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차혜림,고재우,임종락,David-Kwangsoon Kim,안형근 한국전기전자재료학회 2017 Transactions on Electrical and Electronic Material Vol.18 No.1
The building integrated photovoltaic system (BIPV) attracts attention with regard to the future of the photovoltaic (PV)industry. It is because one of the promising national and civilian projects in the country. Since land area is limited,there is considerable interest in BIPV systems with a variety of angles and shapes of PV panels. It is therefore expectedto be one of the major fields for the PV industry in the future. Since the irradiation is different from each installationangle, the output can be predicted by the angles. This is critical for a PV system to be operated at maximum powerand use an efficient design. The development characteristics of tilted angles based on data results obtained via longtermmonitoring need to be analyzed. The ratio of the theoretically available and actual outputs is compared with theinstallation angles of each PV module to provide a suitable PV system for the user.
차유림,민소영,장혜림 한국청소년복지학회 2022 청소년복지연구 Vol.24 No.4
본 연구는 아동양육시설, 공동생활가정, 위탁가정에서 보호종료된 자립준비청년의 자립 준비와 자립경험을 탐색하고자 하였다. 이를 위해 자립준비청년 7명을 연구참여자로 하여 초점집단면접과 개별심층면접을 실시하였다. 수집된 자료를 질적 연구방법을 활용하여 분석한 결과, 4가지 주제와 15개의 범주를 도출하였다. 핵심 주제는 ‘유사한 경험-자립은 혼자서, 스스로 해내야 하는 과정’, ‘유사한 경험-권리보장에 대한 기대’, ‘다른 경험-보호형태에 따라 다른 출발’, ‘다른 경험-자립 이후에도 다른 네트워크’였다. 보호시설의 형태에 따라 자립준비청년의 자립 준비와 자립경험에는 공통점과 차이점이 있는 것으로 나타났으며, 이러한 연구 결과를 바탕으로 사회복지적 함의를 제언하였다.
View Factor를 고려한 마이크로그리드 적용용 고효율 P-Type Si 양면형 태양광 모듈의 출력량 예측
최진호,김광순,차혜림,김규광,방병관,박소영,안형근,Choi, Jin Ho,Kim, David Kwangsoon,Cha, Hae Lim,Kim, Gyu Gwang,Bhang, Byeong Gwan,Park, So Young,Ahn, Hyung Keun 한국전기전자재료학회 2018 전기전자재료학회논문지 Vol.31 No.3
In this study, 20.8% of a p-type Si bifacial solar cell was used to develop a photovoltaic (PV) module to obtain the maximum power under a limited installation area. The transparent back sheet material was replaced during fabrication with a white one, which is opaque in commercial products. This is very beneficial for the generation of more electricity, owing to the additional power generation via absorption of light from the rear side. A new model is suggested herein to predict the power of the bifacial PV module by considering the backside reflections from the roof and/or environment. This model considers not only the frontside reflection, but also the nonuniformity of the backside light sources. Theoretical predictions were compared to experimental data to prove the validity of this model, the error range for which ranged from 0.32% to 8.49%. Especially, under $700W/m^2$, the error rate was as low as 2.25%. This work could provide theoretical and experimental bases for application to a distributed and microgrid network.
매설지선 방식을 적용한 에너지 자립마을용 수상 태양광 발전 시스템의 접지저항 분석
고재우,임종록,차혜림,김시한,이창구,안형근,Ko, Jae-Woo,Lim, Jong-Log,Kim, David K.,Cha, Hae-Lim,Kim, Si-Han,Lee, Chang-Koo,Ahn, Hyung-Keun 한국전기전자재료학회 2016 전기전자재료학회논문지 Vol.29 No.5
Floating PV system is installed on the water such as artificial lake, reservoir, river for the purposes of zero energy town and/or large scale of PV station. There are electrical gains from cooling effect by water and reflection of water surface. Particularly, floating PV power station with high efficiency solar cell modules receives a lot of attention recently. Floating PV system is installed on the water, which means grounding method to the frame of solar cell and electrical box such as connector band and distribution panelboard should be applied in different way from grounding method of PV system on land. The grounding resistance should be 10[${\Omega}$] in case the voltage is over 400[V] in accordance with Korean Standard. The applicable parameters are the resistivity of water in various circumstances, depth of water, and length of electrode in order to meet 10[${\Omega}$] of grounding resistance. We calculated appropriate length of the electrode on the basis of theoretical equation of grounding resistance and analyzed the relation between each parameters through MATLAB simulation. This paper explains grounding system of floating PV power station and presents considerations on grounding design according to the resistivity of water.
Effects of Adenoviral Gene Transduction on the Stemness of Human Bone Marrow Mesenchymal Stem Cells
Subash Marasini,장다영,정진화,이수정,차혜림,서해영,김성수 한국분자세포생물학회 2017 Molecules and cells Vol.40 No.8
Human mesenchymal stem cells (MSCs) are currently being evaluated as a cell-based therapy for tissue injury and degenerative diseases. Recently, several methods have been suggested to further enhance the therapeutic functions of MSCs, including genetic modifications with tissue- and/or disease-specific genes. The objective of this study was to examine the efficiency and stability of transduction using an adenoviral vector in human MSCs. Additionally, we aimed to assess the effects of transduction on the proliferation and multipotency of MSCs. The results indicate that MSCs can be transduced by adenoviruses in vitro, but high viral titers are necessary to achieve high efficiency. In addition, transduction at a higher multiplicity of infection (MOI) was associated with attenuated proliferation and senescence-like morphology. Furthermore, transduced MSCs showed a diminished capacity for adipogenic differentiation while retaining their potential to differentiate into osteocytes and chondrocytes. This work could contribute significantly to clinical trials of MSCs modified with therapeutic genes.