Online social networks have been gaining increasing economic importance in light of the rising number of their users. Numerous recent acquisitions priced at enormous amounts have illustrated this development and revealed the need for adequate business valuation models. The value of an online social network is largely determined by the value of its users, the relationships between these users, a...

Online social networks typically provide tools for users to set who can access their shared data. However, this access restriction only applies to network users and not for third parties and the social network itself. An approach only with data encryption is insufficient to keep both data privacy and the user's ability to obtain personalized services. This paper presents a model to extend the p...

In the social network of a web-based online game, all players are not equal. Through network analysis, we show that the community of players in a online social game is an example of a scale free small world network and that the growth of the player-base obeys a power law. The community is centred around a minority group of “hardcore” players who define the social environment for the game, and w...

In the current generation social network has become a popular way to communicate with each other which are spread across diverse location around the world. In social network any user can find other users and make friendship and they can make friend circle online around the world and thus users can form their own network. An Individual user can have multiple social network accounts to keep in to...

The emergence of the mediated social web – a distributed network of participants creating rich media content and engaging in interactive conversations through Internet-based communication technologies – has contributed to the evolution of powerful social, economic and cultural change. Online social network sites and blogs, such as Facebook, Twitter, Flickr and LiveJournal, thrive due to their f...

The usage of Online Social Networks (OSN) has grown immensely in the last few years. As more sensitive data is shared through OSN services, preserving privacy has become a major issue for the users of these systems. Most OSNs rely on a centralized architecture, which has the major drawback of privacy and control of the data. While decentralized architectures can provide better privacy to the us...

Large quantities of information are shared through online social networks, making them attractive sources of data for social network research. When studying the usage of online social networks, these data may not describe properly users’ behaviours. For instance, the data collected often include content shared by the users only, or content accessible to the researchers, hence obfuscating a larg...

Internet services today are often deployed and operated in data centers and clouds; users access and use the services by connecting to such data centers from their computing devices. For availability, fault tolerance, and proximities to users at diverse regions, a service provider often needs to run the service at multiple data centers or clouds that are distributed at different geographic loca...

The web content in present scenario is mainly comprised of Social media systems such as blogs, photo and link sharing sites and on-line forums. . Web Usage Mining is the application of data mining techniques in the field of social networks to discover exciting usage patterns from SNS data and to serve the needs of SNS applications in a better manner. The major use of web usage mining techniques...

The last decade has seen the rise of immense online social networks (OSNs) such as MySpace and Facebook. In this paper we use epidemiological models to explain user adoption and abandonment of OSNs, where adoption is analogous to infection and abandonment is analogous to recovery. We modify the traditional SIR model of disease spread by incorporating infectious recovery dynamics such that conta...