Award Data

A POWERFUL, NOW IMAGING MODALITY IDEALLY SUITED FOR THIN-SHELLED STRUCTURES BUT CONSIDERABLY MORE GENERAL IN NATURE IS PROPOSED. THE APPROACH IS BASED ON WELL- ESTABLISHED DIGITAL TOMOSYNTHESIS PRINCIPLES AND MODERN REAL-TIME DIGITAL RADIOGRAPHY TECHNIQUES. A SERIES OF COMPONENT RADIOGRAPHS OF A STRUCTURE TAKEN FROM DIFFERENCE ANGLES ARE MANIPULATED ACCORDING TO A RESTORATIVE ALGORITHM TO RECOVER ...

THE ADA LANGUAGE HAS BEEN DESIGNED FOR THE DOD AS A PRIMARY LANGUAGE FOR EMBEDDED SYSTEMS. MANY FEATURES OF ADA TEND TO MAKE EXECUTION OPERATING SYSTEM (OS)-INTENSIVE. THESE ARE I/O, MULTITASKING, EXCEPTION HANDLING, TIMESLICING, AND DYNAMIC STORAGE MANAGEMENT. IN MANY SYSTEMS THESE FUNCTIONS ARE HANDLED BY THE OS COOPERATING WITH THE LANGUAGE RUNTIME SYSTEM (LRS). CALLS TO THE OS GENERALLY FORCE ...

THREAT SIMULATORS CAN MAKE BENEFICIAL USE OF SURFACE-ACOUSTIC-WAVE (SAW) DISPERSIVE DELAY LINE (DDL) DEVICE TO SIMULATE ENEMY RADAR CHARACTERISTICS. HOWEVER, A MORE IMPORTANT APPLICATION FOR SAW DDL DEVICE IS IN "SCORING RECEIVER". THE RECEIVER WOULD SERVE TO ANALYZE AND EVALUATE THE ECM GENERATED IN RESPONSE TO THE THREAT. THIS NOT ONLY PERMITS EVALUATION OF ECM EFFECTIVENESS, BUT ALSO BE USED TO ...

CONTINUAL MONITORING OF STRUCTURAL INTEGRITY AND DETECTION OF DAMAGE AND ITS SUBSEQUENT COMPENSATION, REPAIR, AND CONTROL ARE IMPORTANT CONSIDERATIONS FOR LARGE, COMPLEX SPACE STRUCTURES. PHASE I IS TO RESEARCH A SYSTEM WHICH WILL REDUCE THIS TASK TO A MODULE-BY-MODULE SELF-INTEGRITY MONITORING SYSTEM. A COMPLEX SPACE STRUCTURE WILL BE DIVIDED INTO SEVERAL SECTIONS, OR MODULES. INTERFACE FORCES AN ...

THE AIR FORCE NEEDS RELIABLE AND ACCURATE GAS TEMPERATURE MEASURING CAPABILITY AT HIGH TEMPERATURES. A SPECIFIC APPLICATION IS IN MEASURING GAS TURBINE COMBUSTOR EXIT TEMPERATURES, WHERE CURRENT NEEDS EXCEED THE CAPABILITY OF EXISTING TEMPERATURE MEASUREMENT SYSTEMS. THIS PROGRAM WILL DETERMINE THE FEASIBILITY OF A THERMAL PROBE SYSTEM CAPABLE OF 15 DEG F ACCURACY AT 2000 TO 3000 F FOR THE GAS TUR ...

SMALL MOBILE MISSILE SYSTEM CONCEPT VIABILITY IS DEPENDENT ON DENIAL OF ACCURATE TARGETING INFORMATION TO THE AGRESSOR. RELOCATION TIMES MUST BE LESS THAN THE AGRESSOR'S SURVEILLANCE/TARGETING CYCLE TIME. THIS STUDY PROJECTS SOVIET SURVEILLANCE CAPABILITIES AND INFORMATION PROCESSING AND RETARGETING CAPABILITIES FOR THE 1995 TO 2000 TIME PERIOD. BASED ON THIS PROJECTION, THE SMALL MOBILE MISSILE S ...

THIS PHASE I PROGRAM IS INTENDED TO DEMONSTRATE THE FEASIBILITY OF PRODUCING A LIGHTWEIGHT METAL-MATRIX COMPOSITE (MMC) HEAT-REMOVAL BAR HAVING THE THERMAL CONDUCTIVITY OF COPPER AND TO SHOW, BY MECHANICAL AND PHYSICAL-PROPERTY TESTS, THAT THIS MMC IS A USEFUL MATERIAL FOR HEAT TRANSFER IN SPACE AND AVIONICS APPLICATIONS. THE PROGRAM WILL FOCUS ON NEWLY DEVELOPED "DWG" MATERIAL (CONTINUOUS GRAPHIT ...

THIS PHASE I PROGRAM IS DESIGNED TO DEMONSTRATE THE FEASIBILITY OF PRODUCING LIGHTWEIGHT, LOW CTE METAL-MATRIX COMPOSITE FITTINGS OF GRAPHITE-FIBER/ALUMINUM AND TO SHOW BY MECHANICAL AND PHYSICAL-PROPERTY TESTS THAT THE MATERIAL IS USEFUL FOR APPLICATION TO SPACE STRUCTURAL HARDWARE. THE PROGRAM WILL FOCUS ON RECENTLY DEVELOPED DWG (CONTINUOUS GRAPHITE-FIBER/ALUMINUM) AND DWAL-G (CHOPPED GRAPHITE- ...

ULTRAFINE PARTICLES OR POWDER CAN BE PREPARED BY EVAPORATING MATERIAL INTO AN INERT GAS ATMOSPHERE. THE VAPOR IS COOLED BY THE INERT GAS AND BECOMES SUPERSATURATED, LEADING TO PARTICLE CONDENSATION. HOWEVER, CONVECTION OF THE INERT GAS IS A SEVERE PROBLEM, CAUSING THE PARTICLES TO COALESCE INTO A FEWER NUMBER OF LARGER PARTICLES. ANALYSIS SUGGESTS THAT PARTICLE PRODUCTION BY THIS TECHNIQUE IN MICR ...

U.S. RESEARCH ON DYNAMIC SPACE POWER CONVERSION TECHNOLOGY SINCE THE 1960S HAS FOCUSED MAINLY ON NUCLEAR REACTORS, HEAT PIPES, AND HEAT ENGINES. LITTLE WORK HAS BEEN DONE ON STS-COMPATIBLE SOLAR CONCENTRATORS. THIS STUDY REFINES OUR DESIGN OF AN UMBRELLA-LIKE CONCENTRATOR WHICH SHOULD: (1) WEIGH SIGNIFICANTLY LESS THAN 400 KG, (2) STOW IN THE SPACE RESERVED FOR THE 2ND SHUTTLE RMS ARM, AND (3) DEL ...