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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 211 Documents
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Design Analysis of Driven Pile Foundations of Retaining Walls in Granular Soils Suradi, Muhammad; Nabi, Abdul; Hasanuddin, Haeril Abdi; Muktadiru, Andi Muhammad; Ridhatullah, Agung
INTEK: Jurnal Penelitian Vol 3 No 2 (2016): Oktober 2016
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (117.349 KB) | DOI: 10.31963/intek.v3i2.55

Abstract

The aim of this paper is to investigate the effect of the pile of retaining wall design parameters including slope height and soil shear strength on the depth of driven piles. Parametric study was performed by varying the slope height and internal friction angle of granular soils in order to investigate the effect of these parameters on the pile depth. This study indicated that the pile depth increased more significantly with the increase of slope height for low internal friction angle (7,69 m for ϕ = 20º) than those for high internal friction angle (3,87 m for ϕ = 40º) with the increase of slope height from 2 m to 10 m. Meanwhile this study showed larger increase of the pile depth (2.86 m) for the dcrease in internal friction angle when slope soils and subgrade have the same internal friction angle than those when they have different internal friction angle (1.41 m) for 6 m in the slope height with the decrease of internal friction angle of soils from ϕ = 40º to 20º.
Sintesis dan Karakterisasi Biokeramik Tulang sebagai Bahan Implant dengan Metode Sintering Syamsuddin, Syamsuddin
INTEK: Jurnal Penelitian Vol 4 No 2 (2017): Oktober 2017
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (397.85 KB) | DOI: 10.31963/intek.v4i2.147

Abstract

Abstract—An experimental study on the production of hydroxyapatite (HA = Ca10(PO4)6(OH)2) is conducted in this paper using sintering method. The experiment stars with cleaning process of bovine bone. The final products were characterized by X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR) and Atomic Absortion Spestroscopy (AAS). The obtained XRD spectra (HA synthesis) were compared to the JCPDS 09-0432 data andis and resulting a good enough result. It is also obtained that HA synthesis rasio Ca/P dengan AAS is 1.69.
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).
Effect of Recurrent Heating on Mechanical Properties of Artificial Teeth: A Review Asmeati, Asmeati; Nur, Rusdi
INTEK: Jurnal Penelitian Vol 5 No 2 (2018): Oktober 2018
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (259.805 KB) | DOI: 10.31963/intek.v5i2.572

Abstract

Nowadays lots of material is produced to increase there-mineralization of tooth enamel. The eggshells are one ofmaterials that can also increase the re-mineralization of toothenamel. Eggshells are one of calcium carbonate sources with levelsof 95%. The egg produces waste in the form of eggshells. One ofthe alternatives in tackling the eggshells is to turn it into a calciumcompound. It is the main ingredient of bones and enamel tooth.This paper is proposed to investigate the effect of recurrent heatingon mechanical properties of artificial teeth. This review wasdescribed some study experimental that was performed to heat thespecimen with 20oC, 40oC, 100oC, and 120oC. The heating result ofspecimen was observed to determine the hardness using Brinneland Vickers scale. It was concluded that the higher of heatingtemperature will decrease the hardness of denture base acrylic.
Desain dan Pembuatan Cetakan Sistem Injeksi untuk Cetakan Plastik Adonan Donat Hadi, Syamsul; Murti, Tandya Nanda Haswari; Sayekti, Saifudin Kalih; Setiawan, Agus
INTEK: Jurnal Penelitian Vol 3 No 2 (2016): Oktober 2016
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (471.366 KB) | DOI: 10.31963/intek.v3i2.62

Abstract

The problem lies in the length of process, it is hard tomake, and a donut shape (circle-shaped cake and hollow in the middle) are not good made by the domestic industry that created manually (by hand). The purpose of the design and manufacture of plastic mold injection molding system for donuts is to speed up the processing of dough donut with easy and efficient way. Methods of design and manufacture of plastic molding dough donut capacity of 30 product/hour with injection system include: survey for dimensions of donuts on the market, determining the thermal expansion of the dough after frying for the determination of shrinkage in the dimensions of the mold, mold design on the top and bottom, the design of cooling systems, the design for ejection system for mold products, working drawings, machining components, assembly, testing, and the calculation of production costs. The results of the design and manufacture of plastic molding dough donut is a donut molds for parts of the top and bottom made of plastic material types of polypropylene (PP).
Prototipe Pengendali Pintu Darurat Menggunakan Mikrokontroler ATMega 16 Zain, Abdul; Muliawan, Arief
INTEK: Jurnal Penelitian Vol 5 No 2 (2018): Oktober 2018
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (669.496 KB) | DOI: 10.31963/intek.v5i2.583

Abstract

In a building should have a good security system,especially Emergency Exit (emergency evacuation path).Emergency Exit is important because when an emergency occursin the building, the first thing to do is get out of the lab building.One thing to note is the emergency exit door. With the emergencydoor that can be opened quickly so all workers can get outquickly as well from the building when an emergency occurs.So,we need a model (prototype) controlling an emergency door thatcan function properly in an emergency. Prototype newemergency door controller is expected to be implemented intoactual emergency door. Prototype can be accessed with a pushbutton by the user facility. The prototype controller usemicrocontroller ATMega16. And for each emergency exitmovement is monitored and its status is expressed in LEDindicator lights and LCD display on 16x2. Modeling controllingemergency exit of a series of tests using a prototype have workedwell except on the 3rd test caused an error when calibrating thedistance between Ultrasonic sensor with Emergency Door.
Analisa Pengaruh Penyerapan Air Sungai Mahakam terhadap Kekuatan Tarik Material Komposit dengan Variasi Perbandingan Matriks dan Hardener Zulkifli, Zulkifli; Hermansyah, Hadi
INTEK: Jurnal Penelitian Vol 3 No 1 (2016): April 2016
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (121.238 KB) | DOI: 10.31963/intek.v3i1.23

Abstract

Penelitian ini bertujuan untuk menganalisa pengaruh perendaman selama 9 hari terhadap kekuatan tarik material komposit resin epoksi tanpa penguat serat dengan perbandingan 65:35, 70:30, 75:25; dan mensimulasikan laju penyerapan air selama 9 hari pada material komposit resin epoksi tanpa penguat serat dengan perbandingan 65:35, 70:30, 75:25.Polimer yang digunakan jenis resin epoksi, selanjutnya dicetak dengan ukuran 200 x 200x 4 mm dengan perbandingan antara resin dan hardener yaitu 65:35, 70:30, dan 75:25. Lalu pelat komposit direndam dalam wadah akuarium yang berisi air dari sungai Mahakam selama 9 hari, prosedur pengujian penyerapan Air sungai ini mengacu pada ASTM D 570 – 98. Setelah 9 hari pelat dipotong membentuk balok komposit polimer sesuai standar ASTM D638-02 (type 1). Setiap variabelakan diuji sebanyak 3 kali. Berdasarkan pengujian perendaman yang dilakukan pada spesimen 65:35 massanya bertambah 0.4135 %, specimen 70:30 bertambah 0.2677 %, dan spesimen 75:25 bertambah 0.4 %, sedangkan hasil uji tegangan tarik spesimen 65:35 sebelum direndam sebesar 32.333 MPa setelah direndam turun menjadi 24.46 MPa, tegangan tarik spesimen 70:30 sebelum direndam sebesar 36.3 MPa setelah direndam turun menjadi 34.793 MPa, tegangan tarik spesimen 75:25 sebelum direndam sebesar 32.993 MPa setelah direndam turun menjadi 25.803 MPa.
Studi Kecepatan Aliran Air dengan Menggunakan Tabung Pitot Iqbal, Muhammad Taufik; Faisal, Zulvyah
INTEK: Jurnal Penelitian Vol 5 No 1 (2018): April 2018
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1071.825 KB) | DOI: 10.31963/intek.v5i1.194

Abstract

The tools and methods used in the measurement of water flow velocity are now very diverse, such as by using Venturi Meter, Orifice, Current Meter, Pitot Tube, and so forth. To learn more about water flow velocity measurement method, in order to improve professionalism in the field of water resources can be done research at Hydraulics Laboratory by researching Water Flow Analysis by Using Pitot Tubes. The research process will be carried out using three varied channel basis samples: reviewing the velocity of the water flow at the bottom of the channel with slippery base, reviewing the flow rate of the water on the gravel base channel, and reviewing the flow rate of the water on the channel with the decking concrete base. The expected result of this research is knowing the distribution of velocity in a cross section such as drainage channel, irrigation channel and river, so construction of water structure can be adjusted position placement in the open channel section. In addition it can be used as a reference in planning an open channel. One of the benefits to construction cofferdam construction speed distribution is to determine the dewatering system to be carried out during construction.Keywords— Flow Speed, Speed Distribution. Channel Basic Variations
Penerapan Teori Graf pada Topologi Matriks Jaringan Distribusi Radial dalam Menentukan Losses Adnan, Muhammad; Abidin, Zainan
INTEK: Jurnal Penelitian Vol 3 No 1 (2016): April 2016
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (272.988 KB) | DOI: 10.31963/intek.v3i1.5

Abstract

Losses in distribution network of electrical power system with radial system topology can be calculated using Graf Theory. Graf Theory uses nodes and branches that are exist in radial network and convert them in matrices equations. This method is used to determine injection current in losses calculation in every single network branch.
Rancang Bangun Kursi Penderita Cereblal Palsy Arsyad, Muhammad; Anzarih, A.M.
INTEK: Jurnal Penelitian Vol 4 No 2 (2017): Oktober 2017
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (462.511 KB) | DOI: 10.31963/intek.v4i2.151

Abstract

The general goal of this research is to help provide a means to train the muscles of the sufferers Cerebral Palsy (CP). In especially, the objectives are: (1) Make a seat that has a function like easy stand, (2) Provide easy stand chair at a price affordable by people suffering from CP. Problems to be solved through applied product research activities are (1) how to make a chair that has functions such as easy stand, (2) how to provide easy chair seat with low price that can be reached by CP sufferer. To achieve these goals be done designing and making a chair similar to chair easy stand for people with CP. Stages of activities include designing, manufacturing components, assembling, testing and repair. Based on the test results, it is concluded that the celebral palsi chairs function well, including the components such as knee retention, peut holder, and table. The price of one CP chair is Rp 10 million.

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