My publications

Hiroshi Toyoizumi, Social queue - スズメバチの作る待ち行列, 2006年度待ち行列シンポジウム「ユビキタスネットワーク社会における情報通信サービスの設計・評価法」, 2007 (訂正版pdf)

Hiroshi Toyoizumi, An Infinite Phase-Size BMAP/M/1 Queue and its Application to Secure Group Communication, Proceedings of the International Conference on Security and Cryptography (SECRYPT 2006), 283-288, 2006 (pdf)

Hiroshi Toyoizumi, Performance Evaluation of Quantum Merging: Negative Queue Length, The 14th Quantum Information Technology Symposium (QIT14), 2006 (pdf, presentation)

Hiroshi Toyoizumi, Optimal Merging and Its Evaluation in Multicast, INFORMS Hong Kong, 2006

Tatehiro Kaiwa, Hiroshi Toyoizumi, Observation of Spread Dynamics of Malicious Software and its Comparison to Theoretical Model, Symposium of Network Ecology, 2006 (pdf)

Hiroshi Toyoizumi, Negative Queue Length: Queues for Quantum Information, In Proceedings of the queueing symposium, 1-8, 2005 (pdf)

Hiroshi Toyoizumi, An Infinite Phase-size BMAP/M/1 Queue and Its Application to Secure Communication, 13th INFORMS Applied Probability Conference, Ottawa, 2005

Hiroshi Toyoizumi, Kenta Kaiwa, Obeservation and Modeling Method of Dynamics of Computer Virus Spread, IEICE 3rd QoS Workshop 2005 (pdf)

Hiroshi Toyoizumi, An infinite phase-size BMAP/M/1 queue and its application to Secure Communication, Japan Society of Operations Research, Presentation at Q-bukai (pdf)

Hiroshi Toyoizumi, Yuuzo Kobayashi, Kenta Kaiwa, Jiyun Shitozawa, Stochastic Features of Computer Viruses: Towards Theoretical Analysis and Simulation, Proceedings of the 5th St.Petersburg Workshop on Simulation, 2005 (pdf)

Hiroshi Toyoizumi, Evaluation method of download rate distribution in the multicast streaming, The 2005 Spring National Conference of ORSJ, 2005 (pdf)

Hiroshi Toyoizumi, Detect the Source of Worms with Spoofed Email Address, Technical Report of IPSJ, Vol.2004, No.62, 2004-EVA-9, pp.1-6, 2004 (pdf)

H. Toyoizumi and M. Takaya, Performance Evaluation of secure group communication, Journal of the Operations Research Society of Japan, Vol. 47, No. 1, 38-50, 2004 (pdf)

H. Toyoizumi and H. Tanaka, Optimal Merging Scheme of Multicast Streaming, TECHNICAL REPORT OF IEICE, NS2004-17, 33-36, 2004 (pdf)

Hiroshi Toyoizumi, Queues in genome, Communications of Operations Research of Japan, Vol. 47, No. 7, 413-417, 2004 (pdf)

Hiroyuki Tanaka and Hioshi Toyoizumi, Evaluating delivery rate of streaming server on (sigma, rho)-calculus, The Fifth Workshop on Internet Technology (WIT2003), 9 - 14, 2003 (pdf)

Toru Maeda and Hioshi Toyoizumi, Estimation of Web Server Load by Two HTTP-GET Packets, The Fifth Workshop on Internet Technology (WIT2003), 1-8, 2003 (pdf)

H. Toyoizumi, Performance Evaluation of Defense Strategies against Computer Virus, Seventh INFORMS TELECOM, 131-133, 2003 (pdf)

H. Toyoizumi and Y. Tanioka, An application of queueing theory to bioinfomatics, Proceedings of the queueing symposium, 20-28, 2003（pdf）

H. Toyoizumi, A. Kara, Predators: good will codes combat against computer viruses, ACM SIGSAC New Security Paradigms Workshop 2002. (pdf)

H. Toyoizumi, Performance Evaluation of Group Security, The Madrid Conference on Queueing Theory, Madrid 2002

H. Toyoizumi, Locally-Deterministic Evaluation of Traffic for Performance Guarantee, 11th INFORMS Applied Probability Society Conference, New York City, 2001

H. Toyoizumi, Link Sizing by Observation of Carried Traffic on the Internet, The Third Asia-Pacific Operations Research Societies Conferenece, 2000

H. Toyoizumi and T. Fujinami, Charging Based on Queue Observation, KORMS-INFORMS 2000

H. Toyoizumi, Modeling and Evalutation of Integrated Service Traffic, Performance Evaluation, Theory and Application 2000

H. Toyoizumi, J. G. Shanthikumar, and R. W. Wolff, Block Renewal Processes and Their Application to Modeling, Journal of the Operations Research Society of Japan, Vol. 41, No.1, 53 - 67, 1997

H. Toyoizumi, Sengupta's Invariant Relationship and Its Application to Waiting Time Inference, Journal of Applied Probability, Vol. 34, 795 - 799, 1997

S. Shioda, H. Toyoizumi, H. Yokoi, T. Tsuchiya and H. Saito, Self-Sizing Networks: A New Network Concept Based on Autonomous VP Bandwidth Adjustment, International Teletraffic Conference 15, 1997

H. Toyoizumi, Distribution Measurement of Delay by Sengupta's Invariant Relationship, ITC Specialist Seminar, 1995

H. Toyoizumi, S. Nogami, A. Inoue, Sizing by local traffic data in dynamic routing network, The 7th Joint conference on Communications, Networks and Switching Systems, 1994

H. Toyoizumi, A Simple Method of Estimating Mean Delay by Counting Arrivals and Departures," IEEE INFOCOM '93 (San Francisco), 1993 (pdf)

H. Toyoizumi, Evaluating Mean Sojourn Time Estimates for the M/M/1 queue," Computers and Mathematics with Applications, Vol. 24, No. 1/2,7 - 15, 1992

H. Toyoizumi, Continuous Dependence on Obstacles in Variational Inequalities, Functional Equations, Vol. 34, No. 1, 103 - 115, 1991 (pdf)

H. Toyoizumi, On the Measurement and Estimation of Stochastic Processes in Communication, Ph. D thesis, Waseda University，1998

H. Toyoizumi, On the Continuous Dependence on Obstacles in Variational Inequalities, master theis, Waseda University ,1989