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Modern GPS receivers adopt a digital architecture to facilitate signal processingusing high speed VHDL electronics. NAVSYS has developed a buffered digital receiver architecture (the TIDGET (TM) -PLUS) that optimizes the GPS search and acquisition process by operating in the frequency domain. The Rapid Acquisition FFT (RAFFT) approach was developed by NAVSYS initially to speed high dynamic C/A c ...

PhotoSense proposes to develop instrumentation and test methods for jet fuels. There is a need for new and improved instrumentation and methods suited for both laboratory tests to aid in fuels development and for the field to assure quality of fuels before consumption. One of the primary objectives of the Phase I development program will be to develop methods for the determination of water in jet ...

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It is known that atmospheric observations by microwave radiometers can predict and measure satellite link losses. These instruments, however, have historically been costly, bulky, and somewhat fragile, and therefore not desirable for monitoring satellite link conditions. Radiometries is proposing herein to modify an inexpensive monolithic microwave integrated circuit (MMIC) receiver currently manu ...

To meet the demanding aerospace engine conditions (extended time near 1500¿ C), materials are needed that posses high strength, toughness, chemical stability in oxidizing environments, and stable thermomechanical properties at high temperatures. Ceramic oxides are the most promising materials for these demanding conditions. Unfortunately, monolithic ceramics are too brittle and ceramic matrix ...

Because they seek out and bind only to specific cells, monoclonal antibodies represent a powerful method for selectively carrying radionuclides to cancerous cells. Current techniques for attaching radionuclides to monoclonal antibodies rely on metal ion chelates. These often lack sufficient stability, and the radionuclide may be released by in vivo chemical processes or by the compounds that enca ...

Amino acid are the main components of proteins and are important elementary nutrients for living organisms. They are also valuable synthetic intermediates for the preparation of a large array of biologically active compounds important to the pharmaceutical industry. Examples of drugs based on amino acids are L-DOPA, L-tryptophan, and beta-lactam antibiotics. Unfortunately, typical production met ...

Diabetic foot ulcers account for 55,000 amputations per year and are the leading cause of diabetic patient hospitalizations. Treatment requires off-weighting of the foot through bed rest, wheelchair, crutches, healing sandals, modified shoes, and/or bandaging treatments. Treatment compliance, however, is difficult to maintain since diabetics with peripheral neuropathy do not feel pain in the affec ...

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