Template:Selected anniversaries/October 23: Difference between revisions

Revision as of 06:18, 17 September 2018

1590: Astronomer and crime analyst Tycho Brahe publicly accuses rogue astronomers associated with the House of Malevecchio of committing a series of high-profile crimes against astronomical constants.
1634: Minister, scholar, astronomer, mathematician, and crime-fighter Wilhelm Schickard writes two letters, each describing a new technique for detecting and preventing crimes against astronomical constants.
1873: Physicist and engineer William D. Coolidge born. He will make major contributions to X-ray machines, and develop ductile tungsten for incandescent light bulbs.
1973: Watergate scandal: President Richard M. Nixon agrees to turn over subpoenaed audio tapes of his Oval Office conversations.
2014: Physicist and academic Tullio Regge dies. In 1968 he and G. Ponzano developed a quantum version of Regge calculus in three space-time dimensions now known as the Ponzano-Regge model; this was the first of a whole series of state sum models for quantum gravity known as spin foam models.
2016: Steganographic analysis of The Eel Time-Surfing reveals quantum gravity control software based on spin foam models.

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 ||1842: Henry Harrison Chase Dunwoody born. Known in his own time for his work with the Army’s Weather Bureau, Dunwoody invented the carborundum radio detector in 1906. It was the first practical mineral radio wave detector and the first commercial semiconductor device. Pic.
+||1852: De Morgan conveyed Four Color Problem to Hamilton, writing, "A student of mine asked me today to give him a reason for a fact which I did not know was a fact—and do not yet. He says that if a figure be anyhow divided and the compartments differently coloured so that the figures with any portion of common boundary line are differently coloured—four colours may be wanted, but not more… Query cannot a necessity for five or more be invented."
 File:William_D._Coolidge.jpg|link=William D. Coolidge (nonfiction)|1873: Physicist and engineer [[William D. Coolidge (nonfiction)|William D. Coolidge]] born. He will make major contributions to X-ray machines, and develop ductile tungsten for incandescent light bulbs.