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The h-index, introduced by Hirsch, is based on the mutual variation between the number of cited and source items. The temporally continuous nature of the citation accretion process causes a shift of cited items from the h-core zone to the adjacent citation-asymmetric zones, viz. h-excess zone, or h-tail zone. The name given to this shifting phenomenon is the Diffusion of Cited Items (DCI). In this paper, two new variables are introduced, i.e., the Fold of Excess citation over Total citations (FET), denoted by ε 2 and the Fold of h-core citation over Excess citations (FHE), denoted by θ 2 . On the basis of θ and ε, another indicator is introduced, i.e., the Citation Swing Factor (CSF), defined as , which indicates the differential coefficient of θ with respect to ε. The time dependence of FET and FHE is also discussed. The possible solutions of are derived here. The functionality of CSF ( ) to measure the diffusion process quantitatively will be tested later on for journals, authors and institutions.

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The scientific field of virology mainly focuses on the study of biological viruses. Practically the field is very much associated with virus-caused diseases of living organisms. During the journey of progress, starting from the use of the phrase “contagium vivum fluidum” in the last decade of the 19th century to the modern-day well-recognized discipline of “virology”, it has grown rapidly with a large number of applied researches and interdisciplinary activities. This paper attempts to identify the disciplines with which it is interlinked. Objects’ captions of thirty top-cited research articles were analyzed linguistically to achieve the purpose. Finally, the study identifies 10 core disciplines, 12 allied disciplines, and 27 alien disciplines with which it is interlinked.