Briefs: Materials
Wire-Mesh-Based Sorber for Removing Contaminants From Air

A paper discusses an experimental regenerable sorber for removing CO2 and trace components — principally, volatile organic compounds, halocarbons, and NH3 — from spacecraft cabin air. This regenerable sorber is a prototype of what is intended to be a lightweight...

A technique for real-time estimation of stability and control derivatives (derivatives of moment coefficients with respect to control-surface deflection angles) was used to support a...

Briefs: Mechanical & Fluid Systems
Excitations for Rapidly Estimating Flight-Control

A flight test on an F-15 airplane was performed to evaluate the utility of prescribed simultaneous independent surface excitations (PreSISE) for real-time estimation of flight-control...

A tool makes it possible to couple a torque wrench to an externally knurled, internally threaded, round cable connector. The purpose served by the tool is to facilitate the...

Briefs: Mechanical & Fluid Systems
Controlling Attitude of a Solar-Sail Spacecraft Using Vanes
A paper discusses a concept for controlling the attitude and thrust vector of a three-axis stabilized Solar Sail spacecraft using only four single degree of freedom articulated spar-tip vanes. The vanes, at the corners of the sail, would be turned to commanded angles about the diagonals of...
Briefs: Physical Sciences
Sensors for Using Times of Flight To Measure Flow Velocities

Thin-film sensors for measuring flow velocities in terms of times of flight are undergoing development. These sensors are very small and can be mounted flush with surfaces of airfoils, ducts, and other objects along which one might need to measure flows. Alternatively or in addition,...

Briefs: Physical Sciences
Using Satellite Data in Weather Forecasting: I

The GOES Product Generation System (GPGS) is a set of computer codes and scripts that enable the assimilation of real-time Geostationary Operational Environmental Satellite (GOES) data into regional weather forecasting mathematical models. The GPGS can be used to derive such geophysical parameters...

A family of proposed miniature sources of power would exploit the direct conversion of the kinetic energy of a particles into electricity. In addition to having long operational...

Briefs: Physical Sciences
Ice-Borehole Probe

An instrumentation system has been developed for studying interactions between a glacier or ice sheet and the underlying rock and/or soil. Prior borehole imaging systems have been used in well-drilling and...

Whispering-gallery-mode (WGM) optical resonators can be designed to exhibit continuous spectra over wide wavelength bands (in effect, white-light spectra), with ultrahigh values of the...

Briefs: Semiconductors & ICs
Carbon-Nanotube Schottky Diodes

Schottky diodes based on semiconducting single-walled carbon nanotubes are being developed as essential components of the next generation of submillimeter-wave sensors and sources. Initial performance predictions have shown that the performance characteristics of these devices can exceed those of the...

Briefs: Software
Coordinating an Autonomous Earth- Observing Sensorweb
A system of software has been developed to coordinate the operation of an autonomous Earth-observing sensorweb. Sensorwebs are collections of sensor units scattered over large regions to gather data on spatial and temporal patterns of physical, chemical, or biological phenomena in those regions....
Briefs: Software
Using Dissimilarity Metrics to Identify Interesting Designs
A computer program helps to blend the power of automated-search software, which is able to generate large numbers of design solutions, with the insight of expert designers, who are able to identify preferred designs but do not have time to examine all the solutions. From among the many...
Briefs: Software
X-Windows PVT Widget Class

The X-Windows Process Validation Table (PVT) Widget Class ("Class" is used here in the object oriented programming sense of the word) was devised to simplify the task of implementing network registration services for Information Sharing Protocol (ISP) graphical user interface (GUI) computer programs. Heretofore, ISP...

Briefs: Software
Shuttle Data Center File- Processing Tool in Java

A Java-language computer program has been written to facilitate mining of data in files in the Shuttle Data Center (SDC) archives. This program can be executed on a variety of workstations or via Web-browser programs. This program is partly similar to prior C-language programs used for the same...

Briefs: Software
Statistical Evaluation of Utilization of the ISS

PayLoad Utilization Modeler (PLUM) is a statistical-modeling computer program used to evaluate the effectiveness of utilization of the International Space Station (ISS) in terms of the number of research facilities that can be operated within a specified interval of time. PLUM is designed to...

Articles: Electronics & Computers
30 Years of Electronics & Semiconductors

In celebration of the 30th Anniversary of NASA Tech Briefs, our features in 2006 highlight a different technology category each month, tracing the past 30 years of the technology, and continuing with a glimpse into the future of where the technology is headed. Along the way, we include insights from...

Articles
How Much Financing Does Your Growing Company Need?

How much money will your growing company need? The answer is, you want enough investment to grow the company to its potential, yet do not want to over-fund, giving up too much equity. You cannot raise funds without a reasonable estimate of what you need.

The multipurpose, multiaxial, isokinetic dynamometer (MMID) is a computer-controlled system of exercise machinery that can serve as a means for quantitatively assessing a...

Products
NEiNastran V9

Noran Engineering, Westminster, CA, has released NEiNastran V9 finite element analysis (FEA) software for engineering analysis and simulation. Performance enhancements include added support for model input files over 10 million...

At remote sites, the International Space Station, or missions to the Moon or Mars, illness and injury can be extremely serious. Far from hospitals, scientists and astronauts may find...

Cold Gas Micro Thruster (CGMT)
Marotta Controls
Montville, NJ
973-334-7800
www.marotta.com

Satellite Tool Kit (STK) data analysis software
Analytical Graphics (AGI)
Exton, PA
610-981-8000
www.agi.com

Philips

Historically, high-energy (Joule-class) nanosecond YAG lasers have been confined primarily to laboratory research facilities and government labs. System designs were unique for...

Features: Photonics/Optics
DFM Your Device? Simulation Is the Answer

Design for Manufacturing (DFM) has taken off like a rocket in the electronics industry in recent years. Performing process and device simulations on CMOS transistors in a DFM flow have proven to be...

It is widely known that the light emitting diode (LED) R&D and commercialization community is striving to produce higher power, bright-white-light LEDs. From both a temperature and...

Briefs: Photonics/Optics
Simplified Optics and Controls for Laser Communications

A document discusses an architecture of a spaceborne laser communication system that provides for a simplified control subsystem that stabilizes the line of sight in a desired direction. Heretofore, a typical design for a spaceborne laser communication system has called for a high-bandwidth...

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