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금속과 복합재료를 이용한 스태빌라이저 링크의 기계적 특성 평가
우영만(Young Man Woo),남기우(Ki Woo Nam) 대한기계학회 2011 大韓機械學會論文集A Vol.35 No.8
스태빌라이저는 선박, 자동차 및 비행기 등에서 과도한 동요를 막고 자세를 안정시키는 장치를 말한다. 본 연구에서 스태빌라이저 링크 POM-GF25%인 복합재료와 금속을 사용하여 제조하였다. 스태빌라이저 강도 평가를 위하여 인장, 압축 및 볼스터드 빠짐으로 실시하였으며, 모두 기준을 만족하였다. 4가지 형태의 로드에서, 널링된 로드가 가장 큰 강도를 나타내었으며, 금속제를 대체할 수 있을 것으로 판단된다. 또한 사출 금형의 재해석으로 스태빌라이저 링크 본체의 형상을 개선하였다. Stabilizers are balancing equipment that can reduce the severe rolling of ships, vehicles, and aircraft. We manufactured a stabilizer link using a metal and a composite material with 25% POM-GF. We evaluated the strength of the stabilizer link via tensile, compressive, and ball-stud separation. The standard criteria were satisfied. Of four types of rod, knurled rod has the greatest strength. We improved the shape of the stabilizer-link body by a reanalysis of the injection molding.
〈학술논문〉 또는 〈응용논문〉 : 경량화를 위한 복합재료 스태빌라이저 링크의 기계적 특성
우영만(Young Man Woo),남기우(Ki Woo Nam) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
스태빌라이저는 선박 선박, 자동차 및 비행기 등에서 과도한 동요를 막고 자세를 안정시키는 장치를 말한다. 본 연구에서 스태빌라이저 링크 본체는 POM-GF25%인 복합재료를 사용하여 제조하였다. 복합재료를 사용한 본체의 강도 평가는 볼 스터드 빠짐, 인장 및, 압축시험을 실시하였다. POM-GF25%를 사용한 본체의 강도는 상승하였으며, 중량의 감소를 가져왔다. 본 연구에서 사출 금형의 재해석으로 스태빌라이저 링크 본체의 형상 변화로 강도가 상승하였다. The stabilizer is equipment to be balance a position by avoiding the thick rolling of ship, vehicle and aircraft. In this study, the stabilizer link body was manufactured by using composite material with POM-GF25%. Therefore, the strength evaluation of stability link body with composite material carried out from tensile, compressive and ball stud separation. The strengths of stability link body with composite material were increased. From this test results, we showed that the strength was increased through the shape change of stabilizer link body by reanalysis of injection molding.
간이식 후 발생한 간세포암의 폐 전이에 대한 종양절제술의 역할
김현수(Hyun Soo Kim),서경석(Kyung-Suk Suh),전영민(Young-Min Jun),김태훈(Teahoon Kim),신우영(Woo Young Shin),이남준(Nam-Joon Yi),한국남(Kook Nam Han),김영태(Young Tae Kim),김태유(Tae-You Kim),이건욱(Kuhn Uk Lee) 한국간담췌외과학회 2009 한국간담췌외과학회지 Vol.13 No.4
Purpose: Liver transplantation (LT) has been advocated as a good management option for patients with hepatocellular carcinoma (HCC). The rate of HCC recurrence after LT is about 20%. Although the median survival time of patients with HCC recurrence is 7∼9 months, the role of surgical treatment for metastatic tumors has been reported on. In this study, we evaluated the role of metastasectomy for treating patients with pulmonary metastasis from HCC after LT. Methods: We retrospectively analyzed 10 patients with pulmonary metastasis after LT and who were treated between April 2005 and October 2007. The underlying liver disease was cirrhosis caused by chronic viral hepatitis. The surveillance protocol for HCC recurrence was as follows: assessing the serum alpha-fetoprotein level every 1 month, chest and abdomen-pelvic computed tomography every 3 months and a bone scan every 1 year or when bone metastasis was suspected. The patients with less than 3 metastatic lesions were recommended to undergo metastasectomy (Group S, n=6) and the patients with more 4 lesions were recommended nonsurgical management, including chemotherapy (Group N, n=4). Results: All the metastatic lesions were detected on the protocol chest CT scans. The median recurrence time was 7.4 months (0.8∼18.2) after LT; this was 11.0 (4.8∼18.2) months for Group S and 2.0 (0.8∼3.3) months for Group N. One patient had a single lesion and the others had multiple lesions on multilobes. The median survival times of Group S were 29.3 (18.5∼41.3) months after pulmonary metastasis and 40.3 (23.3∼48.0) months after transplantation; 5 patients had no recorded evidence of their disease status. The median survival time of Group N was 4.3 (4.0∼6.3) months after metastasis and 6.2 (5.3∼7.1) months after transplantation; all the patients have since died. Conclusion: The survival outcome seemed to be good for the patients who underwent pulmonary metastasectomy for HCC, if it was detected earlier and it was resectable (≤3 lesions). However, further study is required for validating the survival benefit of pulmonary metastasectomy.
우영남,이광수 최신의학사 1978 最新醫學 Vol.21 No.3
Our experience with dismembered pelvioplasty for congenital obstruction of the ureteropelvic juncture from March 1976 through Oct. 1977 is presented. Dismembered pelvioplasty would appear to be beneficial in the management of patients with uretero-pelvic juncture obstruction, because histological studies and improved results have culminated in the selection of the dismembered pelvioplasty as the operation of choice. The interval between the operation and a last visit after discharge varied from 4 to 13 months.