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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 11 Documents
 1   2 
Search results for , issue "Vol 4 No 1 (2017): April 2017" : 11 Documents clear
Design Controller of Pendulum System using Imperialist Competitive Algorithm Lastomo, Dwi; Setiadi, Herlambang; Djalal, Muhammad Ruswandi
INTEK: Jurnal Penelitian Vol 4 No 1 (2017): April 2017
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (898.23 KB) | DOI: 10.31963/intek.v4i1.94

Abstract

Due to development of technology in recent years, complexity and nonlinearity of mechanical and electrical system are increasing significantly. Inverted pendulum is nonlinear system that has become popular in recent years. However, inverted pendulum is nonlinear and unstable system. Therefore appropriate design controller of inverted pendulum system is crucial. Hence, this paper proposed, design of inverted pendulum system based on imperialist competitive algorithm (ICA). In order to design the controller, dynamic model of inverted pendulum system is used. Time domain simulation is used to address the controller performance. From the simulation result, it is found that imperialist competitive algorithm can be used to design inverted pendulum system controller.
Analisis Sifat Fisik dan Mekanik Poros Berulir (Screw) Untuk Pengupas Kulit Ari Kedelai Berbahan Dasar Aluminium Bekas dan Piston Bekas Wisnujati, Andika; Hafiz, Lalu Alpan
INTEK: Jurnal Penelitian Vol 4 No 1 (2017): April 2017
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (373.177 KB) | DOI: 10.31963/intek.v4i1.99

Abstract

Aluminum alloys in this study using a mixture of aluminum profiles and former piston. Former piston is used to get the high enough of element Si. The addition of TiB element (Titanium-Boron) as much as 0.02% at the time of casting expected to improve the mechanical and physical character of aluminum, so that expected the aluminum alloy has a strength that is much better than without the addition of any element. Aluminum alloy to manufacture screw will be casted by using sand molds on three types of variations mold temperature 200oC, 300oC and 400oC. The Test were conducted to determine the mechanical properties of the aluminum alloy and physical that are : tensile test, hardness test, and metallographic with an optical microscope. The maximum test result occurred in Al-Si alloy material with TiB addition 0.02% and a heating temperature mold 400oC produces maximum tensile stress of 628.86 N / mm², while for Vickers Hardness Number (VHN) gives the figure of 114 kg / mm2; and for the results obtained from the data metallographic structure formed hypereutectic silicon which form the primary silicon phase. That phase provides high wear resistance. Finally, it is evident that the Al-Si alloys mentioned above can improve the properties of aluminum to manufacture a screw.
Analisis Pengaruh Konsentrasi Larutan Alkali Terhadap Perubahan Diameter Serat Sabut Kelapa Arsyad, Muhammad; Salam, Abdul
INTEK: Jurnal Penelitian Vol 4 No 1 (2017): April 2017
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (211.675 KB) | DOI: 10.31963/intek.v4i1.90

Abstract

Abstract—The goals of this study was to determine the effect of alkali concentration in the soaking coconut coir fiber (S2K) to changes in coconut fiber diameter. Stages of implementation of the study are (1) the measurement of the diameter of S2K before soaking, (2) immersion S2K in an alkali solution (NaOH) at a concentration of 5%, 10%, 15%, 20%, and 25% for 3 and 5 hours, ( 3) after being soaked, S2K removed and rinsed with distilled water, (4) was dried in a room temperature of 30±2°C for 5 days, (5) the measurement of the diameter of S2K after soaking with digital microscope. Based on the results of tests performed concluded that (1) immersion in an alkali solution resulted in a reduction of the diameter of S2K, (2) on soaking 5 hours at a concentration of 15% NaOH solution obtained reduction diameter S2K largest percentage of 56.08%. Keywords: natural fibers, the concentration of alkali, wettability.
Pengembangan Peralatan Simulasi Peralatan Aliran Daya Berbasis Fast Decoupled-Dependent Newton-Raphson dengan Program Interface-Based Delphi Saini, Makmur; Tandioga, Remigius; Pangkung, Andareas; Yunus, A.M Shiddiq
INTEK: Jurnal Penelitian Vol 4 No 1 (2017): April 2017
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (533.757 KB) | DOI: 10.31963/intek.v4i1.91

Abstract

On one hand, the particular objective of this research is to yield the software program in order to control efficiently the important aspects in electric power systems which can be implemented in industries. In the other hand, the longterm objective is to extend the curriculum, syllabi, laboratory facilities, and to improve the abilities and qualities of graduates continuously either within State Polytechnic of Ujung Pandang or outside. Method used to achieve these objectives is making, design and implementation which will be last for two years. Simulator for generation system in the first stage of the research is balanced six-phase system yielded from the circuit of 3-one phase centre-tap transformers of 220/18 V, 15 A, as the supply of low-tension 3-phase system, which feeds six one-phase transformer of 18/220 V, 20 A, whose output as another balanced 3-phase system with 220 V/phase. From balanced 6-phase system, a balanced 3-phase will simulate generator number 1 and another balanced 3-phase will simulate that of number 2. Interface which is based on Delphi program is to switch all transmission lines. The result of experiment shows that voltages in the two generator busbars experience the significant drop voltage if they work separately, that are 20.5% - 36.4% and 20.5% - 63.6% for generator number 1 and number 2 respectively, for one to three load busbars operated sequentially, which also reveals that greatest voltage drop occurs in the generator busbar with most lines supplied. Simulating the two generators working simultaneously, then voltage drops are more significant, that are 65.9% - 72.7% and 65.9% - 79.5% for generator number 1 and number 2 respectively, for one to three load busbars operated sequentially, which also proves that transformer bank as generator simulator needs to increase its current capacity.
Studi Pengaruh Sudut Belokan Sungai Terhadap Volume Gerusan Djufri, Hasdaryatmin
INTEK: Jurnal Penelitian Vol 4 No 1 (2017): April 2017
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (554.548 KB) | DOI: 10.31963/intek.v4i1.95

Abstract

Scouring occurs along the streams and generally increases in their bend areas. This occurence threaten the stability of buildings and facilities built around those areas. This study was conducted by experimental model tests in a laboratory using an artificial channel made of sand with diameter of 0,47 mm and the sand layer density of 1,47 gr/cm3. To assess the effect of river bends on the extent of scours, the water flow was simulated on the artificial channel in 9 times i.e.; 3 variations in the angle of river bends (α) and 3 variations in the flow discharge (Q) for each river bend variation. This study revealed that the volume of scours positively correlated to the angle of river bends. The volume of scours decreased more 20% when the angle of river bends decresed from 60º to 30º. The increase of the flow discharge also enlarged the volume of scours more than 100% at the river bends with small angles
Studi Numerik Steady RANS Aliran Fluida di Dalam Asymmetric Diffuser Klistafani, Yiyin
INTEK: Jurnal Penelitian Vol 4 No 1 (2017): April 2017
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (355.069 KB) | DOI: 10.31963/intek.v4i1.100

Abstract

Research on fluid flow becomes a necessity to develop technology and for the welfare of human beings on earth. One of them is study of fluid flow in the diffuser. The example of diffuser application is used as a flue gas duct in the car or motorcycle. In addition, diffuser is also applied in air conditioning systems. Diffuser is a construction that able to control the behavior of the fluid. The increasing of cross section area in the diffuser will generate a positive pressure gradient or also called adverse pressure gradient (APG). The greater APG that happens, the greater energy required by the fluid to fight it, because APG will lead to separation. This study aimed to evaluate the numerical fluid flow in the asymmetric diffuser with divergence angle (θ) = 10 ° (upper wall) and widening one vertical side (α) of 20 ° (front wall). The Reynolds number is 8.7 x 104 by high inlet diffuser and the maximum velocity at the inlet diffuser. Turbulence models used are standard k-ɛ, realizable k-ε, and shear stress transport (SST) k-ω. Numerical study of steady RANS used Fluent 6.3.26 software. Results of numerical visualizations show that huge vortex established in diffuser, that’s why performance of diffuser is not optimal. In addition the location of separation point shown by SST k-ω is earlier than other turbulence models (standard k-ε and realizable k-ε).
Analisis Kuat Tekan Beton yang Menggunakan Pasir Laut sebagai Agregat Halus pada Beberapa Quarry di Kabupaten Fakfak Imran, Imran; Yunus, Muhammad
INTEK: Jurnal Penelitian Vol 4 No 1 (2017): April 2017
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (381.688 KB) | DOI: 10.31963/intek.v4i1.96

Abstract

SNI 03-6861-1-2002, states that the fine aggregate used in concrete structures should use river sand. However, the use of fine aggregate in Fakfak regency in general is still dependent on sea sand potential is quite large. The purpose of this study were: 1) determine the characteristics of sea sand in Fakfak regency as a component of the concrete mix; 2) determine the strength of concrete resulting from the use of sea sand. This research is an experimental research laboratory by means of sample testing and analysis of the characteristics of aggregates and concrete compressive test using a compression test machine. Results of testing the characteristics of fine aggregate to quarry in Fakfak regency consisting of quarry Kampung Seberang, quarry Kampung Sungai, quarry Tanjung Wagom and coarse aggregate from the quarry Kayuni can generally be used for a mixture of concrete for eligible characteristics of concrete aggregate but fine aggregate (sand) it is best to Tanjung Wagom quarry because of the fineness modulus 2.93 and included in zone 2. Compressive strength characteristics resulting from the quarry Kampung Seberang 122.84 kg/cm2 quarry Kampung Sungai 129.59 kg/cm2 and quarry Kampung Tanjung Wagom 144.27 kg/cm2 of the planned concrete quality 250 kg/cm2 or down 50.86% , quarry Kampung Sungai 48.16% and quarry Tanjung Wagom 42.29% down or strength is only reached at quarry Kampung Seberang 49.14%, quarry Kampung Sungai 51.84% and quarry Tanjung Wagom down 57.71%
Identifikasi Kandungan Kolesterol pada Udang Kelong Basah Menggunakan Metode Gas Chromatography-Mass Spectroscopy (GC-MS) Yasser, M
INTEK: Jurnal Penelitian Vol 4 No 1 (2017): April 2017
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (680.981 KB) | DOI: 10.31963/intek.v4i1.93

Abstract

This study aims to identify the content of cholesterol in Kelong shrimp that have been preserved with ice cubes. The identification of cholesterol is done using Gas Chromatography-Mass Spectroscopy (GC-MS). The result of Chromatograms from analysis using GC-MS that has been compared to a standard cholesterol showed that shrimp Kelong which have been preserved ice cubes contain cholesterol.
Studi Sistem Informasi Monitoring Pembelian Material (Studi Kasus: K5-Project IKPT Toyo) Zain, Abdul; Sutanto, Hari
INTEK: Jurnal Penelitian Vol 4 No 1 (2017): April 2017
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2021.522 KB) | DOI: 10.31963/intek.v4i1.97

Abstract

Kaltim-5 Factory is the biggest plant for Ammonia and Urea in Indonesia. Construction of this plant was executed by Consortium IKPT-TOYO. Along the construction stage, procurement for materials were absolutely needed, and Procurement Department IKPT-TOYO has responsibility to handle materials procures. System that currently used is still using Microsoft Excel by manual input for each steps beginning from inquiry stage, getting vendor quotation until PO issued. This method still has some problems occurred such as uncontrolled stock and material requisition, also inquiry sheet which can be easily lost. In order to support the completion of K5-Project that needs more materials, therefore it needs a system that can ease and also improve the work of Procurement Department. Based on this background, research study to resolve this problem is held. This system gives status information and it is integrated to the each control step smoothly. System development used on this program is SDLC with Waterfall model. Moreover, testing methods is using Black Box system. The design of this monitoring information system describes a work order application by using PHP Macromedia Dreamweaver 8, AppServ 2.10.2 as web server and MySQL as database. Having testing the application, the result of this study shows that the application is able to improve the data processing of material procurement with minimum of error and high accuracy.
Studi Pendahuluan Ekstraksi Bertingkat Minyak Biji Mangga Arumanis (Mangifera Indica) Menggunalan Pelarut N-Heksan dan Etanol Masúd, Fajriyati; Puspitasari, Puspitasari
INTEK: Jurnal Penelitian Vol 4 No 1 (2017): April 2017
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (338.99 KB) | DOI: 10.31963/intek.v4i1.92

Abstract

Mango seeds containing oil of about 20-37%, is one source of vegetable oil that has not been touched. Mango seed oil contains polyphenols, so the potential is developed as a functional food. Mango seed oil contains high solid, it can be developed into a product resembling spreadable margarine. The aim of this study was to determine the ratio of solvent, temperature, and time is optimum for extracting mango seed oil. Mango seed oil has been extracted by multistage extraction with hexane and ethanol. Extraction process was performed using reflux method at 30, 35, 40, 45, 50, 55, 60°C, for 1, 2, 3, 4, 5, 6 hours, with solvent ratio of 1: 2, 1: 3, 1: 4, 1: 5, 1: 6. The results showed that the ratio of solvent 1: 4, 50°C for 4 hours is the best condition for extracting mango seed oil by multistage extraction using n-hexane and ethanol.

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