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Envelope tracking
Envelope tracking is a power-management technique for radio-frequency transmitters in which the power amplifier's supply voltage is modulated to follow the signal envelope, reducing wasted energy.
Envestra
Envestra was an Australian natural gas distributor, headquartered in Adelaide and ASX-listed from 1997, serving about 1.2 million consumers across five states and territories before its 2014 takeover by the Cheung Kong Consortium.
Envirobot
Envirobot is a sensor-equipped, eel-like swimming robot developed in Switzerland by EPFL and partner institutions to locate the sources of water pollution in lakes and watercourses.
Environment Act 2021
The Environment Act 2021 is a UK Act of Parliament that creates a post-Brexit framework for environmental governance, covering waste, air quality, water, and biodiversity.
Environment Agency
The Environment Agency, known in Welsh as Asiantaeth yr Amgylchedd, is the environmental regulator of England, created in 1995 and responsible for flood risk and water quality.
Environment variable
An environment variable, or env var, is a name=value string a process carries in its environment, inherited by child processes without explicit passing, across Unix and Windows.
Environment, health and safety
Environment, health and safety (EHS, also HSE) is the corporate discipline combining environmental management, occupational safety and health, and regulatory compliance, anchored by OSHA and EPA in the US and ISO 14001 and ISO 45001 worldwide.
Environmental barrier coating
An environmental barrier coating (EBC) is a protective ceramic layer, typically rare-earth silicates over a silicon bond coat, applied to silicon carbide composites in gas turbine engines to stop water vapor recession.
Environmental chamber
An environmental chamber, also known as a climate chamber or environmental test chamber, is an enclosure that reproduces conditions like temperature, humidity, and vibration to test products.
Environmental effects of aviation
The environmental effects of aviation are the impacts of aircraft on climate, air quality, and noise; aviation contributes about 4 percent of human-caused climate forcing.
Environmental engineering
Environmental engineering, also called environmental health engineering, is the branch of engineering that applies scientific and engineering principles to protect human health and improve environmental quality.
Environmental impact of AI
The environmental impact of AI is its effect on energy use, emissions, water, and electronic waste, mainly from data centers, balanced against AI's potential to cut emissions.
Environmental impact of concrete
The environmental impact of concrete comes chiefly from Portland cement, made by heating limestone and clay, which releases CO2 equal to roughly 8% of global emissions.
Environmental impact of nuclear power
Environmental effects of nuclear power: the environmental impact of nuclear power spans uranium mining, plant operation and cooling, radioactive waste, and accidents, with very low lifecycle carbon emissions.
Environmental Product Declaration
An Environmental Product Declaration (EPD) is a standardized, third-party verified document reporting a product's quantified environmental impacts over its life cycle, based on ISO 14025 and a life cycle assessment.
Environmental Sample Processor
The Environmental Sample Processor (ESP) is an autonomous robotic instrument developed by MBARI that filters seawater and identifies organisms, biological toxins, and environmental DNA without returning samples to a laboratory.
Environmental sensing capability
An environmental sensing capability (ESC) is an FCC-certified network of radio sensors that detects federal naval radar in the CBRS band so commercial devices can be moved.
Environmental technology
Environmental technology, also called green or clean technology, is the development of technologies that protect the environment, pollute less, recycle more, and handle waste sustainably, a field defined by the 1992 Rio Earth Summit's Agenda 21.
Envisat
Envisat (Environmental Satellite) was a European Space Agency Earth observation satellite launched in 2002. At eight tonnes with ten instruments, it was the largest of its kind.
EnVision
EnVision is a European Space Agency Venus orbiter, adopted in 2024 as an M5 Cosmic Vision mission, scheduled to launch in 2031 to study Venus from core to atmosphere.
Envision AESC
Envision AESC is a Yokohama-based maker of lithium-ion battery cells for electric vehicles, founded by Nissan and NEC in 2007 and sold to Envision Group in 2019.
Envision Energy
Envision Energy (远景能源) is a Chinese green technology company headquartered in Shanghai, founded in 2007 by Zhang Lei and ranked second among global wind turbine suppliers in 2024.
Envision Group (远景科技)
Envision Group (远景科技) is a Chinese green-technology company founded by Zhang Lei in Jiangyin, spanning wind turbines, batteries, green hydrogen, and software through subsidiaries including Envision Energy and Envision AESC.
Enviva
Enviva is an American company headquartered in Bethesda, Maryland, and the world's largest industrial producer of wood pellets, a biomass fuel burned in power stations.
Envoy (proxy)
Envoy is an open source layer 7 proxy and communication bus designed for large, service-oriented architectures, originally built at Lyft and now a graduated CNCF project.
Envoy Air
Envoy Air, formerly American Eagle Airlines, is a wholly owned regional airline subsidiary of American Airlines Group, headquartered in Irving, Texas, that flies under the American Eagle brand.
Enyuan Hu
Enyuan Hu is a battery chemist at Brookhaven National Laboratory who studies lithium metal, lithium sulfur, and solid-state batteries using synchrotron x-ray and neutron scattering.
Enzymatic hydrolysis
Enzymatic hydrolysis is the enzyme-driven breakdown of cellulose in plant biomass into soluble sugars, under mild conditions, and serves as the central conversion step in biochemical cellulosic ethanol production.
Enzymatic transesterification
Enzymatic transesterification is the lipase-catalyzed conversion of oils and fats into biodiesel, offering mild conditions and direct use of waste oils, but limited by high enzyme cost and slower reactions.
Enzyme induced carbonate precipitation
Enzyme induced carbonate precipitation (EICP) is a ground improvement method in which urease enzyme catalyzes calcium carbonate precipitation, bonding soil particles to strengthen sands, control dust, and heal cracks.