Garuda - Garba Rujukan Digital

3D Model Autocad Of The Piston Displacer Cup For A Gamma Stirling Engine Using The API Method Rahmat, Rahmat; Dean Anggara Putra; Rifo Nurlaksana Restu; Jefri Imron; Marhaendra Natawibawa; Hery Sumardiyanto; Khairil Munawar; Thomas Junaedi
Elkom: Jurnal Elektronika dan Komputer Vol. 18 No. 1 (2025): Juli : Jurnal Elektronika dan Komputer
Publisher : STEKOM PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/129bk828

When producing a perfect product, design process namely 2D modeling and 3D drawing, are closely related. The purpose of this study is to design a 3D model of a gun mastering machine product as a fan drive using CAD applications. The method of this study is decision data on API production (analytical product inspection). Measurement of sterling machine degradation using CPK (deviation) received results of -0.97, -0.22, 0.86, 0.11, 0.11 between zero and what indicates this specification. On average, the results of the stirling fluid fluorescent agent measurement are red numbers indicating that the survey dimensions are absent, especially from the basic dimensions of point 4, with samples 2, 3, and 5 exceeding the specified tolerance limits.

Project control using S Curve in provision of pedestal crane at PT. Medco E&P Natuna - West Belut Platform Rahmat, Rahmat; Putra, Dean Anggara; Restu, Rifo Nurlaksana; Imron, Jefri; Natawibawa, Marhaendra; Sumardiyanto, Hery; Munawar, Khairil; Junaedi, Thomas
Priviet Social Sciences Journal Vol. 5 No. 8 (2025): August 2025
Publisher : Privietlab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55942/pssj.v5i8.489

In the implementation of a project, three main aspects are indicators of the success of the project: cost, schedule, and quality. If the cost and time of project implementation are in accordance with the planning and quality requirements, then the project can be said to be successful. Time plays a significant role in construction management projects, where time is also a management function. With good and proper time control, obstacles to delays in project implementation can be avoided as much as possible. The purpose of this study was to determine the cause of the achievement or deviation of work between the realization in the field and the planned time schedule for the procurement of a pedestal crane unit for a new platform in the operational area of block-B-Natuna.

Rancang Bangun Mesin Penggulung Lilitan Kawat Transformator Otomatis Berbasis Arduino Uno Dean Anggara Putra; Rahmat Rahmat; Rifo Nurlaksana Restu; Jefri Imron; Marhaendra Natawibawa; Hery Sumardiyanto
Jurnal Manajemen Informatika & Teknologi Vol. 5 No. 1 (2025): Mei : Jurnal Manajemen Informatika & Teknologi
Publisher : LPPM Sekolah Tinggi Ilmu Ekonomi - Studi Ekonomi Modern

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/zwj24c08

Transformator merupakan komponen penting dalam sistem kelistrikan, namun proses pembuatan transformator secara manual masih memiliki keterbatasan dari sisi efisiensi dan akurasi jumlah lilitan. Penelitian ini merancang dan membangun mesin penggulung lilitan kawat transformator otomatis berbasis Arduino Uno dengan kontrol motor stepper melalui driver L298N, serta antarmuka LCD 16x2 untuk menampilkan jumlah lilitan. Sistem ini dilengkapi push button sebagai penentu jumlah lilitan dan potensiometer untuk mengatur kecepatan putaran motor. Hasil pengujian menunjukkan bahwa mesin ini mampu bekerja dengan tingkat presisi tinggi, dengan selisih jumlah lilitan hanya 1–3 lilitan pada setiap pengulangan dan perbedaan kecepatan motor stepper sebesar 2–3 RPM. Dengan demikian, mesin ini dapat meningkatkan efisiensi produksi transformator serta mengurangi potensi kesalahan manual. Penelitian selanjutnya disarankan untuk menambahkan mekanisme penggerak kawat otomatis agar distribusi lilitan lebih merata.

Application of Particle Swarm Optimization Method in Fleet Transportation Systems of Two-Wheeled Automotive Industry Sumardiyanto, Hery; Rahmat Rahmat; Dean Anggara Putra; Rifo Nur Laksana; Jefri Imron; Marhanedra Natawibawa
Jurnal Manajemen Informatika & Teknologi Vol. 5 No. 1 (2025): Mei : Jurnal Manajemen Informatika & Teknologi
Publisher : LPPM Sekolah Tinggi Ilmu Ekonomi - Studi Ekonomi Modern

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/2p3y6939

One of the activities in the supply chain system in the motorcycle industry is the process of sending components or spare parts from vendors to motorcycle assembly plants. Delivery of spare parts using the respective vendor's fleet. Along with the increase in market demand, demand for components from vendors has also increased. This has an impact on increasing the number and frequency of fleets entering the factory area; besides that, there is also an increase in transportation costs from Vendors. This study aims to improve efficiency in the number, frequency, and cost of fleet transportation by using the VRP (Vehicle Routing Problem) approach. To get optimal results, the PSO (Particle Swarm Optimization) method was used by utilizing the MATLAB 2020 software. This research involved 40 vendors, logistics partners, and motorcycle assembly factories. The results of this study showed better results, namely, before the research was carried out, the number of fleets was 40 units, and the delivery frequency was 40 times, with a total shipping cost of IDR 2,769,330. Meanwhile, after conducting research using the PSO optimization method, it was obtained that the number of delivery frequency fleets was 8 times with a total shipping cost of IDR 2,679,113.

Mitigasi Karbon Melalui Pemanfaatan Sampah Plastik Menjadi Paving Blok Plastik: Pendekatan Ekonomi Sirkular untuk Pembangunan Berkelanjutan Laksana, Rifo Nur Laksana Restu; Rahmat Rahmat; Dean Anggara Putra; Jefri Imron; Marhaendra Natawibawa; Hery Sumardiyanto
Jurnal Manajemen Informatika & Teknologi Vol. 5 No. 1 (2025): Mei : Jurnal Manajemen Informatika & Teknologi
Publisher : LPPM Sekolah Tinggi Ilmu Ekonomi - Studi Ekonomi Modern

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/s5djt007

Global climate change driven by greenhouse gas (GHG) emissions, particularly carbon dioxide (CO₂), has become the greatest challenge of this century. At the same time, the accumulation of plastic waste has emerged as a massive environmental crisis. This paper examines the potential utilization of plastic waste into paving blocks as a carbon mitigation strategy and a waste management solution. This approach not only reduces the volume of plastic waste in the environment but also has the potential to lower the carbon footprint of conventional construction material production and contribute to the circular economy. The analysis involves a comparison of the carbon footprint between plastic-based and conventional paving blocks, as well as an estimation of the carbon mitigation potential at various scales of implementation. The findings indicate that material substitution and the incorporation of plastic into durable products offer significant contributions to emission reduction and foster sustainable development.

Optimasi Desain Bottom Screen dan Sterilizer Pabrik Kelapa Sawit PT. XYZ Hery Sumardiyanto; Rahmat Rahmat; Sulaiman Sulaiman
Journal of Innovative and Creativity Vol. 5 No. 2 (2025)
Publisher : Fakultas Ilmu Pendidikan Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joecy.v5i2.3448

The bottom screen is the part responsible for removing ripe fresh fruit bunches (FFB) from the sterilizer. This role is crucial in ensuring the smooth flow of ripe fruit out of the sterilizer without any obstacles. If the bottom screen is disturbed, the flow of fruit out will be hindered, which ultimately reduces the sterilizer's capacity. A deformed or blocked bottom screen can inhibit the release of ripe FFB. Therefore, a deeper identification of the problem is needed to design the right solution to increase the capacity and effectiveness of the sterilizer. If the bottom screen is disturbed, the flow of fruit out will be hindered, which ultimately reduces the sterilizer's capacity. Therefore, regular repair and maintenance of the bottom screen are crucial to ensure that the sterilizer process runs smoothly and production capacity remains optimal. it can be concluded that the two main problems that have the greatest impact are the blockage of FFB out due to deformation of the bottom screen (41%) and thinning of the sterilizer wall (24%), which cumulatively. fixing these two problems is a top priority in efforts to increase sterilizer capacity.

Project control using S Curve in provision of pedestal crane at PT. Medco E&P Natuna - West Belut Platform Rahmat Rahmat; Dean Anggara Putra; Rifo Nurlaksana Restu; Jefri Imron; Marhaendra Natawibawa; Hery Sumardiyanto; Khairil Munawar; Thomas Junaedi
Priviet Social Sciences Journal Vol. 5 No. 8 (2025): August 2025
Publisher : Privietlab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55942/pssj.v5i8.489

In the implementation of a project, three main aspects are indicators of the success of the project: cost, schedule, and quality. If the cost and time of project implementation are in accordance with the planning and quality requirements, then the project can be said to be successful. Time plays a significant role in construction management projects, where time is also a management function. With good and proper time control, obstacles to delays in project implementation can be avoided as much as possible. The purpose of this study was to determine the cause of the achievement or deviation of work between the realization in the field and the planned time schedule for the procurement of a pedestal crane unit for a new platform in the operational area of block-B-Natuna.

Parameter Optimization of Battery Energy Storage System Considering Degradation Using Reinforcement Learning Muhammad Dzaky Ashidqi; Silviana Windasari; Rahmat Rahmat; Probokusumo Probokusumo
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 15 No 1: Februari 2026
Publisher : This journal is published by the Department of Electrical and Information Engineering, Faculty of Engineering, Universitas Gadjah Mada.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jnteti.v15i1.24882

Accurate and sustainable operation of battery energy storage systems (BESS) is critical for supporting renewable energy integration, ensuring both short-term reliability and long-term asset preservation. This study proposed a reinforcement learning (RL)-based scheduling framework designed to minimize power mismatch while mitigating degradation in lithium-ion batteries. The framework dynamically adapted to fluctuations in photovoltaic generation and residential load, enabling real-time decision-making. The performance was evaluated over a 30-day horizon using three indicators: average power mismatch, cumulative capacity loss, and system stability index (SSI). Results demonstrated that the proposed method achieved near-perfect load balance with an average mismatch of only 0.002 kW, while cumulative degradation remained limited to 0.22% and SSI was maintained at 0.96, reflecting high operational stability. The estimated daily degradation rate of 0.0073% corresponded to an annual capacity loss of approximately 2.7%, significantly lower than the 5–6% typically observed in uncontrolled cycling scenarios. Comparative analysis with simulated annealing (SA) and multi-objective genetic algorithm (MOGA) highlighted the balanced performance of the RL method. While MOGA eliminated mismatch at the expense of excessive degradation (0.60%) and simulated annealing reduced degradation but suffers from high mismatch (0.012 kW), the RL framework delivered the most balanced trade-off across all metrics. These findings confirm the potential of RL as a practical and sustainable strategy for PV–BESS integration, providing both technical resilience and extended battery lifetime.

Analysis of the Effect of Damdex Addition to Concrete Mixture on Compressive Strength Endah Murtiana Sari; Probokusumo; Alfiya Rokhmah; Muhamad Dzaky Ashidqi; Rahmat; Thomas Junaedi
Engineering Science Letter Vol. 4 No. 03 (2025): Engineering Science Letter
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/IISTR.esl.001420

This study aims to determine the compressive strength and modulus of elasticity of concrete with the addition of Damdex variables to obtain the best composition. This research method is classified as quantitative research conducted at PT. Fresh Beton Indonesia Batching Plan BSD. In this study, research was conducted using two different concrete mixtures, namely 1 Pc: 2 S: 3 Gr and 1 Pc: 3 S: 2 Gr, each of which was supplemented with Damdex at concentrations of 0.0%, 0.2%, 0.4%, and 0.6%. According to the study's results, the highest compressive strength and modulus of elasticity were achieved in a concrete mixture of 1 Pc: 2 S: 3 Gr, with a variable addition of Damdex at 0.2%, resulting in a compressive strength of Fc 15.11 MPa and a modulus of elasticity of 18975.061 MPa. Meanwhile, the lowest compressive strength and modulus of elasticity results were obtained in the concrete mixture of 1 Pc: 2 S: 3 Gr with the variable addition of Damdex 0.6%, with a compressive strength of Fc 12.90 MPa and a modulus of elasticity of 17049.89 MPa. In the concrete mixture of 1 Pc: 3 S: 2 Gr, the compressive strength and modulus of elasticity were smaller compared to the concrete mixture of 1 Pc: 2 S: 3 Gr, with the highest results in the variable addition of Damdex 0.2%, with a compressive strength of Fc 9.89 MPa and a modulus of elasticity of 13846.477 MPa. Compressive strength and elastic modulus were measured at 28 days in accordance with SNI 1974:1990/2847 procedures. Among the tested mixtures, the 0.20% Damdex addition achieved the highest average compressive strength and elastic modulus. Within the tested conditions, 0.20% Damdex provided the best average performance; however, further work with larger samples and additional durability metrics is needed to confirm this trend.

Title

Found 9 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 9 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 9 Documents
Search