• Journal of Information Management
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• v.24 no.4
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• pp.24-42
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• 1993

This study examines the obsolescence of library and information science literature published in Korea, analysing citations appeared in major periodicals of 1992. Periodicals, languages, and forms of cited literatures are analyzed to find the half-life and the annual aging factors of Korean library and information science literature and then synthesized.

• Journal of Korean Library and Information Science Society
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• v.39 no.4
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• pp.377-395
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• 2008

This article aims to help decide until when a library has to hold journal volumes for user efficiency by measuring the value of academic journals to find the frequency of journal use over the elapsed time based on the half-life index-number of literature obsolescence by Burton & Kebler. Four general subjects categories in science was analyzed. (4 detailed subjects in mathematics, 12 in physics, 12 in chemistry, 14 in technology was selected.) As a result, citation ages are $20{\sim}29$ years in mathematics, $8{\sim}11$ in physics, chemistry, and technology. Average half-life indexes are 11.22 year in mathematics, 7.5 in physics, 8.4 in chemistry, and 8.88 in technology.