Article Per Year (5 Year)
p-Index From 2021 - 2026
2.696
P-Index
This Author published in this journals
All Journal Jurnal Rekayasa dan Manajemen Sistem Industri Rekayasa Mesin Journal of Engineering and Management in Industrial System PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Community Empowerment International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Mechanical Engineering for Society and Industry Automotive Experiences
Willy Satrio Nugroho
Universitas Brawijaya
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Transportation

Published : 19 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 19 Documents
Search

 1   2 
Optimalisasi Proses Pengelasan di Bengkel Sumber Rejeki Malang dengan Teknologi Gas Tungsten Arc Welding: Optimization of the Welding Process at Sumber Rejeki Workshop Malang using Gas Tungsten Arc Welding Technology Sudarman, Sudarman; Sabariman, Rizky Wahyu; Buludatu, Riski; Muzaky, Muhammad Azriel; Alam, Adi Bahrul; Setiawan, Hendra Agus; Nugroho, Willy Satrio; Sofi'i, Yepy Komaril
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 10 No. 5 (2025): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v10i5.9295

Abstract

Sumber Rejeki Welding Workshop is one of the small and medium enterprises engaged in manufacturing and welding services in Malang City. In its production process, the workshop still relies on conventional welding methods that are less efficient and produce suboptimal weld quality. Therefore, this community service program aims to enhance production efficiency and quality by implementing Gas Tungsten Arc Welding technology and assisting in applying occupational health and safety standards. The implementation method of this program includes several stages: the preparation stage, which involves identifying partner needs and machine installation; the training stage, consisting of theoretical and practical sessions for operators; the production assistance stage; and the evaluation stage, using the Non-Destructive Testing method with penetrant testing techniques to assess weld quality. The results of this program implementation indicate a 30% improvement in production efficiency, with reduced processing time and fewer welding defects. Significant economic impacts are also evident through increased production capacity and the workshop's competitiveness in the local market. Furthermore, the provided training has enhanced the operators' skills in machine operation and raised their awareness of the importance of occupational safety standards. This program demonstrates that adopting modern welding technology can significantly improve productivity and product quality, making it a potential model for application in other small and medium enterprises to boost competitiveness in the manufacturing sector.
OPTIMIZATION OF FLEET UTILIZATION AND WAITING TIME IN SUPPLY CHAIN AGENT-BASED SIMULATION USING REINFORCEMENT LEARNING Tama, Ishardita Pambudi; Sujarwo, Sujarwo; Hardiningtyas, Dewi; Nugroho, Willy Satrio; Salsabila, Dhia Naqqiya
JEMIS (Journal of Engineering & Management in Industrial System) Vol. 12 No. 1 (2024)
Publisher : Industrial Engineering Department, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

Inventory to transport transition was a critical operation that requires high efficiency in manufacturing. This study models the inventory transition of manufacturing plants in a supply chain network. The objective was to configure the minimum fleet utilization with fastest waiting time.  The configuration was performed using reinforcement learning assisted agent-based model (ABM) simulation. The ABM with fleet speed control have the best performance with average waiting time of 5.84 hours with lowest fleet utilization which surpasses other models. Lower fleet and waiting time provide rest periods for the driver. Therefore, performing speed control during transport improves human factor of the supply chain operation.
PENINGKATAN PRODUKSI BAHAN BAKAR HIDROGEN DENGAN BANTUAN NATURAL SURFACTANT PADA PROSES WATER SPLIT Purnami, Purnami; Dewi, Fransisca Gayuh Utami; Wardana, ING; Sasongko, Mega Nur; Yusuf, M Umar; Nugroho, Willy Satrio
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1413

Abstract

Hydrogen is an alternative fuel due to its environmental friendliness and abundance. Hydrogen can be produced through water-splitting technique, in which the Oxygen (O2) and Hydrogen (H2) are separated. Water electrolysis is one of many causes of water-splitting that effectively results H2 with high purity. One drawback of electrolysis is the low efficiency. In this study, a rice straw natural surfactant was utilized to improve the efficiency. Rice straw with the volume of 5 ml, 10 ml, dan 15 ml were added to the electrolyte solution. This study shows the rice straw based natural surfactant contains hydrophilic and hydrophobic sides. Both sides capable to reduce the surface tension of the solution which destabilizes water molecules. The aromatic magnetic field of rice straw surfactant homogenizes the water net dipole moment due to the diamagnetism of water. These contributes towards the weakened hydrogen bond of the water in the solution. The synergy between hydrophobic and hydrophilic sides is potent to alter hydrogen production rate through intrinsic magnetism.
THE IMPACT OF CHAOTIC FLUX REFLECTION FIELD ON HYDROGEN EVOLUTION REACTION OF WATER ELECTROLYSIS Nugroho, Willy Satrio; Esiliy , Rehab Ragay; Purnami, Purnami; Sofi'i, Yepy Komaril
International Journal of Mechanical Engineering Technologies and Applications Vol. 5 No. 1 (2024)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2024.005.01.2

Abstract

Water electrolysis promises the capability to produce green hydrogen in the future. The efficiency and hydrogen evolution reaction rate (HER) of water electrolysis can be improved through magnetic field assisted electrolysis. External magnetic field exposure improves hydrogen production without requiring complex catalyst synthesis technique. The purpose of this study is to introduce chaos into a magnetic field assisted electrolysis system which disturbs the water molecules stability. The chaos effect was triggered by irregular flux reflection technique. The flux reflection was generated using diamagnetic tourmaline stones which sticked all over the electrolyzer wall. Consequently, the rotational speed of DMF does not reduce the effectiveness of chaotic flux. As a result, the hydrogen bond of the water molecules is destabilized irregularly. In conjuction with that, the bonds are unable to be reformed which make the water molecules continuously in movement. The critical effect of chaotic flux is the shear force that experienced by water molecules. The paramagnetic OH- ion movement is also slowed down so that H+ ion and electrons interaction were occurred in less restrictive manner. Hence, the chaotic magnetic field able to improve HER.  The chaotic flux reflection improves hydrogen production in magnetic field assisted water electrolysis through water properties and ion transfer mechanism modification.
THERMAL SIMULATION OF THE CZOCHRALSKI PROCESS FOR SILICON CRYSTAL GROWTH USING FINITE ELEMENT MODELING APPROACH Nugroho, Willy Satrio; Alamsyah, Fikrul Akbar; Chanampa, Carlos Nicolas Quispe
International Journal of Mechanical Engineering Technologies and Applications Vol. 5 No. 2 (2024)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2024.005.02.8

Abstract

This study investigates the thermal dynamics of the Czochralski (CZ) process for silicon crystal growth through numerical simulations. The simulation method of this study is based on finite element method (FEM) heat transfer simulation. The FEM simulation was performed using triangular mesh in half cross section of CZ system with real material properties. The analysis of heat transfer mechanisms includes conduction, convection, and radiation which reflect the impact of cooled argon convection on crystal growth. The simulations reveal that convection currents driven by cooled argon has a crucial role to promote uniform cooling which control crystal growth. This leads to enhanced mono-crystalline silicon ingot crystal quality and purity. Ultimately, insights gained from this study can inform optimization efforts in semiconductor manufacturing, facilitating advancements in electronic device fabrication.
The analysis of semiconducting charateristic of rice husk-based carbon nanomaterial bio-activated by pineapple peel juice Ni Made Dwidiani; Ngakan Putu Gede Suardana; I Nyoman Gede Wardana; Willy Satrio Nugroho; I Gusti Ketut Puja; Wayan Nata Septiadi; I Gusti Ngurah Nitya Santhiarsa; Si Putu Gede Gunawan Tista
Mechanical Engineering for Society and Industry Vol 5 No 1 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.12733

Abstract

This study investigates the synthesis and characterization of semiconducting materials derived from rice husk bio-activated by pineapple peel juice, presenting an eco-friendly and sustainable approach. The organic photo-active semiconducting material from rice husk ash (RHA) is synthesized. RHA was activated by immersion in the pineapple juice solution. Distinct structural disparities among RHA, Sunken Carbon nanomaterial (SCNM), and Floating Carbon Nanomaterial (FCNM) materials are revealed through SEM imaging, showcasing the tailored nature of each material. The SEM images also indicate the role of bromelain from the pineapple juice to provide defects on the RHA carbon surface. The crack on the nano particles on the surface of SCNM and FCNM were formed due to the bromelain electrostatic interaction with the surface. Elemental analysis indicates a higher probability of CuO and Si presence in SCNM, suggesting its potential for semiconductor extraction. The Cu to Si ratio implies photoactivity, confirmed by UV-Vis characterization showing absorption peaks in the UV region. FTIR analysis highlights enhanced polar interactions in SCNM and FCNM, attributed to the activation process involving bromelain in pineapple juice. The photoelectric effect testing shows FCNM and SCNM generates more electrical current as exposed to light which. The current was generated due to the electron transport phenomenon of CuO and Si content triggered by photons. The study provides insights into the materials' molecular structures and potential applications in sensors, energy devices, and semiconductor-related technologies, leveraging the unique properties of bio-derived nanomaterials for practical implementation.
Probabilistic Performance Prediction of a Hydrogen-Converted SI Engine Using a Markov-Chain-Wiebe Framework Purnami; Willy Satrio Nugroho; Lilis Yuliati; Fikrul Akbar Alamsyah; Abdul Mudjib Sulaiman Wahid; I Nyoman Gede Wardana
Automotive Experiences Vol. 9 No. 1 (2026)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.15544

Abstract

This study employs a novel Markov-chain modeling framework to analyze the combustion-performance interaction in a hydrogen-fueled spark-ignition engine. The methodology integrates a Wiebe heat-release model within a Markov-chain state-transition framework, where each discrete engine state defines combustion parameters and probabilistic transitions capture cycle-to-cycle variability. Results demonstrate that engine behavior is dominantly governed by combustion phasing, with spark timing exerting primary control over torque, efficiency, and brake-specific fuel consumption (BSFC). Sensitivity analysis confirms spark timing produces the steepest performance gradients, while ignition voltage offers secondary benefits and engine speed exhibits minimal influence. The model reveals a highly nonlinear torque response to spark advance, characterized by a rapid rise culminating in a narrow maximum brake torque (MBT) plateau at 8°–10° BTDC, corresponding to a distinct BSFC minimum. Significant data scatter underscores the stochastic nature of hydrogen combustion, arising from multidomain interactions between air-fuel ratio, ignition strength, and phasing. The Markov-chain approach successfully captures this coupled deterministic-probabilistic behavior, highlighting the critical need for precise spark-timing control to optimize performance in hydrogen applications.
Flash joule heating synthesis of porous graphene oxide from banana leaf waste for high-performance supercapacitor electrodes Ikhwanul Qiram; Dewi Sartika; Wisnu Kuncoro; Willy Satrio Nugroho; Abdul Mudjib Sulaiman Wahid
Mechanical Engineering for Society and Industry Vol. 6 No. 1 (2026)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.14658

Abstract

This study investigates the synthesis of porous graphene oxide (GO) derived from banana leaf waste using the Flash Joule Heating (FJH) method for supercapacitor electrode applications. Carbonization was conducted at input voltages of 5, 10, and 15 VA for 2 s, followed by activation with 0.3 M KOH. Structural characterization (SEM, EDX, FTIR, and XRD) confirmed the formation of hierarchical porous carbon with oxygen-containing functional groups. Electrochemical evaluation revealed that the sample synthesized at 10 VA exhibited the best performance, achieving a specific capacitance of 345 F g⁻¹, low internal resistance of 0.65 Ω, and capacitance retention of 95% after 500 cycles. In contrast, the 5 VA sample showed lower conductivity due to its amorphous structure, while the 15 VA sample exhibited reduced capacitance due to excessive macropore formation. These results demonstrate that controlled FJH voltage plays a critical role in optimizing pore structure and electrochemical performance, highlighting banana leaf-derived GO as a promising and sustainable electrode material for high-performance supercapacitors.
The role of aromatic rings, heterocyclic rings, and hydroxyl groups in increasing hydrogen production using activated carbon-based photocatalysts Fitria Indra Septi; Willy Satrio Nugroho; Purnami; Dionysius Joseph Djoko Herry Santjojo; I Nyoman Gede Wardana
Mechanical Engineering for Society and Industry Vol. 6 No. 1 (2026)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.15190

Abstract

Hydrogen production using photocatalysis with activated carbon (AC) combined with curcumin and CTP has been investigated. Curcumin contains two aromatic rings and two ”“OH groups, while CTP contains two aromatic rings, one pyran heterocyclic ring, and six ”“OH groups at specific positions. However, the combined performance of these materials with AC has not been fully optimized, highlighting the need for further research to understand their chemical interactions in photocatalytic processes and their potential for renewable energy applications. This study aimed to determine the role of pyran heterocyclic rings and ”“OH groups in hydrogen production. The results showed that hydrogen production using pure AC was 115.75 μmol/g, while AC + curcumin and AC + CTP produced 1297.8 μmol/g and 1462.6 μmol/g, respectively. The higher hydrogen production in AC + CTP compared to AC + curcumin is attributed to the presence of pyran heterocyclic rings, which enhance photocatalyst stability and efficiency by reducing electron”“hole recombination and expanding the light absorption spectrum, thereby increasing hydrogen evolution. Although the stacking interactions and active sites in the form of ”“OH, C”“H, and C”“O groups in AC + CTP are fewer than in AC + curcumin, the presence of oxygen atoms in the pyran heterocyclic ring contributes to greater hydrogen production. This study contributes to the selection of effective photocatalyst materials based on compound composition to support clean and sustainable hydrogen energy as an alternative to fossil fuels.
Co-Authors Abdul Mudjib Sulaiman Wahid Alam, Adi Bahrul Ali Saifullah Anggara, Teuku Aril Reynaldi Buludatu, Riski Chanampa, Carlos Nicolas Quispe Dewi Hardiningtyas Dewi Sartika Dewi, Fransisca Gayuh Utami Dionysius Joseph Djoko Herry Santjojo Esiliy , Rehab Ragay Fikrul Akbar Alamsyah Fikrul Akbar Alamsyah Fitria Indra Septi Heni Hendaryati I Gusti Ketut Puja I Gusti Ngurah Nitya Santhiarsa I Nyoman Gede Wardana I Nyoman Gede Wardana Ikhwanul Qiram ING Wardana Ishardita Pambudi Tama Lilis Yuliati Mega Nur Sasongko Muhammad Sukroni Muzaky, Muhammad Azriel Ngakan Putu Gede Suardana Ni Made Dwidiani Purnami Purnami Purnami Purnomo Budi Santoso Rusnita Yuliana Sabariman, Rizky Wahyu Salsabila, Dhia Naqqiya Schulze, Ajani Aiman Schulze, Klauss Setiawan, Hendra Agus Si Putu Gede Gunawan Tista Sudarman Sudarman Sudarman Sudarman Sujarwo Sujarwo Wayan Nata Septiadi Wisnu Kuncoro Yepy Komaril Sofi’i Yusuf, M Umar