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Briefs: Software
Program Improves Transfer of Data From CAD to Machine Shops
The EMNet computer program has been developed to overcome the difficulties and reduce the errors that, heretofore, have been encountered in transferring data from computer-aided design (CAD) systems to computer numerically controlled (CNC) machines. EMNet could improve operations in almost...
Briefs: Information Technology
A method of processing data acquired by ultra-wide-band (UWB) syntheticaperture radar (SAR) provides for suppression of those errors that are caused by the undesired relative motion of the radar...
Briefs: Software
Program for International-Temperature-Scale Calculations
A computer program implements several aspects of the International Temperature Scale of 1990 (ITS90).
Briefs: Software
Updated Global Atmospheric Reference Model Computer Programs
The 1999 version of the NASA/Marshall Space Flight Center Global Reference Atmospheric Model (GRAM-99) and version 3.8 of the Mars Global Reference Atmospheric Model (Mars- GRAM) are the latest in two series of computer programs for calculating selected physical properties of the...
Briefs: Software
Gyroscope Automated Testbed
The Gyroscope Automated Testbed (GAT) is a fully automated inertial device characterization testbed. Rotational response parameterization and shortterm noise stability analysis are the fundamental principles behind the system. Complete response characterization, bias stability, sensitivity, and range are supported along...
Briefs: Materials
Since its invention in 1948, the transistor has revolutionized everyday life. The electronics revolution is based on miniaturization of transistors; smaller transistors are faster, and...
Briefs: Electronics & Computers
“Flip chip on board (FCOB) with high thermal conductivity and tailored coefficient of thermal expansion (CTE)” denotes a developmental concept for relatively inexpensive,...
Briefs: Electronics & Computers
Printed-wiring boards (PWBs) that are especially suitable as substrates for highly reliable, lightweight electronic circuits for aircraft and spacecraft have been developed. Like...
Briefs: Materials
Thin films of Li2CO3 are under consideration for use as passivating layers between electrodes and solid electrolytes in advanced thin-film lithium-ion electrochemical cells. By...
Briefs: Aerospace
NASA’s F-15B #836 is a two-seat version of the F-15, which is a high-performance, supersonic, all-weather fighter airplane. The F-15B is used as a test-bed aircraft for a wide variety of...
Briefs: Mechanical & Fluid Systems
An improved alignment mechanism and mating procedure have been devised for a robotic drilling system in which there is a need to assemble drill stem rods for sampling soils and rocks on a...
Briefs: Mechanical & Fluid Systems
A technique for measuring the volume of an incompressible liquid in a rigid tank involves measurement of the total volume of gas in those parts of the tank not occupied by the liquid....
Briefs: Mechanical & Fluid Systems
A small mobile robot equipped with a stereoscopic machine vision system and two manipulator arms that have limited degrees of freedom has been given the ability to perform moderately...
Briefs: Manufacturing & Prototyping
A process that includes photolithography, liftoff, etching, and sputter deposition has been developed to enable the fabrication of thin, finely patterned layers of gold, platinum,...
Briefs: Manufacturing & Prototyping
Software for Optimized Flattening From 3D to 2D
A computer program offers enhanced capabilities for calculating two-dimensional (2D) patterns needed to construct specified three-dimensional (3D) surfaces to within acceptably close approximations, with minimal waste of sheet material. Examples of complexly shaped sheet-material items that could be...
Briefs: Manufacturing & Prototyping
Electron-Beam Welding of Superalloys at High Temperatures
Electron-beam welding at high temperatures has been found to be a suitable process for joining structural components made by casting certain superalloys. This process can be used in the fabrication of superalloy parts that must withstand high operating temperatures. Examples of such parts...
Briefs: Medical
An improved method of sterilizing petri-dish spreaders and a spreader design to implement the method have been developed. In comparison with the conventional methods of sterilizing...
Briefs: Medical
Quantifying Microbial Diversity Through Dilution/Extinction
A method of relatively easily, rapidly, and inexpensively quantifying the structural diversity of a multiple-species community of micro-organisms is based on the rate of extinction of phenotypic traits across a dilution gradient of a sample of the community. In this context, the concept of...
Briefs: Physical Sciences
Solar Simulator for a Portable Solar-Absorptance Instrument
A special-purpose solar simulator includes (1) a tungsten lamp that serves as a gray-body radiator with a temperature of 3,200 K and (2) a mosaic of filters such that the filtered lamp output has the same normalized spectral irradiance as that of sunlight outside the atmosphere of the...
Briefs: Electronics & Computers
A computer-based system, and a method built around the use of the system, have been developed to automate the acquisition, integration, and management of data that have been generated...
Briefs: Electronics & Computers
Mixed-Signal Driver ASIC for IEEE 1394 and I²C Buses
The IEEE 1394 and I2C Mixed-Signal Driver is one of two application-specific integrated circuits (ASICs) designed to function together as an interface among the following three digital-signal buses:
A peripheral component interface (PCI) bus;
A high-speed serial data bus that conforms to...
Briefs: Electronics & Computers
Circuits for conditioning AC power supplied to computers are under development. A power conditioner of this type would be an interface between a conventional AC power line and a...
Briefs: Software
Program Injects Random Faults for Testing Computers
JIFI (Jet Propulsion Laboratory's Implementation of a Fault Injector) is a computer program for studying the ability of a computer to tolerate, detect, and/or recover from faults (that is, bit errors). JIFI affords the capability to inject faults into user-specified central- processing-unit (CPU)...
Briefs: Electronics & Computers
A monolithic microwave integrated circuit (MMIC) has been designed to function as a low-power-consumption, low-noise amplifier (LNA) at frequencies from about 65 to about 110 GHz. This MMIC...
Briefs: Electronics & Computers
Monolithic integrated circuits (in particular, Schottky-diode-based frequency multipliers) that operate at frequencies as high as a few terahertz are being developed in a program...
Briefs: Motion Control
The term "COSMOWRAP" denotes a compact, stiff, remotely actuatable, lightweight, quick-release clamp that could be substituted for the larger, heavier, and more-difficult-to-use toggle-action...
Briefs: Photonics/Optics
Cells that contain thin, single-crystal films of photoresponsive organic materials [e.g., meta-nitroaniline (m-NA)] have been invented for use as nonlinear optics and especially as...
Briefs: Photonics/Optics
An optoelectronic oscillator with a nominal operating frequency of 11.763 GHz has been designed and constructed to demonstrate a technique for reducing the sensitivity of the...
Briefs: Photonics/Optics
The figure depicts an apparatus for measuring x-ray diffraction (XRD) and/or x-ray fluorescence (XRF) in a specimen of material. The specimen could be, for example, a standard XRD powder...
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