Publication and citation data are used to analyse the dynamics of the theoretical highenergy physics specialty Monte Carlo methods in lattice field theory. The present study is based on a comprehensive bibliography of the given subject area for the six-year period 1979–1984 and the 1979–1985 citations to these papers. The application of a recently introduced set of scientometric indicators provides clues to undertanding the growth of a new research specialty from a core body of seminal literature.
In order to quantify the influence of publication languages on the rate of citation of scientific articles, such East German journals from the Science Citation Index database were selected which publish relevant shares of contributions in several languages, especially in English and German. For a fixed period of time (1988) the selective citation impact of both English- and German-language articles was calculated. The results of our investigation reveal a non-uniform picture: In some cases English-language papers exhibit a significantly higher citations-per-paper average than German-language articles, but in a few cases German-language publications achieve a higher mean citation rate. For the half of selected journals there does not exist a statistically significant difference of citation frequencies of publications in both languages. Possible causes of these phenomena (editorial practice of journals, native countries of authors) are considered.
In an earlier study the authors have shown that bibliographic coupling techniques can be used to identify hot research topics. The methodology is based on appropriate thresholds for both number of related documentsand the strength of bibliographic links. Those papers are calledcore documents that have more than 9 links of at least the strength 0.25 according toSalton's measure, provided they are articles, notes or reviews. This choice resulted in a selection of nearly one per cent of all papers of the above types recorded in the 1992 annual cumulation of the SCI.Core documents proved important nodes in the network of documented science communication.In the present study, the set ofcore documents is analysed by journals, subfields and corporate addresses. The latter analysis is conducted on both national and regional-institutional level. First all countries which have published at least 20 core documents in 1992 are investigated in terms of their research profiles, their international collaboration patterns and their citation impact. Finally, those eight members of the European Union which have published at least 20 core documents in 1992 are analysed in respect of regional and institutional distribution of core documents.
A serious shortcoming of bibliometric studies based on the(Social) Science (s) Citation Index is the lack of an universally applicable subject classification scheme as individual papers are concerned. Subject classification
of papers on the basis of assigning journals to subject categories (like those found in the various supplements of ISI databases)
works well in case of highly specialised journals, but fails for multidisciplinary journals such asNature, Science andPNAS—and so far as subfields are taken into consideration-also for “general” journals (e.g.JACS orAngewandte Chemie). This study presents the results of a pilot project attempting to overcome this shortcoming by delimiting the subject of
papers published in multidisciplinary and general journals by an item-by-item subject classification scheme, where assignment
is based on the analysis of the subject classification of reference literature. The results clearly confirmed the conclusions
of earlier studies by the authors in the field of reference analysis. For the really important journals (sufficiently high
number of annual publications and high impact with respect to the field), the share of classifiable papers was surprisingly
high, and the assignment proved reliable as well. Since papers in the leading general and multidisciplinary journals are frequently
citing general and multidisciplinary journals, an iterated application of the procedure is expected to increase the number
of classifiable publications.
The results of the new methodology may improve the validity of bibliometric studies for research evaluation purposes.
Scientific cooperation of the EU countries with other developed regions, with Economies in Transition and with Developing
Countries is analysed as it is reflected in the bibliometric indicators of internationally co-authored publications. The citation
attractivity of these publications shows that international scientific collaboration is particularly advantageous for less
advanced countries, but also highly industrialised countries benefit from it.
Authors:W. Glänzel, A. Schubert, U. Schoepflin, and H. Czerwon
A serious shortcoming of bibliometric studies based on theSocial Sciences Citation Index is the lack of a universally applicable subject classification scheme as individual papers are concerned. Moreover, the selective
coverage of more than thousand scientific journals per annum proved to be an insuperable obstacle in the delimitation of social
science subject areas. Subject classification of papers on the basis of assigning journals to subject categories (like those
found in the various supplements of ISI databases) works well in case of fully covered and highly specialised journals in
the social sciences, too, but fails for multidisciplinary and selectively covered journals. This study presents the results
of an item-by-item subject classification approach, where assignment is based on the analysis of the subject categories of
This analysis extends the results of an earlier study by the authors on the possibility of delimiting subfields in the hard
and life sciences based on reference analysis. The assignment proved also reliable for a considerable share of literature
in the social sciences. Due to the peculiarities of the database this share is lower in the SSCI than that in the SCI. Although
an iterated application of the procedure is expected to increase the number of classifiable publications, it is suggested
that in the sociated sciences the method should be used in combination with other means of subject assignment.