국내 다양한 실내환경에서 라돈농도 및 거주자의 실효선량 평가

이철민,김윤신,노영만,김기연,전형진,김종철,Lee, Cheol-Min,Kim, Yoon-Shin,Roh, Young-Man,Kim, Ki-Youn,Jeon, Hyung-Jin,Kim, Jong-Cheol 한국환경보건학회 2007 한국환경보건학회지 Vol.33 No.4

The objective of this study was to offer basic and scientific data for decision-making of policy for improvement and management of radon, natural radiation gas, in Korea and to form the foundation of radon related international cooperation. Therefore, this study collected and re-analysed the articles on exposure of radon in various indoor environment in journals related environment in Korea since 1980 and estimated the annual exposure dose and effective dose by exposure of radon received by inhabitants in them. The highest pooled average radon concentration of $50.17{\pm}4.08\;Bq/m^3$ (95% CI : $42.17{\sim}58.17\;Bq/m^3$) was found in dwelling house among various indoor environment. All of pooled average radon concentration estimated in this study showed lower than the guideline concentration ($148\;Bq/m^3)$ of US EPA and the Korean Ministry of Environment. The annual effective dose received by inhabitants in various indoor environment was estimated 1.071 mSv/yr. That is equal to annual effective dose (1.0 mSv/yr) by exposure of radon estimated by UNSCEAR.

다중이용시설 내 부유세균 농도기준에 관한 소고

이철민,Lee, Cheol-Min 한국공기청정협회 2019 空氣淸淨技術 Vol.32 No.2

광릉숲에서 개벌 후 나비군집의 변화

이철민,권태성,Lee, Cheol Min,Kwon, Tae-Sung 한국응용곤충학회 2014 한국응용곤충학회지 Vol.53 No.4

본 연구는 개벌 후 나비군집의 변화를 파악하기 위해서 실시하였다. 조사는 2011년 개벌지, 임도, 산림에서 5월부터 11월까지 선조사법을 실시했다. 조사결과, 총 32종 398개체의 나비가 관찰되었다. 먹이생태지위 범위와 서식처 유형에서의 나비 개체수는 개벌지가 산림보다 유의하게 높았다. 나비의 종수와 종다양도는 개벌지가 산림에 비하여 유의하게 높았다. 개벌지에서 환경부 취약종 기생나비와 은점표범나비의 많은 개체가 확인되었다. 본 연구결과, 개벌로 인하여 형성된 초지는 산림생태계에서 나비의 다양성을 높이는 중요한 역할을 한다. This study was carried out to clarify the change of butterfly community after clear cutting. Butterfly survey was conducted in clear cutting area, forest road, and forest using line transect method from May to November in 2011. A total of 32 species and 398 individuals of butterflies were observed. Abundance of food niche breadth and habitat type was significantly higher in clear cutting area than in forest. Estimated species richness and species diversity were significantly higher in clear cutting area than in forest. In clear cutting area, Leptidea amurensis and Argynnis niobe, vulnerable species, were abundant. This result suggests that grasslands formed by clear cutting play an important role to increase butterfly diversity in forest ecosystem.

산불 후 개미군집의 단기변화

이철민,권태성,Lee, Cheol Min,Kwon, Tae-Sung 한국응용곤충학회 2013 한국응용곤충학회지 Vol.52 No.3

산불은 산림에 서식하는 곤충들을 죽이거나 분산시킴으로서 그들의 군집을 교란한다. 산불 후 개미군집은 종다양성, 종구성, 기능군 구성이 달라질 것이다. 본 연구는 1996년 강원도 고성에서 발생한 대형 산불 직후 일년동안 산불지와 비산불지의 개미군집의 변화를 비교하기 위해서 수행되었다. 총 16종 1,308개체의 개미가 채집되었고, 산불지에서 15종 696개체, 비산불지에서 13종 612개체가 채집되었다. 산불 후 다양도와 풍부도가 감소될 것이란 일반적인 예상과는 달리 산불지와 비산불지는 개미군집의 풍부도, 종다양성, 종구성, 기능군 구성에서 차이가 없었고, 종풍부도(추정치)는 산불지가 비산불지 보다 오히려 높았다. 그러나 개미의 월별 출현양상은 (풍부종과 전체) 산불지와 비산불지 간에 많이 달랐다. 산불직후인 1996년 5월에는 산불지에서 개미가 더 많았으나, 가을(1996년 9월과 10월)에는 비산불지에서 개미가 더 많았다. 이는 산불지의 환경변화(토양건조 등)로 인해 개미개체군의 변동(개체군의 사멸 또는 이동)이 원인일 것이다. 결론적으로 봄에 발생하는 산불은 토양 깊이 월동하는 개미 군체를 파괴하지 못하기 때문에 산불은 개미상에 유의한 영향을 미치지 못했다. Forest fires disturb communities of forest-dwelling insects by killing or dispersal. Species diversity, species composition, and functional guilds of ant communities will be changed following forest fires. A survey of ants was conducted to find changes in ant communities after a large fire occurred in Goseong within Gwangwon province in South Korea in 1996. In total, 1,308 ants representing 16 species were collected; 696 ants representing 15 species were collected at the burned site, and 612 ants representing 13 species were collected at the unburned site. Contrary to the general expectation which predicts a decrease of diversity and abundance after fire, abundance, species diversity, species composition, and functional guilds of ant communities did not differ between the burned site and the unburned site. Furthermore, estimated species richness was significantly higher at the burned site than at the unburned site. However, monthly occurrences of ants (abundant species and pooled) were different between the burned site and the unburned site. Ants were more abundant at the burned sites than the unburned site just after the fire (May 1996). However, they were more abundant at the unburned site than the burned site in autumn (September and October 1996). This phenomenon might be caused by environmental change (e.g., decrease of soil moisture). In conclusion, the fire did not significantly change ant fauna, as fire in spring cannot destroy ant colonies that are wintering in deep soils.

풍수재보험에 관심가져야

이철민,Lee, Cheol-Min 한국화재보험협회 1990 防災와 保險 Vol.46 No.-

확률론적 모의실험을 이용한 공기청정기의 실내공기중 PM10과 $NO_2$ 제거효율에 관한 연구

이철민,김윤신,이태형,김종철,김중호,Lee , Cheol-MIn,Kim , Yoon-Shin,Lee , Tae-Hyung,Kim , Jong-Cheol,Kim , Jung-Ho 한국환경보건학회 2004 한국환경보건학회지 Vol.30 No.3

We estimated decreasing rate of indoor air pollutants which are PM10 and $NO_2$ by the air cleaner in indoor environment. This study respectively examined concentration of PM10 and $NO_2$ two times in 34 sites located in Seoul and Kyung-gi Do from April to September in 2003. Sectional period was respectively divided for operating the air cleaner and non-operating the air cleaner. Moreover, questionnaire was executed to grasp physical characteristic of objective building and residential characteristic of residents by using method of self-entry. There was a trend that concentration of PM10 and $NO_2$ separated number of residents during operating period respectively decreased among indoor air. According to the existence of smoker in indoor, both concentration of PM10 and $NO_2$ during operating period decreased in each case, and according to existence of pets, both cases decreased concentration of pollutants by operating the air cleaner. We used Monte-Calro simulation to remove uncertainty and identify efficiency of eliminated pollutants such as PM10 and $NO_2$ by the air cleaner. Average efficiency of removal for PM10 and $NO_2$ were 61.84${\pm}$23.04% and 48.67${\pm}$18.03% respectively.

서울시 지하철 객차 내 PM과 CO₂의 농도 분포

이철민,박화미,노영만,김윤신,박동선,Lee, Choel-Min,Park, Wha-Me,Roh, Young-Man,Kim, Yoon-Shin,Park, Dong-Sun 한국환경보건학회 2008 한국환경보건학회지 Vol.34 No.1

The objective of this study is to provide the research data on the actual concentrations of $PM_{10},\;PM_{2.5},\;PM_1\;and\;CO_2$ in Seoul subway carriages. Mean concentrations of $PM_{10},\;PM_{2.5}\;and\;PM_1,\;and\;CO_2$ in subway carriages were investigated at levels of $215.1{\pm}101.4{\mu}g/m^3,\;86.9{\pm}38.6{\mu}g/m^3,\;27.0{\pm}11.4{\mu}g/m^3,\;and\;1,588{\pm}714ppm$, respectively. The mean concentrations in subway carriages were higher when the train ran on an underground track rather than on an above ground track. The measured concentration of particulate matter varied with the time of day and was highest in the morning, followed by noon and evening while the $CO_2$ concentration was highest in the morning, followed by evening and noon. In relation to correlation among the pollutants: the correlation between $PM_{10}\;and\;PM_{2.5}$ was 0.92, and that between $PM_{2.5}\;and\;PM_1$ was 0.94. The inclusion rate of $PM_{2.5}\;to\;PM_{10}$ was $41{\pm}7%$ and that of $PM_1\;to\;PM_{2.5}\;was\;32{\pm}4%$. In addition, the $CO_2$ concentration had a positive relation with the number of people in a carriage, whereas the concentration of $PM_{10}$ had negative correlation to the number of people. In relation to these two pollutants we calculated using a regression equation (34.06+0.04$CO_2$(ppm)-0.09 PM10$({\mu}g/m^3)$($R^2$=0.30, p<0.01, n=707), that a maximum number of 61 persons would ensure that each pollutant is maintained below the criteria level, applicable to subway stations.

A Newly Recorded Species of the Genus Milisipepsis (Lepidoptera, Sesiidae) from Korea

이철민,아리타 유타카,배양섭,Lee, Cheol-Min,Arita, Yutaka,Bae, Yang-Seop Korean Society of Applied Entomology 2011 한국응용곤충학회지 Vol.50 No.4

Milisipepsis속은 M. takizawai (Arita and $\check{S}$patenka, 1989)에 의해서 한국에서 처음으로 기록된다. 기재, 성충사진, 암컷 생식기와 국명을 제시한다. The genus Milisipepsis is reported for the first time in Korea with M. takizawai (Arita and $\check{S}$patenka, 1989). Description, image of the adult, female genitalia, and Korean common name of the species are provided in this paper.

위에 발생한 신경내분비 종양의 임상병리학적 고찰

이철민,신연명,Lee, Chul-Min,Shin, Yeon-Myung 대한위암학회 2008 대한위암학회지 Vol.8 No.4

목적: 위에 발생하는 신경내분비 종양은 국내에서도 그 보고가 드문 매우 독특한 조직형인데, 이 종양의 임상병리학적 특징들에 대해 알아보고자 하였다. 대상 및 방법: 1999년 1월부터 2007년 8월까지 고신대학교 의과대학 외과학교실에서 위암으로 수술받은 4,159예 중 신경내분비 종양으로 진단받은 13예를 대상으로 의무기록 및 조직 표본을 후향적으로 분석하였다. 결과: 위 신경내분비 종양은 남자 11예, 여자 2예였고, 평균나이는 54.9세(42~72)였으며, 주증상은 상복부 통증과 속쓰림이 많았다. 점막 또는 점막하 종양 2예를 제외하고 나머지 9예는 모두 근육층 이상을 침범한 진행성이었고, 종양의 평균 크기는 7.0 cm (0.7~15)였다. WHO 분류법에 의한 내분비 종양의 유형은 제 3형이 8예, 제 4형이 4예, 제 1형이 1예였다. 림프절 전이는 11예에서 있었고, 추적 기간내 재발한 4명의 환자 모두 제 3형과 제 4형이었고, 재발한 장기는 간이 2예, 다장기(복막, 폐) 1예, 다장기(간, 췌장, 십이지장) 1예였고, 생존 기간은 평균 12.8개월이었다. 결론: 위에 발생하는 신경내분비 종양은 진단 당시 진행된 경우가 많았고 간 전이를 잘 하였으며 예후가 나쁜 독특한 조직형이다. Purpose: The goal of this study was to review the clinicopathologic characteristics of neuroendocrine tumor (NET) of the stomach. Materials and Methods: We retrospectively reviewed the medical records of 13 patients who were diagnosed with neuroendocrine tumor from January 1999 to August 2007 at Kosin Medical Center; 4,159 gastric cancer patients were treated surgically during the same time. The average follow up period was 14.3 months. Results: The majority of 13 patients were men (male-female ratio: 11:2) and the average age of patients with NET was 59.4 years (range: 42~72 years). The presenting symptoms were mostly epigastric pain and soreness. The tumor was limited to the mucosa or submucosa in two cases, and the tumor extended beyond the muscle layer in 11 cases. The mean size of the tumor was 7.0 cm, ranging from 0.7 cm to 15 cm. The type of the NEC (according to the WHO classification) was type 3 for eight patients, type 4 for four patients and type 1 for one patient. Regional lymph node metastasis was noted in 11 patients. Four cases showed recurrence of disease and the site of recurrence included liver in two patients, multiple organs (including the peritoneum and lung) in one patient and multiple organs (including liver, pancreas and duodenum) in one patient. The recurrent cases were type 3 and type 4 and the average survival period of the recurrent patients was 12.8 months. Conclusion: The majority of neuroendocrine tumors of the stomach were at an advanced stage at the time of diagnosis. These tumors frequently recurred in the liver and they have a poor prognosis.

손해사정업무의 구조적 변경

이철민,Lee, Cheol-Min 한국화재보험협회 1978 防災와 保險 Vol.9 No.-