Award Data

Zeotrope refrigerant mixtures have been proposed and used for energy saving. Matching the temperature glide of the refrigerant to the temperature change of the heat sink and source, while simultaneously reducing the pressure difference seen by the compressor will result in significantly improved efficiency. A new cycle based on a mixture cascade combined with a rectifier column has recently been i ...

A fire fighter's ability to effectively combat fire is strongly dependant on the degree to which his clothing limits exposure to heat and flame. Available heat- and flame-retardant garments significantly increase exposure, but use environmentally hazardous additives; additionally, further enhancements in flame-retardation are deisred. Recent research at Oak Ridge National Laboratory and elsewher ...

The proposed program will investigate fabrication of low-cost and stable Si- based filterless solar-blind UV detectors on radiation-hard silicon-on-insulator (SOI) structures. By fabricating detectors on silicon thin films, the active device layer thickness can be chosen so that shortwave photons are detected within the active layer, while the longer wavelengths are absorbed in a substrate which i ...

This proposal describes a new research program to be established at the small business Still Sciences, LLC, in collaboration with Department of Physics of Oklahoma State University. The overall goal is to develop and commercialize an all-optical dosimetry system for industrial radiation processing based on a novel Pulsed Optically Stimulated Luminescence readout technique and a new Al2O3 material ...

The research proposed herein in intended to solve two problems, namely (1) to define a specification framework for access control policies that enables policy composition for both centralized and distributed systems in a precise and systematic manner, and (2) to explore the impact of different security architectures on policy composition. Although most commercial systems support applications that ...

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A diode laser method for the real-time measurement of absolute flux concentrations and spatial profiles of atomic beams used in MBE will be tested. The proposed method uses the doubled output of a near-infrared diode laser to access atomic absorption lines of species such as Ga, Al and In. The detection method will combine high frequency wavelength modulation and noise canceler approaches in order ...

Commercial aviation offers a low cost platform from which to make extensive humidity measurements, provided the instrumentation can run autonomously and endure the rigorous flight schedules. Advances in state of the art diode laser gas sensing technology make possible compact, fully automated, self-calibrating instrumentation with the sensitivity needed to measure humidity levels throughout the tr ...

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Smart IR technology has advanced at a rapid pace over the last two decades, pushed along by primarily defense-related requirements. This includes such breakthroughs as Acousto-Optic Tunable Filters and microbolometer detector arrays. Coupled with the continuing growth in microprocessor power, this promises to make a new generation of fast, cheap and reliable infrared (IR) fire detectors possible ...