INTRODUCTION Firearm violence injures or kills 100,000 Americans each year. This paper applies the Host-Agent-Vector-Environment model to this issue. Research on firearm violence tends to focus on two elements-the host (i.e., victims of firearm violence) and the environment (i.e., gun policies)-but little attention has been paid to the agent (the gun and ammunition) or the vector (firearm manuf...

DNA-raised antibody (Ab) responses have been compared for the dependence on CD4+ and CD8+ cells, the longevity of functional antigen (Ag) expression, and the nature of the Ag-presenting cell after intramuscular (i.m.) and gene gun inoculations. A plasmid expressing the hemagglutinin (HA) glycoprotein of influenza virus was used for immunizations of BALB/c mice. Intramuscular and gene gun-raised...

The development of a process to emplace a refractory metal liner inside a gun tube is described. The process consists of filling the liner with an elastomeric material and then slipping this arrangement into the gun tube. The ends of the liner are plugged with plastic disks and pressure is applied to the elastomeric material by a load frame. The original clearance between the liner and gun tube...

Can empirical data generate consensus about how to regulate firearms? If so, under what conditions? Previously, we presented evidence that individuals’ cultural worldviews explain their positions on gun control more powerfully than any other fact about them, including their race or gender, the type of community or region of the country they live in, and even their political ideology or party af...

OBJECTIVE To explore the type and quality of handgun safety information a typical consumer would obtain from a licensed gun dealer. METHODS Semistructured, interactional on-site interviews were conducted with licensed handgun dealers in 2 metropolitan areas. A variety of dealers (gun shops, pawnshops, general merchandise stores, and sporting goods stores) were visited. Investigators posed as ...

BACKGROUND A person is less likely to be accurately remembered if they appear in a visual scene with a gun, a result that has been termed the weapon focus effect (WFE). Explanations of the WFE argue that weapons engage attention because they are unusual and/or threatening, which causes encoding deficits for the other items in the visual scene. Previous WFE research has always embedded the weapo...

Friction ridge detail was enhanced on f ired and unfired 9 mm brass Luger ammunition casings using three techniques, two involving gun blue reagent at a concentration of 50% v/v. Fingermarks were deposited on 90 ammunition casings, and half were discharged using a Glock 19 semiautomatic pistol. Mark development was achieved using either superglue fuming followed by basic yellow 40 f luorescent ...

The evidential value of the finding "gun in the hand" has been rated differently in the course of time. While Casper (1857) considered it to be infallible proof of suicide, investigators in later years tended to see it more as a manipulation for the purpose of faking a suicide. In 71 cases of proven suicide by a shot in the head on which autopsies were performed by the Institute of Forensic Med...

We present a new compact electron gun based on the secondary emission through ionic bombardment principle. The driving parameters to develop such a gun are to obtain a quite small electron gun for an in-flight instrument performing Electron Beam Fluorescence measurements (EBF) on board of a reentry vehicle in the upper atmosphere. These measurements are useful to characterize the gas flow aroun...

Laser-induced breakdown spectroscopy (LIBS) has been used to determine whether the hands of a suspected gun user contain traces of gunshot residue. Samples are obtained by pressing adhesive tape against the skin of the suspect and analyzing the tape directly. When the suspect has fired multiple shots, or if the gun has not been cleaned, the gunshot residue provides a spectral signature that is ...