All articles starting with F
15,892 articles
Four Seasons Hotels and Resorts
Four Seasons Hotels and Resorts is a Toronto-based luxury hospitality company founded by Isadore Sharp that manages 135 hotels and resorts in 47 countries without owning them.
Four Seasons Pastoral Miscellany
The Four Seasons Pastoral Miscellany (四时田园杂兴, Sishi Tianyuan Zaxing) is a set of sixty quatrains on rural life by Southern Song poet Fan Chengda, written in 1186.
Four Seasons Total Landscaping press conference
The Four Seasons Total Landscaping press conference: Rudy Giuliani's November 7, 2020 Trump-campaign event in a Northeast Philadelphia parking lot, held after a venue mix-up as networks called the 2020 election for Biden.
Four Sisters and a Wedding
Four Sisters and a Wedding is a 2013 Filipino comedy-drama film directed by Cathy Garcia-Molina, in which four estranged sisters reunite to stop their brother's wedding.
Four spahbeds of the kusts
The four spahbeds of the kusts were the regional army commanders of Sasanian Iran, created in the early sixth century to replace the single Eranspahbed.
Four square
Four square, also called box ball, is a playground ball game for four players on a square court of four equal squares; players bounce an 8.5-inch rubber ball between squares, and errors send them to the back of a waiting line.
Four square step test
The four square step test (FSST) is a timed clinical test of dynamic standing balance in which the patient steps over four canes in a cross pattern.
Four stages of competence
Four stages of competence, also called the conscious competence model or ladder, is a 1970s skill-learning model from Noel Burch of Gordon Training International: unconscious incompetence, conscious incompetence, conscious competence, unconscious competence, with contested origins and optional fifth reflective stage.
Four Symbols (四象)
The Four Symbols (四象, also called the Four Guardians) are four animal groupings of seven Lunar Mansions each in Chinese astronomy, tied to directions and seasons.
Four temperaments
Four temperaments: ancient Greek proto-psychological theory of sanguine, choleric, melancholic, and phlegmatic personality types, derived from Hippocratic-Galenic humoral medicine and later echoed by Eysenck.
Four Tet
Four Tet, the alias of Kieran Hebden, is a British electronic musician with a 20-year career. He has performed at Madison Square Garden and closed Coachella in 2023.
Four Tops
Four Tops: Detroit Motown vocal quartet, originally the Four Aims, formed mid-1950s by Levi Stubbs, Duke Fakir, Obie Benson, and Lawrence Payton. Known for 1964–67 Holland-Dozier-Holland hits, two No. 1 singles, 1990 Rock and Roll Hall of Fame induction, and an unchanged lineup lasting over 40 years.
Four Volumes of Nectar
四部甘露 (Four Volumes of Nectar, 甘露四部, 都德泽西): four 18th-century medical treatises by the Mongolian physician Ishbaljir (1704–1788), a foundational classic of Mongolian medicine integrating the Tibetan Four Tantras with cold-heat pattern diagnosis.
Four Ways to Forgiveness
Four Ways to Forgiveness is Ursula K. Le Guin's 1995 HarperPrism collection of four linked Hainish novellas set on Werel and Yeowe, reissued in 2017 as Five Ways to Forgiveness.
Four Weddings and a Funeral
Four Weddings and a Funeral: 1994 British romantic comedy directed by Mike Newell, written by Richard Curtis, starring Hugh Grant and Andie MacDowell; low-budget Working Title film that won three BAFTAs and grossed about $200 million worldwide.
Four Weddings and a Funeral (miniseries)
Four Weddings and a Funeral (2019) is a Hulu 10-episode limited series by Mindy Kaling and Matt Warburton, inspired by the 1994 Richard Curtis film; Nathalie Emmanuel stars as Maya, with Richard Curtis executive producing and mixed critical reception.
Four-ball tester
A four-ball tester is a bench-scale tribometer in which a rotating steel ball is loaded against three stationary balls immersed in the lubricant, introduced in 1933 by Gerrit Daniel Boerlage.
Four-bar linkage
A four-bar linkage, also called a four-bar mechanism, is a planar mechanism of four rigid links joined in a closed loop by four pin joints, with one degree of freedom.
Four-Category System
The Four-Category System (四等人制) is historians' name for the Yuan dynasty's division of subjects into Mongols, Semu, Hanren, and Nanren, from the 1260s to 1368.
Four-circle diffractometry
Four-circle diffractometry is a single-crystal diffraction technique in which a crystal is rotated on a goniometer with four circles, three Eulerian angles and the detector angle, to measure each reflection's intensity.
Four-Class Social Order
The Four-Class Social Order (士農工商, shi-nō-kō-shō) is the enumeration of warriors, farmers, artisans, and merchants as the principal statuses of early modern Japanese society, though no Tokugawa law ranked them as tiers.
Four-component reaction
A four-component reaction (4CR) is a multicomponent reaction in which four different molecules combine in one step to give a product incorporating atoms from all four.
Four-current
The four-current, Jμ = (cρ, J), is the Lorentz-covariant four-vector combining charge density and current density in relativity, the source term of the covariant Maxwell equations, introduced by Minkowski in 1908.
Four-dimensional computed tomography
Four-dimensional computed tomography is a CT acquisition and reconstruction method that resolves a scanned volume over the respiratory cycle, used mainly for radiation therapy planning of breathing tumors.
Four-dimensional space
Four-dimensional space, or tetraspace, is a geometric space in which four independent coordinates are needed to specify the position of a point, generalizing ordinary three-dimensional space.
Four-engine aircraft
A four-engine aircraft, or quad, is an airplane powered by four engines. Early engines were too weak for heavy long-haul airframes, and regulators barred twins from over-water routes.
Four-force
The four-force, also called the Minkowski force, is the Lorentz-covariant generalization of force in relativity, defined as the derivative of a particle's four-momentum with respect to proper time.
Four-goat square zun
The Four-goat square zun (四羊方尊) is a late Shang dynasty bronze ritual wine vessel with four ram heads, unearthed in Ningxiang, Hunan, in 1938 and now held in Beijing.
Four-horned antelope
Four-horned antelope (Tetracerus quadricornis, chousingha), a small bovid of India and Nepal, the only bovid with four horns; IUCN Vulnerable, about 10,000 remain, protected under Schedule I of India's Wildlife Act.
Four-leaf clover
Four-leaf clover: a rare four-leaflet variant of normally trifoliate clover, mostly white clover (Trifolium repens); recessive trait plus environment, found about 1 in 5,000, a luck symbol.