Filtern
Erscheinungsjahr
- 2010 (90) (entfernen)
Dokumenttyp
- Wissenschaftlicher Artikel (69)
- Dissertation (19)
- Monographie/Sammelband (2)
Gehört zur Bibliographie
- ja (90) (entfernen)
Schlagworte
- Aerosol (1)
- Arctic (1)
- Arktis (1)
- Cascading (1)
- Chaotische Oszillationen (1)
- Chemie-Transport-Modell (1)
- Compacton (1)
- Dynamik (1)
- EOF (1)
- Eisen (1)
Institut
- Institut für Physik und Astronomie (90) (entfernen)
Hysteresis in the pinning-depinning transitions of spiral waves rotating around a hole in a circular shaped two- dimensional excitable medium is studied both by use of the continuation software AUTO and by direct numerical integration of the reaction-diffusion equations for the FitzHugh-Nagumo model. In order to clarify the role of different factors in this phenomenon, a kinematical description is applied. It is found that the hysteresis phenomenon computed for the reaction-diffusion model can be reproduced qualitatively only when a nonlinear eikonal equation (i.e. velocity- curvature relationship) is assumed. However, to obtain quantitative agreement, the dispersion relation has to be taken into account.