نتایج جستجو برای: explosions

تعداد نتایج: 4234  

Journal: :Physical review letters 2002
Narciso Benítez Jesús Maíz-Apellániz Matilde Canelles

Supernova (SN) explosions are one of the most energetic---and potentially lethal---phenomena in the Universe. We show that the Scorpius-Centaurus OB association, a group of young stars currently located at approximately 130 pc from the Sun, has generated 20 SN explosions during the last 11 Myr, some of them probably as close as 40 pc to our planet. The deposition on Earth of (60)Fe atoms produc...

1998
Michael Neff Eugene Fiume

The expense, danger, planning and precision required to create explosions suggests that the computational visual modelling of explosions is worthwhile. However, the short time scale at which explosions occur, and their sheer complexity, poses a difficult modelling challenge. After describing the basic phenomenology of explosion events, we present an efficient computational model of isotropic bl...

2008
Philip A. Pinto Ronald G. Eastman

Observations of type Ia supernovæ at high redshifts have become an important tool for studying the geometry of the universe. The relation between the duration of the peak phase of a type Ia supernova’s lightcurve and its luminosity (broader is brighter) forms the cornerstone of this measurement, yet it is a purely empirical relation. In this paper we show that the relation is a natural conseque...

2008
Jordi José Margarita Hernanz

Classical novae are dramatic stellar explosions that take place in the accreted envelopes of white dwarfs in close binary systems. These unique cataclysmic events constitute a crucible where different scientific disciplines merge, including astrophysics, nuclear and atomic physics, cosmochemistry, high-energy physics or computer science. In this paper, we will focus on the nucleosynthesis accom...

ژورنال: مواد پرانرژی 2022

The study of the simultaneous impact of earthquakes and explosions on structures has been considered by researchers in recent years. On the other hand, irregular effects in structures lead to increased complexity in predicting the behavior of structures. Thus, in this article, for the first time, the simultaneous impact of earthquakes and explosions on irregular structures is investigated. For ...

1996
Brian W. Stump Craig Pearson

The cessation of testing of any nuclear explosive devices in all environments is the goal of the Comprehensive Test Ban Treaty. In order to assure compliance with such a treaty, an international monitoring system has been proposed. This system will include seismic, infrasound, hydroacoustic and radionucleide monitors located throughout the world. The goal of this system is the detection of any ...

Journal: :Fire 2023

Aspects of mathematical and physical modeling deflagration explosions emerging during atmospheric (outdoor) accidental are addressed. It has been demonstrated that when physically explosions, a stoichiometric mixture in the shape sphere or hemisphere supported by ground should be used. This allows us to research parameters blast loads for worst-case scenarios address accident using most conserv...

2010
Kevin Mackey Kazuya Fujita

In an effort to obtain ground truth (GT) classifications in support of nuclear explosion monitoring for continental regions of northeastern Russia, we relocated and assigned GT classifications to 118 seismic events reported in the International Seismological Centre (ISC) supplemented with previously unavailable local data. Of the relocated events, 26 events are classified as GT10. From these ev...

2009
Terrance Strother W. Bauer

Motivated by the success of kinetic theory in the description of observables in intermediate and high energy heavy ion collisions, we use kinetic theory to model the dynamics of core collapse supernovae. The specific way that we employ kinetic theory to solve the relevant transport equations allows us to explicitly model the propagation of neutrinos and a full ensemble of nuclei and treat neutr...

2009
K. T. Alligood - E. Sander - J. A. Yorke

Crises are discontinuous changes in the size of a chaotic attractor as a parameter is varied. A special type of crisis is an explosion, in which the new points of the attractor form far from any previously recurrent points. This article summarizes new results in explosions in dimension one, and surveys previous results in dimensions two and three. Explosions can be the result of homoclinic and ...

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