Citation Maps

Here are a few maps of research fields created through author co-citation analysis and author bibliographic coupling analysis. Details of how these maps were created are provided in our 2008 and 2014 papers published in Journal of the American Society for Information Science and Technology. A brief summary of how to read these maps is provided below.

Coronavirus Research

Intellectual Structure of Coronavirus Research

Data: Coronavirus (e.g., COVID-19) Research records in Web of Science Core Collection mapped to the PubMed database
Authors mapped: the 300 authors whose first-author oeuvres were most highly cited in our dataset
Source: Mei, J., Zhao, D., & Strotmann, A. (2014). Intellectual Structure of Coronavirus Research: A Perspective From an Author Cocitation Analysis. Frontiers in Research Metrics and Analytics, 10 November 2020. DOI: https://doi.org/10.3389/frma.2020.595370.

Information Science 2011-2020


Intellectual structure of IS 2011-2015	Intellectual structure of IS 2016-2020

Data: Full Web of Science records of research articles in core information science journals published during 2011-2020
Authors mapped: About 150 most highly cited authors in each of the two 5-year time periods
Source: Zhao, D., & Strotmann, A. (2022). Intellectual structure of information science 2011–2020: An author co-citation analysis. Journal of Documentation. 78 (3), 728-744. https://doi.org/10.1108/JD-06-2021-0119.

Information Science 2006-2010


Knowledge Base	Research Front

Data: Web of Science records of all articles published in 12 core Information Science journals during 2006-2010.
Authors mapped: 150 most highly cited for Knowledge Base; 150 most published and highly connected to the field for Research Front.
Source: Zhao, D., & Strotmann, A. (2014). Knowledge base and research front of Information science 2006-2010: An author co-citation and bibliographic coupling analysis. Journal of the American Society for Information Science and Technology, 65 (JASIS&T)

Information Science 1996-2005


Structure of Major Specialties	Authors' Memberships in Specialties

Data: Web of Science records of all articles published in 12 core Information Science journals during 1996-2005.
Authors mapped: 120 most highly cited.
Source: Zhao, D., & Strotmann, A. (2008). Information Science during the first decade of the Web: An enriched author co-citation analysis. Journal of the American Society for Information Science and Technology, 59(6), 916-937 (JASIS&T)

Stem Cell Research 2004-2009


Intellectual Structure	Evolution of Intellectual Structure

Data: PubMed records of all articles retrieved by a MeSH term search for "stem cell" for the time period 2004-2009, and their cited references retrieved from Scopus.
Authors mapped: 200 top-ranked researchers by fractional citation count.
Sources:
- Zhao, D., & Strotmann, A. (2011). Intellectual structure of Stem Cell research: A comprehensive author co-citation analysis of a highly collaborative and multidisciplinary field. Scientometrics, 87(1), 115-131 (Scientometrics) - left
- Strotmann, A. & Zhao, D. (2011). Evolution of stem cell research 2004-2009: A citation analysis perspective, Stem Cell Europe 2011, July 20-21, 2011, Edinburgh, United Kingdom. Poster presentation. - right

XML research


Structure of Major Specialties	Authors' Memberships in Specialties

Data: Web of Science records of all articles retrieved by a topic search for "XML" or "eXtensible Markup Language" for the time period 2001 to 2005.
Authors mapped: 100 most highly cited.
Source: Zhao, D., & Strotmann, A. (2008). Information Science during the first decade of the Web: An enriched author co-citation analysis. Journal of the American Society for Information Science and Technology, 59(6), 916-937 (JASIS&T)

Knowledge Mangement

Thumbnail of ACA map (Knowledge Management)

Major Specialties and
Authors' Memberships in Specialties

Data: Web of Science records of all articles retrieved by a topic search for "Knowledge management" for the time period 2001-2006.
Authors mapped: 80 most highly cited.
Source: work in progress.

How to read the maps

The circular nodes represent specialties and the square nodes authors. The size of a specialty node is an approximate indicator of its overall significance in the map. The color of an author node indicates the number of specialties in which this author has membership: yellow for authors who only have membership in a single specialty, green for two specialties, red for three, and blue for four specialties.

The width and the greyscale value of lines connecting nodes represent the degree of relatedness, with darker and thicker lines representing closer ties. Dashed lines represent counter-relationships, i.e., dissimilarities.

On more recent maps (i.e., information science 2006-2010), the size of an author node is determined by citation count, and indicates the author's citation impact on the research field. The foreground links indicate unique contributions of author to research area, and background links represent a combination of unique contributions of author to research area and the correlation between research areas.