All articles starting with O
9,097 articles
Operational data store
Operational data store (ODS), or operational data layer (ODL): a subject-oriented, integrated, near-real-time database consolidating data from multiple transactional systems for operational reporting, distinct from data warehouses holding historical analytical data.
Operational definition
An operational definition specifies a concept by the exact procedure, instrument, or criterion used to measure it, a practice traced to physicist Percy Bridgman's 1927 operationalism.
Operational design domain
An operational design domain (ODD) is the set of operating conditions, such as road type, speed, and weather, under which a driving automation system is designed to function.
Operational interpretations of quantum entropies
Operational interpretations of quantum entropies identify which quantum entropy answers which physical task: conditional entropy prices state merging, min- and max-entropies govern guessing and decoupling.
Operational modal analysis
Operational modal analysis (OMA) is a response-only structural dynamics method that estimates natural frequencies, damping ratios, and mode shapes from ambient vibration, without measuring excitation forces.
Operational profile (software)
An operational profile is a quantitative characterization of how a software system will be used, listing its operations and their probabilities of occurrence; John D. Musa introduced the concept.
Operational risk management
Operational risk management is the discipline of identifying and mitigating risks from failed internal processes, people, systems, or external events, as defined in banking by the Basel Committee.
Operational Safety Case (UK CAA)
The Operational Safety Case (OSC) was the UK Civil Aviation Authority's document-based risk assessment for higher-risk drone operations, replaced by UK SORA in April 2025.
Operational semantics
Operational semantics is a formal method of defining programming languages by inference rules describing how programs execute on an abstract machine, introduced by Gordon Plotkin in 1981.
Operational Service Medal for Afghanistan
Operational Service Medal for Afghanistan (OSM Afghanistan), British campaign medal for UK forces serving on or in support of Afghanistan operations from 11 September 2001, with Zone 1 clasp and Op Pitting clasp.
Operational space formulation
The operational space formulation, introduced by Oussama Khatib at Stanford in 1987, is a robot control framework that unifies motion and force control of a manipulator's end-effector.
Operational technology
Operational technology (OT) is the hardware and software that detects or causes changes in the physical world, running factories, power grids, water systems, and transit networks, distinct from information technology.
Operational transconductance amplifier
The operational transconductance amplifier (OTA) is an integrated-circuit amplifier whose output is a current proportional to the voltage between its inputs, with electronically tunable gain via a bias current.
Operational transformation
Operational transformation (OT) is a consistency-control technique for collaborative editing, introduced by Ellis and Gibbs in 1989, that transforms concurrent operations so replicas converge; it underpins Google Docs, Microsoft Office, and Overleaf.
Operationalism
Operationalism, also called operationism, is the doctrine that a scientific concept's meaning is given by the operations used to measure it, formulated by Percy Bridgman in 1927.
Operationalization
Operationalization is the process of turning an abstract construct into a measurable variable via an operational definition. Rooted in Bridgman's 1927 operationalism, spread to psychology by Stevens and Boring, now standard in social science research methods.
Operations management
Operations management is the design, management, and improvement of systems that create goods or services, with decisions spanning processes, quality, capacity, inventory, and human resources.
Operations research
Operations research (OR), also called operational research, is an interdisciplinary field using mathematical models, optimization, and simulation to improve decisions, efficiency, and resource allocation in organizations.
Operations support system
An operations support system (OSS) is software a telecom enterprise uses to monitor, analyze, and manage its networks, covering provisioning, inventory, fault handling, and configuration.
Operative dentistry
Operative dentistry: dental specialty restoring defective teeth without full coverage restorations, focused on adhesion and minimal intervention; its flagship journal Operative Dentistry (ISSN 0361-7734) has published bimonthly since 1976.
Operative hysteroscopy
Operative hysteroscopy is a minimally invasive gynecological procedure in which a hysteroscope passed through the cervix diagnoses and surgically treats intrauterine disease, including polyps, fibroids, septa, and adhesions.
Operative Time
Operative time, also called surgical time, is the duration of a surgical procedure, usually from skin incision to closure. Distinct from anesthesia and OR times; predicts complications and drives scheduling and cost.
Operative vaginal delivery
Operative vaginal delivery is an obstetric procedure in which forceps or a vacuum extractor completes a vaginal birth when the second stage of labor needs expediting.
Operativo Independencia
Operativo Independencia was an Argentine military operation launched in Tucumán in February 1975 under Decree 261/75, ordering the armed forces to annihilate militants, and marking the start of clandestine repression.
Operator (computer programming)
In computer programming, an operator is a symbol or reserved word that performs a defined operation on one or more operands, such as the + in 3 + 4.
Operator (mathematics)
In mathematics, an operator, or mathematical operator, is a mapping that takes one function or vector to another, most commonly a linear map on a vector space.
Operator (physics)
In physics, an operator is a mathematical object acting on a system's state; in quantum mechanics, every measurable quantity, or observable, is represented by a linear operator.
Operator assistance
Operator assistance, also called operator services, is telephone service in which an operator, human or automated, helps place or bill a call, now mainly collect, person-to-person, and international calls.
Operator inference
Operator inference (OpInf) is a non-intrusive scientific machine learning method that fits low-dimensional polynomial dynamical systems to simulation snapshots, introduced by Peherstorfer and Willcox in 2016.
Operator K-theory
Operator K-theory is the branch of K-theory assigning K₀ and K₁ groups to C-algebras through projections and unitaries, central to classification and topological phases of matter.