Stan Ulam, a mathematician who figured how to initiate fusion

That’s Maths: from the Manhattan Project to the Monte Carlo method

Ulam played a seminal role in the development of the H-bomb

房地产投资价值指数回升加速 下跌城市数减少


Stanislaw Ulam, born in Poland in 1909, was a key member of the remarkable Lvov School of Mathematics, which flourished in that city between the two world wars. Ulam studied mathematics at the Lvov Polytechnic Institute, getting his PhD in 1933. His original research was in abstract mathematics, but he later became interested in a wide range of applications. He once joked he was “a pure mathematician who had sunk so low that his latest paper actually contained numbers with decimal points”.

In the preface to his autobiography, Adventures of a Mathematician, Ulam expressed his surprise at how “a few scribbles on a blackboard or on a sheet of paper could change the course of human affairs”. This was starkly illustrated by his work on atomic weapons. In 1935, John von Neumann met Ulam in Warsaw and invited him to visit the Institute for Advanced Study in Princeton, New Jersey. In 1944, Ulam was recruited to work on the Manhattan Project. He remained at Los Alamos after the war and played a seminal role in the development of the H-bomb. He discovered a way to initiate nuclear fusion, originating the Teller-Ulam design for thermonuclear weapons.

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Trium跃升3名,击败由凯洛格管理学院(Kellogg School of Management)与香港科技大学(HKUST)联合推出的课程,后者多年来一直高居排行榜榜首。这是Trium首次登上排行榜榜首,也是14年来第四个登上榜首的课程。
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A. O. Scott
Wheel skates look somewhat like regular inline skates, except that the wheels are much larger, up to the size of bicycle tires. They are seen as a cross between an inline skate, a ski, and a bike. Recently, a company called Chariot Skates said they had come up with something unique—the Chariot wheel skates. According to the company, wheel skates are "revolutionary new skating products." Revolutionary? They do at least revolve. New? No. The first wheel skate was made more than 142 years ago.
May the season\'s joy fill you all the year round.
Yu Xiuhua
《在巴基斯坦的争斗中,玛丽亚姆·谢里夫正处在权力的边缘,也或许是监狱》(In Pakistani Fray, Maryam Sharif Is on the Edge of Power, or Prison)

An evaluation report on the "Double Eleven" (singles' day) shopping spree has been released in Beijing, offering insights into China's largest annual online shopping event.
雇主因种族、肤色、性别、国籍、宗教、年龄或残疾而歧视员工属于违法行为。但美国多数州至今依然不保护LGBT群体的工作权益。苹果公司CEO蒂姆库克希望消除这种差异。11月份,库克在《华尔街日报》(Wall Street Journal )评论版对页发表了题为《平等就业对企业有益》(Workplace Equality Is Good for Business)的文章,敦促联邦立法,以免就业者因性取向而受到歧视。
雇主因种族、肤色、性别、国籍、宗教、年龄或残疾而歧视员工属于违法行为。但美国多数州至今依然不保护LGBT群体的工作权益。苹果公司CEO蒂姆库克希望消除这种差异。11月份,库克在《华尔街日报》(Wall Street Journal )评论版对页发表了题为《平等就业对企业有益》(Workplace Equality Is Good for Business)的文章,敦促联邦立法,以免就业者因性取向而受到歧视。
The second half of this year should see a similar number of IPOs, making a total of about 120 cases in 2016 with about 60 billion to 80 billion yuan in financing volume, Lyn predicted.

With Enrico Fermi and John Pasta, Ulam studied a simple mechanical problem of a line of masses linked by springs. They anticipated that the energy would be rapidly distributed to all possible modes of vibration. Instead, they found the system returned periodically to its initial state. Such behaviour is different from the expected equipartition of energy. The Fermi-Pasta-Ulam (FPU) problem became a standard example of recurrence in the field of nonlinear science. This work has been described as “the birth of experimental mathematics”.

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I'm amazed that Durant didn't get broken in half back in high school, weighing in at 6'9'', 185 lbs. Lucky for Durant, he doesn't make his money banging against big forwards. He relies on his nasty quick-shot jumper.
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China had a full-year GDP target of “around 6.5 per cent” for 2017.

Peter Lynch is emeritus professor at UCD School of Mathematics & Statistics – be blogs at