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Briefs Electronics & Computers
DC Power Converter for 200°C Containing SiC Transistors
A DC-to-DC power converter, nominally rated for a power of 180 W, an input potential of 28 V, an output potential of 270 V, and a maximum operating temperature of 200°C has been...
Briefs Electronics & Computers
Protection Schemes for Advanced Shipboard Electrical Systems
A research program has made progress toward the development of schemes for protection against faults in next-generation DC zonal shipboard electrical systems (DC SESs) and for...
Briefs Physical Sciences
Biologically Inspired Processing of Image and Sound Data
A report describes progress in a research program oriented toward developing artificial-intelligence capabilities for processing images and sounds in changing environments. This research focuses on extending the state of the art in mid-level processing of visual and auditory signals,...
Briefs Photonics/Optics
Miniaturized GPS Controlled-Reception-Pattern Antenna Array
A miniaturized Global Positioning System (GPS) antenna array is being developed for use on aircraft on which the room available for installation of this or any other equipment is...
Briefs Physical Sciences
Measuring Skin Friction in Complex Flows That Include Shocks
A methodology for measuring skin friction (also known as wall shear) in complex flows typical of those inside supersonic-combustion ramjet (scramjet) engines has been developed. The...
Briefs Mechanical & Fluid Systems
Generic Miniature Airplane for Research and Development
The Air Force Research Laboratory has promulgated the geometrical design of a miniature airplane denoted the Generic Micro Aerial Vehicle (GENMAV). This design is intended to serve as a...
Briefs Mechanical & Fluid Systems
Simulations of Brush Contacts of Homopolar Motor/Generators
A computational- simulation study of distributions of electric current and temperature in brushes and slip rings in two model homopolar- motor/generator configurations was performed in...
Briefs Manufacturing & Prototyping
Experiments in Vacuum Brazing of Titanium
An experimental study of vacuum brazing of titanium and of the effects of changes in brazing alloys and brazing process conditions has been performed. [As used here, “titanium” signifies both...
Briefs Manufacturing & Prototyping
Advances in Fabrication of Nanoscale Devices
Some advances have recently been made on several fronts in a continuing effort to develop of means of fabricating electronic and magnetic devices having dimensions of the order of tens to hundreds of...
Briefs Manufacturing & Prototyping
Inexpensive Free-Form Fabrication of Titanium-Alloy Parts
A continuing effort to devise relatively inexpensive means of manufacturing titanium-alloy parts has been focused on a free-form fabrication approach. As used here, “free-form...
Briefs Photonics/Optics
Compact Megawatt Infrared Free-Electron Laser Amplifier
A proposed high-gain free-electron laser (FEL) amplifier, conceived primarily for use in a maritime environment, would be capable of average output power of the order of a megawatt at one...
Briefs Photonics/Optics
Advances in Materials for Photonic Applications
Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio Aprogram of research has addressed multiple topics in the design, development, characterization, and utilization of new...
Briefs Electronics & Computers
Monitoring and Charging System for a High-Power Battery
Figure 1 is a simplified block diagram showing (1) a high-power rechargeable battery comprising multiple series-connected modules, each module containing multiple series-connected...
Briefs Electronics & Computers
Quantum Network Testbed
A document describes the world’s first quantum network testbed — an Internet-compatible fiber-optic data-communication network that is kept extremely secure by use of encryption with quantum key distribution (QKD). The testbed, located in the Boston metropolitan area, includes ten nodes, of which four run continuously...
Briefs Electronics & Computers
Time Coding of Asynchronously Transmitted Multi-Source Data
A method of time coding of asynchronously transmitted data from multiple sources has been invented. The method is especially applicable to a data-acquisition and transfer system that...
Briefs Materials
Making Ultra-Hydrophobic Textured Silicone-Rubber Surfaces
Silicone-rubber surfaces microscopically textured in such a manner as to render them ultra-hydrophobic have been fabricated by a method in which breath figures are utilized. Originally,...
Briefs Materials
High-Temperature Resins for Composite Materials
Improved, readily processable thermosetting polymer resins are being developed for use as matrix materials in composite-material structures in applications in which there are requirements for...
Briefs Materials
High-Strain-Rate Tests of Epoxy/Aluminum-Powder Composites
Initial tests have been performed in a continuing experimental study to determine selected mechanical properties, at high strain rates, of an epoxy and of composite materials consisting...
Briefs Materials
Continuous Carbon Nanofibers for Structural Composites
A program of research has addressed key issues in the production of continuous carbon nanofibers and the utilization of carbon nanofibers as the reinforcing components in matrix/fiber...
Briefs Information Technology
Development of Adaptive and Reflective Middleware
A report describes Phase II of the Adaptive and Reflective Middleware Systems (ARMS) program, which was focused on developing an adaptive and reflective network Quality-of-Service (QoS) infrastructure for the Total Ship Computing Environment (TSCE). Conceived for the next generation of Navy surface...
Briefs Mechanical & Fluid Systems
Establishment of a Center for Defense Robotics
A document presents an overview of the recently established Joint Center for Unmanned Ground Vehicles (JC-UGV), located at the Army's Detroit Arsenal in Warren, Michigan. The JC-UGV is intended to become the central facility for managing all phases of the life cycles of military robotic ground...
Briefs Information Technology
Parametric Design of Three-Dimensional Hydrodynamic Shapes
A method of parametric design of bodies having arbitrary three- dimensional shapes has been invented. The method is intended mainly for use in the design, analysis, and manufacture of...
Briefs Information Technology
Some Advances in Digital-Image Forensics
A program of research in the forensic analysis of digital images has yielded several proposed techniques for automated image-data processing to answer questions concerning the source, authenticity, and integrity of a given image or set of images. The need for such techniques arises because the ease with...
Briefs Information Technology
Thwarting Code-Injection Attacks Using SDT-Based ISR
An improved method has been devised for defending a server or other computer against a code-injection attack, in which an attacker exploits a hardware or software vulnerability to inject...
Briefs Physical Sciences
Liquid-Crystal-Particle Thermometry and Velocimetry System
A three-dimensional (3D) defocusing liquid-crystal-particle thermometry and velocimetry (3DDLCPTV) system has been designed and constructed (but not yet operated) for use in measuring...
Briefs Physical Sciences
All-Dielectric, Non-Electronic Radio-Receiver Front Ends
All-dielectric, non-electronic, photonicassisted front ends are being developed as alternatives to traditional metal antennas and the associated metal connections and input electronic...
Briefs Physical Sciences
Novel Methods of Detecting Buried Explosive Devices
Several novel methods of detecting landmines and other buried explosive devices have been proposed and are subjects of continuing research. The use of trained dogs has been shown to be an...
Briefs Physical Sciences
Castable, Relatively Stiff Acoustic-Damping Materials
A recently invented family of acoustic-damping materials offers advantages over prior acoustic-damping materials:
Briefs Materials
Low-Water-Permeability Encapsulants for Acoustic Sensors
Afamily of improved encapsulating materials for protecting underwater acoustic sensors has been invented. These materials could also be used for encapsulation or protective coating of...
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