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All Journal Jurnal Pendidikan Vokasi ACADEMIA: Jurnal Inovasi Riset Akademik Jurnal Suara Pengabdian 45 Jurnal Pemberdayaan Masyarakat JGK (Jurnal Guru Kita) Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan Mars: Jurnal Teknik Mesin, Industri, Elektro dan Ilmu Komputer Panggung Kebaikan : Jurnal Pengabdian Sosial Advance Sustainable Science, Engineering and Technology (ASSET) Jurnal Pendidikan Teknik Mesin
Cahyanto, Septian Eko
Program Studi Pendidikan Teknik Mesin, Fakultas Teknik, Universitas Negeri Semarang, Jalan Kolonel H. R. Hadijanto, Semarang, Jawa Tengah 50229, Indonesia
Agriculture, Biological Sciences & Forestry Arts Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Physics Social Sciences Other

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Effect of Biomass Feedstock Granulometry on Thermophysical Characteristics of Charcoal Briquettes via Screw Extrusion Samsudin Anis; Jefri Bale; Septian Eko Cahyanto; Ninda Kurniadi; Deni Fajar Fitriyana; M. Thooriq Anwar; Januar Parlaungan Siregar; Natalino Fonseca Da Silva Guterres
Advance Sustainable Science Engineering and Technology Vol. 7 No. 4 (2025): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i4.2047

Abstract

The present study investigates the impact of particle size variation (10, 18, 20, and 35 mesh) on the physical and thermal properties of charcoal briquettes from coconut shells manufactured with a screw-based extruder machine. The briquette manufacturing process involves crushing, mixing, molding, and drying. Assessments were conducted to ascertain friability, compressive strength, density, calorific value, volatile matter, ash content, fixed carbon, and water content. Comparable assessments were also performed on commercially available export-grade briquettes designated as b_5. The results of this investigation demonstrate that all briquette samples generated conform to the SNI 01-6235-2000 standard for water, ash, and calorific value, and adhere to international standards for fixed carbon, density, and compressive strength. The b_4 specimen (35 mesh) demonstrated the best performance, exhibiting a friability of 0% in the unburned condition and 7.04% in the burned condition. Compared to b_5, the b_4 specimen exhibited notable enhancement, demonstrating a 100% increase in friability in the unburned condition and a 53.22% improvement in the burned condition. This study emphasizes the significance of smaller particle sizes in improving briquettes' mechanical strength and combustion efficiency. It presents the importance of renewable energy technology and sustainable waste management.
Pengembangan Media Pembelajaran Flipbook Materi Alat Ukur Dasar-dasar Teknik Mesin Ananda Tri Bintang Nugroho; Khoirul Huda; Kriswanto Kriswanto; Septian Eko Cahyanto; Kaleb Priyanto
Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan Vol. 5 No. 3 (2025): July
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/panthera.v5i3.566

Abstract

Learning in the Measuring Instruments subject in Vocational High Schools (SMK) is still dominated by traditional methods, such as lectures and the use of printed textbooks. This results in low student engagement and difficulty in understanding technical material in a practical manner. This study aims to develop and evaluate interactive flipbook-based learning media to improve student understanding of the Measuring Instruments material in the Basics of Mechanical Engineering subject. The development model used is the 4D model (Define, Design, Develop, and Disseminate), involving a validation process by material and media experts, as well as a limited trial with 40 students. The validation results showed that the material aspect achieved a feasibility score of 91.32%, while the media and design aspects achieved 94.31%. Meanwhile, student responses to the media showed an average score of 82.29%, which is categorized as very valid. This flipbook media integrates text, images, and attractive visual design, thus facilitating student understanding in a more concrete and enjoyable way.
Biomechanical Evaluation of Implant Angulation on the First Mandibular Premolar: A 3D Finite Element Study Andrean Rachman Rizaldy; Kriswanto; Septian Eko Cahyanto; Rahmat Doni Widodo; J. Jamari; Athanasius Priharyoto Bayuseno
Jurnal Pendidikan Teknik Mesin Vol. 26 No. 01 (2026): June 2026 "Special issues for finite element analysis"
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v26i01.29780

Abstract

The design and orientation of dental implant connections play a critical role in biomechanical success, particularly in the posterior mandibular region, which is subjected to high occlusal loads. This study aims to evaluate the effect of varying abutment angulations (0°, 15°, and 25°) on stress distribution, strain, and safety factor in a reverse-buttress implant system using the Finite Element Analysis (FEA) approach. A 3D implant model was simulated within an idealized bone block using ANSYS software, applying a physiological static load of 240 N. The results showed that increasing abutment angulation significantly elevated both maximum stress and strain, particularly in the screw component, which experienced a peak stress of 455.89 MPa at 15°. The safety factor, calculated based on the yield strength of titanium grade 5 (880 MPa), decreased from 14.18 (0° abutment) to 2.94 (25° abutment). Although all configurations remained within safe limits (>1.5), the axial (0°) configuration demonstrated the most stable load distribution and the highest safety margin. This study underscores the importance of considering abutment angulation in implant planning and supports the use of safety factor–based FEA as a predictive tool for assessing implant structural safety.
Co-Authors Ainun Athar, Muhammad Ananda Tri Bintang Nugroho Andrean Rachman Rizaldy Andri Setiyawan Arya Bima Satrya Yudha Athanasius Priharyoto Bayuseno Enita, Sarai Fitriyana, Deni Fajar Galih TriLaksono Gojandra, Farda Pega Libra Haikal Haikal J. Jamari Januar Parlaungan Siregar Jefri Semuel Bale Kaleb Priyanto Khoirul Huda Khoirul Huda Khoirul Huda Kriswanto Kriswanto Kriswanto Kriswanto Kriswanto Kriswanto Kriswanto Kriswanto Kriswanto Kriswanto, Kriswanto M. Thooriq Anwar Muhammad Khumaedi Natalino Fonseca Da Silva Guterres Ninda Kurniadi Priyanto, Kaleb Putra, Fajar Waskhita Rahmawati, Adinuringtyas Herfi Ridho Fajar Irsandi Riki Febrianto Ruben Bayu Kristiawan Samsudin Anis Saputra, Dimas Chandra Sarai Enita Setyo Bhahak Fendi Baihaqi Sudji Munadi TriLaksono, Galih Wibowo, Andika Agus Tri Wirawan Sumbodo