edgepedia

Technology and the built world

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Rough Oil and Gas Field

Rough is a depleted natural gas field in the Southern North Sea, about 29 kilometers off Yorkshire, which served from 1985 as the United Kingdom's largest gas storage site.

Rough Point

Rough Point is a Gilded Age mansion and house museum on Bellevue Avenue in Newport, Rhode Island, built for Frederick W. Vanderbilt and later the home of heiress Doris Duke.

Rough set

A rough set is a mathematical tool for analyzing vague or incomplete data, introduced by Zdzisław Pawlak in 1982 and widely used for feature selection in data mining.

Roulette wheel selection

Roulette wheel selection, also called fitness-proportionate selection, is a selection operator for evolutionary algorithms in which each individual's chance of reproduction equals its fitness divided by the population's total fitness.

Round rail

A round rail is a linear motion guide in which a ball bushing bearing travels along a hardened cylindrical shaft to carry a load in a straight line.

Round-robin scheduling

Round-robin scheduling is a preemptive scheduling method in which each task runs for a fixed time quantum, then returns to the back of the ready queue for another turn.

Round-trip efficiency

Round-trip efficiency is the percentage of energy put into a storage system that comes back out over a full charge-discharge cycle, from about 90% for lithium-ion to 30% for hydrogen.

Roundabout

A roundabout, also called a traffic circle, is a circular intersection where entering traffic yields to traffic circulating at reduced speed around a central island, reducing crashes.

Roundel

A roundel is a circular national insignia of concentric colored rings painted on military aircraft to show nationality, borrowed from heraldry and first adopted by France in 1912.

Roundtable on Sustainable Biomaterials

The Roundtable on Sustainable Biomaterials, or RSB, is a Swiss-based multi-stakeholder organization founded in 2007 that certifies bio-based products, and is an ICAO-recognized scheme for CORSIA-eligible sustainable aviation fuel.

Roundtable on Sustainable Palm Oil

The Roundtable on Sustainable Palm Oil is a voluntary, nonprofit multi-stakeholder association founded in Switzerland in 2004 that sets global standards for certified sustainable palm oil, including no-deforestation rules.

Route 1 (Iceland)

Route 1, called the Ring Road (Hringvegurinn), is Iceland's longest road, a 1,322 km highway encircling the country and connecting Reykjavík to nearly every region.

Route 2 Gas Pipeline

The Route 2 Gas Pipeline (Gasoduto Rota 2) is a Brazilian subsea natural gas pipeline serving the Santos Basin pre-salt fields, in operation since 2016.

Route 3 Gas Pipeline

The Route 3 Gas Pipeline (Gasoduto Rota 3) is a 355 km natural gas pipeline operated by Petrobras, carrying Santos Basin pre-salt gas to the Boaventura complex in Itaboraí, Brazil.

Route choice model

A route choice model is a discrete-choice method in transportation research that predicts which paths travelers select between an origin and a destination, producing assigned traffic flows.

Router (computing)

A router, also called a network router, is a computer that connects two networks and forwards data packets, most commonly IP packets, along the best route.

Router (woodworking)

A wood router is a woodworking power tool with a vertically mounted spindle that spins a router bit at high speed to cut grooves, shape edges, and form joints.

Router advertisement

A Router Advertisement is an ICMPv6 message an IPv6 router sends to tell hosts which router to use as the default gateway and how to configure addresses.

Router collapse

Router collapse is a Mixture-of-Experts training failure in which the router sends most tokens to a few experts, leaving other experts under-trained and model capacity unused.

RouterOS

RouterOS is the Linux-based network operating system from MikroTik, a Latvian company founded in 1996, first released in 1997 to power MikroTik routers, switches, and wireless devices.

Routh impact model

The Routh impact model is a graphical method introduced by Edward John Routh in 1860 that tracks frictional impulse during collisions of rigid bodies with dry friction.

Routing

Routing, also known as network routing, is the process of selecting paths for data packets across interconnected networks; routers use routing tables and protocols such as OSPF and BGP.

Routing and wavelength assignment

Routing and wavelength assignment (RWA) is the NP-hard problem in wavelength-routed optical WDM networks of choosing a physical path and wavelength for each connection so lightpaths sharing a fiber differ in wavelength.

Routing Information Protocol

The Routing Information Protocol (RIP) is a distance-vector interior gateway protocol that lets routers in an IP network exchange routing information using hop count, standardized in 1988.

Routing protocol

A routing protocol is a protocol by which routers exchange network reachability information and compute packet paths, populating forwarding tables; major examples include OSPF, IS-IS, RIP, EIGRP, and BGP.

Routing table

A routing table, also called a Routing Information Base, is a data structure in an IP router or host that maps network prefixes to next hops for packet forwarding.

Routing Transformer

The Routing Transformer is a sparse-attention transformer architecture introduced by Google Research in 2020, which routes each query to a k-means cluster of context tokens.

ROV Kiel 6000

ROV Kiel 6000 is a deep-diving, electrically powered work class remotely operated vehicle run by GEOMAR in Kiel, Germany, rated to 6000 m, built by Schilling Robotics in 2008.

Rove Tunnel

The Rove Tunnel (tunnel du Rove) is a disused canal tunnel near Marseille, France, linking the port to the Étang de Berre; closed since a 1963 collapse, it remains the world's longest canal tunnel.

Rover (marque)

Rover is a British automotive marque from Coventry, founded as a bicycle maker in 1878 and building cars from 1904 until its collapse in 2005.