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Rho (other)
Rho (Ρ or ρ) is a letter of the Greek alphabet. __NOTOC__ Rho or RHO also may refer to: Science and medicine * Rho family of GTPases :* RHOA :* RHOB :* RhoC * RHO (gene), or Rhodopsin ρ as a conventional symbol ;in mathematics * A length coordinate in coordinate systems with both length and angle coordinates: ** Polar coordinate system ** Spherical coordinate system ** Cylindrical coordinate system ** Toroidal coordinate system ** Toroidal and poloidal coordinates of the Earth's magnetic field * Spectral radius of a square matrix * Pollard's rho algorithm * Pollard's rho algorithm for logarithms * Prime constant * Plastic number ;in physics * Density of a material * Volume charge density * Resistivity of a material * Rho meson ;in biology * Rho factor protein in RNA transcription termination * Ecology, population damping ratio where ρ = λ1 / , λ2, . ;in statistics * Spearman's rank correlation coefficient * Pearson product-moment correlation coefficient ;in other f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rho Family Of GTPases
The Rho family of GTPases is a family of small (~21 kDa) signaling G proteins, and is a subfamily of the Ras superfamily. The members of the Rho GTPase family have been shown to regulate many aspects of intracellular actin dynamics, and are found in all eukaryotic kingdoms, including yeasts and some plants. Three members of the family have been studied in detail: Cdc42, Rac1, and RhoA. All G proteins are "molecular switches", and Rho proteins play a role in organelle development, cytoskeletal dynamics, cell movement, and other common cellular functions. History Identification of the Rho family of GTPases began in the mid-1980s. The first identified Rho member was RhoA, isolated serendipitously in 1985 from a low stringency cDNA screening. Rac1 and Rac2 were identified next, in 1989 followed by Cdc42 in 1990. Eight additional mammalian Rho members were identified from biological screenings until the late 1990s, a turning point in biology where availability of complete genome seq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resistivity
Electrical resistivity (also called specific electrical resistance or volume resistivity) is a fundamental property of a material that measures how strongly it resists electric current. A low resistivity indicates a material that readily allows electric current. Resistivity is commonly represented by the Greek letter (rho). The SI unit of electrical resistivity is the ohm-meter (Ω⋅m). For example, if a solid cube of material has sheet contacts on two opposite faces, and the resistance between these contacts is , then the resistivity of the material is . Electrical conductivity or specific conductance is the reciprocal of electrical resistivity. It represents a material's ability to conduct electric current. It is commonly signified by the Greek letter ( sigma), but (kappa) (especially in electrical engineering) and (gamma) are sometimes used. The SI unit of electrical conductivity is siemens per metre (S/m). Resistivity and conductivity are intensi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodes International Airport
Rhodes International Airport "Diagoras" (Greek: Διεθνής Αερολιμένας Ρόδου "Διαγόρας"), or Diagoras International Airport , is located on the West side of the island of Rhodes in Greece. The facility is located just north of the village Paradeisi, about 14 km southwest of the capital city, Rodos. Rhodes International Airport was the fourth busiest airport in Greece as of 2019, with 5,542,567 passengers utilizing the airport. History Civil aviation on Rhodes started after the Second World War, on the location of the nearby military Rhodes Maritsa Airport. This was the island's main airport until 1977, when the new Rhodes International Airport was opened. The need for a new facility was big, as the 'old' Maritsa airport did not meet the needs for a modern civil airport. The new "Diagoras" airport was built in 1977. It was decided that, on this location, it would meet the needs of the island better. Improvements have been made to the airp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Hot Organization
Red Hot Organization (RHO) is a not-for-profit, 501(c) 3, international organization dedicated to fighting AIDS through pop culture. Since its inception in 1989, over 400 artists, producers and directors have contributed to over 15 compilation albums, related television programs and media events to raise donations totaling more than 10 million dollars for HIV / AIDS relief and awareness around the world. The Red Hot Organization Collection was donated to Fales Library in New York City in 2006. Mission Red Hot is a not-for-profit production company that has produced 16 albums and dedicated more than 10 million dollars to worthy organizations, causes and pro-social projects around the world. Its mission is to raise awareness and money to fight AIDS/HIV and related health and social issues. In 2010, donations from the proceeds of its latest album alone surpassed $1 million mark—with funds going to benefit: Partners In Health Partners In Health (PIH) is an international no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Contract Bridge Glossary
These terms are used in contract bridge, using duplicate or rubber scoring. Some of them are also used in whist, bid whist, the obsolete game auction bridge, and other trick-taking games. This glossary supplements the Glossary of card game terms. : ''In the following entries,'' boldface links ''are external to the glossary and'' plain links ''reference other glossary entries.'' 0–9 ;: A mnemonic for the original (Roman) response structure to the Roman Key Card Blackwood convention. It represents "3 or 0" and "1 or 4", meaning that the lowest step response (5) to the 4NT key card asking bid shows responder has three or zero keycards and the next step (5) shows one or four. ;: A mnemonic for a variant response structure to the Roman Key Card Blackwood convention. It represents "1 or 4" and "3 or 0", meaning that the lowest step response (5) to the 4NT key card asking bid shows responder has one or four keycards and the next step (5) shows three or zero. ;1RF: One round forc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dora Di Bardonecchia
The Dora di Bardonecchia is a short tributary of the Dora Riparia river, lying entirely within the upper Susa Valley in the Metropolitan City of Turin, Piedmont, Italy. Geography It originates just outside Bardonecchia from the confluence of mountain streams from the valleys of Rochemolles, Frejus, Rho, and Valle Stretta. It follows the valley for about and joins the Dora Riparia northeast of Oulx. Several major road and rail lines run parallel to the river: the A32 motorway from Torino to Bardonecchia; state highway SS535, ''Strada Statale di Bardonecchia''; the international double-track Fréjus railway, the main line of the Rome-Torino-Paris Paris () is the capital and most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), making it the 30th most densely populated city in the world in 2020. S ... run. Notes Other projects Rivers of the Alps Rivers of the Province of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ro, Greece
Ro or Rho ( el, Ρω) is a small Greek island in the eastern Mediterranean Sea, more precisely in the Levantine Sea, near Kastellorizo, close to the Turkish coast. It is part of the municipality of Megísti (Kastellorizo) in the South Aegean region. Description Together with other islets in the surrounding region, Ro was the object of a sovereignty dispute in the 1920s between Turkey and Italy, which at the time was in possession of Kastellorizo and the Dodecanese islands. The dispute was solved in a 1932 treaty, which assigned Ro to the Kingdom of Italy. It came under Greek sovereignty in 1947, together with the other former Italian possessions in the Aegean. The islet is named ''Kara Ada'' ("black island") in Turkish. History Anciently, the island was known as Rhoge ( grc, Ῥώγη). An inhabitant of the island was called Rogaeus ( grc, Ῥωγαῖος). Ancient fortifications show that during the Hellenistic period and later, there was a small garrison post on the is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rho, Lombardy
Rho (; ; ) is a town and ''comune'' (municipality) in the Metropolitan City of Milan in the Italian region of Lombardy, located about northwest of Milan. The language spoken in Rho is Italian. Geography Rho is lapped by the river Olona and crossed by its tributaries Bozzente and Lura, nowadays partially cloaked inside the town. At the north and east of the town, there is the road of national interest Strada statale 33 del Sempione, which in the past was crossing the town itself, in the current ''corso Europa''. Rho is at the meeting point of railways linking Milan to Varese ( Line S5) and Domodossola and Milan to Novara ( Line S6). In Passirana, it is based a meteo station, managed in cooperation with the Lombard Meteorological Center. Frazioni Inside the municipality of Rho are located seven frazioni: * Castellazzo: modest inhabited in the west part of the communal territory, close to the place where was situated a country manor house; nowadays it is located near the popu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rho (finance)
In mathematical finance, the Greeks are the quantities representing the sensitivity of the price of derivatives such as options to a change in underlying parameters on which the value of an instrument or portfolio of financial instruments is dependent. The name is used because the most common of these sensitivities are denoted by Greek letters (as are some other finance measures). Collectively these have also been called the risk sensitivities, risk measures or hedge parameters. Use of the Greeks The Greeks are vital tools in risk management. Each Greek measures the sensitivity of the value of a portfolio to a small change in a given underlying parameter, so that component risks may be treated in isolation, and the portfolio rebalanced accordingly to achieve a desired exposure; see for example delta hedging. The Greeks in the Black–Scholes model are relatively easy to calculate, a desirable property of financial models, and are very useful for derivatives traders, especia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hammett Equation
The Hammett equation in organic chemistry describes a linear free-energy relationship relating reaction rates and equilibrium constants for many reactions involving benzoic acid derivatives with meta- and para-substituents to each other with just two parameters: a substituent constant and a reaction constant. This equation was developed and published by Louis Plack Hammett in 1937 as a follow-up to qualitative observations in a 1935 publication. The basic idea is that for any two reactions with two aromatic reactants only differing in the type of substituent, the change in free energy of activation is proportional to the change in Gibbs free energy.''Advanced Organic Chemistry Part A'' Second Edition F.A. Carey, R.J. Sundberg Plenum Press This notion does not follow from elemental thermochemistry or chemical kinetics and was introduced by Hammett intuitively. The basic equation is: :\log \frac = \sigma\rho relating the equilibrium constant, ''K'', for a given equilibrium re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pearson Product-moment Correlation Coefficient
In statistics, the Pearson correlation coefficient (PCC, pronounced ) ― also known as Pearson's ''r'', the Pearson product-moment correlation coefficient (PPMCC), the bivariate correlation, or colloquially simply as the correlation coefficient ― is a measure of linear correlation between two sets of data. It is the ratio between the covariance of two variables and the product of their standard deviations; thus, it is essentially a normalized measurement of the covariance, such that the result always has a value between −1 and 1. As with covariance itself, the measure can only reflect a linear correlation of variables, and ignores many other types of relationships or correlations. As a simple example, one would expect the age and height of a sample of teenagers from a high school to have a Pearson correlation coefficient significantly greater than 0, but less than 1 (as 1 would represent an unrealistically perfect correlation). Naming and history It was developed by Karl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spearman's Rank Correlation Coefficient
In statistics, Spearman's rank correlation coefficient or Spearman's ''ρ'', named after Charles Spearman and often denoted by the Greek letter \rho (rho) or as r_s, is a nonparametric measure of rank correlation ( statistical dependence between the rankings of two variables). It assesses how well the relationship between two variables can be described using a monotonic function. The Spearman correlation between two variables is equal to the Pearson correlation between the rank values of those two variables; while Pearson's correlation assesses linear relationships, Spearman's correlation assesses monotonic relationships (whether linear or not). If there are no repeated data values, a perfect Spearman correlation of +1 or −1 occurs when each of the variables is a perfect monotone function of the other. Intuitively, the Spearman correlation between two variables will be high when observations have a similar (or identical for a correlation of 1) rank (i.e. relative position lab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
