This paper describes a new fast and scalable parallel algorithm to compute global flow accumulation for automatic drainage network extraction in large digital elevation models (DEM for short). Our method uses the D8 model to compute the flow directions for all pixels in the DEM (except NODATA and oceans). A parallel spanning tree algorithm is proposed to compute hierarchical catchment basins to...

Background An increased level of low-density lipoprotein (LDL) has been shown to promote the accumulation of cholesterol within the intima layer of large arteries, which can be connected to the genesis of atherosclerosis. The LDL concentration on the endothelium has been found to be flow dependent, suggesting a relationship between the development of atherosclerosis and flow dynamics. In this s...

A new algorithm to extract the velocity caused by the external forces in molecular dynamic simulation of nanoscale flow problems is proposed. The flow velocity, an important component in these type of problems, is usually obtained from the average value in the time space because the accumulation of the thermal velocity will approach zero when the time period is large, but this method is not alw...