All articles starting with D
24,034 articles
Digital physics
Digital physics, also called computational universe theory or digital ontology, is the hypothesis that space, time, and all physical quantities are discrete and the universe is a computation.
Digital Playground
Digital Playground: American adult film studio founded 1993 by Joone (Ali Davoudian) in California; known for big-budget features like Pirates (2005), contract stars, and Aylo (ex-MindGeek) ownership since 2012.
Digital printing
Digital printing, also called electronic printing, prints a digital file directly onto paper or other media without a printing plate, making short runs and variable content economical.
Digital quantum simulation
Digital quantum simulation (DQS) is a computational method that uses a programmable quantum computer to reproduce a quantum system's time evolution as a sequence of discrete quantum gates.
Digital Radio Mondiale
Digital Radio Mondiale (DRM) is an open digital radio standard designed to replace analog AM and FM broadcasts on the same frequencies, first published as an ETSI specification in 2001.
Digital radiography
Digital radiography (DR) is a medical imaging method that captures X-ray images with electronic detectors instead of screen-film cassettes, producing digital radiographs that can be processed, stored, and displayed electronically.
Digital Realty
Digital Realty is an American real estate investment trust headquartered in Austin, Texas, that develops and operates data centers, with more than 300 facilities in over 30 countries serving 5,000 customers.
Digital Realty Dc Partners Na Fund-A
Digital Realty DC Partners NA Fund-A is a Delaware private fund formed in 2024 by Digital Realty Trust to own and develop hyperscale data centers in the United States.
Digital Realty DC Partners NA Fund-B, LP
Digital Realty DC Partners NA Fund-B, LP is a Delaware private-capital fund formed in 2024 that owns hyperscale data centers, sponsored by Digital Realty Trust.
Digital recording
Digital recording captures sound, images, or other signals as sequences of discrete numbers rather than a continuous physical trace; audio PCM's sampling rate and bit depth fix its frequency response and dynamic range.
Digital Research
Digital Research Inc. was an American software company founded by Gary Kildall and Dorothy McEwen in Pacific Grove, California, best known for CP/M, the dominant personal computer operating system of the late 1970s.
Digital rights management
Digital rights management (DRM) is any technology used to control access to and use of digital works, applied to streaming, e-books, software, and video games.
Digital root
The digital root, also called the repeated digital sum, is the single digit left after repeatedly summing an integer's digits; it equals the remainder modulo 9.
Digital Selective Calling
Digital Selective Calling (DSC) is a standardized maritime radio protocol for establishing contact between ships and coast stations, most importantly to transmit automated distress alerts.
Digital Services Act
The Digital Services Act (DSA) is an EU regulation setting harmonized rules for online platforms and search engines, requiring them to counter illegal content and protect users' rights.
Digital signage
Digital signage, sometimes called the fifth screen, uses LCD, LED, or e-paper displays to present advertising, information, and wayfinding content in public and commercial spaces, managed from central software.
Digital signal
A digital signal, also known as a logic or binary signal, takes only a finite set of amplitude values, most commonly a binary waveform switching between two voltage states.
Digital signal processing
Digital signal processing (DSP) is the deliberate alteration of digital signals, by filtering, transforms, estimation, and related operations, to improve their quality, transmission, or storage.
Digital signal processor
A digital signal processor, also called a DSP chip, is a specialized microprocessor whose architecture is optimized for real-time signal processing, notably single-cycle multiply-accumulate operations and filtering.
Digital signature
A digital signature is a cryptographic mechanism providing origin authentication, data integrity, and non-repudiation; the signer uses a private key and anyone verifies with a public key.
Digital Signature Algorithm
The Digital Signature Algorithm (DSA) is a public-key signature algorithm designed by the NSA, standardized by NIST in FIPS 186, and effective for federal use in 1994.
Digital single-lens reflex camera
A digital single-lens reflex camera, or DSLR, is a digital camera whose hinged mirror and pentaprism direct light from the interchangeable lens into an optical viewfinder.
Digital smile design
Digital smile design (DSD) is a digital dentistry workflow that uses facial and intraoral photographs, video, and software to analyze smile esthetics and plan cosmetic treatment, producing a digital wax-up and mock-up.
Digital soil mapping
Digital soil mapping (DSM) is a geospatial method that predicts soil properties or classes across a landscape by fitting quantitative relationships between soil observations and environmental data layers.
Digital sovereignty
Digital sovereignty is the capacity of a state to operate autonomously in the digital realm. The EU aims to triple its data center capacity within 5 to 7 years.
Digital spatial profiling
Digital spatial profiling (DSP) is a spatial omics method that quantifies dozens to thousands of proteins or transcripts in selected regions of tissue sections, commercialized as GeoMx and reported in 2020.
Digital subcarrier multiplexing
Digital subcarrier multiplexing (DSCM), also written DSM, is a coherent optical technique that divides a data stream into digitally generated subcarrier channels with lower symbol rates and greater dispersion tolerance.
Digital subscriber line
Digital subscriber line (DSL) is a family of technologies, collectively xDSL, that carries broadband data over telephone copper lines at the same time as voice calls.
Digital subtraction angiography
Digital subtraction angiography (DSA): fluoroscopic X-ray technique subtracting a pre-contrast mask image from contrast-filled frames to show vessels; gold standard in neurovascular imaging since 1980.
Digital television
Digital television (DTV), or digital TV, transmits television sound, pictures, and data digitally, fitting more channels into the same spectrum, supporting high-definition pictures, and showing a cliff effect at weak signals.