原文刊登于《新科学家》2008年10月29日号 作者:Mark Buchanan 译者:Sunny0302 Sunny同学是我们的发文编辑,她的另一篇译文可以在这里观看 关于爱因斯坦的狭义相对论,有一件奇怪的事情是:即使其中的一个必要假设已经错了,它却仍然如此的准确。Mark Buchanan找到了质能方程(E=MC2)的阴暗面。
原文刊登于《新科学家》2008年10月29日号 作者:Mark Buchanan 译者:Sunny0302 Sunny同学是我们的发文编辑,她的另一篇译文可以在这里观看 关于爱因斯坦的狭义相对论,有一件奇怪的事情是:即使其中的一个必要假设已经错了,它却仍然如此的准确。Mark Buchanan找到了质能方程(E=MC2)的阴暗面。
原文链接 Cutting the jellyfish rings with scissors was impossibly slow; we could not produce the amount of aequorin that we needed using this technique. This problem was solved primarily by Dr. Johnson. He constructed the first model of a jellyfish-cutting machine in the summer of 1967; it was essentially a strip of wire screen that [...]
原文链接 In 1962, using the methods that had worked in the previous year, we obtained an additional amount of aequorin and began to study various aspects of the molecule, including its application in the measurement of calcium ions. We also wanted to know the mechanism of the luminescence reaction and the structure of the light-emitting [...]
原文链接 This story has three parts, Discovery of Aequorin, The Town Dock and The Jellyfish Factory. This was written by Osamu Shimomura, who discovered Aequorin and last year won the Nobel Prize of Chemistry for the discover of the Green Fluorescent Protein. Read and enjoy!! by OSAMU SHIMOMURA Marine Biological Laboratory, Woods Hole, Massachusetts Discovery [...]
原文链接 Why two eyes are better than one. By Oliver Sacks When Galen, in the second century, and Leonardo, thirteen centuries later, observed that the images received by the two eyes were slightly different, neither of them appreciated the full significance of these differences. It was not until the early eighteen-thirties that the English scientist [...]
原文链接 By Tom Bartlett Rick Friedman for The Chronicle Sanjoy Mahajan, a lecturer in electrical engineering and computer science at MIT, uses paper cones to find the relation between drag force and velocity. How much money is in a Brinks truck? A lot, certainly, assuming it's full. But is it a million? A hundred [...]
原文链接 Sanjoy Mahajan’s new book, Street-Fighting Mathematics, lays out practical tools for educated guessing and down-and-dirty problem-solving Peter Dizikes, MIT News Office Graphic: Christine Daniloff Time for some quick arithmetic: Is 3600 x 4.4 x 104 x 32 larger or smaller than 3 x 109? Finding the right answer, says Sanjoy Mahajan, associate director for [...]
原文链接 What is InnoCentive? InnoCentive is a global, online marketplace where organizations in need of innovation–companies, academic institutions, public sector, and non-profit organizations–can utilize a global network of over 160,000 of the world’s brightest problem solvers. How did InnoCentive begin? InnoCentive began as a start-up incubated through the e.Lilly division of Eli Lilly and Company-a [...]
原文链接 Sanjoy Mahajan’s new book, Street-Fighting Mathematics, lays out practical tools for educated guessing and down-and-dirty problem-solving Peter Dizikes, MIT News Office Graphic: Christine Daniloff Time for some quick arithmetic: Is 3600 x 4.4 x 104 x 32 larger or smaller than 3 x 109? Finding the right answer, says Sanjoy Mahajan, associate director for [...]
原文链接 'Through the wormhole, the scientist can see himself as he was one minute ago. But what if our scientist uses the wormhole to shoot his earlier self? He's now dead. So who fired the shot?' All you need is a wormhole, the Large Hadron Collider or a rocket that goes really, really fast Hello. [...]
原文链接 Nature 463, 878-879 (18 February 2010) Roger Bilham Roger Bilham, one of the first seismologists to visit Haiti after last month's earthquake, calls for UN enforcement of resistant construction in cities with a history of violent tremors. With an official death toll of 230,000 and thousands still buried beneath collapsed structures, the Haiti earthquake [...]
Durham astronomers' doubts about the 'dark side' 原文链接 The unresolved radio sources used by Sawangwit & Shanks to measure the effect of telescope smoothing are marked on the WMAP CMB map (open circles). Sawangwit and Shanks found that the radio sources implied stronger telescope smoothing than previously found, suggesting that the CMB ripple size may [...]
原文链接 When mathematics and biology met on a mountain Nature 427, 491 (5 February 2004) Martin A. Nowak Once a year, the theoretical chemist Peter Schuster took his students from the University of Vienna to a small house in the Austrian mountains. During the day we skied, of course, but in the evening the emphasis [...]
Amphibians wiped out before they are discovered 原文链接 Fungal disease drives the loss of 30 species in Panama. Janet Fang The Panamanian golden frog(Atelopus zeteki)is one of many species being decimalted by chytridiomycosis. Alberto Aparicio/XinHua/Xinhua Predss/Corbis A Panamanian park has lost around 40% of its amphibian species in the past decade, with some dying out [...]
原文链接 If one measured the influence of a mathematician by the number of mathematical ideas that bear their name then John Tate would be a clear winner. Tate cohomology, the Tate duality theorem, Barsotti-Tate groups, the Tate motive, the Tate module, Tate’s algorithm, the Néron-Tate height, Mumford-Tate groups, the Tate isogeny theorem, the Honda-Tate theorem [...]