- Number 376 |
- November 19, 2012
Titan, a supercomputer at DOE's Oak Ridge National Laboratory, is the most powerful computer in the world, according to the Top500 list, a semiannual ranking of computing systems around the world. The list was announced at the SC12 International Conference for High Performance Computing, Networking, Storage and Analysis in Salt Lake City, Utah.
Titan is also one of the most energy efficient supercomputers. Titan came in at number three on the Green500 list, also announced at SC12. The list takes the world’s 500 most powerful supercomputers as ranked by the Top500 list and reorders them according to how many calculations they can get per watt of electricity.
Scientists working at SLAC National Accelerator Laboratory have captured the first single-shot X-ray microscope image of a magnetic nanostructure and shown it can be done without damaging the material.
This result not only demonstrates the success of a powerful new X-ray laser technique, but it also means that in the future researchers should be able to make movies showing tiny magnetic domains in the act of switching polarity, the process at the heart of computer hard-disk drives and future magnetic memory technologies. Understanding the details of magnetic switching could lead to faster, denser and more energy-efficient data storage devices.
The research involved 42 scientists from 16 institutions in five countries and is described in a paper in Physical Review Letters. Experiments took place at SLAC’s Linac Coherent Light Source, the world’s first hard X-ray laser, whose ultrabright, ultrashort X-ray pulses reveal never-before-seen structures and properties in matter.
As society's demand for renewable energy grows, the role of hydrogen continues to expand—both as a way to store renewable energy and create hydrocarbon fuel. However, producing it inexpensively and in sufficient amounts without using fossil fuels remains a challenge.
Scientists at DOE’s Pacific Northwest National Laboratory made headway toward that challenge by achieving uninterrupted hydrogen production from a photosynthetic microorganism for more than 100 hours in the presence of oxygen (O2). This achievement debunked the long-held belief that O2 inhibition of hydrogen (H2) production in traditional cultivation systems would make sustained H2 production during photosynthesis impossible.
Researchers at DOE's Oak Ridge National Laboratory have reported progress in fabricating advanced materials at the nanoscale. The spontaneous self-assembly of nanostructures composed of multiple elements paves the way toward materials that could improve a range of energy efficient technologies and data storage devices.
ORNL researchers combined theoretical and experimental studies to understand and control the self-assembly of insulating barium zirconium oxide nanodots and nanorods within barium-copper-oxide superconducting films.