연안 도시 대기오염 물질의 농도분포 특성

박종길,석경하,김지형,차주완 한국환경과학회 2002 한국환경과학회지 Vol.11 No.12

This paper aims to find the characteristics of concentration distribution of coastal urban air pollutants. For this purpose, It was used the daily meteorological data and hourly concentration data O_3 and NO_2 in Busan metropolitan city from 1994 to 1996. It was investigated the annual and monthly distribution of ozone and nitrogen dioxide concentration at each site in Busan, and also investigated the characteristics of concentration change of air pollutants with time under the sea breeze. As a results, the concentration of nitrogen dioxide and ozone tend to be increased every year and nitrogen dioxide concentration is higher than ozone concentration at all site in Busan. The concentration of ozone is high in summer season and low in winter season, but the concentration of nitrogen dioxide have a reversed trend. The monthly peak concentration of ozone occurred in April and September, while the monthly minimum concentration of nitrogen dioxide occurred in August. Their trend were indentified by sites near the coastline than sites stands apart from the coastline. The sea breeze occurred annual mean 81 days in Busan from 1994 to 1996. The main wind direction of sea breeze was classified into southeasterly. In case of southwesterly, It was pronounced the south wind and southwest wind. In case of southeasterly, the occurrence frequency of east wind was high. Especially, the concentration of urban air pollutants, such as ozone and nitrogen dioxide, were high on time which the sea breeze flow, and the areas that ozone concentration was high moved from outside part to central part of city with time. In costal urban such as Busan, the wind direction of sea breeze is influenced the influenced the change of ozone and nitrogen dioxide concentration on time which the sea breeze flow at each site and air pollutants concentration of sites on the pathway of sea breeze.

대기질 영향평가와 예측방법에 대한 개선방향

박종길,원경미,김성수 한국환경과학회 1994 한국환경과학회지 Vol.3 No.2

When we conduct environmental impact assessment, main contents consist of summary, project outline, environmental conditions, environmental impacts due to the project, mitigation devices, and alternative measures of harmful impact on environment. In this paper, to understand how they really conduct air quality impact assessment and prediction and examine their effectiveness, we considered the provisions and actual case of environmental impact assessment in Korea with that in Japan. As a result, we propose a method of improving air quality impact assessment and prediction, such as reflection of the result in environmental impact assessment, detailed assessment focused on relatively important environmental impact elements, field measurement investigation over four season and seven sucessive days, the uniformity of units, the proper model development to predict environmental concentration and a biennial environmental impact assessment for ex post management.

높은 지향성을 갖는 Air Line 결합기 설계

길준범,이성원,최영호,박종임,안달,박준석 호서대학교 반도체제조장비국산화연구센터 2000 학술대회 자료집 Vol.2000 No.1

본 논문에서는, 일반적인 스트립 구조의 결합기가 갖는 문제 즉, 높은 온도에서 나쁜 특성을 보이는 문제점을 극복하고자 Air Line Type의 결합기를 구현하였다. 또한 이 결합기는 24dB이상의 지향성을 가지고 있다. 해석을 위해 짝수 모드와 홀수 모드 해석법을 사용하였고, EM-Simulation으로 확인한 특성과 실제 제작된 20dB, 30dB Cellular 대역(800∼900MHz) Air Line 결합기의 결고 특성은 좋은 일치를 보여주고 있다. 또한 최대 장점인 온도 특성은 온도 데이터를 통하여 온도에 강한 특성을 보임을 알 수 있다.

Head-Space SPME에 의한 생체시료 중 메스암페타민류 분석(Ⅲ)

박미정,최상길,손행자,최화경,최영남,허상철,박종서,정희선 內務部 國立科學搜査硏究所 2002 國立 科學 搜査 硏究所 年報 Vol.34 No.-

김해지역의 산성강우와 기압유형

박종길,황용식 한국환경과학회 1999 한국환경과학회지 Vol.8 No.3

This study was carried out to investigate the characteristics of acidity in the precipitation and weather patterns that were influenced it at Kimhae area from March, 1992 to June, 1994. The range of pH value in the precipitation at Kimhae is 3.45 to 6.80 and the average is pH 4.62, and the major anion components associated with acidity in the precipitation are Cl^-, SO_4^2- , NO_3^-. These distributions are to be expected the influence of industrialization such as, urbanization and construction of industrial complex at Kimhae area and the long range transporting of air pollutants from China. The weather patterns governing the acid rain at Kimhae were classified broadly into four types(Cyclone(type I-a, type I-b), Migratory Anticyclone(type Ⅱ), Tropical Cyclone(type Ⅲ), Siberia High(type Ⅳ)) and weather pattern which had the most occurrence frequency of acid rain was type I-a and the average pH value of precipitation in this pattern was 4.45, and we are found that the source area of air mass which was accompanied with high acidic precipitation in Kimhae was the central China include with Peking through the analysis of surface weather maps, 850 hPa wind fields, and the streamline analyses.

부산지방 강수량의 변화시점에 관한 통계적 접근

박종길,석경하 한국환경과학회 1998 한국환경과학회지 Vol.7 No.1

This paper aims to estimate the change point of the precipitation in Pusan area using the several statistical approaches. The data concerning rainfall are extracted from the annual climatological report and monthly weather report issued by the Korean Meteorological Administration. The average annual precipitation at Pusan is 1471.6 ㎜, with a standard deviation of 406.0 ㎜, less than the normal(1486.0 ㎜). The trend of the annual precipitation is continuously decreasing after 1991 as a change point. And the statistical tests such as t-test and Wilcoxon rank sum test reveals that the average annual precipitation of after 1991 is less than that of before 1991 at 10% significance level. And the mean annual precipitation in Kyongnam districts is also continuously decreasing after 1991 same as Pusan.

TiO_(2)-SiO_(2) 나노 복합미립자의 합성

박진구,송영상,김종길,김호건 한양대학교 이학기술연구소 2005 이학기술연구지 Vol.8 No.-

TEOS(tetrethyl orthosilicate)로 부터 제조된 구형의 SiO_(2) 미립자를 TiOCl_(2) 수용액과 반응시켜 SiO_(2) 표면에 10~20㎚ 두께의 균일한 TiO_(2)막이 형성된 TiO_(2)-SiO_(2) 복합미립자를 합성하였다. X-선 회절 분석결과 합성초기의 복합체 TiO_(2)는 비정질 상태이지만 700℃이상의 열처리에 의하여 anatase결정상이 나타났고 900℃이상에서 rutile결정상으로 전이됨을 확인하였다. TiO_(2)-SiO_(2) composite particle in which the homogeneous TiO_(2) layer with width of 10~20㎚ was formed on the SiO_(2) surface by the reaciton of the spherical SiO_(2) particale in TiOCl_(2) solution As the resulte of XRD analysis the phase of TiO_(2) coated on SiO_(2) sphere was noncrystalline state however it was changed to anatase crystal state by heating at 700℃and th anatase phase was transfomed to reile phase at the aboce 900℃

기상요소에 의한 대기오염물의 건성침적량 추정 : 황산화물을 중심으로

박종길 인제대학교기초과학연구소 1998 자연과학 Vol.2 No.-

본 연구의 목적은 미국 플로리다 북중부 지방에 있는 G ainesville의 Austin Cary Forest에서 관측되어진 대기 오염물 (Sulfur dioxide, particulate sulfate)의 농도 특성을 밝히고자 하며 동일 지역에서 관측되어진 기상요소(1990. 7. ∼ 1991. 6)에 의한 대기 침적속도 및 플럭스를 Hicks 다층모델을 이용하여 추정하고자 한다. 연구 기간동안 추정된 연 평균 건성 침적속도는 SO₂(g)가 SO₄²-(s)0.860.07 [㎝/s]이며 SO₄²-(s)는 0.0980.014 [㎝/s]이였다. 일 평균 침적 속도의 경향은 하계에 크고 동계에 작아지는 계절적인 변화를 가지며 침적 속도의 월 평균 값은 큰 차이를 보이지 않으나, 하계에 증가하고 동계에 감소하는 경향을 보여준다. 건성 침적속도의 일변화는 일사량이 강한 한 낮에는 크며 밤에는 작아진다. 침적 Flux는 SO₂(g)가 SO₄²-(s)보다 크며 동계에 크게 나타났으나 SO₄²- 는 반대 경향을 나타내었다. The objectives of this paper are to analysis the characteristics of the concentration of air pollutant observed at the Gainesville, north central part of Florida, to estimate atmospheric deposition velocities and fluxes from the local meteological elements using the Hicks model that being compute from the concentration data and meteorological data observed at the same site. The model that was used for these calculations is the multiple layer resistance model developed by Hicks et al. [13, 14]. Meteorological data were recorded on an hourly basis from July, 1990 to June, 1991 at the Austin Cary forest site, near Gainesville FL. Or the study period at this site annual average dry deposition velocities were estimated to be: 0.860.07 [㎝/s] for SO₂(g) and 0.0980.014 [㎝/s] for SO₄²-(s). Trends observed in daily mean deposition velocities are largely seasonal, indicated by larger depositon velocities for the summer season and smaller deposition velocities for the winter season. Monthly averaged values for deposition velocities do not show large differences over the year but do show a tendency for increased deposition velocities in summer and decreased values in winter. Diurnal variations of dry deposition velocities show large deposition velocities for strong solar irradiance during day time and small depositon velocities at night.

태풍 셀마의 시간 스케일에 따른 강수분포의 특성

박종길 인제대학교 1991 仁濟論叢 Vol.7 No.1

This paper aims to describe the characteristics of the rainfall distribution in relation to time-scale of typhoon Thelma. For this study, the diurnal variation of the rainfall, relationships between the time-sacle and rainfall distribution for 12 hours and regionality of the rainfall dirstribution were investigated by using the hourly meteorological data of the 60 stations. The results were summarized as follows : 1) The heavy rainfall areas according to typhoon Thelma is revealed the southeastern part of Korean peninsula. And the life-time of heavy rainfall of 30mm/h and upward is 3 hours and the hourly maximum rainfall of Sancheong and Kangreung is respectively 49.5mm/h at 1400GMT, 56mm/h at 1600 GMT, July 15, 1987. 2) Rainfall distribution maps for 12 hours which were compiled by moving averages based on hourly precipitation were cleared the regionality of rainfall distribution and closely related with the typhoon's track. 3) In the western part of the typhoon's track, it is uniformed the intensity of rainfall, while does not in the eastern part of the one. There is a time difference between the main precipitation of the typhoon and pre-precipitation due to the convergence zone located in the southern part of Korean Peninsula.

Vitamin D_(3)가 RAW 세포에 감염된 Mycobacterium marinum의 증식억제에 미치는 기전 연구

박정규,정샛별,이길수,김수영,송창화,박종호,조현구,조은경,김화중 충남대학교 의과대학 의학연구소 2003 충남의대잡지 Vol.30 No.1

The natural resistance-associated macrophage protein 1(Nramp1) has been proposed to directly regulate bactericidal or bacteriostatic activity of the macrophage toward pathogens or participate in macrophage activation that lead to microbial elimination in the host. The relationship between Nramp1 and nitric oxide(NO) as an antimicrobial factor has not been precisely defined to date. To devise an in vitro assay for Nramp1 function, this study introduced a wild type Nramp1^(G169) cDKA transfected RAW264.7 macrophages(A8) which bear a homozygous mutant Nramp1^(D169) allele and are permissive to replication of specific intracellular parasites. RAW264.7 and A8 macrophages did not produce NO, but vitamin D_(3)-activated-Mycobacterium marinum-infected RAW264.7 and A8 macrophages pretreated with vitamin D_(3) leaded to the increase of NO production and growth inhibition of M. marinum. Inhibition of NO production by a NO inhibitor, L-NAME, abolished the above effects. The mRNA expression of iNOS in infected macrophages with costimulated vitamin D_(3) was increased. IFN-γ activated macrophages also showed the same results with vitamin D_(3) activated macrophages. These results suggest that bactericidal or bacteriostatic activity in RAW264.7 and A8 macrophages correlated with the production of NO, although NO might not be the only factor responsible for controlling M. marinum infection. The Nrampl gene is considered to be a cofactor in the controlling the replication of M. marinum infection.