All articles starting with E

Electro house

Electro house, a house music subgenre from around 2002 fusing tech house and electroclash, runs 125-135 BPM with distorted saw basslines, sidechain pumping, and drops; pioneers Benny Benassi, D. Ramirez, deadmau5; offshoots big room, complextro, dutch house.

Electro-absorption modulated laser

An electro-absorption modulated laser (EML) combines a continuous-wave DFB laser and an electro-absorption modulator on a single indium phosphide chip, giving lower chirp and higher bandwidth than directly modulated lasers.

Electro-absorption modulator

An electro-absorption modulator (EAM) is a semiconductor device that controls light transmission by applying an electric field, enabling bandwidths above 50 GHz at low drive voltages.

Electro-chemo-mechanical contact loss in all-solid-state cells

Electro-chemo-mechanical contact loss in all-solid-state cells is degradation in which electrode volume change during cycling breaks solid-solid contact, and the rigid solid electrolyte cannot re-wet the surface.

Electro-diesel locomotive

An electro-diesel locomotive, also called a dual-mode or bi-mode locomotive, draws power from overhead wires or a third rail, plus an onboard diesel engine for non-electrified lines.

Electro-diesel multiple unit

An electro-diesel multiple unit is a self-propelled train using both diesel and electric power to run on electrified and non-electrified track. The Southern Region of British Railways first used them in 1956.

Electro-Fenton process

The electro-Fenton process is an electrochemical advanced oxidation process for water treatment that generates hydrogen peroxide at a cathode, producing hydroxyl radicals that degrade persistent pollutants.

Electro-fermentation

Electro-fermentation is a bioproduction method that combines microbial fermentation with a polarized electrode interface, acting as electron donor, acceptor, or redox controller to change yield and products.

Electro-Motive Diesel

Electro-Motive Diesel, also known as EMD, is an American locomotive maker founded in 1922 that led the switch from steam to diesel and has been owned by Caterpillar's Progress Rail since 2010.

Electro-optic modulator

An electro-optic modulator (EOM) is a device that uses the Pockels effect to control light's phase, amplitude, polarization, or frequency with an applied voltage, often built from lithium niobate.

Electro-optic sampling

Electro-optic sampling is a technique that uses the Pockels effect in an electro-optic crystal to measure the electric field waveform of ultrashort light or terahertz pulses.

Electro-oxidation

Electro-oxidation (EO) is an electrochemical method that applies a potential to an electrode to generate oxidizing species such as hydroxyl radical, used for organic electrosynthesis and degrading pollutants in water and wastewater.

Electro-swing adsorption

Electro-swing adsorption (ESA) is a carbon capture process in which electricity, rather than heat or pressure, drives the switch between adsorption and desorption of CO₂, covering Joule-heated sorbents and faradaic electrochemical cells.

Electro-swing carbon capture

Electro-swing carbon capture is a family of CO2 separation methods driven by electrochemical changes rather than heat or pressure, spanning faradaic reactive adsorption and electric swing adsorption.

Electro-swing CO2 capture

Electro-swing CO2 capture is a family of carbon capture methods in which a solid electrode adsorbs CO2 when negatively charged and releases it when the charge is reversed.

Electroacupuncture

Electroacupuncture is a treatment technique in which a small electrical current is passed between pairs of acupuncture needles inserted into the body, used in clinical medicine mainly for pain relief.

Electroanalytical methods

Electroanalytical methods, also called electroanalytical chemistry, are analytical techniques that measure potential, current, charge, or conductance in an electrochemical cell to determine a sample's composition.

Electroanatomic mapping

Electroanatomic mapping is a cardiac electrophysiology technique that builds navigable 3D maps of electrical activity in the heart chambers to guide diagnosis and catheter ablation of arrhythmias.

Electroantennography

Electroantennography (EAG) is an electrophysiological technique recording the voltage an insect antenna generates in response to odor, introduced by Dietrich Schneider in 1957 and widely used in chemical ecology.

Electrocaloric effect

The electrocaloric effect is the reversible heating and cooling of a ferroelectric material when an electric field is applied or removed, studied as the basis of solid-state refrigeration without conventional refrigerants.

Electrocaloric multilayer coolers

Electrocaloric multilayer coolers are solid-state cooling devices that use stacks of thin ferroelectric or relaxor ceramic or polymer layers, driven by electric fields, to pump heat through the electrocaloric effect.

Electrocaloric polymer cooling

Electrocaloric polymer cooling is a solid-state refrigeration approach in which ferroelectric polymer films pump heat reversibly under an electric field, pursued as a refrigerant-free alternative to vapor compression.

Electrocarboxylation

Electrocarboxylation, also called electrochemical carboxylation, is an organic electrosynthesis method that electrochemically fixes carbon dioxide into organic substrates at a cathode, forming carbon–carbon bonds and yielding carboxylic acids.

Electrocardiographic imaging

Electrocardiographic imaging (ECGI) is a noninvasive mapping method that reconstructs the heart's electrical activity from body-surface ECGs and CT geometry, used to locate arrhythmias before ablation.

Electrocardiographic monitoring

Electrocardiographic monitoring is the continuous or intermittent recording of the heart's electrical activity over hours to years, using Holter monitors, patches, telemetry, and implanted devices.

Electrocardiography

Electrocardiography (ECG/EKG) records the heart's electrical potentials at the body surface over time. Pioneered by Waller (1887) and Einthoven's string galvanometer (1901–1903, Nobel 1924), now a 12-lead standard with wearable variants.

Electrocardiography in myocardial infarction

Electrocardiography in myocardial infarction (ECG in heart attack): use of the 12-lead ECG, within 10 minutes of first contact, to detect STEMI via ST-elevation criteria, guide reperfusion, and extend with posterior and right-sided leads.

Electrocatalysis

Electrocatalysis is the catalysis of electron-transfer reactions at electrode–electrolyte interfaces, including hydrogen evolution, oxygen evolution, and CO2 reduction, underpinning fuel cells, water electrolyzers, and electrosynthesis. Quantitative study began with Haber's 1898 book.

Electrocatalyst degradation

Electrocatalyst degradation is the loss of catalyst activity or integrity in devices such as fuel cells and electrolyzers, caused by dissolution, ripening, agglomeration, and detachment.