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Article type: Cover
2003 Volume 25 Issue 2 Pages
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Article type: Appendix
2003 Volume 25 Issue 2 Pages
i-ii
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Article type: Appendix
2003 Volume 25 Issue 2 Pages
iii-iv
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Article type: Index
2003 Volume 25 Issue 2 Pages
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Article type: Index
2003 Volume 25 Issue 2 Pages
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Kiyoshi NIKAWA
Article type: Article
2003 Volume 25 Issue 2 Pages
89-90
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Hiroshi OZAKI
Article type: Article
2003 Volume 25 Issue 2 Pages
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Kazutoshi MIYAMOTO
Article type: Article
2003 Volume 25 Issue 2 Pages
92-97
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Hideya MATSUYAMA
Article type: Article
2003 Volume 25 Issue 2 Pages
98-102
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Manabu SUGAWA, Hiroshi MATSUSHIMA, Tetsuaki WADA
Article type: Article
2003 Volume 25 Issue 2 Pages
103-109
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Masashi HAYASHI, Shinji NAKANO, Tetsuaki WADA
Article type: Article
2003 Volume 25 Issue 2 Pages
110-120
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Tetsuro HINO, Masaki TANAKA, Hiroshi OZAKI
Article type: Article
2003 Volume 25 Issue 2 Pages
121-126
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Zentaro HIROSE
Article type: Article
2003 Volume 25 Issue 2 Pages
127-131
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Yasuo SATO
Article type: Article
2003 Volume 25 Issue 2 Pages
132-138
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Kiyoshi NIKAWA
Article type: Article
2003 Volume 25 Issue 2 Pages
139-147
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Kazuhisa HAEIWA
Article type: Article
2003 Volume 25 Issue 2 Pages
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Hiromichi MUTOH
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2003 Volume 25 Issue 2 Pages
149-150
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Tsuneo HAMANO
Article type: Article
2003 Volume 25 Issue 2 Pages
151-165
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Hiroshi OZAKI
Article type: Article
2003 Volume 25 Issue 2 Pages
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Article type: Appendix
2003 Volume 25 Issue 2 Pages
167-168
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Article type: Appendix
2003 Volume 25 Issue 2 Pages
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Article type: Appendix
2003 Volume 25 Issue 2 Pages
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Article type: Appendix
2003 Volume 25 Issue 2 Pages
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Article type: Appendix
2003 Volume 25 Issue 2 Pages
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Article type: Appendix
2003 Volume 25 Issue 2 Pages
174-
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Yoshifumi SHIBATA, Yoshinobu SATO
Article type: Article
2003 Volume 25 Issue 2 Pages
175-192
Published: March 25, 2003
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Risk analyses are carried out by taking a vacuum-cleaner with a power-dusting brush as an example. Hazards of the vacuum-cleaner could pose a product-liability problem. Here, two countermeasures are supposed for product-liability prevention. These are an automated powerdusting-brash stopper and a sequential-switching-on mechanism. The hazards are analyzed using fault-trees. New techniques using both rigid and flexible priority-AND gates are introduced for the development of the fault-trees. Then, ideas of sequential minimal cut-sets are proposed. This is called advanced FTA (a…FTA). Finally, an estimation of the hazard-controllability of the systems with safety countermeasures is demonstrated with the proposed technique. It is made clear that the techniques of hazard-identification and sequential failure logic are essential for the risk analysis of man-machine systems.
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Takabumi FUKUDA, Kunihiro KUROI, Hisaji SHIMIZU
Article type: Article
2003 Volume 25 Issue 2 Pages
193-205
Published: March 25, 2003
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In order to reduce disaster rate due to machine in working place, new methodology in safety technology is expected. With this background, international standards on machine safety are highlighted. This paper concerns the function of safety devices for machines and their validation according to the standards. The purpose of this study is to understand core concepts included in them through a case-study. In this paper, 3 typical circuits for safeguards are focused and their safety functions are analyzed by FMEA, ETA, and FTA and importance index. Through this study, following points are shown:(1) procedure of categorization of safety devices, (2) importance of failure detection especially in Category 4, and (3) ranking of components by importance index.
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Tetsushi YUGE, Ayahito KAWAGUCHI, Shigeru YANAGI
Article type: Article
2003 Volume 25 Issue 2 Pages
207-217
Published: March 25, 2003
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In this paper we deal with a two-echelon repair system that the number of items in each base is given as a finite number. By observing the number of operating items and using iterative scheme, we proposed a new method to realize fast and accurate approximation. This model is a realistic model by taking transit times into consideration. Furthermore, we consider the case that there are condemnations of failed items in each base. By observing the number of discarded items and repairable failure items, we obtain the mean number of available items. In comparison with simulation result, the algorithms are accurate and computationally easy.
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Article type: Cover
2003 Volume 25 Issue 2 Pages
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Published: March 25, 2003
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