Anastasios Mantas, Filippos Yfantis, Dimitris Bilidas, George Stamoulis, Spyros Kondylatos, Ioannis
Prapas, Ioannis Papoutsis, José María Tárraga Habas, Eva Sevillano Marco, Fabien Castel, Camille
Laine and Manolis Koubarakis. Plato: A Semantic Data Cube System using Ontology-Based Data Access Technologies. IEEE Access
Journal, 9 September, 2024 [link]
Vasileios Saketos, Despina-Athanasia Pantazi and Manolis Koubarakis. The Large Language Model GreekLegalRoBERTa.
13th EETN Conference on Artificial Intelligence (SETN 2024), September 11-13, 2024, Piraeus, Greece,
[pdf]
Christine Kakalou, Christina Karamanidou, Theodore Dalamagas and Manolis Koubarakis. Enhancing Patient Empowerment and Graphs with Language Models for Personalized Health Content
Delivery.
34th Medical Informatics Europe Conference: Digital Health & Informatics Innovations for Sustainable
Health Care Systems, August 25-29, 2024 [pdf]
Franziska Neuhof, Marco Fisichella, George Papadakis, Konstantinos Nikoletos, Nikolaus Augsten,
Wolfgang Nejdl and Manolis Koubarakis. Open benchmark for filtering techniques in entity
resolution The VLDB Journal, July 9, 2024. [link]
Dimitris Bilidas, Anastasios Mantas, Filippos Yfantis, George Stamoulis and Manolis Koubarakis. Plato: Implementing a Semantic Data Cube System. 43rd European Association of Remote Sensing
Laboratories (EARSeL), June 17-20, 2024, Manchester, United Kingdom
Antonis Troumpoukis, Iraklis Klampanos, Despina-Athanasia Pantazi, Eleni Tsalapati, Mohanad
Albughdadi, Vasileios Baousis, Omar Barrilero, Alexandra Bojor,
Pedro Branco, Lorenzo Bruzzone, Andreina Chietera,
Philippe Fournand, Richard Hall, Michele Lazzarini, Adrian
Luna, Alexandros Nousias, Christos Perentis, George Petrakis, Dharmen Punjani, David Röbl, George
Stamoulis, Eleni Tsalapati, Indrė Urbanavičiūtė, Giulio Weikmann, Xenia Ziouvelou, Marcin
Ziółkowski, Manolis Koubarakis and Vangelis Karkaletsis.European AI and EO convergence via a
novel community-driven framework for data-intensive innovation Future Generation Computer
Systems Journal, June 10, 2024 [link]
Dimitris Bilidas, Anastasios Mantas, Filippos Yfantis, George Stamoulis, Manolis Koubarakis,
José María Tárraga Habas, Eva Sevillano Marco, Fabien Castel, Camille Laine. The Semantic Data Cube System Plato and Its Applications. IEEE International Geoscience and
Remote
Sensing Symposium (IGARSS '24),
July
7-12, 2024, Athens, Greece [pdf]
Marios Papamichalopoulos, George Papadakis, George Mandilaras, Maria Siampou, Nikos Mamoulis,
Manolis Koubarakis. Three-dimensional Geospatial Interlinking with JedAI-spatial. Journal of Web Semantics, Volume
81, July 2024 [pdf]
Christine Kakalou, Christina Karamanidou, Theodore Dalamagas and Manolis Koubarakis. Personalised Medical Content Delivery to Support Patient Empowerment based on Knowledge Graphs.
The 15th International SWAT4HCLS conference (SWAT4HCLS’24), February 26-29, 2024 [pdf]
2023
Vasilis Efthymiou, Ekaterini Ioannou, Manos Karvounis, Manolis Koubarakis, Jakub Maciejewski,
Konstantinos Nikoletos, George Papadakis, Dimitris Skoutas, Yannis Velegrakis, Alexandros
Zeakis. Self-configured Entity Resolution with pyJedAI. 2023
IEEE International Conference on Big Data (IEEE BigData) , Sorrento, Italy, 15-18 December 2023 [pdf]
Dimitris Bilidas, Anastasios Mantas, Filippos Yfantis, George Stamoulis, Manolis Koubarakis,
Spyros
Kondylatos, Ioannis Prapas, Ioannis Papoutsis. Fire Risk Management using Data Cubes, Machine Learning and OBDA systems (Demo Paper). The
31st
ACM International Conference on Advances in Geographic Information Systems (SIGSPATIAL '23),
November
13-16, 2023, Hamburg, Germany [pdf]
Maria Despoina Siampou, George Papadakis, Nikos Mamoulis, Manolis Koubarakis. Supervised Scheduling for Geospatial Interlinking. The
31st
ACM International Conference on Advances in Geographic Information Systems (SIGSPATIAL '23),
November
13-16, 2023, Hamburg, Germany [pdf]
Eleni Tsalapati and Manolis Koubarakis.SHM: A Light-weight, Mid-level Ontology for
Reliable System Health Monitoring. The 2nd International Workshop on Semantic
Industrial Information Modelling (SemIIM’23), 7th November 2023, Athens, Greece [pdf]
Eleni Tsalapati, Markos Iliakis and Manolis Koubarakis.Location Query Answering Using Box
Embeddings.
Workshop at ISWC 2023: Deep Learning for Knowledge Graphs, November 6-10, Athens, Greece [pdf]
Konstantinos Salmas, Despina-Athanasia Pantazi and Manolis Koubarakis.Extracting
geographic knowledge from large language models. KBC-LM’23: Knowledge Base Construction from
Pre-trained Language Models workshop at ISWC 2023, 7th November 2023, Athens, Greece [pdf]
Marco Corsi, Giorgio Pasquali, Chiara Pratola, Simone Tilia, Sergios-Anestis Kefalidis,
Konstantinos Plas, Mariangela Pollali, Eleni Tsalapati, Myrto Tsokanaridou, Manolis Koubarakis,
Kai Norman Clasen, Leonard Hackel, Jakob Hackstein, Gencer Sumbul, Begüm Demir and
Nicolas Longépé. DA4DTE: DEVELOPING A DIGITAL ASSISTANT FOR SATELLITE DATA ARCHIVES Conference on Big Data from
Space (BiDS23)
2023, Vienna, Austria, 6-9 November, 2023 [pdf]
Dimitris Bilidas, Anastasios Mantas, Filippos Yfantis, George Stamoulis and Manolis Koubarakis. Plato: A Semantic Data Cube Implementation using Ontology-Based Data Access Technologies (Poster)
Conference on Big Data from Space (BiDS23)
2023, Vienna, Austria, 6-9 November, 2023 [pdf]
Antonis Troumpoukis, Iraklis Klampanos, Despina-Athanasia Pantazi, Eleni Tsalapati, Mohanad
Albughdadi, Mihai Alexe, Vasileios Baousis, Omar Barrilero, Bryce Billière, Alexandra Bojor,
Pedro Branco, Lorenzo Bruzzone, Andreina Chietera,
Philippe Fournand, Richard Hall, David Hassan, Michele Lazzarini, Adrian
Luna, Dharmen Punjani, George Stamoulis, Giulio Weikmann, Marcin Ziółkowski,
Xenia Ziouvelou, Manolis Koubarakis and Vangelis Karkaletsis.Bridging
the European Earth-Observation and AI Communities for
Data-Intensive Innovation 2023 IEEE Ninth International Conference on Big Data Computing
Service
and Applications (BigDataService), Athens, Greece, 2023 [pdf]
Sergios-Anestis Kefalidis, Dharmen Punjani, Eleni Tsalapati, Konstantinos Plas, Mariangela
Pollali, Michail Mitsios, Myrto Tsokanaridou, Manolis Koubarakis, and Pierre Maret. Benchmarking Geospatial Question Answering Engines using the Dataset GeoQuestions1089 The
22nd International
Semantic Web Conference, Athens, Greece, 6-10 November, 2023 [pdf]
Ioannis Dravilas, Stavros Dafis, Georgios Kyros, Konstantinos Lagouvardos and Manolis
Koubarakis. Towards a Machine Learning Snowfall Retrieval Algorithm for GPM-IMERG The
16th International Conference on Meteorology, Climatology and Atmospheric Physics (COMECAP 2023),
Athens, Greece, 25-29 September, 2023 [pdf]
Dharmen Punjani, Sergios-Anestis Kefalidis, Konstantinos Plas, Eleni Tsalapati, Manolis
Koubarakis, and Pierre Maret.The Question Answering System GeoQA2. The 2nd
International Workshop on
Geospatial Knowledge Graphs and GeoAI: Methods, Models, and Resources, Leeds, UK, 12 September, 2023
[pdf]
Alexandros Zeakis, George Papadakis, Dimitrios Skoutas, Manolis Koubarakis.Pre-trained
Embeddings for Entity Resolution: An Experimental Analysis. The 49th International
Conference on Very Large Data Bases, Vancouver, Canada, August 28 - September 1, 2023
[pdf]
Dharmen Punjani, Manolis Koubarakis and Eleni Tsalapati.EarthQA: a question answering
engine for Earth observation data archives. The 43rd International Geoscience and Remote
Sensing
Symposium (IGARSS 2023), California, USA, 16-21 July, 2023 [pdf]
Manolis Koubarakis.Geospatial Data Science: A Hands-on Approach for Building Geospatial
Applications Using Linked Data Technologies. ACM Books 51, ACM 2023, ISBN 979-8-4007-0740-7 [link]
Sören Auer, Dante A. C. Barone, Cassiano Bartz, Eduardo G. Cortes, Mohamad Yaser Jaradeh, Oliver
Karras, Manolis Koubarakis, Dmitry Mouromtsev, Dmitrii Pliukhin, Daniil Radyush, Ivan Shilin,
Markus Stocker and Eleni Tsalapati. The SciQA Scientific Question Answering Benchmark
for Scholarly Knowledge. Sci Rep 13, 7240 (2023) [pdf]
Florian Appel, Heike Bach, Silke Migdall, Manolis Koubarakis, George Stamoulis, Dimitris Bilidas,
Despina-Athanasia Pantazi, Lorenzo Bruzzone, Giulio Weikmann.ExtremeEarth: Managing
Water
Availability for Crops Using Earth Observation and Machine Learning. The 26th International
Conference on Extending
Database Technology (EDBT2023). Ioannina, Greece, 28-31 March, 2023 [pdf]
Niloy Ganguly, Dren Fazlija, Maryam Badar, Marco Fisichella, Sandipan Sikdar, Johanna Schrader,
Jonas Wallat, Koustav Rudra, Manolis Koubarakis, Gourab K. Patro, Wadhah Zai El Amri, Wolfgang
Nejdl.A Review of the Role of Causality in Developing Trustworthy AI Systems. CoRR
abs/2302.06975 (2023) [pdf]
Alexandros Zeakis, George Papadakis, Dimitrios Skoutas, Manolis Koubarakis.Pre-trained
Embeddings for Entity Resolution: An Experimental Analysis [Experiment, Analysis & Benchmark].
CoRR abs/2304.12329 (2023) [pdf]
Koubarakis, M., Bereta, K., Nikolaou, C., Stamoulis, G.Linked Geospatial Data. In:
Zomaya,
A., Taheri, J., Sakr, S. (eds) Encyclopedia of Big Data Technologies. 2023, Springer, Cham.
[pdf]
2022
Alexandros Zeakis, Dimitrios Skoutas, Dimitris Sacharidis, Odysseas Papapetrou, Manolis
Koubarakis.TokenJoin: Efficient Filtering for Set Similarity Join with
Maximum Weighted Bipartite Matching. Proc. VLDB Endow. 16 (2022): 790-802. [pdf]
Konstantinos Nikoletos, George Papadakis and Manolis Koubarakis.pyJedAI: a Lightsaber for
Link Discovery. The 21st International
Semantic Web Conference, Virtual Conference, 23-27 October, 2022. Demo paper [pdf]
Dimitris Bilidas, Theofilos Ioannidis, Nikos Mamoulis and Manolis Koubarakis.Strabo 2:
Distributed Management of Massive Geospatial RDF Datasets. The 21st International
Semantic Web Conference, Virtual Conference, 23-27 October, 2022 [pdf]
Christine Kakalou, Pantelis Natsiavas, Theodore Dalamagas and Manolis Koubarakis.Medication
and Adverse Drug Events Information Extraction in Discharge Summaries to Enrich Discharge Medication
Instructions. IEEE-EMBS International Conference on Biomedical and Health Informatics (BHI),
27-30 September, 2022 [pdf]
Maria Despoina Siampou, Nikolaos Karalis and Manolis Koubarakis.Extending YAGO4 Knowledge
Graph with Geospatial Knowledge. 5th International Workshop on Geospatial Linked Data at
ESWC’22, Hersonissos, Greece, May 29 - June 2, 2022 [pdf]
Christos C. Papadopoulos, Yannis Panagakis, Manolis Koubarakis, Mihalis A. NicolaouEfficient Learning of Multiple NLP Tasks via Collective Weight Factorization on BERT. In 2022
Annual Conference of the North American Chapter of the Association for Computational Linguistics
(NAACL
2022). Findings. Seattle, USA, July 10–15, 2022. [pdf]
Manolis Koubarakis, Konstantina Bereta, Dimitris Bilidas, Despina-Athanasia Pantazi, George
StamoulisA Data Science Pipeline for Big Linked Earth Observation Data. In: Curry, E., Auer, S.,
Berre, A.J., Metzger, A., Perez, M.S., Zillner, S. (eds) Technologies and Applications for Big Data
Value . Springer, Cham [pdf]
George Papadakis, Georgios Mandilaras, Nikos Mamoulis, Manolis KoubarakisStatic and Dynamic Progressive Geospatial Interlinking. ACM Transactions on Spatial
Algorithms and Systems (TSAS), 2022 (to appear) [pdf]
2021
Christos Papaloukas, Ilias Chalkidis, Konstantinos Athinaios, Despina-Athanasia Pantazi and Manolis
KoubarakisMulti-granular Legal Topic Classification on Greek Legislation. NLLP Workshop 2021 in conjunction
with EMNLP2021, 10 November, 2021 [pdf]
Desta Haileselassie Hagos, Theofilos Kakantousis, Vladimir Vlassov, Sina Sheikholeslami, Tianze Wang,
Jim
Dowling, Claudia Paris, Daniele Marinelli, Giulio Weikmann, Lorenzo Bruzzone, Salman Khaleghian,
Thomas
Kræmer, Torbjørn Eltoft, Andrea Marinoni, Despina-Athanasia Pantazi, George Stamoulis, Dimitris
Bilidas,
George Papadakis, George Mandilaras, Manolis Koubarakis, Antonis Troumpoukis, Stasinos
Konstantopoulos, Markus Muerth, Florian Appel, Andrew Fleming, and Andreas CziferszkyExtremeEarth Meets Satellite Data From Space. IEEE Journal of Selected Topics in Applied Earth
Observations and Remote Sensing, 2021 [pdf]
George Mandilaras and Manolis KoubarakisScalable Transformation of Big Geospatial Data into Linked Data. The 20th International
Semantic Web Conference, Virtual Conference, 24-28 October, 2021 [pdf]
George Mandilaras, George Papadakis, Luca Gagliardelli, Giovanni Simonini, Emmanouil Thanos, George
Giannakopoulos, Sonia Bergamaschi, Themis Palpanas, Manolis Koubarakis, Alicia Lara-Clares, Antonio
FariñaReproducible experiments on Three-Dimensional Entity Resolution with JedAI.
Information Systems, Volume 102, December 2021 [link]
Desta Haileselassie Hagos, Theofilos Kakantousis, Vladimir Vlassov, Sina Sheikholeslami, Tianze
Wang, Jim Dowling, Andrew Fleming, Andreas Cziferszky, Markus Muerth, Florian Appel,
Despina-Athanasia Pantazi, Dimitris Bilidas, George Papadakis, George Mandilaras, George
Stamoulis, Manolis Koubarakis, Antonis Troumpoukis, Stasinos KonstantopoulosThe
ExtremeEarth Software
Architecture for Copernicus Earth Observation Data. Conference on Big Data from Space (BiDS21)
2021. Virtual
event, 18-20 May 2021 [pdf]
Manolis Koubarakis, George Stamoulis, Dimitris Bilidas, Theofilos Ioannidis, George Mandilaras,
Despina-Athanasia Pantazi, George Papadakis, Vladimir Vlassov, Amir H. Payberah, Tianze Wang,
Sina Sheikholeslami, Desta Haileselassie Hagos,
Lorenzo Bruzzone, Claudia Paris, Giulio Weikmann, Daniele Marinelli, Torbjørn Eltoft, Andrea
Marinoni, Thomas Kræmer, Salman Khaleghian, Habib Ullah, Antonis Troumpoukis, Nefeli Prokopaki
Kostopoulou, Stasinos Konstantopoulos, Vangelis Karkaletsis, Jim Dowling, Theofilos
Kakantousis, Mihai Datcu, Wei Yao, Corneliu Octavian Dumitru, Florian Appel, Silke Migdall,
Markus Muerth, Heike Bach, Nick Hughes, Alistair Everett, Ashild Kiærbech, Joakim Lillehaug
Pedersen, David Arthurs, Andrew Fleming, Andreas CziferszkyArtificial Intelligence and Big
Data Technologies for Copernicus Data: The ExtremeEarth Project. Conference on Big Data from
Space (BiDS21) 2021. Virtual
event, 18-20 May 2021 [pdf]
Ioannis Papoutsis, Alkyoni Baglatzi, Souzana Touloumtzi, Markus Reichstein, Nuno Carvalhais, Fabian
Gans, Gustau Camps-Valls, Maria Piles, Theofilos Kakantousis, Jim Dowling, Manolis Koubarakis,
Dimitris Bilidas, Despina-Athanasia Pantazi, George Stamoulis, Christophe Demange, Léo-Gad Journel,
Marco Bianchi, Chiara Gervasi, Alessio Rucci, Ioannis Tsampoulatidis, Eleni Kamateri, Tarek Habib,
Alejandro Diaz Bolivar, Zisoula Ntasiou, Anastasios PaschalisDeepCube: Explainable AI
Pipelines for Big Copernicus Data. Conference on Big Data from Space (BiDS21) 2021. Virtual
event, 18-20 May 2021 [pdf]
Dimitris Bilidas and Manolis Koubarakis.Handling redundant processing in OBDA query execution
over relational sources. Journal of Web Semantics. Volume 68, April 2021 [link][pdf]
George Papadakis, Georgios Mandilaras, Nikos Mamoulis, Manolis KoubarakisProgressive,
Holistic Geospatial Interlinking. The Web Conference 2021, April 19 - 23, Ljubljana, Slovenia,
2021. [pdf]
Theofilos Ioannidis, George Garbis, Kostis Kyzirakos, Konstantina Bereta and Manolis KoubarakisEvaluating Geospatial RDF stores Using the Benchmark Geographica 2. Journal on Data Semantics.
[pdf]
Konstantina Bereta, George Papadakis and Manolis KoubarakisOntop4theWeb: SPARQLing the Web
On-the-fly. The 15th IEEE International Conference on Semantic Computing (ICSC2021), 27-29
January, 2021. Short paper. [pdf]
Antonis Troumpoukis, Stasinos Konstantopoulos, Giannis Mouchakis, Nefeli Prokopaki-Kostopoulou,
Claudia Paris, Lorenzo Bruzzone, Despina-Athanasia Pantazi and Manolis KoubarakisGeoFedBench: A Benchmark for Federated GeoSPARQL Query Processors. The 19th International
Semantic Web Conference, Virtual Conference, 1-6 November, 2020 [pdf]
Manolis Koubarakis, Harith Alani, Grigoris Antoniou, Kalina Bontcheva, John G. Breslin, Diego
Collarana, Elena Demidova, Stefan Dietze, Simon Gottschalk, Guido Governatori, Aidan Hogan, Freddy
Lécué, Elena Montiel-Ponsoda, Axel-Cyrille Ngonga Ngomo, Sofia Pinto, Muhammad Saleem, Raphaël
Troncy, Eleni Tsalapati, Ricardo Usbeck, Ruben VerborghJoint Proceedings of Workshops
AI4LEGAL2020, NLIWOD, PROFILES 2020, QuWeDa 2020 and SEMIFORM2020 Colocated with the 19th
International Semantic Web Conference (ISWC 2020). Virtual Conference, November, 2020. [link]
Dimitris Bilidas and Manolis KoubarakisIn-memory parallelization of join queries over large
ontological hierarchies. Distributed and Parallel Databases 2020 [link]
George Papadakis, George Mandilaras, Luca Gagliardelli, Giovanni Simonini, Emmanouil Thanos, George
Giannakopoulos, Sonia Bergamaschi, Themis Palpanas, Manolis KoubarakisThree-Dimensional
Entity Resolution with JedAI. Journal of Information Systems. Volume 93, November 2020 [pdf]
George Mandilaras, Despina-Athanasia Pantazi, Manolis Koubarakis, Nick Hughes, Alistair Everett,
Ashild Kiærbech.Ice Monitoring With ExtremeEarth. LASCAR 2020 : 2nd Workshop on Large
Scale RDF Analytics, Virtual, 31st May, 2020 [pdf]
George Papadakis, Leonidas Tsekouras, Manos Thanos, Nikiforos Pittaras, Giovanni Simonini, Dimitrios
Skoutas, Paul Isaris, George Giannakopoulos, Themis Palpanas and Manolis Koubarakis.JedAI:
beyond batch, blocking-based Entity Resolution. The 23rd International Conference on Extending
Database Technology (EDBT2020). Copenhagen, Denmark, 30th March-2nd April, 2020 [pdf]
Manolis Koubarakis, Alexander Borgida, Panos Constantopoulos, Martin Doerr, Matthias Jarke, Manfred
A.Jeusfeld, John Mylopoulos and Dimitris Plexousakis.A retrospective on Telos as a
metamodeling language for requirements engineering. Requirements Engineering 2020 [pdf]
2019
George Papadakis, Leonidas Tsekouras, Emmanouil Thanos, George Giannakopoulos, Themis Palpanas and
Manolis Koubarakis.Domain- and Structure-Agnostic End-to-End Entity Resolution with JedAI.
Sigmod Record. December 2019 [pdf]
Konstantina Bereta, Guohui Xiao and Manolis Koubarakis.Ontop-spatial: Ontop of geospatial
databases. Journal of Web Semantics. Volume 58, October 2019 [pdf]
Nikolaos Karalis, Georgios Mandilaras and Manolis Koubarakis.Extending the YAGO2 Knowledge
Graph with Precise Geospatial Knowledge. The 18th International Semantic Web Conference
(ISWC-19). Auckland, New Zealand, 26-30 October‚ 2019 [pdf]
Themis Beris, Iosif Angelidis, Ilias Chalkidis, Charalampos Nikolaou, Christos Papaloukas, Panagiotis
Soursos and Manolis Koubarakis.Towards a Decentralised, Trusted, Intelligent and Linked
Public Sector. A Report from the Greek Trenches. Workshop on Linked Data on the Web and its
Relationship with Distributed Ledgers (LDOW/LDDL). San Francisco, USA, 13-14 May‚ 2019 [pdf]
Nikiforos Pittaras, George Papadakis, George Stamoulis, Giorgos Argyriou, Efi Karra Taniskidou,
Emmanouil Thanos, George Giannakopoulos and Manolis Koubarakis.GeoSensor: Semantifying
Change and Event Detection over Big Data. The 34th ACM/SIGAPP Symposium On Applied Computing
(SAC 2019). Limassol, Cyprus, 8-12 April‚ 2019 [pdf]
Dimitris Bilidas and Manolis Koubarakis.Scalable Parallelization of RDF Joins on Multicore
Architectures. The 22nd International Conference on Extending Database Technology (EDBT 2019).
Lisbon, Portugal, 26-29 March, 2019 [pdf]
Konstantina Bereta, Herve Caumont, Ulrike Daniels, Erwin Goor, Manolis Koubarakis, Despina-Athanasia
Pantazi, George Stamoulis, Sam Ubels, Valentijn Venus, Firman Wahyudi and Dirk Daems.The
Copernicus App Lab project: Easy Access to Copernicus Data. The 22nd International Conference on
Extending Database Technology (EDBT 2019). Lisbon, Portugal, 26-29 March, 2019 [pdf]
Manolis Koubarakis, Konstantina Bereta, Dimitris Bilidas, Konstantinos Giannousis, Theofilos
Ioannidis, Despina-Athanasia Pantazi, George Stamoulis, Jim Dowling, Seif Haridi, Vladimir Vlassov,
Lorenzo Bruzzone, Claudia Paris, Torbjørn Eltoft, Thomas Krämer, Angelos Charalabidis, Vangelis
Karkaletsis, Stasinos Konstantopoulos, Theofilos Kakantousis, Mihai Datcu, Corneliu Octavian
Dumitru, Florian Appel, Heike Bach, Silke Migdall, Nick Hughes, David Arthurs and Andrew
Fleming.From Copernicus Big Data to Extreme Earth Analytics. The 22nd International
Conference on Extending Database Technology (EDBT 2019). Lisbon, Portugal, 26-29 March, 2019. Short
visionary paper on the
goals of the ExtremeEarth project. [pdf]
Efi Karra Taniskidou, George Papadakis, George Giannakopoulos and Manolis Koubarakis.Comparative Analysis of Content-based Personalized Microblog Recommendations. The 22nd
International Conference on Extending Database Technology (EDBT 2019). Lisbon, Portugal, 26-29 March,
2019 [pdf]
Konstantina Bereta, Hervé Caumont, Ulrike Daniels, Daems Dirk, Manolis Koubarakis, Despina-Athanasia
Pantazi, George Stamoulis, Sam Ubels, Valentijn Venus, Firman Wahyudi.From Big Copernicus Data to Big Information and Big Knowledge: The Copernicus App Lab Project.
Conference on Big Data from Space (BiDS19) 2019, Munich, Germany, 19-21 February, 2019. [pdf]
Konstantina Bereta, Herve Caumont, Ulrike Daniels, Daems Dirk, Manolis Koubarakis, Despina-Athanasia
Pantazi, George Stamoulis, Sam Ubels, Valentijn Venus and Firman Wahyudi.Providing Satellite
Data to Mobile Developers Using Semantic Technologies and Linked Data. The 14th IEEE
International Conference on Semantic Computing (ICSC 2019). San Diego, USA, 3-5 February‚ 2019 [pdf]
2018
Konstantinos Giannousis, Konstantina Bereta, Nikolaos Karalis and Manolis Koubarakis.Distributed Execution of Spatial SQL Queries. 2018 IEEE International Conference on Big Data
(IEEE Big Data 2018). Seattle, USA, 10-13 December‚ 2018 [pdf]
Manolis Koubarakis, George A. Vouros, Georgios Chalkiadakis, Vassilis P. Plagianakos, Christos
Tjortjis, Ergina Kavallieratou, Dimitris Vrakas, Nikolaos Mavridis, Georgios Petasis, Konstantinos
Blekas and Anastasia Krithara.AI in Greece: The Case of Research on Linked Geospatial Data.
AI Magazine, Vol. 39(2), p. 91-96, 2018 [link]
Iosif Angelidis, Ilias Chalkidis and Manolis Koubarakis.Named Entity Recognition, Linking and
Generation for Greek Legislation. The 31st international conference on Legal Knowledge and
Information Systems (JURIX 2018). Groningen, The Netherlands, 12-14 December‚ 2018 [pdf]
Dimitris Bilidas and Manolis Koubarakis.Efficient Duplicate Elimination in SPARQL to SQL
Translation. 31st International Workshop on Description Logics (DL 2018). Arizona, USA, 27-29
October, 2018 [pdf]
Konstantina Bereta, George Papadakis and Manolis Koubarakis.Querying the Web On-the-fly Using
Ontologies and Mappings. 31st International Workshop on Description Logics (DL 2018). Arizona,
USA, 27-29 October, 2018 [pdf]
Konstantina Bereta, Hervé Caumont, Erwin Goor, Manolis Koubarakis, Despina-Athanasia Pantazi, George
Stamoulis, Sam Ubels, Valentijn Venus and Firman Wahyudi. From Copernicus Big Data to Big
Information and Big Knowledge: a Demo from the Copernicus App Lab Project. 27th ACM
International Conference on Information and Knowledge Management (CIKM 2018). Turin, Italy, 22-26
October, 2018 [pdf]
Best Demo Award
D. Punjani, K. Singh, A. Both, M. Koubarakis, I. Angelidis, K. Bereta, T. Beris,
D. Bilidas, T. Ioannidis, N. Karalis, C. Lange, D. Pantazi, C. Papaloukas and G. Stamoulis.Template-Based Question Answering over Linked Geospatial Data. Geographic Information Retrieval
(GIR 2018) workshop. Collocated with ACM SIGSPATIAL. Seattle, USA, 6 November, 2018 [pdf]
Iosif Angelidis, Ilias Chalkidis, Charalampos Nikolaou, Panagiotis Soursos and Manolis
Koubarakis.Nomothesia: A Linked Data Platform for Greek Legislation. MIREL workshop,
Luxembourg Logic for AI Summit (LuxLogAI 2018), Luxembourg, 17 September, 2018 [pdf]
Kostis Kyzirakos, Dimitrianos Savva, Ioannis Vlachopoulos, Alexandros Vasileiou, Nikolaos Karalis,
Manolis Koubarakis and Stefan Manegold.GeoTriples: Transforming geospatial data into RDF
graphs using R2RML and RML mappings. Journal of Web Semantics, Elsevier, forthcoming [link]
Manolis Koubarakis, Konstantina Bereta, Charalampos Nikolaou, George Stamoulis. Linked Geospatial
Data. In: Sherif Sakr and Albert Y. Zomaya (eds). Encyclopedia of Big Data Technologies.
Springer, 2018 [link]
George Papadakis, Leonidas Tsekouras, Emmanouil Thanos, George Giannakopoulos, Themis Palpanas and
Manolis Koubarakis.The return of JedAI: End-to-End Entity Resolution for Structured and
Semi-Structured Data.Very Large Databases Conference (VLDB), 2018, Rio de Janeiro, Brazil, 27-31
August, 2018 [pdf]
Konstantina Bereta, George Stamoulis and Manolis Koubarakis.Ontology-Based Data Access and
Visualization of Big Vector amd Raster Data.International Geoscience and Remote Sensing
Symposium (IGARSS) 2018, Valencia, Spain, 22-27 July, 2018 [pdf]
Themis Beris and Manolis Koubarakis.Modeling and Preserving Greek Government Decisions using
Semantic Web Technologies and Permissionless Blockchains.Extended Semantic Web Conference (ESWC)
2018, Heraklion, Greece, 3-7 June, 2018 [pdf]
Giorgos Argyriou, George Papadakis, George Stamoulis, Efi Karra Taniskidou, Nikiforos Pittaras,
George Giannakopoulos, Sergio Albani, Michele Lazzarini, Emanuele Angiuli, Anca Popescu, Argyros
Argyridis and Manolis Koubarakis.GeoSensor: On-line Scalable Change and Event Detection over
Big Data. The Web Conference 2018, Lyon, France, 23-27 April, 2018. Demo paper [pdf]
Manolis Koubarakis, Hervé Caumont, Ulrike Daniels, Erwin Goor, Lara König and Valentijn Venus.Copernicus App Lab: A Platform for Easy Data Access Connecting the Scientific Earth Observation
Community with Mobile Developers. The Web Conference 2018. Alternate track on International
Projects, Lyon, France, 23-27 April, 2018 [pdf]
2017
Konstantina Bereta and Manolis Koubarakis.Creating Virtual Semantic Graphs on top of Big Data
from Space. Conference on Big Data from Space (BiDS-17), Toulouse, France, 28-30 November, 2017
[pdf]
Manolis Koubarakis, Konstantina Bereta, George Papadakis, Dimitrianos Savva and George Stamoulis.Big, Linked Geospatial Data and Its Applications in Earth Observation. IEEE Internet Computing
Magazine, pages 87-91, July/August 2017 [pdf]
Stefan Burgstaller, Wolfgang Angermair, Fabian Niggemann, Silke Migdall, Heike Bach, Ioannis
Vlahopoulos, Dimitrianos Savva, Panayiotis Smeros, George Stamoulis, Konstantina Bereta and Manolis
Koubarakis.LEOpatra: A Mobile Application for Smart Fertilization Based on Linked Data.
8th International Conference on Information and Communication Technologies in Agriculture, Food &
Environment. September 21-24, 2017. Chania, Crete, Greece [pdf]
George Papadakis, Konstantina Bereta, Themis Palpanas and Manolis Koubarakis.Multi-core
Meta-blocking for Big Linked Data. Proceeding of Semantics 2017. September 11-14, 2017.
Amsterdam, The Netherlands [pdf]
Konstantina Bereta, Guohui Xiao and Manolis Koubarakis. Answering GeoSPARQL quereis over
relational data. 3rd European Conference on Free and Open Source Software for
Geospatial systems (FOSS4G-E ), Paris, France, 18 - 22 July, 2017 [pdf]
Sören Auer, Simon Scerri, Aad Versteden, Erika Pauwels, Angelos Charalambidis, Stasinos
Konstantopoulos, Jens Lehmann, Hajira Jabeen, Ivan Ermilov, Gezim Sejdiu, Andreas Ikonomopoulos,
Spyros Andronopoulos, Mandy Vlachogiannis, Charalambos Pappas, Athanasios Davettas, Iraklis A.
Klampanos, Efstathios Grigoropoulos, Vangelis Karkaletsis, Victor de Boer, Ronald Siebes, Mohamed
Nadjib Mami, Sergio Albani, Michele Lazzarini, Paulo Nunes, Emanuele Angiuli, Nikiforos Pittaras,
George Giannakopoulos, Giorgos Argyriou, George Stamoulis, George Papadakis, Manolis Koubarakis,
Pythagoras Karampiperis, Axel-Cyrille Ngonga Ngomo, Maria-Esther Vidal. The BigDataEurope
Platform – Supporting the Variety Dimension of Big Data. International Conference on
Web Engineering (ICWE), Rome, Italy, 5-8 June 2017 [pdf]
Ilias Chalkidis, Charalampos Nikolaou, Panagiotis Soursos and Manolis Koubarakis. Modeling and
Querying Greek Legislation using Semantic Web Technologies. Extended Semantic Web
Conference (ESWC), Portoroz, Slovenia, 28 May - 1 June, 2017 [pdf]
George Papadakis, Leonidas Tsekouras, Emmanouil Thanos, George Giannakopoulos, Themis Palpanas and
Manolis Koubarakis. JedAI: The Force behind Entity Resolution Extended Semantic
Web Conference (ESWC), Portoroz, Slovenia, 28 May - 1 June, 2017. Demo paper [pdf]
Evgeny Kharlamov, Dag Hovland, Martin G. Skjæveland, Dimitris Bilidas, Ernesto Jiménez-Ruiz, Guohui
Xiao, Ahmet Soylu, Davide Lanti, Martin Rezk, Dmitriy Zheleznyakov, Martin Giese, Hallstein Lie,
Yannis Ioannidis, Yannis Kotidis, Manolis Koubarakis, Arild Waaler. Ontology Based Data
Access in Statoil. Journal of Web Semantics. Volume 44, May 2017, Pages 3-36
L. Zervakis, C. Tryfonopoulos, S. Skiadopoulos and M. Koubarakis Query Reorganisation
Algorithms for Efficient Boolean Information Filtering In IEEE Transactions on
Knowledge and Data Engineering (TKDE) 29(2): 418-432, 2017 [pdf]
2016
Konstantina Bereta and Manolis Koubarakis. Ontop of Geospatial Databases .
International Semantic Web Conference (ISWC), Kobe, Japan, 17-21 October 2016 [pdf]
Konstantina Bereta, Guohui Xiao, Manolis Koubarakis, Martina Hodrius, Conrad Bielski, and Gunter
Zeug. Ontop-spatial: Geospatial Data Integration using GeoSPARQL-to-SQL Translation. International Semantic Web Conference (ISWC), Kobe, Japan, 17-21 October 2016. Demo paper [pdf]
George Papadakis , George Papastefanatos, Themis Palpanas , Manolis Koubarakis Boosting the
efficiency of large-scale entity resolution with enhanced meta-blocking In Big Data
Research, Vol. 5, Pages 1-22 [pdf]
Manolis Koubarakis, Kostis Kyzirakos, Charalampos Nikolaou, George Garbis, Konstantina Bereta, Roi
Dogani, Stella Giannakopoulou, Panayiotis Smeros, Dimitrianos Savva, George Stamoulis, Giannis
Vlachopoulos, Stefan Manegold, Charalampos Kontoes, Themistocles Herekakis, Ioannis Papoutsis, and
Dimitrios Michail Managing Big, Linked, and Open Earth-Observation Data Using the
TELEIOS/LEO software stack In IEEE Geoscience and Remote Sensing Magazine, Vol. 4, Issue 3, p.
23-37, September 2016 [pdf]
Lefteris Zervakis, Christos Tryfonopoulos, Spiros Skiadopoulos and Manolis Koubarakis.
Full-text Support for Publish/Subscribe Ontology Systems. Extended Semantic Web
Conference (ESWC), Heraklion, Crete, Greece, 29 May - 2 June 2016 [pdf]
Sergio Albani, Michele Lazzarini, Manolis Koubarakis, Efi Karra Taniskidou, George Papadakis,
Vangelis Karkaletsis, George Giannakopoulos. Integrating Remote and Social Sensing Data for a
Scenario on Secure Societies in a Big Data Platform. Living Planet Symposium 2016,
Prague, Czech Republic, May 2016
Panayiotis Smeros and Manolis Koubarakis Discovering Spatial and Temporal Links among RDF
Data. Linked Data on the Web Workshop (LDOW2016), 12 April 2016 [pdf]
Jon Blower, Maik Riechert, Nino Pace and Manolis Koubarakis.Big Data meets Linked Data: What
are the Opportunities? Conference on Big Data from Space (BiDS), Tenerife, Spain, March 2016 [pdf]
George Papadakis, George Papastefanatos, Themis Palpanas, Manolis Koubarakis. Scaling Entity
Resolution to Large, Heterogeneous Data with Enhanced Meta-blocking. International
Conference on Extending Database Technology (EDBT), Bordeaux, France, March 2016. [link]
Sergio Albani, Michele Lazzarini, Manolis Koubarakis, Efi Karra Taniskidou, George Papadakis,
Vangelis Karkaletsis, George Giannakopoulos. A Pilot for Big Data Exploitation in the Space
and Security Domain. Conference on Big Data from Space (BiDS), Tenerife, Spain, March
2016 [pdf]
Charalampos Nikolaou and Manolis Koubarakis. Querying incomplete information in RDF with
SPARQL. Artificial Intelligence, 2016.
Stefan Brüggemann, Konstantina Bereta, Guohui Xiao and Manolis Koubarakis. Ontology-based data
access for Maritime Security. In 13th Extended Semantic Web Conference (ESWC), Crete,
Greece, May 30- June 2, 2016.. [pdf]
M. Sioutis, J.-F. Condotta, and M. Koubarakis An Efficient Approach for Tackling Large Real
World Qualitative Spatial Networks International Journal of Artificial Intelligence
Tools, 2016.
2015
Daniela Espinoza-Molina, Member, IEEE, Charalampos Nikolaou, Corneliu Octavian Dumitru, Konstantina
Bereta, Manolis Koubarakis, Gottfried Schwarz, and Mihai Datcu, Fellow, IEEE.
Very-High-Resolution SAR Images and Linked Open Data Analytics Based on Ontologies. Selected Topics in Applied Earth Observations and Remote Sensing, Journal of IEEE, Vol. 8, Issue 4,
pages 1696-1708 [pdf]
Charalampos Nikolaou, Kallirroi Dogani, Konstantina Bereta, George Garbis, Manos Karpathiotakis,
Kostis Kyzirakos, Manolis Koubarakis. Sextant: Visualizing time-evolving linked geospatial
data. In Journal of Web Semantics, Vol. 35, No 01. [link]
D. Calvanese, M. Koubarakis and D. Toman Special Issue on Ontology-Based Data Access Journal of Web Semantics. Vol 33, 2015
2014
Manolis Koubarakis, Panayiotis Smeros, Charalampos Nikolaou, George Garbis, Konstantina Bereta,
Stella Giannakopoulou, Kallirroi Dogani, Maria Karpathiotaki, Ioannis Vlachopoulos, Dimitrianos
Savva, George Stamoulis, Kostis Kyzirakos,
Stefan Manegold, Bernard Valentin, Heike Bach, Fabian Niggemann, Philipp Klug, Wolfgang Angermair
and Stefan Burgstaller. Linked Open Data in the Earth Observation Domain: the Vision of
Project LEO. In the Proceedings of the 2014 Conference on Big Data from Space (BiDS
'14). ESA-ESRIN, Frascati, Italy, November 12-14, 2014. [pdf]
Jon Blower, Debbie Clifford, Pedro Goncalves, Manolis Koubarakis. The MELODIES Project:
Integrating diverse data using linked data and cloud computing. In the Proceedings of
the 2014 Conference on Big Data from Space (BiDS '14). ESA-ESRIN, Frascati, Italy, November 12-14, 2014.
[pdf]
Maria Karpathiotaki, Kallirroi Dogani, Manolis Koubarakis. Enabling Semantic Search for EO
Products: an Ontology Matching Approach. In the 9th International Workshop on Ontology
Matching (OM-2014), in conjuction with ISWC 2014. Riva del Garda, Trentino, Italy, October 20th, 2014.
[pdf]
Kostis Kyzirakos, Ioannis Vlachopoulos, Dimitrianos Savva, Stefan Manegold, Manolis Koubarakis.
GeoTriples: a Tool for Publishing Geospatial Data as RDF Graphs Using R2RML Mappings. In the Proceedings of the ISWC 2014 Posters & Demonstrations Track, pp 393-396. Riva del Garda,
Trentino, Italy, October 21th, 2014. [pdf]
Kostis Kyzirakos, Ioannis Vlachopoulos, Dimitrianos Savva, Stefan Manegold, Manolis Koubarakis.
GeoTriples: a Tool for Publishing Geospatial Data as RDF Graphs Using R2RML Mappings. Terra Cognita 2014, 6th International Workshop on the Foundations, Technologies and Applications of
the Geospatial Web, in conjuction with ISWC 2014. Riva del Garda, Trentino, Italy, October 19-23, 2014.
[pdf]
Manolis Koubarakis, Charalampos Nikolaou, George Garbis, Konstantina Bereta, Panayiotis Smeros,
Stella Gianakopoulou,
Kallirroi Dogani, Maria Karpathiotaki, Ioannis Vlachopoulos, Dimitrianos Savva, Kostis Kyzirakos,
Stefan Manegold, Bernard Valentin,
Nicolas James, Heike Bach, Fabian Niggemann, Philipp Klug, Wolfgang Angermair, Stefan Burgstaller.
Linked Open Data in the Earth Observation Domain: the Vision of Project LEO. In the
Web Reasoning and Rule Systems conference (RR 2014). Athens, Greece, 15-17 September 2014. [pdf]
Manolis Koubarakis, Giorgos B. Stamou, Giorgos Stoilos, Ian Horrocks, Phokion G. Kolaitis, Georg
Lausen, Gerhard Weikum (Eds.). Reasoning Web.
Reasoning on the Web in the Big Data Era. Proceedings of the 10th International
Summer School 2014. Lecture Notes in Computer Science 8714, Springer 2014, ISBN 978-3-319-10586-4
Athens, Greece, September 8-13, 2014.
Stella Giannakopoulou, Charalampos Nikolaou, Manolis Koubarakis. A Reasoner for the RCC-5 and
RCC-8 Calculi Extended with Constants. In the Proceedings of the 28th AAAI Conference
on Artificial Intelligence, pp. 2659-2665. Quebec City, Quebec, Canada, July 27-31, 2014. [pdf]
Charalampos Nikolaou, Manolis Koubarakis. Fast Consistency Checking of Very Large Real-World
RCC-8 Constraint Networks Using Graph Partitioning. In the Proceedings of the 28th AAAI
Conference on Artificial Intelligence, pp. 2724-2730. Quebec City, Quebec, Canada, July 27-31, 2014. [pdf]
Maria Karpathiotaki, Kallirroi Dogani, Manolis Koubarakis, Bernard Valentin, Paolo Mazzetti, Mattia
Santoro, Sabina Di Franco. Prod-Trees: Semantic Search for Earth Observation Products. The Semantic Web: ESWC 2014 Satellite Events. Lecture Notes in Computer Science, pp 374-378.
Anissaras, Crete, Greece, May 25-29, 2014. [pdf]
Ioannis Vlachopoulos, Stavros Vassos, Manolis Koubarakis. Flexible Behavior for Worker Units
in Real-Time Strategy Games Using STRIPS Planning. In the Proceedings of Artificial
Intelligence: Methods and Applications. Lecture Notes in Computer Science Volume 8445, 2014, pp 555-568.
SETN 2014, Ioannina, Greece, May 15-17, 2014.[pdf]
C. Nikolaou, K. Kyzirakos, K. Bereta, K. Dogani, S. Giannakopoulou, P. Smeros, G. Garbis, M.
Koubarakis, D. E. Molina, O. C. Dumitru, G. Schwarz and M. Datcu. Improving knowledge
discovery from synthetic aperture radar images using the linked open data cloud and Sextant. Informal Proceedings of the Image Information Mining Conference: The Sentinels Era (ESA-EUSC-JRC
2014). Bucharest, Romania, 5-7 March, 2014. [pdf]
M. Koubarakis. Linked Open Earth Observation Data: The LEO Project. Informal
Proceedings of the Image Information Mining Conference: The Sentinels Era (ESA-EUSC-JRC 2014).
Bucharest, Romania, 5-7 March, 2014. [pdf]
M. Koubarakis, K. Kyzirakos, C. Nikolaou, G. Garbis, K. Bereta, P. Smeros, S. Gianakopoulou, K.
Dogani, M. Karpathiotaki and I. Vlachopoulos. Linked Earth Observation Data:The Projects
TELEIOS and LEO. In the Linking Geospatial Data Conference (LGD 2014). Campus London,
Shoreditch. 5-6 March 2014. [pdf]
K. Kyzirakos, M. Karpathiotakis, G. Garbis, C. Nikolaou, K. Bereta, I. Papoutsis, T. Herekakis, D.
Michail, M. Koubarakis and C. Kontoes. Wildfire monitoring using satellite images, ontologies
and linked geospatial data. In Journal of Web Semantics, Vol. 24, No 05. 22 January
2014. Journal. [pdf]
K. Kyzirakos, S. Manegold, C. Nikolaou and M. Koubarakis. Building Virtual Earth Observatories
Using Scientific Database and Semantic Web Technologies. In the European Research
Consortium for Informatics and Mathematics News. January 2014. [link]
C. Tryfonopoulos, S. Idreos, M. Koubarakis, and P. Raftopoulou. Distributed Large-Scale
Information Filtering. In LNCS Transactions on Large-Scale Data- and Knowledge-Centered
Systems (TLDKS), Springer. 2014. [pdf]
Charalampos Nikolaou, Kostis Kyzirakos, Konstantina Bereta, Kallirroi Dogani, Stella Giannakopoulou,
Panayiotis Smeros, George Garbis, Manolis Koubarakis, Daniela Espinoza-Molina, Corneliu Octavian
Dumitru, Gottfried Schwarz, Mihai Datcu Big, Linked and Open Data: Applications in the German
Aerospace Center ESWC (Satellite Events) 2014, Lecture Notes in Computer Science, pp.
444-449
M. Giese, D. Calvanese, P. Haase, I. Horrocks, T. Hubauer, Y. Ioannidis, H. Kllapi, M. Koubarakis,
Maurizion Lenzerini, R. Moller, M. Rodriguez Muro, O. Ozcep, R. Rosatti, R. Schlatte, M. Schmidt, A.
Soylu and A. Waaler. Scalable End-User Access to Big Data. In: R. Arkekar (ed.)
Big Data Computing. CRC Press, 2014.
2013
G. Garbis, K. Kyzirakos and M. Koubarakis. Geographica: A Benchmark for Geospatial RDF Stores.
In the 12th International Semantic Web Conference (ISWC 2013). Sydney, Australia. October
21-25, 2013. [pdf]
Konstantina Bereta, Charalampos Nikolaou, Manos Karpathiotakis, Kostis Kyzirakos, and Manolis
Koubarakis. SexTant: Visualizing Time-Evolving Linked Geospatial Data. In the
12th International Semantic Web Conference (ISWC 2013). Sydney, Australia. October 21-25, 2013. Demo
paper. [pdf]
Kostis Kyzirakos, Manos Karpathiotakis, Konstantina Bereta, George Garbis, Charalampos Nikolaou,
Panayiotis Smeros, Stella Giannakopoulou, Kallirroi Dogani, and Manolis Koubarakis. The
Spatiotemporal RDF Store Strabon. In the 13th International Symposium on Spatial and
Temporal Databases (SSTD 2013). Munich, Germany, August 21-23, 2013. Demo paper. [pdf]
Charalampos Nikolaou and Manolis Koubarakis. Querying Incomplete Geospatial Information in
RDF. In the 13th International Symposium on Spatial and Temporal Databases (SSTD 2013).
Munich, Germany, August 21-23, 2013. [pdf]
Charalampos Nikolaou and Manolis Koubarakis. Incomplete Information in RDF. In
the 7th International Conference on Web Reasoning and Rule Systems (RR 2013). Mannheim, Germany. July
27-29, 2013. [pdf]
K. Bereta, P. Smeros and M. Koubarakis. Representing and Querying the valid time of triples
for Linked Geospatial Data. In the 10th Extended Semantic Web Conference (ESWC 2013).
Montpellier, France. May 26-30, 2013. [pdf]
C. Nikolaou, K. Dogani, K. Kyzirakos and M. Koubarakis. Sextant: Browsing and Mapping the
Ocean of Linked Geospatial Data. In the 10th Extended Semantic Web Conference (ESWC
2013). Montpellier, France. May 26-30, 2013. Demo paper. [pdf]
D. Calvanese, M. Giese, P. Haase, I. Horrocks, T. Hubauer, Y. Ioannidis, E. Jiménez-Ruiz, E.
Kharlamov, H. Kllapi, J. Klüwer, M. Koubarakis, S. Lamparter, R. Möller, C. Neuenstadt, T.
Nordtveit, Ö. Özcep, R. M. driguez Muro, M. Roshchin, M. Ruzzi, F. Savo, M. Schmidt, A. Soylu, A.
Waaler, and D. Zheleznyakov. Optique: OBDA Solution for Big Data. In Poster
track of the Extended Semantic Web Conference (ESWC 2013). Montpellier, France. May 26-30, 2013. Poster.
[pdf]
D. Calvanese, M. Giese, P. Haase, I. Horrocks, T. Hubauer, Y. Ioannidis, E. Jiménez-Ruiz, E.
Kharlamov, H. Kllapi, J. Klüwer, M. Koubarakis, S. Lamparter, R. Möller, C. Neuenstadt, T.
Nordtveit, Ö. Özcep, R. M. driguez Muro, M. Roshchin, M. Ruzzi, F. Savo, M. Schmidt, A. Soylu, A.
Waaler, and D. Zheleznyakov. The Optique Project: Towards OBDA Systems for Industry. In OWL Experiences and Directions Workshop (OWLED 2013). Montpellier, France. May 26-30, 2013. Short
paper. [pdf]
H. Kllapi, D. Bilidas, I. Horrocks, Y. Ioannidis, E. Jiménez-Ruiz, E. Kharlamov, M. Koubarakis, and
D. Zheleznyakov. Distributed Query Processing on the Cloud: the Optique Point of View. In OWL Experiences and Directions Workshop (OWLED 2013). Montpellier, France. May 26-30, 2013.
Short paper. [pdf]
I. Horrocks, T. Hubauer, E. Jiménez-Ruiz, E. Kharlamov, M. Koubarakis, R. Möller, K. Bereta, C.
Neuenstadt, Ö. Özçep, M. Roshchin, P. Smeros, and D. Zheleznyakov. Addressing Streaming and
Historical Data in OBDA Systems: Optique’s Approach. In Workshop on Knowledge Discovery
and Data Mining Meets Linked Open Data (Know@LOD 2013). Montpellier, France. May 26-30, 2013. [pdf]
Paolo Mazzetti, Bernard Valentin, Manolis Koubarakis, and Stefano Nativi. Extending netCDF and
CF conventions to support enhanced Earth Observation Ontology services: the Prod-Trees project. In the European Geosciences Union (EGU) General Assembly. Vienna, Austria. April 07-12 2013.
Poster.
M. Koubarakis, C. Kontoes, S. Manegold, M. Karpathiotakis, K. Kyzirakos, K. Bereta, G. Garbis, C.
Nikolaou, D. Michail, I. Papoutsis, T. Herekakis, M. Ivanova, Y. Zhang, H. Pirk, M. Kersten, K.
Dogani, S. Giannakopoulou and P. Smeros. Real-Time Wildfire Monitoring Using Scientific
Database and Linked Data Technologies. In the 16th International Conference on
Extending Database Technology (EDBT 2013). Genoa, Italy. March 18-22, 2013. [pdf]
Z. Kaoudi and M. Koubarakis. Distributed RDFS Reasoning Over Structured Overlay Networks. In Journal on Data Semantics. [link]
2012
K. Kyzirakos, M. Karpathiotakis and M. Koubarakis. Strabon: A Semantic Geospatial DBMS. In the 11th International Semantic Web Conference (ISWC 2012). November 11-15, 2012. Boston,
USA. [pdf]
K. Kyzirakos, M. Karpathiotakis, G. Garbis, C. Nikolaou, K. Bereta, M. Sioutis, I. Papoutsis, T.
Herekakis, D. Michail, M. Koubarakis, and C. Kontoes. Real Time Fire Monitoring Using
Semantic Web and Linked Data Technologies. In the 11th International Semantic Web
Conference (ISWC 2012). November 11-15, 2012. Boston, USA. Demo Paper. [pdf]
C. Nikolaou and M. Koubarakis. Querying Linked Geospatial Data with Incomplete Information.
In the 5th International Terra Cognita Workshop 2012 - Foundations, Technologies and
Applications of the Geospatial Web. In conjunction with the 11th International Semantic Web Conference.
November 11-15, 2012. Boston, USA. [pdf]
M. Sioutis and M. Koubarakis. Consistency of Chordal RCC-8 Networks. In the 24th
IEEE International Conference on Tools with Artificial Intelligence. November 7-9, 2012. Athens, Greece.
[pdf]
Dave Kolas, Matthew Perry, Rolf Grütter and Manolis Koubarakis. Proceedings of the
workshop: "Terra Cognita 2012: Foundations, Technologies and Applications of the Geospatial Web".
In conjunction with the 11th International Semantic Web Conference (ISWC 2012). Boston,
USA. November 12, 2012. Available at http://ceur-ws.org/Vol-901.
M. Koubarakis, M. Sioutis, K. Kyzirakos, M. Karpathiotakis, C. Nikolaou, S.Vassos, G. Garbis, K.
Bereta, M. Datcu, G. Schwarz, O.C. Dumitru, D.E. Molina and K. Molch. Building Virtual Earth
Observatories Using Ontologies, Linked Geospatial Data and Knowledge Discovery Algorithms. Informal Proceedings of the Image Information Mining Conference: Knowledge Discovery from Earth
Observation Data (ESA-EUSC-JRC 2012). October 24-26, 2012. Oberpfaffenhofen, Germany. [pdf]
M. Koubarakis, K. Kyzirakos, M. Karpathiotakis, C. Nikolaou, S. Vassos, G. Garbis, M. Sioutis, K.
Bereta, C. Kontoes, I. Papoutsis, T. Herekakis, D. Michail, S. Manegold, M. Kersten, M. Ivanova, H.
Pirk, Y. Zhang, M. Datcu, G. Schwarz, O. C. Dumitru, D. E. Molina, K. Molch, U. D. Giammatteo, M.
Sagona, S. Perelli, T. Reitz, E. Klien and R. Gregor. Building Remote Sensing Applications
Using Scientific Database and Semantic Web Technologies. Informal Proceedings of the
Image Information Mining Conference: Knowledge Discovery from Earth Observation Data (ESA-EUSC-JRC
2012). October 24-26, 2012. Oberpfaffenhofen, Germany. [pdf]
M. Koubarakis, M. Karpathiotakis, K. Kyzirakos, C. Nikolaou, S. Vassos, G. Garbis, M. Sioutis, K.
Bereta, S. Manegold, M. Kersten, M. Ivanova, H. Pirk, Y. Zhang, C. Kontoes, I. Papoutsis, T.
Herekakis, D. Mihail, M. Datcu, G. Schwarz, O. Dumitru, D. Molina, K. Molch, U. Giammatteo, M.
Sagona, S. Perelli, E. Klien, T. Reitz, and R. Gregor. Building Virtual Earth Observatories
using Ontologies and Linked Geospatial Data. In the 6th International Conference on Web
Reasoning and Rule Systems (RR 2012). September 10-12, 2012. Vienna, Austria. Short paper. [pdf]
M. Koubarakis, M. Sioutis, K. Kyzirakos, M. Karpathiotakis, C. Nikolaou, S. Vassos, G. Garbis, K.
Bereta, O. C. Dumitru, D. E. Molina, K. Molch, G. Schwarz, and M. Datcu. Building Virtual
Earth Observatories using Ontologies, Linked Geospatial Data and Knowledge Discovery Algorithms.
In the 11th International Conference on Ontologies, DataBases, and Applications of
Semantics (ODBASE 2012). September 11-12, 2012. Roma, Italy. [pdf]
M. Koubarakis, M. Karpathiotakis, K. Kyzirakos, C. Nikolaou, and M. Sioutis. Data Models and
Query Languages for Linked Geospatial Data. Invited tutorial at the 8th Reasoning Web
Summer School 2012 (RW 2012). September 3-8, 2012. Austria, Vienna. In: Eiter, T., Krennwallner, T.
(eds.) Reasoning Web. Semantic Technologies for Advanced Query Answering. Lecture Notes in Computer
Science, vol. 7487, pp. 290328. Springer. [pdf]
I. Miliaraki and M. Koubarakis. FoXtrot: Distributed Structural and Value XML filtering. In the ACM Transactions on the Web (TWEB). September 2012. [pdf]
Almpanoudi Ira, Bampatzia Stavroula, Antoniou Angeliki, Lepouras Georgios, Koubarakis Manolis.
An educational application for the Sanctuary of Artemis at Brauron. In 8th
Pan-Hellenic Conference "ICT in Education". 28-30 September 2012, University of Thessaly, Volos, Greece.
[pdf in greek]
M. Koubarakis, K. Kyzirakos, M. Karpathiotakis, C. Nikolaou, S. Vassos, G. Garbis, M. Sioutis,
Konstantina Bereta, D. Michail, C. Kontoes, I. Papoutsis, T. Herekakis, S. Manegold, M. Kersten, M.
Ivanova, H. Pirk, Y. Zhang, M. Datcu, G. Schwarz, C. Dumitru, D. E. Molina, K. Molch, U. D.
Giammatteo, M. Sagona, S. Perelli, T. Reitz, E. Klien, R. Gregor. TELEIOS: A Database-Powered
Virtual Earth Observatory. In the 38th International Conference on Very Large Databases
(VLDB 2012). August 27-31, 2012. Istanbul, Turkey. Demo Paper. [pdf]
C. Kontoes, I. Keramitsoglou, I. Papoutsis, D. Michail, T. Herekakis, P. Xofis, M. Koubarakis, K.
Kyzirakos, M. Karpathiotakis, C. Nikolaou, M. Sioutis, G Garbis, S. Vassos, S. Manegold, M. Kersten,
H. Pirk, M. Ivanova. Operational Wildfire Monitoring and Disaster Management Support Using
State-of-the-art EO and Information Technologies. In 2nd International Workshop on
Earth Observation and Remote Sensing Applications (EORSA 2012). June 8-11, 2012. Shangai, China. [pdf]
Lefteris Zervakis, Christos Tryfonopoulos, Antionios Papadakis-Pesaresi, Manolis Koubarakis, and
Spiros Skiadopoulos. Full-text Support for Publish/Subscribe Ontology Systems, 9th Extended Semantic Web Conference (ESWC 2012). Heraklion, Crete, Greece. May 27th -
31st, 2012. Poster. [pdf]
V. Anastassiou, P. Diamantopoulos, S. Vassos and M. Koubarakis. iThink: A Library for
Classical Planning in Video-games. In LNCS 7297, Artificial Intelligence: Theories and
Applications - Proceedings of the 7th Hellenic Conference on Artificial Intelligence (SETN) Lamia,
Greece. May, 2012. [pdf]
C. Kontoes, I. Papoutsis, D. Michail, T. Herekakis, M. Koubarakis, K. Kyzirakos, M.Karpathiotakis, C.
Nikolaou, M. Sioutis, G. Garbis, S. Vassos, I. Keramitsoglou, M. Kersten, S. Manegold, and H. Pirk.
Wildfire monitoring via the integration of remote sensing with innovative information
technologies. In EGU General Assembly 2012. April 22-27, 2012. Vienna, Austria.
Abstract. [pdf]
2011
Rolf Grütter, Dave Kolas, Manolis Koubarakis and Dieter Pfoser (eds.) Proceedings of the
workshop "Terra Cognita 2011: Foundations, Technologies and
Applications of the Geospatial Web". In conjunction with the International Semantic Web
Conference (ISWC2011). Bohn, Germany. October 23, 2011. CEUR Workshop Proceedings. Available at http://ceur-ws.org/Vol-798/.
Alasdair J. G. Gray, Raúl García-Castro, Kostis Kyzirakos, Manos Karpathiotakis,
Jean-Paul Calbimonte, Kevin Page, Jason Sadler, Alex Frazer, Ixent Galpin, Alvaro A. A. Fernandes,
Norman W. Paton, Oscar Corcho, Manolis Koubarakis, David De Roure, Kirk Martinez and Asunción
Gómez-Pérez. A Semantically Enabled Service Architecture for Mashups over
Streaming and Stored Data. In 8th Extended Semantic Web Conference (ESWC 2011).
Heraklion, Crete, May 20 - June 2, 2011. [pdf]
Manolis Koubarakis, Kostis Kyzirakos, Manos Karpathiotakis, Charalampos Nikolaou, Michael Sioutis,
Stavros Vassos, Dimitrios Michail, Themistoklis Herekakis, Charalampos Kontoes and Ioannis
Papoutsis. Challenges for Qualitative Spatial Reasoning in Linked Geospatial Data. In Proceedings of IJCAI 2011 Workshop on Benchmarks and Applications of Spatial Reasoning.
Barcelona, Spain, July 17, 2011. [pdf]
A. Katifori, C. Nikolaou, M. Platakis, Y. Ioannidis, A. Tympas, M. Koubarakis, N. Sarris, V.
Tountopoulos, E. Tzoanos, S. Bykau, N. Kiyavitskaya, C. Tsinaraki, Y. Velegrakis. The Papyrus
Digital Library: Discovering History in the News. Proceeding of the International
Conference on Theory and Practice of Digital Libraries (TPDL 2011). Berlin, Germany, September, 2011,
Demo paper. [pdf]
A.J.G. Gray, J. Sadler, O. Kit, K. Kyzirakos, M. Karpathiotakis, J.-P. Calbimonte, K. Page, R.
García-Castro, A. Frazer, I. Galpin, A.A.A. Fernandes,N.W. Paton, O. Corcho, M. Koubarakis,
D.D. Roure, K. Martinez, A. Góoacute;mez-Pérez. A Semantic Sensor Web for
Environmental Decision Support Applications. Sensors. 11, 8855-8887. [pdf]
2010
Zoi Kaoudi, Kostis Kyzirakos, and Manolis Koubarakis. SPARQL Query Optimization on Top of
DHTs. In 9th International Semantic Web Conference (ISWC 2010). Shangai, China,
November 7-11, 2010. [pdf]
Zoi Kaoudi, Manolis Koubarakis, Kostis Kyzirakos, Iris Miliaraki, Matoula Magiridou and Antonios
Papadakis-Pesaresi. Atlas: Storing, updating and querying RDF(S) data on top of DHTs. Web Semantics: Science, Services and Agents on the World Wide Web Journal of Web Semantics. Vol.
8, Issue 4, pages 271-277, 2010. [link]
Kostis Kyzirakos, Manos Karpathiotakis and Manolis Koubarakis. Developing Registries for the
Semantic Sensor Web using stRDF and stSPARQL (short paper). 3rd International workshop
on Semantic Sensor Networks 2010, in conjunction with ISWC 2010, November 2010, Shanghai, China. [pdf]
Iris Miliaraki and Manolis Koubarakis. Distributed Structural and Value XML Filtering. Proceedings of the 4th ACM International Conference on Distributed Event-Based Systems (DEBS
2010). Cambridge, United Kingdom, July 12-15, 2010. [pdf]
Manolis Koubarakis and Kostis Kyzirakos. Modeling and Querying Metadata in the Semantic Sensor
Web: the Model stRDF and the Query Language stSPARQL. In 7th Extended Semantic Web
Conference (ESWC 2010). Heraklion, Crete, 30 May - 03 June, 2010. [pdf]
Manolis Platakis, Charalampos Nikolaou, Akrivi Katifori, Manolis Koubarakis and Yannis Ioannidis.
Browsing news archives from the perspective of history: the Papyrus browser historiographical
issues view. 11th International Workshop on Image Analysis for Multimedia Interactive
Services (WIAMIS 2010). Desenzano del Garda, Italy. [pdf]
2009
Oscar Corcho, Manfred Hauswirth and Manolis Koubarakis (eds). Proceedings of the 1st Workshop
on the Semantic Sensor Web (SemSensWeb2009). Collocated with the Extended Semantic Web
Conference 2009. Heraklion, Crete, Greece. June 1st, 2009. CEUR Workshop Proceedings.
Available at http://ceur-ws.org/Vol-468/.
C. Tryfonopoulos, M. Koubarakis and Y. Drougas. Information Filtering and Query Indexing for
an Information Retrieval Model. ACM Transactions on Information Systems , Vol. 27, No.
2, 2009. [pdf]
V. K. Chaudhri, I. Jurisica, M. Koubarakis, D. Plexousakis and T. Topaloglou. The KBMS project
and beyond. In "Conceptual Modeling: Foundations and Applications. Essays in Honor of
John Mylopoulos", Lecture Notes in Computer Science 5600, pages 467-482, Springer, 2009. [pdf]
2008
Zoi Kaoudi, Iris Miliaraki and Manolis Koubarakis. RDFS Reasoning and Query Answering on Top
of DHTs. In 7th International Semantic Web Conference (ISWC 2008). Karlsruhe, Germany,
October 26-30, 2008. [pdf]
Christian Zimmer, Christos Tryfonopoulos, Klaus Berberich, Manolis Koubarakis, and Gerhard Weikum.
Approximate Information Filtering in Peer-to-Peer Networks. Proceedings of the 9th
International Conference on Web Information Systems Engineering (WISE 2008). Lecture Notes in Computer
Science, vol. 5175, pages 6-19, Springer. September 1-2, Auckland, New Zealand. [pdf]
Sean Bechhofer, Manfred Hauswirth, Joerg Hoffmann and Manolis Koubarakis (eds). The Semantic Web:
Research and Applications. Proceedings of the 5th European Semantic Web
Conference, ESWC 2008, Tenerife, Canary Islands, Spain, June 1-5, 2008. Lecture Notes in Computer
Science volume 5021, Springer.
Iris Miliaraki, Zoi Kaoudi and Manolis Koubarakis. XML Data Dissemination using Automata on
top of Structured Overlay Networks. Proceedings of the 17th International World Wide
Web Conference (WWW 2008), Beijing, China, April 21-25, 2008.[pdf]
S. Idreos, E. Liarou and M. Koubarakis. Continuous Multiway Joins over Distributed Hash
Tables. In Proceedings of 11th International Conference on Extending Database
Technology (EDBT 2008). March 25-30 2008, Nantes, France. [pdf]
2007
Erietta Liarou, Stratos Idreos and Manolis Koubarakis. Continuous RDF Query Processing over
DHTs. Proceedings of the 6th International Semantic Web Conference (ISWC). Busan,
Korea. November 11-15, 2007. [pdf]
Christian Zimmer, Christos Tryfonopoulos, Klaus Berberich, Gerhard
Weikum and Manolis Koubarakis. Node Behavior Prediction for Large-Scale Approximate
Information Filtering. In Proceedings of the International Workshop on Large-Scale
Distributed Systems for Information Retrieval (LSDS-IR), Amsterdam, The Netherlands, July 2007. [pdf]
Z. Kaoudi, I. Miliaraki, M. Magiridou, E. Liarou, S. Idreos, M. Koubarakis, Semantic Grid
Resource Discovery using DHTs in Atlas. In "Knowledge and Data Management in Grids", Talia Domenico, Bilas Angelos, and
Dikaiakos Marios D.(editors), Springer, 2007. [pdf]
E. Liarou, S. Idreos and M. Koubarakis, Evaluating Conjunctive Triple Pattern Queries over
Large
Structured Overlay Networks, Proceedings of the 5th International Semantic Web
Conference (ISWC), Athens, GA, USA, November 5-9, 2006 [pdf]
Klaus Berberich, Manolis Koubarakis, Christos Tryfonopoulos, Gerhard Weikum, Christian Zimmer,
MAPS: Approximate Publish/Subscribe Functionality in Peer-to-Peer Networks, in
Proceedings of Advanced Data Processing in Ubiquitous Computing Workshop (ADPUC), Melbourne, Australia,
November 2006 [pdf].
M. Koubarakis. Temporal CSPs. Chapter 19 of Handbook of
Constraint Programming, F. Rossi, P. Van Beek and T. Walsh (eds.). Elsevier, August 2006. [pdf]
Z. Kaoudi, I. Miliaraki, M. Magiridou, A. Papadakis-Pesaresi and
M. Koubarakis, Storing and Querying RDF Data in Atlas, 3rd European Semantic Web
Conference, 11 - 14 June 2006, Budva, Montenegro, Demo paper. [pdf]
Stratos Idreos, Christos Tryfonopoulos, Manolis Koubarakis, Distributed Evaluation of
Continuous Equi-join Queries over Large Structured Overlay Networks. In Proceedings of
the 22nd International Conference on Data Engineering (ICDE), Atlanta, USA, April 2006. [pdf]
M. Koubarakis, I. Miliaraki, Z. Kaoudi, M. Magiridou and A. Papadakis-Pesaresi, Semantic Grid
Resource Discovery using DHTs in Atlas, 3rd GGF Semantic Grid Workshop, 13-16 February
2006, Athens, Greece. [pdf]
P.-A. Chirita, S. Idreos, M. Koubarakis, and W. Nejdl. Designing Semantic Publish/Subscribe
Networks Using Super-Peers. In "Semantic Web and Peer-to-Peer", Steffen Staab and Heiner Stuckenschmidt
(editors), Springer, 2006. [pdf]
2005
Matoula Magiridou, Stavros Sahtouris, Vassilis Christophides and Manolis Koubarakis, RUL: A
Declarative Update Language for RDF, In Proceedings of the 4th International Semantic
Web Conference (ISWC), Galway, Ireland, November 6-10, 2005. [pdf]
Christos Tryfonopoulos, Stratos Idreos, and Manolis Koubarakis, LibraRing: An Architecture for
Distributed Digital Libraries Based on DHTs. In Proceedings of the 9th European
Conference on Research and Advanced Technology for Digital Libraries (ECDL), pages 25-36, Vienna,
Austria, September 2005.
DELOS Research Exchange Award [pdf]
Manolis Koubarakis, Zoi Kaoudi and Iris Miliaraki, Semantic Grid Service Discovery
using DHTs, Extended Abstract. Proceedings of the 1st CoreGrid WP2 Workshop on
Knowledge and Data Management. September 13-14, 2005. Poznan, Poland. [pdf]
Christos Tryfonopoulos, Stratos Idreos, and Manolis Koubarakis, Publish/Subscribe
Functionality in IR Environments using Structured Overlay Networks. In Proceedings of
the 28th Annual International ACM SIGIR Conference, Salvador, Brazil, August 2005. [pdf]
E. Liarou, S. Idreos and M. Koubarakis, Publish/Subscribe with RDF Data over Large Structured
Overlay Networks. In Proceedings of the 3rd International Workshop on Database,
Information Systems and Peer-to-Peer Computing (DBISP2P 2005), in conjunction with VLDB 2005, Trondheim,
Norway, August 28-29, 2005. [pdf]
P. Marrow and M. Koubarakis, Self-organising applications using lightweigh agents. Third International Workshop on Engineering Self-Organising Applications (ESOA 2005). Held in
conjunction with the 4th International Joint Conference on Autonomous Agents and Multi-Agent Systems
(AAMAS 2005), July 2005. Utrecht, The Netherlands. [pdf]
Christos Tryfonopoulos, Stratos Idreos, and Manolis Koubarakis, Publish/Subscribe
Functionalities for Future Digital Libraries using Structured Overlay Networks. In
Proceedings of the 8th International Workshop of the DELOS Network of Excellence on Digital Libraries on
Future Digital Library Management Systems, Schloss Dagstuhl, Germany, March 2005. [pdf]
S. Skiadopoulos and M. Koubarakis, On the Consistency of Cardinal Directions Constraints, Artificial Intelligence, Vol. 163, No. 1, 2005, pp. 91-135. [pdf]
M. Koubarakis, Indefnite Constraint Databases with Temporal Information: Representational
Power and Computational Complexity. In M. Fischer, D. Gabbay and L. Villa (eds.)
Handbook of Temporal Reasoning in Artificial Intelligence. Volume 1 in the series "Foundations of
Artificial Intelligence", B. Nebel, J.Hendler and H. Kitano (eds). Elsevier Science. 2005. [pdf]
P. Raftopoulou, M. Koubarakis, K. Stergiou and P. Triantafillou, Fair Resource Allocation in a
Simple Multi-Agent Setting: Search Algorithms and Experimental Evaluation, International Journal of Artificial Intelligence Tools, Vol. 14, No. 6, 2005, pp. 887-899. [
pdf]
S. Skiadopoulos, C. Giannoukos, N. Sarkas,
P. Vassiliadis, T. Sellis and M. Koubarakis, Computing and Managing Cardinal Direction
Relations, IEEE Transactions on Knowledge and Data Engineering, Vol. 14, No. 6, 2005,
pp. 1610-1623. [pdf]
2004
C. Tryfonopoulos and M. Koubarakis and Y. Drougas, Filtering Algorithms for Information
Retrieval Models with Named Attributes and Proximity Operators, Proceedings of the 27th
Annual ACM SIGIR Conference. July 25-July 29, 2004, Sheffield, United Kingdom. [pdf]
M. Koubarakis, Word Proximity Constraints: Information Retrieval meets Temporal Reasoning,
Proceedings of the 11th International Symposium on Temporal Representation and Reasoning,
Tatihou, Νormandie, France, 1-3 July, 2004. [pdf]
C. Tryfonopoulos and M. Koubarakis, Implementing Publish/Subscribe Systems with Languages from
Information Retrieval on Top of Structured Overlay Networks. In Proceedings of the
International Workshop on Peer-to-Peer and IR (P2P&IR 2004), Sheffield, UK, July 29, 2004. [pdf]
C. Tryfonopoulos and M. Koubarakis, Publish/Subscribe Systems with Distributed Hash Tables and
Languages from Information Retrieval. In Proceedings of the 6th Workshop on Distributed
Data and Structures (WDAS 2004), Lausanne, Switzerland, July 5-7, 2004. [pdf]
M. Koubarakis and C. Tryfonopoulos, Distributed Resource Sharing using Self-Organized
Peer-to-Peer Networks and Languages from Information Retrieval, Invitational Workshop
on Self-* Properties in Complex Information Systems. Bertinoro, Italy, 31 May and 2 June, 2004. [pdf]
S. Idreos, M. Koubarakis and C. Tryfonopoulos, P2P-DIET: An Extensible P2P Service that
Unifies Ad-hoc and
Continuous Querying in Super-peer Networks, Proceedings of the ACM SIGMOD/PODS 2004
Conference. Maison de la Chimie, Paris, France, June 13-18, 2004, Demo paper. [pdf]
S. Idreos and M. Koubarakis, P2P-DIET: Ad-hoc and Continuous Queries in Peer-to-Peer Networks
using Mobile Agents, 3rd Hellenic Conference in Artificial Intelligence, Samos, Greece,
May 5-8, 2004. In LNAI, Vol. 3025, pages 23-32. [pdf]
P.-A. Chirita, S. Idreos, M. Koubarakis, and W. Nejdl, Publish/Subscribe for RDF-based P2P
Networks, Proceedings of the 1st European Semantic Web Symposium (ESWS 2004),
Heraklion, Crete, Greece, May 10-12, 2004. In LNCS, Vol. 3053, pages 182-197. [pdf]
Stratos Idreos, Manolis Koubarakis and Christos Tryfonopoulos. P2P-DIET: One-Time and
Continuous Queries in Super-peer Networks. Proceedings of the IX International
Conference on Extending Database Technology (EDBT04), Heraklion, Crete, Greece, March 14-18, 2004. In
LNCS, Vol. 2992, pages 851-853, Demo paper. [pdf]
S. Skiadopoulos, C. Giannoukos, P. Vassiliadis, T. Sellis and M. Koubarakis. Computing and
Handling Cardinal Direction Information. Proceedings of IX International Conference on
Extending Database Technology (EDBT04), Heraklion, Crete, Greece, March 14-18, 2004. [pdf]
S. Idreos, C. Tryfonopoulos, M. Koubarakis and Y. Drougas, Query Processing in Super-Peer
Networks with Languages Based on
Information Retrieval: the P2P-DIET Approach, International Workshop on Peer-to-Peer
Computing and Data Bases (P2P&DB 2004), Heraklion, Crete, Greece, March 14, 2004. In LNCS 3268 (Current
Trends in Database Technology - EDBT 2004 Workshops - Revised Selected Papers), Springer. [pdf]
S. Skiadopoulos and M. Koubarakis, Composing Cardinal Direction Relations, Artificial Intelligence, Vol. 152, No. 2, February 2004, pages 143-171. [pdf]
E. Bertino, S. Christodoulakis, D. Plexousakis, V. Christophides,
M. Koubarakis, K. Böhm, and E. Ferrari (Eds.), Advances in Database Technology, Proceedings of the 9th International Conference on Extending Database Technology (EDBT 2004),
Heraklion, Crete, Greece, March 14-18, 2004, . Lecture Notes in Computer Science, Vol. 2992, Springer.
K. Aberer, M. Koubarakis and V. Kalogeraki, Databases, Information Systems and Peer-to-Peer
Computing, (Proceedings of International Workshop, DBISP2P 2003), Lecture Notes in
Computer Science, Vol. 2944, Springer.
2003
M. Koubarakis, C. Tryfonopoulos, S. Idreos and Y. Drougas, Selective Information Dissemination
in P2P Networks: Problems and Solutions, ACM SIGMOD Record, Special issue on
Peer-to-Peer Data Management, Karl Aberer (editor), Volume 32, Number 3, September 2003. [pdf]
M. Koubarakis, Multi-Agent Systems and P2P Computing: Methods, Systems and Challenges (Invited
talk), Proceedings of the 7th International Workshop on Cooperative Information Agents
(CIA 2003), Helsinki, Finland, August 27-29, 2003. In LNAI, Vol. 2782, pages 46-61, Springer. [pdf]
M. Koubarakis, T. Sellis, A. Frank, S. Grumbach, R. H. Güting, C. Jensen, N. Lorentzos, Y.
Manolopoulos, E. Nardelli, B. Pernici, Hans-Jörg Schek, M. Scholl, B. Theodoulidis and N.
Tryfona (eds.) Spatiotemporal Databases: The Chorochronos Approach, Lecture Notes in Computer Science, Vol. 2520, June 2003, Springer.
G. Moro and M. Koubarakis, Agents and Peer-to-Peer Computing(Proceedings of First
International Workshop, AP2PC 2002), Lecture Notes in Computer Science, Springer, Vol. 2530, June 2003.
S. Grumbach, M. Koubarakis, M. Scholl, P. Rigaux and S. Skiadopoulos, Spatiotemporal models
and languages: an approach based on constraints. In M. Koubarakis, T. Sellis et. al.Spatiotemporal Databases: The Chorochronos Approach, Lecture Notes in Computer Science, Vol.
2520, June 2003, Springer. [pdf]
M. Koubarakis and T. Sellis, Introduction, In M. Koubarakis, T. Sellis et. al.
(eds.)Spatiotemporal Databases: The Chorochronos Approach, Lecture Notes in Computer
Science, Vol. 2520, pages 1-5, June 2003, Springer. [pdf]
M. Koubarakis, Y. Theodoridis and T. Sellis, Spatio-temporal Databases in the Years Ahead,
In M. Koubarakis, T. Sellis et. al. (eds.)Spatiotemporal Databases: The Chorochronos
Approach, Lecture Notes in Computer Science, Vol. 2520, pages 289-290, June 2003, Springer. [pdf]
P. Triantafillou, C. Xiruhaki, M. Koubarakis and N. Ntarmos, Towards High-Performance
Peer-to-Peer Content and Resource Sharing Systems. In First Biennial Conference on
Innovative Data Systems Research (CIDR 2003), January 5-9, Pacific Grove, California, U.S.A. [pdf]
2002
M. Koubarakis and C. Tryfonopoulos, Peer-to-peer agent systems for textual information
dissemination: algorithms and complexity. In UK Workshop on Multiagent Systems
(UKMAS-2002), Liverpool, UK, 18 & 19 December, 2002. [pdf]
M. Koubarakis, Querying Temporal Constraint Networks: A Unifying Approach. Applied Intelligence,Vol. 17, No. 3, pages 297-311, November-December 2002. [pdf]
M. Koubarakis, C. Tryfonopoulos, P. Raftopoulou, T. Koutris, Data Models and Languages for
Agent-Based Textual Information Dissemination. 6th International Workshop on
Cooperative Information Systems (CIA 02), 18-20 September 2002, Universidad Rey Juan Carlos, Madrid,
Spain. [pdf] [long version(zipped)]
M. Koubarakis, T. Koutris, C. Tryfonopoulos, P. Raftopoulou, Information Alert in Distributed
Digital Libraries: The Models, Languages and Architecture of DIAS. 6th European
Conference on Research and Advanced Technology for Digital Libraries (ECDL 02), 16-18 September 2002,
Pontifical Gregorian University, Rome, Italy. [pdf]
M. Koubarakis and D. Plexousakis, A Formal Framework for Business Process Modeling and Design.
Information Systems, Vol. 27, No. 5, pages 299-319, July 2002. [gzipped postscript]
Peter Triantafillou, Chryssani Xiruhaki and Manolis Koubarakis, Efficient Massive Sharing of
Content among Peers. IEEE Workshop on Resource Sharing in Massively Distributed Systems
(RESH'02), July 2, 2002, Vienna, Austria. [pdf]
M. Koubarakis, Textual Information Dissemination in Distributed Event-Based Systems. Proceedings of the International Workshop on Distributed Event-Based systems (DEBS'02), July 2-3,
2002, Vienna, Austria. [gzipped
postscript]
A. Gallardo-Antolin, A. Navia-Vasquez, H. Y. Molina-Bulla, A.B. Rodriguez-Gonzalez, F. J.
Valverde-Albacete, J. Cid-Sueiero, A.R. Figuieras-Vidal, T. Koutris, C. Xiruhaki and M. Koubarakis,
I-Gaia: an Information Processing Layer for the DIET Platform. Proceedings of the
1st International Conference on Autonomous Agents and Multi-Agent Systems (AAMAS2002), Bologna, Italy,
July 2002. [pdf]
M. Koubarakis, T. Koutris, P. Raftopoulou and C. Tryfonopoulos, Efficient Agent-Based
Dissemination of Textual Information, 2nd Hellenic Conference on Artificial
Intelligence (SETN 02), 11 - 12 April 2002, Thessaloniki, Greece. Poster. [pdf]
S. Skiadopoulos and M. Koubarakis. Composition Algorithms for Cardinal Direction Relations.
2nd Hellenic Conference on Artificial Intelligence (SETN 02), 11 - 12 April 2002,
Thessaloniki, Greece. Poster.
T. Finin, M. Koubarakis and Y. Labrou (eds.) Special Issue on Intelligent Information Agents
in the Internet and WWW Age. International Journal on Artificial Intelligence Tools,
Vol. 11, No. 2, March 2002.
S. Skiadopoulos, M. Koubarakis, Consistency Checking for Qualitative Spatial Reasoning with
Cardinal Directions. CP 2002, pages 341-355. [gzipped ps]
2001
M. Koubarakis, Boolean Queries with Proximity Operators for Information Dissemination. Proceedings of the workshop on Foundations of Models and Languages for Information Integration
(FMII-2001), Viterbo, Italy , 16-18 September, 2001. [gzipped postscript]
M. Koubarakis, Tractable Disjunctions of Linear Constraints: Basic Results and Applications to
Temporal Reasoning, Theoretical Computer Science, Vol. 266, pages 311-339, September
2001. [gzipped postscript]
S. Skiadopoulos and M. Koubarakis, Composing Cardinal Direction Relations, Proceedings of the 7th International Symposium on Spatial and Temporal Databases (SSTD-2001), Los
Angeles, California, July 12-15, 2001. [gzipped postscript]
P. Marrow, M. Koubarakis, R.H. van Lengen, F. Valverde-Albacete, E. Bonsma, J. Cid-Suerio, A.R.
Figueiras-Vidal, A. Gallardo-Antolin, C. Hoile, T. Koutris, H. Molina-Bulla, A. Navia-Vazquez, P.
Raftopoulou, N. Skarmeas, C. Tryfonopoulos, F. Wang, C. Xiruhaki, Agents in Decentralised
Information Ecosystems: The DIET Approach. Symposium on Information Agents for E-Commerce, AISB'01
Convention, 21st - 24th March 2001 University of York, United Kingdom. [pdf]
2000
D. Cohen, P. Jeavons, P. Jonsson and M. Koubarakis, Building Tractable Disjunctive
Constraints, Journal of ACM, Vol. 47, No. 5, pages 826-853, September 2000. [gzipped postscript]
M. Koubarakis and D. Plexousakis, A Formal Model for Business Process Modeling and Design,
Proceedings of CAiSE*00, Stockholm, Sweden, June 5-9, 2000. [gzipped postscript]
M. Koubarakis and S. Skiadopoulos, Querying temporal and spatial constraint networks in PTIME.
Artificial Intelligence, Vol. 123, No. 1-2, pages 223-263, 2000. [gzipped
postscript]
Koubarakis, M. and Plexousakis, D., Business Process Modeling and Design: A Formal Model and
Methodology, BT
Technology Journal, special issue on the emerging enterprise, Vol. 17, No. 4, pp. 23-35, October
1999. [pdf]
Koubarakis, M. and Skiadopoulos, S., Querying Indefinite Temporal and Spatial Information: A
New Frontier, Proceedings of the IJCAI-99 Workshop on Hot Topics in Temporal and
Spatial Reasoning, Stockholm, Sweden, August 2, 1999. [gzipped postscript]
Koubarakis, M. and Plexousakis, D., Business Process Modeling and Design: AI Models and
Methodology, Proceedings of the IJCAI-99 Workshop on Intelligent Workflow and Process
Management: The New Frontier for AI in Business, Stockholm, Sweden, August 1-2, 1999. [gzipped postscript]
M. Koubarakis and S. Skiadopoulos, Querying Temporal Constraint Networks in PTIME, Proceedings of AAAI-99. Orlando, Florida, July 18-22, 1999. [gzipped postscript]
Andrew U. Frank, Stephane Grumbach, Ralf Hartmut Guting, Christian S. Jensen, Manolis Koubarakis,
Nikos A. Lorentzos, Yannis Manolopoulos, Enrico Nardelli, Barbara Pernici, Hans-Jorg Schek, Michel
Scholl, Timos K. Sellis, Babis Theodoulidis and Peter Widmayer, Chorochronos: A Research
Network for Spatiotemporal Database Systems, ACM SIGMOD Record, Vol. 28, No. 3, pages
12-21, 1999. [pdf]
M. Koubarakis and S. Skiadopoulos, Tractable Query Answering in Indefinite Constraint
Databases: Basic Results and Applications to Querying Spatio-Temporal Information. In
Spatio-Temporal Database Management (Proceedings of the International Workshop STDBM'99), Lecture Notes
in Computer Science, Vol. 1678, Bohlen, M.H. and Jensen, C. and Scholl, M. (eds.), pages 204-223,
Springer, 1999. [pdf]
1998
K. Stergiou and M. Koubarakis, Backtracking Algorithms for Disjunctions of Temporal
Constraints, Proceedings of AAAI-98, pages 248-253. Madison, Wisconsin, July 26-30,
1998. [gzipped postscript]
1997
M. Koubarakis, From Local to Global Consistency in Temporal Constraint Networks, Theoretical Computer Science, Vol. 173, pages 89-112, February 1997. Invited submission to the
special issue for the 1st International Conference on Principles and Practice of Constraint Programming
(CP95), Editors: U. Montanari and F. Rossi. [gzipped postscript]
M. Koubarakis, The Complexity of Query Evaluation in Indefinite Temporal Constraint Databases,
Theoretical Computer Science, Vol. 171, pages 25-60, January 1997. Special Issue on
Uncertainty in Databases and Deductive Systems, Editor: L.V.S. Lakshmanan. [gzipped postscript]
D. Cohen, P. Jeavons and M. Koubarakis, Tractable Disjunctive Constraints, Proceedings of the 3rd International Conference on Principles and Practice of Constraint Programming
(CP97). Lecture Notes in Computer Science, Vol. 1330, pages 478-490. [gzipped postscript]
1996
M. Koubarakis, Tractable Disjunctions of Linear Constraints, Proceedings of the
2nd International Conference on Principles and Practice of Constraint Programming (CP96), Lecture Notes
in Computer Science, Vol. 1118, pages 297-307. [gzipped postscript]
1995
M. Koubarakis, Databases and Temporal Constraints: Semantics and Complexity, In
Clifford, J. and Tuzhilin, A. (eds.), Recent Advances in Temporal Databases (Proceedings of the
International Workshop on Temporal Databases, Zurich, Switzerland, September 1995), Workshops in
Computing, Springer, pages 93-109. [gzipped postscript]
M. Koubarakis, From Local to Global Consistency in Temporal Constraint Networks, Proceedings of the 1st International Conference on Principles and Practice of Constraint Programming
(CP95), Lecture Notes in Computer Science, Vol. 976, pages 53-69, September 1995. [gzipped postscript]
1994
D. Papadias, A. Frank and M. Koubarakis, Constraint-Based Reasoning in Geographic Databases:
the Case of Symbolic Arrays, Proceedings of the 2nd ICLP Workshop on Deductive
Databases and Logic Programming, Santa Margherita Ligure, Italy, June 1994. Published as GMD-Studien Nr.
231, U. Geske, D. Seipel (eds.)
M. Koubarakis, Complexity Results for First-Order Theories of Temporal Constraints, Proceedings of the 4th International Conference on Principles of Knowledge Representation and
Reasoning (KR'94), pages 379-390, May 1994. [gzipped postscript]
M. Koubarakis, Database Models for Infinite and Indefinite Temporal Information, Information Systems, Vol. 19, No. 2, March 1994, pages 141-173. [gzipped postscript]
M. Koubarakis, Foundations of Temporal Constraint Databases, Ph.D. thesis,
Computer Science Division, Dept. of Electrical and Computer Engineering, National Technical University
of Athens, February 1994. [gzipped postscript]
M. Koubarakis, Foundations of Indefinite Constraint Databases, In A. Borning
(ed.), Proceedings of the 2nd International Workshop on the Principles and Practice of Constraint
Programming (PPCP'94), Lecture Notes in Computer Science vol. 874, pages 266-280, Springer Verlag, 1994.
[gzipped postscript]
1993
M. Koubarakis, Representation and Querying in Temporal Databases: the Power of Temporal
Constraints, Proceedings of the 9th International Conference on Data Engineering, pages
327-334, April 1993. [gzipped
postscript]
J. Mylopoulos, A. Borgida, M. Jarke and M. Koubarakis, Representing Knowledge About
Information Systems in Telos, In M. Jarke (ed.), Database Application Engineering with
DAIDA, Springer Verlag, 1993, pages 31-64.
1992
M. Koubarakis, Dense Time and Temporal Constraints with "not equals", Proceedings
of the 3rd International Conference on Principles of Knowledge Representation and Reasoning (KR'92),
pages 24-35, October 1992. [gzipped
postscript]
1991
B.M. Kramer, V.K. Chaudhri, M. Koubarakis, T. Topaloglou, H. Wang and J. Mylopoulos,
Implementing Telos, SIGART Bulletin, Special Issue on Implemented Knowledge
Representation and Reasoning Systems, Vol. 2, No. 3, June 1991, pages 77-83. [pdf]
1990
J. Mylopoulos, A. Borgida, M. Jarke and M. Koubarakis, Telos: Representing Knowledge about
Information Systems, ACM Transactions on Information Systems, Vol. 8, No. 4, October
1990, pages 325-362. [pdf]
1988
M. Koubarakis, An Implementation of CML (Telos), M.Sc. thesis, Dept. of Computer
Science, University of Toronto, January 1988. Not available in electronic form. Instead you can read the basic
paper on Telos.