All articles starting with E
17,681 articles
Exa (search engine)
Exa is a San Francisco search engine that serves web results to AI agents through an API, matching queries by meaning using embeddings rather than keywords.
ExA-Arcadia
exA-Arcadia (exA) is a JVS multi-game arcade system board by EXA-ARCADIA PTE. LTD., founded by CEO Eric Chung. Debuted November 2019 in Japan; Windows-based, 4 cartridge slots, 0.3-frame input response, 4K output, over 50 titles, Neo-Geo-style buyout model.
Exabyte Corporation
Exabyte Corporation was an American data-storage company in Boulder, Colorado, founded in 1985, that introduced the first 8mm tape drive for computer backup in 1987.
Exacharte of Africa (Division of the Byzantine Empire)
Exacharte of Africa (Exarchate of Africa) was the Byzantine Empire's western Mediterranean division, centered at Carthage, existing about 585–698. Exarchs held combined civil and military power; the province fell to Arab conquest, with Carthage taken in 698 and Ceuta in 709.
Exact cellular decomposition coverage
Exact cellular decomposition coverage is a coverage path planning method dividing a robot's free space into non-overlapping cells whose union exactly fills it, so covering every cell covers the whole environment.
Exact diagonalization
Exact diagonalization is a numerical method that builds and diagonalizes the Hamiltonian matrix of a quantum many-body system in a finite basis, limited to clusters of roughly twenty sites.
Exact differential equation
An exact differential equation is a first-order equation M dx + N dy = 0 with a potential function F whose solutions are level curves F = C.
Exact inference
Exact inference is a class of algorithms that computes posterior probabilities in probabilistic graphical models exactly, using methods like variable elimination and the junction tree algorithm.
Exact plane wave spacetime
An exact plane wave spacetime is a non-flat vacuum solution of Einstein's equations with the symmetry of a plane electromagnetic wave, defined by Bondi, Pirani, and Robinson in 1959.
Exact Sciences
Exact Sciences is a Madison, Wisconsin molecular diagnostics company best known for Cologuard, the first FDA-approved stool DNA test for colorectal cancer screening, and for the Oncotype DX oncology tests.
Exact sequence
An exact sequence is a sequence of algebraic objects, typically modules, connected by homomorphisms in which each map's image equals the next map's kernel, the central notion of homological algebra.
Exact solutions in general relativity
Exact solutions in general relativity, also called exact solutions of Einstein's field equations, are spacetime metrics solving Einstein's equations in closed form, including black holes and cosmologies.
Exact test
An exact test is a statistical hypothesis test whose Type I error rate stays at or below the significance level in finite samples, including Fisher's exact test.
Exactly-once semantics
Exactly-once semantics: strongest stream processing guarantee that no record is lost or duplicated under failure, achieved via checkpointing, deduplication IDs, and transactions in Dataflow, Flink, Kafka, and Spark.
ExacTrac Dynamic
ExacTrac Dynamic is a patient positioning and monitoring system for radiotherapy, made by Brainlab of Munich, Germany, combining optical surface tracking, thermal imaging, and stereoscopic X-ray verification.
Exadata
Oracle Exadata is an engineered database system combining Oracle Database servers with intelligent storage servers, first shipped in 2008 and sold as racks or cloud services.
Exagamglogene autotemcel
Exagamglogene autotemcel (Casgevy, exa-cel) is Vertex Pharmaceuticals' CRISPR/Cas9-edited autologous stem cell gene therapy for sickle cell disease and beta-thalassemia, first authorized by the UK MHRA in November 2023.
Exail Technologies
Exail Technologies is a French high-tech holding company specializing in maritime robotics and navigation systems, formerly Groupe Gorgé, serving defense and civil customers in 80 countries.
Exaltare Capital Partners
Exaltare Capital Partners is a Boston, Massachusetts private equity firm, founded by Omar Simmons in 2012, that invests in lower-middle-market franchise and multi-unit consumer businesses.
Exaltation (astrology)
Exaltation is a traditional astrological concept in which each of the seven classical planets has one zodiac sign of heightened expression, with the opposite sign its fall.
Exam
Exam (எக்ஸாம்) is a 2026 Tamil crime thriller web series on Prime Video, directed by A. Sarkunam with Pushkar-Gayathri as creative producers. Seven episodes follow Jhansi (Dushara Vijayan), who impersonates a kidnapped DSP to expose an exam paper-leak scam.
Exam (2009 film)
Exam (2009) is a British psychological thriller directed by Stuart Hazeldine, also known as El examen or エグザム: eight job candidates in a locked room have 80 minutes to answer a question printed nowhere on their blank papers.
Exametazime
Exametazime (HMPAO, hexamethylpropylene amine oxime) is a ketoxime chelator for technetium-99m, marketed as the Ceretec kit (US approval 1988), used for Tc-99m brain perfusion SPECT in stroke and for labeling autologous leukocytes to image infection.
Examination quotas (xue'e)
Examination quotas (xue'e) (学额) were the fixed numbers of students the Qing dynasty allotted to each government school, shaping who could enter the civil and military examinations until 1906.
Examination Tables
Examination tables, also called exam or clinical couches, are medical furniture for patient physical examinations. Key facts: FDA Class I device (21 CFR 878.4960), fixed-height models about 32 inches, MDE Standards requiring 17-inch low transfer height, and 2024 ADA Title II acquisition rules.
Examination under anesthesia
Examination under anesthesia (EUA) is a clinical examination performed while a patient is sedated, used when pain or muscle guarding prevents an adequate awake assessment.
Examination Yuan
The Examination Yuan (考试院) is an organ of the Republic of China created in 1928 to run national examinations and civil-service personnel administration, led for nearly two decades by Dai Jitao.
EXAMINE trial
EXAMINE (Examination of Cardiovascular Outcomes with Alogliptin versus Standard of Care), NCT00968708, was Takeda's 5,380-patient noninferiority trial showing the DPP-4 inhibitor alogliptin did not increase cardiovascular events in type 2 diabetes after acute coronary syndrome.
Examining magistrate
The examining magistrate, or investigative judge, is a judge in civil-law systems who leads complex criminal investigations, such as those involving international terrorism and public health affairs.
Examining magistrate in defunct and reformed legal systems
The examining magistrate was a judge who directed the pretrial investigation of a criminal case in an inquisitorial procedure, and the office has been abolished in Germany and Italy.