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삽입금속을 사용한 구상흑연주철과 2024 알루미늄합금의 마찰압접에 관한 연구
김창규(CHANG-GYU KIM),김치옥(CHI-OK KIM),김광일(KWANG-ILL KIM) 한국해양공학회 2003 韓國海洋工學會誌 Vol.17 No.5
Friction welding of GCD45 spheroidal graphite cast iron and 2024 aluminum alloy has been studied, especially in terms of the joint faces and strength of friction welding. For appropriate results of the friction welding of GCD45 graphite cast iron and 2024 aluminum alloy, an insert of A1050 pure aluminum metal was used. The joint strength of the A1050 pure aluminum insert approached the maximum strength of 165.7Mpa, compared to 128MPa for the joint between GCD45 graphite cast iron and A1050 pure aluminum without the insert metal. Maximum strength, 165.7Mpa, was possible for the following optimum conditions: 20MPa for the friction pressure, P1, 60MPa for the upsetting pressure, P2, 1 second for the friction time, t1, 3000rpm for the rotation, N, and 0.3 seconds for the brake time, tB.
쪽파 중 Chlorantraniliprole, Teflubenzuron 및 Trifloxystrobin의 잔류 특성
노현호 ( Hyun Ho Noh ),이재윤 ( Jae Yoon Lee ),박소현 ( Kwang Hun Lee ),이광헌 ( Hyo Kyoung Park ),진충우 ( Chung Woo Jin ),김광일 ( Kwang Ill Kim ),심석원 ( Seok Won Shim ),윤상순 ( Sang Soon Yun ),경기성 ( Kee Sung Kyung ) 한국환경농학회 2012 한국환경농학회 학술대회집 Vol.2012 No.-
김광일,최은수,조은경,김학산,서정일,손진희,손행종,전원호,윤윤보 대한소화기학회 1995 대한소화기학회지 Vol.27 No.1
Background/Aims: Stomach cancer is the most common malignancy and one of the leading cause of death in Korea. However, the prognosis of early gastric carcinoma(EGC) has been reported execellent and this is why we emphasize the early diagnosis and treatment of gastric cancer. Methods: We analyzed 109 patients of early gastric carcinoma which had been confirmed by surgery and pathological examination from January 1986 to December 1992 in the National Medical Center. Resluts: The incidence of early gastric carcinoma was 18.5% of gastric resection for stomach cancer. Male to female ratio was 2.0:1 with male predominance. The commonly involved age of patients was 50 to 59 years and mean age was 55.2. The epigastric pain was predominant symptom and followed by epigastric discomfort and indigestion. The macroscopic classification revealed that the most common types were Ilc(31.9%) and its combined types(41.4%). In sixty cases(51.7%), the lesions extended to the submucosa, while fifty five cases(48.3%) were confined to the mucosa. The incidence of metastases to regional lymph nodes in mucosal carcinoma was in 8.9% and that of submucosal lesions was 28.3%(p$lt;0.05). The most commonly involved sites were antrum(60.3%) and lesser curvature(35.3%) of the stomach. Forty six cases(39.7%) were between 2.1 cm and 4.0cm in diameter and 15 cases less than 1cm. The most common pathologic type was tubular adenocarcinoma(82.8%), followed by signet ring ce11 carcinoma and mucinous adenocarcinoma. Overall 5 year survival rate for the entire group was 9l.6%. Conclusion: The clinical and pathologic features of early gastric carinoma in the National medical Center werc not much different from those of previous reports, except that the incidence was 18.5% in our series and higher than those of previous reports.