• Macromolecular Research
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• v.12 no.2
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• pp.189-194
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• 2004

When water is evaporated quickly from a water-based colloidal suspension, colloidal particles protrude from the water surface, distorting it and generating lateral capillary forces between the colloidal particles. The protruded colloidal particles are then assembled into ordered colloidal crystalline domains that float on the water surface on account of their having a lower effective density than water. These colloidal crystal domains then assemble together by lateral capillary force and convective flow; the generated colloidal crystal has grain boundaries. The single domain size of the colloidal crystal could be controlled, to some extent, by changing the rate of water evaporation, but it seems very difficult to fabricate a single crystal over a large area of the water's surface without reorienting each colloidal crystal domain. To reorient such colloidal crystal domains, a glass plate was dipped into the colloidal suspension at a tilted angle because the meniscus (airwaterglass plate interface) is pinned and thinned by further water evaporation. The thinning meniscus generated a shear force and reoriented the colloidal crystalline domains into a single domain.

• Structural Engineering and Mechanics
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• v.32 no.1
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• pp.37-53
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• 2009

In this paper the problem of calculating the probability that the responses of a wind-excited structure exceed specified thresholds within a given time interval is considered. The failure domain of the problem can be expressed as a union of elementary failure domains whose boundaries are of quadratic form. The Domain Decomposition Method (DDM) is employed, after being appropriately extended, to solve this problem. The probability estimate of the overall failure domain is given by the sum of the probabilities of the elementary failure domains multiplied by a reduction factor accounting for the overlapping degree of the different elementary failure domains. The DDM is extended with the help of Line Sampling (LS), from its original presentation where the boundary of the elementary failure domains are of linear form, to the current case involving quadratic elementary failure domains. An example involving an along-wind excited steel building shows the accuracy and efficiency of the proposed methodology as compared with that obtained using standard Monte Carlo simulations (MCS).

• Bulletin of the Korean Mathematical Society
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• v.39 no.4
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• pp.687-704
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• 2002

We show that the class of inner chordarc domains is properly contained in the class of exterior quasiconvex domains. We also show that the class of exterior quasiconvex domains is properly contained in the class of John disks. We give the conditions which make the converses of the above results be true. Next , we show that an exterior quasiconvex domain satisfies certain growth conditions for the exterior Riemann mapping. From the results we show that the domain satisfies the Bernstein inequality and the integrated version of it. Finally, we assume that f is a function which is continuous in the closure of a domain D and analytic in D. We show connections between the smoothness of f and the rate at which it can be approximated by polynomials on an exterior quasiconvex domain and a $Lip_\alpha$-extension domain.

• Journal of Korean Elementary Science Education
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• v.29 no.4
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• pp.389-400
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• 2010

This study is focused on analyzing effects of Self-regulated learning on Academic self-regulation, Science achievement and Science Related Affective Domains. The subjects of this study were sampled from fifth grades of a elementary school in Seoul, 61 students. One class (31 students) out of selected two classes was applied to Self regulated learning Teaching Model, the other (30 students) took conventional methods of teaching. The experiment proceeded for 21 weeks, 51 times of classes. According to the results of this study, Self-regulated learning improved the children's Academic self regulation ability. Self-regulated learning improved the children's science achievement. Self-regulated learning improved the children's Science Related Affective Domains. Furthermore, six distinct dimensions of Academic self-regulation have correlation with scientific attitudes, interests of Science Related Affective Domains.

• Korean Journal of Child Studies
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• v.24 no.6
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• pp.47-60
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• 2003

This study analyzed the pattern of preschool children's abilities based on Project Spectrum and compared the relationship between intelligence domains with working styles of children. Generally, children showed both strengths and weaknesses in specific Spectrum domains, but some children had only strengths and others had only weaknesses without strengths. It appeared that working style does not relate to children's strong domains, but individual disposition was reflected by characteristics of the task. During both individual and group spectrum activities, children with strengths were more "easily engaged in activity", "confident", and "focused" than those without strong intelligence domains. During individual activities, the "reflective" domain showed children with strengths in intelligence domains are more reflective than those without strengths.

• Korean Journal of Mathematics
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• v.22 no.4
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• pp.591-598
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• 2014

Let D be an integral domain with quotient field K. In [1], the authors called D a finitely valuative domain if, for each $0{\neq}u{\in}K$, there is a saturated chain of rings $D=D_0{\varsubsetneq}D_1{\varsubsetneq}{\cdots}{\subseteq}$ $D_n=D[x]$, where x = u or $u^{-1}$. They then studied some properties of finitely valuative domains. For example, they showed that the integral closure of a finitely valuative domain is a Pr$\ddot{u}$fer domain. In this paper, we introduce the notion of finitely t-valuative domains, which is the t-operation analog of finitely valuative domains, and we then generalize some properties of finitely valuative domains.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.11C
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• pp.1060-1067
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• 2005

In this paper, we generalize the shift-invariance properties of linear time-frequency distributions to the fractional Fourier domains that interpolate between the time and frequency domains. Magnitude-wise shift invariance in arbitrary fractional Fourier domains distinguishes the short-time Fourier transform (STFT) among all linear time-frequency distributions and simplifies the interpretation of the resultant distribution. We prove that the STFT is the only linear distribution that satisfies the magnitude-wise shift-invariance property in the fractional Fourier domains.

• Korean Journal of Childcare and Education
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• v.16 no.3
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• pp.79-98
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• 2020

Objective: The purpose of this study was to examine children's disclosure to parents in different domains of their daily activities. Methods: The participants were 340 children(100 kindergarteners, 120 3rd graders and 120 6th graders in elementary school) and their mothers in Seoul and Gangwon-do, Korea. The data was analyzed with one-way ANOVA, paired t-test, and MANOVA. Results: First, 3rd graders and 6th graders experienced more daily activities than kindergarteners in most domains. Second, 3rd graders disclosed more than kindergarteners and 6th graders in most domains. The response of mothers with 3rd graders was most similar to their children's response about children's disclosure to parents. Third, the reasons for nondisclosure of children were different according to domains. The reasons for nondisclosure of children that mothers perceived were different from those of their children, especially in the school(institute)-related domain. Conclusion/Implications: The results of this study indicated that the aspects of children's disclosure to parents were different according to domains of their daily activities based on developmental stages. Mothers perceived their children's disclosure differently compared to their children. The results suggest that it is necessary to approach children's disclosure to parents based on domains of daily activities and developmental stages.

• Child Health Nursing Research
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• v.24 no.1
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• pp.68-77
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• 2018

Purpose: The purpose of this study was to develop parent coaching domains for the health management of childhood leukemia survivors. Methods: In this study, we conducted a literature review and in-depth interviews with 6 parents of childhood leukemia survivors who were identified using convenience sampling. We identified areas of parent coaching through the 4 stages of the GROW model, which are: goal setting, realistic grasp, confirmation of realization, and search for alternatives. Results: Nine domains and 27 subcategories emerged from the study. The 9 parent coaching domains for the health management of childhood leukemia survivors were routine life management, education and information provision, emotional support for the surviving children, social support for the surviving children, follow-up management, family support, school life management, symptom management, and improvement of growth and development. Conclusion: This research developed 9 parent coaching domains for the health management of children surviving leukemia. The results of this study are expected to contribute to the efficient health management of childhood leukemia survivors by enabling practitioners to continuously identify new coaching domains as needed for their health management. Researchers should improve the health management of childhood leukemia survivors by developing nursing interventions for these new coaching areas.

• Journal of the Korean Mathematical Society
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• v.60 no.2
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• pp.407-464
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• 2023

Let R be a commutative ring with identity. The structure theorem says that R is a PIR (resp., UFR, general ZPI-ring, π-ring) if and only if R is a finite direct product of PIDs (resp., UFDs, Dedekind domains, π-domains) and special primary rings. All of these four types of integral domains are Krull domains, so motivated by the structure theorem, we study the prime factorization of ideals in a ring that is a finite direct product of Krull domains and special primary rings. Such a ring will be called a general Krull ring. It is known that Krull domains can be characterized by the star operations v or t as follows: An integral domain R is a Krull domain if and only if every nonzero proper principal ideal of R can be written as a finite v- or t-product of prime ideals. However, this is not true for general Krull rings. In this paper, we introduce a new star operation u on R, so that R is a general Krull ring if and only if every proper principal ideal of R can be written as a finite u-product of prime ideals. We also study several ring-theoretic properties of general Krull rings including Kaplansky-type theorem, Mori-Nagata theorem, Nagata rings, and Noetherian property.