• Journal of agriculture & life science
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• v.52 no.6
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• pp.139-153
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• 2018

This study analyzes the economic effect of rehabilitation and upgrading of reservoirs as a prevented method against natural disasters under recent abnormal weather conditions and dam-break. For the analysis, we divide the purpose of rehabilitation and upgrading of reservoirs into the stable supply of rural water under uncertain weather conditions and the prevention of collapse due to the aging of the reservoir. We measure the economic effect of rehabilitation and upgrading of reservoirs by estimating the resident's willingness-to-pay for the project through Contingent Valuation Method(CVM). The result shows that distributions of willingness-to-pay to prevent natural disasters and dam-break are similar to each other. About 66% of the residents in sample regions are willing to pay for the project. The resident's willingness-to-pay to protect natural disasters and dam-break are 32,250 to 46,147 won and 28,427 to 47,308 won respectively on average for all sample regions. The comparison of willingness-to-pay by type of regions shows that paddy field areas are the highest followed by facility cultivation areas and urban areas. In addition, total expected value of the projects calculated based on the resident's willingness-to-pay for paddy field areas and facility cultivation areas are much larger than actual project costs. This implies that rural residents are fully aware of the importance of the project to prevent natural disasters and dam-break and are willing to pay for additional costs if needed.

• Korean Journal of Remote Sensing
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• v.39 no.5_4
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• pp.1165-1172
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• 2023

Recently, Korea has declared carbon neutrality by 2050. The Korea Forest Service is promoting the precision and high technology of forest resource surveys. As such, the demand for forest resource management is increasing, and the need to build a digital twin of forest space is increasing. However, to date, digital twin has only built and provided virtual city services, which are city and nationwide digital twin environments. Three-dimensional digital twin services targeting forest space are not operated and provided. Therefore, in this study, we aimed to implement a forest digital twin environment to provide 3D forest spatial information services corresponding to vertical information such as tree-level height and thorax diameter. By lightweighting realistic 3D tree models and applying 3D Tiles, we confirmed the feasibility of implementing a forest digital twin environment for 3D forest spatial information services. Through continuous research, we plan to implement a forest digital twin that can deploy and service 3D tree models for trees nationwide, including street trees in urban areas. This is expected to enable the development of forest digital twin services for forest resource management.

• Korean Journal of Construction Engineering and Management
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• v.19 no.3
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• pp.97-104
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• 2018

This paper aims to evaluate the performance of S University's Premier Global Construction Engineer Training Program. The net impact of the program is evaluated through a quasi-experiment design approach. The competency level of an individual participant is compared with that of a non-participating expert with similar professional background. The results show that the training program contributed to a significant improvement in the professional competencies of the participating students. The competency level was regressed on the subjects of curriculum. The achievements are attributable to a group of subjects focused on the skills for project development such as PPP, feasibility study, and project financing. Another group of subjects found to have significantly contributed to the improved competencies can be categorized as subjects focused on nurturing global perspectives. The paper shows it is possible to quantify the contribution of the program and the results provide a set of information that can be useful in designing and operating similar programs.

• The Korean Journal of Archival Studies
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• no.37
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• pp.3-39
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• 2013

The purpose of this study is to analyze the present stage of community archives movement in the UK. By doing so, it draws some implications of the UK case for the community archives movement in Korea. The UK's 'Independent' community archives as a part of grassroots movement are characterized by participation, autonomy, and self-help of community members. Along with the appearance of the concept of 'community', the UK has experienced the revitalization period of community archives in the social context of community-based urban regeneration project. Recently, the UK's community archives have transformed themselves into building a 'governance model' relying on the partnership with mainstream archives. In particular, the UK model of community archives is based 'on their own ways' with their autonomy as a product of intrinsic development initiated by communities themselves. The character of the model of this type is very analogous to the nature of maul' community archives movement in Korea. Since the early 2000s, however, the UK model of community archives has been evolving into a way of building governance through their appropriation of the skills and methodologies from mainstream archives without endangering the autonomous essences of community archives themselves. We need to note the point of local researchers' view in archival science who have tried to seek out the methodology for building maul community archives with regard to openness and collaboration. In this respect, a shift in archival principle in the UK would give significant implications in regenerating the locally based community model.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2005.05a
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• pp.535-540
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• 2005

In environmental impact assessment, noise impact assessment usually consists of three stages surveying the existing noise levels by measurements, predicting noise levels induced by construction works and predicting noise levels after the completion of project. When predicting noise level in urban area, this method does not consider acoustic phenomena like multi reflection, diffraction and absorption due to complex topographic configuration of building and terrains. For the purpose, a noise mapping tool is utilized to produce a series of noise maps, which are those for the present, for the works of construction and for the future. For accurate noise mapping, acoustical and topographic information is essential. Standard sound power levels and directivities of various construction equipments are required and scheduling of construction processes and locations of the equipments should be provided. In the case of exceeding legal limit, mitigation measures are applied to satisfy the legal limits and subsequent noise map is obtained and checked.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2007.05a
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• pp.57-58
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• 2007

Nowadays, the government, nongovernmental organizations, and educational institutions have come up with a variety of policies and objectives which are concerned about the importance of public design in the city. The project for integrated street environment in Sung-Nam at this time has started with the purpose to make the citizens' life safer and wealthier, and the purpose to improve the image of the nation. In the process of modernization, we must realize the overlooked problem(the thoughtless development for the environment and the threatening of the identity about the disagreed value and esthetic sense.) as our problem. We have focused on the suggestion of the road facilities suitable for urbanization which coincides with the quiet city and the global standards rather than pursuing the local growth and meaning. Based on the New Governance Design, we have presented the liberal design process which actively accepts the experts in a variety of fields. With the language of design, 'high-tech, self-restraint, and growth', we have made a homogeneous urban factor which is ideal for time and space.

• KIEAE Journal
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• v.15 no.3
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• pp.65-74
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• 2015

Purpose: This study is to propose a methodology for the formation of space according to the integration of structural concept and architectural concerns in the contemporary era. Beginning with researching on the theoretical fundamentals about surface-structure, it introduces several architectural examples to analyze its own structural form and spatial characteristics, and finally simulates a model for the formation of space through a real work. Method: The study is partially based on the Executive Architectural Project for 'Village of Spring' in Seocheon, which was planned in 2008 to suggest a strategic settlement layout for urban regeneration, and completed in 2012. Making architectural vocabularies permeated into surface-structure, throughout the design process of initially pursued concepts to the design development stage, we could encounter a new type of innovative space formation. It shows that the structure is one of most useful means for the realization of architectural concepts, and a design itself. Result: The expected result of the study intends to enhance the relationship between spatial formation and surface-structure, also ultimately to produce a structural system as 'space generator' to fulfill the social needs and its requirements.

• International Journal of High-Rise Buildings
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• v.5 no.3
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• pp.167-176
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• 2016

This paper describes a large tuned mass damper (TMD) developed as an effective seismic control device for an existing highrise building. To realize this system, two challenges needed to be overcome. One was how to support a huge mass that has to move in any direction, and the second was how to control mass displacement that reaches up to two meters. A simple pendulum mechanism with strong wires was adopted to solve the first problem. As a solution to the important latter problem, we developed a high-function oil damper with a unique hydraulic circuit. When the mass velocity reaches a certain value, which was predetermined by considering the permissible displacement, the damper automatically and drastically increases its damping coefficient and limits the mass velocity. This velocity limit function can effectively and stably control the mass displacement without any external power. This paper first examines the requirements of the TMD using a simple model and clarifies the constitution of the actual TMD system. Then the seismic upgrading project of an existing high-rise building is outlined, and the developed TMD system and the results of performance tests are described. Finally, control effects for design earthquakes are demonstrated through response analyses and construction progress is introduced.

• Proceedings of the Korean Geotechical Society Conference
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• 2007.09a
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• pp.90-104
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• 2007

The trend of current urban redevelopment and new city development project shows that the superstructure of building is getting larger and higher in consequence of a limited plottage condition and the preference of landmark. For this reason, it is definitely required to extend pile diameter and install the pilein deep foundation to support superstructure. The pile method causes construction-related problems such as increasing quantities, difficulty of storage & transportation material and decreasing design load while construct pile in deep foundation. The Bored Pile method has applied to minimize those problems. As above shown, this article will be presented construction case study of Barrette Pile and R.C.D in order to make a counterproposal for the quality control of a large building foundation work.

• Spatial Information Research
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• v.7 no.1
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• pp.13-27
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• 1999

This is a pilot study to develop an environmental information system, that is a compute. system for managing various urban environments data of S.M.C(Seoul Metropolitar City), and is also supporting the environmental policy decision-making for the city government. With 2 times of business analysis, the present status of environmental information management in S.M.C. and the major business processes and the data required to computerization were produced. As a result of this study, the model of S.E.I.S.(Seoul Environmental Information System) was developed, which includes the purpose of system, basic system components, and functions of subsystems. Finally a comprehensive strategy for developing the S.E.I.S which includes action plans and annual plans, organizaions for operation, and for project management was provided.