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Project objectives briefly described: i. Improve accuracy of measurement for cheating examinees by using a scoring method that takes account of the credibility of the examinee's patterm of wrong answers. ii. Provide an adjunct to on-line calibration that would assist in timing the replacement of items. iii. Identify test sites and recruiters that are associated with high rates of item compromis ...

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The adaptive single user receiver invented at AF LAB has been shown to suppress multiuser and certain forms of narrow-band interference in adecision directed mode during the entire transmission, without requiring knowledge of other users spreading codes, timing or phase information in direct-sequence proposal, we investigate the use of our single user receiver for secure communications as required ...

Our long term objective is to design and develop a prototype instrument for automated reticulocyteerythrocyte maturation determination, based on the latest technology in image cytometry, to increaseaccuracy, and reliability of bone marrow activity assessments. Evaluation of bone marrow activity habecome important in clinical and research medicine as shown by the marked increase in the number ofreq ...

We will develop a unified experimental approach to the accurate and simultaneous measurement of bonand resorption rates applicable to all animals, including man, using stable isotopes of strontium (Sformation and resorption rates is of fundamental importance to a better understanding of bone metabodisease. During Phase I, they will establish 1. that when rats undergo continuous feeding with the sm ...

We propose to design and develop a new x-ray detector system for use in underground mine imaging applications. The detector system will be designed to operate with a pencil-beam sca m ing x-ray source, and will detect the Compton interacted radiation that is scattered back toward the X-ray source. It will image horizontal views of thin layers of the underground structure. The detector we propose t ...

We offer a scanning linear x-ray tube with easy length extension, using a scanning laser to excite electron emission in lieu of a conventional cathode. The project will use the results from a current Phase I SBIR contract and from two major companies.

We offer a scanning linear x-ray tube with modular length extension, using sequentially activated multiple cathodes, each with a short linear scan range. The problem of assuring a smooth transition from one cathode to the next has been addressed, and the program will benefit from knowledge and equipment obtained in a previous contract on switched cathodes.

While the efficiency of x-ray sources is defined by the laws of physics, present day sources do not take full advantage of those laws. Other materials thant tungsten are not only more efficient in producing bremsstrahlung, but have "characteristic" x-rays that can make the beam harder instead of softer (as in the case for tungsten). Today's tubes also do not use optimum angles for the incident e ...

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