eprintid: 3523 rev_number: 5 eprint_status: archive userid: 69 dir: disk0/00/00/35/23 datestamp: 2016-08-31 08:47:26 lastmod: 2016-08-31 08:47:26 status_changed: 2016-08-31 08:47:26 type: conference_item metadata_visibility: show creators_name: Coletto, Mauro creators_name: Lucchese, Claudio creators_name: Orlando, Salvatore creators_name: Perego, Raffaele creators_id: mauro.coletto@imtlucca.it creators_id: creators_id: creators_id: title: Polarized User and Topic Tracking in Twitter ispublished: pub subjects: QA75 divisions: CSA full_text_status: none pres_type: paper keywords: algorithm, classification, controversy, hashtags, polarization, polarized user, social networks, topic tracking, twitter, user abstract: Digital traces of conversations in micro-blogging platforms and OSNs provide information about user opinion with a high degree of resolution. These information sources can be exploited to understand and monitor collective behaviours. In this work, we focus on polarisation classes, i.e., those topics that require the user to side exclusively with one position. The proposed method provides an iterative classification of users and keywords: first, polarised users are identified, then polarised keywords are discovered by monitoring the activities of previously classified users. This method thus allows tracking users and topics over time. We report several experiments conducted on two Twitter datasets during political election time-frames. We measure the user classification accuracy on a golden set of users, and analyse the relevance of the extracted keywords for the ongoing political discussion. date: 2016 date_type: published series: SIGIR '16 publisher: ACM place_of_pub: New York, NY, USA pagerange: 945-948 event_title: Proceedings of the 39th International ACM SIGIR Conference on Research and Development in Information Retrieval event_location: New York, USA event_dates: 2016 event_type: conference id_number: 10.1145/2911451.2914716 refereed: TRUE isbn: 978-1-4503-4069-4 book_title: Proceedings of the 39th International ACM SIGIR conference on Research and Development in Information Retrieval official_url: http://doi.acm.org/10.1145/2911451.2914716 citation: Coletto, Mauro and Lucchese, Claudio and Orlando, Salvatore and Perego, Raffaele Polarized User and Topic Tracking in Twitter. In: Proceedings of the 39th International ACM SIGIR Conference on Research and Development in Information Retrieval, 2016, New York, USA pp. 945-948. ISBN 978-1-4503-4069-4. (2016)