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Ralph Kimball
Ralph Kimball, American data warehouse pioneer, author of The Data Warehouse Toolkit (1996), founder of Red Brick Systems and the Kimball Group, who formalized and popularized dimensional modeling and the star schema; his bottom-up method is usually contrasted with Bill Inmon's top-down approach.
Ralph Krupke
Ralph Krupke is a German nanoscientist, professor of molecular nanostructures at TU Darmstadt since 2011, best known for the 2003 dielectrophoretic separation of metallic from semiconducting carbon nanotubes.
Ralph L. Keeney
Ralph L. Keeney is an American decision analyst, emeritus professor at Duke and USC, known for value-focused thinking and elected to the National Academy of Engineering in 1995.
Ralph Merkle
Ralph Merkle, born 1952 in Berkeley, California, is an American computer scientist who independently invented public-key cryptography in 1974 and created the Merkle tree data structure.
Ralph Modjeski
Ralph Modjeski, born Rudolf Modrzejewski, was a Polish-born American civil engineer, one of the pre-eminent American bridge designers, who worked in truss, cantilever, and suspension construction.
Ralph Rossetti
Ralph Rossetti was a researcher at Bell Laboratories in Murray Hill, New Jersey, first author of the 1983 quantum size effect paper cited in the 2023 Nobel Prize background.
Ralph S. Gens
Ralph S. Gens was an American electric power transmission engineer who led Bonneville Power Administration's 500 kV grid and HVDC introduction, elected to the NAE in 1983.
Ralph T. Yang
Ralph T. Yang (1942–2025) was a Chinese-born American chemical engineer at the University of Michigan, known for inventing zeolite and metal-organic framework adsorbents for fuel desulfurization and carbon dioxide capture.
Ram 1500 (DS)
The Ram 1500 (DS) is the fourth generation of Ram's full-size pickup truck, launched as the Dodge Ram 1500 in 2009 and built through 2018, competing with the Ford F-150 and Chevrolet Silverado 1500.
Ram 1500 REV
The Ram 1500 REV is a range-extended electric pickup truck from Stellantis' Ram brand, pairing a 92-kWh battery with a gasoline generator for up to 690 miles of range.
Ram accelerator
A ram accelerator is a hypervelocity launch device in which a ramjet-like projectile flies through a tube of combustible gas, reaching velocities above 2.6 km/s.
Ram air turbine
A ram air turbine (RAT), also called an air-driven generator, is a wind-driven turbine stowed in an aircraft and deployed into the airstream to supply emergency power when engines and auxiliary sources fail.
RAM drive
A RAM drive, also called a RAM disk, is a portion of a computer's main memory used as a storage drive, losing its contents at shutdown.
Ram Heavy Duty (fifth generation)
The fifth-generation Ram Heavy Duty is Ram's 2500 and 3500 pickup line, introduced for 2019 around a Cummins diesel that first exceeded 1,000 lb-ft of torque.
Ram Mandir (राम मंदिर)
Ram Mandir, formally the Shri Ram Janmabhoomi Mandir, is a Hindu temple in Ayodhya, India, consecrated in 2024 at the site Hindus believe to be Ram's birthplace.
Ram pickup
The Ram pickup, sold as the Dodge Ram until 2011, is a line of full-size pickup trucks built by Stellantis, since 2019 America's number-two full-size pickup.
Ram Rajagopal
Ram Rajagopal is a Stanford associate professor of civil and environmental engineering who directs the Stanford Sustainable Systems Lab, working on sensing, data analytics, and stochastic control for integrating renewables into power grids.
Ram Trucks
Ram Trucks is a truck and commercial vehicle brand of Stellantis, selling pickups like the Ram 1500 and ProMaster vans; it became a stand-alone division in 2009.
Ramaco Resources
Ramaco Resources is an American coal mining company in West Virginia and Virginia, founded by Randall Atkins in 2011, now developing rare earths at its Brook Mine in Wyoming.
Ramada
Ramada, also known as Ramada Inn, is a midscale hotel brand franchised by Wyndham Hotels & Resorts, founded in 1954 as a roadside motel chain in Flagstaff, Arizona.
Ramadan oil field
The Ramadan oil field is an offshore oil field in the central Gulf of Suez, Egypt, discovered in 1974 with reserves of several hundred million barrels and operated by GUPCO.
Ramagundam Fertilizers and Chemicals
Ramagundam Fertilizers and Chemicals is an Indian joint venture company that owns and operates a natural gas-based ammonia and urea plant at Ramagundam in Peddapalli district, Telangana.
Ramagundam power station
Ramagundam Super Thermal Power Station is a 2,600 MW coal-fired power station owned by NTPC Limited at Ramagundam in Telangana, India, commissioned from 1983 onward.
Ramalingam Chellappa
Ramalingam Chellappa, known as Rama Chellappa, is a computer vision researcher and Bloomberg Distinguished Professor at Johns Hopkins, known for face and gait recognition and a National Academy of Engineering member.
Ramamoorthy Ramesh
Ramamoorthy Ramesh, also published as R. Ramesh, is an Indian-born American materials physicist at UC Berkeley known for solving ferroelectric fatigue and electric-field control of magnetism.
Raman amplification
Raman amplification is a fiber-optic technique that amplifies communication signals by stimulated Raman scattering, turning the transmission fiber itself into a broadband gain medium used in long-haul systems.
Raman amplifier
A Raman amplifier is an optical amplifier that uses stimulated Raman scattering to transfer energy from a pump laser to an optical signal, most often within optical fiber.
Raman I. Sujith
Raman I. Sujith, born 1967, is an Indian aerospace engineer and Institute Professor at IIT Madras known for applying dynamical systems theory to thermoacoustic instability.
Ramanathaswamy Temple (இராமநாதசுவாமி கோயில்)
Ramanathaswamy Temple (இராமநாதசுவாமி கோயில்), also called Rameswaram Temple, is a Hindu temple to Shiva on Pamban Island in Tamil Nadu, India, one of the twelve Jyotirlinga shrines.
Ramappa Temple
Kakatiya Rudreshwara (Ramappa) Temple, also called Ramalingeswara Temple, is a 13th-century Shiva temple at Palampet, Telangana, begun 1213 CE, known for its sandbox foundation, floating bricks, and 2021 UNESCO World Heritage inscription.