All articles starting with F
15,892 articles
Foix-Chavany-Marie syndrome
Foix-Chavany-Marie syndrome (FCMS), or bilateral anterior opercular syndrome, is a rare pseudobulbar palsy with anarthria, facio-pharyngo-glosso-masticatory paralysis, and preserved automatic movements, usually from bilateral opercular strokes.
Foji
Foji is a two-row mancala-style sowing board game observed in Dahomey (Benin) in the early twentieth century, played on a 2x6 board with four counters per hole; documented by Béart 1955 and recorded in Ludii as DLP.Games.409.
FokI
FokI, from Flavobacterium okeanokoites, is the archetype type IIS restriction endonuclease: it binds 5′-GGATG-3′, cuts 9/13 bp downstream via a dimerizing C-terminal cleavage domain, and powers ZFNs, TALENs, and dCas9-FokI editors.
Fokker
Fokker was a Dutch aircraft manufacturer founded by Anthony Fokker in 1912, famous for World War I fighters, dominant in 1920s civil aviation, and bankrupt by 1996.
Fokker 100
The Fokker 100, certified as the F.28-0100, is a twin-engine regional jet built by Dutch manufacturer Fokker from 1986 to 1996, seating 100 to 122 passengers.
Fokker 50
The Fokker 50 is a twin-engine turboprop regional airliner built by the Dutch manufacturer Fokker as successor to the F.27 Friendship, seating up to 56 passengers on short-haul routes.
Fokker 70
The Fokker 70 is a short-range regional jet for about 80 passengers built by the Dutch manufacturer Fokker as a shortened version of the Fokker 100.
Fokker D.VII
The Fokker D.VII was a German single-seat biplane fighter of World War I, designed by Reinhold Platz and widely regarded as one of the war's best fighters.
Fokker Dr.I
The Fokker Dr.I, also called the Fokker Triplane, was a German single-seat triplane fighter of World War I, famous as the favored aircraft of the Red Baron.
Fokker F.VII
Built by Fokker, the F.VII was a Dutch eight-passenger airliner first flown in 1924. It was used on trans-continental flights and served as the foundation for the F.VIIA-3m and F.VIIB-3m series.
Fokker F27 Friendship
The Fokker F27 Friendship, also known as the F-27, is a Dutch twin-engine turboprop airliner first flown in 1955 to replace the Douglas DC-3 on short-haul routes.
Fokker F28 Fellowship
The Fokker F28 Fellowship is a Dutch twin-engined short- to medium-range jet airliner built by Fokker to complement its F27, first flying in 1967 and remaining in production until 1987.
Fokker–Planck equation
The Fokker–Planck equation, or Kolmogorov forward equation, is a partial differential equation describing how the probability distribution of a stochastic process with drift and diffusion evolves over time.
Fokker–Planck model (machine learning)
A Fokker–Planck model in machine learning uses the Fokker–Planck equation to describe how a probability density evolves over time, underpinning generative modeling, sampling, and density estimation.
Fokko M. Mulder
Fokko M. Mulder is a professor at Delft University of Technology working on energy storage materials, best known for inventing the battolyser, an integrated battery-electrolyser.
Fola (singer)
Fola (Folarin Odunlami, born 2000) is a Nigerian Afrobeats and Afro-R&B singer signed to Bella Shmurda's Dangbana Republik, known for "Alone," the record-setting debut album Catharsis, and the 2026 album 9.
Folaga (AUV)
Folaga, named after the Italian word for the coot, is a low-cost modular autonomous underwater vehicle developed in Italy by a research consortium and commercialized by Graal Tech.
Folake Olowofoyeku
Folákẹ́ Olówófoyekù, also known as Folake, is a Nigerian actress and Afro-rock musician born 1983 in Lagos. She starred as Abishola on CBS's Bob Hearts Abishola (2019–2024), the first Nigerian to play a Nigerian on U.S. prime-time TV, and voiced Amara in Mufasa: The Lion King.
Folarin Balogun
Folarin Balogun, American striker for AS Monaco and the USMNT, born 2001 in Brooklyn, raised in London, ex-Arsenal; committed to the US in 2023, scored 21 Ligue 1 goals on loan at Reims, and led the US with three goals at the 2026 World Cup.
Folate
Folate (vitamin B9) is a water-soluble B vitamin, also called folacin, needed for DNA synthesis and one-carbon metabolism. Folic acid is its synthetic form; 400 mcg daily periconceptionally prevents neural tube defects.
Folate deficiency
Folate deficiency (folic acid, vitamin B9 deficiency): low blood folate causing megaloblastic anemia; causes include poor diet, alcohol, malabsorption, and drugs; preventable with 400 µg daily and grain fortification.
Folate receptor
Folate receptor: cell surface glycoprotein (FRα, FRβ, FRγ, FRδ) binding folic acid with nanomolar affinity, GPI-anchored, overexpressed 100–300-fold in epithelial cancers; target for folate-conjugated drug delivery and pafolacianine tumor imaging.
Folate-derived coenzyme biosynthesis
Folate-derived coenzyme biosynthesis is the pathway that reduces folate to tetrahydrofolate via DHFR and loads it with one-carbon units, mainly from serine, producing the storage form 5-methyl-THF.
Fold (geology)
A fold, also called a geological fold, is a bend in rock layers, usually sedimentary bedding, produced by ductile deformation without fracturing, from microscopic wrinkles to mountain-belt scales.
Fold (higher-order function)
Fold, also called reduce, is a higher-order function that combines the elements of a data structure into a single result, as in the left and right variants foldl and foldr.
Fold change
Fold change is the ratio of two measured values of the same quantity, usually reported as log2 fold change, and is used most often in gene expression analysis, pharmacology, and assay development.
Fold recognition
Fold recognition, also known as protein fold recognition, is a protein structure prediction method that assigns a sequence to the known fold it most likely adopts by threading it through template structures.
Fold-and-thrust belt
A fold-and-thrust belt is a region of layered rocks deformed by folding and low-angle thrust faulting under horizontal compression, forming on the foreland side of a mountain belt.
Folded (song)
Folded is a 2025 R&B single by Kehlani, released June 11, 2025 via Atlantic Records, produced by Andre Harris and others. It peaked at No. 6 on the Billboard Hot 100 and won two 2026 Grammys.
Folded cascode
A folded cascode is an amplifier topology in which the cascode transistor is of the opposite type, folding the signal current into a separate branch.