Judging the Constructive Impacts of Communication Technologies: A Business Education Study

Through an IBM partnership, Acadia University has the benefit of an infrastructure that places a laptop computer in the hands of some 4000 faculty and students on campus. Coupled with anytime–anyplace campus access to the computer network, the setting offers unique opportunities to study the pedagogical impacts of the use of computers in classroom instruction.University business administration courses have routinely employed case study approaches in the delivery of some course content. The research described follows the use of an elaborate case study communications networking system being used in a business course on competitive intelligence. Though the technology collage allows for certain opportunities to promote quality instruction, not all aspects of technology use were found to be productive. This paper provides an analysis of the appropriateness of technology usage in the context of a single business education course.     

"使"字句的英译

本文通过个人搜集及检索英汉平行语料库,对“使”这一汉语中常用词的种种英译进行了调查,结果发现与其对应的英语表达法多种多样。本文以实例分析该词在英语中的各种不同表达法,对丰富我们的表达手段无疑会有裨益。     

Can Computer Use Hurt Science Achievement? The USA Results from PISA

A surprising result of the Third International Mathematics and Science Study (TIMSS) is that computer use was negatively associated with high student achievement in some countries. More specifically, the students from all three countries who indicated that they use computers in the classroom most frequently were those with the lowest achievement on the TIMSS in 1995. For the purpose of this study, a similar comparison was made for 15-year-old U.S.A. students, based on the data from the Program for International Student Assessment (PISA). The results of this study show that it is not computer use itself that has a positive or negative effect on the science achievement of students, but the way in which computers are used. For example, after controlling for the student's socioeconomic status in the United States of America, the results indicated that the students who used computers frequently at home, including for the purpose of writing papers, tended to have higher science achievement. However, the results of this study also show that science achievement was negatively related to the use of certain types of educational software. This indicates a result similar to that found in the TIMSS data, which might reflect the fact that teachers assign the use of the computer and of educational software to the lower achieving students more frequently, so that these students can obtain more personal and direct feedback through educational software.     

为课件制作降降温

由于多媒体集文字、声音、图形、图像、动画、视频于一身，静与动相结合，多媒体教学摆脱了一些机械呆板的教学形式，依赖大量的多媒体素材把以往受时间和空间限制的内容搬进了课堂，信息容量大，表现力丰富，操作方便是多媒体教学得天独厚的优势。媒体的炒作、教育行政部门的干预，在我国掀起了一股课件热。由于我国除沿海开放地区外，计算机硬件资源分布还很不平衡，大家一窝蜂地制作课件，会造成一些负面效应，笔者认为应为课件制作降降温。     

Being sloppy about slope: The effect of changing the scale

What is the slope of a(linear) function? Due to the ubiquitous use of mathematical software, this seemingly simple question is shown to lead to some subtle issues that are not usually addressed in the school curriculum. In particular, we present evidence that there exists much confusion regarding the connection between the algebraic and geometric aspects of slope, scale and angle. The confusion arises when some common but undeclared default assumptions, concerning the isomorphism between the algebraic and geometric systems, are undermined. The participants in the study were 11^th-grade students, prospective and in-service secondary mathematics teachers, mathematics educators and mathematicians — a total of 124 people. All participants responded to a simple but non-standard task, concerning the behavior of slope under a non-homogeneous change of scale. Analysis of the responses reveals two main approaches, which we have termed ‘analytic’ and ‘visual’, as well as some combinations of the two.     

数据结构上机作业的综合设计

加强上机实践 ,组织较好的上机题目 ,在数据结构的教学中起着重要作用。本文介绍了数据结构上机实践中 ,如何有效组织较综合的上机题目 ,充分调动学生的学习积极性 ,以达到较好的学习效果。     

高级家用电子产品维修智能化考核系统的研究

提出了一种基于单片机的电子产品维修训练与考核智能化系统方案 ,通过上位机和下位机构成主从结构的监控系统 ,实现对故障检修训练与考核的管理 ,包括随机设置故障、恢复故障及自动评分 .在上位机 ,能及时了解各下位机故障维修及考核的情况 ,实现了监控的实时性和灵活性 ,提高了工作效率及降低成本 .     

电脑美术教学初探

电脑是美术教学最可利用的工具之一.应用电脑美术教学不仅仅是一种新工具、新材料、新方法的引进,而且是新的观念、新的思维以及新的设计思想的转变.     

一种伸缩杆-水平滑块式并联机器人运动学及静力学计算

文章介绍了一种伸缩杆-水平滑块式三自由度并联机器人机构，根据该机构的结构建立了其运动学方程导出其雅可比矩阵，并对该机构的静力学方程进行了推导。该机器人机构运动学方程正、逆解均具有显式解；其雅可比矩阵在工作空间内不存在奇异点；具有三个平动方向的运动自由度，是一种具有实用价值的机器人机构。     

UPS的并联连接

本文介绍了一种具有并联功能的三相交流输入，三相交流输出的不间断电源并机系统，叙述了系统的结构、控制原理和控制软件，最后给出了测试结果。