Modelling the effect of pupil mobility on school differences in educational achievement

Summary.  The recently introduced national pupil database in England allows the tracking of every child through the compulsory phases of the state education system. The data from key stage 2 for three local education authorities are studied, following cohorts of pupils through their schooling. The mobility of pupils among schools is studied in detail by using multiple-membership multilevel models that include prior achievement and other predictors and the results are compared with traditional 'value-added' approaches that ignore pupil mobility. The analysis also includes a cross-classification of junior and infant schools attended. The results suggest that some existing conclusions about schooling effects may need to be revised.     

Online interval scheduling: randomized and multiprocessor cases

We consider the problem of scheduling a set of equal-length intervals arriving online, where each interval is associated with a weight and the objective is to maximize the total weight of completed intervals. An optimal 4-competitive algorithm has long been known in the deterministic case, but the randomized case remains open. We give the first randomized algorithm for this problem, achieving a competitive ratio of 3.5822. We also prove a randomized lower bound of 4/3, which is an improvement over the previous 5/4 result. Then we show that the techniques can be carried to the deterministic multiprocessor case, giving a 3.5822-competitive 2-processor algorithm, and a 4/3 lower bound for any number of processors. We also give a lower bound of 2 for the case of two processors. A preliminary version of this paper appeared in the Proceedings of COCOON 2007, LNCS, vol. 4598, pp. 176–186. The work described in this paper was fully supported by a grant from City University of Hong Kong (SRG 7001969), and NSFC Grant No. 70525004 and 70702030.     

基于内容的唐卡图像数据库检索系统

为了解决藏族唐卡数据库分类检索问题，根据唐卡图像的特点，提出了基于块划分的结合小波帧包分解、匹配对与累计直方图为一体的新方法．该方法有效地结合了颜色、纹理、空间信息等视觉特征，实现了基于内容的唐卡图像检索。并且在查准率和查全率上都取得了好的效果．     

日本木简资料的检索方法

至今为止,日本出土了几十万件七八世纪的木简。然而,就中日学术交流的现状而言,这些木简并未得到充分的利用。木简为汉字资料,如果仅局限于日本单方面研究,许多争论都不能得到有效的解决。为了便于中国学者有效研究并利用日本木简,本文将介绍一些高效实用的查找木简资料的方法。希望中国学者参与,解决相关争议问题,深化中日学术交流。     

《中国近现代史纲要》课试题库建设十大关系研究

由于＂试题库模式＂具有成本低、见效快、易操作等优势,因此,正在成为承载和推动＂中国近现代史纲要＂考试制度改革的重要和有效形式。但是,因为考试连接着学校与社会、教学与管理、教师与学生、教学与反馈等环节,因此,在＂纲要＂课试题库建设中,必须从课程性质和特色出发,以系统论的思维,揭示、把握和体现考试与社会需要、国家需要、教育需要、学生需要和人的需要之间的内在节律。实践证明,理顺这其中的十大关系,是考试制度改革的前提和动力。     

Theory of change models deepen online learning evaluation

Massive Open Online Courses (MOOCs) have gained traction as resources for professional development. This article presents the method that we used to evaluate a professional development MOOC for postdoctoral trainees that was created by a university consortium in the US. Most approaches to evaluating MOOCs focus on analysis of participation, outcomes from course assignments, self-reported learning outcomes, course completion and user pathways through the online content or clickstream data. Few published evaluations describe in detail how learning happens within online courses and the anticipated medium and longer term cognitive and behavioral outcomes on participants. This work aims to guide those who are designing, implementing and evaluating MOOCs through applying theories of change to focus evaluation on the process of learning. This approach can be used as a complement to traditional approaches for evaluating MOOCs. We described how we worked with the MOOC team building the content to develop a theory of change for each module (or lesson) within the MOOC and used the theory of change to guide evaluation of short and medium term participant cognitive, affective and attitudinal, and behavioral outcomes. Finally, we share lessons learned and suggestions for implementing theories of change in both the design and evaluation phases of MOOC development.     

An Annotated Bibliography

This annotated bibliography on undergraduate research presents seventeen publications from serials in the library literature covering 1980 to June 2006. These publications are significant contributions from prominent authors that converge at a growing body of library literature on undergraduate research. With a focus on research behaviors, the annotated bibliography has four dimensions: a theoretical framework, main findings of undergraduate research behaviors, relations between faculty and undergraduate research, and a flip side of undergraduate behaviors. Hopefully, this annotated bibliography will familiarize readers with attitudes towards and practices in undergraduate research and a continuation of the research in untouched aspects.     

机车电线路检测仪的数据库设计与实现

机车电线路检测仪是一种专用的智能化仪器,本文介绍了智能化仪器内部数据库设计的一般方法及此数据库系统在机车电线路检测仪中的应用.     

构建黑龙江少数民族文化文献数据库的思考

数据库的构建,是计算机、通讯、多媒体、存贮技术的发展和应用。少数民族文化是黑龙江各少数民族世代智慧的结晶,传播与弘扬少数民族文化,在促进地方经济、文化建设中有着举足轻重的作用。本文论述了建设黑龙江少数民族文化文献数据库的条件、意义、方法及流程,同时提出了目前建库中存在的问题。