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• W3080332655 abstract "The location check-ins of users through various location-based services such as Foursquare, Twitter and Facebook Places, generate large traces of geo-tagged events. These event-traces often manifest in hidden (possibly overlapping) communities of users with similar interests. Inferring these implicit communities is crucial for forming user profiles for improvements in recommendation and prediction tasks. Given only time-stamped geo-tagged traces of users, can we find out these implicit communities, and characteristics of the underlying influence network? Can we use this network to improve the next location prediction task? In this paper, we focus on the problem of community detection as well as capturing the underlying diffusion process. We propose CoLAB, based on spatio-temporal point processes for information diffusion in continuous time but discrete space of locations. It simultaneously models the implicit communities of users based on their check-in activities, without making use of their social network connections. CoLAB captures the semantic features of the location, user-to-user influence along with spatial and temporal preferences of users. The latent community of users and model parameters are learnt through stochastic variational inference. To the best of our knowledge, this is the first attempt at jointly modeling the diffusion process with activity-driven implicit communities. We demonstrate CoLAB achieves upto 27% improvements in location prediction task over recent deep point-process based methods on geo-tagged event traces collected from Foursquare check-ins." @default.
• W3080332655 created "2020-09-01" @default.
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• W3080332655 date "2020-01-01" @default.
• W3080332655 modified "2023-10-17" @default.
• W3080332655 title "Modeling Implicit Communities from Geo-Tagged Event Traces Using Spatio-Temporal Point Processes" @default.
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• W3080332655 doi "https://doi.org/10.1007/978-3-030-62005-9_12" @default.
• W3080332655 hasPublicationYear "2020" @default.
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