Please distribute to others who may be interested... You are hereby invited to a seminar in our twelfth interdisciplinary series on Evolution, Complexity and Cognition <http://ecco.vub.ac.be/?q=node/108> (ECCO 2015-2016)
Time: Friday March 18, 14h-16h Place: *room D.2.15, *building D, VUB ------------------------------ Social spike trains in twitter: hashtag diffusion, user communication, and searching rooms for neurolinguistic Ceyda Sanlı <https://fcxn.wordpress.com/> (Complexity and Networks group, naXys (Namur Center of Complex Systems), University of Namur) Abstract: Daily, humans are mobile in large-scales, but decide in small-scales. Decision-making covers personal tasks. However, under emergence conditions, panic due to earthquake, protest movements, elections, and announcements of scientific discoveries, humans both decide and move collectively in large-scales. Together with internal daily circadian rhythm and strong time-dependent relations in individual tasks, the external factors design our social dynamic behavior and the features are hidden in time signals producing every second by our digital footprints in smart cities, mobile phones, and activities in online social media. Considering two weekly twitter data sets, the French election, Ref. 1, and the announcement of the Higgs boson discovery, Ref. 2, both held on 2012, in this talk we will draw a parallel between social time series in the data and neuron spike trains. In each case, the process presents complex dynamic patterns including temporal correlations, burstiness, and all other types of nonstationarity. We propose the adoption of the so-called local variation in order to uncover salient dynamical properties, while properly detrending for the time-dependent features of a signal. The methodology is tested on both real and randomized social spike trains, and identifies that popular contents and users present less bursty behavior, suggesting its potential use for characterizing heterogeneity of self-organized popularity in online social media. Finally, we will link the understandings with communication of humans by recently developed tools in neurolinguistic. Reference works: [1] C. Sanli and R. Lambiotte, PLoS ONE, 10(7): e0131704, 2015. [2] C. Sanli and R. Lambiotte, Frontiers in Physics: Social Science 3(79), 2015. ------------------------------ Upcoming Seminars We will really start our new series on April 22. More info about the ECCO seminar program: http://ecco.vub.ac.be/?q=node/108 -- Evo Evo Busseniers - Seminar Coordinator ECCO Group (VUB) <http://ecco.vub.ac.be/?q=node/1> Email: [email protected] Website: http://vub.academia.edu/EvoBusseniers <http://be.linkedin.com/in/weaver9/>
