Template:Selected anniversaries/April 22: Difference between revisions

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||1953: Jan Czochralski dies ... was a Polish chemist ... pioneer in semi conductor industry. He discovered the Czochralski method in 1916, when he accidentally dipped his pen into a crucible of molten tin rather than his inkwell. He immediately pulled his pen out to discover that a thin thread of solidified metal was hanging from the nib. The nib was replaced by a capillary, and Czochralski verified that the crystallized metal was a single crystal. Pic.
||1953: Jan Czochralski dies ... was a Polish chemist ... pioneer in semi conductor industry. He discovered the Czochralski method in 1916, when he accidentally dipped his pen into a crucible of molten tin rather than his inkwell. He immediately pulled his pen out to discover that a thin thread of solidified metal was hanging from the nib. The nib was replaced by a capillary, and Czochralski verified that the crystallized metal was a single crystal. Pic.
File:J._R._Oppenheimer.jpg|link=J. R. Oppenheimer|1953: Singer-physicist [[J. R. Oppenheimer]] performs his hit song "Destroyer of Worlds" at the Grand Ole Opry, leading to his being summoned before the [[House Un-American Activities Committee (nonfiction)|House Un-American Activities Committee]].


File:McCarthy Cohn 1954.jpg|link=Army–McCarthy hearings (nonfiction)|1954: Red Scare: Witnesses begin testifying and live television coverage of the [[Army–McCarthy hearings (nonfiction)|Army–McCarthy]] hearings begins.
File:McCarthy Cohn 1954.jpg|link=Army–McCarthy hearings (nonfiction)|1954: Red Scare: Witnesses begin testifying and live television coverage of the [[Army–McCarthy hearings (nonfiction)|Army–McCarthy]] hearings begins.

Revision as of 05:58, 21 April 2022

  • 1592: Minister, scholar, astronomer, mathematician, cartographer, and inventor Wilhelm Schickard born. He will design and build calculating machines, and invent techniques for producing improved maps.

    1592: Minister, scholar, astronomer, mathematician, cartographer, and inventor Wilhelm Schickard born. He will design and build calculating machines, and invent techniques for producing improved maps.

  • 1833: Engineer and explorer Richard Trevithick dies. He was an early pioneer of steam-powered road and rail transport, developing the first high-pressure steam engine, and building the first full-scale working railway steam locomotive.

    1833: Engineer and explorer Richard Trevithick dies. He was an early pioneer of steam-powered road and rail transport, developing the first high-pressure steam engine, and building the first full-scale working railway steam locomotive.

  • 1904: American physicist and academic J. Robert Oppenheimer born. His achievements in physics will include the Born–Oppenheimer approximation for molecular wavefunctions, and the first prediction of quantum tunneling. Oppenheimer will be called the "father of the atomic bomb" for his role in the Manhattan Project.

    1904: American physicist and academic J. Robert Oppenheimer born. His achievements in physics will include the Born–Oppenheimer approximation for molecular wavefunctions, and the first prediction of quantum tunneling. Oppenheimer will be called the "father of the atomic bomb" for his role in the Manhattan Project.

  • 1954: Red Scare: Witnesses begin testifying and live television coverage of the Army–McCarthy hearings begins.

    1954: Red Scare: Witnesses begin testifying and live television coverage of the Army–McCarthy hearings begins.

  • 1970: The first Earth Day is celebrated.

    1970: The first Earth Day is celebrated.

  • 1978: Optical fiber is first used to carry live telephone traffic.

    1978: Optical fiber is first used to carry live telephone traffic.

  • 2006: Computer scientist and academic Henriette Avram dies. She developed the MARC (Machine Readable Cataloging) format, the international data standard for bibliographic and holdings information in libraries.

    2006: Computer scientist and academic Henriette Avram dies. She developed the MARC (Machine Readable Cataloging) format, the international data standard for bibliographic and holdings information in libraries.

  • 2016: Physicist and academic Denys Wilkinson dies. Wilkinson's work in nuclear physics included investigation of the properties of nuclei with low numbers of nucleons. He was amongst the first to experimentally test rules relating to isospin. He also applied concepts from physics to the study of bird navigation. He invented the Wilkinson Analog-to-Digital Converter in the course of his experimental work.

    2016: Physicist and academic Denys Wilkinson dies. Wilkinson's work in nuclear physics included investigation of the properties of nuclei with low numbers of nucleons. He was amongst the first to experimentally test rules relating to isospin. He also applied concepts from physics to the study of bird navigation. He invented the Wilkinson Analog-to-Digital Converter in the course of his experimental work.

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