Template:Selected anniversaries/November 14: Difference between revisions
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||1945: Eldridge Reeves Johnson dies ... businessman and engineer who founded the Victor Talking Machine Company and built it into the leading American producer of phonographs and phonograph records and one of the leading phonograph companies in the world at the time. Pic. | ||1945: Eldridge Reeves Johnson dies ... businessman and engineer who founded the Victor Talking Machine Company and built it into the leading American producer of phonographs and phonograph records and one of the leading phonograph companies in the world at the time. Pic. | ||
||1965: Allen B. DuMont dies ... electronics engineer, scientist and inventor best known for improvements to the cathode ray tube in 1931 for use in television receivers. Seven years later he manufactured and sold the first commercially practical television set to the public. Pic. | |||
||1967: American physicist Theodore Maiman is given a patent for his ruby laser systems, the world's first laser. Pic. | ||1967: American physicist Theodore Maiman is given a patent for his ruby laser systems, the world's first laser. Pic. |
Revision as of 05:07, 29 January 2020
1716: Mathematician and philosopher Gottfried Wilhelm Leibniz dies. He developed differential and integral calculus independently of Isaac Newton, and designed and built mechanical calculators.
1971: Mathematician and academic Hanna Neumann dies. She contributed to group theory, co-authoring the important paper Wreath products and varieties of groups (with her husband Bernhard and eldest son Peter), and authoring the influential book Varieties of Groups.
1971: Mariner 9 enters orbit around Mars. It will map 70% of the surface, and study temporal changes in the atmosphere and surface.
2016: Steganographic analysis of Two Creatures 2 unexpectedly reveals "at least five hundred and twelve kilobytes, possibly a thousand and twenty-four" of previously unknown Gnomon algorithm functions.
2017: Dennis Paulson celebrates forty-sixth anniversary of Mariner 9 entering orbit around Mars.