One of the more obvious consequences a dust deflagration inside process equipment or structure is mechanical damage caused by shock (compression) waves. This overpressure revealed through displacement equipment, outward deformation rupture enclosures constructed ductile materials, projection missiles. However, different type sometimes observed in ductwork connecting equipment. In particular, co...

1.2 Dynamo Theory and Saturation Fields There has been a major breakthrough in the conceptual understanding of astrophysical dynamos in the last few years. In traditional mean field dynamo theory, the turbulent velocity field that drives the “alpha” portion of the α−Ω dynamo was specified and held fixed. A weakness of the original theory was that the turbulent velocity field cannot be constant....

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...

We describe the set of explosive orbits in the region of attraction of an unstable attractor which is isolated in the sense of C.C. Conley. Sufficient conditions are given for the existence of explosions in certain parts of the region of attraction and for an unstable attractor to have finitely generated integral Alexander-Spanier cohomology groups. Finally, we study the case of singularities t...

Explosions in operating theatres do not occur frequently, but unless there is constant care and watchfulness, such catastrophies can descend with tragic suddenness, and may result in loss of life or limb. Those who work in operating theatres tend to forget the dangers lurking round the corner. The writer's purpose is to bring these hazards once again to their notice, and to point out afresh som...