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Subagio Soim
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Flood Detection Using Backpropagation Neural Network Method Ani Dwi Ratnasari; Hasin, Khoirul; Subagio Soim; Setiawan, Bambang Teguh; Afif Zuhri Arfianto
Indonesian Journal of Engineering Research Vol 3 No 1 (2022): Indonesian Journal of Engineering Research
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/ijer.v3i1.40

Abstract

Lack of river and watershed management will cause problems and disasters. One of it is the flood that can cause physical, social and economic loss. So countermeasures or flood anticipation are needed by using the Early Warning System (EWS) to provide early information if a flood is going to occur. This study uses five input indicators: temperature, humidity, water discharge, water surface altitude and rainfall data that will produce output in the form of notifications and alarms for the Early Warning System (EWS). Then the input and output data configuration will be processed using a Backpropagation Neural Network. Data used is data recorded in real-time on the research object for two weeks with the composition of training and testing data with a percentage of 80% and 20%. The best backpropagation neural network model used has the input of 5 neurons layer architecture, 15 neurons as the hidden layer and three neurons as the output layer. The flood prediction result uses the Backpropagation Neural Network method, has an RMSE score performance of 2.16e-21 and a percentage success testing system of 91.33%. It shows that the model has an excellent accuracy level.
KAJIAN EKSPERIMEN PENGARUH PEMASANGAN SILINDER SIRKULAR DENGAN DIAMETER SILINDER 16 CM DAN JARAK 20 CM PADA SISI ADVANCING BLADE TURBIN AIR SAVONIUS Deni Purnanto; Subagio Soim; Priyo Agus Setiawan
Proceedings Conference on Marine Engineering and its Application Vol 3 No 1 (2020): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

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Abstract

Savonius turbine for the first time was founded by Sigurd Johannes Savonius in 1922. This turbine hasvertical axis and half-round shaped on each side of blades and like an “S”. This turbine aslo called as drag turbinebecause it need drag force on its blades to whirling the turbine. Many research were done to increasing theperfomance of this turbine and one of them was using deflector plate in front of the turbine. On this experiment,the method is using distance and diameter of circular cylinder variations. The turbine for this experiment usingmyring equation with n=1 for the blades shape. Dimension of the turbine is 400 mm in height and 400 mm indiameter. The diameter of circular cylinder (ds) is 16 cm and the distance (A) is 20 cm used in this experiment.The result obtained in this experiment showing that the highest value of Ct is 0,3038 at TSR 0,633 with increasedpercentage is 7,955%. The highest Cp value is 0,1924 at TSR 0,633 with increased percentage is 20,828%.
ANALISIS PERFORMA SISTEM PROPULSI PADA KAPAL SPOB AKIBAT PERGANTIAN GEARBOX Wendhy Yozam; Abdul Gafur; Subagio Soim
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2668

Abstract

In this final project, the performance of the propulsion system on the ship is analyzed SPOB.Sultan Samudera. With This is done to minimize errors in the selection or determination of gearboxesand other engines. The methods used are Engine Propeller Matching and Speed Power Predictionwhich will be compared with the sea trial report. Calculation of ship resistance is done manually usingthe Holtrop method at a speed of 10 knots, the results of engine propeller matching are used todetermine the Match Point obtained, based on the calculation of the resistance obtained by the ship'sresistance value Rt = 91.045 Kn. The power requirements obtained are 1658,000 HP on the 2 MainEngines used and 817,694 HP per engine based on the main engine that has been determined. Then thePropeller type is Ka 4-70 with P/Db 1.100 meters and propeller efficiency (?) 0.561, the propeller doesnot cavitate and the match point in rough hull conditions against Gearbox Ratio 7.42: 1 occurs at88.96% at 1900 rpm while at Gearbox Ratio 5: 1 rough hull conditions occurred at 290.74% at 1900rpm, then in the Speed Power Prediction conditions compared to the Sea Trial "Against the Current"at a speed of 8.8 knots, the match point was obtained at 1600 rpm at 8.1 knots, while at Gearbox Ratio5: 1 with a speed of 8.8 knots obtained a meeting point at 1160 rpm engine speed at 6.4 knots withknown Sea Trial results, so the Gearbox Ratio of 7.42: 1 is quite close to the actual data owned by thecompany with the calculations obtained.
RANCANG BANGUN MODIFIKASI PAD EYE PADA GALANGAN Maulana Muslim Dianto; Budi Prasojo; Subagio Soim
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2680

Abstract

The function of the pad eye provides a point where the pulley can be hooked directly accordingto the design. The pad eye is installed by welding on the desired area. In the process of installing the padeye, there are obstacles experienced, for example in the installation of the pad eye which takes time dueto the improper welding and welding process. The pad eye modification was carried out to make it easierto do the installation quickly. The pad eye modification has a clamp that can be adjusted in widthaccording to the support. The first step of this pad eye modification is modeling to find out the appropriatedesign on the support, after which material selection is carried out. Followed by the calculation ofallowable stress, tensile and shear. After the calculation results meet the safety criteria, proceed withtesting the pad eye modification using a load cell. The calculation obtained is the largest tensile stress of18.387 MPa, the largest shear stress of 45.969 MPa of the two stresses compared to the permit stress of72 MPa, so it can meet the safety criteria. The bolt strength value is 7.661 MPa from these resultscompared to the permit voltage of 60 MPa. The calculation results show that the pad eye modificationconstruction meets the safety criteria. In strength testing, it is concluded that the pad eye modification isable to lift loads from 500kg to 1500kg.
Co-Authors Abdul Gafur Ani Dwi Ratnasari Arfianto, Afif Zuhri Bambang Teguh Setiawan Budi Prasojo Deni Purnanto Hasin, Khoirul Maulana Muslim Dianto Priyo Agus Setiawan Wendhy Yozam