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Coupling of Coastal Wave Transformation and Computational Fluid Dynamics Models for Seakeeping Analysis

New analytical tools improve understanding of vessel operating environments in the littorals.

This research focused on depth-integrated modeling of coastal wave and surf-zone processes in support of computational fluid dynamics (CFD) simulation of ship motions. There were two components of the project. The first was the development of a numerical dispersion relation for a family of Boussinesq-type equations commonly used in modeling of coastal wave transformation. The relation depicts numerical dissipation and dispersion in wave propagation and provides guidelines for model setup in terms of temporal and spatial discretization. The second component was an extension of existing depth-integrated wave models to describe overtopping of coastal reefs and structures along with a series of CFD and laboratory experiments for model validation. The basic approach utilizing the HLLS Riemann solver performs reasonably well and produces stable and efficient numerical results for practical application.

Posted in: Briefs, Aerospace, Defense
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Assessment of Non-Traditional Isotopic Ratios by Mass Spectrometry for Analysis of Nuclear Activities

Technique can be used to distinguish between commercial nuclear reactor fuel cycles, fuel cycles for weapons grade plutonium, and products from nuclear weapons explosions.

The objective of this work is to identify isotopic ratios suitable for analysis via mass spectrometry that distinguish between commercial nuclear reactor fuel cycles, fuel cycles for weapons grade plutonium, and products from nuclear weapons explosions. Methods will also be determined to distinguish the above from medical and industrial radionuclide sources.

Posted in: Briefs, Aerospace, Defense
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Sound-Off: How to Simulate the Impacts of an Exoskeleton

Over the past decade, warfighters’ personal loads have increased, leading to more injuries, pain, and discomfort. To relieve the burden, the military is investigating performance-enhancing exoskeletons. But how does an exoskeleton impact the soldier wearing it?

Posted in: News, News, Computer-Aided Design (CAD), Simulation Software, Software
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Army to Test-Fire Tactical Missile System

Field artillery soldiers will soon be ready to test-fire the modernized Army Tactical Missile System (ATACMS) at White Sands Missile Range, New Mexico. Bravo Battery, 2nd Battalion, 20th Field Artillery Regiment is undergoing intensive training on the latest versions of software before operational testing.

Posted in: News, Defense
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Researchers Achieve Breakthrough in Nuclear Threat Detection Science

Taking inspiration from an unusual source, a Sandia National Laboratories team has dramatically improved the science of scintillators — objects that detect nuclear threats. According to the team, using organic glass scintillators could soon make it even harder to smuggle nuclear materials through America’s ports and borders.

Posted in: News, Defense, Materials, Detectors
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Batteries That “Drink” Seawater Could Power Long-Range UUVs

The long range of airborne drones helps them perform critical tasks in the skies. Now MIT spinout Open Water Power (OWP) aims to greatly improve the range of unpiloted underwater vehicles (UUVs), helping them better perform in a range of applications under the sea.

Posted in: News, Defense, Energy Storage, Materials, Robotics
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Flight Deck “Ouija Boards” Go Digital

To make the jobs of aircraft handlers easier, the Navy developed the Deployable Ship Integration Multi-touch System (DSIMS), a mobile software package that features a digital touchscreen image of a ship’s flight deck or hangar bay, and can be used on a laptop or desktop computer. It replaces the “Ouija board” replica of the flight deck.

Posted in: News, Defense, Displays/Monitors/HMIs, Imaging
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Reconfigurable Radio Tracks Flights Worldwide

When Malaysia Air Flight 370 disappeared somewhere over the Indian Ocean in 2014, it had flown far beyond radar range. Under a new space-based air tracking system, no plane would ever be off the grid that way — and it is possible thanks in part to a collaboration with NASA, starting with a reconfigurable radio NASA uses to communicate with its satellites, rovers, and astronauts.

Posted in: News, Aerospace, Aviation, Defense
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How the Aerospace and Defense Industry is Taking-Off with Pervasive Engineering Simulation

The aerospace & defense industry is demanding more fuel efficient and environmentally friendly aircraft that keep passengers safe and comfortable. The defense sector must deliver the technological edge to the warfighter and ISR drones as quickly and affordably as possible. Space 2.0 and the New Space economy is driving accelerated innovation and disrupting the sector.

Posted in: White Papers, White Papers, Aerospace, Automotive, Defense, Bio-Medical, Medical
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Personalized Healthcare Calls for Innovative Wearables and Medical Devices

Because the world population is aging, chronic diseases are on the rise and healthcare costs are reaching unsustainable heights, it is essential to detect pathologies early. The Internet of Things (IoT) is now poised to transform the healthcare industry by providing wireless connectivity and sensing. Body-worn electronics and implanted devices, equipped with tiny sensors that continuously monitor vital parameters and securely report anomalies to appropriate physicians, will improve patients’ quality of life while delivering timely medical help. Personalized healthcare is making medicine participatory, personalized, predictive and preventive (P4 Medicine). Medical device and high-tech companies are joining forces to satisfy a growing demand that might reach 20 billion medical connected devices by 2020. Successful medical device and pharmaceutical companies are using engineering simulation to develop systems that ensure high reliability, provide data privacy and achieve regulatory compliance quickly. Learn how platform-based engineering simulation maximizes the IoT opportunities for personalized medicine.

Posted in: White Papers, White Papers, Aerospace, Automotive, Defense, Bio-Medical, Medical
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