Award Data

THERE ARE AN ESTIMATED 600,000 CHILDREN UNDER SIX YEARS OLD WITH ELEVATED BLOOD LEAD LEVELS AND ONLY 5,000 PER YEAR UNDERGOING TREATMENT; AS YET, NO TECHNIQUE IS AVAILABLE TO MEASURE TOTAL BODY LEAD BURDEN. THIS PROPOSAL DESCRIBES A TECHNIQUE WHICH USES X-RAY FLUORESCENCE IN A TRANSMISSION GEOMETRY TO MEASURE THE TOTAL BODY-BURDEN OF LEAD, IN VIVO, NONINVASIVELY. A SYSTEM USING A GOLD CALIBRATION ...

THE LONG-RANGE GOAL OF THIS PROGRAM IS THE DEVELOPMENT AND COMMERCIALIZATION OF PROTON ACCELERATORS SUITABLE FOR RADIATION THERAPY OF CANCER IN HOSPITAL OR CLINICAL SETTINGS. FOR THIS PURPOSE THE ACCELERATOR SHOULD HAVE AN ENERGY UP TO 250 MEV, AND MUST BE SIMPLE, RELIABLE, AND INEXPENSIVE COMPARED TO EXISTING ACCELERATORS FOR PHYSICS APPLICATIONS. IN ADDITION, WITH SUFFICIENT INNOVATION, IT COULD ...

BECAUSE OF THE COMPLEXITY OF GEOMETRY, LOADS AND MATERIAL SYSTEMS OF TURBINE BLADES, THE STRESS AND STRENGTH CHARACTERISTICS CAN NOT BE ACCURATELY PREDICTED BY EXISTING METHODS. THE COMPOSITE TURBINE BLADE STRENGTH CAPABILITIES ARE VERY MUCH DEPENDENT UPON THE CONSTITUENT MATERIAL PROPERTIES, PLY ORIENTATIONS AND STACKING SEQUENCE. THE OBJECTIVE OF THE PROPOSED STUDY IS TO DEVELOP A TECHNIQUE TO P ...

METAL MATRIX COMPOSITES THAT MAY BE USED IN DEEP SPACE VEHICLES MIGHT HAVE SEVERE INTERNAL STRESSES DUE TO THE THERMAL EXPANSION DIFFERENCES BETWEEN THE MATRIX AND THE FIBERS. SINCE THE TEMPERATURES EXPERIENCED WITH THESE VEHICLES MAY BE AS LOW AS A FEW DEGREES ABOVE ABSOLUTE ZERO, IT IS NECESSARY TO KNOW THE THERMAL MECHANICAL BEHAVIOR OF METAL MATRIX COMPOSITES TO BE USED AS STRUCTURAL MATERIALS ...

THE OVERALL OBJECTIVE OF THE PHASE I PROGRAM IS TO DEMONSTRATE THE FEASIBILITY OF NEWLY DEVELOPED ADVANCED PERMEABLE MEMBRANES FOR THE COMBINED DUTIES ON MILITARY AIRCRAFT OF NITROGEN GENERATION TO INERT FUEL TANKS AND OXYGEN GENERATION FOR PILOT BREATHING IN A UNIQUE SYSTEM ARRANGEMENT. THESE COMPACT AND LIGHTWEIGHT MEMBRANES LEND THEMSELVES TO A MORE EFFICIENT OBIGGS/OBOGS DESIGN COMBINATION THA ...

A MODULAR INPUT/OUTPUT SUBSYSTEM IS PROPOSED TO PROVIDE INTERFACE BETWEEN EXPERIMENTAL DATA ACQUISITION SYSTEMS USING THE CAMAC OR FASTBUS STANDARDS AND NEW-GENERATION DIGITAL EQUIPMENT CORPORATION MINICOMPUTERS. THE SYSTEM OFFERS A POTENTIAL TENFOLD INCREASE IN THE SPEED OF DATA ACQUISITION OVER CURRENT SYSTEMS. IT INCLUDES SUFFICIENT COMPUTER INTELLIGENCE TO MANAGE DATA TRANSFERS BETWEEN THE EXP ...

WE PROPOSE TO INVESTIGATE THE POTENTIAL OF THE UNIQUE SCRIBE HIGH RESOLUTION ATMOSPHERIC EMISSION SPECTRA AND ITS DIURNAL VARIATION IN SEVERAL APPLICATIONS. WE WILL VALIDATE THE SPECTRA BY COMPARISON WITH CALCULATED REFERENCE SYNTHETIC SPECTRA AND WITH OTHER SYNTHETIC SPECTRA. WE WILL CHECK TO SEE WHETHER DISCREPANCIES CAN BE REDUCED OR ELIMINATED BY VARYING THE PROFILES OF TRACE GASES, AND WHETHE ...

THE PROPOSED STUDY WILL DETERMINE CLOUD PROPERTIES FROM SIMULATED MULTISPECTRAL DMSP OLS DATA BY COMBINING A SCENE MODEL APPROACH WITH A VARIETY OF CLOUD PARAMETER RETRIEVAL METHODS. THE MULTISPECTRAL OLS DATA WILL BE CREATED BY RESAMPLING LANDSAT THEMATIC MAPPER SPATIALLY AND SPECTRALLY. THE PROPOSED SENSOR HAS SEVERAL SPECTRAL BANDS WHICH, IN PRINCIPLE, ALLOW CLOUD AMOUNT AND HEIGHT TO BE RETRIE ...

THIS PROPOSAL IDENTIFIED A NEW TYPE OF LASER-INDUCED EPITAXIAL GROWTH PROCESS TERMED LASER-INDUCED SURFACE CHEMICAL EPITAXY (LSCE), AND ADDRESSES KEY ISSUED RELATING TO THE FEASIBILITY OF THE TECHNIQUES. THE POTENTIAL ADVANTAGES OF LSCE INCLUDE LAYER-BY-LAYER CONTROL OVER STOICHIOMETRY, ABRUPT INTERFACES, AND LOW GROWTH TEMPERATURES. ADDITIONALLY, LSCE MAY BE USED TO DEPOSIT A WIDE VARIETY OF MATE ...

A MOSAIC INFRARED SCENE SIMULATOR (MISS) PROVIDE A SIMULATION WITH 10 TO THE 6TH POWER OR MORE INDIVIDUALLY SETABLE PIXELS. THE MISS USES A MICROLITHOGRAPHIC PROCESS TO GENERATE A MOSAIC OF INDIVIDUAL DIFFRACTION GRATINGS WITH THE DIFFRACTION EFFICIENCY OF EACH PIXEL BEING SET IN THE GRATING GENERATION PROCESS. BECAUSE THE SCENE IS A DIFFRACTION GRATING, OVERCOATED WITH A HIGHLY REFLECTIVE ME META ...