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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
Cray XT5 Hopper (Phase 1) Prepares NERSC for Petascale Computing
After several months of rigorous scientific testing, NERSC has accepted a 5,312-core Cray XT5 machine, called Hopper (Phase 1). [MORE]
Hopper in Production March 1
Hopper account charging has begun (charge factor=1, same as Franklin) and disk quotas will be enforced. Default $SCRATCH quota will be 2TB. File purging will start on June 1st. [MORE]
First Round of 2010 NISE Awards
About 29M hours of computing time is available to existing or new NERSC projects during AY2010. Eleven projects have been selected to receive ~12M hours. Approximately 17M hours remain available. [MORE]
Science News
Mitigating Global Climate Change
Simulations done at NERSC
show that cuts in greenhouse gas emissions might save arctic ice and reduce sea level rise.
The study, led by scientists at the National Center for Atmospheric Research (NCAR), shows that
while global temperatures would rise, the most dangerous potential aspects of climate change
could be partially avoided if emissions were cut by 70 percent this century.
[MORE]
