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Briefs Physical Sciences
Tightly Coupled INS, GPS, and Imaging Sensors for Precision Geolocation
To address the issue of poor georegistration performance for small unmanned aerial vehicles (UAVs), navigation and target-location accuracy improvements achievable by tightly integrating an image-based feature-tracking algorithm with Global Positioning System (GPS) and a...
Briefs Manufacturing & Prototyping
Fabricating Biologically Inspired Artificial Haircell Sensors
As electronics packaging and equipment have decreased in size and weight, so have the potential dimensions of unmanned aircraft. Specifically, a classification of micro air vehicles...
Briefs Electronics & Computers
Polypeptide-Based Molecular Electronics
Polypeptide supramolecules that will self assemble from solution and will form molecular wires that exploit quantum mechanical transport mechanisms can enable the formation of molecular devices such as...
Briefs Photonics/Optics
Photon-Counting Chirped Amplitude Modulation Ladar
This work is a follow-on to an effort to develop a method using Geiger-mode avalanche photodiode (GM-APD) photon-counting detectors in the U.S. Army Research Laboratory’s chirped amplitude...
Briefs Physical Sciences
Measurement of Transient Heat Flux and Surface Temperature Using Embedded Temperature Sensors
A report describes approximate solutions for surface temperature and heat flux for two embedded temperature sensors. The solutions were verified and the range of validity was established using several methods including comparisons with an exact analytical...
Briefs Software
Considerations of Aeroacoustics in Turbojet-Engine Testing
A study of the aeroacoustics of a turbojet-engine test cell has been performed as one step in the development of a computational aeroacoustics capability (CAA) that could provide...
Briefs Physical Sciences
Imaging and Spectral Measurements of Explosions
A document describes experiments performed to investigate rates of delivery of energy onto targets from different explosive formulations. The experiments were designed to measure relative positions of blast fireballs and leading shock fronts; determine whether different explosive formulations exhibit...
Articles Aerospace
Active Thermal Management for Cooler Body Armor
The military places greater demands on its equipment — electronic and otherwise — than any other market segment. It is also true that it places its greatest thermal demands on the men and...
Briefs Electronics & Computers
Evaluation of Four Methods of Reconfiguring an FPGA
A study was performed to evaluate the relative merits of four methods of reconfiguring a field-programmable gate array (FPGA) in response to detection of a faulty configurable logic block...
Briefs Electronics & Computers
Asynchronous Architectures for Large-Integer Processors
New architectures have been developed for cryptographic hardware that offer high throughput, algorithm flexibility, radiation hardness, and low power. The asynchronous (clockless) architecture combines a dedicated large-integer processor (LIP), a field programmable gate array (FPGA), and a...
Briefs Electronics & Computers
Using High-Performance Computing Clusters to Support Fine-Grained Parallel Applications
A heterogeneous cluster comprised of host processors and field programmable gate arrays (FPGAs) was used to accelerate the performance of parallel...
Briefs Electronics & Computers
Implementing On-Board Cloud Detection on a Reconfigurable Computer
Reconfigurable Computers (RCs) combine traditional microprocessors with field programmable gate arrays (FPGAs), and are characterized by lower form/wrap factors compared to...
Briefs Materials
Polymer Matrix Composite Materials for a Structural Multifunctional Fuel Cell
A structural multifunctional fuel cell design enables material elements participating in power or energy processes to also carry significant structural loads. Power...
Briefs Materials
Mechanical Response of an Al-PTFE Composite to Uniaxial Compression Over a Range of Strain Rates and Temperatures
Reactive materials can be loosely categorized as composites of inert solid materials which, when subjected to a violent mechanical...
Briefs Materials
Novel Conductive Coatings of Carbon Nanotubes
Carbon nanotubes (CNTs) are the material of ever-increasing concern due to their excellent electronic and physicochemical properties. Currently, research has been focused towards their applications for use in chemical and biological sensors as well as their use in optoelectronic devices. One of the...
Briefs Mechanical & Fluid Systems
Water Mist System for Shipboard Machinery Space Fires
Water mist has been determined to be a preferred alternative to Halon 1301 total flooding to extinguish fires occurring in ship machinery spaces and pump rooms, because it is toxicologically...
Briefs Mechanical & Fluid Systems
Axial Field Electric Motor
An axial field electric motor comprises one or more elements such as a rotor mounted for rotation and multiple axial flux permanent magnets carried by the rotor. The axial flux permanent magnets are oriented such that...
Briefs Sensors/Data Acquisition
Miniature Rotorcraft Flight Control Stabilization System
Autonomous rotorcraft provide improved capability in performing military missions such as reconnaissance, targeting, border patrol, and environmental sensing. A common difficulty in...
Briefs Physical Sciences
Studies of Dynamic Fracture in Brittle Materials
A program of research spanning several years ending in November 2005 was dedicated primarily to formulation and analysis of canonical boundary- value problems in mathematical modeling of dynamic fracture in brittle materials. The sub-topics within the broad topic of dynamic fracture in brittle...
Briefs Physical Sciences
Acceleration Strain Transducer Containing Cantilever Flaps
A recently invented acceleration strain transducer is based on the principle of a conventional spring-and-mass acceleration transducer combined with a linear strain sensor that measures...
Briefs Physical Sciences
Simulation of Airflow Through a Test Chamber
A computational-simulation study of the flow of air through a thermo-anemometer chamber was performed to resolve what originally seemed to be an anomaly in the measurement data obtained by use of the...
Briefs Information Technology
Study of Submodeling of a Small Component in a Structure
A study was performed to evaluate the accuracy achievable in the use of submodeling in finite-element modeling of the mechanical response of a structural system that includes components...
Briefs Information Technology
Next-Generation Information Systems Architectures
A document describes a paradigm in which low-altitude unmanned aerial vehicles (UAVs) with wireless communication capability are used to assist networking among a set of ground stations. This new paradigm is attractive because UAVs can be dynamically deployed in a wide variety of geographical...
Articles Weapons Systems
Weapon and Armor System Power in Future Combat Vehicles
Future combat vehicles will require unconventional weapons and armor systems such as electromagnetic (EM) or electrothermal chemical (ETC) guns, electromagnetic (EM) armor, and directed-...
Articles Aerospace
Detecting Improvised Explosive Devices in Urban Areas
Improvised explosive devices (IEDs) are rudimentary bombs that generally consist of commonly found non-military materials. Although common IED threats include roadside bombs, suicide bombers...
Tech Transfer Reports Materials
Ceramic Manufacturing Technique Opens New Markets
Traditionally, ceramics have been thought of as hard and brittle, yet able to tolerate high temperatures. Now, Advanced Ceramics Research (ACR) of Tucson, AZ has developed a method of...
Tech Transfer Reports
New Micromachining Method Upgrades Microfluidic Chip Technology
Someday, you may be able to go to your neighborhood drugstore and choose from a diagnostic kit that can test for high cholesterol, a faulty gene that predisposes you to diabetes,...
Products
Satellite Phone
The 9555 satellite phone from Iridium Satellite LLC (Bethesda, MD) is compact and features an intuitive user interface, speakerphone, Short Messaging Service and e-mail capabilities, an upgraded mini-USB data port, and an...
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