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Janus (concurrent Constraint Programming Language)
Janus is a computer programming language partially described by K. Kahn and Vijay A. Saraswat in the paper "Actors as a special case of concurrent constraint (logic) programming" in 1990. It is a concurrent constraint language without backtracking. Janus models concurrency through the use of ''bag channels''. Code that needs to send a message to a process does so by constraining a bag to be the union of another bag and the singleton bag of the message. The other bag is then available to be constrained for sending subsequent messages. The process receives the message by matching the bag to a pattern that says it is the union of some singleton and some other bag. The logic of the bag channels produces a property shared by the actor model, namely that the order of arrival of the messages is not guaranteed. However, unlike actors in the actor model, processes in Janus can pass around their "mailboxes" so to speak, in the form of bags, and can hold more than one. This ability to pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ken Kahn
Ken or KEN may refer to: Entertainment * ''Ken'' (album), a 2017 album by Canadian indie rock band Destroyer. * ''Ken'' (film), 1964 Japanese film. * ''Ken'' (magazine), a large-format political magazine. * Ken Masters, a main character in the ''Street Fighter'' franchise. People * Ken (given name), a list of people named Ken * Ken (musician) (born 1968), guitarist of the Japanese rock band L'Arc-en-Ciel * Ken (SB19 musician) (born 1997), stage name of Felip Jhon Suson of the Filipino boy group, SB19 * Ken (VIXX singer) (born 1992), stage name of Lee Jae-hwan of the South Korean boy group, VIXX * Naoko Ken (born 1953), Japanese singer and actress (Ken as surname) * Thomas Ken (1637–1711), English cleric and composer * Tjungkara Ken (born 1969), Aboriginal Australian artist * Ken Zheng (born April 5, 1995) is an Indonesian actor, screenwriter and martial artist Other * Kèn, a musical instrument from Vietnam. * Ken (doll), a product by Mattel. * ''Ken'' (unit) (間), a Ja ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vijay A
Vijay may refer to: People *Vijay (name) *Vijay (actor) (born 1974), an Indian Tamil actor *Vijay (director), Kannada film director Fiction * ''Vijay'' (1942 film), a 1942 Indian Hindi film * ''Vijay'' (1988 film), a 1988 Indian Hindi film directed by Yash Chopra * ''Vijay'' (1989 film), a 1989 Indian Telugu film directed by B. Gopal * ''Vijay'' (TV series), an NDTV Imagine television series Military operations *Operation Vijay (1961) *Operation Vijay (1999) See also *VJ (other) VJ may refer to Arts and media * Video jockey, a television announcer who introduces and plays videos * VJing, a live visual performance art practice * Vee-Jay Records, an American blues and jazz record label * Video journalism * Video joker, ... * Veejay (other) {{disambiguation, hn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concurrent Constraint Logic Programming
Concurrent constraint logic programming is a version of constraint logic programming aimed primarily at programming concurrent processes rather than (or in addition to) solving constraint satisfaction problems. Goals in constraint logic programming are evaluated concurrently; a concurrent process is therefore programmed as the evaluation of a goal by the interpreter. Syntactically, concurrent constraints logic programs are similar to non-concurrent programs, the only exception being that clauses include guards, which are constraints that may block the applicability of the clause under some conditions. Semantically, concurrent constraint logic programming differs from its non-concurrent versions because a goal evaluation is intended to realize a concurrent process rather than finding a solution to a problem. Most notably, this difference affects how the interpreter behaves when more than one clause is applicable: non-concurrent constraint logic programming recursively tries all claus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Programming Language
A programming language is a system of notation for writing computer programs. Most programming languages are text-based formal languages, but they may also be graphical. They are a kind of computer language. The description of a programming language is usually split into the two components of syntax (form) and semantics (meaning), which are usually defined by a formal language. Some languages are defined by a specification document (for example, the C programming language is specified by an ISO Standard) while other languages (such as Perl) have a dominant implementation that is treated as a reference. Some languages have both, with the basic language defined by a standard and extensions taken from the dominant implementation being common. Programming language theory is the subfield of computer science that studies the design, implementation, analysis, characterization, and classification of programming languages. Definitions There are many considerations when defining wha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Actor Model
The actor model in computer science is a mathematical model of concurrent computation that treats ''actor'' as the universal primitive of concurrent computation. In response to a message it receives, an actor can: make local decisions, create more actors, send more messages, and determine how to respond to the next message received. Actors may modify their own private state, but can only affect each other indirectly through messaging (removing the need for lock-based synchronization). The actor model originated in 1973. It has been used both as a framework for a theoretical understanding of computation and as the theoretical basis for several practical implementations of concurrent systems. The relationship of the model to other work is discussed in actor model and process calculi. History According to Carl Hewitt, unlike previous models of computation, the actor model was inspired by physics, including general relativity and quantum mechanics. It was also influenced by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Janus (mythology)
In ancient Roman religion and myth, Janus ( ; la, Ianvs ) is the god of beginnings, gates, transitions, time, duality, doorways, passages, frames, and endings. He is usually depicted as having two faces. The month of January is named for Janus (''Ianuarius''). According to ancient Roman farmers' almanacs, Juno was mistaken as the tutelary deity of the month of January; but, Juno is the tutelary deity of the month of June. Janus presided over the beginning and ending of conflict, and hence war and peace. The gates of a building in Rome named after him (not a temple, as it is often called, but an open enclosure with gates at each end) were opened in time of war, and closed to mark the arrival of peace. As a god of transitions, he had functions pertaining to birth and to journeys and exchange, and in his association with Portunus, a similar harbor and gateway god, he was concerned with travelling, trading and shipping. Janus had no flamen or specialised priest ''( sacerdos)'' a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concurrent Programming Languages
Concurrent computing is a form of computing in which several computations are executed '' concurrently''—during overlapping time periods—instead of ''sequentially—''with one completing before the next starts. This is a property of a system—whether a program, computer, or a network—where there is a separate execution point or "thread of control" for each process. A ''concurrent system'' is one where a computation can advance without waiting for all other computations to complete. Concurrent computing is a form of modular programming. In its paradigm an overall computation is factored into subcomputations that may be executed concurrently. Pioneers in the field of concurrent computing include Edsger Dijkstra, Per Brinch Hansen, and C.A.R. Hoare. Introduction The concept of concurrent computing is frequently confused with the related but distinct concept of parallel computing, Pike, Rob (2012-01-11). "Concurrency is not Parallelism". ''Waza conference'', 11 Januar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Logic Programming Languages
Logic is the study of correct reasoning. It includes both formal and informal logic. Formal logic is the science of deductively valid inferences or of logical truths. It is a formal science investigating how conclusions follow from premises in a topic-neutral way. When used as a countable noun, the term "a logic" refers to a logical formal system that articulates a proof system. Formal logic contrasts with informal logic, which is associated with informal fallacies, critical thinking, and argumentation theory. While there is no general agreement on how formal and informal logic are to be distinguished, one prominent approach associates their difference with whether the studied arguments are expressed in Formal language, formal or Natural language, informal languages. Logic plays a central role in multiple fields, such as philosophy, mathematics, computer science, and linguistics. Logic studies arguments, which consist of a set of premises together with a conclusion. Premis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
