Authors:M. Angeles Zulueta, Gisela Cantos-Mateos, Benjamín Vargas-Quesada, and Carmen Sánchez
This paper shows the main lines of research concerning health and women, as registered in the Medline database, broken down into four 10-year periods: 1965–1974, 1975–1984, 1985–1994, and 1995–2005. The units of analysis used were the Medline “MeSH” major terms, processed by means of co-term analysis. For graphic representation, the social network approach was used, with pruning performed by Pathfinder Networks (PFNET), so as to concentrate the displays. Factor analysis was used to group the descriptors and identify the main lines of research involving health and women. The results show that research on Health and Women has increased and undergone significant changes over the past 40 years, yet such studies are not given due importance.
Authors:Antonio J. Gómez-Núñez, Benjamín Vargas-Quesada, Félix de Moya-Anegón, and Wolfgang Glänzel
In order to re-categorize the SCImago Journal & Country Rank (SJR) journals based on Scopus, as well as improve the SJR subject classification scheme, an iterative process built upon reference analysis of citing journals was designed. The first step entailed construction of a matrix containing citing journals and cited categories obtained through the aggregation of cited journals. Assuming that the most representative categories in each journal would be represented by the highest citation values regarding categories, the matrix vectors were reduced using a threshold to discern and discard the weakest relations. The process was refined on the basis of different parameters of a heuristic nature, including (1) the development of several tests applying different thresholds, (2) the designation of a cutoff, (3) the number of iterations to execute, and (4) a manual review operation of a certain amount of multi-categorized journals. Despite certain shortcomings related with journal classification, the method showed a solid performance in grouping journals at a level higher than categories—that is, aggregating journals into subject areas. It also enabled us to redesign the SJR classification scheme, providing for a more cohesive one that covers a good proportion of re-categorized journals.
Authors:Félix de Moya-Anegón, Zaida Chinchilla-Rodríguez, Benjamín Vargas-Quesada, Elena Corera-Álvarez, Francisco Muñoz-Fernández, Antonio González-Molina, and Victor Herrero-Solana
Our aim is to compare the coverage of the Scopus database with that of Ulrich, to determine just how homogenous it is in the
academic world. The variables taken into account were subject distribution, geographical distribution, distribution by publishers
and the language of publication. The analysis of the coverage of a product of this nature should be done in relation to an
accepted model, the optimal choice being Ulrich’s Directory, considered the international point of reference for the most
comprehensive information on journals published throughout the world. The results described here allow us to draw a profile
of Scopus in terms of its coverage by areas — geographic and thematic — and the significance of peer-review in its publications.
Both these aspects are highly pragmatic considerations for information retrieval, the evaluation of research, and the design
of policies for the use of scientific databases in scientific promotion.