Template:Selected anniversaries/April 19: Difference between revisions
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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. | 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. | ||
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||1869: Engineer and inventor Rudolph Vuilleumier born. Vuilleumier is known for the Vuilleumier cycle, a thermodynamic cycle with applications in low-temperature cooling. No pics online. | ||1869: Engineer and inventor Rudolph Vuilleumier born. Vuilleumier is known for the Vuilleumier cycle, a thermodynamic cycle with applications in low-temperature cooling. No pics online. | ||
||1877: Ole Evinrude born ... inventor and businessman, invented the outboard motor. Pic search | ||1877: Ole Evinrude born ... inventor and businessman, invented the outboard motor. Pic search. | ||
File:Karl Mikhailovich Peterson.jpg|link=Karl Mikhailovich Peterson (nonfiction)|1881: Mathematician [[Karl Mikhailovich Peterson (nonfiction)|Karl Mikhailovich Peterson]] dies. Peterson discovered equations which were subsequently named the Gauss–Codazzi equations, fundamental to the theory of embedded hypersurfaces in a Euclidean space. | File:Karl Mikhailovich Peterson.jpg|link=Karl Mikhailovich Peterson (nonfiction)|1881: Mathematician [[Karl Mikhailovich Peterson (nonfiction)|Karl Mikhailovich Peterson]] dies. Peterson discovered equations which were subsequently named the Gauss–Codazzi equations, fundamental to the theory of embedded hypersurfaces in a Euclidean space. | ||
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||1902: Chemist Hans von Pechmann dies ... he discovered diazomethane in 1894 ... Pechmann condensation and Pechmann pyrazole synthesis. Pic. | ||1902: Chemist Hans von Pechmann dies ... he discovered diazomethane in 1894 ... Pechmann condensation and Pechmann pyrazole synthesis. Pic. | ||
||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. | ||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. Pic. | ||
||1906: Pierre Curie dies ... physicist and academic, Nobel Prize laureate. Pic. | ||1906: Pierre Curie dies ... physicist and academic, Nobel Prize laureate. Pic. | ||
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||1918: Jørn Utzon born ... designed the Sydney Opera House. Pic. | ||1918: Jørn Utzon born ... designed the Sydney Opera House. Pic. | ||
||11916: Ephraim Shay dies ... engineer, invented the Shay locomotive. Pic search | ||11916: Ephraim Shay dies ... engineer, invented the Shay locomotive. Pic search. | ||
||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. | ||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. | ||
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||1981: The U.S. Navy nuclear submarine USS George Washington accidentally collides with the Nissho Maru, a Japanese cargo ship, sinking it. | ||1981: The U.S. Navy nuclear submarine USS George Washington accidentally collides with the Nissho Maru, a Japanese cargo ship, sinking it. | ||
||2006: Karl Hugo Strunz dies ... mineralogist. He is best known for creating the Nickel-Strunz classification, the ninth edition of which was published together with Ernest Henry Nickel. Pic search | ||2006: Karl Hugo Strunz dies ... mineralogist. He is best known for creating the Nickel-Strunz classification, the ninth edition of which was published together with Ernest Henry Nickel. Pic search. | ||
||2007: Dorrit Hoffleit dies ... astronomer and academic. Pic. | ||2007: Dorrit Hoffleit dies ... astronomer and academic. Pic. | ||
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||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. | ||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. | ||
||2015: Oktay Sinanoğlu dies ... chemist and academic. Pic search | ||2015: Oktay Sinanoğlu dies ... chemist and academic. Pic search. | ||
||2016: Duane Clarridge dies ... American spy. Pic search | ||2016: Duane Clarridge dies ... American spy. Pic search. | ||
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: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]]. | ||
Revision as of 06:18, 19 April 2020
1567: Mathematician, monk, and academic Michael Stifel dies. Stifel was an Augustinian who became an early supporter of Martin Luther.
1860: On his phonautograph machine, Édouard-Léon Scott de Martinville makes the oldest known recording of an audible human voice.
1881: Mathematician Karl Mikhailovich Peterson dies. Peterson discovered equations which were subsequently named the Gauss–Codazzi equations, fundamental to the theory of embedded hypersurfaces in a Euclidean space.
1882: Large herd of Flying bison (Bison pterobonasus) migrates from Periphery to New Minneapolis, Canada.
1912: Chemist Glenn T. Seaborg born. Seaborg will share the 1951 Nobel Prize in Chemistry for the synthesis, discovery, and investigation of transuranium elements.
1914: Mathematician and philosopher Charles Sanders Peirce dies. Peirce is remembered as "the father of pragmatism".
1932: Mathematician Giuseppe Peano publishes new class of Gnomon algorithm functions which use set theory to detect and prevent crimes against mathematical constants.
2016: Chromatographic analysis of Violet Spiral reveals "at least two, probably three" previously unknown shades of violet.
2016: Theoretical physicist, theoretical chemist, and Nobel laureate Walter Kohn dies. Kohn developed density functional theory, which makes it possible to calculate quantum mechanical electronic structure by equations involving the electronic density.
2019: The Great Nerd Giveaway begins. By the end of Minicon 54, hundreds of nerd items will have found new homes, with lots of fun generated in the process.