[2017-03-10] Dr. Yutaka Takahashi, Kyoto University, " Findings and Outcomes on Performance Analysis of Information Systems after over 40 years Research --- past, present and future”


Title: Findings and Outcomes on Performance Analysis of Information Systems after over 40 years Research --- past, present and future ---

Date: 2017-03-10 2:20pm-3:30pm

Location: R103, CSIE

Speaker: Dr. Yutaka Takahashi, Kyoto University

Hosted by: Prof. Phone Lin


In this talk, I will talk about the importance of performance analysis of information systems and show survey my research outcomes after more than 40 years activities, which range from fundamental theory to application-related results. Selected from those outcomes, in particular, I will focus on three topics. Firstly I will present an analysis of queueing networks with blocking which was obtained in my earliest research carrier and is still now useful to mathematically model communication systems, production systems, social systems with limited buffer capacity. The model was originally developed to consider the performance of switching nodes suffering from packet blocking. To my surprise, the analytical results were also applied to carry out capacity planning of social infrastructures such as a healthcare network system in U.S. and a penitentiary system in the Netherlands. It will be followed by analytical approaches to evaluate the performance of channel access protocols including polling and random access. With the advent of wireless communication, the topics have been studied for more than 30 years in accordance with newly emerging technologies. Finally, I will show some ongoing researches including SDN (Software Defined Network) and cloud computing. I will conclude my talk by presenting our future research topics. Through the talk, I will emphasize the importance of performance analysis by using stochastic models and show its versatile and long-term contribution beyond decades and original objectives of researches.



Dr. Yutaka Takahashi is a professor at Kyoto University and he has been very actively working in the field of computer science, communication networks, operation engineering and systems science. In particular, he has contributed to performance modeling and analysis of communication systems. He proposed a pioneering technique to analyze the performance of queueing networks with finite buffer which have a wide range of applications and then extended his interests to cover the performance analysis issues arising in protocols for local area networks and wireless/mobile networks. The

researches are followed by theoretical performance analyses of Internet applications,routing algorithms, congestion control algorithms, transmission loss recovery schemes,coding schemes, content delivery schemes. He was the founding co-chairman of IFIP WG6.3 for Performance Evaluation of Communication Systems and holding the position from 1993 to 2002. He has been also Elected Full Member of IFIP WG7.3 and 6.2 since 1997. In appreciation for his continuing contribution to IFIP, he was awarded Silver

Core by IFIP. He also served for ITU as a member of Focus Group on Traffic

Engineering for Personal Communications (FG-TEPC) from 1997 to 2000. He has been world-widely serving more than 200 international conferences and symposiums as organizer, program chair, advisory committee member, program committee member and he is currently serving four international journals and one series of books as an editor.

He has edited seven books related to his research fields and published by North-Holland,Chapman & Hall and Springer. He has published more than 190 refereed papers in internationally established journals such as IEEE Transactions, Journal of Operations Research Society of America, Performance Evaluation, Queueing Systems and conference proceedings such as IFIP conferences, ACM conferences, IEEE conferences.



B.E., 1975, M.E., 1977, Dr.Eng.,1981 (Dept. of Applied Mathematics and Physics,Fac. of Engineering, Kyoto University)

• Professional History

2012(Feb.---Mar.) Invited Professor at LRI, Univ. Paris 11, France

2009(Aug.---Oct.) Invited Professor at LRI, Univ. Paris 11, France

1999-present Professor of Department of Systems Science

Graduate School of Informatics, Kyoto University

1996-1999 Professor, Nara Institute of Science and Technology, Japan

1889-1996 Associate Professor of Department of Applied Mathematics

and Physics, Faculty of Engineering, Kyoto University

1880-1889 Assistant Professor of Department of Applied Mathematics

and Physics, Faculty of Engineering, Kyoto University

1883-1884 Invited Researcher at INRIA (Institut National de Recherche

en Informatique et en Automatique

最後修改時間:2017-03-06 PM 2:28

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