All articles starting with G
18,970 articles
Geosynthetic pavement interlayer
A geosynthetic pavement interlayer is a planar polymeric product, such as a paving fabric or grid, placed between pavement layers to resist cracking and water infiltration.
Geosynthetic reinforcement
Geosynthetic reinforcement is the use of polymeric materials, principally geogrids and geotextiles, placed within soil to restrain deformation and increase bearing capacity, used in roads, walls, slopes, and railroads.
Geotagging
Geotagging, or geotag, is the process of adding geographic coordinates to a photo or video, typically in EXIF metadata, so photos can be mapped and searched by location.
Geotaji
Geotaji (거타지; 居陀知) is the archer-hero of a Silla tale in the Samguk Yusa, set in Queen Jinseong's reign, who killed a fox-spirit devouring the West Sea dragon god's family.
Geotechnical centrifuge modeling
Geotechnical centrifuge modeling is a physical modeling technique that spins small-scale soil models at elevated gravity, matching full-scale stresses so scaled models reproduce real foundation, dam, and slope behavior.
Geotechnical engineering
Geotechnical engineering, also known as soils engineering, is the branch of civil engineering that applies mechanics and hydraulics to soil behavior, designing foundations, retaining walls, dams, tunnels, and pavements.
Geotechnical investigation
Geotechnical investigation, also called site investigation, explores a site's soil, rock, and groundwater through drilling, in-situ testing, and laboratory testing, producing a geotechnical report that guides foundation design.
Géotechnique
Géotechnique is a peer-reviewed scientific journal covering geotechnical engineering, founded in 1948 and published monthly, spanning soil and rock mechanics, engineering geology, and environmental geotechnics.
Geotextile
Geotextile: permeable textile used with soil for filtration, drainage, separation, reinforcement, and stabilization. Woven types give tensile strength; nonwoven types filter and drain. First used 1926 in South Carolina road construction.
Geotextile tube
A geotextile tube is a large, elongated container of water-permeable geotextile fabric filled hydraulically with sand or dredged material, used in coastal protection and flood control.
Geothermal areas of Yellowstone
Geothermal areas of Yellowstone: about 120 thermal areas in Yellowstone National Park holding over 10,000 hot springs, geysers, mudpots, and fumaroles, including half of Earth's active geysers, heated by a magma chamber 5 to 10 miles below the surface.
Geothermal district heating
Geothermal district heating supplies heat from underground hot water reservoirs through a shared pipe network to many buildings; global capacity reached about 13 GWth in 2019, delivering roughly 163 PJ per year.
Geothermal doublet
A geothermal doublet is a pair of wells drilled into the same geothermal reservoir: a production well brings hot water up, and an injection well returns the cooled water.
Geothermal energy
Geothermal energy is heat drawn from reservoirs of hot water and rock beneath Earth's surface, used directly for heating or converted into continuous, carbon-free electricity.
Geothermal gradient
The geothermal gradient, also called the geothermic gradient, is the rate at which temperature rises with depth in the Earth, averaging about 25–30 °C per kilometer near the surface.
Geothermal play fairway analysis
Geothermal play fairway analysis (PFA) is a statistical exploration method, adapted from oil and gas, that combines geologic datasets into favorability maps for finding geothermal resources.
Geothermal power
Geothermal power, or geothermal electricity, is electricity generated from heat in hot rock or fluids deep underground, with plants operating in 35 countries as of 2024.
Geothermal reservoir engineering
Geothermal reservoir engineering is the branch of reservoir engineering that applies scientific principles to developing and producing geothermal reservoirs, predicting changes in pressure, temperature, and fluid flow.
Geothermal resource assessment
Geothermal resource assessment is the set of methods used to estimate the power or heat a geothermal field can sustainably deliver, relying mainly on the USGS volumetric method before drilling and numerical reservoir simulation during production.
Geothermobarometry
Geothermobarometry is the quantitative estimation of the temperature and pressure at which an igneous or metamorphic rock reached chemical equilibrium, calculated from mineral compositions and reaction thermodynamics, typically giving peak metamorphic conditions.
Geothlypis
Geothlypis (yellowthroats) is a genus of New World wood-warblers, Parulidae, established by Cabanis in 1847, with about nine species of marsh and thicket birds, yellow-bellied and black-masked, including the Common Yellowthroat.
Geotourism
Geotourism is tourism whose main attraction is a destination's geological heritage, defined by Thomas Hose in 1995 and now the principal tourism model of the 241 UNESCO Global Geoparks in 51 countries.
GEOTRACES
GEOTRACES is an international scientific program studying the distribution of trace elements and their isotopes in the ocean, with its main field effort launched in 2010.
Geotrichum
Geotrichum (Link, 1809) is a genus of arthroconidial yeast-like Ascomycota fungi in Dipodascaceae; the 2024 revision absorbed Dipodascus and Galactomyces, with G. candidum as dairy culture, food spoiler, and opportunistic pathogen.
Geotrupidae
Geotrupidae (earth-boring dung beetles, dor beetles), family Latreille 1802 of Scarabaeoidea; robust 5–45 mm burrowing beetles provisioning burrows with dung, leaves, or humus; Bolboceratinae status debated.
Geovany Quenda
Geovany Tcherno Quenda, born 2007 in Bissau, is a Portuguese left-footed winger or right wing-back developed at Sporting CP and signed by Chelsea (contract to 2034). Distinguished from namesakes by his 2024/25 Sporting debut under Amorim and €100m release clause.
GEOVIA Whittle
GEOVIA Whittle is strategic open-pit mine optimization software sold by GEOVIA, a Dassault Systèmes brand, used to evaluate deposits and plan mines to maximize net present value.
Geoy Tepe
Geoy Tepe (Göy Tepe) is a stratified archaeological mound about 7 km south of Urmia, Iran, occupied from the mid-4th millennium BC until around 1200 BC.
Gepard-class frigate
The Gepard-class frigate, Russian Project 11661, is a class of light guided-missile frigates built at the Zelenodolsk shipyard in Tatarstan, with Vietnam as its largest export customer.
Gephi
Gephi is a free, open-source desktop application for interactive visualization and analysis of networks and graphs, first released in 2008 and widely used in research, handling networks of up to 1 million nodes.