All articles A–Z
519,064 articles
Dispersion-managed soliton
A dispersion-managed soliton is an optical pulse that propagates stably along fiber whose dispersion alternates periodically, breathing in width and power; proposed in 1995, it underpinned transoceanic systems.
Dispersion-shifted fiber
Dispersion-shifted fiber (DSF), standardized as ITU-T G.653, is single-mode optical fiber with its zero-dispersion wavelength shifted into the low-loss 1550 nm window, best suited to single-channel long-haul systems.
Dispersive liquid–liquid microextraction
Dispersive liquid–liquid microextraction (DLLME) is a sample preparation method in analytical chemistry, introduced in 2006, that concentrates dissolved analytes into a tiny sedimented solvent drop before analysis.
Dispersive prism
A dispersive prism is a triangular block of glass or other transparent material that spreads white light into a spectrum because its refractive index varies with wavelength.
Dispersive readout
Dispersive readout is a technique for measuring quantum bits, in which a qubit coupled off-resonantly to a microwave resonator shifts the resonator's frequency depending on its state.
Dispersive solid phase extraction
Dispersive solid phase extraction (d-SPE) is a sample preparation method in which sorbent particles are dispersed directly into a liquid sample to remove interferences or preconcentrate analytes, serving as the cleanup step of the QuEChERS workflow.
Disphyllum
Disphyllum is an extinct Devonian genus of fasciculate colonial rugose corals (family Disphyllidae), type species Cyathophyllum caespitosum Goldfuss 1826, cosmopolitan in Givetian and Frasnian limestones of Europe, Asia, and Australia.
Displacement (geometry)
Displacement, also called a displacement vector, is the change in position of a point, a vector with both magnitude and direction; in geometry it defines a translation.
Displacement (psychology)
Displacement (psychology): a psychoanalytic defense mechanism transferring feelings from their original object to a less threatening target; classified as a neurotic-level defense, with contested empirical support.
Displacement (ship)
Displacement, also called ship displacement or displacement tonnage, is the actual mass of a ship and everything aboard, equal by Archimedes' principle to the water displaced.
Displacement chromatography
Displacement chromatography is a chromatography mode, discovered by Arne Tiselius in 1943, in which a strongly binding displacer pushes sample components into consecutive rectangular bands rather than peaks.
Displacement current
The displacement current, also called Maxwell's displacement current, is a term James Clerk Maxwell added to Ampère's law so a changing electric field produces a magnetic field.
Displacement hull
A displacement hull is a boat or ship hull supported entirely by buoyancy, used in most commercial shipping and sailboats, and limited by wave-making resistance at hull speed.
Displacement method (structural analysis)
The displacement method, also called the stiffness method, is a structural analysis method taking joint displacements and rotations as unknowns; its matrix form underlies the finite element method.
Displacement of eyeball
Displacement of eyeball (眼球偏位), ICD-11 code 9A20 under Disorders of orbit, covers axial (proptosis, enophthalmos) and non-axial globe displacement; main adult cause is thyroid eye disease, measured by exophthalmometry or CT.
Displacement plethysmography
Displacement plethysmography is a family of diagnostic techniques measuring volume change of a limb or whole body by detecting displaced fluid or air, including air-displacement plethysmography.
Displacement ventilation
Displacement ventilation is a room air distribution method that supplies slightly cool air at low velocity near the floor, so warm, contaminated air rises to a ceiling exhaust.
Displate
Displate is a Polish e-commerce company founded in Warsaw in 2013 that sells metal posters printed on stainless steel, hung with a tool-free magnetic mounting system.
Display aspect ratio
Display aspect ratio (DAR) is the width-to-height ratio of a video frame at playback, related to storage and pixel aspect ratios by DAR = SAR × PAR; common values include 4:3, 16:9, 1.85:1, and 1.90:1.
Display device
A display device, also called an information display, is an output device that converts computer signals into visible images or text, most often on flat panels.
Display resolution
Display resolution, also known as screen resolution, is the number of pixels a display shows, written as width × height, such as 1920 × 1080.
Display size
Display size, also called screen size or viewable image size, is the physical size of a display, measured as the diagonal of the viewable image in inches.
Display Stream Compression
Display Stream Compression (DSC) is a visually lossless, low-latency image compression standard developed by VESA, first published in 2014 for display interfaces like DisplayPort and HDMI.
Display typeface
A display typeface, also called a display font, is a typeface designed to be used at large sizes for titles, headlines, posters, and signage rather than body text.
DisplayPort
DisplayPort is a digital display interface standard developed by VESA, first released in 2006 to carry video, audio, and data from a source device to a display.
Disposable Equipment
Disposable equipment: apparatus, devices, or supplies intended for one-time or temporary use (MeSH D004209); in medicine, single-use devices like syringes and catheters, regulated for reprocessing by FDA and EU MDR Article 17, with waste and carbon trade-offs versus reusables.
Disposable household and per capita income
Disposable household income is the income a household can spend or save after direct taxes and social contributions; it is the standard measure of living standards and inequality.
Disposal of human corpses
Disposal of human corpses (body disposition): burial, cremation, embalming, and newer methods alkaline hydrolysis and human composting; worldwide scale, FTC Funeral Rule, environmental impacts, and country-by-country regulation.
Disposition Matrix
The Disposition Matrix is a US government database, first reported in 2012, that catalogs terrorism suspects and the plans to track, capture, or kill them.
Disproportionality analysis
Disproportionality analysis is a family of statistical methods, including PRR, ROR, IC, and EBGM, used to detect higher-than-expected reporting of drug–adverse-event pairs in spontaneous-reporting databases.