نتایج جستجو برای: gun armament

تعداد نتایج: 6932  

Journal: :JAMA 2013
Dariush Mozaffarian David Hemenway David S Ludwig

THE TRAGIC SLAUGHTER OF INNOCENTS IN NEWTOWN, Connecticut, has horrified and refocused the nation on the burden of gun violence. Each year in the United States, more than 30 000 individuals are killed by guns' (homicides, suicides, and unintentional fatalities)—85 deaths per day plus many hundreds of nonfatal injuries. Gun homicide alone causes 11000 deaths each year,' more than all US troops k...

ژورنال: مواد پرانرژی 2020

When dealing with research and development of gun propellants, a less expensive, quicker and safer process of closed vessel evaluation adopted rather than gun firing. In the current research work a computer program (BRCBADR) has been developed for the burning rate reduction from closed vessel test data. Correct determination of thermo-chemical properties of propellants provides accurate results...

ژورنال: مواد پرانرژی 2014

This paper presents a new method to investigate plastic deformation of FCC metals in high strain rates. Experimental set up includes two stages gas gun, spherical projectile and target assembly. Target assembly includes front plate, two pressure bars, FCC specimen, three frames and rigid holder. The set-up is carried out according to the following method: a spherical projectile, accelerated to...

Journal: :ASEJ Scientific Journal of Bielsko-Biala School of Finance and Law 2020

2001
Yasushi Hayashi J. D. Ivers Donald D. Flechtner

A two-stage 500 kV 200-A ferroelectric electron gun has been designed, fabricated, tested, and used in a high power microwave amplifier experiment. We report on the operational characteristics of the gun including measurements of the beam dynamics. The optimum conditions for application of the trigger and its timing are also reported. Faraday cup measurement shows that the beam radius is 4.1 mm...

2017
Eugene Rozumov

The development of gun propellants from 2010 to 2016 has been a broad endeavor. Researchers worldwide have examined every facet of energetic materials involved with gun propulsion in efforts to improve both safety and performance. They have looked at individual molecules to maximize energy content, as well as revisiting past molecules and improving upon their original properties. A great deal o...

2015
Albert M. Isaacs Sung-Joo Yuh R. John Hurlbert Alim P. Mitha

BACKGROUND Penetrating nail-gun injuries to the head are rare, however, the incidence has been gradually rising over the last decade. While there is a large volume of case reports in the literature, there are only a few incidences of cerebrovascular injury. We present a case of a patient with a nail-gun injury to the brain, which compromised the cerebral vasculature. In this article, we present...

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