• 전력전자학회:학술대회논문집
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• 전력전자학회 2003년도 춘계전력전자학술대회 논문집(2)
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• pp.520-523
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• 2003

In this paper, heatsink design for high power converter is presented. There are many ways of designing heatsink, but air cooling is by far the most used and much more practical than any of the other methods. In this paper, the practical methods of cooling which include the method to reduce a noise and a vibration due to a fan and the method to design a gap resistance and a contact resistance due to mounting force between thyristor and heatsink is proposed. Finally, simulation and experimental results are described to verify validity of the proposed method.

• Structural Engineering and Mechanics
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• 제73권2호
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• pp.153-165
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• 2020

The effect of soil foundation plays active role in optimum design of steel space frames when included. However, its influence on design can be calculated after a long iterative procedure. So it requires longer computer time and more computational effort if it is done properly. The main purpose of this study is to investigate how these effects can be calculated in more practical way in a shorter time. The effects of semi-rigid column bases are taken into account in optimum design of steel space frames. This study is carried out by using JAYA algorithm which is a novel and practical method based on a single revision equation. The displacement, stress and geometric size constraints are considered in the optimum design. A computer program is coded in MATLAB to achieve corporation with SAP2000-OAPI (Open Application Programming Interface) for optimum solutions. Four different steel space frames including soil structure interaction taken from literature are investigated according to different semi-rigidly supported models depending on different rotational stiffness values. And the results obtained from analyses are compared with the results available in reference studies. The results of the study show that semi-rigidly supported systems in the range of appropriate rotational stiffness values offer practical solutions in a very short time. And close agreement is obtained with the studies on optimum design of steel space frames including soil effect underneath.

• International Journal of Costume and Fashion
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• 제13권1호
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• pp.11-22
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• 2013

This paper is focused on practical research regarding costume design and arts management that make use of local resources and which are influenced by local culture of Tokuji in Yamaguchi-city, located in a mountainous area in Yamaguchi Prefecture in the western part of Honshu in Japan. We will examine possibilities in fashion design through this study. This was a practical research project, done with cooperation between the university and local industry, with priorities being assigned by the requests of residents of the Tokuji area. In 2011 the Aurinko, Tokuji, Talo (it means the Solar Tokuji Building in Finnish) was decided as the base of activities. Other functions were gradually added on, including a salon for people of the area to exchange ideas and workshops for group discussions. This paper will specifically be focused on the handmade paper peculiar to Tokuji and traditionally used as a material in fashion. The fashion designs developed by this researcher's laboratory were strongly influenced by these styles of paper. These costumes were made with a handmade paper called "Kamiko" in Japan, that is aesthetic sense has been historically cherished. This paper suggests that the affluence and depth of costume design may be expressed not only by directly borrowing from these influences, but also by borrowing the traditional aesthetic sense original to Japan. Thus this paper will examine industry and culture simultaneously, examining in particular the impact of arts management and costume design using handmade paper manufactured locally.

• 한국의상디자인학회지
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• 제14권3호
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• pp.177-193
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• 2012

The purpose of this study is making a contribution to expand course of employment precluding students from fear and perception of danger related to establishing fashion business and improving self-confidence with practical businesses through an education experiencing in establishing fashion business with united both theory and practice. In this study, A Merchandise-Process consisting of researching, merchandising, marketing, selling has been applied after selection of fashion items by 4 groups of applicants. As a result, the result of these applicants's reaction has shown that most of them has improved self-confidence and felt a sense of accomplishment about practical businesses. The Applicant has experienced the market situation, realized reality of the business and formed human relationships with many people through the marketing. In conclusion, experience of applicants has shown that practical education is important because it was providing applicants with self-confidence of establishing fashion business, importance of teamwork and a sense of accomplishment about making a profit. Therefore, converting theoretical education to practical education is needed. A limitation of this study is that the detailed part of merchandising was omitted because the whole course of merchandising should be accomplished within a semester. To develop this study, detailed proceeding methods divided by one process is required.

• Human Ecology Research
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• 제53권4호
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• pp.447-461
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• 2015

This study developed an integrative curriculum design plan for Home Economics through a deliberation method. This study established a research framework to integrate the deliberation models of Schwab, Walker, and Reid that inherited the intellectual tradition of curriculum deliberation along with the practical reasoning process of Brown and Paolucci from a critical science perspective. The practical research problem was formulated as "What should be done to develop a Home Economics integrative curriculum?" To address this practical research problem, deliberation with deliberators of each small, medium, and large groups was processed for the development of integrative curriculum design plans. An initial proposal was developed from small group deliberation processes. An initial proposal was examined and an alternative plan was developed from medium group deliberation processes. An alternative plan and its consequence were re-examined from large group deliberation processes. The authors finalized a proposal organized on four valued ends of self-formation, intersubjectivity, social action, and life skills. A practical problem focused integrative curriculum was developed and proposed to pursue the four valued ends. The suggested final practical problem focused curriculum demonstrates the power of Home Economics to contribute to the advancement of individuals, families, and society as well as the practical empowerment of students.

• 품질경영학회지
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• 제24권2호
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• pp.25-43
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• 1996

This paper presents the optimal and practical constant-stress accelerated life test plans for the lognormal lifetime distribution tinder assumptions of intermittent inspection and Type-I censoring. In an optimal plan, the low stress level and the proportions of test units allocated at each stress are determined under given inspection scheme and number of inspections such that the asymptotic variance of the maximum likelihood estimator of a certain quantile at use condition is minimized. Although the practical plan adopts the same design criterion, it involves three rather than two overstress levels in order to compromise the practical deficiencies of the optimal plan. Computational experiments are conducted to choose an allocation plan and a inspection scheme of the practical plan and to compare with test plans over a range of parameter values.

• 공학교육연구
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• 제27권2호
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• pp.25-34
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• 2024

Due to the Covid-19 pandemic, it seems to have been impossible to run offline training courses. To overcome this situation, online training courses has been emerged. Just moving the educational environment from offline to online instead of re-designing the curriculum, however, is not effective for trainees. To maximize educational effectiveness, it is necessary to re-design the curriculum based on constructivist appoach which gives trainees experience on skills and knowledge about their job. As for re-designing the curriculum into real-time online practical learning based on constructivism, learning satisfaction and work efficacy of trainees may have been increased. From these results, HRD professionals in an IT company should need to consider how to structure the curriculum when they design the real-time online practical learnings.

• 한국세라믹학회지
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• 제31권1호
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• pp.11-16
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• 1994

The impedance matching solution map is not a sufficient method for designing the broad-band absorber because of its difficulty to get numerical data about practical band-width. Therefore, we develope a new method to design the broad-band absorber. The complex permeability limits, which is necessary for designing the broad-band absorber in C-X band (4 GHz~12.4 GHz) were investigated and application was also examined. The complex permeability limits represent the frequency dependence of the complex permeability at a practical frequency band. These complex permeability limits can be used effectively to design broad-band single-layered absorber because they offer numerical data about the band-width in the case of various dielectric loss tangent, practical frequency bands and permitted reflection losses of an absorber.

• 복식문화연구
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• 제8권4호
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• pp.537-548
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• 2000

This paper focuses on development of a fashion design education course that will foster the talent and aesthetic consciousness of fashion design student. The writer reached the content of the designing ideas to practical applications as the defined scope of fashion design education. For designing idea in practical application : matching ideas, contrasting ideas, formative combinations and revisionism were used. For design ideas, the ideas developed by 飯塚弘子, 万江入重子, 香川達子 were used in revision. To detail the content of design education, fashion magazines, portfolios, photographs and related fashion design educational materials were used. 1. Matching ideas : it proposes such identical expression into costume by making a research of developing material, application form and color extraction from design sources. 2. Contrasting ideas : it proposes such opposite expression into costume by making a research of opposite to image, form, position and purpose from some object. 3. Formative combinations : it proposes such new expression into costume by combining a detail of costume with the other object. 4. Revisionism : it proposes such modified expression into costume by making a research of deletion, change, addition and conversion in costume.

• 대한기계학회논문집B
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• 제31권2호
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• pp.125-131
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• 2007

This paper presents guideline for a practical design of the hybrid system combining a pressurized solid oxide fuel cell and a gas turbine. Design of the hybrid system based on a virtually designed gas turbine was simulated using models for off-design operation of the gas turbine. Two system configurations, with different method for supplying reforming steam, are considered and their design characteristics are compared. A higher design cell temperature provides better system performance. However, there exists a maximum allowable design cell temperature because the operating point of the compressor approaches the surge point with increasing fuel cell temperature. Increased pressure loss at the fuel cell moves the compressor operating point toward the surge point and reduces system performance.