Award Data

MANY COMBUSTION EXPERIMENTS INVOLVING PARTICLE SIZING AND RADIATION MEASUREMENT REQUIRE AN ACCURATE KNOWLEDGE OF THE REFRACTIVE (N) AND ABSORPTION (K) INDICES OF SOOT. EVEN THOUGH SOOT IS A COMPLEX HYDROCARBON WITH A PARTICULARLY HIGH C:H MASS RATIO, VALUES FOR N AND K FOR CARBON ARE OFTENUSED AS BEING EQUIVALENT FOR SOOT. LITERATURE VALUES OF N AND K FOR SOOT AND CARBON SHOW WIDE SCATTER: 1.40

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THE HYDROXYL RADICAL (OH) PLAYS A KEY ROLE IN THE PHOTOCHEMISTRY OF BOTH THE TROPOSPHERE AND THE STRATOSPHERE. IT IS THE PRIMARY OXIDIZING AGENT RESPONSIBLE FOR THE REMOVAL OF MOST TRACE GASES INCLUDING CO AND CH4. SINCE THE OH RADICAL DETERMINES THE LIFETIMES AND, THUS, THE CONCENTRATIONS OF MANY CHEMICAL SPECIES, ACCURATE DETERMINATION OF OH CONCENTRATION IS PIVOTAL IN UNDERSTANDING ATMOSPHERI ...

A DIFFUSING-VORTEX METHOD, FOR SOLVING THE TWO-DIMENSIONAL INCOMPRESS NAVIER-STOKES EQUATION, WILL BE EXTENDED AND APPLIED TO THE EXTERNAL INCOMPRESSIBLE VISCOUS FLOW OVER A GENERALLY SMOOTH BLUNT BODY. THE NUMERICAL ADVANTAGES OVER OTHER LAGRANGIAN VORTEX METHODS WILL BE FURTHER DEMONSTRATEDBY REDUCING TOTAL CPU TIME AND BY AVOIDING CUT-OFF PROCEDURES. THE NEW APPROACH WHICH IS AN APPROXIMATE EXP ...

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INTENSE X-RAY SOURCES HAVE BEEN USED IN GEOPHYSICAL RESEARCH PODS TO DETERMINE STRATA FORMATION DENSITY, LITHOLOGY, AND POROSITY. THE SCATTERING OF -RAYS FROM (137)CS OR (60)CO SOURCES WITH DECAY ACTIVITIES OF UP TO SEVERAL CI HAVE BEEN USED EXTENSIVELY IN BOREHOLE LOGGING. A NON-RADIOACTIVE PHOTON SOURCE IS HIGHLY DESIRABLE SINCE IT REDUCES THE RADIOLOGICAL HANDLING RISK AND THE RISK OF DOWN HOLE ...

THE COMBINATION OF GAS CHROMATOGRAPHY WITH MASS SPECTROMETRY(GC/MS) PROVIDES THE BEST GENERAL PURPOSE ANALYTICAL INSTRUMENT FOR SENSITIVE CHARACTERIZATION OF COMPLEX MIXTURES. IT IS USED IN THE FIELDS OF CHEMISTRY, BIOLOGY, GEOCHEMISTRY, ENVIRONMENTAL SCIENCE AND FORENSICS. IN MOST CASES, THE GAS CHROMATOGRAPH SEPARATES THE STARTING MIXTURE INTO ITS CONSTITUENT COMPOUNDS PRIOR TO ANALYSIS BY THE M ...

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A VAST BODY OF INFORMATION ON THE NATION'S CULTURAL RESOURCES, COLLECTED LARGELY WITHIN THE LAST TWENTY YEARS BY LEGAL MANDATE, EXISTS IN STATE AND FEDERAL ARCHIVES. MUCH OF THIS INFORMATION IS IN DIGITAL FORM, BUT EVEN MORE RESIDES ON PAPER FORMS AND MAPS. GEOGRAPHIC INFORMATION SYSTEMS (GIS) TECHNOLOGY, WHICH HAS ONLY BECOME WIDELY AVAILABLE IN A PRACTICAL SENSE WITHIN THE LAST FEW YEARS, OFFE ...

ION BEAM FIGURING TECHNIQUES WILL BE APPLIED TO FIGURE ASPHERE OPTICAL ELEMENTS. A MIRROR WILL BE ASPHERIZED TO REMOVE THE R(0)6 ZERNIKE CONTRIBUTION TO CORRECT FOR THIRD-ORDER AND FIFTH-ORDER SPHERICAL ABBERRATION AND DEFOCUS. IN ADDITION, A PHASE CORRECTION PLATE WITH THE SAME OPTICAL CORRECTION WILL BE INVESTIGATED FOR FABRICATION. SIMULATED ION BEAM FIGURING OF MORE COMPLEX ELEMENTS WILL BE IN ...