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首页> 外文期刊>International journal of digital library systems >Doctoral Theses in Environmental Science: An Obsolescence Study
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Doctoral Theses in Environmental Science: An Obsolescence Study

机译：环境科学博士学位论文：淘汰研究

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摘要

The result of this study is an original research work with application of Bradford's law and an obsolescence study of environmental science literature. The article represents the availability of information and information used by the researchers in the field of environmental science for their research work. The research design adopted was a descriptive study. Data was collected from 66 doctoral theses submitted to the Kuvempu University in the field of Environmental Science during 1998-2012 have been taken as the source of data for the present study; these doctoral theses generated 14,668 total citations. The study is based on the analysis of bibliographic references appended at the end of each chapter and footnotes, if any. Each thesis was manually examined and references appended at the end of each chapter were extracted. All the references were noted. Later, the data were fed into the computer using MS-Excel and separate sheets and columns were created to enter data. Finally, the data was transferred to SPSS software to generate the tables, graphs and results. The present article reveals that journals have the highest number of citations accounting to 72.25% of the total citations. The Journal of Hydrobiologia from the Netherlands occupies the first rank as the most preferred journal having been cited 546 (5.15%) times. Further, Bradford's law was applied and studied the obsolescence of journal literature. Finally half-life of journal citations was found 14 years old in the field of Environmental Science.
机译：这项研究的结果是应用布拉德福德定律进行的原始研究工作以及对环境科学文献的过时研究。本文介绍了环境科学领域的研究人员用于其研究工作的信息和信息的可用性。所采用的研究设计是描述性研究。 1998-2012年间在环境科学领域提交给Kuvempu大学的66篇博士论文的数据已被用作本研究的数据来源；这些博士论文总共被引用14,668条。该研究基于对每章末尾附上的书目参考文献的分析，如果有的话。每篇论文都经过人工检查，并在每章末尾附加了参考文献。记录了所有参考文献。之后，使用MS-Excel将数据输入计算机，并创建单独的工作表和列以输入数据。最后，将数据传输到SPSS软件以生成表格，图形和结果。本文发现期刊被引用的次数最多，占被引用总数的72.25％。荷兰的《水生生物学杂志》排名第一，是最受推荐的杂志，被引用546次（5.15％）。此外，布拉德福德定律被应用并研究了期刊文献的过时。最终，在环境科学领域中发现期刊引文的半衰期为14岁。

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