Stories
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Briefs: Semiconductors & ICs
Closely following the development reported in the article, "Low-Noise MMIC Amplifiers for 120 to 180 GHz" (NPO-42783), three new monolithic microwave integrated circuit (MMIC)...
Briefs: Electronics & Computers
Some logic circuits have been built and demonstrated to work substantially as intended, all as part of a continuing effort to exploit the high degrees of design flexibility and functionality of the...
Briefs: Electronics & Computers
It is possible to synthesize a voltage-controlled negative-differential-resistance (NDR) device or circuit by use of a pair of complementary G4FETs (four-gate field-effect...
News: Energy
Georgia Tech researchers have developed a new ceramic material that could help expand the applications for solid oxide fuel cells – devices that generate electricity directly from a wide range of liquid...
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: Electronics & Computers
Vector modulators are used to impose baseband modulation on RF signals, but non- ideal behavior limits the overall performance. The non-ideal behavior of the vector modulator is compensated...
Briefs: Manufacturing & Prototyping
Two-Piece Screens for Decontaminating Granular Material
Two-piece screens have been designed specifically for use in filtering a granular material to remove contaminant particles that are significantly wider or longer than are the desired granules. In the original application for which the two-piece screens were conceived, the granular material is...
Briefs: Materials
Rectangular-waveguide inserts that are made of non-ferromagnetic metals and are sized and shaped to function as notch filters have been conceived as reference standards for use in the...
Briefs: Information Technology
Integrated Risk and Knowledge Management Program — IRKM-P
The NASA Exploration Systems Mission Directorate (ESMD) IRKM-P tightly couples risk management and knowledge management processes and tools to produce an effective “modern” work environment. IRKM-P objectives include: (1) to learn lessons from past and current programs (Apollo, Space...
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
Low-density parity-check (LDPC) codes characterized by minimum Hamming distances proportional to block sizes have been demonstrated. Like the codes mentioned in the immediately...
Briefs: Electronics & Computers
MMICs With Radial Probe Transitions to Waveguides
A document presents an update on the innovation reported in “Integrated Radial Probe Transition From MMIC to Waveguide” (NPO-43957), NASA Tech Briefs Vol. 31, No. 5 (May 2007), page 38. To recapitulate: To enable operation or testing of a monolithic microwave integrated circuit (MMIC), it is...
Briefs: Electronics & Computers
Tests of Low-Noise MMIC Amplifier Module at 290 to 340 GHz
A document presents data from tests of a low-noise amplifier module operating in the frequency range from 290 to 340 GHz — said to be the highest-frequency low-noise, solid-state amplifier ever developed. The module comprised a three-stage monolithic microwave integrated circuit (MMIC)...
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...
Who's Who: Communications
Gary Martin began his career with NASA in the Microgravity Sciences and Applications Division in 1990 where he served as Branch Chief for...
Products: Energy
SunMizerTM from Xandex Solar (Petaluma, CA) is a new per-panel DC-to-DC power optimizer that increases solar energy harvest by recovering power that is lost when shade falls on a panel. SunMizer can be installed...
News: Energy
MIT scientists have found that carbon nanotubes could be formed into tiny springs capable of storing as much energy, pound for pound, as the best lithium-ion batteries - potentially more durably and...
Videos: Energy
Lithium-ion batteries for advanced vehicles still have issues of safety and costs in terms of materials resources and abundances, synthesis, and recycling processes. Jean-Marie Tarascon, a professor at...
Products: Green Design & Manufacturing
Concentrated solar power (CSP) and concentrated photovoltaic (CPV) methodologies generate electricity by focusing a large amount of sunlight onto a much smaller area. To...
News: Energy
Blooms of Cladophora algae may be troublesome, but they do have a positive side. Researchers at the Ångström Laboratory of Sweden's Uppsala University have discovered that the cellulose...
Products: Energy
Signal Conditioners Ideal for Wind Turbines
The SCM5B, SCM7B, and SensorLex® 8B signal conditioning modules from Dataforth (Tucson, AZ) are all fully encapsulated, making them corrosion-resistant and well suited for use in rugged environments like wind turbines.
News: Energy
Hydrogen Storage Competition
DOE has launched the H-Prize competition, offering a $1 million award to an individual or team that creates the most advanced materials for hydrogen storage in vehicles.
Products: Energy
The AEGIS WTG™ grounding ring from Electro Static Technology (Mechanic Falls, ME) channels harmful shaft currents away from bearings to ground - preventing bearing damage that could cause wind turbine generator...
News: Energy
Last year, MIT researchers found that plants generate a voltage of up to 200 millivolts when one electrode is placed in a plant and the other in the surrounding soil. A University of Washington team followed...
News: Energy
Researchers at Israel's Ben-Gurion University of the Negev have developed thin films that exhibit carrier multiplication (CM) - a development that is of great interest for future solar cells.
News: Green Design & Manufacturing
Los Alamos National Laboratory and University of Alabama researchers have come up with a new method for recycling hydrogen-containing fuel materials, which could open the door to...
Techs for License: Electronics & Computers
Microscale Atomic Clock Enables Applications in GPS, and Radio Channel Density
Most atomic clocks are bench-bound, and even portable units can weigh in excess of 10 pounds. This invention is a cesium laser atomic clock that can be constructed using photoresist MEMS (microelectromechanical system) technology. The glass cell measures about 1 cubic...
Products: Electronics & Computers
Micro/sys (Montrose, CA) has released a host microcontroller equipped with StackableUSB architecture. The USB1032 industrial-grade microcontroller allows OEMs to fit their control system within a 1.85" x...
Products: Electronics & Computers
Fidelity Electronics (Toronto, Canada) has announced the release of the Very Personal Computer (VPC), a low-cost, fully preloaded, Wifi portable netbook computer. The VPC weighs only 1.5 lb. and measures 8.4" x...
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Webcasts
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