Search: in
Actor model implementation
Actor model implementation in Encyclopedia Encyclopedia
  Tutorials     Encyclopedia     Videos     Books     Software     DVDs  
       
Encyclopedia results for Actor model implementation

Actor model implementation





Encyclopedia results for Actor model implementation

  1. Actor model implementation

    Copy to Wikibooks In computer science , Actor model implementation concerns implementation issues for the Actor model . Cosmic Cube The Cosmic Cube was developed by Chuck Seitz et al. at Caltech providing architectural support for Actor systems. A significant difference between the Cosmic Cube and most ... expression is 5, 7 or 9. See also Actor model and process calculi Actor model theory Forth ... SS 06 08. AAAI Press. March 2006. Category Actor model ... model is reflected in the hardware structure and operating system, and is also the explicit message ... bandwidth achieved across the many concurrent communication channels and the feasibility of the implementation ... messaging A uniform space of Actor addresses to which messages could be sent concurrently regardless of whether the recipient Actor was local or nonlocal A form of Actor pipelining see Actor model Concurrent Smalltalk which can be modeled using Actor model Actors was developed to program the J Machine. Prototype Actor Programming Language Hewitt 2006 presented a prototype Actor programming language ... language are defined by defining each program construct as an Actor with its own behavior ... Actors Each Eval message has the address of an Actor that acts as an environment with the bindings ... Bind identifier value customer is received by an Actor Environment, a new environment Actor is created such that when the new environment Actor receives Request Lookup identifier customer then if identifier ... Lookup identifier customer . The above builds on an Actor EmptyEnvironment which when it receives Request ... environment evalCustomer sub 1 sub where evalCustomer sub 1 sub is a new Actor such that when evalCustomer ... Request Eval environment evalCustomer sub 2 sub where evalCustomer sub 2 sub is a new actor such that when ... customer a new actor theReceiver such that when theReceiver receives a communication com, then create ... is received, send customer a new actor theReceiver such that when theReceiver receives Request message ...   more details



  1. Implementation maturity model assessment

    The implementation maturity model IMM is an instrument to help an organization in assessing and determining the degree of maturity of its implementation processes . This model consists of two important components, namely the five maturity levels, adopted from Capability Maturity Model capability maturity model CMM of the Software Engineering Institute Software Engineering Institute SEI . By assessing the maturity of different aspects of implementation processes, it becomes clear what their strengths and weaknesses are, and also where improvements are needed. Implementation maturity matrix, which is an adjusted version of the test maturity matrix found in the test process improvement TPI model ... of meta data model style text align left border 1 Concept Definition source Implementation process ..., pp.  166 169 Determine implementation maturity model elements levels After all dependencies ... situation of its implementation processes, and how it should pursue the desirable situation i.e. ... and indicates both the richness of an organization s implementation process and the consistency with which ... 0 Initial At this level, the organization lacks a stable environment for the implementation. Values are given to implementation aspects and implementation factors in an ad hoc fashion and there is no interconnection ... centrally during implementation projects and communication hardly takes place. The overall implementation lacks structure and control and its efficiency depends on individual skills, knowledge ... of the current one. Implementation aspects are considered during implementation projects ... per aspect. Projects are carried out under guidance of project operation standards and an implementation ... organization is focusing on the continuous improvement of the implementation processes. The organization possesses the means to detect weaknesses and to strengthen the implementation process proactively ..., the overall maturity for the implementation processes within an organization can be assessed ...   more details



  1. Actor model

    basis for several Actor model implementation practical implementations of concurrent systems . The relationship ... passing in the model. See Actor model implementation . Research on the Actor model has been carried ... model the sharing in concurrency. Behaviors also freed the Actor model from implementation details ... implementation of systems described by the Actor model require extensive optimization. See Actor ...Cleanup date June 2010 Citation style date September 2009 In computer science , the Actor model is a mathematical .... The Actor model originated in 1973. ref cite journal ref harvid Hewitt et al. 1973 author Carl Hewitt ... Intelligence publisher IJCAI year 1973 ref It has been used both as a framework for a Actor model ... and Actor model and process calculi . History Main History of the Actor model According to Carl Hewitt, unlike previous models of computation, the Actor model was inspired by physics including general ... core computing multi core computer architectures has revived interest in the Actor model. Following ... model theory . Major software implementation work was done by Russ Atkinson, Beppe Attardi, Henry ... Yonezawa Laboratory and elsewhere. Fundamental concepts The Actor model adopts the philosophy that everything ... software is typically executed sequentially, while the Actor model is inherently concurrent. An actor ... advance of the Actor model enabling asynchronous communication and control structures as patterns ... it has itself created. The Actor model is characterized by inherent concurrency of computation ... reasoning about systems in the Actor model. These include Operational semantics ref name greif1975 ... formalisms that are not fully faithful to the Actor model in that they do not formalize the guaranteed delivery of messages including the following See Actor model later history Attempts to relate ... TTCN 2 and TTCN 3 , follows Actor model rather closely. In TTCN, Actor is a test component either parallel ... semantics The Actor model is about the semantics of message passing. Unbounded nondeterminism controversy ...   more details



  1. History of the Actor model

    in defining the Actor model was to abstract away implementation details. For example, consider the following ... , the Actor model , first published in 1973 harv Hewitt et al. 1973 , is a mathematical model of concurrent computation . This article is about the early history of the Actor model. See Actor model middle history and Actor model later history for subsequent developments. Event orderings versus global state A fundamental challenge in defining the Actor model is that it did not provide for global ... for use in the Actor model since it has no global states. From the definition of an Actor, it can ... have been axiomatized in the Actor model and their relationship to physics explored see Actor model theory . Relationship to physics According to Hewitt 2006 , the Actor model is based on physics ..., algebra, etc. Physics influenced the Actor model in many ways, especially quantum indeterminacy ..., we await the outcomes. Models prior to the Actor model The Actor model builds on previous ... into later versions of Smalltalk. Petri nets Prior to the development of the Actor model, Petri ... channels Prior to the Actor model, concurrency was defined in low level machine terms of Thread computer ... channels . It certainly is the case that implementations of the Actor model typically make .... Implementations of the Actor model are free to make use of threads and locks in any way that is compatible ... as an integral part of the Actor model. One consideration was that such queues could themselves be modeled ... part of the Actor model? The idea of interpretation is that an Actor would be defined by how ... model. One consideration was that to process the tt eval tt messages, the program script of an Actor ... some kinds of parallelism but, in general, not the concurrency expressed in the Actor model. On the other hand, the Actor model is capable of expressing all of the parallelism in the lambda calculus ... functions Using the laws of the Actor model, Hewitt and Baker proved that any Actor that behaves ...   more details



  1. Actor model middle history

    Copy to Wikibooks In computer science , the Actor model , first published in 1973 harv Hewitt et al. 1973 , is a mathematical model of concurrent computation . This article reports on the middle history of the Actor model in which major themes were initial implementations, initial applications, and development of the first proof theory and denotational model. It is the follow on article to Actor model early history which reports on the early history of the Actor model which concerned the basic development of the concepts. The article Actor model later history reports on developments after the ones reported in this article. Proving properties of Actor systems Carl Hewitt 1974 published the principle of Actor induction which is Suppose that an Actor tt x tt has property tt P tt when it is created ... doctoral dissertation, Aki Yonezawa developed further techniques for proving properties of Actor systems including those that make use of Actor model and process calculi Migration migration . Russ ... Sassone 2004 . A denotational model of Actor systems In his doctoral dissertation, Will Clinger developed the first denotational model of Actor systems. See denotational semantics of the Actor model .... March 2004. Category Actor model Category History of computing ... the automatic reclamation of unused storage was an important theme in the development of the Actor model. In his doctoral dissertation, Peter Bishop developed an algorithm for garbage collection in distributed ... generational garbage collection . Actor programming languages Henry Lieberman, Dan Theriault, et al. developed Act1, an Actor programming language. Subsequently for his masters thesis, Dan Theriault ... Metaphor in his doctoral disseration. William Athas and Nanette Boden 1988 developed Cantor which is an Actor ... to extend Smalltalk 80 for Actor computations. Christine Tomlinson, Mark Scheevel, Greg Lavender, Greg Meredith, et al. 1995 at MCC developed an Actor programming language for InfoSleuth agents in Rosette ...   more details



  1. Actor model later history

    Seitz developed the Actor model implementation Cosmic Cube Cosmic Cube which was one of the first message passing Actor architectures. Subsequently at MIT researchers under the leadership of Bill Dally developed the Actor model implementation J Machine J Machine . Attempts to relate Actor semantics ...Copy to Wikibooks In computer science , the Actor model , first published in 1973 harv Hewitt et al. 1973 , is a mathematical model of concurrent computation . This article reports on the later history of the Actor model in which major themes were investigation of the basic power of the model, study ... on article to Actor model middle history which reports on the initial implementations, initial applications, and development of the first proof theory and denotational model. Power of the Actor Model Investigations began into the basic power of the Actor model. Carl Hewitt 1985 argued that because of the use of Arbiter electronics Arbiters that the Actor model was more powerful than logic ..., like the Actor model, the Prolog like concurrent systems were based on message passing and consequently ... issues of compositionality in the Actor model. Actor configurations have receptionists that can receive messages from outside and may have the addresses of the receptionists of other Actor configurations. In this way two Actor configurations can be composed into another configuration whose subconfigurations can communicate with each other. Actor configurations have the advantage that they can ... of having to poll to get messages from multiple sources see Actor model and process calculi Issues ... see unbounded nondeterminism . Recent developments Recent developments in the Actor model .... Hewitt Hewitt 2006a, 2006b is attempting to use the Actor model to address these challenges ... and Carolyn Talcott 1998 , M. Gaspari and G. Zavattaro 1999 have attempted to relate Actor semantics to algebra. Also John Darlington and Y. K. Guo 1994 have attempted to relate linear logic to Actor ...   more details



  1. Actor model theory

    of the Actor model The Timed Diagrams Model technically simpler denotational model that is easier to understand. See also Actor model early history Actor model and process calculi Actor model implementation ...Refimprove date August 2011 In theoretical computer science , Actor model theory concerns theoretical issues for the Actor model . Actors are the primitives that form the basis of the Actor model of concurrent digital computation. In response to a message that it receives, an Actor can make local decisions .... Actor model theory incorporates theories of the events and structures of Actor computations, their proof theory, and denotational semantics of the Actor model denotational models . Events and their orderings From the definition of an Actor, it can be seen that numerous events take place local ... and relativity theory . Therefore, since the Actor model is based on physics, the Law of Finite Chains Between Events in the Combined Ordering was taken as an axiom of the Actor model. Law of Discreteness ... semantics Clinger 1981 used the Actor event model described above to construct a Denotational semantics of the Actor model Clinger.27s Model denotational model for Actors using power domains ..., Organizational, and Social COINS AAMAS. 2006. Category Actor model Category Denotational semantics ... of a message sent to an Actor. This article reports on the results published in Hewitt 2006 . Law of Countability ... e sub 1 sub tt the set tt e e e sub 1 sub tt is finite. Arrival orderings The arrival ordering of an Actor ... circuit called an Arbiter electronics arbiter . The arrival events of an Actor are on its world line . The arrival ordering means that the Actor model inherently has indeterminacy see Indeterminacy in concurrent computation . Because all of the events of the arrival ordering of an actor tt x tt happen on the world line of tt x tt , the arrival ordering of an actor is relativistically invariant . I.e. ... to show that there is an Actor computation that satisfies the previously stated laws but violates ...   more details



  1. Actor model and process calculi

    Copy to Wikibooks In computer science , the Actor model and Process calculi process calculi are two closely ... . See Actor model and process calculi history . There are many similarities between the two approaches, but also several differences some philosophical, some technical There is only one Actor model ..., or constructs specific to application areas such as security analysis . The Actor model was inspired ... Actor model theory the process calculi were originally inspired by algebra harv Milner 1993 . Processes ... can also be used to model channel like communications harv Cardelli and Gordon 1998 . In contrast, actors in the Actor model possess an identity, and communicate by sending messages to the mailing addresses of other actors this style of communication can also be used to model channel like communications &mdash see below . The publications on the Actor model and on process calculi have a fair number of cross references, acknowledgments, and reciprocal citations see Actor model and process calculi ... both semantics and performance. Some process calculi differ from the Actor model in their use ... from multiple channels Again consider the program written in CSP discussed in Actor model and process ... protocol Actor model and process calculi A simple distributed protocol A simple distributed ...     process2 b As pointed out in Knabe 1992 , an issue with the above protocol Actor model ... 1992 , an issue with the above protocol Actor model and process calculi A simple distributed protocol ... section Actor model and process calculi Livelock on getting from multiple channels Livelock ... model using domain theory in denotational semantics of the Actor model Clinger s Model his dissertation in 1981. His semantics contrasted the unbounded nondeterminism of the Actor model with the bounded ... semantics of the Actor model The Timed Diagrams Model timed diagrams . Ugo Montanari and Carolyn ... AAMAS. 2006. Category Actor model Category Process calculi ...   more details



  1. Implementation

    Refimprove date December 2009 Wiktionary Implementation is the realization of an application, or execution of a plan , idea, scientific modelling model , design , specification , Standardization standard , algorithm , or policy . Computer Science In computer science , an implementation is a realization of a technical specification or algorithm as a computer program program , software component , or other computer system through programming and Software deployment deployment . Many implementations may exist for a given specification or standard. For example, web browser s contain implementations of World Wide Web Consortium recommended specifications, and software development tools contain implementations of programming languages . IT Industry In the IT Industry, implementation refers to post sales process of guiding a client from purchase to use of the software or hardware that was purchased. This includes Requirements Analysis, Scope Analysis, Customizations, Systems Integrations, User Policies, User Training and Delivery. These steps are often overseen by a Project Manager using Project Management Methodologies set forth in the Project Management Body of Knowledge. Software Implementations involve several professionals that are relatively new to the knowledge based economy such as Business ... , and Project Managers. IT Implementation and the Role of End users System implementation generally ... been a problem area for information systems implementation efforts. Users and information systems specialists ... Science In political science , implementation refers to the carrying out of public policy . Legislatures ... impacting implementation include the legislative intent, the administrative capacity of the implementing ... of implementation Direct changeover Parallel running or as known as parallel Pilot introduction ... . Thank you Khaitov See also Interface computer science Programming language implementation Algorithm ... ru sq Implementimi sv Implementation samh llskunskap uk ...   more details



  1. Denotational semantics of the Actor model

    Copy to Wikibooks The denotational semantics of the Actor model is the subject of denotational domain theory for Actor model Actors . The historical development of this subject is recounted in Hewitt 2008b . Actor fixed point semantics The denotational theory of computational system semantics is concerned ... are called Domain theory domains . The Actor model Actor uses the domain of event diagram scenarios ... sub 1 sub tt and tt expression sub 2 sub tt . The Actor model provides a modern and very general ... semantics for concurrent programming languages. One solution to this problem is to use the Actor model of computation. In Actor model, programs are Actors that are sent tt Eval tt messages with the address ... from the denotational semantics of the Actor model an idea published in Hewitt 2006 . Environments ... calculi and the Actor model provide a denotational semantics for tt expression sub 1 sub expression ... the first denotation semantics for the Actor model. The domain of Actor computations Clinger 1981 ... obeys all the laws of Actor model theory . The finite elements of TimedDiagrams are countable where ... scheduled event e and X e e sub 1 message sub e see Actor model theory , Flow d is defined to be the set ... Noriega .et. al. editors. LNAI 4386. Springer Verlag. 2007. Category Actor model Category Denotational semantics Actor model, denotational semantics zh ... computer science closure Actor process C that has an address called body for tt L tt and an address called environment for E . The Actor tt L 1 2 tt then sends C the message 1 2 . When C receives the message 1 2 , it creates a new environment Actor F which behaves as follows When it receives ... The Actor process C then sends an tt Eval tt message with environment F to the following actor process ... expressions For another example consider the Actor for the expression tt expression sub 1 sub expression ... expression sub 2 sub tt . When the composite expression Actor process receives an tt Eval tt message ...   more details



  1. Actor model and process calculi history

    The Actor model and process calculi share an interesting history and co evolution. Early work The Actor ... Actor Formalism for Artificial Intelligence IJCAI 1973. ref is a mathematical model of concurrent computation . The Actor model treats Actors as the universal primitives of concurrent digital computation ... approach based on composing sequential processes, the Actor model was developed as an inherently concurrent model. In the Actor model sequentiality was a special case that derived from concurrent computation as explained in Actor model theory . Robin Milner s initial published work on concurrency ... on sequential processes. His work differed from the Actor model in the following ways There are a fixed number of processes as opposed to the Actor model which allows the number of Actors to vary dynamically ... topology as opposed to the Actor model which allows varying topology Communication is synchronous as opposed to the Actor model in which an unbounded time can elapse between sending and receiving a message. The semantics provided bounded nondeterminism unlike the Actor model with unbounded nondeterminism ... in his work on the Pi calculus see section Actor model and process calculi history Milner.2C ... Sequential Processes was different from the Actor model which states ref C.A.R. Hoare . Communicating ... version of CSP differed from the Actor model in the following respects Clinger 1981 The concurrency ... process in contrast to the Actor model in which execution was fundamentally concurrent. Sequential ... mechanism for generating parallelism in the Actor model sending more messages generates the possibility ... was between processes whereas in the Actor model communications are one way to Actors. Synchronous ... processes see Actor model and process calculi . Data structures consisted of numbers, strings, and arrays whereas in the Actor model data structures were Actors. Restricting data structures to numbers ... contain numbers and strings whereas in the Actor model messages could include the addresses of Actors ...   more details



  1. Reference implementation

    In the software development process , a reference implementation or, less frequently, sample implementation or model implementation is the standard software standard from which all other implementations, with their attendant customizations, are measured, and to which all improvements are added. An improving reference implementation in turn reflects its unchanging specification technical standard specification , or else an attempt at an implementation may prove that the specification is impractical and needs improvement itself. clarifyme date January 2012 Software testing Testing the implementation specification relationship further enhances the Product family engineering production s inter process efficiencies cquote A reference implementation is, in general, an implementation of a specification to be used as a definitive interpretation for that specification. During the development of the ... conformance test suite, at least one relatively trusted implementation of each interface is necessary to 1 discover errors or ambiguities in the specification, and 2 validate the correct functioning of the test suite. ref Dalci, Eric Fong, Elizabeth Goldfine, Alan 2003 . Requirements for GSC IS Reference Implementations . National Institute of Standards and Technology, Information Technology Laboratory. http xw2k.sdct.itl.nist.gov smartcard document ref imp51.pdf ref cquote Characteristics of a Reference Implementation 1 Developed concurrently with spec and test suite 2 Verifies that specification is implementable 3 Enables the test suite to be tested 4 Serves as Gold Standard against which other implementations can be measured 5 Helps to clarify intent of specification where conformance tests are inadequate ref Curran, Patrick 2003 . Conformance Testing An Industry Perspective . Sun ... implementation may or may not be production quality. For example, the Fraunhofer Society Fraunhofer reference implementation of the MP3 standard usually does not compare favorably to other common ...   more details



  1. Implementation intention

    copyedit date January 2012 An implementation intention II is a self regulatory strategy in the form of an if then plan ... behavior. The concept of implementation intentions was introduced by the psychologist Peter Gollwitzer for a summary see Gollwitzer, 1999 . ref Gollwitzer, P. M. 1999 . Implementation intentions Strong ... & Brandstatter, 1997 ref Gollwitzer, P. M., & Brandstaetter, V. 1997 . Implementation intentions and effective goal pursuit. Journal of Personality and Social Psychology, 73, 186 199. ref that implementation ... behavior, can be faced by using implementation intentions. This if then plan does not name a goal .... It is also assumed that an implementation intention, once set, will run non consciously. This process ... the plan set and the goal is very important for the implementation intention to have an effect on people s behavior. Without commitment, an implementation intention will hardly have an effect on goal directed behavior. Speaking in terms of the phase model of action Gollwitzer, 1990 , ref Gollwitzer ... Press. ref the use of implementation intention takes place in the postdecisional phase implemental ... committed to a goal and an implementation intention can be a good strategy to reach this goal. Implementation Intentions and Goal Shielding A lot of research concerning implementation intentions ..., 2006 ref Gollwitzer, P. M., & Sheeran, P. 2006 . Implementation intentions and goal achievement ... . ref Achtziger, A., Gollwitzer, P. M., & Sheeran, P. 2008 . Implementation intentions and shielding ... influence of implementation intentions on protecting ongoing goal striving. Participants who formed implementation intentions were more successful with long term dieting and concentration and performance ... validity and thus show the importance and meaningfulness of implementation intentions for everyday life. Implementation Intentions and the Strategic Automation of Emotion Regulation In 2009 Gallo, Keil ... to address the effectiveness of implementation intentions in regulating emotional reactivity. Therefore ...   more details



  1. Open implementation

    In computing , open implementation platform computing platforms are systems where the implementation is accessible. Open implementation allows developers of a program to alter pieces of the underlying software to fit their specific needs. With this technique it is far easier to write general tools, though it makes the programs themselves more complex to design and use. There are also open language implementation s, which make aspects of the language implementation accessible to application programmers. Open implementation is not to be confused with open source , which allows users to change implementation source code, rather than using existing application programming interface s. See also Aspect oriented programming for a successor concept in research Metaobject protocol for the primary implementation means Software architecture for organization of software in general External links http www2.parc.com csl groups sda projects oi site guide.html Links pertaining to open implementation Category Free software culture and documents compu stub ...   more details



  1. SAP implementation

    No footnotes date July 2011 howto date April 2012 SAP implementation is the whole of processes that defines ... software in an organization . The SAP implementation method described in this entry is a generic method and not a specific implementation method as such. It is based on best practice s and case ... that make up a complete implementation method to allow any organization to plan and execute the implementation of SAP software. Introduction The implementation of SAP AG SAP software , such as SAP ... end users of the SAP software. The resulting changes that the implementation of SAP generates are intended ... as people will work with the same information . It is therefore very important that the implementation process is planned and executed with the usage of a solid method. There are various SAP implementation ... is available. This study shows that designing IT architecture is very critical in SAP implementation ... dealt with a troubled SAP R 3 implementation in an international fast moving consumer goods ..., Germany. www.wikipedia.org SAP IMPLEMENTATION PROJECT PLAN A comprehensive project plan that contains all products that are delivered whilst performing an SAP implementation project Anderson, 2003 ... Organization. The people that are committed to implementation and management of SAP. Anderson, 2003 ... table provides a summary of all of the activities that form the SAP implementation process. These activities ... the near term objectives of the implementation, which are to develop and begin Installation computer programs installation implementation of the SAP data center . Execute training Train the various members ... of implementing the changes related to the SAP implementation . Address SAP systems and operations ... Implementation processes Project preparation The project preparation phase, depicted below, focuses ... allow an organization to put in on the right track towards implementation . Design and initially ... and blueprinting phase and forms the main chunk of the implementation process. The phase ...   more details



  1. Brand implementation

    marketing Brand implementation refers to the physical representation and consistent application of brand identity across visual and Brand language verbal identity carriers. In visual brand language visual terms, this can include signage , uniforms , liveries , interior design and branded merchandise. Brand implementation encompasses facets of architecture , product design , industrial design , quantity surveying , engineering , procurement , project management and retail design . Brand implementation means the continuous and consistent application of the brand s image in all business units, all ... whole. In that respect, brand implementation must be seen as a continuous process, one which will require ... or one s own company structure. ref Misof, Guenther 2007 . Brand Implementation. Managing and Controlling Brand Identity , Germany ref Background Brand implementation emerged as a discipline in the 1990s ..., brand implementation was handled by various parties, including shop fitters, interior designers ... dissymmetry meant suppliers had too much control over brand issues. Brand implementation was thus coined .... Today Brand implementation is now a critical discipline focused on binding the relationship between the target audience and the brand. This allows brand implementation firms to identify the best possible ... the Golden Butterfly to BDO in the Best Implementation of a Rebrand category. ref http communicatemagazine.co.uk ... feasibility, consistent implementation and complete control are the key problems of brand implementation. Moreover there are five large stumbling blocks that stand in the way of effective implementation ... Implementation Group, 2006 2011 ref Magic and Logic Brand implementation does not involve the design or creation of brand identity. Instead, brand implementation agencies work closely with branding ... look after the Magic creative and brand implementation agencies look after the Logic implementation ... management Implementation Category Brands Implementation Category Branding companies Category Communication ...   more details



  1. Implementation research

    Implementation research is the scientific study of methodology methods to promote the uptake of research findings. Often research projects focus on small scale pilot studies or laboratory based experiments, and assume that findings can be generalised to roll out into a practice based domain with few changes. Implementation research explores the challenges that are faced when generalising research findings in the real world , for example in the fields of healthcare or school based education. References Walker, Anne E., Grimshaw, J., Johnston, M., Pitts, N. Steen, N., and Eccles, M. PRIME PRocess modelling in ImpleMEntation research selecting a theoretical basis for interventions to change clinical practice. BMC Health Services Research 2003, 3 22 doi 10.1186 1472 6963 3 22 http www.biomedcentral.com 1472 6963 3 22 Category Methodology Category Research methods ...   more details



  1. Implementation shortfall

    unreferenced date May 2009 In financial markets , Implementation Shortfall is the difference between the decision price and the final execution price including commissions, taxes, etc. for a trade. This is also known as the slippage . Agency trading is largely concerned with minimizing implementation shortfall and finding liquidity . Decision Price The decision price is the price of the stock that prompted the decision to buy or sell. The most common decision prices is the close price or the arrival price. If we split the decision to buy a stock from the actual trading of the stock, as is often the case with fund managers decision makers and brokers trade executors , you can see why both are used. From the fund manager s point of view, his decision to trade is often based on the closing price of the day s trading along with the entire history of the stock and other signals indicators . When he decides to buy a particular stock the next day, it is because he believes that the price will go up from that closing price. Thus his decision price is the close price . However the broker, unless she is explicitly told what levels to buy at or what prompted the desire to buy, does not know when or why the decision was made. Her best guess is that the current price at the time the order is received is what prompted the decision and thus her decision price is the arrival price . There is no common definition of this price, but the broker normally uses the last traded price or the mid price equal to the average of the current bid and ask prices being quoted at the time the order was received. Brokerage firms specialize in developing algorithmic strategies, and providing them to the institutional investment community, that aid in the quest to outperform benchmarks such as Implementation Shortfall. See also Algorithmic Trading Algorithmic Trading Platforms Market Impact finance stub Category Financial economics Category Financial markets ...   more details



  1. Joint Implementation

    Joint implementation JI is one of three flexibility mechanisms set forth in the Kyoto Protocol to help countries with binding greenhouse gas emissions targets so called United Nations Framework Convention on Climate Change Annex I countries Annex I countries meet their obligations. JI is set forth in Article 6 of the Kyoto Protocol . ref For more on JI see http unfccc.int kyoto protocol mechanisms joint implementation items 1674.php ref Under Article 6, any Annex I country can invest in emission reduction projects referred to as Joint Implementation Projects in any other Annex I country as an alternative to reducing emissions domestically. In this way countries can lower the costs of complying with their Kyoto Protocol Kyoto targets by investing in greenhouse gas reductions in an Annex I country where reductions are cheaper, and then applying the credit for those reductions towards their commitment goal. A JI project might involve, for example, replacing a coal fired power plant with a more efficient combined heat and power plant. Most JI projects are expected to take place in so called economies in transition, noted in Annex B of the Kyoto Protocol. ref Annex B of the Kyoto Protocol identifies 12 economies in transition Bulgaria , Croatia , the Czech Republic , Estonia , Hungary , Latvia , Lithuania , Poland , the Russian Federation , Slovakia , Slovenia , and Ukraine . ref Currently Russia and Ukraine are slated to host the greatest number of JI projects. ref http www.cdmpipeline.org ji projects.htm 1 For a list of JI projects currently in the pipeline see ref Unlike the case ... by the committee of the UNFFCC. External links http ji.unfccc.int UNFCCC Joint Implementation on the UNFCCC pages. http www.jiqweb.org Foundation Joint Implementation Network Host of the Joint Implementation Quarterly JIQ newsletter. http www.bmu.de klimaschutz internationale klimapolitik ... change policy Category Carbon finance de Joint Implementation et hisrakendus fr Application ...   more details



  1. Phased implementation

    example farm date September 2011 ref cite web last Copley first Steve title IGCSE ICT url http www.igcseict.info theory 8 implem accessdate 13 August 2011 ref ref cite book last Wainwright first Stewart title IGSCE and O Level Computer Science Computer Studies and Information Technology year 2009 publisher Cambridge University Press pages 29 url www.cambridge.org 9780521545402 ref Phased implementation is a method of changing from an existing system to a new one. File Phased implementation.png right Phased implementation is a changeover process that takes place in stages. Think of a supermarket for example. Imagine that only the vegetable section is changed over to the new system while the rest carries on with the old. If the new system does not work properly, it won t matter too much because only a small part of the supermarket has been computerised. If it does work, staff can take turns working on the vegetables counters to get some practice using the new system. After the vegetables section is working perfectly, the meat section might be next, and so on. Eventually all the parts of the supermarket system would have been phased in and the whole thing would be running. This takes a long time and there are two systems working until the changeover is completed. However, the supermarket is never in danger of having to shut and the staff are all able to get plenty of training, so it is a much friendlier method. Other methods of system changeover include Direct changeover and parallel running . References Reflist Category Project management business stub ...   more details



  1. Implementation theory

    Implementation theory is an area of game theory closely related to mechanism design where an attempt is made to add into a game a mechanism such that the equilibrium of the game conforms to some concept of social optimality for instance Pareto optimality . In a game where multiple agents are to report their preferences or their type , it may be in the best interest of some agents to lie about their preferences. This may improve their outcome game theory payoff , but it may not be seen as a fair outcome to other agents. In order to implement a more fair outcome, in a repeated game, the other players may choose to punish any cheaters . The conditions of a repeated game where an arbitrary outcome may be enforced are set out in theorems often known as folk theorem game theory folk theorems . If a game is not repeated, it may only be possible to implement outcomes which are Nash equilibrium Nash equilibria or satisfy some other equilibrium selection equilibrium concept. game theory Category Game theory ...   more details



  1. Product software implementation method

    Unreferenced date December 2009 Orphan date December 2009 A product software implementation method is a systematically ... modeling Process Modeling side of the implementation of large explained in complexity differences product software , using the implementation of Enterprise Resource Planning systems as the main example to elaborate on. Overview A product software implementation method is a blueprint to get ... alignment from the organizational view and acceptance from the human view. The implementation of product ... perspective of a major issue. It is stated that the implementation of product software consumes up to 1 3 of the budget of a software purchase more than hardware and software requirements together . Implementation ... issues. Examples are the number of end users that will use the product software, the effects that the implementation ..., more, less . An example of the smaller product software is the implementation of an office package ... significantly. An example of larger product software is the implementation of an Enterprise Resource Planning system. The implementation requires in depth insights on the architecture of the organization ... the implementation time and budget on the soft side of the implementation budget. Redesigning ... are possible... because the support was created for the specific integrity of the software. Implementation Frameworks The guiding principle versus the profession Another issue on the implementation process of product software is the choice, or actually the question, to what extent an implementation method should be used. Implementation methods can on the one hand be used as a guiding principle, indicating that the method serves as a global idea about how the implementation phase of any project ... method, but will result in ambiguity when questions arise in the execution of the implementation .... This view is very useful if the implementation process is very complex and is very dependent on exact ... indicate that more flexibility in an implementation method leaves more room for the soft side of implementation ...   more details



  1. Model

    TOC right Wiktionary model Model may refer to Physical Physical model , a physical representation of an object Scale model , a replica or prototype of an object 3D modelling , a 3D polygonal representation of an object, usually displayed with a computer Model aircraft Car model Model building , a hobby ... of the solid parts of an object, also called in vitro models Model organism , a simple organism used as model in biology Model product , an identifier of a product given by its manufacturer also called model number . Human models Model art , a person who poses to be depicted in art, for example in art school Model person , a person employed to display his or her looks or something such as a commercial product Fetish model , a model who wears the clothing and or devices of sexual fetishes Promotional model , a person who interacts with consumers to draw attention to and often inform them about a product Pseudo model , lang mo u a term coined in Hong Kong for young would be models Role model , a person who serves as a behavioural or moral example to others Nonphysical Abstract Conceptual model , a nonphysical model Interpretation logic , a model is part of an interpretation of facts in logic, a mapping of truth values to sentences. Mathematical model , an abstract model that uses mathematical language Structure mathematical logic , in model theory often called just a model or semantic model Applied Business model , a framework of the business logic of a firm Causal model , an abstract model that uses cause and effect logic Computer model , a computer program which attempts to simulate an abstract model of a particular system Molecular model , a physicochemical or mathematical description that models the behaviour of molecules Data model , a description of database structure Economic model , a theoretical construct representing economic processes Ecosystem model , a representation of components and flows through an ecosystem Graphical model , a probabilistic model for which ...   more details



  1. Model A

    Model A may refer to Ford Model A 1927 1931 , a model of car built by the Ford Motor Company Ford Model A 1903 1904 , a model of car built by the Ford Motor Company One of the letter series models of Farmall tractors One of the letter series models of John Deere tractors by Deere & Company A structural model of personality in Socionics see Socionics Model A Socionics Model A Model A band , an art rock band from California A character mode in the video game Mega Man ZX Advent Ritz Model A , ultralight aircraft disambig ...   more details



  1. Gambit (Scheme implementation)

    Infobox Software name Gambit logo screenshot caption developer Marc Feeley latest release version 4.6.4 latest release date Release date and age 2012 2 13 operating system Cross platform genre Programming language license GNU Lesser General Public License LGPL Apache License website http gambit.iro.umontreal.ca gambit.iro.umontreal.ca standard R4RS, R5RS, several others. Gambit , also called Gambit C, is a free software Scheme programming language Scheme implementation , consisting of a Scheme Interpreter computing interpreter , and a compiler which compiles Scheme to C programming language C . Its documentation ref cite web url http dynamo.iro.umontreal.ca gambit wiki index.php Documentation title Documentation work Gambit wiki accessdate 2010 03 06 ref claims conformance to the R sup 4 sup RS, R sup 5 sup RS, and IEEE standards, as well as several Scheme Requests for Implementation SRFI s. Gambit was first released 1988, and Gambit C that is, Gambit with the C backend was first released 1994. Termite Scheme Termite Scheme is a variant of Scheme implemented on top of Gambit C. Termite is intended for distributed computing ref cite conference title Concurrency oriented programming in Termite Scheme authors Guillaume Germain, Stefan Monnier, Marc Feeley url http www.schemeworkshop.org 2006 09 germain.pdf format PDF date 2006 09 17 booktitle Scheme and Functional Programming 2006 conferenceurl http www.schemeworkshop.org 2006 index.html accessdate 2010 03 06 ref , it offers a simple and powerful message passing model of concurrency, inspired by that of Erlang programming language Erlang . C and Objective C integration While the compiler itself produces solely C code, it has full integration support for C and Objective C compilers such as GNU Compiler Collection Languages GCC . Thus, software written in Gambit C can contain C or Objective C code, and can fully integrate with corresponding libraries. See Also Chicken Scheme implementation Chicken Stalin Scheme implement ...   more details




Articles 1 - 25 of 325382          Next


Search   in  
Search for Actor model implementation in Tutorials
Search for Actor model implementation in Encyclopedia
Search for Actor model implementation in Videos
Search for Actor model implementation in Books
Search for Actor model implementation in Software
Search for Actor model implementation in DVDs
Search for Actor model implementation in Store


Advertisement




Actor model implementation in Encyclopedia
Actor model implementation top Actor model implementation
Home - Add TutorGig to Your Site - Disclaimer

©2011-2013 TutorGig.info All Rights Reserved. Privacy Statement