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Franklin, NERSC's Cray XT4, is among the largest machines on the list of Top 500 supercomputers in the world.
NERSC
is the flagship high performance scientific
computing facility for research sponsored by the U.S. Department
of Energy Office of Science.
NERSC, a national facility located at Lawrence Berkeley National Laboratory, is a world leader in providing resources and services that accelerate scientific discovery through computation.
Now Computing
A small sample of massively parallel scientific computing jobs running right now at NERSC.
Computational Nanoscience for Energy Conversion
Contour plots from Density Functional Theory calculations showing electronic density of states in a model highly mismatched alloy created by adding varying amounts of oxygen (3.125% in (a) and 6.25% in (b)) to a zinc (light blue) selenide (orange) compound. Oxygen atoms are surrounded by the dark-blue high density region.
Computations performed on Franklin have showed that introduction of oxygen impurities into a unique class of semiconductors known as "highly mismatched alloys" (HMAs) can substantially enhance the thermoelectric performance of these materials without the customary degradation in electric conductivity.
Thermoelectric materials involve direct conversion of temperature differences into electric voltage. In a paper published recently in Physical Review Letters, the researchers suggest that their results could allow a variety of abundant materials and new physics for scalable, widely tunable, high-thermopower thermoelectrics.
[ MORE...]
News Center
Take the NERSC Computer Security Tutorial
A new Cyber Security Tutorial is available. Users can help to keep NERSC more secure by understanding cyber security risks and taking precautions against them.
Hopper Phase 2 will be a Cray XE6 with a Gemini interconnect
The Gemini interconnect will improve performance of scientific applications as well as system reliability and resilience. You can see the Hopper Phase 2 cabinet covers.
Hadoop Available on the Magellan Cloud
The Hadoop environment is now available on Magellan. See Using Magellan.
Science News
Simulations Show That "Sweaty" Flowers Cool the World
The world is a cooler, wetter place because of transpiring flowers, say University of Chicago researchers who ran a variant of the NCAR-DOE Community Climate Model on NERSC's IBM Power5 "Bassi" system last year. Their 300-kilometers squared global simulations of air motion showed where annual precipitation is higher because of the presence of flowering plants. It is the vein density of leaves within flowering plants -- which is much higher than in all other plants -- that makes them very efficient at transpiring water from the soil back into the sky, where it can return to the Earth as rain. [MORE]
