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단조용 자동차 부품 T/P Housing과 Valve의 열처리에 따른 조직 및 변형 속도에 관하여
유형종,이호진,이건영,최진일 한국산학기술학회 2003 한국산학기술학회논문지 Vol.4 No.3
자동차 부품 TIP housing과 valve에 시용되는 S20C 계열의 강에 Mn과 V 첨가에 따른 냉각속도의 영향과 조직의 거동, 단조 시 변형속도와 경도 변화를 조사하였다. 냉각속도를 증가하면 오스테나이트 결정립에 의한 변태 지연에 의해 변태개시 온도가 저하되었다. 미소한 Mn 함량의 증가는 냉각속도를 민감하게 하여 변태개시 온도를 감소 시켜 결정립 미세화를 일으킨다. 또한, 성형압이 클수록 내부보다 표면이 큰 경도값이 나타났다. The effects of Mn, V addition on the behavior of structure and the effects of cooling rate of S20e steel for use of TIP housing and valve for automotive parts have been investigated. Transformation start temperature measured from inflection point of cooling curves has been found out to decrease with increasing cooling rate and to be more sensitive to Mn contents when cooling rate is fast. It was therefore shown that the grain was refined. If there is a big compacting pressure, it is indicated that hardness becomes much greater at surface than inside.
유형종 안동대학교 농업개발원 2001 最高農業經營者課程 論文集 Vol.5 No.-
M9키낮은 과원조성상의 문제점은 매우 많이 산재해 있으며 가장 경제적인 조성방법이 마련되지 못한 실정이다. 초기 투자비는 밀식하면 할수록 더 많이 소요된다. 그러나 기반조성을 적당히 한 채 밀식만 하면 밀식재배를 하지 않느니만 못한 결과를 가져오게 될 것이다.
임명철,유형종,송용중,서상수,강석범,김선호,유종우,박상윤 대한부인종양학회 2017 Journal of Gynecologic Oncology Vol.28 No.4
Objective: To investigate the survival outcomes in patients with bulky stage IIIC and IVovarian cancer, treated by primary debulking surgery (PDS) and selective use of neoadjuvantchemotherapy (NAC) according to institutional criteria. Methods: Medical records for advanced ovarian cancer patients who were treated at NationalCancer Center (NCC) between December 2000 and March 2009 were retrospectively reviewedin the comprehensive cancer center. Bulky stage IIIC and IV ovarian cancer cases wereincluded. Current NCC indication for NAC is determined based on patients' performancestatus and/or computerized tomography (CT) findings indicating difficult cytoreduction. After NAC, all traces of regressed metastatic ovarian cancer, potentially includingchemotherapy-resistant cancer cells, were surgically removed. Results: Of the 279 patients with bulky stage IIIC and IV, 143 (51%) underwent PDS and 136(49%) received NAC. No gross residual and residual tumor measuring ≤1 cm was achievedin 66% and 96% of the PDS group and 79% and 96% of the NAC group, respectively. Themedian progression-free survival (PFS) and overall survival (OS) time were 20 months andnot reached, but might be estimated more than 70 months in the PDS group and 15 and 70months in the NAC group, respectively. Conclusion: Extensive cytoreductive surgery to minimize residual tumor and selective useof NAC based on the institutional criteria could result in improved survival outcomes. Untilfurther studies can be done to define the selection criteria for NAC after surgery, institutionalcriteria for NAC should consider the ability of the surgeon and institutional capacity