Master thesis defense: "Modeling and Representing Trust Relations in Semantic Web-Driven Social Networks: An Ontological Analysis"

2. Modeling and Representing Trust Relations in Semantic Web-Driven Social Networks: An Ontological Analysis Nima dokoohaki Royal Institute of Technology, Stockholm, June 2007

5. Adopted from “ The Semantic Web: A Guide to the Future of XML, Web Services, and Knowledge Management ” – Daconta et al., 2003 Structure XML Schema Security and Identity Inference Engine DAML+OIL,OWL RDF/RDF Schema Reasoning and Proof Higher Semantics Semantics Trust Syntax Data XML Domain NameSpace Intelligent Domain Applications and Services

17. Main sphere of trust ontology . 3 main Concepts of trust ontology as well as two relationships connecting them together. (visualized using Ontosphere3D plug-in for Protégé .)

18. Relationship concept ; two main properties of hasTrustee And hasTruster defined on the range of Foaf-agent and connected to AuxiliaryProperties And MainProperties using two relations of hasAuxiliaryProperties and hasMainProperties

19. MainProperties concept; having two main data type properties of trust subject (topical trust) , and trust value

20. AuxiliaryProperties concept; having 3 data type properties of DateBegin , DateEnd and ContextType and also hasRecommender which is defined on the range of foaf agent

24. Trust networks of small size Increasing the length of the network structure, Network contains 20 nodes and 34 edges) Increasing the width of the network structure, (Network contains 28 nodes and 54 edges) Clara Bob David Alice Trust / Cooking Distrust / Dishwashing Trust / Driving Distrust / Teaching 0.76 0.46 0.96 0.80 Clara Bob David Alice

25. Trust networks of larger size Hybrid Networks - Connected networks of different contexts ; a social and a business network. Example Hybrid networks, contain 8 people and 12 relations. 8 links are interconnections (local), and 4 links are acting as glue connecting two networks (foreign). Network contains 48 nodes and 92 edges . Clara Bob David Alice Ginger Eric Henrik Frida Social Network Business Network

26. Trust networks of larger size Meshed networks –Motivated from real-world network formations, complex, combined networks of different sizes and different contexts. Partial or fully connected meshed networks. In sample, A partial meshed network made-up of two connected hybrid networks; This network contains 16 people and 26 relations. (Network contains 98 nodes and 198 edges) C B D A aB G E H F O M P N K I L J

27. Structural comparison; Small sized networks Increase in length ; Networks of 4 people and 4 relationships. Increasing is width ; Networks of 4 people and 6 relationships.

28. Structural comparison; large sized networks Hybrid Network ; Network of 8 people and 12 relationships. Meshed network ; Networks of 16 people and 26 relationships.