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Transposition Driven Scheduling
Transposition driven scheduling (TDS) is a load balancing algorithm for parallel computing. It was developed at the Vrije Universiteit in Amsterdam, The Netherlands as an algorithm to solve puzzles. The algorithm provides near-linear speedup with some problems and scales extremely well. It was published{{cite web, url=https://www.aaai.org/Papers/AAAI/1999/AAAI99-103.pdf , title=Transposition Table Driven Work Scheduling in Distributed Search , author1=John W. Romein , author2=Aske Plaat , author3=Henri E. Bal , author4=Jonathan Schaeffer , format=PS , date=1999-07-18 , url-status=dead , archiveurl=https://web.archive.org/web/20151023001214/http://www.aaai.org/Papers/AAAI/1999/AAAI99-103.pdf , archivedate=October 23, 2015 about by John Romein, Aske Plaat, Henri Bal and Jonathan Schaeffer. Transposition based puzzle solving In a puzzle, all possible plays can be represented in a tree with board positions corresponding to the nodes, moves corresponding to the edges, the initial p ...
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Load Balancing (computing)
In computing, load balancing is the process of distributing a set of tasks over a set of resources (computing units), with the aim of making their overall processing more efficient. Load balancing can optimize response time and avoid unevenly overloading some compute nodes while other compute nodes are left idle. Load balancing is the subject of research in the field of parallel computers. Two main approaches exist: static algorithms, which do not take into account the state of the different machines, and dynamic algorithms, which are usually more general and more efficient but require exchanges of information between the different computing units, at the risk of a loss of efficiency. Problem overview A load-balancing algorithm always tries to answer a specific problem. Among other things, the nature of the tasks, the algorithmic complexity, the hardware architecture on which the algorithms will run as well as required error tolerance, must be taken into account. Therefore com ...
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Parallel Computing
Parallel computing is a type of computing, computation in which many calculations or Process (computing), processes are carried out simultaneously. Large problems can often be divided into smaller ones, which can then be solved at the same time. There are several different forms of parallel computing: Bit-level parallelism, bit-level, Instruction-level parallelism, instruction-level, Data parallelism, data, and task parallelism. Parallelism has long been employed in high-performance computing, but has gained broader interest due to the physical constraints preventing frequency scaling.S.V. Adve ''et al.'' (November 2008)"Parallel Computing Research at Illinois: The UPCRC Agenda" (PDF). Parallel@Illinois, University of Illinois at Urbana-Champaign. "The main techniques for these performance benefits—increased clock frequency and smarter but increasingly complex architectures—are now hitting the so-called power wall. The computer industry has accepted that future performance inc ...
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Vrije Universiteit
The (abbreviated as ''VU Amsterdam'' or simply ''VU'' when in context) is a public research university in Amsterdam, Netherlands, founded in 1880. The VU Amsterdam is one of two large, publicly funded research universities in the city, the other being the University of Amsterdam (UvA). The literal translation of the Dutch name is "Free University". "Free" refers to independence of the university from both the State and the Dutch Reformed Church. Both within and outside the university, the institution is commonly referred to as "the VU". Although founded as a private institution, the VU has received government funding on a parity basis with public universities since 1970. The university is located on a compact urban campus in the southern Buitenveldert neighbourhood of Amsterdam and adjacent to the modern Zuidas business district. As of October 2021, the VU had 29,796 registered students, most of whom were full-time students. That year, the university had 2,263 faculty members ...
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Amsterdam
Amsterdam ( , ; ; ) is the capital of the Netherlands, capital and Municipalities of the Netherlands, largest city of the Kingdom of the Netherlands. It has a population of 933,680 in June 2024 within the city proper, 1,457,018 in the City Region of Amsterdam, urban area and 2,480,394 in the Amsterdam metropolitan area, metropolitan area. Located in the Provinces of the Netherlands, Dutch province of North Holland, Amsterdam is colloquially referred to as the "Venice of the North", for its canals of Amsterdam, large number of canals, now a World Heritage Site, UNESCO World Heritage Site. Amsterdam was founded at the mouth of the Amstel River, which was dammed to control flooding. Originally a small fishing village in the 12th century, Amsterdam became a major world port during the Dutch Golden Age of the 17th century, when the Netherlands was an economic powerhouse. Amsterdam was the leading centre for finance and trade, as well as a hub of secular art production. In the 19th ...
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The Netherlands
, Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Netherlands. The Netherlands consists of Provinces of the Netherlands, twelve provinces; it borders Germany to the east and Belgium to the south, with a North Sea coastline to the north and west. It shares Maritime boundary, maritime borders with the United Kingdom, Germany, and Belgium. The official language is Dutch language, Dutch, with West Frisian language, West Frisian as a secondary official language in the province of Friesland. Dutch, English_language, English, and Papiamento are official in the Caribbean Netherlands, Caribbean territories. The people who are from the Netherlands is often referred to as Dutch people, Dutch Ethnicity, Ethnicity group, not to be confused by the language. ''Netherlands'' literally means "lower countries" i ...
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Puzzle
A puzzle is a game, problem, or toy that tests a person's ingenuity or knowledge. In a puzzle, the solver is expected to put pieces together ( or take them apart) in a logical way, in order to find the solution of the puzzle. There are different genres of puzzles, such as crossword puzzles, word-search puzzles, number puzzles, relational puzzles, and logic puzzles. The academic study of puzzles is called enigmatology. Puzzles are often created to be a form of entertainment but they can also arise from serious mathematical or logical problems. In such cases, their solution may be a significant contribution to mathematical research. Etymology The ''Oxford English Dictionary'' dates the word ''puzzle'' (as a verb) to the 16th century. Its earliest use documented in the ''OED'' was in a book titled ''The Voyage of Robert Dudley...to the West Indies, 1594–95, narrated by Capt. Wyatt, by himself, and by Abram Kendall, master'' (published circa 1595). The word later came to be ...
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John Romein
John is a common English name and surname: * John (given name) * John (surname) John may also refer to: New Testament Works * Gospel of John, a title often shortened to John * First Epistle of John, often shortened to 1 John * Second Epistle of John, often shortened to 2 John * Third Epistle of John, often shortened to 3 John People * John the Baptist (died ), regarded as a prophet and the forerunner of Jesus Christ * John the Apostle (died ), one of the twelve apostles of Jesus Christ * John the Evangelist, assigned author of the Fourth Gospel, once identified with the Apostle * John of Patmos, also known as John the Divine or John the Revelator, the author of the Book of Revelation, once identified with the Apostle * John the Presbyter, a figure either identified with or distinguished from the Apostle, the Evangelist and John of Patmos Other people with the given name Religious figures * John, father of Andrew the Apostle and Saint Peter * Pope John (disambigu ...
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Aske Plaat
Aske or ASKE may refer to: * ''Aske'' (EP), an EP by Burzum * Aske, North Yorkshire, England ** Aske Hall * ASKE, Association for Skeptical Enquiry * Α.Σ.Κ.Ε., Fighting Socialist Party of Greece * Robert Aske (political leader) (1500–1537) * Robert Aske (merchant) (1619–1689) * Aske baronets See also * Ask and Embla In Norse mythology, Ask and Embla ()—man and woman respectively—were the first two humans, created by the gods. The pair are attested in both the ''Poetic Edda'', compiled in the 13th century from earlier traditional sources, and the ''Pros ...
, the first humans in Norse mythology {{disambiguation ...
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Henri Bal
Henri Elle Bal (born 16 April 1958) is a professor of computer science at the Vrije Universiteit, Amsterdam in the Netherlands. He is a well-known researcher in computer systems with a specialization in parallel computer systems, languages, and applications. Education Bal received his engineer's degree from the Delft University of Technology in mathematics cum laude in 1982. Shortly after graduating, he moved to the Vrije Universiteit where he began doing research on optimizing compilers in the Computer Systems group under the direction of Prof. Andrew Tanenbaum. This work was so promising that Tanenbaum encouraged Bal to become a PhD student in his group. Bal's PhD research led to the development of the Orca programming language, one of the first programming languages intended for large-scale cluster computers. Unlike most other parallel programming languages, Orca is based on the shared-data object model, which allows a group of computers to have the illusion that they share da ...
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Jonathan Schaeffer
Jonathan Herbert Schaeffer (born 1957) is a Canadian researcher and professor at the University of Alberta and the former Canada Research Chair in Artificial Intelligence. He led the team that wrote Chinook, the world's strongest American checkers player, after some relatively good results in writing computer chess programs. He is involved in the University of Alberta GAMES group developing computer poker systems. Schaeffer is also a member of the research group that created Polaris, a program designed to play the Texas Hold'em variant of poker. He is a Founder of Onlea, which produces online learning experiences. Early life Born in Toronto, Ontario, he received a Bachelor of Science degree in 1979 from the University of Toronto. He received a Master of Mathematics degree in 1980 and a Ph.D. in 1986 from the University of Waterloo. Schaeffer reached national master strength in chess while in his early 20s, but has played little competitive chess since that time. Draughts: C ...
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Transposition Table
{{no footnotes, date=November 2017 A transposition table is a cache of previously seen positions, and associated evaluations, in a game tree generated by a computer game playing program. If a position recurs via a different sequence of moves, the value of the position is retrieved from the table, avoiding re-searching the game tree below that position. Transposition tables are primarily useful in perfect-information games (where the entire state of the game is known to all players at all times). The usage of transposition tables is essentially memoization applied to the tree search and is a form of dynamic programming. Transposition tables are typically implemented as hash tables encoding the current board position as the hash index. The number of possible positions that may occur in a game tree is an exponential function of depth of search, and can be thousands to millions or even much greater. Transposition tables may therefore consume most of available system memory and a ...
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Communication Overhead
Communication is commonly defined as the transmission of information. Its precise definition is disputed and there are disagreements about whether unintentional or failed transmissions are included and whether communication not only transmits meaning but also creates it. Models of communication are simplified overviews of its main components and their interactions. Many models include the idea that a source uses a coding system to express information in the form of a message. The message is sent through a channel to a receiver who has to decode it to understand it. The main field of inquiry investigating communication is called communication studies. A common way to classify communication is by whether information is exchanged between humans, members of other species, or non-living entities such as computers. For human communication, a central contrast is between verbal and non-verbal communication. Verbal communication involves the exchange of messages in linguistic form, ...
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