Chen Y.-J.,Wenzao Ursuline University of Languages
Educational Technology and Society | Year: 2016
The processes and patterns of strategies used by children when drawing on the computer with friends and acquaintances were investigated in a case study. The participants were five-and-six-year-old children and the study took place in their home settings. The data collection methods consisted of interviews, observations, audio recordings, video recordings, drawing artifacts, and screen capture. The analysis began with the selection of collaborative episodes, followed by the interpretation of those episodes. The findings revealed a striking contrast between the collaboration of friendship pairs and acquaintance pairs. The friendship pairs exhibited a total number of 23 episodes while the acquaintance pairs engaged in only three episodes. The young children in this study used two main collaborative strategies: (1) establishment of the pretend frame and, (2) coherence and elaboration of pretend frames. The acquaintance pairs applied only the strategy of the establishment of pretend frame while collaborative strategies of friendship pairs showed unique path of progression from the establishment to coherence and elaboration of pretend frames. Established, playful relationships (such as friendships) appear to allow children to productively begin experiencing computer activities.
Yang S.-B.,Wenzao Ursuline University of Languages
Journal of Electronic Imaging | Year: 2014
The normalized cut (Ncut) method is a popular method for segmenting images and videos. The Ncut method segments an image into two disjoint regions, each segmented by the same method. After the Ncut method has been recursively applied to an image, its final segmented image is obtained. The main drawback of the Ncut method is that a user cannot easily determine the stop criteria because users have no idea about the number of regions in an image. This work proposes the genetic cut (Gcut) algorithm to resolve this shortcoming. Users do need not to specify thresholds in the Gcut algorithm, which automatically segments an image into the proper number of regions. Also, the neighbor-merging (NM) algorithm is proposed for preprocessing the images and improves the performance of the Gcut algorithm. Thus, the proposed Gcut method combines the NM and Gcut algorithms. Furthermore, a heuristic method is proposed to identify a good segment for the Gcut method. In all experiments, the proposed Gcut method outperforms traditional Ncut methods. © 2014 SPIE and IS&T.
Lee H.-C.,Wenzao Ursuline University of Languages
International Journal of Computer Mathematics | Year: 2014
We implemented weighted least-squares finite element methods for the linearized Navier-Stokes equations based on the velocity–pressure–stress and the velocity–vorticity–pressure formulations. The least-squares functionals involve the L2-norms of the residuals of each equation multiplied by the appropriate weighting functions. The weights included a mass conservation constant, a mesh-dependent weight, a nonlinear weighting function, and Reynolds numbers. A feature of this approach is that the linearized system creates a symmetric and positive-definite linear algebra problem at each Newton iteration. We can prove that least-squares approximations converge with the linearized version solutions of the Navier–Stokes equations at the optimal convergence rate. Model problems considered in this study were the flow past a planar channel and 4-to-1 contraction problems. We presented approximate solutions of the Navier–Stokes problems by solving a sequence of the linearized Navier–Stokes problems arising from Newton iterations, revealing the convergence rates of the proposed schemes, and investigated Reynolds number effects. © 2014, Taylor & Francis.
Lin H.-Y.,National Chin - Yi University of Technology |
Wu C.-F.,Wenzao Ursuline University of Languages |
Lin C.-J.,National Chin - Yi University of Technology |
Yu C.-Y.,National Chin - Yi University of Technology
International Journal of Fuzzy Systems | Year: 2015
This paper proposes a fuzzy cerebellar model articulation controller using a strategy-adaptation-based bacterial foraging optimization (SABFO) algorithm to solve classification problems. A strategic approach to the chemotaxis step in the SABFO algorithm was adopted: in this approach, each virtual bacterium swims on different run-lengths, and bacterial diversity is increased. The simulation results indicated that the performance of the proposed method was more favorable than that of other methods. © 2015 Taiwan Fuzzy Systems Association and Springer-Verlag.
Liu C.-Y.,Wenzao Ursuline University of Languages |
Yu C.-P.,Tamkang University
Cyberpsychology, Behavior, and Social Networking | Year: 2013
Over the past few decades, the widespread phenomenon of Internet abuse has gained attention from the public, academia, and the media. In a departure from this negative viewpoint, however, researchers and educators have devoted considerable effort in attempting to understand the influence of online communication on people's psychological well-being. This study focuses specifically on Facebook, and proposes a research model to examine the relationships among Facebook use, online social support, general social support, and psychological well-being. Our results show that using Facebook helped college students to obtain online social support, and that online social support is an extension of general social support. However, although general social support contributes to well-being, online social support appears to have little direct effect on well-being. The relationship between online social support and well-being is mediated through the factor of general social support. © Copyright 2013, Mary Ann Liebert, Inc. 2013.