Hi, I am Marios.
I am a postdoctoral researcher at the Information Management Systems Institute (IMSI) of Athena Research Center.
As part of my PhD thesis ((link to technical report)), I have been working on query optimization, storage and indexing, in RDF and SPARQL. I am currently involved in Big Data Management projects with Ericsson S.A. and Intracom-Telecom S.A., as well as a number of domestic and european research projects. I spent the summer of 2018 in IBM Research Dublin, working on semantic recommenders and neural embedding models over health data.
At the moment, I am researching detection of implicit graph schemas and its applications on storage, querying and visualization.
I received my BEng in Electrical and Computer Engineering from NTUA (top 10%). I hold an MSc in Artificial Intelligence (distinction, top 5%) from the University of Edinburgh and a MBA degree from NTUA and the University of Piraeus (top 5%).
My research interests lie in the following areas:
Reviewer: TKDE, IEEE Access, Journal of Web Semantics, SNAM, IJSWIS, SEMANTiCS, Information Systems Frontiers, CIKM (External), Semantic Web Journal (External), JeDEM
My publications at
Giannopoulos, G. and Meimaris, M.Learning Domain Driven and Semantically Enriched Embeddings for POI Classification. SSTD 2019.
Meimaris, M.Visualizing Implicit RDF Schema with the Help of Embeddings. (Vision Paper) BigVis@EDBT/ICDT 2019.
Meimaris, M., Papastefanatos, G., Vassiliadis, P., and Anagnostopoulos, I. Computational Methods and Optimizations for Containment and Complementarity in Web Data Cubes. Elsevier Information Systems 75 (2018) pp. 56-74. (link to technical report)
Koniaris, M., Papastefanatos, G., Meimaris, M.. and Alexiou, G. Introducing Solon: A Semantic Platform for Managing Legal Sources. TPDL 2017 (demo paper).
Meimaris, M.., Papastefanatos, G., Mamoulis, N. and Anagnostopoulos, I. Extended Characteristic Sets: Graph Indexing for SPARQL Query Optimization. ICDE 2017 (full paper - 17% acceptance rate). (link to technical report)
Meimaris, M.. and Papastefanatos, G.Distance-based Triple Reordering for SPARQL Query Optimization. DESWeb@ICDE 2017. (link to technical report)
Meimaris, M.., Papastefanatos, G., Vassiliadis, P. and Anagnostopoulos, I. Efficient Computation of Containment and Complementarity in RDF Data Cubes. EDBT 2016 (full paper).
Meimaris, M.. and Papastefanatos, G. Double Chain-Star: an RDF indexing scheme for fast processing of SPARQL joins. EDBT 2016 (poster paper).
Alexiou, G., Meimaris, M.. and Papastefanatos, G.Enabling persistent identification of groups of duplicates in data aggregators. DESWeb@ICDE 2016.
Meimaris, M. EvoGen: a Generator for Synthetic Versioned RDF. DIACHRON 2016 (collocated with EDBT 2016), 2016
Meimaris, M.., Papastefanatos, G., Viglas, S., Stavrakas, Y. and Pateritsas, C. A Query Language for Multi-version Data Web Archives. Expert Systems Journal, 2016.
Vafopoulos M., Meimaris, M.., Anagnostopoulos I., Papantoniou A., Xidias I., Alexiou G., Vafeiadis G., Klonaras M, and Loumos V. Public spending as LOD: the case of Greece. Semantic Web Journal, 2015.
Meimaris, M., Alexiou, G., Gkirtzou, K., Papastefanatos, G. and Dalamagas, T. RDF Resource Search and Exploration with LinkZoo. DATA 2015
Meimaris, M.. and Papastefanatos, G. Containment and Complementarity Relationships in Multidimensional Linked Open Data. Semantic Statistics, SEMSTATS2014.
Petrou, I., Meimaris, M.. and Papastefanatos, G., Towards a methodology for publishing Linked Open Statistical Data, Journal of eDemocracy, December 2014.
Meimaris, M.., et al, LinkZoo: a Linked Data Platform for Collaborative Management of Heterogeneous Resources, ESWC2014, May 2014.
Meimaris, M.. et al, Towards a Framework for Managing Evolving Information Resources on the Data Web, PROFILES2014, May 2014.
Archer, P., Meimaris, M.., Papantoniou, A., Registered Organization Vocabulary, (2013). W3C Note, August 2013
Vafopoulos M., Meimaris, M., Alvarez-Rodrigues, JM., Xidias, I., Klonaras, M., Vafeiadis, G., Insights in Global Public Spending, in Proceedings of the 9th International Conference on Semantic Systems, I-SEMANTICS 2013, pp. 135-139, ACM, March 2013
Vafopoulos, M. and Meimaris, M.. Weaving the Economic Linked Open Data, in Proceedings of the 7th International Workshop on Semantic and Social Media Adaptation and Personalization, December 2012
Meimaris, M.. and Vafopoulos, M. Knowledge-based Semantification of Business Communications in ERP Environments, in proceedings of the 1st Workshop on Engineering the Semantic Enterprise, part of the 13th International Web Information Systems Engineering Conference, November 2012
Vafopoulos, M., Meimaris, M.., Papantoniou, A., Anagnostopoulos, A., Xidias, I., Alexiou, G., Avraam, I., Vafeiadis, G. and Loumos, V., Intelligent and Semantic Real-time Process of Greek LOD for Enhancing Citizen Awareness in Public Expenditures, in the 13th International Web Information Systems Engineering Conference, November 2012
Vafopoulos, M., Meimaris, M.., Papantoniou, A., Anagnostopoulos, A., Xidias, I., Alexiou, G., Avraam, I., Vafeiadis, G. and Loumos, V., Publicspending. gr: interconnecting and visualizing Greek public expenditure following Linked Open Data directives, in w3c workshop on Using Open Data, policy modelling, citizen empowerment, data journalism, June 2012