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Volume 29, Issue 5
Displaying 1-7 of 7 articles from this issue
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Satoru SHIBATA, Koutaro OOBA, Hikaru INOOKA1993 Volume 29 Issue 5 Pages 279-287
Published: October 15, 1993
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSIn this paper, characteristics of point-to-point movements of a human upper link are investigated. First, we examine movement without constraint on the target point. The results show that both the hand trajectory and the velocity pattern are consistent with the minimum jerk theory. Second, we examine movement which requires accuracy of positioning at the target point. It is found that the hand trajectory is straight as the minimum jerk theory. However, the velocity pattern differs from bell shaped velocity pattern explained by the minimum jerk theory, and has its peak in the first half of duration. When high accuracy of positioning is required, velocity peak position moves from the beginning of the duration toward the center of the duration with the number of trials and the duration decreases with the number of trials. Third, to examine movement which requires constraint on the arm posture at the target point, we conduct experiments that a human tries to grasp a glass. A roundabout trajectory around the target is observed. In addition, the similar velocity pattern as the above experiment is obtained. The duration becomes larger due to the roundabout trajectory.View full abstractDownload PDF (1055K) -
Hiroki SADATOKU, Mitsuo NAGAMACHI, Yukihiro MATSUBARA, Takehisa ONISAW ...1993 Volume 29 Issue 5 Pages 289-297
Published: October 15, 1993
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSThis paper is concerned with a fuzzy model of human error and error factors (PSF: Performance Shaping Factor). We propose an analytical method identifying relations between human error factors and degree of importance of them through the model. In order to treat mutual relationship between human error factors, we introduce the concept of Fuzzy Integral and Fuzzy Measure and use the natural language for estimation of PSF which is needed for identification of Fuzzy Measure. We extend this method by use of Extension Principle in order to treat a fuzzy set. As a case study, we analyze human error factors (PSF) concerning robot stoppage and check the validity of our analytical method.View full abstractDownload PDF (1036K) -
Yusaku OKADA1993 Volume 29 Issue 5 Pages 299-306
Published: October 15, 1993
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSThis paper intends to investigate manual control to change over the state of the system by touch operation. Compared the result of the experiments by touch operation with that by ON/OFF manipulation switch, it was obtained that it is difficult for subjects to adjust the controlled quantity in detail. So subjects group which has no experiences at control tasks by ON/OFF manipulation switch controls the system by rhythmic operation; that is, to change over the ON/OFF state of the switch indicated on CRT display according to a rhythm. In case of control by the rhythmic operation, subjects can decide to operate the switch by observing the trace of the controlled quantity after last change over the ON state of the switch. Therefore, even when the automatic control system is failed, or operator has not enough skill, if operator performs the rhythmic operation, one can easily predict the controlled quantity. From these results, we proposed the rhythmic operation as the one step to keep the desirable system-condition.View full abstractDownload PDF (2894K) -
Masahiko KATSUMI, Eitaro MASUYAMA1993 Volume 29 Issue 5 Pages 307-312
Published: October 15, 1993
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSThe purpose of this study is to compare the three stimuli which make people laugh. The results of discrimination analysis showed that Rakugo is very different from Manzai, and CM used in television is in between them. We analyzed the “funniness” points from following two aspects: First, about the points by each subjects, there was a significant correlation between Manzai and Rakugo, as well as between Manzai and CM. Second, about the degree of agreement of each subject's point with the mean of all subject's, a significant correlation was obtained between Rakugo and Manzai, as well as between Rakugo and CM. Those subjects whose points were close to the mean are thought to have a sense of humor. From these results it is suggested that in order to see whether a man will laugh much or not, it is valid to make him listen to Manzai, and to predict whether a man may have a sense of humor or not, it is valid to make him listen to Rakugo.View full abstractDownload PDF (678K) -
Takeshi OYAMA1993 Volume 29 Issue 5 Pages 313-319
Published: October 15, 1993
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSThe effects of indication of predicted locus were investigated by some experiment on the preview-predictive control system in which the whole reference-route and future controled value (predicted locus) were indicated on a two-dimensional display. As a result, indication of predicted locus greatly increase control performance, but the length of predictive locus, which makes best control performance, is changed by time constant of control system. And we can express the effect of indication of predicted locus exactly by proposing following two indices; one is dial control effort to refer the difficulty of control tasks, and the other is control variation to show the subject's behavior.View full abstractDownload PDF (888K) -
Hisayuki ISHIDA1993 Volume 29 Issue 5 Pages 321-327
Published: October 15, 1993
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSThe present paper deals with accuracy and error patterns in typing. Subjects are 5 visually impaired college students. In a trial, 40 to 50 words were asked to be typed and a total of 6 trials were carried out. Twenty three Alphabet keys and the “\” key were included in the words presented. Accuracy and error patterns were checked by comparisons between characters that were asked for and those actually typed characters. Accuracy in typing is 99.0 percent for the highest subject and 97.9 percent for the lowest one. Typing errors are divided into three patterns i. e. substitutions, insertions and omissions. Substitutions are further classified as follows. (1) typing a key that is adjacent to the correct key, (2) typing a key located on a mirror image position on the keyboard, (3) typing “u” or “i” instead of “\”, and (4) other substitutions. Insertions occur at the beginning, middle or ending of a word. The total omitted characters are twenty one and 6 of the characters are “\”. By comparisons with insertions and omissions, errors of substitutions are most numerous. Results obtained are discussed with relation to the importance of obtaining the correct key positions on the keyboard.View full abstractDownload PDF (872K) -
Akinori KOMATSUBARA1993 Volume 29 Issue 5 Pages 329-330
Published: October 15, 1993
Released on J-STAGE: March 11, 2010
JOURNAL FREE ACCESSDownload PDF (277K)
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