This paper examines the merit of two propositions at the center of the debate on gun control in the aftermath of mass shootings in the United States: (1) gun violence and mass shootings are a cultural artifact (gun enthusiast perspective); (2) gun violence and mass shootings are more prevalent due to lax regulations (pro-gun control perspective). To evaluate the value of each proposition, the s...

The Electrostatic Charging Laboratory for Interactions between Plasma and Spacecraft (ECLIPS) research vacuum chamber has recently been developed as part of the Autonomous Vehicle Systems at University Colorado Boulder. experimental spacecraft charging facility allows conducting experiments relevant to charged astrodynamics in a space-like environment. This paper discusses development, characte...

Abstract The Hugoniot parameters of U71Mn steel under high pressure were studied by hypervelocity impact test with two-stage light gas gun. plate sample was carried out means symmetrical impact. minimum speed 1.843km/s and the maximum 5.018km/s. relation parameter C λ, then accuracy is verified according to equation state (the relationship curve between density). research results can provide re...

BACKGROUND To ascertain the prevalence of gun ownership, gun safety education, and parental attitudes on gun counseling in a Midwestern sample. METHODS Parents seeking care at participating practices in the Southwestern Ohio Ambulatory Research Network were recruited to complete a survey about gun ownership, gun safety education, and gun counseling attitudes. Attitudes and beliefs were compar...

The dynamic fracture of a body is a late-stage phenomenon typically studied under simplified conditions, in which a sample is deformed under uniform stress and strain rate. This can be produced by evenly loading the inner surface of a cylinder. Due to the axial symmetry, as the cylinder expands the wall is placed into a tensile hoop stress that is uniform around the circumference. While there a...

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...

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...