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Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi
Published by Universitas Pancasila
ISSN : 26551861     EISSN : 27162923     DOI : https://doi.org/10.35814
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering
Jurnal ini mempublikasikan artikel ilmiah berbasis penelitian, studi kasus, articles review, rekayasa dan inovasi yang mencakup teoritis maupun praktis serta pengembangannya. Topik artikel ilmiah yang dimuat ASIIMETRIK mencakup bidang Arsitektur, Teknik Sipil, Teknik Industri, Teknik Informatika, Teknik Mesin dan Teknik Elektro.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 411 Documents
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Revitalizing Sodetan Sekretaris River as a View for Centro City Residence and Its Surroundings Angela Subagio; Siwi Samsu Hendra
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 7 Number 2 (2025)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v7i2.8716

Abstract

Many apartments offer various advantages, one of which is the view. However, not the case with Centro City Residence apartment located on Jalan DaanMogot. Problems arise in the room units facing Kali Sodetan Sekretaris due to the poor ventilation and unpleasant views. Rather than providing fresh air, the window allows unpleasant odors from the river to enter the rooms. Moreover, the view consists of a heavily polluted river, filled with garbage and dark, murky water. This research, conducted using a descriptive qualitative method, aims to explore the role of architectural design in proposing alternative solutions that benefit both the residents of Centro City Residence and the surrounding. Some solutions that can be done are to revive Sodetan Sekretaris river as a tourist spot for the surrounding. By making it a tourist spot and is expected to be free from garbage. This includes transforming the riverfront into a clean, inviting space with pedestrian walkways, seating areas, photo spots, and street lighting to attract local visitors and encourage community engagement.
Chemical Grinding Aids as Chemical Agents to Enhance the Efficiency of Clinker Grinding in Cement Plants Akhwan Purwoko; Djoko Setyanto
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 7 Number 2 (2025)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v7i2.8763

Abstract

Chemical Grinding Aids, hereinafter referred to as Grinding Aids, are chemical additives used to optimize the grinding process of clinker and other supplementary materials into cement powder. In practice, these Grinding Aids enhance the efficiency of the grinding process, thereby increasing the capacity of the grinding equipment. As a result of this increased capacity, the electrical energy consumption per ton of cement produced is reduced, leading to a proportional decrease in production costs per ton. In addition to improving productivity, the use of Grinding Aids also contributes to better cement quality. Experimental data presented in this article show that the application of Grinding Aids has a positive impact, increasing production by up to 17% with an optimal dose of 350 ppm when using concentrated Grinding Aids without dilution. Meanwhile, the optimal dose for a Grinding Aid solution diluted in water at a ratio of 1:4 (grinding aids:water) is 300 ppm. This improvement in productivity also leads to a 5% reduction in electricity consumption during the cement grinding process.
Performance Analysis of Time Capacity and Coulomb Methods for SoC Estimation in VRLA Batteries Herlina; M. Rafli Leo; Sri Agustina; Wirawan Adi Pradana
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 7 Number 2 (2025)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v7i2.8774

Abstract

The climate crisis and limited energy availability in remote areas encourage the use of VRLA battery-based off-grid solar energy systems, where accurate state-of-charge (SoC) evaluation is essential for system efficiency. At middle SoC ranges, the VRLA voltage curve's flatness makes voltage-based methods less effective. This research investigates the efficacy of two practical methods, Time Capacity and Coulomb Counting, in estimating the SoC of 12V 10Ah VRLA batteries at varying discharge rates (C20 to C1) using a system that incorporates Arduino Uno and ACS712 sensors. The experimental findings show that Time Capacity is the best strategy, with an inaccuracy of 0-12%. Due to sensor error and temperature sensitivity, Coulomb Counting's error is 30-38.4%. Heatmap imaging proved Time Capacity's stability across all C-rates, making it suitable for remote monitoring. These findings lay the groundwork for reliable and cost-effective renewable energy systems and encourage further research on hybrid algorithms and environmental optimisation.
Different Quenching Media Effect on Microstructure, Hardness,and Corrosion of Medium Carbon Steel Syaripuddin; Sopiyan; Syamsuir; Tegar Firman Pamungkas; Ahmad Lubi; Ferry Budhi Susetyo
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 7 Number 2 (2025)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v7i2.8793

Abstract

Medium carbon steel is widely used due to could conduct heat treatment to modify the microstructure and mechanical properties. Quenching is one method to modify the microstructure and mechanical properties. In the present study conducted heating samples at 850°C using an electric furnace, then held them for 60 minutes and quenched in various media (saline water, oil, and distilled water). Afterward, the quenched sample was investigatedmicrostructure, hardness, and corrosion using an optical microscope, Vickers hardness tester, and weight loss method. 5% NaCl quenching media could result in samples more uniform and martensite due to the high cooling rate.More uniforms and martensite have the beneficial highest hardness and lowest corrosion rate for around 762.4 HV and 76.04 mpy.
Analysis of Sand Grain Characteristics and Permeability Using Hazen Formula and Laboratory Test Aniek Prihatiningsih; Wati Asriningsih Pranoto; Amelia Yuwono
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 7 Number 2 (2025)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v7i2.8871

Abstract

Permeability is a critical parameter in geotechnical and hydrological studies, representing a soil's capacity to transmit water through its pore spaces. The Hazen formula, an empirical method based on the D10 value from sieve analysis, is widely used to estimate the permeability coefficient. However, its accuracy is strongly influenced by grain shape and size distribution, which vary significantly across different geological settings such as volcanic, fluvial, and coastal environments. This study evaluates the applicability of the Hazen formula for sands derived from these three environments. The novelty of this research lies in its integrated approach, combining visual morphological analysis using sand grain imagery, particle size distribution tests, permeability estimation via the Hazen formula, and validation through constant head laboratory tests. Nine sand samples were analyzed: four from mountainous regions, two from rivers, and three from coastal areas. The findings reveal that sands with angular grains and wide gradation ranges exhibit considerable discrepancies between estimated and measured permeability values. Conversely, sands with rounded and well-sorted grains produce more consistent results. These outcomes suggest that the Hazen formula remains reliable for clean, uniformly graded sands with rounded to sub-rounded particles. This study highlights the need to consider grain morphology when applying empirical permeability estimation methods.
Stochastic LQI with Markov Chain for Decreasing The Effect of Random Delay in Networked Control System Ahmad Musthafa Al-Ghifari; Feriyonika; Tjan Swi Hong
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 7 Number 2 (2025)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v7i2.8872

Abstract

A Networked Control System (NCS) is a control system in which actuation and feedback signals are transmitted over a communication network. One of the key challenges in NCS is the presence of random delays introduced by the communication protocol. This study proposes an adaptive approach for tuning the integral gain (​Kint) of the Linear Quadratic Integral (LQI) controller, based on both the current delay state and a predicted delay obtained via a Markov chain model, which has not been explored extensively. The proposed method first maps each delay interval to a corresponding Kint, establishing a delay–gain pair. Then, the integral gain is dynamically updated at each control cycle by combining the current (Kint_t) and the predicted Kint for the next time step (Kint_t+1), using weighted coefficients a and b, respectively, as follows: Kint = a* Kint_t + b* Kint_t+1. Experimental validation demonstrates that, with optimal weights a=0.5 and b=0.5, the proposed method significantly improves system performance. Compared to a fixed (static) Kint​, it reduces the percentage overshoot from 17.06% to 2.45% and decreases the settling time from 457.6 seconds to 254.06 seconds.
Performance Analysis of Single Cylinder Diesel Engine with 2EHN Cetane Number Enhancer on Biodiesel Kristofer Severiano Dinata; Steven Darmawan; Abrar Riza
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 8 Number 1 (2026)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v8i1.8905

Abstract

Diesel engines remain a critical technology across multiple sectors, including transportation, industry, marine, and agriculture, due to their well-known benefits such as high fuel efficiency, robust durability, and superior torque output. Even as electric vehicle technology rapidly advances, diesel engines continue to be utilized in demanding applications that require reliable, high-power performance under harsh conditions. This enduring relevance stems from their higher thermal efficiency and remarkable ability to function in extreme environments. However, diesel fuel differs from petrol in its combustion characteristics, notably having a lower combustion rate. This rate is measured by the cetane number, with higher cetane values indicating better combustion quality. To optimize engine performance, especially when using lower-cetane diesel fuel, additives are often used to increase the cetane number. This study explores the effects of combining 2-ethylhexyl nitrate, a cetane number enhancer, with Pertamina’s biodiesel product, bio solar. Using a single-cylinder diesel engine and a prony brake for testing, the study found that a 1:100 ratio of CNE to fuel delivered the best results among all mixtures. This blend achieved the highest thermal efficiency at 30.23% and recorded the lowest brake specific fuel consumption at 7.78265E-05 kg/kWh.
Performance Analysis of Single Cylinder Diesel Engine on Biodiesel Fuel Temperature Variation Erwin Pratama; Abrar Riza; Steven Darmawan
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 8 Number 1 (2026)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v8i1.8908

Abstract

The use of biodiesel or bio solar fuel continues to grow in line with the increasing awareness of renewable energy and environmental concerns. However, the relatively high viscosity of bio solar fuel can affect the performance of diesel engines. This study aims to analyze the effects of fuel temperature variation using a heater on the performance of diesel engines. The research method employed was experimental testing on a single cylinder Jiangdong 170F diesel engine with fuel heating set at temperatures 40oC, 50oC, 60oC, and 70oC. The parameters analyzed include power, torque, fuel flow rate, thermal efficiency, and Brake Specific Fuel Consumption. The test results show that at a temperature of 50oC, the engine produced the highest power and torque at a rotational speed of 2600 rpm with a torque of 6.2 Nm and power output of 1.68 kW. At temperatures of 70oC the highest thermal efficiency was observed along with reductions in fuel consumption and BSFC at the same engine speed, yielding a thermal efficiency of 34.04%, a fuel consumption rate of 1.128×10-5 kg/s and a BSFC of 6.912×10-5 g/kWh. These results suggest that a temperature of 50oC is recommended for achieving high power and torque at high speeds, while temperature 70oC is recommended for attaining high thermal efficiency and lower fuel consumption at high engine speeds.
Is Transit-Oriented Development (TOD) Project Financially Feasible? A Case Study from Emerging Economies Herawati Zetha Rahman; Imam Hagni Puspito; I Nyoman Teguh; Najwa; Caroline Krisnadewi
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 8 Number 1 (2026)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v8i1.8973

Abstract

Transit-Oriented Development is a crucial strategy for addressing urban sprawl and improving mobility, particularly in rapidly urbanizing regions like Indonesia. Transit-Oriented Development integrates high-density, mixed-use developments with public transportation infrastructure, offering sustainable urban growth solutions. However, despite its benefits, the financial feasibility of Transit-Oriented Development in emerging economies remains under-explored. This study assesses the financial viability of a Transit-Oriented Development project in Tangerang, Greater Jakarta, focusing on key financial indicators such as Capital Expenditure, Operational Expenditure, Internal Rate of Return, and Net Present Value. The study uses financial modeling, analyzing data from the project's feasibility reports and investment summaries. The results show positive Internal Rate of Return, and Net Present Value, indicating financial viability under base case assumptions. However, the analysis reveals sensitivity to changes in Capital Expenditure and revenue assumptions, with increased Capital Expenditure reducing profitability and extending the payback period. This research fills the gap in Transit-Oriented Development financial feasibility studies in developing economies, providing valuable insights for similar projects in Southeast Asia and beyond. The findings underscore the importance of effective financial planning and risk management in ensuring the long-term success and sustainability of Transit-Oriented Development projects, highlighting the need for strong public-private partnerships to mitigate financial risks.
Development of a Platform Supply Vessel: Design, Resistance Assessment, and Prototype Fabrication for Offshore Operations in Natuna, Indonesia Fathin Muhammad Mahdhudhu; Fakhri Akbar Ayub; Muhammad Akmal Apriansyah Efendy; Muhammad Ivan Kurniawan; Choirul Anam; Fathan Mubina Denu; Nabillah Jasmine Anugrahputri
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 8 Number 1 (2026)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v8i1.8994

Abstract

Maritime transportation serves as a vital component of inter-island connectivity in Indonesia, particularly in supporting offshore oil and gas exploration activities. This study focuses on addressing the rarity of Platform Supply Vessel in the Natuna Islands, which are needed to support offshore operations to optimize the exploration of Natuna's abundant natural resources. The design process begins with the determination of the vessel’s principal dimensions, derived from benchmark vessel data and dimensional ratio analysis. The hull form is subsequently developed into a 3D model to produce a lines plan. Resistance analysis is conducted based on the Holtrop method, encompassing components such as frictional resistance, wave-making resistance, transom drag, and air resistance. A scaled physical model is also constructed using a non-molded hull fabrication technique to validate the design. The findings indicate that the proposed hull design satisfies the specified performance criteria and demonstrates favorable resistance characteristics. This research answers the rarity of studies on Platform Supply Vessel specifically for Natuna by contributing a comprehensive study focusing on design, fabrication, and cost analysis.

Page 22 of 42 | Total Record : 411

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