生物化学综合性实验的探索与评价   总被引：2，自引：0，他引：2  

杜金友  蔡爱军  齐艳玲  邹亚学  秦玲  杨晴  耿立英  关学敏 《实验技术与管理》2011,(8)

以河北科技师范学院2005级生物科学、生物技术专业学生为样本,通过对生物化学综合性实验效果的调查,说明综合性实验在突出学生主体地位、激发学生兴趣等方面起到了积极的作用,能够在培养学生团队合作精神、科研能力等多方面综合能力的提升。  相似文献   

扩招背景下提高实践教学质量的方法研究与实践     

官颂  张鹏  董艇舰  韩勇  魏国  朱江  潘亚东 《实验技术与管理》2011,28(8)

探讨了扩招背景下工程训练实践教学面临的机遇和挑战,对工程训练中提高教学质量的方法和途径进行了研究,提出了通过构建工程训练体系、实践教学保障体系和考核评价体系提高实践教学质量的思路,并结合整个教学团队的工作实践,阐述了在实践教学中的应用情况.  相似文献   

开放物理实验教学模式的探索与实践   总被引：3，自引：2，他引：1  

关寿华  郑建洲  张萍 《实验技术与管理》2011,28(Z1)

在广泛调研和总结经验的基础上,对大学物理实验开放教学模式进行了深入研究,形成比较可行的大学物理实验课程开放教学模式.通过设立创新工作室、网络实验室以及教学内容分层次等措施,实现了实验室硬件资源,实验教学活动在时间、空间和实验内容的深入开放,基本弥补了传统实验教学模式的不足.  相似文献   

Investigating the relationship between pre-service physics teachers' professional knowledge,self-concept,and interest     

Stefan Sorge  Melanie M. Keller  Knut Neumann  Jens Möller 《科学教学研究杂志》2019,56(7):937-955

This study investigates the relationships between professional knowledge, self-concept, and interest of pre-service physics teachers. In order to support student learning and interest development alike, teachers need a profound professional knowledge and respective motivational orientations. Developing both professional knowledge and motivational orientations in teachers is therefore a key challenge of teacher education. Prior research has focused on the development of content knowledge (CK) and pedagogical content knowledge (PCK) within teacher education, but the role of motivational orientations such as self-concept and interest have mostly been neglected areas of study. As individuals develop domain-specific motivational orientations, they compare their achievement in an external frame to the achievement of their peers, and they compare their achievements in an internal frame across domains. The effects of these psychological processes on domain-specific motivational orientations are described by the generalized internal/external frame of reference model (GI/E model). We assessed the professional knowledge (CK and PCK) and motivational orientations (self-concept and interest) of N = 200 pre-service physics teachers from 12 teacher education institutes in Germany. To investigate the predictions of the GI/E model, we utilized structural equation modeling. In line with the GI/E model, the analysis revealed that pre-service teachers use social comparisons. Pre-service teachers with a higher CK/PCK also showed a higher CK/PCK self-concept. We also identified instances of internal comparisons as we found that a high level of CK corresponds with a lower PCK self-concept. While we could not identify the same effects from professional knowledge on interest, self-concept mediated the effects from professional knowledge on interest. The results suggest that interdependencies between professional knowledge and motivational orientation should be given more consideration in teacher education research and should also be addressed more explicitly in teacher education.  相似文献   

Gender differences in mathematics and science competitions: A systematic review     

Anneke M. Steegh  Tim N. Höffler  Melanie M. Keller  Ilka Parchmann 《科学教学研究杂志》2019,56(10):1431-1460

Gendered patterns in mathematics and science interest emerge in early childhood, develop over time, and ultimately reflect advanced course selection in secondary education. During the crucial time adolescents become aware of their strengths and interests and specialize accordingly, they get the opportunity to participate in out-of-school learning programs such as mathematics and science competitions. This raises the question whether mathematics and science competitions contribute to gender equity by equally promoting female and male interests. In this article, we present a systematic review on gender differences and the mechanisms explaining success and failure in mathematics and science competitions. On an international level, we found large gender differences regarding participation in all Olympiads with the exception of the biology Olympiad. In fairs and national Olympiads, overall participation rates were not gendered as such, but females preferred biology topics whereas males preferred physics related topics. Male and female achievement in fairs was comparable, but males clearly outperformed female participants at the Olympiads, with the smallest differences in the biology Olympiad. Variables and theoretical frameworks explaining participation and achievement and the role of gender in mathematics and science competitions are discussed. We suggest that gender stereotypes, through their influence on self-concept and interest, play an important role in the mechanisms resulting in low female participation rates in and beyond mathematics and science competitions (especially in physics and chemistry). The mechanisms we found explaining female representation during a national selection competition might be considered as reflecting those in female mathematics or science careers and could thus serve as food for thought on countering the gender gap in mathematics and science.  相似文献   

探索高校实验室大型仪器设备管理新模式   总被引：4，自引：0，他引：4  

关丽萍  宋皓 《中国现代教育装备》2011,(1):21-23

高等学校大型仪器设备是从事教学、科研的重要条件和基本手段,是学校综合实力的体现。随着现代科学技术的迅猛发展,知识在经济发展中起到越来越重要的作用,使得高校大型仪器设备的管理显得尤为重要。结合工作实践,以及对目前高校实验室大型仪器设备管理及使用现状的分析,提出了加强高校大型仪器设备管理,提高大型仪器设备使用效率的若干措施。  相似文献   

关于Mordell方程y^2=x^3＋k     

管训贵 《山东教育学院学报》2011,26(5):117-118

设l,l1,l2,…,ls为任意整数,n为正整数,n1,n2,…,ns为任意非负整数．用初等数论方法证明了：如果k满足k=（4l＋2）^3-Пi=1^s（4li＋1）^2ni或k=（4l＋3）^3-2^2nПi=1^s（4li＋1）^2ni,则Mordell方程y^2=x^3＋k无整数解．  相似文献   

Enabling Mg metal anodes rechargeable in conventional electrolytes by fast ionic transport interphase     

Ruijing Lv  Xuze Guan  Jiahua Zhang  Yongyao Xia  Jiayan Luo 《国家科学评论(英文版)》2020,7(2):333

Rechargeable magnesium batteries have received extensive attention as the Mg anodes possess twice the volumetric capacity of their lithium counterparts and are dendrite-free. However, Mg anodes suffer from surface passivation film in most glyme-based conventional electrolytes, leading to irreversible plating/stripping behavior of Mg. Here we report a facile and safe method to obtain a modified Mg metal anode with a Sn-based artificial layer via ion-exchange and alloying reactions. In the artificial coating layer, Mg₂Sn alloy composites offer a channel for fast ion transport and insulating MgCl₂/SnCl₂ bestows the necessary potential gradient to prevent deposition on the surface. Significant improved ion conductivity of the solid electrolyte interfaces and decreased overpotential of Mg symmetric cells in Mg(TFSI)₂/DME electrolyte are obtained. The coated Mg anodes can sustain a stable plating/stripping process over 4000 cycles at a high current density of 6 mA cm⁻². This finding provides an avenue to facilitate fast ion diffusion kinetics of Mg metal anodes in conventional electrolytes.  相似文献   

Inclusion in Norway: a study of ideology in practice     

Annlaug Flem  Clayton Keller 《欧洲特需教育杂志》2013,28(2):188-205

The purpose of this research was to examine how Norway's ideology of inclusion is realized in Norwegian schools and school systems, and what factors work to support or hinder its implementation. Using semi-structured interviews, we obtained data from our informants at multiple levels in the Norwegian educational system in one municipality. Our data analyses focused on identifying themes that were shared by multiple informants, as well as retaining important points or perspectives from individuals. Generally all of the informants were positive towards the ideology of inclusion. The biggest difficulty facing its implementation seemed to be that of social integration. This was much more of a concern than curricular integration. Probably because of such challenges, schools still placed students in separate settings. Factors that affected inclusion included: characteristics of teachers, classroom environment, school climate, cooperation, support from people with competence, attitudes and resources.  相似文献   

对中国档案学理论原创性研究的思考   总被引：1，自引：2，他引：1  

管先海 《档案管理》2005,(1):17-18

本文就中国档案学理论原创性研究的内涵和意义、中国档案学理论原创性研究判断的理论标准和实践标准、中国档案学理论原创性研究不足的原因以及如何增强中国档案学理论研究的原创性问题谈了个人认识。  相似文献