1. HCM workshop Graz-Berlin ``New Methods in Combinatorial Optimization" at Institut fuer Mathematik, TU Graz, August 29-30, 1996.
  2. Symposium on Operations Research (SOR), TU Braunschweig, Germany, September 3-6, 1996. ``Optimal logistics for expeditions- the jeep problem".
  3. Discrete Optimization'99 , a DIMACS-RUTCOR Workshop at Rutgers University, July 25-31, 1999. ``On-Line algorithms for minimizing makespan on a single batch processing machine with dynamic job arrivals".
  4. Mathematical Methods in Manufacturing and Logistics , Oberwolfach, Germany, December 16-22, 2001. ``Batch processing machine scheduling".
  5. SIGOPT-International Conference on Optimization, Lambrecht (Pfalz) , Germany, February 17-22, 2002. ``Maximize the number of early multiprocessor tasks".
  6. Dagstuhl Seminar on On-Line Algorithms , Schloss Dagstuhl, Germany, June 30-July~5, 2002.
  7. The 27th International Symposium on Mathematical Foundations of Computer Science (MFCS ), Warsaw-Otwock, Poland, August 26-30, 2002. ``On maximizing the throughput of multiprocessor tasks".
  8. The 3rd International Workshop on Approximation and Randomized Algorithms in Communication Networks, Rome, Italy, September 21, 2002. ``On variable-sized bin packing".
  9. EU-Project IST-FET (Foundations of networks and large distributed environments) Review Meeting, Paphos, Cyprus, Jan. 30-Feb. 4, 2003, ``Maximizing the throughput of multiprocessor tasks".
  10. EU Project Workshop APPOL II (Approximation and On-Line Algorithms) , Bertinoro, Italy, March 23-28, 2003.
  11. EU Project Workshop CRESCCO (Critical resource sharing for cooperation in complex systems, IST-2001-33135) , Santorini, Greece, June 4-6, 2003.
  12. The 7th Japan-Korea Workshop on Algorithms and Computation (WAAC03) , Sendai, Japan, July 3-4, 2003. ``Online removable knapsack - weighted case".
  13. EU Project Workshop APPOL II (Approximation and On-Line Algorithms) , Szeged, Hungary, September 12-13, 2003.
  14. The First Workshop on Approximation and Online Algorithms (WAOA) , Budapest, Hungary, September 15-20, 2003. ``On-line extensible bin packing with unequal bin sizes".
  15. The 14th Annual International Symposium on Algorithms and Computation (ISSAC) , Kyoto, Japan, December 15-17, 2003. ``On-linescheduling of parallel jobs with dependencies on 2-dimensional meshes".
  16. The Upper Rhine Algorithms Workshop (URAW) , Karlsruhe, Germany, March 19-20, 2004, ``Maximizing the number of packed rectangles".
  17. Workshop on On-Line Algorithms (OLA) , Rungsted Kyst, Denmark, July 5-7, 2004, ``On-line scheduling of parallel jobs".
  18. The 9th Scandinavian Workshop on Algorithm Theory (SWAT) , Humleb鎘, Denmark, July 8 - 10, ``Maximizing the number of packed rectangles".
  19. Dagstuhl Seminar on Algorithms for Optimization with Incomplete Information ,  Schloss Dagstuhl, Germany, January 16-21, 2005. ``Online removable square packing".
  20. C.I.R.M. Workshop on Scheduling Algorithms for New Emerging Applications , Marseille, France, May 29-June 2, 2006. ``Online scheduling with hard deadlines".
  21. The Second International Conference on Algorithmic Aspects in Information and Management (AAIM) , Hong Kong, China, June 20-22, 2006. ``Online scheduling with hard deadlines"
  22. INFORMS International Conference , Hong Kong, China, June 25-28, 2006. ``Common deadline lazy bureaucrat scheduling".
  23. The First AAAC Annual Meeting, Hong Kong, April 26-27, 2008.
  24. C.I.R.M. Workshop on New Challenges in Scheduling Theory, Marseille, France, May 12-16, 2008.
  25. Bonn Workshop on Combinatorial Optimization, Bonn, Germany, November 3-7, 2008. ``Stable bin packing ".
  26. The 4th International Workshop on Internet and Network Economics (WINE), Shanghai, China, December 17-20, 2008.
    ``Bin packing of selfish items".