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파괴면적지수법을 이용한 복합재료 기계적 체결부의 강도평가에 관한 연구
전영준 ( Jeon Yeong Jun ),최진호 ( Choe Jin Ho ),권진회 ( Kwon Jin Hoe ) 한국복합재료학회 2003 Composites research Vol.16 No.5
복합재료의 사용이 일반화되면서 복합재료 구조물의 효율성은 복합재료 구조자체 보다는 복합재료 체결부에 의해서 결정되기 때문에 복합재료 체결부의 설계는 매우 중요한 연구분야가 되고 있다. 본 논문에서는 체결부의 형상변화 및 적층순서의 변화에 따른 파손하중을 파괴면적지수법에 의한 수치적인 예측과 실험치를 비교하여 파괴면적지수법의 유용성을 검토하였다. 11 cases에 대해서 파괴면적지수법에 의한 예측하중은 측정된 파손하중과 최대 9.96%내의 오차를 가짐을 볼 수 있었다. As the use of composites has become popular in recent years, the design of the composite joints has become a very important research area because the structural efficiency of the composite structure is determined by its joints. not by its hasic structures. In this paper, presented comparisons of numerical results by the FAI (Failure area index) method[9] and measured data for a various geometric shapes and stacking sequence justify the validity of the FA1 method. The FAI method is shown to produce very favorable comparisons with measured failure loads of mechanically fastened composite joints with the difference well within 9.96% for all 1 I cases investigated.
진행병기의 폐암환자에서 혈청 Angiotensin-converting enzyme(ACE) 활성도의 변화에 관한 연구
송홍석 ( Song Hong Seog ),전석구 ( Jeon Seog Gu ),윤병현 ( Yun Byeong Hyeon ),윤덕구 ( Yun Deog Gu ),전영준 ( Jeon Yeong Jun ),김재룡 ( Kim Jae Lyong ) 대한내과학회 1990 대한내과학회지 Vol.38 No.6
N/A From March 1987 to January 1989, we evaluated the serum angiotensin-converting enzyme(ACE) in previously untreated, histologically confirmed advanced stage Ⅲ and Ⅳ) lung cancer to test the value of serum ACE activtiy in assisting the diagnosis or prognosis of the cancer. The results were as follows: 1) Serum ACE activity is not different in the male or female in both normal control and lung cancer groups. 2) Mean serum ACE activity significantly decreased in the lung cancer group compared to the normal control(15.6 vs. 20.4n㏖/min/㎖)(p<0.005). 3) Seurm ACE activity is not related to the type of histology, stage, performance status and response to treatment, but a direct correlation with serum albumin is found(p<0.01). 4) In patients with responses after chemotherapy and/ or radiotherapy, follow-up ACE activity is not different from pretreatment values. 5) There is no direct relationship between initial ACE activity and survival.