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Briefs: Mechanical & Fluid Systems
The Planetary Autonomous Amphibious Robotic Vehicle (PAARV), now at the prototype stage of development, was originally intended for use in acquiring and analyzing samples of solid,...
Briefs: Mechanical & Fluid Systems
A system for automated sampling of rocks, ice, and similar hard materials at and immediately below the surface of the ground is undergoing development. The system, denoted a sample...
Briefs: Mechanical & Fluid Systems
An improved process for making nanocrystallites, commonly denoted quantum dots (QDs), is based on spray pyrolysis. Unlike the process used heretofore, the improved process is amenable to mass production...
Briefs: Manufacturing & Prototyping
An improved method has been devised for fabricating micron-dimension Li features. This approach is intended for application in the fabrication of lithium-based microelectrochemical...
Briefs: Manufacturing & Prototyping
Manufacture of Regularly Shaped Sol-Gel Pellets
An extrusion batch process for manufacturing regularly shaped sol-gel pellets has been devised as an improved alternative to a spray process that yields irregularly shaped pellets. The aspect ratio of regularly shaped pellets can be controlled more easily, while regularly shaped pellets pack more...
Briefs: Information Technology
An algorithm that effects fast lossless compression of multispectral-image data is based on low-complexity, proven adaptive filtering algorithms. This algorithm is intended for use in...
Briefs: Information Technology
Improved Solar-Radiation-Pressure Models for GPS Satellites
A report describes a series of computational models conceived as an improvement over prior models for determining effects of solar-radiation pressure on orbits of Global Positioning System (GPS) satellites. These models are based on fitting coefficients of Fourier functions of...
Application Briefs: Sensors/Data Acquisition
Charge coupled device (CCD) image sensors e2v Technologies Elmsford, NY 914-593-6841 www.e2v.com
Briefs: Information Technology
Algorithms for Maneuvering Spacecraft Around Small Bodies
A document describes mathematical derivations and applications of autonomous guidance algorithms for maneuvering spacecraft in the vicinities of small astronomical bodies like comets or asteroids. These algorithms compute fuel- or energy-optimal trajectories for typical maneuvers by solving...
Application Briefs: Electronics & Computers
Linux Supersystem supercomputers Linux Networx Bluffdale, UT 877-505-5694 www.linuxnetworx.com
Briefs: Information Technology
Practical Simulator Network (PSimNet) is a set of data communication protocols designed especially for use in handling messages between computers that are engaging cooperatively in...
Briefs: Information Technology
Statistical Detection of Atypical Aircraft Flights
A computational method and software to implement the method have been developed to sift through vast quantities of digital flight data to alert human analysts to aircraft flights that are statistically atypical in ways that signify that safety may be adversely affected. On a typical day, there are...
Briefs: Information Technology
An automated system to assist a General Aviation (GA) pilot in improving situational awareness of weather in flight is now undergoing development. This development is prompted by the observation...
Briefs: Information Technology
The Aviation Safety Monitoring and Modeling (ASMM) Project of NASA’s Aviation Safety program is cultivating sources of data and developing automated computer hardware and software to facilitate...
Briefs: Materials
A process for fabricating thermoelectric modules with vacuum gaps separating the thermoelectric legs has been conceived, and the feasibility of some essential parts of the process has...
Briefs: Physical Sciences
The cryospheric advanced sensor (CAS) is a developmental airborne (and, potentially, spaceborne) radar based instrumentation system for measuring and mapping the thickness of sea ice. A...
Briefs: Physical Sciences
Measuring Attitude of a Large, Flexible, Orbiting Structure
A document summarizes a proposed metrology subsystem for precisely measuring the attitude of a large and flexible structure in space.
Products
NMeasurement Computing, Norton, MA, has released the USB-3101 analog data output device that is fully compatible with USB 1.1 and 2.0 ports. The full-speed device is supported under Microsoft(r) Windows(r)...
Briefs: Physical Sciences
A proposed remote-sensing instrument, to be carried aboard a spacecraft in orbit around the Earth, would gather data on the spatial distribution and radiative characteristics of...
Briefs: Physical Sciences
Multimode-Guided-Wave Ultrasonic Scanning of Materials
Two documents discuss a method of characterizing advanced composite materials by use of multimode-guided ultrasonic waves. The method at an earlier stage of development was described in “High-Performance Scanning Acousto-Ultrasonic System” (LEW-17601-1), NASA Tech Briefs, Vol. 30, No. 3...
Briefs: Physical Sciences
The device illustrated in Figure 1 is designed primarily for use as a regenerative heat exchanger in a miniature Stirling engine or Stirling-cycle heat pump. A regenerative heat exchanger (sometimes...
Briefs: Physical Sciences
Accelerometers used for shock and vibration measurement in extreme environments require special consideration in the design and manufacturing process. Certain...
Briefs: Semiconductors & ICs
A three-stage monolithic microwave integrated circuit (MMIC) W-band amplifier has been constructed and tested in a continuing effort to develop amplifiers as well as oscillators, frequency...
Briefs: Semiconductors & ICs
A proposed improved method of externally controlled time multiplexing of the readouts of focal plane arrays of pairs of stacked quantum well infrared photodetectors (QWIPs) that...
Briefs: Software
Implementing Access to Data Distributed on Many Processors
A reference architecture is defined for an object-oriented implementation of domains, arrays, and distributions written in the programming language Chapel.
Briefs: Software
2D/3D Visual Tracker for Rover Mast
A visual-tracker computer program controls an articulated mast on a Mars rover to keep a designated feature (a target) in view while the rover drives toward the target, avoiding obstacles.
Several prior visual tracker programs have been tested on rover platforms; most require very small and well-estimated motion...
Articles: Motion Control
Direct Torque Control (DTC) is widely used as a method for controlling AC motors in many demanding applications. It is a unique method for controlling AC motors. In...
Briefs: Software
Measurement and Controls Data Acquisition System
Measurement and Controls Data Acquisition System (MCDAS) is an application program that integrates the functions of two stand-alone programs: one for acquisition of data, the other for controls.
Application Briefs: Robotics, Automation & Control
Haptics, also known as “force feedback teleoperation,” attempts to provide environmental interactions through a robotic system. Users mimic these interactions with robotic arms. By...
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Webcasts
Upcoming Webinars: Test & Measurement
From Spreadsheets to Insights: Fast Data Analysis Without Complex...
Upcoming Webinars: Electronics & Computers
Cooling a New Generation of Aerospace and Defense Embedded...
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Beyond AI-Copy-Paste Engineering: Advanced AI-Integration Success...
Upcoming Webinars: Automotive
Battery Abuse Testing: Pushing to Failure
Upcoming Webinars: Internet of Things
A FREE Two-Day Event Dedicated to Connected Mobility
Upcoming Webinars: Test & Measurement
Choosing the Right N-Port Strategy: Multiport VNAs vs. Switch...