Browsing by Subject "Information retrieval"

Now showing items 1-20 of 35

    • Conference Object  

      An ActOn-based semantic information service for EGEE 

      Xing, Wei; Corcho, O.; Goble, C.; Dikaiakos, Marios D. (2007)
      We describe an information service that aggregates metadata available in hundreds of information sources of the EGEE Grid infrastructure. It uses an ontology-based information integration architecture (ActOn), which is ...
    • Article  

      An ActOn-based semantic information service for Grids 

      Xing, Wei; Corcho, O.; Goble, C.; Dikaiakos, Marios D. (2010)
      We describe a semantic information service that aggregates metadata from a large number of information sources of a large-scale Grid infrastructure. It uses an ontology-based information integration architecture (ActOn) ...
    • Conference Object  

      Adaptive agent negotiation via argumentation 

      Kakas, Antonis C.; Moraïtis, Pavlos (2006)
      In this paper, we study how argumentation can be used as a basis for negotiation between autonomous agents, where negotiation strategies of the different parties are represented as argumentation theories within their ...
    • Conference Object  

      Applying trust mechanisms in an agent-based P2P network of service providers and requestors 

      Tamani, E.; Evripidou, Paraskevas (2006)
      Building an agent-based network of service providers and requestors requires the effective management of the interactions among peers. These interactions, as in real life, require the mutual trust of the peers participating ...
    • Conference Object  

      Characterization and analysis of a web search benchmark 

      Hadjilambrou, Zacharias; Kleanthous, Marios M.; Sazeides, Yiannakis (Institute of Electrical and Electronics Engineers Inc., 2015)
      Web search as a service is very impressive. Web search runs on thousands of servers which perform search on an index of billions of web pages. The search results must be both relevant to the user queries and reach the user ...
    • Conference Object  

      Control of jump linear systems over jump communication channels - Source-channel matching approach 

      Donic, S. Z.; Charalambous, Charalambos D. (2007)
      The control of partially observed jump linear systems over jump communication channels is investigated when the Plant State Information (I*SI) and the Channel Slate Information (CSI) are present at the transmitter and the ...
    • Conference Object  

      A core grid ontology for the semantic grid 

      Wei, X.; Dikaiakos, Marios D.; Sakellariou, R. (2006)
      In this paper, we propose a Core Grid Ontology (CGO) that define s fundamental Grid-specific concepts, and the relationships between them. One of the key goals is to make this Core Grid Ontology general enough and easily ...
    • Conference Object  

      Cultural journeys in the information society 

      Fakas, Georgios John; Kakas, Antonis C.; Dionisiou, D.; Dionisiou, M.; Kentonis, Achilleas; Pattichis, Constantinos S.; Pitsillides, Andreas; Schizas, Christos N. (IEEE, 2000)
      This paper describes the Cultural Journeys in the Information Society (CJIS) project. CJIS project is an INCO project (973324) funded by the ECC and its aims to address the problem of electronic information roads at various ...
    • Article  

      Cytokine gene polymorphisms in multiple sclerosis: A meta-analysis of 45 studies including 7379 cases and 8131 controls 

      Nikolopoulos, Georgios K.; Masgala, Aikaterini; Tsiara, Chrissa G.; Limitsiou, O. K.; Karnaouri, Anthi C.; Dimou, Niki L.; Bagos, Pantelis G. (2011)
      Many environmental and genetic factors have been implicated in the development of multiple sclerosis. However, the aetiology has not been clarified yet. Therefore, using a meta-analytic approach, we tried to probe the ...
    • Article  

      Developing the evidence base for cancer chemoprevention: Use of meta-analysis 

      Nikolopoulos, Georgios K.; Bagos, Pantelis G.; Bonovas, Stefanos (2011)
      Meta-analysis is a quantitative approach for systematically combining the results of previous studies in order to arrive at conclusions about the body of research. It answers a specific research question, includes an ...
    • Article  

      Distributed middleware architectures for scalable media services 

      Kalogeraki, Vana; Zeinalipour-Yazdi, Constantinos D.; Gunopulos, Dimitrios; Delis, Alexis (2007)
      The fusion of Multimedia and Internet technology has introduced an ever-increasing demand for large-scale reliable media services. This exposes the scalability limitations of current middleware architectures, as they ...
    • Conference Object  

      Efficient online state tracking using sensor networks 

      Halkidi, Maria; Kalogeraki, Vana; Gunopulos, Dimitrios; Papadopoulos, Dimitris; Zeinalipour-Yazdi, Constantinos D.; Vlachos, Michail (2006)
      Sensor networks are being deployed for tracking events of interest in many environmental or monitoring applications. Because of their distributed nature of operation, a challenging issue is how to accurately identify the ...
    • Article  

      The Electronic Road: Personalized Content Browsing 

      Wallace, M.; Karpouzis, K.; Stamou, G.; Moschovitis, G.; Kollias, S.; Schizas, Christos N. (2003)
      The effectiveness of a content browsing system, based on semantic content analysis, user profiling, and adaptation, is discussed. The various aspects of electronic road are also described. An user's navigation path through ...
    • Article  

      Exploiting locality for scalable information retrieval in peer-to-peer networks 

      Zeinalipour-Yazdi, Constantinos D.; Kalogeraki, Vana; Gunopulos, Dimitrios (2005)
      An important problem in unstructured peer-to-peer (P2P) networks is the efficient content-based retrieval of documents shared by other peers. However, existing searching mechanisms are not scaling well because they are ...
    • Article  

      Finding the K highest-ranked answers in a distributed network 

      Zeinalipour-Yazdi, Constantinos D.; Vagena, Zografoula; Kalogeraki, Vana; Gunopulos, Dimitrios; Tsotras, Vassilis J.; Vlachos, Michail; Koudas, Nick; Srivastava, D. (2009)
      In this paper, we present an algorithm for finding the k highest-ranked (or Top-k) answers in a distributed network. A Top-K query returns the subset of most relevant answers, in place of all answers, for two reasons: (i) ...
    • Conference Object  

      FRES-CAR: An adaptive cache replacement policy 

      Pallis, George C.; Vakali, Athena I.; Sidiropoulos, E. (2005)
      Caching Web objects has become a common practice towards improving content delivery and users' servicing. A Web caching framework is characterized by its cache replacement policy, which identifies the objects (i.e. the ...
    • Article  

      Gastrointestinal stromal tumors during pregnancy: a systematic review of an uncommon but treatable malignancy 

      Zarkavelis, George; Petrakis, Dimitrios; Pavlidis, Nicholas (2015)
      Although modern social structure and medical advances have led to the increasing number of women childbearing in older age, cancer remains a rare diagnosis during pregnancy. There is little given information throughout the ...
    • Article  

      Information markets for product attributes: A game theoretic, dual pricing mechanism 

      Markopoulos, Panos M.; Aron, Ravi; Ungar, Lyle H. (2010)
      We model the availability of information about product attributes in Internet-based markets, focusing on a phenomenon that we term as information deficit (availability of less than perfect information about product attributes) ...
    • Article  

      Information retrieval techniques for peer-to-peer networks 

      Zeinalipour-Yazdi, Constantinos D.; Kalogeraki, Vana; Gunopulos, Dimitrios (2004)
      An important challenge in peer-to-peer (P2P) networks is to efficiently search the contents of other peers. The authors survey existing search techniques for information retrieval in P2P networks, including recent techniques ...
    • Article  

      LMA-based motion retrieval for folk dance cultural heritage 

      Aristidou, Andreas; Stavrakis, E.; Chrysanthou, Yiorgos L. (2014)
      Motion capture (mocap) technology is an efficient method for digitizing art-performances, and it is becoming a popular method for the preservation and dissemination of dances. However, stylistic variations of human motion ...