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- 검색키워드
- 저자 : Byeongchan Choi (검색결과 23 건)
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Byeongchan Choi,Moongi Ji,Songjin Oh,Mi ja Lee,Man-Jeong Paik 한국분석과학회 2021 학술대회논문집 Vol.2021 No.11
Barley (Hordeum vulgare), a member of the grass family, is a major cereal grain grown in temperate climates globally. It is the most widely adapted cereal grain species with various nutrients and provided as a peeled form after milling in the market. This milling process is known to cause changes in the nutritional composition and taste of barley as well as metabolite levels. However, metabolomic study between pre- and post-milling barley was not fully understood. Among many metabolites, amino acids (AAs) are essential components of organisms, which play an important role for evaluation of various tastes. In addition, organic acids (OAs) contribute to the flavor of foods. Thus, in this study, metabolomic study of OA and AA was performed in three species (Saechalssalbori, Hinchalssalbori, and Yeongbaekchal) of pre- and post-milling barley. Profiling analyses of OAs as methoxime/tert-butyldimethylsilyl (TBDMS) derivatives and AAs as ethoxylcarbonyl-TBDMS derivatives were performed by gas chromatography-tandem mass spectrometry. The 36 metabolite levels of 16 OAs and 20 AAs were determined in the three species. Altered OAs and AAs were monitored in post-milling compared with pre-milling. In Saechalssalbori, α-ketoglutaric and pipecolic acid were significantly decreased (P-value < 0.05). In Hinchalssalbori, malonic acid, oxaloacetic acid, alanine, glycine, α-aminobutyric acid, leucine, isoleucine, proline, pipecolic acid, serine, γ-aminobutyric acid, phenylalanine, and glutamic acid were significantly decreased. In Yeongbaekchal, glycolic acid, 2-hydroxybutyric acid, fumaric acid, 4-hydroxyphenylacetic acid, 2-hydroxyglutaric acid, pipecolic acid, γ -aminobutyric acid, and tyrosine were significantly decreased, while α-ketoglutaric acid, cis-aconitic acid, α-aminobutyric acid, pyroglutamic acid, and glutamine were significantly increased. In PLS-DA score plot, the three species were completely separated between pre- and post-milling. Therefore, the present metabolomic study will be useful for the monitoring of altered metabolites following physical milling processes.
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Choi, Uiho,Woo, Seohwi,Lee, Sangil,So, Byeongchan,Nam, Okhyun American Scientific Publishers 2016 Journal of Nanoscience and Nanotechnology Vol.16 No.11
<P>In this paper, we report on the crystal quality improvement and self-separation of semipolar GaN by HCl chemical reaction etching (HCRE) using a hydride vapor phase epitaxy (HVPE) system. After HCRE, the surface roughness of the seed layer increased owing to etch pit generation and voids formed at the interface between the seed layer and the m-sapphire. The HCRE was effective for improving crystal quality as shown by the full width at half maximum (FWHM) and decreased anisotropy of the regrown thick semipolar GaN template. This was attributed to defect bending during regrowth due to the etched rough surface of the seed layer. Finally, a 150-mu m-thick GaN layer was grown after seed layer etching to confirm the possibility of self-separation. Self-separation occurred during the cooling down process, because of thermal stress concentration on the voids formed at the interface between GaN and sapphire by HCRE. The self-separated GaN piece substrate was strain-free and possessed an improved crystal quality, although the self-separation process should be optimized to obtain a single 2-in. wafer.</P>
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Hwansuk Choi,Byeongchan Kim,Sunggu Jo J-INSTITUTE 2021 International Journal of Martial Arts Vol.6 No.3
Purpose: For youth, in such a time where physical activities and self-concept development are vigorous, and at the same time, where physical activities are suppressed due to the stress of entrance exam related academic prep-arations, the negative impact of self-concept is an obstacle to their holistic development, and hence, it is im-portant for them to develop a positive self-concept, which requires an effective method. Hence, in order to spread the participation in sports activities for leading a healthy and sound life through the self-realization of youth and correct physical self-concept, by examining the effects of youth generativity through participation in the martial arts training on social adaptation and social happiness, it would be meaningful in helping to develop the regular education programs for youth. Method: In this study, by using the youth participating in martial arts training as the population as of 2021, the sampling method was used to survey 300 people by using the convenience sampling method, and the survey was conducted by using the self-administration method, and among the recovered survey questionnaires, the questionnaire was used as a valid sample except for the data in which the response contents were insincere or some of the contents were omitted. The data processing of this study was frequency analysis, Cronbach s α coeffi-cient calculation, factor analysis, and correlation analysis by using the SPSS 25.0 Program, a statistical package program. The multiple regression was used. Results: As a result of the factor analysis performed on generativity, social adaptation, and social happiness, it was consisted of 2 factors for generativity, 4 factors for social adaptation, and 4 factors for social happiness, and all factors turned out to be .05 or higher, respectively. As a result of the reliability validation performed, the Cronbach s α coefficient turned out to be between .952 and .673, and as a result of the correlation analysis per-formed, it turned out that there was a positive(+) relationship between all of the factors. It turned out that genera-tivity influences social adaptation and social happiness. Conclusion: To achieve the purpose of the study, a conclusion was reached that generativity influences social adaptation and social happiness through the results of the questionnaire. It is necessary to maintain and improve optimism through the mental and physical health by continuously participating in physical activities including the martial arts training for youth, and there is also a need for an environment where the youth may freely participate in sports activities without any restrictions and the method or policy supported by policy. Furthermore, since the positive image of athletes by sport, including Taekwondo, is continuously used as a communication tool in the modern society, it ought to be used to promote and help improve the image of sports through advertisements for many sports athletes.
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The Effect of the Sports Coaches PROFESSIONALISM on Ethical Sensitivity and Guiding Belief
Hwansuk Choi,Byeongchan Kim,Sunggu Jo J-INSTITUTE 2021 Kinesiology Vol.6 No.3
Purpose: As it is the mission of coaches to appropriately guide their athletes on ethical and moral character, the role of sports coaches is crucial beyond anything, and it is also necessary to consider the guiding beliefs and methods which lead the students(or trainees) in the desired direction if sports coaching or guidance is more than merely an educational role to play. Hence, the purpose of this study is to examine and articulate the professional-ism and ethical sensitivity of coaches, which have an important effect on the sports leagues as well as sports teams and athlete management, further to the effect on the guiding beliefs, thereby exploring an efficient opera-tional method for managing and fostering sports teams and athletes. Method: In this study, as of 2021, the coaches who were formerly professional sports athletes were used as the population, and as for the sampling method, 250 people were surveyed by the convenience sampling, while the survey was conducted by using the self-administration method, and among the collected questionnaires, those of 284 respondents were used as valid samples, excluding the data with insincere responses or omissions of some of the details of the survey. Results: As a result of the factor analysis performed on professionalism, ethical sensitivity, and guiding belief, the professionalism was consisted of professionalism factor and technical requirement factor, while ethical sensi-tivity was consisted of one factor for the ethical sensitivity factor, and guiding belief factor was consisted of the 3 factors of behaviorism factor, interactionism factor, and maturationism factor, respectively. As for reliability, it turned out that professionalism factor was α=.795, technical requirement factor α=.692, ethical sensitivity factor α=.799, behaviorism factor α=.800, interactionism factor α=.835, and maturity factor was α=.697, respectively. As a result of the correlation analysis performed, it turned out that there was a positive(+) relationship between all of the factors, and it also turned out that the professionalism factor influenced the ethical sensitivity factor and the educational belief factor. Conclusion: In order to achieve the purpose of this study, it is evident that the professionalism of sports coaches influences ethical sensitivity and guiding belief based on the results of the questionnaire. It is considered that it is necessary not only to explore the means to help improve the professionalism of sports coaches, which influences the ethical sensitivity and guiding beliefs of the sports coaches’ education, but also create and form an overall environment for the self-development of the sports coaches.
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Hwansuk Choi,Byeongchan Kim,Sunggu Jo J-INSTITUTE 2022 Public Value Vol.7 No.1
Purpose: The purpose of this study is to examine and understand the effect of the SNS related marketing activi-ties, which have recently emerged as an essential element for each club, including professional sports federations or associations, on the confidence in club and the intention to watch, and the direction of marketing activities related to professional sports. and assist with strategy formulation. Method: In this study, as of 2022, 260 fans of the four major domestic professional sports (professional baseball, professional soccer, professional volleyball, and professional basketball) were surveyed and the convenience sampling method was used as the sampling method, while the survey was conducted by the self-administration method. Among the collected questionnaires, 253 questionnaires were used as the valid samples, excluding the data with insincere responses or omission of some of the contents of the survey. The measurement tool was a questionnaire, and the data processing is the SPSS 23.0 Program, a statistical package program, and the frequen-cy analysis, reliability verification, factor analysis, correlation analysis, and the multiple regression were performed. Results: In this study, as a result of factor analysis and reliability verification, the SNS related marketing activities turned out to be event factor (α=.884), information factor (α=.871), and advertisement factor (α=.814), and confidence in club was classified as a confidence in club factor (α=.887), and intention to watch was classified as an intention to watch factor (α=.912). Furthermore, the SNS related marketing activities (event factor, information factor, and advertisement factor) affect the confidence in club, and the SNS related marketing activities (event factor, information factor, advertisement factor) affect the intention to watch, while the confidence in club was found to have an effect on the intention to watch. Conclusion: In this study, the SNS related marketing activities of professional sports clubs affect the confidence in club and the intention to watch, and related organizations including professional sports clubs that are develop-ing the SNS related marketing activities or planning the SNS related marketing activities in the future rather than providing information at the strategic level of ticket sales and publicity, from the consumer s point of view, will need to identify information related to their needs and desires, truly understand consumers, and provide the desired information appropriately through strengthening a reciprocal relationship to ensure that they can feel satisfaction. Furthermore, in the social media environment, it is necessary to develop diverse contents through various methods to accurately understand the interests of advertisement audiences and satisfy their needs, and it is determined to have a positive effect on in club and intention to watch, and professional sports clubs should use SNS related marketing activities more actively, and professional sports clubs will need to use the SNS related marketing activities far more actively.
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Hwansuk Choi,Sunggu Jo,Byeongchan Kim J-INSTITUTE 2022 International Journal of Crisis & Safety Vol.7 No.1
Purpose: The purpose of this study is to recognize the importance of the security police officers work or job in-volvement by examining the difference in terms of the job involvement according to the general characteristics of the South Korean security police, and furthermore, present the basic data for the organizational operation and improving the work efficiency of members. Method: In this study, 100 trainees of the Police Human Resources Development Institute, a police institute of education in Korea in 2020, were surveyed and the convenience sampling method was used for the sampling method, followed by the Self-Administration Method. An investigation was conducted. Among the collected ques-tionnaires, 91 questionnaires were used as valid samples, except for the data with insincere responses or omission of some of the details of the survey. The measurement tool is a questionnaire, and the data processing is a statis-tical package program, SPSS 23.0 Program, and the frequency analysis was performed to examine and understand the general characteristics, while the Cronbach s α coefficient was calculated to validate the reliability of the questionnaire. The confirmatory factor analysis was performed to classify the job involvement related factors, and the t-Test and the one-way ANOVA were performed to examine and understand the difference in terms of the job involvement of the security police according to the general characteristics. Results: In this study, the confirmatory factor analysis was performed to validate the conceptual validity of the measurement tool, and the concept reliability was all over 0.8, and the mean variance (AVE) values all exceeded 0.5, and hence, the concentration validity for all variables was evidently secured. Furthermore, the reliability of the questionnaire turned out to be .798 of Cronbach s α coefficient. As an empirical result, the difference in the job involvement according to general characteristics is, first, the difference in terms of the job involvement of the security police according to gender is higher in women than in men. Second, there was no significant difference in the job involvement of the security police according to age in the difference in terms of the job involvement of the security police according to age. Third, the difference in the job involvement of the security police according to educational background is higher than high school graduates with community college, 4 year college, and grad-uate degrees. Fourth, the difference in terms of the job involvement of the security police according to the number of employees in the affiliated organization is higher than that of 21 or more people than 10 people or less, 11 or more people and 15 people or less, and 15 or more people and 20 people or less. Fifth, there is no difference in the job involvement of the security police according to the area of service. Conclusion: As a result of the research process it turned out that there was a difference in the job involvement of the security police according to gender, educational background, and the number of employees in the affiliated organization, and there was no difference in terms of the job involvement according to age and the area of ser-vice. Hence, based on the in-depth and various studies related to job involvement according to the characteristics of the study subjects, a plan ought to be presented to enable the security police to more fully perform their original duties.
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Sunggu Jo,Byeongchan Kim,Bongjun Choi J-INSTITUTE 2023 International Journal of Martial Arts Vol.8 No.-
Purpose: Korean judo and taekwondo are traditional martial arts disciplines with strong track records at the Olympic and World Championships. Korean judo athletes have proven their international competitiveness by winning many medals for their technique and skill, while taekwondo has also won many medals and gained global recognition. South Korea's martial arts disciplines are grounded in tradition and philosophy, and continue to develop and advance through research and investment. Therefore, we wanted to explore the characteristics of martial arts practice through a survey of university student martial arts athlete in South Korea. Method: This study analyzed the general characteristics of the subjects, differences between variables, and correlations through frequency analysis, reliability verification, one-way ANOVA, Chi-square, Factor Analysis, Correlation Analysis, and Simple Linear Regression Analysis of Korean martial arts athletes' questionnaires. , and the influence were explored and analyzed. Results: As a result of analyzing followership, stress, empowerment, and organizational commitment of Korean martial arts athletes, the Judo team had a statistically significantly higher followership in all items than the Taekwondo team, and the Judo team had statistically higher stress and empowerment in certain items than the Taekwondo team. was found to be significantly higher. Martial arts events and training starting point were not related to the leader's followership, and martial arts events and university grades were found to be correlated. As a result of the factor analysis, 1-2 sub-factors of followership, stress, empowerment, and organizational commitment were derived. As a result of the correlation analysis, leader followership was significantly correlated with organizational commitment and empowerment, and stress was significantly correlated with organizational commitment and empowerment. As a result of the simple linear regression analysis, it was found that the leader's followership affects organizational commitment and empowerment, and stress has a partial effect on organizational commitment. Conclusion: Compared to the Taekwondo team, the Korean Judo team showed higher levels of followership in all categories, and in some items, stress and empowerment were also higher, which can be explained by differences in martial arts training methods or leadership styles. Martial arts training starting point were not related to the leader's followership, but were found to be related to the university grade. From these results, it can be seen that martial arts and university grades should be considered when forming a team. In the martial arts training team, the leader's followership has a significant effect on organizational commitment and empowerment, and it can be said that stress is also related to organizational commitment. Therefore, the leader must properly adjust the followership style and consider stress management and organizational commitment.
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