Keyword: Technical review

Briefs: Information Technology
Reducing the Volume of NASA Earth-Science Data

A computer program reduces data generated by NASA Earth-science missions into representative clusters characterized by centroids and membership information, thereby reducing the large volume of data to a level more amenable to analysis. The program effects an autonomous data-reduction/clustering...

Briefs: Information Technology
Reporting Differences Between Spacecraft Sequence Files

A suite of computer programs, called “seq diff suite,” reports differences between the products of other computer programs involved in the generation of sequences of commands for spacecraft. These products consist of files of several types: replacement sequence of events (RSOE), DSN...

Briefs: Information Technology
Algorithm for Stabilizing a POD-Based Dynamical System

This algorithm provides a new way to improve the accuracy and asymptotic behavior of a low-dimensional system based on the proper orthogonal decomposition (POD). Given a data set representing the evolution of a system of partial differential equations (PDEs), such as the Navier-Stokes...

Briefs: Information Technology
Parameterizing Coefficients of a POD-Based Dynamical System

A method of parameterizing the coefficients of a dynamical system based of a proper orthogonal decomposition (POD) representing the flow dynamics of a viscous fluid has been introduced. (A brief description of POD is presented in the immediately preceding article.) The present...

Briefs: Physical Sciences
Turbulence and the Stabilization Principle

Further results of research, reported in several previous NASA Tech Briefs articles, were obtained on a mathematical formalism for postinstability motions of a dynamical system characterized by exponential divergences of trajectories leading to chaos (including turbulence).

Briefs: Physical Sciences

An improved mathematical model has been developed of the time dependence of buildup or decay of electric charge in a high-resistivity (nominally insulating) material. The model is...

Briefs: Information Technology
Thermal Transport Model for Heat Sink Design

A document discusses the development of a finite element model for describing thermal transport through microcalorimeter arrays in order to assist in heat-sinking design. A fabricated multiabsorber transition edge sensor (PoST) was designed in order to reduce device wiring density by a factor of...

Briefs: Electronics & Computers

Electrically variable or programmable capacitors based on the unique properties of thin perovskite films are undergoing development. These capacitors show promise of overcoming two...

Briefs: Information Technology

A method of constructing certain low-density parity-check (LDPC) codes by use of relatively simple loop-free coding modules has been developed. The subclasses of LDPC codes to which the...

Briefs: Information Technology
Extending Newtonian Dynamics to Include Stochastic Processes

A paper presents further results of continuing research reported in several previous NASA Tech Briefs articles, the two most recent being “Stochastic Representations of Chaos Using Terminal Attractors” (NPO-41519), [Vol. 30, No. 5 (May 2006), page 57] and “Physical Principle for...

Application Briefs: Electronics & Computers

With more embedded systems using SSDs in critical applications, designers are now asking the question, “How long will this SSD last in my application?” To help answer this...

Briefs: Software
Alert Notification System Router

The Alert Notification System Router (ANSR) software provides satellite operators with notifications of key events through pagers, cell phones, and e-mail. Written in Java, this application is specifically designed to meet the mission-critical standards for mission operations while operating on a variety of...

Briefs: Information Technology

An application-layer protocol and a network architecture have been proposed for data communications among multiple autonomous spacecraft that are required to fly in a precise...

Briefs: Information Technology
Complexity for Survival of Living Systems

A logical connection between the survivability of living systems and the complexity of their behavior (equivalently, mental complexity) has been established. This connection is an important intermediate result of continuing research on mathematical models that could constitute a unified representation of...

Application Briefs: Electronics & Computers

A lot has been written about Moore's Law and the potential limitations of semiconductor design and manufacturing in the future. Can we really continue to double the...

Articles: Imaging

High-performance computing (HPC) has transformed science and engineering over the past 20 years, but some fields have yet to fully realize its benefits due to software limitations. This...

Application Briefs: Electronics & Computers
SGI® Altix® ICE system
Silicon Graphics, Inc. (SGI)
Sunnyvale, CA
800-800-7441
www.sgi.com

SGI has supplied NASA's Advanced Supercomputing facility at NASA Ames...

Briefs: Mechanical & Fluid Systems

The B-pillar is an important load-carrying component of any automobile body. It is a primary support structure for the roof, and is typically a thin-walled, spot-welded, closed-section...

Briefs: Information Technology
Integrated System Health Management Development Toolkit

This software toolkit is designed to model complex systems for the implementation of embedded Integrated System Health Management (ISHM) capability, which focuses on determining the condition (health) of every element in a complex system (detect anomalies, diagnose causes, and predict...

Application Briefs: Imaging
AgileMesh/Firetide surveillance system
AgileMesh
Dallas, TX
972-231-2122
www.agilemesh.com

NASA Dryden Flight Research Center now protects several of its highly...

Briefs: Information Technology
Sequence History Update Tool

The Sequence History Update Tool performs Web-based sequence statistics archiving for Mars Reconnaissance Orbiter (MRO). Using a single UNIX command, the software takes advantage of sequencing conventions to automatically extract the needed statistics from multiple files. This information is then used to populate a...

Articles: Software

In our annual poll of executives at leading analysis and simulation software companies, we posed questions dealing with virtual prototyping, multiphysics, the roles of the designer and analyst,...

Articles: Aerospace
NASA Celebrates 50 Years

"The exploration of space will go ahead, whether we join it or not, and it is one of the greatest adventures of all time, and no nation which expects to be the leader of other nations can expect to stay behind in this race for space. "We set sail on this new sea because there is new knowledge to be gained and new rights...

Articles: Aerospace
50 Years of Inspiration

We wanted NASA Tech Briefs readers to be a part of our special issue celebrating NASA's 50th anniversary. So, we asked you to tell us how NASA, and NASA Tech Briefs, have inspired you over the past 50 years. We wanted to know how NASA helped you in your career or business, or improved your everyday life. What benefits...

Briefs: Information Technology
Root Source Analysis/ValuStream™ — a Methodology for Identifying and Managing Risks

Root Source Analysis (RoSA) is a systems-engineering methodology that has been developed at NASA over the past five years. It is designed to reduce costs, schedule, and technical risks by systematically examining critical assumptions and the state of the...

Articles: Electronics & Computers
Interview with Ray Alderman, Executive Director of VITA

Founded in 1984 to promote VMEbus technology, VITA is a non-profit organization of more than 125 vendor companies who share a common interest in real-time, modular embedded computing systems. In August 2008, VITA's Executive Director, Ray Alderman, agreed to speak with Embedded Technology's...

Briefs: Software

MagBear12 is a computer code (see figure) that assists in the design of radial, heteropolar active magnetic bearings (AMBs). MagBear12 was developed to help in designing the...

Briefs: Software

The MRO OLVM wrapper script software allows Mars Reconnaissance Orbiter (MRO) sequence and spacecraft engineers to rapidly simulate a spacecraft command product through a tool that simulates the...

Briefs: Information Technology

A method of accelerating and facilitating production of video and film motion- picture products, and software and generic designs of computer hardware to implement the method, are...