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Lee Junghun,Lee Dongyeong,Lee Jaehyeong,Yoon Minhan,Jang Gilsoo 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.4
In this study, we analyzed the impact of multi-terminal direct current (MTDC) system on the integration of renewable energy resources into the Korean power system. Due to the large-scale renewable energy plants planned to be integrated into the power system, line congestion is expected in the southern part of power system. Given the difficulty in constructing AC transmission lines due to social conflicts, we proposed an alternative solution using an offshore multi-terminal DC offshore transmission system. Firstly, we calculate the effective renewable energy plant generation capacity based on annual wind and solar radiation data. Next, we conduct PSS/E simulations to minimize future line congestion in the Korean power grid. The offshore terminal is designed to transfer the power generated in southern Korea and is verified using different terminal rating cases. The simulation result, including contingency analysis, demonstrate that transferring 80% of the generated renewable power achieves the best line flow condition. Therefore, the MTDC system is a possible candidate for integrating future renewable energy systems into the Korean power grid.
( Jeongil Lee ),( Kanghyun Lee ),( Ohhyun Kim ),( Heeyong Lee ),( Junghun Lee ),( Inhye Kang ) 대한응급의학회 2014 대한응급의학회 학술대회초록집 Vol.2014 No.2
Improper transfer rate of trauma patients in the pre-hospital trauma care was 50.7% and the transfer rate to the level of appropriate hospital within 30 minutes was 46.6% in South Korea. For this reason, the quality management of prehopital care in korea are required. The Purpose of this study is intended to improve the trauma care process of ems in pre-hospital in korea. The research subjects are the trauma patients transferred by Gang-won 119 Fire Department Ambulance in 2013. The methods are the data that is analyzed using the 119 ambulance recording sheets of trauma patients including structural indicators, process indicators and outcome indicators that reflect the process map (VSM: Value Stream Map) developed and analyzed. All transferred patient to the hospital emergency room in Gang-won Province during the entire year of 2013 results 66,282 and trauma patients were 30,887. Types of occurred accidents in trauma patients are 16,200 (53.0%), MVA (motor vehicle accidents) 8,789 (29.0 %), and others 5,593 (18.0 %), respectively. This study results the step-by-step problems and improvements occurring the report stage, mobilization phase, the field phase, transfer phase, the hospital phase in pre-hospital.
한국 교육복지정책의 전개 및 향후 과제에 대한 고찰 : 이돈희의 『교육정의론』을 중심으로
이수지(Lee, Suji),김새론(Kim, Searon),전주현(Jeon, Jyhyun),한지예(Han, Jiyea),황정훈(Hwang, Junghun),엄문영(Eom, Moonyoung) 한국교육행정학회 2021 敎育行政學硏究 Vol.39 No.1
본 연구는 이돈희의 『교육정의론』에 제시된 교육복지와 교육정의의 개념을 이론적으로 고찰하고, 이를 바탕으로 국내 주요 교육복지정책이 정의롭게 운영되고 있는지를 분석하여 향후 교육복지정책에 요구되는 과제를 제시하였다. 『교육정의론』에 따르면 교육복지란 교육정의 실현의 근본적인 출발점으로서 모든 교육대상의 교육적 욕구 충족과 자아실현을 위해 유의미한 학습경험을 제공하는 것이다. 이러한 교육정의의 관점에서 무상교육, 방과 후 학교, 학습부진학생 지원, 교육복지우선지원사업, 교육소외 취약계층 지원, 고등교육 학자금 지원 정책 등 6가지 국내 주요 교육복지정책의 운영을 분석하였다. 그 결과 추후 교육복지정책에 요청되는 과제로 ‘교육소외 취약계층을 위한 교육복지의 양적 확대’, ‘교육기회의 유의미성 보장을 위한 교육복지정책’, ‘특수요소 성장을 지원하는 교육복지정책 예산 확충’, ‘수혜 대상 범위에 대한 공감대 형성’, ‘모든 학생을 대상으로 하는 교육복지정책 지향’을 제시하였다. 본 연구는 이돈희의 『교육정의론』에 관한 이론적 고찰과 정책 분석을 병행함으로써 ‘교육정의’에 대한 관심을 촉구하고, 교육복지정책이 나아갈 정의로운 방향 제시에 기여하고자 하였다. This study theoretically contemplated the concepts of educational welfare and educational justice presented in Lee, Don-hee"s 『Theory of Education Justice』, and analyzed whether major educational welfare policies in Korea are operating equitably, presenting the tasks required for future educational welfare policy making. According to the 『Theory of Education Justice』, educational welfare is a fundamental starting point for the realization of educational justice, providing meaningful learning experiences for the fulfillment of educational needs and self-realization of all educational subjects. From this perspective, six major domestic educational welfare policies were analyzed, including free education, after-school support policies, poor student support, education welfare priority support projects, support for the disadvantaged underprivileged, and higher education funding policies. As a result, the government proposed ‘Quantitative expansion of educational welfare for the underprivileged’, ‘Educational welfare policy to guarantee the significance of educational opportunities’, ‘Expansion of educational welfare policy budget to support growth of special demand’, ‘Forming a consensus for the scope of beneficiaries’, and ‘Oriented educational welfare policy for all students’. This study encouraged interest in ‘education justice’ by combining theoretical consideration of Lee, Don-hee"s 『Theory of Education Justice』 and contributed to the just direction for education welfare policy.
Lee, Junghun,Lee, Sungjin,Kim, Jonghun,Song, Doosam,Jeong, Hakgeun Elsevier 2017 Energy and buildings Vol.149 No.-
<P><B>Abstract</B></P> <P>Simulations are widely used to calculate the thermal environment and energy consumption of buildings. The results of these simulations are affected by weather data, thus making the selection of appropriate weather data essential. Typical weather data are used to analyze a building’s thermal performance, but this is not appropriate for analyzing the performance of an actual building controlled by a building energy management system, which responds to real-time weather conditions. Such a building needs short-term weather forecast data to calculate the energy consumption. However, an evaluation of the validity of weather forecast data has not been performed. This study quantitatively analyzes the validation of real-time weather forecast data. A middleware platform was developed to combine weather forecast data and the EnergyPlus software using Grasshopper software. In addition, weather forecast data and actual weather data were compared to evaluate the forecast validation and a predictive control method using weather forecast data was devised. The application of real-time control was found to reduce the electricity costs incurred for cooling by 10% relative to there being no control, and by 2% relative to fixed temperature control.</P>