• ETRI Journal
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• v.37 no.5
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• pp.856-866
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• 2015

A heterogeneous network (HetNet) is a network topology composed by deploying multiple HetNets under the coverage of macro cells (MCs). It can improve network throughput, extend cell coverage, and offload network traffic; for example, the network traffic of a 5G mobile communications network. A HetNet involves a mix of radio technologies and various cell types working together seamlessly. In a HetNet, coordination between MCs and small cells (SCs) has a positive impact on the performance of the networks contained within, and consequently on the overall user experience. Therefore, to improve user-perceived service quality, HetNets require high-efficiency network protocols and enhanced radio technologies. In this paper, we introduce a 5G HetNet comprised of MCs and both fixed and mobile SCs (mSCs). The featured mSCs can be mounted on a car, bus, or train and have different characteristics to fixed SCs (fSCs). In this paper, we address the technical challenges related to mSCs. In addition, we analyze the network performance under two HetNet scenarios-MCs and fSCs, and MCs and mSCs.

• Journal of Korean Critical Care Nursing
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• v.10 no.1
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• pp.63-74
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• 2017

Purpose: The purpose of this study was to examine the effect of professional autonomy, organizational commitment, and perceived patient safety culture on patient safety management activities of nurses in medium and small-sized hospitals. Methods: A cross-sectional design was employed. Self-reported questionnaires were completed by 121 nurses with at least 3 months of working experience in medium and small-sized hospitals located in B city. Data were analyzed using descriptive statistics, a t-test, a one-way ANOVA, Pearson correlation coefficients, and a multiple regression analysis. Results: Professional autonomy (r=.22, p=.016), organizational commitment (r=.34, p<.001), and perceived patient safety culture (r=.55, p<.001) had a statistically significant positive correlation with patient safety management activities. The factors that might affect patient safety management activities were professional autonomy (${\beta}=.23$, p=.003) and perceived patient safety culture (${\beta}=.55$, p<.001). The explanatory power of these factors for patient safety management activities was 33.5% (F=21.19, p<.001). Conclusions: The development of repetitive and continuous education programs is needed to improve a nurse's professional autonomy and perceived patient safety culture.

• Journal of the Korean School Mathematics Society
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• v.7 no.1
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• pp.121-138
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• 2004

For the efficient application of curriculum discretion activity, I developed the program, 'Let's go together', so that curriculum discretion activity can be applied in the classroom. The program consists of several experiences, which are <Man to man paired study>, <the learning materials for Mathematics in our lives>, <the cooperative study in the class> and <the variety experiences about Mathematics>. This study shows the following results: First, T-test about the students' learning attitude and interest in Mathematics, there was dramatic change in students' desire, interest and attitude for mathematics learning. Second, as the role of Baewomi & Dowomi in 'Man to man paired study', Baewomi & Dowomi provided students with confidence of mathematics learning. We were able to ensure this fact from students' essay after the class. Third, teachers found that the number of students who had positive attitude with Self-directed study increased. And students tried to solve mathematical problems by themselves and the time using self-directed learning experience was also increased. This study suggests that there needs more development for learning materials for mathematics in our lives.

• Journal of Fisheries and Marine Sciences Education
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• v.28 no.5
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• pp.1329-1338
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• 2016

South Korea's total fertility rate dropped to 1.2 in 2014, which was far below the population replacement level of 2.07. Parental satisfaction of mothers contribute to secondary childbirth intention as well as child outcome. This study was to identify the factors affecting parental satisfaction particularly in mothers with one child. The survey conducted in five daycare centers in B city from September to October in 2015. The data were analyzed with descriptive statistics, t-tests, ANOVA, Pearson's correlation coefficient and stepwise multiple regression analyses using SPSS/Win 21 software. 42.7% of variance in parental satisfaction was accounted for by co-parenting(t=5.566, p<.001), value of children(t=3.575, p=.001), and perception of childbirth(t=2.906, p=.005). The explain power was significant(F=21.581, p<.001). This study revealed that the perception of childbirth last long enough to affect mothers of children up to the age of 6. Midwifes and nurses working with laboring women should try to give them positive experience of delivery.

• Journal of East-West Nursing Research
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• v.20 no.1
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• pp.29-36
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• 2014

Purpose: The purpose of this study is to identify relationships among work environment, job satisfaction and turnover intention of emergency department (ED) nurses. Methods: The survey was given to 220 ED nurses which are located in G metropolitan from May 1st to July 31st of 2012. The results were analyzed by descriptive statistics, t-test, ANOVA, pearson correlation coefficients and stepwise multiple regression using SPSS WIN 19.0 program. Results: The turnover intension according to the general characteristics of the subjects has significant difference between emergency room experience, current duty satisfaction, and turnover plan in 1 year. In the correlation between work environment, job satisfaction and turnover intention of the subjects, work environment and job satisfaction have positive correlation, job satisfaction and turnover intention either job satisfaction and turnover intention have a negative correlation. Factors influencing turnover intention are job satisfaction, career and current duty satisfaction, also the full explanatory power of the model was 24.4%. Conclusion: The results indicate factors that influence turnover intention are job satisfaction, career, and current job satisfaction. We hope these result help to provide effective intervention strategies for reducing ED nurses' turnover.

• Journal of Korean Clinical Nursing Research
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• v.26 no.2
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• pp.164-174
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• 2020

Purpose: This study was to investigate the relationships among patient safety culture, safety competence and safety nursing activity among nurses in anesthetic and recovery rooms, and to identify the factors contributing to safety nursing activity. Methods: A descriptive correlational study was conducted. Participants were 156 nurses from 13 hospitals. Data were collected from February 11 to March 15th, 2019, and analyzed using descriptive statistics, t-test, Mann-Whitney U test, one-way ANOVA, Pearson's correlation and multiple regression analysis with SPSS statistics 24.0 Program. Results: Safety nursing activity was significantly different in relation to nurses' level of education, position at work, clinical career, clinical career at anesthetic and recovery rooms, and work experience in patient safety. Safety nursing activity demonstrated a significant positive correlation with patient safety culture and patient safety competence. Factors contributing to safety nursing activity were patient safety knowledge, skill and attitude, clinical career, clinical career at anesthetic and recovery rooms, and the patient safety improvement system which explained 57.0% of total variance of safety nursing activity. Conclusion: To improve safety nursing activities at anesthetic and recovery rooms, it is necessary to develop patient safety programs with enhanced knowledge, skill and attitude to take patient safety as a top priority.

• Journal of International Academy of Physical Therapy Research
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• v.8 no.2
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• pp.1135-1141
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• 2017

Stress and fatigue are general physical aspects of our daily lives. It has been shown that physical therapists have different levels of job stress and fatigue according to the type A/B behavior patterns. This study collected data from 212 physical therapists between October 28 and November 23, 2016 using an anonymous, self-administered questionnaire. The study results showed the proportion of physical therapists with the Type A behavior patterns(TABP) was 18% greater than that of physical therapists with the Type B behavior patterns(TBBP). In this study, physical therapists with TABP were compared with physical therapists with TBBP. The results indicated that physical therapists with TABP were more inclined to experience higher levels of overall job stress and fatigue from the following stress factors: physical environment, job requirement, and job autonomy. Therefore, the stronger the tendency toward TABP, the stronger the feeling of job stress and fatigue from physical environment, job requirement, and job autonomy. Those with a tendency toward TBBP showed positive correlations between job requirement and the total job stress score; thus, the stronger the tendency toward TBBP, the stronger the feeling of overall job stress and fatigue from job requirement. This study suggests that it is necessary to manage the job stress and fatigue of physical therapists with both TABP and TBBP and to manage the job stress and fatigue of physical therapists with the type A behavioral pattern.

• Journal of Korean Academy of Nursing Administration
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• v.10 no.3
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• pp.325-334
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• 2004

Purpose: The purpose of this study was to identify the image of nurses and the professional self-concept perceived by nursing students. Method: The subjects included were 93 students. The research tool was the Professional Self-Concept of Nurses Instrument(PSCNI) by Arthur and Image of Nurses by Yang. Result: 1. The professional self-concept consisted of 4 factors : flexibility, satisfaction, competence, empathy. 2. The image of nurse consisted of 4 factors : official image, maternal image, professional image. unfavorable image. 3. The average item score of PSCNI was $2.94{\pm}30$. 4. The average item score of nurse' image was $3.63{\pm}46$ 5. The Professional self-concept of nurses(p=.0001) and image of nurses(p=.001) was found to significantly according to satisfaction for major. 6. The correlation between professional self-concept and image of nurses revealed correlation of r=.315(p=.004). Conclusion: There was a association between professional self concept of nurses, image of nurses and satisfaction for major. Therefore it is required to develop education program and strategy that helps establish satisfaction for major so that nursing students can experience firm professional self concept and positive image of nursing.

• Journal of Korean Academy of Nursing Administration
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• v.19 no.3
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• pp.329-339
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• 2013

Purpose: This study was conducted to provide basic data on the nursing Happiness Index and identify factors influencing nurses by describing their perception of lifestyle, health behavior, nursing professionalism, Happiness Index, and turnover intention. Methods: On July 2012, 700 nurses from 10 general hospitals were surveyed, but 23 were omitted due to missing or incomplete data. The focus of this study was the Organization for Economic Co-operation and Development (OECD) Happiness Index, consisting of 11 OECD identified topics concerning living conditions and quality of life. Data were analyzed using $x^2$-tests, t-test, ANOVA, Pearson correlation coefficients and multiple regression with SPSS/WINdow 14.0. Results: Mean score for nurses' Happiness Index was 3.03 on a scale of 5. There were significant differences on the Happiness Index for the following: age, marriage, children, education, position, work experience, wages, number of beds, medical institution, health behavior, weight, and meal patterns. There was a positive correlation between the happiness index and nursing professionalism but a negative correlation between the happiness index and turnover intention. Conclusion: Results indicate that factors influencing happiness are autonomy, sense of calling and turnover intention suggesting the need to improve nursing professionalism for a life of happiness among hospital nurses.

• Journal of Korean Academy of Nursing
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• v.34 no.1
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• pp.93-101
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• 2004

Purpose: This study was designed to explore the relationship of situational meaning with maternal self-esteem in mothers with high risk newborn. Method: The subjects of this study were 82 mothers with high risk newborn. Data were collected using a translated Family Meaning Attribution Scale and Maternal Self-Report Inventory. Data were analyzed using descriptive statistics, t-test, Pearson Correlation Coefficients and Stepwise Multiple Regression. Result: The average score of the situational meaning in high risk newborn mothers was 64.0l(possible score is between 0-96) and the average score of each item was 1.98. The average score of the maternal self-esteem in high risk newborn mothers was 81.96(possible score is between 26-104) and the average score of each item was 3.15. No significant differences were found in situational meaning according to general characteristics except whether it was a planned pregnancy or not. No significant differences were found in maternal self-esteem according to general characteristics except disease or admission experience during pregnancy. There was significant positive correlation between situational meaning and maternal self-esteem. Conclusion: It is necessary for nurses to provide high risk newborn mothers with care for improving situational meaning that is attributed to the mothers. It can be helpful to improve maternal self-esteem and in the end it will facilitate the maternal transition in mothers with high risk newborn.