The Japanese Journal of Ergonomics
Online ISSN : 1884-2844
Print ISSN : 0549-4974
ISSN-L : 0549-4974
Search
Advanced search
OR
Browse
Search
Volume 48, Issue 2
Displaying 1-6 of 6 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Contribution
  • A Study on Evaluation of Proficiency in Continuous Cell Production Works
    Shota HIRATA, Ryo KOGA, Yasuaki FUKUTA, Hiroaki YAMADA
    2012 Volume 48 Issue 2 Pages 55-61
    Published: April 15, 2012
    Released on J-STAGE: July 30, 2012
    DOIhttps://doi.org/10.5100/jje.48.55
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In this study, the process of learning cell production procedures was investigated by classifying the processes involved. In addition, the efficiency of the learning process was analyzed by rating the amount of work achieved. As a result, the value of achievement had a tendency to increase with an increase in the number of days. Furthermore, the achievement was examined by taking into account the working factor of cell production; there existed no difference in manual labor during the day, spanning a period of five days. However, an increase in the amount of intellectual labor was observed, and the relation between the tendency index and the rate of variability was examined. The results confirmed a negative correlation. From the above results, it was possible to present an evaluation model using which the learning efficiency of cell production workers could be estimated.
    View full abstract
    Download PDF (760K)
  • Estimation method of muscle forces of lower limb considering the role of antagonistic muscles and biarticular muscles
    –Estimation of muscle forces of lower limb during 3-dimensional jogging–
    Isamu NISHIDA, D. Gordon E. Robertson, Masato MAEDA, Tsuneo KAWANO, Ke ...
    2012 Volume 48 Issue 2 Pages 62-69
    Published: April 15, 2012
    Released on J-STAGE: July 30, 2012
    DOIhttps://doi.org/10.5100/jje.48.62
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    It is important to estimate muscle forces during human motions in the nonstressed and unrestrained conditions. In general, the musculoskeletal models that have been developed do not consider the functions of antagonistic muscles and biarticular muscles to estimate muscle forces. This study investigated a musculoskeletal model that considered those of the antagonistic muscles and biarticular muscles. In this model, muscles acting across the hip, knee and ankle joints were treated simultaneously. This study proposed the method to estimate muscle forces by treating the 3-dimensinal motion as the 2-dimensional motion on the lower limb during jogging with the help of the musculoskeletal model. Surface electromyograms (EMGs) of tibialis anterior, gastrocnemius, soleus, rectus femoris, vastus lateralis, semimembranosus, biceps femoris and short head and gluteus maximus were measured to validate the estimated muscle forces during jogging. The experimental results showed that the muscle forces estimated by the proposed method had a good agreement with the EMGs of msucles.
    View full abstract
    Download PDF (750K)
  • Characteristics of Item Recognition Performance of Subjective Contours
    Yuzo TAKAHASHI, Tetsuo MISAWA
    2012 Volume 48 Issue 2 Pages 70-78
    Published: April 15, 2012
    Released on J-STAGE: July 30, 2012
    DOIhttps://doi.org/10.5100/jje.48.70
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    To expand the screen area, it is effective to use the optical illusion phenomenon that multiplies information with a sense of depth. In this study, the characteristics of recognition performance to perceive subjective contours as objects that present information to humans were examined by using item recognition task. From the results of the experiment, it was observed that as the number of presented figures increased, the reaction time became longer and the percentage correctness deteriorated in all the induction methods. In particular, when the incompletion figure method was used to induce the subjective contour, the percentage correctness worsened when there were two or more presented figures, and the detection time (regression coefficient) became longer significantly when compared with other induction methods. In addition, when the presented subjective contour was perceived brighter than other subjective contours, the recognition performance deteriorated, because the detection of multiplexing of the subjective surface takes more time when compared with other induction methods. It is suggested that the optimal way to design an object for using the incompletion figure method is to importantly cater for the reduction of the subjective brightness contrast.
    View full abstract
    Download PDF (775K)
  • Development of Quantitative Evaluation Tool for Psychological Values in Children in Hospital
    Shinya TAZAKI, Akira OKAZAKI, Junko HATTORI, Toshiyuki YAMASHITA
    2012 Volume 48 Issue 2 Pages 79-85
    Published: April 15, 2012
    Released on J-STAGE: July 30, 2012
    DOIhttps://doi.org/10.5100/jje.48.79
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    It is rare to measure the psychological value of a person easily. However, if it is possible to measure it, it should be very useful for us to communicate with the physically handicapped persons and the persons who are not good at expressing their emotions feelings in hospitals and schools. If you can easily know the psychological value of a child in hospital easily, the child can undergo effective therapy and treatment according to his/her emotions. Under the present conditions, however, the treatments are based on the observation of the child's action and behavior by some nurses, and the tools which can measure the child's emotions have not been developed. The present study aims to develop the tool which can replace the psychological value of emotional change in the child with the physical value's change, and to examine its effectiveness and usefulness.
    View full abstract
    Download PDF (1017K)
Short communication
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top