Award Data

A demonstration of Broadband Code Division Multiple Access (CDMA) for PCS communications overlaid in the 800 MHz AMPS cellular band will be conducted. Broadband CDMA using direct sequence spread spectrum has significant military advantages of jamming immunity and low probability of intercept. It is also the most promising of the new concepts for high capacity commercial cellular radio because of ...

The proposed work will explore possibilities for a less than 100 Watt-hour, pocket-sized, Trymer-"Type", thermoelectric generator that converts high energy-density fuels into electrical power for small system usage. Computer models and an actual small-scale working generator will be developed in Phase I and used to study and test the concept. Scavenged heat from an engine-exhaust manifold will a ...

This work offers an innovative approach to predicting system behavior (in terms of reliability and performance) based primarily on the structural characteristics of a formal functional specification. The mechanism for process composition is codified in the CSP-to-Stochastic Petri net (CSPN) toll. CSPN supports systematic specification, automatic translation and subsequent augmentation (e.g., fai ...

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ZC&H Dynamic Systems, Inc. proposes the development of an intelligent system for generating scenarios that will support strategic planning and policy analysis. The proposed system will be a tool-kit that will provide methods for modeling and reasoning about nonlinear effects in both warfare and corporate settings. Included will be tools for identifying centers of gravity, both of the user and th ...

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At present, the only fuel cell systems that have the capability of achieving high power den W cm-2) are the proton exchange membrane (PEM) and the alkaline fuel cell (AFC) systems. Of these, the PEM system is the leading candidate fuel cell power source for many military and commercial applications. In order to make PEM fuel cell power sources cost-competitive with competing technologies and more ...

At present, four classes of structural adhesives (epoxy resins, phenolic resins, acrylic adhesives and urethanes) are commonly employed in applications where the adhesive joint is either totally immersed in salt or fresh water or subject to high levels of moisture while simultaneously experiencing large shear loads. Each of these synthetic polymer formulations suffers from individual disadvantages ...

The Department of Defense has undertaken an ambitious environmental restoration program at thousands of facilities in the U.S. Many of these facilities have been contaminated by the discharge of dissolved heavy metals. Often these contaminants migrate into the ground water where they pose a serious threat to aquatic systems and to human health. The remediation of soils and ground water is usual ...