OBJECTIVES To determine the relative incidence of gun victimization versus self defense gun use by civilians in the United States, and the circumstances and probable legality of the self defense uses. METHODS National random digit dial telephone surveys of the adult population were conducted in 1996 and 1999. The Harvard surveys appear unique among private surveys in two respects: asking (1) ...

We present an unusual case of chlorobenzylidenemalonitrile (CS) tear-gas exposure from the unwitting discharge of a personal-protection handgun loaded with CS gas. The gun was in a bag of toys purchased from a local thrift store and was discharged by a child. The responding paramedic presumptively identified the substance as CS based solely on personal experience. This recognition led to subopt...

For a Czochralski growth of Ge crystal, thermal fields have been analysed numerically using the three-dimensional finite volume method (FLUENT package). The arrangement used in a real Czochralski crystal growth lab included a graphite crucible, heat shield, heating device, thermal insulation and chamber including two gas outlets. We have considered two cases for calculations, which are configur...

Unlike gun control, enhanced prison penalties for gun crimes enjoy widespread support from all sides of the U.S. gun policy debate. Prison sentence enhancements have the potential to reduce gun violence by incapacitating individuals who have been convicted of gun crimes and deterring such crimes in the future. Moreover, such a policy does not affect the ability of law-abiding adults to keep gun...

One in three U.S. households contains at least one firearm. Gun owners cite two main reasons for having a gun: hunting and self-protection. A majority of handgun owners believe that they are protecting their homes and families against violent assaults. But in a country where the majority of homicides and suicides involve a gun, it is reasonable to question whether access to a gun increases or d...

Abstract The high temperature and pressure gas in the combustion chamber pushes projectile towards muzzle during firing of gun. belt is squeezed deformed by forcing cone. In order to study dynamic engraving characteristics projectile, a short-barrel gun launcher was designed for experimental research. dynamics base curves process were obtained. Based on loading conditions, J-C elastic-plastic m...

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...

Objectives—One way law enforcement oYcers support firearm safety is by promoting the use of gun locks. This investigation examined law enforcement oYcers’ willingness to use gun locks on their own guns, as well as their opinions regarding gun locks in general. Setting—Law enforcement oYcers from an urban agency in the southern region of the United States. Methods—Free keyed cable gun locks were...