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Topic: phase space

Seminar
1 seminar
ePoster
1 ePoster

In Applied Mathematics and Dynamical Systems

Seminar · Soft Matter

Exact coherent structures and transition to turbulence in a confined active nematic

Caleb Wagner · University of Nebraska-Lincoln

Mon, Feb 28, 2022 · 00:00 UTC

Active matter describes a class of systems that are maintained far from equilibrium by driving forces acting on the constituent particles. Here I will focus on confined active nematics, which exhibit especially rich flow behavior, ranging from structured patterns in space and time to disordered turbulent flows. To understand this behavior, I will take a deterministic dynamical systems approach, beginning with the hydrodynamic equations for the active nematic. This approach reveals that the infinite-dimensional phase space of all possible flow configurations is populated by Exact Coherent Struc

ePoster · Chaos Theory

Synaptic Upscaling Amplifies Chaotic Dynamics in Recurrent Networks of Rate Neurons

Farhad Razi, Fleur Zeldenrust · Bernstein Conference 2024

Increasing the strength of synaptic connections (synaptic upscaling) within networks of randomly connected neurons transitions the internal dynamics from stationary to a chaotic regime [1, 2]. Synaptic upscaling in neural networks improves learning speed, accuracy, and robustness [3] and enhances the dimensionality of internal dynamics in response to external stimuli [2], by boosting chaotic activity. Nonetheless, the direct link between synaptic upscaling, the dimensionality of the network activity, and and enhanced computational capacity of neural networks for learning tasks remains unclear.