Sara Alaee - Electrical and Computer Engineering Department University of TehranTehran,Iran
Fattaneh Taghiyareh - Electrical and Computer Engineering DepartmentUniversity of TehranTehran,Iran

Document clustering is a useful technique to organize large sets of documents into meaningful groups. The usefulness is appreciated by labeling the clusters with relevant words that describe their associated documents. The traditional approach for document clustering, i.e. bag-of-words representation, often ignores the semantic relations between terms. Hence, ontology-based document clustering is proposed. In the context of e-Learning, the richer annotation of learning materials, via the use of appropriate ontologies is a way to deal with the reusability and remix of learning objects. Through providing a semantic infrastructure that will explicitly declare the semantics and relations between concepts used in labeling learning objects, the desired quality in the learning offer can be ensured. This paper proposes an ontology-based document clustering approach based on two-step clustering algorithm and compares its performance with the conventional clustering. Ontology is introduced through defining a weighting scheme that integrates traditional scheme, i.e. co-occurrences of words, with weights of relations between words in ontology. Our experimental evaluations are performed on ICVL (International Conference on Virtual Learning) paper collection as dataset with e-Learning domain ontology as the background knowledge. The ontology was implemented by us through a different research. The results show that inclusion of ontology increases the clustering quality.

Document Clustering; Ontology-based Clustering; eLearning; Ontology Generation; Semantic Relation; eLearning Concept