due to the lack of users knowledge of the collections used by search engines and in general retrieval systems, users can not express their information need appropriately in queries. in other words, they do not have enough experience to formulate their needs to find related documents. the idea of user’s query expansion aims to help users to improve and correct the queries. in fact, retrieval sys...

Introduction: Human resources in hospitals are one of the most important factors that play a key role in the information management plans success. This study was carried out with the aims of proposing an organizational jobs and positions model for health management and information technology department in Iranian hospitals. Methods: Our descriptive study was completed in two phases. In the firs...

designing an effective criterion for selecting the best rule is a major problem in theprocess of implementing fuzzy learning classifier (flc) systems. conventionally confidenceand support or combined measures of these are used as criteria for fuzzy rule evaluation. in thispaper new entities namely precision and recall from the field of information retrieval (ir)systems is adapted as alternative...