秦始皇兵马俑博物馆室内含硫颗粒物的SEM-EDX研究     

胡塔峰  曹军骥  李旭祥  董俊刚  沈振兴  Shun-Cheng Lee  Judith C.Chow  John G.Watson  容波 《中国科学院研究生院学报》2007,24(5):564-570

本文对秦始皇兵马俑博物馆室内采集的长短期降尘、大气悬浮颗粒物和彩绘漆层进行了SEM-EDX研究，在大气悬浮颗粒、短期和长期降尘中，含硫颗粒的粒径分别为0.9～22.8μm、1.0～29.0μm和1.2～37.7μm，多为石膏与粘土或石英以内部混合的状态存在。降尘中的附着型絮状硫酸钙多于大气悬浮颗粒物中，显示降尘和大气中的二氧化硫发生了累进的化学反应。彩绘漆层表面的坑和裂隙附近观察到原位生长的硫酸钙晶体，显示漆层材料或降尘颗粒物与大气二氧化硫之间的酸化学反应，可能是彩绘漆层表面受侵蚀形成微小坑和裂隙的原因之一。  相似文献   

An introduction to Error-correcting Codes : by Shu Lin. 330 pages,diagrams, 6 x 9 in. Englewood Cliffs,N.J., Prentice-Hall, 1970. price, $12.95.     

David K. Chow 《Journal of The Franklin Institute》1972

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Analysis of STEM Activities in Primary Students’ Science Projects in an Informal Learning Environment     

Winnie Wing Mui So  Ying Zhan  Stephen Cheuk Fai Chow  Chi Fai Leung 《International Journal of Science and Mathematics Education》2018,16(6):1003-1023

This study adopted a researcher-generated framework to analyze STEM activities demonstrated in primary students’ science projects in an annual extracurricular event held in Hong Kong. Ten students’ project reports were randomly selected from each of the three groups of 24 outstanding, 45 merit, and 68 consolation awarded projects. Content analysis was conducted to code the activities in each project. The coded information was then changed into numerical data for quantitative analysis. The results showed that, in general, more engineering and science activities than technology and mathematics activities were adopted by the primary students in their projects. More projects with the Outstanding Award conducted STEM activities than those projects with Merit and Consolation Awards, and significant group differences existed in the science and mathematics activities. Besides, science activities significantly positively related to engineering and mathematics activities. Furthermore, STEM-related content knowledge of discipline core ideas and crosscutting concepts were reported. This study sheds light on the pattern of STEM activities in students’ science projects, and has implications for promoting STEM integration in primary education.  相似文献   

Creative literacy activities promote positive reading attitude in children learning English as a foreign language          下载免费PDF全文

Bonnie Wing‐Yin Chow  Anna Na Na Hui  Barbie Hiu‐Tung Chui 《Journal of Research in Reading》2018,41(2):278-289

This study investigated the effects of creative literacy classroom activities on the acquisition of English as a foreign language. Ninety Chinese second graders were tested on reading attitude and English receptive vocabulary knowledge. They were randomly assigned to either a control group or an experimental group, which engaged in English creative classroom activities for 10 weeks. Repeated measures analyses showed a significant interaction effect for reading attitude, providing empirical evidence that English creative classroom activities can enhance reading attitude. This study extends past research by demonstrating the links between creative activities and reading attitude, as well as highlights the feasibility of incorporating creative literacy activities within foreign language education. This provides a new direction for researchers and educators to develop instructional practices that incorporate a stimulating environment for English‐as‐a‐foreign‐language students. Future longitudinal research could examine whether these benefits can be maintained over a longer period.  相似文献   

Desiring TESOL and international education     

Lee-Tat Chow  Peidong Yang 《International Studies in Sociology of Education》2019,28(2):200-205

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Communicating feedback in teaching practice supervision in a learning-oriented field experience assessment framework     

Sylvia Yee Fan Tang  Alice Wai Kwan Chow 《Teaching and Teacher Education》2007

This article seeks to understand the ways in which feedback was communicated in post-observation conferences in teaching practice supervision within the learning-oriented field experience assessment (LOFEA) framework. 32 post-observation conferences between 21 pairs of supervisors and participants of in-service teacher education programmes, and interviews with supervisors and participants were analyzed, with findings revealed in four themes:

1.

The distribution of content and nature of feedback in post-observation conferences;  相似文献   

从植物化学成份的比较看单子叶植物的起源问题     

杨崇仁  周俊 《中国科学院研究生院学报》1978,16(1):1-9

  通过对单子叶植物和毛茛科以及”睡莲目”植物中生物碱、甾体化合物、三萜化合物、氰甙 和脂肪酸等五类化学成份的比较分析，作者认为毛茛科与百合目有着密切的亲缘关系，因而支 持单子叶植物毛茛—百合起源的主张，不赞同苏联学者Takhtajan关于单子叶植物莼菜—泽泻起源的观点。  相似文献   

Desegregation with Reluctance: the Boston School System     

Peter CM Raggatt 《Compare》1976,6(2):10-13

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Research engagement and educational decentralisation: problematising primary school English teachers’ research experiences in China     

Xuesong Gao  Gary Barkhuizen  Alice Wai Kwan Chow 《Educational studies》2011,37(2):207-219

Teachers are encouraged to enhance professional competence through reflective practice and they are also asked to undertake research to generate evidence for their professional practices. This paper reports on an inquiry into a group of primary school English language teachers’ research engagement in the province of Guangdong on the Chinese mainland. The inquiry explored the effect of educational reforms on the participants’ research engagement through the use of an open‐ended questionnaire and group interviews. The inquiry revealed that research engagement had become an important part of the teachers’ professional lives. Emerging findings from the inquiry also problematised their research engagement as it was found to have been undermined by a competitive promotion mechanism, the teachers’ conceptualisations of research and challenges in the knowledge dissemination process. The paper ends with reflections on how to make teacher research “educational” for teachers and serve as an effective way for professional development.  相似文献   

Online homework impact in undergraduate mathematics and business statistics courses     

Alan F. Chow 《Educational studies》2015,41(3):244-248

This evaluation examines the impact on student success rates related to changes in instructional programmes in undergraduate mathematics and statistics courses. Success for students taking courses with a computer-based homework component was compared with success of students who took the course in prior semesters without the computer-based component. Graphical and analytical tools are used to compare results. Results come from multiple semesters of each type of homework application, for both pre-calculus algebra and business statistics courses. Students whose performance is utilised in this study are undergraduate students taking introductory level college mathematics or business statistics courses, with mostly no prior instruction at this level. Comparing the success of the intervention group with the success of the baseline control group, findings support that the students using the computer-based homework instruction are just as successful as those using the traditional method of homework instruction. Utilising the online homework applications, provide several important advantages in today’s universities, including the reduced time for faculty grading, consistency of graded assignments across all sections of a course and most importantly, immediate feedback for students.  相似文献