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About me

I am Serafeim, a research associate in the Information Management Systems Institute (IMSI) of the ATHENA Research Center since 2014 and a software engineer at OpenAIRE AMKE since April 2022.

I received my degree from the Department of Informatics and Telecommunications, University of Athens, Greece, in 2012, my master's degree in Computer Systems from the same department in 2015, and my PhD in Computer Science from the University of the Peloponnese, Greece, in 2022.

My PhD dissertation, entitled "Data mining for scholarly information networks" was supervised by Prof. Christos Tryfonopoulos. During that period (2017-2022), I was also a member of the Software and Database Systems laboratory (SoDa.Lab).

I have extensive experience in EU and national research projects, while my research interests lie in the areas of data mining, scientific databases, scientometrics and big data management.

My projects

OpenAIRE Research Graph

OpenAIRE Research Graph

An open resource that aggregates and indexes a collection of research products and related entities.

Jan 2022 - present Apache Solr; Apache Spark; Java; XSLT; XQuery
BIP! Finder

BIP! Finder

An academic search engine that facilitates literature search by exploiting impact-based ranking.

Jul 2018 - present PHP; MySQL; Apache Solr
SmartDataLake

SmartDataLake

Designing, and developing novel approaches, techniques and tools for extreme-scale Data Lakes.

Aug 2019 - Dec 2021 Apache Spark; Python; Java; React.js
SciNeM

SciNeM

A scalable data science tool for heterogeneous network mining.

Aug 2019 - Dec 2021 Apache Spark; Java; React.js
The VeTo toolkit

The VeTo toolkit

An open source recommendation tool for expanding sets of experts.

Aug 2019 - Dec 2021 Python; Java; React.js
SlideWiki

SlideWiki

An open, Web-based OpenCourseWare authoring system.

Oct 2016 - Jun 2018 NodeJS; React.js; Apache Solr

My publications

Atrapos: Evaluating Metapath Query Workloads in Real Time

The Web Conf (WWW) · 2023
S. Chatzopoulos, T. Vergoulis, D. Skoutas, T. Dalamagas, C. Tryfonopoulos, P. Karras

SurvAnnT: Facilitating Community-led Scientific Surveys and Annotations

International Conference on Theory and Practice of Digital Libraries (TPDL) · 2022
A. Tzerefos, I. Kanellos, S. Chatzopoulos, T. Dalamagas, T. Vergoulis

BIP! Scholar: A Service to Facilitate Fair Researcher Assessment

ACM/IEEE Joint Conference on Digital Libraries (JCDL) · 2022
T. Vergoulis, S. Chatzopoulos, K. Vichos, I. Kanellos, A. Mannocci, N. Manola, P. Manghi

A preliminary assessment of the article deduplication algorithm used for the OpenAIRE Research Graph

Italian Research Conference on Digital Libraries (IRCDL) · 2022
K. Vichos, M. De Bonis, I. Kanellos, S. Chatzopoulos, C. Atzori, N. Manola, P. Manghi, T. Vergoulis

VeTo+: Improved Expert Set Expansion in Academia

International Journal on Digital Libraries (IJDL) · 2022
S. Chatzopoulos, T. Vergoulis, T. Dalamagas, C. Tryfonopoulos

BIP4COVID19: Releasing impact measures for articles relevant to COVID-19

Quantitative Science Studies (QSS) · 2021
T. Vergoulis, I. Kanellos, S. Chatzopoulos, D. Pla Karidi, T. Dalamagas

Further Improvements on Estimating the Popularity of Recently Published Papers

Quantitative Science Studies (QSS) · 2021
S. Chatzopoulos, T. Vergoulis, I. Kanellos, T. Dalamagas, C. Tryfonopoulos:

VeTo-web: A Recommendation Tool for the Expansion of Sets of Scholars

ACM/IEEE Joint Conference on Digital Libraries (JCDL) · 2021
S. Chatzopoulos, T. Vergoulis, T. Dalamagas, C. Tryfonopoulos

BIP! DB: A Dataset of Impact Measures for Scientific Publications

International Workshop on Scientific Knowledge: Representation, Discovery, and Assessment (Sci-K) @ The Web Conf · 2021
T. Vergoulis, I. Kanellos, C. Atzori, A. Mannocci, S. Chatzopoulos, S. La Bruzzo, N. Manola, P. Manghi

Visualising Scientific Topic Evolution

International Workshop on Scientific Knowledge: Representation, Discovery, and Assessment (Sci-K) @ The Web Conf · 2021
P. Deligiannis, T. Vergoulis, S. Chatzopoulos, C. Tryfonopoulos

SciNeM: A Scalable Data Science Tool for Heterogeneous Network Mining

Extending Database Technology (EDBT) · 2021
S. Chatzopoulos, T. Vergoulis, P. Deligiannis, D. Skoutas, T. Dalamagas, C. Tryfonopoulos

SPHINX: A System for Metapath-based Entity Exploration in Heterogeneous Information Networks

Very Large Databases (VLDB) · 2020
S. Chatzopoulos, K. Patroumpas, A. Zeakis, T. Vergoulis, D. Skoutas

ArtSim: Improved estimation of current impact for recent articles

International Workshop on Assessing Impact and Merit in Science (AimInScience) @ TPDL · 2020
S. Chatzopoulos, T. Vergoulis, I. Kanellos, T. Dalamagas, C. Tryfonopoulos

VeTo: Expert Set Expansion in Academia

International Workshop on Assessing Impact and Merit in Science (AimInScience) @ TPDL · 2020
T. Vergoulis, S. Chatzopoulos, T. Dalamagas, C. Tryfonopoulos

BIP! Finder: Facilitating scientific literature search by exploiting impact-based ranking

Conference on Information and Knowledge Management (CIKM) · 2019
T. Vergoulis, S. Chatzopoulos, I. Kanellos, P. Deligiannis, C. Tryfonopoulos, T. Dalamagas

A study on the readability of scientific publications

International Conference on Theory and Practice of Digital Libraries (TPDL) · 2019
T. Vergoulis, I. Kanellos, A. Tzerefos, S. Chatzopoulos, T. Dalamagas, S. Skiadopoulos

SciTo trends: visualising scientific topic trends

International Conference on Theory and Practice of Digital Libraries (TPDL) · 2019
S. Chatzopoulos, P. Deligiannis, T. Vergoulis, I. Kanellos, C. Tryfonopoulos, T. Dalamagas

DIANA-TarBase v8: a decade-long collection of experimentally supported miRNA-gene interactions

Nucleic Acids Research · 2018
D. Karagkouni, M. Paraskevopoulou, S. Chatzopoulos, I. S. Vlachos, S. Tastsoglou, I. Kanellos, D. Papadimitriou, I. Kavakiotis, S. Maniou, G. Skoufos, T. Vergoulis, T. Dalamagas, A. Hatzigeorgiou

DIANA-mirExTra v2.0: Uncovering microRNAs and Transcription Factors with crucial roles in NGS expression data.

Nucleic Acids Research · 2016
I. S. Vlachos, T. Vergoulis, M. Paraskevopoulou, F. Lykokanellos, G. Georgakilas, P. Georgiou, S. Chatzopoulos, D. Karagkouni, F. Christodoulou, T. Dalamagas, A. Hatzigeorgiou

A Software-Based Self-Test Methodology for On-Line Testing of Data TLBs

IEEE European Test Symposium (ETS) · 2012
G. Theodorou, S. Chatzopoulos, N. Kranitis, A. Paschalis, D. Gizopoulos

On-Line Software-Based Self-Test for Data TLBs

Workshop on Manufacturable and Dependable Multicore Architectures at Nanoscale (MEDIAN) · 2012
G. Theodorou, S. Chatzopoulos, N. Kranitis, A. Paschalis, D. Gizopoulos