Boundary Crossing and the Professional Learning of Teacher Educators in New International Contexts

In this collaborative self-study, two teacher educators examine their experiences of working in new international contexts and the impact of those experiences on their professional learning and identities. Mandi moved from a major research university in one country to another, while Judy co-led a group of pre-service teachers on an international practicum for three weeks each year for three years. Using the concept of boundary crossing as a theoretical and analytical framework, each teacher educator identified a boundary-related critical incident or experience that occurred during her work in new international contexts. Through individual and collaborative analysis of their critical incidents, they found that working as a teacher educator in new international contexts involves the crossing and re-crossing of multiple personal, professional, linguistic and cultural boundaries. Working in these boundary spaces involved learning how to negotiate new kinds of relationships with colleagues and students, manage changed roles and responsibilities and, ultimately, a search for a renewed sense of self, as each sought to understand herself differently within a new professional context.     

福柯“异质空间”概念对当代电影批评的意义

福柯提出的“异质空间”概念当代电影批评具有独特的理论价值。本文内容分为三个部分：第一是文化研究者对异质空间的不同阐述和理解，第二是异质空间概念对艺术批评的意义，第三是异质空间概念对当代电影批评的意义。     

Banach空间中强可测函数的选择定理

讨论了Banach空间上强可测函数的选择定理,由此定理得到一个Banach空间自反的充要条件及其它一些有趣的结果,这些结果可用于Banach空间上最优控制问题的研究     

Hilbert空间上最小二乘解的等价条件及其应用

给出了Hilbert空间上最小二乘解的等价条件,对最小二乘法的应用作了初步探讨。     

《广义度量空间与映射》的正则性

正则性是拓扑学中熟知的分离公理． 分析了著作《广义度量空间与映射》中的正则性条件, 获得了若干Ｔ２ 空间中的广义度量定理, 构造了几个反例说明某些众所周知的结论中正则性是必不可少的, 提出了一些尚未解决的问题供探讨．     

Science notebooks as interactional spaces in a multilingual classroom: Not just ideas on paper

Past studies have explored the role of student science notebooks in supporting students' developing science understandings. Yet scant research has investigated science notebook use with students who are learning science in a language they are working to master. To explore how student science notebook use is co-constructed in interaction among students and teachers, this study examined plurilingual students' interactions with open-ended science notebooks during an inquiry science unit on condensation and evaporation. Grounded in theoretical views of the notebook as a semiotic social space, multimodal interaction analysis facilitated examination of the ways students drew upon the space afforded by the notebook as they constructed explanations of their understandings. Cross-group comparison of three focal groups led to multiple assertions regarding the use of science notebooks with plurilingual students. First, the notebook supported student-determined paths of resemiotization as students employed multiple communicative resources to express science understandings. Second, notebooks provided spaces for students to draw upon diverse language resources and as a bridge in time across multiple inquiry sessions. Third, representations in notebooks were leveraged by both students and teachers to access and deepen conceptual conversations. Lastly, students' interactions over time revealed multiple epistemological orientations in students' use of the notebook space. These findings point to the benefits of open-ended science notebooks use with plurilingual students, and a consideration of the ways they are used in interaction in science instruction.     

具有光滑核的分数次积分算子的交换子的Besov估计

讨论了Besov函数与具有光滑核的分数次积分算子生成的交换子b,TΩ,α在哈代空间上的连续性,得到如下结论：当b∈∧p,q^B,Ω（x）∈C^1（R^n）时,在一定条件下,证明了b,TΩ,α是从H^d（R^n）到L^r（R^n）有界的。     

自反Banach空间中多目标博弈平衡点存在性

在自反Banach空间给出了较弱条件下的多目标博弈平衡点存在性定理．     

等价类空间上投影算子的一些性质

应用算子矩阵和算子分块技巧,研究了具有相同等价类的子空间的一些性质.分别获得了等价类dimgM和dimgN,投影算子PM和PN,以及访投影算子的谱之间的一些关系.