• Journal of Korean Society on Water Environment
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• v.26 no.4
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• pp.654-663
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• 2010

Attention has increasingly focused on the pollutant load discharged from rural area since the enforcement of total maximum daily loads (TMDLs) in korea. As one of the methods to control the inflow of pollutant load during wet weather events, local governments are attempting to apply non-point source control facility. To design those facilities appropriately, it is essential to understand the runoff characteristics of pollutants such as TSS, $BOD_5$, $COD_{Cr}$, TP and TN. In the paper, the quantitative analyses for pollutant runoff characteristics were examined in a small rural watershed with the area of about 53 hectares. For a dry weather day and wet weather events, variation patterns of dry weather flow and runoff characteristics of wet weather flows were monitored and investigated. The runoff model using XP-SWMM reflecting the landuse types of the watershed in detail was simulated to perform the sensitivity analyses for several factors influencing on their hydrograph and pollutographs. As a result, for the case of medium and small rainfall events (i. e. total rainfall of 35.8 and 17.5 mm), the impervious area including green house, roof and road which covers relatively low portion of total area (i. e. 16%) caused substantial first flush and the majority of total runoff load. Therefore, it has been concluded that the runoff characteristics of each pollutant and distribution of impervious area should be considered for the establishment of the control strategy of non-point pollutant runoff at a rural area.

• Journal of the Korean housing association
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• v.15 no.3
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• pp.43-51
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• 2004

The purpose of this study is to examine the physical characteristics of the detached housing area in the housing site development district. The process of this study is to investigate the characteristics of the physical structure and the building use, then to analyze the relationship of physical structure and the building use in the aspect of the morphological characteristics. The case study focuses on the Chil-kok2, An-Siml in Taegu. The streets pattern is composited gird and loop type mixed. The block is composited by 2 lots in general. But the obscurity of organization and character of the streets, the size and shape of lots which is not fit to the building use. A whole residential characters appears high residential density ratio. so residential environment became worse. The improving level of residential environment and efficiency of land use in the detached housing area of the housing site development district, firstly the propriety of the physical structure must be considered about detached house characters, and the housing uses which fit to the physical structure are needed, and also for the concrete realization of this, the designation of district, the zoning of residential area, the guideline of the district design, and establishment of comprehensive master planning in detached housing area are needed in aspect of the housing policy. As the result of this study, it suggests several design guideline to improve housing site development.

• Proceedings of KOSOMES biannual meeting
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• 2007.05a
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• pp.51-56
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• 2007

It has generally used the burial method for the protection methods of submarine cable. Especially in Korea, It has used the protection methods of various types according to fisheries and fishing implements. Present day, All the protection methods-burial, continuous concrete mattress, cast iron pipes, U-duct, concrete bags, Rock Berm, mortar bags, FCM apply to the submarine cable, but these methods just focus on the safety of submarine cable against the external damages not the characteristics of ocean environment and the protection of environment. This research is going to present the protection methods of submarine cable according as the characteristics of ocean environment-external damages, depth of water, seabed condition, wave power and the protection of environment.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.32 no.2
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• pp.140-146
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• 2009

Since the computer technology has been drastically developed and broadly employed for the design of human machine system, human system interface was somehow digitalized. Actually the operator's working environment employing the digital devices are not be fully digitalized due to its technical constraints so that it has been changed to the hybrid environment which has a combination of digital and analog elements. The hybrid environments need to study its characteristics and the guidelines for the proper design and evaluation purpose. This paper describes the human factor design elements of the console operated under hybrid environment through studying the characteristics of digital and analog environment based on the related human factor guidelines and literatures. The result of this paper implies the contribution to the evaluation of the generic human working environment which digital and analog elements are jointly used.

• Korean Journal of Human Ecology
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• v.8 no.1
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• pp.15-27
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• 1999

This study investigated characteristics of H.T.P test responses according to home environment variables. The subjects were 183 children in the fifth grade at an elementary school in Taejon. SAS was utilized in order to analyze data using x2 technique. The result of the study were as follows. The more home environment stimuli the children were provided by parents, the more stable in emotion they were. Especially four out of six home environment variables were found significant in helping children become emotionally stable, confident, well-adjusted, and high in achievement. These four variables were language stimulus, social maturity educational resources, and housing environment. It is concluded that children used to be provided with good home environment including language stimulus, social maturity, educational resource, housing environment, and plenty of family activities in order to become emotionally stable, confident, high in achievement, and adjustment.

• Nuclear Engineering and Technology
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• v.55 no.2
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• pp.566-574
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• 2023

Investigating the seepage characteristics of the leaching solution in the ore-bearing layer during the in situ leaching process can be useful for designing the process parameters for the uranium mining well. We prepared leaching solutions of four different viscosities and conducted experiments using a self-developed multifunctional uranium ore seepage test device. The effects of different viscosities of leaching solutions on the seepage characteristics of uranium-bearing sandstones were examined using seepage mechanics, physicochemical seepage theory, and dissolution erosion mechanism. Results indicated that while the seepage characteristics of various viscosities of leaching solutions were the same in rock samples with similar internal pore architectures, there were regular differences between the saturated and the unsaturated stages. In addition, the time required for the specimen to reach saturation varied with the viscosity of the leaching solution. The higher the viscosity of the solution, the slower the seepage flow from the unsaturated stage to the saturated stage. Furthermore, during the saturation stage, the seepage pressure of a leaching solution with a high viscosity was greater than that of a leaching solution with a low viscosity. However, the permeability coefficient of the high viscosity leaching solution was less than that of a low viscosity leaching solution.

• Journal of the Korean housing association
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• v.18 no.2
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• pp.93-103
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• 2007

This study examined the awareness of the middle aged about the digital home system and well-being apartment design elements in order to suggest the design guidelines for planning of the elderly housing environment. By literature review, the concept and characteristics of the digital home system and well-being Apartment design elements were summarized the degree of satisfaction and preference of middle aged for these characteristics were investigated and analyzed. For this study, a questionnaire survey of 156 housewives living in apartment complex of Busan was carried out. The results of this study are as follows: The middle aged were generally short of recognition for digital skill and service, and also they showed positive evaluations to a few useful items of digital home system. These items belong under safety security system and interior environment control system and provided for convenient & comfortable life. Accordingly, satisfied digital home system can apply basic design element for housing for elderly. Whereas, the middle-aged were not satisfied with housework help system and cultural life system because items of these systems were not various and complicate to us. So, for the improvement of not satisfied digital home system, we needed development of digital contents and marketing & management for high accessibility and easy useability. The middle aged will concern about health & environment friendly continuously and become to stay long in their housing as the characteristics of elderly. So, It is necessary to be considered well-being apartment design elements of health & environment friendly very actively and lastingly in elderly housing environment design. Also, the awareness of middle aged for digital home system and well-being apartment design elements varied according to the background characteristics. This suggests housing environment for elderly life is considered differently as various background characteristics of middle aged.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.23 no.5
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• pp.1-14
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• 2020

In order to improve the urban thermal environment, efforts are being made to increase green areas in cities that include park construction, planting, and green roofing. Among these efforts, urban parks play an important role not only in improving the urban thermal environment, but also in terms of ecosystem services (serving as resting places for citizens, providing cleaner air quality, reducing noise, etc.). Therefore, the purpose of this study is to suggest planning and management guidelines for urban parks that are effective in improving the thermal environment, by analyzing the urban surface temperature reduction performance of urban parks. To do this, first, land surface temperature was calculated by using Landsat 8 images. Second, the PCI (Park Cool Island) index was calculated to identify the temperature reduction performance of urban parks. Third, the characteristics of parks (area, shape, vegetation) and the surrounding spatial characteristics (land cover, building-related variables, etc.) were identified. Finally, the relationship between the PCI indices (PCI scale, PCI effect, PCI intensity) and the characteristics of the parks and their surroundings were analyzed. The results revealed that the parks consisting of a larger area, simple shape, and higher tree coverage ratio had increased PCI performance, and were advantageous for improving the urban thermal environment. Meanwhile, PCI performance was found to have decreased in areas with a higher impermeable area ratio and building coverage ratio. The outcomes of this study can be used to identify priority areas for planning and management of urban parks and can also be utilized as planning and management guidelines for improving urban thermal environment.

• Structural Engineering and Mechanics
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• v.50 no.1
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• pp.73-88
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• 2014

Vibration characteristics of columns are influenced by their axial loads. Numerous methods have been developed to quantify axial load and deformation in individual columns based on their natural frequencies. However, these methods cannot be applied to columns in a structural framing system as the natural frequency is a global parameter of the entire framing system. This paper presents an innovative method to quantify axial deformations of columns in a structural framing system using its vibration characteristics, incorporating the influence of load tributary areas, boundary conditions and load migration among the columns.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2008.05a
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• pp.196-202
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• 2008

The interest in natural environment as a new living culture is turning to the programs that give us direct experience rather than indirect one. This change demands new sort of analysis on space in order to design hotel lobby space which satisfies contemporarians' emotion. Hereupon, this article has its purpose of studying the characteristics of environment-friendly expression as a means to approach to the space design of hotel lobby space in which men and nature can coexist and men can be richer in their emotion. Moreover, through the flow and types of environment-friendly design, this study intends to emphasize the importance of introducing natural factors and suggest the possibility of diversification in environment-friendly expression.