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활성슬러지 구성 미생물에 의한 폴리오바이러스의 감소 효과
김태동,최동혁,Kim, Tae-Dong,Choi, Dong-Hyuk 한국환경보건학회 2006 한국환경보건학회지 Vol.32 No.4
The biological wastewater treatment system is known to have an important role in reducing the quantify of enteric virus in water environments. To clarify the roles of activated sludge microbes in decreasing the virus infectivity, the behavior of the virus in bacteria, protozoa, and metazoa was examined by pure or mixed culture system using poliovirus type 1(Lsc, 2ab strain). In the bacterial culture systems, the virus infectivity in the liquid phase decreased by a reversible adsorption of the virus to the bacteria or bacterial flocs. On the other hand, in the protozoa and the metazoa culture systems using T. pyriformis and P. erythrophthalma, respectively, with a variety of bacterial strains as prey, the main virus decrease mechanism of reversible adsorption in early stage was changed to irreversible predation, which was not eluted in this study. The virus decrease was more effective in the P. erythrophthalma culture system, which had high predation and floc forming abilities. However, in the mixed culture system of Z. ramigera and P. erythrophthalma, the more rapid reversible adsorption of virus to Z. ramigera flocs preceded the irreversible predation of P. erythrophthalma.
김태동 ( Tae Dong Kim ),김태년 ( Tae Nyeun Kim ),오희주 ( Hee Ju Oh ),김준환 ( Jun Hwan Kim ),이헌주 ( Hun Ju Lee ),박원규 ( Won Kyu Park ),장재천 ( Jae Chun Jang ) 대한내과학회 2005 대한내과학회지 Vol.69 No.-
Pylephlebitis, a suppurative thrombophlebitis of the portal venous system, is a rare complication of intra-abdominal sepsis usually followed by infection either in the region draining the portal system or in the structure contiguous to the portal vein. Early diagnosis and initiation of adequate antibiotic therapy is important for improving the long-term prognosis of patients suffering from this rare disease, so we retrospectively reviewed 6 cases of pylephlebitis. All patients were males with a mean follow-up of 11 months (range 5~24 months). Clinical symptoms consisted of fever (100%), right upper abdominal pain (100%), jaundice (33.3%), and diarrhea (16.6%). Anemia and leukocytosis were found in 6 patients. Suspected etiology was acute cholangitis in 2 patients, acute appendicitis in 1 patient and idiopathic in 3 patients. All patients were successfully diagnosed with dynamic CT scan which showed the presence of portal vein thrombosis (100%), superior mesenteric vein thrombosis (66.6%), liver abscess (33.3%), and biloma (16.6%). Patients were treated with the systemic administration of a broad spectrum antibiotics and 1 patient was given anticoagulant. Initial symptoms were improved in all patients and some beneficial effects of anticoagulation are expected to achieve the recanalization of thrombosis and prevent atrophic changes in the liver, but further studies on the kind of therapy are needed. (Korean J Med 69:S798-S806, 2005)
김태동(Tae Dong Kim),김진호(Jin Ho Kim) 대한기계학회 2020 大韓機械學會論文集A Vol.44 No.6
최근 폭발 하중을 받는 방폭문에 대한 연구가 활발히 진행되어지고 있는 추세이며, 국외에서는 여러 방폭 설계 기준을 제시하였다. 테러 공격이 국방 시설보다 일반 상업 건물에 집중되어지고 있으며, 보통의 구조 기술자들이 기본적인 수준의 방폭 설계를 수행할 수 있게 되었다. 이에 본 논문은 간단한 사례를 통하여 ANSYS Transient Structural을 사용하여 ductility ratio, support rotation angle을 계산한 뒤 방폭문(blast resistant door)의 방폭 성능을 살펴보았다. 폭발 하중의 정압만을 고려하여 해석을 수행하였으며, 2차원 설계 도면에서 CATIA Part Design을 통하여 각 부재들을 모델링하였고 CATIA Assembly를 통하여 부재들의 접촉 조건을 주어 3D 모델링을 진행하였다. μ =2.8734, θ=0.4941°라는 값을 얻을 수 있었으며 선정한 보호 수준에 적합하다는 결론을 도출하였다. Recently, research on the blast resistant door of the structures subjected to the blast load has actively been progressed, and various explosion proof design standards are presented abroad. Terrorist attacks have been concentrated in commercial buildings rather than military facilities, and normal structural engineers have been able to perform basic level explosion-proof designs. In this paper, we investigated the explosion resistance of blast resistant door after calculating the ductility ratio and support rotation angle using ANSYS Transient Structural through a simple case. The analysis was performed considering only the positive pressure of the blast loading and each member was modeled using the CATIA Part Design in a two-dimensional design drawing; 3D modeling was performed by providing the components" contact conditions through the CATIA Assembly. The values μ = 2.8734, θ = 0.4941° were obtained and conclusion was drawn that these values were suitable for the selected level of protection.