Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"phase oscillators"”.
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Learning Emergent Gaits with Decentralized Phase Oscillators: on the role of Observations, Rewards, and Feedback
We present a minimal phase oscillator model for learning quadrupedal locomotion. Each of the four oscillators is coupled only to itself and its corresponding leg through local feedback of the ground reaction force, which we interpret as an observer feedback gain. The oscillator itself is …
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Synchronization of oscillatory networks in terms of global variables
Synchronization of large ensembles of oscillators is an omnipresent phenomenon observed in different fields of science like physics, engineering, life sciences, etc. The most simple setup is that of globally coupled phase oscillators, where all the oscillators contribute to a global field which …
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Oscillations in microvascular flow : their relationship to tissue oxygenation, cellular metabolic function and their diagnostic potential for detecting skin melanoma - clinical, experimental and theoretical investigations
… whilst the latter is modelled using coupled phase oscillators.
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Modeling phase synchronization of interacting neuronal populations : from phase reductions to collective behavior of oscillatory neural networks
… is hypothesized to underlie the concept of phase synchronization. Accordingly, phase models have found their way into neuroscience. The concepts of neural synchrony and oscillations are introduced in Chapter 1 and linked to phase synchronization phenomena in oscillatory neural networks. …
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Noise and delays in adaptive interacting oscillatory systems
… out for frequency- and radius-adapting HOPF oscillators. We then consider adapting the time scale and the shape of periodic signals. We also study how adaptive mechanisms can be implemented in heterogeneous networks formed by a couple of subnetworks, the first one with adaptive capability and …
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Synchronization in complex systems with multiple time scales
… of repetitive spikes followed by a quiescent phase. This system has been integrated numerically and analyzed with methods based on recurrence in phase space. An interesting result are the different transitions to synchrony found in the two distinct time scales. Moreover, an anomalous …
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Dynamics on networks
… the Kuramoto model, a canonical model of coupled phase oscillators. We obtain two results on its partial phase-locked state, where a subset of oscillators remain close in phase while others drift away. Firstly, we derive an analytical criterion for the finite-N model to guarantee the existence of …
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Dynamics and optimal control of information transmission in complex systems
… with the optimal control of synchronization of phase oscillators on static networks and spreading dynamics on time-varying networks. Here, the control inputs are time-varying coupling strengths and transmission probabilities, respectively, that apply uniformly across all interactions. Motivated …
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Loss of synchrony in an inhibitory network of type-I oscillators
… it is known that strong coupling can destabilize phase-locked firing. Here we examine the loss of synchrony caused by an increase in inhibitory coupling in networks of type-I Morris-Lecar model oscillators, which is characterized by a period-doubling cascade and leads to mode-locked states with …
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Controlling the collective dynamics in systems of active oscillators through geometry and hydrodynamic entrainment
… and so the steady state dynamics of the oscillators can be controlled using their positions. I study 'rower' oscillators, a highly simplified model for motile cilia that approximates each cilium by a rigid sphere that is driven by a geometrically updated force. The simplicity of the model …
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The Regulation of Segmentation Clock Period in Zebrafish
… core clockwork in individual cells, and these oscillators are coupled to each other by Delta-Notch intercellular signaling. The interaction of the segmentation clock with a posteriorly-moving arrest wavefront then translates the temporal information encoded by the clock into a spatial pattern …
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Complex regimes of synchronization
… as a general property of self-sustained oscillators to adjust their rhythm in the presence of an interaction. In this work we investigate complex regimes of synchronization phenomena by means of theoretical analysis, numerical modeling, as well as practical analysis of experimental data. …
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Pattern formation through synchronization in systems of nonidentical autonomous oscillators
… emerge when non-identical, diffusively coupled oscillators synchronize. It contains analytical results and their confirmation through extensive computer simulations. We use the Kuramoto model which reduces general oscillatory systems to phase dynamics. The symmetry of the coupling plays an …