Abstract:The dolphin has a unique sonar capability by which it produces high-frequency clicks. The dolphin is able to vary both the frequency content and the repetition rate of the echolocation clicks. The goal of the combined Phase I and Phase II project is to model the dolphin sonar and to design,… more
Abstract:It is the goal of Applied Optronics to develop, fabricate and package antimony alloy diode lasers capable of high power operation at wavelengths between 2 and 5 microns, and to design a practical, high performance master oscillator power amplifier (MOPA) device based on antimony alloy diode lasers.… more
Abstract:The implementation of new environmental and National Institute for Occupational Safety and Health (NIOSH) regulations due to take effect by the year 2000 make it imperative that industrial and manufacturing processing facilities take steps to monitor, characterize, and control stack emissions in… more
Abstract:Many state-of-the-art algorithms require the use of irregular computational grids. Currently no products exist that can assist the user in parallelizing such a program; however, research conducted at a number of institutes suggests methods for handling irregular problems. This proposal suggests the… more
Abstract:Warhead design calculations and weapons effectiveness estimates require a methodology to predict the terminal ballistic structural response and the associated functional damage to operating missile batteries subjected to warhead fragment impacts at speeds up to 16,000 ft/sec. The objectives for the… more
Abstract:An innovative ESM impulse detection and processing concept is described, incorporating three individual, but complementary, wideband processors used in selected combinations to provide a versatile and cost effective design which can be scaled to the anticipated battlefield or civilian environment. A… more
Abstract:A miniaturized lighter-than-air (LTA) unmanned air vehicle (UAV) is proposed as a low altitude, station keeping, optical instrumentation platform. The advanced airship design will be derived from parameters developed during the successful Small Aerostat Surveillance System, Low Intensity Target… more
Abstract:IN THIS PROJECT, THE FEASIBILITY OF COMBINING SONIC DRILLING AND CONE PENETRATION TECHNOLOGIES WILL BE EVALUATED AND A SET OF PRELIMINARY DESIGN DRAWINGS DEVELOPED. SONIC DRILLING TECHNOLOGY HAS RECENTLY BEEN DEMONSTRATED AT THE HANFORD SITE, WA. THE RESULTS OF THE DEMONSTRATION PROVED THAT SMALL… more
Abstract:ESTIMATES OF DESIGN WINDSPEEDS IN THE NONHURRICANE-PRONE REGION OF THE UNITED STATES ARE DERIVED FROM HISTORICAL RECORDS OF WINDSPEEDS OBTAINED FROM SURFACE LEVEL ANEMOMETERS. THE SURFACE-LEVEL WINDSPEED MEASUREMENTS ARE SUBJECT TO ERRORS PRODUCED BY TERRAIN EFFECTS, NEARBY STRUCTURES AND… more
Abstract:Millimeter-wave circuit design requires accurate models to optimize performance, to minimize the number of preliminary designs, and to allow design centering for uniformity and high yield reducing cost and improving reliability. Existing bipolar circuit models fail at prediction of high frequency,… more
Abstract:Electron Cyclotron Resonance (ECR) plasma technology is widely used in the etching of III-V semiconductor devices. This has enabledthe fabrication of a wide variety of high speed analog, digital, and optoelectronic devices. As the need grows for high performance devices with dimensions below 0.1… more
Abstract:Due to the lack of techniques for buried metallization in PD or multilayer metallized PD, diamond has not been used as a material for electronic packaging. The primary obstacle in buried metallization in PD or producing multilayer metallized PD is the difficulty in generating good bonding between PD… more
Abstract:BERYLLIUM IS A CANDIDATE MATERIAL FOR APPLICATIONS REQUIRING LOW DENSITY, STRENGTH, AND/OR THERMAL PERFORMANCE, SUCH AS SPACE STRUCTURES, HEAT SHIELDS, RADIATORS, AND ELECTRONICS. HOWEVER, THE USE OF BERYLLIUM IS LIMITED BY ITS MODERATE THERMAL CONDUCTIVITY AND BRITTLENESS, BOTH OF WHICH RESULT IN… more
Abstract:DIFFERENTIATING AMONG THE DENOMINATIONS OF U.S. CURRENCY IS A PROBLEM FOR THE VISUALLY HANDICAPPED. CURRENTLY AVAILABLE DEVICES THAT ASSIST THE BLIND IN DETERMINING CURRENCY DENOMINATIONS ARE RELATIVELY LARGE AND EXPENSIVE. THE PROPOSED RESEARCH AND DEVELOPMENT IS A SYSTEMATIC APPLICATION OF PATTERN… more
Abstract:DUE TO THE EFFECTIVENESS OF FIBROUS MATERIALS IN SUPPRESSING RADIATIVE ENERGY TRANSPORT, THEY ARE WIDELY USED FOR THERMAL INSULATION IN MANY ENGINEERING SYSTEMS, SUCH AS THE SPACE SHUTTLE THERMAL PROTECTION TILES, LINERS OF COMBUSTION ENGINES, FLEXIBLE HEAT SHIELDS IN REENTRY VEHICLES, ETC. OF… more
Abstract:Epitaxial growth of the aluminum gallium nitride (AlGaN) material system by molecular beam epitaxy (MBE) has been hindered by the lack of a suitable nitrogen source. The deposition of AlGaN at typical MBE growth temperatures results in nitrogen deficient films that suffer from low growth rates and… more
Abstract:The specific proposed innovation is the use of an active radiometer in place of conventional radar techniques for measuring rainfall over the earth's surface from satellite platforms. This technique provides a substantial savings in data acquisition time that can be used to increase the scan rate… more
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