我国优秀女子跳远运动员空中技术 特征对起跳效果的影响

采用文献资料法、录像解析法、数据处理法,对参加全国田径锦标赛女子跳远运动员(最后筛选取20名)空中技术特征进行研究,探讨空中技术与运动成绩之间的关系。结论认为:我国女子跳远运动员空中技术对起跳效果有影响。走步式空中技术能在起跳过程中通过紧密衔接的摆动腿加速前摆和制动前摆,加快起跳腿的缓冲和蹬伸动作速度,促进身体重心获得更大的垂直速度,而且水平速度没有更多的损耗,从而获得更大的腾起速度和腾起角,腾起时身体重心的垂直位置更高,最终取得优异成绩,促进跳远起跳技术朝着快速积极的方向发展。     

Why they sat still: the ideas and values of long‐serving teachers in challenging inner‐city schools in England

Within the UK there are grave concerns about retention and attrition rates within the teaching profession, particularly in challenging schools. These are compounded by worries about the gap that will be left as long‐serving teachers reach retirement age. This article is about the working lives of long‐serving teachers in three high‐poverty urban schools in England. In a climate in which teaching is tightly controlled and suffering from problems of retention and recruitment, the teachers discuss intensely personal and emotional commitments to their work‐place. Qualitative in‐depth interviews with 20 long‐serving teachers, all of whom had management responsibilities, are used to explore their lives and careers. These histories evoke a strong sense of the ideas and values that make up their personal and professional identities. These are then contrasted with the ideas and values in officially mandated views of progression within the profession. Within the stories of their professional lives, the teachers talk about the emotional dimensions of their work and the emotional ties of their ‘work‐place’. The article concludes that recognition of the emotional dimensions within teachers’ work at an official level could go some way to helping with recruitment and retention in schools facing challenging circumstances.     

诗人与歌手：民族精神和个人情感的记录者——黎族与其他壮侗语族民间叙事长诗发生与传承机制比较

民间叙事长诗作为反映民族生活与民族心理的重要文学种类,黎族民间叙事长诗的发生与传承机制与其他壮侗语族民间叙事长诗发生与传承机制有许多相似之处,但也有自己的地域特色。通过各自特色的比较,找出他们相似之处,同时也指出他们所包含的各自的地域特色。     

基础研究类创新人才培养模式改革探析

从＂长周期＂人才培养的必要性入手,探讨基础研究类学科人才培养模式的内涵与科学定位,并结合中国科大培养模式改革的实践对＂长周期＂、＂贯通式＂基础研究类人才培养模式的重构进行探析,提出相应的建议与对策,以期能够为研究生分类培养模式的重构和创新人才能力的提升提供借鉴。     

着眼长远 以人为本——市级骨干教师培训应关注的问题

从着眼长远的角度考虑,从大连地区教师教育实际出发,坚持“研训问题化、问题课题化、课题课程化”研训工作思路不动摇,扎实做好骨干教师培训工作。     

长余辉发光材料的机理及应用

介绍了长余辉发光材料的原理及主要材料的性能特点,例举了长余辉发光材料的应用领域,探讨了长余辉发光材料的发展方向.     

Cell membrane-covered nanoparticles as biomaterials

Surface engineering of synthetic carriers is an essential and important strategy for drug delivery in vivo. However, exogenous properties make synthetic nanosystems invaders that easily trigger the passive immune clearance mechanism, increasing the retention effect caused by the reticuloendothelial systems and bioadhesion, finally leading to low therapeutic efficacy and toxic effects. Recently, a cell membrane cloaking technique has been reported as a novel interfacing approach from the biological/immunological perspective, and has proved useful for improving the performance of synthetic nanocarriers in vivo. After cell membrane cloaking, nanoparticles not only acquire the physiochemical properties of natural cell membranes but also inherit unique biological functions due to the presence of membrane-anchored proteins, antigens, and immunological moieties. The derived biological properties and functions, such as immunosuppressive capability, long circulation time, and targeted recognition integrated in synthetic nanosystems, have enhanced their potential in biomedicine in the future. Here, we review the cell membrane-covered nanosystems, highlight their novelty, introduce relevant biomedical applications, and describe the future prospects for the use of this novel biomimetic system constructed from a combination of cell membranes and synthetic nanomaterials.     

高中立定三级跳远教学与训练策略

在高考制度深化改革的背景下,高中阶段的学科教学越来越注重学生身体素质的培养,体育成为高考必考的一门科目。为了强化高中生的锻炼身体意识,使其拥有健康的心态和强健的体魄,高中体育课堂上出现了越来越多的运动项目与教学内容,如立定三级跳远等,有利于丰富课堂内容,锻炼学生的各种运动能力。本文针对高中立定三级跳远教学与训练策略展开分析。     

“翻转课堂教学模式”在小学体育教学改革实践中的运用研究--以小学三年级《立定跳远》教学为例

立定跳远,在小学三年级的体育教材中被列为学习跳跃的主要教学内容,为了提高了教学的效率和质量,教师经过多次教学改革实践,从传统的"挤牙膏式"的教学,再到套入情境的教学,最后运用翻转课堂教学模式进行教学,一步步地实践并对比和反思,发现运用"翻转课堂教学模式"的立定跳远课不但有趣还有效,教学效果得到明显提高。     

论灌阳县丧葬仪式“大歌”的庞杂性特征

灌阳县丧葬仪式之中的“大歌”,纳数百桩事于一体,内容博而杂；集百千言为一歌,结构长而大,此二者相辅相成,造就了包罗灌阳历史和现实,收尽生活种种现象的长大篇章,同时也造就其庞杂性特征。这一特性,当地居民用一字概而括之,谓之曰“大”。