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■ Detection and Delineation of Events and Sub-Events in Social Networks

Antonia Saravanou, Ioannis Katakis, George Valkanas, and Dimitrios Gunopulos. 2018. Detection and Delineation of Events and Sub-Events in Social Networks. In Proceedings of the 2018 IEEE on International Conference on Data Engineering (ICDE '18). IEEE.
In this paper, we introduce the problem of event detection and delineation. We propose a method that builds a heterogeneous network from the interactions between users and their posts and we detect events and their corresponding sub-events (highlights) in a streaming fashion.

 

Abstract
We define and solve the problem of event detection and delineation as a task of identifying events and decomposing them to their major sub-events, with a description and a timeline. We propose DeLi, an algorithm that focuses on providing such an understanding of events and sub-events. DeLi, to the best of our knowledge, is the first method that addresses the problem in a generic stream of text, and in an online fashion. Extensive evaluation on social streaming data demonstrates that, by combining the structure of a social network with content attributes, our method outperforms the state-of-the-art techniques.