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Rendezvous algorithms
Rendezvous algorithms are procedures by which mobile agents or robots starting from distinct positions in a graph or terrain are guaranteed to meet, also called gathering.
Rendsburg High Bridge
The Rendsburg High Bridge (Rendsburger Hochbrücke) is a steel cantilever railway bridge at Rendsburg, Germany, built between 1911 and 1913 to carry trains over the Kiel Canal.
Rendsburg Transporter Bridge
The Rendsburg Transporter Bridge (German: Schwebefähre) is a passenger-and-vehicle gondola suspended beneath the Rendsburg High Bridge, a railway viaduct over the Kiel Canal, opened in 1913 and unique worldwide.
René A. J. Janssen
René A. J. Janssen is a Dutch physical organic chemist at TU Eindhoven who leads research on organic and perovskite solar cells and won the 2015 Spinoza Prize.
Rene H. Miller
Rene H. Miller (1916–2003) was an American aerospace engineer at MIT and a pioneer of helicopter rotor aeromechanics, elected to the National Academy of Engineering in 1968.
René Harcourt Miller
René Harcourt Miller (1916–2003) was an American aerospace engineer who spent nearly sixty years at MIT, pioneered helicopter rotor aeromechanics, and headed its aeronautics department.
René P. Schwarzenbach
René P. Schwarzenbach (born 1945) is a Swiss environmental chemist and professor emeritus at ETH Zurich, known for the textbook Environmental Organic Chemistry and his 2006 Science paper on micropollutants.
René Vidal (computer scientist)
René Vidal is a computer vision and machine learning researcher, the Rachleff University Professor at the University of Pennsylvania and an Amazon Scholar, known for generalized principal component analysis and subspace clustering.
ReNew Energy Global
ReNew Energy Global is an Indian renewable energy company founded by Sumant Sinha in 2011 that develops solar, wind, hydro, and battery storage projects and manufactures solar modules.
Renewable energy
Renewable energy, also called alternative energy, is energy from continually replenished natural sources: solar, wind, hydropower, geothermal, and biomass, used for electricity, heat, and fuels.
Renewable Energy Certificate
A renewable energy certificate (REC) is a market instrument representing the environmental attributes of 1 MWh of renewable electricity, issued when that power is delivered to the grid.
Renewable energy certificates
Renewable energy certificates (RECs) are market instruments representing the attributes of one megawatt-hour of renewable electricity, the accepted instrument for renewable energy claims in the United States.
Renewable Energy Directive II
Renewable Energy Directive II (RED II), formally Directive (EU) 2018/2001, is the EU law replacing the 2009 directive, setting a binding 32% renewables target for 2030, raised to 42.5% in 2023.
Renewable Energy Directive III
Renewable Energy Directive III is the European Union's 2023 revision of its main renewable energy law, raising the binding renewables target to at least 42.5% by 2030.
Renewable energy in India
Renewable energy in India is electricity generated from solar, wind, hydro, and bio-power sources, led by the Ministry of New and Renewable Energy and targeting 500 GW of non-fossil capacity by 2030.
Renewable energy in Turkey
Renewable energy in Turkey is electricity and heat from hydropower, solar, wind, geothermal, and biomass, supplying 43.3% of electricity in 2025, led by hydropower and record solar and wind growth.
Renewable Energy Independent Power Producer Procurement Programme
The Renewable Energy Independent Power Producer Procurement Programme (REIPPPP) is South Africa's competitive tender program for procuring renewable energy from private producers, launched in 2011.
Renewable Energy Target (Australia)
The Renewable Energy Target is an Australian Government scheme requiring electricity retailers to buy renewable energy certificates, targeting 33,000 GWh of extra renewable electricity annually.
Renewable fuel of non-biological origin
A renewable fuel of non-biological origin (RFNBO) is a liquid or gaseous fuel made from renewable energy other than biomass, such as green hydrogen and synthetic fuels.
Renewable Fuel Standard
The Renewable Fuel Standard is a US federal program requiring minimum annual volumes of renewable fuel in transportation fuel, created by Congress in 2005 and expanded in 2007.
Renewable Fuels Association
The Renewable Fuels Association, organized in 1981, is the national trade association for the United States fuel ethanol industry, advocating policies that expand ethanol production.
Renewable Heat Incentive
The Renewable Heat Incentive (RHI) was a UK government scheme paying households and businesses for renewable heat they generated, with the domestic scheme running from 2014 to 2022.
Renewable Identification Number
A Renewable Identification Number (RIN) is a credit generated when renewable fuel is produced in or imported into the United States, used to demonstrate compliance with the Renewable Fuel Standard.
Renewable Identification Numbers
Renewable Identification Numbers (RINs) are credits generated for each unit of renewable fuel produced or imported in the United States under the federal Renewable Fuel Standard.
renewable natural gas
Renewable natural gas, also called biomethane, is biogas from decomposing organic matter or gasified biomass, purified to 96–98% methane so it is fully interchangeable with fossil natural gas in pipelines.
Renewable portfolio standard
A renewable portfolio standard (RPS) requires retail electricity suppliers to procure a rising minimum share of power from renewable sources; the first was Iowa's, in 1983.
Renewables Obligation
The Renewables Obligation was the United Kingdom's main support scheme for large-scale renewable electricity, obliging suppliers to present ROCs from 2002 until closure in 2017.
RenewableUK
RenewableUK, formerly the British Wind Energy Association, is the UK's principal renewable energy trade association, representing close to 500 companies across wind, energy storage, and marine energy.
Renfe
Renfe, formally Renfe Operadora, is Spain's state-owned railway operator, carrying over 535 million passengers in 2024 with services including the AVE high-speed trains and Cercanías commuter networks.
Renfe Class 333
The Renfe Class 333 is a six-axle diesel-electric locomotive built for the Spanish state railway Renfe between 1974 and 1976, and rebuilt in the 2000s.