• Journal of the Korean Electrochemical Society
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• v.25 no.4
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• pp.184-190
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• 2022

Spinel LiMn₂O₄ (LMO) and layered LiNi_0.5Co_0.2Mn_0.3O₂ (NCM) are widely used as positive electrode materials for lithium-ion batteries. LMO and NCM positive electrode materials have a complementary properties. LMO has low cost and high safety and NCM materials show a relatively high specific capacity and better cycle life even at elevated temperature. Therefore, the LMO and NCM active materials are blended and used as a positive electrode in large-size batteries for electric vehicles (xEV). In this study, the cycle performance of a blended electrode prepared by simply mixing LMO and NCM and a bi-layer electrode in which two electrode layers aree sequentially coated are compared. The bi-layer electrode prepared by composing the same ratio of both active materials has similar capacity and cycle performance to the blend electrode. However, the LN electrode coated with LMO first and then NCM is the best in the full cell cycle performance at elevated temperature, and the NL electrode, in which NCM is first coated with LMO has a faster capacity degradation than the blended electrode because LMO is mainly located on the top of the electrode adjacent to electrolyte and graphite negative electrode. Also, the LSTA (linear sweep thermmametry) analysis results show that the LN bi-layer electrode in which the LMO is located inside the electrode has good thermal stability.

• Journal of Digital Convergence
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• v.20 no.5
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• pp.713-720
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• 2022

The objective of this study is to provide the basic data for the development of educational programs for the prevention of infectious diseases targeting the elderly by researching the degree of personal hygiene practice, perceived risk of infection, and knowledge and importance of infectious diseases for the prevention of infectious diseases of the elderly. Using the structured questionnaire for a month of October in 2021, this study surveyed total 110 elderly people in their 65 or up by using the one-to-one individual interview method through the Gallup Korea. The collected data was analyzed by using the IBM SPSS Statistics 25.0 Program. In the results of analyzing the ranking by converting it into Borich's needs formula and then totaling up the degree of importance and knowledge, it was researched as the 1^st place for the transmission path of infectious diseases, the 2^nd place for the preventive method of infectious diseases, the 3^rd place for the treatment method of infectious diseases, the 4^th place for the handling procedure in case an infectious disease was doubted and confirmed, and the 5^th place for the major symptoms of infectious diseases. The results of this study could contribute to the improvement of infection preventive practice through the provision of proper information to subjects, by providing the basic data for the development of educational programs for the elderly reflecting the needs of prevention and management of infectious diseases.

• Journal of Digital Convergence
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• v.20 no.5
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• pp.877-884
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• 2022

This study was attempted to investigate the effects of psychological safety and physical self-concept on ego-resilience of nursing students. This data collected from September to November 2021 through a structured questionnaire from 166 nursing students at M University in Jeolla Southern Province. For data processing, descriptive statistics, t-test, ANOVA, Scheffe test, Pearson's correlation analysis, and multiple regression analysis were performed using the SPSS 23.0 program. As a result of this study, there were significant positive correlations in the self-resilience of nursing students with psychological stability and physical self-concept(r=.480, p<.001, r=.426, p<.001). The factors affecting the ego-resilience of nursing students were psychological safety(β=0.352, p<.001) and physical self-concept (β=0.236, p<.001), and the explanatory power was 26%. As a result of this study, it is necessary to increase psychological safety and physical self-concept in order to increase the ego-resilience of nursing students. It is necessary to develop and apply guide programs that enhances psychological stability for nursing students, and to provide education and facilities so that they can have a healthy body and mind, not only academics.

• Journal of Industrial Convergence
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• v.20 no.2
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• pp.61-70
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• 2022

The study developed a psychiatric and mental health nursing practice program based on blended learning as nursing students' field practice in psychiatric and mental nursing practice was limited due to the prolonged COVID-19 pandemic. This is a study to evaluate the effect on communication competency, self-efficacy for group work, and learning transfer motivation through a psychiatric and mental health nursing practice program based on blended learning. From October 18, 2021 to December 11, 2021, 64 nursing students participated in the study using a structured Google questionnaire. The collected data was analyzed by descriptive statistics and paired t-test using the SPSS 25.0 program. As a result of the study, based on blended learning, the subjects' communication competency, self-efficacy for group work, and learning transfer motivation were significantly increased after compared to before psychiatric and mental health nursing practice education. Through the results of this study, it was possible to confirm the effect of the psychiatric and mental health nursing practice program based on blended learning.

• Journal of Korean Elementary Science Education
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• v.41 no.1
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• pp.44-64
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• 2022

This study explored the elementary school teachers' experiences while teaching students with low achievement in science based on the grounded theory. In-depth interviews and analysis were conducted on 13 teachers with experiences in teaching students with low achievement in science within the last three years and more than five years of field experience until the theoretical saturation of data on the teaching experiences for students with low achievement in science. The analysis results were as follows. First, the teaching experiences of elementary school teachers for underachievers in science were classified into 119 concepts, 41 subcategories, and 17 categories. Based on the paradigm model, the categories were structured and presented as causal conditions, contextual conditions, intervening conditions, action/interaction strategies and consequences based on the central phenomenon of 'difficulty in teaching students with low achievement in science'. Second, the core category of elementary school teachers' teaching underachievers in science was assumed to be 'overcoming difficulties and teaching underachievers in science'. And according to the properties and dimensions of the core category, teachers who teaching students with low achievement in science were divided into four types: 'compromising-', 'overcoming-', 'accepting-', and 'conflicting-reality type'. Third, a conditional matrix was presented to summarize and integrate the results of this study by classifying the teaching experience of elementary school teachers for underachievers in science into educational providers and educational demanders. On the basis of these findings, educational implications for teaching students with low achievement in science were discussed.

• Journal of Science Education
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• v.45 no.3
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• pp.364-378
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• 2021

This study explores the perception of Engineering Design of teachers who have long experience in the Integrated STEAM education. The teachers participating in this study were 12 elementary and secondary teachers with more than five years of experience in the Integrated STEAM Education. The study conducted semi-structured interviews. Interview questions focused on experiences of Integrated STEAM Education and recognition of Engineering Design, whether or not to reflect the curriculum of Engineering Design, and actual cases of Integrated STEAM Education with Engineering Design. As a result of this study, the teachers who participated in this study recognized that 'identification and coexistence of concepts for science, technology, and engineering' about Engineering Design, 'Creative design is possible when creativity is added to Engineering Design', 'Engineering Design is to analyze the economic feasibility and utility of the output created through the creative design process', 'Engineering Design is only for students who choose a career in science and engineering'. Based on this research, We need to establish and present correct concepts for science, technology, and engineering, and make an effort to include Engineering Design for solving scientific problems in the curriculum. In addition, we will have to develop and spread the Integrated STEAM Education program including Engineering Design and apply it in the field. Through this, we will have to find concrete action plans to improve the perception of science and engineering Integrated STEAM programs and Engineering Design among novice teachers and preservice teachers.

• Journal of the Korea Convergence Society
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• v.13 no.5
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• pp.295-305
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• 2022

This study aimed to present a realistic policy direction to reduce human rights violations by analyzing the mechanisms of its factors affecting the experience of human rights violations for middle and high school student athletes. The method analyzed the response data of 13,205 student athletes through a structured questionnaire using logistic regression analysis. The independent variable consisted of sexual violence, sexual shame, physical violence, verbal violence, bullying, invasion of privacy and learning rights, and unfair leaders' actions related to exercise. As a result of the analysis, first, the team atmosphere, human rights consciousness in their sports and in the sports field were found to have a significant influence on physical and language violence, bullying, privacy and infringement of learning rights. Second, for the experience of sexual violence, the team atmosphere and the level of awareness of human rights violations in the sports community had a significant effect, but the permission of violence in the sports community and human rights consciousness in their sports did not appear as meaningful variables. Third, it was found that the unfair experience related to exercise had a significant effect on the team atmosphere, the overall level of violence in the sports community, and the its awareness of human rights violations in the sports community.

• Smart Media Journal
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• v.11 no.6
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• pp.37-50
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• 2022

This proposes a direction to build and provide an exhibition space based on the metaverse platform so that artists can independently open their own exhibitions in an online environment. Although many artists are produced every year, offline exhibitions are becoming difficult due to not many art galleries, and offline exhibitions are becoming impossible due to Corona, which began at the end of 2019, and online exhibitions are emerging as an alternative. We analyze cases of existing online exhibition methods and visit online exhibition methods such as web, video, and virtual reality and metaverse environment then present a plan for individual exhibitions in consideration of the recent metaverse environment. The proposed metaverse-based personal exhibition method is structured so that artists can construct a space on the metaverse and place their works, and then viewers can freely take a look on it from a remote location. Based on the proposed exhibition direction, the representative metaverse platform was applied to confirm the characteristics and possibilities of exhibition space and composition of works and users' exhibition experience. In the face of the rise of online exhibitions, space can be constructed in the direction the artist pursues in online exhibitions as well as offline exhibitions, but also online exhibitions, and hopes that online exhibitions will become another genre of exhibitions rather than incidental after the end of Covid-19.

• Korean Journal of Culture and Social Issue
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• v.27 no.4
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• pp.351-389
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• 2021

This qualitative study aimed to develop a structural framework that explains the process of psychological adaptation and sequential changes being perceived by Korean people under the COVID-19 Pandemic past year. Setting a tentative analysis frame induced from antecedent literatures about psychological phenomena during the COVID-19 pandemic, the qualitative data were collected from 6 Korean adults by semi structured individual interviews. For the data, content analysis applied from the grounded theory were performed. As a result, the initial framework was extended and revised to describe the psychological phenomena under the pandemic. This paradigm structure includes the process of 'causal factors ⇒ psychological main phenomena ⇒ sequential results' being intervened by personal contextual situations and psychological characteristics, as moderators. The category of causal factors were the COVID-19 pandemic, relevant critical incidents, and social distancing policy. The main phenomena reflected either positive, negative, or complicated experiences. The sequential psychological results included transformation of cognitive system or behavior patterns. Various variables such as psychological sense of community and social responsibility, psychological capability for leisure, and positive psychological capital were found out as moderating factors. In discussion and conclusion, theoretical/practical implications of the results and direction to study in the future were suggested.

• The Mathematical Education
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• v.61 no.3
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• pp.477-497
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• 2022

The rapidly changing world calls for reform in mathematics education from lifelong learning perspectives. This study examines adults' perception of mathematics by reflecting on their experiences of mathematics in and out of school in order to understand what the current needs of adults are. With the two questions: "what experiences do participants have during their learning of mathematics in schools?" and "how do they perceive mathematics in their current life?", we analyzed the semi-structured interviews with 10 adults who have different sociocultural backgrounds using narrative inquiry methodology. As a result, participants tended to accept school mathematics as simply a technique for solving computational problems, and when they had not known the usefulness of mathematical knowledge, they experienced frustration with mathematics in the process of learning mathematics. After formal education, participants recognized mathematics as the basic computation skill inherent in everyday life, the furniture of their mind, and the ability to efficiently express, think, and judge various situations and solve problems. Results show that adults internalized school education to clearly understand the role of mathematics in their lives, and they were using mathematics efficiently in their lives. Accordingly, there was a need to see school education and adult education on a continuum, and the need to conceptualize the mathematical abilities required for adults as mathematical literacy.