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- 저자 : Jieyu Chen (검색결과 5 건)
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진결우(Chen, Jieyu),최지은(Choi, Jieun) 한국창의력교육학회 2022 창의력교육연구 Vol.22 No.1
본 연구는 인지통제가 창의성의 영역별로 다를 것이라는 가정 하에 과학적 창의성의 인지통제 메카니즘을 알아보고자 하였다. 이를 위해 285명의 중국 대학생을 대상으로 과학적 창의성 검사를 통해 창의성이 높은 대학생들(20명)과 낮은 대학생들(20명)을 구분하고, 이들 간의 인지통제기능의 차이를 비교하였다. 인지통제기능은 전통적으로 많이 사용되는 Stroop 과제를 사용하여 측정하였다. 연구 결과, 첫째, Stroop 과제 중 불일치자극 조건에서 과학적 창의성이 높은 학생들이 그렇지 않은 학생들에 비해 반응의 정확도가 유의하게 더 높았다. 둘째, Stroop 효과의 차이를 비교한 결과, 반응 속도 면에서 두 집단 간에 유의한 차이가 나타났다. 이러한 결과는 과학적 창의성이 높은 학생들이 그렇지 않은 학생들에 비해 인지통제 수준이 높아 결과적으로 과학적인 창의적 생산성을 높이는 데 유리할 것임을 시사한다. 이후 본 연구의 제한점과 향후 연구를 위한 제언을 논하였다. This study investigates the cognitive control of scientific creativity, according to the assumption that cognitive control would be different for each creative domain. High and low creativity group (N=20, respectively) are distinguished through a scientific creativity test for Chines college students (N=285), and the differences in cognitive control function are compared between two groups. Cognitive control function is measured using the Stroop task, which is traditionally used widely, and the study subjects are students of A University, Hebei Province, China. As a result, first, under the inconsistent stimulus condition in the Stroop task, high scientific creativity group has significantly higher response accuracy than low creativity group. Second, in Stroop effect for reaction speed, there is a significant difference between the two groups. Based on these results, this study concludes that the individual with high scientific creativity has higher cognitive control. Afterwards, the significance of this study and suggestions for future research are discussed.
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Effects of Ho, Mn Co-Doping on Ferroelectric Fatigue of BiFeO3 Thin Films
Shifeng Zhao,Jieyu Chen,Wenyu Xing,Qi Yun,Wei Gao,Chenghong Nie 대한금속·재료학회 2015 ELECTRONIC MATERIALS LETTERS Vol.11 No.4
Ho, Mn, and Ho, Mn co-doped BiFeO3 thin films were deposited on Pt (100)/Ti/SiO2/Si substrates using solution gelation. The ferroelectric fatigue properties were clearly improved after doping with Ho and Mn. The doped BiFeO3 thin film displayed more strongly increased ferroelectric, leakage current, and fatigue properties compared with the pure BiFeO3 thin film. Thus, the improved performance of the BiFeO3 thin films depends on the structural transformation and reduced oxygen vacancy concentration. The present work provides a feasible approach to enhance the ferroelectric and fatigue properties of BiFeO3-based thin films.
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Investigation of Different Conduction States on the Performance of NMOS-Based Power Clamp ESD Device
Wei Weipeng,Wang Yang,Chen Xijun,Zheng Yifei,Li Jieyu,Cao Pei,Cao Wenmiao 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.3
This article investigates the eff ects of diff erent gate coupling voltage and gate voltage duration on electro-static discharge (ESD) performance of several NMOS-based power rail protection devices. Through simulation and transmission line pulse (TLP) test, it is found that there are two modes in the conduction process of the main clamping NMOS: channel conduction state and parasitic NPN conduction state. Diff erent gate voltage and duration bring the two conduction states diff erent proportions in the whole working process, which give the device very diff erent robustness. The results show that under the condition of small gate voltage and long duration and the condition of large gate voltage and short duration, the device can achieve optimal performance because the trigger voltage can be reduced, and the parasitic NPN can be turned on in time to release most of the current
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Ning Gao,Yaxu Chen,Chengyu Wang,Yanling Guo,Jieyu Zhang 한양대학교 세라믹연구소 2021 Journal of Ceramic Processing Research Vol.22 No.6
In this paper, we proposed a novel method to prepare MgO-Al2O3-SiO2 (MAS) glass-ceramics through direct heat treatmentwith the slag of laterite ore. First, the Ni-Fe alloy and slag glass were prepared simultaneously by this method, and the yieldrate of Ni-Fe alloy was up to 95.69%. Then, the MAS glass-ceramics can be obtained by direct heat-treating for the slag glass. The energy consumption of glass-ceramics production was much lower than that in traditional method to make full use of thethermal energy of the molten slag. The crystallization behavior of the glass-ceramics was investigated by XRD, DSC andFESEM. The results demonstrate that many phase-separated droplets appear in the slag glass. During the heat treatment, thephase-separated droplets as favorable nucleation sites to inducing crystallization. The crystallinity and crystallite size of thesamples exhibits an increasing tendency with the increase of heat treatment temperature and time. The crystalline phases ofglass-ceramics were two different compositions magnesium aluminum silicates (MgAl2Si4O12 and (Mg,Al)SiO3). The activationenergies of the slag glass were calculated by Kissinger and Ozawa method, which were 308.81 and 309.36 kJ·mol-1, respectively. And the crystallization mechanism of the glass-ceramics was dominated by both the surface crystallization and bulkcrystallization with one-dimensional growth.
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Optical and Magnetic Properties of Copper Doped Zinc Oxide Nanofilms
Shifeng Zhao,Yulong Bai,Jieyu Chen,Alima Bai,Wei Gao 한국자기학회 2014 Journal of Magnetics Vol.19 No.1
Copper doped Zinc Oxide nanofilms were prepared using a simple and low cost wet chemical method. The microstructures, phase structure, Raman shift and optical absorption spectrum as well as magnetization were investigated for the nanofilms. Room temperature ferromagnetism has been observed for the nanofilms. Structural analyses indicated that the films possess wurtzite structure and there are no segregated clusters of impurity phase appreciating. The results show that the ferromagnetism in Copper doped Zinc Oxide nanofilms is driven either by a carrier or defect-mediated mechanism. The present work provides an evidence for the origin of ferromagnetism on Copper doped Zinc Oxide nanofilms.
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