Updated on 2023/02/08

写真a

 
MAEDA Yoshinobu
 
Organization
Academic Assembly Institute of Science and Technology JOUHOU DENSHI KOUGAKU KEIRETU Professor
Graduate School of Science and Technology Electrical and Information Engineering Professor
Faculty of Engineering Department of Engineering Professor
Title
Professor
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Degree

  • Doctor(Engineering) ( 1998.3   Osaka University )

  • Master(Engineering) ( 1995.3   Osaka University )

Research Areas

  • Informatics / Intelligent informatics

  • Life Science / Rehabilitation science

Research History (researchmap)

  • Niigata University   Faculty of Engineering Department of Engineering   Professor

    2017.4

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  • Niigata University

    2015.10 - 2020.3

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  • Niigata University   Graduate School of Science and Technology Electrical and Information Engineering   Professor

    2015.5

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  • Niigata University   Faculty of Engineering Department of Biocybernetics Biomedical Engineering   Professor

    2015.5 - 2017.3

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  • Niigata University   Graduate School of Science and Technology Electrical and Information Engineering   Associate Professor

    2010.4 - 2015.4

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  • Hiroshima University   Visiting Associate Professor

    2007.4 - 2008.3

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  • Niigata University   Faculty of Engineering Department of Biocybernetics Biomedical Engineering   Associate Professor

    2005.9 - 2015.4

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  • Niigata University of Health and Welfare

    2004.4 - 2005.3

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  • Graduate School of Engineering Science, Osaka University   Special researcher of the Japan Society for the Promotion of Science

    1995.4 - 1998.3

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Research History

  • Niigata University   Faculty of Engineering Department of Engineering   Professor

    2017.4

  • Niigata University   Graduate School of Science and Technology Electrical and Information Engineering   Professor

    2015.5

  • Niigata University   Abolition organization Biomedical Engineering   Professor

    2015.5 - 2017.3

  • Niigata University   Graduate School of Science and Technology Electrical and Information Engineering   Associate Professor

    2010.4 - 2015.4

  • Niigata University   Abolition organization Biomedical Engineering   Associate Professor

    2005.9 - 2015.4

Education

  • Osaka University   Graduate School, Division of Engineering Science   物理系 生物工学分野

    - 1998.3

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    Country: Japan

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  • Osaka University   Faculty of Engineering Science   生物工学科

    - 1993.3

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    Country: Japan

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Professional Memberships

Committee Memberships

  • 日本生体医工学会   編集委員会 委員  

    2021.5   

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    Committee type:Academic society

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  • 電子情報通信学会   回路とシステム研究専門委員会 副委員長  

    2021.5   

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  • 日本生体医工学会   生体医工学シンポジウム論文 総編集委員長  

    2019.5 - 2021.4   

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    Committee type:Academic society

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  • 電子情報通信学会   FR誌編集委員  

    2019.5 - 2021.4   

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    Committee type:Academic society

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  • IEEE EMBS Japan Chapter   Treasurer  

    2019.1 - 2020.12   

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    Committee type:Academic society

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  • システム制御情報学会   第63回研究発表講演会プログラム委員  

    2018.6 - 2019.5   

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    Committee type:Academic society

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  • 電子情報通信学会   信越支部委員  

    2018.5 - 2020.4   

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    Committee type:Academic society

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  • 電気学会   非線形電子回路の高機能化技術調査専門委員  

    2018.4   

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    Committee type:Academic society

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  • 日本生体医工学会   甲信越支部大会実行委員  

    2018.4 - 2019.3   

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    Committee type:Academic society

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  • 新潟県高等学校総合文化祭ボランティア部門   評価委員  

    2017.11   

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    Committee type:Academic society

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  • 計測自動制御学会   ライフエンジニアリング部門シンポジウム2016プログラム委員  

    2016.4 - 2017.3   

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  • 文部科学省 私立大学戦略的研究基盤形成支援事業   地域・産学連携のためのライフイノベーション拠点形成シンポジウム 外部評価委員  

    2015.8   

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  •   非線形電子回路の集積化技術調査専門委員  

    2014.4 - 2017.3   

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  • 電子情報通信学会   HC特集号2013編集委員  

    2013.4 - 2014.3   

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    Committee type:Academic society

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  • 電子情報通信学会   HCGシンポジウム2013運営委員  

    2013.4 - 2014.3   

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    Committee type:Academic society

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  • 日本生体医工学会   甲信越支部大会 プログラム委員  

    2012.9   

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  • 電子情報通信学会   福祉情報工学研究会 幹事補佐  

    2012.5 - 2013.4   

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    Committee type:Academic society

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  • 日本生体医工学会   広報委員会 委員  

    2012.4   

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  •   DICOMO2011実行委員  

    2011.7   

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  • 電子情報通信学会   システムと信号処理サブソサイエティ 庶務幹事  

    2011.5 - 2013.4   

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  • 電子情報通信学会   回路とシステム研究会 幹事  

    2011.4 - 2013.3   

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  • 電子情報通信学会   基礎・境界 会誌編集委員  

    2011.4 - 2013.3   

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    Committee type:Academic society

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  • 電子情報通信学会   信越支部 互選代議員  

    2011.4 - 2012.3   

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    Committee type:Academic society

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  • 電子情報通信学会   信越支部 会計幹事  

    2009.4 - 2011.3   

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  •   第11回全国大会企画委員  

    2008.8   

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  •   6th Asian Symposium on Geographic Information Systems, Management Committee  

    2008.4   

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  • 電子情報通信学会   福祉情報工学研究会 専門委員  

    2007.5 - 2012.4   

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  •   ユビキタスコンピューティングシステム研究会 運営委員  

    2007.4 - 2011.3   

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  • 日本生体医工学会   生体医工学シンポジウム プログラム委員, 編集委員  

    2005.4   

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    Committee type:Academic society

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  • 日本生体医工学会   医療・福祉分野におけるヒューマンインタフェース研究会幹事  

    2004.4 - 2008.3   

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    Committee type:Academic society

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  •   第18回生体・生理工学シンポジウム実行委員  

    2003.10   

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Papers

  • 複雑ネットワークの観点から視覚探索が効率的であることを考察する

    前田 義信, 小澤 誠, 野村 泰伸, 塚田 章

    電子情報通信学会技術研究報告(MEとバイオサイバネティックス)   120 ( 301 )   18 - 23   2020.12

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    Language:Japanese   Publisher:(一社)電子情報通信学会  

    複数の文字(代替物)の中から特定の文字(ターゲット)を視覚的に探す作業を視覚探索と呼ぶ。代替物の数が増加しても視覚探索に費やす時間(探索時間)はそれほど増加しないことが知られており、視覚探索は効率的である。本研究ではネットワーク科学の用語を使って視覚探索が効率的になることを説明する。具体的には眼球運動を注視点時系列として計測し、文字盤上で注視点時系列が描く"注視点ネットワーク"の特性を分析した。その結果、注視点ネットワークにはスモールワールド性が内在しており、それゆえに任意の注視点間距離が相対的に小さくなることが示唆された。実際の探索平面が広くて文字数が多くても、注視点によって認知された文字間隔はスモールワールド性により小さくなる。すると探索時間も短縮され、視覚探索が効率的になるだろうと推察される。(著者抄録)

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  • 視覚探索時の注視点ネットワークが示すスモールワールド性 Reviewed

    宝財吉拉呼, 加賀谷文紀, 松井瑞季, 津野将行, 小澤誠, 野村泰伸, 塚田章, 前田義信

    電子情報通信学会論文誌   J103-A ( 7 )   142 - 151   2020.7

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

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  • A Model of Gaze Migration Optimizing Visual Search Reviewed

    小寺龍之介, 津野将行, 小澤誠, 野村泰伸, 塚田章, 前田義信

    生体医工学   56 ( 5 )   190‐197 - 197   2018.10

  • Quadruped locomotion patterns generated by desymmetrization of symmetric central pattern generator hardware network Reviewed

    N. Sasagawa, K. Tani, T. Imamura, Y. Maeda

    IEICE Trans., Fundamentals   E101-A ( 10 )   1658 - 1667   2018.10

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

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  • Measurement of eye movement in visual search for a target symbol and simulation to construct a small-world network Reviewed

    R. Kodera, S. Tanahashi, A. Iijima, Y. Maeda

    Advanced Biomedical Engineering   6   129 - 133   2017.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.14326/abe.6.129

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  • Implicit hidden small-world network that controls the movement of the eye in a visual search Reviewed

    Ryunosuke Kodera, Yoshinobu Maeda

    2017 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2017   2017-   1846 - 1849   2017.11

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Institute of Electrical and Electronics Engineers Inc.  

    In visually searching for a target symbol out of a number of alternatives, which may include not only symbols from the Latin alphabets but also Arabic, Greek, Chinese, Japanese, Greek, and Russian letters and numerals, and mathematical symbols, the time required to find the target, i.e., the response time, follows Hick's law, which states that the response time is proportional to the logarithm of the number of alternative symbols. How does movement of the human eye enable us to find the target in such a relatively short time? To examine this, we present a new hypothesis on the eye movement in a visual search, where the point of gaze, evaluated from movement of the eye across a monitor, is controlled by a hidden small-world network. First, in this study, we obtained experimental data for the points of gaze. A histogram of incremental movements of the point of gaze showed a power-law distribution. Then, using the histogram, we showed that the hidden network is a small-world one.

    DOI: 10.1109/SMC.2017.8122885

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  • マタニティ・ヨーガにおける妊娠末期女性の身体的・精神的変化の検証

    齊藤 里佳, 横野 知江, 奥田 明子, 飯島 淳彦, 今村 孝, 前田 義信, 木竜 徹, 内山 美枝子

    看護理工学会学術集会・看護実践学会学術集会・国際リンパ浮腫フレームワーク・ジャパン研究協議会学術集会合同学術集会プログラム・抄録集   5回・11回・7回   69 - 69   2017.10

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    Language:Japanese   Publisher:看護理工学会・看護実践学会・国際リンパ浮腫フレームワーク・ジャパン研究協議会  

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  • Construction of Web-Based Speech Game System “kikimimi” Reviewed

    Kentaro Tani, Masahiko Sato, Tatsuya Murakami, Ryosuke Kawachi, Takuya Niikawa, Yoshinobu Maeda

    Journal of Advanced Computational Intelligence and Intelligent Informatics   21 ( 2 )   359 - 362   2017.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Fuji Technology Press Ltd.  

    In this study, a web application of kikimimi, a game for visually-impaired persons, was created. The game rules were simplified to allow the visually-impaired to easily play it. This was verified in an experiment in which visually-impaired persons actually enjoyed the web application game. Moreover, it was confirmed that even the simplified version of the game was sufficiently entertaining.

    DOI: 10.20965/jaciii.2017.p0359

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  • 動画を用いた対人コミュニケーションにおける評価者の性別と被評価者の印象向上努力との関係 Reviewed

    前原謙一, 前田義信, 山﨑達也

    日本顔学会誌   16 ( 2 )   69 - 76   2016.11

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  • Three Gait Oscillations Switchable by a Single Parameter on Hard-Wired Central Pattern Generator Hardware Network Reviewed

    Akihiro Maruyama, Kentaro Tani, Shigehito Tanahashi, Atsuhiko Iijima, Yoshinobu Maeda

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E99A ( 8 )   1600 - 1608   2016.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    We present a hard-wired central patter generator (CPG) hardware network that reproduces the periodic oscillations of the typical gaits, namely, walk, trot, and bound. Notably, the three gaits are generated by a single parameter, i.e., the battery voltage E-MLR, which acts like a signal from the midbrain's locomotor region. One CPG is composed of two types of hardware neuron models, reproducing neuronal bursting and beating (action potentials), and three types of hardware synapse models: a gap junction, excitatory and inhibitory synapses. When four hardware CPG models were coupled into a Z(4) symmetry network in a previous study [22], two neuronal oscillation patterns corresponding to four-legged animal gaits (walk and bound) were generated by manipulating a single control parameter. However, no more than two neuronal oscillation patterns have been stably observed on a hard-wired four-CPG hardware network. In the current study, we indicate that three neuronal oscillation patterns (walk, trot, and bound) can be generated by manipulating a single control parameter on a hard-wired eight-CPG (Z(4) x Z(2) symmetry) hardware network.

    DOI: 10.1587/transfun.E99.A.1600

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  • An effect of production lifespan on markets using multi-agent similation Reviewed

    S. Onodera, N. Ito, Y. Maeda

    31st Int. Technical Conf. Circuits/Systems, Computers and Communications (ITC-CSCC 2016)   943 - 944   2016.7

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  • An effect of frequency-dependent behavior on bullying in school using multi-agent simulation model Reviewed

    Y. Nishida, Y. Maeda

    31st Int. Technical Conf. Circuits/Systems, Computers and Communications (ITC-CSCC 2016)   945 - 946   2016.7

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  • Simplified rule and alternative interface in web-based sound-play game system

    Murakami Tatsuya, Sato Masahiko, Maeda Yoshinobu, Tani Kentaro, Kawachi Ryosuke, Niikawa Takuya

    Transactions of Japanese Society for Medical and Biological Engineering   54 ( 28 )   S416 - S416   2016

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    Language:Japanese   Publisher:Japanese Society for Medical and Biological Engineering  

    <p>In order to contribute to the improvement of quality of life (QOL) for visually impaired persons, Niikawa has developed a sound-play-type game system, kikimimi. In general, it was impossible for the visually impaired to play the card games, because they have to recognize visually the patterns and digits printed on the cards. However, the kikimimi is a new table game system in the sense that the players play the card game with using only the auditory information. In this study we enhanced it to the web-based system on the internet. The developed game was too complicated to play for the visually impaired, especially, the aged and children, so that we simplified the rule of the game and evaluated the enjoyment using the flow state scale (FSS). As a result, it was suggested that the web game should be available to not only the visually impaired but the sighted.</p>

    DOI: 10.11239/jsmbe.54Annual.S416

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  • ハードウェア神経回路モデルを用いた輝度差変化がシュブルール錯視にもたらす影響の検討

    齋藤元喜, 前田義信, 秋田純一, 塚田 章

    電子情報通信学会技術研究報告   CAS2015-57   109 - 113   2015.11

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    Language:Japanese  

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  • Development of Game Controller for Voice Output Game System Reviewed

    R. Kawachi, T. Niikawa, Y. Maeda

    37th Annual International Conference (IEEE EMBC 2015)   2015.8

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE EMBS  

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  • Development of a storytelling assistive system for picture books using speech sounds for the visually impaired Reviewed

    Masahiko Sato, Ai Asai, Yoshinobu Maeda

    Transactions of Japanese Society for Medical and Biological Engineering   53 ( 1 )   40 - 43   2015.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Soc. of Med. Electronics and Biol. Engineering  

    Picture books are one of the elements of childcare that are indispensable for emotional development. The reading of picture books to children or grandchildren by their parents or grandparents plays an important role in enhancing their imaginative power. However, visually impaired parents often experience trouble in communicating the contents and details of picture books to their children, since they have difficulties not only in reading the stories but also in describing the pictures. In this study, we developed a storytelling assistive system to use with picture books for the visually impaired, which is based on a tablet terminal using speech sounds.

    DOI: 10.11239/jsmbe.53.40

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  • 投球動作における「胸の張り」の定量評価に関する基礎的検討 Reviewed

    福嶋祐一, 井田元樹, 林豊彦, 前田義信, 田中洋, 二宮祐樹, 駒井正彦, 信原克哉

    バイオメカニクス研究   19 ( 3 )   108 - 117   2015.6

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  • Influence of mutual concession of agents on evacuation behavior: simulation and theoretical approach Reviewed

    K. Tani, N. Ito, Y. Maeda

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences   J98-A ( 3 )   274 - 283   2015.3

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Institute of Electronics, Information and Communication Engineers  

    It is difficult for all evacuees to behave the smooth evacuation, when they are panicked in occurring some disaster. <br />
    Such a man-made disaster will increase the damage. <br />
    Evacuees have to give good influence to the global evacuation behavior by means that they evacuate calmly without preceding personal benefit. <br />
    A lot of computer simulations, especially the multi-agent simulation, or MAS, have tried to clarify the valuable knowledge for the smooth evacuation. <br />
    We also have made the MAS model on the evacuation behavior, and especially, investigated the influence of the mutual concession of the agents on the global evacuation time. <br />
    As a result, the global evacuation time was minimized when the $\alpha$ (= the probability of concession) was around 0.4, <br />
    or between 0.35 and 0.45. <br />
    If the evacuees give their way to the others by the probability 2/5, the evacuation time as a whole will be minimized. <br />
    This means that the evacuees may precede their personal benefits more than half of the event that they collided with each other.<br />
    Furthermore, we analyzed the $\hat{\alpha}$ that gave the minimum point of evacuation time, and obtained $\hat{\alpha}=\sqrt{2}-1$.

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  • Reproduction of Four-Leg Animal Gaits Using a Coupled System of Simple Hardware CPG Models Reviewed

    Hayate Kojima, Yoshinobu Maeda, Taishin Nomura

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E98A ( 2 )   508 - 509   2015.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG  

    We proposed a hard-wired CPG hardware network to reproduce the gaits of four-legged animals. It should reproduce walking and bounding, and they should be switchable with each other by changing the value of only one voltage.

    DOI: 10.1587/transfun.E98.A.508

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  • Hard-wired central pattern generator hardware network for quadrupedal locomotion based on neuron and synapse models Reviewed

    A. Maruyama, T. Ichimura, Y. Maeda

    Advanced Biomedical Engineering   4   48 - 54   2015.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Japanese Society for Medical and Biological Engineering  

    Many different quadrupedal walking patterns (gaits), such as “walking”, “trotting”, “bounding” and “galloping” can be generated by systems of coupled central pattern generators (CPG). However, the physiological mechanisms for the walking patterns are unclear. As a result, from an engineering viewpoint, many different mathematical models have been proposed to describe these walking patterns. In this report, we propose a hard-wired CPG network based on Rybak’s model that can reproduce quadrupedal locomotion walking patterns. In this network, we use the beating model proposed by Hoshimiya et al. and the bursting<br />
    model proposed by Maeda and Makino. The main purpose of this study was to reproduce the typical walking patterns; “walking” and “bounding”, with a hardware model, and to switch between these patterns using only one parameter, which can be interpreted as voltage stimulation from the midbrain locomotor region. We found the transition from the “walking” to the<br />
    “bounding” behavior to be due to a relative weakening of the coupling between the CPGs in the network by stimulation from the midbrain locomotor region.

    DOI: 10.14326/abe.4.48

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  • プレイヤの行動記録を用いた人工学級ゲームエージェントの行動設計 Reviewed

    前田 義信, 龍田 篤弥, 谷 賢太朗, 伊藤 尚, 加藤 浩介

    電子情報通信学会論文誌   J97-A ( 8 )   印刷中   2014.8

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

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  • Study on Designing Agent's Behaviors Using Artificial School Class Game Reviewed

    Kouki Yamamoto, Yoshinobu Maeda

    2014 IEEE 3RD GLOBAL CONFERENCE ON CONSUMER ELECTRONICS (GCCE)   202 - 203   2014

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE  

    We proposed a multi-agent and multi-player artificial school class game. This game has been designed to solve the bullying problem in school. Human players participate in the game and interact with other players, or agents, to make friends with those who have similar sense of values.

    DOI: 10.1109/GCCE.2014.7031323

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  • Development of a sensor network for continuous water-temperature evaluation -results obtained from experiments conducted in brackish lake-water- Reviewed

    Teruichi Ogata, Shinichi Sugawara, Yoshinobu Maeda, Hideo Makino

    IEEJ Transactions on Electronics, Information and Systems   134 ( 3 )   411 - 417   2014

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Institute of Electrical Engineers of Japan  

    Kamo Lake, located in Sado city, Niigata prefecture, Japan is approximately 4.9 km2 in circumference, 17 km in overall length, and 2 km across, at its widest point. While it is the largest lake in Niigata prefecture and ranks 46th in Japan, its deepest point lies about 10 meters below the surface. Being tidal in nature, with constant injections of seawater from the northern inlet, it has tended to be a bit brackish, making it suitable for the many oyster-farms dotting the area. But, the recent influx of red tide has resulted in a die-off of these oysters, costing local fishermen more than 100 million yen in lost revenue. Prefectural authorities have so far been unable to find a practical solution. The objective of the present research is to develop an original, automatic water temperature-sensing network in Kamo Lake to provide a web-based information-network that will allow fishermen to better understand the relationship between water temperature, red tides and dissolved oxygen. Based on our experimental results, we believe that the amount of dissolved oxygen has a clear connection with oyster die-off, and elevated water temperatures would seem to be the culprit. Network communications for water-temperature measurement achieved a 95% reliability-rating, for the past three years. ©2014 The Institute of Electrical Engineers of Japan.

    DOI: 10.1541/ieejeiss.134.411

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  • A study of the evacuation behavior simulation to investigate the effect of concessions and obstacles Reviewed

    Kentaro Tani, Yoshinobu Maeda, Nao Ito

    2013 IEEE 6th International Workshop on Computational Intelligence and Applications, IWCIA 2013 - Proceedings   63 - 67   2013

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    It is difficult for all evacuees to behave the smooth evacuation, if they are panicked in occurring some disaster. Such a man-made disaster will increase the damage. Evacuees have to give good influence to the global evacuation behavior by means that they evacuate calmly without preceding personal benefit. So far, a lot of computer simulations, especially using the multi-agent system, or MAS, have tried to clarify the valuable knowledge for the smooth evacuation. We also have made the MAS model on the evacuation behavior. Especially, we have investigated the influence of the mutual concession of the agents on the global evacuation time, which was the time all agents in some space completely evacuated to the outside. As a result, the global evacuation time was minimized when the a, the probability of the concession, was in the range between 0.3 and 0.5. Also, the global evacuation time was decreased more by means of placing obstacles near the exit. © 2013 IEEE.

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  • Construction of Four-Leg Robot Controlled by Hardware Central Pattern Generator Model

    Kojima Hayate, MAEDA Yoshinobu, Akita Junichi, Tsukada Akira

    BME   51   R - 121-R-121   2013

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  • Effects of conformity between the edge of the inside of plate and spoon on eating efficiency

    Abe Satomi, Hayashi Toyohiko, Maeda Yoshinobu, Akimoto Kouhei

    Journal of Japanese Association for an Inclusive Society   15 ( 3 )   A13 - A20   2013

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    Various kinds of tableware for the elderly requiring nursing care have been developed in recent super aging society in order to support their eating. Accordingly, usability assessment of such tableware has been done intensively up to now. As one of the usability factors, we focused on conformity between the edge of the inside of plate and spoon naturally affecting scooping motion. Its empirical analysis, however, has yet to be done sufficiently. In our previous study, we developed an effective experimental protocol using a combination of a spoon and a plate with an edge of its inside which is conformed well to the edge of the spoon. Using this protocol, we conducted experiments employing ten elderly subjects and a motion capture system in order to clarify the effects of the conformity on eating efficiency. Empirical results demonstrated that the conformity decreased the total number of scooping, the number of collecting and duration of the collecting phase as well as total time, strongly suggesting its significance in eating efficiency.

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  • Designing an electronic circuit model of the CPG with the afferent stimulation Reviewed

    Masahito Kubota, Yoshinobu Maeda, Akira Tsukada

    Transactions of the Japanese Society for Medical and Biological Engineering   50 ( 6 )   620 - 628   2012.12

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    Rhythm in biology such as walking patterns (gait) is thought as being controlled by a neural network called central pattern generator, or CPG. However, its mechanism from a viewpoint of physiology has not been clear. Rybak et al. (2006) proposed a neural network model of the CPG using Hodgkin-Huxley type equations, and showed that the dynamics calculated by their model reproduced the experimental results using the decerebrate cat. Furthermore, they made several improvements on their model by means of adding the afferent stimulations from the extensor and flexor sites. In this paper, we constructed a similar network model from the viewpoint of the electronic circuit design, and, as such, reproduce completely the dynamics obtained from Rybak's mathematical model. Using such hardware simulations, one can design and control walking patterns of the locomotion robot without using software program, and implement its real-time simulation.

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  • How Vergence Eye Movement and Stimulus Size Affect Depth Perception in Virtual 3D Environment Reviewed

    IIJIMA Atsuhiko, MATSUKI Kosuke, MAEDA Yoshinobu, HAYASHI Toyohiko, KIRYU Tohru, BANDO Takehiko

    BME   50 ( 6 )   681 - 686   2012.12

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    Recently, we easily access 3-dimensional (3D) entertainments, i.e. 3D broadcastings or 3D cinemas. Stereoscopic visions in humans use binocular and monocular depth cues such as binocular parallax, vergence, lens accommodation, size of visual object, shading, and so on. Strong depth cues, however, may affect human visual systems and it may induce dizziness or headaches. Then it should be very important to know optimal condition of depth cues and interaction within the cues. In this study, we focused on two depth cues;binocular parallax and object size. We investigated how these cues affect depth perception and the interactions of the cues. We stereoscopically presented two visual stimuli on a 3D TV for subjects and they were required to answer which stimulus was presented nearby them. They answered correctly when viewing normal size condition, i. e. nearer stimulus presented larger than the farther one. On the other hand, their performances dropped when they watched illusion-condition stimulus, i.e. farther stimulus presented larger than the nearer one. These results indicate the object size may one of the important factors for stereoscopic depth perception in the virtual 3D environments. The subjects were divided into two groups according to their performance (cutoff was 50% correct). We found vergence eye movements in the lower score subjects were dysfunctional, especially on convergence. Vergence functions may affect depth perception.

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  • 喉頭運動の視覚フィードバックを用いた喉頭挙上訓練 Reviewed

    佐藤将大, 覚嶋慶子, 林豊彦, 前田義信, 渡辺哲也, 道見登, 谷口裕重, 井上誠

    日本摂食・嚥下リハビリテーション学会誌   16 ( 3 )   235 - 242   2012.12

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  • Bullying Phenomena Reproduced by an Artificial School Class Model Reviewed

    Y. Maeda, K. Tani, N. Ito, K. Kato

    World Congress on Social Simulation   A1   1 - 10   2012.9

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  • Multi-Agent Simulation on Emergence of Another Money System Reviewed

    ITO Nao, HORIGUCHI Kohei, TANI Kentaro, MAEDA Yoshinobu

    The Transactions of the Institute of Electronics, Information and Communication Engineers. A   95 ( 9 )   707 - 715   2012.9

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  • Development of Autonomous Chewing-Movement Simulator <i>JSN</i>/3X Reviewed

    HAYASHI Toyohiko, KAWATA Mitsuhiro, NAKAJIMA Shinichi, INOUE Makoto, MAEDA Yoshinobu

    Biomechanisms   21 ( 16 )   179 - 191   2012.8

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    <p>In an attempt to better understand the mechanism of human jaw-movement, we have been developing an autonomous jaw-movement simulator, <i>JSN</i>, with a life-like anatomical structure and a physiological control scheme. We first set about the task of building a chewing-movement simulator, <i>JSN</i>/3X, by providing the latest <i>JSN</i> with 1) a mechanism adjusting bite force according to the stiffness of a given food article; 2) a feed-forward control mechanism for bite force; 3) adjustment of bite-force and temporomandibular joint loading, all of which are believed to be effective for promoting chewing efficiency. Chewing experiments using <i>JSN</i>/3X were carried out by employing two different food analogs, for the hard one, a rubber eraser, and for the soft one, a polyurethane earplug. Bite-force conditions were set such that the ratio of the maximum force in masseter and internal-pterygoid muscles on the chewing side to that on the non-chewing side were 0.8 or 0.4. Results suggested that 1) the food elasticity-based bite-force control was effective for promoting efficient mastication; 2) the feed-forward control transformed a chewing movement into a more life-like and effective one driven primarily by masseter and internal pterygoid muscles; and 3) activities of masseter and internal pterygoid muscles on the non-chewing side posses the capability of adjusting both bite force and temporomandibular joint loading on the chewing side, particularly when biting hard food.</p>

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  • Consideration of a social dilemma solution by multi-agent simulation using reinforcement learning Reviewed

    K. Tani, Y. Maeda, N. Ito

    ITC-CSCC   E-M1 ( 5 )   2012.7

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  • An Analog Circuit Neural Network Coupled by Lateral Inhibition Reproducing Chevreul Illusion Reviewed

    DOMON Tatsushi, MAEDA Yoshinobu, TSUKADA Akira, ITO Nao, TANI Kentaro, HAYASHI Toyohiko

    The Transactions of the Institute of Electronics, Information and Communication Engineers. A   95 ( 4 )   383 - 386   2012.4

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  • Evaluation of the Gini coefficients extended to the case which the sum of samples is negative Reviewed

    Nao Ito, Yoshinobu Maeda, Kentaro Tani, Toyohiko Hayashi, Michio Miyakawa

    SOCIOLOGICAL THEORY AND METHODS   27 ( 1 )   117 - 128   2012.3

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    The Gini coefficient is one of the indices most typically used to evaluate inequality amongst samples. However, it is inappropriate for evaluating inequality when negative samples are included in the population. This is because a precondition of the coefficient is that all samples must be positive. In order to enable the coefficient to evaluate inequality in such cases, Chen et al. attempted to extend it. However, their extended coefficient cannot be used to evaluate inequality when the sum of the samples is less than 0. In this paper, we extended the geometric expression of the Gini coefficient in order to enable it to be used to evaluate inequality even if the sum of the samples is less than 0. In addition, we confirmed that the extended coefficient was exactly equal to the Gini coefficient when all of the samples in the population were positive. Furthermore, we considered the algebraic expression of the extended coefficient, and using this, we clarified that the extended coefficient satisfied both Pigou-Dalton's population principle and the extended transfer principle.

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  • Development of PC games for use in rehabilitation - Relation between game button operation time and recovery stage of hemiplegia patients Reviewed

    Hiroyuki Hoshino, Yuuta Igarashi, Michio Miyakawa, Yoshinobu Maeda

    IEEJ Transactions on Electronics, Information and Systems   132 ( 3 )   7 - 390   2012

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    We have developed a rehabilitation tool used for treatment of patients suffering from hemiplegia and evaluation of the paralysis-stage. The tool consists of a PC and button switches for a computer game so that it is not expensive, available in anywhere, and possible to get a change of air in the patients. In this study, we have evaluated behavior indices such as an operation time to play with the games both in healthy young students and patients with paralysis. From experimental results, it was shown that the recorded behavioral indices showed the strong dependence on the motion control function of a subject. Preceding evaluation of effectiveness in rehabilitation of the developed tool, possible application of the tool in evaluation of the motion control function of the patients with hemiplegia was discussed in this paper. © 2012 The Institute of Electrical Engineers of Japan.

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  • A three-dimensional analysis of clavicular movement using Open-MR imaging and 3D/3D-registration Reviewed

    米谷直樹, 田中洋, 林豊彦, 前田義信, 渡辺哲也, 中村康雄, 二宮裕樹, 駒井正彦, 信原克哉

    バイオメカニズム学会誌   35 ( 2 )   123 - 129   2011.5

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    In order to figure out motion mechanism of human shoulder joint, we have been analyzing in-vivo shoulder movements, particularly humeral elevation within the scapular plane, using open-MR imaging and 3D/3D-registration technique. In this paper, we applied this method to analyze the clavicle motion relative to the chest. To do so, we have to establish the cheat coordinate system having high reproducibility using 3D MR imagines of the chest. Then we manually extracted the apexes of six ribs connected to the sternum and set the sternum coordinate system denoted as ΣST using these apex points. We evaluated reproducibility of ΣST in the following two respects: 1) the variation of six apex points extracted by five different testers from the same MR images; 2) the variation of the extracted apex points as well as ΣST in different humeral elevation angles. Consequently, the apex points as well as ΣST had a high reproducibility in a level of the slice interval of MR imaging in both the same images and the different images, demonstrating the applicability of ΣST to the clavicle motion analysis. Using this coordinate system, we tried to analyze the clavicle motion of four different subjects. The results agreed well with its previous reports in both respects of the direction and range of the clavicle motion.

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  • Quantitative Analysis on Usability of Button-Input Interfaces Reviewed

    Yoshinobu Maeda, Kentaro Tani, Nao Ito, Michio Miyakawa

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E94A ( 2 )   789 - 794   2011.2

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    In this paper we show that the performance workload of button-input interfaces do not monotonically increase with he number of buttons, but there is an optimal number of buttons in the sense that the performance workload is minimized. As the number of buttons increases, it becomes more difficult to search for the target button, and, as such, the user's cognitive workload is increased. As the number of buttons decreases, the user's cognitive workload decreases but his operational workload increases, i.e., the amount of operations becomes larger because one button has to be used for plural functions. The optimal number of buttons emerges by combining the cognitive and operational workloads. The experiments used to measure performance were such that we were able to describe a multiple regression equation using two observable variables related to the cognitive and operational workloads. As a result, our equation explained the data well and the optimal number of buttons was found to be about 8, similar to the number adopted by commercial cell phone manufacturers. It was clarified that an interface with a number of buttons close to the number of letters in the alphabet was not necessarily easy to use.

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  • Proposal of travel plan assist system and its usability evaluation Reviewed

    Y. Maeda, T. Maekawa, Y. Komo, N. Ito, T. Watanabe, T. Hayashi

    IEICE-D   J94-D ( 1 )   印刷中 - 241   2011.1

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  • Emergence of a few isolated agents in an artificial class based on the multi-agent system Reviewed

    T. Sato, Y. Maeda, N. Ito, K. Tani, K. Kato, T. Watanabe, T. Hayashi

    3rd World Congress on Social Simulation   2010.9

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  • Proposal for an Extended Gini Coefficient to evaluate samples of data that include negative values Reviewed

    N. Ito, Y. Maeda

    3rd World Congress on Social Simulation   2010.9

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  • Influence of Pre-exercise and Image Watching on Visually Induced Motion Sickness and Heart Rate Reviewed

    BORJIGIN Suritalatu, TOYAMA Hiroshi, KOSUGI Takeshi, KIRYU Tohru, HAYASHI Toyohiko, IIJIMA Atsuhiko, MAEDA Yoshinobu, YAMAZAKI Ken

    Transactions of Japanese Society for Medical and Biological Engineering   48 ( 1 )   98 - 105   2010.4

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    Visually induced motion sickness is one of the detrimental effects of video images on human psychosomatic state. Several studies for alleviating this effect have been cumulated in recent years. One of the studies reported that people with high heart rate tended to be immune to the motion sickness. This fact motivated us to assume that the increase of subjects' heart rate through physical exercise before video watching could prevent them from the motion sickness. Then we investigated the effects of video exposure with such pre-exercise on the motion sickness. First we recorded psychosomatic state of 23 volunteers using the simulator sickness questionnaire (SSQ) before and after watching extremely unpleasant video images of a mountain-bike ride capable of visually inducing motion sickness. Then we classified them into nausea and non-nausea groups, based on SSQ evaluation. Subjects' heart rate in nausea group increased gradually during video exposure, while that in non-nausea group was nearly constant. By imposing a 5-minute pre-exercise on 12 subjects in nausea group before video exposure, 10 subjects became immune to the motion sickness, demonstrating that the pre-exercise would be efficient for alleviating the motion sickness. In addition subjects' heart rate in nausea group remained at a higher level during video exposure than at rest, whereas it returned to the rest level immediately after the pre-excise without video exposure.

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  • An Effect of Afferent Stimulation Using a Hardware Model of a Central Pattern Generator Based on Neuronal Networks Reviewed

    Yoshinobu Maeda, Masahito Kubota, Satoshi Kaneko, Nao Ito, Kentaro Tani, Michio Miyakawa

    2010 5TH CAIRO INTERNATIONAL BIOMEDICAL ENGINEERING CONFERENCE (CIBEC 2010)   171 - 174   2010

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    This paper introduces hardware designs for a half-centered locomotor central pattern generator (CPG), composed of units reproducing the electrical behavior of neurons and synapses, such as action potentials, bursting discharges, and post-synaptic potentials. A typical phenomenon generated by the CPG is an alternating rhythmic activity of extensor and flexor sites, in the absence of external rhythmic input. In order to reproduce the phase resetting and non-resetting rhythmic activities observed after the afferent stimulation, a two-level CPG network and unit burst generators were proposed by Rybak et al. from an approach based on mathematical modeling. This paper confirms that such phase resetting and non-resetting rhythmic phenomena could be well reproduced by the hardware design of a two- level CPG using the electronic circuit simulator SPICE. In particular, it has been clarified that the phase resetting depends on the amount of stimulation of the extensor afferents during extension.

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  • Evaluation of an economic model composed of producer agents Reviewed

    Nao Itou, Yoshinobu Maeda, Toyohiko Hayashi

    IEEE, IWCIA2009   122 - 126   2009.11

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  • An Electronic Circuit Design of the Reciprocal Inhibition Neural Network Generating Walk Patterns Reviewed

    SOUZUKA Takuya, KANEKO Satoshi, MAEDA Yoshinobu, HAYASHI Toyohiko

    BME   47 ( 5 )   436 - 443   2009.10

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    A central pattern generator (CPG) is a half-center rhythm generator, which is constructed from neural networks of the spinal cord. The remarkable CPG's phenomena, observed in the experiments on the fictive locomotor activity of decerebrate cats, are that the rhythmic activity that re-emerges following a spontaneous omission of activity (deletion) is often not phase shifted. Rybak et al. (2006) propose a neural network model composed of multiple Hodgkin-Huxley type equations replicating such physiological phenomena. Maeda (2008) proposed a hardware design of the Rybak's mathematical model, using the SPICE simulation. Main purpose of this study is to reproduce dynamics of both the CPG and motoneuron networks using electronic circuits. As a result, the hardware CPG-motoneuron complex network showed the same response phenomena to the perturbation, which causes the deletion, as the mathematical model. Furthermore, the phase shift, observed after the perturbation to the rhythm generator of CPG, was nearly constant against increasing the amplitude of perturbation. The phase advanced about 0.2 seconds on average.

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  • Practical effectiveness of strategy in reinforcement learning agent model

    Nao Ito, Yoshinobu Maeda

    International Symposium on Fusion Tech 2009   58   2009.1

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  • Study on the relationship between usability and number of buttons of an interface console Reviewed

    Michio Miyakawa, Nozomu Koyama, Yoshinobu Maeda

    IEEJ Transactions on Electronics, Information and Systems   129 ( 10 )   1853 - 1858   2009

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    Usability, or easiness of operation of a console such as a universal remote console (URC), has been investigated in terms of the optimum number of buttons of the console which minimizes the operation time. The console operation is consisted of two major processes, that is, cognition of the button and motion of hand to press it. Cognitive workload would increase in accordance with the increase in number of buttons because difficulty in finding a correct button is increased. Conversely, physical workload would increase when number of buttons is decreased, because one has to press many times the same buttons in different meanings. Thus the optimum number of buttons which minimizes the total operation time of a console appears. To verify this hypothesis, several virtual consoles equipped with different number of buttons were developed on a PC. Subjects were asked to input designated family names in Roman alphabets. Easiness of operation, i.e. usability was evaluated by the operation time among 49 subjects. The operation time showed the minimum value when the number of buttons was approximately 18. © 2009 The Institute of Electrical Engineers of Japan.

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  • Research of Practical Indoor Guidance Platform Using Fluorescent Light Communication Reviewed

    Xiaohan Liu, Hideo Makino, Suguru Kobayashi, Yoshinobu Maeda

    IEICE TRANSACTIONS ON COMMUNICATIONS   E91B ( 11 )   3507 - 3515   2008.11

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    This article presents an indoor positioning and communication platform, using fluorescent lights. We set up a practical implementation of a VLC (Visible Light Communication) system in a University building. To finalize this work. it is important that we analyze the properties of the reception signal. especially the length of the data string that can be received at different walking, speed. fit this paper, we present a model and a series of formulae for analyzing the relationship between positioning signal availability and other important parameters, such as sensor angle, walking speed. data transmission rate, etc. We report a series of real-life experiments using VLC system and compare the results with those generated by the formula. The outcome is an improved design for determination of the reception area with more than 97% accurate signals, and an optimal transmission data length. and transmission rate.

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  • A hardware neuronal network model of a two-level central pattern generator Reviewed

    Y. Maeda

    Trans. Jpn Soc. Med. Biol. Eng.   46 ( 5 )   496 - 504   2008.10

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  • Fundamental Characteristic of an indoor navigation system using fluorescent light communication Reviewed

    X. Liu, H. Makino, Y. Maeda

    6th Asian Symposium on Geographic Information Systems from a Computer Science & Engineering Viewpoint   173 - 176   2008.5

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  • Addition of Function to presume landmark-based routes in the travel plan assist system Reviewed

    Y. Komo, Y. Maeda, T. Konishi, H. Makino

    6th Asian Symposium on Geographic Information Systems from a Computer Science & Engineering Viewpoint   154 - 159   2008.5

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  • 適応ファジィ推論ニューラルネットワークを用いた視覚障害者用学習型位置情報提供システム Reviewed

    小西孝史, 前田義信, 田野英一, 牧野秀夫

    生体医工学   46 ( 1 )   93 - 102   2008.2

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  • An Agent Model and its Gaming Simulation Reproducing the Emergence of a Minority Reviewed

    Yoshinobu Maeda, Nao Ito, Michio Miyakawa

    2008 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN AND CYBERNETICS (SMC), VOLS 1-6   2412 - +   2008

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    Bullying is a social problem that needs to be solved for happiness and well-being of the individuals. For junior high school students to make friends, it is very important that they find a common set of values, such as similar interests, the same hobbies, or some kind of common activity or striving. However, there is a minority of students who are unable to find a set of values in common with others, and these students are potential victims of bullying. To describe this phenomenon, we proposed a formalized agent-based model, both for the formation of a group and the exclusion of a minority, in order to clarify the mechanism by which a minority emerges. Secondly, in order to model real organizational and social phenomena, we upgraded the model to a hybrid multi-agent system consisting of both human and machine agents, in which a player could participate as in gaming. In this so-called multi-agent system model a player would be able to interact with the machine agents, which were controlled by the stochastic rules of the model. The game was made similar to amusement games by using interesting illustrations. We carried out a preliminary examination with a junior high school student playing the game and as a result, the appropriate number of parameters was determined.

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  • Relationships bewteen Usability and Number of Buttons of a Universal Remote Console - Preliminary Experimental Result Reviewed

    Michio Miyakawa, Yoshinobu Maeda, Nozomu Koyama

    2008 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN AND CYBERNETICS (SMC), VOLS 1-6   424 - +   2008

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    Usability, or easiness of operation of a console such as URC, has been investigated in terms of the optimum number of buttons of the console. The action of console operation is consisted of two major processes, that is, cognition of the button and motion of hand to press it. Ease of cognition will be decreased in accordance with increase in the number of buttons. Conversely, increased number of buttons will be useful for quick switch operation. Therefore, it is expected that the optimum number of buttons which minimizes the total operation time of a console exists. To verify this hypothesis, several virtual consoles equipped with different number of buttons were developed on a PC. Subjects were asked to input designated family name as input data by using those consoles and ease of operation was evaluated by the operation time among several subjects. As easily imagined, ease of operation, or usability in terms of the operation time showed the maximum value when the number of buttons was approximately 18 in this study.

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  • An attempt of a video magnifier controlled by the gazing information Reviewed

    Y. Maeda, M. Miyakawa, Y. Miyazawa, J. Hori, A. Okamoto, N. Ando

    The IEICE Transactions on Information and Systems   J90-D ( 3 )   715 - 723   2007.3

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  • Evaluation of practical usefulness of the video magnifier used key switches for character size control.

    Mochida Hiroshi, Miyazawa Yoichi, Miyakawa Michio, Maeda Yoshinobu

    Journal of Life Support Technology   19   172 - 172   2007

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    DOI: 10.5136/lifesupport.19.Supplement_172

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  • An Attempt of the Gaming Simulation for School Bullying Problem

    Nagasawa Miwako, Maeda Yoshinobu

    Journal of Life Support Technology   19   69 - 69   2007

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    DOI: 10.5136/lifesupport.19.Supplement_69

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  • Artificial Economic Divide Society Modeled by the Multi-Agent System

    Ikefuji Miyuki, Ito Nao, Maeda Yoshinobu

    Journal of Life Support Technology   19   143 - 143   2007

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    DOI: 10.5136/lifesupport.19.Supplement_143

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  • Development of central?scotoma simulator and its applicability to basic studies

    Yoshida Kenji, Miyakawa Michio, Maeda Yoshinobu

    Journal of Life Support Technology   19   173 - 173   2007

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    DOI: 10.5136/lifesupport.19.Supplement_173

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  • Development of a travel plan decision-making support system for the visually impaired Reviewed

    T. Miyaji, Y. Maeda

    Transactions of the Japanese Society for Medical and Biological Engineering   44 ( 4 )   635 - 642   2006.12

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    The ability to travel is important for disabled persons because it enables them to participate in social activities. Even though there is a wide range of technologies for supporting the visually impaired to travel, many of the technologies are under utilized. Part of the explanation lies in the behavioral patterns of many visually impaired who venture outdoors very little. To encourage travel, we have developed a system that selects travel routes suitable for visually impaired travelers. The algorithm uses an analytic hierarchy process (AHP)-one of many decision-making mathematical models-together with a digital map. The preferred or favored amenities of the traveler are reflected quantitatively in the travel route selection. Therefore, it is important to prepare the appropriate travel routes before making use of the system. In this paper, we asked 10 people with normal vision to quantitatively evaluate the preset travel routes automatically presumed by the system. As a result, it was verified that several travel routes prepared by our system were available for 70% of the users. Finally, we had two visually impaired people qualitatively evaluate the system from the user's viewpoint.

    DOI: 10.11239/jsmbe.44.635

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    Other Link: http://search.jamas.or.jp/link/ui/2007253875

  • A strategy to estimate liver fibrosis level based on vascular-structure analysis in CTAP Reviewed

    M. Ishikawa, H. Uchida, Y. Maeda, M. Yamamoto, M. Igarashi, T. Suda, M. Nomoto, Y. Aoyagi

    Medical Imaging and Information Sciences   23 ( 5 )   130 - 135   2006.12

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    Chronic liver disease causes health problem such as hepatic failure or hepatocellular carcinoma. As the disease progresses, some fibroses become apparent, and, as such, influence a vascular structure. We have proposed, previously, a method to extract various vascular features from CTAP images. In this paper we suggested that the method improved in this paper should be applicable to CTAP images of 9 patients. It reveals that the vascular-structure analysis can be useful for estimating liver fibrosis level.

    DOI: 10.11318/mii.23.130

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    Other Link: http://search.jamas.or.jp/link/ui/2008047878

  • An agent-based model for simulating the group dynamics involved in excluding a minority Reviewed

    Y. Maeda, K. Anezaki, Y. Takeuchi

    Proc. 1st World Congress on Social Simulation   1   79 - 86   2006.8

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  • A GIS-based technological assist for travel plans of the visually impaired Reviewed

    T. Miyaji, Y. Maeda

    CSUN 21st Annual International Conference, "Technology and Persons with Disabilities"   2006.3

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  • Guidance information method of a travel assistive system for pedestrians Reviewed

    T. Konishi, Y. Maeda, E. Tano, H. Makino

    Journal of the Japanese Society for Wellbeing Science and Assistive Technology   5 ( 2 )   34 - 42   2006.3

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    Other Link: http://search.jamas.or.jp/link/ui/2006265930

  • A smart video magnifier controlled by the visibility signal of a low vision user Reviewed

    Michio Miyakawa, Yoshinobu Maeda, Youichi Miyazawa, Junichi Hori

    2006 28TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-15   1157 - +   2006

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    A smart video magnifier for the people with visual disabilities is now being developed to assist their stress-free reading. In a video magnifier, the users watch the monitor screen that is displaying the book page to be read. Eye movement is needed for reading a book. The difficulty of character recognition that is dependent on the environmental conditions is reflected to the eye movement. Accordingly, information on the visibility of the user is extracted as physiological signals accompanied by the gazing motion. These signals are basically used to control the video magnifier. The advantages and usefulness of the adaptive-type video magnifier are discussed in this paper.

    DOI: 10.1109/IEMBS.2006.259900

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  • Evaluation of the preset travel routes in a self-determination support system Reviewed

    Yoshinobu Maeda, Takaaki Miyaji, Michio Miyakawa

    2006 28TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-15   1189 - +   2006

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    The ability to travel is important for disabled persons. It enables participation in social activities. Although there is a wide range of technologies for assisting the visually impaired to travel, they are under utilized. Part of the explanation lies in the behavioral patterns of many visually impaired who venture outdoors very little. To enable and encourage travel we have developed system to select a travel route that is suitable for a visually impaired traveler. The algorithm uses an analytic hierarchy process (AHP): one among the decision making mathematical models, used with a geographic information system (GIS). The preferred or favored demands of the traveler are reflected quantitatively on the travel route selection. Therefore, it is important to prepare the appropriate travel routes before making use of the system. In this paper we evaluated the preset travel route presumed automatically by the system, using 10 sighted participants as preliminary experiments. As a result, it was verified that several travel routes prepared by our system were available for 60% users.

    DOI: 10.1109/IEMBS.2006.259908

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  • An Attempt of the Gazing-Controlled Video Magnifier and its Evaluation Test

    Maeda Yoshinobu, Miyakawa Michio, Miyazawa Yoichi, Oyanagi Takayoshi

    Journal of Life Support Technology   18   92 - 92   2006

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    DOI: 10.5136/lifesupport.18.Supplement_92

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  • An agent based model on the bully of mobbed classmates Reviewed

    Y. Maeda, H. Imai

    The IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences   J88-A ( 6 )   722 - 729   2005.6

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  • Cardiac cell firings replicated by a simple circuit design Reviewed

    Y. Maeda, M. Miyakawa, H. Ohnabe

    1st Int. Conf. Complex Medical Engineering 2005   870 - 873   2005.5

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  • Synchronization with low power consumption of hardware models of cardiac cells Reviewed

    Y Maeda, E Yagi, H Makino

    BIOSYSTEMS   79 ( 1-3 )   125 - 131   2005.1

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    In a diffusively coupled system of mathematical models of cardiac cells, an acceleration phenomenon becomes apparent, with the period of the system becoming shorter than the periods of each isolated circuit. In order to investigate the energy or power consumption necessary to accelerate the oscillation of the coupled system, we propose an,electronic circuit oscillator model for cardiac cells with the action potential presented by square waves with plateaus of different duration. When the durations of the plateaus of the isolated circuits were set at different values, while keeping the periods the same, the coupled system was accelerated. As a result the power consumption was reduced by the coupling. A requirement for the acceleration driven by the lowest power consumption was that the duty cycle of the coupled system be equal to 0.4. This duty cycle can be physiologically observed in living cardiac cell tissue. This suggests that cardiac cells are self-organized so as to accelerate through the coupling of cells while the total power consumption is reduced to the minimum state. (C) 2004 Elsevier Ireland Ltd. All rights reserved.

    DOI: 10.1016/j.biosystems.2004.09.005

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  • Multi-Agent System for Voluntary Activity Simulation

    Ito Nao, Maeda Yoshinobu, Makino Hideo

    Journal of Life Support Technology   17   33 - 33   2005

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    DOI: 10.5136/lifesupport.17.Supplement_33

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  • Adaptive Video Magnifier Controlled by the Effective Eyesight of Low Vision Patients

    Miyakawa Michio, Maeda Yoshinobu, Tamaki Tohru, Hori Junichi

    Journal of Life Support Technology   17   38 - 38   2005

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    DOI: 10.5136/lifesupport.17.Supplement_38

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  • Development of decision making based travel route selection software for the visually impaired Reviewed

    Y. Maeda, T. Konishi, T. Matsuhashi, E. Tano, H. Makino

    Journal of the Japanese Society for Wellbeing Science and Assistive Technology   4 ( 1 )   29 - 37   2004.10

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  • An experimental approach to identify the key factors influencing pedestrian search behavior Reviewed

    Y. Maeda, A. Ikarashi, E. Tano, H. Makino

    Theory and Applications of GIS   12 ( 1 )   57 - 66   2004.7

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    In order to identify the key factors involved in pedestrian search behavior, we analyzed experimental data using statistical designs. Firstly a GPS-GIS-based search mechanism was used and search time, together with geographical characteristics of the town, luminosity and GPS accuracy with between 25.0m and 61.5m in SPS (Standard Positioning Service) were measured. Then the sense of direction of the subjects was derived from SDQ-S (Sense of Direction Questionnaire-Short Form). Statistical methods of regression and path analysis were applied to the data. Results from the analyses identified geographical properties such as the complexity of the road network and the geographical density of landmarks as being most influential in the pedestrian's search process. The accuracy of the GPS system itself was much less important.

    DOI: 10.5638/thagis.12.57

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  • Low-powered and accelerative synchronization in the coupled system of nonlinear hardware oscillators Reviewed

    Y Maeda, S Sakaguchi, H Makino, S Doi

    ELECTRONICS AND COMMUNICATIONS IN JAPAN PART III-FUNDAMENTAL ELECTRONIC SCIENCE   87 ( 12 )   1 - 9   2004

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    In a diffusively coupled system using a mathematical model of heart muscle, an acceleration phenomenon has been reported in which the oscillation period after coupling becomes smaller than the intrinsic period prior to coupling. In the present research, an acceleration phenomenon is observed in a coupled system of an electronic circuit model. Also, by using an electronic circuit simulator, the conditions causing acceleration in a coupled system are studied. The power consumption of a coupled system is numerically derived. It is found that the power consumption can decrease when the acceleration phenomenon takes place. Heart muscle cells not only accelerate the oscillation (or increase the number of oscillations) by mutual coupling but also reduce the power (or energy) consumption at the same time. It is suggested that efficient information transmission may be carried out with less energy overall. (C) 2004 Wiley Periodicals, Inc.

    DOI: 10.1002/ecjc.20081

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  • Low-powered and accelerative Synchronization in the coupled system of nonlinear hardware oscillators Reviewed

    Y. Maeda, S. Sakaguchi, H. Makino, S. Doi

    The IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences   J86-A ( 12 )   1478 - 1486   2003.12

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  • Acceleration phenomena of hardware coupled oscillators for cardiac Purkinje fiber cells Reviewed

    Y. Maeda, S. Doi, H. Makino

    5th International Workshop on Neuronal Coding   60 - 63   2003.9

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  • Using infrared-transparent pigments to identify objects Reviewed

    Shirou Yamamiya, Hideo Makino, Mikihiko Hirono, Yoshinobu Maeda, Ikuo Ishii

    Systems and Computers in Japan   33 ( 10 )   74 - 82   2002.9

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    A discussion on creation of several pigments for color printing, that share the characterstic of being transparent to near-infrared light, was presented. A method for object identification, in which concealed information was screen-printed onto clothing was also proposed and investigated. The results showed that it was possible to detect and identify a hidden encoded object.

    DOI: 10.1002/scj.1159

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  • Evaluation of a GPS-based guidance system for visually impaired pedestrians Reviewed

    Y. Maeda, E. Tano, H. Makino, T. Konishi, I.Ishii

    CSUN 17th Annual International Conference, "Technology and Persons with Disabilities"   2002.3

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  • Measuring method for an outdoor guidance system using GPS for the visually impaired Reviewed

    E. Tano, H. Makino, Y. Maeda, I. Ishii

    Japan Institute of Navigation   105   149 - 156   2001.9

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  • Evaluation of information layers in a GPS-based guidance system for the visually impaired Reviewed

    E. Tano, Y. Maeda, H. Makino, T. Konishi, I. Ishii

    Theory and Applications of GIS   9 ( 2 )   41 - 51   2001.9

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    DOI: 10.5638/thagis.9.2_41

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  • Bifurcation structure of electronic circuit model for neuronal firings Reviewed

    Y. Maeda, S. Sato, H. Makino

    Trans. IEE of Japan   121-C ( 7 )   1153 - 1159   2001.7

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  • An object identification method using infrared-transparent pigment Reviewed

    S. Yamamiya, H. Makino, M. Hirono, Y. Maeda, I. Ishii

    The IEICE Transactions on Information and Systems   J83-D-I ( 7 )   797 - 803   2000.7

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  • A pulse-type hardware neuron model with beating, bursting excitation and plateau potential Reviewed

    Yoshinobu Maeda, Hideo Makino

    BioSystems   58 ( 1-3 )   93 - 100   2000

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    We proposed a pulse-type hardware neuron model. It could reproduce simple excitations, beating and bursting discharges as well as an action potential with a plateau potential observed in living membranes. The model exhibited one of these dynamics depending on parameter values of the model's circuit. They include resistance, capacitance and externally injected DC current intensity. We studied the model's dynamics based on hardware experiments and mathematical analyses. Our results showed that two inward currents introduced into the model and differences in their operating time scales determined dynamics of the model. In particular, we illustrated a mechanism of the bursting discharges generation in terms of bifurcation theory and time-dependent changes in the form of instantaneous current-voltage characteristics of the model. Copyright © 2000 Elsevier Science Ireland Ltd.

    DOI: 10.1016/S0303-2647(00)00111-8

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  • A burst-generating neuronal model using a two-terminal electronic circuit Reviewed

    Y. Maeda, S. Sato, H. Makino

    3rd International Workshop on Neuronal Coding   173 - 176   1999.10

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  • Reduction of a model for an Onchidium pacemaker neuron Reviewed

    Y Maeda, K Pakdaman, T Nomura, S Doi, S Sato

    BIOLOGICAL CYBERNETICS   78 ( 4 )   265 - 276   1998.4

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    The eight-variable model for the giant neuron localized in the esophageal ganglia of the marine pulmonate mollusk Onchidium verruculatum is reduced to four-and-three-dimensional systems by regrouping variables with similar time scales. These reduced models replicate the complex behavior including beating, periodic bursting and aperiodic bursting displayed by the original full model when the parameter I(ext) representing the intensity of the constant DC current stimulation is varied across a wide range. The complex behavior of the full model arises from the interaction of fast and slow dynamics, and depends on the time scale C(s) of the slow dynamics. The four-variable reduced model is constructed independently from the parameter C(s) so that it reproduces the two-dimensional bifurcation structure of the full model for the two parameters I(ext) and C(s). The three-variable reduced model is derived for a specific value of C(s). The parameters of this model are tuned so that its one-parameter bifurcation diagram for I(ext) closely matches that of the full model. Correspondence between bifurcation structures ensures that both reduced models reproduce the various discharge patterns of the full model. Similarity between the full and reduced models is also confirmed by comparing mean firing frequencies and membrane potential waveforms in various regimes. The reduction exposes the factors essential for reproducing the dynamics of the full model; indeed, it shows that the eight variables representing the membrane potential and seven gating variables of six ionic currents in the full model account, in fact, for three basic processes responsible for excitability, post-discharge refractoriness and slow membrane modulation.

    DOI: 10.1007/s004220050432

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  • Double impulse solutions in reduced Hodgkin-Huxley models Reviewed

    Hidekazu Fukai, Yoshinobu Maeda, Khashayar Pakdaman, Taishin Nomura, Shunsuke Sato

    Proc. of The Fifth International Conference on Neural Information Processing   1263 - 1266   1998

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  • A mathematical aspect of neural coding Reviewed

    S Sato, T Nomura, K Pakdaman, Y Maeda, T Yamanobe, H Fukai

    ADVANCED TOPICS IN BIOMATHEMATICS   229 - 238   1998

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    In this paper, we show bifurcation diagrams of various models of single neuron to direct current stimuli and to periodic pulse trains. We introduce a simple mathematical model of a. living pacemaker neuron and show that the phase transition curve is a useful tool to investigate the neuron's response to periodic pulse trains. We also mention a model for bursting oscillation and reduction of its dynamics.

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  • Reduction of the Onchidium Pacemaker Neuron Model Reviewed

    Maeda Yoshinobu, Doi Shinji, Nomura Taishin, Sato Shunsuke

    The Brain & Neural Networks   1 ( 1 )   12 - 19   1994

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    <I>Onchidium</I> pacemaker (OP) neurons show oscillatory behaviors such as beatings and periodic or chaotic discharges. Hayashi et al. proposed a set of modified Hodgkin-Huxley equations as a model of the OP neurons and succeeded to reproduce the discharge patterns. The model consists of 8 variables including those of fast and slow potasium and sodium currents. It is difficult, however, to gain mathematical insight of the model because of high dimensionality. Recently, Kepler et al. proposed a systematic method to reduce a number of variables in H-H equations without loss of essential features of the dynamics. In the present work, we apply the method by Kepler et al. to reduce the model of OP neurons by Hayashi et al. and show that the reduced one mimics well the oscallatory behaviors of the OP neurons.

    DOI: 10.3902/jnns.1.12

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Books

  • 次世代ヒューマンインタフェース開発最前線

    前田 義信, 新川 拓也( Role: Joint author)

    株式会社エヌ・ティー・エス  2013.6 

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  • Assistive Technology Research Series, Selected papers from Japanese conference on the advancement of assistive and rehabilitation technology

    Yoshinobu Maeda, Takashi Konishi( Role: Joint author ,  Assist systems for traveling and planning for the visually impaired (pp.132-138))

    IOS Press  2011.7  ( ISBN:9781607507574

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  • 情報福祉の基礎知識-障害者・高齢者が使いやすいインタフェース-

    情報福祉の基礎研究会( Role: Joint author ,  視覚障害(ロービジョン)の読書時メンタルワークロード調査)

    ジアース教育新社  2008.3 

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MISC

  • 視覚探索時の注視点の動きを制御するネットワークモデル

    王禹萱, 橋本帆波, 小澤誠, 野村泰伸, 塚田章, 前田義信

    日本生体医工学会大会プログラム・抄録集(Web)   61st   2022

  • An analysis of factors affecting the search time in visual search

    橋本帆波, 松井瑞季, 小澤誠, 野村泰伸, 塚田章, 前田義信

    日本生体医工学会大会プログラム・抄録集(Web)   60th   2021

  • A Consideration on Efficient Visual Search from the Perspective of Complex Networks

    前田義信, 小澤誠, 野村泰伸, 塚田章

    電子情報通信学会技術研究報告(Web)   120 ( 301(MBE2020 19-25) )   2020

  • スマホゲーム中の視線解析 : 画面の大きさによる比較

    石井 雅子, 谷 賢太郎, 前田 義信

    新潟医療福祉学会誌   19 ( 1 )   65 - 65   2019.10

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  • 3Dプリンタを使用した視覚障がい者向けの挟み将棋用の用具の開発

    谷 賢太朗, 田村 剛一, 前田 義信

    新潟医療福祉学会誌   19 ( 1 )   109 - 109   2019.10

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  • Analysis of Web advertisement based on user preference behavior

    63   197 - 200   2019.5

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  • Classification of Gaze Steps during Visual Search into Fixations and Saccades

    松井瑞季, 津野将行, 小澤誠, 野村泰伸, 塚田章, 前田義信

    電子情報通信学会技術研究報告   119 ( 44(MBE2019 1-15)(Web) )   33‐38 (WEB ONLY)   2019.5

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  • Classification of fixation and saccade in visual search

    松井瑞季, 津野将行, 小寺龍之介, 小澤誠, 野村泰伸, 塚田章, 前田義信

    電子情報通信学会技術研究報告   118 ( 416(CAS2018 116-137) )   45‐48   2019.1

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  • 視覚探索時の注視点軌跡の移動長と移動角度について

    前田義信, 野村泰伸, 塚田章

    日本生体医工学会大会プログラム・抄録集(Web)   58th   ROMBUNNO.PO‐B‐002 (WEB ONLY)   2019

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  • A Modeling on Eye Movements in Visual Search

    前田 義信, 小寺 龍之介, 津野 将行, 小澤 誠, 野村 泰伸, 塚田 章

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   118 ( 242 )   19 - 24   2018.10

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  • Consideration on Frequency Distribution of Eye Movement in Visual Search

    小寺龍之介, 小澤誠, 野村泰伸, 塚田章, 前田義信

    電子情報通信学会技術研究報告   118 ( 44(MBE2018 1-6)(Web) )   23‐26 (WEB ONLY)   2018.5

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  • Gaze-step Simulation on Visual Search of Target Letter

    津野将行, 小寺龍之介, 棚橋重仁, 飯島淳彦, 塚田章, 前田義信

    電子情報通信学会技術研究報告   118 ( 44(MBE2018 1-6)(Web) )   19‐22 (WEB ONLY)   2018.5

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  • Development of Web application that supports Cardio Pulmonary Resuscitation for visual impairments

    117 ( 337 )   105 - 108   2017.12

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  • Poster Presentation : The Development of Farmwork Management System using Smartglasses

    村上 尊哉, 前田 義信, 山﨑 達也

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   117 ( 310 )   55 - 58   2017.11

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  • Multi agent simulation on change of customer flow line by arrangement of store clerks in home center

    116 ( 483 )   49 - 52   2017.3

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  • Relationship between School-Caste and Behavior Rule of Agent using Multi-Agent Simulation

    116 ( 483 )   53 - 57   2017.3

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  • Basic Study on the "School Caste" Phenomena Using Multi-Agent Simulation

    小野 凌輔, 西田 悠, 前田 義信, 松本 慎平, 加藤 浩介, 山岸 秀一

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   116 ( 421 )   99 - 103   2017.1

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  • Group-Theoretic Consideration of Quadrupedal Locomotion Rhythms Generated by Hardware CPG Models

    116 ( 422 )   121 - 126   2017.1

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  • Influence of incomplete information exchanges on the emergence of money using Yasutomi model

    116 ( 422 )   95 - 98   2017.1

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  • Consideration on Game Property of Rotation-Shogi Game Using Speech Interface

    116 ( 421 )   105 - 108   2017.1

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  • Development of Web application that supports Cardio Pulmonary Resuscitation for visual impairments

    19   105 - 108   2017

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  • D-8-3 Evaluation of evacuation model using quality engineering

    OBA Shiori, ITO Nao, MATOBA Ryuichi, HASHIMOTO Yuka, GOMI Nobuyuki, TANI Kentaro, MAEDA Yoshinobu

    Proceedings of the IEICE General Conference   2016 ( 1 )   98 - 98   2016.3

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  • D-8-2 Power interchange modeling by different demand agents

    Tani Kentaro, Maeda Yoshinobu, Nakano Keisuke, Numata Hideho, Sengoku Masakazu

    Proceedings of the IEICE General Conference   2016 ( 1 )   97 - 97   2016.3

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  • A-1-21 Relationship between Gait Pattern and Power Supply Reproduced by Hardware Network Model of Neuronal Excitation

    Maeda Yoshinobu, Sasagawa Naruki, Maruyama Akihiro

    Proceedings of the IEICE Engineering Sciences Society/NOLTA Society Conference   2016   21 - 21   2016.3

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  • Power interchange modeling using multi-agent system

    115 ( 422 )   57 - 60   2016.1

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  • Basic Study for the Effect of Product Lifespan on Markets using Multi-agent simulation

    115 ( 422 )   95 - 99   2016.1

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  • Reproduction of Quadrupedal Gait Patterns Using a Coupled Hardware Nonlinear Oscillators

    小宅智史, 丸山陽央, 野村泰伸, 前田義信

    電子情報通信学会技術研究報告   115 ( 422(CAS2015 61-79) )   79 - 83   2016.1

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  • Study on the scapegoat phenomenon using an artificial school class simulation

    115 ( 315 )   103 - 108   2015.11

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  • 品質工学的手法を用いたマルチエージェント避難シミュレーションモデルのパラメータ設計

    大場汐莉, 伊藤尚, 的場隆一, 橋本優花, 五味伸之, 谷賢太朗, 前田義信

    生活生命支援医療福祉工学系学会連合大会講演論文集(CD-ROM)   2015   ROMBUNNO.2C1-01 - 56   2015.9

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  • Influence of mutual concession of evacuees at the occurrence of a disaster : Simulation and theoretical approach

    45 ( 4 )   299 - 304   2015.6

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  • Influence of mutual concession of evacuees at the occurrence of a disaster : Simulation and theoretical approach

    115 ( 98 )   95 - 100   2015.6

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  • Influence of mutual concession of evacuees at the occurrence of a disaster : Simulation and theoretical approach

    115 ( 100 )   95 - 100   2015.6

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  • Influence of mutual concession of evacuees at the occurrence of a disaster : Simulation and theoretical approach

    115 ( 99 )   95 - 100   2015.6

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  • Study on the optimal number of buttons of touch panel button interfaces : Transition of the optimal number of buttons by increasing the input letters

    KITA Takuro, ITO Nao, TANI Kentaro, MAEDA Yoshinobu

    IEICE technical report. Welfare Information technology   114 ( 447 )   11 - 15   2015.2

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    In previous study, we examined to let the participants input alphabet of four characters and recorded performance time, tap interval and the number of taps, and we suggested that the optimal number of buttons (that performance time is minimum) is 10. In addition, the optimal number of buttons which was given from performance time accorded with that one which was estimated multiple regression from tap interval and the number of taps. The purpose of this study is to investigate the influence of increasing the necessary number of letters to input on the optimal number of buttons. As a result, it is suggested that the optimal number of buttons increases with increasing the input letters.

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  • Development of the Interface on Operating Unmanned Aerial Vehicle by Face Recognition using Kinect

    ONODERA Shun, TANI Kentaro, MAEDA Yoshinobu, NAKANO Keisuke, YAMAZAKI Tatsuya

    IEICE technical report. Circuits and systems   114 ( 425 )   7 - 10   2015.1

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    In recent years, remote control operation robots have been studied, and, as such, must be expected that an Unmanned Aerial Vehicle (UAV) should be used in various situations. We proposed an interface system to operate the UAV using movement of the human body. This study aims to construct the interface system that is capable of reducing the physical workload or increasing the work efficiency. In this technical report, we implemented the system sending the command to the UAV. The system generated the command when it obtained the data on human movement from Kinect. Especially, we focused on two operations to the UAV, by the right hand, and by the face recognition using Kinect. The latter case has not yet be implemented in the system, and it will be one of the future works.

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  • Development of Web-based "kikimimi" game system

    HASHIMOTO Shiryu, TANI Kentaro, KAWACHI Ryosuke, NIIKAWA Takuya, MAEDA Yoshinobu

    IEICE technical report. Circuits and systems   114 ( 425 )   1 - 6   2015.1

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    Visually impaired persons can use an equipment and service based on a concept of the barrier free in various living situations in modern society, because the ADL (Activities of Daily Living) ability of the visually impaired is enhanced by assistive technologies. However, the support of cultural activities, or QOL (Quality Of Life), for the visually impaired, such as entertainments and games, are under utilized. Visually impaired persons may have a lot of mental stress by depending on the sighted persons in the daily living. To solve this problem, not only ADL but QOL is important issue on the assistive technology development. We have developed the game to enhance the QOL of the visually impaired from the viewpoint of entertainment.

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  • Reproduction of the frequency-dependent behavior in artificial school class model

    YAMAZAKI Yuta, YAMAMOTO Kouki, TATSUTA Atsuya, TANI Kentaro, KATO Kosuke, MAEDA Yoshinobu

    IEICE technical report. Circuits and systems   114 ( 425 )   11 - 16   2015.1

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    The bullying problem (peer aggression or victimization) evolves from a situation in which anonymous bullies attack a particular victim with its negative attributes. There has been tried to solve the bullying problem from educational, medical, sociological and many other viewpoints. We also have investigated a mechanism of the bullying, using an artificial school-class model (ASC model) based on multi-agent simulation. In this technical report, we attempted to reproduce the concept of "frequency-dependent behavior" in the ASC model. The frequency-dependent behavior means that the agent which was often received the particular behavior from others in the past step becomes easy to receive the same behavior in the present step. If the behavior received repeatedly is negative, or non-friendly, then the agent will be easily a victim defined in the ASC model.

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  • Behavior of a monetary exchange model with the mere-exposure effect

    INOMATA Ryota, ITO Nao, TANI Kentaro, MAEDA Yoshinobu

    IEICE technical report. Circuits and systems   114 ( 425 )   21 - 26   2015.1

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    To investigate the mechanism which the monetary exchange emerges from the barter exchange provides the insight about not only the history of a money economy but the appearance of local and electronic moneys. Field investigation at the local community is so difficult that we have investigated it virtually by using a method on the multi-agent simulation. So far, we have reproduced the simultaneous circulation phenomenon by a couple of moneys on the social-network-introduced Yasutomi model. However, the consumption behavior was hardly observed in it. In this technical report, we studied the simultaneous circulation phenomenon by a couple of moneys with having the consumption behavior, by means of introducing the mere-exposure effect to Yasutomi model.

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  • Reproduction of Four-Leg Animal Gaits Using a Coupled System of Simple Hardware CPG Models

    KOJIMA Hayate, MAEDA Yoshinobu, NOMURA Taishin

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences   98 ( 2 )   508 - 509   2015

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    We proposed a hard-wired CPG hardware network to reproduce the gaits of four-legged animals. It should reproduce walking and bounding, and they should be switchable with each other by changing the value of only one voltage.

    DOI: 10.1587/transfun.E98.A.508

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  • Consideration and numerical simulation for the school caste issue

    TATSUTA Atsuya, TANI Kentaro, KATO Kosuke, MAEDA Yoshinobu

    IEICE technical report. Welfare Information technology   114 ( 357 )   91 - 96   2014.12

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    In the past decade, a rank system of student's groups qualitatively distinguished from others has been observed in Japanese school classes. It is called "school-caste", which is one of the cause of the school bullying as social problems. The school-caste can be observed inwardly from the students, but the outward observers such as teachers and parents can hardly find the school-caste in the students. In this technical report, we reproduced the school-caste-like phenomena on the artificial school class model using the multi-agent system, and investigated the effect of the teacher to prevent the school-caste from developing the school bullying. As a result, we suggested that the "prevention" should be useful for giving a stressless manner to the psychological personal relation of students, even under the school-caste.

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  • A software development for the storytelling assist system on picture books by the visually impaired

    MATSUBA Hiroshi, SATO Masahiko, TANI Kentaro, MAEDA Yoshinobu

    IEICE technical report. Welfare Information technology   114 ( 357 )   11 - 16   2014.12

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    A picture book is one of the most important communication methods of parents with their children. Reading picture books to children is valuable to them in developing their emotional maturity. However, it is difficult for the parents with visual impairement, unlike the sighted, to read picture books to their children. Such support systems are under spread. In this technical report, we developed an assistive technology regardless of using OS to be possible that the parents with visual impairement read a picture book to their children, furthermore, made a function to add new picture books on our application. In the experiment, eight sighted participants operated the developed system and the usability was evaluated.

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  • Switching four-legged animal gaits between walk, trot and bound using CPG circuit

    KOJIMA Hayate, MARUYAMA Akihiro, ICHIMURA Tomoyasu, MAEDA Yoshinobu

    IEICE technical report. Circuits and systems   114 ( 312 )   1 - 6   2014.11

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    In the mammalian spinal cord, a central pattern generator (CPG) is supposed to be as neural networks. The CPG is responsible for producing locomotor rhythms periodically, and the rhythms are propagated down to flexor and extensor legs. So far, we have constructed a hardware CPG model from the mathematical description proposed by Rybak et al., and, using it, reproduced oscillation behaviors corresponding to some quadrupedal gaits of four-legged animals. However, when reproducing their gaits, we need to change the structure of the network among the hardware CPG models. In this technical report, we reproduced the oscillation behaviors corresponding to the typical gaits, "walking", "trotting", and "bounding" with the hardware CPG model proposed, and switched them using the only one parameter, voltage V_<MLR>. As a result, we constructed two hardware networks that can switch between the walking and trotting, and between the trotting and bounding.

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  • Switching four-legged animal gaits between walk, trot and bound using CPG circuit

    KOJIMA Hayate, MARUYAMA Akihiro, ICHIMURA Tomoyasu, MAEDA Yoshinobu

    Mathematical Systems Science and its Applications : IEICE technical report   114 ( 313 )   1 - 6   2014.11

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    In the mammalian spinal cord, a central pattern generator (CPG) is supposed to be as neural networks. The CPG is responsible for producing locomotor rhythms periodically, and the rhythms are propagated down to flexor and extensor legs. So far, we have constructed a hardware CPG model from the mathematical description proposed by Rybak et al., and, using it, reproduced oscillation behaviors corresponding to some quadrupedal gaits of four-legged animals. However, when reproducing their gaits, we need to change the structure of the network among the hardware CPG models. In this technical report, we reproduced the oscillation behaviors corresponding to the typical gaits, "walking", "trotting", and "bounding" with the hardware CPG model proposed, and switched them using the only one parameter, voltage V_<MLR>. As a result, we constructed two hardware networks that can switch between the walking and trotting, and between the trotting and bounding.

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  • Investigation on human action selection for passing by each other in a narrow alley

    YOKOKAWA Kyohei, TANI Kentaro, KONISHI Takashi, MAEDA Yoshinobu

    IEICE technical report. Circuits and systems   114 ( 312 )   7 - 10   2014.11

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    It is difficult for evacuees to behave the smooth evacuation, especially in the case that they are panicked in occurring some disaster. Such a man-made disaster will increase the damage. Therefore, the evacuees have to give good influence to the global evacuation behavior by means that they evacuate calmly without preceding personal benefit. A lot of computer simulations, especially the multi-agent simulation, or MAS, have tried to clarify the valuable knowledge for the smooth evacuation. We also have made the MAS model on the evacuation behavior, and especially, have investigated the influence of the mutual concession of the agents on the global evacuation time. In this technical report, we investigated the effect of the mutual concession at the time of the collision through the virtual evacuation game. The game programmed in this study made the player select "go ahead of the agent," or "stop and concede to the agent" when the player serially and virtually collided with ten agents.

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  • Investigation on human action selection for passing by each other in a narrow alley

    YOKOKAWA Kyohei, TANI Kentaro, KONISHI Takashi, MAEDA Yoshinobu

    Mathematical Systems Science and its Applications : IEICE technical report   114 ( 313 )   7 - 10   2014.11

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    It is difficult for evacuees to behave the smooth evacuation, especially in the case that they are panicked in occurring some disaster. Such a man-made disaster will increase the damage. Therefore, the evacuees have to give good influence to the global evacuation behavior by means that they evacuate calmly without preceding personal benefit. A lot of computer simulations, especially the multi-agent simulation, or MAS, have tried to clarify the valuable knowledge for the smooth evacuation. We also have made the MAS model on the evacuation behavior, and especially, have investigated the influence of the mutual concession of the agents on the global evacuation time. In this technical report, we investigated the effect of the mutual concession at the time of the collision through the virtual evacuation game. The game programmed in this study made the player select "go ahead of the agent," or "stop and concede to the agent" when the player serially and virtually collided with ten agents.

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  • Investigation on human action selection for passing by each other in a narrow alley

    2014 ( 2 )   1 - 4   2014.11

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  • 動的シュブルール錯視を再現するアナログ回路型神経ネットワークの設計

    斎藤元喜, 前田義信, 秋田純一, 塚田 章

    生体医工学シンポジウム2014   2014.9

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  • After the symposium "What kind of textbooks of circuits are more popular?"

    Kaneko Yoshihiro, Maeda Yoshinobu

    Mathematical Systems Science and its Applications : IEICE technical report   114 ( 125 )   159 - 161   2014.7

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  • Quantitative Analysis on Usability of Button-Input Interfaces using tablet device

    ITO Nao, TANI Kentaro, MAEDA Yoshinobu

    IEICE technical report. Speech   114 ( 91 )   5 - 9   2014.6

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    In this study, in order to evaluate the usability of touch panel button interfaces, we examined to let the participants input alphabet of four characters and recorded performance time, tap interval and the number of taps. The optimal number of buttons which is given from performance time accorded with that one which is estimated multiple regression from tap interval and the number of taps. Based on this, we can estimate the optimal number of buttons from tap interval and the number of taps. The optimal number of buttons increases to ten from eight in comparison with precedent study which used mouse button interfaces. This is because tap interval become smaller significantly than the precedent study. Therefore, it is suggested that cognitive workload on touch panel interfaces should be smaller than mouse one.

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  • Quantitative Analysis on Usability of Button-Input Interfaces using tablet device

    44 ( 5 )   249 - 253   2014.6

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  • Quantitative Analysis on Usability of Button-Input Interfaces using tablet device

    ITO Nao, TANI Kentaro, MAEDA Yoshinobu

    IEICE technical report. Welfare Information technology   114 ( 92 )   5 - 9   2014.6

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    In this study, in order to evaluate the usability of touch panel button interfaces, we examined to let the participants input alphabet of four characters and recorded performance time, tap interval and the number of taps. The optimal number of buttons which is given from performance time accorded with that one which is estimated multiple regression from tap interval and the number of taps. Based on this, we can estimate the optimal number of buttons from tap interval and the number of taps. The optimal number of buttons increases to ten from eight in comparison with precedent study which used mouse button interfaces. This is because tap interval become smaller significantly than the precedent study. Therefore, it is suggested that cognitive workload on touch panel interfaces should be smaller than mouse one.

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  • 回路モデルを用いた四肢歩行パターンに関する研究

    前田義信, 丸山陽央, 小島颯, 市村智康, 野村泰伸

    電子情報通信学会大会講演論文集(CD-ROM)   2014   ROMBUNNO.AS-1-3   2014.3

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  • AI-1-1 What kind of textbooks of circuits are more popular?

    Kaneko Yoshihiro, Maeda Yoshinobu

    Proceedings of the IEICE General Conference   2014   "SS - 47"-"SS-48"   2014.3

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  • Efficiency of DTN Routing using monetary exchange

    ASAMA Masahito, MIYAKITA Kazuyuki, MAEDA Yoshinobu, NAKANO Keisuke

    IEICE technical report. Circuits and systems   113 ( 427 )   35 - 40   2014.2

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    Delay Tolerant Networks (DTNs) are networks that enable us to exchange information by tolerating a long delay time. DTNs can be applied to various purposes such as disaster communication, regional information dissemination and so on. In this report, we propose a method for spreading of information periodically generated by source nodes in a DTN. As a related work, a model of barter exchange generating the currency, which is called Yasutomi&#039;s model, is proposed. In this report, we try to apply this model to the above method for the information spreading. We propose an information-exchange method that utilizes the view vector, which is introduced in Yasutomi&#039;s model, and show that the proposed method can efficiently spread information in the network.

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  • Mobile Rotation-Shogi Game using Speech Interface

    JIN Li, TANI Kentaro, MAEDA Yoshinobu

    IEICE technical report. Circuits and systems   113 ( 427 )   25 - 28   2014.2

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    A wide range of assistive technologies to support the visually impaired persons have been developed to enhance the activities of daily living (ADL). However, enhancing not only the ADL but also the quality of life (QOL), such as an entertainment game, is needed to relieve some of their stress. Such games should be developed from the following two viewpoints; One is that the visually impaired persons are on equality with the sighted persons at the game whether they win or not. The other is that the game must be played without visual information by the players, and, as such, must be played using only auditory information as one of the alternative perceptions of the visual cue. In this report, we developed Japanese backgammon type game played by four player, so-called, Japanese rotation shogi, using the speech-output interface for the visually impaired, was evaluated by the Csikszentmihalyi's flow.

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  • Monetary Exchange Agent Simulation Using Intermediators

    INOMATA Ryota, ITO Nao, TANI Kentaro, MAEDA Yoshinobu

    IEICE technical report. Circuits and systems   113 ( 427 )   29 - 33   2014.2

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    To investigate the mechanism which the monetary exchange emerges from the barter exchange provides the insight about not only the history of a money economy but the appearance of local and electronic moneys. Field investigation at the local community is so difficult that, we have investigated it using a method of the multi-agent simulation. So far, we have studied the influence of social network structure on the emergence and circulation of money, only for one community. In this technical report, we studied the money circulation between two communities by means of using intermediators. As a result, we verified that the intermediators played an important role in the increase of the sum of agent's consumption.

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  • Reproduction of Four-leg Animal Gaits Using an Asymmetric Hardware Central Pattern Generator Model

    ISHIGOKA Genichiro, MARUYAMA Akihiro, KOJIMA Hayate, ICHIMURA Tomoyasu, MAEDA Yoshinobu

    IEICE technical report. Circuits and systems   113 ( 427 )   41 - 44   2014.2

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    In this technical report, we proposed a hardware model of the central pattern generator, or CPG, which controlled the gait such as "walk" and "run" presented by four-leg animals. Four-leg animals show four "run" phenomena, known as trot, pace, canter, and bound (or gallop), except for "walk" that is a gait slower than "run." We presented a hard-wired CPG network switchable between "run" and "walk" using only one parameter.

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  • Study on change of the gaits using the electronic circuit CPG network

    MARUYAMA AKIHIRO, KOJIMA HAYATE, ICHIMURA TOMOYASU, NOMURA TAISHIN, MAEDA YOSHINOBU

    日本生体医工学会大会プログラム・論文集(CD-ROM)   53rd   ROMBUNNO.O3-01-7   2014.1

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    © 2014, Japan Soc. of Med. Electronics and Biol. Engineering. All rights reserved. In the nervous system, an exquisite controller, so-called, the central pattern generator (CPG), exists indirectly in rhythm phenomena of organism. Many mathematical network models have been proposed to account for the phenomena, and yet, the physiological detail has not been clear. The basic form of this model is a combination of reciprocal inhibition of nervous systems that control extensor and flexor, respectively, and, as such, must be observed mutually firing bursting discharges in both sites. Rybak et al. proposed a Hodgkin-Huxley type mathematical CPG model composed of two levels. In this study, we reproduced quadrupedal locomotion (walking patterns, or animal gaits) by means of coupling four hardware CPG models, based on Rybak&#039;s mathematical model. So far, such the networked CPG models were needed to be controlled simultaneously by plural parameters to generate abundant gaits, or the network structure had to be changed topologically every gait. We propose in our hardware hard-wired CPG network model that two typical gaits, walk and bound, can be switchable by changing just one parameter corresponding to a constant voltage stimulation from the midbrain locomotor region .

    DOI: 10.11239/jsmbe.52.O-269

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  • Study on change of the gaits using of the electronic circuit CPG network

    Maruyama Akihiro, Kojima Hayate, Ichimura Tomoyasu, Nomura Taishin, Maeda Yoshinobu

    Transactions of Japanese Society for Medical and Biological Engineering   52 ( 0 )   O - 269-O-270   2014

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    Exquisite controller of nervous system, so-called, a central pattern generator (CPG), exists in rhythm phenomena of organism. Mathematical network models were proposed to account for the phenomena, however, the physiological details has not been clear. The basic form of this model is a combination of reciprocal inhibition of nervous systems that control extensor and flexor, respectively, and, as such, must be observed mutual bursting discharge. Rybak et al. proposed a Hodgkin-Huxley type mathematical CPG model composed of two levels.We constructed, in this study, reproduced quadruped walking patterns (gaits) by means of coupling four hardware CPG models, based on Rybak's mathematical model. So far, such the networked CPG model was simultaneously controlled by plural parameters to generate abundant gaits, or network structure itself was changed every gait. In this study, we proposed a hard-wired CPG network that has been possible to generate two gaits, by changing just one parameter.

    DOI: 10.11239/jsmbe.52.O-269

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  • Niigata Report

    MURAMATSU Shogo, MAEDA Yoshinobu, NAKANO Keisuke

    Fundamentals Review   7 ( 3 )   290 - 291   2014

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  • Gaze point measurement in a button-input interface

    ISHIHARA Hiroya, TANI Kentaro, TOMIOKA Kenta, IIJIMA Atsuhiko, MAEDA Yoshinobu

    IEICE technical report. Welfare Information technology   113 ( 347 )   11 - 16   2013.12

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    On the button-input interfaces used in information devices, such as controllers, automatic teller machines (ATM) and ticket machines, we have conducted the experiment using virtual button interface to evaluate the physical workload, or usability. In our experiment, it was formulated a U-shaped curve against increasing the number of buttons, and, as such, must have a unique optimal number of buttons in the sense of reducing the physical workload. Furthermore, we globally analyzed that it was evaluated by two sorts of sub-workload, search and operational workloads on the button input. In this report, we investigated statistical distributions obtained by local behaviors on the button input. To this end, we measured gaze points during the button-input operation. We showed that the motion of gaze points was able to be modeled by the Levy flight.

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  • On-line systematization of a speech-output entertainment game "kikimimi"

    ISHIZAKA Eitaro, TANI Kentaro, MAEDA Yoshinobu, NIIKAWA Takuya

    IEICE technical report. Welfare Information technology   113 ( 347 )   17 - 20   2013.12

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    One method to enhance not only ADL (Activities of Daily Living) but also QOL (Quality Of Life) is to enhance the empowerment of the visually impaired. The visually impaired often become the relatively powerless because they are usually dependent on the sighted (or "guide helper") in going out of home to inexperienced places. In order to enhance the empowerment of the visually impaired, it is necessary that the visually impaired have opportunities to increase their self-efficacy by means of not depending on the sighted for their activities. We have presented speech-output entertainment games to make a fight possible from an equal footing with the sighted, and, as such, must hope that the visually impaired increase their self-efficacy through the game play. In this technical report, we redesigned the table game "kikimimi," on the internet to have an opportunity that the visually impaired or the sighted living geographically far from the others can play the game "kikimimi".

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  • Modeling of player's behavior using artificial school class game

    TATSUTA Atsuya, TANI Kentaro, KATO Kosuke, MAEDA Yoshinobu

    Mathematical Systems Science and its Applications : IEICE technical report   113 ( 279 )   73 - 78   2013.11

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    For the last several decades, the bullying problem (peer aggression or victimization) has transformed, from a situation in which a particular bully attacks a particular victim with negative attributes into one in which a bully may become a victim depending on circumstances. There has been tried to solve the bullying problem from educational, medical, and so on. We have investigated a mechanism generating the bullying, using an artificial school class model (ACM) based on multi-agent simulation (MAS). Every agent is programmed so as to make friends with those who have similar interests, hobbies and tastes. The player can think of the school bullying to manipulate the pseudo-experience game. In this technical report, first, a gaming simulation of the ACM, or a serious game, was used to investigate friendship formation, by means of changing one agent to a human player who is the participant in the ACM to virtually interact with other agents. Next, we programmed agent's behavior using the data obtained from human behaviors through the game playing to imitate human behaviors.

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  • Modeling of player's behavior using artificial school class game

    TATSUTA Atsuya, TANI Kentaro, KATO Kosuke, MAEDA Yoshinobu

    IEICE technical report. Circuits and systems   113 ( 278 )   73 - 78   2013.11

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    For the last several decades, the bullying problem (peer aggression or victimization) has transformed, from a situation in which a particular bully attacks a particular victim with negative attributes into one in which a bully may become a victim depending on circumstances. There has been tried to solve the bullying problem from educational, medical, and so on. We have investigated a mechanism generating the bullying, using an artificial school class model (ACM) based on multi-agent simulation (MAS). Every agent is programmed so as to make friends with those who have similar interests, hobbies and tastes. The player can think of the school bullying to manipulate the pseudo-experience game. In this technical report, first, a gaming simulation of the ACM, or a serious game, was used to investigate friendship formation, by means of changing one agent to a human player who is the participant in the ACM to virtually interact with other agents. Next, we programmed agent's behavior using the data obtained from human behaviors through the game playing to imitate human behaviors.

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  • Evacuation Behavior Simulation considering positions of exits using Cellular Automaton

    YOKOKAWA Kyohei, TANI Kentaro, OGIHARA Sanae, KONISHI Takashi, MAEDA Yoshinobu

    Mathematical Systems Science and its Applications : IEICE technical report   113 ( 279 )   87 - 90   2013.11

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    It is difficult for all evacuees to behave the smooth evacuation, when they are panicked in occurring some disaster. Such a man-made disaster will increase the damage. Evacuees have to give good influence to the global evacuation behavior by means that they evacuate calmly without preceding personal benefit. A lot of computer simulations, especially the multi-agent simulation, or MAS, have tried to clarify the valuable knowledge for the smooth evacuation. We also have made the MAS model on the evacuation behavior, and especially, investigated the influence of the mutual concession of the agents on the global evacuation time. In this technical report, we introduced a phenomenon, "homing instinct," which is observed in the evacuation behavior into the evacuation model proposed, the case of two-exit model, and investigated the evacuation time which all agents were completely evacuated. As a result, we confirmed that the evacuation behavior with having mutual concession makes the evacuation time be shorter than all agents independently move to their exits.

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  • Modeling of player's behavior using artificial school class game

    Atsuya Tatsuta, Kentaro Tani, Kosuke Kato, Yoshinobu Maeda

    IPSJ SIG Notes   2013 ( 13 )   1 - 6   2013.10

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    For the last several decades, the bullying problem (peer aggression or victimization) has transformed, from a situation in which a particular bully attacks a particular victim with negative attributes into one in which a bully may become a victim depending on circumstances. There has been tried to solve the bullying problem from educational, medical, and so on. We have investigated a mechanism generating the bullying, using an artificial school class model (ACM) based on multi-agent simulation (MAS). Every agent is programmed so as to make friends with those who have similar interests, hobbies and tastes. The player can think of the school bullying to manipulate the pseudo-experience game. In this technical report, first, a gaming simulation of the ACM, or a serious game, was used to investigate friendship formation, by means of changing one agent to a human player who is the participant in the ACM to virtually interact with other agents. Next, we programmed agent's behavior using the data obtained from human behaviors through the game playing to imitate human behaviors.

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  • Evacuation Behavior Simulation considering positions of exits using Cellular Automaton

    Kyohei Yokokawa, Kentaro Tani, Sanae Ogihara, Takashi Konishi, Yoshinobu Maeda

    IPSJ SIG Notes   2013 ( 15 )   1 - 4   2013.10

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  • Four-leg Gait Simulation Research Using CPG Network

    小島颯, 市村智康, 塚田章, 野村泰伸, 前田義信

    電子情報通信学会技術研究報告   113 ( 223(NC2013 22-45) )   17 - 22   2013.9

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  • Basic Experimental Study on SMA Actuators Driven by a Hardware CPG

    ICHIMURA Tomoyasu, EJIMA Naoki, IMAIZUMI Syunya, MAEDA Yoshinobu

    IEICE technical report. Circuits and systems   113 ( 118 )   55 - 58   2013.7

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    A central pattern generator (CPG) is a half-center rhythm generator, which is constructed from neural networks of the mammalian spinal cord. The CPG generates rhythmic locomotion. Thus, it can transmit alternating rhythmic activity of extensor and flexor sites, in the absence of external rhythmic input. This mechanism contributes to generate involuntary walking patterns of the mammalian. Rybak et al. have proposed mathematical networks of the CPG composed of Hodgkin-Huxley type differential equations. Maeda et al. have constructed a hardware CPG based on Rybak's mathematical networks. Furthermore, they have controlled a legged locomotion robot by their hardware CPG. In order to make a biologically inspired robot, we are planning to employ shape memory alloy (SMA) actuators for the robot with the hardware CPG. This paper describes basic experimental study on SMA actuators driven by the hardware CPG.

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  • Experimental Evaluation of a Speech-Output Type Entertainment Game

    MATSUBA Hiroshi, TANI Kentaro, ITO Nao, MAEDA Yoshinobu, NIIKAWA Takuya

    IEICE technical report. Speech   113 ( 76 )   7 - 12   2013.6

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    Amusement-environment of the disabled persons becomes important to improve their stress. So far, we have developed a game, The10-1(Zatouichi), which enables the players (not only the visually impaired but also the sighted) to reduce their stress by means of playing with simple body motions. The features of the game are that the system is composed of simple rules easy to participate in the game, and the progress of the game is based on using only speech. In this technical report, we investigated the players' degree of satisfaction during playing the game, The10-1, by using the flow proposed by Csikszentmihalyi.

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  • Experimental Evaluation of a Speech-Output Type Entertainment Game

    MATSUBA Hiroshi, TANI Kentaro, ITO Nao, MAEDA Yoshinobu, NIIKAWA Takuya

    IEICE technical report. Welfare Information technology   113 ( 77 )   7 - 12   2013.6

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    Amusement-environment of the disabled persons becomes important to improve their stress. So far, we have developed a game, The10-1(Zatouichi), which enables the players (not only the visually impaired but also the sighted) to reduce their stress by means of playing with simple body motions. The features of the game are that the system is composed of simple rules easy to participate in the game, and the progress of the game is based on using only speech. In this technical report, we investigated the players' degree of satisfaction during playing the game, The10-1, by using the flow proposed by Csikszentmihalyi.

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  • A consideration of efficiency of DTN using monetary exchange

    ASAMA Masahito, MASUTA Takashi, MIYAKITA Kazuyuki, MAEDA Yoshinobu, NAKANO Keisuke

    IEICE technical report. Communication systems   112 ( 486 )   137 - 142   2013.3

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    Delay Tolerant Networks (DTNs)are networks that enable us to exchange information by tolerating a long delay time. DTNs can be applied to various purposes such as disaster communication, regional information dissemination and so on. In this report, we consider to apply DTNs to regional spreading and automatic collection of electronic free papers. As a related work, a model of barter exchange generating the currency, which is called Yasutomi&#039;s model, is proposed. In this report, we try to apply this model to the above spreading and collection of electronic free papers. We propose an information-exchange method that utilizes the view vector, which is introduced in Yasutomi&#039;s model, and show that the view vector accelerate the spreading of new electronic paper and the collection of 01d electronic paper. In addition, we propose another method to make the above method more effective and evaluate this method.

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  • Evacuation Behavior Simulation with "Wait" State using Cellular Automaton

    YOKOKAWA Kyohei, TANI Kentaro, OGIHARA Sanae, KONISHI Takashi, MAEDA Yoshinobu

    IEICE technical report. Communication systems   112 ( 486 )   111 - 114   2013.3

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    It is difficult for all evacuees to behave the smooth evacuation, when they are panicked in occurring some disaster. Such a man-made disaster will increase the damage. Evacuees have to give good influence to the global evacuation behavior by means that they evacuate calmly without preceding personal benefit. A lot of computer simulations, especially the multi-agent simulation, or MAS, have tried to clarify the valuable knowledge for the smooth evacuation. We also have made the MAS model on the evacuation behavior, and especially, investigated the influence of the mutual concession of the agents on the global evacuation time. As a result, the global evacuation time was minimized when the a (= the probability of the concession)was in the range between 0.3 and 0.4. If the evacuees give their way to the others by the probability 1/3 , the evacuation time as a whole will be minimized from our study.

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  • Reproduction of emergence of local currency by monetary exchange model with social network

    ITO Nao, TANI Kentaro, MAEDA Yoshinobu

    IEICE technical report. Circuits and systems   112 ( 418 )   15 - 18   2013.1

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    Recently, local currency has been important in the economic and social viewpoints of local communities. Therefore the investigation of social foundation which local currency is easy to emerge and circulate is important. However the investigation is difficult in the real local community, so in this study we investigate it using multi-agent simulation. We have re-created the circulation of several different of moneys in our simulation model. However the scale and supply of one of those moneys is nearly identical to another one, that is, all those moneys are global money. In this study, in order to emergence the local money which the scale and supply is less than global money, we introduce social network to Yasutomi's model.

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  • Behavioral analysis of friendship formation using artificial school class game

    TATSUTA Atsuya, TANI Kentaro, MAEDA Yoshinobu, KATO Kosuke

    IEICE technical report. Circuits and systems   112 ( 418 )   153 - 158   2013.1

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    For the last several decade, the bullying problem (peer aggression or victimization) has transformed, from a situation in which a particular bully attacks a particular victim with negative attributes into one in which a bully may become a victim depending on circumstances. There has been tried to solve the bullying problem from educational, medical and sociological viewpoints. We have investigated a mechanism generating the bullying, using an artificial school class model (ACM) based on multi-agent simulation (MAS). Every agent (or student) is programmed so as to make friends with those who have similar interests, hobbies and tastes. In this technical report, a gaming simulation of the ACM, or a serious game, was used to investigate friendship formation, by means of changing one agent to a human player who is the participant in the ACM to interact virtually with other agents. We obtained the results of 11 human players' behaviors observed through the gaming simulation to evaluate the ACM from the viewpoint of, whether or not, behaviors of the agents would be close to those of actual students.

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  • Development of Entertainment Game using Speech Interface

    JIN Li, MURAYAMA Naoki, TANI Kentaro, MAEDA Yoshinobu

    IEICE technical report. Circuits and systems   112 ( 418 )   149 - 152   2013.1

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    A wide range of assistive technologies to support the visually impaired persons have been developed to enhance the activities of daily living(ADL). However, enhancing not only the ADL but also the quality of life(QOL), such as an entertainment game, is needed to relieve some of their stress. Such games should be developed from the following two viewpoints; One is that the visually impaired persons are on equality with the sighted persons at the game whether they win or not. The other is that the game must be played without visual information by the players, and, as such, must be played using only auditory information as one of the alternative perceptions of the visual cue. In this report, we developed Japanese backgammon-type entertainment game played by four players, so-called, Japanese rotation shogi, using the speeh-output interface for the visually impaired.

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  • Behavioral Analysis of Task Performance using the Button-Input Interface

    Maeda Yoshinobu, Iijima Atsuhiko

    IEICE technical report. Welfare Information technology   112 ( 336 )   25 - 28   2012.12

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    On the button-input interfaces used in information devices, such as controllers, automatic teller machines (ATM) and ticket machines, we have conducted the experiment using virtual button interface to evaluate the physical workload, or usability. In our experiment, it was formulated a U-shaped curve against increasing the number of buttons, and, as such, must have a unique optimal number of buttons in the sense of reducing the physical workload. Furthermore, we globally analyzed that it was evaluated by two sorts of sub-workload, search and operational workloads on the button input. In this report, we investigated statistical distributions obtained by local behaviors on the button input.

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  • An Electronic Circuit Design that Controls Four-leg Animal Gaits

    KOJIMA HAYATE, KUBOTA MASAHITO, DOMON TATSUSHI, SUZUKI YASUYUKI, NOMURA TAISHIN, MAEDA YOSHINOBU

    電子情報通信学会技術研究報告   112 ( 297(MBE2012 45-59) )   5 - 10   2012.11

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    This paper addresses hardware modeling of replicating several walking patterns (gaits) observed in four-leg animals. They show a lot of gaits such as walk, trot, bound, etc., depending on their travel velocity. Mathematical modeling has been useful to replicate plausible oscillatory rhythms corresponding to the biological gaits. However, you have to change simultaneously many parameters in such models to switch on some gait from another. In this report, we reproduced four typical gaits (stand, pronk, walk and bound) by designing and constructing a network model using electronic circuits. The remarkable point was that the gait was switchable by an only single parameter in the hardware model. Furthermore, we regulated the bifurcation structure of the hardware model, to adjust to the typical bifurcations observed in the mathematical models.

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  • An Analog Circuit Design Controlling Quadruped Locomotion Patterns

    MAEDA YOSHINOBU, KUBOTA MASAHITO, SUZUKI YASUYUKI, NOMURA TAISHIN

    電子情報通信学会技術研究報告   112 ( 205(NLP2012 56-75) )   7 - 12   2012.9

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  • 求心性刺激を含むCPGの電子回路設計

    久保田真仁, 前田義信, 塚田 章

    生体医工学シンポジウム2012   2012.9

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  • AS-1-4 Reproduction of emergence and efficiency of local money using multi-agent simulation

    Ito Nao, Tani Kentaro, Maeda Yoshinobu

    Proceedings of the Society Conference of IEICE   2012   "S - 7"-"S-8"   2012.8

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  • AS-1-6 Consideration of a social dilemma solution by MAS using Q-learning

    Tani Kentaro, Ito Nao, Maeda Yoshinobu, Miyakita Kazuyuki, Nakano Keisuke

    Proceedings of the Society Conference of IEICE   2012   "S - 11"-"S-12"   2012.8

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  • AS-1-8 AN ANALOG ELECTRONIC CIRCUIT NEURONAL NETWORK CONTROLING QUADRUPEDAL WALKING

    Domon Tatsushi, Kubota Masahito, Maeda Yoshinobu, Ichimura Tomoyasu, Tsukada Akira

    Proceedings of the Society Conference of IEICE   2012   "S - 15"-"S-16"   2012.8

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  • Influence of the inset-outset alignment change of prosthetic foot to a subjective estimation of the loading position in its sole

    SUDA Hironori, HAYASHI Toyohiko, MAEDA Yoshinobu, WATANABE Tetsuya, MAEDA Yu, AGARIE Yukio

    IEICE technical report. ME and bio cybernetics   112 ( 123 )   15 - 20   2012.7

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    This paper describes a new subjective assessment for the alignment of tibial prosthesis. In the alignment adjustment of the prosthesis, patient's subjective assessment of the loading position in sole is usually used in clinic. Then, we developed an assessment sheet in which patient depicts the loading position in sole during standing statically. The purpose of this study is to clarify the relationship between such assessment and the inset-outset alignment change of prosthetic foot. Experiments employing three patients with trans-tibial amputation revealed that the estimated position of the loading in an appropriate alignment was located nearly on the line segment connecting toe and heel, while the medio-lateral deviation of the alignment shifted the position laterally and medially. Biomechianical parameters showing nearly the same change of the value were merely the mediolateral component of the floor reaction force, which was determined primarily by the geometrical change of the alignment.

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  • An Evacuation Behavior Simulation Introduced by Mutual Concessions of Agents

    OGIHARA Sanae, TANI Kentaro, MAEDA Yoshinobu

    Technical report of IEICE. VLD   112 ( 114 )   77 - 80   2012.6

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    It is difficult to behave the smooth evacuation, when the mobs, or the crowds, are panicked in occurring some disaster. The scale of victims does not depend on that of the disaster. Therefore, the people have to behave calmly with each other without being panicked. Because it is difficult to investigate experimentally such the evacuation behavior from a safety aspect and a psychological view point, engineering strategy in terms of computer simulation may be available for clarifying solutions of the evacuation. In this technical report, we considered the evacuation behaviors using multi-agent simulation, especially in the case that the agents behave with mutual concessions. The influence of the mutual concession s among agents on the evacuation of all agents was evaluated.

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  • An Evacuation Behavior Simulation Introduced by Mutual Concessions of Agents

    OGIHARA Sanae, TANI Kentaro, MAEDA Yoshinobu

    Mathematical Systems Science and its Applications : IEICE technical report   112 ( 116 )   77 - 80   2012.6

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    It is difficult to behave the smooth evacuation, when the mobs, or the crowds, are panicked in occurring some disaster. The scale of victims does not depend on that of the disaster. Therefore, the people have to behave calmly with each other without being panicked. Because it is difficult to investigate experimentally such the evacuation behavior from a safety aspect and a psychological view point, engineering strategy in terms of computer simulation may be available for clarifying solutions of the evacuation. In this technical report, we considered the evacuation behaviors using multi-agent simulation, especially in the case that the agents behave with mutual concessions. The influence of the mutual concession s among agents on the evacuation of all agents was evaluated.

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  • An Evacuation Behavior Simulation Introduced by Mutual Concessions of Agents

    OGIHARA Sanae, TANI Kentaro, MAEDA Yoshinobu

    IEICE technical report. Circuits and systems   112 ( 113 )   77 - 80   2012.6

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    It is difficult to behave the smooth evacuation, when the mobs, or the crowds, are panicked in occurring some disaster. The scale of victims does not depend on that of the disaster. Therefore, the people have to behave calmly with each other without being panicked. Because it is difficult to investigate experimentally such the evacuation behavior from a safety aspect and a psychological view point, engineering strategy in terms of computer simulation may be available for clarifying solutions of the evacuation. In this technical report, we considered the evacuation behaviors using multi-agent simulation, especially in the case that the agents behave with mutual concessions. The influence of the mutual concession s among agents on the evacuation of all agents was evaluated.

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  • An arthroscopic image-based 2D/3D registration for computer-assisted arthroscopic surgery

    NAKAMURA Ryosuke, HAYASHI Toyohiko, OMORI Go, WATANABE Satoshi, MAEDA Yoshinobu, WATANABE Tetsuya

    IEICE technical report. ME and bio cybernetics   112 ( 63 )   23 - 28   2012.5

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    We developed a computer-assisted system for arthroscopic surgery, which is navigated by means of overlaying a 3D bone model reconstructed from CT images upon the arthroscopic image on a real-time basis. Such overlaying requires the positional relationship between the target bone in the actual space and the bone model in the virtual space. In order to obtain this relationship, we have employed a 2D/3D registration method, where two different fluoroscopic images taken in the directions perpendicular with each other were used. However, it is not necessary to use fluoroscopy in arthroscopic surgery. In order to apply this system to surgery, the development of a new registration method was required. Then, we developed an arthroscopic image-based registration method, where at least three different arthroscopic images of the articular surfaces and corresponding 3D cartilage-model reconstructed from MRI images are used. Experiments carried out under a surgical environment using a bone model revealed that the accuracy of the overlaying would be less than 1 [mm] and less than 3 [deg] on average in translation and rotation, respectively. In the next step, rotational accuracy should be improved to meet a clinical target, less than or equal to 1 [deg] on average.

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  • An evaluation method for the stretching of the chest observed in baseball pitching

    IDA Motoki, HAYASHI Toyohiko, MAEDA Yoshinobu, WATANABE Tetsuya, TANAKA Hiroshi, NINOMIYA Hiroki, KOMAI Masahiko, NOBUHARA Katsuya

    IEICE technical report. ME and bio cybernetics   112 ( 63 )   35 - 40   2012.5

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    In baseball pitching, the pitcher's trunk is known to have an important role for conveying the movement energy from the lower limb to the upper limb. In coaching for the trunk motion achieving such role, a term "the stretching of the chest" is used frequently. Its kinematic features, however, has yet to be clarified quantitatively. To clarify "the stretching of the chest" in a scientific sense, we have developed a novel parameter S, which was defined from the positions of several skin markers mounted on the chest and the back. Our preliminary study revealed that the value of S depends primarily on the horizontal abduction of the upper extremity, which is a motion for stretching the chest. Then, in this paper, we applied it to the analysis of baseball pitching in an attempt to evaluate its efficiency in baseball coaching. Empirical results employing three skillful players and three beginners suggested that parameter S has a possibility of analyzing "the stretching of the chest" quantitatively in terms of both time-varying features and kinetic chain to the trunk and the upper extremity.

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  • AS-1-4 Multi-Agent System on Interactions between Students and its Application to Artificial School Class Game

    Maeda Yoshinobu

    Proceedings of the IEICE General Conference   2012   "S - 7"-"S-8"   2012.3

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  • Reproduction of emergence of local money using multi-agent simulation

    ITO Nao, MAEDA Yoshinobu, HAYASHI Toyohiko

    IEICE technical report. Signal processing   111 ( 486 )   195 - 200   2012.3

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    In this study, we propose a multi-agent simulation model which reproduces the phenomenon which multi currency emerge and circulate through a community. The proposed model is a model which is added two rules, reciprocal help activity and economic depression, to Yasutomi's model. As a result, we showed that new money emerges in the situation which the traditional money has already circulated through the community, and it circulates simultaneously with the traditional money. Furthermore, it was showed that the new money should emerge depending on both factors, i.e., the reciprocal help activity and economic depression. This will provide insight about the emergence and circulation of the local money.

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  • Analysis of ingestive motor function during tablet swallowing using swallowing function evaluation system SFN/3A

    KAKUSHIMA Keiko, HAYASHI Toyohiko, MAEDA Yoshinobu, WATANABE Tetsuya, MICHIMI Noboru, TANIGUCHI Hiroshige, INOUE Makoto

    18 ( 2 )   200 - 201   2012.2

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  • Detectability characteristics of voluntary movement and elimination characteristics of involuntary movement in a geomagnetic sensor-based control-interface switch, GSN/1

    HIRAMATSU Yuta, HAYASHI Toyohiko, MAEDA Yoshinobu, WATANABE Tetsuya, IIJIMA Atsuhiko, WAKABAYASHI Yuko, ODA Takashi, TONDOKORO Naoki, YAMAGUCHI Toshimitsu

    IEICE technical report. Welfare Information technology   111 ( 424 )   79 - 84   2012.1

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    People with serious motor disabilities can operate electronic devices like personal computers with the help of a &quot;control-interface switch&quot; operable even by slight voluntary body-movements. Such switches, however, have a defect of being affected significantly by involuntary body movements, resulting in erroneous operations of the devices. Then, we have been attempting to develop a geomagnetic sensor-based control-interface switch, GSN/1, which is able to eliminate involuntary movements. In this paper, we evaluated two characteristics of GSN/1 as follows: 1) detection ability of voluntary movement and 2) elimination ability of involuntary movement. Experiments employing healthy volunteers demonstrated that GSN/1 could be sensitive to thumb movements with a tip motion distance of more than 6 [mm] and insensitive to involuntary body movements like twitch.

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  • Designing of artificial class game using behavior chain and reflex

    IKEDA Yasuko, SATO Terutaka, ITO Nao, MAEDA Yoshinobu, KATO Kosuke

    IEICE technical report. Circuits and systems   111 ( 377 )   43 - 48   2012.1

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    In recent times, the problem of bullying(peer aggression or victimization) has evolved from a situation in which a particular bully attacks a particular victim with negative attributes into one in which a victim may become a bully depending on circumstances. There has been tried to solve the bullying problem from educational, medical and sociological viewpoints. We have investigated a mechanism of the bullying, using an artificial class model (ACM) based on multi-agent simulation. Every agent (or student) is programmed so as to make friends with those who have similar interests, hobbies and tastes. In this report, a gaming simulation, or a serious game, was integrated to the ACM by means of changing one agent to a player who is the participant in the ACM to interact with other agents.

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  • A questionnaire analysis on entertainment game using speech-output interface

    ASAI Ai, MURAYAMA Naoki, TANI Kentaro, MAEDA Yoshinobu, NIIKAWA Takuya

    111 ( 377 )   37 - 42   2012.1

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  • Face extraction for assisting handicapped person's walk and estimation of its direction

    KOYAMA Takuya, MIYAKAWA Michio, MAEDA Yoshinobu

    Technical report of IEICE. PRMU   111 ( 379 )   13 - 16   2012.1

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    Recently, the number of the handicapped person increases with aging. In society, barrier-free is also progressing and came to often pass a handicapped person in town. When people do not notice the existence of the handicapped person, clash with each other and may lead to other accidents for it on this occasion. So, in this research, the quantitative evaluation of whether the circumference is how much careful, perform extraction of the face which may cross by image processing, and presumption of the direction of a face, photo the circumference from the handicapped person side.

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  • 8B16 Development and Application of Voice Output Game System.

    NIIKAWA Takuya, Maeda Yoshinobu

    2012 ( 24 )   "8B16 - 1"-"8B16-2"   2012.1

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  • 透視X線画像と2D/3Dレジストレーションを用いた上腕の肩甲骨面内運動の計測 (第32回バイオメカニズム学術講演会 SOBIM2011 予稿集)

    長澤 憲謙, 林 豊彦, 前田 義信

    バイオメカニズム学術講演会予稿集   32   1 - 4   2011.11

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  • Influence of the number of couplings of cardiac cell models on the beating rhythm

    KIRYU Yuichiro, MAEDA Yoshinobu, IIJIMA Atsuchiko, HAYASHI Toyohiko

    Mathematical Systems Science and its Applications : IEICE technical report   111 ( 294 )   113 - 118   2011.11

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    Cardiac cells generate the action potential, which has relatively long absolute refractory period, so-called, the plateau phase, and, as such, show an acceleration phenomenon, or an increase of the frequency, driven by the low energy consumption when the cells are coupling. In this study, we investigated such a "high-efficiency acceleration phenomenon" on the 40-cell coupling of Noble equation, which is one of the Hodgkin-Huxley type neuron models, using the software insilicoIDE. We were simulated about influences of the number of couplings of cardiac cell models (from 2 to 12 models) As a result, the "high-efficiency acceleration phenomenon" was observed after coupling. Furthermore, it was suggested that there was the optimal number of couplings which gives the influence to the "high-efficiency acceleration phenomenon," and the optical number was nearly equal to that observed in the actual cardiac tissue.

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  • A27 Extraction of characteristic parameters of upper body motion in backhand drive of table tennis

    KAGOSHIMA Syunsuke, HAYASHI Toyohiko, MAEDA Yoshinobu, WATANABE Tetsuya, USHIYAMA Yukihiko

    Symposium on sports and human dynamics   2011   151 - 156   2011.10

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    Backhand drive in table tennis is getting more important in recent years because the rally is becoming speedy. Its coaching method, however, has yet to be established due to the lack of basis motion data. In order to obtain kinematic features in backhand drive for evidence-based coaching, we compared four different backhand-drive motions with an emphasis on speed or control and with top or back spins of the ball. Experiments using five experienced table-tennis players and an optical motion capture system revealed that the angular velocity of the elbow supination and extension should be increased in case of speed emphasis, and the elbow joint valgus would be necessary in case of backspin ball, demonstrating the importance of the elbow joint motion in backhand drive.

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  • Design and manufacture of an electronic circuit model of the CPG with the afferent stimulation

    KUBOTA Masahito, DOMON Tatsushi, MAEDA Yoshinobu, IIJIMA Atsuhiko, ICHIMURA Tomoyasu, HAYASHI Toyohiko

    IEICE technical report. Nonlinear problems   111 ( 243 )   119 - 124   2011.10

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    Biological rhythms are generated by a central pattern generator, or CPG, that are controlled by the spinal neural networks. Rybak et al. proposed mathematical networks of the CPG composed of Hodgkin-Huxley type differential equations, to regenerate their experimental results on the locomotion of the decerebrate cat. Furthermore, they improved the CPG model by afferent feedback terms from extensor and flexor sites. In order to analyze such rhythms and apply to the control engineering, we have constructed hardware neuron and synapse models, and, as such, regenerate the dynamics of the experimental results of the CPG and their mathematical simulation. In this report, we regenerated several dynamics using the hardware CPG with the afferent feedbacks. We thought that it would be easy to control the locomotion robots and real-time simulation by using our hardware models.

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  • Hardware Bursting Neuron Model Analyzed by a Viewpoint of Singularly Perturbed Dynamical System

    MAEDA Yoshinobu

    IEICE technical report. Nonlinear problems   111 ( 243 )   125 - 128   2011.10

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    Neurons show an electrical excitation called the action potential, which are the main actor of information in neural networks. Some neurons show repetitive firings which form the bursting discharge composed of active and silent phases. Mathematical models replicating the neuronal bursting excitation need three variables at least, from a viewpoint of the dynamical system theory. Maeda and Makino (2000) proposed three-capacitance type hardware bursting model, which was equivalent to three-variable dynamical system models. In this report, the method known as dissection (Rinzel and Lee, 1987) is applied to the hardware bursting neuron model proposed by Maeda and Makino, to analyze the mechanism of the bursting generation. To this end, the circuit simulator SPICE is used. As a result, it was suggested that the hardware bursting neuron model should behave like a so-called square-wave bursting.

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  • 錯視現象を説明するアナログ回路型神経ネットワークの設計

    土門立志, 久保田真仁, 前田義信, 塚田 章, 林 豊彦, 飯島淳彦

    生体医工学シンポジウム2011   2011.9

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  • A-1-8 A Modeling of the Job Hunting of New Graduates in Japanese Labor Market

    Horiguchi Kohei, Ito Nao, Maeda Yoshinobu

    Proceedings of the Society Conference of IEICE   2011   8 - 8   2011.8

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  • Efficacy evaluation of parameter optimization for a Cartesian scanning method alternative to mouse-pointer manipulation

    TSUNODA Takuya, HAYASHI Toyohiko, MAEDA Yoshinobu, WATANABE Tetsuya, YAMAGUCHI Toshimitsu, TONDOKORO Naoki

    IEICE technical report   111 ( 174 )   65 - 70   2011.7

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    Personal computers have become indispensable for persons with severe motor disabilities in order to ensure communication and social participation. When such patients carry out a mouse-pointer manipulation, they usually use an operation support software together with a single switch. As typical software for such support, the Cartesian scanning method is widely used. This method necessitates us to determine the values of several parameters in a preparatory stage. This determination, however, has been done on a trial-and-error basis up to now. Then, our previous study proposed a parameter optimization method using measured response time of individual user. Subsequently, we attempted to validate the efficacy of the parameter optimization through experiments using three volunteers with motor disabilities in this study. Consequently, the optimum values were verified to be effective for decreasing the operation time without increasing the number of operation.

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  • A musculoskeletal model-based estimation of shoulder muscle forces for elevating the upper arm in case of rotator cuff tears

    KINOSHITA Naoki, HAYASHI Toyohiko, MAEDA Yoshinobu, WATANABE Tetsuya, TANAKA Hiroshi, NINOMIYA Hiroki, KOMAI Masahiko, NOBUHARA Katsuya

    2011 ( 102 )   19 - 24   2011.6

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  • An artificial class model and a feature on the "flat" communication

    MAEDA Yoshinobu, ITO Nao, TANI Kentaro, SATO Terutaka, KATO Kosuke

    IEICE technical report   111 ( 58 )   63 - 68   2011.5

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    Recently, a bullying problem has transformed from fixed situation which a particular bully attacks to a particular victim with having negative attributes into mobilized one which a victim can become a bully depending on circumstances. It is difficult for every student to foresee when it can be the victim. Therefore, the students have changed the interaction and communication style with others to "flat," in the sense that they are not best friends each other but avoid becoming conflicting. They have to be always approved from peer classmates, to establish their positions in the class. In order to clarify the recent bullying phenomena arising on such "flat" communication, we proposed an artificial class model composed of agents that interact with others using formal sense of values. As a result, we observed several bullying features among the agents. Especially, conflict-avoiding feature proper to the "flat" communication is observed in spite of not programming it in the artificial class model. Furthermore, a bullying feature yielded by power-law distribution that makes teachers be difficult to find bullying phenomena is also observed.

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  • The study on the spatial simulation about the basic property of the social dilemma

    TANI Kentaro, MAEDA Yoshinobu, HAYASHI Toyohiko

    IEICE technical report   111 ( 58 )   59 - 62   2011.5

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    In this study, we simulated the social dilemma game of agents allocated to the lattice on the computer. The social dilemma is one of social phenomena so that the whole society becomes an unfavorable situation, whereas every agent pursues personal profit. Agents are requested whether or not they cooperates to the neighbor. If the agent cooperates, then the agent is cost. However, the agent can gain much profit if many neighbors cooperate with him. Every agent evolves a strategy to enhance own gain through the interaction with others. In this report, we chiefly investigate a possibility of coexistence of cooperation and non-cooperation among agents, spatial chaos, and dynamic fractal.

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  • Training of laryngeal elevation for elderly people using a visual biofeedback of larynx movement

    SATO Masahiro, KAKUSHIMA Keiko, HAYASHI Toyohiko, WATANABE Tetsuya, MAEDA Yoshinobu, MICHIMI Noboru, TANIGUCHI Hiroshige, INOUE Makoto

    17 ( 2 )   150 - 151   2011.2

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  • Artificial class game composed of agents using preferential attachment

    TOMIOKA Shizuka, SATO Terutaka, MAEDA Yoshinobu, ITO Nao, TANI Kentaro, KATO Kosuke

    IEICE technical report   110 ( 384 )   37 - 42   2011.1

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    In order to solve the bullying problem, we have proposed an artificial class model based on the machine agents. In the artificial class, every agent performs the interaction with others, such as the conformity, the inclusion, the exclusion and the distinction, to make friends with having the coincidence on the sense of values. In this report, we introduced a preferential attachment to generate a lot of groups. Furthermore, using the Bayesian update, the action of the agents was improved to make it mimic the human action, to be possible that a human player participates in the artificial class as the gaming simulation.

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  • B1 Extracting the foot position parameter that influence the maximum pronation

    ONO Satoshi, HAYASHI Toyohiko, MAEDA Yoshinobu, IIJIMA Atsuhiko, KIRYU Toru

    The Proceedings of the Symposium on sports and human dynamics   2011 ( 0 )   261 - 265   2011

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    Excessive pronation in running is known to be one of the dominant causes of running injuries. In order to prevent it, the trilateral relationship of pronation, foot anatomy, and shoe structure has been studied in detail up to now. In addition, we assumed that the foot position at the heel contact (HC) and running speed could also affect pronation significantly. Then, we studied the relationship among foot motion, shoe sole stiffness and running speed using a multi-regression analysis. We conducted several experiments using 11 experienced runners, an optical motion capture system, a treadmill with two different speed and two types of running shoes with different inner-sole stiffness. Consequently, in low-stability shoe, pronation could be estimated primarily by foot position at HC and this relationship between them depended upon running speed. In high-stability shoe, on the other hand, the same relationship could not hold, probably due to other primary personal factors.

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  • Efficacy evaluation of parameter optimization for a Cartesian scanning method alternative to mouse-pointer manipulation

    13   65 - 70   2011

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  • Measurement of the position and orientation of the humerus using a combination of fluoroscopic image and 2D-3D registration

    NAGASAWA Noriaki, HAYASHI Toyohiko, TANAKA Hiroshi, KOMAI Masahiko, NINOMIYA Hiroki, MAEDA Yoshinobu, WATANABE Tetsuya, NOBUHARA Katsuya

    IEICE technical report   110 ( 294 )   75 - 80   2010.11

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    Video Fluoroscopy (VF) is widely used in clinic for recording in-vivo shoulder joint motions in two dimensions. In order to achieve VF-based 3-D measurement, a method using a combination of fluoroscopic image and a 3-D model of the bone has been developed by using a 2D/3D registration technique. Since its measurement accuracy depends on the bone shape and other measurement conditions, the measurement accuracy of the humeral position and orientation also has to be validated before measurement. To achieve this, we developed an empirical system using a humeral bone model, a bone-fixation equipment with high reproducibility and an X-ray projection calibration frame. Using this system, we validated the accuracy in the three different humeral orientations within the scapula plane with an elevation angle of 30[deg], 60[deg] and 90[deg]. The accuracy in the orientation was verified to be less than 1 [deg] on average in adduction/abduction and horizontal adduction/abduction, and to be less than 4[deg] on average in internal and external rotation. The accuracy in the position was verified to be less than 1[mm], 2[mm] and 5[mm] on average in the supero-inferior, medio-lateral and antero-posterior positions, respectively.

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  • Development of Entertainment Game (Rotation Shogi) using Speech-Output Interface

    MURAYAMA Naoki, TANI Kentaro, ITO Nao, MAEDA Yoshinobu

    IEICE technical report   110 ( 221 )   121 - 125   2010.10

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    A wide range of assistive technologies to support the visually impaired persons have been developed to enhance the activities of daily living (ADL). However, enhancing not only the ADL but also the quality of life (QOL), such as an entertainment game, is needed to relieve some of their stress. Such games should be developed from the following two viewpoints; One is that the visually impaired persons are on an equality with the sighted persons at the game whether they win or not. The other is that the game must be played without visual information by the players, and, as such, must be played using only auditory information as one of the alternative perceptions of the visual cue. In this report, we developed Japanese backgammon type game played by four players, so-called, Japanese rotation shogi, using the speech-output interface. In the experiment, four players, composed of two sighted and two visually impaired, were evaluated by the Csikszentmihalyi's flow.

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  • Development of Entertainment Game (Rotation Shogi) using Speech-Output Interface

    MURAYAMA Naoki, TANI Kentaro, ITO Nao, MAEDA Yoshinobu

    IEICE technical report   110 ( 219 )   121 - 125   2010.10

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    A wide range of assistive technologies to support the visually impaired persons have been developed to enhance the activities of daily living (ADL). However, enhancing not only the ADL but also the quality of life (QOL), such as an entertainment game, is needed to relieve some of their stress. Such games should be developed from the following two viewpoints; One is that the visually impaired persons are on an equality with the sighted persons at the game whether they win or not. The other is that the game must be played without visual information by the players, and, as such, must be played using only auditory information as one of the alternative perceptions of the visual cue. In this report, we developed Japanese backgammon type game played by four players, so-called, Japanese rotation shogi, using the speech-output interface. In the experiment, four players, composed of two sighted and two visually impaired, were evaluated by the Csikszentmihalyi's flow.

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  • Development of Entertainment Game (Rotation Shogi) using Speech-Output Interface

    MURAYAMA Naoki, TANI Kentaro, ITO Nao, MAEDA Yoshinobu

    IEICE technical report   110 ( 220 )   121 - 125   2010.10

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    A wide range of assistive technologies to support the visually impaired persons have been developed to enhance the activities of daily living (ADL). However, enhancing not only the ADL but also the quality of life (QOL), such as an entertainment game, is needed to relieve some of their stress. Such games should be developed from the following two viewpoints; One is that the visually impaired persons are on an equality with the sighted persons at the game whether they win or not. The other is that the game must be played without visual information by the players, and, as such, must be played using only auditory information as one of the alternative perceptions of the visual cue. In this report, we developed Japanese backgammon type game played by four players, so-called, Japanese rotation shogi, using the speech-output interface. In the experiment, four players, composed of two sighted and two visually impaired, were evaluated by the Csikszentmihalyi's flow.

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  • 二段型CPG電子回路モデルのPF層を除く簡約化について

    金子怜史, 久保田真仁, 前田義信, 林 豊彦, 加納慎一郎, 塚田 章

    生体医工学シンポジウム2010   2010.9

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  • Improvement of thyroid hormone control system in tail resorption program of Xenopus laevis

    Sasaki Akiyoshi, Izutsu Yumi, Maeda Yoshinobu, Hayashi Toyohiko

    IEICE technical report   110 ( 52 )   7 - 11   2010.5

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    Tail resorption takes place during metamorphosis in Xenopus laevis. Tail resorption has been thought to be controlled by a programmed cell death. However, we think tail resorption is controlled by a immune system. We proposed, then, a model of Thyroid hormone control system to analyze the tail resorption program. This model was not included Thyroid hormone receptor (TR), that is thought to be key factor of amphibian metamorphosis. In this report, we add TR to the model.

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  • An Experimental Study on Legibility of Braille Characters for Beginners

    MURAKAMI Shiori, WATANABE Tetsuya, MAEDA Yoshinobu, YAMAGUCHI Toshimitsu

    IEICE technical report   110 ( 53 )   9 - 14   2010.5

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    At the first stage of braille learning, it is preferable to use braille characters which are easy for beginners to read tactually. This is the motive for exploring such braille characters through an experiment. The experimental results showed that braille characters with less than three dots, space in the second row, or a simple arrangement of dots were read with short reading times. At the same time, it was found that beginners tend to misunderstand the angle of the dotted lines and miss the space in the second row. Based on these results, we discussed the relationship between the arrangement of the dots and the reading time and the application of the experimental results to braille educational textbooks.

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  • Activities of Niigata IT Support Center for Persons with Disabilities : Current Status and Future Tasks of IT Support System in Niigata City

    YAMAGUCHI Toshimitsu, MARUYAMA Satoko, HAYASHI Toyohiko, WATANABE Tetsuya, MAEDA Yoshinobu

    IEICE technical report   110 ( 53 )   79 - 82   2010.5

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    IT support centers for persons with disabilities in local areas have a small number of staff members and volunteers as well as clients. This situation makes it difficult to supply high quality services continuously. Additionally, large support areas make it difficult for the supporters to travel over to the users, vice versa, in terms of cost and time. This paper describes the current status of one of local support centers, Niigata IT Support Center for Persons with Disabilities, to share and discuss the tasks with other local support centers.

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  • Simulation on the small-world network of Noble equation

    KOMATSU Kouki, KIRYU Yuichiro, MAEDA Yoshinobu, HAYASHI Toyohiko

    IEICE technical report   110 ( 52 )   31 - 34   2010.5

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    A cardiac cell keeps the potential plateau in the absolute refractory period, and, as a result, peculiar behaviors are observed in the coupling system of the cells. Meunier showed the so-called acceleration phenomenon whereby the oscillation accelerated after coupling of the Hodgkin-Huxley type models. Maeda et al. showed that energy consumption can be reduced when the acceleration phenomenon is observed, from the study using hardware models. In this report we investigated that, when the coupling system formed as the ring lattice network was replaced with the small-world network, two reductions of the period and the energy consumption simultaneously occur on the diffusively coupling of 20 Noble equations which are Hodgkin-Huxley type models of the cardiac cell.

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  • A semi-automatic extraction of the contour of the articular cartilage from MR images of the knee

    SATO Hiroki, HAYASHI Toyohiko, OMORI Go, WATANABE Satoshi, SASAGAWA Keisuke, MAEDA Yoshinobu, WATANABE Tetsuya

    IEICE technical report   110 ( 52 )   41 - 46   2010.5

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    Knee motion analysis has many clinical applications such as diagnosis of knee diseases and evaluation of postoperative knee functions. For analyzing knee motion in three-dimensions, a 3-D model based approaches were introduced recently by combining a fluoroscopic image-sequence of knee motion and a 3-D model of related knee bones. In order to expand such analysis into that including the articular cartilage, we need a 3-D model of the cartilage as well as bones. Then this paper proposed a semi-automatic extraction of cartilage contour in MR images. This extraction method has an advantage that a contour of the cartilage partly unclear in MR image can be estimated iteratively by using a function of evaluating the overall difference between present contour and that estimated from its neighboring gray distribution, from an initial contour roughly digitized manually. To evaluate its validity, we carried out several experiments using two different MR images of the knee. All empirical results suggested that our method would have a potential of easily extracting an accurate contour of the cartilage with high reproducibility.

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  • Automatic adjustment of bite force according to food texture in chewing-like jaw movement of autonomous jaw-movement simulator JSN/3A

    KAWATA Mitsuhiro, HAYASHI Toyohiko, NAKAJIMA Shinichi, INOUE Makoto, MAEDA Yoshinobu, WATANABE Tetsuya

    16 ( 2 )   132 - 133   2010.2

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  • Reduction of the reciprocal inhibition based hardware neuronal network

    KANEKO Satoshi, SOZUKA Takuya, MAEDA Yoshinobu, HAYASHI Toyohiko

    IEICE technical report. Signal processing   109 ( 435 )   233 - 234   2010.2

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    A central pattern generator (CPG) is a half-center rhythm generator, which is constructed from neural networks of the mammalian spinal cord. The CPG generates rhythmic locomotion. Thus it can transmit alternating rhythmic activity of extensor and flexor sites, in the absence of external rhythmic input. This mechanism contributes to generate involuntary walking patterns of the mammalian. In this study, we rearranged the CPG structure of locomotion pattern generation, and, as such, divided the circuit system into four categories with preserving the dynamics.

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  • Parameter optimization of Cartesian-cursor method in scanning mouse emulations alternative to mouse manipulation

    ISHIKAWA Shingo, KOYAMA Kenji, HAYASHI Toyohiko, MAEDA Yoshinobu, WATANABE Tetsuya, NAKAMURA Yasuo, WAKABAYASHI Yuko, TONDOKORO Naoki

    IEICE technical report   109 ( 358 )   35 - 40   2010.1

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    Personal computers are indispensable for persons with severe motor disabilities to ensure communication and social participation. For poinier operation, they usually use a scanning mouse emulator together with a single switch. As a typical emulator, Cartesian-cursor method is widely used in most interface software assisting computer operation. Several parameters of the method, however, have been determined based on empirical knowledge or on a trial-and-error basis. In order to determine them from user's physical ability, we investigated the relations between parameter values and total operation time by means of computer simulation in this study. If user's response time is given empirically, we already proposed how to optimize the speed of cursor movement and focus stationary time in a previous study. In addition, this study demonstrated that the ratio of high speed to low speed and the travel distance of the cursor before acceleration can also be optimized.

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  • Performance evaluation of control-interface switch GSN/1 using a geomagnetic sensor

    12   13 - 18   2010

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  • Knee Motion Parameters for Evaluating Muscle Fatigue during Parallel Squatting

    ONUKI Takashi, KIRYU Tohru, HAYASHI Toyohiko, MAEDA Yoshinobu, WATANABE Tetsuya

    IEICE technical report   109 ( 332 )   23 - 28   2009.12

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    Recently musclar strength training is getting popularity in nursing facilities due to its introduced into the care program. In order to carry out such training safely and effectively, we have to customize several training parameters such as the load and the frequency. In an attempt to establish a customization method, we have been studying biometric information-based methods for evaluating muscle fatigue during training. This study analyzed how motion parameters regarding electromyography and movement of the lower extremity changes over time during repetitive squat movement. Experiments employing 10 healthy subjects demonstrated that muscle fatigue primarily affected the maximum angular velocity during flexion and electromyography in the motion phases near the maximum flexion.

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  • The Effects of Guidance Force of Robot-Driven Gait Orthosis "Lokomat" on Muscle Activation and Joint Kinematics of Lower Extremity during Walking

    AOKI Sachiko, KIRYU Tohru, HAYASHI Toyohiko, NAKAZAWA Kimitaka, NAKAJIMA Tsuyoshi, MAEDA Yoshinobu, WATANABE Tetsuya

    IEICE technical report   109 ( 332 )   17 - 22   2009.12

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    In recent years, gait rehabilitation for patients with spinal cord injury has been progressed by introducing advanced robotics. As an equipment for such advanced rehabilitation, robot-driven gait orthosis "Lokomat[○!R]" (Hocoma AG) is available. In order to promote patient's voluntary muscle activity, Lokomat[○!R] has a function of adjusting the driving torque for knee and hip joints required for gait. Parameter regarding this torque adjustment is named the guidance force (GF). This study analyzed the relationship between the GF value and electromyography and motion of the lower extremity under nearly the same kinematic condition, in an attempt to clarify the effects of the GF value on patient's gait. Experiments employing 5 healthy volunteers demonstrated that the decrease of the GF value affected primarily to the local activity in electromyography of the lower extremity without modifying overall activity pattern as well as the ratio of 4 gait phases in kinematics.

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  • 車椅子利用者を考慮した避難行動シミュレーション

    山口 直人, 谷 賢太郎, 伊藤 尚, 小西 孝史, 前田 義信, 林 豊彦, 渡辺 哲也

    電気学会東京支部新潟支所研究発表会予稿集 = 電気学会東京支部新潟支所研究発表会予稿集   ( 19 )   47 - 47   2009.11

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  • 活動電位を再現する電子回路ニューロンモデル研究からの考察

    前田義信, 林 豊彦, 加納慎一郎, 塚田 章

    電子情報通信学会技術研究報告   109 ( 279 )   47 - 50   2009.11

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  • Accuracy of Pupil Detection with and without Head Restraints

    KIRYU Yuichiro, IIJIMA Atsuhiko, KAWASAKI Keisuke, MIYAKAWA Naohisa, MAEDA Yoshinobu, HASEGAWA Isao

    IEICE technical report   109 ( 194 )   19 - 22   2009.9

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    Head movement during video oculography is considered as a major source of artifacts. However, little quantitative information is available as to how pupil detection is affected by head motions. Here we show that the accuracy of pupil detection was significantly higher with head fixation devices than without ones in humans. Moreover, a preliminary study in a macaque monkey indicated that some visual targets on a screen or reward apparatus could improve pupil detection under non head-fixated conditions. These results confirmed the importance of had fixation in video oculography.

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  • Quantitative Classification of Pedaling Skill of Power-Assisted Bicycles Using Discriminant Analysis based on Mahalanobis Distance

    INADA Hiroaki, KIRYU Tohru, MAEDA Yoshinobu, HAYASHI Toyohiko

    IEICE technical report   109 ( 194 )   1 - 6   2009.9

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    In this report, we evaluated pedaling skills from muscle activation patterns of both vastus lateralis of agonist and biceps femoris of antagonist, to classify them quantitatively. To this end, four parameters to classify muscle activation were prepared by means of calculating cross-correlation coefficients between the above two muscles. In the four-parameter space, we classified the pedaling skills into four groups in terms of the discriminant analysis based on Mahalanobis distances. As a result, the classification method presented in this report corresponded about 70.6% accuracy with a qualitative classification based on the human subjectivity. Furthermore, the groups classified by this method were statistically more significant than the qualitative classification.

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  • Detection of intentional blinking using versatile single switch VSN/1 with a photo-reflective sensor array

    YAJIMA Daisuke, HAYASHI Toyohiko, WATANABE Tetsuya, MAEDA Yoshinobu, WAKABAYASHI Yuko, WATANABE Satoshi, ABE Akira, YAMAGUCHI Toshimitsu

    IEICE technical report   109 ( 152 )   11 - 16   2009.7

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    Persons with severe motor disabilities usually use a single switch for operating personal computer. Patients with progressive motor disabilities have difficulty in the purchase of a switch and the training for its skillful use, due to frequent update of the switch according to the progression of disabilities. Then we have been developing a versatile single switch, VSN/1, with a photo-reflective sensor array, which is applicable to the detection of both blinking and finger motion. Its data processing schemes for the two motions, however, were slightly different with each other, limiting its versatility in application. To eliminate this limitation, this study proposed a versatile detecting method applicable to both blinking and finger motion. This method was verified to be effective for detecting blinking accurately through experiments using five healthy volunteers.

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  • Evaluation of dynamics of multi-agent producer economic model

    ITOU Nao, MAEDA Yoshinobu, HAYASHI Toyohiko, WATANABE Tetsuya

    IEICE technical report   109 ( 152 )   17 - 22   2009.7

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    In recent years, a "social divide", such as income and professed divides, has noticed as one kind of social issue. It is defined that, in the divided groups, the member belonged to one group cannot move on any other groups. Such fixation of social careers causes non-activation of economy. In this study, we suggested a dynamic economic model described by a multi-agent system, and evaluated it's dynamics in order to try to understand mechanisms how the social divide emerges in the model. We used Gini's coefficient to evaluate the social divide and the economic efficiency. As a result, it's suggested that high competitiveness economics have higher negative relation between Gini's coefficient and the economic efficiency than low competitiveness one.

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  • PC Class in Niigata University for the visually impaired

    MAEDA Yoshinobu, HAYASHI Toyohiko, HORI Junichi, ISHIWATARI Hiroki, IWAKI Mamoru, WATANABE Tetsuya, YAMAGUCHI Toshimitsu

    IEICE technical report   109 ( 152 )   27 - 32   2009.7

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    Department of Biocybernetics, Faculty of Engineering, Niigata University, opened a PC class for the visually impaired who lived in Niigata Prefecture, in cooperated with Niigata Prefectural Association of the Visual Impairment, in 2003. So far, we have had twelve classes for six years. In this technical report, we reported this PC class, which is one of the contribution of Niigata University to the visually impaired.

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  • Influence of the change of the environmental condition on solving second-order free-rider problems using the generalized tit-for-tat strategy

    TANI Kentaro, MAEDA Yoshinobu

    Human Interface   11 ( 2 )   201 - 204   2009.5

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  • Influence of the change of the environmental condition on solving second-order free-rider problems using the generalized tit-for-tat strategy

    TANI Kentaro, MAEDA Yoshinobu

    IEICE technical report   109 ( 27 )   201 - 204   2009.5

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    This paper presented how the change of the environmental condition affects the solution of social dilemma including the second-order dilemma. Such social dilemma can be solved by using generalized tit-for-tat (TFT) strategy, which is an extended version tit-for-tat strategy applied in n-person games. However, it was not suggested what kind of environmental condition be achieved the solution. In this paper, we formally modeled a community by using a multi-agent system, and simulated it under various environmental conditions. As a result, a cooperation tendency of the agents changed by depending on the cost necessary to the cooperation. Furthermore, the cooperation tendency did not changed depending on the size of gain, but changed depending on the penalty point.

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  • Influence of the change of the environmental condition on solving second-order free-rider problems using the generalized tit-for-tat strategy

    TANI Kentaro, MAEDA Yoshinobu

    IEICE technical report   109 ( 28 )   201 - 204   2009.5

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    This paper presented how the change of the environmental condition affects the solution of social dilemma including the second-order dilemma. Such social dilemma can be solved by using generalized tit-for-tat (TFT) strategy, which is an extended version tit-for-tat strategy applied in n-person games. However, it was not suggested what kind of environmental condition be achieved the solution. In this paper, we formally modeled a community by using a multi-agent system, and simulated it under various environmental conditions. As a result, a cooperation tendency of the agents changed by depending on the cost necessary to the cooperation. Furthermore, the cooperation tendency did not changed depending on the size of gain, but changed depending on the penalty point.

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  • A-15-28 Modeling on Operation of Button Interface Console

    Maeda Yoshinobu, Miyakawa Michio, Koyama Nozomu

    Proceedings of the IEICE General Conference   2009   264 - 264   2009.3

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  • A basic experiment on convenient design of button interface

    MAEDA Yoshinobu, MIYAKAWA Michio, KOYAMA Nozomu

    IEICE technical report   108 ( 254 )   1 - 6   2008.10

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    On the button interfaces used in information devices, such as controllers, automatic teller machines (ATM) and ticket machines, we programmed a virtual button-interface software to assess workload. Then, the total operation time, the number of clicks and the click intervals were experimentally measured. The 35 subjects, formed themselves in groups of 5 using 7 sorts of interface identified by the number of buttons, accomplished the task of inputting the Japanese family names which composed of 6 alphabets. As a result, the total operation time changed non-monotonously against the number of buttons, and was a minimal point when the number of buttons is set around 18 on the interface window. In order to clarify why such a unique minimum appears, we phenomenologically modeled the non-monotonous change of total operation time using liner equation, composed of two variables on the workload, i.e., the search and operation behaviors. It was suggested that anti-synergism of them for the workload generated the non-monotonousness.

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  • Guidance information method of a position guidance system for the visually impaired

    KONISHI Takashi, MAEDA Yoshinobu, TANO Eiichi, MAKINO Hideo

    IEICE technical report   108 ( 170 )   25 - 30   2008.7

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    We proposed a new guidance scheme of the GPS-GIS-based speech guidance system using the adaptive fuzzy inference neural network (AFINN). Geographic Information System (GIS) calculates some attributes of user-to-landmark relations, so-called, landmark celebrity, landmark facade, landmark area, representative point of latitude and longitude (the center of gravity) of the landmark, user's latitude and longitude from GPS, and user's direction. These attributes were transformed to six basic elements, such as the celebrity, the facade relative bearing, the Euclidean distance between the landmark and user, the area size, the direction relative bearing and the user's individual data, respectively. The AFINN, that has the above six elements as the input data, calculates a level of importance (LOI) corresponding to a "cognitive distance". We considered that acceptable guidance was achieved by using the LOI. We applied the analytic hierarchy process (AHP) to the leaning data of the AFINN. Therefore, the guidance system reflected user's preference, and obtained the guidance suitable for diverse users. Numerical simulations suggested that the AFINN should be available for determining the guidance satisfying each user. Finally, the visually impaired pedestrians evaluated the guidance system from the user's viewpoints.

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  • A-15-11 Usability Evaluation of Various Switches Used in Multipurpose Remote Console.

    Kato Toru, Miyakawa Michio, Maeda Yoshinobu

    Proceedings of the IEICE General Conference   2008   262 - 262   2008.3

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  • A-2-34 Participation-type agent simulation game for making friends in the classroom

    Maeda Yoshinobu

    Proceedings of the IEICE General Conference   2008   73 - 73   2008.3

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  • Addition of Function to presume landmark-contained routes in Route Selection Software

    KOMO Yutaro, MAEDA Yoshinobu

    IEICE technical report   107 ( 433 )   53 - 58   2008.1

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    The 40% visually impaired people, or Hikikomori, have low self-efficacy on travel because their guide helpers in traveling lead always them to the destination safely. Then, it is few for the Hikikomori visually impaired to have opportunity of self-determination on travel. We have developed the AHP-GIS-based travel assist system for the visually impaired of especially the 40% who are almost staying home. To promote their outgoings, they should decide, or advise equally the guide helper, when determining the travel route. The system developed tends to assist the self-determination of users. In this report, we presented that the system was added new function to presume landmark-contained routes, and, as such, outputted the better route of satisfying user's preferences at least the 12 sighted university students. We tested the validity of this method in the Bandai district of Niigata city, and the addition of new function increased significantly the AHP score.

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  • Influence of spatially restricted condition on the solution to social dilemma

    TANI Kentaro, ITO Nao, MAEDA Yoshinobu

    Human Interface   9 ( 5 )   43 - 46   2007.12

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  • Study on the social divide using a reinforcement learning MAS model

    ITO Nao, MAEDA Yoshinobu

    Human Interface   9 ( 5 )   73 - 76   2007.12

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  • Fluorescent Light Communication: a Study of Waveform Characteristics and Decoding Methods -Transmission Speed and Sampling Frequency-

    KOBAYASHI Suguru, MAKINO Hideo, LIU Xiaohan, YOSHIDA Hiroshi, MAEDA Yoshinobu

    2007 ( 118 )   15 - 22   2007.11

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    Indoor pedestrian navigation systems using a location based service will become as useful as the better known 'GPS' outdoor systems. We have proposed a digital signal processing method for signals in a fluorescent light (FL) communication system. In this paper we investigate transmission speeds and sampling frequencies when using FL communication. The first step is to calculate the upper transmission speed and to propose how to reduce sampling frequency. Based on the analyses of their parameters we have used a decoding method with a transmission speed of 19.2kbps, and a sampling frequency of 1MHz, at a distance of 3.0m between a photo sensor and the FL, and we have checked the bit error rate associated with the digital signaling process. Our experiments have confirmed that the error rate of each decoded bit was less than 10^<-6>.

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    Other Link: http://hdl.handle.net/10191/25821

  • Influence of spatially restricted condition on the solution to social dilemma

    TANI Kentaro, ITO Nao, MAEDA Yoshinobu

    IEICE technical report   107 ( 368 )   43 - 46   2007.11

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    The purpose of this study is to investigate how spatially restricted condition affects solution of social dilemma. We often get social information, whereas we do not get the all. We are provided only local information around ourselves. In our study, we presented the multi-agent system model with spatially restricted condition as the information limited, and investigated influence on social dilemma. As a result, the spatially restricted condition made the model's society keep stable, but the whole benefit of agents reduced. It was suggested that an appropriate amount of spatially restricted condition should reproduce both benefit and stability of the model's society.

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  • Study on the social divide using a reinforcement learning MAS model

    ITO Nao, MAEDA Yoshinobu

    IEICE technical report   107 ( 368 )   73 - 76   2007.11

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    In recent years, a "social divide" such as income and professim divides, has noticed as one kind of social issue. It is defined that, in the divided groups, the member belonged to one group cannot move on any other groups. Such fixation of social careers causes non-activation of ecomomy. In this study, we suggested the dynamic economic model described by a multi agent system, and tried to understand mechanisms how the social divide emerges in the model. Particularly we discussed how achieved a good balance between fairness and efficiency in the model.

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  • Participation-type agent-based simulation of group formation and minority exclusion

    MAEDA Yoshinobu, NAGASAWA Miwako

    IEICE technical report   107 ( 273 )   7 - 12   2007.10

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    Bullying is one of social problems and we have to solve this problem for happiness and well-being of the individuals. It is very important for junior high school students that, to make friends, they find conunon sense of values, such as similar interests, same hobbies, and some kind of common activity or striving. However, a few students who cannot find the common sense of values are capable to be the minority, or the potential victim of the bullying. To describe such phenomena, we proposed the formalized agent-based model of both the group formation and minority exclusion to clarify the appearance of the minority. Secondly, in order to model real organizations and social phenomena as hybrid multi-agent systems consisting of both human and machine agents, we upgraded the model to a participation type, so-called, multi-agent system model with making the gaming simulation possible. Thus, an actual player could interact the machine agent, or agent, who worked by the stochastic rules of the model. We examined the availability in both university students and a junior high school student, and obtained similar results so as to be shown by the formalized agent-based model.

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  • 情報通信部門 災害地理情報分野の活動

    牧野 秀夫, 木竜 徹, 前田 義信, 今井 博英, 萩原 威志

    新潟大学災害復興科学センター年報   ( 1 )   131 - 135   2007

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  • Route Selection Software for the Visually Impaired using Relative Position Measurement Approach

    KOUMO Yutaro, MIYAJI Takaaki, MAEDA Yoshinobu, MIYAKAWA Michio

    Human Interface   8 ( 5 )   17 - 22   2006.12

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  • Behavior of a coupled system of circuit models reproducing action potentials

    HAYAKAWA Akinori, MAEDA Yoshinobu

    IEICE technical report   106 ( 413 )   7 - 10   2006.12

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    A coupled system of nonlinear differential equation models that reproduce action potential form shows chaotic complex behaviors and acceleration phenomena. In this report, we investigated behaviors of electronic circuit models reproducing action potentials, proposed by Maeda et al. The electronic circuit model is effective in discussing relation between simultaneously dynamics and power consumption (or energy consumption), whereas the differential equation model contributes to the analysis of dynamics. When the coupled resistance is relatively small, a coupled system of this electronic circuit model shows acceleration phenomena with low power consumption, and, as such, shows that the synchronized period is small and the power consumption is reduced in the coupled system. Conversely, when the coupled resistance becomes large, the synchronization collapses and progressive wave is observed. We investigated the generation of the progressive wave in relation to the peristaltic motion, from the viewpoint of the power consumption.

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  • Group formation dynamics in the interaction of agent model

    OHTAKI Makiko, MAEDA Yoshinobu

    IEICE technical report   106 ( 413 )   11 - 16   2006.12

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    School bullying is one of the most important problem we must solve, but we have never found clues of solution. This study examines a school bullying by MAS (Multi-Agent System) method, based on an assumption that the bullying emerges from perspective of student-student interaction [9]. In the report, we presented two improved models based on the original model [9], "Teacher-agent added model" and "Substituted conformity model". Then, by simulating these models, we proposed to understand group formation dynamics and the bullying structure.

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  • Route Selection Software for the Visually Impaired using Relative Position Measurement Approach

    KOUMO Yutaro, MIYAJI Takaaki, MAEDA Yoshinobu, MIYAKAWA Michio

    IEICE technical report   106 ( 408 )   17 - 22   2006.11

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    We have developed the AHP-GIS-based travel assist system for the visually impaired of especially the 40% who are almost staying home (Hikikomori). The Hikikomori visually impaired people have low self-efficacy on travel because their guide helpers in traveling lead them to the destination safely. Then, it is few for the Hikikomori visually impaired to have opportunity of self-determination on travel. The visually impaired should decide, or advise equally the guide helper, when determining the travel route. This system developed tends to assist the self-determination of the Hikikomori visually impaired. In this report, we suggest that, in the AHP or the decision-making process of the system, a relative position measurement approach should be available in comparison with the other approaches.

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  • Fluorescent light communication: a study of waveform characteristics and decoding methods

    KOBAYASHI Suguru, MAKINO Hideo, LIU Xiaohan, KUDO Jumpei, MAEDA Yoshinobu

    2006 ( 116 )   101 - 108   2006.11

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    Indoor pedestrian navigation systems using a location based service will be as useful as the better known 'GPS' outdoor systems. We have been studying a position based system using fluorescent light communication. In this paper we describe how to extract location signals from fluorescent light using digital signal processing. The first step is to calculate the optimal sampling frequency for the signal processing. This is followed by an analysis of the characteristics of the received waveform from the fluorescent light. Based on the analyses of the waveform characteristics we used a decoding method with a sampling frequency of 2MHz at the 1.5m distance between a photo sensor and the fluorescent. Our experiments confirmed the suitability of the method and the error rate of each decoded bit was less than 10^<-4> in all combinations of 8 bit length transmission signal patterns.

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  • Development of an Indoor-outdoor Information Input Program as a Pedestrian Location Guidance System

    TAKAMI Ryo, MAKINO Hideo, MAEDA Yoshinobu

    2006 ( 116 )   109 - 116   2006.11

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    A pedestrian location guidance system will make it possible to guide a person using GPS position information, using visible light communication or RFID. To prepare guidance data for the system, we have developed an indoor-outdoor information input program. The program uses GIS data as the outdoor layer and CAD (Computer Aided Design) data as the indoor layer to delimit the data area. However, there are many kinds of CAD data formats; so we handled them as bitmaps, and used image processing to improve the accuracy of the indoor information database. Experimentally, we confirmed an improvement of the accuracy of the indoor information database.

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  • 注視点情報を用いた適応型読書拡大器の試み

    宮澤洋一, 宮川道夫, 前田義信, 堀潤一, 玉木徹, 岡本明, 田中正太郎, 小熊隆史, 武田紗路, 青柳真人

    日本生体医工学会大会プログラム・論文集   45th   585   2006.5

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  • A-19-1 A preliminary study of obstacle avoidance in location guidance system for visually handicapped

    Monma Yoshinari, Makino Hideo, Maeda Yoshinobu

    Proceedings of the IEICE General Conference   2006   319 - 319   2006.3

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  • The Basic Studies on the CCTV Reading System Used Gazing Point

    TANAKA Shotaro, OGUMA Takashi, TAKEDA Sachi, AOYAGI Masato, MIYAKAWA Michio, MAEDA Yoshinobu, TAMAKI Toru

    2005 ( 25 )   7 - 12   2005.11

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  • Consideration to concern numbers of best buttons of interface device

    TAKANO Tomoe, MIYAKAWA Michio, MAEDA Yoshinobu

    2005 ( 25 )   1 - 6   2005.11

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  • Development of an Indoor-outdoor Speech Input Program as an Universal Location Guidance System

    TAKAMI Ryo, MAKINO Hideo, MAEDA Yoshinobu

    IEICE technical report. ME and bio cybernetics   105 ( 304 )   31 - 34   2005.9

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    An universal location guidance system will make it possible to guide a person using (GIS/GPS) position information, coupled through a visible light communication method or RFID. To prepare guidance data for the system, we have developed an indoor-outdoor speech input program. The program uses GIS data as the outside, or external layer and CAD data as the indoor or internal layer to localize the data area. Experimentally, the first step is to create the information database. The first component of the data base is the specification of the guidance information data at each layer and then the input of the speech information data. Secondly, we confirmed that we could receive speech guidance to each position.

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  • Route Inference in an AHP-GIS-based travel assistive system

    MIYAJI Takaaki, MAEDA Yoshinobu, MAKINO Hideo

    IEICE technical report. Welfare Information technology   105 ( 186 )   15 - 20   2005.7

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    To encourage a travel of the negative blind persons for going out, so-called Hikikomori, we have developed the AHP(Analytic Hierarchy Process)-GIS(Geographic Information System)-based travel assistive system for the visually impaired. In this system the users can select a travel route from several available routes reflecting their favorite. We would like to promote their self-efficacies for travel using this sort of decision-making opportunity, presented by our AHP-GIS system. In this report, the factor analysis was introduced to a road database of the AHP-GIS system to find the above available routes. Eventually we showed the validity of this method in the Bandai district of Niigata city.

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  • Multi-agent simulation on a school bullying emerged from the mobbed group

    ANEZAKI Kazuya, MAEDA Yoshinobu, MAKINO Hideo

    IEICE technical report. Welfare Information technology   105 ( 186 )   61 - 66   2005.7

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    A school bullying is a serious problem in the world. In order to vanish the school bullying, it is necessary to consider it from various fields such as the school counseling, the psychological sociology and the mathematical engineering. We set the mobbed classroom model (multi-agent system) in the personal computer to consider the bullying problem from the viewpoint of the mathematical engineering. In our model, every agent (students) has the several value formulated and interacts randomly with the other agents. Although our model was simple, the agents found a unique agent out as a heterogeneous person. In this report, we report that if the agent interacts, not randomly but friendly, the bullying problem can be reduced.

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  • A Study on the CCTV System with Gazing Point Tracking Ability

    MAEDA YOSHINOBU, MAEDA YOSHINOBU, OGUMA TAKASHI, ISHIGURO TAKASHI, MIYAKAWA MICHIO, MIYAKAWA MICHIO, TAMAKI TOORU, HORI JUN'ICHI, HORI JUN'ICHI

    ヒューマンインタフェースシンポジウム論文集   2005 ( 1 )   241-244   2005

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  • Studies on the Effective Use of Gazing Point Information for the CCTV Reading System

    TANAKA SHOTARO, MAEDA YOSHINOBU, MAEDA YOSHINOBU, MIYAKAWA MICHIO, MIYAKAWA MICHIO, TAKEDA SACHI, AOYAGI MASATO, TAMAKI TOORU, HORI JUN'ICHI, HORI JUN'ICHI

    ヒューマンインタフェースシンポジウム論文集   2005 ( 2 )   845-848   2005

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  • A position guidance system for the blind using lighting apparatus : An improvement of the optical characteristic

    MATSUSAKA Nohiriro, MAKINO Hideo, WATANABE Reiji, YAMANOUCHI Hiroaki, MAEDA Yoshinobu, ISHII Ikuo

    IEICE technical report. ME and bio cybernetics   104 ( 500 )   17 - 20   2004.12

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    To develop a universal location guidance system for the blind, we are studying an indoor location positioning method. For such purposes, several new information transmission methods using a fluorescent light were proposed by Steven Leeb et. al. However, in the case of digital data transmission using frequency modulation, there are difficulties for high-speed data transmission because of brightness fluctuation in fluorescent light. In this paper, using a guidance system developed by our group, we examined the position data transmitted at the speed of 4800 bps, and observed a fluctuating receiving signal in the speed of 9600 bps. Moreover, in case information is transmitted, we describe flickering generated from a fluorescent light.

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  • Coupling of Nonlinear Circuit Oscillators Reducing the Power Consumption

    YAGI Eiji, MAEDA Yoshinobu, MAKINO Hideo, HIRONO Mikihiko

    IEICE technical report. Circuits and systems   103 ( 569 )   41 - 46   2004.1

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    Neurons and cardiac cells transmit the physiological information by propagating the action potentials. We proposed an electronic circuit oscillator model especially for the cardiac cells. The diffusively coupled system of these hardware models shows the acceleration phenomena, whose periods get shorter than the period of each isolated system. In this report, we investigated, using the hardware models, the needed power consumption to cause the acceleration phenomena. As a result, we found that the power consumption could be reduced through the coupling of the isolated systems, though the acceleration phenomena were observed.

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  • Simulation on New Guidance Scheme of the Guidance System for the Visually Impaired : Effect of Landmark Celebrity on Guidance

    KONISHI Takashi, MAEDA Yoshinobu, SUZUKI Fumihisa, TANO Eiichi, MAKINO Hideo

    12   59 - 62   2003.9

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  • Experiment and Evaluation of a GPS Mobile Phone and PDA in a Speech-Output Guidance System for the Visually Impaired

    HIGAKI Hiroyuki, MAKINO Hideo, WATANABE Reiji, TETSUMOTO Hideo, MAEDA Yoshinobu, ISHII Ikuo

    IEICE technical report. ME and bio cybernetics   103 ( 327 )   61 - 66   2003.9

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    A GPS (Global Positioning System) and GIS(Geographic Information System) based speech-output guidance system has been developed as the assistive technology for the visually impaired. In this report, to develop a practical speech-output guidance system for the visually impaired, we developed novel software which enables location data to be input by a visually impaired person. We also developed the speech-output data management system. Here a user is able to input location data and able to receive speech-based guidance using a GPS mobile phone or a PDA that has a GPS receiving unit. Moreover, the speech-output data management system enables input and output of data according to a user's coordinate position on a digital map. Such maps now cover the entire area of Japan. Using a GPS mobile phone, our experimental work suggests that a user can receive speech-output guidance within 15 seconds, automatically.

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    Other Link: http://search.jamas.or.jp/link/ui/2004071048

  • Speech Guidance System for the Visually Impaired using a GPS Cellular Phone including and Azimuth Sensor

    Higaki Hiroyuki, Makino Hideo, Maeda Yoshinobu, Watanabe Reiji, Ishi Ikuo

    Proceedings of the IEICE General Conference   2003   368 - 368   2003.3

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  • Acceleration phenomena of hardware models for Purkinje fiber cells

    MAEDA Yoshinobu, SAKAGUCHI Shinya, MAKINO Hideo, DOI Shinji

    Proceedings of the IEICE General Conference   2003   3 - 3   2003.3

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  • Consideration for individual identification from face-image and hand-image using multivariate analysis

    HAYASAKA Shuichi, MAEDA Yoshinobu, MAKINO Hideo, ISHII Ikuo

    IEICE technical report. ME and bio cybernetics   101 ( 533 )   67 - 74   2001.12

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    We addressed the basic research of individual identification using the face-image and the hand-image, which are taken from both the visible gain region(VGR)and the near infrared ray region(NIRR). First, we derived the features of the image from-second-order local auto correlation features. Second, we identified a given image using the several reference images from point of view of the multivariate analysis. We obtained the NIRR images by a CCD camera, an optical filter, and an incandescent lamp. We verified experimentally the individual identification from those Images of three persons, and, we checked that the IRR image is effective for individual identification.

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  • Two-cell Network Dynamics of Bursting Hardware Neuron Models

    MAEDA Yoshinobu, MAKINO Hideo

    15   47 - 50   2000.10

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  • Application of an invisible bar code to Augmented Reality : Object position detection and speech guidance method

    YAMAMOTO Satoshi, MAKINO Hideo, MAEDA Yoshinobu, HIRONO Mikihiko

    IEICE technical report. ME and bio cybernetics   100 ( 330 )   59 - 66   2000.9

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    An augmented reality is a technology that presents information by combining virtual objects in the real world. We have examined a method that recognizes some objects and presents their information to users. Concretely we have developed an object guidance system using a CCD camera and an invisible bar code, which one cannot recognize in normal circumstances. The object guidance system recognizes the invisible bar code. Detailed description of the object is provided through speech. We confirmed that at least three objects on the desk were exactly identified and that the detailed information about each object was described by speech. Then it took about 3.8 seconds to detect three barcodes, and about 7.8 seconds to decode each barcode. The invisibility of the barcode maintains the integrity of the object, whereas visible bar codes tend to dominate the design of objects. We expect that this system can be applied to not only augmented reality but also an assistive technology for the visually impaired.

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  • An Outdoor Guidance System using GPS for Visually Impaired People [II] : Guidance using FM-DGPS

    TANO Eiichi, MAKINO Hideo, MAEDA Yoshinobu, KITAMURA Yasuhiro, MARUYAMA Atsushi, IKARASHI Akira

    IEICE technical report. ME and bio cybernetics   100 ( 98 )   101 - 108   2000.5

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    We have improved the outdoor guidance system for visually impaired people using a FM-DGPS and our prototype portable unit. First, we had our system possess the following two functions. One was a telephony type, the other was a portable type. We regard the system, which the mobile station obtains the geographical data via a telephone circuit, as the telephony type. When the mobile station has both the GPS receiver and the geographical database, we regard it as the portable type. Second, while we walked around our campus, urban and rural areas, the measurement error of the FM-DGPS was about three meters on average and ten meters at most. Finally, we compared the radiobeacon-DGPS with the FM-DGPS in view of evaluating accuracy. Also, we verified that the DGPS, using our GPS receiver and the radiobeacon was useful for our Guidance System.

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    Other Link: http://search.jamas.or.jp/link/ui/2000260229

  • Consideration for bar code position detection using a neural network with mutual inhibitions : Application to work assistance for visually impaired

    HAYASAKA Shuichi, MAEDA Yoshinobu, MAKINO Hideo, YAMAMOTO Satoshi, SEKIYA Yasushi

    IEICE technical report. ME and bio cybernetics   100 ( 98 )   109 - 116   2000.5

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    We have developed an assistive system for the visually impaired to recognize functional parts of objects. The necessary information for the visually impaired is encoded in a two-dimensional (2D) code that put on the object. In our study the 2D code is "invisible" in the sense that it is hidden in the background design, though it is visible in the near infrared spectrum. Therefore, we cannot recognize it through our naked eyes. We extended the faculty of our system in this report so that the system could recognize successively the several 2D codes. To this end, we used an artificial neural network in which each neuron model is connected by means of mutual inhibitions. A static image (640×480 pixels) obtained by the CCD camera was given to the neural network composed of 357 Nagumo-Sato neuron models. The neural network was set so as to overspread the image. When the network parameters were regulated at appropriate values, the corresponding neurons to the location of 2D codes could generate randomly a bursting excitation their turns. A 2D code is 1.5×1.5cm in area. The distance from CCD camera to 2D code is 40 cm. When initial values of the neuron models were identical, we confirmed that our system could detect five 2D codes during forty seconds by using numerical simulation (Pentium II prcessor, 450MHz).

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    Other Link: http://search.jamas.or.jp/link/ui/2000267976

  • Analysis of Dynamics shown by a Hardware Neuron Model Using the Dynamical System Theory

    MAEDA Yoshinobu, SATO Shunsuke, MAKINO Hideo

    14   323 - 326   1999.10

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  • An Outdoor Guidance System using GPS for Visually Impaired People : Increased accuracy using FM-DGPS

    TANO Eiichi, MAKINO Hideo, MAEDA Yoshinobu, PARKES Donald Nicholson

    IEICE technical report. ME and bio cybernetics   99 ( 82 )   35 - 40   1999.5

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    A GPS provides information on location, using signals from Global Positioning System satellites. Elsewhere we have discussed an outdoor guidance system using GPS for visually impaired people. In our earlier reports the measurement error was over l00 meters, using a stand alone GPS receiver. Now measurement error can be reduced to 10 meters at most when using FM-DGPS and our prototype portable unit. Our system was composed of two stations. A visually impaired traveler with a GPS receiver formed one of the stations. A personal computer acted as the base station. The stations were linked by telephone enabling the visually impaired traveler to receive guidance information. Here we report on the use of a GPS receiver and palm-top computer by visually impaired people.

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  • A Method for Displaying High Definition Images in Distance Learning : The Tuition of Children in Hospital

    ABE Hirotaka, MAKINO Hideo, MAEDA Yoshinobu, ISHII Ikuo

    IEICE technical report. Education technology   98 ( 563 )   47 - 54   1999.1

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    When students have to study using distance learning procedures, for instance children who are in hospital;it may be difficult for them to receive 'CLEAR'images on their 'BLACKBOARDS'. In this paper, we present ways to display 'CLEAR', high definition images. The procedures used to achieve this objective are discussed. Specifically, the whole 'blackboard' is not used but is divided into several smaller images using a video camera. We then use the 'entropy of images' to select a template to reconstruct the final image using pattern matching. Our experiments suggested use of a 40×40 pixel template and high entropy, as optimal in a image(640×480 pixels). We conclude the paper by describing an application using a school for children with special needs.

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  • Twisted homoclinic orbit in reduced Hodgkin-Huxley equations

    FUKAI Hidekazu, MAEDA Yoshinobu, PAKDAMAN K., NOMURA Taishin, SATO Shunsuke

    IEICE technical report. Nonlinear problems   98 ( 45 )   49 - 56   1998.5

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    The various responses exhibited by the four-variable Hodgkin-Huxley equations when the input current is changed can all be reproduced by two variable reduced models. However, when the parameter representing the potassium reversal potential is also modified, dynamics, such as twisted homoclinic orbits appear that are inherently of dimension higher than two. In this work, we show that, in this case, it is still possible to reduce the HH equation to a three variable system. Our analysis suggests that global bifurcations such as twisted homoclinic bifurcation and period doubling can be preserved in the reduction process.

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  • On reduction of neuron models

    MAEDA Yoshinobu, PAKDAMAN K., NOMURA Taishin, DOI Shinji, SATO Shunsuke

    生体・生理工学シンポジウム論文集   12   81 - 84   1997.9

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  • Response characteristics of excitable cell models to bursting inputs.

    MAEDA YOSHINOBU, DOI SHINJI, NOMURA TAISHIN, SATO SHUNSUKE

    生体・生理工学シンポジウム論文集   11th   73-76 - 76   1996.11

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  • Reduction of the bursting neuron model and analysis of the dynamics.

    MAEDA YOSHINOBU, DOI SHINJI, NOMURA TAISHIN, SATO SHUNSUKE

    生体・生理工学シンポジウム論文集   10th   461-464 - 464   1995.11

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  • Nonlinear Dynamics of the Bursting Neuron Model

    MAEDA Yoshinobu, DOI Shinji, NOMURA Taishin, SATO Shunsuke

    IEICE technical report. ME and bio cybernetics   95 ( 84 )   85 - 92   1995.5

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    A bursting discharge is one of the most typical temporal behaviors of neurons. A bursting neuron repeats periodically or non-periodically two phases ; an active phase in which impulses are successively produced and a silent phase in which no impulse is produced at all. In this paper, nonlinear dynamics of spontaneous bursting discharges is investigated by means of a model of bursting discharges (a bursting neuron model) from a point of view of dynamical system theory.

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  • Reduction and phase space analysis of the Onchidium pacemaker neuron model

    Maeda Yoshinobu, Doi Shinji, Nomura Taishin, Sato Shunsuke

    IEICE technical report. ME and bio cybernetics   94 ( 80 )   25 - 32   1994.5

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    Hayashi et al.presented a Hodgkin-Huxley type neuron model with eight variables as the model of mollusk Onchidium pacemaker neurons which showed several oscillatory phenomena such as beating and periodic or chaotic bursting discharges.In order to study the dynamical behavior of the pacemaker neuron model,we derive a three- variables reduced model from the original neuron model using the reduction method proposed by Kepler et al..Then,using the nullcline in the three-dimensional phase space,structures of the periodic orbit corresponding to beating and bursting discharge are studied.

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  • Two-dimensional bifurcation diagram of Hodgkin-Huxley model

    Maeda Yoshinobu, Doi Shinji, Sato Shunsuke

    IEICE technical report. ME and bio cybernetics   MBE93 - 22   1993

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    Two-dimensional bifurcation diagram with respect to two parameters,namely,current pulse intervals and current pulse intensity normalized by threshold current,are investigated for the response sequences of Hodgkin-Huxley model driven by periodic pulse trains.Results are compared qualitatively with those of the electrophysiological experiment reported by Takahashi and others. Effects of the temperature parameter on the bifurcation diagram are also considered.

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  • The Formation of Transport Economics in Japan(In Honour of Professor Ken-ichi Masui)

    Maeda Yoshinobu

    Mita business review   26 ( 5 )   56 - 64   1983.12

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Presentations

  • 側抑制型電子回路ニューラルネットワークを用いたシュブルール錯視現象

    土門立志, 前田義信

    第20回電気学会東京支部新潟支所研究発表会  2011.11  電気学会

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    Venue:長岡  

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  • マルチエージェントシステムを用いた避難行動シミュレーションの試み

    荻原さなえ, 谷賢太朗, 前田義信

    電子情報通信学会信越支部大会  2011.10  電子情報通信学会

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    Venue:新潟  

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  • 日本雇用市場における新卒採用活動のモデル化

    堀口航平, 伊藤尚, 前田義信

    電子情報通信学会信越支部大会  2011.10  電子情報通信学会

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  • 人工学級モデルを用いた生徒間の対立回避行動の分析

    山岸奈央, 伊藤尚, 前田義信

    電子情報通信学会信越支部大会  2011.10  電子情報通信学会

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  • 日本雇用市場における新卒採用活動のモデル化の試み

    堀口航平, 伊藤尚, 前田義信

    電子情報通信学会ソサイエティ大会  2011.9  電子情報通信学会

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    Venue:札幌  

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  • 錯視現象を説明するアナログ回路型神経ネットワークの設計

    土門立志, 久保田真仁, 前田義信, 塚田章, 林豊彦, 飯島淳彦

    生体医工学シンポジウム  2011.9  生体医工学会

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    Venue:長野  

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  • 空間的なシミュレーションによる社会的ジレンマの基礎的性質に関する考察

    谷賢太朗, 前田義信, 林豊彦

    福祉情報工学研究会  2011.5  電子情報通信学会

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  • 人工学級モデルとフラット化するコミュニケーションの特性

    前田義信, 伊藤尚, 谷賢太朗, 佐藤輝空, 加藤浩介

    福祉情報工学研究会  2011.5  電子情報通信学会

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  • 優先的選択をするエージェントからなる人工学級ゲーム

    冨岡静佳, 佐藤輝空, 前田義信, 伊藤尚, 谷賢太朗, 加藤浩介

    福祉情報工学研究会  2011.1  電子情報通信学会

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    Venue:滋賀  

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  • ベイズ更新による人工学級シミュレーション

    佐藤輝空, 前田義信, 伊藤尚, 谷賢太朗, 林豊彦, 加藤浩介

    電子情報通信学会信越支部大会  2010.10  電子情報通信学会

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    Venue:長岡  

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  • 音声出力インタフェースを用いた娯楽ゲーム(まわし将棋)開発の試み

    村山尚紀, 谷賢太朗, 伊藤尚, 前田義信

    福祉情報工学研究会  2010.10  電子情報通信学会

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    Venue:幕張  

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  • 求心性刺激を含むCPGの電子回路モデル設計の試み

    久保田真仁, 金子怜史, 谷賢太朗, 伊藤尚, 前田義信

    電子情報通信学会信越支部大会  2010.10  電子情報通信学会

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  • MASを用いた援助行動を伴う金銭交換シミュレーションの基礎研究

    堀口航平, 伊藤尚, 谷賢太朗, 前田義信

    電子情報通信学会信越支部大会  2010.10  電子情報通信学会

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  • 二段型CPG電子回路モデルのPF層を除く簡約化について

    金子怜史, 久保田真仁, 前田義信, 林豊彦, 加納慎一郎, 塚田章

    生体医工学シンポジウム  2010.9  生体医工学学会

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    Venue:札幌  

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  • スモールワールドネットワークにおけるホジキン・ハクスレイ型振動子の加速現象

    木竜雄一郎, 小松弘輝, 前田義信, 伊藤尚, 谷賢太朗, 林豊彦

    生体医工学シンポジウム  2010.9  生体医工学会

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  • 視覚情報の有無によるゲームのユーザビリティの変化に関する検討

    谷賢太朗, 村山尚紀, 前田義信, 伊藤尚, 林豊彦, 渡辺哲也

    生活生命支援医療福祉工学系学会連合大会  2010.9  日本生活支援工学会

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    Venue:大阪  

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  • 弱視シミュレータを用いたボタンインタフェース操作

    高橋ひとみ, 前田義信, 伊藤尚, 谷賢太朗, 宮川道夫, 林豊彦

    生活生命支援医療福祉工学系学会連合大会  2010.9  日本生活支援工学会

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  • Noble方程式のスモールワールド結合系に関するシミュレーション

    小松弘輝, 木竜雄一郎, 前田義信, 林豊彦

    MEとバイオサイバネティクス研究会  2010.5  電子情報通信学会

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    Venue:富山  

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  • アフリカツメガエルの尾部消失における甲状腺ホルモン制御系モデルの改善

    佐々木章克, 井筒ゆみ, 前田義信, 林豊彦

    MEとバイオサイバネティクス研究会  2010.5  電子情報通信学会

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  • 相互抑制型電子回路ニューラルネットワークの簡略化

    金子怜史, 惣塚拓也, 前田義信, 林豊彦

    回路とシステム研究会  2010.3  電子情報通信学会

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    Venue:沖縄  

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  • 経路選択支援システムの改善とその評価

    前川拓也, 小林純一, 前田義信, 渡辺哲也, 林豊彦

    HCGシンポジウム  2009.12  電子情報通信学会

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    Venue:札幌  

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  • 車椅子利用者を考慮した避難行動シミュレーション

    山口直人, 谷賢太朗, 伊藤尚, 小西孝史, 前田義信, 林豊彦, 渡辺哲也

    第19回電気学会東京支部新潟支所研究会  2009.11  電気学会

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    Venue:新潟  

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  • 活動電位を再現する電子回路ニューロンモデル研究からの考察

    前田義信, 林豊彦, 加納慎一郎, 塚田章

    MEとバイオサイバネティクス研究会  2009.11  電子情報通信学会

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    Venue:仙台  

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  • 尾部消失に関わるアフリカツメガエル甲状腺ホルモン制御系のモデル化

    佐々木章克, 井筒ゆみ, 前田義信, 林豊彦

    第19回電気学会東京支部新潟支所研究会  2009.11  電気学会

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  • 電子回路ニューラルネットワークを用いた中枢パターン発生器のモデル設計

    惣塚拓也, 金子怜史, 前田義信, 林豊彦

    第19回電気学会東京支部新潟支所研究会  2009.11  電気学会

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  • 視覚障害者とボランティア学生の出会いの場

    前田義信

    第164回済生会新潟第二病院眼科勉強会  2009.10  済生会新潟第二病院眼科

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    Venue:済生会新潟第二病院眼科  

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  • 生徒エージェントを用いた人工学級シミュレーション

    前田義信

    「ソフトコンピューティングと最適化」研究部会,「数理モデルとその応用」研究部会  2009.10  日本オペレーションズ・リサーチ学会

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    Venue:福井工業大学  

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  • 4行動MASモデルによる人工学級シミュレーション

    佐藤輝空, 前田義信, 伊藤尚, 林豊彦, 渡辺哲也

    電子情報通信学会信越支部大会  2009.10  電子情報通信学会

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    Venue:長野  

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  • CPG-運動ニューロン系を再現する相互抑制型電子回路モデルの設計

    金子怜史, 惣塚拓也, 前田義信, 林豊彦

    電子情報通信学会信越支部大会  2009.10  電子情報通信学会

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    Venue:長野  

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  • 人工学級シミュレーションとそのシリアスゲーム化の試み

    前田義信

    オーガナイズドセッション「エンターテインメント技術がくらしをかえる」  2009.9  第7回生活支援工学系学会連合大会

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    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

    Venue:高知工科大学  

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  • インタフェースデバイスの最適ボタン数に関する考察 -アルファベット出現頻度とボタン配置への依存性-

    菊地瞳, 前田義信, 宮川道夫

    ヒューマンインタフェースシンポジウム  2009.9  ヒューマンインタフェース学会

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    Venue:東京  

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  • 心筋細胞の数理モデルが呈する加速現象のシミュレーション

    小松弘輝, 前田義信, 林豊彦, 渡辺哲也

    生体・生理工学シンポジウム  2009.9  計測自動制御学会

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    Venue:仙台  

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  • 経済指標を用いたマルチエージェント生産者モデルのダイナミクスの評価

    伊藤尚, 前田義信, 宮川道夫

    生活支援工学系学会連合大会  2009.9  日本生活支援工学会

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    Venue:高知  

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  • 占有領域の異なるエージェントを用いた避難行動シミュレーション

    山口直人, 谷賢太朗, 小西孝史, 前田義信

    生活支援工学系学会連合大会  2009.9  日本生活支援工学会

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    Venue:高知  

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  • 移動プランの形成を支援する音声ソフトウェア

    小林純一, 前川拓也, 前田義信, 渡辺哲也, 林豊彦

    生活支援工学系学会連合大会  2009.9  日本生活支援工学会

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    Venue:高知  

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  • 色彩調和の観点から見たメイクの印象操作効果

    山本啓太, 前田義信, 宮川道夫, 北村絵里子

    生体医工学シンポジウム  2009.9  生体医工学会

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    Venue:千葉  

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  • アフリカツメガエルの尾部消失に関する甲状腺ホルモン制御系のモデル化の試み

    佐々木章克, 井筒ゆみ, 前田義信, 林豊彦

    生体医工学シンポジウム  2009.9  生体医工学会

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    Venue:千葉  

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  • 頭部固定の有無がビデオ方式による視線位置計測に与える影響

    木竜雄一郎, 飯島淳彦, 川嵜圭祐, 宮川尚久, 前田義信, 長谷川功

    MEとバイオサイバネティクス研究会  2009.9  電子情報通信学会

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    Venue:新潟  

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  • マルチエージェント生産経済モデルのダイナミクスの評価

    伊藤尚, 前田義信, 林豊彦, 渡辺哲也

    福祉情報工学研究会  2009.7  電子情報通信学会

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    Venue:山梨  

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  • 新潟大学における視覚障害者のためのパソコン講習

    前田義信, 林豊彦, 堀潤一, 石渡宏基, 岩城護, 渡辺哲也, 山口俊光

    福祉情報工学研究会  2009.7  電子情報通信学会

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    Venue:山梨  

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  • 環境条件の変化が集団応報戦略による二次ジレンマ問題の解決にもたらす影響

    谷賢太朗, 前田義信

    福祉情報工学研究会  2009.5  電子情報通信学会

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    Venue:沖縄  

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  • ボタンインタフェースの操作モデル構築の試み

    前田義信, 宮川道夫, 小山望

    電子情報通信学会総合大会  2009.3  電子情報通信学会

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    Venue:愛媛  

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  • ボタンインタフェースの使いやすさに関する基礎実験

    前田義信, 宮川道夫, 小山望

    福祉情報工学研究会  2008.10  電子情報通信学会

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    Venue:所沢  

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  • 移動行動プランの自己決定を支援する視覚障害者用システムの開発

    前田義信, 河面勇太郎

    リハ工学カンファレンス  2008.8  日本リハビリテーション工学協会

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    Venue:新潟  

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  • 学級内友人形成の参加型エージェントゲーム

    前田義信

    電子情報通信学会総合大会  2008.3  電子情報通信学会

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    Venue:北九州  

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  • 視覚障がい者のためのパソコン講習と支援技術教育

    前田義信

    第141回済生会新潟第二病院眼科勉強会  2007.11  安藤伸朗

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    Venue:済生会新潟第二病院  

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  • Participation-type agent-based simulation of group formation and minority exclusion

    Yoshinobu Maeda, Miwako Nagasawa

    福祉情報工学研究会  2007.10  電子情報通信学会

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    Venue:大阪  

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  • 視覚障害シミュレータを用いた読書行為のワークロード評価

    前田義信, 宮川道夫

    ヒューマンインタフェースシンポジウム  2007.9  ヒューマンインタフェース学会

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    Venue:東京  

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  • 集団形成に関するマルチエージェントシミュレーション

    前田義信

    日本知能情報ファジィ学会中国・四国支部平成19年度第1回講演会  2007.5  日本知能情報ファジィ学会中国・四国支部

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:広島大学  

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  • 注視点追跡型拡大読書器の開発

    前田義信, 宮川道夫, 宮澤洋一, 小柳貴義

    医療・福祉分野におけるヒューマンインタフェース研究会  2006.9  第4回生活支援工学系学会連合大会

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    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

    Venue:東京理科大学  

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  • 視覚障害者の自己決定と外出プラン支援システムの開発

    前田義信, 宮地孝明, 宮川道夫

    日本生体医工学会専門別研究会「平成18年度医療・福祉分野におけるヒューマンインターフェース研究会」  2006.8  日本生体医工学会

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    Venue:青森  

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  • 適応型拡大読書器の制御を目的とした注視点の統計解析

    前田義信, 宮川道夫, 武田紗路, 田中正太郎

    日本生体医工学会専門別研究会「平成17年度第4回医療・福祉分野におけるヒューマンインタフェース研究会」  2006.3  日本生体医工学会

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    Venue:新潟  

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  • 注視点追跡機能を有する電子拡大読書器の検討

    前田義信, 小熊隆史, 石黒隆志, 宮川道夫, 玉木徹, 堀潤一

    ヒューマンインタフェースシンポジウム  2005.9  ヒューマンインタフェース学会

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    Venue:藤沢  

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  • 移動経路選択における経路の嗜好間相関の調査

    前田義信, 宮地孝明, 堀潤一, 宮川道夫

    日本エム・イー学会大会  2004.11  日本エム・イー学会

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    Venue:松山  

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  • 視覚障害者のための移動行動支援システム開発の試み

    前田義信, 小西孝史, 松橋貴之, 牧野秀夫, 宮川道夫

    オーガナイズドセッション「医療と福祉におけるヒューマンインタフェースを考える」  2004.5  第43回日本ME学会大会

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    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

    Venue:石川厚生年金会館  

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  • 視覚障害者のための移動行動支援システム開発の試み

    前田義信, 小西孝史, 松橋貴之, 牧野秀夫, 宮川道夫

    日本エム・イー学会大会  2004.5  日本エム・イー学会

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    Venue:金沢  

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  • 視覚障害者を対象としたパソコン初級講習会の実施-2次元表の1次元音声情報への変換問題-

    前田義信, 中村康雄, 林豊彦, 鈴木文久, 牧野秀夫, 関良介, 佐藤喜代美, 松永秀夫

    電子情報通信学会総合大会  2004.3  電子情報通信学会

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    Venue:東京  

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  • 非線形回路振動子の拡散結合系における加速効果

    前田義信, 牧野秀夫, 土居伸二

    第18回生体・生理工学シンポジウム  2003.10  計測自動制御学会

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    Venue:新潟  

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  • 非線形回路振動子の絶対不応期が加速振動へ及ぼす影響

    前田義信

    第2回情報科学技術フォーラム  2003.9  電子情報通信学会

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    Venue:札幌  

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  • 心臓プルキンエ発振型電子回路モデル結合系の加速現象

    前田義信, 坂口信也, 牧野秀夫, 土居伸二

    電子情報通信学会総合大会  2003.3  電子情報通信学会

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    Venue:仙台  

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  • 電子回路バーストニューロンモデルのカオス的振舞い

    前田義信, 牧野秀夫

    第12回電気学会東京支部新潟支所研究会  2002.11  電気学会

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    Venue:長岡  

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  • 電子回路を用いたバースト神経細胞モデルの結合系のダイナミクス

    前田義信, 牧野秀夫

    第15回生体・生理工学シンポジウム  2000.10  計測自動制御学会

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    Venue:名古屋  

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  • 力学系の手法を用いた神経細胞の電子回路モデルが示すダイナミクスの解析

    前田義信, 佐藤俊輔, 牧野秀夫

    第14回生体・生理工学シンポジウム  1999.10  計測自動制御学会

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    Venue:神戸  

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  • 拡張現実感を目的とした非可視型バーコードによる情報提示装置

    山本智志, 牧野秀夫, 中村英雄, 前田義信, ドナルド・パークス

    日本エム・イー学会大会  1999.4  日本エム・イー学会

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    Venue:仙台  

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  • 自律的バースト放電するハードウェア神経細胞モデル

    前田義信, 佐藤俊輔, 牧野秀夫

    日本エム・イー学会大会  1999.4  日本エム・イー学会

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    Venue:仙台  

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Awards

  • 電子情報通信学会 サブソサイエティ運営 貢献賞

    2013.9   電子情報通信学会   サブソサイエティ運営 貢献賞

    前田 義信

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  • 生体医工学シンポジウム2012 ベストリサーチアワード

    2012.9   日本生体医工学会  

    久保田真仁, 前田義信, 塚田章

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • 第6回ヒューマンコミュニケーション賞

    2009.3   電子情報通信学会  

    小西孝史, 前田義信, 田野英一, 牧野秀夫

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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  • 第5回インテリジェントコスモス奨励賞

    2006.5   インテリジェントコスモス学術振興財団  

    前田義信

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    Award type:Award from publisher, newspaper, foundation, etc.  Country:Japan

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Research Projects

  • 視覚探索時の注視点の動きに関するモデリング

    2018.4 - 2020.3

    (一財) 永井エヌ・エス知覚科学振興会 研究開発費助成 

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    Authorship:Principal investigator 

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  • サッケード実時間予測と高精度頭部位置・姿勢計測による中心暗点シミュレータの開発

    2015.4 - 2017.3

    日本学術振興会  科学研究費助成事業  挑戦的萌芽研究

    塚田章, 秋田純一, 前田義信

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid)  Grant type:Competitive

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  • マルチプレイ型人工学級ゲームシステムの開発

    2015.4 - 2017.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    前田義信

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    Authorship:Principal investigator  Grant type:Competitive

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  • ヒトの視線の動き計測とそのモデル化に関する研究

    2013.4 - 2014.3

    民間財団等  エヌ・エス知覚科学振興会 研究開発費助成 

    前田 義信

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\500000 ( Direct Cost: \500000 )

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  • 視覚系の動き検出処理に学ぶ各画素が連続的な時間軸をもつ実像処理

    2012.4 - 2014.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

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    Grant type:Competitive

    Grant amount:\900000 ( Direct Cost: \630000 、 Indirect Cost:\270000 )

    通常の動画像処理では時間間隔において順次撮像された画像列に対して処理が行われているのに対し,ヒト視覚系では受光細胞ごとに信号を時間連続的に扱うという点が大きく異なっている.本研究では,視覚系における優れた動き検出能力の要因の1つとしてこの点に着目し,従来用いられていたフレーム内の空間的な特徴やフレーム間の相関を,画素ごとの時空間的な特徴へと拡張し,実在する像を時間連続的に処理する「実像処理」と呼ぶ従来の画像処理から拡張された手法を構築する.また独立な時間軸で出に変化を示す視細胞・視覚系とそれを模擬する視覚情報処理モデルに基づく「実像処理」システムの実現方法を探る.

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  • 人工学級ゲームを用いた自閉症傾向の推定

    2011.4 - 2013.3

    科学研究費助成事業  萌芽研究

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    Grant type:Competitive

    Grant amount:\1300000 ( Direct Cost: \910000 、 Indirect Cost:\390000 )

    学校におけるいじめ現象に対して,生態学的かつ工学的観点からエージェントベースでモデル化を試み,シミュレーションソフトウェアとして実装する.
    エージェントの一部を実際のヒトが操作するプレイヤーとし,プレイヤーの行動を追跡することで,いじめ加害者,いじめ被害者になりやすい特性を抽出する.
    上記の特性を自閉症スペクトラム指数と比較検討し,診断テストと並行して実施できるような“診断ゲーム(シリアスゲーム)”を提案する.

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  • 人工学級モデルを用いたフラット化交友関係の特性分析

    2011.4 - 2012.3

    民間財団等  内田エネルギー科学振興財団試験研究助成 

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    Grant type:Competitive

    Grant amount:\380000 ( Direct Cost: \380000 )

    生徒エージェントを用いたマルチエージェントシミュレーションによる学校いじめ問題の構造分析

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  • 友人ネットワーク形成といじめに関するシミュレーション

    2010.4 - 2011.3

    民間財団等  高橋産業経済研究財団研究助成 

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    Grant type:Competitive

    Grant amount:\1000000 ( Direct Cost: \920000 、 Indirect Cost:\80000 )

    マルチエージェントシミュレーションを用いた人工学級モデルの構築

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  • いじめ構造理解のためのプレイヤー参加型シミュレーション

    2009.4 - 2011.3

    日本学術振興会  科学研究費助成事業  若手研究(B)

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    Grant type:Competitive

    Grant amount:\1600000 ( Direct Cost: \1120000 、 Indirect Cost:\480000 )

    中高生がいじめ問題を体験的に学び,その解決策を自ら探ることを支援するシミュレーションソフトウェアを開発する.具体的には,自分の趣味と同じ趣味を見出す相手と友人関係を形成するエージェント(プログラム)に対して,プレイヤーであるヒトが同様に相互作用することのできる体験ゲームの開発である.そこで,1)ヒトと同様の相互作用をするエージェントのプログラミング,2)ヒト-エージェント間のハイブリッド相互作用を可能とするネットワーク構築,の2点を完成させることが目的となる.

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  • CPG回路による生体型ロボット制御のための基礎研究

    2009.4 - 2010.3

    内田エネルギー科学振興財団  内田エネルギー科学振興財団試験研究助成 

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    Grant type:Competitive

    Grant amount:\350000 ( Direct Cost: \350000 )

    ニューロンの電子回路モデル,シナプスの電子回路モデルを用いて伸筋,屈筋を交互に制御するCPG回路を設計する.

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  • 視覚障害者の外出に対する主体性を支援するシステムの開発とその評価

    2005.10 - 2006.9

    民間財団等  三菱財団社会福祉事業並びに研究助成 

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    Grant type:Competitive

    Grant amount:\800000 ( Direct Cost: \800000 )

    ガーリングの地理学分野における移動行動モデルをもとに,視覚障害者の移動行動プランの形成を支援するシステム開発を,意思決定の数理モデルであるAHPと地理情報システムGISを組み合わせて開発した.

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  • 視線分析による弱視者向け読図支援システムの開発と評価

    2005.4 - 2007.3

    日本学術振興会  科学研究費助成事業  若手研究(B)

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    Grant type:Competitive

    Grant amount:\3500000 ( Direct Cost: \3500000 )

    ヒトの略地図の読図メカニズムを調査し,略地図作成支援システムの開発を試みた.

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  • 低消費エネルギーで駆動可能な振動加速回路の分析

    2005.4 - 2006.3

    民間財団等  内田エネルギー科学振興財団試験研究助成 

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    Grant type:Competitive

    Grant amount:\500000 ( Direct Cost: \500000 )

    心臓の刺激伝導系を構成する細胞群はペースメーカ細胞であり,これら振動数は互いに似ているものの個々には異なっている.これらが拡散結合されたとき,全体で同期する振動数が個々の細胞の振動数よりも大きくなる加速現象を電子回路で再現し,なおかつ加速現象を起こすのにより電力を消費するケースと逆に電力をより消費しないケースがあることを確かめた.電力(単位時間あたりの消費エネルギー)を消費しないケースでの活動電位波形は実際の心筋細胞と同様のデューティー比を示すことを明らかにした.

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  • マルチエージェントシミュレーションの学校いじめ問題への応用

    2004.4 - 2005.3

    民間財団等  科学技術融合振興財団補助金 

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    Grant type:Competitive

    Grant amount:\220000 ( Direct Cost: \220000 )

    学校いじめ問題はその質的な様相を変化させ,誰がいじめる者,いじめられる者になるか,その生態学的布置が環境要因や個人要因によって変化する時代を迎えている.いじめを創発させる構造を明らかにするため,マルチエージェントシステムを用いて人工学級を構築し,個人間の相互作用が学級全体にどのような影響を及ぼすかを調べた.その結果,環境に用意された価値観の総数が多すぎても少なすぎてもいじめられる者は1割程度に抑えられ,適度な価値観が与えられた環境でいじめられる者が多数出現する構造を明らかにした.

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  • 低消費加速同期振動を示す非線形回路振動子の拡散結合系

    2003.12

    民間財団等  中部電力基礎技術研究所出版助成 

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    Grant type:Competitive

    Grant amount:\100000 ( Direct Cost: \100000 )

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  • 視覚障害者用移動行動プラン支援システムの開発

    2003.4 - 2005.3

    日本学術振興会  科学研究費助成事業  若手研究(B)

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    Grant type:Competitive

    Grant amount:\1900000 ( Direct Cost: \1900000 )

    視覚障害者の移動行動プラン(具体的には自らの嗜好を満たす経路選択)を支援するシステム開発を試みた.

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  • 電子回路ニューロンモデルを用いた結合系の加速現象

    2002.10 - 2003.3

    民間財団等  山口育英奨学会学術研究助成 

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    Grant type:Competitive

    Grant amount:\400000 ( Direct Cost: \400000 )

    神経細胞や心筋細胞など,生体内で情報伝達・処理系を構成する細胞群が相互結合を通して振動数を増加させる加速現象の様子を電子回路モデルで再現し調査した.その結果,活動電位の絶対不応期の長短で加速効果が発現したり消滅したりすることを確かめた.主に,神経細胞では絶対不応期が短く複雑な情報処理を行うことが可能であるが,加速現象は生じない.一方で心筋細胞では絶対不応期が長く複雑な情報処理は行えないが加速現象は生じ得ることを電子回路モデルで確かめた.

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  • 痴呆性徘徊老人の探索に影響を与える外部因子の統計的調査

    2002.6 - 2003.3

    民間財団等  新潟工学振興会試験研究助成 

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    Grant type:Competitive

    Grant amount:\400000 ( Direct Cost: \400000 )

    GPSとGISを用いて,徘徊老人の探索に影響を与える外部因子を抽出し,共分散構造分析モデルを構築した.

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  • 神経インパルス系列の生成と制御機構の非線形力学系モデルによる研究

    1995.4 - 1998.3

    科学研究費助成事業  特別研究員推奨費

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    Grant type:Competitive

    Grant amount:\2600000 ( Direct Cost: \2600000 )

    神経系で観察されるバースト放電の力学的な生成と制御構造を明らかにした.

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Teaching Experience

  • 人間支援科学特別講義II

    2022
    Institution name:新潟大学

  • バイオメカニクス

    2022
    Institution name:新潟大学

  • 自然科学総論III

    2022
    Institution name:新潟大学

  • 機械システム論

    2021
    Institution name:新潟大学

  • 卒業研究II

    2020
    Institution name:新潟大学

  • 卒業研究I

    2020
    Institution name:新潟大学

  • 研究課題調査I

    2020
    Institution name:新潟大学

  • 研究課題調査II

    2020
    Institution name:新潟大学

  • 卒業研修II

    2020
    Institution name:新潟大学

  • 情報セキュリティ概論

    2020
    -
    2021
    Institution name:新潟大学

  • 工学リテラシー入門(融合領域分野)

    2020
    -
    2021
    Institution name:新潟大学

  • コンピュータアーキテクチャ

    2020
    Institution name:新潟大学

  • 卒業研修I

    2019
    Institution name:新潟大学

  • 人間支援感性科学実験III

    2019
    Institution name:新潟大学

  • 人間支援感性科学実験IV

    2019
    Institution name:新潟大学

  • 人間支援感性科学実験II

    2018
    Institution name:新潟大学

  • 人間支援感性科学実験I

    2018
    Institution name:新潟大学

  • 福祉情報工学

    2018
    Institution name:新潟大学

  • 総合工学概論

    2017
    Institution name:新潟大学

  • 人間支援感性科学概論

    2017
    Institution name:新潟大学

  • コンピュータ基礎

    2017
    Institution name:新潟大学

  • リメディアル演習

    2017
    Institution name:新潟大学

  • 卒業研修

    2016
    -
    2019
    Institution name:新潟大学

  • 卒業研究

    2016
    -
    2018
    Institution name:新潟大学

  • 人間支援科学セミナーⅡ(情報)

    2013
    -
    2015
    Institution name:新潟大学

  • 人間支援科学研究発表(外部発表)

    2013
    -
    2015
    Institution name:新潟大学

  • 人間支援科学特定研究Ⅱ(情報)

    2013
    -
    2015
    Institution name:新潟大学

  • 人間支援科学研究発表演習(中間発表)

    2013
    -
    2015
    Institution name:新潟大学

  • 人間支援科学文献詳読Ⅱ(情報)

    2013
    -
    2015
    Institution name:新潟大学

  • 人間支援科学セミナーⅠ(情報)

    2013
    -
    2015
    Institution name:新潟大学

  • 人間支援科学文献詳読Ⅰ(情報)

    2013
    -
    2015
    Institution name:新潟大学

  • 人間支援科学特定研究Ⅰ(情報)

    2013
    -
    2015
    Institution name:新潟大学

  • システム工学

    2013
    Institution name:新潟大学

  • 論文輪講

    2011
    -
    2020
    Institution name:新潟大学

  • 信号処理・制御工学演習

    2011
    -
    2020
    Institution name:新潟大学

  • 数値計算実習

    2011
    Institution name:新潟大学

  • 自然科学総論Ⅲ

    2010
    -
    2016
    Institution name:新潟大学

  • 福祉情報技術実習

    2010
    -
    2014
    Institution name:新潟大学

  • 数値計算

    2010
    Institution name:新潟大学

  • プログラミング基礎演習

    2010
    Institution name:新潟大学

  • 電気数理II

    2009
    Institution name:新潟大学

  • 数理応用演習II

    2009
    -
    2020
    Institution name:新潟大学

  • 数理基礎演習Ⅰ

    2009
    -
    2016
    Institution name:新潟大学

  • 工学リテラシー入門(福祉人間工学科)

    2009
    -
    2016
    Institution name:新潟大学

  • 自然科学総論Ⅵ

    2009
    Institution name:新潟大学

  • GISリテラシー入門

    2009
    Institution name:新潟大学

  • 支援システム特論

    2008
    Institution name:新潟大学

  • 福祉シミュレーション

    2008
    Institution name:新潟大学

  • 福祉人間工学実験I

    2008
    -
    2010
    Institution name:新潟大学

  • スタディスキルズ(福祉人間工学)

    2008
    Institution name:新潟大学

  • 電気回路演習

    2008
    Institution name:新潟大学

  • 数理基礎演習Ⅱ

    2008
    Institution name:新潟大学

  • 制御工学

    2007
    Institution name:新潟大学

  • 福祉情報技術入門

    2007
    -
    2016
    Institution name:新潟大学

  • 高福祉社会を支える「生活支援工学」入門

    2007
    -
    2011
    Institution name:新潟大学

  • 電気回路I

    2007
    -
    2008
    Institution name:新潟大学

  • 支援機器工学

    2007
    Institution name:新潟大学

  • ユニバーサルデザイン特論

    2007
    Institution name:新潟大学

  • 電気回路演習I

    2007
    Institution name:新潟大学

  • 生体機能特論

    2007
    Institution name:新潟大学

  • 福祉機器特論

    2007
    Institution name:新潟大学

  • 福祉人間工学実験II

    2007
    Institution name:新潟大学

▶ display all