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Suhwan Yu,Kihan Kim 글로벌지식마케팅경영학회 2023 Global Marketing Conference Vol.2023 No.07
This study aimed to investigate the viewing experience of Taekwondo competitions, compare and analyze the viewing experience according to the type of Taekwondo competition, derive the viewing experience structure of Taekwondo contents, and confirm the potential of Power Taekwondo as a sustainable sports content developed for the purpose of popularizing Taekwondo.
염 침출법으로 제작된 다공성 세포지지체의 미시구조 모델링과 유효확산계수 예측
유수환(Suhwan Yu),조용상(Yong Sang Cho),조영삼(Young-Sam Cho),손동우(Dongwoo Sohn) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
This paper is concerned with microstructure modeling and analysis of porous scaffolds fabricated by the salt-leaching method. To model the pores and their interconnectivity generated by leaching cubic salt particles, packing and compression processes of salt particles are simulated using the discrete element method. Subsequently, finite element meshes of microstructures of pores are generated and the effective diffusivity of porous scaffolds is predicted using the finite element method. From the numerical results, it is demonstrated that the volume fractions and configurations of salt particles affect the effective diffusivity that can represent cell-culture characteristics.
Liquid Crystal Formulation and Optimization of Anti-Microbial Polyherbal Ointment.
Choi, Jae-Hwan,Cho, Cheong-Weon,Kim, Jae-Hun,Park, Soo Hyun,Chang, Suhwan,Yu, Young-Beob American Scientific Publishers 2015 Journal of nanoscience and nanotechnology Vol.15 No.8
<P>We examined the formulation of liquid crystalline systems (LCS) including 5% TSE extracts and analyzed marker substances of the 5% TSE ointment by HPLC-DAD. The TSE extracts were evaluated for its anti-bacterial activity against Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, and Candida albicans. We found the extracts showed predominant activity against selected bacterial species. The result of the polarized light microscopy, differential scanning calorimetry (DSC), small-angle X-ray diffraction (SXRD), and rheology analysis indicated the presence of LCS structures with lamellar arrangement. DSC of the TSE formulas showed higher transition peak temperature at 60 °c for the phase. SXRD observation of the LCS formulas showed that the structures of the LCS formulas were in the lamellar liquid crystalline phase. Further, to ensure the quality and purity of the TSE ointment, HPLC analysis was performed by measuring the. content of 2 marker substances. The contents of marker substances in the TSE ointment were calculated as 0.078% (paeoniflorin) and 0.031% (glycyrrhizin), respectively. Taken altogether, our study report successful generation of LCS made of 5% TSE ointment and its antimicrobial activity. Moreover, the quantitation of the two active components enable a proper quality control of the TSE extracts, that is essential for the development of ointment products.</P>