Award Data

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The single most important type of metal/SiC junction is the n-type, rectifying Schottky diode, because it is the voltage blocking junction in all majority carrier devices. A reliable junction of this type for n-type SiC is the key to its development for high temperature, power conditioning electronics. Phase I will demonstrate that osmium is the ideal metal for forming such junctions. Phase II wil ...

CURRENT STUDIES CONCENTRATE ON GLOBAL POSITIONING SYSTEM (GPS) AS A SPACECRAFT ATTITUDE DETERMINATION TOOL. TWO GPS ANTENNAS RECEIVING THE SAME SIGNAL CAN COMPARE THEIR RELATIVE PHASES TO DETERMINE THE ANGLE BETWEEN THE TWO ANTENNAS AND THE GPS SATELLITE. BY COMPUTING THE ANGLE TO THREE OR MORE SATELLITES, THE COMPLETE INERTIAL ORIENTATION MAY BE DETERMINED. APPLYING ADVANCES IN GPS INTERFEROMETRY ...

MATERIALS FOR SPACECRAFT STRUCTURES ARE REQUIRED WHICH POSSESS HIGH STIFFNESS TO WEIGHT RATIOS, ALONG WITH CHEMICAL AND DIMENSIONAL STABILITY IN SPACE ENVIRONMENTS. B(4)C HAS ONE OF THE HIGHEST RATIOS AND CAN BE FABRICATED INTO DENSE BODIES. OPTIMAL COMPOMENT PERFORMANCE WILL LIKELY REQUIRED AN IMPROVED B(4)C POWDER WHICH IS NOT AVAILABLE COMMERCIALLY NOW. A PROPRIETARY HIGH TEMPERATURE REACTOR HA ...

LACK OF RELIABLE, FLEXIBLE, LOW COST TRANSPORTATION FOR SMALL PAYLOADS IS A BOTTLENECK IN THE DEVELOPMENT AND DEPLOYMENT OF SPACE BASED SYSTEMS. PACASTRO'S FAMILY OF ROCKET VEHICLES, EMPLOYING A CORE PRESSURE-FED, LIQUID PROPULSION UNIT AND ELECTRONICS AND SOFTWARE TECHNOLOGY DEVELOPED IN SMALL LOW COST SPACECRAFT PROGRAMS, WILL CUT IN HALF THE PRICE OF LAUNCHING SMALL SUBORBITAL AND ORBITAL PAYLO ...

The trend toward replacement of highly toxic chemicals with less hazardous alternatives has created the demand for replacement of chromate conversion coatings for corrosion protection of aluminum alloys. Aluminum alloys are the predominate structural material used in aircraft because of their high strength-to-weight ratios, affordability and processability. Aluminum is subject to catastrophic fail ...

This proposal presents a program for developing a novel patterning system technology that not only delivers submicron resolution over a large image field, but also produces high exposure throughput and eliminates the shortcomings of conventional systems. The new technology is highly attractive in the fabrication of semiconductor integrated circuits and flat-panel displays. Phase I will design a sy ...

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The proposed effort will apply advanced methods of hybrid learning to problems of detection and identification of sensory events (e.g., boost phase evens). Our approach aims at building a vision system capable of hybrid learning, in which symbolic (rule-based) and subsymbolic (neural network) strategies are integrated to achieve high efficiency and accuracy both in learning human comprehensible se ...

Our proposed innovation advocates the use of well-known variable conductance heat pipe (VCHP) technology for cryogenic applications where temperature control of sensitive components is also required. IR sensors operating at cryogenic temperatures frequently require temperature control to plus or minus 1.0 degrees C while some applications demand finer control down to pluse or minus 0.1 degrees C. ...