The Japanese Journal of Ergonomics
Online ISSN : 1884-2844
Print ISSN : 0549-4974
ISSN-L : 0549-4974
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Volume 8, Issue 1
Displaying 1-6 of 6 articles from this issue
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  • System safety of ergonomic viewpoint and itsconsider
    M. Oshima
    1972 Volume 8 Issue 1 Pages 1-11
    Published: February 15, 1972
    Released on J-STAGE: March 11, 2010
    DOIhttps://doi.org/10.5100/jje.8.1
    JOURNAL FREE ACCESS
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  • On the man-machine systems safety
    [in Japanese], [in Japanese], H. Nagano, [in Japanese], [in Japanese], ...
    1972 Volume 8 Issue 1 Pages 12-19
    Published: February 15, 1972
    Released on J-STAGE: March 11, 2010
    DOIhttps://doi.org/10.5100/jje.8.12
    JOURNAL FREE ACCESS
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  • Prediction and analysis for system safety design
    M. Moriyama
    1972 Volume 8 Issue 1 Pages 21-26
    Published: February 15, 1972
    Released on J-STAGE: March 11, 2010
    DOIhttps://doi.org/10.5100/jje.8.21
    JOURNAL FREE ACCESS
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    Up to this time, system safety was required with an abstract presentation as “no hazard or should be safety”, but it now can not maintain the safety unless to be made sufficient preparation and counter-measure since present systems become increasingly complicated.
    Further, now system safety is required with the quantitative presentation as so as reliability and maintainability etc., and must be managed as holding the safety of not only hardware but the associated personnel through operation from production at system design period.
    This paper describes prediction and analysis for system safety design that should be done with step by step in order to achieve the design of system safety, and the outline of some of those techniques.
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  • Simulation in System Safety
    T. Ichida
    1972 Volume 8 Issue 1 Pages 27-34
    Published: February 15, 1972
    Released on J-STAGE: March 11, 2010
    DOIhttps://doi.org/10.5100/jje.8.27
    JOURNAL FREE ACCESS
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    Development of a system requires analysis and evaluation of safety of the system throughout each phase of concepet, manufacture, installation, operations, and maintenance. The evaluations measures are usually classified into three: calculation on paper, experiment with the real hardware, and simulation.
    The simulation method, however, would be the most effective in case the theoretical calculation is found difficult, or the experiment with the actual system proved to be unpractible in terms of economy, time or morality. This paper discusses; safety evaluation to be carried out in the development of a system, breaking down the phases into preliminary analysis, system definition, system design, manufacture and test, and operations; then give a general view of various simulation methods; and finally works out a simulation method for the safety evaluation of the system.
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  • Mathematical Modeling of Safety
    Y. Murayama
    1972 Volume 8 Issue 1 Pages 35-44
    Published: February 15, 1972
    Released on J-STAGE: March 11, 2010
    DOIhttps://doi.org/10.5100/jje.8.35
    JOURNAL FREE ACCESS
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    Fundamental mathematical expressions on system's safety are shown as followings:
    (i) System's safety can be replaced by system's reliability with its suitable definition.
    (ii) System's reliability can be represented as function of elements' reliabilities, of the system, though the function should be reduced according to the defintion of system's failure.
    (iii) It is difficult to express human characteristics as system's elements mathematically. It is expected to study it fruitfully in this area.
    (iv) Improvement of system's reliability is established by redundancies of system's construction and elements. There is a problem on optimal cost allocation.
    (v) Optimal cost allocation problems can be solved by Dynamic Programming Method if system's construction and characteristics of system's elements (especially effective sensitivities and cost functions) are known.
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  • Safety aspect from analysis of accident investigation
    I. Kuroda
    1972 Volume 8 Issue 1 Pages 45-57
    Published: February 15, 1972
    Released on J-STAGE: March 11, 2010
    DOIhttps://doi.org/10.5100/jje.8.45
    JOURNAL FREE ACCESS
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    Human performances resulted from accident investigation are not always the same as the human performances assumed at the design stage of the machines.
    Accident inquiry itself has many difficult points for drawing up the true image of human error, such as the charactor of investigation team, scientific reliability of investigation methods and validity of logic of representation of accident phenomena.
    However, from limited experience of aircraft accident inquiry on no gear landing and near miss, many human performances should be considered to have different pattern at the dynamic phase of man-machine system.
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