Cosmic ray bursts (CRBs) from mergers or accretion induced collapse of neutron stars that hit an Earth-like planet closer than ∼ 1 kpc from the explosion produce lethal fluxes of atmospheric muons at ground level, underground and underwater. These CRBs also destroy the ozone layer and radioactivate the environment. The mean rate of such life devastating CRBs is one in 100 million years (Myr), c...

Rapid evolutionary radiations provide insight into the fundamental processes involved in species formation. Here we examine the diversification of one such group, the cichlid fishes of Lake Malawi, which have radiated from a single ancestor into more than 400 species over the past 700 000 years. The phylogenetic history of this group suggests: (i) that their divergence has proceeded in three ma...

Anaesthetic agents and doses used can significantly impact cerebrocortical responsiveness as assessed by electroencephalography (EEG). The objective of this study was to evaluate the effect three different halothane concentrations on EEG Rock Doves using measures frequency distribution burst suppression. Eight healthy (Columba livia) were anaesthetized with in oxygen, their tracheas intubated l...

Seismic acquisition and monitoring system can collect, store, analyze and dispose the rock burst seismic waves or the vibration of other objects. This paper utilizes single chip computer technology, virtual instrument technology, sensor technology, database management technology, wavelet analysis technology, combining the real condition of the mine microseismic signal to establish a set of mine...

Sudden ground pressure disasters caused by deep mining such as rock burst and cave-in are major hidden dangers affecting safety production underground mine. The safe stable operation of monitoring platform is great significance for mine production. However, many small medium-sized enterprises make slow progress in the construction online due to limitations enterprise scale, capital capacity oth...

Rock burst is one of the most serious risks for underground coal mines, and associated dynamic waves generally cause roof falls large-scale shrinkage roadway. The roadway often seriously damaged by duplicated rock bursts. Previous research on propagation attenuation shock cannot explain well failure mechanisms surrounding under waves. To fill this gap, paper presents comprehensive fracturing pr...