• Korean Journal of Social Welfare
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• v.69 no.3
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• pp.97-119
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• 2017

There has been no studies that compare services of residential care centers, group homes, and foster homes although out-of-home care services differ from each other depending on the types of out-of-home care. This study compared care satisfaction of 481 children in residential care centers, group homes, and foster homes for five years. Futhermore, factors that predict care satisfaction of the children were identified using multi-level modeling analyses. As results, this study found that care satisfaction of children in group homes was the higher than that in foster homes and residential care centers. In addition, self-esteem, social support, and types of out-of-home services were identified as significant predictors of changes in care satisfaction. Based on the study results, suggestions to help children adapt to out-of-home care and improve out-of-home care satisfaction were made.

• The KIPS Transactions:PartD
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• v.13D no.3 s.106
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• pp.325-336
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• 2006

For supporting LBS service, recent studies on spatial network databases (SNDB) have been done actively. In order to gain good performance on query processing in SNDB, we, in this paper. design efficient storage and index structures for spatial network data, point of interests (POIs), and moving objects on spatial networks. First, we design a spatial network file organization for maintaining the spatial network data itself consisting of both node and edges. Secondly, we design a POI storage and index structure which is used for gaining fast accesses to POIs, like restaurant, hotel, and gas station. Thirdly, we design a signature-based storage and index structure for efficiently maintaining past, current, and expected future trajectory information of moving objects. Finally, we show that the storage and index structures designed in this paper outperform the existing storage structures for spatial networks as well as the conventional trajectory index structures for moving objects.

• 한국노년학
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• v.40 no.1
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• pp.91-109
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• 2020

This study aims to investigate the interdependence of Korean middle and old-aged couples in the association between exercise and life satisfaction through grip strength trajectory. Data were drawn from the nationally representative Korea Longitudinal Study of Aging (KLoSA) collected from 2006 to 2016. The sample included couples over 45 years of age in the first wave and participated in all six waves of the survey (Ncouple=1,997). There were three steps for analyses: correlation, parallel latent growth curve model, tests of indirect effects of the mediation paths. Covariates included in the models were husbands and wives' characteristics (age, education, work status, chronic diseases, marital satisfaction, contact frequency with friends or neighbors) and couple's household income. Results showed husbands' and wives' life satisfaction and grip strength were interdependent upon each other. Also, exercise participation of both husbands and wives was associated with both husbands' and wives' life satisfaction via the initial level of grip strength of husbands. Moreover, exercise participation of only husbands was associated with wives' life satisfaction through the initial grip strength of husbands. These results suggest the aging processes of middle and old-aged couples need to be understood in the context of gender dynamics and couple interdependence.

• Korean Journal of Social Welfare
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• v.68 no.3
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• pp.127-147
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• 2016

The purpose of this study was to examine the impact of 10-year psychosocial rehabilitation services provided by a psychosocial rehabilitation center on the quality of life for the mentally ill. The data were collected from a psychosocial rehabilitation center located in Daegu metropolitan area using a quasi-experimental study design. The experimental group consisted of 23 mentally ill subjects and the comparison group consisted of 23 mentally ill subjects that did not use the mental health services voluntarily. The quality of life were measured at baseline and every year over 10-year period. The collected data were analyzed using Hierarchical Linear Modeling(HLM). The findings of this study were as follows: First, it was found that the psychosocial rehabilitation services were effective increasing experimental group's quality of life outcomes. Second, the analyses indicated that the psychosocial rehabilitation services' effectiveness could be maintained at least 10 years indicating that the services had a long-term positive impact on the mentally ill. Third, it was revealed that the experimental group's quality of life outcomes improved over time showing a curvelinear shape rather than showing a linear pattern. The psychosocial rehabilitation services provided by a psychosocial rehabilitation center were positively affected the quality of life as well as maintained at least 10 years for the mentally ill. Finally, the implications and limitations of these findings were discussed.

• Journal of Digital Convergence
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• v.16 no.7
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• pp.393-400
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• 2018

I would like to design a customized furniture for one-person households that have emerged as mainstream in modern society. In particular, I focused on the tendency of generations to improve the quality of life, and wanted to design the aesthetic furniture close to art furniture. To this end, I look at art furniture in domestic and overseas furniture. and present the concept of combined custom design based on current trends. The combined custom design differs from the existing one by creating separate designs for each part and fusing them to enable more diverse and aggressive molding. This is in harmony with the active tendency of one-person households who shows a lot of interest in the quality of life. Especially, it is suitable for small quantity production of various kinds, so it can be produced in the existing craft workshop system, and the two tables can confirm the possibility of the morphological concept according to actual combined custom design.

• Aerospace Engineering and Technology
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• v.7 no.2
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• pp.131-143
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• 2008

Slag mass deposition was required to predict performance accurately of KSLV-I kick motor(KM) system. The validation of the numerical analysis was performed with mass flow rate measured at 4th ground test of the KM. The study described here included internal flow field of KM at various time steps during burning. Slag mass accumulation was computed through the aluminum oxide particle paths to deviate from the gas flow streamlines in flight. These numerical analysis was performed with Fluent 6.3 program The effects for the acceleration, origins and diameters of the aluminum oxide particles was analyzed, finally the total slag mass accumulation was acquired. We confirmed that the slag mass deposition was agreement well with predicted slag mass based on kick motor the grounded test.

• Korean Journal of Health Education and Promotion
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• v.32 no.3
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• pp.97-107
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• 2015

Objectives: The current study aims to examine whether the influence of National Long-term Care Insurance(NLCI) on the quality of life(QoL) trajectory of older adults with disabilities is more positive than its influence on those without disabilities. Methods: Sample consisted of 5,362 elderly aged 65 and over who participated in the Korean Welfare Panel Study from Wave1 to Wave7. Data were analyzed using latent growth curve modeling. Results: Major findings are as follows. (1) Before the NLCI, the trajectories of QoL between older adults with disabilities and those without were same. (2) After the NLCI, elders with disabilities showed lower levels of QoL at the beginning, but the gaps gradually decreased with time. These results indicate that the implementation of NLCI more positively affected elders with disabilities than those without disabilities. Conclusions: These results suggest that the NLCI functions properly as one of social security nets to cope with the needs of older adults with disabilities. In conclusion, it is critical to develop a sustainable NLCI system to enhance the QoL of older adults with disabilities.

• Journal of Korea Spatial Information System Society
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• v.8 no.1 s.16
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• pp.59-75
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• 2006

One of the most challenging and encouraging applications of state-of-the-art technology is the field of traffic control systems. It combines techniques from the areas of telecommunications and computer science to establish traffic information and various assistance services. The support of the system requires a moving objects database system (MODB) that stores moving objects efficiently and performs spatial or temporal queries with time conditions. In this paper, we propose schemes to distribute an index nodes of trajectory based on spatio-temporal proximity and the characteristics of moving objects. The scheme predicts the extendible MBB of nodes of index through the prediction of moving object, and creates a parallel trajectory index. The experimental evaluation shows that the proposed schemes give us the performance improvement by 15%. This result makes an improvement of performance by 50% per one disk.

• Journal of Biomedical Engineering Research
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• v.19 no.3
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• pp.243-250
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• 1998

Reconstruction aspects of spiral scan imaging for ultra fast magnetic resonance imagine(MRI) have been investigated with polar and rectangular coordinates-based reconstruction. For the reconstruction of the spiral scan imaging, acquired data in spiral trjectory should be converted to polar or rectangular grids, where interpolation techniques are used. Various reconstruction algorithms for spiral scan imaging are tested, and reconstructed image qualities are compared with computed phantom. An improved reconstruction algorithm with dc-offset correction in projection domain is proposed, which provides the best reconstructed image quality from the simulation. Image artifact with existing algorithms is completely removed with the proposed method.

• Journal of the Korean Society of Propulsion Engineers
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• v.13 no.4
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• pp.1-8
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• 2009

Accumulated slag mass was predicted to estimate accurate performance of kick motor (KM) system. The validation of numerical analysis was performed with mass flow rate measured at the 4th ground test of the KM. The study described here includes the internal flow field of KM at various time steps during burning. Slag mass accumulation was analyzed through the aluminum oxide particle paths to predict slag mass deposition. Numerical analysis to solve both flow field and droplet accumulation was performed with Fluent 6.3 program. Analysing the effects of the acceleration, starting position and diameters of the aluminum oxide particles, total slag mass accumulation was obtained.