EPI International Journal of Engineering
EPI International Journal of Engineering (EPI-IJE) is published and managed by Center of Technology, Faculty of Engineering, University of Hasanuddin (CoT, FoE, UNHAS), Indonesia. The main objective of this international journal is to create publishing opportunities and to disseminate knowledge in engineering-related topics collected from all over the world. A wide range of topics may be accepted, including from both conventional engineering and newly developed fields. Multi-disciplinary and Inter-disciplinary fields are encouraged to submit, and the topic on engineering education is also welcome. Manuscripts should be in English only. This journal system is open free-access to public in electric form, and the paper-form journal is also available. No fee is charged to accepted papers. On acceptance of submitted paper, authors are asked to submit a short copy-right form, but the authors have rights to reuse their work. The submitted manuscripts are under peer review at least by two reviewers, and publication is made biannually.
Articles
168 Documents
<![CDATA[Study on Transverse Strength of the Deck-Container Ships due to Laying All Containers on Deck ]]>
<![CDATA[Rosmani Munandar]]>;
<![CDATA[Andi Ardianti]]>;
<![CDATA[Ganding Sitepu]]>;
<![CDATA[Andi Mursid Nugraha]]>;
<![CDATA[Hamzah Hamzah]]>;
<![CDATA[Muhammad Ichsan Hayatuddin]]>
<![CDATA[ EPI International Journal of Engineering Vol 2 No 2 (2019): Volume 2 Number 2, August 2019 with Special Issue on Natural Disaster and Mitigat ]]>
Publisher : <![CDATA[Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University ]]>
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DOI: 10.25042/epi-ije.082019.14
<![CDATA[The strength of transversal structure of the ship has a great effect on the safety of ship. Shipswill experience conditions that affect the strength of the ships structure. A deck-container ships are the ships that all container are loaded on deck such as MV. Khendaga Nusantara series ships. The transversal strength of the ships is loaded mainly by the weight of cargolaying on deck.. This research aims to determine the transverse strength of a deck-container ship due to the all container loads on deck. The research was done by usingfinite element method throughmodeling transverse ship structure, the simulation is conducted by varying the amount and lay-out of containers on dec). The loads appliedto the model are side loads, bottomloads, and deck loads in according to BKI rules. The results shows that the stress that occurred in the web frame was 140,63 N/mm2due to the placement of the entire container on the deck(full loading). For ship structure response, a deformation of 2,86 mm occurred in the web frame area at maximum loading. Stress ratio that occurs in all ship’s structuredoes not exceed 1 in other words the working stress does not exceed the allowedstress according to BKI rules.]]>
<![CDATA[Massive Fire Incidents of Multiple Aboveground Storage Tanks due to Vapor Cloud Explosion ]]>
<![CDATA[Shoichi Yoshida]]>
<![CDATA[ EPI International Journal of Engineering Vol 2 No 2 (2019): Volume 2 Number 2, August 2019 with Special Issue on Natural Disaster and Mitigat ]]>
Publisher : <![CDATA[Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University ]]>
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DOI: 10.25042/epi-ije.082019.03
<![CDATA[The vapor cloud explosion (VCE) begins with a release of a large quantity of flammable vaporing liquid from a storage tank, transportation vessel or pipeline. If VCE occurs in an oil storage facility, multiple tanks burn simultaneously. There is no effective firefighting method for multiple tanks fire. It will be extinguished when oil burned out spending several days. Many incidents of multiple tanks fire due to VCE have occurred all over the world in recent 50 years. This paper reviews the past 6 incidents of multiple tanks fire due to VCE.]]>
<![CDATA[Docking Unit Joining Omni Wheel Robot and Mobile Robot ]]>
<![CDATA[Naoki Igo]]>;
<![CDATA[Daichi Fujita]]>;
<![CDATA[Ryoma Hanabusa]]>;
<![CDATA[Yasuto Nagase]]>;
<![CDATA[Satoshi Mitsui]]>;
<![CDATA[Toshifumi Satake]]>
<![CDATA[ EPI International Journal of Engineering Vol 2 No 2 (2019): Volume 2 Number 2, August 2019 with Special Issue on Natural Disaster and Mitigat ]]>
Publisher : <![CDATA[Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University ]]>
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DOI: 10.25042/epi-ije.082019.07
<![CDATA[This research realizes a docking unit joining omni wheel robot and mobile robot. The omni wheel robot cannot move on rough ground. In order to move on rough ground, a mobile robot that can move with the omni wheel robot is required. The docking unit aims at a unit that can be used without remodeling omni wheel robot. The docking unit realized by this research can store the fixed part of the omni wheel robot. When omni wheel robot is mounted, the mounting surface is flat because the fixed parts are stored, and the omni wheel robot can be mounted by sliding. As a result, we designed a mechanism to connect the fixed parts to store the parts that fix the omni wheel robot. And the fixed parts with the mechanism were made.]]>
<![CDATA[Basic Study on Deformation Evaluation of Steel Wire Mesh for Rational Gabion Structure Design ]]>
<![CDATA[Hiroshi Nakazawa]]>;
<![CDATA[Tsuyoshi Nishi]]>;
<![CDATA[Hiroyuki Kurihara]]>;
<![CDATA[Daisuke Suetsugu]]>;
<![CDATA[Tadashi Hara]]>
<![CDATA[ EPI International Journal of Engineering Vol 2 No 2 (2019): Volume 2 Number 2, August 2019 with Special Issue on Natural Disaster and Mitigat ]]>
Publisher : <![CDATA[Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University ]]>
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DOI: 10.25042/epi-ije.082019.04
<![CDATA[Gabion structures are used in a variety of ways in Japan and around the world because they allow for the creation of simple structures at highly reasonable construction costs and completion periods. Previous earthquake damage surveys have shown that, in many cases, gabion structures did not collapse even though deformation was allowed, and have demonstrated that the wire mesh used in their construction has a high confinement effect on the stones filling the gabion. Despite this, gabions have not been actively utilized, nor have they been used to construct permanent structures in Japan because the design and construction of such structures are based on experience, and a standardized design method has not been developed. Hence, in order to facilitate development a design method for gabion-based structures, we must first go back to the basics and establish a detailed explanation of the wire mesh deformation mechanism of such structures. In this study, we performed tensile tests on wire meshes of different shapes in order to determine their strength and deformation characteristics and then conducted numerical analyses using the results obtained. The tensile tests revealed that deformation characteristics differed depending on the mesh shape and tensile direction. We also showed that the direction in which the tension acts and the mesh nodes are important, and that the test results could be reproduced via numerical analysis with the finite element method by using beam elements.]]>
<![CDATA[Evaluation of Numerical Analysis for Earthquake Resistance of Retaining Wall Using Gabions ]]>
<![CDATA[Tsuyoshi Nishi]]>;
<![CDATA[Tadashi Hara]]>;
<![CDATA[Hiroshi Nakazawa]]>;
<![CDATA[Daisuke Suetsugu]]>
<![CDATA[ EPI International Journal of Engineering Vol 2 No 2 (2019): Volume 2 Number 2, August 2019 with Special Issue on Natural Disaster and Mitigat ]]>
Publisher : <![CDATA[Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University ]]>
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DOI: 10.25042/epi-ije.082019.05
<![CDATA[In developing countries, gabions are widely used in several construction works, like road, river, countermeasures against slope failure and so on, because of their easy operation and low cost. In 2015 Nepal Gorkha Earthquake, a lot of retaining walls using gabions were not damaged against the strong earthquake because of their high flexibility. However, some deformation or declination were reported dpending on retaining wall types and ground conditions behind retaining walls. Therefore, in order to evaluate the earthquake resistance and residual deformations of retaining walls using gabions widely observed in Nepal, full-scale shake table tests and laboratory tests were conducted in previous studies. In this study, elemental simulations for determination of the analysis parameters based on the results of triaxial compression tests were carried out to check the validity of parameters. Then, a series of numerical analysis using proposed model was performed to reproduce the dynamic behaviors of full-scale shake table tests and evaluate the earthquake resistance of retaining wall using gabions. According to the results of these numerical analysis, it was confirmed that proposal model adequately could simulate the dynamic response of retaining walls in the full-scale shake table tests. and it was also cleared that the stepwise type retaining wall was superior to that of vertical type from the standpoint of earthquake stability against sliding and overturning.]]>
<![CDATA[The Corrosion Erossion of Ship Propeller Al 7075 Produced by Gravity Sand Casting ]]>
<![CDATA[Milka Rante]]>;
<![CDATA[Muhammad Syahid]]>;
<![CDATA[Onny Sutresman]]>
<![CDATA[ EPI International Journal of Engineering Vol 2 No 2 (2019): Volume 2 Number 2, August 2019 with Special Issue on Natural Disaster and Mitigat ]]>
Publisher : <![CDATA[Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University ]]>
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DOI: 10.25042/epi-ije.082019.13
<![CDATA[Propeller is one of the important components of ships and boats that function as motor or boat propulsion. The mechanical properties required in propeller material are high toughness, easy to cast, and good engine capability, as well as good resistance to corrosion and erosion. One of the aluminum alloys that have been widely used in major vessels in propeller systems is the Nickel-aluminum-bronze (NAB) alloy because it has an excellent combination of mechanical properties and corrosion-erosion resistance. Another type of aluminum alloy that is widely used as a machining component is the Al 7075 T651 because it has the highest strength among other aluminum alloys. The mechanical properties of the Al 7075 T651 are directly proportional to the erosion resistance of the propeller which agrees with the pot tester porridge. The higher the value of the erosion propeller failure that occurs also increases with increasing testing rotational speed. For corrosion, a propeller with air testing media at a speed of 1000 rpm which results in significant corrosion products. Keywords: Al 7075 T651, Slurry Pot Tester, Corrosion Erosion]]>
<![CDATA[Crab Larvae Counter Using Image Processing ]]>
<![CDATA[Furqan Zakiyabarsi]]>;
<![CDATA[Muhammad Niswar]]>;
<![CDATA[Zahir Zainuddin]]>
<![CDATA[ EPI International Journal of Engineering Vol 2 No 2 (2019): Volume 2 Number 2, August 2019 with Special Issue on Natural Disaster and Mitigat ]]>
Publisher : <![CDATA[Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University ]]>
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DOI: 10.25042/epi-ije.082019.06
<![CDATA[Very small larval size, high mortality rate of crab larvae, the absence of an accurate crab larva counter at affordable price, the density of larvae that are not known accurately, the ratio of feed that not in accordance with the number of larvae to damage water quality and cannibalism, water quality can not be adjusted to the density of distribution, and economically unprofitable both in terms of feed efficiency and buying and selling transactions. By knowing the number of crab larvae accurately the survival rate of crab larvae increases and is economically beneficial. In this study larvae counters were designed and developed. This tool uses digital imagery to detect and count the crab larvae zoea-1 phase. The accuracy of crab larva counter is 89,8%.]]>
<![CDATA[The Visitors’ Perception Toward the Comfort of Social Interaction in Public Space ( A Case Study in Karebosi Field Makasar) ]]>
<![CDATA[Andi Muhammad Ichsan]]>;
<![CDATA[Afifah Harisah]]>;
<![CDATA[Abdul Mufti Radja]]>
<![CDATA[ EPI International Journal of Engineering Vol 2 No 2 (2019): Volume 2 Number 2, August 2019 with Special Issue on Natural Disaster and Mitigat ]]>
Publisher : <![CDATA[Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University ]]>
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DOI: 10.25042/epi-ije.082019.10
<![CDATA[Public space has an important role to incresase physical health and social interaction of city communities. Karebosi field is public space which is in the development priority by Makasar city government. Karebosi field is the most ideal facility to represent the concept of an open public space in Makasar. After going through revitalization process, the government still continues to reform and refine Karebosi field functions. This research aims to find out the visitors’ perception towards the comfort of social interaction in Karebosi field, and what factors which are influence them as well. This research was conducted in 2018 at Karebosi field, Makasar. The method used in this research is mixed method (qualitative – quantitative). The technique of data collection is done by evidentiary method through data triangulation (observation, questionnaire, and interview). The result of this research can be concluded that the facility in Karebosi field is quite successful in attracting the visitors to do sport activities in public space, yet the level of success is still not optimal because it is still in the range of 60.89%, it is due to the facility development that have not been varied, the facilities are considered as not being able to stimulate the diversity of social interaction and increasing the number in public space. Designing, Karebosi field is not able to give impression and meaning for the people who do the activities in it. It is expected to be a reference for Makasar government in formulating the steps to increase the service quality and the functions of Krebosi field in the future.]]>
<![CDATA[Design and Fabrication of an Automatic Trash Remover for Open Channel Waterway for Micro Hydropower Plant Application ]]>
<![CDATA[A. M. Shiddiq Yunus]]>;
<![CDATA[Musrady Mulyadi]]>;
<![CDATA[Apollo Apollo]]>
<![CDATA[ EPI International Journal of Engineering Vol 2 No 2 (2019): Volume 2 Number 2, August 2019 with Special Issue on Natural Disaster and Mitigat ]]>
Publisher : <![CDATA[Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University ]]>
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DOI: 10.25042/epi-ije.082019.09
<![CDATA[Mitigation of catastrophic impacts of exhausted pollutants from conventional based power plants could be done by extensively used of renewable energy-based power plants. One of the promising renewable-based power plants that already have technology maturity is hydropower. However, large scale hydropower is based on an appropriate site and not economically effective for isolated and remote small communities. As anticipation, to fulfill the power requirements of these communities, micro-hydropower plants (MHPPs) are applied due to its inexpensive capital and low maintenance cost. Normally, MHPPs projects are finalized from civil construction to powerhouse. A simple trash filter is usually located before the intake of the penstock. This simple trash filter usually causes a problem related to trash collection that blocks the water debit into the penstock intake. The low debit, might cause the turbine's rotation will be reduced which in turn downgrade the voltage and frequency. Low voltage and frequency might harm consumers. In this paper, a new control mechanism based on Arduino Mega of automatic trash removed is introduced.]]>
<![CDATA[Landslide Disaster Risk Assessment Model in Soppeng Regency, South Sulawesi ]]>
<![CDATA[Adi Maulana]]>;
<![CDATA[Suharman Hamzah]]>;
<![CDATA[Iswandi Utama]]>;
<![CDATA[Jamal Rauf Husain]]>
<![CDATA[ EPI International Journal of Engineering Vol 2 No 2 (2019): Volume 2 Number 2, August 2019 with Special Issue on Natural Disaster and Mitigat ]]>
Publisher : <![CDATA[Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University ]]>
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DOI: 10.25042/epi-ije.082019.01
<![CDATA[Landslide disaster risk assessment model has been proposed for Soppeng Regency which is located in the central part of South Sulawesi Province. Some areas in this regency are classified as landslide prone area based on its geological condition. This study is aimed to assess the landslide vulnerability level and produce a landslide vulnerability map by using mapping method as a basis to model the risk reduction assessment. The component of disaster risk assessment consists of threats, vulnerabilities, and capacities. These components are used to obtain the level of disaster risk in an area by calculating the potential for exposed lives, loss of property and environmental damage. The result shows that Soppeng Regency region has some areas that are prone to landslides with low-high levels. The Vulnerability Assessment is classified as medium level whereas the result of landslide disaster capacity assessment is also shown as medium level. Based on these analyses, it was concluded that Soppeng Regency had a high landslide threat index, with a medium exposed population index and a medium capacity index. The study of landslide disaster risk assessment in Soppeng Regency has shown that Soppeng Regency has been classified as landslide prone area with the medium risk level, especially in mountainous and river bank area. It is recommended that disaster risk assessment model should be used as one of the references for providing disaster risk mitigation plan in disaster risk reduction program.]]>
