Organizer/Editor/Chair. IEEE Computer Graphics & Applications 2021 [Guest Editor], BigVis 2024-2018 [Organizer/General Chair], Big Data Research 2025, 2020 & 2018, Elsevier [Guest Editor], Frontiers in Big Data [Associate Editor], MDM 2021 [Publicity Chair], EDBT 2021 [Session Chair], Journal of Web Semantics, Elsevier [Guest Editorial Board], Open Journal of databases [Associate Editor], DASFAA 2014 [Session Chair]

Program Committee Member [partial list]. WWW [2022-2025], SIMGOD [2023-2025], VLDB [2025], EDBT/ICDT [2021-2025], DASFAA [2021-2026] [Senior PC], CIKM [2019-2023]

Reviewer [partial list]. VLDB Journal, IEEE TKDE, ACM TKDD, IEEE TVCG, ACM TWEB, Bioinformatics, Information Systems, Semantic Web Journal, World Wide Web Journal, etc.

Maroulis S., Bikakis N., Stamatopoulos V., Papastefanatos G.: Adaptive Indexing for Approximate Query Processing in Exploratory Data Analysis, 2025 [under review]

Bikakis N., Chrysanthis P., Li G., Papastefanatos G., Lingyun Y.: Visual Analytics Challenges and Trends in the Age of AI: The BigVis Community Perspective, SIGMOD Record 2025   new

Bikakis N., Papastefanatos G., Chrysanthis P.K., Papemmanuil O., Auber D., Frey S., Fujishiro I., Hauptmann H., Liu S., Ma K-L., Schreck T., Sedlmair M., Sharaf M.: Visualizing, Exploring & Analyzing Big Data: A 6-Year Story, SIGMOD Record 2024   new

Stratigi M., Bikakis N., Stefanidis K.: Counterfactual Explanations for Group Recommendations, 27th intl. workshop on design, optimization, languages & analytical processing of big data (DOLAP '25)   new

Maroulis S., Bikakis N., Stamatopoulos V., Papastefanatos G.: Partial Adaptive Indexing for Approximate Query Answering, intl. workshop on big data visual exploration & analytics (BigVis '24)   new

Maroulis S., Bikakis N., Papastefanatos G., Vassiliadis P., Vassiliou Y.: Resource-Aware Adaptive Indexing for In-situ Visual Exploration and Analytics, VLDB Journal 2023 [poster] [code] [home]

Bikakis N., Giannopoulos G., Sidiropoulos N., Flouda C., Doupas A., Giouli V., Karioris P., Botini P., Vacalopoulou A., Stainhaouer G.: Exposing Geospatial Cultural Heritage Content in Map-based Applications, intl. workshop on big data visual exploration & analytics (BigVis '23)

Giouli V., Vacalopoulou A., Sidiropoulos N., Flouda C., Doupas A., Giannopoulos G., Bikakis N.,Kaffes V., Stainhaouer G.: Placing multi-modal, and multi-lingual Data in the Humanities Domain on the Map: the Mythotopia Geo-tagged Corpus, 13th intl. conf. on language resources & evaluation (LREC 22)

Papastefanatos G., Alexiou G., Bikakis N., Maroulis S., Stamatopoulos V.: VisualFacts: A Platform for In-Situ Visual Exploration and Real-time Entity Resolution, intl. workshop on big data visual exploration & analytics (BigVis '22)

Maroulis S., Bikakis N., Papastefanatos G., Vassiliadis P., Vassiliou Y.: RawVis: A System for Efficient In-situ Visual Analytics, intl. conf. on Management of Data (ACM SIGMOD/PODS '21) [poster] [code] [video] [home]

Bikakis N., Maroulis S., Papastefanatos G., Vassiliadis P.: In-Situ Visual Exploration over Big Raw Data, information systems, Elsevier, 2021 [poster] [code] [home]

Bikakis N.: Big Data Visualization Tools, Encyclopedia of big data technologies, 2nd ed, Springer 2022 [springer]

Maroulis S., Bikakis N., Papastefanatos G., Vassiliadis P., Vasiliou Y.: Adaptive Indexing for In-situ Visual Exploration and Analytics, 23rd intl. workshop on design, optimization, languages and analytical processing of big data (DOLAP '21)

Andrienko G., Andrienko N., Drucker S., Fekete J.-D., Fisher D., Idreos S., Kraska T., Li G., Ma K.-L., Mackinlay J.D., Oulasvirta A., Schreck A., Schmann H., Stonebraker M., Auber D., Bikakis N., Chrysanthis P.K., Papastefanatos G., Sharaf M.: Big Data Visualization and Analytics: Future Research Challenges and Emerging Applications 3rd intl. workshop on big data visual exploration & analytics (BigVis '20)     > SIGMOD Blog Posts [Part 1] [Part 2]

Po L., Bikakis N., Desimoni F., Papastefanatos G.: Linked Data Visualization: Techniques, Tools and Big Data, Springer / Morgan & Claypool 2020     [home] [sample] [BibTeX]   [Among the top-5 most downloaded book (in 2020) in the Data, Semantics, and Knowledge series, Morgan & Claypool Publishers, 2021]

Bikakis N., Kalogeraki V., Gunopulos D.: Attendance Maximization for Successful Social Event Planning, 22nd intl. conf. on extending database technology (EDBT '19)

Bikakis N.: Big Data Visualization Tools, encyclopedia of big data technologies, Springer 2019

Bikakis N., Kalogeraki V., Gunopulos D.: Social Event Scheduling, 34th IEEE intl. conf. on data engineering (ICDE '18)   [preview]

Bikakis N., Maroulis S., Papastefanatos G., Vassiliadis P.: RawVis: Visual Exploration over Raw Data, 22nd european conf. on advances in databases & information systems (ADBIS 2018)   [Best Paper Award]  

Bikakis N., Liagouris J., Krommyda M., Papastefanatos G., Sellis T.: graphVizdb: A Scalable Platform for Interactive Large Graph Visualization, 32nd IEEE intl. conf. on data engineering (ICDE '16)   [preview]

Bikakis N., Sellis T.: Exploration and Visualization in the Web of Big Linked Data: A Survey of the State of the Art, 6th intl. workshop on linked web data management (LWDM '16)

Bikakis N., Papastefanatos G., Skourla M., Sellis T.: A Hierarchical Aggregation Framework for Efficient Multilevel Visual Exploration and Analysis, semantic web journal (SWJ), 2016

Bikakis N., Benouaret K., Sacharidis D.: Finding Desirable Objects under Group Categorical Preferences, knowledge & information systems journal (KAIS), 2015

Bikakis N., Liagouris J., Krommyda M., Papastefanatos G., Sellis T.: Towards Scalable Visual Exploration of Very Large RDF Graphs, 12th extended semantic web conference (ESWC '15)   [Best Poster/Short Paper Award]

Bouros P., Sacharidis D., Bikakis N.: Regionally Influential Users in Location-Aware Social Networks, 22nd ACM intl. conf. on advances in geographic information systems (ACM GIS SIGSPATIAL '14)   [preview]

Bikakis N., Tsinaraki C., Stavrakantonakis I., Christodoulakis S.: Supporting SPARQL Update Queries in RDF-XML Integration, 13th intl. semantic web conference (ISWC '14)   [preview]

Bikakis N., Sacharidis D., Sellis T.: A Study on External Memory Scan-based Skyline Algorithms, 25th intl. conf. on database & expert systems applications (DEXA '14)

Bikakis N., Skourla M., Papastefanatos G.: rdf:SynopsViz - A Framework for Hierarchical Linked Data Visual Exploration and Analysis, 11th extended semantic web conference (ESWC '14)

Bikakis N., Benouaret K., Sacharidis D.: Reconciling Multiple Categorical Preferences with Double Pareto-based Aggregation, 19th intl. conf. on database systems for advanced applications (DASFAA '14)   [technical report]

Bikakis N., Tsinaraki C., Stavrakantonakis I., Gioldasis N., Christodoulakis S.: The SPARQL2XQuery Interoperability Framework, world wide web journal (WWWJ), 2013   [technical report]

Bikakis N., Giannopoulos G., Liagouris J., Skoutas D., Dalamagas T., Sellis T.: RDivF: Diversifying Keyword Search on RDF Graphs, 17th intl. conf. on theory & practice of digital libraries (TPDL '13)   [preview]

Bikakis N., Tsinaraki C., Gioldasis N., Stavrakantonakis I., Christodoulakis S.: The XML and Semantic Web Worlds: Technologies, Interoperability and Integration. A survey of the State of the Art, semantic hyper/multi-media adaptation: schemes & applications, Springer 2013

Dalamagas T., Bikakis N., Papastefanatos G., Stavrakas Y., Hatzigeorgiou A.: Publishing Life Science Data as Linked Open Data: the Case Study of miRBase, 1st intl. workshop on open data (WOD '12)

Makris K., Bikakis N., Gioldasis N., Christodoulakis S.: SPARQL-RW: Transparent Query Access over Mapped RDF Data Sources, 15th intl. conf. on extending database technology (EDBT '12)   [preview]

Stavrakantonakis I., Tsinaraki C., Bikakis N., Gioldasis N., Christodoulakis S.: SPARQL2XQuery 2.0: Supporting Semantic-based Queries over XML Data, 5th intl. workshop on semantic media adaptation & personalization (SMAP '10)

Makris K., Gioldasis N., Bikakis N., Christodoulakis S.: Ontology Mapping and SPARQL Rewriting for Querying Federated RDF Data Sources, 9th intl. conf. on ontologies, databases, & applications of semantics (ODBASE '10)   [technical report]

Bikakis N., Giannopoulos G., Dalamagas T., Sellis T.: Integrating Keywords and Semantics on Document Annotation and Search, 9th intl. conf. on ontologies, databases, & applications of semantics (ODBASE '10)

Giannopoulos G., Bikakis N., Dalamagas T., Sellis T.: GoNTogle: A Tool for Semantic Annotation and Search, 7th extended semantic web conference (ESWC '10)

Bikakis N., Gioldasis N., Tsinaraki C., Christodoulakis S.: Querying XML Data with SPARQL, 20th intl. conf. on database & expert systems applications (DEXA '09)

Bikakis N., Gioldasis N., Tsinaraki C., Christodoulakis S.: Semantic Based Access over XML Data, 2nd intl. summit on knowledge society (WSKS '09)

Makris K., Bikakis N., Gioldasis N., Tsinaraki C., Christodoulakis S.: Towards a Mediator based on OWL and SPARQL, 2nd intl. summit on the knowledge society (WSKS '09)

Multimodal Foundation Models for the Maritime Domain [2025]

VisualFacts :: Democratizing Visual Analytics    [Research Project for the support of Post-doctoral Researchers]   

RawVis :: Progressive & Adaptive Processing for In-situ Visualization & Analytics over Big Raw Data    [Nat/Eu Young Researchers Research Grant]

Social Event Organization :: Successful Social Events Planning

graphVizdb :: A Platform for Interactive Big Graph Data Visualization  |: >_  try

synopsViz :: A Hierarchical Aggregation Framework for Progressive Multi-level Visualization & Analytics over Big Data

RDivF :: Keyword Search Diversification over RDF Data

SPARQL2XQuery :: Bridging the gap between the XML & the Semantic Web

SPARQL-RW :: Querying the Web of Data through Ontology Mapping & SPARQL Query Rewriting [Online Demo]

miRNA LOD :: Publishing & Exploring Evolving Biological Linked Data

GoNTogle :: Semantic-based Retrieval & Annotation