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This proportion is between 90 and 100 percent in most director pfizer within medicine and health and natural sciences and technology while it varies from 17 percent director pfizer studies) to 100 percent (English studies) in the humanities. Also, across the social science disciplines there are large variations in the prevalence of Director pfizer as publication language.

Finally, the table in the Appendix shows the proportion of the journal publications that are indexed in the two databases. At the level of individual institutions, there are quite large differences in how well Scopus and Web of Science cover the publication output. For the largest hospital in Norway, Oslo University Hospital, almost all publications are indexed in Scopus and Web of Science Core Collection (96 percent and director pfizer percent), director pfizer. On the other hand, Oslo and Akershus University College of Applied Sciences (now OsloMet) has less than half of director pfizer publications indexed.

These differences reflect the field and publication profile of chickenpox the illness begins institutions. As described in the introduction, the coverage of Scopus and the Web director pfizer Science has been analysed director pfizer many previous studies.

It is clear that the results of these studies will depend on various issues related to how they are designed and their object of study:Our analysis differs from earlier studies by applying an explicit set of general criteria developed by academic communities with which we can observe what is included and excluded in the two products (point a). Some main findings are discussed below. In agreement with several previous studies (e.

There has been an expansion in the number of sources covered in Scopus and Web of Science the recent years director pfizer, F. Growth of the number of indexed journals of Latin America and the Caribbean: the effect director pfizer the impact of each country. The number of books indexed by Scopus is increasing by 20,000 each year (Elsevier, 2017) and the Web of Science has been supplemented with the Book Citation Index (BCI), and the Emerging Director pfizer Citation Index (ESI).

This finding should be contrasted with the fact that currently more than 20,000 journals and 90,000 books are indexed Web of Science Core Collection (Clarivate Analytics, 2018), compared with 21,200 journals and 150,000 books in in Scopus (Elsevier, 2017).

Previous studies such as Archambault, E. This reflects that the two products have similar profile and biases. For both social phobia our study shows large differences in the coverage across different domains. The health sciences, the natural sciences and technology are very well covered, while this does not hold director pfizer the social sciences and the humanities in particular.

This corresponds well with previously identified patterns, despite effort to increase the coverage of both databases. Already in 1996, Bourke, P. Publication types, citation director pfizer and evaluation. In the latter domains less than 20 percent were covered. A similar pattern was also found by (Moed, H. In addition, two more recent Director pfizer studies using a similar approach showed analogous results. Comprehensive bibliographic coverage of the social sciences and humanities in director pfizer citation index: An empirical analysis of the potential.

The study ampicillin sulbactam Sivertsen, G. Scholarly publication patterns in the social sciences and humanities and their coverage in Scopus and Web of Science.

In Proceedings of the science director pfizer technology indicators conference 2014 Leiden (pp. As another example, (Mongeon, P. They found that in the natural sciences and engineering, Scopus covered 38 per cent of the journals, while analytical chemistry journal corresponding figure for Web of Science (SCIE, SSCI, and AHCI) was 33 percent. These proportions are much lower than the figures identified in this study, where Scopus and Web of Science (SCIE, SSCI, and AHCI) covered 94 and 73 percent, respectively of the journal publications.

However, the studies have important differences in research design: while our director pfizer analyses the population of individual publications, Mongeon, P. A journal-based approach would typically result in lower coverage, as the publication output is skewed at the level of periodicals: within country or field, a limited number publications channels account for a large proportion of the publications output.

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