xMOOCs中的教学视频设计要点：基于案例的视频分析研究

大规模开放网络课程（MOOCs）的发展得到了国际社会的广泛关注。在主流的两类MOOCs（cMOOCs与xMOOCs）中,xMOOCs是目前发展速度最快,受众面最广的一类。而教学视频是xMOOCs最核心的课程资源。 xMOOCs中的教学视频设计应该把握哪些要点？为解决这一问题,特意分析了国内外四个主流课程平台的20门xMOOCs课程中的视频,参考《网络课程评价规范》形成视频分析框架,结合网络课程设计理论从界面设计、课程内容、教学设计三个方面对xMOOCs视频进行分析。根据视频分析结果,总结了xMOOCs教学视频在易识别性、课程说明、内容分块、学习目标、教学策略、学习者控制、内容交互性、信息呈现、练习与反馈九个方面的设计要点,并辅之以案例说明。希望对未来xMOOCs教学视频的设计有一定的参考与借鉴作用。     

Children’s recall and motivation for an environmental education video with supporting pedagogical materials

This study examined recall (Rcl) differences of high, average and low achieving fifth-grade elementary students (72) for an environmental education video with supporting pedagogical materials. In addition, it assessed the motivational level of all students. Recall assessment was carried out one-week and twenty-weeks after intervention. Main findings suggest comparative Rcl results for all achievers and high motivation for the designed video and pedagogical materials. Implications for future research and for an integrative materials’ design approach are presented.     

一种安全的文化遗产数字视频云平台研究与实现

该文研究了文化遗产数字视频云平台的安全问题,研究并实现了相应的流媒体影像网站,探索云平台上文化遗产数字视频的安全问题,在此基础上,提出了一种视频加密算法VEA,VEA密码算法用来保证云平台上文化遗产数字视频文件的安全。依托校园网环境,向校内用户提供自由视频点播服务,对古村古镇文化遗产数字视频文件较好的实现了组织、利用和管理。     

录像反馈在排球普修教学中的应用与研究

本文通过在排球教学中引入控制论中的反馈原理,利用摄录系统将学生的动作进行录像,然后进行观看分析,针对动作状态提出改进方案,再次练习、录像,再次分析,循环往复。结果证明,运用录像反馈分析与评价检验学生的动作技术,有利于加速学生的动作技术的掌握和提高,同时也激发了学生的学习兴趣,活跃了课堂气氛,全面地提高了教学效果。     

A retrospective look at replacing face‐to‐face embryology instruction with online lectures in a human anatomy course

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.     

Developing an audiovisual notebook as a self‐learning tool in histology: Perceptions of teachers and students

Videos can be used as didactic tools for self‐learning under several circumstances, including those cases in which students are responsible for the development of this resource as an audiovisual notebook. We compared students' and teachers' perceptions regarding the main features that an audiovisual notebook should include. Four questionnaires with items about information, images, text and music, and filmmaking were used to investigate students' (n = 115) and teachers' perceptions (n = 28) regarding the development of a video focused on a histological technique. The results show that both students and teachers significantly prioritize informative components, images and filmmaking more than text and music. The scores were significantly higher for teachers than for students for all four components analyzed. The highest scores were given to items related to practical and medically oriented elements, and the lowest values were given to theoretical and complementary elements. For most items, there were no differences between genders. A strong positive correlation was found between the scores given to each item by teachers and students. These results show that both students' and teachers' perceptions tend to coincide for most items, and suggest that audiovisual notebooks developed by students would emphasize the same items as those perceived by teachers to be the most relevant. Further, these findings suggest that the use of video as an audiovisual learning notebook would not only preserve the curricular objectives but would also offer the advantages of self‐learning processes. Anat Sci Educ 7: 209–218. © 2013 American Association of Anatomists.     

计算机机房视频监控系统建设

计算机机房承担着教学和试验等功能。随着信息技术和视频设备的发展,计算机机房的管理也应该从单一的点式管理发展到网络化、信息化的集约管理上来。我们应当建立由视频终端、传输、控制、显示、记录登记5大部分组成的计算机机房视频实时监控系统,以有效提高机房管理的质量和效率。     

高校图书馆入馆教育视频的实现与探索

介绍采用视频方式对学生开展高校图书馆入馆教育的方法。对入馆教育视频的策划、内容设计、制作、发布、优化等具体实施过程及方法进行了详细论述,并针对采用视频方式开展图书馆入馆教育的相关问题进行探讨,以便更好地对学生开展入馆教育。     

面向艺术教育的移动视频资源平台设计与实现

虽然近年来我国普通高校艺术教育取得了可喜成绩,但仍存在教育教学资源不足、课时少、师资及课堂容量有限等诸多问题,该文将视频电话技术应用于普通高校艺术教育领域,通过艺术教育教学视频资源库构建、面向视频电话的视频压缩、SIP协议与3G-324M协议的互通等一系列相关研究,实现信息技术和艺术教育的整合,使得学生可在校园网内通过移动终端获取艺术教育教学视频资源,随时随地学习和复习艺术教育知识,从而满足个性化、多样化的艺术教育需求。     

多视点视频编码预测结构的研究

不同的多视点视频序列具有不同的时空相关性,MVC采用的分层B帧预测结构无法充分利用视频序列的属性。本文提出了一种能适应不同视频序列编码的方法,通过研究多视点视频图像中的时空相关性和视点间的相关性,适当地取消部分时间层的视点间预测并且对所有P视点的非关键帧均采用视点间预测和调整了I视点的位置。实验结果表明,本文方法在提高编码效率的同时使得预测结构具有更好的随机访问性能、更低的编码复杂度。