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Enhancement of tacrolimus productivity in Streptomyces tsukubaensis by the use of novel precursors for biosynthesis
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Urinary calcium excretion and insulin resistance in patients with acromegaly
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ASIC TESTER DEMONSTRATION
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하천형 호소의 체류시간과 수질
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Cardiovascular Health Metrics and All-cause and Cardiovascular Disease Mortality Among Middle-aged Men in Korea: The Seoul Male Cohort Study
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The Oxford Handbook of Climate Change and Society by John S. Dryzek^ Richard B. Norgaard and David Schlosberg (eds). Oxford: Oxford University Press^ 2011. xiv+727pp.^ 95.00^ ISBN 9780199566600
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- 저자 : 기우태(W. T. Ki) (검색결과 3 건)
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박경동(K. D. Park),기우태(W. T. Ki) 한국동력기계공학회 2006 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Antifatigue failure technology take an important the part of current industries. Currently, the shot peening is used for removing the defect from the surface of steel and improving the fatigue strength on surface. In this study, the influence of shot peening and corrosive condition for corrosion property was investigated on immersed in 3.5% NaCl, 10% HNO₃ + 3% HF, 6% FeCl₃. The immersion test was performed on two kind of specimen. The immersion periods was performed 150days. Corrosion potential, weight loss were investigated from experimental results.
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현가용 SUP-9강의 부식특성에 미치는 압축잔류응력의 영향
박경동(K. D. Park),최종완(J. W. Choi),기우태(W. T. Ki),박광(K. Park) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The compressive residual stress, which is inducing by shot peening process, has the effect of increasing the intrinsic fatigue strength of surface and therefore would be beneficial in reducing the probability of fatigue damage. However, it was not known that the effect of shot peening in corrosion environment. In this study, the influence of shot peening and corrosion condition for corrosion property was investigated on immersed in supply water, 1% NaCl, 1% H₂SO₄. The immersion test was performed with two kind of specimen. The immersion periods was performed 6480hours(270days). Corrosion potential, weight loss were investigated from experimental results. From test results, the effect of shot peening on the corrosion characteristics was evaluated.
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박경동(K. D. Park),이주영(J. Y. Lee),기우태(W. T. Ki) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Galvanized steel pipe, copper pipe and stainless steel pipe, which is being used in waterworks piping materials. In case of galvanized steel pipe, the precipitation of a product is being generated due to the pollution of the tap water, a white water phenomenon, and various corrosion reaction because a zinc ion is melted by tap water. And in case of a copper pipe, many problems which is harm in sanitation appeared because of a inflow of harmfulness substance by a frequent accident of a water leakage. So, to prevent these problems, it is substituted for stainless steel pipe. However, those problems is still occurring because of badness of welding, a problem of a water leakage in connection part, and a increment of construction expenses. Therefore, this research has examined the laying period according to each piping thickness and a corrosion shape according to each laying depth after laying in various soils(sandy loam, loamy, clay loam, clay) using galvanized steel pipe, copper pipe, and stainless steel pipe. That is, we has studied the data which is necessary for a rational method of preserving the quality of water by examining the corrosion properties of piping materials in the soil environment which waterworks piping materials is being used. In addition, in a waterworks supply, standardized data concerned to fundamental data and piping materials is not sufficient. So we has set up a purpose to develop the standardized system to develop the new method of construction.
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