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Briefs Electronics & Computers
Ultra-Low-Power Radios for Ad-Hoc Sensing Networks
Anew method has been developed for the design of a miniature, low-power, low-cost radio node capable of self-organization and communication within an ad-hoc network. The integrated radio transceiver, combined with a backend processor in a single networkable node, offers unique network scalability...
Briefs Data Acquisition
MEMS Resettable Circuit Breaker and Switch for DC-DC Voltage Converters
Resettable circuit breaker cantilevers use silicon dioxide (SiO2) for temper ature compensation. The compressive stress in the SiO2 causes the cantilever to bow upwards 400...
Briefs Electronics & Computers
Finite-Element Simulations of Field and Current Distributions in Multifilament Superconducting Films
The separation of high-temperature superconducting (HTS) tapes in filaments is a viable approach to reduce AC losses in HTS high-power...
Briefs Mechanical & Fluid Systems
Nozzles for Focusing Aerosol Particles
Several nozzles have been designed to aerodynamically focus aerosol particles into a small-diameter jet, so that individual particles can be illuminated by a laser beam and their light scattering and/or laser-induced fluorescence (LIF) spectra can be measured. An additional nozzle can aerodynamically puff...
Briefs Mechanical & Fluid Systems
Parallel Hybrid Vehicles Using Fuzzy Logic Control
A fuzzy logic controller for hybrid vehicles with parallel configuration was proposed. Using the state-of-charge (SOC) of the energy storage, the driver command, and the motor/generator speed, a set of rules was developed. The fuzzy logic controller can determine the split between the electric...
Briefs Physical Sciences
Development of an Electrochemical Biosensor for Organophosphate Chemicals
Detection of organophosphate (OP) compounds has attracted much attention in terms of safeguarding human health, owing to their frequent use as pesticides in agriculture and their potential use as chemical warfare agents. Among a variety of biological methods based on the...
Briefs Physical Sciences
Novel Active Transient Cooling Systems
Energy-efficient cooling technology is extremely important in today’s society, considering the need for energy conservation and the urgent need to mitigate global warming. Near-room-temperature magnetic...
Briefs Physical Sciences
Diode Laser Sensor for Scramjet Inlets
The supersonic combustion ramjet (scramjet) engine is one of the more promising high-speed flight propulsion technologies. One of the reasons for this is the simplicity of the engine design, having no...
Briefs Physical Sciences
MALDI-MSI Imaging of Latent Fingerprints
For years, forensic scientists have been seeking new methods to improve existing techniques for the visualization of latent fingerprints. The structured combination of optical methods (diffused reflection, luminescence, UV absorption and reflection), physical methods (powdering, vacuum metal deposition,...
Briefs Physical Sciences
Battery Electrolyte Level Detector Apparatus
An apparatus has been developed for checking the electrolyte level in a battery, providing a safer and more efficient means to do so. The result is a non-intrusive apparatus and method of checking the electrolyte level that reduces the need to open the caps on the battery by checking the level externally.
Briefs Photonics/Optics
AlInGaN Bandgap and Doping Engineering for Visible Laser Diodes
There is a great need to develop chip-scale visible lasers for many applications, including laser sight, environmental monitoring, and compact pumping sources for ultra-short laser pulse generation, high-luminous full-color displays, new-generation solid-state lighting, etc. The...
Briefs Physical Sciences
Forehead-Mounted Sensor Measures Oxygen Saturation for Hypoxia Early Detection and Warning
Symptoms of hypoxia – a deficiency in the amount of oxygen reaching body tissues - have been documented among rotary-wing pilots and aircrew flying at...
Briefs Physical Sciences
Manifold-Based Image Understanding
The rapid growth of sensing and imaging technology, combined with the need for near-real-time action based on the sensed data, has rendered automatic processing, understanding, and decision-making vital to our...
Briefs Information Technology
Flexible Computing Architecture for Real-Time Skin Detection
In both the Air Force and search and rescue (SAR) communities, there is a need to detect and characterize persons. Existing methods use red-green-blue (RGB) imagery, but produce high false alarm rates. New technology in multispectral skin detection is better than the existing RGB methods,...
Briefs Electronics & Computers
Magnetic Random Access Memory Integrated Passive Components
An embedded magnetic memory technology was developed to be integrated into a Complementary Metal Oxide Semiconductor (CMOS) circuit fabrication process to provide radiation-hard logic...
Briefs Electronics & Computers
Differential Amplifier Circuits Based on Carbon Nanotube Field Effect Transistors (CNTFETs)
Since their discovery, carbon nanotubes (CNTs) have been extensively studied for their great potential in a variety of applications. Several desirable properties that CNTs possess include a high thermal conductivity, high electrical mobility, high electrical...
Briefs Photonics/Optics
Photorefractive Polymers for Updatable 3D Displays
Photorefractive (PR) polymer composites developed for 3D display applications contain a copolymer as the hole-transporting host matrix. The copolymer approach is followed to reduce the phase...
Briefs Mechanical & Fluid Systems
Membrane Pump for Synthetic Muscle Actuation
A synthetic muscle has been developed that uses inflatable balloons to produce a tensile force from a positive pressurization. Mechanical supply and ducting is used to provide the required pressurization. However, the mechanical supply and ducting that is currently used is limited in several respects. To...
Briefs Mechanical & Fluid Systems
Nonlinear, High-Fidelity, Aeroelastic Analysis for Novel Configurations
Efforts to develop morphing air vehicles with multiple mission capabilities have recently been undertaken by several research teams, including NASA’s Aircraft Morphing program and the Defense Advanced Research Projects Agency’s (DARPA) Morphing Aircraft Structures program....
Briefs Manufacturing & Prototyping
Shape Memory Polymer Process Development
This work introduces a simple technique of separately fabricating electrospun short fibers. This technique employs a paper mesh, which is placed between the needle tip and counter electrode of the...
Briefs Manufacturing & Prototyping
Surface-Plasmon-Enhanced Organic Thin-Film Solar Cells
Fabrication of two-dimensional metal nanoparticle arrays was achieved both by thermal annealing and nanosphere lithography techniques, which are both very fast and economic. The surface plasmon resonance of the fabricated nanostructure was analyzed experimentally by optical absorption...
Briefs Information Technology
Ballistic Filter for GPS and Accelerometer Measurements
Ballistic filtering describes the dynamic equations that can be used to form Extended Kalman Filters (EKF) for the estimation of a projectile’s trajectory. The steps associated with initialization and implementing an EKF are demonstrated through a specific task. The performance of an EKF...
Briefs Electronics & Computers
Procedure to Determine and Correct for Transmission Line Resistances for Direct-Current, On-Wafer Measurements
Resistances of tenths of ohms to several ohms in transmission lines have been measured in laboratory systems from the power supply to...
Briefs Electronics & Computers
Channel Field Effect Transistors
Narrow bandgap semiconductors offer high carrier mobilities and low contact resistances, while wide bandgap semiconductors offer high breakdown voltages. A series of heterojunction transistors has been investigated and proved to be effective for improving both speed and power output. These devices include double...
Briefs Materials
Outdoor Synthetic Aperture Acoustic Ground Target Measurements
A novel outdoor synthetic aperture acoustic (SAA) system consists of a microphone and loudspeaker traveling along a 6.3-meter rail system. This is an extension of a prior indoor...
Briefs Physical Sciences
Portable, Rapid-Test Fuel Tank Leak Detection System
In 1988, the EPA issued Underground Storage Tank (UST) regulations for fuel storage in order to implement monthly monitoring and annual tightness testing. Monthly monitoring requires that the...
Briefs Electronics & Computers
Self-Aware Computing
This project performed an initial exploration of a new concept for computer system design called Self-Aware Computing. A self-aware computer leverages a variety of hardware and software techniques to automatically adapt and...
Briefs Photonics/Optics
Computational Photonics in Laser Communications Through Clouds
This work explored the concept of creating a partially coherent laser beam consisting of an array of spatially overlapping or separated Gaussian beams with possible individual...
Briefs Materials
Fire Resistance of Geopolymer Concretes
Geopolymer concrete has been proposed as an alternative to Portland cement concrete in applications requiring high degrees of fire resistance, because the intrinsic chemistry of the geopolymer binder does...
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