El Helou, SandyGillet, DenisSalzmann, ChristopheSire, Stéphane2009-08-112009-08-112009-08-11200910.1145/1639714.1639791https://infoscience.epfl.ch/handle/20.500.14299/42029In this paper, we propose a personalized and contextual ranking algorithm implemented on top of the 3A interaction model. The latter is a generic model intended for designing and describing social and collaborative learning platforms integrating Actors, Assets and group Activities (the 3 “A”). The target user’s interactions with his/her environment are modeled in a heterogeneous graph. Then, the algorithm is applied to simultaneously rank actors, assets and group activities taking into account the target user’s context. As an illustrative application and a preliminary evaluation, we apply the algorithm on data related to the activities carried out in a European Research Project, especially the collaboration between its members through the joint production of deliverables in workpackages.CollaborationMarkov modelsPageRankRecommendation systemsCSCWSocial SoftwareeLearning 2.0text::conference output::conference proceedings::conference paper