The modified SNIP indicator of Elsevier, as recently explained by Waltman et al. SNIP value was obtained by dividing an arithmetic average in the numerator by a median value in the denominator which results in a quotient without the possibility of specifying the statistical uncertainty in the indicator. Instead of dividing aggregates, one should normalize observed against expected values in ter...

As research becomes an ever more globalized activity, there is growing interest in national and international comparisons of standards and quality in different countries and regions. A sign for this trend is the increasing interest in rankings of universities according to their research performance, both inside but also outside the scientific environment. New methods presented in this paper, en...

A system of four research levels, designed to classify scientific journals from most applied to most basic, was introduced by Francis Narin and colleagues in the 1970s. Research levels have been used since that time to characterize research at institutional and departmental levels. Currently, less than half of all articles published are in journals that been classified by research level. There ...

Counts of citations to academic articles are widely used as indicators of their scholarly impact. In addition, alternative indicators derived from social websites have been proposed to cover some of the shortcomings of citation counts. The most promising such indicator is counts of readers of an article in the social reference sharing site Mendeley. Although Mendeley reader counts tend to corre...

This study assessed characteristics of publishers who published 2010 open access (OA) journals indexed in Scopus. Publishers were categorized into six types; professional, society, university, scholar/researcher, government, and other organizations. Type of publisher was broken down by number of journals/articles published in 2010, funding model, location, discipline and whether the journal was...

Mike Thelwall, University of Wolverhampton, UK. Purpose –Mendeley reader counts have been proposed as early indicators for the impact of academic publications. In response, this article assesses whether there are enough Mendeley readers for research evaluation purposes during the month when an article is first published. Design/methodology/approach – Average Mendeley reader counts were compared...

The paper presents the results of bibliometric analysis of publications co-written by authors affiliated with Ukrainian and Russian institutions in 2007—2016, based on Scopus data. The survey results have shown that Ukrainian and Russian researchers continue carrying out joint research in major international projects. However, a decrease in the number of works published by Ukrainian and Russian...

Recent studies have shown that the Scopus bibliometric database is probably less accurate than one thinks. As a further evidence of this fact, this paper presents a structured collection of several weird typologies of database errors, which can therefore be classified as horrors. Some of them concern the incorrect indexing of so-called Online-First paper, duplicate publications, and the missing...

Introduction Scopus has been one of the main abstract and citation databases introduced by Elsevier in 2004 to the scientific area. With the multidisciplinarity and international coverage aspects, it is one of the largest databases of peer-reviewed literature in the fields of science, technology, medicine, social sciences, arts, and humanities. There have been several literature studies assessi...