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Koba Hajime
古場 一
Koba Hajime
古場 一
Graduate School of Engineering Science Department of Systems Innovation, Associate Professor

keyword Fluid Mathematics,Mathematical Modeling,Mathematical Science,Partial Differential Equations,Mathematical and Scientific Modeling

Research History 4

  1. 2023/06 - Present
    Osaka University Graduate School of Engineering Science Associate Professor

  2. 2016/04 - 2023/06
    Osaka University Graduate School of Engineering Science Assistant Professor

  3. 2013/04 - 2016/03
    Waseda University Faculty of Science and Engineering

  4. 2011/04 - 2013/03
    東京大学・日本学術振興会特別研究員・DC2

Education 3

  1. The University of Tokyo Graduate School of Mathematical Sciences

    - 2013/03

  2. The University of Tokyo Graduate School of Mathematical Sciences

    - 2010/03

  3. Keio University Faculty of Science and Engineering

    - 2008/03

Professional Memberships 2

  1. Japan Society of Fluid Mechanics

  2. Mathematical Society of Japan

Research Areas 3

  1. Natural sciences / Basic analysis /

  2. Natural sciences / Applied mathematics and statistics /

  3. Natural sciences / Mathematical analysis /

Awards 1

  1. 2013年度第30回井上研究奨励賞

    古場 一 公益財団法人 井上科学振興財団 2014/02

Papers 14

  1. Error analysis of approximate operators for a particle method based on Voronoi diagram

    Hajime Koba, Kazuki Sato

    Analysis 2023/11/01 Research paper (scientific journal)

  2. ON GENERALIZED COMPRESSIBLE FLUID SYSTEMS ON AN EVOLVING SURFACE WITH A BOUNDARY

    Hajime Koba

    QUARTERLY OF APPLIED MATHEMATICS 2023/02 Research paper (scientific journal)

  3. Thermodynamical Modeling of Multiphase Flow System with Surface Tension and Flow

    Hajime Koba

    Mathematical Modelling of Natural Phenomena 2023 Research paper (scientific journal)

  4. LOCAL AND GLOBAL SOLVABILITY FOR ADVECTION-DIFFUSION EQUATION ON AN EVOLVING SURFACE WITH A BOUNDARY

    Hajime Koba

    ANALYSIS & PDE Vol. 15 No. 7 p. 1617-1654 2022 Research paper (scientific journal)

  5. ON GENERALIZED DIFFUSION AND HEAT SYSTEMS ON AN EVOLVING SURFACE WITH A BOUNDARY

    Hajime Koba

    QUARTERLY OF APPLIED MATHEMATICS Vol. 78 No. 4 p. 617-640 2020/12 Research paper (scientific journal)

  6. Energetic variational approaches for non-Newtonian fluid systems

    Hajime Koba, Kazuki Sato

    ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK Vol. 69 No. 6 2018/12 Research paper (scientific journal)

  7. On derivation of compressible fluid systems on an evolving surface

    Hajime Koba

    Quarterly of Applied Mathematics Vol. 76 No. 2 p. 303-359 2018/02 Research paper (scientific journal)

  8. ENERGETIC VARIATIONAL APPROACHES FOR INCOMPRESSIBLE FLUID SYSTEMS ON AN EVOLVING SURFACE (vol 75, pg 359, 2010)

    Hajime Koba, Chun Liu, Yoshikazu Giga

    QUARTERLY OF APPLIED MATHEMATICS Vol. 76 No. 1 p. 147-152 2018/01

  9. ENERGETIC VARIATIONAL APPROACHES FOR INCOMPRESSIBLE FLUID SYSTEMS ON AN EVOLVING SURFACE

    Hajime Koba, Chun Liu, Yoshikazu Giga

    QUARTERLY OF APPLIED MATHEMATICS Vol. 75 No. 2 p. 359-389 2017/02 Research paper (scientific journal)

  10. On L-3,L-infinity-stability of the Navier-Stokes system in exterior domains

    Hajime Koba

    JOURNAL OF DIFFERENTIAL EQUATIONS Vol. 262 No. 3 p. 2618-2683 2017/01 Research paper (scientific journal)

  11. On stability of Leray's stationary solutions of the Navier-Stokes system in exterior domains

    Hajime Koba

    JOURNAL OF THE MATHEMATICAL SOCIETY OF JAPAN Vol. 69 No. 1 p. 373-396 2017/01 Research paper (scientific journal)

  12. Generalized quasi-reversibility method for a backward heat equation with a fractional Laplacian

    Hajime Koba, Hideki Matsuoka

    Analysis Vol. 35 No. 1 2015/01/01 Research paper (scientific journal)

    Publisher: Walter de Gruyter GmbH
  13. On Stability of the Spatially Inhomogeneous Navier-Stokes-Boussinesq System with General Nonlinearity

    Hajime Koba

    Archive for Rational Mechanics and Analysis Vol. 215 No. 3 p. 907-965 2015/01 Research paper (scientific journal)

  14. Global well-posedness for the rotating Navier-Stokes-Boussinesq equations with stratification effects

    Hajime Koba, Alex Mahalov, Tsuyoshi Yoneda

    Advances in Mathematical Sciences and Applications Vol. 22 No. 1 p. 61-90 2012/01 Research paper (scientific journal)

Misc. 8

  1. Global solvability for the heat equations in two half spaces and an interface

    Hajime Koba

    2024/01/10

  2. Energetic Variational Approaches for inviscid multiphase flow systems with surface flow and tension

    Hajime Koba

    2022/11/12

  3. Energetic variational approaches for multiphase flow systems with phase transition

    Hajime Koba

    2022/10/29

  4. On the Poisson Equation on a Surface with a boundary condition in co-normal direction

    Hajime Koba, Yuki Wakasugi

    2022/09/14

  5. On derivation of incompressible fluid systems with heat equation (Mathematical Analysis of Viscous Incompressible Fluid)

    Koba, Hajime

    RIMS Kokyuroku Vol. 2058 p. 130-147 2017/10

    Publisher: 京都大学数理解析研究所
  6. On Fluid Flow on a Moving Hypersurface

    Hajime Koba

    2015/01 Research paper, summary (national, other academic conference)

  7. Nonlinear Stability of Ekman Boundary Layers in Rotating Stratified Fluids

    Hajime Koba

    MEMOIRS OF THE AMERICAN MATHEMATICAL SOCIETY Vol. 228 No. 1073 p. 1-+ 2014/03

  8. Asymptotic stability for a geophysical system (Mathematical Analysis in Fluid and Gas Dynamics)

    KOBA HAJIME

    RIMS Kokyuroku Vol. 1830 p. 16-33 2013/04

    Publisher: Kyoto University

Publications 2

  1. Nonlinear stability of Ekman boundary layers in rotating stratified fluids

    古場 一

    American Mathematical Society 2013

    ISBN: 9780821891339

  2. Stability of Navier-Stokes-Boussinesq Type Systems = ナヴィエ・ストークス・ブジネスク型方程式の安定性

    古場 一

    東京大学数理科学研究科 2012

Academic Activities 1

  1. Mathematical Reviews Reviewer/MathSciNet Reviewer (American Mathematical Society)

    2015/08 - Present

Institutional Repository 1

Content Published in the University of Osaka Institutional Repository (OUKA)
  1. Error analysis of approximate operators for a particle method based on Voronoi diagram

    Koba Hajime, Sato Kazuki

    Analysis Vol. 43 No. 4 p. 267-283 2023/02/28