Nees Jan van Eck, PhD
Nees Jan van Eck is senior researcher at the Centre for Science and Technology Studies (CWTS) at Leiden University. His research focuses on the development of visualization tools and algorithms, mainly for analyzing the structure and development of science. Nees Jan has published numerous scientific articles on this topic. The VOSviewer tool developed by Nees Jan (together with Ludo Waltman) is widely used by researchers in the field of bibliometrics and scientometrics. In 2010, Nees Jan received his PhD from Erasmus University Rotterdam. Many of the techniques used in the VOSviewer tool were originally introduced in his PhD thesis. In addition to his visualization research, Nees Jan also manages the IT department of CWTS.
See also Nees Jan's personal website.
Publications
Journal publications (51)
- Olensky, M., Schmidt, M., & Van Eck, N.J. (2016). Evaluation of the Citation Matching Algorithms of CWTS and iFQ in Comparison to the Web of Science. Journal of the Association for Information Science and Technology, 67(10), 2550-2564. doi:10.1002/asi.23590.
- Perianes-Rodriguez, A., Waltman, L., & Van Eck, N.J. (2016). Constructing bibliometric networks: A comparison between full and fractional counting. Journal of Informetrics, 10(4), 1178-1195. doi:10.1016/j.joi.2016.10.006.
- Subelj, L., Van Eck, N.J., & Waltman, L. (2016). Clustering scientific publications based on citation relations: A systematic comparison of different methods. PLoS ONE, 11(4), e0154404.
- Waltman, L., Van Eck, N.J., Visser, M.S., & Wouters, P. (2016). The elephant in the room: The problem of quantifying productivity in evaluative scientometrics. Journal of Informetrics, 10(2), 671-674. doi:10.1016/j.joi.2015.12.008.
- Waltman, L., & Van Eck, N.J. (2015). Field-normalized citation impact indicators and the choice of an appropriate counting method. Journal of Informetrics, 9(4), 872-894. doi:10.1016/j.joi.2015.08.001.
- Rizzi, F., Van Eck, N.J., & Frey, M. (2014). The production of scientific knowledge on renewable energies: Worldwide trends, dynamics and challenges and implications for management. Renewable Energy, 62, 657-671. doi:10.1016/j.renene.2013.08.030.
- Rodrigues, S.P., Van Eck, N.J., Waltman, L., & Jansen, F.W. (2014). Mapping patient safety: A large-scale literature review using bibliometric visualisation techniques. BMJ Open, 4(3), e004468. doi:10.1136/bmjopen-2013-004468.
- Van Eck, N.J., & Waltman, L. (2014). CitNetExplorer: A new software tool for analyzing and visualizing citation networks. Journal of Informetrics, 8(4), 802-823. doi:10.1016/j.joi.2014.07.006.
- Van Eck, N.J., Waltman, L., Van Raan, A.F.J., Klautz, R.J.M., & Peul, W.C. (2013). Citation analysis may severely underestimate the impact of clinical research as compared to basic research. PLoS ONE, 8(4), e62395. doi:10.1371/journal.pone.0062395.
- Waltman, L., & Van Eck, N.J. (2013). A smart local moving algorithm for large-scale modularity-based community detection. The European Physical Journal B, 86(11), e471. doi:10.1140/epjb/e2013-40829-0.
- Waltman, L., & Van Eck, N.J. (2013). A systematic empirical comparison of different approaches for normalizing citation impact indicators. Journal of Informetrics, 7(4), 833-849. doi:10.1016/j.joi.2013.08.002.
- Waltman, L., & Van Eck, N.J. (2013). Source normalized indicators of citation impact: an overview of different approaches and an empirical comparison. Scientometrics, 96(3), 699-716. doi:10.1007/s11192-012-0913-4.
- Waltman, L., Van Eck, N.J., & Wouters, P. (2013). Counting publications and citations: Is more always better? Journal of Informetrics, 7(3), 635-641. doi:10.1016/j.joi.2013.04.001.
- Waltman, L., Van Eck, N.J., Dekker, R., & Kaymak, U. (2013). An evolutionary model of price competition among spatially distributed firms. Computational Economics, 42(4), 373-391. doi:10.1007/s10614-012-9358-3.
- Waltman, L., Van Eck, N.J., Van Leeuwen, T.N., & Visser, M.S. (2013). Some modifications to the SNIP journal impact indicator. Journal of Informetrics, 7(2), 272-285. doi:10.1016/j.joi.2012.11.011.
- Waltman, L., & Van Eck, N.J. (2012). A mathematical analysis of the long-run behavior of genetic algorithms for social modeling. Soft Computing, 16(6), 1071-1089. doi:10.1007/s00500-012-0804-x.
- Waltman, L., & Van Eck, N.J. (2012). A new methodology for constructing a publication-level classification system of science. Journal of the American Society for Information Science and Technology, 63(12), 2378-2392. doi:10.1002/asi.22748.
- Waltman, L., & Van Eck, N.J. (2012). The Inconsistency of the h-index. Journal of the American Society for Information Science and Technology, 63(2), 406-415. doi:10.1002/asi.21678.
- Waltman, L., Calero-Medina, C.M., Kosten, M.J.F., Noyons, E.C.M., Tijssen, R.J.W., Van Eck, N.J., Van Leeuwen, T.N., Van Raan, A.F.J., Visser, M.S., & Wouters, P. (2012). The Leiden Ranking 2011/2012: Data collection, indicators, and interpretation. Journal of the American Society for Information Science and Technology, 63(12), 2419-2432. doi:10.1002/asi.22708.
- Waltman, L., Costas, R., & Van Eck, N.J. (2012). Some Limitations of the H Index: A Commentary on Ruscio and Colleagues' Analysis of Bibliometric Indices. Measurement: Interdisciplinary Research and Perspectives, 10(3), 172-175. doi:10.1080/15366367.2012.716260.
- Waltman, L., Van Eck, N.J., & Van Raan, A.F.J. (2012). Universality of citation distributions revisited. Journal of the American Society for Information Science and Technology, 63(1), 72-77. doi:10.1002/asi.21671.
- Heersmink, R., Van der Hoven, J., Van Eck, N.J., & Van den Berg, J. (2011). Bibliometric mapping of computer and information ethics. Ethics and Information Technology, 13(3), 241-249. doi:10.1007/s10676-011-9273-7.
- Tijssen, R.J.W., Waltman, L., & Van Eck, N.J. (2011). Collaborations span 1,553 kilometres. Nature, 473(7346), 154-154. doi:10.1038/473154a.
- Van Eck, N.J., & Waltman, L. (2011). Text mining and visualization using VOSviewer. ISSI Newsletter, 7(3), 50-54.
- Waaijer, C.J.F., Van Bochove, C.A., & Van Eck, N.J. (2011). On the map: Nature and Science editorials. Scientometrics, 86(1), 99-112.
- Waltman, L., Tijssen, R.J.W., & Van Eck, N.J. (2011). Globalisation of science in kilometres. Journal of Informetrics, 5(4), 574-582. doi:10.1016/j.joi.2011.05.003.
- Waltman, L., Van Eck, N.J., & Dekker, R. (2011). Economic modeling using evolutionary algorithms: the effect of a binary encoding of strategies. Journal of Evolutionary Economics, 21(5), 737-756. doi:10.1007/s00191-010-0177-1.
- Waltman, L., Van Eck, N.J., & Yan, E. (2011). A recursive field-normalized bibliometric performance indicator: an application to the field of library and information science. Scientometrics, 89(1), 301-314. doi:10.1007/s11192-011-0449-z.
- Waltman, L., Van Eck, N.J., Van Leeuwen, T.N., Visser, M.S., & Van Raan, A.F.J. (2011). On the correlation between bibliometric indicators and peer review: Reply to Opthof and Leydesdorff. Scientometrics, 88(3), 1017-1022. doi:10.1007/s11192-011-0425-7.
- Waltman, L., Van Eck, N.J., Van Leeuwen, T.N., Visser, M.S., & Van Raan, A.F.J. (2011). Towards a new crown indicator: An empirical analysis. Scientometrics, 87(3), 467-481. doi:10.1007/s11192-011-0354-5.
- Waltman, L., Van Eck, N.J., Van Leeuwen, T.N., Visser, M.S., & Van Raan, A.F.J. (2011). Towards a new crown indicator: Some theoretical considerations. Journal of Informetrics, 5(1), 37-47. doi:10.1016/j.joi.2010.08.001.
- Zuccala, A., & Van Eck, N.J. (2011). Poverty research in a development policy context. Development Policy Review, 29(3), 311-330. doi:10.1111/j.1467-7679.2011.00535.x.
- Van Eck, N.J., & Waltman, L. (2010). Software survey: VOSviewer, a computer program for bibliometric mapping. Scientometrics, 84(2), 523-538. doi:10.1007/s11192-009-0146-3.
- Van Eck, N.J., Waltman, L., Dekker, R., & Van den Berg, J. (2010). A comparison of two techniques for bibliometric mapping: Multidimensional scaling and VOS. Journal of the American Society for Information Science and Technology, 61(12), 2405-2416. doi:10.1002/asi.21421.
- Van Eck, N.J., Waltman, L., Noyons, E.C.M., & Buter, R.K. (2010). Automatic term identification for bibliometric mapping. Scientometrics, 82(3), 581-596. doi:10.1007/s11192-010-0173-0.
- Van Raan, A.F.J., Van Leeuwen, T.N., Visser, M.S., Van Eck, N.J., & Waltman, L. (2010). Rivals for the crown: Reply to Opthof and Leydesdorff. Journal of Informetrics, 4(3), 431-435. doi:10.1016/j.joi.2010.03.008.
- Waaijer, C.J.F., Van Bochove, C.A., & Van Eck, N.J. (2010). Journal Editorials give indication of driving science issues. Nature, 463, 157-157. doi:10.1038/463157a.
- Waltman, L., & Van Eck, N.J. (2010). The relation between Eigenfactor, audience factor, and influence weight. Journal of the American Society for Information Science and Technology, 61(7), 1476-1486. doi:10.1002/asi.21354.
- Waltman, L., Van Eck, N.J., & Noyons, E.C.M. (2010). A unified approach to mapping and clustering of bibliometric networks. Journal of Informetrics, 4(4), 629-635. doi:10.1016/j.joi.2010.07.002.
- Van Eck, N.J., & Waltman, L. (2009). How to Normalize Cooccurrence Data? An Analysis of Some Well-Known Similarity Measures. Journal of the American Society for Information Science and Technology, 60(8), 1635-1651. doi:10.1002/asi.21075.
- Van Eck, N.J., & Waltman, L. (2009). On the proper understanding of the limiting behavior of generalizations of the h- and g-indices. Journal of Informetrics, 3(4). doi:10.1016/j.joi.2009.02.002.
- Waltman, L., & Van Eck, N.J. (2009). A simple alternative to the h-index. ISSI Newsletter, 5(3), 46-48.
- Waltman, L., & Van Eck, N.J. (2009). Robust Evolutionary Algorithm Design for Socio-Economic Simulation: Some Comments. Computational Economics, 33(1), 103-105. doi:10.1007/s10614-008-9148-0.
- Waltman, L., & Van Eck, N.J. (2009). Some comments on Egghe's derivation of the impact factor distribution. Journal of Informetrics, 3(4), 363-366. doi:10.1016/j.joi.2009.05.004.
- Van Eck, N.J., & Van Wezel, M. (2008). Application of reinforcement learning to the game of Othello. Computers & Operations Research, 35(6), 1999-2017. doi:10.1016/j.cor.2006.10.004.
- Van Eck, N.J., & Waltman, L. (2008). Appropriate similarity measures for author co-citation analysis. Journal of the American Society for Information Science and Technology, 59(10), 1653-1661. doi:10.1002/asi.20872.
- Van Eck, N.J., & Waltman, L. (2008). Generalizing the h- and g- indices. Journal of Informetrics, 2(4), 263-271. doi:10.1016/j.joi.2008.09.004.
- Waltman, L., & Van Eck, N.J. (2008). Some comments on the journal weighted impact factor proposed by Habibzadeh and Yadollahie. Journal of Informetrics, 2(4), 369-372. doi:10.1016/j.joi.2008.06.003.
- Van Eck, N.J., & Waltman, L. (2007). Bibliometric mapping of the computational intelligence field. International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems, 15(5), 625-645. doi:10.1142/S0218488507004911.
- Waltman, L., & Van Eck, N.J. (2007). Some comments on the question whether co-occurrence data should be normalized. Journal of the American Society for Information Science and Technology, 58(11), 1701-1703. doi:10.1002/asi.20647.
- Van Eck, N.J., Waltman, L., Van den Berg, J., & Kaymak, U. (2006). Visualizing the computational intelligence field. IEEE Computational Intelligence Magazine, 1(4), 6-10. doi:10.1109/MCI.2006.329702.
Conference publications (23)
- Waltman, L., & Van Eck, N.J. (2016). The need for contextualized scientometric analysis: An opinion paper. In Proceedings of the 21th International Conference on Science and Technology Indicators (pp. 541-549).
- Waltman, L., & Van Eck, N.J. (2015). Field-normalized citation impact indicators and the choice of an appropriate counting method. In Proceedings of the 15th International Conference of the International Society for Scientometrics and Informetrics (pp. 328-339).
- Caron, E., & Van Eck, N.J. (2014). Large scale author name disambiguation using rule-based scoring and clustering. In Proceedings of the 19th International Conference on Science and Technology Indicators (pp. 79-86).
- Van Eck, N.J., & Waltman, L. (2014). CitNetExplorer: A new software tool for analyzing and visualizing citation networks. In Proceedings of the 19th International Conference on Science and Technology Indicators (pp. 181-192).
- Zahedi, Z., & Van Eck, N.J. (2014). Visualizing readership activity of Mendeley users using VOSviewer. In altmetrics14: expanding impacts and metrics - An ACM Web Science Conference 2014 Altmetrics Workshop. doi:10.6084/m9.figshare.1041819.
- Waltman, L., & Van Eck, N.J. (2013). A systematic empirical comparison of different approaches for normalizing citation impact indicators. In Proceedings of the 14th International Conference of the International Society for Scientometrics and Informetrics (pp. 1649-1664).
- Waltman, L., Wouters, P., & Van Eck, N.J. (2013). Counting publications and citations: Is more always better? 14th International Conference of the International Society for Scientometrics and Informetrics, Vienna. In Proceedings of the 14th International Conference of the International Society for Scientometrics and Informetrics (pp. 455-467).
- Tijssen, R.J.W., Waltman, L., & Van Eck, N.J. (2012). Research collaboration and the expanding science grid: Measuring globalization processes worldwide. In Proceedings of the 17th International Conference on Science and Technology Indicators (pp. 779-790).
- Waltman, L., & Van Eck, N.J. (2012). Constructing a publication-level classification system of science. In Proceedings of the 17th International Conference on Science and Technology Indicators (pp. 803-814).
- Waltman, L., Calero-Medina, C.M., Kosten, M.J.F., Noyons, E.C.M., Tijssen, R.J.W., Van Eck, N.J., Van Leeuwen, T.N., Van Raan, A.F.J., Visser, M.S., & Wouters, P. (2012). The Leiden Ranking 2011/2012: Data collection, indicators, and interpretation. In Proceedings of the 17th International Conference on Science and Technology Indicators (pp. 791-802).
- Luwel, M.J.J., Noyons, E.C.M., & Van Eck, N.J. (2011). A comparative bibliometric analysis of the STI and the ISSI conference series. In Proceedings of the 13th International Conference of the International Society for Scientometrics and Informetrics (pp. 505-514).
- Van Eck, N.J., Tijssen, R.J.W., & Waltman, L. (2011). Globalization of public-private research in worldwide science: co-publication trends and geographical distances between research partners . In Proceedings of the 2011 Atlanta Conference on Science and Innovation Policy.
- Van Eck, N.J., Waltman, L., & Tijssen, R.J.W. (2011). Globalization of science: Geographical distance measurements of research collaboration. In Proceedings of the 13th International Conference of the International Society for Scientometrics and Informetrics (pp. 181-186).
- Van Eck, N.J., & Waltman, L. (2009). VOSviewer: A computer program for bibliometric mapping . In Proceedings of the 12th International Conference of the International Society for Scientometrics and Informetrics.
- Van Eck, N.J., & Waltman, L. (2009). VOSviewer: A computer program for bibliometric mapping. In Proceedings of the 12th International Conference on Scientometrics and Informetrics (pp. 886-897).
- Waltman, L., & Van Eck, N.J. (2009). A Taxonomy of Bibliometric Performance Indicators Based on the Property of Consistency. In Proceedings of the 12th International Conference of the International Society for Scientometrics and Informetrics (pp. 1002-1003).
- Van Eck, N.J., Frasincar, F., & Chang, D. (2008). Cluster-based visualization of concept associations. In Proceedings of the 12th International Conference on Information Visualisation (pp. 409-414).
- Kruse, R., Borgelt, C., Nauck, D.D., Van Eck, N.J., & Steinbrecher, M. (2007). The role of soft computing in intelligent data analysis. In Final Program and Abstracts of the 2007 IEEE International Conference on Fuzzy Systems (pp. 9-17).
- Soni, A., Van Eck, N.J., & Kaymak, U. (2007). Prediction of stock price movements based on concept map information. In Proceedings of the 2007 IEEE Symposium on Computational Intelligence in Multicriteria Decision Making (pp. 205-211). doi:10.1109/MCDM.2007.369438.
- Van Eck, N.J., Frasincar, F., & Van den Berg, J. (2006). Visualizing concept associations using concept density maps. In Proceedings of the 10th International Conference on Information Visualisation (pp. 270-275). doi:10.1109/IV.2006.128.
- Van Eck, N.J., Waltman, L., Van den Berg, J., & Kaymak, U. (2006). Visualizing the WCCI 2006 knowledge domain. In Proceedings of the 2006 IEEE International Conference on Fuzzy Systems (pp. 1671-1678). doi:10.1109/FUZZY.2006.1681931.
- Van Eck, N.J., Waltman, L., & Van den Berg, J. (2005). A novel algorithm for visualizing concept associations. In Proceedings of the 16th International Workshop on Database and Expert Systems Applications (pp. 405-409). doi:10.1109/DEXA.2005.23.
- Van den Berg, J., Van Eck, N.J., Waltman, L., & Kaymak, U. (2004). A VICORE architecture for intelligent knowledge management. In Proceedings of the KDNet Symposium on Knowledge-Based Services for the Public Sector (pp. 63-74).
Book chapters (3)
- Van Eck, N.J., & Waltman, L. (2014). Visualizing bibliometric networks. In Y. Ding, R. Rousseau, & D. Wolfram (Eds.), Measuring Scholarly Impact (pp. 285-320). Springer International Publishing. doi:10.1007/978-3-319-10377-8_13.
- Soni, A., Van Eck, N.J., & Kaymak, U. (2013). Predicting stock price movements from concept map information. In N.S. Thomaidis, & G.H. Dash (Eds.), Recent Advances in Computational Finance (pp. 173-186). Nova Science Publishers.
- Van Eck, N.J., & Waltman, L. (2007). VOS: A new method for visualizing similarities between objects. In R. Decker, & H.J. Lenz (Eds.), Studies in Classification, Data Analysis, and Knowledge Organization (pp. 299-306). Springer. doi:10.1007/978-3-540-70981-7_34.