• Journal of the Economic Geographical Society of Korea
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• v.25 no.1
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• pp.171-181
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• 2022

The real estate price index plays key roles as quantitative data in real estate market analysis. International organizations including OECD publish the real estate price indexes by country, and the Korea Real Estate Board announces metropolitan-level and municipal-level indexes. However, when the index is set on the smaller spatial unit level than metropolitan and municipal-level, problems occur: missing values. As the spatial scope is narrowed down, there are cases where there are few or no transactions depending on the unit period, which lead index calculation difficult or even impossible. This study suggests a supervised learning-based machine learning model to compensate for missing values that may occur due to no transaction in a specific range and period. The models proposed in our research verify the accuracy of predicting the existing values and missing values.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.42 no.4
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• pp.591-597
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• 2022

As social anxiety is increasing due to the spread of the COVID-19 epidemic, the responses at the level of local governments are also changing depending on the characteristics. We analyzed the factors influencing perceptions of social safety as they relate to the trustworthiness of local governments. Based on a 2020 social survey of 16 cities, counties, and districts in Busan Metropolitan City, the effects of householder characteristics, economic characteristics, local attachment characteristics, and social safety perception characteristics on the reliability of the local government were analyzed through an ordinal logistic regression analysis. It was found that the more vulnerable the class was and the safer the region was, the higher the trust was in the basic local government. In order to respond and preemptively recover damage in natural and social disaster situations, continuous efforts are needed to strengthen the capabilities of basic local governments.

• 한국노년학
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• v.41 no.4
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• pp.469-490
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• 2021

This study examined the effect of family cohesion and perception of age-friendly environment on sense of community and the mediating role of perception of age-integration in those relationships by regions. To that end, we used survey data collected from a nation-wide survey from adults who are aged 20 to 85 (N=1,200). ANOVA, structural equation models and bootstrapping mediation tests were conducted. The results showed that family cohesion and one sub-dimension of the age-friendly environment- social participation- increased sense of community in all three regions. Also, perception of age-integration partially mediated the relationship between family cohesion and sense of community in the Metropolitan areas and small cities as well as the relationship between social participation and sense of community in all three regions. Based on the results, authors discussed ways to increase family cohesion and social participation to enhance sense of community.

• Journal of the Korean Geotechnical Society
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• v.38 no.7
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• pp.39-47
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• 2022

This study aims at evaluating the stability of disaster risks, such as schools, apartments, and geotechnical structures located around slopes in urban areas. The research conducted an aerial photography analysis on where the slope of the retaining wall behind 𐩒𐩒 High School in Gwangju collapsed in August 2018 due to heavy rain. In general, the overflow of rainwater has been managed through drainage channels around slopes during the rainy season, and the surface flow of rainfall was limited due to the presence of dense forests in the area. However, when the slope collapsed, a lot of water flowed out of the ground, and the saturated surface layer ground was destroyed. To analyze the cause, the changed terrain of the upper slope area, which could not be directly identified, was photographed using unmanned aerial vehicles. Digital Elevation Model by unmanned aerial vehicle shooting was performed by analyzing the slope map, calculating the direction of rainfall and the length and width of water-logged areas. The change in the instability of the slope over time due to a 10-day rainfall was also analyzed through numerical analysis.

• Journal of the Korea Convergence Society
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• v.13 no.2
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• pp.331-340
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• 2022

A descriptive study was attempted to identify the factors affecting of nursing organization culture, communication competence, and professionalism on nursing service quality of small and medium-sized hospital nurses. The study were 166 nurses from hospital nurses located in G metropolitan city, and the data collection period was from August 22 to August 30, 2019. Data were analyzed PASW 18.0 program. As a result, the factors affecting on nursing service quality were professionalism(𝛽=.485, p<.001), communication competence(𝛽=.354, p<.001), hierarchy-oriented organization culture(𝛽=.154, p<.01). The adequacy of the multiple regression model was very significant at the F statistic 64.75(p<.001), explanatory power of 54.6%. Based on this study, it can be useful as basic data for exploring ways to improve nursing service quality and developing nursing intervention programs.

• Journal of the Korea Society of Computer and Information
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• v.14 no.12
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• pp.209-216
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• 2009

The employees in social welfare institutions have an importance of learning due to jop specialty more than any one else. That is because there are a variety of increasing needs in social welfare services and customer-oriented welfare services. On the basis of that, this study shows how learning orientation theories as a new organization management strategy affects the employees in social welfare institutions. It shows cause and effect relation by establishing hypothesis model based on the preceding researches. It performed empirical analysis on the employees in social welfare institutions in G metropolitan city. As a result, the hypothesis was tested that learning flow, vision sharing, openness have significant effects on member's jop satisfaction. It implies that job satisfaction can be improved, if the level of learning flow, vision sharing, openness of the employees in social welfare institutions are promoted.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.29 no.6D
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• pp.663-673
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• 2009

Driver's perceived curve radius is different from actual curve radius at curve sections. This is called visual distortion. It has effect on operation speed according to driver's perception and finally bad effect on safety at curve sections. At present, however, there is no research on quantitatively analysis of visual distortion and no criteria for curve section design considering the visual distortion. Therefore, this study focus on finding degree of visual distortion and suggesting design criteria by visual distortion analysis. The process of this study is as below; First, a calculaiton model of perceived curve radius was developed by survey using computer simulation. In this model, a dependent variable is perceived curve radius and an independent variable is geometric factors. Second, degree of visual distortion was calculated from ratio of perceived curve radius to actual curve radius. Finally, design criteria were suggested through influencing factor analysis of visual distortion at curve sections.

• Korean Journal of Social Welfare Studies
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• v.41 no.1
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• pp.281-306
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• 2010

The purpose of this study is to look for the factors that facilitate knowledge sharing among public official in the department of social welfare, and to find whether the intention to share knowledge influences the knowledge sharing. In order to accomplish the purpose of the research model, the independent variables were trust, openness in communication, anticipated reciprocal relationship, and efficacy. The intervening variable was intention to share knowledge, and the dependent variable was knowledge sharing. The significant finding that came out of this research model is that trust, anticipated reciprocal relationship and efficacy positively influenced the intention to share knowledge. Efficacy positively affected knowledge sharing. Intention to share knowledge had a significant influence on the knowledge sharing. According to the results of this study, in order to improve effective knowledge sharing in the public sector or in the private sector, we suggested that social workers have to consider why they should share knowledge in the social welfare organization. Social workers in the public sector or in the private sector must develop ways to share the knowledge possessed within the organization with the people who need that knowledge.

• Journal of the Korean Association of Geographic Information Studies
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• v.14 no.4
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• pp.102-115
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• 2011

The purpose of this study is to establish the evaluation model through the systematic process of selecting the indicators and to evaluate the environmental-control function on forest using GIS in Deagu for the sustainable forest planning. The 35 indicators as basic items were selected by literature review and those were squeezed into the 29 indicators through expert brainstorming. Also, the 8 indicators to evaluate environmental-control function were selected by the first survey and the 5 final indicators such as carbon sink, temperature decrease, wind formation, water circulation, air purification were determined by MCB analysis using the second survey. The evaluation model was established through the weight of each indicator by AHP analysis using the third survey. According to the result of evaluating the environmental-control function on forest, the functions around the top area of Mt. Ap, Mt. Biseul, Mt. Palgong had more than 66 scores. On the other hand, the functions around Mt. Waryong and forest of Chilgok in Buk-gu had less than 40 scores. It is necessary to improve the function through the sustainable restoration and management in case of forest that the environmental-control function was lower. Furthermore, these results will be able to be utilized as basic data in order to establish the preservation area and control development area at the urban, environmental, and forest planning.

• Journal of Digital Convergence
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• v.18 no.6
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• pp.197-208
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• 2020

Social enterprises are entities to pursue solving societal problems with maintaining commercial viability. In order for a social enterprise to achieve commercial viability, it must be able to provide products that consumers can satisfy, to make social enterprise trustable, and to establish a lasting relationship with customers. This study suggests that perception of value congruence, price fairness and service quality will affect customer performance such as trust, satisfaction and customer loyalty. And this structural relationship was confirmed through structural equation modelling. The empirical results show that customer trust and satisfaction can be improved when the value congruence is high and service quality is high. Meanwhile, the perception of price fairness has a negative effect on customer trust. However, considering the influence of price fairness on customer satisfaction, the total effect of price fairness on trust is not significant. This result implies that customers are less sensitive to social enterprise product prices than general companies. And customer satisfaction for the social enterprise is positively affecting trust and loyalty, and customer trust is also positively affecting customer loyalty. After the empirical analysis, this study suggests implications for social enterprises to improve customer performance and secure commercial viability.