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Late Infection from Anterior Cervical Discectomy and Fusion after Twenty Years
진성원,김세훈,최종일,하성곤,임동준 대한척추신경외과학회 2014 Neurospine Vol.11 No.1
Anterior cervical discectomy and fusion (ACDF) has been performed for degenerative and traumatic cervical diseases to improve pain and neurologic symptoms including sensory change and motor weakness. Infection, however, is a rare complication of ACDF, and late infection is even much rarer. We present a case of late Infection from ACDF C4-5 using Biocompatible Osteoconductive Polymer (BOP) after twenty years in the absence of an esophageal perforation, Zenker’s diverticulum, or recent surgery or bacteremia. Late infection from ACDF after 20 years is extremely rare in the literature. However, possibility of such a late complication should be appreciated during the follow-up period and surgical resection will be required for proper treatment.
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Modified Open-door Laminoplasty Using Hydroxyapatite Spacers and Miniplates
진성원,김세훈,김범준,최종일,하성곤,김상대,임동준 대한척추신경외과학회 2014 Neurospine Vol.11 No.3
Objective: Cervical laminoplasty has been widely accepted as one of the major treatments for cervical myelopathy and various modifications and supplementary procedures have been devised to achieve both proper decompression and stability of the cervical spine. We present the retrospectively analyzed results of a modified unilateral open-door laminoplasty using hydroxyapatite (HA) spacers and malleable titanium miniplates. Methods: From June 2008 to May 2012, among patients diagnosed with cervical spondylotic myelopathy and ossification of posterior longitudinal ligament, the patients who received laminoplasty were reviewed. Clinical outcome was assessed using Frankel grade and Japanese Orthopaedic Association score. The radiologic parameters were obtained from plain films, 3-dimensional computed tomography and magnetic resonance images. Results: A total of 125 cervical laminae were operated in 38 patients. 11 patients received 4-level laminoplasty and 27 patients received 3-level laminoplasty. Postoperatively, the mean Frankel grade and JOA score were significantly improved from 3.97 to 4.55 and from 12.76 to 14.63, respectively (p<0.001). Radiologically, cervical curvature was worsened from 19.09 to 15.60 (p=0.025). The percentage of range of motion preservation was 73.32±22.39%. The axial dimension of the operated spinal canal was increased from 1.75 to 2.70 cm2 (p<0.001). Conclusion: In the presenting study, unilateral open-door laminoplasty using HA spacers and miniplates appears to be a safe, rapid and easy procedure to obtain an immediate and rigid stabilization of the posterior elements of the cervical spine. This modified laminoplasty method showed effective expansion of the spinal canal and favorable clinical outcomes.
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肝吸蟲 및 肺吸蟲症에 있어서 免疫動物血淸을 利用한 ELISA법과 Quchterlony법의 比較硏究
陳成元,李駿商,林漢鍾 고려대학교 의과대학 1983 고려대 의대 잡지 Vol.20 No.1
Clocorchiasis and paragonimiasis are known as medically important endemic disesses, and these trematodiases have been also recognized as one of the most important public health problems in Korea. Until recently, the most common methods of diagnosis for the survey of the above two fluke disease are made by stool and sputum examinations and intradermal test. A number of serological techniques have currently been applied to parasitic diseases. Interpretation of the results obtained, however, is rather difficult, especially when specific and well-defined antigens cannot be available. Efforts in recent years have been made for the development of new promising serological techniques. The enzyme-linked immunosorbent assay (ELISA) test and in particular its application to parasitic diseases, represents a significant addition to existing serological tools. The ELISA test seems to be practical, easy to perform, and is quite sensitive. The comparative studies were made on the ELISA test and Ouchterlony test with the immune animal sera in clonorchiasis and paragonimiasis. In immunized rabbit the sere were prepared weekly up to 7th week by weekly immunization with 0.1% NaCl extracted Clonorchis and Paragoninus antigen. In infected rat the sera were prepared weekly of biweekly up to 17th week after infection with 10 or 50 metacercariae of C.sinensis. The results obtained are as follows: 1. The O.D. (optical density) values of the ELISA in Clonorchis immunzed sera was appeared firstly over 1,000 after 3 weeks immunization, and the O.D values of the ELISA was over 1,000 at 7th week until within 1 : 8,000 dilution of sera. 2. The precipitata lines was firstly demonstrated at 3rd week of Clonorchis immunized sera 3. The O.D. values of the ELISA in Paragonimus immunized sere was appeared firstly over 1,000 after 2 weeks immunization, and the O.D. values of the ELISA was over 1,000 at 7th week until within 1 : 64,000 dilution of sera. 4. The precipitate lines was firstly demonstrated at 2nd week of paragonimus immmunized sere by Ouchterlony test. 5. In the Clonorchis infected rat's sera, regression equation between the O.D. values of the ELISA and period (week) after infection was y(O.D. values)=0.0646x(period, week)+0.2733. There was correlation among the O.D. values by the grade of infection, (p〉0.05) 6. The precipitate lines was firstly demonstrated at 3rd week of Clonorchis infected rat's sera by Ouchterlony test.
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진성원,김상현 한국수자원학회 2008 한국수자원학회논문집 Vol.41 No.12
유역에서 물의 평균체류시간은 강우에 의해 토양에 강우 등으로 인해 수분이 침투하여 유출되기까지 소요되는 평균 시간이며, 침식, 식생분포, 유출기작 등을 지배하는 수문학적 과정을 이해하는데 중요한 요소이다. 물의 평균체류 시간을 산정하는 대표적인 방법인 방사성 동위원소에 의한 추적자법은 계산과정이 복잡하고 많은 비용이 들면서도 간접적인 방법임으로, 본 연구에서는 토양수분의 거동을 관측해 산지사면에서 물의 평균체류시간을 산정하는 보다 직접적인 방법을 고안하 The mean residence time is the time scale for intermediate status between infiltration and runoff and one of the critical factors for understanding runoff response, erosion, and eco-hydrological processes. This research explored a direct method to estimat
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스프링백을 고려한 루프사이드 레일의 인장-굽힘 성형을 위한 3차원 금형설계
진성원,임재혁,박병도,추정욱,정규율,최인호 대한기계학회 2022 大韓機械學會論文集A Vol.46 No.12
Three-dimensional (3D) stretch-bending die design was performed based on the response surface model with a calibrated FE model with reference to the test results of 3D stretch-bending of the roof-side rail for SUV class vehicles. To accurately predict the springback, the calibrated FE model that reproduces the springback of the 3D stretch-bending test was prepared through one-way stretch-bending forming. The calibrated model was applied to the two-way stretch-bending process to predict the configuration of the 3D die design. To achieve the target shape of the roof-side rail considering the springback behavior, three design variables - tensile force and two die angles - were chosen to construct a response surface model with the central composite design and used for the prediction of the die design for the target shape. Finally, it was verified by the test results of the two-way stretch-bending forming. SUV급 차량의 루프사이드 레일(roof-side rail)의 금형설계를 위해 유한요소해석을 이용하여 스프링백 (springback) 형상 예측 및 3차원 인장-굽힘 금형의 형상을 최적화 기법을 통해 도출하였다. 스프링백을 예측하기 위해 단방향 인장-굽힘 해석을 수행하고 해석모델을 보정하여 3차원 인장-굽힘 시험의 스프링백 현상을 재현하는 유한요소모델을 준비하였다. 보정된 해석모델을 양방향 인장-굽힘 성형 공정에 적용하였으며 이를 기반으로 양방향 인장-굽힘 성형용 금형을 제안하였다. 이때 루프사이드 레일의 목표 형상을 손쉽게 달성하기 위해 인장력과 2개의 금형의 각도로 구성된 3개의 설계변수를 설정하고 중심합성계획법을 이용하여 반응표면을 생성하였다. 이를 기반으로 최적화를 수행하여 최적의 금형을 제안하였다. 최종적으로 양방향 인장-굽힘 성형 결과와 해석 결과 형상을 비교하여 제안된 방법의 적절성을 확인하였다.
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수준별 수업에 대한 체육교사의 관심도 및 실행형태 연구
진성원 ( Seong Won Jin ),박윤식 ( Yoon Shick Park ),육동원 ( Dong Won Yook ),신정택 ( Jung Taek Shin ) 한국스포츠정책과학원(구 한국스포츠개발원) 2008 체육과학연구 Vol.19 No.2
본 연구는 수준별 수업에 대한 체육교사의 관심도, 실행형태에 대한 연구로써 수준별 수업 실행의 현 상태를 진단하고 관심도와 실행형태의 관계를 분석하여 그 결과를 토대로 교육적인 가치를 모색해 보는데 그 목적을 두고 있다. 연구대상은 수원소재의 중학교에서 근무하는 체육교사 150명을 대상으로 설문조사를 실시하였고, 수집된 자료는 개인변인에 따른 관심도와 실행형태를 T검증과 F검증으로, 관심도와 실행형태의 관계를 일원변량분석으로 통계처리 하였다. 본 연구의 결과, 체육교사들의 관심도는 대안적 관심의 단계였고, 성별과 학습규모에 따라 차이가 있었다. 실행형태에서 수업계획은 협의회를 통해 학생의 특성을 고려하여 수립하고 있었고, 또한 수업지도안을 작성하지만 수업상황에 맞게 변형하여 수준에 따라 2~3개의 목표와 모둠으로 지도하고 있었다. 과제연습은 반복을 통하여 진행하였고, 평가는 체육교사에 의하여 실시되며 성적산출에 활용되고 있었다. 체육교사들의 관심도에 따른 실행형태 간의 관계를 분석한 결과 수업계획과 지도목표, 모둠편성 방법의 영역에서 유의한 차이가 존재하고 있었다. The purpose of this study is to examine the physical education teachers` stage of concern, innovation configuration about the differentiated instruction and the analysis of their relationship to seek its value in educational aspect through their results. The respondents consisted of 150 P.E. teachers who worked at middle school in Suwon. stage of concern and innovation configuration of the respondents` items(T-test, F-test) and the relationship between the two(one-way ANOVA) was administered. According to the analysis of the stage of concern, most P.E. teachers showed refocusing concern(6th stage) about the differentiated instruction. And with regard to the differences of P.E. teachers` stage of concern according to their background variables, the analysis results showed statistically meaningful differences according to distintion of sex and class-scale. According to innovation configuration about the differentiated instruction, P.E. teachers formulated an annual and a class plan considered a characteristic of students on a conference. Though P.E. teachers made a teaching plan, they taught trans-formating lessons in class situation, determined 2-3 goals and groups by personal ability and kept in instructing the practice style. The evaluation was administerd by P.E. teachers, generally applied to make grades. With regard to the differences of P.E. teachers` innovation configuration according to their the stage of concern, the analysis results showed statistically meaningful differences according to class plan, teaching goal and the method of organizing group.
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