• Journal of Convergence for Information Technology
• /
• v.11 no.9
• /
• pp.1-7
• /
• 2021

Since recently only an auto-correlated superposition coding (SC) scheme for non-orthogonal multiple access(NOMA) has been investigated, this paper proposes a cross-correlated SC scheme for NOMA. First, we derive the closed-form expression of the sum rate of the proposed cross-correlated SC scheme. Then, numerical analyses demonstrate that the sum rate of the proposed cross-correlated SC scheme is larger than that of the conventional auto-correlated SC scheme. We also show that for the stronger channel gain user, the signal-to-noise ratio (SNR) gain of the proposed cross-correlated SC scheme is about 15, compared with the conventional auto-correlated SC scheme. As a result, the proposed cross-correlated SC scheme could be a promising technology for 6G ultra-reliable low-latency communications (URLLC).

• Journal of Convergence for Information Technology
• /
• v.11 no.2
• /
• pp.90-97
• /
• 2021

In this study, a Bi2Te3 thermoelectric generator (TEG) was fabricated to convert unused thermal energy into useful electrical energy. For the performance test, a dedicated experiment device consisting of a heating block operating with cartridge heaters and a cooling block through which a refrigerant flows was constructed. A 3×3 array of thermocouples was mounted on the heating block and the cooling block, respectively, to derive the temperature fields and heat transfer rate onto both sides of the TEG. Experiments were conducted for a total of 9 temperature differences, obtaining V-I and P-R curves. The results of 7 variables including Seebeck coefficients that have a major effect on performance were presented as a function of the temperature difference. The feasibility of the energy recovery performance of the developed TEG was verified from the maximum power output of 7.5W and conversion efficiency of 11.3%.

• Journal of Convergence for Information Technology
• /
• v.11 no.3
• /
• pp.34-45
• /
• 2021

The purpose of this study was to investigate the major selection motivation, academic stress, self-efficacy and college life adjustment and identify influencing factors of college life adjustment in the crisis situation of COVID-19. 243 nursing students were selected from 2 regions through convenience sampling. Data were analyzed through descriptive statistics, t-test, ANOVA, Scheffé test, Pearson's correlation coefficients and multiple linear regression analysis using SPSS for Windows Ver. 22.0. The higher the major selection motivation and self-efficacy, the higher the college life adjustment. The lower the academic stress, the higher the college life adjustment. The factors influencing college life adjustment were self-efficacy, major selection motivation, monthly allowance, and the explanatory power of these variables for college life adjustment was 65.6%. Therefore, in order to improve the nursing students' college life adjustment, it is necessary to develop and apply college life adjustment program to increase self-efficacy.

• Journal of Convergence for Information Technology
• /
• v.11 no.1
• /
• pp.54-61
• /
• 2021

This study aimed to understand the factors having effects on the satisfaction with clinical practice of nursing students. For the data collection, this study conducted a survey utilizing the questionnaire targeting 188 students(third & fourth year) of two nursing colleges located in a province, from September 1st to September 30th 2019. Using the SPSS WIN 21.0 Program for the data analysis, this study used the t-test, ANOVA, Scheffe test, Pearson correlation coefficient, and multiple regression analysis. In the results of this study, the satisfaction with clinical practice of nursing students had positive correlation with subjective happiness, and negative correlation with perceived stress. The factors having effects on the satisfaction with clinical practice were major satisfaction, gender, perceived stress, subjective happiness, and subjective health status, and the explanatory power of those variables was 21.9%. Based on such results of this study, it would be necessary to develop the complex educational programs considering the elements like decrease of perceived stress and improvement of subjective happiness at the same time, in order to improve the satisfaction with clinical practice.

• Journal of Convergence for Information Technology
• /
• v.10 no.12
• /
• pp.226-235
• /
• 2020

This study aimed to identify the integral factors influencing the attitudes of nursing students toward withdrawal of life-sustaining treatments. Methods: 139 nursing students were selected from the school of nursing of a single university. Questionnaires were used as measurement tools to measure their good death recognition, attitude towards death & towards withdrawal of life-sustaining treatment. The degree of good death recognition, attitude towards death & towards withdrawal of life-sustaining treatment were analyzed using descriptive statistics. Correlation between variables was analyzed using Pearson's correlation coefficient and factors influencing the attitude towards withdrawal of life-sustaining treatment using multiple linear regression. Results: Attitude towards withdrawal of life-sustaining treatment was significantly positively correlated with good death recognition(r=.312, p=.000). As a result of multiple linear regression, good death recognition significantly influenced (β=.312, p=.000), accounting for 8.5% of the variance in attitude towards withdrawal of life-sustaining treatment. Conclusions: The results from this study can be contribute to develop educational programs to foster positive attitudes towards withdrawal of life-sustaining treatment.

• Journal of Convergence for Information Technology
• /
• v.11 no.2
• /
• pp.73-81
• /
• 2021

The purpose of this study was to examine relationships among health empowerment and health behavior compliance on quality of life and identify the factors that influence on quality of life in patients with coronary artery disease. Participants in this study were 180 patients with coronary artery disease in the Intervention of Cardiology of a general hospital in S city. Data were analyzed using descriptive statistics, t-test, one-way ANOVA, Scheffe test, Pearson correlation coefficient, and multiple regression using the SPSS Win. 22.0 program. The result of the multiple regression indicates the health behavior compliance, gender, health empowerment and educational level predict 23.4%(F=5.17, p=.024) in quality of life. Therefore, it is necessary to develop programs a health behavior compliance and health empowerment use specific strategies to improve quality of life for patients with coronary artery disease.

• Nuclear Engineering and Technology
• /
• v.54 no.6
• /
• pp.2253-2261
• /
• 2022

In this study, nano-scaled shielding materials were assembled and fabricated by doping different weight percentages of Nano-mercuric oxide (N-HgO) into Nano-Bentonite (N-Bent) based on using (100-x% N-Bent + x% N-HgO, x = 10, 20, 30, and 40 wt %). The fabricated N-HgO/N-Bent nanocomposites were characterized by FT-IR, XRD, and SEM and evaluated to evaluate their shielding properties toward gamma radiation by using four different γ-ray energies form three point sources; 356 keV from ¹³³Ba, 662 keV from ¹³⁷Cs as well as 1173, and 1332 keV from ⁶⁰Co. The γ-rays mass attenuation coefficients were plotted as a function of the doped N-HgO concentrations into N-HgO/N-Bent nanocomposites. The computed values of mass attenuation coefficients (µ_m), effective atomic number (Z_eff) and electron density (N_el) by the as-prepared samples were found to increase, while the half value layer (HVL) and mean free path (MFP) were identified to decrease upon increasing the N-HgO contents. It was concluded also that the increase in N-HgO concentration led to a direct increase in the mass attenuation coefficient from 0.10 to 0.17 cm²/g at 356 keV and from 0.08 to 0.09 cm²/g at 662 keV. However, a slight increase was observed in the identified mass attenuation coefficients at (1172 and 1332 keV).

• Korea Journal of Hospital Management
• /
• v.27 no.2
• /
• pp.34-43
• /
• 2022

Objective: Telemedicine service is gaining importance in remote military areas. This study aimed to explore the mediating effect of user satisfaction on the association between military telemedicine service's quality and customer loyalty. Methods: The research data comprised the results of a satisfaction survey on 1,116 military telemedicine satisfaction surveys conducted from November 1 to November 31, 2021. T-tests and ANOVA were analyzed to confirm the difference in satisfaction and loyalty according to the general characteristics of the study subjects. User satisfaction, customer loyalty, and mediating effects were analyzed using multiple linear regression analysis. Results: Among the study subjects, 458 were affiliated with the Army, 68 with the Navy, and 36 with the Air Force. Among the quality of telemedicine service, tangibility, reliability, and empathy affected user satisfaction while reliability and empathy affected customer loyalty. Since the standardized coefficient beta of empathy was 0.150 (P=0.018), it was confirmed that it significantly affected customer loyalty by mediating user satisfaction. Conclusion: The telemedicine service's quality affects users' satisfaction and customer loyalty. Moreover, there was the mediating effect of user satisfaction on the association between telemedicine service and customer loyalty. Therefore, the reliability and reliability of the current telemedicine service can be improved through the replacement of outdated equipment and performance improvement, expansion of medicines in telemedicine units, and improvement of medical services through periodic CS education to increase the customers' satisfaction and loyalty.

• Journal of Convergence for Information Technology
• /
• v.11 no.7
• /
• pp.39-46
• /
• 2021

The purpose of this study was to investigate emotional labor, resilience and organizational commitment and to identify affecting factors of organizational commitment on hospital nurses. The subjects consisted of 180 general hospital nurse in the G city. The variables were measured using questionnaires, analyzed using t-test, ANOVA, Pearson's Correlation Coefficient and multiple regression analysis. The average score of emotional labor was 3.21±0.06, resilience was 3.32±0.48, and organizational commitment was 3.16±0.46. The factors influencing on organizational commitment were the satisfaction of the nursing job, total work experience, and resilience. The explanation of organizational commitment was 39%. These results suggest that it is necessary to develop promotion program and stratiges to improve nursing job satisfaction and resilience at the nursing organization and hospital level.

• Journal of Convergence for Information Technology
• /
• v.12 no.5
• /
• pp.21-31
• /
• 2022

This study attempted to identify factors affecting the clinical nurse's medication safety competence. Data collection was conducted with 154 nurses working in two tertiary general hospitals. Data were analyzed using by t-test, ANOVA, Pearson correlation coefficient, and stepwise multiple regression analysis with SPSS 26.0 program. As a result of the study, medication safety competence had a statistically significant correlation with problem-solving ability and self-efficacy. The factors influencing medication safety competences were in order of self-efficacy, problem-solving ability, work pattern, and current site work experience, which together accounted for 64.7% of the total variance. Therefore, in order to improve the clinical nurse's medication safety competences, prioritizing the development of a program to enhance self-efficacy and problem-solving ability is required.