Ekkehard Ullner

TL;DR: It is shown that phase-repulsive coupling eliminates oscillations in a population of synthetic genetic clocks, and an experimentally feasible synthetic genetic network that contains phase repulsively coupled repressilators with broken temporal symmetry is proposed.

TL;DR: In this article, it was shown that an optimal amplitude of the high-frequency driving enhances the response of an excitable system to a low-frequency signal, and that this effect can be extended to spatially extended excitable media, taking the form of an enhanced propagation of the lowfrequency signal.

TL;DR: An experimentally feasible synthetic genetic network consisting of two phase repulsively coupled repressilators, which evokes multiple coexisting stable attractors with different features, is investigated, which performs a bifurcation analysis to determine and classify the dynamical structure of the system.

TL;DR: This work systematically investigates the dynamical behavior of a population of synthetic genetic oscillators coupled by chemical means and shows that dynamical clustering is a generic property of multicellular systems and argues that such clustering might provide a basis for functional differentiation and variability in biological systems.

TL;DR: In systems which combine both oscillatory and excitable properties, and hence intrinsically possess two internal frequencies, the effect of stochastic resonance can be amplified by application of an additional high-frequency signal, which is in resonance with the oscillatory frequency.