Template:Selected anniversaries/April 19: Difference between revisions

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||1567: Michael Stifel dies ... monk and mathematician. He was an Augustinian who became an early supporter of Martin Luther. He was later appointed professor of mathematics at Jena University. Pic.
File:Michael_Stifel.jpg|link=Michael Stifel (nonfiction)|1567: Mathematician, monk, and academic [[Michael Stifel (nonfiction)|Michael Stifel]] dies. Stifel was an Augustinian who became an early supporter of Martin Luther.
 
||1739: Nicholas Saunderson dies ... scientist and mathematician. He may have been the earliest discoverer of Bayes theorem. Pic.
 
||1795: Christian Gottfried Ehrenberg born ... naturalist, zoologist, comparative anatomist, geologist, and microscopist, was one of the most famous and productive scientists of his time. Ehrenberg was an evangelist. Pic.
 
||1801: Gustav Theodor Fechner born ... philosopher, physicist and experimental psychologist. An early pioneer in experimental psychology and founder of psychophysics, he inspired many 20th century scientists and philosophers. He is also credited with demonstrating the non-linear relationship between psychological sensation and the physical intensity of a stimulus which became known as the Weber–Fechner law. Pic.
 
||1806: Isambard Kingdom Brunel born ... engineer, designed the Clifton Suspension Bridge (d. 1859)
 
||1830: Eadweard Muybridge born ... photographer and cinematographer.
 
||1832: José Echegaray y Eizaguirre born ... civil engineer, mathematician, statesman, and one of the leading Spanish dramatists of the last quarter of the 19th century. He was awarded the 1904 Nobel Prize for Literature "in recognition of the numerous and brilliant compositions which, in an individual and original manner, have revived the great traditions of the Spanish drama".
 
||1854: Professor Robert Jameson dies ... naturalist and mineralogist. Pic.


File:Edouard-Léon Scott de Martinville.jpg|link=Édouard-Léon Scott de Martinville (nonfiction)|1860: On his phonautograph machine, [[Édouard-Léon Scott de Martinville (nonfiction)|Édouard-Léon Scott de Martinville]] makes the oldest known recording of an audible human voice.
File:Edouard-Léon Scott de Martinville.jpg|link=Édouard-Léon Scott de Martinville (nonfiction)|1860: On his phonautograph machine, [[Édouard-Léon Scott de Martinville (nonfiction)|Édouard-Léon Scott de Martinville]] makes the oldest known recording of an audible human voice.


File:Karl Mikhailovich Peterson.jpg|link=Karl Mikhailovich Peterson (nonfiction)|1881: Mathematician [[Karl Mikhailovich Peterson (nonfiction)|Karl Mikhailovich Peterson]] dies. He discovered equations which were subsequently named the Gauss–Codazzi equations, fundamental to the theory of embedded hypersurfaces in a Euclidean space.
File:Flying Bison.jpg|link=Flying bison|1882: Large herd of [[Flying bison]] (''Bison pterobonasus'') swarms from Saint Paul, Minnesota to New Minneapolis, Canada.
 
File:Flying Bison.jpg|link=Flying bison|1882: Large herd of [[Flying bison]] (''Bison pterobonasus'') migrates from [[Periphery (town)|Periphery]] to [[New Minneapolis, Canada]].
 
||1883: Richard Edler von Mises born ... scientist and mathematician who worked on solid mechanics, fluid mechanics, aerodynamics, aeronautics, statistics and probability theory.
 
||1885: Leonida Tonelli born ...mathematician, noted for creating Tonelli's theorem, a variation of Fubini's theorem, and for introducing semicontinuity methods as a common tool for the direct method in the calculus of variations.
 
||1889: Michel Eugène Chevreul dies ... chemist and academic (b. 1786)
 
||1901: Kiyoshi Oka born ... mathematician who did fundamental work in the theory of several complex variables. Pic.
 
||1902: Chemist Hans von Pechmann dies ... he discovered diazomethane in 1894 ... Pechmann condensation and Pechmann pyrazole synthesis.
 
||1905: Charles Ehresmann born ... mathematician who worked in differential topology and category theory. He was an early member of the Bourbaki group, and is known for his work on the differential geometry of smooth fiber bundles, notably the Ehresmann connection, the concept of jets of a smooth map, and his seminar on category theory.
 
||1909: Conel Hugh O'Donel Alexander born ... cryptanalyst, chess player, and chess writer. He worked on the German Enigma machine at Bletchley Park during the Second World War, and was later the head of the cryptanalysis division at GCHQ for 25 years. Pic.
 
File:Glenn Seaborg.jpg|link=Glenn T. Seaborg (nonfiction)|1912: Chemist [[Glenn T. Seaborg (nonfiction)|Glenn T. Seaborg]] born. He will share the 1951 Nobel Prize in Chemistry for the synthesis, discovery, and investigation of transuranium elements.
 
File:Havelock_and_Tesla_telecommunications_research.jpg|link=Havelock and Tesla Research Telecommunication|1913: ''[[Havelock and Tesla Research Telecommunication]]'' wins Pulitzer Prize, hailed as "the most prescient illustration of the decade".
 
File:Charles Sanders Peirce in 1859.jpg|link=Charles Sanders Peirce (nonfiction)|1914: Mathematician and philosopher [[Charles Sanders Peirce (nonfiction)|Charles Sanders Peirce]] dies. He is remembered as "the father of pragmatism".
 
File:Giuseppe Peano.jpg|link=Giuseppe Peano (nonfiction)|1932: Mathematician [[Giuseppe Peano (nonfiction)|Giuseppe Peano]] publishes new class of [[Gnomon algorithm functions]] which use [[Set theory (nonfiction)|set theory]] to detect and prevent [[crimes against mathematical constants]].
 
||1918: Jørn Utzon born ... designed the Sydney Opera House (d. 2008)
 
||1919: J. Presper Eckert born ...  engineer, invented the ENIAC.
 
||1921: Mary Jackson born ... mathematician and aerospace engineer (d. 2005)
 
||1921: Leon Albert Henkin born ... logician at the University of California, Berkeley. He was principally known for "Henkin construction", his version of the proof of the semantic completeness of standard systems of first-order logic. Pic.
 
||1930: F. Albert Cotton born ... chemist and academic (d. 2007)
 
||1933: Ernest William Hobson dies ... mathematician, now remembered mostly for his books, some of which broke new ground in their coverage in English of topics from mathematical analysis. G. H. Hardy wrote, "Although he lived to be 76, he was active almost up to his death; his last book (and perhaps in some ways his best) was published when he was 74. He was a singular exception to the general rule that good mathematicians do their best work when they are young."  Pic.
 
||1945: The United States Atomic Energy Commission is formed.
 
||1951: Vilhelm Bjerknes dies ... physicist and meteorologist (b. 1862)
 
||1959: Project Mercury: NASA announces the selection of the United States' first seven astronauts, whom the news media quickly dub the "Mercury Seven".
 
||1971: The first space station, Salyut 1, was launched from the Baikonur Cosmodrome near Tyuratam, Kazakh SSR, USSR.
 
||1974: Alexander Dinghas dies ... mathematician. Pic.
 
||1981: The U.S. Navy nuclear submarine USS George Washington accidentally collides with the Nissho Maru, a Japanese cargo ship, sinking it.
 
||2007: Dorrit Hoffleit dies ... astronomer and academic. Pic.
 
||2013: Kenneth Ira Appel dies ... mathematician who in 1976, with colleague Wolfgang Haken at the University of Illinois at Urbana-Champaign, solved one of the most famous problems in mathematics, the four-color theorem. They proved that any two-dimensional map, with certain limitations, can be filled in with four colors without any adjacent "countries" sharing the same color. Pic: http://www.kindertransporte-nrw.eu/appel/appel_work_1_e.html
 
||2015: Alexander Dalgarno dies ... physicist and academic. Dalgarno's research covered three main areas: theoretical atomic and molecular physics, astrophysics and aeronomy (the study of the upper atmosphere). Known as the "father of molecular astrophysics."  Pic.


||2016: Duane Clarridge dies ... American spy. Pix not Wiki.
File:Glenn Seaborg.jpg|link=Glenn T. Seaborg (nonfiction)|1912: Chemist [[Glenn T. Seaborg (nonfiction)|Glenn T. Seaborg]] born. Seaborg will share the 1951 Nobel Prize in Chemistry for the synthesis, discovery, and investigation of transuranium elements.  


File:Violet Spiral.jpg|link=Violet Spiral (nonfiction)|2016: Chromatographic analysis of ''[[Violet Spiral (nonfiction)|Violet Spiral]]'' reveals "at least two, probably three" previously unknown shades of [[Violet (nonfiction)|violet]].
File:Walter Kohn.jpg|link=Walter Kohn (nonfiction)|2016: Theoretical physicist, theoretical chemist, and Nobel laureate [[Walter Kohn (nonfiction)|Walter Kohn]] dies. Kohn developed density functional theory, which makes it possible to calculate quantum mechanical electronic structure by equations involving the electronic density.


File:Walter Kohn.jpg|link=Walter Kohn (nonfiction)|2016: Theoretical physicist, theoretical chemist, and Nobel laureate [[Walter Kohn (nonfiction)|Walter Kohn]] dies. He developed density functional theory, which makes it possible to calculate quantum mechanical electronic structure by equations involving the electronic density.
File:Great Nerd Giveaway Poster.png|link=Minicon 54 (nonfiction)|2019: The [[Minicon 54 (nonfiction)|Minicon 54 Great Nerd Giveaway]] begins. By the end of Minicon 54, hundreds of nerd items will have found new homes, generating an abundance of fun in the process.


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Latest revision as of 05:01, 21 April 2022