• Journal of the Korean Geographical Society
• /
• v.33 no.spc
• /
• pp.739-744
• /
• 1998

1950년대 이후 일본의 많은 도시지역에서는 구릉지를 중심으로 한 택지개발이 활발히 이루어져왔고, 그 결과 이 지역의 지형은 절개와 매립에 의해서 많은 변화를 겪게 되었다. 그런데, 1978년, 1993년, 1995년 등에 발생한 지진에 의해 이러한 택지에 건설된 주택의 상당한 수가 피해를 입었다. 지진의 피해를 특히 많이 받은 주택들의 대부분은 절개지와 매립지 사이에 위치한 것들이었다. 이를 통해 지형 및 그 변형에 관련된 토지의 상태와 지진에 의한 주택의 피해정도 사이에는 상관관계가 성립한다는 것이 입증되었다. 심포지움에서, 연구자는 GIS를 이용한 분석법을 활용하여 일련의 사례 연구들을 제시할 것이다.

• Journal of the Korean Association of Geographic Information Studies
• /
• v.17 no.1
• /
• pp.24-34
• /
• 2014

To understand urban space and make appropriate plans, the integrative analyses considering road and land use simultaneously are required. In addition, studies that involve both horizontal and vertical spaces must be taken into consideration. Therefore, the purpose of this study is to conduct a classification analysis of road network-based land use considering spatial structure. The methods of this study were as follows; first, a space syntax theory considering the structure of road network was introduced for roads. For land use, to consider both horizontal and vertical development densities of residential and commercial buildings were used. And the explanatory power of three variables-Euclidean distance, global integration and length-reflected global integration-were compared. Third, based on road as an appropriate variable, modified-IPA was conducted with land use and the results were categorized into four areas. The proposed method was applied to Gangnam-gu, a CBD area in Seoul, and results were analyzed and visualized using GIS.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2015.05a
• /
• pp.442-442
• /
• 2015

최근 도시 집중화 개발사업의 증가로 인해 유역의 유출환경이 크게 변화하고 있다. 특히, 도시화에 따른 불투수층 토지가 크게 증가함에 따라 지표면의 이용과 형질이 변형됨으로써 지표수 흐름과 지하수 함양 및 오염 등의 문제가 심각하게 대두되고 있는 실정이다. 제주도는 관광객 증가로 인한 각종 개발사업이 지속적으로 추진되고 있으나, 사전재해 영향성검토에서는 개발사업 소유역을 중심으로만 평가하고 있어 하천유역의 도시화에따른 홍수재해 영향은 검토하지 못하고 있는 실정이다. 따라서 본 연구에서는 제주도 도심하천인 한천유역을 대상으로 국가 수자원관리 종합시스템과 환경부에서 제공하는 1980년부터 2005년까지 5년 주기의 토지피복도를 이용하여 유역 내 토지이용 변화를 분석하고 호우사상에 따른 홍수유출 변동을 분석하여 토지이용 변화가 홍수유출량 미치는 영향을 도출하고자 한다.

• Land and Housing Review
• /
• v.2 no.1
• /
• pp.79-85
• /
• 2011

The bearing capacity of a soil can be improved by conventional ground improvement techniques such as stabilization and compaction methods. Recently, the use of geotextiles in improving the bearing capacity of soils has become popular because of the availability of durable and strong geosynthetic materials. In this paper, through the laboratory model tests on sandy ground reinforced by geotextiles with the strip footing under plane strain condition, the effects of bearing capacity improvement on the sandy ground and its behaviour were investigated.

• Journal of the Korean Society of Groundwater Environment
• /
• v.6 no.2
• /
• pp.87-94
• /
• 1999

This study is providing Modified DRASTIC Model to which lineament density and land use are added as additional factors using geographic infomation system(GIS). and then to evaluate groundwater contamination potential of Pyungtek-Gun area in Kyunggi-Do. In this study. the reason for using additional factors is because. in case of lineament density. when we consider that most of aquifer is bedrock aquifer in hydrogeologic environment of the Korea, lineament is very important to flow of groundwater and contamination material. and because land use can reflect indirectly impact of point or non_point source in study area. For statistical analysis. vector coverage per each factor is converted to grid layer and after each correlation coefficient between factors, covariance, variance. eigenvalue and eigenvector by principal component analysis of 3 direction. are calculated. correlation between factors is analyzed. Also after correlation coefficients between general DRASTIC layer and rated lineament density layer and between general DRASTIC layer and rated land use layer are calculated. final modified DRASTIC Model is constructed by using them with each weighting. when modified DRASTIC Model was compared with general DRASTIC Model, comtamination potential in modified DRASTIC Model is fairly detailed and consequently. vulnerable area which has high contamination potential could be presented concretly.

• Journal of the Korean Geographical Society
• /
• v.45 no.2
• /
• pp.275-292
• /
• 2010

This study investigated the land-cover changes in the tidal flat of the Taean peninsula due to man-made environmental changes between 1972 and 2008, through time-series analysis based on a modified post-classification comparison method and multi-temporal satellite images. The analysis revealed that the land-cover of the tidal flat has changed from tidal flat to wetland and from wetland to paddy field between 1972 and 2008. Also, the pattern of detailed land-cover changes is as follows: tidal flat to wetland; lake and saltpan to bare land and paddy field. The accurate classification of each image is needed for the application of the post-classification comparison method. The overall accuracy of the classified images was found to be 95.33% on average, and the Kappa value was 0.941 on average.

• Land and Housing Review
• /
• v.6 no.1
• /
• pp.21-29
• /
• 2015

Coupling beams posses proper strength, stiffness and ductility capacities to resist efficiently under seismic loads. The strength, stiffness and ductility capacities for special diagonally reinforced concrete coupling beam with a span-to-depth ratio 2.0 or less is higher than those of coupling beam with conventionally reinforced concrete coupling beam. However, diagonally reinforced detailing creates major construction problem. In this study, design alternatives for diagonally reinforced concrete coupling beams were experimentally investigated. The results show that angle reinforced coupling beam(specimen SA) exhibited a better stable behavior in comparison with non-diagonally coupling beams(specimens SB-series) and sustained corresponding drift ratio, peak-to-peak stiffness and cumulative dissipated energy in comparison to diagonally coupling beam(specimen CA).

• Land and Housing Review
• /
• v.7 no.1
• /
• pp.31-41
• /
• 2016

In this paper, we propose experimental results, which target the major variables that influence the structural performance of a wall, as well as the resulting seismic and hysteretic behavior. Results also provide the basis for the application of performance based design by identifying the nonlinear hysteretic behavior of the wall with boundary element details recently proposed in previous study by Chun et al(2011). From the experimental results, the crack and fracture patterns of a specimen, which adopt the proposed boundary element details, showed similar tendencies regardless of whether axial force or high performance steel bars is applied. Furthermore, results show that the maximum strength of the specimen can be predicted accurately based on the design equation proposed by the standard. In addition, with a higher axial force, there is a tendency that both the initial load and maximum strength increase as deformation capacity reduces, requiring consideration of the reduced deformation capacity due to a high axial force. For walls under such high axial forces, using high performance steel bars is a very effective manner of enhancing deformation capacity. Therefore, reinforcing the plastic hinge region with boundary elements using high performance steel bars is preferable.

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
• /
• 2000.09a
• /
• pp.120-125
• /
• 2000

연안역의 토지이용이 극대화됨에 따라 연안구조물이나 항만구조물의 축조가 활발히 진행되고 있다. 이를 설계하는데 있어서 무엇보다 중요한 것은 천해설계파 등과 같은 파랑변형계산을 얼마만큼 실현상과 근사시켜 재현할 수 있는지의 여부에 달려 있다. 지금까지의 천해설계파 산정에 있어서는 주로 단일 주파수와 단일 방향에 대한 규칙파해석이 수행되어져 왔으나, 실제해역에서의 파랑은 수많은 주파수와 파향, 파고들이 합성되어 이루어진 다방향 불규칙파랑이므로 실제 해역의 자연현상이 잘 표현되었다고 보기는 어렵다. (중략)

• KDI Journal of Economic Policy
• /
• v.16 no.2
• /
• pp.21-49
• /
• 1994

공시지가제도하에서 개별필지 가격산정은 지가함수(地價函數) 추정, 비준표(比準表) 작성, 인근 유사 표준지(標準地)와의 특성차이를 감안한 가격결정 과정을 거치는데, 각 단계의 기술적 문제에 대한 연구는 별로 없었다. 이 글은 지가함수(地價函數) 추정에서 log-log함수형태가 통계학적으로 또는 실제 활용상 적합한가의 문제와 지가함수(地價函數) 추정결과를 그대로 지가예측식(地價豫測式)으로 이용할 수 있는가의 두가지 문제를 다루고 있다. 서울시 서초구와 강남구자료에 대해 Box-Cox 변형(變型)을 이용한 지가함수(地價函數)와 log-log형태의 지가함수(地價函數)를 추정하여 비교해 본 결과 통계학적으로는 전자가 우월하지만, 지가추정(地價推定)에서 양자간의 차이는 크지 않았으며 추정비용(推定費用), 활용(活用)의 용이성 등의 관점에서는 후자가 선호되었다. 또 지가함수(地價函數) 추정결과를 현재와 같이 표준지와 여타 토지간의 가격차이(價格差異)를 계산하는 용도로 한정하는 것이 표준지가격(標準地價格) 자체가 가진 정보를 활용하는 방안으로 바람직하다는 결론을 얻었다.