August 25, 2010. The paper Towards a new crown indicator: Some theoretical considerations by Ludo Waltman, Nees Jan van Eck, Thed van Leeuwen, Martijn Visser, and Anthony van Raan has been accepted for publication in the Journal of Informetrics.
July 16, 2010. The paper A comparison of two techniques for bibliometric mapping: Multidimensional scaling and VOS by Nees Jan van Eck, Ludo Waltman, Rommert Dekker, and Jan van den Berg has been accepted for publication in the Journal of the American Society for Information Science and Technology.
July 15, 2010. The paper A unified approach to mapping and clustering of bibliometric networks by Ludo Waltman, Nees Jan van Eck, and Ed Noyons has been accepted for publication in the Journal of Informetrics.
June 15, 2010. VOSviewer version 1.2.1 has been released and is available at www.vosviewer.com.
June 15, 2010. The paper The relation between Eigenfactor, audience factor, and influence weight by Ludo Waltman and Nees Jan van Eck has been published in volume 61, issue 7 of the Journal of the American Society for Information Science and Technology.
June 13, 2010. The paper Software survey: VOSviewer, a computer program for bibliometric mapping by Nees Jan van Eck and Ludo Waltman has been published in volume 84, issue 2 of Scientometrics.
June 9, 2010. The paper Rivals for the crown: Reply to Opthof and Leydesdorff by Anthony van Raan, Thed van Leeuwen, Martijn Visser, Nees Jan van Eck, and Ludo Waltman has been published in volume 4, issue 3 of the Journal of Informetrics.
June 5, 2010. The paper A unified approach to mapping and clustering of bibliometric networks by Ludo Waltman, Nees Jan van Eck, and Ed Noyons has been submitted.
May 24, 2010. The paper Economic modeling using evolutionary algorithms: The effect of a binary encoding of strategies by Ludo Waltman, Nees Jan van Eck, Rommert Dekker, and Uzay Kaymak has been accepted for publication in the Journal of Evolutionary Economics.
May 18, 2010. VOSviewer version 1.2.0 has been released and is available at www.vosviewer.com.
My research focuses primarily on the bibliometric mapping of scientific fields (various maps that I have constructed can be found here). I am working on a PhD thesis on this topic (supervised by prof.dr.ir. Rommert Dekker and dr.ir. Jan van den Berg). Another research interest that I have, which is somewhat separate from the rest of my work, is the construction and analysis of bibliometric performance indicators. In most of my research I am working closely together with Ludo Waltman.
