• Design & Manufacturing
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• v.14 no.4
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• pp.46-51
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• 2020

The purpose of this study was to analyze the change in tensile strength characteristics of the weld when the welding speed and rotational speed of the tool, which are representative variables of the friction stir welding process. The equipment used in the experiment was Machining Center No. 5. The material used in the experiment is an AA6061-T6 alloy, and a rolled plate with a thickness of 2mm was used. Two experimental variables were selected, the welding speed of the tool and the rotational speed of the tool. The experimental conditions were selected in the range in which a healthy weld could be obtained through a preliminary experiment. The welding speed of the tool was increased to 100mm/min, 200mm/min, and 300mm/min, and the rotational speed of the tool was increased to 1000rpm, 2000rpm, and 3000rpm. As a result of the experiment, the tensile strength increased as the rotational speed of the tool changed at each tool welding speed. In addition, as the welding speed of the tool increased, the tensile strength of the weld was increased. The condition with the highest tensile strength of the weld was found to be a tool feed speed of 300 mm/min and a tool rotation speed of 3000rpm.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.651-652
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• 2023

코로나 팬더믹으로 인해 시작된 비대면 수업의 도입은 대학교육시스템에 변화를 가져왔다. 대학은 비대면 수업 운영에 대한 경험 및 학습자 만족도를 기반으로 비대면 수업을 대학 학사 운영에 활용하는 방안을 모색하기 시작하였다. 본 논문은 비대면과 대면이 혼합된 하이브리드 수업 운영에서 학습자들이 다양한 특성의 과목에서 만족한 수업방식과 의견을 조사·분석함으로써 비대면과 대면 수업을 혼합 활용하는 효과적 방안을 모색하는데 필요한 학습자 의견 도출에 그 목적이 있다. 조사 결과, 학습자들은 전반적으로 하이브리드 수업에 만족하고 있고, 과목 특성에 따라 비대면과 대면 수업의 장점을 혼합한 수업에 대한 학습효과를 올바르게 인식하고 있음을 알 수 있고, 수업 맞춤형 하이브리드 수업 운영을 선호하는 것으로 나타났다. 향후 대학은 학습자의 만족도를 높일 수 있는 하이브리드 수업 운영을 위한 제도 등을 마련하여 효과적인 수업 운영 및 활성화를 지원할 필요가 있다고 사료된다.

• Journal of Engineering Education Research
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• v.7 no.3
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• pp.19-31
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• 2004

This study is for the analysis on the basic engineering education for enhancing the quality of engineers at a local engineering school. Negative appraisal for the engineering education by industry, the decrease on the number of students applying for the colleges of engineering, the changes on the high school education make the engineering schools forced to improve the basic engineering education. For the starting point for the study, we have surveyed on the current engineering education by asking questions to professors, students and alumni of Hongik College of Science and Technology. Analyzing the survey results and considering the needs by industry, we have set the basic educational philosophy as educating practical engineers and have decided the goals of basic engineering education as changing to student oriented education, enhancing the field adaptation capability, improving the problem solving ability and introducing engineering design courses.

• Journal of Engineering Education Research
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• v.11 no.2
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• pp.50-64
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• 2008

The final goal of this study is to develop the in-service program of engineering education for professors of engineering college. In this study, survey research method using questionnaire was used to engineering professors of universities and junior colleges. The study contents were analysis of in-service status and educational needs for professors of engineering college. Statistical package SPSS for windows, korean edition version 10.0, was used for analysing data. To do it, 97 questionnaire were used finally. Educational needs was divided into engineering teaching method, engineering evaluation method, and engineering basic competancy. Equation suggested by Borich was induced to calculate the educational needs. Results were that educational needs of engineering teaching method and engineering basic competency were high, respectively, but, educational needs of engineering evaluation method was low. It was known that we need to consider the results during in-service program development.

• Journal of Engineering Education Research
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• v.11 no.3
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• pp.24-32
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• 2008

Engineering Colleges in Korea have two educational objectives: 1) strengthening of speciality 2) cultivation of the engineering literacy such as the ability of working together, the ability of communication and creative thinking. In order to achieving these objectives, Engineering Literacy education was originated. The improvable proposal of general education course of engineering college is divided into two parts. One is American type that emphasizes on the general education independently of major. The other is Korean ABEEK's type that attach importance to engineering literacy. This study researches the case of Seoul National University that applied ABEEK's engineering literacy on redesigning the curriculum. To redesign the curriculum, college of engineering, Seoul National University reduced the optional courses in general education and had the students complete the engineering literacy. This device is effective, because it is able to keep the universal general education and make the most of major's characteristics.

• Journal of Practical Engineering Education
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• v.16 no.2
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• pp.195-202
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• 2024

This study explored the effect of job experience while attending engineering colleges on entry into the labor market. To this end, the relationship between work experience and first job success among the job preparation behaviors of engineering majors and students with other majors was compared. Next, we analyzed the effects of work experience such as internships experienced by engineering students on adjusting to their first job after graduation and maintaining their employment. In particular, by analyzing the relative influence of factors affecting engineering students' entry into the job market, what kind of policy efforts can be made at the university level for the success of engineering students' employment is presented. The results showed that work experience affects the quality of employment of engineering, and it had a positive effect on all engineering students regardless of gender.

• Journal of the Korean Society of Safety
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• v.21 no.3 s.75
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• pp.1-7
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• 2006

Nowadays, out of other transmission parts, the sleeve is getting more and more important part for exact and smooth shifting from gear ratio change whenever drivers are needed. To exact and smooth shifting when drivers are needed, all the parts connected with gear shifting should be machined exactly and having dimensions designers are intended. Especially, in case of the sleeve that the most important functional part to shift from gear ratio change that drivers are intended, it needs high precision grade and quality in both sides runout and outer dia runout as well as inner spline small dia & large dia. Because it's assembled with the synchro hub spline and shifted directly with the mating cone. So, it should be applied the hear treatment(hereinafter referred to H.T.M.T) to prevent the friction and percussion loss from shifting with mating cone. At this time, the deformation problems are raised from almost H.T.M.T. process and it makes the inferior part.

• Journal of the Korean Society for Library and Information Science
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• v.28
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• pp.109-133
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• 1995

This study assessed citation analysis results in light of their usefulness for national scientific and technical information (STI) policy formulation and review in Korea. using electrical and electronics engineering field as a case. After brief summary of citation analysis results was presented. current Korean STI policy was reviewed. which aims at establishing national STI sharing system by constructing many STI databases and information networks. Citation analysis results were discussed in light of their significance for Korean databases and information network construction and for use of informal networks such as E-Mail and invisible colleges. The problem of access to current information was also reviewed. Some recommendations were made to policy makers. which include creation of a centralized national STI center: development of guidelines for effective utilization of STI networks and STI; and. standardization of information processing technology and support for the automation of information centers and libraries. Based on the literature review. the best possible way of presenting recommendations to policy makers was examined. It was concluded that citation analysis could be a useful methodology for STI policy formulation and review when reliability and validity of the study is assured and the samples well represent the population of scientists and engineers. Finally recommendations for further research were offered.

• Journal of Practical Engineering Education
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• v.8 no.2
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• pp.95-101
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• 2016

In this paper, we introduce an implementation method of switch-based LED (Light Emitting Diode) Art logic circuits to help understanding the operation principle of digital logic circuits. Digital logic circuit practice using bread board is widely practiced in colleges or high schools in South Korea. However, actual digital logic circuit practice lacks examples of basic implementation, and as results of this problem, study with more complicated examples disturbs understanding the basic operation principle of digital logic circuits. Therefore, we proposed and tested an implementation method of switch-based LED Art logic circuits to help understanding the necessity of digital logic circuits which control signals of multiple output devices simultaneously.

• Journal of Engineering Education Research
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• v.26 no.3
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• pp.49-59
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• 2023

On July 6, 2021, the Ministry of Education revised and announced the operating regulations of the undergraduate co-op with the aim of protecting students rights and student-centered operation based on mutual benefits for students and institutions. Therefore, the purpose of this study is to analyze universities' perceptions against the amendment of regulation of the Ministry of Education's into universities/college, regions. According to a survey of 75 KACE, we found that colleges are more difficult than universities in terms of administrative work, company participation, reduced opportunities for co-op, and managing participating companies. Next, most of the regional differences in difficulties were not significant, and only the decline in company participation rate was more difficult in Daegyoung/Gangwon/Chungcheong/Jeju than in the metropolitan area. Finally, policy directions such as the differential application of practical support expenses according to the size of the company, tax benefits for institutions, and clarification of the concept of job training were presented.