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MEKTEK
Published by Universitas Tadulako
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Core Subject : Education,
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Articles 145 Documents
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KARAKTERISTIK MEKANIK KAYU KAMPER SEBAGAI BAHAN KONSTRUKSI Chauf, Kusnindar A.
MEKTEK Vol 7, No 1 (2005)
Publisher : MEKTEK

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Abstract

Mechanic characteristic is needed for efficiency and optimalization of wood as structural member, so that it can be placed in order of construction. By conducting mechanics test refered to ISO 1975, it could be examined a mechanics characteristics of wood as a base of structural aplication. In this case the flexure strength capacity (MOR) is 89.989 MPa and flexure elasticity (MOE) is 13260 MPa. Parallel tension strength (s//), parallel compression strength (stk//), and shear strength (t//) are 126.913 MPa, 0.4s// and 10,913 MPa respectively. The type of collapse is elastic linier; the brittle collapse will be happened in tension on the otherhand elastics and non linier collapse will be happened in flexure, compression as well as shear. Average mechanic intencity of Kamper will increase if the water content is decrease and the highest increasing on the parallel compression capacity, i.e. 50,5% if it is compared to dried and green condition
NAIKNYA BIAYA REKENING LISTRIK UNIVERSITAS TADULAKO TAHUN 2012 Mukhlis, Baso
MEKTEK Vol 14, No 3 (2012)
Publisher : MEKTEK

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Abstract

The amount of electricity bill payment of Universitas Tadulako in recent months has increased to between Rp. 240.000.000,- and Rp. 260.000.000,- per month. This bill payment increases three times compared by the average of electricity bill payment in period 2009 - 2010.  Based on the monitoring and measurement results of the electricity  load in surrounding  Universitas Tadulako, it is found that the increasing of the electricity bill payment is caused by the unbalancing of the load consumption pattern such that resulting in lots of losses, so many electricity consumption in out of the work hours and there is a substation that uses the government group electricity rates which should use social group electricity rates.
PENGATURAN KECEPATAN PUTARAN MOTOR DC BERBASIS KOMPUTER Anshori, Yusuf
MEKTEK Vol 11, No 2 (2009)
Publisher : MEKTEK

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Abstract

The development of industrial world needs an instrumentation automation that to support production process. For a true intelligent and flexible automated manufacturing system, the system should be able to respond to changing conditions by changing the manufacturing process all by itself. Computers can be programmed to "read" external conditions and to execute different parts of their programs depending on the sensed conditions. Computers will require additional interface cards like PPI 8255 and programming like Delphi. Various excess and amenity high level programming language base on GUI (Graphical User Interface) and running at Windows Operating System like Delphi make a produce application more quicker and efficient. DC motor which is ordinary to be used as automation actuator can be controling movement by computer
EFEK UDARA DI DALAM SISTEM REFRIGERASI Patabang, Daud
MEKTEK Vol 7, No 2 (2005)
Publisher : MEKTEK

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Abstract

The performance of refrigeration system are affected by  condenser, evaporator ,compressor and regulating  valve. Besides   cooling system itself   air in the system are also considered to the performance. The aim of this research to investigate the effect of air in the refrigeration system that  cause the performance of system. The result of this research indicates that coefficient of performance (COP)decrease falls to 37 % (from 8.4 to 5.28) due to the air in refrigerations system, on the contrary  there  is increasing about 40 % (from 25 kJ/kg to 35 kJ/kg)of energy in gernerating compressor
PENGARUH PENGGUNAAN KAPUR PADAM SEBAGAI BAHAN PENGISI (FILLER) PADA KETAHANAN PENGELUPASAN BETON ASPAL LAPIS AUS (AC-WC) Mashuri, Mashuri; Batti, Joy Fredi; Listiana, Listiana
MEKTEK Vol 15, No 2 (2013)
Publisher : MEKTEK

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Abstract

Asphalt Concrete Wearing Course (AC-WC) Pavement is located at the upper layer indirect contact with the vehicle wheel, rain and sunshine. This condition causes the pavement layer AC-WC susceptible to damagecaused by traffic loads, the influence of water and the hot sun as stripping. Currently, much effort has beendone such as the use of hydrates lime as an additive to improve the durability of the AC-WC pavement from damage. However, this study tries to use hydrates lime as a filler material in view of its influence onstripping resistance of AC-WC pavement. The purpose of this study was to determine the effect of the use of hydrates lime as a filler material to stripping resistance of AC-WC pavement. The test have been done on each percentage of hydrat lime: 0%, 25%, and 50%. Testing of AC-WC pavementto stripping  resistance using Immersion Compression Test to obtain the Index of Residual Strength (IRS)AC-WC pavement. Value of the residual strength index is an indicator of stripping resistanceof asphalt pavement. Testing of Immersion Compression Test using a Universal Testing Machine (UTM) atthe test temperature is 250C. Testing of Immersion Compression Test conducted for each percentage ofhydrate lime on the condition of Optimum Asphalt Content. The results of the study found that the use ofhydrat lime as a filler material can affect the stripping resistance of AC-WC pavement. This is indicated bythe increased value of the IRS pavement using hydrates lime as a filler material than without the use ofhydrate lime. The study also found that the IRS maximum value is 96.03% in the hydrat lime content of 25% and aminimum value of 94.48% IRS on the hydrate lime content of 50%.Keywords: Stripping resistance, hydrate lime, IRS
STUDI BEBAN TIDAK SEIMBANG TERHADAP ARUS NETRAL PADA TRANSFORMATOR DISTRIBUSI P70 PADA PLN CABANG PALU Pirade, Yulius Salu
MEKTEK Vol 11, No 3 (2009)
Publisher : MEKTEK

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Abstract

STUDI BEBAN TIDAK SEIMBANG TERHADAP ARUS NETRAL PADA TRANSFORMATOR DISTRIBUSI P70 PADA PLN CABANG PALU
KARAKTERISASI KAOLIN KAB.BARRU SEBAGAI BAHAN DASAR KERAMIK Hamzah, Muhammad Sadat
MEKTEK Vol 7, No 2 (2005)
Publisher : MEKTEK

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Abstract

Study conducted by represent the study of early storeylevel of ability of exploiting or kaolin potency of an area which is later;then acted  . in this penelitiaan on the market idea to exploit the existing resource the core important regional industrial dig materials of sulawesi south . Ceramic in this time experience of the fast progress where materials of the core important kaolin but to know the ability which is consisted in  it hence there is its character standard . hence in this examination combine the conventional analysis and carakterisasi to kaolin materials done by perception with the instrument of like X-RD, SEM / EDAX And DTA. This test is conducted for to prove the compiler rate . structure. and ability and ability which is consisted in in its material is then clarified by optimalisasi of according to obtained result value
PENGARUH BAHAN TAMBAH PLASTIMENT-VZ TERHADAP SIFAT BETON Maricar, Shyama; Tatong, Burhan; Hasan, Hajatni
MEKTEK Vol 15, No 1 (2013)
Publisher : MEKTEK

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Abstract

Concrete mixture for structure of the building is expected to according to the quality and specifications desired. With the addition of admixtures materials used for concrete mix, it is necessary to know the type, properties and benefits of admixture produced by various companies. Concrete used In this study were added admixtureof Plastiment-VZ for characters investigated.In this study used two variations of concrete, ie normal concrete and concrete with the addition PlastimentVZ with usage percentage of 0.20%, 0.40% and 0.60% of the weight of the cement used in normal concrete. Cylindrical specimens used for compressive strength testing with a total of 3 pieces for each test.The test results obtained average compressive strength of normal concrete (f'cr) of 27.554 MPa, and for concrete with the addition of-VZ Plastiment of 0.20% obtained an average compressive strength, f'cr = 29.252 MPa, the concrete with the addition of Plastiment-VZ 0.40%, obtained f'cr = 30.951 MPa, whereas the addition of 0.60% for the compressive strength at 28 days obtained at 32.083 MPa.Keywords: Compressive strength, Plastiment-VZ
PEMODELAN NUMERIK ALIRAN FLUIDA PADA TIANG SILINDER DENGAN METODE BEDA HINGGA Anasiru, Triyanti; Setiyawan, Setiyawan
MEKTEK Vol 12, No 1 (2010)
Publisher : MEKTEK

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Abstract

Fluid flow in nature represent stream three dimension. For example, coordinate of Cartesian of streamrepresent variable of component instruct X, Y and Z. Equation of the Stream developed from ConservationLaws Of Mass and Punish Newton II, later recognized with equation of continuity and equation of motionmean of Navier Stokes.This Writing aim to to get model of numeric for case of simple fluid flow and the fluid flow which through ofpillar cylinder by using method different till. And also make analysis to result resolving of the problems.In test model program made to be conducted by using uniform stream for the ideal fluid by discrete 152 X 52Grid. This model tried to be made ideal fluid (unviscous, incompressible and unsteady). This model intendedto can see stability use of different model till in resolving of case of hydrodynamics and fluid dynamicsAnalyze performed within this writing for example every price early to model fluid case of uniform stream byusing program of Matlab 7.1 giving different result for the same case depend on initially condition. Fromresult analyze the way of handling of boundary condition very influence result of calculation. In general thecorrectness mount if order correctness of different operator till used mount
ANALISIS TEORITIS DAN EKSPERIMENTAL LENDUTAN BATANG PADA BALOK SEGIEMPAT DENGAN VARIASI TUMPUAN Mustopa, Mustopa; Naharuddin, Naharuddin
MEKTEK Vol 7, No 3 (2005)
Publisher : MEKTEK

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Abstract

The aim of this researh is to analyze about deflection which is theoretically or experimentally happened to block square by using various foothold. Integration method and of the bending moment diagram method are used in this researh. There are some factors which effect the action of deflection such as kind and big load, given-force, strength of materials, and kind of foothold

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