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전현석(Hyun-Seok Jeon),최현중(Hyoun-Jung Choi),최경석(Gyoung-Seok Choi),강재식(Jae-Sik Kang),이승언(Seung-Eon Lee) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
Recently, some major environmental problems are the increase of fossil fuel price and CO₂ emission. To solve these problems, it is imperative to develop eco-friendly techniques and to reduce energy consumption in apartment complexes. Therefore, an effective system for insulation needs to be developed to reduce energy consumption. This study compares thermal characteristics between general insulation and super insulation Vacuum Panel, which is thinner and has more insulation efficiency.
포스터 : C언어 기초 학습을 위한 문제 설계 및 운영
전현석 ( Hyun Seok Jeon ),정종광 ( Jong Kwang Jeong ),김성식 ( Sung Sik Kim ) 한국컴퓨터교육학회 2014 한국컴퓨터교육학회 학술발표대회논문집 Vol.18 No.1
본 연구에서는 텍스트 기반 일반 프로그래밍 언어인 C 언어의 내용 체계를 교육적 관점과 목적으로 재구성하기 위해, 일반 언어의 학습 과정과 유사한 소스코드 제시, 소스코드 사용, 소스코드 수정, 소스코드 응용 및 결합, 소스코드 설계 단계의 전략으로 문제 상황을 구였다. 그 내용을 시공간적인 편의성과 즉각적인 피드백, 몰입도 등의 장점을 가지고 있는 온라인 채점 시스템을 활용해 제공함으로서, 얼마나 빠른 시간 내에 C 언어의 기초를 효과적으로 학습할 수 있는지를 알아보고자 하였다.
한국형 패시브하우스를 위한 단열블럭시스템의 열성능 평가
전현석(Jeon Hyun-Seok),최경석(Choi Gyeong-Seok),강재식(Kang Jae-Sik),이승언(Lee Seung-Eon) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(계획계)
Thermal insulation performance of building envelope is a key factor to reduce building energy consumption. Currently, most residential buildings are constructed by internal insulation method. Internal insulation method causes heat loss through thermal bridge effect, while it is economic and excellent in construction efficiency. In particular, heating energy loss is inevitable in 'ondol' system. External insulation method can minimize heat loss through thermal bridge effect. But domestic technologies for external insulation is not competitive in construction method and materials compare to developed countries. Thus, in spite of rising market demand for external insulation method to achieve energy efficiency, applicable technologies are insufficient. Therefore, this study evaluated the thermal performance of high density EPS insulation block wall system, which was developed to design a Korean passive house, during winter season as a mock-up test.
컴퓨터과학 및 교육 2 : 개념과 원리를 기초로 한 C언어 교수학습
전현석 ( Hyun Seok Jeon ),김지선 ( Ji Seon Kim ),김길모 ( Kil Mo Kim ),김성식 ( Seong Sik Ki ) 한국컴퓨터교육학회 2011 한국컴퓨터교육학회 학술발표대회논문집 Vol.15 No.2
그동안의 C언어 교수학습과 관련한 연구들은 C언어의 문법과 형식, 제어문, 자료구조 등을 효과적으로 교수학습 하는 것에 초점이 맞추어져 있으며, 그러한 교수학습을 돕기 위한 학습 시스템이나 로봇과 같은 도구들을 활용하는 것이 중심이 되었다. 하지만 학습자들에게 제시되는 문법, 형식, 제어문, 구조 등은 어느 정도의 경험자에게는 효과적인 내용 체계로서의 역할을 하게 되지만, 프로그래밍언어를 처음 접하는 학습자들은 코드 작성의 원리나 개념을 이해하지 못하고 기계적인 문법과 사용법에 대한 단순 암기 학습으로 인식되기 쉽다. 1970년대 C언어가 개발되어 소개된 이후, C언어의 개발과 함께 제공된 C언어 매뉴얼의 내용 체계를 그대로 교육하는 것은, 어느 정도의 지식과 경험을 가지고 있는 성인들에게는 적합하면서도 효과적인 방법일 수 있다. 하지만 하드웨어에 대한 지식, 프로그래밍의 개념과 원리에 대한 지식이나 프로그래밍 경험이없는 학생들에게는 매우 생소한 추상적 개념들과 복잡한 문법체계가 제시되는 난해한 언어로 받아들여지기 쉽다. 이에 본 연구에서는 프로그래밍을 처음 배우는 학생들이 이해하기 쉽도록 기존의 C언어 내용 체계를 재구성하고, C 코드 작성의 원리와 추상적 코드를 이해하는데 도움이 되는 개념들을 함께 제시함으로서 보다 쉽게 C언어를 학습할 수 있도록 하였다.
복토저장고의 환기 팬설치에 따른 내부온도 변화에 대한 연구
전현석(Jeon Hyun-Seok),황우진(Hwang Woo-Jin),윤성도(Yoon Sung-Do),손장열(Sohn Jang-Yeul) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
In case of earth-covered storages, condensation mainly occurs on surface of walls and stores in a hot season with high humidity. Also, condensation occurs in ground storages with similar environment. Condensation caused corrosion of stores, and mold. Therefore, the preventive plans should be considered to protect stores from corrosion in earth-covered storages. The study was performed at the magazine of igloo type which has a similar environment in a hot season. A ventilation fan was installed at the exhaust opening to conduct forced ventilation and increase the indoor temperature. The surface and indoor temperature were measured.
전현석(Jeon Hyun-Seok),최경석(Choi Gyeong-Seok),강재식(Kang Jae-Sik),이승언(Lee Seung-Eon) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(계획계)
Lately, construction of large and high-rise buildings has steadily increased and in accordance with this trend, various envelope systems were developed. However. insulation methods applying to the envelope are insufficient, which cause interstitial condensation, energy losses, and discoloration of walls resulted from unappropriated construction. In this study, Ventilated Insulation System was used to consider conduction, convection, and radiation simultaneously. This research performed a field experiment to evaluate insulating performance comparing Ventilated Insulation System with Non-Ventilated Insulation System in winter.
전현석(Hyun-Seok Jeon),최현중(Hyoun-Jung Choi),최경석(Gyoung-Seok Choi),강재식(Jae-Sik Kang),이승언(Seung-Eon Lee),정광섭(Gwang-Seop Jeong) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
Elastomeric Flexible Cellular Insulation is widely used in construction fields to prevent condensation and frozen pipes, reduce energy, and improve insulation. However, when Elastomeric Flexible Cellular Insulation has been installed in buildings in Korea, there was no standardization, which resulted in heat loss Therefore, insulation design standards need to be developed and from these standards, pipe insulation should be improved to increase its efficiency. This study estimates temperature and surface-emissivity according to the thickness of insulation to evaluate thermal performance
하절기 이글루 탄약고에서 동력팬 설치에 따른 결로 방지 효과
전현석(Hyun-seok Jeon),윤성도(Sung-Do Yoon),손장열(Jang-Yeul Sohn) 한국생활환경학회 2008 한국생활환경학회지 Vol.15 No.2
This study aims to evaluate the effect of forced ventilation method on condensation prevention in Igloo-shaped ammunition depot by field experiment. Condensation on the concrete surface and cartridge surface in Igloo-shaped ammunition depot during the summer can cause rust on the cartridge surface and problem in ammunition peformance. Therefore the field experiment was performed to prevent condensation by increasing surface temperatures of structure and ammunition higher than dew point through forced ventilation during the summer when outdoor temperature becomes higher than indoor temperature of ammunition depot. 8400 CMH forced exhaust fan was installed to introduce outdoor air quantity equivalent to the heat storage of structural bodies. The results of this study are follows; (1) Forced ventilation is judged to be necessary because natural ventilation fan can't increase indoor temperature. (2) The assumption on heat storage used for field experiment was verified as proper. (3) The optimal locations of exhaust and supply to decide air flow should be considered to enhance ventilation effect.
강제 환기에 의한 하절기 복토(覆土) 저장고 결로 방지 대책
황우진(Hwang Woo-Jin),전현석(Jeon Hyun-Seok),윤성도(Yoon Sung-Do),박선효(Park Sun-Hyo),손장열(Sohn Jang-Yeul) 한국건축친환경설비학회 2007 한국건축친환경설비학회 학술발표대회 논문집 Vol.- No.-
In case of earth-covered storage, the condensation occurs on surface of wall and stores in a hot season with high humidity because of low temperature of constructional mass. Therefore, the preventive plans should be considered to protect stores from the damage by corrosion in earth-covered storages. The study was performed at the Magazine of igloo type which is similar to earth-covered storages. A fan was installed at the air outlet for exhaust gas to conduct forced ventilation. The surface and indoor temperature were measured, and then the influence of those on condensation was analyzed. The results of this research are follows; 1) Forced ventilation by a fan affects the rise in surface temperature of walls and stores. 2) The condensation on surface of walls and stores was reduced after operating a fan.