Results 231 to 240 of about 232,366 (268)

Rotating periodic solutions in complete degeneracy

Applied Mathematics Letters, 2022
In this paper, the authors study the existence of \(Q_0\)-rotating periodic solutions on a class of perturbed systems in \(\mathbb{R}^n\). This kind of rotating periodic solutions has the from of \(X(t+T)=Q_0X(t)\) \(\forall t\in \mathbb{R}\) with \(T>0\) and \(Q_0\) an orthogonal matrix.
Ying-Jia Guo, Xue Yang 0009
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The rotation period of Uranus

Nature, 1986
On 24 January 1986 the spacecraft Voyager 2 transversed the innermost magnetosphere of the planet Uranus, coming as close as 4.2 Uranus radii to the planet. It is pointed out that the magnetic field data provide a direct measure of the rotation period of the planet's interior, where the field is generated. Two period determinations are reported.
M. D. Desch, J. E. P. Connerney, M. L. Kaiser   +2 more
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The Relativistic Quantum Periodically Driven Rotator

Physica Scripta, 2003
Summary: The relativistic periodically driven quantum rotator problem is treated by solving the Dirac equation in the presence of the periodic S-function potential. The relativistic quantum mapping which describes the evolution of the wave function is derived.
Matrasulov, D. U., Milibaeva, G. M.
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Rotation of Load During the Prelift Period

Spine, 1991
Lifting is a major source of back injuries because of the mechanical effects on the spinal structures. A number of methods are known by which a lifter can reduce the load on the spine during lifting. This study explores an additional method: rotation of the load before it is actually lifted off the ground.
J H, Trafimow, G B, Andersson
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Jupiter's rotation period

Planetary and Space Science, 1967
Abstract The current belief that Jupiter's rotation period has recently lengthened by 0·8 sec is an error arising from a secular increase of duration of Jovian decametric storms. Periodograms based on the commencement time of decametric storms yield a constant period, 9 h 55 m 29·70 s ± 0·05 s.
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Lossless rotation transformations with periodic structure

IEEE International Conference on Image Processing 2005, 2005
Two-point lossless rotation transformations are used on realizing lossless DCTs or lossless orthogonal wavelet transforms. However, the two-point lossless rotation transformations based on the ladder network do not have high compatibility with their non-lossless versions.
Kunitoshi Komatsu, Kaoru Sezaki
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On the period of rotation of the sun

1889
reprinted from the Haverford College ...
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Uranus' rotational period

Icarus, 1977
A modified spectroscopic technique was applied to determine the rotational period of Uranus and the orientation of the projected spin axis of the planet. The method consists in obtaining a series of spectra for both a nonrotated planet disk and for a disk rotated 180 degrees.
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On the Stability of Periodic Mercury-type Rotations

Regular and Chaotic Dynamics, 2017
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Churkina, Tatyana E., Stepanov, Sergey Y.   +1 more
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PERIODICITY AND RECURRENCE IN PIECEWISE ROTATIONS OF EUCLIDEAN SPACES

International Journal of Bifurcation and Chaos, 2004
We consider the behavior of piecewise isometries in Euclidean spaces. We show that if n is odd and the system contains no orientation reversing isometries then recurrent orbits with rational coding are not expected. More precisely, a prevalent set of piecewise isometries do not have recurrent points having rational coding.
Mendes, Miguel, Nicol, Matthew
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