Ken-ichi Okubo

Profile Information

Affiliation: Faculty of Engineering Department of Electrical Engineering, Tokyo University of Science,Yamaguchi

Degree: 博士(情報学)(Mar, 2020, 京都大学)

ORCID ID: https://orcid.org/0000-0002-7080-3365
J-GLOBAL ID: 202001020558134817
researchmap Member ID: R000003759

Research Interests

Research Areas

Research History

Apr, 2023 - Present

Faculty of Engineering Department of Electrical Engineering, Tokyo University of Science,Yamaguchi
Apr, 2020 - Mar, 2023

大阪大学情報科学研究科特任助教

Education

Apr, 2015 - Mar, 2020

Graduate School of Informatics, Kyoto University
Apr, 2013 - Mar, 2015

Department of Applied Mathematics and Physis, Graduate School of Informatics, Kyoto University
Apr, 2009 - Mar, 2013

School of Advanced Science and Engineering, Waseda University

Committee Memberships

Apr, 2022 - Present

幹事, 日本応用数理学会応用カオス研究部会
Oct, 2021 - Present

委員, The 10th International Council for Industrial and Applied Mathematics(ICIAM2023) プログラム委員会
Oct, 2020 - Present

委員, レーザー学会技術専門委員会「自然に学ぶレーザーカオスと量子ダイナミクス専門委員会」
Apr, 2020 - Mar, 2022

幹事補佐, 日本応用数理学会応用カオス研究部会

Awards

Mar, 2022

上田睆亮賞, 日本応用数理学会応用カオス研究部会

Papers

Spatial-photonic Ising machine by space-division multiplexing with physically tunable coefficients of a multi-component model

Takumi Sakabe, Suguru Shimomura, Yusuke Ogura, Ken-ichi Okubo, Hiroshi Yamashita, Hideyuki Suzuki, Jun Tanida

Optics Express, Dec 5, 2023 Peer-reviewed
Performance enhancement of spatial photonic Ising machine through parallel processing via space-division multiplexing

Suguru Shimomura, Hiroshi Yamashita, Ken-ichi Okubo, Yusuke Ogura, Hideyuki Suzuki, Jun Tanida

The 12th Asia-Pacific Laser Symposium, CTu1-05, Sep, 2023 Peer-reviewed
Low-Rank Combinatorial Optimization and Statistical Learning by Spatial Photonic Ising Machine

Hiroshi Yamashita, Ken-ichi Okubo, Suguru Shimomura, Yusuke Ogura, Jun Tanida, Hideyuki Suzuki

Physical Review Letters, 131(6), Aug 7, 2023 Peer-reviewedLead author
Function Enhancement of Spatial Photonic Ising Machine by Parallel Processing Using Space-Division Multiplexing

Suguru Shimomura, Ken-ichi Okubo, Hiroshi Yamashita, Yusuke Ogura, Hideyuki Suzuki, Jun Tanida

2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Jun 26, 2023 Peer-reviewed
Universal Critical Behavior of Transition to Chaos: Intermittency Route

Ken-ichi Okubo, Ken Umeno

Progress of Theoretical and Experimental Physics, 2022 073A01, Jun 17, 2022 Peer-reviewedLead author
Numerical demonstration of spatial photonic Ising machine by using time-division multiplexing

Suguru Shimomura, Ken-ichi Okubo, Hiroshi Yamashita, Yusuke Ogura, Hideyuki Suzuki, Jun Tanida

Proceedings of the 2022 Conference on Lasers and Electro-Optics Pacific Rim, 2022 Peer-reviewed
Infinite ergodicity that preserves the Lebesgue measure

Ken-ichi Okubo, Ken Umeno

Chaos: An Interdisciplinary Journal of Nonlinear Science, 31(3) 033135-033135, Mar, 2021 Peer-reviewedLead author
Chaotic Estimation for Laser Chaos Using Analytic Lyapunov Exponent in Generalized Boole Transformations

Fumiyoshi KUWASHIMA, Ken UMENO

The Review of Laser Engineering, 48(5) 255-255, Mar, 2020
一般化Boole変換におけるLyapunov指数の理論値を用いたレーザーカオスのカオス性評価

大久保健一, 桒島史欣, 梅野健

レーザー研究, 48, 2020 Peer-reviewedInvitedLead author
Universality of the route to chaos: Exact analysis

Ken-ichi Okubo, Ken Umeno

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2018(10), Oct, 2018 Peer-reviewedLead author
Physical Model of Energy Fluctuation Divergence

Ken-ichi Okubo

JOURNAL OF CONDENSED MATTER NUCLEAR SCIENCE, 24 252-257, Oct, 2017 Peer-reviewedLead author
New Chaos Indicators for Systems with Extremely Small Lyapunov Exponents

Ken-ichi Okubo, Ken Umeno

Chaos, Complexity and Transport, 185-203, Mar, 2017 Peer-reviewedLead author
Exact Lyapunov exponents of the generalized Boole transformations

Ken Umeno, Ken-ichi Okubo

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2016(2), Feb, 2016 Peer-reviewed
Chaos Indicators for Weak Chaos Systems

健梅野

Transactions of the Japan Society for Industrial and Applied Mathematics, Aug, 2015
Chaos Indicators for Weak Chaos Systems

大久保健一, 梅野健

日本応用数理学会論文誌, 25(3) 165-190, Aug, 2015 Peer-reviewedLead author
The Ralation between modified Froeschle map and q-Gaussian distribution

大久保健一, 梅野健

電子情報通信学会技術研究報告, 114(145(NLP2014 31-44)) 65-70, 2014 Lead author

Misc.

拡張超一般化Boole変換におけるK=2Nにおける臨界指数

大久保健一, 梅野健

日本応用数理学会年会講演予稿集(CD-ROM), 2021, 2022
超一般化Boole変換における無限エルゴード性とMittag-Leffler分布

大久保健一, 梅野健

日本応用数理学会年会講演予稿集(CD-ROM), 2020, 2020
あるシンプレクティック写像のAnosov性について

大久保健一, 梅野健

日本応用数理学会年会講演予稿集(CD-ROM), 2019, 2019
超一般化Boole変換のexact性

大久保健一, 梅野健

日本応用数理学会年会講演予稿集(CD-ROM), 2017, 2017
シンプレクティック写像における超拡散と密度関数の振る舞い

大久保健一, 梅野健

日本応用数理学会年会講演予稿集(CD-ROM), 2016, 2016
シンプレクティック写像におけるKSエントロピーと時間の矢

大久保健一, 梅野健

日本応用数理学会年会講演予稿集(CD-ROM), 2015, 2015
21aBL-5 Generalization of FLI which is the method of weak chaos detection : transition from Arnold diffusion to Chirikov diffusion

Okubo K., Umeno K.

Meeting Abstracts of the Physical Society of Japan, 70 2848-2848, 2015
シンプレクティック可解カオス系の非平衡統計物理学

大久保健一, 梅野健

日本応用数理学会年会講演予稿集(CD-ROM), 2014, 2014

Teaching Experience

Nov, 2023 - Present

プログラミング基礎 (山陽小野田市立山口東京理科大学)
Sep, 2023 - Present

データベース論 (山陽小野田市立山口東京理科大学)
Apr, 2023 - Present

学習サポート教室 (山陽小野田市立山口東京理科大学)
Apr, 2023 - Present

プログラミング実習II (山陽小野田市立山口東京理科大学)
Apr, 2023 - Present

電気工学実験II (山陽小野田市立山口東京理科大学)
学問への扉 (大阪大学)
情報数理学概論 (大阪大学)
情報数理学セミナー (大阪大学)

Professional Memberships

Oct, 2020 - Present

Institute of Electronics, Information and Communication Engineers
Jul, 2014 - Present

日本応用数理学会
Feb, 2014 - Present

日本物理学会

Research Projects

Fast Chaos Detection through Data-Driven Approach

Grants-in-Aid for Scientific Research, Grant-in-Aid for Early-Career Scientists, Japan Society for the Promotion of Science, Apr, 2023 - Mar, 2026
Analytical approach to chaotic phenomana for clarifying irreversible behavior

Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows, Grant-in-Aid for JSPS Fellows, Japan Society for the Promotion of Science, Apr, 2017 - Mar, 2020

Academic Activities

2023 International Symposium on Nonlinear Theory and its Applications (NOLTA2023) 査読員

Peer review

May, 2023
Nonlinear Theory and Its Applications, IEICE 査読員

Peer review

Nov, 2022
2022 International Symposium on Nonlinear Theory and its Applications (NOLTA2022) 査読員

Peer review

Jul, 2022
Journal of the Physical Society of Japan (JPSJ) 査読員

Peer review

Jul, 2020
2020 International Symposium on Nonlinear Theory and its Applications (NOLTA2020) 査読員

Peer review

Jun, 2020
Chaos, Solitons & Fractals 査読員

Peer review

Feb, 2018

Social Activities

AC・Net 学生セミナー

Lecturer

NICT(AC Net), Oct 1, 2021

Profile Information

Research Interests

Research Areas

Research History

Education

Committee Memberships

Awards

Papers

Misc.

Teaching Experience

Professional Memberships

Research Projects

Academic Activities

Social Activities

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