Web2.0信息半衰期影响因素实证研究——以社会书签网站为例  

Empirical Study of Impact Factors of Web2.0 Information Half Life

作　　者：马费成[1] 高静[1] 

机构地区：[1]武汉大学信息资源研究中心,湖北武汉430072

出　　处：《情报理论与实践》2010年第11期1-6,共6页Information Studies:Theory & Application

基　　金：国家自然科学基金项目"基于Web2.0的信息自组织和有序化研究"的成果之一;项目编号:70773086

摘　　要：Web2.0信息半衰期测度和影响因素研究是网络信息老化研究的重要内容之一。本文在对国内外网络信息老化研究回顾的基础上,提出Web2.0信息半衰期与网络资源自身属性、网络资源的权威性、受关注度、资源主题领域、更新速度、资源多媒体类型等因素有关。同时本文以美味书签网站为例进行实证研究,得出书签信息的半衰期是557天;五大类域名半衰期长短排序为.com<.net<.gov<.org<.edu;网页深度增加,半衰期减少;导航型网页比内容型网页半衰期长;半衰期与总收藏数符合幂函数分布。最后指出本项研究的局限性及需要进一步研究的问题。Research on Web2.0 information half life measurement and its impact factors is one of the important aspects of Internet information ageing research.Based on the review of the research on Internet information ageing at home and abroad,this paper points out that Web2.0 information half life is related with the following factors： Internet resources＇ own attribute,Internet resources＇ authority,popularity,subject area and updating rate,and multimedia types ofresources.Then,taking the Website delicious,com for example,the paper makes an empirical study and comes to the following conclusions： the half life of bookmarks on delicious,com is 557 days;the half life of 5 top-level domains in length order is.com .net .gov .org .edu;the half life decreases with the increase of Webpage depth;the navigation Webpage has a longer half life than the content Webpage;and the half life and the total collection number are in line with the power function distribution.Finally,the paper points out the limitations of the research and the problems which need to be further studied.

关 键 词：半衰期 影响因素 实证研究 书签 网站 

分 类 号：G350[文化科学—情报学]