Vapor Pressure Data and Analysis for Selected Organophosphorous Compounds: DIBMP, DCMP, IMMP, IMPA, EMPA, and MPFA

Determining the thermophysical properties of chemical warfare agent simulants can help evaluate the performance of defensive equipment.

Knowledge of the physical properties of materials is critical for understanding their behavior in the environment as well as in the laboratory. Vapor pressure is an important physical property for a wide variety of chemical defense-related applications, including estimation of persistence, prediction of downwind time-concentration profiles after dissemination, generation of controlled challenge concentrations for detector testing, evaluation of toxicological properties, and assessment of the efficiency of air filtration systems.

Posted in: Briefs, Aerospace, Defense

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

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

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

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

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

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

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

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

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