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AstroPower will develop a two-junction monolithic tandem solar cell composed of (AlxGa1-x)0.51 In(0.49)P, which is lattice matched to GaAs, as the top cell in a three-junction, two-terminal tandem solar cell. This new tunable bandgap Al-Ga-In-P material is capable of current matching in a two-junction monolithic tandem solar cell two-terminal design of the Al-Ga-In-P over GaAs yielding a best case ...

AstroPower is developing a highly sensitive UV detector based on epitaxial AlGaP/GaP heterostructures, a promising new material system for ultraviolet detectors. Detecting ultraviolet light is important to spectrophotometry, astronomy, high-energy physics, medicine, UV curing, photoresist exposure, and chemical processes. The large bandgap and crystalline quality of gallium phosphide will provide ...

CHEMICALLY REMOVED SPENT AIRCRAFT METALS AND THEIR SALTS WHOSE WASTES ARE OF GREAT CONCERN TO THE AIR FORCE CAN INCLUDE CHROMIUM, COBALT, NICKEL, ALUMINUM, TITANIUM AND MAGNESIUM. ENVIRONMENTAL LAWS CONCERNING THE DISPOSAL OF THESE WASTE MATERIALS ARE BECOMING INCREASINGLY STRICT AND NEW PROCESSES MUST BE DEVELOPED WHICH ARE EFFICIENT AND COST-EFFECTIVE WHILE COMPLYING WITH EPA REGULATIONS. AT PRE ...

IN THE PAST DECADE, WASTEPAPER RECYCLING HAS GAINED A WIDER ACCEPTANCE. DEPLETION OF TREE STOCKS, WASTE WATER TREATMENT DEMANDS AND ENVIRONMENTAL AWARENESS HAVE DRIVEN RECYCLING BOTH IN GOVERNMENT AND INDUSTRIAL SPHERES. USING GREATER QUANTITITES OF WASTEPAPER STOCK REDUCES THE NEED FOR VIRGIN FIBER AND MINIMIZES THE PROBLEM OF SOLID WASTE DISPOSAL. PRIOR TO RECYCLE, HOT WATER AND CHEMICALS SEPARA ...

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AN IN LINE HELMET OR HEADSET MOUNTED AUDIO-VIDEO INTERACTIVE DISPLAY DESIGN IS PRESENTED THAT HAS ALL OF THE IMAGING AND PROJETION DEVICES ON OR NEAR A FLIP UP FACEPLATE OR VISOR. NO SIDE OR TOP MOUNTED CRT AND PROJECTION LENS IS USED AND AMBIENT LIGHTING IS A REALISTIC POSSIBLE OPTION FOR DISPLAY ILLUMINATION. THE SEE THROUGH QUALITY OF THE DEVICE DEPENDS ON THE POLARIZATION SELECTION PROPERTY OF ...

TRA PROPOSES TO DEVELOP, CONSTRUCT, AND PRODUCE A SMALL (130 IN [3]) LIGHTWEIGHT (2-3 LBS) MULTIPURPOSE MEDICAL CENTRIFUGE FOR COMBAT CASUALTY CARE UNITS. THE CENTRIFUGE WILL BE POWERED BY EITHER 110-220 VAC, 50-60 HZ OR BATTERIES AND WILL BE DESIGNED AND TESTED TO OPERATE IN EXTREME TEMPERATURE, MECHANICAL SHOCK AND VIBRATION CONDITIONS. OPERATION WILL BE MICROPROCESSOR CONTROLLED TO MINIMIZE USE ...

We propose to design an eddy-current probe testing station, built aronnd a PC running Interactive Systems Carp. UNIX (ISC UNIX). The testing station will provide a quantitative evaluation of eddy-current probe perform aJice ? thereby improving the accuracy and reha,bility of eddy-current inspection. The station will consist of a model foi probe-flaw interactions, a data acqmsition system, and a. u ...