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Search Results: 1 - 10 of 622 matches for " Ueno "
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The Relationship between Athletic Abilities of Japanese High School Soccer Players and Their Psychological Skills in Both Athletic Club and School Life Settings  [PDF]
Kohei Ueno
Advances in Physical Education (APE) , 2014, DOI: 10.4236/ape.2014.42008
Abstract:

To examine the relationship between students’ athletic ability and their psychological skills in the athletic club and the school life setting, 99 players from high school soccer teams were administered with the Psychological Skills Inventory for Athletic Clubs and the Psychological Skills Inventory for School Life. Five coaches of the soccer teams evaluated the players’ athletic ability, using the Technique, Intelligence and Insight, Personality, and Speed (TIPS) evaluation framework. Structural equation modeling was conducted to test a series of structural models. Psychological skills in the school life setting have a direct effect on athletic ability. In addition, psychological skills in an athletic club setting have an indirect effect on athletic ability through psychological skills in the school life setting. In conclusion, the coach’s belief that players who have life skills and can control their daily life must have a high athletic ability was not wrong.

The Effect of Participation in a Game of Tag, an Activity Promoting Helping Behavior, on Children’s Helping Behavior-Related Self-Efficacy  [PDF]
Kohei Ueno
Advances in Physical Education (APE) , 2018, DOI: 10.4236/ape.2018.82021
Abstract: With a breakdown in classroom discipline, bullying and social withdrawal have become social problems in recent years; there is a heightened expectation toward physical education for developing proper social attitudes and cultivating morality. In this study, children were instructed to play “Nakama-oni (helping tag)”, a tag game variant promoting helping behavior through physical education. Thereafter, the frequency of helping behavior in Nakama-oni was checked, and the effect of participation in physical education through Nakama-oni on children’s helping behavior-related self-efficacy was discussed. Sixty elementary school children in the fifth grade played both Nakama-oni and normal tag. The results suggested that: 1) children experienced helping behavior more often in Nakama-oni, compared to normal tag; and 2) participation in Nakama-oni enhanced children’s helping behavior-related self-efficacy. In conclusion, results suggest that incorporating Nakama-oni that promotes helping behavior in physical education enhances children’s helping behavior-related self-efficacy.
Suppression of Methane Gas Emissions and Analysis of the Electrode Microbial Community in a Sediment-Based Bio-Electrochemical System  [PDF]
Yoshiyuki Ueno, Yoji Kitajima
Advances in Microbiology (AiM) , 2014, DOI: 10.4236/aim.2014.45032
Abstract:

The effects of bioelectrochemical systems (BESs) for the suppression of methane gas emissions from sediment were examined using a laboratory-scale reactor system. Methane gas emissions from acetate were suppressed by approximately 36% from control based on the installation of a BES in which carbon-graphite electrodes were buried in sediment and arbitrarily set at certain oxidative potentials (+300 mV vs Ag/AgCl) using a potentiostat. Meanwhile, methane gas emissions increased in the BES reactor where the electrode potential was set at -200 mV. Results obtained from pyrotag sequencing analysis of the microbial community on the surface of the buried electrodes targeting 16S rRNA genes demonstrated that the genusGeobacterhad drastically propagated in a sample from the reactor where the electrodes were buried. Quantitative analysis of 16S rRNA genes of archaea also revealed that the archaeal population had decreased to approximately 1/6 of its original level on the electrode of the BES set at +300 mV. This implied that the oxidation-reduction potential (ORP) in the sediment was raised to the inhibition level for methanogenesis in the vicinity of the buried electrode. Analysis of electron flux in the experiment revealed that electrons intrinsically used for methanogenesis were recovered via current generation in the sediment where a potential of +300 mV was set for the electrode, although most electrons donated from acetate were captured by oxygen respiration and other electron-accepting reactions. These results imply that BES technology is suitable for use as a tool for controlling re-dox-dependent reactions in natural environments, and that it also brought about changes in the microbial population structure and methanogenic activity in sediment.

Takano's Theory of Quantum Painleve Equations
Yuichi Ueno
Physics , 2008,
Abstract: Recently, a quantum version of Painleve equations from the point of view of their symmetries was proposed by H. Nagoya. These quantum Painleve equations can be written as Hamiltonian systems with a (noncommutative) polynomial Hamiltonian. We give a characterization of the quantum Painleve equations by certain holomorphic properties. Namely, we introduce canonical transformations such that the Painleve Hamiltonian system is again transformed into a polynomial Hamiltonian system, and we show that the Hamiltonian can be uniquely characterized through this holomorphic property.
Integrable Field Theories derived from 4D Self-dual Gravity
Tatsuya Ueno
Physics , 1995, DOI: 10.1142/S0217732396000588
Abstract: We reformulate the self-dual Einstein equation as a trio of differential form equations for simple two-forms. Using them, we can quickly show the equivalence of the theory and 2D sigma models valued in an infinite-dimensional group, which was shown by Park and Husain earlier. We also derive other field theories including the 2D Higgs bundle equation. This formulation elucidates the relation among those field theories.
BPS States in 10+2 Dimensions
Tatsuya Ueno
Physics , 1999, DOI: 10.1088/1126-6708/2000/12/006
Abstract: We discuss a (10+2)D N=(1,1) superalgebra and its projections to M-theory, type IIA and IIB algebras. From the complete classification of a second-rank central term valued in the so(10,2) algebra, we find all possible BPS states coming from this term. We show that, among them, there are two types of 1/2-susy BPS configurations; one corresponds to a super (2+2)-brane while another one arises from a nilpotent element in so(10,2).
Characteristics of the wavelength of ripples on icicles
K. Ueno
Physics , 2011, DOI: 10.1063/1.2775484
Abstract: It is known that the wavelength of the ripples on icicles in nature is of centimeter-scale. Such study on morphological instability of ice-water interface during ice growth from flowing supercooled water film with one side being a free surface has recently been made [K. Ueno, Phys. Rev. E 68, 021603 (2003)]. This is a first theoretical study taking into account the influence of the shape of the water-air surface on the growth condition of infinitesimal disturbances of the ice-water interface. A simpler formula to determine the wavelength of the ripples than that in the previous paper is derived. It seems that the wavelength of ripples is insensitive to the water supply rates, diameters of the icicles and surrounding air temperatures. The details of dependence of the wavelengh of ripples on these parameters are investigated.
General Solution of 7D Octonionic Top Equation
Tatsuya Ueno
Physics , 1998, DOI: 10.1016/S0375-9601(98)00407-1
Abstract: The general solution of a 7D analogue of the 3D Euler top equation is shown to be given by an integration over a Riemann surface with genus 9. The 7D model is derived from the 8D $Spin(7)$ invariant self-dual Yang-Mills equation depending only upon one variable and is regarded as a model describing self-dual membrane instantons. Several integrable reductions of the 7D top to lower target space dimensions are discussed and one of them gives 6, 5, 4D descendants and the 3D Euler top associated with Riemann surfaces with genus 6, 5, 2 and 1, respectively.
Pattern formation in crystal growth under parabolic shear flow II
K. Ueno
Physics , 2004, DOI: 10.1103/PhysRevE.69.051604
Abstract: Wavy pattern of ice with a specific wavelength occurs during ice growth from a thin layer of undercooled water flowing down the surface of icicles or inclined plane. In the preceding paper [K. Ueno, Phys. Rev. E {\bf 68}, 021603 (2003)], we have found that restoring forces due to gravity and surface tension is a factor for stabilization of morphological instability of the solid-liquid interface. However, the mechanism for the morphological instability and stability of the solid-liquid interface has not been well understood. In the present paper, it is shown that a phase difference between fluctuation of the solid-liquid interface and distribution of heat flux at the deformed solid-liquid interface, which depends on the magnitude of the restoring forces, is a cause of the instability and stability of the interface. This mechanism is completely different from the usual Mullins-Sekerka instability due to diffusion and stabilization due to the Gibbs-Thomson effect.
Pattern formation in crystal growth under parabolic shear flow
K. Ueno
Physics , 2003, DOI: 10.1103/PhysRevE.68.021603
Abstract: Morphological instability of the solid-liquid interface occuring in a crystal growing from an undercooled thin liquid being bounded on one side by a free surface and flowing down inclined plane is investigated by a linear stability analysis under shear flow. It is found that restoring forces due to gravity and surface tension is important factor for stabilization of the solid-liquid interface on long length scales. This is a new stabilizing effect different from the Gibbs-Thomson effect. A particular long wavelength mode of about 1 cm of wavy pattern observed on the surface of icicles covered with thin layer of flowing water is obtained from the dispersion relation including the effect of flow and restoring forces.
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