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+ - Researchers Create First All Optical Nanowire NAND Gate->

Submitted by mhore
mhore (582354) writes "Researchers at the University of Pennsylvania have created the first all optical, nanowire-based NAND gate which paves the way towards photonic devices that manipulate light to perform computations. From the release, " The research team began by precisely cutting a gap into a nanowire. They then pumped enough energy into the first nanowire segment that it began to emit laser light from its end and through the gap. Because the researchers started with a single nanowire, the two segment ends were perfectly matched, allowing the second segment to efficiently absorb and transmit the light down its length."

The gate works by shining light on the nanowire structure to turn on and off information transported through the wire. The research appeared this month in Nature Nanotechnology."

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Milky Way Is Twice the Size We Thought 301

Posted by kdawson
from the everything-you-know-is-wrong dept.
Peter writes to tell us about a research group at the University of Sydney in Australia, who in the middle of some calculation wanted to check the numbers everybody uses for the thickness of our galaxy at the core. Using data available freely on the Internet and analyzing it in a spreadsheet, they discovered in a matter of hours that the Milky Way is 12,000 light years thick, vs. the 6,000 that had been the consensus number for some time.

An adequate bootstrap is a contradiction in terms.