All articles starting with Q
2,252 articles
Q-switching
Q-switching is a laser technique that concentrates stored energy into a single intense nanosecond giant pulse, proposed by Hellwarth in 1961 and used in rangefinders, lidar, and marking.
Q-Tip (musician)
Q-Tip (Jonathan Davis, later Kamaal Ibn John Fareed; born 1970, New York) is the rapper-producer who led A Tribe Called Quest, pioneered jazz-sampled hip-hop in the Native Tongues collective, and later released Amplified and The Renaissance.
q-value (statistics)
John D. Storey introduced the q-value (statistics) in 2002, a measure of significance that defines the minimum false discovery rate at which a test would be called significant.
Q-vector
A Q-vector is a horizontal vector used in quasigeostrophic meteorology whose divergence appears in the omega equation, forcing synoptic-scale vertical velocity; Q-vector convergence implies ascent.
Q–Q plot
A Q–Q plot (quantile–quantile plot) is a statistical graphic comparing two probability distributions by plotting their quantiles against each other; points off the 45-degree reference line reveal differences in location, scale, or tails.
Q: The Winged Serpent
Q: The Winged Serpent (1982) is Larry Cohen's cult monster film in which the Aztec god Quetzalcoatl nests atop New York's Chrysler Building; Michael Moriarty, David Carradine, and Richard Roundtree star, with stop-motion effects by David Allen.
Q. Daniel Wang
Q. Daniel Wang is an astrophysicist and professor of astronomy at the University of Massachusetts Amherst, known for X-ray studies of hot plasma in and around galaxies.
Q. Richard Lu
Q. Richard Lu, also known as Richard Lu, is a researcher in cancer epigenetics known for discovering Olig1 and Olig2 and for work on brain tumors and myelin repair.
Q.ai
Q.ai, officially Q (Cue) Ltd., is an Israeli artificial intelligence startup founded in 2022 in Ramat Gan, acquired by Apple in 2026 for a reported $1.5–2 billion.
Q.ANT
Q.ANT is a Stuttgart-based deep-tech company founded in 2018 by Michael Förtsch as a spin-off from TRUMPF that develops photonic processors for AI and high-performance computing.
Q.E.D.
Q.E.D., short for the Latin quod erat demonstrandum ("which was to be demonstrated"), is written at the end of a mathematical proof to signal completion.
Q'eswachaka Bridge
Q'eswachaka is a rope suspension bridge over the Apurímac River in Cusco, Peru, rebuilt each year with plant fiber using Inca techniques, recognized by UNESCO in 2013.
Q'orianka Kilcher
Q'orianka Kilcher (born 1990) is a German-born American actress and activist of Quechua-Huachipaeri and Swiss-German descent, known for playing Pocahontas in The New World and Angela Blue Thunder on Yellowstone, and for her 2026 likeness lawsuit against James Cameron over Avatar's Neytiri.
Q*bert
Q*bert (also Q-Bert) is a 1982 Gottlieb arcade game designed by Warren Davis: an orange creature hops diagonally across a 28-cube isometric pyramid changing colors while dodging Coily and other enemies, ported widely by Parker Brothers.
Q1 (building)
Q1, short for Queensland Number One, is a 322.5-meter residential skyscraper in Surfers Paradise on Australia's Gold Coast, completed in 2005 and the tallest residential building in the Southern Hemisphere.
Q2 (company)
Q2 Holdings, Inc. is an Austin, Texas-based financial technology company, founded in 2004, selling cloud-based digital banking and lending software to banks and credit unions.
Qa'ani Shirazi
Qa'ani Shirazi (قاآنی شیرازی), pen name of Mirza Habib-Allah Shirazi, was a leading Persian poet of the Qajar era, born in Shiraz in 1808 and poet laureate to Naser al-Din Shah.
Qā’em Shahr
Qā’em Shahr (Persian: قائمشهر), formerly Shahi, is a city in northern Iran's Mazandaran province, capital of Qaem Shahr County, with about 205,000 people in 2016.
Qaanaaq
Qaanaaq, also the current Greenlandic name for Thule, is Greenland's northernmost town, founded in 1953 when 116 Inughuit were relocated from Uummannaq for the Thule Air Base; population 619 (2021), two supply ships yearly.
Qaani
Qaani (قاآنی) was the pen name of Mirzā Ḥabib-Allāh Širāzi, a Persian poet of the Qajar era, born in Shiraz, who died in Rayy in 1854 and led the Literary Return style.
Qaasuitsup
Qaasuitsup Kommunia (Qaasuitsup Kommune) was a former municipality in northwestern Greenland, 2009-2017, the world's largest by area at about 660,000 km², centered on Ilulissat, split in 2018 into Avannaata and Qeqertalik.
Qaboos bin Said (قابوس بن سعيد آل سعيد)
Qaboos bin Said (قابوس بن سعيد آل سعيد), Sultan of Oman 1970–2020, took power from his father in a 1970 British-backed coup, modernized Oman, promulgated its 1996 Basic Statute, and built a neutral, mediation-based foreign policy; died January 2020, succeeded by cousin Haitham bin Tariq.
Qabus ibn al-Mundhir
Qabus ibn al-Mundhir (قابوس بن المنذر) was a king of the Lakhmid dynasty of al-Hira in central Iraq, reigning from 569 to about 574 between his brothers Amr ibn Hind and al-Mundhir IV.
Qabus ibn Vushmgir
Qabus ibn Vushmgir (قابوس بن وشمگیر), titled Shams al-Ma'ali, was the fourth amir of the Ziyarid dynasty, ruling Tabaristan and Gorgan in two reigns from 978 to 1012.
Qabus-nama
The Qabus-nama (قابوسنامه) is a Persian mirror-for-princes, a book of advice for rulers, written in 1082 by the Ziyarid prince Kaykavus for his son Gilanshah.
Qadamgah
Qadamgah (Persian, 'place of the footprints') is an Achaemenid or post-Achaemenid rock-cut monument on Kuh-e Rahmat near Persepolis, Iran, now interpreted as a completed water-cult site, not a tomb.
Qadariyya
Qadariyya (القدرية) was a theological movement of the Umayyad caliphate, active from about 720 to 750, whose teachers, including Ma'bad al-Juhani and Ghaylan al-Dimashqi, taught that humans possess free will.
Qader
Qader, also spelled Ghader, is an Iranian anti-ship cruise missile developed as an improved version of the Chinese C-802, announced in 2011 with a reported range of 200 km.
Qadi
A qadi, also spelled kadi or kazi (Arabic: qāḍī), is the judge of an Islamic court, charged by a ruler to apply and enforce religious law.
Qadi 'Abd Wahhab Tha'labi
Qadi 'Abd al-Wahhab (القاضي عبد الوهاب) was a Maliki jurist and judge of the Iraqi school, born in Baghdad in 973 and died in Cairo in 1031.