Template:Selected anniversaries/February 1: Difference between revisions
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||2000: Henry Berthold Mann dies ... professor of mathematics and statistics at Ohio State University. Mann proved the Schnirelmann-Landau conjecture in number theory. Pic: https://math.osu.edu/about-us/history/henry-berthold-mann | ||2000: Henry Berthold Mann dies ... professor of mathematics and statistics at Ohio State University. Mann proved the Schnirelmann-Landau conjecture in number theory. Pic: https://math.osu.edu/about-us/history/henry-berthold-mann | ||
||2000: Samut Prakan radiation accident: the part of the radiation therapy unit containing the radiation source was acquired by two scrap collectors, who claimed to have bought it from some strangers as scrap metal for resale. They took it home, planning to dismantle it later. On 1 February, the two, together with another two associates, attempted to dismantle the metal part (a 97-kilogram, 42-by-20-centimetre lead cylinder held in a stainless steel casing), which was the unit's source drawer. Using a hammer and chisel, they only managed to crack the welded seam. Two of the men then took the metal piece, along with other scrap metal, to a scrapyard on Soi Wat Mahawong in Phra Pradaeng District, Samut Prakan Province. There they asked a worker at the scrapyard to cut open the cylinder using an oxyacetylene torch. As the cylinder was cut open, two smaller cylindrical metal pieces, which had held the source capsule, fell out. The worker retrieved the two pieces and kept them in the scrapyard, but was unaware of the source capsule itself. The lead cylinder was returned to the scrap collectors for them to complete the disassembly. https://en.wikipedia.org/wiki/Samut_Prakan_radiation_accident | ||2000: Samut Prakan radiation accident: the part of the radiation therapy unit containing the radiation source was acquired by two scrap collectors, who claimed to have bought it from some strangers as scrap metal for resale. They took it home, planning to dismantle it later. On 1 February, the two, together with another two associates, attempted to dismantle the metal part (a 97-kilogram, 42-by-20-centimetre lead cylinder held in a stainless steel casing), which was the unit's source drawer. Using a hammer and chisel, they only managed to crack the welded seam. Two of the men then took the metal piece, along with other scrap metal, to a scrapyard on Soi Wat Mahawong in Phra Pradaeng District, Samut Prakan Province. There they asked a worker at the scrapyard to cut open the cylinder using an oxyacetylene torch. As the cylinder was cut open, two smaller cylindrical metal pieces, which had held the source capsule, fell out. The worker retrieved the two pieces and kept them in the scrapyard, but was unaware of the source capsule itself. The lead cylinder was returned to the scrap collectors for them to complete the disassembly. https://en.wikipedia.org/wiki/Samut_Prakan_radiation_accident Pic. | ||
File:Blue Green Spiral.jpg|link=Blue Green Spiral (nonfiction)|2017: Chromatographic analysis of ''[[Blue Green Spiral (nonfiction)|Blue Green Spiral]]'' reveals previously unknown [[Color (nonfiction)|color]] "midway between [[Blue (nonfiction)|blue]] and [[Green (nonfiction)|green]]." | File:Blue Green Spiral.jpg|link=Blue Green Spiral (nonfiction)|2017: Chromatographic analysis of ''[[Blue Green Spiral (nonfiction)|Blue Green Spiral]]'' reveals previously unknown [[Color (nonfiction)|color]] "midway between [[Blue (nonfiction)|blue]] and [[Green (nonfiction)|green]]." | ||
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Revision as of 21:13, 20 February 2019
1462: Polymath Johannes Trithemius born. He will be remembered as a lexicographer, chronicler, cryptographer, and occultist.
1767: Mathematician and crime-fighter Charles Étienne Louis Camus publishes updated edition of Cours de mathématiques with new section on the detection and prevention of crimes against mathematical constants.
1893: Thomas A. Edison finishes construction of the first motion picture studio, the Black Maria in West Orange, New Jersey.
1903: Physicist and mathematician Sir George Stokes, 1st Baronet dies. He made seminal contributions to fluid dynamics (including the Navier–Stokes equations) and to physical optics.
1934: Mathematician, philosopher, and crime-fighter Imre Lakatos uses his thesis of the fallibility of mathematics and its 'methodology of proofs and refutations' in its pre-axiomatic stages of development to detect and prevent crimes against mathematical constants.
1944: Pultizer Prize awarded to Field Report Number One (Peenemunde edition).
1976: Physicist and academic Werner Heisenberg dies. He introduced the uncertainty principle -- in quantum mechanics, any of a variety of mathematical inequalities asserting a fundamental limit to the precision with which certain pairs of physical properties of a particle can be known.
1976: Mathematician Bertram Kostant uses geometric quantization to detect and record the electroquantum afterlife of Werner Heisenberg.
2017: Chromatographic analysis of Blue Green Spiral reveals previously unknown color "midway between blue and green."