Research Activities

Deutschsprachige Seiten

Johannes Lüthi, Research Activities

Project Involvement

  • PAPS : Performance Analysis of Parallel Systems, Institute of Applied Computer Science and Information Systems , University of Vienna. Feb. 1995 - January 1997.
  • Web-Based Network Management, Institut für Technische Informatik, Universität der Bundeswehr München, Dec. 1997 - April 1998.
  • Study: "Zukunftsfelder Modellbildung und Simulation" (Future Directions in Modelling and Simulation), Institut für Technik Intelligenter Systeme (ITIS e.v.), May 1998 - June 2000.
  • Study: "Leistungs-, Verfügbarkeits- und Wirtschaftlichkeitssteigerung mittels paralleler und verteilter Simulation" (Increasing Performance, Availability, and Efficiency with Parallel and Distributed Simulation), Institut für Technik Intelligenter Systeme (ITIS e.v.), July 2001-July 2002.
  • Subcontract to study: "”Theoretische, Praktische und Verfahrenstechnische Aspekte einer Architektur und Infrastruktur für verteilte Simulation in der Bw“ (Theoretical, Practical, and technical aspects of an architecture and infrastructure for distributed simulation in the German armed forces), main contractor: Institut für Technik Intelligenter Systeme (ITIS e.v.), subcontractor: FHS KufsteinTirol. Co-founded by the Tirolean Science Foundation. Ongoing since October 2003.

Theses

  1. Distributed Discrete Event Simulation: Optimistic Protocols with Probabilistic Time Window Adaptation. Diploma Thesis (in Applied Mathematics), November 1994, University of Vienna. 
    Download (summary+references): PS-file: uncompressed -2.3MB, compressed (434kB).
  2. J. Lüthi: Analysis of Queueing Network Models for Computer and Communication Systems with Workload Uncertainties and Variabilities. PhD Thesis, University of Vienna, July 1997.
    Download    : Abstract: English, German . PS-file: uncompressed -20MB, compressed -2MB (gzip).

Edited Publications

  1. R. German, J. Lüthi, M. Telek (eds.): Proc. Fifth International Workshop on Performability Modeling of Computer and Communication Systems (PMCCS 5), Vol. 34, No. 13 of "Arbeitsberichte des Instituts für Informatik der Universität Erlangen-Nürnberg", September 2001.

Journal Publications

  1. J. Lüthi, S. Majumdar, G. Kotsis, and G. Haring: Performance Bounds for Distributed Systems with Workload Variabilities & Uncertainties. In: Parallel Computing, Special Issue - Distributed and Parallel Systems: Environments and Tools, North Holland, Vol. 22, No. 13, pp. 1789-1806, February 1997.
    Download    : Abstract. Pre-Print: uncompressed -940kB, compressed -180kB (gzip).
  2. J. Lüthi, G. Haring: Mean Value Analysis for Queueing Network Models with Intervals as Input Parameters. (Revised version of technical report TR-095101). In: Performance Evaluation, North Holland, Vol. 32, No. 3, pp. 185-215, April 1998.
    Download    : Abstract. Pre-Print: uncompressed -2.4MB, compressed -467kB (gzip).
  3. J. Lüthi, C.M. Lladó: Interval Parameters for Capturing Uncertainties in an EJB Performance Model. In: ACM Performance Evaluation Review, Vol. 29, No.1, Special Issue "Joint International Conference on Measurement & Modeling of Computer Systems (SIGMETRICS 2001/PERFORMANCE 2001, Camebridge, MA, USA, June 16-20, 2001)", June 2001.
  4. J. Lüthi, C.M. Lladó: Splitting Techniques for Interval Parameters and their Application to Performance Models. Performance Evaluation, North Holland, Vol. 51, No. 1, pp. 47-74, January 2003.

Book Contributions

  1. S. Majumdar, J. Lüthi, G. Haring, and R. Ramadoss: Characterization and Analysis of Software and Computer Systems with Uncertainties and Variabilities. In: R. Dumke, C. Rautenstrauch, A. Schmietendorf, and A. Scholz (Eds.), Performance Engineering - State of the Art and Current Trends, LNCS 2047, pp. 202-221, Springer-Verlag, Berlin et al., May 2001.
  2. J. Lüthi: Histogram-Based Characterization of Workload Parameters and its Consequences on Model Analysis. In: G. Haring, G. Kotsis, S.V. Raghavan (Eds.), Workload Characterization in High-Performance Computing Environments, pp. 33-56, Schriftenreihe der Österreichischen Computer Gesellschaft, Vol. 114, books@ocg.at, Vienna, 2001.

Refereed Conference Publications

  1. A. Ferscha, J. Lüthi : Estimating Rollback Overhead for Optimism Control in Time Warp . In: Proceedings of the 28th Annual Simulation Symposium (Phoenix, Arizona, April 9-13, 1995), pp. 2-12, IEEE Computer Society Press, April 1995.
    Download: Abstract. PostScript-file: uncompressed -3MB, compressed -400kB (gzip).
  2. J. Lüthi, S. Majumdar, and G. Haring: Mean Value Analysis for Computer Systems with Variabilities in Workload . In: Proceedings of the IEEE International Computer Performance & Dependability Symposium (IPDS'96, Urbana-Champaign, IL, USA, September 4-6, 1996), pp. 32-41, IEEE Computer Society Press, September 1996.
    Download: Abstract. PostScript-file: uncompressed -827kB, compressed -144kB (gzip).
  3. J. Lüthi, G. Kotsis, S. Majumdar, and G. Haring: Bounds-Based Performance Analysis for Distributed Systems with Variabilities and Uncertainties in Workload. In: Proceedings of the 1st Austrian-Hungarian Workshop on Distributed and Parallel Systems (DAPSYS'96 , Miskolc, Hungary, October 2-4, 1996), pp. 51-58, Hungarian Academy of Sciences Report KFKI-1996-09/M,N, October 1996.
    Download: Abstract. PostScript-file: uncompressed -813kB, compressed -173kB (gzip).
  4. J. Lüthi: Interval Matrices for the Bottleneck Analysis of Queueing Network Models with Histogram-Based Parameters. In: Proc. IEEE Int. Computer Performance & Dependability Symposium (IPDS'98, Durham, NC, USA, September 7-9, 1998), pp. 142-151, IEEE Computer Society Press, September 1998
    Download: Abstract . PostScript-file: uncompressed -631kB, compressed -142kB (gzip)
  5. J. Lüthi, C. Berchtold: Concepts for Dependable Distributed Discrete Event Simulation . In: R. Van Landeghem (Ed.), Proc. Int. European Simulation Multi-Conference (ESM 2000, Ghent, Belgium, May 23-26, 2000), pp. 59-66, SCS, May 2000.Awarded "Best Paper Award of the 2000 ESM Conference"
    Download: Abstract . PostScript-file: uncompressed -605kB, compressed -190kB (gzip)
  6. J. Lüthi, S. Großmann: The Resource Sharing System: Dynamic Federate Mapping for HLA-based Distributed Simulation. In: Proc. 15th Workshop on Parallel and Distributed Simulation (PADS 2001, Lake Arrowhead, CA, USA, May 15-18, 2001), pp. 91-98, IEEE Computer Society, May 2001.
    Download: Abstract. PostScript-file: uncompressed -1.4MB, compressed -138kB (gzip)
  7. J. Lüthi, D. Brade, A. Lehmann: A Modeling Concept for the Mastering of Systems Complexity . In: Proc. Int. European Simulation Multi-Conference (ESM 2001, Prague, Czech Republic, June 6-9, 2001), pp. 43-47, SCS, June 2001.
  8. J. Lüthi, G. Anders: HLA-based Distributed Simulation of Queueing Network Models. In: Proc. Int. European Simulation Multi-Conference (ESM 2001, Prague, Czech Republic, June 6-9, 2001), pp. 560-564, SCS, June 2001.
  9. A. Schreiber, J. Lüthi: A Simulation Framework for the Performance Evaluation of Cache Hierarchies . In: Proc. 11th GI/ITG Conference on Measuring, Modelling and Evaluation of Computer and Communication Systems (MMB 2001, Aachen, Germany, September 11-14, 2001), pp. 73-88, VDE Verlag, September 2001.
  10. C.M. Lladó, J. Lüthi, P.G. Harrison Studying Sensitivities of an EJB Performance Model. In: Proc. 10th IEEE/ACM International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS 2002, Fort Worth, TX, USA,  October 12-16, 2002), pp. 277-280, IEEE Computer Society Press, 2002.
  11. Z. Xu, J. Lüthi, A. Lehmann: Predicting Software Performance Based on UML Models During the Unified Software Development Process. In: Proc. Workshop on Critical Systems Development with UML (part of the 6th International Conference on the Unified Modeling Language and its applications, San Francisco, CA, USA, October 20-24, 2003), 2003.
  12. J. Lüthi, S. Großmann: FT-RSS: A Flexible Framework for Fault Tolerant HLA Federations. In: Proc. International Conference on Computational Science 2004 (ICCS 2004, Krakow, Poland, June 6-9, 2004), LNCS 3038, pp. 865-872, Springer-Verlag, June 2004.
  13. M. Heisel, J. Lüthi, A. Uhrmacher, E. Valentin. A Description Structure for Simulation Model Components. In: Proc. Summer Computer Simulation Conference (SCSC 2004, San Jose, CA, USA, July 25-29, 2004), 2004.
  14. T. Kiesling, J. Lüthi. Towards Time-Parallel Road Traffic Simulation. In: Proc. 19th Workshop on Principles of Advanced and Distributed Simulation (PADS 2005, Monterey, CA, USA, June 1-3, 2005), pp. 7-15, IEEE Computer Society Press, 2005.
  15. T. Kiesling, J. Lüthi, R. El Abdouni Khayari. Bias in Parallel and Distributed Simulation Systems. In: Proc. 2005 Winter Simulation Conference (WSC 2005, Orlando, FL, USA, Dec. 4-7, 2005).

Semi-refereed Conference/Workshop Publications

  1. J. Lüthi, G. Haring : Analysis of Computer and Communication Systems with Variabilities and Uncertainties in Workload. In: Extended Abstracts Third International Workshop on Performability Modeling of Computer and Communication Systems (PMCCS 3, Bloomingdale, IL, USA, September 7-8, 1996), pp. 85-89, September 1996.
    Download: Abstract. PostScript-file: uncompressed -740kB, compressed -144kB (gzip).
  2. J. Lüthi, G. Haring: Bottleneck Analysis for Computer and Communication Systems with Workload Variabilities & Uncertainties. In: I. Troch and F. Breitenecker (eds.), Proceedings of 2nd International Symposium on Mathematical Modelling (2nd MATHMOD VIENNA, Technical University Vienna, Austria, February 5-7, 1997), pp. 525-534, ARGESIM Report No.11, ISBN 3-901608-11-7, February 1997.
    Download: Abstract. PostScript-file: uncompressed -150kB, compressed -54kB (gzip).
  3. J. Lüthi, G. Haring: Fuzzy Queueing Network Models of Computing Systems. In: Proceedings of the 13th UK Performance Engineering Workshop, Ilkley, UK, Edinburgh University Press, July 1997.
    Download: Abstract. PostScript-file: uncompressed -813kB, compressed -188kB (gzip).
  4. J. Lüthi : Histogram-Based Workload Characterization and its Consequences on Model Analysis. In: Proc. MASCOTS'98 Workshop on Workload Characterization in High-Performance Computing Environments, Montreal, Canada, July 19, 1998, pp. 1/52-1/64, July 1998.
    Download: Abstract. PostScript-file: uncompressed -640kB, compressed -129kB (gzip)
  5. J. Lüthi: Simultaneous Performance and Sensitivity Analyses with Extended MVA Algorithms. In: Extended Abtracts Fourth International Workshop on Performability Modeling of Computer and Communication Systems (PMCCS 4, Williamsburg, VA, USA, September 4-6, 1998), pp. 53-57, September 1998.
    Download: Abstract. PostScript-file: uncompressed -817kB, compressed -127kB (gzip)
  6. J. Lüthi, C.M. Lladó: Sensitivity Analysis of an EJB Performance Model using Interval Parameters . In: Proc. 2. Workshop Performance Engineering in der Softwareentwicklung (PE 2001, München, Germany, April 18, 2001), pp. 1-5, April 2001.
    Download: Abstract. PostScript-file: uncompressed -836kB, compressed -220kB (gzip)
  7. J. Lüthi: Simulation User Driving License? ...what your mother never told you about computer simulation (in German). In: Proc. 2. Fernausbildungskongress der Bundeswehr (Hamburg, Germany, September 20-22.September 2005), in print.

Technical Reports

  1. J. Lüthi, G. Haring: Mean Value Analysis for Queueing Network Models with Intervals as Input Parameters. Technical Report No. TR-950101, Institute of Applied Computer Science and Information Systems, University of Vienna, Lenaugasse 2/8, 1080 Wien, Austria. July 1995.
    Download: Abstract. PostScript-file: uncompressed -4.9MB, compressed -812kB (gzip).
  2. S. Majumdar, J. Lüthi, and G. Haring: Histogram-Based Performance Analysis for Computer Systems with Variabilities or Uncertainties in Workload. Research Report SCE-95-22, Department of Systems and Computer Engineering, Carleton University, Canada, November 1995.
    Download: Abstract. PostScript-file: uncompressed -2.8MB, compressed -348kB (gzip).
  3. J. Lüthi, S. Majumdar, and G. Haring: Mean Value Analysis for Computer Systems with Variabilities in Workload . Technical Report No. TR-96101, Institute of Applied Computer Science and Information Systems, University of Vienna, Lenaugasse 2/8, 1080 Wien, Austria. February 1996.
    Download: Abstract. PostScript-file: uncompressed -1MB, compressed -161kB (gzip).
  4. J. Lüthi, G. Kotsis, S. Majumdar, and G. Haring: Performance Analysis using Queueing Network Models with Variabilities and Uncertainties in Workload. Technical Report No. TR-96102, Institute of Applied Computer Science and Information Systems, University of Vienna, Lenaugasse 2/8, 1080 Wien, Austria. June 1996.
    Download: Abstract. PostScript-file: uncompressed -569kB, compressed -132kB (gzip).
  5. A. Lehmann, W.J. Liebl, S. Noureddine, J. Lüthi, G. Bogler: Web-based Cooperative Service and Network Management , "CSNM"-Project Milestone 1, Institut für Technische Informatik, Universität der Bundeswehr München, April 1998.
  6. A. Lehmann, J. Lüthi, C. Berchtold, D. Brade, A. Köster: (in German) Zukunftsfelder der Modellbildung und Simulation (ZMS) - Zwischenbericht zur gleichnamigen Studie, Institut für Technik Intelligenter Systeme (ITIS e.V.) an der Universität der Bundeswehr München, in German, May 1999.
  7. J. Lüthi: (in German) Erhöhung der Zuverlässigkeit in verteilter Simulation . In: Beiträge zur Studie „GE-RTI“, Institut für Technik Intelligenter Systeme (ITIS e.V.) an der Universität der Bundeswehr München, March 2000.
  8. A. Lehmann, J. Lüthi, C. Berchtold, D. Brade, A. Köster: (in German) Zukunftsfelder der Modellbildung und Simulation (ZMS) - Abschlußbericht zur gleichnamigen Studie, Institut für Technik Intelligenter Systeme (ITIS e.V.) an der Universität der Bundeswehr München, in German, June 2000.
  9. J. Lüthi, C.M. Lladó: Splitting Techniques for Interval Parameters in Performance Models . Technischer Bericht (Technical Report) 2000-07, Fakultät für Informatik, Universität der Bundeswehr München, D-85577 Neubiberg, Germany, December 2000.
    Download: Abstract. PostScript-file: uncompressed -3.5MB, compressed -967kB (gzip).
  10. J. Lüthi, C.M. Lladó: Interval Parameters for Capturing Uncertainties in an EJB Performance Model. Technischer Bericht (Technical Report) 2000-08, Fakultät für Informatik, Universität der Bundeswehr München, D-85577 Neubiberg, Germany, December 2000.
    Download: Abstract. PostScript-file: uncompressed -2MB, compressed -467kB (gzip).
  11. S. Majumdar, J. Lüthi, R. Ramadoss, and G. Haring: Performance Analysis of Computing Systems with Interval Parameters. Technical Report, Department of Systems and Computer Engineering, Carleton University, Ottawa, Canada K1S 5B6, 2001.
  12. A. Lehmann, J. Lüthi, S. Bel Haj Saad, C. Berchtold, S. Großmann: (in German) Leistungs -, Verfügbarkeits- und Wirtschaftlichkeitssteigerung mittels Paralleler und Verteilter Simulation. Zwischenbericht zur gleichnamigen Studie, Institut für Technik Intelligenter Systeme (ITIS e.V.) an der Universität der Bundeswehr München, in German, January 2002.
  13. A. Lehmann, J. Lüthi, G. Anders, S. Bel Haj Saad, C. Berchtold, S. Großmann, T. Krieger: (in German) Leistungs -, Verfügbarkeits- und Wirtschaftlichkeitssteigerung mittels Paralleler und Verteilter Simulation. Abschlussbericht zur gleichnamigen Studie, Institut für Technik Intelligenter Systeme (ITIS e.V.) an der Universität der Bundeswehr München, in German, July 2002.
  14. J. Lüthi: (in German) Framework für die Fehlertolerante Verteilte Simulation mit der HLA. Short paper to the talk presented at 2. ITIS Workshop "Perspektiven der Modellbildung und Simulation", Institut für Technik Intelligenter Systeme (ITIS e.V.) an der Universität der Bundeswehr München, October 2002.

Presentations

  1. Estimating Rollback Overhead for Optimism Control in Time Warp.
    28th Annual Simulation Symposium, April 10, 1995, Phoenix, Arizona, USA.
  2. Performance Analysis of Computer Systems with Uncertainties and Variabilities in Workload Using Interval-Based Queueing Networks.
    Institut für Mathematik, Universität Wien, May 8, 1996.
  3. Mean Value Analysis for Computer Systems with Variabilities in Workload.
    2nd IEEE International Computer Performance & Dependability Symposium (IPDS '96), September 4, 1996, Urbana-Champaign, IL, USA.
    Download slides: Postscript-file: uncompressed -3.8MB, compressed -414kB (gzip).
  4. Analysis of Computer and Communication Systems with Variabilities and Uncertainties in Workload.
    Third International Workshop on Performability Modeling of Computer and Communication Systems (PMCCS 3), September 8, 1996, Bloomingdale, IL, USA.
  5. Bounds-Based Performance Analysis of Distributed Systems with Variabilities and Uncertainties in Workload.
    1st Austrian-Hungarian Workshop on Distributed and Parallel Systems (DAPSYS '96), October 2, 1996, Miskolc, Hungary.
  6. Bottleneck Analysis for Computer and Communication Systems with Workload Variabilities & Uncertainties.
    2nd International Symposium on Mathematical Modelling (2nd MATHMOD VIENNA), February 5, 1997, Technical University Vienna, Austria.
  7. Fuzzy Queueing Network Models of Computing Systems.
    13th United Kingdom Workshop on Performance Engineering of Computer and Telecommunication Systems (13th UKPEW), July 24, 1997, Ilkley, UK.
    Download slides: Postscript-file: uncompressed -486kB, compressed -116kB (gzip).
  8. Histogram-Based Workload Characterization and its Consequences on Model Analysis.
    MASCOTS '98 Workshop on Workload Characterization in High-Performance Computing Environments , July 19, 1998, Montreal, Canada.
    Download slides: Postscript-file: uncompressed -8.4MB, compressed -725kB (gzip).
  9. Simultaneous Performance and Sensitivity Analyses with Extended MVA Algorithms.
    Fourth International Workshop on Performability Modeling of Computer and Communication Systems (PMCCS 4), September 6, 1998, Williamsburg, VA, USA.
    Download slides: Postscript-file: uncompressed -2.9MB, compressed -232kB (gzip).
  10. Interval Matrices for the Bottleneck Analysis of Queueing Network Models with Histogram-Based Parameters.
    IEEE International Computer Performance & Dependability Symposium (IPDS '98), September 8, 1998, Durham, NC, USA.
    Download slides: Postscript-file: uncompressed -3.8MB, compressed -436kB (gzip).
  11. Operations Research Models.
    Presentation given during the visit of a delegation from the Slovenian DoD at "Amt für Studien und Übungen der Bundeswehr", April 8, 1999, Ottobrunn, Germany.
    Download slides: MS Powerpoint-file: uncompressed -563kB, compressed -350kB (gzip).
  12. Interval Parameters in Analytical Performance Models.
    Department of Computing, Imperial College of Science, Technology and Medicine, September 11, 2000, London, UK.
    Download slides: MS Powerpoint-file: uncompressed -2.8MB, compressed -2.1MB (gzip)
  13. The Resource Sharing System: Dynamic Federate Mapping for HLA-based Distributed Simulation.
    15th Workshop on Parallel and Distributed Simulation (PADS 2001), May 16, 2001, Lake Arrowhead, CA, USA.
    Download slides: MS Powerpoint-file: uncompressed -1.6MB, compressed -1.2MB (gzip)
  14. A Modeling Concept for the Mastering of Systems Complexity.
    15th Int. European Simulation Multi-Conference (ESM 2001), June 7, Prague, Czech Republic.
    Download slides: MS Powerpoint-file: uncompressed -2.1MB, compressed -1.7MB (gzip)
  15. HLA-based Distributed Simulation of Queueing Network Models.
    15th Int. European Simulation Multi-Conference (ESM 2001), June 7, Prague, Czech Republic.
    Download slides: MS Powerpoint-file: uncompressed -1.6MB, compressed -1.3MB (gzip)
  16. Interval Parameters for Capturing Uncertainties in an EJB Performance Model.
    Joint International Conference on Measurement & Modeling of Computer Systems (SIGMETRICS 2001/PERFORMANCE 2001), June 18, 2001, Camebridge, MA, USA.
    Download slides: MS Powerpoint-file: uncompressed -1.6MB, compressed -1.3MB (gzip)
  17. A Simulation Framework for the Performance Evaluation of Cache Hierarchies.
    11th GI/ITG Conference on Measuring, Modelling and Evaluation of Computer and Communication Systems (MMB 2001), September 12, 2001, Aachen, Germany.
  18. A Conceptual Framework for Fault Tolerant HLA Simulations. FOI, Swedish Defence Research Agency, May 31, 2002, Stockholm, Sweden.
  19. Framework für die Fehlertolerante Verteilte Simulation mit der HLA. (in German)
    2. ITIS Workshop "Perspektiven der Modellbildung und Simulation", October 10, 2002, Neubiberg, Deutschland.
  20. FT-RSS: A Flexible Framework for Fault Tolerant HLA Federations.
    International Conference on Computational Science 2004 (ICCS 2004), Workshop on HLA-Based Distributed Simulation on the Grid. June 7, 2004, Krakow, Poland.
  21. Simulation User Driving License ...what your mother never told you about computer simulation.
    2. Fernausbildungskongress der Bundeswehr, Workshop Simulation in Ausbildungsszenarien, September 20, 2005, Hamburg, Germany.
  22. Bias in Parallel and Distributed Simulation Systems.
    2005 Winter Simulation Conference (WSC 2005), 6. Dezember 2005, Orlando, FL, USA.

Tutorials

  1. Parameter Uncertainites in Performance Models.
    2001 Aachen International Multiconference on Measurement, Modelling, and Evaluation of Computer-Communication Systems , September 11, 2001, Aachen, Germany.

Refereeing Activities

  • Journals
    • Journal of Systems Architecture
    • SCS Transactions on Simulation
    • ACM Transactions on Software Engineering
    • IEEE Transactions on Reliability
    • Concurrency and Computation: Practice and Experience

Conference/Workshop Organization


Last Update: January 30, 2006.
Please report comments (especially out-of-date links) to me . Thanks!
  FHS KufsteinTirol, Andreas Hofer Straße 7 - A-6330 Kufstein
Tel. +43 / 5372 / 71819, Fax +43 / 5372 / 71819-104
e-mail: info@fh-kufstein.ac.at, www.fh-kufstein.ac.at