The anatomy of a large-scale hypertextual Web search engine
WWW7 Proceedings of the seventh international conference on World Wide Web 7
Protecting Respondents' Identities in Microdata Release
IEEE Transactions on Knowledge and Data Engineering
Mining and summarizing customer reviews
Proceedings of the tenth ACM SIGKDD international conference on Knowledge discovery and data mining
Reality mining: sensing complex social systems
Personal and Ubiquitous Computing
WSDM '08 Proceedings of the 2008 International Conference on Web Search and Data Mining
Anonymity preserving pattern discovery
The VLDB Journal — The International Journal on Very Large Data Bases
Exploration of Link Structure and Community-Based Node Roles in Network Analysis
ICDM '07 Proceedings of the 2007 Seventh IEEE International Conference on Data Mining
Opinion Mining and Sentiment Analysis
Foundations and Trends in Information Retrieval
Group Recommendation with Automatic Identification of Users Communities
WI-IAT '09 Proceedings of the 2009 IEEE/WIC/ACM International Joint Conference on Web Intelligence and Intelligent Agent Technology - Volume 03
Empirical comparison of algorithms for network community detection
Proceedings of the 19th international conference on World wide web
Discovering community-oriented roles of nodes in a social network
DaWaK'10 Proceedings of the 12th international conference on Data warehousing and knowledge discovery
The social bookmark and publication management system bibsonomy
The VLDB Journal — The International Journal on Very Large Data Bases
Privacy-aware spam detection in social bookmarking systems
i-KNOW '11 Proceedings of the 11th International Conference on Knowledge Management and Knowledge Technologies
Community assessment using evidence networks
MSM'10/MUSE'10 Proceedings of the 2010 international conference on Analysis of social media and ubiquitous data
Proceedings of the 23rd ACM conference on Hypertext and social media
Face-to-face contacts at a conference: dynamics of communities and roles
MSM'11 Proceedings of the 2011 international conference on Modeling and Mining Ubiquitous Social Media
Proceedings of the 4th International Workshop on Modeling Social Media
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Social media is the key component of social networks and organizational social applications. The emergence of new systems and services has created a number of novel social and ubiquitous environments for mining information, data, and, finally, knowledge. This connects but also transcends private and business applications featuring a range of different types of networks and organizational contexts. Important structures concern subgroups emerging in those applications as communities (connecting people), roles and key actors in the networks and communities, and opinions, beliefs, and sentiments of the set of actors. Collective intelligence can then be considered as an emerging phenomenon of the different interactions. This focus article considers mining approaches concerning social media in social networks and organizations and the analysis of such data. We first summarize important terms and concepts. Next, we describe and discuss key actor identification and characterization, sentiment mining and analysis, and community mining. In the sequel we consider different application areas and briefly discuss two exemplary ubiquitous and social applications—the social conference guidance system Conferator, and the MyGroup system for supporting working groups. Furthermore, we describe the VIKAMINE system for mining communities and subgroups in social media in the sketched application domains. Finally, we conclude with a discussion and outlook. © 2012 Wiley Periodicals, Inc. © 2012 Wiley Periodicals, Inc.