All articles starting with K
16,083 articles
K-ballad
K-ballad, known in South Korea simply as ballad (발라드), is a style of Korean popular music reshaping soul and R&B to Korean sentiment, popular since the 1980s.
K-best detection
K-best detection is a breadth-first tree-search algorithm for MIMO signal detection that keeps K candidate paths at each tree level, giving SNR-independent complexity while approaching maximum-likelihood performance.
K-CADASIL study
K-CADASIL (NCT07497867) is a 10-year, multicenter prospective observational cohort of about 500 Korean CADASIL patients led by Jeju National University Hospital, tracking stroke, dementia, MRI small vessel disease burden, and NOTCH3 genetics from 2023 to 2040.
K-Ci & JoJo
K-Ci & JoJo: American R&B duo of brothers Cedric "K-Ci" and Joel "JoJo" Hailey from North Carolina, formerly of Jodeci; debut album Love Always (1997) and the chart-topping ballad "All My Life" (1998).
K-City
K-City is South Korea's national full-scale test city for autonomous vehicles, opened in 2018 inside the KATRI driving test ground in Hwaseong, where self-driving technology is tested and certified.
K-class blimp
The K-class blimp, designated ZNP-K, was a class of non-rigid airships built by Goodyear for the United States Navy for anti-submarine patrol during World War II.
K-d tree
A k-d tree is a binary search tree that organizes points in a k-dimensional space, developed by Jon Louis Bentley in 1975 for associative searches.
K-Electric
K-Electric, founded in 1913 as the Karachi Electric Supply Corporation and privatized in 2005, is Pakistan's only vertically integrated electric utility, serving Karachi and adjoining areas of Sindh and Balochistan.
K-epsilon turbulence model
The k-epsilon (k-ε) model is a two-equation turbulence closure for RANS computational fluid dynamics, formulated by Launder and Spalding in 1974 and widely used in industry.
K-essence
K-essence is a class of dark energy models where a scalar field with non-canonical kinetic terms, not just its potential, drives the universe's late-time accelerated expansion.
K-fold cross-validation
K-fold cross-validation is a machine learning method that estimates prediction error by splitting data into k folds, training on all but one, and averaging the k test errors.
K-hole
K-hole (k-hole): slang for the intense dissociative state from high-dose ketamine, involving detachment from body and time, hallucinations, and temporary paralysis; achieved above roughly 150 mg or by injection, with risks of cystitis and dependence.
K-index (meteorology)
The K-index (KI) is a meteorological measure of an air mass's thunderstorm potential, computed from temperature and dew point at 850, 700, and 500 hPa of a sounding.
K-indie
K-indie, also called Korean indie, is the independent popular-music scene of South Korea, anchored in Seoul's Hongdae district since the 1990s, with a 2000s surge and growing global streaming.
k-induction
k-induction is a proof technique that verifies safety properties of transition systems by checking that the property holds in the first k states of every execution.
K-Lite Codec Pack
The K-Lite Codec Pack is a collection of DirectShow filters, codecs, and tools for Windows, distributed in four variants from Basic to Mega since 2003.
K-Love
K-LOVE, also known as Positive Encouraging K-LOVE, is a listener-supported American contemporary Christian music radio network reaching more than 14 million weekly listeners across all 50 states.
K-means clustering
K-means clustering is an unsupervised learning method that partitions data into k clusters by minimizing squared distances to nearest centers, typically using Lloyd's algorithm with k-means++ initialization.
K-medoids
K-medoids is a partitioning clustering method in which each cluster is represented by a medoid, an actual observed data point, making it more robust to noise and outliers than k-means.
K-Meleon
K-Meleon is a free, open-source web browser for Microsoft Windows that renders pages with Mozilla's Gecko engine through a native Windows interface, first released in 2000.
K-nearest neighbors algorithm
The k-nearest neighbors algorithm (k-NN) is a supervised machine learning method that classifies a point by majority vote among its k closest labeled training samples.
k-omega model
The k-omega model is a two-equation turbulence model that solves transport equations for turbulence kinetic energy and specific dissipation rate; its best-known variant is Menter's 1994 SST model.
K-On!
K-On! (けいおん!) is Kakifly's four-panel manga about a high school light music club, serialized in Manga Time Kirara from 2007, adapted by Kyoto Animation into a 2009 anime whose second season, film, and soundtrack made it a defining slice-of-life series.
K-On! (けいおん！) (TV series)
K-On! (けいおん！) is a 2009 Kyoto Animation TV anime adapted from Kakifly's four-panel manga, directed by Naoko Yamada, about high school girls in a Light Music Club band; 13 episodes, a 2010 second season, and a 2011 film.
K-PAX (film)
K-PAX is a 2001 American mystery-drama film directed by Iain Softley, starring Kevin Spacey as a patient claiming to be an alien and Jeff Bridges as his psychiatrist.
K-pop (케이팝)
K-pop (케이팝) is South Korean popular music built on an idol trainee system and five-phase agency production model (SM, YG, JYP, HYBE). Key facts: 1992 Seo Taiji and Boys origins, ~180 million Hallyu fans by 2024, seven of IFPI's 2025 top-10 albums, and China's 2016 entertainment ban.
K-pop Star
K-pop Star (Survival Audition K-pop Star, 서바이벌 오디션 K팝스타) was SBS's 2011–2017 Korean music audition show judged by YG, JYP, and Antenna heads, producing Jamie, Lee Hi, and Boyfriend.
K-Pops!
K-Pops! is Anderson .Paak's 2024 comedy-drama directorial debut, starring him and his real son Soul Rasheed as a drummer who joins a Seoul K-pop competition show and finds his long-lost son; premiered at TIFF 2024, on Netflix May 30, 2026.
K-Ramp
K-Ramp is a 2025 Telugu romantic comedy directed by debutant Jains Nani, starring Kiran Abbavaram and Yukti Thareja. Released 18 October 2025 for Diwali, it earned ₹24.71 crore worldwide and drew mixed reviews.
K-ration
The K-ration was a lightweight United States Army combat ration used in World War II, developed by Ancel Keys and issued as three sealed meal units daily.