适应体育概念辨析及应用的必要性

适应体育概念的形成与矫正治疗、运动康复、残疾人体育等有着深远的渊源,它是随着实践和理论研究的发展而不断丰富和发展的。长期以来中国适应体育实践领域相关概念的使用混乱并缺乏科学性。从概念的角度讲,与其它概念相比,"适应体育"是相对科学和准确的,能更准确和全面地反映出该体育现象的特征,具有较强的概括性。因此,无论在学科建设、理论研究方面,还是在实践活动领域,建议统一采用"适应体育"的概念。     

刘虹竞走关键技术的运动学特征分析

运用文献资料法、三维定点摄像法、影像解析法等,以刘虹参加2016年全国竞走大奖赛暨奥运选拔赛20km比赛的技术特征为研究对象,对其技术的优缺点进行归纳总结,旨在为其里约奥运会技术改进提供参考。结果表明：总体来看刘虹技术的规范性、实效性特征较好。技术规范性特征具体表现为其腾空时限处于模糊腾空时限内,但是最后冲刺阶段由于提速导致腾空时限远超过临界值。头顶垂直位移稍偏大,摆动腿离地瞬间膝角偏小,垂直膝关节角度同样偏小,且重心移动速度越快,其膝角越小,易形成“跑”的动作表象。着地技术符合裁判员判罚的直腿标准,且垂直支撑阶段“反弓”动作明显。实效性特征表现为左、右步长均有提高,“小步高频”的中国技术风有较大改观;但仍存在左、右不均衡现象。两大腿夹角偏小,说明刘虹向前“送髋”的技术仍需改进。     

磁场和自由界面热流下二维液态锡膜流的传热模拟

液态金属偏滤器具有自修复和热负荷能力,因此成为偏滤器的重要设计方案。偏滤器上的液态金属膜流处于磁场和高强度热流下,且装置运行时产生的低频扰动会使薄膜流动发展为毛细孤立波。在毛细孤立波膜流中,波谷位置的毛细分离涡会显著增强该区域的对流换热。研究雷诺数为58的液态锡毛细孤立波膜流在底壁附近的换热现象。结果表明：无外加磁场和自由界面热流时,液态锡毛细孤立波薄膜流动复现了努塞尔数在波谷位置显著增强的现象;仅施加磁场时,由于洛伦兹力的阻尼效应,毛细分离涡处的换热增强效果被抑制;仅施加热流时,由于膜流被加热,总换热量增加,导致努塞尔数分布更均匀;同时施加磁场和热流时,两者的作用会叠加。     

成人弱势群体教育探讨

在构建和谐社会的时代背景下,弱势群体教育问题已引起社会的广泛关注,教育特别是成人教育如何发挥自身功能关注这一群体中成人的教育和培训显得尤为必要。     

浅议价格效应的弹性分解

序数效用论以无差异曲线与预算线为分析工具,通过价格效应、收入效应与替代效应三个概念,对需求定律所包含的行为基础作出了解释。运用弹性分析方法,重新解释需求定律,具有其创新之处。     

论残疾青少年父母的压力情况及亲职教育的实施

残疾青少年的父母承担着既普遍又特殊的压力,会对青少年的发展及整个家庭起到重大影响。本文介绍了残疾青少年父母的压力表现,并进一步探讨了有助于减轻父母压力的亲职教育措施。     

培训评估对于提高企业在线培训有效性的研究

文章从保障基于网络环境的企业在线培训教学质量的六要素以及构建培训评估体系等方面进行研究,以期寻找提高企业培训有效性的途径,为推进企业在线培训的发展进行探索和研究。     

信息时代高校资料室管理初探

面对全球信息化的新形势和新要求,基于目前高校资料室管理的现状,文章从图书资料和非书资料两大方面,分析了目前高校资料室管理中所存在的问题,探索了对资料进行全面管理的思路和若干措施。     

Students’ Ideas about How and Why Chemical Reactions Happen: Mapping the conceptual landscape

Research in science education has revealed that many students struggle to understand chemical reactions. Improving teaching and learning about chemical processes demands that we develop a clearer understanding of student reasoning in this area and of how this reasoning evolves with training in the domain. Thus, we have carried out a qualitative study to explore students reasoning about chemical causality and mechanism. Study participants included individuals at different educational levels, from college to graduate school. We identified diverse conceptual modes expressed by students when engaged in the analysis of different types of reactions. Main findings indicate that student reasoning about chemical reactions is influenced by the nature of the process. More advanced students tended to express conceptual modes that were more normative and had more explanatory power, but major conceptual difficulties persisted in their reasoning. The results of our study are relevant to educators interested in conceptual development, learning progressions, and assessment.     

Social factors and adult learners’ motivations in re‐entering higher education

While there is less doubt that adult learners are motivated by different reasons to re‐attend school, it is important to note that, other than psychological factors, social factors are also important in shaping the participation decision. Although researchers have attempted to include social factors in participation models, there is not a conclusive relationship between socioeconomic background and motivation for participation. This study attempts to clarify the linkage between different social factors and adult motivations in re‐entering school to acquire a university degree. By regressing motivations onto three sets of social variables, we found that family role and social position have significant impact in affecting some of the motivations for re‐entering school. These results confirm that adult motivations to learn are embedded within the social lives of adults.