نتایج جستجو برای: air gun
تعداد نتایج: 211958 فیلتر نتایج به سال:
Stereotypes, expectations, and emotions influence an observer's ability to detect and categorize objects as guns. In light of recent work in action-perception interactions, however, there is another unexplored factor that may be critical: The action choices available to the perceiver. In five experiments, participants determined whether another person was holding a gun or a neutral object. Crit...
Countless children and youth are exposed to gun violence each year--at home, at school, in their communities, or through the media. Gun violence can leave lasting emotional scars on these children. This article reviews research regarding the psychological effects of gun violence on children and youth, and offers suggestions for how parents, school administrators, and mental health workers can m...
OBJECTIVE To estimate the prevalence of gun ownership and methods of gun storage in homes of pediatric patients before and after an educational intervention. DESIGN Before and after trial. SETTING Hospital based, inner city, pediatric primary care practice. PARTICIPANTS Consecutive sample of parents of patients with appointments August to November 1994. INTERVENTION Before the intervent...
Title of Thesis: GUN ACCESS AND FEMICIDE: A DIFFERENTIAL IMPACT OF FIREARMS ON INTIMATE KILLINGS Amanda Brown Cross, Master of Arts, 2005 Thesis directed by: Professor Gary LaFree Department of Criminology and Criminal Justice Studies of intimate partner homicide have repeatedly suggested that gun accessibility increases the risk that a confrontation between intimates will end in the death of o...
A single-stage, sensor less, coil gun was designed to demonstrate the capability to accelerate a ferromagnetic projectile to high velocity. This paper summarize all important steps during coil gun design, such as physical laws of the coil gun, preliminary calculations, the testing device and final product. The electromagnetic FEA model of the capacitor-driven inductance coil gun was constructed...
OBJECTIVE To describe gun shows and assess the impact of increased regulation on characteristics linked to their importance as sources of guns used in crime. DESIGN Cross-sectional, observational. SUBJECTS Data were collected at a structured sample of 28 gun shows in California, which regulates these events and prohibits undocumented private party gun sales; and in Arizona, Nevada, Texas an...
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, ...
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...
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...
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...
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