이종 계면저항 저감 구조를 적용한 그래핀 양자점 기반의 고체 전해질 특성

황성원,Hwang, Sung Won 한국반도체디스플레이기술학회 2022 반도체디스플레이기술학회지 Vol.21 No.3

The stabilized all-solid-state battery structure indicate a fundamental alternative to the development of next-generation energy storage devices. Existing liquid electrolyte structures severely limit battery stability, creating safety concerns due to the growth of Li dendrites during rapid charge/discharge cycles. In this study, a low-dimensional graphene quantum dot layer structure was applied to demonstrate stable operating characteristics based on Li+ ion conductivity and excellent electrochemical performance. Transmission electron microscopy analysis was performed to elucidate the microstructure at the interface. The low-dimensional structure of GQD-based solid electrolytes has provided an important strategy for stable scalable solid-state lithium battery applications at room temperature. This study indicates that the low-dimensional carbon structure of Li-GQDs can be an effective approach for the stabilization of solid-state Li matrix architectures.

InGaN/GaN Micro-LED구조를 위한 그래핀 양자점 기반의 산화막 기판 특성

황성원,Hwang, Sung Won 한국반도체디스플레이기술학회 2021 반도체디스플레이기술학회지 Vol.20 No.3

The core-shell InGaN/GaN Multi Quantum Well-Nanowires (MQW-NWs) that were selectively grown on oxide templates with perfectly circular hole patterns were highly crystalline and were shaped as high-aspect-ratio pyramids with semi-polar facets, indicating hexagonal symmetry. The formation of the InGaN active layer was characterized at its various locations for two types of the substrates, one containing defect-free MQW-NWs with GQDs and the other containing MQW-NWs with defects by using HRTEM. The TEM of the defect-free NW showed a typical diode behavior, much larger than that of the NW with defects, resulting in stronger EL from the former device, which holds promise for the realization of high-performance nonpolar core-shell InGaN/GaN MQW-NW substrates. These results suggest that well-defined nonpolar InGaN/GaN MQW-NWs can be utilized for the realization of high-performance LEDs.

PVP GQD / HfOx 구조를 갖는 전도성 필라멘트 기반의 저항성 스위칭 소자 특성

황성원,Hwang, Sung Won 한국반도체디스플레이기술학회 2021 반도체디스플레이기술학회지 Vol.20 No.1

A composite active layer was designed based on graphene quantum dots, which is a low-dimensional structure, and a heterogeneous active layer of graphene quantum dots was applied to the interfacial defect structure to overcome the limitations. Increasing to 1.5~3.5 wt % PVP GQD, Vf changed from 2.16 ~ 2.72 V. When negative deflection is applied to the lower electrode, electrons travel through the HfOx/ITO interface. The Al + ions are reduced and the device dominates at low resistance. In addition, as the PVP GQD concentration increased, the depth of the interfacial defect decreased, and the repetition of appropriate electrical properties was confirmed through Al and HfOx/ITO. The low interfacial defects help electrophoresis of Al+ ions to the PVP GQD layer and the HfOx thin film. A local electric field increase occurred, resulting in the breakage of the conductive filament in the defect.

청소년을 위한 '이동과학교실' 사례연구를 통한 재미있는 과학의 특성 연구

황성원,최정훈,황북기,Hwang, Sung-Won,Choi, Jung-Hoon,Hwang, Book-Hee 한국초등과학교육학회 2005 초등과학교육 Vol.24 No.5

The 'Mobile Science Lab' is a public program designed to bring teenagers to be engaged in the activities of science and technology. In this study, we attended to elementary school students' participating actions in the program and intended to understand their enjoyment of science from sociocultural and practical perspectives. By drawing on case materials culled from our database, we articulated the features of the enjoyable science activities in the form of two major claims. First, students had rich opportunities to communicate emotionality, which therefore grounds emerging actions on the positive emotional valence. Second, ongoing actions opened up new action possibilities not only to the actors themselves, but also to other community members. The results of this study constitute theoretical frameworks for understanding enjoyment without dichotomizing emotion and cognition, and thereby contribute to designing enjoyable activities of learning science.

서남해안 2.5GW 해상풍력단지 건설의 경제효과분석

박재필 ( Jae Pil Park ),김민영 ( Min Young Kim ),황성원 ( Sung Won Hwang ),김형성 ( Hyoung Sung Kim ) 한국도서(섬)학회 2014 韓國島嶼硏究 Vol.26 No.3

MOTIE(Ministry of Trade, Industry & Energy) aims to build a Southwest 2.5GW offshore wind farm. The job will require help from the government, electric operator and manufacturers. The domestic offshore wind farm market will boost global competitiveness up until 2019. This research analyzes the economic impact of the offshore wind farm project. The local acceptance in terms of production, employment and value added are expected to be maximized. According to the quantitative analysis using the extended 2010 input-output table, we calculated that the production inducement impact will reach up to 13.5 trillion won. 11.07 trillion won from the offshore wind farm industry and 2.4 trillion won from others. Furthermore the impact of increase in employment is expected to reach 22,662. 9,883 will be from the wind farm industry and 12,779 from other fields. The impact is expected to be greater especially during the middle of the jobless growth period, Lastly, the value added inducement impact is expected to be 4.24 trillion won. Regarding economic impacts, strategies required for increasing local acceptance are as follows. First, in order to diversify and sophisticate the primary industry into a secondary or tertiary one, we need to develop the nearby wind farm site into a wind farm thema park. Attracting the wind farm production, installing and maintaining/repairing firms and establishing an experience center for K-12 students by providing them an education center for offshore wind energy can be specific means of development. Also, during the operation and after the destruction of facilities, the government should lay out the sub-structure of the wind farm as a sea ranch. Thirdly, the level of local acceptance regarding the community ownership of the offshore wind farm should increase to those of Middelgrunden(Denmark) and Navarra(Spain). Considering the economic condition of Buan, Gochang and the Yeonggwang area, community ownership is one of best solutions for the increment of local tax revenue. At last, considering the supports system of areas adjacent to power plants and ``Partnership management with local community’, the offshore wind farm operator may need to provide assistant policies to nearby communities. The policies should be based on Corporate Social Responsibility(CSR) such as education scholarship projects, local economy cooperative projects, sports/culture projects.

프랑스 학교의 역사-지리-민주시민교육 연구

황성원(HWANG Sung-Won) 한국프랑스문화학회 2011 프랑스문화연구 Vol.23 No.-

Dans cette étude, nous voulons savoir le contenu des programmes nationaux dans l'enseignement de l'histoire-géographie à l'école, également au collège et au lycée. En France, l'éducation civique est ajoutée à l'histoire-géographie dans l'enseignement secondaire. Notre étude recouvre non seulement les programmes, mais aussi les accompagnements qui ont des fonctions de donner des informations pratiques aux enseignants et de les guider pour varier des pratiques pédagogiques. Les enseignants ont l'autonomie pour le choix de leurs méthodes éducatives. Enseigner l’histoire et la géographie, c’est chercher à fournir aux élèves une vision du monde et à exercer une mémoire. aidant à constituer le patrimoine culturel qui permet à chacun de trouver son identité. Les finalités de l’enseignement, qu’elles soient culturelles, civiques et intellectuelles, demeurent identitques et sont communes à l’histoire et à la géographie ainsi qu’à l’éducation civique, juridique et sociale. Nous constatons que le programme scolaire encourage l'intégration des matières, c'est-à-dire entre l'histoire et l'histoire de l'art ou entre la géographie et la biologie etc. Afin, pour que les programmes affichés au Bulletin officiel soient réalisables, ils sont nettement délimités tout en préservant la liberté pédagogique des enseignants.

전기와 자기에 대한 중학생들의 개방적 탐구에서 과제 유형에 따른 탐구 수행 분석

황성원(Sung Won Hwang),박승재(Sung Jae Pak) 한국과학교육학회 2001 한국과학교육학회지 Vol.21 No.2

The purpose of this study is to analyse the eighth grade students` performance of open investigations for two kinds of tasks: the qualitative one which involves the descriptive approach through observation, and the quantitative one which involves the quantitative data processing through control of variables. Researcher`s observation, interview data as well as students` investigation reports, self-evaluations were analysed. The difficulties of qualitative open investigation lie in detecting and dealing with unexpected observations, of which the acceptance and interpretation were influenced by preconceptions. On the other hand, managing several variables, making reliable and valid measures, and quantitative data processing constituted main difficulties of quantitative open investigation. Some students could recognize the deficiencies of their methods and findings in qualitative one, but few in quantitative one. These results suggest the teaching point for each task of open investigations.

공공기관 직무급 제도에 대한 고찰

황성원(Sung Won Hwang) 한국공기업학회 2024 공기업논총 Vol.24 No.1

본 연구는 직무급의 본래적 의미와 내용을 살펴보고, 공공기관들이 직무급을 제대로 도입하기 위해 어떠한 노력을 기울여야 할 지에 대해 현황 분석 및 공공기관 경영평가 경험 등을 통해 문제점을 규명하고, 발전방안을 제시하고자 하였다. 본 연구 결과를 기반으로 다음의 정책제언을 제시한다. 첫째, 직무급 제도의 성공적인 도입을 위해 획일적 도입보다는 가능한 직무부터 단계적 도입을 추진하는 전략적 고려가 필요하다. 직무급 제도는 직위분류제를 기반으로 하므로 관련 인사제도와 정합성을 높여야 한다. 둘째, 직무급제도는 직위분류제를 기반으로 하므로 관련 인사제도와 정합성을 높여야 한다. 셋째, 임금의 조직 외부 공정성을 형성하기 위해 직무별 시장임금 벤치마킹을 적극 추진해야 한다. 넷째, 환경변화에 대응하기 위해 직무평가는 주기적으로 추진되어야 한다. This study examined the original meaning and content of the job-based pay, identified problems through current situation analysis and experience in management evaluation of public institutions, and suggested development plans for what efforts public institutions should make to properly introduce the job-based pay. Based on the results of this study, the following policy recommendations are presented. First, for the successful introduction of the job-based pay system, flexible strategic considerations are needed to promote the phased introduction of possible jobs rather than uniform introduction. Since the job-based pay system is based on the position classification system, it is necessary to increase the consistency with the related personnel system. Second, since the job-based pay system is based on the position classification system, it is necessary to increase the consistency with the related personnel system. Third, it is necessary to actively promote market wage benchmarking for each job in order to form fairness outside the organization of wages. Fourth, job evaluation should be periodically promoted to respond to environmental changes.

개방형 공립학교 모델

황성원(Hwang, Sung-Won) 한국비교교육학회 2009 比較敎育硏究 Vol.19 No.2

이 연구는 개방형 공립학교 모델로서 프랑스의 프레네 학교에 대한 운영 철학, 운영 내용과 특징, 교육실천 사례, 우리나라 공교육 개혁에의 시사점을 다루고자 하였다. 프레네 학교는 프랑스의 교육실천가 셀레스탱 프레네(Célestin Freinet, 1896~1966)의 교육철학에 근거하고 있다. 연구자는 프레네 학교가 우리나라 공립학교의 변화와 개혁에 어떠한 영향을 줄 수 있는지 살펴보고자 하였으며 시사점은 다음과 같다. 첫째, 학생 자치회 운영을 통해 민주적인 의사결정에 기초한 개방형 공립학교를 구축할 수 있을 것이다. 둘째, 다양한 교육방법과 기술을 토대로 학생의 욕구를 반영한 프레네 교수학습 모형을 개발할 수 있을 것이다. 셋째, 프레네 학교에서는 교사협력팀을 구성하여 교육과정의 탄력적 운영을 통해 교과의 통합적 공동 운영을 실시할 수 있을 것이다. 이는 우선적으로 학급 또는 학년 간의 개방을 전제로 한다. 넷째, 프레네 교사들의 다양한 교재 개발 노력은 교과서 중심의 수업을 벗어나 여러 매체와 자료를 활용하는 수업 실천사례를 공유하여 교실수업의 질 개선에 기여할 수 있을 것으로 보인다. This research deals with Freinet School in France as a model of open public schools, with focus on the school’s operating philosophy, operating contents and characteristics, the cases of educational practices and suggestions for Korea’s public education reform. Freinet School has been operated based on the educational philosophy of the French education activist Célestin Freinet(1896-1966). This researcher approached the following four research subjects in order to examine what effects Freinet School can have on the change and reform of Korea’s public schools. First: What are the educational effects that Freinet School has on the public educational system in France? Second: What are the operating principles of Freinet School and what are the characteristics of the school’s viewpoints and roles towards its teachers and students? Third: What are the kinds of the educational activities and the status of utilization of time and space with regard to Freinet School’s operating regulations and the cases of educational practices? Fourth: What suggestions can Freinet School provide for Korea’s public educational reform? This researcher have conducted preceding and philological researches on Freinet School pedagogy and analyzed such data as moving images, interviews with teachers, and the books published by Freinet School Teachers’ Association.

프랑스의 크레쉬(Creche) 중심 육아지원 체제

황성원 ( Sung Won Hwang ) 한국프랑스문화학회 2013 프랑스문화연구 Vol.27 No.-