Template:Selected anniversaries/May 28: Difference between revisions
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||Alfred Otto Carl Nier (b. May 28, 1911) was an American physicist who pioneered the development of mass spectrometry. He was the first to use mass spectrometry to isolate uranium-235 which was used to demonstrate that 235U could undergo fission and developed the sector mass spectrometer configuration now known as Nier-Johnson geometry. Pic. | ||Alfred Otto Carl Nier (b. May 28, 1911) was an American physicist who pioneered the development of mass spectrometry. He was the first to use mass spectrometry to isolate uranium-235 which was used to demonstrate that 235U could undergo fission and developed the sector mass spectrometer configuration now known as Nier-Johnson geometry. Pic. | ||
||Paul-Émile Lecoq de Boisbaudran (d. 28 May 1912), was a French chemist known for his discoveries of the chemical elements gallium, samarium and dysprosium. Pic. | |||
||1912 – Herman Johannes, Indonesian scientist, academic, and politician (d. 1992) | ||1912 – Herman Johannes, Indonesian scientist, academic, and politician (d. 1992) | ||
Revision as of 13:28, 1 April 2018
1829: Army officer, trader, and lecturer John Cleves Symmes, Jr. dies. He invented a variant of the Hollow Earth Theory, with openings to the inner world at the poles.
1834: Inventor and engineer Charles Grafton Page uses Gnomon algorithm functions to disprove Hollow Earth Theory.
1936: Computer scientist, mathematician, logician, cryptanalyst and theoretical biologist Alan Turing submits On Computable Numbers for publication.
2015: Information scientist Claire Kelly Schultz dies.