All articles starting with E
17,681 articles
Energy (esotericism)
Energy, in esoteric and New Age contexts also called subtle or spiritual energy, is a postulated vital force, named ki, prana, or qi, held to animate living beings and underlie healing practices like Reiki.
Energy & Minerals Group
The Energy & Minerals Group is a natural-resources private equity firm founded in Houston, Texas in 2006 by John T. Raymond, with about $12 billion in assets under management.
Energy 52
Energy 52 was a German trance project of Berlin producers Cosmic Baby (Harald Blüchel) and DJ Kid Paul, known for the 1993 anthem "Café Del Mar".
Energy Act 2023
The Energy Act 2023 is a United Kingdom law covering energy production, security, and market regulation, receiving Royal Assent on 26 October 2023 as the largest energy legislation in UK history.
Energy Act of 2020
The Energy Act of 2020 is a US federal statute, signed December 27, 2020, that authorizes Department of Energy research and demonstration programs across energy efficiency, nuclear, renewables, and storage.
Energy adaptive clustering
Energy adaptive clustering is a family of clustering protocols for wireless sensor networks in which nodes use residual energy to rotate the cluster-head role and extend system lifetime.
Energy as a service
Energy as a service (EaaS) is a business model in which a provider bundles on-site generation, storage, and electricity supply, with customers paying for reliable, cheaper energy.
Energy attribute certificate
An energy attribute certificate (EAC) is a contractual instrument tracking attributes like source and emissions of a unit of energy generation, including renewable energy certificates and guarantees of origin.
Energy audit
An energy audit is a systematic analysis of energy use in a building or facility, producing a ranked report of efficiency measures with estimated savings and costs.
Energy Brands
Energy Brands Inc. (Glacéau), founded 1996 by J. Darius Bikoff in New York, created vitaminwater and smartwater and the enhanced water category; Coca-Cola acquired it in 2007 for $4.1 billion.
Energy burden
Energy burden is the share of a household's gross income spent on energy costs, the standard US benchmark for targeting programs like LIHEAP and weatherization.
Energy Capital Partners
Energy Capital Partners, or ECP, is an American private equity firm founded in 2005 and based in Summit, New Jersey, known for its $17 billion buyout of Calpine.
Energy cascade
The energy cascade is the transfer of kinetic energy across scales in a turbulent flow, from large eddies down through smaller ones until viscosity dissipates it as heat.
Energy Charter Treaty
Energy Charter Treaty (ECT): multilateral energy investment and trade agreement signed 17 December 1994, in force 16 April 1998, with Article 26 ISDS arbitration; modernised 2022-2024 amid mass European withdrawals including the EU in 2025.
Energy Community
The Energy Community is an international organization established by a treaty signed in Athens in 2005, extending the EU's internal energy market rules to nine neighboring countries.
Energy conditions (general relativity)
In general relativity, energy conditions are inequalities on the stress-energy tensor prescribing positive energy density and gravity's attractiveness, best known from Penrose and Hawking singularity theorems.
Energy confinement time and scaling laws
Energy confinement time is the ratio of stored thermal energy to heating power in a magnetically confined plasma, with empirical scaling laws predicting confinement across tokamak sizes.
Energy conservation
Energy conservation, also called energy saving, means reducing energy use through actions like turning off lights; in physics, it is the law that energy only changes form, never destroyed.
Energy Conservation Building Code
The Energy Conservation Building Code (ECBC) is India's national building energy code for commercial buildings, launched in May 2007 by the Ministry of Power through the Bureau of Energy Efficiency.
Energy conversion efficiency
Energy conversion efficiency is the ratio of useful energy output to energy input, usually a percentage, applying to power plants, solar cells, motors, and vehicles.
Energy crisis
An energy crisis, also called an energy shortage, is a widespread disruption in energy supply or a steep rise in its price, recurring since the 1970s oil shocks.
Energy decomposition analysis
Energy decomposition analysis is a computational chemistry method that splits the interaction energy between molecules into components such as electrostatics, Pauli repulsion, polarization, and charge transfer.
Energy density
Energy density, also called fuel value, is the amount of energy stored in a system per unit volume, measured in joules per cubic meter; for fuels and batteries it is reported as watt-hours per liter.
Energy detection
Energy detection is a signal-detection method used for spectrum sensing in cognitive radio, measuring received signal energy over an interval and comparing it with a threshold.
Energy development
Energy development, also called sources of energy, is the effort to produce and expand access to energy services, including electricity, clean cooking, and low-carbon sources.
Energy Development Oman
Energy Development Oman (EDO) is Oman's wholly state-owned energy holding company, established by royal decree in 2020, holding a 60 percent stake in Petroleum Development Oman and owning the green hydrogen body Hydrom.
Energy diplomacy
Energy diplomacy: use of foreign policy and diplomatic instruments to secure energy supplies, promote government-to-government energy cooperation, and manage critical minerals; also called oil diplomacy, marked by US shale-era limits and post-2022 crisis mobilization.
Energy Dome
Energy Dome is an Italian long-duration energy storage company founded in Milan in 2020, known for its CO2 Battery, which stores electricity by compressing carbon dioxide into a liquid.
Energy drink
Energy drink: caffeinated functional beverage with taurine, B vitamins, guarana, and sugars; Red Bull and Monster lead the market. Covers caffeine doses, EU/US/Australian regulation, health effects, and the sports-drink distinction.
Energy efficiency design index
The energy efficiency design index is a mandatory International Maritime Organization measure under MARPOL Annex VI that limits new ships' CO2 emissions per tonne-mile, in force since 2013.