A visit to the information mall: Web searching behavior of high school students
Journal of the American Society for Information Science - Special topic issue: youth issues in information science
Patterns of search: analyzing and modeling Web query refinement
UM '99 Proceedings of the seventh international conference on User modeling
Web search behavior of Internet experts and newbies
Proceedings of the 9th international World Wide Web conference on Computer networks : the international journal of computer and telecommunications netowrking
Scaling question answering to the Web
Proceedings of the 10th international conference on World Wide Web
Modern Information Retrieval
Passage retrieval based on language models
Proceedings of the eleventh international conference on Information and knowledge management
Generic Schema Matching with Cupid
Proceedings of the 27th International Conference on Very Large Data Bases
Computing Least Common Subsumers in Description Logics with Existential Restrictions
IJCAI '99 Proceedings of the Sixteenth International Joint Conference on Artificial Intelligence
The description logic handbook: theory, implementation, and applications
The description logic handbook: theory, implementation, and applications
Is question answering an acquired skill?
Proceedings of the 13th international conference on World Wide Web
Ambient Findability: What We Find Changes Who We Become
Ambient Findability: What We Find Changes Who We Become
A dissimilarity measure for ALC concept descriptions
Proceedings of the 2006 ACM symposium on Applied computing
Evaluating WordNet-based Measures of Lexical Semantic Relatedness
Computational Linguistics
Better results in mathematics lessons with a virtual personal teacher
Proceedings of the 34th annual ACM SIGUCCS fall conference: expanding the boundaries
Towards to an automatic semantic annotation for multimedia learning objects
Proceedings of the international workshop on Educational multimedia and multimedia education
Abductive matchmaking using description logics
IJCAI'03 Proceedings of the 18th international joint conference on Artificial intelligence
Semantic-Based automated composition of distributed learning objects for personalized e-learning
ESWC'05 Proceedings of the Second European conference on The Semantic Web: research and Applications
Resolving ambiguities in the semantic interpretation of natural language questions
IDEAL'06 Proceedings of the 7th international conference on Intelligent Data Engineering and Automated Learning
A subjective logic formalisation of the principle of polyrepresentation for information needs
Proceedings of the third symposium on Information interaction in context
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There is a growing discrepancy between the creation of digital content and its actual employment and usefulness in a learning society. Technologies for recording lectures have become readily available and the sheer number and size of such objects produced grows exponentially. However, in practice most recordings are monolithic entities that cannot be integrated into an active learning process offhand. To overcome this problem, recorded lectures have to be semantically annotated to become full-fledged e-learning objects facilitating automated reasoning over their content. We present a running web-based system - the e-Librarian Service CHESt - that is able to match a user's question given in natural language to a selection of semantically pertinent learning objects based on an adapted best cover algorithm. We show with empirical data that the precision of our e-Librarian Service is much more efficient than traditional keyword-based information retrieval; it yields a correct answer in most of the cases (93% of the queries), and mostly with a high precision, i.e., without supplementary hits. We also describe some ideas to improve the retrieval performance by user feedback.