Speaker:

Sune Lehmann, Professor of Networks and Complexity Science, DTU Compute, Technical University of Denmark

Title:

How was your network data generated?

Abstract:

A recent trend in the world of Network Science is higher-order network analysis. In higher-order analyses we go beyond graphs by focusing on interactions involving more than two individuals through e.g. hypergraphs, simplicial complexes, motif-derived data, or tensors and higher-order Markov chains. But how do we choose which structures are relevant for which networks? In my talk, I discuss an (I think) heretofore overlooked aspect of temporal network analysis, namely the constraints imposed by the network generating process. These constraints offer a unifying perspective to organize higher order network models. I discuss how the structure of communication events strongly constrain network configurations and shape network flows in a way that strongly impacts key areas of dynamic network analysis from community detection and null models, to our approach to modeling dynamics.

Speaker Bio:

Sune Lehmann is a Professor of Networks and Complexity Science at DTU Compute, Technical University of Denmark. He is also a Professor of Social Data Science at the Center for Social Data Science (SODAS), University of Copenhagen. His work focuses on quantitative understanding of social systems based on massive data sets. A physicist by training, his research draws on approaches from the physics of complex systems, machine learning, and statistical analysis. Professor Lehmann works on large-scale behavioral data and while his primary focus is on modeling complex networks, his research has made substantial contributions on topics such as human mobility, sleep, academic performance, complex contagion, epidemic spreading, and behavior on twitter.

Webinar:

https://northwestern.zoom.us/j/93842011581
Passcode: NICO2022

About the Speaker Series:

Wednesdays@NICO is a vibrant weekly seminar series focusing broadly on the topics of complex systems and data science. It brings together attendees ranging from graduate students to senior faculty who span all of the schools across Northwestern, from applied math to sociology to biology and every discipline in-between. Please visit: https://bit.ly/WedatNICO for information on future speakers.

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