范德瓦耳斯气体的临界指数β=1/3

从范德瓦耳斯气体的对比态方程出发,推导出临界指数的数值为1/3,与实验值相近。     

Instructional methods and languages in class: A comparison of two teaching approaches and two teaching languages in the field of intercultural learning

The article presents the results of a quasi-experimental intervention study with a 2 × 2 factorial design. We implemented a problem-based intercultural learning unit in four secondary schools (grades 9 to 12) and varied the teaching approach (analytical/affective-experiential) and the language of instruction (German/English). The learning unit covered six 45-min lessons and was conducted in nine school courses (n = 143). Five additional school courses (n = 66) served as a control group. In all experimental groups, students engaged with critical incidents. These were either analysed (analytical focus) or acted out as role plays (affective-experiential focus). In addition, students analysed film clips (analytical focus) or participated in a simulation game (affective-experiential focus). The experimental groups outperformed the control group in the post-test, which required the analysis of critical incidents. Both teaching approaches were equally effective; however, students evaluated affective-experiential learning more positively. Using a foreign language for teaching did not impair performance.     

带变量核的抛物型Littlewood-Paley算子在Hardy空间上的有界性

利用原子分解理论给出了一类带变量核的抛物型Littlewood-Paley算子gφ在Hardy空间Hp(Rn)(2α/2α+1相似文献   

批评语篇分析概述

文章综述了批评语篇分析在国内外的发展状况,并列举了其中的代表人物以及他们的主要贡献。最后对其在国内外的发展状况作出评价,并预测批评语篇分析的研究前景。     

基于批判性思维和创造力的我国大学生信息素养教育模式研究

信息素养、批判性思维、创造力是21世纪大学生必需掌握的核心技能,研究并揭示三者的内在影响机制,对于促进高等教育信息素养教育观念的转变,制订信息素养标准,进而优化信息素养教育模式,具有重要意义。本文采用问卷调查方法获取我国大学生信息素养、批判性思维能力和创造力状况的基本数据。通过回归分析和中介效应分析发现:信息素养、批判性思维对创造力影响显著,批判性思维在信息素养对创造力的影响中存在显著中介效应。通过路径分析发现:信息评估能力和信息利用能力通过批判性思维的中介作用更能促进创造力,信息素养通过分析能力和系统化能力更能够激发创造力,信息搜索能力通过系统化能力能够最大程度激发创造力;信息搜索能力、信息评估能力、信息利用能力是信息素养的核心能力,分析能力、系统化能力是批判性思维的核心能力。研究结果表明:在信息素养教育中融合批判性思维的培养能较大程度地提高大学生的创造力。根据调研结果及相关理论研究,本文提出融合批判性思维的信息素养教育与专业课程教育的整合模式,即ILi CTi C模式,并提出实现该模式的系统方案,以期为推进我国大学生信息素养教育提供参考。     

一个混合类的Hilbert型不等式

引进一对共轭指数（p,q）,给出了一个带最佳常数因子的混合类Hilbert型不等式及其等价式．     

‘Upturned participation’ and youth work: using a Critical Utopian Action Research approach to foster engagement

ABSTRACT

This article reflects on how participatory processes inspired by action research hold a genuine potential for developing social educational work in a more democratic way. We present our concept of ‘Upturned Participation’, which is built upon the methodological framework of Critical Utopian Action Research. First Critical Utopian Action Research is introduced briefly, including a presentation of the core method of the action research approach. We then present an extract from an action research project aimed at creating space for participation for marginalized young people in the area of Copenhagen. On this basis, we reflect on how the ideas of the young people could influence the field of social work. The article addresses contemporary challenges and opportunities for creating development in the field of youth work or social work through participatory processes with marginalized young people.     

凹透镜的会聚与发散

本文研究了影响凹透镜成像而产生会聚作用的几种因素，如介质折射率、透镜球面曲率半径等；给出了薄凹透镜发散／会来临界角；辅助透镜临界物距与两透镜焦距、两透镜距离的关系，从而澄清了凹透镜不能会聚产生实像的概念及产生实像的实质。     

Matters of Form: Questions of Race,Identity, Design,and the U.S. Census

This case examines how functionalist approaches manifest culturally based on users’ contexts. The authors conduct a critical visual semiotic analysis of the race and Hispanic origin questions on the 2010 U.S. Census form, demonstrating how incongruities in design potentially harm people. This demonstrates a need for adding critical analyses to design and research and it refocuses the Society for Technical Communication’s value of promoting the public good on to design and documentation in order to fight injustice.