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Briefs: Electronics & Computers
Two-dimensional active-pixel-spectral lidar (TAPSL) is a proposed remote-sensing technique for obtaining spatially, spectrally, and temporally resolved information about terrain or other targets....
Briefs: Electronics & Computers
Heterodyne Doppler Lidar Using Pseudonoise Code
A low-power, miniature Doppler lidar instrument is being developed for use in measuring opacity (from dust) and wind profiles in the Martian atmosphere. The instrument could also be used on Earth to measure turbulence in the atmospheric boundary layer, for assessments of urban and regional air...
Briefs: Electronics & Computers
Improved Temperature-Compensating Microwave Attenuators
Improved passive temperature-compensating attenuators have been developed for use in processing radio signals at frequencies up to about 18 GHz. In general, temperature-compensating circuits and devices are needed to minimize (preferably, to eliminate) undesired temperature dependences of the...
Briefs: Electronics & Computers
Acoustic Navigation Aid for Autonomous Miners
Miners today use externally powered machines designed to be used by a single operator, the autonomous miner. Many companies offer computer-operated mining equipment that can be used for both high wall and underground applications. Programmable logic controls with ring laser gyroscopes and inclinometers...
Briefs: Electronics & Computers
Microstrip Patch Rectenna With High Output Voltage
A prototype dual-polarization microstrip patch rectenna dimensioned for an operating frequency of 8.51 GHz has been built to demonstrate a design concept for obtaining maximum output voltage from a rectenna of a given size. This rectenna contains nine square microstrip patch antenna elements in a...
Briefs: Electronics & Computers
Lightweight optoelectronic systems built around advanced image sensors and display panels have been proposed for making selected objects appear nearly transparent and thus effectively invisible. These systems are denoted...
Briefs: Electronics & Computers
Data-Filter Algorithm for Monitoring a Power System
An algorithm has been developed for a computer-based electronic system that would aid human ground controllers in monitoring data from sensors in the electric-power system of the International Space Station. Among other things, the algorithm encodes knowledge of human experts; thereby harnessing...
Briefs: Electronics & Computers
Portable ECG/EGG Data Recorder
A portable electronic unit with no moving parts except button switches digitizes and stores a 48-hour record of the myoelectric activity of the stomach and heart as sensed via electrodes on the surface of the abdomen. Just as the more familiar electrocardiogram (ECG) is useful in diagnosing the condition of the heart,...
Briefs: Electronics & Computers
A system for determining the locations of nearby lightning strikes from electric-field and acoustic measurements has been developed and built. The system includes at least three receivers, each...
Briefs: Electronics & Computers
A prototype W-Band, low-noise amplifier has been fabricated by bump-bonding a high-speed, low-noise InP high-electron-mobility (HEMT) transistor onto the previously fabricated passive portion...
Briefs: Electronics & Computers
Innovative optoelectronic encoders for measuring absolute, linear or angular position with super-high resolution have been invented. The new encoders rely on a combination of high-accuracy...
Briefs: Materials
Carbon Nanotubes as Anodes in Rechargeable Lithium-Ion Cells
Carbon nanotubes (also known as "bucky tubes") have shown promise for use as anode materials in rechargeable lithium-ion power cells. In comparison with graphite and other forms of carbon used under identical conditions, bucky tubes exhibit greater specific discharge capacity and greater...
Briefs: Electronics & Computers
Fatigue cracks and plastic deformation of parts in jet aircraft engines could be detected, even during engine operation, by use of proposed in situ monitoring devices called "wireless...
Briefs: Electronics & Computers
Planar arrays of cadmium zinc telluride photodetectors with readout electronic circuitry have been developed for use as hard-x-ray and y-ray image sensors. When a coded,...
Briefs: Electronics & Computers
A transceiver has been developed to serve as a data-communication link between (1) the RS-232-standard serial communication port of a personal computer (PC) running the Windows 95 or Windows NT operating system...
Briefs: Electronics & Computers
Special-purpose, "intelligent," computer-controlled, highly miniaturized radio transceivers have been proposed for use in monitoring critical and/or valuable pieces of equipment. These...
Briefs: Electronics & Computers
A method of designing fault-tolerant networks of computers and other electronic circuits has been conceived with a view toward minimizing costs by utilizing commercial off-the-shelf (COTS)...
Briefs: Electronics & Computers
A method of correcting for defective pixels in an integrated-circuit image sensor of the active-pixel sensor (APS) type has been proposed. The corrections would be made by additional...
Briefs: Sensors/Data Acquisition
Electrobiotic sensors have been proposed for detecting toxic substances in a variety of environments. Electrobiotic sensors would be inexpensive, compact units that would be easy to use and could be deployed...
Briefs: Electronics & Computers
Electric generators and magnetic-field sensors of a proposed type would be based on the magnetoelectric effect. A simple device of this type (see figure) would consist mainly of an inner layer of...
Briefs: Electronics & Computers
Submillimeter-sized thermoelectric devices based on thick films of Bi2–xSbxTe3 are undergoing development. As electronic circuits are designed with ever greater packaging densities and...
Briefs: Electronics & Computers
High-Speed Complex-Amplitude Liquid-Crystal SLMs
High-speed complex-amplitude spatial light modulators (SLMs) containing liquid crystals with pixel electronic circuitry on single-crystal-silicon backplanes are undergoing development. The basic approach taken in this project is to use fast-switching liquid-crystal materials and modulation-enhancing...
Briefs: Electronics & Computers
A government/ industry/ academic cooperative has developed a hybrid electric transit bus (HETB). The goals of the development program, which continues, include doubling the fuel economy...
Briefs: Electronics & Computers
A NASA Small Business Innovation Research (SBIR) project has led to the development of high-rate (155.52-Mb/s) modems for use in high-quality wireless data communications. The research was...
Briefs: Electronics & Computers
A microwave phase shifter that can be tuned by varying both electric and magnetic fields has been developed. This device combines all the advantages of prior electrically and magnetically tunable microwave...
Briefs: Electronics & Computers
Recent advances in laser cooling and trapping of neutral atoms in magneto-optic traps (MOTs) would be exploited in ion-trap-based atomic clocks, according to a proposal. Beams of...
Briefs: Electronics & Computers
A prototype system for acoustic imaging of gas leaks that emit ultrasound was developed at Kennedy Space Center. Potential government and commercial users concerned with leak imaging...
Briefs: Electronics & Computers
An improved pseudostereophonic system utilizes digital filtering and head-related transfer functions (HRTFs) to afford tailorability and sound quality not available from older pseudostereophonic systems....
Briefs: RF & Microwave Electronics
A simple microwave power-transmission system has been proposed for maintaining the charge on spacecraft batteries immediately prior to launch. The basic concept of this system could also be applied to other systems...
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