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유사녕(Sining Liu),이지연(Jiyon Lee) 한국비교교육학회 2020 比較敎育硏究 Vol.30 No.2
[연구목적] 본 연구는 효과적인 수업을 위한 교수자 인식에 관심을 가지고 한국과 중국의 예비 영어교사들의 교수관점을 비교하는데 목적을 두었다. [연구방법] 이를 위해, 양국의 예비 영어교사 235명을 대상으로 교수관점 지표(Teaching Perspectives Inventory, TPI) 설문을 실시하고 국가 간 교수관점 5개 영역(전달, 도제, 발달, 양육, 사회개혁)별 차이검증과 국가 내 영역 간 상관관계 분석을 실시하였다. [연구결과] 본 연구를 통해 도출된 결과는 다음과 같다. 첫째, 한국과 중국의 예비교사들은 공히 ‘양육’의 관점에서 높은 인식 점수를 나타냈다. 그리고 ‘양육’ 관점을 제외한 나머지 4개 영역에서는 중국의 예비교사들이 상대적으로 높은 점수를 보여 양국 간 교수관점에서 유의미한 차이를 나타냈다. 둘째, 중국의 경우, 양육과 도제 관점 간 높은 상관관계가 나타났고, 한국의 예비교사들은 양육과 발달 간 상관관계 점수에서 높은 수치를 보였다. 셋째, 양국 예비교사들이 5개의 관점에 대한 우선순위 선정 내용을 분석한 결과, 한국의 경우 학습자 중심의 발달 관점을 첫 번째 순위로 가장 많이 선택하였고, 중국의 예비교사들은 (내용)전달 관점을 첫 순위로 선정하였다. [결론] 이러한 연구결과는 한국과 중국의 예비영어교사들이 인식하는 효과적인 수업에 대한 통찰을 제공하고, 이에 따라 양국 예비영어 교사교육에 있어서 시사점을 제공한다. Purpose : This study aims to compare the teaching perspectives of pre-service English teachers between Korea and China. Methods : To achieve this goal, the Teaching Perspectives Inventory (TPI) was adopted to investigate the perspectives of 235 students majoring in English Education in Korea (n=75 ) and China (n=160). In 1st and 2nd semesters of 2019 in China and Korea respectively, TPI surveys were conducted and the data was analyzed. Results : The result presented three aspects: firstly, both Korean and Chinese participants tended to value Nurturing as the highest average score. Except Nurturing, the significant difference of the two countries existed in the other four teaching perspectives, including Transmission, Apprenticeship, Developmental, and Social Reform. Secondly, in Korea and China, the correlation among each teaching perspective significantly existed, but showed the different correlation value. Thirdly, in terms of the importance degree of teaching perspectives, Korean participants preferred Developmental teaching perspective, while Chinese participants selected Transmission teaching perspective. Conclusion : Based on the result, the study provided the inspiration for differences in the understanding of how effective teaching should be obtained between Korean and Chinese pre-service English teachers.
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Anisotropic AC Magnetic Susceptibility in (Ga,Mn)As Films
Xiang Li,Sining Dong,Taehee Yoo,Xinyu Liu,Sanghoon Lee,Furdyna, Jacek K.,Dobrowolska, Margaret IEEE 2015 IEEE transactions on magnetics Vol.51 No.11
<P>We report a systematic investigation of ac magnetic susceptibility in (Ga,Mn)As films as a function of temperature and magnetic field, carried out in parallel with dc magnetization measurements. The temperature dependence of ac susceptibility χ<SUB>ac</SUB> shows anisotropic behavior: 1) a single peak in χ<SUB>ac</SUB> is observed close to T for the [11̅0] orientation of the driving ac field; 2) a single peak is also seen close to 22 K for the field along [110]; and 3) peaks at both these temperatures are observed for the field applied along [100]. A detailed analysis of the ac and dc data unambiguously indicates that the peak near T is related to the paramagnetic-to-ferromagnetic phase transition, with the ferromagnetic domains nucleating with their easy axes aligned with the [11̅0] direction, providing a clear picture of uniaxial domain behavior near T . The peak near 22 K, on the other hand, is related to the onset of biaxial domain structure in (Ga,Mn)As induced by the competition between uniaxial and cubic anisotropy. More specifically, the ac susceptibility peak near T<SUB>C</SUB> involves 180° magnetization flips along the [11̅0] easy axis of the domains, while the peak near 22 K originates from magnetization wobbling between two biaxial easy axes separated by a small angle.</P>
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On nonlinear deflection analysis and dynamic response of sandwich plates based on a numerical method
Yong Huang,Zengshui Liu,Shihan Ma,Sining Liu,Rui Yu 국제구조공학회 2023 Steel and Composite Structures, An International J Vol.47 No.1
Nonlinear forced vibration properties of three-layered plates containing graphene platelets (GPL) filled skins and an auxetic core have been inquired within the present paper. Owning reduced weight as well as reduced stiffness, rectangle-shaped auxetic cores have been frequently made from novel techniques such as additive manufacturing. Here, the rectangle shape core is amplified via the graphene-filled layers knowing that the layers possess uniform and linear graphene gradations. The rectangle shape core has the equivalent material specifications pursuant to relative density value. The sandwich plate is formulated pursuant to Kirchhoff plate theory while a numerical trend has been represented to discretize the plate equations. Next, an analytical trend has been performed to establish the deflection-frequency plots. Large deflections, core density and GPL amplification have showed remarkable impacts on dynamic response of three-layered plates.
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Chen Xingbin,Li Sining,Li Gengying,Xue Bin Zheng,Liu Bingsheng,Fang Yuan,서준오,김인한,Kim Jung In 한국CDE학회 2023 Journal of computational design and engineering Vol.10 No.5
Applying building information modeling (BIM) and virtual reality (VR) in construction education is an effective way to achieve better study motivation, learnability, creativity, and observation of the real world. However, whether different levels of BIM prior knowledge affect students’ VR experimental learning, if at all, has not been examined. Therefore, this study employs a teaching intervention experiment to access the VR learning process based on the BIM prior knowledge. A total of 47 students, from the Department of Architecture and Civil Engineering, City University of Hong Kong, participated in the experiment. They were grouped according to whether they had taken the prior BIM tutorial section, with 23 participants in the group having completed the tutorial and 24 participants in the group that had not. Experiment materials were created and rendered via Autodesk Revit and Iris VR; the materials supported three tasks related to the underground design review scenarios and three other tasks about site planning review scenarios. After the experiment, a comparison study was done to discuss their differences based on VR task performances and satisfaction. The results revealed that the BIM prior knowledge mediated both the two-dimensional and three-dimensional navigations when students performed the tasks. Moreover, the relationship differences within the satisfactions showed that BIM prior knowledge effectively affected the learning outcomes. In conclusion, the comparison study implies that students’ BIM prior knowledge is efficacious in the students’ VR task performance and their VR satisfaction from cognitive and memory perspectives.
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Image-based Visual Servoing using Improved Image Moments in 6-DOF Robot Systems
Yimin Zhao,Wen-Fang Xie,Sining Liu 제어·로봇·시스템학회 2013 International Journal of Control, Automation, and Vol.11 No.3
This paper addresses the challenges of choosing proper image features for planar symmetric shape objects and designing visual servoing controller to enhance the tracking performance in image-based visual servoing (IBVS). Six image moments are chosen as the image features and the analytical image interaction matrix related to the image features are derived. A controller is designed to efficiently increase the robustness of the visual servoing system. Experimental results on a 6-DOF robot visual servoing system are provided to illustrate the effectiveness of the proposed method.
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