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In another feat of bioengineering, Caltech's Frances Arnold, the Linus Pauling Professor of Chemical Engineering, Bioengineering and Biochemistry, and her team have created bacteria that can, for the ...
An accurate analog clock tick-tick-ticks with a constant precision and well known frequency: one tick per second. The longer you let it tick, the better to test its accuracy — 10 times as long corresp...
A seasonal flu shot is a bit like a local weather forecast: Based on the conditions elsewhere and the direction of the prevailing wind, a meteorologist can give the public a pretty good idea of what t...
Scientists at Indiana University have modified a plant gene that normally fights bacterial infection to confer resistance to a virus.The method, described in a paper to be published Feb. 12 in the jou...
Bounds from a Card Trick     Bounds  Card Trick       2010/11/24
We describe a new variation of a mathematical card trick, whose analysis leads to new lower bounds for data compression and estimating the entropy of Markov sources.
Ulysses scores a hat-trick(图)     solar latitude       2007/2/12
7 February 2007,Today the joint ESA-NASA Ulysses mission has marked another high point in its mission. For the third time in a long and highly successful career, Ulysses has reached its maximum south ...

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