著者

金 相賢 盛川 浩志 河合 隆史

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.21, no.1, pp.121-129, 2016

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The effects of moods and emotions on correlations with direction methods for stereoscopic 3D images are the focus of this study. Specifically, we investigated the sense of fear in different 2D and 3D conditions as well as the different directing methods involved. Directional techniques were sorted into three categories according to the dynamic characteristics of the focus object in 3D space along the Z-Axis, XY-Axis, and Fixed-Axis directions. The emotional value of fear was characterized in terms of two values, valence and arousal, which were measured using the Self-Assessment Manikin (SAM) and skin potential reaction (SPR). The results indicated considerable differences in terms of viewing condition, directing method, and gender. SAM measurements indicated low valence and high arousal scores in 3D viewing condition. Furthermore, the effects of directing methods depended on the center and range of 3D space. Depth representation was a more important factor for female than male subjects. The SPR frequency increased during viewing Z-Axis direction in 3D condition.

著者

盛川 浩志 太田 文也 金 相賢 河合 隆史

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.21, no.4, pp.617-625, 2016 (Released:2017-02-01)

参考文献数

12

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This paper reports on the effect of the physical state of the body on touch sensations caused by collisions with virtual objects. The collision of a virtual object with a user's body in a virtual environment may cause an illusory touch, or haptic, sensation. We hypothesize that a real-world touch sensation of moving air on skin may augment an illusory touch sensation created by the visual representation of a collision with an object in a virtual scene. To assess this hypothesis, we performed experiments evaluating touch sensation in three conditions: with the user's body covered, with the user's body uncovered, and when blowing air onto the user. Our results showed that a touch sensation was strongly induced in the condition where the user's body was uncovered. Furthermore, the effect of blowing air onto the user differed depending on the body part that was stimulated and the representation of the virtual object. These results suggest that the top-down and bottom-up information for illusory touch sensation such as the user's physical state and the touch sensation of the air on skin had affected each other.

著者

金 相賢 河合 隆史 小黒 久史 熊谷 隆夫 畑田 豊彦

出版者

一般社団法人 映像情報メディア学会

巻号頁・発行日

pp.14C-1, 2015 (Released:2018-05-18)

参考文献数

1

著者

金 相賢 盛川 浩志 三家 礼子 渡邊 克巳 河合 隆史

出版者

ヒューマンインタフェース学会

雑誌

ヒューマンインタフェース学会論文誌 (ISSN:13447262)

巻号頁・発行日

vol.18, no.4, pp.329-338, 2016-11-25 (Released:2019-07-01)

参考文献数

34

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We evaluated the effects of disparity conditions such as degree of crossed/uncrossed disparity on the preference occurring during the cognitive process of preference judgment by using psychological and physiological indices. First, we performed paired comparisons of 20 novel shapes without disparity in order to select eight stimuli with minimum bias during preference judgment. Second, we investigated the effects of parallax characteristics on the feeling of preference by using 24 stimuli created by adding three disparity conditions (0.3°, -0.3° and -1.1°) to the eight previously determined stimuli. Moreover, psychological indices were determined by paired comparisons of preference judgment and physiological indices were determined by measurements of eye movement, eye fixation time, and view count during the process of preference judgment. The paired comparisons showed that the participants preferred higher crossed disparity and higher parallax angles. The eye movement measurements showed that eye fixation time and view count increased during conditions of crossed disparity rather than uncrossed disparity, and this increase was directly proportional to the degree of parallax angle. We argue that the reasons for this may be related to the attraction of the crossed disparity and the familiarity and novelty that complements the addition of parallax.

著者

金 相賢 盛川 浩志 渡邊 克己 河合 隆史

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.21, no.4, pp.675-683, 2016 (Released:2017-02-01)

参考文献数

22

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In this study, the effects on concentration of attention, cognitive activity such as memory was examined in consideration of humans' cognitive characteristic over 3D images about the partial 3D image which changed a part of picture. The experiment of concentration of attention was carried out by measuring reaction time in visual search task using a simple visual target and eye fixation while viewing natural color image. On the other hand, the experiment of cognitive effect such as memory, the searching time until the changes are recognized were computed using the change blindness subject. That needs the cognitive activity of comparing by memorizing a picture temporarily while turning a look for detection of change. As a result, it was suggested by the partial 3D image that an object has the cognitive effect which is easy to go up to consciousness and to remain in memory.

著者

金 相賢 河合 隆史 窪田 悟 小黒 久史 熊谷 隆夫 畑田 豊彦

出版者

一般社団法人 日本人間工学会

雑誌

人間工学 (ISSN:05494974)

巻号頁・発行日

vol.51, no.Supplement, pp.S324-S325, 2015-06-13 (Released:2015-08-06)

著者

金 相賢 大和 裕幸

出版者

The Japan Society of Naval Architects and Ocean Engineers

雑誌

日本造船学会論文集 (ISSN:05148499)

巻号頁・発行日

vol.2000, no.188, pp.211-223, 2000 (Released:2009-09-16)

参考文献数

12

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In this paper, the longitudinal control system for full-submerged hydrofoil based on wave prediction was proposed to exclude human operation and to improve the performance of contouring waves. The proposed control system consists of optimal preview servo system, Kalman filter and generation of future reference input and future wave disturbance.In the proposed control system, the wave disturbance and the wave elevation were filtered and predicted by using sensor signals, Kalman filter, 30th linear prediction model and the augmented system. Then the future reference input and the future wave disturbance were generated by using predicted wave disturbance and wave elevation, and were used to calculate the feedforward control input in the optimal preview servo system. And also the future reference was modified based on the significant wave height for ship height control.The simulation results show that the proposed control system has good performance of contouring waves in the follow sea and the hydrofoil regulates heave and pitch motion in low significant wave height and contours the waves in high significant wave height without human operation. And also the experiment was performed to confirm the algorithm of filtering of wave disturbance and hydrofoil motion, and calculation of wave elevation.