• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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• pp.286-289
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• 2007

This study is to develop a cloud detection algorit1un for COMS and it is currently tested by using MODIS level 2B and MTSAT-1R satellite radiance data. Unlike many existing cloud detection schemes which use a threshold method and traditional statistical methods, in this study a feed-forward neural network method with back-propagation algorit1un is used. MODIS level 2B products are matched with feature information of five-band MTSAT 1R image data to form the training dataset. The neural network is trained over the global region for the period of January to December in 2006 with 5 km spatial resolution. The main results show that this model is capable to detect complex cloud phenomena. And when it is applied to seasonal images, it shows reliable results to reflect seasonal characteristics except for snow cover of winter. The cloud detection by the neural network method shows 90% accuracy compared to the MODIS products.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.290-291
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• 2021

플라스틱 소재 자동차 부품의 도장 공정에서 불량은 다양한 원인과 현상으로 기인하는데, 온도, 습도, 미세먼지 등 기상환경 조건의 변화에 따라 불량률이 변화하는 연관성을 분석하였다. 실제 도장업체에서 1년 동안 수집한 종류별, 원인별 불량률과 기상환경의 상관성을 머신러닝 기법에 의해 학습하고 시험하여 특정의 기상환경에서 불량률을 예측하였다. 그 결과 실먼지로 인한 불량은 98%, 흐름에 대한 불량은 90%의 불량을 예측하여 모델의 성능을 입증하였다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.189-192
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• 2005

Desertification is one of the main global environmental phenomena. It has resulted in deterioration environment and poor economy, and imposed threat to the surviving environment of the overall mankind. Therefore, creating of methods for monitoring and estimate of risk desertification are necessary. Early warning system is one of important ways for monitoring and forecasting of desertification. Remote Sensing and GIS technology are as suitable tools and methods for early warning system. In this aim, we have evaluated of applications of remote sensing and GIS in monitoring and estimating desertification process (case study in Fars Province of Iran). In this research, we have considered erosion and vegetation cover parameters as main factors affecting in desertification process. The result shows that remote sensing and GIS technology could be useful in evaluation of desertification as one method for desertification early warning. Also, Results suggested that erosion and plant cover are affecting in develop the desertification process in study area.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2004년도 학술발표회
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• pp.124-133
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• 2004

Global climate variations are expected to affect local hydro-meteorological variables like precipitation and temperature. The Southern Oscillation (SO) is one of the major driving forces that give impact on regional and local climatic variation. The relationships between SO and local climate variation are, however, characterized by strong nonlinear variation patterns. In this paper, the nonlinear dynamic relationship between the Southern Oscillation Index (SOI), precipitation, and temperature in Fukuoka, Japan, is investigated using by a nonlinear multivariable approach. This approach is based on the joint variation of these variables in the phase space. The joint phase-space variation of SOI, precipitation, and temperature is studied with the primary objective to obtain a better understanding of the dynamical evolution of local hydro-meteorological variables affected by global atmospheric-oceanic phenomena.

• 국제초고층학회논문집
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• 제1권2호
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• pp.73-80
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• 2012

In order to use sea breezes to counter the heat island phenomena, i.e. to promote urban ventilation, it is necessary to clarify the effect of building morphology and height on large-scale wind fields. In this study, the sea breeze in the vicinity of the Kanto Plain in Japan is simulated using a mesoscale meteorological model incorporating an urban canopy model, and the inland penetration of sea breezes is accurately reproduced. Additionally, a mean kinetic energy balance within a domain (Control Volume; CV) moving along the sea breeze is analysed. From the results, it is clarified that the sea breeze is interrupted by the resistance and turbulence caused by buildings at the centre of Tokyo. The interruption effect is increased in accordance with the height of these buildings. On the other hand, adverse pressure gradients interrupt in the internal region.

• 한국제4기학회지
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• 제21권2호
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• pp.74-76
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• 2007

The modern foraminiferal distribution patterns and species diversity in surrounding seas of Korea are controlled by winter monsoon and characteristics of water masses. Abrupt climate change, Younger Dryas cold episode" is identified in Korea. The Younger Dryas is characterized by local extinctions of foraminifera. Several record-breaking climate phenomena observed in Korea, especially September, 2007.

• 한국환경과학회지
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• 제11권9호
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• pp.933-943
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• 2002

The urban pollution if affected by local environmental, so it is necessary to consider area characteristics such as emission source and meteorological phenomena, in studying urban air pollution. Ulsan is laocated on south-east coast and has many industrial facilities, so many people have concerned about air pollution. This study contain conducting numerical simulation of air pollutant concentration considered land and sea breeze in Ulsan area with the numerical model.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.51-53
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• 2015

As abnormal climate phenomena occur more frequently due to climate change, damage which results from meteorological disaster increases accordingly and its scale and variety are becoming wider. This paper draws out planning and design elements and application techniques to build cities more adaptive to climate change from urban development cases in US and Europe. An urban model is suggested, that enables built environment to be more resilient to risks caused by climate change is applicable to urban development projects in practice.

• 통합자연과학논문집
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• 제6권2호
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• pp.118-123
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• 2013

Korea, which is located in the middle-latitude area of the northern hemisphere, has four seasons. These seasons can be classified based on their months, mean temperatures, biology and natural phenomena. In this study, climatic changes were identified by biotic and temperature seasons, changing trends were compared by season, and the appropriateness of the biotic phenomena for the biotic season classification was examined. The data for this study included the mean temperatures, and biology phenomenon observation dates, which had been observed for 38 years from the ASOSs in seven Gwangju and Jeonnam regions. Limitations were found in the classification of the temperature and biotic seasons. Especially in the case of the biotic season based on a single life, the points of the first sighting and the initial sound fluctuated so much that the accuracy of the results was not guaranteed. Therefore, the life species had to be selected subject to detailed verification and accurate specifications, and to be applied to the meteorological phenomena. In addition, there were lives in the standard biology that could no longer be observed because of environmental pollution and climatic change, which indicates the need to protect the existing standard biology.

• 대기
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• 제13권4호
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• pp.57-70
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• 2003

기상연구소 주요사업 "한반도 악기상 집중관측사업(KEOP)"의 일환으로 2001년 기반공사를 시작하여 2002년 초부터 오토존데, 윈드프로파일러 등 첨단관측장비의 해남기상관측소에 도입 및 설치와 2002년 11월 연구용 도플로 레이더의 (구)무안기상대에 이전 설치로 국가 악기상 집중관측센터는 안정적으로 구축되었다. 이 집중관측센터를 중심으로 기존 기상청 관측망과 연계하여 2002년에 여름철 장마, 태풍 "루사" 그리고 강설과 같은 악기상 집중관측과 국제집중관측프로그램(CAMP/CEOP)에 참여를 위한 고층 및 플럭스 관측자료의 안정적 생산 및 DB 구축 능력 평가를 위한 고층 및 플럭스 집중관측을 국내 대학들과 협력하여 성공리에 실시하였다. 이들 집중관측자료의 초기 분석결과, 국가 악기상 집중관측센터에 설치된 첨단관측장비에서 생산된 관측자료는 악기상 구조 및 발달과정 분석연구 뿐만 아니라 지표 플럭스 연구 활성화에 크게 기여할 것으로 판단되었다. 특히 태풍 "루사" 통과시 오토존데를 이용한 3시간별 고층관측을 통한 태풍 "루사" 중심 구조 분석은 매우 의미 있는 결과로 사료된다. 앞으로 2003년 1월부터 안정적으로 운영되는 윈드프로파일러 자료를 이용하여 악기상 관련 전선 및 하층바람 구조 및 발달 과정 분석을 분석하고, 아울러 연구용 X-밴드 도플러 레이더, 오토존데 관측 자료간의 비교분석으로 윈드프로파일러 관측자료의 정확도를 평가하고자 한다. 광학강우강도계, 마이크로 강수레이더, 연구용 X-밴드 도플러 레이더 그리고 기상청 진도 S-밴드 레이더를 이용하여 악기상 강수시스템의 구조 및 발달 과정 분석할 예정이다. 또한 국가 악기상 집중관측센터는 태풍과 장마, 겨울철 폭설과 한파와 같은 악기상 집중 관측외에 봄과 가을철에 많은 강수를 동반한 저기압 통과시, 황사 발생의 경우 등에 특별관측을 수행하여 특이기상 현상의 이해력을 증진시키는데 활용코자 한다.