The greater number of electrostatic discharges (ESDs) that occur in nature is by air rather than contact. However, due to low reproducibility the current discharges, IEC 61000-4-2 defines current’s calibration an ESD gun must be made only for contact discharges. In work presented here, there attempt improve poor a significant observation derived from measurements and, more specifically, relatio...

a raid. It is curious that experience in one war appears to be almost valueless in the next. Treatment of wounds of the chest and of the abdomen was quite different in the South African War and in the Great War. The methods that proved most valuable in Madrid and Barcelona during the recent fighting in Spain would have been considered revolutionary in 1917 or 1918. Air-raid casualties fall into...

A previously perforated planar TEM specimen of silicon sample (8GLJH-060) was ion milled for 10s using two argon guns at an angle of 20°, 0.5mA per gun and a fixed voltage of 4kV. The time the specimen surface was in contact with air was minimized to 3min, by taking it out of the ion mill and putting it in the electron microscope airlock immediately afterwards. The silicon wafer was left in the...

Introduction: Air guns are widely used for recreation and to protect crops from animals. It is a pneumatic weapon capable of inflicting serious life-threatening injuries. The authors present case child subjected pellet injury the head due discharge an air gun while playing. Case report: A 3 ½ year old male who was 95 cm in height presented with circular perforated laceration 0.4 diameter surrou...

Ballistic resistance is affected by the projectile and armor material used. The character behavior of affects its ability to damage penetrate armor. velocity, mass shape are main factors in determining this case target plate. Therefore, study aims determine analyze effect on velocity with which it penetrates using a compressed air gun. Armor as ballistic test carbon steel plate thickness 0.8 mm...

Two stages gas guns are used for various purposes, particularly for mechanical characterization of materials at high rate of deformations. The performance of a two stages gas gun is studied in this work using the theory of the two-stage gas gun proposed by Rajesh, numerical simulation using combined Eulerian/ Lagrangian elements in Autodyna commercial code and experiment using a two stage gas g...