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A theory is developed to describe the propagation of characteristics waves through an infinite slab of irregularities in a magneto-ionic medium. The theory makes use of the asymptotic Green's dyadic. The results show that mode conversion is possible through scattering from irregularities in an anisotropic background. Some special cases are discussed and an example is given. 相似文献
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Chien-Hua Hsiao Ying-Tien Wu Chung-Yen Lin Terrence William Wong Hsieh-Hai Fu Ting-Kuang Yeh Chung-Yen Chang 《Learning Environments Research》2014,17(3):389-399
This study aimed to develop an instrument, named the inquiry-based laboratory classroom environment instrument (ILEI), for assessing senior high-school science students’ preferred and perceived laboratory environment. A total of 262 second-year students, from a senior-high school in Taiwan, were recruited for this study. Four stages were included in the development of the ILEI: (1) item formulation, (2) content validation, (3) construct validation and (4) reliability calculation. The study revealed that the ILEI was valid and reliable. Most students showed a preference for a student-directed and teacher-guided hybrid learning environment. The development of the ILEI is likely to help researchers and teachers to more effectively understand student views of the laboratory classroom environment. Our profound hope is to utilise ILEI to improve teachers’ assessment and students’ learning in inquiry-based laboratory classroom environments. 相似文献
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Liu Tzu-Chien Lin Yi-Chun Wang Tzu-Ning Yeh Shih-Ching Kalyuga Slava 《Educational technology research and development : ETR & D》2021,69(2):1183-1200
Educational technology research and development - Redundancy effect has been investigated in many controlled experimental studies, however, it is seldom investigated whether the same redundant... 相似文献
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Aesthetics has been regarded as a fundamental personal value. Most of the previous studies regarding aesthetic experience (AE) have focused on fine arts, rather than the everyday arts that are closely related to our everyday life. This study analysed the relationships among aesthetic life experience, expertise and different types of AE outcomes (aesthetic judgement and emotion) inspired by everyday designed products. The participants in this study were 115 college students, and an E‐prime program that included 120 pictures of designed products were employed to measure aesthetic judgement (beautiful, ordinary, or ugly) and aesthetic emotion (fearful, disgusting, neutral, or pleasure). The results revealed three major phenomena. (1) Two major types of AE outcomes are perceiving beauty with positive emotion and perceiving ugliness with negative emotion. (2) Although there are similar patterns for how aesthetic life experience and expertise influence personal tastes regarding beauty and aesthetic emotion, abundant expertise in designed products contributes more in differentiating emotion when viewing the beautiful designed products. (3) The consensus of the evaluation of ugliness is stronger than when evaluating beauty. In addition, a model of AE with regard to everyday designed products was proposed. The findings of this study shed light on the cultivation of aesthetic abilities and product design that could be utilised in education. 相似文献
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Yi-Chia Cheng Hsin-Te Yeh 《British journal of educational technology : journal of the Council for Educational Technology》2009,40(4):597-605
This paper explores the concepts of motivation, including extrinsic motivation and intrinsic motivation. It describes how motivation becomes a major concern in the field of instructional design (ID). Furthermore, a motivation model—the ARCS model—is identified and discussed. Finally, it provides an example of how to apply the motivational design process in ID. The aim of this paper is to facilitate a deeper understanding of motivation and to inform professionals about its importance in learning 相似文献
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This study integrated collaborative problem-based learning (collaborative PBL) with blended learning to explore the emerging process and function of online learning communities among preservice teachers. Thirty-two preservice teachers participated in a 16-week instruction program. Analyses of online group discussions and portfolios found that (a) the integrated approach facilitated the preservice teachers’ formation of online learning communities; (b) the preservice teachers’ online learning communities emerged via four stages: motivation and acquaintance, socialization and belongingness, information exchange and consensus, and tacit understanding and development; and (c) six factors influenced the development of the preservice teachers’ online learning communities. 相似文献
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以粒子蜂群网络建立高性能混凝土坍落度模型 总被引：1，自引：0，他引：1
以粒子蜂群算法(particle bee algorithm, PBA)结合神经网络(artificial neural network, NN),发展出一套能预测高性能混凝土(high performance concrete, HPC)坍落度模型的方法。以演化运算树(genetic operation tree, GOT)及倒传递网络(back propagation network, BPN)2种已发表的方法来比较其准确度。从模型的准确度可知,粒子蜂群网络(particle bee neural network, PBNN)模型预测的准确度高于GOT,但接近BPN的准确度;从参数的影响性可知,PBNN显示水、强塑剂、粗骨材、细骨材、粉煤灰及水泥添加量对于HPC坍落度的影响性大,而高炉矿渣粉用量对HPC坍落度并不敏感,显示各项材料对于坍落度的影响仍具备高度复杂性。 相似文献
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This paper reports on a study that focused on growth of understanding about teaching geometry by a group of prospective teachers engaged in lesson plan study within a computer-supported collaborative learning (CSCL) environment. Participation in the activity was found to facilitate considerable growth in the participants?? pedagogical-content knowledge (PCK). Factors that influenced growth in PCK included the nature of the lesson planning task, the cognitive scaffolds inserted into the CSCL virtual space, the meta-language scaffolds provided to the participants, and the provision of both private and public discourse spaces. The paper concludes with recommendations for enhancing effective knowledge-building discourse about mathematics PCK within prospective teacher education CSCL environments. 相似文献
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The opportunities in which university professors collaborate with the practicing school teachers in a teacher study group are few. This study investigated how a university professor facilitated a collaborative teacher study group to enhance teachers?? professional growth. Five primary school teachers and a university professor collaborated on incorporating Reader??s Theatre into the design and revision of the curriculum in a teacher study group. This study not only identified the roles of the university professor but also highlighted how this outside stimulus facilitated the process of teachers?? professional dialogues in this teacher study group. Five roles of the professor in the teacher study group were identified, including content expert, information provider, thought challenger, discussion facilitator, and caring listener. The discrepancies toward the roles that the professor in the teacher study group should serve between the elementary school teachers and the university professor were analyzed and reported. Implications were drawn for both classroom teachers and university professors. 相似文献