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기술사례 : 수중 쇄암작업에 따른 진동 전파 특성에 관한 시공 사례
임대규 ( Dae Kyu Lim ),신영철 ( Young Cheol Shin ),김영민 ( Young Min Kim ),이충언 ( Chung Eon Lee ) 대한화약발파공학회 2015 화약발파 Vol.33 No.2
수중 암반 제거 방법은 화약을 사용한 수중발파와 크레인에 장착된 쇄암봉 낙하 충격을 이용하는 방법등이 널리 이용된다. 이와 같은 암반 제거 방법은 환경적인 요인에서 지반 진동과 수중 소음을 유발하게 된다. 본 연구 대상 현장은 하역 부두의 접안능력을 향상시키기 위해 기 설치된 잔교식 돌핀 구조물에 근접한 지역의 수중 기반암을 쇄암봉 낙하에 의해 제거하도록 설계되어 있다. 시험시공을 통하여 쇄암봉 낙하 충격으로 유발되는 진동에 대한 계측, 평가를 거쳐 진동 추정식을 획득하였고, 이를 본 공사에 반영하여 구조물에 대한 안전성을 확보하였다. The common underwater rock removal methods involve underwater blasting and crane’s chisel dropping impact method. From an environmental point of view, these methods cause ground vibrations and underwater noise. At the site for this study, a method of dropping heavyweight chisel is selected to remove the underwater bedrock near the ferry rack in the course of improving the cargo handling ability of the loading dock. A prediction formula for the vibration was obtained based on the measurement and evaluation of the vibrations caused by the chisel dropping impacts during the test droppings. The prediction formula was successfully applied to the main construction for securing the stability of the structure.
이상주,윤상호,김성목,정대관,김충언,문환철,이혜경,유운용,한지희,이관섭 대한내과학회 1992 대한내과학회지 Vol.43 No.6
The tumor of spleen is rare There are numerous reviews of pubished cases but, have been reported in a few cases. The hemangioendothelioma is used to denote a true neoplasm of vasculasr origin composed predominantly of masses of endothelial cells growing in and about vascular lumina. The hemangioendothelioma represents in intergrade between the well-differentiated hemangioma and the frankly anaplastic, totally cellular hemangiosarcoma. It follows the pattern of the hemangioma and is most frequently encounted in the skin but many affect viscera, particularly the spleen and liver. Recently we are experienced clinic case of splenic hemangioendothelioma in a 31-year old male with left side subcostal pain of 6 months duration. We report it with a review of the literature.
재발 및 원격전이가 발견된 악성 크롬친화성세포종 1 예
윤상호,심상인,김성목,유석준,김대하,탁상민,강지욱,김충언,문환철,이혜경 대한내과학회 1991 대한내과학회지 Vol.41 No.4
Malignant pheochrmoocytoma is a rare neoplasm of the chromaffin tissue from the adrenal medulla or from extra-adrenal paraganglionic sites. Approximately 109p of patients with pheochromocytoma have a malignant disease. Local invasion and dissemination to distant organs casue significant morbidity and early mortality with a 5-year survival of 44% for all patients with malignant diseases. Malignant pheochromocytoma secretes excess catecholamines that cause sporadic or sustained hypertension. Thus, the main treatment for this tumor is anti-hypertensive therapy. There are few data reporting malignant pheo-chromocytoma in this country. We report a case of malignant pheochromocytoma with recurrence and distant metastasis.