“半衰期”：虚拟学习社区研究的新方法

半衰期理论是衡量科学文献老化程度的重要指标，当前对于该指标的研究已经扩展到网络信息计量学中。本文将此概念引入到虚拟学习社区对于首帖的研究中，提出首帖半衰期的概念，并选取首都师范大学虚拟学习社区网络教学平台的在线课程“网络教育应用”作为个案进行分析研究，对不同半衰期的首帖文本编码分析，并对于如何在学习论坛中发帖提出建议。

Half-life:A New Way of Research into Virtual Learning Community

Half-life theory is an important theory that can be used to measure obsolescence of scientific literature.The theory has been applied to web information metrology.In this paper,The concept of half-life is applied to the research of initial posts in a virtual learning community in a case study of the virtual online course titled "Applications of Web-based Learning" at Capital Normal University.In the study,the researchers analyze the coding method to analyze the half-life cycles of initial posts.Based on the...