• Research in Community and Public Health Nursing
• /
• v.20 no.1
• /
• pp.23-30
• /
• 2009

This study was to identify the relationship among self-management, economic stability, self-esteem, self-achievement and predictor of the self-achievements in elders. Methods: A total of 294 subjects aged between 60 and 92 were selected through convenient sampling. Data were collected by self-reported questionnaire from May to June, 2008. Collected data were analysed by the SPSS/WIN 15.0 program. Results: Self-management, economic stability, self-esteem, self-achievement were positively correlated. The most significant predictor of self-achievement in elders were self-management and self-esteem. Conclusion: These findings suggest that self-achievement is influenced by self-management and self-esteem and needed for aged well

• The Korean Journal of Health Service Management
• /
• v.14 no.2
• /
• pp.15-27
• /
• 2020

Objectives: The purpose of this study is to compare analysis of financial performance in university hospitals. Methods: Data from 2005 to 2017 were collected from income statement, balance sheet, and annual reports in 23 university hospitals. The dependent variables are used financial performance, namely, medical profit to total assets, medical profit to medical revenue, and net profit to medical revenue. The independent variables are establishment type, hospital province, bed, open liquidity, stability, and activity. Results: From 2005 to 2007, university hospitals steadily increased medical revenues, nonmedical revenues, medical profit, net profit, and reserve fund for essential business by investing fixed assets using financial leverage. From 2015 to 2017, the debt ratio was minimized based on existing management performance. Results showed that university hospitals maintained high profitability by actively investing in medical equipment, medical environment, and facilities using reserve fund for essential business. Conclusions: Results suggest that this will be the basic data for efficient management of university hospitals.

• Journal of Soil and Groundwater Environment
• /
• v.18 no.5
• /
• pp.15-25
• /
• 2013

In this study, two kinds of soil-based proficiency testing materials (PTMs), NICE-012L and NICE-012R were prepared and certified for Benzen, Toluene, Etylbenzene and Xylene with evaluation of uncertainties. In order to analyse BTEX (Benzen Toluene Etylbenzene Xylene) for the candidate materials, GC/MS was used after pretreatment according to methods of soil analysis by Ministry of Environment. For the homogeneity test among bottles in terms of candidate materials, ISO 13528 and IUPAC Protocol were used and according to the result, both candidate materials showed sufficient homogeneity. Also, the stability test over the candidate materials was accessed according to the ISO Guide 35 by classifying short-term and long-term stability and the result showed that both candidate materials showed decent stability. The reference values of the two candidate materials depending on BTEX components were derived from the average of the 11 samples that were used for verification of the samples' homogeneity. Uncertainty of measurement was combined by uchar that was caused by a characteristic value, $u_{bb}$ that was caused by between-bottle homogeneity, and $u_{stab}$ that was caused by stability, and then combined uncertainty ($u_{PTM}$) was multiplied to the coverage factor (k) derived from the effective degree of freedom from each factor that leads to expanded uncertainty (U) in about 95% of confidence level. The proficiency testing materials developed through this study were supplied to National Institute of Environmental Research (NIER) and utilized as an external proficiency testing materials for evaluating analysis capacity of soil agencies with specialty in terms of soil analysis approved by Minister of Environment.

• Journal of Families and Better Life
• /
• v.20 no.4
• /
• pp.197-206
• /
• 2002

The purpose of this study was to examine the effect of marital characteristics on the marital stability among the elderly couples. Each participant was measured using a scale for the concept of marriage, a scale for marital coherence, a marital stress scale, a coping behavior scale and a marital stability scale. Elderly people who have a living spouse and who are living In Seoul were recruited. The data from two hundred and forty participants over 60-years-old were used in the final analyses. Major findings are as follows First, demographic factors such as educational level, health, economic status, the main source of income, and employment status appeared to significantly predict the elderly folks'marital stability Second, gender seems to be a factor In elderly couples'experience of marital stability. Husbands perceived marital stability to be higher than wives did. Third, the perception of marital stress, positive coping behavior and marital coherence influence the marital stability of the elderly couples. That is, the less elderly couples perceived marital stress and the less they relied on negative coping behaviors, the higher they perceived marital stability. These results imply that a healthful coping behavior to marital stress is important in enhancing marital stability for elderly couples.

• Proceedings of the Korean Geotechical Society Conference
• /
• 2005.03a
• /
• pp.898-905
• /
• 2005

The settlement of embankment on soft clay includes shear settlement due to shear deformation. Even though the consolidation settlement is not related to lateral displacement, but shear settlement makes the embankment unstable because it deforms ground and decreases the ground strength. In order to determine the shear deformation behaviour during embankment construction, 3 cases (1B, 2B, and 3B) of rapid undrained loading tests on soft clays were performed. Shear settlement is consist of elastic settlement, plastic settlement and viscous settlement. Elastic settlement isn't considered because the range is small, therefore the first is the range of plastic displacement, and the second is that of viscous displacement in the displacement-time curve for each loading stage. After determining that the change in the inclination of the viscous displacement range is larger than in the plastic displacement range after the ground failure occurs for the loading stage, the stability management methods were suggested considering that it is hard to divide the plastic displacement range and the viscous displacement range. The stability management method was based on the ratio of the plastic displacement range's inclination and the viscous displacement range's inclination. A stability management method based on the ratio of the total inclination for each loading stage compared to the whole inclination in the initial loading stage was also recommended.

• Journal of Korean Society for Quality Management
• /
• v.38 no.1
• /
• pp.96-100
• /
• 2010

The shelf-life of pharmaceutical products is the time that the average product characteristic remains within an approved specification after manufacture. Since the true shelf-life of a drug product is typically unknown, it has to be estimated based on assay results of the drug characteristic from a stability study usually conducted during the process of drug development. The nonparametric statistical methods of assessing the shelf-life of drug are considered with the current FDA regulations. Some simulation studies of nonparametric methods are also presented with the discussion.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2000.04a
• /
• pp.261-264
• /
• 2000

When there ate several classes of customers demanding service times with different distributions at some stations of a queueing network, the stability problem becomes suddenly complicated compared with the single class case. Recently many researchers had tried to find some kind of stability conditions for multiclass queueing networks, but did not get significant results except in very limited 2-station cases. In this study, we try to develop some dynamic control techniques which can guarantee the stability under the nominal traffic condition. Our approach includes the randomization method and the leaky bucket control scheme. Also, we mention other possibilities such as the discrete-review approach and the generalized round-robin technique. Both theoretical and experimental results will be presented.

• Journal of Family Resource Management and Policy Review
• /
• v.10 no.1
• /
• pp.67-81
• /
• 2006

This study focused on the system regarding leave of absence in relation to family welfare, which has become a routine in some western countries, in three different perspectives. Those were the relations between reduced working hours and quality of life, maternal recreation, and finally, relations between infrastructure of vacation and culture. Systematic settlement of reduced working hours and maternal recreation in Germany allowed more time among family members and made large contribution to the improvement of family welfare in general. Since the stability of society is strongly based on the stability of family, Germany deserved to be case-studied as a good model. The recent tendency shows that Korean workers are starting to spend more time with their own family members than with their colleagues, and, as seen in the case of Germany, the stability of family welfare will improve if various infrastructures for family leisure are properly established in Korea.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.5 no.3
• /
• pp.542-559
• /
• 2011

Most game-theoretic works of Aloha have emphasized investigating Nash equilibria according to the system state represented by the number of network users and their decisions. In contrast, we focus on the possible change of nodes' utility state represented by delay constraint and decreasing utility over time. These foregone changes of nodes' state are more likely to instigate selfish behaviors in networking environments. For such environment, in this paper, we propose a repeated Bayesian slotted Aloha game model to analyze the selfish behavior of impatient users. We prove the existence of Nash equilibrium mathematically and empirically. The proposed model enables any type of transmission probability sequence to achieve Nash equilibrium without degrading its optimal throughput. Those Nash equilibria can be used as a solution concept to thwart the selfish behaviors of nodes and ensure the system stability.

• The Journal of Economics, Marketing and Management
• /
• v.11 no.3
• /
• pp.25-35
• /
• 2023

Purpose: This paper examines whether foreign aid influences public sector efficiency in policy areas of administration, education, and stability. Research design, data and methodology: The study uses panel data of 77 aid recipient developing countries over the period 2000-2020 and employs various panel data techniques to estimate. Results: We found that a percentage change in foreign aid increases administrative efficiency by 0.02 to 0.04 on average ceteris paribus in the short run. On the other hand, a percentage increase in foreign aid decreases education efficiency by 0.005 to 0.006 on average. While the impact of foreign aid on the policy area of stability is insignificant. Conclusions: The empirical results of this study have important implications for both donors and aid recipient countries. It suggests that to get positive influence from foreign aid, in the area of education and stability, the recipient countries need to increase accessibility of secondary schools with quality education especially; technical and vocational. Also, the donor should provide a minimum threshold amount of foreign aid to developing countries for reforming the institutions' capacity building.