This paper states the importance of determining the muzzle leaving time of guns with a high degree of accuracy. Two commonly used methods are introduced, which are the high speed photography method and photoelectric transducer method, and the advantage and disadvantage of these two methods are analyzed. Furthermore, a new method to determine the muzzle leaving time of guns based on the combinat...

The use of pellet guns during the recent unrest in Kashmir as a method of crowd control has been questioned because of several deaths and numerous injuries. Across the world, these rubber pellets have been shown to inflict serious injuries, permanent disability, and death. The volatility of mob violence, inaccuracies in aim of the pellets, over-use of the pellet guns, and the perception of thei...

Penetrating craniofacial traumas are rarely seen in childhood, but can lead to serious morbidities or mortality associated with the injuries of vital neurovascular structures.1 Penetrating craniofacial injuries in childhood are most commonly caused by knives and guns, or fragments of glass and metal.2,3 Penetrating injuries from screwdrivers and spear guns are rare among children and very few c...

A set of software tools based on Pierce theory and the Cutler-Hines approach for thermal velocity effects have been developed for the design of sheet-beam electron guns. The tools yield parameters for rudimentary gun geometry, which are further refined using the 2-D particle-in-cell code EGUN. Candidate designs for guns suitable for applications to high-power, high-frequency microwave sources h...

Since 2015, tens of millions guns have entered the U.S. market. Using household survey data, we found that number firearms owned by adults increased from 265 million in 2015 to 326 2019. Over this period, proportion were handguns slightly, 42 44 percent, continuing a long-standing trend. Seventy percent pistols (102 million) and 30 revolvers (43 million); 5.7 stored cars. Sixty-three long rifle...

Modern viticulture cannot be practiced without the use of plant protection products to control diseases like downy mildew, powdery and pests. In severely sloping vineyards, where mechanization is not possible, pesticide application realized using spray guns, which a laborious, expensive, dangerous technique. these defined as “heroic viticulture,” vine-growers could seriously take advantage inno...

T horrific loss of life at Sandy Hook Elementary School in Newtown, Connecticut, in December 2012 has prompted a national conversation about guns and mental illness in the United States. This tragedy occurred less than 6 months after 70 people were shot in a movie theater in Colorado and after highly publicized mass shootings in Arizona and at Virginia Tech. These four events share two common c...

Firearms are a leading cause of mortality among adolescents, and the guns that adolescents use to harm themselves or others often come from their own homes. In this statewide, multi-language, community-based survey of 5,704 co-residing pairs of adolescents and their parents, we asked about guns in the home and compared their responses. The proportions of parents and adolescents responding affir...

A coil-gun uses pulsed currents of large magnitude to propel ferrous projectiles at high speeds. The various problems associated with high currents and magnetic fields are discussed, as well as the components and design of my experimental coil-gun. I tested the coil-gun at various charge voltages and different projectile sizes, then calculated the efficiency of the coil-gun with measured values...

E very time an infamous mass shooting takes place, a storm of rhetoric sweeps across this country with the fury of a wild fire. “Why are we letting these people carry guns?” “Why were they not hospitalized?” “The government needs to crack down on this issue!” What is the government’s response to these cries of concern? Politicians and the media attempt to ease public fears by drawing tenuous co...