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Online social networks have found a significant increase in their popularity in recent years. All the networks have community structure, and one of the research problems mostly frequently tackled is the discovery of communities. An overlapping community is a network structure that allows one node to be a member of multiple communities. The method presented in this paper aims at detecting overlapping...
User model is one of the fundamentals to support personalized services. Not only the model has to represent user preferences precisely, but it must reflect the changes of user preferences over time as well. Existing user modeling approaches have several deficiencies such as lack of dynamics and adaptation, so the evolution of these models is much de-pendent on user's explicit feedbacks. Particularly,...
Web services are loosely coupled applications. Complex applications often need composition of services with simple functions. Many formalized models have been built for analyzing behaviors of service composition. For developers, it's necessary to quickly choose the adequate model for their composition scenarios. In this paper we provide a method which is able to decide efficiently whether a model...
The goal of user modeling is to provide personalized services based on userpsilas interests and preferences, thus allowing for more efficient information access. Frequently userpsilas interests drift with time. The ability to adapt fast to the current user's interests is an important feature of user model. In this paper, based on behavioral psychology, a SAM (Spreading Activation Model)-based evolution...
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