42,772 articles
Radon measure
A Radon measure is a Borel measure on a Hausdorff space that is locally finite and inner regular, meaning every Borel set is approximated by compact subsets; Johann Radon introduced it in 1913.
Radon mitigation
Radon mitigation is the set of techniques for reducing radon, a radioactive soil gas, inside buildings, most commonly by drawing soil gas away from the foundation.
Radon transform
The Radon transform is an integral transform mapping a function to its integrals over lines or hyperplanes, introduced by Johann Radon in 1917 and central to CT image reconstruction.
Radon-222
Radon-222, also called radium emanation, is a colorless radioactive noble gas with a 3.82-day half-life that forms from radium decay and is the leading source of indoor radiation exposure.
Radoslav R. Adžić
Radoslav R. Adžić, also known as Radoslav Adzic, is a Serbian electrochemist who pioneered platinum monolayer and core-shell electrocatalysts that cut platinum use in hydrogen fuel cells.
Rafael Irizarry (biostatistician)
Rafael A. Irizarry is a biostatistician working on genomic data methods, chair of Data Science at Dana-Farber and a Harvard professor, co-founder of Bioconductor and creator of the RMA microarray method.
Rafael L. Bras
Rafael L. Bras is a Puerto Rico-born hydrologist and hydroclimatologist who taught at MIT for 32 years, then served as dean at UC Irvine and provost of Georgia Tech.
Rafael Luque
Rafael Luque is a Spanish chemist in green chemistry and catalysis, known for converting biomass and waste into fuels, chemicals, and materials; he was suspended by the Universidad de Córdoba in 2022.
Rafael Sorkin
Rafael Dolnick Sorkin (1945–2026) was an American theoretical physicist who co-founded the causal set approach to quantum gravity, originated entanglement entropy, and co-discovered the Kaluza-Klein monopole.
Rafal E. Dunin‐Borkowski
Rafal E. Dunin-Borkowski is an electron microscopist who has directed the Ernst Ruska-Centre and PGI-5 at Forschungszentrum Jülich since 2011, known for electron holography of magnetic fields and the 2023 hopfion rings paper.
Rafal Klajn
Rafał Klajn is a Polish-born supramolecular chemist known for light-controlled self-assembly of nanoparticles and reactions in confined spaces; he won the 2021 Blavatnik Award in Israel.
Raffaella Buonsanti
Raffaella Buonsanti is an Italian chemist and full professor at EPFL, where she heads the Laboratory of Nanochemistry for Energy and is known for colloidal nanocrystal electrocatalysts for CO2 reduction.
Raffinose
Raffinose, also known as gossypose or melitose, is a trisaccharide of galactose, glucose, and fructose found in legume seeds and cottonseed meal, causing flatulence because humans cannot digest it.
Rafi Bistritzer
Rafi Bistritzer, born 1974, is an Israeli condensed matter physicist who co-predicted magic-angle twisted bilayer graphene in 2011, founding twistronics, and won the 2020 Wolf Prize.
Raghunath Anant Mashelkar (रघुनाथ अनंत माशेलकर)
Raghunath Anant Mashelkar, also known as R A Mashelkar, is an Indian chemical engineer known for polymer research who led CSIR from 1995 to 2006.
Ragon Institute
The Ragon Institute of Mass General Brigham, MIT, and Harvard is a nonprofit immunology research institute in Cambridge, Massachusetts, founded in 2009, focused on HIV/AIDS, tuberculosis, and cancer.
Rahu
Rahu (Sanskrit राहु) is one of the nine navagraha of Hindu tradition, a shadow planet identified with the Moon's ascending node and with the severed head of the asura Svarbhanu.
Rahul Banerjee (chemist)
Rahul Banerjee is an Indian chemist, professor at IISER Kolkata since 2021, who works on metal-organic and covalent organic frameworks and won the 2018 Shanti Swarup Bhatnagar Prize.
Rahul Ramachandran
Rahul Ramachandran is an Earth science informatics researcher and Senior Research Scientist at NASA's Marshall Space Flight Center who received the 2009 Presidential Early Career Award.
Rain
Rain, also called a rain storm, is precipitation in which liquid water drops larger than 0.5 mm fall from a cloud; smaller, closely spaced drops are drizzle.
Rain gauge
A rain gauge is an instrument that measures rainfall by collecting water over a known area and reporting it as depth, serving as the reference for calibrating radar and satellite estimates.
Rain of animals
A rain of animals, also called raining animals, is a reported weather event where fish or frogs fall from the sky, explained by tornadoes and waterspouts.
Rain shadow
A rain shadow, also called the rain shadow effect, is a region of reduced precipitation on the lee side of a mountain, where descending air warms and dries.
Rainband
A rainband, also called a spiral band, is a curved band of clouds and thunderstorms spiraling outward from a tropical cyclone's eyewall, producing heavy rain, wind, and tornadoes.
Rainbow
A rainbow is an optical phenomenon in which sunlight refracted, reflected, and dispersed inside water drops forms a colored arc of about 42° radius centered opposite the Sun, red outermost.
Rainer Berger
Rainer Berger (1930–2003) was an Austrian-born American geochemist who spent his UCLA career, 1963 to 1994, developing radiocarbon dating of bone and shell from their organic components.
Rainer Blatt
Rainer Blatt, born 1952, is a German-Austrian experimental physicist whose Innsbruck team first teleported an atom's quantum state and created a quantum byte of entangled atoms.
Rainer Haag
Rainer Haag, born 1968, is a German organic and macromolecular chemist, chair professor at Freie Universität Berlin since 2004, known for dendritic polyglycerol-based antiviral nanoinhibitors and multivalency research.
Rainer Herges
Rainer Herges (born 1955 in St. Ingbert) is a German organic chemist and professor at Kiel University, known for computer-aided reaction planning and the first stable Möbius aromatic hydrocarbon.
Rainer Hillenbrand
Rainer Hillenbrand is a German physicist working in nanooptics who co-developed s-SNOM and nano-FTIR, leads the Nanooptics Group at CIC nanoGUNE in San Sebastián, Spain, and co-founded Neaspec GmbH.