• 제목/요약/키워드: Mechanical Engineering

검색결과 43,157건 처리시간 0.058초

4차 산업혁명 시대 기계공학 분야 엔지니어에게 필요한 역량과 교육에 관한 델파이 연구 (A Delphi Study on Competencies of Mechanical Engineer and Education in the era of the Fourth Industrial Revolution)

  • 강소연;조형희
    • 공학교육연구
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    • 제23권3호
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    • pp.49-58
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    • 2020

  • In the era of the fourth industrial revolution, the world is undergoing rapid social change. The purpose of this study is to predict the expected changes and necessary competencies and desired curriculum and teaching methods in the field of mechanical engineering in the near future. The research method was a Delphi study. It was conducted three times with 20 mechanical engineering experts. The results of the study are as follows: In the field of mechanical engineering, it will be increased the situational awareness by the use of measurement sensors, development of computer applications, flexibility and optimization by user's needs and mechanical equipment, and demand for robots equipped with AI. The mechanical engineer's career perspectives will be positive, but if it is stable, it will be a crisis. Therefore active response is needed. The competencies required in the field of mechanical engineering include collaborative skills, complex problem solving skills, self-directed learning skills, problem finding skills, creativity, communication skills, convergent thinking skills, and system engineering skills. The undergraduate curriculum to achieve above competencies includes four major dynamics, basic science, programming coding education, convergence education, data processing education, and cyber physical system education. Preferred mechanical engineering teaching methods include project-based learning, hands-on education, problem-based learning, team-based collaborative learning, experiment-based education, and software-assisted education. The mechanical engineering community and the government should be concerned about the education for mechanical engineers with the necessary competencies in the era of the 4th Industrial Revolution, which will make global competitiveness in the mechanical engineering fields.

  • https://doi.org/10.18108/jeer.2020.23.3.49 인용 PDF KSCI

삼차원 프린트된 몰드와 액체 금속을 이용한 웨어러블 힘 센서 개발 (Wearable Force Sensor Using 3D-printed Mold and Liquid Metal)

  • 김규영;최중락;정용록;김민성;김승환;박인규
    • 센서학회지
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    • 제28권3호
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    • pp.198-204
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    • 2019

  • In this study, we propose a wearable force sensor using 3D printed mold and liquid metal. Liquid metal, such as Galinstan, is one of the promising functional materials in stretchable electronics known for its intrinsic mechanical and electronic properties. The proposed soft force sensor measures the external force by the resistance change caused by the cross-sectional area change. Fused deposition modeling-based 3D printing is a simple and cost-effective fabrication of resilient elastomers using liquid metal. Using a 3D printed microchannel mold, 3D multichannel Galinstan microchannels were fabricated with a serpentine structure for signal stability because it is important to maintain the sensitivity of the sensor even in various mechanical deformations. We performed various electro-mechanical tests for performance characterization and verified the signal stability while stretching and bending. The proposed sensor exhibited good signal stability under 100% longitudinal strain, and the resistance change ranged within 5% of the initial value. We attached the proposed sensor on the finger joint and evaluated the signal change during various finger movements and the application of external forces.

  • https://doi.org/10.5369/JSST.2019.28.3.198 인용 PDF KSCI HTML

Effect of oxygen distribution for hot spot and carbon deposition minimization in a methane autothermal reforming reactor

  • Lee, Shin-Ku;Bae, Joong-Myeon;Kim, Yong-Min;Park, Joong-Uen;Lim, Sung-Kwang
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2008년도 추계학술대회B
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    • pp.1996-2000
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    • 2008

  • In autothermal reforming reaction, oxygen to carbon ratio (OCR) and steam to carbon ratio (SCR) are significant factors, which control temperature and carbon deposition into the reactor. The OCR is more sensitive than the SCR to affect the temperature distribution and reforming efficiency. In conventional operation, hydrocarbon fuel, steam, and oxygen was homogeneously mixed and injected into the reactor in order to get hydrogen-rich gas. The temperature was abruptly raised due to fast oxidation reaction in the former part of the reactor. Deactivation of packed catalysts can be accelerated there. In the present study, therefore, the effect of the oxygen distribution is introduced and investigated to suppress the carbon deposition and to maintain the reactor in the mild operating temperature (e.g., $700{\sim}800^{\circ}C$). In order to investigate the effect numerically, the following models are adopted; heterogeneous reaction model and two-medium model for heat balance.

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ABET Assessment of a Mechanical Engineering Program through Senior Capstone Design Courses at University of the Pacific

  • Lee, Chi-Wook;Watson, Kyle;Weick, Brian
    • 공학교육연구
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    • 제13권3호
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    • pp.18-33
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    • 2010

  • This paper describes two capstone senior design courses for the Mechanical Engineering program at University of the Pacific. The first course taught in the Fall semester is entitled "Engineering Design/Senior Project I." The second course taught in the Spring semester is entitled "Engineering Design/Senior Project II." All Mechanical Engineering students with senior standing are required to take these two classes in this sequence. At the end of every Spring semester, industrial advisors are invited to assess the final senior projects during an annual Senior Project Day. This assessment is performed using the Program Outcomes and Program Educational Objectives established for Pacific's Mechanical Engineering program. Since all Mechanical Engineering students are required to complete senior projects, this is a 100% evaluation process. After the evaluations are done, the data sets are compiled and reviewed by the faculty for assessment purposes. It is important to note that the industrial advisors perform the evaluations, but the faculty members assess the information to determine if modifications need to be made to the program or courses. In addition to the senior project evaluations, general feedback from Mechanical Engineering Industrial Advisory Committee (MEIAC) members is also useful for the outcomes-based assessment process in addition to the definition and evaluation of Program Outcomes and Program Educational Objectives.

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