• Journal of the Korean Society of Manufacturing Process Engineers
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• v.21 no.7
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• pp.91-97
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• 2022

Pipes transport and supply fuel in various categories; however, corrosion occurs because of the external environment, impurities are mixed in the fuel, and substances leak to the outside, which can lead to serious accidents. Therefore, in this study, inspection equipment using a laser scanner was manufactured to classify conditions according to the degree of corrosion of the outer wall of the pipe, and the corrosion height and maximum value of the pipe were obtained from the surface information. Using the k-means method, it was classified into four states, and the standard of the average height and maximum height of corrosion for each state was derived.

• Journal of the Korea Safety Management & Science
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• v.24 no.4
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• pp.61-70
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• 2022

In spite of lab safety act for over 10 years, over 100 safety accidents in the laboratory have been constantly occurring. The ideal safety management system is to prevent accidents by differential classifying and managing laboratory regulatory materials according to the risk level. In order to approach this system, in-depth interviews with safety managers were first conducted to identify the current status of safety management in domestic university laboratories. And then through comparative analysis of safety management systems in domestic and foreign laboratories, a new regulatory substance classification standard based on the analysis of the hazards and the classification of risk grades, and a safety management system are proposed. From this study, it will contribute to the creation of a safe laboratory environment by differential classification and management laboratory regulatory materials based on the risk level.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.61-62
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• 2022

알츠하이머성 치매는 현존하는 치료법이 없어 경도인지장애 단계에서의 예방이 중요하다. 지금까지의 알츠하이머 연구는 대부분이 뇌영상 마커와 뇌척수액 마커에 집중되어 있었으며, 경도 인지 장애 단계에서의 탐색은 더욱 적었다. 이러한 점에서 혈액 유전자 발현을 이용한 경도 인지장애 단계 예측은 인지 능력에 따른 관련 유전자 식별과 접근 가능한 진단 및 치료 바이오 마커 탐색에 기여할 수 있다. 그러나 유전자 발현 데이터의 경우 환자 수에 비해 높은 차원을 가지기 때문에 과적합을 막고 질병 관련 유전자를 식별하기 위해서는 데이터에서의 의미 있는 차원만을 뽑아내는 차원 축소가 선행되야 한다. 본 연구는 유전자 발현데이터에서의 인지장애 분류를 위해 차원 축소기법과 신경망을 적용하여 인지 장애 정도를 예측하였다. 그 결과, Lasso 이용 차원축소와 신경망을 이용하여 97%의 정확도로 정상과 조기 경도 인지장애, 후기 경도 인지장애 환자를 분류 할 수 있었으며, 더 적은 차원에서도 분류가 가능했다. 이는 혈액 유전자 발현을 이용해 경도 인지장애 단계를 예측한 첫 번째 연구이며, 인지능력 저하에 따른 혈액 유전자 발현의 연관성을 확인하고 향후 조기 진단, 치료 표적 탐색에 기여한다.

• Journal of the Korean Society for Heat Treatment
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• v.37 no.2
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• pp.58-65
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• 2024

In the present study, the effect of annealing condition on the microstructures and mechanical properties of the cold-rolled CoCrFeMnNi high entropy alloys were studied. Annealing treatment was performed under six different temperatures. Microstructural analyses confirmed that annealing below 800℃ resulted in the formation of intermetallic sigma (σ) phase within face-centered cubic (FCC) matrix, and this σ phase has beneficial effects on the formation of fine-grained structures through retardation of grain growth and recrystallization due to Zener pinning effect. This led to the enhanced yield strength and tensile strength of ~646 and ~855 MPa, respectively. The microstructures annealed above 800℃ demonstrated single FCC phase, and fully-recrystallized single FCC microstructure resulted in a slight increase in ductility with a considerable decrease in strength. The evolution of mechanical properties, such as strength, ductility, and strain hardening exponent, will be discussed.

• The Journal of the Korea Contents Association
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• v.18 no.6
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• pp.667-678
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• 2018

The purpose of this study is to investigate empirically the factors affecting the research results of humanities and social sciences based convergence research. For this purpose, personal characteristics, research environment factor, researcher factor, research team factor, and support agency factor were set as influence factors of convergence research. Survey was conducted for researchers who are conducting research on humanities and social sciences based convergence research. As a result, it was found that factors influencing research on humanities and social sciences based convergence were researcher factor, supporting agency factor, research environment factor(major), and the influence of these factors on convergence research result was 51.6%. The implications of the research results are as follows: First, when performing the convergence research based on humanities and social science, individual factor of the researcher is more important than the factor of the research team in the performance of convergence research. Second, the support organization can improve the convergence research result through continuous management of convergence research results. Third, the research field (major) of the researcher also influences the performance of the convergence research. Therefore, the research field (major) should be considered important in the formation of the convergence research team.

• Journal of Convergence for Information Technology
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• v.11 no.12
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• pp.59-69
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• 2021

This study aimed to clarify the effects of nursing students' major selection motivation on their career decision making self-efficacy and major satisfaction. For the goal, the study made a questionnaire survey of 300 nursing students in their 3rd or 4th year of a college in J City. 285 sheets were finally analyzed using the SPSS 25 Program. The findings of this research are as follows. Concerning general characteristics, there's a significant difference in influence on the abovementioned self-efficacy between personality and school satisfaction. Major satisfaction significantly varied depending on school satisfaction. There were significantly positive correlations existed between major selection motivation, and major satisfaction. Either intrinsic or extrinsic motivation affected the foresaid self-efficacy and major satisfaction in a significant, positive way. Regarding the influence of factors of major satisfaction on those of major selection motivation, curriculum and perception satisfaction had significant effects on intrinsic motivation as well as extrinsic one, while relationship satisfaction had such effect only on intrinsic motivation. These findings suggest that strategies for raising nursing students' major selection motivation should be taken, resultantly improving their career decision making self-efficacy and major satisfaction.

• Convergence Security Journal
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• v.15 no.6_1
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• pp.17-23
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• 2015

This study a Descriptive research to examine the relationships between Military field experience and Major satisfaction, On the focus of noncommissioned officer's department of College. The data was collected from 370 College students, April 6 to April 10, 2015. Descriptive statistics, frequency, t-test, ANOVA, scheffe test, and pearson correlation analysis were performed using SPSS/WIN 20.0 program. Results: In critical Military field experience, there were significants differences in Security-related education, training Major selection motiveage and Hope career field after graduation. And Major satisfaction has a positive relationships between Military field experience(r=.59, P<.001). Conclusion: To enhance problem process ability for noncommissioned officer's department of College, it is necessary to develop teaching program and curriculum.

• Journal of Convergence for Information Technology
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• v.8 no.6
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• pp.21-29
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• 2018

The purpose of study is to investigate the effect of life stress on university life satisfaction and majors' From April 2, 2018 to April 23, 2018, 364 students enrolled in Jeollanam-do and Gwangju were enrolled. The university life satisfaction and major satisfaction according to the general characteristics were the highest in the subjective health condition. Among the stresses of life, the professions were high in the interpersonal relations area and the academic problems were the highest among the task areas. The total stress of life was the lowest in 6-8 hours in the case of usual sleeping time. The major factor influencing college life satisfaction was majors' satisfaction. The major factor influencing major satisfaction was college life satisfaction, and the higher the life stress, the lower the satisfaction of major. Therefore, I would like to use this data as basic data for the development of programs that can alleviate life stress of University students.

• Journal of the Korea Convergence Society
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• v.10 no.5
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• pp.323-331
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• 2019

The purpose of this study is to investigate the relationship between exercise participation attitude, self- esteem and achievement goal orientation of college students majoring physical education. In order to achieve the purpose of study, a survey was conducted with 385 college students majoring physical, and the data collected from the survey were processed for frequency analysis, exploratory factor analysis, reliability analysis, correlation analysis, and standard multiple regression analysis using SPSS Version. 15.0. The following results were drawn from these analyses. First, it was found that all the sub-variables between exercise participation attitude and self-esteem of college students majoring physical education are related. Second, it was found that all the sub-variables between exercise participation attitude and achievement goal orientation of college students majoring physical education are related. Third, it was found that all the sub-variables between self-esteem and achievement goal orientation of college students majoring in physical education are related.

• Journal of Convergence for Information Technology
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• v.12 no.5
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• pp.271-277
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• 2022

In this study, the effect of the anatomical practice extracurricular program on the major efficacy and satisfaction of medical health students was investigated. The research tool used a major efficacy survey, a program satisfaction survey, the major efficacy survey compared and analyzed the improvement before and after participation in anatomy practice and the satisfaction survey between anatomy pictures after completion of the extracurricular program. As a result of comparative analysis between the two groups, the effect on major efficacy was significant after the program progression, and in the case of satisfaction, the satisfaction of the anatomical practice group was higher than that of the anatomical picture group. Through these research results, when operating an anatomical practice extracurricular program, it is thought that operating an anatomical practice program rather than creating an anatomical picture improves the major efficacy and satisfaction score.