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...

BACKGROUND Ultrasound speckle tracking from grey scale images allows the assessment of regional strain derived from 2D regardless of angle intonation, and it is highly reproducible. The study aimed to evaluate regional left ventricular functional reserve in elite soccer players. METHODS 50 subjects (25 elite athletes and 25 sedentary controls), aged 26 +/- 3.5, were submitted to an echo exam,...

Research into the relationship between body sway, aim-point fluctuation, and performance in pistol shooting has been inconclusive. The present study reexamined this relationship on an interindividual basis, as done in previous studies, and via intraindividual analysis, not previously examined. Five elite pistol shooters performed 20 shots similar to competition conditions. For each shot, body-s...

OBJECTIVE To examine whether gun assaults committed with semiautomatic pistols are more injurious and lethal than those committed with revolvers. SETTING Jersey City, New Jersey from 1992 through 1996. METHODS Using police records on fatal and non-fatal handgun assaults, t tests and chi(2) tests were employed to determine if attacks with pistols result in more shots fired than those with re...

The field of small self-cleaving nucleolytic ribozymes has been invigorated by the recent discovery of the twister, twister-sister, pistol and hatchet ribozymes. We report the crystal structure of a pistol ribozyme termed env25, which adopts a compact tertiary architecture stabilized by an embedded pseudoknot fold. The G-U cleavage site adopts a splayed-apart conformation with in-line alignment...

abstract background: measurement of grip strength is important in medical and ergonomy science. this study has two main aims. first, determine the relationship between anthropometric variables and grip strength, tow prioritization of these variables in predicting grip strength. methods: in this applied research , 204 people were participated and their hands were measured by digital caliper (mod...