Results 221 to 230 of about 63,574 (265)

Mode Identification of a Rotating Disk

Experimental Mechanics, 1998
A modal testing method permitting identification of the natural frequencies, the number of nodal diameters and wave motions in a rotating disk is presented in this paper. This method is applicable at arbitrary rotation speed without requiring a priori information about the vibration modes of the stationary disk.
T. K. Ahn, C. D. Mote
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Stability of ballooning modes in a rotating plasma

Physical Review A, 1990
An equation describing ballooning modes localized to a magnetic field line embedded in rotating plasma is derived and analyzed. On a typical ballooning growth time these modes may be completely stabilized by shear in the flow, in a way which appears to be simple to achieve experimentally. Their long-time behavior is more complicated.
, Hameiri, , Chun
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Three-Mode Orthomax Rotation

Psychometrika, 1997
Factor analysis and principal components analysis (PCA) are often followed by an orthomax rotation to rotate a loading matrix to simple structure. The simple structure is usually defined in terms of the simplicity of the columns of the loading matrix. In Three-mode PCA, rotational freedom of the so called core (a three-way array relating components for
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Spontaneous mode rotation in RFX

Plasma Physics and Controlled Fusion, 2005
A statistical analysis of spontaneous mode rotations in the reversed field experiment (RFX) reversed field pinch is presented. These rotations involve only m = 1 toroidal magnetic field fluctuations with a velocity that is found to be smaller than that of the fluid motion and in the opposite direction. In RFX magnetic fluctuations are mainly present as
D Terranova, T Bolzonella, S C Guo
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Vibrational modes of a rotating string

Canadian Journal of Physics, 1998
Motivated by nonrelativistic models of a QCD (quantum chromodynamic) string, we examine the systemof a nonrelativistic string in uniform rotational motion with one endfixed and with a mass (quark) attached to the other end. A QCD string hasno purely longitudinal modes, so some constraint must be imposed upon thenonrelativistic system to exclude these ...
T.J. Allen, J.R. Schmidt
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Normal modes of synchronous rotation

Icarus, 2005
The dynamics of synchronous rotation and physical librations are revisited in order to establish a conceptually simple and general theoretical framework applicable to a variety of problems. Our motivation comes from disagreements between the results of numerical simulations and those of previous theoretical studies, and also because different ...
F VARADI, S MUSOTTO, W MOORE, G SCHUBERT
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Molecular rotations and local modes

The Journal of Chemical Physics, 1994
Rotational energy level structures of stretching vibrational states have been investigated in the XH2, XH3, and XH4 type symmetrical hydrides. Transformations from standard vibration–rotation normal coordinate Hamiltonians are made to internal coordinate representations which explicitly give the terms responsible for rotational coupling between the ...
Tuomas Lukka, Lauri Halonen
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Design of a rotating mode filter

Proceedings International University Conference 'Electronics and Radiophysics of Ultra-High Frequencies' (Cat. No.99EX356), 2003
The solution of the electromagnetic field is given for the TE mode in infinite fan-shaped waveguides. The basic principle of a rotating mode filter with a fan-shaped waveguide is presented. The design method for the filter is discussed by a practical example. The good experiment results for the filter are achieved for TE/sub 03/ mode operation.
null Luo Jirun, null Zhang Shichang, null Ding Yaogen, null Song Wenmiao   +3 more
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The Earth's rotational modes revisited

Geophysical & Astrophysical Fluid Dynamics, 2022
In the conventional treatment of the Earth’s rotational dynamics using the Earth’s angular momentum description (AMD) it is customary to assume that the velocity/displacement of a mass element in the liquid core (LC) has a rigid rotation and a displacement components in addition to the uniform (solid-body) rotation. This makes for a very complex set of
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Rotation and mode locking in tokamaks

Physica Scripta, 1989
The nonlinear mode coupling problem for a single resistive tearing mode as a possible explanation for the phenomenon of mode locking in Tokamaks is considered. The analysis is close to previous work by Nave and Wesson [1] and the purpose of this work is to clarify some of the issues brought forward by these authors.
G Berge, L K Sandal, J A Wesson
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