双向视频教学系统相关技术指标探讨

双向视频教学系统是开展现代远程开放教育的一种重要技术手段，本在云南电大建设双向视频教学系统的实践基础上，探讨系统建设过程中经常遇到的一些重要技术指标、常见问题及对策。     

病理生理学教学中翻转课堂模式的应用探究

为了探究翻转课堂教学模式在病理生理学教学中的有效性和适用性,我们于2018年3月至5月采用方便抽样法选取遵义医学院2016级本科临床医学专业4个教学班级的学生作为研究对象。对照组采用传统讲授形式的教学方法进行病理生理学理论教学,试验组采用翻转课堂模式,并分为课前短视频、课中互动讨论、课后案例分析三组。结果显示翻转课堂模式组学生考试成绩显著优于传统教学组,同时选择课前短视频教学的翻转课堂模式的考试成绩与知识点掌握情况组显著优于其他两种翻转课堂教学模式。     

同步讯问录音录像资料的法律属性分析

讯问录音录像在讯问的密室中扮演着“第三只眼睛”,在一定程度上起到遏制刑讯逼供的作用,但是由于相关法律未将录音录像的证据属性予以明确,导致司法机关在实践中对该资料的处理方式也不统一;学界亦未形成一致观点。其实判断刑事诉讼中形成的材料是否可以作为证据使用,应当审查该材料是否具有证据的“三性”,即客观性、关联性、合法性。因此,在具体案件中,应当采用具体问题具体分析的方法,准确判断讯问录音录像材料的法律属性。     

Systematic lossy error protection based on H.264/AVC redundant slices and flexible macroblock ordering

INTRODUCTION In typical video transmission systems, a video signal is compressed, and the resulting bit stream is transmitted over an error-prone channel. The errors may consist of symbol errors caused by fading, as observed for wireless channels, or packet erasures caused by congestion, as observed in the Internet. If a received video packet contains errors, then the portion of the video signal contained in the packet is lost and must be concealed. Error concealment schemes alone cannot …     

微视频在医学实验动物学教学中的应用优势

在医学院校,学生实验技能培养越来越受到重视。《医学实验动物学》是医药生命科学研究的重要学科,顺应医学院校人才培养战略,培养实用型人才,改革教学模式,文章探讨微视频在《医学实验动物学》中应用的教学优势。     

监控系统中视频信号的双绞线传输

双绞线可以长距离传输视频信号,并可以有效的避免工业现场中的各种干扰。基本原理是在发射端将非平衡的视频信号转换为平衡的视频信号,在接收端将平衡的视频信号还原为非平衡的视频信号与显示器连接。关键是发射器与接受器的设计与制作,传输过程中对高频信号的补偿和预提升。     

巧妙解决PowerPoint课件制作中的难题

介绍了课件制作中解决配音、菜单控制、插入视频、插入Flash动画难题的巧妙方法。     

远程教学技术模式及其应用探析

运用Web、电视以及视频会议等技术开展的远程教学活动各自具有不同的特点，根据不同的教学需要，合理地应用相应的技术构成综合的技术模式，在开展远程教学的时候能达到较好的效果。     

基于IP的软件视频会议系统在教育城域网上的设计与实现

为了适应中小学教育信息化发展的需求,提出了在开放式教育城域网平台上,架构基于IP的软件视频会议系统的设计目标,分别论述了网络平台、协议选择、会议安全、音视频质量保障等实现方法,并成功实现了一个多点双向式的纯软件视频会议系统。     

Analysis of swimming performance: perceptions and practices of US-based swimming coaches

In elite swimming, a broad range of methods are used to assess performance, inform coaching practices and monitor athletic progression. The aim of this paper was to examine the performance analysis practices of swimming coaches and to explore the reasons behind the decisions that coaches take when analysing performance. Survey data were analysed from 298 Level 3 competitive swimming coaches (245 male, 53 female) based in the United States. Results were compiled to provide a generalised picture of practices and perceptions and to examine key emerging themes. It was found that a disparity exists between the importance swim coaches place on biomechanical analysis of swimming performance and the types of analyses that are actually conducted. Video-based methods are most frequently employed, with over 70% of coaches using these methods at least monthly, with analyses being mainly qualitative in nature rather than quantitative. Barriers to the more widespread use of quantitative biomechanical analysis in elite swimming environments were explored. Constraints include time, cost and availability of resources, but other factors such as sources of information on swimming performance and analysis and control over service provision are also discussed, with particular emphasis on video-based methods and emerging sensor-based technologies.