Special Coverage

Lightweight, Flexible Thermal Protection System for Fire Protection
High-Precision Electric Gate for Time-of-Flight Ion Mass Spectrometers
Polyimide Wire Insulation Repair System
Distributed Propulsion Concepts and Superparamagnetic Energy Harvesting Hummingbird Engine
Aerofoam
Wet Active Chevron Nozzle for Controllable Jet Noise Reduction
Magnetic Relief Valve
Active Aircraft Pylon Noise Control System
Unmanned Aerial Systems Traffic Management
Home

Biomass Becomes Ethanol



Posted in: Blog

Read More >>

NASA Briefs

"Generic Spacecraft" is a library of software developed by NASA's Jet Propulsion Laboratory (JPL) that provides for simulation of a generic spacecraft that can orbit the Earth and land on the Moon (and, eventually, on Mars). The generic-spacecraft simulation serves as a test bed for modeling spacecraft dynamics, propulsion, control systems, guidance, and displays. Click here for more info.

Posted in: Blog

Read More >>

Genome Software



Posted in: Blog

Read More >>

Alzheimer's Risks



Posted in: Blog

Read More >>

Sensing Homemade Bombs



Posted in: Blog

Read More >>

Gas Sensors Based on Coated and Doped Carbon Nanotubes

Large specific surface areas of nanotubes could enable attainment of high sensitivities. Efforts are underway to develop inexpensive, low-power electronic sensors, based on single-walled carbon nanotubes (SWCNTs), for measuring part-per-million and part-per-billion of selected gases (small molecules) at room temperature. Chemically unmodified SWCNTs are mostly unresponsive to typical gases that one might wish to detect. However, the electrical resistances of SWCNTs can be made to vary with concentrations of gases of interest by coating or doping the SWCNTs with suitable materials. Accordingly, the basic idea of the present development efforts is to incorporate thus-treated SWCNTs into electronic devices that measure their electrical resistances.

Posted in: Briefs, Materials

Read More >>

Thin-Film Magnetic-Field-Response Fluid-Level Sensor for Non-Viscous Fluids

This sensor would be inexpensive and easy to fabricate. An innovative method has been developed for acquiring fluid-level measurements. This method eliminates the need for the fluid-level sensor to have a physical connection to a power source or to data acquisition equipment. The complete system consists of a lightweight, thin-film magnetic-field-response fluid-level sensor (see Figure 1) and a magnetic field response recorder that was described in “Magnetic-Field-Response Measurement-Acquisition System” (LAR-16908-1), NASA Tech Briefs, Vol. 30, No. 6 (June 2006), page 28.

Posted in: Briefs, Physical Sciences

Read More >>

The U.S. Government does not endorse any commercial product, process, or activity identified on this web site.