著者

田中 信壽

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.10, no.1, pp.129-138, 2005

参考文献数

78

被引用文献数

6

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The health hazards posed by Virtual Reality (VR) environments can be divided into two groups based on their developing mechanism. The first group is related to optical stimulus load and is exemplified by Visual Display Terminal (VDT) Syndrome. The second group encompasses those caused by space information confusion and is exemplified by VR sickness. Among space information confusion induced hazards, VR sickness is especially serious because it can involve strong discomfort, headache, nausea and vomiting. Because VR sickness may prove to be a barrier to the spread of VR environments, it is thought that countermeasures are required. This paper reports the current state of VR sickness countermeasure knowledge. Research is summarized and organized mainly according to the following stories: "Cognition of VR sickness", "Mechanisms involved with the development of VR sickness", "Directions for countermeasure development" and "Evaluation of VR sickness".

著者

朝倉 宏 肴倉 宏史 田中 信壽 松藤 敏彦

出版者

北海道大学衛生工学会

雑誌

衛生工学シンポジウム論文集

巻号頁・発行日

vol.7, pp.70-75, 1999-11-01

著者

和田 浩志 村上 孝夫 田中 信壽 中村 昌司 斎木 保久 陳 秋明

出版者

公益社団法人 日本薬学会

雑誌

YAKUGAKU ZASSHI (ISSN:00316903)

巻号頁・発行日

vol.106, no.11, pp.989-994, 1986-11-25 (Released:2008-05-30)

参考文献数

23

被引用文献数

5 8

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From the fronds of Pseudocyclosorus subochthodes CHING and P. esquirolii CHING, a new flavanone glycoside (2S)-eriodictyol 7-O-methylether 3'-O-β-D-glucopyranoside (I) and maltol 3-O-β-D-glucopyranoside (V) were isolated. Besides them, from the former a new glycoside 5-hydroxymaltol 5-O-α-L-rhamnopyranoside (II) and (2E, 6E)-(10S)-2, 6, 10-trimethyl-2, 6-11-dodecatriene-1, 10-diol (12-hydroxynerolidol) (III) were isolated and from the latter astragalin and shikimic acid were isolated. Their structures were elucidated by chemical and spectroscopic methods.

著者

田中 信壽

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.10, no.1, pp.129-138, 2005-03-31 (Released:2017-02-01)

参考文献数

78

被引用文献数

1

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The health hazards posed by Virtual Reality (VR) environments can be divided into two groups based on their developing mechanism. The first group is related to optical stimulus load and is exemplified by Visual Display Terminal (VDT) Syndrome. The second group encompasses those caused by space information confusion and is exemplified by VR sickness. Among space information confusion induced hazards, VR sickness is especially serious because it can involve strong discomfort, headache, nausea and vomiting. Because VR sickness may prove to be a barrier to the spread of VR environments, it is thought that countermeasures are required. This paper reports the current state of VR sickness countermeasure knowledge. Research is summarized and organized mainly according to the following stories: "Cognition of VR sickness", "Mechanisms involved with the development of VR sickness", "Directions for countermeasure development" and "Evaluation of VR sickness".

著者

田中 信壽 高木 英行

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.11, no.2, pp.301-311, 2006-06-30 (Released:2017-02-01)

参考文献数

23

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We propose a design method of virtual reality (VR) environment for maximizing VR presence and minimizing VR sickness by controlling angular velocity and visual angle and evaluate this method. The system that materializes the proposed design method has two neural networks. One neural network (NN) learns user's VR sickness characteristics. Another NN learns user's VR presence characteristics. The optimum condition for user is calculated by combining these two NNs. First, we analyze the overall tendency and the individual variation about the VR sickness and presence characteristic of subjects. As a result, it was confirmed that these two characteristics are in the trade-off relationship and that the individual variation is large. Next, we evaluate the effectiveness of our proposed design method. This method had a potential to design VR environment that realize low VR sickness and high VR presence taking account of the difference of user's characteristics. Especially, this method worked effectively for subjects who develop heavy symptom of VR sickness.

著者

佐々木 通充 松藤 敏彦 松尾 孝之 田中 信壽

出版者

北海道大学衛生工学会

雑誌

衛生工学シンポジウム論文集

巻号頁・発行日

vol.10, pp.157-160, 2002-10-31