식도 정맥류 출혈을 동반한 간섬유증 1례

신동수,임시홍,Shin, Dong Soo,Lim, Si Hong 대한소아소화기영양학회 2004 Pediatric gastroenterology, hepatology & nutrition Vol.7 No.1

Congenital hepatic fibrosis is an inherited, congenital disorder of the liver characterized by portal hypertension and hepatic fibrosis. We experienced a case of congenital hepatic fibrosis with esophageal varix in a 9-year-old male. He complained hematemesis, hematochezia, dizziness. In laboratory examination, AST/ALT was slightly increased. Esophageal varix was noted by an endoscopic examination. Hepatosplenomegaly and hypoechoic lesion of periportal area were seen by abdominal CT scanning. Histologic finding of liver biopsy showed fibrous tracts containing dilated bile ductules connecting adjacent portal spaces that were widened by mature fibrosis. Endocopic sclerotherpy and ligation was done. We summarized a case with review of literatures

SWMM-LID를 이용한 상습침수유역 내 유출저감효과 분석

신동수,박재범,강두기,조덕준,Shin. Dong Soo,Park. Jae Beom,Kang. Doo Kee,Jo. Deok Jun 한국방재학회 2013 한국방재학회논문집 Vol.13 No.4

최근 기후변화에 의한 기상현상은 국지성 집중호우, 돌발홍수 등을 발생시켜 많은 인명과 재산의 피해를 가져오고 있다. 이로 인해 기록적인 폭우의 발생이 증가되고 있으며, 도시개발로 인해 자연공간이 감소하여 개발 전 지표면이 가지고 있던 유역 내 저류 및 지연효과가 현저하게 감소하고 시가지의 확대와 도로포장 등 유역 내 불투수층의 증가로 인하여 홍수유출량과 첨두유량이 점차 증가되고 있다. 이와 같은 원인으로 유출 출구점까지의 도달시간은 자연유역에 비해 현격하게 짧아져 과거 자연하천 유역과는 다른 수문학적 특성을 가지게 되며, 도시집중 현상으로 택지 및 시설부지의 부족현상이 가중됨으로써 하천범람 구역이나 홍수우려가 있는 범람원내 저지대까지 도시화가 이루어짐으로써 치수상 안전도가 상대적으로 저하되고 있다. 이에 본 연구에서는 도시유출해석모형인 SWMM 내 LID 모듈을 이용하여 대상유역내 적용 가능한 LID 기법 기술요소를 분석하여 적용하고 LID 기법에 따른 유출저감효과를 분석하였다. 분석결과, LID 영향 분석 시나리오는 각 기법의 적용에 따른 영향과 LID 적용전, 옥상녹화적용, 투수성포장의 적용 등 LID 3개의 시나리오를 선정하여 적용하였다. 시나리오 적용결과, 시나리오 A에 비하여 시나리오 B는 288.52ton, 시나리오 C는 240.26ton이 저감되었으며 각각 15.62%, 13.01%의 유출량 저감효과를 보였다. Recently meteorological phenomena caused by climate change have brought localized heavy rainfalls, flash-floods causing severe damage for human-life and property. They also increase the occurrence of record-breaking rainfall. Development in urban area decreases the portion of open spaces, landscapes, leading to significant diminution of storage and detention function of the basin. The expansion of impervious areas increases the extent of peak-runoff and runoff volume, especially the shorter time of concentraion due to development makes the basin have different hydrological characteristics compared to pre-development. In addition, urbanization worsen the requirement of site for residence and public facility so that even floodplain and inundated district are urbanized threatening safety for flood control. In this study, applicable LID techniques are analyzed and implemented using LID modules of SWMM, which is the model for urban stormwater-runoff management in the project area. Effects of implementing LID practices are also assessed and reviewed. The result shows that scenario B and C ruduced 288.52ton(15.62%), 240.26ton(13.01%) each in runoff simulations compared to scenario A.

Farnesol의 입체선택적 합성

신동수,Dong-Soo Shin 대한화학회 1992 대한화학회지 Vol.36 No.4

5-Bromo-2-methylpent-2-ene(2)을 출발물질로하여 farnesol인 (2E, 6E)-3,7,11-trimethyldodeca-2,6,10-trien-1-ol(1)의 입체 선택적 합성을 수행하였다. 5-Bromo-2-methylpent-2-ene(2)을 요오드화시킨 후, 5-lithio-2,3-dihydrofuran과 반응시켜 5-(4-methylpent-3-enyl)-2,3-dihydrofuran(4)을 얻었다. Dihydrofuran 4를 MeMgI와 Ni(O)-촉매 짝지음 반응시켜 (3E)-4,8-dimethylnona-3,7-dien-1-ol(5)을 72%의 수율로 얻었다. 알릴알코올 5를 4단계로 거쳐 (5E)-6,10-dimethylundeca-5,9-dien-2-one(8)으로 변환시켰다. 화합물 8을 벤젠 용매하에서 dimethylmethoxycarbonylmethylphosponate와 반응시킨 다음, 에탄올 용매하에서 $NaBH_4$로 환원시켜서 (2E, 6E)-3,7,11-trimethyldodeca-2,6,10-tiren-1-ol(1)을 얻었다. Dihydrofuran 4와 MeMgI와의 Ni(O)-촉매 짝지음 반응이 본 연구의 farnsol(1)의 합성에서 중요한 단계이다. Stereoselective synthesis of farnesol, (2E, 6E)-3,7,11-trimethyldodeca-2,6,10-tiren-1-ol(1), was carried out using 5-bromo-2-methylpent-2-ene(2) as a starting material. After conversion of 5-bromo-2-methylpent-2-ene(2) to the corresponding iodide compound, 5-(4-methylpent-3-enyl)-2,3-dihydrofuran(4) was obtained by alkylation of 5-lithio-2,3-dihydrofuran with 5-iodo-2-methylpent-2-ene. Ni(0)-catalyzed coupling reaction of the dihydrofuran 4 with MeMgI was proceeded to give (3E)-4,8-dimethylnona-3,7-dien-1-ol(5) in 72% yield. The resultant homoallylic alcohol 5 was converted to the (5E)-6,10-dimethylundeca-5,9-dien-2-one(8) in 4 steps. Compound 8 was condensed with dimethylmethoxycarbonylmethylphosponate in benzene follwed by $NaBH_4$ reduction in EtOH to yield (2E, 6E)-3,7,11-trimethyldodeca-2,6,10-trien-1-ol(1). Ni(0)-catalyzed coupling reaction of MeMgI with dihydrofuran 4 was a key step in this synthesis of farnesol(1).

서보모터의 가감속형태에 따른 운도오차에 관한 연구

신동수,정성종,Shin, Dong-Soo,Chung, Sung-Chong 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.10

This paper describes motion errors due to acceleration and deceleration types of servo motors in NC machine tools. Motion errors are composed of two components : one is due to transient response of a servomechanism and the other comes from gain mismatching of positioning servo motors. It deals with circular interpolation to identify motion errors by using Interface card. Also in order to minimize motion errors, this study presents an effective method to optimize parameters which are connected with motion errors. The proposed method is based upon a second order polynomial regression model and it includes an orthogonal array method to make the effective results of experiments. The validity and reliability of the study were verified on a vertical machining center equipped with FANUC 0MC through a series of experiments and analysis.

수리모형실험을 통한 복합지하공간 침수방지대책 영향 평가

신동수,박재범,손태석,조덕준,Shin. Dong Soo,Park. Jae Beom,Shon. Tae Seok,Jo. Deok Jun 한국방재학회 2012 한국방재학회논문집 Vol.12 No.4

도시기능의 다양화는 복합 지하공간에 대한 개발과 수요를 증가시키고 있으며, 기후변화로 인한 집중호우 등으로 복합 지하공간의 침수 가능성은 더욱 높아지고 있는 상황으로 지하공간에서의 침수피해를 최소화하기 위한 다양한 침수방지 대책이 필요하다. 최적의 침수방지 대책 수립을 위해서는 수리 및 수치모형 실험등을 통하여 침수방지 대책별 지하공간에서의 흐름특성에 대한 연구가 필요하나 국내에서는 이에 대한 연구가 미흡한 실정이다. 본 연구에서는 지하공간 침수위험성이 존재하는 유역을 대상으로 EPA SWMM 모형을 구축하여 유출해석을 수행하고 그 결과를 복합지하공간에 대한 침수유량으로 적용하였다. 또한, 지하저류시설, 모래주머니, 차수벽 등의 침수방지대책을 고려한 시나리오를 구축 후 수리모형실험을 통해 주요 지점별 침수수위 변화를 파악함으로써 지하 공간의 침수위험도를 분석하였다. Variation of the urban functions on complex underground space development and increasing demand, and due to heavy rainfall caused by climate changing, flooding in complex underground space into a situation where the possibility of more increases to minimize flood damage in underground space for various requires measure to prevent flooding. In order to establish the optimal protect against flooding, a study uses the hydraulic and numerical model experiments, and each inundation measures the flow characteristics in an underground space required for the research and studies in a Korea, however, it has been little. In this study, the risk of flooding underground space in the presence of EPA SWMM model basin runoff analysis to build up complex underground space and the results were applied at a flow rate on flooding. Not only the study calculated the experimental value every scenario through checking whether there is storage facility or not, the installation of the sand bag and barrier wall by making the underground space of special building which mainly affected by the quantity of runoff in the object basin into hydraulic model, but also tried to analyze the flooding tendency of the underground by figuring out water level change of the Inundation.

Can(Controller Area Network)통신을 이용한 자동차 전자부품의 개발

신동수(Shin Dong Soo),김병태(Kim Byung Tae),봉재경(Bong Jae Kyung) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11

In order to achieve unmanned manufacturing for FMS (Flexible Manufacturing<br/> System) or CIM, the research for performance enhancement of control of batch process is<br/> required. This paper describes CAN application about mechanical design, tooling,<br/> injection and design of circuit for automotive part. Also, it is showed that the strategies,<br/> which are used for development, can be explained by using communication, modulation<br/> and concentration for manufacturing system.

NC 공작기계용 DNC SYSTEM 개발

신동수(SHIN-DONG SOO),정성종(Chung-Sung Chong) 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10

In this study, it is developed the Interactive DNC (Direct Numerical Control) System, in using RS-232C cable and auxiliary computer, through the diagnosis of planning process and information evaluation. This DNC system recognize the Manufacturing Planning and control it. This DNC System has a different rotation. It. can be done by an operator who hasn't knowledge about personnel computer. It is operated with automatic planning and measurement etc. by operator, using Part Program on the NC (Numerical Control).

CAN(Controller Area Network) 통신을 이용한 자동차 전자부품의 개발

신동수(Shin Dong-Soo),김병태(Kim Byung-Tae),봉재경(Bong Jae-Kyung) 대한기계학회 2002 대한기계학회 기타 간행물 Vol.2002 No.11

점착성 퇴적물의 침강특성에 관한 연구

신동수(Dong-Soo Shin),배기성(Ki-Seong Bae) 한국해양공학회 1998 韓國海洋工學會誌 Vol.12 No.2

Laboratory settling experiments (column, recirculating flume) were conducted for further understanding of the physical processes of cohesive sediment transport.<br/> In still water experiments, the growth rate of flocculation is dependent upon the initial suspended concentration. Consequently, the settling velocity increases with concentration of flocs. In flocculation settling regime, the exponent n in the settling velocity, ωs=k Cⁿ, for Nakdong estuary mud was obtained empirically. The exponents were found to be 1.33, and 1.06 for the initial suspended concentrations of 1 g/ℓ and 3 g/ℓ, respectively.<br/> In flowing water, experiments for the median settling velocity with Nakdong mud in a recirculating flume were conducted. Settling velocity was found to depend much more strongly on the current velocity than initial concentrations. The temporal variation of suspended concentration increases as current velocity decreases.

토목인생 50년

신동수(Dong-Soo Shin) 대한토목학회 2009 대한토목학회지 Vol.57 No.10