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Volume 35, Issue 2
Displaying 1-8 of 8 articles from this issue
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Kentaro KOTANI, Etsuji TOKI, Ken HORII1999 Volume 35 Issue 2 Pages 69-77
Published: April 15, 1999
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSThe objective of this paper was to propose ‘Concentric interpolation’, a new interpolation technique for EEG potentials for imaging the brain activity. The major merits of this technique were: 1) Any points in the image can be interpolated by two-dimensional sampling theory, and 2) unlike ordinal techniques, any interpolated points do not depend on x-y coordinates. The technique was fully introduced and demonstrated by comparing estimated EEG potentials with empirically measured potentials at two typical locations (Cz and P4 defined by International 10-20 electrode system) when cognitive tasks were applied to the subjects. A total of 12 locations were used for generating two-dimensional images by concentric interpolation. Potentials estimated by the concentric interpolation were significantly closer to the measured potentials than those by the ordinal interpolation technique. With physical-restriction-free and intrusiveness-free characteristics, this technique using EEG signals can contribute especially to analyses and objective evaluation for ergonomically-oriented studies such as mental stresses and cognitive researches.View full abstractDownload PDF (2572K) -
Toshiyuki YAMASHITA1999 Volume 35 Issue 2 Pages 79-86
Published: April 15, 1999
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSIn the information-oriented society, we have been spending more time on interaction with computer systems. We adopted a computer game —the Breakout computer game— as an example of the interaction between the computer system and the user. In the original Breakout game, the player uses a mouse to control the position of the paddle on the lower side of the display. The paddle is used to bounce the ball against the wall of bricks on the upper side of the display. Each time the ball bounce off the wall, it knocks one brick out of the wall and adds to the score. The goal of the game is to knock out all the bricks. We constructed eight different versions of the game by varying the three features, that is, the number of the balls, breaking out the bricks, and showing the score on the display. We used Saaty's AHP (Analytic Hierarchy Process) procedure to evaluate how each feature determine whether the game was liked. The results from AHP revealed that the number of the balls, breaking out the bricks, and showing the score on the display had effects on the enjoyments of the sensorimotor skill, the visual stimulation, and the challenge of getting higher score, respectively.View full abstractDownload PDF (948K) -
Koji NAKASHIMA, Haruhiko SATO1999 Volume 35 Issue 2 Pages 87-95
Published: April 15, 1999
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSHuman personal distance against a mobile robot, which has been used in transportation work at hospitals, was studied by subjective report and heart rate measurement in experiments. The robot moved toward standing or sitting subjects at constant velocities from 0.2 to 1.0m/s from a distance 10m apart. Personal distance was reported by subjects who raised their hand at the moment when they first felt uncomfortable. Subjects were 21 male students. The personal distance was extended in proportion of the speed of moving robot. It is suggested that an increase in speed of robot enlarged personal space acting as a body-buffer zone by enhancing cognition of danger. At the speed of not slower than 0.8m/s of robot subjects' heart rate quickened after raising their hand. This is considered to be caused by psychological factor like fear.View full abstractDownload PDF (4062K) -
Tetsuo EMA, Yukio MIZUKURA1999 Volume 35 Issue 2 Pages 97-107
Published: April 15, 1999
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSThe stability augmentation systems are required to obtain adequte handling quality in dynamically unstable aircraft. In this paper, it is presented that a method is proposed to improve the manual handling quality of pilot's precise point tracking control of the VTOL aircraft at hovering by cooperative control for instrument visual tracking using a fixed base simulator experiment. Results indicate that the method setting pertient cooperative parameter can be used to manual precise control of the system.View full abstractDownload PDF (8167K) -
Naotsune HOSONO, Hiromitsu INOUE, Yutaka TOMITA1999 Volume 35 Issue 2 Pages 109-113
Published: April 15, 1999
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSDownload PDF (1369K) -
Kaoru SUZUKI1999 Volume 35 Issue 2 Pages 115-119
Published: April 15, 1999
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSDownload PDF (4733K) -
Isamu MOTOYOSHI, Yoshiaki NIHEI, Nakaho NUMATA1999 Volume 35 Issue 2 Pages 121-124
Published: April 15, 1999
Released on J-STAGE: March 12, 2010
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the comparison between the healthy persons and the patients of cerebral dysfunctionKaoru HONDA, Fukuyo HONDA1999 Volume 35 Issue 2 Pages 125-129
Published: April 15, 1999
Released on J-STAGE: March 12, 2010
JOURNAL FREE ACCESSDownload PDF (1936K)
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