Award Data

We propose to demonstrate the feasibility of fabricating a phototransistor using the A1xGa1-xN material system. The proposed phototransitor is based on a GaN-A1xGa1-xN heterojunction which exhibits a 2-D electron gas conduction when a bias is applied on the source-drain terminals. The device is maintained in a nominally OFF state by applying a reverse bias voltage on the gate terminal. With optica ...

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NAVIGATION OF FIELD MOBILE ROBOTIC SYSTEMS REQUIRES A MEANS FOR THE ROBOTIC SYSTEM TO DETERMINE ITS ABSOLUTE LOCATION. THE USUSAL MEANS IS TO USE A VEHICLE INTERTIAL GUIDANCE SYSTEM WHICH IS PERIODICALLY UPDATED BY A GPS OR LORAN C RECEIVER. UNFORTUNATELY, GPS AND LORAN CAN ONLY PROVIDE ABSOLUTE POSITIONAL ACCURACY TO WITHIN 5 METERS OR SO WHICH LIMITS THE COMBINED INS/GPS/LORAN SYSTEM TO ABOUT TH ...

MOBILE ROBOT SYSTEM NAVIGATION IS A DIFFICULT PROBLEM UNDER ANY CIRCUMSTANCES. OUTSIDE NAVIGATION USING COMPUTER VISION-BASED METHODS REQUIRES RECOGNITION OF VARIABLE TERRAIN FEATURES OR THE USE OF A RADIO LOCATION SYSTEM SUCH AS A GLOBAL POSITIONING SYSTEM. INDOOR NAVIGATION IS TYPICALLY ACCOMPLISHED WITH A COMBINATION OF PROXIMITY SENSORS (USUALLY SONIC) AND ARTIFICIAL GUIDANCE TARGETS IMPLEMENT ...

The proposed effort analyzes five spectral imaging radiometer concepts with the goal of developing an infrared spectral imaging radiometer (IRSIR) for use in high performance aircraft. The desired performance characteristics for this IRSIR are: high optical throughput, a small physical package, and 0.5 to 1.0 percent spectral resolution over the 0.2 to 12 um range at frame rates of 30-100 frames p ...

The developement of four different doping sources for use within an MBE system is proposed. Two high purity, high uniformity sources for use with Carbon, and two such sources will be developed for use with Tellurium. The purity of the species produced by each cell will be studied with a Residual Gas Analyzer. Recommendations concerning the use of these cells in a solid source MBE system will be su ...

High temperature storage heaters are needed to provide clean, hot air for aerodynamic and propulsion testing of hypersonic vehicles. Vitiation heaters do not properly simulate the vehicle flight conditions, thus limiting the ability to develop tomorrow's aircraft in a timely manner. Yttria-zirconia storage heater development work was sponsored by the Air Force in the 1960's, but did not produce an ...

The development of a low-cost reliable and long-life novel, electrochemical sensor with multigas sensing capability that can detect 10 ppb of toxic gases and vapors with a response time of 30 seconds is proposed. During phase I, we will develop an electrochemical amperometric sensor cell with a three electrode configuration using nonaqueous aprotic electrolyte solution. This nonaqueous electrolyte ...

To provide the Air Force with the capability of measuring optical wave-front properties around aerodynamic structures in wind tunnels, Innovation Associates proposes to develop a High-Speed, Aero-Optical Wave-frong Characterization System (AWCS) which is capable of recording 64,000 or higher wave-front phase measurements per second. AWCS will consist of three subsystems: (a) an innovative high spe ...

IN THE LONGER TERM, THE RESULTS OF THIS RESEARCH COULD LEAD TO IMPROVE D METHODS AND EQUIPMENT FOR SAMPLING, CONCENTRATING AND ANALYZING TRACES OF HAZARDOUS CHEMICALS IN GROUNDWATER. SPECIFIC OBJECTIVES: 1) PREPARE HOLLOW FIBER MEMBRANES BY SURFACE MODIFICATION. 2) ASSEMBLE MEMBRANE MODULES. 3) TEST MODULES FOR PERMEABILITY TO SELECTED PESTICIDES IN WATER SOLUTION. 4) SELECT APPROPRIATE SOLVENTS F ...