공간정보를 이용한 어린이 보행 안전 설계기술 개발

조기혁(Cho, Gi-Hyoug) 한국측량학회 2021 한국측량학회 학술대회자료집 Vol.2021 No.11

스마트한 도시를 위한 넛지 기술의 적용

조기혁(Cho, Gi-Hyoug) 대한국토·도시계획학회 2019 도시정보 Vol.- No.453

Estimating Cooling Effect of Neighborhood Parks Using Random Forest Prediction Model

Ha-Wook Jung(정하욱),Gi-Hyoug Cho(조기혁) 한국태양에너지학회 2020 한국태양에너지학회 학술대회논문집 Vol.2020 No.6

코로나 전후 유입인구 변화 관측 및 요인 분석

최홍석(Hong Seok Choi),조기혁(Gi-hyoug Cho) 한국측량학회 2021 한국측량학회 학술대회자료집 Vol.2021 No.11

재난회복력을 바탕으로 한 도로 복구 우선순위 지수 개발

심재웅(Jaewoong Sim),조기혁(Gi-Hyoug Cho) 한국방재학회 2023 한국방재학회논문집 Vol.23 No.4

최근, 대규모 지진 및 재난 피해가 발생함에 따라 피해 경감을 위한 긴급대피로 및 방재도로의 개념이 확장되고 있다. 재난상황 시 도로는 주민들의 대피 및 물자 수송의 기능을 가지며, 초동 대응 및 재난 복구에 중요한 역할을 하고 있다. 본 연구는재난회복력과 교통 네트워크의 관점에서 재난 상황 시 방재도로로 활용될 수 있는 도로의 중요도를 산정하며, 재난 복구 목적과 도로의 기능에 따라 6가지 유형의 도로 복구 우선순위 지수를 개발하였다. 본 연구에서 개발한 복구 우선순위 지수를바탕으로 재난 대응에 있어 단기적으로 중요한 도로와 장기적으로 중요한 도로를 파악할 수 있었다. 개발된 지수를 바탕으로재난 상황 시 도로의 복구 우선순위를 선정하고 신속하게 복구한다면 지역의 재난회복력을 높일 수 있을 것으로 기대한다. The concept of disaster response routes for damage reduction has emerged owing to recent large-scale earthquakes. Disaster response routes play an important role in the initial disaster response and recovery by evacuating populations and transferring supplies for disaster response. This study estimated the importance of each road that can be used as a disaster response route after the outbreak of disaster from the viewpoint of disaster resilience and network centrality and developed six types of priority indexes for road recovery based on the purpose of disaster recovery and the function of the disaster response route. Using these priority indexes developed in this study, critical roads for disaster recovery can be identified in short- and long-term periods. Disaster recovery is assumed to improve if disaster response routes are promptly assigned and restored based on these priority indexes.

공원 크기에 따른 공원의 온도저감 효과 분석

박종화(Park, Jong-Hwa),조기혁(Cho, Gi-Hyoug) 대한국토·도시계획학회 2016 國土計劃 Vol.51 No.5

To solve the problem of intensified urban heat island effect in the city, development of green spaces and parks are proposed as one of effective interventions for mitigating urban heat island effect. Accordingly, substantial number of studies have investigated the role of urban parks, in particular, associations between park sizes and cooling effect. However, it is still unknown whether distance decay of the cooling effect varies by the park sizes. This paper aims to explore cooling effect of park by size, find a minimum size of parks after controlling other environmental variables, and investigate variations of distance decay of the cooling effect by size. Examining cooling effect of 37 parks in Ilsan new town, Korea, this study derived land surface temperature of Ilsan from Landsat 8 data while controlled NDVI, NDBI, Albedo, landuse and DEM that may affect land surface temperature. The size of selected parks was categorized to 10 classes. The results of multiple regression showed that the cooling effect tends to increase as park size grows. Empirical analysis indicated that cooling effect of parks on adjacent land was found when the park size was larger than 6,000㎡ . Distance decay of the cooling effect on adjacent land, however, was shown to be sharper when the park size increased, thus park size was not found to be an influential factor to increase maximum cooling distance.

비선호시설의 재개발 관련 공약이 주택가격에 미치는 영향: 창동차량기지 개발 사업과 노원구 아파트를중심으로

노서연(Nho, Seoyeon),조기혁(Cho, Gi-hyoug) 한국지역개발학회 2022 韓國地域開發學會誌 Vol.34 No.2

Urban redevelopment projects that transform the urban function and image of locally unwanted land use facilities can improve the quality of the living environment and also generate the expectation of a rise in real estate values in and around the project site. Prior studies show that urban development projects can activate the housing market and induce speculation. The release of plans or blueprints of such projects is often closely related to local elections. This paper examines the influence of the announcement of transforming locally unwanted land use on housing prices near Chang-dong Garage in Nowon-gu, Seoul. The study site, a facility considered a LULU, has been receiving public attention for the past two decades. Focusing on the initial announcement date of the development plan which coincides with local elections in 2010, 2014, and 2018, apartment sales data in Nowon-gu are examined using Difference-in-Difference Hedonic price models. The results showed that proximity to the garage location was negatively associated with the housing price in 2010, but its influence changed positively in the 2018 model. The findings imply that the influence of LULU on housing price can be changed by policy and environment development of a specific period and a refinement level of election pledges seem to be associated with the size of the influence.

도시개발사업 유형에 따른 건물 에너지소비량 분석

신수현(Shin, Sue Hyeon),조기혁(Cho, Gi Hyoug) 한국측량학회 2021 한국측량학회 학술대회자료집 Vol.2021 No.11

압축도시의 물리적 요소가 보행자 교통안전에 미치는 영향

박유나(Park, Yuna),이가인(Lee. Gain),조기혁(Cho. Gi-Hyoug) 대한국토·도시계획학회 2016 國土計劃 Vol.51 No.2

Hypothetically, a compact city form decreases Vehicle Miles Travels (VMT) and the reduced VMT indicates lower exposure of pedestrian crash. The evidences of empirical studies, however, have shown a mixed findings. We speculate that the mismatches between theory and empirical evidences may be caused by the spatial scale of study areas, focusing on spatial distribution feature of job and housing density. To explore the relationship between compactness of the built environment and pedestrian crash, we conducted regression analysis at both city and neighborhood scale. The results showed that the association between compactness and pedestrian crashes varies by the spatial scale of study areas. At the city scale, the compactness does not have a significant association with pedestrian safety, whereas, at neighborhood scale, density of employment was associated with greater risk of pedestrian crash while population density was negatively associated with pedestrian crashes. The finding implies that the spatial distribution of housing and jobs do an important role in pedestrian safety. In addition, we found larger than moderate level of confounding effect of demographic features in explaining pedestrian crash risk.

COVID-19로 인한 도시 활력의 감소와 회복

엄현주(Hyunjoo Eom),최홍석(Hongseok Choi),조기혁(Gi-Hyoug Cho) 한국방재학회 2022 한국방재학회논문집 Vol.22 No.3

Urban vitality is the quality and the intensity of human activity within the urban space that represents the liveliness and the energy of cities. The spread of COVID-19 and the enforcement of social distancing policies have drastically reduced urban human activities and impacted the local economy, which has brought attention to the concept of urban resilience against COVID-19. Urban resilience can be understood as the capacity of a city’s systems to endure a crisis, minimize the impact of a crisis, and recover to a normal state from a crisis. The purpose of this paper is to quantitatively assess the levels of resilience of communities in Seoul, South Korea, using the social-ecological resilience model and the resistance-recovery ratio. The proposed framework for measuring resilience identifies the communities' capacity to resist the crisis, recover, and adapt to the recovered state, which provides a comprehensive understanding of urban resilience after COVID-19. 도시 활력은 도시공간의 역동성, 활동성을 나타내는 지표로써 도시 활력이 높을수록 도시공간이 잘 활용되고 있음을 의미한다. 전 세계적인 코로나 감염병의 확산으로 인한 개인이나 집단 간 접촉을 최소화하는 ‘사회적 거리두기’ 정책의 여파로 지역유동 인구 및 지역경제가 크게 위축되었으며 위기를 극복할 수 있는 지역사회의 대응 역량에 관한 관심이 높아졌다. 지역별 외부 충격에 대한 민감도, 회복 수준, 그리고 회복 이후 시스템 변화에 대한 적응력에 있어서 차이가 존재하였으며 이는 지역의 회복탄력성으로 설명할 수 있다. 본 연구에서는 코로나 감염병 1차 유행 시기를 대상으로 지역별 도시 활력의 감소와 회복 수준을 정량적으로 분석하는 방법으로 사회 생태적 회복탄력성(Social-Ecological Resilience) 모형을 제시하며 외부 충격에 대한 지역의 회복 수준을 회복탄력 비(Resistance-Recovery Ratio)를 이용하여 분석하였다. 본 연구는 코로나 감염병 확산에 대한 지역사회의 민감성(저항력), 위기 상황 이전 수준으로 회복하는 지역별 회복 역량, 그리고 회복 이후 시스템의 적응력을 측정하여 지역별 위기 상황에 대한 대응을 포괄적으로 이해하는 데 의의가 있다.