Video self-modelling: an intervention for children with behavioural difficulties

There has recently been a growth in interest in the use of video technology in the practice of educational psychologists. This research explores the effects of a video self-modelling (VSM) intervention on the behaviours of a child in mainstream education using a single case study design set within a behaviourist paradigm. VSM is a behavioural intervention that requires the participant, in this instance a six year old boy, to view a short video of himself engaging in target behaviours. Baseline and post-intervention data were collected through classroom-based observations by the researcher in order to monitor the frequencies of the target behaviours and to evaluate the effectiveness of the VSM intervention. The participant demonstrated higher frequencies of target behaviours following the intervention. The results suggest that VSM is a promising method for educational psychologists to use as a proactive approach with pupils in educational settings to improve target behaviours.     

范德瓦尔斯频移及线型畸变现象

从理论上研究了囚禁于两电介质间薄原子蒸汽的频率调制吸收光谱中范德瓦尔斯频移及线型畸变现象,发现在频率调制情形下频移很明显,线型则由对称类色散型转为非对称类吸收型。采用频率调制的方法解决了在很多情形下采用直接法或吸收法不易实现对vdW作用势进行精确测量的难题。     

PLC在变频调速恒压供水系统中的应用

本文详细地介绍了三菱公司FX系列小型PLC在小区高楼恒压供水系统中的应用，并具体说明了系统工作原理和控制系统的设计。实际系统中由一台变频器和自耦降压启动器带动多台水泵，采用PLC实现PID调节和水泵的工频、变频运行切换。现场运行表明，该系统自动化程度高，稳定性好，完全符合工艺要求。     

复句类型的当代流行构式研究--以“X虽易，Y不易，且A且B”的功能及其演化为例

根据“演绎-归纳-演绎”的方法,构式“X虽易,Y不易,且A且B”既有基式的常用类型,也有变式的扩展方式;从构件性质与构式层次看,构式的逻辑顺序应该是“并列关系—因果关系—转折关系”;从句法-语义接口和话语-语用界面看,构式的表达功用主要体现在强化对比与凸显劝勉,是关联理论“明示-推理”模型下的反预期表达;从构式理据与形成动因看,高频使用、框式替换、泛化类推是推动构式演化的基本动因和主要机制,当然,自媒体时代信息传播的快捷化和网络语言的快餐化以及语言使用者的认知心理也是推动构式成熟的关键因素。     

Supporting Student Learning through Instructional Videos in Business Statistics

While statistics is an essential topic for business students, many students experience barriers to successful learning due to anxiety, motivation, or difficulty with quantitative understanding. This research examines the use of online videos with an effort to explore the relationship between student characteristics, video usage, and course performance measures. In addition, the study examines student perceptions of the supplemental resources in an effort to examine the efficacy related to student learning and performance. This study seeks to confirm previous research regarding the benefit of supplemental video resources and extend the knowledge base by understanding the impact for various types of students (e.g., level of course, level of previous academic performance, etc.). The study found that the use of the video resources varies based on students’ previous math performance and the difficulty of the material. Student ratings indicate that the videos were helpful in learning the content and that they provided an important resource when students needed additional tools to master the material. Analysis of the results provides implications for understanding how different students use online videos and offers recommendations for educators and researchers about how to enhance student success in difficult statistics coursework.     

教学视频中线索类型与学习者先前知识经验对学习的交互影响

教学视频因其多通道展现教学内容的特性而成为数字化学习资源的首选形态。线索作为教学视频中的重要引导性教学设计手段,探究其类型及学习者先前知识经验对学习效果的交互影响,有益于优化教学视频的设计策略。基于学习者先前知识经验水平(高水平和低水平)和线索类型(言语线索和视觉线索)两个维度,运用眼动追踪技术和认知负荷、学习满意度、学习效果等测量工具,通过实验考察二者对学习的影响及其内在机制后发现:学习者先前知识经验水平对认知负荷的影响显著;线索类型对学习满意度的影响显著,且线索类型与学习者先前知识经验水平在学习满意度上的交互效应显著;学习者先前知识经验水平对学习效果的影响显著,且线索类型与学习者先前知识经验水平在迁移测验成绩上的交互效应显著。实验结果表明,线索类型与学习者先前知识经验水平对学习满意度和学习效果存在明显的交互作用,即只有低知识经验水平学习者在学习含有视觉线索的教学视频后,学习满意度与学习效果才有显著提升。这可能是由于该类学习者在信息选择时存在困难,视觉线索可以帮助其提高信息搜索效率,而言语线索却会使其认知负荷超载。     

Access数据库中OLE对象的读写操作

分析了Access数据库OLE对象的特点，并给出了在Delphi环境下实际实现OLE对象的保存、打开与显示的处理方法．     

浅谈流媒体网站的建立

：随着Internet的带宽的不断增加,多媒体技术在互连网的应用越来越广泛。多媒体信息与传统的文字、文件信息在处理上有很大的区别,多媒体信息一般以流的方式在网上传输。本文将讨论如何在网站上建立一套视频点播系统应用于远程教学等方面。     

Teacher Educators Struggling to Make Complex Practice Explicit: Distancing Teaching through Video

This self-study examines our use of video with a cohort of preservice teachers as a means to address the challenges we face as teacher educators who are working with candidates in extensive clinical practice. We came to video as a nuanced way to discuss and make meaning of complex practice and as a means of bridging theory and practice. We found that our use of video supported preservice teachers and their mentors in decomposing, representing, and approximating practice. We also found that, as suggested by the literature, the use of video distanced preservice teachers from their experiences in practice. Finally, we discuss the implications for using video to support the work of rich clinical teacher education.     

平台媒体驱动下的视觉生产与技术调适——2019年中国新闻业年度观察报告

本文以2019年相关案例、事件和数据为基础,从新闻行动者、新闻内容、分发渠道、受众四个方面描述本年度中国新闻业的发展图景,概括年度变化特点和预测未来趋势。研究发现:本年度媒体融合面向移动互联时代进入更加纵深化发展阶段,专业媒体的规模进一步整合压缩,自媒体的监管政策加强。新闻内容产品呈现出混合情感传播模式主导下的可视化形态特征。传播渠道上,媒体通过平台化和移动化不断拓宽传播的覆盖面和到达率,并进一步将传播渠道下沉到基层。算法推荐和人工编辑相结合成为内容分发的主要机制。新闻受众方面,网络新闻与短视频的用户数量持续增长。时逢新中国成立70周年、中美贸易战等重大事件,网民的爱国情绪表达与媒体的宣传形成共振,全网的爱国主义情绪高涨。总体上看,平台媒体驱动下的视觉创新与技术调适是2019年新闻业变化的主要趋势。展望未来的发展趋势,视频将成为更加主流的内容产品形态,传媒业也将深入探索5G技术在传播领域的应用场景。