Award Data

DIRECT COMPUTATION OF TURBULENCE NOISE IS A LOGICAL APPLICATION FOR ADVANCED COMPUTATIONAL FLUID DYNAMICS, CFD, PROGRAMS RUN ON SUPERCOMPUTERS. THIS WOULD ELIMINATE THE HIGHLY EMPIRICAL ASPECTS OF PRESENT NOISE PREDICTION TECHNIQUES AND ENABLE STUDY OF ADVANCED HYPERSONIC PROPULSION SYSTEMS. HOWEVER, MANY OF THE SAME PERSISTENT PROBLEMS OF IMPLEMENTATION THAT EXIST IN AEROACOUSTIC THEORY AND MEASU ...

THE DIGITAL ACTIVE MATERIALS-PROCESSING PLATFORM EFFORT BE- ING PROPOSED HERE SEEKS TO DEVELOP AN ACTIVELY STABILIZD PLATFORM UPON WHICH MICRO-G MATERIALS PROCESSING EXPERIMENTSCAN BE PERFORMED IN SPACE. WITH THE SUC- CESSFUL COMPLETION OF THE TWO-STEP PHASE I WORKPLAN APPLIED TECHNOLOGY ASSOCIATES (ATA) HAS CLEARLY AND SUCCINTLY DEFINED THE PROBLEM OF PLATFORM ISOLATION IN SPACE AND HAS COMPLETEL ...

COMPUTATIONAL FLUID DYNAMICS (CFD) TOOLS HAVE NOW DEVELOPED TO THE POINT WHERE THEY CAN BE RELIABLY USED FOR THE DESIGN,EVALUATION, AND ANALYSIS OF SUCH HIGH-PERFORMANCE GAS TURBINES AS THOSE USED IN MODERN AERONAUTICAL PROPULSION SYSTEMS. FOR THESE APPLICATIONS, IT IS NECESSARY TO USE A THREE-DIMENSIONAL VISCOUS CFD CODE THAT COMBINES EFFICIENCY,ACCURACY, AND USER-FRIENDLINESS. FOR AXIAL TURBOMAC ...

THE ROTORCRAFT COMMUNITY HAS A CONTINUING NEED FOR IMPROVED DESIGN TECHNIQUES FOR HOVER AND AXIAL FLIGHT. SUCH TECHNIQUES CAN BE EMPLOYED TO BEST ADVANTAGE IF THEY ARE COUPLED WITH NUMERICAL OPTIMIZATION METHODS. THIS COUPLING WOULD MINIMIZE TRIAL AND ERROR COMPUTATIONS WHEN SEARCHING FOR CONFIGURATIONS TO MEET PARTICULAR DESIGN SPECIFICATIONS. A NEW, HIGHLY ADVANCED HOVER PERFORMANCE ANALYSIS REC ...

WE PROPOSE TO OPTIMIZE EPITAXIAL LAYERS OF IN.53GA.47AS ALLOYS WHICH DETECT LIGHT IN THE 1.0-1.7 MICRON SPECTRAL REGION. THE GOAL OF THE PROGRAM IS TO BRING THE YIELD OF INGAAS PHOTODIODES TO SUCH A LEVEL THAT PRODUCTION OF MULTI-ELEMENT (>50) LINEAR ARRAYS WITH 10% UNIFORMITY BECOMEPRACTICAL WITHIN THE PHASE I EFFORT. WE PLAN TO GROW DETECTOR STRUCTURES IN OUR HYDRIDE VAPOR PHASE EPITAXIAL (VPE) ...

A recently developed mathematical folding theory has great value for deployable space structures and in situ manufacture of large beams, panels and cylinders. The new technology offers diverse capacity to design, manufacture, and self-assemble periodically folded sheet material. The range of materials includes many customized core materials for laminated panels, cellular habitat walls, structura ...

BONE WEAKENING IS A CONCERN FOR ASTRONAUTS, WHO NOW EXERCISEIN FLIGHT TO PREVENT LOSS OF BONE IN THE LEGS AND FRACTURE ON LANDING. USING INNOVATIVE METHODOLOGY, THIS PROJECT WILL DESIGN AN INSTRUMENT THAT PROVIDES DIRECT, NON-INVASIVE, ACCURATE, AND REPRODUCIBLE MEASUREMENTS OF BONE STIFFNESS, A COMPONENT OF BONE STRENGTH. THE LONG BONES OF THE LOWER EXTREMITIES OF HUMANS AND LARGER SPECIES OF ANI ...

AN OPTICAL PARAMETRIC OSCILLATOR (OPO) CAN PROVIDE HIGH-POWER, INFRARED TUNABLE OVER A BROAD RANGE. THE DEVELOPMENT OF OPO DEVICES HAS BEEN LIMITED BY THE SCARCITY OF HIGH-QUALITY, NON-LINEAR CRYSTALS AND LOW LASER-DAMAGE THRESHOLD. ZNGEP2 SINGLE CRYSTALS HAVE AN EXCEPTIONALLY HIGH FIGURE OF MERIT (D(2)/N(3), WHERE D IS THE NON-LINEAR COEFFICIENT AND N IS THE INDEX OF REFRACTIONS THAT IS APPROXIMA ...

THE RESEARCH PROGRAM WILL DEVELOP A MICROCOMPUTER BASED SYSTEM OF HARDWARE AND SOFTWARE WHICH WILL ALLOW THE USER TOEXECUTE MAINFRAME BASED CODES ON THE MICROCOMPUTER. IN ADDITION PARALLEL EXECUTION OF SEVERAL CODES AT ONCE IS POSSIBLEA SPECIAL INPUT AND OUTPUT PROCESSOR MODULES WILL ALSO BE DEVELOPED TO DEMONSTRATE THE USER FRIENDLY CAPABILITIES OF THE SYSTEM AND FACILITATE INPUT PREPARATION AND ...

IN THIS PROJECT, ION-BEAM-FIGURING TECHNIQUES WILL BE APPLIED TO FIGURE ASPHERIC OPTICAL ELEMENTS. A LENS WILL BE CORRECTED FOR 5TH-ORDER ABERRATIONS AS A DEMONSTRATION. SIMULATED ION-BEAM FIGURING OF MORE COMPLEX ELEMENTS WILL BE PERFORMED TO ILLUSTRATE THE POWER OF THE TECHNIQUE. IN THIS PROJECT, ION-BEAM-FIGURING TECHNIQUES WILL BE APPLIED TO FIGURE ASPHERIC OPTICAL ELEMENTS. A LENS WILL BE COR ...