About the Authors
- Kevin W. Boyack
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* E-mail: kboyack@mapofscience.com
Affiliation SciTech Strategies, Inc., Albuquerque, New Mexico, United States of America
- David Newman
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Affiliations University of California Irvine, Irvine, California, United States of America, NICTA Victorian Research Laboratory, Melbourne, Australia
- Russell J. Duhon
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Affiliation School of Library and Information Science, Indiana University, Bloomington, Indiana, United States of America
- Richard Klavans
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Affiliation SciTech Strategies, Inc., Berwyn, Pennsylvania, United States of America
- Michael Patek
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Affiliation SciTech Strategies, Inc., Berwyn, Pennsylvania, United States of America
- Joseph R. Biberstine
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Affiliation School of Library and Information Science, Indiana University, Bloomington, Indiana, United States of America
- Bob Schijvenaars
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Affiliation Collexis, Inc., Geldermalsen, The Netherlands
- André Skupin
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Affiliation Department of Geography, San Diego State University, San Diego, California, United States of America
- Nianli Ma
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Affiliation School of Library and Information Science, Indiana University, Bloomington, Indiana, United States of America
- Katy Börner
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Affiliation School of Library and Information Science, Indiana University, Bloomington, Indiana, United States of America
Competing Interests
The authors have the following interests to declare: Authors Boyack, Klavans, and Patek are all employed by SciTech Strategies, Inc.; author Schijvenaars is employed by Collexis, Inc. No patent or product based on this work is under development. This commercial affiliation does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials. Data from this study are available for download at http://sci.slis.indiana.edu/sts/.
Author Contributions
Conceived and designed the experiments: KWB RK KB. Performed the experiments: KWB DN RJD MP JRB BS AS NM. Analyzed the data: KWB RK KB. Contributed reagents/materials/analysis tools: KWB DN RJD MP JRB BS AS NM. Wrote the paper: KWB DN RJD JRB BS AS KB.