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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Jurnal Teknik ITS Communication in Biomathematical Sciences International Journal of Marine Engineering Innovation and Research

Brenda M. Samiadji

Department Of Marine Engineering, Institut Teknologi Sepuluh Nopember

Author-ID : 3420169

Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

Published : 8 Documents Claim Missing Document

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Articles

Design of Catamaran Propulsion System with Demihull Distance Variation on Hospital Ship Amiadji, Amiadji; Santoso, Agoes; Sabastian, Bondan
International Journal of Marine Engineering Innovation and Research Vol 1, No 3 (2017)
Publisher : Institut Teknologi Sepuluh Nopember

Various problems faced by health services in the area of remote islands based on survey data Ministry of Health, that limited human resources in health and treatment facilities, as well as the difficult geographical conditions causing problems transport and communication are the main problem. From the above, the problems faced by means of a mobile hospital in the form of vessels operating from one small island to another small island is the solution of health problems for the people living within the island of MaduraIn this thesis the work will be done planning catamaran ship propulsion system with a variety of distances and determine the power demihull hospital equipmen. From the calculation results in a variation within demihull get with B = 19.51 m, 0,1B = 21.46, 0,2B = 23.41, 25.36 resulting 0,3B = 97.8 kN after the engine power of 812.71 kW obtained. From the selection of the engine 10 criteria obtained type Caterpillar 3508B engines.Power generators are required for a hospital ship is 75kW for 4 gensets.

Analisis Struktur Overhead Crane Kapasitas 35 Ton Zainul Imam; Amiadji Amiadji Amiadji; Irfan Syarif Arief
Jurnal Teknik ITS Vol 3, No 1 (2014)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

PT Badak Natural Gas Liquefaction atau lebih dikenal dengan PT Badak NGL adalah perusahaan penghasil gas alam cair / LNG (Liquid Natural Gas) terbesar di indonesia dan salah satu kilang LNG yang terbesar di dunia. Perusahaan ini berlokasi di Bontang, Kalimantan Timur, dan memiliki 8 proses train (A – H) yang mampu menghasilkan 22,5 Mtpa LNG (juta metrik ton LNG per tahun). PT Badak NGL merupakan salah satu penyumbang devisa terbesar bagi kota Bontang maupun Indonesia. Selain dilengkapi dengan train, PT Badak NGL juga dilengkapi dengan pompa yang digunakan untuk proses bongkar muat muatan. Sehingga, diusahakan pompa – pompa selalu dalam kondisi yang baik agar tidak mengganggu proses bongkar muat. Train dan pompa berada pada satu lokasi di daratan. Train digunakan untuk mengangkat beban pompa – pompa yang mengalami kerusakan untuk diperbaiki. Train harus dapat mengangkat beban pompa – pompa sebesar 35 ton. Sehingga kapasitas beban train harus dapat menahan beban pompa. Berdasarkan hasil simulasi dan analisa kekuatan train, train yang mengalami kondisi kritis tidak dapat menahan beban pompa pada bagian train I – J. Hasil simulasi dan analisa menunjukkan nilai rata - rata axial stress +34 Mpa dan -61 Mpa; displacement maksimal 128 dan minimal 0; strain maksimal 0,00074 dan minimal 0; sedangkan factor of safety sebesar 0,55.

Analisa Pengaruh Sudut Serang Hidrofoil Terhadap Gaya Angkat Kapal Trimaran Hidrofoil Aji Suryadi; Irfan Syarif Arief; Amiadji Amiadji
Jurnal Teknik ITS Vol 5, No 2 (2016)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Indonesia merupakan negara maritim, namun sebagian besar masyarakat Indonesia masih menggantungkan hidupnya pada sektor agraris. Sektor maritim perlu dikembangkan dan kendaraan laut sangat dibutuhkan sebagai fasilitas untuk mengembangkan sektor maritim. Pengembangan efisiensi kerja kapal bisa dilakukan dengan penambahan komponen hidrofoil yang dipasang pada lambung kapal Trimaran. Prinsip kerja dari hidrofoil yang terpasang pada lambung kapal Trimaran adalah hidrofoil yang memiliki sudut serang akan bergesekan dengan aliran sehingga menghasilkan gaya hambat kapal searah sumbu-X dan gaya angkat kapal searah sumbu-Y. Pada penulisan tugas akhir ini penulis menganalisa mengenai pengaruh sudut serang hidrofoil terhadap gaya angkat kapal Trimaran Hidrofoil. Sudut serang divariasikan sebesar 100, 200 dan 300 dengan Analisa menggunakan metode Computational Fluid Dynamics (CFD). Penelitian menghasilkan kesimpulan bahwa sudut serang terbaik berbeda-beda pada tiap kecepatan. Kecepatan 20 knot memiliki sudut serang hidrofoil terbaik sebesar 30 derajat. Kecepatan 30 knot memiliki sudut serang hidrofoil terbaik sebesar 20 derajat. Kecepatan 40 knot kapal sudah mencapai kondisi stall dimana kapal hidrofoil sudah kehilangan gaya angkat.

Investigating the Impact of Social Awareness and Rapid Test on A COVID-19 Transmission Model Muhammad Afief Balya; Bunga Oktaviani Dewi; Faza Indah Lestari; Gayatri Ratu; Hanna Rosuliyana; Tama Windyhani; Zawir Rifqa Fadhlia; Brenda M. Samiadji; Dipo Aldila; Sarbaz H. A. Khoshnaw; Muhammad Shahzad
Communication in Biomathematical Sciences Vol. 4 No. 1 (2021)
Publisher : Indonesian Bio-Mathematical Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/cbms.2021.4.1.5

In this article, we propose and analyze a mathematical model of COVID-19 transmission among a closed population, with social awareness and rapid test intervention as the control variables. For this, we have constructed the model using a compartmental system of the ordinary differential equations. Dynamical analysis regarding the existence and local stability of equilibrium points is conducted rigorously. Our analysis shows that COVID-19 will disappear from the population if the basic reproduction number is less than one, and persist if the basic reproduction number is greater than one. In addition, we have shown a trans-critical bifurcation phenomenon based on our proposed model when the basic reproduction number equals one. From the elasticity analysis, we have observed that rapid testing is more promising in reducing the basic reproduction number as compared to a media campaign to improve social awareness on COVID-19. Using the Pontryagin Maximum Principle (PMP), the characterization of our optimal control problem is derived analytically and solved numerically using the forward-backward iterative algorithm. Our cost-effectiveness analysis shows that using rapid test and media campaigns partially are the best intervention strategy to reduce the number of infected humans with the minimum cost of intervention. If the intervention is to be implemented as a single intervention, then using solely the rapid test is a more promising and low-cost option in reducing the number of infected individuals vis-a-vis a media campaign to increase social awareness as a single intervention.

Development of Cutter Head Design in Cutter Suction Dredger with Thickness and Pitch Variation Amiadji Amiadji; Achmad Baidowi; riyan prayogo
International Journal of Marine Engineering Innovation and Research Vol 3, No 3 (2019)
Publisher : Institut Teknologi Sepuluh Nopember

The need for dredgers for the shallow water in the sea with a very high level of siltation on the coast of Indonesia is a factor worth considering. For example, coastal areas in Ujung Pangkah sub-district, Gresik district, East Java province. The choice of the area is due to the many institutions and corporations that are back and forth utilizing these waterways. But the main obstacle to making a Cutter Suction Dredger (CSD) is almost all the equipment needed is imported, for example, the main equipment is the cutter head. Therefore looking at the needs, economics and technology factors, this paper will discuss the cutter head design. Available data is a request from the owner, 40KW power cutter head; 1000mm cutter diameter; 30rpm rotation. The force distribution given 5950 N is in accordance with the dredging condition which is to have a strong material tension to be estimated to work at a relatively Soft density of <100 Mpa and Medium around 100Mpa - 170Mpa. The expected results of this design are to obtain a proportional design before the production process and to function at a minimum according to specifications. The usefulness of this design really hopes to be followed up to the production stage and can be applied.

Technical Analysis of Kort Nozzle Application for SPOB Ship 4990 DWT on River Tony Bambang Musriyadi; Amiadji Amiadji; Bayu Sukma
International Journal of Marine Engineering Innovation and Research Vol 1, No 3 (2017)
Publisher : Institut Teknologi Sepuluh Nopember

Propeller is a locomotor shaped vanes are used to drive ships, and also propellers which serves to move tehaga by changing the turning force of the propeller thrust menggerakakan into the vessel. In increasing the value of the thrust to be generated that is by applying the kort nozzle propeller. The method used in this study using CFD (Computional Fluid Dynamic), and the variation is from the conventional propeller models, with a kort nozzle propeller type kort nozzle type 19A and 37. Based on the findings that the kort nozzle propeller with the addition of the value of the thrust , propeller efficiency and torque generated. The driving force value is by using kort nozzle propeller type 37 amounted to 349.27 kN.

Efficiency Analysis of Additions of Ice Flake in Cargo Hold Cooling System of Fishing Vessel Amiadji Amiadji; Edi Jadmiko; Yosef Novian Prasetyo
International Journal of Marine Engineering Innovation and Research Vol 1, No 3 (2017)
Publisher : Institut Teknologi Sepuluh Nopember

As a maritime nation, the majority of people's livelihood in Indonesia coast is as a fishermen. The process of preserving fish after being caught will determine how good the product quality. One of process on preserving fish that can be done is to perform the cooling process using a cooling machine on board. Refrigeration system certainly requires high electrical power consumption. That high power usage can be reduced as much as possible, one of which is to add chopped ice (ice flake) on a fishing boat cargo space. So that the load for cooling can be reduced.The purpose of this thesis is to find out how the influence of the addition of ice flake on cooling load in the cargo hold of fishing vessels, and to know how much power is used when the cooling machine is combined with the addition of ice flake. In this analysis cooling load calculation refers to the standard ISO 7547.from the results of analysis found that the addition of ice flake on cargo space can reduce cooling load and can reduce electricity consumption day in the main vessel for the addition comparison flake ice and fish weight of 1: 1.

CFD Based Analysis of Resistance and Pitch Motion of Novel Flat Plate Panel Hull Vessel Amiadji Amiadji; achmad baidowi; Irfan Syarief Arief; Fitricia Putri Ricinzky
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 19, No 1 (2022): February
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v19i1.43370

This paper provides analysis regarding a phenomenal hull shape called flat panel concept, the flat panel hull is an axe bow vessel at the front part and semi trimaran at the stern part. This concept is for a small vessel such as fishing vessels, patrol vessels and prototypes have been built. Resistance and motion is important part of a vessel design, this paper compares a flat plate vessel with 282.56 ton displacement with a conventional vessel with the same displacement and same speed. The resistance comparison was conducted using Computational Fluid Dynamic (CFD) on each ship with a speed range of 5-10 knots of operational speed. The resistance shows that the flat panel vessel generates higher resistance compared to the conventional vessel where the difference varies from 8.388% to 19.954% depending on the speed. It also found that the pitch motion (Ry) of flat panel vessel is positive that indicates the bow draft is lower during the simulation in calm water. The highest value of pitch is 1.13 degrees measured at the amidships or zero point or -0.3 m at the bow. Two While the relative velocity or flow analysis indicates that flow of the flat panel vessel has enormous turbulence flow around the stern hull and smoother flow pattern at the bow, this may cause the increase of resistance and bow diving in calm water phenomena. However since the most accurate test is based on model test in hydrodynamic laboratory, it is recommended to conduct the comparison experiment in hydrodynamic laboratory.

Co-Authors Achmad Baidowi, Achmad Agoes Santoso Aji Suryadi Balya, Muhammad Afief Bayu Sukma Bondan Sabastian Bunga Oktaviani Dewi Dipo Aldila Edi Jadmiko Faza Indah Lestari Fitricia Putri Ricinzky Gayatri Ratu Hanna Rosuliyana Irfan Syarief Arief Irfan Syarif Arief Muhammad Shahzad riyan prayogo Sabastian, Bondan Sarbaz H. A. Khoshnaw Tama Windyhani Tony Bambang Musriyadi Yosef Novian Prasetyo Zainul Imam Zawir Rifqa Fadhlia

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