• 한국환경과학회지
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• 제15권8호
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• pp.775-784
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• 2006

In this study, CN value was estimated by using detailed soil map and land cover characteristic against upper basin of Kumho watermark located on the upper basin of Kumho river and the hydrologic morphological characteristic factors were extracted from the basin by using the DEM document. Also the runoff analysis was conducted by the WMS model in order to study how the assumed CN value affects the runoff characteristic. First of all, as a result of studying the soil type in this study area, mostly D type soil was Identified by the application of the 1987 classification criteria. However, by that in 1995, B type soil and C type soil were distributed more widely in that area. When CN value was classified by the 1995 classification criteria, it was estimated lower than in 1987, as a result of comparing the estimated CNs by those standars. Also it was assumed that CN value was underestimated when the plan for Geum-ho river maintenance was drawn up. As a result of the analysis of runoff characteristic, the pattern of generation of the classification criteria of soil groups appeared to be similar, but in the case of the application of the classification criteria in 1995, the peak rate of runoff was found to be smaller on the whole than in the case of the application of the classification criteria in 1987. Also when the statistical data such as the prediction errors, the mean squared errors, the coefficient of determination and other data emerging from the analysis, was looked over in total, it seemed appropriate to apply the 1995 classification criteria when hydrological soil classification group was applied. As the result of this study, however, the difference of the result of the statistical dat was somewhat small. In future study, it is necessary to follow up evidence about soil application On many more watersheds and in heavy rain.

• 한국환경생태학회:학술대회논문집
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• 한국환경생태학회 2009년 학술대회 논문집
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• pp.138-141
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• 2009

• 한국환경과학회지
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• 제1권2호
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• pp.49-57
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• 1992

First, We classified man-made lakes in Korea as 4-type lakes, that is, there were River-run lakes, Dendritic lakes, Reservoir-lakes, River-mouth lakes, We studied on the environmental factors of 3-type lakes except River-mouth lakes, compared these lakes with natural lakes in foreign country. Environmental factors were watershed area, lake storage, mean depth, hydraulic retention time. As a results, 3-type lakes in Korea had remarkable differences one another according to above-mentioned environmental factors. First, We recognized that River-run lakes had higher nutrient loading according to having wider watershed area than natural lakes, and had lower algal growth rate according to shorter hydraulic retention time than natural lakes. Dendritic lake had higher nutrient loading than natural lakes, longer retention time than River-run lake. Reservoir-lakes had environmental factors between Dentritic lakes and River-run lakes. Therefore, If this studies had no quantitative results about various factors, We recognized that man-made lakes in korea had different environmental factors as compared with natural lakes, and had clear classification among 3-type lakes.

• Spatial Information Research
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• 제23권2호
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• pp.31-38
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• 2015

연안 해저 피복 조사에 있어 원격탐사 자료를 이용함으로써 조사의 효율성을 높일 수 있다. 위성영상과 항공영상과 같은 광학 원격탐사자료는 수심의 영향으로 동일한 해저 피복조건에 대해 다른 반사도를 보인다. 이 연구에서는 CASI-1500 항공 초분광영상에 대한 수심보정을 통해 연안 해저 피복에 대한 조사 범위 및 정확도 향상이 가능한지 분석하였다. 연구지역은 강원도 강릉시 연안으로 갯녹음 현상으로 인해 해저 환경이 급격히 변화되고 있는 지역이다. 해저면이 모래인 지점을 대상으로 초분광영상에서 추출한 수체 반사율(water reflectance, $R_W$)과 수심 간의 회귀모델을 통해 밴드별 수심보정 계수를 추정하고, 이를 영상 전체에 적용하였다. 그 결과 수심보정 전 영상에서 수심 6-7m에 한정하여 판독이 가능하였지만 수심보정 후 수심 15m까지 판독이 가능해지고, 수심에 따른 반사율의 변이가 크게 감소하였다. 또한 수심보정을 통해 해저 재질 분류 정확도가 13%p 증가하였다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2008년도 International Symposium on Remote Sensing
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• pp.358-360
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• 2008

Recently there are many pilot studies for advanced application of first Korea national high resolution satellite image, which is called as KOMPSAT-MSC (Korean Multi-purpose Satellite-Multi-Spectral Camera), in Korea. In this study the forest type classification methodology is developed and its distribution map was constructed by applying high resolution satellite image, KOMPSAT-MSC, based on Tasseled Cap Transformation, especially through comparing the result of detailed filed surveying such as forest type, tree species, tree diameter, tree age and tree crown density in pilot study area.

• International Journal of Contents
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• 제13권2호
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• pp.66-74
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• 2017

Patent classification is becoming more critical as patent filings have been increasing over the years. Despite comprehensive studies in the area, there remain several issues in classifying patents on IPC hierarchical levels. Not only structural complexity but also shortage of patents in the lower level of the hierarchy causes the decline in classification performance. Therefore, we propose a new method of classification based on different criteria that are categories defined by the domain's experts mentioned in trend analysis reports, i.e. Patent Landscape Report (PLR). Several experiments were conducted with the purpose of identifying type of features and weighting methods that lead to the best classification performance using Support Vector Machine (SVM). Two types of features (noun and noun phrases) and five different weighting schemes (TF-idf, TF-rf, TF-icf, TF-icf-based, and TF-idcef-based) were experimented on.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2008년도 춘계학술발표대회 논문집
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• pp.245-250
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• 2008

The city means not only a geographical area as a role of the spatial boundary, but also a socio-economic place to communicate with each part. It requires various functions to get the income and activities. But city has a limitation of a available land to provide the required function and a sufficient space to supply the activity. Therefore, the development trend of city has not been to spread to the horizontal area any more and considered the vertical area. In addition, various functions put into a massive building because many people want to solve the daily requirements without spending time and cost. In this paper, it aimed at classifying the mixed-use building into function, circulation, relation between the public and private space and the building shape to provide the design information according to the development constraints such as land area, functional limitation, accessibility, etc. The classification of the mixed-use buildings is divided into four areas. The data are collected with foreign countries in Japan, Europe and US.

• 대한안전경영과학회지
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• 제19권3호
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• pp.1-9
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• 2017

In the industrial field, various type of fuel have been used for product processing facilities. Recent for 10 years, the usage of natural gas (NG) was gradually increased. Because it has many merits; clean fuel, no transportation, storage facility and so on. There are common safety concept that strict explosion protection approaches are needed for facilities where explosive materials such as flammable liquid, vapor and gases exist. But some has an optimistic point of view that the lighter than air gases such as NG disperse rapidly, hence do not form explosion environment upon release into the atmosphere, many parts has a conventional safety point of view that those gases are also inflammable gases, hence can form explosion environment although the extent is limited and present. In this paper, the heating equipments (Hot Oil Heater) was reviewed and some risk management measures were proposed. These measures include hazardous area classification and explosion-proof provisions of electric apparatus, an early gas leak detection and isolation, ventilation system reliability, emergency response plan and training and so on. This study calculates Hazardous Area Classification using the hypothetical volume in the KS C IEC code.

• 한국지하수토양환경학회지:지하수토양환경
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• 제28권5호
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• pp.25-35
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• 2023

This study aimed to classify spring types based on the hydrogeological characteristics of springs in Yongsu-ri~Hamo-ri coastal area in western part of Jeju Island. The springs in study area can be broadly categorized into three groups: perched groundwatrer springs (soil type), perched groundwater springs (sediment type), and basal groundwater springs. The perched groundwater springs of soil type correspond to springs where groundwater seeps out from the perched aquifer formed in the soil layer due to the development of clayey Kosan Formation beneath the surface. Because of the low hydraulic conductivity of soil layer, the average of spring discharge is less than 1 m³/day. The quality of spring water is significantly influenced by agricultural activities, resulting in high nitrate nitrogen concentrations and electrical conductivity. While the perched groundwater springs (sediment type) of the Suwolbong Tuff, which are located in the upper part of Kosan Formation, exhibited relatively higher discharge rates, their water quality was similar to soil-type springs. Basal groundwater springs are located in the zone of basal groundwater, mostly near the coastline. This type of spring appears to discharge of up to 3,707 m³, and the salinity content varies with the tidal fluctuations, especially increasing significantly during dry seasons.

• 한국환경생태학회지
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• 제29권3호
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• pp.454-461
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• 2015

본 연구에서는 시가화지역의 서로 다른 토지이용을 대상으로 식물군집에 기초한 비오톱 유형분류를 실시하고 비오톱 지도를 작성하였다. 군집분류법에 의한 비오톱 유형화는 생물군집의 서식지인 비오톱의 특성을 잘 반영한다고 할 수 있었다. 연구대상지의 비오톱유형 분류 지표는 이용강도, 토지이용형태, 토지피복유형과 같은 인간행태적 요인으로 나타났다. 유형분류는 4단계 위계로 상위의 Biotope Class를 시작으로 Biotope Group, Biotope Type, Biotope Sub-Type으로 위계를 두어 구분하였다. Biotope Class는 인간간섭여부에 따른 가장 상위 분류로 인간간섭지역과 미간섭지역으로 구분되었다. 인간의 간섭지역은 투수여부에 따라 Biotope Group으로 분류되었고 틈새투수지역은 넓은 틈새와 좁은 틈새의 Biotope Type으로, 투수식생지역은 평지식생지와 사면식생지의 Biotope Type으로 분류되었다. 각 비오톱 유형의 식별종은 감태나무(Lindera glauca), 망초(Conyza canadensis), 주름잎(Mazus pumilus), 얼치기완두(Vicia tetrasperma), 뽀리뱅이(Crepidiastrum sonchifolium), 잔디(Zoysia japonica), 개소시랑개비(Potentilla supina), 큰김의털(Festuca arundinacea)이었다. 본 연구의 검증결과는 기존의 토지이용 현황에 기반하며 연구자의 주관적인 측면이 개입되는 비오톱 유형분류 기준에 대해서 식물사회학적 접근을 통한 유형 분류의 방법론이 유용함을 제시하고 있다. 또한 향후 제작될 수 있는 다양한 형태의 자연환경 지도 유형분류에 있어 보다 객관적이고 과학적인 방법의 적용가능성을 제시한 것에 의의를 갖는다.