ScienceDaily: Top Technology News |
- Graphene gives up more of its secrets
- A manganite changes its stripes: Advanced Light Source uncovers colossal conductivity changes in a special material
- Breakthrough toward quantum computing
- Machines to compare notes online?
- When minor planets Ceres and Vesta rock Earth into chaos
- New ways to measure magnetism around the sun
| Graphene gives up more of its secrets Posted: 15 Jul 2011 10:55 AM PDT Scientists have used beamline 12.0.1 at the Advanced Light Source to investigate theories about the electronic structure of graphene never before tested by experiment. They find that near the neutral point of undoped graphene, graphene's semimetallic behavior includes very long-range interactions among electrons and other unusual properties, confirming that graphene is every bit as strange as expected -- perhaps even more so.  |
| Posted: 15 Jul 2011 10:55 AM PDT Manganites exhibiting colossal magnetoresistance and high-temperature superconductors are among materials that show their stripes, regions where electrical charges concentrate. Until now, only static stripes have been seen. A team of scientists have discovered a manganite whose stripes form or fall apart depending on the temperature, simultaneously giving rise to colossal changes in electrical conductivity.  |
| Breakthrough toward quantum computing Posted: 15 Jul 2011 10:55 AM PDT To build a quantum computer, one needs to create and precisely control individual quantum memory units, called qubits, for information processing. Scientists have made a breakthrough in the creation of massive numbers of entangled qubits, more precisely a multilevel variant thereof called Qmodes.  |
| Machines to compare notes online? Posted: 15 Jul 2011 10:53 AM PDT The best way for autonomous machines, networks and robots to improve in future will be for them to publish their own upgrade suggestions on the Internet. This transparent dialogue should help humans to both guide and trust them, according to new research.  |
| When minor planets Ceres and Vesta rock Earth into chaos Posted: 15 Jul 2011 10:51 AM PDT A new study examines the orbital evolution of minor planets Ceres and Vesta, a few days before the flyby of Vesta by the Dawn spacecraft. A team of astronomers found that close encounters among these bodies lead to strong chaotic behavior of their orbits, as well as of Earth's eccentricity. This means, in particular, that Earth's past orbit cannot be reconstructed beyond 60 million years.  |
| New ways to measure magnetism around the sun Posted: 14 Jul 2011 04:15 PM PDT NASA researchers have made use of old mathematical techniques and new insights on how coronal mass ejections travel to devise a fresh way to measure this magnetic environment in the sun's upper atmosphere, the corona.  |
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