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몬테카를로 시뮬레이션에 의한 강판형교의 잔존수명 추정에 관한 연구
최종윤 ( Choi Jong-youn ),한봉구 ( Han Bong-koo ) 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.14 No.1
The purpose of this study is that estimate residual lift-time of structures by using time dependant reliability analysis and important factors of probabilistic characters causing deterioration of structures. Also engineers easy to decide time to repair structures, this study shows an example of steel girder bridge. The simulation is divided two cases. One is applied maintenance history and the other is not. The residual life-time is that case of shear and flexure of girder is more than 80years. But concrete deck's residual life-time is 21 years. The concrete decks are needed proper maintenances using purposed life-time.
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강민성(Min-Sung Kang),최종윤(Jong-Youn Choi),김희동(Heuy-Dong Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
Gas atomization of liquid metal using nozzle technology has more advantages over other methods. Previous study shows that high-velocity gas is important for effective liquid metal atomization. An important first step towards understanding the gas atomization using nozzle is complete evaluation of the flow fields. This will provide a basis for understanding how well high velocity gas is brought to bear on the liquid metal. Present work is a fundamental study of liquid metal atomization for various pressure ratio, different gas and temperature. A two-dimension, axisymmetry compressible Navier-Stokes equations are considered. Twoequation k-epsilon turbulence model is selected.
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박신영 ( Shin Young Park ),최종윤 ( Jong Yoon Choi ),백미숙 ( Mi Suk Baek ),고석봉 ( Suk Bong Koh ),이태성 ( Tae Sung Lee ),최윤석 ( Youn Seok Choi ) 대한산부인과학회 2010 Obstetrics & Gynecology Science Vol.53 No.6
Disseminated peritoneal leiomyomatosis is rare condition characterized by multiple subperitoneal nodules of benign smooth muscle proliferations. It is associated with high level of estrogen such as pregnancy, oral contraceptives or estrogen producing ovarian tumor, and occasionally associated with operation history of myomectomy or hysterectomy. Clinical course of disseminated peritoneal leiomyomatosis is usually benign, but malignant changes also rarely have been reported. We experienced a case of disseminated peritoneal leiomyomatosis who has history of laparoscopic myomectomy 10 years ago. The patient was a 35-year-old woman, and her chief complaint was palpable masses in lower abdomen. She underwent laparoscopic surgery which revealed numerous solid masses on the surface of peritoneum, descending colon, rectosigmoid colon, uterus, round ligament, and broad ligament. We present it with a brief review of literature.
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