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Not Available This proposal addresses the problem of placement or rearrangement of antennas and ground stations in a satellite support network that will provide good network performance at low cost. The problem is motivated by the economic concerns associated with consolidation of satellite support network resources. The solution to this problem is extremely complex and requires juggling many dif ...

Not Available We propose to develop a novel, low-cost, amorphous silicon (a-Si:H) based modular to be integrated with a spacecraft thermal blanket for an auxiliary spacecraft power system. This new design is unique from ECD's present multi-junction module design in that an ultralight kapton substrate material and a monolithic cell interconnect design will be used which will allow for potential en ...

As the number of mobile source emissions in the United States increases, it is necessary to further reduce the emission of CO, NOx, and hydrocarbons from such sources to provide safe air quality, especially in urban environments. Significant reductions in pollution emissions can be achieved using advanced engine controls based on real-time measurements of CO, NOx, and hydrocarbon concentrations i ...

Not Available The need for technologies to reduce the cost and time of getting civil and commercial space missions from the drawing board to orbit is driving research efforts towards lighter, cheaper and smaller satellites. As a result of this demand, technologies such as microfabrication technology, which originally emerged as the electronics industry demanded smaller features in integrated circ ...

A number of very high-volume liquid chemicals form azeotropes with water and can be dehydrated to required purity levels only through the use of entrainers or drying agents. The handling and disposal of these additional chemicals present significant environmental risks. Recently, membrane pervaporation using both polymeric and inorganic membrane modules has been commercialized as a method to deh ...

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One of the program areas of interest to the U.S. Environmental Protection Agency (EPA) is the development of rapid, non-invasive monitors to detect exposure to toxic air pollutants at trace (ppt) levels. Of the 356 chemicals listed on the Chemical Emergency Preparedness and Prevention Office¿s List of Extremely Hazardous Substances (Section 302 of the Emergency Planning and Community Right-To-Kn ...

Not Available Scheduling of the Air Force Satellite Control Network (AFSCN) is key to its effective utilization. As demands increase and resources decrease, scheduling must become more efficient. Current AFSCN scheduling is manpower intensive and complicated. Since this process is mainly a manual one, it can take a new scheduler months to become fully trained. Computer automation and optimization ...

Combined sewage outflows (CSOs) are a major contributor to water pollution in the United States. The impact of peak stormwater loads on sewage treatment plants leads to the discharge of significant amounts (1.26 billion gallons) of untreated sewage each year. The bacterial load represented by this discharge directly contributed to more than 2,200 beach closings in the year 2000, numerous closing ...