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Volume 23, Issue 6
Displaying 1-6 of 6 articles from this issue
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Osamu SUENAGA, Motozo IHARA1987 Volume 23 Issue 6 Pages 355-365
Published: December 15, 1987
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSThe basic analysis was carried out to discuss the effect of the human operator's control function on the one's control characteristics and this individual difference in a manual control tracking systems, by means of the small operation which consists of a non-operating and an operating part. The results obtained are as follows;
(1) The human operator's basic processing and operating function for the input information are able to be expressed by the small operation.
(2) According to the limit value of the control function, the human operators are divided into two groups, with the difference in the shape of the small operation etc.
(3) There is a negative correlation between the limit value of the control function and the controllability area which makes the individual difference clear.
(4) In the controllable systems, the control function relative to the limits of the controllability, is an useful index for the analysis of the repetitive effect of the trials and this individual difference, and this change, as the trial increased, is especially concerned with the learning speed.View full abstractDownload PDF (1078K) -
Kiyotoshi MATSUOKA1987 Volume 23 Issue 6 Pages 367-372
Published: December 15, 1987
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSAccording to Steinbach, pursuit eye movements during eye tracking reveal larger amplitudes when the observer himself moves a visual target than when he views a target moved independently of the observer's will. Steinbach attributed this improvement of the tracking performance to the transmittance of an efferent signal generating hand movements to the pursuit eye movement system. Meanwhile, it is known that the performance in eye tracking varies also according to the predictability of target movements. This paper presents an experiment suggesting that the mechanism of the improvement in tracking of the observer-moved target is the same as that in tracking of a predictable target.View full abstractDownload PDF (1783K) -
Yoshinori HORIE1987 Volume 23 Issue 6 Pages 373-383
Published: December 15, 1987
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSThis paper deals with the most suitable distribution of working hours with rest pauses for VDT workers from view points of their psycho-physiological reactions and work efficiency through the two series of the experiments.
From the results obtained, it can clearly be concluded that 60 minutes work with 10 minutes rest is the most recommendable for VDT workers to keep their fatigue level minimum and to increase their comfortability and productivity. And, it is also recommendable for those VDT workers working over 2 hours in a day should preferably take at least 15 minutes rest every 60 minutes work.View full abstractDownload PDF (1142K) -
Koki MIKAMI, Masaharu KUMASHIRO, Soichi IZUMI1987 Volume 23 Issue 6 Pages 385-396
Published: December 15, 1987
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSOn the precision solder work in a small-medium sized factory assembling small electronic parts, the characteristics of the work load and the influence of long-term working on workers were investigated through a field research and a simulation experiment.
1. The field research results:
(1) The tendency for the appearance of subsidiary behaviors (SB), and for the complaints of subjective feelings of fatigue (SFF) and the sites of physical fatigue symptoms (SPFS) were comparatively similar to the results of the simulation experiment. This suggested that the characteristics of work load in the solder workshop showed the work load pattern seen in monotonous work. In addition, the work load during working hours was rather heavy.
(2) The main task took 90%. The paced factors in the solder workshop were at extremely high levels.
(3) It was surmised from the magnitude of cumulative fatigue index and the complaints of SFF and SPFS before work that workers suffered from a chronic psychophysiological work load.
2. The simulation experiment results:
(1) The variations of CFF, SB, the heart rate and the complaints of SFF showed the work load pattern seen in monotonous work. Increasing the work load appeared to cause a lowering of the cerebral cortex activity level with the lapse of time.
(2) The complaints of SPFS were concentrated in the sites concerning the work characteristics and increased with the lapse of time. It is thought that the magnitude of the complaint rate is related to the duration of the period of work.
(3) The near-point accommodation showed a decrease in the ocular accommodation function response with the lapse of time.
Based on the results of these two investigations, work management from now on was discussed.View full abstractDownload PDF (1556K) -
Asao KOMACHIYA1987 Volume 23 Issue 6 Pages 397-401
Published: December 15, 1987
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSDownload PDF (1947K) -
Masamitsu OHSHIMA, Takao OHKUBO1987 Volume 23 Issue 6 Pages 403-409
Published: December 15, 1987
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSDownload PDF (2968K)
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