MEMs

Castable, Relatively Stiff Acoustic-Damping Materials

A recently invented family of acoustic-damping materials offers advantages over prior acoustic-damping materials:

Posted in: Briefs, Materials
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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 effective method of detecting landmines, but the use of dogs is costly and can present enormous logistical problems. The objectives of the present research include, variously, supplanting the use of dogs; providing probabilities of detection sufficiently high for humanitarian purposes; enabling safe, rapid detection at low false-alarm rates as needed for military operations; and/or minimizing costs sufficiently to enable widespread application.

Posted in: Briefs, Physical Sciences
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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 circuitry of radio receivers — especially microwave receivers. The main motivation for this development is the need to make radio receivers much less vulnerable to electromagnetic weapons.

Posted in: Briefs, Physical Sciences
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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 the 3D velocity and temperature fields, respectively, in a volume of interest in a possibly turbulent flow. As its name suggests, the system utilizes defocusing digital particle-image velocimetry (DDPIV) for obtaining velocity data and liquid-crystal thermometry for obtaining temperature data.

Posted in: Briefs, Physical Sciences
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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 harmful or otherwise unwanted code into an application program that is being executed and then causes the injected code to be executed. The present improved defense method provides for a secure and efficient implementation of instruction-set randomization (ISR), incorporating several advances beyond related prior methods that utilize ISR.

Posted in: Briefs, Information Technology
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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 which digital images can be created and altered without leaving obvious traces can give rise to doubts about their credibility, especially when they are used as legal evidence. Like other proposed techniques of image forensics, the techniques reported here are subject to limitations. Because none of the techniques by itself offers a definitive solution to the digital-image-verification problem, the research continues in an effort to propose new techniques and combine them with existing techniques to obtain more reliable decisions.

Posted in: Briefs, Information Technology
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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 propeller and propulsor blades, submarine sails, ship hulls, rudders, control vanes, sonar domes, and other bodies for which hydrodynamic or aerodynamic properties are important considerations.

Posted in: Briefs, Information Technology
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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 vehicles: from concept; through research and development, acquisition, and sustainment; to the end of life. The JC-UGV is also intended to facilitate the move of the Robotic Systems Joint Program Office (RS-JPO) from Huntsville, Alabama to the Detroit Arsenal as part of a consolidation of military development and acquisition of all ground vehicles. An important part of the mission of the JC-UGV is to provide a system- integration laboratory that will include both robotic hardware and a distributed computational-simulation environment that will enable researchers and developers in the RS-JPO, industry, and academia to collaborate to solve complex problems. In addition to describing the aforementioned developments in detail, the document describes the organizational structure of the JC-UGV, discusses the role of the JC-UGV as one of several military organizations oriented toward lifecycle management, and summarizes JC-UGV university outreach, industry outreach, and pilot programs.

Posted in: Briefs, Mechanical Components
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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 ships, the TSCE is associated with a computing architecture characterized by modularity, extensibility, scalability, and amenability to upgrading of all software and hardware systems. A major feature of the ARMS approach is the use of a bandwidth broker that provides admission control and leverages differentiated-services and class-of-service functionalities of high end routers and switches in order to guarantee end-to-end QoS in a heterogeneous computing environment. Building upon the Phase I product, the Phase II development (1) provides continued assurance of network QoS for mission- critical tasks in the presence of single mode faults and such catastrophic faults as the loss of an entire data center, and (2) improves timely adaptation to network performance using probes and instrumentation to measure delay. The ARMS development also raises the level of abstraction in the use of model-driven development software tools for configuring, deploying, and achieving QoS in distributed real-time embedded systems.

This work was done by Balakrishnan Dasarathy of Telcordia Technologies, Inc. for the Defense Advanced Research Projects Agency.

Posted in: Briefs, Information Technology
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Object Detection and Screening

Brijot Imaging Systems, Orlando, FL, has introduced the BIS-WDS® GEN 2 object detection and people screening system that provides security officials with an effective method of detecting and locating suspicious objects on a person quickly and discretely. The system features full-motion, real-time passive millimeter-wave imaging that allows users to search for potential threats on an individual from a standoff distance while the person walks through the system's field of view. It also detects liquids and gels hidden beneath a person's clothing, as well as objects made of metal, plastic, composite, liquid, and other materials that contrast with the millimeter-wave energy naturally emitted by the human body.

The BIS-WDS GEN 2's sensors do not image anatomical details or emit radiation. The system can begin imaging hidden objects when a subject is about 15 feet from the millimeter sensor aperture with an optimal focal distance of 10 feet. The system continually looks for millimeter- wave contrast and detects items based on selected size settings, with the minimum definable size of 2.5 × 2.5". The automated detection engine is comprised of three images: the real-time CCD camera image, the raw millimeter-wave image, and the processed millimeter-wave image. A graphical user interface displays up to three detection items at a time, identifying detection events in real time as they occur.

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Posted in: Products
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