• The Korean Journal of Applied Statistics
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• v.35 no.2
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• pp.189-201
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• 2022

In this study, we propose factor augmentation to improve forecasting power of cryptocurrency return. We consider financial and economic variables as well as psychological aspect for possible factors. To be more specific, financial and economic factors are obtained by applying principal factor analysis. Psychological factor is summarized by news sentiment analysis. We also visualize such factors through impulse response analysis. In the modeling perspective, we consider ARIMAX as the classical model, and random forest and deep learning to accommodate nonlinear features. As a result, we show that factor augmentation reduces prediction error and the GRU performed the best amongst all models considered.

• Women's Health Nursing
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• v.28 no.3
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• pp.210-221
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• 2022

Purpose: The purpose of this study was to construct a hypothetical model based on Meleis and colleagues' Transition Theory and a literature review to explain women's menopausal transition, constructing a modified model considering previous studies and model fit and testing the effects between variables. Methods: With a correlational survey design, middle-aged Korean women aged 40 to 64 years who had experienced menopausal symptoms were recruited and filled out a self-administered study questionnaire. Measures included menopausal symptoms, resilience, social support, menopause management, menopause adaptation, and quality of life. The data were analyzed using SPSS 24.0 and AMOS 24.0. Results: The model fit indices were considered acceptable: 𝛘²/degree of freedom=2.93, standardized root mean residual=.07, comparative fit index=.90, and parsimonious normed fit index=.73. All eight direct-effect paths-from menopausal symptoms to support and adaptation, from support to adaptation and resilience, from resilience to adaptation and management, from management to quality of life, and from adaptation to quality of life-were significant. The explanatory power of the menopause transition model was 63.6%. Conclusion: Women who experience menopausal symptoms may be able to maintain and improve their quality of life if menopause management and menopause adaptation are successful through resilience and social support. Future research is needed to confirm whether strengthening facilitation as a nursing intervention strategy may promote healthy response patterns.

• Journal of Industrial Convergence
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• v.20 no.10
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• pp.103-111
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• 2022

The purpose of this study was to identify the influencing factors on aging anxiety by middle-aged men in rural areas during the COVID-19 pandemics. The design of this study was descriptive survey study. The participants were 180 middle-aged men aged 45 to 64 living in G province. Collected data were analyzed by descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient and multiple regression analysis with SPSS statistics 26.0 program. As a result of regression analysis, As a result of regression analysis, influencing factors on aging anxiety were stress(β=.10, p=.004), economic difficulties (β=.16, p=.007), COVID-19 psychological distress(β=.18, p=.003), family care burdens(β=.50, p<.001), and the explanatory power of the variables was 60.5%(F=55.93, p<.001). In the future, interventions are needed to manage aging anxiety and stress in middle-aged men, and support policies are needed to reduce psychological distress and overcome economic difficulties caused by COVID-19.

• The Journal of Korean Academic Society of Nursing Education
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• v.28 no.4
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• pp.411-420
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• 2022

Purpose: The purpose of this study was to identify the factors influencing nursing students' caring efficiency. Methods: This study included 212 nursing students from three University nursing departments in Busan metropolitan city. Data were collected from September 1 to September 29, 2021, using self-report questionnaires. For data analysis, descriptive statistics, independent t-test, one-way ANOVA, Pearson's correlation coefficient, and hierarchical multiple regression analyses were conducted with SPSS version 24.0. Results: Positive psychological capital and interpersonal competence on the relationship and character of nursing students were positively correlated with caring efficiency. The variables affecting the caring efficiency of the subjects were character (β=.60, p<.001), amount of participation in a character development program (5 times or more) (β=.16, p=.023), levels of stress (moderate β=.13, p=.037; low β=.15, p=.015), motivation to apply to a nursing program (β=.12, p=.024), and volunteer experience (β=.11, p=.038). The total explanatory power of the variables was 50.0% (F=14.69, p<.001). Conclusion: Character was one of the biggest influential factors on caring efficiency. In order to improve nursing students' caring efficiency, above all, it is necessary to make efforts to raise the level of individual character.

• Journal of Korean Clinical Nursing Research
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• v.15 no.2
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• pp.23-35
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• 2009

Purpose: The objectives of this study were to investigate the degrees of emotional labor and the effects of Type A personality, emotional expressiveness, job stress, and social support on the emotional labor among clinical nurses. Methods: The subjects of this study were the clinical nurses working at the general hospital in Seoul. The subjects were selected by quota sampling in consideration of the length of employment and the working units. The self-reported questionnaires were administered to 286 clinical nurses and the data were analyzed with SPSS 12.0 software Results: The level of emotional labor of the subjects was revealed moderate to high. Significant explanatory variables of the degrees of emotional labor included psychological job load, the lack of job autonomy, and role conflicts. These three variables demonstrated the explanatory power of 11.4% of the emotional labor. Conclusion: The findings suggested that the intervention program intervening emotional labor should be developed in order to improve psychological job load, the job autonomy, and role conflicts among clinical nurses.

• Journal of the Korean Applied Science and Technology
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• v.40 no.6
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• pp.1340-1349
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• 2023

Despite its profound impact on athletic performance, the significance of heart rate recovery (HRR) has been insufficiently addressed in the filed of sports science, particularly in the context of weightlifting characterized by brief and intense exertions involving heavy weights. Serving as a valuable indicator of autonomic nervous system and cardiovascular function, HRR assumes a pivotal role in weightlifting. This comprehensive review aims to delineate the specific demands for HRR in weightlifting, shedding light on the often overlooked cardiovascular considerations within training regimes focused on strength and power. The investigation scrutinizes the repercussions of HRR on weightlifting performance, seeking to elucidate how inadequate recovery intervals may result in physiological and psychological consequences. These consequences encompass a distorted perception of effort, disruption of coordination, compromised posture due to irregular breathing, and an overall decline in lifting capacity. The review systematically presents compelling evidence pertaining to heart rate response and recovery patterns during weightlifting, underscoring the critical importance of well-structured rest periods. Furthermore, the review delves into a comprehensive discussion of factors influencing HRR in weightlifting, encompassing variables such as sex, age, cardiovascular function, hydration, nutrition, and psychological aspects. Finally, a key emphasis is placed on the integration of effective HRR techniques into the training regimens of weightlifters, thereby ensuring sustained and optimized performance outcomes.

• Journal of Korean Society for Quality Management
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• v.51 no.4
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• pp.643-662
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• 2023

Purpose: The purpose of this study was to understand an individuals' COVID-19 vaccine acceptance intention during the peak of the pandemic by utilizing the coping theory and technology threat avoidance theory (TTAT) as a framework. Specifically, we focused on understanding how inward and outward emotion-focused coping (EFC), such as psychological distancing and emotional support seeking, affect problem-focused behavior (PFC), which is vaccine acceptance. Furthermore, we investigate how the individuals' cognitive appraisal to- ward COVID-19, consisted of perceived threat and perceived avoidability act as an antecedent of EFC. Methods: A PLS-SEM analysis was conducted to find the causal relation between the variables. An online survey was conducted targeting vaccination recipients on April, 2021. Participants were asked about their perception toward the virus, their coping strategy, and vaccine acceptance intention. A total of 186 valid samples were collected and used for the analysis. Furthermore, to analyze the out-of-sample predictive power of the research model and ensure the generalizability of the results, a PLSpredict analysis was conducted. Results: The results of the PLS-SEM analysis show that perceived threat toward COVID-19 significantly affect an individuals' EFC strategy. Furthermore, both types of inward EFC (psychological distancing, wishful thinking) negatively affected vaccine acceptance intention. On the other hand, emotional support seeking, which is a type of outward EFC, positively affected vaccine acceptance. The result of the PLSpredict analysis confirms the generalizability of the PLS-SEM result. Conclusion: The results of our study could be utilized to decrease vaccine hesitancy and prevent global pandemics by accelerating and increasing vaccination. Our study provides several meaningful implications to researchers and practitioners regarding vaccine acceptance and threat coping behavior.

• Convergence Security Journal
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• v.18 no.1
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• pp.117-128
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• 2018

The purpose of this paper is to analyze the behavior of North Korea's cyber attack against South Korea since 2009 based on major international security theories and suggest South Korea's policy option. For this purpose, this paper applied the behavioral domain and characteristics of 'cyber power' and 'coercion dynamics' model, which are attracting attention in international security studies. The types of cyber attacks from North Korea are classified into the following categories: power-based incarceration, leadership attacks and intrusions, military operations interference, and social anxiety and confusion. In terms of types and means of cyber power, North Korean GPS disturbance, the Ministry of Defense server hacking and EMP are hard power with high retaliation and threat and cyber money cashing and ransomware are analyzed by force in the act of persuasion and incentive in the point of robbing or asking for a large amount of money with software pawns. North Korea 's cyber attack has the character of escape from realistic sanctions based on the second nuclear test. It is important for South Korea to clearly recognize that the aggressive cyberpower of North Korea is changing in its methods and capabilities, and to ensure that North Korea's actions result in far greater losses than can be achieved. To do this, it is necessary to strengthen the cyber security and competence to simultaneously attack and defend through institutional supplement and new establishment such as cyber psychological warfare, EMP attack preparation, and enhancement of security expertise against hacking.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.4
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• pp.577-584
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• 2021

Electrical energy is an essential component in present societies, which is an important basis for our technological society. In the design of new power infrastructure, it is important to consider the psychological aspects of how our culture considers and aspects its development as an integral component of the community environment. The construction of new high voltage overhead transmission lines has become a controversial issue for public policy of government due to social opposition. The members of community are concerned about how these power lines may have an impact on their lives, basically caused by their effects on health and safety. The landscape and visual impact is one of the most impact that can be easily perceived for local community. The computer 3D simulation of new landscape is illustrated by a real life use corresponding to the selection of the power line route with least observability for local community. This paper used ArcGIS(geographic information system tool) for planning, survey, basic route and detailed route, route for implementation of transmission line corridor. Also, the paper showed the map of natural environment, living environment, safety and altitude using database of power line corridor, and transmission siting model was developed by this study. The suggested landscape of computer simulation with lowest visibility on a power line zone can contribute to reducing oppositions of local community and accelerating the construction of new power lines.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.10
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• pp.209-217
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• 2019

This is a descriptive research study undertaken to confirm the relationship between depression, fear-avoidance beliefs, catastrophizing, and the quality of life in the elderly with chronic pain, and how psychological factors affect their quality of life. The subjects were 147 seniors aged 65 years or older, who visited a neuropathy clinic in A city from March 4, 2019 to March 18, 2019. Statistical analysis was achieved by applying t-test, ANOVA, Pearson's correlation coefficients, and multiple regression analyses using the SPSS/WIN 22.0 software. Considering the demographic characteristics of the elderly, quality of life revealed significant differences with respect to age (F=3.464, p<0.001), the presence of the spouse (F=3.464, p<0.001), health condition (t=4.545, p<0.001), and pain degree (F=14.76, p<0.001). Further analysis revealed that factors affecting quality of life in the elderly with chronic pain are depression (${\beta}=-0.25$, p<0.001), pain degree (${\beta}=0.25$, p<0.001), catastrophizing (${\beta}=-0.28,$p<0.001) and health condition $({\beta}=-0.19$, p<0.001), with a total explanation power of 49%. Hence, researches on the negative psychological factors, such as depression and catastrophizing, are required to improve the quality of life for the elderly. In addition, the development of a systematic nursing arbitration program is necessary to positively recognize active pain control and health conditions.