Palaeobotany in UK 英国古气候学家、古植物学家 David John Beerling 教授 (FRS, 1965--) 曾跟随 William Gilbert Chaloner 教授 (FRS, 1928--) 从事博士后研究。 David John Beerling 教授供职于 University of Sheffield 。 2014 年 4 月 30 日， David John Beerling 教授当选为英国皇家学会院士 Cited from http://en.wikipedia.org/wiki/David_Beerling （ 1 ） Education Beerling was educated at University of Wales, College of Cardiff where hewas awarded a Bachelor of Science degree in Botany in 1987 followed by a PhD in 1990 for research into the ecology and control of Japanese Knotweeed and Himalayan Balsam （ 2 ） Key Research Interests Beerling's research group conduct research to address fundamental questions about the behaviour of biotic and physical systems on Earth over the past 540million years . Beerling's research has been funded by the Natural Environment Research Council(NERC) D. J. Beerling’s interdisciplinary research group focuses on fundamental questions concerning how photosynthetic terrestrial ecosystems and the global environment co-evolved over the last half billion years. Their approach integrates evidence from fossils, experiments with terrestrial organisms, and rigorous theoretical models applied across spatial scales. They focus particularly on key processes and interactions important for revealing insights into the conquest of the land by plants, and the role of terrestrial ecosystems in shaping global ecology, climate and atmospheric composition.Their research findings also inform understanding of current anthropogenic climate change issues facing humanity. (3) Career/appointments 2014 Elected Fellow of the Royal Society 2009–2014 Royal Society-Wolfson Research Merit Award holder 2002– Appointed to a Personal Chair, University of Sheffield 2008–2009 Edward P. Bass Distinguished Visiting Environmental Scholar (YaleUniversity) 2001–2003 Philip Leverhulme Prize holder 1994–2002 Royal Society University Research Fellow, University of Sheffield 1990–1993 Post-doctoral research associate. (×2, NERC, EU) 1990 PhD (botany), University of Wales, College of Cardiff 1987 Honours Botany, University of Wales, College of Cardiff (4)Publications Beerling is the author of Vegetationand the terrestrial carbon cycle: the first 400 million years , The Emerald Planet: How plants changedEarth's history and was series consultant for the BBC television series Howto Grow a Planet . Books Beerling, D.J. (2007) TheEmerald Planet. How plants changed Earths history . OxfordUniversity Press, Oxford. Beerling, D.J. Woodward, F.I. (2001) Vegetationand the terrestrial carbon cycle . Modelling the first 400 million years .Cambridge University Press. RecentEdited Volumes Beerling, D.J. (editor) (2012) Atmospheric CO2 and the evolution ofphotosynthetic eukaryotes: from enzymes to ecosystems . Philosophical Transactionsof the Royal Society, B367, 477-629. Beerling, D.J. (editor) (2009) Coevolution of photosyntheticorganisms and the environment . Geobiology , 7, 97-264. Beerling, D.J. , Hewitt, C.N., Pyle, J.A. Raven, J.A. (editors)(2007) Trace gas biogeochemistry and global change . Philosophical Transactionsof the Royal Society , A365, 1627-1954. SelectedRecent Scientific Papers (since 2008) Franks, P.J., Royer, D.L., Beerling, D.J. , Van de Water,P.K., Cantrill, D.C., Barbour, M.M. Berry, J.A. (2014) New constraints onatmospheric CO 2 for the Phanerozoic. Geophysical Research Letters , 41 , 4685-4694 Doughty, C.E., Taylor, L.L., Girardin, C.A.J., Malhi,Y. Beerling, D.J. (2014) Montane forest root growth and soil organic layer depth as potentialfactors stabilizing Cenozoic global change. Geophysical Research Letters , 41 , 983-990 Quirk, J., Andrews, M.Y., Leake, J.R., Banwart, S.A. Beerling, D.J. (2014) Ectomycorrhizal fungi and past high CO 2 atmospheres enhancemineral weathering through increased below-ground carbon-energy fluxes. Biology Letters , 10 (7) ,doi:10.1098/rsbl.2014.0375 Warszawski, L. etal . (2013) A multi-model analysis of ecosystem shifts underclimate change. EnvironmentalResearch Letters , 8 ,044018. Chater, C., Gray, J.E. Beerling, D.J. (2013) Earlyevolutionary acquisition of stomatal control and development gene signallingnetworks. Current Opinion inPlant Biology , 16 ,638-646. Quirk, J., McDowell, N.G., Leake, J.R., Hudson, P.J. Beerling, D.J. (2013) Increased susceptibility to drought-induced mortality in Sequoia sempervirens (Cupressaceae) trees under Cenozoic atmospheric carbon dioxide starvation. American Journal of Botany , 100 , 582-591. Hansen, J. etal . (2013) Assessing dangerous climate change:required reduction of carbon emissions to protect young people, futuregenerations and nature. PLoS ONE , 8 , e81648. Previdi, M. etal . (2013) Climate sensitivity in the Anthropocene. Quartely Journal of the Royal MetorologicalSociety , 139 ,1121-1131. Palaeosense Project Members (2012) Making sense ofpalaeoclimate sensitivity. Nature , 491 , 683-691. Quirk, J., Beerling,D.J. , Banwart, S.A., Kakonyi, G., Romero-Gonzalez, M.E. Leake, J.R. (2012) Evolution of trees and mycorrhizal fungi intensifiessilicate mineral weathering. BiologyLetters , 8 ,1006-1011. DeConto, R.M., Galeotti, S. Pagani, M., Tracy, D.,Schaefer, K., Zhang, T., Pollard, D. Beerling, D.J. (2012) Past extreme warming eventslinked to massive carbon release from thawing permafrost. Nature, 484 , 87-91. Field, K.J., Cameron, D.C., Leake, J.R., Tille, S.,Bidartondo, M. Beerling,D.J. (2012) Contrasting arbuscular mycorrhizal efficiencyresponses of vascular and non-vascular land plants to a simulated PalaeozoicCO2 decline. NatureCommunications , 3 ,835, 10.1038/ncomms1831. Chater, C., Kamisugi, Y., Movahedi, M., Fleming, A.,Cuming, A.C., Gray, J.E. Beerling,D.J. (2011) Regulatory mechanism controlling stomatal behaviourconserved across 400 million years of land plant evolution. Current Biology , 21 , 1025-1029 . Franks, P.J., Leitch, I.J., Ruszala, E.M.,Hetherington, A.M. Beerling,D.J. (2012) Physiological framework for adaptation of stomatato CO2 from glacial to future concentrations. Philosophical Transactions of the Royal Society , B367 , 537-546. Beerling, D.J. , Fox, A., Stevenson, D.S. Valdes, P.J. (2011)Enhanced chemistry-climate feedbacks during past greenhouse climates. Proceedings of the NationalAcademy of Science, USA, 108, 9770-9775. Boardman, C.P., Gauci, V., Watson, J.S., Blake, S. Beerling, D.J. (2011) Contrasting wetland CH4 emission responses to simulated glacialatmospheric CO2 in temperate bogs and fens. New Phytologist , 192, 898-911. Singarayer, J.S., Valdes, P.J., Friedlingstein, P.,Nelson, S. Beerling, D.J. (2011) Late-Holocene methane rise caused by orbitally controlled increase intropical sources. Nature , 470 , 82-85. Beerling, D.J. Royer, D.L. (2011) Convergent Cenozoic CO2history. Nature Geoscience, 4 , 418-420. Humphreys, C.P., Franks, P.J., Rees, M., Bidartondo,M.I., Leake, J.R. Beerling,D.J. (2010) Mutualistic mycorrhiza-like symbiosis in the mostancient group of land plants. Nature Communications , 1 , 103 doi:10.1033/ncomms1105. Berry, J.A., Beerling,D.J. Franks, P.J. (2010) Stomata: key players in theEarth system, past and present. Current Opinion in Plant Biology , 13, 233-240. Beerling, D.J . Franks, P.J. (2010) The hidden cost oftranspiration . Nature , 464 , 495-496. Pagani, M., Caldeira, K., Berner, R.A., Beerling, D.J. (2009) The roleof terrestrial vegetation in limiting atmospheric CO2 decline over the past 24million years. Nature , 460, 85-88. Franks, P.J. Beerling, D.J. (2009) Maximum leaf conductancedriven by atmospheric CO2 effects on stomatal size and density over geologictime. Proceedings ofthe National Academy of Scienc e, USA, 106 , 10343-10347. 资料来自： https://royalsociety.org/about-us/fellowship/new-fellows-2014/ https://royalsociety.org/people/fellowship/2014/david-beerling/ https://www.shef.ac.uk/aps/staff-and-students/acadstaff/beerling http://en.wikipedia.org/wiki/David_Beerling Seward umbrella of world palaeobotany http://blog.sciencenet.cn/blog-225931-845010.html 2014-11-21 00:13 《古植物学的故事》（英国专辑） Storyof Palaeobotany Series (special issue for British palaeobotany) http://blog.sciencenet.cn/blog-225931-411212.html http://bbs.sciencenet.cn/home.php?mod=spaceuid=225931do=blogquickforward=1id=411212 2011-2-8 22:00 ================= 本期编目 古植物学的故事 293 期 Story of Palaeobotany Series (No.293) 《英国专辑》 (补充之九) 英国皇家学会新科院士、古气候学家、古植物学家 David John Beerling 教授 British palaeoclimatologist and palaeobotanist, David JohnBeerling (FRS) http://blog.sciencenet.cn/blog-225931-864768.html 2015-2-2 03:20
已故 美国 科学院院士、古植物学家 David White (1862--1935) ： 从绘图员到学术领袖 David White (1862--1935) 学术界的院士之称谓原本是一种荣誉性的学术称号。拥有院士头衔的专家、学者理应是同行和青年学生的榜样（ role model ）。已故美国科学院院士 David White (1862---1935) 生前供职于美国联邦地质调查局 (The United States Geological Survey--USGS) 长达 49 年之久，他从职位很低的绘图员（ draftsman ）干起，终成一代学术领袖。 David White 的学术研究领域非常广泛，包括古植物学、煤地质学和石油地质学等。 1903--1935 年， David White 曾在史密松研究院 (The Smithsonian Institution, Washington D.C.) 的美国国家博物馆 (The United States National Museums--USNM) 兼职，主要负责植物化石的管理和研究。现在的美国国家自然历史博物馆（ The Smithsonian National Museum of Natural History--NMNH ）脱胎于 USNM 。 (1) 教育背景 1862 年， (Charles) David White 出生于 纽约。 1882 年 ）， David White(1862--1935) 到康奈尔大学求学。康奈尔校园下伏泥盆纪地层 ， 页岩里有泥盆纪植物化石。 David White 在康奈尔学习期间采集了很多植物化石。 1886 年，他完成了一篇关于泥盆纪植物化石 — Ptilophyton 的毕业研究论文。 White, (Charles) David (1862--1935), 1886. (Seniorthesis) . On the nature and systematic classification of Ptilophyton vanuxemi Dawson. Cornell University. 另外， David White 在康奈尔认识了一位文科女同学 --Mary Elizabeth Houghton(1856--1936) 。 1888 年，他们结婚。 (2)USGS 岁月 康奈尔大学地质古生物教授 Henry Shaler Williams (1847--1918) 是 David White 的伯乐，他发现了 David White 的才干。 1886 年， Henry Shaler Williams 推荐 David White 到美国联邦地质调查局跟随著名地质学家、古植物学家和社会学家 Lester F.Ward(1841--1913) 工作。关于 Lester F. Ward ，参见： Umbrella of American palaeobotany—1 3 : Lester Frank Ward （ 1841--1913 ）：美国社会学之父 美国古植物学启蒙者 http://blog.sciencenet.cn/blog-225931-846331.html David White 刚到美国联邦地质调查局的工作是在 Lester F. Ward 手下担任 绘图员。 1905 年， LesterF. Ward 辞掉美国联邦地质调查局的工作。 David White 曾担任美国联邦地质调查局的首席地质学家（ chief geologist of USGS ），领导美国石油、天然气的勘探工作。 (3) 学术荣誉和地位 1894 年， David White 当选为德国科学院 (German Academy of Sciences Leopoldina) 院士。 1912 年当选为美国科学院院士。 1931—1933 年担任美国科学院副院长。 关于 David White 的生平和学术成就，参看以下文献： 美国科学院院士 Charles Schuchert (1858--1942) 撰写的 David White 回忆录-- white-david.pdf ; Paul C. Lyons 和 Elsie Darrah Morey 撰写的文章 --- Paul C. Lyons, Elsie Darrah Morey, 1995. David White (1862--1935): American plaeobotanist and geologist. In: Lyons P.C., Morey E. D. Wagner R. H.(eds.). Historical Perspective of Early Twentieth Century Carboniferous Paleobotany in North America (W. C. Darrah volume), 135-148, Geological Societyof America Memoir 185, Boulder, Colorado. (孙启高 2014 年 12 月 20 日) --------------- 古植物学的故事 259 期 Story of Palaeobotany Series (No.2 59 ) Umbrella of American palaeobotany— 65 : 已故 美国 科学院院士 David White (1862---1935) ：从绘图员到学术领袖 David White (NAS,1862--1935):From humble draftsman to profession leader http://blog. sciencenet.cn/blog-225931-852671.html 2014-12-2102:53 --------------- 相关阅读： Charles David White http://en.wikipedia.org/wiki/David_White_(geologist) 为何美国联邦地质调查局的植物化石必须存放在美国国家自然历史博物馆？ Why should the collections of the U.S. G.S. be deposited in the USNM? http://blog.sciencenet.cn/blog-225931-826356.html 美国科学院的古植物学院士与外籍院士 Members and foreign associates of National Academy of Sciences (USA) regarding palaeobotany http://blog.sciencenet.cn/blog- 225931-327253.html 以 360 年来德国科学院涉及古植物学研究的院士们 Members of the German Academy of Sciences Leopoldina pertaining to the palaeobotanical studies since 1652 http://blog.sciencenet.cn/blog-225931-575639.html http://blog.sciencenet.cn/home.php?mod=spaceuid=225931do=blogquickforward=1id=575639
最近连续接待了3位专家的来访： 美国 加州大学的Robert Dudley教授（ 加州大学Robert Dudley教授来访学术报告 ）、德国弗赖堡大学的Michael Staab博士（研究助理）（ Michael Staab博士来访学术报告 ）和美国佐治亚理工学院的David Hu博士（副教授）（ 蚁舟渡水等现象的生物动力学研究 - David HU博士来访学术报告 ）。他们三 位专家都有一个共同的特点，对大自然和生 物学现象充满了持久的好奇心，有非常独到的发现，并乐于将自己的研究成果及时向公众科普。其中David的报告被面向小朋友的美国科普杂志报道。 Robert和我联系有段时日，他对飞行、酗酒等开展行为和演化生物学研究；Michael和我研究组研究亚热带森林传粉蜜蜂物种多样性和传粉功能的研究工作，却意外地发现了同样利用芦苇管筑巢的独特护巢现象；David的兴趣更加广泛，但主线是用应用数学和流体力学思路剖析了蚁筏等多种有趣的生物学现象。 David从媒体和PLoS ONE上得知蚁墙蜂的报道后，就邮 件联系了我，看看近期他来北京能否见面交流一下。他在MIT曾经研究水面活动的节肢动物，并发表了2篇Nature论文（Hu, Chan, Bush, 2003; Hu, Bush, 2005)）。当时我在英国，曾经阅读过他们2003年的Nature论文。收到他的邮件后，我立即安排了7月18日的会议室，希望他能过来讲讲他最近的研究进展。 David邮件中希望做1.5个小时的报告，并希望每个学生能够带纸和笔，就数学和力学做几道测试。由于接待来访比较多，40分钟报告的占多数；也很少有专家提出在报告过程中进行测试。由于各种原因，David18日凌晨4点才到达他亲戚家，9：30多才赶到所里。我再次告知他，我们攻读动物学的学生，特别是昆虫学的研究生，大部分不太擅长高等数学或力学，或者以前学得不错，现在已经把大多数基础知识换给了老师。 10：00-11：45左右的报告，David做得非常精彩。除了漂亮的PPT，他还充分使用了白板，进行现场公式推研。研究生们也在他的带动下，进行了良好的互动。上午，动物研究所肖治术研究员、葛斯琴副研究员、我和多个研究组的研究生听取了报告，并积极参与了讨论；下午David和张建旭研究员、王宪辉研究员、葛斯琴副研究员和陈立副研究员等进一步探讨了合作的可能性。 我个人感觉受益匪浅。生物系统非常复杂，有趣的生物学现象几乎无处不在。我们的学生要敢于提出问题，大胆表达自己对生物现象的好奇心，提出自己的问题。有些提问在细究和解决之前可能显得比较“幼稚”，但是为什么不先认真地好奇一下呢？我喜欢听各种报告，也喜欢提出不同的问题。有些问题可能在别人看来不够大、不好玩，但是我自己觉得好玩、有趣就开了个好头。再小的问题，也可以涓涓细流，汇成大海。美国自然历史博物馆的Jim Carpenter博士1997年访问动物所的时候，我请教他关于Hennig86和NONA的问题的时候，他就说我要play your own sciences。 好奇心是一个良好的开端。能否有足够的基础知识和技能来提出自己独特的方案，科学地剖析自己提出的问题，并给出一个普遍存在问题的答案（之一）？David在雨中飞蚊的科普视频（ How Mosquitoes Fly in the Rain (English) ）给出了非常好的想法。尽管我把高等数学和力学的很多基础知识已经还给了我的高中和大学老师，但是，我感觉David在MIT本科和博士的背景给了他交叉学科发展有力的支持。现在的同学，能否在钻进昆虫学和动物学，深究生物学现象的同时，把自己曾经特别喜欢的数学、物理、化学等不同学科的公式，和自己研究的对象联系起来？有了问题、基本的思路和预期的数据，就可以寻找合适的导师、拥有仪器和设备的实验室，获取必要的数据。 David的联系方式： Dr. David L. Hu Associate Professor of Mechanical Engineering and Biology, Adjunct Associate Professor of Physics (photo by Candler Hobbs) The George W. Woodruff School of Mechanical Engineering e-mail : hu@me.gatech.edu Phone : 4 04 894 0573 Office : LOVE 007, the basement of 801 Ferst Drive. Lab : LOVE 224 Mailing address: Georgia Institute of Technology Woodruff School of Mechanical Engineering ATTN: David Hu 771 Ferst Dr. Love 120 Atlanta, Ga. 30332
David HU博士发过来的情况介绍中，添加了他研究工作成果的一些视频（ http://hu.gatech.edu ）。这些视频通俗地介绍了他几个有趣的发现。但是这些视频难以直接打开。由于科学网不能直接上载视频，我把搜到的几个视频上传到腾讯视频，和感兴趣的朋友、同事和学生分享。 1、雨中飞蚊， How Mosquitoes Fly in the Rain (English) Dickerson, A., Shankles, P., Madhaven, N., Hu, D. L. (2012) Mosquitoes survive raindrop collisions by virtue of their low mass. Proceedings of the National Academy of Sciences, USA . 109 (25) 9822-9827. 2、犬摆脱水， Wet Dog Shaking in Slow Motiontion Dickerson, A., Mills, Z. Hu, D. L. (2012) Wet mammals shake at tuned frequencies to dry. Journal of the Royal Society Interface 3、蚁筏渡江， Ant Rafts Mlot,N., Tovey, C. Hu, D.L. (2011) Fire ants self-assemble into waterproof rafts to survive floods. Proceedings of the National Academy ofSciences, USA . 108: 7669-7673. Foster, P. C., Mlot, N. J., Lin, A. and Hu, D. L. (2014). Fire ants actively control spacing and orientation within self-assemblages. Journal of Experimental Biology 217, 2089-2100. 4、蛇行天下， Discovery-snakes Marvi, H. Hu, D. L. (2012) Friction enhancement in concertina locomotion of snakes. Journal of the Royal Society Interface. 5、 The Other Golden Rule Yang, P.J., Pham, J., Choo, J., Hu, D.L. (2014) Duration of urination does not change with body size. Proceedings of the National Academy of Sciences, USA.
学术报告 Ant Rafts, Wet-dog Shaking and Urination: A Tutorial on Scaling Principles for Biologists 邀请人：朱朝东 研究员 报告人： Dr. David HU Associate Professor of Mechanical Engineering and Biology Adjunct Associate Professor of Physics The George W. Woodruff School of Mechanical Engineering 报告时间： 2014 年 7 月 18 日，上午 10 ： 00-12 ： 00 报告地点：中国科学院动物研究所E 112 欢迎各位老师同学参加！ 附：相关信息： Abstract We present a 1.5-hourtutorial on modeling tools used in a series of PNAS papers (2011, 2012, 2014) onbiological systems. In the first part, we use probability theory anddifferential equations to model how ants link their bodies together to buildrafts and towers. In the second part, weuse fluid mechanics and scaling principles predict the flow rate of the bladderacross a range of animal sizes. Scaling principles in particular can be learned across disciplines, from biologists to engineers. The audience will learn howto iterate between simple table-top experiments and theoretical analyses untila consistent physical picture emerges. Several in-class exercises will train students to apply these principles in their own scientific work. Biography Dr. David Hu is a mechanical engineer who studies the movementof animals. He has studied how snakes slither, how insects walk on water, andhow small insects fly through rain. His laboratory has invented new animal-like robots such as Robostrider which walks on water and Scalybot, which moves by virtue of its belly scales. He lives in Atlanta, Georgia USA with his wife Jia and children, Harry and Heidi. Hu is an Assistant Professor of Mechanical Engineering and Biology and Adjunct Professor of Physics at Georgia Institute of Technology. His degrees are in mechanical engineering and mathematics at M.I.T. and his postdoctoral work was at NYU. He has published in Nature , PNAS, Physics Today and American Scientist , and his work been featured in The Economist , The New YorkTimes , The Washington Post, USAToday, National Geographic, Popular Mechanics, Audobon, Smithsonian, Scholastic ,and others. He has been invited guest on Good Morning America, Discovery Channel , National Public Radio, and in the film Fire Ants 3D: The Invincible Army , available on NetFlix. These videos and more may be found at his website, Hoogleat http://hu.gatech.edu References: (1) Yang,P.J., Pham, J., Choo, J., Hu, D.L. (2014) Duration of urination does not change with body size. Proceedings of theNational Academy of Sciences, USA. (2) Dickerson,A. , Shankles, P., Madhaven, N., Hu, D. L. (2012) Mosquitoes survive raindrop collisions by virtue of their low mass. Proceedings of the National Academy of Sciences, USA. 109 (25) 9822-9827. (3) Mlot,N. , Tovey, C. Hu, D.L. (2011) Fire ants self-assemble into waterproof rafts to survive floods. Proceedings of the National Academy ofSciences, USA. 108 : 7669-7673.
很久没有写勃拉姆斯了，工作忙，私事也忙，哈！ 不过，痛苦孤独的时候还是经常的。没办法，是经常。这样的时候，就只好听听他的音乐了。 比如听他的A大调第二号小提琴奏鸣曲，就是享受一下爱抚吧！ 我喜欢的是 David Oistrakh的演奏 ，姜是老的辣。http://www.youtube.com/watch?v=n4n9kUbzmGY 没时间写，就抄一点吧： Sonata Op. 100 (1886) 1. Allegro amabile 2. Andante tranquillo - Vivace - Andante - Vivace di piu - Andante - Vivace 3. Allegretto grazioso (quasi andante) Brahms spent the summer of 1886 at his favorite retreat at Lake Thun, near Interlaken in Switzerland. There he concentrated on writing lieder and chamber works, among them his second cello sonata (F Major, Op. 99), the second violin sonata (A Major, Op. 100) and the third piano trio (C minor, Op. 101) The A Major Sonata is probably the most lyrical of Brahms's three sonatas for violin and piano. The reigning characteristics of the second violin sonata reflect Brahms's personality - his shyness and introspection, his originality and his intensity, sometimes all at once. The work transports the listener into the private world of its creator. The sonata begins with a direct and immediate theme, first presented by the piano and then taken up by the violin. Serving as an antecedent to the dramaturgical line that is to unfold in the rest of the piece, the melody is sweet in its simplicity and powerful in spite of its lack of bombast. Whereas in the first movement one theme flows directly into the next, and the conversational interchange between the two instruments is intriguing, the second movement can be separated into two alternating sections. Beginning with the bucolic Andante, the folk-like Vivace enjoys a slight hint of humor. The movement ends in a short, light blaze of excitement. The finale, Allegretto grazioso, is unusual in that it is devoid of the usual bravura excitement in Romantic-period works. The graceful and elegant rondo begins with a soulful line expressed in sustained legato. Mid-movement, there is a rather sudden passionate outburst and emotional upheaval. However, the poignantly calm theme of the opening returns to end the work in an expression of triumphant dignity.
David W. Altchek, MD (Hospital for Special Surgery, New York City). David W. Altchek医生（美国纽约特种外科医院） David W. Altchek是美国纽约特种外科医院运动医学主任和肩关节中心主任。David W. Altchek医生精通肩关节关节镜手术。为世界多名著名运动员进行肩关节损伤关节镜手术。David W. Altchek医生在纽约威尔康奈尔医学院获得医学学位。David W. Altchek医生现任纽约威尔康奈尔医学院临床骨科教授。David W. Altchek医生发表了100多篇有关肩关节、肘关节、膝关节的学术论文，并为很多书籍撰写了肩关节、肘关节、膝关节相关的章节。David W. Altchek医生是美国纽约大都会球队的医学总监。David W. Altchek医生是美国国家篮球协会医学顾问。David W. Altchek医生获得过多项荣誉。因其在肩关节领域的卓越研究，David W. Altchek医生获得了由美国肩肘关节医师学会颁发的Charles S. Neer奖。 美国特种外科医院网站链接：（美国排名第一的骨科中心 美国最好的骨科医院） http://www.hss.edu/index.htm David W. Altchek的个人主页链接： http://www.hss.edu/physicians_altchek-david.asp 67位美国最著名的肩关节专家名单链接 http://www.beckersorthopedicandspine.com/lists/item/8988-65-outstanding-shoulder-surgeons-and-specialists 江苏省徐州医学院附属医院骨科 关节镜、膝肩关节外科、骨科运动创伤方向 高绪仁 高绪仁：每天以解决膝、肩关节问题为乐：） 每天努力提高自己的技术和服务水平 不仅仅是解决其膝、肩关节问题，更是给其带来希望、未来和新生！
《古植物学的故事》资料补充与更正（第 12 次） Charles David White (1862--1935), NAS 第 38 期《古植物学的故事》简述了美国科学院及其古植物学院士与外籍院士的基本情况。可是， 美国 科学院已故院士、著名 地质学家和古植物学家 Charles David White (1862---1935) 被遗漏，现补充如下： 1886 年 C. D. White 毕业于康乃尔大学，其学位论文主要研究泥盆纪植物化石 Ptilophyton vanuxemi Dawson 。同年，康乃尔大学地质学与古生物学教授 Henry Shaler Williams (1847--1918) 推荐 C. D. White 到美国联邦地质调查局 (The U.S. Geological Survey----USGS) 工作。 1894 年 C. D. White 当选为 德国科学院 ( German Academy of Sciences Leopoldina ) 院士。 1912 年当选为美国科学院院士。 1931—1933 年担任 美国科学院副院长。 1903—1935 年 ， C. D. White 还兼任过位于华盛顿的美国国家自然历史博物馆 (The U.S.NM) 负责古植物学研究及标本管理的负责人（ associate curator curator ） 。 C. D. White 为什么要担任这个兼职？这涉及到 美国联邦地质调查局与 美国国家自然历史博物馆在国家层面及在法律层面上的长期协作关系。这对于中国国家自然历史博物馆的建设及其与相关学术机构的密切协作是有借鉴意义的。 孙启高 2012 年 6 月 18 日 本期编目 《古植物学的故事》资料补充与更正（第 12 次） American geologist and palaeobotanist, Charles David White , NAS (1862---1935) 相关资料 Charles David White http://en.wikipedia.org/wiki/David_White_(geologist) Henry Shaler Williams (1847--1918) http://en.wikipedia.org/wiki/Henry_Shaler_Williams http://siarchives.si.edu/collections/siris_arc_217395 http://bbs.sciencenet.cn/home.php?mod=spaceuid=225931do=blogquickforward=1id=583507 古植物学的故事（ 38 ）：美国科学院的古植物学院士与外籍院士 Story of Palaeobotany Series (No.38): Members and foreign associates of National Academy of Sciences (USA) regarding palaeobotany http://www.sciencenet.cn/blog/user_content.aspx?id=327253 发表于 2010-5-21 23:10:47 古植物学的故事 162 期 360 年以来德国科学院涉及古植物学研究的院士们 Story of Palaeobotany Series (No.162): Members of the German Academy of Sciences Leopoldina pertaining to the palaeobotanical studies since 1652 http://blog.sciencenet.cn/home.php?mod=spaceuid=225931do=blogquickforward=1id=575639 2012-5-27 23:26
David L. Waltz, Computer Science Pioneer, Dies at 68 By JOHN MARKOFF Published: March 23, 2012（From The New York Times ） David Waltz spearheaded advances in artificial intelligence.（ Eileen Barroso for Columbia Engineering ） David L. Waltz, a computer scientist whose early research in information retrieval provided the foundation for today’s Internet search engines , died on Thursday in Princeton, N.J. He was 68. The cause was brain cancer, his wife, Bonnie Waltz, said. He died at the University Medical Center at Princeton. During his career as a teacher and a technologist at start-up companies as well as large corporate laboratories, Dr. Waltz made fundamental contributions to computer science in areas ranging from computer vision to machine learning. One signal achievement was the development of a basic technique that makes it possible for computers to render three-dimensional scenes accurately . As part of his Ph.D.dissertation at the Massachusetts Institute of Technology, he developed an algorithm that could extract a rich three-dimensional understanding of a scene from two-dimensional line drawings with shadows . The 3-D research was seminal in the fields of computer vision and artificial intelligence. Known as “ constraint propagation ”, the technique is now used in industry for solving problems like route scheduling, package routing and construction scheduling . At M.I.T., Dr. Waltz was taught by Marvin Minsky, a pioneer in artificial intelligence. Dr. Waltz graduated in 1972, then taught computer science at the University of Illinois at Urbana-Champaign and, later, at Brandeis University in Massachusetts. But it was as a member of a group of researchers at the Thinking Machines Corporation, in Cambridge, Mass., that Dr. Waltz made his breakthrough in information retrieval . Thinking Machines was an early maker of massive, parallel supercomputers, and by joining the company, in 1984, Dr. Waltz gained access to computers that by ’80s standards held vast amounts of fast random-access memory, up to 512 megabytes. “ For the first time it was possible to use simple algorithms with lots and lots of data ,” said Brewster Kahle, a computer scientist who directs the Internet Archives and was one of the Thinking Machines researchers. Access to that database was crucial to Dr. Waltz’s development of a technique known as memory, or “ case based ” reasoning. It revolutionized the way computers recognized characters, words, images and later, even voices. Before, a computer had to follow a set of programmed rules to arrive at recognition (it’s an “i” if there’s a dot, for example). Now it could comb through its vast memory and deduce what the image was by comparing it to what had been stored there. The technique transformed the field of artificial intelligence and also greatly advanced voice recognition and machine vision technology. And it led directly to the “big data” and data-science approaches that are essential tools for search engines, allowing them to sift through large collections of information to improve accuracy and relevance. “ He was a real pioneer ,” said Peter Norvig, Google’s director of research. “ The two main changes that got us modern A.I. were probabilistic reasoning and using memory rather than rules .” “ I don’t know if Larry and Sergey read his papers directly ,” he added, referring to Google’s founders, Larry Page and Sergey Brin, “ but the idea, filtered through however many people, was certainly a key. ” While at the University of Illinois, Dr. Waltz turned to the field of natural language understanding , a component of artificial intelligence involving the interpretation of language. With support from the Office of Naval Research, he built a question-answering system called Planes and explored the use of neural networks in language processing . In another early project, a Thinking Machines group led by Dr. Waltz designed an information retrieval system that made it possible for a remote user to gain access to a supercomputer and then be able to search through large volumes of documents . The system, known as Wide Area Information Server , or WAIS, and designed in cooperation with the Dow Jones Corporation, Apple Computer and KPMG Peat Marwick, was not the first information retrieval system. But it was innovative in enabling the user to uncover connections between seemingly disparate documents. For example, the WAIS system was able to give an early warning of the Chernobyl disaster in 1986 after it discovered a report of an abnormal radiation reading in Scandinavia, according to W. Daniel Hillis, the co-founder of Thinking Machines. WAIS also introduced techniques to narrow a document search. It was followed by other search systems, like Veronica, Gopher and Archie, which predated the search engines offered today by Google, Microsoft, Yahoo and other companies. After leaving Thinking Machines in 1993, Dr. Waltz joined the NEC Research Institute in Princeton, where he was president from 2000 to 2002. He left to help create the Center for Computational Learning Systems at Columbia, where he was director. The center has worked with Con Edison of New York in developing systems that can predict power failures and thus enhance maintenance of the electric power grid. Researchers there are also working on creating a computer-based system to give people with epilepsy early warnings of seizures. The technique involves mining data generated by electrodes implanted in patients. Dr. Waltz earlier was instrumental in establishing interdisciplinary research centers: the Beckman Institute at the University of Illinois, and the Volen National Center for Complex Systems at Brandeis. David Leigh Waltz was born in Boston on May 28, 1943 , to Maynard C. Waltz and the former Lubov Leonovich. His father, a physicist, worked at M.I.T.’s Radiation Laboratory during World War II and later at Bell Labs. Dr. Waltz obtained both undergraduate and graduate degrees at M.I.T. in electrical engineering. He lived in Princeton. Besides his wife, he is survived by a brother, Peter; a son, Jeremy; a daughter, Vanessa Waltz, and a granddaughter. （A version of this article appeared in print on March 24, 2012, on page B 9 of the New York edition with the headline: David L. Waltz, Computer Science Pioneer, Dies at 68.） David L. Waltz (28 May 1943– 22 March 2012) RIP, Dr. Waltz. You'll be missed by all that benefit from theInternet and AI.
古植物学的故事（ 121 ）期 美国当代古植物学家（之一） 2009 年度中国政府 “ 友谊奖 ” 获得者 ---- 当过“报童”的美国科学院院士 David L. Dilcher 教授 孙启高 2011 年 6 月 26 日 星期日 第 35 期《古植物学的故事》提到美国两位著名古植物学家，即： Jack Albert Wolfe （ 1936--2005 ）和 David L. Dilcher （ 1936-- ）。非常巧合的是这两位学者的生日相同，均出生于 1936 年 7 月 10 日。 Jack Albert Wolfe 的学术历史已作介绍，本期《古植物学的故事》简要介绍当过“报童”的美国科学院院士、 2009 年度中国政府 “ 友谊奖 ” 获得者 David L. Dilcher 教授。 2006 年 3 月上海科技教育出版社出版了 David L. Dilcher 教授的英文自传 -- 《好奇的一生 : 迪尔切传略》（ A Curious Life—An Autobiographical Sketch ）。 David L. Dilcher 教授回顾了他的成长经历和学术经历。 1936 年 7 月 10 日 David L. Dilcher 出生在艾奥瓦（ Iowa ）州的 Cedar Falls ，父亲是 Leonard George Dilcher ，母亲是 Hannah Elisa Short Dilcher 。 1942 年， Leonard George Dilcher 到明尼苏达州的北方泵厂 (The Northern Pump Factory in Minnesota) 工作，故举家搬到明尼苏达州一个叫做 Anoka 的小镇居住。 David L. Dilcher 在 Anoka 长大， 6 岁到 22 岁在 Anoka 小镇学习和生活。 David L. Dilcher 在他的《自传》中回忆， 9--12 岁他当过报童 。每天（ 7 days a week ） David 要给 30—40 客户送一种名叫 The Star and Tribune 的晚报。送报要求某种苛刻的准时性，放学后 David 不得不每晚都要在固定的送报线路上奔走，这种单调乏味的生活教育了年少的 David 要学会坚持和忍耐。现将有关文字抄录如下： “I delivered the Star and Tribune evening newspaper to about 30-40 customers 7 days a week from ages 9 to 12.Collecting house to house on Friday evening and Saturday mornings was always a chore （杂活 / 琐事） . But the rigor, importance of delivering the paper on time, and the routine of walking the paper route each evening when school was out taught me to persevere, even I did not enjoy the work and would rather have played. I learned that there could be a sense of finishing the work in front of me that could bring some slight satisfaction. Many a winter night I would come home in the dark after walking about 3—4 miles, picking up and delivering my papers. In the cold Minnesota winters my toes would often lose all feeling and ached when then began to thaw when I was home preparing for supper. From age 9 and on I earned the money I needed for clothes, entertainment, and miscellaneous expenses.” David L. Dilcher 就读于 Anoka 高中 (Anoka High School) ， 1954 年毕业。 Katherine Swanson 是 David 的高中同窗，后来成为他的妻子（注： 1961 年结婚）。 1954—1958 年， David L. Dilcher 就读于明尼苏达大学（ University of Minnesota ）。 John Hall 教授对 David 的学习生活产生重要影响，使他涉猎古植物学研究。 1958 年夏 ， David L. Dilcher 从明尼苏达大学教育学院毕业，获得自然科学教育方向的学士学位。同年秋 ， David L. Dilcher 在明尼苏达大学继续学习。 David L. Dilcher 曾跟随 Orval Dhal 教授学习过孢粉学课程。 1959 年， David L. Dilcher 研究了采自中始新世 Puryear 粘土中的叶化石角质层 (cuticle) 。 1960 年， David L. Dilcher 完成 3 篇研究论文并获得理学硕士学位。 1960 年夏 —1962 年夏， David L. Dilcher 在伊利诺斯大学 (The University of Illinois at Champaign-Urana) 跟随古植物学家 Ted Delevoryas 学习。伊利诺斯大学植物系有一个著名的古植物学实验室，当时该实验室的学术领袖是著名古植物学家 Wilson N. Stewart (1918--2004) 。在这一时期， David L. Dilcher 的古植物学研究深受现代植物解剖学、形态学等学科的学术思想之影响。 1962 年秋， Ted Delevoryas （ 1929-- ）到耶鲁大学任教， David L. Dilcher 同时前往耶鲁大学生物系，继续跟随 Ted Delevoryas 学习。 1964 年 David L. Dilcher 从耶鲁大学获得博士学位。 1964—1965 年， David L. Dilcher 到德国法兰克福 Senckenberg 博物馆跟随著名古植物学家 Richard Kr a usel （ 1890—1966 ）从事博士后研究。 1965—1966 年， David L. Dilcher 回到耶鲁大学生物系担任生物学教员。自 1966 年起 ， David L. Dilcher 开始供职于印地安那大学（ Indiana University ） 植物系，直到 1990 年。 1974 年， David L. Dilcher 在国际著名的植物学期刊 Botanical Review （《植物学论评》）发表了他的专著性研究 —Approaches to the Identification of Angiosperm Leaf Remains 。 David L. Dilcher 在他的著作中全面总结了鉴定被子植物叶化石的主要方法，其中对于角质层分析技术做了系统性的归纳。这项工作对于被子植物叶化石的研究具有长期影响。 自 1990 年起 ， David L. Dilcher 开始供职于佛罗里达大学自然历史博物馆，直到 2009 年退休。 1979 年，中国古植物学家徐仁（ 1910--1992 ）、李星学（ 1917--2010 ）、田宝霖（ 1929—2008 ）、朱为庆和赵修祜访问美国， David L. Dilcher 与中国同行开始了越来越密切的直接交往。 1986 年 ， David L. Dilcher 第一次访问中国，开始全面与中国同行合作。他和中国古植物学家孙革先生关于早期被子植物的长期合作尤为引人注目。 David L. Dilcher 教授对于美国古植物学乃至世界古植物学的贡献是多方面的。我觉得，非常重要的是 David L. Dilcher 教授与他的同事们及学生们经过半个世纪的不懈努力采集了 30 多万份植物大化石标本，标本的研究和馆藏实现了开放而有序的管理。 1989 年， David L. Dilcher 当选为美国科学院院士。他还曾担任美国植物学会主席、国际古植物学协会副主席。 2009 年， David L. Dilcher 荣获中国政府颁发的 “ 友谊奖 ” 。 相关资料： Dilcher, David L., 2006. A Curious Life—An Autobiographical Sketch ( 《好奇的一生 : 迪尔切传略》 ). Shanghai in China: Shanghai Century Publishing Co. Ltd. and Shanghai Science and Technological Education Publishing House, 1-176 古植物学的故事（ 35 ）： 为古植物学而生、为古植物学而死 --- 纪念杰出的古植物学家 Jack Albert Wolfe (1936—2005) http://www.sciencenet.cn/blog/user_content.aspx?id=297417 （ 2010-2-25 4:47:44 ） Dilcher, D. L., 1974. Approaches to the Identification of Angiosperm Leaf Remains Botanical Review, 40:1-157 =================== 附录： David L. Dilcher Biography David L. Dilcher received a bachelor's degree in natural history (1958) and a master's degree in botany, geology and zoology (1960) from the University of Minnesota. He received a Ph.D. in biology from Yale University in 1964. Currently, he is a graduate research professor in the Department of Natural Sciences at the University of Florida. He is described as one of the most outstanding and experienced botanists and paleobotanists in the world. He is known for pioneering a new line of research into the circumstances surrounding the ancestry and success of flowering plants and for setting the standard for quality research into angiosperm history through his studies of angiosperm leaf fossils. His study on flower evolution led him to China where he and a colleague, at Jilin University in China, presented evidence of a fossil that is believed to be the world's oldest flowering plant, at least 125 million years ago. This discovery and subsequent debate was featured in a PBS broadcast of a NOVA special entitled First Flower that featured Dilcher. He is highly regarded as a teacher and a mentor and he has been recognized for his scholarship by numerous organizations. He is the recipient of the Sonneborn Award for Distinguished Teaching and Research from the University of Indiana. He is a member of the National Academy of Sciences, a Fellow of the American Association for the Advancement of Science and a member of the International Organization of Paleobotanists. In addition, he was awarded the Guggenheim Fellowship (twice in his career), and was selected to serve as a Visiting Scholar to the People's Republic of China by NAS. http://uawards.umn.edu/Award_Recipients/Honorary_Degree_Recipients/dilcherd.html ---------------------- http://www.flmnh.ufl.edu/paleobotany/dilchercv.htm Address: 2260 E. Cape Cod Drive Bloomington, IN 47401, U.S.A. Email: paleoleo@yahoo.com Research Interests: Angiosperm evolution; the origin of flowers to the reproductive biology of the first flowering plants. The evolution of diversity in early angiosperms, the recognition of early phylogenic lines of relationship between major taxa, trends in evolution of the group. Tertiary age radiations of angiosperms and their phytogeography. Evolutionary Biology. Plant/animal coevolution. Biostratigraphy, Biodiversity, Global Vegetational Change.
2010年度美国国家科学奖章获得者名单公布 http://news.sciencenet.cn/htmlnews/2010/10/238863.shtm http://scholar.google.com/scholar?hl=enq=D+MumfordbtnG=Searchas_sdt=2000as_ylo=as_vis=0 Optimal approximations by piecewise smooth functions and associated variational problems from uned.es D Mumford , J Shah - Communications on pure and applied , 1989 - interscience.wiley.com 'A preliminary version of this paper was submitted by invitation in 1986 to Computer Vision 1988, L. Erlbaum Press, but it has not appeared! ... Communications on Pure and Applied Mathematics, Vol. XLII 577-685 (1989) Q 1989 John Wiley Sons, Inc. Cited by 2160 - Related articles - All 16 versions Geometric invariant theory D Mumford , J Fogarty, FC Kirwan - 1994 - books.google.com David Mumford Department of Mathematics Harvard University 1 Oxford Street Cambridge, MA 02138, USA John Fogarty Department of Mathematics and Statistics University of Massachusetts Amherst, MA 01003, USA Frances Kirwan Balliol College Oxford OX 13BJ, England ... Cited by 1974 - Related articles - All 5 versions Abelian varieties D Mumford - 1970 - Oxford Univ Press Foundations of Algebraic Analysis Masaki Kashb/ara, Takahiro fawal, and Tatiuo Kimura Translated by Goro too The use of algebraic methods for studying anarysts b an Important theme In modem mathematics. The most sig- nificant devtluumem n this field Is mtootocal analysis, that Is, ... Cited by 1589 - Related articles - All 9 versions Tata lectures on theta I D Mumford - 1983 - books.google.com Modern Birkhauser Classics Many of the original research and survey monographs in pure and applied mathematics published by Birkhauser in recent decades have been groundbreaking and have come to be regarded as foun- dational to the subject. Through the MBC Series, ... Cited by 1283 - Related articles - Find in ChinaCat - All 8 versions The irreducibility of the space of curves of given genus from harvard.edu P Deligne, D Mumford - Publications Mathmatiques de l'IHES, 1969 - Springer Fix an algebraically closed field k. Let Mg be the moduli space of curves of genus g over k. The main result of this note is that Mg is irreducible for every k. Of course, whether or not M s is irreducible depends only on the characteristic of k. When the characteristic is o, we can assume that ... Cited by 1001 - Related articles - All 6 versions Boundary detection by minimizing functionals from northeastern.edu D Mumford , J Shah - Image understanding, 1988 - books.google.com 20 Mumford and Shah their analysis is to model them by smoothly varying functions with explicitly marked discontinuities. This is a mathematical statement of one of the major steps in figure/ground discrimination. This chapter studies a variational approach to this problem. Our approach ... Cited by 584 - Related articles - All 5 versions Lectures on curves on an algebraic surface D Mumford - 1966 - books.google.com ANNALS OF MATHEMATICS STUDIES Edited by Robert C. Gunning, John C. Moore, and Marston Morse 1. Algebraic Theory of Numbers, by Hermann Weyl 3. Consistency of the Continuum Hypothesis, by Kurt Godel 11. Introduction to Nonlinear Mechanics, by N. Kryloff and N. ... Cited by 755 - Related articles - Find in ChinaCat - All 5 versions Algebraic geometry I: Complex projective varieties D Mumford - 1995 - books.google.com OOCIM A.Dold Lectures on Algebraic Topology ISBN 3-540-58660-1 F. Hirzebruch Topological Methods in Algebraic Geometry ISBN 3-540-58663-6 T. Kato Perturbation Theory for Linear Operators ISBN 3-540-5866i-X S. Kobayashi Transformation Groups in Differential Geometry ISBN ... Cited by 527 - Related articles - All 8 versions Creativity syndrome: Integration, application, and innovation MD Mumford , SB Gustafson - Psychological Bulletin, 1988 - Elsevier The present article is concerned with certain conceptual issues embodied in the description and understanding of creative behavior. Initially, we argue that although creativity has been defined in many way, the ultimate concern in studies of creativity is the production of novel, ... Cited by 479 - Related articles - All 7 versions The topology of normal singularities of an algebraic surface and a criterion for simplicity D Mumford - Publications Mathmatiques de l'IHES, 1961 - Springer A normal point P in F is given. A finite sequence of quadratic transformations plus normalizations leads to a non-singular surface F' dominating F . The inverse image of P on F' is the union of a finite sct of curves El, E2, ...,E,. By further quadratic transformations if necessary we ... Cited by 438 - Related articles - All 3 versions Towards an enumerative geometry of the moduli space of curves D Mumford - Selected papers on the classification of varieties , 2004 - books.google.com Towards an Enumerative Geometry of the Moduli Space of Curves David Mumford Dedicated to Igor Shafarevitch on his 60th birthday Introduction The goal of this paper is to formulate and to begin an exploration of the cnumcrative geometry of the set of all curves of arbitrary ... Cited by 410 - Related articles - All 2 versions Stability of projective varieties: lectures... D Mumford - 1977 - L'Enseignement mathmatique Cited by 328 - Related articles The red book of varieties and schemes D Mumford - Lecture notes in mathematics, 1988 - cat.inist.fr ... Titre du document / Document title. The red book of varieties and schemes Auteur(s) / Author(s). MUMFORD D . (1) ; Affiliation(s) du ou des auteurs / Author(s) Affiliation(s). (1) Harvard univ., dep. mathematics, Cambridge MA 02138, ETATS-UNIS Rsum / Abstract. Varits. ... Cited by 359 - Related articles - All 3 versions Filters, random fields and maximum entropy (FRAME): Towards a unified theory for texture modeling from psu.edu SC Zhu, Y Wu, D Mumford - International Journal of Computer Vision, 1998 - Springer ... 112 Zhu, Wu and Mumford we assume that there exists a true joint probability density f (I)over the image spaceL| D | , and f (I)should concentrate on a subspace of L | D | which corresponds to texture images that have perceptually similar texture appearances. ... Cited by 360 - Related articles - BL Direct - All 34 versions Statistics of natural images and models from brown.edu J Huang, D Mumford - cvpr, 1999 - computer.org There has been much attention recently to the statistics of natural images. For example, Ruder- man discusses the approximate scale invariance property of natural images and Field linked the design of the biological vision system to the statis- tics of natural images. ... Cited by 295 - Related articles - BL Direct - All 16 versions An EBV-Genome-Negative Cell Line Established from an American Burkitt Lymphoma; Receptor Characteristics. EBV Infectibility and Permanent Conversion into EBV B Giovanella, A Westman, JS Stehlin, D Mumford - , 1975 - content.karger.com An in vitro line was derived from an American Burkitt lymphoma, designated Ra #1, which produced malignant tumors when inoculated into thymus-deficient nude mice. The cells have B-lymphocyte characteristics, with surface-associated mu and kappa chains and Epstein-Barr virus ... Cited by 328 - Related articles - All 3 versions Minimax entropy principle and its application to texture modeling from psu.edu SC Zhu, YN Wu, D Mumford - Neural Computation, 1997 - MIT Press ... Chun Zhu, Ying Nian Wu, and David Mumford is the partition function, which normalizes p(I; ) into a probability distri- bution. 2.2 Estimation and Computation. Equation 2.3 specifies an exponential family of distributions (Brown, 1986), S = {p(I; ,S) : Rd}, (2.4) where d is the total ... Cited by 318 - Related articles - BL Direct - All 13 versions On the computational architecture of the neocortex from brown.edu D Mumford - Biological cybernetics, 1991 - Springer Abstract. This paper proposes that each area of the cortex carries on its calculations with the active partici- pation of a nucleus in the thalamus with which it is reciprocally and topographically connected. Each corti- cal area is responsible for maintaining and updating the ... Cited by 289 - Related articles - All 7 versions On the Kodaira dimension of the moduli space of curves from psu.edu J Harris, D Mumford - Inventiones mathematicae, 1982 - Springer We consider the closure Dk of D k in 2g and compute the divisor class of O k in terms of the basic divisor classes ... (2k-4) The projectivity of the moduli space of stable curves I: Preliminaries on 'det'and 'Div' F Knudsen, D Mumford - Math. Scand, 1976 Cited by 281 - Related articles On the equations defining abelian varieties. I from kryakin.com D Mumford - Inventiones mathematic, 1966 - Springer My aim is to set up a purely algebraic theory of theta-functions. Actually, since my methods are algebraic and not analytic, the functions themselves will not dominate the picture - although they are there. The basic idea is to construct canonical bases of all linear systems on all ... Cited by 272 - Related articles - All 12 versions Hierarchical Bayesian inference in the visual cortex from psu.edu TS Lee, D Mumford - JOSA A, 2003 - opticsinfobase.org Received October 23, 2002; revised manuscript received February 21, 2003; accepted February 26, 2003 Traditional views of visual processing suggest that early visual neurons in areas V1 and V2 are static spa- tiotemporal filters that extract local features from a visual scene. ... Cited by 266 - Related articles - BL Direct - All 38 versions The role of the primary visual cortex in higher level vision from psu.edu TS Lee, D Mumford , R Romero, VAF Lamme - Vision research, 1998 - Elsevier In the classical feed-forward, modular view of visual processing, the primary visual cortex (area V1) is a module that serves to extract local features such as edges and bars. Representation and recognition of objects are thought to be functions of higher extrastriate cortical areas. ... Cited by 252 - Related articles - All 18 versions Varieties defined by quadratic equations D Mumford - Questions on Algebraic Varieties (CIME, III Ciclo, , 1969 Cited by 250 - Related articles Prym varieties I D Mumford - Contributions to analysis, in A Collection of papers , 1974 Cited by 245 - Related articles Prior learning and Gibbs reaction-diffusion from psu.edu SC Zhu, D Mumford - Pattern Analysis and Machine , 2002 - ieeexplore.ieee.org AbstractThis article addresses two important themes in early visual computation: First, it presents a novel theory for learning the universal statistics of natural imagesa prior model for typical cluttered scenes of the worldfrom a set of natural images, and, second, it proposes a ... Cited by 226 - Related articles - BL Direct - All 19 versions Leading creative people: Orchestrating expertise and relationships MD Mumford , GM Scott, B Gaddis, JM Strange - The Leadership Quarterly, 2002 - Elsevier Global competition, new production techniques, and rapid technological change have placed a premium on creativity and innovation. Although many variables influence creativity and innovation in organizational settings, there is reason to suspect that leaders and their behavior ... Cited by 217 - Related articles - All 5 versions Elastica and computer vision D Mumford , Center for Intelligent Control - 1991 - Center for Intelligent Control Cited by 216 - Related articles Leadership skills for a changing world:: Solving complex social problems MD Mumford , SJ Zaccaro, FD Harding, TO - The Leadership , 2000 - Elsevier Leadership has traditionally been seen as a distinctly interpersonal phenomenon demonstrated in the interactions between leaders and subordinates. The theory of leadership presented in this article proposes that effective leadership behavior fundamentally depends upon the ... Cited by 192 - Related articles - All 5 versions Filtering, segmentation, and depth M Nitzberg, D Mumford , T Shiota - 1993 - books.google.com Series Editors Gerhard Goos Juris Hartmanis Universitiit Karlsruhe Cornell University Postfach 69 80 Department of Computer Science Vincenz-Priessnitz-StraBe 1 4130 Upson Hall W-7500 Karlsruhe. FRG Ithaca, NY 14853, USA Authors Mark Nitzberg David Mumford ... Cited by 208 - Related articles - BL Direct - All 4 versions Theta-characteristics of an algebraic curve from brown.edu D Mumford - Ann. scient. Ec. Norm. Sup, 1971 - archive.numdam.org Gauthier-Villars (ditions scientifiques et mdicales Elsevier), 1971, tous droits rservs. L'accs aux archives de la revue Annales scientifiques de l'.NS (http://www. elsevier.com/locate/ansens), implique l'accord avec les conditions gnrales d 'utilisation ( ... Cited by 170 - Related articles - All 5 versions Curves and their Jacobians D Mumford - 1975 - getcited.org ... Curves and their Jacobians. Post a Comment. CONTRIBUTORS: Author: Mumford , David. PUBLISHER: University of Michigan Press (Ann Arbor). SERIES TITLE: YEAR: 1975. PUB TYPE: Book (ISBN 0472660004 ). VOLUME/EDITION: PAGES (INTRO/BODY): 104 p. ... Cited by 202 - Related articles - Cached - All 2 versions What can be computed in algebraic geometry from arxiv.org D Bayer, D Mumford - Computational algebraic geometry and , 1993 - arxiv.org This paper evolved from a long series of discussions between the two authors, going back to around 1980, on the problems of making effective computations in algebraic geometry, and it took more definite shape in a survey talk given by the second author at a conference on ... Cited by 176 - Related articles - View as HTML - All 16 versions An algebro-geometric construction of commuting operators and of solutions to the Toda lattice equation, Korteweg-deVries equation, and related non- D Mumford - Proc. Int. Symp. on Alg. Geom., Kyoto, 1977 Cited by 133 - Related articles - All 3 versions Some elementary examples of unirational varieties which are not rational from psu.edu M Artin, D Mumford - Proceedings of the London , 1972 - plms.oxfordjournals.org For n\, these are equivalent (Liiroth's theorem). For n = 2 they are equivalent in characteristic 0 (Castelnuovo's theorem) or if the map / in (a) is assumed separable (Zariski's extension of Castelnuovo's theorem). In 1959 ( ), Serre clarified classical work on this problem for n = 3. It has ... Cited by 159 - Related articles - All 9 versions Abelian varieties. Tata Institute of Fundamental Research Studies in Mathematics, 5 D Mumford - Published for the Tata Institute of Fundamental , 1970 Cited by 169 - Related articles A Bayesian treatment of the stereo correspondence problem using half-occluded regions from psu.edu PN Belhumeur, D Mumford - Computer Vision and Pattern , 2002 - ieeexplore.ieee.org A half-occluded region in a stereo pair pixels in one image representing points in is a set of svace visi- ble to that camera or eye only, and not to ihe other. These occur typically as parts of the background imme- diately to the left and right sides of nearby occluding objects, and are ... Cited by 144 - Related articles - All 11 versions Managing creative people: strategies and tactics for innovation MD Mumford - Human Resource Management Review, 2000 - Elsevier With rapid changes in technology, and global competition, the success of many organizations has become progressively more dependent on their ability to bring innovative products to market. Ultimately, however, innovation depends on the generation of creative, new ... Cited by 159 - Related articles - BL Direct - All 4 versions FRAME: Filters, Random fields, and Minimax Entropy--Towards a Unified Theory for Texture Modeling SC Zhu, Y Wu, D Mumford - cvpr, 1996 - computer.org Abstract In this paper, a minimax entropy principle is stud- ied, based on which a novel theory, called FRAME (Filters, Random fields And Minimax Entropy) is pro- posed for texture modeling. FRAME combines attrac- tive aspects of two important themes in texture model- ... Cited by 146 - Related articles - BL Direct - All 6 versions Taxonomic efforts in the description of leader behavior: A synthesis and functional interpretation EA Fleishman, MD Mumford , Y Zaccaro Kerry, J - The Leadership , 1991 - Elsevier A systematic definition of the behaviors contributing to effective organizational leadership is required for both theory development and the design of training interventions. This article describes an attempt to formulate a general taxonomy capable of describing the functional behavioral ... Cited by 154 - Related articles - All 2 versions Rational equivalence of 0-cycles on surfaces D Mumford - Kyoto Journal of Mathematics, 1969 - projecteuclid.org ... previous :: next. Rational equivalence of 0-cycles on surfaces. D . Mumford . Source: J. Math. Kyoto Univ. Volume 9, Number 2 (1969), 195-204. Full-text: Access by subscription. PDF File (677 KB). Links and Identifiers. Permanent ... Cited by 144 - Related articles - All 4 versions Hirzebruch's proportionality theorem in the non-compact case from uni-due.de D Mumford - Inventiones Mathematicae, 1977 - Springer In this section we will not be concerned specifically with the locally symmetric algebraic varieties D /F, but with general smooth quasi-projective algebraic varieties X. When X is not compact, we want to study the order of poles of differential forms on X at infinity, and when E is ... Cited by 134 - Related articles - All 4 versions 7 Neuronal Architectures for Pattern-theoretic Problems from psu.edu D Mumford - Large-scale neuronal theories of the brain, 1994 - books.google.com 7 Neuronal Architectures for Pattern-theoretic Problems David Mumford As is abundantly clear from the other chapters of this book, there are many levels at which one can attack the problem of modeling the computations of the cortex. For example, at one extreme, one can model ... Cited by 145 - Related articles - All 6 versions A remark on Mahler's compactness theorem from harvard.edu D Mumford - Proceedings of the American Mathematical Society, 1971 - ams.org DAVID MUMFORD Abstract. We prove that if G is a semisimple Lie group without compact factors, then for all open sets UCZG containing the uni- potent elements of G and for all OO, the set of discrete subgroups rCG such that (a) rnU={e\, (b) G/T compact and measure (G/T) ... Cited by 109 - Related articles - All 5 versions A note of Shimura's paper Discontinuous groups and abelian varieties from harvard.edu D Mumford - Mathematische Annalen, 1969 - Springer Recently, there has been considerable discussion of families of abelian varieties parametrized by quotients of bounded symmetric domains by arith- metic subgroups. An exposition of this material can be found in the papers of Shimura, Kuga, Satake and myself in . Subsequently in ... Cited by 112 - Related articles - All 6 versions Stochastic models for generic images from psu.edu D Mumford , B Gidas - Quarterly of applied mathematics, 2001 - Citeseer The idea of using statistical inference for analyzing and understanding images has been used for at least 20 years, going back, for instance, to the work of Grenander Gr] and Cooper Co]. To apply these techniques, one needs, of course, a probabilistic model for some class of ... Cited by 134 - Related articles - View as HTML - BL Direct - All 7 versions Algebraic geometry D Mumford - 1976 - Springer Cited by 140 - Related articles - Find in ChinaCat The rare coagulation disordersreview with guidelines for management from the United Kingdom Haemophilia Centre Doctors' Organisation , PW Collins, S Kitchen, G Dolan, AD Mumford - , 2004 - Wiley Online Library ... Bolton-Maggs, PHB, Perry, DJ, Chalmers, EA, Parapia, LA, Wilde, JT, Williams, MD, Collins, PW, Kitchen, S., Dolan, G. and Mumford , AD (2004), The rare coagulation disorders review with guidelines for management from the United Kingdom Haemophilia Centre Doctors ... Cited by 123 - Related articles - BL Direct - All 4 versions Job Feedback: Giving, Seeking, and Using Feedback for Performance Improvement , RF Morrison, J Adams, MD Mumford , G Stokes, WA - questia.com There is a compelling need for innovative approaches to the solution of many pressing problems involving human relationships in today's society. Such approaches are more likely to be successful when they are based on sound research and applications. This Series in Applied ... Cited by 131 - Related articles An analytic construction of degenerating curves over complete local rings D Mumford - Compositio Math, 1972 - archive.numdam.org Foundation Compositio Mathematica, 1972, tous droits rservs. L'accs aux archives de la revue Compositio Mathematica (http:// http://www.compositio.nl/) implique l'accord avec les conditions gnrales d 'utilisation (http://www.numdam.org/legal.php). Toute utilisation ... Cited by 136 - Related articles - All 5 versions
I think that each town should have a park.......a common possession forever, for instruction and recreation....All Walden wood might have been preserved for our park forever, with Walden in its mist.-------------Henry David Thoreau, October 15, 1859 我很喜欢这段话，每个小镇都应该有一座公园。这段话是Walden Pond State Reservation游览指南的引语，出自隐居于此的作家Henry David Thoreau。他的中文名字是亨利大卫梭罗， 最著名的著作是《瓦尔登湖》（1854）。据说这是19世纪美国文学非小说著作中最受欢迎的书籍。 去年十月中旬的一天，大学同学Wendy从Boston驱车前来我住的地方，邀我去她家一聚。第二天，我们去机场接了Sunny，在Boston逛了一天后，第二天开始在Boston附近的一些地方浏览。有美国独立战争打响第一枪的地方，还有其它几个有些典故的小镇，将来有时间再记。 且说那天下午，正是天高气爽的金秋时节，晴空湛蓝，山林刚开始红金漫染。车子在如画的秋色中行驶，两边都是茂密的树林。到一个有几所房子的地方停下来，往树林深处走去，看到一处极其简朴低矮的小木屋。只有一间房子，约7、8平米的样子，一望见底。房中有一张床，小窗边上有一张桌面倾斜的窄窄的书桌，再无他物。据说隐居者在冬天时将食物存放在地板下面。旁边有一个旅游团，有导游在讲解。这位隐居者就是Henry。关于他的生平，其时我一无所知，只是对他隐居的生活印象深刻。另外，他那句每一个小镇都应有一座公园令我颇有好感，十分赞同。 Henry的木屋外是一片美丽秋色，和一个澄澈如镜的小湖。湖的四周枫叶初红，在阳光下令人心境辽远。因是周末，游人不少。虽然已渐感秋意，还有两个人在湖中游泳，小孩子们在岸边戏闹。那时我并不知道，它因Henry那本《瓦尔登湖》早已闻名于世。于这个著名的小湖而言，我倒像一个隐居者了。 岸上一片金黄银杏，我和Wendy、Sunny从树下走过，仿佛又回到大学时代。她俩已到美国10几年了。Sunny住在Washington D.C附近，儿子已经长得很高了，温文尔雅。记得那年她回北京时，她儿子还很小，说话时说中国nese。有次外出，竟在我怀中睡着了。Wendy还是那样聪明伶俐，说话用词优雅准确，还像大学时代那样出口就能吟诵唐诗宋词。她有两个虎虎生威的儿子和一所漂亮的带有很大很大草坪的房子。她的屋前有查尔斯河流过，层林尽染，一片绚烂。听着树叶沙沙作响的声音，一时间，我们都有些沉默，有些感慨。 Henry的一生很短，不到45年，著作却很多。他在瓦尔登湖畔隐居了两年多，隐居期间也不是绝对地与世隔绝，反而游访甚多。关于他的生平与思想，在百度贴吧里有大段文字。可参见链接 http://tieba.baidu.com/f?kz=75852484 我只是在想，我们都需要隐居吗？隐居到让心安静下来，再安静一点，才能进入那深邃的智慧与思想之门吗？
生态学家：G. David Tilman （请选课的同学注意：结合生态学课程的教学内容，选择阅读你最感兴趣的Tilman的一篇文章予以阅读，并准备在课堂上交流；并概述他的研究领域及主要理论和思想） G. David Tilman Regents' Professor McKnight Presidential Chair in Ecology Director of Cedar Creek Natural History Area Dept. of Ecology, Evolution, and Behavior On sabbatical for the 2007-08 academic year. Ph.D., University of Michigan, 1976 Contact Information Fax: 612-624-6777 E-mail: tilman@umn.edu Graduate Faculty Memberships Conservation Biology; Ecology, Evolution, and Behavior; Microbial Ecology Research Interests Ecological effects of human domination of the earth, including effects on ecosystem services of value to society; the ecological mechanisms controlling speciation, community assembly, species invasions and the evolution and maintenance of biodiversity; population ecology and theory of community dynamics and biodiversity; role of resource competition; biodiversity and ecosystem functioning; effects of habitat destruction. Statement I am intrigued by the causes of broad, general patterns in the biological diversity, structure and dynamics of ecosystems, in the benefits that society receives from natural and managed ecosystems, and in ways to assure environmental and social sustainability in the face of global increases in human consumption and population. I recently have focused on a related issue - the effects of biodiversity on the stability and functioning of ecosystems, which is scientifically intriguing and of great importance to society. Finally, I am interested in the impacts of human domination of global ecosystems, especially in the impacts of nitrogen deposition, habitat destruction/fragmentation, and invasive exotic species. I study mechanisms of resource competition among terrestrial plants, especially in the grasslands of Minnesotas Cedar Creek Natural History Area. This work has focused on causes of succession and controls of both diversity and species composition. My approach has been to combine well-replicated field experiments with mathematical theory. Some of the questions we are currently exploring in field experiments are (1) the effects of plant diversity on ecosystem productivity, nutrient retention, and stability; (2) the effects of community diversity on invasibility; (3) effects of diversity on disease dynamics and herbivory, and the feedback effects of these on stability and productivity; (4) effects of nitrogen deposition on diversity, stability and composition of grassland ecosystems; (5) the interactive effects of carbon dioxide, nitrogen deposition and plant diversity on primary productivity and its stability; (6) effects of climate change on ecosystem composition, diversity and functioning; and (7) the role of recruitment limitation in structuring plant communities. These collaborative projects take place at Cedar Creek and are supported by the NSF Long-Term Ecological Research Program or the Bush Foundation. Books Tilman, D. 1982. Resource Competition and Community Structure. Monographs in Population Biology, Princeton University Press. 296 pp. Tilman, D. 1988. Plant Strategies and the Dynamics and Structure of Plant Communities. Monographs in Population Biology, Princeton University Press. 360 pp. Grace, J. and D. Tilman, Editors. 1990. Perspectives in Plant Competition. Academic Press, New York. Tilman, D. and P. Karieva, Eds. 1997. Spatial Ecology: The Role of Space in Population Dynamics and Interspecific Interactions. Monographs in Population Biology, Princeton University Press. 368 pp. Kinzig, A. P., S. W. Pacala and D. Tilman. 2002. Functional Consequences of Biodiversity: Empirical Progress and Theoretical Extensions. Princeton University Press, Princeton and Oxford. Selected Publications Tilman, D. and A. El Haddi. 1992. Drought and biodiversity in grasslands. Oecologia 89:257-264. Tilman, D., R.M. May, C.L. Lehman, and M.A. Nowak. 1994. Habitat destruction and the extinction debt. Nature 371:65-66. Tilman, D. and J.A. Downing. 1994. Biodiversity and stability in grasslands. Nature 367:363-365. Cohen, J. E. and D. Tilman. 1996. Biosphere 2 and biodiversity: the lessons so far. Science 274:1150-1151. Tilman, D. 1996. Biodiversity: Population versus ecosystem stability. Ecology 77(3):350-363. Tilman, D., D. Wedin and J. Knops. 1996. Productivity and sustainability influenced by biodiversity in grassland ecosystems. Nature 379:718-720. Wedin, D. A. and D. Tilman. 1996. Influence of nitrogen loading and species composition on the carbon balance of grasslands. Science 274:1720-1723. Siemann, E., D. Tilman and J. Haarstad. 1996. Insect species diversity, abundance and body size relationships. Nature 380:704-706. Tilman, D. 1998. The greening of the green revolution. Nature 396:211-212. Tilman, D. 1999. The ecological consequences of changes in biodiversity: a search for general principles. The Robert H. MacArthur Award Lecture. Ecology 80:1455-1474. Tilman, D. 2000. Causes, consequences and ethics of biodiversity. Nature 405:208-211. Tilman, D., J. Fargione, B. Wolff, C. DAntonio, A. Dobson, R. Howarth, D. Schindler, W. Schlesinger, D. Simberloff, D. Swackhamer. 2001. Forecasting Agriculturally Driven Global Environmental Change. Science 292:281-284. Tilman, D., K. G. Cassman, P. A. Matson, R. Naylor and S. Polasky. 2002. Agricultural sustainability and intensive production practices. Nature 418:671-677. Tilman, D., P. B. Reich, J. Knops, D. Wedin, T. Mielke and C. Lehman. 2001. Diversity and productivity in a long-term grassland experiment. Science 294:843-845. Mitchell, C., D. Tilman and J. V. Groth. 2002. Effects of grassland plant species diversity, abundance, and composition on foliar fungal disease. Ecology 83:1713-1726. Kennedy, T. A., S. Naeem, K. M. Howe, J. M. H. Knops, D. Tilman and P. Reich. 2002. Biodiversity as a barrier to ecological invasion. Nature 417:636-638. Tilman, D. 2004. Niche tradeoffs, neutrality, and community structure: A stochastic theory of resource competition, invasion, and community assembly. Proceedings of the National Academy of Sciences 101:10854-10861. Additional Links My Biographical Sketch My CV Cedar Creek Natural History Area IGERT Training Grant
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