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Displaying 26 - 50 of 251

Spherical Test Objects for Hand-held Metal Detector Characterization

September 12, 2018
Author(s)
Nicholas G. Paulter Jr., Donald R. Larson, John A. Ely
Measuring the detection performance of metal detectors (hand-worn, hand-held, and walk-through models) is based on the observation of an alarm indication (light, sound, vibration) given by the metal detector when a threat or test object is present. These

Walk-through Metal Detector Testing and the Need to Emulate Natural Body Motion

July 5, 2018
Author(s)
Nicholas G. Paulter Jr., Donald R. Larson, Nicklaus F. Troje
The effect of motion through the portal of a walk-through metal detector (WTMD) has often been considered to contribute to the uncertainty in detecting threat objects being carried through the WTMD. However, typical metrological testing uses a robotic

Electroshock Weapon Measurements

April 12, 2017
Author(s)
Nicholas G. Paulter Jr., David M. Jenkins, Norimitsu Ichikawa
Electroshock weapons (ESWs) are a commonly used tool in the escalation of force arsenal for law enforcement and the military around the world. ESWs function by providing a high-voltage low-current electrical shock that, when discharged into a live

An Investigation of the Temperature and Strain-Rate Effects on Strain-to-Failure of UHMWPE Fibers

October 18, 2016
Author(s)
Don Jenket II, Amanda L. Forster, Nicholas G. Paulter Jr., Tusit Weerasooriya, Carey A. Gunnarsson, Mohamad Al-Sheikhly
During a ballistic impact, Ultra High Molecular Weight Polyethylene (UHMWPE) fibers are subjected to high temperatures and high strain-rates. Their tensile strength increases with increasing strain-rate and decreases with increasing temperature. To

Long term stability of ultra high molar mass polyethylene fibres

September 19, 2016
Author(s)
Amanda L. Forster, Aaron M. Forster, Joannie W. Chin, Sylvain H. Petit, Kai-Li Kang, Nicholas G. Paulter Jr., Kirk D. Rice, Don Jenket II, Mohamad Al-Sheikhly
Abstract. The performance of ultra-high molar mass polyethylene (UHMMPE) fibres for ballistic protection is predicated on the development of a highly aligned molecular structure that allows the polymer to exhibit a superior strength in the axial direction