Welcome

This is the personal website of Klaas Andries de Graaf.



On this website I highlight some of my research projects and writings. And how to contact me.
You can also check my LinkedIn profile for more information on my work experience.

Maybe you have been redirected to this website from archimind.nl.
This is correct, as I worked on the ArchiMind semantic wiki

Research and projects:

I currently work in the data science expertise group at TNO.

From 2020 to 2021 I worked as a software engineer at Kidskonnect.
In 2019 I worked on food data integration, prediction models, and expert systems at the Food Informatics group at Wageningen Food & Biobased Research at Wageningen University & Research.
From 2016 to 2018 I was a Postdoctoral Researcher in the Knowledge Representation & Reasoning research group at Vrije Universiteit where I worked on SlideWiki in the SlideWiki H2020 EU project.
I also collaborated in the RISIS FP7 EU project on linked data and data science in the Linked Data Reactor.

During my PhD in the IMSE research group I investigated the use of ontologies and semantic wikis to organise and retrieve knowledge in software architecture documentation.
Also see my PhD thesis, a demonstration of the ArchiMind semantic wiki, Source code of ArchiMind on Github, and a presentation on this ontology-based software architecture documentation approach during WICSA 2012

• Semantic web technologies.
• Software architecture, engineering, and documentation.
• Retrieval, modelling, management, and searching of architectural knowledge.
• Search heuristics, strategies, and cognitive biases.
• Open educational content.
• Serious/educational games.
• Computer graphics and knowledge visualisation.
• Reliability prediction.

Contact:

Publications:

Also see ORCID, DBLP Academia.edu, Researchgate, Mendeley

• SlideWiki - A platform for authoring FAIR educational content [download ] - Ali Khalili, Klaas Andries de Graaf - Posters and Demos Track at SEMANTiCS 2018, Vienna, Austria, CEUR Workshop Proceedings, 2018

• SlideWiki - Towards a collaborative and accessible platform for slide presentations [download ] - Mirette Elias, Abi James, Edna Ruckhaus, Mari Carmen Suárez-Figueroa, Klaas Andries de Graaf, Ali Khalili, Benjamin Wulff, Steffen Lohmann, Sören Auer - 13th European Conference On Technology Enhanced Learning (EC-TEL 2018), CEUR Workshop Proceedings, Leeds, United Kingdom, 2018

• Using linked open geo boundaries for adaptive delineation of functional urban areas - Ali Khalili, Peter van den Besselaar, Klaas Andries de Graaf - Proceedings of the 3rd International Workshop on Geospatial Linked Data and the 2nd Workshop on Querying the Web of Data co-located with 15th Extended Semantic Web Conference (ESWC 2018), pp. 327--341, Springer/Verlag, Heraklion, Greece, 2018

• FERASAT: A Serendipity-Fostering Faceted Browser for Linked Data - Ali Khalili, Peter van den Besselaar, Klaas Andries de Graaf - 15th Extended Semantic Web Conference, ESWC 2018, LNCS, pp. 351--366, Heraklion, Greece, 2018

• SlideWiki microservice architecture for collaborative online system development - Klaas Andries de Graaf, Ali Khalili - 10th ACM Conference on Web Science (WebSci '18), ACM, Amsterdam, May 27 - 30, 2018 - [download Poster-paper and presented Poster] [SlideWiki source code on Github]

• Fostering Serendipitous Knowledge Discovery using an Adaptive Multigraph-based Faceted Browser - Ali Khalili, Pek van Andel, Peter van den Besselaar, Klaas Andries de Graaf - K-CAP 2017 - The Ninth International Conference on Knowledge Capture ACM, 2017 - [download ]

• Querying Software Architecture Knowledge as Linked Open Data [download ] - Klaas Andries de Graaf, Peng Liang, Antony Tang, Ali Khalili - International Conference on Software Architecture (ICSA), April 2017. - [AK-finder Tool] [AK-Finder Source code on Github]. Presentation below.

• A linked open data based system for flexible delineation of geographic areas - Ali Khalili, Peter van den Besselaar, Klaas Andries de Graaf - European Regional Science Association (ERSA), 29-08-2017, 2017

• Improving social research using heterogeneous data - Peter van den Besselaar, Ali Khalili, Frank van Harmelen, Klaas Andries de Graaf, - International Conference on Computational Social Science, 10-07-2017

• Linked Data Reactor: Towards Data-aware User Interfaces - Ali Khalili, Klaas Andries de Graaf - SEMANTiCS 2017 ACM, 2017 - [download ] [LD-R system] and [LD-R source code on Github] (LD-R is built and maintained by Ali Khalili)

• SMS: a platform for linking and enriching data for science and innovation studies - P.A.A. van den Besselaar, A. Khalili, O.A.K. Idrissou, K.A. de Graaf, F. van Harmelen - Global TechMining Conference (GTM) 09-10-2017

• Visualizing Linked Data as Habitable Cities - Klaas Andries de Graaf, Ali Khalili - Third International Workshop on Visualization and Interaction for Ontologies and Linked Data (VOILA!2017) co-located with the 16th International Semantic Web Conference (ISWC 2017), October 22, Vienna, Austria, 2017 - [download ] [LD-City Source code (integrated in LD-R) on Github]

• Semantically Mapping Science (SMS) Platform [download] - Ali Khalili, Peter van den Besselaar, Al Idrissou, Klaas Andries de Graaf, Frank van Harmelen - SemSci 2017: Enabling Open Semantic Science. CEUR Workshop Proceedings, p. 1-6 6 p., 2016.

• Towards an open infrastructure for Science, Technology and Innovation data [download - Peter van den Besselaar, Ali Khalili, Klaas Andries de Graaf, Al Idrissou, Antonis Loizou, Stefan Schlobach, Frank van Harmelen - 3rd OECD Blue Sky Conference, Sept 2016.

• How Organisation of Architecture Documentation Affects Architectural Knowledge Retrieval [download ] - Klaas Andries de Graaf, Peng Liang, Antony Tang, Hans van Vliet - Science of Computer Programming, Volume 121, Pages 75-99 Elsevier, June 2016. - [View paper on ScienceDirect] [ArchiMind Tool in Experiments] [ArchiMind Source code on Github]

• Ontology-based Software Architecture Documentation - Klaas Andries de Graaf - PhD Thesis - 2015 - [download thesis ][download cover ]) Presentation below.

• Supporting Architecture Documentation: A Comparison of Two Ontologies for Knowledge Retrieval [download ] - Klaas Andries de Graaf, Peng Liang, Antony Tang, Hans van Vliet - In International Conference on Evaluation and Assessment in Software Engineering (EASE), pages 3:1--3:10, ACM, 2015 - [View paper on ACM Digital Library] [ArchiMind Tool used in Experiment with actual-needs ontology and annotated contents] [ArchiMind Tool used in Experiment with expected-needs ontology and annotated contents] [ArchiMind Source code on Github]. Presentation below.

• The Impact of Prior Knowledge on Searching in Software Documentation [download ] - Klaas Andries de Graaf, Peng Liang, Antony Tang, Hans van Vliet - In Proceedings of the 2014 ACM symposium on Document engineering (DocEng), pages 189-198, ACM, 2014 - [View paper on ACM Digital Library] Presentation below

• An Exploratory Study on Ontology Engineering for Software Architecture Documentation [download ] - Klaas Andries de Graaf, Peng Liang, Antony Tang, Willem van Hage, Hans van Vliet - Computers in Industry, Vol. 65, nr. 7, pages 1053-1064, Elsevier, 2014 - [View paper on ScienceDirect] [ArchiMind Tool] [ArchiMind Source code on Github]

• Ontology-based Software Architecture Documentation [download ] - Klaas Andries de Graaf, Antony Tang, Peng Liang, Hans van Vliet - In Proceedings of the Joint 10th Working IEEE/IFIP Conference on Software Architecture & 6th European Conference on Software Architecture (WICSA/ECSA), pages 121-130, IEEE Computer Society, 2012 - [View paper on IEEE Xplore] [ArchiMind Tool] (Without experiment content as this is protected IP/company property. Instead annotated content and an ontology from a later experiment is used) [ArchiMind Source code on Github]. Presentation below.

• Annotating Software Documentation in Semantic Wikis [download ] - Klaas Andries de Graaf - In Proceedings of the fourth workshop on Exploiting semantic annotations in information retrieval (ESAIR '11), pages 5-6., ACM, 2011 - [View paper on ACM Digital Library] [ArchiMind Source code on Github]