The Analysis of thermomechanical periodic motions of a drinking bird

Uechi, Schun*; Uechi, Hiroshi*; Nishimura, Akihiko

World Journal of Engineering and Technology, 7(4), p.559 - 571, 2019/11

https://doi.org/10.4236/wjet.2019.74040

A water drinking bird is discussed in terms of a thermomechanical model. A mathematical expression of motion derived from the thermomechanical model of a drinking bird and numerical solutions are explicitly shown, which is helpful in understanding physical meanings and fundamental difference between mechanical and thermomechanical periodic motion. The mathematical and physical differences between mechanical and thermomechanical periodic motion. The process of a drinking bird motion could be applied to energy harvesting technology by way of the current modeling.

Bispectral analysis applied to coherent floating potential fluctuations obtained in the edge plasmas on JFT-2M

Nagashima, Yoshihiko*; Ito, Kimitaka*; Ito, Sanae*; Fujisawa, Akihide*; Hoshino, Katsumichi; Takase, Yuichi*; Yagi, Masatoshi*; Ejiri, Akira*; Ida, Katsumi*; Shinohara, Koji; et al.

Plasma Physics and Controlled Fusion, 48(4), p.S1 - S15, 2006/04

https://doi.org/10.1088/0741-3335/48/4/S01

This paper presents the results of bispectral analysis of floating potential fluctuations in the edge region of ohmically heated plasmas in the JFT-2M tokamak. Inside of the outermost magnetic surface,coherent modes were observed around the frequency of geodesic acoustic mode which is a kind of the zonal flow. The squared bicoherence shows significant nonlinear couplings between the coherent fluctuations and the background fluctuations (which are likely to contain drift wave turbulent fluctuations). The experimental results that the total bicoherence is proportional to the squared amplitude of the coherent fluctuation, and that the biphase of the coherent modes localizes around a constant value , are consistent with the theoretical prediction on the drift wave - zonal flow systems based on the Hasegawa-Mima model.

Performance evaluation of JAERI parallel numerical subroutine libraries using large scale structural analysis calculation

; Kaji, Yoshiyuki; ; ; ; Kaburaki, Hideo

Keisan Kogaku Koenkai Rombunshu, 3(1), p.59 - 62, 1998/05

no abstracts in English

The Development of parallel numerical library; Present status and some applied examples

; Kaji, Yoshiyuki; ; Kaburaki, Hideo

Gekkan Chikyu, 20(12), p.778 - 782, 1998/00

https://ci.nii.ac.jp/naid/40004227873

no abstracts in English

A User's manual of tools for error estimation of complex number matrix computation (Ver.1.0)

JAERI-Data/Code 97-011, 25 Pages, 1997/03

JAERI-Data-Code-97-011.pdf:0.8MB

no abstracts in English

Application of potential constants; Empirical determination of molecular energy components for diatomic molecules, III

Trends Chem. Phys., 1, p.21 - 30, 1990/00

no abstracts in English

Development and Adjustment of Progams for Solving Systems of Linear Equations; Development and Benchmark Test of SSL,No.4

JAERI-M 7553, 28 Pages, 1978/03

JAERI-M-7553.pdf:0.98MB

no abstracts in English

Computer Programs for Norlinear Algebraic Equations (Development and Benchmark Test of SSL,No.1)

JAERI-M 7335, 88 Pages, 1977/10

JAERI-M-7335.pdf:2.45MB

no abstracts in English