Seafloor methane release due to the thermal dissociation of gas hydrates is pervasive across the continental margins of the Arctic Ocean. Furthermore, there is increasing awareness that shallow hydrate-related methane seeps have appeared due to enhanced warming of Arctic Ocean bottom water during the last century. Although it has been argued that a gas hydrate gun could trigger abrupt climate c...

OBJECTIVES (1) Determine the frequency of gun ownership, acquisition, and transfer; (2) assess gun storage practices; and (3) compare the views of firearm owning and non-owning adults regarding the protective value of keeping a gun in the home. SETTING AND METHODS Over three different time periods (1995, 1996, and 1999) stratified, random digit telephone surveys were conducted in a five count...

OBJECTIVE Relatively little is known about the behavior of adolescents around firearms. The present investigation was undertaken to estimate the proportion of community-residing adolescents who report that they have ever handled a gun without adult knowledge or supervision. METHODS A random digit dial interview was conducted with 5801 California adolescents as part of the California Health In...

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...

The 2011 attempted assassination of a US representative renewed the national gun control debate. Gun advocates claim mass-casualty events are mitigated and deterred with three policies: (a) permissive gun laws, (b) widespread gun ownership, (c) and encouragement of armed civilians who can intercept shooters. They cite Switzerland and Israel as exemplars. We evaluate these claims with analysis o...

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...

Two waves of longitudinal data were used to examine the sequencing between violent victimization, violent behavior, and gun carrying in a high poverty sample of African American youth. Multivariate logistic regression results indicated: (1) violent victimization T1 and violent behavior T1 increased the likelihood of initiation of gun carrying T2 when examined separately (by 132% and 91% respect...

A case-control study of 149 intentionally self-inflicted gun injury cases (including completed gun suicides) and 302 population-based controls was conducted from 2003 to 2006 in a major US city. Two focal independent variables, acute alcohol consumption and alcohol outlet availability, were measured. Conditional logistic regression was adjusted for confounding variables. Gun suicide risk to ind...

IC ER SPTIVES On contentious issues such as gun control, where advocacy groups on both sides claim to have the weight of public opinion behind them, polling can help clarify what Americans really think. Three decades of polling have painted a clear picture of public opinion about gun control. These polls show that public support for the regulation of firearms is strong, deep, and widespread. La...

• Cost saving The gun turret drive on a combat vehicle presents a very complex design challenge. When the vehicle travels over rough terrain, the gun turret drive compensates for the vehicle’s motion and keeps the gun pointed precisely at its target with 99.5% accuracy. In the past, General Dynamics Land Systems (GDLS) engineers used separate simulations to evaluate different aspects of the gun...