ScienceDaily: Top Technology News |
- Intelligent onboard transportation systems to prevent car crashes?
- Two-state dynamics recorded in glassy silicon
- New insights on how solar minimums affect Earth
- 'Hidden' galaxies of the universe have lower amounts of heavier elements
| Intelligent onboard transportation systems to prevent car crashes? Posted: 14 Jun 2011 05:39 PM PDT Since 2000, there have been 110 million car accidents in the United States, more than 443,000 of which have been fatal -- an average of 110 fatalities per day. These statistics make traffic accidents one of the leading causes of death in this country, as well as worldwide. More progress must be made to achieve the long-term goal of "intelligent transportation": cars that can "see" and communicate with other vehicles on the road, making them able to prevent crashes virtually 100 percent of the time.  |
| Two-state dynamics recorded in glassy silicon Posted: 14 Jun 2011 11:15 AM PDT Using high-resolution imaging technology, researchers have answered a question that had confounded semiconductor researchers: Is amorphous silicon a glass? The answer? Yes -- until hydrogen is added. For the first time, researchers directly observed two-state dynamics in a-Si, which disappears after hydrogenation.  |
| New insights on how solar minimums affect Earth Posted: 14 Jun 2011 10:05 AM PDT Since 1611, humans have recorded the comings and goings of black spots on the sun. The number of these sunspots waxes and wanes over approximately an 11-year cycle -- more sunspots generally mean more activity and eruptions on the sun and vice versa. Observations have shown, however, that magnetic effects on Earth due to the sun, effects that cause the aurora to appear, did not go down in synch with the cycle of low magnetism on the sun. Now, researchers report that these effects on Earth did in fact reach a minimum -- indeed they attained their lowest levels of the century -- but some eight months later. The scientists believe that factors in the speed of the solar wind, and the strength and direction of the magnetic fields embedded within it, helped produce this anomalous low.  |
| 'Hidden' galaxies of the universe have lower amounts of heavier elements Posted: 14 Jun 2011 08:56 AM PDT A unique example of some of the lowest surface brightness galaxies in the universe have been found by an international team of astronomers. The galaxy has lower amounts of heavier elements than other known galaxies of this type. The discovery means that small low surface brightness galaxies may have more in common with the first galaxies formed shortly after the Big Bang than previously thought.  |
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