Award Data

The recent emergence of the Silicon Drift detector (SDD), for use in Energy Dispersive x-ray Spectroscopy (EDS), has made possible x-ray event streams with input count rates in the range of 1-10 Mcps. Modern digital pulse processors are therefore required to run at fast time constants to achieve reasonable throughput; however, this causes significant coincidence artifacts to appear in the spectrum ...

We propose an optical imaging system utilizing a pair of MEMS mirrors to achieve a wide field of regard and zooming characteristics. This system is anticipated to meet the challenging constraints put forth in this program: a total field of regard of up to 80 degrees, fast scanning speeds, and up to 5x optical zoom.

Chlorine gas was first used as a weapon during World War I and has reemerged as a threat in Iraq compounding the dangers from existing improvised explosive devices. One of the significant challenges with preventing attacks that involve toxic industrial chemicals (TICs) like chlorine, ammonia is that they have genuine civilian uses for water treatment, in refrigeration systems, and others, that m ...

Military imaging optics, such as rifle scopes, spotter scopes, and optics found on unmanned vehicles could be substantially better if the mechanical movement of optics for focus and zoom could be eliminated, without creating new problems associated with the rugged and harsh environment. The technology of liquid lenses has surfaced as a possible solution, but these lenses have problems with enviro ...

We provide a novel approach to realizing negative index lenses and lenslet arrays at optical frequencies using a naturally occurring material such as cis-vitamin A, a constituent in some commercially available cod-liver oils. This form of vitamin A has been recently found in the eyes of lobsters and hypothesized to be responsible for negative index lensing in their superposition eyes. The propos ...

Under this proposal, Virtual Global, Inc. proposes to work with NIST to develop RBAC-BASED WORKFLOW, a workflow system that will use RBAC in a web services model as a form of middleware that can be "packaged" accessed, configured, and reused by integrating with existing trusted RBAC implementations.

MCNC PROPOSES A FEASIBILITY STUDY AND EVALUATION OF THREE PROMISING APPROACHES TO THE FABRICATION OF SURFACE TEST STRUCTURES ON SILICON. SURFACE FEATURES ON THE FIRST STRUCTURE WILL BE PRODUCED BY CONTROLLABLY ETCHING THERMALLYGROWN OXIDES. FEATURES ON THE SECOND WILL BE MADE BY ETCHING PIEZOELECTRIC THIN FILMS. USING THE PIEZOELECTRIC FILM AS PART OF A CAPACITOR, STEP-HEIGHT CAN BE VARIED AND PRO ...

A CONCEPT FOR PASSIVE REMOVAL OF WATER FROM COMPRESSED AIR SUPPLY LINES IS PROPOSED. RELYING ON SURFACE TENSION EFFECTS TO REMOVE THE WATER, THIS CONCEPT IS FEASIBLE FROM A PRACTICAL STANDPOINT BECAUSE OF AN INVENTIVE MANUFACTURING APPROACH DEVELOPED BY ALABAMA CRYOGENIC ENGINEERING. THE PHASE I EFFORT INCLUDES THEORETICAL MODELING AND FEASIBILITY TESTING OF CRITICAL ASPECTS OF THE CONCEPT. RESULT ...

A TECHNIQUE FOR OBTAINING TRUSTWORTHY COMPILATION BASED ON A COMPILATION CHECKER (SIMILAR TO A PROOF CHECKER) IS PROPOSED. THE TRANSFORMATIONS USED IN A COMPILER WILL BE FORMALLY SPECIFIED AND VERIFIED USING INTERPRETER EQUIVALENCE METHODS. THE COMPILER WILL BE INSTRUMENTED TO PRODUCE A TRACE OF THE TRANSFORMATIONS APPLIED IN THE COMPILATION OF A GIVEN PROGRAM. THE COMPILATION CHECKER WILL VALIDAT ...

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