OBJECTIVES This study assessed the effects of seasons and temperature on injury rates during U.S. Army ordnance advanced individual training. METHODS Injury data were collected each week at two clinics serving two geographically separated military training units. Weekly injury rates were calculated as the number of injured soldiers in each battalion (numerator) divided by the total number of ...

A Finite Element Method (FEM) is presented to solve for the scattered magnetic vector potential from arbitrarily polarized targets typical of those encountered in Unexploded Ordnance (UXO) detection. Most previously developed numerical methods only solved problems in which axial symmetry could be exploited. This, of course, severely limits the capabilities and utility of such methods. The metho...

Airborne magnetic systems for mapping unexploded ordnance (UXO) and other shallow metals have been developed at Oak Ridge National Laboratory (ORNL) over the past five years .We have recently completed testing of a time-domain electromagnetic (EM) system to supplement the magnetic system for UXO investigations. The test was conducted at the Badlands Bombing Range (BBR) in South Dakota in Septem...

The U.S. Army holds title to one of the most envied weapon systems developed-the Abrams main battle tank (MBT). Militarily, this weapon represents the epitome of lethality and survivability on today's modern battlefield. To combat difficulties associated with maintaining this sophisticated weapon, the U.S. Army Research Laboratory (ARL) and the U.S. Army Ordnance Center and School (OC&S) combin...

An estimated 110 million landmines, mostly antipersonnel mines laid in over 60 countries, kill or maim over 26 000 people a year. One of the dilemmas for removing landmines is the amount of false alarms in a typical minefield. Broadband electromagnetic induction spectroscopy (EMIS) is a promising technology that can both detect and identify buried objects as landmines. By reducing the number of...

Five mechanisms have been described in the literature regarding lightning injury mechanisms. A sixth mechanism is proposed in this article, namely, lightning barotrauma. A simple laboratory experiment was conducted using ordnance gelatin for ballistic studies. Lightning was simulated in a high-voltage laboratory using an 8/20-microsecond current impulse generator and discharged through ballisti...

Chemical vapors originating from the explosive charge within landmines and unexploded ordnance (UXO) form a chemical “signature” unique to these devices. The fact that canines can detect this signature was a primary motivation for the Defense Advanced Research Projects Agency’s (DARPA) Dog’s Nose Program. One goal of this program was to develop electronic chemical sensors that mimic the canine’...

Import Competition and the Great US Employment Sag of the 2000s Author(s): Daron Acemoglu, David Autor, David Dorn, Gordon H. Hanson, and Brendan Price Source: Journal of Labor Economics, Vol. 34, No. S1 (Part 2, January 2016), pp. S141-S198 Published by: The University of Chicago Press on behalf of the Society of Labor Economists and the NORC at the University of Chicago Stable URL: http://www...

Match Bias in Wage Gap Estimates Due to Earnings Imputation Author(s): Barry T. Hirsch and Edward J. Schumacher Reviewed work(s): Source: Journal of Labor Economics, Vol. 22, No. 3 (July 2004), pp. 689-722 Published by: The University of Chicago Press on behalf of the Society of Labor Economists and the NORC at the University of Chicago Stable URL: http://www.jstor.org/stable/10.1086/383112 . A...

Remedial mine detection and the detection of unexploded ordnance (UXO) have become very important for humanitarian reasons. This paper addresses mine detection using commonly used Electromagnetic Induction sensors. We propose and evaluate two neural network approaches to mine detection which provide a robust non-parametric technique, based on training the networks using data from a previously c...