J-GLOBAL         Last updated: Nov 7, 2019 at 19:49
Ochanomizu University
Faculty of ScienceDivision of Physics
Job title
Research funding number

Research Areas


Published Papers

Takako Tomizawa, Ko Okumura
Polymer Journal      Sep 2019   [Refereed]
Yuko Aoyanagi, Ko Okumura
Polymer   121648   Jul 2019   [Refereed]
Takako Tomizawa, Ko Okumura
Polymer   173 166   May 2019   [Refereed]
Midori Isobe, Ko Okumura
Journal of the Physical Society of Japan   88(2) 025001   Feb 2019   [Refereed]


K. Okumura
Physical Review B   52 13358-13367   Jan 1995
The self-consistent renormalization theory of the itinerant electron model was the first theory to show that the Curie-Weiss behavior of the magnetic susceptibility is not peculiar to the localized model. But the theory was justified on the basis ...
Yuko Aoyanagi, Ko Okumura
Physical Review Materials   3    May 2019
© 2019 American Physical Society. Recently, it has been found experimentally that hydrated nacre exhibits a nonlinear mechanical response. While mechanical nonlinearity has been shown to be important in other biological structures, such as spider ...
K. Okumura
Journal of Magnetism and Magnetic Materials   140-144 191-192   Jan 1995
The susceptibility is studied by the inversion method, which advances the Stoner theory systematically. This is because the method is a kind of perturbation theory and its first order calculation reproduces the mean-field theory. The second order ...
Hana Nakazato, Yuki Yamagishi, Ko Okumura
Physical Review Fluids   3    May 2018
© Published by the American Physical Society 2018. In hydrodynamic topological transitions, one mass of fluid breaks into two or two merge into one. For example, in honey-drop formation when honey is dripping from a spoon, honey is extended to sep...
K. Okumura, R. Fukuda
Physical Review E   47 1486-1498   Jan 1993
Using the field-theoretical formalism, nonequilibrium thermodynamics is discussed where the volume V(t) is changing with time. The time-dependent boundary condition on the wave function is handled by introducing the time-independent mode variables...

Research Grants & Projects

Soft matter physics of composite materials
Project Year: 1999   
Soft matter physics of capillarity
Project Year: 2002   
Multi-dimensional laser spectroscopy
Project Year: 1995   
Soft mater physics of gels
Project Year: 2002