July 19, 2019
A paper titled "The evolution of polarization in the legislative branch of government," by Xiaoyan Lu, Jianxi Gao, and Boleslaw K. Szymanski was published by J. R. Soc. Interface,16:20190010, 2019. The paper studies the polarization of political opinions among members of the U.S. legislative chambers as measured by their voting records. The authors finds that polarization is...
July 06, 2019
Dr. Xiang Niu supervised by Professor Bolesaw K. Szymanski defended the Ph.D. thesis "The Dynamics in Opinion and Global Risk Networks: Modeling, Discovering and Control" and will join Google, Inc. in Montain View, CA in August 2019. Dr. Xiang was also co-advised by Professors Gyorgy Korniss of Physics and Jianxi Gao of Computer Science. This dissertation focuses on modeling...
July 01, 2019
Dr. Xiaoyan Lu supervised by Prof. Bolesaw K. Szymanski defended the Ph.D. thesis "Community Detection and its Applications in Understanding Dynamics of Social Networks" in March 2019 and graduated in May 2019. Dr. Lu will join Google, Inc. in New York, NY. His thesis focuses on community detection and its applications. Modularity is perhaps the most widely used quality metric to...
June 28, 2019
Prof. Boleslaw K. Szymanski presented an invited talk on "Data Analytics on Impact of Crime on Quality of Life" at the 2019 Center for Crime Evidence-Based Criminal Policy (CEBCP) Seminar at George Mason University, Arlington, VA on June 27, 2019. The talk discussed time and space distribution of crime activities in Chicago. The study used 2002-2017 crime data in 77 Chicago...
June 08, 2019
A paper titled "Modeling Human Temporal Dynamics in Agent-Based Simulations," by James Flamino, Weike Dai, and Boleslaw K. Szymanski was published in Proceedings of the 2019 ACM SIGSIM Conference on Principles of Advanced Discrete Simulations, ACM SIGSIM-PADS'19, Chicago, IL, June 3-5, 2019, ACM Press, pp. 99-103. The paper focuses on time-based habitual human behavior exhibited...
June 07, 2019
The paper titled: "Predicting complex user behavior from CDR based social networks," by Casey Doyle, Zala Herga, Stephen Dipple, Boleslaw K. Szymanski, Gyorgy Korniss, and Dunja Mladenic was published in Information Systems vol. 500, pp. 217-228 on May 30, 2019. The paper focuses on use of Call Detail Record (CDR) datasets that provide enough information about personal interactions...
June 06, 2019
Dr. Dunja Mladenic, Professor at J. Stefan International Postgraduate School and Head of Artificial Intelligence Laboratory at J. Stefan Institute, Slovenia presented NEST seminar hosted by Boleslaw K. Szymanski and titled "Observing User Mobility." The talk started with observation that today we are used to being interconnected via our smartphones and having our phone location...
May 16, 2019
Julian Sienkiewicz, Associate Professor from the Department of Physics at Warsaw University of Technology in Warsaw, Poland, presented a talk titled "Cricriticality in the q-neighbor Ising model on a partially duplex clique". In the talk Prof. Sienkiewicz shows how a modified kinetic Ising model -- a so-called q-neighbor Ising model -- behaves on a duplex clique and a partially...
April 20, 2019
The paper titled "What makes the social search efficient," by Amr Elsisy, Buster Holzbauer, Boleslaw K. Szymanski, Miao Qi, and Alex Pentland was posted in arXiv. The paper  sheds a new light on social routing though friends of friends. The original idea of the small world first put forth by Milgram in the 1960s shows empirically how people knowing reliably only connections to...
April 12, 2019
Today, Prof. Boleslaw K. Szymanski presented a talk titled "Finding Efficient Spreaders for Information Diffusion in Social Networks" at Google in Mountain View, CA. The research presented in the talk was inspired by recent global events and their poor predictability that are often attributed to the complexity of the world event dynamics. To improve the predictability, we use a...
April 06, 2019
A paper titled "Predicting complex user behavior from CDR based social networks," by Casey Doyle, Zela Herga Stephen Dipple, Boleslaw K. Szymanski, Gyorgy Korniss, Dunja Mladenić was posted on arXiv. The paper uses Call Detail Record (CDR) datasets with information about personal interactions to support building and analyzing detailed empirical social networks. The authors describe...
April 04, 2019
Online social media have democratized the broadcasting of information, encouraging users to view the world through the lens of social networks. The exploitation of this lens, termed social sensing, presents challenges for researchers at the intersection of computer science and the social sciences. The unprecedented connectivity afforded by social media also gives rise to...
April 03, 2019
A paper titled "Influence Maximization for Fixed Heterogeneous Thresholds," by P. D. Karampourniotis, B. K. Szymanski and G. Korniss has been published today by Scientific Reports, 9, 5573 (2019). The paper introduces two novel heuristics based on two very different metrics for influence maximization which is a NP-hard problem of selecting the optimal set of influencers in a...
March 27, 2019
Xiaoyan Lu,advised by Prof. Boleslaw Szymanski, defended today successfully his thesis titled: "Community Detection and its Applications in Understanding Dynamics of Social Networks," The Ph.d. Committed included Professors Malik Magdon-Ismail and Jianxi Gao from Computer Science and Gyorgy Korniss from Physics. The thesis was motivated by the desire to understand emergent social...
February 17, 2019
The paper generalizes inference algorithms to search not only for assortative communities but also for disassortative clustering. The maximization of generalized modularity performs well on networks in which the members of all communities are statistically indistinguishable from each other. However, there is no theory defining the maximization performance in more realistic networks...