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All Journal Journal La Multiapp Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Maritime Park: Journal Of Maritime Technology and Socienty Sewagati
Silvianita, Silvianita
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Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Education Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Public Health Social Sciences Other

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Optimalisasi Potensi Eco-Wisata Susur Sungai Kejawan Putih Tambak Kecamatan Mulyorejo Surabaya Timur Frestiqauli, Santi; Sujantoko, Sujantoko; Murdjito, Murdjito; Djatmiko , Eko Budi; Mustain, Mahmud; Dhanistha, Wimala Lalitya; Silvianita, Silvianita; Rahmawati, Shade
Sewagati Vol 9 No 1 (2025)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v9i1.2436

Abstract

Eco-wisata Susur Sungai Kejawan Putih Tambak terletak di kecamatan Mulyorejo, Surabaya Timur. Merupakan lokasi wisata alam yang menyediakan pengalaman menyusui sungai menggunakan sampan/perahu nelayan dengan menyugguhkan pemandangan mangrove hingga pemandangan jembatan Suramadu. Diresmikan pada Kamis, 27 Juli 2023 oleh walikota Surabaya Eri Cahyadi. Wisata susur sungai di kawasan Kejawan Putih Tambak menjadi salah satu pilihan wisata air di Kota Surabaya. Selain sebagai sarana wisata, tempat itu juga untuk menunjang perekonomian masyarakat, khususnya bagi para nelayan di Kejawan Putih Tambak. Menurut walikota Surabaya ketika terdapat susur sungai, secara otomatis sepanjang sungai itu harus terjaga kebersihan dan keindahannya. Namun, hingga pada saat ini (2025) wisata susur sungai masih sepi peminat. Hal ini bisa disebabkan oleh beberapa faktor, terutama pada infrastruktur penunjang. Oleh karena itu, dengan adanya pengabdian masyarakat ITS, optimalisasi potensi wisata susur sungai Kejawan Putih Tambak dilaksanakan untuk mengatasi keterbatasan infrastruktur yaitu dengan melakukan pendampingan desain pengembangan dermaga baru dan menghasilkan peta wisata susur sungai. Program ini sebagai wujud keberlangsungan komunitas yang berdampak pada masyarakat, lingkungan darat dan perairan
Numerical Study on the Fluid Forces of a Rigid Cylinder Covered by Helical Rods with Gap Due to the Variations of Incoming Flow Direction and Pitch at Reynolds Number 1000 Syarifuddin, Arief; Prastianto, Rudi Walujo; Silvianita, Silvianita
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 16 No 1 (2015): 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 | DOI: 10.36842/jomase.v16i1.459

Abstract

Offshore structures such as a jacket platform, risers, conductors, mooring lines, Spars, and pipelines, are subject to severe vibration due to Vortex-induced vibration (VIV). This vibration can lead the structures to fatigue failure. One of a passive suppression device which effectively reduces the VIV is in the form of triple helical rods with gap covered to a cylinder. The present paper specially discusses the influence of incoming flow direction and pitch of helix on the induced fluid forces acting on the cylinder due to addition of helical rods at Reynolds number (Re) of 103. The configuration produced best reduction on drag and lift forces in CFD simulation are with 30D length of pitch for the incoming flow direction of 0° and 60°. Reduction on the drag and lift forces for incoming flow directions of 0° and 60° are respectively, 11.34% and 88.32%, and 10.99% and 97.94%.
Acceleration of Modular Oil and Gas Project Duration Using the Time-Cost Trade-Off Method Iqbal, Muhammad Bob; Silvianita, Silvianita
Journal La Multiapp Vol. 6 No. 5 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i5.2307

Abstract

Floating Production Storage and Offloading (FPSO) is an offshore floating platform designed to process and store oil Floating Production Storage and Offloading (FPSO) is a type of floating offshore platform that functions to process and store oil and gas before being distributed to consumers. A critical component of the FPSO, designed to ensure the product can be safely processed and transported, is the topside module. Currently, the Seawater Filtration Module project is facing delay challenges that impact both project cost and completion time. Using the existing case study, this research applies the Critical Path Method (CPM) to identify the critical path within the overall project schedule, as well as the Program Evaluation and Review Technique (PERT) to manage uncertainties in the completion time of critical activities. To evaluate the acceleration strategy with consideration of additional costs, the Time-Cost Trade-Off (TCTO) method is employed. The research findings indicate that the project experienced a 51-day delay from the original schedule, which targeted completion by January 31, 2024. A total of 11 activities were identified as part of the critical path contributing to the delay. To address this issue, acceleration was carried out by adding labor based on the productivity of each activity. The results show that the addition of 17 workers successfully reduced the duration of critical activities from 721 days to 670 days. Probability analysis indicated a success rate of 82.64% for the acceleration effort. Meanwhile, the cost calculation showed that the acceleration required an additional expense of Rp 30,913,709.
Risk Analysis of Hot Working in Confined Space Using Confined Space Risk Analysis (CRSA) and Bowtie Analysis Method on LPG Tanker Repair Process Dhanistha, Wimala L; Silvianita, Silvianita; M, Roshi
Maritime Park: Journal of Maritime Technology and Society Volume 2, Issue 1, 2023
Publisher : Department of Ocean Engineering, Faculty of Engineering, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/mp.v2i1.25486

Abstract

Confined space is a room that is large enough and has a configuration in such a way that workers can enter and do work in it. In the ship repair process it is not uncommon to do it in a confined space area. . The purpose of writing this final project is to identify hazards and carry out risk assessments in hot working in confined spaces in the LPG tanker ship repair process so that the dominant hazard is obtained, the causes and consequences of the dominant hazard are identified, and the right dominant risk control can be identified. This study begins with the identification of the characteristics of confined space on ships by grouping them into 7 risk categories of confined space. Then carry out risk identification by explaining the components of a risk, including: types of hazards, dangerous work, dangerous events and the consequences that can occur. After that, an initial risk assessment was carried out for hot working in confined spaces on ship repairs presented in matrix form. After that, risk control is carried out and the final risk reassessment for hot working in confined space on ship repair is carried out by continuing the matrix that was previously made. In the final stage, an analysis is carried out using the bowtie method to analyze the causes, impacts, and controls of these risks.
Co-Authors Dhanistha, Wimala L Dhanistha, Wimala Lalitya Djatmiko , Eko Budi Frestiqauli, Santi Iqbal, Muhammad Bob M, Roshi Mahmud Mustain Murdjito Murdjito Rudi Walujo Prastianto Shade Rahmawati Sujantoko Sujantoko Syarifuddin, Arief