Jan Janssen

Publicaties

De onderstaande publicaties kwamen tot stand tijdens mijn onderzoeksloopbaan, waarin ik werkte rond 2 vrij uiteenlopende onderwerpen.

Van 09/1992 tot 08/1998 werkte ik als assistent/postdoctoraal onderzoeker aan de Katholieke Universiteit Leuven, Departement Computerwetenschappen, Onderzoeksgroep Technisch-Wetenschappelijk Rekenen rond golfvormrelaxatiemethoden voor differentiaalvergelijkingen. Contacteer Stefan Vandewalle voor meer informatie.

Daarna werkte ik 4 jaar (tot midden 2002) als onderzoeksingenieur bij Alcatel Bell in het Corporate Research Centre (later de Network Strategy Group) rond de performantie van voice (en video) over pakketgebaseerde netwerken. Contacteer Danny De Vleeschauwer indien je hier meer informatie over wenst.

1994

[1] J. Janssen and S. Vandewalle, "Multigrid waveform relaxation on spatial finite-element meshes", Contributions to multigrid (A selection of contributions to the 4th European Multigrid Conference, Amsterdam, The Netherlands, 6-9 July 1993), CWI Tracts, Vol. 103, pp. 75-86, 1994. (pdf)

1996

[2] J. Janssen and S. Vandewalle, "Convolution SOR waveform relaxation on spatial finite-element meshes", ICIAM/GAMM 95: Numerical Analysis, Scientific Computing, Computer Science, Hamburg, Germany, 3-7 July 1995, Zeitschrift für Angewandte Mathematik und Mechanik, Vol. 76, Supplement 1, pp. 19-22, 1996. (pdf)

[3] J. Janssen and S. Vandewalle, "Multigrid waveform relaxation on spatial finite-element meshes: the discrete-time case", SIAM Journal on Scientific Computing, Vol. 17, Number 1, pp. 133-155, January 1996. (pdf)

[4] J. Janssen and S. Vandewalle, "Multigrid waveform relaxation on spatial finite-element meshes: the continuous-time case", SIAM Journal on Numerical Analysis, Vol. 33, Number 2, pp. 456-474, April 1996. (pdf)

1997

[5] M. Hu, K. Jackson, J. Janssen and S. Vandewalle, "Remarks on the optimal convolutoin kernel for CSOR waveform relaxation", Advances in Computational Mathematics, Vol. 7, Number 1-2, pp. 135-156, 1997. (pdf)

[6] J. Janssen and S. Vandewalle, "On SOR waveform relaxation methods", SIAM Journal on Numerical Analysis, Vol. 34, Number 6, pp. 2456-2481, December 1997. (pdf)

[7] J. Janssen, "Acceleration of waveform relaxation methods for linear ordinary and partial differential equations", PhD-thesis, Katholieke Universiteit Leuven, Belgium, December 1997. (pdf)

1999

[8] D. De Vleeschauwer, J. Janssen and G.H. Petit, "Voice over IP in access networks", Proceedings of the 7th IFIP Workshop on Performance Modelling and Evaluation of ATM & IP Networks, Antwerp, Belgium, 28-30 June 1999. (pdf)

[9] D. De Vleeschauwer, J. Janssen and G.H. Petit, "Delay bounds for low bit rate voice transport over IP networks", Proceedings of the SPIE Conference on Performance and Control of Network Systems III, Vol. 3841, pp. 40-48, Boston (MA), USA, 20-21 September 1999. (pdf)

[10] J. Janssen, R. Windey, D. De Vleeschauwer, G.H. Petit and J.-M. Leroy, "Maximum delay bounds for voice transported over satellite Internet access networks", Proceedings of the 4th International IEEE Workshop on Satellite-Based Information Services (WOSBIS'99), pp. 48-55, Rio de Janeiro, Brazil, 8 December 1999. (pdf)

2000

[11] D. De Vleeschauwer, J. Janssen, G.H. Petit and F. Poppe, "Quality bounds for packetized voice transport", Alcatel Telecommunications Review, pp. 19-24, 1st Quarter 2000. (pdf)

[12] J. Janssen, D. De Vleeschauwer and G.H. Petit, "Delay and distortion bounds for packetized voice calls of traditional PSTN quality", Proceedings of the 1st IP Telephony Workshop (IPTel 2000), GMD Report 95, pp. 105-110, Berlin, Germany, 12-13 April 2000. (pdf)

[13] D. De Vleeschauwer, J. Janssen, E. Desmet and G.H. Petit, "Tolerable delay bounds for low bit rate voice transport", Proceedings of the XVIIth World Telecommunications Congress, incorporating the International Switching Symposium 2000 (WTC/ISS2000), Birmingham, UK, 7-12 May 2000. (pdf)

2001

[14] M. Büchli, D. De Vleeschauwer, J. Janssen, A. Van Moffaert and G.H. Petit, "On the efficiency of voice over Integrated Services using Guaranteed Service", Proceedings of the 2nd IP Telephony Workshop (IPTel 2001), pp. 6-14, Columbia University, New York (NY), USA, April 2-3, 2001. (pdf)

[15] D. De Vleeschauwer, A. Van Moffaert, J. Janssen, M. Büchli, G.H. Petit, B. Steyaert and H. Bruneel, "Determining the number of packet-based phones that can be supported by one access node", Proceedings of the 14th ITC Specialists Seminar on Access Networks and Systems, pp. 197-204, Girona, Spain, 25-27 April 2001. (pdf)

[16] A. Van Moffaert, J. Janssen, D. De Vleeschauwer, M. Büchli, G.H. Petit and M. Verhoeyen, "Performance issues for voice over ADSL", Proceedings of the 14th ITC Specialists Seminar on Access Networks and Systems, pp. 287-296, Girona, Spain, 25-27 April 2001. (pdf)

[17] M.J.C. Büchli, D. De Vleeschauwer, J. Janssen, G.H. Petit and A. Van Moffaert, "Quality of calls transported over a DSL access network", Alcatel Telecommunications Review, pp. 111-115, 2nd Quarter 2001. (pdf)

[18] M. Büchli, D. De Vleeschauwer, J. Janssen, A. Van Moffaert and G.H. Petit, "Resource allocation and management in DiffServ networks for IP telephony", Proceedings of the 11th International Workshop on Network and Operating Systems Support for Audio and Video (NOSSDAV 2001), pp. 33-39, Port Jefferson (NY), USA, 25-26 June 2001. (pdf)

[19] A. Van Moffaert, D. De Vleeschauwer, J. Janssen, M.J.C. Büchli, G.H. Petit and P. Coppens, "Tuning the VoIP gateways to transport international voice calls over a best-effort IP backbone", Proceedings of the 9th IFIP Working Conference on Performance Modelling and Evaluation of ATM & IP Networks, pp. 193-205, Budapest, Hungary, 27-29 June 2001. (pdf)

[20] D. De Vleeschauwer, A. Van Moffaert, M.J.C. Büchli, J. Janssen and G.H. Petit, "Quality issues for packet-based voice transport", Telektronikk, Special issue on Internet Traffic Engineering, Volume 97, No. 2/3, pp. 319-331, 2001. (pdf)

[21] D. De Vleeschauwer, A. Van Moffaert, M.J.C. Büchli, J. Janssen, G.H. Petit, B. Steyaert and H. Bruneel, "Determining the tolerable load generated by a set of packet-based phones on a multiplexing node", Proceedings of the 17th International Teletraffic Congress "Teletraffic Engineering in the Internet Era" (ITC17), pp. 433-444, Salvador da Bahia, Brazil, 2-7 December 2001. (pdf)

[22] J. Janssen, D. De Vleeschauwer, M.J.C. Büchli and R.E. Kooij, "Tuning an IP-based network transporting telephony and videophony", Proceedings of 9th COST 263 (Quality of future Internet Services) meeting, Namur, Belgium, 17-18 December 2001. (pdf)

2002

[23] J. Janssen, D. De Vleeschauwer, R. Windey, G.H. Petit and J.-M. Leroy, "Delay bounds for voice over IP calls transported over satellite access networks", Journal on Mobile Networks and Applications (MONET), Special issue on Satellite-Based Information Services, Volume 7, No. 1, pp. 79-89, January 2002. (pdf)

[24] M.J.C. Büchli, D. De Vleeschauwer, J. Janssen and G.H. Petit, "Policing aggregates of voice traffic with the token bucket algorithm", Proceedings of the IEEE International Conference on Communications (ICC02), paper G06-1, New York City (NY), USA, 28 April - 2 May, 2002. (pdf)

[25] J. Janssen, D. De Vleeschauwer, M.J.C. Büchli and G.H. Petit, "Assessing voice quality in packet-based telephony", IEEE Internet Computing, Special issue on Internet Telephony, Vol. 6, No. 3, pp. 48-57, May/June 2002. (pdf)

[26] J. Janssen, D. De Vleeschauwer, M.J.C. Büchli and R.E. Kooij, "Dimensioning QoS-enabled IP Networks for high-quality telephony and videophony", Proceedings of Networks 2002, 10th International Telecommunication Network Strategy and Planning Symposium, pp. 205-212, Munich, Germany, 23-27 June 2002. (pdf)

[27] S. Van den Bosch, G. Van Hoey, N. Degrande, P. de La Vallée-Poussin, J. Janssen and H. De Neve, "Guaranteeing service continuity in traffic engineered networks", Proceedings of Networks 2002, 10th International Telecommunication Network Strategy and Planning Symposium, pp. 265-268, Munich, Germany, 23-27 June 2002. (pdf)

[28] J. Janssen, T. Coppens and D. De Vleeschauwer, "Quality assessment of video streaming in the broadband era", Proceedings of ACIVS 2002 (Advanced Concepts for Intelligent Video Systems), pp. 38-45, Ghent, Belgium, 9-11 September 2002. (pdf)

2005

[29] J. Van Lent, J. Janssen and S. Vandewalle, "Multigrid waveform relaxation for delay partial differential equations", Time-Delay Systems 2004 (edited by W. Michiels and D. Roose), IFAC Proceedings Volumes, pp. 203-208, 2005. (pdf)

 

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