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Volume 25, Issue 1
Displaying 1-9 of 9 articles from this issue
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Takeo YUKIMACHI, Yusaku OKADA1989 Volume 25 Issue 1 Pages 1-9
Published: February 15, 1989
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSOur intention in this paper is to investigate fundamental characteristics of human inching operation. In our investigation, we adopted a tracing model-task of a reference tarajectry by ON/OFF manipulation, which can be regarded as the most simple type of inching operation.
As the results from our experiments, we obtained that inching operation has the tendency called as the bath-tab-curve for D/C ratio, similar to human continuous operation, and there exist two types of inching operation, say, “Control by ON hold-time”, and “Control by OFF hold-time”.
Under each type of the operations, the reference of deviation in switching seems to have a great effect on manual control errors. From the facts described above, a simple model of human switching criteria was introduced and, to some extent, the validity of this model was confirmed by other verification experiments.View full abstractDownload PDF (1198K) -
Multivariate classification of body formReiko NINOMIYA, Yukiko HIGUCHI, Keiko CHIBA1989 Volume 25 Issue 1 Pages 11-18
Published: February 15, 1989
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSIn the Part 1 of our report, we were able to grasp the difference of body form between boys and girls, the growing-up amount and the growing-up speed. In this report, we discussed some multi-dimensional body form classifications.
(1) Classification by means of Kmeans method applied to normalized seven measurements.
(2) Classification by means of Kmeans method applied to 1st and 2nd canonical variates extracted by Canonical Discriminant Analysis.
(3) Classification given by Multiple Linear Discriminant Function.
We discussed characteristics on each classifications and the sex differencies studied by classification.View full abstractDownload PDF (7020K) -
a check-list for working wear of nurseShizuko NAGASHIO, Emiko NAKASONE1989 Volume 25 Issue 1 Pages 19-25
Published: February 15, 1989
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSThis paper proposes to a check-list for the hospital uniforms of nurse. The purpose of this check-list is to evaluate comfortability by working of nurses working wear for the stand point of movement. The main points of the check-list are as follows;
(1) The hospital uniforms are many problems, which is due to nurses body movement and how do they choose them.
(2) The clothing shape and feeling of tight are observed by change of movement of arms. Then the movements for check and the check-list for evaluation were selected.
(3) This check-list will be also available for choosing the other uniforms.View full abstractDownload PDF (2951K) -
Ching-lun HUANG, Junya OHASHI, Haruhiko SATO1989 Volume 25 Issue 1 Pages 27-32
Published: February 15, 1989
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSThe present study was undertaken to determine the maximum arm reach in terms of the anthropometric measurements. On ten Japanese adult men and ten women, whose stature ranged from the 5th to 95th percentile, fingertip reach of the 3rd digit was measured for the right and left arm at seven levels of work surface height. The radius of motion was defined as the distance from the center of the shoulder joint to the 3rd fingertip. The regression equation of the radius of motion on the upper limb length or the stature was obtained for each sex. Considering the real work situations, the equations determining the working area corrected by the 3rd digit length in the horizontal plane at a given working height were proposed. Comparison of the working area observed in Japanese and American literature with that obtained by the present equation suggests that the maximum arm reach can be determined from the upper limb length or the stature by the present equations for any working height.View full abstractDownload PDF (720K) -
Nobuo MIYASHIRO, Tatsumi KOSHIBA, Yoshimi YOKOMIZO1989 Volume 25 Issue 1 Pages 33-39
Published: February 15, 1989
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSThe present study examines the characteristics of the human limited motion which is defined as Microscopic Task (MsT). In this MsT, human operator would utilyze magnifying devices to aid visual control of microscopic movement.
The results can be summarized as follows. Movement Time (MT) was influenced by target diameter in the range of 0.4-2.0mm, and its' tendency of variation was like an exponential function. Especially, less than 1.2mm target diameter, MT was observed to be increased remarkably. Furthermore, there was no statistical significant effect on MT in the range of 2-20 magnifying power.
On the other hand, the Cycle Time was increased significantly for 100 magnifying power.View full abstractDownload PDF (854K) -
On the visual inspection taskKoki MIKAMI, Soichi IZUMI, Masaharu KUMASHIRO1989 Volume 25 Issue 1 Pages 41-52
Published: February 15, 1989
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSThe influences of sex on the fitness of visual inspection tasks dependent on workers' visual, judgment and hand and fingers functions were investigated from the viewpoint of psychophysiological functions, work efficiencies and feelings of fatigue. In this project, a combination of field research and a simulation experiment was utilized. The results obtainted were as followes;
(1) The work load in the visual inspection workshop showed the work load pattern often seen in the monotonous work. Moreover, the interesting findings were that female workers were adaptable to this work because of the low rate of complaints of Subjective Feelings of Fatigue (SFF), the sites of physical fatigue symptoms (SPFS) and Cumulative Fatigue Symptoms Index.
(2) In an experimentally designed visual inspection task, there were no significant differences in the ocular accommodation functions of male and female workers, though there were more complaints of SPFS by female workers. However, it was suggested that the cerebral cortex activity level in the female workers was higher, while the occurrence of weariness and the desire to change, feelings of fatigue and the low level of consciousness factor were lower than in the male workers. Furthermore, the ratio of errors of the inspected parts and the number of grasping errors of the female workers were lower than those of the male workers.
Judging from those two studies, it is thought that the fitness of the female workers on the visual inspection task are higher than that of the male workers.View full abstractDownload PDF (3610K) -
Motohiro OHKURA, Ichiro TANAKA, Takao OHKUBO1989 Volume 25 Issue 1 Pages 53-59
Published: February 15, 1989
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSA reading system was developed to aid adventitiously blind people in reading and writing English documents by themselves. The system is made up of three subsystems, i.e. pattern recognition, construction of character data base and speech output. This system has following features.
(1) Verbal guidance and confirmation are provided to enable blind users to operate the system by themselves.
(2) The users can build their own personal reading system by recording features of fonts through the subsystem of constructing character data base, though the help from the sighted is essential in this process.
(3) Since a simple editing function is embeded in the system, it can be used as a typewriter, as well as a text reversion system.
An evaluation of the system was made by a blind person, and a good result was obtained in his overall acceptance of the system.View full abstractDownload PDF (885K) -
Relationship between dot pattern and perceived numerosityToshiyuki YAMASHITA1989 Volume 25 Issue 1 Pages 61-66
Published: February 15, 1989
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSWhen an operator is required to view graphically displayed data on computer displays and to make various judgments, it is very important to understand how different display formats affect human judgment of the displayed data. As a step towards a clearer understanding of the effects of computer display formats on human judgment, the present study examined apparent dot numerosity on a computer display by means of magnitude estimation. The results are as follows.
(1) For all the display conditions, the number of dots was more underestimated as the dots increased.
(2) When the dots were scattered in an relatively large area with a surrounding frame, the dot numerosity was the least underestimated.
These results were discussed in terms of appropriate format of display.View full abstractDownload PDF (823K) -
Naotake HIRASAWA1989 Volume 25 Issue 1 Pages 67
Published: February 15, 1989
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSDownload PDF (110K)
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