The paper investigates the online citation analysis possibilities and limitations. The following online processing tools: RANK, MAP, and TARGET, provided by Dialog, are incorporated in order to perform analyses of citations to and from isolated sets of documents as well as to carry out diachrone journal analyses. These, analyses imply further to determine journal impact factors of ISI journals. Measures of the scope of internationalisation of journals are proposed and demonstrated. By the combined application of the RANK and TARGET commands we demonstrate a hitherto overlooked possibility of working with bibliographic coupling online and mapping of scientific fields.
Authors:F. Hjortgaard Christensen, P. Ingwersen, and Irene Wormell
The article describes the method for the online determination of the journal impact factor (JIF). The method is very simple
and can be used both for the ISI defined journal impact factor and for the calculation of other generalised journal impact
factors. But the direct online method fails for non-ISI journals i.e. journals not indexed by ISI to the three citation databases.
For such journals only the “External Cited Impact Factor” associated with citations from ISI journals (ECIFisi) can be determined
online by the common method. As an extra benefit the online method makes available the determination of the geographical distribution
of citations and citable units in relation to any given JIF, i.e. the international impact for a particular journal in a given
year. The method is illustrated by calculating the generalised JIF, self-citations and ECIF(isi) as well as the international
impact for Journal of Documentation and Scientometrics.