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최규완,장세경,이종철 대한소화기내시경학회 1983 Clinical Endoscopy Vol.3 No.1
The fifty gastrointestinal polyps, which were removed endoscopically frorn 47 patients at the Seoul National Univeraity. Hospital from January, 1978 to September, 1983, were reviewed with regard to the clinical and pathological features. The observed data are as follows; 1) Fifty polyps were reoved from 10 patients with gastric polyps and 37 patients with colonic polyps. Out of 37 patients 26 were male and 21 female, the sex ratio being 1.2: 1. 2) The gastric polyps were located in the body and antrum and 90 per cent of the colonic polyps were found in the left colon, especially in the rectosigmoid colon. 3) Out of the 10 gastric ployps snared, 8 could be retrivevd, 2 being lost. The histological examination showed that 3 were hyperplastic polyps, 2 gastritis verrucosa, 1 inflammatory polyp and the remaining 1 revealed intramucosel carcinoma with borderline epithelium. 4) Fourty polypectomies were performed in 37 patients with colonic polyps. Histological examination revealed that 24(60%) were adenomatous polyps, 9(22.5%) retention polyp, 4 (10.0%) inflammatory polyp and 3(7. 5%) Peutz-Jegher's poIyps. Among the adenomatous polys, 4 cases were complicated with focal adenocarcinoma. 5) Except the 2 cases of post-polypectomy bleeding, no other complication was encountered. The one case of hemorrhage after gastric polypectomy was treated with transfusion of 2 pints of whole blood, and the other case after colonic polypectomy required exploratory laparotomy because of inability of bleeding control by electrocoagulation.
최규완,장성호,Choi, Kyu-Wan,Chang, Sung-Ho 한국금형공학회 2016 한국금형공학회지 Vol.10 No.3
Recently, a hyaluronic acid micro needle patch for therapeutic and cosmetic purposes has been used by attaching directly to the skin with a pattern having a micro needle shape of 1/3 thickness of hair. These products are attracting attention as an innovative product that maximizes the effect by activating the active ingredient in the skin in the deep skin without blocking the horny layer because the micro needle shape exists on the patch surface so that it can penetrate effectively to the skin. Currently, DAB (droplet air blowing) or MEMS technology is used to make pattern shapes for patches. Because of this technology, manufacturing time is long and manufacturing cost is high, so we tried to develop the mold technology to machine the microneedle shape directly to the metal. In this study, we first fabricated a needle pattern with a quadrangular pyramid shape and finally produced a conical needle pattern.
외식 사업체 경영주의 교육 수혜 효과에 관한 연구: 국내 배달 중개플랫폼 W사를 중심으로
최규완,김진권 한국기업경영학회 2022 기업경영연구 Vol.29 No.6
This study analyzed the effect of the education of restaurant business owners on the sales by using the Difference In Difference method, one of the quasi-experimental design methods. For the analysis, a total of 2,048 case of restaurant owner's data from domestic delivery platform company was used. The group who took the education was considered as a experimental group and the group who did not was considered as a control group. As a result of the analysis, the education effect of restaurant business owners had a significant positive (+) effect on sales and number of sales when they received multiple rounds of training rather than one-time training. From these results, We concluded that repetitive education is more important than one-time education for restaurant business owners. In addition, as the size of sales increased, the size of the effect on sales was increased, and when the cumulative number of training increased non-linearly, the effect of education had a negative (-) effect on sales. These results suggest that since the effect of education differs depending on the size of sales, customized education for each size is important. And through the results of this analysis, we can assume that it will be more important to construct educational contents that restaurant business owners can apply to their work and achieve practical effects rather than unconditional repetition of education.