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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 ...

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 ...

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 ...

The proposed project will evaluate a variety of power electronic topologies of the interface between a micro SMES system and the dc side of commercially available ac inverters, in-line UPS systems, and variable speed drives. This assessment will be applicable to micro SMES systems with an energy storage of up to 10 MJ and power rating of up to about 5 MW. The range of 500 to 5,000 Vdc will be us ...

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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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Xinotech has researched and developed a metalanguage-based, multi-lingual, interactive programming and transformation environment, commercially available for Ada, CMS-2, Modula-2 and COBOL, for CMS-2 to Ada translation, and for Ada restructuring and modernization. The language-independent architecture is supported by XML, the Xinotech Meta-Language, and XPAL, the Xinotech Pattern Abstraction Meta ...