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송영채(Y. C. Song),이영주(Y. J. Lee),이문용(M. Y. Lee),김태일(T. I. Kim) 한국레이저가공학회 2007 한국레이저가공학회 학술대회 논문집 Vol.2007 No.-
In the remote welding system using CO₂ laser, laser beam can be rapidly transferred to a workpiece by moving mirrors of scanner system. So, it makes reducing the cycle time of welding process. We can also use and apply various kinds of weld beads by linear controlled mirrors. But most of the domestic car makers have usually applied use stitch-shaped weld bead. In that case, we don"t have the merit of remote welding system efficiently. Therefore, in this paper, we investigated the characteristic of strength weld according to patterns of weld bead on CO₂ laser welding. And we also studied the relationship between shape of weld bead and value of tensile load.
7175 합금 단조재의 미세조직과 기계적 성질에 미치는 중간가공열처리 영향
이용연,송영범,손영일,이경훈,은일상 ( Y . Y . Lee,Y . B . Song,S . T . Im,Y . I . Son,K . H . Lee,I . S . Eun ) 한국열처리공학회 1997 熱處理工學會誌 Vol.10 No.3
The microstructure, tensile and impact properties of forgings of 7175 aluminium alloy have been studied as a function of intermediate thermo-mechanical treatment(ITMT) process. The ITMT process is consisted of warm working and recrystallization. In the case that the billet was warm-worked above 60% below 250℃ and recrystallized at 475℃, the grain size revealed about 17㎛ which corresponds to one third of that of conventional process. The refinement of grain size leaded to the improved ductility and impact energy without sacrifice of tensile strength. It was found that the ITMT processed specimen behaved isotropically due to the near equiaxed grains. It was observed that the ITMT processed specimen showed the mixed fracture mode of transgranular and intergranular, instead of intergranular mode. This change of fracture mode contributed to the improved ductility and impact property.
이유복(Y B Lee),김춘규(C K Kim),허경발(K B Hur),송영식(Y S Song),김익수(I S Kim),(Roberta G Rice) 대한소화기학회 1982 대한소화기학회지 Vol.14 No.1
A 46 year old man was admitted on Nov. 16th 1962 with a complaint of mass in right upper quadrant of abaomen, and this became painful with cough and deep breathing. Clinical examinations and laboratory findings did not help to make any specific diagnosis and an exploratory laparotomy was done on Nov 23rd 1962. The mass which located in the medial segment of left lobe appearad to be an atypical abscess and this was drained and biopsy was done. A few days later, the biopsied tissue showed primary hepatocellular carcinoma. Since the tumor was relatively well localized in the medial segment of left lobe and the liver appeared to be not cirrhotic, it was decided to resect the tumor. On Nov. 29th 1962, the left total lobectomy was done and size of mass was 18. 5 x 10 x 16. 5 cm. And weighted 550 gm. Postoperative recovery was uneventfull and he was discharged at P.O.D. #30.On Mar. 2nd 1964, recurrency was noted and 5-FU 750mg was given for first 4 days and 500 mg. every other day 2 doses and patient was discharged home in critical conditions. Contary to the worsening of chest P-A X-ray findings (Fig. 3 and 4), however, the patient had been doing well, and from August of 1964, his chest P-AX-ray findings started to be improving(Fig. 5) and there after he bacame well and is living for 19 years. After this case experience, we have indicated 5-FU to several mere patients but similar results or effects coul not be reproduced. We are not cetain about what mechanisms had acted on this patient to have him live long but it may be an interesting case to record.
김태일(T. I. Kim),송영채(Y. C. Song),이문용(M. Y. Lee),남기우(K. W. Nam) 한국레이저가공학회 2008 한국레이저가공학회지 Vol.11 No.1
In the remote welding system using CO₂ laser, laser beam can be rapidly transferred to a workpiece by moving mirrors of scanner system. So, it makes reducing the cycle time of welding process. We can also use and apply various patterns of weld beads by linear controlled mirrors. But most of the domestic car makers have usually applied use stitch-shaped weld bead. In that case, we don"t have the merit of remote welding system efficiently. Therefore, in this paper, we investigated the characteristic of weld strength according to patterns of weld bead on CO₂ laser welding. And we also studied the relationship between shape of weld bead and value of tensile load.
김완석,조상섭,송영화,정교일,정명애,김영학,Kim, W.S.,Cho, S.S.,Song, Y.W.,Chung, K.I.,Chung, M.A.,Kim, Y.H. 한국전자통신연구원 2011 전자통신동향분석 Vol.26 No.6
본 고에서는 상이한 두 가지 추정방법을 적용하여 IT 융합산업 규모를 추정하고, 추정한 결과를 통하여 추정에 적용한 두 가지 방법에 대한 상호 신뢰 혹은 보완 사항을 파악하고자 한다. 그래서, 산업연관표와 field survey를 통하여 IT 융합산업 규모를 추정한 각각의 내용을 기술하고, 추정한 IT 융합산업의 규모를 바탕으로 향후 10년간을 전망하였다. 또한, 각 추정 방법에 있어서의 제약 등의 확인과 더불어 IT 융합산업의 활성화를 위한 정책적 제언을 기술한다.
반추동물용 섬유질 배합사료(TMR)의 사료 제도, 품질 및 안전성에 대한 인식 및 실태 조사
신종서 ( J S Shin ),송영한 ( Y H Song ),최염순 ( Y S Choi ),안준상 ( J S An ),김희걸 ( X J Jin ),이종인 ( J I Lee ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2015 강원 농업생명환경연구 Vol.27 No.3
This study was performed to investigate the feed production policies and production status and perception. The survey was conducted by E-mail about 20 companies of total 138 TMR feed companies in Korea. Korean feed industry has maintained a significant level of production and quality through continuous development and advanced. And feed production facilities are also equipped with a certain level of technology. However, most of the material is dependent on imports. Therefore, in order to develop a sustainable feed industry, we should proceeding to secure reliable sources about fodder resources. In order to maintain the food quality, the role of the import feed inspector is more important. The government``s various efforts are necessary for the imported feed test agencies to improve the reliablity and satisfaction and forge a feed management system.