نتایج جستجو برای: gas gun 8290

تعداد نتایج: 251516  

Journal: :Journal of the American Board of Family Medicine : JABFM 2007
Shalini G Forbis Terence R McAllister Susan M Monk Christopher A Schlorman Adrienne Stolfi John M Pascoe

BACKGROUND To ascertain the prevalence of gun ownership, gun safety education, and parental attitudes on gun counseling in a Midwestern sample. METHODS Parents seeking care at participating practices in the Southwestern Ohio Ambulatory Research Network were recruited to complete a survey about gun ownership, gun safety education, and gun counseling attitudes. Attitudes and beliefs were compar...

ژورنال: مواد پرانرژی 2017

In this paper experimental analysis of ballistic limit velocity of autoclaved aerated concrete (AAC) targets under rigid projectile penetration is presented. Industrial blocks with dimension of 600*250*200(mm) were cut into 125*125*50(mm) samples, impacted by gas gun using three different nose shaped projectiles (flat, ogive and conic). In this study damage mechanism and penetration depth were ...

حیدری, حسن, شکوری, رضا,

In this paper, SiO2 thin film is produced by two methods: at the first method, SiO2 is evaporated by the electron gun and oxygen gas is injected to compensate for oxygen loss due to dissociation. At the second method, silicon monoxide is evaporated by thermal evaporation and during the evaporation time, substrate is bombarded by the ion oxygen that produced by an ion source. The refraction inde...

Journal: :The New England journal of medicine 2013
Colleen L Barry Emma E McGinty Jon S Vernick Daniel W Webster

T horrific loss of life at Sandy Hook Elementary School in Newtown, Connecticut, in December 2012 has prompted a national conversation about guns and mental illness in the United States. This tragedy occurred less than 6 months after 70 people were shot in a movie theater in Colorado and after highly publicized mass shootings in Arizona and at Virginia Tech. These four events share two common c...

Journal: :The Journal of trauma 2004
Therese S Richmond Charles C Branas Rose A Cheney C William Schwab

BACKGROUND National surveillance systems have differentiated long guns into rifles and shotguns but fail to do so for handgun type. We sought to determine whether specific gun type data could be collected and whether knowledge of specific gun types (rifle, shotgun, pistol, revolver) could be used to distinguish gun homicide victims with respect to important injury parameters such as number of w...

Journal: :Pediatrics 2000
D Azrael M Miller D Hemenway

OBJECTIVE To determine gun storage practices in gun-owning households with children. DESIGN National random digit-dial telephone survey of 2521 households conducted in March 1999 through July 1999. This study uses a subsample of 434 households with children <18 years old in which a respondent reported either: 1) personally owning a gun, or 2) living in a gun-owning household but not owning a ...

2011
Soon Ja Seok Yun A Jung Yong Ju Jin In Cheol Park Soon Woo Kwon Yang Sup Kim Kwan Hee Yoo

One rare and interesting species collected from Seorak-san, Inje-gun; Yeonyeop-san, Hongcheon-gun; Daeam-san, Yanggu-gun, Gangwon-do; Pocheon-gun, Gyeonggi-do; Songni-san, Boeun-gun; Joryeong-san, Goesan-gun, Chungcheongbuk-do and Sobaeksan, Yeongju-si, Gyeongsangbuk-do is described and illustrated in detail. The species "Protodaedalea hispida Imazeki" and genus "Protodaedalea Iamzeki" has not ...

2017
Laura Layton

Gun violence is a leading cause of premature deaths in the United States. Evidence has linked higher levels of firearm ownership to an increased risk for violent crimes perpetrated with a firearm. Given that connection, the goal of this study is to use mathematical modeling techniques to better understand how different social conditions may impact gun-ownership rate. To accomplish that goal, we...

2013
Kerry O’Brien Walter Forrest Dermot Lynott Michael Daly

OBJECTIVE Racism is related to policies preferences and behaviors that adversely affect blacks and appear related to a fear of blacks (e.g., increased policing, death penalty). This study examined whether racism is also related to gun ownership and opposition to gun controls in US whites. METHOD The most recent data from the American National Election Study, a large representative US sample, ...

2005
Philip J. Cook Jens Ludwig Mark Duggan

This paper provides new estimates of the effect of household gun prevalence on homicide rates, and infers the marginal external cost of handgun ownership. The estimates utilize a superior proxy for gun prevalence, the percentage of suicides committed with a gun, which we validate. Using countyand state-level panels for 20 years, we estimate the elasticity of homicide with respect to gun prevale...

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