This paper sets forth a general methodology for conducting bibliometric analyses at the micro level. It combines several indicators grouped into three factors or dimensions which characterize different aspects of scientific performance. Different profiles or “classes” of scientists are described according to their research performance in each dimension. A series of results based on the findings...

The aim of this study is to make a bibliometric comparison of the performance of research astronomers in the Netherlands Research School for Astronomy (NOVA) with astronomers elsewhere. This is complementary to similar studies as undertaken by the Center for Science and Technology Studies (CWTS), but has the specific feature of using the NASA Astrophysics Data System (ADS)1 and possibilities of...

Omitted citations – i.e., missing links between a cited paper and the corresponding citing papers – are the main consequence of several bibliometric-database errors. To reduce these errors, databases may undertake two actions: (i) improving the control of the (new) papers to be indexed, i.e., limiting the introduction of “new” dirty data, and (ii) detecting and correcting errors in the papers a...

Latent Semantic Analysis (LSA) has been in use in several different fields of science. Several modeling techniques including Boolean, settheoretic, vector space, and probabilistic models studied. In this paper, we first describe the concept of “LSA” and then present the preliminary results of an exploratory study. We carried out a small-scale bibliometric analysis to find out the impact of LSA ...

The impact factor of journals has been widely used as glory quotients. Despite its limitations, this citation metric is widely used to reflect scientific merit and standing in one's field. Apart from the impact factor, other bibliometric indicators are also available but are not as popular among decision makers. These indicators are the immediacy index and cited half-life. The impact factor its...

The methods of bibliometric research of scientific periodicals are studied much better than the properties of periodicals though the latter are the subject of the assessment. Since the properties in most cases are not being evaluated directly, the problem is to identify the intermediate that is DIRECTLY evaluated by a concrete method and to determine, which specific property of a scientific per...

Percentiles have been established in bibliometrics as an important alternative to mean-based indicators for obtaining a normalized citation impact of publications. Percentiles have a number of advantages over standard bibliometric indicators used frequently: for example, their calculation is not based on the arithmetic mean which should not be used for skewed bibliometric data. This study descr...

This is a follow-up on the bibliometric evaluation of Finnish astronomy presented by the author at the LISA V conference in 2006. The data from the previous study are revisited to determine how a wider institutional base and mergers affect comparisons between research units. Bibliometrics can be an useful tool for evaluating research done in separate institutes working in the same field. The au...

Bibliometric measures are commonly used to estimate the popularity and the impact of published research. Existing bibliometric measures provide “quantitative” indicators of how good a published paper is. This does not necessarily reflect the “quality” of the work presented in the paper. For example, when hindex is computed for a researcher, all incoming citations are treated equally, ignoring t...

This study provides an historical analysis of the discipline of information retrieval for three time periods: 1980-1984, 1990-1994, and 2000-2004. This analysis is done through the use of a novel bibliometric technique called tri-occurrence analysis, in which the descriptor “information retrieval” is used as a filter term within the traditional technique of cooccurrence analysis. The resulting ...