Students’ experience of synchronous learning in distributed environments     

Anissa R. Stewart  Danielle B. Harlow  Kim DeBacco 《Distance Education》2011,32(3):357-381

This article reports on a two-year ethnographic study of learners participating in multi-site, graduate-level education classes. Classes sometimes met face-to-face in the same physical location; at other times part of the class met physically elsewhere. Yet all were linked through the virtual space. Ethnographic analysis of four data types explored how the instructor and students were able to interact through videoconferencing technologies. Most of the interaction occurred between the local and distance learners by way of cultural guides, local students assigned to host a distance learner through Google Video chat. The distance learners were able to receive real-time attention from the instructor and were able to share differing perspectives that contributed to increased satisfaction in the course. These interactions allowed for a dynamic collaborative effort among a diverse set of actors in the field of education.  相似文献   

A retrospective look at replacing face‐to‐face embryology instruction with online lectures in a human anatomy course          下载免费PDF全文

Elmus G. Beale  Patrick M. Tarwater  Vaughan H. Lee 《Anatomical sciences education》2014,7(3):234-241

Embryology is integrated into the Clinically Oriented Anatomy course at the Texas Tech University Health Sciences Center School of Medicine. Before 2008, the same instructor presented embryology in 13 face‐to‐face lectures distributed by organ systems throughout the course. For the 2008 and 2009 offerings of the course, a hybrid embryology instruction model with four face‐to‐face classes that supplemented online recorded lectures was used. One instructor delivered the lectures face‐to‐face in 2007 and by online videos in 2008–2009, while a second instructor provided the supplemental face‐to‐face classes in 2008–2009. The same embryology learning objectives and selected examination questions were used for each of the three years. This allowed direct comparison of learning outcomes, as measured by examination performance, for students receiving only face‐to‐face embryology instruction versus the hybrid approach. Comparison of the face‐to‐face lectures to the hybrid approach showed no difference in overall class performance on embryology questions that were used all three years. Moreover, there was no differential effect of the delivery method on the examination scores for bottom quartile students. Students completed an end‐of‐course survey to assess their opinions. They rated the two forms of delivery similarly on a six‐point Likert scale and reported that face‐to‐face lectures have the advantage of allowing them to interact with the instructor, whereas online lectures could be paused, replayed, and viewed at any time. These experiences suggest the need for well‐designed prospective studies to determine whether online lectures can be used to enhance the efficacy of embryology instruction. Anat Sci Educ 7: 234–241. © 2013 American Association of Anatomists.  相似文献   

永磁同步电机调速控制系统研究   总被引：1，自引：1，他引：0  

李兵  ;姚明林  ;冯曰臻 《唐山学院学报》2014,(3):28-31

为了改善永磁同步电机调速系统的调速性能,提高系统的鲁棒性,设计一个基于矢量控制的永磁同步电动机双闭环调速系统。运用模糊算法对PI控制器参数进行自动调节,克服了传统PI控制器鲁棒性差的缺点,使速度控制达到较为理想的性能要求。在电流环控制中,采用空间矢量脉宽调制技术替代传统的正弦脉宽调制技术,以减小奇次谐波损耗,提高电能的利用率,达到良好的电流追踪效果。通过在线测试,设计系统的各项性能指标均优于传统控制系统,能够满足现场设备的精准控制要求。  相似文献   

Physica: A Computer Environment for Physics Problem-Solving     

S.M. Ross  J.P.R. Bolton 《Interactive Learning Environments》2013,21(2):157-175

Physica is an integrated software package designed as part of a course for distance learning students from non-traditional educational backgrounds. It gives students access to an extensive hyperlinked physics glossary, computer algebra and graph-plotting tools. The package aims to give students a framework for solving physics problems and to help them acquire some higher level skills of quantitative problem-solving. This paper outlines rationales underlying various protocols for solving physics problems, and discusses the extent to which frameworks may be useful in helping students develop appropriate strategies for representing problems in formal terms, selecting targets, planning solutions and checking answers. Pedagogical issues underlying the design and implementation of the software are discussed.  相似文献   

混合动力汽车电机控制模型的仿真建立     

李敏旭  汤宁平 《福建工程学院学报》2008,6(Z1)

通过分析混合动力汽车电机控制的方法,设计永磁同步电机的直接转矩控制系统;建立相应的数学控制模型,并对相关的因素进行分析;通过具体的系统设计,获得相应的仿真结论.  相似文献   

屏幕背后：同步网络课堂教学效果影响因素研究     

李英明  叶海云  徐光涛 《教育技术导刊》2021,19(12):266-270

同步网络课堂（SCC）为边远地区学校输送了优秀的教学资源,成为近年来现代远程教育应用的一种重要形式。采用扎根理论和内容分析法,对影响较大的网络新闻和社交媒体上的49篇文章和1 236条有效评论进行系统分析,以寻找影响SCC教学效果的关键因素,并制定相应措施。结果表明,影响SCC教学有效性的关键因素包括6个主范畴及其25个子范畴,以及各因素之间存在的相互关系。最后,探索性地构建SCC教学有效性影响因素作用机制模型,并提出针对性和系统性的策略方案和实施路径,切实提升SCC教学效果。  相似文献   

Comparing face-to-face and asynchronous online communication as mechanisms for critical reflective dialogue     

Susan Salter  Tracy Douglas  David Kember 《Educational Action Research》2017,25(5):790-805

Two mechanisms for engaging in critical reflective dialogue are discussed and compared: face-to-face meetings and asynchronous online discussion. The context is an umbrella action research project, with over 20 participants, which aimed to improve practices in online teaching and contribute to the development of graduate attributes. The article compares discussion using the two modes (face-to-face and online) of the nature of and development of problem-solving and other graduate attributes. Face-to-face discussion was wide ranging and quite loosely structured, so divergent aspects of a topic were uncovered. The asynchronous nature of online discussion, however, permitted topics to be explored more thoroughly. The two modes worked well in conjunction with one another, if aspects of face-to-face discussion topics were posted online as discussion threads. The asynchronous online discussions then allowed each thread to be explored in depth, so that collective understanding of a given topic could be enhanced.  相似文献   

电梯用无齿轮永磁同步曳引机测试系统设计     

张亚刚  吴文  朱昌明 《天津工程师范学院学报》2004,14(3):29-31

由于无齿轮永磁同步曳引机具有性能优越、占用空间小的特点 ,在电梯驱动系统中的应用日趋广泛。文章论述了为生产厂家设计的一套设备专用测试系统 ,详细介绍了系统软、硬件的设计和实现方法。实际应用表明 ,该测试系统运行稳定可靠 ,操作简便 ,显著提高了测试效率 ,实现了无齿轮永磁同步电梯曳引机测试过程的自动化  相似文献   

基于LabVIEW平台的数据采集系统中模拟量和脉冲量同步问题的探讨     

孙上  蒋志鹏 《实验室研究与探索》2006,25(10):1229-1232

同步问题是为了解决船模实验中同步采集拖车速度和其它物理量(模拟信号)而提出的。本文讨论了在LabVIEW环境下所能考虑到的所有的解决方法,详细说明了这些方法的实现,就其利弊及实验中出现的问题和结果作了深入的分析,并对各种方法进行了比较。  相似文献   

关注青少年学生上网行为   总被引：1，自引：0，他引：1  

曾乃卓 《闽江学院学报》2001,21(4):66-68

文章通过对青少年学生上网行为的分析,并对需防范问题及对策的思考,探讨如何使互联网技术在融入现代人生活时能发挥积极作用,从而有利于青少年学生的健康成长。  相似文献