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INTEK: Jurnal Penelitian
Published by Politeknik Negeri Ujung Pandang
ISSN : 23390700     EISSN : 26155427     DOI : -
Core Subject : Science, Engineering,
Computer Science & IT Engineering
INTEK is a journal managed by the Journal and Publication Development Unit of Ujung Pandang State Polytechnic, which is published twice a year, in April and October. The journal INTEK has also been indexed. The INTEK Journal accepts research scripts in the fields of technology and engineering such as: Electrical, Mechanical, Civil and Chemical Engineering.
Arjuna Subject : Umum - Umum
Articles 14 Documents
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Search results for , issue "Vol 10 No 1 (2023): April 2023" : 14 Documents clear
Characteristics of AC-WC Asphalt Concrete Mixtures with Polystyrene Addition Fahmi, Rizky Hadijah; Erdiansa, Andi; Nursamiah, Nursamiah; Fattah, Abdul
INTEK: Jurnal Penelitian Vol 10 No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v9i2.4229

Abstract

The top layer of pavement that functions as a wear layer is called AC-WC/ Laston. Improving the quality of flexible pavement continues to be developed in order to create transportation support facilities that are safe, strong and durable, but still economical. The use of additives is one way out that can be done in order to get a high quality product. The purpose of this research is to identify the optimum asphalt content to be used in the manufacture of polystyrene asphalt mixtures and to determine the characteristics of asphalt mixtures using polystyrene additives. The method used was to add polystyrene in the form of styrofoam which had previously been dissolved using gasoline into hot asphalt with a percentage of polystyrene mixture of 3.0%, 3.5%, 4.0%, 4.5% and 5.0% of the optimum asphalt content used. Based on the results of testing specimens with additional polystyrene, VIM and VMA values increased at levels of 3.0% to levels of 4.5% exceeding the upper limit of VIM specifications, but still within specifications. The stability value increased along with the increase of polystyrene from 3.0% to 5.0%, where this value meets the specifications. The flow value increases from 3.0% to 3.45% levels exceeding the upper limit of the specification then decreases after 3.45% levels to 5.0% levels where the flow value meets specifications. The conclusion that can be drawn is that the addition of polystyrene mixture in AC-WC can increase the hardness level of the Laston mixture.
Inverse Kinematic of 1-DOF Robot Manipulator Using Sparse Identification of Nonlinear System Darajat, Anisa Ulya; Murdika, Umi; Repelianto, Ageng Sadnowo; Annisa, Resty
INTEK: Jurnal Penelitian Vol 10 No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v10i1.4202

Abstract

Robot Manipulator is the most robot used in industry since it can act like a human arm that can move objects. Research on robot manipulator has been widely carried out in various problems such as control systems, intelligence robots, degrees of freedom, mechanics-electronics systems and various other problems. In control systems there are studies to design of robot motion through kinematics. However, modeling the kinematic motion which has nonlinear characteristics will be more difficult if the number of degrees of freedom increases. To overcome this problem, this research will proposed sparse regression to modeling the kinematics of a robotic arm with the black box principle modeling. The results obtained indicate that the method The proposed one has the ability to identify robots manipulator with a fitness score of up to 100%. This matter shows that the proposed method can modeling the kinematic inverse of the manipulator robot without through complex calculations. From this research is expected can provide other research opportunities related to identification kinematics with the identification system method
Papaya Fruit Quality Classification Based on Lab Color and Texture Features Using Artificial Neural Networks (ANN) Andayani, Dyah Darma; Rafii, Andi Noer Aksha; Mahdar, Kaerurrijal; Ahmad, Winda Andrayani; Mustamin, Mustamin
INTEK: Jurnal Penelitian Vol 10 No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v9i2.4246

Abstract

The process of sorting the quality of papaya fruit is a postharvest problem. So far, humans still do the quality sorting process conventionally or manually. It certainly has weaknesses and limitations, which require a large workforce, and the level of human perception of the quality of papaya varies. Several studies have been carried out regarding the classification of papaya fruit quality, but these studies have accuracy that can still be improved. Therefore, in this study, it is proposed to determine the quality of papaya fruit based on LAB colour and texture features using an Artificial Neural Network (ANN) algorithm. This research consists of six stages: image acquisition, pre-processing, segmentation, morphology, feature extraction and classification. The classification process for the training stage produces the highest level of accuracy in three training scenarios; namely, two techniques have 100% accuracy and 99.58% in the third scenario. Based on the best training scenario selected, the testing process produces 98.88%, the highest accuracy rate with a misclassification error of 1.12% and 69 seconds of computing time. These results indicate that the proposed method can accurately classify papaya quality based on LAB colour and texture features.
An Overview of Commonly Used Steel Beam-Column Connection in Indonesia for Low-Rise Building Yuana, Prima Sukma; Moestopo, Muslinang; Kusumastuti, Dyah; Pratiwi, Naomi
INTEK: Jurnal Penelitian Vol 10 No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v9i2.4135

Abstract

The Indonesian seismic provision for steel structures was initiated in 2002. The use of steel has also been increasing as a choice of structural material since then. However, there are still many weaknesses in the seismic design of steel structures that have been carried out so far. A lot of beam-column connections in steel buildings in Indonesia use a haunch in a moment-resisting connection system. Haunched systems are not described in AISC 358 as permitted connections for earthquake-resistant buildings. Recently, Europe publishes European Prequalified Steel Joints (EqualJoints). There are four types of connections discussed, and one of them is the haunched type connections. The haunched connection meets the seismic requirements to be suitable for use as an earthquake-resistant connection in Europe. This can be used as a reference if we are going to design a haunched connection in Indonesia. However, special attention should be paid to the details. The bolt configuration, the thickness of the end plates, and the shape of the haunch are not like those commonly used in Indonesia, there must be improvements to be adjusted in EqualJoints. So that the performance of the connection against earthquakes becomes more guaranteed.
Comparison of the Effect of Variable Helix Angle Geometry Tools on CNC Vertical Milling Machines on Chatter using a microcontroller Based on SLD Simon, Christof Geraldi; Hardinsi, Festo Andre; Paliling, Formanto
INTEK: Jurnal Penelitian Vol 10 No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v10i1.4265

Abstract

Vibrations that often occur in the production process using CNC milling machines are very important to take into account. These vibrations can cause dimensional changes and affect the level of quality produced, so the effect of chatter vibrations on production becomes a major problem in the milling process. Vibration values are determined using SLD graphs experimentally, analytically and semi-analytically. The material used in this study is SS 304, MPU 6050 which is connected to Arduino Uno using LabVIEW 2019 student edition software in the form of FFT charts. Data collection using experimental methods, tool geometry parameters are tool geometry VHA 35/38 degrees and VHA 36/38 (Degrees), Spindle Speed 2000,2500,3000 (RPM), Depth Of Cut 0.4, 0.7, 1 (mm), and Feed Rate 100, 125 and 150 (mm/s). The results of the SLD study used a variable helix angle of 35/38 degrees at a feed rate variation of 100 mm / minute chatter at cut depths of 1, 0.7 and 0.7 mm, at a feed rate variation of 125 mm / minute chatter at a cut depth of 0.7, 1 and 0.7 mm. At feed rates of 150 mm/min at cut depths of 1, 1, and 0.7 mm with spindle speeds equal to 2000.2500 and 3000 RPM. While VHA results of 36/38 degrees at a feed rate of 100 mm / minute experienced chatter at cut depths of 0.7.1 and 1 mm, at feed rates of 125 mm / minute chatter at cut depths of 1.1 and 0.7 mm. At a feed rate variation of 150 mm/min chatter at cut depths of 1.1, and 0.7 mm with the same spindle speeds of 2000.2500 and 3000 RPM.Keywords : Chatter, VHA, SLD, microcontrolle, FFT
Processing of Coal into Coke with the Pyrolysis Method Nurdin, M Ilham; Damayanti, Jeanne Dewi
INTEK: Jurnal Penelitian Vol 10 No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v10i1.4269

Abstract

Utilization of coal as a direct fuel can cause environmental problems such as solid waste in the form of fly ash (flyash). This study aims to process coal into coke using the pyrolysis method in the hope of increasing the quality and efficiency of coal that is safe for the environment. This research was conducted in 3 stages. The first stage was carried out by crushing coal, sieving coal, testing proximate and ultimate coal, and analyzing the calorific value of coal. The second stage is carried out by preparing coal, pyrolysis of coal using a set of pyrolysis tools. Pyrolysis was operated at ± 400oC using a stainless reactor with a reactor volume capacity of 16 liters. Pyrolysis is carried out until no more liquid smoke is produced. The third stage was carried out by crushing the coke product, testing the proximate and ultimate coke (moisture content, ash content, volatile matter, fixed carbon, total sulfur), and analyzing the calorific value of the coke. The results showed that the quality of coal could be improved by processing it into coke using the pyrolysis method as evidenced by a decrease in water content, a decrease in volatile matter, an increase in fixed carbon, and an increase in calorific value
Controlling model of dispersed leachate in the landfill site of Tamangapa Makassar Indonesia Badaruddin, Sugiarto
INTEK: Jurnal Penelitian Vol 10 No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v10i1.4278

Abstract

The Tamangapa landfill, the only operational landfill in Makassar City since 1995, is the subject of this study. The objective is to determine the direction of leachate flow generated by the waste in the Tamangapa landfill and simulate remediation management for the dispersed leachate, which has contaminated the groundwater flowing into community wells. Modflow + MT3DMS software was employed to model the groundwater flow direction, leachate dispersion, and pumping simulations. The concentrations of interest in this research were iron (Fe) and manganese (Mn). The modeling results revealed that the leachate from the Tamangapa landfill spreads from northwest to southeast, following the groundwater flow direction, and contaminates the community wells. Subsequently, a remediation management plan was developed using modeling techniques, specifically through pumping simulations with a pumping rate of 1500 m3/day. This pumping process was conducted until all the contaminated leachate in the community wells was removed, which was estimated to require a pumping duration of 15 months.
Real-time Ball Detection and Tracking using Raspberry PI Aryani, Dharma; Dewi, Kartika; Ta.by, Fery; Sanggaria, Evita Putri
INTEK: Jurnal Penelitian Vol 10 No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v10i1.4301

Abstract

This paper presents a real-time system for ball detection and tracking system which is reliable in any conditions. Images from the webcam are processed by openCV library running on a Raspberry Pi to move the camera pan and tilt servo and two DC motors to drive the robot body using the Arduino Nano microcontroller.  The webcam is integrated in a robot prototype to represent the wheel football robot type. The results show that a ball tracking webcam system is obtained with the capability to detect a ball with a diameter of 17cm within a maximum distance of 200 cm, a stable ball reading when the light intensity is at 32 lux and above. Furthermore, the experimental results demonstrated the system’s robustness in detecting and tracking ball in different distance and ligthing conditions.
Utilization of Green Betel Leaf as Adsorbent of Lead and Copper Metals in Artificial Wastewater Syahrir, Muallim; Yasser, M; Rosalin, Rosalin
INTEK: Jurnal Penelitian Vol 10 No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v10i1.4348

Abstract

Green betel leaf contains phenolic compounds that can bind metal ions. The purpose of this study was to determine the effect of variations in the mass of green betel leaf and stirring time based on the efficiency and adsorption capacity of lead and copper metals in artificial wastewater. Adsorption process using the stirring with a magnetic stirrer. The variation used is the stirring time of 30 and 60 minutes and the mass of the adsorbent is 25,30,35, 40 grams. Artificial wastewater is made from 1 gram of each Pb(NO3)2 and CuCl2.2H20 in 500 ml of aquadest. Analysis of the metal using the AAS (Atomic Absorption Spectrophotometry). The results of the analysis showed that the optimum adsorption of lead metal was at a mass of 30 grams of betel leaf and a stirring time of 1 hour, where green betel leaves were able to adsorb 99.96% of lead metal, from a Pb level of 6435 ppm to 2.48 ppm. While the optimum results for adsorption of copper metal were 35 grams of betel leaf mass and 30 minutes of stirring time, where green betel leaves were able to adsorb 49.83% copper metal, from 158 ppm Cu level to 79.27 ppm.
The quality of liquid organic fertilizer made from moringa leaf stems as influenced by the concentration of microbes and the duration of fermentation Paramita, Vilia Darma
INTEK: Jurnal Penelitian Vol 10 No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v10i1.4302

Abstract

Liquid organic fertilizer from moringa leaf stems was produced through a fermentation process. In this study, moringa leaf stems were utilized by adding banana stems and EM4. The use of moringa leaf stems and banana stems in liquid organic fertilizer was expected to enhance macro-nutrients in the soil, such as nitrogen, phosphorus, and pH. The objective of the research was to determine the optimum conditions for producing liquid organic fertilizer. The experimental variables included adding EM4 starter concentrations of 1%, 3%, and 5% (v/v) to the fermentation substrate and fermenting it for 7, 14, and 21 days. The analysis results indicated that the nitrogen, phosphorus, and pH content of the liquid organic fertilizer met the standards. The optimum conditions were achieved during a 14-day fermentation period with a 5% concentration of EM4, resulting in nitrogen content of 10.06%, phosphorus content of 2.05%, and pH level of 7.5.

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