Template:Selected anniversaries/October 9: Difference between revisions
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||1676: Leeuwenhoek writes to Oldenburg to describe the "little animals" he sees in his microscope. "The 31th of May, I perceived in the same water more of those Animals, as also some that were somewhat bigger. And I imagine, that [ten hundred thousand] of these little Creatures do not equal an ordinary grain of Sand in bigness: And comparing them with a Cheese-mite (which may be seen to move with the naked eye) I make the proportion of one of these small Water-creatures to a Cheese-mite, to be like that of a Bee to a Horse: For, the circumference of one of these little Animals in water, is not so big as the thickness of a hair in a Cheese-mite." | ||1676: Leeuwenhoek writes to Oldenburg to describe the "little animals" he sees in his microscope. "The 31th of May, I perceived in the same water more of those Animals, as also some that were somewhat bigger. And I imagine, that [ten hundred thousand] of these little Creatures do not equal an ordinary grain of Sand in bigness: And comparing them with a Cheese-mite (which may be seen to move with the naked eye) I make the proportion of one of these small Water-creatures to a Cheese-mite, to be like that of a Bee to a Horse: For, the circumference of one of these little Animals in water, is not so big as the thickness of a hair in a Cheese-mite." | ||
||1704: Johann Andreas Segner, German mathematician, physicist, and physician. Pic. | ||1704: Johann Andreas Segner, German mathematician, physicist, and physician. Pic. | ||
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||1858: Mihajlo Pupin born ... physicist and chemist. Pic. | ||1858: Mihajlo Pupin born ... physicist and chemist. Pic. | ||
File:Alfred Dreyfus age 76.jpg|1859: [[Alfred Dreyfus (nonfiction)|Alfred Dreyfus]] born. He will be wrongly convicted of treason during the [[Dreyfus affair (nonfiction)|Dreyfus affair]]. | File:Alfred Dreyfus age 76.jpg|link=Alfred Dreyfus (nonfiction)|1859: [[Alfred Dreyfus (nonfiction)|Alfred Dreyfus]] born. He will be wrongly convicted of treason during the [[Dreyfus affair (nonfiction)|Dreyfus affair]]. | ||
||1869: Otto Linné Erdmann dies ... chemist and academic. He is best known for his work on nickel and indigo and other dye-stuffs. With R. F. Marchand (1813–1850) he also carried out a number of determinations of atomic weights. Pic. | ||1869: Otto Linné Erdmann dies ... chemist and academic. He is best known for his work on nickel and indigo and other dye-stuffs. With R. F. Marchand (1813–1850) he also carried out a number of determinations of atomic weights. Pic. | ||
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||1909: Bailie Hugh Blackburn dies ... mathematician. A lifelong friend of William Thomson (later Lord Kelvin), and the husband of illustrator Jemima Blackburn, he was professor of mathematics at the University of Glasgow from 1849 to 1879. Pic. | ||1909: Bailie Hugh Blackburn dies ... mathematician. A lifelong friend of William Thomson (later Lord Kelvin), and the husband of illustrator Jemima Blackburn, he was professor of mathematics at the University of Glasgow from 1849 to 1879. Pic. | ||
||1911: Luís Antoni Santaló Sors born - mathematician. Pic. | |||
||1912: Qian Weichang born ... physicist and applied mathematician. He was generally acknowledged as one of the pioneers and founders of modern mechanics undertakings in China. His major research activities include; the intrinsic theory of plates and shells, the analysis of large deflection of thin plates and shells, the analysis of corrugated pipes, mechanics of armour penetration, singular perturbation methods, variational principles and generalized variational principles, finite element methods as well as the measurements of atmospheric electricity, spectral analysis of rare-earth elements, wave guide theory, lubrication theory, the development of high-energy batteries, his macro-coding of Chinese characters, etc. The joint work with J. L. Synge on the intrinsic theory of plates and shells is considered as a pioneering classical work in solid mechanics and his successive approximation method of treating large deflection problem is now named as "Chien's method". Pic. | ||1912: Qian Weichang born ... physicist and applied mathematician. He was generally acknowledged as one of the pioneers and founders of modern mechanics undertakings in China. His major research activities include; the intrinsic theory of plates and shells, the analysis of large deflection of thin plates and shells, the analysis of corrugated pipes, mechanics of armour penetration, singular perturbation methods, variational principles and generalized variational principles, finite element methods as well as the measurements of atmospheric electricity, spectral analysis of rare-earth elements, wave guide theory, lubrication theory, the development of high-energy batteries, his macro-coding of Chinese characters, etc. The joint work with J. L. Synge on the intrinsic theory of plates and shells is considered as a pioneering classical work in solid mechanics and his successive approximation method of treating large deflection problem is now named as "Chien's method". Pic. | ||
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||2010: Maurice Allais dies ... economist and physicist, Nobel Prize laureate. Pic. | ||2010: Maurice Allais dies ... economist and physicist, Nobel Prize laureate. Pic. | ||
</gallery> | </gallery> | ||
Latest revision as of 06:06, 15 February 2022
1581: Mathematician and linguist Claude Gaspard Bachet de Méziriac born. He will do work in number theory and find a method of constructing magic squares.
1775: A paper by Leonhard Euler, Speculationes circa quasdam insignes proprietates numerorum, was presented at the Saint-Petersburg Academy. In this paper, he revisits the idea that has come to be called Euler's Phi function. He first introduced the idea to the Academy on Oct 15,1759 but did not include a symbol or name. Euler defined the function as "the multitude of numbers less than D, and which have no common divisor with it."
1859: Alfred Dreyfus born. He will be wrongly convicted of treason during the Dreyfus affair.
1903: "Fightin'" Bert Russell agrees to fight three rounds of bare-knuckled boxing at World Peace Conference.
1918: CIA officer and author E. Howard Hunt born. Along with G. Gordon Liddy, Hunt will plot the Watergate burglaries and other undercover operations for the Nixon administration.
1948: Mathematician Joseph Wedderburn dies. He made significant contributions to algebra, proving that a finite division algebra is a field, and proving part of the Artin–Wedderburn theorem on simple algebras.