Hiroyuki Okamura

ORCID

Publication Activity (10 Years)

Years Active: 2000-2024
Publications (10 Years): 64

Top Venues

Publications

Hiromu Yano, Tadashi Dohi, Hiroyuki Okamura
Performance Comparison of Software Reliability Estimation Algorithms. Computer 57 (4) (2024)
Jingchi Wu, Tadashi Dohi, Hiroyuki Okamura
Long-term software fault prediction with wavelet shrinkage estimation. J. Syst. Softw. 216 (2024)
Zilong Feng, Hiroyuki Okamura, Tadashi Dohi, Won Young Yun
Reliability Computing Methods of Probabilistic Location Set Covering Problem Considering Wireless Network Applications. IEEE Trans. Reliab. 73 (1) (2024)
Tadashi Dohi, Siqiao Li, Hiroyuki Okamura
Local polynomial software reliability models and their application. Inf. Softw. Technol. 166 (2024)
Xiujing Guo, Hiroyuki Okamura, Tadashi Dohi
Optimal test case generation for boundary value analysis. Softw. Qual. J. 32 (2) (2024)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
On the sensitivity of stationary solutions of Markov regenerative processes. Perform. Evaluation 164 (2024)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Hierarchical Dependability Modeling with Multi-State Systems. PRDC (2023)
Siqiao Li, Tadashi Dohi, Hiroyuki Okamura
Nonhomogeneous Markov Process Modeling for Software Reliability Assessment. IEEE Trans. Reliab. 72 (4) (2023)
Siqiao Li, Tadashi Dohi, Hiroyuki Okamura
Software reliability analysis via geometric de-eutrophication models with group data. Int. J. Syst. Assur. Eng. Manag. 14 (1) (2023)
Jingchi Wu, Tadashi Dohi, Hiroyuki Okamura
Tool Development of Daubechies Wavelet Estimation for Stochastic Counting Processes. DSA (2023)
Nanxiang Qiu, Siqiao Li, Tadashi Dohi, Hiroyuki Okamura
Another Look at Non-homogeneous Markovian Software Reliability Modeling. DSA (2023)
Xiujing Guo, Hiroyuki Okamura, Tadashi Dohi
Towards High-Quality Test Suite Generation with ML-Based Boundary Value Analysis. DSA (2023)
Yuto Kaibe, Hiroyuki Okamura, Tadashi Dohi
Towards Predicting Source Code Changes Based on Natural Language Processing Models: An Empirical Evaluation. ISSREW (2023)
Hisashi Kanda, Hiroyuki Okamura, Tadashi Dohi
A Note on Optimal Retraining Strategy for ML Systems. DSA (2023)
Jingchi Wu, Tadashi Dohi, Hiroyuki Okamura
Software Reliability Modeling Based on Zero-truncated and/or Zero-inflated Compound Distributions. DSA (2023)
Jiahao Zhang, Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Variance-Based Sensitivity Analysis for Markov Models using Moment Approximation. Int. J. Perform. Eng. 18 (5) (2022)
Xiujing Guo, Hiroyuki Okamura, Tadashi Dohi
Automated Software Test Data Generation With Generative Adversarial Networks. IEEE Access 10 (2022)
Chen Li, Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Hierarchical Bayesian Parameter Estimation of Queueing Systems using Utilization Data. Int. J. Perform. Eng. 18 (5) (2022)
Siqiao Li, Tadashi Dohi, Hiroyuki Okamura
Burr-type NHPP-based software reliability models and their applications with two type of fault count data. J. Syst. Softw. 191 (2022)
Chen Li, Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Parameter Estimation of Markovian Arrivals with Utilization Data. IEICE Trans. Commun. (1) (2022)
Jingchi Wu, Tadashi Dohi, Hiroyuki Okamura
W-SRAT: Wavelet-based Software Reliability Assessment Tool. QRS (2021)
Kenya Saiki, Shaoying Liu, Hiroyuki Okamura, Tadashi Dohi
A Tool to Support Vibration Testing Method for Automatic Test Case Generation and Test Result Analysis. QRS (2021)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi, Kishor S. Trivedi
Quantitative Security Evaluation of Intrusion Tolerant Systems With Markovian Arrivals. IEEE Trans. Reliab. 70 (2) (2021)
Xuanqing Chen, Tadashi Dohi, Hiroyuki Okamura
Investigating Trend/Cyclic/Clustering Decomposition in Software Fault Detection. QRS Companion (2021)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Age replacement with Markovian opportunity process. Reliab. Eng. Syst. Saf. 216 (2021)
Siqiao Li, Tadashi Dohi, Hiroyuki Okamura
A Comprehensive Evaluation for Burr-Type NHPP-based Software Reliability Models. DSA (2021)
Junjun Zheng, Hiroyuki Okamura, Taoming Pang, Tadashi Dohi
Availability importance measures of components in smart electric power grid systems. Reliab. Eng. Syst. Saf. 205 (2021)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Sensitivity Analysis of Software Rejuvenation Model with Markov Regenerative Process. ISSRE Workshops (2021)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
How Robust is the Optimal Software Rejuvenation Timing? ISSRE Workshops (2020)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Optimal Rejuvenation Policies for Non-Markovian Availability Models with Aperiodic Checkpointing. IEICE Trans. Inf. Syst. (10) (2020)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
A transient interval reliability analysis for software rejuvenation models with phase expansion. Softw. Qual. J. 28 (1) (2020)
Yepeng Cheng, Hiroyuki Okamura, Tadashi Dohi
A Comprehensive Performance Evaluation on Iterative Algorithms for Sensitivity Analysis of Continuous-Time Markov Chains. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (11) (2020)
Hiroyuki Okamura, Kazuya Morihara, Tadashi Dohi
An SMT-Based Perfect Sampling Algorithm for Stochastic Petri Nets. VALUETOOLS (2020)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Security Evaluation of a VM-Based Intrusion-Tolerant System with Pull-Type Patch Management. HASE (2019)
Chen Li, Hiroyuki Okamura, Tadashi Dohi
Parameter Estimation of $M_{t}/M/1/K$ Queueing Systems With Utilization Data. IEEE Access 7 (2019)
Takahiro Ushiroda, Tadashi Dohi, Yasuhiro Saito, Hiroyuki Okamura
A Point Process Approach of Bug Fixing Analysis in Open Source Software Projects. QRS (2019)
Jiahao Zhang, Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Moment-Based Approximation for Uncertainty Propagation in Fault Trees. PRDC (2019)
Hiroyuki Okamura, Tadashi Dohi
On Kolmogorov-Smirnov Test for Software Reliability Models with Grouped Data. QRS (2019)
Hiroyuki Okamura, Tadashi Dohi, Kishor S. Trivedi
Parametric Uncertainty Propagation through Dependability Models. LADC (2018)
Tadashi Dohi, Junjun Zheng, Hiroyuki Okamura, Kishor S. Trivedi
Optimal periodic software rejuvenation policies based on interval reliability criteria. Reliab. Eng. Syst. Saf. 180 (2018)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Component Importance Analysis of Mobile Cloud Computing System in the Presence of Common-Cause Failures. IEEE Access 6 (2018)
Yunlu Zhao, Tadashi Dohi, Hiroyuki Okamura
Software Test-Run Reliability Modeling with Non-homogeneous Binomial Processes. PRDC (2018)
Masataka Ozawa, Tadashi Dohi, Hiroyuki Okamura
How Do Software Metrics Affect Test Case Prioritization? COMPSAC (1) (2018)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
A Pull-Type Security Patch Management of an Intrusion Tolerant System Under a Periodic Vulnerability Checking Strategy. COMPSAC (1) (2018)
Kei Okumura, Hiroyuki Okamura, Tadashi Dohi
Software Reliability Modeling and Analysis via Kernel-Based Approach. ICECCS (2017)
Junjun Zheng, Hiroyuki Okamura, Lin Li, Tadashi Dohi
A Comprehensive Evaluation of Software Rejuvenation Policies for Transaction Systems With Markovian Arrivals. IEEE Trans. Reliab. 66 (4) (2017)
Hiroyuki Okamura, Tadashi Dohi
A Generalized Bivariate Modeling Framework of Fault Detection and Correction Processes. ISSRE (2017)
Hiroyuki Okamura, Tadashi Dohi
Dynamic Power Management With Optimal Time-Out Policies. IEEE Syst. J. 11 (2) (2017)
Hiroyuki Okamura, Junjun Zheng, Tadashi Dohi
A Statistical Framework on Software Aging Modeling with Continuous-Time Hidden Markov Model. SRDS (2017)
Miho Kawasaki, Hiroyuki Okamura, Tadashi Dohi
A Comprehensive Evaluation of Software Reliability Modeling Based on Marshall-Olkin Type Fault-Detection Time Distribution. APSEC (2017)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Performance Evaluation of VM-based Intrusion Tolerant Systems with Poisson Arrivals. CANDAR (2016)
Hiroyuki Okamura, Tadashi Dohi
A Phase Expansion Approach for Transient Analysis of Software Rejuvenation Model. ISSRE Workshops (2016)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Mean Time to Security Failure of VM-Based Intrusion Tolerant Systems. ICDCS Workshops (2016)
Hiroyuki Okamura, Tadashi Dohi
Phase-type software reliability model: parameter estimation algorithms with grouped data. Ann. Oper. Res. 244 (1) (2016)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Survivability Analysis of VM-Based Intrusion Tolerant Systems. IEICE Trans. Inf. Syst. (12) (2015)
Hiroyuki Okamura, Satoshi Miyata, Tadashi Dohi
A Markov Decision Process Approach to Dynamic Power Management in a Cluster System. IEEE Access 3 (2015)
Zhipeng Yi, Tadashi Dohi, Hiroyuki Okamura
Survivability Quantification of Wireless Ad Hoc Network Taking Account of Border Effects. PRDC (2015)
Hiroyuki Okamura, Jungang Guan, Chao Luo, Tadashi Dohi
Quantifying Resiliency of Virtualized System with Software Rejuvenation. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (10) (2015)
Hiroyuki Okamura, Zhipeng Yi, Tadashi Dohi
Network survivability modeling and analysis for power-aware MANETs by Markov regenerative processes. Telecommun. Syst. 60 (4) (2015)
Hiroyuki Okamura, Tadashi Dohi
Towards comprehensive software reliability evaluation in open source software. ISSRE (2015)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Component Importance Measures for Real-Time Computing Systems in the Presence of Common-Cause Failures. PRDC (2015)
Hiroyuki Okamura, Yuki Takekoshi, Tadashi Dohi
Fine-Grained Software Reliability Estimation Using Software Testing Inputs. QRS (2015)
Hiroyuki Okamura, Satoshi Miyata, Tadashi Dohi
Optimal Power-Aware Design in a Cluster System: Markov Decision Process Approach. UIC/ATC/ScalCom (2015)
Hiroyuki Okamura, Tadashi Dohi
mapfit: An R-Based Tool for PH/MAP Parameter Estimation. QEST (2015)
Hiroyuki Okamura, Yusuke Kunimoto, Tadashi Dohi
Coarse-Grained Parallel Uniformization for Continuous-Time Markov Chains. PRDC (2014)
Chao Luo, Hiroyuki Okamura, Tadashi Dohi
Performance evaluation of snapshot isolation in distributed database system under failure-prone environment. J. Supercomput. 70 (3) (2014)
Hiroyuki Okamura, Tadashi Dohi
A Novel Framework of Software Reliability Evaluation with Software Reliability Growth Models and Software Metrics. HASE (2014)
Hiroyuki Okamura, Ryo Watanabe, Tadashi Dohi
Variational Bayes for Phase-Type Distribution. Commun. Stat. Simul. Comput. 43 (8) (2014)
Toshitaka Koga, Tadashi Dohi, Hiroyuki Okamura
Optimal Reliability Design for Real-Time Systems with Dynamic Voltage and Frequency Scaling. PRDC (2014)
Shinya Ikemoto, Tadashi Dohi, Hiroyuki Okamura
Quantifying software test process and product reliability simultaneously. ISSRE (2013)
Bo Zhou, Hiroyuki Okamura, Tadashi Dohi
Enhancing Performance of Random Testing through Markov Chain Monte Carlo Methods. IEEE Trans. Computers 62 (1) (2013)
Hiroyuki Okamura, Hidenari Kishikawa, Tadashi Dohi
Application of deterministic annealing EM algorithm to MAP/PH parameter estimation. Telecommun. Syst. 54 (1) (2013)
Daisuke Kuwa, Tadashi Dohi, Hiroyuki Okamura
Generalized Cox Proportional Hazards Regression-Based Software Reliability Modeling with Metrics Data. PRDC (2013)
Hiroyuki Okamura, Tadashi Dohi, Shunji Osaki
Software reliability growth models with normal failure time distributions. Reliab. Eng. Syst. Saf. 116 (2013)
Hiroyuki Okamura, Tadashi Dohi
Dynamic software rejuvenation policies in a transaction-based system under Markovian arrival processes. Perform. Evaluation 70 (3) (2013)
Chao Luo, Hiroyuki Okamura, Tadashi Dohi
Modeling and Analysis of Multi-version Concurrent Control. COMPSAC (2013)
Gábor Horváth, Hiroyuki Okamura
A Fast EM Algorithm for Fitting Marked Markovian Arrival Processes with a New Special Structure. EPEW (2013)
Hiroyuki Okamura, Tadashi Dohi
SRATS: Software reliability assessment tool on spreadsheet (Experience report). ISSRE (2013)
Hiroyuki Okamura, Tadashi Dohi
Optimal Trigger Time of Software Rejuvenation under Probabilistic Opportunities. IEICE Trans. Inf. Syst. (9) (2013)
Chao Luo, Hiroyuki Okamura, Tadashi Dohi
Characteristic analysis of quantitative definition of resiliency measure. ISSRE (Supplemental Proceedings) (2013)
Hiroyuki Okamura, Chao Luo, Tadashi Dohi
Estimating response time distribution of server application in software aging phenomenon. ISSRE (Supplemental Proceedings) (2013)
Shinya Ikemoto, Tadashi Dohi, Hiroyuki Okamura
Estimating Software Reliability with Static Project Data in Incremental Development Processes. IWSM/Mensura (2013)
Shinya Ikemoto, Tadashi Dohi, Hiroyuki Okamura
Estimating software reliability via pseudo maximum likelihood method. SAC (2012)
Bo Zhou, Hiroyuki Okamura, Tadashi Dohi
Application of Markov Chain Monte Carlo Random Testing to Test Case Prioritization in Regression Testing. IEICE Trans. Inf. Syst. (9) (2012)
Tadashi Dohi, Hiroyuki Okamura, Kishor S. Trivedi
Optimizing Software Rejuvenation Policies under Interval Reliability Criteria. UIC/ATC (2012)
Xiao Xiao, Hiroyuki Okamura, Tadashi Dohi
NHPP-Based Software Reliability Models Using Equilibrium Distribution. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (5) (2012)
Satoru Ukimoto, Tadashi Dohi, Hiroyuki Okamura
Software testing-resource allocation with operational profile. SAC (2012)
Ryo Watanabe, Hiroyuki Okamura, Tadashi Dohi
An efficient MCMC algorithm for continuous ph distributions. WSC (2012)
Chao Luo, Hiroyuki Okamura, Tadashi Dohi
Model-Based Performance Optimization of Generalized Snapshot Isolation in Database System. UIC/ATC (2012)
Zhipeng Yi, Tadashi Dohi, Hiroyuki Okamura
Survivability modeling and analysis for a power-aware wireless ad hoc network. ICUMT (2012)
Junjun Zheng, Hiroyuki Okamura, Tadashi Dohi
Component Importance Analysis of Virtualized System. UIC/ATC (2012)
Hiroyuki Okamura, Tadashi Dohi
Optimization of Opportunity-Based Software Rejuvenation Policy. ISSRE Workshops (2012)
Kei Okumura, Hiroyuki Okamura, Tadashi Dohi
On the Effect of the Order of Test Cases in the Modified Exponential Software Reliability Growth Model. ICNC (2011)
Hiroyuki Okamura, Tadashi Dohi, Shunji Osaki
Bayesian Inference for Credible Intervals of Optimal Software Release Time. FGIT-ASEA/DRBC/EL (2011)
Hiroyuki Okamura, Yusuke Etani, Tadashi Dohi
Quantifying the Effectiveness of Testing Efforts on Software Fault Detection with a Logit Software Reliability Growth Model. IWSM/Mensura (2011)
Hiroyuki Okamura, Tadashi Dohi, Kishor S. Trivedi
A refined EM algorithm for PH distributions. Perform. Evaluation 68 (10) (2011)
Hiroyuki Okamura, Tadashi Dohi
A POMDP Formulation of Multistep Failure Model with Software Rejuvenation. WoSAR@ISSRE (2011)
Hiroyuki Okamura, Tadashi Dohi
Application of Reinforcement Learning to Software Rejuvenation. ISADS (2011)
Hiroyuki Okamura, Tadashi Dohi
Unification of Software Reliability Models Using Markovian Arrival Processes. PRDC (2011)
Hiroyuki Okamura, Tadashi Dohi, Shin'ichi Shiraishi, Mutsumi Abe
Composite dependability modeling for in-vehicle networks. DSN Workshops (2011)

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Publication Activity (10 Years)

Top Topics

Top Venues

Hiroyuki Okamura