edgepedia

Technology and the built world

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Eutectic high-entropy alloys via additive manufacturing

Eutectic high-entropy alloys via additive manufacturing are multi-component alloys that combine eutectic dual-phase solidification with high-entropy composition, built layer by layer using laser or arc heat sources.

Eutectic system

An eutectic system, or eutectic mixture, is a mixture of components that melts at a single temperature lower than any component alone, the basis of solders and cast irons.

Eutelsat

Eutelsat, also known as Eutelsat Communications, is a French satellite operator headquartered in Paris with 31 geostationary satellites and more than 650 OneWeb low-orbit satellites.

EUV photoresist

An EUV photoresist is the radiation-sensitive material that records circuit patterns in 13.5 nm extreme ultraviolet lithography, spanning chemically amplified, metal-oxide, and newer dry-deposited resist chemistries.

EV100 (initiative)

EV100 is a global initiative run by the non-profit Climate Group, launched in September 2017, whose member companies commit to electrifying their directly controlled fleets by 2030 and installing charging infrastructure.

EVA (vision foundation pretraining)

EVA, short for Explore the limits of Visual representation at scAle, is a BAAI vision pretraining family that reconstructs CLIP features instead of pixels, introduced at CVPR 2023.

EVA Air (长荣航空)

EVA Air (長榮航空), legally EVA Airways Corporation, is a Taiwanese international airline founded 1989 by Evergreen Marine, flying from Taipei Taoyuan since 1991; IATA BR, Star Alliance member since 2013, TWSE 2618.

Eva Hart

Eva Miriam Hart was an English survivor of the Titanic sinking at age 7 in 1912 who became a prominent speaker and critic of salvage of the wreck.

Eva Lerner-Lam

Eva Lerner-Lam is an American transportation systems engineer, founder and president of Palisades Consulting Group in New Jersey, elected to the National Academy of Engineering in 2023.

Evacuated tube collector

An evacuated tube collector is a solar thermal collector that heats water using glass tubes held under vacuum to retain heat, reaching up to 400 °C.

Evacuation model

An evacuation model is a computational or analytical model simulating how people leave buildings, vehicles, or areas during emergencies, estimating evacuation times and testing safety designs before construction.

Evacuation simulation

Evacuation simulation is a computational method modeling how crowds move and exit buildings or ships in emergencies, used by fire safety engineers to demonstrate code compliance.

Evacuation zone (nuclear)

An evacuation zone for a nuclear power plant, called an emergency planning zone (EPZ) in the United States, is a preplanned area around a reactor prepared before accidents.

Evaluation Assurance Level

An Evaluation Assurance Level (EAL) is a rating from EAL1 to EAL7 describing the depth and rigor of a security evaluation under the Common Criteria standard.

Evaluation awareness

Evaluation awareness is a language model's capacity to notice it is being tested and behave differently, first noted in Claude 3 Opus in 2024 and measured systematically in 2025.

Evaluation function

An evaluation function is a heuristic that scores how favorable a game position is, letting game-tree search rank moves without searching to the end, as in chess engines.

Evaluation strategy

Evaluation strategy is the rule a programming language uses to decide whether, when, and in what order a function call's arguments are evaluated, such as call-by-value or call-by-name.

Evan Pineda

Evan Pineda is an American aerospace research engineer at NASA's Glenn Research Center who received a Presidential Early Career Award for his multiscale failure analysis code.

Evan Reed

Evan John Reed (1976–2022) was an American computational materials scientist and Stanford associate professor known for machine learning for materials discovery and shock compression research.

Evan Sharp

Evan Sharp is an American internet entrepreneur and designer who co-founded Pinterest in 2010 with Ben Silbermann and Paul Sciarra, serving as its chief design and creative officer until 2021.

Evan Spiegel

Evan Thomas Spiegel, born 1990 in Los Angeles, is an American entrepreneur who co-founded Snap Inc., created Snapchat while at Stanford, and took the company public in 2017.

Evan Williams (bourbon)

Evan Williams is a Kentucky straight bourbon brand produced by Heaven Hill Distillery of Bardstown, Kentucky, introduced in 1957 and named for a Louisville distiller.

Evan Williams (Internet entrepreneur)

Evan Williams is an American internet entrepreneur from Clarks, Nebraska, who co-founded Blogger, Twitter, and Medium and was Twitter's chief executive from 2008 to 2010.

Evangelos Marinakis (Ευάγγελος Μαρινάκης)

Evangelos Marinakis (Ευάγγελος Μαρινάκης), also known as Vaggelis Marinakis, is a Greek shipowner who founded Capital Maritime in 2005 and owns Olympiacos and Nottingham Forest.

Evangelos Trifon Laskaris

Evangelos Trifon Laskaris is a Greek-born American mechanical engineer who designed GE's superconducting MRI magnets and was elected to the National Academy of Engineering in 2004.

Evaporative cooler

The evaporative cooler, or swamp cooler, is a device that cools air by evaporating water into it, an inexpensive alternative to air conditioning in dry climates.

Evaporative emission control

Evaporative emission control is the vehicle hardware and regulations that keep gasoline vapors from escaping the fuel system, storing them in a charcoal canister and burning them in the engine.

Eve Air Mobility

Eve Air Mobility is an Embraer-backed aerospace company in Melbourne, Florida, developing an electric vertical takeoff and landing air taxi, with certification targeted for 2028.

EVE Energy

EVE Energy Co., Ltd., also known as Eve Power, is a Chinese lithium battery manufacturer in Huizhou, Guangdong, founded in 2001 and listed on the Shenzhen ChiNext board in 2009.

Eve Systems

Eve Systems is a Munich-based smart home device maker founded in 1999 as Elgato, known for Thread and Matter accessories and owned by ABB since 2023.