The Japanese Journal of Ergonomics
Online ISSN : 1884-2844
Print ISSN : 0549-4974
ISSN-L : 0549-4974
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Volume 51, Issue 2
Displaying 1-15 of 15 articles from this issue
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General remarks
Contribution
  • Quantitative Relationship between Tennis Server's Motion and Anticipation in Expert Players:
    Assessment by Using Temporal Occlusion Paradigm with Video Images
    Takahiro OGATA, Kazunobu FUKUHARA, Hirofumi IDA, Madoka TAKAHASHI, Tor ...
    2015 Volume 51 Issue 2 Pages 96-102
    Published: April 15, 2015
    Released on J-STAGE: July 14, 2016
    DOIhttps://doi.org/10.5100/jje.51.96
    JOURNAL FREE ACCESS
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    The aim of this study was to clarify the quantitative relationship between tennis server's motion and receiver's anticipation with a multiple regression analysis by using the racket's kinematic parameters as explanatory variables and anticipatory judgment of ball direction as a dependent variable. Twelve expert tennis players and 12 novice players scored their anticipatory judgment of the ball direction on a visual analog scale (VAS) of tennis serves after observing video images edited in a temporal occlusion paradigm. At occlusion onset before the moment of racket-ball contact, the correct responses of expert players were above chance level but not those of novice players. Furthermore, the result of the regression analysis on the expert players' VAS score showed that the racket's kinematic parameters explained 10.3% of the anticipated score of ball direction for expert players. This result indicates that there is a linkage between the server's racket kinematics and the expert's anticipation.
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  • Information Sharing at Health Care Service:
    Qualitative Study of Senders and Receivers on Handing-over
    Masato NAKAJIMA, Tomohiro FUKUHARA, Takuichi NISHIMURA, Motoyuki AKAMA ...
    2015 Volume 51 Issue 2 Pages 103-114
    Published: April 15, 2015
    Released on J-STAGE: July 14, 2016
    DOIhttps://doi.org/10.5100/jje.51.103
    JOURNAL FREE ACCESS
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    In this study, we aimed to obtain some guides to design a support system for handing-over at a health care service by analyzing some contents in a handing-over notebook which employees engaging in a health care service use in everyday work to tell information concerning their work. Therefore, we conducted a qualitative study for employees engaging in health care service as to using the notes. Concretely, we conducted the depth-interview for senders who frequently write in a handing-over notebook and receivers who use the notebook mainly for checking the information in which senders write. The results showed that the senders clearly wrote their directions and requests for other employees in the notebook with implying their implicit intention. On the other hand, the results of receivers showed that the receivers consider the notebook as only communication tools. These results suggest that receiver's understanding implicit intention of senders written in the notebook works effectively for keeping their service quality. Finally, we proposed the one-word labeling of sender's implicit intention to design the support system for handing-over at health care faculties based on these findings.
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  • Effect of Lumbar Support Belt on Working Posture
    Urara NISHIJIMA, Yusuke HABATATE, Hirokazu HATANO, Hiroyuki YAMADA, Te ...
    2015 Volume 51 Issue 2 Pages 115-122
    Published: April 15, 2015
    Released on J-STAGE: July 14, 2016
    DOIhttps://doi.org/10.5100/jje.51.115
    JOURNAL FREE ACCESS
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    This study focused on forward-bending postures that are frequently assumed during nursing work and aimed to experimentally evaluate how a lumbar support belt affects the working posture and physical load. In the experiment, conducted with 10 male participants, four experimental conditions were set up, and two lumbar support belt conditions (with-belt and without-belt) and two work heights (30% and 40% of the body height) were selected. Working postures were estimated using a three-dimensional attitude measurement sensor. The trunk was split into chest, abdomen, and pelvis. Muscle activities were measured by electromyography. Subjective complaints were recorded using a questionnaire survey. It was proved that the lumbar support belt combined the abdomen and pelvis, which restricted abdomen excursion. It was found that the trunk was bent forward by chest flexion in the with-belt condition, and by abdomen flexion in the without-belt condition. Consequently, the lumbar support belt reduced the compression force on the lumbar disc in forward-bending posture. Subjective complaints of back were also reduced in the with-belt condition, indicating improved easiness of work.
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  • Effects of Inhalation of 30% Oxygen on Autonomic Responses Elicited by Watching Oscillating Scenes
    Ryuzo YAMAGATA, Akira INOUE, Chiharu KUROZUMI, Hisashi TAKAHASHI, Tomo ...
    2015 Volume 51 Issue 2 Pages 123-130
    Published: April 15, 2015
    Released on J-STAGE: July 14, 2016
    DOIhttps://doi.org/10.5100/jje.51.123
    JOURNAL FREE ACCESS
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    Autonomic responses, which occur before sensation of nausea, can be elicited by watching oscillating scenes. This study was aimed to investigate whether inhalation of high concentration oxygen would influence these autonomic responses, which were elicited by watching a video containing oscillating scenes. Electrogastrogram (EGG), galvanic skin response (GSR), heart rate, SpO2 and respiratory rate were continuously recorded in 24 participants (20.9 ± 2.7 years), and they were asked to watch the video after a rest period. Half of the participants inhaled normal air (control group), and the remaining inhaled 30% oxygen (O2 group). No participants complained of nausea after watching the video. The integrated EGG just after watching the video was significantly larger than that before exposing the video in control group, however, such significant changes of the integrated EGG was not recognized in O2 group. The relative value of GSR (watching the video vs. a rest period) of O2 group during watching the video was significantly lower than that of control group. Heart rate, SpO2 and respiratory rate did not significantly change throughout the experiment. From these findings, it was concluded that increase of gastric motility and perspiration elicited by watching oscillating scenes might be suppressed by 30% oxygen inhalation.
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  • Relationship of Operation and Eye Movement in Flipping Back and Rereading E-Books on a Touch Panel Display
    Miho TAKASHIMA, Takuo MATSUNOBE, Naruki MITSUDA, Naoki FUKUYASU, Tsune ...
    2015 Volume 51 Issue 2 Pages 131-140
    Published: April 15, 2015
    Released on J-STAGE: July 14, 2016
    DOIhttps://doi.org/10.5100/jje.51.131
    JOURNAL FREE ACCESS
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    The aim of this research is to analyze eye movement in reading vertically written e-book with flipping back and rereading on a touch panel display. To track user's eye movement in reading e-book, an e-book reader has been implemented on the PC with a touch panel display. Using this reader, an experiment was conducted to examine eye movement in reading e-books with a touch interface on 3 size panels (4, 7 and 10 inch). The results were discussed by following aspects, size of display area, experience of touch devices, touch operation and direction of rereading. As a conclusion, characteristic gaze pattern with direction of rereading and using slider interface have been obtained.
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Short communication
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