Current Online social networks (OSN) are web services run on logically centralized infrastructure. Large OSN sites use content distribution networks and thus distribute some of the load by caching for performance reasons, nevertheless there is a central repository for user and application data. This centralized nature of OSNs has several drawbacks including scalability, privacy, dependence on a...

Online Social Networks (OSN) are among the most popular applications in today’s Internet. Decentralized online social networks (DOSNs), a special class of OSNs, promise better privacy and autonomy than traditional centralized OSNs. However, ensuring availability of content when the content owner is not online remains a major challenge. In this paper, we rely on the structure of the social graph...

Online Social Networks (OSN) are among the most popular applications in today’s Internet. Decentralized online social networks (DOSNs), a special class of OSNs, promise better privacy and autonomy than traditional centralized OSNs. However, ensuring availability of content when the content owner is not online remains a major challenge. In this paper, we rely on the structure of the social graph...

Online Social Network (OSN) is an emerging communication technology which has increasingly been used. Today organizations are paying more attention to the importance of these networks and are trying to create value with these emerging technologies. Current literature focuses on the information and network implications of these networks at the individual and group levels, leaving the organizatio...

There are currently, thousands of online social networks (OSN) available, each of which hosts millions of users. Users make new friendship links, join groups on diverse topics, share opinions and thus help in building a big knowledge repository. In this paper we study the problem of defining proximity measure between groups (communities) of OSN. Understanding the proximity among the groups in O...

Online Social Networks (OSN) during last years acquired a huge and increasing popularity as one of the most important emerging Web phenomena, deeply modifying the behavior of users and contributing to build a solid substrate of connections and relationships among people using the Web. In this preliminary work paper, our purpose is to analyze Facebook, considering a significant sample of data re...

Online Social Networks (OSN) face serious scalability challenges due to their rapid growth and popularity. To address this issue we present a novel approach to scale up OSN called One Hop Replication (OHR). Our system combines partitioning and replication in a middleware to transparently scale up a centralized OSN design, and therefore, avoid the OSN application to undergo the costly transition...

Online social networks (OSN) enable health professionals to learn informally, for example by sharing medical knowledge, or discussing practice management challenges and clinical issues. Understanding the learning context in OSN is necessary to get a complete picture of the learning process, in order to better support this type of learning. This study proposes critical contextual factors for und...

The most emerging communication medium for the last decade of years is Online Social Networks (OSNs). Online Social Network makes the communication quicker and cheaper. Facebook, Twitter, Google Plus, MySpace, Orkut, etc are the various existing online social networks. Among all the online social networks very few could turn the attention of the people towards them. However, all these social ne...

Decision making (DM) is something we all do in our daily lives. How shopping DM is conducted with the support of online social networks (OSN) has not been explored in research. Although the usage of OSN is growing rapidly, there is a poor understanding of how OSN can provide support to shopping decision makers; this research is aimed at understanding how shopping DM is conducted with the suppor...