Difficulties and motivations Two levels of difficulty to discover global emergence by local dynamic models: The definition of sensible and realistic microscopic models (intact data is needed) The usual problem of inferring the macroscopic phenomena out of the microscopic dynamic models i Motivations of studying Wikipedia The formation of Wikipedia is a kind of social knowledge dynamics; (if treat articles as knowledge Intact data for download Articles, categories, images and multimedia, talk pages, redirect and broken links and so on5 Difficulties and Motivations ❖ Two levels of difficulty to discover global emergence by local dynamic models: ➢ The definition of sensible and realistic microscopic models; (intact data is needed) ➢ The usual problem of inferring the macroscopic phenomena out of the microscopic dynamic models; ❖ Motivations of studying Wikipedia – The formation of Wikipedia is a kind of social knowledge dynamics; (if treat articles as knowledge) – Intact data for download; • Articles, categories, images and multimedia, talk pages, redirect and broken links, and so on