• In physics, an observable is a physical property or physical quantity that can be measured. In classical mechanics, an observable is a real-valued "function"...
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  • Thumbnail for Observable universe
    The observable universe is a spherical region of the universe consisting of all matter that can be observed from Earth; the electromagnetic radiation from...
    66 KB (6,650 words) - 05:38, 8 June 2025
  • Observability is a measure of how well internal states of a system can be inferred from knowledge of its external outputs. In control theory, the observability...
    13 KB (2,205 words) - 21:58, 19 May 2024
  • In mathematics, in the representation theory of algebraic groups, an observable subgroup is an algebraic subgroup of a linear algebraic group whose every...
    931 bytes (112 words) - 12:17, 13 August 2023
  • In software engineering, more specifically in distributed computing, observability is the ability to collect data about programs' execution, modules' internal...
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  • partially observable system is one in which the entire state of the system is not fully visible to an external sensor. In a partially observable system the...
    1 KB (230 words) - 17:46, 30 December 2022
  • {y}}(t)={\boldsymbol {Cx}}(t)+{\boldsymbol {Du}}(t)\end{array}}} is observable, where A {\displaystyle {\boldsymbol {A}}} , B {\displaystyle {\boldsymbol...
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  • Thumbnail for Stealth technology
    Stealth technology, also termed low observable technology (LO technology), is a sub-discipline of military tactics and passive and active electronic countermeasures...
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  • A partially observable Markov decision process (POMDP) is a generalization of a Markov decision process (MDP). A POMDP models an agent decision process...
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  • can only be inferred indirectly through a mathematical model from other observable variables that can be directly observed or measured. Such latent variable...
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  • In quantum mechanics, a complete set of commuting observables (CSCO) is a set of commuting operators whose common eigenvectors can be used as a basis...
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  • Thumbnail for Phenomenon
    A phenomenon (pl. phenomena), sometimes spelled phaenomenon, is an observable event. The term came into its modern philosophical usage through Immanuel...
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  • programming languages. ReactiveX is an API for asynchronous programming with observable streams. Asynchronous programming allows programmers to call functions...
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  • different situations, depending on whether every sequential state is observable or not, and whether the system is to be adjusted on the basis of observations...
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  • metaphysics. A Ramsey sentence aims at rendering propositions containing non-observable theoretical terms (terms employed by a theoretical language) clear by...
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  • Thumbnail for Hubble volume
    sphere, causal sphere and sphere of causality is a spherical region of the observable universe surrounding an observer beyond which objects recede from that...
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  • variables. Observability is a measure for how well internal states of a system can be inferred by knowledge of its external outputs. The observability and controllability...
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  • Thumbnail for Dynatrace
    Inc. is an American multinational technology company that provides an observability platform. Their software is used to monitor, analyze, and optimize application...
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  • Thumbnail for Starlight
    radiation from stars other than the Sun, observable from Earth at night, although a component of starlight is observable from Earth during daytime. Sunlight...
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  • existence, nature, properties, qualities or relations are not directly observable by humans. In philosophy of science, typical examples of "unobservables"...
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  • Thumbnail for James A. Yorke
    James A. Yorke (born August 3, 1941) is a Distinguished University Research Professor of Mathematics and Physics and former chair of the Mathematics Department...
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  • systems by rephrasing the gravitational waves in terms of the manifestly observable Riemann curvature tensor. At the time, Pirani's work was overshadowed...
    106 KB (12,709 words) - 07:15, 2 June 2025
  • The no-observed-adverse-effect level (NOAEL) denotes the level of exposure of an organism, found by experiment or observation, at which there is no biologically...
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  • theories. For this role, evidence must be public and uncontroversial, like observable physical objects or events and unlike private mental states, so that evidence...
    38 KB (3,946 words) - 05:50, 8 June 2025
  • Thumbnail for Shape of the universe
    observational evidence (WMAP, BOOMERanG, and Planck for example) imply that the observable universe is spatially flat to within a 0.4% margin of error of the curvature...
    32 KB (3,690 words) - 17:31, 28 May 2025
  • In high energy physics, event shapes observables are quantities used to characterize the geometry of the outcome of a collision between high energy particles...
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  • the distance from which one could possibly retrieve information. This observable constraint is due to various properties of general relativity, the expanding...
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  • Thumbnail for Universe
    the Milky Way, which is one of a few hundred billion galaxies in the observable universe. Many of the stars in a galaxy have planets. At the largest scale...
    153 KB (15,934 words) - 10:16, 29 May 2025
  • In digital logic, a don't-care term (abbreviated DC, historically also known as redundancies, irrelevancies, optional entries, invalid combinations, vacuous...
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  • Thumbnail for Datadog
    Datadog, Inc. is an American company that provides an observability service for cloud-scale applications, providing monitoring of servers, databases,...
    19 KB (1,576 words) - 20:04, 5 June 2025