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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 13 Documents
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Search results for , issue "Vol 6 No 2 (2019): October 2019" : 13 Documents clear
The Hardness of Aluminum Oxide Surface in Anodized Coloring Under Low Voltage Buwono, Haris Puspito; Hadi, Syamsul; Muzaki, Mochamad; Subagiyo, Subagiyo; Agustriyana, Lisa; Hadi, Samsul; Nurchajat, Nurchajat
INTEK: Jurnal Penelitian Vol 6 No 2 (2019): October 2019
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (367.08 KB) | DOI: 10.31963/intek.v6i2.1522

Abstract

Coloring of aluminum oxide on the Aluminum type AA1100, which is the typical type for household appliances and purposes, through anodizing coloring process by the blue color of commercial printer ink had been successfully performed. The blue color was well adhered and was not easy to be removed by physical treatment such as wiping. The anodize coloring process includes chemical cleaning of aluminum surface, the formation of pores in the sulfuric acid solution at a specific current and a specified duration of time, coloring and closing the pores via sealing. It also shows the anodizing process increases aluminum oxide surface hardness increased by applying higher current density, and longer duration time of the process. The aluminum oxide hardness was in harmony to the duration of time processing, and current density; however, not in line to a concentration of the solution. The maximum hardness of the aluminum oxide layer obtained is 50 kg/mm2. The relation of current density and voltage, the effect of current density and sulfuric acid concentration toward aluminum oxide hardness were analyzed. Moreover, the difference of aluminum oxide hardness of the front side and backside to cathode also discussed.
Klasifikasi Mutu Buah Pala (Myristica Fragrans Houtt) Berbasis Pengolahan Citra Menggunakan Metode Deep Learning Arsitektur Faster R-CNN Subhan, Muh; Basri, Hasan
INTEK: Jurnal Penelitian Vol 6 No 2 (2019): October 2019
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1742.361 KB) | DOI: 10.31963/intek.v6i2.1566

Abstract

Fakfak is the number one nutmeg producing area in Indonesia with a land area of around 16,011 Ha. Nutmeg production is projected to continue to increase until 2020, recorded in 2011 the production of nutmeg in particular reached 12,884 tons or 25 percent of the total Indonesian nutmeg production. This increase was not followed by an increase in market share. One solution to get a wider nutmeg market is exports. But currently not all requests for nutmeg can be fulfilled, because the quality of the nutmeg does not meet the requirements requested. One factor is the surface defects in the nutmeg skin that affects the quality of the fruit, especially the appearance of the fruit. The sorting of nutmegs has so far been using conservative methods, namely by observation based on experience (self-taught). This manual method is felt to be less effective because it depends on the conditions and conditions of the sorting staff, different perceptions between each sorter, takes a long time, requires large costs and involves many workers. To deal with these problems, our previous research developed a method for classifying nutmeg seeds, using image processing methods with color and shape parameters combined with a neural network and sigmoid convolution classification algorithm as a validation method, an accuracy of 87%, but this has not been said to be optimal so we try to use the same approach with the latest method improvements using the R-CNN Faster obtained the best accuracy of 95% with a learning rate of 4000 with a processing time of 0.04 minutes per second.
Kajian Awal Adosrben Abu Kayu Terhadap Methylene Blue HR, Yuliani; Tri, Hartono; S, Puspita; Juliati, Juliati; A.A, Musfirah; A.N.P.Z, Isma; A.I, Ida
INTEK: Jurnal Penelitian Vol 6 No 2 (2019): October 2019
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (726.208 KB) | DOI: 10.31963/intek.v6i2.1570

Abstract

This study aim the adsorption capacity of wood ash adsorbent from Makassar coto wood (ACM) and wood ash in the air cooking (AMA) of the blue methylene solution and its characteristics. ACM is activated by NaOH 3M and NaCl 0.85 M, to improve its performance as an adsorbent. ACM without permission and activation as well as AMA of 0.25 grams were tested against 50 ml of methyl blue with concentrations of 10, 20, 30, 40 and 50 ppm. Adsorption runs for 1.5 hours using a shaker at a speed of 500 rom. Adsorbent and adsorbate use filter paper then the absorbance of the filtrate is taken to determine the equilibrium concentration (Ce) of methylene blue. The maximum adsorbent capacity (qm) is determined using the Langmuer equation for the administrator's ACM adorbent type and without activation with AMA. Other tests consisted of adsorbent characteristics consisting of ACM and AMA compositions. The results of the study showed differences, namely ACA having a composition of 28.15% Silica (Si), 20.86% Ca and AMA namely 30.68% Si, 15.29% Ca. The maximum adsorption capacity (qm) of ACM is 12.37 mg / g and for AMA is 10.29 mg / g. Activation of 3M NaOH ACM has an adsorption capacity (qm) of 13.01 mg / g and activation of 0.85 M NaCl which is 15.15 mg / g.

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