1. F.-M. Chang, J.-C. Ke, C.-H. Liou, (2012, Sep). Controlling arrival for the machine repair problem with switching failure.─2012 International Conference on Mathematical Modleing in Physical Sciences, Budapest, Hungary.

2. J.-C. Ke, C.-H. Wu, (2012, Sep). Infinite capacity multi-server queue with second optional service channel.─2012 International Conference on Mathematical Modeling in Physical Sciences, Budapest, Hungary.

3. J.-C. Ke, C.-H. Wu, (2011, Oct). Cost analgsis of a vacation machine repair model. ─The 2011 International Conference on Asia Pacific Business Innovation & Technology Management, Switzerland.

4. F.-M. Chang, J.-C. Ke, (2011, Oct). Cost analysis of a two-phase queue system with randomized control policy.─The 2011 International Conference on Asia Pacific Business Innovation & Technology Management, Switzerland.

5. T.-Y. Wang, J.-C. Ke, F.-M. Chang, (2011, Apr). A discrete-time queue with modified vacation policy.─The Fourth International Joint Conference on Computational Sciences and Optimization, China.

6. J.-C. Ke, J.-B. Ke, C.-H. Liou. , (2011, Aug). Controlling arrival and service of a two-removable-server system using Genetic algorithm. ─The Fourth Joint Conference on Computational Sciences and Optimization, China.

7. J.-C. Ke, C.-H. Wu, (2010, Dec). Multi-server machine repair problems with multi-threshold synchronous vacations. ─The 4th Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling, New Zealand.

8. J.-C. Ke, J.-B. Ke, C.-H. Lin, (2010, Jul). Cost optimization of an M/M/r queueing system with queue-dependent Servers: genetic algorithm. ─The Third Asia-Pacific Symposium on Queueing Theory and Network Applications, Beijing.

9. F.-M. Chang, J.-C. Ke, (2009, Jul). Batch arrival M/G/1 retrial queue under Bernoulli vacation schedule. ─Institute for Operations Research and the Management Sciences, New York.

10. H.-I. Huang, C.-H. Liou. , C.-H. Lin, J.-C. Ke, (2009, Jul). Genetic algorithm for optimal thresholds of a controllable two-server queue. ─Institute for Operations Research and the Management Sciences, New York.

11. K.-B. Huang, J.-C. Ke, W.-L. Pearn, (2009, Jul). Analysis of an unreliable server M[x]/G/1 system with randomized vacation and a delayed repair. ─Institute for Operations Research and the Management Sciences, New York.

12. J.-C. Ke, K.-B. Huang, W.-L. Pearn, (2009, Jul). Queueing and reliability measures for a vacation queue with an unreliable server and repair. ─Institute for Operations Research and the Management Sciences, New York.

13. T.-Y. Wang, J.-C. Ke, C.-H. Lin, (2009, Jul). A discrete-time Geo/G/1 queue with a single vacation. ─Institute for Operations Research and the Management Sciences, New York.

14. H.-I. Huang, C.-J. Chang, J.-C. Ke, (2008, Aug). Controlling arrivals for an M/H2/1 queueing system. ─The Third Asia-Pacific Symposium on Queueing Theory and Network Applications, Taiwan.

15. K.-B. Huang, W.-L. Pearn, J.-C. Ke, (2008, Aug). On the M[x]/G/1 queueing system with a randomized control policy. ─The Third Asia-Pacific Symposium on Queueing Theory and Network Applications, Taiwan.

16. C.-H. Wu, J.-C. Ke, W.-L. Pearn, (2008, Aug). An M/M/R queue with second optional service channel. ─The Third Asia-Pacific Symposium on Queueing Theory and Network Applications, Taiwan.

17. F.-M. Chang, J.-C. Ke, C.-J. Chang, (2008, Jul). Controlling arrivals for a queueing system with second optional service. ─The 18th International Conference on Flexible Automation and Intelligent Manufacturing FAIM 2008, Sweden.

18. J.-C. Ke, C.-H. Lin, H.-I. Huang, (2008, Jul). The discrete-time Geo/Geo/1 system with additional optional service. ─The 18th International Conference on Flexible Automation and Intelligent Manufacturing FAIM 2008,Sweden.

19. Z.-G. Zhang, J.-C. Ke, C.-H. Lin, H.-I. Huang, (2008, Jun). An Algorithmic analysis of multi-Server vacation model with threshold policy and service interruptions. ─The Sixth International Conference on Matrix-Analytic Methods in Stochastic Models, China.

20. C.-H. Wu, K.-H. Wang, J.-C. Ke, J.-B. Ke, (2007, Aug).Cost analysis of an M/M/R queue with multiple working vacations.─The Second Asia-Pacific Symposium on Queueing Theory and Network Applications (QTNA2007),Kobe, Japan.

21. K.-H. Wang, Y.-T. Kuo, J.-C. Ke, (2007, Aug).Optimal management of a finite capacity M/M/R queue with second optional channel. ─The Second Asia-Pacific Symposium on Queueing Theory and Network Applications (QTNA2007),Kobe, Japan.

22. Z.-G. Zhang, J.-C. Ke, (2006, Nov).Analysis of unreliable finite buffer multi-server system with vacations.─INFORMS Annual Meeting 2006 Pittsburgh, USA.

23. J.-C. Ke, Y.-K. Chu, (2006, Aug).Statistical inference of intensity for a queueing system.─Asian International Workshop on Advanced Reliability Modeling (AIWARM 2006)Busan, Korea.

24. S.-L. Lee, J.-C. Ke, (2006, Jun).Bayesian Analysis for a redundant repairable system with imperfect coverage.─Institute for Operations Research and the Management Sciences (INFORMS 2006) Hong Kong.

25. J.-C. Ke, Y.-K. Chu, (2006, Jun). Statistical inference for steady-state availability of a repairable system.─Institute for Operations Research and the Management Sciences (INFORMS 2006) Hong Kong.

26. J.-C. Ke, (2005, Jul).An M/G/1 retrial queue with a variant vacation policy.─17th Triennial Conference of the International Federation of Operational Research Societies (IFORS 2005), Hawaii, USA.

27. K.-H. Wang, L.-P. Wang, J.-C. Ke, (2004, Mar).Comparative analysis for the N policy M/G/1 queueing system with a removable and unreliable server.─33rd International Conference on Computers and Industrial Engineering, Jeju, Korea.

28. J.-C. Ke, K.-H. Wang, C.-H. Chen, (2004, Mar). Cost analysis of the M/M/R/N queueing system with multiple customer classes.─33rd International Conference on Computers and Industrial Engineering, Jeju, Korea.

29. J.-C. Ke, (2002, Jul). The N policy for the general input queue.─The 16th Triennial Conference of the International Federation of Operational Research Societies (IFORS), University of Edinburgh, Edinburgh, UK.

30. J.-C. Ke, (2001, Jul).Two thresholds of an M/G/1 queueing system with server breakdowns and two vacation types.─The 5th Word Multi-conference on Systemics, Cybernetics and Informatics, Orlando, Florida, USA.

31. J.-C. Ke, (2000, Dec).The optimal control of an M/G/1 queueing system with server startup and two vacation types.─The 5th Annual International Conference on Industrial Engineering Theories, Applications and Practice,Hsinchu, Taiwan

32. J.-C. Ke, K.-H. Wang, (2000, Jul).Heterogeneous arrivals to the optimal control of an M[x]/M/1 queueing system with server breakdown and startup times.─The 5th Conference of the Associaiton of the Asia-Pacific Operations Research Societies within IFORS, Singapore.

33. J.-C. Ke, (2000, Apr).Optimal strategy in N-policy production system with a start-up and unreliable Server.─The 15th Technological and Vocational Education Conference of R.O.C.Taichung, Taiwan

34. J.-C. Ke, K.-H. Wang, (1999, Aug).Reliability of a repairable system with warm standbys plus balking and reneging.─The 15th Triennial Conference of the International Federation of Operational Research Societies (IFORS), Beijing, China.

35. K.-H. Wang, J.-C. Ke, (1999, Aug).A recursive method to the optimal control of an M/G/1 queueing system with finite capacity.─The 15th Triennial Conference of the International Federation of Operational Research Societies (IFORS), Beijing, China.