Physical Sciences

Stories

Briefs: Defense

This project seeks to reproduce the neural circuits used by the nematode Caenorhabditis elegans for locomotion. Caenorhabditis elegans is a small (~1.2 millimeter) nematode found in rotting...

Briefs: Software

This research deals with the problem of modelling the orbit and attitude motion of uncontrolled manmade objects in orbit about the Earth, which...

INSIDER: Green Design & Manufacturing

On military live fire training ranges, troops practice firing artillery shells, drop bombs on old tanks or derelict buildings and test the capacity of new weapons. But those...

Briefs: Aerospace

The threat of improvised explosive devices (IEDs) to human life is grave, and countering this threat is a high priority for force protection during military...

Briefs: Aerospace

Molecules have internal motions that are characteristic of their structure and identity. These motions can be studied by spectroscopy in different regions of the...

Briefs: Physical Sciences

US national and many international hearing conservation programs (HCPs) have adopted a noise exposure criterion of 85 dBA for a time-weighted average of 8 hours, with a 3...

Briefs: Physical Sciences

Using the current method of characterizing waveguides manufactured for research in optical communications, it can take up to 8 hours to characterize the...

Briefs: Physical Sciences

The SuperMISTI detection system is a hybrid detection, identification, and imaging system for sources of gamma-ray radiation at stand-off distances. The system is based on...

Briefs: Physical Sciences

Fuel quality assurance is accomplished by conducting periodic fuel sampling for the condition monitoring of aviation fuel by detecting, measuring, and reporting the levels of...

Briefs: Physical Sciences

The goal of this work was to investigate the concept of using harvested energy to directly control the vibration response of flexible aerospace systems. Small, lightweight, flexible...

Briefs: Physical Sciences
Cascading Failures in Coupled Distributed Power Grids and Communication Networks

Emerging distributed power grid systems will integrate tightly coupled networks, namely a power grid and a communication network, to provide distributed power monitoring and control. While distributing power monitoring and control away from a central site enhances...

Briefs: Data Acquisition

The objective of this work was to develop a high-speed, three-dimensional (3D) confocal imaging system to study coupled fluidic...

Briefs: Physical Sciences

Given the current emphasis on sustainability, there is a growing interest in monitoring various facets of building resource consumption. Building monitoring and automation...

Briefs: Physical Sciences

Abullet cannot penetrate through a sandbag while an arrow can, so understanding the behavior of granular materials such as sand and its energy absorption in a blast is...

Briefs: Physical Sciences

T he human sensory systems most frequently used in military displays (vision and audition) are sometimes overloaded. When soldiers rely on visual or auditory displays, their situation...

Briefs: Physical Sciences

Given remote and direct physical measurements of a realistic ocean wavefield, the goal of this work was to obtain a high-resolution description of the...

Briefs: Physical Sciences

Laminated Carbon Fiber Reinforced Polymer (CFRP) composites are very effective in weight saving in aeronautical structural components. For these laminated...

Briefs: Physical Sciences

Polymer composites comprised of metallic particles distributed throughout a contiguous polymer matrix can often be modified to produce advanced composites...

Briefs: Physical Sciences

The testing of individual respiratory protection (IRP) devices is now accomplished with panels of human wearers. Historical at tempts to simulate the human face and head have...

Briefs: Physical Sciences

For air platforms, the installation of Structural Health Monitoring (SHM) systems is complicated by the fact that the majority of SHM devices need to be fitted on internal aircraft structure, underneath...

Briefs: Physical Sciences

The Army has acquired several hybrid platforms to assess the applicability of hybrid technology for military missions. These hybrid platforms include both series...

Briefs: Physical Sciences

Unattended ground sensors (UGS) are widely used in industrial monitoring and military operations. Such UGS systems are usually lightweight devices that automatically monitor...

Briefs: Physical Sciences
Component Identification in Multi-Chemical Mixtures with Swept-Wavelength Resonant-Raman Spectroscopy

The utilization of ultraviolet resonance Raman spectroscopy for the detection and identification of chemical, biological, and nuclear hazards is of great interest due to the sensitivity and specificity afforded by this technique. Detection by...

Briefs: Physical Sciences

This project endeavors to develop, validate, and calibrate cost-effective field test equipment for measuring tire characteristics on vehicles while driving off-road. The four wheel force transducers...

Briefs: Physical Sciences

Turbines in aircraft turbojet engines are being subject to increasingly higher temperatures to improve fuel efficiency. High turbine efficiency requires the ability of turbine blades to...

Briefs: Physical Sciences

The US Marine Corps and the US Army have been engaged in efforts to evaluate improved body armor, including armor to protect the extremities. These efforts are focused on both body armor...

Briefs: Physical Sciences

An oscillating current flowing through a coil produces an oscillating magnetic field. When an electrically conducting material like a metal is brought...

Briefs: Physical Sciences

The onset of local damage in structures, such as delamination, cracking, and fastener loosening, can often be difficult to detect and has long-term implications on the...

Briefs: Physical Sciences

Guided waves (e.g., Lamb waves) have been considered for many structural health monitoring (SHM) applications because of their ability to travel long distances and maintain...

Trending Stories

Articles: Energy

Thermal Management for Directed Energy Weapons

Videos