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A methodology is proposed for introducing the capability of modeling active MMICs into the industry-standard three dimensional electromagnetic field simulator High Frequency Structure Simulator (HFSS) and Maxwell SI Eminence. The first objective of the proposed work is to evaluate the existing capabilities of HFSS/Eminence for characterizing the passive three dimensional interconnect problems as ...

We propose a unique GaN-Al(sub x)Ga(sub 1-x)N heterojunction based CCD for imaging in the ultraviolet (wavelengths less than 365 nm). Our proposed device will be solid state, TTL compatible and in it's final configuration solar blind. The Phase I program is aimed at establishing the technical feasibility of our device concept. Our proposed CCD is in essence a GaN-AlGaN gated photoconductor with ...

A concept for intelligent, multimedia computer-based training systems integrating intelligent agents with eye tracking and speech (ScanEval) is presented as a means of developing training systems that are more responsive, engaging, and motivating to trainees than current systems relying on more traditional user interface and pedagogical sequencing mechanisms. It is argued, based on published rese ...

The traditional site characterization approaches, viz., soil borings and monitoring wells, are labor intensive and costly. Interest has grown rapidly over the past five years in the use of cone penetrometers and other minimally invasive methods to deploy or emplace sensors. The focus of this SBIR proposal is integration of chemical and physical sensors with hydraulically driven probes that can be ...

This effort will address five problems in the process design of heterojunction bipolar transistors (HBTs) and high electron mobility transistors (HEMTs): (1) HEMT thermal impedances will be measured using a novel method and will be compared with finite-element simulations to provide more accurate values for computer-aided design programs. (2) The role of the spacer layer in HEMT performance and ...

We propose to build upon prior experience to develop hardware customized to a selected spacecraft application. This hardware would employ an adaptive mechanical resonance as a vibration control element. Two related uses of such a device are described; the tuned vibration absorber and the tuned mass damper. Hood Technology Corporation has built and tested such devices for other applications. We ...

Final course grades in military technical schools are frequently used as the criterion in assessing the validity of a variety of cognitive, perceptual, and psychomotor ability tests. PDRI proposes an innovative approach to criterion development for use by AF researchers. During the proposed Phase I SBIR effort, we plan to begin development of two sets of criterion measures. The first set will b ...

Molecular Beam Epitaxy (MBE) is a key fabrication technology for high performance III-V and other semiconductor devices of importance to many DoD and commercial applications. A variable group III element source flux would provide agile vertical layer composition control required for sophisticated device fabrication. One recent source concept, Linear Motion Oven or LIMO, appears especially promisi ...

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An investigation of the efficacy of low temperature aqueous phase catalytic oxidation for the destruction of organic water pollutants of significance to the U.S. Armed Forces is proposed. It has been shown in our laboratory that organic contaminants can be mineralized in the aqueous phase using dioxygen over noble metal catalysts at temperatures between 120-160C. Work to date has been an outgrow ...