| Satellite and Slow-Scan Television Observations of the Rise and Dispersion of Ash-Rich Eruption Clouds from Redoubt Volcano, Alaska, |
MAR 1992 |
|
| Authors:
Juergen Kienle; A. W. Woods; S. A. Estes; K. Ahlnaes; ALASKA UNIV FAIRBANKS GEOPHYSICAL INST
|
 | Polar-orbiting NOAA 10 and 11 weather satellites with their Advanced Very High Resolution Radiometer (AVHRR) imaging sensors and the Landsat 4 and 5 satellites have provided over 30 images of the 1989/90 eruptions of Redoubt Volcano. Between December 14 and April 21, about 20 major explosive eruptions occurred with ash plumes rising to heights of 10 km or more, most of them penetrating the tropopause. The ash severely impacted domestic ... |
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| Interdiction Mission Planning and Co-ordination During the Gulf Conflict 17 Jan - 27 Feb 91, |
MAR 1992 |
|
| Authors:
V. A. Mee; P. J. Goodman; ROYAL AIR FORCE BRUGGEN (UNITED KINGDOM) COMBAT OPERATIONS CENTRE
|
| The Gulf Air War started for Royal Air Force Tornado GRl aircraft with the delivery of JP 233 weapons from low level at night. After sustaining unacceptable losses at low level, tactics changed to delivery of freefall 1000 lb bombs from medium level, at first by night and then by day. Accuracies, however, improved dramatically with the arrival in theatre of precision guided munitions. |
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| An Efficient Method for Three-Dimensional Route Planning with Different Strategies and Constraints, |
MAR 1992 |
|
| Authors:
U. Leuthausser; F. Raupp; ESG ELEKTRONIK-SYSTEM G M B H (FEG) MUNICH (GERMANY F R)
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| A method for planning paths through a digital map is presented. The task consists of planning 3-dimensional paths for autonomous air vehicles over a terrain represented by a digital map with different strategies and constraints. Possible strategies minimize time, danger, or fuel consumption. Constraints are lateral and vertical maximum accelerations as well as time and fuel constraints. |
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| Implementation and Operational Experience with a New Arrival Traffic Management System at the Frankfurt ATC Center, |
MAR 1992 |
|
| Authors:
M. Schubert; U. Volckers; DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V BRUNSWIC K (GERMANY F R)
|
| The DLR-Institute for Flight Guidance had developed a new Arrival Traffic Management System called COMPAS (Computer Oriented Metering Planning Advisory System). The system has been implemented at the Frankfurt Regional Air Traffic Control Center in mid 1989 and is in continuous operation since then. A comprehensive implementation plan was developed in order to guarantee a smooth introduction in particular with respect to both technical issues and controller acceptance. The experience ... |
|
| Workshop on Integrated Crew Resource Management (CRM), 19-21 November 1991 |
MAR 92 |
173 pages |
| Authors:
Ronald J. Lofaro; MITECH INC WASHINGTON DC
|
 | The continuing development and implementation of Crew Resource Management (CRM) training and assessment began in the late 1970's. There is interest in exploring paradigms and techniques which address an integrated, simultaneous assessment of CRM skills and the more traditional Stick and rudder (flight control) skills. A preliminary model for analysis and assessment in integrated CRM was developed. This paradigm, and its potential uses, were investigated by an Air Transport Association ... |
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| Dental Compressed Air Systems |
MAR 92 |
40 pages |
| Authors:
Curtis D. Weyrauch; Samuel P. Davis; George W. Gaines; ARMSTRONG LAB BROOKS AFB TX
|
| The purpose of this report is to update guidelines on dental compressed-air systems (DCA). Much of the information was obtained from a survey of 128 compressed air systems throughout the Air Force. Air quality requirements are outlined. The general design and description of each part of a typical system is analyzed. Information needed to design a DCA system for a new facility is discussed. Many types of compressors are available ... |
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| Optical and Mechanical Characterization of Spin-On Deposited Silicon and Titanium Dioxide Films, |
MAR 1992 |
|
| Authors:
P. Shen; M. J. Li; S. I. Najafi; J. F. Currie; R. Leonelli; ECOLE POLYTECHNIQUE MONTREAL (QUEBEC)
|
| Spin-on deposited Sio2-TiO2 thin films (pure and doped with dyes) are produced. Their optical and mechanical properties are determined and their use for a number of applications is investigated. The spin-on deposited SiO2 film has been successfully doped with coumarin as a colour center and characterized as a waveguide overlay. Solution deposited thin films of silicon and titanium dioxide, and their mixtures, are suitable for a number of applications such ... |
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| Effectiveness and Hazards of Using Dry Ice to Cool a Casualty Bag |
MAR 92 |
|
| Authors:
Randall J. Osczevski; J. F. Tremblay-Lutter; DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)
|
| A small, battery-powered fan heater charged with dry-ice was used in the air space of a casualty bag. The cooling power averaged less than 50 watts. In a hot environment, more than twice this cooling power is needed. When the carbon dioxide was allowed to leak into the airspace the concentration rose to a level that would be uncomfortable but not toxic.... Air conditioning, Carbon dioxide, Casualties, Cooling, Diffusion, Hazards, ... |
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| Air Situation Establishment in a Mobile Multisensor Environment, |
MAR 1992 |
|
| Authors:
C. Rivierre; M. Desbois; THOMSON-CSF BAGNEUX (FRANCE)
|
| This paper applies to the impact of the mobility concept on a Air Command and control system. The subject is limited to the air picture establishment. Various aspects linked with mobility are pointed out as Well as solutions to handle the additional difficulty at the data fusion level. These solutions are based on an original experience, on experiment results, and on study work. Advanced system capabilities which make more intensive ... |
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| Diagnostic Expert Systems Use in the United States Navy |
MAR 92 |
68 pages |
| Authors:
Robert J. Ivey Jr; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| These thesis examines the use of expert systems for equipment diagnostics in the Navy. Diagnostic expert systems have the potential to significantly improve fleet readiness by ensuring quick and efficient repair of downed equipment. This thesis provides a brief explanation of expert systems and a look at their core components. It looks at how the Army, Air Force, and industry are using diagnostic expert systems. It describes several diagnostic expert ... |
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| An Overview of the Copernicus C4I Architecture |
MAR 92 |
143 pages |
| Authors:
Rebecca D. Dearborn; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The purpose of this thesis is to provide the reader with an overview of the U. S. Navy's Copernicus C41 Architecture. The acronym C41 emphasizes the intimate relationship between command, control, computers, communications, and intelligence, as well as their significance to the modern day warrior. Never in the history of the U. S. Navy has the importance of an extremely flexible C41 architecture been made more apparent than in the ... |
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| Individual Particle Analysis of the Springtime Arctic Aerosol, 1983-1989, |
MAR 1992 |
|
| Authors:
Patrick J. Sheridan; Russell C. Schnell; Jonathan D. Kahl; COLORADO UNIV AT BOULDER
|
| During the springs of 1983, 1986 and 1989, the Arctic Gas and Aerosol Sampling Program (AGASP) conducted major aircraft-based field experiments over much of the western Arctic. As part of the AGASP research efforts, several regions of the springtime Arctic atmosphere were probed by the NOAA WP-3D Orion research aircraft. These included the marine boundary layer over open water, the surface inversion layer over the pack ice, the background free ... |
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| The Toolik Lake Project: Terrestrial and Freshwater Research on Change in the Arctic, |
MAR 1992 |
|
| Authors:
J. E. Hobbie; B. J. Peterson; G. R. Shaver; MARINE BIOLOGICAL LAB WOODS HOLE MA
|
| The Toolik Lake research project in the foothills of the North Slope, Alaska, has collected data since 1975 with funding from the NSFs Division of Polar Programs and from the Long Term Ecological Research Program and Ecosystems Research Program of the Division of Biotic Systems and Resources. The broad goal is to understand and predict how ecosystems of tundra, lakes, and streams function and respond to change. One specific goal ... |
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| Arctic Haze and Air Pollution, |
MAR 1992 |
|
| Authors:
Jozef M. Pacyna; G. E. Shaw; ALASKA UNIV FAIRBANKS GEOPHYSICAL INST
|
| Arctic haze is the phenomenon of large-scale industrial air pollution found all through the arctic air mass. Vertical profiles of air concentrations, obtained during several aircraft measurement programs in the Arctic, have offered the following explanation of arctic haze origin. Very long range, episodic transport of air masses over several thousand kilometers clearly affects the quality of arctic air during both summer and winter. Polluted air masses, carrying a mixture ... |
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| Bromine and Surface Ozone Atmospheric Chemistry at Barrow, Alaska During Spring 1989, |
MAR 1992 |
|
| Authors:
W. T. Sturges; R. C. Schnell; S. Landsberger; COLORADO UNIV AT BOULDER
|
| Measurements were made of surface ozone, particulate bromine and organic gaseous bromine species at Barrow, Alaska during March and April 1989 with a view to examining the causes of surface ozone destruction during the arctic spring. It was found that during major ozone depletion events (03 < 25 ppbv) concentrations of particulate bromine and the organic brominated gases bromoform and dibromo-chloromethane were elevated. A fast production rate of particulate bromine ... |
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| Deposition of Metals from the Atmosphere at the North Pole Compared to Background Regions of the Northwestern USSR, |
MAR 1992 |
|
| Authors:
V. N. Adamenko; K. Ya Kondratyev; S. A. Sinyakov; LENINGRAD HIGHER MARINE ENGINEERING COLL (USSR)
|
| An intercomparison of dry and wet deposition of heavy metals and a number of trace elements has been made on the basis of the analysis of snow samples for Ladoga and Onega lakes as well as for the central Arctic. A comparative assessment of contributions to lake pollution (Great Lakes included) due to atmospheric deposition and river runoff has been given. Annual variations in the deposition of heavy metals due ... |
|
| A Decision-Theoretic Approach to Recommending Action in the Air-to- Ground Aircraft of the Future |
MAR 92 |
187 pages |
| Authors:
Garrison H. Flemings; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| Designers of air-to-ground fighters of the future should consider including decision support systems to relieve pilots of some of the present workload. Those decision support systems should use utility theory. This work reviews two techniques of utility theory (decision trees and influence diagrams) and a new technique due to Morlan (probability ratio nets). The work includes a proposed structure for action recommendation systems in air-to-ground fighters of the future. The ... |
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| A Survey of Air Force Computer-Based Training (CBT) Planning, Selection, and Implementation Issues |
MAR 92 |
12 pages |
| Authors:
William J. Walsh; Patricia J. Yee; Sherilyn A. Grozier; Elizabeth G. Gibson; Steven A. Young; MEI ASSOCIATES INC SAN ANTONIO TX
|
| The purpose of this research was to investigate the procedures, issues and problems associated with the development and use of computer-based training by the Air Force. Aspects of computer-based training investigated include the planning of projects, project management to include personnel management, computer-based training development procedures and the effective use of computer-based training. A nonrandom sample of Air Force computer-based training experts (N = 253) from 51 organizations completed an ... |
|
| Automated Software Generation Approaches for the Design and Development of Guidance and Control Systems Software (Les Differentes Approches Generation pour la Conception et le Developpement de Logiciels de Guidage et de Pilotage) |
MAR 92 |
|
| Authors:
Edwin B. Stear; ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRAN CE)
|
| This Advisory Report summarises the findings and conclusions of Working Group 10 of the Guidance and Control Panel of AGARD, the Terms of Reference which were: (1) To develop and consider a set of requirements for application software generators for guidance and control systems. (2) To evaluate the characteristics and capabilities offered by existing application software generator technology with respect to the requirements defined in (i). (3) If required, to ... |
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| Statistics on Aircraft Gas Turbine Engine Rotor Failures That Occurred in U.S Commercial Aviation During 1988 |
MAR 92 |
30 pages |
| Authors:
R. A. DeLucia; B. C. Fenton; E. R. Chapdelaine; FEDERAL AVIATION ADMINISTRATION TECH- NICAL CENTER ATLANTIC CITY NJ
|
| This report presents statistical information relating to gas turbine engine rotor failures which occurred during 1988 in U.S. commercial aviation service use. Four hundred and thirteen failures occurred in 1988. Rotor fragments were generated in 175 of the failures, and of these 14 were uncontained. The predominant failure involved blade fragments, 95 percent of which were contained. Five disk failures occurred and all were uncontained. Forty-two percent of the 413 ... |
|
| Department of Defense Training Technology Technical Group (T2TG) Minutes and Briefings of 6th Meeting |
MAR 92 |
359 pages |
| Authors:
Robert J. Seidel; ARMY RESEARCH INST FOR THE BEHAVIORAL AND SOCIAL SCIENCES ALEXANDRIA VA
|
| The sixth meeting of 2TG was held on 24-25 Mar 92, at Phoenix AZ. It was hosted by Armstrong Laboratory Williams AFB. Dr. William Howell, AL/HRD spoke about situational awareness as it relates to aircrew performance. Mr. Denis Breglia, NTSC, described issues surrounding development and use of virtual environments as training technologies. Dr. Michael Drillings, USARI, discussed findings of ARI sponsored National Research Council reports on value of non- mainstream ... |
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| Optimal Guidance Anticipating Missile Performance, |
MAR 1992 |
|
| Authors:
W. Grimm; K. H. Well; DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V WESSLING (GERMANY F R)
|
| Two different guidance methods are designed for the pre-launch phase in a one-versus-one air combat situation with missiles. In both guidance schemes a missile/target simulation is performed to estimate the miss distance at the end of a fictitious missile launch. A way to do this in real time is described. The first guidance method continuously evaluates the miss distance for each aircraft against the respective opponent. The guidance is such ... |
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| ICAAS Piloted Simulation Evaluation, |
MAR 1992 |
|
| Authors:
R. P. Meyer; R. J. Landy; D. J. Halski; MCDONNELL AIRCRAFT CO ST LOUIS MO
|
| This paper describes the Integrated Control and Avionics for Air Superiority (ICAAS) piloted simulation evaluations, along with the system development leading up to the simulations and the data analysis plan for evaluating simulation results. The ICAAS advanced development program is sponsored by the United States Air Force Wright Laboratory at Wright Patterson Air Force Base, Ohio. A research and development contract was awarded to the McDonnell Aircraft Company, St. Louis, ... |
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| Knowledge-based Planning for Controlled Airspace Flight Operation as Part of a Cockpit Assistant, |
MAR 1992 |
|
| Authors:
T. Prevot; R. Onken; H. L. Dudek; UNIVERSITAET DER BUNDESWEHR MUENCHEN NEUBIBERG (GERMANY F R)
|
| A knowledge based computer aid for flight planning tasks as part of a Cockpit Assistant for IFR (Instrument Flight Rules) operation is presented in detail after a brief overview of the modular structure of the Cockpit Assistant has been given. Based upon the requirements of air traffic management the system is aimed at supporting the pilot in complex planning and decision situation. By assessing the situation flight goal conflicts are ... |
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| On Board Planning of 4D Trajectories, |
MAR 1992 |
|
| Authors:
V. Adam; R. Kohrs; DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V BRUNSWIC K (GERMANY F R)
|
| The evolution of present day Air Traffic Management (ATM) towards an integrated Air Traffic Management will lead to the introduction of computer based planning systems on the ground side, which communicate with advanced Flight Management Systems onboard the aircraft via automatic data link. An experimental Flight Management System (EFMS) is under development in the frame of the PHARE program for research into future ATM concepts. This EFMS will have the ... |
|
| Source Emission Testing of the Munitions Deactivation Furnace, Kadena Air Base, Okinawa, Japan |
MAR 92 |
38 pages |
| Authors:
Paul T. Scott; ARMSTRONG LAB BROOKS AFB TX OCCUPATIONAL AND ENVIRONMENTAL HEALTH DIRECTORATE *
|
| Source emission testing for total lead and particulates was conducted on the munitions deactivation furnace located in the 400th Munitions Squadron area of Kadena Air Base, Okinawa, Japan. Test results indicate that if most state or EPA standards were to apply, the munitions incinerator would exceed these standards. Total lead is also high, but there are no appropriate standards in which to compare. Recommendations are made as to the munitions ... |
|
| Active Control of Pressure, Sound and Velocity of Centrifugal Pumps |
MAR 92 |
117 pages |
| Authors:
D. G. Tse; J. S. Sabnis; H. McDonald; James H. Whitelaw; SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT
|
| Measurements of velocity, pressure and sound have been obtained in a centrifugal pump with a four blade impeller rotating at speeds between 1470 rpm and 3510 rpm to improve understanding of noise generation and to investigate the feasibility of reducing fluid dynamic noise with active control. The velocity results show flow separation in the region near the shroud wall and at the suction surface of the blades with the flow ... |
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| The Effects of Team Leader Feedback on Situation Assessment in Distributed Anti-Air Warfare Teams |
MAR 92 |
69 pages |
| Authors:
Mark J. Gough; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Situation assignment is the first step in the command and Control Process. In naval tactical teams, it has become more critical even as it has become more difficult. Part of the Navy's attempt to address this issue is the Tactical Decision Making Under Stress (TADMUS) program. Under TADMUS, the Situation Assessment In Naval Teams(SAINT) experiment was run at NPS in December, 1991. This thesis describes the SAINT experiment and uses ... |
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| A Computer Based Educational Aid for the Instruction of Combat Modeling |
27 FEB 92 |
219 pages |
| Authors:
Richard S. Moore; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| The Air Force Institute of Technology is one of few institutions that teaches combat modeling. Combat models are typically dynamic computer simulations of specialized dynamic processes. Great difficulty exists in portraying these dynamic and recurrent processes with conventional static diagrams. This thesis produced a computer-based instructional aid which presents animated examples of processes common to combat models, demonstrates a simple few-on-few aerial combat model, and encourages student exploration and interaction ... |
|
| Microcalorimetric Study of the Aging Reactions of Atomized Magnesium Powder |
20 FEB 92 |
21 pages |
| Authors:
Robert G. Shortridge; Aton Chin; Bill R. Hubble; NAVAL SURFACE WARFARE CENTER CRANE IN CRANE DIV
|
| Magnesium powder is used widely as a fuel in pyrotechnic compositions, e.g., in illuminating flare formulations. Powdered magnesium chemically is a very reactive metal and it is prone to undergo relatively slow surface reactions at room temperature with moist air. In this study the technique of microcalorimetry has been used to characterize these undesired magnesium degradation reactions. Experiments have been carried out using large magnesium samples to simulate a storage ... |
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| Solid State Research |
15 FEB 92 |
|
| Authors:
Alan L. McWhorter; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
|
| This report covers in detail the research work of the Solid State Division at Lincoln Laboratory for the period 1 November 1991 through 31 January 1992. The topics covered are Electrooptical Devices, Quantum Electronics, Materials Research, Submicrometer Technology, High Speed Electronics, Microelectronics, and Analog Device Technology. Funding is provided primarily by the Air Force, with additional support provided by the Army, DARPA, Navy, SDIO, NASA, and DOE. |
|
| Qualification Testing of the CNU-502/E Container for the BSU-93/B retarders (FINS) |
14 FEB 92 |
48 pages |
| Authors:
Keith A. Vossler; AIR FORCE PACKAGING EVALUATION ACTIVITY WRIGHT-PATTERSON AFB OH
|
| The objective of this test series is to qualify the CNU-502/E container for production release by ASD/YJA. The CNU-502/E is a reusable, welded aluminum, controlled breathing style container with a removable cover. The container is designed to hold up to six BSU-93/B, air inflatable retarders (fins). The fins are aligned vertically with the fins up and the fin wiring orientated towards the container sidewalls for servicing. As tested, the two ... |
|
| The Loss of the Philippine Bases: Effects on USCINCPAC's Ability to Employ His Forces |
13 FEB 92 |
47 pages |
| Authors:
Richard B. Southard Jr; NAVAL WAR COLL NEWPORT RI DEPT OF OPERATIONS
|
| The major United States bases in the Republic of the Philippines, Subic Bay Naval Base and Clark Air Base, have been indispensable pillars of American foreign policy in the Pacific and Indian Ocean areas since the turn of the century. They have provided vital support to American military operations throughout the Pacific theater. As a result of the eruption of Mount Pinatubo, however, Clark Air Base has now been vacated. ... |
|
| Detecting Microwave Emissions from Terrestrial Sources: A Feasibility Study |
01 FEB 92 |
14 pages |
| Authors:
Thomas C. Ehlert; Thomas K. Ishii; MARQUETTE UNIV MILWAUKEE WI
|
| A Dicke receiver has been designed and constructed in our effort to detect the 22 GHz spontaneous emission from water vapor. The receiver compares the brightness temperatures of two waveguides, one containing gaseous H20 at low pressure, the other containing dry air. Each waveguide is terminated with polished brass, which provides a low background brightness temperature, at one end and connects to the input of the receiver at the other ... |
|
| Franck-Condon Factors, R-Centroids Electronic Transition Moments, and Einstein Coefficients for Many Nitrogen and Oxygen Band Systems |
01 FEB 92 |
134 pages |
| Authors:
F. R. Gilmore; R. R. Laher; P. J. Espy; LOGICON R AND D ASSOCIATES LOS ANGELES CA
|
| Air fluorescence models require accurate Franck-Condon factors and Einstein coefficients for analyzing the intensities of nitrogen and oxygen atom emissions produced by electron bombardment of air, such as in the aurora, high- altitude nuclear explosions, and rocket-borne electron gun experiments. In our previous report, improved vibrational and rotational constants based on the latest available spectroscopic measurements for several excited and ionic states important in air fluorescence modeling were derived. These ... |
|
| Intelligent Tutoring Systems: Report of One Year Sabbatical Leave in the USA |
FEB 92 |
|
| Authors:
J. G. Van der Arend; FYSISCH EN ELEKTRONISCH LAB TNO THE HAGUE (NETHERLANDS)
|
| This report gives an overview of my sabbatical year in the USA from September 1990 until September 1991. For almost four months, I worked on the ISTS project at the Embry-Riddle Aeronautical University (ERAU) in Daytona Beach, Florida. The ISTS (Intelligent Simulation Training System) is a g system for the air traffic controler using artificial intelligence techniques. I have developed a limited prototype of the ISTS on the Sun SPARCstation ... |
|
| JANNAF Propulsion Meeting Held in Indianapolis, Indiana on February 24 - 27, 1992. Volume 1 |
FEB 92 |
|
| Authors:
Debra S. Eggleston; CHEMICAL PROPULSION INFORMATION AGENCY COLUMBIA MD
|
| This volume, the first of four volumes, is a collection of 60 unclassified/unlimited distribution papers which were presented at the 1992 Joint Army-Navy-NASA-Air Force (JANNAF) Propulsion Meeting, held 24-27 February 1992 at the Westin Hotel and Fort Benjamin Harrison in Indianapolis, Indiana. Specific subjects discussed include solid propellant grain nozzle flow field analysis, hypersonic propulsion, solid and liquid propellant guns, liquid rocket engine and component development, thrust vector control, rocket ... |
|
| Crack Growth Processes at Elevated Temperatures in Advanced Materials |
FEB 92 |
251 pages |
| Authors:
David L. Davidson; Kwai S. Chan; James Lankford; SOUTHWEST RESEARCH INST SAN ANTONIO TX
|
| Research in this program during the past 3 years has fracture studies on intermetallic alloys. Most of the work was focused on alloys based on the intermetallic compounds Ti3Al and TiAl, but some work to characterize alloys based on Nb3Al was also accomplished. The mechanisms controlling fatigue and fracture toughness of these new materials have been determined and compared to similar knowledge for other alloys. For a TiAl alloy with ... |
|
| Aerothermodynamics of Nozzle Flows for Advanced Hypersonic Propulsion Systems, |
FEB 1992 |
|
| Authors:
C. Weiland; G. Hartmann; S. Menne; MESSERSCHMITT-BOELKOW-BLOHM G M B H MUNICH (GERMANY F R)
|
| One of the major tasks for the development of novel airbreathing space transportation systems, operating from usual airports by horizontal take off and landing, is the integration of an advanced propulsion system in the cell of that spacecraft. The air intake and in particular the free expansion nozzle affect not only the efficiency of the engine but also severely the forces and moments, and with that the control, of the ... |
|
| Responding to a Changing World |
FEB 92 |
31 pages |
| Authors:
John H. Campbell; AIR WAR COLL MAXWELL AFB AL
|
| The changes in the world since the demise of the Soviet Union have significantly altered the environment in which the United states seeks to achieve its national objectives. While the threat to the survival of the U.S. has diminished, new and less predictable threats to other of the U.S.'s national interests have emerged. Airpower is uniquely suited to deal with the changing world; an examination of objectives, strategy, doctrine, force ... |
|
| Comparison of Air Photo Landform Units to Statistically Defined Groups of Tors in Dartmoor, Southwest England |
FEB 92 |
42 pages |
| Authors:
Judy Ehlen; ARMY TOPOGRAPHIC ENGINEERING CENTER FORT BELVOIR VA
|
| Landform mapping units delineated using manual photo analysis procedures on two air photo mosaics, one at a scale of 1:24,000 and the other at 1:50,000, were compared to groups of tors defined using multivariate statistical analysis of field and laboratory data. Correspondence between the results of the two procedures was quite good: (1) members of most tor groups occur in the same landform mapping unit; (2) most landform mapping units ... |
|
| Nonequilibrium 3D Flows of Air through Inlets, |
FEB 1992 |
|
| Authors:
Roberto Marsilio; Maurizio Pandolfi; POLITECNICO DI TORINO (ITALY)
|
| The hypersonic nonequilibrium flow of air through inlets of propulsion devices is investigated. The fluid dynamics is described by the Euler equations and a chemical model accounts for finite rate equations. The numerical procedure is based upon a space-marching technique, under the hypothesis of fully developed supersonic flow. The conservative form of the Euler and finite-rate chemical equations are integrated, following a finite volume discretization and a flux-difference splitting procedure. ... |
|
| Area-of-Interest Display Resolution and Stimulus Characteristics Effects on Visual Detection Thresholds |
FEB 92 |
34 pages |
| Authors:
Harold D. Warner; David C. Hubbard; Gary Serfoss; DAYTON UNIV OH RESEARCH INST
|
| An investigation was conducted to examine the effects of area-of- interest (AOI) display resolution and various stimulus characteristics on visual detection thresholds using the limited Field-of-View Dome (LFOVD) visual simulation system located at the Aircrew Training Research Division, Human Resources Directorate of the Armstrong Laboratory at Williams Air Force Base, Arizona. Two levels of AOI resolution, which was defined as the width of the line spread function at 50% of ... |
|
| Controller Memory Enhancement: Field Facility Concepts and Techniques |
FEB 92 |
80 pages |
| Authors:
Stan Gromelski; Laurie Davidson; Earl S. Stein; PERI INC PRINCETON NJ
|
| This report presents the results of the second year's efforts in a 3- year project to study the role of memory in air traffic control activities. The goal of the research is to improve controller performance of tasks where memory is a critical element. The specific goals of this research were to identify memory aids currently in use and to explore the techniques that controllers use to manage memory. This ... |
|
| Mobile Electric Power |
30 JAN 92 |
30 pages |
| Authors:
Valerie J. Bloomfield; David P. Bloomfield; Bradley Q. Johnson; ANALYTIC POWER CORP BOSTON MA
|
| Analytic Power has proven the feasibility of a mobile electric power unit in the form of a hydride fueled ion-exchange membrane (IEM) fuel cell stack. We have over 5 years experience building and testing IEM fuel cells. The power section of a 350 watt fuel cell stack weighs 4.65 pounds based on our five cell sub-stack component weights. The composite stack structure is fabricated from two components; a unitized flow ... |
|
| Neuropsychological Components of Object Identification |
10 JAN 92 |
33 pages |
| Authors:
Stephen M. Kosslyn; HOWARD UNIV WASHINGTON DC
|
| Four kinds of investigations of the structure of high-level visual processing were conducted during the past year. First, we carried out case studies of individual brain-damaged patients, finding evidence that curved edges are processed separately from straight edges, that location information sometimes can be used to encode some characteristics of shape, and that a decrease in overall activation level can selectively impair performance on some tasks. Second, we administered a ... |
|
| Stress Corrosion Susceptibility of Ultra-High Strength Steels for Naval Aircraft Applications |
10 JAN 92 |
48 pages |
| Authors:
Joseph Kozol; Charles E. Neu; NAVAL AIR WARFARE CENTER AIRCRAFT DIV WARMINSTER PA AIR VEHICLE AND CREW SYST EMS TECHNOLOGY DEPT
|
| Low alloy quenched and tempered steels used in current Naval aircraft applications, particularly the ultrahigh strength steels used in landing gear, have characteristically small critical flaw sizes and extreme susceptibility to stress corrosion cracking in a shipboard environment. Newly developed steels which develop ultrahigh strengths with secondary hardening based on precipitation of M2C carbides offer significantly larger critical flaw sizes; and while susceptible to stress corrosion cracking, their susceptibility is ... |
|
| United States Air Force Summer Research Program 1991. Graduate Student Research Program (GSRP) Reports. Volume 9. Wright Laboratory |
09 JAN 92 |
722 pages |
| Authors:
Gary Moore; RESEARCH AND DEVELOPMENT LABS CULVER CITY CA
|
| This program was started in 1982 as an adjunct to the SFRP. Its objectives are to permit graduate students to participate in research under the direction of a faculty member at an Air Force laboratory; stimulate professional association among graduate students, their supervising professors, and professional peers in the Air Force; to further research objectives of the Air Force; and to expose graduate students to potential thesis topics in areas ... |
|
| An Evaluation of Macro Methodologies Used by OSD and the United States Air Force to Estimate Acquisition Support Funding for New Aircraft Systems |
JAN 92 |
92 pages |
| Authors:
John M. Wallace; LOGISTICS MANAGEMENT INST BETHESDA MD
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| This research evaluates Initial Spares estimating methods used by OSD and the Air Force. Two macro estimating approaches were studied: factor based approaches that use historical percent of flyaway cost to estimate Initial Spares funding for new aircraft and the Logistics Support Cost (LSC) model - a detailed build-up method that uses aircraft equipment and operational characteristics to estimate Initial Spares. Findings: (1) Factor based approaches ignore important considerations that ... |
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| Quality Control of Meteorological Observations |
JAN 92 |
26 pages |
| Authors:
Nancy L Baker; NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB MONTEREY CA
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| Quality control of meteorological observations Is an Integral part of atmospheric analysis and prediction, since erroneous observations can adversely impact the accuracy of these environmental products. The meteorological observations are subjected to various validation and error checks, as described In this report, prior to their storage In an operational atmospheric data base at the Fleet the Numerical Oceanography Center (FNOC). The operational atmospheric data base Is used by the Navy's ... |
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