• 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) ...
    • Article  

      Architectural support for data-driven execution 

      Matheou, George; Evripidou, Paraskevas (2014)
      The exponential growth of sequential processors has come to an end, and thus, parallel processing is probably the only way to achieve performance growth. We propose the development of parallel architectures based on ...
    • Conference Object  

      Argumentation and temporal persistence 

      Hadjisoteriou, Evgenios; Kakas, Antonis C. (2011)
      We study how the problem of temporal projection can be formalized in terms of argumentation. In particular, we extend earlier work of translating the language E for Reasoning about Actions and Change into a Logic Programming ...
    • Article  

      Argumentation based modelling of embedded agent dialogues 

      Dimopoulos, Yannis; Kakas, Antonis C.; Moraïtis, Pavlos (2006)
      This paper presents a novel approach to modelling embedded agent dialogues. It proposes a specific structure for the supporting information accompanying the arguments that agents exchange during a dialogue, it defines ...
    • Article  

      Argumentation Logic 

      Kakas, Antonis C.; Toni, F.; Mancarella, P. (2014)
      We propose a novel logic-based argumentation framework, called Argumentation Logic (AL), built upon a restriction of classical Propositional Logic (PL) as its underlying logic. This allows us to control the application of ...
    • Article  

      Brain and behavioral correlates of action semantic deficits in autism 

      Moseley, Rachel L.; Mohr, Bettina; Lombardo,Michael V.; Baron-Cohen,Simon; Hauk, Olaf; Pulvermueller, Friedemann (2013)
      Action-perception circuits containing neurons in the motor system have been proposed as the building blocks of higher cognition; accordingly, motor dysfunction should entail cognitive deficits. Autism spectrum conditions ...
    • Article  

      Brain routes for reading in adults with and without autism: EMEG evidence 

      Moseley, Rachel L.; Pulvermueller, Friedemann; Mohr, Bettina; Lombardo,Michael V.; Baron-Cohen,Simon; Shtyrov, Yury (2014)
      Reading utilises at least two neural pathways. The temporal lexical route visually maps whole words to their lexical entries, whilst the nonlexical route decodes words phonologically via parietal cortex. Readers typically ...
    • Conference Object  

      Communities: Concept-based querying for mobile services 

      Skouteli, C.; Panayiotou, Christoforos; Samaras, George S.; Pitoura, Evaggelia 1967- (2005)
      In this paper, we consider semantic service discovery in a global computing environment. We propose creating a dynamic overlay network by grouping together semantically related services. Each such group is termed a community. ...
    • Article  

      Comparison of collaborative and content-based automatic recommendation approaches in a digital library of Serbian PhD dissertations 

      Azzopardi, J.; Ivanovic, D.; Kapitsaki, Georgia M. (2017)
      Digital libraries have become an excellent information resource for researchers. However, users of digital libraries would be served better by having the relevant items ‘pushed’ to them. In this research, we present various ...
    • Article  

      The computational value of joint consistency 

      Dimopoulos, Yannis (1994)
      In this paper we investigate the complexity of some recent reconstructions of Reiter's Default Logic using graph-theoretical structures. It turns out that requiring joint consistency of the justification of the applied ...
    • Article  

      Computing the acceptability semantics 

      Toni, F.; Kakas, Antonis C. (1995)
      We present a proof theory and a proof procedure for nonmonotonic reasoning based on the acceptability semantics for logic programming, formulated in an argumentation framework. These proof theory and procedure are defined ...
    • Conference Object  

      Concept-based discovery of mobile services 

      Skouteli, C.; Samaras, George S.; Pitoura, Evaggelia 1967- (2005)
      In this paper, we consider semantic service discovery in a global computing environment. We propose creating a dynamic overlay network by grouping together semantically related services. Each such group of services is ...
    • 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  

      DBGlobe: A service-oriented P2P system for global computing 

      Pitoura, Evaggelia 1967-; Abiteboul, S.; Pfoser, D.; Samaras, George S.; Vazirgiannis, M. (2003)
      The challenge of peer-to-peer computing goes beyond simple file sharing. In the DBGlobe project, we view the multitude of peers carrying data and services as a super-database. Our goal is to develop a data management system ...
    • 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  

      Encoding planning problems in nonmonotonic logic programs 

      Dimopoulos, Yannis; Nebel, B.; Koehler, J. (1997)
      We present a framework for encoding planning problems in logic programs with negation as failure, having computational efficiency as our major consideration. In order to accomplish our goal, we bring together ideas from ...
    • Article  

      Experiences from developing a distributed context management system for enabling adaptivity 

      Paspallis, Nearchos; Chimaris, Avraam N.; Papadopoulos, George Angelos (2007)
      Today, one can observe an ever increasing trend in the use of mobile systems. This change inevitably affects the software running on such devices by necessitating additional functionality such as context awareness and ...
    • Article  

      Exploiting course grain parallelism from FORTRAN by mapping it to IF1 

      Lachanas, Adrianos; Evripidou, Paraskevas (1998)
      FORTRAN, a classical imperative language is mapped into IF1, a machine-independent dataflow graph description language with Single Assingment Semantics (SAS). Parafrase 2 (P2) is used as the front-end of our system. It ...
    • Article  

      Exploring content dependencies to better balance performance and freshness in web database applications 

      Papastavrou, Stavros; Chrysanthis, Panos K.; Samaras, George S. (2012)
      In this paper, we present a novel approach for materializing dynamic web pages by exploiting content dependencies and user access patterns. We introduce two new semantic-based data freshness metrics and show that our ...