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홍건영(Gun-Young Hong),김대상(Dae-Sang Kim),강윤석(Yun-Suk Kang) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.11
동 연구에서는 기존 고속선 속도향상 시 주요 고려항목 중의 하나인 윤중 변동을 예측하고자 하였다. 이를 위하여 경부 고속선(광명~대전 129.998km구간)에서 KTX-Sancheon 차량을 이용하여 최고속도 302km/h와 335km/h로 주행 시 속도 증감에 따른 윤중 변동을 무선 데이터 송수신 기법을 활용하여 측정하였다. 확률론적 데이터 분석을 통하여 윤중변동에 큰 영향을 미치는 분기기 등 철도구조물에 의한 영향을 정량적으로 평가하였다. In this study, we tried to predict wheel load fluctuations (WLFs), which are one of the key factors affecting acceleration. We performed field running tests twice using the KTX-Sancheon trains on the Gyeongbu HSL. They travelled between Gwangmyeong and Daejeon at the maximum running speed of 302 and 335km/h, carefully measuring WLFs with the telemetry system (the radio data transmitter and the receiver system) at varying speeds. Additionally, effects from structures that greatly impact WLFs, such as turnouts and railroad structures were evaluated quantitatively. Among them, turnouts had the greatest impacts on the WLFs.
김웅진(Ung Jin Kim),김대상(Dae Sang Kim),홍건영(Gun Young Hong) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.5
한국철도기술연구원 의왕시험동 부지에 구축한 실대형 시험체의 열차하중 재하 시성능평가를 위해 동재하 실험을 수행 하였다. 이를 위해 벽체 및 침목의 변위 계측을 위한 변위계와 하중재하 위치로부터 거리에 따른 진동하중의 영향을 파악하기 위해 가속도계를 설치 하였다. 열차 모의하중을 구현하기 위한 일환으로, 진동 주파수 변경이 가능한 가진기를 이용한 동하중 재하에 의하여 철도 강성보강노반의 거동을 평가하였다. 가진 주파수를 3 ~ 31Hz 의 범위로 변환하여 공진시험을 수행하고, 실제 고속열차 주행시 발생되는 동하중의 주파수인 5Hz 와 27Hz 에 대해서 반복재하시험을 수행하였다. 가진일당 변위와 가속도를 산정하여 시험결과를 분석하였고, 주파수 19 ~ 25Hz 와 23 ~ 27Hz 범위내에서 시험체는 공진의 영향을 받는 것으로 평가되었다. Dynamic load test were conducted to evaluate the performance under a train load by KRRI Uiwang testbed full scale test model. LVDT and accelerometers are installed for measuring wall and sleeper displacement and understand the effect of the vibration load according to the distance from the loading position. As part of implementing the simulated load of the train, evaluation of the behavior was reinforced roadbed with rigid face wall by loading machine which can change the vibration frequency. The resonance tests were performed by converting the range from 3Hz to 31Hz frequencies, Repetitive Load Test were performed for 5Hz and 27Hz frequency of dynamic load generated in the high-speed train, respectively. Test results were analized by calculating for acceleration and displacement. Test models were evaluated as affected by the resonance in 19 ~ 25Hz, and 23~27Hz.
도시형자기부상열차 고유용품 형식승인을 위한 대상 설정에 관한 연구
김상헌(Sang-Hun Kim),박진규(Jin-Kyu Park),김준섭(Joon-Seob Kim),홍건영(Gun-Young Hong) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.5
“도시형자기부상열차 실용화 사업”에 의해 도시형자기부상열차의 개발과 시범노선이 건설되어 개통을 앞두고 있다. 도시형자기부상열차가 도시철도로서 시장에 도입되기 위해서는 열차의 성능 및 기능에 대한 객관적이고 신뢰성 있는 기준이 정립되어야 한다. 이에 따라 현행 법령체계에 부합한 도시형자기부상열차 용품 기술기준 및 시험규격이 마련되어야 할 필요성이 제기되었다. 본 연구에서는 도시형자기부상열차 고유용품의 기술기준 및 시험규격을 개발하기 위하여 자기부상열차 성능, 사양, 시험규격 관련 자료를 조사, 분석하였으며 이를 바탕으로 대상용품 선정 기준을 설정하고 기술자문 등을 실시하여 고유용품 대상 설정 결과를 도출하였다. Test line with the development of urban maglev was built by the "urban maglev program", ahead of the opening. For the introduction of the urban maglev into the market as a city railway, high standards of reliability objective must be established for the performance and features of the train. Need to be provided the test standards and technical standards of urban maglev products. As the result, conforming to the laws and regulations of the current system were raised. In this study, investigate the performance of the urban maglev, specifications and test standards related article analyzed to develop the test standards and technical standards of urban maglev specific products, the selection criteria of target products based on this set, and to provide advice, such as technical, derived its own products, the target selection result.
이금수 ( Geum Soo Lee ),박상욱 ( Sang Wook Park ),김진 ( Jin Kim ),서강석 ( Kang Seok Seo ),유경완 ( Kyoung Wan You ),정재훈 ( Jae Hun Chung ),문형철 ( Hyeong Chul Moon ),홍건영 ( Gun Young Hong ) 대한소화기학회 2017 대한소화기학회지 Vol.69 No.3
A 46-year-old woman visited our hospital presenting throat pain and globus sensation. The symptoms occurred seven days after eating raw perch and mullet. An endoscopy under sedation showed a fluke-with an approximate length of 4.8 mm and width of 1.5 mm-on the left aryepiglottic fold, with active motility on the mucosa. It was extracted from the larynx using biopsy forceps and was identified as Clinostomum complanatum. To the best of our knowledge, this is the second reported case of human infection with Clinostomum complanatum diagnosed and treated by an endoscopy in Korea. Endoscopy is a useful tool in the diagnosis and treatment of patients at risk for parasitic infections complaining of throat pain. (Korean J Gastroenterol 2017;69:177-180)
담석성 담낭염으로 오인된 담낭의 원발성 반지세포암 1예
은서준 ( Seo Joon Eun ),박상욱 ( Sang Wook Park ),조신형 ( Shin Hyoung Jo ),김현욱 ( Hyun Uk Kim ),문형철 ( Hyeong Chul Moon ),홍건영 ( Gun Young Hong ) 대한췌담도학회 2017 대한췌담도학회지 Vol.22 No.4
소화관에서 주로 발생하는 반지세포암은 대부분은 위에서 발생하며, 담낭에서 원발성으로 발생하는 경우는 극히 드물어 지금까지 국내에서는 1예만 보고되고 있다. 본 증례는 58세의 남자가 5일 전부터 발생한 상복부 통증을 주소로 내원하여 복부 전산화단층촬영과 복부 자기공명 담췌관 촬영술에서 담낭결석을 동반한 담낭염 및 담관 결석으로 진단되었다. 내시경 역행 췌담관 시술을 시행하여 담관석을 제거한 후 복강경하 담낭절제술을 시행하였다. 절제된 담낭의 조직검사에서 반지세포암으로 진단되어, 항암 치료 및 방사선 치료를 시행받았으나, 1년 후 전이성 병변 및 복수가 진행되어 현재 보존적 치료 중이다. 이에 저자들은 담낭염으로 오인된 담낭의 원발성 반지세포암 1예를 경험하여 문헌고찰과 함께 보고한다. Signet ring cell carcinoma is a rare form of gallbladder cancer and has a worse prognosis. Since few cases have been reported, information regarding the behavior and prognosis of the gallbladder carcinoma is limited. About twenty four cases of gallbladder signet ring cell carcinoma have been reported so far. We present a rare case of primary signet ring cell carcinoma of the gallbladder. A 58-year-old male presented with epigastric pain. Abdominal computed tomography showed diffuse gallbladder wall thickening with enhancement, gallstones, and choledocholithiasis. After endoscopic treatment of choledocholithiasis, laparoscopic cholecystectomy was performed. Pathologic examination of the resected gallbladder revealed adenocarcinoma of signet ring cell type in the epithelium. Immunohistochemical stain for cytokeratin 7 was positive for tumor cells. The final pathologic diagnosis was primary signet ring cell carcinoma of the gallbladder. Lymph node metastasis was detected and he received chemotherapy and radiotherapy. After one year of follow-up, bone metastasis in the lumbar spine and malignant ascites were found. The patient is being provided with palliative care. Korean J Pancreas Biliary Tract 2017;22(4):184-187
화농성 간농양 환자에서 내시경적 역행성 담도 조영술의 유용성에 관한 연구
박종서,박홍배,유성식,강명원,여향순,강성진,우용안,임연근,홍건영 대한소화기내시경학회 2000 Clinical Endoscopy Vol.20 No.2
Background/Aims : This study was undertaken to evaluate the usefulness of ERCP in patients with pyogenic liver abscess. Methods: An endoscopic retrograde cholangiographic study of 70 consecutive cases of pyogenic liver abscess was conducted during the period from January, 1993 to December, 1997. Among 70 cases of pyogenic liver abscess, the male to female ratio was 1.69:1, and the peak incidence was in the sixth decade. Results : The common associated diseases were liver cirrhosis (11.4%), diabetes mellitus (8.5%), and malignancy (5.7%). The most common origins of the abscess in decreasing order of frequency were, transbiliary infection (51%), hematogenous spread, and trauma-associated causes. The ascending infection through the biliary tract as the etiology of liver abscess, has been common since the 1970's. The positive rate of abdominal US, CT, and ERCP in the diagnosis of the etiology of the liver abscess was 68, 82, 84% respectively. The treatments of the pyogenic liver abscess were, surgical drainage i 15 cases (21%) and percutaneous drainage in 51 cases (73%). Among 70 patients treated for pyogenic liver abscess, 12 patients had CBD stones and 11 patients were cured by EST. Conclusions : The most common origin of liver abscess is ascending infection through the biliary tract and ERCP may be a effective tool in the assessment and management of the etiology of pyogenic liver abscess.