• Journal of the Korea institute for structural maintenance and inspection
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• v.24 no.5
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• pp.119-125
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• 2020

Research on high-attenuation concrete for the vibration reduction performance by mixing epoxy-based synthetic resins and aggregates is actively being conducted. The curing time of high-attenuation concrete is very short because water is not used, and the physical and dynamic properties are very excellent. therefore, it is expected to be widely used in building structures requiring reduction of interior-floor noise and vibration. Furthermore, A way to expand the applicability of the high-damping concrete mixed with polymer in the field of reinforcement material have been variously studied. In order to replace polymer concrete with ordirnary concrete and existing anti-vibration reinforcement material, it is necessary to review overall vibration reduction performance considering physical properties, dynamic properties, productivity and field applicability. In this study, the physical and dynamic properties of polymer concrete by epoxy mixing ratio compared with ordirnary concrete. As a result, the elastic modulus was similar. On the other hand, polymer concrete for the compressive, tensile, and flexural strengths was quite more excellent. In particular, the measured tensile strength of polymer concrete was 4-10 times higher than that of ordirnary concrete. it was a big difference, and the frequency response function and damping ratio was studied through modal test and finite element analysis model. The dynamic stiffness of polymer concrete was 20% greater than that of ordirnary concrete, and the damping ratio of polymer concrete was approximately 3 times more than that of ordirnary concrete.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.2
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• pp.440-451
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• 2021

The purpose of this study is to develop and validate the parental roles and responsibilities for young children. A survey was conducted on 301 parents with children attending preschools. The parental roles and responsibilities scale were determined from a total of 60 items and 11 sub-factors based on the criteria for goodness, validity, and reliability of items (i.e., factor load ≥ 0.5; AVE ≥ 0.5; CR ≥ 0.7; Cronbach's alpha ≥ 0.7). The parental roles and responsibilities scale include 'hygiene management' (4 items), 'physical activities' (6 items), 'survival and health care' (6 items), 'cognitive development' (5 items), 'emotional stability' (5 items), 'social skills' (6 items), 'social norms and values' (7 items), 'physical environment' (5 items), 'protection' (5 items), 'family community consciousness and family tradition' (4 items), and 'the role and responsibility of parents for childcare institutions' (7 items). It is significant that the indicators on the parental roles and responsibilities for young children were developed and verified to fit the situation in Korea. Findings will help identify the characteristics of parental role responsibilities and serve as a basis for efficient communication between parents and preschoolers.parental role responsibilities and serve as a basis for efficient communication between parents and preschools.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.2
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• pp.148-159
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• 2021

The purpose of this study was to investigate the influence of critical thinking disposition and communication competence on the problem-solving confidence satisfaction of nursing students. The data was collected using questionnaires completed by 215 nursing students in G city from November 1 to November 30, 2019. Data was analyzed using SPSS version 22.0. The data analysis showed that the mean score for critical thinking disposition was 3.69±0.37, communication competence 3.72±0.46, and problem-solving confidence 3.56±0.41. There was a significant positive correlation between critical thinking disposition and communication competence (r=.588, p<.001). critical thinking disposition and problem-solving confidence (r=.462, p<.001), communication competence, and problem-solving confidence (r=.255, p<.001). As per the regression analysis, the factors that affect problem-solving confidence were academic achievement, critical thinking disposition, the motive for selecting nursing science, and gender with an explanatory power of about 33.8%. Conclusions: This study showed that problem-solving confidence correlated with critical thinking disposition and communication competence. Therefore, to increase the critical thinking disposition and communication competence and thus enhance the problem-solving confidence of nursing students, it is necessary to develop and apply appropriate teaching methods and non-contact education programs.

• The Journal of the Convergence on Culture Technology
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• v.7 no.1
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• pp.17-23
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• 2021

Social media users are an important part of our lives as they spend a lot of time and actively use them. However, it is known that there are many users who feel the psychological stress of SNS stress or fall into addiction due to SNS use. SNS stress negatively affects not only the user's mind but also the body. This study investigates the associations between SNS stress and addiction. To test the hypotheses, the study performed structural equation modeling using Amos. We collected 210 data from SNS users. The empirical results showed that SNS overuse had a significant effect on SNS stress. Second, SNS stress had a significant relationship with SNS addiction. Third, it was found that SNS overuse did not directly affect SNS addiction. This study suggests that it is necessary to recognize the importance of the relationship between SNS addiction and SNS stress.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.12
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• pp.261-267
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• 2020

The demand for faster, lighter, and thinner portable electronic devices has brought about a change in semiconductor packaging technology. In response, a stacked chip-scale package(SCSP) is used widely in the assembly industry. One of the key materials for SCSP is a die-attach film (DAF). Excellent flowability is needed for DAF for successful die attachment without voids. For DAF with high flowability, two-step curing is often required to reduce a cure crack, but one-step curing is needed to reduce the processing time. In this study, DAF composition was categorized into three groups: cure (epoxy resins), soft (rubbers), hard (phenoxy resin, silica) component. The effect of the composition on a cure crack was examined when one-step curing was applied. The die-attach void and flowability were also assessed. The cure crack decreased as the amount of hard components decreased. Die-attach voids also decreased as the amount of hard components decreased. Moreover, the decrease in cure component became important when the amount of hard component was small. The flowability was evaluated using high-temperature storage modulus and bleed-out. A decrease in the amount of hard components was critical for the low storage modulus at 100℃. An increase in cure component and a decrease in hard component were important for the high bleed-out at 120℃(BL-120).

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.12
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• pp.377-386
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• 2020

The image of beauty professionals who have wide contact with consumers is an important factor that can increase satisfaction and loyalty in consumers by exerting a positive influence on them. The purpose of this study is to investigate the influence of, and relationships among, self-esteem, positive thinking, and job commitment on image-making efficacy in beauty professionals. The method and scope of this study were carried out by theoretical research related to image-making efficacy, positive thinking, self-esteem, job engagement, and survey research with beauty professionals located in Seoul and the Gyeonggi-do area. We used SPSS v. 23.0 and Amos v. 23.0 to analyze demographic characteristics, the coefficient of internal consistency of the survey items, descriptive statistics, Pearson's correlation, and the Sobel Test. The results of the study show that the image-making efficacy of beauty professionals had a positive (+) effect on self-esteem, positive thinking, and job commitment. Second, self-esteem in beauty professionals was found to exert a positive effect (+) on their positive thinking and job commitment. Third, positive thinking by beauty professionals contributed to a positive effect (+) on job commitment. Fourth, the study found that self-esteem and positive thinking mediated the relationship between beauty professionals' image-making efficacy and job commitment.

• The Journal of the Korea Contents Association
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• v.21 no.3
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• pp.244-257
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• 2021

The purpose of the present study is to qualitatively explore childcare teachers' attitudes toward gender sensitivity education for early childhood. The study recruited 227 teachers and directors working in childcare centers around the Seoul metropolitan areas. The study utilised the interpretive science paradigm and visual methods for data collection, and thematic analysis examined the attitudes of 227 participants. Gender sensitivity education include gender flexibility and sexual orientation. Most participants showed positive attitudes toward the gender flexibility education. They regarded the gender flexibility as a topic socially accepted, suitable for early childhood development, and easy to implement. They also believed that the gender flexibility education would encourage the individuality of children. On the other hand, 53.3% of participants showed negative attitudes toward tolerance education regarding sexual orientation. Opponents expressed that an issue of sexual orientation did not reach a social consensus. They also worried that the topic is not developmentally appropriate for early childhood, and difficult to teach young children because of insufficient educational materials. At the same time, 40.5% of participants expected Korean society would embrace diverse sexual orientations in the future, and early childhood education would help young children adapted to changing contexts. This study discussed theoretical concepts of gender sensitivity, listened to childcare teachers' voices about education of gender flexibility and sexual orientation, and suggested more appropriate gender sensitivity education for early childhood.

• Journal of the Korean Applied Science and Technology
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• v.37 no.6
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• pp.1528-1534
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• 2020

This study examines the trends of the domestic age-friendly industry, examines the ingredients notified by the Ministry of Food and Drug Safety of aging cosmetics, and analyzes the research trends of raw materials other than the notices, and prepares data for the aged-friendly industry to quickly cope with changes in the cosmetics industry environment and aging people. I wanted to. In addition to the ingredients notified by the Ministry of Food and Drug Safety, research trends on the development of ingredients for anti-aging cosmetics are examined, and the anti-aging effects of each ingredient are examined. Through this, 'aging' and 'cosmetics', 'Anti-Aging', 'Anti-Aging', etc. In order to lead the development of anti-aging cosmetics related to the aging industry, research activities on products that are effective in preventing aging by strengthening the skin in addition to the four ingredients notified by the Ministry of Food and Drug Safety are constantly being conducted. In the functional cosmetics field notified by the Minister of Food and Drug Safety, it is believed that various basic research activities should be conducted so that research on anti-aging can be scientifically supported rather than a single research.

• Journal of the Korea Convergence Society
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• v.12 no.3
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• pp.177-186
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• 2021

The 2015 revised curriculum is structured around the core competencies of the 21st century, this is in line with the world's flow of education, such as OECD Education 2030. A future practical leading model was studied to provide a variety of creative teaching and learning experiences to elementary and Secondary students using intelligent information technology to cultivate core competencies such as ICT and computing thinking. In order for this practical model to stably settle the school field, the training was planned and operated to strengthen the creative convergence education capacity required by the teachers at the unit school through various types of the training. In particular, a nationwide administrators training program was operated for three years, reflecting the new curriculum, teaching and learning methods, and evaluation that can lead to future convergence talent training. In this paper, the perception of creative convergence education was investigated and analyzed considering the influence that administrators may have on the school field. Based on this, through the three-year operation results of the training, it was intended to establish a new training method for stable access to future creative convergence education under the post-corona era's social issues.

• Journal of Digital Convergence
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• v.19 no.2
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• pp.447-456
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• 2021

This study analyzed 28 domestic and foreign studies related Prompts for Restructuring Oral Muscular Phonetic Targets treatment techniques from 1984 to 2020 to prepare basic data for the development of PROMPT intervention programs and examination tools. According to the analysis, continuous research has been conducted since 1984 when the prompt study was first started, and the method of research was 16 intervention studies, with the highest number of speech disorders, and the target age being 3 to 5 years old, the most frequently conducted for infancy. The treatment was the most frequent in the 16th sessions, and the activities were based on the Motor Speech Hierarchy(MSH), except for the subjects of the non-verbal autism spectrum disorder. According to the analysis of the dependent variables, 'speech production' was the most common, followed by 'speech motor control', 'articulation', and 'speech intelligibility' were highest. Combined with all these studies, it suggests that PROMPT, which are directly useful for exercise spoken word production, are effectively being used outside the country and that it is necessary to develop a PROMPT program that can be applied domestically, in Korea.