Propagation of torsional Alfvén waves along magnetic flux tubes has been extensively studied for many years but no conclusive results regarding the existence of a cutoff frequency for these waves have been obtained. The main purpose of this paper is to derive new wave equations that describe the propagation of linear torsional Alfvén waves along thin and isothermal magnetic flux tubes, and use ...

We suggest that the global torsional oscillation of solar coronal loop may be observed by the periodical variation of a spectral line width. The amplitude of the variation must be maximal at the velocity antinodes and minimal at the nodes of the torsional oscillation. Then the spectroscopic observation as a time series at different heights above the active region at the solar limb may allow to ...

The double helical structure of DNA lends itself to topological constraints. Many DNA-based processes alter the topological state of DNA, generating torsional stress, which is efficiently relieved by topoisomerases. Maintaining this topological balance is crucial to cell survival, as excessive torsional strain risks DNA damage. Here, we review the mechanisms that generate and modulate DNA torsi...

Evaluation of entropy is important in biological processes in order to predict the stability of a molecular conformation. The entropy evaluation requires probabilistic modeling of conformations in the internal coordinates. Since fluctuations in the rotational (torsional) angle coordinates make a pivotal contribution to the overall configurational entropy of the molecule, we review circular prob...

The stress distribution in torsionally deformed cylindrical polycrystalline copper samples was investigated. The strain in torsional deformation changes with distance from the torsional axis and thus the local extent of work hardening and consequently the local flow stress changes as well. The variation of the flow stress with radial position in the samples was measured by microhardness tests. ...

The association of internuclear ophthalmoplegia (INO) with torsional nystagmus is rare. We report the case of a 63-year-old man presenting with sudden onset of diplopia. On ocular examination, he had left INO and a torsional nystagmus with counter-clockwise quick-phases from the patient's point of view in the primary position, ipsiversive to the side of the medical longitudinal fasciculus (MLF)...

Accurate prediction of the torsional barrier height in tolane is achieved by systematically extrapolating to the Dunning complete basis set limit at MP2 level with a spin-component-scaled correction. The zero-point energy correction is calculated at the B98/cc-pVDZ level based on a benchmark test using the experimental data for benzene. The final calculated barrier height is 202.2 cm, in excell...

TORSIONAL phacoemulsification represents a clear advance on traditional lens extraction modalities due to its enhanced efficiency, ease of use and robust safety profile, according to a number of investigators. Speaking at the XXIV Congress of the ESCRS, several surgeons highlighted the benefits of using the OZil torsional handpiece (Alcon) in their cataract procedures and suggested it will even...