• Journal of Convergence for Information Technology
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• v.11 no.2
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• pp.82-89
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• 2021

The objective of this study is to propose a new Glide Path that dynamically adjusts the risky asset inclusion ratio of the Target Date Fund by simultaneously considering the market's forecast volatility as well as the time of investor retirement, and to compare the investment performance with the traditional Target Date Fund. Forecasts of market volatility utilize historical volatility, time series model GARCH volatility, and the volatility index VKOSPI. The investment performance of the new dynamic Glide Path, which considers stock market volatility has been shown to be excellent during the analysis period from 2003 to 2020. In all three volatility prediction models, Sharpe Ratio, an investment performance indicator, is improved with higher returns and lower risks than traditional static Glide Path, which considers only retirement date. The empirical results of this study present the potential for the utilization of the suggested Glide Path in the Target Date Fund management industry as well as retirees.

• Exercise Science
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• v.26 no.3
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• pp.229-237
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• 2017

PURPOSE: This study was to investigate the Glycolysis mediated sarcoplasmic reticulum (SR) $Ca^{2+}$ signal regulates mitochondria $Ca^{2+}$ during skeletal muscle contraction by using glycolysis inhibitor. METHODS: To examine the effect of Glycolysis inhibitor on SR and mitochondria $Ca^{2+}$ content, we used skeletal muscle fiber from gastrocnemius muscle. 2-deoxy glucose and 3-bromo pyruvate used as glycolysis inhibitor, it applied to electrically stimulated muscle contraction experiment. Intracellular $Ca^{2+}$ content, SR, mitochondria $Ca^{2+}$ level and mitochondria membrane potential (MMP) was detected by confocal microscope. Mitochondrial energy metabolism related enzyme, citric acid synthase activity also examined for mitochondrial function during the muscle contraction. RESULTS: Treatment of 2-DG and 3BP decreased the muscle contraction induced SR $Ca^{2+}$ increase however the mitochondria $Ca^{2+}$ level was increased by treatment of inhibitors and showed and overloading as compared with the control group. Glycolysis inhibitor and thapsigargin treatment showed a significant decrease in MPP of skeletal muscle cells compared to the control group. CS activity significantly decreased after pretreatment of glycolysis inhibitor during skeletal muscle contraction. These results suggest that regulation of mitochondrial $Ca^{2+}$ levels by glycolysis is an important factor in mitochondrial energy production during skeletal muscle contraction CONCLUSIONS: These results suggest that mitochondria $Ca^{2+}$ level can be regulated by SR $Ca^{2+}$ level and glycolytic regulation of intraocular $Ca^{2+}$ signal play pivotal role in regulation of mitochondria energy metabolism during the muscle contraction.

• Journal of Convergence for Information Technology
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• v.11 no.6
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• pp.146-153
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• 2021

Recently, research on perovskite semiconductor materials has been performed, and the evaluation of properties using surface treatment for this material is the basis for subsequent studies. We studied the results of surface treatment of perovskite thin films exposed to air for about 6 months by generating oxygen plasma with an atmospheric pressure plasma equipment. The reason for exposure for 6 months is that the perovskite thin film is made of organic and inorganic substances, so when exposed to air, the surface changes through reaction with oxygen or water vapor. Therefore, this change is to investigate whether it is possible to restore the original film. The surface shape and the ratio of elements were analyzed by varying the process time from 1 s to 1200 s in an oxygen plasma atmosphere. It was found that the crystal grains change over a process time of 5 s or more. In order to maintain the properties of the deposited film, it is the optimal process condition between 2 s and 5 s.

• Journal of Convergence for Information Technology
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• v.11 no.6
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• pp.206-212
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• 2021

This study aimed to maximize the efficacy of Angelica gigas by finding a more effective way to extract active compounds from Angelica gigas. After extracting Angelica gigas by hydrothermal, ethanol, and supercritical carbon dioxide extraction methods, analysis of decursin and decursinol angelate content, quantification of total polyphenol content, and evaluation of efficacy of antioxidant, whitening, and antibacterial were conducted. The content of decursin and decursinol angelate was very high at 38.65% of the supercritical carbon dioxide extract, and the total polyphenol content was high in the order of hydrothermal extract, ethanol extract and supercritical carbon dioxide extract, but the difference was relatively small. The antioxidant effects were consistent with the total polyphenol content, and the antibacterial effects were consistent with the decursin and decursinol angelate content. In other words, through this study, we found that the optimal method for extracting active compounds from Angelica gigas is the supercritical carbon dioxide extraction method.

• Journal of Convergence for Information Technology
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• v.11 no.7
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• pp.118-127
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• 2021

This study aims to examine satisfaction of nursing students with online classes during first semester of 2020 after COVID-19 pandemic and the difference in satisfaction according to general and online-related characteristics. An online survey was conducted for all nursing students, and subsequently 627 responses were analyzed by t-test and ANOVA with SPSS WIN. Result reveals that students ability to use IT devices was above average, and most of them used laptop computers. Pre-recorded video lecture format was used the most, and improvement of online content was demanded the highest. Overall satisfaction with online classes was scored 3.0/5.0, with the highest satisfaction for anytime and anywhere learning, and the lowest satisfaction in recommending online classes to others. There were significant differences between self-evaluation on own grade, ability to use IT devices, format of online classes, and satisfaction about online classes. Through this study, it would be possible to suggest a plan to increase satisfaction of online class and basic data to establish university policy for online classes after COVID-19.

• Journal of Convergence for Information Technology
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• v.11 no.7
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• pp.288-297
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• 2021

The purpose of this study was to provide basic data for the development of end-of-life care program by analyzing the importance and performance of end-of-life care. Data were collected from 127 hospice team members currently working in hospice and palliative care units from six different university hospitals, general hospitals and hospice clinics. The data was collected throughout the time span of Dec. 1, 2020 to Feb. 15, 2021. Data were analyzed using descriptive statistics, t-tests, ANOVA, & IPA matrix. As a result of this study, 'physical care' and 'psychological care' were part of the first quadrant that requires maintenance and continuous enhancement. The 'spiritual care' appeared to be in the third quadrant area which entails long-term improvement. Based on the outcome of the study, it is evident that strategies are needed to continuously maintain and enhance physical and psychological care as well establish long-term plans for spiritual care when organizing the hospice team's end-of-life care performance training program.

• Journal of Convergence for Information Technology
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• v.11 no.7
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• pp.7-13
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• 2021

Recently, due to the many features and advantages of cloud computing, cloud service is being introduced to countless industries around the world at an unbelievably rapid pace. With the rapid increase in the introduction of multi-cloud based services, security vulnerabilities are increasing, and the risk of data leakage from cloud computing services are also expected to increase. Therefore, this study will propose an AWS Well-Architected based security architecture configuration method such as AWS standard security architecture, AWS shared security architecture model that can be applied for personal information security including cost effective of cloud services for better security in AWS cloud service. The AWS security architecture proposed in this study are expected to help many businesses and institutions that are hoping to establish a safe and reliable AWS cloud system.

• Journal of Convergence for Information Technology
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• v.11 no.7
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• pp.128-135
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• 2021

Although the comprehensive school report system which was renamed from the admission officer system has been stably implemented in Korea, the fairness of the college admission system concerning the evaluation on the extra-curricular domain has still been a controversial issue. Thus, it has been the main topic in the educational policy to consider the desirable college admission system and investigate the problems of current changes in the admission system. On the other hand, the college admission system has not been the problem for students and people concerned in Canada. The completion of higher education is more important than the admission itself in Canada due to the standardization of higher education institutions such as universities in quality. In this regard, this study aims to examine the education and college admission system in Canada in general focusing on the cases of the province of Quebec.

• Journal of Convergence for Information Technology
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• v.11 no.1
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• pp.199-207
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• 2021

This study was attempted to understand the effect of the violence victim experience of Korean adolescents on smoking using the data of the 15th (2019) online youth health behavior survey. The subjects of this study were 57,303 people, and the data were analyzed using the SPSS / Win 26.0 program for frequency analysis of complex samples, cross sample analysis (Rao-Scott ��2 test), and logistic regression analysis of complex samples. The main result was 12.7% of the smoking subjects. Those who smoked were significantly more 9.6% and 22.0%, respectively, compared to those who had no more than 1 or 2 times of violence. Smoking of Korean adolescents adjusted for gender, grade, academic record, economic status, drinking, family living, and usual stress increased the odds ratio for smoking by 1.66 times when the degree of violence damage experience increased by 1 unit. As a result of the above, as the degree of violence victimization of adolescents increases, the likelihood of smoking increases. Therefore, it is necessary to multidisciplinary convergence effort to the prevention and management of violence of adolescents, and to reduce the smoking of adolescents.

• Journal of Convergence for Information Technology
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• v.10 no.12
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• pp.49-57
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• 2020

The purpose of this study was to identify the effects of bullying observation experience and nursing professionalism on the major commitment in nursing students during clinical practice. The survey was performed on 195 nursing students in two universities. Data were collected using a structured questionnaires and analysed with t-test, ANOVA, Pearson's correlation and multiple regression. Study findings revealed that bullying observation experience(ß=-.13, t=-1.99, p=.048), nursing professionalism(ß=.20, t=2.99, p=.003) and school satisfaction(ß=.31, t=4.58, p=.000) about major commitment were significant predictive variables(F=11.60, p=.000). This variables accounted for 27.1% of the variance in major commitment. The findings indicate the necessity of developing educational programs to enhance nursing students's nursing professionalism and to prevent future bullying in nursing practice.