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All articles starting with R

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Resolve Growth Partners

Resolve Growth Partners is a Baltimore, Maryland-based growth-equity venture capital firm founded in 2018 by Jit Sinha and Chris Rhodes, which invests in early-growth-stage enterprise software companies.

Resolved sideband cooling

Resolved sideband cooling is a laser cooling technique that cools trapped atoms or ions close to the motional ground state by tuning a laser to a red motional sideband.

Resolved-acceleration control

Resolved-acceleration control is a task-space tracking control technique for robot manipulators, introduced by J. Y. S. Luh, M. W. Walker, and R. P. Paul in 1980.

Resolvent (Galois theory)

In Galois theory, a resolvent (Galois resolvent) is an auxiliary equation whose roots let one find the roots of a given equation, an idea Lagrange introduced in 1770.

Resolvent analysis

Resolvent analysis is a linear-operator method in fluid dynamics that computes the dominant amplification mechanisms of coherent structures in wall-bounded turbulence, jets, and other shear flows.

Resolvent operator

The resolvent operator of a linear operator A is the bounded inverse R(λ, A) = (λI − A)⁻¹, defined for λ where the inverse exists; it generalizes matrix invertibility in spectral theory.

Resolver (electrical)

A resolver is an electromagnetic rotary position sensor, resembling a small AC motor, that reports the absolute angle of its shaft from sine and cosine signals.

Resona Holdings

Resona Holdings, also known as りそなホールディングス, is a Japanese bank holding company describing itself as Japan's largest retail commercial banking group, centered on Tokyo and Kansai.

Resonac

Resonac (レゾナック) is a Japanese chemical group formed on January 1, 2023, when Showa Denko and Showa Denko Materials, the former Hitachi Chemical, merged and reorganized into a holding company and a manufacturing company.

Resonance

Resonance, also called resonant frequency, is the tendency of a system to oscillate with larger amplitude when a periodic driving force matches its natural frequency, as in radio tuning and MRI.

Resonance (chemistry)

Resonance in chemistry, also called mesomerism, describes a molecule's electronic structure using two or more Lewis structures, since no single formula, as for benzene, suffices.

Resonance (particle physics)

A resonance in particle physics, also called a particle resonance, is an unstable particle appearing as a scattering-amplitude pole and a cross-section peak, like the Z boson.

Resonance broadening

Resonance broadening, or self-broadening, is the broadening of a spectral line by collisions between identical particles, occurring only for resonance lines connecting to the ground state.

Resonance capture

Resonance capture is the trapping of a celestial body into a mean-motion resonance when slow orbital migration sweeps the resonance past its orbit, explaining Pluto's 3:2 lock with Neptune.

Resonance energy transfer

Förster resonance energy transfer (FRET) is a spectroscopic technique measuring nanometer-scale distances between two fluorophores by nonradiative transfer of excitation energy from donor to acceptor.

Resonance escape probability

Resonance escape probability is the probability that a fission neutron slows down through a fuel's resonance energy region without being captured, denoted p in reactor physics.

Resonance fluorescence

Resonance fluorescence is the light emitted by a two-level quantum emitter, such as an atom or quantum dot, driven by a resonant laser, a cornerstone process of quantum optics.

Resonance frequency analysis

Resonance frequency analysis (RFA) is a noninvasive chairside test that measures a dental implant's vibration to assess stability and osseointegration, reported as an implant stability quotient from 1 to 99.

Resonance ionization mass spectrometry

Resonance ionization mass spectrometry (RIMS) is an analytical technique in which tunable lasers selectively ionize atoms of one element, and a mass spectrometer counts them, enabling ultratrace radionuclide analysis.

Resonance light scattering

Resonance light scattering (RLS) is a solution spectroscopic method measuring strongly enhanced elastic light scattering near absorption bands, used in assays for aggregation of dyes and nanoparticles.

Resonance Raman spectroscopy

Resonance Raman spectroscopy is a form of Raman spectroscopy in which the excitation laser matches an electronic absorption transition, enhancing the chromophore's bands by 10^3 to 10^6.

Resonance Rayleigh scattering spectroscopy

Resonance Rayleigh scattering spectroscopy, also known as resonance light scattering, is an analytical technique whose scattering is enhanced near an absorption wavelength, enabling trace detection.

Resonance-enhanced multiphoton ionization

Resonance-enhanced multiphoton ionization (REMPI) is a laser spectroscopy technique that ionizes atoms or molecules via resonant multiphoton absorption, used as a selective detector of gas-phase species.

Resonance: A Plague Tale Legacy

Resonance: A Plague Tale Legacy is Asobo Studio's 2026 action-adventure prequel to A Plague Tale, starring smuggler Sophia on the Minotaur's Island, released August 27, 2026 on PS5, Xbox Series X|S, and PC, day one on Game Pass, running on the Zouna engine.

Resonant charge transfer

Resonant charge transfer, also called resonant charge exchange, is an ion-atom collision where an electron moves between identical species, A⁺ + A → A + A⁺.

Resonant converter

A resonant converter is a switching power converter in which a resonant tank of inductors and capacitors shapes current so switches turn on at zero voltage or current, raising efficiency.

Resonant current control

Resonant current control is a feedback technique for power converters whose controller contains a resonant element tuned to a chosen frequency, giving very high gain there.

Resonant field amplification

Resonant field amplification (RFA) is a tokamak plasma diagnostic measuring how strongly the plasma amplifies an applied rotating magnetic field, revealing proximity to the resistive wall mode instability.

Resonant inductive coupling

Resonant inductive coupling, also called magnetic resonance coupling, is a wireless power transfer method where coils tuned to the same resonant frequency transfer energy efficiently.

Resonant inelastic X-ray scattering

Resonant inelastic X-ray scattering (RIXS) measures energy and momentum transfer from X rays scattered inelastically at a core absorption edge, probing charge, magnetic, and orbital excitations.