All articles starting with E
17,681 articles
Elasticity (economics)
Elasticity in economics measures how strongly one economic quantity responds when another changes, expressed as a unit-free ratio of percentage changes, formalized by Alfred Marshall.
Elasticity (physics)
Elasticity in physics is the property of a solid by which deformation from applied forces reverses when the forces are removed, quantified through stress, strain, and elastic moduli.
Elasticity coefficient
Elasticity coefficient (MCA): local sensitivity of an enzyme reaction rate to a substrate, product, or effector, defined as the relative rate change per relative change in that factor; introduced by Kacser and Burns and Heinrich and Rapoport in 1970s metabolic control analysis.
Elasticity imaging
Elasticity imaging is a family of medical imaging techniques that noninvasively map the stiffness of biological tissue using ultrasound or MRI, used mainly to stage liver fibrosis and characterize tumors.
Elasticity tensor
The elasticity tensor is the fourth-rank tensor relating stress to strain in a solid, the tensorial statement of Hooke's law with 21 independent constants at most.
ElasticRun
ElasticRun is a Pune-based logistics and fulfillment company founded in 2016 by former Amazon executives, which became a unicorn in 2022 at a $1.5 billion valuation.
Elasticsearch
Elasticsearch is a distributed search and analytics engine built on Apache Lucene that stores JSON documents searchable in near real time, created by Shay Banon and released in 2010.
Elastin
Elastin, from the precursor tropoelastin (ELN gene, chromosome 7), is the cross-linked protein of elastic fibers giving recoil to arteries, lungs, and skin; ~1.1 MPa modulus, desmosine cross-links, no adult synthesis.
Elasto-inertial turbulence
Elasto-inertial turbulence (EIT) is a chaotic flow state in viscoelastic fluids, named in 2013, in which polymer elastic stresses and flow inertia sustain disordered motion. It is linked to maximum drag reduction.
Elastocaloric effect
The elastocaloric effect is the reversible temperature change produced in a material by applying or removing mechanical stress, the basis of solid-state cooling using shape-memory alloys.
Elastocaloric heat pump
An elastocaloric heat pump is a solid-state heating and cooling device that pumps heat by mechanically loading shape-memory alloys, needing no compressor or fluorinated refrigerant.
Elastocapillarity
Elastocapillarity is the coupling between capillary forces and elastic deformation of soft solids; the elastocapillary length, surface tension over elastic modulus, separates capillarity- from elasticity-dominated scales.
Elastoderma
Elastoderma (ORPHA:228240) is an extremely rare acquired skin disorder with localized skin laxity and delayed recoil on elbows, knees, or neck, caused by dermal accumulation of pleomorphic elastic fibers without calcification; cause unknown, no standard therapy.
Elastofibroma dorsi
Elastofibroma dorsi (elastofibroma) is a benign, slow-growing fibroelastic soft-tissue tumor of the infrascapular chest wall, first described by Järvi and Saxén in 1961, common in elderly women, bilateral in about a third of cases, and treated conservatively unless symptomatic.
Elastography
Elastography, also known as tactile imaging, is a non-invasive medical imaging technique that measures tissue stiffness using ultrasound or MRI, most commonly to detect liver fibrosis.
Elastohydrodynamic lubrication
Elastohydrodynamic lubrication (EHL) is a form of hydrodynamic lubrication where elastic deformation of the surfaces and a sharp rise in lubricant viscosity under pressure create the separating film.
Elastoma
Elastoma, also called nevus elasticus or juvenile elastoma (Weidman), is a rare connective tissue nevus of dermal elastic fibers causing firm skin-colored to yellowish papules; isolated or with osteopoikilosis as Buschke-Ollendorff syndrome.
Elastomer
An elastomer is a polymer that displays rubber-like elasticity, stretching to twice its length and returning to shape; examples include natural rubber, neoprene, and SBR.
Elastoplastic model
An elastoplastic model is a constitutive model of solid mechanics that describes deformation as a recoverable elastic part plus a permanent plastic part once a yield criterion is reached.
Elastosis perforans serpiginosa
Elastosis perforans serpiginosa (EPS) is a rare perforating skin disorder in which abnormal elastic fibers are pushed through the epidermis, forming reddish bumps in snake-like or ring patterns, often on the neck.
Elath
Elath, also spelled Eloth, was a biblical port settlement at the northern head of the Gulf of Aqaba, associated with modern Aqaba in Jordan and Eilat in Israel.
Elaver Vallis
Elaver Vallis, a Martian outflow channel near Ganges Chasma, carved by catastrophic drainage of Morella Crater's lake; IAU-named after France's Allier River; peak flood ~2×10^7 m3/s.
ELAVL/Hu proteins
ELAVL/Hu proteins (HuR/ELAVL1, HuB/ELAVL2, HuC/ELAVL3, HuD/ELAVL4) are ARE-binding RNA-recognition-motif proteins that stabilize mRNAs; HuR is ubiquitous and oncogenic when cytoplasmic, the others neuronal.
ELAVL1
ELAVL1 (HuR, Hu antigen R), Gene ID 1994 on human chromosome 19p13.2, is a ubiquitously expressed RNA-binding protein with three RRMs that binds AU-rich elements in mRNA 3' UTRs, stabilizing targets; essential for placental development and implicated in immunity and cancer.
Elayne Boosler
Elayne Boosler is an American stand-up comedian, writer, and activist who became the first woman to star in her own cable special, Party of One, in 1986.
Elazar Zelzer
Elazar Zelzer is an Israeli molecular and developmental biologist, a professor at the Weizmann Institute of Science known for linking skeletal development genetics with mechanosensory neurons.
Elazer R. Edelman
Elazer R. Edelman is an American biomedical engineer and cardiologist who is a professor at MIT and Harvard, and whose vascular drug delivery research underlies the bare-metal and drug-eluting stents used for coronary artery disease.
Elazığ (city)
Elazığ, a city of about 440,000 (2025) in Turkey's Eastern Anatolia Region at 1,067 m elevation, founded 1834 when the provincial center moved from ancient Harput; formerly Mamuretülaziz, renamed Elazığ in 1937.
Elâzığ (district)
Elâzığ Merkez district, the central district of Elâzığ Province, Turkey, also called Elaziz or Mamurat al-Aziz; founded 1834 from Harput's administrative center, population 463,686 (2025), 76.56% of the province.
Elba
Elba (Isola d'Elba), largest island of the Tuscan Archipelago, 223.5 km2, 10 km off Tuscany; historic iron mines (60 million tons), Napoleon's 1814-15 exile, tourism economy.