All articles starting with R
22,461 articles
R-Park
R-Park (R-park) is a Russian company building rope parks, ziplines, giant swings, and suspension bridges, with 200 objects launched across Russia and CIS and 52 government contracts; the name also covers recreation parks with rope courses, laser tag, and paintball.
R-peak detection
R-peak detection is the signal-processing task of locating the R peak in an electrocardiogram recording so heart rate, rhythm, and beat-to-beat timing can be measured, classically by the 1985 Pan-Tompkins algorithm.
R-process
The r-process, or rapid neutron-capture process, is a nucleosynthesis mechanism creating about half of all heavy elements beyond iron, confirmed in neutron-star mergers in 2017.
R-S-T system
The R-S-T system, or RST code, is the code amateur radio operators use to report received signal quality, devised by Arthur W. Braaten in 1934 and published in QST.
R-symmetry
R-symmetry is an internal symmetry of a supersymmetric theory that does not commute with supersymmetry, acting on supercharges and Grassmann parameters of superfields; in N=1 theories it is U(1)R.
R-tree
An R-tree is a balanced tree index for multi-dimensional spatial data, proposed by Antonin Guttman in 1984 and built into database systems including PostgreSQL and SQLite.
R-Truth
R-Truth is the ring name of Ronnie Aaron Killings (born 1972), an American wrestler and rapper known for his long WWE career and comedy persona.
R-Type
R-Type is Irem's 1987 horizontal arcade shoot-'em-up starring the R-9A Arrowhead against the Bydo Empire, known for the chargeable Wave Cannon and detachable Force pod; it spawned sequels from R-Type II to R-Type Final 2 and many home ports.
R-value (insulation)
R-value, also called thermal insulance, is a measure of thermal resistance used to rate insulation; the higher the value, the slower heat moves through the material.
R-Zero
R-Zero, or R-Zero Systems Inc., is an American startup founded in 2020 that makes UV-C disinfection devices and raised a $105 million Series C in 2023.
R. A. Huffaker, Jr.
R. Austin Huffaker, Jr. is an American jurist serving as a US district judge for the Middle District of Alabama since 2019, its chief judge since 2026.
R. A. Salvatore
R. A. Salvatore, born Robert Anthony Salvatore in 1959, is an American fantasy author whose Legend of Drizzt novels have sold more than 15 million copies in the United States.
R. A. Salvatore bibliography
R. A. Salvatore bibliography: published fiction of Robert Anthony Salvatore (born 1959), from The Crystal Shard (1988) through the 39-book Legend of Drizzt saga, the DemonWars Saga, and Star Wars tie-ins such as Vector Prime.
R. Abba b. Mar R. Ammi
R. Abba b. Mar R. Ammi (Rav Abba ben Rav Ammi ben Samuel) was the Gaon of Pumbedita from 869 until his death in 872.
R. Abimai, brother of Mar R. Mordecai
R. Abimai was gaon of the Academy of Sura in the early 9th century, holding office from 811 to 819 or 815 to 823, and brother of Mar R. Mordecai.
R. Adams Dudley
R. Adams Dudley is an American pulmonologist and health services researcher who studies the quality and value of medical care, directing the UCSF Center for Healthcare Value.
R. Aharon b. Mar R. Joseph ha-Kohen (Aharon b. Sargado)
R. Aharon b. Mar R. Joseph ha-Kohen, also known as Aharon b. Sargado, was gaon of the Babylonian academy of Pumbedita from 943 to 960.
R. Aḥhunai Kahana b. Mar Papa (var. Huna)
R. Aḥhunai Kahana b. Mar Papa was, according to medieval succession lists, head of the Academy of Sura, with his term dated 762–765 or from 761.
R. Alan B. Ezekowitz
R. Alan B. Ezekowitz is a South African-born immunologist known for innate immunity research who served as chief of pediatrics at Massachusetts General Hospital and later co-founded Abide Therapeutics.
R. Alan North
R. Alan North, born Richard Alan North, is a British physiologist and pharmacologist known for his work on P2X receptors, and Professor Emeritus at the University of Manchester.
R. Andrés Floto
R. Andrés Floto is a University Professor of Respiratory Biology at Cambridge, known for showing that the bacterium Mycobacterium abscessus spreads between cystic fibrosis patients.
R. Angus Silver
R. Angus Silver (Robin Angus Silver) is a British neuroscientist at University College London who studies synaptic transmission and was elected a Fellow of the Royal Society in 2017.
R. Ashoka
R. Ashoka is an Indian BJP politician and Leader of the Opposition in the Karnataka Legislative Assembly, a seven-time MLA who has held health, home, transport, and revenue portfolios.
R. B. Bennett
R. B. Bennett (Richard Bedford Bennett, 1st Viscount Bennett, 1870-1947) was Canada's eleventh prime minister, a Conservative leading from 1930 to 1935 during the Great Depression; he created the Bank of Canada, proposed the 1935 New Deal, and retired to England.
R. B. Choudary
R. B. Choudary (Ratanlal Bhagatram Choudary, 1949-2026), Indian film producer, founder of Super Good Films, key figure in Tamil and Telugu cinema known for Nattamai, Poove Unakkaga, and Thirupaachi; died in a 2026 car crash in Rajasthan.
R. B. Kitaj
R. B. Kitaj (born Ronald Brooks Kitaj, 1932–2007) was an American painter and printmaker who spent most of his career in London as a leading postwar figurative artist.
R. Balki
R. Balki (R. Balakrishnan), Indian filmmaker, screenwriter, and former Lowe Lintas chairman; directed Cheeni Kum, Paa, Pad Man, Chup; married to Gauri Shinde; Hope Productions co-founder.
R. Barclay Surrick
R. Barclay Surrick, born 1937, is a senior United States district judge for the Eastern District of Pennsylvania, appointed by President Clinton in 2000 after serving on the Delaware County court.
R. Bebai ha-Levi b. Mar R. Abba of Nehar Peḳod
R. Bebai ha-Levi b. Mar R. Abba of Nehar Peḳod was a Gaon of Sura, a head of the Babylonian academy known mainly from Sherira Gaon's succession list.
R. Benny Gerber
R. Benny Gerber is an Israeli-born theoretical and computational chemist at the Hebrew University of Jerusalem and UC Irvine, known for VSCF methods and predicted noble-gas molecules.