Laboratory of Developmental Chronobiology spora, posttranscriptional mechanisms (e.g., nuclear Pediatric Service entry, phosphorylation, and proteolysis) appear to conMassachusetts General Hospital tribute to the appropriate time delays in the molecular and Harvard Medical School oscillations necessary to generate a 24 hr clock (see Boston, Massachusetts 02114 references in Price et al., 1998)....

Nowadays there are many software tools available which, in case of a gas release, allow to calculate the dispersion of the gases (and hence predict the size and shape of the cloud) and to calculate the overpressures as a function of distance if this gas cloud should explode. The next step is then to predict what the consequences of these overpressures will be: to what extent will buildings (and...

We test the performance of high-frequency regional P/S discriminants to differentiate between earthquakes and explosions at test sites and over broad regions using a historical dataset of explosions recorded at the Borovoye observatory in Kazakhstan. We compare these explosions to modern recordings of earthquakes at the same location. We then evaluate the separation of the two types of events u...

Molecular studies have the potential to shed light on the origin of the animal phyla by providing independent estimates of the divergence times, but have been criticized for failing to account adequately for variation in rate of evolution. A method of dating divergence times from molecular data addresses the criticisms of earlier studies and provides more realistic, but wider, confidence interv...

explosion has always been regarded as one of the most complicated engineering problems. as a result, many engineers have preferred rather simplified empirical approaches in comparison to extremely complex deterministic analyses. in this paper, however, a numerical simulation based on the combined finite/discrete element methodology is presented for analyzing the dynamic behavior of fracturing r...

An experimental study on maximum explosion pressure in closed vessel deflagration of stoichiometric gaseous mixtures, for various initial pressures within 0.3 – 1.2 bar and ambient initial temperature is reported. Explosion pressures and explosion times of stoichiometric methane-, ethaneand propane-air mixtures were measured in a spherical vessel and in two cylindrical vessels with different di...

To study the decompression effects of shaft explosion-proof door at different lifting heights, this paper designed gas explosion testing system. Based on test results, made a numeric analysis change regularities shock wave overpressure when was lifted heights. Finally, determined proper height and put forward active concept. The research showed that (1) decreased in power exponential relationsh...

In this article, which appeared in the June 1958 issue of the Soviet journal, Atomic Energy, Sakharov estimated that about 10,000 people would ultimately suffer cancers, genetic disorders, and other ill effects from the radioactivity produced by a I-megaton nuclear explosion in the atmosphere. According to this estimate, the 1961 Soviet test of a 58-megaton nuclear explosive-,an explosion that ...