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  • CWTS :: Blog
    Leiden Ranking CWTS Journal Indicators CitNetExplorer VOSviewer About CWTS About Leiden Contact Links Leiden University CWTS B V CWTS Leiden Ranking CWTS Journal Indicators CitNetExplorer VOSviewer Centre for Science and Technology Studies Centre for Science and Technology Studies 2333AL Leiden Zuid Holland 31715273909 http www cwts nl For full functionality of this site it is necessary to enable JavaScript Here are the instructions how to enable JavaScript in your web

    Original URL path: http://www.cwts.nl/blog?s=57 (2016-02-06)
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  • Ludo Waltman
    mining and visualization using VOSviewer ISSI Newsletter 7 3 50 54 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 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 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

    Original URL path: http://www.cwts.nl/people/ludowaltman (2016-02-06)
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  • Rodrigo Costas
    American Society for Information Science and Technology 63 8 1647 1661 doi 10 1002 asi 22692 Costas R Van Leeuwen T N Bordons M 2012 Referencing patterns of individual researchers Do top scientists rely on more extensive information sources Journal of the American Society for Information Science and Technology 63 12 2433 2450 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 Costas R Bordons M 2011 Do age and professional rank influence the order of authorship in scientific publications Some evidence from a micro level perspective Scientometrics 88 1 145 161 Costas R Van Leeuwen T N Van Raan A F J 2011 The Mendel syndrome in science durability of scientific literature and its effects on bibliometric analysis of individual scientists Scientometrics 89 1 177 205 doi 10 1007 s11192 011 0436 4 Costas R Van Leeuwen T N Bordons M 2010 A Bibliometric Classificatory Approach for the Study and Assessment of Research Performance at the Individual Level The Effects of Age on Productivity and Impact Journal of the American Society for Information Science and Technology 61 8 1564 1581 Costas R Van Leeuwen T N Bordons M 2010 Self citations at the meso and individual levels effects of different calculation methods Scientometrics 82 3 517 537 doi 10 1007 s11192 010 0187 7 Costas R Van Leeuwen T N Van Raan A F J 2010 Is scientific literature subject to a sell by date A general methodology to analyze the durability of scientific documents Journal of the American Society for Information Science and Technology 61 2 329 339 Costas R Bordons M Van Leeuwen T N Van Raan A F J 2009 Scaling Rules in the Science System Influence of Field Specific Citation Characteristics on the impact of Individual Researchers Journal of the American Society for Information Science and Technology 60 4 740 753 doi 10 1002 asi 21017 Costas R Bordons M 2008 Development of a thematic filter for the bibliometric delimitation on interdisciplinary area the case of Marine Science Revista Espanola de Documentacion Cientifica 31 2 261 272 Costas R Bordons M 2008 Is g index better than h index An exploratory study at the individual level Scientometrics 77 2 267 288 Costas R Moreno L Bordons M 2008 Overlapping and singularity of MEDLINE WoS and IME for the analysis of the scientific activity of a region in Health Sciences Revista Espanola de Documentacion Cientifica 31 3 327 343 Costas R Bordons M 2007 A classificatory scheme for the analysis of bibliometric profiles at the micro level Proceedings of the 11th International Conference of the International Society for Scientometrics and Informetrics 226 230 Costas R Bordons M 2007 A critical view of the h index observations based on a practical application Profesional de la Informacion 16 5 427 432 Costas R Bordons M 2007 Algorithms

    Original URL path: http://www.cwts.nl/people/rodrigocostas (2016-02-06)
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  • Zohreh Zahedi
    Zohreh is investigating the different altmetrics data sources and tools to study the possibilities of measuring online evidence of scholarly outputs to assess their reliability and validity as well as the feasibility of their applications in research assessments purposes to investigate whether alternative metrics can be useful for research assessment and complement the traditional metrics Beyond the immediate subject of her PhD Zohreh is also involved in working groups Career in Policy Path in Science and Societal Impact of Research SURE and particularly contributes to the Altmetrics research line as part of the CWTS SURE working group She has published a number of papers on the topics of altmetrics and other topics Zohreh has received several grants honors and awards during her PhD at CWTS among them are Leiden University Fund proposal award for doing a collaborative altmetrics project research visit in the University of Montreal Canada Thomson Reuters 1 AM altmetrics project funding award and the most important one is that she has awarded an Honorable mention of the Eugene Garfield Doctoral Dissertation Scholarship Award by the ISSI committee at the 15th International Conference on Scientometrics and Informetrics ISSI 2015 Bogazici University Istanbul Turkey for her PhD dissertation possibilities and feasibility of using altmetric measurements social media metrics in research evaluation Publications Journal publications 4 Costas R Zahedi Z Wouters P 2015 Do altmetrics correlate with citations Extensive comparison of altmetric indicators with citations from a multidisciplinary perspective Journal of the Association for Information Science and Technology 66 10 2003 2019 Costas R Zahedi Z Wouters P 2015 The thematic orientation of publications mentioned on social media Large scale disciplinary comparison of social media metrics with citations Aslib Journal of Information Management 67 3 260 288 doi 10 1108 AJIM 12 2014 0173 Robinson Garcia N Torres Salinas D Zahedi Z Costas R 2014 Nuevos datos nuevas posibilidades Revelando el interior de Altmetric com New data new possibilities Exploring the insides of Altmetric com El Profesional de la Information 23 4 359 366 doi 10 3145 epi 2014 jul 03 Zahedi Z Costas R Wouters P 2014 How well developed are altmetrics A cross disciplinary analysis of the presence of alternative metrics in scientific publications Scientometrics 101 2 1491 1513 doi 10 1007 s11192 014 1264 0 Conference publications 10 Zahedi Z Costas R Wouters P 2015 Do mendeley readership counts help to filter highly cited WoS publications better than average citation impact of journals JCS In Proceedings of the 15th International Conference of the International Society for Scientometrics and Informetrics pp 16 25 Costas R Zahedi Z Wouters P 2014 Disentangling the meaning of altmetrics Content analysis of Web of Science scientific publications In altmetrics14 expanding impacts and metrics An ACM Web Science Conference 2014 Altmetrics Workshop Meijer I Zahedi Z Belder R Van der Weijden I C M 2014 Researchers with a personal grant Perceptions on societal relevance and outputs In Research Funding Dynamics of Science Workshop Van der Weijden I C M Zahedi Z Must Ü

    Original URL path: http://www.cwts.nl/people/zohrehzahedi (2016-02-06)
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  • Alex Rushforth
    Centre for Science and Technology Studies Centre for Science and Technology Studies 2333AL Leiden Zuid Holland 31715273909 http www cwts nl For full functionality of this site it is necessary to enable JavaScript Here are the instructions how to enable JavaScript in your web browser People Alex Rushforth Alex Rushforth PhD Alex Rushforth is a researcher at CWTS Leiden University He works in the areas of sociology of science higher education and organizational sociology Whilst training at the Universities of Surrey and York in the United Kingdom he has developed interests in the evolving governance of public sciences and in particular its impact upon the research process itself This interest was spawned through a PhD in organization studies comparing the impact of research policy reforms specifically the shift in attention towards translational science on different domains of medical science in British universities This comparative approach towards governance effects has continued into his current work with the EPIC working group at CWTS which focuses on the impact of performance based evaluation and metrics on biomedical research in Dutch and British academic medical schools Publications Journal publications 3 De Rijcke S Rushforth A D 2015 To intervene or not to intervene is

    Original URL path: http://www.cwts.nl/people/alexrushforth (2016-02-06)
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  • Marc Luwel
    full functionality of this site it is necessary to enable JavaScript Here are the instructions how to enable JavaScript in your web browser People Marc Luwel Marc Luwel PhD Marc Luwel PhD in Physics He is the Director of the Flemish Agency for Research Infrastructure Herculesstichting Hercules Foundation and a guest researcher at the Centre for Science and Technology Studies CWTS University of Leiden His research interests include performance based funding in higher education and measuring outcome and impact of publicly funded research He has been i a Vice Chair of the Accreditation Organization of the Netherlands and Flanders NVAO deputy chief of staff of the Flemish Minister of Education and Science and an adviser to the Belgian Prime Minister Publications Journal publications 5 Luwel M J J Van Wijk E 2015 The translational effect in medical journals Bridging the gap Research Evaluation 24 1 19 29 Visser M S Luwel M J J Moed H F 2007 Attainment of Doctoral Degrees at Flemish Universities A Survival Analysis Higher Education 54 741 757 doi 10 1007 s10734 006 9021 9 Luwel M J J Noyons E C M Moed H F 1999 Bibliometric assessment of research performance in Flanders Policy background and implications R D Management 29 2 133 141 Noyons E C M Luwel M J J Moed H F 1999 Combining mapping and citation analysis for evaluative bibliometric purposes Journal of the American Society for Information Science 50 2 115 131 Noyons E C M Luwel M J J Moed H F 1998 Assessment of Flemish R D in the field of information technology a bibliometric evaluation based on publication and patent data combined with OECD research input statistics Research Policy 27 3 285 300 Conference publications 3 Van Leeuwen T N Luwel M J J 2014 An

    Original URL path: http://www.cwts.nl/people/marcluwel (2016-02-06)
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  • Erik van Wijk
    Centre for Science and Technology Studies 2333AL Leiden Zuid Holland 31715273909 http www cwts nl For full functionality of this site it is necessary to enable JavaScript Here are the instructions how to enable JavaScript in your web browser People Erik van Wijk Erik van Wijk MA Publications Journal publications 6 Luwel M J J Van Wijk E 2015 The translational effect in medical journals Bridging the gap Research Evaluation 24 1 19 29 Tijssen R J W Van Leeuwen T N Van Wijk E 2009 Benchmarking university industry research cooperation worldwide performance measurements and indicators based on co authorship data for the world s largest universities Research Evaluation 18 1 13 24 doi 10 3152 095820209X393145 Van Raan A F J Visser M S Van Leeuwen T N Van Wijk E 2003 Bibliometric analysis of Performance assessment and position in the journal landscape Psychotherapy Research 13 4 511 528 doi 10 1093 ptr kpg038 Tijssen R J W Van Wijk E 1999 In search of the European Paradox an international comparison of Europe s scientific performance and knowledge flows in information and communication technologies research Research Policy 28 5 519 543 Tijssen R J W Van Wijk E 1998

    Original URL path: http://www.cwts.nl/people/erikvanwijk (2016-02-06)
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  • Robert Tijssen
    authorship data for the world s largest universities Research Evaluation 18 1 13 24 doi 10 3152 095820209X393145 Jonkers K Tijssen R J W 2008 Chinese researchers returning home impacts of international mobility on research cooperation and scientific productivity Scientometrics 77 299 323 Lambers Heerspink H J Knol M J Tijssen R J W Van Leeuwen T N Grobbee D E De Zeeuw D 2008 Is the randomised controlled drug trial in Europe lagging behind the US British Journal of Clinical Pharmacology 66 774 790 doi 10 1111 j 1365 2125 2008 03296 x Calero Medina C M Van Leeuwen T N Tijssen R J W 2007 Research cooperation within the bio pharmaceutical industry Network analyses of co publications within and between firms Scientometrics 71 1 87 99 doi 10 1007 s11192 007 1650 y Tijssen R J W 2007 Africa s contribution to the worldwide research literature new analytical perspectives trends and performance indicators Scientometrics 71 303 327 Tijssen R J W 2006 Universities and industrially relevant science towards measurement models and indicators of entrepreneurial universities Research Policy 35 1569 1585 Tijssen R J W Van Leeuwen T N 2006 Measuring impacts of academic science on industrial research A citation based approach Scientometrics 66 55 69 doi 10 1007 s11192 006 0005 4 Tijssen R J W Mouton J Van Leeuwen T N Boshoff N 2006 How relevant are local scholarly journals in global science A case study of South Africa Research Evaluation 15 3 163 174 doi 10 3152 147154406781775904 Van Looy B Debackere K Callaert C Tijssen R J W Van Leeuwen T N 2006 Scientific capabilities and technological performance of national innovation systems An exploration of emerging industrial relevant research domains Scientometrics 66 295 310 doi 10 1007 s11192 006 0030 3 Tijssen R J W 2004 Is the commercialisation of scientific research affecting the production of public knowledge Global trends in the output of corporate research articles Research Policy 33 5 709 733 Tijssen R J W 2003 Scoreboards of research excellence Research Evaluation 12 2 91 104 Tijssen R J W 2002 Science dependence of technologies Evidence from inventions and their inventors Research Policy 31 4 509 526 Tijssen R J W Visser M S Van Leeuwen T N 2002 Benchmarking international scientific excellence Are highly cited research papers an appropriate frame of reference Scientometrics 54 3 381 397 doi 10 1023 A 1016082432660 Tijssen R J W 2001 Global and domestic utilization of industrial relevant science patent citation analysis of science technology interactions and knowledge flows Research Policy 30 35 54 Van Leeuwen T N Moed H F Tijssen R J W Visser M S Van Raan A F J 2001 Language biases in the coverage of the Science Citation Index and its consequences for international comparisons of national research performance Scientometrics 51 1 335 346 Tijssen R J W Buter R K Van Leeuwen T N 2000 Technological relevance of science An assessment of citation linkages between patents and research papers Scientometrics

    Original URL path: http://www.cwts.nl/people/roberttijssen (2016-02-06)
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