Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Consistency management in collaborative modelling and simulation
KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
2005 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

The aim of this thesis is to exploit the technological capabilities of computer supported collaborative work (CSCW) in the field of collaborative Modelling and Simulation (M&S). The thesis focuses on addressing two main problems: (i) providing flexible means of consistency management in collaborative M&S, and (ii) the ability of providing platform and application independent services for collaborative M&S.

In this work, some CSCW technologies and how some of the concepts can be incorporated in a distributed collaborative M&S environment, have been studied. An environment for component based simulation development and visualization, which provides support for collaborative M&S, has been designed. Some consistency policies that can be used in conjunction with distributed simulation and the High Level Architecture (HLA) have been investigated. Furthermore, the efficient utilization of HLA and XML in combination, as the foundation of a CSCW infrastructure has been proved. Two consistency policies were implemented utilizing HLA, a strict and an optimistic, in the distributed collaborative environment. Their performance was compared to the performance of a totally relaxed policy, in various collaboration situations.

Place, publisher, year, edition, pages
Stockholm: KTH , 2005. , 136 p.
Series
Trita-IMIT. LECS, ISSN 1651-4076 ; 2005:11
Keyword [en]
CSCW, collaboration, HLA, distributed simulation, consistency management, CSCW services, modelling and simulation
National Category
Information Science
Identifiers
URN: urn:nbn:se:kth:diva-571OAI: oai:DiVA.org:kth-571DiVA: diva2:14467
Presentation
2005-12-02, sal Gemini, IMIT, Forum, Isafjordsgatan 39, Kist, Stockholm, 13:00
Supervisors
Note
QC 20101222Available from: 2005-12-28 Created: 2005-12-28 Last updated: 2010-12-22Bibliographically approved
List of papers
1. A Web-based Environment for building Distributed Simulations.
Open this publication in new window or tab >>A Web-based Environment for building Distributed Simulations.
2002 (English)In: Proceedings of the European Simulation Interoperability Workshop, London, Great Britain,June 2002, 2002Conference paper, Published paper (Other academic)
Abstract [en]

Internet communication in general and the World Wide Web specifically have beenrevolutionizing the computer industry. It has affected the way computer systems have beendesigned, developed and executed. Web-based simulation is a relatively new topic within thefield of modelling and simulation (M&S), which represents a connection between the webtechnologyand M&S. Although the discipline is young it has the potential to fundamentallychange the simulation modelling methodology.An ongoing project within the Swedish Defense Research Agency (FOI) is investigating thepotentials of web-based simulation by studying the possibilities, requirements and feasibility ofdeveloping methodologies for building web-based distributed simulations, e.g. HLA17federations. In order to achieve the above goal an environment has been designed and partiallydeveloped for collaboratively building distributed simulations, using a standard web-browser onthe client side. One key requirement for the environment has been the ability to buildcomponent-based simulations with a hierarchical structure.In this paper we will present our initial results and findings when developing our environment,present different techniques and some of our implementations, based on HLA standard andcontinue with a discussion on how to construct federations in a hierarchical fashion. We willdiscuss how HLA federations can be integrated with the web technology, without burdening theclient with heavy calculations, often associated with execution of simulations. We will alsodiscuss the component-based development approach as a quick and cost effective method forbuilding software systems and how it could be used with web-based simulations.

National Category
Information Science
Identifiers
urn:nbn:se:kth:diva-27774 (URN)
Note
QC 20101222Available from: 2010-12-22 Created: 2010-12-22 Last updated: 2010-12-22Bibliographically approved
2. Collaborative Modeling and Simulation in a Distributed Environment.
Open this publication in new window or tab >>Collaborative Modeling and Simulation in a Distributed Environment.
2003 (English)Conference paper, Published paper (Other academic)
Abstract [en]

Computer-based collaboration is an issue of increasing importance within the community of computer science. The advantages of the subject are many and ascribe to several different areas.The foremost purpose of computer-based collaboration is to promote the overcoming of distances between organisations and people. This advantage could also be of considerable use within thecommunity of Modelling and Simulation (M&S) to improve quality of work in the M&S processes, and to increase efficiency. Such collaboration may be beneficial in many contexts such as distance education, distance training, and distance team work.At the Swedish Defence Research Agency (FOI), we are investigating collaborative M&S indistributed environments. A prototype for collaborative modelling has been developed, in which users may collaboratively develop a simulation model. The collaborative applications, and the synchronization of the cooperative work, are managed in a distributed way, based on Peer-to-Peer technology. For this purpose the JXTA P2P framework was chosen. The work hasexposed some challenges for collaborative M&S, better understanding of computer collaboration, and identification of suitable techniques.This paper presents the collaborative M&S prototype developed so far, and highlights advantages and disadvantages with techniques chosen for the implementation. It also discusses some challenges, lessons learned and experience gained from the use of Peer-to-Peer technology in this specific area.

National Category
Information Science
Identifiers
urn:nbn:se:kth:diva-27775 (URN)
Conference
The European Simulation Interoperability Workshop, Stockholm, Sweden, June 2003
Note
QC 20101222Available from: 2010-12-22 Created: 2010-12-22 Last updated: 2010-12-22Bibliographically approved
3. NetSim: A Network-based Environment for Modelling and Simulation
Open this publication in new window or tab >>NetSim: A Network-based Environment for Modelling and Simulation
2004 (English)In: Proceedings of SimSafe Conference, 2004Conference paper, Published paper (Refereed)
Abstract [en]

Modelling and Simulation (M&S) is a powerful tool that is used to support training and analysis of military operations, development of military concepts and gradually, it is becoming an integral part of modern C3I systems. As the web has evolved, new ways of carrying out modelling and simulation and realizing C3I systems have emerged. These achievements address some of the research issues considered vital for future development of the M&S/C3I domain. Firstly, web related technologies provide means of overcoming the interoperability barriers, for example through standardized data exchange formats (such as XML), platform independent software (for example Java) and shared knowledge of a domain (semantics). Secondly, networked environments offer ways of setting up virtual organisations, sharing common goals and interests, to efficiently collaborate in problem solving. Finally, computer networks promote efficient sharing of resources, which for example could increase the reuse of existing models or utilize idle processing capacity of computers.

At the Swedish Defence Research Agency (FOI) there is ongoing research, targeting the role of network/web based technologies in M&S, to support defence communities in their work. Our vision comprises an environment supporting the entire M&S-process, including conceptualization, scenario definition, design, development and execution. All these tasks should be maintained by a framework for collaboration, which lets users; developers, analysts, administrators etc, jointly work on a project. During the first phase of this research focus has been on efficient resource sharing and means of collaboration. Through experimental research and implementation of a prototype (NetSim), methods and techniques have been identified to form a framework for collaborative work, resource management and distributed execution.

Following current trends within development of networked applications, decentralized (Peer-to-Peer) solutions were of primary focus when implementing the prototype. Based on the open source Peer-to-Peer platform JXTA, two distinct components of our envisioned system were implemented, namely; a decentralized resource management system deploying a network of workstation for execution of HLA federations and a collaborative environment for joint modelling of federations. Our results show that the utilization of Peer-to-Peer concepts for resource sharing and collaboration are favourable in terms of scalability, robustness and fault tolerance. The technology allows formation of virtual organisations without the need of intermediate resources like centralized and powerful servers. However, some aspects of our implementation temporarily rely on central control, thereby diminishing the benefits of the Peer-to-Peer paradigm. Future research will therefore address distributed algorithms for synchronisation of collaborative work and a more flexible and extendable approach to resource management. Furthermore, as many studies have pointed out before, one of the great challenges of any type of Peer-to-Peer system is discovery and matching of resources. This is an area that deserves great attention when planning for the next generation C3I/M&S tools.

National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-8512 (URN)
Conference
NATO Modeling and Simulation Group, Symposium on C3I and M&S Interoperability, Antalya, Turkey, October 2003.
Note
QC 20100830Available from: 2008-05-26 Created: 2008-05-26 Last updated: 2010-12-22Bibliographically approved
4. Building a CSCW infrastructure utilizing an M&S architecture and XML
Open this publication in new window or tab >>Building a CSCW infrastructure utilizing an M&S architecture and XML
2005 (English)In: Lecture Notes in Computer Science, ISSN 0302-9743, E-ISSN 1611-3349, Vol. 3675, 1-13 p.Article in journal (Refereed) Published
Abstract [en]

CSCW applications provide virtual spaces for human-human cooperation. Within Modelling and-Simulation (M&S), CSCW support is highly beneficial but, as in most single-user applications, not natively provided. External support, such as infrastructures for creating or adapting applications for collaborative work, is generally missing in the CSCW community. At the Swedish Defence Research Agency we study the possibilities of defence CSCW, for the primary intention of collaborative M&S. Since most of our M&S, complies with the HLA (a distributed simulation architecture), HLA appeared as a candidate for building a CSCW infrastructure upon. Thus We have designed and developed a prototype of a CSCW infrastructure, based on a combination of HLA and XML. The goal is to provide a foundation for developing CSCW applications, and for adapting existing applications to collaborative work. This paper presents the design and development, and experiments conducted for verifying utilization of HLA and XML for the purpose.

Keyword
Computer applications, Computer supported cooperative work, Electronic communities, Program compilers, XML, CSCW applications, CSCW community, Simulation architecture
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-8513 (URN)10.1007/11555223_1 (DOI)000233549700001 ()2-s2.0-33646018668 (Scopus ID)
Note
QC 20100830Available from: 2008-05-26 Created: 2008-05-26 Last updated: 2011-10-12Bibliographically approved
5. Consistency overhead using HLA for collaborative work
Open this publication in new window or tab >>Consistency overhead using HLA for collaborative work
2005 (English)In: Ninth IEEE International Symposium on Distributed Simulation and Real-Time Applications, Proceedings, LOS ALAMITOS: IEEE COMPUTER SOC , 2005, 7-15 p.Conference paper, Published paper (Refereed)
Abstract [en]

CSCW (Computer Supported Cooperative Work) has been around for many years. However, despite growing use of CSCW, general infrastructures that support it are few, and seldom provide data consistency management. A question at issue is how to easily provide different consistency policies for CSCW applications. In a modeling and simulation project at the Swedish Defense Research Agency we have evaluated technologies for developing a CSCW infrastructure. A frequently used distributed simulation architecture the HLA, appeared as a candidate for beneficially providing CSCW services. Hence we have investigated the use of HLA for the purpose, with successful result. This paper presents some of the outcome, and the experiences from adapting an application to CSCW utilizing HLA. It presents performance experiments for evaluation of three consistency policies for CSCW using HLA, conclusions, future work and some recommendations.

Place, publisher, year, edition, pages
LOS ALAMITOS: IEEE COMPUTER SOC, 2005
Series
IEEE/ACM International Symposium on Distributed Simulation and Real-Time Applications, ISSN 1550-6525
National Category
Information Science
Identifiers
urn:nbn:se:kth:diva-27777 (URN)10.1109/DISTRA.2005.14 (DOI)000234268900002 ()2-s2.0-31344460323 (Scopus ID)0-7695-2462-1 (ISBN)
Conference
9th IEEE International Symposium on Distributed Simulation and Real-Time Applications (DS-RT 2005) Montreal, CANADA, OCT 10-12, 2005
Note
QC 20101222Available from: 2010-12-22 Created: 2010-12-22 Last updated: 2010-12-22Bibliographically approved

Open Access in DiVA

fulltext(2705 kB)1312 downloads
File information
File name FULLTEXT01.pdfFile size 2705 kBChecksum MD5
c7a857715b4dae0dbc97884a0f5243aefc764ffabe611d98f39899c952982f358e4f3585
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Ulriksson, Jenny
By organisation
Microelectronics and Information Technology, IMIT
Information Science

Search outside of DiVA

GoogleGoogle Scholar
Total: 1312 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 715 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf