Measuring Search Engine Quality

The effectiveness of twenty public search engines is evaluated using TREC-inspired methods and a set of 54 queries taken from real Web search logs. The World Wide Web is taken as the test collection and a combination of crawler and text retrieval system is evaluated. The engines are compared on a range of measures derivable from binary relevance judgments of the first seven live results returned. Statistical testing reveals a significant difference between engines and high intercorrelations between measures. Surprisingly, given the dynamic nature of the Web and the time elapsed, there is also a high correlation between results of this study and a previous study by Gordon and Pathak. For nearly all engines, there is a gradual decline in precision at increasing cutoff after some initial fluctuation. Performance of the engines as a group is found to be inferior to the group of participants in the TREC-8 Large Web task, although the best engines approach the median of those systems. Shortcomings of current Web search evaluation methodology are identified and recommendations are made for future improvements. In particular, the present study and its predecessors deal with queries which are assumed to derive from a need to find a selection of documents relevant to a topic. By contrast, real Web search reflects a range of other information need types which require different judging and different measures.     

信息资源有效配置中帕累托最优理论的适用性问题

由于知识产权制度 ,信息产品成为无形财产被纳入现实经济运行体系 ,因此 ,帕累托最优可以用于信息配置效率分析 ,建立具有实证意义和规范意义的标准。参考文献 5。     

Invisible children? The need for support groups for siblings of disabled children

Previous research and first-hand experience suggest that a child with a disability can have a profound effect on family life. Although the need for sibling support has been acknowledged in legislation, the implications for non-disabled siblings remain unclear. In this article, Angie Naylor, lecturer in psychology, and Phil Prescott, senior lecturer in childhood and youth studies, both based at Edge Hill, review a number of key themes emerging from the literature on sibling support. They go on to report the findings from an in-depth study of one sibling support group. The work was carried out in partnership with Barnardo's in the north-west of England and involved setting up a sibling support group, in response to an analysis of local need, and evaluating its impact. This research indicates a clear need for further service provision to meet the needs of the siblings of disabled children who attended the scheme. Angie Naylor and Phil Prescott argue for a reinvigorated debate about the needs of such children and champion the importance of listening to children and valuing what they have to say. The results of this small-scale evaluation project have clear implications for future research and, potentially, for policy and practice.     

南京体院内部审计工作现状浅析

用献资料法和比较法对南京体院的内部审计工作研究后，发现近5年来，体院的内部审计在财务审计方面取得了一定的成绩，具有自身的特色，为学院制定制度和加强财务管理提供了有力的依据。机构的改革、审计人员素质的提高和审计领域的推广，将有利于体院内部审计发挥更大的效能。     

对中长跑运动员训练机能评定的实验研究

观察了不同训练水平男子中长跑运动员不同强度训练负荷后血清免疫球蛋白水平的变化。结果提示:大强度训练可降低男子中长跑运动员机体的体液免疫水平,其测定有助于掌握运动强度和负荷量,为合理安排训练计划提供依据。     

网络信息环境下馆藏评价标准的变革

文章以现代图书馆馆藏建设的变革为切入口，评析了传统馆藏评价标准。这些基础上重点探讨了网络信息环境下馆藏评价标准的变革。     

美国《1998数字千年版权法》有关版权保护的新规定

美国《数字版权法》对《美国法典》第 17篇“版权法”的许多条款做了技术性修订 ,例如 :对受保护的版权拥有人范围的修订 ,对WTO成员国及WCT、WPPT成员国内尚未超过版权保护期的作品给予保护 ,对图书馆等非营利性机构的特殊规定 ,对网上侵权的限制 ,等等。该法对其他国家版权保护会产生重要影响。参考文献 4。     

浙江省大学男生"体质达标"评价研究

《国家体育锻炼标准》是以对人的体能评价为主 ,未将身体形态和机能指标纳入评价体系 ,这种评价显然是不全面、不科学的。本研究对浙江省大学男生体质状况进行分析 ,为浙江省大学体育教学向以“体质达标”评价为主的转轨提供评价标准而服务 ,探索适合大学生“体质达标”综合评价的新方法。     

分型管理逐步提高--关于教师队伍建设的新思考

本文论述了如何对教师进行科学的分型管理及教学评估,来逐步提高教师的业务素质.