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Topic: High Level Architecture

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	High Level Architecture - Wikipedia, the free encyclopedia
		The High Level Architecture (HLA) is a general purpose architecture for distributed computer simulation systems.
		In a federation, all representation of objects in the FOM shall be in the federates, not in the run-time infrastructure (RTI).
		HLA (in both the current IEEE 1516 version and its ancestor "1.3" version) is the subject of the NATO draft standardization agreement (STANAG 4603) for modelling and simulation: Modelling And Simulation Architecture Standards For Technical Interoperability: High Level Architecture (HLA).
	en.wikipedia.org /wiki/High_Level_Architecture (629 words)

	Citations: The High Level Architecture Homepage - Modeling, Office (ResearchIndex) (Site not responding. Last check: 2007-11-03)
		HLA is scheduled to become the IEEE standard 1516 by the end of 1999.
		The architecture is defined by : Rules which govern the behavior of the overall distributed simulation (Federation) and their members (Federates) An interface specification, which prescribes the interface between each federate and the Runtime Infrastructure (RTI) which provides....
		The HLA is defined by : Rules which govern the behavior of the overall distributed simulation (Federation) and their members (Federates) an Interface Specification, which prescribes the interface between each federate and the Runtime Infrastructure (RTI) which provides communication and....
	citeseer.ist.psu.edu /context/524881/0 (885 words)

	eScience : Intro to NVE : 20 / 29 : High Level Architecture (HLA)
		HLA is a framework for distributed simulation systems developed by the U.S. Defense Modeling and Simulation Office (DMSO).
		HLA attempts to provide a very generic environment that any virtual object can attach to in order to participate in a simulation.
		HLA is adopted as the facility for Distributed Simulation Systems 1.0 by the Object Management Group (OMG) and is now in the process of becoming an open standard through the IEEE.
	cs.anu.edu.au /escience/lecture/ivr/Web3D/hla.en.html (846 words)

	Amazon.ca: Creating Computer Simulation Systems: An Introduction to the High Level Architecture: Books: Frederick ... (Site not responding. Last check: 2007-11-03)
		The HLA, adopted by the U.S. Department of Defense, has been years in the making and recently has shot out ahead of its competitors to grab the attention of engineers and designers worldwide.
		The High Level Architecture (HLA) is the first consistent standard for creating component-based computer models and simulations.
		One thing I will be looking for is the impact of the architecture on simulation performance, scalability in practice (as opposed to in theory), and how is HLA likely to evolve over the next couple decades.
	www.amazon.ca /Creating-Computer-Simulation-Systems-Architecture/dp/0130225118 (1276 words)

	MITRE - News and Events - MITRE Publications - The MITRE Digest - Archives - 1999 - High Level Architecture
		The HLA RTI is the general purpose distributed operating system software that provides the common interface services utilized during the runtime of an HLA federation.
		This work was undertaken to provide the HLA community with functional RTI software during the span of time between the approval of the HLA and the point at which commercial RTIs would be made available.
		The HLA is in the process of becoming an open standard through the IEEE, and has been proposed for acceptance by NATO as the standard for simulations used within the NATO Alliance.
	www.mitre.org /news/digest/archives/1999/high_level_architecture.html (1733 words)

	[No title] (Site not responding. Last check: 2007-11-03)
		In particular, very little work has been done on the higher level, cognitive aspects of robot control and the development of architectures that allow one to easily integrate the diverse software modules that may be put together to create a complex robotics application.
		The aim of this project is to develop a robust architecture that allows one to integrate diverse software modules (e.g., speech, natural language, low-level controllers and high-level, deliberative controllers) into a sophisticated robotic control system.
		The architecture should not depend on the robotic hardware platform on which the system is to run but be easily portable across architectures.
	www.cse.unsw.edu.au /~morri/Hons/arch.html (359 words)

	Web Architecture from 50,000 feet
		I have resisted the urge, and requests, to try to write an architecture for a long time: This was from a feeling that a dead and therefore less valuable document must any attempt to select which, of all the living ideas, seem most stable, logically connected and essential.
		When the URI architecture is defined, and when one has the use of at least one dereferencable protocol, then all one needs for an interoperable global hypertext system is at least one common format for the content of a resource, or Web object.
		However, architecturally this is an unnecessary central point of control, and there is no reason why the Web itself should not be used as a repository for new types.
	www.w3.org /DesignIssues/Architecture.html (6779 words)

	IEEE Begins to Revise Four Simulation Standards
		HLA is used in simulations for training, analysis and other functions in many fields, including defense, entertainment and medicine.
		IEEE P1516 "Standard for Modeling and Simulation (MandS) High Level Architecture (HLA)--Framework and Rules", which describes the general principles defining HLA and delineates rules that apply to HLA federations and federates.
		IEEE P1516.1 "Standard for Modeling and Simulation (MandS) High Level Architecture (HLA)--Federate Interface Specification", defines the interface between federates (simulations, supporting utilities or interfaces to live systems) and the underlying software services that support interfederate communication in a distributed simulation domain.
	standards.ieee.org /announcements/pr_simulation.html (460 words)

	[No title]
		If you are interested in submitting information relating to HLA for presentation on this website, follow this link.
		Introduction to the High Level Architecture--answers the question "What is the HLA" and provides a general introduction to the three components of the HLA.
		Basic Concepts of HLA Simulations--describes the basic services used by a HLA Federate, uses helloWorld as an example of an HLA Federate.
	www.ecst.csuchico.edu /~hla/courses.html (512 words)

	[No title] (Site not responding. Last check: 2007-11-03)
		It is generally guided by two principles—the separation of presentation and processing and the desirability of small and specialized classes.
		Each of the major classes/interfaces of the architecture is briefly introduced in the following section.
		As necessary, additional methods and attributes can be added during detailed design; however, the methods and features defined in the attached source documents cannot be changed without a discussion of the impact of the proposed change on the architecture as a whole.
	members.aol.com /brunyatefw2/storage/eel5881/HighLevelDesign.doc (563 words)

	Citations: High level architecture - Modeling, Oce (ResearchIndex) (Site not responding. Last check: 2007-11-03)
		As a successor to the DIS (Distributed Interactive Simulation) protocol, HLA provides a robust architecture with which distributed discrete event and other types of simulations can be designed.
		HLA simulations are composed of federates, these are gathered to form federations, interaction....
		Both the agents and the main simulator are designed according to a OO layout to support distribution (of objects) modularity, scalability and interactivity as demanded by the HLA....
	citeseer.ist.psu.edu /context/1388621/0 (517 words)

	Project SECME -- High-Level Design
		In order to minimize the increase in complexity, the objective of the team will be to implement the functionality proposed in the requirements on a priority basis, with the optional requirements being implemented after the compulsory requirements are met.
		This is based on the fact that one of the team members is versed in Java technologies and so the steepness of the learning curve can be reduced.
		A major factor in this representation of the architecture is the need for lucidity in explaining the structure of the system.
	www.geocities.com /secmep/pages/highlevel.htm (829 words)

	GTRI \| ITTL \| Migrating Legacy Simulations to the High Level Architecture (HLA)
		The Distributed Simulation Interface Framework (DSIF) is a software framework that defines and implements a general approach to distributed simulation using the High Level Architecture (HLA).
		To support the wide variety of simulations used at GTRI, the interface had to be very configurable and require minimal HLA knowledge to develop a compliant HLA federate.
		Using a framework to develop simulations decreases the amount of time needed to develop each individual simulation because the functionality provided by the framework is implemented and extensively tested only once.
	www.gtri.gatech.edu /ittl/csit/proj_legacysim.html (358 words)

	Agile Model Driven Development (AMDD)
		The goal of the initial architecture modeling effort is to try to identify an architecture that has a good chance of working.
		By identifying the high-level requirements early, and by identifying a potential architecture early, you have enough information to produce an initial cost estimate and schedule.
		Your initial architecture modeling efforts enable you to identify the major areas of technical risk early in the project without taking on the risk of over modeling your system.
	www.agilemodeling.com /essays/amdd.htm (2657 words)

	High Level Architecture for Simulation (Site not responding. Last check: 2007-11-03)
		The High Level Architecture (HLA) provides the specification of a common technical architecture for use across all classes of simulations in the US Department of Defense.
		The HLA Rules are a set of 10 basic rules that define the responsibilities and relationships among the components of an HLA federation.
		This paper provides a description of the motivations for the development of the HLA and the process instituted to develop the architecture well as a technical description of the key elements of architecture and supporting software.
	csdl.computer.org /comp/proceedings/dis-rt/1997/7773/00/77730009abs.htm (223 words)

	High Level Architecture (Site not responding. Last check: 2007-11-03)
		The High Level Architecture (HLA) for simulations is a DOD-wide initiative to provide an architecture to support interoperability and reuse of simulations.
		The HLA is part of the DOD common technical framework for simulations as required in Objective 1 of the DOD Modeling and Simulation Master Plan.
		The Department of the Navy's overarching goal for the implementation of the HLA, is to enhance modeling and simulation (M&S) capabilities while making best use of current and future investment.
	nmso.navy.mil /projects/hla (90 words)

	MITRE - News and Events - MITRE Publications - The Edge - January 1998 - High Level Architecture
		The High Level Architecture (HLA), as a component of the Common Technical Framework, provides the structural basis for interoperability.
		The HLA is a way of describing the important aspects of simulation integration.
		The HLA Object Model Template makes sure that all elements are considered in an integrated federation.
	www.mitre.org /news/the_edge/january_98/fourth.html (420 words)

	Architecture and Design - Bandit-project.org
		This diagram does not explain all of the possible interactions between the components but is meant to be a high level description.
		The Use Cases will contain architecture diagrams that show which pieces it relies on and their interactions.
		Below are the links to the different component architecture pages.
	www.bandit-project.org /index.php/Architecture_and_Design (148 words)

	High-Level Design
		The program shall communicate at the level that the server communicates.
		If the program performs any slower than this modifications will be made to verify the integrity of the program and the correct communication with the server.
		Later on, it will be important also to determine when to do these higher level actions.
	pegasus.cc.ucf.edu /~kicarr/TeamPage/HighLevelDesign.html (993 words)

	High-Level Architecture Model - Updated July 24, 2002
		This topic describes the high-level architecture model for the BEA WebLogic Commerce Server and Personalization Server with Portal Framework, and Campaign Manager.
		Figure 2-1 illustrates the high-level architecture of the Personalization Server.
		Figure 2-2 illustrates the high-level architecture of the Commerce Server.
	e-docs.bea.com /wlcs/docs35/tuning/hla.htm (655 words)

	Using the High Level Architecture to Implement Selective-Fidelity
		A new and potentially high impacting expansion of distributing simulation involves tying that methodology with that of selective fidelity, a concept that allows a simulation system to modify its own level of fidelity based on what aspects of the simulation are important or interesting to a user or observer.
		Using multiple simulation systems tied together by a run-time infrastructure (RTI), the software implementation of the High Level Architecture (HLA), a selective fidelity federation can be implemented by changing ownership of simulation objects between federates, depending on what aspects of the simulation are important.
		Included in this description are explanations of the concepts of fidelity and selective fidelity, a summary of HLA and the RTI, a detailed account of the architecture necessary to implement such a scheme, and a section predicting possible applications for such an idea.
	csdl2.computer.org /comp/proceedings/anss/2004/2110/00/21100246abs.htm (288 words)

	Pitch
		HLA Training - We offer the full range from management seminars, practical hands-on courses, advanced courses, to consulting and site based start-up packages.
		Do you want to migrate a HLA 1.3 federate to HLA 1516.
		There are now two documents on the pRTI 1516 support page that show how to port a simple federate from HLA 1.3 to HLA 1516.
	www.pitch.se (351 words)

	Uml extension for high level service architecture
		Amarco as an UML extension for high level SOA analysis
		Amarco can be seen as an UML extension enabling high level service oriented analysis for information systems:
		Amarco targets high level system architecture for complex systems.
	www.sysoft-fr.com /en/amarcoGen/uml-extension.asp (318 words)

	ESA - Modelling and simulation - High Level Architecture (HLA)
		ESA - Modelling and simulation - High Level Architecture (HLA)
		We are conducting experiments as a part of our research activities to evaluate distributed simulation for the benefit of space projects.
		In doing this, a standard approach for implementation of interoperability has been selected, namely the High Level Architecture (HLA), promoted by the US DoD and which became the IEEE 1516 standard.
	www.esa.int /TEC/Modelling_and_simulation/SEM1LLVHESE_2.html (166 words)

	DiSTI - High Level Architecture Solutions (Site not responding. Last check: 2007-11-03)
		We can also provide consultants with unique HLA competences to get your project off to a fast start.
		In addition to HLA technology, we also specialize in infrastructure architecture, federation development methodologies (such as FEDEP), and HLA market strategies.
		We can also implement the HLA adaptor or gateway of your choice.
	www.simulation.com /services/hlaconsulting.html (129 words)

	IEEE OKAYS COMPUTER STANDARDS FOR FEDERATIONS IN HIGH-LEVEL ARCHITECTURE, BOUNDARY-SCAN TESTING AND POWER QUALITY DATA ...
		It has also approved the start of work on a new standard and work to begin on the revision of two existing ones.
		One of the new standards approved, IEEE 1516.3 (TM), "Recommended Practice for High Level Architecture (HLA) Federation Development and Execution Process (FEDEP)," defines the processes and procedures for developing and executing federations.
		It offers a higher-level framework into which lower-level management and systems engineering practices native to HLA user organizations can be integrated and tailored for specific uses.
	standards.ieee.org /announcements/1516311496.html (592 words)

	Flash For Learning » Blog Archive » High Level Architecture (HLA)
		The High Level Architecture is a software architecture for creating computer simulations out of component simulations, providing structure for developers to describe their simulation applications.
		Reusability and Interoperability, which should sound familiar to any OOP developer, as well as anyone involved with learning objects.
		There’s a wealth of information here to get to know HLA, but I suggest reading the notes instead of the presentations to get started.
	flashforlearning.com /2005/07/21/high-level-architecture-hla (133 words)

	Intranet Portal Guide > Before > Intranet Architecture - High level design, vendor selection
		Through platform-independent thin-client browsers, networked collaboration technologies, standard-based tools and common foundations, your intranet can become the 'glue' that thinks your legacy and enterprise investments together.
		The design inset is my own version of the architectures most commonly pedaled by the big system integrators (four of which I have worked with at one time or another).
		Visit Gartner for the latest leading-edge thought on Intranet and Portal architectures.
	www.viney.com /DFV/intranet_portal_guide/before/architecture.html (423 words)

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