purpose: web sites are considered as an important tool on the internet and it has an important role in the utilization of students from the internet. in this study, we tried to evaluate iranian schools web sites. method: research population consists of 122 school websites. we used a check list for evaluation of school websites. findings: we found that all aspects of iranian school websites (aut...

in this paper the design and implementation of fault tolerable architecture for scientific workflow engines is presented. the engines are assumed to be implemented as composite web services. current architectures for workflow engines do not make any considerations for substituting faulty web services with correct ones at run time. the difficulty is to rollback the execution state of the workflo...

utilizing the resources of the web in educational practices has made instructional processes more efficient and interesting and has made the learning process on the other hand much easier and attractive. with the web, english language teachers now have the option of engaging learners in online (web-based) instructions in addition to the use of conventional classroom instructions or alternativel...