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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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Contact-Free Mortuary Trolley Design as a Device for the Mobility of Covid-19 Victims Vania Katherine Mulia; Nanda Indriana; Qurriyatus Zahro; Farid Triawan
EPI International Journal of Engineering Vol 4 No 1 (2021): Volume 4 Number 1, February 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022021.04

Abstract

The Covid-19 pandemic has caused many issues, especially in the medical field. One of the groups that are affected by the pandemic the worst is the health workers. The surge of demand for health services, especially for Covid-19 patients, overwhelms health workers, forcing them to work extra hard and eventually experience exhaustion. Due to this condition, the health workers may face difficulties in doing heavy-duty work. This paper proposes a design of a mortuary trolley as a device to ease the health workers in handling the dead bodies of Covid-19 victims. Considering the need for a corpse mobility aid that is contact-free, the design utilizes a combination of a scissor lift structure, a power screw mechanism to elevate and lower the table, and a conveyor system to load and unload the table. To ensure that the device can operate without experiencing unwanted failure, strength analyses are done on the most critical components, such as the scissor arm, pin joint, power screw, and scissor arm connector, to determine the safety factor at maximum load in static and fatigue loading condition. Analysis results show that all those components have a safety factor greater than 1 for both static and fatigue loading conditions, indicating the device will not yield and is predicted to have infinite life. The design and analyses of this device can be a reference for manufacturers of medical devices to design a mortuary trolley to ease the work of health workers.
Air Quality of a Parking Building in Makassar (A Case Study of Bosowa Tower Parking Building) Nasrul Kulle; Baharuddin Hamzah; Rosady Mulyadi
EPI International Journal of Engineering Vol 4 No 1 (2021): Volume 4 Number 1, February 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022021.11

Abstract

This study aims to determine the level of air quality in the parking building based on the pollution content in it (CO, CO2, HCHO and, VOC), to analyze the effect of the weather, intensity of motorized vehicle traffic, and surface elevation to the air quality. The dependent variable is the level of air pollution. The research sample is the Makassar Bosowa Tower Parking Building, data collection was carried out by direct measurement and observation in 12 days from November 24th till December 17th. The research was done using the comparative method, The data processed using the Mann-Whitney difference test, and the Spearman correlation test using SPSS application. The results showed that the average CO levels had exceeded the limit of good air quality, the average of CO2 levels was still within the limits for good air quality, and the average of HCHO and VOC levels were mostly within the limits for good indoor air quality, according to The Indonesia Minister of Health Regulation Number 1077 in 2011. The result of measurements and tests shows that the changes in the weather do not have a significant effect on the air quality. The amount and the intensity of motorized vehicle traffic affect the air quality, especially during rainy weather.
Integration of Natural and Artificial Light on Energy Efficiency of the Mega Bank Makassar Tower Building Isty Cahyani Ismail; Ramli Rahim; Baharuddin Hamzah
EPI International Journal of Engineering Vol 4 No 1 (2021): Volume 4 Number 1, February 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022021.10

Abstract

One of the largest energy consumers in the world is buildings. The energy consumption comes from the lighting system. Energy use in buildings is generally 25% for lighting systems. The strategy used in building design is to reduce energy consumption while maintaining the best comfort in a building. The application of energy-saving concepts from the building sector is optimizing the lighting system by integrating natural and artificial lighting systems. This study aims to determine the light intensity in the integrated lighting system of natural and artificial manually and also to find out how much energy can be saved with the integrated lighting system manually. The research location is at the Mega Bank Makassar Tower Building. The research sample was selected by purposive sampling and the sixth floor was chosen as the research location. In this study, simulations were carried out using the DIAlux 4.13 program to integrate natural and artificial light and to calculate the amount of energy efficiency in the workspace. To obtain optimal light intensity and energy savings, a simulation was carried out by turning off half the light points in the workspace, especially the light points around the building openings. The simulation results show that the average integrated lighting quality meets the minimum lighting requirements and can save energy usage by up to 50%. Keywords: energy efficiency; integration lighting; workspace
Fluid Flow Through Serieal Parallel Circular Cylinder Arranged In Tandem Nur Ikhsani; Nasaruddin Salam; Luther Sule
EPI International Journal of Engineering Vol 4 No 1 (2021): Volume 4 Number 1, February 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022021.07

Abstract

The Fluid flow through circular cylinders in serieal parallel positions arranged in tandem were analyzed computationally and experimentally at nine levels of Reynolds number, ReD 34,229; 47,921; 61,612; 75,304; 88,996; 102,688; 116,379; 130.071 and 143,763 The variation in the ratio of the distance between the front and rear cylinders is determined as M / D = 0.3, M / D = 0.5, M / D = 0.7, M / D = 0.9, and M / D = 1.1. While the distance between cylinder number 2 and 3 we set constantly and determined as N / D = 5 cm. The results displayed are flow velocity with computational approach validated by flow visualization, computational pressure contour, and drag coefficient through experimental testing. The results showed that the smallest boundary layer thickness was obtained in the model with a distance ratio of M / D = 2.5, using both computational and experimental approaches. The characteristics of the minimum pressure contour and the lowest drag coefficient (CD) = 0.7572 were also obtained at the ratio of the distance M / D = 0.25 and at upstream speed of 21 m / s
Comparison the Strength of Midship Structures With Margin Plate and Without Margin Plate Andi Ardianti; Rosmani Munandar; Haryono Haryono; Ganding Sitepu; Hamzah Hamzah
EPI International Journal of Engineering Vol 4 No 1 (2021): Volume 4 Number 1, February 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022021.09

Abstract

Margin plate is a part of bottom construction that joint the floor and frame construction of the ship, so the inner bottom plate will be installed cut off on the margin plate. Lately the bottom construction of the ship tends not to use the margin plate. The ship is currently built with an inner bottom plate continuously from the left side to the right side of the ship.This study aims to determine the transversal and longitudinal strength ratio of ships with and without margin plate. The analysis was carried out by using Finite Element Method so-called ANSYSTM. The result shows if the loadvariatied 0.2 x maximum load on the calculation of the transverse strength of the ship, the stress value on the ship model with a margin plate was 9.6242 (N/mm2) and on the ship model without margin plate was 8.4739 (N/mm2) under conditions 100%. The results of the comparison due to bottom load averaged 15.82%. The difference in stress due to the effect of deck loads was an average of 13.49% while the effect of side loads was on average 8.74%. The longitudinal strength of the ship was also a varied of every increase of 0.2 x maximum moment with a review point of meeting between bottom plate and bilga plate for the ship model without margin plates using the Multi Point Constraint (MPC) method looking for results in sagging conditions of 12,443 (N / mm2) and the hogging condition was -11.045 (N / mm2) at 100% x maximum moment load conditions. So that the ship model with a margin plate sagging condition was 23,189 (N / mm2) and hagging condition was -20,585 (N / mm2). The results showed the stress that occurred in the ship model without using margin plate was better to withstand the transverse and longitudinal strength of the ship compared to the ship model with the margin plate.
Calculation and Simulation of Aluminium Alloy Flange Reducer Cast Using Resin Sand Mold Andi Ari Putra; Muhammad Syahid; Andi Amijoyo Mochtar
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/epi-ije.082021.01

Abstract

One of the causes of defects in casting is due to poor gating system design. In conventional casting methods, the gating system design process is carried out by trial and error to find the best design results. Computer modeling and simulation offer process design in a much faster time, and at much less cost, compared to conventional methods. The gating system design approach with a combination of well calibrated simulation software can avoid defect before casting. Casting simulation helps to visualize the phenomena of filling, molten metal solidification, and shrinkage porosity. The resulting casting simulation can be displayed in graph variants at specific nodes with line graphs or numerical numbers manually. This study discusses the simulation of casting a flange reducer from aluminum alloy material using a resin sand mold. The initial dimensions of the gating system used are sprue of 14.5 x 8.4 x 180 mm, runner 147 x 10 x 5.5 mm, ingate 80 x 10 x 5.5 mm with a bottom gate channel system. Total of dominant porosity that occurs using the initial gating system is 65.31 % and show the undirectional solidificiation behavior. After modifying the gating system and increasing the riser size, the simulation results show directional solidification behavior starting from the thinnest part to the thickest part and ending at the riser. The shrinkage porosity can compensate with the total of porosity is 57.60 % at the riser . Modification of the channel system is required to obtain a sound casting or porosity free.
The Effectiveness of Utilizing Non-Green Public Space in Untia Fishermen Settlement Andi Edy Satar; Idawarni 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.082021.06

Abstract

Public Space in a settlement will be effective and useful if it has three intrinsic values, namely democratic, meaningful and responsive. Then the existence of people and how they play a role in space is important in reviewing the public nature of a space. The effectiveness of a public space can be assessed from the level of utilization by the community on the types of activities and social interactions of the people in it. Currently, the use of Non-Green Public Space is still not in line with expectations, namely the realization of a comfortable, productive and sustainable space, marked by the lack of community social activities in the Untia Fisherman Settlement Non-Green Public Space (NGPS). The purpose of this study was to evaluate the effectiveness of the use of Non-Green Public Space in the Untia Fisherman Settlement in the form of Taman Bermain Delta and Plaza Park. The research method used in this study uses descriptive qualitative research methods because it describes the research location at the time of observation and compares standards and or theories with the facts of the availability of Non-Green Public Space (NGPS) in the settlements using the Good Public Space Index (GPSI) analysis tool. From the results of the analysis, it was found that the availability of the Taman Bermain Delta Non-Green Public Space in the Untia Fisherman Settlement was related in terms of utilization, as well as in terms of accessibility to the Non-Green Public Space, elements (Comfortable, Relaxation, Passive and Active engagement Discovery), as well as the availability of supporting facilities and infrastructure were still lacking. both in terms of quality and quantity. Re-effectiveness of the function and nature of the existence of the Non-Green Public Space in the Untia Fisherman Settlement requires cooperation from various parties.
Analysis of the Floodlight Lighting Effect on the Visual Quality of the Phinisi Tower Building Facade Mahsun Wahid; Nurul Jamala
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.082021.07

Abstract

Lighting is one of the important factors to recognize the environmental situation. Lighting is needed by humans, with good lighting we can visually recognize objects clearly. The suitability of lighting with recommended light standards and the arrangement of building facades in accordance with the distribution of lighting will have an impact on the visual quality of a building. Along with the development of technology and information, people's lifestyles are increasingly advanced and developing. Likewise, the function of artificial lighting, which used to only function as lighting at night, has now developed into an important part of the aesthetic forming factor of a building. So there is a need for a survey to see how big the difference in perception of the visual quality of lighting is by using floodlights on the Phinsi Tower. The survey method of data collection used quantitative and qualitative research methods. Mixed methods are divided into quantitative methods (research using questionnaires and SPSS data processing) and qualitative (respondent perception, interview and observation). Based on the results of surveys and tests conducted on 17 simulation models, different results were obtained in each test model. This explains that the use of floodlights greatly influences the visual quality of the Phinisi Tower facade. Of the 17 lighting simulation models that have been made, Model 17 has the highest average score of 5.08 and the lowest is Model 10 of 2.53 (a rating scale of 1 to 7).
The Function, Space, Form and Meaning of the Traditional House of Tolaki Tribe in Konawe, Southeast Sulawesi Nidia Islamiah; Ria Wikantari; Asniawaty Kusno
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.082021.10

Abstract

The architecture of traditional house of the Tolaki tribe has characteristics that indicate the activities, identity and socio-cultural values of the community. This study aims to examine the function, space, form, and meaning of the traditional house of the Tolaki tribe. Field surveys were conducted at Meluhu Village in Meluhu District and Asambu Village in Unaaha District of Konawe Regency. This research is qualitative with phenomenological method. Data were collected through field observations, in-depth interviews, and document studies. The objects of research were is Laika Mbuu and Laika Aha houses which were selected from nine forms of Laika in Konawe Regency using purposive-criteria sampling technique. Data were analyzed descriptively, then the results were discussed and associated with relevant theories. The result reveals that the function of Laika Mbuu and Laika Aha is formerly the residence a Mokole (King) and a place to hold traditional ceremonies. However nowadays Laika Mbuu has become a communal gathering place and other public purposes, whereas Laika Aha become a customary house for ceremonial events. The spatial arrangement of Laika Mbuu has no partition so that the local community carries out all activities in one open space, whereas Laika Aha contains partitions that divide the space into several rooms. Both the Laika Mbuu and Laika Aha have a rectangular building shape. The square shape on the building facade shows a bottom container called Kalo Sara, which is a set of objects as symbol of social class and has a meaning as customary law in the Tolaki community. This research concludes that both the Laika Mbuu and Laika Aha have similar function and form, however different spatial arrangement. Both the Laikas express many symbolic meanings, among others that the house as symbol of a human body, and the residents symbolize organs of the human body, so that once the house is built and filled, it must try to protect itself from all obstacles and calamities.
Prototype Self-Adaptive Traffic Light Control System Using Cameras Channareth Srun; Saran Meas; Sok Oeun Un; Saokun Khim; Virbora Ny
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.082021.04

Abstract

Cambodia is a developing country with rapid development. More vehicle usage on the road increased, this leads to more traffic problems. The traditional traffic light and traffic police officer help solve the problem at a level and limited conditions. For a better improvement, the smart traffic light is a good solution that can adapt to the real-world environment. There are four cameras are used to capture and analyze the vehicle traffic to control the modes of the traffic light. This method gives the improvement over the limited time of the traditional traffic light. This smart traffic light comes with three-term mode conditions including normal mode, camera mode, and night mode.

Page 11 of 17 | Total Record : 168

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