Namur Institute For Complex Systems

Ryota Kobayashi (NII, Tokyo): Inferring synaptic connections from spike data of multiple neurons
2017-03-21 11:00 - 12:00 (Europe/Paris)
Inferring synaptic connections from spike data of multiple neurons:
Abstract: Correlations in electric activity among neurons are defined as “functional connections”. It is still unclear how the functional connectivity is related to underlying (physiological) synaptic connectivity. Here, we develop a method for estimating synaptic connections from spike data of multiple neurons. Estimation performance of the proposed method was evaluated by using simulated data generated by a realistic cortical network model (Kitano & Fukai, 2007). This is joint work with Katsunori Kitano.
The meeting will take place at 11H00 in the 4th floor, Room Camille Joset (401).

Malbor Asllani (FNRS & NaXys)
2017-03-14 13:00 - 14:00 | Seminar room, Rempart de la Vierge 8, Namur, 1170
Title: Desynchronization of the Kuramoto oscillators. A neurostimulation method for controlling epilepsy seizures

Abstract:
Many coordination phenomena are based on a synchronization process, whose global behavior emerges from the interactions among the individual parts. Often in nature, such self-organized mechanism allows the system to behave as a whole and thus grounding its very first existence, or expected functioning, on such process. There are however cases where synchronization acts against the stability of the system; for instance in some neurodegenerative diseases or epilepsy or the famous case of Millennium Bridge where the crowd synchronization of the pedestrians seriously endangered the stability of the structure. In this talk we propose an innovative control method to tackle the synchronization process based on the application of the Hamiltonian control theory, by adding a small control term to the system we are able to impede the onset of the synchronisation. We illustrate the effectiveness of our method applying it to control the epileptic seizures.

Introduction to GIT
2017-03-09 08:00 - 17:00 | Namur
Contact Frederik de Laender (frederik.delaender@unamur.be) for details.
Registration is free, but mandatory on: http://doodle.com/poll/bdq4aetpkk6kav9w
Precise schedule to be confirmed.

Seminar of Melaine Saillenfest
2017-02-07 13:00 - 14:00 | Seminar room, Rempart de la Vierge 8, Namur, 1170
Affiliations: IMCCE – Observatoire de Paris and Dipartimento di Matematica – Università di Pisa
Titre : Secular representations for the long-term dynamics beyond Neptune
Abstract: I will present the development and the application of semi-analytical secular models, designed to describe generically the long-term dynamics of transneptunian objects. One-degree-of-freedom systems are obtained in both the non-resonant and resonant cases, allowing to represent every possible trajectory by the level curves of the Hamiltonian. The application to known objects reveals pathways to high perihelion distances. In particular, distant resonant objects can be tracked back to their resonance capture.

SQLfast : langage et environnement logiciel pour la manipulation de données par des utilisateur non experts
2016-11-08 12:00 - 13:00
