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리튬이온전지의 전해액 자체 난연성 평가시 측정변수 및 실제 전지 환경 모사에 따른 영향
박승수(Seungsoo Park),김건영(Gunyoung Kim),이홍경(Hongkyung Lee) 한국전지학회 2023 한국전지학회지 Vol.3 No.2
This study emphasizes the importance of realistically simulating the actual cell environment, which can be overlooked in fire resistance evaluations, and underscores the lack of standardization in measurement variables. We investigated variables that should be considered to minimize deviations during measurements. Additionally, we simulated the cell environment to observe changes under higher O₂/Ar ratios and conducted research on Solid-Electrolyte Interphase (SEI) components contributing to fire resistance. Furthermore, we explored the effects of graphite anode degradation on measurement variations and provided insights into various considerations essential for fire resistance assessments.
변형 Konno 술식을 이용한 죄심실 유출로 협착의 수술치험 - 3례 보고 -
박승일,김용진,Park, Seung-Il,Kim, Yong-Jin 대한흉부심장혈관외과학회 1990 Journal of Chest Surgery (J Chest Surg) Vol.23 No.1
The results of conventional operative resection of diffuse subaortic stenosis[tunnel subaortic stenosis] have been less than satisfactory. We have performed modified Konno operation to enlarge the outflow tract of both ventricle with a patch in three patients with diffuse tunnel subaortic stenosis in the department of Thoracic and Cardiovascular Surgery, Seoul National University Children`s Hospital. Preoperative left ventricular aortic pressure gradients were 135 mmHg, 50 mmHg, 80 mmHg respectively in these patients. After right ventriculotomy, the septotomy was done and extended beyond the limit of the stenosis and fibrous and/or muscular tissue was removed from each edge of septal incision. After adequate widening of the tunnel subaortic stenosis with various patches, right ventricle was closed primarily or with prosthetic patches successfully. One patient who was diagnosed as complete atrioventricular septal defect had complete AV block preoperatively and was implanted permanent pacemaker, and others who were sinus rhythm preoperatively have no serious postoperative rhythm disturbance. One patient developed mild postoperative aortic insufficiency and one who had preoperative aortic insufficiency has still same grade of aortic insufficiency after operation. All had good postoperative hemodynamics without any postoperative residual pressure gradient.
SMIL의 메타모델을 이용한 멀티미디어 교육컨텐츠 설계
박승범 ( Seung-beom Park ),박기창 ( Ki-chang Park ),김철현 ( Cheol-hyeon Kim ),송호영 ( Ho-young Song ),김병기 ( Byung-ki Kim ) 한국정보처리학회 2006 한국정보처리학회 학술대회논문집 Vol.13 No.2
SMIL(Synchronized Multimedia Integration Language)은 멀티미디어 객체들의 시간적, 공간적 배열이 가능한 XML기반의 언어로서 웹브라우저상에서 효과적인 멀티미디어 표현을 가능하게 한다. 기존의 교육시스템에서는 멀티미디어컨텐츠의 동기화표현이 불가능하거나 별도의 클라이언트 어플리케이션이 필요하였다. 본 논문에서는 멀티미디어 통합 언어인 SMIL의 메타모델을 분석하고 적용한 교육컨텐츠의 개발을 제안하고, 별도의 플러그인이나 어플리케이션이 필요없이 브라우저상에서 표현가능한 멀티미디어 교육컨텐츠를 설계하였다.
대량의 태아-모체간 출혈이 동반된 Anti-Mia에 의한신생아 동종 면역성 용혈성 질환 1례
박승원 ( Seung Won Park ),박재한 ( Jae Han Park ),김령 ( Young Kim ),유주희 ( Ju Hee You ),조형민 ( Hyeong Min Cho ),김은영 ( Eun Young Kim ),김경심 ( Kyoung Sim Kim ),김용욱 ( Yong Wook Kim ) 대한주산의학회 2013 Perinatology Vol.24 No.4
Authors experienced a newborn treated with severe anemia transferred to our hospital due to pulselessness and apnea shortly after birth. Laboratory analysis of the blood on admission revealed hemoglobin 3.1 g/dL, reticulocyte 11.0%. Kleihauer-Betke test for fetal hemoglobin from maternal blood was seen Hgb F 7%, then we suggested almost 180 ml fetomaternal hemorrhage. But, anemia was not improved despite repeated packed RBC transfusion. So, we evaluated the other cause of intractable anemia. The results were as follows; the Coombs` test was positive. The antibody identification test using mother`s serum revealed anti-Mia antibody. The patient improved with supportive treatment, but got hypoxic brain injury due to massive fetomaternal hemorrhage. At day 29, the infant was doing well and was discharged. We report a case of neonatal isoimmune hemolytic disease due to anti-Mia with massive fetomaternal hemorrhage with a brief review of the related literatures.
박승정,유현주,최희석,서병윤,양선호,김영훈,정재열,이기남,Park Seung-Joung,Yoo Hyun-Ju,Choi Hee-Seok,Seo Byeong-Yun,Yang Seon-Ho,Kim Yeong-Hun,Jeong Jae-Yeal,Lee Ki-Nam 대한예방한의학회 2004 대한예방한의학회지 Vol.8 No.2
1. The cell viability was determined by MTT method. Their cytotoxic activities against three cancer cell lines such as A549, MDA-MB-231 and SNU-C4 cell line were tested. Among them, The methanol extract of Saururus chinensis Baill. showed the strongest cytotoxic effect against SNU-C4 cells. These results suggest that the methanol extract of Saururus Chinensis Baill. possessed a potential antitumorous agent. 2. In vitro the antitoxic activity of ethanol extract of Saururus Chinensis Bail on NIH 3T3 fibroblasts was evaluate by the MTT (3-(4,5-dimethyl- thiazol-2-yl)-2,5-diphenyl-2H-tetra캐lium bromide) and SRB (sulforhodamine B protein) assays. The number of NIH 3T3 fibroblasts were increased and tend to regenerate. These results suggest that Saururus Chinensis Bail extract retains a potential antitoxic activity. 3. Complexation of Cd (II) ion with ligands such as quercetin has been determined by UV-vis spectrophotometric method in tris buffer solution at various pH. It was found that only 1 : 1 Cd-complex is formed by the interaction between catechol moiety in ring B and cadmium [Cd(II)] in aqueous solution. The spectral parameters for Cd-complex were determined by Beer's law at various pH. It has shown that 1 : 1 Cd-complex has a maximum absorbance and red shift by the alkaline pH.
선천성 심장기형 환자에서 조기술후 심실 전부하 용적과 심박출량의 상호 관계 및 혈역학적 변화 분석
박승일,김응중,김용진,Park, Seung-Il,Kim, Eung-Jung,Kim, Yong-Jin 대한흉부심장혈관외과학회 1990 Journal of Chest Surgery (J Chest Surg) Vol.23 No.1
Postoperative cardiac performance of cyanotic congenital heart disease is somewhat different from that of other cardiac diseases. For the evaluation of postoperative cardiac performance in the cyanotic congenital heart disease we measured cardiac output by thermodilution technique at 1, 4, 8, 12, 16, 20, 24, 36, 48 postoperative hours in 14 patients operated from Feb. 1989 to Nov. 1989 in The Department of Thoracic and Cardiovascular Surgery, Seoul National University Children`s Hospital. At the same time, we checked left atrial pressure [LAP], central venous pressure [CUP], and mixed venous oxygen saturation [SvO2] to detect correlation between them. Immediate postoperative cardiac index was 3.585 $\pm$ 0.945 L/min/m2, and it decreased maximally to 3.322$\pm$1.007 L/min/m2 at postoperative 16 hours. After then it increased and stabilized from 36 hours after operation, and its value was 4.426$\pm$1.358 L/min/m2. There were no correlations between cardiac index and left atrial pressure or central venous pressure. Between mixed venous oxygen saturation and cardiac index, there was no correlation in the early postoperative period but after postoperative 16 hours, there was significant correlation between them and correlation coefficients were 0.573 [16hrs], 0.743 [20hrs], 0.436 [24hrs], 0.560 [36hrs], 0.636 [48hrs], respectively. From these results, we concluded that in the corrective surgery of cyanotic congenital heart disease, cardiac performance was depressed in the early postoperative period. It improved from postoperative 16 hours, and stabilized from 36 hours after operation. During early postoperative period, mixed venous oxygen saturation should not be used as a predictor of cardiac performance but it could be used as a predictor of cardiac performance from 16 hours after operation.
변형 Blalock-Taussig 수술법이 폐동맥성장에 미치는 영향
박승일,김용진,Park, Seung-Il,Kim, Yong-Jin 대한흉부심장혈관외과학회 1989 Journal of Chest Surgery (J Chest Surg) Vol.22 No.2
Modified Blalock-Taussig operation remains the standard technique of systemic-to-pulmonary artery shunt in patients of congenital heart disease with decreased pulmonary blood flow. We reviewed the 41 patients who had been performed modified Blalock-Taussig operation from March 1985 to Feb. 1988, and angiographically measured pulmonary artery size before and after shunt, and calculated pulmonary artery index [PAI] and ratio of left and right pulmonary artery to descending aorta[[LPA+RPA]/dAo]. The mean duration of palliation after shunt operation was 624 days and mean age of the patient at shunt operation was 3.59 years. Mean PAI increased significantly from 131.15*67.11 mm2/M2 preoperatively to 232.70*84.46 mm2/M2 postoperatively. Mean ratio of right and left pulmonary artery to descending aorta also increased significantly from 1.48*0.40 preoperatively to 1.92*0.50 postoperatively. All patients manifested clinical improvement; there was mean decrease in hematocrit of 8.95%, mean increase in arterial oxygen saturation of 11.08%. Pulmonary arterial growth was not influenced by age at operation, initial pulmonary artery size, or graft size, but significantly influenced by antegrade flow. The patients who have some antegrade flow were in more increase of PAI. There were no linear correlation between change of PAI, change of [[LPA+RPA]/dAo], SaO2, and duration. But, according to Scatterplot between change of PAI and duration, some complex correlation was suggested and mean PAI was decreased after 2-year palliation. We concluded that modified Blalock-Taussig operation is excellent palliative surgery for pulmonary artery growth especially on the patient who have some antegrade flow, and the proper duration of palliation was about 2 years.