• 한국디지털건축인테리어학회논문집
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• 제13권3호
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• pp.5-14
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• 2013

In recent years, the change of urban function and the decrease in birth rate have given rise to merge, abolition and relocation of the existing schools. This study explores the possibilities for various land utilizations of disused school sites, aims to propose the effective asset management and the proper development methodology. Firstly it examines the status of small class school in urban area and the linkage complex development method. Among various methods, it compares the validity between the closed school management and public asset management method. In addition, it analyses the national finance method and public-private partnership investment as a proper development methodology to ensure both the common-benefit and profitable business. As a result of study, it prposes the BTO(build-transfer-operate) method to use effectively the disused school sites in urban area.

• 한국멀티미디어학회논문지
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• 제10권12호
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• pp.1559-1565
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• 2007

The many target-detection methods that use forward-looking infrared (FUR) images can deal with large targets measuring $70{\times}40$ pixels, utilizing their shape features. However, detection small targets is difficult because they are more obscure and there are many target-like objects. Therefore, few studies have examined how to detect small targets consisting of fewer than $30{\times}10$ pixels. This paper presents a small target detection method using clutter rejection with stochastic hypothesis testing for FLIR imagery. The proposed algorithm consists of two stages; detection and clutter rejection. In the detection stage, the mean of the input FLIR image is first removed and then the image is segmented using Otsu's method. A closing operation is also applied during the detection stage in order to merge any single targets detected separately. Then, the residual of the clutters is eliminated using statistical hypothesis testing based on the t-test. Several FLIR images are used to prove the performance of the proposed algorithm. The experimental results show that the proposed algorithm accurately detects small targets (Jess than $30{\times}10$ pixels) with a low false alarm rate compared to the center-surround difference method using the receiver operating characteristics (ROC) curve.

• 한국정보과학회논문지:소프트웨어및응용
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• 제28권1호
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• pp.14-25
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• 2001

XML은 다양하게 응용할 수가 있어 여러 분야에서 널리 사용되고 있다. 그러나 이러한 응용들에 대해서 통합적으로 관리해 주는 시스템은 제안된 바 없어, 각각의 응용에 대해 별개의 언어로 사용되고 있다. 따라서, 본 논문은 XML의 다양한 응용 중에 웹을 기반으로 하는 대표적인 응용인 SMIL, RDF, WIDL에 대해, 이들의 DTD와 문서 인스턴스를 통합하여 객체 모델링을 하고자 한다. 각 XML 응용에 대해 객체 모델링 규칙과 알고리즘을 통합할 수 있는 시스템을 제안한다. 이를 통해 XML 종류에 상관없이 웹 기반 XML 응용의 구조를 쉽게 파악할 수 있으므로 문서 생성을 용이하게 하며, 객체지향 스키마를 쉽게 생성할 수 있으므로 객체지향 데이터베이스 문서관리의 기반이 될 것이다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.126-129
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• 2006

The marine environment is under considerable threat from intentional or accidental oil spills, ballast water discharged, dredging and infilling for coastal development, and uncontrolled sewage and industrial wastewater discharges. Monitoring spills and illegal oil discharges is an important component in ensuring compliance with marine protection legislation and general protection of the coastal environments. For the monitoring task an image processing system is needed that can efficiently perform the detection and the tracking of oil spills and in this direction a significant amount of research work has taken place mainly with the use of radar (SAR) remote sensing data. In this paper the level set image segmentation technique was tested for the detection of oil spills. Level set allow the evolving curve to change topology (break and merge) and therefore boundaries of particularly intricate shapes can be extracted. Experimental results demonstrated that the level set segmentation can be used for the efficient detection and monitoring of oil spills, since the method coped with abrupt shape’s deformations and splits.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2003년도 춘계학술발표회 논문집
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• pp.171-180
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• 2003

The merging of different scales or multi-sensor image data is becoming a widely used procedure of the complementary nature of various data sets. Ideally, the merging method should not distort the characteristics of the high-spatial and high-spectral resolution data used. To present an effective merging method for survey of reclaimed land, this paper compares the results of Intensity Hue Saturation (IHS), Principal Component Analysis (PCA), Color Normalized(CN) and High Pass Filter(HPF) methods used to merge the information contents of the high-resolution (6.6 m) Electro-Optical Camera (EOC) panchromatic image of the first Korea Multi-Purpose Satellite 1 (KOMPSAT-1) and the multi-spectral Moderate Resolution Imaging Spectroradiometer (MODIS) image data. The comparison is made by visual evaluation of three-color combination images of IHS, PCA, CN and HPF results based on spatial and spectral characteristics. The use of a contrasted EOC panchromatic image as a substitute for intensity in merged images with MODIS bands 1, 2 and 3 was found to be particularly effective in this study.

• 방송공학회논문지
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• 제13권5호
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• pp.596-601
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• 2008

본 논문은 저해상도의 깊이 카메라와 고해상도의 양안식 카메라를 결합한 복합형 카메라 시스템에서 관심영역(region of interest, ROI)이 향상된 깊이맵을 생성하는 새로운 방법을 제안한다. 제안하는 방법은 깊이 카메라로 획득한 깊이 정보를 3차원 워핑(warping)하여 좌영상의 ROI 깊이맵을 생성한다. 그런 다음, 양안식 카메라로 획득한 좌우영상의 배경 영역을 스테레오 정합하여 좌영상의 배경 깊이맵을 생성한다. 최종적으로, ROI 깊이맵과 배경 깊이맵을 결합하여 최종 깊이맵을 생성한다. 제안하는 방법으로 생성한 고해상도 깊이맵은 기존의 스테레오 정합 방법보다 ROI에 정확한 깊이 정보를 제공한다.

• 한국농공학회지
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• 제43권1호
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• pp.75-86
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• 2001

North Korea reported that tideland reclamation projects had been successfully constructed and/or under construction during the period of the third development scheme(1987∼1993), which were 28,400ha in 9 project areas: 8 projects along the western coast and one in the eastern coast. In this study eight projects located in western coast were investigated in order to confirm the detail of works, construction stages and difference from our project formulation methods using the topographic maps published in different years and the recent sattelite image data especially Lansat TM and SPOT PN. Intensity-hue-saturation (IHS) method was adopted to merge two sattelite data for the image enhancement of remote sensing. Construction stages of sea-dikes, land consolidation for paddy and salt pan, reservoir for irrigation and desalinization and the present land use were investigated and estimated the acreage of the development areas. The total gross project areas of 38,105 ha: 16,555 ha completed for paddy or salt pan, 16,826 ha under construction, and 4,724 ha under planning were confirmed, although the area of 27,100 ha in 8 projects were reported to be completed or ongoing on the bimonthly journal of N. Korean Trend published in 1994.

• 한국컴퓨터정보학회논문지
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• 제20권11호
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• pp.69-75
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• 2015

This paper suggests heuristic polynomial time algorithm for crew scheduling problem that is a kind of optimization problems. This problem has been solved by linear programming, set cover problem, set partition problem, column generation, etc. But the optimal solution has not been obtained by these methods. This paper sorts transit costs $c_{ij}$ to ascending order, and the task i and j crew paths are merged in case of the sum of operation time ${\Sigma}o$ is less than day working time T. As a result, we can be obtain the minimum number of crews $_{min}K$ and minimum transit cost $z=_{min}c_{ij}$. For the transit cost of specific number of crews $K(K>_{min}K)$, we delete the maximum $c_{ij}$ as much as the number of $K-_{min}K$, and to partition a crew path. For the 5 benchmark data, this algorithm can be gets less transit cost than state-of-the-art algorithms, and gets the minimum number of crews.

• Environmental Engineering Research
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• 제24권3호
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• pp.382-388
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• 2019

Although nanobubbles attract significant attention, their characteristics and applications have not been thoroughly defined. There are diverse opinions about the definition of nanobubbles and controversy regarding methods that verify their characteristics. This study defines nanobubbles as having a size less than $1{\mu}m$. The generation of these sub-micron (nano) bubbles may be verified by induced coalescence or light scattering. The size of a sub-micron (nano) bubbles may be measured by optical, and confocal laser scanning microscopy. Also, the size may be estimated by the relationship of bubble size with the dissolved oxygen concentration. However, further research is required to accurately define the average bubble size. The zeta potential of sub-micron (nano) bubbles decreases as pH increases, and this trend is consistent for micron bubbles. When the bubble size is reduced to about 700-900 nm, they become stationary in water and lose buoyancy. This characteristic means that measuring the concentration of sub-micron (nano) bubbles by volume may be possible by irradiating them with ultrasonic waves, causing them to merge into micron bubbles. As mass transfer is a function of surface area and rising velocity, this strongly indicates that the application of sub-micron (nano) bubbles may significantly increase mass transfer rates in advanced oxidation and aeration processes.

• 한국재난관리표준학회지
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• 제4권2호
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• pp.57-64
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• 2011

최근 우리나라에서 발생한 홍수와 가뭄 등 물 관련 재해가 분명히 과거와는 다른 패턴을 보이는 원인이 인간의 경제활동과정에서 발생하는 엄청난 양의 이산화탄소 때문인지 아니면 태양의 흑점수의 증가 때문인지는 불확실하지만 최근 수자원 관리에 직접적인 영향을 주는 기상이변들의 발생이 증가한 것은 분명한 사실이다. 빈번히 발생하는 기상이변에 의해 각종 재해의 발생빈도가 높아지고 있는 실정이며, 상당한 원인은 기후변화로 보여진다. 이렇듯 기후변화는 반드시 사회적인 비용을 초래하게 된다. 특히 홍수와 가뭄으로 나타나는 수자원분야의 영향이 많은 부분을 차지하고 있다. 따라서 본 연구는 이러한 기후변화에 의해 발생하는 수자원분야 경제적 파급효과 분석을 통한 cost damage를 도출하고 이를 바탕으로 적절한 적응사업 추진을 위한 새로운 경제성 분석기법 정립을 위한 기초연구이다. 기 연구에서 사용된 기후변화 피해 및 감축비용 분석을 위한 모형은 PAGE, DICE, AIM, IMAGE, MERGE 등 다양했으며, 본 연구에서는 각 모델들의 개략적 특성에 대해 정리하였다. 또한 본 연구에서는 우선 비용적 측면에서 접근이 가능할 수 있도록 기후변화의 물분야에 대한 정의가 이루어졌다. 본 연구결과를 통해 기후변화의 사회경제적 영향평가 연구에서 고려할 수 있는 다양한 평가모델들의 선택에 도움을 줄 것이며 이는 최종적으로 기후변화관련 사업의 시공간적 국가 예산투자 우선순위선정에 활용될 수 있을 것이다.