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EPI International Journal of Engineering
Published by Universitas Hasanuddin
ISSN : 26155109     EISSN : 26210541     DOI : https://doi.org/10.25042/epi-ije
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering 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.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 168 Documents
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Feasibility Analysis of Runway, Taxiway and Apron Dimensions of Torea Airport in Fakfak Regency, West Papua Province Muhammad Yunus; Ratna Septa Sari Tuhepaly; Ahmad Fitriadhy
EPI International Journal of Engineering Vol 4 No 2 (2021): Volume 4 Number 2, August 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/10.25042/epi-ije.082021.09

Abstract

The development of transportation sector modes, especially air transportation modes, is currently experiencing a very significant development. This is because the mode of air transportation in the form of airplanes can make people move very quickly, unlike land and sea transportation modes which require a longer time. In this regard, an airport that meets the requirements in terms of flight security and safety is needed. The aim of the study was to analyze the dimensions of the runway, taxiway, appron and evaluate the feasibility of the runway, taxiway, appron dimensions at Torea Airport in Fakfak Regency, West Papua Province. From the results of the research conducted, it was found that the dimensions of the runway length of Torea Airport have met the minimum requirements set by the International Civil Aviation Organization (ICAO) in 2016 with a runway length of 1201.8 m Torea Airport but in terms of requirements for the type of aircraft ATR 72-600 does not meet the requirements. While for the standard dimensions of the runway width and the width of the runway shoulder of Torea Airport according to the Regulation of the Ministry of Transportation of the Directorate General of Civil Aviation Number: KP 39 of 2015 concerning Technical and Operational Standards of Civil Aviation Safety Regulations
The Impact of Local Wisdom on the Coastal Settlement Spatial Configuration in the City of Parepare Hasniar Baharuddin; Idarwani Asmal; Edward Syarif
EPI International Journal of Engineering Vol 4 No 2 (2021): Volume 4 Number 2, August 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/10.25042/epi-ije.082021.11

Abstract

Soreang Settlement is located on the waterfront of Parepare City in South Sulawesi, Indonesia. Initially, it was inhabited by the Soreang kingdom community and then developed due to by local culture. This research was to explain the influence of local culture on the spatial configuration of the Soreang settlement. The research method used is a synchronic reading analysis technique, which is supported by ArcGIS and the space syntax methods. The results of the research are: the first, the spatial configuration of Soreang settlements is influenced by three local cultures, namely sipakatau cultural meaning is sense mutual respect, sipakalebbi cultural meaning is sense of equity and simasemaseang cultural meaning is sense of family. The second, the simasemaseang culture, infact to a clustered settlement pattern formed. Sipakalebbi culture infact to settles into a linear and spreading pattern formed, whereas Sipakatau culture infact to a settles into an elongated and centered pattern formed. Third, Simasemaseang culture forms the most integrated spatial configuration. This research might well be utilized to generate a design for waterfront settlement based on local wisdom.
Evaluation of Achievement of Overburden Production Target Using Fishbone Diagram Method at Pit A Site B PT XYZ, South Sumatera Province Aurah Masyitha Ayu Namira; Aryanti Virtanti Anas; Rizki Amalia; Rini Novrianti Sutardjo Tui
EPI International Journal of Engineering Vol 4 No 2 (2021): Volume 4 Number 2, August 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/10.25042/epi-ije.082021.08

Abstract

PT XYZ is one of the companies engaged in the coal mining and energy in South Sumatra Province. Mining activities at the Pit A are still focused on stripping overburden using the Komatsu PC-3000E power shovel digging tool. The company has established a 513,333 BCM production target of overburden stripping in November 2020. While the total overburden production obtained is 488,162 BCM. The existence of factors that affect the productivity of the tool will determine the achievement of production targets, so it is necessary to evaluate production by identifying the factors causing the problem. One of method that can be used to determine the root cause of the problem is by using a fishbone diagram. A Fishbone diagram is a method used to identify the root cause of a quality problem. The purpose of this research is to calculate overburden production in November 2020, identify factors that influence the achievement of overburden production targets using a fishbone diagram, and make recommendations for improvement plans based on factors that affect the achievement of overburden production targets. Based on the results of the fishbone diagram analysis using the 4M pattern consisting recommendations for improvement plans can be designed for each factor causing the problem which is machine, methods, materials, and manpower.
Optimum Investigation LED Bulbs Light as Photon Energy on Photovoltaic Panel Installed Inside Buildings Mustofa Mustofa; Anjar Asmara; Yuli Asmi Rahman; Tutang Muhtar Kamaludin; Hariyanto Hariyanto; Zuryati Djafar; Wahyu Hariyadi Piarah
EPI International Journal of Engineering Vol 4 No 2 (2021): Volume 4 Number 2, August 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/10.25042/epi-ije.082021.02

Abstract

This study was conducted to obtain the angle of elevation of solar panels (PV) to harvest photon light energy sources from LED bulbs that are often used in residential homes or buildings. The PV tilt angles tested are 0, 15, 30 and 90º by placing a constant bulb in its position. The results of the observations show that a slope of 0º produces the highest PV electrical power, although it is not significant compared to the other 3 slope angles. The decrease in PV output power occurs when the slope angle increases. Optimum power of 16.93 Watt is obtained by using a Hannochs bulb at a power of 15 Watt with an angle of elevation of 0º. Furthermore, the power decreased to 16.33, 12.92, and 12.91 Watts at angles of 15, 30 and 90º, respectively. Further research is still needed by increasing the variation of bulb power above 15 Watts to validate the position of the PV panels on the walls of the building according to light source.
The Development of Earthquake Simulator Nur Azhary Iriawan Eka Putra; Rafiuddin Syam; Ilyas Renreng; Tri Harianto; Nanang Roni Wibowo
EPI International Journal of Engineering Vol 4 No 2 (2021): Volume 4 Number 2, August 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/10.25042/epi-ije.082021.05

Abstract

An earthquake is an event that vibrates or shakes the earth due to the sudden movement or shift of rock layers on the earth's crust due to the movement of tectonic plates. Earthquakes that occur cause damage to buildings and loss of life and can trigger other natural disasters such as tsunamis and even liquefaction. To anticipate this, it is necessary to study the structure of the building and tools to test the strength of the building, so that it becomes an effective tool and is needed to anticipate the occurrence of large losses. The earthquake simulator was built in the form of a shaking table driven by a hydraulic actuator. The earthquake simulator is equipped with a proximity sensor to determine the cylinder motion distance which is controlled using proportional and integral using the Arduino Mega2560 controller. The results showed that the shaking table can work ideally with a value of P (kc) = 0.066195 and a value of I (ki) = 2.009974 which can produce acceleration data in actual (real-time) which is displayed in graphical form on the LabVIEW front panel.
Study of Environmental Carrying Capacity on the Development of Formal Housing in Moncongloe District, Maros Regency Samsuddin Amin; Nurmaida Amri; Abdul Rachman Rasyid; Muhammad Faathir Nugraditama; Syifa Beby Alisha
EPI International Journal of Engineering Vol 4 No 2 (2021): Volume 4 Number 2, August 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/10.25042/epi-ije.082021.03

Abstract

Moncongloe District is an area with a relatively high population growth rate and distribution of housing, especially formal housing. This condition has implications for the tendency of increasing problems related to the carrying capacity of the environment and the suitability of land functions in the area. Therefore, it is necessary to harmonize the development of formal housing with the carrying capacity of the environment so that the negative impact of the phenomenon of formal housing development in this area can be avoided. The purpose of this study is to analyze the environmental carrying capacity of the development of formal housing for the prediction of the next 20 years. The analytical method used is a combined method of qualitative and quantitative analysis with a focus on the study of population projections, land availability and needs, and the carrying capacity of residential land. The results showed that the population in Moncongloe District in 2021 was 23,738 people, while the projected population in 2041 was 46,779 people, which means an increase of 97.06%. The results of the analysis of land availability show that 50% of the area of Moncongloe District is recommended for the development of residential land, including formal housing. The value of the carrying capacity of residential land (DDPm) in Moncongloe District in 2021 is 20.7 while in 2041 it is 20 so it can be concluded that the environmental carrying capacity in Moncongloe District can still accommodate the development of settlements for the next 20 years.
Accurate Results for Free Vibration of Doubly Curved Shallow Shells of Rectangular Planform (Part.2 Thickness effect) Yoshihiro Narita
EPI International Journal of Engineering Vol 4 No 2 (2021): Volume 4 Number 2, August 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/10.25042/epi-ije.082021.13

Abstract

This paper presents a follow-up study of a previous work that deals with the free vibration of moderately thin isotropic shallow shells under general edge conditions. The same semi-analytical method is used in this study for identical shape and degree of curvature in doubly curved geometry, and accurate natural frequencies are tabulated for a wide range of the shell edge conditions. Emphasis is made, however, to present the frequency parameters for the shallow shells with very thin thickness (representative length/shell thickness=100). In numerical experiments, convergence test is made against series terms in the case of very thin shallow shells. Twenty-one sets of frequency parameters are tabulated for three shell shapes (spherical, cylindrical and hyperbolic paraboloidal shells) and two curvature ratios. These two papers (Part.1 and 2) will constitute the accurate standard in the area of shallow shell vibration of rectangular planform and serve for future comparison and practical design purpose.
Free Vibration Characteristics of Thin Spherical Shells Koji Sekine
EPI International Journal of Engineering Vol 4 No 2 (2021): Volume 4 Number 2, August 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/10.25042/epi-ije.082021.12

Abstract

Free vibration characteristics of thin spherical shells having freely boundary conditions are analyzed. In this study, the fundamental properties of natural vibration for the spherical shells are investigated. The power function is employed as the admissible function, displacement functions satisfying the geometric boundary conditions are expressed in the form of single series. The eigenvalue problem for free vibration of the shells derived by using the Lagrange’s equation of motion, is processed numerically to acquire the natural frequencies and mode shapes. The reliability and accuracy of the present results are verified by convergence tendencies of the present solutions and comparisons of the data between the current analysis, FEM (finite element method) and published literatures. In numerical results, the variations of natural vibration characteristics of the shells due to the circumferential wavenumber and various shell geometries are illustrated.
Strength Analysis Due to the Elongation’s Ladder of Cutter Suction Dredger Ship Hariyono Hariyono; Ganding Sitepu; Muhammad Zubair Muis Alie
EPI International Journal of Engineering Vol 5 No 1 (2022): Volume 5 Number 1, February 2022
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022022.01

Abstract

The more frequent mining activities are carried out, the deeper the tin on the seabed, therefore many ship owners want to increase the length of the ladder on production suction vessels. The owner of the KIP Timah 8 suction boat will increase the length of the ladder to 70 meters, which previously was only 58 meters. The paper research are the response of the ladder structure before and after being extended, the limit strength of the ladder structure in the pulley area, then the ultimate strength of the longitudinal ladder structure due to the vertical bending moment. Lenght of the ladder construction subsequently increases commencing 58 m, 62 m, 66 m, to 70 m with each increase in length varying the slope angle of the ladder starting from 0o, 30o, 45o, to 60o. This paper uses a numerical method with the help of ansys software. The structure being reviewed is only in the ship ladder area. The response of the ladder structure before and after being extended, the maximum stress value occurs in the strut construction which is 49 meters from the ladder shaft, which is 56.88 N/mm2 and the maximum shift is 14.28 mm when the ladder length is 70 meters and still meets the allowable stress. Investigation of the limit strength using the Nonlinear Finite Element Analysis (NLFEA) method. Based on the results the analysis of the strength longitudinal ladder structure in the hogging and sagging conditions 42 meters from the ladder shaft, the maximum deflection in the column is 131.73 mm from the initial position before being loaded. While at an angle of 60 degrees it will collapse when deflection 66.17 mm. The results of the analysis showed that the load acting on the ladder the pipe load, cutter load and cutter torque the resulting stress still meets the stress that the longer ladder is directly proportional to the resulting stress and deflection value and the greater the slope of the ladder, the smaller stress and deflection.
Numerical and Experimental Analyses of Track Shoe Patterns for Vehicle on Sandy Terrain Ignatius Pulung Nurprasetio; Wirya Wicaksana; Siti Zulaikah; Bentang Arief Budiman
EPI International Journal of Engineering Vol 5 No 1 (2022): Volume 5 Number 1, February 2022
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022022.02

Abstract

A track is a vehicle propulsion system that consists of a continuous band of chains connected with track shoes or may be entirely made of rubber. The track system is still commonly used on various vehicles, including bulldozers, excavators, tanks, and tractors, and has recently been used in lunar expedition vehicles. A tracked vehicle is mainly designed to provide better mobility in rough, uneven, or slippery terrain. The main component of the track system is track shoes or so-called grousers. This track shoe geometry will determine the tractive performance of the vehicle. If an incorrect shape is used, the excavator will most likely slip. The previous study approached this traction problem by using the semi-empirical method. However, until now, the track geometry and traction relation are still unclear. This research focuses on the effects of track shoe geometry on tractive performance and vehicle climbing ability. The analysis was mainly conducted with a DEM (Discrete Element Method) simulation. The result from the experimental test is also confirmed using a small-scale RC prototype on simulated terrain with different slope variations. It is proven that the grouser height directly affects the climbing performance of tracked vehicles. A higher grouser height proves to be better at a higher inclination slope. However, for a low inclination angle, the flattened track was better. The traction result from the EDEM simulation also yields a similar result. However, higher usable traction means more friction is generated; therefore, the track with higher traction also takes more energy to cover the same distance.

Page 12 of 17 | Total Record : 168

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