Tightly Knit Spreading processes in empirical temporal networks Fariba Karimi Akademisk avhandling som med vederbörligt tillstånd av Rektor vid Umeå universitet för avläggande av filosofie doktorsexamen framläggs till offentligt försvar i hörsal NC300, Naturvetarhuset, fredagen den 20 febuari, kl. 12:00. Avhandlingen kommer att försvaras på engelska. Fakultetsopponent: Dr. Vittoria Colizza, Pierre et Marie Curie University, Faculty of Medicine, Paris, France. Institution för fysik/Department of physics Umeå universitet/Umeå University Umeå 2015 Organization Document type Date of publication Umeå University Department of Physics Doctoral thesis 30 January 2015 Author Fariba Karimi Title Tightly Knit – Spreading processes in empirical temporal networks Abstract We live in a tightly knit world. Our emotions, desires, perceptions and decisions are interlinked in our interactions with others. We are constantly influencing our surroundings and being influenced by others. In this thesis, we unfold some aspects of social and economical interactions by studying empirical datasets. We project these interactions into a network representation to gain insights on how socio-economic systems form and function and how they change over time. Specifically, this thesis is centered on four main questions: How do the means of communication shape our social network structures? How can we uncover the underlying network of interests from massive observational data? How does a crisis spread in a real financial network? How do the dynamics of interaction influence spreading processes in networks? We use a variety of methods from physics, psychology, sociology, and economics as well as computational, mathematical and statistical analysis to address the above questions. Keywords Empirical networks, temporal networks, complex systems, socio-economic networks, financial default, data mining, spreading and contagion, Language English ISBN 978-91-7601-209-3 Number of pages 55+ 4 papers
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