This paper investigates the scatter of journals and literature obsolescence reflected in more than 137,000 document delivery requests submitted to a national document delivery service. The paper first summarizes the major findings of the study with regards to the performance of the service. It then identifies the " core " journals from which article requests were satisfied and addresses the fol...

This paper presents the results of a study in which scientists were asked about their own publications and their citation counts. The study shows that overall the citation counts of the publications correspond reasonably well with the authors’ own assessments of scientific contribution. Generally, citations proved to have the highest accuracy in identifying either major or minor contributions. ...

A new methodology is proposed for comparing Google Scholar (GS) with other citation indexes. It focuses on the coverage and citation impact of sources, indexing speed, and data quality, including the effect of duplicate citation counts. The method compares GS with Elsevier’s Scopus, and is applied to a limited set of articles published in 12 journals from six subject fields, so that its finding...

Design: Three gold standard corpora were constructed using the SSOAB bibliography, the ACPJ-cited treatment articles, and the ACPJ-cited etiology articles. Citation counts and impact factors were obtained for each article. Support vector machine models were used to classify the articles using combinations of content, impact factors, and citation counts as predictors. Measurements: Discriminator...

In this paper we present a first large-scale analysis of the relationship between Mendeley readership and citation counts with particular documents’ bibliographic characteristics. A data set of 1.3 million publications from different fields published in journals covered by the Web of Science (WoS) has been analyzed. This work reveals that document types that are often excluded from citation ana...

A statistical analysis of full text downloads of articles in Elsevier's ScienceDirect covering all disciplines reveals large differences in download frequencies, their skewness, and their correlation with Scopus-based citation counts, between disciplines, journals, and document types. Download counts tend to be two orders of magnitude higher and less skewedly distributed than citations. A mathe...