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T. O. Engset
Tore Olaus Engset (May 8, 1865 – October, 1943 in Oslo) was a Norwegian mathematician and engineer who did pioneering work in the field of telephone traffic queuing theory. Tore Olaus Engset was born at Stranda in Møre og Romsdal, Norway. After he graduated school at the age of 18, Engset was admitted to the telegraph school in Stavanger in 1883. He received his certificate in a year and took employment. In his spare time he continued his studies, graduating in 1892 but continuing his university studies. Engset received an M.Sc. in physics and mathematics in 1894 at University of Oslo, after which he worked at Televerket as office worker, traffic analyst and from 1921 to 1922 and 1930–35 director general A director general or director-general (plural: ''directors general'', ''directors-general'', ''director generals'' or ''director-generals'' ) or general director is a senior executive officer, often the chief executive officer, within a governmen .... He develop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Engset Formula
In queueing theory, the Engset formula is used to determine the blocking probability of an M/M/c/c/N queue (in Kendall's notation). The formula is named after its developer, T. O. Engset. Example application Consider a fleet of c vehicles and N operators. Operators enter the system randomly to request the use of a vehicle. If no vehicles are available, a requesting operator is "blocked" (i.e., the operator leaves without a vehicle). The owner of the fleet would like to pick c small so as to minimize costs, but large enough to ensure that the blocking probability is tolerable. Formula Let * c > 0 be the (integer) number of servers. * N > c be the (integer) number of sources of traffic; * \lambda > 0 be the idle source arrival rate (i.e., the rate at which a free source initiates requests); * h > 0 be the average holding time (i.e., the average time it takes for a server to handle a request); Then, the probability of blocking is given by :P=\frac. By rearranging terms, one ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norwegian Mathematicians
A mathematician is a scholar in the fields of mathematics. They solve and research mathematical problems which can be applied in real life or completely abstract (pure). This article covers notable mathematicans from Norway. A pioneer of modern mathematics, Niels Henrik Abel contributed greatly towards various fields of mathematics during his short life. He died in 1829, aged 26, from tuberculosis. German mathematician Felix Klein spoke of his reluctance "to part from this ideal type of researcher". In 2001, the Abel Prize was established in his honour. Other notable mathematicians include (in alphabetical order) Carl Anton Bjerknes, Vilhelm Bjerknes, Bernt Michael Holmboe, who is known for being Abel's teacher and tutor, Sophus Lie, Idun Reiten, Atle Selberg, Thoralf Skolem and Carl Størmer. Alphabetical order ''"Aa" appears under "å" as they are considered different representations of the same letter.'' See also *Archiv for Mathematik og Naturvidenskab * Bjerknes (lu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Oslo Alumni
A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. ''University'' is derived from the Latin phrase ''universitas magistrorum et scholarium'', which roughly means "community of teachers and scholars". Universities typically offer both undergraduate and postgraduate programs. The first universities in Europe were established by Catholic Church monks. The University of Bologna (), Italy, which was founded in 1088, is the first university in the sense of: *being a high degree-awarding institute. *using the word ''universitas'' (which was coined at its foundation). *having independence from the ecclesiastic schools and issuing secular as well as non-secular degrees (with teaching conducted by both clergy and non-clergy): grammar, rhetoric, logic, theology, canon law, notarial law.Hunt Janin: "The university in medieval life, 1179–1499", McFarland, 2008, , p. 55f.de Ridder-Symoens, Hild ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Stranda
A person ( : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The plural form "people" is often used to refer to an entire nation or ethnic group (as in "a people"), and this was the original meaning of the word; it subsequently acquired its use as a plural form of p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1943 Deaths
Events Below, the events of World War II have the "WWII" prefix. January * January 1 – WWII: The Soviet Union announces that 22 German divisions have been encircled at Stalingrad, with 175,000 killed and 137,650 captured. * January 4 – WWII: Greek-Polish athlete and saboteur Jerzy Iwanow-Szajnowicz is executed by the Germans at Kaisariani. * January 11 ** The United States and United Kingdom revise previously unequal treaty relationships with the Republic of China. ** Italian-American anarchist Carlo Tresca is assassinated in New York City. * January 13 – Anti- Nazi protests in Sofia result in 200 arrests and 36 executions. * January 14 – 24 – WWII: Casablanca Conference: Franklin D. Roosevelt, President of the United States; Winston Churchill, Prime Minister of the United Kingdom; and Generals Charles de Gaulle and Henri Giraud of the Free French forces meet secretly at the Anfa Hotel in Casablanca, Morocco, to plan the Allied European strategy for t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1865 Births
Events January–March * January 4 – The New York Stock Exchange opens its first permanent headquarters at 10-12 Broad near Wall Street, in New York City. * January 13 – American Civil War : Second Battle of Fort Fisher: United States forces launch a major amphibious assault against the last seaport held by the Confederates, Fort Fisher, North Carolina. * January 15 – American Civil War: United States forces capture Fort Fisher. * January 31 ** The Thirteenth Amendment to the United States Constitution (conditional prohibition of slavery and involuntary servitude) passes narrowly, in the House of Representatives. ** American Civil War: Confederate General Robert E. Lee becomes general-in-chief. * February ** American Civil War: Columbia, South Carolina burns, as Confederate forces flee from advancing Union forces. * February 3 – American Civil War : Hampton Roads Conference: Union and Confederate leaders discuss peace terms. * Febr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annalen Der Physik
''Annalen der Physik'' (English: ''Annals of Physics'') is one of the oldest scientific journals on physics; it has been published since 1799. The journal publishes original, peer-reviewed papers on experimental, theoretical, applied, and mathematical physics and related areas. The editor-in-chief is Stefan Hildebrandt. Prior to 2008, its ISO 4 abbreviation was ''Ann. Phys. (Leipzig)'', after 2008 it became ''Ann. Phys. (Berl.)''. The journal is the successor to , published from 1790 until 1794, and ', published from 1795 until 1797. The journal has been published under a variety of names (', ', ', ''Wiedemann's Annalen der Physik und Chemie'') during its history. History Originally, was published in German, then a leading scientific language. From the 1950s to the 1980s, the journal published in both German and English. Initially, only foreign authors contributed articles in English but from the 1970s German-speaking authors increasingly wrote in English in order to reac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Physics
Nuclear physics is the field of physics that studies atomic nuclei and their constituents and interactions, in addition to the study of other forms of nuclear matter. Nuclear physics should not be confused with atomic physics, which studies the atom as a whole, including its electrons. Discoveries in nuclear physics have led to applications in many fields. This includes nuclear power, nuclear weapons, nuclear medicine and magnetic resonance imaging, industrial and agricultural isotopes, ion implantation in materials engineering, and radiocarbon dating in geology and archaeology. Such applications are studied in the field of nuclear engineering. Particle physics evolved out of nuclear physics and the two fields are typically taught in close association. Nuclear astrophysics, the application of nuclear physics to astrophysics, is crucial in explaining the inner workings of stars and the origin of the chemical elements. History The history of nuclear physics as a di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arne Myskja
Arne may refer to: Places * Arne, Dorset, England, a village ** Arne RSPB reserve, a nature reserve adjacent to the village * Arné, Hautes-Pyrénées, Midi-Pyrénées, France * Arne (Boeotia), an ancient city in Boeotia, Greece * Arne (Thessaly), an ancient city in Thessaly, Greece * Arne, or modern Tell Aran, an ancient Arameans city near Aleppo, Syria * Arne Township, Benson County, North Dakota, United States * 959 Arne, an asteroid People * Arne (name), a given name and a surname, including a list of people with the name * Arne & Carlos, a Norwegian design duo Mythology * Arne (Greek myth), three figures in Greek mythology See also * Aarne Aarne as a surname may refer to: * Antti Aarne (1867–1925), Finnish folklorist *Els Aarne (1917–1995), Estonian composer * Johan Victor Aarne (1863–1934), Finnish metalsmith As a given name it may refer to: * Aarne Ahi (born 1943), Estoni ... * Aarne–Thompson classification systems * Arn (other) {{disambiguatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Director-general
A director general or director-general (plural: ''directors general'', ''directors-general'', ''director generals'' or ''director-generals'' ) or general director is a senior executive officer, often the chief executive officer, within a governmental, statutory, NGO, third sector or not-for-profit institution. The term is commonly used in many countries worldwide, but with various meanings. Australia In most Australian states, the director-general is the most senior civil servant in any government department, reporting only to the democratically elected minister representing that department. In Victoria and the Australian Government, the equivalent position is the secretary of the department. The Australian Defence Force Cadets has three Directors-General which are all one-star ranks: *Director-General of the Australian Navy Cadets *Director-General of the Australian Army Cadets *Director-General of the Australian Air Force Cadets Canada In Canada, the title director gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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