UNLABELLED Recent changes in the law concerning air gun ownership have made air guns a topical subject and many have called for even tighter restrictions. A case of accidental injury during play with an air rifle is described. It highlights the dental and soft tissue damage that can arise from an injury from such a 'toy' and outlines its subsequent management. CLINICAL RELEVANCE This case hig...

An indoor test facility for 20-mm and 30-mm aircraft Gatling guns was recently constructed at Hill Air Force Base in Layton, UT. In designing the range, the primary concerns were that the 30-mm gun muzzle blast overpressures were large enough to a) cause significant spallation of the concrete walls during the anticipated 20-year building usage, and b) potentially pose an auditory risk for perso...

A system is introduced for the simulation of spray painting. Head mounted display goggles are combined with a tracking system to allow users to paint a virtual surface with a spray gun. Ray tracing is used to simulate droplets landing on the surface of the object, allowing arbitrary shapes and spray gun patterns to be used. This system is combined with previous research on spray gun characteris...

Seemingly harmless low velocity weapons like air guns sometimes may cause deep penetration of tissues leading to serious disability or even death especially in children. Deep penetration is rare in adults. We present a case of penetration of anterior skull base by air gun pellet in an adult in whom the projectile could not be retrieved initially but became accessible for removal due to spontane...

A computer-based mathematical model is developed fqr the estimation of assessment of damage inflicted on an aircraft due to a ground-h,lscd air dcfcnce gun. It is assllmcd that thc aircraft is approaching thc targct from an arbitrary dircction and docs not changc it's trajectory during gun firing. Dimension of aircraft and trajcctory of warhead are assumed to be known. Damage to aircraft is cau...

Commercially available controls for reducing worker exposure to paint overspray were evaluated in six autobody shops and a spray-painting equipment manufacturer's test facility. Engineering control measures included spray-painting booths, vehicle preparation stations, and spray-painting guns. The controls were evaluated by measuring particulate overspray concentrations in the worker's breathing...

Measurements of the transmission of seismic survey signals in Australian waters are presented. The measured transmission loss showed: high variability of received signal sound exposure level at similar ranges when comparing all surveys (mean of standard deviation across ranges of 3-12 dB); high variability within a seismic survey (mean of standard deviation at any range of 2-4 dB); typical shot...