2009年7月31日 星期五

Herbert Ellis Robbins

1989 NTU Review had a translation of an interview


(1917–2001; b. Newcastle, PA; d. Princeton, NJ) American mathematical statistician. Robbins obtained his PhD from Harvard U in 1938. After a spell in the United States Navy, he joined Hotelling at UNC. In 1952 he moved to Columbia U where he spent the rest of his career. He was the Neyman Lecturer of the IMS in 1982, having been its Rietz Lecturer in 1963, its President in 1965, and its Wald Lecturer in 1969. He was the COPSS Fisher Lecturer in 1993. He was elected to membership of both the NAS and the AAAS.


Herbert Ellis Robbins (January 12, 1915 in New Castle, PennsylvaniaFebruary 12, 2001 in Princeton, New Jersey) was a mathematician and statistician who did research in topology, measure theory, statistics, and a variety of other fields. He was the co-author, with Richard Courant, of What is Mathematics?, a popularization that is still (as of 2007) in print. The Robbins lemma, used in empirical Bayes methods, is named after him. Robbins algebras are named after him because of a conjecture (since proved) that he posed concerning Boolean algebras. The Robbins theorem, in graph theory, is also named after him. The well-known unsolved problem of minimizing in sequential selection the expected rank of the selected item under under full information, sometimes referred to as the fourth secretary problem, also bears his name: Robbins' problem (of optimal stopping).

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Biography

As an undergraduate, Robbins attended Harvard University, where Marston Morse influenced him to become interested in mathematics. Robbins received a doctorate from Harvard in 1938 and was an instructor at New York University from 1939 to 1941. After World War II, Robbins taught at the University of North Carolina at Chapel Hill from 1946 to 1952, then spent a year at the Institute for Advanced Study. In 1953, he became a professor of mathematical statistics at Columbia University. He retired from full-time activity at Columbia in 1985 and was then a professor at Rutgers University until his retirement in 1997.

In 1955, Robbins introduced empirical Bayes methods at the Third Berkeley Symposium on Mathematical Statistics and Probability. Robbins was also one of the inventors of the first stochastic approximation algorithm, the Robbins-Monro method, and worked on the theory of power-one tests and optimal stopping.

Selected writings

  • A theorem on graphs with an application to a problem on traffic control, American Mathematical Monthly, 46:281-283, 1939.
  • What is Mathematics?: An elementary approach to ideas and methods, with Richard Courant, London: Oxford University Press, 1941.
  • The central limit theorem for dependent random variables, with Wassily Hoeffding, Duke Mathematical Journal 15 (1948), pp. 773–780.
  • A stochastic approximation method, with Sutton Monro, Annals of Mathematical Statistics 22, #3 (September 1951), pp. 400–407.
  • An empirical Bayes approach to statistics, in Proceedings of the Third Berkeley Symposium on Mathematical Statistics and Probability, Jerzy Neyman, ed., vol. 1, Berkeley, California: University of California Press, 1956, pp. 157–163.

References

  • "The Contributions of Herbert Robbins to Mathematical Statistics", Tze Leung Lai and David Siegmund, Statistical Science 1, #2 (May 1986), pp. 276–284. Euclid
  • In Memoriam, ISI Newsletter 25, #3 (2001)
  • "What is known about Robbins' Problem?", F. Thomas Bruss, Journal of Applied Probability Volume 42, #1 (2005), pp. 108–120 Euclid
  • "A continuous-time approach to Robbins' problem of minimizing the expected rank", F. Thomas Bruss and Yves Coamhin Swan, Journal of Applied Probability , Volume 46 #1, 1–18, (2009).

External links

2009年7月30日 星期四

The Shaw Prize

有錢設獎卻不過餌爾爾


邵逸夫獎英文The Shaw Prize)由香港著名的電影製作人邵逸夫爵士於2002年11月創立。首屆的頒獎禮在2004年9月7日在香港舉行。邵逸夫獎基金會每年選出世界上在數學醫學天文學三方面有成就的科學家,頒授一百萬美元獎金以作表揚。並設有天文學獎、生命科學與醫學獎、數學科學獎,共三個獎項;它是個國際性獎項,形式模仿諾貝爾獎,由邵逸夫獎基金會有限公司作管理。

The Shaw Prize

2009年7月25日 星期六

保时捷“维德金“时代划上句号

德国经济 | 2009.07.25

保时捷“维德金“时代划上句号

在保时捷总裁维德金被迫离职后,德国经济史上的一场史无前例的权力争夺战,也随之偃旗息鼓。大众汽车和保时捷的合并计划目前已经获得大众公司监理会的批准。大众集团表示,合并后保时捷将保留最大的自主权。这种结局让博弈双方都犹如卸下了重负,双方都表示满意。

在保时捷和大众的这场权力争夺战终于画上句号时,对立双方都对最终达成的结果表示满意。下萨克森州州长乌尔夫同大众公司一样,充满了得胜的喜悦。乌尔夫表示:"对于保时捷和大众这两家公司来说, 对于这两家股份公司来说,合并是一件好事。双方都可以从中受益。"

大众公司总裁温特克尔在公司监事会举行会议,批准了同保时捷合并的计划后兴奋地说:"我们将依靠我们的技术优势一道向前迈进,我们将在国际市场上创造更加辉煌的业绩。"

失败的一方保时捷也称,合并是个不错的解决办法。就连被迫辞职的保时捷CEO维德金在正式辞职后数小时也表示:"如果说今后的计划是要打造一个大型康采恩的话,那么我必须要说的是,这原本就是我们公司的战略,因此这个决定是正确的。"

至于维德金说这番话究竟有多少诚意,这个问题可以暂且搁置一边,但维德金得到了5千万欧元的离职补偿费却是事实。由于维德金在斯图加特保时捷公司享 有崇高威望,企业职工委员会主席乌韦·绪克宣布,为这位德国薪金最高的CEO举办一个隆重的欢送仪式。绪克宣布:"我们将为维德金博士举行一个盛大的内部 欢送仪式。”

新开端Bildunterschrift: 新开端

合并后在大众公司旗下,保时捷仍将保留自己的品牌和在斯图加特祖芬豪森的总部。下萨克森州州长乌尔夫强调说:"我们大家都知道,保时捷这个品牌简直象个神话,因此我们要继续培养和发展这个品牌。保时捷将是个拥有高度自主权的企业。"

这个消息对于保时捷公司的800多名员工来说,无疑是个重要的消息。由于收购大众汽车股份保时捷欠下了100亿欧元的债务。员工代表表示:"希望我 们的就业岗位能够保留下去。希望我们的公司能够继续运作下去。我相信,我们公司能够保持高度自主权的这个消息,会让公司里的所有人感到高兴。对于我们,对 于公司的所有工作人员,对于公司来说,这场争夺战终于能够找到一条出路,平静下来是件好事情。"

到8月中旬之前将出台一个基本协议。其中将包括卡塔尔成为大股东并将注资50亿欧元的内容。这意味着德国历史上规模最大的权力争夺战的平息,也意味着保时捷维德金时代的终结。维德金表示:"这让我感到十分难过。但尽管如此,我们也不得不遗憾地划上一个句号。"


作者:Knut Bauer/韩明芳

责编:石涛

2009年7月9日 星期四

「KJ法」の川喜田二郎さん死去

「KJ法」の川喜田二郎さん死去


川喜田二郎さん

 ユニークな発想法「KJ法」の創始者で、ヒマラヤなどの学術調査で知られる文化人類学者の川喜田二郎(かわきた・じろう)氏が8日、死去した。

 89歳だった。告別式は親族のみで行い、後日お別れ会を開く予定。

 三重県生まれ。京大に進み、山岳部に籍を置く。人類学者の今西錦司の薫陶を受け、野外調査に取り組んだ。卒業後は東工大などの教授を歴任した。

 専門は文化人類学、民族地理学。1953年にマナスル登山隊に参加して以来、ネパール、ヒマラヤの現地調査を続け、「鳥葬の国」などのノンフィク ションから「素朴と文明」といった独自の文明論まで、幅広く手がけた。その一方で、環境保護や、ネパールにふさわしい形の技術協力を進め、アジアのノーベ ル賞といわれるマグサイサイ賞なども受けている。

 また、ユニークな発想・情報整理法で、世界で高く評価されている「KJ法」を考案、自ら普及につとめた。他の著書に「発想法」「チームワーク」など。

2009年7月9日14時52分 読売新聞)