All articles starting with S
44,216 articles
Stimming
Stimming, short for self-stimulatory behavior, means repeated movements or sounds such as hand flapping, rocking, or hair twirling used for self-regulation. Common in autism and ADHD but practiced by most people; usually harmless, with support needed mainly for self-injurious stims.
Stimpmeter
Stimpmeter: USGA device, based on Edward Stimpson's 1930s design, that measures putting green speed as the average distance in feet a ball rolls after release; 8 slow, 12 fast.
Stimulant
Stimulants, also known as psychostimulants, are drugs that boost brain chemicals to increase alertness, attention, and energy, ranging from caffeine to prescription drugs that treat ADHD and narcolepsy.
Stimulant psychosis
Stimulant psychosis: drug-induced delusions and hallucinations from amphetamine, methamphetamine, cocaine, or prescription stimulants; affects 36.5% of methamphetamine users versus 0.2% of therapeutic users; usually transient, 19–33% transition to primary psychosis.
Stimulated emission
Stimulated emission of radiation is the process in which an incoming photon of matching energy makes an excited atom release a second identical photon, amplifying light.
Stimulated emission depletion
Stimulated emission depletion (STED) is a fluorescence microscopy technique that uses a donut-shaped depletion beam to shrink resolution below the diffraction limit, reaching tens of nanometers.
Stimulated Raman adiabatic passage
Stimulated Raman adiabatic passage (STIRAP) is a quantum-optical technique, introduced in 1990, that transfers population between two quantum states via an intermediate state that is never populated, avoiding spontaneous-emission loss.
Stimulated Raman scattering
Stimulated Raman scattering (SRS) is a nonlinear optical imaging technique that maps chemical bonds in cells and tissues using two synchronized laser beams, without labels.
Stimulated Raman scattering histology
Stimulated Raman scattering histology (SRH) is a label-free optical imaging method producing histology-like images of unprocessed surgical tissue, developed for brain tumor diagnosis in the operating room.
Stimulated Raman scattering microscopy
Stimulated Raman scattering microscopy (SRS microscopy) is a label-free optical imaging technique in which two laser beams coherently drive molecular vibrations to map a sample's chemistry, introduced for biology in 2008.
Stimulated Raman spectroscopy
Stimulated Raman spectroscopy, also called stimulated Raman scattering spectroscopy, is a nonlinear optical technique that drives molecular vibrations with two synchronized laser beams, enabling fast, sensitive, label-free chemical imaging.
Stimulated recall
Stimulated recall (SR) is a qualitative research method in which participants review a recording of their past behavior and are interviewed about their thoughts at the time.
Stimuli-responsive hydrogel
A stimuli-responsive hydrogel is a water-swollen polymer network that predictably changes swelling, shape, or chemical properties when triggered by stimuli like temperature, pH, or light.
Stimuli-responsive nanoparticles
Stimuli-responsive nanoparticles are drug-delivery particles that release cargo in response to triggers like pH, redox state, enzymes, light, ultrasound, or heat, aiming to boost efficacy and cut toxicity.
Stimulus (physiology)
Stimulus (physiology): a detectable environmental or internal change (light, sound, chemical, temperature, pressure) that activates sensory receptors. Key facts: transduction into graded receptor potentials, coding of modality, location, intensity, duration, and receptor adaptation.
Stimulus control
Stimulus control is a behavioral technique in which environmental cues are arranged so a desired behavior occurs reliably, central to behavior therapy, applied behavior analysis, and insomnia treatment.
Stina Blackstenius
Stina Blackstenius (Emma Stina Blackstenius), Swedish forward born 1996 in Vadstena; Arsenal striker since 2022, 64 goals in 152 games, 2025 Champions League final winner; Sweden captain with Olympic silver and World Cup bronze medals.
Stina Ehrensvärd
Stina Ehrensvärd is a Swedish entrepreneur who co-founded Yubico in Stockholm in 2007, co-invented the YubiKey, and led the company as chief executive for sixteen years.
Stina Nilsson
Stina Nilsson (born 1993, Malung, Sweden) is a Swedish cross-country skier, 2018 Olympic sprint champion, who switched to biathlon 2020–2024 and then to long-distance Ski Classics with Team Ragde Charge, winning Vasaloppet 2025.
Stina Nordenstam
Stina Nordenstam, Swedish singer-songwriter born 1969 in Stockholm; ethereal whisper-fronted albums from Memories of a Color (1991) to The World Is Saved (2004); Sonic's best Swedish album; Hall of Fame 2014.
Stine Bosse
Stine Bosse, born 1960, is a Danish Moderates politician and Member of the European Parliament since 2024, serving as Vice-Chair of its Public Health Committee.
Stine Bredal Oftedal
Stine Bredal Oftedal, born 1991 in Oslo, is a Norwegian handball center back who captained Norway to Olympic gold at Paris 2024, after bronzes in 2016 and 2020.
Stine Lise Hattestad
Stine Lise Hattestad (Hattestad Bratsberg), Norwegian freestyle skier born 1966 in Oslo; Olympic moguls gold at Lillehammer 1994, bronze at Albertville 1992, 1993 world champion, moguls World Cup winner 1988 and 1993; later ESG consultant.
Stine Skogrand
Stine Ruscetta Skogrand (born 1993, Bergen) is a Norwegian right back and captain of Ikast Håndbold; Olympic gold 2024 and bronze 2020, World Championship gold 2015, EHF EURO titles 2016, 2020, 2022.
Stinespring dilation theorem
The Stinespring dilation theorem, proved by W. Forrest Stinespring in 1955, states that every completely positive map is a compression of a -homomorphism on a larger Hilbert space.
Sting
Sting (Gordon Matthew Thomas Sumner, born 1951, Wallsend, England), English musician, singer-songwriter, and actor; frontman and bassist of The Police (1976–1983), solo artist from 1985, over 100 million records sold, Rock and Roll Hall of Fame inductee, and star of David Lynch's Dune (1984).
Sting (drone)
Sting (STING) is a Ukrainian FPV interceptor drone made by Wild Hornets, designed to ram and destroy Russian Shahed attack drones, with over 3,000 downed since June 2025.
Sting (film)
Sting (2024) is an Australian creature-feature horror film written and directed by Kiah Roache-Turner, in which 12-year-old Charlotte's alien pet spider grows into a giant man-eater in a Brooklyn apartment building; released April 12, 2024, with Weta Workshop practical effects.
Sting (musician)
Sting (Gordon Sumner, b. 1951, Wallsend) is the English singer-bassist who fronted The Police (1977–84), then built a jazz-inflected solo career, winning 17 Grammys, selling over 100 million records, and co-founding the Rainforest Fund.
Sting (wrestler)
Sting (Steve Borden), American professional wrestler, NWA debut 1987, "The Franchise of WCW," six WCW World Titles, Crow persona from 1996, 2016 WWE Hall of Famer, retired undefeated in AEW at Revolution 2024.