42,772 articles
R. Thomas Weitz
Ralf Thomas Weitz is a solid-state physicist and full professor at the University of Göttingen since 2020, known for the quantum anomalous Hall effect in bilayer graphene.
R.K. O’Nions
Sir Keith O'Nions is a British isotope geochemist, elected to the Royal Society in 1983 and knighted in 1999, known for work on the Earth's mantle and heat budget.
R/V Falkor
R/V Falkor was an 82.9-meter oceanographic research vessel operated by the Schmidt Ocean Institute from 2012 to 2022, converted from a German fisheries protection vessel and donated to Italy in 2022.
R/V Kaimei
R/V Kaimei (かいめい) is a Japanese seafloor wide-area research vessel built in 2016 and operated by JAMSTEC for broad, integrated surveys of the seafloor and strata beneath it.
R/V Meteor
R/V Meteor is a German multidisciplinary ocean research vessel, the third of three ships named Meteor, built in 1986 and owned by the Federal Republic of Germany.
R/V Mirai
R/V Mirai (みらい, "future") was a Japanese oceanographic research vessel of JAMSTEC, converted from the nuclear ship Mutsu, which completed 268 voyages from 1997 until retirement in 2025.
R/V Neil Armstrong
R/V Neil Armstrong (AGOR-27) is an American Ocean Class research vessel owned by the US Navy and operated by Woods Hole Oceanographic Institution from Woods Hole, Massachusetts.
R/V Polarstern
R/V Polarstern is a German research icebreaker operated by the Alfred Wegener Institute from Bremerhaven since 1982, working alternately in the Antarctic and Arctic and best known for the MOSAiC drift expedition.
R/V Roger Revelle
R/V Roger Revelle is a Global Class oceanographic research vessel owned by the U.S. Navy and operated by Scripps Institution of Oceanography, delivered in 1996 and named for the former Scripps director Roger Revelle.
R/V Sally Ride
R/V Sally Ride is a Navy-owned oceanographic research ship operated by Scripps Institution of Oceanography, delivered in 2016 and named for the first American woman in space.
R/V Sikuliaq
R/V Sikuliaq is a 261-foot, global-class oceanographic research vessel owned by the National Science Foundation and operated by the University of Alaska Fairbanks from Seward.
R136
R136 is the dense young star cluster at the core of the Tarantula Nebula in the Large Magellanic Cloud, home to several of the most massive stars known.
R136a1
R136a1 is a Wolf–Rayet star at the center of the R136 cluster in the Tarantula Nebula, the most massive star currently known at roughly 170 to 230 solar masses.
r²SCAN
r²SCAN (regularized–restored strongly constrained and appropriately normed) is a meta-GGA exchange-correlation functional for density functional theory, introduced in 2020 to fix SCAN's numerical instabilities while keeping its accuracy.
r²SCAN-3c
r²SCAN-3c is a composite density-functional theory method for electronic-structure calculations, introduced in 2021 by Stefan Grimme and co-workers at the University of Bonn, combining the r²SCAN functional with dispersion and basis-set corrections.
R3B
R3B (Reactions with Relativistic Radioactive Beams) is an international nuclear physics experiment at FAIR in Darmstadt, Germany, performing kinematically complete studies of exotic nuclei with radioactive beams.
RABBITT
RABBITT (Reconstruction of Attosecond Beating By Interference of Two-photon Transitions) is an interferometric technique in attosecond science that measures harmonic phases in attosecond pulse trains.
Rabi frequency
The Rabi frequency is the angular frequency at which a driven two-level quantum system, such as an atom or spin, oscillates between its two states.
Rabi model
The Rabi model describes the simplest interaction between a two-level atom and a light field, introduced by I. I. Rabi in 1936 and fundamental to quantum optics.
Rabi oscillations
Rabi oscillations are the coherent cyclic transfer of population between two quantum states driven by a periodic field near resonance, first analyzed by Isidor Rabi in 1936–1937.
Rabindra N. Mohapatra
Rabindra N. Mohapatra is a theoretical particle physicist and Distinguished University Professor Emeritus at the University of Maryland, a proponent of the seesaw mechanism for neutrino masses.
Race to Zero
Race to Zero was a United Nations-backed campaign, launched in 2020, rallying businesses, cities, investors, and institutions to halve emissions by 2030 and reach net zero by 2050.
Racemic crystallography
Racemic crystallography is a method of protein X-ray crystallography in which a protein and its chemically synthesized mirror image crystallize together, improving crystallization success and simplifying phasing.
Racemic mixture
A racemic mixture, or racemate, is an equimolar mixture of two mirror-image enantiomers whose opposite rotations of polarized light cancel, making it optically inactive; Louis Pasteur achieved the first resolution in the 1850s.
Racemization
Racemization is the conversion of a chiral substance into a racemate, an equimolar, optically inactive mixture of its two enantiomers; the reverse process is deracemization.
Rachel A. Segalman
Rachel A. Segalman is an American polymer chemist and chemical engineer, Vice Chancellor for Research at UC Santa Barbara since 2025, known for block copolymer self-assembly and polymer thermoelectrics.
Rachel Pike
Rachel Pike is an atmospheric chemist who earned a PhD at Cambridge in 2010, studied isoprene emissions from biofuel crops, and gave a TED talk.
Rachel Somerville
Rachel Somerville is an astrophysicist working on galaxy formation and cosmology who leads the Galaxy Formation group at the Flatiron Institute's Center for Computational Astrophysics.
Rachid Yazami
Rachid Yazami is a Moroccan electrochemist known for demonstrating reversible lithium intercalation in graphite, the anode of the modern lithium-ion battery, and for battery diagnostics.
Raclopride
Raclopride is a substituted benzamide acting as a potent, selective dopamine D2 receptor antagonist, best known as the carbon-11 PET tracer for imaging striatal D2 receptors.