Online Searching in PBL Tutorials

Online Searching in PBL Tutorials

subject searching in online cataloging systems

in online catalogs, searching based on subject keywords, comprise a significant percentage of searches. various studies, especially those of us origin, have stated it to be more than 50 percent. due to the importance of subject searching in online cataloging systems for users, much efforts is being exerted on the part of researchers and designers of such cataloging systems to increase its perfo...

Online Searching

We consider the problem of searching m branches which, with the exception of a common source s, are disjoint (hereafter called concurrent branches). A searcher, starting at s, must find a given “exit” t whose location, unknown to the searcher, is on one of the m branches. The problem is to find a strategy that minimizes the worst case ratio between the total distance traveled and the length of ...

Student perceptions of participation opportunities in online synchronous tutorials

From a sociocultural constructivist perspective of learning, dialogic interactions between students and tutors support meaning negotiation that leads to knowledge construction. In online educational contexts, interaction between learning parties is largely facilitated by CMC technologies. Most research has focused on asynchronous CMC modes which are held to offer learners an ever-present window...

Challenges in Searching Online Communities

An ever-growing number of users participate in online communities such as Flickr, del.icio.us , and YouTube , making friends and sharing content. Users come to these sites to find out about general trends – the most popular tags, or the most recently tagged item – as well as for more specific information, such as the recent posts of one of their friends. While these activities correspond to dif...