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Jyongsik Jang
Jyongsik Jang (Jang Jeong-sik) is a South Korean materials scientist, professor at Seoul National University from 1991 to 2020, known for conducting-polymer nanomaterials and biosensors.
Jyotirmoy Mazumder
Jyotirmoy Mazumder (1951–2021) was an Indian-born American mechanical engineer at the University of Michigan who pioneered laser–materials modeling and invented closed-loop direct metal deposition, a 3D metal printing method.
Jython
Jython is an implementation of the Python programming language written in Java, letting Python code run on the Java Virtual Machine and access Java classes; it currently supports Python 2.7.
K (programming language)
K is an ASCII-based array programming language designed by Arthur Whitney around 1993 as a terse descendant of APL, used to build the kdb+ database.
K band (radio)
K band is a microwave radio band from 18 to 27 GHz, named from the German Kurz for short, and used for police and automotive radar.
K computer
The K computer, named for the Japanese word Kei meaning ten quadrillion, was a Japanese supercomputer built by RIKEN and Fujitsu in Kobe that led the TOP500 list in June 2011 and operated until 2019.
K-10 (rover)
K10, also written K-10, is a prototype planetary rover built by NASA's Ames Research Center in California as a testbed for autonomous lunar site survey and astronaut telerobotics.
K-13 (К-13) (missile)
The K-13 (К-13), NATO name AA-2 Atoll, is a Soviet short-range infrared-homing air-to-air missile reverse engineered from the American AIM-9B Sidewinder and fielded from 1962.
K-25
K-25 was a uranium enrichment plant at Oak Ridge, Tennessee, built for the Manhattan Project from 1943 to 1945, with what was then the largest building in the world.
K-2SO
K-2SO, also known as Kaytoo-Esso, is a fictional droid in the Star Wars franchise, a reprogrammed Imperial security droid serving the Rebel Alliance, first appearing in Rogue One (2016).
K-anonymity
K-anonymity is a privacy criterion for published datasets, introduced by Latanya Sweeney in 2002, requiring every record to be indistinguishable from at least k minus 1 others.
K-Arena Yokohama
K-Arena Yokohama (Ｋアリーナ横浜) is a 20,033-seat indoor music arena in Yokohama, Japan, opened in 2023 in the Minato Mirai 21 district and known for its permanent 200-speaker sound system.
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-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-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-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-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-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.
K-SVD
K-SVD is an iterative dictionary learning algorithm that trains an overcomplete dictionary so signals can be approximated sparsely, introduced by Aharon, Elad, and Bruckstein in 2006.
K-truss
The K-truss is a bridge truss configuration whose web members form a repeated K pattern, a modification of the Parker truss prized for large spans.
K-Way
K-Way is a Franco-Italian clothing brand, created in Paris in 1965 by Léon-Claude Duhamel, known for a waterproof nylon jacket that folds into its own pouch.
K-Y Jelly
K-Y Jelly is an American water-based personal lubricant brand, first sold as a prescription medical product in 1917, over the counter since 1980, and owned since 2014 by Reckitt.
K. D. Tocher
K. D. Tocher (Keith Douglas Tocher) was a British operational research scientist who built the General Simulation Program in 1958 and wrote the first book on computer simulation.
K. Eric Drexler
K. Eric Drexler, also known as Kim Eric Drexler, is an American engineer, born in 1955, who founded molecular nanotechnology; his 1986 book Engines of Creation popularized it.