I consider spherically symmetric scalar waves of two types: explosive waves in an infinite medium generated by a spherically symmetric source, and implosive waves in which the medium is contained inside a spherically symmetric source. The explosive waves travel outward, the implosive waves inward. Although there are exceptional cases, in general there are, at any time, shells in which the energ...

OVERVIEW: The terrorist attacks of September 11th, 2001 in the USA have radically changed the awareness of society towards both domestic and international security. These days, as a result of the destabilization of world affairs, terrorist attacks involving explosives or harmful chemical substances are happening all over the world, and the barbarity of such attacks has been worsening. In respon...

Realistic explosion effects can enhance the realism and immersion in virtual battlefield. The real-time explosion effects simulation of the explosion products and their interactions, such as explosive fireball, explosive smoke and explosive ash, will be exploded into two phases: explosions and fuel modeling. The explosions modeling describe the formation and spreading of the explosive fireball....

Background Intermittent explosive disorder is defined as a recurrent, problematic, and impulsive aggression that affects 3% to 4% of the US population. While behavioral genetic studies report a substantial degree of genetic influence on aggression and impulsivity, epigenetic mechanisms underlying aggression and intermittent explosive disorder are not well known. Methods The sample included 44...

Abstract In order to study the energy output characteristics of multi-component explosives mixed with aluminum powder and emulsified explosives, five groups containing different proportions were used for underwater explosion experiments overpressure tests in air. The experimental data show that when mass fraction increases from 0% 40%, shock wave 0.68 kJ·g -1 1.22 , which by 79.41%. Bubble incr...

INTRODUCTION the ground, however, the term "shock" 1.01 An explosion, in general, reis used, because the effect is like that of suIts from the very rapid release of a a sudden impact. large amount of energy within a limited 1.02 Nuclear weapons are similar to space. This is true for a conventional those of more conventional types insofar "high explosive," such as TNT, as well as their destructi...

The traditional quality detection method for transparent Nonel tubes relies on human vision, which is inefficient and susceptible to subjective factors. Especially for Nonel tubes filled with the explosive, missed defects would lead to potential danger in blasting engineering. The factors affecting the quality of Nonel tubes mainly include the uniformity of explosive filling and the external di...

a considerable amount of energy is released in the form of shock wave from explosive charge detonation. shock wave energy is responsible for the creation of crushing and fracture zone around the blast hole. the rest of the shock wave energy is transferred to rock mass as ground vibration. ground vibration is conveyed to the adjacent structures by body and surface waves. geological structures li...

in this paper, a study and design of energy conservation actions and the obtention of energy efficiency titles, according to the italian ministerial decree 20th july 2004, applied to lighting and electrical systemsin a school district managed by perugia province (italy), is presented.specifically, the analysis regarded the replacement of neon lamps with high efficiency ones, and the power facto...

We have performed 1-dimensional calculations for explosive nucleosynthesis in collapse-driven supernova and investigated its sensitivity to the initial form of the shock wave. We have found the tendency that the peak temperature becomes higher around the mass cut if the input energy is injected more in the form of kinetic energy rather than internal energy. Then, the mass cut becomes larger, an...