• Corrosion Science and Technology
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• 제21권5호
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• pp.381-389
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• 2022

Cyclic Voltammetry and weight loss measurements were used to investigate corrosion prevention of tin in a 0.5M citric acid solution containing Anthocyanins extracted from grapes at various concentrations and temperatures. Results showed that the investigated chemicals, Anthocyanins extracted from grapes, performed well as tin corrosion inhibitors in 0.5M citric acid. Increasing the concentration of Anthocyanins increased their corrosion inhibition efficiencies. When the temperature dropped, their inhibition efficiencies, increased indicating that higher temperature tin dissolution predominated the adsorption of Anthocyanins at the surface of tin metal. When inhibitor concentrations were increased, their inhibition efficiencies were also increased. These results revealed that corrosion of tin metal was inhibited by a mixed type of adsorption on the metal surface. The adsorption isotherm of Langmuir governed the adsorption of Anthocyanins. Thermodynamic parameters such as the enthalpy of adsorption, the entropy of adsorption, and Gibbs free energy and kinetic parameters such as activation energy, enthalpy of activation, and entropy of activation were computed and discussed in this study.

• EDISON SW 활용 경진대회 논문집
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• 제5회(2016년)
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• pp.377-380
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• 2016

Safety is the most important factor in skyscrapers. The fact that skyscrapers can contain many facilities and people is one of its many advantages. However external pressure such as earthquakes or wind might make accidents that lead to casualties. Because of its large size, small accidents still make big scale of damage. In this paper, we tried to find out what kind of factors affected the movement of skyscrapers using the 'One Dimentional Forced Damped Oscillation Interpretation Software'. Then we researched how to minimize the damage caused by it and the way to correspond to it.

• 한국과학교육학회지
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• 제33권5호
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• pp.1007-1020
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• 2013

본 연구는 과학-예술통합 수업을 진행하고 있는 초등 교사들의 과학-예술통합 활동에 대한 인식과 수업의 접근법, 어려움 및 개선방안을 탐색하는 것을 목적으로 한다. 이를 위하여 초등학교 3학년에서 6학년을 담당하는 교사 12명을 연구 참여자로 선정하였다. 자료 수집은 연구 참여자와의 심층 면담을 통해 이루어졌으며, 면담 시간은 60분에서 90분으로 이루어졌다. 면담은 연구 참여자의 과학-예술통합 수업에 대한 인식과 수업에서의 목표 및 강조점, 어려움 및 개선방안 등을 물어보는 형식으로 이루어졌다. 연구 결과, 초등 교사들은 과학-예술통합 수업이 과학 개념의 재정리, 긍정적인 태도 향상, 적극적인 수업 참여 유도, 자유로운 의사표현의 긍정적인 교육적 효과를 지니고 있다고 인식하고 있었다. 또한 수업 접근법에서는 교사들은 과학 개념의 재정리, 추상적 과학 개념의 시각화, 예술 과목과의 연계의 세 가지 측면에서 과학-예술통합 활동을 수업에 적용하고 있었다. 한편 초등 교사들은 수업 자료의 부족과 외부 환경의 제약, 학생간의 편차로 인해 과학-예술통합 활동을 활용하는 데에 어려움을 겪고 있었다. 이러한 교사들의 인식은 다양한 수업 자료의 보충 및 교사의 역량 강화 필요성에 대한 요구로 이어졌다. 결론 및 제언에서는 이상의 연구 결과를 바탕으로 초등 교육에서 과학-예술통합 수업에 대하여 시사점을 논의하였다.

• 한국초등과학교육학회지:초등과학교육
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• 제34권2호
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• pp.224-237
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• 2015

In this study, in regard to the change of the paradigm to STEAM (Science, Technology, Engineering, Arts, and Mathematics), we have looked into the ways to apply scientific inquiry through the arts, discussed the educational implications for the ways to step forth with the science and the arts in educational field. In the development of the strategies related to the optical illusion arts, to make sure that the design-oriented science education to reach its goal to make effective teaching, students need to be understood in the method of the artistic designs. Totally it had two rounds for inspection about operation of the convergence with curriculum. As a result, students changed attitude to concentrate in class naturally while doing their art work, participating in person rather than simply looking. It is caused by the scientific approach to strategy of illusion arts. In addition, we could see that students change into a proactive manner as well as teachers comments that they are communicate and make a complete the work with others. A lot of researches give that science can provide the ideas as a method to arts, arts can provide creative ideas to science, but it is still lacking that research can be applied to education specifically on how to. An efforts in the number of collaborative research will continue to introduce, as this study STEAM of science and arts in the field of education be shifted paradigm.

• 대한화학회지
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• 제55권5호
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• pp.882-886
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• 2011

• Journal of Magnetics
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• 제16권4호
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• pp.337-341
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• 2011

The magnetic and magnetocaloric properties of $Gd_{1-x}Ce_xAl_2$ (x = 0, 0.25, 0.5, 0.75) intermetallic compounds alloys have been investigated in detail for the first time. XRD patterns indicated that all the samples were crystallized in a single phase with $MgCu_2$-type structure (Laves phase). Ce substitution for Gd increased the lattice parameters and decreased the Curie temperature from 163 K for x = 0 to 37 K for x = 0.75. A maximum entropy change of 3.82 J/kg K was observed when a 2 T magnetic field was applied to the x = 0 sample. This entropy change decreased with increasing Ce content to 2.04 J/kg K for the x = 0.75 sample.

• International Journal of Computer Science & Network Security
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• 제21권12호
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• pp.61-64
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• 2021

The work is devoted to the problem of modernization of the higher education system of Ukraine through the integration of higher education institutions into the European Higher Education Area. Based on the analysis of statistical data, a conclusion was made about the collapse of the higher education system of Ukraine due to a number of problems, which negatively affects the formation of human capital. The importance of international cooperation with the EU in the field of education for the modernization of higher education is substantiated. The institutional principles of formation are investigated, the main priorities of its development at the present stage are determined. The legal bases of European integration of higher education in Ukraine are analyzed. An analysis of the development of international cooperation of Ukrainian universities and their participation in European educational programs. There is a positive tendency to increase the activity of Ukrainian universities in international cooperation, which increases their position in international rankings. Weaknesses of integration processes are revealed and directions of improvement of higher education are offered.

• 대한화학회지
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• 제12권4호
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• pp.190-193
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• 1968

액체구조의 천이상태 이론을 용융염에 확장시켜 액체없이 상태합을 유도하였다. 이 상태함을 액체할로겐화알칼리들에 적용시켜 증기압, 몰부피, 엔트로피등의 열역학적 성질을 계산한 결과 측정치와의 좋은 일치를 보여주었다.

• International Journal of Computer Science & Network Security
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• 제21권11호
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• pp.333-337
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• 2021

The article reveals the essence of cyber socialization influencing the process of education and development. The general and potential possibilities of cyber socialization in the process of using the cyberspace of the Internet environment are presented. The sudden transition to distance learning in the spring of 2020 put the pedagogical community in the face of problems related to the content, organizational and methodological basis of the educational process. During the training in distance mode, a rich experience was gained in the use of information and communication technologies. The article discusses the techniques and methods of teaching using the capabilities of information and communication and digital technologies.

• 대한화학회지
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• 제21권3호
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• pp.187-192
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• 1977

2-amino-5,6-dimethoxy-1,2,3,4-tetrahydronaphthalene hydrochloride를 2-nitro-3,4-dihydro-5,6-dimethoxy-(2H)-naphthalenone으로부터 합성하여서 Neber rearrangement로부터 얻은 2-amino-3,4-dihydro-5,6-dimethoxy-1(2H)-naphthalenone hydrochloride로부터 합성한 방법과 수득률 및 실업적인 조작을 비교 설명하였다.