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G A Campbell
George Ashley Campbell (November 27, 1870 – November 10, 1954) was an American engineer. He was a pioneer in developing and applying quantitative mathematical methods to the problems of long-distance telegraphy and telephony. His most important contributions were to the theory and implementation of the use of loading coils and the first wave filters designed to what was to become known as the image method. Both these areas of work resulted in important economic advantages for the American Telephone and Telegraph Company (AT&T). Education Campbell was educated at the McCollom Institute in New Hampshire and then at MIT, where he graduated in 1891. He then received a master's degree from Harvard University in 1893. He was awarded a fellowship which enabled him to spend three years on graduate work; one year studying advanced mathematics under Felix Klein at Göttingen, one year studying electricity and mechanics under Ludwig Boltzmann in Vienna, and one year studying under H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hastings, Minnesota
Hastings ( ) is a city mostly in Dakota County, Minnesota, Dakota County, Minnesota, of which it is the county seat, with a portion in Washington County, Minnesota, Washington County, Minnesota, United States. It is near the confluence of the Mississippi River, Mississippi, Vermillion, and St. Croix River (Wisconsin-Minnesota), St. Croix Rivers. The population was 22,154 at the 2020 United States census, 2020 census. It is named for the first elected governor of Minnesota, Henry Hastings Sibley. The advantages of Hastings's location that led to its original growth are that it is well-drained, provides a good riverboat port, and is close to a hydropower resource at the falls of the Vermillion River (Minnesota), Vermillion River. Other sites closer to the river confluence are either too swampy (Dakota County) or too hilly (Washington County and Pierce County, Wisconsin). U.S. Route 61 in Minnesota, U.S. Highway 61 and Minnesota State Highways Minnesota State Highway 55, 55 and Mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henri Poincaré
Jules Henri Poincaré (, ; ; 29 April 185417 July 1912) was a French mathematician, Theoretical physics, theoretical physicist, engineer, and philosophy of science, philosopher of science. He is often described as a polymath, and in mathematics as "The Last Universalist", since he excelled in all fields of the discipline as it existed during his lifetime. He has further been called "the Carl Friedrich Gauss, Gauss of History of mathematics, modern mathematics". Due to his success in science, along with his influence and philosophy, he has been called "the philosopher par excellence of modern science". As a mathematician and physicist, he made many original fundamental contributions to Pure mathematics, pure and applied mathematics, mathematical physics, and celestial mechanics. In his research on the three-body problem, Poincaré became the first person to discover a chaotic deterministic system which laid the foundations of modern chaos theory. Poincaré is regarded as the cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
