[Todos CMAT] "Coherent motion of chaotic attractors, with applications to a flock of starlings", Seminario Dra. Hilda A. Cerdeira

Lydia Tappa lydia en cmat.edu.uy
Mar Ago 15 14:50:51 -03 2017

Recibo y difundo seminario.

---------- Forwarded message ----------
From: Jimena Rodríguez <pedecibafisica en gmail.com>
Date: 2017-08-15 13:44 GMT-03:00
Subject: "Coherent motion of chaotic attractors, with applications to a
flock of starlings", Seminario Dra. Hilda A. Cerdeira
To: Lydia Tappa <lydia.tappa en gmail.com>

*El Seminario será el martes 22 de agosto*  *a las 14hs en el Salón de
Seminarios del IFFC*.

*Author:* Hilda A. Cerdeira

*Affiliation:* Instituto de Física Teórica (IFT - UNESP), São Paulo, Brazil

*Title:* *Coherent motion of chaotic attractors, with applications to a
flock of starlings*

*Abstract:* We report a simple model of two drive-response type coupled
chaotic oscillators where the response system copies the nonlinearity of
the driver system. It leads to a coherent motion of the trajectories of the
coupled systems that establishes a constant separating distance in time
between the driver and the response attractors and their distance depends
upon the initial state. The coupled system responds to external obstacles,
modeled by short-duration pulses acting either on the driver or the
response system, by a coherent shifting of the distance and, it is able to
readjust their distance as and when necessary via mutual exchange of
feedback information. We conrm these behaviors with examples of a Jerk
system, the paradigmatic Roessler system, a tunnel diode system and a
Josephson Junction based Jerk system, analytically to an extent and mostly
numerically. Application to a flock of starlings  will be discussed.

*About the author *[see http://www.hcerdeira.info/]*:*

Hilda A. Cerdeira was born in Argentina. She graduated as Licenciada en
Fisica at the Universidad Nacional de Buenos Aires. She holds a Ph.D. in
Physics from Brown University. She held postdoctoral positions at Max
Planck Institut for Festkkoerperforschung and Mettallforschung. She was
professor at the University of Campinas, Brazil, before moving to Italy.

She was a Scientific Member of the Condensed Matter Group of the Abdus
Salam ICTP Theoretical Physics and also the Head of the Donation Programme
of the Abdus Salam International Centre FOR Theoretical Physics. For a
number of years she shared the chairmanship of the Adriatico Research
Conferences with Professor Stig Lundqvist. She has edited a number of
conference Proceedings. She works in nonlinear dynamical systems, in
particular in synchronization of chaotic systems, where her work on
decoding signals masked in low dimensional chaotic signals is one of the
milestones of the field. She was a member of the Editorial Board of the
International Journal for Bifurcation and Chaos, the World Scientific
Series on Lectures in Complex Systems and Learned Publishing. She was a
member of the IUPAP working group on Communications in Physics, a
Member-at-Large of the Governing Board of the American Institute of Physics
and a member of the Advisory Board of Physics Today. In International
issues, she developed the eJournals Delivery Service, which is a service
for researchers in institutions in Third World Countries, where low
bandwidth Internet facilities or lack of funds do not allow downloading of
scientific material in a timely manner. The service allows access to over
300 of the highest impact journals in Physics and Mathematics.

At present she is a Retired Professor, at the Instituto de Física Teórica,
UNESP, São Paulo, Brazil, where she dedicates most of her time to do
Research at Leisure, dedicating a large part of her time to search for
signals of coming seizures in electroencephalograms of epileptic patients.
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