Hisashi Okamoto | Academic Influence

Hisashi Okamoto's AcademicInfluence.com Rankings

Hisashi Okamoto

Mathematics

#7568

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#10265

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Group Theory

#241

World Rank

#286

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Number Theory

#345

World Rank

#430

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Algebra

#590

World Rank

#775

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Mathematics

Hisashi Okamoto's Degrees

Bachelors Mathematics University of Tokyo
Masters Mathematics University of Tokyo
PhD Mathematics University of Tokyo

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Why Is Hisashi Okamoto Influential?

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According to Wikipedia, Hisashi Okamoto is a Japanese applied mathematician, specializing in mathematical fluid mechanics and computational fluid dynamics. Okamoto graduated from the University of Tokyo in March 1979. In April 1981 he became a research associate to Hiroshi Fujita at the University of Tokyo. There in 1985 he received his Doctorate of Science with Fujita as advisor. For the academic year 1986–1987 Okamoto was a visiting fellow at the University of Minnesota's Institute for Mathematics and Its Applications. In August 1987 Okamoto became an associate professor in the University of Tokyo's Department of Applied Science. In 1988 he visited the National University of Singapore. At Kyoto University's Research Institute for Mathematical Sciences , he became an associate professor in April 1990 and a full professor in April 1994. At RIMS he was Head of the Computer Science Research Laboratory from 2004 to 2005 and deputy director in 2006, 2009, and 2011. He is editor-in-chief of the Japan Journal of Industrial and Applied Mathematics .

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Hisashi Okamoto's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

The mathematical theory of permanent progressive water-waves (2001) (141)
The collocation points of the fundamental solution method for the potential problem (1996) (115)
On a generalization of the Constantin–Lax–Majda equation (2008) (91)
Bifurcation diagrams in Kolmogorov's problem of viscous incompressible fluid on 2-D flat tori (1991) (59)
Auxin changes both the extensibility and the yield threshold of the cell wall of vigna hypocotyls (1991) (52)
SOME SIMILARITY SOLUTIONS OF THE NAVIER-STOKES EQUATIONS AND RELATED TOPICS (2000) (51)
The role of electrogenic xylem pumps in K+ absorption from the zylem of Vigna unguiculata: the effects of auxin and fusicoccin (1985) (48)
The isolation of wall‐bound proteins regulating yield threshold tension in glycerinated hollow cylinders of cowpea hypocotyl (2000) (46)
Vortex Motion on a Sphere (1987) (38)
Exact solutions of the Navier-Stokes equations via Leray’s scheme (1997) (37)
A pressure-jump method as a new tool in growth physiology for monitoring physiological wall extensibility and effective turgor (1989) (37)
A remark on continuous, nowhere differentiable functions (2005) (36)
Well-Posedness of the Generalized Proudman–Johnson Equation Without Viscosity (2009) (34)
Effect of infection by Phytophthora infestans on the membrane potential of potato cells (1983) (32)
Two proteins regulate the cell wall extensibility and the yield threshold in glycerinated hollow cylinders of cowpea hypocotyl (1995) (31)
A geometric construction of continuous, strictly increasing singular functions (2007) (30)
Effects of auxin and anoxia on the cell wall yield threshold determined by negative pressure jumps in segments of cowpea hypocotyl. (1990) (30)
The pH‐dependent yield threshold of the cell wall in a glycerinated hollow cylinder (in vitro system) of cowpea hypocotyl (1994) (29)
Structure and function of the elongation sink in the stems of higher plants I. Effects of anoxia and IAA on the growth rate and the spatially separate electrogenic ion pumps (1980) (29)
On the Role of the Convection Term in the Equations of Motion of Incompressible Fluid (2005) (29)
Distribution of electric potential and ion transport in the hypocotyl of Vigna sesquipedalis VI. The dual structure of radial electrogenic activity (1979) (28)
On the semi-discrete finite element approximation for the nonstationary Navier-Stokes equation (1982) (27)
On the equation of nonstationary stratified fluid motion : Uniqueness and existence of the solutions (1984) (26)
A new method in growth‐electrophysiology: Pressurized intra‐organ perfusion (1984) (25)
INTRACELLULAR CONCENTRATION OF IONS IN A HALOPHILIC STRAIN OF CHLAMYDOMONAS. I. CONCENTRATION OF NA, K AND CL IN THE CELL. (1964) (22)
Vortices of large scale appearing in the 2D stationary Navier–Stokes equations at large Reynolds numbers (2010) (21)
The electrogenic proton pumping from parenchyma symplast into xylem - direct demonstration by xylem perfusion (1985) (21)
Global existence of solutions to the Proudman-Johnson equation (2000) (21)
The quantitative and chronological relationship between IAA-induced H+-pump activation and elongation growth studied by means of xylem perfusion (1988) (20)
Symplast as a Functional Unit in Plant Growth (1992) (20)
An Application of Draghicescu's Fast Summation Method to Vortex Sheet Motion (1998) (20)
A Uniqueness Theorem for the Unbounded Classical Solution of the Nonstationary Navier-Stokes Equations in R3 (1994) (18)
Bifurcations and inviscid limit of rhombic Navier–Stokes flows in tori (2003) (18)
Unimodal patterns appearing in the Kolmogorov flows at large Reynolds numbers (2015) (18)
Nearly singular two-dimensional Kolmogorov flows for large Reynolds numbers (1994) (18)
Stability Analysis of Navier-Stokes Flows in Annuli (1997) (17)
Global existence of solutions to the generalized Proudman-Johnson equation (2002) (16)
Distribution of electric potential and ion transport in the hypocotyl of Vigna sesquipedalis I. Distribution of overall ion concentration and the role of hydrogen ion in generation of potential difference (1970) (16)
Studies on host-specific AF-toxins produced by Alternaria alternata strawberry pathotype causing alternaria black spot of strawberry. 5 Effect of toxins on membrane potential of susceptible plants as assessed by electrophysiological method. (1986) (16)
Effects of hyphal wall components of Phytophthora infestans on membrane potential of potato tuber cells (1982) (15)
Effect of AK-Toxin Produced by Alternaria alternata Japanese Pear Pathotype on Membrane Potential of Pear Cell (1989) (14)
On the problem of water waves of permanent configuration (1990) (14)
Structure and function of the elongation sink in the stems of higher plants. (1982) (14)
Measurement of the Respiration-Dependent Component of Intracellular Pressure with an Improved Pressure Probe (1990) (13)
Recent Developments of Mathematical Fluid Mechanics (2016) (13)
A study of bifurcation of Kolmogorov flows with an emphasis on the singular limit. (1998) (13)
The generalized Proudman–Johnson equation at large Reynolds numbers (2013) (13)
Weak periodic solutions and numerical case studies of the Fornberg-Whitham equation (2018) (12)
Effects of anoxia and high CO2 concentration on the electrogenic activity of leaf cell membrane in the dark (1976) (11)
TRANSPORT OF CATIONS FROM COTYLEDON TO SEEDLING OF THE EMBRYONIC PLANTS OF VIGNA SESQUIPEDALIS (1962) (10)
A three-dimensional autonomous system with unbounded ‘bending’ solutions (2002) (9)
Uniqueness of Crapper's pure capillary waves of permanent shape (2005) (9)
Numerical computation of vortex sheet roll-up in the background shear flow (1996) (9)
Bifurcation phenomena in a free boundary problem for a circulating flow with surface tension (1984) (9)
Evidence for high activity of xylem parenchyma and ray cells in the interface of host stem and Agrobacterium tumefaciens-induced tumours of Ricinus communis. (2002) (9)
Trajectories of fluid particles in a periodic water wave (2012) (9)
Structure and function of the elongation sink in the stems of higher plants. II. Effects of acids and anoxia on the growth rate and the spatially separate electrogenic ion pumps. (1982) (9)
Blow-up problems modeled from the strain-vorticity dynamics (Tosio Kato's Method and Principle for Evolution Equations in Mathematical Physics) (2001) (8)
Correlation between the seasonal changes in electrogenic activity across root xylem/symplast interface, sap-flow rate and xylem pressure in field trees (Diospyros kaki) (2007) (8)
The Role of Membrane Potential for the Control of Elongation Growth of Vigna Hypocotyl: Response of a Hollow Cylinder to Osmotic and Ionic Stress (1987) (8)
Membrane Potential Change Induced by Infection by Phytophthora infestans of Potato Cells (1987) (8)
Steady-states and traveling-wave solutions of the generalized Constantin--Lax--Majda equation (2014) (8)
Regulation of Elongation Growth of Excised segments of Vigna Hypocotyl under Osmotic Stress in the Absence or Presence of Absorbable Solute (1989) (8)
On the well-posedness of various one-dimensional model equations for fluid motion (2017) (8)
Osmotic and hormonal control of electrogenic ion pumps and growth in pea hypocotyl segments by pressurized intra-organ perfusion. (1984) (8)
On the global branches of the solutions to a nonlocal boundary-value problem arising in Oseen's spiral flows (2003) (8)
Further Remarks on Asymptotic Behavior of the Numerical Solutions of Parabolic Blow-up Problems (2007) (7)
A blow-up problem for a nonlinear heat equation in the complex plane of time (2016) (7)
A singular perturbation problem arising in Oseen’s spiral flows (2001) (7)
The effects of auxin on the mechanical properties in vivo of cell wall in hypocotyl segments from gibberellin-deficient cowpea seedlings (1995) (7)
Effect of pre-inoculational heat-treatment on the membrane potential change of potato cell induced by infection with Phytophthora infestans (1989) (7)
Blow-up Solutions Appearing in the Vorticity Dynamics with Linear Strain (2004) (7)
A stationary free boundary problem for a circular flow with or without surface tension (1982) (7)
The resonance of modes in the problem of two-dimensional capillary-gravity waves (1996) (7)
Nonstationary free boundary problem for perfect fluid with surface tension (1986) (7)
Effects of osmotic stress, ionic stress and IAA on the cell-membrane resistance of Vigna hypocotyls (1991) (6)
Models and Special Solutions of the Navier–Stokes Equations (2016) (6)
Isolation and Pure Culture of a Halophilic Strain of Chlamydomonas (1961) (6)
Axisymmetric Stagnation Flow Converging Obliquely on a Cylinder (1995) (6)
Long Term Measurement of the Trans-Root Electric Potential in a Persimmon Tree in the Field (1999) (6)
A Four-Leaf Chaotic Attractor of a Three-Dimensional Dynamical System (2015) (6)
Correction to: Rigorous numerics for nonlinear heat equations in the complex plane of time (2019) (6)
On the interior layer appearing in the similarity solutions of the Navier-Stokes equations (2002) (6)
Unimodal patterns appearing in the two-dimensional Navier-Stokes flows under general forcing at large Reynolds numbers (2017) (6)
Homeostatic Regulation of Membrane Potential by an Electrogenic Ion Pump against Change in the K+ Concentration of the Extra- and Intra-Organ Perfusion Solutions (1985) (6)
Three-dimensional forced-damped dynamical systems with rich dynamics : bifurcations, chaos and unbounded solutions (2015) (5)
Interaction between Cell Surface and Several Types of Solutes with Special Reference to the Osmotic Regulation Mechanism, in a Moderately Halophilic Strain of Chlamydomonas (1962) (5)
Interfacial progressive water waves - a singularity-theoretic view (1997) (5)
Localization of singularities in inviscid limit — numerical examples (1998) (5)
Distribution of Electric Potential on the Seedling of Phaseolus angularis, a Hypogeal Plant (1958) (5)
Nonstationary or Stationary Free Boundary Problems for Perfect Fluid with Surface Tension (1984) (5)
Numerical computation of water and solitary waves by the double exponential transform (2003) (5)
Effects of Exogenous Auxin on the Regulation of Elongation Growth of Excised Segments of Vigna Hypocotyls under Osmotic Stress (1992) (5)
The generalized Proudman–Johnson equation and its singular perturbation problems (2014) (5)
A computer-assisted proof of existence of a periodic solution (2014) (4)
A Blow-up Problem Related to the Euler Equations of Incompressible Inviscid Fluid Motion (2003) (4)
O(2)-equivariant Bifurcation Equations of mode (1, 2) (1989) (4)
DegenerateO(2)-Equivariant bifurcation equations and their applications to the taylor problem (1991) (4)
Blow-up problems in the strained vorticity dynamics and critical exponents (2013) (4)
A variational problem arising in the two-dimensional Navier-Stokes equations with vanishing viscosity (1994) (4)
Effect of Gas Partial Pressure on the Electrogenic Mechanism of Plant Cell Membranes (1974) (3)
Second-Harmonic Resonance with Parametric Excitation and Damping (2001) (3)
Remarks on the Bifurcation of Two Dimensional Capillary-Gravity Waves of Finite Depth (1994) (3)
Demonstration of Respiration-Dependent Water Uptake and Turgor Generation in Vigna Hypocotyl (1988) (3)
The Relationship between Levels of Endogenous Gibberellins and the Response of Vigna Hypocotyls to Exogenous Indole-3-Acetic Acid (1995) (3)
Particle trajectories around a running cylinder or a sphere (2010) (3)
Further examination of the effects of IAA and anoxia on the growth rate and the spatially separate electrogenic ion pumps in bean hypocotyl (1983) (3)
Demonstration of the root surface electrogenic ion pump activity revealed from the seasonal inversion in the phase relation between electro-radicogram and the diurnal oscillation of air temperature in a field tree (Diospyros kaki) (2009) (3)
Osmotic regulation in a halophilie Chlamydomonas cell. I. General feature of the response to the change in osmotic pressure. (1967) (3)
Effects of Gibberellin on Auxin-Induced Hyperpolarization of Cell Membranes in Hypocotyls of Vigna unguiculata (1994) (3)
Applications of the Fourier transform to the boundary element method (1988) (3)
A brief note on growth physiology of plants (1996) (2)
A numerical approach to a free boundary problem of a circulating perfect fluid (1985) (2)
Activation of the root xylem proton pump by hydraulic signals from leaves under suppressed transpiration (2022) (2)
Characterization of ATPase Activity Associated with Plasma Membrane from Vigna Hypocotyls (1984) (2)
Finite difference schemes for an axisymmetric nonlinear heat equation with blow-up (2020) (2)
Prandtl–Batchelor Theory for Kolmogorov Flows (2020) (2)
Applications of degenerate bifurcation equations to the taylor problem and the water wave problem (1990) (2)
Effects of Osmotic Stress, Salt Stress and IAA on the Regeneration of the Resting Membrane Potential after Excision of a Segment from an Intact Plant (1988) (2)
Uniqueness of the exact solutions of the Navier—Stokes equations having null nonlinearity (2006) (2)
Rigorous numerics for nonlinear heat equations in the complex plane of time (2022) (1)
Electrogenic Ion Pump in Plants-A Review (1975) (1)
Normal Forms of the Bifurcation Equations in the Problem of Capillary-Gravity Waves(Mathematical Aspects on Nonlinear Waves in Fluids) (1991) (1)
Message from the new editor-in-chief (2016) (1)
Unimodal solutions of the generalized Constantin–Lax–Majda equation with viscosity (2018) (1)
Very High FET Mobilities in Organic Field Effect Transistors Fabricated with Smectic Liquid Crystals (2014) (1)
Existence proof of unimodal solutions of the Proudman–Johnson equation via interval analysis (2019) (1)
[Particle size distribution of monodispersed barium sulfate prepared by EDTA-method]. (1962) (1)
A strengthening of the editorial board (2019) (1)
O(2)-Equivariant Bifurcation Equations with Two Modes Interaction (1987) (1)
On the Existence of Progressive Waves in the Flow of Perfect Fluid around a Circle (1986) (1)
Regarding invited papers on dynamical systems (2015) (0)
A Mathematical Introduction to BIfurcation of Periodic Progressive Water Waves (1990) (0)
Stationary flows with highly localized vorticity of the incompressible viscous fluid at large Reynolds numbers (2022) (0)
Preface to the special issue for the proceedings of the Fourth China–Japan–Korea Conference on Numerical Mathematics (2013) (0)
The inviscid limit of steady-states of the Navier-Stokes equations ⁄ (2003) (0)
Regarding invited papers on dynamical systems (2015) (0)
The Work of Yoshihiro Shibata (2016) (0)
In Memoriam (2018) (0)
Method and device for manipulating particle and measuring instrument utilizing them (1992) (0)
AN EXPERIMENTAL STUDY ON THE STERN BILGE VORTICES OF FULL HULL FORM (1968) (0)
On the Unique Solvability of the Equation Describing Unsteady Motion of a Stratified Fluid (応用科学における偏微分方程式と数値解析) (1982) (0)
On the Distribution of Electric Potential on the of Vigna sesquipedalis and its Change by the Light Stimulation (2006) (0)
An Algorithm for Computing a Nondegenerate Hysteresis Point (1991) (0)
Pure Capillary Waves (2001) (0)
A generalization of Liapunov's theorem concerning a mass of fluid with self-gravitation (1984) (0)
Degenerate bifurcations in the Taylor-Couette problem (1989) (0)
Tosio Kato’s Unpublished Paper (2019) (0)
Stationary water waves on rotational flows of two vortical layers (2020) (0)
A thorough description of one-dimensional steady open channel flows using the notion of viscosity solution (2022) (0)
Unimodal solutions of the generalized Constantin–Lax–Majda equation with viscosity (2018) (0)
The generalized Proudman–Johnson equation and its singular perturbation problems (2014) (0)
Capillary-Gravity Waves (2001) (0)
Preface to the special issue on discrete structure and optimization (2012) (0)
Estimation of Composition Profile in Gradient Components Powder Layer Formed by Sedimentation in Liquid (1998) (0)
Study on the Relation Between Manoeuvering Tests Using a Free Running Model and Forced Yawing Ones (1977) (0)
Waves of Negative Parameters (2001) (0)
Interfacial Progressive Waves (2001) (0)
Why and How the Bio-Electric Activity of Plant Roots is Awoken When the Leaves Need Water? A Very Rapid Signal Transmission from Aerial Part to Root (2022) (0)
Dynamical System Arising in Nonstationary Motion of a Free Boundary of a Perfect Fluid(Nonlinear Evolution Equation : Theory and Applications) (1985) (0)
A nonlinear boundary-value problem with an integral constraint Dedicated to Professor Yasumasa Nishiura on the occasion of his 60th birthday (2012) (0)
TEMPERATURE DEPENDENCY OF THE MECHANICALPROPERTIES OF IN VITRO CELL WALL (1995) (0)
Stationary vortices of large scale for large Reynolds number fluid flows (2010) (0)
Message from the new editor-in-chief (2016) (0)
Stationary water waves on rotational flows of two vortical layers (2020) (0)
A computer-assisted analysis of the two dimensional Navier-Stokes equations (1993) (0)
Model Experiments on Manoeuvrability and Automatic Navigation on Settled Route in the Circulating Water Channel (First Report) (1969) (0)
Chaotic Advection by a Point Vortex in a Semidisk (1989) (0)
Global existence theorems on nonstationary stratified flow of incompressible vis (1985) (0)
Book of Abstracts of the First China-Japan-Korea Joint Conference on Numerical Mathematics & The Second East Asia SIAM Symposium (2006) (0)
A nonlinear boundary-value problem with an integral constraint : Dedicated to Professor Yasumasa Nishiura on the occasion of his 60th birthday (Far-From-Equilibrium Dynamics) (2012) (0)
Numerical Solutions of Mode (1,4) and (2,3) (2001) (0)
Nonexistence of bifurcation from Crapper's pure capillary waves(Mathematical Analysis of Phenomena in Fluid and Plasma Dynamics) (1991) (0)
Long term measurement of the xylem potential by unpolarizable electrode via liquid junction (1994) (0)
Preface to the special issue for the proceedings of the Fourth China–Japan–Korea Conference on Numerical Mathematics (2013) (0)
Title Nonexistence of bifurcation from Crapper's pure capillary waves(Mathematical Analysis of Phenomena in Fluid and Plasma Dynamics) (2018) (0)
In Memoriam (2019) (0)
The application of PVM to the computation of vortex sheet motion(Domain Decomposition Methods and Related Topics) (1997) (0)
Existence proof of unimodal solutions of the Proudman–Johnson equation via interval analysis (2019) (0)
Osmotic regulation in a halophilic Chlamydomonas cell. 3. Mg++ and Ca++ DEPENDent adenosine-triphosphatase in microsome fraction. (1968) (0)

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