• 한국지역지리학회지
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• 제20권1호
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• pp.30-48
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• 2014

본 연구는 도시 간 상호작용 지수(지배력 지수, 상대적 강도 지수, 엔트로피 지수)를 활용하여 출근 흐름과 업무 흐름, 화물 흐름에 있어서 수도권 도시 네트워크의 구조적 특성을 분석하였다. 분석 결과는 수도권의 도시 네트워크가 흔히 네트워크형 도시체계론에서 말하는 수평적이고 상호보완적이며 양방향과 규모 중립적이기 보다는 매우 규모 의존적이고, 수직적이고 최고차 중심도시에 의존적하는 지배 종속적 구조를 가지고 있는 것으로 나타났다. 출근 업무 흐름에 비해 화물 흐름의 네트워크가 다소 균형적이기는 하지만, 상호작용의 계층 구조, 흐름의 상대적 강도, 균형성 등 모든 면에서 출근 업무 흐름이든, 화물 흐름이든 서울과의 상호작용이 결정적이다.

• Journal of Construction Engineering and Project Management
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• 제2권4호
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• pp.32-41
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• 2012

In recent times, multi-centralization and decentralization as well as large Capital area and suburbanization in the spatial structure of capital area. With rapid growth, urbanization and industrialization are unsystematic, and growth inequality between regions caused negative effects such as discordant centralization and decentralization, fluctuating land value, and gap between living conditions. Accordingly, this study analyzed urban spatial indexes by the self-governed body in the capital area such as Seoul, Incheon, and Gyeonggi province for the analysis of the regional inequality phenomenon. We examined the characteristics of temporal and spatial changes in urban spatial structure in the capital area by utilizing the distribution pattern and density of city indexes such as population, employment, etc, and then drew the commonality of those factors through factor analysis. We evaluated the drawn results through the city standard index by each city, conducted factor score analysis, and identified the interaction between each factor and Housing Purchase Price Composite Indices index, housing rent price index(Housing Jeonse Price Composite Indices), land price fluctuation rate, diffusion ratio of house, and financial independence.

• 농촌계획
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• 제15권1호
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• pp.47-59
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• 2009

The aim of this study is to analyze the green-tourism centrality considering spatial interaction using Gravity Model and social network method. The degree centrality and prestige centrality were applied as green-tourism centrality index. The rural amenity resources and human resources were counted as attraction factors, and a distance among villages was used as friction factor in gravity model. The weights of rural tourism amenity resources were calculated using the analytic hierarchy process(AHP) method and applied to evaluate green-tourism potentiality. The distance was measured with the shortest path among villages using geographic information system(GIS) network analysis. The spatial interaction from gravity model were employed as link weights between nodal points; a pair villages. Using the spatial interaction, the degree-centrality and prestige-centrality indices were calculated by social network analysis and demonstrated possibility of developing integrated green-tourism region centered on high centrality villages.

• 농촌계획
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• 제14권4호
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• pp.109-119
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• 2008

The objectives of this study are to develop a green tourism potential evaluation method with rural amenity and demand of citizen. The new index which was named GPD(green tourism potential degree) is designed to propose the green tourism potential of rural areas using spatial analysis of geographic information system and spatial interaction of gravity model. And in order to evaluate the green tourism potential with supply side and demand side, two indices were defined; One is green tourism demand degree(GDD) which is developed to quantify a demand side potential by the analysis of urban population and urbanization index, and the other is green tourism attraction degree(GAD) which is developed to quantify a supply side potential by the analysis of rural amenity values using AHP algorithm, based on opinion of related experts. The developed method was applied to a part of Kyounggi province, Seoul and Incheon. All the study area's GAD, GDD and GPD were assessed and the proposed green tourism potential evaluation method could be used in developing rural development plans and green tourism policies considering spatial interaction with citizen and green tourism resources.

• 한국환경복원기술학회지
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• 제12권3호
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• pp.21-32
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• 2009

Coastal sand dune area is the important ecosystem as an ecotone which located between coastal area and terrestrial area. Moreover, it is very complicate landscape that have geomorphological interaction between erosion and accumulation of sand. Therefore, it is necessary to understand the sand dune ecosystem in view point of landscape scale including background landscape affecting origin of sand dune. Landscape ecological approach in the complicate ecosystem already started in developed countries, and it is applied to land management and biodiversity conservation strategies even in national scale. In this paper, landscape ecological analysis using landscape pattern analysis was carried out on 7 study areas (Yellow Sea : Hakampo and Doksan, South Sea : Namyeol and Balpo, East Sea : Hosan, Hupo and Goraebul) in Korean coastal sand dune ecosystem. Landscape elements were composed by 9 elements in these study areas. Major background landscape elements was the forest land and agricultural field. Namyeol (S06) has larger patch landscape compare to other areas. In patch shape indices, Hupo (E10) shows more complicate patch shapes. The high landscape heterogeneity showed in the Doksan sand dune area and that of Hosan. It shows that these areas were composed by various patch types. However, using landscape indices have to use very carefully because several variables have influence to the result such as scale and spatial pattern of study areas. Although landscape analysis through landscape indices shows sometimes difficult to explain the ecosystem, landscape scale approach on ecosystem assessment still useful to interpret in ecological process in large range of habitat.

• Journal of Mechanical Science and Technology
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• 제18권5호
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• pp.857-864
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• 2004

The change in the NO emission indices (EINO) in a two-dimensional plane has been investigated, which is due to the interaction between a vortex and methane-air flames established at different equivalence ratios, by solving the field equation. After solving the field equation, the spatial distribution of G-values is obtained. The NO emission index is calculated after applying the appropriate relation between the G-values and the NO production rate or the mass fraction of methane obtained from the library of freely propagating flames created from detailed simulations. When a vortex exists in a reacting flow field, in general EINO slightly increases, whereas ElNO is lowered in the vicinity of the vortex regardless of flow direction. A change in vortex size has negligible impact on EINO$\_$T/ but increasing the vortex strength slightly increases EINO$\_$T/ in the domain of this study.

• Structural Engineering and Mechanics
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• 제82권1호
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• pp.1-16
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• 2022

This work elaborately investigates the influences of the guideway geometry parameters and track irregularity on the dynamic performances of the suspended monorail vehicle-guideway system (SMVGS). Firstly, a spatial dynamic analysis model of the SMVGS is established by adopting ANSYS parameter design language. Then, the dynamic interaction between a vehicle with maximum design load and guideway is investigated by numerical simulation and field tests, revealing the vehicle-guideway dynamic features. Subsequently, the influences of the guideway geometry parameters and track irregularity on the dynamic performances of the SMVGS are analyzed and discussed in detail, and the reasonable ranges of several key geometry parameters of the guideway are also obtained. Results show that the vehicle-guideway dynamic responses change nonlinearly with an increase of the guideway span, and especially the guideway dynamic performances can be effectively improved by reducing the guideway span; based on a comprehensive consideration of all performance indices of the SMVGS, the deflection-span ratio of the suspended monorail guideway is finally recommended to be 1/1054~1/868. The train load could cause a large bending deformation of the pier, which would intensify the car-body lateral displacement and decrease the vehicle riding comfort; to well limit the bending deformation of the pier, its cross-section dimension is suggested to be more than 0.8 m×0.8 m. The addition of the track irregularity amplitude has small influences on the displacements and stress of the guideway; however, it would significantly increase the vehicle-guideway vibrations and rate of load reduction of the driving tyre.

• 대한교통학회지
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• 제34권2호
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• pp.107-122
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• 2016

이 연구는 교통수요모형에 기반한 자동차 배출량 산정 시 존내 배출량이 누락되는 문제를 보완하기 위해, 교통수요모형과 결합하여 활용될 수 있는 존내 배출량 산정 모형을 정립하는데 목적이 있다. 특히 "도시-교통의 상호작용에 기안하여, 도시공간구조는 접근도에 영향을 미치고, 이는 사람들의 통행행태에 영향을 미친다."는 이론에 근거하여, 본 연구는 도시 도로의 구조적인 특성을 정량화할 수 있는 공간 구문론(Space Syntax) 이론 등을 활용하여 존내 통행거리, 존내 통행량, 존내 평균 통행속도, 그리고 이들을 조합한 존내 배출량 추정 모형을 구축하였다. 연구 결과, 도시 공간 구조는 존내 배출 특성에도 영향을 미치는 것으로 나타났으며, 특히 압축도시이고, 대지 면적이 좁고, 난개발 지수가 낮고, 격자형 도시일수록, 존내 자동차 배출량은 적게 배출되는 것으로 나타났다. 지역의 공간적 특성을 반영하여 구축된 본 연구 모형은 기존 모형에 비해 약 44-46% 높은 설명력을 보였다. 이를 수원시 자전거 도로 개선사업에 적용하여 배출 저감량을 산정한 결과, 존간 배출 저감량만 고려한 기존 결과와 비교해 약 2배 높은 배출 저감량이 산정되었다. 본 연구결과는 국가 배출량 산정에의 활용 및 다양한 교통-환경 정책의 효과 평가에도 유용하게 활용될 수 있을 것으로 기대된다.

• 한국지리정보학회지
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• 제24권4호
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• pp.99-112
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• 2021

본 연구는 기존 연구에서 수행된 전국 단위의 정량적 산지면적 변화량을 공간적으로 배분하여 광역시도별 산지면적 변화를 추정함으로써 지역산림계획의 수립을 지원하기 위해 수행되었다. 토지를 산지, 농지, 도시 및 기타지로 구분하고 토지이용 형태별 변화 여부를 종속변수로, 지형요소, 이용 제한요소, 사회·경제적 요소, 개발 인프라를 독립변수로 하는 로지스틱 회귀모형을 개발하였다. 우리나라 전체를 30m×30m 격자로 분할하여 각 Cell에 해당하는 독립변수 자료를 구축하였고, 로지스틱 회귀모형을 이용하여 각 토지이용 형태가 타 유형으로 변화하는 확률을 추정하였다. 추정된 토지이용 변화확률을 기반으로 변화순위 지도를 구축하였고, 연도별 토지이용 변화량을 변화순위에 따라 순차적으로 배분함으로써 토지이용 변화의 공간적인 변화를 분석할 수 있었다. 경사도와 지자체별 개발 가능한 경사도 기준이 산지가 도시 및 기타지로 변화될 확률에 가장 큰 영향을 미쳤으며, 경사도와 개발 가능한 경사도 기준이 낮을수록, 토지가격과 인구밀도가 높을수록 산지가 도시 및 기타지로 변화될 확률이 높아졌다. 그 결과 2027년까지 수도권과 대도시의 산지가 도시 및 기타지로 변화하여 산지면적이 크게 감소하였다. 그러나 2028년 이후 2050년까지 서울, 경기, 제주를 제외한 대부분의 지역에서 산지면적이 빠르게 증가하는 것으로 예측되었는데, 이는 지방 소도시의 급격한 인구감소에 기인하는 것으로 분석되었다. 이에 중앙정부에서는 변화하는 산지면적에 대응하기 위해 산지관리 정책의 전환이 필요하고, 지자체 단위에서는 인구의 감소 정책과 그에 따른 산지를 포함한 토지의 효율적 보전 및 이용체계를 수립하는 것이 필요할 것으로 사료된다.