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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...
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 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 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
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
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 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 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 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 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
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 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 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
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
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 Information Technology
A Formal Model of the Attack Surface of a Software System
A formal model has been devised to impart some mathematical rigor to the concept of the attack surface of a software system. Complementing the model is a definition of a quantitative...
Briefs Information Technology
Infrastructure for Development of Secure, Reliable Software
The Verification and Automated Reasoning research group at Cornell University has been building an infrastructure, comprising human expertise and computational resources, for the development of secure, reliable software for critical military applications. Such software includes distributed...
Briefs Physical Sciences
Synthesizing Pseudo-Finer-Resolution MODIS Data Products
A document discusses a methodology for synthesizing finerresolution data products from outputs of the Moderate Resolution Imaging Spectroradiometer (MODIS) instruments aboard NASA's Terra and Aqua satellites. Typical MODIS ocean color data have 1-km resolution, but those in five wavelength...
Briefs Physical Sciences
Two-Camera Imaging System for Kinematic Measurements
A high-speed imaging system has been devised as a noninvasive means of collecting data on the kinematics of working models of developmental underwater or aerial vehicles that would utilize...
Briefs Sensors/Data Acquisition
Characterization of a MEMS Directional Sound Sensor
There is a wide range of potential military applications in which ambiguity in bearing occurs with respect to sound. For example, autonomous unmanned aerial vehicles (UAVs) could employ a...
Briefs Medical
Genetic Studies of Responses of Bones to Mechanical Stresses
Progress has been reported in a continuing program of molecular genetic studies of the responses of bones to mechanical stresses. Prior studies in mice and humans had provided evidence that mechanical loading stimulates bone formation and that immobilization or loss of mechanical...
Briefs Medical
Macromolecular Carriers for Nanomedicine and Nano Devices
Tailoring the surface properties of biodegradable nanospheres and microspheres for in-vivo blood-contacting applications includes defining relationships among chemical composition, processing parameters, nanosphere sizes and size distributions, and surface structure. Developments include: 1)...
Briefs Materials
Fluidic Flexible Matrix Composites for Autonomous Structural Tailoring
In previous research, a high-mechanical- advantage actuator system inspired by the fibrillar networks in plant cell walls was developed. One of the basic elements in the...
Briefs Software
Software Optimizes Multi-Core Platforms
Perseus is a suite of tools that allows existing x86-based software (in binary form) to be optimized for commodity multi-core platforms. Optimizations are made with respect to both performance (e.g., by avoiding undesirable cache effects) and power consumption (e.g., by modulating frequency and voltage of...
Briefs Photonics/Optics
Lasing Consequences of Silicon Nanostructures
While silicon electronics has been a success in modem technologies, silicon photonics is still in development and in need of a laser source. Many approaches have been explored, from anodized silicon luminescence, to generating direct emissions by quantum-confinement, and to indirect down-conversion of a...
Briefs Photonics/Optics
Advances Toward Affordable High-Energy Laser Modules
A multidisciplinary research project entitled “Affordable High-Energy Lasers” has made numerous contributions to the development of several types of advanced laser modules, including not...
Briefs Photonics/Optics
Evaluation of Performance of WL Fe-Based Spin-LEDs
A study was performed to evaluate the performance of a recently developed type of Fe-based spin-light-emitting diodes (spin-LEDs) that incorporate wetting layers (WLs). [The term "wetting...
Briefs Materials
Cluster-Assembled Soft Magnets for Power Electronics Applications
This technique uses nanocluster assembly to produce model soft magnetic materials with simpler chemical composition than existing materials and well-controlled nanostructure, and...
Briefs Electronics & Computers
High-Voltage, High-Temperature Power Electronics Capacitor
A novel high-temperature, high-voltage power electronics capacitor incorporates materials of construction and electrical components that have been initially designed as a segment of an...
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