|
|
| Line 1: |
Line 1: |
| <gallery> | | <gallery> |
| || ** DONE: Pat's Blog **
| |
| || *** PAREIDOLIA: Arab thinkers | | || *** PAREIDOLIA: Arab thinkers |
|
| |
| ||3102 B.C. The Kaliyuga begins according to the Indian mathematician Aryabhata (born A.D. 476). He believed all astronomical phenomena were periodic, with period 4,320,000= 20 × 603 years, and that all the planets had mean longitude zero on this date. [College Mathematics Journal, 16 (1985), p. 169.] *VFR https://pballew.blogspot.com/2019/02/on-this-day-in-math-february-18.html
| |
|
| |
|
| File:Thābit's Arabic translation of Apollonius' Conics.jpg|link=Thābit ibn Qurra (nonfiction)|901: Physician, astronomer, and mathematician [[Thābit ibn Qurra (nonfiction)|Thābit ibn Qurra]] dies. He made important discoveries in algebra, geometry, and astronomy; in astronomy, Thabit was one of the first reformers of the Ptolemaic system. | | File:Thābit's Arabic translation of Apollonius' Conics.jpg|link=Thābit ibn Qurra (nonfiction)|901: Physician, astronomer, and mathematician [[Thābit ibn Qurra (nonfiction)|Thābit ibn Qurra]] dies. He made important discoveries in algebra, geometry, and astronomy; in astronomy, Thabit was one of the first reformers of the Ptolemaic system. |
|
| |
|
| File:Nasir_al-Din_al-Tusi_at_observatory.jpg|link=Nasir al-Din al-Tusi (nonfiction)|1201: Polymath [[Nasir al-Din al-Tusi (nonfiction)|Nasir al-Din al-Tusi]] born. Tusi will be a mathematician, architect, philosopher, physician, scientist, and theologian; he will establish trigonometry as a mathematical discipline in its own right. | | File:Nasir_al-Din_al-Tusi_at_observatory.jpg|link=Nasir al-Din al-Tusi (nonfiction)|1201: Polymath [[Nasir al-Din al-Tusi (nonfiction)|Nasir al-Din al-Tusi]] born. Tusi will be a mathematician, architect, philosopher, physician, scientist, and theologian; he will establish trigonometry as a mathematical discipline in its own right. |
|
| |
| ||1535: Heinrich Cornelius Agrippa dies ... magician, astrologer, and theologian. Pic.
| |
|
| |
| ||1547: Bahāʾ al‐Dīn Muḥammad ibn Ḥusayn al‐ʿĀmilī born ... scholar, philosopher, architect, mathematician, astronomer and poet. He was one of the earliest astronomers in the Islamic world to suggest the possibility of the Earth's movement prior to the spread of the Copernican theory. Pic: tapestry?
| |
|
| |
| ||1626: Francesco Redi born ... physician. Pic.
| |
|
| |
| ||1670: “Joannes Georgius Pelshower [Regimontanus Borussus] giving me a visit, and desiring an example of the like, I did that night propose to myself in the dark without help to my memory a number in 53 places: 2468135791011121411131516182017192122242628302325272931 of which I extracted the square root in 27 places: 157103016871482805817152171 proxim´e; which numbers I did not commit to paper till he gave me another visit, March following, when I did from memory dictate them to him.” So wrote John Wallis. [American Journal of Psychology, 4(1891), 38] *VFR https://pballew.blogspot.com/2019/02/on-this-day-in-math-february-18.html Pic.
| |
|
| |
| ||1673: Robert Hooke writes in his Journal: "Bought Copernicus tower hill 2sh " *@HookesLondon Thony Christie points out that current first editions run about 2,500,000 GB Pounds. https://pballew.blogspot.com/2019/02/on-this-day-in-math-february-18.html Pic.
| |
|
| |
| ||1677: Jacques Cassini born ... astronomer, son of the famous Italian astronomer Giovanni Domenico Cassini. Pic.
| |
|
| |
| File:Alessandro Volta.jpg|link=Alessandro Volta (nonfiction)|1745: Physicist and chemist [[Alessandro Volta (nonfiction)|Alessandro Volta]] born. Volta will conduct pioneering experiments in electricity and electrochemistry, discovering the electrical battery; he will also discover methane.
| |
|
| |
| ||1766: A mutiny by captive Malagasy begins at sea on the slave ship ''Meermin'', leading to the ship's destruction on Cape Agulhas in present-day South Africa and the recapture of the instigators. Pic: similar ship.
| |
|
| |
| ||1772 the Royal Danish Academy of Sciences and Letters presented Alexander Wilson with a gold medal for his work on sunspots. Wilson was a Scottish surgeon, type-founder, astronomer, mathematician and meteorologist and the first scientist to record the use of kites in meteorological investigations. Wilson noted that sunspots viewed near the edge of the Sun's visible disk appear depressed below the solar surface, a phenomenon referred to as the Wilson effect. When the Royal Danish Academy of Sciences and Letters announced a prize to be awarded for the best essay on the nature of solar spots, Wilson submitted an entry which won. https://pballew.blogspot.com/2019/02/on-this-day-in-math-february-18.html Pic.
| |
|
| |
| ||1788: John Whitehurst dies ... geologist and clockmaker. Pic.
| |
|
| |
| ||1790: Marshall Hall ... an English physician, physiologist and early neurologist. His name is attached to the theory of reflex arc mediated by the spinal cord, to a method of resuscitation of drowned people, and to the elucidation of function of capillary vessels. Pic.
| |
|
| |
| ||1818: Alexander Forbes Irvine dies ... amateur astronomer. Pic.
| |
|
| |
| ||1832: Octave Chanute born ... civil engineer and aviation pioneer, born in France. He provided many budding enthusiasts, including the Wright brothers, with help and advice, and helped to publicize their flying experiments. At his death he was hailed as the father of aviation and the heavier-than-air flying machine. Pic.
| |
|
| |
| ||1838: Ernst Mach born ... physicist and philosopher. Pic.
| |
|
| |
| ||1844: Jacob Lüroth born ... mathematician who proved Lüroth's theorem and introduced Lüroth quartics. Pic.
| |
|
| |
| ||1849: Jérôme Eugène Coggia born ... astronomer and discoverer of asteroids and comets. Pic search.
| |
|
| |
|
| File:Carl Gustav Jacob Jacobi.jpg|link=Carl Gustav Jacob Jacobi (nonfiction)|1851: Mathematician and academic [[Carl Gustav Jacob Jacobi (nonfiction)|Carl Gustav Jacob Jacobi]] dies. He made fundamental contributions to elliptic functions, dynamics, differential equations, and number theory. | | File:Carl Gustav Jacob Jacobi.jpg|link=Carl Gustav Jacob Jacobi (nonfiction)|1851: Mathematician and academic [[Carl Gustav Jacob Jacobi (nonfiction)|Carl Gustav Jacob Jacobi]] dies. He made fundamental contributions to elliptic functions, dynamics, differential equations, and number theory. |
|
| |
| ||1856: Baron Wilhelm von Biela dies ... military officer and amateur astronomer. Pic.
| |
|
| |
| ||1871: Harry Brearley born ... inventor, stainless steel. Pic.
| |
|
| |
| ||1871: George Udny Yule born ... statistician. He will make important contributions to the theory and practice of correlation, regression, and association, as well as to time series analysis. He pioneered the use of preferential attachment stochastic processes to explain the origin of power law distribution. The Yule distribution, a discrete power law, is named after him. Pic.
| |
|
| |
| ||1880: Nikolay Zinin dies ... organic chemist. Pic: Extreme Moustache!
| |
|
| |
| File:Marius Sophus Lie.jpg|link=Marius Sophus Lie (nonfiction)|1899: Mathematician and academic [[Marius Sophus Lie (nonfiction)|Marius Sophus Lie]] dies. He largely created the theory of continuous symmetry and applied it to the study of geometry and differential equations.
| |
|
| |
| ||1900: Eugenio Beltrami dies ... mathematician notable for his work concerning differential geometry and mathematical physics. His work was noted especially for clarity of exposition. Pic.
| |
|
| |
| ||1906: Hans Asperger born ... physician and psychologist. Pic.
| |
|
| |
| ||1913: Chemist Frederick Soddy introduced the term "isotope". Soddy was an English chemist and physicist who received the Nobel Prize for Chemistry in 1921 for investigating radioactive substances. He suggested that different elements produced in different radioactive transformations were capable of occupying the same place on the Periodic Table, and on 18 Feb 1913 he named such species "isotopes" from Greek words meaning "same place." He is credited, along with others, with the discovery of the element protactinium in 1917. *TIS https://pballew.blogspot.com/2019/02/on-this-day-in-math-february-18.html Pic.
| |
|
| |
| ||1919: Clifford Truesdell born ... mathematician, natural philosopher, and historian of science. Pic.
| |
|
| |
| File:Clyde W. Tombaugh.jpg|link=Clyde Tombaugh (nonfiction)|1930: While studying photographs taken in January, astronomer [[Clyde Tombaugh (nonfiction)|Clyde Tombaugh]] discovers Pluto.
| |
|
| |
| ||1931: Johnny Hart born ... cartoonist, co-created The Wizard of Id.
| |
|
| |
| ||1943: World War II: The Nazis arrest the members of the White Rose movement.
| |
|
| |
| ||1944: Charles Davenport dies ... eugenicist and biologist. He was one of the leaders of the American eugenics movement. Pic.
| |
|
| |
| ||1955: Operation Teapot: Teapot test shot "Wasp" is successfully detonated at the Nevada Test Site with a yield of 1.2 kilotons. Wasp is the first of fourteen shots in the Teapot series.
| |
|
| |
| ||1957: Henry Norris Russell dies ... astronomer who, along with Ejnar Hertzsprung, developed the Hertzsprung–Russell diagram (1910). Pic.
| |
|
| |
| ||1957: Joseph Gilbert Hamilton dies ... professor of Medical Physics, Experimental Medicine, General Medicine, and Experimental Radiology as well as director (1948-1957) of the Crocker Laboratory, part of the Lawrence Berkeley National Laboratory.
| |
|
| |
| ||1960: Hermann Pokorny dies. He was a World War I Austro-Hungarian Army cryptologist whose work with Russian ciphers contributed substantially to Central Powers victories over Russia. Pic.
| |
|
| |
| ||1964: Joseph-Armand Bombardier dies ... inventor and businessman, founded Bombardier Inc. Pic.
| |
|
| |
|
| File:J. Robert Oppenheimer.jpg|link=J. Robert Oppenheimer (nonfiction)|1967: American physicist and academic [[J. Robert Oppenheimer (nonfiction)|J. Robert Oppenheimer]] dies. His achievements in physics included the Born–Oppenheimer approximation for molecular wavefunctions, work on the theory of electrons and positrons, the Oppenheimer–Phillips process in nuclear fusion, and the first prediction of quantum tunneling. Oppenheimer has been called the "father of the atomic bomb" for his role in the Manhattan Project. | | File:J. Robert Oppenheimer.jpg|link=J. Robert Oppenheimer (nonfiction)|1967: American physicist and academic [[J. Robert Oppenheimer (nonfiction)|J. Robert Oppenheimer]] dies. His achievements in physics included the Born–Oppenheimer approximation for molecular wavefunctions, work on the theory of electrons and positrons, the Oppenheimer–Phillips process in nuclear fusion, and the first prediction of quantum tunneling. Oppenheimer has been called the "father of the atomic bomb" for his role in the Manhattan Project. |
|
| |
| ||1970: The Chicago Seven are found not guilty of conspiring to incite riots at the 1968 Democratic National Convention.
| |
|
| |
| ||1973: Frank Costello dies ... gangster.
| |
|
| |
| ||1977: The Space Shuttle Enterprise test vehicle is carried on its maiden "flight" on top of a Boeing 747.
| |
|
| |
| ||1981: Jack Northrop dies ... engineer and businessman, founded the Northrop Corporation ... Flying wing.
| |
|
| |
| ||1995: Thede Palm dies ... Swedish historian of religion, director of research and head of military intelligence. Pic search.
| |
|
| |
| ||2001: FBI agent Robert Hanssen is arrested for spying for the Soviet Union. He is ultimately convicted and sentenced to life imprisonment.
| |
|
| |
| ||2006 The game of Connect Four was first solved by James D. Allen (Oct 1, 1988), and independently by Victor Allis (Oct 16, 1988). First player can force a win. Strongly solved by John Tromp's 8-ply database (Feb 4, 1995). It was weakly solved for all boardsizes where width+height is at most 15 (Feb 18, 2006). *Wik https://pballew.blogspot.com/2019/02/on-this-day-in-math-february-18.html
| |
|
| |
| File:Clock Head 2.jpg|link=Clock Head 2|2017: Steganographic analysis of [[Clock Head 2]] illustration reveal "nearly a gigabyte of encrypted data."
| |
|
| |
|
| |
|
| </gallery> | | </gallery> |
