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All Journal JPSE (Journal of Physical Science and Engineering) Emerging Science Journal Civil Engineering Journal JMM (Jurnal Masyarakat Mandiri) Mekanika: Majalah Ilmiah Mekanika Automotive Experiences Research in Education, Technology, and Multiculture
Aditya Rio Prabowo
Universitas Sebelas Maret
Aerospace Engineering Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics Other

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PENDAMPINGAN SISWA MADRASAH DALAM KOMPETISI UNMANNED SURFACE VEHICLE MEMPERSIAPKAN LULUSAN KOMPETITIF ERA DIGITAL Aditya Rio Prabowo; Fahri Setyo Utomo; Iwan Istanto; Rahman Wijaya; Hammam Satria Musyarraf; Prihantoro Eko Sulistyo
JMM (Jurnal Masyarakat Mandiri) Vol 9, No 6 (2025): Desember
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v9i6.34802

Abstract

Abstrak: Program pengabdian ini dilatarbelakangi oleh keterbatasan fasilitas laboratorium robotika dan minimnya pengalaman guru serta siswa MAN 1 Surakarta dalam bidang otomasi dan pemrograman, yang berdampak pada rendahnya keterampilan praktis berbasis teknologi. Tujuan kegiatan adalah meningkatkan kompetensi teknologi guru dan siswa melalui pendampingan kompetisi Unmanned Surface Vehicle (USV). Metode pelaksanaan meliputi sosialisasi, pelatihan desain CAD, workshop manufaktur, praktik sistem mekanik dan elektronis, serta uji coba sea trial dengan melibatkan 2 guru pendamping dan 8 siswa terbaik. Evaluasi dilakukan melalui observasi, angket dalam 15 pertanyaan pre-test dan post-tes, dan wawancara untuk menentukan minat pembagain kelas. Hasil kegiatan menunjukkan peningkatan signifikan keterampilan siswa, antara lain penguasaan desain CAD dari 25% menjadi 80%, pembuatan prototipe dari 30% menjadi 89%, serta problem solving dari 32% menjadi 87%. Softskill seperti kerja sama tim, kepercayaan diri, dan jiwa kompetisi juga meningkat di atas 85%. Program ini berhasil melahirkan prestasi di tingkat nasional sekaligus memperkuat budaya inovasi di madrasah.Abstract: This community service program was motivated by the limited robotics laboratory facilities and the lack of experience of teachers and students at MAN 1 Surakarta in the fields of automation and programming, which resulted in low technology-based practical skills. The objective of the activity was to improve the technological competence of teachers and students through mentoring in the Unmanned Surface Vehicle (USV) competition. The implementation method included socialization, CAD design training, manufacturing workshops, mechanical and electronic system practices, and sea trial trials involving two mentor teachers and eight top students. Evaluation was carried out through observation, a 15-question pre-test and post-test questionnaire, and interviews to determine class division interests. The results of the activity showed a significant increase in student skills, including mastery of CAD design from 25% to 80%, prototyping from 30% to 89%, and problem solving from 32% to 87%. Soft skills such as teamwork, self-confidence, and a competitive spirit also increased above 85%. This program succeeded in producing achievements at the national level while strengthening the culture of innovation in madrasas.
Tool Rotation Speed and Joint Configuration Effects on ODFSW Extruded Aluminum Panel Properties Ericha D. W. S. Putri; Yoga Syahbani Indra Wijaya; Yohanes P. D. S. Depari; Nurul Muhayat; Aditya Rio Prabowo; Triyono
Civil Engineering Journal Vol. 12 No. 8 (2026): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-08-07

Abstract

This study aims to investigate the influence of tool rotational speed and joint configuration on the physical and mechanical properties of extruded AA6061-T6 aluminum panels joined by One-Step Double-Acting Friction Stir Welding (ODFSW), a technique that joins both panel faces simultaneously in a single pass. While previous ODFSW studies have focused exclusively on the effect of tool rotational speed in plate or hollow panel geometries using a single joint type, the comparative influence of joint configuration on ODFSW joint quality and mechanical performance has not been systematically addressed in the existing literature. Panels were welded in butt and lap configurations at tool rotational speeds of 1200, 1500, and 1800 rpm, and evaluated through macrostructural observation, microstructural analysis, Vickers microhardness testing, tensile load testing (ASTM A370), and bending testing (ISO 5173). Results showed that increasing rotational speed improved material flow, reduced surface defects, and promoted dynamic recrystallization in the stir zone, yielding a characteristic W-shaped hardness profile with minimum values in the heat-affected zone. Butt joints consistently outperformed lap joints, achieving maximum tensile load capacity of 25.3 kN and bending strength of 10.8 MPa at 1800 rpm, compared to 18.5 kN and 6.3 MPa for lap joints. Fracture occurred in open mode for butt joints and shear mode for lap joints. This work provides the first systematic comparison of butt and lap configurations under identical ODFSW parameters for extruded panels, offering new guidance for optimizing joint design in lightweight civil and structural engineering applications.
Hydrodynamic Response Analysis of a Multi-Moonpool Floating Structure Using the Boundary Element Method Muhammad Taufiq Nur Hidayat; Aditya Rio Prabowo; Ristiyanto Adiputra; Mahfud Alfajar; Oleksiy Melynk; Martin Jurkovic
Research in Education, Technology, and Multiculture Vol 5, No 3 (2026): Research in Education, Technology, and Multiculture
Publisher : Institute of Multidisciplinary Research and Community Service

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61436/rietm/v5i3.pp293-303

Abstract

This study aims to evaluate the hydrodynamic response of a displacement-type hull integrated with a multi-moonpool system (one main and sequential cylindrical moonpools) using the Boundary Element Method (BEM), addressing the critical challenge of piston-mode resonance that causes excessive heave motion. The analysis used ANSYS AQWA based on linearized potential-flow theory, assuming infinite water depth and head-sea conditions. Grid independence tests were conducted at resolutions ranging from 5.0 m to 0.7 m, and the resulting Heave RAO curve was benchmarked against a reference dataset. A significant amplitude deviation was found in the high-frequency zone (piston-mode resonance), where the BEM solver overpredicted the heave RAO by 68.77% relative to the reference curve, while both curves showed near-perfect asymptotic alignment in the macro-wave regime. BEM is reliable for predicting motion response in the macro-wave regime, but future hydrodynamic optimization of moonpool structures requires integrating viscous damping modifiers to realistically capture resonance amplitude peaks. Keywords: Boundary element method, Floating structure, Hydrodynamics, Moonpool, Piston mode resonance.
Co-Authors . Triyono Ari Prasetyo Arjon Turnip Bhre Wangsa Lenggana Cahyo Hadi Wibowo D. D. Dwi Pria Tjahjana Danardono Dwi Prija Tjahjana, Dominicus Dany Taufiq Alim Ansori Dian Majid Didik Djoko Susilo Dimas Wahyu Utomo Dody Ariawan Dong Myung Bae Eko Prasetya Budiana Eko Surojo Endra Joelianto Ericha D. W. S. Putri Ericha Dwi Wahyu Syah Putri Fahmi Imanullah Fahri Setyo Utomo Fahri Setyo Utomo Fajar Budi Laksono Fajar Budi Laksono Fitrian Imaduddin Hammam Satria Musyarraf Hammar Ilham Akbar Hananta Diatmaja Hanif Setya Hanandita Haris Nubli Hermes Carvalho Hermes Carvalho Iwan Istanto Iwan Istanto Kuswardi, Yemi Mahfud Alfajar Mahfud Alfajar Martin Jurkovic Muhammad Al Kholif Muhammad Nurfajriansyah Muslich Muhammad Taufiq Nur Hidayat Muhayat, Nurul Nurul Huda Nurul Muhayat Nurwijayanti Oleksiy Melynk Prihantoro Eko Sulistyo R. Ridwan Rahman Wijaya Rahman Wijaya Ristiyanto Adiputra Ristiyanto Adiputra Rumi Iqbal Doewes, Rumi Iqbal Seung Jun Baek Sudarno Sudarno Sugito Sunardi Sunardi Svitlana Onyshchenko T. Tuswan Teguh Muttaqie Teguh Muttaqie Teguh Triyono Tohid Ghanbari-Ghazijahani Triyono Ubaidillah Ubaidillah Ubaidillah Wibowo Wibowo Yoga Syahbani Indra Wijaya Yohanes P. D. S. Depari Yohanes P. D. S. Depari