CSMD Researcher Comments in Wired Science
In a recent edition of Wired magazine's ezine Wired Science, Bronson Messer, a senior researcher in the Computational Astrophysics group, discusses the benefits of using the latest supercomputers on his simulations of core-collapse supernovae.
“People have been trying to attack this on computers for 40 to 50 years,” Messer said. “We’re using simulations to basically pick a neutrino and ride along as it flies out of the star, and do this with as many neutrinos as possible. We’re finally starting to see some hints of what’s happening, and we’re pretty jazzed about it.”
The team has used Jaguar to simulate the supernova up to about 100 milliseconds after the shock wave begins, and they hope to reach half a second. “If we can use 180,000 processors, we’ll get much more accurate physics,” Messer said.
The full article can be seen HERE.
ORNL team's nanoscale theory and simulation underpin collaborator's discoveries
Nanoscale theory and computational simulations by a pair of ORNL scientists have contributed to discoveries recently published in leading scientific journals.
Vincent Meunier and Bobby Sumpter, both of the Computer Science & Mathematics Division and Center for Nanophase Materials Sciences, are co-authors on two papers that represent important advances in carbon-based materials research.
The researchers’ theory-based computational simulations have enabled collaborators at several institutions to understand why their experimental materials exhibit useful properties.
The full article can be seen HERE.
Infiniband Exceeds High-Speed TCP/IP
Researchers at the Energy Department's Oak Ridge National Laboratory have shown that InfiniBand can be used to transport large datasets via a dedicated network thousands of miles in length with a throughput unmatched by high-speed TCP/IP connections.
CSMD researcher Nageswara Rao presented a paper on the group's work, "Wide-Area Performance Profiling of 10GigE and InfiniBand Technologies," at the SC08 conference in November.
Rao said difficulties abound with large data transfers over high-speed wide-area networks, including packet conversion from storage networks and the complex task of TCP/IP tuning. "The task of sustaining end-to-end throughput…over thousands of miles still remains complex," the researchers wrote in the paper.
The full article at Government Computing News can be seen HERE.
The HPCwire summary can be seen HERE.
Erickson Serves as Committee Member for National Academy of Science Investigation
David Erickson, a Senior Scientist in ORNL's Computational Earth Sciences group, served as a committee member on the National Academy of Sciences' recent study to develop a better understanding of the potential scientific and technological impact of high-end capability computing (HECC) in fields of science and engineering of interest to the Federal government.
The fields chosen for the study were the atmospheric sciences, astrophysics, chemical separations, and evolutionary biology. The committee found continuing demands from the four fields for more, and more powerful, high-end computing. All four areas rely on HECC to carry out simulations of systems that are too complex to analyze through observation, experiment, or theory. Three of the four areas (the exception being chemical separations) are dealing with very large amounts of data and need HECC to handle them.
The report from this study "The Potential Impact of High-End Computing on Illustrative Fields of Science and Engineering," can be seen HERE.