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In mathematics and statistics, the arithmetic mean, or simply the mean or average when the context is clear, is the sum of a collection of numbers divided by the count of numbers in the collection. The collection is often a set of results of an experiment or an observational study, or frequently a set of results from a survey. The term "arithmetic mean" is preferred in some contexts in mathematics and statistics because it helps distinguish it from other means, such as the geometric mean and the harmonic mean.
In physics, the Landau pole is the momentum scale at which the coupling constant of a quantum field theory becomes infinite. Such a possibility was pointed out by the physicist Lev Landau and his colleagues. The fact that couplings depend on the momentum scale is the central idea behind the renormalization group.
The Signetics 2650 was an 8-bit microprocessor introduced in mid-1975. According to Adam Osborne's book An Introduction to Microprocessors Vol 2: Some Real Products, it was "the most minicomputer-like" of the microprocessors available at the time.
Montonen–Olive duality or electric-magnetic duality is the oldest known example of strong-weak duality or S-duality according to current terminology. It generalizes the electro-magnetic symmetry of Maxwell's equations by stating that magnetic monopoles, which are usually viewed as emergent quasiparticles that are "composite", can in fact be viewed as "elementary" quantized particles with electrons playing the reverse role of "composite" topological solitons; the viewpoints are equivalent and the situation dependant on the duality. It was later proven to hold true when dealing with a N = 4 supersymmetric Yang–Mills theory. It is named after Finnish physicist Claus Montonen and British physicist David Olive after they proposed the idea in their academic paper Magnetic monopoles as gauge particles? where they state:
There should be two "dual equivalent" field formulations of the same theory in which electric (Noether) and magnetic (topological) quantum numbers exchange roles.
Purdy's Wharf is an office complex located in Halifax, Nova Scotia, Canada. Built over the water at the edge of Halifax Harbour and resting on pilings, it consists of two office towers, and a smaller office structure called Purdy's Landing. Purdy's Landing is commonly referred to as the "Xerox building", due to a large Xerox sign that used to hang on the exterior of the building. The complex also contains a seven-story multistorey car park as well as pedways connecting the complex to Casino Nova Scotia and the Downtown Halifax Link system.
Emil John Martinec is an American string theorist, a physics professor at the Enrico Fermi Institute at the University of Chicago, and director of the Kadanoff Center for Theoretical Physics. He was part of a group at Princeton University that developed heterotic string theory in 1985.
In theoretical physics, thermal quantum field theory or finite temperature field theory is a set of methods to calculate expectation values of physical observables of a quantum field theory at finite temperature.
The 1292 Advanced Programmable Video System is a home video game console released by European company Audiosonic in 1978. It is part of a group of software-compatible consoles which include the Interton VC-4000 and the Voltmace Database. The 1292 Advanced Programmable Video System included its power pack inside the console instead of an exterior power pack.
Kunágota is a village in Békés County, in the Southern Great Plain region of south-east Hungary.
Richard Keith Ellis is a British theoretical physicist, at the University of Durham and a leading authority on perturbative quantum chromodynamics and collider phenomenology.
Ōnoura Station is a railway station in Hatsukaichi, Hiroshima Prefecture, Japan, operated by West Japan Railway Company.
Lijiao Station is an interchange station on Line 3 of the Guangzhou Metro and Line 1 of the Guangfo Metro that started operations on 28 December 2006. It is located under Lijiao Village (沥滘村) in the Haizhu District of Guangzhou. The part of Line 1 of the Guangfo Metro was planned to open in 2010 but finally opened at 28 December 2018.
Paul Kingsley Townsend FRS is a British physicist, currently a Professor of Theoretical Physics in Cambridge University's Department of Applied Mathematics and Theoretical Physics. He is notable for his work on string theory.
Purdy Hill is an unincorporated community in Posey Township, Clay County, Indiana. It is part of the Terre Haute Metropolitan Statistical Area.
Khur Maksar District is a district of the Aden Governorate, Yemen. As of 2003, the district had a population of 47,044 inhabitants.
Beyköy is a village in the District of Emirdağ, Afyonkarahisar Province, Turkey.
WISE 1828+2650 is a brown dwarf or rogue planet of spectral class >Y2, located in constellation Lyra at approximately 47 light-years from Earth. It is the "archetypal member" of the Y spectral class.
Belas is one of the seven municipalities that make up the province of Luanda, as per the new administrative division of the province.
CBS-0550 is a drug developed by Taisho Pharmaceutical, which acts as a potent and selective cannabinoid CB2 receptor agonist, with 1400x selectivity for CB2 over the related CB1 receptor. Unlike most cannabinoid agonists, CBS-0550 has good solubility in water, and in animal studies it was found to produce analgesic and anti-hyperalgesic effects. A number of related compounds have been developed with similar properties.
Saikhunabad is a raion (district) of Sirdaryo Region in Uzbekistan. The capital lies at Saikhun.
