Journal ranking by different parameter. Part I. Collectivity and selective collectivity: Two ranking parameters reflecting the structure of a journal network

In the course of the study of scientific journal's rank distributions two new parameters are defined reflecting collective properties of journals in a network where the journals are linked to each other through co-usage of user profiles for which they contain relevant papers. The first, Collectivity C is a mere structure parameter whereas Selective Collectivity N·C uses C of a journal as a weight factor for the number of hits N produced in a retrospective search in a data file. The corresponding rank distributions show besides the expected reranking effect considerable deviations from a distribution where ranking is done according to the parameter Selective Journal Productivity N.