[Todos] HOY: Coloquios DF - Jorge Tredicce (FCEyN - UBA), 14hs, Aula Seminario, 2do piso, Pab. I

[Augusto Roncaglia]

COLOQUIOS DEL DEPARTAMENTO DE F�SICA FCEYN - UBA


              En el Aula Seminario, 2do piso, Pab. I,

              Jueves 13/8, 14hs:

              JORGE TREDICCE

              DF - FCEyN - UBA.


             *Extreme events in Dynamical Systems*


Rogue waves, earthquakes of high magnitude, financial crises, tsunamis,
epileptic seizures…. have they any common feature other than their
catastrophic and undesirable character? Yes!, they are extreme events. One
of the main objectives of studying extreme events is to provide knowledge
and tools that can contribute to the reduction of vulnerability. Greater
attention is now paid to their causes and their study includes observation,
statistics and prediction, in particular due to the rising societal
exposure. During the last decade, extreme events have become the hot topic
of research in complex systems related to both the natural and human world.
However one central challenge is to develop models able to link the
dynamical behaviour to the origin of extreme events and to the associated
statistical behaviour.  The rarity of extreme events makes them hard to
study and even harder to predict, such events often appear in environments
or situations where measurements are difficult. These problems have led to
an absence of extensive data sets generated under controlled conditions,
resulting in associated difficulties in studying their generation
mechanisms and statistical properties in a quantitative manner. But such
events occur in deterministic systems, and therefore our capacity to
predict them is strongly diminished by our proper ignorance about the
causes that are able to generate them. One of the main objectives of our
actual research activity is to provide test benches and simple models able
to produce extreme events whose physical origin would be easily identified.
Here we present some “corner-table“ experiments using laser systems
generating optical rogue waves, thus pulses of high intensity satisfying
the condition to be called extreme events. We studied their origin,
mechanisms and predictability.
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