All articles starting with E
17,681 articles
Energy-dispersive X-ray fluorescence
Energy-dispersive X-ray fluorescence (EDXRF) is an elemental analysis technique that excites a sample with X rays and identifies its elements from their emitted X-ray energies.
Energy-dispersive X-ray spectroscopy
Energy-dispersive X-ray spectroscopy, also called EDX or EDS, identifies the elemental composition of a sample by measuring characteristic X-rays emitted under a focused electron beam.
Energy-efficient train driving
Energy-efficient train driving, also called eco-driving or EETC, is the practice of driving a train along a speed trajectory that minimizes traction energy while still meeting the timetable's running time.
Energy-filtered transmission electron microscopy
Energy-filtered transmission electron microscopy, also called electron spectroscopic imaging, is a TEM technique that images electrons of a chosen energy loss to map specific elements at better than 1 nm resolution.
Energy-loss near-edge structure
Energy-loss near-edge structure (ELNES) is the fine structure on EELS ionization edges within about 50 eV of the edge onset, reporting an atom's bonding environment and oxidation state.
Energy-related Products Directive
The Energy-related Products Directive, Directive 2009/125/EC of 2009, is a European Union framework law letting the Commission set ecodesign requirements for energy-using products, repealed in 2024.
Energy-transfer [2+2] cycloaddition
Energy-transfer [2+2] cycloaddition is a photochemical reaction in which a visible-light photocatalyst transfers triplet energy to an alkene, allowing the otherwise UV-only, thermally forbidden formation of cyclobutanes.
Energy–momentum relation
The energy–momentum relation, also called the relativistic energy–momentum equation, is the special relativity formula E² = (pc)² + (mc²)² connecting a particle's energy, momentum, and rest mass.
Energy–time uncertainty relation
The energy–time uncertainty relation is a set of inequalities in quantum mechanics connecting energy spread to lifetimes and evolution times, with no time operator involved.
ENERGY2MOB trial
ENERGY2MOB (NCT06988904) is a randomised controlled trial in Berguedà, Catalonia, testing an 8-week group nutrition, physical activity, and emotional well-being programme for 5-10% weight loss in adults with BMI 27-40.
EnergyAustralia
EnergyAustralia is an Australian energy retailer and generator headquartered in Melbourne and wholly owned by Hong Kong-based CLP Group, serving more than 2.44 million electricity and gas customer accounts across five states and territories.
Energylandia
Energylandia is Poland's largest amusement park, opened 14 July 2014 in Zator by Marek Goczał, with 133 attractions on 90 hectares, about 20 roller coasters including Hyperion and Zadra, and 2.5 million visitors in 2023.
EnergySolutions Clive facility
The EnergySolutions Clive facility is a commercial disposal site for low-level radioactive waste near Clive, Utah, and one of four active commercial facilities in the United States.
Enerkem
Enerkem is a Montreal-based Canadian waste-to-biofuels company founded in 2000 by Esteban and Vincent Chornet, whose gasification process turns non-recyclable municipal waste into methanol and ethanol.
EnerSys
EnerSys is an American manufacturer of industrial batteries, chargers, and power equipment, headquartered in Reading, Pennsylvania, serving over 10,000 customers in more than 100 countries.
EnerVenue
EnerVenue Holdings, Ltd. is a Fremont, California energy storage company founded in 2020 by Stanford professor Yi Cui that makes NASA-derived nickel-hydrogen batteries for long-duration grid electricity storage.
Enes Kanter Freedom
Enes Kanter Freedom, born Enes Kanter (1992), Turkish-American NBA center (2011-2022, Jazz, Thunder, Knicks, Celtics, Blazers), human rights activist, who in 2026 declared for the WNBA draft and was banned from Chicago Sky home games.
Enes Ünal
Enes Ünal (born 1997, Bursa) is a Turkish striker, youngest Süper Lig goalscorer, ex-Manchester City, Villarreal, Getafe (36 goals) and Bournemouth, returned to Getafe 2026 after two ACL tears.
Enetarzi
Enentarzi, also written En-entar-zi, was ruler (ensi) of the Sumerian city-state of Lagash in the Early Dynastic IIIb period, after serving as high administrator of the temple of Ningirsu at Girsu; his son Lugalanda succeeded him.
EnEV
The Energieeinsparverordnung (EnEV) was Germany's statutory ordinance regulating building energy performance, in force from February 2002 until it was absorbed into the Buildings Energy Act (GEG) in 2020.
Eneva
Eneva is a Brazilian integrated energy company founded in 2001 as MPX by Eike Batista, now Brazil's largest private natural gas operator and largest thermal power generator.
Enewetak Atoll
Enewetak Atoll (Eniwetok), a Marshall Islands coral atoll, hosted 43 US nuclear tests (1948–1958, 31.7 MT) including Ivy Mike; cleanup created Runit Dome on Runit Island, and resettlement began in 1980.
Enexis
Enexis is a Dutch regional grid operator that builds and maintains electricity and gas networks serving three million customers in Groningen, Drenthe, Overijssel, Noord-Brabant, and Limburg.
Enfabrica
Enfabrica was a Silicon Valley networking-chip startup whose ACF SuperNIC fed data to AI accelerators; NVIDIA paid over $900 million for its CEO and technology in 2025.
Enfenamic acid
Enfenamic acid (Tromaril) is an Indian-discovered fenamate NSAID analgesic, N-phenethylanthranilic acid, C15H15NO2, found in 1964 at CSIR-IICT Hyderabad, marketed by Unichem from 1981, then withdrawn.
Enfeoffment of Ke at Yan
The enfeoffment of Ke at Yan (燕侯克之封) made Ke, eldest son of Shao Gong, the first Marquis of Yan under King Cheng of Zhou, in the region around present-day Beijing.
Enfeoffment of Shu Yu of Tang (the paulownia-leaf episode)
The Enfeoffment of Shu Yu of Tang (桐叶封弟) is a Western Zhou story in which young King Cheng's jest, a paulownia leaf, made his brother ruler of Tang.
Enfield Monster
Enfield Monster, or Enfield Horror: alleged three-legged, pink-eyed creature reported by Henry McDaniel in Enfield, Illinois, April–May 1973; a media flap with no physical evidence, later studied by sociologists as rumor amplification, not mass hysteria.
Enfield poltergeist
Enfield poltergeist: reported 1977-79 disturbances at 284 Green Street, London, investigated by SPR's Maurice Grosse and Guy Lyon Playfair; famous male 'Bill' voice from Janet Hodgson, admitted trickery, disputed evidence.
Enfield, England
Enfield, England: historic market town in North London and centre of the London Borough of Enfield; market chartered 1303, about 330,000 residents, large industrial land base, Enfield Delivers growth plan to 2040.