Results 11 to 20 of about 278,740 (250)

Cracking Strange Stars by Torsional Oscillations

open access: yesUniverse, 2018
Strange stars are one of the possible compact stellar objects formed in the core collapse of supernovae. These hypothetical stars are made by deconfined quark matter and are selfbound.
Francesco Tonelli, Massimo Mannarelli
doaj   +2 more sources

Self-oscillations in nonlinear torsional metamaterials [PDF]

open access: yesNew Journal of Physics, 2013
We study the nonlinear dynamics of torsional meta-molecules—sub-wavelength resonators with strong coupling between electromagnetic excitation and rotational deformation—and show that such structures may undergo self-oscillations.
M Liu   +4 more
doaj   +2 more sources

Nonlinear torsional oscillations in rotating systems

open access: yesPhysical Review Letters, 2007
Torsional oscillations, temporal variations in the differential rotation in rotating systems, are a well-established phenomenon in the fluid regions of convective stars and planets.
Zhang, K., Chang, Y., Liao, X.
core   +3 more sources

Torsional oscillations of strange stars [PDF]

open access: yesEPJ Web of Conferences, 2014
Strange stars are one of the hypothetical compact stellar objects that can be formed after a supernova explosion. The existence of these objects relies on the absolute stability of strange collapsed quark matter with respect to standard nuclear matter ...
Mannarelli Massimo
doaj   +3 more sources

Torsional vibration analysis of automotive drivelines [PDF]

open access: yes, 1997
One of the most important source of noise and vibrations associated with vehicles is the vibration of driveline systems. Such phenomena are subjectively associated with customer complaints.
Rabeih, El-Adl Mohammed Aly
core   +7 more sources

A NOTE ON THE TORSIONAL OSCILLATION AT SOLAR MINIMUM [PDF]

open access: yesThe Astrophysical Journal, 2009
We examine the evolution of the zonal flow pattern in the upper solar convection zone during the current extended solar minimum, and compare it with that during the previous minimum. The results suggest that a configuration matching that at the previous minimum was reached during 2008, but that the flow band corresponding to the new cycle has been ...
Howe, Rachel   +5 more
openaire   +4 more sources

DYNAMIC SCALAR TORSION AND AN OSCILLATING UNIVERSE [PDF]

open access: yesModern Physics Letters A, 2007
For the Poincaré gauge theory of gravity we consider the dynamical scalar torsion mode in a cosmological context. We explore in particular the possibility of using dynamical torsion to explain the current state of the accelerating Universe. With certain suitable sets of chosen parameters, this model can give a (qualitatively) proper description of the
Yo, Hwei-Jang, Nester, James M.
openaire   +2 more sources

Robust Power Designing of Supplementary Damping Controller in VSC HVDC System to Improve Energy Conversion Efficiency of Wind Turbine and Power System Stability

open access: yesJournal of Electrical and Computer Engineering, 2022
Because of low losses and voltage drop, fast control of power, limitless connection distance, and isolation issues, using high-voltage direct-current (HVDC) transmission system is recommended to transfer power in the power systems, including wind farms ...
A. Hamidi   +3 more
doaj   +1 more source

Torsional oscillations of magnetized relativistic stars [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2001
Strong magnetic fields in relativistic stars can be a cause of crust fracturing, resulting in the excitation of global torsional oscillations. Such oscillations could become observable in gravitational waves or in high-energy radiation, thus becoming a tool for probing the equation of state of relativistic stars.
Messios, Neophytos   +2 more
openaire   +2 more sources

Fuzzy based battery energy storage system and braking resistor for mitigation of shaft-torsional oscillations

open access: yesJournal of King Saud University: Engineering Sciences, 2021
Autoreclosure is an irreplaceable protective scheme that was initially engineered for power system stability enhancement especially in areas with high isokeraunic levels.
Mohamed Fayez Ahmed   +3 more
doaj   +1 more source

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