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Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)

jomase
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Published by Universitas Riau

ISSN : 23547065 EISSN : 25276085 DOI : http://dx.doi.org/10.36842/jomase

Aerospace Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering

The mission of the JOMAse is to foster free and extremely rapid scientific communication across the world wide community. The JOMAse is an original and peer review article that advance the understanding of both science and engineering and its application to the solution of challenges and complex problems in naval architecture, offshore and subsea, machines and control system, aeronautics, satellite and aerospace. The JOMAse is particularly concerned with the demonstration of applied science and innovative engineering solutions to solve specific industrial problems. Articles preferably should focus on the following aspects: new methods or theory or philosophy innovative practices, critical survey or analysis of a subject or topic, new or latest research findings and critical review or evaluation of new discoveries. Scope The JOMAse welcomes manuscript submissions from academicians, scholars, and practitioners for possible publication from all over the world that meets the general criteria of significance and educational excellence. The scope of the journal is as follows: Naval Architecture and Offshore Engineering Computational fluid dynamic and Experimental Mechanics Hydrodynamic and Aerodynamics Noise and Vibration Aeronautics and Satellite Engineering Materials and Corrosion Fluids Mechanics Engineering Stress and Structural Modeling Manufacturing and Industrial Engineering Robotics and Control Heat Transfer and Thermal Power Plant Engineering Risk and Reliability Case studies and Critical reviews

Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)

Articles 329 Documents

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Benefits of Menaming Dams and the Potential of Irrigation Canals as a Source of Power Generation Yuli Handika Hasyim; Asral Asral
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 65 No 3 (2021): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

The difficult location access and a small population can cause lack of electricity from PLN (State Electricity Company). One alternative that can be done is to use irrigation canals as a source of generation. In this study explained the social conditions of the community, the function of dams for the community and the potential of irrigation canals as a source of power generation. A case study was conducted in the Menaming Village in Riau Province. Menaming dam is one of the dams that have two main irrigation channels that can be used as a source of power generation. A quantitative descriptive method was used in this study. The results of the survey conducted by observing directly, questionnaires and data collection showed that Menaming dam was very beneficial for the Menaming’s community. Menaming dam is used as a source of water for rice fields and community ponds, access to community plantation land, fishing grounds and as a tourist attraction. Based preliminary study in Menaming dam was discovered the hydraulic water power in irrigation canals amounted to 1,330 watts. Therefore, it can be used as a source of power generation to meet the electricity needs of a simple house.

Mechanical Technology Prototype Innovation of Computer Numerical Control from Electric Apparel as A Medium for Education Laka, Oktafatahna; Sudariyanto, Sudariyanto; Dapa, Anju Pritia
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 58 No 1 (2018): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

E-waste is a waste in the form of electronic devices that are not used anymore. One example is the personal computer components (PCs) that have been damaged or already left as an old technology that it can be no longer used. So far, e-waste PCs have not been widely used or recycled for more useful purposes, so its existence tends to be a waste that has the potential to cause pollution. Based on these conditions, it is necessary to do a research for e-waste PC can be processed and reused, one of which can be used as machine prototype computer numerical control (CNC) with three axis which can then be used as a medium for studies. This research begins by designing the physical form of a 3 axis CNC machine with the software Autodesk Inventor device. Then, it was made a prototype machine that part of its components taken from the former PC unused components. As a driving force, the prototype CNC machine used stepper motor combined with Arduino UNO Microcontroller based control system. This machine is then operated with a PC using Universal G-Code Sender and GRBL (Coding Gate) based CNC programming system. With a working area of 42 mm x 42 mm and a 17 mm depth of feed, the prototype CNC machine can eventually be used as a study medium for schools that do not have CNC machines due to their high cost and high maintenance costs.

Controlled Dip Reactor Design to Increase Bakterioselulosa Produce Based on ATMega8535 Microcontroller Amri, Rahyul
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 56 No 1 (2018): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Contact with O2 and at the same time ability to absorbent of nutrient will be very determining of productivity level of bakterioselulosa. On that account, for the scale up production, there are some done efforts, like Rotary Disc Reactor (RDR), as developed by Norhayati [1]. The RDR is unable to rotate less than 7 rpm (equivalent 10 second to every rotation). At this research, weakness of the rotary disk bioreaktor was overcome by developing Controlled Dip Reactor (CDR). Excess of proposed appliance is user can arrange the the duration submerged phase in growth liquid medium and exposed to the air phase as according to experiment design, so that more effective and be free to to gain time optimum to each the phase utilize to get maximal production of bakterioselulosa. At the testing, designed appliance can lift place grow medium of bakterioselulosa toward as high as 15 cm meaning exposed to the air,and degrade place grow of bakterioselulosa medium downwards until 1 cm measured from medium place base, which mean bakterioselulosa submerged liquid of the growth medium and the time exposed to the air and exposed to the liquid can be controlled to vary from 1 until 20 minute.

Correlation Analysis of Quality, Ability and Performance of Information Technology Usage on Registration Section of RSI Siti Rahmah Padang, Indonesia Yanti Desnita Tasri
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 64 No 3 (2020): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Patient care in the registration section of the hospital is a very important activity, because there is a recording of patient data that will be used by other health workers in providing further health care. The use of information technology in the registration section can increase work effectiveness and efficiency and produce accurate information. For this reason, it is necessary to analyze the factors that affect the benefits of using information technology in the registration section. This study aims to examine the relationship between the quality of information systems, the ability of officers and the performance of information users at RSI Siti Rahmah Padang, Indonesia. The research was conducted with survey method and data analysis using a quantitative approach. From the research results, it was found that the quality of information systems did not affect the benefits of using information technology. Meanwhile, the ability and performance of officers affect the benefits of using information technology. It is suggested that the scope of the use of information technology in the medical records section be increased. It is necessary to increase the ability of officers in the use of information technology by holding training or workshops.

Making roundness measurement applications and control systems on the Roundness Tester Machine Dodi Sofyan Arief; Eko Jadmiko; Adhy Prayitno; Muftil Badri; M. Dalil
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)

Dial indicator is a comparison device usually used in industrial activities, especially in production. To make measurements at this time must be supported by technology that can facilitate operators when using it and when analyzing measurement results. Involving the programme and microcontroller are a solution to developing in roundness measurement, and then the results can be more accurate or thorough between the readable values read from the measuring instrument with the actual value of varying the amount of data. Roundness application is a program that can input measurement data automatically and can do calculations directly. Then, it can display a reference circle, a table that calculates the values of X, Y, R, X’, Y’, R’, Roundness Deviation, Run out Concentricity or a shift in the center point and also the center point shift or Theta. In measuring roundness, the test object is used the Standard Mandrel which has been certified by PT. Global Quality Indonesia, by determining three points or positions, namely in the first position the amount of data is 180, in the second position the amount of data is 90 and in the third position, the amount of data is 60 with a rotating speed of 15 mm/s. The results of the reference circle can be seen in each calculation in each position, in the second position the roundness deviation values are approaching of the Mandrel.

Investigation of Mixture of Epoxy Resin/Palm Kernel Shell as Insulation Murdiya, Fri
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 43 No 1 (2017): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Palm kernel shells have a high mechanical strength and good insulation strength. From these results it can be concluded that breakdown voltage of epoxy resin/palm kernel shells is higher than pure resin or resin/alumina. The highest breakdown voltage that occurred in the resin/palm kernel shells (8 wt%) is 76 kV. While the highest breakdown voltage that occurred in the epoxy resin/alumina (17 wt%) is 57.15 kV. Breakdown voltages of both samples are higher than the pure epoxy resin of 36 kV. The maximum electric field density (Emax) in the pure resin is 0.24 MV/cm that is lower than the resin/palm kernel shell (8 wt%) of 0.51 MV/cm and the resin/alumina (17 wt%) of 0.38 MV/cm. Discharge current has a lot of pulses and high amplitude when all solid insulation approached the breakdown event. However, the current pulses in the pure resin are higher than in both resin/palm kernel shell and resin/alumina. The epoxy resin mixture with palm kernel shells can be used as a new solid insulator.

Numerical Modeling of Sediment Transport Rate and Shoreline Changes of Jazireh-e Shomali-Jonoubi Port in the Persian Gulf Milad Bamdadi Nejad; Mohammad Javad Ketabdari; Farhad Shojaei
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 64 No 2 (2020): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Studying the sediments and predicting the coastal morphological changes have wide applications in coastal engineering, including coastal management, operation, and design of the structures as well as their maintenance, development, and expansion of coasts and coastal structures, which are of paramount importance. This study aims to model the shoreline changes around the Jazireh-e Shomali-Jonoubi Port, calculate the amount of advancement and recession due to the construction of the breakwater, and to determine the areas exposed to erosion and sedimentation. To this end, a series of primary information, including aerial and satellite images, hydrographic and topographic maps, and the specifications and grading of the sediment of the considered coast, has been collected and the overall morphology of the area has been determined. The input data into the model include a 12-year time series of the wave (height, period, and direction of the wave) and the wave climate. The length of the shoreline is 4 km and a profile perpendicular to the coast with a length of 1500 m has been applied to the model. Finally, using numerical modeling, the net and gross potential rates of annual and cumulative sediment transport, as well as shoreline changes after 12 years, were simulated. The effect and length of sedimentation behind the port’s breakwater after 1, 5, 10 and 12 years are 81, 190, 247 and 267 meters, respectively, which is in good agreement with the actual observations. Because the length of the breakwaters is 300 meters, the sedimentation problem has not yet been established for the port after 12 years.

Redesign of Facility Layout at Pelangi Advertising Printing Using the SLP Method Syafirman Pramija; Meipen Meipen
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 65 No 2 (2021): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

This paper aim is to investigate the work system for printing service and redesign facility layout improvement. A case study was conducted in small company namely Pelangi Advertising Printing. The Systematic Layout Planning (SLP) was adopted in this paper. The input data and activities in the SLP process are as follows: material flow, activity relationship, string diagrams, area requirement, area available, space relationship diagrams, modification consideration and practical limitations. The results of this study indicated the application of SLP in case study company can increase in facility layout efficiency from 96.7% to 98.5%. The redesign facility layout result was more effective than the initial layout.

Automatic Identification System (AIS) Decode Design for Ship Monitoring using Labview Software Istardi, Didi; K.A, Ardian Budi; Assad, Nur Sakinah; Saputra, Hendra
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 54 No 1 (2018): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

The AIS (Automatic Identification System) is used for monitoring ship traffic in the Singapore Strait. The AIS system is automated tracking system that was used in ship industry. The system consists of hardware that functions as AIS data receiver and AIS decode software developed with LabVIEW programming language. The system visualizes real-time coordinates of ships (longitude and latitude) to google maps. The method of decoding from AIS data onto ship data consists of 3 stages. Firstly, AIS data with char data type is converted to decimal. Secondly, decimal data is converted to binary and mirrors binary data results. Lastly, binary grouping according to ITU Recommendation M.1371 and binary grouping conversion with MSB reading to decimal are done. Results from the AIS system are: decoded MMSI, navigation status, Rate of Turn (ROT), ship speed, ship position (Longitude and Latitude), Course over Ground (COG), True Heading (HDG), Time Stamp, RAIM flag and Radio status. The accuracy of the system is 99.61%.

Optimization of Gas Turbine Maintenance Scheduling in PLN Tanjung Datuk Pekanbaru Bambang Nofri; Anita Susilawati; Romy Romy
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 64 No 3 (2020): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

This study discusses determining the optimal scheduling for maintenance of gas turbine engines in PLN Tanjung Datuk Pekanbaru. The optimal maintenance scheduling is done on critical components, namely turbine blade and AVR (Automatic Voltage Regulator) using Monte Carlo simulation. The optimal scheduling maintenance scenario is done by generating random numbers from MTTF (Mean Time To Failure) and MTTR (Mean Time To Repair) values and data validity testing. The results of research for optimal checking of turbine engines are once every 10 days with the reliability of turbine engines 43%. The optimal time for repairing a gas turbine in case of damage is 1.49 hours. The checking time for critical components of the turbine blade is 9 days and AVR of 12 days. The scenario of preventive maintenance is likely need special repair or replacement periodically that is 117 days for turbine blade components and 173 days for AVR.

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Contact Name Anita Susilawati

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Journal Mail Official jomase@isomase.org

Editorial Address Teknik Mesin, Fakultas Teknik, Universitas Riau Kampus Bina Widya, Jl. HR. Soebrantas Km. 12,5 Panam, Pekanbaru 28293, Riau, INDONESIA

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Abstract

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Contact Name
Anita Susilawati

Contact Email
anitasusilawati@lecturer.unri.ac.id

Phone
-

Journal Mail Official
jomase@isomase.org

Editorial Address
Teknik Mesin, Fakultas Teknik, Universitas Riau Kampus Bina Widya, Jl. HR. Soebrantas Km. 12,5 Panam, Pekanbaru 28293, Riau, INDONESIA

Location
Kota pekanbaru,

Riau

INDONESIA