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Possible brain hormone may unlock mystery of hibernation |
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Topic: Science |
5:39 pm EDT, Apr 7, 2006 |
The discovery of a possible hibernation hormone in the brain may unlock the mystery behind the dormant state, researchers reported in the April 7, 2006 issue of Cell. Hibernation allows animals from bears to rodents to survive unscathed--in a state of suspended animation--under the harshest of winter conditions.
Possible brain hormone may unlock mystery of hibernation |
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Study Links Punishment to an Ability to Profit |
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Topic: Science |
5:32 pm EDT, Apr 7, 2006 |
Sociologists have long known that communes and other cooperative groups usually collapse into bickering and disband if they do not have clear methods of punishing members who become selfish or exploitative.
Study Links Punishment to an Ability to Profit |
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Pebble bed reactor - Wikipedia, the free encyclopedia |
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Topic: Science |
3:36 pm EST, Feb 18, 2006 |
The pebble bed reactor (PBR) or pebble bed modular reactor (PBMR) is an advanced nuclear reactor design. This technology claims a dramatically higher level of safety and efficiency. Instead of water, it uses pyrolytic graphite as the neutron moderator, and an inert or semi-inert gas such as helium, nitrogen or carbon dioxide as the coolant, at very high temperature, to drive a turbine directly. This eliminates the complex steam management system from the design and increases the transfer efficiency (ratio of electrical output to thermal output) to about 50%. Also, the gases do not dissolve contaminants or absorb neutrons as water does, so the core has less in the way of radioactive fluids and greater economy than a light water reactor.
Pebble bed reactor - Wikipedia, the free encyclopedia |
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A Shift Based on Science and Politics |
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Topic: Science |
3:25 pm EST, Feb 18, 2006 |
As a naval officer, Jimmy Carter helped design nuclear reactors for submarines. But as president, Mr. Carter banned the reprocessing of spent nuclear fuel to extract material that would be useful in reactors and bombs. Thirty years later, President Bush has proposed a new version of reprocessing.
A Shift Based on Science and Politics |
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Fossil Yields Surprise Kin of Crocodiles |
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Topic: Science |
3:51 pm EST, Jan 26, 2006 |
Scientists at the American Museum of Natural History have discovered a fossil in New Mexico that looks like a six-foot-long, two-legged dinosaur along the lines of a tyrannosaur or a velociraptor. But it is actually an ancient relative of today's alligators and crocodiles.
Fossil Yields Surprise Kin of Crocodiles |
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RE: Questions for Daniel C. Dennett |
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Topic: Science |
4:40 pm EST, Jan 22, 2006 |
noteworthy wrote: Daniel Dennett says: A lot of the evangelicals don't really care what you believe as long as you say the right thing and do the right thing and put a lot of money in the collection box.
I read a bunch of Dennett back on my last philosophy of mind kick a number of years ago. I might actually pick this one up. And I've even been thinking about having another look at Gödel, Escher, Bach which was my entry point into all of this ~9 years ago. RE: Questions for Daniel C. Dennett |
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A New Old Way to Make Diesel |
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Topic: Science |
5:42 pm EST, Jan 18, 2006 |
Even as geologists fiercely debate whether depleting oil fields can satiate intense demand for oil in the rising economies of Asia, the actions of the international energy industry may speak louder than words. Big oil is betting on once-derided unconventional energy sources, like this stranded natural gas in the Persian Gulf and remote tar deposits in Canada and Venezuela, to help meet surging demand for transportation fuel. These different types of fuels may have clunky nicknames, like G.T.L. and L.N.G. But they draw big money. Mr. Attiyah rattled off a roster of ventures with Exxon Mobil, Royal Dutch/Shell, Chevron and Sasol of South Africa to produce a new form of diesel from natural gas and said they were expected to invest more than $14 billion in capital over the next five to seven years.
A New Old Way to Make Diesel |
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USNO Astronomical Applications Department |
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Topic: Science |
7:18 pm EST, Jan 9, 2006 |
Welcome to the web pages of the Astronomical Applications Department of the U.S. Naval Observatory. Our products - almanacs, software, and web services - provide precise astronomical data for practical applications, serving the defense, scientific, commercial, and civilian communities.
Found looking for sunrise/sunset times. USNO Astronomical Applications Department |
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New Airline Navigation System Is Displayed |
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Topic: Science |
1:15 pm EST, Dec 21, 2005 |
The jet approaching Reagan National Airport followed the complicated turns required for the prescribed route over the Potomac River, banking sharply left and right as it descended smoothly toward Runway 19. But the two pilots never touched the controls. The plane was being guided by the autopilot, which was taking its cues in three dimensions, from satellites in orbit.
New Airline Navigation System Is Displayed |
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