• Physical Therapy Korea
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• v.20 no.3
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• pp.27-35
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• 2013

The aim of this study was to compare the electromyographic (EMG) activity levels of the scapular upward rotators [upper trapezius (UT), lower trapezius (LT), and serratus anterior (SA)] and other scapular muscles [posterior deltoid (PD), levator scapulae (LS), and infraspinatus (IS)] during isometric lower trapezius exercises. Twenty males with no medical history of shoulder pain or upper extremity disorders were recruited for this study. EMG activity was recorded from the UT, LT, SA, PD, LS, and IS while subjects performed three different exercises: Prone arm lift (PAL), Backward rocking diagonal arm lift (BRDAL), Modified Prone Cobra (MPC). One-way analysis of variance (ANOVA) was used to determine any significant differences among the three exercises. A lower relative activation of UT, LT, and SA was seen with the MPC than with the other exercises (p<.05). The relatively lower activation of the UT identified, the MPC exercise as the preferred choice for preferential strengthening the LT (p<.05). However, a higher activation in the PD, LS, and IS occurred with the MPC than with the other exercises (p>.05). The recruitment pattern of synergist varied depending on the exercise posture. These findings suggest that exercise posture is an important factor in the selection of strengthening exercise for weak muscle.

• Korean Journal of Adult Nursing
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• v.23 no.3
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• pp.244-254
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• 2011

Purpose: The objective of this study was to evaluate adherence to self-care and identify associated factors in outpatients with Heart Failure (HF). Methods: Using a cross-sectional design, a convenience sample of 249 outpatient clinic patients were recruited at S university hospital. Between October 2009 and December 2009, data were collected through questionnaires and medical record review. Results: The total mean score of adherence to self-care was $18.07{\pm}3.56$ out of a possible 45 points. Among self-care dimensions, adherence to medication and low salt diet was high, while lower adherence was reported in contact with health professionals if symptoms such as weight gain, edema and fatigue were presented. Multivariate analysis adjusted for other socio-demographic and clinical factors showed that disease knowledge related to heart failure (p<.001) and left ventricular ejection fraction (p=.027) were independent predictors of adherence to self-care. These factors explained 23% of total variance in the adherence to self-care. Conclusion: Heart failure patients with higher disease knowledge and those who have good systolic function may be more likely to engage in adherence to self-care than those with lack of disease knowledge and low contractility. Further research is needed to confirm these results and identify other predictors of adherence to self-care.

• The Journal of the Acoustical Society of Korea
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• v.16 no.6
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• pp.36-40
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• 1997

The effectiveness of Extracorporeal Shock Wave Lithotripter(ESWL) for the therapy of calculus has been generally known in the field of urology. However, there are very little paper investigated about physical characteristics of sounds radiated when phantom is shotting with shock waves. Therefore, this paper, firstly, investigates the sounds radiated when impact is applied to the phantom with a single shot by an impact hammer and a clinical ESWL Next, it determines the variance of the sounds radiated during the breaking process using a piece of chalk as a phantom of a calculus. These results will be applied to the examination of the existence of the calculus at the focus and the monitoring the breaking process.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.20 no.3
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• pp.259-268
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• 2013

Purpose: The purpose of this study was to identify factors influencing job satisfaction among nurses working in college health centers in order to enhance their role functions and to increase their work capabilities. Method: In this study a cross-sectional survey was used to collect data from 106 nurses working in college health centers. Collected data were analyzed using frequency, Pearson correlation coefficients, independent t-test, one-way ANOVA and multiple regression with the SPSS 20.0. Results: Mean scores for self-efficacy, job stress and job satisfaction for the participants were 3.86 (5-point scale), 2.51 (5-point scale) and 3.37 (5-point scale) respectively. There was a negative correlation between self-efficacy and job satisfaction (r=-.653, p<.001). Factors influencing job satisfaction were job stress (${\beta}$=-.58, p=<.001), level of perception among the nurses that they were contributing to the health promotion of students (${\beta}$=-.21, p=.005) and marital status (${\beta}$=.17, p=.029). These 3 elements accounted for 47.7% of the variance in job satisfaction. Conclusions: The results indicate that reduction in job stress and increase in the perception that nurses are contributing to the promotion of students' health are important to reinforce the role function of nurses and to increase their work capabilities.

• Korean Journal of Adult Nursing
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• v.14 no.2
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• pp.287-295
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• 2002

Purpose: The purpose of this study was to assess social support, mood, and commitment to a plan for exercise of Korean adults with chronic diseases. Further, the relationships between social support, mood, and commitment to a plan for exercise were assessed. Method: The participants in this study were 230 Korean adults over 18 years of age with chronic diseases who were recruited in hospitals or health centers. The instruments used in this study were Exercise Social Support Scale, POMS (Profile of Mood States), and Commitment to a Plan for Exercise Scale. Result: The results of descriptive analysis showed that Korean adults with chronic diseases were perceived with relatively low commitment to a plan for exercise while they were perceived with moderate social support and mood states. Pearson's correlation coefficient showed significant relationship between these three variables. Stepwise regression indicated that 37% of the variance in commitment to a plan for exercise was explained by social support and vigor factor of the POMS. Conclusion: Health professionals can use this information for planning a targeted strategy to increase regular exercise among Korean adults with chronic diseases in order to improve their quality of life and control disease-related symptoms.

• Journal of muscle and joint health
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• v.21 no.3
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• pp.165-172
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• 2014

Purpose: The purpose of this study was to identify effects of postural habits and stress on low back pain experienced by nursing students. Methods: The survey was conducted with 282 students at 5 nursing schools in Seoul, Incheon, Chungcheongbuk, and Jeollabuk Province. Data were collected from October, 2013 to January, 2014. Data analyses including descriptive analysis, ANOVA, Pearson's correlation coefficient, Spearman's rank correlation coefficients, and multiple regression were performed using SPSS 21.0. Results: In multiple regression, habit of standing on force of one feet (${\beta}=.23$, p<.001), habit of sleeping on one's back (${\beta}=-.19$, p=.020), habit of resting the chin on one's hands (${\beta}=.15$, p=.029), and habit of carrying a bag on one shoulder (${\beta}=.12$, p=.011) were associated with low back pain experienced by nursing students. These factors accounted for 12.9% of the variance in the low back pain in undergraduate students. Conclusion: These results suggest that low back pain in nursing students are related to their habits of posture in daily life. Therefore, intervention program to encourage healthy postural habits can be effective to prevent low back pain in nursing students.

• Proceedings of the Korean Society of Applied Pharmacology
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• 2002.07a
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• pp.206-206
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• 2002

The bioequivalence of two 4 mg triamcinolone tablets (Dong-Kwang $\textrm{Tramcinolone}^{(R)}$ vs. Wyeth Korea $\textrm{Ledercoat}^{(R)}$) was assesed in healthy male Korean volunteers after oral administration of 16 mh triamcinolone in a randomized crossover study. Blood samples were collected at specified time intervals, and plasma was analyzed for triamcinolone using a validated HPLC method. The pharmacokinetic parameters of $T_{max}$, $C_{max}$, $AUC_{0{\longrightarrow}last}$. $AUC_{0{\longrightarrow}imf}$, and $T_{1/2,\beta}$ were determined from plasma concentration-time profile of two formulations. The pharmacokinetic parameters were statistically compared to evaluate bioequivalence between two formulations, according to the United State or Korea Food and Drug Administration Guidelines. The analysis of variance did not show any signigicant difference between the two formulations and 90% confidence limits fell within the acceptable range (80-120%) for bioequivalence. Based on these data it was concluded that the two products showed comparable pharmacokinetic profiles and that the Dong-Kwang $\textrm{Tramcinolone}^{(R)}$ tablet is bioequivalent to the $\textrm{Ledercoat}^{(R)}$ tablet produced by Wyeth Korea.

• Korea Journal of Hospital Management
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• v.13 no.2
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• pp.64-85
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• 2008

This study purports to investigate the determinant of job satisfaction among workers working at Long-term care hospitals. The independent variables contain three groups of determinants: organizational characteristics variables(job autonomy, job variety, distributive justice, role conflict, supervisor support, job suitability, job significance, job security, organizational support, job growth, promotional opportunity), environmental variables(job opportunity), and psychological variables (met expectation, job efficacy, positive affectivity, and negative affectivity). The sample used in this study consisted of 250 workers from 4 Long-term care hospitals nationwide. Data were collected with self-administered questionnaires and analyzed using multiple regression analysis. The results of the study are as follows: 1) the following variables, listed in order of size, have significant effects on job satisfaction: negative affectivity(-), job significance(+), job growth(+), age(+), positive affectivity(+), organizational support(+), job opportunity(-). 2) the variance of job satisfaction explained by the variables used in the study are 53.8%. When demographic variables added to Model I, job satisfaction explained by variables are 55.4%. 3) the results of this study indicate that three variables of negative affectivity, job significance, job growth are especially important for improving the level of job satisfaction among workers at Long-term care hospitals.

• Human Ecology Research
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• v.53 no.1
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• pp.107-117
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• 2015

The purpose of this study was to examine the general characteristics and the variety of family life experiences related to the life satisfaction of multicultural families with school-aged children. Data were drawn from the first wave of the Korean Children and Youth Panel Survey conducted in 2010 and developed by the National Youth Policy Institute. Further, the sample for this study consisted of 95 multicultural families who met the requirements. The data were analyzed by descriptive statistics, the t -test, analysis of variance, and multiple regression using SPSS ver. 18.0. The main results showed that family life experiences that were made up of 5 domains, specifically time, leisure, household economy, health, and child education had a broad range of levels. In addition, family life experiences differed according to the general characteristics of multicultural families with school-aged children, such as mother's employment status, number of children, father's employment status and education level, and family composition. Lastly, their life satisfaction was significantly predicted by the father's employment status and health, children's age, children's education, and leisure in the order of significance. These findings suggested the need to expand the social intervention range for multicultural families with school-aged children, particularly in terms of family leisure and children's school life adaptation.

• Journal of Power Electronics
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• v.16 no.6
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• pp.2294-2305
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• 2016

The introduction of a high-voltage direct-current (HVDC) system based on a modular multilevel converter (MMC) for wind farm integration has stimulated studies on methods to control this type of converter. This research article focuses on the control of the AC voltage and circulating current for a wind-farm-side MMC (WFS-MMC). After theoretical analysis, emotional learning (EL) controllers are proposed for the controls. The EL controllers are derived from the learning mechanisms of the amygdala and orbitofrontal cortex which make the WFS-MMC insensitive to variance in system parameters, power change, and fault in the grid. The d-axis and q-axis currents are respectively considered for the d-axis and q-axis voltage controls to improve the performance of AC voltage control. The practicability of the proposed control is verified under various conditions with a point-to-point MMC-HVDC system. Simulation results show that the proposed method is superior to the traditional proportional-integral controller.