金属烤瓷修复体602例临床分析

目的 通过对金属烤瓷修复体的追踪检查，总结修复成功的关键要素。方法 常规牙体制备、取印模、灌模、制作暂时冠、比色、试戴、调He、粘固等系列步骤，对602例1512个牙进行金属烤瓷冠修复。结果 通过5个月至5年5个月的追踪检查，发现 其中32个修复体有瓷裂纹或瓷折裂现象(2．1％)，18个修复体边缘不太密合(1．19％)，8个修复体龈缘金属显露(0．5％)，12个修复体发生龈缘炎或龈萎缩(0．75％)，4个修复体发生牙髓炎(0．25％)，10个修复体有食物嵌塞，24个修复体色调、彩度、明度出现偏差。均未见牙颈部继发龋，松动脱落现象。结论 选择适合的基牙，采用正确的备牙方式，合理的颈缘肩台设计，准确的邻接关系，细致的比色与调He，及时制作暂时冠，能使金属烤瓷修复体取得满意的临床效果。     

金属有机化合物在光电磁材料中的应用

本文综述了金属有机化合物在光电磁材料中的应用.     

碱金属氧化物稳定性的讨论

从热力学角度对碱金属的各类氧化物的稳定性进行了讨论。     

Students' Acceptance of Tablet PCs in the Classroom

In recent years digital technologies, such as tablet personal computers (TPCs), have become an integral part of a school's infrastructure and are seen as a promising way to facilitate students' learning processes. This study empirically tested a theoretical model derived from the technology acceptance model containing key constructs developed in previous research on the acceptance of technological innovations. On the basis of the research model, it was hypothesized that students' acceptance of tablet PCs could be explained by key constructs and could be distinguished in organizational, individual, and technological factors. The survey research was conducted in three German middle schools, involving a total of 120 students. Overall, participants' attitude toward the TPC positively predicted their behavioral intention to use the TPC and as such had the strongest direct influence. The findings emphasize the importance of understanding factors affecting students' attitudes in order to manage and influence the integration of TPCs in schools.     

碱金属原子光谱精细结构

用半经典方法推得碱金属原子价电子自旋一轨道相互作用能公式、双层能级间隔公式等。从理论计算可知电偶极和电四极极化所引起的精细结构裂距很小。对n=13、l=5的量子态理论值与实验值基本相符。     

Relational competence in teacher education. Concept analysis and report from a pilot study

A supportive relationship between teachers and students has been shown to have positive effects on students’ performance and social development. Preservice teachers’ relational competence is, however, an unexplored area. The purpose of this study is to contribute to educational research about relational competence in teacher education by introducing a Swedish project which focuses on interpersonal aspects. The study has three parts. In the theoretical part, a conceptualization of teachers’ relational competence using Thomas Scheff’s theory of interpersonal relationships is outlined. In the empirical (pilot) part, a methodology for prompting preservice teachers’ analyses of teacher–student relationships is described, as well as a thematic analysis of their responses. The theoretical conceptualization is then used together with the empirical data in the third part, in order to identify development needs of preservice teachers in terms of relational competence. According to the conceptualization, relational competence includes three sub-concepts: communicative, differentiation, and socio-emotional competence. From the analysis of preservice students’ texts, the article identifies development needs in relation to the three sub-concepts. The concluding discussion focuses on lessons learned from the study regarding how to promote teacher students’ relational competence.     

金属拱型波纹屋盖加强后受力性能研究

建立了加强后的金属拱型波纹屋盖模型,利用ANSYS有限元分析软件对加强后的波纹拱进行了荷载作用下几何非线性有限元分析,并与原波纹拱进行了变形与应力的比较。计算结果表明,加强后的波纹拱对约束结构位移变形有较好的效果,且提高了结构的承载能力,这一结论为该结构进行抗风、抗雪等设计提供了有益参考。     

With permission: education policy,space and everyday globalisation in London’s east end

This paper attempts to make sense of a public–private partnership in London’s East End. I am interested in how policy directions, in terms of cultural practices, may operate as links between transnational corporations and education provision, and, additionally, how concepts of space and place provide possibilities for different understandings of educational policy change in local instances. I examine the philanthropic practices of a corporation and the practices of schools receiving this philanthropy, and suggest that these are practices of ‘everyday globalisation’ occurring as part of a specific policy direction, Excellence in Cities.     

CMOS反相器电压传输特性的分析和仿真

利用CMOS模拟电路理论,详细分析了CMOS反相器的大信号传输特性和小信号传输特性,并且给出了相应的MatLab和Pspice仿真结果.     

Apprenticeship in England – the continued role of the academic–vocational divide in shaping learner identities

Successive governments have pledged to enhance the quality of apprenticeship in Britain so as to achieve ‘parity of esteem’ with academic study. Yet, at the same time, the discourse of the academic-vocational divide has dominated the academic, policy-maker and practitioner debates. This paper draws on two recent studies designed to explore the learner identities of apprentices on different apprenticeship programmes: motor vehicle maintenance (level 2) and engineering (level 3). Through this work, we are able to explore the role of the academic–vocational divide in identity construction and to challenge assumptions about vocational learners. It will be argued, that, far from being ‘naturally practical’, the young people draw on normative discursive categories in their construction of continuous identities. The findings raise important questions about the UK apprenticeship system as currently conceived, while at the same time drawing attention to the possibility for change.