|
Sigve Tjøtta
Sigve Tjøtta (1 March 1930 – 28 August 2023) was a Norwegian mathematician. Early life He was born in Klepp. He took the cand.real. degree in 1954 and the dr.philos. degree in 1960, both at the University of Oslo. His doctoral thesis was ''On Some Non-linear Effects in Sound Fields, with Special Emphasis on the Generation of Vorticity and the Formation of Streaming Patterns''. He worked as a research assistant in Oslo from 1954 to 1956, 1957 to 1958 and 1959 to 1960. In between he studied at Brown University from 1956 to 1957 and at the Max Planck Institute. Among his advisors were Johan Peter Holtsmark. Career He was appointed docent at the University of Bergen in 1960, and was promoted to professor in 1963. He succeeded Oddvar Bjørgum, and had responsibility for the university's education in applied mathematics. His fields of research include Plasma (physics), plasma, nonlinear acoustics, hydroacoustics and acoustic streaming. He was also the dean of the University of Bergen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Klepp
Klepp is a municipality in Rogaland county, Norway. It is located in the traditional district of Jæren. The administrative centre of the municipality is the village of Kleppe. Other villages in Klepp include Klepp stasjon, Orre, Orstad, Pollestad, Verdalen, and Voll. Klepp is a flat and open agricultural landscape. The highest point, ''Tinghaug'', is at above sea level. There are long stretches of sand beaches along the North Sea coastline in the west. The municipality is the 324th largest by area out of the 356 municipalities in Norway. Klepp is the 63rd most populous municipality in Norway with a population of 20,163. The municipality's population density is and its population has increased by 13.6% over the previous 10-year period. The population around Kleppe is growing rapidly, mostly in the form of suburban single-family homes, but also in the form of some apartment blocks. There is a shopping mall in Kleppe called ''Jærhagen''. General information The old pari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oddvar Bjørgum
Oddvar is a given name. Notable people with the given name include: *Oddvar Barlie (1929–2017), Norwegian sport wrestler *Oddvar Berrefjord (1918-1999), Norwegian jurist and politician *Oddvar Brå (born 1951), Norwegian former cross-country skier *Oddvar Einarson (born 1949), Norwegian movie director *Oddvar Flæte (born 1944), Norwegian politician and civil servant * Oddvar Hansen (1921–2011), Norwegian footballer and coach *Oddvar Igland (born 1963), Norwegian politician *Oddvar Klepperås, Norwegian handball player *Oddvar Nes (1938–2016), Norwegian linguist *Oddvar Wenner Nilssen (1920–1979), Norwegian sports shooter *Oddvar Reiakvam (born 1985), Norwegian politician *Oddvar Rønnestad (1935–2014), Norwegian alpine skier *Oddvar Saga (1934–2000), Norwegian ski jumper *Oddvar Sponberg (1914–1975), Norwegian race walker *Oddvar Stenstrøm (born 1946), Norwegian journalist and television host *Oddvar Torsheim (born 1938), Norwegian painter, illustrator and musician *O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Half Marathon
A half marathon is a road running event of —half the distance of a marathon. It is common for a half marathon event to be held concurrently with a marathon or a 5K race, using almost the same course with a late start, an early finish or shortcuts. If finisher medals are awarded, the medal or ribbon may differ from those for the full marathon. The half marathon is also known as a 21K, 21.1K or 13.1 miles, although these values are rounded and not formally correct. A half marathon world record is officially recognised by the International Association of Athletics Federations. The official IAAF world record for men is 57:31, set by Jacob Kiplimo of Uganda in November 2021 in Lisbon, Portugal, and for women is 1:04:02, set by Ruth Chepng'etich of Kenya on April 4, 2021, in Istanbul, Turkey. Participation in half marathons has grown steadily since 2003, partly because it is a challenging distance, but does not require the same level of training that a marathon does. In 2008, ''Runn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marathon
The marathon is a long-distance foot race with a distance of , usually run as a road race, but the distance can be covered on trail routes. The marathon can be completed by running or with a run/walk strategy. There are also wheelchair divisions. More than 800 marathons are held throughout the world each year, with the vast majority of competitors being recreational athletes, as larger marathons can have tens of thousands of participants. The marathon was one of the original modern Olympic events in 1896. The distance did not become standardized until 1921. The distance is also included in the World Athletics Championships, which began in 1983. It is the only running road race included in both championship competitions (walking races on the roads are also contested in both). History Origin The name ''Marathon'' comes from the legend of Philippides (or Pheidippides), the Greek messenger. The legend states that, while he was taking part in the Battle of Marathon, whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jogging
Jogging is a form of trotting or running at a slow or leisurely pace. The main intention is to increase physical fitness with less stress on the body than from faster running but more than walking, or to maintain a steady speed for longer periods of time. Performed over long distances, it is a form of aerobic endurance training. Definition Jogging is running at a gentle pace; its definition, as compared with running, is not standard. In general, jogging speed is between Running is sometimes defined as requiring a moment of no contact to the ground, whereas jogging often sustains the contact. History The word ''jog'' originated in England in the mid-16th century. The etymology of the word is unknown, but it may be related to ''shog'' or have been a new invention. In 1593, William Shakespeare wrote in ''Taming of the Shrew'', "you may be jogging whiles your boots are green". At that point, it usually meant to leave. The term ''jog'' was often used in English and North American l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Long-distance Running
Long-distance running, or endurance running, is a form of continuous running over distances of at least . Physiologically, it is largely aerobic in nature and requires stamina as well as mental strength. Within endurance running comes two different types of respiration. The more prominent side that runners experience more frequently is aerobic respiration. This occurs when oxygen is present, and the body is able to utilize oxygen to help generate energy and muscle activity. On the other side, anaerobic respiration occurs when the body is deprived of oxygen, and this is common towards the final stretch of races when there is a drive to speed up to a greater intensity. Overall, both types of respiration are used by endurance runners quite often, but are very different from each other. Among mammals, humans are well adapted for running significant distances, and particularly so among primates. The capacity for endurance running is also found in migratory ungulates and a li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oslo
Oslo ( , , or ; sma, Oslove) is the capital and most populous city of Norway. It constitutes both a county and a municipality. The municipality of Oslo had a population of in 2022, while the city's greater urban area had a population of in 2019, and the metropolitan area had an estimated population of in 2021. During the Viking Age the area was part of Viken. Oslo was founded as a city at the end of the Viking Age in 1040 under the name Ánslo, and established as a ''kaupstad'' or trading place in 1048 by Harald Hardrada. The city was elevated to a bishopric in 1070 and a capital under Haakon V of Norway around 1300. Personal unions with Denmark from 1397 to 1523 and again from 1536 to 1814 reduced its influence. After being destroyed by a fire in 1624, during the reign of King Christian IV, a new city was built closer to Akershus Fortress and named Christiania in honour of the king. It became a municipality ('' formannskapsdistrikt'') on 1 January 1838. The city fu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Honeymoon
A honeymoon is a vacation taken by newlyweds immediately after their wedding, to celebrate their marriage. Today, honeymoons are often celebrated in destinations considered exotic or romantic. In a similar context, it may also refer to the phase in a couple's relationship - whether they are in matrimony or not - that exists before one becomes a burden to the other. History In Western culture and some westernized countries' cultures, the custom of a newlywed couple's going on a holiday together originated in early-19th-century Great Britain. Upper-class couples would take a "bridal tour", sometimes accompanied by friends or family, to visit relatives who had not been able to attend the wedding. The practice soon spread to the European continent and was known in France as a ''voyage à la façon anglaise'' (translation: English-style voyage), from the 1820s onwards. Honeymoons in the modern sense—a pure holiday voyage undertaken by the couple—became widespread during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Union Of Theoretical And Applied Mechanics
The International Union for Theoretical and Applied Mechanics (IUTAM) is an affiliation of about 500 mechanicians in about 50 countries, and involving about 20 associated organizations, including the International Council for Science (ICSU). The proceedings of symposia organized by IUTAM are published as ''Procedia IUTAM''. from The IUTAM was organized in 1946 at the sixth International Congress of Applied Mechanics in . The ICAM first met in 1924 at , |
NAVF
The Norwegian Research Council for Science and the Humanities (Norges almenvitenskapelige forskningsråd, NAVF) was one of Norway's five research councils. It was established in 1949. NAVF was responsible for funding the natural sciences. In 1993, the five research councils merged into the present Norwegian Research Council The Research Council (also the Research Council of Norway; no, Norges forskningsråd) is a Norwegian government agency that funds research and innovation projects. On behalf of the Government, the Research Council invests NOK 11,9 billion (2021) .... Organizations established in 1949 Research institutes in Norway {{norway-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acoustic Streaming
Acoustic streaming is a steady flow in a fluid driven by the absorption of high amplitude acoustic oscillations. This phenomenon can be observed near sound emitters, or in the standing waves within a Kundt's tube. Acoustic streaming was explained first by Lord Rayleigh in 1884. It is the less-known opposite of sound generation by a flow. There are two situations where sound is absorbed in its medium of propagation: * during propagation in bulk flow ('Eckart streaming'). The attenuation coefficient is \alpha=2\eta\omega^2/(3\rho c^3), following Stokes' law (sound attenuation). This effect is more intense at elevated frequencies and is much greater in air (where attenuation occurs on a characteristic distance \alpha^~10 cm at 1 MHz) than in water (\alpha^~100 m at 1 MHz). In air it is known as the ''Quartz wind''. * near a boundary ('Rayleigh streaming'). Either when sound reaches a boundary, or when a boundary is vibrating in a still medium. A wall vibrating para ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
