Award Data

Silicon particles of miniscule dimension, so-called "quantum particles," will luminesce intensely when exposed to ultraviolet light. Using proprietary procedures, electrodes will be applied to these ultra-small quantum particles so that they may be made to electroluminesce. The process voltages will be compatible with the voltages for transistor circuitry. This work offers the promise of joining d ...

This proposal addresses the use of synthetic aperture proceseing techniques in low resolution towed array eonar eyeteme for ASW applications. The proposed approach will apply theme techniques to enhance Gignal to noise and bearing resolution despite (a) uncertainties in the knowledge of the 9onar trajectory, (b) inaccurate estimates of the speed of sound as a function of depth, and (c) unknown tar ...

Modified computer-to-memory interface architecture and memory management executive software provide substantial increases in multiprocessor system reliability and throughput. The MIL-STD-1750A computer interface has a local cache memory using 8-word pages. The common main memory has fault tolerant data and address buses and fault tolerant data storage, with a page long word length, and hardware ar ...

THE USE OF CONTINUOUS AND PULSED WAVE LASERS IN TARGET DESIGNATION AND COMBAT SITUATIONS IS INCREASING. THERE IS THEREFORE A NEED TO PROTECT COMBAT PERSONNEL AND SENSITIVE SENSING EQUIPMENT FROM ACCIDENTAL EXPOSURE TO LASER RADIATION. THE TECHNICAL OBJECTIVES OF THIS PROGRAM ARE TO DEVELOP, CHARACTERIZE AND TEST A LASER FILTER WHICH REMAINS TRANSPARENT AT AMBIENT LIGHT FLUXES, BUT WHICH COULD BE S ...

THE OVERALL OBJECTIVE OF THIS PROJECT IS TO DEMONSTRATE THE FEASIBILITY OF PREPARING LOW VISCOSITY, ROOM TEMPERATURE CURABLE, TOUGH, HIGH MODULUS EPOXY CASTING MATERIALS USING POLY(ARYL ETHER KETONES) AND POLY(ARYL ETHER SULFONE KETONE) COPOLYMERS AS IMPACT MODIFIERS. TOUGH, HIGH MODULUS CASTING MATERIALS ARE NOT AVAILABLE. AS THE MODULUS INCREASES, THE BRITTLENESS OF THE CONVENTIONAL PLASTICS ALS ...

Broad-band, dynamic (switchable), solid-state, ultrafast (sub-ns) optical shutter activated by a laser or other high intensity radiation source is provided based on novel interfaces of inorganic semiconductor (SC) electrodes with conducting polymers (CPs). The CPs, normally switched electrochemically between opaque and transparent states, are switched via direct charge transfer from photoexcitatio ...

THIS PROJECT PROPOSES TO REPAIR FATIGUE DAMAGE IN J-52 COMPRESSOR DISCS USING A NICKEL-TITANIUM "SHAPE MEMORY" ALLOY EXPANSION BUSHING. BUSHING INSERTS OF CONVENTIONAL ALLOY MATERIALS CAN RESULT IN SIGNIFICANT IMPROVEMENTS IN FATIGUE STRENGTH AT AMBIENT TEMPERATURES WHEN THE MATERIAL SURROUNDING THE BOLT HOLE IS INITIALLY COLD EXPANDED TO PLACE IT IN COMPRESSION. THE COMPRESSIVE STRESSES SO DEVELO ...

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THE WIDESPREAD PRESENCE OF CHLORINATED AND NONCHLORINATED ORGANICS IN BOTH NATURAL AND TREATED WATER AT MANY AIR FORCE BASES POSES A SERIOUS ENVIRONMENTAL AND HEALTH PROBLEM, SINCE SUCH UBIQUITOUS HALOCARBONS AS TRICHLOROETHYLENE (TCE) AND CHLOROFORM ARE CARCINOGENIC AND/OR TOXIC. CURRENTLY, THE MOST COMMON TECHNOLOGIES FOR REMOVING ORGANICS FROM GROUNDWATER ARE ACTIVATED CARBON ADSORPTION AND COU ...

Two methods for growing large beta-SiC proposed: (l) top-seeded solution growth under high pressure and (2) sublimation. We believe these two are the most promising techniques for producing large hauls, of beta-SiC, suitable for use as substrates for epitaxial growth of beta-SiC thin films. In the top-seeded solution growth method, pure silicon will be used as the solvent. The growth chamber will ...