Abstract:NEW MATERIALS ARE BEING DEVELOPED EVERYDAY AND ARE REVOLUTIONIZING PRODUCTS AND PROCESSES AT AN ASTOUNDING RATE. IN RECENT YEARS, THE ROADSIDE SAFETY APPURTENANCE FIELD HAS BEEN AFFECTED AS WELL, AS NEW MATERIALS HAVE BEEN APPLIED TO PRODUCE IMPROVED DESIGNS IN A VARIETY OF SITUATIONS. IN RECENT… more
Abstract:THE DEVELOPMENT OF A MANUFACTURING TECHNOLOGY THAT ALLOWS THE OPTIMIZATION OF THE MECHANICAL AND SUPERCONDUCTING PROPERTIES OF BULK CONDUCTORS IS CRUCIAL FOR THEIR IMPLEMENTATION IN AEROSPACE POWER TRANSMISSION AND PROPULSION APPLICATIONS. STATE-OF-THE-ART PROCESSING OF BULK HIGH TEMPERATURE… more
Abstract:METALORGANIC MOLECULAR BEAM EPITAXY (MOMBE) IS A SEMICONDUCTOR GROWTH TECHNIQUE THAT HAS THE POTENTIAL FOR COMBINING THE BEST FEATURES OF MOLECULAR BEAM EPITAXY WITH THOSE OF ORGANOMETALLIC VAPOR PHASE EPITAXY (OMVPE). A MAJOR PROBLEM HINDERING DEVELOPMENT OF MOMBE TECHNIQUES FOR GROWING GROUP III/V… more
Abstract:FERROELECTRIC MATERIALS SUCH AS BARIUM TITANIUM OXID (BARIO3) HAVE ELECTRO-OPTIC COEFFICIENTS THAT ARE AN ORDER OF MAGNITUDE GREATER THAN THAT OF THE MORE COMMON LITHIUM NIOBIUM OXIDE (LINBO3). THEIR SUPERIOR POTENTIAL HAS NOT BEEN EXPLOITED BECAUSE THE ROUTINE GROWTH OF LARGE DEFECT-FREE OPTICAL… more
Abstract:OVER THE PAST DECADE STUDIES HAVE INDICATED THAT IT IS POSSIBLE TO UTILIZE THE ULTRAFAST (PICOSECOND) RESPONSE TIMEOF A PHOTOCONDUCTOR TO DETECT AND TIME RESOLVE THE RAPID VARIATIONS OF LIGHT FROM A RAPIDLY CHANGING SOURCE SUCH AS APULSED LASER, A LASER FUSION EXPERIMENT, A DIRECTED ENERGY WEAPON OR… more
Abstract:A PRIMARY LIMITATION OF PHOTOELECTROCHEMICAL CELLS IS PHOTOCORROSION OF ELECTRODE MATERIALS. ONE SOLUTION TO THISPROBLEM HAS BEEN TO APPLY ELABORATE CONDUCTING POLYMERIC COATINGS TO SENSITIVE ELECTRODES. AN ALTERNATIVE IS TO USE CORROSION RESISTANT ELECTRODE MATERIALS. GROUP VI METAL DICHALCOGENIDES… more
Abstract:RECYCLING SPENT NUCLEAR FUEL IS AN ECONOMIC NECESSITY FOR THE INTEGRAL FAST REACTOR. AFTER THE FISSION PRODUCTS HAVE BEEN REMOVED, THE IRRADIATED URANIUM FUEL MATERIAL CAN BE CAST INTO NEW FUEL RODS. THE CURRENT INJECTION CASTING PROCESS USES QUARTZ MOLDS THAT ARE NOT REUSABLE, SINCE THE MOLDS MUST… more
Abstract:THE DISCOVERY OF THE NEW HIGH TEMPERATURE SUPERCONDUCTING (HTSC) OXIDES COUPLED WITH THE ADVENT OF DIAMOND THIN FILM GROWTH BY CHEMICAL VAPOR DEPOSITION TECHNIQUES HAVE OPENED UP THE POSSIBILITY OF A HIGH TEMPERATURE SUPERCONDUCTING TRANSITION EDGE BOLOMETER FOR USE AT SUBMILLIMETER WAVE LENGTHS.… more
Abstract:LOW GROWTH TEMPERATURES ARE ESSENTIAL FOR THE METAL-ORGANIC CHEMICAL VAPOR DEPOSITION (MOCVD) OF ABRUPT HETEROJUNCTION DEVICES FABRICATED FROM MERCURY CADMIUM TELLURIDE. UNSYMMETRICAL TELLURIDES (RTER< >1D) REPRESENT A NOVEL ALTERNATIVE TO THE NON-OPTIMAL SOURCE REAGENTS CURRENTLY IN USE. THESE… more
Abstract:THE KEY TO THE COMMERCIAL PRODUCTION OF DEVICES FABRICATED FROM SUPERCONDUCTORING THIN FILMS WITH OPTIMAL AND REPRODUCIBLE PROPERTIES IS THE IDENTIFICATION OF A PROCESS THAT HAS EXACT CONTROL OF STOICHIOMETRY AND MORPHOLOGY. THIS CONTROL CAN ONLY BE ACHIEVED WITH A THOROUGH UNDERSTANDING OF THE… more
Abstract:RECENT DEVELOPMENTS IN OPTICAL COMMUNICATION TECHNOLOGY ARE VERY ENCOURAGING FOR THE POTENTIAL OPERATION OF OPTICAL SATELLITE CROSSLINKS. MOST NOTABLE IS THE DEVELOPMENT OF HIGH EFFICIENCY ND:YAG RING LASERS WHICH WOULD BE ATTRACTIVE TRANSMITTERS IF WIDE BANDWIDTH EXTERNAL PHASE MODULATORS COULD BE… more
Abstract:HIGH POWER SEMICONDUCTORS USING SILICON AND GAAS ARE LIMITED TO ENVIRONMENTS THAT ARE LESS THAN 300 DEG C IN TEMPERATURE DUE TO LOW BANDGAPS, LOW BREAKDOWN FIELDS AND LOW THERMAL CONDUCTIVITIES. 3C-SIC(B-SIC) HAS BEEN IDENTIFIED AS A MATERIAL WITH EXCELLENT POTENTIAL TO FULFILL THE REQUIREMENTS OF A… more
Abstract:THE REPRODUCIBLE CRYSTAL GROWTH OF THIN FILMS WITH THE CORRECT STOICHIOMETRY AND APPROPRIATE MORPHOLOGY IS THE KEY TO THE COMMERCIALIZATION OF DEVICES INCORPORATING THIN FILM HIGH TEMPERATURE SUPERCONDUCTORS. MOCVD HAS THE POTENTIAL TO MEET THESE NEEDS COUPLED WITH RELATIVE EASE OF SCALING… more
Abstract:A NOVEL DIAMOND DETECTOR FOR USE IN THE SOFT X-RAY TO THE VACUUM ULTRAVIOLET IS PROPOSED. THIS X-RAY DETECTOR IS BASED ON THE USE OF A DIAMOND FILM AS THE ACTIVE DETECTOR ELEMENT DUE TO DIAMOND'S HIGH INTRINSIC RESISTIVITY (LOW DARK CURRENT), LARGE CARRIER MOBILITIES, HIGH SATURATEDCARRIER DRIFT… more
Abstract:ULTRAFAST SOLID STATE PHOTOCONDUCTIVE SWITCHES MAY NOW MAKE POSSIBLE PULSED ELECTRIC FIELDS ON THE ORDER OF 1GV/M ON TIME SCALES OF 1-100 PICOSECONDS. VOLTAGE GRADIENTS OF THISMAGNITUDE ARE BECOMING POSSIBLE THROUGH ADVANCES IN TRANSMISSION LINE DESIGN AND ULTRAFAST PHOTOCONDUCTIVE POWERSWITCHING… more
Abstract:WE PROPOSE TO DEVELOP NOVEL INORGANIC SCINTILLATING FIBERS FOR USE IN IONIZING RADIATION IMAGING DETECTORS FOR RESEARCH, MEDICINE AND INDUSTRY, ESPECIALLY IN APPARATUS FORIMAGING X-RAYS, BETA AND ALPHA PARTICLES. IN PHASE I WE WILL USE METAL-ORGANIC CHEMICAL VAPOR DEPOSITION TECHNOLOGY TO COAT… more
Abstract:THE USE OF OPTICAL SYSTEMS IN HIGH SPEED SIGNAL PROCESSING APPLICATIONS IS DESTINED BECAUSE OF THE OVERWHELMING ADVANTAGES OF PARALLEL DATA TRANSMISSION. MANY APPLICATIONS REQUIRE NONLINEAR TRANSFORMATIONS TO BE PERFORMED IN PARALLEL AT HIGH SPEED AND RESOLUTION. THE USE OF ORGANIC MATERIALS WITH… more
Abstract:MERCURY CADMIUM TELLURIDE (MCT) ALLOYS ARE OF MAJOR IMPORTANCE FOR NONCRYOGENICALLY COOLED 1.0 TO 16.0 MU M (IR)DETECTOR ARRAYS. WIDESPREAD DEPLOYMENT OF MCT ARRAYS BASED ON HIGH SENSITIVITY PHOTODIODES HAS BEEN SLOWED BY THE DEARTH OF REPEATABLE GROWTH PROCESSES CAPABLE OF PRODUCING HIGH QUALITY… more
Abstract:WIDESPREAD APPLICATION OF HIGH PERFORMANCE DEVICES BASED ON III-V, IV-IV, OR DIAMOND COMPOUND SEMICONDUCTORS WILL DEPEND ON THE DEVELOPMENT OF MANUFACTURING METHODS. RECENTLY, DR. MAX YODER OF ONR PROPOSED A RADICALLY NEW GROWTH SEQUENCE APPLICABLE TO THE GROUP IV SEMICONDUCTORS IN GENERAL AND TO… more
Abstract:SOLID METAL FUELS CAN PROVIDE GREATER THRUST AND FUEL EFFICIENCY THAN LIQUID FUELS. BORON PARTICLES, A MOST ATTRACTIVE SOLID FUEL ON A THERMOCHEMICAL BASIS, IGNITE UPON EXPOSURE TO MOIST AIR AND UNDERGO A RAPID COMBUSTION WITH HIGH VOLUMETRIC HEAT RELEASE. UNFORTUNATELY, THIS REACTION IS… more
Abstract:THE USE OF SUPERCONDUCTING RADIO FREQUENCY (SRF) CAVITIES IN ELECTRON ACCELERATORS CAN BE DRAMATICALLY EXTENDED WITH THE UTILIZATION OF HIGH TEMPERATURE SUPERCONDUCTORS (HTSC). WITH CRITICAL MAGNETIC FIELDS OF APPROXIMATELY 11,000 OE AT 2K OR 4 TIMES NIOBIUM, HTSCS OFFER THE POTENTIAL OF… more
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