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Syamsiar Kautsar
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Jurnal Teknik Terapan (J-TETA)
Published by Politeknik Negeri Jember
ISSN : -     EISSN : 2829615X     DOI : https://doi.org/10.25047/jteta
Core Subject : Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering
JTETA : Jurnal Teknik Terapan (EISSN. 2829-615X) is a peer-reviewed journal published by Politeknik Negeri Jember. JTETA is published two times annually, in April and October. This journal provides a place for academics, researchers, and practitioners to publish scientific articles. The scope of the articles listed in this journal is related to various topics such as Civil Engineering, Electrical Engineering, Informatics Engineering, Craft Engineering, Architecture, Industrial Engineering, Mechanical Engineering, Engineering Education, and other related engineering fields.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 11 Documents
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Search results for , issue "Vol. 4 No. 2 (2025): Oktober" : 11 Documents clear
Implementasi Algoritma LightGBM untuk Prediksi Status Gizi Bayi dan Balita di Desa Doko Kabupaten Kediri Thoriqulhaq, Muhammad; Idhom, Mohammad; Maulida Hindrayani, Kartika
Jurnal Teknik Terapan Vol. 4 No. 2 (2025): Oktober
Publisher : P3M Politeknik Negeri Jember

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Abstract

MThe issue of nutritional status among infants and toddlers remains a serious concern in Indonesia, particularly in rural areas. Doko Village was chosen as the research location due to its significant challenges in child health. This study aims to develop a nutritional status prediction model based on the LightGBM algorithm, capable of processing anthropometric data to classify nutritional categories such as "Underweight", "Normal", and "Overweight". Using an 80:20 training-to-testing data ratio, the model achieved 97% accuracy and a 94% F1-score. In addition to building the prediction model, this study also developed an interactive web application using Streamlit, and compared its results with the conventional WHO AnthroPlus method. The results indicate that LightGBM offers advantages in terms of speed, flexibility, and predictive accuracy based on local data.
Pengaruh Komposisi Campuran dan Ukuran Butiran terhadap Kualitas Briket Arang dari Limbah Serbuk Kayu Mahoni (Swietenia macrophylla) dengan Perekat Daun Jarak Pagar (Jatropha curcas) Prasetyo, Dafit Ari; Violita, Elvira Anne; Sholikah, Umi; Astuti, Ulvi Pri
Jurnal Teknik Terapan Vol. 4 No. 2 (2025): Oktober
Publisher : P3M Politeknik Negeri Jember

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Abstract

Mahogany sawdust waste (Swietenia macrophylla) has not been widely utilized and is only used as baglog in oyster mushroom cultivation and particle board mixture. The potential of mahogany sawdust waste as fuel is quite high, especially when viewed from its calorific value which reaches 4,652.34-4,844.83 cal/g. Making mahogany sawdust into charcoal briquettes with a mixture of castor oil plant leaves (Jatropha curcas) can increase the calorific value and its usefulness as fuel. The variations of the castor oil leaf adhesive mixture used are 10%, 20%, and 30% as well as variations in the size of mahogany sawdust charcoal grains 35 mesh, 60 mesh, and 100 mesh. The briquette with the best composition produced is variation A1B1, namely a briquette with a 10% adhesive mixture and a particle size of 35 mesh (particle size ≃ 0.5 mm) with a calorific value of 6,122 cal/g, water content of 5.62%, ash content of 6.46% and has met the quality standards for charcoal briquettes according to SNI 1-6235-2000
Perbandingan Kinerja Aerodinamika Berbagai Geometri Bodi terhadap Gaya Hambat dan Gaya Angkat pada Kendaraan Hemat Energi Reinaldi Teguh Setyawan; Hajar, Ibnu; Gunawan, Gunawan
Jurnal Teknik Terapan Vol. 4 No. 2 (2025): Oktober
Publisher : P3M Politeknik Negeri Jember

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Abstract

The geometric shape of a vehicle's body plays a critical role in determining aerodynamic efficiency, particularly in lightweight, energy-efficient vehicles. This study analyzes and compares the aerodynamic performance of three body shapes—boxy, wedge, and streamline—based on mathematical calculations using physical parameters and aerodynamic coefficients sourced from established technical literature. Drag force (????d) and lift force (????l) were calculated using classical aerodynamic formulations, referring to Bernoulli’s principle and standard fluid dynamics equations, at a constant vehicle speed of 60 km/h with frontal area estimations derived from proportional two-dimensional sketches. The results indicate that the streamline body yields the lowest aerodynamic forces, with a drag force of 38.27 N and a lift force of 15.31 N, significantly lower than the boxy shape which generates 64.12 N and 37.10 N, respectively. This demonstrates the effectiveness of streamlined geometry in reducing air resistance and improving vertical stability. In conclusion, theoretical aerodynamic analysis can provide reliable early-stage design insights for energy-efficient vehicles without the need for complex simulations.
Pengaruh Kinerja Baterai Mobil Listrik LAKSAMANA V2 Terhadap Variasi Kecepatan Dan Beban Kendaraan Menggunakan Simulink Kafaj, M. Al; Setyawan, Reinaldi Teguh; Umira, Siti
Jurnal Teknik Terapan Vol. 4 No. 2 (2025): Oktober
Publisher : P3M Politeknik Negeri Jember

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Abstract

Battery performance is a crucial factor in determining the efficiency and driving range of electric vehicles. This study aims to analyze the effect of battery performance on variations in vehicle speed and load using MATLAB/Simulink simulation modeling. The developed simulation model reflects the real operational conditions of the Laksamana V.2 electric vehicle, with key parameters including a 48V battery voltage, 2 kW motor, and varying vehicle loads. Simulations were carried out at different speeds ranging from 20 km/h to 60 km/h under two conditions: unloaded and fully loaded. The results show that power consumption increases with higher speed and load. The simulation also reveals that the total battery energy gradually decreases over time due to fluctuating current consumption. Motor torque is higher at lower speeds and tends to decrease at higher speeds. The system’s maximum efficiency reaches 83.8% at 55 km/h under no-load conditions. These findings indicate that speed and load variations significantly affect battery performance and energy efficiency, and that Simulink modeling is effective in visualizing and evaluating the behavior of electric vehicle systems comprehensively.
Analisis Perawatan Mesin Boiler Kapasitas 21 Ton/Jam Menggunakan Metode Overall Equipment Effectiveness (OEE) Pada PT XYZ Muhammad Rizqi Fauzi; Arif, Saiful; Hendarti, Devina Rosa
Jurnal Teknik Terapan Vol. 4 No. 2 (2025): Oktober
Publisher : P3M Politeknik Negeri Jember

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Abstract

This research aims to analyze the performance and maintenance of the 21-ton/hour capacity boiler at PT XYZ through the application of the Overall Equipment Effectiveness (OEE) method. The boiler machine plays a crucial role in the production process, but it often experiences performance degradation that can disrupt the smooth operation of the company. OEE is used to measure how well the machine operates based on three main aspects: availability, performance, and quality. In addition, this study also uses the Six Big Losses analysis to identify the main causes of performance losses in the machine. The data used includes operational time, downtime, and the product quality of the boiler machine from January to December 2024. The analysis results show that the average OEE value of the boiler machine at PT XYZ reaches 93.49%, with an average availability value of 96.37%, performance value of 97.07%, and quality value of 100%. However, the main issues found are losses due to sudden breakdowns (breakdown losses) of 3.64% and reduced speed losses of 1.18%. The performance decline is mostly caused by issues with fuel and combustion. Therefore, it is recommended to conduct more routine fuel testing and improve the combustion process to reduce soot formation and maintain machine stability. This research is expected to assist PT XYZ in improving boiler machine performance and the smooth operation of production.
Pengaruh Variasi Waktu Transesterifikasi dan Konsentrasi Katalis terhadap Karakteristik Sifat Fisik Biodiesel Berbahan Minyak Jelantah Rosidah, Cicih; Nurul Fadhillah, Ghina; Rohmaful Aeni, Alfieta; Yuliasari, Fitri; Pangni Fahriani, Vera
Jurnal Teknik Terapan Vol. 4 No. 2 (2025): Oktober
Publisher : P3M Politeknik Negeri Jember

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Abstract

As a promising alternative fuel, biodiesel is expected  to grow in the future, aligning As part of global initiatives to lessen dependence on fossil fuels. This study focuses on using used cooking oil from frying chicken As a feedstock for biodiesel production through transesterification. The aim is to explore the effects of varying transesterification times and catalyst concentrations on the physical properties of the biodiesel produced, including density, viscosity, and yield. The method involves testing at different time intervals of 30, 40, and 50 minutes, with catalyst concentrations of 1%, 1.5%, and 2% to determine optimal conditions. Additionally, Fourier Transform Infrared (FTIR) tests were conducted to identify functional groups in the compounds.Results indicate that the highest biodiesel yield was achieved after 30 minutes of transesterification with a 1% catalyst concentration. The best viscosity was noted at 40 minutes with a 2% catalyst, while the optimal density was recorded at 30 minutes with a 2% catalyst.
Karakterisasi dan Optimasi penggunaan Katalis CaO/SiO₂ dari Biomassa untuk Sintesis Biodiesel dari Minyak Jelantah Dian, Amalia; Meka Saima Perdani; Hilman Imadul Umam; Christin Octaviani Sitanggang; Eti Ayu Nurhana
Jurnal Teknik Terapan Vol. 4 No. 2 (2025): Oktober
Publisher : P3M Politeknik Negeri Jember

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Abstract

Environmentally friendly biodiesel can be produced from used cooking oil through transesterification with heterogeneous catalysts. This study synthesized CaO–SiO₂ catalysts from eggshells and rice husks through calcination and impregnation, with a reaction at 65°C, an oil:methanol ratio of 1:9, and a catalyst variation of 4–8%. FTIR, SEM, and BET characterizations showed the presence of CaO and Si–O–Si with porous morphology and surface area that support catalytic activity. The best results were achieved at 4% catalyst with a conversion of 63.64%, demonstrating the potential of biomass as a sustainable catalyst for biodiesel production.
Analisis Numerik Pengaruh Variasi Tinggi Vortex Generator terhadap Karakteristik Aerodinamika Sayap Berbasis Computational Fluid Dynamics (CFD) Perkasa, Rilis Eka; Mashudi, Imam; Gunawan, Chandra; Amrullah, Utsman Syah
Jurnal Teknik Terapan Vol. 4 No. 2 (2025): Oktober
Publisher : P3M Politeknik Negeri Jember

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Abstract

A vortex generator is an aerodynamic device installed on wings or other surfaces to enhance lift and delay stall at high angles of attack. This study aims to analyze the effect of vortex generator installation on the aerodynamic characteristics of a straight wing. Numerical simulations were conducted using the computational fluid dynamics (CFD) method on a three-dimensional wing model with a NACA 4412 airfoil section. Triangular vortex generators with heights of 10 mm and 20 mm were applied, while a clean wing without vortex generator was used as a reference. The wing was subjected to an airflow velocity of 50 m/s at several angles of attack. The main parameters observed were the lift coefficient (CL), drag coefficient (CD), and flow visualization around the wing surface. The simulation results show that the addition of a 10 mm vortex generator increases CL at higher angles of attack compared to the clean wing. In contrast, the installation of a 20 mm vortex generator primarily resulted in a higher CD and did not provide a positive contribution to lift performance. Overall, it could be concluded that  for this research configuration, the 10 mm vortex generator increase the aerodynamic performance of the wing.
Perkiraan Greenhouse Gases (GHGs) Sampah Berbasis 4R (Reduce, Reuse, Reclycle, Replace) Lingkungan Kampus Irawan, Andik; Adi Tyagita, Dicky; Triadji Nugroho, Wendy; Wahyudiono, Arif; Ramadan, Sahrul; Alvian, M Syahrul
Jurnal Teknik Terapan Vol. 4 No. 2 (2025): Oktober
Publisher : P3M Politeknik Negeri Jember

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Abstract

Campus waste management based on the principles of Reduce, Reuse, Recycle, Replace (4R) is a strategic approach to support carbon-neutral targets through the reduction of Greenhouse Gases (GHG). This study aims to estimate the GHG emission reduction potential of 4R activities in the academic community of Politeknik Negeri Jember. Questionnaire survey data from 309 respondents, divided by study program Automotive Engine, Renewable Energy, and Mechatronics Engineering, were categorised into 4R activities. The results showed that the participation contribution in the Recycle category was 82.5% and Replace 78.5%, Reduce 77.75% and Reuse 74%. Emission reduction estimation was conducted using the Life Cycle Assessment (LCA) approach based on IPCC emission factors, which takes into account the composition of organic waste, plastic, paper and residue. The LCA analysis showed that implementing the 4R has the potential to reduce emissions by 1.2tons of CO₂-eq per month, with the largest contribution from the activities of Reduce 360kg, Reuse 300kg, Recycle 300kg, and Replace 240kg. The findings indicate that participatory-based interventions and integration of the campus environmental curriculum play an important role in building a low-carbon ecosystem.
Studi Eksperimental Burner untuk Bahan Bakar Pirolisis Polypropylene: Analisis Emisi Gas Buang Aditya Wahyu Pratama; Novangga Adi Mulyono; Audha Fitrah Aulina; Reynaldi Akbar Ali; Faruq Avero Azhar; Andik Irawan; Wijaya, Hardian Asep
Jurnal Teknik Terapan Vol. 4 No. 2 (2025): Oktober
Publisher : P3M Politeknik Negeri Jember

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Abstract

Alternative fuels derived from the pyrolysis of Polypropylene (PP) plastic waste present a promising approach to decreasing reliance on fossil fuels while also addressing plastic waste reduction. his experimental study investigates the exhaust emission characteristics of a modified burner equipped with a blower compared to a conventional burner. The experimental setup utilized specially designed burners to enhance the combustion performance of PP pyrolysis oil. Fuel blends containing 5%, 10%, and 20% PP pyrolysis oil mixed with Pertamax were tested. Emission parameters, including CO, CO₂, HC, and NOx concentrations, were measured under idle operating conditions using a gas analyzer. The findings revealed that the modified burner operating with a 10% PP pyrolysis oil blend produced lower HC, O₂, and lambda emission levels than the standard burner. Conversely, CO and CO₂ emissions were found to be higher for the modified burner configuration. In both burner types, NOx emissions were not detected.

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