April 8, 2021. The paper Large-scale comparison of bibliographic data sources: Scopus, Web of Science, Dimensions, Crossref, and Microsoft Academic by Martijn Visser, Nees Jan van Eck, and Ludo Waltman has been published in volume 2, issue 1 of Quantitative Science Studies.
February 8, 2021. I am very honored that I received the award for Best EGSH Teacher 2020. More information about the EGSH PhD Excellence Awards can be found here.
January 7, 2021. The paper A scientometric overview of CORD-19 by Giovanni Colavizza, Rodrigo Costas, Vincent Traag, Nees Jan van Eck, Thed van Leeuwen, and Ludo Waltman has been published in volume 16, issue 1 of PLOS ONE.
November 25, 2020. VOSviewer version 1.6.16 has been released and is available for download. It also offers new functionality for querying the Microsoft Academic API using author, affiliation, and journal IDs and for creating term co-occurrence maps based on Semantic Scholar data.
July 1, 2020. The slides of the keynote presentation that I gave today at the International Conference on ICT enhanced Social Sciences and Humanities 2020 are available here.
June 25, 2020. The paper Enhancing direct citations: A comparison of relatedness measures for community detection in a large set of PubMed publications by Per Ahlgren, Yunwei Chen, Cristian Colliander, and Nees Jan van Eck has been published in volume 1, issue 2 of Quantitative Science Studies.
June 25, 2020. The paper A principled methodology for comparing relatedness measures for clustering publications by Ludo Waltman, Kevin Boyack, Giovanni Colavizza, and Nees Jan van Eck has been published in volume 1, issue 2 of Quantitative Science Studies.
May 22, 2020. The paper Large-scale comparison of bibliographic data sources: Scopus, Web of Science, Dimensions, Crossref, and Microsoft Academic by Martijn Visser, Nees Jan van Eck, and Ludo Waltman has been published in arXiv.
May 19, 2020. The paper by Ciriaco Andrea D'Angelo and Nees Jan van Eck has been published in volume 123, issue 2 of Scientometrics.
I am doing research in the field of bibliometrics and scientometrics. My research focuses primarily on the development of visualization tools and algorithms, mainly for analyzing the structure and development of science. I am the main developer of VOSviewer and CitNetExplorer, two well-known software tools for visualizing bibliometric data. The VOSviewer software is frequently used in bibliometric studies. More than 1500 publications have appeared in international scientific journals in which the software is employed. In addition to my work on bibliometric visualization, I also focus on the study of bibliometric data sources and the analysis of the full text of scientific publications. In most of my research I am working closely together with Ludo Waltman.