Dergi Kullanım Verilerinin Bibliyometrik Analizi ve Koleksiyon Yönetiminde Kullanımı

Abstract

One of the most important functions of libraries is to develop and manage an effective collection that best meets the information needs of their users. With the introduction of electronic resources, collection development and management policies have become much more complex and interesting. Using the survey method, more than 30 million journal articles that were used at the National Academic Network and Information Center (ULAKBİM) and downloaded by the users of the consortium members (universities) from ScienceDirect, SpringerLink, Wiley InterScience and EBSCOHost databases between 2000 and 2007, were evaluated. Journal articles used were analyzed by means of bibliometric laws and the core journals were identified. The Urquhart Law “specifies that the supralibrary use of scientific and technical (sci/tech) journals is positively correlated with the number of libraries holding these journals in a system and therefore is a measure of their aggregate use within the library system, including their intralibrary use at the individual libraries of the system”. It was tested for the first time in this study for the consortial use of electronic journals. One third of articles used were satisfied by the core journals that constitute some 1.4% and 5% of all journals. Distributions of articles to journals do not conform to the Bradford and Price Laws and the 80/20 Rule. No correlation was observed between the frequencies of use of core journals and a) their impact factors; b) total number of citations they received; and c) their half-lives. There was a positive correlation between the half-lives of core journals calculated by the frequencies of use of journals and the frequencies of citations they received. Almost all the core journals that satisfied the in-house needs of ULAKBİM users and those that did the document delivery requests were common. Current articles were used more often. There is a positive correlation between the frequencies of use of journals within the ScienceDirect, SpringerLink and Wiley InterScience databases by the consortium members and ULAKBİM users. Journals that are used frequently at ULAKBİM were also used more often by the library members of the consortium. Based on eight years’ of use data of ULAKBİM and the university libraries making up the consortium, findings of this study should be used in collection development and management. Frequently used core journals should be retained while rarely used or never used journals should be excluded from the collection. Findings should be used to negotiate better consortial license agreements. The use data should be analyzed in more detail by taking into account the characteristics of universities such as their size and curricula.