《中国国家地理》新浪微博传播效应分析     

柴玥  金保德  杨中楷 《中国科技期刊研究》2015,26(5):493-498

【目的】提升科普期刊的微博传播效应。【方法】 统计分析《中国国家地理》新浪官方微博4年间（2009.9.22-2013.9.21）的6882条微博内容及相关信息,并使用北大PKUVIS软件对微博传播个案进行可视化分析。【结果】 《中国国家地理》微博出版已形成一定规模,具备相对稳定的格局和固定的受众群体;传播呈现出多元中心效应,实现多层级深度长效传播;微博链接产生信息自我增强效应,并逐渐脱胎于网站内容移植,形成独立出版机制;微博集成资源,推动了期刊品牌一体化发展。【结论】科普期刊与微博新媒体的融合可以提升科学传播效应,微博在传播范围、传播效果、品牌扩散方面具有媒介优势,能促进科普期刊的良性发展。  相似文献   

新媒体赋权：健康传播的机遇与挑战     

宋艳丽  房姗 《毕节学院学报》2015,(5):105-109

新媒体赋权作为一种实践性的社会研究,在很大程度上可以解决健康传播中存在的现实问题——通过新媒体的技术优势赋予受众通过新媒体主动获得健康信息、发展积极的健康意识,促进医患之间更加平等的对话与交流,从而在有效实现个体健康赋权的同时,以集体的方式影响公共健康政策、实现赋权健康传播的终极目标,即全面提高受众健康素养。新媒体赋权健康传播既具有现实结合的可能性,也面临着一系列问题,需要有针对性地加以解决。  相似文献   

基于OPNET的MVB总线仿真研究     

黄东  魏志强 《教育技术导刊》2011,10(1):52-54

列车网络控制技术是高速列车发展的一项关键技术.为了评估多功能车辆总线(Multiple Vehicle Bus,MVB)车辆级网络通信系统的性能,优化网络设计,采用Opnet Modeler搭建车辆级通信网络模型,包括车辆的网络拓扑结构模型、链路模型、节点模型和进程模型.利用所搭建的模型,对车辆级通信网络的时延性、吞吐...  相似文献   

喀什古代口头传播传统     

张唐彪 《喀什师范学院学报》2015,(1)

作为我国西北地区一个有着悠久历史的边陲重镇,喀什自古以来就是一个多民族聚居的地方。在这里,各民族共同创造了丰富多彩的口头文学作品,形成了源远流长的口头传播传统。  相似文献   

Do students learn what they teach when generating teaching materials for others? A meta-analysis through the lens of learning by teaching     

《Educational Research Review》2022

Students can generate teaching materials for others. However, solid evidence of the learning effect for the student creating the material is needed. This meta-analysis aims to explore current evidence of the learning-by-teaching potential effect on students’ learning of the content they teach. A total of 23 articles were included in the meta-analysis, providing 62 comparisons between an intervention in which students were required to create a teaching material and an alternative condition. Possible moderators were examined as well (i.e., product, educational level, content area, and access to source material). Results show statistically significant differences in favour of creating teaching materials when compared to business-as-usual or alternative interventions, with an overall effect of 0.17. However, the type of product and the access to source material significantly moderate the findings. Audio-visual and visual materials considerably outperform textual materials. Having no access to the source material is better than having full access to it. No publication bias was detected. However, the type of control group moderates the findings: creating teaching materials shows a significant effect when compared to nonbeneficial interventions rather than to other expected beneficial interventions. Nonbeneficial interventions refer to business-as-usual or alternative interventions that are not expected to influence the outcome much, while beneficial interventions are those that are known or expected to have a positive effect. The findings are discussed based on the different views on the underlying learning-by-teaching mechanisms. Limitations as well as implications for practice, policy, and future research are underlined.  相似文献   

Let's talk evidence – The case for combining inquiry-based and direct instruction     

《Educational Research Review》2023

Many studies investigating inquiry learning in science domains have appeared over the years. Throughout this period, inquiry learning has been regularly criticized by scholars who favor direct instruction over inquiry learning. In this vein, Zhang, Kirschner, Cobern, and Sweller (2022) recently asserted that direct instruction is overall superior to inquiry-based instruction and reproached policy makers for ignoring this fact. In the current article we reply to this assertion and the premises on which it is based. We review the evidence and argue that a more complete and correct interpretation of the literature demonstrates that inquiry-based instruction produces better overall results for acquiring conceptual knowledge than does direct instruction. We show that this conclusion holds for controlled, correlational, and program-based studies. We subsequently argue that inquiry-based and direct instruction each have their specific virtues and disadvantages and that the effectiveness of each approach depends on moderating factors such as the learning goal, the domain involved, and students' prior knowledge and other student characteristics. Furthermore, inquiry-based instruction is most effective when supplemented with guidance that can be personalized based on these moderating factors and can even involve providing direct instruction. Therefore, we posit that a combination of inquiry and direct instruction may often be the best approach to support student learning. We conclude that policy makers rightfully advocate inquiry-based instruction, particularly when students’ investigations are supplemented with direct instruction at appropriate junctures.  相似文献   

The validity of student ratings of teaching quality: Factorial structure,comparability, and the relation to achievement     

《Studies in Educational Evaluation》2023

Student ratings are widely used to assess teaching quality in primary and secondary education. This necessitates a thorough examination their validity and reliability in such contexts. To this end, we present validity evidence for using student ratings of teaching quality based on their factorial structure, comparability across grades and subjects, and relation to achievement. Based on data from the 2019 Trends in Mathematics and Science Study (TIMSS) and its national extensions in Norway (N = 3951 5th graders and N = 4575 9th graders), we could confirm a theoretically assumed three-dimensional factor structure (i.e., classroom management, cognitive activation, and supportive climate). Moreover, classroom management and supportive climate were more comparable across grades and subjects then cognitive activation. Finally, classroom management was associated with achievement across all groups, whereas other dimensions showed mixed results, especially across grades. Overall, the findings indicate that students, especially in Grade 9, can provide a valid assessment of teaching quality.  相似文献   

基于WIFI技术的矿井下无线语音通信系统     

刘晨辉  ;谭文群 《科技广场》2014,(7):96-98

目前,小灵通已经被强制退市,迫切需求一种新的通信方式实现井下无线通信。本文提出了运用WiFi无线宽带技术于煤矿井下无线语音通信系统中,结合现有的WLAN网络实现无线的VoIP语音通话。  相似文献   

4G移动通信技术特征及应用分析     

林韩辉 《人天科学研究》2014,(7):9-10

4G移动通信技术正逐渐渗透到人们生活的各个方面。介绍了4G移动通信技术的概念及特征,分析了4G移动通信技术在高清视频播放、车联网、视频会议、智能家居、移动图书馆、多媒体即拍即传等方面的应用。  相似文献   

基于iOS客户端的酒店管理系统设计与实现     

程文静  刘燕美  稂光雨 《人天科学研究》2014,(8):66-68

介绍了使用美国苹果公司的Xcode4.5工具开发的iOS客户端酒店管理系统,详细论述了基于iPhone OS操作系统及Interface Builder图形界面的酒店管理系统的设计与实现过程。该系统是在Mac OS操作系统下进行开发的,主要面向基于iPhone OS 3.2版及以上操作的iPhone终端应用软件,可以支持iPhone终端通过无线互联网通信,实现随时随地预订点餐操作。  相似文献