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Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Core Subject : Engineering,
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Articles 3,145 Documents
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Optimasi Pembagian Beban Pada Sektor Pembangkitan Pekanbaru PLTD/G Teluk Lembu Pada BUS 20 KV Dengan Metode Newton Arbi Wahyu; Firdaus Firdaus; Nurhalim Nurhalim
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The electricity demand always increases and electricity consumption too changes every time. The cost of power generation also changes when the electric load changes. planning is required to determine the portion of the generation of each plant in order to obtain an economical generation. In this study, solving solution using Newton's method aided with software Microsoft Office Excel and Matlab 2008b. The results of the testing that has been done, that PLTMG Haleyora operates at 08.00 am at 14.484 MW, while the maximum operating diesel from 10.00 am to 24.00 pm for 7 MW. while the peak load period all plants operate optimallyKeywords: Optimization, Load, Generation, Method Newton
Analisa Quality Of Service (QoS) Jaringan Internet Berbasis High Speed Downlink Packet Acces ( HSDPA) Pada PT. Telkomsel Juhardi, Juhardi; Yasri, Indra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

High Speed Downlink Packet Accees (HSDPA) is the latest technology in mobile telecommunication system issued by 3GPP Release 5 and 3,5 generation technology (3,5G). Based on the importance of HSDPA internet quality network on Telkomsel, so it is necessary to measure the level of service network. Through this research , the writer did an “Analysis of QoS internet network based HSDPA in PT. Teklomsel”. The analysis focused on the parameter like throughput, packet lost, and delay. To get quality of service based on those parameter, so the writer choose a few areas that in considered representative in Pekanbaru. Those areas are, Campus Area, Office, Human Settlement, and Riau Main Stadium. After the measurement and analysis by using software Axence NetTools, it obtained the most optimal result as follows: Campus Area (throughput 0.91%, packet lost 20% and delay 143.9ms), office area (throughput 0.91%, packet lost 20%, delay 273ms), human settlement area (throughput 0.68%, packet lost 5%, and delay 339.8ms), outdoor area (throughput 0.65%, packet lost 9%, and delay 345.6ms). Based on the results of measurement and analysis, it can be concluded that the promotion and specification of network quality in Telkomsel has not met the expectations of consumers. It refers to the measurement and analysis based on THIPON standard.Keywords: HSDPA, Throughput, Packet Lost, Delay, Axence NetTools.
Kajian Potensi Ketersedian Air Menggunakan Model Neraca Air Bulanan Thornthwaite-Mather (Studi Kasus : Sub Das Subayang Kampar Kiri Hulu Cuprtino Tamba; Manyuk Fauzi; Imam Suprayogi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Abstract

Water quantity is an important factor in evaluating water resources. It must be measured directly, However not all of the watersheds has hydrology station, the quantity or the amount of the water can be measured by modeling. One of the simple models in estimating the potential of water each month is Thornthwaite-mather method. This method is based on water balance. The rain as an interior, the evapotranspiration and the discharge of water as superficial. The characteristics of the soil physically and the occlusionof land area as a processor. The aim of this research is to getan information about the appraising of the availability of the water per month. The result of this research shows that the appraising of the potential of the availability of water assumed that 50% of the surplus of the water will be become runoff. The Runoff computation of the surface will be start as soon as the dry season ending. (S>0)in which at this point, assumption 50% is used from the surplus that will be added to the run-off for the upcoming month in and the Runoffis the amount of the availability of the water in the sub watersheds Subayang of the water in the sub watersheds Subayang.In order to get the good result of the standard comparison.The result of the water measurement is better to be checked again.Keywords: Water potensial estimation, Direct mesurement
Pemanfaatan Serabut Gambas (Luffa Cylindrica) Sebagai Template Untuk Pembuatan Scaffold Hidroksiapatit Lubis, Apriadi; Fadli, Ahmad; Bahruddin, Bahruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Utilization of hydroxyapatite (HA) as a bone implant could be done by making the HA in the form of a scaffold to obtain good porosity and good mechanical strength. The purpose of this research is to determine the influence of solid loading HA toward characters of scaffold HA fabricated by polymeric sponge method. Gambas sponges were cut into circular samples of 1 cm diameter and then soaked with distilled water for 12 hours and then dried in the open air for 1 hour. Gambas sponges were then impregnated with a slurry made by mixing 10; 11; and 12 grams of HA, 10% sago, 3% Darvan 821A and 12 grams of distilled water. The mixture were stirred for 20 hours to form a slurry. The substrates were impregnated and then dried at 110oC for 3 hours. The resulting green bodies then burned at 600oC for 1 hour and followed by sintering at 1250oC for 1 hour. The results showed that the addition of HA lead to smaller shrinkage and porosity. In addition of HA, the resulting shrinkage in the range of 57,71-59,46%, porosity 52,30-56,37%, and compressive strength 5,14-7,88 MPa.Keywords: hydroxyapatite, luffa cylindrica, polymeric sponge, scaffold
Aplikasi Shrinking Core Model Pada Sintesis Hidroksiapatit Menggunakan Metode Hidrotermal Suhu Rendah Nuraina Siregar; Ahmad Fadli; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Abstract

Hydroxyapatite (HA) is a ceramic material can be used as bone and dental implants. Hydroxyapatite can be synthesized from calcium oxide (CaO). The purpose of this study was to determine the effect of reaction time and stirring rate on the characteristics of HA using a low temperature hydrothermal method and determine the kinetics model with the approach of shrinking core models. There are 3 models that are used; diffusion through the film layers, diffusion through the layer result (HA), and chemical reactions. The first procedure was weighing 36.9 of grams NH4H2PO4 and dissolved in 600 ml of aquadest are then added 30 of grams CaO at a temperature of 90 °C and reaction time with variation 5, 30, 60, 90, and 150 minutes. The mixture was stirred rate of 100, 200, 300 rpm until paste formed. The paste was dried in an oven at a temperature of 110oC for 15 hours and calcined at a temperature of 900oC for 1 hour. XRD diffraction results shows HA with pure content of 95% and SEM result shows morphology of HA was like agglomerate. The best kinetics model showed synthesis of HA is model 2 with equation:It was named “Diffusion Through the Layer Results (HA)” with the smallest percentage error of 4,3%.Keywords: CaO, hydroxyapatite, hydrothermal, model kinetics, shrinking core
Kajian Optimalisasi Lahan Pertanian Pada Daerah Irigasi Sungai Paku Kecamatan Kampar Kiri Kabupaten Kampar Karnanda, Eka Jevri; Mudjiatko, Mudjiatko; Siswanto, Siswanto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Abstract

Changing at land used in Sei Paku Irrigation area caused the change of potential land from ± 1132 hectares to ± 373 hectares . This resulted in the failure of the rice granary program by the Riau provincial government., Resulting in declining agricultural productivity and incomeof the farmer community. Simulations done using linear programming optimization model with the help of SolverLinear Programming to get the value of the biggest advantages of multiple cropping patterns are applied.Thecropping pattern which gave benefit for the optimization is the 8th alternative ( Palawija/Fishpond -Palawija/Fishpond - Palawija/Fishpond). Replenishing water started at2ndperiod of December, in the area for crop season I: 0 hectares for Palawija and 493.09 hectares for Fishpond. Crop season II:0 hectares for Palawija and 314.74 hectares for Fishpond. Crop season III:0 hectares for Palawija and 542.90 hectares for Fishpond with benefit every year wasRp 25,659,599,866.55. However, the cropping pattern was not in accordance with thecropping patternplanned for agriculture. Therefore, the researcher chose the 1st whizh was Rice - Rice - Rice The pattern with planting started at 2nd period of February, inthe area for 1stplanting season was 457.41 hectares, 2ndplanting season was 325.05 hectares, 3rd planting season was 680, 01 Ha. The total of benefit gained every year was IDR 22,814,536,868.18.Keywords: Cropping pattern, optimize, linear Program
Aplikasi Shrinking Core Model Pada Sintesis Hidroksiapatit Dari Kulit Kerang Darah (Anadara Granosa) Dengan Menggunakan Metode Hidrotermal Suhu Rendah Ervina Ervina; Ahmad Fadli; Idral Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Abstract

Hydroxyapatite (HA) is a ceramic material that can be used as bone and dental implants. Hydroxyapatite can be synthesized from the cockle shell (Anadara granosa). The purpose of this study was to determine the effect of time and stirring rate on the characteristics of HA using a low temperature hydrothermal method as well as decide of the kinetics model with the approach of shrinking core models. There are 3 models that are used, namely diffusion through the liquid film control, diffusion through the layer results (HA) control, and chemical reaction control. Research procedures initiated by the reaction of 36.9 g NH4H2PO4 dissolved in 600 mL of water were then added as much as 39.37 g CaO at stirring rate of 100 rpm, 200 rpm, 300 rpm and reaction time of 5 minutes to 150 minutes. The mixture was reacted at a temperature of 90˚C to form a paste. The paste was dried in an oven at 120˚C for 12 hours and calcined at a temperature of 900˚C for 1 hour. The results showed that the product formed is 95% fraction massa of HA. Kinetics model that describes the events of the synthesis of HA for belong to model 2, i.e diffusion through the layer results (HA) control with the smallest error percentage of 16.15 % with the formula:Keywords: cockle shell, hydrothermal, hydroxiapatite, kinetics model, shrinking core model
Perencanaan Dan Simulasi Jaringan LTE ( Long Term Evolution ) Di kota Pekanbaru Firmawan, Andes; Sari, Linna Oktaviana
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Abstract

The development of information and communication technologies growing more rapidly, as well as wireless communications technology. At the same time, theneed for information is also greater with the higher mobility. Technology Long Term Evolution (LTE) is believed to be able to answer that question.LTE is a technology developed by 3GPP as the development of mobile communication technology before. In theory LTE in this thesis is to make an LTE network simulation based methods duplex Frequency Division Duplex (FDD) with a frequency of 1800 MHz in the city of Pekanbaru using software Atoll. In this paper used the method of planning coverage to support the model propagated COST-231 hata are in use by means of simulation.The simulation results show Pekanbaru require at least 99 LTE site that is covered Ratio Signal (RS) and Carrier to Interference Noise Ratio (CINR) of at least 97%. The results of the simulation throughput, customers who successfully connected to the network at abandwidth of 5 MHz amounted to 82.7% and to a frequency of 10 MHz by 86.4%, while for a frequency of 15 MHz at 86.4%, and to a frequency of 20 MHz by 66%.Keywords: LTE, Atoll, Bandwidth, Coverage
Analisis Laju Infiltrasi Pada Tutupan Lahan Perkebunan Dan Hutan Tanam Industri (HTI) Di Daerah Aliran Sungai (DAS) Siak David, Muhammad; Fauzi, Manyuk; Sandhyavitri, Ari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Abstract

The change in land use may affect the availability of ground due the change of infiltration in to the soil. One of the significant factors that can increase infiltration rate is vegetation coverage. The purpose of this study is: (1) to determine the infiltration rate of 4 type of vegetation land cover and (2) to determine the land cover classification based on the average value of the infiltration capacity. The research was conducted in 4 different land cover : immature palm oil plantation, mature palm oil plantation, rubber plantation and acacia Industrial plantation forest. Infiltration test for each land cover was processed at 8 points on 4 soil types and the obtained data was processed using Horton infiltration method. Based on analysis resulting using Horton infiltration method, immature palm oil plantation with 0,54 cm/hour of infiltration capacity is classified as group B (medium surface flow), oil palm plantation with 0,18 cm/hour of infiltration capacity as group C (between high and medium surface flow), rubber plantation with 0,92 cm/hour of infiltration capacity as group A (low surface flow), and acacia plantation area with 0,91 cm/hour of infiltration capacity as group A (low surface flow). Based on the regression result between the actual infiltration rate and Horton infiltration acquired a very real relation, so that Horton infiltration method can be used to estimate infiltration rate of four types of land cover in Siak Watershed.Key words: Change in land use, Double ring infiltrometer, Horton infiltration method, Infiltration rate.
Analisa Kinerja Jaringan Provider Untuk Aplikasi Video Chatting (Studi Kasus Di Daerah Marpoyan) Jeri Dwi Danur; Febrizal Febrizal
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Abstract

Video chat is a communication that allows users to chat and can see the other person's face directly. Video chatting requires a good network to transmit audio and video data in a short time. This paper examines the performance of three mobile network provider (Provider A and Provider B Provider C) in a video chat in the area Marpoyan and the effect of time when doing video chat on the performance of each provider. The method used is the method using packet sniffing software wireshark to see Quality of Service (QoS) generated by each provider. QoS parameters analyzed such as delay, jitter, packet loss and throughput. Analysis results of data from experiments conducted showed that the best time to do video chat for three provider is at early morning (at 00:00 to 06:00), while the worst time to do video chat on Provider A and Provider B at daytime (12:00 to 18:00) and Provider C at night time (18:00 to 00:00).Keyword: Video chatting, QoS, Packet sniffing

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