We present an approach for the efficient parallel solution of convection diffusion equations. Based on iterative nested dissection techniques [1] we extended these existing iterative algorithms to a solver based on nested dissection with incomplete elimination of the unknowns. Our elimination strategy is derived from physical properties of the convection diffusion equation, but is independent o...

Genetic searches often use randomly generated initial populations that maximize genetic diversity to thoroughly sample the design space. While many of these initial configurations perform poorly, the tradeoff between population diversity and solution quality is typically acceptable for small design spaces. However, as the design space grows in complexity, computational savings and initial solut...

Schistosomiasis, or bilharziasis, results from infection by one of several species of parasitic flukes of the genus Schistosoma. The World Health Organization describes schistosomiasis as a millenary disease, affecting over 200 million individuals living in 76 different countries across Asia, Africa, and the Americas. It is considered the most important helminthic human disease and constitutes ...

We show that Enterococcus faecalis can utilize ascorbate for fermentative growth. In chemically defined media, growth yield was limited by the supply of amino acids, and the cells showed a much higher demand for amino acids than when they were grown on glucose.

Nanoscale carbon has been making headlines for more than two decades. Whether furled up in carbon nanotubes or assembled into cagelike fullerenes, carbon at the atomic scale shows great potential in everything from photovoltaics to ultra-strong composite materials. Now, graphene -thin, planar sheets of carbon -promises to advance photonics with improved detectors, display circuitry, and even em...

BACKGROUND There is significant controversy surrounding attention deficit hyperactivity disorder (ADHD). While the existence of this disorder is generally accepted, debate continues in relation to aspects of assessment, as well as the effectiveness and choice of treatment options and their continuation into adult life. Management is further complicated as people with ADHD often have chaotic liv...

genus peucedanum belongs to the subfamily of apioideae (umbelliferae family) and is reported to have many medicinal properties. several spiecis of peucedum reported to have antispasmodic activity. p eucedanum pastinacifolium species grows in iran. however, so far there is no report on its antispasmodic activity. the objective of this research was to investigate antispasmodic activities of p. pa...

We present the results from a numerical study of critical gravitational collapse of axisymmetric distributions of massless scalar field energy. We find threshold behavior that can be described by the spherically symmetric critical solution with axisymmetric perturbations. However, we see indications of a growing, nonspherical mode about the spherically symmetric critical solution. The effect of...