Blog
Technology Business Briefs
Methodology for Providing Secure Time Stamps or Signals for Documents and Other Computer Files

The secure time stamps include an externally generated time signal.

More information here.

Blog
Monitoring Darfur

Amnesty International USA is using powerful satellite cameras to monitor highly vulnerable villages in war-torn Darfur -- the first-ever technological capability by human rights defenders to track possible targets of attack, prevent new atrocities, and save lives.

Unlike other online projects which only document previous...

Blog
Climate Modeling

A new Web-enhanced version of the most commonly used climate modeling system, TeraGrid, will allow many more scientists to test theories about the Earth's climate. Called the Community Climate System Model (CCSM), the new version is actually a collection of interconnected modeling systems. CCSM contains separate climate models...

Blog
Current Attractions

ALGOR V20 from ALGOR, Inc. (Pittsburgh, PA) has been named NTB's Product of the Month for June. An integrated CAD/finite element analysis (FEA) modeling environment for working with imported CAD models or building original models, the new release features design scenarios that let a single FEA model contain numerous analyses;...

Blog
Tech Needs of the Week

A cost-efficient anti-graffiti coating solution is needed for application to flexible PVC film. The coating should add a flexible transparent layer with specific properties: scratch & UV resistant, stable physical behavior between -30 degrees and 90 degrees Celsius, and resistant to solvents and alcohols used for...

Blog
NASA News

On June 5, NASA's MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft flew past Venus just 338 km above the planet's surface and shot a laser into the clouds. Although MESSENGER is on a mission to Mercury, the spacecraft must pass by Venus for a gravity assist en route. In passing, researchers hope to...

INSIDER: Electronics & Computers
SMP vs. AMP: How Homogenous Is Your Embedded System?

Multiprocessing system architectures come in all shapes and sizes, so it is dangerous to make any generalizations. But perhaps there's agreement that most systems can be classified as either symmetric multiprocessing (SMP) or asymmetric multiprocessing (AMP).

INSIDER: Electronics & Computers
Secure Partitioning Safeguards Real-time Performance

High performance multi-core processors are providing opportunities to consolidate multiple applications into a single system. However, embedded applications often have real-time requirements that cannot be put in jeopardy by other software clamoring for the same system resources such as CPU...

INSIDER: Electronics & Computers

Multi-core processing is a "disruptive technology", transforming the way embedded systems are architected, developed, and debugged. With greatly improved performance and lower power, multi-core...

Blog
Navy Remote Sensing

A partnership between NASA and the U.S. Naval Academy is offering students the chance to build a satellite called "MidSTAR-2" through a U.S. Department of Defense program that will carry four experiments into space in 2011 to look at different parts of Earth's atmosphere, gamma rays, and solar winds. Scientists at NASA's...

Blog
Sensor Spinoff

Beneath the waves near Key Largo, FL, an underwater lab called Aquarius provides a safe harbor for scientists to live and work for weeks at a time. For NASA, Aquarius provides an environment that is analogous to the International Space Station (ISS) and the space shuttle. To maintain Aquarius, NASA recruited Invocon of Conroe, TX,...

Blog
Technologies of the Week

The Magtorque sensor provides a simple, low-cost means to monitor torque on rotating elements. It uses a small and magnetoelastic sensor attached to the shaft that is monitored remotely via an inductive pickup. It provides sensitive and repeatable measurements of applied torque without direct physical contact.

...

Blog
Cell Phone Sensors

The Department of Homeland Security (DHS) is researching the use of cell phones equipped with sensors that could detect biological agents such as anthrax, as well as radioactive isotopes and toxic chemicals. Since fixed sensors can't be placed everywhere, the solution could soon be in everyone's hands.

Gentag, a...

Blog
Current Attractions

This monthly review lets you "meet" the new advertisers appearing in Defense Tech Briefs (DTB). Here's a sneak peek at the products, services, and offers available from June's first-time advertisers.

Alpha Security Group is a publicly traded company that seeks to acquire a homeland security or defense business. Contact...

Blog
Technology Business Brief

This modulator was developed to provide circuitry and apparatus that create specialized optical signals suitable for use as a digital photonic clock, a pulse amplitude modulator, and a bi-stable optical memory cell.

More information here.

Blog
Green Bricks

Researchers from Freight Pipeline Company (FPC) taking part in a National Science Foundation (NSF)-sponsored project have found that bricks made from fly ash -- fine ash particles captured as waste by coal-fired power plants -- may be even safer than predicted. Instead of leaching minute amounts of mercury as earlier predicted, the...

Products

ALGOR, Inc., Pittsburgh, PA, has released ALGOR V20, an integrated CAD/finite element analysis (FEA) modeling environment for working with imported CAD models or building original...

Application Briefs: Electronics & Computers
HANABI HVS-3800HS Multi-Bit Rate Switcher
FOR-A
Waltham, MA
714-867-3311
www.for-a.com

NASA’s Goddard Space Flight Center (GSFC) in Greenbelt, MD,...

Application Briefs: Imaging
Isilon IQ Clustered Storage System
Isilon Systems
Seattle, WA
206-315-7500
www.isilon.com

NASA World Wind is an open-source, virtual globe...

Articles: Sensors/Data Acquisition

A team from Langley Research Center in Hampton, VA, has been awarded the 2006 NASA Government Invention of the Year for an actuator and sensor system that is more durable than a piezoelectric system,...

Articles: Sensors/Data Acquisition

Modern digital technology and a little imagination have led to today’s most popular devices, like the MP3 player — a tiny digital music player that you can carry in your shirt pocket,...

Articles: Manufacturing & Prototyping

The 2006 NASA Tech Briefs (NTB) and Photonics Tech Briefs (PTB) Readers’ Choice Product of the Year Awards were presented recently by the editors of NTB and PTB at an awards dinner...

Articles: Software
By Steve Luby
President & Chief Executive Officer
VISTAGY, Inc.
Waltham, MA

Today, every company is searching for a sustainable competitive advantage, and getting great...

Briefs: Electronics & Computers
High-Accuracy, High-Dynamic-Range Phase-Measurement System

A digital phase meter has been designed to satisfy stringent requirements for measuring differences between phases of radiofrequency (RF) subcarrier signals modulated onto laser beams involved in the operation of a planned space-borne gravitational- wave-detecting heterodyne laser...

Briefs: Electronics & Computers
Multi-Antenna Radar Systems for Doppler Rain Measurements

Use of multiple-antenna radar systems aboard moving high-altitude platforms has been proposed for measuring rainfall. The platforms contemplated in the proposal would be primarily spacecraft, but, in principle, the proposal could also apply to aircraft. The problem of measuring rainfall...

Briefs: Mechanical & Fluid Systems

An apparatus has been designed and built for testing the effects, on moderatesized objects, of cushioned decelerations having magnitudes ranging up to several hundred g [where g = normal Earth...

Briefs: Test & Measurement

A compact, high-dynamic-range, electronically tunable vector measurement system that operates in the frequency range from ≈560 to ≈635 GHz has been developed as a prototype of...

Briefs: Electronics & Computers

A modular architecture has been conceived for the design of radiation-monitoring instruments used aboard spacecraft and in planetary-exploration settings. This architecture reflects...

Briefs: Electronics & Computers
Smart Data Node in the Sky

A document discusses the physical and engineering principles affecting the design of the Smart Data Node in the Sky (SDNITS) — a proposed Earthorbiting satellite for relaying scientific data from other Earth-orbiting satellites to one or more ground station(s). The basic concept of the SDNITS is similar to that of...

Trending Stories

Briefs: Mechanical & Fluid Systems

Finned Carbon-Carbon Heat Pipe With Potassium Working Fluid

Articles: Manufacturing & Prototyping

What Does Resolution Mean in 3D Printing?

NASA Spinoff: Materials

Nanotechnology Repairs Engine Damage in Cars

Technology Leaders: Energy

Supercapacitors Go Hybrid for Increased Performance and Efficiency

Briefs: Sensors/Data Acquisition

Gas Biosensors “See” Through Soil to Analyze Microbial Interactions

NASA Spinoff: Manufacturing & Prototyping

Conducting the Heat

Videos