Um esquema de sincronismo para ambientes virtuais de ensino e aprendizagem

Abstract

Constraints on Internet access, resulting from intermittent and low quality connections, have become the main obstacle to the use of Virtual Environments for Teaching and Learning in locations outside large cities, especially in challenging geographical regions like the Amazon. In this context, we present a scheme to get around these limitations, based on use of local servers and a synchronization technique that enables mediation of access to central servers, keeping local resources even when Internet connection is interrupted, performing updates when the connection is reestablished again. The proposed scheme has been developed and tested in order to evaluate its behavior in different scenarios, as well as the corresponding user perception.