반원상 연골판 손상에서의 관절선 압통의 해석

이용석,정영복,최성우,황준성,김만경,이종석,서동현,Lee, Yong-Seuk,Jung, Young-Bok,Choi, Sung-Woo,Hwang, Joon-Sung,Kim, Man-Kyung,Lee, Jong-Suk,Suh, Dong-Hyun 대한정형외과스포츠의학회 2006 대한정형외과스포츠의학회지 Vol.5 No.2

목적: 슬관절 손상의 많은 빈도를 차지하고, 가장 흔하게 수술의 원인이 되는 반월상 연골판 손상을 외래에서 쉽게 일차적으로 검사하는 관절선 압통의 유용성을 알아보고자 하였다. 대상 및 방법: 2005년 5월에서 2006년 6월까지 군병원에서 동일한 시술자에게서 반월상 연골판 손상이 의심되어 수술을 시행한 76명의 환자를 대상으로 관절선 압통(joint line tenderness)에 대한 민감도, 특이도, 정확도, 양성 예측율, 음성 예측율 등을 분석하였다. 결과: 관절선 압통의 민감도, 특이도, 정확도, 양성 예측을, 음성 예측율은 순서대로 78.8%, 32.6%, 52.6%, 47.3%, 66.7%로 나타났으며 외측과 내측 및 불안정성을 동반한 환자를 대상으로 동일하게 분석하여도 상기 결과와 비슷하게 높지 않은 결과를 나타내었다. 결론: 관절선 압통 단일 검사는 외래에서 손쉽게 행해지는 간편한 검사이나, 그 단독 검사로서는 유용성이 떨어지는 것으로 보인다. 그러므로, 여러가지 이학적 검사를 병행 시행하는 것이 좀 더 높은 진단율을 나타낼 것으로 보이고, 필요시에는 자기공명영상(MRI)이나 진단적 관절경 검사도 필요할 것으로 보인다. Purpose: Meniscal injuries are very common sports problems and indications for knee surgery. We analyzed the effectiveness of joint line tenderness retrospectively. Materials and Methods: From May 2005 to June 2006, 76 knees which were diagnosed meniscal injury and performed arthroscopic surgery by same surgeon at military hospital were included. We analyzed sensitivity, specificity, accuracy, positive predictive value, and negative predictive value of joint line tenderness in meniscal diagnosis. Results: The joint line tenderness gave such results (78.8%, 32.6%, 52.6%, 47.3%, 66.7% for sensitivity, specificity, accuracy, positive predictive value, negative predictive value respectively). We got similar results in analyses with medial meniscal lesion, lateral meniscal lesion, and combined instability patients. Conclusion: The joint line tenderness is a easy and comfortable maneuver but, it's effectiveness is low when it is used lonely The composite examinations including MRI and diagnostic arthroscopy for meniscal injuries of the knee perform much better than joint line tenderness alone.

체외충격파쇄석술을 이용한 만성 췌장염 환자의 췌관결석의 분쇄: CT를 이용한 치료 효과의 분석

이용석,이문규,Lee, Yong-Suk,Lee, Moon-Gyu 대한영상의학회 2003 대한영상의학회지 Vol.48 No.3

목적: 만성 췌장염 환자에서 췌관결석에 대한 체외충격파쇄석술의 치료 효과를 CT를 이용하여 알아보고자 하였다. 대상과 방법:내시경적 중재술로 췌관결석 제거에 실패한 10명과 Whipple 수술을 받아 내시경을 시행할 수 없었던 1명을 포함한 총 11명의 만성 췌장염 환자에게 전기수압쇄석 방식의 체외충격파쇄석술이 시행되었다. 쇄석술 시행 전후의 CT 영상을 두 명의 방사선과 의사가 분석하였는데, 대상 결석의 장경과 단경을 측정한 후 면적을 비교하여 분쇄 정도를 5단계로 분류하였고 췌장 체부에서의 주췌관의 직경을 측정하여 비교하였다. 결과: 모든 환자에서 체외충격파쇄석술을 이용하여 췌관결석을 분쇄할 수 있었는데,시술 전과 비교하여 75%이상의 면적이 남아 있는 1군은 2명, 51-75%가 남아있는 2군은 1명, 26-50%가 남아있는 3군은 4명, 25%이하로 남아있는 4군은 2명, 결석이 완전히 제거된 5군은 2명이었다. 결석의 평균 면적은 175 $\textrm{mm}^2$에서 쇄석술 시행 후 69$\textrm{mm}^2$으로 감소하였으며 (p<0.05),11명 중 8명 (73%)에서 50%이상 면적이 감소하였다. 주췌관의 평균 직경은 7.36mm에서 4.81 mm로 감소하였다 (p<0.05). 모든 환자에서 심한 부작용이나 합병증은 나타나지 않았으며, 시술 후 만성 췌장염의 증상이 모든 환자들에서 호전 되었다. 추적검사에서 3명의 환자에서 결석이 재발되었다. 결론: 체외충격파쇄석술은 만성 췌장염 환자의 췌관결석을 안전하게 분쇄할 수 있으므로 내시경으로 제거가 실패한 경우에 사용을 고려해야 하며, CT는 체외충격파쇄석술의 치료 효과를 비침습적이며 정확하게 평가하는데 유용하게 사용될 수 있을 것이다. Purpose: To demonstrate by CT scanning the effect of extracorporeal shock wave lithotripsy (ESWL) on pancreatic duct stones in patients with chronic pancreatitis. Materials and Methods: Pancreatic duct stones in 11 patients with chronic pancreatitis were subject to ESWL using an electrohydraulic lithotripter. Endoscopic stone removal using a basket had failed in ten patients, and in one, endoscopy was impossible due to a previous Whipple's operation. CT scans obtained before and after ESWL were evaluated by two radiologists: the longest and shortest diameters of the target stone were measured, and according to the degree of fragmentation, determined by comparing the area of the stone before and after ESWL, a grade (1-5) was assigned. In each case, the pre- and post- treatment diameter of the main pancreatic duct, measured at the pancreatic body, was also compared. Results: Disintegration of the target stone was achieved in all patients: grade 1 (over 75% of the area remained, compared with that of the initial stone) was assigned in two patients; grade 2 (51-75% of the original area) in one; grade 3 (26-50%) in four; grade 4 (under 25%) in two; and grade 5 (complete clearance of the target stone) in two. The mean area decreased from 175 ㎟ to 69 ㎟ after ESWL (p<0.05); a decrease of more than 50% was observed in eight patients (73%). The mean diameter of the main pancreatic duct decreased from 7.36 to 4.81 mm (p<0.05). No severe adverse effects or complications were noted, and all patients showed clinical improvement. Follow-up studies indicated that pancreatic duct stones recurred in three patients. Conclusion: ESWL can cause the fragmentation of pancreatic duct stones without significant complications, and should be considered where endoscopic stone removal has failed. CT is a suitable non-invasive and accurate tool for evaluating the therapeutic results of ESWL.

트렌드 지수를 반영한 블로그 랭킹 알고리즘

이용석(Yong-Suk Lee),김형중(Hyoung Joong Kim) 한국디지털콘텐츠학회 2017 한국디지털콘텐츠학회논문지 Vol.18 No.3

The growth of blogs has two aspect of providing various information and marketing. This study collected the rankings of blog posts of large portal using OpenAPI and investigated the features of blogs ranked through the exploratory data analysis technique. As a result of the analysis, it was found that the influence of the blogger and the recent creation date of the post were highly influential factors in the top rank. Due to the weakness of these evaluation algorithms, there was a problem of showing the search results which is concentrated to the power bloggers post. In this study, we propose an algorithm that improves the reliability of content by adding the reliability DB information which is verified by the experts and reflects the fairness of the application of the ranking score through the trend index indicating various public interests. Improved algorithms have made it possible to provide more reliable information in the search results of the relevant field and have an effect of making it difficult to manipulate ranking by illegal applications that increase the number of visitors.

회전하는 원형 실린더 주위의 층류 유동장에 관한 수치적 연구

이용석(Yong Suk Lee),두정훈(Jeong Hoon Doo),하만영(Man Yeong Ha),윤현식(Hyun Sik Yoon) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11

The present study numerically investigates three-dimensional laminar flow past a rotating circular cylinder placed in a uniform stream. For the purpose of a careful analysis of the modification of flow by the effect of the rotation on the flow, numerical simulations are performed at a various range of rotational speeds (0≤α≤2.5) at one Reynolds number of 300. As α increases, flow becomes stabilized and finally a steady state beyond the critical rotational speed. The 3D (three dimensional) wake mode of the stationary cylinder defined at this Reynolds number has been disorganized according to α, which were observed by the visualization of 3D vortical structures. The variation of the Strouhal number is significant when the wake pattern is changed according to the rotational speed. As α increases, the lift increases, whereas the drag decreases.

3대에 걸쳐 발생한 산호상 백내장

이용석(Yong Suk Lee),최갑희(Kap Hee Choi) 대한안과학회 1983 대한안과학회지 Vol.24 No.3

회전하는 원형 실린더 주위의 층류 유동장에 관한 수치적 연구

이용석(Yong-Suk Lee),윤현식(Hyun-Sik Yoon),두정훈(Jeong-Hoon Doo),하만영(Man-Yeong Ha) 대한기계학회 2009 大韓機械學會論文集B Vol.33 No.11

The present study numerically investigates three-dimensional laminar flow past a rotating circular cylinder placed in a uniform stream. For the purpose of a careful analysis of the modification of flow by the effect of the rotation on the flow, numerical simulations are performed at a various range of rotational coefficients (0≤α≤2.5) at one Reynolds number of 300. As α increases, flow becomes stabilized and finally a steady state beyond the critical rotational coefficient. The 3D (three dimensional) wake mode of the stationary cylinder defined at this Reynolds number has been disorganized according to α, which were observed by the visualization of 3D vortical structures. The variation of the Strouhal number is very weak when the wake pattern is changed according to the rotational coefficient. As α increases, the lift increases, whereas the drag decreases.

유전성 맥관부종

이용석(Yong Suk Lee),정진호(Jin Ho Chung),조광현(Kwang Hyun Cho),윤재일(Jai Il Youn) 대한피부과학회 1994 대한피부과학회지 Vol.32 No.1

We report a case of hereditary angioedema in a 48-year old femal patient. She expericenced facial edema and dyspnea 5 to 6 times for a year. Similar episodes developed on some members of her family, especially her sisters and father. We examined her and h

Bacillus subtilusHR-1019와 N-Acetyl-thioproline으로 제조한 미생물처리제, BIOACTIVE에 의한 상추의 생장 촉진

Yong-Suk Lee(이용석),Dong-Ju Park(박동주),Jae Hoon Kim(김재훈),Hyeong Seok Kim(김형석),Soo Yeol Chung(정수열),Yong-Lark Choi(최용락) 한국생명과학회 2013 생명과학회지 Vol.23 No.1

L-Cysteine에서 유도된 아미노산인 ATCA와 불용성 인산 가용화능을 가진 균주를 이용하여 미생물처리제 BIOACTIVE를 제조하고 안정성을 확인 하였다. 제조한 미생물처리제를 미생물 비료로 적용하고자 3회 관주 처리한 다음 상추모종의 생장촉진 효과를 조사하는 실험을 수행하였다. 그 결과로 처리한 시험 구에서 상추의 생육은 엽수, 엽장 및 엽중에서 최대 128%, 122% 및 153% 정도로 증가하였다. 처리 간에는 기준량(1,000배 희석) 처리> 반 량(500배 희석) 처리> 배 량(2,000배 희석) 처리 순으로 나타났다. 공시 BIOACTIVE의 처리가 토양 중의 유효인산 및 식물체내의 인산함량을 최대 118% 및 132% 정도 증가 시키는 경향이었다. BIOACTIVE제제를 처리했을 때 N, P, K 3요소를 관행으로 처리와 비슷한 생육 효과가 있는 것으로 보아 복합비료의 사용량을 줄여, 재배가 충분히 가능하리라 생각되며, 상추의 생육 및 비해 조사를 한 결과 본 관주 처리에서는 생육장해 및 비해는 없었다. A biofertilizer, BIOACTIVE, was manufactured by N-acetyl-thioproline (ATCA) and mineral phosphate solubilizing bacteria. The growth promoting effect of the biofertilizer on lettuce was evaluated under three different pot conditions, and its stability was assessed in the field. According to the results of the pot experiments, plant growth was improved compared with that of control: 128%, 122%, and 153% for the leaf number, leaf length, and leaf mass, respectively. Applying the manufactured biofertilizer increased the concentration of phosphate: 118% and 132% in the cultivation soil and plant cells, respectively. These show that BIOACTIVE may have potential as an effective biofertilizer in agriculture.

전력산업 인력수급 예측모형 개발 연구

이용석 ( Yong Suk Lee ),이근준 ( Geun Joon Lee ),곽상만 ( Sang Man Kwak ) 한국시스템다이내믹스학회 2006 한국시스템다이내믹스 연구 Vol.7 No.1

A series of system dynamics model was developed for forecasting demand and supply of human resource in the electricity industry. To forecast demand of human resource in the electric power industry, BLS (Bureau of Labor Statistics) methodology was used. To forecast supply of human resource in the electric power industry, forecasting on the population of our country and the number of students in the department of electrical engineering were performed. After performing computer simulation with developed system dynamics model, it is discovered that the shortage of human resource in the electric power industry will be 3,000 persons per year from 2006 to 2015, and more than a double of current budget is required to overcome this shortage of human resource.

Isolation and Characterization of a Novel Bacterium, Bacillus subtilis HR-1019, with Insoluble Phosphates Solubilizing Activity

Yong-Suk Lee(이용석),Dong-Ju Park(박동주),Jae Hoon Kim(김재훈),Hyeong Seok Kim(김형석),Yong-Lark Choi(최용락) 한국생명과학회 2013 생명과학회지 Vol.23 No.2

본 연구의 목적은 우수한 미생물 제제 개발용 인산염 가용화 균주의 개발이다. 경작지 토양에서 분리한 인산염 가용화 균주의 특성 및 16S rDNA 염기서열을 조사한 결과 Bacillus subtilis HR-1019로 동정되었다. Bacillus subtilis HR-1019는 hydroxyapatite, tri-calcium phosphate 및 aluminum phosphate 3가지의 난용성 인산염을 모두 가용화하였다. 난용성 인산염의 분해능이 최대가 되는 배양온도는 37℃이었으며, 배양초기 pH가 5.0이었다. 탄소원으로 glucose를 5% 첨가시 가용화능이 높았으며, 가용화된 유리인산의 함량이 증가함에 따라 pH가 크게 감소하였다. 분리균주 HR-1019가 식물병원균에 대하여 균의 생육을 저지하는 clear zone 확인으로 항균효과를 확인하였다. The objective of this study was to develop a mineral phosphate-solubilizing bacterium as a biofertilizer. A mineral phosphate-solubilizing bacterium HR-1019 was isolated from cultivated soils. It was identified as Bacillus subtilis by 16S rDNA analysis. The phosphate-solubilizing activities of the HR-1019 strain against three types of insoluble phosphate, hydroxyapatite, tri-calcium phosphate, and aluminum phosphate were quantitatively determined. When 5% of glucose concentration was used as a carbon source, the strain showed marked mineral phosphate-solubilizing activity. Mineral phosphate solubilization was directly related to pH drop in the culture solution of the strain. The pathogenic activity and antifungal effects of the HR-1019 strain were measured inclear zones formed in PDA media.