1 Introduction
1.1 Efforts to Classify Research
WCs to enable a more precise evaluation of a given discipline (van Leeuwen & Calero Medina, 2012). Another journal classification system in terms of fields and subfields has been made available by Elsevier’s Scopus in the meantime, but Wang and Waltman (2016) found it to be more problematic than WCs, in particular due to the high rate of multiple category assignments of a journal(2)((2)The field/subfield classification of Scopus is available in the journal list from http://www.elsevier.com/online-tools/scopus/content-overview. WCs are available (under subscription) athttp://images.webofknowledge.com/WOKRS56B5/help/WOS/hp_subject_category_terms_tasca.html.).
1.2 Description of WCs as Fields of Science
2 Data and Methods
2.1 The Mapping
Table 1 Numbers of journals and Web of Science categories in SCI and SSCI. |
Journals | WCS | |
---|---|---|
SCI | 8,778 | 177 |
SSCI | 3,212 | 57 |
Sum | 11,990 | 234 |
Total | 11,365 | 227 |
Overlap | 625 | 6(6) |
Figure 1. Five-cluster basemap for 2015 (based on VOSviewer)(9). |
2.2 Measures of Disciplinary Diversity
2.3 Mapping Options
3 Case Examples
Figure 2. Science overlay map for Pfizer. |
Figure 3. Science overlay map for Unilever. |
Figure 4. Science overlay map for Georgia Tech. |
Figure 5. Science overlay map for the London School of Economics. |
Figure 6. Science overlay map for the University of Amsterdam. |
Figure 7. Science overlay map for the School of Public Policy, Georgia Tech. |
Figure 8. Science overlay map for dye-sensitized solar cells. |
Figure 9. Science overlay map for “Big Data.” |
4 Discussion
Acknowledgements
Author Contributions
Appendix A
Figure A-1. Basemap 2010, using Pajek with a four-factor analysis decomposition. |
Figure A-2: Basemap 2015, using VOSViewer with a five-cluster decomposition. Settings: Attraction 2, Repulsion 0(13). |
Figure A-3. 2015 basemap with a 18-cluster decomposition. |
Figure A-4. 18-cluster science overlay map for the London School of Economics (LSE). |
Figure A-5. Science overlay map for South Africa (based on 72,937 records in a simple search on cu = South Africa for 2010-2015 in SCI+SSCI). |
Appendix B: Creating Your Own Science Overlay Maps
VOSviewer
Pajek
Rao-Stirling Diversity
Appendix C: Details on Data Searches for the Example Maps
Web of Science Search for University of Amsterdam (AMS) Publications
OR (BIOCENTRUM UNIV AMSTERDAM AND University of Amsterdam) OR (CHEMIEWINKEL UNIV AMSTERDAM AND University of Amsterdam) OR (CTR UNIV AMSTERDAM AND University of Amsterdam) OR (GEMEENTE UNIV AMSTERDAM AND University of Amsterdam) OR (GEMEENTELIJKE UNIV AMSTERDAM AND University of Amsterdam) OR (INHOLLAND UNIV AMSTERDAM AND University of Amsterdam) OR (NETSPAR UNIV AMSTERDAM AND University of Amsterdam) OR (RES UNIV AMSTERDAM AND University of Amsterdam) OR (RIJKSUNIV AMSTERDAM AND University of Amsterdam) OR (U AMSTERDAM AND University of Amsterdam) OR (UNI AMSTERDAM AND University of Amsterdam) OR (UNIV AMSTERDAM AND University of Amsterdam) OR (UNIV AMSTERDAM 1 AND University of Amsterdam) OR (UNIV AMSTERDAM G1 106 AND University of Amsterdam) OR (UNIV AMSTERDAM IBED AND University of Amsterdam) OR (UNIV AMSTERDAM IBIS UVA AND University of Amsterdam) OR (UNIV AMSTERDAM LIB AND University of Amsterdam) OR (UNIV AMSTERDAM MED INFORMAT AND University of Amsterdam) OR (UNIV AMSTERDAM MED PHYS LAB AND University of Amsterdam) OR (UNIV AMSTERDAM MEDIA STUDIES AND University of Amsterdam) OR (UNIV AMSTERDAM NETSPAR AND University of Amsterdam) OR (UNIV AMSTERDAM NIKHEF AND University of Amsterdam) OR (UNIV AMSTERDAM NUTR DIETET AND University of Amsterdam) OR (UNIV AMSTERDAM POLIT SCI BIOL AND University of Amsterdam) OR (UNIV AMSTERDAM SANQUIN RES AND University of Amsterdam) OR (UNIV AMSTERDAM TAALWETENSCHAP AND University of Amsterdam) OR (UNIV AMSTERDAM UVA AND University of Amsterdam) OR (UNIV AMSTERDAM WILHELMINA GASTHUIS AND University of Amsterdam) OR (UNIV AMSTERDAM ZOOL LAB AND University of Amsterdam) OR (UVA UNIV AMSTERDAM AND University of Amsterdam) OR (UVA AMSTERDAM AND University of Amsterdam) OR (ZOOL UNIV AMSTERDAM AND University of Amsterdam)) AND YEAR PUBLISHED: (2010-2015)
Web of Science Search for Georgia Tech Publications
Web of Science Search for London School of Economics (LSE) Publications
Web of Science Search for Pfizer Publications
Web of Science Search for Unilever Publications
Web of Science Search for Dye-Sensitized Solar Cell (DSSC) Publications
Table C1 Search results of Big Data. |
No. | Search strategy | Big Data search terms (search conducted on 1/27/2016 by Alan) | Hits - 2006-2015 |
---|---|---|---|
1 | Core lexical query | TS = (“Big Data” or Bigdata or “Map Reduce” or MapReduce or Hadoop or Hbase or Nosql or Newsql) | 8,602 |
2 | Expanded lexical query | TS = ((Big Near/1 Data or Huge Near/1 Data) or “Massive Data” or “Data Lake” or “Massive Information” or “Huge Information” or “Big Information” or “Large-scale Data” or Petabyte or Exabyte or Zettabyte or “Semi-Structured Data” or “Semistructured Data” or “Unstructured Data”) | 11,798 |
TS = (“Cloud Comput*” or “Data Min*” or “Analytic*” or “Privacy” or “Data Manag*” or “Social Media*” or “Machine Learning” or “Social Network*” or “Security” or “Twitter*” or “Predict*” or “Stream*” or “Architect*” or “Distributed Comput*” or “Business Intelligence” or “GPU” or “Innovat*” or “GIS” or “Real-Time” or “Sensor Network*” or “Smart Grid*” or “Complex Network*” or “Genomics” or “Parallel Comput*” or “Support Vector Machine” or “SVM” or “Distributed” or “Scalab*” or “Time Serie*” or “Data Science” or “Informatics*” or “OLAP”) | 3,113,113 (part A AND part B = 7,696) | ||
3 | #1 OR (#2 AND #3); 2006-2016 | SCI = 4,673; SSCI = 1,026, of which 541 are not also in SCI - download 541; AHCI (not in SSCI) = 45 down; CPCI-S & CPCI-SSH = 6,267 (of which 6,093 not in SCI-SSCI - download) - hit 5,000 limit, so split - download 6,093; BCI-S & BCI-SSH = 376 - download all (ignore possible overlaps) ESCI - search #1 = 0; so leave that dB out; ** save the separate downloaded into VP files in case we want to analyze sometime - note trend behavior for 2015 differs greatly from SCI/SSCI (UP) to CPCI’s (DOWN). I think due largely to incomplete indexing at this date in WoS. Also saved the combo - 11,728 total - removed dups to get 11,684 (saved with the component files on the flash memory). |