• Title/Summary/Keyword: saturation index

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Development of Corrosion Evaluation Index Calculation Program of Raw Water and Evaluation on Corrosivity of Tap Water using the Calcium Carbonate Saturation Index (상수원수의 부식평가 지수 산정 프로그램 개발 및 탄산칼슘 포화지수에 의한 수돗물의 부식성 평가)

  • Hwang, Byung-Gi;Woo, Dal-Sik
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.10 no.1
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    • pp.177-185
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    • 2009
  • In this study, we developed the program to calculate the corrosion evaluation index for examining the corrosivity of raw water. When it was applied to the Han river and Nakdong river system, sulfuric acid ion, which accelerated corrosion, was higher in Nakdong river system than Han river system while calcium and hardness, which restrained corrosion, was the same way. Summarization of the LI and CCPP calculation result by the developed corrosion evaluation model showed that water quality of Han river system had strong tendency to corrode (is strongly corrosive). Moreover, this study evaluated the corrosivity of calcium carbonate saturation index by adding the chemicals to tap water. Saturation status was maintained in the order of $Ca(OH)_2$ > NaOH > ${Na_2}{CO_3}$ > $CaCO_3$ in the case of LI and RI.

A Study on the Oxygen Saturation Level Changes in the Blood Exposed to the Static Magnetic Field (자속에 노출된 인체의 혈중 산소 포화농도의 변화에 관한 연구)

  • Jung, Yong-Chul;Lee, Dong-Hoon
    • Journal of the Korean Society of Safety
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    • v.22 no.6
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    • pp.87-90
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    • 2007
  • The effects of static magnetic field on the human biological system are becoming increasingly more important with the adaption of static magnet in the medical community. It is the goal of this paper to review the effects of static magnetic fields on oxygen saturation level in blood. The results of this paper show that the oxygen saturation level increased in the blood in index finger when the static magnetic dipole was fitted on index finger.

Prediction of the Degree of Saturation Using the Soil-Water Characteristic Curves on an Unsaturated Soil (흙-수분 특성곡선 방정식을 이용한 포화도의 예측)

  • Song, Chang-Seob
    • Journal of The Korean Society of Agricultural Engineers
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    • v.46 no.6
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    • pp.61-69
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    • 2004
  • The aim of the work described in this paper was to confirm the application of the equation of the soil-water characteristic curves on an unsaturated soil. A series of suction test for unsaturated soils was conducted on the selected 4 kinds of soil using modified pressure extractor apparatus. And it was carried out to analyse The experimental parameters which can be describe the soil-water characteristics, were determined by using the data obtained from the experiment. From the results, it was found that The matric suction varied according to the grain size distribution, amount of fine grain particles and void ratio. Also it was found that the residual degree of saturation was decreased with in crease of the void ratio, but the pore size distribution index and air entry value were increased with in crease of the void ratio. And The application of the soil-water characteristic curve equation was confirmed for the various conditions and the various state by the comparison between the measured degree of saturation and the predicted degree of saturation.

On a Reading Aloud to Relieve the Decrease in Blood Oxygen Saturation when Jogging

  • Tian, Zhixing;Bae, MyungJin
    • International Journal of Advanced Culture Technology
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    • v.8 no.4
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    • pp.95-100
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    • 2020
  • Recently, the problem of hypoxia caused by jogging is attracting attention. To solve this problem, this paper proposed a new solution. This paper proved that as a vocalization method of reading aloud, it is possible to increase air intake and activate lung function to exchange more air and obtain more oxygen. Then, blood oxygen saturation was used as an evaluation index for the body's oxygen content level to prove its effectiveness. A photoelectric pulse oximeter developed on the basis of different light absorption principles in blood was used to test blood oxygen saturation. Experimental results show that a certain degree of hypoxia is induced when a lot of oxygen is required due to jogging. Therefore, it was proved that the new vocal breathing method by reading books can increase the blood oxygen saturation of the body and improve the hypoxia of the body. Reading vocal breathing is a simple and efficient oxygen saturation recovery breathing method.

Calculation of Topographic Index with Geographic Information System

  • Kim, Sang-Hyun;Ham, Kun-Yeun
    • Korean Journal of Hydrosciences
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    • v.8
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    • pp.85-95
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    • 1997
  • The multiple flow direction algorithm to calculate the spatial variation of the saturation tendency, I. e. topographic index, is integrated into the Geographic Information System, GRASS. A procedure is suggested to consider the effect of a tile system on calculating the topographic index. A small agricultural subwatershed ($3.4\;\textrm{km}^2$) is used for this study. The impact of a tile system on the groundwater table can be effectively considered by the Laplace's equation to the DEM. The analysis shows that a tile system has a high degree of saturation to compared to the case without tile drainage, and the predicted riparian area is well fitted to the actual watershed condition. A procedure is suggested to consider a tile system's effect on calculating the topographic index.

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Prediction method of slope hazards using a decision tree model (의사결정나무모형을 이용한 급경사지재해 예측기법)

  • Song, Young-Suk;Chae, Byung-Gon;Cho, Yong-Chan
    • Proceedings of the Korean Geotechical Society Conference
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    • 2008.03a
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    • pp.1365-1371
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    • 2008
  • Based on the data obtained from field investigation and soil testing to slope hazards occurrence section and non-occurrence section in gneiss area, a prediction technique was developed by the use of a decision tree model. The slope hazards data of Seoul and Kyonggi Province were 104 sections in gneiss area. The number of data applied in developing prediction model was 61 sections except a vacant value. The statistical analyses using the decision tree model were applied to the entrophy index. As the results of analyses, a slope angle, a degree of saturation and an elevation were selected as the classification standard. The prediction model of decision tree using entrophy index is most likely accurate. The classification standard of the selected prediction model is composed of the slope angle, the degree of saturation and the elevation from the first choice stage. The classification standard values of the slope angle, the degree of saturation and elevation are $17.9^{\circ}$, 52.1% and 320m, respectively.

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The Variation of Compressional Wave Velocity with Degree of Saturation in Granites

  • Lee, Su-Gon
    • Journal of the Korean Geotechnical Society
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    • v.15 no.3
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    • pp.177-197
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    • 1999
  • The measurement of sonic velocities is commonly used as an index of engineering properties of rock, but it is not widely appreciated that this velocity can change markedly with the degree of saturation of the sample. This paper records the nature of this variation as seen in samples of Korean granite. The ISRM method of testing suggested for this index can also create difficulties, especially if vaseline is used as a coupling agent, and invades the samples, and if the sample volume changes with degree of saturation. Careful measurements of the natural variation in sonic velocity that occur in a sample whose saturation is gradually increased may be a means of assessing the relic stresses within it.

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Geomorphologic Nash Model with Variable Width Function

  • Thuy, Nguyen Thi Phuong;Kim, Joo-Cheol;Jung, Kwansue
    • Proceedings of the Korea Water Resources Association Conference
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    • 2015.05a
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    • pp.212-212
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    • 2015
  • So far, geomorphologic dispersion due to the heterogeneity characteristics of flow paths in a basin has been demonstrated as a major factor affecting to the hydrologic response function of a catchment. This effect has considered by many previous studies taking into account flow path length factors, especially in the application of width function. Based upon the analysis of topographic index, another important geomorphologic factor extracted from DEM data, this work presents a new factor named saturation to evaluate its effects to the formation of the well-known instantaneous unit hydrograph (IUH) in Nash model and drainage structure in a river basin. First, the geomorphologic parameters corresponding to different saturation conditions are computed from DEM data with the support of GIS software. Then, in the combination of hydrologic and geomorphologic data, effective rainfall in each saturation degree and the Nash parameters are calculated using excel. Finally, the verification process with direct runoff data is conducted using Fortran programming. This process is applied to five sub-watersheds in Bocheong catchment ($485.21km^2$) in Korea where the necessary data are available and believable. The results from this approach will improve researchers and students'understandings about the relationship between rainfall and runoff and its relation with drainage structure within a catchment.

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Case Report of Three Cases of Obstructive Sleep Apnea Improved with Oriental Medicine Treatment (한방치료를 통해 호전된 폐쇄성수면무호흡증 환자 3례에 대한 임상 보고)

  • Chung, Hwan-Suck;Kim, Ho-Sun
    • The Journal of Korean Medicine
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    • v.33 no.1
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    • pp.169-176
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    • 2012
  • Objectives: Obstructive sleep apnea (OSA) is prevalent disorder, particularly among the middle-aged. In this study, we report a new approach to improve OSA using oriental medicine and acupuncture. Methods: Three men diagnosed with OSA were enrolled in this study. They took oriental medicine 3 times a day and were given acupuncture twice a week for about 4 months. Results: We analyzed apnea-hypopnea index (AHI), oxygen desaturation index (ODI), average saturation (AS) and lowest saturation (LS) before and after treatment. AHI highly decreased in all patients and ODI also decreased in two of the three patients. Conclusions: These results indicate that oriental medicine and acupuncture therapy was effective in the improvement of OSA. Further study in a larger group with severity grades is recommended.

Color Transfer Method Based on Separation of Saturation (채색 분리 기반의 색 변환 기법)

  • Kwak, Jung-Min;Kim, Jae-Hyup;Moon, Young-Shik
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.45 no.3
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    • pp.149-159
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    • 2008
  • We present new methods which transfer the color style of a source image into an arbitrary given reference image. Misidentification problem of color cause wrong indexing in low saturation. Therefore, the proposed method do indexing after Image separating chromatic and achromatic color from saturation. The proposed method is composed of the following four steps : In the first step, Image separate chromatic and achromatic color from saturation using threshold. In the second step, image of separation do indexing using cylindrical metric. In the third step, the number and positional dispersion of pixel decide the order of priority for each index color. And average and standard deviation of each index color be calculated. In the final step, color be transferred in Lab color space, and post processing to removal noise and pseudo-contour. Experimental results show that the proposed method is effective on indexing and color transfer.