–In the fast growing wireless technologies, IEEE 802.11 handoff is a big issue in communication. The seamless handoff problem in WLANs is a very important design issue to support the new astounding and amazing applications in WLANs, particularly for a user in a mobile vehicle. The entire delay time of a handoff is divided into probe, authentication, and reassociation delay times. Because the pr...

aim of the present research was to design a proper model for management of knowledge in environmental organizations of country. in study of the model, suitability of the proposed model was researched by asking views of directors, deputies, managers of groups and scientific board members of environmental organizations of country. for this purpose, with review of research literature, insight pro...

Educational technology applications and lessons, such as learning modules, activities, and user-authored systems, face substantial implementation challenges in public schools and postsecondary institutions. The design of technology impacts the willingness of teachers to implement new technology; evaluators examining implementation obstacles can help improve design. In this article, both summati...

in current century, success of organizations is dependent on the correct management of knowledge and also knowledge management (km) successful implementation relies on its critical success factors (csfs). identifying these critical factors can help businesses in planning and implementing knowledge management. hence, this study aims to propose a conceptual model with the csfs approach in order t...