설문조사에 근거한 전자파 발생원 주변 주민과 비주변 주민의 건강수준 평가

전형진,김윤신,윤정호,조남욱,손승우,Jeon, Hyung Jin,Kim, Yoon Shin,Yoon, Jeong Ho,Cho, Nam Wook,Son, Seoung Woo 한국환경보건학회 2014 한국환경보건학회지 Vol.40 No.5

Objective: The purpose of this study is to compare the health status of residents who were exposed to sources of extremely low frequency electromagnetic fields (ELF-EMFs) in the living environment and those who were not exposed to such a source of ELF-EMFs through a survey designed to appraise the residents' health levels. Method: Aimed at 251 residents exposed to a source of ELF-EMFs and 278 residents not exposed to a source, the survey was conducted to investigate the health status of the residents on the basis of questionnaire SF-36. Result: The health status scores of residents exposed to ELF-EMFs turned out to be lower than those of their counterparts. In terms of self-reported symptoms related to health and sleep quality, residents exposed to ELF-EMFs were found to have a higher complaint rate of self-reported symptoms such as dizziness, depression, and fatigue. Regarding sleep disorders, residents exposed to ELF-EMFs appeared to have a slightly higher complaint rate of sleep disorders compared to non-exposed residents. Conclusion: If a region is to be exposed to a source of ELF-EMFs, a more proactive policy for reducing such exposure is advised. In addition, it is necessary to better understand problems of residents by emplacing an ELF-EMFs risk information delivery system and building an efficient communication system for voluntary participation during the construction phase.

겨울철 가정의 에너지 사용량과 실내환경 인자의 상관성에 관한 조사

전형진(Hyung Jin Jeon),김윤신(Yoon Shin Kim),이정원(Jung Won Lee),이철민(Cheol Min Lee),조용성(Yong Sung Cho),김기연(Ki Youn Kim) 한국실내환경학회 2011 한국실내환경학회지 Vol.8 No.4

The purpose of this study were to investigate the state of indoor environmental factors and energy consumption during winter in residential houses and to analyze factors which influenced this environment. Energy consumptions and indoor environmental factors of this survey were conducted in 21 houses(apartment; 11 and detached houses;10) between December, 2010 and February, 2011 which measured energy consumptions and indoor environmental factors as well as kept records of interviews with residents and other related factors. The results obtained were as follows. Indoor environmental factors which were found to influence apartment houses higher than detached houses. The average gas consumption of detached houses(90.98㎥) was higher than that of apartment houses(76.33㎥). Gas consumption showed positive correlations to temperature and carbon dioxide in the residential houses. The mean concentration of PM₁₀, and CO₂ in large family were higher than those of small family. We found that the more gas consumption, the higher concentration of PM₁₀, CO₂ and temperature(p<0.01).

수송기술에 관한 창의적 문제해결 능력을 함양하는 하이퍼루프 주제기반의 문제의 구조화 수준별 문제해결 체험활동 중심 수업 설계

전형진(Hyung-jin JEON),이상봉(Sang-bong YI) 대한공업교육학회 2022 대한공업교육학회지 Vol.47 No.2

이 연구의 목적은 수송기술에 관한 창의적 문제해결 능력을 함양하는 하이퍼루프 주제기반의 문제의 구조화 수준별 문제해결 체험활동 중심 수업의 설계를 위한 것으로 타일러의 수업 설계 4단계를 적용하여 수업을 설계하였으며, 각 단계를 통해 이루어진 수업 설계는 다음과 같다. 학습 목표의 설정 단계에서는 문헌 고찰을 통하여 학습자 요구, 환경요인, 문제의 구조화 수준, 수송기술 문제해결 체험활동 등을 분석하여 최종 주제로 ‘하이퍼루프’를 선정하고 학습 목표를 도출하였다. 학습경험의 선정 단계에서는 학습자의 수준을 고려하고 학습 목적을 달성하기 위한 과제를 선정하여 과제의 구조화 수준, 구조화 수준별 세부 목표 등을 설정하였으며, 학습경험의 조직 단계에서는 구조화 수준별 활동 내용 조직, 지도 방법, 수업 활동 및 유의사항, 수업단계와 절차, 단계별 시간 배정, 그리고 교수자료와 학습자료 등을 설계하였다. 학습 성과의 평가 단계에서는 평가도구를 개발하였다. 설계된 수업은 신뢰도와 타당도를 검증하기 위해 기술 교육 분야 전문가와 하이퍼루프 분야 현장 전문가 자문을 통해 수정·보완하여 총 10차시로 수업을 설계하였다. The purpose of this study is to design a class focused on problem-solving experiential activities by level of structuring of hyperloop topic-based problems that cultivate creative problem-solving skills related to transportation technology. The lesson design made through each stage is as follows. In the learning goal setting stage, through literature review, learner needs, environmental factors, problem structuring level, transportation technology problem solving experience activities, etc. were analyzed to select "hyperloop" as the final topic and derive learning goals. In the learning experience selection stage, the level of structuring of the task and detailed goals for each structuring level were set by considering the learner"s level and selecting tasks to achieve the learning purpose. , class activities and notes, class steps and procedures, time allocation for each step, and teaching materials and learning materials were designed. In the evaluation stage of learning outcomes, evaluation tools were developed. In order to verify the reliability and validity of the designed class, a total of 10 classes were designed by modifying and supplementing them with advice from experts in the field of technical education and field experts in the field of hyperloop.

이산 여현 변환 계수의 오류 은폐 기법의 성능 비교

전형진(Hyung-jin Jeon),함철희(Cheul-hee Hahm),김재균(Jae-kyoon Kim) 한국통신학회 1993 한국통신학회 학술대회논문집 Vol.1993 No.11

남성 필라테스 지도자가 겪는 역할 수행의 어려움과 극복 전략

전형진 ( Jeon Hyung-jin ),이근모 ( Lee Keun-mo ),장승현 ( Jang Seung-hyun ) 한국체육학회 2022 한국체육학회지 Vol.61 No.1

본 연구는 남성 필라테스 지도자가 겪는 어려움 그리고 극복·적응전략을 들여다보고자 했다. 이러한 목적 달성을 위해 사례 연구를 실시하였다. 그 결과, 첫째, 남성 필라테스 지도자의 어려움으로는 ‘여성중심의 근무환경’, ‘여성 회원과의 거리두기’, ‘여성들만의 그룹 문화’가 도출되었다. 둘째, 남성 필라테스 지도자의 전략으로는 ‘여성화 또는 무성화 전략’, ‘여성 지도자와의 협업’이 도출되었다. 이러한 결과는 여성 중심의 필라테스 조직사회에서 남성 지도자의 현실을 들여다볼 수 있게 해주었으며 그들의 고충, 어려움, 전략을 확인시켜주었을 뿐만 아니라 역설적이게도 그 동안 여성들이 남성 중심의 스포츠 내에서 얼마나 힘들었을지, 또 얼마나 부당한 처우를 받아왔을지 돌아보게 하는 계기를 제공해 주었다. 결국 이로 인해 우리는 남성 필라테스 지도자의 상황과 삶을 조금이나마 이해할 수 있었으며, 또 한편으로 스포츠, 운동 조직 내 소수자의 삶을 이해할 수 있었다. The purpose of this study was to observe the difficulties and strategies to overcome·adapt to such environment. In order to achieve such goal the study proceeded with case study. As a result, ‘female-centric work environment’, ‘required distancing from female members’, ‘female exclusive group culture,’ were observed as difficulties experienced by male pilates instructors. ‘feminization or asecualitzation strategies’, ‘collaboration with female instructors’ were observed as the strategies of male pilates instructors. Such results allows us to see through the reality faced by male instructors as they work in a female-centric pilates community and confirms the distress, difficulties, and strategies these male instructors must overcome and come up with. Furthermore, these results ironically provides an oppportunity to reconsider the unfair treatment females must have experienced within the boundary of male-centric sports. In conclusion, the results of this study allowed us to understand the circumstances faced by male pilates instructors as well as the lives of the minority group within sports and organizations within sports.

초분광센서를 활용한 이산화질소 농도 추정식에 관한 연구

전의익(Eui-Ik Jeon),박진우(Jin-Woo Park),임성하(Seong-Ha Lim),김동우(Dong-Woo Kim),유재진(Jae-Jin Yu),손승우(Seung-Woo Son),전형진(Hyung-Jin Jeon),윤정호(Jeong-Ho Yoon) 한국산학기술학회 2019 한국산학기술학회논문지 Vol.20 No.6

국내 산업단지에서 배출되는 대기오염물질의 모니터링을 위해 굴뚝원격감시시스템이 운영되고 있으나 대상 시설이 한정적이어서, 시스템이 설치되지 않은 시설은 단속 요원이 직접 모니터링 및 단속을 수행하고 있다. 그래서 효율적인 산업단지에서 배출되는 대기오염물질의 모니터링을 위해 다양한 센서를 활용한 연구들이 수행되고 있다. 이에 따라 본 연구에서는 초분광센서로 측정할 수 있는 분광복사량을 활용하여 대기오염물질 중 이산화질소의 농도를 추정할 수 있는 공식을 개발하고 검증하였다. 농도 추정식 개발을 위해 다양한 농도의 이산화질소를 대상으로 태양천정각, 관측천정각, 상대방위각을 다르게 하여 분광복사량을 관측하였다. 관측된 분광복사량에서 특정 파장 간의 값의 차이를 흡수 깊이로 하였으며, 흡수 깊이와 이산화질소 농도와의 관계를 이용하여 농도 추정식을 개발하였다. 그리고 개발된 농도 추정식들의 검증을 위해 이산화질소와 아황산가스가 혼합된 가스를 대상으로 측정한 분광복사량을 이용하였다. 그 결과, 추정식의 형태에 따라 결정 계수와 RMSE가 0.71~0.88, 72~323 ppm으로 나타났으며, 지수 형태의 농도 추정식의 결정 계수가 가장 높게 나타났다. 추정식의 형태에 따라 농도의 변화에 따른 추정 농도의 정확도가 일정하지 않지만, 향후 농도 추정식의 고도화가 이루어진다면 초분광 센서를 활용하여 산업단지 배출되는 이산화질소의 모니터링에 사용 가능할 것으로 판단된다. The CleanSYS(Clean SYStem) is operated to monitor air pollutants emitted from specific industrial complexes in Korea. So the industrial complexes without the system are directly monitored by the control officers. For efficient monitoring, studies using various sensors have been conducted to monitor air pollutants emitted from industrial complex. In this study, hyperspectral sensors were used to model and verify the equations for estimating the concentration of NO2(nitrogen dioxide) in air pollutants emitted. For development of the equations, spectral radiance were observed for NO₂ at various concentrations with different SZA(Solar Zenith Angle), VZA(Viewing Zenith Angle), and RAA(Relative Azimuth Angle). From the observed spectral radiance, the calculated value of the difference between the values of the specific wavelengths was taken as an absorption depth, and the equations were developed using the relationship between the depth and the NO₂ concentration. The spectral radiance mixed gas of NO₂ and SO₂(sulfur dioxide) was used to verify the equations. As a result, the R2(coefficient of determination) and RMSE(Root Mean Square Error) were different from 0.71~0.88 and 72~323 ppm according to the form of the equation, and R<SUP>2</SUP> of the exponential form was the highest among the equations. Depending on the type of the equations, the accuracy of the estimated concentration with varying concentrations is not constant. However, if the equations are advanced in the future, hyperspectral sensors can be used to monitor the NO₂ emitted from the industrial complex.

마이크로 유체 원심분리기의 입구 조건과 챔버 크기에 따른 회전 유동 성능 평가

전형진(Hyeong Jin Jeon),권봉현(Bong Hyun Kwon),김대일(Dae Il Kim),김형훈(Hyung Hoon Kim),고정상(Jeung Sang Go) 한국가시화정보학회 2014 한국가시화정보학회지 Vol.12 No.1

This paper describes the measurement of performance evaluation of rotational flow varying chamber size and Reynolds number. Through the experimental visualization of the flow rotation, the number and position of flow rotation in the 2x2 microfluidic centrifuge were examined. At a chamber width of 250 ㎛, single flow rotation was obtained over at a Reynolds number of 300, while at a chamber width of 500 ㎛, single flow rotation did not appear. For performance evaluation, the intensity in microchamber was measured during 20 sec. At a chamber width of 250 ㎛, performance of rotational flow increased as Reynolds number increased. However, the variation of intensity in microchamber remained unchanged at a chamber width of 500 ㎛. The numerical analysis showed that the threshold centrifugal acceleration to obtain rotational flow for ejected particles was 200g.

UAS 기반 대형 폐기물 발생량 측정 가능성 모색

손승우,유재진,전형진,임성하,강영은,윤정호,Son, Seung Woo,Yu, Jae Jin,Jeon, Hyung Jin,Lim, Seong Ha,Kang, Young Eun,Yoon, Jeong Ho 대한원격탐사학회 2017 大韓遠隔探査學會誌 Vol.33 No.5

재난 등에서 발생하는 대형 폐기물에 대한 효율적인 관리가 지속적으로 요구되고 있다. 대형 폐기물은 환경과 밀접하게 연결되어 대기질이나 수질, 생활 환경 등에 악영향을 미치고 있다. 대형 폐기물이 발생하면 임시적환장으로의 이동이나 처리 등을 위해서 발생량을 추정할 수 있어야 한다. 현재까지 위성영상이나 폐기물의 원단위를 이용하여 발생량을 추정하고 있지만 그 정확성에 대한 의문이 지속적으로 제기되는 실정이다. 따라서 본 연구에서는 UAS를 기반으로 3차원 공간정보를 구축하고 폐기물 측정 및 정확도 평가를 목적으로 연구를 진행하였다. UAS를 이용하여 폐기물 지역을 측정한 결과, 3차원 공간정보의 X, Y, Z RMSE 수치는 각각 0.022 m, 0.023 m, 0.14 m로 비교적 높은 정확도를 보였다. 이를 기반으로 측정한 폐기물량은 약 $4,273,400m^3$로 도출되었다. 또한 과거부터 지형, 문화재 등 정밀한 측량에 사용된 지상 LiDAR를 이용하여 동일지역의 폐기물량을 측정하였으며 그 결과값은 약 $4,274,188m^3$로 도출되었다. UAS 기반으로 도출한 폐기물량과 크게 차이를 보이지 않았다. 이를 통해 UAS를 이용한 폐기물 발생량 측정에 대한 가능성을 확인할 수 있었으며 이는, 재해 폐기물이나 대형 폐기물 등의 환경관리에 유용하게 활용될 수 있을 것으로 사료된다. Efficient management of large-size wastes generated from disasters etc. is always in demand. Large-size wastes are closely connected to the environment, producing adverse effects on the air quality, water quality, living environment and so on. When large-size wastes are generated, we must be able to estimate the generated amount in order to transfer them to a temporary trans-shipment site, or to properly treat them. Currently, we estimate the amount of generated large-size wastes by using satellite images or unit measure for wastes; however, the accuracy of such estimations have been constantly questioned. Therefore, the present study was performed to establish three-dimensional spatial information based on UAS, to measure the amount of waste, and to evaluate the accuracy of the measurement. A measurement was made at a waste site by using UAS, and the X, Y, Z RMSE values of the three-dimensional spatial information were found to be 0.022 m, 0.023 m, and 0.14 m, all of which show relatively high accuracy. The amount of waste measured using these values was computed to be approximately $4,273,400m^3$. In addition, the amount of waste at the same site was measured by using Terrestrial LiDAR, which is used for the precise measurement of geographical features, cultural properties and the like. The resulting value was $4,274,188m^3$, which is not significantly different from the amount of waste computed by using UAS. Thus, the possibility of measuring the amount of waste using UAS was confirmed, and UAS-based measurement is believed to be useful for environmental control with respect to disaster wastes, large-size wastes, and the like.

한·중 농업정책시뮬레이션모형 구축 연구

한석호(Suk-Ho Han),전형진(Hyung-Jin Jeon),승준호(Jun-Ho Seung),이동필 한국농촌경제연구원 2011 한국농촌경제연구원 기본연구보고서 Vol.- No.-

With a 2010 population of more than 1.35 billion people, China is home to roughly 20 percent of the world’s inhabitants. This fact alone makes China’s demand for agricultural products a huge factor in how world prices of agricultural commodities behave. However, not only is China’s percentage of world population large, its share of world GDP is growing. With China’s real GDP expressed in U.S. dollars more than doubling from 2003 to 2010, China’s share of world GDP has increased from 4.0 percent in 2002 to 7.4 percent in 2010. Considering that agricultural producers in China are also facing constraints on the availability of land and water, which will make it difficult to sustain large increases in their agricultural production base, large jumps in demand for agricultural products within China could have profound effect on world markets, affecting other nations who are major suppliers or major importers of these goods. This study analyzed direct and indirect impacts of structural change in the supply and demand side of Chinese agriculture on the Korean economy based on the combination of the following models: China"s Agricultural Policy Simulation Model(CAPSIM), the modeling system of Food and Agricultural Policy Research Institute(FAPRI) at the University of Missouri-Columbia in the U.S., and Korea Agricultural Simulation Model (KREI-KASMO). In order to better understand the impact of Chinese agriculture and agricultural policies on Korean agriculture, we tried to forecast the long-term outlook of Chinese agriculture for 13 agricultural commodities on the supply and demand side based on CAPSIM through a co-project between the Chinese Academy of Agricultural Sciences (CAAS) and Korea Rural Economic Institute (KREI). Unfortunately, CAPSIM did not cover vegetables and fruits yet, so we tried to build structural models on these items and added some modules to CAPSIM to predict the future. In addition, through a co-project between Food and Agricultural Policy Research Institute at the University of Missouri-Columbia (FAPRI-MU) and KREI, this study calculated the global impact of China"s structural change in demand in terms of price and trade volume. This analysis considered how a 10 percent increase in China’s domestic consumption of seven different commodities(rice, corn, wheat, soybeans and soybean products, beef, pork and chicken) would impact the world prices of these products, internal Chinese prices, and production and consumption of these goods within China as well as the rest of the world. To assess the changes from stronger than expected income levels in China, an additional study is conducted in which China’s real GDP is allowed to increase 10 percent. It is important to note that this analysis assumes that any increase in Chinese domestic consumption above and beyond production increases results in increased net imports. While the government has a history of using trade barriers to protect China’s domestic industries(some industries have been protected more than others), this analysis assumes that all additional demand will be met by increases in Chinese production or more imports. No assumptions are made about increased levels of trade protection. We anticipate that this study is a meaningful first-stage project to establish a world model to prepare for various FTAs and make supply-demand projections on world grain market for stabilization of domestic prices.

연구논문 : 서울지역 겨울철 기온과 노인의 사망률간의 관련성 연구(1992년~2007년)

이정원 ( Joung Won Lee ),전형진 ( Hyung Jin Jeon ),조용성 ( Yong Sung Cho ),이철민 ( Cheol Min Lee ),김기연 ( Ki Youn Kim ),김윤신 ( Yoon Shin Kim ) 한국환경영향평가학회 2011 환경영향평가 Vol.20 No.5

This study was investigated the relationship between the temperature and the mortality of aged (≥65 yr) during the winter seasons from 1992 to 2007 in Seoul, Korea by utilizing climate data and death records. The study also estimated the future risks by employing the projections of the population in Seoul, Korea and climate change scenario of Korea from 2011 to 2030. The limitation of this study was the impossibility in the prediction of daily mortality counts. Therefore, daily death numbers could be predicted based on the future population projection for Korea and the death records of 2005. The result indicated that risks increased by 0.27%, 0.52%, 0.32% and 0.41% in association with the 1˚C decrease in daily minimum temperature from the mortality counts of total, respiratory, cardiovascular, and cardiorespiratory in the past date while 0.31%, 0.42%, 0.59% and 0.66% in the future. Based on the results obtained from this study, it is concluded that the risk in the future will be higher than the past date although there is an uncertainty in estimating death counts in the future.