All articles starting with D
24,034 articles
Defluorinative functionalization
Defluorinative functionalization is a set of organic chemistry methods in which a carbon–fluorine bond is selectively cleaved and replaced by a new C–C or C–X bond.
Defluorinative functionalization of polyfluoroarenes
Defluorinative functionalization of polyfluoroarenes is a set of synthetic methods that selectively cleaves carbon–fluorine bonds in polyfluoroarenes and replaces them with alkyl, aryl, amino, or boryl groups.
Defne Cakmak
Defne Cakmak (Defne Çakmak), Turkish compound archer with Demka Okçuluk Spor Kulübü; 2026 European indoor U21 champion, two World Cup team golds (Shanghai, Antalya 2026), career-best 700 at 50m, world ranking 19-20.
DeForest Buckner
DeForest Buckner, Honolulu-born NFL defensive tackle (6-7, 295 lbs), Oregon star, 49ers first-rounder (7th overall, 2016), traded to Colts in 2020; two-time All-Pro, three Pro Bowls, 75.5 career sacks.
DeForest Kelley
DeForest Kelley (1920-1999), American actor, played Dr. Leonard "Bones" McCoy on Star Trek (NBC 1966-69), its animated series, and six films; earlier a western villain character actor, later Walk of Fame honoree.
Deforestation
Deforestation is the permanent conversion of forest to other land uses, mainly agriculture, which drives almost 90 percent of it; annual loss fell from 11 to 7.8 million hectares between 2000-2010 and 2010-2018.
Deforestation of the Amazon rainforest
Deforestation of the Amazon rainforest: permanent forest conversion, mainly to cattle pasture and soy, with about 17% of cover lost and 38% of remaining forest degraded; Brazilian annual clearing fell from a 27,772 km² peak in 2004 to 5,731 km² in 2025.
Deformable convolution
Deformable convolution is a neural network operator whose kernel sampling locations shift by learned offsets, letting the grid adapt to object shapes. Introduced at ICCV 2017.
Deformable image registration
Deformable image registration is a medical image processing method that aligns two images of anatomy by locally warping one until its structures match, used most extensively in radiotherapy treatment planning.
Deformable mirror
A deformable mirror is an adaptive optic whose reflective surface is reshaped by an array of actuators to correct wavefront errors, used in astronomy, high-power lasers, and retinal imaging.
Deformable model (computer vision)
A deformable model in computer vision is a curve or surface pulled by image forces onto object boundaries, best known as the snake, or active contour.
Deformable object manipulation
Deformable object manipulation (DOM) is the branch of robotics in which robots grasp, move, and reshape objects like cables, clothes, food, and surgical tissue, applied in manufacturing, logistics, and surgery.
Deformation (engineering)
Deformation in engineering is the change in a solid body's size or shape produced by forces or other loads; it is elastic if it disappears when the load is removed, and plastic if it remains.
Deformation (physics)
Deformation in physics is a change in the shape or size of an object caused by applied force. Elastic deformation recovers; plastic deformation does not.
Deformation gradient
The deformation gradient F is a second-order tensor describing how a material deforms locally, defined as the gradient of the motion from reference to current configuration.
Deformation mapping
Deformation mapping is the time-dependent function in continuum mechanics that carries each material point of a body from its reference configuration to its deformed configuration under load.
Deformation monitoring
Deformation monitoring is the repeated measurement of changes in the position, shape, or movement of structures, terrain, or landslides over time, using geodetic surveys, geotechnical instruments, and remote sensing.
Deformation quantization
Deformation quantization is a mathematical technique for constructing quantum theories by deforming the algebra of functions on a classical phase space into a noncommutative star product.
Deformed doubly magic 100Zr
Zirconium-100, also written 100Zr, is a neutron-rich, even-even zirconium isotope discovered in 1970, sitting at the center of an abrupt nuclear shape transition in which its ground state becomes strongly deformed.
Deformed wing virus
Deformed wing virus (DWV), an Iflaviridae RNA virus of honey bees, is vectored by Varroa destructor mites; variants DWV-A and DWV-B (VDV-1) cause deformed wings and colony losses, with DWV-B now displacing DWV-A globally.
Defqon.1 Festival
Defqon.1 is Q-dance's annual hardstyle and hardcore festival, first held in 2003 at Almere Strand and now staged at Biddinghuizen, Netherlands. Largest hardstyle festival worldwide; Australian and Chilean editions; 2026 edition cancelled by code red heat.
Defragmentation
Defragmentation, also called defragging or disk defragmentation, moves portions of files so each file's clusters are stored contiguously, improving access speed on hard drives; Windows runs it as a scheduled weekly task.
Defrocking
Defrocking, formally dismissal from the clerical state in Catholic canon law, strips a clergyman of the right to exercise his orders and attached privileges, though ordination itself remains.
Deft (김혁규) (gamer)
Deft (김혁규, Kim Hyuk-kyu, born 1996) is a South Korean League of Legends AD carry; Worlds 2022 champion with DRX, MSI 2015 winner with EDG, first to win Worlds, MSI, LCK and LPL, now returning from military service.
Defter
Defter was a Turkish journal of literature, history, politics, and philosophy published in Istanbul by Metis Yayınları from 1987 to 2002, producing 45 issues over fifteen years under a founding board including Semih Sökmen.
Deftones
Deftones is an American alternative metal band formed in Sacramento, California in 1988, fronted by Chino Moreno and known for blending heavy riffs with ambient, shoegaze textures.
Deftones (album)
Deftones (2003) is the self-titled fourth studio album by the Sacramento metal band Deftones, produced by Terry Date, released after White Pony, fined $1 million for lateness, and later reappraised as a lost classic.
Deftones discography
Deftones (デフトーンズ) discography: Sacramento alternative metal band formed 1988; ten studio albums from Adrenaline (1995) to private music (2025) on Maverick then Reprise; 10M+ records sold; White Pony 2x-Platinum RIAA.
Defunct Catholic schools in the Philippines
Defunct Catholic schools in the Philippines are Catholic institutions that have ceased operating, most often from pandemic-era revenue losses, low enrollment, and competition with government schools.
Defunct denominational schools in Africa
Defunct denominational schools in Africa are mission schools closed by apartheid policy, state takeover, or mission withdrawal, including Adams College, Tiger Kloof, and Inanda Seminary.