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All Journal JURNAL INTEGRASI JOURNAL OF APPLIED INFORMATICS AND COMPUTING Angkasa: Jurnal Ilmiah Bidang Teknologi Owner : Riset dan Jurnal Akuntansi Jurnal Teknologi dan Riset Terapan (JATRA) Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam J-ENSITEC (Journal of Engineering and Sustainable Technology) Journal of Applied Mechanical Technology (JAMET)
Mohamad Alif Dzulfiqar
Politeknik Negeri Batam
Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Perbandingan Variasi Power Dalam Proses Laser Engraving Terhadap Hasil Produk Stainless Steel Purba, Adi Syahputra; Hermawan, Muhammad Ghandy Razzaki; Manurung, Meilani Mandhalena; Stefani, Windy; Dzulfiqar, Mohamad Alif; Gunawan, Leo Van
Journal of Applied Mechanical Technology Vol 2 No 1 (2023): Journal of Applied Mechanical Technology (JAMET)
Publisher : Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (808.105 KB) | DOI: 10.31884/jamet.v2i1.29

Abstract

Marking machining processes using lasers have developed in the industrial world. Having high precision and good final quality is one of the advantages of this laser machine. There is a thermal effect generated in the process, so we must understand the impact of the power applied to the material. Carry out the laser marking process with the engraving method on a stainless steel plate material which is given a variation of strength to observe the difference in the final result of a marking. Make as many as 3 pcs of products for each variation of power parameters. The product that has been produced will also be observed for surface roughness on the marking, which aims to find out how deep the food is from the marking. Observation of the surface roughness of the marking on the product using the Surface Roughness Tester 3 times for each product. The results of the data that have been taken will only be observed and entered into the marking results into the roughness class according to ISO or DIN 4763:1981. The marking process uses power variations of 20%, 40%, 60%, 80% and 100%. The results of the marking with the lowest power of 20% produce markings with a roughness value of 0.029µm – 0.110µm and enter into class N3 while the results of marking with the greatest power of 100% obtain a roughness value of 18.210µm – 19.876µm which is included in the roughness class N10. Based on the data obtained in the engraving process with different power variations, it can be interpreted that the higher the power supplied, the higher the roughness value
Pengaruh Engine Bleed Trip Terhadap Tingkat Kebutuhan Pergantian Komponen Pada Pesawat B737-800 Nova, Muhammad Andi; Iradhat, Achmad Yudha; Siregar, James; Dzulfiqar, Mohamad Alif; Dija, Nur Rafia; Rossbandrio, Wowo
Jurnal Teknologi dan Riset Terapan (JATRA) Vol. 6 No. 1 (2024): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2024
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v6i1.7795

Abstract

An engine bleed trip is an indication that there is a failure in the engine bleed system in regulating the temperature and pressure of the bleed air. This can affect the work of other systems that rely on the output of the engine bleed system, one of which is the cabin pressure system. The aim of this research is to find out the percentage level of the need for main components in the engine bleed system to be replaced in handling engine bleed trip cases. This research is an ex post-facto comparative research with primary data collection methods sourced from aircraft maintenance databases and interviews. The research results showed that from a total of 52 bleed trip cases that occurred during 17 months, the percentage of main components that needed to be replaced were the 390F thermostat sensor (42.3%), precooler control valve (19.2%), pressure regulating shuttle valve (11 .5%), bleed air regulator (7.7%), and the rest are other components.
STUDI PERHITUNGAN DAN IMPLEMENTASI AIRBAG PADA PELUNCURAN KAPAL TONGKANG 330 FEET BERDASARKAN STANDAR CB/T 3837-1998 Dzulfiqar, Mohamad Alif; Pujo, Nur Fitri; Pamungkas, Nurman; Husen; Mufariz, Mufti Fathonah; Fadhilah, Nurul
J-ENSITEC Vol. 11 No. 01 (2024): December 2024
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jensitec.v11i01.11541

Abstract

Ship launching is a crucial stage in shipbuilding, and the airbag launching method has become widely adopted due to its flexibility, cost efficiency, and better safety compared to conventional methods. The ship launching stage is a crucial part of the ship's transition from land to sea, representing a significant innovation in the maritime field. Among the various methods available, the use of airbags has become one of the most effective and widely applied techniques. The approach taken is a quantitative approach to ensure accurate calculations in the process of launching ships using airbags. The quantitative approach aims at calculating the right number and distance between airbags to ensure the safety and efficiency of ship launching, in accordance with the industry standard C/B T 3837-1998. CB/T 3837-1998 standard can be applied to ensure stability and safety during the launching process, as well as minimize the risk of damage to the ship and ensure the launching process runs smoothly. This research aims to calculate the number and distance between airbags used in the launching of a 330-foot barge. The main ship dimensions and airbag specifications were obtained through field interviews to support accurate calculations. The results show that 18 airbags are required, with a distance between airbags ranging from 6.66 to 11.78 meters using a crossover arrangement configuration. This calculation is based on the main dimensions of the ship and the specifications of the airbags used. T
Media Pembelajaran Pengenalan Citra Pesawat Udara Dengan Memanfaatkan Metode Jaringan Saraf Tiruan Dzulfiqar, Mohamad Alif; Irmansyah Lubis, Ahmadi
Jurnal Teknologi dan Riset Terapan (JATRA) Vol. 6 No. 2 (2024): Jurnal Teknologi dan Riset Terapan (JATRA) - December 2024
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v6i2.8885

Abstract

This study developed an image classification model to help learn the recognition of aircraft types using the Probabilistic Neural Network (PNN) method, one of the techniques in artificial neural networks that is often used for image classification. PNN works by classifying categories based on the calculation of the distance between the concentration and probability functions. In the process, PNN consists of four main stages: Input Layer, Pattern Layer, Summation Layer, and Output Layer. This study used 90 test data from three different object classes taken from the available data sets. The test results show that the application of the PNN algorithm in aircraft image classification provides an average accuracy of 81.11 %, which is quite promising to be applied as a learning module for the introduction of aircraft types for Aircraft Maintenance Engineering students at the Batam State Polytechnic. The results of this study show that the PNN method has great potential to help automatic classification and can be optimized to improve the accuracy of classification in further learning.
Pengaruh Proses Tacking dan Welding Sequence Terhadap Distorsi Pada Pengelasan Butt Joint Pipa Dengan Flange Berbahan Carbon Steel Pamungkas, Nurman; Leksonowati, Nur Fitria Pujo; Mufariz, Mufti Fathonah; Hakim, Rahman; Baharudin, Budi; Dzulfiqar, Mohamad Alif; Saputra, Ihsan; Aryswan, Adhe; Reynaldi, Muhammad Ryan
Jurnal Teknologi dan Riset Terapan (JATRA) Vol. 5 No. 2 (2023): Jurnal Teknologi dan Riset Terapan (JATRA) - December 2023
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v5i2.6893

Abstract

This research explores the issue of distortion in spool pipes within the context of the fabrication process, with a specific focus on pipe connections with flanges. The main objective of this study is to investigate the impact of distortion caused by the tacking process during fit-up and the sequence of welding sequences in the welding process. The experiments were conducted by collecting data through inspections of concentricity in the connections using the Total Station Sokkia CX 101 S/N GP1159 tool, with tolerances set at 1, and 0.75 for capping weld. Fabrication Piping and Structure Onshore served as the testing location, with ASTM A671 CC60-12 as the testing material. All tests were conducted at room temperature. The inspection results were used as a guide for the repair process, providing instructions to the Fitter for improving the connections and enabling the welder to maintain the precision of the pipe connections with flanges to avoid distortion. Based on the experimental results, the concentricity of pipe connections reflects the occurring distortion, while welding sequences show a counter effect at each welding step. The distortion after welding, measured at 0.75, still complies with client specifications.
Aircraft Image Classification on a Small-Scale Dataset using MobileNetV2 with Grad-CAM as Explainable AI Lestari, Susi; Dzulfiqar, Mohamad Alif; Lubis, Ahmadi Irmansyah; Nova, Muhammad Andi; Zaimah, Zaimah; Mulyadi, Mulyadi
Journal of Applied Informatics and Computing Vol. 9 No. 5 (2025): October 2025
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jaic.v9i5.10546

Abstract

This study explores aircraft image classification using MobileNetV2 combined with Gradient-weighted Class Activation Mapping (Grad-CAM) for model interpretability. A dataset of 1,500 balanced images—helicopters, propeller aircraft, and jets—was split into training, validation, and testing sets with data augmentation to reduce overfitting. Transfer learning with pre-trained MobileNetV2 achieved an accuracy of 87.56%, with macro-average precision and recall of 85.76% and 87.69%. Grad-CAM visualizations confirmed that correct predictions relied on distinctive features such as rotor blades, propellers, and engines, while misclassifications often stemmed from background distractions or less discriminative areas. These findings demonstrate the potential of lightweight architectures for small-scale datasets and highlight the value of Explainable AI in validating deep learning models. The study provides a practical reference for educational contexts and offers directions for future work with larger datasets.
Reliability Assessment and Maintenance Strategy of Retreaded Tires in Commercial Aircraft: A Study on Usage Effectiveness Agustini, Vera Yuliana; Nova, muhammad Andi; Suyitno, Budhi Muliawan; Dewadi, Fathan Mubina; Dzulfiqar, Mohamad Alif
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 17, No 2 (2025): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/angkasa.v17i2.2972

Abstract

Aircraft has become a mode of transportation experiencing a significant increase in demand in line with global mobility growth, including in Indonesia. The rise in flight cycles has consequently increased the need for reliable and cost-efficient aircraft tires. This study aims to analyze the reliability and failure patterns of retreaded aircraft tires using the two-parameter Weibull distribution method (β and η). Data were obtained from operational records of commercial aircraft and analyzed to determine the Mean Time To Failure (MTTF), failure modes, and maintenance strategy effectiveness. The results indicate that the highest reliability occurs in the third retreading cycle, with a reliability value of 0.99 and an MTTF of 180 flight cycles. The dominant failure mode is identified as wear-out failure, suggesting that preventive maintenance through regular inspection and replacement is the most effective approach. These findings provide a scientific basis for improving operational safety and efficiency while supporting the implementation of sustainable maintenance practices in the national aviation industry.
OPTIMALISASI SUMBER DAYA DAN TEKNOLOGI DALAM PROGRAM PEMBERDAYAAN MASYARAKAT DESA PULAU JEMARE Leksonowati, Nur Fitria Pujo; Pamungkas, Nurman; Butar, Hendra Butar; Aryswan, Adhe; Juangsa Putra, Lalu Giat; Fyona, Annisa; Nugroho, Cahyo Budi; Wibowo, Ari; Gemala, Mega; Ariyanto, Nugroho Pratomo; Arifin, Nurul Laili; Puspita, Roza; Sriyanto, Sriyanto; Dzulfiqar, Mohamad Alif; Stefani, Windy; Batubara, Ninda Hardina; Fajrin, Aulia; Purba, Adi Syahputra; Manurung, Meilani Mandhalena; Budiman, Budiman
Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam Vol. 7 No. 1 (2025): Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/abdimaspolibatam.v7i1.7105

Abstract

This paper discusses in depth the implementation of the Village Community Empowerment Program (P2MD) carried out on Jemare Island. The main focus of this program is the application of appropriate technology, which includes public street lighting and a water pump system, both powered by solar panels. The main objective of this initiative is to improve the quality of lighting and the provision of clean water on the island, two important aspects that are greatly needed by the local residents. Through a series of intensive observations and discussions with the local residents, the community service team was able to identify and solve various problems faced by the residents. As a result of these efforts, four street lights have been successfully installed and operated, and the water pump system has been successfully connected to the water pump machine and water storage tank. It is hoped that this initiative can have a significant positive impact on the quality of life of the residents of Jemare Island, support their business activities and economy, and provide a solution to the uneven distribution of electricity by the state electricity company (PLN). This solution is practical because it utilizes renewable energy in the form of sunlight, which is abundantly available on Jemare Island.
Pemasangan dan Instalasi Sistem Keamanan di Perumahan Rawan Pencuri Menggunakan CCTV Fanindo Tanjung Uncang Batam Dija, Nur Rafia; James Siregar; Lalu Giat Juangsa Putra; Mohamad Alif Dzulfiqar; Muhammad Andi Nova; Billi Aldin Sumadireja; Yattawuri Arinta Timur
Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam Vol. 7 No. 1 (2025): Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/abdimaspolibatam.v7i1.9526

Abstract

Criminal acts in the community such as theft of motorized vehicles, bicycles and hit-and-run victims are increasingly widespread, in the last 1 year in Fanindo housing there have been four thefts of children's bicycles. Therefore, a security system is needed in the housing to prevent and monitor things that harm the community, namely in the form of CCTV. The methods carried out in the service include surveying the location to determine the strategic installation point with the local RT head, selecting the type of camera, determining the electrical path, determining the placement of the DVR (Digital Video Recorder), and software settings. This service activity received a very positive response from both the RT management and the local community and is expected to be able to reduce criminal acts such as theft and other criminal acts.
Peningkatan Literasi Keuangan Melalui Peran Galeri Edukasi Investasi Sebagai Media Pembelajaran Pasar Modal Interaktif Siswa/I SMAN 18 Batam Tiara, Tiara; Aprayuda, Riyadi; Kholisa Dinuka, Vina; Wahana Warga Dalam, Winanda; Alif Dzulfiqar, Mohamad; Marcelina Soraya, Iassa; Zainuddin, Muhammad
Owner : Riset dan Jurnal Akuntansi Vol. 8 No. 2 (2024): Artikel Research April 2024
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/owner.v8i2.2133

Abstract

This research aims to provide an overview of increasing understanding of financial literacy and student responses through interactive learning media in the Investment Education Gallery. This research data was collected from 47 participants who participated in structured activities consisting of a pre-test and post-test in the form of true and false questions, then confirmatory questions related to student responses related to the role of the Investment Education Gallery as an interactive learning medium. This research found differences in scores between the pre-test and post-test. The t-test paired samples test shows that the results have significant differences descriptively. The post-test results are higher than the pre-test, meaning that after participating in socialization and mentoring activities in a series of investment education gallery activities, students' understanding has increased; apart from that, students/gave a positive response when following the learning progress as seen from being on a scale of 4, namely strongly agree and know. This research contributes to providing evidence that the role of the Investment Education Gallery in schools can be used as a teaching medium that can directly increase financial literacy, now felt by students at school.
Co-Authors Abdullah Sani Adhe Aryswan Adi Syahputra Purba Agustini, Vera Yuliana Ahmadi Irmansyah Lubis Aprayuda, Riyadi Ari Wibowo Aryeni, Illa Baharudin, Budi Batubara, Ninda Hardina Billi Aldin Sumadireja Budiana, Budiana Budiman Budiman Butar, Hendra Butar Cahyo Budi Nugroho Darmoyono, Aditya Gautama Dija, Nur Rafia Diono, Diono Fajrin, Aulia Fathan Mubina Dewadi Futra, Asrizal Deri Fyona, Annisa Gusnam, Mu'thiana Hasnira Hasnira, Hasnira Hermawan, Muhammad Ghandy Razzaki Husen Ihsan Saputra Iradhat, Achmad Yudha James Siregar Juangsa Putra, Lalu Giat Kamarudin Kamarudin Lalu Giat Juangsa Putra Leo Van Gunawan Mahdaliza, Rahmi Marcelina Soraya, Iassa Maulidiah, Hana Mutialif Mega Gemala Meilani Mandhalena Meilani Mandhalena Manurung Mufariz, Mufti Fathonah Muhammad Andi Nova Muhammad Zainuddin Mulyadi Mulyadi Nabila Ayu Saputri Nugroho Pratomo Ariyanto Nur Fitria Pujo Leksonowati Nur Rafia Dija Nurman Pamungkas Nurul Fadhilah Nurul Laili Arifin Oktani, Dessy Pujo, Nur Fitri Rahman Hakim Reynaldi, Muhammad Ryan Rossbandrio, Wowo Roza Puspita Siregar, James Sriyanto Sriyanto SUSI LESTARI Suyitno, Budhi Muliawan Tiara, Tiara Vina Kholisa Dinuka Wicaksono, Muhammad Jaka Wimbang Winanda Wahana Warga Dalam Windy Stefani Yattawuri Arinta Timur Zaimah, Zaimah