New perspectives for recommendations in location-based social networks: time, privacy and explainability

Authors:
Pavlos Kefalas;Panagiotis Symeonidis;Yannis Manolopoulos
Affiliations:
Aristotle University, Thessaloniki;Aristotle University, Thessaloniki;Aristotle University, Thessaloniki
Venue:
Proceedings of the Fifth International Conference on Management of Emergent Digital EcoSystems
Year:
2013

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Abstract

Online social networks have attracted users' attention in the last decade. Recommendation services constitute a critical functionality of such social platforms: users receive recommendations about resources (documents, pieces of music) and potential friends (people with the same interests). Recently, technological progressions in smart phones enabled the exploitation of geographical data information in social networks. Users can now receive recommendations about new Points of Interest (POIs), and new activities in POIs. Eventually, Location-based Social Networks (LBSNs) may become the 'Next Big Thing' of the Internet industry. This paper surveys the related work and current state-of-the-art algorithms in LBSNs. We also provide three new perspectives that concern recommendations in LBSNs: time-awareness, user's privacy issues, and explainability of recommendations. We present the latest work in LBSNs by comparing real systems and by categorizing them in multiple ways (platforms, personalization, etc.).