Kyoto University of Education
Kyoto, Japan

Kyoto University of Education is a national university at Kyoto, Kyoto, Japan. The predecessor of the school was founded in 1876, and it was chartered as a university in 1949. Wikipedia.

Time filter

Source Type

Gotoh K.,Nara Women's University | Yasukawa A.,Nara Women's University | Taniguchi K.,Kyoto University of Education
Journal of Adhesion Science and Technology | Year: 2011

The poly(ethylene terephthalate), PET, film was exposed to atmospheric pressure plasma under various plasma processing parameters. The wettability of the PET film immediately after the exposure and after storage in air, which was determined by the sessile drop method, was strongly dependent on the plasma processing parameters. The contact angle hysteresis on the plasma-exposed PET film was examined by the Wilhelmy method. It was found that the hydrophobic recovery of the PET surface on storage after the plasma exposure was observed only for the advancing contact angle and that the receding angle remained almost the same. These experimental findings were explained on the basis of the calculation by Johnson and Dettre for the advancing and receding contact angles on model heterogeneous surfaces. © 2011 VSP.

Nakajima K.-I.,Kyoto Prefectural University of Medicine | Niisato N.,Kyoto Prefectural University of Medicine | Niisato N.,Kyoto University of Education | Marunaka Y.,Kyoto Prefectural University of Medicine | Marunaka Y.,Kyoto University of Education
Cellular Physiology and Biochemistry | Year: 2011

We have recently reported that Na +/K +/2Cl - cotransporter isoform 1 (NKCC1) plays an essential role in nerve growth factor (NGF)-induced neurite outgrowth in PC12D cells. On the other hand, it has been reported that dietary flavonoids, such as quercetin, apigenin, and luteolin, stimulate various ion transporters. In the present report, we investigated the effect of quercetin, a flavonoid, on NGF-induced neurite outgrowth in PC12 cells (the parental strain of PC12D cells). Quercetin stimulated the NGF-induced neurite outgrowth in a dose-dependent manner. Knockdown of NKCC1 by RNAi methods abolished the stimulatory effect of flavonoid. Quercetin stimulated NKCC1 activity (measured as bumetanide-sensitive 86Rb influx) without any increase in the expression level of NKCC1 protein. The stimulatory effect of quercetin on neurite outgrowth was dependent upon extracellular Cl -. These observations indicate that quercetin stimulates the NGF-induced neurite outgrowth via an increase in Cl - incorporation into the intracellular space by activating NKCC1 in PC12 cell. © 2011 S. Karger AG, Basel.

Marunaka Y.,Kyoto Prefectural University of Medicine | Marunaka Y.,Kyoto University of Education
Journal of Pharmacological Sciences | Year: 2014

Epithelial Na+ transport participates in control of various body functions and conditions: e.g., homeostasis of body fluid content influencing blood pressure, control of amounts of fluids covering the apical surface of alveolar epithelial cells at appropriate levels for normal gas exchange, and prevention of bacterial/viral infection. Epithelial Na+ transport via the transcellular pathway is mediated by the entry step of Na+ across the apical membrane via Epithelial Na+ Channel (ENaC) located at the apical membrane, and the extrusion step of Na+ across the basolateral membrane via the Na+,K+-ATPase located at the basolateral membrane. The rate-limiting step of the epithelial Na+ transport via the transcellular pathway is generally recognized to be the entry step of Na+ across the apical membrane via ENaC. Thus, up-/down-regulation of ENaC essentially participates in regulatory systems of blood pressure and normal gas exchange. Amount of ENaC-mediated Na+ transport is determined by the number of ENaCs located at the apical membrane, activity (open probability) of individual ENaC located at the apical membrane, single channel conductance of ENaC located at the apical membrane, and driving force for the Na+ entry via ENaCs across the apical membrane. In the present review article, I discuss the characteristics of ENaC and how these factors are regulated. © The Japanese Pharmacological Society.

Bonatti C.,Institute Of Mathematiques Of Bourgogne | Diaz L.J.,Pontifical Catholic University of Rio de Janeiro | Kiriki S.,Kyoto University of Education
Nonlinearity | Year: 2012

We consider diffeomorphisms f with heteroclinic cycles associated with saddles P and Q of different indices. We say that a cycle of this type can be stabilized if there are diffeomorphisms close to f with a robust cycle associated with hyperbolic sets containing the continuations of P and Q. We focus on the case where the indices of these two saddles differ by one. We prove that, excluding one particular case (so-called twisted cycles that additionally satisfy some geometrical restrictions), all such cycles can be stabilized. © 2012 IOP Publishing Ltd & London Mathematical Society.

Tada H.,Kyoto University of Education
Proceedings - 2011 10th International Symposium on Autonomous Decentralized Systems, ISADS 2011 | Year: 2011

In this paper, we consider distributed task allocation in distributed systems. In order to improve the performance, using load information of nodes is promising. In reality, however, it is common that load information is not up to date when it is used. Load information may be updated only periodically, or the communication delay for a task to move to other node makes load information out of date. The performance of task allocation schemes is significantly damaged if the load information is old. In order to tackle this problem, we introduce the nearest neighbor approach which is originally proposed for parallel computing. Restricting the communication to between neighboring nodes, the effect of communication delay is suppressed. Simulation results showed that our proposed scheme suppresses the effect of old load information and shows better performance than a previously proposed scheme.

Colli P.,University of Pavia | Fukao T.,Kyoto University of Education
Mathematical Methods in the Applied Sciences | Year: 2015

The Allen-Cahn equation, coupled with dynamic boundary conditions, has recently received a good deal of attention. The new issue of this paper is the setting of a rather general mass constraint, which may involve either the solution inside the domain or its trace on the boundary. The system of nonlinear partial differential equations can be formulated as a variational inequality. The presence of the constraint in the evolution process leads to additional terms in the equation and the boundary condition containing a suitable Lagrange multiplier. A well-posedness result is proved for the related initial value problem. © 2014 John Wiley & Sons, Ltd.

Yokoyama T.,Kyoto University of Education
Journal of Dynamical and Control Systems | Year: 2015

Consider the set (Formula presented.) of non-wandering continuous flows on a closed surface M. Then we show that such a flow can be approximated by a non-wandering flow v such that the complement M−Per(v) of the set of periodic points is the union of finitely many centers and finitely many homoclinic saddle connections. Using the approximation, the following are equivalent for a continuous non-wandering flow v on a closed connected surface M: (1) the non-wandering flow v is topologically stable in (Formula presented.); (2) the orbit space M/v is homeomorphic to a closed interval; (3) the closed connected surface M is not homeomorphic to a torus but consists of periodic orbits and at most two centers. Moreover, we show that a closed connected surface has a topologically stable continuous non-wandering flow in (Formula presented.) if and only if the surface is homeomorphic to either the sphere (Formula presented.), the projective plane (Formula presented.), or the Klein bottle (Formula presented.). © 2015 Springer Science+Business Media New York

Tsuda M.,Kyoto University of Education | Kuroda Y.,Kyoto University of Education
Doctoral Student Consortium (DSC) - Proceedings of the 23rd International Conference on Computers in Education, ICCE 2015 | Year: 2015

This is a comparative study of the Japanese and East Asian use of information and communication technology (ICT) in mathematics education. In Japan, the concern with ICT has been growing for the last several years. The question we ask here is what should be done to use ICT more effectively in mathematics education. We investigated the mathematics textbooks used in East Asian countries. The investigation showed that in Singapore and Vietnam, function calculators are used effectively beginning in elementary school. Japanese textbooks have to be treated reality values. If students treat reality values they need to use a calculator. There is a possibility to expand applied mathematics in the field.

Kiriki S.,Kyoto University of Education | Soma T.,Tokyo Metroplitan University
Nonlinearity | Year: 2012

In this paper, we give sufficient conditions for the existence of C 2 robust heterodimensional tangency, and present a non-empty open set in Diff 2(M) with dim M3 each element of which has a non-degenerate heterodimensional tangency on a C 2 robust heterodimensional cycle. © 2012 IOP Publishing Ltd & London Mathematical Society.

Gotoh K.,Kyoto University of Education
Textile Research Journal | Year: 2010

In order to obtain a criterion of liquid cleaning power, a textile washing test was carried out in water and various organic solvents. Cotton and polyester clothes soiled with particulate, oily and water-soluble contaminants were used. The soiled clothes were cleaned in various liquids with stirring and the detergency was evaluated from the change in the surface reflectance of the soiled cloth due to cleaning. The detergency was largely dependent on contaminant, cloth and liquid species, and showed good agreement with common and well-known knowledge about textile washing; the particulate contaminant was difficult to remove in any liquid. In contrast, the oily and water-soluble contaminants were readily removable in the organic solvents and water, respectively. By adding alkali and surfactant to water, the removal of any contaminant considerably increased. In comparison with the stirring, the ultrasonic washing was carried out with the aqueous solutions, but unexpectedly the detergency of most soiled clothes did not increase. For any artificially soiled clothes, a certain relation was successively found between the detergency and the relative dielectric constant. © The Author(s), 2010.

Loading Kyoto University of Education collaborators
Loading Kyoto University of Education collaborators