Template:Selected anniversaries/April 28: Difference between revisions
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File:Nezahualcoyotl.jpg|link=Nezahualcoyotl (nonfiction)|1402: Aztec philosopher, warrior, architect, poet, and ruler [[Nezahualcoyotl (nonfiction)|Nezahualcoyotl]] born. He will have an experience of an "Unknown, Unknowable Lord of Everywhere" to whom he will build an entirely empty temple in which no blood sacrifices of any kind will be allowed. | File:Nezahualcoyotl.jpg|link=Nezahualcoyotl (nonfiction)|1402: Aztec philosopher, warrior, architect, poet, and ruler [[Nezahualcoyotl (nonfiction)|Nezahualcoyotl]] born. He will have an experience of an "Unknown, Unknowable Lord of Everywhere" to whom he will build an entirely empty temple in which no blood sacrifices of any kind will be allowed. | ||
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||1892: Joseph Dunninger born ... known as "The Amazing Dunninger", was one of the most famous and proficient mentalists of all time. He was one of the pioneer performers of magic on radio and television. A debunker of fraudulent mediums, Dunninger claimed to replicate through trickery all spiritualist phenomena. Pic. | ||1892: Joseph Dunninger born ... known as "The Amazing Dunninger", was one of the most famous and proficient mentalists of all time. He was one of the pioneer performers of magic on radio and television. A debunker of fraudulent mediums, Dunninger claimed to replicate through trickery all spiritualist phenomena. Pic. | ||
||1900: Jan Oort born ... astronomer and academic. | ||1900: Jan Oort born ... astronomer and academic. Pic. | ||
||1903: Josiah Willard Gibbs dies ... scientist who made important theoretical contributions to physics, chemistry, and mathematics. Pic. | ||1903: Josiah Willard Gibbs dies ... scientist who made important theoretical contributions to physics, chemistry, and mathematics. Pic. | ||
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||1906: Richard Rado born ... mathematician whose research concerned combinatorics and graph theory. In graph theory, the Rado graph, a countably infinite graph containing all countably infinite graphs as induced subgraphs, is named after Rado. He rediscovered it in 1964 after previous works on the same graph by Wilhelm Ackermann, Paul Erdős, and Alfréd Rényi. Pic. | ||1906: Richard Rado born ... mathematician whose research concerned combinatorics and graph theory. In graph theory, the Rado graph, a countably infinite graph containing all countably infinite graphs as induced subgraphs, is named after Rado. He rediscovered it in 1964 after previous works on the same graph by Wilhelm Ackermann, Paul Erdős, and Alfréd Rényi. Pic. | ||
||1912: Odette Hallowes born ... soldier and spy. | ||1912: Odette Hallowes born ... soldier and spy, SOE. Pic. | ||
||1918: Frank Shuman dies ... inventor, engineer and solar energy pioneer known for his work on solar engines, especially those that used solar energy to heat water that would produce steam. Pic. | ||1918: Frank Shuman dies ... inventor, engineer and solar energy pioneer known for his work on solar engines, especially those that used solar energy to heat water that would produce steam. Pic. | ||
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||1946: Louis Bachelier dies ... mathematician and academic. Pic. | ||1946: Louis Bachelier dies ... mathematician and academic. Pic. | ||
||1947: Thor Heyerdahl and five crew mates set out from Peru on the Kon-Tiki to prove that Peruvian natives could have settled Polynesia. (... smashing into a reef at Raroia in the Tuamotus on August 7, 1947. The crew made successful landfall and all returned safely.) | ||1947: Thor Heyerdahl and five crew mates set out from Peru on the Kon-Tiki to prove that Peruvian natives could have settled Polynesia. (... smashing into a reef at Raroia in the Tuamotus on August 7, 1947. The crew made successful landfall and all returned safely.) Pic. | ||
||1950: BARK (Swedish: Binär Aritmetisk (Automatisk) Relä-Kalkylator, lit. 'Binary Arithmetic (Automatic) Relay Calculator') becomes operational. BARK was an early electromechanical computer, built using standard telephone relays, implementing a 32-bit binary machine. Pic. | ||1950: BARK (Swedish: Binär Aritmetisk (Automatisk) Relä-Kalkylator, lit. 'Binary Arithmetic (Automatic) Relay Calculator') becomes operational. BARK was an early electromechanical computer, built using standard telephone relays, implementing a 32-bit binary machine. Pic. | ||
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File:Chernobyl disaster.jpg|link=Chernobyl disaster (nonfiction)|1986: High levels of radiation resulting from the [[Chernobyl disaster (nonfiction)|Chernobyl disaster]] are detected at a nuclear power plant in Sweden, leading Soviet authorities to publicly announce the accident. | File:Chernobyl disaster.jpg|link=Chernobyl disaster (nonfiction)|1986: High levels of radiation resulting from the [[Chernobyl disaster (nonfiction)|Chernobyl disaster]] are detected at a nuclear power plant in Sweden, leading Soviet authorities to publicly announce the accident. | ||
File:Radium Jane.jpg|link=Radium Jane|1986: Celebrity time-traveller [[Radium Jane]] visits the stricken [[Chernobyl disaster (nonfiction)|Chernobyl reactor]], calls it "a waste of good fissionable material." | |File:Radium Jane.jpg|link=Radium Jane|1986: Celebrity time-traveller [[Radium Jane]] visits the stricken [[Chernobyl disaster (nonfiction)|Chernobyl reactor]], calls it "a waste of good fissionable material." | ||
||1986: R. H. Bing dies ... mathematician who worked mainly in the areas of geometric topology and continuum theory. Pic: https://www.maa.org/about-maa/governance/maa-presidents/rh-bing-1963-1964-maa-president | ||1986: R. H. Bing dies ... mathematician who worked mainly in the areas of geometric topology and continuum theory. Pic: https://www.maa.org/about-maa/governance/maa-presidents/rh-bing-1963-1964-maa-president | ||
||1987: Ben Linder dies ... engineer and activist ... killed by Contras | ||1987: Ben Linder dies ... engineer and activist ... killed by Contras. Pic. | ||
||1994: Former Central Intelligence Agency counterintelligence officer and analyst Aldrich Ames pleads guilty to giving U.S. secrets to the Soviet Union and later Russia. | ||1994: Former Central Intelligence Agency counterintelligence officer and analyst Aldrich Ames pleads guilty to giving U.S. secrets to the Soviet Union and later Russia. Pic. | ||
||1996: Whitewater controversy: President Bill Clinton gives a 4½ hour videotaped testimony for the defense. | ||1996: Whitewater controversy: President Bill Clinton gives a 4½ hour videotaped testimony for the defense. | ||
||1999: Rolf Landauer dies ... physicist and engineer. He discovered Landauer's principle, that in any logically irreversible operation that manipulates information, such as erasing a bit of memory, entropy increases and an associated amount of energy is dissipated as heat. Pic search | ||1999: Rolf Landauer dies ... physicist and engineer. He discovered Landauer's principle, that in any logically irreversible operation that manipulates information, such as erasing a bit of memory, entropy increases and an associated amount of energy is dissipated as heat. Pic search. | ||
||1999: Arthur Leonard Schawlow dies ... physicist and academic, Nobel Prize laureate ... co-inventor of the laser with Charles Townes. His central insight, which Townes overlooked, was the use of two mirrors as the resonant cavity to take MASER action to visible wavelengths. He shared the 1981 Nobel Prize in Physics with Nicolaas Bloembergen and Kai Siegbahn for his work on lasers. | ||1999: Arthur Leonard Schawlow dies ... physicist and academic, Nobel Prize laureate ... co-inventor of the laser with Charles Townes. His central insight, which Townes overlooked, was the use of two mirrors as the resonant cavity to take MASER action to visible wavelengths. He shared the 1981 Nobel Prize in Physics with Nicolaas Bloembergen and Kai Siegbahn for his work on lasers. Pic. | ||
||2004: Alex Randolph dies ... designer of board games and writer. Randolph's game creations include TwixT, Breakthru, Inkognito (with Leo Colovini), Raj, Ricochet Robot, and Enchanted Forest (with Michael Matschoss). Pic. | ||2004: Alex Randolph dies ... designer of board games and writer. Randolph's game creations include TwixT, Breakthru, Inkognito (with Leo Colovini), Raj, Ricochet Robot, and Enchanted Forest (with Michael Matschoss). Pic. | ||
Revision as of 04:56, 28 April 2020
1402: Aztec philosopher, warrior, architect, poet, and ruler Nezahualcoyotl born. He will have an experience of an "Unknown, Unknowable Lord of Everywhere" to whom he will build an entirely empty temple in which no blood sacrifices of any kind will be allowed.
1693: Gottfried Wilhelm Leibniz writes to L'Hospital, announcing his discovery of determinants fifty years before Cramer, who was the real driving force in the development of determinants. Leibniz's work had little or no influence because it was not published until 1850 in his Mathematische Schriften.
1774: Astronomer Francis Baily born. He will observe "Baily's beads" during an annular eclipse (1836).
1817: Carl Friedrich Gauss writes to the astronomer H. W. M. Oblers, saying, "I am becoming more and more convinced that the necessity of our (Euclidean) geometry cannot be proved, at least not by human intellect nor for the human intellect."
1847: Mathematician Leopold Kronecker uses number theory to predict and prevent crimes against mathematical constants.
1868: Mathematician Georgy Voronoy born. He will invent what are today called Voronoi diagrams or Voronoi tessellations.
1906: Mathematician, philosopher, and academic Kurt Gödel born. His two incompleteness theorems will have an immense impact upon scientific and philosophical thinking in the 20th century.
1928: Geologist and astronomer Eugene Merle Shoemaker born. Shoemaker will be the first scientist to conclude that Barringer Meteor Crater in Arizona, and similar craters, were caused by meteor impact.
1985: A brief, transient outbreak of Geometrical frustration affects nuclear reactors around the world. The outbreak will last only a few microseconds, and there will be no signs of damage to any of the reactors. The event will later be recognized as a precursor to the Chernobyl disaster.
1986: High levels of radiation resulting from the Chernobyl disaster are detected at a nuclear power plant in Sweden, leading Soviet authorities to publicly announce the accident.
2017: New survey shows that Fantasy Voronoi diagram is more popular than Fantasy Football.
2017: Signed first edition of Swirl is purchased for an undisclosed amount by "an eminent Gnomon algorithm theorist living in New Minneapolis, Canada."