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Sōichi Kakeya
was a Japanese mathematician who worked mainly in mathematical analysis and who posed the Kakeya problem and solved a version of the transportation problem. He received the Imperial Prize of the Japan Academy in 1928, and was elected to the Japan Academy The Japan Academy (Japanese: 日本学士院, ''Nihon Gakushiin'') is an honorary organisation and science academy founded in 1879 to bring together leading Japanese scholars with distinguished records of scientific achievements. The Academy is c ... in 1934. References * Kakeya, S. (1912-13) "On the Limits of the Roots of an Algebraic Equation with Positive Coefficients," Tohoku Mathematical Journal (First Series),2:140–142. 1886 births 1947 deaths 20th-century Japanese mathematicians University of Tokyo alumni Academic staff of the University of Tokyo Academic staff of the University of Tsukuba Laureates of the Imperial Prize {{Asia-mathematician-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kakeya Set
In mathematics, a Kakeya set, or Besicovitch set, is a set of points in Euclidean space which contains a unit line segment in every direction. For instance, a disk of radius 1/2 in the Euclidean plane, or a ball of radius 1/2 in three-dimensional space, forms a Kakeya set. Much of the research in this area has studied the problem of how small such sets can be. Besicovitch showed that there are Besicovitch sets of measure zero. A Kakeya needle set (sometimes also known as a Kakeya set) is a (Besicovitch) set in the plane with a stronger property, that a unit line segment can be rotated continuously through 180 degrees within it, returning to its original position with reversed orientation. Again, the disk of radius 1/2 is an example of a Kakeya needle set. Kakeya needle problem The Kakeya needle problem asks whether there is a minimum area of a region D in the plane, in which a needle of unit length can be turned through 360°. This question was first posed, for Convex set, convex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kakeya Problem
In mathematics, a Kakeya set, or Besicovitch set, is a set of points in Euclidean space which contains a unit line segment in every direction. For instance, a disk of radius 1/2 in the Euclidean plane, or a ball of radius 1/2 in three-dimensional space, forms a Kakeya set. Much of the research in this area has studied the problem of how small such sets can be. Besicovitch showed that there are Besicovitch sets of measure zero. A Kakeya needle set (sometimes also known as a Kakeya set) is a (Besicovitch) set in the plane with a stronger property, that a unit line segment can be rotated continuously through 180 degrees within it, returning to its original position with reversed orientation. Again, the disk of radius 1/2 is an example of a Kakeya needle set. Kakeya needle problem The Kakeya needle problem asks whether there is a minimum area of a region D in the plane, in which a needle of unit length can be turned through 360°. This question was first posed, for convex regions, by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kakeya Conjecture
In mathematics, a Kakeya set, or Besicovitch set, is a set of points in Euclidean space which contains a unit line segment in every direction. For instance, a disk of radius 1/2 in the Euclidean plane, or a ball of radius 1/2 in three-dimensional space, forms a Kakeya set. Much of the research in this area has studied the problem of how small such sets can be. Besicovitch showed that there are Besicovitch sets of measure zero. A Kakeya needle set (sometimes also known as a Kakeya set) is a (Besicovitch) set in the plane with a stronger property, that a unit line segment can be rotated continuously through 180 degrees within it, returning to its original position with reversed orientation. Again, the disk of radius 1/2 is an example of a Kakeya needle set. Kakeya needle problem The Kakeya needle problem asks whether there is a minimum area of a region D in the plane, in which a needle of unit length can be turned through 360°. This question was first posed, for convex regions, by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperial Prize Of The Japan Academy
The is a prestigious honor conferred to two of the recipients of the Japan Academy Prize. Overviews It is awarded in two categories: humanities and natural sciences. The Emperor and Empress visit the awarding ceremony and present a vase to the awardees. Laureates * 2019 — Makoto Fujita (109th) * 2018 — , Chikashi Toyoshima (108th) * 2017 — (107th) * 2016 — Kazutoshi Mori (106th) * 2015 — Hideo Hosono * 2014 — Isamu Akasaki * 2013 — , Yoshinori Tokura * 2012 — , Keiichi Namba * 2011 — , (101st)Japan Academy 101st 20 June 2011 retrieved 2011-08-15 * 2010 — , Shinya Yamanaka (100th)Japan Academy 91st-100th retrieved 2011-08-15 * 2009 — , (99th) * 2008 — (98th) * 2007 — , Shizuo Akira (97th) * 2006 — Shuh Narumiya (96th) * 2005 — Kazuya Kato (95th) * 2004 — , Takeshi Yasumoto (94th) * 2003 — Mitsuhiro Yanagida (93rd) * 2002 — , Sumio Iijima (92nd) * 2001 — Fumio Hayashi, Makoto Asashima (91st) * 2000 — , Shigekazu Nagata (90th)Ja ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Academic Staff Of The University Of Tokyo
An academy (Attic Greek: Ἀκαδήμεια; Koine Greek Ἀκαδημία) is an institution of secondary education, secondary or tertiary education, tertiary higher education, higher learning (and generally also research or honorary membership). The name traces back to Plato's school of philosophy, founded approximately 385 BC at Akademia, a sanctuary of Athena, the goddess of wisdom and Skills, skill, north of Ancient Athens, Athens, Greece. Etymology The word comes from the ''Academy'' in ancient Greece, which derives from the Athenian hero, ''Akademos''. Outside the city walls of Athens, the Gymnasium (ancient Greece), gymnasium was made famous by Plato as a center of learning. The sacred space, dedicated to the goddess of wisdom, Athena, had formerly been an olive Grove (nature), grove, hence the expression "the groves of Academe". In these gardens, the philosopher Plato conversed with followers. Plato developed his sessions into a method of teaching philosophy and in 3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Tokyo Alumni
A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. Universities typically offer both undergraduate and postgraduate programs. In the United States, the designation is reserved for colleges that have a graduate school. The word ''university'' is derived from the Latin ''universitas magistrorum et scholarium'', which roughly means "community of teachers and scholars". The first universities were created in Europe by Catholic Church monks. The University of Bologna (''Università di Bologna''), founded in 1088, is the first university in the sense of: *Being a high degree-awarding institute. *Having independence from the ecclesiastic schools, although conducted by both clergy and non-clergy. *Using the word ''universitas'' (which was coined at its foundation). *Issuing secular and non-secular degrees: grammar, rhetoric, logic, theology, canon law, notarial law.Hunt Janin: "The university i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1947 Deaths
It was the first year of the Cold War, which would last until 1991, ending with the dissolution of the Soviet Union. Events January * January–February – Winter of 1946–47 in the United Kingdom: The worst snowfall in the country in the 20th century causes extensive disruption of travel. Given the low ratio of private vehicle ownership at the time, it is mainly remembered in terms of its effects on the railway network. * January 1 - The Canadian Citizenship Act comes into effect. * January 4 – First issue of weekly magazine ''Der Spiegel'' published in Hanover, Germany, edited by Rudolf Augstein. * January 10 – The United Nations adopts a resolution to take control of the free city of Trieste. * January 15 – Elizabeth Short, an aspiring actress nicknamed the "Black Dahlia", is found brutally murdered in a vacant lot in Los Angeles; the mysterious case is never solved. * January 16 – Vincent Auriol is inaugurated as president of France. * January 19 – Ferry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1886 Births
Events January–March * January 1 – Upper Burma is formally annexed to British Burma, following its conquest in the Third Anglo-Burmese War of November 1885. * January 5– 9 – Robert Louis Stevenson's novella ''Strange Case of Dr Jekyll and Mr Hyde'' is published in New York and London. * January 16 – A resolution is passed in the German Parliament to condemn the Prussian deportations, the politically motivated mass expulsion of ethnic Poles and Jews from Prussia, initiated by Otto von Bismarck. * January 18 – Modern field hockey is born with the formation of The Hockey Association in England. * January 29 – Karl Benz patents the first successful gasoline-driven automobile, the Benz Patent-Motorwagen (built in 1885). * February 6– 9 – Seattle riot of 1886: Anti-Chinese sentiments result in riots in Seattle, Washington. * February 8 – The West End Riots following a popular meeting in Trafalgar Square, London. * F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan Academy
The Japan Academy (Japanese: 日本学士院, ''Nihon Gakushiin'') is an honorary organisation and science academy founded in 1879 to bring together leading Japanese scholars with distinguished records of scientific achievements. The Academy is currently an extraordinary organ of the Ministry of Education, Culture, Sports, Science and Technology with its headquarters located in Taito, Tokyo, Japan. Election to the Academy is considered the highest distinction a scholar can achieve, and members enjoy life tenure and an annual monetary stipend. History In 1973, Meiroku-sha (Meairoku Society) was founded. The main people of Meiroku-sha involved in Meiroku-sha were from Kaiseijo (later transformed into University of Tokyo and so on) and Keio Gijuku (Keio University). In an effort to replicate the institutional landscape found in many Western nations, the leaders of the Meiji government sought to create a national academy of scholars and scientists modelled to the British Royal So ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fukayasu District, Hiroshima
was a district located in Hiroshima Prefecture, Japan. On October 1, 1898, the district was formed by the mergers of both Fukatsu and Yasuna Districts. On March 1, 2006, the last remaining town of Kannabe was merged into the expanded city of Fukuyama. Therefore, Fukayasu District was dissolved as a result of this merger. The entire district is now within the city of Fukuyama. The list of towns and villages at the time of the creation of Fukayasu District (October 1, 1898) Note: "○" is for the towns and villages of Fukatsu District and "●" is for the towns and villages of Yasuna District. * ○Fukuyama (福山町) * ○Ichi (市村) * ○Oōtsuno (大津野村) * ○Kasuga (春日村) * ○Kamiiwanari (上岩成村) * ●Kamitakeda (上竹田村) * ●Kamo (加茂村) * ●Kawakita (川北村) * ○Kawaguchi (川口村) * ●Kawaminami (川南村) * ○Kinoshō (木之庄村) * ○Shimoiwanari (下岩成村) * ●Shimokamo (下加茂村) * ●Shimotakeda (下竹田村 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transportation Problem
In mathematics and economics, transportation theory or transport theory is a name given to the study of optimal transportation and allocation of resources. The problem was formalized by the French mathematician Gaspard Monge in 1781.G. Monge. ''Mémoire sur la théorie des déblais et des remblais. Histoire de l’Académie Royale des Sciences de Paris, avec les Mémoires de Mathématique et de Physique pour la même année'', pages 666–704, 1781. In the 1920s A.N. Tolstoi was one of the first to study the transportation problem mathematically. In 1930, in the collection ''Transportation Planning Volume I'' for the National Commissariat of Transportation of the Soviet Union, he published a paper "Methods of Finding the Minimal Kilometrage in Cargo-transportation in space". Major advances were made in the field during World War II by the Soviet mathematician and economist Leonid Kantorovich.L. Kantorovich. ''On the translocation of masses.'' C.R. (Doklady) Acad. Sci. URSS (N.S. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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