著者

杉浦 明弘 高田 宗樹 敦賀 勝仁 山田 諭史 山本 哲也 宮尾 克

出版者

一般社団法人 日本人間工学会

雑誌

日本人間工学会大会講演集 日本人間工学会第50回記念大会

巻号頁・発行日

pp.174-175, 2009 (Released:2011-05-20)

著者

松浦 康之 高田 宗樹

出版者

日本衛生学会

雑誌

日本衛生学雑誌 (ISSN:00215082)

巻号頁・発行日

vol.71, no.1, pp.2-11, 2016 (Released:2016-01-30)

参考文献数

84

被引用文献数

1

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The use of stereoscopic images has been spreading rapidly. Nowadays, stereoscopic movies are nothing new to people. Stereoscopic systems date back to 280 A.D. when Euclid first recognized the concept of depth perception by humans. Despite the increase in the production of three-dimensional (3D) display products and many studies on stereoscopic vision, the effect of stereoscopic vision on the human body has been insufficiently understood. However, symptoms such as eye fatigue and 3D sickness have been the concerns when viewing 3D films for a prolonged period of time; therefore, it is important to consider the safety of viewing virtual 3D contents as a contribution to society. It is generally explained to the public that accommodation and convergence are mismatched during stereoscopic vision and that this is the main reason for the visual fatigue and visually induced motion sickness (VIMS) during 3D viewing. We have devised a method to simultaneously measure lens accommodation and convergence. We used this simultaneous measurement device to characterize 3D vision. Fixation distance was compared between accommodation and convergence during the viewing of 3D films with repeated measurements. Time courses of these fixation distances and their distributions were compared in subjects who viewed 2D and 3D video clips. The results indicated that after 90 s of continuously viewing 3D images, the accommodative power does not correspond to the distance of convergence. In this paper, remarks on methods to measure the severity of motion sickness induced by viewing 3D films are also given. From the epidemiological viewpoint, it is useful to obtain novel knowledge for reduction and/or prevention of VIMS. We should accumulate empirical data on motion sickness, which may contribute to the development of relevant fields in science and technology.

著者

山本 哲也 高田 宗樹 杉浦 明弘 鴨川 真也 村上 慶 宮尾 克

出版者

一般社団法人 日本人間工学会

雑誌

日本人間工学会大会講演集 日本人間工学会第50回記念大会

巻号頁・発行日

pp.176-177, 2009 (Released:2011-05-20)

著者

高津 和紀 高田 宗樹 平田 隆幸

雑誌

福井大学大学院工学研究科研究報告 (ISSN:18821871)

巻号頁・発行日

vol.67, pp.1-10, 2018-10

著者

高津 和紀 高田 宗樹 平田 隆幸

出版者

福井大学大学院工学研究科

雑誌

福井大学大学院工学研究科研究報告 (ISSN:2433815X)

巻号頁・発行日

no.68, pp.1-11, 2020-03

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Sota Fujii is a professional shogi player who has achieved renewal of historical records. As Fujii is a young man, his brain is in the growing stage. Therefore his ability of shogi is improving with his brain growth. Analysis using shogi AI characterizes the future of the player's shogi quantitatively. There is a possibility that we can detect the rapid growth of the young player by analyzing only a few games. In this study, Fujii's ability was evaluated by analysis of records of shogi using multiple shogi AI.

著者

高井 英司 青柳 隆大 市川 敬太 松浦 康之 木下 史也 高田 宗樹

出版者

一般社団法人日本衛生学会

雑誌

日本衛生学雑誌 (ISSN:00215082)

巻号頁・発行日

vol.77, pp.20012, 2022 (Released:2022-03-18)

参考文献数

23

被引用文献数

2

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Objectives: Olfactory stimulation elicits various physiological responses. However, few reports exist on the changes in gastric motility during olfactory stimulation in humans. In this regard, we carried out electrogastrography (EGG) to non-invasively measure the gastric myoelectrical activity, which regulates gastric motility. Moreover, subjective sensory evaluation was performed to determine which characteristics of vanilla odor at two different concentrations affect the myoelectrical activity.Methods: The participants consisted of eight healthy young males. EGG and electrocardiography (ECG) recordings were obtained approximately 20 min prior to and during olfactory stimulation. Autonomic nervous system activity was evaluated in terms of heart rate variability (HRV) and mean heart rate (HR) from ECG signals. EGG signals were analyzed by spectral analysis. In addition, the translation error was estimated by the Wayland algorithm. Sensory evaluation was performed using the Visual Analog Scale (VAS).Results: There were no significant differences in HRV and HR values and results of spectral analyses of EGG signals in all sample presentations. The translation error of EGG signals and the rating of perceived odor intensity significantly increased in a concentration-dependent manner. There was a strong positive correlation between translation error and odor intensity.Conclusions: The correlation found between translation error and odor intensity suggests that the higher the vanilla odor intensity was perceived, the greater the randomness of EGG signals was. Our results suggest that the application of the Wayland algorithm to EGG signals can be used as an objective indicator in odor evaluation.

著者

松浦 康之 高田 宗樹

出版者

一般社団法人日本衛生学会

雑誌

日本衛生学雑誌 (ISSN:00215082)

巻号頁・発行日

vol.71, no.1, pp.2-11, 2016

被引用文献数

1

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The use of stereoscopic images has been spreading rapidly. Nowadays, stereoscopic movies are nothing new to people. Stereoscopic systems date back to 280 A.D. when Euclid first recognized the concept of depth perception by humans. Despite the increase in the production of three-dimensional (3D) display products and many studies on stereoscopic vision, the effect of stereoscopic vision on the human body has been insufficiently understood. However, symptoms such as eye fatigue and 3D sickness have been the concerns when viewing 3D films for a prolonged period of time; therefore, it is important to consider the safety of viewing virtual 3D contents as a contribution to society. It is generally explained to the public that accommodation and convergence are mismatched during stereoscopic vision and that this is the main reason for the visual fatigue and visually induced motion sickness (VIMS) during 3D viewing. We have devised a method to simultaneously measure lens accommodation and convergence. We used this simultaneous measurement device to characterize 3D vision. Fixation distance was compared between accommodation and convergence during the viewing of 3D films with repeated measurements. Time courses of these fixation distances and their distributions were compared in subjects who viewed 2D and 3D video clips. The results indicated that after 90 s of continuously viewing 3D images, the accommodative power does not correspond to the distance of convergence. In this paper, remarks on methods to measure the severity of motion sickness induced by viewing 3D films are also given. From the epidemiological viewpoint, it is useful to obtain novel knowledge for reduction and/or prevention of VIMS. We should accumulate empirical data on motion sickness, which may contribute to the development of relevant fields in science and technology.

著者

高田 宗樹 宮尾 克 大森 正子 渡辺 智之 蛭田 秀一

出版者

一般社団法人電子情報通信学会

雑誌

電子情報通信学会技術研究報告. PRMU, パターン認識・メディア理解 (ISSN:09135685)

巻号頁・発行日

vol.101, no.653, pp.25-32, 2002-02-15

被引用文献数

4

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ジェットコースター乗車時の3次元動画映像を立位姿勢の健常な被験者に対して、音響の有無などいくつかの条件のもとに与え、重心動揺検査を同時に行った。本論では2次元重心動揺時系列を用い、音響付き立体画像の複合現実感に関する評価を行う方法論を提示する。この画像を知覚情報として持つ被験者の動揺図にはカスプ型運動成分の増加が認められたため、加速度ベクトルを解析に用いた。このベクトルの大きさがある閾値より大きい部分列を構成することにより、この運動成分を抽出することができる。この運動パターンの出現頻度が高い時間における被験者の視覚情報となった画像のコマを対応させて、与えた3次元立体画像のリアリティーについて評価を行った。