• 한국초등과학교육학회지:초등과학교육
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• 제29권2호
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• pp.186-194
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• 2010

The purpose of this study is developing a Science Drawing Program to improve Science Process Skills and examining the effect of it. For this study two classes (missed classes with boys and girls) of 3th grade students participated and the subject of the instruction was domain of Air and Weather. The result of this study were as follows: First, the Science Drawing Program was effective in improving the science process skills. Development and Application of the Science Drawing Program brought positive effects especially on the observation, measurement, reasoning power. Second, student showed positive recognition on the Science Drawing Program. Many students showed interests and want to use it in class. And they thought Drawing Program helpful in their learning. Therefore the Science Drawing Program is very effective method in science education.

• 한국초등과학교육학회지:초등과학교육
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• 제31권4호
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• pp.532-540
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• 2012

The purpose of this study was to examine the effect of utilization of drawing skills in elementary science class on improving scientific drawing. The learning program has been developed for 5th grade students in the regular classes in order to enhance scientific drawing skills. The program was composed of three steps, understanding the kinds of drawing, imitating sample drawing, representing through observation. The developed program was verified by the science education scholars and teachers. Students trained during 3 hours with scientific drawing skills step by step. As a result, students significantly improved skills in scientific drawing skills. Furthermore, the effect was sustained after a month. On the other hand, there were no statistically meaningful differences on scientific attitudes and preferences.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1996년도 춘계공동학술대회논문집; 공군사관학교, 청주; 26-27 Apr. 1996
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• pp.341-345
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• 1996

We have developed the drawing and part information management system that could integrate drawing information with corresponding part information in design process. The modules developed include the drawing information management (DIM) and the part information management(PIM). DIM consist of processing drawing management, approved drawing management, disused drawing management, and drawing print management. PIM consist of new part management, option management, and part change management. Errors which may occur in the design process can be reduced by reference to part information directly. In addition, the number of parts can be reduced by minimizing the frequency of new parts generation through the systematic management.

• 한국초등과학교육학회지:초등과학교육
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• 제35권1호
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• pp.54-64
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• 2016

The purpose of this study is to develop instructional strategy which utilizes thinking maps focused on drawing as a measure to enhance science learning motivation, self-directed learning activity and science academic achievement of learners, and to examine the effects of its application. The target unit for this study is 'life cycle of plants' in the fourth grade of elementary school. Two classes of 4th grades of elementary school were selected and divided into two groups. The learners of experimental group have completed thinking map by drawing a picture to express the results to be observed and measured, and used it to arrange the learning contents. The result of this study is as follows. First, it is proven that using thinking maps focused on drawing actually helped improving the motivation of learners to study science. Second, it is proven that this strategy was effective to change their self-directed learning ability in positive ways. Third, it contributed to the improvement of learners' science academic achievement. We found out that the application of this strategy enabled them to enjoy the mapping using drawing, to be immersed in learning, to better recognize the scientific concepts and the structure of learning contents, and to have a positive awareness of the usefulness of thinking maps focused on drawing.

• 한국초등과학교육학회지:초등과학교육
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• 제29권4호
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• pp.496-504
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• 2010

In this study, we analyzed request methods and demanding levels of drawing activities in teacher's guide and supplementary book (experimental observation). Student's drawing results were also compared to teacher's guide and supplementary books demanding. As a result, drawing activities of supplementary book were reached to 42.8% of all activities. Activity types were divided to writing, drawing, writing and drawing and writing or drawing activities. Writing and drawing activity type was 44.4%, and drawing activity was 37.8%. The level of teacher's guide were higher than normal needs. But answer examples and learning levels of teacher's guide were appropriate for curriculum levels. The students drawing activities were matched to requirements of the teacher's guide to 72.3% in grade 3 level and 64.5% in 4th grade level. In order to improve effectively learning, statement of supplementary book and teacher's guide should write more concrete words and creative sentences.

• 한국염색가공학회지
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• 제33권3호
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• pp.147-152
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• 2021

Bulk polymerization was used to produce poly(vinyl acetate) with different molecular weights, which were then saponified to prepare poly(vinyl alcohol) (PVA) with different molecular weights. With P_n of 2,060 and 3,240, the optimum film formation concentrations of PVA were found 7.5wt.% and 6.5wt.%, respectively. The drawing characteristics of the PVA film prepared at the optimum film formation concentrations were experimented, as well as the thermal characteristics of the PVA film based on the drawing ratio were observed. When the drawing velocity was fixed, it was found that the drawing ratios of all samples decreased as the heat band gap increased, and the melting temperature of the PVA film slightly increased as the drawing ratio increased regardless of the P_n of PVA.

• 대한금속재료학회지
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• 제47권5호
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• pp.274-282
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• 2009

To investigate the evolution of deformation texture in dual phase (DP) steels during deep-drawing deformation, deep-drawing experiments were performed. Microtexture measurements were conducted using electron backscattered diffraction (EBSD) to analyze texture evolution. A rate-sensitive polycrystal model was used to predict texture evolution during deep-drawing deformation. In order to evaluate the strain path during deep-drawing deformation, a steady state was assumed in the flange part of a deep-drawn cup. A ratesensitive polycrystal model successfully predicted the texture evolution in DP steels during deep-drawing deformation. The final stable orientations were found to be strongly dependent on the initial location in the blank. Texture analysis revealed that the deep drawability of DP steels decreases as the true strain in the radial direction of the deep-drawn cup increases during deep-drawing deformation.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2000년도 춘계공동학술대회 논문집
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• pp.721-723
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• 2000

Deep Drawing공정은 2차원 박판(Sheet Metal)에 그림이나 글자를 인쇄한 다음, 박판을 다이에 고정하고 펀치로 눌러서 3차원의 제품을 생산하는 소성가공의 한 방법이다. 그러므로, 2차원 평면인 박판에 어떻게 적절히 인쇄하여, 가공 후의 3차원 제품에 원하는 그림과 글자가 나타나게 할 수 있는지가 문제가 되고 있다. 본 논문에서는 Deep Drawing공정을 거쳐 완성된 제품을 측정한 후, 형상 역공학(Reverse Engineering) 기술을 이용하여 측정 데이터(Measured Points Data)를 입력으로 하는 매개변수 곡면 (Parametric Surface)을 만들고, Deep Drawing공정 전의 박판에 대한 매개변수 곡면을 만든 다음 두 곡면간의 매핑을 통해 위의 문제점을 해결하고자 한다.

• 한방비만학회지
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• 제10권1호
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• pp.17-28
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• 2010

Objectives It is significant to determine the validation of a self-administered somatotype drawing for the simple assessment of childhood obesity in elementary school and clinical practice. Methods The subjects were 202 children(112 boys and 90 girls) who answered a questionnaire for somatotype drawing and weremeasured for body components with bioelectrical impedance. The somatotype drawing of children was analysed according to the three criteria of childhood obesity - BMI percentile, obesity index and percent body fat, respectively. Results BMI, waist-hip ratio, skeletal musclemass and proteinmass had significant differences(p<.05) between boys and girls. Somatotype drawing had the highest correlation with BMI in both boys and girls, and also showed a high correlation with BMI percentile, obesity index and percent body fat.According to these criteria of childhood obesity, the somatotype drawing was the best consistent with the obesity index, next turn was the percent body fat and then the BMI percentile. Conclusions The validation of somatotype drawing for the assessment of childhood obesity was analysed according to BMI percentile, obesity index and percent body fat, and the somatotype drawing was the best consistent with obesity index in both boys and girls.

• Journal of the Optical Society of Korea
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• 제7권2호
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• pp.79-83
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• 2003

In this paper, we describe the fabrication process of a photonic crystal fiber and present the measured optical properties of the photonic crystal fiber. The fabrication of the photonic crystal fiber involves stacking, jacketing, collapsing, and drawing using a conventional drawing tower The photonic crystal fiber drawing needs higher tension to maintain the uniform air hole structure. Thus, the temperature of the photonic crystal fiber drawing is lowered by a few hundred degrees Celsius than for the case of conventional optical fiber drawing. The optical properties of the fabricated photonic crystal fiber such as mode profile, optical loss, transmission spectrum, bending loss, and polarization dependent loss are measured.