Nowadays, people engage more and more in social networks, such as Twitter, FaceBook, and Orkut, etc. In these social network sites, users create relationship with familiar or unfamiliar persons and share short messages between each other. One arising problem for these social networks is information is real-time and updates so quickly that users often feel lost in such huge information flow and ...

The "cock-a-doodle-doo" crowing of roosters, which symbolizes the break of dawn in many cultures, is controlled by the circadian clock. When one rooster announces the break of dawn, others in the vicinity immediately follow. Chickens are highly social animals, and they develop a linear and fixed hierarchy in small groups. We found that when chickens were housed in small groups, the top-ranking ...

Web search engines are traditionally focused on textual content of data. Emergence of social networks and Web 2.0 applications makes it interesting to see how social data can be used in improving the conventional textual search on the web. In this paper, we focus on how to improve the effectiveness of web search by utilizing social data available from users, users actions and their underlying s...

Reasoning about agent preferences on a set of alternatives, and the aggregation of such preferences into some social ranking is a fundamental issue in reasoning about multi-agent systems. When the set of agents and the set of alternatives coincide, we get the ranking systems setting. A famous type of ranking systems are page ranking systems in the context of search engines. In this paper we pre...

We introduce an original mathematical model to analyze the diffusion of posts within a generic online social platform. The main novelty is that each user not simply considered as node on graph, but further equipped with his/her own Wall and Newsfeed, has individual self-posting re-posting activity. As result using our developed model, we derive in closed form probabilities originating from give...

Many research have been focusing on how to match the textual query with visual images and their surrounding texts or tags for Web image search. The returned results are often unsatisfactory due to their deviation from user intentions. In this paper, we propose a novel image ranking approach to web image search, in which we use social data from social media platform jointly with visual data to i...