Hello! Welcome to Tuan PHUNG-DUC's Website


Postal address: Division of Policy and Planning Sciences, Faculty of Engineering, Information and Systems, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan

E-mail: x@y, where x = tuan and y = sk.tsukuba.ac.jp


Educational Background


Professional Background

Research Visits etc.


Areas of Interests

Publications ([Google Scholar Citations] [Elsevier Scopus] [ResearcherID] [ResearchGate])

Edited Journal Special Issues and Proceedings

Note: * denotes the students I supervised.

Journal Papers

  1. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “Performance Analysis of Optical Burst Switched Networks with Limited-Range Wavelength Conversion, Retransmission and Burst Segmentation,” Journal of the Operations Research Society of Japan, Vol. 52, No. 1, pp. 58--74, 2009. [PDF]

  2. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “M/M/3/3 and M/M/4/4 Retrial Queues,” Journal of Industrial and Management Optimization, Vol. 5, No. 3, pp. 431--451, 2009. [DOI: 10.3934/jimo.2009.5.431]

  3. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “State-Dependent M/M/c/c+r Retrial Queues with Bernoulli Abandonment,” Journal of Industrial and Management Optimization, Vol. 6, No. 3, pp. 517--540, 2010. [DOI: 10.3934/jimo.2010.6.517]

  4. Phung-Duc, T., and Kawanishi, K., “Multiserver Retrial Queues with After-Call Work,” Numerical Algebra, Control and Optimization, Vol. 1, No. 4, pp. 639--656, 2011. [DOI: 10.3934/naco.2011.1.639]

  5. Phung-Duc, T., “An Explicit Solution for a Tandem Queue with Retrials and Losses,” Operational Research, Vol. 12, No. 2, pp. 189--207, 2012. [DOI: 10.1007/s12351-011-0113-7]

  6. Artalejo, J.R., and Phung-Duc, T., “Markovian Retrial Queues with Two Way Communication,” Journal of Industrial and Management Optimization, Vol. 8, No. 4, 781--806, 2012. [DOI: 10.3934/jimo.2012.8.781]

  7. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “A Matrix Continued Fraction Approach to Multiserver Retrial Queues,” Annals of Operations Research, Vol. 202, No. 1, pp. 161--183, 2013. [DOI: 10.1007/s10479-011-0840-4]

  8. Artalejo, J.R., and Phung-Duc, T., “Single Server Retrial Queues with Two Way Communication,” Applied Mathematical Modelling, Vol. 37, No. 4, pp. 1811--1822, 2013. [DOI: 10.1016/j.apm.2012.04.022]

  9. Phung-Duc, T., and Kawanishi, K., “An Efficient Method for Performance Analysis of Blended Call Centers with Redial,” Asia-Pacific Journal of Operational Research, Vol. 31, No. 2, 1440008 (33 pages), 2014. [DOI: 10.1142/S0217595914400089]

  10. Phung-Duc, T., “Multiserver Retrial Queues with Two Types of Nonpersistent Customers,” Asia-Pacific Journal of Operational Research, Vol. 31, No. 2, 1440009 (27 pages), 2014. [DOI: 10.1142/S0217595914400090]

  11. Phung-Duc, T., and Kawanishi, K., “Performance Analysis of Call Centers with Abandonment, Retrial and After-Call Work,” Performance Evaluation, Vol. 80, pp. 43--62, 2014. [DOI: 10.1016/j.peva.2014.03.001]

  12. *Sakurai, H. and Phung-Duc, T., “Two-Way Communication Retrial Queues with Multiple Types of Outgoing Calls,” TOP, Vol. 23, No. 2, pp. 466-492, 2015. [DOI: 10.1007/s11750-014-0349-5]

  13. Phung-Duc, T., “Asymptotic Analysis for Markovian Queues with Two Types of Nonpersistent Retrial Customers,” Applied Mathematics and Computation, Vol. 265, pp. 768--784, 2015. [DOI: 10.1016/j.amc.2015.05.133]

  14. Kapodistria, S., Phung-Duc, T. and Resing, J., “Linear Birth/Immigration-Death Process with Binomial Catastrophes,” Probability in the Engineering and Informational Sciences, Vol. 30, No. 1, pp. 79--111, 2016. [DOI: 10.1017/S0269964815000297]

  15. *Kajiwara, K. and Phung-Duc, T., “Multiserver Queue with Guard Channel for Priority and Retrial Customers,” International Journal of Stochastic Analysis, Vol. 2016, Article ID 7168359, 23 pages, 2016. [DOI: 10.1155/2016/7168359]

  16. Phung-Duc, T., Rogiest, W., Takahashi, Y., and Bruneel, H., “Retrial Queues with Balanced Call Blending: Analysis of Single-Server and Multiserver Model,” Annals of Operations Research, Vol. 239, No. 2, pp. 429--449, 2016. [DOI: 10.1007/s10479-014-1598-2]

  17. *Sakurai, H. and Phung-Duc, T., “Scaling Limits for Single Server Retrial Queues with Two-Way Communication,” Annals of Operations Research, Vol. 247, No. 1, pp. 229--256, 2016. [DOI: 10.1007/s10479-015-1874-9]

  18. Phung-Duc, T., “Exact Solutions for M/M/c/Setup Queues,” Telecommunication Systems, Vol. 64, No. 2, pp. 309--324, 2017. [DOI: 10.1007/s11235-016-0177-z]

  19. Phung-Duc, T., “Single Server Retrial Queues with Setup Time,” Journal of Industrial and Management Optimization, Vol. 13, No. 3, pp. 1329--1345, 2017. [DOI: 10.3934/jimo.2016075]

  20. Morozov, E. and Phung-Duc, T., “Stability Analysis of a Multiclass Retrial System with Classical Retrial Policy,” Performance Evaluation, Vol. 112, pp. 15--26, 2017. [DOI: 10.1016/j.peva.2017.03.003]

  21. *Yajima, M. and Phung-Duc, T., “Batch Arrival Single Server Queue with Variable Service Speed and Setup Time,” Queueing Systems, Vol. 86, Nos. 3-4, pp. 241--260, 2017. [DOI: 10.1007/s11134-017-9533-2]

  22. Phung-Duc, T., Rogiest, W. and Wittevrongel, S., “Single Server Retrial Queues with Speed Scaling: Analysis and Performance Evaluation,” Journal of Industrial and Management Optimization, Vol. 13, No. 4, pp. 1927--1943, 2017. [DOI: 10.3934/jimo.2017025]

  23. Fiems, D. and Phung-Duc, T., “Light-Traffic Analysis of Random Access Systems without Collisions,” Published Online First in Annals of Operations Research, 2017. [DOI: 10.1007/s10479-017-2636-7]

  24. Phung-Duc, T. and Kawanishi, K., “Multiserver Retrial Queue with Setup Time and its Application to Data Centers,” to appear in Journal of Industrial and Management Optimization, 21 pages, 2017.

Refereed Book Chapters

  1. Phung-Duc, T., and Rogiest, W., “Two Way Communication Retrial Queues with Balanced Call Blending,” Proceedings of 19th International Conference on Analytical and Stochastic Modeling Techniques and Applications, ASMTA 2012, Grenoble, France, 4--6 June 2012, Al-Begain, K., Fiems, D. and Vincent, J.-M. (Eds.), Lecture Notes in Computer Science LNCS 7314, pp. 16--31, Springer. [DOI: 10.1007/978-3-642-30782-9_2]

  2. Phung-Duc, T., “Impatient Customers in Power-Saving Data Centers,” Proceedings of 21th International Conference on Analytical and Stochastic Modeling Techniques and Applications, ASMTA 2014, Budapest, Hungary, 30 June--2 July 2014, Sericola B., Telek M., and Gabor H., Eds., Lecture Notes in Computer Science LNCS 8499, pp 185--199, Springer. [DOI: 10.1007/978-3-319-08219-6_13]

  3. Aissani, A. and Phung-Duc, T., “Optimal Analysis for M/G/1 Retrial Queue with Two-Way Communication,” Proceedings of 22nd International Conference on Analytical & Stochastic Modelling Techniques & Applications (ASMTA'15), May 26 - 29, 2015, Albena, Bulgaria. Gribaudo, M., Manini, D. and Remke, A. Eds., Lecture Notes in Computer Science LNCS 9081, pp. 173-187, Springer. [DOI: 10.1007/978-3-319-18579-8_1]

  4. Phung-Duc, T., “Single-Server Systems with Power-Saving Modes,” Proceedings of 22nd International Conference on Analytical & Stochastic Modelling Techniques & Applications (ASMTA'15), May 26 - 29, 2015, Albena, Bulgaria. Gribaudo, M., Manini, D. and Remke, A. Eds., Lecture Notes in Computer Science LNCS 9081, pp. 158-172, Springer. [DOI: 10.1007/978-3-319-18579-8_12]

  5. Phung-Duc, T., “Multiserver Queues with Finite Capacity and Setup Time,” Proceedings of 22nd International Conference on Analytical & Stochastic Modelling Techniques & Applications (ASMTA'15), May 26 - 29, 2015, Albena, Bulgaria. Gribaudo, M., Manini, D. and Remke, A. Eds., Lecture Notes in Computer Science LNCS 9081, pp. 173-187, Springer. [DOI: 10.1007/978-3-319-18579-8_13]

  6. Phung-Duc, T., “M/M/1/1 Retrial Queues with Setup Time,” Proceedings of The 10th International Conference on Queueing Theory and Network Applications (QTNA2015), Hanoi, Vietnam, 17--20, August, 2015. Do, T.V., Takahashi, Y., Yue, W., Nguyen, V.-H. (Eds.), Advances in Intelligent Systems and Computing, Vol. 383, pp. 93-104. [DOI: 10.1007/978-3-319-22267-7_9]

  7. Phung-Duc, T. and Rogiest, W., “Analysis of an M/M/1 Retrial Queue with Speed Scaling,” Proceedings of The 10th International Conference on Queueing Theory and Network Applications (QTNA2015), Hanoi, Vietnam, 17--20, August, 2015. Do, T.V., Takahashi, Y., Yue, W., Nguyen, V.-H. (Eds.), Advances in Intelligent Systems and Computing, Vol. 383, pp. 113-124. [DOI: 10.1007/978-3-319-22267-7_11]

  8. Phung-Duc, T., “Retrial Queue for Cloud Systems with Separated Processing and Storage Units,” Proceedings of The 10th International Conference on Queueing Theory and Network Applications (QTNA2015), Hanoi, Vietnam, 17--20, August, 2015. Do, T.V., Takahashi, Y., Yue, W., Nguyen, V.-H. (Eds.), Advances in Intelligent Systems and Computing, Vol. 383, pp. 143-151. [DOI: 10.1007/978-3-319-22267-7_13]

  9. Pender, J. and Phung-Duc, T., “A Law of Large Numbers for M/M/c/Delayoff-Setup Queues with Nonstationary Arrivals,” Proceedings of 23rd International Conference on Analytical & Stochastic Modelling Techniques & Applications (ASMTA 2016), Cardiff, UK, 24-26 August, 2016, Lecture Notes in Computer Science, LNCS 9845, pp. 253-268, 2016. [DOI: 10.1007/978-3-319-43904-4_18]

  10. Phung-Duc, T. and Kawanishi, K., “Energy-Aware Data Centers with s-Staggered Setup and Abandonment,” Proceedings of 23rd International Conference on Analytical & Stochastic Modelling Techniques & Applications (ASMTA 2016), Cardiff, UK, 24-26 August, 2016, Lecture Notes in Computer Science, LNCS 9845, pp. 269-283, 2016. [DOI: 10.1007/978-3-319-43904-4_19]

  11. Dragieva, V. and Phung-Duc, T., “Two-Way Communication M/M/1//N Retrial Queue,” Proceedings of 24th International Conference on Analytical & Stochastic Modelling Techniques & Applications (ASMTA 2017), Newcastle-upon-Tyne, UK, 10-12 July, 2017, Thomas N., Forshaw M. (eds), Lecture Notes in Computer Science, LNCS 10378, pp. 81-94, 2017. [DOI: 10.1007/978-3-319-61428-1_6]

  12. Nazarov, A., Phung-Duc, T. and Paul, S. (2017), “Heavy Outgoing Call Asymptotics for MMPP/M/1/1 Retrial Queue with Two-Way Communication,” In A. Dudin et al. (Eds.) Information Technologies and Mathematical Modelling. Queueing Theory and Applications, ITMM 2017, Communications in Computer and Information Science, Vol. 800, pp. 28-41, Springer, Cham. [DOI: 10.1007/978-3-319-68069-9_3]

  13. Dragieva, V. and Phung-Duc, T., “Two-Way Communication M/M/1/1 Queue with Server-Orbit Interaction and Feedback of Outgoing Retrial Calls,” In A. Dudin et al. (Eds.) Information Technologies and Mathematical Modelling. Queueing Theory and Applications, ITMM 2017, Communications in Computer and Information Science, Vol. 800, pp.243-255, Springer, Cham. [DOI: 10.1007/978-3-319-68069-9_20]

  14. Phung-Duc, T. (2017), “Retrial Queueing Models: A Survey on Theory and Applications,” to appear in Stochastic Operations Research in Business and Industry (eds. by Tadashi Dohi, Katsunori Ano and Shoji Kasahara), World Scientific Publisher. [PDF]

Refereed Papers in Proceedings of International Conferences

  1. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “Burst Segmentation with Upper-Layer Retransmission and Its Effect on Wavelength Utilization for Optical Burst Switched Networks,” Proceedings of The First International Conference on Communications and Electronics (HUT-ICCE), Hanoi-Vietnam, pp. 35-40, IEEE Xplore, 10-11 October 2006. [DOI: 10.1109/CCE.2006.350840]

  2. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “Analytical Solutions for M/M/3/3 and M/M/4/4 Retrial Queues,” Proceedings of The 3rd Asia-Pacific Symposium on Queueing Theory and Network Applications (QTNA 2008), Academia Sinica, Taipei Taiwan, pp. 241--250, 30 July -- 2 August 2008. [Best Student Paper Award]

  3. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “Analytical Solutions for State-Dependent M/M/c/c+r Retrial Queues with Bernoulli Abandonment,” Proceedings of The 4th International Conference on Queueing Theory and Network Applications (QTNA 2009), Fusionopolis, Singapore, Article No.17, ACM New York, NY, USA, 29--31 July 2009. [DOI: 10.1145/1626553.1626570]

  4. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “A Simple Algorithm for the Rate Matrices of Level-Dependent QBD Processes,” Proceedings of The 5th International Conference on Queueing Theory and Network Applications (QTNA 2010), Beijing, China, pp. 46--52, ACM New York, NY, USA, 24--26 July 2010. [DOI: 10.1145/1837856.1837864]

  5. Artalejo, J.R., and Phung-Duc, T., “Markovian Single Server Retrial Queues with Two Way Communication,” Proceedings of The 6th International Conference on Queueing Theory and Network Applications (QTNA 2011), Seoul, Korea, pp. 1--7, ACM New York, NY, USA, 23--26 August 2011. [DOI: 10.1145/2021216.2021217]

  6. *Hashizume, K., Phung-Duc, T., Kasahara, S., and Takahashi, Y., “Queueing Analysis of Internet-Based Call Centers with Interactive Voice Response and Redial,” Proceedings of IEEE 17th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks 2012 (IEEE CAMAD 2012), Barcelona, Spain, pp. 373-377, 17--19, September 2012. [DOI: 10.1109/CAMAD.2012.6335371]

  7. *Sakurai, H., and Phung-Duc, T., “Single Server Markovian Retrial Queues with Multiple Types of Outgoing Calls,” Proceedings of The 8th International Conference on Queueing Theory and Network Applications (QTNA 2013), Taichung, Taiwan, pp. 39--46, July 30-- August 02, 2013. [PDF]

  8. *Kajiwara, K. and Phung-Duc, T., “Asymptotic and Numerical Analysis of Multiserver Retrial Queue with Guard Channel for Cellular Networks,” Proceedings of the Eight International Conference on Matrix-Analytic Methods in Stochastic Models (MAM8), NIT Calicut, Kerala, India, pp. 85--102, January 06--10, 2014. [PDF]

  9. *Hu, J. and Phung-Duc, T., “Power Consumption Analysis for Data Centers with Independent Setup Times and Threshold Controls,” Proceedings of 12th International Conference of Numerical Analysis and Applied Mathematics (Symposium on Computational Methods for Stochastic Models), Rhodes, Greece, 22-28 September 2014. AIP Conference Proceedings 1648, pp. 170005-1--170005-4 (2015). [DOI: 10.1063/1.4912463]

  10. Phung-Duc, T., “Server Farms with Batch Arrival and Staggered Setup,” Proceedings of The Fifth Symposium on Information and Communication Technology (SoICT). Hanoi, pp. 240--247, December 4--5, 2014. [DOI: 10.1145/2676585.2676613]

  11. Phung-Duc, T., “Large-Scale Data Center with Setup Time and Impatient Customer,” K. Djemame, R. Kavanagh and D. Armstrong (Eds.), Proceedings of the 31st UK Performance Engineering Workshop (UKPEW'2015), pp. 47--60. University of Leeds, UK, 17, September 2015.

  12. Phung-Duc, T., “Controllable Setup Queue for Energy-Aware Server,” K. Djemame, R. Kavanagh and D. Armstrong (Eds.), Proceedings of the 31st UK Performance Engineering Workshop (UKPEW'2015), pp. 96-109. University of Leeds, UK, 17, September 2015.

  13. Ren, Y., Phung-Duc, T., Yu, Z.- W. and Chen, J.-C., “Dynamic Auto Scaling Algorithm (DASA) for 5G Mobile Networks,” Proceedings of IEEE Globecom 2016: Communication QoS, Reliability & Modeling Symposium, Wasington, DC USA, 4-8 December 2016. [DOI: 10.1109/GLOCOM.2016.7841759]

  14. Phung-Duc, T. and Dragieva, V., “Stability Condition for a Multiserver Retrial Queue with Interaction between Servers and Orbit,” Proceedings of 14th International Conference of Numerical Analysis and Applied Mathematics (Stochastic Models: Methods and Applications), Rodos Palace Hotel, Rhodes, Greece, 19-25 September 2016. AIP Conference Proceedings, Vol. 1863, 200006, 2017. [DOI: 10.1063/1.4992377]

  15. Phung-Duc, T., Ren, Y., Chen, J.-C. and Yu, Z.- W., “Design and Analysis of Deadline and Budget Constrained Autoscaling (DBCA) Algorithm for 5G Mobile Networks,” Proceedings of 8th IEEE International Conference on Cloud Computing Technology and Science (IEEE Cloudcom 2016), pp. 94-101, Luxembourg, 12-15 December, 2016. [DOI: 10.1109/CloudCom.2016.0030]

  16. *Yajima, M., Phung-Duc, T. and Masuyama, H., “The Stability Condition of BMAP/M/∞ Queues,” Proceedings of The 11th International Conference on Queueing Theory and Network Applications (QTNA2016) (ACM Digital Library), 6 pages, Wellington, New Zealand, December 13--15, 2016. Candidate for Best Paper Awards. [DOI: 10.1145/3016032.3016046]

  17. Phung-Duc, T. and Kawanishi, K., “Impacts of Retrials on Power-Saving Policy in Data Centers,” Proceedings of The 11th International Conference on Queueing Theory and Network Applications (QTNA2016) (ACM Digital Library), 4 pages, Wellington, New Zealand, December 13--15, 2016. [DOI: 10.1145/3016032.3016047]

  18. Dragieva, V. and Phung-Duc, T., “Two-Way Communication M/M/1 Retrial Queue with Server-Orbit Interaction,” Proceedings of The 11th International Conference on Queueing Theory and Network Applications (QTNA2016) (ACM Digital Library), 7 pages, Wellington, New Zealand, December 13--15, 2016. [DOI: 10.1145/3016032.3016049]

  19. Fiems, D. and Phung-Duc, T., “Light-Traffic Analysis of Queues with Limited Heterogenous Retrials,” Proceedings of The 11th International Conference on Queueing Theory and Network Applications (QTNA2016) (ACM Digital Library), 4 pages, Wellington, New Zealand, December 13--15, 2016. [DOI: 10.1145/3016032.3016056]

  20. *Yajima, M., Phung-Duc, T. and Masuyama, H., “The stability Condition of the BMAP/PH/∞ Queues,” Proceedings of the 12th International Conference on Queueing Theory and Network Applications (QTNA2017), pp. 82--85, Yanshan University Qinhuangdao, China, August 21-23, 2017.

  21. Phung-Duc, T. and Dragieva, V., “Stability Analysis of Multiserver System with Servers-Orbit Interaction and Feedback,” 15th International Conference of Numerical Analysis and Applied Mathematics (Stochastic Models: Methods and Applications), Thessaloniki, Greece, September 25-30, 2017.

  22. Dimitriou, I. and Phung-Duc, T., “A Riemann-Hilbert Boundary Value Problem for Single Server Systems with Two Orbits for Blocked and Feedback Customers,” 15th International Conference of Numerical Analysis and Applied Mathematics (Stochastic Models: Methods and Applications), Thessaloniki, Greece, September 25-30, 2017.

  23. Aissani, A. and Phung-Duc, T., “Profiting the Idleness in Single Server System with Orbit-Queue,” to be presented in 11th EAI International Conference on Performance Evaluation Methodologies and Tools, Venice, Italy, December 5-7, 2017.

Submitted Papers

  1. Nazarov, A., Phung-Duc, T. and Paul, S. (2017), “Slow Retrial Asymptotics for a Single Server Queue with Two-Way Communication and Markov Modulated Poisson Input,” Submitted to Journal of Systems Science and Systems Engineering.

  2. Phung-Duc, T. et al., (2017), “Asymptotics of Queue Length Distributions in Priority Retrial Queues,” Submitted to Journal of Applied Probability.

Presentations in International Conferences

  1. Phung-Duc, T., “Multiserver Retrial Queues with Impatient Customers,” Chinese Academy of Sciences - Kyoto University Joint Workshop on Mathematical Methods for Informatics, Engineering and Management, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing, China, 17-18 March 2008.

  2. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “Analytical Solutions for Markov Processes Arising from Multiserver Retrial Queues with Balking,” The Fourth Vietnamese and Japanese Students' Scientific Exchange Conference, Kyoto University, Kyoto, Japan, pp. 212--213, 15-16 Novermber 2008.

  3. Phung-Duc, T., “Matrix Continued Fraction Approach to Retrial Queues,” Joint Workshop of Beijing, Hong Kong and Kyoto on Computational Mathematics, Computer and Systems Sciences (CMCSS), Kyoto University, Kyoto, 14-15 March 2009 (Poster Presentation).

  4. Phung-Duc, T., “Simple Algorithms for Level-Dependent Quasi-Birth-and-Death Processes and their Application to Multiserver Retrial Queues,” Joint Workshop of Hanoi University of Science and Technology and Kyoto University on Applied Mathematics & Informatics, Kyoto University, Kyoto, 20-21 March 2010.

  5. Phung-Duc, T., “Matrix Continued Fraction Solutions for State-Dependent Multiserver Retrial Queues with Abandonments,” Joint Workshop of Hanoi University of Science and Technology and Kyoto University on Applied Mathematics & Informatics, Hanoi University of Science and Technology, Hanoi, 20-21 March 2011.

  6. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “Matrix Continued Fraction Approach to Level-dependent QBD Process and its Application to Mutiserver Retrial Queues,” Third Madrid Conference on Queueing Theory, Toledo, Spain, June 28 - July 1, 2010.

  7. Phung-Duc, T., “An Explicit Solution for a Tandem Queue with Retrials and Losses,” The 8th International Workshop on Retrial Queues, Beijing, China, July 27 - July 29, 2010.

  8. Phung-Duc, T., and Takahashi, Y., “An Efficient Numerical Method for Multiserver Retrial Queues with Abandonments,” IFORS 2011, Conference for the International Federation of Operational Research Societies, (Invited session organized by Takahashi, Y.) Melbourne, Australia, 10-15 July 2011.

  9. Phung-Duc, T., “Numerical Analysis of M/M/c/K+M Retrial Queue with Losses,” 9th International Workshop on Retrial Queues, Sevilla, Spain, 28-30 June, 2012.

  10. Artalejo, J.R., and Phung-Duc, T., “On The M/G/1 Retrial Queue with Two-way Communication,” 9th International Workshop on Retrial Queues, Sevilla, Spain, 28-30 June, 2012.

  11. Phung-Duc, T. and Kawanishi, K., “The Impact of Retrial Phenomenon on Performance of Blended Call Centers,” 9th International Workshop on Retrial Queues, Sevilla, Spain, 28-30 June, 2012.

  12. Phung-Duc, T. and Resing, J., Kapodistria S., and Economou A., “Queueing Models with Both Linear and Binomial Transition Rates (Part 1),” 9th International Workshop on Retrial Queues, Sevilla, Spain, 28-30 June, 2012.

  13. Phung-Duc, T. and Resing, J., Kapodistria S., and Economou A., “Queueing Models with Both Linear and Binomial Transition Rates (Part 2),” 9th International Workshop on Retrial Queues, Sevilla, Spain, 28-30 June, 2012.

  14. Rogiest, W. and Phung-Duc, T., “Quantifying the Call Blending Balance in Two Way Communication Retrial Queues: Analysis of Correlation,” The 7th International Conference on Queueing Theory and Network Applications (QTNA2012) (Organized session by Phung-Duc, T.), Kyoto, Japan, 1-3 August, 2012.

  15. Phung-Duc, T. and Kawanishi, K., “Modelling of Retrial, Abandonment and After-Call Work in Call Centers,” The 7th International Conference on Queueing Theory and Network Applications (QTNA2012) (Organized session by Phung-Duc, T.), Kyoto, Japan, 1-3 August, 2012.

  16. Phung-Duc, T., “Perturbation Analysis of Multiserver Retrial Queues,” Young European Queueing Theorists (YEQT-VI): Workshop on Analytic Methods in Queueing Systems, Eindhoven University of Technology, Eindhoven, The Netherlands, 1-3 November, 2012. (Invited).

  17. Phung-Duc, T., “An Asymptotic Analysis for Multiserver Retrial Queues with Two Types of Non-persistent Customers,” EURO - INFORMS Joint International Conference, The 26th European Conference on Operational Research, (Invited session organized by Ano, K.) Roma, Italia, 1-4 July, 2013.

  18. Kapodistria, S., Resing, J.A.C., Phung-Duc, T., “Factorial Approach for the Study of the Infinite Server Queue with Synchronized Reneging,” 17th INFORMS Applied Probability Society Conference, Costa Rica, 15--17, July, 2013.

  19. Phung-Duc, T., “Queueing Analysis of Power Saving Management in Data Centers,” The 6th Vietnamese-Japanese Students' Scientific Exchange Meeting (VJSE-2013), Osaka, Japan, 23 September, 2013. (Invited).

  20. Phung-Duc, T., “Exact Solutions for M/M/c/Setup Queues,” International Workshop on Advances in Future Internet Research, Services and Technology (IWA-FIRST), Debrecen, Hungary, 03-04 July 2014 (Invited). [LINK]

  21. *Sakurai, H., and Phung-Duc, T., “Asymptotic Analysis of Single Server Retrial Queues with Outgoing Calls,” 10th International Workshop on Retrial Queues (WRQ'2014), July 24--26, 2014, Tokyo, Japan. [LINK]

  22. Phung-Duc, T., “Batch Arrival Multiserver Queues with State-Dependent Setup Time,” First European Conference on Queueing Theory (ECQT 2014), Ghent, Belgium, 20--22 August, 2014.

  23. Phung-Duc, T., “Exact Analysis of Multiserver Queues with Setup Time,” 18th INFORMS Applied Probability Society Conference, July 5-8, 2015, Istanbul, Turkey.

  24. *Yajima, M. and Phung-Duc, T., “Batch Arrival Single Server Queue with Variable Service Speed and Setup Time,” Second European Conference on Queueing Theory (ECQT 2016), Toulouse, France, 18--20 July, 2016.

  25. Morozov, E. and Phung-Duc, T., “Stability Analysis of a Multiclass, Multiorbit System with Classical Retrials,” Second European Conference on Queueing Theory (ECQT 2016), Toulouse, France, 18--20 July, 2016.

  26. Pender, J. and Phung-Duc, T., “M/M/c Delay-Off Setup Queues with Nonstationary Arrivals: A Fluid Model Approach,” Second European Conference on Queueing Theory (ECQT 2016), Toulouse, France, 18--20 July, 2016.

  27. Walraevens, J. and Phung-Duc, T., “Asymptotics in Priority Retrial Queues,” Second European Conference on Queueing Theory (ECQT 2016), Toulouse, France, 18--20 July, 2016.

  28. Phung-Duc, T., “Exact Solution for Service System with Fixed and Flexible Servers,” Second European Conference on Queueing Theory (ECQT 2016), Toulouse, France, 18--20 July, 2016.

  29. Phung-Duc, T. and Kawanishi, K., “Multiserver Retrial Queue with Setup Time,” 11th International Workshop on Retrial Queues and Related Topics (WRQ11), Amsterdam, The Netherlands, August 31 -- September 2, 2016.

Papers or Extended Abstracts in Proceedings of Domestic Conferences (Non-reviewed)

  1. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “Performance Analysis of Burst Segmentation with Retransmission of Upper-layer for Optical Burst Switched Networks,”Abstracts of The 2006 Fall National Conference of Operations Research Society of Japan, Aichi University, Nagoya, Aichi Prefecture, Japan, pp.118-119, 12-13 September 2006 (in Japanese).

  2. Phung-Duc, T., Masuyama, H., Kasahara, S., and Taahashi, Y., “Performance Analysis of Burst Segmentation with Upper-Layer Retransmission for Optical Burst Switched Networks,” Proceedings of The 25th Queueing Symposium: Stochastic Models and their Applications, Nihon University, Fukushima Prefecture, Japan, pp. 175-184 , 22-24 January 2007.

  3. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “Performance Evaluation of Burst Segmentation and Wavelength Conversion Using a Retrial Queue with Random Server Selection,” Abstracts of The 2008 Spring National Conference of Operations Research Society of Japan, Kyoto Computer Gakuin University, Kyoto Prefecture, Japan, pp. 128-129, 25-26 March 2008 (in Japanese).

  4. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “On Continued Fraction Solutions for Markov Chains Arising from Multiserver Retrial Queues with Balking,” Abstracts of The 2008 Fall National Conference of Operations Research Society of Japan, Sapporo Convention Center, Hokkaido Prefecture, Japan, pp. 264--265, 10-11 September 2008.

  5. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “Continued Fraction Solutions of M/M/3/3 and M/M/4/4 Retrial Queues,” Proceedings of The 28th Queueing Symposium: Stochastic Models and their Applications, Matsumoto City, Nagano Prefecture, Japan, pp. 98-107 , 21-23 January 2009.

  6. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “Matrix Continued Fraction Solutions for Multiserver Retrial Queues,” Proceedings of The 29th Queueing Symposium: Stochastic Models and their Applications, Kyoto City, Kyoto Prefecture, Japan, pp. 133-142, 17-19 January 2011.

  7. Phung-Duc, T., and Takahashi, Y., “A Matrix Analytic Method for State-Dependent M/M/c/K Retrial Queues with Abandonments,” Abstracts of The 2011 Fall National Conference of Operations Research Society of Japan, Kobe, Japan, pp. 54--55, 15-16 September 2011.

  8. Phung-Duc, T., and Kawanishi, K., “A Stability Condition for Multiserver Retrial Queues with Abandonment and After-Call Work,” Abstracts of The 2011 Fall National Conference of Operations Research Society of Japan, Kobe, Japan, pp. 218--219, 15-16 September 2011. (In Japanese).

  9. Phung-Duc, T., and Kawanishi, K., “A Retrial Queueing Model with Abandonment and After-Call Work,” Proceedings of The 30th Queueing Symposium: Stochastic Models and their Applications, Hamamatsu, Shizuoka Prefecture, Japan, pp. 1--10, 18-20 January 2012.

  10. Artalejo, J.R., and Phung-Duc, T., “Stationary Analysis for Single Server Retrial Queues with Two Way Communication,” Proceedings of The 30th Queueing Symposium: Stochastic Models and their Applications, Hamamatsu, Shizuoka Prefecture, Japan, pp. 11--20, 18-20 January 2012.

  11. *Hashizume, K., Phung-Duc, T., Kasahara, S., and Takahashi, Y., “Performance Analysis of Call Centers with Interactive Voice Response and Redial Customers: An Approach by Retrial Queues,” IEICE Technical Report, Seagaia, Miyazaki, Japan, pp. 107-112, 8--9, March 2012.

  12. Phung-Duc, T., Resing, J., Kapodistria S., and Economou A., “ The MX/M/∞ Queue with Synchronized Abandonment,” Abstracts of The 2012 Spring National Conference of Operations Research Society of Japan, Kanagawa Prefecture, Japan, pp. 80--81, 27-28 March 2012.

  13. Phung-Duc, T., and Kawanishi, K., “ An Alternative Solution by Matrix Analytic Method for Single Server Retrial Queue with Two Way Communication,” Abstracts of The 2012 Autumn National Conference of Operations Research Society of Japan, Nagoya, Aichi Prefecture, Japan.

  14. *Kajiwara, K., and Phung-Duc, T., “Asymptotic Analysis for Retrial Queues with Common and Dedicated Servers,” Proceedings of The 31th Queueing Symposium: Stochastic Models and their Applications, Nagasaki, Japan, pp. 87--96, 23--25 January 2013.

  15. *Hashizume, K., Phung-Duc, T., Kasahara, S., and Takahashi, Y., “Analysis of a Retrial Queue for Internet-Based Call Centers with Interactive Voice Response,” Proceedings of The 31th Queueing Symposium: Stochastic Models and their Applications, Nagasaki, Japan, pp. 147--156, 23--25 January 2013.

  16. Phung-Duc, T., Kapodistria S., and Resing, J., “Queueing Models with Both Linear and Binomial Transition Rates,” Proceedings of The 31th Queueing Symposium: Stochastic Models and their Applications, Nagasaki, Japan, pp. 189--198, 23--25 January 2013.

  17. *Sakurai, H., and Phung-Duc, T., “ Analysis of Single Server Retrial Queues with Multiple Types of Outgoing call,” Abstracts of The 2013 Spring National Conference of Operations Research Society of Japan, Tokyo, Japan, pp. 248--249, 5-6 March 2013.

  18. *Hashizume, K., Phung-Duc, T., Kasahara, S., and Takahashi, Y., “Performance Analysis of Internet-based Call Centers with Interactive Voice Response and Retrial Customers,” IEICE Technical Report, pp. 219--224, 7--8 March 2013, Okinawa, Japan.

  19. *Hu, J., Phung-Duc, T., and Miyoshi, N., “Queueing Analysis of Power Consumption in Server Farm with Independent Setup Times,” Abstracts of The 2013 Autumn National Conference of Operations Research Society of Japan, pp. 24--25, 11--12 September 2013, Tokushima, Japan.

  20. Phung-Duc, T., “Asymptotic Analysis for Markovian Retrial Queues with Two Types of Nonpersistent Customers,” Proceedings of the Symposium on Stochastic Models 2014, pp. 127--136, January 22-24, 2014, Tokyo University of Sciences, Tokyo, Japan.

  21. *Sakurai, H., and Phung-Duc, T., “ Asymptotic Analysis of Single Server Retrial Queues with Outgoing calls,” Abstracts of The 2014 Spring National Conference of Operations Research Society of Japan, Osaka, Japan, pp. 56--57, 6-7 March 2014.

  22. *Yajima, M. and Phung-Duc, T., “Analysis of a Batch Arrival Single Server Queue with Adjustable Service Rate,” Proceedings of the Queueing Symposium: Stochastic Models and their Applications 2016, pp. 15--24, January 21-23, 2016, Tama, Tokyo, Japan. (in Japanese).

  23. Phung-Duc, T., “Batch Arrival Multiserver Queue with Setup Time,” Proceedings of the Queueing Symposium: Stochastic Models and their Applications 2016, pp. 113--122, January 21-23, 2016, Tama, Tokyo, Japan.

  24. Phung-Duc, T. and Kawanishi. K, “A Simple Method for Performance Analysis of Data Center with Setup Time and Abandonment,” Abstracts of The 2016 Spring National Conference of Operations Research Society of Japan, Tokyo, Japan, pp. 249--250, 17-18 March 2016.

  25. Phung-Duc, T. and Kawanishi. K, “Evaluation of the Waiting Time Distribution in Service Systems with Power Control and Customer Abandonment,” Abstracts of The 2016 Spring National Conference of Operations Research Society of Japan, Tokyo, Japan, pp. 253--254, 17-18 March 2016. (in Japanese).

  26. *Sugahara, T. and Phung-Duc, T., “Analysis of Multidimensional Risk Process with Interest -- The Case of MPH Claims,” Abstracts of The 2016 Spring National Conference of Operations Research Society of Japan, Tokyo, Japan, pp. 257--258, 17-18 March 2016. (in Japanese).

  27. *Yajima, M., Phung-Duc, T. and Masuyama, H., “Stability Condition of the BMAP/PH/∞ Queue,” Abstracts of The 2016 Fall National Conference of Operations Research Society of Japan, Yamagata, Japan, pp. 252--253, 15-16 September 2016. (in Japanese).

  28. *Ushigaki, R., Phung-Duc, T., “Evaluation of Car Park Sharing System using Queueing Theory,” Abstracts of The 2016 Fall National Conference of Operations Research Society of Japan, Yamagata, Japan, pp. 258--259, 15-16 September 2016. (in Japanese).

  29. *Yajima, M. and Phung-Duc, T., “A Central Limit Theorem for Markov Modulated MX/M/∞ Queues with Binomial Catastrophes,” Proceedings of the Queueing Symposium: Stochastic Models and their Applications 2017, pp. 19--28, January 19-21, 2017, Morito Kinen Kaikan, Kamirakuzaka, Tokyo, Japan.

  30. *Yajima, M. and Phung-Duc, T., “A Central Limit Theorem for Markov Modulated MX/M/∞ Queues with Binomial Catastrophes,” Abstracts of The 2017 Spring National Conference of Operations Research Society of Japan, Okinawa, Japan, pp. 57--58, 15-17 March 2017. (in Japanese).

Seminar Talks in Special Interest Groups

  1. Phung-Duc, T., “Performance Analysis of Burst Segmentation with Retransmission for Optical Burst Switched Networks,” Seminar for Young Researchers in Operations Research of Japan (KSMAP), Kyoto University, 15 April 2006.

  2. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “Performance Analysis of Burst Segmentation with Upper-Layer Retransmission, Preemptive Control and Multiple Wavelengths for Optical Burst Switched Networks,” Seminar for Young Researchers in Operations Research of Japan (KSMAP) , Kyoto University, 26 May 2007.

  3. Phung-Duc, T., Masuyama, H., Kasahara, S., and Takahashi, Y., “M/M/c/K Retrial Queues with System State Dependent Rates,” Meeting of Young Researchers in Operations Research, The Operations Research Society of Japan, Kansai University, 11-12 October 2008. [Student Presentation Award] (Poster).

  4. Phung-Duc, T., “On Analytical Solution for M/M/c/c Retrial Queues with Abandonment,” The 208th Workshop of Special Interest Group of Queueing Theory, The Operations Research Society of Japan, Tokyo Institute of Technology, 18 October 2008.

  5. Phung-Duc, T., “Backward Algorithms for Level-dependent QBD processes and their Application to Multiserver Retrial Queues,” The 215th Workshop of Special Interest Group of Queueing Theory, The Operations Research Society of Japan, Tokyo Institute of Technology, 17 October 2009.

  6. Phung-Duc, T., “An Explicit Solution for a Tandem Queue with Retrials and Losses,” The 222th Workshop of Special Interest Group of Queueing Theory, The Operations Research Society of Japan, Kyoto University Tokyo Office, Tokyo, 16 October 2010.

  7. Artalejo, J.R., Phung-Duc, T. “On Retrial Queues with Two Way Communication,” Meeting of Young Researchers in Operations Research, The Operations Research Society of Japan, Biwako Conference Center, 29-31 August 2011.

  8. Phung-Duc, T., “Analytical and Numerical Solutions for the Stationary Distribution of Retrial Queues with Two Way Communication,” The 229th Workshop of Special Interest Group of Queueing Theory, The Operations Research Society of Japan, Kyoto University Tokyo Office, Tokyo, 19 November 2011.

  9. Phung-Duc, T. “Modelling of Call Centers by Queueing Theory,” Meeting of Young Researchers in Operations Research, The Operations Research Society of Japan, Biwako Conference Center, 27-28 October 2012. (Invited Tutorial Talk).

  10. Phung-Duc, T., “Asymptotic Analysis for Multiserver Retrial Queues by Level-Dependent QBD Processes,” The 239th Workshop of Special Interest Group of Queueing Theory, The Operations Research Society of Japan, Tokyo Institute of Technology, Tokyo, 18 May 2013.

  11. Phung-Duc, T., “Queueing Analysis of Power Consumption in Data Centers,” The 248th Workshop of Special Interest Group of Queueing Theory, The Operations Research Society of Japan, Tokyo Institute of Technology, Tokyo, 19 July 2014.

  12. Phung-Duc, T., “On Queueing Models for Data Centers,” Workshop on Analysis of Stochastic Models, Yudanaka, Nagano, 3--5 September 2014.

  13. Phung-Duc, T., “Evaluation of Power Consumption in Data Centers: A Queueing Theoretical Approach,” Special Interest Group of Decision-Making Modeling under Uncertainty, The Operations Research Society of Japan, Osaka, 11 April 2015.

  14. Phung-Duc, T., “Performance Analysis of Data Centers Using Level-Dependent QBD processes,” Workshop on Analysis of Stochastic Models, Yuzawa, 26--28 August 2015.

Invited Talks in Universities

  1. Phung-Duc, T., “On Analytical Solutions for Multiserver Retrial Queues,” Colloquium of the Laboratory of Applied Mathematical Analysis, Department of Applied Mathematics and Physics, Graduate School of Informatics, Kyoto University, Japan, 11 April 2008. Organized by Prof. Yoshimasa Nakamura. [LINK]

  2. Phung-Duc, T., “Analytical and Numerical Solutions for Multiserver Retrial Queues,” EURANDOM Institute, Eindhoven University of Technology, The Netherlands, 16 November 2010. Organized by Prof. Onno Boxma. [LINK]

  3. Phung-Duc, T., “Matrix Continued Fraction Solutions of Multiserver Retrial Queues,” Tinbergen Institute, Amsterdam, The Netherlands, 18 November 2010. Organized by Prof. Rein Nobel.

  4. Phung-Duc, T., “Level-Depdendent Quasi-Birth-and-Death Processes and their Applications in Multiserver Retrial Queues,” School of Statistics, Complutense University of Madrid, Spain, 17 May 2011. Organized by Prof. Maria Jesus Lopez-Herrero.

  5. Phung-Duc, T., “Matrix Continued Fraction Solutions for Multiserver Retrial Queues with Abandonments,” Department of Mathematics, Faculty of Engineering, Swinburn University of Technology, Australia, 13 July 2011. Organized by Dr. Yoni Nazarathy and Prof. Lachlan Andrew. [LINK]

  6. Phung-Duc, T., “ Quasi-Birth-and-Death Process Approaches to the Analysis of Multiserver Retrial Queues,” Colloquium of the Laboratory of Applied Mathematical Analysis, Department of Applied Mathematics and Physics, Graduate School of Informatics, Kyoto University, Japan, 21 October 2011. Organized by Prof. Satoshi Tsujimoto. [LINK]

  7. Phung-Duc, T., “Taylor Series Expansion for Markovian Retrial Queues,” Tinbergen Institute, Amsterdam, The Netherlands, 9 November 2012. Organized by Prof. Ad Ridder. [LINK]

  8. Phung-Duc, T., “Another Look at the M/M/c Queue with Staggered Setup,” Waseda Univeristy, Tokyo, 12 November 2013. Organized by Prof. Hirotaka Sakasegawa.

  9. Phung-Duc, T., “Server Farms with Batch Arrival and Staggered Setup,” Aizu Univeristy, Aizu, 27 November 2014. Organized by Prof. Anh T. Pham.

  10. Phung-Duc, T., “Exact Solutions for Queues with Setup Times via Generating Function and Matrix Analytic Approaches,” Ghent University, Ghent, Belgium, 5 March 2015. Organized by Prof. Herwig Bruneel and Dr. Wouter Rogiest.

  11. Phung-Duc, T., “Multiserver Queues with Setup Time or Vacation,” VU University Amsterdam, Amsterdam, The Netherlands, 9 March 2015. Organized by Prof. Ad Ridder and Prof. Rein Nobel [LINK]

  12. Phung-Duc, T., “Multiserver Queues with Setup Time: Exact and Numerical Solutions and Conditional Decomposition,” EURANDOM Institute, Eindhoven University of Technology, The Netherlands, 10 March 2015. Organized by Prof. Ivo Adan and Dr. Stella Kapodistria. [LINK]

  13. Phung-Duc, T., “Asymptotic Analysis for Markovian Queues with Two Types of Nonpersistent Retrial Customers,” Institute of Applied Mathematics, Middle East Technical University, Turkey, 10 July 2015. Organized by Prof. Devin Sezer. [LINK]

  14. Phung-Duc, T., “Queueing Theory: From M/M/1 to Matrix Analytic Methods and Its Application in Performance Evaluation of Computer and Communication Systems,” Department of Computer Science, National Chiao Tung University, Hsinchu City, Taiwan, 20 September 2017. Organized by Prof. Ying-Dar Lin. [LINK]

Theses

  1. Phung-Duc, T., “Performance Analysis of Burst Segmentation in Optical Burst Switched Networks with Retransmission,” Bachelor of Engineering, Applied Mathematics and Physics Course in the School of Informatics and Mathematical Science, Faculty of Engineering of Kyoto University, Japan, March 2006 (Written in Japanese).

  2. Phung-Duc, T., “Performance Analysis of Optical Burst Switched Networks with Wavelength Conversion and Retransmission,” Master of Informatics, Department of Systems Science, Graduate School of Informatics, Kyoto University, Japan, March 2008.

  3. Phung-Duc, T., “Retrial Queues and their Applications in Communication Systems,” Doctor of Informatics, Department of Systems Science, Graduate School of Informatics, Kyoto University, Japan, March 2011.


Research Grants (PI)

  • Performance Evaluation of Service Systems Using Retrial Queues, GCOE Young Leader Fostering Program, Graduate School of Informatics, Kyoto University, November 2008--March 2009 [Website]

  • Performance Evaluation of Large-scale Information Systems Using Multiserver Retrial Queues, GCOE Young Leader Fostering Program, Graduate School of Informatics, Kyoto University, July 2009--March 2010 [Website]

  • Travel Grant for Visitting Eurandom Institute of Eindhoven University of Technology, GCOE Program, Graduate School of Informatics, Kyoto University, November 2010-- December 2010 [Website]

  • Analysis of Multiserver Retrial Queues and Its Applications on Information Networks, Grant-in-Aid for JSPS Fellows, April 2010--March 2012 [Website]

  • Performance Analysis of Call Centers using Retrial Queues and Its Application to Service Science, JSPS Research Activity Start-up, September 2012--March 2014 [Website]

  • Modelling and Performance Analysis of Call Centers with Retrials and Abandonment, JSPS Grant-in-Aid for Young Scientists (B), April 2014--March 2017 [Website]

  • Travel Grant for Visitting Ghent University, University of Antwerp and Eindhoven University of Technology, granted by Tokyo Institute of Technology, February 16-- March 16 2015 [Website]

  • Travel Grant for Parcipating International Conference, Telecommunications Advancement Foundation, August 2015 [Website]

Academic Societies

  • Member of The Operations Research Society of Japan from April, 2008 [Website]

  • Member of The Japan Society for Industrial and Applied Mathematics from April, 2013 [Website]

  • Member of ACM Sigmetrices (Special interest group for the computer systems performance evaluation) from January, 2014 [Website]

  • Member of INFORMS Applied Probability Society (APS) from May, 2014 [Website]

  • Member of EURO working group on stochastic modelling from February, 2014 [Website]


Editorship

  • Editor of KSII Transactions on Internet and Information Systems (Korean Society for Internet Information) from January 2013 [Website]

  • Editor of Journal of Platform Technology (ICT Platform Society) from November 2013 [Website]

  • Editorial Board of International Journal of Applied & Experimental Mathematics (IJAEM) from December 2015 [Website]

  • Associate Editor of Queueing Models and Service Management (QMSM) from May 2017 [Website]

Chair of International Conferences

Contribution to International Conferences

Referee for Journals

Referee for Research Proposals


Teaching Experiences (in Japanese).

Work Experiences


Awards (Myself)

Awards (Supervised students)


Links