年幼儿童的视频学习:研究与展望     

郭力平  朱文佳  郝俊  张苏颖 《幼儿教育》2011,(12)

视频资源已成为当代儿童生活中不可或缺的组成部分。研究表明,尽管年幼儿童通过视频进行了学习,但在年幼儿童,尤其是3岁前儿童的认知发展过程中,视频学习的作用可能并不明显。因此,理解年幼儿童视频学习的视角应当从对认知发展的关注转换到对社会性发展的关注上来,在年幼儿童社会化的过程中理解视频学习,揭示视频学习的社会性本质。视频资源不应是单纯的知识载体,而应当成为儿童的社会伙伴。考察视频环境中年幼儿童的学习,应在儿童、他人和视频构成的互动系统中,关注人际互动与人机互动的动态协调。强调视频学习的社会性本质,可以为年幼儿童学习理论的建设带来新思路,也可以为视频资源的教育应用及相关政策的制定提供依据,为视频节目的设计与制作带来新的启示。  相似文献   

基于录像分析背景下的代数课堂教学语言研究——以两堂《分式的乘除》课堂实录为例     

叶立军  斯海霞 《数学教育学报》2011,(1):42-44

量化分析《分式的乘除》两堂录像课,参考弗兰德提出的"Flanders互动分析系统"师生语言分类,将代数课堂教学语言进行分类,并就不同教学环节,对教学语言比较分析,得出以下结论:(1)课堂教学中,教师的教学语言所用时间占有很高的比例,各种类型的教学语言的时间比例不同,以提问性语言为主;(2)代数课堂教学中两位教师在各个教学环节中教学语言所占时间比例不同,例题讲解、练习讲解环节教师语言所占的比例最大;(3)代数课堂教学各个环节中,教师大多采用提问性为主的教学语言;(4)课堂教学中,应适当减少命令性语言和提问性语言,适当增加启发性语言、反馈性语言和激励性语言,以提高教学效果.  相似文献   

Video diaries: a tool to investigate sustainability-related learning in threshold spaces     

Jane Roberts 《Environmental Education Research》2011,17(5):675-688

This paper takes as a case study an undergraduate field class from a UK university to rural Uganda. It describes and evaluates the use of video diaries as a tool for investigating the process of transformative learning in the context of education for sustainability. The applicability of threshold concept theory to this learning is investigated. Results show the video diary technique to be much more successful in capturing the development of student learning than written diaries. Despite some practical difficulties, rich data were generated. Analysis demonstrated that learning met three of the five criteria for threshold concepts: the learning was transformative, integrative and troublesome. Further research could test whether the learning in this case study met the threshold concept criterion of irreversibility. Further elaboration of the theoretical relationship between threshold concepts, transformative learning and education for sustainability is also needed. It is concluded that the video diary method is potentially transferable to other educational research contexts and may be particularly suitable for researching learning in threshold spaces.  相似文献   

3DV quality model based depth maps for view synthesis in FTV system     

张秋闻  安平  张艳  张兆杨  王元庆 《上海大学学报(英文版)》2011,15(4):335-341

Depth maps are used for synthesis virtual view in free-viewpoint television (FTV) systems.When depth maps are derived using existing depth estimation methods,the depth distortions will cause undesirable artifacts in the synthesized views.To solve this problem,a 3D video quality model base depth maps (D-3DV) for virtual view synthesis and depth map coding in the FTV applications is proposed.First,the relationships between distortions in coded depth map and rendered view are derived.Then,a precisely 3DV quali...  相似文献   

Video retargeting using optimized crop-and-scale     

薛银珠  杜欢  刘志  张兆杨 《上海大学学报(英文版)》2011,15(4):331-334

Mobile devices are increasingly powerful in multimedia transmitting and browsing. However, the small screen and different aspect ratios of mobile devices lower visual quality while watching images or videos. Video retargeting is aim at fitting an existing video into arbitrary size and aspect ratio. Previous content-aware retargeting methods are mostly high computational cost, which limits their applications on the portable devices with low computation ability. In this paper, a new crop-and-scale approach is presented to adapt video to better suit the target display. We automatically find the optimal parameters of cropping window using the dynamic programming method, and then scale it to fit the target display. The cropping window can smoothly shift during a shot to follow the movement of important objects. The retargeting results using our approach introduce no deformation and jitter effects over the whole video. Experimental results show the success of our approach on adapting a variety of source videos to small display sizes.  相似文献   

高校教师课堂教学能力的缺失与建构     

宋春燕 《韩山师范学院学报》2011,32(1):104-108

课堂教学能力是教师能力结构的核心.当前高校教师由于课堂教学能力的缺失而影响了课堂教学的质量.建构课堂教学能力,包括提高课堂教学的设计能力、加强对课堂教学主体的研究与监控能力、提升课堂教学的组织能力、构建适当的课堂教学评价能力,以此改进课堂教学的质量,改善课堂教学的效果.  相似文献   

民国时期老子研究风貌管窥--《老子哲学之研究》阅读札记     

王婷 《广西职业技术学院学报》2020,(1):55-59

在民国时期,伴随着中国现代化的进程,西方近现代学术开始大量传入中国,并为中国学术界所接受。随着"哲学"一词及其观念的传入,"老子哲学"研究一词开始频繁出现在民国时期老子研究的各类文章和书籍中,一个不同于封建时代的老子研究范式逐步被确立起来,其中许多观念一直延续至今。从金声这本名不见经传的小册子中,我们能够感受到中西思想强烈撞击的时代背景下老子研究的风貌。  相似文献   

Language use in kindergarten science lessons: language production and academic language during a video feedback coaching intervention in kindergarten science lessons     

Astrid Menninga  Marijn van Dijk  Annemie Wetzels  Henderien Steenbeek  Paul van Geert 《Educational Research and Evaluation》2017,23(1-2):26-51

This paper aims to gain insight into language production and academic language of 4- and 5-year-old students and their teachers in the course of a teacher intervention during kindergarten science education. The study is based on videotaped classroom observations, and specifically focuses on the academic language use of students (N_intervention = 18, N_controls = 26) and teachers (N_intervention = 5, N_controls = 5). The results suggest that this general teacher intervention yields interesting changes in language use and production. Patterns of change over time confirm the idiosyncratic and non-linear nature of these changes. Science lessons represent an appropriate context in which to acquaint students with academic language, which can be used as a basis to build upon more sophisticated language skills.  相似文献   

网络体育直播的受众互动研究——以腾讯体育NBA频道为例     

张道升  陈子缘 《滁州学院学报》2019,(3):63-65,68

本文在深入剖析腾讯网NBA直播的方式与策略的基础上,提出了目前腾讯直播中存在的创新不够、直播人员专业性有待提高以及对用户服务力度不足等三个方面的问题。然后提出了腾讯体育NBA视频直播未来的发展方向:以互动性创新带动发展、提高直播人员专业性水平、优化用户的观赛体验等。最终以提高腾讯体育直播的受众互动性,从而提高腾讯体育直播在互联网时代多平台竞争下的竞争力,助力于网络视频体育直播的发展。  相似文献   

嵌入式系统及其发展前景     

张春平  戴青云 《石家庄职业技术学院学报》2006,18(4):19-20

嵌入式计算机是随着微处理器的应用而快速发展起来的,嵌入式系统是嵌入到对象体中的专用计算机系统.与普通计算机相比,嵌入式系统具有自己的特点和优势.以嵌入式计算机为核心的嵌入式系统是继IT网络技术之后,又一个新的技术发展方向.嵌入式系统使得嵌入式技术成为后PC时代的主宰.  相似文献