Award Data

WE PROPOSE TO SEARCH FOR NEW SUPERCONDUCTORS THAT ARE SIMILAR TO THE PEROVSKITE-BASED HIGH TEMPERATURE SUPERCONDUCTORS (HTS), BUT WITH THE OXYGEN REPLACED BY A CHALCOGEN, THAT IS SULFUR, SELENIUM OR TELLURIUM. WE BELIEVE THAT THE HTS COPPER OXIDES ARE NOT A UNIQUE ACCIDENT OF NATURE, BUT THAT THERE ARE OTHER COMPLEX CHEMICAL COMPOUNDS THAT COULD ALSO BE SUPERCONDUCTING. AN OBVIOUS PLACE TO LOOK WO ...

InP based heterojunction bipolar transistors (HBTs) exhibit proven potential for use in high performance digital integrated circuits and discrete microwave components. For high speed applications, it is desirable to utilize structures that have been designed to promote high levels of nonequilibrium electron transport as this allows realization of higher electron velocities than possible for diffus ...

REGENERATORS THERMOFLUID CRYOREFRIGERATORS THE NEW TYPE OF REGENERATORS PROPOSED OFFERS FOR 10 K CRYOCOOLERS THE PROSPECT OF REDUCTIONS OF 100'S OF WATTS OF POWER AND KILOGRAMS OF WEIGHT PER WATT OF REFRIGERATION, AND EXTENSION OF OPERATING LIFE BY 10,000'S OF HOURS. PHASE 1 WILL DEFINE THE MODELING, THERMOFLUID PERFORMANCE TRADE-OFFS, MATERIAL PROPERTIES, PRODUCTION AND TEST METHODS. THESE REGENE ...

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Aerospace composite panels containing a core structure usually use an expanded honeycomb of either aluminum, NOMEX, or carbon fiber. These types of composite panels are often used as structure since the honey-comb core provides stiffness in the "Z" direction. However, they provide no thermal insulation value. Aerospace craft operating both inside and outside the earth's atmosphere experience envir ...

Currently manufactured aerospace composites absorb water vapor to varying degrees. This moisture absorption adds weight to the composite, however, it lowers the glass transition temperature. And, subsequently, the ultimate strength of the resin holding the composite together, in the total composite matrix. For aerospace vehicles that slip the bonds of Earth and enter the vacume of space, any compo ...

Solid-state electronic devices are often subjected to high voltage transients generated by switching, lightning, or electrostatic discharge. These transients can cause mission critical components to fail. Varistors are increasingly used to avoid such failures. The current varistor devices, however, are not well suited for high frequency applications and the increasing trend towards device miniatur ...

Inductors are essential components of military and commercial power management and electronic systems. Existing ferrite based inductors have reached a technology plateau that allow only marginal improvements in performance per unit volume. It is anticipated that the future inductor based technologies, such as EMI suppression, would require significantly higher energy density inductors. Fundamental ...

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