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SUMMARY:Walking on a Changing World: Characterizing Random Walks on Dynami
 c Networks
DTSTART:20111115T140000
DTSTAMP:20260406T161218Z
UID:c4a0f4cbf1c8dc732e7231f7d0539604937ec54e55b0fa54978724f7
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Daniel R. Figueiredo\nTitle:\nWalking on a Changing Worl
 d: Characterizing Random Walks on Dynamic Networks\n\nAbstract:\nIn a gene
 ral sense networks can be seen as models that encode the\nstructure of a r
 elationship among a set of objects. Network models have\ntraditionally bee
 n considered time invariant in the sense that structure\nis fixed over tim
 e. However\, structure of most real networks is constantly changing over t
 ime\, as relationships tend to form and break. In this talk\, we discuss s
 ome issues towards modeling and understanding dynamic networks. In particu
 lar\, we propose a general modeling framework and then study the behavior 
 of random walks on these dynamic networks. We find that the steady state b
 ehavior of random walks on dynamic networks is difficult to analyze as its
  stationary distribution depends on the walker rate. However\, we characte
 rize this\ndistribution for several particular cases: i) walker rate is si
 gnificantly larger or smaller than network dynamics (time-scale separation
 )\; ii) walker rate is proportional to current node degree (coupling betwe
 en dynamics)\; iii) when degrees of connected components are identical (st
 ructural restrictions).\n\nBio:\nDaniel R. Figueiredo received a MSc and P
 hD degree in Computer Science\nfrom the University of Massachusetts Amhers
 t (UMass) in 2005. He then\nworked as a post-doc researcher at the Swiss F
 ederal Institute of\nTechnology\, Lausanne (EPFL). In 2007\, he joined the
  Computer Science\nand Systems Engineering Department (PESC/COPPE) at the 
 Federal University of Rio de Janeiro (UFRJ)\, Brazil where he currently ho
 lds an associate professor position. He has a Research Productivity Fellow
 ship (since 2009) granted by CNPq to academics in Brazil and is a member (
 since 2010) of the Young Scientist Program granted by FAPERJ to academics 
 in the state of Rio de Janeiro. He is mainly interested in Complex Network
 s and in particular\, mathematical modeling of networked systems and Inter
 net applications.
LOCATION:BC 229 https://plan.epfl.ch/?room==BC%20229
STATUS:CONFIRMED
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