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.

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.

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.

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.

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.

프레네 교육학의 전개 과정과 현재적 의미

황성원(HWANG Sung-Won) 프랑스학회 2007 프랑스학연구 Vol.42 No.-

성과급적 연봉제에 대한 만족이 국립대 교원의 직무만족, 조직몰입, 공직봉사동기에 미친 영향

황성원 ( Hwang Sung Won ) 단국대학교 사회과학연구소 2016 공공정책과 국정관리 Vol.10 No.3

본 연구는 국립대학교 교수들의 성과급적 연봉제에 대한 만족도가 직무만족, 조직몰입, 공직봉사동기에 미치는 영향을 실증적으로 규명하는데 초점을 두고 있다. 본 연구결과를 살펴보면 다음과 같다. 성과급적 연봉제와 관련된 거의 모든 문항에서 부정적인 반응이 나타났으며, 그 중 제도자체의 호감도와 공정성, 그리고 기준과 방법의 합리성에 대해서 특히 부정적인 것으로 나타났다. 보수만족도 역시 낮게 나타났으며, 보수도 유사수준의 사립대 교수들에 비해서 낮은 것으로 나타났다. 다만, 국립대학교 교수들의 직무만족도와 조직몰입도, 그리고 공직봉사동기에서는 긍정적인 결과가 나타났다. 이를 토대로 볼 때, 국립대학교 교수들이 상대적으로 낮은 보수에도 불구하고 자긍심과 자부심을 가지고 직무에 임하고 있음을 보여주는 것이다. 성과급적 연봉제 만족도에 미치는 영향을 미치는 요인을 검증하기 위해 회귀분석을 한 결과, 공정성, 효과성, 수용성, 전제충족성의 순으로 의미가 있는 것으로 나타났다.

국면전환 GARCH 모형을 이용한 변동성 구조 분석 및 예측에 관한 실증 연구

황성원(Sung Won Hwang),류혁선(Hyeuk Sun Ryu) 한국증권학회 2011 한국증권학회지 Vol.40 No.1

파생상품 시장의 성장과 더불어 변동성의 쓰임은 점점 커지고 있으며, 그 만큼 향후 변동성에 대한 예측의 중요성도 높아지고 있다. 실무에서 변동성 예측을 위하여 주로 사용되는 방법 중에 단순평균법이 있으나 단순평균법은 변동성 구조에서 잘 알려진 평균회귀 현상이나 이분산성을 고려하고 있지 않다. GARCH 모형은 위 현상을 반영할 수 있도록 구성되어 있으나, 분산 과정의 구조적 변화(structural change in variance process)를 설명하기에는 부족하다. 본 연구는 위 현상들을 반영할 수 있는 국면전환 GARCH(Regime Switching GARCH; RS-GARCH) 모형을 소개하며 이를 기반으로 국내 주가지수 변동성의 구조를 분석한다. 또한 단순평균법 및 GARCH 모형의 예측성과와 비교하여 RS-GARCH 모형의 변동성 예측성과를 밝히고, 단기 변동성 예측모형으로서의 유용함을 밝힌다. With the growth of financial derivatives market, forecasting future volatility becomes an increasingly important tool for evaluating derivatives. Simple Moving Average (SMA) method has been popularized in business practice as a convenient method for forecasting volatility. However, it fails to take into account the mean-reversion and heteroskedasticity of volatility structure. GARCH models can explain those phenomena, but they are insufficient for explaining structural changes in variance process. This paper introduces Regime Switching GARCH (RS-GARCH) that can explain the above phenomena and thereby investigates Korean Stock Market volatility structure model. The paper also compares SMA, GARCH, and RS-GARCH model for their respective performance in forecasting volatility, and explains why the RS-GARCH model is more effective than the two alternative models in forecasting short-term volatility.

노인의 일상생활장애 정도에 따른 고령친화제품 분류 특성 연구

황성원 ( Hwang Sungwon ),모정현 ( Mo Jeong Hyun ),이윤희 ( Lee Yunhee ) 한국디자인트렌드학회 2011 한국디자인포럼 Vol.33 No.-

고령사회 진입을 앞두고 노년기의 생활의 질에 대한 관심이 점차 증가함에 따라 고령친화산업은 매우 확장 가능성이 큰 분야로 전망되고 있다. 그러나 고령친화제품은 제품별 기능과 성능 위주로 공급되어 정확한 사용방법과 가이드라인이 마련되어 있지 않다. 따라서 본 연구는 고령친화제품의 제품 분류 기준을 사용자의 일상생활장애 정도, 생활공간별 분류 기준틀을 제안한다. 이는 노화로 인한 일상생활수행능력이 떨어지는 노인들의 장애 정도에 따른 올바른 제품선택을 돕는 기준이 되고 고령친화제품체험관 전시체험 프로그램에 반영하여 좀 더 효율적인 정보전달이 가능하도록 한다. 이러한 연구결과는 생활공간별, 장애등급별 제품 개발의 필요성을 파악해 고령친화산업 발전방향 제시에 기초 자료로 활용될 것이다. In Korea, welfare needs brought on by the rapidly growing of elderly population. Also, the senior group with spare time, wealth and health is increasing. Currently, the people have known about needs welfare system for improving quality of life during senescence personally and socially. In addition to the senior friendly industry, having distinction with simple approach medical services, will be great expanding after 2010. And there will be a new welfare services plan supporting long term care insurance for senior citizens. But we don`t have prepared systematically organized senior friendly industry and products yet. So, the purpose of the study is to analyze systematically the classification characteristics of the senior friendly products according to the difficulty of daily living for senior citizens. Above all, the study finds out the senior friendly products characteristics according to the consumer`s various situations about health and housing space. Therefore the result of the study reveals that the simulation guidelines for choosing the products depend on the customer`s needs are essential and useful to improve senior friendly industry. And the post evaluation data of senior friendly products would be put to practical use in the industry.

5월의 광장 ‘안’ 에서 ‘밖’ 일 수밖에 없었던 이유

황성원(Hwang Sung Won) 도서출판여이연 2009 여성이론 Vol.- No.20