Panos Georgolios

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Fraud detection and prevention systems are based on various technological paradigms but the two prevailing approaches are rule-based reasoning and data mining. In this paper we claim that ontologies, an increasingly popular and widely accepted knowledge representation paradigm, can help both of these approaches be more efficient as far as fraud detection is(More)
Kostas Kafentzis (kkafe@ softlab.ntua.gr) is a Researcher, Gregoris Mentzas (gmentzas@ softlab.ntua.gr) is a Professor, Panos Georgolios (pgeorgol@ softlab.ntua.gr) is a Researcher, and all are at The National Technical University of Athens, Athens, Greece. Dimitris Apostolou (dapost@ planetey.com) is a Manager at Planet Ernst & Young, Athens, Greece.(More)
This paper addresses the area that is at the intersection of knowledge management and electronic commerce. This area refers to the exchange and trade of explicit and implicit knowledge at an inter-organizational level. Electronic knowledge marketplaces are currently emerging to address the opportunities and risks found in the purchase and selling of(More)
An increasing number of enterprises are getting interested in exploiting knowledge, tacit or explicit, lying outside their organizational borders and augmenting the knowledge network of their organizations. A first generation of knowledge e-marketplaces has arisen to provide the platforms for knowledge exchange and trading in an inter-organizational level.(More)
Interorganizational knowledge networks and knowledge marketplaces have emerged to enable organizations to share or commercially exploit their knowledge outside narrow organizational borders. The materialization of these structures requires concrete and sound mechanisms for the efficient external provision of knowledge stored in knowledge repositories within(More)
Inter-organizational knowledge networks and knowledge marketplaces have emerged in order to enable organizations to share or commercially exploit their knowledge outside narrow organizational borders. The materialization of these structures requires concrete and sound mechanisms for the efficient external provision of knowledge stored in knowledge(More)
Inter-organizational knowledge exchanges have recently emerged to enable organizations to share or even commercially exploit their knowledge outside organizational borders. The implementation of such exchanges requires mechanisms for efficiently providing external access to knowledge that is internally stored within an organization. In this paper, we(More)