Stories
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Briefs: Electronics & Computers
As the highest resolution seismic system available, the automated seafloor classification system (ASCS) can remotely and accurately map sediment properties for many seafloor applications. The...
Briefs: Electronics & Computers
Compact analog/digital electronic data processors of a novel type are based on the concept of the optimization cellular neural network (OCNN) and are implemented in very-large-scale...
Briefs: Electronics & Computers
Electrochromic devices change color and light transmissivity upon application of an electric charge. As such they should prove valuable as "smart" windows that can reduce air-conditioning costs...
Briefs: Electronics & Computers
A proposed focal-plane array (FPA) of quantum-well infrared photodetectors (QWIPs) would exhibit peak response at two wavelengths. Heretofore, single-focal-plane arrays of photodetectors optimized for...
Briefs: Electronics & Computers
Cross-diffraction gratings have been proposed to provide optical coupling to quantum-well infrared photodetectors (QWIPs) in focal-plane arrays (FPAs). The cross-grating coupling scheme is...
Briefs: Materials
ICAN/PART - Integrated Particulate Composite Analyzer
The Integrated Particulate Composite Analyzer (ICAN/PART) computer program is a modified version of the Integrated Composite Analyzer (ICAN) program (LEW-15592/LEW-15832), which was developed to conduct analyses of the micromechanics of fiber-reinforced polymer-matrix composite materials....
Briefs: Software
Web-Based Software for Coordinating Work
WWWorkflow is a language-driven, data-base-mediated, web-based process mediation system. WWWorkflow leverages on intranet applications and existing information infrastructure services, making it possible to add workflow management features to preexisting information management systems, without the need for...
Briefs: Photonics/Optics
Laser Doppler velocimetry (LDV) systems have been used for a number of years in field and laboratory applications. The normal LDV system consists of a two-color, four-beam...
Briefs: Electronics & Computers
Passivation by coating with OCG285 (or equivalent) polyimide at critical steps of fabrication has been found to enhance the quality of tapered edges in high-critical-temperature...
Briefs: Software
Virtual-Reality Platform-Independent Software for Access to Mars Data
The Virtual Reality Mars Atlas User Interface (VR-MAUI) provides an atlaslike interface for access to Mars data. This access is provided via the World Wide Web, using JAVA. Within VR-MAUI, images are organized as maps. These maps provide a natural coordinate system, which...
Briefs: Electronics & Computers
A newly developed instrument, designed at Marshall Space Flight Center, uses the resistance to alternating current running through a device to measure the variances in...
Briefs: Electronics & Computers
Reducing Surface Leakage Currents in FPAs of QWIPs
Chemical surface treatments during fabrication have been proposed to reduce surface leakage currents in focal-plane arrays (FPAs) of quantum-well infrared photodetectors (QWIPs). For reasons explained below, if most or all of the surface leakage currents could be eliminated by such treatments,...
Briefs: Electronics & Computers
Image-Matching System Highlights Changes in Skin Lesions
A video imaging and image-data-processing system for use in dermatological examinations acquires and processes images of patients' skins. The system processes a current image of a selected area of a patient's skin along with an image of the same area acquired previously, generating a...
Briefs: Electronics & Computers
A diagnostic signal-analysis technique, called the Phase Synchronized Enhancement Method (PSEM), has been developed. This method allows NASA engineers to retrieve any unique defect...
Briefs: Information Technology
WAN DBMS Search Engine for Scientific Data Formats
A software interface between scientific data formats (SDF's) and wide-area data-base search-engine software has been developed to provide seamless access to data used in support of NASA projects. Most SDF's are known or understood by only a select audience. These SDF's are also only searchable...
Briefs: Software
Software for Modeling Dynamics of Optical Interferometers
The Single Mode Acquisition Code (SMAC) computer program mathematically models the optical, mechanical, and electronic dynamics of high-finesse, long-baseline, multiple-cavity optical interferometers like those used in gravity-wave detectors. Dynamical situations that can be simulated...
Briefs: Information Technology
A method of computational filtering enables the removal of distortions from flight-test data. The method is built upon and adapts the methods of wavelet-transform analysis to the particular...
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