• Journal of Electrical Engineering and Technology
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• v.10 no.5
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• pp.1921-1929
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• 2015

The smart substation is the heart of a transmission system, which is particularly emphasized as the most significant composition of smart grids in China. In order to assess the functionality performance of substation technologies, this paper presents methods used to identify the most promising solutions for smart substation design and to evaluate the technical levels of available technologies. The multi-index optimization model is presented to address the issue of smart substation planning. A mathematical model of the planning decision problem is established with multiple objectives consisting of economic, reliability, and green key indices, and many kinds of concerns including physical and environmentally friendly operations are formulated as a set of constraints. With respect to the assessment of the technical level regarding integration of advanced technologies into a substation, a modified grey whitenization weight function is adopted to structure a novel grey clustering method. The proposed grey clustering approach is used to overcome the difficulty of insufficient quantitative assessment capacity for traditional methods. The evaluation of technical effects provides the classification definition for the development phase and the maturity level of the smart substation. The effectiveness of the proposed approaches in planning decision-making and evaluation of construction efforts is demonstrated with case studies involving the actual smart substation projects of Wenchongkou substation in China Southern Power Grid (CSG) and Mengzi substation in State Grid Corporation of China (SGCC).

• Journal of Science Education
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• v.41 no.3
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• pp.281-296
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• 2017

The purpose of this study is to explore the science learning motivation of technical high school students through comparison with general high school students. 596 high school students and 1063 general high school students participated in the study. Three statistical methods were used for data analysis: two-way ANOVA, independent sample t-test, and Pearson correlation analysis. The results showed that the interaction between school type and grade had a significant effect on the difference of students' motivation for science learning. There was a significant difference in learning motivation among general high school students according to academic year, while there was no significant difference between first and second grader of technical high school students. Especially, technical high school students showed low level of science learning motivation compared to the students in general high school. The correlations among five motivational factors of science learning motivation were also significantly lower than that of general high school students. Lastly, the result of correlation analysis between science motivation and academic achievement showed that second year students in technical high school had less correlation coefficients than the first year students. Given these results, it is necessary to develop a educational strategy for enhancing science learning motivation of technical school students. We will discuss the direction of science education for technical high school based on our findings.

• Journal of Fisheries and Marine Sciences Education
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• v.29 no.3
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• pp.689-701
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• 2017

In recent offshore industries, various ambiguous terms have been used without clear definition or classification, causing difficulties in legal, technical, and educational understanding and usage. For an example, the commonly used term of 'Offshore Plant' in Korea is not an universal word technically. There has been no clear technical or legal definition about the 'Offshore Plant' and its classification is also very ambiguous; sometimes it is used to refer offshore oil and gas production platform or it is used to mean offshore renewable power generation plant in some cases. To build a conceptual framework, therefore, this paper suggests a classification of offshore units (1) using internationally agreed terms, (2) agreed with the technical classification used by the ship classification society and (3) being able to include not only the current but also future concepts of offshore units.

• Journal of Engineering Education Research
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• v.13 no.1
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• pp.3-16
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• 2010

This paper is about to research the contents of writing course to foster communication skills for engineering students. Some domestic college writing textbooks were analyzed to list the course contents. Studying 'technical writing' leads to identify the materials for both basic composition skills and technical writing skills. Then some reasons for selecting those materials and things about professors for the course as well as teaching the course are discussed. Developing proper textbook and the techniques for teaching those materials is a valuable task for the writing course.

• Journal of Engineering Education Research
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• v.14 no.2
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• pp.30-39
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• 2011

There is a problem that some spoken words are not consistent with the written words when Arabic numerals in Korean language are read. Since some rules for reading the Arabic numerals are not clear, the numerals should be read carefully by recognizing the position of the numbers in sentence, the relationship of the numerals with measurement nouns and other writing elements, and context. In view of technical writing, this work is to appreciate some rules for writing Korean numerals in place of Arabic numerals by studying the works regarding numerals, classifiers and measurement nouns.

• Journal of Engineering Education Research
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• v.23 no.4
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• pp.52-65
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• 2020

This study aims to find the major creative ideation patterns embedded in the commercially valuable patents in the mobile communication industry. For the purpose, we analyze 171 cases of the patent infringement lawsuit filed by Nokia in the United States. It is examined that what kind of TRIZ inventive principles and SIT thinking tools were applied to resolve technical contractions in each of the 171 cases respectively. Among the 40 inventive principles of TRIZ, 'feedback' principle was used mostly and 'division' principle the next. Among the 5 thinking tools of SIT, 'attribute dependency' mostly used, and 'division' the next. This suggests that what kind of inventive principles or thinking tools should be considered preferentially to resolve technical contradictions in practically important technical problems in the mobile communication industry.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.315-318
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• 2018

대부분의 대학생들은 재학기간 중에 학교에서 운영되는 교육프로그램, 자원봉사, 어학연수, 동아리활동 등 다양한 경험을 하게 된다. 최근에는 학교에서 운영하는 교육프로그램이 더욱 다양해지고 많은 학생들이 참여하고 있다. 하지만 학교에서는 학생들이 어떤 활동을 했는지 효율적으로 관리하고 참여 학생의 적극적인 참여율 유도가 필요가 있지만, 이를 효율적으로 관리하는 것은 어려운 일이다. 본 연구는 학교에서 시행중인 다양한 프로그램들에 대하여 학생들이 참여함에 따라 학생들의 참여현황을 조사하여 관리하고 참여율과 학과별 통계를 Dashboard로 열람할 수 있는 프로그램을 개발하여 운영하였다. 교육 참여 관리 시스템을 활용함으로써 담당자의 업무 효율을 기대할 수 있고 체계적인 학생들의 교육 프로그램을 효율적으로 모니터링하고 관리할 것으로 기대된다.

• Journal of Fisheries and Marine Sciences Education
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• v.28 no.2
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• pp.356-365
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• 2016

The purpose of this study was to verify the influences of sport enjoyment factors on recreation specialization of water sports participants. The study conducted a research survey through purposive sampling method after selecting 4 water sports center in Busan. 260 questionnaires distributed and 246 were selected as final valid sample by removing 14 questionnaires that have insufficient answers. Then data were analyzed through exploratory factor analysis, reliability analysis, correlation analysis, and multiple regression analysis using SPSS Window ver. 20.0. The results were as followings. First, the enjoyment factors have a positive effect on recreation specialization. Second, escaping from daily routine and improving technical skill dimensions of enjoyment factors have an influence on centrality of life. Third, improving technical skill dimension of enjoyment factors have a positive effect on past experience. Lastly, flow and improving technical skill dimensions of enjoyment factors have an influence on economic investment.

• Advances in aircraft and spacecraft science
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• v.8 no.1
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• pp.69-85
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• 2021

A modified fuzzy mechanical control of large-scale multiple time delayed dynamic systems in states is considered in this paper. To do this, at the first level, a two-step strategy is proposed to divide a large system into several interconnected subsystems. As a modified fuzzy control command, the next was received as feedback theory based on the energetic function and the LMI optimal stability criteria which allow researchers to solve this problem and have the whole system in asymptotically stability. Modeling the Fisher equation and the temperature gauge for high-speed aircraft and spacecraft shows that the calculation method is efficient.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.299-300
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• 2020

본 논문에서는 머신러닝, 데이터 처리 학습을 위한 EPL 기반 D.I.Y 실습 플랫폼을 통한 학생들의 학습을 통합 관리, 학습 능률 향상, 학습 흥미 유도하고 나아서 학생의 학습 패턴을 분석해 그에 적절한 강의 추천을 목표로 하는 지능형 통합 학습 관리 플랫폼을 제안한다.