速度攀岩运动员上肢肌表面肌电信号变化的研究

记录速度攀岩运动员上肢肌最大肌力的40%、60%和80%三种负荷强度下分别进行肘关节屈伸运动时腕屈肌和腕伸肌的表面肌电(sEMG)信号,并用MegaWin软件对之进行时、频阈指标的分析。结果表明:(1)sEMG信号分析中时阈指标AEMG和频阈指标MF、MPF都能较好监控速度攀岩运动员进行上肢肌力量训练时腕屈肌及腕伸肌的疲劳状况。(2)MF、MPF、AEMG出现显著下降时间的提前与负荷有着密切的关联,这为速度攀岩运动员训练上肢肌力量提供了科学的理论依据:教练员或运动员应根据上肢肌力量训练的持续时间来选择相应的运动负荷。(3)攀岩运动中腕屈肌与腕伸肌往往同步用力。所以,在平时的训练中都要重视腕屈肌、腕伸肌的力量训练,而不能有所偏向。     

我国农村初中、小学体育现状调查研究

调查结果显示:河南省农村初中、小学能够按照国家规定正常开设体育课,但执行体育教学大纲在85%以上的学校比例较小;少数学校领导片面追求升学率,忽视学校体育;农村初中、小学体育经费、场地、器材不足;体育教师待遇、职称偏低,思想不稳定,是影响河南省初中、小学学校体育发展的重要原因.建议:加强农村初中、小学学校体育的管理与监督,改革和完善适合农村学校体育发展的竞争激励机制.     

Using iPad tablets for self‐modeling with preschoolers: Videos versus photos

As technology becomes more accessible and acceptable in the preschool setting, teachers need effective strategies of incorporating it to address challenging behaviors. A nonconcurrent delayed multiple baseline design in combination with an alternating treatment design was utilized to investigate the effects of using iPad tablets to display video self‐modeling and activity photos for three preschoolers during circle time. During baseline, all three children demonstrated low levels of engagement and high levels of off‐task behavior compared to peers. The intervention phase consisted of alternating between showing the child the self‐video and photos prior to circle time. A child preference phase was conducted whereby each child self‐selected the video or photo prior to circle time. For all three children both videos and photos led to increased engagement and decreased off‐task behaviors. During the child preference phase, all three children selected the video most frequently. Social validity data demonstrated teacher and child preference for the video self‐modeling condition.     

Teacher Perceptions of School Consultant Social Influence Strategies: Replication and Expansion

The goals were to (a) replicate the findings of previous research with regard to the Consultee/Teacher Version of the Interpersonal Power Inventory (IPI), and (b) advance the literature by examining IPI scores about a current consultation relationship. Sample 1 included 99 elementary school teachers (44.4% Hispanic) who completed the IPI. Results replicated Erchul et al. Sample 2 (N = 37; 45.9% Hispanic) represented a subset of Sample 1 who participated in a consultation project and completed the IPI about influence in their current consultation relationship. The results advance the literature by offering evidence for convergent and predictive validity of the IPI soft power bases. Teachers who reported being influenced by soft power strategies experienced greater change in their behaviors and their students’ behaviors than those who reported being not influenced by such strategies. Implications for research and practice in school consultation are discussed.     

Find the Message Puzzle

Instructions:Answer the clues (information which helps you find the answer) from 1-20.Put a line through each answer-the first one is done for you.In the boxes which you have not put a line through,you will find a message.What is the message?     

Early stages in building hybrid activity between school and work: the case of PénArt

This formative intervention documents the emergence of a hybrid activity aiming at student engagement and academic achievement. In this context-bound study, early stages of this activity consisted in establishing PénArt meant to enable high school students with difficulties to start up their own business at school. It involved reaching agreements between a high school and a youth centre so that high school students engage in the production and selling of their branded t-shirt. At the frontiers of their respective activity system, students, youth workers, special education teachers and members of the school board took actions to cross boundaries and redefine their interrelations. Cultural historical activity theory was fruitful to document the development of a new object-oriented activity. Tensions and contradictions revelaled to be the key moments in the emergence of the hybrid activity. Expansive learning led us to understand that, in a conflicting situation, a collective’s agentive actions create an expansive form of learning and leads to a successful entrepreneurship experience. Change laboratory capacity to foster change for cooperative education in Quebec was successful. The students enrolled in a regional entrepreneurship contest and won it. That was a significant event for students with low self-esteem linked with their performance at school.     

Identifying and addressing themes of job dissatisfaction for secondary principals

Secondary principals serve in important roles that are complex, high-stress, and include demanding job responsibilities. Key stakeholders such as superintendents, school board members, and legislators must understand the challenges facing secondary principals in order to address the current themes of job dissatisfaction. Using new survey data compiled from 176 secondary principals across a state in the Midwest United States, this study shows four themes of job dissatisfaction are plaguing secondary principals: high job demands with unreasonable expectations, managing difficult stakeholders, problematic work/life balance, and lack of support. This study concludes with practical suggestions to address each theme of job dissatisfaction.     

“3级5步”教学模式及其实践探索——以成都七中万达学校历史教学为例

有效课堂中有许多任务,而任务可以分解为三级不同层次的问题,不同层次的问题可采取三级不同的对话来解决,对话中有激烈冲突,冲突中有精彩生成,生成中有愉快体验,体验中有知识形成和能力生成.有效完成教学任务,实现课堂教学目标,往往都要通过“问题式导入、原生态表达、多维对话、创生性对话、反思性追问”五步.为此,成都七中万达学校提出了“3级5步”教学模式.该模式在全校初步实施后,对历史学科的教学产生了重要作用,教师的教学和学生的学习方式出现了双重转变.     

农村公共产品供给:现实挑战与发展选择

农村公共产品是具有非竞争性和非排他性,用于满足农村公共需要的产品。公共产品从理论上分析应该由政府提供,但由于混合产品的存在也为其他主体参与农村公共产品的供给提供了理论支持。现阶段,我国农村公共产品供给不容乐观,存在供给总量不足、供给主体失衡等问题。本文结合我国农业产业化发展的趋势,提出通过引入多元化主体、推动城镇化建设、健全农村金融市场、深化税费改革等措施构建农村公共产品有效供给机制。