• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.06a
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• pp.202-205
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• 2008

건물이 밀집된 도심지역을 촬영한 두 시기 항공영상에 화소기반 변화탐지 기법인 영상대차(Image Differencing), 영상중첩 분석(Image Overlay)기법을 적용하여 넓은 대도심지역의 효율적인 변화탐지 가능성을 살펴보았다. 영상대차(Image Differencing) 기법은 알고리즘이 간단하고 정량적인 분석이 가능한 결과를 얻을 수 있다는 장점이 있으나 고층건물밀집지역을 보여주고 있는 고해상도 항공영상의 적용과정에서는 폐색영역, 그림자 등으로 인해 정확한 변화탐지 결과를 보여주지 못했다. 영상중첩 분석(Image Overlay)기법은 한 번에 두 개 또는 세 개의 영상을 비교 분석할 수 있다는 장점이 있으나 직관적인 분석만을 제공하고 정량적인 분석이 불가능하였다. 현재의 화소기반 영상변화탐지 기술수준으로는 고해상도 공간영상에 대한 신뢰도 높은 변화탐지 분석결과를 얻을 수 없다는 것을 확인하였다.

• Proceedings of the Korea Water Resources Association Conference
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• 2019.05a
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• pp.65-65
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• 2019

DCIA(Directly Connected Impervious Area) 및 EIA(Efficient Impervious Area)는 불투수층의 하위 개념으로서, 배수관망과 직접 연결된 불투수층을 지칭한다. DCIA는 하천 생태계의 건전성을 예측함에 있어 전체 불투수지역 자료를 사용하는 것보다 정확성이 높다. DCIA는 도시환경에서 녹색 사회기반시설(green infrastructure)과 밀접한 관련이 있는 것으로 알려지면서, 최근에 녹색 사회기반시설 설치에 따른 영향분석을 평가하는 중요한 요소로 자리잡고 있다. 본 연구에서는 도시지역의 정밀 토지피복도를 이용하여 DCIA를 산정하였으며, 이를 이용하여 유출량 해석을 수행한 결과 전체 불투수지역 자료를 사용한 것 보다 높은 정확도를 보였다. 또한 대상유역의 녹색 사회기반시설 설치에 따른 유출량의 변화를 평가 결과 그린인프라 설치로 이한 DCIA의 감소와 이에 따른 첨두홍수량 저감을 확인할 수 있었다. 이러한 결과는 도시유역의 홍수량 저감방안으로서 DCIA 분석을 기반으로 한 녹색 사회기반시설을 보다 적극적으로 도입할 수 있다는 것을 의미한다.

• Land and Housing Review
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• v.7 no.4
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• pp.239-249
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• 2016

This study aims to find implications for urban economic regeneration strategies of local initiative by analyzing of promoting regional strategic industries, both Seongnam and Goyang in terms of regional industrial policy, institution and specialized service agency. The main results based on the case studies are as follows. First, It is a top priority to formulate the policy direction, such as selecting strategic industries and prepare means for improving it. It should keep reliability and continuity for inducing economic units. Second, It is necessary to consider the effectiveness and diversity of institutions. The institutions to be formalized by municipal ordinance and rules for making the successful implementing system of policies. It is necessary to implement strategic industry policy linked with the central government or public organizations for expanding of a diversity of policies. It is necessary to change in viewpoint on the deregulation and tax break for the private sectors as inducements to achieve the regional economy activation. Third, It is necessary to introduce the specialized service agency to improve an effectiveness and efficiency of institutions and accelerate a network within economic units.

• Spatial Information Research
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• v.22 no.4
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• pp.89-102
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• 2014

The establishment and operation of Region-based Teleworking Centers(RTC) in Korea is in the initial stage at the moment. Although some studies have been conducted on telecommuting at home, few studies have been performed on the effects of all-out expansion and diffusion of region-based Teleworking Centers. Therefore, this study analyzed the reduction effect of commuting distance which is possible to obtain from the establishment of Teleworking Centers, based on the network in the Seoul Metropolitan Area, Subsequently, quantitative reduction of the effects of $CO_2$ were calculated from region-based Teleworking Centers. The results of the analysis indicated that region-based Teleworking Centers could reduce a total of 911 tons of $CO_2$ per day. When applying these results to 258 working days per year (according to Statistics Korea), 235,056 tons of $CO_2$ can be reduced annually by the establishment of Teleworking Centers. With quantity on environmental utility to be obtained from the establishment of Teleworking Centers, this study can be utilized as a guideline for selecting effective locations of Teleworking Centers in the future. It can also be helpful in decisions to determine the priority of extending operations of Teleworking Centers through comparisons among administrative districts.

• Journal of the Korean Geographical Society
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• v.33 no.1
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• pp.93-107
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• 1998

The purpose of this paper is to examine the change in the regional characteristics of Y${\={o}}$ju as its economic base has been shifted. From Chosun Dynasty to the mid 1960s, Y${\={o}}$ju had been known as a core of rice production, utilizing favorable natural conditions and well developed river transportation system, with commercial and administrative functions. From the mid 1960s to the mid 1980s, Y${\={o}}$ju had been excluded from the process of the national industrilization, which made Y${\={o}}$ju remain lagged. The transportation system was blocked and the industrial investment in this area was prevented by a variety of restrictive laws. Since the mid 1980s, Y${\={o}}$ju entered into a prosperous are as the land transportation system began to be dramatically improved and some of the restrictions were alleviated. Tecently, diversification and commercialization in the agricultural sector have progressed in land use. In the manufacturing sector, Y${\={o}}$ju becomes a core of the pottery industry in tems of the total amount of its production.

• Journal of the Korean association of regional geographers
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• v.8 no.3
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• pp.281-294
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• 2002

Inhabitants make a specific cultural landscape in various ways according to his culture. In this paper, I consider the characteristics of cultural landscapes distributed in Sangju. I divide Sangju-City Area owing to physical criteria(relief and drainage basin}, appreciate them according to human criteria(administrative district of Joseon Period, dialects, periodical market area} and classify into 6 small regions: (1) Nakyang Region is the traditionally central place based on alluvial plain marginal to Byeongseong stream and Dong stream, and on hills of Sabeol. (2) Nakdong Region is the traffic center which the water transport of Nakdong river and the land transport of Yeongnamdaero cross each other. (3) The upstream region of Byungseong stream is the agricultural region connected with Nakyang Region. (4) Jungmo Region is a intermontane basin where grape cultivation using its specific climate flourish. (5) Wharyeong Region is a mountainous sightseeing district based on the beautiful scenery and Gyeonwhueon's remains of Sogni mountains and Yongyu valley. (6) Hamnyeong Region is the district of Goryeonggaya realm where 3 whites(cocoon, dried persimmon, rice) are abundant.

• Journal of the Korea Society of Computer and Information
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• v.27 no.9
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• pp.69-76
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• 2022

The traveling salesman problem(TSP) is one of the most famous combinatorial optimization problem. So far, many metaheuristic search algorithms have been proposed to solve the problem, and one of them is local search. One of the very important factors in local search is neighbor generation method, and random-based neighbor generation methods such as inversion have been mainly used. This paper proposes 4 new greedy-based neighbor generation methods. Three of them are based on greedy insertion heuristic which insert selected cities one by one into the current best position. The other one is based on greedy rotation. The proposed methods are applied to first-choice hill-climbing search and simulated annealing which are representative local search algorithms. Through the experiment, we confirmed that the proposed greedy-based methods outperform the existing random-based methods. In addition, we confirmed that some greedy-based methods are superior to the existing local search methods.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.28 no.1
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• pp.83-92
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• 2010

Emergence of high-resolution digital aerial cameras and airborne laser scanners have made innovative progress in photogrammetry and spatial information technology. The purpose of this study is to generate true orthoimage by recovering occlusion areas. The orthoimages were generated patch-based transformation. The occlusion areas were mutually corrected by using multiple aerial images. This study proposed a novel method of building roof based orthoimage generation and an effective method of occlusion area detection and recovery. The proposed methods could be efficient to generate true orthoimages in urban areas where occlusion areas are problematic.

• The Journal of Society for e-Business Studies
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• v.19 no.1
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• pp.79-93
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• 2014

IT industry that main domain is future growth engines and convergence industry is based on national development through convergence others industry. However, shortage of advanced IT workforce is not limited to the region and urban. But, Previous studies is comprehensive research on human resource development. Human resource development studies, performance analysis and policy studies, are lacking to achieve the characterization in the region. Accordingly, The need for institutional improvement are appearing for activated regional industry through advanced Human resource development and IT convergence. in this study, we propose in order to improve institutions through IT sector performance evaluation.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.435-435
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• 2023

최근 기후변화의 영향으로 상대적으로 좁은 국가면적이라 할 수 있는 국내에서도 가뭄과 홍수가 지역적으로 동시에 발생하는 등 자연재해에 의한 피해가 빈번해지고 있다. 이 중 가뭄은 타 풍수해에 비하여 일반적으로 장기간의 무강우에 의해 발현되고, 피해가 발생할 경우 생활용수, 농업용수, 공업용수 등 다양한 지역의 용수사용특성에 따라 피해가 집중 및 가중되는 특징을 지닌다. 본 연구에서는 지역별 가뭄피해도에 영향을 주는 영향인자의 민감도 분석을 실시하고 그 결과를 분석하였다. "가뭄 피해도"는 용수별 직간접 피해의 정도를 점수 또는 등급 등의 정량적으로 나타낸 것으로 정의된다. 우선, 국가가뭄정보통계집(2018-2020)에서 제시된 지역별 가뭄피해정보자료와 용수사용특성을 기반으로 군집분석을 실시한 문기훈(2022)의 연구모형을 기반으로 최근 발행된 2021년의 피해정보를 추가적으로 반영하여 군집분석을 실시하였다. 그리고 지역별 가뭄피해도 군집등급에 영향을 주는 과거 피해인자와 용수사용특성을 함수화하고, 지역별 불확실성을 반영한 민감도 분석을 실시하였다. 분석 결과 지역별 과거의 가뭄피해경험여부 및 용수사용특성의 변동에 따라 지역적 가뭄피해도 군집등급이 달라짐을 확인할 수 있었다.