• Journal of Digital Convergence
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• v.16 no.11
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• pp.221-230
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• 2018

Most of researchers and business futurists agree that traditional organizational designs are inadequate for coping with today's turbulent and increasingly networked world. Executives in small firms find that their organizations must tap into an extended network of partners to achieve the scale and power needed to succeed in industries dominated by large, global firms. As they attempt to build lean yet agile businesses, these executives are finding that they no longer rely on gut instinct alone. Neither can they simply copy organizational model that worked in the past. They must understand how organizational design choices influence operational efficiency and flexibility and, even more important, how to best align the organization with the environment and the strategy chosen to quickly and effectively sense and respond to opportunities and threats This research examines the capabilities required to build businesses that can survive and prosper in today's fast-faced and uncertain environment. The insights presented in this research have emerged from over 30 years of work with hundreds of executives and entrepreneurs as they struggled to build businesses that could cope with the demands of a rapidly changing, networked global economy. The insights from this research suggest that IT is an important enabler for developing the best capabilities required for success.

• Journal of Digital Convergence
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• v.16 no.12
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• pp.489-503
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• 2018

The purpose of this study was to explore traumatic experiences and posttraumatic growth of nursing students who were in clinical training. The data were collected from 490 nursing students at four nursing colleges with clinical training experience more than 1 year, from November 20th 2017 to December 20th. Collected data were analyzed through t-test, ANOVA, and $Scheff{\acute{e}}$ test with the SPSS/WIN 25.0 program, and qualitative data were analyzed by content analysis. 26.5% of the subjects had traumatic experiences in their daily life, 61.2% in the clinical practice. Their posttraumatic growth was scored 2.63 out of 5 on average. The contents of traumatic experiences were 'Violence experienced by medical staff','Negative perception of nursing care','Non-Educational Practical Environment' Clinical practice in a harsh environment, Witness of a serious patient, et al. The findings can be used as important basic data for the development of nursing practice education program for encouraging the posttraumatic growth of nursing students.

• Journal of Digital Convergence
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• v.16 no.12
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• pp.77-86
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• 2018

This study was carried out by using the concentration index calculation method from 1996 to 2016 by using the household trend survey data to confirm the difference of income transfer income and inequality in public transfer income. The main results are as follows. First, the public transfer income concentration index in 1996 was concentrated on the high income group with +0.2774, but since 2009, the concentration index has been negative (-), which has concentrated on the low income group. However, the effect of redistribution of income was small. Second, the average public transfer income of low - income households increased significantly while the number of high income earners decreased. It is gradually improving that public transfer income did not play a role in the improvement of income inequality. Third, public transfer income has been continuously increasing in all income classes, and the rate of increase is low in the low income class and slow in the high income class, so the public transfer income of the low income class is higher than that of the high income class. In sum, the inequality of public transfer income by income class in Korea is gradually improving, but it is not considered to be a level that can improve the inequality between income groups.

• Journal of Digital Convergence
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• v.17 no.8
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• pp.37-46
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• 2019

The purpose of this study is to explore the effects of the use of artificial intelligence chatbots on improving Korean college students' English grammar skills. 70 undergraduate students participated in the present study. They were taking a General English class offered by a university in Korea. There were two groups in this study. Participants in the chatbot group consisted of 36 students while those in the human group were 34. Over 16 weeks, the chatbot group engaged in ten chat sessions with a chatbot while the human group had a chat with a human chat partner. Both pre- and post-tests were performed to examine changes in the participants' grammar skills over time. To compare the improvement between the two groups, an independent t-test was then run. Main findings are as follows: First, participants in both groups significantly improved their English grammar skills, indicating the beneficial effects of engaging in chat. Also, there was a statistically significant difference in the improvement between the chatbot and human groups, indicating the superior effects of the chatbot use. This study confirmed the improved grammar skills by the participants in the chatbot group, comparison with those in the human group. Based on these findings, suggestions for the future chatbot study are discussed.

• Journal of Digital Convergence
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• v.17 no.8
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• pp.265-270
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• 2019

Growing evidence suggests that mediating apoptotic cell death of ER stress plays an important role in pathological development of neurodegenerative diseases including Alzheimer's disease. The ethanol extract of Rodiola sacra (ERS) investigates whether ER stress protects neuroinvasive neuro-2A cells from homocysteine (Hcy) cell death and ER stress. In neuronal cells, Hcy markedly decreased the viability of the cells and induced the death of Annexin V-positive cells as confirmed by MTT assay. The Hcy cell viability and apoptotic loss pretreated with ERS were attenuated, and Hcy showed stress in the expression of C / EBP homologous protein, 78-kDa glucose regulatory protein and the junction of X-box binding protein-1 (xbp1) mRNA. ESR decreased Hcy-induced mRNA binding, GRP78 and CHOP cells induced Hcy-induced ER stress and apoptosis, and Western blotting revealed expression of heme oxygenase-1 and HO-1 enzyme activity Inhibition is indicative of therapeutic value for neurodegenerative diseases such as decreased cell death by hemin.

• Journal of Digital Convergence
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• v.17 no.8
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• pp.357-365
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• 2019

This study was conducted to identify correlations in clinical nurses' personality, resilience and happiness index to provide basic resources for nurses' happiness at work. Methods: From May 1 to 15, 2019, self-report questionnaires were distributed and collected from 307 of clinical nurses in 10 hospitals located in P-metropolitan city and K-province. Analyses included descriptive statistics, t-test, Analysis of Variance, Pearson's correlation coefficient, and multiple regression, conducted using IBM SPSS/WIN 24.0. Mean scores were nurses' personality 3.67, resilience 3.28, and happiness index 3.28. There were significant differences on the happiness index for: clinical experience, type of work, and leisure activities and a positive correlation between personality and resilience, between personality and happiness index and between happiness index and resilience. Happiness index was influenced by clinical experience 'Less than 1-5' (${\beta}=-.41$), '${\geq}10$' ${\beta}=-.39$), 'Less than 5-10' (${\beta}=-.34$), resilience (${\beta}=.35$), personality (${\beta}=.29$), type of work '3 shifts' (${\beta}=.12$), leisure activities (${\beta}=.10$). Explanatory power of these variables was 41%. Conclusion: Based on the findings of this study, so it is necessary to operated the career management, work management, personality training, support for resilience promotion program and leisure activities in order to increase the happiness index of hospital nurses.

• Journal of Digital Convergence
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• v.17 no.8
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• pp.229-235
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• 2019

As the demand for broadband multimedia including the Internet explosively increases, the advancement of the subscriber network is becoming the biggest issue in the telecommunication industry due to the surge of data traffic caused by the emergence of new services such as smart phone, IPTV, VoIP, VOD and cloud services. In this paper, we have developed WDM(Wavelength Division Multiplexing)-PON(passive optical network) based on the 1-Gigabit Reach Externder (RE) technique to reduce optical core. Particularly, in order to strengthen the market competitiveness, we considered low cost, miniaturization, integration technique, and low power of optical parts. In addition, we have developed a batch system by integrating all techniques for reliability, remote management through the development of transmission distance extension and development of capacity increase of optical line by using RE technology in existing PON network. Based on system interworking with existing commercial 1G PON devices, it can be worthy of achievement of wide nationalization and optical core reduction by using this developed system. Based on these results, we are studying development of 10G PON technology.

• Journal of Digital Convergence
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• v.17 no.9
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• pp.421-428
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• 2019

This study includes services that require six professional guides - health care, exhibition performance, restaurant, shopping, business and daily life - as well as a trip-based tour, along with solving existing problems that may occur on domestic and overseas trips, and proposes services that connect users with proven professional guides. As a result of previous research, the most needed services among overseas travel were air tickets, accommodation, transportation, and guides, but as Korea enters an aging society, professional guide services are expected to increase daily demand. Based on this, the service technology, user scenarios and brand development were presented. This Service Proposal provides users with a personalized guide to knowledge or experience that they have not previously known, providing them with a wealth of experience. In addition, guides can help develop new fields of expertise and help improve professional guides' capabilities. Finally, the platform service is meaningful in that it enables the creation of jobs by enabling everyone to engage in economic activities, as it allows users to provide services through their own capabilities while at the same time being convenient for them.

• Journal of Digital Convergence
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• v.17 no.8
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• pp.249-255
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• 2019

Type 2 diabetes mellitus(T2DM) is included in metabolic disorders characterized by hyperglycemia, which causes many complications, and requires long-term treatment resulting in massive medical expenses each year. There have been many studies to solve this problem, but the existing studies have not been accurate by learning and predicting the data at specific time point. Thus, this study proposed a model using RNN to increase the accuracy of prediction of T2DM. This work propose a T2DM prediction model based on Korean Genome and Epidemiology study(Ansan, Anseong Korea). We trained all of the data over time to create prediction model of diabetes. To verify the results of the prediction model, we compared the accuracy with the existing machine learning methods, LR, k-NN, and SVM. Proposed prediction model accuracy was 0.92 and the AUC was 0.92, which were higher than the other. Therefore predicting the onset of T2DM by using the proposed diabetes prediction model in this study, it could lead to healthier lifestyle and hyperglycemic control resulting in lower risk of diabetes by alerted diabetes occurrence.

• Journal of the Korea Convergence Society
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• v.10 no.9
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• pp.55-61
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• 2019

The purpose of this study was to investigate the correlation between the hand dexterity and grip strength of 8-10 year elementary school children and 20-24 year college students. This study was conducted on 77 elementary school children aged 8-10 years old and 50 college students aged 20-24 years. The chopsticks manipulation test (CMT) and dymanomenter were used to evaluated hand dexterity and grip strength. In this study, the correlation between hand dexterity and grip strength, and the age, hand dexterity and grip strength of the subjects were compared. hand dexterity between 8-10 year old and 20-24 year old students were statistically different between 8 and 9 year olds, and the control was between 8 and 20-24 year old students. There were statistically significant differences. In addition, in the correlation between age, hand dexterity and grip strength, age and grip strength were positively correlated, and age and hand dexterity were negatively correlated. These results may contribute to the development of children's hand function and the fusion approach.