ELFT HÍRADÓ

[StatFizSzeminar <statfiz AT glu.elte.hu>]

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             ELTE TTK Fizikai Intézet
         STATISZTIKUS FIZIKAI SZEMINÁRIUM


                  2018. december 12.

                       szerda 

                       11.00

 
               Emilio Hernandez-Garcia

                  IFISC (CSIC-UIB). 
              Palma de Mallorca, Spain


       "Network-theory approach to geophysical 
                  fluid transport"

Transport of water, air, heat, salt or pollutants
are key processes in climatic dynamics or for marine
ecosystems health. In this talk I will overview a 
set of techniques, which build on the so-called 'set-
oriented methods' to describe fluid transport, leading
to the construction of Lagrangian Flow Networks. In 
these networks, fluid transport is represented by 
directed links with strength quantifying the amount 
of flow among spatial locations. Powerful tools from 
network theory can then be applied to assess fluid 
mixing and stretching, compute dominant transport 
pathways, or to identify coherent structures in the
flow.  Applications to the surface circulation in 
the Mediterranean, with ecological implications, 
and to an atmospheric blocking event will be presented.



                       11.45 


                   Cristóbal López

                  IFISC (CSIC-UIB). 
              Palma de Mallorca, Spain


             "Active cluster crystals"

We study the appearance and properties of cluster 
crystals (solids in which the unit cell is occupied
by a cluster of particles) in a system of self-
propelled Active Brownian particles with repulsive 
interactions. Self-propulsion deforms the clusters 
by depleting particle density inside, and for large
speeds it melts the crystal. Continuous field 
descriptions at several levels of approximation allow
to identify the relevant physical mechanisms.



1117, Budapest, Pázmány P. sétány 1/A, Északi tömb 2.54
        honlap: http://glu.elte.hu/~statfiz

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