http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
결로방지를 위한 공용배기 활용 환기 시스템의 습도저감 성능 분석
이수인(Suin Lee),최경석(Gyeong-Seok Choi),이용준(Yong Jun Lee),이현화(Hyun-Hwa Lee) 대한설비공학회 2021 설비공학 논문집 Vol.33 No.2
In order to prevent condensation, it is necessary to remove water vapor through ventilation. In this study, we proposed a hybrid ventilation system in which natural ventilation and cen-tralized exhaust fan (VCE) ventilation systems are linked, and then compared the air flow of the natural ventilation system and the VCE system using a Computational fluid dynamics (CFD) model. The possibility of condensation was analyzed according to the systems’ chang-es in temperature and relative humidity, and the temperature and the humidity of the ventila-tion systems were directly measured within apartment houses. The results revealed that the ventilation volume of the whole household measured at 0.15 ACH when the natural ventila-tion was applied, and 0.50 ACH when the VCE system was applied. The average indoor air temperature only decreased by 1℃ when VCE was applied, indicating a very slight differ-ence when compared to the natural ventilation system. In addition, the result of analyzing the relative humidity distribution shows that the local relative humidity exceeded 100%, and that condensation conditions were formed when the natural ventilation system was applied. How-ever, the relative humidity distribution was even, and less than 100%, when the VCE system was applied, indicating a low probability of condensation. The results of analyzing the dif-ferences in average indoor air temperature with the VCE system shows that the air tempera-ture was measured to be 1.9℃ lower in the living room, and 2.27℃ lower in the laundry room, the balcony, and the evacuation space, than the air temperatures achieved with the nat-ural ventilation system. As a result of measuring the levels of absolute humidity, the average absolute humidity with the shared exhaust ventilation system was lower by 44.56% in the liv-ing room, the laundry room, and the evacuation space, when compared to the humidity of the natural ventilation opening case. Therefore, the results revealed that the humidity reduction performance was improved when the shared exhaust ventilation system was applied, when compared to the natural ventilation system, which could be effective in the prevention of condensation.
Compact fiber optic dual-detection confocal displacement sensor
Lee, Dong-Ryoung,Jang, Suin,Lee, Min woo,Yoo, Hongki The Optical Society 2016 Applied Optics Vol.55 No.27
<P>We propose a dual-detection confocal displacement sensor (DDCDS) with a compact fiber-based optical probe. This all-fiber-optic sensor probe is simple and robust, since it only requires simple alignment of a gradient refractive index lens and a double-clad fiber (DCF). The DDCDS is composed of two point detectors, one coupled to a single mode fiber and the other coupled to a multimode fiber, which are used to measure the light intensity from a core and an inner clad of a DCF, respectively. The ratio of the axial response curves, measured by the two detectors, can be used to obtain a linear relationship between the axial position of the object plane and the ratio of the intensity signals. We demonstrate the performance of the proposed method by measuring micromovement and fast vibration. (C) 2016 Optical Society of America</P>
Microarray Analysis of Extracranial Arteriovenous Malformation Endothelial Cells
Lee, Joon Seok,Oh, Eun Jung,Kim, Hyun Mi,Kwak, Suin,Lee, Seok-Jong,Lee, Jongmin,Huh, Seung,Kim, Ji Yoon,Chung, Ho Yun Interdisciplinary Society of GeneticGenomic Medici 2022 Journal of interdisciplinary genomics Vol.4 No.2
Background: Arteriovenous malformations (AVMs) are rare diseases comprising abnormally dilated arteries and veins with an absence of a capillary network. Since these diseases are intractable after diagnosis, various treatment strategies have been examined, with continuous efforts to identify target genes. Here, we report relevant new target genes selected via gene microarray. Methods: Endothelial cells were isolated from samples collected from three patients with AVM and three healthy individuals, followed by microarray analysis. Additionally, quantitative PCR was performed to select genes highly relevant to AVM. Results: In the vascular endothelial cells derived from the tissues of patients with AVM, the expression of ANGPT1, ANGPT2, DLL4, IL6, NRG1, TGFBR1, and VEGFA was typically higher compared to those derived from normal tissues. Conclusion: Seven candidate genes were selected to analyze the pathophysiological mechanism of AVM. These results may aid in future directions of diagnosis and treatment.
Suin Lee,Dohyung Kim,Jongyeol Lee 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.2
Economical radioactive soil treatment technology is essential to safely and efficiently treat of high-concentration radioactive areas and contaminated sites during operation of nuclear power plants at home and abroad. This study is to determine the performance of BERAD (Beautiful Environmental construction’s RAdioactive soil Decontamination system) before applying magnetic nanoparticles and adsorbents developed by the KAERI (Korea Atomic Energy Research Institute) which will be used in the national funded project to a large-capacity radioactive soil decontamination system. BERAD uses Soil Washing Process by US EPA (402-R-007-004 (2007)) and can decontaminate 0.5 tons of radioactive soil per hour through water washing and/or chemical washing with particle size separation. When contaminated soil is input to BERAD, the soil is selected and washed, and after going through a rinse stage and particle size separation stage, it discharges decontaminated soil separated by sludge of less than 0.075 mm. In this experiment, the concentrations of four general isotopes (A, B, C, and D which are important radioisotopes when soil is contaminated by them.) were analyzed by using ICP-MS to compare before and after decontamination by BERAD. Since BERAD is the commercial-scale pilot system that decontaminates relatively large amount of soil, so it is difficult to test using radioactive isotopes. So important general elements such as A, B, C, and D in soil were analyzed. In the study, BERAD decontaminated soil by using water washing. And the particle size of soil was divided into a total of six particle size sections with five sieves: 4 mm, 2 mm, 0.850 mm, 0.212 mm, and 0.075 mm. Concentrations of A, B, C, and D in the soil particles larger than 4 mm are almost the lowest regardless of before and after decontamination by BERAD. For soil particles less than 4 mm, the concentrations of C and D decreased constantly after BERAD decontamination. On the other hand, the decontamination efficiency of A and B decreased as the soil particle became smaller, but the concentrations of A and B increased for the soil particle below 0.075 mm. As a result, decontamination efficiency of one cycle using BERAD for all nuclides in soil particles between 4 mm and 0.075 mm is about 45% to 65 %.
이수인(Suin Lee),최경석(Gyeong-Seok Choi) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-
최근 공동주택 주택 지하주창은 지상의 편의시설 확충을 위해 대부분 지하에 계획되고 있으며, 지하에서 직접 연결되는 계단실 및 E/V 홀을 통해 세대와 연결되도록 구성되어 있다. 따라서 하절기 고온다습한 외기공기의 유입으로 결로 발생의 문제가 발생되고 있다. 서울시의 A 공동주택 단지의 지하주차장을 대상으로 결로발생 현황을 조사한 결과, 2010년의 경우 노점온도가 평균 20.4℃로 실내 온도 평균과 약 3.2℃차이가 있는 것으로 분석되었고, 2011년의 경우 노점온도가 평균 23.1℃로 실내 온도 평균 약 23.1℃의 근소한 차이를 갖는 것으로 나타났다. 따라서 결로 발생율이 2010년의 경우 약 66%, 2011년의 경우 78%로 과반수 이상에서 결로가 발생하는 것으로 판단되어 지하주차장의 결로방지를 위한 개선방안 도출이 시급한 것으로 나타났다.