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Q-Methodological Approach on Type Analysis of Elderly Participating in Health Qigong after COVID-19
Yeonsu Byeon(Yeonsu Byeon),Jaebum Lee(Jaebum Lee),Sungwoo Sim(Sungwoo Sim) J-INSTITUTE 2022 Protection Convergence Vol.7 No.2
Purpose: In this study, analysis was conducted using the Q-methodology to find out the types of elderly people participating in Health Qigong after COVID-19. The Q-methodology studies human subjectivity by considering an individual's perception, attitude, emotion, and behavior toward an object at the same time. Method: In the research procedure, the Q-population was first constructed and the Q sample statement was prepared. In the Q-population, 85 data were obtained through in-depth interviews, 46 data obtained through a literature review were derived, and 131 were finally derived as the primary statement. Comprehensive data were analyzed through in-depth interviews, related literature research, and expert meetings, and a total of 34 Q-sam-ple statements related to the research topic were extracted. Data analysis was performed using the QUNAL-PC program, and the principal component factor analysis method was used for factor analysis. Results: As a result of the study, the elderly who participated in Health Qigong were found to be the final four types. Type I was classified as an active participation type among the elderly participating in Health Qigong. Type II was classified as a type that recognized that Health Qigong training was connected with healing. Type III was classified as a type recognized that Health Qigong is related to psychological sympathy, that is, emotional state. Type IV was classified as a type that recognizes that it is possible to make new colleagues while socializing with others through Health Qigong. Conclusion: Currently, Korean society is going through an age of super-aging, and there is a view that sees old age as a time of new creation. Therefore, prepare for successful aging, it is necessary to find a positive way to improve the lives of the elderly. The classification contents of the elderly participating in Health Qigong derived as a result of this study reflect the perception and attitude of the elderly participating in physical activity well.
The Universality and Specificity of Health Qigong from a Beginner’s Perspective
Jaebum Lee(Jaebum Lee),Dong Liang(Dong Liang),Yeonsu Byoen(Yeonsu Byoen) J-INSTITUTE 2024 International Journal of Martial Arts Vol.9 No.-
Purpose: Health Qigong is an exercise that moves slowly to rhythm and is a type of slow exercise based theoretically on Chinese medicine. In this study, we sought to find out how people who are practicing Health Qigong for the first time are experiencing changes in their perception. Accordingly, this study was conducted for the purpose of examining the universality and specificity of Health Qigong compared to other sports from the perspective of beginners practicing Health Qigong. Method: Six beginners in Health Qigong who could provide sufficient answers to the research topic were selected as participants. The study participants participated in a total of 15 training programs and 1 presentation over 4 months and consisted of 3 men and 3 women. The data analysis process used Colaizzi's six-step analysis method in the phenomenological research method among qualitative research methods, and structured the changes in perception according to the participants' experiences by dividing them into universality and specificity. In addition, the participants' facial expressions and gestures were recorded and used as additional observation data and reflected in the research results. Results: As a result of the study, 3 categories, 7 topic bundles, and 15 subjects were finally identified. In the category of universality, physical, emotional, and convenience of space use were identified, and in the category of differentiation, movement characteristics and exercise types were identified, and convenience and fun were identified in the Health Qigong presentation. Conclusion: The results of this study will be meaningful in that they provide an opportunity to continue the cycle of participation by identifying the uniqueness of the Health Qigong program. In future research, specific and practical educational plans should be presented to expand the base of the program as well as research on the effects of Health Qigong training.
High-strength carbon nanotube/carbon composite fibers via chemical vapor infiltration
Lee, Jaegeun,Kim, Teawon,Jung, Yeonsu,Jung, Kihoon,Park, Junbeom,Lee, Dong-Myeong,Jeong, Hyeon Su,Hwang, Jun Yeon,Park, Chong Rae,Lee, Kun-Hong,Kim, Seung Min The Royal Society of Chemistry 2016 Nanoscale Vol.8 No.45
<P>In this study, we have developed an efficient and scalable method for improving the mechanical properties of carbon nanotube (CNT) fibers. The mechanical properties of as-synthesized CNT fibers are primarily limited by their porous structures and the weak bonding between adjacent CNTs. These result in inefficient load transfer, leading to low tensile strength and modulus. In order to overcome these limitations, we have adopted chemical vapor infiltration (CVI) to efficiently fill the internal voids of the CNT fibers with carbon species which are thermally decomposed from gas phase hydrocarbon. Through the optimization of the processing time, temperature, and gas flow velocity, we have confirmed that carbon species formed by the thermal decomposition of acetylene (C2H2) gas successfully infiltrated into porous CNT fibers and densified them at relatively low temperatures (650-750 degrees C). As a result, after CVI processing of the as-synthesized CNT fibers under optimum conditions, the tensile strength and modulus increased from 0.6 GPa to 1.7 GPa and from 25 GPa to 127 GPa, respectively. The CVI technique, combined with the direct spinning of CNT fibers, can open up a route to the fast and scalable fabrication of high performance CNT/C composite fibers. In addition, the CVI technique is a platform technology that can be easily adapted into other nano-carbon based yarn-like fibers such as graphene fibers.</P>
Study on the influence of sewer network simplification on urban inundation modelling results
Lee, Seung-Soo,Pakdimanivong, Mary,Jung, Kwan-Sue,Kim, Yeonsu 한국수자원학회 2018 한국수자원학회논문집 Vol.51 No.4
도시유역에서 발생한 유출은 지표면뿐만 아니라 하수관망을 통해 배수되며, 도시침수 모의 수행시 하수관망을 수문학적 배수 시스템의 한 구성요로서 고려하는 것은 매우 중요하다. 그러나 도시 침수 모의를 수행하는 대부분의 연구자들이 적절한 기준에 준하지 않고 직관적으로 하수관망을 단순화시켜 모의를 수행하는 실정이다. 따라서 본 연구에서는 1D-2D 결합 도시침수 해석 모형을 이용하여 수지상 구조에 구분법에 기반하여 단순화 된 하수관망의 도시침수 해석 결과에 미치는 영향을 분석하였다. 하수관망 해석을 위한 1차원 모델은 Lee et al. (2017)에 의해 소개된 모형으로서 지표면과 하수관망 사이의 유입과 역류를 동시에 모의할 수 있고, 2차원 지표면 모델은 불규칙 삼각망을 이용하여 지표수 흐름을 모의하며 1차원 하수관망 해석모형과 연계되어 도시침수를 모의할 수 있다. 하수관망은 수지상 구조 구분법에 기반하여 2차, 3차 그리고 단순화 하지 않은 경우로 구분할 수 있으며, 구분된 각 하수관망은 서울시 사당역 인근에 많은 침수 피해를 발생시킨 2011년 7월 27일 강우 사상에 적용하여 제안된 방법의 적용성을 평가하였다. 모든 케이스에 대하여 침수면적, 지표면에서 하수관망으로의 유입 유량, 하수관망에서 지표면으로의 역류 유량 등을 비교하였으며, 마지막으로 하수관망 단순화를 위한 적절한 기준 제시에 대한 논의를 수행하였다. In urban areas, runoff flow is drained through sewer networks as well as surface areas. Therefore, it is very important to consider sewer networks as a component of hydrological drainage processes when conducting urban inundation modelling. However, most researchers who have implemented urban inundation/flood modelling, instinctively simplified the sewer networks without the appropriate criteria. In this research, a 1D-2D fully coupled urban inundation model is applied to estimate the influence of sewer network simplification on urban inundation modelling based on the dendritic network classification. The one-dimensional (1D) sewerage system analysis model, which was introduced by Lee et al. (2017), is used to simulate inlet and overflow phenomena by interacting with surface flow. Two-dimensional (2D) unstructured meshes are also applied to simulate surface flow and are combined with the 1D sewerage analysis model. Sewer network pipes are simplified based on the dendritic network classification method, namely the second and third order, and all cases of pipes are conducted as a control group. Each classified network case, including a control group, is evaluated through their application to the 27 July 2011 extreme rainfall event, which caused severe inundation damages in the Sadang area in Seoul, South Korea. All cases are compared together regarding inundation area, inflow discharge and overflow discharge. Finally, relevant criterion for the simplification method is recommended.