Award Data

Use of chromates as corrosion inhibi.tors in coatings, adhesives and sealants is a well established technology. However, toxicity and waste disposal problems have led to the urgent need for development of an environmentally benign substitute for chromium compounds in coatings and sealants, which is the subject of this SBIR. This pa'per discusses the state-of-the-art technical approaches to the sol ...

We propose the exploration of single crystal GaN waveguides for the fabrication of optoelectronic integrated circuits. The feasibility of using GaN for short wavelength (up to 365 nm) OEIC's will be established in Phase I via the demonstration of a channel waveguide based phase shifter. The Al(sub x)GA(sub 1-x)N material system with its transparency from 365 nm to 12 microns, tunable refractive in ...

Epitaxial growth of the aluminum gallium nitride (AlGaN) material system by molecular beam epitaxy (MBE) has been hindered by the lack of a suitable nitrogen source. The deposition of AlGaN at typical MBE growth temperatures results in nitrogen deficient films that suffer from low growth rates and high n-type background carrier concentrations. This problem has recently been addressed in MBE by inc ...

Silicon carbide (SiC) is the ideal semiconductor for fabrication of solid state devices for power conditioning for the all-electric airplane, turbine engine actuators, and space-based power systems. These applications require switches and amplifiers capable of large currents with relatively low voltage drops. The potential for improved performance is indicated by SiC's material characteristics. Fo ...

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The compound 2,3,7,8-tetrachlorodibenzodioxin (2,3,7,8-TCDD) has been called the most toxic compound known to man. 2,3,7,8-TCDD is globally distributed but is found in high concentration at many hazardous waste sites associated with the production and use of chlorinated pesticides/herbicides. Traditionally, contaminated soils have been excavated and transported off site to a hazardous waste incine ...

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Treatment and disposal of surfactant-laden waste waters is a significant problem at firefighter training facilities, as well as in real world use. The extremely high foaming potential and chemical oxygen demand of these waters restricts their discharge into sewage treatment plants. Improved treatment processes must be developed for aqueous firefighting foams, hydrocarbons, and their degradation by ...

PDRI proposes to develop two criterion measures to assess retention and decay of Aerospace Physiology (AP) knowledge and skills. The standard criterion measure for measuring knowledge/skill retention and decay is a Job Knowledge Test (JKT). Therefore we will develop a multiple-choice JKT using expert aassistance from AP training staff. The JKT will measure the foundation of AP knowledge and skills ...

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