318 Hanes Hall, CB #3260 Chapel Hill, NC 27599-3260
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Graduate Seminar: Mark He

January 17, 2020 @ 3:30 pm - 4:30 pm

Mark He

UNC-Chapel Hill


Intertemporal Community Detection in Human Mobility Networks: Case Studies of Bikeshare Systems in US Cities


We introduce a community detection method that finds clusters in network time-series by introducing a method that finds significantly interconnected nodes across time that are either increasing, decreasing, or constant in connectivity. Significance of nodal connectivity within a set are judged as by the Weighted Configuration Null Model at each time-point, then a novel significance-testing scheme is used to determine assess   connectivity at all time points and the direction of its time-trend. We apply this method to Bikeshare networks in New York City and Chicago to find patterns in human mobility among urban zones. Results show stark geographical patterns in clusters that are growing and declining in relative bike-share usage across time and potentially elucidate latent economic or demographic trends.

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January 17, 2020
3:30 pm - 4:30 pm
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120 Hanes Hall
Hanes Hall
Chapel Hill, NC 27599 United States