Health-related fitness knowledge growth in middle school years: Individual- and school-level correlates

BackgroundHealth-related fitness knowledge (HRFK) has been an essential concept for many health and physical education programs. There has been limited understanding and longitudinal investigation on HRFK growth. This longitudinal study examined HRFK growth and its individual- and school-level correlates in middle school years under 1 curriculum condition: Five for Life.MethodsParticipants were 12,044 students from 47 middle schools. Data were collected at both individual/participant and school/institution levels. Individual-level variables included gender, grade, and HRFK test scores. School-level variables included percentage of students receiving free and reduced meals (FARM), student-to-faculty ratio for physical education, and school academic performance (SAP). We used hierarchical linear modeling to examine HRFK 3-year growth in relation to individual- and school-level correlates.ResultsThe average HRFK score at 6th grade for females was 42.81% ± 1.32%. The predicted HRFK growth was 17.06% ± 1.02% per year, holding other factors constant. A 1-standard deviation increase in FARM correlated with a 14.68%-point decrease in predicted test score (p = 0.02). A 1-standard deviation increase in SAP was associated with an 11.90%-point increase in HRFK score. Males had a significantly lower growth rate than females during the middle school years (0.78%/year, p = 0.02).ConclusionThe result showed that both individual- and school-level variables such as gender, FARM, and SAP influenced HRFK growth. Educators should heed gender differences in growth curves and recognize the correlates of school-level variables.     

“双一流”背景下师范院校教师发展服务支持现状及路径

文章通过对4所师范类国家级示范教师发展中心工作的目标、内容、结果、特色的梳理,了解教师发展服务支持的四个疑问、四个转变,以及提出师范院校如何更好地为教师发展提供服务支持的四个创新。     

高职院校微课教学的现状、问题及优化路径探析

针对高职院校微课教学在实践中存在的重比赛、轻应用,重形式、轻实效,重讲授、轻互动,重技术、轻内容等方面的问题,提出通过采取坚持和发挥学生的主体作用,探索基于“互联网+”的混合教学模式,完善对微课教学的激励制度等措施,以进一步规范微课教学,优化其在高职教学中的作用和效果。     

保定农村电子商务发展策略研究

“互联网+”背景下,电子商务与农村经济的结合为农业发展带来了新的思路,但同时农村电子商务在发展中也面临诸多问题。引入比较优势指数法对保定各地优势农产品进行测算,并就保定农村电商发展现状进行实地调研,结果表明:保定农产品网店已初具规模,店铺分布呈现非均衡性,经营主体以青年人为主,原材料供应型店铺占主导地位,电商发展的配套系统如人才、科技信息服务平台、物流配送系统等仍不完善,成为制约电商发展的主要因素,亟须各部门配合综合加以解决,形成农村电商的整体合力,为推动农村产业结构的转型升级提供助力。     

留学生与中国近代高等工程教育

中国近代高等工程教育在其产生初期,带有浓厚的半殖民地性质,对西方工业先行国有很强的依附性,是留学生的努力介入使中国高等工程教育开始摆脱对西方国家的依附性,逐步走向独立化和现代化之路。他们创办和主持工科院校,设置新的工科专业,开设新兴的工科课程,编写工科的中文教材,筹建工科研究所和工程学会,积极开展科学研究,是中国近代高等工程教育现代化的有力推动者。     

多元互补--新时期我国硕士研究生培养模式的战略选择

研究生扩招使得生源更加多样化;随着经济的发展,社会对硕士研究生的需求也呈现多样化的趋势;同时我国高校具有多样性和层次性的特点;研究生的布局结构也不均匀。受以上诸多因素的影响,我国的硕士研究生不宜采用单一的培养模式,应该使多元互补成为我国硕士研究生培养模式的战略选择。     

培养理科学生创新能力的探索与实践

加强理科学生创新能力培养是当前理科教育改革的重要课题。本文以我院应用物理学、电子信息科学与技术两个理科专业学生为研究对象,以系统的思想、开放式教学理念为指导,从创新平台、创新环境、创新实践等方面进行改革与研究,探索出了一条适合理科学生创新能力培养的新模式。     

Molecular design revitalizes the low-cost PTV-polymer for highly efficient organic solar cells

Developing photovoltaic materials with simple chemical structures and easy synthesis still remains a major challenge in the industrialization process of organic solar cells (OSCs). Herein, an ester substituted poly(thiophene vinylene) derivative, PTVT-T, was designed and synthesized in very few steps by adopting commercially available raw materials. The ester groups on the thiophene units enable PTVT-T to have a planar and stable conformation. Moreover, PTVT-T presents a wide absorption band and strong aggregation effect in solution, which are the key characteristics needed to realize high performance in non-fullerene-acceptor (NFA)-based OSCs. We then prepared OSCs by blending PTVT-T with three representative fullerene- and NF-based acceptors, PC₇₁BM, IT-4F and BTP-eC9. It was found that PTVT-T can work well with all the acceptors, showing great potential to match new emerging NFAs. Particularly, a remarkable power conversion efficiency of 16.20% is achieved in a PTVT-T:BTP-eC9-based device, which is the highest value among the counterparts based on PTV derivatives. This work demonstrates that PTVT-T shows great potential for the future commercialization of OSCs.     

新工科背景下机器人知识体系与课程内容研究

该研究分别从历史发展、知识构成与社会效应的不同视角,概述了机器人技术与理论的发展脉络,采用文献分析方法考察当前不同院校的机器人专业培养方案与机器人课程教材知识体系和内容构成,在新工科建设持续深入推进的背景下,提出新的机器人应用领域基本特征,探讨机器人课程新的内涵和知识边界,最后为不同类型的高校提出了相应的机器人课程知识...     

清代名人存世书目的收集整理及其意义

本文阐述了中国文化古籍因国家无文化遗产保护法规而大量流失海外,当代中国对文化遗产保护非常重视,制定了文物保护法,划定了历史遗迹保护范围.作者进一步阐述了收集整理清代名人存世书目工作的意义.参考文献5.