• 대한공업교육학회지
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• v.31 no.1
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• pp.211-225
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• 2006

Gabion can be used for the purpose of preventing overflow of river and side loss of road. However the manufacturing process of the gabion is manually controlled especially to the joining process at the terminal part of gabion with small diameter wire. In this paper automatic feeding guide system was designed and fabricated to make automation. The fabricated system was tested in the factory level. Pneumatic system was considered as the main idea of the feeding system. 3/2-way and 5/2-way manual control valve, eight double-acting cylinders were used. The system took 46.48 seconds during a cycle. Additional environmental noise and vibration were not detected when the machine operated at the working area. Based on the theoretical simulation and actual test the fabricated system was well controlled. The system was applied to the patent in 2006.

• 대한공업교육학회지
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• v.30 no.2
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• pp.72-81
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• 2005

The purpose of this study is to do research on correlation between multiple intelligence and e-Learning strategy, which can be used to develop and strengthen e-Learning strategy. The subject was 183 college students of engineering at C university who had ever taken a lesson through e-Learning. Two items are investigated in these college students. One is whether there is a gap and any gender-related difference in multiple intelligence and e-Learning strategy, and the other is what multiple intelligences have an effect on e-Learning strategy. The e-Learning strategy developed by In-Sock Lee and the instrument by Yong-Lin Moon were used. The results of this study are as follows. First, it appeared that there was a difference between gender in musical intelligence and naturalistic intelligence. The average of musical intelligence was higher in female collegian, while the average of naturalistic intelligence was higher in male collegian. But there was no gender-related difference in using e-Learning strategy. Second, it appeared that multiple intelligence gave an explanation of self-direction intelligence up to 31.1%, expression strategy 20.35%, and information processing strategy 16.6%. The results of this study showed that logical-mathematical intelligence affected all of three e-Learning strategies. So, new curriculum which can make use of logical-mathematical intelligence needs to be developed so as to devise efficient e-Learning strategies.

• 대한공업교육학회지
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• v.32 no.2
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• pp.155-170
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• 2007

The purpose of this study was to estimate key competencies according to their levels in order to understand person's ability in automobile fields of school and workplace. For this study, key competencies consisting of mathematical skills, problem solving skills, communications skills, self management and development skills, resources recycling skills, interpersonal relationship skills, technological skills, information skills, organizational understanding skills were determined. We examined the related literatures to determine the level of key competencies and diverse opinions were accommodated with visits to workplace in order to enhance the validity of the results of this study. Based on the results of this study, it was concluded that the estimation of key competencies according to their levels was possible and valid.

• 대한공업교육학회지
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• v.31 no.1
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• pp.110-128
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• 2006

This study investigates the relationship between self-regulated learning ability, learning style and the degree of learning participation in on-line learning. After a four-year university course was constructed in an on-line learning environment and open on-line courses for a semester, in order to recognize the degree of learning participation, an analysis of system log files and notification of the number of bulletins were performed. The result indicates that self-regulated learning ability has a static correlation with the degree of learning participation, and that learning style is not statistically meaningful. Also, the relationship between self-regulated learning ability and learning style was not statistically meaningful. As to the learning style, researchers expected most students would be convergent, but 63.4 per cent of students (52 students) displayed dispersion. In conclusion, when on-line learning is designed, a proper self-regulated learning strategy will help better learning achievement.

• 대한공업교육학회지
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• v.44 no.2
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• pp.65-85
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• 2019

This study is aimed to analyze vocational high school teachers' different perceptions on implementing High School Credit System in relation to their teaching subjects(the vocational high schooland the specialized subjects). The result indicates that the specialized subject teachers perceive the value of the prerequisites for implementation of High School Credit System more strongly than the common subject teachers. Otherwise, the result reveals that no significant difference exists between the common subject teachers' perceptions and the specialized subject teachers' perceptions of the external environment improvement, the operational modes, the characteristics of vocational high schools and the factors related to successful implementation of High School Credit System.

• 대한공업교육학회지
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• v.31 no.2
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• pp.364-380
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• 2006

This paper presents a procedure for designing command to maneuver flexible structure with very little residual vibration, even in the presence of modeling errors. For the open loop maneuver, the various shaped profiles using multiple step inputs delayed in time are considered for robustness and compared with the responses of rigid body and flexible body in virtue of simulations and experiments. Input shaping generates vibration-reducing shaped commands through convolution of an impulse sequence with the desired command. A flexible model with a cylindrical hub and four symmetric appendages is considered to examine the responses to real plant, and to illustrate the effectiveness of the proposed shapers. The appendages are long and flexible, leading to low frequency vibration under any control action. It is shown by a series of simulation that a properly designed feedback controller with input shaper performs well, as compared with open loop controller with input shaper. The control objective is to achieve a fast settling time of residual vibration to flexible structure and robustness (insensitivity)to plant uncertainty, to eliminate residual vibration.

• 대한공업교육학회지
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• v.33 no.2
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• pp.325-339
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• 2008

In this paper, we developed a module that can execute the data acquisition of the real-time measured radiant rays in the specific part of the nuclear power station. This module that includes the RF communication function, paces around the power station, being loaded on robot and can obtain the generated radiant rays in the various places through the detecting devices. It is considered that this new developed radiant rays acquisition method will have the higher degree of efficiency as compared with the existing method and reduce the expenses of the maintenance and repair work.

• 대한공업교육학회지
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• v.34 no.2
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• pp.87-102
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• 2009

The aim of this study is to select lesson contents of "Manufacturing Processes" textbook and to provide means to improve the compilation strategy based on the 2007 revised national curriculum. For accomplishing this purpose of the study, reviews of "Manufacturing Processes" textbook by 7th national curriculum and questionaries are conducted. Contents organization of lessons is done by specialists. The results are as followed: first, Changing in contents organization of units and chapters in "Manufacturing Processes" textbook based on the 2007 Revised National Curriculum is confirmed. Second, learning subjects of lessons are reformed and complemented. Third, contents organization of units, chapters, lessons are indicated.

• 대한공업교육학회지
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• v.36 no.2
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• pp.257-272
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• 2011

The field of Construction Engineering leads 1970's industry of the Korea. As a result of development of construction technology, It secure national competitiveness winning overseas contracts many kinds of plant, building and so on. In this situation, it is the most important task to cultivate and select construction teacher to train construction education and to foster construction skilled workers be going into the field of construction. This Study attempts to offer useful implications about the improvement of the Teacher Certification Examination through analyzing that will have a strong influence and be a standard in educational direction to cultivate construction teacher.

• 대한공업교육학회지
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• v.34 no.2
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• pp.321-330
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• 2009

This study presents the blow molding of injection stretch-blow molding process for PET bottle. The numerical analysis of the blow molding of PET bottle is considered in this paper using CAE with a view to minimize the thickness difference. In order to determine the design parameters and processing conditions in blow molding, it is very important to establish the numerical model with physical phenomenon. In this study, a shell model with thickness has been introduced for the purpose and blow simulations with 3-type blow process condition are carried out. The simulations resulted in the thickness distribution in good agreement with the physical phenomenon. Also, from the result of numerical analysis, we appropriately predicted the thickness distribution along the PET bottle wall and Using the result of numerical analysis we apply the preform design and blow molding process condition for optimization.