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Minjeong Lee(Minjeong Lee),Hyojung Bae(Hyojung Bae),Hokyun Rho(Hokyun Rho),Vishal Burungale(Vishal Burungale ),Pratik Mane(Pratik Mane ),Chaewon Seong(Chaewon Seong),Jun-Seok Ha(Jun-Seok Ha) 한국마이크로전자및패키징학회 2020 마이크로전자 및 패키징학회지 Vol.27 No.4
The Cu/Cu2O/CuO photoelectrode has been successfully fabricated by Rapid Thermal Annealing technique. The structural characterization of fabricated photoelectrode was performed using X-Ray diffraction, while elemental composition of the prepared material has been checked with X-Ray Photoelectron Spectroscopy. The synthesis parameters are optimized on the basis of photoelectrochemical performance. The best photoelectrochemical performance has been observed for the Cu/Cu2O/CuO photoelectrode fabricated at 550 ℃ oxidation temperature and oxidation time of 50 seconds with highest photocurrent density of -3 mA/㎠ at -0.13 V vs. RHE.
A predictive factor of total operation time for robotic-assisted laparoscopic myomectomy
( Chaewon Kim ),( Seong Eun Bak ),( Kyung-min Park ),( Suk-il Kim ),( Mee-ran Kim ) 대한산부인과학회 2019 대한산부인과학회 학술대회 Vol.105 No.-
Objective: The aim of our study is to find out the predictors of TOT in RALM. It will help selecting an adequate patient pool, enhancing preoperative counseling, optimizing operation schedule, and systemizing the intraoperative preparation process, thus improving the perioperative outcomes and patients’ satisfaction. Methods: We conducted a retrospective cohort study of women undergoing RALMs between April 2009 and May 2019 by a single high-volume gynecologic surgeon at the Seoul St. Mary’s hospital. Cases that were performed concomitantly with any other surgical procedure were excluded. Demographic data and intraoperative records were obtained. The association between the number, size, location, FIGO type of myoma and TOT was analyzed. Results: A total of 616 cases met our criteria, with a mean TOT of 234 ± 88 minutes. The mean age of patients was 36.0 ± 5.4. The mean number of myomas removed was 4.2 ± 4.0 and mean largest myoma diameter was 7.7cm ± 2.6cm. Mean total weight of myoma removed was 201.4 ± 151.7g. Only one patient underwent conversion to laparotomy. Preoperative factors intimately associated with TOT were identified with the multiple regression analysis. TOT prolonged as the number of myoma increases (β = 11.69, P < 0.0001) or total myoma weight increases (β = 0.18, P < 0.0001). If the endometrial cavity was exposed during the operation, longer surgery time was needed (β = 23.62, P = 0.002). Age, parity, body mass index, personal history of hypertension and diabetes mellitus, previous abdominal surgery, surgical indication, location of dominant myoma and classification of dominant myoma were not associated with TOT. Conclusion: In this study, we found the total number of myomas, myoma weight, and exposure of endometrial cavity to be significantly correlated to TOT of RALM.
CFD 모사 기법을 이용한 막 모듈 배관 설계 적정성 평가에 관한 연구
김채원(Chaewon Kim),윤석민(Sukmin Yoon),김성수(Seong-Su Kim),김종은(Jongeun Kim),박노석(No-Suk Park) 대한환경공학회 2018 대한환경공학회지 Vol.40 No.3
본 연구에서는 CFD모사와 실험을 통해 저압막이 병렬 배열된 막모듈로 유입되는 구조를 가진 다지관을 대상으로 수리구조를 개선하여 각 모듈로 유입되는 유입유량을 균등하게 분포시킬 수 있는 방안을 제시하고자 하였다. 모듈로 유입되는 유입유량을 균등하게 분포시킬 수 있는 방안을 CFD로 설계한 결과, 헤더 배관 내에 오리피스 배관을 하나 더 설치하는 이중배관원리를 적용함으로써 다지관에서 막모듈로 유입되는 유입유량의 변동계수가 약 76% 감소됨을 확인 하였다. 또한 CFD의 결과를 검증하기 위한 실험에서도 변동계수가 약 50% 감소함으로써 내부에 요철이 있는 오리피스 내관을 설치하는 것이 효과가 있다는 것을 확인하였다. This study was conducted to suggest the hydraulic modification for improving evenness of inlet flow distribution into the manifold pipe having a structure in which the treated water flows in parallel arranged membrane modules using CFD (Computational Fluid Dynamics) simulation and experiment. From a result of CFD simulation, it was confirmed that the standard deviation of the inlet flows into each membrane module from the manifold pipe was reduced by about 76% by installing other orifice pipe inside header pipe (double piping header). In addition, the experimental results showed that the coefficient of variation was reduced by 50% in the case of double piping header compared to the case of single piping header. Consequently, the design concept of doubling header pipe with rough internal pipe is much effective to improve the evenness of the flow distribution rate in parallel arranged membrane modules.
Global trait gene discovery and marker development in Korean rice varieties
Hyeonso Ji,Kyeong-Seong Cheon,Yunji Shin,Hyoja Oh,Chaewon Lee,Dong-Kyung Yoon,Young-Min Jeong,Young-Il Cho,Gang-Seob Lee,Il-Pyung Ahn,Yong-Jae Won,Eok-Keun Ahn,Hoon Jang,Yong-Chan Park,Kyung-Yun Kim,H 한국육종학회 2024 한국육종학회 학술발표회지 Vol.2024 No.6