Award Data

MMIC YIELD IS THE SIGNIFICANT FACTOR IN DETERMINING BOTH CHIP COST AND LEVEL OF INTEGRATION. IN ORDER TO MAXIMIZE YIELD, IT IS NECESSARY TO ESTABLISH A CONSISTENT, REPRODUCIBLE PROCESS CONTROL, COUPLED WITH CREATIVE CIRCUIT DESIGN TECHNIQUES USED TO CREATE SHIP SETS WHICH ARE TOLERANT TO PROCESS VARIATIONS. A LARGE PROPORTION OF THE FINAL COST FOR THE END PRODUCT IS RELATED TO THE ASSEMBLY AND FIN ...

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 ...

THIS EFFORT WILL FOCUS ON LOWERING COST AND IMPROVING PER- FORMANCE BY ELIMINATING CERAMIC AND PLASTIC PACKAGES PRES- USED IN SURFACE MOUNTING SEMICONDUCTOR CHIPS. THE CHIP WILL BE MOUNTED DIRECTLY TO A PREPARED FOOTPRINT ON THE PRINTED CIRCUIT BOARD (PCB) UTILIZING ADVANCED TAPE AUTO- MATED BONDING (TAB) AND NEW CHIP OVERCOATING MATERIALS. A COMMERCIALLY AVAILBLE VLSI SHIP WITH MORE THAN 60 I/O'S ...

CURRENT ALUMINUM MATRIX COMPOSITES WHICH USE ALLOYS REQUIRING SOLUTION HEAT TREATING, QUNEHCING, AND ELEVATED TEMPERATURE AGING SUFFER FROM POOR TOUGHNESS. IT IS EXPECTED THE TOUGHNESS OF ALUMINUM MATRIX COMPOSITES CAN BE SIGNIFICANTLY INCREASED THROUGH THE USE OF 5000 SERIES ALLOYS WHICH HAVE HIGH WORK HARDENING RATES AND GOOD DUCTILITY. ANY LOSS IN COMPOSITE STRENGTH CAN BE COMPENSATED BY ADJUST ...

COORDINATION OF THE SHARING OF SOURCE CODE IN MEDIUMETO LARGE-SCALE SOFTWARE DEVELOPMENT PROJECTS POSES A DIFFICULT PROBLEM IN THE ABSENCE OF A SOURCE CODE LIBRARIAN SYSTEM. UNFORTUNATELY, SYSTEMS OF THIS TYPE, WHILE POWERFUL AND FLEXIBLE, GENERALLY REQUIRE A LEVEL OF EXPERTISE AND COMMITMENT NOT COMMONLY FOUND IN THE APPLICATIONS CODE DEVELOPER. IN AN ATTEMPT TO ADDRESS THIS PROBLEM, THIS PROPOSA ...

ALL SURVIVABILITY/VULNERABILITY COMPUTER CODES, INCLUDING THOSE FOR PROJECTILES, LASERS, AND RADIATION EFFECTS, INVOLVE TRACING SAMPLE PATHS (CALLED SHOTLINES) THROUGH COMPUTERIZED GEOMETRY MODELS. FOR COMPLEX EQUIPMENT, HUNDREDS OF THOUSANDS OF SHOTLINES ARE ANALYZED TO DETERMINE ITS VULNERABILITY TO VARIOUS WEAPON EFFECTS. THUS, THE SHOTLINE-TRACING COMPUTER CODES STRONGLY INFLUENCE THE ACCURACY ...

AN INNOVATIVE APPROACH TO DEVELOPING A RETURN FLUX EXPERIMENT OF VEHICLE EMITTED GASES, VIA COLLISIONS WITH THEAMBIENT ATMOSPHERE, IS PRESENTED. THE SENSORS AND SOURCES REQUIREMENTS ARE DEVELOPED IN CONJUNCTION WITH NECESSARY MODELING PARAMETERS ASSESSMENT. THE EXPERIMENT PACKAGE IS DESIGNED FOR DEPLOYMENT IN THE SHUTTLE PAYLOAD BAY. THE SENSORS TO BE EVALUATED INCLUDE A PRESSURE GAUGE WITH DIRECT ...

EXISTING CONTAMINATION ASSESSMENT MODELS FOR SPACECRAFT UTILIZE A SINGLE COLLISION SCATTERING MODEL TO PREDICT FLUXES OF CONTAMINANTS ON SURFACES AND CONTRIBUTIONS TO OPTICAL LINES-OF-SIGHT. THEY ALSO DO NOT INCLUDE THE RAM PRESSURE BUILDUP OF AMBIENT GASES NEAR SPACECRAFT SURFACES. AN INNOVATIVE APPROACH IS PRESENTED THAT UPDATES THE GAS DYNAMICS MODELING OF CONTAMINANTS AND AMBIENT ATMOSPHERE IN ...

THE DEVELOPMENT OF COMPACT, HIGH ENERGY DENSITY, HIGH POWER (AND POTENTIALLY C.W.) LASER SYSTEMS CAPABLE OF PROPAGATING THROUGH BOTH AIR AND WATER COULD PAVE THE WAY FOR NEXT GENERATION TACTICAL NAVAL SYSTEMS. APPLICATIONS IN OTHER DEFENSE AREAS AS WELL AS A HOST OF COMMERCIAL APPLICATIONS ARE ALSO POSSIBLE WITH THESE TYPES OF SYSTEMS. WE PROPOSE TO PROVIDE A DETAILED PLAN AND DESIGN OF SPECIFIC E ...

DIRECT COMPUTATION OF TURBULENCE NOISE IS A LOGICAL APPLICATION FOR ADVANCED COMPUTATIONAL FLUID DYNAMICS, CFD, PROGRAMS RUN ON SUPERCOMPUTERS. THIS WOULD ELIMINATE THE HIGHLY EMPIRICAL ASPECTS OF PRESENT NOISE PREDICTION TECHNIQUES AND ENABLE STUDY OF ADVANCED HYPERSONIC PROPULSION SYSTEMS. HOWEVER, MANY OF THE SAME PERSISTENT PROBLEMS OF IMPLEMENTATION THAT EXIST IN AEROACOUSTIC THEORY AND MEASU ...