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All Journal Jurnal Teknik ITS Applied Technology and Computing Science Journal International Journal of Marine Engineering Innovation and Research Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Ede Mehta Wardhana
Departemen Teknik Sistem Perkapalan Institut Teknologi Sepuluh Nopember
Aerospace Engineering Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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Flood Rescue Boat as One of the Alternatives in Indonesia Waterways Meitha Soetardjo; Ede Mehta Wardhana; Ahmad Bisri
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 63 No 3 (2019): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1127.456 KB) | DOI: 10.36842/jomase.v63i3.127

Abstract

Flooding is the most frequent disaster that hit Indonesia, especially in big cities with poor urban planning. Infrastructure damage has occurred, the fatalities which are likely to occur, both during floods and after floods. So far, the fatalities caused by floods are very difficult to control and even tend to increase. This condition is getting worse with the lack of facilities that support the evacuation process of flood victims. The aim of the study was to design a lifeboat that was able to evacuate flood victims and be able to overcome other problems that might arise when the evacuation process runs more efficiently. By collecting data from several agencies related to flood mitigation problems, interviews with experts, as well as several other references, it is hoped that relevant data can be collected, which can provide solutions to the problems faced. The stages of the research included the creation of concepts and the design of a hull shape that was adjusted for a flood rescue boat, a boat with high stability. By using of the Maxsurf V.8.5 and Hydromax V.8.5 program, it is expected that the design process and calculation of boat stability can be done more quickly and accurately. The results of research for several areas affected by floods, the existence of a rescue boat as a means to evacuate victims is urgently needed. So that the provision of a multifunctional flood rescue boat is the perfect solution to overcome this problem. To carry out this function, the stability of the rescue boat flood is one of the factors that must be considered so that the evacuation process can be carried out safely
Optimizing Ocean Energy Harvesting: The Significance of Natural Frequency in Piezoelectric Generator Device Electrical Output Ede Mehta Wardhana; Meitha Soetardjo; Semin Semin; Agoes Santoso; Sutopo Purwono Fitri
International Journal of Marine Engineering Innovation and Research Vol 8, No 4 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i4.19258

Abstract

This study explores the significance of the natural frequency parameter in enhancing the electrical performance of a piezoelectric generator device, mainly when deployed in ocean energy harvesting. While natural energy harvesting aims to establish affordable and sustainable renewable energy sources, piezoelectric devices capitalize on the inherent piezoelectric effect derived from natural movements. Despite the abundance of constant natural movements in the Earth's environment, the application of piezoelectric devices in ocean energy remains relatively understudied. The experimental setup involves a cantilever-designed piezoelectric device made from polyvinylidene fluoride (PVDF). The study investigates the relationships between vibration frequency, initial distance, and electrical output. Findings indicate that higher setup parameters may lead to increased electrical output, but the relationship is not linear. Notably, the resonance between the vibration frequency and the device's natural frequency emerges as a critical factor in optimizing electrical performance. Detailed experimentation, visualized through figures and graphs, demonstrates the nuanced interplay of setup parameters and electrical output. The study emphasizes that the initial distance, while important, does not singularly determine the device's electrical performance. It challenges conventional beliefs by showcasing that piezoelectric devices can operate efficiently in tight spaces. Furthermore, the study delves into the non-linear relationship between vibration frequency and electrical output. Examining natural and resonant frequencies reveals that resonance occurs most prominently at the device's natural frequency, emphasizing the importance of precise tuning for optimal performance. The findings offer valuable insights for the strategic deployment of piezoelectric technology in ocean energy harvesting, paving the way for more efficient and effective devices in real-world conditions
Co-Authors Agoes Santoso Agoes Santoso Ahmad Bisri Ahmad Bisri Alam Baheramsyah Alam Bahermasyah Asep Rahmat Ramdani Hario Pramudito Hilmy Yassar Juda Imanuel Osvaldo Panggabean Meitha Soetardjo Meitha Soetardjo Meitha Soetardjo Muhammad Abidin Abidin Muhammad Azis Husein Nasa dityas Fariz Pradani Puteri Ladikha Sihombing Ribhi Naufal Azmi Semin Semin Sutopo Purwono Fitri Taufik Fajar Nugroho Wolfgang Busse