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Workshop Teknik Penulisan Karya Ilmiah Bagi Guru di SMA Negeri 1 Lubuk Dalam Edi Kurniawan; Meyci Trisna; Nina Hartati; Herlin Sumarna; Toni Okviyanto; Tri Satya Ramadhoni
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 2 No. 2: Mei 2023
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/joongki.v2i2.1639

Scientific work is a form of scientific publication used by teachers to support the Sustainable Professional Program (PKB) that has been launched by the government to actualize the work of teachers as professional staff. Many teachers do not understand how to make a good and correct scientific work, even though scientific work is a mandatory requirement for teachers for the promotion process. The implementation of community service activities aims to provide workshops on scientific writing techniques for teachers at SMA Negeri 1 Lubuk Dalam. The strategy used is through lecture, tutorial, and discussion methods and observation sheets to see the effectiveness of the methods used. The result of this dedication is that the teacher is able to understand the techniques of writing scientific papers well and correctly so that they are suitable for publication

Workshop Teknik Penulisan Karya Ilmiah Bagi Guru di SMA Negeri 1 Lubuk Dalam Edi Kurniawan; Meyci Trisna; Nina Hartati; Herlin Sumarna; Toni Okviyanto; Tri Satya Ramadhoni
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 2 No. 2: Mei 2023
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/joongki.v2i2.1639

Scientific work is a form of scientific publication used by teachers to support the Sustainable Professional Program (PKB) that has been launched by the government to actualize the work of teachers as professional staff. Many teachers do not understand how to make a good and correct scientific work, even though scientific work is a mandatory requirement for teachers for the promotion process. The implementation of community service activities aims to provide workshops on scientific writing techniques for teachers at SMA Negeri 1 Lubuk Dalam. The strategy used is through lecture, tutorial, and discussion methods and observation sheets to see the effectiveness of the methods used. The result of this dedication is that the teacher is able to understand the techniques of writing scientific papers well and correctly so that they are suitable for publication

Workshop Teknik Penulisan Karya Ilmiah Bagi Guru di SMA Negeri 1 Lubuk Dalam Edi Kurniawan; Meyci Trisna; Nina Hartati; Herlin Sumarna; Toni Okviyanto; Tri Satya Ramadhoni
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 2 No. 2: Mei 2023
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/joongki.v2i2.1639

Scientific work is a form of scientific publication used by teachers to support the Sustainable Professional Program (PKB) that has been launched by the government to actualize the work of teachers as professional staff. Many teachers do not understand how to make a good and correct scientific work, even though scientific work is a mandatory requirement for teachers for the promotion process. The implementation of community service activities aims to provide workshops on scientific writing techniques for teachers at SMA Negeri 1 Lubuk Dalam. The strategy used is through lecture, tutorial, and discussion methods and observation sheets to see the effectiveness of the methods used. The result of this dedication is that the teacher is able to understand the techniques of writing scientific papers well and correctly so that they are suitable for publication

Overhaul dan Uji Performansi Generator Firman FPG1510 RV1-C Hanni Maksum Ardi; Mokhamad Munir Fahmi; Nor Fajri; Yudistira Anugrahadi Wiraputra; Dibyo Setiawan; Toni Okviyanto
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 1 (2026): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v12i1.15186

Electrical energy is one of the essential needs for garment entrepreneurs in Cileungsi, Bogor Regency, West Java, to support their production activities. However, frequent power outages in the region often disrupt the production process. The Firman FPG1510 RV1-C generator set (genset) can serve as a solution to overcome these outages, but the unit was found to be inoperable after initial evaluation. An overhaul maintenance was performed after component-level servicing failed to restore stable operation. The results of the overhaul process were evaluated through performance testing, which included fuel consumption testing under a 570Watt electrical load and exhaust emission measurements. The performance test results show that the highest fuel consumption rate (ṁbb) was 0.000089 kg/s at 3177 RPM. At the same speed, the highest brake specific fuel consumption (BSFC) was recorded at 0.21456 kg/kWh. The maximum electrical efficiency (ηt) was achieved at 3006 RPM with a value of 17.35%, while the highest brake thermal efficiency (BTE) was 43.45% at 2973 RPM. The emission test after overhaul produced CO levels of 0.92–2.72% and HC levels of 80–153 ppm, both of which comply with the Bandung City emission standards for gasoline engines (CO 4.5% and HC 1200 ppm). A comparison between the post-overhaul performance and the manufacturer’s specifications shows that the indicator shaft power after overhaul reached 1.42 kW at 3006 RPM, compared to 1.17 kW at 3000 RPM in the standard specification. This indicates a 21% increase in shaft power as a result of the overhaul maintenance.

Optimasi Performa Mesin Diesel Matsumoto MDX-178F melalui Modifikasi Intake dan Exhaust Dibyo Setiawan; Rizal Jatnika; Derry Murtadho Muthohhary; Ilham Azmy; Toni Okviyanto; Cahyo Wibowo
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 12, No 1 (2026): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v12i1.14945

The current condition of the Matsumoto MDX-178F diesel engine for the Energy Efficient Car Competition (KMHE) is not at its maximum performance, the efficiency and torque it produces have decreased from the initial engine specifications. The purpose of this activity is to recondition and modify the air intake and exhaust system on the Matsumoto MDX-178F diesel engine to optimize engine performance, increase combustion efficiency, and reduce exhaust emissions. The reconditioning method begins with an evaluation of the air intake and exhaust system which includes components such as air ducts, filters, exhaust ducts, head parts, pistons, cylinders, injectors and other parts. Repairs or replacements are carried out on components that are damaged or require readjustment. The modification process is carried out by porting and polishing the intake and exhaust lines. The increase in air flow is measured using a flow bench, the increase in power is measured using a dynotest, the reduction in exhaust emissions is measured using an exhaust gas analyzer. This study provides a scientific contribution through the integrated application of reconditioning and geometric optimization of intake–exhaust channels based on porting and polishing in a single-cylinder diesel engine within the context of energy-efficient vehicles, an area that remains limited in previous research. The results of this reconditioning and modification can show a significant increase in engine performance, including increased power and combustion efficiency. so that the engine becomes more environmentally friendly. The conclusion shows that the reconditioning and modification of the intake and exhaust systems of the Matsumoto MDX-170F diesel engine not only improves engine performance, but also improves fuel economy and reduces environmental impact.

Kajian Eksperimental Keausan Knuckle Coupler Pada Sambungan Lokomotif Kereta Api Taufikurrahman Taufikurrahman; Zenika Rizki Putra; Yuli Asmara Triputra; Toni Okviyanto
TEKNIKA Vol. 20 No. 2 (2026): Teknika Mei 2026
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Keandalan knuckle coupler sebagai komponen kritis pada sistem perkeretaapian sangat dipengaruhi oleh ketahanan aus, ketangguhan impak, dan karakteristik mikrostrukturnya. Penelitian ini bertujuan untuk mengevaluasi kinerja material knuckle coupler berbasis baja AAR M-201 Grade E melalui pendekatan eksperimental yang terintegrasi. Metode yang digunakan meliputi uji impak Charpy (ASTM E23), uji keausan pin-on-disk (ASTM G99), serta pengamatan mikrostruktur menggunakan mikroskop optik (ASTM E3). Hasil pengujian menunjukkan nilai energi impak sebesar 93,63 J dan harga impak 0,786 J/mm², yang jauh melebihi standar minimum industri (20–27 J), meskipun mekanisme patah yang diamati bersifat getas. Uji keausan menghasilkan nilai keausan spesifik sebesar 0,000088207 mm³/kg·m, yang menunjukkan ketahanan aus sangat baik dengan mekanisme dominan berupa abrasi. Analisis mikrostruktur mengidentifikasi keberadaan fasa ferit dan pearlit dengan distribusi yang tidak sepenuhnya homogen serta adanya presipit karbida pada batas butir. Kondisi ini memberikan kontribusi terhadap peningkatan kekerasan dan ketahanan aus, namun juga berpotensi meningkatkan konsentrasi tegangan yang memicu patah getas. Secara keseluruhan, material masih memenuhi standar industri dan layak digunakan, namun diperlukan optimasi perlakuan panas untuk meningkatkan homogenitas mikrostruktur dan keandalan jangka panjang. Kata kunci—Knuckle coupler, AAR M-201 Grade E, keausan, impak, mikrostruktur

Pengaruh Beban Operasi terhadap Nilai Net Plant Heat Rate (NPHR) pada Pembangkit Listrik Tenaga Uap Herlin Sumarna; Tri Satya Ramadhoni; Gurruh Dwi Septano; Purfaji Purfaji; Toni Okviyanto
INSOLOGI: Jurnal Sains dan Teknologi Vol. 5 No. 2 (2026): April 2026
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v5i2.7977

This study aims to analyze the effect of variations in operating load on the Net Plant Heat Rate (NPHR) at a 3×10 MW coal-fired power plant. The independent variables examined are the generator operating loads at 50%, 75%, and 100%, while the dependent variable is the NPHR value. The research data consists of 30 samples distributed proportionally across each load level. Data analysis was performed using a one-way Analysis of Variance (ANOVA) to test the significance of differences in the mean NPHR values across the operating load variations. The results indicate that variations in operating load significantly affect the NPHR value (p-value < 0.05). The highest average NPHR value was obtained at 50% load at 4160 kcal/kWh, then decreased at 75% load to 3861 kcal/kWh, and reached the lowest value at 100% load at 3625 kcal/kWh. These results indicate that an increase in operating load correlates with a decrease in the NPHR value and an increase in the plant’s thermal efficiency. Thus, operating the coal-fired power plant under conditions approaching optimal design capacity can improve fuel efficiency and support the optimization of the plant’s operational performance.

Analisis Tegangan dan Kegagalan Yoke Propeller Shaft Truk Angkutan Sawit Menggunakan Metode Elemen Hingga Tri Satya Ramadhoni; Herlin Sumarna; Toni Okviyanto; Purfaji Purfaji; Rachmat Dwi Sampurno
INSOLOGI: Jurnal Sains dan Teknologi Vol. 5 No. 2 (2026): April 2026
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v5i2.8001

Failure of slip yoke components in palm oil transport vehicle transmission systems is generally caused by complex and cyclic dynamic loading. This study aims to analyze stress distribution and predict failure locations using a Metode Elemen Hingga (FEM)-based approach. A three-dimensional model was developed from actual geometry with controlled simplification using AISI 4140 material. Mesh convergence and quality evaluation were conducted to ensure numerical reliability. The results show that maximum stress increases with load, reaching 196.14 MPa, 294.38 MPa, 392,40 MPa, and 490.52 MPa for loads of 4, 6, 8, and 10 tons, respectively. At 10 tons, the stress exceeds the material yield strength (415 MPa), indicating plastic deformation. Stress concentration occurs at the critical section (C–C) due to geometric discontinuities and combined loading, consistent with observed failure locations. Comparison with analytical results shows less than 1% deviation, confirming model accuracy. This study demonstrates that FEM effectively predicts stress distribution and failure mechanisms, providing a basis for design optimization and maintenance strategies.

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