Award Data

THIS PROJECT FOCUSES ON THE TWO MOST IMPORTANT ISSUES OF ALL OF COMPUTATIONAL FLUID DYNAMICS: 1) HOW GOOD ARE THE NUMERICAL ANSWERS OBTAINED IN A COMPUTATION? AND 2) HOW CAN THE BEST POSSIBLE ANSWERS BE OBTAINED FOR A FIXED AND LIMITED COMPUTATIONAL EFFORT, BUDGET, OR COMPUTING CAPABILITY? IN GENERAL TERMS THE ANSWERS TO THESE QUESTIONS ARE 1) TO DETERMINE RELIABLE A-POSTERIORI ESTIMATES OF ERROR ...

ABSTRACT: Improvements such as increased array size and better non-uniformity correction have been made to resistive emitter arrays fabricated on silicon (Si). There exist additonal wavelengths of interest whose emitter devices require fabrication in other materials, such as gallium arsenide (GaAs). For both Si and GaAs substrate materials, attempts to"tile"small arrays into larger ones for reaso ...

ABSTRACT: The proposed phase II effort would work to establish new advanced insulation techniques and their corresponding design guidelines that could be employed to reduce the volume existing pulsed power systems, improve their reliability, and possibly improve their mechanical integrity. Additionally, the design of a new pulser is proposed, which will be based on the insulation schemes identifi ...

THE MOST CRITICAL ASPECT OF THE RADIO FREQUENCY POWER SUPPLY FOR THE NEUTRAL PARTICLE BEAM INTEGRATED EXPERIMENT IS ITS POWER TO WEIGHT RATIO. IN ADDITION, THE SPACE-QUALIFIED 45V POWER SUPPLY MUST BE ABLE TO SUPPLY 27,000 AMP PULSES DOWN TO 350 MICROSECONDS WITH ONLY A 2 - 3% VOLTAGE DROP. PROTON EXCHANGE MEMBRANE FUEL CELLS HAVE POTENTIALLY THE HIGHEST POWER TO WEIGHT RATIO OF ANY TYPE OF FUEL C ...

ABSTRACT: Desired tactical requirements for unmanned aerial systems (UASs) exceed current capabilities for performance, reliability, maintainability, cost and supportability. Mission requirements such as extended endurance, increased power for auxiliary/sensor systems, and low altitude, low speed maneuverability are becoming paramount, specifically, in the 10,000 lb class of vehicles. These desi ...

KBSI proposes to develop an innovative experimental framework for an Advanced Visualizations and User Interfaces for Cyber Situational Awareness (ADVICE). The ADVICE framework is a suite of tools in an extensible framework to maximize the situational awareness (SA), individual and team performance, and two way communication between SA and human performance of the cyber system and other target man ...

Our Phase I project addressed the challenge of creating a new paradigm for the development of software in which developers evaluate the performance of software architecture and design options early when it can have the greatest impact. Our vision moves software performance analysis from an isolated set of tools that require laborious manual transfer of information among design and analysis tools t ...

THE CONTRACTOR SHALL DEVELOP A FUZZY SET METHODOLOGY FOR UNCERTAINTY ANALYSIS IN PROBABILISTIC SEISMIC SAFETY ASSESSMENT OF NUCLEAR POWER PLANTS. FUZZY SET LOGIC WILL BEUSED FOR COLLECTING, QUANTIFYING AND PROPAGATING SUBJECTIVE,ENGINEERING JUDGEMENT USED IN THE UNCERTAINTY ANALYSIS. IN PHASE I, FEASIBILITY OF THE PROPOSED APPROACH WILL BE DEMONSTRATED BY APPLYING IT TO SELECTED PARTS OF A PROBABI ...

ABSTRACT: We propose an algorithm for aimpoint maintenance that is robust to large changes in target aspect as well as scintillation and atmospheric turbulence. The approach makes use of flexible, parametrized vehicle models that are capable of representing a vast array of potential targets. Information about the platform orientation collected from on-board sensors and minimal user input provide ...

THE PURPOSE OF THE PROPOSED RESEARCH IS TO DEMONSTRATE A SOFTWARE SYSTEM THAT MAKES CORRELATIONAL/FACTOR TYPE ANALYSES OF LARGE DATA BASES PRACTICAL ON MICROCOMPUTER-CLASS MACHINES, AND IS ABLE TO COMPUTE THE SIGNIFICANCE OF PSYCHOPHYSIOLOGICAL MEASUREMENTS AT A SPEED THAT MAKES REAL-TIME FEEDBACK CONTROL MECHANISMS POSSIBLE. THE SOFTWARE PROTOTYPE DEVELOPED WILL ACCESS A DATA BASE COMPOSED OF A W ...