We show that the propagation of warps in gaseous disks can be strongly affected by compressional effects , when the thickness of the disk is taken into account. The physical reason is that, in realistic self-gravitating disks, the sound time through the disk is comparable with the rotation time; thus the vertical hydrostatic equilibrium cannot be maintained adiabatically as the wave propagates ...

We study the Edge Disjoint Paths (EDP) problem in undirected graphs: Given a graph G with n nodes and a set T of pairs of terminals, connect as many terminal pairs as possible using paths that are mutually edge disjoint. This leads to a variety of classic NP-complete problems, for which approximability is not well understood. We show a polylogarithmic approximation algorithm for the undirected ...

Recent data indicate one or more moderately nearby supernovae in the early Pleistocene, with additional events likely in the Miocene. This has motivated more detailed computations, using new information about the nature of supernovae and the distances of these events to describe in more detail the sorts of effects that are indicated at the Earth. This short communication/review is designed to d...

From 19/10/2008 to 24/10/2008, the Dagstuhl Seminar 08431 Moderately Exponential Time Algorithms was held in Schloss Dagstuhl Leibniz Center for Informatics. During the seminar, several participants presented their current research, and ongoing work and open problems were discussed. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put...

mixture of suspended small particles, fumes, and gases. More than 400 toxic compounds have been demonstrated in the smoke of a typical house fire. Polyvinyl chloride, a component of many plastic goods, generates at least 75 different toxic products when burned. Of these toxic substances, carbon monoxide (CO) appears to be the most common fatal substance associated with fire victims. Thermal inh...

Abstract Niumasi Coal Mine (located in Shaodong City, Hunan Province, China) was an important producing area of high-quality coking coal Province. After large-scale mining underground seams the area, there has been a large surface subsidence and serious land damage. The damaged urgently needs to be reclaimed. In this paper, suitability reclamation as arable comprehensively evaluated, catastroph...

The snow leopard ( Panthera uncia ) is one of the world's most elusive felids. In Bhutan, which 12 countries where species still persists, reliable information on its distribution and habitat suitability lacking, thus impeding effective conservation planning for species. To fill this knowledge gap, we created a country-wide model using “presence-only” data from 420 occurrences (345 sign survey ...

The criteria for planting maize should be consistent with sensible and ecological to determine the potential lands. However, there is still a lack of proven methodology this evaluation. purpose analysis was parameters that affect multi-criteria decision maize, aim new method on land suitability analysis. proposed based GIS-analysis management such as distance from roads, rivers, slope, LULC, el...

Land suitability analysis is a prerequisite to achieving optimum utilization of the available land resources. Lack of knowledge on best combination of factors that suit production of rice has contributed to the low production. The aim of this study was to develop a suitability map for rice crop based on physical and climatic factors of production using a Multi-Criteria Evaluation (MCE) & GIS ap...

There is no doubt that high blood lead levels are associated with mental subnormality and hyperactivity. Several recent studies in Britain and America have investigated the relation between moderate levels, i.e. between 20 and 40 microgram/100 ml and behavioural and cognitive phenomena. Epidemiological studies have generally failed to point to a clearcut relation between such levels and overact...