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Ni-Cr-Mo鋼의 熱處理에 따른 機械的 性質과 衝擊靭性에 關한 硏究
秋現植,梁權承,崔秉起 조선대학교 기초과학연구소 1987 自然科學硏究 Vol.10 No.1
The influence of heat treatment on the mechanical properties and the charpy impact toughness of Ni-Cr-Mo Steel in austenitizing temperature range between 750℃~1100℃ and tempering temperature range between 250℃~500℃ was studied. The results obtained from this study are summarized as follows; 1) The most impact energy is obtained at about 900℃ of austenitizing temperature, and at the temperature of more than 900℃, impact energy decreased. That was seen to be caused from coarse of martensite structure. 2) As the austenitizing temperature increased, strength and elongation decreased. As tempering temperature increased, strength and hardness decreased, but elongation increased. 3) When the tempering temperature was 350℃, the impact energy was lowest and as the temperature was high, the impact energy increased. 4) As the austenitizing time under constant austenitizing temperature was long, hardness and impact toughness decreased.
Kim, Gwon-Sik,Kim, Kap-Choong,Kim, Beom-Su,Kim, Tae-Hwan,Yook, Heong-Hwan,Oh, Sung-Tae,Kim, Byung-Sik 대한위암학회 2010 Journal of gastric cancer Vol.10 No.3
Purpose: The aim of this study was to determine the prognostic factors and the significance of metastatectomy for Krukenberg's tumors of gastric origin.Materials and Methods: Among the patient who underwent gastric surgery from 1992 through 2005, 90 female patients with Krukenberg's tumors of gastric origin were identified. We retrospectively reviewed the clinicopathologic characteristics, prognostic factors, and treatments for primary gastric cancer. We also investigated the prognostic risk factors for the onset of metachronous Krukenberg's tumors and the survival time of patients who underwent an operation for metachronous Krukenberg's tumors. Results: The presence of a synchronous Krukenberg's tumor (mean survival time=17.6 months, P<0.01), peritoneal seeding (14.5 months, P<0.01), and non-curative resection (15.1 months, P<0.01), were statistically significant prognostic factors for survival time in female patients with gastric cancer. The stage of primary gastric cancer (P=0.049) and lymph node metastasis (P=0.011) were statistically significant risk factors for recurrence time of a metachronous Krukenberg's tumor. In the metachronous Krukenberg's tumor group (n=53), the mean survival time of the metastatectomy group (n=46, 43.2 months, P=0.012) was longer than that in the chemotherapy or conservative treatment groups (n=7 and 24 months, respectively). Metastatectomy, presense or abscence of residual tumor and extent of residual tumor were significant prognostic factors for survival time in female patients with metachronous Krukenberg's tumor of gastric origin. Conclusions: A close observation and evaluation with ultrasound or computed tomography is necessary in female patients with advanced gastric cancer to detect a metachronous Krukenberg's tumor as soon as possible. The surgeon must operate more aggressively in patients with metachronous Krukenberg's tumors.
전권식(Jeon, Gwon-Sik),김은국(Kim, Eun-Guk),김민태(Kim, Min-Tae) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.2
Naerincheon Service station was planned not only a spot to pass through but a place to stay and to be destination as a integrated service station. We propose a nature station which have nature, experience and rest with 3 key concepts which are New : for vision of integrated service station, Panorama : for beautiful surrounding landscape, and Play : for the various programs in th site.