From traditional classroom teaching to e-learning through Learning Management Systems or Intelligent Tutoring Systems, there has been a paradigm shift from teacher centric models to learner centric models of learning. Next step is towards bringing interoperability and reusability among these applications. Semantic web has played an important role in designing such applications by either extending already existing applications to semantic web or creating new applications that are completely semantic web based. Use of visualization techniques is a step further towards increasing the efficiency of applications by providing visuals of the knowledge as these are more effective in expressing an idea. This paper compares and analyses two semantic web based learning frameworks that are functionally different but both use some kind of visualizations in representing knowledge structures. First model given by Zorica Bogdanović et al aims at improving searchability and browsability of educational resources in a Learning Management System by extending them into semantic web through its core logic component and using the visualization tools to create visualization of data and enrich it with information gathered from social networks and semantic databases. Second model is a conceptual browser named Conzilla developed by Naeve et al. which is totally based in semantic web and represents the knowledge in the form of context maps connected to each other through concepts. Although purpose and functionality of both these applications is quite different, both of them attempt to utilize sematic web characteristics as well as visualization tools in representing knowledge.

Full text: IJEIR_937_Final.pdf