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論文(논문) : 형상기억합금구동기와 태엽스프링을 이용한 소형위성용 분리장치
이민형 ( Min Hyoung Lee ),손재황 ( Jae Hwang Son ),김영웅 ( Young Woong Kim ),김병규 ( Byung Kyu Kim ) 한국항공운항학회 2011 한국항공운항학회지 Vol.19 No.3
위성용 분리장치는 작동 전까지는 높은 체결력으로 위성의 부속물들을 안정된 체결 상태로 유지해야 한다. 작동 후에는 위성시스템에 손상이 없이 위성본체로부터 분리되어 태양전지판과 안테나와 같은 부속장치의 전개를 성공적으로 수행하여야 한다. 따라서 본 논문에서는 분리충격이 작고 취급이 용이하며 재장착이 가능한 형상기억합금구동기와 태엽스프링을 이용한 소형위성용 비폭발식 분리장치를 제안하였다. 성능을 검증하기 위하여 분리시간, 분리가 가능한 사전하중, 분리장치 작동 시 충격량 측정 실험을 수행하였다. The separation actuator for the small satellite should fix satellite appendages with high clamping force. After operation, it has to be separated from the satellite body without any damage on satellite system and release the appendages such as a solar panel and an antenna successfully. Therefore, we invent a non-explosive separation actuator for the small satellite which generates low shock and is resettable. In order to confirm performance of the proposed separation actuator, we carried out experiments for separation time, maximum preload for activation, and shock level.
Somatostatin 수용체 스캔에 양성인 갑상선 여포선종이 동반된 말단비대증 1예
권석호,황영웅,박용범,윤용석,원영준,임승길,이현철,허갑범 대한내과학회 1997 대한내과학회지 Vol.53 No.3S
말단비대증으로 진단된 48세 여자에서 somatostatin 수용체 스캔에 양성인 갑상선종양을 발견하여, 병리소견상 갑상선 여포선종으로 밝혀진 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Recently, the new technique that allows the in vivo visualization in man of the somatostatin receptor positive tumor after iv adminstration of the 123I-coupled somatostatin analogue Tyr-octreotide (somatostatin receptor scan) was developed. We have experienced a forty eight-year-old female patient with acromegaly and multiple thyroid nodules. Somatostatin receptor scan was performed. Unexpectedly, both pituitary tumor and multiple thyroid nodules were presented with positive by somatostatin receptor scan and we thought that multiple thyroid nodules might be malignancy, probably medullary thyroid carcinoma. Therefore, bilateral subtotal thyroidectomy was performed and pathologic finding showed thyroid follicular adenoma.
최병현,박인서,황영웅,황재하,이용찬,박수진,조용석,김원호,노재경,김충배 대한소화기내시경학회 1997 Clinical Endoscopy Vol.17 No.5
Malignant melanoma is a malignant neoplasm originated from melanocyte. Primary malignant melanoma of the esophagus is a very rare disease comprising 0.1% of all primary neoplasms of the esophagus. As with other primary mucosal malignant melanoma, primary malignant melanoma of the esophagus has poor prognosis because of the tendency to present as an advanced neoplasm with aggressive biological behavior. We present an operated case of primary malignant melanoma of the esophagus confirmed by the adjacent squamous mucosa contained junctional nests of tumor cells showing focal pagetoid spread consistent with melanoma in situ, with a clinicopoatho- logical review of the literatures.
각종 간질환에서 RT - PCR을 이용한 G형 간염바이러스 RNA의 검출률
한광협,최원,박영년,황영웅,류왕식,박은신,이관식,전재윤,문영명,박찬일 대한간학회 1997 Clinical and Molecular Hepatology(대한간학회지) Vol.3 No.2
Background / Aim : Recently, nucleotide sequences from a novel virus, termed hepatitis G virus(HGV), were identified in serum from a patient with cryptogenic hepatitis and suggested as agent of non A-E hapatitis HGV has been isolated from patients with various liver disease but clinical implications of this new agent remain largely unresolved . In Korea, the etiology of substantial fraction of hepatitis has remined undefined rate of HGV. Methods : To determine the implication of HGV, medical records of 115 patients with various liver diseases were reviewed. Of 115 patients, 63 were male and 52 were female. Their mean age was 44 years(19-74) and their mean AST and ALT were 121.3±278.7 IU/L and 172.2±253.3 IU/L, infected with hepatitis B and/or C virus and 20(17.4%) had non-viral identifiable liver diseases. Results : 1.HGV RNA was detected in 15 (13.0%) patients of 115 patients. 2. Among the 15 HGV RNA positive cases, 7 were male and 8 were female. Their mean age was 48 years(19-72) and their mean AST and ALT were 71.9±45.2 IU/L and 97.4±66.8 IU/L, respectively. 3 . HGV RNA was detected in 8 (13.85) of 58 patients without obvious causes if their liver diseases and in 7(18.9%) of 37 patients infected with HBV and/or HCV. However, HGV RNA was not detected from 20 patients with non-viral liver diseases such as alcoholic liver diseases, autoimmune hepatitis, PBC, or fatty liver. 4. HGV RNA was detected in 5 (19.2%) of 26 patients with acute hepatitis in 6 (9.4%) of 64 patients with chronic hepatitis, in 1 (14.3%) of 7 patients with liver cirrhosis, and in 3 (27.3%) of 11 patients with hepatocellular carcinoma. 5. There was no statistically significant difference in sex, age, history of transfusion, serum ALT level, etiologies and status of HGV infection is quite high among the patients who have no specific cause of acute or chronic liver diseases and HGV can be confected with HBV and/or HCV infection in Korea.