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All Journal The Indonesian Journal of Computer Science Jurnal Teknologi Maritim
Toto Wibowo, Alvalo
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Mechanical Engineering

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Implementasi Sistem Pemantauan Kelayakan Kapal Pada Proses Pengujian Kapal Menggunakan Teknologi Internet of Things Pristovani, Dimas; Abu Jami’in, Muhammad; Singgih Setiyoko, Annas; Toto Wibowo, Alvalo; Leonard, Rikky
The Indonesian Journal of Computer Science Vol. 13 No. 6 (2024): The Indonesian Journal of Computer Science (IJCS)
Publisher : AI Society & STMIK Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33022/ijcs.v13i6.4512

Abstract

A new ship must doing a sea trial inspection before handover to the owner based on International Maritime Organization regulation under Resolution MSC.137. Currently, these inspections are conducted manually. So, the Ship Qualification and Clasification System using Internet of Things (IoT) technology are highly needed. This system made up of hardware connected to an Android application and a web-based application that monitors real-time data on position, speed, inclination, wind speed, and time. Data logger are performed simultaneously on the hardware, Android app, and web-based app, creating redundancy in data logging. In practice, The results of these trials ensure that the ship's technical specifications comply with agreed standards, as well as strengthening the confidence of all parties involved in the testing project. With this success, an IoT-based monitoring and analysis system can be a reliable solution for operational needs and evaluating ship performance
Pengaruh Variasi Temperatur dan Waktu Tahan Post Weld Heat Treatment pada Kekerasan Material A335 Grade P92 untuk Aplikasi Pembangkit Listrik Wahyu Restu, Eriek; Wahyudi, M Thariq; Karim, M; Anggara, Dika; Farrasy, Abiyyuda Putra; Luluk Kusminah, Imah; Toto Wibowo, Alvalo
Jurnal Teknologi Maritim Vol. 8 No. 1 (2025): Jurnal Teknologi Maritim
Publisher : Pusat Penelitian dan Pengabdian Masyarakat Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35991/jtm.v8i1.50

Abstract

A335 Grade P92 steel is a martensitic high temperature which widely-applicated on power plan component with high pressure, therefor it required high tightness. Martensitic properties of material caused the high hardness and easily crack. So, Post Weld Heat Treatment is mandatory for A335 Grade P92 welding. This research analyzed the effect of temperature (705°C, 740°C, and 775°C) and holding time (60 and 120 minutes) of post weld heat treatment to hardness. Hardness test result was decreasing with the increasing of temperature and holding time of post weld heat treatment. Weld metal was obtained the highest hardness on specimen with 705°C of temperature and 60 minutes of holding time of post weld heat treatment with 302,85 kgf/mm2, otherwise the lowest hardness was 285,13 kgf/mm2 on 775°C of temperature and 120 minutes of holding time of post weld heat treatment. Microstructure result was obtained of ferrite, pearlite, and martensite on increasing of temperature and holding time of post weld heat treatment which shown the wider of grain.
Co-Authors Abu Jami’in, Muhammad Dika Anggara Farrasy, Abiyyuda Putra Karim, M Leonard, Rikky Luluk Kusminah, Imah Pristovani, Dimas Singgih Setiyoko, Annas Wahyu Restu, Eriek Wahyudi, M Thariq