Reconsidering the use of video clubs for student-teachers' learning during field placement: Lessons drawn from a longitudinal multiple case study

Although video clubs have been used to support (student) teachers' learning through reflection upon practice, less attention has been paid to their potential use for supporting changes in participants' practice over a period of time. Prior work has also largely treated (student) teachers as an undifferentiated whole that benefits in similar ways from video clubs. In this study, we problematize this assumption by drawing on three cases of student teachers to exemplify three different learning paths while participating in a video club during field placement. Reflecting on these findings, we discuss implications for differentiating the video-club approach to address different student teachers.     

Dialogic processes that enable student teachers' learning about pupil learning in mentoring conversations in a Lesson Study field practice

This study investigates dialogic processes in student teachers' mentoring conversations in field practice, where Lesson Study (LS) was used as a context for establishing a dialogic learning community in one student group in science. We apply an analytical framework associated with Sociocultural Discourse Analysis to identify utterances that have the potential to create a dialogic space and contribute to ‘interthinking’ among the participants. The findings show the important role of the mentor teacher as a facilitator and a ‘knowledgeable other’, challenging the student teachers to reflect on chosen activities using predictions and detailed observations related to pupils' learning.     

简析《进涌的流泉》的叙事结构

《迸涌的流泉》是德国当代作家马丁·瓦尔泽的最令人信服的一部小说。本文尝试从米克·巴尔的故事顺序安排理论角度出发,分析《迸涌的流泉》的叙事结构,尤其分析了时间顺序偏离时或错时时呈现的三种形态,以解密《迸涌的流泉》的叙事特色。     

基于96单片机控制的现场仪表研究

现场总线（Fieldbus）是一种全数字化、双向、多站的通信系统。开放性、分散性与数字通讯是现场总线系统最显著的特征。CAN总线是现场总线中比较容易实现、价格低廉的一种．其性能却不比其他现场总线差,在众多领域被广泛应用。基于96单片机控制的现场仪表就是基于CAN总线的现场仪表。概述了现场总线和CAN总线的发展以及技术特点,并给出具体的软硬件设计。     

基于免疫算法和人工势场的移动机器人路径规划

分析了人工势场模型存在的两个问题:目标不可到达问题和由于局部最优解的存在而产生的死锁问题。在人工势场路径规划的基础上,提出了基于免疫算法和人工势场法的最优路径规划方法。通过仿真算例验证了该模型的有效性。     

Evaluation and application of an efficient plant DNA extraction protocol for laboratory and field testing

Nucleic acids in plant tissue lysates can be captured quickly by a cellulose filter paper and prepared for amplification after a quick purification.In this study,a published filter paper strip method was modified by sticking the filter paper on a polyvinyl chloride resin(PVC)sheet.This modified method is named EZ-D,for EASY DNA extraction.Compared with the original cetyl trimethylammonium bromide(CTAB)method,DNA extracted by EZ-D is more efficient in polymerase chain reaction(PCR)amplification due to the more stable performance of the EZ-D stick.The EZ-D method is also faster,easier,and cheaper.PCR analyses showed that DNA extracted from several types of plant tissues by EZ-D was appropriate for specific identification of biological samples.A regular PCR reaction can detect the EZ-D-extracted DNA template at concentration as low as 0.1 ng/μL.Evaluation of the EZ-D showed that DNA extracts could be successfully amplified by PCR reaction for DNA fragments up to 3000 bp in length and up to 80%in GC content.EZ-D was successfully used for DNA extraction from a variety of plant species and plant tissues.Moreover,when EZ-D was combined with the loop-mediated isothermal amplification(LAMP)method,DNA identification of biological samples could be achieved without the need for specialized equipment.As an optimized DNA purification method,EZ-D shows great advantages in application and can be used widely in laboratories where equipment is limited and rapid results are required.     

构建基于数据挖掘技术的客户关系管理系统

随着企业对客户关系管理的愈加重视，数据挖掘技术已成为实现客户关系管理的重要手段。本文介绍了客户关系管理系统和数据挖掘相关技术，并结合保险业的特点。分析了数据挖掘技术在保险CRM中的应用案例，指出了其商业价值。     

论图书馆开放式读者服务的"场效应"

开放式图书馆的读者服务是一种优质服务，同时又有一种“场效应”。这种“场效应”既具有主体教育功能，也能够培养主人翁(主体)精神，同时还能够培育平等和谐的服务关系。因此应该大力弘扬这种服务理念。     

我国概念图研究概览

文章统计了1985.1—2005.6我国学者在概念图方面所发表论文的数目,分析了概念图研究的范域和成果,归纳了国人在概念图方面的研究特点与不足。     

"小康" 含义之历史变迁

中国古时之“小康”不外有三重含义：一曰生活稍有所安,一曰“家天下”之礼治杜会,一曰家境相对宽裕。近世又有康有为之小康社会理想,旨在建立资产阶级君主立宪政体。“小康”之用诸现代,是邓小平对古人用于指谓物质生活水平的“小康”概念的革命性再造。中共十六大提出的“全面建设小康社会”是对邓小平当初提出的建设“小康”或“小康社会”之含义的最新丰富和发展。现代小康社会理想根本不同于古代和近世的小康社会理想;现代小康生活亦根本不同于古人囿于自然经济的狭隘条件所向往的“小康之家”。