Vol. 57 No. 6 (2025): December 2025 (In Progress)

DOI: https://doi.org/10.5614/j.eng.technol.sci.2025.57.6
Published: 2025-10-28

Articles

  • The Effect of Ignition Timing on Combustion of Ammonia/Ethanol Mixtures in Spark-Assisted Compression Ignition Engine with a Sub-chamber

    DOI : 10.5614/j.eng.technol.sci.2025.57.6.1
    Takanobu Okada (1), Mitsuhisa Ichiyanagi (2), Emir Yilmaz (3), Takashi Suzuki (4), Hikaru Shiraishi (5), Eric Le Roy Ngwompe Souop (6), Evan Widjaja (7), Jason Sutedjo (8), Christian Dennis Marcelo (9), Ferdinand Ronaldo Tjiotijono (10), Gabriel Jeremy Gotama (11), Willyanto Anggono (12)
    (1) Postgraduate School of Science and Technology, Sophia University, Tokyo 102-8554, Japan ,
    (2) Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, , Japan ,
    (3) Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, , Japan ,
    (4) Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, , Japan ,
    (5) Department of Engineering and Applied Sciences, Faculty of Science and Technology, Sophia University, Tokyo 102-8554, , Japan ,
    (6) Graduate School of Science and Technology, Sophia University, Tokyo 102-8554, Japan ,
    (7) Mechanical Engineering Department, Petra Christian University, Surabaya 60236, Indonesia ,
    (8) Mechanical Engineering Department, Petra Christian University, Surabaya 60236, Indonesia ,
    (9) Mechanical Engineering Department, Petra Christian University, Surabaya 60236, Indonesia ,
    (10) Graduate School of Science and Technology, Sophia University, Tokyo 102-8554, Japan ,
    (11) Centre for Sustainable Energy Studies, Petra Christian University, Surabaya 60236, , Indonesia ,
    (12) Mechanical Engineering Department, Petra Christian University, Surabaya 60236, Indonesia
    735-746
    Abstract : 122
    PDF : 27
    DOI: https://doi.org/10.5614/j.eng.technol.sci.2025.57.6.1

  • Developing Carbon Nanofibers from Gnetum Gnemon Linn Pericarp Using Dual Activators KOH And Melamine as Innovative Electrode Materials for Supercapacitors

    DOI : 10.5614/j.eng.technol.sci.2025.57.6.2
    Rakhmawati Farma (1), Hardini Chania Putri (2), Irma Apriyani (3), Luqyana Adha Azwat (4), Awitdrus Awitdrus (5), Mohamad Deraman (6), Ari Sulistyo Rini (7), Rahmondia Nanda Setiadi (8), Erman Taer (9)
    (1) Department of Physics, University of Riau, Kampus Bina Widya, Km. 12,5 Simpang Baru Pekanbaru, 28293, Riau, Indonesia ,
    (2) Department of Physics, University of Riau, Kampus Bina Widya, Km. 12,5 Simpang Baru Pekanbaru, 28293, Riau, Indonesia ,
    (3) Department of Physics, University of Riau, Kampus Bina Widya, Km. 12,5 Simpang Baru Pekanbaru, 28293, Riau, Indonesia ,
    (4) Department of Physics, Universitas Indonesia, Kampus UI Depok, Margonda Raya, Kampus Baru, Depok 16424, Indonesia ,
    (5) Department of Physics, University of Riau, Kampus Bina Widya, Km. 12,5 Simpang Baru Pekanbaru, 28293, Riau, Indonesia ,
    (6) School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, , Malaysia ,
    (7) Department of Physics, University of Riau, Kampus Bina Widya, Km. 12,5 Simpang Baru Pekanbaru, 28293, Riau, Indonesia ,
    (8) Department of Physics, University of Riau, Kampus Bina Widya, Km. 12,5 Simpang Baru Pekanbaru, 28293, Riau, Indonesia ,
    (9) Department of Physics, University of Riau, Kampus Bina Widya, Km. 12,5 Simpang Baru Pekanbaru, 28293, Riau, , Indonesia
    747-759
    Abstract : 90
    PDF : 27
    DOI: https://doi.org/10.5614/j.eng.technol.sci.2025.57.6.2

  • Crashworthy Structure Analysis of Indonesia's First High-speed Train Trailer Made from Aluminum Extrusion

    DOI : 10.5614/j.eng.technol.sci.2025.57.6.3
    Achmad Syaifudin (1), Khakim Muh Luqman (2)
    (1) Laboratory of Solid Mechanics, Department of Mechanical Engineering, Institut Teknologi Sepuluh Nopember (ITS), Jalan Teknik Industri, Keputih, Kec. Sukolilo, Surabaya, Jawa Timur 60111, , Indonesia ,
    (2) Departement of Engineering Solution, PT Sanggar Sarana Baja, Jalan Cilandak KKO No. 1 Jakarta 12560, Indonesia
    760-775
    Abstract : 130
    PDF : 60
    DOI: https://doi.org/10.5614/j.eng.technol.sci.2025.57.6.3

  • Influences of Groove Geometries on Bend Radius and Springback in V-Bending

    DOI : 10.5614/j.eng.technol.sci.2025.57.6.4
    Quoc-Nguyen Banh (1), Viet-Khai Le (2), Anh-Chuong Le (3), Anh-Son Tran (4), Minh-Tuan Ho (5)
    (1) Department of Manufacturing Engineering, Faculty of Mechanical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, Dien Hong Ward, Ho Chi Minh City, , Viet Nam ,
    (2) Department of Manufacturing Engineering, Faculty of Mechanical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, Dien Hong Ward, Ho Chi Minh City, , Viet Nam ,
    (3) Department of Manufacturing Engineering, Faculty of Mechanical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, Dien Hong Ward, Ho Chi Minh City, , Viet Nam ,
    (4) Department of Manufacturing Engineering, Faculty of Mechanical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, Dien Hong Ward, Ho Chi Minh City, , Viet Nam ,
    (5) Department of Manufacturing Engineering, Faculty of Mechanical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, Dien Hong Ward, Ho Chi Minh City, , Viet Nam
    776-790
    Abstract : 83
    PDF : 27
    DOI: https://doi.org/10.5614/j.eng.technol.sci.2025.57.6.4