All articles starting with R
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Relaxation oscillator
A relaxation oscillator is an electronic oscillator producing non-sinusoidal waveforms such as square, triangular, and sawtooth waves by repeatedly charging and discharging a capacitor between two switching thresholds.
Relaxation test
A relaxation test is a mechanical test that holds a specimen at a fixed strain and measures how the stress needed to hold it decays over time.
Relaxation therapy
Relaxation therapy, also known as relaxation techniques, is a behavioral treatment using progressive muscle relaxation, breathing exercises, and guided imagery to reduce anxiety, stress, and insomnia.
Relaxation time approximation
The relaxation time approximation (RTA) replaces the collision term of the Boltzmann transport equation with a single relaxation time, so a disturbed distribution decays exponentially back to equilibrium.
Relaxin
Relaxin, a peptide hormone of the insulin superfamily discovered in 1926, mediates pregnancy adaptations and has vasodilatory, anti-fibrotic effects; its recombinant form serelaxin failed phase III heart failure trials.
Relaxor ferroelectric
A relaxor ferroelectric is a ferroelectric material with a broad, frequency-dependent permittivity maximum and only nanometer-scale polar order, discovered by G. A. Smolenskii in the late 1950s.
Relay
A relay is an electrically operated switch in which a small current through a coil moves an armature that opens or closes contacts in a separate load circuit.
Relay and team sprint events in cross-country skiing
Relay and team sprint events are the team formats of cross-country skiing, including the 4 × 10 km men's relay, 4 × 5 km women's relay, and team sprint.
Relay beamforming
Relay beamforming is a wireless technique in which multiple relay stations jointly weight and combine signals, acting like a phased antenna array aimed at the destination.
Relay coordination
Relay coordination is the process of choosing protective relay settings and time delays so devices trip in sequence during a fault, isolating the smallest part of the power system.
Relay Investments
Relay Investments is a Boston, Massachusetts investment firm, co-founded in 2013 by Alessandro (Sandro) Mina, that invests exclusively in search funds and the companies they acquire.
Relay race
Relay race: track event where teams of four pass a baton in takeover zones, as in the 4x100m and 4x400m. Exchange technique, checkmarks, free distance, and gain time, not just sprint speed, decide results.
Relay Therapeutics
Relay Therapeutics is a biopharmaceutical company founded in 2016 that uses protein motion to design precision medicines. Its lead candidate, Zovegalisib, is in Phase 3 trials for cancer.
Relayer
Relayer (1974) is Yes' seventh studio album, the only classic-era album with Swiss keyboardist Patrick Moraz after Rick Wakeman's exit, featuring the 21:54 War and Peace-inspired epic The Gates of Delirium, Sound Chaser, and To Be Over.
relayr
relayr was a Berlin-based industrial Internet of Things company founded in 2013, acquired by Munich Re's Hartford Steam Boiler in 2018 and wound down in 2025.
RELB
RELB (RelB, Gene ID 5971, chromosome 19) encodes the NF-κB subunit RelB, the signal transducer of the non-canonical NF-κB pathway as RelB:p52 dimers, regulating lymphoid organogenesis, dendritic cells, and immune tolerance; its loss causes multi-organ inflammation.
RelB antitoxin/Antitoxin DinJ
RelB and DinJ are RelBE-family type II toxin-antitoxin antitoxins of E. coli that neutralize the ribosome-dependent RNase toxins RelE and YafQ, wrap around them via C-terminal helices, and autorepress their operons through RHH DNA-binding domains.
Reldesemtiv
Reldesemtiv (CK-2127107), a second-generation fast skeletal muscle troponin activator by Cytokinetics for ALS and SMA; FORTITUDE-ALS phase 2 and COURAGE-ALS phase 3 both missed endpoints, development discontinued.
Release (Pet Shop Boys album)
Release (2002) is the eighth Pet Shop Boys studio album on Parlophone, a guitar- and piano-driven record with Johnny Marr, UK #7, 800,000 sales, their least commercially successful album, NME called it substandard Oasis.
Release of Nelson Mandela
The release of Nelson Mandela on 11 February 1990 freed the imprisoned ANC leader from Victor Verster Prison near Paarl after 27 years, opening apartheid's negotiated end.
Release paper
Release paper, also called release liner, is paper coated with a thin silicone layer that carries adhesives for labels and tapes, peeling away cleanly at use.
Releasing military power over a cup of wine
Releasing military power over a cup of wine (杯酒释兵权) is a Song dynasty episode in which Emperor Taizu induced his senior commanders to give up their commands at a banquet.
Relebactam anhydrous
Relebactam anhydrous (MK-7655, C12H20N4O6S, 348.38 g/mol) is a diazabicyclooctane beta-lactamase inhibitor inhibiting KPC and AmpC enzymes; combined with imipenem/cilastatin as Recarbrio, FDA-approved July 2019 for gram-negative infections.
Relectiones de Indis
Relectiones de Indis (Relectio de Indis recenter inventis) is a university lecture by Francisco de Vitoria, delivered in 1539, on Spanish titles to the newly found Americas.
Relevance feedback
Relevance feedback is an information retrieval technique in which a search system reformulates a user's query based on documents marked relevant or nonrelevant, introduced by Rocchio in 1971.
Relevance logic
Relevance logic, also known as relevant logic, is a family of non-classical logics developed to avoid the paradoxes of material and strict implication by requiring content connection.
Relevance vector machine
The relevance vector machine (RVM) is a Bayesian kernel method for regression and classification introduced by Michael E. Tipping in 1999, typically far sparser than the support vector machine.
Relevant type theory
Relevant type theory is the substructural type system with exchange and contraction but no weakening, so every variable is used at least once; it corresponds to relevant logic and the λI-calculus.
RELEVENT trial
RELEVENT (NCT03921671) is an Italian single-arm phase II trial of ramucirumab plus carboplatin-paclitaxel as first-line therapy for untreated advanced thymic carcinoma, reporting 80% investigator ORR, 18.1-month median PFS, and 43.8-month median OS in 35 patients.
Reliability (statistics)
Reliability in statistics and psychometrics is the consistency of test scores across replications of a testing procedure, estimated through coefficients such as test-retest, alternate-forms, and internal consistency measures.