Content analysis of online discussion on a senior-high-school discussion forum of a virtual physics laboratory     

Ying-Hua Guan  Chin-Chung Tsai  Fu-Kwun Hwang 《Instructional Science》2006,34(4):279-311

In this study we content analyzed the online discussion of several senior-high-school groups on a forum of a virtual physics laboratory in Taiwan. The goal of our research was to investigate the nature of non-course-based online discussion and to find out some useful guidelines in developing such discussion forums for learning purposes. We adapted Henri’s framework and models (1992) for our analysis. The content analysis was conducted in terms of participation rate, social cues, interaction types, and cognitive and metacognitive skills. In this study, we compared the result patterns of two discussion conditions (‘required’ (R-) condition versus ‘non-required’ (NR-) condition) of a non-course-based discussion forum and investigated how the quality of message content changed in the processes of discussion. In the R-condition, participants were required to reply to the thread before they were allowed to read other messages on the forum, whereas participants in the NR-condition were not restricted to this demand. The results showed that for both conditions, the most frequently involved interaction type was ‘direct response’, and the most frequently used cognitive skill was ‘elementary clarification’. Fewer participants of the R-condition strayed from the subject under discussion in comparison to the NR-condition. However, larger percentage of message content containing metacognitive components was found in the NR-condition. When taking the sequences of postings into account, we found that for the R-condition, the percentage of metacognitive component in the message content tended to increase in the up-third postings, whereas for the up-third postings of the NR-condition the percentage of non-cognitive components substantially increased. Overall, the results of our study indicated that the way in which participants used cognitive and metacognitive skills during the discussions was related to the discussion conditions. The initial requirement of reply fostered the use of cognitive skills, but it did not necessarily induce the use of high-level cognitive or metacognitive skills. We concluded that beside the discussion conditions the moderators’ guidance would be influential in determining the quality of online discussion on a non-course-based discussion forum. in final form: 19 August 2005  相似文献   

China’s rising research universities: a new era of global ambition     

Chia-Wen Tsai 《高等教育研究与发展》2017,36(5):1091-1094

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Exploring the effects of web-mediated computational thinking on developing students’ computing skills in a ubiquitous learning environment     

Chia-Wen Tsai  Pei-Di Shen  Meng-Chuan Tsai  Wen-Yu Chen 《Interactive Learning Environments》2017,25(6):762-777

Much application software education in Taiwan can hardly be regarded as practical. The researchers in this study provided a flexible means of ubiquitous learning (u-learning) with a mobile app for students to access the learning material. In addition, the authors also adopted computational thinking (CT) to help students develop practical computing skills. Three classes of first-year students were chosen for the empirical study. They were divided into three groups: two experimental groups (CT&UL group and CT group) and one control group. According to the results in this study, students who received the treatment of u-learning could have significantly better computing skills in using PowerPoint and Word than those without. However, the treatment of web-mediated CT did not result in better development of students’ computing skills in this research. Finally, the researchers expect that this study provides a design and illustration of CT in a u-learning environment for schools and educators.  相似文献   

Students’ motivational beliefs and strategies,perceived immersion and attitudes towards science learning with immersive virtual reality: A partial least squares analysis     

Kun-Hung Cheng  Chin-Chung Tsai 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(6):2140-2159

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Exploring the relationships between students' academic motivation and social ability in online learning environments   总被引：1，自引：0，他引：1  

Chia-Chi Yang  I-Chun Tsai  Bosung Kim  Moon-Heum Cho  James M. Laffey   《The Internet and Higher Education》2006,9(4):277-286

This research explicates the construct of social ability and describes the relationship between students' academic motivation and social ability in online learning environments. Findings reveal perceived peers social presence, perceived written communication skills, perceived instructor social presence, comfort with sharing personal information, and social navigation as the five factors that define social ability. In addition, the multivariate multiple regression analyses indicate that different motivational constructs vary in their relationships with the multiple social ability factors. Intrinsic goal orientation is related to perceived peers social presence. Self-efficacy explains the variance of perceived instructor social presence and comfort with sharing personal information. Task value is associated with social navigation and both perceived peers and instructor social presence. Additional studies are needed to replicate the current findings and further explicate social ability in online learning, to continue to improve the social ability instrument, and to examine the value of other academic motivation beliefs in predicting social ability as well as that of social ability in predicting learning outcomes.  相似文献   

Misconception of sound and conceptual change: A cross‐sectional study on students' materialistic thinking of sound          下载免费PDF全文

Haim Eshach  Tzu‐Chiang Lin  Chin‐Chung Tsai 《科学教学研究杂志》2018,55(5):664-684

There is a concern that materialistic thinking—meaning the tendency to attribute a set of matter‐like properties to nonmatter concepts—is one of the central barriers that students face in the journey toward understanding scientific concepts. The cross‐sectional study presented here used the Sound Concept Inventory Instrument (SCII) (Eshach, [ 2014 ], Physical Review Physics Education Research, 10, 010202) to examine how Taiwanese students (N = 717: Grade 7 to undergraduate level) associate the nonmaterial concept of sound with this set of (erroneous) materialistic properties and/or with the (correct) scientific view. Its results show that students in all academic level groups associated sound, at least to some extent, with all of the materialistic properties defined in the instrument. Grades 7–9 evidenced the greatest amount of materialistic thinking, followed by Grade 11, with the lowest levels of materialistic thinking being shown by Grades 10 and 12, as well as university students. We also found that the respondents' confidence in the materialistic view they expressed was high. The results suggest that the extent to which students associate sound with materialistic thinking is not ordered by academic level, but was rather influenced by the immediate relevance of each group's recent curriculum to the topic of sound. This article concludes by examining the results through the lens of several different theories of conceptual change, and by making suggestions, in light of these results, for how the teaching of sound concepts might be improved.  相似文献   

Digital redesign of analog smith predictor for systems with long input time delays     

Linbo Xie  Leang-San Shieh  Jason Sheng-Hong Tsai  Shu-Mei Guo  Alex Christian Dunn 《Journal of The Franklin Institute》2017,354(14):5797-5812

The discretization of the analog Smith predictor by using the prediction-based state-matching digital redesign method for systems with various input time delays was recently investigated in the literature. This paper presents an alternative Chebyshev quadrature state-matching digital redesign method for discretization of the analog Smith predictor for systems with a long input time delay. In order to implement the digitally redesigned Smith predictor by utilizing the output-feedback of the plant, an ideal state reconstructor for the long input-delayed plant is established. The long dead time of interest is an integer plus a fractional input delay. An illustrative example is given to demonstrate the effective of the proposed approach.  相似文献   

Modeling knowledge sharing among high-tech professionals in culturally diverse firms: mediating mechanisms of social capital     

Yuan-Hui?Tsai  Sheng-Wuu?Joe  Chieh-Peng?LinEmail author  Po-Hsuan?Wu  Yueh-Hung?Cheng 《知识管理研究与实践》2017,15(2):225-237

Drawing upon social capital theory, this research postulates cultural intelligence as a key driver of knowledge sharing through the mediation of social capital among employees from culturally diverse organizations. An empirical testing of the proposed model, by investigating Taiwanese professionals from high-tech foreign companies in Taiwan, reveals the applicability of social capital theory in understanding the relationship between cultural intelligence and knowledge sharing. The study’s test results show that cultural intelligence indirectly influences knowledge sharing through different dimensions of social capital. This research further provides managerial implications and limitations.  相似文献   

Query-level loss functions for information retrieval     

Tao Qin  Xu-Dong Zhang  Ming-Feng Tsai  De-Sheng Wang  Tie-Yan Liu  Hang Li 《Information processing & management》2008

Many machine learning technologies such as support vector machines, boosting, and neural networks have been applied to the ranking problem in information retrieval. However, since originally the methods were not developed for this task, their loss functions do not directly link to the criteria used in the evaluation of ranking. Specifically, the loss functions are defined on the level of documents or document pairs, in contrast to the fact that the evaluation criteria are defined on the level of queries. Therefore, minimizing the loss functions does not necessarily imply enhancing ranking performances. To solve this problem, we propose using query-level loss functions in learning of ranking functions. We discuss the basic properties that a query-level loss function should have and propose a query-level loss function based on the cosine similarity between a ranking list and the corresponding ground truth. We further design a coordinate descent algorithm, referred to as RankCosine, which utilizes the proposed loss function to create a generalized additive ranking model. We also discuss whether the loss functions of existing ranking algorithms can be extended to query-level. Experimental results on the datasets of TREC web track, OHSUMED, and a commercial web search engine show that with the use of the proposed query-level loss function we can significantly improve ranking accuracies. Furthermore, we found that it is difficult to extend the document-level loss functions to query-level loss functions.  相似文献   

An approximate analytic solution of the nonlinear Riccati differential equation     

Pa-Yee Tsai 《Journal of The Franklin Institute》2010,347(10):1850-1862

In this paper, a hybrid method which combines the Adomian decomposition method (ADM), the Laplace transform algorithm and the Padé approximant is introduced to solve the approximate analytic solutions of the nonlinear Riccati differential equations. This hybrid method demonstrates accurate and reliable results, and has a great improvement in the ADM truncated series solution which diverges rapidly as the applicable domain increases. Three examples herein are given to demonstrate good accuracy and fast convergence in comparison with the exact solution.  相似文献