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Volume 36, Issue 3
Displaying 1-6 of 6 articles from this issue
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Pongthorn JITTACHALOTHORN2000 Volume 36 Issue 3 Pages 105-117
Published: June 15, 2000
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSIn order to propose the acceleration method of information memorization and the investigation method of the individual inclination, the simple manipulative task of “pick and place” has been performed with instructions available through a computer in this study. The detailed memorization curve is proposed to analyze the characteristic of memorization process and the effect of the information dividing methods on the memorization pattern. From the results of analysis, the distribution of S-type memorization can be used to investigate the variation of memorization process and the individual inclination. The combined work method of the middle preceding memorization process on the first half work elements and the neighborhood preceding memorization process on the latter half work elements is proposed as the efficient task guideline.View full abstractDownload PDF (8808K) -
Toshinori YAMAGUCHI, Kenji ITOH2000 Volume 36 Issue 3 Pages 119-130
Published: June 15, 2000
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSMost of major marine accidents were caused by human operator. Therefore, human behavior is greate importance to analysis for maritime safety. A simulation approach, for investigating critical risks under specific maneuvering conditions, has been recently utilized for its advantage to save cost and time. The present study constructs a cognitive model of a ship navigator based on the cognitive task analysis in which synchronized data from eye-movement recordings and verbal protocols was analyzed during a series of actual navigation sessions using a maritime simulator. The model describes a dynamic interaction between the navigator and the sates in maneuver and navigation environment for a course-tracking task in which a ship is navigated to follow a planned route as safety as possible in the narrow fairway. This model implemented on a Macintosh PC using a standard C code. The accuracy of the constructed model is examined by comparing the task performance simulated by the model with the observed performance by a human navigator on the maritime simulator. It could produce similar patterns of helm-command generations to those of the actual human navigator.View full abstractDownload PDF (8279K) -
Chizuru NAKAGAWA, Mieko OHSUGA, Takashi TAKEDA2000 Volume 36 Issue 3 Pages 131-138
Published: June 15, 2000
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSIn recent years, the virtual environments (VE) technology has rapidly developed and widely spread in various fields, while actualizing the problem of discomfort in and after using a VE system, for which measures to reduce and prevent the effect are strongly called. To discuss a method to evaluate the slight VE-sickness or the effect at a non-vomitus (pre-vomitus) level in simple and objective terms, we subjected 13 healthy adults to moving CG view point stimuli displayed on a 70-inch screen in a dark room for up to 15 minutes, collected data on the physiological responses including that of electrocardiogram (ECG) and respiration, and studied the relation between the indices thus obtained and the results of subjective evaluation of the discomfort levels. In this study, we observed characteristic phenomena that the slight VE-sickness decreases the respiration frequency and the mid-frequency components around 0.1Hz of heart rate variability (HRV), which are different from the physiological patterns seen in other types of stress response. These indices can be used to evaluate the slight discomfort of VE-sickness.View full abstractDownload PDF (3496K) -
Toshiyuki YAMASHITA, Hideaki SAKAI2000 Volume 36 Issue 3 Pages 139-145
Published: June 15, 2000
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSWe have been spending more time on interaction with computer systems in the information-oriented society. Human face-to-face interaction consists of both verbal communication and nonverbal communication such as facial expressions and gestures. Therefore we adopted facial expressions for human and computer interaction. We proposed a fuzzy reasoning model for selecting the face which expressed emotions caused by several situations. Nine faces with three levels of brow and eye deflection and three levels of mouth deflection were used to construct the fuzzy reasoning model in this study. The usefulness of the fuzzy reasoning model for selecting the faces through an experiment using a computer game as an example of the interaction between the computer and the user was discussed.View full abstractDownload PDF (830K) -
Temporal ringing patternKenji KURAKATA, Kazuma MATSUSHITA, Yasuyoshi KUBA, Yasuo KUCHINOMACHI2000 Volume 36 Issue 3 Pages 147-153
Published: June 15, 2000
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSThe auditory signals of electric home appliances were investigated to find the temporal ringing patterns that were frequently employed. The results of analysis showed the following: (1) Some appliances use the same tones for operation sounds that notify the user that the appliance is turned on or off. Since this may cause confusion to users, it is better to assign a different sound to each operation. (2) Although some appliances use different temporal patterns for each of these operations, the pattern is not consistent among the products. It is desirable that the temporal patterns be standardized among the various products made by different manufacturers. (3) Most of the appliances employ different durations of tones for the two purposes, indicating malfunction or mishandling, and signaling the appliance has finished working. However, since a similar rate of ringing is adopted for both signals, the user can confuse them. A higher rate of ringing may be suitable for alarm sounds to avoid confusion.View full abstractDownload PDF (4394K) -
Tetsuya HASEGAWA, Yoshinori HORIE2000 Volume 36 Issue 3 Pages 155-158
Published: June 15, 2000
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSDownload PDF (2748K)
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