8mm微波辐射对小鼠运动能力影响的初步研究     

陈静侬  杨旸 《广州体育学院学报》2002,22(2):26-28

目的：探讨通信微波对生物运动能力的影响效应。方法：将小鼠暴露于通信微波(波长8毫米，频率35．6GHz，平均功率密度7．4—29．4mW/cm2)，比较观察小鼠游泳耐力、血液中白细胞凋亡率及小鼠血乳酸、血红蛋白含量及血浆中SOD水平的变化。结果：经微波连续暴露后，小鼠游泳时间较对照组有缩短的趋势，达到显著性差异，SDH、LDH活性下降。运动后小鼠血乳酸比对照组显著增加。结论：通信微波可以通过多种途径影响生物的运动能力。  相似文献   

Piece-by-Piece Review of Digitize-and-Lend Projects through the Lens of Copyright and Fair Use     

Michelle M. Wu 《Legal Reference Services Quarterly》2017,36(2):51-73

Digitize-and-lend library projects can benefit societies in multiple ways, from providing information to people in remote areas or with physical disabilities to facilitating the sharing of library resources with information-poor communities. This article explores the potential of digitize and lend as well as outlines how projects can be undertaken in a manner respectful of the balance of copyright.  相似文献   

Elementary school children’s understanding of science: The implementation of an extracurricular science intervention     

《Contemporary educational psychology》2017

The promotion of students’ achievement and competence in the so-called STEM disciplines is one cornerstone of current educational research and practice. In particular, as early as elementary school, the fostering of an adequate understanding of science is a normative goal of science education. It facilitates students’ science learning and enables them to understand the nature and development of scientific knowledge. Based on the relevance of the promotion of young children’s understanding of science, a corresponding science intervention was recently developed and successfully evaluated in a first study under highly controlled conditions. The goal of the present study was to investigate the effectiveness of this intervention when implemented in practice. One hundred seventeen third- and fourth-grade students and 10 trained course instructors participated in this study. We applied a randomized block design with waitlist control groups and repeated measures. The results revealed that children assigned to the intervention compared with children assigned to the waitlist control group showed better inquiry-related methodological competencies (a better understanding of the scientific inquiry cycle and experimentation strategies) and a higher need for cognition. The findings point to the successful implementation of the intervention and are compared with the results of the first study.  相似文献   

Improving cognitive and physical function through 12-weeks of resistance training in older adults: Randomized controlled trial     

Paulo Ricardo Pereira Dos Santos  Bruno Remígio Cavalcante  Andreya Karolyne Dos Santos Vieira  Marcos Duarte Guimarães  Antônio Marconi Leandro Da Silva  Anderson Da Costa Armstrong 《Journal of sports sciences》2020,38(17):1936-1942

ABSTRACT

We performed a randomized, controlled trial to analyse the effects of resistance training (RT) on cognitive and physical function among older adults. Fifty participants (mean age 67 years, ~60% woman) were randomly assigned to an RT program or a control group. Participants allocated to RT performed three sets of 10-15RM in nine exercises, three times per week, for 12-weeks. Control group did not perform any exercise. Variables included cognitive (global and executive function) and physical function (gait, mobility and strength) outcomes. At completion of the intervention, RT was shown to have significantly mitigated the drop in selective attention and conflict resolution performance (Stroop test: -494.6; 95%CI: -883.1; ?106.1) and promoted a significant improvement in working memory (digit span forward: -0.6; 95%CI: ?1.0; ?0.1 and forward minus backward: -0.9; 95% CI: ?1.6; ?0.2) and verbal fluency (animal naming: +1.4, 95%CI 0.3, 2.5). No significant between-group differences were observed for other cognitive outcomes. Regarding physical function, at completion of the intervention, the RT group demonstrated improved fast-pace gait performance (?0.3; 95% CI: ?0.6; ?0.0) and 1-RM (+21.4 kg; 95%CI: 16.6; 26.2). No significant between-group differences were observed for other mobility-related outcomes. In conclusion, RT improves cognitive and physical function of older adults.  相似文献   

面向新生的“微视频+代入式体验”信息素养教育研究     

洪跃 《图书情报工作》2019,63(20):88-95

[目的/意义]基于建构主义学习理论，借鉴翻转课堂先进理念，以提高个人信息素养能力的初学者为主要教育研究对象，调研分析其个性特征、信息行为和教育方式偏好。[方法/过程]通过调研分析，总结教育方式与学生需求之间的矛盾成因，提出面向新生的"微视频+代入式体验"信息素养教育创新模式，着重分析模式特点、构建策略和实施方案，并提出可行性组织策略。[结果/结论]"微视频+代入式体验"信息素养教育新模式，综合运用微视频所特有的视觉冲击力，克服教师语言抽象化的不足，同时通过代入式情境体验，完成知识吸收内化、高层次思维认知，有效提升学生的信息素养综合能力。  相似文献   

基于微博数据的中原城市群空间联系强度测度   总被引：1，自引：0，他引：1  

王开泳  邓羽 《中国科学院大学学报》2016,33(6):775-782

空间联系强度是城市群发展阶段、态势、功能定位的重要表征.在大数据背景下，随着移动终端的普及和网络联系平台的广泛使用，人流在不同地区的空间移动能够得到较准确的统计和表达.在总结以往城市群空间联系研究方法的基础上，提出一种新的基于微博数据判别城市之间空间联系强度的方法，弥补了由于缺乏城际通勤数据而导致的传统空间联系强度判别方法的不足.新方法可以较准确地判别城市群地区各个城市的空间联系强度与组织类型.  相似文献   

114例颈椎定点复位法加扶阳罐治疗颈椎小关节微错缝的临床观察     

孙大桥  冯高基  王德燕 《湖北体育科技》2016,(5)

目的:探讨颈椎定点复位法加扶阳罐治疗颈椎小关节微错缝的临床疗效。方法:114例患者均采用颈椎定点复位法加扶阳罐治疗。具体分四步。手法定位;松解肌肉;颈椎定点旋转复位;扶阳罐理筋温熨。5次一疗程。若还有症状,休息二天后,重复一疗程。结果:治愈率89.47%,总有效率99.12%。结论:此法可纠正颈椎紊乱的关节,缓解痉挛的肌肉,解除神经、血管的刺激和压迫,改善局部血液循环,使颈椎各关节保持相对的稳定。疗效好,安全易行,值得推广。  相似文献   

MEMS的应用及发展前景   总被引：1，自引：0，他引：1  

刘虹  刘洁  杨立峰 《云南电大学报》2003,5(3):61-62

MENS是当今迅速发展的一门新兴学科。本在对MEMS技术进行概述的基础上，列举了MENS技术的应用，介绍了MENS技术的发展前景。  相似文献   

运用念动练习法提高太极拳教学效果的实验研究     

丁勇春 《宁德师专学报(自然科学版)》2006,18(2):159-161

根据“念动练习法”的基本理论,突破武术教学只注重灌输式传授基本技术、技能忽略学生主观能动性培养的模式．通过教学实验证明,运用“念动练习法”教学策略可以提高学生的学习兴趣,增强学习的动机,从而提高高校太极拳选项课教学质量．  相似文献   

中小学信息技术教学方法的研究热点、主题与趋势--基于749篇硕士论文的共词分析     

黄斌  王丹妮 《数字教育》2020,(2):16-21

为了直观地展示出我国中小学信息技术教学方法的研究现状,文章以749篇硕士论文为研究样本,采用词频分析、因子分析、聚类分析、战略坐标图分析等多种统计分析方法,论述了中小学信息技术教学方法的研究热点、主题与趋势。结果发现:在网络学习环境和建构主义思想的影响下,以"微课教学法""翻转课堂教学法"为代表的新型教学方法已经在我国中小学信息技术课程中得到了广泛应用。此外,多种教学方法之间相互弥补自身"短板"逐步走向融合,已经成为完善与创新教学方法的现实选择。  相似文献