Abstract:WE PROPOSE TO USE TRANSPOSON-TAGGING TO ISOLATE A NUCLEAR MALE STERILE (MS) GENE FROM MAIZE. WE HAVE GENERATED EIGHT NEW MALE STERILE MUTANTS IN STOCKS CARRYING THE TRANSPOSABLEELEMENT ACTIVATOR (AC) AND WE ARE CURRENTLY ANALYZING DNA FROM THESE MUTANTS FOR THE PRESENCE OF NOVEL RESTRICTION… more
Abstract:COUPLING HIGH-PERFORMANCE METAL-MATRIX COMPOSITE STRUCTURAL ELEMENTS WITH END FITTINGS OF COMPARABLE HIGH PERFORMANCE PROMISES THE CAPABILITY OF FABRICATING STRUCTURES OF EXCEPTIONAL STRENGTH, RIGIDITY AND THERMAL STABILITY. ATTACHING THE END FITTINGS TO THE STRUCTURAL ELEMENTS DURINGTHE INITIAL… more
Abstract:FEASIBILITY WILL BE DEMONSTRATED FOR USE OF HIGH STIFFNESS HIGH THERMAL CONDUCTIVITY PITCH GRAPHIC REINFORCED-METAL COMPOSITES IN SIMPLE HEAT-PIPE CONCEPTS. THE VERY HIGHLY ANISOTROPIC THERMAL CONDUCTIVITY OF PITCH GRAPHITE, COMBINEDWITH EXCELLENT GR-METAL SPECIFIC MECHANICAL PROPERTIES SUGGESTS A… more
Abstract:BY ATTACHING (VIA WELDING OR BONDING) ARTICULATED TERMINATORS ONTO HIGH-PERFORMANCE GRAPHITE-ALUMINUM TUBULAR STRUCTURAL ELEMENTS, HINGED ANDD RIGID JINTS CAN BE STABLE DWA1 20 METAL-MATRIX COMPOSITES WILL FIND MANY APPLICATIONS IN THE FABRICATION OF STRUCTURES REQUIRING EXTREME STIFFNESS AND… more
Abstract:GRAPHITE FIBER IS ONE OF THE MOST VERSATILE REINFORCEMENTS KNOWN. WITH PAN BASED PRECURSOR, TENSILE STRENGTHS UP TO 1.2 MSI WILL BE AVAILABLE IN FY1986 AND WITH PITCH BASED PRECURSOR, MODULUS OF ELASTICITY UP TO 140 MSI WILL BE AVAILABLE. THE OBJECTIVE OF THIS PROGRAM IS TO EVALUATE THE LIMITS OF… more
Abstract:THIS PHASE I PROGRAM WILL DEMONSTRATE THE ABILITY OF UTILIZING HYBRID METAL-MATRIX COMPOSITES (MMC) ON SELECTED NAVY MISSILE STRUCTURES WHERE TWO STRUCTURES, OR SUBELEMENTS OF MARKEDLY DIFFERENT C.T.E. MUST BE ATTACHED. THE UNIQUE ABILITY OF TAILORING VARIOUS MMC'S TO ACHIEVE LOW, INTERMEDIATE, OR… more
Abstract:THE USE OF GRAPHITE/METAL COMPOSITES FOR SPACE STRUCTURE APPLICATIONS REQUIRING ZERO THERMAL EXPANSION CHARACTERISTICS HAS BEEN HAMPERED BY THE PROBLEM OF HYSTERESIS CAUSED BY MATRIX YIELDING. THIS HYSTERESIS HAS BEEN ELIMINATED IN LABORATORY SAMPLES BY HEAT TREATING THE COMPOSITE TO OBTAIN A MATRIX… more
Abstract:THIS PHASE I PROGRAM WILL CHARACTERIZE AND DEMONSTRATE THE EFFECTS ON STATIC MECHANICAL PROPERTIES AND COMPOSITE TOUGHNESS OF FINE GRAIN SIZE MICROSTRUCTURE OF GRANULAR STRUCTURE COMPOSITES WITH ISOTROPIC CHARACTERISTICS. PRESENT CERMETS AND DISCONTINUOUSLY REINFORCED METAL-MATRIX COMPOSITE… more
Abstract:THE USE OF GRAPHITE/MAGNESIUM COMPOSITES FOR SPACE STRUCTURES WITH ZERO THERMAL EXPANSION CHARACTERISTICS HAS BEEN HAMPERED BY THE HYSTERESIS CAUSED BY MATRIX YIELDING. THIS HYSTERESIS HAS BEEN ELIMINATED IN LABORATORY SAMPLES BY HEAT TREATING THE COMPOSITE TO OBTAIN A MATRIX YIELD STRENGTH IN… more
Abstract:IN PHASE I, A STUDY TO THIS PROPOSAL DESCRIBES A STUDY TO ESTABLISH TECHNICAL MERIT AND FEASIBILITY OF EXPANDING THE CURRENT SOLID MODELING VISUALIZATION ALGORITHMS, USED IN VIEWING OBJECTS ILLUMINATED BY LIGHT, TO VIEWING OBJECTS REPRESENTED BY THEIR UHF FREQUENCY RADIATION AND SCATTERING. THIS… more
Abstract:A HIGH SENSITIVITY MULTI-FUNTION MAGNETIC SENSOR SYSTEM BASED ON THE PROVEN CONCEPT OF A FIBER-OPTIC INTERFEROMETRICMAGNETIC TRANSDUCER IS PROPOSED FOR THE MEASUREMENT OF PLANETARY MAGNETIC FIELDS AND OTHER SPACECRAFT APPLICATIONS.FIBER-OPTIC MAGNETIC FIELD TRANSDUCERS HAVE BEEN SHOWN TO HAVE HIGH… more
Abstract:DYNAMICS TECHNOLOGY (DIT) PROPOSES TO APPLY A DEMONSTRATED VIDEOBASED MOTION ANALYSIS SYSTEM TO THE PROBLEM OF TRACKING SMALL PARTICLES (@UM) IN A HIGH SPEED LAMINAR BOUNDARY LAYER IN WATER. THE PRINCIPAL ISSUES IN THIS REGARD ARE (1) TO ACHIEVE ADEQUATE ILLUMINATION AND RESOLUTION TO ACCURATELY… more
Abstract:THE OBJECTIVE OF THE PROPOSED RESEARCH IS TO DEVELOP CONCEPTS AND PROCEDURES WHICH CAN COMPENSATE FOR GRAVITY EFFECTS (WITHOUT USING ARTIFICIALLY-INDUCED GRAVITY) IN SMALL SCALE ONE-G MODEL TESTS SIMULATING THE EFFECTS OF CLOSE-IN AND SHALLOWLY BURIED DETONATION OF NONNUCLEAR WEAPONS ON PROTECTIVE… more
Abstract:"RECENT TECHNOLOGICAL ADVANCES HAVE ASSURED THE POSSIBILITY OF RADICALLY EXPANDING THE MANEUVERING ENVELOP OF FUTURE FIGHTER DESIGNS. INCREASES IN FORCE AND MOMENT GENERATION AS WELL AS ENHANCED DEPARTURE RESISTANCE WILL ENABLE THE NEXT GENERATION OF FIGHTERS TO PERFORM MANEUVERS BEYOND TODAY'S… more
Abstract:MODERN FIGHTER AIRCRAFT ARE OPERATING IN A FLIGHT REGIME WITH INCREASING DEMANDS FOR MANEUVERABILITY AND CONTROLLABILITY TO BE EFFECTIVE IN THE COMBAT ARENA. ONE OF THE LIMITATIONS TO THAT EFFECTIVENESS IS THE INABILITY TO ACCURATELY TRACK TARGETS FOR GUN OR MISSILE SHOTS DUE TO THE DEGRADING… more
Abstract:INCIDENTS OF G-INDUCED LOSS OF CONSCIOUSNESS (G-LOC) OCCUR WITH ALARMING FREQUENCY IN TODAY'S HIGH PERFORMANCE TACTICAL AIRCRAFT AND POSE A SIGNIFICANT HAZARD TO FLIGHT SAFETY. IT IS CLEAR THAT THE NUMBER OF G-LOC RELATED MISHAPS NOW OCCURING IN THE PEACE-TIME TRAINING ENVIRONMENT IS ONLY A FRACTION… more
Abstract:A PASSIVELY-COOLED DETECTOR ARRAY TECHNOLOGY IN THE MID WAVELENGTH INFRARED (MWIR) REGION IS BEING SOUGHT FOR SPACEBORNE SURVEILLANCE APPLICATIONS. WE HAVE PROPOSED TO USE THE MOLECULAR BEAM EPITAXY (MBE) TECHNOLOGY TO FABRICATE HIGH-QUALITY INSB MATERIAL AND HIGHDETECTIVITY DETECTOR ARRAYS. THE… more
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