Results 231 to 240 of about 63,875 (265)

Rotational mode in 123 oxide

Ferroelectrics, 1990
Abstract Attention is drawn to the ferroelectric features of the 123 oxide systems at ambient temperatures. In analogy with Tetragonal Tungsten Bronze (TTB) ferroelectrics, such features are explained on the basis of a phenomenological model of rotational mode and its coupling to one of the low frequency lattice vibrational mode.
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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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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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Mode generators for high order rotating gyrotron modes

25th International Conference on Infrared and Millimeter Waves (Cat. No.00EX442), 2002
In order to cold test the performance of quasi-optical mode converters of gyrotrons, high order gyrotron cavity modes have to be excited at low power levels. There are several approaches to generate such modes. One is to use combined sections of periodically-perturbed-waveguide-wall converters, which step-wise convert from fundamental to high order ...
D. Wagner, M. Blank, T.S. Chu, K. Felch, M. Mizuhara, W. Kasparek   +5 more
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Topology of the Mode Rotation in Two-mode Optical Fiber

13th International Conference on Fiber Optics and Photonics, 2016
We investigate the effect of asymmetric propagation of light wave in two-mode fiber by breaking symmetry of propagation vectors with an off-axis excitation. Spatial mode rotation is observed for an azimuthal variation in launching conditions.
Pradeep C. Tagavula, Dinesh N. Naik, Nirmal K. Viswanathan   +2 more
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Modes of a rotating dielectric waveguide

Optics and Spectroscopy, 2003
Proceeding from the Maxwell differential equations and the Minkowski constitutive equations of the first order with respect to the ratio of the velocity of motion of a medium to the velocity of light in a vacuum, we derived equations for determining the mode structure of a field in a linear isotropic medium with an axially symmetric distribution of the
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Compton spectroscopy for rotation-mode computed tomography

Journal of X-Ray Science and Technology: Clinical Applications of Diagnosis and Therapeutics, 2012
In computed tomography (CT) systems, it is desirable to know the X-ray energy spectra for various applications, including medical CT imaging, and diagnostic field and heavy ion therapy. However, because of the restricted space, the only practical solution is to use Compton spectroscopy, where the incident spectrum is inferred from the scattered ...
Mohammadi, A, Baba, M, Nakhostin, M, Ohuchi, H, Abe, M   +4 more
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Differential Rotation of R-Modes

AIP Conference Proceedings, 2006
Recent work has shown that differential rotation, producing large scale drifts of fluid elements along stellar latitudes, is an unavoidable feature of r‐modes. We discuss the role of this differential rotation in the evolution of the r‐mode instability of newly born, hot, rapidly rotating neutron stars.
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Shocks Associated with Rotational Modes

1991
Many interesting systems of conservation laws in several space variables are isotropic in the sense of equivariance under rotations acting on the spatial components of the independent variable and on appropriate components of the state variable (e.g.
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Rotation and improved confinement modes

Plasma Physics and Controlled Fusion, 1994
The hypothesis that fluctuation levels and anomalous transport in tokamaks are suppressed by radial shear in E*B rotation is reviewed, with emphasis on the L- to H-mode transition. At present there is no unambiguous experimental support for the hypothesis and further work with better space and time resolution is required.
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