Semantic web and distance education


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Semantic web and distance education

  1. 1. The Contribution Of Semantic Web Technologies To Distance Learning And Education ZOU International Conference 16-17 June 2011 Dydimus Zengenene Erasmus Mundus Scholar International Master in Digital Library Learning (DILL) University College of Oslo, University of Tallinn, University of Parma
  2. 2. Contents <ul><li>Why we need the semantic web </li></ul><ul><li>Technologies of the semantic web </li></ul><ul><li>Distance education </li></ul><ul><li>Application of the semantic web </li></ul><ul><li>Conclusion </li></ul>
  3. 3. Introduction <ul><li>Web increasingly becoming key info source </li></ul><ul><li>The google age </li></ul><ul><li>but the web is dump </li></ul>
  4. 4. The semantic web <ul><li>Definition of the semantic web </li></ul><ul><li>Current web relies on Syntax </li></ul><ul><li>Need to base it on Semantics </li></ul><ul><li>Machine understandability </li></ul>
  5. 5. Why do we need it <ul><li>Searching: </li></ul><ul><li>Synonym </li></ul><ul><ul><li>multiple words same meaning </li></ul></ul><ul><li>Homonym </li></ul><ul><ul><li>same spelling different meanings </li></ul></ul>
  6. 6. Why do we need it <ul><li>Integration </li></ul><ul><li>Data mining </li></ul>
  7. 7. Why do we need it To reduce time, costs and errors that are incurred in the search, manipulation and utilization of web based resources.
  8. 8. What is it? An improved version of the current web, which can provide better services at lower costs by way of giving machines the power to understand the meaning of web documents.
  9. 9. Technologies of the semantic web <ul><li>What needs to be done: </li></ul><ul><li>Extend the current markup with semantic markup. </li></ul><ul><ul><li>Add metadata annotations that describe content / function of resources </li></ul></ul><ul><li>Have a standard web ontology language </li></ul><ul><li>Use ontologies to provide vocabulary for the annotations (Bechhofer, 2008) </li></ul>
  10. 10. Technologies of the semantic web <ul><li>Metadata </li></ul><ul><ul><li>Data about data (a layer to make the web of data) </li></ul></ul><ul><li>OWL </li></ul><ul><ul><li>ontology language ( RDF Schema + new constructions of expressiveness ) </li></ul></ul>
  11. 11. Technologies of the semantic web <ul><li>Ontology </li></ul><ul><ul><li>No agreement on what is is </li></ul></ul><ul><ul><li>“ a shared common vocabulary so that search engines, agents, authors and users can communicate ” (Bechhofer, 2008) </li></ul></ul><ul><ul><li>Has to be domain specific </li></ul></ul>
  12. 12. Technologies of the semantic web
  13. 13. Distance education <ul><li>Characteristics </li></ul><ul><li>Student teacher seperation </li></ul><ul><li>technical media to unite them </li></ul><ul><li>Two way communication </li></ul><ul><li>absence of permanent the learning groups </li></ul>
  14. 14. Distance education <ul><li>Current trends: </li></ul><ul><li>College age (lifelong learning) </li></ul><ul><li>Information explosion </li></ul><ul><li>Learner centred education </li></ul><ul><li>Increasing higher edu collaboration </li></ul><ul><li>Smaller gap local and distance edu </li></ul>
  15. 15. Application of the semantic web <ul><li>Current challenges: </li></ul><ul><li>Student-teacher communication </li></ul><ul><li>Collaborative learning environment </li></ul><ul><li>Personalized services </li></ul><ul><li>Precision in information retrieval </li></ul><ul><li>Make work easier for staff </li></ul>
  16. 16. Application of the semantic web <ul><li>Learning Environments </li></ul><ul><li>Systems that allow: </li></ul><ul><li>Setting online courses </li></ul><ul><li>Communication </li></ul><ul><li>Managing students’ activities </li></ul><ul><li>Eg. IVA, Moodle, Blackboad </li></ul>
  17. 17. The LOCO Analyst <ul><li>Defined as: </li></ul><ul><li>“ it is a framework for educational feedback based on semantic technologies which exploits the nature of ontologies to integrate various sources of information covering the same domain knowledge ” </li></ul>Some of the key people behind: Jelena Jovanovic´ university of Belgrade Dragan Gasˇevic´Athabasca University. Christopher Brooks University of Saskatchewan Vladan Devedzˇic´ university of Belgrade
  18. 18. Three tier architecture
  19. 19. Digital Library System <ul><li>Some digital library systems already utilising the Semantic technology </li></ul><ul><li>Semantic Interoperability of Metadata and Information in unLike Environments ( SIMILE) </li></ul><ul><li>JeromeDL </li></ul>
  20. 20. Advantages of semantic DLs <ul><li>No need for exact word in the search; (inference power) </li></ul><ul><li>based search and facet search </li></ul><ul><li>A mechanism of interoperability between different library systems access is not limited to one library </li></ul>
  21. 21. Advantages of Semantic DLs <ul><li>Users get involved in collaborative projects with the help of these libraries </li></ul><ul><li>Possibility to share information and personal experiences </li></ul>
  22. 22. Challenges <ul><li>Existing metadata of the digital libraries has to be lifted to a semantic level. </li></ul><ul><li>The social semantic digital libraries might produce amateurish data by some users and they offer limited security </li></ul><ul><li>(Aloitaibi 2010) </li></ul>
  23. 23. Challenges of attaining the semantic web <ul><li>Web page markup problem </li></ul><ul><li>Common vocabulary problem </li></ul><ul><li>Query building problem: </li></ul>
  24. 24. Conclusion and recommendations <ul><li>There are great benefits to gain from sematic technologies in Distance Education </li></ul><ul><li>Universities must invest in this area </li></ul><ul><li>Must start implementing the posibilities </li></ul><ul><li>Universities must keep track of the new developmets </li></ul>
  25. 25. Contacts. <ul><li>Email: [email_address] </li></ul><ul><li>Mobile: +372 56202278 </li></ul>