Social data in digital form—including user-generated content, expressed or implicit relations
between people, and behavioral traces—are at the core of popular applications and …

Users increasingly rely on crowdsourced information, such as reviews on Yelp and Amazon,
and liked posts and ads on Facebook. This has led to a market for blackhat promotion …

Users frequently use search systems on the Web as well as online social media to learn
about ongoing events and public opinion on personalities. Prior studies have shown that the …

We address the challenge of personalized recommendation of high quality content
producers in social media. While some candidates are easily identifiable (say, by being" …

Analysis of content streams gathered from social networking sites such as Twitter has
several applications ranging from content search and recommendation, news detection to …

With the widespread adoption of social media sites like Twitter and Facebook, there has
been a shift in the way information is produced and consumed. Earlier, the only producers of …

Purpose Social media platforms provide a source of information about events. However, this
information may not be credible, and the distance between an information source and the …

The proliferation of social networks and all the personal data that people share brings many
opportunities for develo** exciting new applications. At the same time, however, the …

User interests and expertise are valuable but often hidden resources on social media. For
example, Twitter Lists and LinkedIn's Skill Tags provide a partial perspective on what users …

Security issues such as natural disasters and terrorist attacks have attracted increasing
global concern and attention. How to effectively detect security events has become …