All articles starting with M
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Mean time to recovery
Mean time to recovery (MTTR) is a reliability metric, also read as mean time to repair or resolve, measuring the average time to restore a system after failure.
Mean value theorem
The mean value theorem, also called Lagrange's mean value theorem, is a calculus theorem guaranteeing a point where instantaneous rate of change equals average rate of change.
Mean world syndrome
Mean world syndrome, George Gerbner's cultivation-theory concept (also scary world syndrome): heavy media-violence exposure breeds exaggerated crime fear and distrust. Pooled effect near .10; contested under controls; extended to social media.
Meander
A meander is a bend in a river that grows more pronounced as water erodes the outside of the curve and deposits sediment on the inside.
Meander neck
Meander neck: the narrow land strip between the two limbs of a river meander bend. When migration narrows it below one channel width, a neck cutoff breaches it, forming an oxbow lake; distinct from chute cutoffs.
Meanderi (crater on Ceres)
Meanderi is a 103-km-diameter impact crater on dwarf planet Ceres at 40.8°S, 194.2°E, IAU-approved October 15, 2015 and named for the Ngaing (New Guinea) goddess of taro, sugar cane, and other foods.
Meandu Coal Mine
Meandu Coal Mine is an open-cut thermal coal mine near Kingaroy in Queensland, Australia, supplying the adjacent Tarong and Tarong North power stations since 1984.
Meaning (semiotics)
Meaning in semiotics is the signification a sign produces. Saussure's dyadic signifier/signified and Peirce's triadic sign-object-interpretant define it relationally or interpretively; later social semiotics extends meaning to context and audiences.
Meaning of life
Meaning of life: the philosophical and psychological question of what makes a life significant. Covers meaning in versus of life, supernaturalism, naturalism, nihilism, Wolf's hybrid theory, and the coherence-purpose-mattering framework.
Meaning of Life (album)
Meaning of Life is Kelly Clarkson's eighth studio album, released October 27, 2017 on Atlantic Records, her first after leaving RCA; a soul/R&B record of 14 tracks that debuted at No. 2 on the Billboard 200.
Meanings of minor planet names: 8001–9000
Meanings of minor planet names: 8001–9000 is the portion of the IAU's minor-planet naming record covering numbered objects 8001 through 9000, named mostly in the late 1990s and 2000s.
Meanings of minor-planet names
Meanings of minor-planet names are recorded by the IAU's Working Group Small Body Nomenclature, which approves each asteroid name, at most 16 characters, with a citation explaining its origin.
Meanings of minor-planet names: 1–1000
The list of meanings of minor-planet names 1–1000 covers the first thousand numbered minor planets, from 1 Ceres, discovered in 1801, to 1000 Piazzia, named in 1923.
Meanings of minor-planet names: 1001–2000
Meanings of minor-planet names: 1001–2000 is the naming record for the second thousand numbered minor planets, objects discovered chiefly photographically in the 1920s and 1930s and named afterward.
Meanjin
Meanjin is one of Australia's longest-running literary magazines, founded in Brisbane in 1940 by Clem Christesen and named with a Yugara word for the land there.
Meänkieli
Meänkieli, also called Tornedal Finnish, is a Finnic minority language spoken in northern Sweden's Torne Valley and Malmfälten, recognized by Sweden in 2000, closely related to Finnish and Kven, with roughly 20,000 to 75,000 speakers.
Means of egress
A means of egress is the continuous, unobstructed path from any occupied part of a building to a public way, comprising the exit access, exit, and exit discharge.
Means of production
The means of production, also called productive property, are the assets used to make goods and services, from land and machines to software and data.
Means test
A means test is an eligibility-determination method that measures a household's income and assets against program-specific limits, governing welfare, bankruptcy relief, healthcare coverage, housing subsidies, and legal aid.
Meant to Be (Bebe Rexha song)
Meant to Be (Bebe Rexha song): 2017 Warner Records country-pop duet with Florida Georgia Line, written by Rexha, David Garcia, Josh Miller, and Tyler Hubbard; 50-week Hot Country Songs record-holder and Billboard's No. 1 country song of the 21st century's first 25 years.
Meantime
Meantime (1983) is Mike Leigh's Channel 4 television film about an unemployed East End family in Thatcher-era Britain, starring Phil Daniels, Tim Roth, and Gary Oldman in his first major role.
Meanwhile (Eric Clapton album)
Meanwhile is Eric Clapton's 22nd solo studio album, released in October 2024. The record features six new songs and collaborations with Jeff Beck and Van Morrison.
Meanwhile (Futurama)
"Meanwhile" is the 2013 Futurama episode (7ACV26) written by Ken Keeler as the Comedy Central series finale, in which Fry breaks the Professor's time button, freezing the universe so he and Leela live a lifetime together before the timeline resets.
Mearcair Planitia
Mearcair Planitia, a 1,175 km wide plain (planitia) on Mercury, IAU-approved 14 March 2017, named from the Irish word for the planet Mercury; proposed by planetary scientist Paul Byrne.
Mearim
Mearim (Rio Mearim): river in Maranhão, Brazil, rising on the Serra da Menina and flowing to São Marcos Bay; largest basin in the state, with a 646-km navigable waterway and tributaries Pindaré and Grajaú.
Measles
Measles (rubeola), a highly contagious morbillivirus infection with R0 12-18, airborne persistence up to 2 hours, immune amnesia, and 11 million estimated cases in 2024; prevented by two MMR doses (97% effective).
Measles and rubella vaccine, live, attenuated
Measles and rubella vaccine, live, attenuated (MR vaccine): freeze-dried bivalent live vaccine with Edmonston-Zagreb measles and Wistar RA 27/3 rubella strains, 1000 CCID50 each per 0.5 ml subcutaneous dose, WHO-prequalified since 2000.
Measles complicated by encephalitis
Measles complicated by encephalitis: brain inflammation from measles virus infection, about 1 per 1,000 cases, often causing permanent brain damage; includes ADEM, MIBE, and SSPE forms.
Measles vaccine
Measles vaccine, given as MMR or MMRV combination shots, is a live attenuated vaccine; two doses are 97% effective, with no evidence of autism risk and only small febrile seizure and ITP risks.
Measles vaccine, live, attenuated
Measles vaccine, live, attenuated (Edmonston-B, Edmonston-Enders strains; MMR/MMRV components): a live weakened measles virus vaccine licensed in 1963, 95% effective after one dose, 96% after two.