Award Data

70104S02-II Existing devices for collecting atmospheric radiation measurements have many limitations to the performance and accuracy of information derived from the acquired data. For example, some devices can obtain information only at certain fixed wavelengths, some have low spectral resolution, and some have moving components, subject to vibration or shock, that require frequent calibratio ...

70397S02-II The gradients associated with plasma-based accelerators, such as a laser wakefield accelerator, are much larger than those in conventional accelerators. To realize the potential of a laser wakefield accelerator and obtain high-energy electrons, it is necessary to (1) provide a means to guide the laser beam, and (2) stage the accelerating module to reduce dephasing. This project wil ...

The Smart Flow system developed by NIST provides a platform to develop standards that promote the interoperability of devices produced by different manufacturers. The NIST system can acquire and process multiple sensor data such as voice and image in real-time. Many applications such as speaker verification, head trackers, etc. can be implemented under the framework. In Phase 1, we have demonstrat ...

70109S02-II Monitoring the development and proliferation of nuclear materials and weapons is an important national objective. Several gases are emitted during the processing of nuclear materials, and their presence at trace levels essentially establishes that nuclear materials are being processed at a given location. However, presently available semiconductor lasers do not have the operating ...

70278S02-II Commercially available photodetectors that operate in the 3-12 micron wavelength range are needed for the Long Wave Infrared (LWIR) monitoring of chemical weapons. However, these photodetectors are susceptible to high degrees of noise, have a low operating bandwidth, and require cryogenic cooling. This project will use indium arsenide antimonide, a compound semiconductor alloy wit ...

70291S02-II This project will demonstrate and produce a greatly improved monolithic differential amplifier and switch, based on AlGaN/GaN High Electron Mobility Transistors (HEMTs) and passive components, that will be capable of operating in the high-temperature oil drilling environment. The GaN-based amplifier will have reduced temperature sensitivity at temperatures up to 400¿C. The amp ...

SPECIAL MILITARY NARROW BEAM ACOUSTIC PROJECTORS AND TRANSMISSION TECHNIQUES CAN BE EASILY ADAPTED FOR COMMERCIAL USE TO ENABLE FISHERMEN OR RESEARCHERS TO DETECT,LOCATE, AND QUANTIFY BIOLOGICAL TARGETS WITH VERY HIGH ACCURACY IN SHALLOW WATER. THE PROPOSED EFFORT WILL PROVIDE A METHOD FOR PRODUCING VERY NARROW ACOUSTIC BEAMS WITH VIRTUALLY NO SIDELOBES FROM A SMALL APERTURE PROJECTOR ARRAY. ALSO ...

THE AERATED FLOW COMBUSTOR (AFC) IS A NEW, ADVANCED CONCEPT OF COMBUSTOR DESIGN, APPLICABLE TO THE HIGH EFFICIENCY, CLEAN, DIRECT COMBUSTION OF COAL, COAL SLURRIES, MOST SOLID AND LIQUID FUELS, AND HAZARDOUS WASTES. AFC IS BASED UPON AN ADVANCED, INTEGRATED, INTERDISCIPLINARY COMBINATION OF TECHNOLOGIES, INCLUDING FLUIDIZED BED COMBUSTION, AERATED FLOW OF SOLIDS, AND CIRCULATION-LOOP GAS-SOLIDS CA ...

BRAZING GRAPHITE TO GRAPHITE OR TO OTHER MATERIALS IS DIFFICULT SINCE GRAPHITE IS NOT READILY WET BY MOST CONVENTIONAL BRAZE FILLER METALS. BECAUSE THE BONDING MECHANISM DEPENDS ON CARBIDE FORMATION, THE FILLER METALS USED FOR JOINING GRAPHITE TO GRAPHITE OR OTHER METALS MUST CONTAIN AN ELEMENT THAT HAS A STRONG TENDENCY TO FORM CARBIDES WITH THE GRAPHITE. THIS PROJECT INVOLVES BRAZING GRAPHITE AN ...

PRESENT TECHNIQUES FOR OBTAINING INFORMATION FROM SEQUENCED ELECTROPHORESIS GELS RELY HEAVILY ON X-RAY FILM AS THE RECORDING MEDIUM. SUCH FILM SUFFERS FROM LIMITED DYNAMIC RANGE, NONLINEAR RESPONSIVITY, AND TIME-CONSUMING DEVELOPMENT TECHNIQUES. THIS PROJECT INVOLVES NEW RECORDINGMEDIA FOR AN AUTOMATED GENOME MAPPING SYSTEM. THE MEDIA AREDIFFERENT FORMULATIONS OF PROPRIETARY ELECTRON TRAPPING MATE ...