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陸鍾律,權鍾完 慶一大學校 1997 論文集 Vol.14 No.2
An experimental study was performed to investigate the metallurgical characteristics of weldment for duplex stainless steel. Considering that duplex stainless steel in a composite structure of α and γ phase, it can be found that mechanical variables of weldment structure are different from base metal by weld cycle, weld deformation and residual stress through weld input heat, it has some problems because it will be easily brittle through slow cooling by post weld heat treatment. It was observed the embrittlement phenomenon in high ferrite stainless steel and after impact test to identify the fracture characteristics of the weldment, the obserbed energy was lowest in about 1073K. Therefore, it should be avoided the post weld heat treatment about those temperature. The result could be anticipated that the range of γ-phase's precipitation of Widmanstatten, which occured in heat affected zone as changing microstructure by the variation of weld heat input.
중·소 자기 제조업체의 판매·재고·생산관리 OA 소프트웨어 개발
오수열,김종화 木浦大學校 工業技術硏究所 1995 工業技術硏究誌 Vol.5 No.-
This paper dealed with the results about development of software concerned on Office Automation to maximize the increase of competition and productivity of the firms which is small-and-medium size ceramic manufacturing firms in south-western part of Korean peninsular. Co-development was carried out with developmented team of Chung-gei ceramic firms laid in chung-gei agricultural-industrial complex, and was oriented to integrate the Sale, Inventory, Production management at a same time. These results might be standard used by ceramic firms which has similar size and manufacturing process.
( Jong Lyul Lee ),( Chang Sik Yu ),( Seok Byung Lim ),( Tae Won Kim ),( Jong Hoon Kim ),( Jin Cheon Kim ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background:Precise understanding of recurrence patterns permits effi cient surveillance and effective treatment strategies. The aim of this study was to evaluate recurrence patterns after treatment of rectal cancers, specifi cally with respect to tumor location and chemoradiotherapy (CRT). Methods:A single-institution, retrospective cohort of 2,086 consecutive rectal cancer patients was enrolled between January, 2000 and December, 2007. All the patientsunderwent curative operations (R0). Tumor location was classifi ed into lower (=5cm), middle (>5cm - = 8cm), and upper (> 8cm) groups based on the distance of the inferior tumor border from the anal verge; the patients were also characterized according to whether they received preoperative/postoperative CRT. Results: The lung was the most common recurrence site in the lower group (lower vs. middle/ upper; 14.6% vs. 8.9%/ 8.0%, P = 0.001/ 0.001). Recurrence patterns were not associated with receipt of preoperative/postoperative CRT. Additionally, RT and CRT did not reduce the rate of pulmonary recurrence (no RT/preoperative CRT/postoperative CRT, 37.5/37.9/42.6%; P = 0.13). In a multivariate analysis, preoperative level of serum carcinoembryonic antigen, abdominoperineal resection, advanced T category, N category, and circumferential resection margin were identifi ed as independent risk factors for pulmonary recurrence in all groups. Otherwise, low rectal cancer was associated with unresectable pulmonary recurrence (RR = 2.19; 95% CI = 1.012-3.072; P = 0.04). Conclusions: Neither RT nor CRT affects the pattern and rate of recurrence. Tumor location specifi cally affects recurrence in rectal cancer patients, such that the lower group is a risk factor for unresectable pulmonary recurrences.
Comparison of abdominal and perineal procedures for complete rectal prolapse
Jong Lyul Lee,Sung Soo Yang,In Ja Park,Chang Sik Yu,Jin Cheon Kim 대한외과학회 2014 Annals of Surgical Treatment and Research(ASRT) Vol.86 No.5
Purpose: Selecting the best surgical approach for treating complete rectal prolapse involves comparing the operative and functional outcomes of the procedures. The aims of this study were to evaluate and compare the operative and functional outcomes of abdominal and perineal surgical procedures for patients with complete rectal prolapse. Methods: A retrospective study of patients with complete rectal prolapse who had operations at a tertiary referral hospital and a university hospital between March 1990 and May 2011 was conducted. Patients were classified according to the type of operation: abdominal procedure (AP) (n = 64) or perineal procedure (PP) (n = 40). The operative outcomes and functional results were assessed. Results: The AP group had the younger and more men than the PP group. The AP group had longer operation times than the PP group (165 minutes vs. 70 minutes; P = 0.001) and longer hospital stays (10 days vs. 7 days; P = 0.001), but a lower overall recurrence rate (6.3% vs. 15.0%; P = 0.14). The overall rate of the major complication was similar in the both groups (10.9% vs. 6.8%; P = 0.47). The patients in the AP group complained more frequently of constipation than of incontinence, conversely, in the PP group of incontinence than of constipation. Conclusion: The two approaches for treating complete rectal prolapse did not differ with regard to postoperative morbidity, but the overall recurrence tended to occur frequently among patients in the PP group. Functional results after each surgical approach need to be considered for the selection of procedure.