研究キーワード: 非線形動力学, 同期現象, 振動現象

Employment

2017年4月〜現在	海洋研究開発機構 主任研究員
2007年4月〜2017年3月	海洋研究開発機構 研究員

Education

2004年4月〜2007年3月	京都大学大学院 理学研究科 博士後期課程 物理学・宇宙物理学専攻
2002年4月〜2004年3月	京都大学大学院 理学研究科 博士前期課程 物理学・宇宙物理学専攻
1998年4月〜2002年3月	京都大学 理学部

Grants

2024年4月〜2028年3月	日本学術振興会 科学研究費 基盤研究(C) 24K06910 (代表者)
2020年4月〜2024年3月	日本学術振興会 科学研究費 基盤研究(C) 20K03797 (代表者)
2018年4月〜2022年3月	日本学術振興会 科学研究費 基盤研究(B) 18H03205 (分担者)
2017年4月〜2021年3月	日本学術振興会 科学研究費 基盤研究(B) 17H03279 (分担者)
2016年4月〜2020年3月	日本学術振興会 科学研究費 若手研究(B) 16K17769 (代表者)
2013年4月〜2016年3月	日本学術振興会 科学研究費 若手研究(B) 25800222 (代表者)

Awards

2016年3月	日本物理学会 第10回(2016年)若手奨励賞
2015年4月	海洋研究開発機構 平成26年度業績表彰 研究開発功績賞

振動対流の同期現象に対する位相記述によるアプローチ

結合させた2つの振動対流の間の位相同期現象が, 大気大循環の模型実験系である回転水槽実験系において観察されている. この様な振動対流の同期現象に対して位相記述法によりアプローチし, 振動対流の同期現象に対する統一的な理解を目指している.

振動対流(リミット・サイクル解)の温度場(T)と位相感受性(Z)のスナップショット. 位相感受性は各空間点に加えられた弱い摂動に対する振動対流の位相応答を定量化する. [Kawamura and Nakao, Chaos 23, 043129 (2013); Phys. Rev. E 89, 012912 (2014).]

空間並進自由度を持つ振動対流(リミット・トーラス解)の温度場(T)と2つの位相感受性(Zs, Zt)のスナップショット. 2つの位相感受性は各空間点に加えられた弱い摂動に対する振動対流の空間的・時間的な位相応答を定量化する. [Kawamura and Nakao, Physica D 295-296, 11-29 (2015).] [Kawamura, Phys. Rev. Research 1, 033130 (2019).] [Twitter, Phase reduction of limit-torus.]

鞭毛の同期現象に対する位相記述によるアプローチ

低レイノルズ数領域において流体力学的に相互作用する隣接した一対の鞭毛は同相同期することが実験により観察されている. この様な鞭毛の同期現象に対して位相記述法によりアプローチし, 鞭毛の同期現象に対する統一的な理解を目指している.

鞭毛の振動運動(リミット・サイクル解)の波形(h)と位相感受性(Z)のスナップショット. 位相感受性は各点に加えられた弱い摂動に対する鞭毛の位相応答を定量化する. [Kawamura and Tsubaki, Phys. Rev. E 97, 022212 (2018).] [Kawamura, Results Phys. 25, 104261 (2021).]

カルマン渦列の同期現象に対する位相記述によるアプローチ

カルマン渦列の同期現象に対して位相記述法によりアプローチし, カルマン渦列の同期現象に対する統一的な理解を目指している.

円柱まわりのカルマン渦列に対する位相記述によるアプローチの概略図. 揚力係数とその時間微分の平面における位相の定義, 並びに, ある位相における流れ場(u, v)の渦度(ω)と位相感受関数(Zu, Zv)のスナップショット. 位相感受関数は各点に加えられた弱い摂動に対する流れの位相応答を定量化する. [Kawamura, Godavarthi, and Taira, Phys. Rev. Fluids 7, 104401 (2022).] [Godavarthi, Kawamura, and Taira, J. Fluid Mech. 976, R1 (2023).]

Original Publications (Peer-Reviewed)

• Vedasri Godavarthi, Yoji Kawamura, Kunihiko Taira, Optimal waveform for fast synchronization of airfoil wakes, Journal of Fluid Mechanics, 976, 1-12, R1, (2023), doi:10.1017/jfm.2023.929
• Sebastian Baum, Patrick Stengel, Natsue Abe, Javier F. Acevedo, Gabriela R. Araujo, Yoshihiro Asahara, Frank Avignone, Levente Balogh, Laura Baudis, Yilda Boukhtouchen, Joseph Bramante, Pieter Alexander Breur, Lorenzo Caccianiga, Francesco Capozzi, Juan I. Collar, Reza Ebadi, Thomas Edwards, Klaus Eitel, Alexey Elykov, Rodney C. Ewing, Katherine Freese, Audrey Fung, Claudio Galelli, Ulrich A. Glasmacher, Arianna Gleason, Noriko Hasebe, Shigenobu Hirose, Shunsaku Horiuchi, Yasushi Hoshino, Patrick Huber, Yuki Ido, Yohei Igami, Norito Ishikawa, Yoshitaka Itow, Takashi Kamiyama, Takenori Kato, Bradley J. Kavanagh, Yoji Kawamura, Shingo Kazama, Christopher J. Kenney, Ben Kilminster, Yui Kouketsu, Yukiko Kozaka, Noah A. Kurinsky, Matthew Leybourne, Thalles Lucas, William F. McDonough, Mason C. Marshall, Jose Maria Mateos, Anubhav Mathur, Katsuyoshi Michibayashi, Sharlotte Mkhonto, Kohta Murase, Tatsuhiro Naka, Kenji Oguni, Surjeet Rajendran, Hitoshi Sakane, Paola Sala, Kate Scholberg, Ingrida Semenec, Takuya Shiraishi, Joshua Spitz, Kai Sun, Katsuhiko Suzuki, Erwin H. Tanin, Aaron Vincent, Nikita Vladimirov, Ronald L. Walsworth, Hiroko Watanabe, Mineral detection of neutrinos and dark Matter. A whitepaper, Physics of the Dark Universe, 41, 1-53, 101245, (2023), doi:10.1016/j.dark.2023.101245
• Takahiro Arai, Yoji Kawamura, Toshio Aoyagi, Extracting phase coupling functions between collectively oscillating networks from time-series data, Journal of the Physical Society of Japan, 91, 12, 1-14, 124001, (2022), doi:10.7566/JPSJ.91.124001
• Yoji Kawamura, Vedasri Godavarthi, Kunihiko Taira, Adjoint-based phase reduction analysis of incompressible periodic flows, Physical Review Fluids, 7, 10, 1-21, 104401, (2022), doi:10.1103/PhysRevFluids.7.104401
• Yoji Kawamura, Factors determining the relaxation time for elastohydrodynamic synchronization of adjacent beating flagella, Results in Physics, 25, 1-6, 104261, (2021), doi:10.1016/j.rinp.2021.104261
• Yoji Kawamura, Stable plane waves in nonlocally coupled phase oscillators, AIP Advances, 11, 1, 1-16, 015304, (2021), doi:10.1063/5.0035637
• Yoji Kawamura, Phase reduction of limit-torus solutions to partial differential algebraic equations, Physical Review Research, 1, 3, 1-23, 033130, (2019), doi:10.1103/PhysRevResearch.1.033130
• Michael Sebek, Yoji Kawamura, Ashley M. Nott, Istvan Z. Kiss, Anti-phase collective synchronization with intrinsic in-phase coupling of two groups of electrochemical oscillators, Philosophical Transactions of the Royal Society A, 377, 2160, 1-15, 20190095, (2019), doi:10.1098/rsta.2019.0095
• Hiroya Nakao, Sho Yasui, Masashi Ota, Kensuke Arai, Yoji Kawamura, Phase reduction and synchronization of a network of coupled dynamical elements exhibiting collective oscillations, Chaos, 28, 4, 1-10, 045103, (2018), doi:10.1063/1.5009669
• Yoji Kawamura, Remi Tsubaki, Phase reduction approach to elastohydrodynamic synchronization of beating flagella, Physical Review E, 97, 2, 1-10, 022212, (2018), doi:10.1103/PhysRevE.97.022212
• Yoji Kawamura, Sho Shirasaka, Tatsuo Yanagita, Hiroya Nakao, Optimizing mutual synchronization of rhythmic spatiotemporal patterns in reaction-diffusion systems, Physical Review E, 96, 1, 1-12, 012224, (2017), doi:10.1103/PhysRevE.96.012224
• Sho Shirasaka, Nobuhiro Watanabe, Yoji Kawamura, Hiroya Nakao, Optimizing stability of mutual synchronization between a pair of limit-cycle oscillators with weak cross coupling, Physical Review E, 96, 1, 1-12, 012223, (2017), doi:10.1103/PhysRevE.96.012223
• Yoji Kawamura, Collective phase reduction of globally coupled noisy dynamical elements, Physical Review E, 95, 3, 1-19, 032225, (2017), doi:10.1103/PhysRevE.95.032225
• Yoji Kawamura, Hiroya Nakao, Optimization of noise-induced synchronization of oscillator networks, Physical Review E, 94, 3, 1-14, 032201, (2016), doi:10.1103/PhysRevE.94.032201
• Yoji Kawamura, Hiroya Nakao, Phase description of oscillatory convection with a spatially translational mode, Physica D, 295-296, 11-29, (2015), doi:10.1016/j.physd.2014.12.007
• Hiroya Nakao, Tatsuo Yanagita, Yoji Kawamura, Phase-reduction approach to synchronization of spatiotemporal rhythms in reaction-diffusion systems, Physical Review X, 4, 2, 1-23, 021032, (2014), doi:10.1103/PhysRevX.4.021032
• Yoji Kawamura, Phase synchronization between collective rhythms of fully locked oscillator groups, Scientific Reports, 4, 1-7, 4832, (2014), doi:10.1038/srep04832
• Yoji Kawamura, Collective phase dynamics of globally coupled oscillators: Noise-induced anti-phase synchronization, Physica D, 270, 20-29, (2014), doi:10.1016/j.physd.2013.12.004
• Yoji Kawamura, From the Kuramoto-Sakaguchi model to the Kuramoto-Sivashinsky equation, Physical Review E, 89, 1, 1-5, 010901(R), (2014), doi:10.1103/PhysRevE.89.010901
• Nozomi Sugiura, Takane Hori, Yoji Kawamura, Synchronization of coupled stick-slip oscillators, Nonlinear Processes in Geophysics, 21, 1, 251-267, (2014), doi:10.5194/npg-21-251-2014
• Yoji Kawamura, Hiroya Nakao, Noise-induced synchronization of oscillatory convection and its optimization, Physical Review E, 89, 1, 1-13, 012912, (2014), doi:10.1103/PhysRevE.89.012912
• Yoji Kawamura, Hiroya Nakao, Collective phase description of oscillatory convection, Chaos, 23, 4, 1-11, 043129, (2013), doi:10.1063/1.4837775
• Hiroya Nakao, Tatsuo Yanagita, Yoji Kawamura, Phase description of stable limit-cycle solutions in reaction-diffusion systems, Procedia IUTAM, 5, 227-233, (2012), doi:10.1016/j.piutam.2012.06.030
• Hiroshi Kori, Yoji Kawamura, Naoki Masuda, Structure of cell networks critically determines oscillation regularity, Journal of Theoretical Biology, 297, 61-72, (2012), doi:10.1016/j.jtbi.2011.12.007
• Yoji Kawamura, Hiroya Nakao, Yoshiki Kuramoto, Collective phase description of globally coupled excitable elements, Physical Review E, 84, 4, 1-12, 046211, (2011), doi:10.1103/PhysRevE.84.046211
• Yoji Kawamura, Hiroya Nakao, Kensuke Arai, Hiroshi Kori, Yoshiki Kuramoto, Phase synchronization between collective rhythms of globally coupled oscillator groups: Noiseless nonidentical case, Chaos, 20, 4, 1-8, 043110, (2010), doi:10.1063/1.3491346
• Yoji Kawamura, Hiroya Nakao, Kensuke Arai, Hiroshi Kori, Yoshiki Kuramoto, Phase synchronization between collective rhythms of globally coupled oscillator groups: Noisy identical case, Chaos, 20, 4, 1-10, 043109, (2010), doi:10.1063/1.3491344
• Naoki Masuda, Yoji Kawamura, Hiroshi Kori, Collective fluctuations in networks of noisy components, New Journal of Physics, 12, 9, 1-15, 093007, (2010), doi:10.1088/1367-2630/12/9/093007
• Naoki Masuda, Yoji Kawamura, Hiroshi Kori, Impact of hierarchical modular structure on ranking of individual nodes in directed networks, New Journal of Physics, 11, 11, 1-21, 113002, (2009), doi:10.1088/1367-2630/11/11/113002
• Naoki Masuda, Yoji Kawamura, Hiroshi Kori, Analysis of relative influence of nodes in directed networks, Physical Review E, 80, 4, 1-10, 046114, (2009), doi:10.1103/PhysRevE.80.046114
• Hiroshi Kori, Yoji Kawamura, Hiroya Nakao, Kensuke Arai, Yoshiki Kuramoto, Collective-phase description of coupled oscillators with general network structure, Physical Review E, 80, 3, 1-9, 036207, (2009), doi:10.1103/PhysRevE.80.036207
• Yoji Kawamura, Hiroya Nakao, Kensuke Arai, Hiroshi Kori, Yoshiki Kuramoto, Collective phase sensitivity, Physical Review Letters, 101, 2, 1-4, 024101, (2008), doi:10.1103/PhysRevLett.101.024101
• Hiroya Nakao, Kensuke Arai, Yoji Kawamura, Noise-induced synchronization and clustering in ensembles of uncoupled limit-cycle oscillators, Physical Review Letters, 98, 18, 1-4, 184101, (2007), doi:10.1103/PhysRevLett.98.184101
• Yoji Kawamura, Hole structures in nonlocally coupled noisy phase oscillators, Physical Review E, 76, 4, 1-4, 047201, (2007), doi:10.1103/PhysRevE.76.047201
• Yoji Kawamura, Chimera Ising walls in forced nonlocally coupled oscillators, Physical Review E, 75, 5, 1-6, 056204, (2007), doi:10.1103/PhysRevE.75.056204
• Yoji Kawamura, Hiroya Nakao, Yoshiki Kuramoto, Noise-induced turbulence in nonlocally coupled oscillators, Physical Review E, 75, 3, 1-17, 036209, (2007), doi:10.1103/PhysRevE.75.036209
• Yoshiki Kuramoto, Yoji Kawamura, External noise can cause complex effective dynamics in pattern-forming systems, Journal of the Korean Physical Society, 50, 1, 170-177, (2007), doi:10.3938/jkps.50.170
• Yoji Kawamura, Yoshiki Kuramoto, Phase transition in chemical turbulence through global feedback: Relevance to catalytic CO oxidation on Pt surfaces, Progress of Theoretical Physics Supplement, 161, 216-219, (2006), doi:10.1143/PTPS.161.216
• Yoji Kawamura, Yoshiki Kuramoto, Onset of collective oscillation in chemical turbulence under global feedback, Physical Review E, 69, 1, 1-5, 016202, (2004), doi:10.1103/PhysRevE.69.016202

Other Publications

• Sebastian Baum, Patrick Huber, Patrick Stengel, Natsue Abe, Daniel G. Ang, Lorenzo Apollonio, Gabriela R. Araujo, Levente Balogh, Pranshu Bhaumik Yilda Boukhtouchen, Joseph Bramante, Lorenzo Caccianiga, Andrew Calabrese-Day, Qing Chang, Juan I. Collar, Reza Ebadi, Alexey Elykov, Katherine Freese, Audrey Fung, Claudio Galelli, Arianna E. Gleason, Mariano Guerrero Perez, Janina Hakenmüller, Takeshi Hanyu, Noriko Hasebe, Shigenobu Hirose, Shunsaku Horiuchi, Yasushi Hoshino, Yuki Ido, Vsevolod Ivanov, Takashi Kamiyama, Takenori Kato, Yoji Kawamura, Chris Kelso, Giti A. Khodaparast, Emilie M. LaVoie-Ingram, Matthew Leybourne, Xingxin Liu, Thalles Lucas, Brenden A. Magill Federico M. Mariani, Sharlotte Mkhonto, Hans Pieter Mumm, Kohta Murase, Tatsuhiro Naka, Kenji Oguni, Kathryn Ream, Kate Scholberg, Maximilian Shen, Joshua Spitz, Katsuhiko Suzuki, Alexander Takla, Jiashen Tang, Natalia Tapia-Arellano, Pieter Vermeesch, Aaron C. Vincent, Nikita Vladimirov, Ronald Walsworth, David Waters, Greg Wurtz, Seiko Yamasaki, Xianyi Zhang, Mineral Detection of Neutrinos and Dark Matter 2024. Proceedings, arXiv:2405.01626, 1-70, (2024), doi:10.48550/arXiv.2405.01626
• Yoji Kawamura, Theory of phase reduction for oscillatory convection with infinite degrees of freedom, Meeting Abstracts of the Physical Society of Japan, 71, 2986-2987, (2016), doi:10.11316/jpsgaiyo.71.1.0_2986
• Yoji Kawamura, Hierarchical structure and collective phase description of coupled oscillators, RIMS Kokyuroku, 1827, 51-61, (2013), hdl:2433/194783
• Naoki Masuda, Yoji Kawamura, Hiroshi Kori, Effects of network structure on the precision of biological rhythms, Journal of the Japan Society for Precision Engineering, 77, 2, 145-148, (2011), doi:10.2493/jjspe.77.145
• Naoki Masuda, Yoji Kawamura, Hiroshi Kori, Structure of networks determines the system size dependency of noise intensity in collective dynamics, Seibutsu Butsuri, 49, Supplement, S48-S49, (2009), doi:10.2142/biophys.49.S48_5
• Kunihiko Watanabe, Wataru Ohfuchi, Akira Kageyama, Keiko Takahashi, Fumiaki Araki, Kanya Kusano, Shigenobu Hirose, Hideharu Sasaki, Nobumasa Komori, Takeshi Enomoto, Akira Kuwano-Yoshida, Bunmei Taguchi, Mamoru Hyodo, Mikito Furuichi, Takehiro Miyagoshi, Ryo Onishi, Takeshi Sugimura, Yuya Baba, Shin-ichiro Kida, Shintaro Kawahara, Nobuaki Ohno, Akio Kawano, Tooru Sugiyama, Shin-ichiro Shima, Hiroki Hasegawa, Yoji Kawamura, The Earth Simulator Center, JAMSTEC Report of Research and Development, 9, 1, 75-135, (2009), doi:10.5918/jamstecr.9.1_75
• Yoji Kawamura, Hiroya Nakao, Yoshiki Kuramoto, Hierarchical structure of nonlocally coupled oscillator system, NCTAM papers, 57, 223, (2008), doi:10.11345/japannctam.57.0.223.0
• Hiroya Nakao, Kensuke Arai, Yoji Kawamura, Noise-induced synchronization and clustering in ensembles of uncoupled limit-cycle oscillators, Bussei Kenkyu, 87, 4, 546-549, (2007), hdl:2433/110750
• Yoji Kawamura, Hiroya Nakao, Yoshiki Kuramoto, Noise-induced spatiotemporal chaos in nonlocally coupled oscillators, NCTAM papers, 55, 96, (2006), doi:10.11345/japannctam.55.0.96.0

Books and Book Chapters

• 蔵本由紀・河村洋史, 同期現象の科学 - 位相記述によるアプローチ (353 pages) (京都大学学術出版会, 2017) [Kyoto University Press] [References] [Google Books]
• 蔵本由紀・河村洋史, 同期現象の数理 - 位相記述によるアプローチ (非線形科学シリーズ6) (293 pages) (培風館, 2010) [Google Books]