谈直观教具在平面几何教学中的应用

介绍了在平面几何教学中,如何通过使用直观教具达到好的教学效果     

我国女子20 公里优秀竞走运动员心理训练结构及训练策略

通过调查法、测试法、数理统计法对决定我国女子20 km优秀竞走运动员心理训练功能的心理训练结构及心理训练实施进行研究,认为女子20 km心理训练结构包括基础训练要素(训练依据与准备要素)、核心训练要素(训练操作要素)及支持训练要素(训练保障要素),求出核心训练要素各心理变量与竞走成绩相关关系、数量关系;对女子竞走运动员心理训练实施及实施问题进行分析.     

心理训练——让学生在体验中成长——“盲行”游戏收获

＂盲行＂游戏是团体心理辅导训练中的一种游戏活动。采用活动、体验、感悟和提高的模式,使参与者在体验人际交往中情绪和行为的同时,产生一种心灵的碰撞、人格的互动,实现多元多赢的交流,在乐趣中受训、在实效中成长。     

多功能小型中央空调实验装置的研制

目前市面上的中央空调实验装置功能单一,仅能演示单一的空气调节类型,与实际教学内容及要求有一定的差距。为此研制的多功能小型中央空调实验装置整合了3种空气调节的方式,符合高职院校制冷实训的内容及需求。使学生对空气-水系统（风机盘管装置）,风管式系统及辅助的冷冻水系统、冷却水系统,有一认识和动手的机会,并可观察故障现象,分析故障原因,解决故障。     

图书馆如何向农民工提供知识援助

农民工对改革开放贡献最大但收益最小,是处于社会底层的庞大弱势群体。他们整体文化素质低、文化权益得不到保障,但求知欲强烈,渴望利用图书馆。在国家提出构建公共文化服务体系、实现公共文化服务均等化的政策环境下,图书馆应通过实行全面免费服务、以合作方式多办临时或半临时图书室、扶持社会力量自办农民工图书馆等制度创新来向农民工提供知识援助。加强农民工图书室的业务管理、利用流动书车送书、设立开放的农民工推荐书架、定期为农民工开展培训与文化活动,是图书馆服务农民工的积极有效方式。     

发展援助与中国经济发展

官方发展援助弥补了发展中国家经济发展过程中资金的不足.随着中国的对外开放,作为最大的发展中国家,中国开始接受双边和多边发展援助.这些援助在缓解资金短缺、吸收国外的先进技术与管理经验等方面都发挥了显著的作用,而对华援助给援助国带来的收益也是显而易见的.将发展援助政治化,减少或终止对华援助并不会对中国经济产生大的不利影响,中国的改革开放进程也不会因此停止.中国希望得到发达国家的援助,但绝不依赖这些援助;援助可以促进发展,但发展最终还是取决于内因.     

浅谈英汉习语直译的辅助手段

英汉习语之间的互译既可用直译,也可用意译,在很多情况下是通过直译实现的。直译英汉习语多数情况下需要辅助手段,才能较好地促进文化交流。文章探讨了常见的辅助手段的形式、特点和作用。     

高校学生创新资助形式的思考

在高校资助工作的实践中,＂资助＂与＂育人＂的目标存在一定程度的背离。如何实现资助育人的根本目的,是高校资助工作急需解决的问题。以高校资助实践为依据,提出创新资助形式的相关建议与思考。     

30 min of treadmill walking at self-selected speed does not increase gait variability in independent elderly

Walking is one of the preferred exercises among elderly, but could a prolonged walking increase gait variability, a risk factor for a fall in the elderly? Here we determine whether 30 min of treadmill walking increases coefficient of variation of gait in elderly. Because gait responses to exercise depend on fitness level, we included 15 sedentary and 15 active elderly. Sedentary participants preferred a lower gait speed and made smaller steps than the actives. Step length coefficient of variation decreased ~16.9% by the end of the exercise in both the groups. Stride length coefficient of variation decreased ~9% after 10 minutes of walking, and sedentary elderly showed a slightly larger step width coefficient of variation (~2%) at 10 min than active elderly. Active elderly showed higher walk ratio (step length/cadence) than sedentary in all times of walking, but the times did not differ in both the groups. In conclusion, treadmill gait kinematics differ between sedentary and active elderly, but changes over time are similar in sedentary and active elderly. As a practical implication, 30 min of walking might be a good strategy of exercise for elderly, independently of the fitness level, because it did not increase variability in step and stride kinematics, which is considered a risk of fall in this population.     

The impact of Nordic walking training on the gait of the elderly

The purpose of the current study was to define the impact of regular practice of Nordic walking on the gait of the elderly. Thereby, we aimed to determine whether the gait characteristics of active elderly persons practicing Nordic walking are more similar to healthy adults than that of the sedentary elderly. Comparison was made based on parameters computed from three inertial sensors during walking at a freely chosen velocity. Results showed differences in gait pattern in terms of the amplitude computed from acceleration and angular velocity at the lumbar region (root mean square), the distribution (Skewness) quantified from the vertical and Euclidean norm of the lumbar acceleration, the complexity (Sample Entropy) of the mediolateral component of lumbar angular velocity and the Euclidean norm of the shank acceleration and angular velocity, the regularity of the lower limbs, the spatiotemporal parameters and the variability (standard deviation) of stance and stride durations. These findings reveal that the pattern of active elderly differs significantly from sedentary elderly of the same age while similarity was observed between the active elderly and healthy adults. These results advance that regular physical activity such as Nordic walking may counteract the deterioration of gait quality that occurs with aging.