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바이오디젤 축소 메커니즘의 저온산화반응 개선 및 3-D 엔진 해석
서현규,서현규,송윤석,임영찬,박인강 한국연소학회 2022 한국연소학회지 Vol.27 No.4
This study was conducted to improve errors such as low-temperature heat release, ignition delays, and exhaust emissions that occurred during the mechanism reduction process. To achieve this, the error of the reduced mechanism was improved by modifying the A-factor of the important reaction in the selected combustion process through the analysis of the reaction path of 0D CVC. As a result of the 3D CFD analysis, the NOx error rate of the improved mechanism decreased from 92% to 14%, the ignition delay error decreased by 2% on average, and the low temperature and NTC regions, which were the key targets, decreased by 6%.
의료산업체 수요맞춤형 물리치료교육과정 개발에 관한 연구
서현규,이재홍,권원안,Seo, Hyun-Kyu,Lee, Jae-Hong,Kwon, Won-An 대한고유수용성신경근촉진법학회 2012 PNF and Movement Vol.10 No.3
Purpose : This research has been studied physical therapy curriculum according to the demands of the medical institution. Methods : The subjects of this study were 88 physical therapists. The subjects were divided by OS(n=41) and NS(n=47) group. The results of research were analyzed using independent t-test with average and standard deviations as the statistical methods for data analysis. Results : the results of the study were as follow : First, it was needed on the development planning for physical therapy curriculum according to the demands of the medical institution. Second, tests of independent t-test were a statistically significant difference between OS and NS group on the demands of the medical institution. Third, it was needed that time tables on physical therapy curriculum were partially regulated by the demands of the medical institution. Conclusion : We suggest to change the curriculum of physical therapy. It is more accurately reflected the rigor of the high-quality education preparation needed for current and future practice.
서현규 한국기계기술학회 2021 한국기계기술학회지 Vol.23 No.1
In this study, the cooling performance of the motor was analyzed according to the number and the length of the fins of the heat sink, and at the same time, the effect of forced convection on the cooling performance improvement by changing the air flow speed of the cooling fan was conducted. In order to find out the cooling performance in terms of turbulent kinetic energy, pressure, and temperature according to the number of heat sink fins, length of fins, and wind speed of the cooling fan, an aluminum heat sink was modeled according to the size of the motor. The heating value of the motor was calculated, and it was set to be the same under all analysis conditions. The turbulence model applied for numerical analysis in this study used the standard k-ε model. As a result, it was confirmed that the cooling effect of the heat sink increases as the air flow speed of the cooling fan, the number of fins, and the length of fins increase.
서현규,권원안,양경한 대한물리치료학회 2000 대한물리치료학회지 Vol.12 No.1
This study shows that menstrual pain is decreased conspicuously or disappeared completely after appliying taping therapy to the patients who had menstrual paid but could not find special treatments for it. The study also indicates that the taping therapy helped the patients who had s long menstrual period to have the period reduced, and who had a short period to have it prolonged. All the phenomena of menstruation were inclined to maintain equlibrium due to the taping therapy, Therefore, it is believed that the taping therapy, which is one of the alternative medical fields, will minimize menstrual pain with the medical therapy.