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MEKTEK
Published by Universitas Tadulako
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Core Subject : Education,
Education
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Articles 8 Documents
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Search results for , issue "Vol 13, No 2 (2011)" : 8 Documents clear
IMPLEMENTASI ALGORITMA PRIM PADA JARINGAN DISTRIBUSI LISTRIK PRIMER DENGAN MENGGUNAKAN PROGRAM BERBASIS GIS Nugraha, Deny Wiria
MEKTEK Vol 13, No 2 (2011)
Publisher : MEKTEK

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Abstract

Optimization problem is the demanding problem for optimum solutions. The optimum (best) solution is asolution with minimum values, or maximum among a set of possible alternative solutions. In electricaldistribution network, problem of demanding achievement of optimum condition of system operationalperformance is essential. One of the factors necessary to consider in the designing of the primary electricaldistribution network is cost. Cost is closely related to length of cable used. It highlights the importance ofcalculating the minimum length of cable required in a network. The cable should be not only with as minimalas possible in length, but also regulated for better arrangement.Actually, in regulating the cable installation, longer path is more frequently selected. One of the ways ofachieving optimization condition is to use algorithm to determine a minimum spanning tree of the primaryelectrical distribution network system. In this study, the algorithm used is Prim’s algorithm.The research was conducted by designing a graph model of primary electrical distribution network inappropriate with the data obtained. Based on the graph, each was weighted for distance or length of networkcable by using the ArcView GIS 3.3. The data were then calculated and simulated by using computer to gaina minimum spanning tree of the primary electrical distribution network using the Prim’s algorithm
PENENTUAN ELEVASI PERMUKAAN AIR BERDASARKAN DATA SERIES TINGGI TEKANAN AIR Rusdin, Andi
MEKTEK Vol 13, No 2 (2011)
Publisher : MEKTEK

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Abstract

Series data of sea surface elevation is required to determine the parameters of tidal and wave parameters.The series data on sea water surface is irregular waves which are a superposition of several regular waves.Therefore, water surface parameters are usually based on statistical parameters. Statistical parameter ofwater surface can be obtained by performing frequency analysis on data series of water surface elevationobtained by field measurements. The water surface elevation can be also determined by converting dataseries of water pressure obtained by pressure sensors. In this paper, the water surface elevation that has asmall oscillation period is calculated based on two methods i.e. method of linear wave theory and methodTransform Fast Fourier (FFT). The water surface elevation that is calculated by using linear wave theorymethod is converted directly from data series of water pressure that consists of hydrostatic pressure anddynamic pressure. FFT method has two steps to convert water pressure to become water surface elevation.First of all data series of water pressure is fragmented into several regular waves based on their frequencies.Secondly, In order to reduce errors, water level fluctuations with high frequencies are removed from the databased on the maximum frequency that can be recorded by the measuring instrument. The maximumfrequency is determined by applying a deep-sea conditions and the depth position of the pressure sensor.Data used in the calculation is data from LIP11D experiments conducted at Delft LIP11D Hydraulic. Threedata sets of water pressure were used to compare the water surface elevation of direct measurements withtwo water pressure conversion results using linear wave theory and the FFT method. Results of analysisshow that the water surface elevation obtained by the FFT method gives good results when compared withthe results of direct measurements
PEMANCAR AM STEREO Amir, Ardi
MEKTEK Vol 13, No 2 (2011)
Publisher : MEKTEK

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Abstract

In this project created an AM STEREO transmitter that the signal can be received on receiving AM MONOand AM STEREO. To obtain broadcast quality, should be using the receiver AM STEREO. The advantages ofthis transmitter broadcasts a bit cleaner when compared with AM MONO, but the transmitter AM STEREOwas not hifi when compared with STEREO FM transmitter. Transmitter consists of four sections of the mostimportant are:-Isolator-Matrix Audio-Phase Modulator-Amplitude Modulator
PERENCANAAN PENGELOLAAN SAMPAH DI PERUMAHAN TAVANJUKA MAS Aswadi, Muhammad
MEKTEK Vol 13, No 2 (2011)
Publisher : MEKTEK

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Abstract

The purpose of this research is to know the solid waste volume which produced by society on Tavanjuka MasHousing and to determine the way to ménage solid waste. Collecting data in this research is done byinterview and direct measuring of solid waste volume on Tavanjuka Mas Housing. This research used 65numbers of samples to determine solid waste volume, then it are analyzed with simple linear regression usedMicrosoft Office Excel and geometric method to predict inhabitant sum. From the research result, theaverage solid waste volume produced by society on Tavanjuka Mas Housing1,3599 m3/day, which consist oforganic solid waste 0,920 m3/day and inorganic solid waste 0,4399 m3/day, with organic solid wastepercentage 67,72 % and inorganic solid waste percentage 32,28 %. Solid waste management on TavanjukaMas Housing can be done with sorting way, provision of place and then increasing of facilities like servicetransport of motor wagon with capacity 1 m3 as many 1 unit and the building of while place of exile withcapacity 1m3 for organic solid waste as many 2 units and inorganic solid waste as many 1 unit
ANALISIS PERPINDAHAN PANAS PADA GRATE COOLER INDUSTRI SEMEN Anwar, Khairil
MEKTEK Vol 13, No 2 (2011)
Publisher : MEKTEK

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Abstract

This research aimed to find out heat transfer rate between cooling air supply and clinker in grate cooler ofcement industry. The method used field survey with two datas. Primary data by direct measure in researchobject and others from control room. Then for the secondary data, we got from manual book of company.Grate cooler was divided into 3 sections, and the analysis performed for each section based on the principleof heat transfer through a porous medium to obtain the heat transfer coefficient, and the rate of heat transfer.Heat transfer of clinker to the cooling air was analyzed by convection and radiation. The result shows thatthe highest convection heat transfer occurs in section 2, while the highest radiation heat transfer occurs insection 1. Total heat transfer in the grate cooler is 95185.936 kW. This result will be smaller than thethermodynamic analysis, with calculation difference of 2%.
PERUBAHAN KARAKTERISTIK MEKANIS ASPAL YANG DITAMBAHKAN SULFUR SEBAGAI BAHAN TAMBAH Mashuri, Mashuri; Patunrangi, Jurair
MEKTEK Vol 13, No 2 (2011)
Publisher : MEKTEK

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Abstract

The purpose of this study is to observe the effect of sulfur on changes in mechanical properties of bitumenas a binder material. Usability research is expected to be preliminary information in estimating theadvantages and disadvantages of asphalt concrete when using material added sulfur.This research has been done in the Laboratory of Transportation and Highway, Faculty of EngineeringTadulako University, Palu.The scenario study was conducted with the manufacture of bitumen specimens with variation of sulfurcontent of 0.0%, 2.0%, 4.0%, 6.0%, 8.0% and 10.0% by weight of bitumen samples. Value mechanicalproperties of bitumen binder under study include the value of penetration, softening point, specific gravity ofbitumen, bitumen Flashpoint and Ductility. Method of inferential statistics (t-student test) at 5% significancelevel used to determine the effect of adding sulfur to the bitumen on the mechanical properties.The results of this study found that the addition of sulfur into the bitumen on the variation of 0% to 10%affect the mechanical properties of bitumen such as penetration, softening point, penetration index (PI), thespecific gravity of asphalt, asphalt ductility and Flashpoint. The study also found that the sulfur contentranges from 6% to 10% in bitumen tends to produce bitumen penetration index (PI) is positive (PI> 0) whichmeans the asphalt is less temperature susceptible.
PENGARUH KARBURASI DENGAN VARIASI MEDIA PENDINGIN TERHADAP MICRO STRUKTUR BAJA KARBON Zuchry, Muhammad
MEKTEK Vol 13, No 2 (2011)
Publisher : MEKTEK

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Abstract

Heat treatment is a process of heating and cooling of metals in the solid state to change the physicalproperties of the metal. In the metal that has undergone heat treatment process generally experience changesin the structure due to phase changes in metals in the form of grain size, crystal shape, crystal size, crystaldefects, presipitan and content of certain chemical elements. The presence of carbon steel microstructureperuahan to show a material characteristic that can determine its properties, microstructure can be known ifthe structure is viewed under a microscope metallurgy. The microstructure is known as: ferrite, ferlit,sementik (iron carbide) and austenite with certain variations depending on the level of heat treatmentexperienced
IMPLEMENTASI KEAMANAN E-MAIL DENGAN MENGGUNAKAN PGPTRAY Alamsyah, Alamsyah
MEKTEK Vol 13, No 2 (2011)
Publisher : MEKTEK

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Abstract

PGP is used to protect electronic mail or e-mail to provide privacy protection by encryption methods.Currently, PGP is not only intended for the security of e-mail but also for the safety of various files and dataon the Personal Computer (PC). Implementation of e-mail security using PGPtray provides convenience andsecurity in the dissemination of information or files and data transformation, and improve security in case ofa hack.. Besides using PGPtray applications where the files or data sent via e-mail in encrypted form so itcan not be read easily by people who do not have reader access files or data.Based on the results obtained that the system design in manufacturing PGPtray applications implementedwith the package installation stage flock, PGPtray installation, configuration PGP icon

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