INPE
Eventos e Notícias
2013
- 21 a 27 de outubro
Workshop e Escola no Brasil, Ribeirão Preto, SP
- 07 a 12 de setembro
Worshop and School na Alemanha
- 7 de julho
Videoconferência - palestra de J.P. Pade
Jan Philipp Pade (Humboldt-Universität zu Berlin, Project 1)
- 05 de Maio de 2013
Videoconferência - palestra de J. Kromer
Justus Kromer (Humboldt-Universität zu Berlin, Project 7)
Title: A dynamical approach on using signatures of canonical bursting model neurons to explain circuit connectivity in biological CPGs.
We investigate the effect of network connectivity on neural signatures in the central pattern generator (CPG) of the blue crab's stomatogastric ganglion. Neural signatures contain information about the interspike interval correlations of bursting neurons and are, therefore, strongly connected to the bifurcations the neuron undergoes when switching from resting to spiking state. Using the corresponding canonical models, we are able to show how circuit connectivity changes these bifurcations and, consequently, influences fundamental properties like the neuron's type of bursting or it's excitability. These results give new insight in the role of individual synaptic connections in CPGs.
- 4 de abril de 2013
Videoconferênce - palestra de: Dr. M. Högele
Dr. Michael Högele (Universität Potsdam, Project 18)
Title: The fi rst exit problem for Gaussian and non-Gaussian Lévy diff usions motivated by paleoclimate data
The first exit problem (FEP) for (Gaussian and non-Gaussian) Lévy diff usions from a vicinity of a stable state at small noise intensity provides important conceptual insight in paleoclimatic climate fluctuations. A prominent example are & alpha-stable di ffusions which arise in the statistical analysis of time series of the last glacial period, both in the physical and in the mathematical literature. After a climatological motivation, we will explain the notion and basic features of (Gaussian and non-Gaussian) Lévy processes and diff usions and adress the corresponding FEP. In the Gaussian case the first exit problem is well-known for a long time and we will review it briefly. The case of finite-dimensional systems with additive and multiplicative non-Gaussian Lévy noise was studied in the last years by Imkeller, Pavlyukevich and collaborators and by Debussche, Högele and Imkeller for non-linear reaction diff usion equations, such as the Chafee-Infante equation. In this talk we will present a general result about the asymptotic first exit time problem of regularly varying Lévy diff usions to leave the vicinity of a global attractor and compare it to the Gaussian case. This is joint work with I. Pavlyukevich, FSU Jena. - 21-23 de março de 2013
Conference: Nonliear Data Analysis and Modeling
Title: From rings of oscillators to pattern recognition
The aim of this talk is to establish a pattern recognition scheme by using time delayed rings of phase oscillators. After presenting some properties of unidirectional rings it is shown how the introduction of time delays enables us to generate arbitrary firing patterns. We conclude by showing how system's properties could be used to encode and recognize patterns.
Instituições participantes:
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