Tokushima University / Educator and Researcher Directory --- Iida, Hitoshi

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Tokushima University ⟩ Technical Support Department ⟩ 常三島技術部門 ⟩ ものづくりグループ ⟩

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Research

Field of Study

Subject of Study

Book / Paper

Academic Paper (Judged Full Paper):

1.	Hideji TANAKA, Mima Takuto, Masaki Takeuchi and Hitoshi Iida : Amplitude Modulated multiplexed flow analysis, Talanta, Vol.77, No.2, 576-580, 2008. (Keyword) Flow Analysis (Link to Publication Site) ● Publication site (DOI): 10.1016/j.talanta.2008.03.016 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.talanta.2008.03.016 (DOI: 10.1016/j.talanta.2008.03.016)
2.	Kunichika Tsumoto, Tetsuya Yoshinaga, Hitoshi Iida, Hiroshi Kawakami and Kazuyuki Aihara : Bifurcations in a mathematical model for circadian oscillations of clock genes, Journal of Theoretical Biology, Vol.239, No.1, 101-122, 2006. (Summary) Circadian oscillations with a period of about 24h are observed in nearly all living organisms as conspicuous biological rhythms. In this paper, we investigate various kinds of bifurcation phenomena produced in a circadian oscillator model of Drosophila. In Drosophila, it is known that circadian oscillations in the levels of two proteins, PER and TIM, result from the negative feedback exerted by a PER-TIM complex on the expression of the per and tim genes that code for the two proteins. For studying circadian oscillations of proteins in Drosophila, a mathematical model has been proposed. The model cannot only account for regular circadian oscillations in environmental conditions such as constant darkness, but also give rise to more complex oscillatory phenomena including chaos and birhythmicity. By calculating bifurcations using Kawakami's method, we obtain detailed bifurcation diagrams related to stable and unstable invariant sets, and identify parameter regions in which the model generates complex oscillations as well as regular circadian oscillations. Moreover, we study bifurcations observed in the model incorporating the effect on a light-dark (LD) cycle and show that the waveform of the periodic variation in the light-induced parameter has a marked influence on the global bifurcation structure or the type of dynamic behavior resulting from the forcing term of the circadian oscillator by the LD cycles. (Keyword) Animals / Biological Clocks / Circadian Rhythm / Drosophila / Gene Expression Regulation / Genes, Insect / Models, Genetic (Link to Publication Site) ● Publication site (DOI): 10.1016/j.jtbi.2005.07.017 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 16143345 ● Search Scopus @ Elsevier (PMID): 16143345 ● Search Scopus @ Elsevier (DOI): 10.1016/j.jtbi.2005.07.017 (DOI: 10.1016/j.jtbi.2005.07.017, PubMed: 16143345)

Academic Paper (Unrefereed Paper):

1.	Hitoshi Iida and Masaki Hashizume : An IC Card Reader for Recording Attendance with Student ID Cards, Journal of University Education Research, No.6, 70-74, 2009. (Keyword) 学生証 / RFID / ISO-14443 / Type-A / MIFARE / student ID card (Tokushima University Institutional Repository) ● Metadata: 82692 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1050865122808162304 (Tokushima University Institutional Repository: 82692, CiNii: 1050865122808162304)

Proceeding of International Conference:

1.	Hideji TANAKA, Takuto Mima, Hitoshi Iida and Masaki Takeuchi : Application of Multiplex Controlled Flow Ratiometry for the Simultaneous Determination of Ferrous and Ferric Ions, International Symposium on Flow-Based Analysis Vll, Chiang Mai, Dec. 2007. (Keyword) Flow analysis
2.	Kunichika Tsumoto, Tetsuya Yoshinaga, Hitoshi Iida, Hiroshi Kawakami and Kazuyuki Aihara : Bifurcation Analyses in a Circadian Oscillator Model of Clock Genes, Abstract book of International Workshop on Gene-Protein Dynamics of Circadian Clocks, 89-130, Tokyo, Sep. 2005.
3.	Tetsuya Yoshinaga, Kunichika Tsumoto, Hitoshi Iida and Hiroshi Kawakami : Bifurcation in a circadian oscillator model, Abstracts of International Symposium on Dynamical Systems Theory and Its Applications to Biology and Environmental Sciences, 167, Shizuoka, Mar. 2004.

Proceeding of Domestic Conference:

1.	Yoshiaki Akaishi, Hitoshi Iida, Ken'ichi Fujimoto and Tetsuya Yoshinaga : Circuit Implementation of Block Continuous-Time Reconstruction System for Computed Tomography, Proceedings of the 26th Workshop on Circuits and Systems, 293-298, Jul. 2013.
2.	Hideji TANAKA, Takuto Mima, Hitoshi Iida and Masaki Takeuchi : 多重制御流量比法のFe(II)およびFe(III)同時定量への応用, 第69回分析化学討論会, May 2008. (Keyword) フロー分析
3.	Tetsuya Yoshinaga, Hitoshi Iida, Kunichika Tsumoto and Hiroshi Kawakami : Analysis of a circadian oscillator model based on clock gene rhythms, 電気学会電子·情報·システム部門大会論文集, 114-118, Sep. 2005.
4.	Tetsuya Yoshinaga, Kunichika Tsumoto, Hitoshi Iida and Hiroshi Kawakami : サーカディアンリズムの結合振動子モデルと時計遺伝子モデルの分岐解析, Transactions of the Japanese Society for Medical and Biological Engineering, Vol.42, No.2, 178, Nov. 2004.
5.	Hitoshi Iida, Tetsuya Yoshinaga and Hiroshi Kawakami : サーカディアン振動子モデルにみられる矩形波外力への同期化現象, 電子情報通信学会総合大会講演論文集, A-2-18, Mar. 2004.
6.	Hitoshi Iida, Hiroshi Kawakami, Tomohiro Kubo and Tetsuya Yoshinaga : 周期的矩形波列を注入した睡眠覚醒振動子モデルの分岐解析, Journal of Shikoku-Section Joint Convention of the Institutes of Electrical and Related Engineers, Oct. 2003.

Et cetera, Workshop:

1.	Ken'ichi Fujimoto, Yoshiaki Akaishi, Hitoshi Iida and Tetsuya Yoshinaga : Circuit Design and Implementation of Block Continuous-Time Image Reconstruction System for Computed Tomography, The Papers of Technical Meeting, IEE JAPAN, Vol.ECT-13, 69-74, Nov. 2013. (Summary) We previously proposed a block continuous-time image-reconstruction system (block CIR system) that is described by switched ordinary differential equations. In this report, we present the design and implementation of the block CIR system to an electronic circuit. We also demonstrated that the block CIR circuit implemented to solve a preliminary CT problem worked well. (Keyword) CT image reconstruction / Optimization problem / Switched continuous-time dynamical system / Mixed analog-digital circuit
2.	Hitoshi Iida, Tetsuya Yoshinaga and Hiroshi Kawakami : Analysis on sets of equal phase differences for synchronized rhythms in a circadian oscillator model, IEICE Technical Report, Vol.NLP2004-89, 5-8, Jan. 2005.
3.	Hitoshi Iida, Tetsuya Yoshinaga and Hiroshi Kawakami : Bifurcations in a circadian oscillator model with periodic force, IEICE Technical Report, Vol.104, No.179, 33-36, Jul. 2004.