Keyword: Gases

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Briefs: Photonics/Optics

A transfer technique based on thin sacrificial layers of boron nitride could allow high-performance gallium nitride gas sensors to be grown on sapphire substrates and then...

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Briefs: Mechanical & Fluid Systems
Novel Vent Design Features Variable Flow Control and Rain Protection

NASA’s Marshall Space Flight Center scientists have designed a vent that can be useful for purging closed compartments, while preventing backflow and foreign object entry. The technology uses a system of configurable devices to provide variable flow control and prevent water,...

Briefs: Mechanical & Fluid Systems

NASA's Marshall Space Flight Center (MSFC) developed a foam-rigidized, inflatable, tubular space boom that can be transported, deployed, and inflated at remote locations. The lightweight...

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Briefs: Mechanical & Fluid Systems
Plasma-Assisted Catalytic Reverse Water Gas Shift Reactor

For improving CO2 conversions for a low-temperature CO2 methanation process, a mechanism of using reverse water gas shift (RWGS) reaction as an intermediate step to generate the more reactive CO species for the methanation process was developed. The challenge was to...

Briefs: Sensors/Data Acquisition
Gas Sensing System Employing Raman Scattering

The detection and characterization of molecular gases in a sample is a relatively difficult challenge. Usually, this task is relegated to expensive and time-consuming processes like mass spectrometry and gas chromatography. Furthermore, numerous industrial applications require such gas-phase analysis...

Briefs: Sensors/Data Acquisition

Gas sensors are usually engineered to detect a specific molecule in one of many potential categories: toxic gases, combustible gases, and VOCs. A number of technologies, such as infrared,...

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Briefs: Sensors/Data Acquisition

Induced seismicity is earthquake activity that occurs because of changes in subsurface stress brought about by human activity. Using geology,...

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Briefs: Test & Measurement
Overspeed Protection for Turbine Flowmeters in Cryogenic Applications

Flowmeters for cryogenic applications often fail in service. Turbine flowmeters in particular fail due to very high speeds encountered during chill-down operations. Very cold, very high-velocity gas causes the turbine to spin uncontrollably, which quickly degrades bearings....

Briefs: Test & Measurement

An arson investigation typically requires collecting one or two liters of ashes and debris from various locations within a fire scene in metal cans similar to those used for paint, and...

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Briefs: Nanotechnology
Carbon Nanotube Purification

Development of carbon nanotubes (CNTs), including single-wall and multi-wall nanotubes and nanofibers, into useful devices requires fabrication of CNTs that are relatively free from process residues such as amorphous carbon and metallic particles that are not part of a CNT array grown on a (coated) substrate....

Briefs: Mechanical & Fluid Systems

Asealing device was developed that acts as a high-temperature shutoff valve for pipes and ducts. The device is an annular ring that can be slipped over the outside of the pipe (or built into a flanged...

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Briefs: Materials

Solar fuels are created using only sunlight, water, and carbon dioxide (CO2). Researchers are exploring a range of target fuels, from hydrogen gas to liquid hydrocarbons, but...

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Briefs: Manufacturing & Prototyping
Method of Manufacturing Convective Accelerometers

Miniaturization and integration of accelerometers in standard integrated circuit (IC) processes has been the topic of extensive research. In most cases, accelerometer structures involve a solid proof mass that is allowed to move under accelerating conditions. This approach has many disadvantages....

Briefs: Mechanical & Fluid Systems

Fluorocarbon-based fire extinguishing agents are environmentally harmful since they cause depletion of the Earth's ozone layer. Fine Water Mist (FWM)-type systems have very favorable characteristics as...

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Articles: Electronics & Computers

This column presents technologies that have applications in commercial areas, possibly creating the products of tomorrow. To learn more about each technology, see the contact information provided for that innovation.

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Briefs: Materials

Surfaces such as metal and other corrodible surfaces are often exposed to extreme weathering, temperatures, moisture, impurities, and otherwise damaging external forces that accelerate corrosion....

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Briefs: Materials

NASA's Langley Research Center has developed a new class of polyimide composite electrical insulation materials for wires, cable, and bus pipe. These new insulation materials have been shown to withstand a...

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Briefs: Materials

To comply with the Restriction of Hazardous Substances (RoHS) directive, pure tin is replacing lead-tin alloys in commercial electronic devices. Unfortunately, tin can grow...

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Briefs: Manufacturing & Prototyping
Functionalization of Carbon Nanotubes

Carbon nanotubes (CNTs) have attracted much attention due to their extraordinary mechanical and unique electronic properties. CNTs are being studied for applications in high-strength/low-weight composites and other applications. In order to alter the CNT properties for particular applications, chemical...

Briefs: Materials

An alternate heat shield concept for the Orion space vehicle is to use interlocking blocks of Phenolic Impregnated Carbon Ablator (PICA). The blocks are independent from...

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Briefs: Test & Measurement

NASA’s Glenn Research Center has developed and patented the Compact Full-Field Ion Detector System (CFIDS), a radiation particle detection system that provides information on the kinetic...

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Briefs: Mechanical & Fluid Systems
Compact, Lightweight Trap Vent

This compact, lightweight trap vent is used to minimize the pressure differential of a high-altitude, balloon-borne detector. The vent allows the pressure to equalize rapidly, yet does not allow any light to enter the detector.

Briefs: Electronics & Computers

Tufts University engineers have invented a chip-sized, high-speed modulator that operates at terahertz (THz) frequencies at room temperature and at low voltages without consuming DC...

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Who's Who: Sensors/Data Acquisition

Using data from NASA’s Earth Observing System Aura satellite, launched in 2004, a team led by Michigan Technological University created a global map of...

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Briefs: Sensors/Data Acquisition

Part of the TDK group of companies, Headway Technologies (Milpitas, CA) is a semiconductor manufacturer of memory and drive head technologies, and designs and manufactures recording...

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Briefs: Sensors/Data Acquisition

NASA's Langley Research Center has developed a photo-acoustic sensing-based laser vibrometer for the measurement of ambient chemical species. The technology allows for detection of sub-part-per-billion (ppb)...

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Briefs: Mechanical & Fluid Systems

Oxygen, water, and fuel are of paramount importance to human life. As a leading concept, the solid-oxide electrolysis cell (SOEC) is a very powerful technology, especially...

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Briefs: Sensors/Data Acquisition

NASA's Langley Research Center has developed a Floating Ultrasonic System for improved nondestructive testing. Most ultrasonic scanners require an...

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Briefs: Manufacturing & Prototyping

Electron Beam Freeform Fabrication, or EBF3, is a process that uses an electron beam gun, a dual wire feed, and computer controls to manufacture metallic structures for building parts or tools in hours,...

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