Technology and the built world

Dilution of precision (navigation)

Dilution of precision (DOP), also called geometric dilution of precision, is a unitless satellite navigation measure of how satellite geometry amplifies ranging errors in position.

Dilwara Temples

Dilwara Temples (Delwara, Delvada): five Jain temples near Mount Abu, Rajasthan, built 1031–1582, famed for intricate white marble interiors, Māru-Gurjara style, Śvētāmbara Pancha Tirtha status.

Oct 22, 2026

DimeNet

DimeNet, short for directional message passing neural network, is a graph neural network that predicts quantum-mechanical properties of molecules using both interatomic distances and angles.

Dimension (data warehouse)

A dimension, or data dimension, is a data warehouse table of descriptive attributes such as customer, product, or date, joined to a central fact table in a star schema.

Oct 26, 2026

Dimension table: in data warehousing, the table storing descriptive attributes (product, customer, date) that give context to numeric facts in a fact table; wide, few rows, surrogate-keyed, star schema component per Kimball.

Sep 29, 2026

Dimensional modeling

Dimensional modeling is a data warehouse design method organizing numeric measurements into fact tables surrounded by denormalized dimension tables, presented by Ralph Kimball and Kevin Strehlo in 1995.

Dimensionality reduction

Dimensionality reduction, also called dimension reduction, transforms high-dimensional data into fewer coordinates while minimizing information loss, through linear methods such as PCA and nonlinear manifold methods such as t-SNE and UMAP.

Oct 22, 2026

Dimensionally stable anode

A dimensionally stable anode (DSA) is an inert electrode for industrial electrolysis, a titanium substrate coated with mixed metal oxides such as RuO2 and TiO2.

Dimensioning, weighing and scanning

Dimensioning, weighing and scanning (DWS) is a warehouse data-capture method in which one system measures a parcel's dimensions, records its weight, and reads its barcode for billing.

Dimitar P. Filev

Dimitar P. Filev is an engineer who spent 28 years at Ford Motor Company as Senior Henry Ford Technical Fellow and was elected to the National Academy of Engineering in 2018.

Dimitri A. Antoniadis

Dimitri A. Antoniadis is a Greek-born electrical engineer and emeritus MIT professor known for pioneering contributions to MOSFETs and silicon process modeling, including the SUPREM simulators.

Dimitri Bertsekas

Dimitri Bertsekas (1942–2026) was a researcher in optimization, dynamic programming, and reinforcement learning, a longtime MIT professor who moved to Arizona State University in 2019 and wrote more than 20 influential textbooks.

Dimitris I. Collias

Dimitris I. Collias is a retired Procter & Gamble Research Fellow in chemical engineering, elected to the National Academy of Engineering in 2023 for sustainable plastics innovations.

Dimitris Metaxas

Dimitris N. Metaxas is a computer scientist and Distinguished Professor at Rutgers University, known for physics-based deformable models in computer vision, medical image analysis, and computer graphics.

DIMM

A DIMM, or dual in-line memory module, is a circuit board carrying RAM chips that plugs into a motherboard to provide a computer's main memory.

Dimmer

A dimmer is a device that adjusts a lamp's light output between off and full brightness, most commonly by phase-cut dimming, which switches off part of each AC half-cycle.

Dimos Poulikakos

Dimos Poulikakos (born 1955) is a thermodynamicist who was Professor of Thermodynamics at ETH Zurich from 1996 to 2024, having founded its Laboratory of Thermodynamics in Emerging Technologies.

DIN connector

A DIN connector, also called a DIN plug, is a circular connector standardized by the German Institute for Standardization and long used for audio, MIDI, and keyboard signals.

Dina 2 Gas Field

Dina 2 Gas Field (迪那2气田) is an abnormally high-pressure condensate gas field in the Tarim Basin, Xinjiang, China, producing for the West-East Gas Pipeline since 2009.

Dina Katabi

Dina Katabi is a Syrian-born computer scientist and electrical engineer at MIT known for wireless networking research and for contactless health sensing using radio signals and AI.

Dinawan Energy Hub

The Dinawan Energy Hub is a proposed hybrid wind, solar, and battery project of up to 2 GW in the Riverina region of New South Wales, developed by Spark Renewables.

Dinesh Manocha

Dinesh Manocha is a computer scientist at the University of Maryland known for work in robotics, computer graphics, and autonomous driving, after 26 years at UNC Chapel Hill.

Ding-A-Ling (robot)

Ding-A-Lings were a line of battery-powered toy robots produced by Topper Toys of Elizabeth, New Jersey, from 1971, which walked using a removable power pack; the 14-inch King Ding led the line.

Dingbat

A dingbat, also called a printer's ornament, is a decorative typographic symbol such as a star or pointing hand; digital symbol fonts like Wingdings are dingbat fonts.

Dinghy

A dinghy, from the Hindi dingi, is a small open boat propelled by oars, motor, or sails, used for pleasure, racing, or ferrying people between ship and shore.

Dinginin power station

Dinginin power station is a two-unit, supercritical coal-fired power plant in Mariveles, Bataan, on Manila Bay; at about 1,336 MW it is the largest coal plant in the Philippines.

Dingji Coal Mine

Dingji Coal Mine (丁集煤矿) is an underground coal mine in Fengtai County, Huainan, Anhui, China, begun in 2004 and producing up to 6 million tonnes of coal per year.

DingTalk

DingTalk (钉钉) is Alibaba Group's enterprise communication and collaboration platform, launched in January 2015, combining messaging, documents, meetings, and AI features, with 700 million users and over 26 million organizations.

Dingzhou power station

Dingzhou power station (定州电厂), also known as the Guohua Dingzhou power plant, is a coal-fired power station in Kaiyuan Town, Dingzhou, Hebei, China, with four units totaling 2,520 MW.