Okamura Hiroyuki

オカムラヒロユキ | Okamura Hiroyuki

Affiliation and department：

Research field (1)： Mathematical informatics

Research keywords (5)： Operations Research , Software Reliability Engineering , Reliability Engineering , Performance Analysis , Stochastic Model

Research theme for competitive and other funds (17)：

2020 - 2023 A Development of Perfect Sampling with SAT/SMT Solvers
2017 - 2020 Expansion of Applicability of Phase Approximation for Non-Markovian Models
2014 - 2017 Development of Scalable Algorithms of MRSPN/MRGP Analysis for the Automation
2011 - 2013 A Study on Reliability Assessment for Embedded OS
2009 - 2011 Software Reliability Evaluation under Quasi-Random Testing

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Papers (230)：

Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi. On the sensitivity of stationary solutions of Markov regenerative processes. Performance Evaluation. 2024. 102397-102397
Jing Wu, Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi. Optimal block replacement policies under replacement first and last disciplines. Proceedings of the 1st International Online Conference on Mathematics and Applications. 2023. 1-6
Li, Siqiao, Dohi, Tadashi, Okamura, Hiroyuki. Software reliability analysis via geometric de-eutrophication models with group data. INTERNATIONAL JOURNAL OF SYSTEM ASSURANCE ENGINEERING AND MANAGEMENT. 2023. 14. 1. 156-164
Chen Li, Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi. Performance Evaluation of a Cloud Datacenter Using CPU Utilization Data. Mathematics. 2023. 11. 3. 513-513
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi. Hierarchical Dependability Modeling with Multi-State Systems. PRDC. 2023. 268-277

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MISC (123)：

岡村寛之, 伊藤彰秀, 土肥正. An Empirical Study on Software Reliability Prediction Using Phase-Type Software Reliability Models (信頼性). 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報. 2017. 117. 253. 1-6
川崎美穂, 岡村寛之, 土肥正. An Extension of Software Reliability Models with Marshall-Olkin Type Distribution (信頼性). 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報. 2017. 117. 90. 13-18
Development of a Prototype of Phase-Type Software Reliability Assessment Tool on Spreadsheet. 2017. 117. 62. 7-12
A Quantitative Study on Bug Fixing Process in Open Source Software. 2016. 116. 367. 19-24
岡村寛之, 土肥正. A Note on Transient Analysis of Software Rejuvenation Model with Phase-Type Approximation (信頼性). 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報. 2016. 116. 260. 37-42

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Books (3)：

Education (3)：

Professional career (2)：

Work history (7)：

2018/04/01 - 2020/03/31 Hiroshima University Graduate School of Engineering Professor
2003/04/01 - 2018/03/31 Hiroshima University Graduate School of Engineering Associate Professor
2007/04/01 - 2010/03/31 Hiroshima University Graduate School of Engineering Associate Professor
2003/04/01 - 2007/03/31 Hiroshima University Graduate School of Engineering Assistant Professor
2001/04/01 - 2003/03/31 Hiroshima University Graduate School of Engineering Assistant

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Awards (5)：

2018/06/18 - IEEE Reliability Society Japan Joint Chapter IEEE Reliability Society Japan Joint Chapter 論文賞
2018/06/18 - IEEE Reliability Society Japan Joint Chapter IEEE Reliability Society Japan Joint Chapter 論文賞
2018/06/08 - ソフトウェア・シンポジウム2018 最優秀論文賞バグ修正時間を考慮したソフトウェア最適リリース問題についての一考察
2018/06/08 - ソフトウェア・シンポジウム2018プログラム委員長ソフトウェア技術者協会ソフトウェア・シンポジウム2018 最優秀論文賞
2004/02 - IEEE Reliability Society Japan Chapter "The IEEE Reliability Society Japan Chapter, Outstanding Young Scientist Award"

Association Membership(s) (6)：

Reliability Engineering Association of Japan , ACM , IEEE , ORSJ , IPSJ , IEICE

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