An Adaptive Knowledge-Based Approach for Detecting Fraud across Different e-Government Domains. - Panos Alexopoulos; Kostas Kafentzis; Nicholas Athanassiadis; Xanthi Benetou; Tassos Tagaris; Carol Jollie; Panos Georgolios (ICETE (Selected Papers), 2007)

Towards a Generic Fraud Ontology in e-Government. - Panos Alexopoulos; Kostas Kafentzis; Xanthi Benetou; Tassos Tagaris; Panos Georgolios (ICE-B, 2007)

Resource sharing in multi-agent systems through multi-stage negotiation. - Panos Alexopoulos (AIAI, 2007)

Semantics Enabled Problem Based Brokering of Organizational Knowledge. - Kostas Kafentzis; Manolis Wallace; Panos Georgolios; Panos Alexopoulos; Gregoris Mentzas (Emerging Artificial Intelligence Applications in Computer Engineering, 2007)

A Fuzzy Ontology Framework for Customized Assessment of Semantic Similarity. - Panos Alexopoulos; Manolis Wallace; Konstantinos Kafentzis; Angelos Michalas (SMAP, 2008)

A negotiation strategy for the Temporal Resource Reallocation Problem in multi-agent systems. - Panos Alexopoulos; Manolis Wallace (Int. J. Internet Protoc. Technol., 2008)

ELMO: An Interoperability Ontology for the Electricity Market. - Panos Alexopoulos; Kostas Kafentzis; Christoforos Zoumas (ICE-B, 2009)

A Fuzzy Knowledge-based Decision Support System for Tender Call Evaluation. - Panos Alexopoulos; Manolis Wallace; Kostas Kafentzis; Aristodimos Thomopoulos (AIAI, 2009)

Facilitating Dialogue - Using Semantic Web Technology for eParticipation. - George Anadiotis; Panos Alexopoulos; Konstantinos Mpaslis; Aristotelis Zosakis; Konstantinos Kafentzis; Konstantinos Kotis (ESWC (1), 2010)

Towards a Framework for Trusting the Automated Learning of Social Ontologies. - Konstantinos Kotis; Panos Alexopoulos; Andreas Papasalouros (KSEM, 2010)

Semantic-Enabled Information Access: An Application in the Electricity Market Domain. - Panos Alexopoulos; Manolis Wallace; Konstantinos Kafentzis; Christoforos Zoumas; Dimitris Askounis (Semantics in Adaptive and Personalized Services, 2010)

Exploiting ontological relations for automatic semantic tag recommendation. - Panos Alexopoulos; John Pavlopoulos; Manolis Wallace; Konstantinos Kafentzis (I-SEMANTICS, 2011)

Supporting User Roles in Ontology Fuzzification. - Manolis Wallace; Panos Alexopoulos; Ioannis Papafragkos; Costas Vassilakis 001 (SMAP, 2011)

Scenario-Driven Selection and Exploitation of Semantic Data for Optimal Named Entity Disambiguation. - Panos Alexopoulos; Carlos Ruiz; José Manuél Gómez-Pérez (SWAIE, 2012)

Learning Vague Knowledge from Socially Generated Content in an Enterprise Framework. - Panos Alexopoulos; John Pavlopoulos; Phivos Mylonas (AIAI (2), 2012)

Identifying Conceptual Layers in the Ontology Development Process. - Manolis Wallace; Panos Alexopoulos; Phivos Mylonas (SETN, 2012)

Improving Automatic Semantic Tag Recommendation through Fuzzy Ontologies. - Panos Alexopoulos; Manolis Wallace (SMAP, 2012)

Semi-Automatic Generation of Quizzes and Learning Artifacts from Linked Data. - Guillermo Alvaro Rey; Irene Celino; Mariana Damova; Danica Damljanovic; Ning Li 028; Panos Alexopoulos; Vladan Devedzic (LiLe@WWW, 2012)

IKARUS-Onto: a methodology to develop fuzzy ontologies from crisp ones. - Panos Alexopoulos; Manolis Wallace; Konstantinos Kafentzis; Dimitris Askounis (Knowl. Inf. Syst., 2012)

Semantic Hyperlocal Search for Parlance Mobile Spoken Dialogue System. - Panos Alexopoulos; Marie-Aude Aufaure; Nesrine Ben Mustapha; Hugues Bouchard; José Manuél Gómez-Pérez; James Henderson 001; Beibei Hu; Joel Lang; Peter Mika; Yves Vanrompay (ESWC (Satellite Events), 2013)

Knowledge Tagger: Customizable Semantic Entity Resolution using Ontological Evidence. - Panos Alexopoulos; Boris Villazón-Terrazas; José Manuél Gómez-Pérez (I-SEMANTICS (Posters & Demos), 2013)

Interactive acquisition of fuzzy ontological knowledge indialogue systems. - Panos Alexopoulos; José Manuél Gómez-Pérez (K-CAP, 2013)

Towards Vagueness-Aware Semantic Data. - Panos Alexopoulos; Boris Villazón-Terrazas; Jeff Z. Pan (URSW, 2013)

Demonstration of the PARLANCE system: a data-driven incremental, spoken dialogue system for interactive search. - Helen F. Hastie; Marie-Aude Aufaure; Panos Alexopoulos; Heriberto Cuayáhuitl; Nina Dethlefs; Milica Gasic; James Henderson 001; Oliver Lemon; Xingkun Liu; Peter Mika; Nesrine Ben Mustapha; Verena Rieser; et al. (SIGDIAL Conference, 2013)

Towards Learning Personalized Semantic Relevance Paths in Dialogue Systems. - Panos Alexopoulos; Manolis Wallace (SMAP, 2013)

A Vague Sense Classifier for Detecting Vague Definitions in Ontologies. - Panos Alexopoulos; John Pavlopoulos (EACL, 2014)

Annotating Ontologies with Descriptions of Vagueness. - Panos Alexopoulos; Silvio Peroni; Boris Villazón-Terrazas; Jeff Z. Pan (ESWC (Satellite Events), 2014)

A Metaontology for Annotating Ontology Entities with Vagueness Descriptions. - Panos Alexopoulos; Silvio Peroni; Boris Villazón-Terrazas; Jeff Z. Pan; José Manuél Gómez-Pérez (URSW (LNCS Vol.), 2014)

Towards Vagueness-Oriented Quality Assessment of Ontologies. - Panos Alexopoulos; Phivos Mylonas (SETN, 2014)

The PARLANCE mobile application for interactive search in English and Mandarin. - Helen F. Hastie; Marie-Aude Aufaure; Panos Alexopoulos; Hugues Bouchard; Catherine Breslin; Heriberto Cuayáhuitl; Nina Dethlefs; Milica Gasic; James Henderson 001; Oliver Lemon; Xingkun Liu; Peter Mika; et al. (SIGDIAL Conference, 2014)

Towards Ontology-Based Question Answering in Vague Domains. - Panos Alexopoulos; Andrew D. Walker; José Manuél Gómez-Pérez; Manolis Wallace (SMAP, 2014)

A Semantic Framework for Harvesting Vague Enterprise Knowledge from Microposts. - Panos Alexopoulos; John Pavlopoulos; Phivos Mylonas (Int. J. Artif. Intell. Tools, 2014)

Troubleshooting and Optimizing Named Entity Resolution Systems in the Industry. - Panos Alexopoulos; Ronald Denaux; José Manuél Gómez-Pérez (ESWC, 2015)

Answer Type Identification for Question Answering - Supervised Learning of Dependency Graph Patterns from Natural Language Questions. - Andrew D. Walker; Panos Alexopoulos; Andrew J. Starkey; Jeff Z. Pan; José Manuél Gómez-Pérez; Advaith Siddharthan (JIST, 2015)

Creating domain-specific semantic lexicons for aspect-based sentiment analysis. - Panos Alexopoulos; Manolis Wallace (SMAP, 2015)

Towards a Meta-Reasoning Framework for Reasoning about Vagueness in OWL Ontologies. - Nophadol Jekjantuk; Jeff Z. Pan; Panos Alexopoulos (ICSC, 2016)

Construction of Enterprise Knowledge Graphs (II). - Panos Alexopoulos; Yuting Zhao; Jeff Z. Pan; Man Zhu (Exploiting Linked Data and Knowledge Graphs in Large Organisations, 2017)

Knowledge Architecture for Organisations. - Ronald Denaux; Yuan Ren 001; Boris Villazón-Terrazas; Panos Alexopoulos; Alessandro Faraotti; Honghan Wu (Exploiting Linked Data and Knowledge Graphs in Large Organisations, 2017)

Success Stories. - Marco Monti; Fernanda Perego; Yuting Zhao; Guido Vetere; José Manuél Gómez-Pérez; Panos Alexopoulos; Hai H. Nguyen; Gemma Webster; Boris Villazón-Terrazas; Nuria García-Santa; Jeff Z. Pan (Exploiting Linked Data and Knowledge Graphs in Large Organisations, 2017)

Question Answering and Knowledge Graphs. - Alessandro Moschitti; Kateryna Tymoshenko; Panos Alexopoulos; Andrew D. Walker; Massimo Nicosia; Guido Vetere; Alessandro Faraotti; Marco Monti; Jeff Z. Pan; Honghan Wu; Yuting Zhao (Exploiting Linked Data and Knowledge Graphs in Large Organisations, 2017)

Construction of Enterprise Knowledge Graphs (I). - Boris Villazón-Terrazas; Nuria García-Santa; Yuan Ren 001; Kavitha Srinivas; Mariano Rodriguez-Muro; Panos Alexopoulos; Jeff Z. Pan (Exploiting Linked Data and Knowledge Graphs in Large Organisations, 2017)

Understanding Knowledge Graphs. - Honghan Wu; Ronald Denaux; Panos Alexopoulos; Yuan Ren 001; Jeff Z. Pan (Exploiting Linked Data and Knowledge Graphs in Large Organisations, 2017)

Modeling, Measuring and Exploiting Concept Drift in the Labour Market Domain. - Panos Alexopoulos; Spyretta Leivaditi (SEMANTiCS (Workshops), 2017)