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energy-density spectrum

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  • Energy harvesting — (also known as Power harvesting or energy scavenging ) is the process by which energy is captured and stored. Frequently this term is applied when speaking about small autonomous devices, like those used in sensor networks. A variety of different …   Wikipedia

  • Zero-point energy — is the lowest possible energy that a quantum mechanical physical system may have; it is the energy of its ground state. All quantum mechanical systems undergo fluctuations even in their ground state and have an associated zero point energy, a… …   Wikipedia

  • Energy-dispersive X-ray spectroscopy — (EDS, EDX or EDXRF) is an analytical technique used for the elemental analysis or chemical characterization of a sample. As a type of spectroscopy, it relies on the investigation of a sample through interactions between electromagnetic radiation… …   Wikipedia

  • List of energy topics — This is a list of energy topics which identifies articles and categories that relate to energy in general. Energy refers to the ability to do work . The word is used in several different contexts. The engineering use has a precise, well defined… …   Wikipedia

  • Outline of energy — See also: Index of energy articles In physics, energy (from the Greek ἐνέργεια – energeia, activity, operation , from ἐνεργός – energos, active, working [1]) is a scalar physical quantity that describes the amount of work that can be performed by …   Wikipedia

  • Energy level — A quantum mechanical system or particle that is bound that is, confined spatially can only take on certain discrete values of energy. This contrasts with classical particles, which can have any energy. These discrete values are called energy… …   Wikipedia

  • Density matrix renormalization group — The density matrix renormalization group (DMRG) is a numerical variational technique devised to obtain the low energy physics of quantum many body systems with high accuracy. It was invented in 1992 by Steven R. White and it is nowadays the most… …   Wikipedia

  • Dark energy — Not to be confused with dark matter, dark fluid, or dark flow. Physical cosmology …   Wikipedia

  • Radiant energy — Visible light (a form of radiant energy) scattered by fog in a forest. Radiant energy is the energy of electromagnetic waves.[1] The quantity of radiant energy may be calculated by integrating radiant flux (or power) with respect to time and …   Wikipedia

  • Surface energy — [ Contact angle measurements can be used to determine the surface energy of a material. Here, a drop of water on glass.] Surface energy quantifies the disruption of intermolecular bonds that occurs when a surface is created. In the physics of… …   Wikipedia

  • The Dark Energy Survey — DES logo The Dark Energy Survey (DES) is a survey that aims to probe the dynamics of the expansion of the universe and the growth of large scale structure. The collaboration is composed of research institutes and universities from United… …   Wikipedia

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