25 research outputs found
COGOM: Cognitive Theory Based Ontology Matching System
No full textAbstractOntology matching systems take a prominent position in solving semantic heterogeneity problems to facilitate sharing and reuse of ontologies. The process of generating ontology alignments through ontology matching techniques purely lies on how the concepts and relationships are modeled. This paper focuses on designing an ontology matching system in which concepts are modeled based on cognitive units of knowledge comprising of objects, attributes and relationships. The proposed cognitive based ontology matching system(COGOM) identifies semantically related concepts by aggregating the attribute similarity degree, structural similarity degree and semantic conception degree. The similarity computation is adapted from the Tversky psychological model of similarity. The proposed ontology matching system is adaptive in nature because of the cognitive based knowledge expression and the computational overhead of generating alignments is improved by forming quality clusters of semantically correlating concepts thus reducing the concept match space. The precision and recall metrics are used for evaluation of the proposed system using the benchmark data sets of OAEI 2015
A clustering-based ontology matching technique using cognitive theory and concept importance
No full textComparative study of game theoretic approaches to mitigate network layer attacks in VANETs
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Comparative study of game theoretic approaches to mitigate network layer attacks in VANETs
No full textFor the past few years, number of accidents have occurred due to the rapid usage of vehicles in the road and the lack of emergency alerts provisioning to the vehicle user during natural disasters. VANETs provide an environment to communicate between vehicles to avoid such accidents. Vulnerabilities in the network layer of VANET delays timely traffic data dissemination to the vehicle user. Ensuring security in VANET is very essential for the construction of a robust network for transmission of data. In this paper the game theoretic approaches like co-operative and non-cooperative games for handling security issues in VANET are discussed. Keywords: Game theory, Cooperative game, Non-Cooperative game, Nash equilibriu
Concept type and relationship type classification based approach for identifying and prioritizing potentially interesting concepts in ontology matching
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