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申大植 中央醫學社 1942 中央醫學 Vol.11 No.5
Wahrend der 7 Jahre hindurch von 1958, bis 1965, behandelte Diabetiker an der unseren Klinik berichten wollen. Wir fanden vorzuglich uber die betreffen den Kraken dass die Glykosurie bei minimaler Kohlenhydrat-zufuhr, die Kohlenhydrat-toleranz im rasher Abnahme, korperliche Abmagerung, Krafteverlust and Ermudbarkeit(Gliederschmerzen), sogar zeitweise psychishe infektiosen Schaden hinzutreten sind. In der Mehrzahl von 69 Falle handelt es sich um die Glykosurie und den Enzymstoffwechsel im Speichel. Vornehmlich, die Produktion des Verdaungsferment im Speichel mit der Glykosurie bedeutende Rolle gespielte hatte, doch die wichtige Ursache solcher Zustande nicht Zuverlassig. Abgesehn davon oben erwahnenden Problem, nimmt wir je heftiger Glykosurie desto der PH Grad des Speichels neigt zur Azidose wahr.
고해상도 PIV 기법을 이용한 타원형 제트의 근접 유동장 해석
신대식,이상준,Shin, Dae-Sig,Lee, Sang-Joon 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.3
Flow characteristics of turbulent elliptic jets were experimentally investigated using a single-frame PIV system. A sharp-edged elliptic nozzle with aspect ratio(AR) of 2 was tested and the experimental results were compared with those of circular jet having the same equivalent diameter($D_e$). The Reynolds number based on the nozzle exit velocity and nozzle equivalent diameter was about $1{\times}10^4$. The spreading rate along the major and minor axis are different remarkably. The jet half width along the major axis decreases at first and then increases with going downstream. But along the minor axis the jet width increases steadily. The elliptic jet of AR=2 has one switching points at $X/D_e=2$ within the near field. Turbulence properties are also found to be significantly different along the major and minor axis planes.
용융아연 도금공정에서의 SNOUT 내부 유동장 해석 ( I )
신대식,최제호,이상준,Shin, Dae Sig,Choi, Jayho,Lee, Sang-Joon 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.10
PIV(Particle Image Velocimetry) velocity field measurements inside the snout of a1/10 scale model of the Zn plating process were carried out at the strip speed $V_s=1.5m/s$. Aluminum powder particles ($1{\mu}m$) and atomized olive oil ($3{\mu}m$) were used as seeding particles to simulate the molten Zinc flow and deoxidization gas flow, respectively. A pulsed Nd:Yag laser and a $2K{\times}2K$ high-resolution CCD camera were synchronized for the PIV velocity field measurement. From flow visualization study, it is found that the liquid flow in the Zn pot is dominantly governed by the uprising flow caused by the rotating sink roll, with its effect on the steel strip inside the snout largely diminished by installing of the snout. The deoxidization gas flow in front of the strip inside the snout can be characterized by a large-scale vortex rotating clockwise direction formed by the moving strip. In the rear side of the strip, a counter-clockwise vortex is formed and some of the flow entrained by the moving strip impinges on the free surface of molten zinc. The liquid flow in front of the strip is governed by the flow entering the snout, caused by the spinning sink roll. Just below the free surface a counter-clockwise vortex is formed near the snout wall. The moving strip affects dominantly the flow behind the strip inside the snout, and large amount of the liquid flow follows the moving strip toward the sink roll. The thickness of the flow following the strip is very thin in the front side due to the uprising flow, however thick boundary layer is formed in the rear side of the strip. Its thickness is increased as moving downstream toward the sink roll. Inside the snout, the deoxidization gas flow above the free surface is much faster than the liquid flow in the zinc pot. Due to the larger influx of the flow following the moving strip in the rear side of the strip, higher percentage of imperfection can be anticipated on the rear surface of the strip.