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PENINGKATAN KOMPETENSI MEKANIK BENGKEL SEPEDA MOTOR MELALUI PELATIHAN DAN SERTIFIKASI KENDARAAN LISTRIK DI SURAKARTA Onery Andy Saputra; Sudiro; Arif Surono; Nita Enjellina; Arifin Oktabrian
DEVELOPMENT: Journal of Community Engagement Vol. 4 No. 3 (2025): September
Publisher : LPPM STAI Muhammadiyah Probolinggo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46773/djce.v4i3.2579

Abstract

The development of electric vehicles in Indonesia requires the readiness of mechanics with specialized competencies in maintenance and repair. However, most motorcycle workshop mechanics in the Soloraya region still have limited knowledge and skills. This community service program aims to enhance the competence of mechanics through electric vehicle training and certification. The program was conducted at the Automotive Workshop of Politeknik Indonusa Surakarta in collaboration with Wuling Motor Indonesia, involving 20 participants from various motorcycle workshops. The training materials covered electric motor systems, batteries, battery management systems (BMS), and high-voltage occupational safety. The implementation methods included theoretical delivery, interactive discussions, and hands-on practice in electric vehicle maintenance and repair. The results indicated improved participants’ understanding, as shown by pre-test and post-test evaluations, and further reinforced by the awarding of competency certificates. This activity not only provided direct benefits for workshop mechanics but also supported the acceleration of battery-based electric vehicle implementation in line with government programs. Through this training, mechanics are expected to adapt to the development of automotive technology, enhance the competitiveness of local workshops, and contribute to sustainable transportation development in Indonesia.
Effect of Power Percentage and Cutting Speed on Tensile Stress Values in Laser Cutting Processes saputra, onery; Nurharyanto , Anwar; Sudiro
Jurnal INOVATOR Vol. 6 No. 2 (2023): Jurnal INOVATOR
Publisher : LPPM Politeknik Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37338/inovator.v6i2.261

Abstract

This research was conducted to determine the tensile stress of an object that was cut using a laser cutting machine. The purpose of this study is to determine the strength changes in the workpiece caused by cutting using laser cutting based on power and cutting speed. The workpiece used in this study is a polymer type Polymethylmethacrylate (PMMA) or better known as acrylic. This study uses variations in the amount of power and cutting speed, namely 50% power with a cutting speed of 5 mms, 50% power with a cutting speed of 10mms, 70% power with a cutting speed of 5 mms and 70% power with a cutting speed of 10 mms. From the results of tensile stress testing, the amount of power and speed of acrylic cutting affects the tensile stress of the workpiece. The greater the acrylic cutting power will reduce the tensile stress value of the workpiece by 11.4%. The faster the acrylic cutting will reduce the tensile stress value by 10.7%.
THE EFFECET OF STRESS AND PRODUCTIVITY DUE TO TRAFFIC CONGESTION AMONG WORKERS IN KUALA LUMPUR Syafiq D.R, IIyas; Buqhari, Ahmas; Andy, Onery
Proceeding of the International Conference Health, Science And Technology (ICOHETECH) 2023: Proceeding of the 4th International Conference Health, Science And Technology (ICOHETECH)
Publisher : LPPM Universitas Duta Bangsa Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47701/icohetech.v4i1.3367

Abstract

Stress at work’ is a concept which there are lots of potential causes of stress in a working environment that can affect the productivity of a worker. Traffic congestion is a condition in transport that is characterised by slower speeds, longer trip times, and increased vehicular queueing. The experience of workers during traffic congestion before attending work could induce stress towards them, hence being assessed in this study. This study aims to assess the relationship between traffic congestion and work productivity. This study was conducted among a total sample of 133 individual workers in Kuala Lumpur which are prone to road traffic congestion in city areas. Raw data were collected in an online standardized survey. Data analysis was done using Microsoft Excel and SPSS using multiple hypotheses testing formula including ANOVA test, Linear Regression Analysis and Correlation Analysis. The findings of this study concluded that the data from all of the tests show consistent results which there is significant relationship between Stress at Work (p-value <0.05) and Road Traffic Congestion (p-value <0.05), but Work Productivity (p-value >0.05) shows insignificance towards the two variables. Therefore, it can be concluded that road traffic congestion causes stress to workers in Kuala Lumpur, but the stress induced from road traffic congestion does not hinder their productivity at work.
THE ASSOCIATION OF THE LEVEL OF DISCOMFORT AND WORKSTATION DESIGN AMONG DESK JOB WORERS IN THE TELECOMMUNICATION INDUSTRY Syafiq D.R, Ilyas; Hajar N.Z, Siti; Andy, Onery
Proceeding of the International Conference Health, Science And Technology (ICOHETECH) 2023: Proceeding of the 4th International Conference Health, Science And Technology (ICOHETECH)
Publisher : LPPM Universitas Duta Bangsa Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47701/icohetech.v4i1.3377

Abstract

Musculoskeletal Disorders (MSDs) are a prevalent condition that affects computer users with poor posture. Office workers are affected because they utilize computers to enter data, write letters, send emails, organize meetings, and communicate with coworkers and clients. Workers in the services sector use computers, phones, work documents, and stationery to communicate with consumers. To assess the level of discomfort for WRMSDs among desk job workers and the association with workstation design. 108 people took the online CMDQ, and 27 were chosen to assess the ROSA based on their scores. Upper back (13.9%), lower back (12.0%), and hip/buttocks (10.2%) reported the most discomfort. 26 (96.3%) participants were high-risk for ROSA and 3.7% were low risk. The result of the association showed that there was no association between the level of discomfort and workstation design. Each body part showed to have a p-value>0.05 associated with workstation design. Those with desk jobs in the telecommunication industry reported feeling the most discomfort in their upper back, lower back, and hip/buttock. The result of grand ROSA showed participants having a high risk of ROSA which required a further assessment. However, there was no significant association between the level of discomfort and workstation design. The finding of ROSA does not relate directly to the bad equipment in the workplace reported by the workers but rather to the improvement of worker’s posture, optimizing its use and findings can support the result of this study.
EFFECT OF SUV BODY GEOMETRY ON AERODYNAMIC DRAG AND FUEL EFFICIENCY USING CFD Arifin Oktobrian Winanta; Dewandono Bayu Seto; Onery Andi Saputra
Scientific Journal of Mechanical Engineering Kinematika Vol 11 No 1 (2026): SJME Kinematika June 2026
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v11i1.856

Abstract

The increasing demand for fuel efficiency in the automotive industry, particularly in the sport utility vehicle (SUV) segment, has intensified research on factors influencing vehicle energy efficiency. One of the most important factors is vehicle aerodynamic performance, especially air resistance characterized by the drag coefficient. This study analyzes the influence of SUV body shape variations on aerodynamic performance and fuel consumption using Computational Fluid Dynamics (CFD) simulations. Two SUV models with different body geometries, namely boxy and streamlined configurations, were analyzed under identical operating conditions to ensure a consistent comparison. The simulation results show that the streamlined model reduces the drag coefficient from 0.46 to 0.325, corresponding to an approximate 29% reduction compared to the boxy configuration. This aerodynamic improvement is associated with better fuel efficiency, particularly at higher vehicle speeds. At a speed of 120 km/h, the streamlined configuration achieves a fuel efficiency of 13.2 km/L, while the boxy configuration reaches only 9.03 km/L under the same conditions. These findings indicate that optimizing vehicle body geometry through aerodynamic design can significantly improve fuel efficiency and reduce aerodynamic resistance in SUV vehicles.
Implementasi Nanofluid Silika–Etilena Glikol (SiO₂–C₂H₆O₂) pada Sistem Pendingin Mesin Mobil: Implementasi Nanofluid Silika–Etilena Glikol (SiO₂–C₂H₆O₂) pada Sistem Pendingin Mesin Mobil ARIF SURONO SURONO; Onery Andy Saputra; Ataula Zalifuna Ramadhan
JURNAL ILMIAH MOMENTUM Vol 20 No 2 (2024): Vol 20, No 2
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v20i2.12791

Abstract

Perkembangan nanoteknologi telah banyak dikembangkan untuk meningkatkan system pendingin radiator kendaraan. Eksperimen nanofluida dari air, SiO2-C2H6O2 hasilnya dibandingkan dengan penelitian lain pada mesin kendaraan.  Penelitian ini bertujuan untuk mengevaluasi pengaruh laju aliran fluida terhadap efektivitas kinerja radiator dengan menggunakan nanofluida yang terdiri dari campuran air dengan nano silika SiO2-C2H6O2 Penelitian diawali melalui pengujian bahan silika secara marfologi menggunakan SEM untuk mengetahui struktur mikro. Selanjutnya mencampur nano partikel silika SiO2- C2H6O2) 0,5 gram dengan air, di proses menggunakan magnetic stirer selama 8 jam dan di endapkan selama 24 jam. Setelah terpisah dengan endapan, nanofluida tersebut di uji kinerja menggunakan rangkaian alat uji yang terdiri dari radiator, flowmeter, pompa air, instalasi pipa, heater dan tangki reservoir. Pengambilan data dilakukan pada suhu masuk dan keluar untuk mengtahui penurunan suhu. Variasi kecepatan aliran fluida sebesar 1.8, 3, dan 6 LPM. Hasil penelitian menunjukkan bahwa  penurunan suhu terbaik antara media air murni dan penambahan nano partikel SiO2-C2H6O2 dengan variasi laju aliran fluida yaitu pada media penamban nano partikel SiO2-C2H6O2 dengan rata – rata penurunan suhu sebesar 0,292 oC. Sedangkan untuk media ari murni rata – rata penurunan suhu sebesar 0.208 oC.Dari hasil pengujian yang dilakukan penambahan nano partikel SiO2-C2H6O2 mampu membuang panas ke lingkungan lebih baik di bandingkan dengan air murni.
Effect of Power Percentage and Cutting Speed on Tensile Stress Values in Laser Cutting Processes saputra, onery; Nurharyanto , Anwar; Sudiro
Jurnal INOVATOR Vol. 6 No. 2 (2023): Jurnal INOVATOR
Publisher : LPPM Politeknik Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37338/inovator.v6i2.261

Abstract

This research was conducted to determine the tensile stress of an object that was cut using a laser cutting machine. The purpose of this study is to determine the strength changes in the workpiece caused by cutting using laser cutting based on power and cutting speed. The workpiece used in this study is a polymer type Polymethylmethacrylate (PMMA) or better known as acrylic. This study uses variations in the amount of power and cutting speed, namely 50% power with a cutting speed of 5 mms, 50% power with a cutting speed of 10mms, 70% power with a cutting speed of 5 mms and 70% power with a cutting speed of 10 mms. From the results of tensile stress testing, the amount of power and speed of acrylic cutting affects the tensile stress of the workpiece. The greater the acrylic cutting power will reduce the tensile stress value of the workpiece by 11.4%. The faster the acrylic cutting will reduce the tensile stress value by 10.7%.
Sustainable Waste Management Assessment of Small–Medium Motorcycle Workshops Onery Saputra; Muhammad Fajar Sodiq; Ilyas Syafiq DR
Jurnal E-Komtek Vol 10 No 1 (2026)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v10i1.3061

Abstract

The growth of small-to-medium-sized motorcycle repair shops in Soloraya has increased the amount of waste that has the potential to pollute the environment if not managed properly. This study analyzes the characteristics of repair shops, the types and amounts of waste, management practices, and the potential economic value from a sustainability perspective. The study was conducted at ten repair shops (n = 10) through observation, structured interviews, and surveys. In one month, the ten workshops produced 1,214 used oil bottles, 337 liters of used oil, and 20 used batteries, as well as non-hazardous waste in the form of metal components and brake pads. The dominance of used bottles and oil reflects the high level of routine maintenance. Management is still limited to temporary storage and delivery to third parties with substandard facilities. Waste has economic value: oil at Rp1,500/liter, batteries and metal at Rp12,000/kg, indicating both environmental risks and circular economic opportunities.
Rancang Bangun Alat Pirolisis Tabung Bertingkat Pengolah Sampah Plastik menjadi BBM Alternatif (PITARA) Arif Surono; Wachid Yahya; Onery Andy Saputra; Muhammad Iwan
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 3 (2026): RESWARA: Jurnal Riset Ilmu Teknik, July 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i3.618

Abstract

Plastic waste is difficult to decompose and continues to create environmental pressure, while the need for alternative liquid fuels remains high. This study aimed to design and test PITARA, a multi-stage tube pyrolysis prototype for converting mixed plastic waste into liquid fuel. The method used an experimental engineering design through functional analysis, structural design, fabrication, functional testing, performance testing, and preliminary fuel-property testing. The unit consisted of a 10 kg stainless-steel reactor, a dual-fuel burner using LPG and charcoal, and a vertical double-pipe condenser. The feedstock consisted of mixed PP, PE, HDPE, and similar plastics processed into 2 x 3 mm pellets. From 10 kg of clean and dry plastic waste, the prototype produced 10.35 L of liquid condensate, equivalent to 8.221 kg or 82.21% by mass, about 2 g of solid residue, and an estimated 17.77% gaseous or non-condensable fraction by difference. Laboratory testing showed a density of 0.7944 g/cm³, viscosity of 0.257 cP, calorific value of 37.37 MJ/kg, and positive flammability. The novelty of this study lies in the integration of a dual-fuel burner, compact stainless-steel reactor, and vertical double-pipe condenser for small-scale mixed-plastic pyrolysis. The findings represent preliminary prototype validation; further GC-MS analysis, fuel-standard testing, emission testing, and engine performance evaluation are required.
Karakterisasi Produk Pirolisis Limbah Plastik Polystyrene (PS) Menggunakan Reaktor Tabung Bertingkat ”Pitara” Sebagai Bahan Bakar Alternatif: Bahan Bakar Hasil Pirolisis Sampah Plastik Jenis Polystyrene (PS) Ilham Mudin; Onery Andy Saputra; Arif Surono
Creative Research in Engineering (CERIE) Vol. 6 No. 2 (2026): Creative Research in Engineering (CERIE)
Publisher : Lembaga Publikasi Ilmiah dan Penerbitan (LPIP)

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

Abstract

Abstrak Permasalahan sampah plastik, khususnya Polystyrene (PS), menjadi isu lingkungan yang signifikan akibat sifatnya yang sulit terurai. Penelitian ini bertujuan untuk menginvestigasi limbah plastik jenis Polystyrene menggunakan reaktor tabung bertingkat ”PITARA” menjadi bahan bakar alternatif cair menggunakan metode pirolisis dengan variasi suhu 250oC, 300°C dan 350°C, diikuti dengan proses pemurnian menggunakan adsorben bentonite. Metode yang digunakan pada penelitian ini adalah eksperimen laboratorium dengan tahapan persiapan bahan, pirolisis pada kondisi anaerob, dan pengujian kualitas fisikokimia produk cair menggunakan metode standar ASTM. Hasil penelitian menunjukkan bahwa pirolisis Polystyrene menghasilkan rendemen (yield) minyak yang sangat tinggi yakni sebesar 78,26%, 21,3% berupa sisa residu padat serta gaz sebesar 0,44%. Penggunaan 25 gram adsorben bentonite pada setiap liter nya secara post-treatment terbukti efektif meningkatkan kualitas minyak pirolisis, yang ditandai dengan perubahan warna menjadi coklat jernih dan peningkatan sifat fisikokimia. Hasil pengujian laboratorium menunjukkan nilai viskositas kinematik pada 40°C sebesar 0.795 pada suhu pemanasan 250°C, 0,874 mm²/s pada suhu pemanasan 300°C mm²/s dan 0.939 mm²/s pada suhu pemanasan 350°C, dimana telah memenuhi spesifikasi standar bensin komersial (0,4–1,5 mm²/s). Untuk flash point adalah 25,0°C pada suhu pemanasan 250°C, 32,0°C pada suhu pemanasan 300°C dan 32,3°C pada suhu pemanasan 350°C. Meskipun nilai densitas dan specific gravity masih sedikit di atas ambang batas standar, nilai flash point menunjukkan stabilitas termal yang baik dan aspek keamanan yang lebih tinggi selama penyimpanan dibandingkan bensin konvensional. Secara keseluruhan, minyak pirolisis Polystyrene hasil adsorpsi bentonite memiliki potensi yang menjanjikan sebagai bahan bakar alternatif atau blending component bagi kendaraan bermotor.