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Väisälä Comparator , a periodic comet in the solar system
{{DEFAULTSORT:Vaisala ...
Väisälä may refer to: * Vaisala, Samoa, a village in the island of Savai'i * Vilho Väisälä (1889–1969), Finnish meteorologist and physicist ** Vaisala, a company founded by Vilho Väisälä * Yrjö Väisälä (1891–1971), Finnish astronomer and physicist ** 1573 Väisälä, a main belt asteroid ** Väisälä (crater), a lunar impact crater See also * Brunt–Väisälä frequency * Schmidt-Väisälä camera, an astronomical telescope * 139P/Väisälä–Oterma 139P/Väisälä–Oterma is a periodic comet in the Solar System. When it was discovered in 1939 it was not recognized as a comet and designated as asteroid An asteroid is a minor planet of the inner Solar System. Sizes and shapes of astero ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vaisala, Samoa
Vaisala is a small village on the northwest coast of Savai'i island in Samoa. The village lies within the political district of Vaisigano. The village's population is 465. It is located close to the coast in the northwestern corner of the island. To the west are the neighbouring villages of Auala and Asau. A significant family from Vaisala is the Va'ai family. Va'ai Kolone, a ''matai'', was a Member of Parliament of the Vaisala area who became a Prime Minister of Samoa twice in the 1980s. A progressive leader, he was also the founder the Human Rights Protection Party The Human Rights Protection Party (HRPP, sm, Vaega Faaupufai e Puipuia Aia Tatau a Tagata) is a Samoan political party. It was founded in 1982 and dominated Samoan party politics for decades thereafter, leading every government until their defea ... which has since been the dominant party in Samoan politics and currently in power. Va'ai Kolone's father, a government clerk in the German administration of S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vilho Väisälä
Vilho Väisälä (; September 28, 1889 – August 12, 1969) was a Finnish meteorologist and physicist, and founder of Vaisala Oyj. After graduation in mathematics in 1912, Väisälä worked for the Finnish Meteorological Institute in ''aerological measurements'', specializing in the research of the higher troposphere. At the time the measurements were conducted by attaching a thermograph to a kite. In 1917 he published his dissertation in mathematics ''Ensimmäisen lajin elliptisen integralin käänteisfunktion yksikäsitteisyys'' (The single-valuedness of the inverse function of the elliptic integral of the first kind). His dissertation was the first and still is the only mathematical doctoral thesis written in the Finnish language.Lehto, Olli: Oman tien kulkijat. Helsinki: Otava, 2004. . Page 101 Väisälä participated in development of radiosonde, a device attached to a balloon and launched to measure air in the higher atmosphere. In 1936 he started his own company, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vaisala
Vaisala Oyj () is a Finnish company that develops, manufactures and markets products and services for environmental and industrial measurement. Their major customer groups and markets are national meteorological and hydrological services, aviation authorities, defense forces, road authorities, the weather critical energy sector, life science and high-technology industries and building automation. Vaisala had over 1,900 employees and net sales of €379.5 million in 2020. Vaisala serves customers in more than 150 countries. The parent company Vaisala Oyj, domicile in Vantaa, Finland, is listed on the NASDAQ OMX Helsinki. Vaisala Group has offices and operations in Finland, the United States, Australia, Brazil, Canada, China, France, Germany, India, Italy, Japan, Kenya, Malaysia, México, South Korea, Sweden, United Arab Emirates, and the United Kingdom. History Vaisala originated in the 1930s when Professor Vilho Väisälä (1889–1969), Vaisala's founder and long-time manag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yrjö Väisälä
Yrjö Väisälä (; 6 September 1891 – 21 July 1971) was a Finnish astronomer and physicist. His main contributions were in the field of optics. He was also active in geodetics, astronomy and optical metrology. He had an affectionate nickname of ''Wizard of Tuorla'' (Observatory/Optics laboratory), and a book with the same title in Finnish describes his works. His discoveries include 128 minor planets and 3 comets. His brothers were mathematician Kalle Väisälä (1893–1968) and meteorologist Vilho Väisälä (1889–1969). His daughter Marja Väisälä (1916–2011) was an astronomer and discoverer of minor planets. Väisälä was a fervent supporter of Esperanto, presiding over the ''Internacia Scienca Asocio Esperantista'' ("International Association of Esperanto Scientists") in 1968. Optician He developed several methods for measuring the quality of optical elements, as well as a lot of practical methods of manufacturing said elements. This allowed the constru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1573 Väisälä
1573 Väisälä, provisional designation , is a stony Phocaea asteroid, slow rotator and suspected tumbler from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 27 October 1949, by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle, Belgium. It was named for Finnish astronomer Yrjö Väisälä. Orbit and classification The stony S-type asteroid is a member of the Phocaea family (), a group of asteroids with similar orbital characteristics. It orbits the Sun at a distance of 1.8–2.9 AU once every 3 years and 8 months (1,334 days). Its orbit has an eccentricity of 0.23 and an inclination of 25 ° with respect to the ecliptic. ''Väisälä''s observation arc begins on the night following its official discovery observation at Uccle, as no precoveries were taken and no prior identifications were made. Physical characteristics Slow rotator In September 2011, a rotational lightcurve o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Väisälä (crater)
Väisälä is a tiny Lunar craters, lunar impact crater located on a rise in the Oceanus Procellarum. Sharing the same continental island are the brilliant crater Aristarchus (crater), Aristarchus to the south-southeast and Herodotus (crater), Herodotus to the south-southwest. Väisälä lies just to the west of the Rupes Toscanelli fault line, and the Rimae Aristarchus rille system. To the southwest is the notable Vallis Schröteri cleft. This formation is circular and cup-shaped, with a higher albedo than the surrounding dark surface. It was previously designated Aristarchus A before being named after prolific Finnish astronomer Yrjö Väisälä by the International Astronomical Union, IAU in 1973. See also * 1573 Väisälä , minor planet * 2804 Yrjö, minor planet References * * * * * * * * * * * * {{DEFAULTSORT:Vaisala Impact craters on the Moon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brunt–Väisälä Frequency
In atmospheric dynamics, oceanography, asteroseismology and geophysics, the Brunt–Väisälä frequency, or buoyancy frequency, is a measure of the stability of a fluid to vertical displacements such as those caused by convection. More precisely it is the frequency at which a vertically displaced parcel will oscillate within a statically stable environment. It is named after David Brunt and Vilho Väisälä. It can be used as a measure of atmospheric stratification. Derivation for a general fluid Consider a parcel of water or gas that has density \rho_0. This parcel is in an environment of other water or gas particles where the density of the environment is a function of height: \rho = \rho (z). If the parcel is displaced by a small vertical increment z', ''and it maintains its original density, so that its volume does not change,'' it will be subject to an extra gravitational force against its surroundings of: :\rho_0 \frac = - g \left[\rho (z)-\rho (z+z')\right] where g is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
