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신지영,손영석,차득근,이철균,황이철,Shin, Jee-Young,Son, Young-Seok,Cha, Duk-Guen,Lee, Cheol-Gyun,Hwang, I-Cheol 한국마린엔지니어링학회 2006 한국마린엔지니어링학회지 Vol.30 No.8
The objective of this study is to investigate the aerodynamic characteristics of a vertical axis wind turbine blade as the basic study of a design of a vertical axis wind turbine. The lift and drag coefficients of the various shape of the vortical axis wind turbine blades are analyzed and compared using the CFD code Fluent. To validate the numerical analysis, the predicted results of the Fluent are compared with those of the Xfoil code and the experimental results. We conclude that the program Fluent can be used to predict the aerodynamics of the wind turbine blade. By comparing the predicted results of the aerodynamic characteristics of the different shape of the blades, an appropriate shape of the blade is suggested to design the vortical axis wind turbine blade.
피혁산업 바이오매스에서 생산된 바이오차의 물리화학적 특성 및 중금속 흡착 특성
신지영(Jee-young Shin),김동수(Dong-Su Kim),Hiresh Moradi,최예진(Ye-Jin Choi),양재규(Jae-Kyu Yang) 유기성자원학회 2022 유기성자원학회 학술발표대회논문집 Vol.2022 No.추계
피혁산업에서는 공정특성에 따라 shaving scrap, pelt scrap, buffing dust 등의 고형폐기물이 상당량 발생되고 있는데 이들의 재할용 및 고부가치물질로의 전환은 매우 주목을 받고 있다. 본 연구에서는 가죽 생산 공정 중 원피 무게의 50% 이상 고형폐기물로 발생하는 pelt scrap 콜라겐 단백질의섬유 기재에 미모사 및 채스트넛 식물성 탄닌으로 고정화하는 방법(Immobilization)을 적용하여 배위결합이 가능한 작용기를 도입한 바이오 흡착제를 바이오매스 사용하여 바이오차를 제조하였으며, 제조한 바이오차의 특성 분석을 위해 FT-IR, 비표면적 및 기공크기분포 분석을 실시하였다. 최적 제조조건에서 제조한 바이오차를 이용하여 반응용액의 pH, 반응온도, 흡착질/흡착제 비 변화에 따른 여러회분식 실험을 실시하였다. 이들에 대하여 중금속 제거용 흡착제로서의 재활용성을 평가하기 위하여양이온성의 중금속인 Cu(II) 이온을 함유한 인공폐수를 사용하여 다양한 반응조건에서의 회분식 실험을 실시하여 중금속들의 흡착특성 연구를 진행하였다.
Literacy Practices in the Language Minority Homes and School of Korean Children in the USA
Shin, Jee-Young(신지영),Kwon, Yeon-Jin(권연진) 새한영어영문학회 2016 새한영어영문학 Vol.58 No.2
The pilot case study explored how language minority families and their mainstream preschool teacher supported their language minority children, in order to determine ways to enhance the home and school literacy connection. Participants in the study included two Korean families who had children enrolled in a Head Start program with their American teacher. The multiple methods of data collection included a survey, interviews and video recording of classroom and home literacy practices. Findings revealed that although parents and teachers provided good support to their children, their literacy support was rather isolated and disconnected. Via the lens of funds of knowledge, the underlying issue of the disconnected home-school literacy support was related to the inactivation of students’ home language and culture, as a resource for L2 literacy learning. Lastly, this study suggested some ways to enhance the bridge between language minority homes and classrooms, including the practice of classroom book reading at home and sharing video clips of literacy activities at home and school.
신지영(Jee-Young Shin),손영석(Young-Seok Son),한동원(Dong-Won Han) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
Design procedure for a counterflow-type cooling tower was set up using conventional Merkel theory. The design data could be. different depending on the characteristic curve selected by the engineer. It reveals that the consistent and reasonable criteria are required based on the exact information of the cooling tower performance. In this study, an off-design performance analysis program .for a counterflow-type cooling tower was developed and verified by comparing with experimental data. Also, the effect of various operating conditions on the off-design performance of a cooling tower was analyzed.
성인 천식 환자들에서 Cytokeratin 18 단백에 대한 IgG 자가항체와 천식의 임상적 중증도 간의 연관성
신지영 ( Jee Young Shin ),권별 ( Byul Kwon ),신호수 ( Ho Su Sin ),예영민 ( Young Min Ye ),박해심 ( Hae Sim Park ),남동호 ( Dong Ho Nahm ) 대한천식알레르기학회 2006 천식 및 알레르기 Vol.26 No.3
Background: Cytokeratin 18 (CK18) protein was identified as an airway epithelial cell antigen associated with nonallergic asthma. Objective: We evaluated an association between IgG autoantibodies to CK18 protein and clinical severity of asthma in this study. Method: Severe asthma was defined as when patients had experienced at least one severe asthmatic exacerbation requiring an emergency room visit or admission in the last year despite continuous typical therapies. Moderate asthma was defined as when patients had been controlled by typical therapies without severe asthmatic exacerbation in the last year. Mild asthma was defined as when patients experienced intermittent asthmatic symptoms and did not need continuous anti-asthmatic treatments in the last year. IgG autoantibodies to CK18 protein were detected in serum samples by immunoblot analysis Result: IgG autoantibodies to CK18 protein were detected in 48 of 161 asthmatic patients (29.8%) and 5 of 58 healthy controls (8.6%) (P=0.002). IgG autoantibodies to CK18 protein were detected in 1 of 20 patients with mild asthma (5.0%), 22 of 63 patients with moderate asthma (34.9%), and 25 of 78 patients with severe asthma (32.1%)(P<0.001). Conclusion: These findings suggest that IgG autoantibodies to CK18 protein could be a biological marker for moderate-to-severe asthma requiring continuous medical treatment. (Korean J Asthma Allergy Clin Immunol 2006;26:219-224)
발포 금속을 사용하는 채널의 열전달 특성 실험 및 해석
손영석(Young-Seok Son),신지영(Jee-Young Shin),조영일(Young-Il Cho) 대한설비공학회 2010 설비공학 논문집 Vol.22 No.7
Porous media containing complex fluid passage have especially large surface area per unit volume. This study is aimed to identify the heat transfer characteristics of high-porosity metal foams in a horizontal channel. Experiment is performed under various heat flux, velocity and pore density. Nusselt number decreases with higher pore density. Metal foams shows higher heat transfer coefficients than pin-fin structure with the same porosity. This is due to the more complex flow passage and larger heat transfer area based on the structure of the metal foams. The analysis on the pin-fin structure may not be suitable to the metal foam structure but should be identified extensively through further study.