• Proceedings of the Korea Water Resources Association Conference
• /
• 2015.05a
• /
• pp.397-397
• /
• 2015

The frequency of urban floods is recently increased as a consequence of climate change and haphazard development in urban area. To mitigate and prevent the flood damage, we generally utilized a numerical model to investigate the causes and risk of urban flood. Contrary to general flood inundation model simulating only the surface flow, the model needs to consider flow of the sewer network system like SWMM and ILLUDAS. However, this kind of model can not consider the interaction between the surface flow and drainage network. Therefore, we tried to evaluate the impact of bidirectional interaction between sewer and surface flow in urban flooding analysis based on simulations using the quasi-interacted model and the interacted model. As a general quasi-interacted model, SWMM5 and FLUMEN are utilized to analyze the flow of drainage network and simulate the inundation area, respectively. Then, FLO-2D is introduced to consider the interaction between the surface flow and sewer system. The two method applied to the biggest flood event occurred in July 2011 in Sadang area, South Korea. Based on the comparison with observation data, we confirmed that the model considering the interaction the sewer network and surface flow, showed a good agreement than the quasi-interacted model.

• Asian Journal for Public Opinion Research
• /
• v.3 no.2
• /
• pp.84-105
• /
• 2016

The instability of social norms on the Internet causes the diversity of social identification. Meanwhile, the anonymity of online social identity and the chaos of the role-playing among the interacting participants cause an ambiguity of identity recognition, which intensifies anxiety about interpersonal interaction. Methods that promote face-to-face interpersonal interaction through the reconstruction of the identification to the social system and intergroup trust is worth further research. Based on a telephone survey of urban residents in thirty-six cities in China (N=1080), the study focuses on the influence of Internet use on interpersonal interaction of urban residents and the mediation effect of social identification. The results show that Internet use has a negative effect on the interpersonal interactions of urban residents, and social identification plays a mediating effect between Internet use and interpersonal interaction. Implications of the results are discussed.

• Korean Journal of Human Ecology
• /
• v.1 no.2
• /
• pp.23-36
• /
• 1998

The purpose of this study was to investigate consumer competencies of urban wives an variables on it. The framework of this study was consumer socialization theory. The results were as follows; 1. There were significant differences in competencies of urban wives according to employment status, interaction with family members, interaction with peers and frequency of media exposure. 2. Employment status, interaction with family members and frequency of media exposure were independent influencing factors on consumer competencies of urban wives. 3. Reviewing a causal model, the results were as follows. Employment status, interaction with family members and frequency of media exposure had an effect on consumer competencies of urban wives directly. (Korean J Human Ecology 1(2):23～30, 1998)

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.29 no.2D
• /
• pp.267-273
• /
• 2009

To predict the urban growth trend and to prevent the metropolitan problems, it is important to track the spatio-temporal changes in the urban spatial structure. Commuting is inevitable and regular activities emerging in the metropolitan region. Therefore, it can be a useful to examine the interregional interaction and the urban spatial change. The purpose of this study is to investigate the urban interaction between Seoul and cities around Seoul Metropolitan Region, and GIS functions helped analysis and visualized results. An analysis of current commuting data using the Gravity Model suggests that the interaction between Seoul and its peripheral cities has been intensified from 1990 to 2000 and that the urban interaction was closely related to the distance. And the southward distribution of the cities having a strong interaction with Seoul accounts for the imbalance in growing of Seoul Metropolitan Region.

• Journal of the Korean association of regional geographers
• /
• v.20 no.1
• /
• pp.30-48
• /
• 2014

Relying on the interaction indices - dominance index, relative strength index and entropy index, this paper analyzes the structural features of urban network in the Seoul metropolitan area with the flows of commuting, business, and freight. Analytical results show that the Seoul metropolitan urban system is vertical, size-dependent, one-way, and the highest city-dominant network rather than horizontal, size-neutral, two-way, complementary one. The network of freight flow is a little bit more symmetrical than the networks of commuting and business. However, the interaction with Seoul is still determinant in all aspects of hierarchical structure, relative strength, and symmetry of flow.

• Earthquakes and Structures
• /
• v.13 no.6
• /
• pp.573-588
• /
• 2017

The earthquake input is required when the soil-structure interaction (SSI) analysis is performed by the direct finite element method. In this paper, the earthquake is considered as the obliquely incident plane body wave arising from the truncated linearly elastic layered half space. An earthquake input method is developed for the time-domain three-dimensional SSI analysis. It consists of a new site response analysis method for free field and the viscous-spring artificial boundary condition for scattered field. The proposed earthquake input method can be implemented in the process of building finite element model of commercial software. It can result in the highly accurate solution by using a relatively small SSI model. The initial condition is considered for the nonlinear SSI analysis. The Daikai subway station is analyzed as an example. The effectiveness of the proposed earthquake input method is verified. The effect of the obliquely incident earthquake is studied.

• Journal of the Korean Home Economics Association
• /
• v.30 no.3
• /
• pp.223-239
• /
• 1992

The purpose of this study is to classify the home management behaviors of urban housewives and to find out variables which influence them. Following are the results. 1. The home management behavior of urban housewives are classified into six types. Thouse expense and convenience oriented type, using the information and family centered type, tradition and steady oriented type, improving life type, conservative and thrifty type and the self-faithfulness and change adaption type. 2. Follows are the variables which have influenced on home management behaviors of urban housewives. \circled1 The level of education of housewives, perceived level of economical resources, income and evaluation level of life have influenced on expense and convenience oriented type. \circled2 The duration of marriage, the level of education of husband, the satisfaction of housework and communication interaction have influenced on using the information and family centered type. \circled3 The satisfaction of housework, the perceived level of economical resources, the level of education of husband and the age of housewives have influenced on the tradition and steady oriented type. \circled4 The perceived level of family resources and the communication interaction have influenced on the improving life type. \circled5 The communication interaction and the income have influenced on conservative and thrifty type. \circled6 The perceived level of economical resources, the satisfication of housework, the communication interaction, the level of education of housewives, the age of housewives and the number of children have influenced on the self-faithfulness and change-adaption type.

• Journal of the Korean Regional Science Association
• /
• v.10 no.2
• /
• pp.61-71
• /
• 1994

Despite of being the criteria to choose the efficient and reasonable alternatioves inactual planning process, the measure of accessibility rarely has applied to practices because each model has unexplicity concept of it and limitations in itself. Accessibility implies transportation system which offers opportunity of movement to overcome spatial separation and, simultaneously, land-use system which represents the location of each activity. Therefore, measures of accessibility have to represent the attractiveness of locations and the interactions of activities, that is, land-use and transportation, with an index. Considering that urban activity is based on the economic efficiency, costs and benfits, accessibility means the economic efficiency of the location of activity and the travel in view of land-use and transport repectively. Combined models that measure accessibility with considering land-use and tranportation simultaneously depend on reasonable concepts, but it is too simple for them to explain the accessibility which resulted from complex interaction of urban activities. Combined urban activity model developed by Kim (1983) and Rho (1989) explains the characteristics of activities in each regions and urban strcture in economic general equilibrium states in the long term of urban system. This model measures a regional accessibility with a dual variable which means the location surplus. This is a more systematic and comprehensive model for calculating the regional accessibility because it considers the interaction of each activity in urban system. It needs efforts to apply the accessibility index as a criterion in actual planning process through finding and quantitification of other explanatory variables to measure it in combined urban activity model.

• Journal of Industrial Technology
• /
• v.7
• /
• pp.3-7
• /
• 1987

The Urban park plays a significant role as an ideal space for residents. In this sense, Seoul city established a criterion for urban park system according to the park size per person in each district of Seoul. However, that criterion tends not to meet the residents behavioral patterns and interaction dynamics between districts. The objective of this study is to establish the demand forecasting of urban park in Seoul. The result of this study shows that the priority of designating park area is changed greatly when interaction dynamics between districts is taken into account.

• Journal of Korea Water Resources Association
• /
• v.41 no.9
• /
• pp.919-927
• /
• 2008

Flow exchanges between stream and groundwater are assessed on urban streams in Daegu, Korea. Two rivers and 25 streams with the total length of 240 km run through the study area. The interaction between surface water and groundwater was estimated using Darcy's method. The study was conducted by dividing the basin into 16 smaller watersheds, and for comparison purposes. Groundwater level, surface water level, hydraulic conductivity, thickness of aquifer, and the distance between the well and the nearest stream were used for quantifying the interaction. To investigations the groundwater interaction in the watersheds, the amount of effluent seepage from groundwater to the stream, the amount of influent seepage from the stream to groundwater, and the amount of annual interaction between surface water and groundwater were computed. The total amount of effluent seepage from the groundwater to stream in the basin was approximately $72{\times}10^6m^3/year$. The total amount of influent seepage from the stream to groundwater was approximately $35{\times}10^6m^3/year$. It appeared that the total amount of annual interaction between surface water and groundwater was approximately $108{\times}10^6m^3/year$ and the total groundwater flow balance was approximately $37{\times}10^6m^3/year$. The annual amount of interaction between the surface water and groundwater was the largest in the Goryung Bridge Basin($29{\times}10^6m^3/year$) and the least in the Dalchang Dam Basin($0.2{\times}10^6m^3/year$). The results show that flow exchanges between stream and groundwater are very active and that there are significant difference among the smaller watersheds. Finally, the results indicate that it is necessary to further investigate to more precisely understand the interaction characteristics between surface water and groundwater in urban areas.