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Science at the petascale: Roadrunner results unveiled
Date:10/26/2009

ME-SCALES
How nanowires break under stress is simulated atom-by-atom over a period of time that is closer than ever to experimental reality to see how the movement of single atoms can change a material's mechanical or electrical properties.

  • EXPLORING MAGNETIC RECONNECTION
    Magnetic reconnection is a basic process that occurs within hot ionized gases known as plasmas. This process often leads to an explosive release of energy that is stored within the magnetic fields, and plays a key role in the earth's magnetosphere, solar flares, magnetic fusion machines, and a variety of astrophysical problems.

  • HOW SHOCK WAVES CAUSE MATERIALS TO FAIL
    Physicists use SPaSM computer code to conduct multibillion-atom molecular dynamics simulations of materials as extreme shock-wave stresses break the materials into pieces, for the first time attempting to create atomic-scale models that describe how voids are created, how materials may swell or shrink under stress, and how a once-broken bond might reform.

    About Roadrunner, the world's fastest supercomputer, first to break the petaflop barrier

    On Memorial Day, May 26, 2008, the "Roadrunner" supercomputer exceeded a sustained speed of 1 petaflop/s, or 1 million billion calculations per second. "Petaflop/s" is computer jargonpeta signifying the number 1 followed by 15 zeros (sometimes called a quadrillion) and flop/s meaning "floating point operation per second." Shortly after that it was named the world's fastest supercomputer by the TOP500 organization at the June 2008 International Supercomputing Conference in Dresden, Germany.

    The Roadrunner supercomputer, developed by IBM in partnership with the Laboratory and the National Nuclear Security Administration, will be used to perform advanced physics and predictive simulations in a classified mode to assure the safety, security, and reliability of the U.S. nuclear deterrent. The system will be used by sci
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  • Contact: Kevin Roark
    knroark@lanl.gov
    505-665-9202
    DOE/Los Alamos National Laboratory
    Source:Eurekalert

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