nedeľa, 2. mája 2010

The human brain is not that special

Biology:
"A British-led study has found striking similarities among the human brain, the nervous system of the nematode worm Caenorhabditis elegans and computer chips. A team of U.K., U.S. and German neuroscientists and computer experts led by University of Cambridge Professor Edward Bullmore compared the way the systems are organized and found all three have the same networking principles. The researchers said they found all three share two basic properties: All have the same architecture, with the same patterns repeating at different scales; and all show what's known as Rentian scaling -- a rule used to describe the relationship between the number of elements in a given area and the number of links between them."

"Study: The human brain may not be special." Space Daily
The human brain may not be special

Astronomy:
"Josh Emery, research assistant professor with the earth and planetary sciences department at the University of Tennessee, Knoxville, has found evidence of water ice and organic material on the asteroid 24 Themis. This evidence supports the idea that asteroids could be responsible for bringing water and organic material to Earth."


"Scientists find evidence of water ice on asteroid's surface." Space Daily
Water ice on asteroid

Energy:
"Two trends are emerging for future renewable electricity. In the first, local solar, wind or biomass plants will produce more energy for small communities or single homes. In the second, large amounts of electricity will be generated by solar power stations in desert areas or extensive offshore wind farms, and delivered over long distances to densely populated areas. But how can electrical power be delivered over long distances without large losses? The solution to this problem is direct current. When electrical power at voltages from 100,000 to 1,000,000 volts is routed through high-voltage direct current (HVDC) transmission cables, energy losses are significantly reduced."

"How is electrical power carried across the sea." Space Daily
Electrical power transmission across the sea

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