http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
企業管理의 統計的方法 小考 : a few illustrative cases in mechanical engineering field 機械工業을 中心한 事例 二三
成煥泰 慶北工業專門大學 1965 論文集 Vol.2 No.-
Statistical Methods, such as quality control, industrial engineering, operations research, and so forth, has been employed for well-planned management of modern industries. And it is applied to mechanical engineering works in the form of the statistical management of products and the direct control of work itseif or working condition. This paper considers, as illustrative such cases the control of exchangeability in machine shops, the control of melting temperature in foundries, and the setting up of work standards for machine tools, applying O.R. method thereto.
成煥泰 慶熙大學校 1974 論文集 Vol.8 No.-
Small quantity production of various items is still required in many factories on the contrary to the desirable pattern of mass production. To the cases, methods of group technology are lately applied which aim efficient manufacture by grouping the parts of similar shapes or processes. In this study theoretical analysis for optimumschedule determinaton is attempted in regard to group processing through investigating, as valuation basis of group scheduling in group technoloy, such factors as minimization of total time required, mean processing time and total delivery delay which are used as problems in scheduling of simple job.
Centrifugal pump Impeller가 일으키는 水頭에 關하여
成煥泰 慶北工業專門大學 1964 論文集 Vol.1 No.-
We regard the flow state of water through centrifugal pump impeller as a kind of two-dimensional potential flow and obtain the equation of the complex potential Φ+iΨ representing the water flow by the method of conformal representation. We can calculate the value of the coefficient k₂in the outlet of Impeller by it. In this paper, we attempted to compare the value of k₂obtained experimentally with theoretically calculated value on the potential flow about the Impeller made by the ordinary and special form, and again compared the experimental value with theoretical one on the total head by the rotation of Impeller and the water pressure along the vane surface of Impeller.
成煥泰,吳澤烈,吳煥燮 慶熙大學校 1980 論文集 Vol.10 No.-
In this study, the optimum mathematical models were made in order to derive Optimum Machining speed which is due to be established in the production of each manufactures as an important parameter based upon the cutting speed, in case of making manufactures of multi-kinds into unit-production processing. The economical optimum cutting speed has been set up by using the above phenomenon as a proper system, and the results from the comparative analysis between the above model & the actual cutting work data, are summarized as follows. (1) The mathematical models for the optimum machining speed are derived into the expressions (23), (24), (25), (26), (27), (28), (29). (2) The basic expressions of the optimum machining speed are derived into (32), (34), (36), (37), (39), (40), (41), (44), for the purpose of each estimation of the maximum efficiency standard, the minimum cost standard and the maximum profits rate standard. (3) The example of setting up the optimum cutting speed of multi-kinds manufacturing production was formulated, and the experimental theoretical values were known to be in the same range as a result of the comparative study between the cutting speed obtained by the cutting test & the optimum cutting speed calculated by the theoretical expressions.
자외선 B 조사에 의한 사람 각질형성세포주 HaCaT 세포의 Interleukin - 1α 생산에 미치는 1 , 25 - Dihydroxyvitamin D3 의 영향
성환태,최지호,성경제,임연순,지두현,장경애,여운철 대한피부과학회 2001 大韓皮膚科學會誌 Vol.39 No.2
Background: Keratinocyte-derived interleukin-1 (IL-1) αis one of the key cytokines in initiation of cutaneous inflammation. Release of IL-1 αfrom human keratinocytes may be induced by proinflammatory stimuli including ultraviolet B (UVB) irradiation, and subsequently, keratinocyte-derived IL-1 αmay exert numerous paracrine and autocrine effects. 1,25-dihydroxyvitamin D_3(1,25(OH)_2D_3) is involved in the regulation of keratinocyte proliferation and differentiation and is also recognized to have immunoregulatory properties such as an antiinflammatory effect. Objective: The purpose of this study was to investigate the in vitro effects of 1,25-(OH)_2D_3 on the production of IL-1 αby UVB irradiation in cultured human keratinocyte cell line HaCaT cells. Results: are summerized as follows; 1. The vialility of cultured HaCaT cells measured by MTS assay at 24 hours after UVB irradiation was significantly reduced at the doses of above 100 mJ/㎠ of UVB(p$lt;0.05). 2. The secretion of IL-1 αby HaCaT cells was significantly increased at the doses of above 30 mJ/㎠ of UVB(p$lt;0.05). UVB irradiation could not influence cm the secretion of IL-1 αby HaCaT cells. 3. At the concentrations of 10-8M and 10-6M of 1,25(OH)_2D_3, the production of IL-1 α by HaCaT cells(48 hours after 100 mJ/㎠ UVB irradiation) was significantly inhibited in tth culture supernatants and cell lysates(p$lt;0.05). Conclusion: UVB irradiation increased the production of IL-1 αby HaCaT cells and this stimulatory effect on the production of IL-1 αinduced by UVB irradiation was suppressed by 1,25-(OH)_2D_3. Calcipotriol(MC-903) had similar suppressive effect on the production of IL-1 αinduced by UVB irradiation in HaCaT cells to that of 1,25(OH)_2D_3
성환태,정승용,이일수 대한피부과학회 1999 大韓皮膚科學會誌 Vol.37 No.4
Chronic dermatological problems associated with lower limb amputation sites include local maceration, intertrigo, blistering and ulceration, contact dermatitis, tissue atrophy, verrucous hyperplasia, lichenification, callosities, epidermoid cyst formation, and malignant neoplasia. A 60 year-old male was presented with a verrucous oozing eruption of the amputation stump of the left leg. He had been involved in a railroad logging accident 30 years before, resulting in the loss of the left lower limb. He were a below-knee prosthesis (patellar-tendon hearing). We diagnosed him as verrucous hyperplasia by clinical and histological findings and then referred him to the division of rehabilitation for a refitting of his prosthesis, after which his eruption cleared two months later.