Available online 7 April 2011 Purposes: To determine if perceived risk of criminal victimization, and past criminal victimization experiences, increases the likelihood of a person owning a gun for self-protection, and to determine if defects in past research concerning the way gun ownership was measured had obscured such effects. Methods: We analyzed data on over 2,500 U.S. adults, using differ...

This study examines the relationship between gun availability and crime in a cross-national sample of cities. Data from the International Crime Victimization Survey are used to examine three competing hypotheses. The results of the limited information maximum least squares regression analyses suggest that gun availability influences rates of assault, gun assault, robbery, and gun robbery. These...

Introduction: Phyllosilicates have been detected on the surface of Mars by both OMEGA/MEx and by CRISM/MRO [1-3]. Phyllosilicates have been found in some of the oldest terrains on Mars and are thought to date back to the Noachian era. These clays have especially been detected in the ejecta and central peaks of small impact craters [4, 5]. The exact processes that occurred to form these clays ar...

The flow characteristics of propellant gases inside the gas cylinder weapon gas-operated mechanism, applied to UK-59 machine gun, are studied. Computational Fluid Dynamics (CFD) in ANSYS Fluent is used for simulation through port from barrel bore and back. study's findings presented along with piston law motion thermodynamic quantities cylinder, specifically pressure, temperature, velocity dist...

OBJECTIVE To determine whether pediatricians accurately estimate the likelihood of gun ownership among their patients' families. Design. Self-administered, written surveys completed simultaneously by pediatricians and their patients' parents. SETTING A total of 23 pediatric practices and hospital-based clinics in three cities in the United States. SUBJECTS A total of 66 pediatricians paired...

Experiments have been performed at ASDEX Upgrade, aiming to investigate the impact of lithium in an all-metal-wall tokamak and attempting to enhance the pedestal operational space. For this purpose, a lithium pellet injector has been developed, capable of injecting pellets carrying a particle content ranging from 1.82 × 10(19) atoms (0.21 mg) to 1.64 × 10(20) atoms (1.89 mg). The maximum repeti...

OBJECTIVES To describe a gun exchange program and assess potential benefits for participants and host communities. METHODS Mail survey of participants in a Sacramento, California gun exchange program, August 1993; the response rate was 79%. Comparative data were obtained from nationwide polls of gun owners. RESULTS Most (62%) respondents were men; 40% were more than 55 years old; none was l...

BACKGROUND Gun possession by high-risk individuals presents a serious threat to public safety. U.S. federal law establishes minimum criteria for legal purchase and possession of firearms; many states have laws disqualifying additional categories for illegal possession. METHODS We used data from a national survey of state prison inmates to calculate: 1) the proportion of offenders, incarcerate...