@article{RuedigerKueker2021,
  author    = {R{\"u}diger, G{\"u}nther and K{\"u}ker, Manfred},
  title     = {Angular momentum transport by magnetoconvection and the magnetic modulation of the solar differential rotation},
  series = {Astronomy and astrophysics : an international weekly journal / European Southern Observatory (ESO)},
  volume    = {649},
  journal   = {Astronomy and astrophysics : an international weekly journal / European Southern Observatory (ESO)},
  publisher = {EDP Sciences},
  address   = {Les Ulis},
  issn      = {1432-0746},
  doi       = {10.1051/0004-6361/202039912},
  pages     = {10},
  year      = {2021},
  abstract  = {In order to explain the variance of the solar rotation law during the activity minima and maxima, the angular momentum transport by rotating magnetoconvection is simulated in a convective box penetrated by an inclined azimuthal magnetic field. Turbulence-induced kinetic and magnetic stresses and the Lorentz force of the large-scale magnetic background field are the basic transporters of angular momentum. Without rotation, the sign of the magnetic stresses naturally depends on the signs of the field components as positive (negative) B theta B phi transport the angular momentum poleward (equatorward). For fast enough rotation, however, the turbulence-originated Reynolds stresses start to dominate the transport of the angular momentum flux. The simulations show that positive ratios of the two meridional magnetic field components to the azimuthal field reduce the inward radial as well as the equatorward latitudinal transport, which result from hydrodynamic calculations. Only for B theta B phi>0 (generated by solar-type rotation laws with an accelerated equator) does the magnetic-influenced rotation at the solar surface prove to be flatter than the nonmagnetic profile together with the observed slight spin-down of the equator. The latter phenomenon does not appear for antisolar rotation with polar vortex as well as for rotation laws with prevailing radial shear.},
  language  = {en}
}
@article{WacheMcCarthyRisseetal.2015,
  author    = {Wache, Remi and McCarthy, Denis N. and Risse, Sebastian and Kofod, Guggi},
  title     = {Rotary Motion Achieved by New Torsional Dielectric Elastomer Actuators Design},
  series = {IEEE ASME transactions on mechatronics},
  volume    = {20},
  journal   = {IEEE ASME transactions on mechatronics},
  number    = {2},
  publisher = {Inst. of Electr. and Electronics Engineers},
  address   = {Piscataway},
  issn      = {1083-4435},
  doi       = {10.1109/TMECH.2014.2301633},
  pages     = {975 -- 977},
  year      = {2015},
  abstract  = {This paper reports a new way to produce a rotation motion actuated by dielectric elastomer actuators. Two specific electrode designs have been developed and the rotation of the actuator centers has been demonstrated and measured. At low strains, the rotation shows a nearly quadratic dependence with the voltage. This behavior was used to compare the performances between the two proposed designs. Among the tested configurations, a maximal rotation of 10 degrees was achieved.},
  language  = {en}
}