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놀이중심 교육과정에서 유아교사의 유아문학교육에 대한 경험
임예지(Yeji Lim) 학습자중심교과교육학회 2023 학습자중심교과교육연구 Vol.23 No.8
목적 본 연구에서는 현장의 유아교사들이 놀이중심교육과정 속에서 유아문학교육을 실제로 어떻게 직접 실시하고 있는지 경험을 탐구해보고자 하였다. 방법 본 연구의 참여자는 경기도 소재 유아교육기관에 근무하는 유아교사 20명으로 A 대학교 교육대학원 「유아문학교육」 과목 수강생이다. 참여자들이 놀이중심교육과정을 실시하면서 유아문학교육에 대해 경험하고 느낀 바에 대한 반성적 저널을 수집하고 자료를 분석하였으며, 이후 질적으로 분석하였다. 결과 놀이중심교육과정에서의 유아교사의 유아문학교육 경험을 분석해 본 결과, 첫째, 유아교사들은 놀이중심 교육과정에서 유아문학을 위한 물리적, 시간적, 공간적인 환경을 지원하고 있었다. 둘째, 유아교사들은 놀이중심 교육과정을 운영하면서 유아를 위한 문학교육을 실시하기 위해 노력했다. 교사의 개인 배경과 기관의 상황에 따라 교육과정 안에서 문학교육이 갖는 비중은 다양했고, 교육과정과는 별도로 문학교육이 독립적으로 이루어지거나 놀이와 유아문학교육이 서로 연계되거나 조화롭게 운영되기도 하였다. 결론 본 연구결과에 기초하여 유아교사들의 유아문학교육 경험과 이에 대한 생각을 살펴보았다. 본 연구는 유아교사들이 내실있는 유아문학교육을 실시하기 위한 방안을 모색하고 현장의 유아문학교육 질 향상을 도모하는데 필요한 기초를 제공하는데 의의가 있다. Objectives The purpose of this study is to explore the experience of how early childhood teachers conduct literature education for young children in a play-centered curriculum. Methods The participants in this study were 20 early childhood teachers working at an early childhood education institution in Gyeonggi-do, who were taking the 「Literature Education for Young children」 course at the Graduate School of Education of A University. The participants collected reflective journals about what they experienced and felt about literature education for young children while implementing the play-centered curriculum, analyzed the data, and then qualitatively analyzed it. Results As a result of analyzing the experience of literature education for young children in the play-centered curriculum, firstly, the early childhood teachers supported the environment for early childhood literature in the play-centered curriculum. Second, early childhood teachers made efforts to conduct literature education for young children while operating a play-centered curriculum. Depending on the teacher's personal background and the situation of the institution, the importance of literature education in the curriculum varied, and literature education was carried out independently from the curriculum, or play and literature education for young children were linked or operated in harmony. Conclusions Based on the results of this study, early childhood teachers' experiences in literature education for young children and their thoughts were examined. This study has significance in providing the necessary basis for early childhood teachers to seek ways to implement substantial literature education for young children and to promote the quality improvement of literature education for young children in the field.
수입곡물의 가격 변동에 따른 수급 안정을 위한 재고보충 계획에 관한 연구
임예지(Yeji Lim),정봉주(Bongju Jeong) 대한산업공학회 2011 대한산업공학회 추계학술대회논문집 Vol.2011 No.11
현재 수입 곡물들은 최근 바이오 연료의 생산 증가로 인한 수요가 급증하였고, 중국, 인도, 러시아 등의 개발도상국의 빠른 경제성장으로 인하여 곡물 소비가 증가하고 있으며, 세계의 곡물 재고량은 감소하고 있다. 이러한 상황에서 국내에서는 수입에 의존하고 있는 곡물들의 수급이 불안정해지기 때문에 국내에서도 국가 차원에서 수입곡물에 대한 안전재고량을 비축할 필요성이 증대 되고 있다. 본 연구에서는 이를 위하여 세계 곡물의 가격 변동을 고려하여 가격을 예측하고 비용을 최소화 하는 최적의 주문량과 주문시점을 결정하는 재고보충 계획 모형을 제안하였다.
Effect of proton irradiation on electrocatalytic properties of MnO2 for oxygen reduction reaction
Choi, Yeji,Lim, Dongwook,Oh, Euntaek,Lim, Chaewon,Baeck, Sung-Hyeon The Royal Society of Chemistry 2019 Journal of materials chemistry. A, Materials for e Vol.7 No.19
<P>Significant efforts have been made to enhance the poor intrinsic electrocatalytic activity of MnO2 toward the oxygen reduction reaction (ORR) for practical applications in fuel cells and metal-air batteries. However, the main bottleneck problems of the MnO2 catalyst for the ORR include the poor conductivity and the low activity compared to state-of-the-art Pt/C. Here, high power proton particles (14 MeV) were irradiated on MnO2, and numerous oxygen vacancies were introduced into the surface of MnO2 by decomposing water radiolytically along the proton beam. Compared with the pristine MnO2, the proton-treated MnO2 showed a much higher current density of −4.6 mA cm<SUP>−2</SUP> at 0.65 V <I>vs.</I> reversible hydrogen electrode (RHE). The proton-treated MnO2 exhibited excellent catalytic durability, maintaining 95 % of its activity after a 10 000 s chronoamperometric stability test. This outstanding ORR performance and stability can be attributed to the improved physicochemical properties resulting from the proton beam irradiation. This study provides a novel approach for the generation of oxygen vacancies by proton irradiation, improving the catalyst for use as an advanced electrode material.</P>
김예지,이도현,이재광,임강민,임서영,조정호 순천향대학교 산업기술연구소 2022 순천향 산업기술연구소논문집 Vol.28 No.2
Recently, the amount of garbage is increasing according to the economic and social development of the Republic of Korea. The government is implementing a volume-rate system for efficient waste disposal, but illegal dumping occurs frequently due to the passive participation of citizens. Currently, the method by which managers directly detect illegal dumping of garbage is not appropriate because it requires a large number of people. Therefore, it is necessary to develop a system that automatically determines whether garbage is dumped without permission. In the proposed system, the coordinates of the wrist joint of the dumper are extracted to identify the garbage bag, and the distance between the wrist and the garbage is measured to determine unauthorized dumping. In addition, in order to improve the decision error, an ID is given to each garbage bag with a multi-object tracking model. The proposed illegal dumping determination system proceeds with performance evaluation through an experiment imitating the actual illegal dumping situation, and as a result, it proves its excellent performance with a high accuracy of 0.975.
Lim, Dongwook,Park, Taesoon,Choi, Yeji,Oh, Euntaek,Shim, Snag Eun,Baeck, Sung-Hyeon The Korean Electrochemical Society 2020 Journal of electrochemical science and technology Vol.11 No.2
Highly ordered mesoporous manganese oxide films were electrodeposited onto indium tin oxide coated (ITO) glass using sodium dodecyl sulfate (SDS) and ethylene glycol (EG) which were used as a templating agent and stabilizer for the formation of micelle, respectively. The manganese oxide films synthesized with surfactant templating exhibited a highly mesoporous structure with a long-range order, which was confirmed by SAXRD and TEM analysis. The unique porous structure offers a more favorable diffusion pathway for electrolyte transportation and excellent ionic conductivity. Among the synthesized samples, Mn<sub>2</sub>O<sub>3</sub>-SDS+EG exhibited the best electrochemical performance for a supercapacitor in the wide range of scan rate, which was attributed to the well-developed mesoporous structure. The Mn<sub>2</sub>O<sub>3</sub> prepared with SDS and EG displayed an outstanding capacitance of 72.04 F g<sup>-1</sup>, which outperform non-porous Mn<sub>2</sub>O<sub>3</sub> (32.13 F g<sup>-1</sup>) at a scan rate of 10 mV s<sup>-1</sup>.