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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
Now ComputingA 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 CenterTake the NERSC Computer Security TutorialA 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 interconnectThe 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 CloudThe Hadoop environment is now available on Magellan. See Using Magellan. Science News
Type 1a Supernovae Asymmetry
Simulations show that sources of variability in type 1a supernovae will have to be taken into account
if astronomers are to use them
as "standard candles" for measuring cosmic distances
and the expansion of the universe.
The work, done by NERSC user Stan Woosley and others, used
multi-dimensional simulations to show that
the asymmetry of these stellar explosions is a key factor.
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