Energy density — For energy density in the sense of energy per unit mass, see specific energy. For energy density of foods, see specific energy. Energy density is a term used for the amount of energy stored in a given system or region of space per unit volume.… … Wikipedia
Distortion free energy density — The Distortion free energy density is a quantity that describes the distortion of a liquid crystal from its preferred state in which all of the liquid crystal molecules are aligned parallel to one common axis. It also commonly goes by the name… … Wikipedia
Energy law — is the law of the use and taxation of energy, both renewable and non renewable. It is distinct from energy policy in that it consists of the primary authorities such as caselaw, statutes, rules, regulations and edicts about energy, rather than… … Wikipedia
Density functional theory — Electronic structure methods Tight binding Nearly free electron model Hartree–Fock method Modern valence bond Generalized valence bond Møller–Plesset perturbation theory … Wikipedia
Local-density approximation — The local density approximation (LDA) is an approximation of the exchange correlation (XC) energy functional in density functional theory (DFT) by taking the XC energy of an electron in a homogeneous electron gas of a density equal to the density … Wikipedia
Energy — This article is about the scalar physical quantity. For other uses, see Energy (disambiguation). Energetic redirects here. For other uses, see Energetic (disambiguation) … Wikipedia
Energy policy of the United States — The energy policy of the United States is determined by federal, state and local public entities in the United States, which address issues of energy production, distribution, and consumption, such as building codes and gas mileage standards.… … Wikipedia
Energy security — is a term for an association between national security and the availability of natural resources for energy consumption. Access to cheap energy has become essential to the functioning of modern economies. However, the uneven distribution of… … Wikipedia
Density of states — Condensed matter physics Phases · Phase tr … Wikipedia
Energy policy of India — The energy policy of India is characterized by tradeoffs between four major drivers: * Rapidly growing economy, with a need for dependable and reliable supply of electricity, gas, and petroleum products; * Increasing household incomes, with a… … Wikipedia