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고압 송전선로 주변에 위치한 초등학교 학생들의 극저주파 자기장 노출량 예측 모델에 관한 연구
김윤신,현연주,최성호,노영만,홍승철,Kim, Yoon-Shin,Hyun, Youn-Joo,Choi, Seong-Ho,Roh, Young-Man,Hong, Seung-Cheol 한국환경보건학회 2006 한국환경보건학회지 Vol.32 No.5
The objectives of this study were to evaluate personal exposure estimated using a time activity pattern and microenvironmental model. The study was carried out for 44 children attending a primary school nearby the lines (school A) and 125 children attending a school away from 154 kV power lines (school B). For children attending school A, the estimated personal level was a little weak correlated with the measured level($Pearson\;r\;=0.34{\sim}0.35$). For children attending school B, the correlation was very low ($Pearson\;r\;=\;0.09{\sim}0.16$) using the TW A Model II, otherwise, TWA Model II-I which considered the average residential MF level according to the distance from the power line and home explained $39{\sim}53%$ of the correlation in MF personal exposures. The estimated personal exposure level was very well represented by the measured exposure level using TWA Model II-2 which consisted on spot and 24 h stationary measurements at subject's home ($Pearson\;r\;=\;0.65{\sim}0.85$). In conclusion, personal magnetic field expsoure estimated using a TWA Model II-2 should be provided for a reasonable estimate of measured exposure in schoolchildren living near the power line.
김윤신(Yoon-Shin Kim),현연주(Youn-Joo Hyun),조용성(Yong-Sung Cho),최성호(Sung-Ho Choi),이규수(Kyu-Soo Lee),홍승철(Seung-Cheol Hong) 한국실내환경학회 2005 한국실내환경학회지 Vol.2 No.1
Electromagnetic fields of all frequencies represent one of the most common and fastest growing environmental influences, about which anxiety and speculation are spreading. All populations are now exposed to varying degrees of electromagnetic field, and the levels will continue to increase as technology advances. The objectives of this study were to measure and analyze emitting characteristics of extremely low frequency electromagnetic field at micro-environments. We measured magnetic field at microenvironments such as home, school, educational institute, internet pc game room for children attending the primary school. The range of time weighted average (TWA) of 60 ㎐ EMF in micro-environment were 0.26~7.62 mG and the highest TWA 7.62 mG was measured in PC room possessed more than 50 computers. We will measure personal exposure levels of primary students and analyze correlation between major micro-environments and personal exposure level.
전기제품 및 주거환경에서의 극저주파 영역 자기장 방출수준에 관한 조사
김윤신(Yoon Shin Kim),현연주(Youn Joo Hyun),이철민(Chul Min Lee),최성호(Sung Ho Choi),노영만(Young Man Roh),조용성(Yong Sung Cho),홍승철(Seung Cheol Hong) 한국실내환경학회 2006 한국실내환경학회지 Vol.3 No.1
In this paper, exposure levels of electromagnetic field were measured in residential environments and from appliances. First, the measurements of residential environments were taken in central locations in bedroom, living room, and kitchen in each home. Both arithmetic and geometric mean of normal-power condition are higher than low-power condition (all electrical devices turned off/unplugged), and the background fields in homes show a geometric mean of about 0.022 uT. Second, we measured broadband magnetic fields of domestic appliances at various distances. The highest magnetic field is 44.3 uT from the microwave oven, and the lowest is 1.4 uT from the Kimchi Refrigerator. The magnitude of magnetic fields from appliances dropped off at a rate inversely proportional to distance, but the ratio of drop-off on Korean appliances is lower than US and UK.
인천시 대기오염과 일별 사망의 상관성에 관한 시계열적 연구(1998년~2001년)
조용성(Yong-Sung Cho),이종태(Jong- Tae Lee),김윤신(Yoon-Shin Kim),현연주(Youn-Joo Hyun),문정숙(Jeong-Suk Moon) 대한환경위생공학회 2003 대한환경위생공학회지 Vol.18 No.3
This study is performed to examine the relationship between air pollution exposure and mortality in Incheon for the years of 1998 - 2001. Daily counts of death were analyzed by general additive Poisson model, with adjustment for effects of seasonal trend, air temperature, humidity, and day of the week as confounders in a nonparametric approach. Daily death counts were associated with CO(l day before), O₃(2 day before), PM10(l day before), NO₂(l day before), SO₂(l day before). Increase of 32.21㎨(interquartile range) in PM10 was associated with 1.9 % (95% CI = 0.8 % - 2.9 %) increase in the daily number of death. This effect was greater in children (less than 15 aged) and elderly(more than 65 aged). We concluded that Incheon had 2 - 4 % increase in mortality in association with IQR in air pollutants. Daily variations in air pollution within the range currently occurring in Incheon might have an adverse effect on daily mortality. These findings also support the hypothesis that air pollution, at levels below the current ambient air quality standards of Korea, is harmful to sensitive subjects, such as children or elderly.
간이 폐기능측정기 (mini-Wright)와 비강세척액 (Nasal Lavage)을 이용한 대기오염물질과 호흡기 건강영향 분석
이종태,정용,현연주,조혜련 한국환경독성학회 1999 환경독성보건학회지 Vol.14 No.1
A large number of studies have indicated associations between the impairment of respiratory health and exposure to ambient air pollutants such as ozone (O₃), nitrogen dioxide (N0₂), sulfur dioxide (S0₂), particulate matters (PM_(10)). To evaluate this associations, we used the pulmonary function tests (peak expiratory flow rate: PEFR) by mini-wright peak flow meter and counting neutrophils in the nasal lavage (NL) as biomarker. From 15 June to 16 July 1998, for the workers in the highway tollgates, PEFR and NL were measured three times daily and twice per week, and association between the level of air pollutants and PEFR and NL were analyzed using the multiple regression model and the poisson regression model respectively. The results indicated that the effects of all measured air pollutants (SO₂, NO₂, O₃, PM_(10)) were not significantly associated with the value of PEFR. On the other side, S0₂, NO₂, PM_(10) were significantly associated with the number of neutrophils in NL. The increase in SO₂, N0₂ of 10ppb and in PM_(10) of 10μg/m³ was associated with 24%, 21%, 35% increases in neutrophil counts. But the ozone exposure was not associated with NL.
생산 가능한 토지면적산정기법을 이용한 지속성 평가에 대한 연구 : 제주도 지역을 중심으로
김용범,정용,현연주 한국환경영향평가학회 1997 환경영향평가 Vol.6 No.2
The object of this study is the introduction and the application of Ecological Footprint(EF) for sustainability of regional people activities. It is a tool for the evaluation of specific projects through various lifestyles or consumption to area of broad policy and budgets. But in Korea there is no assessment for consumption level of human activities by EF. Therefore this study try to analyse ecologically productive land for human activities of Cheju-island in order to assess the sustainability in Cheju and compares with another industrized countries. We analyze the human activities level of Cheju-island then the EF is about 0.9 (ha/cap). This value is not more than another countries like Canada and United States. EF assists in choosing technologies, policies and Life Cycle Assessment(LCA) which can perform a certain task with the smallest ecological footprint. It will help society to avoid collapse and move towards sustainability and ecological efficiency.
광주시 대기오염과 일별 사망의 상관성에 관한 시계열적 연구 : 1998~2001년
조용성,이종태,김윤신,현연주,박원석 대한보건협회 2003 대한보건연구 Vol.29 No.2
This study is performed to examine the relationship between air pollution exposure and mortality in Gwangju for the years of 19% - 2001. Daily counts of death were analyzed by general additive Poisson model, with adjustment for effects of seasonal trend, air temperature, humidity, and day of the week as confounders in a nonparametric approach. Daily death counts were associated with CO(current day), 03(6 day before), PMdcurrent day), NO₂(1 day before), SO₂(2 day before). Increase of 29.74 pg/m (interquartile range) in PM_(10)was associated with 1.4 % (95% CI = 0 % - 2.8 %) increase in the daily number of death. This effect was greater in children(1ess than 15 aged) and elderly(more than 66 aged). We concluded that Gwangju had 1 - 24 % increase in mortality in association with IQR in air pollutants. Daily variations in air pollution within the range currently occurring in Gwangju might have an adverse effect on daily mortality. These findings also support the hypothesis that air pollution, at levels below the current ambient air quality standards of Korea, is harmful to sensitive subjects, such as children or elderly.