Abstract:THE PRIMARY PURPOSE OF THIS PROJECT IS TO DETERMINE BOTH THEFEASIBILITY OF AND THE COSTS ASSOCIATED WITH A COMPREHENSIVEVALIDATION STUDY OF A COMPUTER-BASED INFORMATION AND ANALYSIS SYSTEM DESIGNED TO PROVIDE A STANDARDIZED, VALID STATEMENT OF AN INDIVIDUAL'S CAPACITY TO CARRY OUT WORK IN THE… more
Abstract:NEW, UNIQUE HIGH TEMPERATURE CERAMIC MATRIX COMPOSITES WITH LOW THERMAL CONDUCTIVITY, HIGH STRENGTH AND THERMOCHEMICAL STABILITY TO 5000 DEGREES FAHRENHEIT (2760 DEGREES CENTIGRADE) ARE A PREREQUISITE TO SIGNIFICANT ADVANCES IN HEAT SHIELD TECHNOLOGY. AVAILABLE HEAT SHIELDS INCLUDE CARBON PHENOLICS… more
Abstract:IMPROVED COPPER ALLOYS ARE DESIRED FOR RADIATION-RESISTANT HIGH HEAT-FLUX COMPONENTS AND FIRST-WALL STRUCTURES IN FUSION ENERGY SYSTEMS. SIGNIFICANT IMPROVEMENT IN COPPER ALLOYS WHICH ARE ALSO RADIATION RESISTANT CANNOT BE PROJECTED. HOWEVER, COPPER MATRIX COMPOSITES CAN BE PROJECTED TO INCREASE… more
Abstract:THERE IS A CHRONIC NEED FOR LIGHTER YET STRONGER MATERIALS FOR BOTH AMBIENT AND ELEVATED TEMPERATURE APPLICATIONS IN BOTH IAILITARY AND COMMERCIAL SECTORS. ONE REQUIREMENT IS FOR A 9OODEGF ALUMINUM FASTENER COMPATIBLE WITH ALUMINUM AND TITANIUM ALLOYS. MECHANICAL ALLOYING/RAPID SOLIDIFICATION… more
Abstract:THIS PHASE I PROJECT UTILIZES THE CORROSION RESISTANCE AND ELECTRICAL PROPERTIES OF CERTAIN ADVANCED MATERIALS IN THE DESIGN OF PROBES TO SENSE LIQUID LEVELS AT MOLTEN METAL-SALTINTERFACES AND MOLTEN SALT-GAS INTERFACES. ONE OF THE MORE SUCCESSFUL APPLICATIONS OF ADVANCED HIGH TECHNOLOGY MATERIALS… more
Abstract:A NEWLY DISCOVERED C60 CARBON MATERIAL, WHICH EXHIBITS UNIQUE ELECTROCHEMICAL AND PHYSICAL BEHAVIOR, IS BEING USED TO FABRICATE ELECTRODES BY VAPOR DEPOSITION, DRY PRESSING, AND PASTE TECHNIQUES. A SURFACE-MODIFIED C60 ELECTRODE WITHCOBALT PHTHALOCYANINE IS ALSO BEING FABRICATED. THESE ELECTRODES… more
Abstract:THE OBJECTIVE OF THE PROPOSED WORK IS TO SYNTHESIZE SILVER COATED NANOPARTICLES WHICH HAVE, AMONG OTHER NOVEL OPTICAL PROPERTIES, THE ABILITY TO GENERATE PHASE CONJUGATE LIGHT WITH LOW INCIDENT LIGHT INTENSITIES. THE EXPERIMENTAL PROGRAM CONSISTS OF TWO PARTS: 1) DETERMINING THE EXPERIMENTAL… more
Abstract:THE HEATS OF DETONATION OF ALUMINIZED EXPLOSIVES AND PROPELLANTS ARE, IN GENERAL, CONSIDERABLY HIGHER THAN FOR NON ALUMINIZED MATERIALS. HOWEVER, THE INHERENT OXIDE ON THE ALUMINUM INTERFERES WITH AND DELAYS THE DETONATION PROCESS. IT IS POSSIBLE THAT THE SUBSTITUTION OF A FLUORIDE (ALF3) COATING… more
Abstract:CURRENT CERAMIC FIBERS LOSE STRENGTH RAPIDLY ABOVE 1000-1200 C AND HAVE VERY LOW CREEP RESISTANCE THUS LIMITING THEIR APPLICATIONS IN COMPOSITES FOR MANY ADVANCED MILITARY SYSTEMS. RECENT WORK HAS DEMONSTRATED THAT GRAPHITE FIBER (3-14) TOWS CAN BE CONVERTED TO SIC WHICH RETAINS NEARLY 100% OF THEIR… more
Abstract:THE ALKALI AND ALKALINE EARTH METALS ARE TOO EXPENSIVE AND COMPLICATE SEPARATING BORON FROM THE REDUCING AGENT OXIDE, AND CARBON THAT PRODUCES A GASEOUS BYPRODUCT OXIDE ALSO REACTS WITH THE BORON TO FORM B4C. AN UNUSUAL REDUCING AGENT WHICH IS QUITE ECONOMICAL CAN REDUCE B2O3 IN THE GAS PHASE TO… more
Abstract:CHRONIC NEEDS FOR HIGHER PERFORMANCE IN PRESENT AND FUTURE ARMY ROTOCRAFT/AIR-VEHICLE SYSTEMS MANDATE IMPROVEMENTS IN MATERIALS PROPERTIES. LIGHTWEIGHT METAL MATRIX COMPOSITES (MMC) INCLUDING MAGNESIUM AND ALUMINUM ARE AMONG THE BEST CANDIDATES TO FULFILL THE REQUIREMENTS THAT ENABLE LIGHTWEIGHT… more
Abstract:NEW FIBERS ARE NEEDED TO PRODUCE INTERMETALLIC COMPOSITES FOR USE IN AERO- AND SPACE-PROPULSION SYSTEMS BECAUSE EXISTING FIBERS DO NOT HAVE ADEQUATE THERMOCHEMICAL STABILITY IN DESIRABLE STRUCTURAL MATERIALS SUCH AS IRON ALUMINIDE. FEBE5 HAS BEEN PREDICTED TO HAVE THERMOCHEMICAL STABILITY IN IRON… more
Abstract:DYSFUNCTION OF HUMAN ARTICULAR CARTILAGE DUE TO WEAR, TRAUMA, OR DISEASE, IS BECOMING AN INCREASING SOURCE OF PAIN, DISABILITY, AND HEALTH CARE EXPENDITURES. NONE OF THE PRESENTLY AVAILABLE TREATMENTS OFFERS AN ADEQUATE LONG TERM SOLUTION TO THIS PROBLEM. ELECTROMAGNETIC (EM) FIELDS HAVE BEEN… more
Abstract:DOD OPTICAL COMMUNICATION REQUIREMENTS HAVE MOVED BEYOND THE PERFORMANCE CAPABILITIES OF CONVENTIONAL FIBER OPTIC COMMUNICATION TECHNOLOGIES. CONVENTIONAL OPTICAL COMMUNICATION NETWORKS ARE LIMITED TO BASEBAND COMMUNICATION. HOWEVER, BREAKTHROUGHS IN NEW, BIREFRINGENT CRYSTAL TECHNOLOGY COMBINED… more
Abstract:LONG-TERM NASA NEEDS FOR MODELING ASTRONAUTS DURING EVA AND SPACE CONSTRUCTION ACTIVITIES REQUIRES THE DEVELOPMENT OF AN INTEGRATED SIMULATION CAPABILITY. SINCE THE ASTRONAUTE MUST WEAR RESTRICTIVE CLOTHING, THEY MUST BE MODELED IN A WAY WHICH REFLECTS THEIR LOSS OF NORMAL RANGE PERFORMANCE. THE… more
Abstract:INVESTIGATION INTO THE FEASIBILITY OF CONSTRUCTING LARGE FORMAT THINNED BACKSIDE ILLUMINATED CCDS AND CCD MOSAICS IS PROPOSED. THE PROBLEMS ASSOCIATED WITH UNIFORMLY THINNING LARGE SILICON AREAS, MOUNTING THE THINNED MEMBRANE TO A RIGID SUPPORT SUCH THAT A DESIRED OPTICAL FIGURE IS OBTAINED, AND… more
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