Suicide rates are higher among those who own a handgun and among those who [corrected] live in a household with a hand gun. This article examines the association between [corrected] gun ownership and mental health, another risk factor for suicide. Data from the General Social Survey, a series of surveys of U.S. adults, are analyzed to compare general emotional and mental health, sadness and dep...

A number of jurisdictions have been experimenting with new problem-oriented policing frameworks to understand and respond to gun violence among gang-involved offenders. These interventions are based on the “pulling levers” deterrence strategy that focuses criminal justice and social service attention on a small number of chronically offending gang members responsible for the bulk of urban gun v...

The X-Band Test Area (XTA) is being assembled in the NLCTA tunnel at SLAC to serve as a test facility for new RF guns. The first gun to be tested will be an upgraded version of the 5.6 cell, 200 MV/m peak field Xband gun designed at SLAC in 2003 for the Compton Scattering experiment run in ASTA [1]. This new version includes some features implemented in 2006 on the LCLS gun such as racetrack co...

A random sample of more than 10,000 undergraduate students, selected from 119 4-year colleges, answered a mailed questionnaire about gun possession and gun threats. Approximately 4.3% of the students reported that they had a working firearm at college, and 1.6% of them have been threatened with a gun while at school. Students are more likely to have a firearm at college and to be threatened wit...

Firearm-related injuries are a substantial public health problem. A wide array of policies designed to prevent these injuries have been discussed, but few are enacted into legislation. Even fewer have undergone scientific evaluation for their effectiveness. We offer a nosology for categorizing existing and future gun policies. A brief review of the effectiveness of existing gun policies is pres...

Gun bluing solution is commonly used to polish guns and prevent rusting. The authors report a case of a 2-year-old boy who inadvertently ingested approximately 15 ml of his father's Fox Gun Blue solution. The patient subsequently developed acidosis, hypotension, and coma. He died within four hours after ingestion. His plasma selenium level was 857 ng/ml. A brief review of other reported ingesti...

The LCLS injector must operate at 120 Hz repetition frequency but to date the maximum operating frequency of an S-band rf gun has been 50 Hz. The high fields desired for the LCLS gun operation limit the repetition frequency due to thermal expansion causing rf detuning and field redistribution. One method of addressing the thermal loading problem is too reduce the power lost on the cavity walls ...

We report on experimental and theoretical investigations of a 17 GHz RF photocathode electron gun. This is the first photocathode electron gun to operate at a frequency above 2.856 GHz. The 1.5 cell, π−mode, copper cavity was tested with 50 ns pulses from a 17.150 GHz klystron amplifier built by Haimson Research Corp. A Bragg filter was used at the RF gun to reduce the reflection of parasitic m...

OBJECTIVE To determine the association between mortality from violent or firearm related injury and previous handgun purchase. METHODS Case-control study of 213 466 Californians ages 21 and older who died in 1998; cases were the 4728 violent or firearm related injury deaths, with subsets by specific cause and means of death, and controls were the 208 738 non-injury deaths. The exposure of int...