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허베이 스피리트호 원유유출시 방제작업과 대사증후군의 연관성
이익진,장봉기,이종화,손부순,정해관,하미나,최영현,박명숙,Lee, Ik-Jin,Jang, Bong-Ki,Lee, Jong-Wha,Son, Bu-Soon,Cheong, Hae-Kwan,Ha, Mina,Choi, Young-Hyun,Park, Myungsook 한국환경보건학회 2015 한국환경보건학회지 Vol.41 No.5
Objectives: We aimed to assess the risk of metabolic syndrome one year after the 2007 Hebei Spirit oil spill in Taean, Korea among people exposed to spilt oil during clean-up work. Methods: A total of 6,923 adults, including 3,019 males and 3,904 females, participated in the study. Health examinations and blood tests (total cholesterol, triglycerides, HDL, fasting blood sugar) were performed. A logistic regression model adjusting for age, gender, smoking history, drinking history, income, education, and marital status was used to estimate the risk of metabolic syndrome associated with the level of oil spill exposure. Results: The prevalence of metabolic syndrome was 24.9% among males and 18% among females. Compared with people living within 20 km of the coastline, the risk of metabolic syndrome among people living within 0.8 km of the coastline was significantly higher (male OR=1.696, 95% CI=1.320-2.178, female OR=1.992, 95% CI=1.549-2.561), including a significant dose-response relationship for distance from early contaminate coastline (p<0.001). The risk of metabolic syndrome was higher according to the increase of duration of cleaning work. The risk of metabolic syndrome among people who participated in the clean-up work for more than 116 days, compared with people who participated in the cleaning work for or less 14 days, was significantly higher (male OR=1.845, 95% CI=1.448-2.353, female OR=1.752, CI=1.378-2.228), with a significant dose-response relationship for days of clean-up work (p<0.001). Conclusion: This study showed that there is a significant association between exposure to the oil spill during the clean-up work, distance from early contaminate coastline and the risk of metabolic syndrome in a doseresponse manner.
이익진 ( Ik Jin Lee ),안규동 ( Kyu Dong Ahn ),조광성 ( Kwang Sung Cho ),김남수 ( Nam Su Kim ),이성수 ( Sung Su Lee ),이병국 ( Byung Kook Lee ) 한국산업위생학회 2004 한국산업보건학회지 Vol.14 No.3
This study is to find out which the elements could cause the pollution in the soil, and to what the degree of the pollution has been progressed so far, with samples of the soils from such work places as 6 lead storage battery factories, a primary lead smelting factory, and a litharge factory, and finally from the area that is considered not to have been polluted by any industrial activities. The study variables are the number of employees, the date of foundation of workplace, the amount of use of lead, the size of the land, the size of facilities, and the capacity of dust collector. We inspected the accuracy and the precision of the portable X-ray Fluorescence which has been rarely used in this nation. Followings are the details of our inspection. 1. For the verification of the accuracy and the precision, we prepared three different concentrations. For the accuracy, we had 219.6% collection rate from low concentration, 97.8% from middle concentration, and 101.4% form high concentration. We found the variation modules by concentration, for the precision, to be 23.1% from low concentration, 1.91% from middle concentration, and 0.66% from high concentration, the result of which shows us that the portable X-ray fluorescence`s accuracy and precision are somewhat low with low concentration, and high with middle or high concentration. 2. The lowest level of pollution in workplace caused by lead was that of D company`s with its average concentration was 182±2.512mg/kg the highest, C company`s with 72,069±2.548mg/kg. 3. We studied the association the date of foundation of workplace, the amount of use of lead, the size of the land, the rate of the building occupation of the land, lead amount in the soil, the capacity of the dust collector and devided the capacity of the dust collector by the size of the building to find out the relation between the dust collector`s affection per unit area and the rate of lead in the soil. From this study, which indicate the older the date of foundation of workplace, the smaller using lead, occupation of the land, the building occupation of the land, the capacity of the dust collector, the rate of the dust collector`s affection per unit area. 4. We made a comparitive study of only the groups of the storage battery company in the same way as above. From this study, we had almost the same result as we did from the study on the whole lead-related workplaces; the only different results we got from the variation of the amount the number of employees, which indicates the bigger the number of employees, the less soil pollution. It shows and the result is statistically worthy of attention(p<0.05). Is judged that use about utilization because it analytical accuracy and precision are high and have a lot of advantages about free medical care pretreatment and sample ore that analysis is difficult with galena specially in concentration more than constant level to inflect portable XRF in measurement about lead concentration among soil in place of business and estimation.
이동희(Lee, Dong-hee),이익진(Lee, Ik-jin),서효원(Seo, Hyo-won) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
Oil plant is a important industry structure creating a high added-value and producing a energy source. The design for these structure is always sturdy to ensure the safety against failures. However, there are various factors that can damage the structure in the process of refining petroleum. So, It is necessary to monitor the health of the structure in real-time. In this paper two methods for detecting the structural damage are compared to estimate the accuracy. the first method is modal-based method utilizing natural frequency and mode shape of the structure. the second method is responses-based method that is based on measured frequency response from multiple sensors. To consider that sensors can be used restrictively, Optimization of the position and number of measurement sensors is introduced to obtain plentiful information of the structure.
허베이 스피리트호 유류 유출이 초등학생들의 알레르기 질환 유병률에 미친 영향
전용진 ( Yong-jin Jeon ),장봉기(교신저자) ( Bong-ki Jang ),이익진 ( Ik-jin Lee ),이종화 ( Jong-wha Lee ),손부순 ( Bu-soon Son ),정해관 ( Hae-kwan Cheong ),하미나 ( Mi Na Ha ),최영현 ( Young-hyun Choi ),박명숙 ( Myung Sook Park ),이승 대한보건협회 2016 대한보건연구 Vol.42 No.2
연구목적: 본 연구는 2007년 12월 7일 크레인 부선과 유조선 허베이 스피리트호가 충돌해 원유가 유출된 사고에 따른 인접한 지역 내 초등학생을 대상으로 유류노출과 알레르기 질환과의 관련성을 알아보았다. 연구방법: 지리정보 시스템을 활용하여 사고 지점으로부터 거주지까지 20 km 안쪽에 거주하는 학생을 고노출군, 20 km초과 거주자를 저노출군으로 분류하고, 방제작업 참여여부에 따라 노출수준을 분류하여 ISAAC 설문과 피부단자 검사를 사고1년 6개월이 지난 시점에서부터 실시하였다. 연구결과: 조사 대상자의 지난 12개월 동안의 알레르기 증상경험 유병률은 천식이 9.4%, 알레르기성 비염 39.1%, 알레르기성 피부염 17.0%, 알레르기성 결막염 13.6%로 나타났다. 알레르기성 질환에 영향을 줄 수 있는 다른 환경요인을 통제하여 유출 유류 노출 강도에 따른 영향만을 보기 위하여 혼란요인을 보정한 후 분석한 결과, 사고지점으로부터 거주지까지의 거리에 따른 지난 12개월 동안의 알레르기성 비염의 교차비(odds ratio)가 저노출군보다 고노출군에서 1.88배(95% CI: 1.08 -3.29) 높은 것으로 나타났다(p<0.05). 알레르기성 질환에 영향을 줄 수 있는 다른 요인을 보정한 후, 방제작업 참여유무에 따른 알레르기성 질환 유병률의 차이를 분석한 결과, 지난 12개월 동안의 알레르기성 비염의 교차비가 미방제작업군보다 방제작업군에서 1.93배(95% CI: 1.12 - 3.30) 높은 것으로 나타났다(p<0.05). 결론: 초등학생의 알레르기 질환 중 알레르기성 비염의 경우 노출군에서 유의하게 높은 위험도를 나타내었으며, 전체적으로 유류 유출 피해지역에 거주하는 초등학생의 알레르기 질환의 유병률이 높은 것으로 보아 유류 유출이 초등학생의 알레르기성 비염 발생에 일부 영향을 미쳤을 것으로 생각된다. Objective: The relationship between the degree of oil spill exposure and the allergy prevalence rate of elementary school child living nearby the spot where the crude oil was spilled from the collision between the Korean crane barge and registered oil tanker Hebei Spirit on December 7, 2007. Methods: The research was conducted by dividing the subjects into two groups of the highly exposed and the low exposed according to the distance from the point of accident to their residence, and categorizing the oil exposure degree depending on the participation in clean-up works, with the ISAAC questionnaire and skin prick testing. Results: The allergy prevalence rate of the subjects for the last 12 months stood at 9.4% for asthma, 39.1% for allergic rhinitis, 17.0% for atopic dermatitis, 13.6% for allergic conjunctivitis. The study revised general confusion factors for allergic to analyze environmental factors that may influence allergic. In terms of the prevalence rate of allergic rhinitis by distance, the highly exposed group suffered allergic rhinitis 1.88 times (95% CI: 1.08 - 3.29) more than the low exposed group for the past 12 months, with significant relationship (p<0.05). In terms of the rate by participation in clean-up activities, the participated group experienced allergic rhinitis 1.93 times (95% CI: 1.12 - 3.30) more compared to the other (p<0.05). Conclusion: This study that the allergic diseases of the elementary school child living in the oil spill area would have posed a threat to their health.
모델기반 MATLAB/Simulink의 자동 코드 생성과 코드 분석
최혜원(Hye-Won Choi),이익진(Ik-Jin Lee) 대한전자공학회 2021 대한전자공학회 학술대회 Vol.2021 No.6
As the embedded system became more functional, the development process became complicated. As a result, the number of cases of model-based design-based development is increasing. In this paper, the impact of various options was analyzed when automatically generating code from models in the MATLAB and Simulink domains. We also analyzed the impact of settings complying with ISO 26262 and MISRA rules. In fact, as a result of automatically generating code with default settings in the MATLAB and Simulink domains, a problem was found that undermined the intention of the developer. This study has been analyzed for various options in model-based design, and conveys what to keep in mind during the development process.