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송명준,박영호,유석준,심동현,Song, Myung-Jun,Park, Yung-Ho,Yoo, Seok-Jun,Sim, Dong-Hyun (사)한국토질및기초기술사회 2006 기술발표회 Vol.2006 No.-
The project comprised the construction of the new oil pier and associated topside facilities and demolition of exiting south pier. The site is located approximately 33km south of Kuwait city at MAA refinery. The approach trestle and berth structures of the new oil pier were designed to be supported by steel tubular piles Total 2,480 numbers of piles(795 piles at Approach Trestle, 1187 piles at Berth 1 -4 and 498 piles at Berth 5-6) had to be driven through the calcareous silty sand In this study, the design procedures for offshore steel pipe piles, evaluation for the compression and tension capacities by static and dynamic load test and effective driving criteria by the final set values are discussed
송명준(M. J. Song),권용철(Y. C. Kwon),이성환(S. H. Lee),강종훈(J. H. Kang) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
Internal defect of large scale forging is influenced by the steel quality and forging process and main researches are being made to minimize these quality problems. Previous researches verified that the effect of deformation ratio and effective strain are dominant among other factors. In this research, Tower flanges and wind turbine generator shafts manufacturing processes are investigated to quantify the relationship between deformation amount and internal defect. With 2cases of rigid-viscoplastic FE-analyses and production tests, internal defect rate of large forgings is linearly reduced on the effective strain increase.
UAV용 유체역학적 추력편향 노즐의 고 정확도 다분력 시험장치 개발
송명준(Myung-Jun Song),장홍빈(Hong-Been Chang),조용호(Yong-Ho Cho),이열(Yeol Lee) 한국항공우주학회 2013 韓國航空宇宙學會誌 Vol.41 No.2
추력편향 제어기술은 무인기의 고기동성 확보에 있어 필수적이다. 본 연구에서는 동축 코안다 효과를 이용한 초음속 사각노즐 유동의 추력편향 특성을 정량적으로 측정할 수 있는 다분력 시험장치를 개발하였다. 엄밀한 보정 및 자세한 자료분석 과정을 통하여 본 연구에서 개발된 시험장치의 로드셀 상호간섭에 의한 측정오차는 약 5% 미만임이 관찰되었고, 또한 고압 연결튜브에 의한 오차는 거의 무시할 수 있음이 판명되었다. 아울러 개발된 시험장치를 이용하여 본 연구의 동축 코안다 효과를 이용한 사각노즐의 추력편향 특성에 관한 기초적인 실험결과가 얻어졌다. The thrust vector control technique is essential for high maneuverability of unmanned aerial vehicles. In the present study, a multi-component balance was developed to quantitatively evaluate the thrust-vectoring performance of a supersonic rectangular nozzle based on the Coanda coflowing effect. Precise calibration and detailed data analysis were performed during the development. It was found that the cross-talk errors between load cells in the balance were less than 5%, and that the unwanted errors due to high-pressure supply tubes were almost negligible, which contributed to the high accuracy of the present balance design. Some preliminary test results of the thrust-vectoring performance of the present nozzle design were also obtained and analyzed.
추력편향 노즐의 정량적 성능특성 관찰을 위한 시험장치 설계
송명준(Myung-Jun Song),윤상훈(Sang-Hun Yoon),조용호(Yong-Ho Cho),이열(Yeol Lee) 한국추진공학회 2011 한국추진공학회 학술대회논문집 Vol.2011 No.11
노즐 출구에서 유출되는 이차제트의 코안다 효과를 이용하는 유체역학적 추력편향제어 방법은 초음속 제트의 효율적인 추력편향을 위한 새로운 방법이다. 그동안 진행된 유동가시화 결과에서 관련 기술의 장단점이 관찰된 바 있으나 그 결과가 정성적인 한계가 있었다. 따라서 이차제트의 코안다 효과를 이용한 추력편향제어의 성능특성에 관한 정량적 관찰 연구가 진행되었으며, 이를 통한 시험장치 설계, 보정 및 자료획득 연구결과가 제시되었다. The fluidic thrust vector control using co-flowing coanda effect of secondary jet at the nozzle exit is a new concept for efficient thrust vectoring of supersonic jet exhausts. Flow visualization of the flow fields in previous studies have shown some pros and cons of the technique, however, most of the observations were somewhat limited as qualitative data. The present study was designed to evaluate the quantitative performance-characteristics of the thrust-vectoring technique utilizing coanda effects of the secondary jet. Details of design of the test device and calibration/data reduction procedure are provided.
Pros: Thromboprophylaxis in liver cirrhosis
송명준 ( Myeong Jun Song ) 대한간학회 2017 간학회 싱글토픽 심포지움 Vol.2017 No.2
Liver cirrhosis (LC) has long been considered in a clinical practice associated with a bleeding risk. LC is characterized by a defective synthesis of coagulation factors leading to prolonged conventional coagulation tests such as the prothrombin time (PT). The causal relationship between the abnormality of this test and the risk of bleeding has been for long time taken for granted, but this paradigm has been challenged because, apart from gastrointestinal bleeding, spontaneous bleeding is not frequent in LC. Furthermore, both spontaneous and provoked bleedings are unrelated to platelet and clotting changes. There are also evidences that patients with LC suffer also from thrombosis in the portal and systemic circulation. Portal vein thrombosis (PVT) occurs in approximately 20% of patients with LC, particularly in those with advanced cirrhosis, and it is considered a hallmark of poor outcomes. However, treating PVT with anticoagulants could be difficult to implement because the coexistence of a coagulopathy may be a potential barrier, and there is also the fact that the “coagulopathy” of patients with LC is difficult to be accurately assessed with standard laboratory indexes, such as prothrombin time. Despite this, there are a few studies for safety and efficacy of anticoagulants in patients with LC and PVT. Thus, it is necessary that definitive criteria for indication of prophylaxis or treatment of thrombosis in the portal and systemic circulation in patients with LC should be introduced for the optimal management.
간세포암에 대한 약물 방출성 미세구를 이용한 간동맥화학색전술
송명준 ( Myeong Jun Song ) 대한간암학회 2012 대한간암학회지 Vol.12 No.2
Transarterial chemoembolization (TACE) has been widely used as a standard treatment for HCC patients who are not suitable candidates for curative treatments and as a bridge to liver transplantation. The rationale for TACE is that the intra-arterial chemotherapy using lipiodol and chemotherapeutic agents, followed by selective vascular embolization, will result in a strong cytotoxic effect combined with ischemia (conventional TACE). Recently, drug-eluting beads (DC Bead®) for the transcatheter treatment of HCC have been developed to deliver higher doses of chemotherapeutic agent and to prolong contact time with the tumor. DC Bead® has the ability to actively sequester doxorubicin hydrochloride from solution and release it in a controlled and sustained fashion. Treatment with DC Bead® has been shown to substantially diminish the amount of chemotherapeutic agent that reaches the systemic circulation compared with conventional, lipiodol-based regimens, significantly reducing drug-related adverse events. In this article, we describe the treatment efficacy and safety of TACE with the drug-eluting bead for the treatment of hepatocellular carcinoma and discuss future therapeutic possibilities.