Briefs : Electronics & Computers
Tunable HTS/Ferroelectric Microstrip Band-Pass Filters

Electrically tunable microstrip two-pole band-bass filters for a center frequency near 19 GHz and a 4-percent bandwidth have been designed, fabricated, and demonstrated to be functional. These filters are suitable for use in the front ends of K-band communication receivers that operate at...

Briefs : Materials
Reducing Methanol Crossover in CH3OH-Fuel-Cell Membranes

Improved polymer electrolyte membranes for direct methanol fuel cells can be made by impregnating the baseline membrane material with cross-linked polystyrene (a copolymer of styrene and divinylbenzene). The baseline membrane material is a perfluorosulfonic acid-based hydrophilic,...

Briefs : Mechanical & Fluid Systems
Inflatable Wing Leading Edges for High Lift and Deicing

Computational simulations and wind-tunnel tests have demonstrated the feasibility of using inflatable boots on the leading edges of airplane wings, both as devices to increase lift and as pneumatic deicing actuators. Assuming success in further research and development, the first...

Briefs : Information Technology
Expert System To Develop Job Standards

The Job Standards Development System is a user-friendly expert system that (1) helps users select an appropriate work measurement methodology to develop job standards (or the less formal job time estimates) and (2) leads the users through the steps necessary to use a work time estimating technique to...

Briefs : Information Technology
Further Developments in Web Interactive Training

Three innovative computer programs for training and testing personnel at Kennedy Space Center have been developed under the aegis of the Web Interactive Training (WIT) project. The WIT project exploits the capabilities afforded by the Internet and by state-of-the-art multimedia data-presentation...

Briefs : Electronics & Computers
Using Narrow-Band Data Links in Locating Lightning Strikes

A method of preprocessing lightning-measurement waveforms has been devised to reduce the bandwidth needed to transmit data for computing the locations of lightning strikes. The method is used in a system in which electric fields and electric-field derivatives induced by lightning are...

Briefs : Electronics & Computers
Centralized Electronic Reporting of Material-Science Tasks

The Materials Science Division (MSD) at Kennedy Space Center is developing a computer system to maintain a material-science data base coupled with a user-friendly interface on the World Wide Web. The system is designed to eliminate the need for time-consuming and expensive distribution...

Briefs : Mechanical & Fluid Systems
Nonintrusive Flow-Measurement System

A nonintrusive flow-measurement system based on ultrasonics has been developed to replace a system based on turbine flowmeters. A turbine flowmeter must be mounted in line with a pipe; this raises the possibility of leakage at the flowmeter/pipe joints, and the flowmeter unavoidably perturbs the flow....

Briefs : Materials
Composite-Material Heat Sink for Printed-Circuit Boards

A laminated composite-material plate has been developed for use as a lightweight heat sink and mechanical support for rigid printed-circuit boards (PCBs) that hold surface-mounted electronic components. This composite-material plate is intended to replace a conventional aluminum heat-sink...

Briefs : Information Technology
Post-Processing Satellite Image Data in Secondary Schools

Never before have secondary schools been able to post-process raw satellite data, and now they can do it in real time. This is credited to advances in technology that have recently made the necessary equipment simple, inexpensive, powerful, and available enough for any school to fit into...

Briefs : Electronics & Computers
Return-Link Processor PCI Card

The return-link processor card (RLP) performs all of the fundamental data-processing functions involved in the return of satellite telemetry, in real time at rates up to 400 Mb/s, using industry-standard interface circuitry and connectors with standard sizes and shapes. Previously, four cards, each containing a...

Briefs : Physical Sciences
GFSSP — Program for Analyzing Flows in a Complex Network

The Generalized Fluid System Simulation Program (GFSSP) version 2.01 is a general-purpose computer program for analyzing steady-state and time-dependent flowrates, pressures, temperatures, and concentrations in a complex flow network. The program is capable of modeling phase changes,...

Briefs : Photonics/Optics
Software for Processing Data in Particle-Image Velocimetry

PIVPROC is a computer program for processing data in particle-image velocimetry (PIV), which is a method of determining a flow velocity field from images of small seed particles that are entrained in the flow and that are illuminated by laser pulses at known intervals of time. PIVPROC...

Briefs : Photonics/Optics
Current-Mode Dark-Level Subtraction in LWIR Imaging

A complementary metal oxide/semiconductor (CMOS) focal-plane readout circuit for an imaging array of long-wavelength infrared (LWIR) photodetectors effects in-pixel current-mode subtraction of the dark-level component of each photodetector output. The dark-level signal is subtracted before the...

Briefs : Photonics/Optics
High-Power, Wideband Laser-Diode Transmitter Module

A prototype compact, rugged optomechanical module contains a high-power, wideband laser-diode transmitter. The laser diode is of a commercial single-quantum-well AlGaAs type. Each laser diode of this type is manufactured for a specific nominal wavelength in the range from 810 to 860 nm; the...

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