Authors:Frizo Janssens, Wolfgang Glänzel, and Bart De Moor
Previous studies have shown that hybrid clustering methods that incorporate textual content and bibliometric information can
outperform clustering methods that use only one of these components. In this paper we apply a hybrid clustering method based
on Fisher’s inverse chisquare to integrate full-text with citations and to provide a mapping of the field of information science.
We quantitatively and qualitatively asses the added value of such an integrated analysis and we investigate whether the clustering
outcome is a better representation of the field by comparing with a text-only clustering and with another hybrid method based
on linear combination of distance matrices. Our data set consists of almost 1000 articles and notes published in the period
2002–2004 in 5 representative journals. The optimal number of clusters for the field is 5, determined by using a combination
of distance-based and stability-based methods. Term networks present the cognitive structure of the field and are complemented
by the most representative publications. Three large traditional sub-disciplines, particularly, information retrieval, bibliometrics/scientometrics,
and more social aspects, and two smaller clusters about patent analysis and webometrics, can be distinguished.
Authors:Wolfgang Glänzel, Frizo Janssens, and Bart Thijs
A novel subject-delineation strategy has been developed for the retrieval of the core literature in bioinformatics. The strategy
combines textual components with bibliometric, citation-based techniques. This bibliometrics-aided search strategy is applied
to the 1980–2004 annual volumes of the Web of Science. Retrieved literature has undergone a structural as well as quantitative
analysis. Patterns of national publication activity, citation impact and international collaboration are analysed for the
1990s and the new millennium.
Authors:Lin Zhang, Frizo Janssens, Liming Liang, and Wolfgang Glänzel
The objective of this study is to use a clustering algorithm based on journal cross-citation to validate and to improve the
journal-based subject classification schemes. The cognitive structure based on the clustering is visualized by the journal
cross-citation network and three kinds of representative journals in each cluster among the communication network have been
detected and analyzed. As an existing reference system the 15-field subject classification by Glänzel and Schubert (Scientometrics
56:55–73, <cite>2003</cite>) has been compared with the clustering structure.
Authors:Victor Rodriguez, Frizo Janssens, Koenraad Debackere, and Bart De Moor
In this paper we examine whether and to what extent material transfer agreements influence research agenda setting in biotechnology.
Research agendas are mapped through patents, articles, letters, reviews, and notes. Three groups are sampled: (1) documents
published by government and industry which used research materials received through those agreements, (2) documents published
by government and industry which used in-house materials, (3) documents published by academia. Methodologically, a co-word
analysis is performed to detect if there is a difference in underlying scientific structure between the first two groups of
documents. Secondly, interviews with practitioners of industry and government are intended to capture their opinion regarding
the impact of the signed agreements on their own research agenda choices. The existence of synchronic and diachronic common
terms between co-word clusters, stemming from the first two groups of publications, suggests cognitive linkage. Moreover,
interviewees generally do not consider themselves constrained in research agenda setting when signing agreements for receiving
research materials. Finally, after applying a co-word analysis to detect if the first group of documents overlaps with the
third group we cannot conclude that agreements signed by industry and government affect research agenda setting in academia.