caa a22 4500 605447500 CHVBK 20210128100132.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s11042-013-1804-2 doi (NATIONALLICENCE)springer-10.1007/s11042-013-1804-2 Social media for crisis management: clustering approaches for sub-event detection [Elektronische Daten] [Daniela Pohl, Abdelhamid Bouchachia, Hermann Hellwagner] Social media is getting increasingly important for crisis management, as it enables the public to provide information in different forms: text, image and video which can be valuable for crisis management. Such information is usually spatial and time-oriented, useful for understanding the emergency needs, performing decision making and supporting learning/training after the emergency. Due to the huge amount of data gathered during a crisis, automatic processing of the data is needed to support crisis management. One way of automating the process is to uncover sub-events (i.e., special hotspots) in the data collected from social media to enable better understanding of the crisis. We propose in the present paper clustering approaches for sub-event detection that operate on Flickr and YouTube data since multimedia data is of particular importance to understand the situation. Different clustering algorithms are assessed using the textual annotations (i.e., title, tags and description) and additional metadata information, like time and location. The empirical study shows in particular that social multimedia combined with clustering in the context of crisis management is worth using for detecting sub-events. It serves to integrate social media into crisis management without cumbersome manual monitoring. Springer Science+Business Media New York, 2013 Social media nationallicence Sub-event detection nationallicence Clustering nationallicence Information search and retrieval nationallicence Crisis management nationallicence Pohl Daniela Institute of Information Technology (ITEC), Multimedia Communication (MMC), Alpen-Adria-Universität Klagenfurt, Universitätsstrasse 65-67, 9020, Klagenfurt am Wörthersee, Austria aut Bouchachia Abdelhamid Smart Technology Research Center, School of Design, Engineering & Computing, Bournemouth University, Poole House Talbot Campus, Fern Barrow, BH12 5BB, Poole, UK aut Hellwagner Hermann Institute of Information Technology (ITEC), Multimedia Communication (MMC), Alpen-Adria-Universität Klagenfurt, Universitätsstrasse 65-67, 9020, Klagenfurt am Wörthersee, Austria aut Multimedia Tools and Applications Springer US; http://www.springer-ny.com 74/11(2015-06-01), 3901-3932 1380-7501 74:11<3901 2015 74 11042 https://doi.org/10.1007/s11042-013-1804-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11042-013-1804-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pohl Daniela Institute of Information Technology (ITEC), Multimedia Communication (MMC), Alpen-Adria-Universität Klagenfurt, Universitätsstrasse 65-67, 9020, Klagenfurt am Wörthersee, Austria aut NATIONALLICENCE 700 1- Bouchachia Abdelhamid Smart Technology Research Center, School of Design, Engineering & Computing, Bournemouth University, Poole House Talbot Campus, Fern Barrow, BH12 5BB, Poole, UK aut NATIONALLICENCE 700 1- Hellwagner Hermann Institute of Information Technology (ITEC), Multimedia Communication (MMC), Alpen-Adria-Universität Klagenfurt, Universitätsstrasse 65-67, 9020, Klagenfurt am Wörthersee, Austria aut NATIONALLICENCE 773 0- Multimedia Tools and Applications Springer US; http://www.springer-ny.com 74/11(2015-06-01), 3901-3932 1380-7501 74:11<3901 2015 74 11042