• 대기
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• 제27권2호
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• pp.189-197
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• 2017

Progressing from weather forecasts and warnings to multi-hazard impact-based forecast and warning services represents a paradigm shift in service delivery. Urban flooding is a typical meteorological disaster. This study proposes support plan for urban flooding impact-based forecast by providing inundation risk matrix. To achieve this goal, we first configured storm sewer management model (SWMM) to analyze 1D pipe networks and then grid based inundation analysis model (GIAM) to analyze 2D inundation depth over the Gangnam drainage area with $7.4km^2$. The accuracy of the simulated inundation results for heavy rainfall in 2010 and 2011 are 0.61 and 0.57 in POD index, respectively. 20 inundation scenarios responding on rainfall scenarios with 10~200 mm interval are produced for 60 and 120 minutes of rainfall duration. When the inundation damage thresholds are defined as pre-occurrence stage, occurrence stage to $0.01km^2$, 0.01 to $0.1km^2$, and $0.1km^2$ or more in area with a depth of 0.5 m or more, rainfall thresholds responding on each inundation damage threshold results in: 0 to 20 mm, 20 to 50 mm, 50 to 80 mm, and 80 mm or more in the rainfall duration 60 minutes and 0 to 30 mm, 30 to 70 mm, 70 to 110 mm, and 110 mm or more in the rainfall duration 120 minutes. Rainfall thresholds as a trigger of urban inundation damage can be used to form an inundation risk matrix. It is expected to be used for urban flood impact forecasting.

• 한국산학기술학회논문지
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• 제15권8호
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• pp.5363-5368
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• 2014

본 논문은 소양호 유역을 대상으로 배수구역의 유달오염부하량을 산정하여 유황 및 계절변화에 따른 소양호 유역에 미치는 기여율을 평가 하였다. 유황변화에 따른 배수구역의 기여율을 보면 인북천 유역의 SS와 T-P 항목이 평수량 이상과 저수량 기간에서 46%와 51%의 기여율을 T-P는 평수량 49.5%, 저수량 기간은 48.5%의 기여율을 보였다. 다음으로 계절 변화에 따른 기여율을 관찰한 결과, 인북천 SS 항목이 전 계절 동안 39.6%에서 44.3%를 T-P는 53.8%로 다른 배수구역에 비하여 높은 기여율을 보였다. T-N은 전 계절에서 내린천 유역이 39.6%에서 44.3%의 기여율을 보였다. 전체적으로 인북천 유역의 SS와 T-P 항목, 내린천의 T-N이 소양호 유역의 오염물질 유출에 높은 기여율을 보였다.

• Clinical Endoscopy
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• 제57권2호
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• pp.246-252
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• 2024

Background/Aims: Endoscopic ultrasound (EUS)-guided hepaticogastrostomy (EUS-HGS) is useful for patients with biliary cannulation failure or inaccessible papillae. However, it can lead to serious complications such as bile peritonitis in patients with ascites; therefore, development of a safe method to perform EUS-HGS is important. Herein, we evaluated the safety of EUS-HGS with continuous ascitic fluid drainage in patients with ascites. Methods: Patients with moderate or severe ascites who underwent continuous ascites drainage, which was initiated before EUS-HGS and terminated after the procedure at our institution between April 2015 and December 2022, were included in the study. We evaluated the technical and clinical success rates, EUS-HGS-related complications, and feasibility of re-intervention. Results: Ten patients underwent continuous ascites drainage, which was initiated before EUS-HGS and terminated after completion of the procedure. Median duration of ascites drainage before and after EUS-HGS was 2 and 4 days, respectively. Technical success with EUS-HGS was achieved in all 10 patients (100%). Clinical success with EUS-HGS was achieved in 9 of the 10 patients (90%). No endoscopic complications such as bile peritonitis were observed. Conclusions: In patients with ascites, continuous ascites drainage, which is initiated before EUS-HGS and terminated after completion of the procedure, may prevent complications and allow safe performance of EUS-HGS.

• Tuberculosis and Respiratory Diseases
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• 제41권2호
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• pp.120-126
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• 1994

연구배경 : 내과적 치료에 반응이 없는 폐농양 환자와 감염성 낭포환자에서 대체 치료방법은 폐농양 환자에서는 페엽절제술과 같은 수술이나 감염성 낭포환자에서는 계속적 항생제 투여였는데, 저자들은 이와같은 경우 직경이 작은 카테타로 국소마취하에 경피적 배농술을 시행하여 그 치료효과와 부작용을 알아 보고자 본 연구를 시행하였다. 방법 : 1주 이상의 항생제를 포함한 내과적 치료에 반응이 없고, 공동의 직경이 6cm 이상인 만성적 기저질환을 가지는 폐농양 환자 9에와 감염성 낭포환자 3예에서 흉부 단순촬영과 흉부 전산화 단층촬영 후 투시하에 seldinger 방법을 사용하여 8.3~12.3 Fr의 카테타를 삽입 후 배농시키면서 임상경과를 관찰하였다. 결과 : 카테타 삽입 후 농흉이 발생한, 폐암과 동반된 1예를 제외한 8예의 폐농양과 3예의 감염성 낭포에서 경피적 배농술 후 임상적 호전을 보였다. 배농 후 평균 1.9일 내 해열되었고, 평균 배농기간은 9.9일이였다. 7예에서 퇴원 후 1~7개월간 외래 관찰되었으며, 재발 등의 문제는 없었다. 결론 : 내과적 치료에 반응이 없는 거대 폐암 환자에게 경피적 배농술은 효과적이고 안전한 방법이므로, 수술보다 우선적으로 고려되어야 하겠다. 그러나 감염성 낭포환자에 대한 경피적 배농술은 본 연구의 결과만으로 내과적 치료보다 더 안전하고 효과적이라고 할 수 없으므로 더 많은 연구가 있어야 하겠다.

• 한국초지조사료학회지
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• 제39권3호
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• pp.141-147
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• 2019

The purpose of this study was to determine the effect of waterlogging duration on the growth characteristics and productivity of forage corn at different growth stages under paddy field conditions. Treatments consisted of waterlogging at two growth stages (V7 or V14) for four waterlogging durations (no waterlogging, 48 hours, 72 hours, and 96 hours, respectively). The V14 growth stage was more vulnerable to waterlogging than the V7 stage. Among the waterlogging durations, the lodging score increased at 48 hours. The stem height of forage corn decreased with the increase in waterlogging duration at the different growth stages (V7 and V14). Increase in waterlogging duration reduced the stem dry matter yield, ear dry matter yield, and total dry matter yield at both growing stages (V7 and V14). The waterlogging treatments at the V14 stage affected ear dry matter yield more than those at the V7 growing stage. Thus, the management of forage corn under paddy field conditions must be strengthened during early (V7) and grain fill stages (V14). When waterlogging occurs, surface and subsurface drainage should be implemented within 48 hours to control (no waterlogging) the groundwater level and, thus, minimize economic losses due to forage corn damage.

• 한국농공학회논문집
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• 제46권5호
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• pp.89-98
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• 2004

The amount of rice yield reduction due to inundation should be estimated to analyse economic efficiency of the farmland drainage improvement projects because those projects are generally promoted to mitigate flood inundation damage to rice in Korea. Estimation of rice yield reduction will also provide information on the flood risk performance to farmers. This study presented the relationships between inundated durations and rice yield reduction rates for different rice growth stages from the observed data collected from 1966 to 2000 in Korea, and developed the rice yield reduction estimation model (RYREM). RYREM was applied to the test watershed for estimating the rice yield reduction rates and the amount of expected average annual rice yield reduction by the rainfalls with 48 hours duration, 10, 20, 50, 100, 200 years return periods.

• Clinical and Experimental Pediatrics
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• 제53권5호
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• pp.666-668
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• 2010

Pyogenic liver abscesses are rare in children. In pediatric patients, altered host defences seem to play an important role. However, pyogenic liver abscess also occurs in healthy children. We experienced a case of pyogenic liver abscess in a healthy immunocompetent 10-year-old-girl. The patient presented two distinct abscesses: one subphrenic and the other intrahepatic. The intrahepatic abscess resolved with percutaneous drainage and 3 weeks of parenteral antibiotic therapy but the subphrenic abscess which could not be drained needed prolonged parenteral antibiotic therapy in addition to oral antibiotic therapy. We performed follow-up serial CT scan of the abscess cavity to decide on the duration of antibiotic therapy. Here we present this case with a brief review of the literature.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2011년도 학술발표회
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• pp.473-473
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• 2011

Group method of data handling neural networks model (GMDH-NNM) is used to estimate daily reference evapotranspiration (ETo) using limited climatic variables such as max temperature ($T_{max}$), min temperature ($T_{min}$), mean wind speed ($W_{mean}$), mean relative humidity ($RH_{mean}$) and sunshine duration (SD). And, for the performances of GMDH-NNM, it consists of training and test performances, respectively. The training and test performances are carried out using daily time series data, respectively. From this research, we evaluate the impact of GMDH-NNM for the modeling of the nonlinear time series data. We should, thus, construct the credible data of the daily ETo data using GMDH-NNM, and can suggest the methodology for the irrigation and drainage networks system. Furthermore, this research represents that the strong nonlinear relationship such as ETo modeling can be generalized using GMDH-NNM.

• 대한기관식도과학회지
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• 제9권2호
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• pp.49-55
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• 2003

Background and Objectives : Traditionally incision and drainage is considered to be standard treatment of deep neck infection. But antibiotics and diagnostic technique are developed recently, there are reports that conservative therapy could be as successful as open surgical drainage. The purposes of this study has been to assess clinical feature between surgical therapy group and conservative therapy group through statistical analysis. Materials and Methods : A retrospective study was performed on 46 cases of deep neck space abscess, which were confirmed CT, in patients admitted from January 1999 to June 2002. Result : About 80% of all are treated with conservative therapy. Erythrocyte sediment rate, volume of abscess and duration of hospitalization of conservative therapy group are decreased than those of surgical therapy group. Conclusions : Conservative therapy is expected to be effective on treatment of early stage, small sized deep neck infection. But its complication can lead to serious condition of patient it should be done under meticulous observation.

• 대한토목학회논문집
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• 제2권1호
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• pp.53-62
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• 1982

본(本) 연구(硏究)는 우리 나라 전역(全城)에 걸쳐 자연상태(自然狀態) 혹은 농촌지역(農村地城)에 있어서의 소규모(小規模) 지역(地城) 배수(排水)를 위한 수문(水門)의 설계(設計) 배수량(排水量)을 결정(決定)하는 실용적(實用的) 방법(方法) 개발(開發)하기 위한 기초연구(基礎硏究)로서 장기간(長期間)의 비교적 정확한 단시간(短時間) 호우자료(豪雨資料)를 보유(保有)하고 있는 지표지점(指標地點)을 서울로 선택하여 단시간(短時間) 호우(豪雨) 최대우량(最大雨量)-지속기간(持續期間)-재현기간관계(再現期間關係)를 수립하고 전국(全國)에 산재해 있는 우량관측소(雨量觀測所)의 일우량(日雨量) 자료(資料)의 빈도분석(頻度分析)에 의해 전국(全國)을 몇 개의 유이(類以) 강우특성(降雨特性) 지역(地城)으로 구분(區分)하여 구분(區分)된 강우특성(降雨特性) 지역(地城)과 지표지점(指標地點)의 50년(年) 확률일우량(確率日雨量)에 의해 각(各) 지역(地域)의 강우능(降雨能) 계수(係數) 결정(決定)하였다. 또한 토지이용상태(土地利用狀態)와 토양형(土壤型)에 따라 그 유역(流域)을 대표(代表)하는 유출수(流出數)를 결정(決定)하고 재현기간별(再現期間別)로 유출수(流出數) 및 강우지속기간(降雨持續期間)에 따른 유출능계수(流出能係數)를 결정(決定)할 수 있는 노모그램을 작성(作成)하였다. 유역(流域)의 잠재유출량(潛在流出量)은 단위유량도(單位流量圖)의 기본이론(基本理論)에 의거 대상지역(對象地域)의 강우능계수(降雨能係數)와 유출능계수(流出能係數) 및 유역면적(流域面積)의 적(積)으로 표시하였으며 최대잠재유출량(最大潛在流出量)의 결정절차(決定節次)도 제시(提示)하였다.