All articles starting with E
17,681 articles
Errol Stewart
Errol Stewart: Jamaican sprinter born 1950, Kingston, 1968 Olympic 4x100m relay fourth and world record 38.3, 1970 Commonwealth gold; also South African cricketer born 1969, six ODIs for South Africa.
Erroll Brown Davis Jr.
Erroll Brown Davis Jr. was an American electrical engineer and executive who led Alliant Energy and served as the first African American chancellor of the University System of Georgia.
Erroll Garner
Erroll Garner, an American jazz pianist, was known for his orchestral, self-taught style and his composition "Misty." He was born in Pittsburgh in 1921 and died in 1977.
Erroll Shand
Erroll Shand (born 1973) is a New Zealand actor trained at the University of Southern Queensland, known for Terry Clark in Underbelly, Patrick Harrows in The Twelve, and Edgar Price in Evil Dead Burn.
Erromango
Erromango: large forested volcanic island, largest in Vanuatu's Tafea Province (also called third or fourth largest in the archipelago), area 888-902 km², population about 2,000, known for sandalwood, hardwood forests, and 1774 Cook landing.
Error
Error is the difference between a measured or computed value and the value that would be obtained under ideal conditions, as distinct from a mistake.
Error analysis for the Global Positioning System
Error analysis for the Global Positioning System identifies and mitigates the sources separating a GPS receiver's computed position from its true position, including atmospheric delays, satellite clock and ephemeris errors, and multipath.
Error budgets
An error budget is the permitted amount of failure for a service over a period, calculated as one minus its service level objective; the concept comes from Google's site reliability engineering.
Error correction code
An error correction code (ECC) is a method that adds redundancy to data so errors from storage or transmission are detected and corrected without retransmission.
Error correction model
An error correction model (ECM) is a time-series regression in which changes in a variable depend on short-run movements plus a term correcting deviations from long-run equilibrium.
Error detection and correction
Error detection and correction (ECC), also called error control, is the set of techniques by which digital systems add redundancy to detect corrupted data and often repair it.
Error exponent (hypothesis testing)
An error exponent in hypothesis testing is the constant E governing how fast a test's error probability decays exponentially, roughly as 2 to the power -nE, with sample size n.
Error field
An error field is a small, unintended non-axisymmetric perturbation of the tokamak magnetic field, typically one part in 10,000, that can drive locked modes and plasma disruptions.
Error function
The error function, also called the Gauss error function, is a special function defined by an integral of e^{-t^2}; it is closely related to the normal distribution.
Error mitigation in variational quantum algorithms
Error mitigation in variational quantum algorithms is the set of classical post-processing techniques, such as zero-noise extrapolation and probabilistic error cancellation, that reduce hardware-noise bias in hybrid quantum-classical computations.
Error statistics
Error statistics is a philosophy of statistical inference developed principally by philosopher Deborah G. Mayo, in which methods are judged by their probabilities of committing erroneous interpretations of data.
Error-driven learning
Error-driven learning adjusts a model's parameters in proportion to the difference between its predictions and observed outcomes, spanning supervised learning, reinforcement learning, and brain plasticity models.
Error-state Kalman filter
The error-state Kalman filter (ESKF), or indirect Kalman filter, is a state-estimation algorithm whose Kalman filter estimates errors between the true state and a nominal state.
Error-transparent gates
Error-transparent gates are quantum logic gates designed so any error occurring during the gate has the same effect as one occurring just before or after it, keeping it correctable.
Error–disturbance uncertainty relations
Error–disturbance uncertainty relations bound the error of measuring one quantum observable and the disturbance to another, replacing Heisenberg's 1927 product with Ozawa's universally valid 2003 relation, tested in 2012 experiments.
Errors and residuals
In statistics, an error is the difference between an observed value and the unknown true model value, while a residual is measured from a fitted model.
Errors-in-variables models
Errors-in-variables models are regression models that account for measurement error in predictor variables, correcting the biased, attenuated estimates ordinary least squares produces when covariates are observed with noise.
ErrTime
ErrTime: two hip-hop songs. Cardi B's 2025 Atlantic single from Am I the Drama? (Latto and Jeezy remixes, Rhythmic Airplay No. 1, gold) and Nelly's 2005 single from The Longest Yard soundtrack, Hot 100 No. 24.
ERS (satellite)
ERS (European Remote Sensing) was a pair of Earth observation satellites flown by the European Space Agency from 1991 to 2011, carrying synthetic aperture radar to study land, oceans, and ice.
ERS-1
ERS-1 (European Remote-Sensing Satellite 1) was the European Space Agency's first Earth observation satellite, a radar-carrying spacecraft launched from Kourou in 1991 that operated until 2000.
ERS-2
ERS-2 (European Remote Sensing satellite 2) was an ESA Earth-observation satellite launched in 1995, designed for three years but serving more than 16 before reentering in 2024.
Ersa
Ersa (Jupiter LXXI, S/2018 J1) is a tiny outer prograde moon of Jupiter discovered by Scott S. Sheppard, announced 2018, named 2019 for the Greek goddess of dew, daughter of Zeus and Selene, sister of Pandia, radius about 1.5 km.
Ersan İlyasova
Ersan İlyasova (Ersan Ilyasova), Turkish power forward born 1987 in Eskişehir; 13 NBA seasons, 9 with Milwaukee Bucks, stretch four, 10.1 PPG career, 2006 U20 MVP, last played Utah Jazz 2021.
Ersel A. Evans
Ersel A. Evans was an American metallurgical and materials engineer at the Hanford site in Washington State, known for reactor fuel work and a 1961 fuel assembly patent.
Ersin Tatar
Ersin Tatar, born 1960 in Nicosia, is a Turkish Cypriot politician, former UBP leader and Prime Minister, and the fifth President of the TRNC (2020–2025), known for advocating a two-state Cyprus settlement before losing the 2025 election to Tufan Erhürman.