**5.2 Academics-industrial: complementarities with two languages**

Innovation is needed in today's challenging environment which dynamism and managing uncertainty is required [61]. Open innovation which is "a paradigm that assumes that firms can and should use external ideas as well as internal ideas to advance their technology" [13] embedded in the notion that the sources of knowledge for innovation is dispersed in the economy and involves a deliberately managed knowledge flows across organizational boundaries [62]. Through collaborative project partners develop, create and share knowledge. In dealing with different background, culture, process, and knowledge throughout collaborative project, organizations must improve their practices to access, share and create knowledge. Ecosystem of innovation [19, 20, 63] is more and more considered as territorial systems that facilitates and drive collaboration which facilitate knowledge sharing and innovation. Our results show that interprofessional collaboration- expressed by academia and industry partners- presents more challenge and obstacle in sharing knowledge. On the one hand lack of communication and leadership is often expressed as a missing skills of academia partners. On the other hand, a misunderstanding of the reality of partners is showed to be the reasons of those missing skills. This tensions between academia and industrials partners leads to a poor projects' output in terms of knowledge sharing whether is strong the contribution of governmental actors to bolster collaboration and open innovation.
