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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 ...

Water is one of the basic commodities which will be needed in ever increasing quantities as industrialization and urbanization of the world progresses presenting many new challenges for the water processing industry. As new industrial products have been developed and manufactured with increasing complexity and sophistication so has the need for increasing the purity of the processing water that is ...

Carbon-Carbon components, initially developed for the aerospace industry, have experienced minimal commercialization over the past decade due to cost constraints. C-C composites are excellent candidates for a wide variety of components such as automotive clutches, brakes, and liners, due to its friction and heat transfer characteristics. Recently, within the past five (5) years, new C-C processing ...

BioMedical Enterprises, Inc. (BME) and NASA Ames Research Center (NASA ARC) are developing NASA's aerospace insulation materials for use as an osseous scaffolding to facilitate and support bone wound healing and regeneration. Fibrous reusable composite insulation (FRCI) developed by NASA for use on the space shuttle was modified to promote bone ingrowth and will be evaluated for its ability to fo ...

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