• 한국수학교육학회지시리즈A:수학교육
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• 제38권2호
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• pp.179-187
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• 1999

Math teachers are very short of computer tools and manipulatives to use in geometry classes of middle schools for the development of spatial abilities. At most they can ask student to make regular polyhedrons for helping the students to understand by concrete experience, but this experience is not enough to develop spatial abilities in spatial figures including the regular polyhedrons. This article is to introduce instructional materials for development of spatical ability in the regular polyhedrons using computer software, Geometer's Sketchpad. In this article, students can imagine the whole figure through the parts of a plane figure and think of the parts from the solid figure by free movement from 2 dimensions to 3 dimensions, or from 3 dimensions to 2 dimensions. Also, the instructional materials devised in this article will be good to enhance spatial abilities because the relation of 1-1 correspondence in the movement of the parts can be conserved and observed precisely, which is very hard to demonstrate and visualize by paper-and-pencil. It is recommended that this kind of materials should be developed in various ways for teachers to use them directly in their geometry classes.

• The Journal of Korean Physical Therapy
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• 제24권5호
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• pp.325-333
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• 2012

Purpose: The purpose of this study was to determine the concurrent validity between Figure-of-8 Walking Test (F8W), Berg Balance Scale (BBS), Four Squared Step Test (FSST), and Timed UP and GO Test (TUG) in patients with stroke. Methods: Forty two participants (26 men, 16 women, $55.0{\pm}11.72$) with at least three months post stroke who were able to walk at least 10 m without walking aid participated in this study. Assessment of concurrent validity between the F8W (time and steps) and BBS was performed using Spearman rank order correlation and between the F8W (time and steps), FSST and TUG assessed using Pearson correlation. Results: The time of the F8W showed correlation with BBS (r=-0.46, p<0.01), FSST (r=0.64, p<0.01), and TUG (r=0.81, p<0.01), and steps of the F8W showed correlation with BBS (r=-0.43, p<0.01), FSST (r=0.47, p<0.01), and TUG (r=0.51, p<0.01). Conclusion: The F8W is a valid measure of balance and walking skill among patients with stroke and may provide complementary information with regard to dynamic balance and functional walking for the real life of stroke patients.

• 한국정보통신학회논문지
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• 제15권4호
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• pp.897-904
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• 2011

본 논문에서는 CMOS 능동 인덕터를 이용하여 1.8GHz PCS 대역과 2.4GHz WLAN 대역에서 동조가 가능한 저잡음 증폭기의 새로운 회로구조를 제안하였다. CMOS 능동 인덕터 부하를 이용하는 저잡음 증폭기의 높은 잡음지수를 줄이기 위한 회로구조와 잡음지수를 더욱 감소시키기 위한 잡음상쇄기법을 적용하고 해석하였다. 이 동조가능 저잡음 증폭기를 $0.18{\mu}m$ CMOS 공정기술로 시뮬레이션을 수행한 결과는 잡음성능이 약 3.4dB 향상된 것을 보여주며, 이는 주로 제안된 새로운 회로구조에 기인한다.

• 한국의류학회지
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• 제16권1호
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• pp.111-122
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• 1992

Studying the dress style of the Buddhist Goddess of Mercy SU WOL KWAN EUM DO (Drawings on the Buddhist Goddess of Mercy who is watching the Moon reflected in the still water), it is composed of a splendid, jewel crown with five colors, a light and flimsy, non-colored veil with many kinds of gold·plated patterns. This gold·plated carapace figures on a scarlet ground are drawn on the veil and the oval-type flower figures mixed with a scarlet lotus blossom ard arranged. An arabesque pattern of BOSANGHWA (an imaginary, Buddhistic flower figure) is mainly used for both line decorations and necklace. Like this, various kinds and types of figures are in harmony in spite of many changes in figure design. The SU WOL KWAN EUM DO in Koryo dynasty is full of colorful, subtle, harmonious figures which are unique style, which cannot be found in japan, China, and so on. In other words, most of most of dress patterns which are shown in SU WOL KWAN EUM DO are China ink paintings with mountains and waters as its setting. In case of color painting, figure designs are seldom used. The dress pattern in SU WOL KWAN EUM DO of koryo dynasty is characteristic of its variety and magnificent colors.

• 보건의료산업학회지
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• 제6권1호
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• pp.205-218
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• 2012

This study aimed to identify influences of depression, anxiety and stress-coping aspect upon smoking desire of undergraduates, depending on their lifestyles. Method had analyzed each measuring item in a way of structural equation of SPSS17.0/AMOS 5.0, then reliability analysis was conducted. The measuring items included health-conscious, fashion-conscious, grade-conscious, physical figure-conscious and convenience-conscious in students' lifestyles had correlation with depression, anxiety and stress-coping aspect. Also it was studied if their depression, anxiety and stress-coping aspect had influences upon smoking desire. The result showed that students health-conscious, grade-conscious, and physical figure-conscious had correlation with depression and anxiety, and among them, those health-conscious, grade-conscious, and physical figure-conscious had led to smoking desire. Conclusion showed that students' lifestyles may accompany depression and anxiety, ultimately causing smoking desire. Accordingly, this study can be consider to develop smoking prevention educational programs and policies.

• 열처리공학회지
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• 제28권6호
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• pp.291-295
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• 2015

IGZO single layer and $IGZO/TiO_2$ bi-layered films were deposited on glass substrate at room temperature with radio frequency magnetron sputtering to investigate the effect of $TiO_2$ buffer layer on the electrical and optical properties of the films. For all deposition, the thickness of IGZO and $TiO_2$ Buffer layer was kept at 100 and 5 nm, respectively. In a comparison of figure of merit, IGZO films with a 5-nm-thick $TiO_2$ buffer layer show the higher figure of merit ($8.40{\times}10^{-5}{\Omega}^{-1}$) than that of the IGZO single layer films ($6.23{\times}10^{-5}{\Omega}^{-1}$) due to the enhanced optical transmittance and the decreased sheet resistance of the films. The observed results mean that a 5 nm thick $TiO_2$ buffer layer in the $IGZO/TiO_2$ films results in better electrical and optical performance than conventional IGZO single layer films.

• 분석과학
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• 제5권4호
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• pp.367-372
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• 1992

방사선 중성자 선원의 에너지 스펙트럼을 측정하기 위하여 액체 섬광 검출기(NE213)와 펄스모형 분리장치를 감마선 선원과 중성자 선원을 이용하여 그 감응 특성을 분석하였다. Am-Be 선원을 이용하여 이 장치에 대한 "Figure of Merit"을 측정한 결과 1.13 이었다. 이 값은 단색 에너지 중성자 선원인 $^{12}C(d,\;n)^{13}N$에서의 1.3 과 상당히 유사한 값을 보여 준다. NE213-PSD 장치의 성능 시험을 위한 이 실험결과는 중성자-감마 혼합 방사선장에서 스펙트럼의 측정과 중성자 에너지 스펙트럼과 속밀도 측정표준을 확립하는 데 기술적으로 유용하게 쓰일 것이다.

• Journal of information and communication convergence engineering
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• 제13권3호
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• pp.205-214
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• 2015

In this paper, we propose a new approach to learning a discriminative model for figure/ground segmentation by incorporating the bag-of-features and conditional random field (CRF) techniques. We advocate the use of image patches instead of superpixels as the basic processing unit. The latter has a homogeneous appearance and adheres to object boundaries, while an image patch often contains more discriminative information (e.g., local image structure) to distinguish its categories. We use pixel-level sparse coding to represent an image patch. With the proposed feature representation, the unary classifier achieves a considerable binary segmentation performance. Further, we integrate unary and pairwise potentials into the CRF model to refine the segmentation results. The pairwise potentials include color and texture potentials with neighborhood interactions, and an edge potential. High segmentation accuracy is demonstrated on three benchmark datasets: the Weizmann horse dataset, the VOC2006 cow dataset, and the MSRC multiclass dataset. Extensive experiments show that the proposed approach performs favorably against the state-of-the-art approaches.

• 한국전기전자재료학회논문지
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• 제30권2호
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• pp.81-85
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• 2017

$SnO_2/Ag/Nb_2O_5/SiO_2/SnO_2$ multilayer films were prepared on glass substrate by sequential using RF/DC magnetron sputtering at room temperature. The influence of top $SnO_2$ layer thickness on optical and electrical properties of the multilayer films was investigated. Experimentally measured results exhibit transmittances over 84.3 ~ 85.8% at 550 nm wavelength. As the top $SnO_2$ layer thickness increased from 40 to 55 nm, the sheet resistance (Rs) increased from 5.81 to $6.94{\Omega}/sq$. The Haacke's figure of merit (FOM) calculated for the samples with various $SnO_2$ layer thicknesses was a maximum at 45 nm ($35.3{\times}10^{-3}{\Omega}^{-1}$).

• 한국수학교육학회지시리즈A:수학교육
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• 제6권2호
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• pp.1-9
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• 1968

In mathematics, a definition must have authentic reasons to be defined so. On defining geometric figures, there must be adequencies in sequel and consistency in the concepts of figures, though the dimensions of them are different. So we can avoid complicated thoughts from the study of geometric property. From the texts of SMSG, UICSM and others, we can find easily that the same concepts are not kept up on defining some figures such as ray and segment on a line, angle and polygon on a plane, and polyhedral angle and polyhedron on a 3-dimensionl space. And the measure of angle is not well-defined on basis of measure theory. Moreover, the concepts for interior, exterior, and frontier of each figure used in these texts are different from those of general topology and algebraic topology. To avoid such absurdness, I myself made new terms and their definitions, such as 'gan' instead of angle, 'polygonal region' instead of polygon, and 'polyhedral solid' instead of polyhedron, where each new figure contains its interior. The scope of this work is hmited to the fundamental idea, and it merely has dealt with on the concepts of measure, dimension, and topological property. In this case, the measure of a figure is a set function of it, so the concepts of measure is coincided with that of measure theory, and we can deduce the topological property for it from abstract stage. It also presents appropriate concepts required in much clearer fashion than traditional method.