超等长式俯卧撑练习对推铅球技术和成绩的影响

为解决普体铅球课进行身体训练受学校场地、器材设备限制的困难，选用超等长式俯卧撑练习作为训练手段，通过实验与对照的方法，发现超等长式俯卧撑练习可有效地挖掘学生自身爆发力的潜在素质，迅速提高铅球成绩，并对推铅球最后用力出手时易产生的“掉肘”错误动作有明显的纠正作用。     

对我国篮球中锋队员身体对抗接触的初步研究

现代篮球运动发展迅速、比赛紧张激烈，技术特点是：快速、准确、对抗性强。特别是持球队员无论是运球突破，还是投篮，都必须在身体对抗的情况下完成动作。不敢对抗、不能对抗的技术，根本不能适应现代篮球比赛的需要。身体接触性对抗是篮球运动诸多因素中的主要矛盾。针对中锋在比赛中的特殊地位和重要职责，对现代优秀中锋进攻特点加以研究，为今后中锋教学和训练提供参考。     

焦虑现象对"技术练习"效果影响的实验研究

通过排球技术与对不同练习氛围中的焦虑现象进行实验研究与探讨,表明练习者的状态焦虑水平对练习效果影响较大.     

十项全能运动成绩的动态变化趋势外推预测研究

依据第七届全国大学生田径锦标赛男子 B组十项全能比赛资料 ,运用较为科学合理的方法 ,建立十项全能多元回归预测模型。运用此模型不仅对我国大学生运动员 ,而且对中外优秀十项全能运动员的各单项运动成绩的动态变化趋势外推的预测值与实际值呈高度相关、准确性高且无差异性     

Radiography of paintings: Limitations of transmission radiography and exploration of emission radiography using phosphor imaging plates

Radiography in transmission mode is a well-established technique to visualize the internal structure of paintings. However, for many paintings the pictorial layer cannot be clearly visualized with conventional radiography because of interference from paint on the reverse, the material composition or the regular structure of supports or subsurface layers. Traditional lead white grounds in particular cause specific imaging problems not encountered with more modern white pigments such as zinc and titanium whites. A solution to this problem is radiography in emission mode. This study demonstrates and articulates those factors that can interfere with visualization of a painting's pictorial layer using transmission radiography as well as those that contribute to the effectiveness of emission radiography in visualizing such information. While emission radiography has been applied to the examination of paintings for over half a century, it is a cumbersome technique that is further complicated by the need to work under dim safelight illumination when X-radiographic film is used. Therefore, the use of computed radiography using storage phosphor imaging plates for emission radiography was also investigated.     

~(133)Cs胁迫对转IrrE油菜生理活性的影响

以转IrrE基因油菜为材料,以非转基因油菜为对照,砂培条件下研究了油菜对Cs的积累吸收情况和Cs胁迫对油菜SOD、POD酶活性、MDA含量及游离脯氨酸含量的影响.结果表明:随着处理浓度的增大,转基因油菜和非转基因油菜对Cs的吸收量都增大,二者根部的吸收量都大于其地上部分;转基因油菜根部的积累量大于非转基因油菜根部的量,而地上部分积累量小于非转基因油菜的含量;在不同Cs浓度的胁迫下,转基因和非转基因叶片的SOD和POD活性均呈现先升后降的趋势,4种Cs浓度处理下转基因油菜活性都高于非转基因油菜;转基因和非转基因油菜叶片的MDA含量均呈上升的趋势,但转基因油菜体内的MDA含量都低于非转基因油菜;4种处理下油菜叶片脯氨酸含量也表现出上升趋势,而转基因油菜产生的游离脯氨酸高于非转基因产生的.以上结果说明在油菜受到Cs胁迫时,转IrrE基因油菜比非转基因油菜更具有Cs胁迫耐受性.     

Do Interpersonal Networks Mediate the Relationship Between International Academic Mobility and Entrepreneurial Knowledge?

Temporary international mobility is an increasingly relevant practice amongst academics. However, current literature lacks understanding on whether such mobility influences the individual academics’ entrepreneurial knowledge. This paper hypothesizes that temporary international academic mobility is conducive to the academic’s entrepreneurial knowledge and that interpersonal social networks play a crucial role in the transfer of this knowledge through their strength and size properties. We perform a Partial Least Squares - Structural Equation Model and build upon an original survey data set collected amongst 281 Chinese academics. We find that the size of one’s interpersonal social network fully mediates the relationship between international academic mobility and entrepreneurial knowledge. This result points to the importance of a structurally broad - rather than a relationally strong - international social network in the academic’s accumulation of entrepreneurial knowledge abroad.

     

Inequality in language achievement growth? An investigation into the impact of pupil socio‐ethnic background and school socio‐ethnic composition

This paper investigates how pupils' growth trajectories in three language domains (reading fluency, spelling, and reading comprehension) are related to their own socioeconomic and ethnic background and to the socioeconomic and ethnic composition of their primary school. Using multilevel piecewise growth curve analysis, the growth trajectories of approximately 5000 pupils from 170 primary schools were estimated. The results indicate that a pupil's socioeconomic and ethnic backgrounds have the largest impact on achievement and growth in reading comprehension and the smallest impact on reading fluency. Furthermore, school ethnic composition—but not socioeconomic composition—was related to pupils' achievement in all three language domains at the first measurement occasion, though none of the types of school composition was related to growth. The research findings therefore imply that to combat the deficits in language proficiency often found in ethnic minority pupils, priority should be given to investments in individual intervention programmes over policy plans to desegregate schools. Moreover, our study identifies the specific points in time during primary school at which intervention programmes are needed the most.     

The Impact of Personality,Goal Orientation and Self-Efficacy on Participation of High School Teachers in Learning Activities in the Workplace

This study examines the influence of personality traits, goal orientation and self-efficacy on high school teachers’ participation in learning activities in the workplace (i.e. experimentation, informal interaction with colleagues, self-regulation and avoidance behaviour). A convenience sample of 95 teachers from six high schools in Flanders (Belgium) participated in this exploratory study. They completed a questionnaire consisting of different instruments to map their personality (NEO-FFI), goal orientation (adaptation of Achievement Goal Questionnaire), self-efficacy (Teachers’ Sense of Efficacy Scale) and participation in learning activities (adaptations from different scales). Results of multivariate regression analyses indicate that conscientiousness, extraversion and openness have a positive effect on teachers’ participation in learning activities in the workplace. However, learning orientation and self-efficacy are found to be better predictors for participation in experimentation, informal interaction and selfregulation. Analysis using structural equation modeling reveals an indirect relationship between extraversion and self-regulation, mediated by self-efficacy. Learning orientation mediates the impact of conscientiousness on informal interaction. As teachers’ goal orientation and self-efficacy can be influenced, school policy makers should reflect upon ways on how teachers’ goal orientation and self-efficacy can further be enhanced.