Garuda - Garba Rujukan Digital

All

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

jomase
Website

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

3 4 5 6 7

Management of Motorcycle Workshops of SMEs Scale Based on Information System Arief, Dodi Sofyan; Susilawati, Anita; Simaskot, Johar; Badri, Muftil; Dalil, M.
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 47 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)

The good workshop management must also be supported by a properly administration, in order to record all the resources that become workshop assets. Moreover, the motorcycle workshop also conducts spare parts sales to complete the replacement needs of broken vehicle spare parts. This study aims to analyze and design a workshop information system for Small and Medium Enterprises (SMEs) engaged in the field of repairing of motorcycle. Generally, the SMEs scale of motorcycle workshops in this research still uses a simple management system and manually in presenting the data required by the workshop. This it make difficult and inconvenient for the owner of a SMEs scale of motorcycle workshop. Sequence, it is necessary to optimalize the management system from the simpler manual system to be computerized. Stages of the method in this study: (1) survey of general workshop management SMEs scale, (2) do analysis of data obtained during the survey and provides input for workshop management based on 5S method, (3) to design and create information systems and databases using PHP (Hypertext Preprocessor) as the programming language and MySQL as the database. The approach of the 5S (Sort, Straighten, Shine, Standardize, Sustain) and creating an information system can manage equipments and properly administration in SMEs scale of motorcycle workshops. Therefore, they can help to optimize streamline the services and administration activity of SMEs scale of motorcycle workshops.

Finite Difference Method in Regular Geometry Heat Transfer Problem Ngarisan, Noor Syazana; Ab. Aziz, Amiruddin
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 63 No 1 (2019): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Finite difference method (FDM) is a known numerical method for finding approximate solution to boundary value problems (BVP). It is a helpful method in approximating the solutions to differential equation. Numerical methods are very useful in solving engineering problems in many areas related to fluid dynamics, heat and mass transfer problems and other partial differential equations of mathematical physics especially when such problems cannot be solved numerically due to nonlinearities, complex geometries or complicated boundary conditions. However, the application is limited to regular geometry and simple irregular geometry problems.

Analysis of Production Process in Small Business Using Value Stream Mapping Approach Anita Susilawati; Muhammed Sarwar; Toni Darji; Nur Iksan Agusti
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 65 No 1 (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 aims to identify waste and analyse production process activities using the Value Stream Mapping (VSM) in a small business as a case study. The waste was identified by a waste relationship matrix and waste assessment questionnaire to determine the percentage of waste that occurs. Furthermore, a detailed selection of waste mapping based on the value stream analysis tool was carried out. Based on the VSM analysis, it was found the value added activities of 71% of the total production time and 29% of other activity times (non value added). In the case study occurred the waste for the operator's work method at the station of printing and cutting station. The VSM was performed to reducing the waste. The result depicted reduction in lead time on the production floor was 2.3 hours. So, the company in the case study can eliminate the waste time in their production process activities.

The Effect of Misalignment to Vibration, Electric Current and Shaft Rotation Speed on Gear Transmission Romiyadi Nawir; Yudi Dwianda; Adi Febrianton; Purnama Irwan
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 66 No 1 (2022): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Gear is a rotating machine that is widely used as a power transfer transmission in many industries. Gear has a long life times. However, the gears can be damaged due to many factors such as out of the maintenance, which one factor of misalignment. This study aim is to determine the effect of misalignment on the gear transmission to vibration, electric current and shaft rotation speed. In this study, was done alignment process with variations of misalignment on the gear transmission alignment kit and was done measurement value of vibration, electric current and shaft rotation speed. The study results show the greater the misalignment, the greater the vibration that occurs either radially or axially for all conditions measured. The shaft rotation was slower with the greater misalignment. The misalignment can affect the decrease in the rotation speed of the shaft. Therefore, it can reduce the efficiency for power transmission of engine.

Seakeeping Test of Ship Perambuan Model at Maneuovering and Ocean Engineering Basin (MOB) Laboratory for Hydrodynamics Technology Rizal, Nandiko
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 59 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)

Pure experiments done at Laboratory for Hydrodynamics Technology, in the form of seakeeping test of ship perambuan model at full load condition to obtain motion data of ship model recorded by using wireless optical tracking system. With wireless optical tracking system is expected to be more able to describe the phenomenon of motions the ship while sailing. Seakeeping test ship perambuan model is done at Maneuovering and Ocean Engineering Basin (MOB), in irregular wave conditions with significant wave heights Hs = 2.0 m and peak wave period Tp = 8.0 sec at the direction of wave relative to the direction of the ship 180 deg and 135 deg. Measurement of motion of the ship includes 6 DoF (Degree of Freedom) motions that is surge, sway, heave, roll pitch and yaw. Statistical analysis of measurement results is presented in order to know the quality of the ship motion. To support the analysis, the measurement results are also displayed in the Response Amplitude Operator, RAO.

Modeling of Control System on Sorting Palm Fruit Machine by Using Arduino Microcontroller Arief, Dodi Sofyan; Fitra, Edy; Minarni, Minarni; Herman, Herman; Salambue, Roni
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 52 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)

One of the reasons for the poor quality of palm oil in Indonesia is because of the separation system of processing method is processed manually. In this research, the proposed solution to overcome the problem is by applying the automatic separation system by using microcontroller. The maturity of the fruit will be determined from the image that taken by a camera. The reading of the camera image will be processed in a microcontroller which will move the separator arms so that the fruit will be separated based on the level of maturity. This system is designed to work continuously by placing the palm fruit over a conveyor belt mechanism. With this automation method, the separation process of fruit is no longer depends on the ability of humans manually and more importantly it can take place continuously.

Stability Prediction of a Multi Purpose Vessel Wardhana, Ede Mehta; Soetardjo, Meitha
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 61 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)

Operational determination requirements for Multi Purpose Vessel Ship need to consider the basic functions carried out, namely to carry out the transportation of equipment and combat logistics from the base to the operating area both in the context of amphibious landings and administration landings. Stability predictions are very important to be carried out at the design stage to determine the static stability conditions of the ship as well as its estimated dynamic stability In addition to the basic functions on board the type of Multi Purpose Vessel (MPV) Ship can be given the following additional functions: Transport troops, logistics and equipment from or ships to landing beaches, and sea transportation assistance, in SAR activities. In this manuscript, the MPV will be analyzed for the stability value. Those stability will be analyzed in order to predict whether the stability value in the MPV for the operational ship is feasible or not. The calculation will take into account the value of KN and also limiting KG value. The result is shown that the overall KN value shows good and normal value for the MPV

Numerical Analysis of Resistance Acting on Sea-Going Pusher and Barge System Sano, Masaaki; Kawano, Yusuke; Yamamoto, Takuto; Yasukawa, Hironori
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 49 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)

Because a pusher and barge system (P/B) can be divided into a pusher and a barge(s), the pusher does not need to wait for the completion of loading/unloading, and it can start the next voyage soon after arriving. Therefore, a good transportation efficiency can be expected. In these days, a P/B is also available to a sea-going service by developing a mechanical connection which enabled a P/B to achieve the seaworthy performance in waves. However, there is a concern that the navigation speed is usually less than same-size cargo ships. It may be due to significant vortices generated in the gap at the connection, but the mechanism is still unclear. From this viewpoint, in this study, CFD analysis was carried out to investigate the resistance performance associating with the flow and pressure fields around the pusher and barge, especially with focus on the gap between them. We discussed the unique change of the resistance characteristic depending on the barge load conditions.

The Effect of Population Behavior on New Renewable Energy in Primary Energy Mix for 2025 National Target: Sumedang Regency Review, West Java Handoko Handoko; Adianto Adianto; Siow Chee Loon
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 64 No 1 (2020): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

The results of the Study of the Agency for the Assessment and Application of Technology in 2018 estimated the primary energy mix target of renewable energy at 23 (twenty three) percent by 2025 will not be reached. It is estimated that only reach 12.9 (twelve point nine) percent. The use of renewable energy, especially biomass and biogas by the population independently has not been included in the calculation of meeting the energy mix target by the government. Even though the potential of primary energy of bio energy in Indonesia is 32,653.8 MW. This study examines the behavior of the population towards the use of renewable energy, especially biomass and biogas in meeting their needs for cooking and business. The face-to-face research was carried out on 85 (eighty-five) respondents and online as many as 16 (sixteen) respondents in 17 (seventeen) villages in 7 (seven) districts in Sumedang Regency. The study was also conducted on 574 (five hundred seventy four) respondents both online and face to face in 366 (three hundred sixty six) villages in 240 (two hundred forty) districts in 91 (ninety one) districts / cities in 22 (twenty two) provinces. From the results of research and analysis of characteristics, descriptive analysis, logistic analysis and calculations; shows that: (a) trends in 2025, Sumedang residents choose to use biogas fuel, (b) trends in 2025, Indonesians choose to use solid fuels, (c) minimum contribution or potential contribution of Indonesian population to achieving energy mix targets primary New and Renewable Energy of 3.80 (three point eight) percent in 2018 and increased to 8.16 (eight point sixteen) percent in 2025 or about 35 (thirty five) percent of the target of the New and Renewable Energy mix. Thus, this research needs to be followed up and encourage the government through the National Energy Council to conduct more comprehensive research in all regions in Indonesia.

Tricopter Vehicle Frame Structure Design Integrated as Platform of Fixed Wing Atha Mapper 2150 Kaspul Anuar; Warman Fatra; Musthafa Akbar
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)

To upgrade aerial vehicle of Atha Mapper 2150 capable of vertical take-off and landing capability, it needs to be integrated to the tricopter vehicle. In this study the tricopter frame structure was designed based on the Atha Mapper 2150 fixed wing vehicle. This study began with a calculation process to determine the dimensions of the tricopter.. Next, the process of building four tricopter concept designs with variations of the shape of the frame and the cross section of the arm. The four concept designs are selected using a decision matrix. Based on the values in decision matrix table, the design concept I (Y configuration and rectangular arm cross section) was the best design, because it has the highest weighting value. The selected design was then simulated for its structural strength in Ansys software by giving a load of thrust to the three arms of the tricopter frame. In the middle of frame is given a boundary condition in the form of hinges. From the static simulation results of the tricopter frame structure, the maximum stress value was 54,126 MPa, which occurred on the M3 arm. The greatest total deformation also occurred in the M3 arm with a value of 10,335 mm. The safety factor value of tricopter frame structure was 8.77. This shows the tricopter frame structure with the main material in the form of carbon fiber, acrylic and PLA meets the required safety criteria.

Page 5 of 33 | Total Record : 329

3 4 5 6 7

Filter by Year

2013 2025

Filter By Issues

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

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

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

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

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

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