MEMs

Shaping Aviation: Metal with Memory

Through NASA’s Convergent Aeronautics Solutions (CAS) Project, a team of engineers working within its Spanwise Adaptive Wing (SAW) project is investigating the feasibility of bending or shaping portions of an aircraft’s wings in-flight, potentially increasing performance and efficiency by reducing weight and drag.

Posted in: INSIDER, News, Aviation, Defense, Composites, Materials, Metals
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Drone Control: How the Human Brain Can Guide Robotic Swarms

Who needs a keyboard, a mouse, or a joystick? A researcher from Arizona State University wants to command machines with the human brain.

Posted in: News, News, Aeronautics, Aerospace, Aviation, Motion Control
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Testing Large–Scale Vehicle–Borne Improvised Explosive Devices

In July of 2016, a refrigerator truck packed with explosives detonated next to a crowded apartment block in Baghdad’s Karrada neighborhood. The blast killed 323 people and was one of the worst Vehicle–Borne Improvised Explosive Device (VBIED also known as car bombs) attacks ever recorded. On May 30, 2017, a VBIED in a tanker truck ripped through the embassy quarter of Kabul, killing more than 150 people. Several embassies, including those of Germany and France, sustained damage despite the presence of blast protection structures.

Posted in: News, Defense, Test & Measurement
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Army Scientists Discover Power in Urine

Scientists at the U.S. Army Research Laboratory observed an unexpected result when combining urine with a newly engineered nano-powder based on aluminum. It instantly releases hydrogen from the urine at a much higher rate than with ordinary water.

Posted in: News, Defense, Alternative Fuels, Energy
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Putting Smart Weapons to The Test

In the old days, a slingshot, BB gun, rifle or cannon was only as smart as the marksman taking aim. Now, many weapons are guided to their targets with the precision of infrared sensors and lasers. The technology continues to advance, but testing technology has lagged behind, leaving new generations of weapons and their tactical advantages unavailable to today's troops.

Posted in: News, Defense, Detectors, Sensors, Test & Measurement
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Sensitivity Simulation of Compressed Sensing Based Electronic Warfare Receiver Using Orthogonal Matching Pursuit Algorithm

Electronic Intelligence Receiver (ELINT) is an important component in electronic warfare (EW) and layer sensing. The information it provides by constant surveillance can be used to detect, track and classify signals across the electromagnetic spectrum. The proper identification and reaction to the threat can avoid disaster and assure spectrum dominance for Air Force systems.

Posted in: Briefs, Aerospace, Electronics & Computers
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The Impact of Video Compression on Remote Cardiac Pulse Measurement Using Imaging Photoplethysmography

Remote measurement of physiological signals has a number of advantages over traditional contact methods. It allows the measurement of vital signals unobtrusively and concomitantly. In recent years, a number of approaches for imaging-based measurement of physiology using digital cameras have been proposed. Imaging photoplethysmography (iPPG) captures variations in light reflected from the body due to blood volume changes in microvascular tissue. It has been demonstrated that sub-pixel variations in color channel measurements from a digital single lens reflex (DSLR) camera, when aggregated, could be used to recover the blood volume pulse. Subsequently, it was shown that iPPG methods can allow accurate measurement of heart rate, heart rate variability, breathing rate, blood oxygenation and pulse transit time.

Posted in: Briefs, Aerospace, Test & Measurement
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Scaling LiDAR Optical Payloads from Drones to Miniature UAVs

The recent surge in demand for adaptive cruise control (ACC) and commercial autonomous vehicles has drawn a lot of attention to these innovative applications. Based on pulsed laser diodes and hybrid receivers with Avalanche Photodiodes (APDs) for laser range finding (LRF), these systems are often classified under the general acronym LiDAR (Light Detection and Ranging).

Posted in: Articles, Aerospace
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Subjective Mapping of Dust-Emission Sources by Using MODIS Imagery

Dust storms (5 to 100 km across) often originate from multiple dust-emission sources (1 to 10 km across). Remote-sensing-based dust-source identification is a challenge. A previous study developed a subjective approach for mapping dust sources by using enhanced MODIS satellite imagery; therefore, this study conducted mapping exercises to assess the reproducibility of this technique amongst multiple analysts and in different regions.

Posted in: Briefs, Aerospace, Test & Measurement
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Quality and Validation of Digital Designs for Aerospace and Defense

As aerospace and defense manufacturing becomes increasingly digitized—from the earliest design stages to the factory floor and beyond—data accuracy is fundamental to realizing the speed, quality and repeatability promised by interconnected and automated computer systems and manufacturing machines.

Posted in: Articles, Aerospace
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