Skyradiometer를 이용한 공주지역의 에어러솔의 광학적 특성

곽종흠,서명석,이태희,곽서연 公州大學校 基礎科學硏究所 2004 自然科學硏究 Vol.11 No.-

본 연구에서는 공주대학교 자연대 옥상에 설치된 분광복사측정기의 일종인 Skyradiometer로 측정된 직달 및 산란 일사량을 이용하여 간접적으로 공주지역의 에어러솔의 광학적 특성을 분석하였다. 분석기간은 2004년 1월부터 11월까지이며 에어러솔의 광학적 특성의 분석에 활용된 알고리즘은 Nakajima et al.(1996)이 개발한 Skyrad.pack.3이다. 주요 분석요소는 에어러솔의 광학두께(AOT), 단일 산란비율(SSA), 옹그스토롬 지수(α) 및 에어러솔의 크기별 분포이며 분석결과의 질을 높이기 위하여 초기 관측 자료의 품질검사를 수행하였다. 공주지역의 11개월 평균 AOT, α 및 SSA는 각가 0.6, 1.1, 그리고 0.9이며 계절 및 기상현상에 따라 큰 시간변동을 보이고 있다. 크기별 입자분포에서는 미세입자와 조대입자에서 최대치가 나타나는 바이 모달 형태를 보이고 있으며 황사(Asian dust) 기간인 봄철에는 조대입자의 총 부피가 크게 증가하였다. 이러한 현상은 봄철동안에 AOT와 SSA가 각각 크게 증가하고 감소하는 점에서도 확인되고 있다. 또한 공주지역의 에어러솔은 풍향에 큰 영향을 받지 않는 것으로 나타나고 있다. We investigate the optical properties of aerosols over Gongju by indirect method using the ground measurement, Skyradiometer. The analysis period is from January to November, 2004. Skyrad.pack.3 is used to estimate the optical properties, such as the aerosol optical thickness(AOT), single scattering albedo(SSA), Angstrom exponent(α) and size distribution, of aerosols from the ground measured radiance data. And quality control process is applied to the raw data to improve the quality of analysis results. The 11-month average of AOT, α and SSA are 0.6, 1.1, and 0.9 respectively. The averaged volume spectra of aerosols show a bi-modal distribution, first peak at fine mode and second peak at coarse mode. Asian dust events clearly increase the AOT and coarse particle, however it decrease the SSA. The effect of wind direction on the optical properties of aerosols over Gonju is not manifest.

청정지역과 도시지역의 오존농도 특성 연구

장광미,강창희,서명석,허철구,박경윤,이호근,김영준 濟州大學校 基礎科學硏究所 1996 基礎科學硏究 Vol.9 No.2

A study has been performed on the characteristics of rural and urban surface ozone concentration for the period of March 1992 to February 1993. The monitoring station of rural ozone is located at Kosan, Cheju and other urban monitoring stations are located at Seoul, Pusan and Kwangju. Rural's and urban's ozone data exhibit a distinct features in many ways. First, annual mean of rural ozone concentration is very high(42 ppbv) but urban's are very low(10~15 ppbv). Second, rural ozone data shows a seasonal variation with it's maximum in spring, and minimum in summer, but urban's show a seasonal variation with it's maximum in spring, and minimum in winter. Third, diurnal variation of rural data is very small but that of urban's are very large. Fourth, monthly mean of daily minimum of rural data is not low and shows a large seasonal variation, but those of urban's data are extremely low(<3 ppbv) and have no seasonal variations.

중위도 겨울철에서 구름의 고도와 중첩이 대기가열 및 냉각율에 미치는 영향

김맹기,곽종흠,서명석 공주대학교 기초과학연구소 2000 自然科學硏究 Vol.9 No.-

이 연구에서는 장파 (Chou et al., 1994) 및 단파(Chou, 1992)복사 모델을 이용하여 중위도 겨울철 조건하에서 구름의 고도, 구름의 중첩이 대기 가열 및 냉각율에 미치는 영향을 조사하였다. 모델의 입력자료로 사용한 중위도 평균적인 기온, 비습, 오존의 구조는 McClatchey et al.(1972)로부터 얻었다. Based on the longwave and shortwave radiation model, the effects of cloud height and overlapping on the atmospheric heating and cooling rate was studied in midlatitude winter condition. The vertical profiles of air temperature, specific humidity, and ozones was obtained from McClatchey et al.(1972).

특징형상개념을 이용한 CNC선반용 CAD/CAM시스템 개발

조진문,김석일,서명원 한국항공대학교 1995 論文集 Vol.33 No.-

Most of CAD/CAM systems for CNC lathe have been developed as the form of automatic programming systems which can generate autormatically or interactively the NC code from the process sheets and design drawings of products. But these systems have some problems during the modeling process of product shap since the shape is not described by the features intimate with system users such as chamfering, rounding, groove, arc and so on. Therfore, in this paer, the feature based CAD/CAM system for CNC lathe which is able to represent the truned product shapes by the typical features, is developed. Especially the system has the various capabilities such as the automatic determination of cutting domains, the automatic generation of CL data and NCcode, the real time cutting simulation for verification of NC code, the DNC operation and so on.

Angiolymphoid hyperplasia with eosinophilia associated with arteriovenous malformation

Seong Min Kang,Woo Jin Lee,Myoung Shin Kim,Chong Hyun Won,Sung Eun Chang,Ho Seok Suh1,Mi Woo Lee,Jee Ho Choi,Kee Chan Moon 대한피부과학회 2009 대한피부과학회 학술발표대회집 Vol.61 No.1

제주도 고산에서 수용성 에어로졸의 화학적 성분 분석

장광미,이호근,강창희,허철구,박경윤,서명석 濟州大學校 基礎科學硏究所 1996 基礎科學硏究 Vol.9 No.2

Atmospheric aerosols were collected by a High Volume Tape Sampler from March 1992 to December 1993 at Kosan, Cheju, korea. The water soluble ion concentrations in aerosol were analyzed. The concentrations of cations(Na+, K+, Ca²+, Mg²+, NH₄+) were determined by an Inductively Coupled Plazma(ICP) or an Atomic Absorption Spectrometer(AAS), and those of anions(Cl-, NO₃-, SO₄²-) were analayzed by the capillary electrophoresis method. The Ca²+, SO₄²-and NO₃- concentrations in spring were higher than those in other seasons. The lowest concentrations of these elements were found in summer, largely due to scavenging by frequent rains. Especially the ca²+ concentration on April was three to four times higher than the annual mean concentration. The enrichment factor(E.F.) of each element was calculated. The annual mean E.F. values of the Ca²+, Mg²+ and Cl- in 1992 were the same as those in 1993 except K+ and SO₄²-. The correlation formula between all cations and anions for the whole period was Anions=0.759xCations+0.066.

경연 대회를 통한 초ㆍ중고생의 창의력 신장 효과에 관한 연구

이희복,육근철,류해일,김현섭,김희수,박달원,유병환,김선효,김여상,서광수,변두원,서명석,배성효,박종석,심규철,이성희 공주대학교 과학교육연구소 2001 과학교육연구 Vol.32 No.1

미래 사회를 대비하기 위한 개인의 개성을 존중과 창의적인 능력을 지닌 인간을 양성을 목적으로 충청남도 지역의 초 ㆍ 중고등학생들을 대상으로 한 창의력 경연대회가 공주대학교 과학교육연구소에서 개최되었다. 충청남도 초 ㆍ중 ㆍ 고등학생들을 대상으로 실시한 창의력 경연대회는 창조적 아이디어를 내어 스스로 문제를 해결해 나갈 수 있는 교육 프로그램을 제공하는 좋은 기회였음이 확인되었으나, 일부의 팀에서만 참신하고 재미있는 아이디어들이 제안되었다. 여학생의 참가자 수가 상당히 증가하였으며, 대체적으로 입상권의 학생들의 상당 부분이 여학생이라는 것이 특이할만하다. 학년이 올라감에 따라서 창의적인 아이디어를 내는 양이나 질에 있어서 뒤떨어지는 것으로 분석되었으며, 토론 학습의 적응력이 미흡하고 발표력 및 청취력에 있어서도 떨어지는 것으로 나타났다. 따라서 중 ㆍ고등학교의 학교교육에서도 학생들에게 프로젝트형 탐구학습 프로그램의 적용은 물론 토론식 수습을 통한 학생들의 사고의 전환의 기회를 제공해야 할 것으로 사료된다. The creativity competition was held to foster the creativity of elementary and secondary school students in the Institute of Science Education, Kongju national University. It was found that the creativity competition effected on the improvement of inventing creative ideas and problem solving activities. But, only some competitors participated in semifinal and final contests, presented original and interesting ideas. More female students participated in competition than last year. More female participants were awarded a prize than males. Totally, participants were defective in discussion and communication, and presentation and listening ideas. Increasing grades correlated inversely with creativity and originality. There is need of inquiry project teaming programs and presenting opportunities of conversion of thinking by discussing instructions in school

Projections of High-resolution Climate Changes over South Korea using Five RCMs Based on the Four RCP Scenarios

Myoung-Seok Suh,Seok-Geun Oh,Joong-Bae Ahn,Dong-Hyun Cha,Dong-Kyou Lee,Seung-Ki Min,Seong-Chan Park,Hyun-Suk Kang 한국기상학회 2015 한국기상학회 학술대회 논문집 Vol.2015 No.10

Land Cover Classification over Korean Peninsular Using Phenological Data Derived from NOAA/AVHRR

Suh, Myoung Seok,Jang, Kwang Mi,Kim, Dong Keun 대한원격탐사학회 1997 International Symposium on Remote Sensing Vol.13 No.1

Most previous applications of NOAA/AVHRR(Advanced Very High Resolution Radiometer) for the land cover classification were based on phenological data derived from multi-temporal NDVI(Normalized Difference Vegetation Index) data. Recent research results have showed that the combination of visible and infrared channel measurements can improve the land cover classification results. Phenological differences among land cover types, reflected in temporal variations in the NDVI and LST(Land Surface Temperature) derived from NOAA/AVHRR data have been used to classify the land cover types over the Korean Peninsula. The 10-day composited NDVI dataset were produced using 1) modified MVC(Maximum Value Composition after cloud filtering) technique and 2) highest temperature composite(HTC) technique. The cloud contaminated pixel's value on the 10-day composited data set were reproduced using temporal interpolation. The phenological variables derived from the 10-day composited NDVI and daily LST were 1) maximum NDVI, 2) amplitude of NDVI, 3) mean NDVI, 4) greenness period, 5) maximum LST, 6) amplitude of LST, and 7) mean LST. A neural-network clustering using Kohonen's SOFM(Self-Organizing Feature Map) were applied to the 7 phenological data with a 4 type combination. The clustering results were compared among the various combination of phenological data.

Impacts of the High Resolution Land Cover Data on the 1989 East-Asian Summer Monsoon Circulation in a Regional Climate Model

Myoung-Seok Suh(서명석),Dong-Kyou Lee(이동규) 한국기상학회 2005 대기 Vol.15 No.2