Award Data

HIGH POWER TRANSIT-TIME AMPLIFIERS ARE A NEW CLASS OF RF SOURCE THAT CONVERTS THE KINETIC ENERGY OF AN ELECTRON BEAM INTO RF RADIATION IN A VERY EFFICIENT WAY. WHEN THE BEAM CROSSES THE CAVITY OF PROPER DIMENSIONS, IT WILL INTERACT WITH A SINGLE CAVITY MODE THEREBY RADIATING COHERENTLY AT THE MODE'S FREQUENCY. MODE GROWTH CONTINUES UNABATED UNTIL THE RF FIELDS ARE LARGE ENOUGH TO MODIFY THE BEAM O ...

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A surface film instrumentation (SuFI) system will be developed to measure, in real time, vortex dynamics using advanced non-intrusive hot-film sensors. An innovative 5-element hot-film sensor design will be used to determine the surface streamline direction resulting from the off-surface, three-dimensional vortical flows. Wind-tunnel tests will be conducted on a generic double-delta wing model ...

The use of sub-therapeutic concentrations of anti-microbial agents in animal feed has contributed to theproductivity of the U.S. meat and dairy industries by preventing infectious diseases, by decreasing theamount of feed required and by increasing the rate of animal weight gain. However, failure to observerecommended practices of drug withdrawal can result in concentrations of antibiotic residue ...

IT IS PLANNED TO DEVELOP A MINIATURIZED SURFACE ACOUSTIC WAVE (SAW) VAPOR DETECTION SYSTEM AS A PERSONAL MONITOR FOR TOXIC ORGANIC VAPORS. THE SAW SENSORS ARE VERY PROMISING ASTHEY CAN BE MADE VERY SENSITIVE TO ESSENTIALLY ANY TOXIC ORGANIC COMPOUND WITH AT LEAST MODEST VAPOR PRESSURE. THEY CAN DETECT SOLVENTS SUCH AS BENZENE AND DICHLOROETHANE IN THE LOW PPM RANGE AND MANY OF THE HIGH MOLECULAR, ...

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Systems Planning and Analysis, Inc. (SPA) proposes to develop an open architecture structural health monitoring system for naval ships based on fiber optic Bragg grating and digital telecommunications technologies. This dual-purpose system will allow for simultaneous sensing and transmission of existing analog data streams afloat (i.e., communications, fire control, resistance strain data, etc.) ...

We propose both a new metric for assessing the efficiency of compression algorithms and a novel compression technique that preserves the detection related features of lofargrams and correlograms. The new metric and algorithm are necessary because traditional methods are inappropriate for these IUSS products due to their second order statistics. Our approach preserves the detection and class ...

Statistically sound approaches to making interfrences regarding simulation model validation, rather than reliance upon subjective appeal, are needed. Fundamentally, the question of interest is whether a model reflects reality to the required degree of accuracy. The utility (and hence validity) of a simulation model relies on how well it captures those aspects of the phenonmenon under study that ...

Recent cognitive research indicates that military teams operate effectively in high-stress, information-rich environments when they 1) share mental models of the battlefield situation and the team; 2) critique their situation model to develop clear goals for information retrieval; 3) effectively communicate information needs to others; and 4) anticipate and counteract information overload. We pro ...