用WinHex分析FAT32 的磁盘存储结构

在硬盘修复、数据恢复和教学实验中,需要研究文件系统的磁盘存储结构,WinHex是能满足这一需求的较好软件,作者显示了用WinHex来分析FAT32文件系统的方法。     

Transitioning to learning outcomes at the coalface: An academic’s quantitative evaluation at the course level

Implementation of learning outcomes in Universities has not been seamless – their alignment with assessments requires faculty to specify learning outcomes and show transparent evaluation of this alignment. Difficulties arise transitioning from grading within a range of pre-existing assessment formats to grading common learning outcomes across those different formats. Experiencing this, we performed a quantitative evaluation of students completing an academic literacy course. We aimed to see if student achievement was determined by assessment format or by learning outcomes, and then to identify whether achievement of a learning outcome was equivalent across assessment formats. A twostep cluster analysis identified three clusters of students: high, medium, and low achievers. Strongest predictors of cluster-membership were learning outcomes assessed in the written essay, however scores for each learning outcome when assessed across assessment formats correlated poorly. Faculty should ensure consistent standards in learning outcomes achievement when assessed across different formats, or clearly separate learning outcomes.     

Students’ images and their understanding of definitions of the limit of a sequence

There are many studies on the role of images in understanding the concept of limit. However, relatively few studies have been conducted on how students’ understanding of the rigorous definition of limit is influenced by the images of limit that the students have constructed through their previous learning. This study explored how calculus students’ images of the limit of a sequence influence their understanding of definitions of the limit of a sequence. In a series of task-based interviews, students evaluated the propriety of statements describing the convergence of sequences through a specially designed hands-on activity, called the ɛ–strip activity. This paper illustrates how these students’ understanding of definitions of the limit of a sequence was influenced by their images of limits as asymptotes, cluster points, or true limit points. The implications of this study for teaching and learning the concept of limit, as well as on research in mathematics education, are also discussed.     

Cluster parallel rendering based on encoded mesh

INTRODUCTION Three dimensional (3D) meshes are widely used to represent 3D objects. With the rapid advances in digital acquisition technology, meshes with millions of vertices are becoming increasingly common. Be- cause of memory constraints and lack of graphics power, visualizations of this magnitude are difficult or impossible to perform even on the most powerful workstations. Therefore, the need for parallel im- plementation is clear. Most previous work in high performance rendering h…     

Power Analyses for Moderator Effects in Three-Level Cluster Randomized Trials

Researchers are often interested in whether the effects of an intervention differ conditional on individual- or group-moderator variables such as children's characteristics (e.g., gender), teacher's background (e.g., years of teaching), and school's characteristics (e.g., urbanity); that is, the researchers seek to examine for whom and under what circumstances an intervention works. Furthermore, the researchers are interested in understanding and interpreting variability in treatment effects through moderation analysis as an approach to exploring the sources of the treatment effect variability. This study develops formulas for power analyses to detect the moderator effects in designing three-level cluster randomized trials (CRTs). We develop the statistical formulas for calculating statistical power, minimum detectable effect size difference, and 95% confidence intervals for cluster or cross-level moderation, nonrandomly varying or random slopes, binary or continuous moderators, and designs with or without covariates. We demonstrate how the calculations can be used in the planning phase of three-level CRTs using the software PowerUp!-Moderator.     

湖北省各地区发展水平综合评价

本文运用主成分分析法，对湖北省17个市区的经济发展情况做出综合评价，分析了各市区在湖北省的经济地位，并利用聚类分析的方法来评价各市区经济地位等级。     

从集群品牌与企业品牌的角度提升产业集群竞争力

集群品牌是随着产业集群的形成与发展而逐渐凸现出来的,虽然集群品牌在产业集群的发展过程中作用显著,但它本身也有着与生俱来的缺陷。假使对它维护不当,就很有可能会影响到整个产业集群的发展。要提高产业集群的竞争力,应在充分维护与利用集群品牌的同时,让产业集群诞生一批具有个性化品牌的企业,这也是产业集群向高级阶段演化的必经之路。     

浅谈主机的集群技术

主机集群通过功能整合和故障过渡技术实现系统的高可用性和高可靠性。使用SAN集群，有更多的主机可以共享SAN的存储资源。LVS集群有利于实现IP负载均衡技术。主机使用集群技术，通过周密计划和网络维护，主机将相当稳定。     

有机分子和NH3团簇的研究进展

本文综述了有机分子和NH3氢键团簇体系在实验上和理论上的有关研究现状，并对其进展进行了展望。     

高校网上录取群集系统网络数据安全防护

本文论述了浙江省考试院录取群集服务器系统的网络安全防范方案,提出招生录取期间网络数据安全防护可以采取三级防护机制,即网络通道级防护、应用服务器级防护、数据库级防护。