• Proceedings of the Korea Water Resources Association Conference
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• 2005.05b
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• pp.1312-1316
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• 2005

Due to the Typhoon MAEMI on Sep. of 12 in 2003, the turbidity value of IMHA Dam was recorded more than 213NTU until now. The natural zeolite located in the east coast of Korean peninsula was applied to reduce turbidity with ion exchange Process. The result of this technique, the value of turbidity was reduced less than 1NTU. Also the value of pH showed stable state compare to before and after.

• Journal of Haehwa Medicine
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• v.18 no.2
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• pp.119-129
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• 2009

The purpose of this study is to find out relationship between "Yakjing" and the textbook of herbology. Conclusions are as below. 1. The herbs of accumulation of poison(結毒) generally show cold nature and have a reducing effect, which resemble the method of treating accumulation and stagnation. 2. The herbs of muscular contracture(攣) show sweet taste and tonifying effect, fall on the spleen and the stomach and have acts of treating urgency, relieving pain and conciliating, which resemble the method of treating urgency(急)and pain from accumulation and stagnation. 3. The herbs of water poisons(水毒) are categorized as those of cold nature and dampness and we can find out that water poisons is related to cold nature. 4. The herbs of feverish feeling(煩) treat heat. 5. The herbs of cardiothoracic part have an effect of regulating Gi and treat the phlegm disease.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.5 no.4
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• pp.295-305
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• 1993

Thermal performance of test cell of model hot water Ondol house was simulated by equivalence heat resistence and heat capacity method. In this method wall was replaced by two equivalence and one heat capacity. This method enables to simulate the variation of temperature of each element of model house. The effect of pipe diameter, pitch of pipe and with or without consideration of inter-radiation between wall surfaces on the energy consumption rate were investgated. Results show that radiations between the ground surface of room and wall surfaces contribute to the heating of room air by reducing the convection heat loss through the wall surfaces.

• Journal of Korean Society on Water Environment
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• v.24 no.3
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• pp.285-290
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• 2008

This study was done to explain the role of limestone which might intervene in the phosphorus cycle in a lake. The effects of limestone on the dissolution of phosphate were estimated by simulations with the computer model Visual MINTEQ, which is designed for the chemical equilibrium calculations. According to the calculations limestone shows remarkable effects for the suppression of phosphate dissolution. The limestone can suppress the dissolution of phosphates by sacrificing themselves to acids, and as a consequence can increase the hardness and alkalinity of the lake. Both hardness and alkalinity play an important role in reducing soluble P and thus alleviate the eutrophication potential.

• Journal of Korean Society of Water and Wastewater
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• v.26 no.1
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• pp.29-35
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• 2012

A bio-encapsuled media was developed to apply on reducing odors produced from organic waste treatment process. The microorganism, candida tropicalis, was encapsulated in sponge media consisted of polyurethane material. Sodium alginate as a natural polymer which does not affect to hydrophilic microbes and PEGDA(poly ethylene glycol diacrylate) as a artificial polymer were used for the encapsuled media. The media was evaluated with TMEDA (N,N,N',N'-tetramethylethylenediamine, 0.02~0.1%) as a catalyst at different temperature 25 and $35^{\circ}C$. The best performance was achieved with 0.02% of TMEDA at $25^{\circ}C$. The microbes' activity in the media was examined by Live/Dead cell method.

• Proceedings of the Korea Water Resources Association Conference
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• 2008.05a
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• pp.539-543
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• 2008

이 연구에서는 보령화력발전소 방수로 수중방류구조에 대한 수리모형실험을 수행하여 수중방류구조 내 흐름 양상을 고찰하고, 수평 유공판의 거품저감 효과를 검토하였다. 수중방류구조 내 유속은 설계시 거품의 부상 및 외해 유출 방지를 위해 고려한 목표값 1 m/s 이내에 분포하였다. 또한, 2차 낙하 위치에 수평 유공판을 설치함에 따라 거품 발생량이 크게 감소함을 확인하였다. 그러나, 수평 유공판 설치에 따라서 평균유속은 거의 변화가 없었으며, 다만 외해 조위가 운전정지수위에 해당할 경우에는 수평 유공판 아래에서 연직방향 흐름의 세기가 감소하였다.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2003.10a
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• pp.559-562
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• 2003

The results and discussions of surveyed case site at constructed steel pile in potential acid sulfate soil were as follows. Topography at surveyed site was local alluvial valley and that site soils was classified as BanGog and YuGye series as detailed soil surveyed results in RDA and soil texture was Clay/Clay Loam. Soils pH was neutral, which was average 7.5 but much decreased to average 4.2 after $H_2O_2$ treatment. Organic matter and sulfate ions contents were very rich. The corrosion was severe at ground water fluctuation depth. Deposits colored black were attached to steel pile surface, which because of violent reaction in treatment HCI solution, were guessed as corrosion products (FeS) reduced by sulfate reducing bacteria(SRB). Consequently, main cause was thought microbiologically induced corrosion at this site where there is ground water fluctuation occurring oxidation and reduction reactions in turn and the soil is potential acid sulfate soil.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2014.05a
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• pp.100-101
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• 2014

The global warming because of the CO₂ emission and solution about this emerge as the international enviroment problem. Particularly, it is the absolutely it is needed for reducing the CO₂ in the cement industry and harmful material actual condition. And the construction of home and abroad and material manufacturers tries for the technology development for the carbon dioxide and harmful material reduction which the portland cement in manufacture is usually emitted along with the increase of concerns about the environment-friendly concrete and panel. Therefore, in this research, the compressive strength of the inorganic binder and flexural strength tries to be measured in order to draw the inappropriate high temperature cure time of the ternary system inorganic binder using the blast furnace slag, red mud, silica fumewhich is the industrial byproduct with the cement substitute material, and etc.

• Journal of the Korean Society of Food Science and Nutrition
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• v.30 no.3
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• pp.439-443
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• 2001

The effect of fermentation of peanut milk with lactic acid bacteria on n-hexanal content was investigated. Changes in pH, titratable acidity and viable cell populations indicated that Streptococcus salivarius subsp. thermophilus was adapted better than Lactobacillus delbrueckii subsp. bulgaricus during fermentation. Analysis of headspace volatiles revealed that n-hexanal, which is one of the compounds responsible for undesirable green/beany flavor in peanut milk, completely disappeared as a result of fermentation. S. salivarius subsp. thermophilus was more effective than L. delbrueckii subsp,. bulgaricus in reducing the n-hexanal content. No significant difference was found in water sorption between fermented and unfermented peanut milk.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2011.11a
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• pp.109-110
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• 2011

Gypsum is an important building material used to provide fire resistance to constructions by reducing their temperature rises. As the hardened gypsum is exposed to fire, evaporation of both the free water and the chemical bond water is easier than that in the cement extruding panel. The purpose of this study is to investigate the utilizability of alpha-hemihydrate gypsum to prevent spalling failure of cement extruding panel exposed to fire. This paper reports the fire-resistance property of a controled general cement extruding panel(C100), and gypsum-cement extruding panels(C50A50, A100) according to replacement ratio of alpha-hemihydrate gypsum. As a results, it is found that A100 and C50A50 are more effective to prevent the explosive spalling failure under standard fire condition than C100.