Watanabe, Hiroshi

写真a

Affiliation

Faculty of Science and Technology, Department of Applied Physics and Physico-Informatics （Yagami）

Position

Associate Professor

Related Websites

External Links
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Career 【 Display / hide 】

  • 2004.04
    -
    2007.03

    名古屋大学大学院情報科学研究科複雑系科学専攻, 他自由度システム情報論講座, 助手

  • 2007.04
    -
    2008.07

    名古屋大学大学院情報科学研究科複雑系科学専攻, 他自由度システム情報論講座, 助教

  • 2008.08
    -
    2010.07

    東京大学情報センター, スーパーコンピューティング部門, 特任講師

  • 2010.08
    -
    2019.03

    東京大学物性研究所, 物質設計評価施設, 助教

  • 2019.04
    -
    Present

    慶応義塾大学, 理工学部物理情報工学科, 准教授

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Academic Background 【 Display / hide 】

  • 1999.04
    -
    2001.03

    The University of Tokyo, 工学系研究科, 物理工学専攻

    Graduate School, Completed, Master's course

  • 2001.04
    -
    2004.03

    The University of Tokyo, 工学系研究科, 物理工学専攻

    Graduate School, Completed, Doctoral course

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Books 【 Display / hide 】

  • ゼロから学ぶPythonプログラミング Google Colaboratoryでらくらく導入

    渡辺宙志, 講談社, 2020.12,  Page： 256

  • The Art of High Performance Computing for Computational Science, Vol. 1

    ed. by Masaaki Geshi, Springer, 2019

    Scope: Chapter 9,  Contact page： pp. 169-189

  • 計算科学のためのHPC技術１

    下司雅章 編／片桐孝洋，中田真秀，渡辺宙志，山本有作，吉井範行，Jaewoon Jung，杉田有治，石村和也，大石進一，関根晃太，森倉悠介，黒田久泰 著, 大阪大学出版会, 2017.03

    Scope: 第7章,  Contact page： pp. 129-157

  • 超多自由度系の新しい科学

    金田 行雄・笹井 理生監修・笹井 理生編, 共立出版, 2010.11

    Scope: 4.3節,  Contact page： pp. 525-282

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Papers 【 Display / hide 】

  • Molecular dynamics simulation of soundwave propagation in a simple fluid

    Asano Yuta, Watanabe Hiroshi, Noguchi Hiroshi

    JOURNAL OF CHEMICAL PHYSICS 153 （ 12 ）  2020.09

    Research paper (scientific journal), Accepted,  ISSN  0021-9606

  • Effects of cavitation on Karman vortex behind circular-cylinder arrays: A molecular dynamics study

    Yuta Asano, Hiroshi Watanabe, Hiroshi Noguchi

    The Journal of Chemical Physics 152 （ 3 ）  2020.01

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  0021-9606

  • Finite-Size Effects on Karman Vortex in Molecular Dynamics Simulation

    Asano Yuta, Watanabe Hiroshi, Noguchi Hiroshi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 88 （ 7 ）  2019.07

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  0031-9015

  • SIMD vectorization for the Lennard-Jones potential with AVX2 and AVX-512 instructions

    Watanabe Hiroshi, Nakagawa Koh M.

    COMPUTER PHYSICS COMMUNICATIONS 237   1 - 7 2019.04

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  0010-4655

  • Fast Algorithm for Generating Random Bit Strings and Multispin Coding for Directed Percolation

    Watanabe Hiroshi, Morita Satoshi, Todo Synge, Kawashima Naoki

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 88 （ 2 ）  2019.02

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  0031-9015

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Papers, etc., Registered in KOARA 【 Display / hide 】

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Presentations 【 Display / hide 】

  • ポッツ模型におけるBinder比の 非単調な振る舞いについて

    渡辺宙志、森田悟史、本山裕一、川島直輝

    日本物理学会第75回年次大会 (名古屋大学東山キャンパス) , 2020.03, Oral Presentation(general)

  • スパコンでできること、できないこと

    渡辺宙志

    金沢大学理工学域理学談話会 (金沢大学角間キャンパス) , 2019.12, Oral Presentation(general)

  • コンパイラのいじめかた

    渡辺宙志

    C++ MIX #6 (Preferred Networks) , 2019.11, Oral Presentation(general)

  • ランダムビット列を高速に生成するアルゴリズムの開発

    渡辺宙志、森田悟史、藤堂眞治、川島直輝

    日本物理学会2019年秋季大会 (岐阜大学) , 2019.09, Oral Presentation(general)

  • 非ハミルトン系における数値積分法とシンプレクティック性

    渡辺宙志

    日本物理学会第73回年次大会 (東京理科大学野田キャンパス) , 2018.03, Oral Presentation(general)

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

  • 大規模分子動力学フレームワークの開発と複雑流体への応用

    2021.04
    -
    2026.03

    Keio University, 渡辺 宙志, Grant-in-Aid for Scientific Research (C)

  • Molecular Dynamics Study on Complex Fluid with Impurities and Bubbles

    2015.04
    -
    2020.03

    The University of Tokyo, Watanabe Hiroshi, Grant-in-Aid for Scientific Research (C)

    　View Summary

    The behavior of complex fluids, which contains polymers or bubbles, was investigated by molecular dynamics simulations. We have studied the Kalman vortexes occurring at the rear of the cylinder and found that the vortexes become blurred for fluid with polymers. This phenomenon did not occur when the length of the polymer was short, indicating that the length of the polymer was important. In a flow with bubble formation, the position of the vortex generation shifted to the rear and the reaction from the vortexes on the cylinder disappears. These findings can only be obtained by studying the molecular scale by molecular dynamics methods.

  • Numerical study on nonequiribrium phenomena involving phase transitions

    2011.04
    -
    2015.03

    The University of Tokyo, WATANABE Hiroshi, Grant-in-Aid for Young Scientists (B)

    　View Summary

    We have studied Ostwald ripening of bubbles by molecular dynamics simulations involving billions of particles. The scaling exponents were estimated from the bubble-size distribution function and the values of them were successfully described by the classical theory of Ostwald ripening, the Lifshitz-Slyozov-Wagner (LSW) theory. This is the first direct confirmation of LSW theory in bubble nuclei. As temperature increases, the crossover of the scaling exponent is observed. This crossover implies that the growth of bubbles changes from interface-limited to diffusion-limited. We also observed the growth rate of the bubbles (the kinetic term) directly for the first time. While the kinetic term is well described by the theory in the scaling region, it has broad distribution in early stage. This behavior shows that the inhomogeneity of the pressure in the system and the inhomogeneity is the reason why the classical theory fails to describe the early stage of the bubble nucleation.

  • Fractal structure of lattice models and applications to equilibrium and non-equilibrium systems

    2007
    -
    2010

    Nagoya University, MINAMI Kazuhiko, KONISHI Tetsuro, Grant-in-Aid for Scientific Research (C)

    　View Summary

    It is derived that the two-dimensional cell sorting problem is mathematically equivalent to the one-dimensional random walk with pair creations and annihilations, i. e. the adhesion probabilities in the cell sorting model analytically relate to the expectation values in the random walk problem. This is an example that two completely different biological systems are governed by a common mathematical structure. This result is obtained through the equivalences of these systems with lattice spin models. It is also shown that arbitrary generation operators can be written by the spin operators, and hence all of the biological stochastic problems can in principle be analyzed with the use of the techniques and knowledges already obtained in the area of lattice spin systems.

  • Theoretical Study of Non-Hermitian Dynamics on the Basis of the Classical Mechanics

    2007
    -
    2010

    Nagoya University, WATANABE Hiroshi, Grant-in-Aid for Young Scientists (B)

    　View Summary

    The Nose-Hoover method is studied as a non-Hamilton dynamics system. A stochastic process of the Nose-Hoover method is discussed on the basis of the Markovian approximation. It is proved that the dynamics which achieves Gibbs' canonical distribution must involve non-canonical transformation.

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Awards 【 Display / hide 】

  • 東京大学物性研究所 所長賞 (ISSP柏賞)

    福田 毅哉, 荒木 繁行, 髙橋 智恵子, 渡辺 宙志, 矢田 裕行, 2019.03, 東京大学物性研究所, ストックルームシステムの更新

    Type of Award： Other Awards

  • 東京大学物性研究所 所長賞 (ISSP学術奨励賞)

    2017.03, 東京大学物性研究所, 気泡核のオストワルド成長

    Type of Award： Other Awards

  • 2002年度未踏ユース「スーパークリエータ」認定

    2003.08, 情報処理推進機構, 量子計算回路の設計と計算シミュレーターの開発

    Type of Award： Awards of Publisher, Newspaper Company and Foundation

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Courses Taught 【 Display / hide 】

  • SPECIAL TOPICS IN APPLIED PHYSICS AND PHYSICO-INFORMATICS

    2021

  • SOFTWARE DEVELOPMENT EXERCISE FOR APPLIED PHYSICS AND PHYSICO-INFORMATICS

    2021

  • PRESENTATION TECHNIQUE

    2021

  • LABORATORY IN SCIENCE

    2021

  • INTRODUCTION TO COMPUTER PROGRAMMING(LECTURE AND EXERCISE)

    2021

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Memberships in Academic Societies 【 Display / hide 】

  • American Physical Society, 

    2008.03
    -
    2016.05

  • 情報処理学会, 

    2002.01
    -
    Present

  • 日本物理学会, 

    2000.03
    -
    Present
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Committee Experiences 【 Display / hide 】

  • 2019.03
    -
    2021.03

    日本物理学会第75〜76期代議員, 日本物理学会

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