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Briefs Imaging
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 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 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 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 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 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 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 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 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 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 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
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...
Articles Defense
VPX: The Rugged Bus Architecture for Embedded Military Applications
For over two decades, the VMEbus has maintained its position as the open standard bus architecture of choice for defense and aerospace applications. While VME, a parallel bus,...
Articles Aerospace
Creating a Synthetic Virtual Instrument for Avionics Testing
The demand for fast evolution and increased flexibility of electronics systems in many different industries and applications has driven the trend for increasing software content of...
Briefs Mechanical & Fluid Systems
Simulations of Stall and Stall Control in Turbocompressors
Anumerical-simulation study of stall and stall control in radial and axial compressor stages of gas turbine engines has been performed. This and other similar studies are needed because...
Briefs Information Technology
Application of CFD to a Slender-Bodied, Finned Projectile
In an application of computational fluid dynamics (CFD), flow fields about a slender-bodied finned projectile and the resulting aerodynamic forces and moments on the projectile were...
Briefs Information Technology
Multi-Scale Model of Failure in a Composite Material
An adaptive concurrent multilevel computational model of failure in a heterogeneous-material structure has been developed. As used here, "concurrent" is a term of art characterizing a class of structural/material models that (1) incorporate submodels representing material substructures at...
Briefs Electronics & Computers
Adaptive Quantum Design of Semiconductor Devices
The term "adaptive quantum design" denotes a methodology for systematically seeking robust, manufacturable designs of semiconductor devices — especially semiconductor optoelectronic devices...
Briefs Electronics & Computers
Real-Time Simulation and Semiautomated Design of Complex ICs
A project called “System on a Chip Real-Time Emulation” (SOCRE) was undertaken to develop and demonstrate a methodology of simulation of operation and semiautomated design of...
Briefs Electronics & Computers
A Study of Two Ferrocene-Based Molecular Electronic Devices
Acomputational-simulation study of two ferrocene-based molecular electronic devices was performed as part of a continuing effort to develop a capability for ab initio design of...
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...
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 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 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
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 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 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 Physical Sciences
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 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...
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