objective: the purpose of the current research is to determine the impact of play therapy on academic achievement of students with mental deficiency of khorramabad exceptional elementary school. method: it was a pre-test, post-test study design. 60 students were selected and according to their mental deficiency characteristics were assigned to either experimental or control group. each group co...

organizational knowledge creation theory of innovation and knowledge creation in organizations, tacit and explicit knowledge sharing. seci and knowledge will be a four-step process explains how to use the new organization was created. this theory of the coversion process from tacit knowledge to explicit and viceversa based on the idealism agent. ontological view of the theory is numynalysty and...