نتایج جستجو برای: gas gun 8290

تعداد نتایج: 251516  

2008
Tomislav Kovandzic Mark E. Schaffer Gary Kleck

Estimating the Causal Effect of Gun Prevalence on Homicide Rates: A Local Average Treatment Effect Approach This paper uses a “local average treatment effect” (LATE) framework in an attempt to disentangle the separate effects of criminal and noncriminal gun prevalence on violence rates. We first show that a number of previous studies have failed to properly address the problems of endogeneity, ...

Journal: :Journal of Plasma Physics 2021

We present experimental data providing evidence for the formation of transient ($\sim 20~\mu$s) plasmas that are simultaneously weakly magnetized (i.e., Hall magnetization parameter $\omega \tau > 1$) and dominated by thermal pressure ratio thermal-to-magnetic $\beta 1$). Particle collisional mean free paths an appreciable fraction overall system size. These formed via head-on merging two launc...

Journal: :Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention 2003
A Horn D C Grossman W Jones L R Berger

OBJECTIVE To develop and evaluate a pilot program to reduce unauthorized access to firearms by youth by distributing gun safes and trigger locks to households. DESIGN Pilot intervention with pre/post-evaluation design. SETTING Two Alaska Native villages in the Bristol Bay Health Corporation region of southwest Alaska. SUBJECTS Forty randomly selected households with two or more guns in th...

Journal: :Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention 2002
M H Swahn B J Hammig R M Ikeda

OBJECTIVES To estimate the national prevalence of youth access to alcohol, a gun, or both alcohol and a gun, in their home and to describe the demographic characteristics associated with access to either alcohol or a gun. METHODS Cross sectional data from the 1995 in-home survey of the National Longitudinal Study of Adolescent Health, which used a nationally representative randomly selected s...

2017
Woon-Mok Sohn Byoung-Kuk Na Shin-Hyeong Cho Won-Ja Lee

A survey was performed to know the recent infection status of digenetic trematode metacercariae in clams and oysters from 4 sites in western coastal regions of the Republic of Korea (=Korea). Four species of clams (Mactra veneriformis, Ruditapes philippinarum, Cyclina sinensis, and Saxidomus purpuratus) were collected from Taean-gun, Chungcheongnam-do (Province), Buan-gun (County) and Gochang-g...

Journal: :Archives of pediatrics & adolescent medicine 2001
L H Freed D W Webster J J Longwell J Carrese M H Wilson

CONTEXT Despite the wide availability of guns in the United States, not all delinquent adolescents own guns and not all adolescent gun owners carry them at all times. Research about the factors that prevent high-risk youth from acquiring and carrying guns is limited. OBJECTIVE To determine, from the perspective of incarcerated adolescent males, factors that prevent acquiring or carrying guns,...

2000
Takegami

INTRODUCTION: Gene therapy using retroviral and, more recently, adenoviral vectors is gaining interest in orthopedics. Particle-mediated gene transfer with a gene gun is a novel non-viral alternative that carries great promise [1]. The basic principle of particle-mediated gene transfer is to use high velocity DNA-coated gold particles that are accelerated by high pressure helium gas to penetrat...

Journal: :Journal of epidemiology and community health 2006
Edmond D Shenassa Constantine Daskalakis Stephen L Buka

OBJECTIVE To estimate the degree to which the proportion of homicides and suicides committed with a gun is associated with reported availability of firearms across Chicago neighbourhoods. METHODS Data were collected as part of the Project on Human Development in Chicago Neighborhoods (PHDCN), a combined neighbourhood and individual level study of the city of Chicago. The study used data from ...

2017
David A Larsen Sandra Lane Timothy Jennings-Bey Arnett Haygood-El Kim Brundage Robert A Rubinstein

Gun violence in the United States of America is a large public health problem that disproportionately affects urban areas. The epidemiology of gun violence reflects various aspects of an infectious disease including spatial and temporal clustering. We examined the spatial and temporal trends of gun violence in Syracuse, New York, a city of 145,000. We used a spatial scan statistic to reveal spa...

Journal: :The Korean journal of parasitology 2007
Sang-Mee Guk Eun-Hee Shin Jae-Lip Kim Woon-Mok Sohn Kwang-Sun Hong Cheong-Ha Yoon Soon-Hyung Lee Han-Jong Rim Jong-Yil Chai

The infection status of mullets Mugil cephalus (n = 139) and gobies (n = 35) Acanthogobius flavimanus with metacercariae of Heterophyes nocens and Pygidiopsis summa was examined in 11 western, southern, and eastern coastal areas of the Republic of Korea, using a digestion technique. Heterophyid metacercariae were highly prevalent in mullets from western and southern coastal areas; Shinan-gun (1...

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