1. 1st Workshop on End-to-End Service Differentiation, EESD’02.
2. 1st, 2nd & 3rd International Workshop on Intelligent Multimedia Computing and Networking ’99, '02 & ’03.
3. IFIP/SEC2002: 17th International Conference on Information Security ’02.
4. Multimedia on Clusters of Workstations: Mastering the Future '01.
5. 1st  IEEE International Symposium on Signal Processing & Information  Technology '01.
6. International Conference on Computer Assisted Instruction & Internet Computing' 00.
7. IEEE 19th International Conference on Distributed Computing Systems '99.
8. Hawaii International Conference on System Sciences '98.
9. The 5th  Maghrebian Conference on Software Engineering and Artificial Intelligence'98.
10. WET ICE '96
11. Joint Conference on Information Sciences '95.
12. Joint Conference on Information Sciences '94.
13. 30th Annual ACM Southeast Conference '88
14. TriComm'91 International Conference '89
 

   Reviewer:

 
1. IEEE Transactions on Software Engineering.
2. Journal of Computers and Operations Research.
3. Information Processing Letters.
4. Journal of Parallel and Distributed Computing.
5. IEEE Computers.
6. Journal of Information Science.
7. ACM Transactions on Information Systems.
8. Journal of Systems and Software.
9. Journal of Network and Systems Management.
10. Journal of Internet Technology.
11. Digital Technical Journal.
12. IEEE Transaction on Multimedia.
13. Reviewer for NSF proposals.
14. Hong Kong University Grants Committee.
15. Swiss Federal Institute of Technology (ETH) Research Commission