Early career teachers’ sense of professional agency in the classroom: associations with turnover intentions and perceived inadequacy in teacher–student interaction

Teachers’ capacity to learn intentionally and responsively in the classroom is particularly vulnerable during the first years in the profession. This study investigated the interrelations between early career teachers’ turnover intentions, perceived inadequacy in teacher–student interaction, and sense of professional agency in the classroom. The survey data were collected from 284 in-service teachers with not more than 5 years of experience and analysed by structural equation modelling (SEM). The results showed that the negative relation between turnover intentions and early career teachers’ sense of professional agency was completely mediated by perceived inadequacy in teacher–student interaction. The results indicate that experiences of insufficient abilities to solve pedagogically and socially challenging student situations have a crucial effect on early career teacher’s capacity for adaptive reflection and active transformation of instruction.     

超积累植物在治理土壤重金属污染中的应用

超积累植物具有超量吸收、积累某些化学元素的能力 ,将它用于净化土壤重金属污染 ,具有传统方法无法替代的优点     

金属中自由电子气能量的研究

本文根据费米气体模型理论,研究金属中自由电子气的能量,讨论电子的最高能量、平均能量和电子气的能级密度.     

Positive teacher–student relationships go beyond the classroom,problematic ones stay inside

The authors voice teachers' perceptions of their interpersonal experiences with students in both positive and problematic relationships. Interview data from 28 teachers were examined by coding utterances on teacher and student interactions. Results indicate that teachers defined the quality of the relationship mostly by the level of communion (friendly vs. hostile), instead of by the level of agency (in control vs. powerless). Analyses of mentioned teacher and student behavior show a friendly interactional pattern for positive relationships and a hostile pattern for problematic ones. In teachers' perceptions, positive and problematic relationships also differed in context where encounters take place and topic of talk. Contrary to interactions in problematic relationships, encounters in positive relationships were mostly situated outside the classroom context and conversations during these encounters covered a wide range of topics. Implications for teacher education programs are discussed.     

腐蚀钼阴极尖端溶液的配制

报导了一种配制腐蚀阴极尖端溶液的方法，用这种方法配制的溶液来腐蚀钼阴极尖端，得到了尖端曲率半径为0．1——0．6μm，这样的阴极尖端其发射特性能够满足我们用这种金属（钼）树料来制作阴极尖端的要求。     

Reporting from the Frontline

This paper focuses on the war correspondents traveling in the Balkans during the period of the Balkan Wars (1912–1913) to cover military campaigns. It tries to explore the paths of information, the mechanisms of propaganda and the restrictions used by the Balkan states to control the content of the news transmitted. The Balkan Wars were among the first military events covered so extensively by newspapers all around the world. In the battle-fields the principles of the new field of journalism were highly tested. The lessons learnt in the Balkans during the Balkan Wars proved to be productive and useful for the improvement of the relationship between war correspondents and military authorities.     

过渡金属配合物构型畸变探究

分析了八面体配合物和四面体配合物畸变的原因,给出了判断八面体配合物和四面体配合物畸变的一般方法:配合物是否发生畸变要看中心离子电子云是否对称分布,若对称分布,就具有规则的八面体或四面体构型,否则,将会发生变形.     

模糊数学对哈尔滨市新老工业区土壤重金属污染对比研究

以哈尔滨市新老工业区土壤重金属污染为研究对象,对新老工业区土壤中的Cu、Pb、Zn、Cd、Cr和Ni等6种重金属元素进行了分析测定,采用模糊数学模型对新老工业区土壤重金属污染进行对比研究。研究结果表明,对照松嫩平原土壤背景值,研究区域重金属污染较严重,老工业区土壤环境质量为III级,新兴工业区为II级。该研究力图反映经济社会的发展对土壤环境不同的影响,为哈尔滨市工业区合理布局及土壤重金属防控提供科学依据。     

Reasons of students and apprentices to choose a training company in the dual system

This article sheds light on an understudied aspect of the transition from school to work: the choice of a training company. It presents findings from qualitative interviews with 69 secondary school students and apprentices from the German states of Berlin and Brandenburg, focusing on their reasons to choose a training company in the dual system. What reasons lead students and apprentices to choose a training company? The most common reason is personal impressions, which future apprentices obtain in their initial, personal encounters with a company and its staff. Students and apprentices often consider location, working atmosphere and soundness. Due to this study’s regional scope, its findings may not be fully generalisable on a national or international level. However, its findings may instigate further research in countries where people pursuing certain types of apprenticeship training have to apply to companies (e.g. Great Britain, Switzerland and Australia).