On a Two-Unit Standby Redundant System with Standby Failure. - Shunji Osaki; Toshio Nakagawa (Oper. Res., 1971)

The Expected Number of Visits to State k before a Total System Failure of a Complex System with Repair Maintenance. - Toshio Nakagawa (Oper. Res., 1974)

A Model for Interaction of Two Renewal Processes with Threshold Level - Toshio Nakagawa; Shunji Osaki (Inf. Control., 1974)

A summary of optimum preventive maintenance policies for a two-unit standby redundant system. - Toshio Nakagawa; Shunji Osaki (Math. Methods Oper. Res., 1976)

Inspection policies for a computer with (n-1)/n parallel redundant system. - Kazumi Yasui; Toshio Nakagawa; Yoshiya Sawa (Syst. Comput. Jpn., 1986)

Optimal Policies for a Database System with Two Backup Schemes. - Cunhua Qian; Yu Pan; Toshio Nakagawa (RAIRO Oper. Res., 2002)

How much should we reweigh? - Hiroaki Sandoh; Toshio Nakagawa (J. Oper. Res. Soc., 2003)

Reliability consideration of a mobile communication system with network congestion. - Mitsutaka Kimura; Kazumi Yasui; Toshio Nakagawa; Naohiro Ishii (Comput. Math. Appl., 2006)

Optimal periodic testing policy for circuit with self-testing. - Satoshi Mizutani; Toshio Nakagawa; Kodo Ito; Hiroaki Sandoh (Comput. Math. Appl., 2006)

Optimal Maintenance Policies for a System With Multiechelon Risks. - Toshio Nakagawa; Kodo Ito (IEEE Trans. Syst. Man Cybern. Part A, 2008)

Random Checkpoint Models with N Tandem Tasks. - Toshio Nakagawa; Kenichiro Naruse; Sayori Maeji (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009)

A summary of maintenance policies for a finite interval. - Toshio Nakagawa; Satoshi Mizutani (Reliab. Eng. Syst. Saf., 2009)

Replacement and Preventive Maintenance Models with Random Working Times. - Mingchih Chen; Syouji Nakamura; Toshio Nakagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010)

Optimal Backup Interval for a Database System with Full and Periodic Incremental Backup. - Cunhua Qian; Yingyan Huang; Xufeng Zhao 001; Toshio Nakagawa (J. Comput., 2010)

A summary of periodic and random inspection policies. - Toshio Nakagawa; Satoshi Mizutani; Mingchih Chen (Reliab. Eng. Syst. Saf., 2010)

Replacement and inspection policies for products with random life cycle. - Won Young Yun; Toshio Nakagawa (Reliab. Eng. Syst. Saf., 2010)

Periodic and Random Inspection Policies for Computer Systems. - Mingchih Chen; Cunhua Qian; Toshio Nakagawa (FGIT-ASEA/DRBC/EL, 2011)

Reliability Consideration of a Server System with Replication Buffering Relay Method for Disaster Recovery. - Mitsutaka Kimura; Mitsuhiro Imaizumi; Toshio Nakagawa (FGIT-ASEA/DRBC/EL, 2011)

Replacement Policies with Interval of Dual System for System Transition. - Satoshi Mizutani; Toshio Nakagawa (FGIT-ASEA/DRBC/EL, 2011)

Two Generational Garbage Collection Models with Major Collection Time. - Xufeng Zhao 001; Syouji Nakamura; Toshio Nakagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011)

Stochastic Applications for e-Learning System. - Syouji Nakamura; Keiko Nakayama; Toshio Nakagawa (IIMSS, 2012)

Optimal Scheduling of Random Works with Reliability Application. - Mingchih Chen; Toshio Nakagawa (Asia Pac. J. Oper. Res., 2012)

Optimal Tenuring and Major Collection times for a Generational Garbage Collector. - Xufeng Zhao 001; Syouji Nakamura; Toshio Nakagawa (Asia Pac. J. Oper. Res., 2012)

Optimization problems of replacement first or last in reliability theory. - Xufeng Zhao 001; Toshio Nakagawa (Eur. J. Oper. Res., 2012)

Optimal imperfect preventive maintenance policies for a used system. - Xufeng Zhao 001; Toshio Nakagawa; Cunhua Qian (Int. J. Syst. Sci., 2012)

Optimization Problems of a Parallel System With a Random Number of Units. - Toshio Nakagawa; Xufeng Zhao 001 (IEEE Trans. Reliab., 2012)

Optimal study number of stochastic e-learning system. - Syouji Nakamura; Keiko Nakayama; Toshio Nakagawa (Int. J. Knowl. Web Intell., 2013)

Optimal redundant systems for works with random processing time. - Mingchih Chen; Toshio Nakagawa (Reliab. Eng. Syst. Saf., 2013)

Special issue on stochastic reliability and maintenance modeling with real applications. - Tadashi Dohi; Toshio Nakagawa (Reliab. Eng. Syst. Saf., 2013)

Reliability analysis of a replication with limited number of journaling files. - Mitsutaka Kimura; Mitsuhiro Imaizumi; Toshio Nakagawa (Reliab. Eng. Syst. Saf., 2013)

Optimal policies for cumulative damage models with maintenance last and first. - Xufeng Zhao 001; Cunhua Qian; Toshio Nakagawa (Reliab. Eng. Syst. Saf., 2013)

Comparisons of standby and parallel systems for processing times. - Mingchih Chen; Xufeng Zhao 001; Toshio Nakagawa (CSCWD, 2014)

A downloadable conditional access system for satellite broadcasting. - Yusei Nishimoto; Hiroyuki Kawakita; Chigusa Yamamura; Toshio Nakagawa; Tomoyuki Inoue (ICCE, 2014)

Augmented TV: An augmented reality system for TV programs beyond the TV screen. - Hiroyuki Kawakita; Toshio Nakagawa (ICMCS, 2014)

Optimal Replacement Last With Continuous and Discrete Policies. - Xufeng Zhao 001; Toshio Nakagawa; Ming Jian Zuo (IEEE Trans. Reliab., 2014)

A New Method of Utilizing Video Content Structured on the Basis of the RDF: Combining Broadcasting Content with External Services Using RDF Triples. - Makoto Urakawa; Masaru Miyazaki; Ichiro Yamada; Hiroshi Fujisawa; Toshio Nakagawa (NBiS, 2015)

My Health Dictionary: Study on Web Service using Program Information Data-hub as Linked Open Data. - Masaru Miyazaki; Makoto Urakawa; Ichiro Yamada; Kikuka Miura; Taro Miyazaki; Hiroshi Fujisawa; Toshio Nakagawa (ISWC (Posters & Demos), 2015)

Which is better for replacement policies with continuous or discrete scheduled times? - Xufeng Zhao 001; Satoshi Mizutani; Toshio Nakagawa (Eur. J. Oper. Res., 2015)

Overtime Replacement Policies with Finite Operating Interval and Number. - Satoshi Mizutani; Xufeng Zhao 001; Toshio Nakagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2015)

Optimal periodic and random inspections with first, last and overtime policies. - Xufeng Zhao 001; Toshio Nakagawa (Int. J. Syst. Sci., 2015)

Approximate methods for optimal replacement, maintenance, and inspection policies. - Xufeng Zhao 001; Khalifa N. Al-Khalifa; Toshio Nakagawa (Reliab. Eng. Syst. Saf., 2015)

Where does "whichever occurs first" hold for preventive maintenance modelings? - Xufeng Zhao 001; Hu-Chen Liu; Toshio Nakagawa (Reliab. Eng. Syst. Saf., 2015)

Some Considerations of Age Estimation Method for "Augmented TV" Based on Posture of Gripping Tablet PC. - Yuria Suzuki; Hiroyuki Kawakita; Michihiro Uehara; Toshio Nakagawa; Hiromitsu Nishimura; Akihiko Shirai (HCI (26), 2016)

Over-time and over-level replacement policies with random working cycles. - Xufeng Zhao 001; Toshio Nakagawa (Ann. Oper. Res., 2016)

A study about integrating video contents with web services based on the RDF. - Makoto Urakawa; Masaru Miyazaki; Ichiro Yamada; Hiroshi Fujisawa; Toshio Nakagawa (Int. J. Space Based Situated Comput., 2016)

What is Middle Maintenance Policy? - Xufeng Zhao 001; Khalifa N. Al-Khalifa; Abdel Magid S. Hamouda; Toshio Nakagawa (Qual. Reliab. Eng. Int., 2016)

Replacement policies for a parallel system with shortage and excess costs. - Xufeng Zhao 001; Mingchih Chen; Toshio Nakagawa (Reliab. Eng. Syst. Saf., 2016)

First and Last Triggering Event Approaches for Replacement With Minimal Repairs. - Xufeng Zhao 001; Khalifa N. Al-Khalifa; Abdel Magid S. Hamouda; Toshio Nakagawa (IEEE Trans. Reliab., 2016)

Age replacement models: A summary with new perspectives and methods. - Xufeng Zhao 001; Khalifa N. Al-Khalifa; Abdel Magid S. Hamouda; Toshio Nakagawa (Reliab. Eng. Syst. Saf., 2017)

Comparisons of replacement policies with periodic times and repair numbers. - Xufeng Zhao 001; Cunhua Qian; Toshio Nakagawa (Reliab. Eng. Syst. Saf., 2017)

Replacement policies with general models. - Mingchih Chen; Xufeng Zhao 001; Toshio Nakagawa (Ann. Oper. Res., 2019)

Which Replacement Is Better at Working Cycles or Number of Failures. - Satoshi Mizutani; Xufeng Zhao 001; Toshio Nakagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

Optimal inspection models with minimal repair. - Kodo Ito; Satoshi Mizutani; Toshio Nakagawa (Reliab. Eng. Syst. Saf., 2020)

Age and periodic replacement policies with two failure modes in general replacement models. - Satoshi Mizutani; Xufeng Zhao 001; Toshio Nakagawa (Reliab. Eng. Syst. Saf., 2021)

Periodic replacement policies with shortage and excess costs. - Xufeng Zhao 001; Mingchih Chen; Toshio Nakagawa (Ann. Oper. Res., 2022)

Preventive replacement policies for parallel systems with deviation costs between replacement and failure. - Xufeng Zhao 001; Satoshi Mizutani; Mingchih Chen; Toshio Nakagawa (Ann. Oper. Res., 2022)

A Revisit of Age-Based Replacement Models With Exponential Failure Distributions. - Xufeng Zhao 001; Butong Li; Satoshi Mizutani; Toshio Nakagawa (IEEE Trans. Reliab., 2022)

Data backup policies with failure-oblivious computing in reliability theory. - Xufeng Zhao 001; Dong Wang; Satoshi Mizutani; Toshio Nakagawa (Ann. Oper. Res., 2025)