도시유역의 침수방지를 위한 유수지 능력개선에 관한 연구

이영화,조현경 慶山大學校 1998 論文集 Vol.16 No.1

This study aims at the capability improvement of detention basin for inundation prevention of urban area by RRL model. The chosen detention basin to analyze in this study is located at Pohang industrial district. The RRL model is computed a probable flood to evaluate the capability of detention basin for each return period. The results obtained by RRL model as follows: (1) The capabilities of detention basin and pumps are estimated. (2) To improve the capability of the detention basin, the dredged depth of the detention basin and the number of pump are calculated for return period.

河川流域에서의 SED 降雨-流出모델

李舜鐸,趙顯景 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.2

This study aims at the development of rainfall-runoff model for analyzing runoff phenomenon in river basins. The model which is used at the analysis are SED(Storage-Effective Drainage) Model in nonlinear model. The parameters was calculated by regression equation and trial and error method. In this study, it was applied SED Model to analysis on the six self-recording stations in the Wi stream watershed in Nakdong river. And it gives good results in stream phenomenon decreasing the physical uncertainties of runoff process.

SED 降雨-流出모델에서의 媒介變數 推定

李舜鐸,趙顯景 嶺南大學校 環境問題硏究所 1996 環境硏究 Vol.15 No.2

요약문 본 硏究는 河川流域에 適用하기 위한 降雨-流出모델의 媒介變數 推定을 위한 方法을 確立하는데 그 目的을 두고 있다. 어떤 降雨-流出모델을 實際流域에 適用하기 위해서는 수많은 媒介變數들이 필요하다. 그러나 流域의 상황을 近似하기 위한 이들 媒介變數들을 실제로 測定할 수가 없는 경우가 대부분이기 때문에 降雨-流出 資料로부터 推定하는 方法을 사용할 수 밖에 없는 실정이다. 이를 위한 方法으로 모색되고 있는 것이 最適化 技法인데, 본 硏究에서는 Flecher-Powell 方法과 Resenbrock 方法이 제시되었다. 본 硏究에서는 이들 方法은 SED(Storage-Effective Drainage) 모델을 實際流域에 適用하는데 필요한 浸透媒介變數 SM, Ks와 初期貯油高 y1n을 推定하기 위하여 이용되었다. AbstractThis study presents techniques for the estimation of parameters in rainfall-runoff mod-els. In the practical application of models a number of catchment parameters are not directly measureable and it is desirable to make the best possible estimate from known rainfall-runoff data. Two techniques (Flecher-Powell method and Rosenbrock method) are pre-sented. These methods are used to minimize the sum of the absolute errors of the computed hydrograph. The techniques are demonstrated by a real catchment for which rainfall-run-off series are generated with a SED model. Three parameters (.SM, K, and y,n) necessary for the model's operation are then estimated.

河川流域에서의 分布型모델에 의한 降雨-流出解析

李舜鐸,趙顯景 嶺南大學校 環境問題硏究所 1995 環境硏究 Vol.15 No.1

본 論文은 降雨를 地表面 流出로 轉換하는 分布型모델인 Cell모델의 이론을 설명하고 실제 유역에 적용 분석하였다. Cell모델에서 單位流域은 地形圖에 따라 결정되며, 셀의 수는 格子모델이 많은 수의 單位流域을 사용하는 것에 비하면 비교적 적은 편이다. Cell모델은 流域에서의 降雨觀測所에서 기록된 연관성 있는 모든 降雨資料들을 가지고 流域出口에서 地表面流出 水文曲線을 구한다. 만약 어떤 流域에서 측정된 유효한 地表面 流出에 관한 資料가 있다면 이 모델은 그 셀에서 計算한 값과 비교해 볼수 있다. 전체과정은 超過降雨量의 計算, 超過降雨量으로 부터의 地表面流出量 算定, 河道流入量의 追跡, 河道損失의 計算등이다. 본 硏究는 目的函數인 殘差의 제곱합에 대해 豪雨에 대한 水文曲線을 解析하고 보정하였다. This study introduces the general outline of Cell Model, a parametric, semi-distributed, quasi-linear model, for conversion of rainfall into surface runoff. The model considers the watershed as a series of interconnected cell units, each representing a specific portion of the area of the watershed. In contrast to grid models using a large number of rectangular elements or cells, the number of cells in Cell Model is relatively small and their boundaries are chosen according to the watershed topography. For each cell, the model computes the surface runoff hydrograph at the cell outlet, related to a specified record of total rainfall data at a number of rain gauges. If measured surface runoff data are available for some locations in the watersheds, the model can compare these data with computed values of surface runoff at the corresponding points of the Cell Model. Detailed descriptions are provided for the main model procedures-computation of rainfall excess, conversion of rainfall excess into surface outflow, routing the channel inflow and subtraction of channel losses. This study is also concerned with a technique for calibrating and testing a model of storm hydrograph with emphasis on objective functions.

p-Anisaldehyde가 조골세포 분화에 미치는 영향

김경민 ․ 이도원 ․ 김현준 ․ 김아랑 ․ 장원구 대구대학교 산업기술연구소 2018 産業技術硏究 Vol.29 No.2

p-Anisaldehyde is a natural fragrance extracted from Pimpinella anisum L., and used as a preservative. This study examined the effect of p-anisaldehyde on osteoblast differentiation. First, cytotoxicity tests were carried out after examining the concentrations that did not show toxicity to the cells. The expression of osteoblast differentiation marker gene was confirmed by RT-PCR and was not effective in the treatment with p-anisaldehyde alone. However, p-anisaldehyde decreased the expression levels of inhibitor of differentiation-1 (Id1), distalless related homeobox (Dlx5), and runt-related transcription factor 2 (Runx2), which are osteogenic differentiation marker genes, which are increased in osteogenic condition. alkaline phosphatase (ALP) activity was also confirmed by ALP staining that p-anisaldehyde reduced ALP activity. These results show that p-anisaldehyde is effective in reducing osteoblast differentiation.

신주위 공간 및 요근을 침범한 췌장성 가성낭포 1례 : 진단및 경피적 배액술 Diagnosis and Percutaneous Drainage

이현경,오연희,이원재,한동선,오민구,이성우,박수성 동국대학교 경주대학 1993 東國論集 Vol.12 No.-

Pancretic pseudocyst is a well-known complication of pancreatitis and may occur in unusual locations. Involvement of the left perirenal space and psoas muscle is rare. Radiologic findings and management of a surgically proven case of pancreatic pseudocyst extending to left perirenal space and psoas muscle is described.

췌장 손상의 CT진단

이현경,이성우,오민구 동국대학교 경주대학 1998 東國論集 Vol.17 No.1

수술 또는 임상 소견으로 췌장 손상이 진단된 34명의 환자를 대상으로 하여 손상 직후 시행한 전산화단층촬영 소견을 후향적으로 분석하였다. 전산화단층촬영 소견상 췌장 실질 손상의 유무, 췌장 주위 액체 저류의 유무 및 위치, 전신막 비후, 동반된 장기 손상등을 알아 보았다. 34명의 췌장 손상 환자중 전산화단층촬영 소견상 췌장 실질내 병변이 관찰된 예는 22명(65%)이었고 췌장 주위 액체 저류가 관찰된 경우는 2명을 제외한 32명(94%)이었다. 액체 저류의 위치는 전신방강이 20예(59%)로 가장 많았고, 소낭이 16예(47%), 췌장과 비정맥 사이 14예(41%), 상장간막 정맥 및 동맥 주위 9예(26%), 위십이지장동맥 주위 1예(3%)였다. 전신막의 비후는 19예(56%)에서 보였다. 췌장 손상 환자의 35%에서 전산화단층촬영상 췌실질 손상이 관찰되지 않았고 췌장 주위의 액체 저류는 2예를 제외한 전례에서 관찰되었다. 그러므로 췌장 주위의 액체 저류를 관찰하는 것은 췌장 손상이 의심되는 환자에서 실질내의 손상 소견이 관찰되지 않거나 의심스러울 시 진단에 도움이 되는 유용한 소견으로 생각된다. We retrospectively reviewed the abdominal CT scans of 34 patients with surgically proven pancreatic injury or clinical pancreatitis after blunt abdominal trauma. The CT scans were analyzed for the pancreatic gland injury, presence and location of the peripancreatic fluid collections, Thickening of the anterior renal fascia, and associated injury. The pancreatic injury was identified on CT in 22 patients(65%), whereas peripancreatic fluid collections on CT were noted 32 patients(94%) who had pancreatic injury. The fluid was in the anterior pararenal space in 20 patients(59%), in the lesser sac in 16 patients(47%), between the pancreas and the splenic vein in 14 patients(41%), around the SMA & SMV in 9 patients(26%), and around the gastroduodenal artery in 1 patient(3%). Thickening of anterior renal fascia was seen in 19 patients(56%). Pancreatic injury was not observed on CT in 35% of patients with such injury, whereas peripancreatic fluid collections on CT were noted in 94% who had pancreatic injury. The presence of peripancreatic fluid is a helpful CT finding for the diagnosis of pancreatic injury after blunt abdominal trauma.

신손상시 수술 결정에 있어서 CT의 역할 : 중증 신손상을 중심으로 Its Role in Decision of Operation, Especially in Severe Renal Injury

이현경,박수성 동국대학교 경주대학 1993 東國論集 Vol.12 No.-

To evaluate the role of CT to guide how to treat patients with renal injury, we retrospectively reviewed 521 abdominal CT scans of patients with blunt abdominal trauma during a 71-month period. Thirty-one patients among them were diagnosed as renal injury. We classified those 31 patients by the category of CT-based renal injury ranging from category 1 to category 3 and compared those with clinical outcome, retrospectively. All of patient in category 1(100%), 4 patients in category 2(66%) and 1 patient in category 3(50%) were treated censervatively. Totally 29 patients(91%) were successfully treated without operation. No patient who was initially treated without surgery required delay operation due to renal injury. In conclusion, even severe renal injury including category 3 by CT scan can be managed without operation.

간흡충증에서 초음파검사의 진단적 가치

이현경,김지용,성낙진,홍성태 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

목적: 간흡충증에서 초음파검사의 진단적 가치를 알아보기 위하여 본 연구를 시행하였다. 대상 및 방법: 1996년 5월 한달 동안 간흡충의 농후유행지인 형산강 유역 포항지역의 436명의 자원자를 대상르로 초음파검사, 피내반응검사, 대변검사를 시행하였다. 이후 대변검사를 기준(gold standard)으로하여 초음파검사의 민감도, 특이도, 양성예측도 및 음성예측도를 알아보았다. 결과: 간내담관의 확장 및 담관주위 에코를 양성 소견으로 하였을 경우 초음파검사의 민감도 65.5%, 특이도는 64.6%, 양성예측도는 38.2%, 음성예측도는 84.3% 이었다. 결론: 초음파검사는 피내반응검사보다 민감하지는 못하나 특이적이었다. 그리고 피내반응검사 양성자에게 초음파 검사를 시행하는 것은 진단기준의 특이도를 높여 주는 효과가 있었다. Objectives: In this study we aimed to evaluate the diagnostic value of sonography on clonorchiasis. Subjectives and Methods: During a month, May 1996 sonographic examination, skin test, and stool examination were performed to 436 volunteers of Pohang which is located along the Hyong-San-Gang river and is one of well known endemic areas. Sensitivity, specificity, positive predictive value(PPV), and negative predictive value(NPV) of sonography were determined while stool examination was assumed as a gold standard. Results: The sensitivity of sonography was 65.5%; specificity, 63.2%; PPV 38.2%; NPV, 84.3% if both intrahepatic duct dilatation and periductal echogenicity were assumed as positive findings. Conclusions: Sonography was less sensitive but more specific than skin test. And sonographic examination perfomed to skin test positive subjects could increase the specificity of diagnostic criteria.

이방성 담낭(Bicameral Gallbladder) : 1례 보고

이현경,오연희,김승현,이성우,안우섭 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

담낭의 선천성 기형 중 이방성 담낭은 매우 드문 기형으로 저자들은 우상복부 동통을 주소로 내원하여 초음파, 전산화 단층 촬영, 간담도 스캔 검사에서 이방성 담낭으로 진단되고 수술로 확진된 이방성 담낭(Bicameral GB) 1례를 경험하였기에 문헌 고찰과 함께 보고 하고자 한다. The bicameral gallbladder is one of the rarest congenital malformation of the gallbladder. A 26 years-old male was examined for the colicky pain in right upper quadrant area. On sonographic examination the lumen of gallbladder was partitioned, nearly completely, into two chamber(fundal and ductal) that are of approximately equal size. There was gallbladder wall thickening with cholelithiasis in the fundal chamber. Surgical finding showed bicameral gallbladder divided into two camber of same size and gallbladder wall thickening with cholelithiasis in the fundal chamber.