|
Ian Witten
Ian Hugh Witten (4 March 1947 – 5 May 2023) was a computer scientist at the University of Waikato, New Zealand. He was a Chartered Engineer with the Institute of Electrical Engineers. Early life and education Witten was born in Horsham, Sussex, England, on 4 March 1947. He graduated from the University of Cambridge with a BA and MA (First Class Honours) in mathematics in 1969 and a Master of Science degree in mathematics and computer science from the University of Calgary, where he was a Commonwealth Scholar, in 1970. He received his PhD in 1976 from the University of Essex. In 1971, Witten married Pamela Foden at the Chapel of Gonville and Caius College, Cambridge. The couple went on to have two daughters. Career and research Witten discovered temporal-difference learning, inventing the tabular TD(0), the first temporal-difference learning rule for reinforcement learning. Witten was a co-creator of the Sequitur algorithm and conceived and obtained funding for the develop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horsham
Horsham () is a market town on the upper reaches of the River Arun on the fringe of the Weald in West Sussex, England. The town is south south-west of London, north-west of Brighton and north-east of the county town of Chichester. Nearby towns include Crawley to the north-east and Haywards Heath and Burgess Hill to the south-east. It is the administrative centre of the Horsham (district), Horsham district. History Governance There are two main tiers of local government covering Horsham, at non-metropolitan district, district and non-metropolitan county, county level: Horsham District Council and West Sussex County Council. Much of the built-up area of Horsham is an unparished area, but some of the suburbs are included in civil parishes, notably North Horsham. The town is the centre of the Horsham (UK Parliament constituency), parliamentary constituency of Horsham, re-created in 1983. Jeremy Quin had served as Conservative Member of Parliament for Horsham since 2015, succ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Institute Of Electrical Engineers
The Institution of Electrical Engineers (IEE) was a British professional organisation of electronics, electrical, manufacturing, and information technology professionals, especially electrical engineers. It began in 1871 as the Society of Telegraph Engineers. In 2006, it merged with the Institution of Incorporated Engineers and the new organisation is Institution of Engineering and Technology (IET). Notable past presidents have included Lord Kelvin (1889), Sir Joseph Swan (1898) and Sebastian de Ferranti (1910–11). Notable chairmen include John M. M. Munro (1910–11). History The IEE was founded in 1871 as the Society of Telegraph Engineers, changed its name in 1880 to the Society of Telegraph Engineers and Electricians and changed to the Institution of Electrical Engineers in 1888. It was Incorporated by a Royal Charter in 1921. In 1988 the Institution of Electrical Engineers (IEE) merged with the Institution of Electronic and Radio Engineers (IERE), originally th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Society Of New Zealand
Royal may refer to: People * Royal (name), a list of people with either the surname or given name * A member of a royal family or royalty Places United States * Royal, Arkansas, an unincorporated community * Royal, Illinois, a village * Royal, Iowa, a city * Royal, Missouri, an unincorporated community * Royal, Nebraska, a village * Royal, Franklin County, North Carolina, an unincorporated area * Royal, Utah, a ghost town * Royal, West Virginia, an unincorporated community * Royal Gorge, on the Arkansas River in Colorado * Royal Township (other) Elsewhere * Mount Royal, a hill in Montreal, Canada * Royal Canal, Dublin, Ireland * Royal National Park, New South Wales, Australia Arts, entertainment, and media * ''Royal'' (Jesse Royal album), 2021 * Royal (Ayo album), 2020 * ''The Royal'', a British medical drama television series * '' The Royal Magazine'', a monthly British literary magazine published between 1898 and 1939 * '' The Raja Saab'', working title ''Ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fellow
A fellow is a title and form of address for distinguished, learned, or skilled individuals in academia, medicine, research, and industry. The exact meaning of the term differs in each field. In learned society, learned or professional society, professional societies, the term refers to a privileged member who is specially elected in recognition of their work and achievements. Within institutions of higher education, a fellow is a member of a highly ranked group of teachers at a particular college or university or a member of the governing body in some universities. It can also be a specially selected postgraduate student who has been appointed to a post (called a fellowship) granting a stipend, research facilities and other privileges for a fixed period (usually one year or more) in order to undertake some advanced study or research, often in return for teaching services. In the context of medical education in North America, a fellow is a physician who is undergoing a supervised, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenstone (software)
Greenstone is a suite of software tools for building and distributing digital library collections on the Internet or CD-ROM. It is open-source, multilingual software, issued under the terms of the GNU General Public License. Greenstone is produced by the New Zealand Digital Library Project at the University of Waikato, and has been developed and distributed in cooperation with UNESCO and the Human Info NGO in Belgium. The developers of Greenstone received the International Federation for Information Processing The International Federation for Information Processing (IFIP) is a global organisation for researchers and professionals working in the field of computing to conduct research, develop standards and promote information sharing. Established in 19 ...'s 2004 Namur Award for "contributions to the awareness of social implications of information technology, and the need for an holistic approach in the use of information technology that takes account of social implications ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timothy C
Timothy is a masculine name. It comes from the Greek language, Greek name (Timotheus (other), Timόtheos) meaning "honouring God", "in God's honour", or "honoured by God". Timothy (and its variations) is a common name in several countries. People Given name * Timothy (given name), including a list of people with the name * Tim (given name) * Timmy * Timo * Timotheus * Timothée * Timoteo (given name) Surname * Bankole Timothy (1923–1994), Sierra Leonean journalist * Christopher Timothy (born 1940), Welsh actor * Miriam Timothy (1879–1950), British harpist * Nick Timothy (born 1980), British political adviser Mononym * Saint Timothy, a companion and co-worker of Paul the Apostle * Timothy I (Nestorian patriarch) Education * Timothy Christian School (Illinois), a school system in Elmhurst, Illinois * Timothy Christian School (New Jersey), a school in Piscataway, New Jersey Arts and entertainment * Timothy (song), "Timothy" (song), a 1970 song by The Buoys * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alistair Moffat
Alistair Murray Moffat (born 16 June 1950, Kelso, Scotland) is a Scottish writer and journalist, former director of the Edinburgh Festival Fringe, and former Rector of the University of St Andrews. Education Moffat graduated from the University of St Andrews in 1972 with an honours degree in medieval history. He also attended the University of Edinburgh and the University of London, where he earned a Master of Philosophy degree in 1975. Moffat was also active in student politics throughout his time at St Andrews, playing a leading role in the rectorial campaign of John Cleese, who went on to become one of St Andrews' best loved rectors. At Edinburgh Moffat continued his involvement in student politics, campaigning with Gordon Brown, the second student elected rector of the University of Edinburgh. Moffat and Brown went on to campaign on a number of social and political issues including gay rights and the 1979 Edinburgh South by-election. Career Edinburgh Festival Fringe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Mining
Data mining is the process of extracting and finding patterns in massive data sets involving methods at the intersection of machine learning, statistics, and database systems. Data mining is an interdisciplinary subfield of computer science and statistics with an overall goal of extracting information (with intelligent methods) from a data set and transforming the information into a comprehensible structure for further use. Data mining is the analysis step of the " knowledge discovery in databases" process, or KDD. Aside from the raw analysis step, it also involves database and data management aspects, data pre-processing, model and inference considerations, interestingness metrics, complexity considerations, post-processing of discovered structures, visualization, and online updating. The term "data mining" is a misnomer because the goal is the extraction of patterns and knowledge from large amounts of data, not the extraction (''mining'') of data itself. It also is a buzzwo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sequitur Algorithm
Sequitur (or Nevill-Manning–Witten algorithm) is a recursive algorithm developed by Craig Nevill-Manning and Ian H. Witten in 1997 that infers a hierarchical structure (context-free grammar) from a sequence of discrete symbols. The algorithm operates in linear space and time. It can be used in data compression software applications. Constraints The sequitur algorithm constructs a grammar by substituting repeating phrases in the given sequence with new rules and therefore produces a concise representation of the sequence. For example, if the sequence is : S→abcab, the algorithm will produce : S→AcA, A→ab. While scanning the input sequence, the algorithm follows two constraints for generating its grammar efficiently: digram uniqueness and rule utility. Digram uniqueness Whenever a new symbol is scanned from the sequence, it is appended with the last scanned symbol to form a new digram. If this digram has been formed earlier then a new rule is made to replace both occurr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reinforcement Learning
Reinforcement learning (RL) is an interdisciplinary area of machine learning and optimal control concerned with how an intelligent agent should take actions in a dynamic environment in order to maximize a reward signal. Reinforcement learning is one of the three basic machine learning paradigms, alongside supervised learning and unsupervised learning. Reinforcement learning differs from supervised learning in not needing labelled input-output pairs to be presented, and in not needing sub-optimal actions to be explicitly corrected. Instead, the focus is on finding a balance between exploration (of uncharted territory) and exploitation (of current knowledge) with the goal of maximizing the cumulative reward (the feedback of which might be incomplete or delayed). The search for this balance is known as the exploration–exploitation dilemma. The environment is typically stated in the form of a Markov decision process (MDP), as many reinforcement learning algorithms use dyn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temporal-difference Learning
Temporal difference (TD) learning refers to a class of model-free reinforcement learning methods which learn by bootstrapping from the current estimate of the value function. These methods sample from the environment, like Monte Carlo methods, and perform updates based on current estimates, like dynamic programming methods. While Monte Carlo methods only adjust their estimates once the final outcome is known, TD methods adjust predictions to match later, more accurate, predictions about the future before the final outcome is known. This is a form of bootstrapping, as illustrated with the following example: Suppose you wish to predict the weather for Saturday, and you have some model that predicts Saturday's weather, given the weather of each day in the week. In the standard case, you would wait until Saturday and then adjust all your models. However, when it is, for example, Friday, you should have a pretty good idea of what the weather would be on Saturday – and thus be able ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonville And Caius College
Gonville and Caius College, commonly known as Caius ( ), is a constituent college of the University of Cambridge in Cambridge, England. Founded in 1348 by Edmund Gonville, it is the fourth-oldest of the University of Cambridge's 31 colleges and one of the wealthiest. In 1557, it was refounded by John Caius, an alumnus and English physician. The college has been attended by many students who have gone on to significant accomplishment, including fifteen Nobel Prize winners, the second-largest number of any Oxbridge college. Several streets in the city, including Harvey Road, Glisson Road, and Gresham Road, are named after Gonville and Caius alumni. The college and its masters have been influential in the development of the university, including in the founding of other colleges, including Trinity Hall and Darwin College and providing land on Sidgwick Site on which the Faculty of Law was built. History The college was founded in 1348 as Gonville Hall by Edmund Gonville ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
