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

《Teaching and Teacher Education》2018

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.  相似文献   

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

《Teaching and Teacher Education》2018

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.  相似文献   

The impact of field experiences on prospective preservice teachers’ technology integration beliefs and intentions     

《Teaching and Teacher Education》2020

This study investigated how field experiences impacted the technology integration beliefs and intentions of prospective preservice teachers. Using structural equation modeling (SEM), a three-way interaction between the type, frequency, and quality of field technology observations predicted changes in beliefs and intentions. Beliefs about the utility of technology directly predicted intentions to use technology and intentions to use Meaningful Learning approaches to technology integration. Additionally, beliefs about technology’s importance in education indirectly predicted both variables. Positive impacts of field experiences on beliefs and intentions only existed when prospective preservice teachers saw technology used frequently by skilled teachers using Meaningful Learning approaches.  相似文献   

构建基于数据挖掘技术的客户关系管理系统     

俞鸣春  黄江燕  夏小云 《科技广场》2005,(12):51-53

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。  相似文献   

Improvement of building field association term dictionary using passage retrieval     

Uddin Md.  Elmarhomy  Elsayed  Masao  Kazuhiro  Jun-ichi 《Information processing & management》2007,43(6):1793

Field Association (FA) terms are a limited set of discriminating terms that can specify document fields. Document fields can be decided efficiently if there are many relevant FA terms in that documents. An earlier approach built FA terms dictionary using a WWW search engine, but there were irrelevant selected FA terms in that dictionary because that approach extracted FA terms from the whole documents. This paper proposes a new approach for extracting FA terms using passage (portions of a document text) technique rather than extracting them from the whole documents. This approach extracts FA terms more accurately than the earlier approach. The proposed approach is evaluated for 38,372 articles from the large tagged corpus. According to experimental results, it turns out that by using the new approach about 24% more relevant FA terms are appending to the earlier FA term dictionary and around 32% irrelevant FA terms are deleted. Moreover, precision and recall are achieved 98% and 94% respectively using the new approach.  相似文献   

企业资源型对外直接投资类型选择分析     

吴江  吕契莲 《北京工业职业技术学院学报》2006,5(4):103-107

企业对外进行直接投资时,主要方式包括跨国并购和新设投资,二者的选择是基于投资双方的具体情况而定,具体到自然资源型对外直接投资,根据博弈论的相关分析,我们认为,跨国并购将比新设投资更快、更经济的获得相关目标资产,进而实现企业预期投资目标.  相似文献   

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

Qi WANG  Xiaoxia SHEN  Tian QIU  Wei WU  Lin LI  Zhi'an WANG  Huixia SHOU 《Journal of Zhejiang University. Science. B》2021,22(2):99

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.  相似文献   

改善光纤熔接机性能的三种途径     

莫徽忠 《柳州职业技术学院学报》2007,7(2):80-82,92

简单定义了光纤熔接机的兼容性、准确性和稳定性,并提出了三种可以改善光纤熔接机性能、提高光纤熔接使用者工作效率、提高光纤接续质量和延长光纤熔接设备的使用寿命的途径.  相似文献   

基于96单片机控制的现场仪表研究     

周密 《襄樊职业技术学院学报》2008,7(2):8-10

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。  相似文献   

Technology student learning preferences and the design of flexible learning programs   总被引：1，自引：0，他引：1  

Peter J. Smith 《Instructional Science》2001,29(3):237-254

The learning preferences of three hundred and thirty eighttechnology students enrolled in sub-degree programs at an Australian institution of Technical andFurther Education were tested using the Canfield Learning Styles Inventory (CLSI). The results have been interpreted in a learning preferences framework and providesupportive evidence for the preferences factors of print-nonprint, collaborative, dependent,and autonomous learning identified by Sadler-Smith & Riding (1999). Although theresearch focussed on learning preferences the analysis also indicated support for theWholist-Analytic cognitive style proposed by Riding & Cheema (1991). Genderdifferences were shown for the Interest subscales of the CLSI. Age-group differenceswere shown for several Conditions of Learning and Modes of Learning subscales.Implications for the design of training programs, and the skillsthat may need to be developed in technology learners to enable effective use offlexible delivery, are also discussed.  相似文献