• 한국노년학
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• v.32 no.3
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• pp.851-867
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• 2012

The purpose of this study was to identify the caregiving reward of grandmothers raising their infant grandchildren and to examine factors influencing rewards in double-earner households. Data were collected from 323 grandmothers raising infant grandchildren who are under 6 years of age in double-earner households in Seoul, Gyeonggi-do and six metropolitan cities. According to the hierarchy multiple regression analysis, grandmothers' caregiving reward was found to be significantly high. It was also appeared that main factors of the rewards of grandmother were grandparents meaning, relationship with adult children and economic level. This study implies that improving grandparents meaning, relationship with adult children, and economic support may be a strategy to enhance the reward of grandmothers raising infant grandchildren. These findings suggest that there is a need to provide intervention and welfare policy for elderly caregiver.

• Journal of Family Relations
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• v.21 no.1
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• pp.123-141
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• 2016

Objective: This study examined correlates of residential proximity between parents and non-coresident married children. A majority of existing studies on intergenerational living arrangement has focused on exploring factors that are associated with intergenerational coresidence only, despite an increasing number of parents and children who do not live together but close by. Because residential proximity facilitates frequent contacts and support exchanges between the two generations, it is important to understand its correlates. Method: The data were drawn from first wave of the Korean Longitudinal Study of Ageing (KLoSA, 2006), a nationally representative sample of adults 45 years or older and their spouses. The analytic sample consisted of 3,950 parents with 10,946 non-coresident married children. Both regression with robust standard errors and sibling fixed effects regression models were estimated using the reg and xtreg procedures in STATA. Results: Younger, less depressed, and more physically impaired parents lived closer to at least one of their married children (within a 30-minute distance by public transportation). Fathers (compared to mothers), parents living in cities (compared to those living in rural areas), parents with at least one co-resident child or fewer numbers of married children tended to have at least one married child living nearby. With regard to child characteristics, married children who were less educated, homeowners, and had more children lived closer to their parents. Also, sons (compared to daughters) lived in closer distance to their parents. Conclusion: Overall, findings suggest that intergenerational residential proximity may primarily be motivated by the childcare needs of married children or parents' needs for assistance with functional impairment. Also, the traditional patrilineal norms of intergenerational support may still be a critical factor in residential decisions as observed in the difference between married sons and daughters in proximity to their parents.

• Journal of Platform Technology
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• v.8 no.4
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• pp.59-69
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• 2020

Recently, the seriousness of ultrafine dust and fine dust has emerged as a national disaster, but small and medium-sized cities in provincial areas lack fine dust monitoring stations compared to their area, making it difficult to manage fine dust. Although the computing resources for collecting and processing fine dust data are not large, it is necessary to utilize cloud and private and public data to share data. In this paper, we proposed a small edge computing system that can measure fine dust, ultrafine dust and temperature and humidity and process it to provide real-time control of fine dust and service to the public. Collecting fine dust data and using public and private data to service fine dust ratings is efficient to handle with edge computing using raspberry pie because the amount of data is not large and the processing load is not large. For the experiment, the experiment system was constructed using three sensors, raspberry pie and Thinkspeak, and the fine dust measurement was conducted in northern part of kyongbuk region. The results of the experiment confirmed the measured fine dust measurement results over time based on the GIS data of the private sector.

• Journal of Convergence for Information Technology
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• v.11 no.6
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• pp.73-82
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• 2021

This study was conducted to identify factors influencinging confidence in performing patient safety management (PSM) of nursing students. The subjects of this study were 230 nursing students in four universities in two cities. Data were collected between June 22 and June 26, 2020 using by completing structured self report questionnaires. Data were analyzed using SPSS/WIN 21.0. programs. In correlation analysis, significant positive correlations were found between confidence in performing PSM, PSM knowledge(r=.321, p<.001), PSM attitude(r=.584, p<.001), and clinical decision making ability(𝛽=.460, p<.001). In multiple regression analysis, PSM attitude(𝛽=.35, p=.005) and clinical decision making ability(𝛽=.23, p<.001) were factors predicting confidence in performing PSM, which explained 34.2% of the variance in the model. Therefore, we emphasize that continuing customized convergence educational programs are required to improve nursing student's confidence in performing PSM.

• Particle and aerosol research
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• v.17 no.1
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• pp.9-20
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• 2021

As a large city advanced, the urban environment is becoming an issue. The contribution of vehicle emissions in air pollutants was very high according to the clean air policy support system (CAPSS). In order to improve the air quality in large cities, it is necessary to establish improvement measures by sources, analyzing the air quality of roadside. We divided Bucheon city into 4 regions to investigate the roadside pollutants of each district using the mobile laboratory (ML) and air quality monitoring station (AQMS). ML was used to measure pollutants emitted from vehicles and AQMS data was used as a comparison group of ML data. As a measurement result of pollutants in the roadside, the concentration of air pollutants in industrial & engineering complex area was the highest and concentration of air pollutants in residential & forest complex area was lower. By street, Bucheon-ro, Sinheung-ro, Sosa-ro, and Gyeongin-ro were identified as high concentrations. Therefore, further researches on preparing management measures for roads in the hot-spot area are needed.

• Journal of the Korean Society for information Management
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• v.38 no.1
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• pp.143-168
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• 2021

In most countries, public libraries play a role as a knowledge and information hub for local communities, a complex cultural space, and a third place for meetings and communication. Among the work of public libraries for this purpose, the key point is systematic collection development, and the established collection is essential for all knowledge and information services. In particular, local representative libraries must perform legal duties as a comprehensive knowledge information center for metropolitan governments, and develop, preserve, and service specialized collections that are difficult for other public libraries. Therefore, we analyzed the development cases of specialized collections of public libraries in large cities in foreign countries and local representative libraries in Korea, surveyed the degree of awareness of specialized collections for employees of public libraries and the cultural to geography in Gyeongbuk region. Based on the background information, this study proposed the development plan and establishment strategy of the Gyeongbuk Library specialized collection, which was named "Gyeongbuk Knowledge and Cultural Heritage."

• Journal of the Korean Applied Science and Technology
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• v.38 no.3
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• pp.708-719
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• 2021

The purpose of this study was to investigate the effect of the major satisfaction and parents' career support on the behavior of career preparation among university students and to presents basic data for making active the behavior of career preparation. A survey was held to the university students in Seoul and Chungcheong cities from April 15 to May 14, 2021 195 copies were in the final analysis for data analysis, t-test, ANOVA, Pearson's Correlation Coefficient and Multiple regression was used. As a result, the factors of affecting on the behavior of career preparation were followed by Economic level, Major category, Motivation of the major, Grade, the major satisfaction and parents' career support. The multiple regression explanatory power was 50.5percent of the total changes in the behavior of career preparation. Therefore, this study could be used as a basic data for the development of education programs through increase the major satisfacton and enhance parents career support in order to the active behavior of career preparation.

• Journal of the Korean Recycled Construction Resources Institute
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• v.8 no.4
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• pp.436-443
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• 2020

In this paper, we tried to examine the composition ratio of plastic waste from households according to the generated city and the qualities according to the production time of material recycling products. As a result, the composition ratio of recyclable plastic waste among the total plastic waste according to the generated cities is 64.5~90.4%, showing a big difference by city. In addition, the quality evaluation of material recycling products by production time for four months showed that the average tensile strength was 12.33MPa, the average elongation rate was 5.94%, the average density was 1.35g/㎤ and the average ash content was 3.66%.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.48 no.12
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• pp.1021-1031
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• 2020

With the advent of industry 4.0 technologies like the artificial intelligence and the autonomous flight, 'Urban Air Mobility (UAM)' is being considered as an effective alternative to resolve the ground urban traffic congestion. Accordingly, many companies in the world including Korea are investigating on the development of UAM vehicles and operation systems. In this study, after identifying and classifying the essential elements of the UAM operation, the UAM system operational concept has been derived, then detailed analyses for each element has been performed. Based on the conceptual analysis of the UAM operation system, UAM flight routes in Seoul and Gyeong-In area have been established and confirmed to be operable through the performance analysis of UAM vehicles. The flight route analysis in this study is expected to be applied to UAM flight routes establishment in various cities in the future.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.44 no.1
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• pp.26-36
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• 2021

The topic of this study is the field of humanitarian logistics for disaster response. Many existing studies have revealed that compliance with the golden time in response to a disaster determines the success or failure of relief activities, and logistics costs account for 80% of the disaster response cost. Besides, the agility, responsiveness, and effectiveness of the humanitarian logistics system are emphasized in consideration of the disaster situation's characteristics, such as the urgency of life-saving and rapid environmental changes. In other words, they emphasize the importance of logistics activities in disaster response, which includes the effective and efficient distribution of relief supplies. This study proposes a mathematical model for establishing a transport plan to distribute relief supplies in a disaster situation. To determine vehicles' route and the amount of relief for cities suffering a disaster, it mainly considers the urgency, effectiveness (restoration rate), and uncertainty in the logistics system. The model is initially developed as a mixed-integer nonlinear programming (MINLP) model containing some nonlinear functions and transform into a Mixed-integer linear programming (MILP) model using a logarithmic transformation and piecewise linear approximation method. Furthermore, a minimax problem is suggested to search for breakpoints and slopes to define a piecewise linear function that minimizes the linear approximation error. A numerical experiment is performed to verify the MILP model, and linear approximation error is also analyzed in the experiment.