Abstract:THIS PROJECT RELATES TO POWER OR ENERGY CONVERSION SYSTEMS UTILIZING LIQUID METALS WITH CONDENSATION PHASE CHANGE. THEAPPLICATION ADDRESSED HERE IS ALKALI METAL THERMOELECTRIC CONVERSION (AMTEC) SYSTEMS, THERMALLY REGENERATIVE ELECTROCHEMICAL DEVICES FOR THE DIRECT CONVERSION OF HEAT TOELECTRICAL… more
Abstract:THERE IS STRONG POTENTIAL FOR IMPROVING THE QUALITY OF THIN FILMS GROWN BY CHEMICAL VAPOR DEPOSITION (CVD) THROUGH PROCESSING IN THE MICROGRAVITY ENVIRONMENT OF SPACE. NUMERICAL MODELING TOOLS WHICH CAN PREDICT IMPORTANT CVD PROCESS BEHAVIOR WOULD ACCELERATE ACHIEVEMENT OF THIS POTENTIAL THROUGH… more
Abstract:ADVANCED FERROELECTRIC MEMORY DEVICES COMBINE THE FAST ACCESS TIME OF SEMICONDUCTOR RAMS WITH THE NONVOLATILITY OF MAGNETIC STORAGE TO CREATE AN IDEAL STORAGE MEDIUM. RECENT ATTEMPS TO REALIZE SUCH DEVICES HAVE BEEN ONLY PARTIALLY SUCCESSFUL; LIMITED SWITCHING LIFETIMES CAUSED BY FATIGUE IN THE… more
Abstract:MEASUREMENT OF CRITICAL TRACE LEVEL ELEMENTS IN SEMICONDUCTING MATERIALS MAY BE POSSIBLE USING A SPECIAL ATOMIC ABSORPTION SPECTROPHOTOMETRY TECHNIQUE. DIRECT VAPORIZATION OF SOLID SAMPLES COMBINED WITH A HIGHLY EFFICIENT SYSTEM TO CORRECT FOR NON-ANALYTE ABSORPTION WILL BE INVESTIGATED ON CDTE… more
Abstract:AURORA OPTICS PROPOSES TO DEVELOP AND DEMONSTRATE A FIBER-OPTIC FLUID FLOW SENSOR USING THE PHOTOELASTIC EFFECT TO DIRECTLY MODULATE THE AMPLITUDE OF A BEAM OF LIGHT. BY MOUNTING A PHOTOELASTIC PRESSURE SENSOR ON THE SIDE OF A VORTEX-SWIRL FLOW HOUSING, PRESSURE PULSES MAY BE SENSED. THE PRESSURE… more
Abstract:THIS PROJECT WILL DETERMINE THE TECHNICAL FEASIBILITY AND POTENTIAL UTILITY OF DEVELOPING MIS SOFTWARE FOR TRACKING SERVICES TO YOUNG CHILDREN WITH DISABILITIES AND THEIR FAMILIES ACROSS MULTIPLE SERVICE PROVIDERS. THE PROJECT ADDRESSES THE IMPORTANT NEED TO DEVELOP MIS SOFTWARE SPECIFICALLY… more
Abstract:OBJECTIVE MEASURES ARE NEEDED OF THE TARGET ACQUISITION REDUCTION (TAR) AFFORDED PERSONNEL BY CAMOUFLAGE; SUBJECTIVE MEASURES ARE EXPENSIVE, UNREPEATABLE AND DIFFICULT TO COMPARE BETWEEN FIELD AND LABORATORY TRIALS. THE OBJECTIVE MEASURES MUST BE BASED ON FACTORS AFFECTING HUMAN PERFORMANCE. WE… more
Abstract:THE DIFFERENTIAL INVERSION TECHNIQUE DEVELOPED BY KING SHOWS EXCITING PROMISE AS A MEANS FOR OBTAINING ATMOSPHERIC TEMPERATURE PROFILES FROM UPWELLING INFRARED AND MICROWAVE RADIANCE DATA WITHOUT THE USE OF A PRIORI INFORMATION ABOUT THE STRUCTURE OF THE ATMOSPHERE. THE DEFENSE METEOROLOGICAL… more
Abstract:NASA CURRENTLY HAS SEVERAL ASTROPHYSICS MISSIONS PLANNED IN WHICH HELIUM REPLENISHMENT IS IMPORTANT. ONE OF THE TWO LEADING CANDIDATE REPLENISHMENT SYSTEMS REQUIRES A MECHANICAL PUMP. THIS PROGRAM IS INTENDED TO DEVELOP A LONG-LIFE CENTRIFUGAL PUMP TO MEET THESE REQUIREMENTS. IN PHASE I, A… more
Abstract:STRONG EVIDENCE EXISTS THAT ELEVATED TEMPERATURES, IN THE RANGE OF 42 TO 45 DEGREES(C) (HYPERTHERMIA), ARE AN IMPORTANT FACTOR IN THE DESTRUCTION OF CANCER CELLS, ESPECIALLY WHEN COMBINED WITH RADIATION THERAPY AND CHEMOTHERAPY. PRODUCING A CONTROLLED-TEMPERATURE DISTRIBUTION OF A GIVEN MAGNITUDE IS… more
Abstract:IN THIS PROJECT, WE PROPOSE TO DEVELOP A MULTIGRID SOLVER FOR INTERNAL FLOWS USING GENERALIZED SOLUTION ADAPTIVE MESHES COMPOSED OF TRIANGULAR OR TETRAHEDRAL MESH CELLS. THE RESULTING COMPUTER PROGRAM WILL PERMIT THE SOLUTION OF THREE-DIMENSIONAL TRANSONIC VISCOUS FLOWS IN STATIONARY AND ROTATING… more
Abstract:ACTIVE COOLING IS ESSENTIAL FOR FUSION REACTOR COMPONENTS EXPOSED TO HIGH HEAT FLUX LEVELS OVER LONG PULSE DURATIONS. EXISTING WATER COOLING CONCEPTS FACE A POTENTIAL PROBLEM WITH TRITIUM PERMEATION. HELIUM GAS COOLING CONCEPTS NOW BEING CONSIDERED SUFFER FROM LOW HEAT TRANSFER COEFFICIENTS AND HIGH… more
Abstract:SEVERAL OF THE LONG-LIFETIME CRYOCOOLERS BEING DEVELOPED FOR SPACE SENSOR APPLICATIONS ARE BASED ON THE REVERSE-BRAYTON CYCLE. AN ATTRACTIVE IMPLEMENTATION OF THE CYCLE WOULD USE HIGH-SPEED, MINIATURE CENTRIFUGAL COMPRESSORS AND TURBOEXPANDERS RUNNING ON GAS BEARINGS TO PROVIDE RELIABLE AND… more
Abstract:THIS PROPOSAL DESCRIBES A NOVEL CONCEPT FOR A SINGLE-PHASE HEAT EXCHANGER WHICH ATTAINS VERY HIGH HEAT TRANSFER RATES WITH VERY LOW PRESSURE LOSSES. THE NEW HEAT EXCHANGER OFFERS POTENTIAL BENEFITS TO THE SPACE STATION THERMAL CONTROL SYSTEM, PARTICULARLY THE LIVING MODULE TO THERMAL BUS HEAT… more
Abstract:SEISMIC TESTS PROVIDE IMPORTANT DATA FOR IMPROVING THE SAFETY OF PIPING DESIGNS AND THE COST-EFFECTIVENESS OF DESIGN STANDARDS. UNFORTUNATELY, DISPLACEMENT MEASUREMENTS AT LOW FREQUENCIES FROM SUCH TESTS ARE GENERALLY UNAVAILABLE, EITHER BECAUSE DOUBLE INTEGRATION OF ACCELEROMETER SIGNALS CAUSES… more
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