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Emory Leon Chaffee
Emory Leon Chaffee (April 15, 1885 – March 8, 1975) was an American physicist. He was a professor at Harvard University from 1911 to 1953. Chaffee was born in Somerville, Massachusetts. He studied electrical engineering and received his bachelor's degree from MIT in 1907. Afterward he made further studies at the Harvard University and took his master's degree and his Ph.D. He was made an instructor in electrical engineering in 1911 and got a position as assistant professor of physics in 1917. In 1923 he became an associate professor and a professor in 1926. He was appointed Rumford Professor of Physics in 1940, and Gordon McKay Professor of applied physics in 1946. Chaffee became chairman of the Department of Engineering Sciences and Applied Physics from 1949 till 1952. Chaffee was awarded the IEEE Medal of Honor in 1959. He was best known for his work on thermionic vacuum tubes. In 1911 he invented the concept of the Chaffee Gap which was a way of producing continuous os ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Somerville, Massachusetts
Somerville ( ) is a city located directly to the northwest of Boston, and north of Cambridge, Massachusetts, Cambridge, in Middlesex County, Massachusetts, United States. As of the 2020 United States Census, the city had a total population of 81,045 people. With an area of , the city has a density of , making it the most densely populated municipality in New England and the List of United States cities by population density, 16th most densely populated incorporated municipality in the country. Somerville was established as a town in 1842, when it was separated from Charlestown, Massachusetts, Charlestown. In 2006, the city was named the best-run city in Massachusetts by ''The Boston Globe''. In 1972, 2009, and 2015, the city received the All-America City Award. It is home to Tufts University, which has its campus along the Somerville and Medford, Massachusetts, Medford border. History Early settlement The territory now comprising the city of Somerville was first settled by Euro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaffee Gap
Chaffee or Chafee may refer to: Places United States * Chaffee, Missouri, a city * Chaffee, New York, a hamlet * Chaffee, North Dakota, an unincorporated community * Chaffee, West Virginia, an extinct town * Chaffee County, Colorado * Lake Chaffee, Connecticut ** Lake Chaffee (CDP), Connecticut, lakeside community Outer space * Chaffee (crater), on the far side of the Moon * Chaffee Hill, unofficial name of one of the Apollo 1 Hills on Mars In the military * M24 Chaffee, a World War II and later light tank *Fort Chaffee Maneuver Training Center, Arkansas, previously named Camp Chaffee, then Fort Chaffee * (DDG-90), a guided missile destroyer *, a World War II destroyer escort People *Chaffee (surname), a list of people with the surname Chaffee or Chafee Other uses * Fresno Chaffee Zoo, Fresno, California * Chaffee Art Center, Rutland, Vermont See also *Roger B. Chaffee Planetarium *Loomis Chaffee The Loomis Chaffee School (; LC or Loomis) is a selective independent, coeduca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harvard University Faculty
Harvard University is a private Ivy League research university in Cambridge, Massachusetts. Founded in 1636 as Harvard College and named for its first benefactor, the Puritan clergyman John Harvard, it is the oldest institution of higher learning in the United States and one of the most prestigious and highly ranked universities in the world. The university is composed of ten academic faculties plus Harvard Radcliffe Institute. The Faculty of Arts and Sciences offers study in a wide range of undergraduate and graduate academic disciplines, and other faculties offer only graduate degrees, including professional degrees. Harvard has three main campuses: the Cambridge campus centered on Harvard Yard; an adjoining campus immediately across Charles River in the Allston neighborhood of Boston; and the medical campus in Boston's Longwood Medical Area. Harvard's endowment is valued at $50.9 billion, making it the wealthiest academic institution in the world. Endowment inco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harvard University Alumni
The list of Harvard University people includes notable graduates, professors, and administrators affiliated with Harvard University. For a list of notable non-graduates of Harvard, see notable non-graduate alumni of Harvard. For a list of Harvard's presidents, see President of Harvard University. Eight President of the United States, Presidents of the United States have graduated from Harvard University: John Adams, John Quincy Adams, Rutherford B. Hayes, John F. Kennedy, Franklin Delano Roosevelt, Theodore Roosevelt, George W. Bush, and Barack Obama. Bush graduated from Harvard Business School, Hayes and Obama from Harvard Law School, and the others from Harvard College. Over 150 Nobel Prize winners have been associated with the university as alumni, researchers or faculty. Nobel laureates Pulitzer Prize winners ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1975 Deaths
It was also declared the ''International Women's Year'' by the United Nations and the European Architectural Heritage Year by the Council of Europe. Events January * January 1 - Watergate scandal (United States): John N. Mitchell, H. R. Haldeman and John Ehrlichman are found guilty of the Watergate cover-up. * January 2 ** The Federal Rules of Evidence are approved by the United States Congress. ** Bangladesh revolutionary leader Siraj Sikder is killed by police while in custody. ** A bomb blast at Samastipur, Bihar, India, fatally wounds Lalit Narayan Mishra, Minister of Railways. * January 5 – Tasman Bridge disaster: The Tasman Bridge in Hobart, Tasmania, Australia, is struck by the bulk ore carrier , killing 12 people. * January 7 – OPEC agrees to raise crude oil prices by 10%. * January 10–February 9 – The flight of ''Soyuz 17'' with the crew of Georgy Grechko and Aleksei Gubarev aboard the ''Salyut 4'' space station. * January 15 – Alvor Agreement: Portuga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1885 Births
Events January–March * January 3– 4 – Sino-French War – Battle of Núi Bop: French troops under General Oscar de Négrier defeat a numerically superior Qing Chinese force, in northern Vietnam. * January 4 – The first successful appendectomy is performed by Dr. William W. Grant, on Mary Gartside. * January 17 – Mahdist War in Sudan – Battle of Abu Klea: British troops defeat Mahdist forces. * January 20 – American inventor LaMarcus Adna Thompson patents a roller coaster. * January 24 – Irish rebels damage Westminster Hall and the Tower of London with dynamite. * January 26 – Mahdist War in Sudan: Troops loyal to Mahdi Muhammad Ahmad conquer Khartoum; British commander Charles George Gordon is killed. * February 5 – King Leopold II of Belgium establishes the Congo Free State, as a personal possession. * February 9 – The first Japanese arrive in Hawaii. * February 16 – Charles Dow publishes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Massachusetts
Massachusetts (Massachusett language, Massachusett: ''Muhsachuweesut [Massachusett writing systems, məhswatʃəwiːsət],'' English: , ), officially the Commonwealth of Massachusetts, is the most populous U.S. state, state in the New England region of the Northeastern United States. It borders on the Atlantic Ocean and Gulf of Maine to the east, Connecticut and Rhode Island to the south, New Hampshire and Vermont to the north, and New York (state), New York to the west. The state's capital and List of municipalities in Massachusetts, most populous city, as well as its cultural and financial center, is Boston. Massachusetts is also home to the urban area, urban core of Greater Boston, the largest metropolitan area in New England and a region profoundly influential upon American History of the United States, history, academia, and the Economy of the United States, research economy. Originally dependent on agriculture, fishing, and trade. Massachusetts was transformed into a manuf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vacuum Tube
A vacuum tube, electron tube, valve (British usage), or tube (North America), is a device that controls electric current flow in a high vacuum between electrodes to which an electric voltage, potential difference has been applied. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot cathode for fundamental electronic functions such as signal amplifier, amplification and current rectifier, rectification. Non-thermionic types such as a vacuum phototube, however, achieve electron emission through the photoelectric effect, and are used for such purposes as the detection of light intensities. In both types, the electrons are accelerated from the cathode to the anode by the electric field in the tube. The simplest vacuum tube, the diode (i.e. Fleming valve), invented in 1904 by John Ambrose Fleming, contains only a heated electron-emitting cathode and an anode. Electrons can only flow in one direction through the device—fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waltham, Massachusetts
Waltham ( ) is a city in Middlesex County, Massachusetts, United States, and was an early center for the labor movement as well as a major contributor to the American Industrial Revolution. The original home of the Boston Manufacturing Company, the city was a prototype for 19th century industrial city planning, spawning what became known as the Waltham-Lowell system of labor and production. The city is now a center for research and higher education, home to Brandeis University and Bentley University as well as industrial powerhouse Raytheon Technologies. The population was 65,218 at the census in 2020. Waltham has been called "watch city" because of its association with the watch industry. Waltham Watch Company opened its factory in Waltham in 1854 and was the first company to make watches on an assembly line. It won the gold medal in 1876 at the Philadelphia Centennial Exposition. The company produced over 35 million watches, clocks and instruments before it closed in 1957. Histo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rumford Chair Of Physics
The Rumford Chair of Physics (originally the Rumford Chair and Lectureship on the Application of Science to the Useful Arts) is an endowed professorship established at Harvard University in 1816 under the will of Benjamin Thompson, Count Rumford. Endowment Specifically, an initial annuity of $1000 (with reversion of certain further substantial annuities) was bequeathed “for the purpose of founding a new institution and professorship, in order to teach by regular courses of academical and public lectures, accompanied with proper experiments, the utility of the physical and mathematical sciences for the improvement of the useful arts, and for the extension of the industry, prosperity, happiness, and well-being of society.” The centrality of “useful” knowledge, in contradistinction to the classical tradition then dominant at Harvard, was further emphasised by a stipulation that the professorship was to be held outside of the philosophy department. History The first incu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
