• Research in Community and Public Health Nursing
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• v.31 no.3
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• pp.360-374
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• 2020

Purpose: This study aims to identify the mediating effect of health promoting behavior in the relationship between depression and health-related quality of life, and between social support and health-related quality of life among migrant workers. Methods: Data were collected from 152 migrant workers working at companies in K and B metropolitan cities. The study conducted a survey from August 1 to September 30, 2019, and used self-report structured questionnaires that were translated into English and Korean. The data were analyzed using descriptive statistics, Pearson correlation coefficient, simple and multiple regression, Baron and Kenny's method, and Sobel test. Results: Depression was significantly negatively correlated with social support (r=-.29, p<.001), health promoting behavior (r=-.30, p<.001) and health-related quality of life (r=-.44, p<.001). And social support was significantly positively correlated with health promoting behavior (r=.50, p<.001) and health-related quality of life (r=.44, p<.001). And health promoting behavior was significantly positively correlated with health-related quality of life (r=.51, p<.001). Furthermore health promoting behavior showed partial mediating effects in the relationship between depression and health-related quality of life (Z=3.26, p<.001), and showed partial mediating effects in the relationship between the social support and health-related quality of life (Z=3.98, p<.001). Conclusion: In this study, depression and social support were shown to mediate health promotion behavior to improve health-related quality of life. Therefore, in order to improve the health-related quality of life of migrant workers, it is necessary to focus on the health promotion behaviors, and effective strategies are needed to reduce depression, and support social support.

• Asian-Australasian Journal of Animal Sciences
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• v.22 no.4
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• pp.520-527
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• 2009

Alfalfa (Medicago sativa L) is a high-quality forage for ruminants and the main stem is the dominant morphological component contributing to the forage nutritive value in mature alfalfa forage. Shearing force, a fracturing property of plant stem, is an important indictor of forage value. The objectives of this study were to investigate the effects of morphological characteristic on shearing force, the relationship between shearing force and chemical composition, and the relationship between shearing force and in situ digestibility of alfalfa stem. The results showed that linear density (weight per unit length of stem) was more important than chemical composition in affecting shearing force. There was a positive relationship between lignin content and shearing force (r = 0.78). Correlations were not found between shearing force and other chemical components such as neutral detergent fiber (NDF), acid detergent fiber (ADF), cellulose and hemicelluloses. In situ digestibility (of dry matter and NDF) was related to shearing force. A negative correlation was found between shearing force and dry matter (DM) digestibility (r = -0.70), and there was also a negative correlation between shearing force and NDF digestibility (r = -0.87). When shearing force was standardized for stem diameter or stem linear density, the relationship between shearing force and digestibility was consistent regardless of stem diameter and stem linear density. Shearing force was significantly correlated with lignin content and in situ digestibility (of DM and NDF), and was a more direct indicator for estimating forage nutritive value related to animal performance, so it can be used to predict the forage value of alfalfa.

• Journal of Korea Water Resources Association
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• v.47 no.4
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• pp.371-384
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• 2014

This study developed a new algorithm of extreme rainfall extraction based on the Communication, Ocean and Meteorological Satellite (COMS) and the Tropical Rainfall Measurement Mission (TRMM) Satellite image data and evaluated its applicability for the heavy rainfall event in July-2011 in Seoul, South Korea. The power-series-regression-based Z-R relationship was employed for taking into account for empirical relationships between TRMM/PR, TRMM/VIRS, COMS, and Automatic Weather System(AWS) at each elevation. The estimated Z-R relationship ($Z=303R^{0.72}$) agreed well with observation from AWS (correlation coefficient=0.57). The estimated 10-minute rainfall intensities from the COMS satellite using the Z-R relationship generated underestimated rainfall intensities. For a small rainfall event the Z-R relationship tended to overestimated rainfall intensities. However, the overall patterns of estimated rainfall were very comparable with the observed data. The correlation coefficients and the Root Mean Square Error (RMSE) of 10-minute rainfall series from COMS and AWS gave 0.517, and 3.146, respectively. In addition, the averaged error value of the spatial correlation matrix ranged from -0.530 to -0.228, indicating negative correlation. To reduce the error by extreme rainfall estimation using satellite datasets it is required to take into more extreme factors and improve the algorithm through further study. This study showed the potential utility of multi-geostationary satellite data for building up sub-daily rainfall and establishing the real-time flood alert system in ungauged watersheds.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.4
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• pp.211-220
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• 2018

This study was conducted to identify the mediating effects of the therapeutic relationship with mental health professionals between empowerment and recovery in mental illness. The participants were 168 adults in two community mental health centers and three rehabilitation centers in Jeonbuk. The data were collected by structured questionnaires from April 15 to April 30, 2015 and analyzed using descriptive statistics, Pearson's correlation coefficient, and multiple regression analysis with the SPSS 19.0 statistical program. The mean score of empowerment for mental illness, recovery and therapeutic relationship were $60.4{\pm}10.85$, $101.8{\pm}20.70$ and $74.5{\pm}14.30$, respectively. There were significantly positive correlations between recovery in empowerment and therapeutic relationship (r=0.33, p<0.001), as well as empowerment and recovery (r=0.51, p<0.001), while there were significantly positive correlations between therapeutic relationship and recovery (r=0.55, p<0.001). Therapeutic relationship had a partial mediated effect between empowerment and recovery, which was found to be significant by the Sobel test (z=3.706, p<0.001). The results of this study can be used as basic data for development of a practical recovery-enhancing program to promote therapeutic relationships and improve empowerment in relation to therapist of the mentally disabled.

• Journal of Sensor Science and Technology
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• v.20 no.2
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• pp.71-76
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• 2011

To characterize the relationship between the stage of hepatic fibrosis and bioimpedance, several electric parameters were estimated in rats with $CCl_4$-induced liver fibrosis. Thirty three Sprague-Dawley rats were intraperitoneally injected with a $CCl_4$-mineral oil mixture (1:1, 0.2 mL/100 g) twice a week for 8 weeks. The resistance(R), reactance(X), impedance(Z), and dissipation factor(D) between 1 kHz and 100 kHz were then evaluated in the livers of the rats under pentobarbital anesthesia using an HP4294A Impedance Analyzer. The rats were killed 2, 4, 6, and 8 weeks later, and their livers were classified in accordance with Ishak's scoring system. R, X, and Z changed in accordance with the progression of hepatic fibrosis and the changes were greater at lower frequencies than at higher frequencies. In comparison, the D spectrum was biphasic; D increased initially then decreased with increasing frequency. All of the parameters(R, X, Z, and D) changed in accordance with the stage of fibrosis in the livers, but D changed specifically with the progression of fibrosis. These results indicate that hepatic fibrosis may be evaluated by determining the changes in D.

• Journal of the Korea Convergence Society
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• v.12 no.3
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• pp.371-379
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• 2021

This study aimed to verify the mediating effect of rejection sensitivity on the relationship between self-esteem and happiness among nursing students. From May 30 to June 10, 2018, 214 nursing students from a university were selected for convenience, and the results were analyzed using SPSS 22.0. The degree to which the rejection sensitivity of nursing students is mediated by self-esteem and happiness was determined following the guidelines of Baron and Kenny, and the Sobel test was used to verify the statistical significance of the mediated effects. There was a positive correlation between self-esteem and happiness among nursing students(r=.62, p<.001) and a negative correlation between rejection sensitivity and happiness(r=-.33, p<.001). A partially mediated effect (Z=3.769, p<.001) of rejection sensitivity was found on the relationship between self-esteem and happiness of nursing students. Therefore, education and activity programs are needed to increase the happiness of nursing students and help them maintain a satisfactory college life.

• Journal of Technology Innovation
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• v.19 no.2
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• pp.25-51
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• 2011

This study examine the firms fund R&D expenditures through cash and cash equivalents under financial distress in order to avoid huge adjustment costs that can be brought after R&D expenditures cut-down. Other study divided the firms' financial condition by only firms' year. This study identifies the firms' financial condition not only by a firm's year but also by firm size and Altman's Z-Score and K-Score. The results show that there are statistically negative relationship between R&D expenditures and cash and cash equivalents when firms are under financial distress. The results are same regardless of criteria of classification of firms' financial condition, which is consistent to the hypothesis. Young and small firms and firms with moderate possibility of bankruptcy fund R&D expenditures through cash and cash equivalent compared to the other firms. We can find the new evidence when we classify the firm by Z-Score and K-Score of Altman. The firms with high possibility of bankruptcy can not fund for R&D activities from cash, but only the firms with moderate possibility of bankruptcy fund R&D expenditures through cash and cash equivalent in the condition of financial distress. The evidence suggests that firms fund R&D expenditures by cash and cash equivalent when they are under financial distress. Findings provide an implication on the management of R&D expenditures and liquidity in the firms.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.12
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• pp.300-309
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• 2017

This study was conducted to investigate the mediated effects of self-efficacy in relation to communication competency within the medical team and turnover intention of hospital nurses. Data were collected from 208 nurses working at two university hospitals. In analyzing data using SPSS/WIN 23.0 program, descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient and after analyzed with Multiple regression analysis using Baron & Kenny's 3 stage procedure, confirmed indirect effect with Sobel test. Evaluation of relationships among communication competency, turnover intention and self-efficacy of subjects revealed a negative relationship(r=-0.22, p=0.001) between communication competency and turnover intention, a positive relationship(r=0.61, p<0.001) between communication competency and self-efficacy and a negative relationship(r=-0.25, <0.001) between self-efficacy and turnover intention. Concerning the mediated effect of self-efficacy in the relationship between communication competency and turnover intention, the influence of communication competency at stage 1 on turnover intention was significant(${\beta}=-0.22$, p<0.001), but communication competency at stage 3 had no significant influence on turnover intention(${\beta}=-0.11$, p=0.194). Accordingly, the mediated effect of self-efficacy in the relationship between communication competency and turnover intention fully mediated and the mediated effect of self-efficacy was significant(z=-2.15, p=0.032). Heightening self-efficacy by improving communication competency could effectively reduce the turnover intention of nurses.

• Proceedings of the Korean Society of Crop Science Conference
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• 1988.02a
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• pp.66-67
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• 1988

• Journal of Korean Society of Forest Science
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• v.87 no.4
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• pp.562-570
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• 1998

This study was carried out to investigate the percentage of the net precipitation in Korean Pine(Pious koraiensis S. et Z.) stand separated by monthly, annually, the amount of rainfall and distance away from stem, at University of Sangji, Wonju, Kangwon province, during the period from April 1993 to October 1996. The average percentage of net precipitation showed 55.7% of the total precipitation, the minimum percentage of net precipitation was 45.7% in May and the maximum percentage was 62.9% in July. The average percentage of net precipitation at 0.3m far away from the stem showed 45.9% of the total precipitation and showed 60.3% at 0.6m distance. The average percentage of net precipitation within precipitation of 10mm and less showed 37.5% of tatoal precipitation and showed 70.9% within precipitation of 100mm and over. The relationship between percentage of through-fall and total precipitation were highly significant. It was estimated to be $Y_{(%)}=12.35LnX_{(mm)}+9.45$($R^2=0.735^{(**)}$). The relationship between stemflow and rainfall was estimated to be $Y_{({\ell})}=0.27X_{(mm)}-1.83$($R^2=0.921^{(**)}$). The relationship between percentage of net precipitation and total precipitation was estimated to be $Y_{(%)}=13.79LnX_{(mm)}+4.56$($R^2=0.946^{(**)}$) with significance at 1% level.