In the last years, social networking sites (SNSs) have enjoyed an undeniable success. Those web platforms have huge quantities of active users sharing lots of information everyday. Usually, user-generated content may be almost innocuous, however, some studies have shown that it may also contain very sensitive personal data. This situation may pose a serious privacy threat to the users due to th...

Illegal distribution of user-generated pornography (UGP) videos raises lots of negative aspects associated with the digital contents. This paper proposes a first forensic technique to detect UGP video. To discriminate UGP videos, we exploit shot based sensor pattern noise (SPN) from an image under investigation. By thresholding average peakto-correlation (PCE) values from the shot based SPNs, t...

The continuous growth of social networks and the active use of social media services result in massive amounts of user-generated data. More and more people worldwide report and distribute up-to-date information about almost any topic. Therefore, we argue that this kind of data is a good basis to observe ongoing situations in cities as well as related situations from outside about these cities i...

The growing popularity of social networks such as Facebook and LinkedIn demonstrates how the internet is changing; users are no longer simply downloading static data, but are increasingly uploading and sharing content among themselves, leading to a proliferation of social networks and other user-generated content sites (Harris & Rae, 2009). Li and Bernoff (2008) refer to this basic transfer of ...

Despite the increasing attention paid to the social interaction in online social networks, it is still not clear how social media users interact with each other, consume different content, and expand their social network. This study conceptualizes two types of user engagement (internal and external) and empirically examines the dynamics between user’s engagement, friends’ engagement, and networ...

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In this paper, we describe our participation in the INEX 2014 Social Book Search(SBS) Track Suggestion Task. We investigate the contribution of user-generated data and construct a social book search system based on several important techniques. We perform re-ranking on Galago searching results on enriched XML index by 11 different strategies and combine the results with learning to rank. We fin...

Users looking for books online are confronted with both professional meta-data and user-generated content. The goal of the Interactive Social Book Search Track was to investigate how users used these two sources of information, when looking for books in a leisure context. To this end, participants recruited by seven teams performed two main tasks and one optional task using a user-interface tha...

Using Web-based contents management systems such as Blog, an end user can easily publish User Generated Content (UGC). Although publishing of UGCs is easy, controlling access to them is a difficult problem for end users. Currently, most of Blog sites offer no access control mechanism, and even when it is available to users, it is not sufficient to control users who do not have an account at the...

Much of the early morphology and syntax of clause structure (until roughly age 3;0) can be described via the Optional Infinitive (OI) model (Wexler 1990, 1992, 1994), and recent versions of the theory incorporating the Unique Checking Constraint (UCC) (Wexler 1998) successfully explain variation in whether a language goes through the OI stage. The purpose of this paper is to apply the theory to...