• Progress in Superconductivity and Cryogenics
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• v.15 no.3
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• pp.29-34
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• 2013

This paper introduces design processes of 10 MW class superconducting generator for wind Turbine. Superconducting generator can produce 5 times stronger magnetic field than permanent magnet at least, which enables large scale wind turbine to function as a lighter, smaller and more highly efficient system. These processes are targeted for higher efficiency and shorter high temperature superconductor (HTS) wires to fabricate 10 MW class superconducting generator. Three different approaches will be described in these design processes. First design process focuses on the number of rotor poles. Secondly, 270 and 360 A operating current of superconducting field coil can be adapted as a design parameter in this process. Lastly, 3 and 6 kV line to line voltage of stator coil will be used to design 10 MW class superconducting generator.

• Journal of the Korea Society of Computer and Information
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• v.3 no.3
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• pp.47-53
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• 1998

This Paper describes design and implementation of the Class Library Management System(CLMS) that is used to efficiently software reuse. Communication softwares are various and wide. They continually must be modified themselves for new demand. maintained previous modules, and extended for new service. Software reuse will have been enhanced of software quality and software developer's productivity The CLMS consists of the Class Register, the Class Retriever, and the Class Browser. The CLMS considered reuse of source code and SDL design specifications.

• ETRI Journal
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• v.33 no.3
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• pp.393-400
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• 2011

A systematic approach for the design of two-stage class AB CMOS unity-gain buffers is proposed. It is based on the inclusion of a class AB operation to class A Miller amplifier topologies in unity-gain negative feedback by a simple technique that does not modify quiescent currents, supply requirements, noise performance, or static power. Three design examples are fabricated in a 0.5 ${\mu}m$ CMOS process. Measurement results show slew rate improvement factors of approximately 100 for the class AB buffers versus their class A counterparts for the same quiescent power consumption (< 200 ${\mu}W$).

• Journal of Fashion Business
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• v.23 no.5
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• pp.124-136
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• 2019

Capstone design is a creative and comprehensive educational program requiring practical adaptation skills for the industry. The purpose of this study was to analyze the results of design development, lectures and curriculum satisfaction for textile fashion products based on four years of capstone design curriculum from 2015 to 2018. The curriculum consists of 26 groups of 72 students and a total of 26 final results were obtained via industry-university cooperation. The materials for product design development included differentiated clothing, leisure goods, bags, dog goods, smart goods, interior goods and recycled products based on textiles. The degree of satisfaction with lectures involving the capstone design class was very high, with 4.2 out of 5.0 when the number of students was less than 10. However, when the number of students was 20 or higher and the number of students was large, the level of satisfaction was below 3.88. Therefore, the capstone design class comprising less than 10 students was better at individual teaching and teamwork. In terms of satisfaction with capstone design curriculum, the respondents indicated that the teaching method addressing the needs of industry and academia facilitated practical learning. It was very helpful in improving competency related to the design and development majors and future employment. The capstone design curriculum was effective in the training for practical design development and planning.

• Journal of Korean Physical Therapy Science
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• v.28 no.1
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• pp.62-75
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• 2021

Background: The world has entered the age of biotechnology and artificial intelligence, and encouraging students to test the value of information and knowledge ie to become information fluent, is becoming more important. The education system is also changing in order to adapt to the times. As a part of this, the cultivation of creative talent is a core goal of many nation states, and Israel's Jewish education methods are attracting attention; havruta (or chavrusa) is one such method. This study aims to effects of havruta class on learning attitudes and class satisfaction in a class of college physical therapy students. Design: Pretest-posttest design. Methods: The subjects were 95 students in College A. The learning attitudes questionnaire were used by the Korea Educational Development Institute, and the class satisfaction questionnaire before and after intervention. Results: The results showed significant differences in learning habits about physical therapy of learning attitudes (p<.05) and class methods and contents attention and understanding (p<.05), class interest of class satisfaction (p<.05). Conclusion: These results suggest that havruta class improves learning attitudes and class satisfaction. Therefore, follow-up study is needed to apply the havruta class in various students and teaching methods.

• Journal of Ocean Engineering and Technology
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• v.35 no.2
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• pp.141-149
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• 2021

The A60 class deck penetration piece is a fire-resistance apparatus installed on the deck compartment to protect lives and to prevent flame diffusion in the case of a fire accident in a ship or offshore plant. In this study, the sensitivity of the fire-resistance performance and approximation characteristics for the A60 class penetration piece was evaluated by conducting a transient heat-transfer analysis and fire test. The transient heat-transfer analysis was conducted to evaluate the fire-resistance design of the A60 class deck penetration piece, and the analysis results were verified via the fire test. The penetration-piece length, diameter, material type, and insulation density were used as the design factors (DFs), and the output responses were the weight, temperature, cost, and productivity. The quantitative effects of each DF on the output responses were evaluated using the design-of-experiments method. Additionally, an optimum design case was identified to minimize the weight of the A60 class deck penetration piece while satisfying the allowable limits of the output responses. According to the design-of-experiments results, various approximate models, e.g., a Kriging model, the response surface method, and a radial basis function-based neural network (RBFN), were generated. The design-of-experiments results were verified by the approximation results. It was concluded that among the approximate models, the RBFN was able to explore the design space of the A60 class deck penetration piece with the highest accuracy.

• Journal of Korean Elementary Science Education
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• v.37 no.2
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• pp.93-109
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• 2018

The purpose of this study was to analyze the character of the creative design processes that appear at the creative design stage of the design thinking based on STEAM class and what factors affect the creative design process. Students who served as the subjects of this study were 4 elementary school students. We developed the design thinking based on STEAM program to look more specific the creative design process. The project was conducted with a total of 12 sheets of paper materials. The conclusions of this study are as follows. First, the problem solving process of the design thinking based on STEAM classes is not anticipatory and is cyclical and complex. So, teachers should provide sufficient time for students to create and simulate ideas and accept the solving problems through trial and error. Second, Having presented the STEAM class as a practical problem in the real world, there was less fear of students' failure and heightened motivation and enthusiasm. Providing with the real topic and open questions in classrooms can lead to students' voluntary participation in the classroom. Third, In the design thinking based on STEAM class, students develop concrete ideas through visualization courses. The group of students made the best solutions through communication.

• Journal of the Korea Society of Computer and Information
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• v.24 no.4
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• pp.195-204
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• 2019

In this paper, we propose the way to solve the problems of current college of education at university that they are running a curriculum that is insufficient for immediate application to the school. So, we analyzed the application of capstone design which is proven to be effective in various fields, and constructed a curriculum for the development of educational materials to improve the teacher's qualification in the college of education and applied them to the preliminary informatics teachers. As a result, we confirmed that the development class of educational materials based on capstone design is positive for the change of awareness about informatics teacher's qualification, and also confirmed that the students' satisfaction level about class is higher. Based on the results, we discussed the effects of applying capstone design to the college of education. The conclusions are as follows: First, it helps students to improve the teacher's qualification. Second, it is a curriculum that can fill the shortage of student teaching. Third, the curriculum is an effective curriculum for the recognition of the student who is in charge of evaluation, and the teacher who is in charge of the evaluation. Fourth, Capstone design information textbook study class is a method of greatly improving class satisfaction compared to lecture class.

• Journal of Engineering Education Research
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• v.21 no.4
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• pp.10-19
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• 2018

This study introduces an engineering design class which is experimental in a sense that it is planned and implemented with three key concepts such as learner-centered education, living lab and community based learning. With the class run in being connected with one regional community in Seoul, it focuses on its educational effects acquired through the living lab-based approach. And this research investigates the student's experiences of when, what and how they learn in a learner-centered class. It shows that, rather than taking professor's one dimensional lectures in classroom, the students learn actively when they face with the problem in the field. Students have come to carry out engineering design from the perspective of stakeholders, not from the supplier or producer's perspective in the process of meeting with the problem in reality. Team based collaborative activities are crucial in the entire design process. More importantly, students' design products have been transformed into more useful and meaningful ones as stakeholders of the local community have participated into the students' works. However, we need to recognize that there are some important issues that need to be solved institutionally and systematically in order for such educations to spread. This study suggests several educational arrangements for those issues.

• The Journal of the Acoustical Society of Korea
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• v.19 no.4
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• pp.69-76
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• 2000

In this research, with the FEM we analyzed the variation of the sound pressure and thermal distribution of a Class IV Flextensional transducer in relation to its material properties and structures. Based on the results, we determined optimal structure of a Class IV Flextensional transducer that had maximum sound pressure, minimum thermal distribution, and 1 kHz resonance frequency. The sound pressure by the optimal structure is higher than that of the basic structure by two times, and the thermal distribution is much lower. Results of the present work can be utilized to design Class IV Flextensional transducers of various resonance frequency, maximum sound pressure, and minimum thermal distribution.