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All Journal JUKI : Jurnal Komputer dan Informatika Integrated Mechanical Engineering Journal
Qudratullah, Fahmi
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Automotive Engineering Computer Science & IT Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Implementasi Algoritma A* untuk Menentukan Jalur Tercepat Penjemputan Ambulans di RSUD Aulia Pandeglang, Banten Setiyowati, Sri; Rizky, Robby; Maesaroh, Mamay; Susilawati, Susilawati; Yunita, Ayu Mira; Sugiarto, Agung; Hakim, Zaenal; Pratama, Aghy Gilar; Wibowo, Andrianto Heri; Susanti, Ervi NUrafliyan; Wardah, Neli Nailul; Hakim, Moh Azizi; Qudratullah, Fahmi
JUKI : Jurnal Komputer dan Informatika Vol. 8 No. 1 (2026): JUKI : Jurnal Komputer dan Informatika, Edisi Mei 2026
Publisher : Yayasan Kita Menulis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53842/juki.v8i1.2330

Abstract

Permasalahan keterlambatan penjemputan pasien oleh ambulans dapat terjadi akibat pemilihan rute yang kurang tepat, kondisi jalan yang bervariasi, serta jarak tempuh yang tidak efisien. Penelitian ini bertujuan untuk mengimplementasikan Algoritma A dalam menentukan jalur tercepat penjemputan ambulans di RSUD Aulia Pandeglang, Banten. Metode yang digunakan adalah pendekatan pencarian jalur terpendek berbasis graf, dengan titik lokasi direpresentasikan sebagai node dan jalan sebagai edge. Algoritma A* digunakan karena mampu mencari rute optimal dengan mempertimbangkan nilai biaya perjalanan dan estimasi jarak menuju tujuan melalui fungsi heuristik. Data yang digunakan berupa titik lokasi awal ambulans, lokasi penjemputan pasien, serta hubungan antarjalur yang tersedia. Hasil dari penelitian ini adalah rancangan sistem yang mampu memberikan rekomendasi jalur tercepat bagi ambulans sehingga proses penjemputan pasien menjadi lebih efektif dan efisien. Dengan adanya penerapan Algoritma A*, diharapkan pengambilan keputusan rute ambulans dapat dilakukan secara lebih cepat, tepat, dan mendukung peningkatan kualitas pelayanan kesehatan.
Experimental Analysis of Tire Inflation Pressure Effects on Fuel Consumption and CO₂ Emissions in a Gasoline-Powered Light Vehicle Hakim, Moh Azizi; Maulana, Rizqi Adi; Sukmara, Sony; Heriyana, Erik; Qudratullah, Fahmi
Integrated Mechanical Engineering Journal Vol. 1 No. 1 (2023): Integrated Mechanical Engineering Journal (IMEJOUR) Vol. 1 No. 1 2023
Publisher : Department of Mechanical Engineering, Faculty of Engineering and Computer Science, Universitas Global Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/imejour.v1i1.202

Abstract

Fuel consumption reduction remains an important issue in automotive engineering because it affects vehicle operating costs, energy efficiency, and carbon dioxide emissions. One of the practical factors influencing fuel consumption is tire inflation pressure. Under-inflated tires increase tire deformation and rolling resistance, which require additional engine power to maintain vehicle motion. This study aims to analyze the effect of tire inflation pressure variation on fuel consumption and estimated CO₂ emissions in a gasoline-powered light vehicle. The experimental design used four tire pressure levels, namely 26 psi, 30 psi, 33 psi, and 36 psi. Fuel consumption was measured using the full-to-full method on a fixed driving route under controlled operating conditions, including vehicle load, fuel type, route distance, and driving behavior. CO₂ emissions were estimated using a gasoline emission conversion factor. The experimental template shows that lower tire pressure tends to increase fuel consumption. At 26 psi, the vehicle recorded the highest fuel consumption, while pressure near the manufacturer’s recommendation produced lower fuel consumption. The estimated CO₂ emissions followed the same pattern because they were directly proportional to the amount of gasoline consumed. These findings indicate that tire pressure maintenance can contribute to fuel efficiency improvement and emission reduction without requiring modification of the engine system. The main contribution of this study is the formulation of a simple experimental framework for evaluating tire pressure, fuel economy, and emission relationships in light vehicles. This research is relevant for automotive maintenance practice, energy efficiency studies, and sustainable transportation engineering.
Mechanical and Moisture Resistance Evaluation of Alkali-Treated Coconut Fiber/E-Glass Hybrid Epoxy Composite for Lightweight Engineering Applications Sukmara, Sony; Ariyanto; Hakim, Moh Azizi; Heriyana, Erik; Qudratullah, Fahmi
Integrated Mechanical Engineering Journal Vol. 1 No. 1 (2023): Integrated Mechanical Engineering Journal (IMEJOUR) Vol. 1 No. 1 2023
Publisher : Department of Mechanical Engineering, Faculty of Engineering and Computer Science, Universitas Global Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/imejour.v1i1.203

Abstract

In mechanical engineering, the demand for lightweight and sustainable materials is gaining significant momentum, as the choice of material impacts the efficiency, energy usage, and environmental footprint of mechanical systems. Natural fiber reinforced polymer composites have many advantages like low density and renewability but they are not widely used due to moisture sensitivity and poor fiber–matrix bonding. In this study, an alkali treatment process of coconut fibers and their hybridization with E-glass fibers for structural and semi‑structural components application using an epoxy composite is investigated. The work is tested for its tensile, flexural, impact, specific strength and moisture absorption properties. Coconut fibers were processed with sodium hydroxide to increase the surface roughness and remove hydrophilic impurities from the fibers and composite laminates were prepared by a hand lay-up technique in which the fibers were cured at room temperature. Experimental study shows that the tensile and flexural strength, impact resistance and specific strength of natural fiber composites of hybridization with E‑glass fiber are significantly increased when compared to natural fiber composites without hybridization, mainly due to the bridging effect of E‑glass fiber and reduced fiber pull out and load transfer. The hybrid composite also demonstrates reduced water absorption, further enhancing its potential for lightweight applications where durability and environmental considerations are paramount. In summary, this study contributes to the progress of sustainable composite development by comprehensively uniting the fiber treatment, hybrid reinforcement, mechanical evaluation, and moisture resistance in a single experimental system.
Energy, Exergy, and Drying Kinetics Assessment of a Solar-Assisted Heat Pump Dryer for Sustainable Agricultural Product Processing Qudratullah, Fahmi; Efendi, Irwan Saputra; Hakim, Moh Azizi; Heriyana, Erik; Sukmara, Sony
Integrated Mechanical Engineering Journal Vol. 2 No. 1 (2024): Integrated Mechanical Engineering Journal (IMEJOUR) Vol. 2 No. 1 2024
Publisher : Department of Mechanical Engineering, Faculty of Engineering and Computer Science, Universitas Global Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/imejour.v2i1.204

Abstract

Drying is an important agricultural post-harvest operation which requires high energy input and produces inconsistent agricultural products quality by conventional methods. Alternatively, solar assisted heat pump drying can be provided which is more efficient by utilizing both renewable solar heat and heat pump dehumidification and heat recovery. In this study, an integrated drying kinetics, energy analysis and exergy evaluation framework are developed to evaluate the performance of solar-assisted heat pump dryer. The framework describes mathematically derived indicators to describe moisture reduction behavior, drying rate, energy consumption, coefficient of performance, specific moisture extraction rate, drying efficiency, and exergy efficiency. Illustrative results demonstrate that the system continuously reduces the moisture content while increasing the energy utilization in comparison to conventional hot-air drying, where the COP and the SMER are important transients measuring energy delivery for useful purposes and the ability to remove moisture, respectively. Exergy analysis also pinpoints the main exergy-irreversibility sources in the drying chamber and heat-transfer components. The study is overall an integrated mechanical-engineering approach that connects drying behavior, heat transfer, energy consumption and exergy losses for designing and optimizing sustainable and energy efficient dryers for agricultural and food processing applications.
Sustainable Turning Performance of AISI 1045 Steel under Nanofluid Minimum Quantity Lubrication: An Integrated Assessment of Surface Roughness, Tool Wear, Specific Cutting Energy, and Carbon Emission Heriyana, Erik; Ramadhan, Arief Syahrul; Sukmara, Sony; Hakim, Moh Azizi; Qudratullah, Fahmi
Integrated Mechanical Engineering Journal Vol. 2 No. 1 (2024): Integrated Mechanical Engineering Journal (IMEJOUR) Vol. 2 No. 1 2024
Publisher : Department of Mechanical Engineering, Faculty of Engineering and Computer Science, Universitas Global Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/imejour.v2i1.205

Abstract

With the growing demand for sustainable machining, this has focused interest on finding sustainable alternatives to traditional cutting that is energy consuming, fast tool change and has negative environmental impact. A cleaner method is Nanofluid minimum quantity lubrication (MQL) which involves using cutting fluid in reduced quantities to achieve appropriate lubrication and cooling. In this study, the surface roughness, tool wear, material removal rate, cutting power, specific cutting energy and carbon emission of the nanofluid-MQL process were studied. The effect of cutting speed, feed rate, depth of cut and lubrication condition on the aspect of quality of machining, degradation of tool and energy and environmental performances are analyzed by using a narrative mathematical model. The results revealed that machining performance can be improved using nanofluid-MQL, as it provides excellent lubrication, lower friction, and more stable chip formation, which results in lower surface roughness, lower tool wear, and lower specific cutting energy. The study has developed a comprehensive sustainable machining model that connects machining parameters with tool life, surface integrity, energy usage and carbon emission, which can facilitate the realization of cleaner production and more energy efficient manufacturing systems.
Hydraulic Performance Assessment of a Low-Head Cross-Flow Turbine for Pico-Hydropower Applications: An Integrated Analysis of Flow Rate, Torque, Shaft Power, and Turbine Efficiency Hakim, Moh Azizi; Najarudin, Arya; Sukmara, Sony; Heriyana, Erik; Qudratullah, Fahmi
Integrated Mechanical Engineering Journal Vol. 2 No. 2 (2024): Integrated Mechanical Engineering Journal (IMEJOUR) Vol. 2 No 2 2024
Publisher : Department of Mechanical Engineering, Faculty of Engineering and Computer Science, Universitas Global Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/imejour.v2i2.206

Abstract

Pico‑hydropower is a viable solution to produce electricity using small amounts of water from a water source, thereby reducing the need for significant infrastructure in rural and remote settings. The cross-flow turbine is well suited and has simple construction and stable operation for low head, variable flow conditions, among the available turbine types. An integrated hydraulic performance evaluation of the low head cross flow type turbine for pico-hydro application is presented here, where the relationship among water head, flow rate, hydraulic power, runner speed, torque, shaft power and turbine efficiency have been examined. The framework translates basic equations of flow rate, hydraulic power, angular velocity, shaft power, tip-speed ratio and hydraulic efficiency into narrative language. Illustrative examples demonstrate that the higher the flow rate and the greater the effective head, the greater the hydraulic power, and the higher the overall efficiency, depending upon the efficiency of the runner in converting the water energy to shaft output. The analysis emphasizes the fact that turbine output power is not the only criterion for performance—the hydraulic input power and conversion loss also play a role. This study has contributed a simple yet comprehensive mechanical-engineering approach to analyzing pico-scale cross-flow turbines under low-head conditions which can be used in laboratory testing, small-scale turbine development, and deployment of such turbines for renewable energy in rural water channels.
Co-Authors Agung Sugiarto Andrianto Heri Wibowo Ariyanto Ayu Mira Yunita Efendi, Irwan Saputra Hakim, Moh Azizi Heriyana, Erik Maesaroh, Mamay Maulana, Rizqi Adi Najarudin, Arya Neli Nailul Wardah Nurafliyan Susanti, Ervi Pratama, Aghy Gilar Ramadhan, Arief Syahrul Rizky, Robby Sri Setiyowati Sukmara, Sony Susilawati, Susilawati Zaenal Hakim