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.     

A ghetto land pedagogy: an antidote for settler environmentalism

A ghetto land pedagogy begins with two axioms that align it with land education more broadly, and that distinguish it from the general umbrella of environmental education. First, ghetto colonialism is a specialization of settler colonialism. Second, land justice requires decolonization, not just environmental justice. A ghetto land pedagogy thus attends to an analysis of settler colonialism, offers a critique of settler environmentalism, and forwards a decolonizing cartography as a method for land education. This article discusses ‘storied land’ as a critical cartographic method for land education, illustrated through a discussion of land in the San Francisco Bay Area.     

~(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.     

连续退火生产线中卷取机张力控制研究

基于卷取机在连退生产线的重要性,分析卷取机的机械结构,研究卷取机的控制系统。通过实际应用,说明采用间接张力控制的最大转矩法来实现卷取机系统的恒张力是有效的。     

Causality dilemma: creating a twenty-first century university archive

For its fifteenth anniversary, the Jay Sexter Library at Touro University Nevada (TUN) sought ways to capture its institutional history by founding an archive. Among many challenges, the library struggled to convince the administration of the importance of an archive. To generate interest in TUN''s history, a task force comprising library, executive administration, and advancement staff hosted and recorded a panel event with some of the university''s original faculty, staff, and administration. By having this event, new TUN employees were able to experience the shared knowledge of TUN''s early days, and the library was able to create and preserve its own institutional history.     

Validating students' library experience survey using rasch model

Few studies have investigated the psychometric property of new instruments developed locally to assess students' library experience, such as their behavior, perception and attitude toward library use. Validating a survey instrument is critical because using untested assessment instruments is more likely to lead to a lack of credibility in the results, as well as a lack of accuracy in the study's purpose (Sullivan, 2011). This study used data from a locally developed student library experience survey distributed in Spring 2018 at a large public research university library to examine undergraduate and graduate students' behaviors, attitudes and perceptions of library use. To test the validity of the survey as to whether six subdomains of the library experience survey contributed to a single construct, library experience, the study used Rasch model framework. This study contributes to the field as a first example using the Rasch model for library assessment purposes. Suggestions for best practices are discussed.