著者

黒田 嘉宏 仲谷 正史 長谷川 晶一 藤田 欣也

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.16, no.3, pp.379-390, 2011

被引用文献数

1

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Ungrounded and light-weight force display is demanded for the daily use of a virtual reality system in a large space. The concern with a pseudo-force display, which displays limited or different physical stimuli compared with the reaction forces causing in real-world, has been growing as a solution for the last several years. This paper reports a research trend of pseudo-force displays for production of physical stimuli to fingers or a palm. We categorize the pseudo-force display according to the approach to induce similar sensation or event cognition to those in real-world. The problems derived from the features of the pseudo-force display are also discussed.

著者

黒田 嘉宏 金守 恒志 滝内 秀和 田ノ岡 征雄 黒田 知宏 大城 理

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. MI, 医用画像 (ISSN:09135685)

巻号頁・発行日

vol.108, no.385, pp.495-498, 2009-01-12

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術中ナビゲーションにおいて,術野の映像情報を損なわずにバーチャル画像を重畳することが重要課題である.本研究では,バーチャル画像内の物体構造理解と内視鏡画像内の表面情報理解を両立する,内視鏡位置に基づく動的な透過度制御法を提案する.あらかじめ設定された対象物体と内視鏡との距離に応じて内視鏡画像の局所領域における透過度分布パターンを動的に変化させ,その背後に存在するバーチャル画像を可視化する.腹腔鏡下腎摘除術を対象として,実験ファントムを用いた基礎評価を行った結果について報告する.

著者

小山 博史 柏木 公一 中口 俊哉 黒田 嘉宏 金井パック 雅子 井野 秀一 藤原 道隆 足立 吉隆 江頭 正人 松井 邦彦

出版者

東京大学

雑誌

基盤研究(A)

巻号頁・発行日

2020-04-01

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研修医や新人看護師など医療者のリアリティショックによるPTSDや早期離職が社会問題となっている。その理由の一つに臨床現場における多重課題に対する訓練不足が指摘されている。本研究では、現実世界での経験が困難な多重課題の臨床現場をバーチャルリアリティ(以下VR)技術を用いて仮想世界に再現し、多重課題シナリオを被験者(熟練者と初心者)に体験させ、その際の被験者の観察箇所や判断データを取得し、ヒューマンファクターデータとともにデータマイニング手法を用いた解析により多重課題における意思決定要因の解明と今後の臨床現場でのナビゲーションの基礎となる意思決定支援モデルの作成に関する研究を行う。

著者

加藤 雄樹 井村 誠孝 黒田 嘉宏 大城 理 南部 雅幸

出版者

公益社団法人 日本生体医工学会

雑誌

生体医工学 (ISSN:1347443X)

巻号頁・発行日

vol.50, no.1, pp.23-30, 2012-02-10 (Released:2012-07-13)

参考文献数

15

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Recently, in order to achieve the prevention or early detection of diseases, many studies have been carried out to measure physiological information in everyday life. The purpose of this study is to develop the mat-type device to measure physiological information fro6m the sole. ECG (Electrocardiogram) and PPG (Photoplethysmogram) that are the indices of the cardiovascular system were adopted as physiological information. ECG is measured by conductive coupling without using the paste and capacitive coupling that is able to obtain ECG and PPG with socks. PPG is obtained by measuring the reflected light to incident infrared light at periphery. PWV (Pulse wave velocity) which is the index of the arteriosclerosis is able to be calculated from ECG and PPG. The subjective experiment reveals that the developed system can measure ECG and PPG. In addition, the system can measure ECG and PPG in case of wearing socks. Moreover, by simultaneous measurement of blood pressure, PWV was calculated by the developed system and the good correlation was found between PWV and blood pressure. In addition, the experiment showed that the PWV were changed with the blood pressure changes due to exercise. Therefore, result of this experiment showed this system has the potential to monitor the condition of cardiovascular system, and suggested the possibility to estimate the blood pressure without compression by the cuff.

著者

八木 明日華 井村 誠孝 黒田 嘉宏 大城 理

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.17, no.4, pp.409-417, 2012-12-31 (Released:2017-02-01)

参考文献数

25

被引用文献数

1

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We propose a 360-degree interactive fog display which provides different images according to observers' position. The proposed display utilizes forward light scattering of fog. Due to the strong directional scattering, multiple images which are projected from different directions on a cylindrical fog screen can be transmitted to different observers. The fog display brings motion parallax to observers that can recognize the 3D structure of the presented objects. Another advantage of the fog display is that observers can insert their hands into the screen. This property gives the observers a consistent feeling of distance which comes from both visual and somatic sensations.

著者

八木 明日華 井村 誠孝 黒田 嘉宏 大城 理

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.17, no.4, pp.409-417, 2012

参考文献数

25

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We propose a 360-degree interactive fog display which provides different images according to observers' position. The proposed display utilizes forward light scattering of fog. Due to the strong directional scattering, multiple images which are projected from different directions on a cylindrical fog screen can be transmitted to different observers. The fog display brings motion parallax to observers that can recognize the 3D structure of the presented objects. Another advantage of the fog display is that observers can insert their hands into the screen. This property gives the observers a consistent feeling of distance which comes from both visual and somatic sensations.

著者

吉元 俊輔 黒田 嘉宏 井村 誠孝 大城 理

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.16, no.3, pp.307-315, 2011

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Tactile feedback of the quantified shape feature according the tactual exploration with an interface is required. Electrotactile display fits together with an input interface because of its small and simple stimulator. The level of the self-similarity is one of the quantified shape features of an object. In order to present a self-similar object, the electrotactile display which can control the sensation of the skin indentation is required. In this study, we proposed the representation of the skin indentation by modulating with pulse rate of the uni-stimulus to present self-similarity of an object. To calculate the stimulus according to the tactual tracing of an arbitrary surface, the simplified skin indentation is estimated and modulated by the pulse rate. Furthermore, the developed electrotactile mouse had an anode and a ground electrodes to present the stimulus at a fingertip during the manipulation. The relationship between pulse rate and the sensory intensity of the skin indentation and the discrimination of the dimension of the self-similarity were examined. The results indicated that electrotactile pulse rate modulation of the skin indentation was effective below the pulse rate 100pps, and users could discriminate the level of the self-similarity.

著者

黒田 嘉宏 大城 理 滝内 秀和

出版者

日本工業出版

雑誌

画像ラボ (ISSN:09156755)

巻号頁・発行日

vol.21, no.9, pp.43-46, 2010-09