Sharpening the focus: methodological issues in analysing on-line conferences
Abstract As on-line discussion becomes an increasingly important and significant aspect of teachers' professional education, most particularly as part of distance learning environments, there is a need to understand and develop effective analytic techniques that provide insights into the processes at work within these systems. The computer conferencing environment at the centre of this study is a complex, unstructured discussion forum, of a type increasingly found as a component of continuing professional development courses. In these situations the evidence of knowledge building processes is a key concern. This study concentrates on a close examination of some existing analytic tools and considers their contribution to identifying the processes at work within these on-line environments, as teachers discuss aspects of education.
Now days there are tremendous amount of videos available on internet. Entertainment video, news video, sports video are accessed by users to fulfill their different needs. Our daily routine systems are also producing huge amount of videos for example surveillance system, shopping malls, home videos etc. These videos need to be accessed for different purposes. Current research topics on video includes video abstraction or summarization, video classification, video annotation, content based video retrieval. In nearly all these application one needs to identify shots in video which will correctly and briefly indicate the contents of video. This paper compares some of the popular shot boundary detection techniques. The merits and demerits of each of the techniques are also discussed. Some experiment done are also discussed.