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Briefs Test & Measurement
Small-Scale Combustion-Chamber Testing Facility
A small-scale combustion-chamber testing facility has been designed and partly built for use in evaluating advanced combustor designs for future gas turbine engines. The specific model combustor...
Briefs Physical Sciences
Scaling of Flight Tests of Unmanned Air Vehicles
A program of research has addressed a methodology of scaling of flight tests of unmanned air vehicles (UAVs) intended primarily for military use in observing and/or attacking targets on the...
Briefs Test & Measurement
Measuring Corrosion-Related Properties of Coupled Metals
Amethod and apparatus have been conceived for using electrochemical impedance spectroscopy (EIS) for determining rates of corrosion of coupled metals. EIS has been used heretofore for...
Briefs Test & Measurement
Life Tests of a Microwave MEMS Capacitive Switch
Life tests have demonstrated the longevity of an electrostatically actuated capacitive switch of a microelectromechanical systems (MEMS) type suitable for handling radio signals having...
Briefs Information Technology
Multiscale Virtual Design and Testing of Materials
Progress has been made in research on several fronts in an effort to develop computational simulation capabilities for use in virtual design and testing of advanced structural materials. It is...
Briefs Information Technology
Shape-Based Recognition of 3D Objects in 2D Images
An object-recognition algorithm analyzes data from two-dimensional (2D) images to locate and identify possibly complexly shaped three-dimensional (3D) objects in possibly highly cluttered...
Briefs Information Technology
Advances in Algorithms for CFD and Finite-Element Simulation
A program of research and development has resulted in some advances in algorithms for computational fluid dynamics (CFD), finite-element simulation of solid objects undergoing large deformations, and some related topics. The main advances are summarized as follows:
Briefs Information Technology
Autonomous Vehicles Would Learn by Mimicking Human Drivers
A program initiated by the Defense Advanced Research Projects Agency (DARPA) and now also pursued by other agencies called “Learning Applied to Ground Robots” (LAGR), is developing...
Briefs Mechanical & Fluid Systems
Some Advances in Reducing Drag and Suppressing Convection
Theoretical and computational research has yielded some advances in the art of designing active feedforward and feedback controllers to suppress thermal convection and reduce drag (by...
Briefs Mechanical & Fluid Systems
Hybrid Three-Axis Vibration Reducers
Hybrid (passive/active) devices have been developed to reduce the magnitudes of possibly threedimensional vibrations coupled from vibrating equipment on platforms to bases that support the platforms. These...
Briefs Materials
Self-Lubrication of Hot YSZ-Ag-Mo Nanocomposite Coatings
An experimental study has been performed to learn about the physical and chemical mechanisms of self-lubrication of coatings that comprise nanostructured composites of yttria-stabilized...
Briefs Photonics/Optics
Infrared Data Link Using an MQW Modulator on a Retroreflector
A n infrared data link between a ground station and a small uninhabited helicopter in flight has been demonstrated in an effort to develop a type of system for free-space optical...
Briefs Photonics/Optics
Photonic-Crystal-Based Devices for Commercial Applications
Several analog-to-digital converter (ADC) devices and part of a multispectral receiver have been designed, fabricated, and tested to demonstrate their feasibility as part of an effort...
Briefs Electronics & Computers
Photonic Analog-to-Digital Converters
Early steps have been taken toward the development of analog-to-digital converters (ADCs) that would incorporate photonic quantizers based on the technology of InP semiconductors. These photonic ADCs are...
Briefs Electronics & Computers
Progress in Canted Sector Antennas and Non-Periodic Arrays
Progress has been made in a continuing effort to develop low-geometric-profile, wide-frequency-band microwave antennas intended for incorporation into wide-band aperiodic arrays for use...
Briefs Physical Sciences
Solid-State Viscosity Sensors For Military and Aerospace Applications
Embedded OEM application markets such as the military and aerospace industries are experiencing a growing demand for sensors that provide instantaneous and continuous process...
Briefs Photonics/Optics
Miniature Hyperspectral Sensors for Imaging on Small UAVs
As unmanned vehicles get smaller and smaller, operational expectations and mission objectives demand a much broader array of platform capabilities — a necessity even with reduced...
Briefs Electronics & Computers
Improved Magnetic Sensor Based on Giant Magneto-Impedance
A low-power, highly stable electronic sensor circuit for measuring a small change in the ambient magnetic field with high sensitivity exploits the giant magneto-impedance (GMI) effect,...
Briefs Electronics & Computers
Nanowire-Based Chemical and Biological Sensor Arrays
Acontinuing effort that supplements and complements the one summarized in the immediately preceding article is dedicated to the development of nanowire-based sensor arrays, with emphasis on maximizing the utility of such arrays for real-time sensing of molecular species associated with chemical...
Briefs Sensors/Data Acquisition
Dense Functionalized-Nanowire Biosensor Arrays
Progress has been made in the development of compact sensor arrays containing molecular electronic devices for detecting molecules of interest (especially biomolecules) with high sensitivity and...
Briefs Physical Sciences
Spintronic Effects in Semiconductor Nanostructures
Progress has been made in calculation of spintronic effects in semiconductor nanostructures. The calculations contribute to the body of theoretical knowledge complementing recent experimental advances in generating, transporting, and detecting coherent spin-polarized populations of electron and...
Briefs RF & Microwave Electronics
Traveling-Wave Wide-Band Microstrip Antennas
Microstrip antennas that can be made to perform well over relatively wide frequency ranges but are mechanically and electrically simpler than prior such antennas have been invented. These antennas...
Briefs Sensors/Data Acquisition
Nanosensor Arrays for Detecting Breast-Cancer Compounds
Arrays of nanosensors for detecting biomolecules associated with breast cancer are undergoing development. It has been proposed to construct the arrays as silicon-based large-scale...
Briefs Medical
Aptamer-Based Sensors for Detection of Proteins
Molecular aptamer beacons (MABs) are being investigated for use as rapid-signaling probe compounds for detecting specific proteins of interest (target proteins). In the MAB approach, one exploits...
Briefs Materials
Nanoparticle AlxMoyOz/Al Thermites
Research on the microstructures, chemical compositions, and reactivities of thermites that consist of or contain mixtures of MoO3 and Al particles has led to development of a process for making thermites that...
Briefs Materials
Polymeric “Smart” Skin Materials
"Smart” skin materials based, variously, on polymers, dendrimers, carbon nanotubes, and/or other tailored molecular components are being developed for use as conformal coating surfaces of mechanical structures, including those of aircraft, to impart enhanced functionality to the coated surfaces. As used here,...
Briefs Materials
Innovations Pertaining to Carbon-Based Materials
Some notable innovations in the design and manufacture of carbonbased materials have been made in a continuing program of basic research on carbon- based materials for use in propulsion systems of aircraft and spacecraft. The research has ranged over diverse topics that have included fabrication of...
Briefs Photonics/Optics
Adaptive Optoelectronic Eyes
Aprogram of research has built a technological foundation for further development of systems that could be characterized, variously, as "smart" cameras or adaptive optoelectronic eyes. A system according to this...
Briefs Photonics/Optics
Continuous-Wave Atom Laser
Progress has been made toward realization of a continuous-wave, phase-andamplitude- stable atom laser based on magnetic guiding, magnetic compression, and continuous distributed evaporative cooling of a sparse cloud...
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