• Land and Housing Review
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• v.10 no.3
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• pp.77-87
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• 2019

In Korea, the modular construction method was applied to the construction of facilities such as military barracks and school dormitories, beginning with the pilot project of Seoul New Elementary School in 2003. In 2017, public modular houses were supplied to Busan(Yongho-dong) and Seoul(Gayang-dong), and modular housing is expected to continue to be supplied in the future. However, there is no clear construction standard for the modular housing construction yet, and there are few cases where the infill modular system is applied. Therefore, this study established the work breakdown structure and proposed a standard process focusing on the infill modular system applied to the construction of Dujeong-dong modular house in Cheonan. Level 1 of the work breakdown structure by construction stage of Infill modular was defined as modular manufacturing, assembly, and finishing process. Level 2 was defined as preparation, modular production, modular infill, modular fixing, floor plastering, building finishing, and other site finishing. Level 3 is defined as 57 detailed unit work of infill modular construction. The standard process of infill modular is proposed for the assembly stage that is commonly applicable to infill modular housing construction. The results of this study can be used for the process plan, transportation plan, lifting plan of modular housing construction.

• Land and Housing Review
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• v.10 no.3
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• pp.67-75
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• 2019

The modular construction means that more than 70% of the parts such as walls, windows, electrical wiring, facility piping, bathrooms, and kitchen appliances are pre-assembled at the factory and transported to the site. It is possible to shorten the construction period than general construction work and to secure high quality through modular mass production since the modular construction works in the field at the same time as the modular production. However, there are only four domestic modular manufacturers, and each company's modular components and construction methods are different, so it is necessary to standardize them. Therefore, this study investigated the construction process centering on the stacking method of modular housing construction work applied to D site in Cheonan-si, and proposed the key points of quality management by construction stage. As the project was conducted as a pilot project for government R&D projects, some differences may occur from general modular housing construction. However, the construction process and quality control focus of each unit box type modular house analyzed in this study can be used as basic data in the future of modular housing construction. In addition, the results of this study can be used to establish construction standards, such as the development of checklists and establishment of standard processes.

• Land and Housing Review
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• v.11 no.3
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• pp.75-82
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• 2020

The urban heat island phenomenon that accelerates global warming has always been controversial when summer heatwaves have occurred since it was first investigated and described by Luke Howard in the 1810s. In Korea, since 2014, government have been interested in Cool Roof and painted white coating on the rooftops of the aging and weak buildings, and the cool roof business has expanded nationwide. However, the roof occupies 20-25% of the entire city surface, much less than 37-45% of the pavement area consisting of roads, parking lots and sidewalks, there is a need to expand the policy of Cool Pavement as a way to reduce the urban heat island phenomenon. Domestic cities are high-rise buildings centered on apartments, and the area occupied by outer walls is larger than that of rooftops compared to foreign low-rise buildings. Therefore, as a way to reduce the urban heat island phenomenon, there is a need for a policy to expand the Cool Roof in buildings and use Cool Wall in parallel. Therefore, this study aims to present the expansion of Cool Wall in buildings and Cool Pavement in urban areas, expanding the installation range of Cool Roof, by comparing and reviewing the thermal characteristics of eco-friendly ceramic coating with excellent thermal proof performance and coatings used for roof waterproofing.

• Land and Housing Review
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• v.11 no.3
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• pp.39-48
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• 2020

Gamcheon village was a poor village in the past, but it recently has boomed as a representative tourists' attraction in the region. Its unique topography and history have played a significant role in the town's growth as a famous tourists' attraction. The factors contributed decisively to the formation of a special spatial structure there. In the process of the town's rapid development as a tourists' destination, however, the tourism overflowed. As such, the interests of the residents and the tourists conflicted, and the segregation between the two has augmented. These gaps seem to have enormously distorted the perception of the spaces as much as they have seriously distracted the existing traffic circulations in the village. The purpose of this study is to identify the differences in spatial perception of both residents and tourists in the Gamcheon village. For the purpose, it assumes the residents' natural movements and the tourists' purposeful movements, and they are analyzed by the space syntax. The major findings are that the circulations of the residents and the tourists in the village are clearly separated and that the two groups perceive the same space completely differently. This confirms the fact that even the same space could be recognized and used in a totally different way depending on the users' purposes.

• Journal of Korean Society for Geospatial Information Science
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• v.10 no.3 s.21
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• pp.107-114
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• 2002

The cadastral surveying is essential for the effective management of a country, the D/B building of NGIS. Many of GPS applications require a positioning accuracy of several centimeters for rover in real-times. But, to achieve higher positioning accuracies in real-time, the double differencing technique should be implemented using carrier phase data. Corrected observations at the reference station can be transmitted and used to form double difference observations at the rover using a data link. In this study, the area accuracy of cadastral survey using the RTK GPS will be assessed, and will produce area of parcel of land. As the result of comparison among area by TS, planer surveying and RTK GPS. parcels-register for site is analyzed by this data. The results show that mean error of area calculated min. $2.42m^{2}{\sim}\;max.\;13.69m^{2}$ and RMSE calculated min. $0.00329\;{\sim}\;max.\;0.01846$.

• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.1684-1688
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• 2007

하천의 수위를 유지하거나 농업용수를 취수할 목적으로 하도 내에 조성되는 보는 현재 국내에 약 18,000개 정도가 있다. 그러나 최근 도시 인구집중화에 따른 농경지의 도시화, 토지이용의 변화, 취수 시설물의 통합, 시설의 노후화 등으로 많은 수의 보가 제 기능을 상실하고 있다. 이러한 보는 하천생태통로의 차단, 미생물 어류의 이동 단절, 수질의 악화 초래, 수변 생물서식처의 변화를 가져오고 있다. 기능이 상실된 보 가운데 곡릉천 곡릉2보를 철거함에 따른 상하류 하상변동을 해석하고자 미공병단의 HEC-6 모형을 이용하여 수치해석을 하였다. HEC-6 모형의 수치해석을 위해 곡릉천의 단면, 유사량, 입도분포, 수위-유량 곡선을 이용하였고, 보 철거 후 시간에 따른 유사이동량의 변화를 파악하고 보 상류의 하상세굴과 보 하류의 퇴적현상을 관찰하였다. 또한 보 철거 후 장기하상변동을 모의한 결과 곡릉천에서의 곡릉2보를 철거함으로 인한 평형하상으로 도달되는 시간은 20년 정도 소요되는 것으로 예측되었다. 이러한 기능이 상실된 보를 철거함으로 인해 하류에 미치는 물리적 영향의 분석은 하천 생태 복원을 위한 기초 자료로서 이용할 수 있을 것으로 판단된다.

• Journal of Environmental Impact Assessment
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• v.21 no.1
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• pp.171-184
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• 2012

하천 수위를 유지하거나 농업용수를 취수 할 목적으로 조성되는 크고 작은 보는 용수공급 시설로 이용되고 있으나, 하천 생물이동의 차단, 보 상류부의 수질악화, 수변 생물서식처의 변화, 하천경관 훼손과 같은 환경적 문제를 초래하고 있다. 더욱이 도시화가 진행됨에 따라 토지이용의 변화, 시설의 노후화 등으로 매년 50~150개 정도의 보가 폐기되고 있는 현실이다. 본 연구는 하천에 설치되었으나 용도와 기능이 상실된 보를 철거하여 생태적 연속성을 확보하고 하천 본래의 모습으로 되돌려 주며, 하천의 생태적 건강성을 회복 및 향상 시키고자 하였다. 보 철거 시범사업으로 공릉천에 설치된 길이 76m, 높이 1.5m의 공릉2보와, 한탄강에 설치된 길이 190m, 높이 2.8m의 고탄보를 철거하였고, 각 시범사업 대상지의 물리/화학/생태특성 모니터링 분석을 수행하였다. 그 결과 철거 직후 보의 직 상류부에 전체적으로 침식이 발생하고, 보 하류부는 여울, 하중도, 사주, 침식 등 다양한 지형으로 변모되었다. 본 연구를 통하여 하천복원의 취지에 맞는 하천 본래의 모습에 가까운 하천으로 복원하기 위해서는 기능 및 용도가 상실된 보의 경우는 기존의 보체를 개량하거나 어도를 설치하여 주는 것 보다 구조물 자체의 완전철거를 통한 생물 이동통로 조성이 바람직하다고 판단된다.

• Journal of the Korean Regional Science Association
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• v.33 no.3
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• pp.61-78
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• 2017

Among several policies for industrial decentralization introduced since the 1960s, business relocation grant policies put a heavy financial burden on central and local governments. This study investigates the change in the likelihood of manufacturing establishments' relocation to the non-SMA associate with the change in business relocation grant policies. Using the mining and manufacturing survey data from 1996 to 2014, manufacturing firms' relocation decision model in nested logit structure was estimated. The data showed that the proportion of movements from the SMA to the non-SMA significantly increased after the introduction of the grant policies. However, estimation results of firms' relocation decision model indicated that the likelihood of firms relocating from the SMA to the non-SMA decreased after the introduction of the grant policies. In particular, firms' likelihood to move into the rural regions is even lower in the period of the grant extension. This suggests that increasing rate of relocations toward the rural regions may have been driven by the growing advantage of rural locations, such as low land rent and improvement in market accessibility, rather than the grants per se. This implies that the alleviation of physical and environmental constraints of the rural regions and the creation of business friendly environment such as easy access to premises at reasonable prices and strengthened linkage with the SMA, rather than simple provision of business relocation grants, needed to attract businesses in the rural regions.

• Journal of Korean Society of Forest Science
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• v.110 no.1
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• pp.22-34
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• 2021

The implementation of the sunset provision of unexecuted urban parks in Seoul has been postponed; however, the mentioned parks still remain vulnerable since they can be subject to development under certain circumstances. Local governments may purchase the parks to prevent their loss but are constrained due to limited resources. The purpose of this study is to prioritize the purchase of unexecuted urban parks in Seoul based on landscape connectivity, which represents the important role of allowing the movement of wildlife and providing biodiversity in urban environments. In this study, we used four potential scenarios (PB100, PB1, PA100, PA1), which reflects the degree of land cover change resulting from the implementation of the sunset provision, and the role of Han River as a conduit or barrier for wildlife movement. Landscape connectivity was evaluated by calculating current flow betweenness centrality (CFBC). This was used to rank the importance of the unexecuted urban parks in Seoul. The results demonstrated that the implementation of the sunset provision will greatly decrease the connectivity of all parks in Seoul and particularly more so for parks in the southern part of the city. In addition, the results suggested that the low connectivity of Han river will diminish the connectivity around Bukhansan Mountain in the northern part of Seoul. Our study can be used for the prioritization of purchase, since it has the ability to evaluate the anticipated vulnerability of each park's connectivity after the sunset provision.

• Korean Journal of Environment and Ecology
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• v.33 no.3
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• pp.354-365
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• 2019

This study measured and analyzed the weather characteristics and the air-ion characteristics of walking space by land use type in Chungju, Chungcheongbuk Province during the heat wave. We used the land registration map to classify the type of land use in walking areas in the studied into the production and green area, the residential area, and the commercial area. We then selected 44 measurement points in about 4.1 km. They included 12 walking space points in the green area, 14 in the residential area, and 18 in the commercial area. Moreover, we calculated the ion index by analyzing the impact of weather factors such as temperature, relative humidity, solar radiation, and net radiation in the walking space on the anion generation and cation generation by land use type during the heat wave. Comparison of air ion characteristics in walking space by type of land use during the heat wave showed that the average cation generation was in the order of commercial area ($700.73cations/cm^3$) > residential area ($600.76cations/cm^3$) > green area ($589.73cations/cm^3$). The average anion generation was in the order of green area ($663.95anions/cm^3$) > residential area ($628.48anions/cm^3$) > commercial area ($527.48anions/cm^3$). The average ion index was in the order of green area (1.13) > residential area (1.04) > commercial area (0.75). This study checked the weather characteristics, cation generation, and anion generation in walking space according to the land use type during the heat wave and checked the difference of ion indexes in the walking space according to the land use type. However, there were limitations in the lack of accurate comparison according to the land use due to the moving measurement and the insufficient quantitative comparison according to the change of road width. Therefore, we recommend further studies that consider the road characteristics.