This paper first addresses the question: what is a dust explosion? Afterwards, some specific issues are briefly reviewed: materials that can give explosions, factors influencing ignitability and explosibility of clouds, combustion clouds in air, ignition sources initiate primary secondary flash fires, explosions “hybrid mixtures”, detonation clouds. Subsequently, measures for explosion preventi...

We present the extinction curves of long gamma ray burst (GRB) host galaxies (here after GRB hosts) utilizing the extinction feature of the optical afterglow of gamma ray bursts. The extinction curve of a galaxy is essential to understanding its dust and gas properties which in return will help us to reveal the origin of GRBs. We find out that the shape of the extinction curves may be divided i...

Explosive atmospheres can be caused by gases, vapors, mist, dust, lint, or fibers of flammable substances. If there is a sufficient quantity the substance mixed with air, imminence an explosion depends on probability and efficiency ignition source. The type pressurized enclosure protection consists separating potentially explosive atmosphere from source maintaining overpressure inside using pro...

Supernova can be polarized by an asymmetry in the explosion process, an off-center source of illumination, scattering in an envelope distorted by rotation or a binary companion, or scattering by the circumstellar dust. Careful polarimetry is the most powerful tool to study the 3-D geometry of supernovae. A deep understanding of the 3-D geometry of SNe is essential in using them as calibrated di...

Abstract Coal dust explosion is one of the common accidents in mines. The flame generated process spreads rapidly, and high-temperature will cause personal injury equipment damage working environment. In order to study propagation characteristics coal explosion, four kinds experiments were carried out by using intelligent identification device, was simulated computational fluid dynamics (CFD) s...

The progenitor of the Type IIP supernova (SN) 2008bk was discovered in pre-explosion g′r′i′IYJHKs images, acquired with European Southern Observatory Very Large Telescope FOcal Reducer and low dispersion Spectrograph, High Acuity Wide field K-band Imager and Infrared Spectrometer and Array Camera instruments and the Gemini Multi-Object Spectrograph-South instrument. The wealth of pre-explosion ...