MEMs

Phonon Confinement Effect in TiO2 Nanoparticles as Thermosensor Materials

TiO2 or ZnO nanoparticles (NPs) have a very strong finite-size dependency in their Raman spectra or photoluminescence (PL) spectra due to the phonon confinement effect or the quantum confinement effect. Together with a fast grain growth kinetics and a high stability under high temperature and pressure, they can forensically retain the complete thermal history of an event. By spatially distributing these NPs during thermal events such as blasts or weapon tests, a spatially and temporally non-uniform thermal environment can be determined by a direct read off their Raman or PL spectra at various locations.

Posted in: Briefs, Aerospace, Defense, Thermal Management, Materials, Nanotechnology, Photonics, Force Sensors and Resistors, Sensors, Test & Measurement
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Counter UAV System

SteekRock UAV
London, UK
+44 (0) 20 7491 8186
www.sruav.co.uk

The use of unmanned aerial vehicles (UAVs) is one of the most significant technological developments in the last decade. However, where once such equipment was unique to military operations, the use of a new generation of small and cheap to buy UAVs has spread exponentially. This brings a new dimension to contemporary terrorism, with those determined to do harm, seeking different ways of carrying out attacks on civilians.

Posted in: Application Briefs, Aerospace, Defense, Antennas, RF & Microwave Electronics, Automation
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Nett Warrior

Nett Warrior is the US Army's next generation US integrated soldier system that replaces Land Warrior. It is designed to be an integrated dismounted situational awareness and mission command system for use during combat operations that enables fast and accurate decision-making during tactical operations.

Posted in: Articles, Aerospace, Communications, Defense, Board-Level Electronics, Electronic Components, Electronics, Electronics & Computers, Composites, Materials, Metals
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Evading In-Flight Lightning Strikes

MIT engineers are proposing a new way to reduce a plane's lightning risk using an onboard system that would protect a plane by electrically charging it. The proposal may seem counterintuitive, but the team found that if a plane were charged to just the right level, its likelihood of being struck by lightning would be significantly reduced.

Posted in: News, Defense
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Analytical Methods Help Develop Antidotes for Cyanide, Mustard Gas

To develop antidotes for chemical agents, such as cyanide and mustard gas, scientists need analytical methods that track not only the level of exposure but also how the drug counteracts the effects of the chemical. That's where the work of Erica Manandhar, postdoctoral research associate at South Dakota State University, comes in.

Posted in: News, Defense
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Army Aviators Test Next Generation Air-to-Ground Missile

Aviation testers have been busy testing the latest Army aviation missile, known as the Joint Air-to-Ground Missile (JAGM). The complex JAGM test was a collaborative team effort between the West Fort Hood, Texas-based Aviation Test Directorate of the U.S. Army Operational Test Command, Yuma Test Center at Yuma Proving Ground, Arizona, and Redstone Test Center based at Redstone Arsenal, Alabama.

Posted in: News, Defense
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New Vehicle Technology May Protect Troops from Blast-Induced Brain Injury

Researchers from the University of Maryland School of Medicine (UMSOM) and the University of Maryland's A. James Clark School of Engineering have developed a new military vehicle shock absorbing device that may protect troops from traumatic brain injury (TBI) after a land mine blast. Over the past 18 years of conflicts in Iraq and Afghanistan, more than 250,000 troops have suffered such injuries. Prior to this study, most research in this area focused on the effects of rapid changes in barometric pressure, also known as overpressure. "This is the only research so far to model the effects of under-vehicle blasts on the occupants," said Dr. Gary Fiskum. "We have produced new insights into the causes of TBI experienced by vehicle occupants, even in the absence of significant pressure changes." The research has led to the development of materials and vehicle frame design that greatly reduce injury caused by under-vehicle explosions. Dr. Fiskum and Dr. William Fourney, PhD, Associate Dean of the Clark School, Keystone Professor of Aerospace and Mechanical Engineering and Director of the Dynamic Effects Laboratory, were the first to demonstrate how the enormous acceleration (G-force) that occupants of vehicles experience during under-vehicle blasts can cause mild to moderate TBI even under conditions where other vital organs are unscathed.

Posted in: News, Defense
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Origami is Key to Air Force Concepts

For scientists and engineers at the Air Force Research Laboratory, the prospect of using origami to create complex, multi-functional materials from a two-dimensional substrate is a highly attractive concept, with the potential to deliver engineering solutions and new applications for the Air Force.

Posted in: News, INSIDER, Defense
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Blockage Detection System Could Prevent Aircraft Accidents

Acoustic methods have been used for detecting blockages in pipes for many years. Researchers set out to discover if similar methods could be used for real aircraft Pitot tubes, which can contain irregular shapes and passages, without needing a very complicated detection method.

Posted in: News, INSIDER, Defense
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Ultrafine Fibers Could Revolutionize Body Armor

Researchers at MIT have developed a process, called gel electrospinning, that can produce ultrafine fibers - whose diameter is measured in nanometers, or billionths of a meter - that are exceptionally strong and tough. These fibers, which should be inexpensive and easy to produce, could be choice materials for many applications, such as protective armor and nanocomposites.

Posted in: News, Defense
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