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휨 및 비틀림 거동 및 전단변형 효과를 고려한 차량-현수교의 동적 상호작용 해석
김문영,임명훈,권순덕,김호경,김남일,Kim Moon-Young,Lim Myoung-Hun,Kwon Soon-Duck,Kim Ho-Kyung,Kim Nam-Il 한국전산구조공학회 2005 한국전산구조공학회논문집 Vol.18 No.4
본 저자의 이전연구(김문영 등, 2004)에서는 2차원 차량 모형과 전단변형 및 회전관성 효과가 고려된 현수교요소와의 상호작용을 고려한 2차원 수직응답에 대한 동적해석을 수행하였다. 본 연구에서는 전단변형 효과와 편심차량의 효과를 알아보는데 목적을 두었다. 이를 위하여 전단변형 및 회전관성 효과가 고려된 3차원 현수교의 수직, 비틂에 대한 고유진동수와 모드형상, 그리고 교량-차량 에너지로부터 라그랑지안식을 이용하여 상호작용을 고려할 수 있는 3차원 운동방정식을 유도한다. 이후 모드중칩법을 이용하여 유도된 운동방정식을 Newmark method를 사용하여 동적해석을 수행한다. 마지막으로 본 연구에서 제시한 이론을 따라 수치해석예제를 수행하여 차량의 동적거동을 분석한다. In the previous study(Kim 등, 2004), the finite element method was used for the vortical vibration analysis of suspension bridge with the effects of the shear deformation and the rotary inertia under moving load considering the bridge-vehicle interaction. The purpose of this study is to investigate the effect of an eccentric vehicle and shear deformation. So we firstly performs the eigenvalue analysis for the free vortical and the torsional vibration of suspension bridges using FEM analysis. Next the equations of motion considering interaction between suspension bridges and vehicles/trains are derived using the mode superposition method. And then dynamic analysis was performed using the Newmark method. Finally through the numerical examples, the dynamic responses of bridges are investigated according to the proposed procedure.
간경변증과 문맥압항진증의 영상진단 : 도플러와 조영증강 초음파
김문영 대한간학회 2013 간학회 싱글토픽 심포지움 Vol.2013 No.1
Ultrasonography (US) is simple, safe and repeatable in bedside, so it is the most popular diagnostic method in the field of hepatology. However, conventional grey scale US has limitations in estimation of portal hypertension (PHT) and the severity of liver disease as well as delicate differentiation of focal liver lesions (FLL). Because of advantage of Doppler US such as noninvastveness and ability to evaluate blood flow in vasculature, several attempts using Doppler US have been made to investigate the hemodynamic changes and medical treatment response in cirrhosis and PHT. Commonly used Doppler indices for the evaluation of PHT include portal and splenic venous blood velocity and flows, and the resistive and pulsatility index at hepatic, splenic, renal, superior mesenteric artery` In spit of many positive evidences, its clinical usefulness in portal hypertension has still controversy because of lacking of reproducibility and intra- and inter-observer variation. Recently, 2nd generation microbubble contrast agents, SonoVue® and Sonazoid® are newly launched and drawing new attention beyond the simple differentiation of focal liver lesions; the estimation of effective tumor responses to anti-angiogenic drugs or local ablation therapy, the noninvasive measurement of hepatic fibrosis or PHT. Especially, because of the progression of intrahepatic shunts along with the progression of cirrhosis and PHT, hepatic vein arrival time (HVAT) of microbubble contrast agents in contrast enhanced Ultrasonography (CEUS) get shorter according to the severity of disease. Therefore, application of CEUS can be prospective for the assessment of the severity of PHT. Therefore, this report briefly reviewed the clinical usefulness of Doppler US and CEUS in assessing the severity of portal hypertension and its response to treatment.
Undiagnosed Anaplastic Ganglioglioma Resulting in the Sudden Unexpected Death of a Young Woman
김문영,김한나,박성혜,이숭덕 대한법의학회 2015 대한법의학회지 Vol.39 No.3
Intracranial neoplasms usually have definitive symptoms, causing a need for medical intervention, but a few cases result in sudden unexpected death even before diagnosis. In these cases, autopsy or post-mortem imaging may be the only way of identifying the existence of a tumor, so investigators or forensic specialists who participate in the post-mortem inspection should be aware of these possibilities. We report on a case of a 26-year-old woman without any medical history found dead in her home. A 5-cm intraventricular tumor was found during autopsy, which was histologically consistent with anaplastic ganglioglioma a very rare type of neuroglial tumor with the potential for malignant behavior. The tumor showed the characteristic features of anaplastic ganglioglioma, such as increased cellularity, a high Ki-67 proliferative index, and necrosis. There were signs of increased intracranial pressure, including flattened gyri and dilated ventricles, which led to the conclusion that this brain tumor was the cause of death.
CJ엔키노 vs 무비스트- 영화 전문 포털 CJ엔키노 vs 무비스트
김문영,Kim, Mun-Yeong 한국데이터베이스진흥원 2004 디지털콘텐츠 Vol.11 No.-
영화는 우리 시대의 대표적 문화상품으로 자리잡았다. 누구나 영화마니아임을 자처하고 주말 데이트코스로 영화관을 선택한다. 영화 전문 사 이트들은 이러한 시대 흐름을 타고 혹은 선도하며 지금의 위상을 정립해왔다. 비교적 짧은 시간에 우리 영화는 많은 변화와 성장기를 거쳐왔 다. 영화 포털 부문 1, 2위를 다투는 두 업체 CJ엔키노와 무비스트 역시 지금 새로운 도약과 변화의 시기를 맞고 있다.
Acute Myocardial Infarction due to Cardiac Allograft Vasculopathy: An Autopsy Report
김문영,김장한,박민지,이숭덕 대한법의학회 2018 대한법의학회지 Vol.42 No.3
After the Organ Transplant Act was enforced in 2000, the criteria for the diagnosis of brain death have been legalized, and cardiac transplantation has become a promising treatment choice for patients with chronic heart disease. Even though more than hundreds of cases have been accumulated in the national registry and the survival rates are increasing, the compliance of long-term survivors may decrease paradoxically, which can hinder the efforts to enhance the quality of the registry. The patients who are lost from the doctor’s surveillance and die outside hospitals should be appropriately examined to determine the cause of death so that the influence of their medical condition, if any, on their death could be revealed. Here, we report an autopsy case of a patient who died of a complication of chronic rejection after cardiac transplantation.
부검에서 발견된 폐와 간의 육아종성 병변을 동반한 폐포자충 폐렴 1예
김문영,박선미,박소형,최민성,이숭덕 대한법의학회 2016 대한법의학회지 Vol.40 No.3
We report the case of a 42-year-old woman who died in hospital from severe respiratory failure, 10 days after the onset of symptoms. Autopsy and microscopic examination identified features of diffuse alveolar damage in both lungs including hyaline membranes and intra-alveolar exudate. Gomori's methenamine silver stain of pink frothy materials in these exudates revealed thin-walled and cup-shaped microorganisms and a diagnosis of Pneumocystis jirovecii pneumonia was made. There were small granulomas in the pulmonary interstitium and hepatic lobules representing an unusual inflammatory reaction against Pneumocystis jirovecii. Extrapulmonary involvement with pneumocystis infection is a rare event occurring in 1% to 2% of all pneumocystis cases. Screening and confirmatory tests for human immunodeficiency virus (HIV) detection were positive. There was no information available regarding the patient’s medical history or the possibility of HIV infection prior to the autopsy, because the patient was a foreign worker who arrived in Korea 2 months before her death. Medical examiners often perform autopsies with limited information regarding the deceased person, even when person is a Korean national. Therefore, an awareness of protection protocols during autopsy, as well as of the atypical patterns of critical diseases, is crucial.