• Bulletin of the Korean Chemical Society
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• 제31권9호
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• pp.2603-2606
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• 2010

Novel soluble triazoleimide oligomers terminated with arylacetylene terminated were synthesized by the Cu(I)-catalysed 1,3-dipolar cycloaddition polymerization of diazides and imide-containing dialkyne. Several molecular weight triazoleimide oligomers were prepared from diazide and dialkyne monomers with different stoichiometric combinations. The curing behaviors of the oligomers were tested by differential scanning calorimetry (DSC). The thermal properties of the cured products were evaluated by DSC and thermogravimetric analysis (TGA). These cured oligomers showed the glass transition temperature of about $225-235^{\circ}C$ and the decomposition temperature (at 5% weight loss) of about $385-393^{\circ}C$ in nitrogen.

• 한국학교보건학회지
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• 제19권1호
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• pp.31-43
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• 2006

Purpose: The purpose of this study was to identify the effects of sex education on middle school boys' perception about obscene materials and self identity. Methods: This study was employed, using pretest-posttest of nonequivalent control group design. Data were collected from April 1st to May 14th, 2005. The subjects were recruited from two middle boys' school in Incheon which have similar class accomplishments and financial statues. Sampling method was used 70 students were assigned to experimental group and 74 students to control group. The 45 minutes sex education was given 4 times within 3 weeks to the experimental group. Four weeks later after education has finished, post test was done. The data were analyzed using Chi test, Fisher's exact test and t -test by SPSS. Results: The 1st hypothesis 'The experimental group which received sex education will have a higher score of perception about obscene materials than control group' was supported(t = 3.370, p = .001). The 2nd hypothesis 'The experimental group which received sex education will have a higher score about self identity than the control group' was supported(t = 1.997, p = .048). Conclusion: This study showed that sex education effectively helps middle school boys to have right perception about obscene materials and to promote self identity.

• 공학교육연구
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• 제21권4호
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• pp.20-27
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• 2018

In this paper, we conducted an analysis of existing materials of material mechanics, surveying educational demands, and selecting art fields for mechanical engineering in collaboration with experts in the fields of aesthetics and renaissance in order to develop educational materials conversed with humanities and arts. In addition, as a core education tool for convergence education, it was developed with an education kits that can be disassembled, assembled and carried by students. As a results of research, education materials were introduced various arts, linked to the engineering thinking. And measurement experiments of material characteristics were carried in a general classroom using developed education kits. From a paper results, the artistic sensitivity of the students will be enhanced and the students' creative problem solving ability will be improved as the ultimate goal of convergence education.

• 한국가정과교육학회지
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• 제5권1호
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• pp.61-85
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• 1993

Because of the specificity of subjects belong to middle school curriculum of Home Economics Education of function training is very important. but it pointed out that the existing standards are out-dated, and because of it , it incongruent to our realities. Therefore, whenever the curriculum o education and the national textbook are reorgrnized periodically, the reform of standards of educational materials & facilities must be followed by it. But in my opinion, in korean middle school, especially in Home Economics Education, educational facilities are not reformed at a proper time. Therefore to enhance the qualities of experimentation/practice of Home Economics Education, in the first place, the preparation for the given conditions of standards of educational materials & facilities are needed. But the educational facilities of Home Economics Education have many problem not only in the qualitative aspect but also in the quantitative aspect. And in addition to it, lost of educational facilities which cannot match contents of national textbook of Home Economics Education are exist. Therefore this thesis aims at examining comprehensively the problem of experimentation /practice of experimental materials & facilities of Home Economics Education connect with contents of Home Economics Education, holding several problems of experimentation/practice of Home Economics Education in middle school, grouping ; the principles and ways concerning the innovation experimental materials & facilities of Home Economics Education by which many teachers and students make sure of more efficient teaching/studying, and obtaining basic data which guarantee the ability of innovation concerning problems of the education of experimentation/practice of Home Economics Education. Method are : 1)grasp our educational realities with my original(question). 2)Integrate/analyse results of 1) 3)check the frequency, percentage with methods of X$^2$-test, T-test, and ‘One-way Analysis of Variances’. 4)suggest my own alternative proposal.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제4권2호
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• pp.79-93
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• 2000

The purpose of this article is to introduce the gifted education of mathematics in Korea. We first discuss what is going on in Korea for mathematics education for gifted students. The curriculums for the institutes for gifted education are mentioned. Some focus of this article is proposing some teaching materials that are actively utilizing many basic concents of cryptography and super-string theory, along with careful use of calculators and computers. Many of the materials haven been designed with problem-posing approach on through invoking the cognitive conflict.

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2007년도 The 1st International Symposium on Advanced Magnetic Materials
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• pp.302.2-302.2
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• 2007

• 한국분말재료학회지
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• 제26권1호
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• pp.40-44
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• 2019

Tungsten trioxide ($WO_3$) is a promising candidate as a photocatalyst because of its outstanding electrical and optical properties. In this study, we prepare $WO_3$ thin films by electrodeposition and characterize the photocatalytic degradation of methylene blue using these films. Depending on the voltage conditions (static and pulse), compact and porous $WO_3$ films are fabricated on a transparent ITO/glass substrate. The morphology and crystal structure of electrodeposited $WO_3$ thin films are investigated by scanning electron microscopy, atomic force microscopy, and X-ray diffraction. An application of static voltage during electrodeposition yields a compact layer of $WO_3$, whereas a highly porous morphology with nanoflakes is produced by a pulse voltage process. Compared to the compact film, the porous $WO_3$ thin film shows better photocatalytic activities. Furthermore, a much higher reaction rate of degradation of methylene blue can be achieved after post-annealing of $WO_3$ thin films.

• 한국재료학회지
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• 제31권3호
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• pp.132-138
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• 2021

Electrochromic devices (ECDs) have been drawing great attention due to their high color contrast, low power consumption, and memory effect, and can be used in smart windows, automatic dimming mirrors, and information display devices. As with other electronic devices such as LEDs (light emitting diodes), solar cells, and transistors, the mechanical flexibility of ECDs is one of the most important issue for their potential applications. In this paper, we report on flexible ECDs (f-ECDs) fabricated using an all-in-one EC gel, which is a mixture of electrolyte and EC material. The f-ECDs are compared with rigid ECDs (r-ECDs) on ITO glass substrate in terms of color contrast, coloration efficiency, and switching speed. It is confirmed that the f-ECDs embedding all-in-one gel show strong blue absorption and have competitive EC performance. Repetitive bending tests show a degradation of electrochromic performance, which must be improved using an optimized device fabrication process.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2007년도 춘계학술대회
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• pp.240-240
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• 2007

• International Journal of Advanced Culture Technology
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• 제10권1호
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• pp.42-46
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• 2022

To cultivate talented people with creative and convergent thinking skills to live in the era of the 4th industrial revolution, the national curriculum of Korea is gradually emphasizing convergence education and software education. To meet the demands of the times, this paper suggests subject-convergent teaching-learning materials for educating core principles of Support Vector Machines, especially targeting elementary learners. Based on analysis of the national curriculum, achievement standards of three subjects are integrated. After printable worksheets for traditional face-to-face classes had developed, they were transformed to online interactive worksheets for non-face-to-face classes. The teaching-learning materials are expected to promote the growth of the learners' academic motivation and knowledge.