All articles starting with R
22,461 articles
Rupes Tenuis
Rupes Tenuis is an IAU-named (1988) scarp on Mars at the southern edge of the north polar cap, about 650 km across, marking the erosional front of the Early Amazonian Rupes Tenuis basal unit of Planum Boreum.
Rupi Kaur (ਰੂਪੀ ਕੌਰ)
Rupi Kaur (ਰੂਪੀ ਕੌਰ), born 1992, is a Canadian poet and illustrator whose self-published 2014 debut, milk and honey, made her the face of Instapoetry.
Rupicapra pyrenaica
Rupicapra pyrenaica, the southern or Pyrenean chamois (isard, rebeco meridional), is a Caprinae goat-antelope of the Pyrenees, Cantabrian Mountains, and Apennines, with three subspecies and IUCN Least Concern status.
Rupicola
Rupicola (cocks-of-the-rock) is a genus of two South American cotingid birds, R. rupicola and R. peruvianus, with orange crested males, lek courtship, rock-cave nesting, and CITES Appendix II listing.
Rupite (Рупите)
Rupite (Рупите) is a village and locality near Petrich, southwestern Bulgaria, at the extinct Kozhuh volcano, known for 74 °C mineral springs, Baba Vanga's grave at the 1994 St. Petka church, and nearby Heraclea Sintica.
Rupiya
The rupiya (روپیہ) is the silver coin introduced by Sher Shah Suri, Afghan sultan of Delhi, during his 1540 to 1545 reign, as part of a tri-metallic currency of silver, gold, and copper coins.
Rupkumari Choudhary
Rupkumari Choudhary, also spelled Roop Kumari Choudhary, is an Indian BJP politician elected to the Lok Sabha from Mahasamund, Chhattisgarh, in 2024, after serving as a Chhattisgarh MLA for Basna.
Ruplizumab
Ruplizumab (hu5c8, BG9588, ANTOVA), a humanized IgG1 anti-CD40L monoclonal antibody for lupus nephritis and ITP; effective but halted for thromboembolic events caused by FcγRIIa-mediated platelet activation.
Rupmati
Rupmati (रूपमती) was a queen of Mandu in Malwa, married to Baz Bahadur in 1555, who took her own life after the Mughal invasion of 1561.
Rupp Arena
Rupp Arena, at Central Bank Center in Lexington, Kentucky, opened 1976, home of Kentucky Wildcats men's basketball; 20,500 seats, named for coach Adolph Rupp, hosted 1985 Final Four.
Ruppia
Ruppia (widgeon grass, ditch-grass) is the sole genus of Ruppiaceae, submerged brackish-water monocots with hydrophilous pollination, cosmopolitan distribution, salinity tolerance from freshwater to hypersaline, and disputed species limits (4-12 species).
Ruppia maritima
Ruppia maritima, commonly called beaked tasselweed or wigeongrass, is a cosmopolitan submerged aquatic flowering plant of brackish and saline lagoons, ponds, salt marshes, and coastal pools.
Rupprecht, Crown Prince of Bavaria
Rupprecht Maria Luitpold Ferdinand, Crown Prince of Bavaria (1869–1955), heir of King Ludwig III, commanded the German Sixth Army from 1914 and Army Group Rupprecht from 1916 to 1919 on the Western Front; last head of the House of Wittelsbach.
Ruprecht 106
Ruprecht 106 is a globular cluster in the Milky Way's inner halo, in the constellation Centaurus, about 12 billion years old and rare for containing a single generation of stars.
Rupture of anterior cruciate ligament
Rupture of the anterior cruciate ligament (ACL tear): complete tear of the knee ligament connecting femur to tibia, common in pivoting sports; treated by reconstruction or rehabilitation, with debated comparative outcomes.
Rupture of artery
Rupture of an artery, or arterial rupture, is a full-thickness tear of a vessel wall causing hemorrhage. It complicates aneurysm, dissection, and trauma, chiefly in the aorta and intracranial arteries, and is treated by emergency open or endovascular repair.
Rupture of bladder, nontraumatic
Nontraumatic (spontaneous) rupture of the urinary bladder, SRUB: a rare, usually intraperitoneal tear of a weakened, distended bladder, most often linked to alcohol intoxication, diagnosed by CT cystography or laparotomy, treated surgically.
Rupture of posterior cruciate ligament
Rupture of the posterior cruciate ligament (PCL), the knee ligament preventing backward tibial movement; caused by dashboard or bent-knee trauma, usually treated non-operatively, surgery for combined injuries.
Rupture of pulmonary vessels
Rupture of pulmonary vessels (ICD-11 BB02.2) is tearing of a pulmonary artery or vein allowing blood to escape, usually iatrogenic from Swan-Ganz catheters (0.01-0.47% incidence, ~50% mortality) or ruptured pseudoaneurysm, presenting as hemoptysis and treated by embolization or surgery.
Ruq'ah script
Ruq'ah script (خط الرقعة) is a style of Arabic script created in the Ottoman Empire and codified in 1863, now the everyday handwriting of the eastern Arab world.
Ruqaiya Sultan Begum
Ruqaiya Sultan Begum (رقعیہ سلطان بیگم) was the first wife of Emperor Akbar and a granddaughter of Babur, born around 1542; she raised the future Shah Jahan and died in 1626.
Ruqayya bint Muhammad
Ruqayya bint Muhammad (رقية بنت رسول الله) was a daughter of the Islamic prophet Muhammad and his first wife Khadija, and the first of his two daughters married to Uthman.
Ruqi Mobility (如祺出行)
Ruqi Mobility (如祺出行), legally Chenqi Technology Limited, is a Guangzhou mobility platform backed by GAC Group and Tencent that runs ride-hailing and Robotaxi services in the Greater Bay Area and listed in Hong Kong in 2024.
Rural area
Rural area: territory outside defined urban areas, marked by low population density and small settlements. Defined residually by the U.S. Census Bureau, by 1 km² grid cells under the EU/OECD degree of urbanisation, and by nonmetro counties in USDA usage.
Rural development
Rural development covers economic and social efforts to encourage growth and improve quality of life outside cities, where nearly three-quarters of the world's extreme poor live.
Rural economics
Rural economics is the study of economic life in low-density places, examining how land, distance, and market access shape incomes, employment, and population, and how policy can change them.
Rural environment
Rural environment (农村环境; GEMET: environment pertaining to the countryside). Countryside natural and human systems outside dense urban areas; no universal rural definition, US Census threshold 2,000 housing units/5,000 residents, ~40% of world land degraded.
Rural flight
Rural flight, also called rural depopulation, is the sustained out-migration of young people from countryside to cities, leaving rural regions smaller and older; OECD data show 40% of remote rural regions shrinking and no single policy can halt it.
Rural Hospitals
Rural hospitals, also called Hospitals, Rural (MeSH), are hospitals located in rural areas; in the US, 1,797 of 5,121 community hospitals are rural, facing low volumes, payment shortfalls, closures, and mixed quality evidence.
Rural localities of the Americas
Rural localities of the Americas are settled places outside each country's urban definition, which varies by country, from US census rules to Mexico's 2,500-inhabitant threshold.