In an emergency situation, receiving prompt and organized help from nearby people is of critical importance. The growing use of online social networks (OSNs) in emergency situations is a clear indication of the natural applicability of online social networking technologies to emergency responses. Despite this intense interest, a number of fundamental limitations still exist, such as lack of con...

Music and online Social Network Sites (SNS) are closely intertwined in popular culture, but we know relatively little about how performers use and take advantage of such social systems. This paper investigates this space by exploring how professional DJs leverage SNS in their work. It adopts a long term mixed-methods ethnographic approach encompassing semi-structured interviews, supported by st...

The effectiveness of online social networks such as Facebook and Twitter for managing an organization is an area ripe for investigation in information systems research. Volunteer organizations in particular (who typically lag rather than lead in technology) stand to benefit from online social networks, if equipped with the knowledge to strategically implement these tools. This research context ...

The emergence of online social networks such as Friendster, MySpace, Facebook, and LinkedIn changed the way people socially engaged and interacted with each other, both in private and in professional life. Could the principles driving these websites be carried over to scientists and the world of research though? Between 2006 and 2008, more than a dozen online social networks for scientists laun...

Open network structures and brokerage positions have long been seen as playing a crucial role in sustaining social capital and competitive advantage. The degree to which individuals intermediate between otherwise disconnected others can differ across online and offline social networks. For example, users may broker online between two others who then exchange offline the information received thr...

As a social media, online social networks play a vital role in the social information diffusion. However, due to its unique complexity, the mechanism of the diffusion in online social networks is different from the ones in other types of networks and remains unclear to us. Meanwhile, few works have been done to reveal the coupled dynamics of both the structure and the diffusion of online social...

Online social networks are used to share the information among the different kind of people. There is a major task of online social network is information filtering. An online social network provides the little support for allowing sharing the information on the user walls. Using, machine learning algorithms text classification is to be done. Text categorization is applied to the set of pre cla...

In this chapter, we survey the literature on privacy in social networks. We focus both on online social networks and online af liation networks. We formally de ne the possible privacy breaches and describe the privacy attacks that have been studied. We present de nitions of privacy in the context of anonymization together with existing anonymization techniques.