performance (filter quality) exceeding military HEPA requirement. Multiple layers were found to have better filter quality than single ... |
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| Defects Associated with Solidification of Melt-Processed Superalloys for the Aerospace Industry |
Jun-2009 |
12 pages |
| Authors:
J E Spowart; M D Asta; S H Davis; D N Seidman; P W Voorhees; T M Pollock; C F Woodward; NORTHWESTERN UNIV EVANSTON IL DEPT OF MATERIALS SCIENCE AND ENGINEERING
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| Our Materials Engineering for Affordable New Systems (MEANS) program was centered on developing an integrated computational framework for predicting the conditions under which turbine blades can be produced that are free of deleterious solidification defects. We studied the solidification process over length scales from subnanometer to millimeter and produced a theory for defect formation. Close interaction with industry was necessary to ensure the resulting computational model will be in a ... |
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| Comparison of Fire and Smoke Simulator (FSSIM) Predictions with Hydraulic Fluid Spray Fire Test Data |
10 DEC 2007 |
74 pages |
| Authors:
John B. Hoover; Frederick W. Williams; NAVY TECHNOLOGY CENTER FOR SAFETY AND SURVIVABILITY WASHINGTON DC
|
| Results from large-scale hydraulic fluid spray fire tests have been compared with simulations of those tests using the Fire and Smoke Simulator (FSSIM) model. Using a model calibration data set, the sensitivity of FSSIM to several key inputs was evaluated; for the critical heat release rate (HRR) parameter, an adjustment factor was estimated to correct for unburned fuel. The resulting input parameters were then applied to similar data sets and ... |
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| CLIVAR Mode Water Dynamics Experiment (CLIMODE), Fall 2006 R/V Oceanus Voyage 434, November 16, 2006-December 3, 2006 |
DEC 2007 |
|
| Authors:
Sebastien Bigorre; Robert Weller; Jeff Lord; John Lund; Jaime Palter; George Tupper; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
 | CLIMODE (CLIVAR Mode Water Dynamics Experiment) is a research program designed to understand and quantify the processes responsible for the formation and dissipation of North Atlantic subtropical mode water also called Eighteen Degree Water (EDW). Among these processes, the amount of buoyancy loss at the ocean-atmosphere interface is still uncertain and needs to be accurately quantified. In November 2006, cruise 434 onboard R/V Oceanus traveled in the region of the ... |
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| Conduction and Convection of Heat Produced by the Attenuation of Laser Beams in Liquids |
SEP 2007 |
44 pages |
| Authors:
Irwin S. Goldberg; Misty Garcia; Saher Maswadi; Robert J. Thomas; Clifton D. Clark; SAINT MARY'S UNIV OF SAN ANTONIO TX
|
| Mathematical models are used to simulate temperature changes that are induced by the absorption of energy from propagating laser beams in water. Both convective and conductive heat transfer are considered. Thermally insulated surfaces as well as surfaces involving heat transfer with the surroundings are considered. The simulated results demonstrate the importance of thermal convection. In the first part of this report containers with closed surfaces are considered. In the second ... |
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| Physical and Chemical Processes in Flames |
SEP 2007 |
19 pages |
| Authors:
Chung K. Law; PRINCETON UNIV NJ DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
|
| The objective of the present program was to study the structure and response of laminar premixed and nonpremixed flames with emphases on effects of high pressure, flame/flow unsteadiness, and chemistry. Studies on flame dynamics show strong coupling between the intrinsic flamefront hydrodynamic cellular instabilities and the diffusional/thermal cellular or pulsating instabilities, for mixture Lewis numbers that are respectively smaller or larger than unity. Linear and nonlinear stability analyses on diffusion ... |
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| Heat Stress Mitigation for Leopard 2C Tank Crew |
MAY 2007 |
|
| Authors:
Ira Jacobs; Robert Michas; Robert Limmer; Debbie Kerrigan-Brown; Tom McLellan; P. Turbide; DEFENCE RESEARCH AND DEVELOPMENT TORONTO (CANADA)
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| The Directorate Armament Sustainment Programme Management (DASPM) requested Defence R&D Canada (DRDC) support with the investigation and recommendation of "...technologies available to mitigate the effects of the heat stress expected for Leopard 2C crews operating in the Kandahar region of Afghanistan in summer." DRDC was asked to focus "...on technologies that are likely to be able to be delivered and installed by the beginning of June 2007." Candidate heat stress ... |
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| Thermoregulatory Function During the Marathon |
2007 |
5 pages |
| Authors:
Robert W. Kenefick; Samuel N. Cheuvront; Michael N. Sawka; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA THERMAL AND MOUNTAIN MEDICINE DIVISION
|
| Marathon races are performed over a broad range of environmental conditions. Hyperthermia is a primary challenge for runners in temperature and warm weather, but hypothermia can be a concern during cool-wet or cold conditions. Body temperature during the marathon is a balance between metabolic heat production and exchange with the environment described by the heat balance equation. During exercise, core temperature is proportional to the metabolic rate and largely independent ... |
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| Forced Ventilation of Protective Garments for Hot Industries |
JUL 2006 |
5 pages |
| Authors:
Julio A. Gonzalez; Larry G. Berglund; Tom L. Endrusick; Meg A. Kolka; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| The performance of a battery powered, forced air distribution system for ventilation under protective clothing (torso body armor) was evaluated on a sweating thermal manikin in a 35 deg C and 50% RH environment. The ventilation system, delivering 9 L dot s(-1) of ambient air increased the heat loss from the manikin by 45 W. Measurements made on the manikin indicated that the ventilation decreased the dry thermal resistance and ... |
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| Electromagnetic Launching for Affordable Agile Access to Space |
15 APR 2006 |
71 pages |
| Authors:
Rainer Meinke; Hector Guiterrez; Daniel Kirk; ADVANCED MAGNET LAB INC MELBOURNE FL
|
| The conceptual design of a novel hypersonic electromagnetic launch system has been developed, which offers reliable access to space. While the concept can be scaled in both mass and launch speed, the performed study assumes a 100-kg projectile leaving the launcher at 7,000 m/sec. The projectile is propelled and levitated by electromagnetic forces inside of a low pressure tube filled with helium at about 10 torr. A fully controlled acceleration ... |
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| Power Losses and Thermal Modeling of A Voltage Source Inverter |
MAR 2006 |
124 pages |
| Authors:
Michael C. Oberdorf; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis presents thermal and power loss models of a three phase IGBT voltage source inverter used in the design of the 625KW fuel cell and reformer demonstration which is a top priority for the Office of Naval Research. The ability to generate thermal simulations of systems and to accurately predict a system s response becomes essential in order to reduce the cost of design and production, increase reliability, quantify ... |
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| CLIVAR Mode Water Dynamics Experiment (CLIMODE) Fall 2005 R/V Oceanus Voyage 419, November 9, 2005 - November 27, 2005 |
FEB 2006 |
|
| Authors:
Lara Hutto; Robert Weller; David Fratantoni; Jeff Lord; John Kemp; John Lund; Elena Brambilla; Sebastien Bigorre; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| CLIMODE (CLIVAR Mode Water Dynamic Experiment) is a program designed to understand and quantify the processes responsible for the formation and dissipation of North Atlantic subtropical mode water, also called Eighteen Degree Water (EDW). Among these processes, the amount of buoyancy loss at the ocean-atmosphere interface is still uncertain and needs to be accurately quantified. In November 2005, a cruise was made aboard R/V Oceanus in the region of the ... |
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| Integrated Chemical Fuel Microprocessor for Power Generation in MEMS Applications |
24 AUG 2005 |
40 pages |
| Authors:
Klavs F. Jensen; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMICAL ENGINEERING
|
| This document reports results obtained via Integrated Chemical Fuel Microprocessor for Power Generation in MEMS Applications" during the performance period, 1 September 1999 - 31 March 2004. The overall goal of this program was to demonstrate a chemical fuel processing microsystem for power generation in MEMS applications. The program had several major accomplishments: 1. Development and fabrication of a new, thermally efficient, suspended tube MEMS heat exchanger/fuel processor. 2. Design ... |
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| Numerical Analysis of Free Molecule Micro-Resistojet Performance |
JUN 2005 |
13 pages |
| Authors:
Zeeshan Ahmed; Sergery Gimelshein; Andrew Ketsdever; CALIFORNIA UNIV LOS ANGELES
|
| One of the most crucial requirements of modern space missions is the miniaturization of spacecraft and satellites. The miniaturization is tightly connected with new space technologies promoted by the Air Force, DARPA, and NASA, such as spacecraft formation flying, that implies two or more spacecraft that operate synchronously in a controlled spatial configuration. This, in turn, necessitates the development of new propulsion systems able to deliver precise impulse bits while ... |
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| Thermophysiological Responses of Human Volunteers to Whole Body RF Exposure at 220 MHz |
19 MAY 2005 |
15 pages |
| Authors:
Eleanor R. Adair; Dennis W. Blick; Stewart J. Allen; Kevin S. Mylacraine; John M. Ziriax; Dennis M. Scholl; ADVANCED INFORMATION ENGINEERING SERVICES BROOKS CITY-BASE TX
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| Since 1994, our research has demonstrated how thermophysiological responses are mobilized in human volunteers exposed to three radio frequencies, 100, 450, and 2450 MHz. A significant gap in this frequency range is now filled by the present study, conducted at 220 MHz. Thermoregulatory responses of heat loss and heat production were measured in six adult volunteers (five males, one female, aged 24-63 years) during 45 min whole body dorsal exposures ... |
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| Collection Methods and Laboratory Processing of Samples from Donnelly Training Area Firing Points, Alaska, 2003 |
MAR 2005 |
74 pages |
| Authors:
Marianne E. Walsh; Charles A. Ramsey; Charles M. Collins; Alan D. Hewitt; Michael R. Walsh; Kevin L. Bjella; Dennis J. Lambert; Nancy M. Perron; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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| At firing points for 105-mm howitzers, 2,4-DNT is detectable in the surface soils. 2,4-DNT is listed as a hazardous substance by the EPA and several states, including Alaska. Sample collection methods and laboratory subsampling procedures were developed to estimate the mean concentration of 2,4-DNT at a sparsely vegetated firing point. Collection of replicate 50-increment samples, where the <2-mm fraction was approximately 3 kg, was found to be adequate to estimate ... |
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| Measurements and Modeling of Combustion Dynamics for Control of Combustion Instabilities |
10 DEC 2004 |
56 pages |
| Authors:
Fred Culick; Albert Ratner; Dal M. Kang; Konstantin I. Matveev; Winston Pun; CALIFORNIA INST OF TECH PASADENA
|
| This report is the final report of a six-month program with a six- month NCE comprising experimental work on problems arising with unsteady combustion of gases intended for use in propulsion systems. The experimental work comprises measurements providing the basis for inferring the local response function of a reacting mixture and is based on great extended equipment purchased before this program began, with a DURIP grant from AFOSR. The basic ... |
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| Prediction of Times of Facial and Finger Freezing During Cold Air Exposure |
AUG 2004 |
|
| Authors:
Peter Tikuisis; Allan A. Keefe; DEFENCE RESEARCH AND DEVELOPMENT TORONTO (CANADA)
|
| The Cold Exposure Survival Model (CESM) has undergone various modifications since its inception as a decision aid for Search and Rescue. The present change is the addition of the prediction of the risk of frostbite of the cheek and finger. This risk is not confined to just the casualty, but it might also apply to the rescuers. Hence, predictions on the risk of frostbite and its rate of onset would ... |
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| Experimental Study of Plasma/Propellant Interactions |
23 APR 2004 |
30 pages |
| Authors:
Stefan T. Thynell; Thomas A. Litzinger; PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF MECHANICAL AND NUCLEAR ENGINEERING
|
| The overall objective of the project was to improve our understanding of the various chemical and physical processes that occur during ignition by the plasma igniter. During the project period, electrical circuits, experimental setups were designed and manufactured, as well as data acquisition systems were acquired. The following primary findings have been obtained from this project: 1) to achieve ignition, a closed chamber configuration is needed, 2) JA2 propellant is ... |
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| Nano/HEDM Technology: Late Stage Exploratory Effort |
OCT 2003 |
40 pages |
| Authors:
Jeffrey C. Bottaro; Mark Petrie; Paul E. Penwell; Allen L. Dodge; Ripu Malhotra; SRI INTERNATIONAL MENLO PARK CA CHEMISTRY LAB
|
| This work is focused on a continued, escalating effort to develop new energetic functional groups which offer enhanced energy, oxygen balance, and density in that order of priority. A continuation of the study of addition of nitrene precursors to N,N-dialkyl nitrosamines is described; the nitrene derived from 1-amino-3,5-dinitro-1 ,2,4-triazole has been approached by oxidation of the parent amine. Initial results were not successful; aminodinitrotriazole in the presence of lead tetra-acetate ... |
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| Heat Dissipation for High Power Optically Pumped Semiconductor Vertical External Cavity Surface Emitting Lasers |
OCT 2003 |
6 pages |
| Authors:
Thomas Nelson; Donald Agresta; James Ehret; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH SENSORS DIRECTORATE
|
| This is an interim report on research on vertical external-cavity surface-emitting lasers, a collaboration between AFRL and the University of Arizona. This report investigates heat generation under high-power optical pumping for VECSELs, and studies the effects of sample mounting and substrate removal by means of photoluminescence experiments. |
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| Body Heat Storage and Work in the Heat |
OCT 2003 |
11 pages |
| Authors:
Glen Kenny; OTTAWA UNIV (ONTARIO)
|
| During the first fiscal year of the project, research has been directed towards redesigning and rebuilding the Snellen Air Calorimeter. At this time, we are on schedule having completed the reconstruction of the calorimeter and the installation of the mechanical operating system. The system is designed to be operational in a wide range of ambient conditions (5-30 deg C). Preliminary calibration has been started and will continue over the next ... |
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| The eXtreme Adaptive DSP Solution to Sensor Data Processing |
23 SEP 2003 |
14 pages |
| Authors:
Martin Vorbach; Leo Mirkin; SKY COMPUTERS INC PEABODY MA
|
| The new ISR mobile autonomous sensor platforms present a difficult challenge to the current generation of high-speed DSP solutions. The high- bandwidth data streams must be processed with minimal power and heat dissipation. The programmatic needs on the new SR platforms include a rapid pace of technology upgrades, a quick development cycle, and lower costs; especially reduction in the software development costs and risks. These goals conflict with high- cost ... |
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| PDF Modelling of Turbulent Combustion |
SEP 2002 |
59 pages |
| Authors:
Stephen B. Pope; CORNELL UNIV ITHACA NY DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
|
| Significant advances have been made in several aspects of the computational modelling of turbulent combustion. PDF model calculations have been performed of turbulent piloted-jet non-premixed flames. The results demonstrated the ability of the methodology to account, accurately, for the local extinction and reignition observed experimentally in these flames. It was shown that these flames can be sensitive to the temperature of the pilot and to radiative heat loss. A new ... |
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| Micro-Combustion for Nano and Pico Satellite Propulsion Systems |
SEP 2002 |
4 pages |
| Authors:
Christopher P. Cadou; MARYLAND UNIV COLLEGE PARK DEPT OF AEROSPACE ENGINEERING
|
| This research investigates the physics of micro-scale, fluid- structure coupling in reacting flow systems for the purpose of developing efficient micro-rocket motors. The research is motivated by the U.S. Air Force's need in the coming decade for compact propulsion devices suitable for positioning and attitude control of micro-satellites and other micro-scale space vehicles. While there is a range of technologies that are available for this purpose, chemical rockets remain extremely ... |
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| Hydrography of the Labrador Sea During Active Convection |
25 JUN 2002 |
|
| Authors:
Robert S. Pickart; Daniel J. Torres; R. Allyn Clarke; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| The hydrographic structure of the Labrador Sea during wintertime convection is described. The cruise, part of the Deep Convection Experiment, took place in February-March 1997 amidst an extended period of strong forcing in an otherwise moderate winter. Because the water column was preconditioned by previous strong winters, the limited forcing was enough to cause convection to approximately 1500 m. The change in heat storage along a transbasin section, relative to ... |
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| Operational and Thermophysiological Needs for Metabolic Heat Dissipation: Ways, Deviations, and Progress |
APR 2002 |
3 pages |
| Authors:
Hans-Joachim Knoefel; GERMAN AIR FORCE INST OF AVIATION MEDICINE MANCHING (GERMANY)
|
| The thermophysiological regulation of body temperature is partially or completely inhibited by protection suits especially when several qualities of protection are needed. The result of an insufficient thermophysiological response is heat stress with decreased mental and physical performance of the human being. To get an idea about the amount of heat stress different physiological values are measured: metabolic rate, heat frequency, mean skin and core temperature, sweat rate, psychological performance ... |
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| Testing a New Concept of Immersion Suit at Sea |
APR 2002 |
|
| Authors:
Michel B. Ducharme; DEFENCE AND CIVIL INST OF ENVIRONMENTALMEDICINE DOWNSVIEW (ONTARIO)
|
| A new concept of immersion suit, the nearly dry suit, was recently developed to overcome the main limitations of the wet and dry suits. The main new feature of the suit is the adjustable seals that can be closed before or upon entry in water. The purpose of the present study was to test the new suit at sea against a standard dry suit. Seven male subjects were immersed for ... |
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| Simulation of Human Thermoregulatory Responses to Micro-Cooling in Hot Environments |
JAN 2002 |
6 pages |
| Authors:
Larry G. Berglund; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| Situations occur where individual cooling is desirable to reduce heat injury and improve productivity. Simulation of human responses while wearing possible micro-cooling systems can assist planning and soften their development. A thermo-physiological model modified for micro-cooling was developed to predict body temperatures, other physiological parameters, and discomfort in hot environments. The micro-cooling simulated was: (1) uniform whole body cooling under clothing, (2) cooling of upper torso with a water cooled ... |
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| InP/InGaAs Heterojunction Bipolar Transistors Grown on Ge/P Co-implanted InP Substrates by Metal-Organic Molecular Bean Epitaxy |
2002 |
3 pages |
| Authors:
W. J. Sung; R. F. Kopf; D. J. Werder; C. T. Liu; Y. K. Chen; CALIFORNIA UNIV LOS ANGELES
|
| InP/InGaAs Heterojunction Bipolar Transistors (HBTs) have demonstrated excellent high- frequency performance 1-4 and are widely used for optical fiber transmission 5-7. However; the current mesa HBT structure utilizes a very thick, highly doped n+InGaAs layer for the subcollector contact. This added mesa height makes multilevel interconnection processes more difficult, which impedes the capability of fabricating compact integrated circuits. In addition, rip has a much higher thermal conductivity than InGaAs, so ... |
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| A Model Predictor for Chemical Laser Combustors |
15 DEC 2001 |
17 pages |
| Authors:
M. A. Kwok; AEROSPACE CORP EL SEGUNDO CA
|
| This spreadsheet model attempts to replicate many of the empirical features observed in HF chemical laser combustors, or gain generators, from time-start. The model, dubbed HYFLAME, is constructed from control volume analyses of the combustor vessel that are described by modules depicting the simplified combustion thermochemistry, fluid mechanics for one-dimensional steady nozzle flow, chemical kinetics in frozen flow, simplified heat transfer analyses, and a simple thermal-structural model. Model outputs include ... |
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| Think Layers When Dressing for Exercise in the Cold |
OCT 2001 |
2 pages |
| Authors:
Catherine O'Brien; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA THERMAL AND MOUNTAIN MEDICINE DIVISION
|
| Whether or not you get cold during outdoor activities depends on certain factors including environmental conditions, how much heat your body produces, and whether your body conserves or loses that heat. Humans have two primary physiological responses to cold: vasoconstriction and shivering. Vasoconstriction decreases blood flow to the skin, reducing the rate of heat loss. Shivering increases body beat production. Although these mechanisms maintain body temperature during brief, mild cold ... |
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| Thermographic Assessment of the Heat Dissipation Associated with Fatigue Crack Growth in Mild Steel |
AUG 2001 |
|
| Authors:
N. Rajic; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) AERONAUTICAL AND MARITIME RESEARCH LAB
|
| This report examines the feasibility of predicting rates of crack growth in mild steel based on an evaluation of the crack tip dissipated energy A numerical scheme is developed to provide a basis for the computation of dissipated power from measurements of temperature acquired using remote infrared detection. An experimental study is then described where measurements of crack- growth rate in mild-steel coupons exposed to constant amplitude cyclic loading are ... |
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| Thermal Resistance of Inflatable and Non-Inflatable Floors of One-Man Life Rafts for the CF-188 Escape System |
JUL 2001 |
|
| Authors:
M. B. Ducharme; DEFENCE AND CIVIL INST OF ENVIRONMENTALMEDICINE DOWNSVIEW (ONTARIO)
|
| The purpose of this study was to define, using humans as heat source, the difference in thermal resistance of inflatable and non-inflatable floors of one-man life rafts for the CF 188 Escape System of the Canadian Forces. Three life rafts were tested: two with an inflatable floor and one with a non- inflatable floor. Eight subjects of both genders were used to evaluate the thermal resistance of the floors because ... |
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| PDF Modelling of Turbulent Combustion |
19 JUN 2001 |
4 pages |
| Authors:
Stephen B. Pope; CORNELL UNIV ITHACA NY DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
|
| Important advances are being made in our understanding of turbulent combustion through the comparison between PDF model calculations and detailed experimental data. Previous calculations for the Sandia piloted jet flames have been extended in order to study the sensitivity to the pilot flame temperature and to radiative heat loss. Research is in progress on a new methodology ISAT-DR (in situ adaptive tabulation with dimension reduction) to incorporate detailed chemistry in ... |
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| Decay of Agulhas Rings Due to Cross-Frontal Secondary Circulations |
19 JAN 2001 |
5 pages |
| Authors:
S. S. Drijfhout; L. De Steur; P. J. Van Leeuwen; ROYAL NETHERLANDS METEOROLOGICAL INST DE BILT
|
| A series of idealized numerical experiments is presented to study the evolution of an Agulhas ring. The modeled ring is a circular symmetric idealization of ring Astrid, as measured by a cruise in March 2000. In particular, the hypothesis is tested that mixing is mainly due to cross-frontal secondary circulations. Both the role of beta-decay and shear instabilities in setting-up cross-frontal mixing is studied. The largest mixing of ring water ... |
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| Catalytic Decomposition of Nitrous Oxide for Spacecraft Propulsion Applications (Phase 1) |
11 OCT 2000 |
112 pages |
| Authors:
Guy Richardson; SURREY SATELLITE TECHNOLOGY LTD GUILDFORD (UNITED KINGDOM)
|
| This report results from a contract tasking Surrey Satellite Technology, Ltd. as follows: Work package 1(2 months - $10 K) A paper study will be undertaken to compare nitrous oxide mono-propellant thrusters with hydrogen peroxide and hydrazine mono-propellant thrusters. A test plan for the nitrous oxide mono-propellant thrusters experimental work will also be produced. Work package 2 (10 months - $40 K) From the experimental data an operational envelope for ... |
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| PDF Modelling of Turbulent Combustion |
01 JUL 2000 |
8 pages |
| Authors:
Stephen B. Pope; CORNELL UNIV ITHACA NY DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
|
| Significant progress was made in the application of PDF-based turbulent combustion models to the Sandia pilot-jet nonpremixed flames. These PDF calculations were described in two recent papers (Xu & Pope 2000 and Tang, Xu & Pope 2000) and they are summarized in this report. The first of these works showed that the PDF method is capable of describing, quantitatively, the phenomena of local extinction and reignition ... |
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| Testing and Evaluation of the International Biomedical, Inc., Model 185M, Airborne Life Support System. |
JUN 2000 |
18 pages |
| Authors:
Butch O. Blake; AIR FORCE RESEARCH LAB BROOKS AFB TX HUMAN EFFECTIVENESS DIRECTORATE; AIR FORCE RESEARCH LAB BROOKS AFB TX HUMAN EFFECTIVENESS DIRECTORATE
|
| The International Biomedical, Inc., Model 185M, Airborne Life Support System (ALSS) is an infant transport incubator. It provides an environment to sustain an infant's life support requirements while being transported. The ALSS's standard infant chamber circulates heated air and comes equipped with one main door, one head door, and two hand ports. The ALSS's main door allows access for infant placement inside the infant chamber as well as further access ... |
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| Testing and Evaluation of the International Biomedical Inc. Model 20M, Neonatal Transport System |
FEB 2000 |
29 pages |
| Authors:
Butch O. Blake; AIR FORCE RESEARCH LAB BROOKS AFB TX HUMAN EFFECTIVENESS DIRECTORATE
|
| The International Biomedical, Inc., Model 20M, Neonatal Transport System is an infant transport incubator. It provides an environment to support an infant's requirements while being transported. The Neonatal Transport System has a standard infant chamber that circulates warmed air and comes equipped with one main door, one head door, and two hand ports. The Neonatal Transport Systems main door allows access for infant placement inside the infant ... |
|
| Adaptive-Speed Quasi-CAV Algorithm in a CD-RW Drive |
2000 |
|
| Authors:
M. S. Yen; William Wang; C. H. Chen; T. T. Chen; ACER PERIPHERALS INC TAOYUAN (TAIWAN) STORAGE DEVICE DIV
|
| The performance of a CD-RW drive is evaluated mainly in terms of recording data rate, access time, and power consumption. Constant linear velocity (CLV) recording technology is broadly employed in almost all the commercially available CD-RW drives today. In the CLV mode, the spindle motor which is driven by the real-time linear velocity of the disc will always be braked while seeking outwards or accelerated for inward-oriented seeks. Since the ... |
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| Energy Metabolism in Cold-Stressed Females: Implications for Predictive Modeling (95 Women) |
NOV 1999 |
|
| Authors:
Ira Jacobs; DEFENCE AND CIVIL INST OF ENVIRONMENTALMEDICINE DOWNSVIEW (ONTARIO)
|
| Military operations in cold environments have resulted in life- threatening situations if personnel are ill-equipped or unprotected. Prediction of survival time in the cold (ST) is essential for search and rescue purposes, to forecast contingencies for operations in such environments, and to evaluate the potential benefits of innovative equipment/clothing designed to protect the soldier from cold. Mathematical models of ST are based on the magnitude and capacity for increasing metabolic ... |
|
| Skin Blood Flow Responses and Forearm Reactive Hyperemia After Niacin Ingestion |
OCT 1999 |
40 pages |
| Authors:
Margaret A. Kolka; Brent S. Mair; Catherine L. Gabaree; Lou A. Stephnson; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| Skin blood flow and core temperature were measured before and after niacin ingestion in eight subjects. Each subject was tested on two occasions in climatic conditions of 30 deg C with moderate humidity. Following niacin ingestion, peak forearm blood flow (FBF) by venous occlusion plethysmography averaged 8.0(1.7) ml/100ml/min from an average baseline of 2.2(0.5) ml/100ml/ min, an increase of 265%. Forearm skin blood flow (laser ... |
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| Plasma Processes in Pulsed Plasma Microthrusters |
SEP 1999 |
69 pages |
| Authors:
Rodney L. Burton; M. J. Wilson; S. S. Bushman; E. A. Antonsen; ILLINOIS UNIV AT URBANA DEPT OF AERONAUTICAL AND ASTRONAUTICAL ENGINEERING
|
| This final technical report summarizes research on low-power pulsed Teflon(Trademark) plasma propulsion for satellites. Section I discusses a compact thrust stand used to make thrust and impulse bit measurements. Section II describes experimental measurements on a gasdynamic-type PPT in which measurements of magnetic field, electron number density, electron temperature, ion speed ratio and gas velocity are carried out by magnetic and advanced Langmuir probes. ... |
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| Benefits of Respiratory Heat and Moisture Exchangers during Cold Exposures |
SEP 1999 |
|
| Authors:
N. Carnevale; M. B. Ducharme; DEFENCE AND CIVIL INST OF ENVIRONMENTALMEDICINE DOWNSVIEW (ONTARIO)
|
| The purpose of this paper was to serve as a brief literature review overviewing the current state of knowledge pertaining to respiratory heat and moisture exchangers (HME' s). Recommendations were extracted from the review with the intention of informing the Dwyer Hill Training Center so that an informed decision could be made regarding further laboratory testing of HME's as well as setting policy regarding the use ... |
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| Impact of a Ventilated Hood on Heat Stress at High Relative Humidity |
05 AUG 1999 |
5 pages |
| Authors:
Jonathan Kaufman; Gregory Askew; Barry Shender; Kambiz Farahmand; NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD
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| Heat stress is a major problem associated with use of encapsulating chemical protective garments. Metabolic and externally imposed heat loads can be degrade cognitive and physical performance and prove life-treating if not adequately extracted from within protective clothing ensembles. Two approaches have historically been used to actively remove heat from encapsulating clothing ensembles: (1) vapor phase cooling, where the heat transfer medium is a vapor such as air; and (2) ... |
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| Physical/Biological Coupling Over the Continental Shelf |
24 JUN 1999 |
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| Authors:
Robert Beardsley; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
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| This ASSERT grant was used to support James Pringle, a physical oceanography student in the MIT/WHOI Joint Program in Oceanography, through the successful completion of his Ph.D. thesis work and the publication of several papers from his thesis. Jamie completed his thesis in 1 June 1998 and took a postdoctoral position with Peter Franks (SIO), where he has developed a coupled 3-D physical-biological numerical circulation model to study biological processes ... |
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| User Guide and Specifications for Electrically Isolating Non-Asbestos Gaskets for High-Temperature Service |
APR 1999 |
26 pages |
| Authors:
Charles P. Marsh; Vincent F. Hock; ARMY CENTER FOR PUBLIC WORKS ALEXANDRIA VA
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| Army Regulation 200-1 requires that installations must exclude asbestos from all procurements and uses where asbestos-free substitute materials are available, and minimize asbestos releases to the utmost extent possible. Prior to this ban, asbestos-based gaskets were used extensively and effectively by the Army. The ban has prompted the need for an effective replacement for dielectrically isolating cathodic protection flange gasket materials. Substitute materials are commercially available, but many do not ... |
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| An Autonomous Oceanographic Instrument Array |
18 MAR 1999 |
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| Authors:
W. B. Owens; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
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| Under this DURIP grant, ten profiling ALACE autonomous floats were procured and prepared for deployment. These floats included vertical velocity measurements at depth. They also provided profiles of temperature and salinity every time that they traveled from depth to the surface to transmit both the vertical velocity data and the profile data using the ARGOS system. There floats were deployed in February, 1997 on cruise 147 ... |
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Reports by Keyword(s)
HEAT LOSS
