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On vibration suppression of a tendon-driven soft robotic neck for the social robot HARU. [PDF]
Front Robot AIThorapalli Muralidharan S +2 more
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Experimental characterization and modeling of a new bulk multi-mode magnetostrictive actuator. [PDF]
Sci RepAnsari S, Karafi MR.
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Torsional Oscillations of the Sun
Science, 1985The sun's differential rotation has a cyclic pattern of change that is tightly correlated with the sunspot, or magnetic activity, cycle. This pattern can be described as a torsional oscillation, in which the solar rotation is periodically sped up or slowed down in certain zones of latitude while elsewhere the rotation remains essentially steady.
H B, Snodgrass, R, Howard
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Torsional Oscillations of the Sun
International Astronomical Union Colloquium, 1983AbstractA series of digitized synoptic observations of solar magnetic and velocity fields has been carried out at the Mount Wilson Observatory since 1967. In recent studies (Howard and LaBonte, 1980; LaBonte and Howard, 1981), the existence of slow, large-scale torsional (toroidal) oscillations of the Sun has been demonstrated.
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Arctic oscillation excitation by torsional oscillations
Atmospheric and Oceanic Optics, 2009The mechanism of the Arctic oscillation (AO) occurrence is yet to be explained. The work considers the hypothesis of external excitation of the AO by zonal wind variations over the range of 15–20 days. Such variations often occurring in the troposphere near the Pole propagate towards the low latitudes and the stratosphere induce the variations of the ...
V. I. Mordvinov +2 more
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Torsional Oscillators and Longitudinal Oscillators
2010Torsional vibrations in reciprocating engines historically were among the first problems of machine dynamics. They first occurred in marine engines and were calculated and measured by O. frahm as early as 1902. That type of research received a major boost by the demand for lightweight designs for airships and airplanes. In particular, the review of the
Hans Dresig, Franz Holzweißig
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Torsional oscillations in symmetrical structures
Applied Mathematical Modelling, 1984 A two-time perturbation technique is used to study the lateral and torsional motions of a nonlinear symmetrical structure subject to a lateral sinusoidal ground motion. It is shown that when the ground acceleration frequency is about one-third of or three times the natural frequency of the lateral motion, the symmetrical structure is particularly ...
J I Ramos
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The Matrix Theory of Torsional Oscillations
Journal of Applied Physics, 1942The general case of vibration of a shaft with several rotating masses is discussed. The analysis is reduced to a simple matrix multiplication of second-order matrices and the natural frequencies of symmetrical systems are discussed. The connection of the matrix method and the well-known Holzer method of computing the natural frequencies of torsional ...
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Torsional Oscillations of a Finite Disk
SIAM Journal on Applied Mathematics, 1981The manner in which the (double) boundary layer formed by a disk performing small amplitude, torsional oscillations reacts and adjusts to three types of discontinuity is studied.The first case considered is that of an infinitely thin disk torsionally oscillating in an infinite fluid.
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Helioseismic Measurement of Solar Torsional Oscillations
Science, 2002Bands of slower and faster rotation, the so-called torsional oscillations, are observed at the Sun's surface to migrate in latitude over the 11-year solar cycle. Here, we report on the temporal variations of the Sun's internal rotation from solar p-mode frequencies obtained over nearly 6 years by the Michelson Doppler Imager (MDI) instrument on board ...
Vorontsov, S.V. +4 more
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