Template:Selected anniversaries/April 30: Difference between revisions

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File:Oronce Finé.jpg|link=Oronce Finé (nonfiction)|1523: Mathematician and cartographer [[Oronce Finé (nonfiction)|Oronce Finé]] uses [[Judicial astrology (nonfiction)|Judicial astrology]] to detect and prevent [[crimes against astronomical constants]].
||Robert Plot (d. 30 April 1696) was an English naturalist, first Professor of Chemistry at the University of Oxford, and the first keeper of the Ashmolean Museum. Pic.
File:Carl Friedrich Gauss 1840 by Jensen.jpg|link=Carl Friedrich Gauss (nonfiction)|1777: Mathematician, astronomer, and physicist [[Carl Friedrich Gauss (nonfiction)|Carl Friedrich Gauss]] born. He will have an exceptional influence in many fields of mathematics and science and be ranked as one of history's most influential mathematicians.
File:Carl Friedrich Gauss 1840 by Jensen.jpg|link=Carl Friedrich Gauss (nonfiction)|1777: Mathematician, astronomer, and physicist [[Carl Friedrich Gauss (nonfiction)|Carl Friedrich Gauss]] born. He will have an exceptional influence in many fields of mathematics and science and be ranked as one of history's most influential mathematicians.
File:Gambling Den Fight.jpg|link=Gambling Den Fight|1874: Scene from ''[[Gambling Den Fight]]'' adapted for opera by [[John Havelock]], performed at theaters across Europe to rave reviews.
||1876 – Orso Mario Corbino, Italian physicist and politician (d. 1937). Pic.


File:J_J_Thomson.jpg|link=J. J. Thomson (nonfiction)|1897: [[J. J. Thomson (nonfiction)|J. J. Thomson]] of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
File:J_J_Thomson.jpg|link=J. J. Thomson (nonfiction)|1897: [[J. J. Thomson (nonfiction)|J. J. Thomson]] of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.


||Sergey Mikhailovich Nikolsky (b. 30 April 1905) was a Russian mathematician. Nikolsky made fundamental contributions to functional analysis, approximation of functions, quadrature formulas, enclosed functional spaces and their applications to variational solutions of partial differential equations. Pic.
File:Genevieve_Grotjan_Feinstein.jpg|link=Genevieve Grotjan Feinstein (nonfiction)|1913: Mathematician and cryptanalyst [[Genevieve Grotjan Feinstein (nonfiction)|Genevieve Grotjan Feinstein]] born. Feinstein will work for the Signals Intelligence Service throughout World War II, playing an important role in deciphering the Japanese cryptography machine Purple, and will later work on the Cold War-era Venona project.
 
File:Albert Einstein 1921.jpg|link=Albert Einstein (nonfiction)|1905: [[Albert Einstein (nonfiction)|Albert Einstein]] writes his thesis Eine neue Bestimmung der Moleküldimensionen ("A New Determination of Molecular Dimensions").
 
||Erhard Heinz (b. 30 April 1924) was a German mathematician known for his work on partial differential equations, in particular the Monge–Ampère equation. In 1994 he was awarded the Cantor medal. Pic.
 
||Raghu Raj Bahadur (b. 30 April 1924) was an Indian statistician considered by peers to be "one of the architects of the modern theory of mathematical statistics". Pic.
 
||Orso Mario Corbino (d. 23 January 1937, Rome) was an Italian physicist and politician. Pic.


File:Claude Shannon.jpg|link=Claude Shannon (nonfiction)|1916: Mathematician, engineer, and information scientist [[Claude Shannon (nonfiction)|Claude Shannon]] born. He will be  known as "the father of information theory".
File:Claude Shannon.jpg|link=Claude Shannon (nonfiction)|1916: Mathematician, engineer, and information scientist [[Claude Shannon (nonfiction)|Claude Shannon]] born. He will be  known as "the father of information theory".
File:Einstein drumming.jpg|link=Albert Einstein|1916: Jazz drummer and theoretical crime-fighter [[Albert Einstein]] stops the [[Forbidden Ratio]] from kidnapping newborn infant [[Claude Shannon (nonfiction)|Claude Shannon]].
||Gerda Hedwig Lerner (b. April 30, 1920) was an Austrian-born American historian and author.
||1921 – Roger L. Easton, American scientist, co-invented the GPS (d. 2014). Pic.
||1943 – World War II: The British submarine HMS Seraph surfaces near Huelva to cast adrift a dead man dressed as a courier and carrying false invasion plans.
|File:Glenn Seaborg.jpg|link=Glenn T. Seaborg (nonfiction)|1961: Chemist [[Glenn T. Seaborg (nonfiction)|Glenn T. Seaborg]] discovers new hydrogen isotope with important applications in the diagnosis and treatment of [[crimes against chemical constants]].
||1961 – K-19, the first Soviet nuclear submarine equipped with nuclear missiles, is commissioned.
File:Ralph Hartley.jpg|link=Ralph Hartley (nonfiction)|1964:  Electronics researcher and Gnomon algorithm theorist [[Ralph Hartley (nonfiction)|Ralph Hartley]] uses the Hartley oscillator to detect and erase the [[Forbidden Ratio]].


File:Nixon April-29-1974.jpg|link=Watergate scandal (nonfiction)|1973: [[Watergate scandal (nonfiction)|Watergate]]: U.S. President Richard Nixon announces that White House Counsel John Dean has been fired and that other top aides, most notably H. R. Haldeman and John Ehrlichman, have resigned.
File:Nixon April-29-1974.jpg|link=Watergate scandal (nonfiction)|1973: [[Watergate scandal (nonfiction)|Watergate]]: U.S. President Richard Nixon announces that White House Counsel John Dean has been fired and that other top aides, most notably H. R. Haldeman and John Ehrlichman, have resigned.


||1993 – CERN announces World Wide Web protocols will be free.
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||Edwin Thompson Jaynes (d. April 30, 1998) was the Wayman Crow Distinguished Professor of Physics at Washington University in St. Louis. He wrote extensively on statistical mechanics and on foundations of probability and statistical inference, initiating in 1957 the MaxEnt interpretation of thermodynamics, as being a particular application of more general Bayesian/information theory techniques (although he argued this was already implicit in the works of Gibbs). Jaynes strongly promoted the interpretation of probability theory as an extension of logic.
{{Template:Categories: April 30}}
 
||2011 – Ernesto Sabato, Argentinian physicist, author, and painter (b. 1911).
 
||Sir Harold Walter Kroto FRS (d. 30 April 2016), known as Harry Kroto, was an English chemist. He shared the 1996 Nobel Prize in Chemistry with Robert Curl and Richard Smalley for their discovery of fullerenes.  Pic.
 
File:Green Sprouts.jpg|link=Green Sprouts (nonfiction)|2018: Chromatographic analysis of ''[[Green Sprouts (nonfiction)|Green Sprouts]]'' unexpectedly reveals "at least thirty-five kilobytes" of encrypted data, apparently a previously unknown [[Gnomon algorithm]] function related to the color [[Green (nonfiction)|green]].
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Latest revision as of 07:18, 30 April 2024

  • 1777: Mathematician, astronomer, and physicist Carl Friedrich Gauss born. He will have an exceptional influence in many fields of mathematics and science and be ranked as one of history's most influential mathematicians.

    1777: Mathematician, astronomer, and physicist Carl Friedrich Gauss born. He will have an exceptional influence in many fields of mathematics and science and be ranked as one of history's most influential mathematicians.

  • 1897: J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.

    1897: J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.

  • 1913: Mathematician and cryptanalyst Genevieve Grotjan Feinstein born. Feinstein will work for the Signals Intelligence Service throughout World War II, playing an important role in deciphering the Japanese cryptography machine Purple, and will later work on the Cold War-era Venona project.

    1913: Mathematician and cryptanalyst Genevieve Grotjan Feinstein born. Feinstein will work for the Signals Intelligence Service throughout World War II, playing an important role in deciphering the Japanese cryptography machine Purple, and will later work on the Cold War-era Venona project.

  • 1916: Mathematician, engineer, and information scientist Claude Shannon born. He will be known as "the father of information theory".

    1916: Mathematician, engineer, and information scientist Claude Shannon born. He will be known as "the father of information theory".

  • 1973: Watergate: U.S. President Richard Nixon announces that White House Counsel John Dean has been fired and that other top aides, most notably H. R. Haldeman and John Ehrlichman, have resigned.

    1973: Watergate: U.S. President Richard Nixon announces that White House Counsel John Dean has been fired and that other top aides, most notably H. R. Haldeman and John Ehrlichman, have resigned.

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