• Proceedings of the Korea Society of Mathematical Education Conference
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• 2007.06a
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• pp.37-50
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• 2007

What is a foundational element of plane geometry? Isn't it possible to constitute the contents of plane geometry from that element? In this paper, we suggest a view point that triangle is a foundational element of plane geometry. And take some examples of reconstruction of usually given contents and mathematical activity centered on the triangle in plane geometry.

• Korean Institute of Interior Design Journal
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• v.24 no.3
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• pp.205-212
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• 2015

This study starts at the at-risk children(the students in the margins)' needs for the inclusive education environment who increased lately. It is studied in the limited scope, which is about spacially 'playground' and 'Sensory integrative therapy' in terms of the special education therapy. The 6 environmental setting principles are suggested, which is redefined in terms of suitable for applying to the environment design based on the training way and arbitration principle of J. Ayres' Sensory integrative therapy. And then various environment design methods are drawn from above-mentioned 6 principles, they are categorized in 4 elements for environmental setting - sensory element, behavior element, mental element and design expression element. This trial brings daily practice of therapeutic stimulate to sensory integration dysfunction children, and sensory experiential diversity promoting development to general children. Expecially it has some advantage that at-risk children(the students in the margins) feel a sense of belonging as a member of society.

• Journal of the Korean Society of Clothing and Textiles
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• v.30 no.1 s.149
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• pp.12-19
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• 2006

This study was administered to identify features of masstiege high-end products by comparing to original old high-end products. For this purpose, the differences in shopping orientation between each consumer groups by product types(high-end products, original old high-end products) preferred were examined. 300 female consumers were surveyed and 279 data were used for analysis. The results are as follows. First, three elements(efficiency, enjoyment, convenience) of shopping orientation were constructed by factor analysis and efficiency element of all elements had highest explanation power. The differences in shopping orientation between masstiege high-end products and original old high-end products were identified by t-test. The consumers preferring original old high-end products regarded convenience element as an important factor and the consumers preferring masstiege high-end products considered efficiency element more. The correlation analysis between shopping orientation factors and demographic characteristics were administered. The consumers who were of low age, low education, low income and unmarried pursued efficiency more, the consumers who were unmarried, of high education and high income showed to pursue enjoyment more, and the consumers who were of high age, high education, high income and married considered convenience element more. Finally marketing strategies for masstiege brands were suggested.

• 한국정보교육학회:학술대회논문집
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• 2011.01a
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• pp.47-51
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• 2011

The aim of Information Education is to improve the problem-solving skills based on Computational Thinking. In the current elementary school curriculum, there is no independent information subject. So, it will get used to browse the sub-element being applied implications for Computational Thinking through an analysis of teaching and leaning elementary mathematic scene. In this paper reveal the relationship sub-element of the Computational Thinking for solving problems through teaching and learning scene in elementary mathematics.

• Geomechanics and Engineering
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• v.19 no.3
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• pp.241-254
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• 2019

A finite element approach is presented to examine ground vibration characteristics under various moving loads in a homogeneous half-space. Four loading modes including single load, double load, four-load, and twenty-load were simulated in a finite element analysis to observe their influence on ground vibrations. Four load moving speeds of 60, 80, 100, and 120 m/s were adopted to investigate the influence of train speed to the ground vibrations. The results demonstrated that the loading mode in a finite element analysis is reliable for train-induced vibration simulations. Additionally, a three-dimensional finite element model (3D FEM) was developed to investigate the dynamic responses of a track-ballast-embankment-ground system subjected to moving loads induced by high-speed trains. Results showed that vibration attenuations and breaks exist in the simulated wave fronts transiting through different medium materials. These tendencies are a result of the difference in the Rayleigh wave speeds of the medium materials relative to the speed of the moving train. The vibration waves induced by train loading were greatly influenced by the weakening effect of sloping surfaces on the ballast and embankment. Moreover, these tendencies were significant when the vibration waves are at medium and high frequency levels. The vibration waves reflected by the sloping surface were trapped and dissipated within the track-ballast-embankment-ground system. Thus, the vibration amplitude outside the embankment was significantly reduced.

• Journal of the Chungcheong Mathematical Society
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• v.6 no.1
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• pp.59-64
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• 1993

In this note, we shall give a maximal element existence theorem for condensing multimaps in a locally convex Hausdorff topological vector space.

• Journal of Korean Classical Literature and Education
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• no.16
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• pp.207-235
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• 2008

This study investigated the formation of communication education which is based on the contemporary language education. Concretely I watched chronologically the proportion of culture element and behavior element, its change, and the contents of writing education. To achieve this, I took the ancient Greek language education as the main materials. The sophists are right if we think only the empirical world, because of the changeability of external world and the relativity of sense. On the other hand, Platon emphasized the ability of abstract thought which is inherent in the human inside. But today's education only emphasizes the 'expression' which came from the Platonic thought. So students fills their devastated inside with arbitrary idea in this history-forgotten social circumstance. It is very beneficial to make subject have some cultural studies and to enhance the sensation on the world through the writing of representation because these can be good to the growth of subject. It is our-not as educator but as a predecessor of human being-duty to set the catalogue of cultural studies of this age and to make students feel the fundamental harmony and the beauty of the world.

• Journal of Family Resource Management and Policy Review
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• v.10 no.4
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• pp.65-85
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• 2006

The purposes of this study are to classify housewives based on their perception of benefits sought of preschool child education commodity and to identify the characteristics of each type. For empirical analysis, the data for this study were collected from 400 full-time housewives with preschool child living in Seoul. The statistical methods adopted fur data analysis are cluster analysis, one-way ANOVA, Duncan's multiple range test and discriminant analysis. The major findings of this study are as follows : First, four housewives' types can be categorized by the level of those 3 dimensions. The name fur the types was given as 'sticking to one's belief type', 'taking importance to early stimulation type' 'conforming to and imitating others type', and 'believing blindly in education commodity type'. Second, the result of discriminant analysis shows that 'housewives' education level and their education-related values' element was the most crucial in classifying the housewives, and 'considering child's characteristics and educational home environment' element was the next. The results of this study suggest several implications fur the education of parents with preschool child. Parents' education programs differentiated by the objects and the problems should be developed : which are suitable for each housewives' type.

• The Pure and Applied Mathematics
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• v.12 no.2 s.28
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• pp.153-159
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• 2005

We investigate the error estimates of the h and p versions of the finite element method for an elliptic problems. We present theoretical results showing the p version gives results which are not worse than those obtained by the h version in the finite element method.

• Nuclear Engineering and Technology
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• v.56 no.6
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• pp.2282-2291
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• 2024

In this work we study the effects of different factors of dislocation loop on its obstacle strength when interacting with an edge dislocation. At first, the interaction model for dislocation and dislocation loop is established and the full and partial absorption mechanism is obtained. Then, the effect of temperature, size and burgers vector of dislocation loop are investigated. The relation between the obstacle strength and irradiation dose has been established, which bridges the irradiation source and microscale properties. Except that, the obstacle strength of C, Cr, Ni, Mn, Mo and P decorated dislocation loop is studied. Results show that the obstacle strength for dislocation loop decorated by alloy element decreases in the sequence of Cr, Ni, Mn, C, P and Mo, which could be used to help parameterize and validate crystal plasticity finite element model and therein integrated constitutive laws to enable accounting for irradiation-induced chemical segregation effects.