ELFT HÍRADÓ

[tcsaba AT eik.bme.hu]

                               MEGHÍVÓ

        a BME Fizikai Intézete Elméleti Fizika Tanszékének

                           szemináriumára:


                         Marcell Stippinger
                  Department of Theoretical Physics
          Budapest University of Technology and Economics


          "Cascading failures in the mutual percolation of
                    interdependent networks"


Complex networks often cannot be described by single networks. To capture
systemic risk we use interdependent networks including usual connectivity
links within each network and the dependency links coupling nodes of
different networks. To study their resilience under failures we introduce
the process of mutual percolation. Interdependent networks are shown to be
more vulnerable to random failures than single networks: they exhibit
smaller percolation threshold and catastrophic breakdowns. The transition
is of hybrid character: While the order parameter is discontinuous, there
is scaling on one side of the transition point. We discuss the propagation
of avalanches of failures in interdependent networks. Simulation results
are presented for square lattices as starting networks under random attacks
of constant intensity. We measure scaling exponents beta and nu. Finally,
we propose a model with healing where reaction to failures is considered
and cascades are hindered.

Related publication:
M. Stippinger, J. Kertész: "Enhancing resilience of interdependent networks
by healing", Physica A, 2014, http://dx.doi.org/10.1016/j.physa.2014.08.069


Helye: BME Fizikai Intézet, Elméleti Fizika Tanszék
Budafoki út 8. F-épület, III lépcsöház
Szemináriumi szoba

Ideje: 2015. február 27. péntek, 10:15.

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