advanced bibliometric software tools for publishers and editors

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Advanced bibliometric software tools for publishers and editors Nees Jan van Eck Centre for Science and Technology Studies (CWTS), Leiden University Training course on “Big data and academic publication” National Science Library, CAS, Beijing, China, June 22, 2016

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Advanced bibliometric software

tools for publishers and editors

Nees Jan van Eck

Centre for Science and Technology Studies (CWTS), Leiden University

Training course on “Big data and academic publication”

National Science Library, CAS, Beijing, China, June 22, 2016

About myself (1)

• Master in computer science

• PhD thesis on bibliometric

mapping of science

• Researcher at CWTS since 2009

– Bibliometric network analysis and

visualization

– Bibliometric indicators of research

performance

• Head of ICT

• Board member

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About myself (2)

• Editorial board member of

– Journal of the Association for Information Science and Technology

– Journal of Data and Information Science

– Journal of Informetrics

– Scientometrics

• Editor brief communications JASIST

• Board member ISSI

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Centre for Science and Technology

Studies (CWTS)

• Research center at Leiden University

focusing on science and technology

studies

• About 30 staff members

• History of more than 25 years in

bibliometric and scientometric

research

• Contract research

• Full access to large bibliographic

database (Web of Science and

Scopus)

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Bibliographic databases: ‘Big data’

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Web of Science Scopus

Journals 12,000 20,000

Publications 45 million 35 million

Citations 1 billion 0.9 billion

Bibliometric networks

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Web of

Science

Scopus

Citation network

of pubs / authors / journals

Co-authorship network

of authors / organizations

Co-citation network

of pubs / authors / journals

Co-occurrence network

of keywords / terms

Bibliographic coupling network

of pubs / authors / journals

Bibliographic

database

Software tools

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Software tools

• VOSviewer (www.vosviewer.com)

– Tool for constructing and visualizing bibliometric networks

• CitNetExplorer (www.citnetexplorer.nl)

– Tool for visualizing and analyzing citation networks of

publications

• Both tools have been developed together

with my colleague Ludo Waltman 7

VOSviewer

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VOSviewer

• Software tool for visualizing (bibliometric) networks

• Built-in support for popular bibliographic databases

– Web of Science

– Scopus

– PubMed

– RIS files

• Text mining functionality

• Layout and clustering techniques

• Advanced visualization features:

– Smart labeling algorithm

– Overlay visualizations

– Density visualizations (‘heat map’)

• Users:

– Researchers

– Professional users (e.g., universities, libraries, funders, publishers)9

Increasing use of VOSviewer in

scientific publications

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CitNetExplorer

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Why use CitNetExplorer?

• To analyze the structure and development of a

research field

– Example: Identifying the main topics in the field of

scientometrics and tracing the developments within each topic

• To delineate a research area

– Example: Delineating the literature on science mapping

• To study publication oeuvres

– Example: Identifying the publications of a researcher and

analyzing the influence of cited and citing publications

• To support literature reviewing

– Example: Reviewing the literature on the h-index

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• Any type of bibliometric

network

• Co-authorship, direct citations,

co-citation, and bibliographic

coupling

• Time dimension is ignored

• Networks of at most ~10,000

nodes are supported

• Only citation networks of

publications

• Direct citation between

publications

• Time dimension is explicitly

considered

• Millions of publications are

supported

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VOSviewer CitNetExplorer

VOSviewer

demo

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Data

• Journals:

– Journal of the Association for Information Science and

Technology (JASIST)

– Journal of Informetrics

– Scientometrics

• Period: 2006-2015

• No. of publications: 5,150

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Term map

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Interpretation of a term map

• Size:

– The larger a term, the higher the frequency of occurrence of the

term

• Distance:

– In general, the smaller the distance between two terms, the

higher the relatedness of the terms, as measured by co-

occurrences

– The horizontal and vertical axes have no special meaning; maps

can be freely rotated and flipped

• Colors:

– Colors indicate clusters of closely related terms

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Term map – Average publication year

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Term map – Average citation impact

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Term map – Journal of Informetrics

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Term map - Scientometrics

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Term map - JASIST

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Term map - USA

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Term map - China

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Term map – The Netherlands

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Co-authorship map of authors

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Co-citation map of sources

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Bibliographic map of publications

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CitNetExplorer

demo

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More

information

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Do it yourself!

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www.vosviewer.com www.citnetexplorer.nl

Publications on VOSviewer

• Van Eck, N.J., & Waltman, L. (2014). Visualizing bibliometric networks. In Y.

Ding, R. Rousseau, & D. Wolfram (Eds.), Measuring scholarly impact: Methods

and practice (pp. 285-320). Springer. 10.1007/978-3-319-10377-8_13

• Van Eck, N.J., & Waltman, L. (2010). Software survey: VOSviewer, a computer

program for bibliometric mapping. Scientometrics, 84(2), 523-538.

10.1007/s11192-009-0146-3

• 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. 10.1016/j.joi.2010.07.002

• 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. JASIST, 61(12), 2405-2416. 10.1002/asi.21421

• Waltman, L., & Van Eck, N.J. (2013). A smart local moving algorithm for large-

scale modularity-based community detection. European Physical Journal B,

86(11), 471. 10.1140/epjb/e2013-40829-0

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Publications on CitNetExplorer

• 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. 10.1016/j.joi.2014.07.006

• Van Eck, N.J., & Waltman, L. (2014). Systematic retrieval of scientific literature

based on citation relations: Introducing the CitNetExplorer tool. In

Proceedings of the First Workshop on Bibliometric-enhanced Information

Retrieval (BIR 2014), pages 13-20. ceur-ws.org/Vol-1143/paper2.pdf

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Course: Bibliometric Network Analysis

and Science Mapping Using VOSviewer

• April 6-7, 2017

• Leiden University, The Netherlands

• Participants are introduced into the main

techniques for bibliometric network analysis and

science mapping

• Special attention is paid to applications in a

research evaluation and science policy context

• www.cwts.nl

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Thank you for your attention!

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