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Shanis Irsamayanti
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Journal of Marine-Earth Science and Technology
Published by Institut Teknologi Sepuluh Nopember Surabaya
ISSN : -     EISSN : 27745449     DOI : https://doi.org/10.12962/j27745449
Core Subject : Science,
Earth & Planetary Sciences Energy
In the fast-growing of science and technology of marine-earth related topics, we would like to launch a new international journal entitled MarineEarth Science and Technology Journal (JMEST). This journal is aimed as a media communication amongst scientists and engineers in the fields of marine and earth science and technology and will receive research and technical papers to be reviewed by our editors and reviewers. The JMEST issued three times a year and each issue consists of 5 (five) papers. The scope of the journal includes (but not limited to): Geology, Geophysics, Geochemistry, Atmospheric Science, Environmental Science, Hydrology, Geothermal, Marine Engineering, Marine Technology, Underwater Technology, Marine Renewable Energy
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Teknik Geologi dan Geologi Teknik
Articles 68 Documents
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THE APPLICATION OF COMBINATION OF SOLID BOXES AND AIR BAGS TO SUPPORT THE UNSINKABLE SMALL PASSENGER BOAT R Hetharia, Wolter; R de Fretes, Eliza; Gaspersz, Fella; Louhenapessy, Jandri
Journal of Marine-Earth Science and Technology Vol. 1 No. 1 (2020): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1050.024 KB) | DOI: 10.12962/j27745449.v1i1.154

Abstract

Small fast passenger boats serve to carry passengers at certain routes particularly in short distance between the islands. The passengers preferred those transport modes due to its short travel time. In fact, there are many accidents occur during boat operation which end up with the loss of life and materials at sea. An intensive study was executed by the authors with the purpose to obtain an unsinkable boat. The boat data of existing boats were collected and be used for re-designing process. During the design process, some solid boxes, expanded bags were provided inside boat to reduce the incoming water. Meanwhile, the bags were fitted outside the boat (side floater) to provide additional buoyancy and righting moment for stability performance. A boat model was developed and tested to confirm the design results. In addition, a full-scale boat was developed and equipped with solid boxes, air bags and side floaters. The theoretical computation and extrapolated results from model proved that the required volume for inside solid boxes and air bags are 1.213 m3 and 0.511 m3 respectively. Meanwhile, the required volume of outside air bags is 0.357 m3. It was found that the total boat weight, passengers and incoming water of 4.259 tons are balanced by weight displacement of 5.025 tons. There was reserve buoyancy of 0.766 tons that supports the boat to be float and side floaters to prevent the boat from capsize. The result of sea trial showed that with all loading conditions the boat was still afloat (unsinkable).
COMPUTATIONAL ANALYSIS ON HEAVE AND PITCH MOTIONS PERFORMANCE OF A HYDROFOIL SHIP Fitriadhy, A; Amira Adam, N; Syafiq Zikry, M
Journal of Marine-Earth Science and Technology Vol. 1 No. 1 (2020): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1397.351 KB) | DOI: 10.12962/j27745449.v1i1.156

Abstract

Hydrofoil ship usually experiences high resistance and excessive heave and pitch that may lead to downgrade her seakeeping performance. Therefore, a reliable investigation on prediction of a seakeeping performance of a hydrofoil ship in head-seas is obviously required. To achieve this objective, an analysis of Computational Fluid Dynamic (CFD) approach on hydrofoil ship motion is then proposed. Several parameters such as angle of stern foil and Froude Number have been accordingly taken into account in the simulation, where the fore foil angle is constantly 5 . In general, the results revealed that the increase of the stern foil angle was proportional to the heave motion of the hydrofoil ship. As compared to the magnitude of the stern foil angle of 5 and 10 , the heave motion of the hydrofoil ship has sufficiently decreased at the stern foil angle of 7.5, which leads to have a better seakeeping performance. Furthermore, the subsequent increase of Froude number pointing towards reduction of heave motion, which was inversely proportional to the magnitude of her pitch motion. Inherently, these have led to degrade of the hydrofoil ship seakeeping performances presented in the form of high Response Amplitude Operators (RAO). In general, this CFD simulation is very beneficial to ensure an operational effectiveness of hydrofoil design in high sea states with respect to the aforementioned design parameter.
CHARACTERISTIC OF SPENT BLEACHING EARTH SUBSTITUTION IN LIMESTONE AS LANDFILL MATERIAL Yulikasari, Andriyan; Meidi YT, Nagari; SA, Yusroni; Utama, Widya
Journal of Marine-Earth Science and Technology Vol. 1 No. 1 (2020): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (336.122 KB) | DOI: 10.12962/j27745449.v1i1.157

Abstract

The substitution SBE in limestone can significantly improve the characteristics of limestone as a landfill material, especially in increasing the CBR hardness value without changing the limestone grain size distribution. This is because SBE acts as filler in the SBE-limestone mixture. The existence of SBE in the mixture does not change the value of the mixture plasticity index, because SBE and limestone are both not plastic. SBE material can be used as substitution material (matrix material) up to 30% by weight in the SBE-limestone mixture. The role of SBE as a filler becomes very important in mixed materials for non-limestone structural material requirements, especially for matrix material sizes from 0.4 to 10 mm or sand to gravel. Of course, more research is needed on the physical and mechanical characteristics of mixed materials due to the use of SBE as a filler in matrix multi grand size (sand to gravel).
IDENTIFICATION OF BUILDING DENSITY USING UAV MAPPING METHOD IN CENTRAL KALIMANTAN REGIONAL SETTLEMENT INFRASTRUCTURE Pongdatu, Dennis Euro; Ghozy Salahudin, Kholiq; Mokhamad Nur, Cahyadi; Dwi Anggoro, Primasetya
Journal of Marine-Earth Science and Technology Vol. 2 No. 2 (2021): September
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v2i2.215

Abstract

The increased population density in urban areas has caused buildings density that need to be identified to find out the development and growth of an area that requires clear planning. This research is using aerial mapping method to produce orthophoto area of Garuda - Tingang street. The on-screen digitation was carried out based on the aerial photo data result to determine the number of buildings and the total area of the building. Then, the classification of land cover vegetation and built up land were carried out. From the data processing, 1641 buildings were found on Garuda – Tingang street. The total area of the building is 35,478 hectares. Based on the Decree of the Minister of Public Works No.378/KPTS/1987, Appendix No.22 has a low building density level. The results of the classification state that the vegetation class has a total percentage of 42,969% and the built-up land class has the percentage of 57.031%.
ANALYSIS OF FLOOD DISASTER AREAS, JOMBANG REGENCY, EAST JAVA USING ARCGIS REMOTE SENSING Iswandaru, Yoga Satria Iswandaru; Widodo, Amien; Singgih Purwanto , Moh.
Journal of Marine-Earth Science and Technology Vol. 2 No. 3 (2021): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v2i3.100

Abstract

Flood is one of the natural disasters that occur in Indonesia. Each region in Indonesia has a different flood hazard level. Therefore, a study was conducted to map the level of flood hazard in Jombang Regency, East Java. Remote sensing methods are used to map flood-prone areas, ArcMap software is used to map disaster-prone areas and mapping vegetation density. The data required is in the form of flood data index from Inarisk and Landsat 8 imagery data from USGS. From these data, four maps were generated, namely the vegetation density map and the flood hazard map in the Jombang area. From the vegetation density map, it can be seen from the value it determines the level of vegetation density in the area, while the flood hazard map is categorized into three hazard categories, namely low, medium and high. And it was found that the lower the level of vegetation density, the higher the level of flood hazard in the area, and vice versa and it is also known that the Brantas river affects flooding in Jombang. Then seen from the regional geology, the area of North Jombang absorbs air more quickly because it is composed of karst rocks. Judging from the area of the flood hazard level, the Jombang area is more dominant to the moderate hazard level.
THE FIXED BAFFLE EFFECT ANALYSIS TO FILLING TANKS VARIATION ON THE STABILITY OF 4999 DWT TANKERS Yudo, Hartono; Amiruddin, Wilma; Guna Satriananta, Mahendra; Putra Nur Hidayat, Wahyu
Journal of Marine-Earth Science and Technology Vol. 2 No. 3 (2021): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v2i3.163

Abstract

The tanker is transportation to distribute the results of oil and gas exploration, where most of the exploration results come from the ocean. In this study, an analysis of the effect of adding fixed baffles with a certain number of baffles on the stability of the tanker will be carried out. The method in this study is to analyze the data of 4999 DWT tankers using Maxsurf Stability Software. The simulation was carried out in 4 percentage variations, namely 30%, 40%, 70%, and 90%, with full baffle installation in each tank. After calculating the stability analysis on the 4999 DWT tanker, it was found that the model I tank (without baffles) did not meet IMO standards. While the model II tank (1 fixed baffle), model III tank (2 fixed baffles), and model IV tank (3 fixed baffles) on various fillings have met IMO standards. Where the tank model IV (3 fixed baffles) has the best stability value with a GZ value of 1.881 m at 30% filling, 1.602 m at 50% filling, 1.051 m at 70% filling, and 0.706 m at 90% filling. It was concluded that the addition of a fixed baffle to the tank was effective in increasing the stability of the tanker.
NUMERICAL ANALYSIS SEAKEEPING AND MOTION SICKNESS INCIDENCE (MSI) ON HOSPITAL SHIPS BY ADDING FINS STABILIZER Yasin, M; Ariani, Betty; Chandra Ariesta, Riski
Journal of Marine-Earth Science and Technology Vol. 2 No. 3 (2021): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v2i3.278

Abstract

The development in maritime technology to improve ship performance and operations are growing and diverse. One of the developments carried out is the addition of fin stabilizers to improve ship safety as support for comfort and ships. This research analyzes the effect of variations in the shape of the fin stabilizer on the seakeeping and Comfort Index for Hospital Ships using Maxsurf Modeler software. The parameters used in this research are fins stabilizer Gemini 30, Gemini 50, and modular NR 30. While the variation of ship speed 0, 14, and 18 knots. The direction of the arrival of waves 0, 45, 90, 135, and 180 degrees. Based on data analysis carried out on ship motion, the NR 30 type fin stabilizer is far superior to the others with a maximum value of 4.04- degree roll movement, 0.543- degree pitch movement, and 0.4116 heave acceleration movement. Type NR 30 also has the best comfort on the moderate Motion Sickness Incidence (MSI) Criteria.
LOW-COST LIDAR TLS-100 COMPARISON WITH LIDAR IPAD PRO FOR 3D MAPPING Budisusanto, Yanto; Rizki Ubaidillah, Muchammad; Nur Cahyadi, Mokhamad; Wahyu Imani, Daud; Wahyudi Farid, Imam
Journal of Marine-Earth Science and Technology Vol. 2 No. 3 (2021): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v2i3.430

Abstract

Currently, creating a 3D model of an object has undergone relatively rapid development, especially in technology. Several technologies that can be used to create 3D models are total stations, LiDAR, UAVs, terrestrial laser scanners, and various other products. There are also various methods for obtaining 3D models, such as aerial photogrammetry, close-range photogrammetry, terrestrial, and satellites. This study focuses on comparing the TLS-100 from aerial portraits with the iPad Pro LiDAR product from Apple Inc. The results to be analyzed are the resulting data format, the speed of data retrieval, the quality of the data obtained, and statistical analysis. This study is expected to assist in proving the quality of low-cost LiDAR and iPad Pro LiDAR products.
LAND VALUE PREDICTION MODEL IN THE URBAN FRINGE REGION USING MULTIPLE REGRESSION ALGORITHM Dwi Kisworini, Ita
Journal of Marine-Earth Science and Technology Vol. 2 No. 3 (2021): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v2i3.442

Abstract

The existence of land has become a dream. The value continues to soar over the years, making the land become something that various parties highly desire. This phenomenon causes the demand for land also to continue to increase. This study aims to predict land values based on actual land prices in the field in the form of transaction results and bid prices with a statistical approach for mass valuation in the urban fringe area, where this area is considered an alternative area to overcome the need for housing which is getting higher and higher. Land value is estimated using a data comparison approach market and added to the cost of building construction. Multiple regression is one of the methods to get the best estimation model from big data. The magnitude of the contribution of the influence of the variables making up the Land Value can be known through the coefficient of determination (R2), which is 82.5%. Many factors affect the Land Value, such as Bid Price, Physical Land Factors, Environmental Factors, and Legal Aspects.
IN-SITU EXPERIMENT OF CROSS-FLOW SAVONIUS HYDROKINETIC TURBINE WITH A DEFLECTOR Satrio, Dendy; Wiyanto, Andreas Anthoni; M, Mukhtasor
Journal of Marine-Earth Science and Technology Vol. 3 No. 1 (2022): April
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v3i1.438

Abstract

The crossflow type Savonius turbine is capable to rotate at low current velocity conditions. The drawback of this turbine lies on its efficiency. This study aims to test its performance before implementation in the field. The research method used is an in-situ experimental study in Umbulan, Pasuruan. Turbine model T1 AR 1.145 without deflector is used, when TSR reaches a value of 0.824, it gets a CQ value of 0.327 and a CP value of 0.269. In the same model with deflector, when TSR reaches a value of 1.1, the CQ value is 0.251, and the CP value is 0.276. It can be concluded that this turbine is suitable for area with low current velocity.

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