• Journal of the Korean Home Economics Association
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• v.34 no.2
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• pp.31-42
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• 1996

The purpose of this study was to examine the mother's perception on the concrete pattern of such behavior problems as noncompliance, jealousy, dependency, hyperactivity and stealing, by analyzing the difference between two cases of her own child and another mother's child relating to her attribution to the behavior problem of the child and the relationship between her attribution and behavioral reaction. This study was carried out by using 515 questionnaires answered by 1000 mothers of children of 7 kindergartens in Ulsan and Taegu, using Melissa Sweitzer's method (1986). The data was subjected to t-test, Pearson's correlation coefficient. T-test was applied to test the difference between two cases of her own child and another mother's child relating to her attribution to the behavior problem of the child and Person's correlation coefficient was estimated to test the relationship between her attribution and behavioral reaction. The result of this study is sumarized as follows : 1. It was shown that the mother's attribution to the behavior problem of the child is less serious when her child showed the behavior problem than when another child dose the problem while her attribution has an affective reaction to the behavior problem of the child. 2. The relationship between the mother's attribution and behavior reaction to the behavior problem of the child appeared variously in accordance with the attribution factor and behavior problem. Then the mother showed more attribution to stability while frequently ignoring the child.

• Bulletin of the Korean Chemical Society
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• v.23 no.2
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• pp.325-329
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• 2002

In this study, the dependency of the behavior of propagating front on the reaction condition in frontal polymerization reaction has been studied. We have used some multifunctional acrylates as a monomer and ammonium persulfate as an initiator for the polymerization reactions. In frontal polymerization, a method of producing polymeric materials via a thermal front that propagates through the unreacted monomer/initiator solution, the behavior of self propagating front shows various dynamic patterns depending on the reaction condition. We have obtained some spin modes of propagating front in the number of 'hot spots' or 'spin heads' by changing the reaction condition. The effect of the reactor tube diameter on the mode of propagating front has also been studied by using some reactor tubes with different size of tube diameter and it has been examined in some detail by adopting an experimental method of two-tubes system.

• Computers and Concrete
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• v.10 no.1
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• pp.79-93
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• 2012

This paper estimates theoretically the diffusion-reaction behaviour of sulfate ion in concrete caused by environmental sulfate attack. Based on Fick's second law and chemical reaction kinetics, a nonlinear and nonsteady diffusion-reaction equation of sulfate ion in concrete, in which the variable diffusion coefficient and the chemical reactions depleting sulfate ion concentration in concrete are considered, is proposed. The finite difference method is utilized to solve the diffusion-reaction equation of sulfate ion in concrete, and then it is used to simulate the diffusion-reaction process and the concentration distribution of sulfate ion in concrete. Afterwards, the experiments for measuring the sulfate ion concentration in concrete are carried out by using EDTA method to verify the proposal model, and results show that the proposed model is basically in agreement with the experimental results. Finally, Numerical example has been completed to investigate the diffusion-reaction behavior of sulfate ion in the concrete plate specimen immersed into sulfate solution.

• Proceedings of the Korean Geotechical Society Conference
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• 2010.03a
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• pp.1051-1060
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• 2010

In this study, the pressuremeter test (PMT) and the standard penetration test (SPT) were performed on the lateral pile loading tests site to evaluate the coefficient of subgrade reaction, which is used for load-deformation behavior analysis of laterally loaded piles by elastic subgrade reaction method. As a result, widely used empirical formulas of the coefficient of subgrade reaction by N values of SPT is evaluated conservatively lateral behavior of piles. While the method of directly used PMT results and evaluation method of the coefficient of subgrade reaction considering deformation moduli of soil and a pile diameter that is able to estimate very similar to actual load-deformation behavior of laterally loaded piles in deformation range of 0.5%-1.0% of a pile diameter.

• Journal of the Korean Society of Safety
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• v.26 no.5
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• pp.46-53
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• 2011

The risk assessment of thermal behavior and runaway reaction cased by an exothermic batch process in manufacture of the vinyl acetate resin are described in the present paper. The aim of the study was to evaluate the risk of runaway reaction with operating parameters such as a reaction inhibitor, reaction temperature and a mount of methanol charged in the vinyl acetate polymerization process. The experiments were performed by a sort of calorimetry with the Multimax reactor system as a screening tool to investigate runaway reaction. From the experimental results, it was found that we could occur the auto acceleration for reaction of raw materials with operating parameters over $65^{\circ}C$ of reaction temperature in the vinyl acetate polymerization process.

• Journal of Korean Academy of Nursing
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• v.30 no.3
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• pp.606-618
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• 2000

The purpose of this study was to identify the level of Symptoms of Stress, Stress Reaction, Health Promoting Behavior, and Quality of Life in Korean Immigrant Middle Aged Women. The subjects of this study were 33 middle aged women who live in Seattle, Washington, U.S.A. Data collection was performed at the U.W from Oct. 1998 to May. 1999. Data collection time was one hour and data was collected through 4 types of questionnaires : SOS, Health Promoting Behaviors, Quality of Life and Demographic data form, and the Physiologic Stress Profile was collected by J&J I-410 biofeedback equipment. The data was analyzed by descriptive statistics and the pearson correlation coefficient using the SAS program. The results of this study are as follows: 1. The level of physiological stress reaction and stress symptoms showed high level and quality of life showed low in general. 2. The Stress Reaction and Symptoms of Stress showed significant negative correlation with health promoting behavior, quality of life in the middle aged women. 3. The health promoting behavior showed significant positive correlation with quality of life in the middle aged women. In conclusion, the physiological stress reaction, symptoms of stress, and health promoting behavior were major influencing factor to quality of life in Korean Immigrant Women. From the results of the study, the following recommendations are presented as follow: 1. It is suggested that the study for developing the health promotion program focused on stress self-regulation for Korean immigrant women. 2. It is suggested that the comparative study for Korean immigrant women and Women in Korea. 3. It is necessary to broaden the scope of nursing practice for middle aged healthy women, so nurses can include a health promotion program focused on stress self-regulating as part of nursing care.

• Journal of Korean Society of Water and Wastewater
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• v.18 no.5
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• pp.656-665
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• 2004

An Ozone reaction model combined with CFD(Computational Fluid Dynamics) technique was developed in this research, in the simulation of ozonation, hydrodynamic behavior as well as reaction model is important because ozone is supplied to treated water as gas ozone. In order to evaluate hydrodynamic behavior in an ozone contactor, CFD technique was applied. CFD technique elucidated hydrodynamic behavior in the selected ozone contactor, which consisted of three main chambers. Three back-mixing zones were found in the contactor. The higher velocities of water were observed in the second and third compartments than that in the first compartment. The flow of the opposite direction to the main flow was observed near the water surface. Based on the results of CFD simulation, the ozone contactor was divided into small compartments. Mass balance equations were established were established in each compartment with reaction terms. This reaction model was intended to predict dissolved ozone concentration, especially. We concluded that the model could predict favorably the mass balance of ozone, namely absorption efficiency of gaseous ozone, dissolved ozone concentration and ozone consumption. After establishing the model, we discussed the effect of concentration of gaseous ozone at inlet, temperature and organic compounds on dissolved ozone concentration.

• Polymer(Korea)
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• v.25 no.6
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• pp.848-854
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• 2001

The crystallization behavior of poly (ethylene terephthalate) (PET) /ethylene-methyl acrylate-glycidyl methacrylate copolymer (E-MeA-GMA) blend was studied. The extent of reaction and the reaction rate between PET and E-MeA-GMA were measured with torque rheometer, FT-IR and SEM. The effects of the grafting reaction on the crystallization behavior were investigated with DSC and time-resolved light scattering (TR-LS) techniques. The morphological change at the lamellar level was also examined by using a small angle X-ray scattering (SAXS) method.

• Journal of Power System Engineering
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• v.5 no.4
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• pp.74-81
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• 2001

The infiltration behavior of molten Al-alloy, microstructures, hardness, and the interfacial reactions of $SiC_p/Al$ composites fabricated by the pressureless infiltration technique were investigated. It was made clear that both the weight fraction of SiC reinforcement and additive Mg content considerably influenced on the infiltration behavior of the molten Al-alloy matrix. Complete infiltration of molten Al-alloy achieved under the conditions that weight fraction of SiC content is more than 30wt%, and additive Mg content is more than 9wt%. Interfacial region of Al-alloy matrix and SiC reinforcement phase, $Mg_2Si$ was formed by the reaction between Mg and SiC. Another reaction product AlN was also formed by the reaction between Al-alloy matrix and gas atmosphere nitrogen.

• Macromolecular Research
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• v.13 no.3
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• pp.180-186
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• 2005

A novel bifunctional dye composed of spirobenzopyran and a cinnamoyl moiety was prepared and its photochromic behavior under the illumination of monochromatic UV light was investigated. This colorless bifunctional dye exhibits typical photochromism in both the film and in solution, through the structural and geometrical transformation from spirobenzopyran to merocyanine accompanied by a photocrosslinking reaction between the cinnamoyl moieties. Two kinds of photochemical reaction were selectively achieved by irradiation with monochromatic UV light at wavelengths of 275 and 365 nm, respectively. The effect of the selective photochemical reaction on the photochromism of the dye and its decaying behavior was investigated.