All articles starting with R
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Roswell incident
The Roswell incident: July 1947 recovery of debris near Roswell, New Mexico, first announced as a flying disc, retracted as a weather balloon, and attributed by the 1994 Air Force report to Project MOGUL balloons.
Roswell W. Phillips
Roswell W. Phillips was an American internal-medicine physician-scientist with the Department of Veterans Affairs, known for 1953 to 1956 papers showing cortisone reverses the hypercalcemia and kidney damage of sarcoidosis.
Roswell, Georgia
Roswell, Georgia: Fulton County city about 20 miles north of Atlanta on the Chattahoochee River; founded as an 1839 textile mill town by Roswell King, now about 91,500 residents.
Roswell, New Mexico
Roswell, New Mexico: county seat of Chaves County in the Pecos Valley, founded 1869 by Van C. Smith, population about 47,000, famed for the 1947 Roswell Incident, artesian-basin agriculture, and Roswell Air Center.
Roswell, New Mexico (TV series)
Roswell, New Mexico is a CW sci-fi drama reboot of Roswell (1999-2002), both from Melinda Metz's Roswell High books. Premiered January 15, 2019; Jeanine Mason as Liz Ortecho, Nathan Dean as Max Evans; four seasons, cancelled, streams on Netflix.
Roswietha Zobelt
Roswietha Zobelt, born Roswietha Reichel, is a German rower who won Olympic gold in the coxed quadruple sculls for East Germany at the 1976 and 1980 Olympics.
Roswitha Beier
Roswitha Beier (Roswitha Sonntag), East German swimmer born 1956 in Riesa, won silver in the 100 m butterfly and 4x100 medley relay at Munich 1972 and 200 m butterfly silver at the 1973 Belgrade World Championships.
Roswitha Blind
Roswitha Blind is a German mathematician specializing in convex and discrete geometry, known for the Blind–Mani-Levitska theorem, and an SPD member of the Stuttgart city council from 2004.
Roswitha Esser
Roswitha Esser (born 1941, Bad Godesberg) is a West German sprint canoeist who won Olympic K2 500 m gold in 1964 and 1968 with Annemarie Zimmermann, plus world titles in 1963 and 1970.
Rosy Bagolie
Rosaura "Rosy" Bagolie is an American Democratic politician serving in the New Jersey General Assembly from the 27th district, after careers as a school superintendent and Livingston councilwoman.
Rosy retrospection
Rosy retrospection, also called rosy retrospection bias, is the tendency to recall past events more fondly than they were actually evaluated while happening, first described by Mitchell and Thompson in 1994.
ROT13
ROT13 ("rotate by 13 places") is a letter substitution scheme that shifts each letter 13 places and, being self-inverse, encodes and decodes with the same operation.
Rota's basis conjecture
Rota's basis conjecture is an open problem in matroid theory, made in 1989, that n bases of a rank-n matroid can be repartitioned into n disjoint bases.
Rota's conjecture
Rota's conjecture, posed by Gian-Carlo Rota in 1970, asserts that each finite field has only finitely many excluded minors for representable matroids; it was proved in 2013.
Rotaka
The Rotaka, or "Mai malgache," was a wave of farmer and student protests in Madagascar from 1971 to 1972 whose central demand, Malgachization, brought down Tsiranana's First Republic and opened a military transition.
Rotala
Rotala (rotala, dwarf rotala, roundleaf toothcup) is a genus of about 71–75 aquatic herbs in Lythraceae, established by Linnaeus in 1771; R. rotundifolia is a Category II invasive weed in south Florida and a popular aquarium plant.
RotaPulp trial
RotaPulp (NCT04636450) is a randomized controlled trial comparing manual versus rotary instrumentation for pulpectomy in 100 primary mandibular molars of children aged 4-8, in four arms (K-file, Kedo-SH, K3, Kedo-S), sponsored by Universidad de Guanajuato in Mexico City, measuring instrumentation time, filling quality, pain, and complications.
Rotarix
Rotarix (RIX4414) is GSK's monovalent oral live attenuated human rotavirus vaccine for infants 6-24 weeks, given as two doses; WHO prequalified, licensed in over 100 countries, efficacy 93% in low-mortality countries.
Rotarod performance test
The rotarod performance test, also called the rotarod assay, is a behavioral test measuring motor coordination, balance, and endurance in rodents by timing how long they stay on a rotating rod.
Rotary (traffic)
A rotary is a circular intersection where traffic travels around a central island, the New England term for what elsewhere is called a traffic circle, typically larger and faster than a roundabout.
Rotary actuator
A rotary actuator is a device that converts hydraulic, pneumatic, or electrical energy into controlled rotary motion, usually limited to one revolution, serving valve automation and robotics.
Rotary ATPase inhibitors
Rotary ATPase inhibitors are molecules that block F- and V-type rotary ATPases, the membrane enzymes that synthesize or use ATP to pump protons; examples include oligomycin and bafilomycin A1.
Rotary ATPase mechanism, structure and evolution
Rotary ATPases are multi-subunit molecular machines that interconvert ATP hydrolysis energy and transmembrane ion gradients by rotating a central rotor, spanning F-, V-, and A-type families.
Rotary cannon
A rotary cannon, or Gatling cannon, is an autocannon whose multiple barrels rotate around a common axis, a principle Richard Gatling patented in 1862 that underlies the M61 Vulcan.
Rotary dial
The rotary dial is a telephone dialing device that sends each digit as electrical pulses; it was the standard way to place calls for most of the 20th century.
Rotary encoder
A rotary encoder, also called a shaft encoder, is a sensor coupled to a rotating shaft that converts its rotation into electrical signals from which angular position, direction of rotation, and speed are derived.
Rotary engine
The rotary engine, most commonly the Wankel engine, is an internal combustion engine that replaces pistons with an eccentric rotating rotor, first built by Felix Wankel in 1957.
Rotary evaporation
Rotary evaporation is a laboratory technique that removes solvents from samples by distilling them under reduced pressure while the flask rotates in a heated bath, concentrating solutions.
Rotary evaporator
The rotary evaporator, known as a rotovap or rotavap, is a laboratory instrument that removes volatile solvents under reduced pressure, invented by Lyman C. Craig in 1950.
Rotary friction welding
Rotary friction welding is a solid-state welding method, invented in 1956, that joins workpieces by rotating one against the other under pressure, producing strong welds without melting the materials.