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INDONESIA
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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Pemodelan dan Simulasi Protokol Routing DSR pada Jaringan Vehicular Ad hoc Network (VANET) Di Pekanbaru Azmi, Agusurio; Sari, Linna Oktaviana
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Pekanbaru city is a large area, therefore traffic congestion often occurs due to the density of society’s vehicles. From this problem, it is needed a technology that can exchange information between vehicles. Information Technology that can involve many vehicles with special network types without dependence on an infrastructure is Ad Hoc Network. One type of this network is Vehicular Ad Hoc Network (VANET). VANET is a new concept in enabling communication between Vehicle to Vehicle (V2V). For efficient data packet delivery, VANET requires a routing protocol. In this research, for simulated and analyzed performance is used the Dynamic Source Routing (DSR) protocol. NS-2 is used to simulated a moved nodes, SUMO software is used to simulated real map of SKA Mall crossroad and parameter the quality of performance routing protocol DSR can determined by Packet Delivery Ratio (PDR). This simulation uses scenario 100 nodes, 150 nodes, 200 nodes and 250 nodes. The result shows that the VANET designed can work well with average of the PDR is 99.61%.Keywords : VANET, DSR, Routing Protocol
Analisis Perbandingan Kinerja Protokol Routing Proactive Dan Reactive Pada Vehicular Ad Hoc Network (VANET) Di Kota Pekanbaru Ahmad Romadan; Linna Oktaviana Sari; Ery Safrianti
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Communication between vehicles plays an important role in increasing comfort such as reducing vehicle density and security, namely regulating vehicle speed for drivers and passengers. Advances in technology offer concepts to improve comfort and safety in driving, namely Vehicular Ad Hoc Network (VANET). However, VANET has network characteristics where the network nodes are moving very fast. In this research, a comparison of the performance of two topology-based routing protocols is performed. The topology in this research are : Optimized Link State Routing (OLSR) and Dynamic source routing (DSR) on VANET. (OLSR) is a proactive routing protocol that determines the routing table by updating every time a link changes, (DSR) belongs to a reactive routing protocol that only selects paths or updates paths only when there are new route or when a route is cut off. Both routing protocols are simulated using Network Simulator 2 (NS-2) with a scenario of changing the number of nodes. The two protocols are compared based on the parameters of the Packet delivery ratio and end-to-end delay. From the results of the study it was found that the DSR routing protocol has a better PDR value of 99.80% compared to OLSR of 99.53%, the average end-to-end delay from DSR is 0.13 seconds, while OLSR is 0.12 seconds. This shows that the DSR routing protocol is superior to the packet delivery ratio and OLSR routing protocol excels at end-to-end delay Keyword: VANET, Proactive, Reactive, OLSR, DSR
Karakteristik Mekanis Dari Campuran Abu Terbang Dan Abu Dasar Dalam Geoteknik Ridwan Hamdani; Muhardi Muhardi; Syawal Satibi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Generally, coal are used for fuel by industry factory at Indonesia. Coal burning produce two of kind waste, that is fly ash and bottom ash. Utilization of coal waste is not optimal yet at this time. This research aims to find out optimum percentage from fly ash and bottom ash mixed by mechanical strength and to know curing effect for 0 and 28 days. The result of proctor standard is increasing proportion bottom ash content on fly ash and bottom ash mixed, then increased dry density maximum while optimum moisture content is decreased. CBR value is increased with increasing bottom ash content. From UCS test, value shear strength (cu) is decreased because increasing bottom ash content. Value from CBR, UCS and Triaxial test is increased after curing for 28 days.Keywords: coal, fly ash, bottom ash, mixed, mechanic characteristic
Keruntuhan Progresif Gedung Beraturan Sistem Ganda Fazrian, Dhika; Djauhari, Zulfikar; Ridwan, Ridwan
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This research aimed to examine the progressive collapse of dual system building structures due to the loss of one or more structural elements that lead to successive collapse of other elements. Three cases of building structures were analysed in this study using finite element software. Several columns on the first floor of the structure was removed and then the analysis was conducted to each structure until the progressive collapse existed. The nonlinear statics analysis was used to examine the location of the critical column while the linear statics analysis was carried out to find the demand capacity ratio, the bending moment ratio and robustness indicator as suggested by GSA 2003 and SNI 2847-2013. The results showed that the structure denoted in case 1 and case 2 that was loaded comply with GSA 2003 experienced the progressive collapse. On the other hand this phenomenon did not appear on the structure that was loaded in accordance with SNI 2847-2013. Furthermore, there was an increase in the bending moment capacity of the column/beam on all cases that were loaded comply with SNI 2847-2013 and GSA 2003. Robustness indicator is almost equal one with the type of progressive collapse is pancake collapse type.Keywords : Progressive Collapse, Demand Capcaity Ratio, Bending Moment Ratio And Robustness Indicator.
Pembuatan Biodiesel Dari Minyak Jarak Pagar Dengan Katalis La/NZA Irnaliah, Irnaliah; Bahri, Syaiful; Khairat, Khairat
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Biodiesel is an alternative energy to replace fossil fuels. It can be made by transesterification process of vegetable oils such as jatropha oil. During the process of making biodiesel it using homogeneous catalyst such as NaOH or KOH. But homogeneous catalyst has disadvantages the formation of side product and complexity the separation of catalyst. Therefore, in this study the use of heterogeneous catalyst La/NZA was developed to produced biodiesel. The purpose of this research were produce biodiesel from jatropha oil, study the effect of mole ratio of oil/methanol and concentration of catalyst on yield of biodiesel, determine the best conditions for biodiesel production and to identify the characteristics of biodiesel produced.In the transesterification process, concentration of catalyst and mole ratio oil/methanol was variated. Yield of biodiesel based on product methyl ester and selectivity is calculated.Keyword: biodiesel, esterification, heterogeneous, transesterification
Porositas Beton Blended Abu Terbang (Fly Ash) Sebagai Substitusi Semen Di Air Gambut Mardiah, Ramona; Kamaldi, Alfian; Olivia, Monita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

One of the environmental conditions that can affect the quality of concrete is peat water. In this study an alternative was carried out to improve the durability of concrete in peat environments using pozzolanic material, one of them is fly ash. Fly ash has pozzolanic properties with fine particle size and can react with lime and water so as to produce material that has binding ability. This research studied the porosity of Ordinary Portland Cement (OPC) containing 25% of fly ash immersed in peat water. Fly ash was used as a cement substitutive. The cylinder concrete strength of the specimen at 28 days were 15, 21 and 29 MPa. The specimens were cured first in fresh water for 28 days and then they were immersed in peat water for 7 and 28 days. The porosity of OPC-FA-15, OPC-FA-21, and OPC-FA-29 immersed in peat water for 28 days were 16.10%, 12.16%, and 11.62% lower than that of immersed in fresh water. Moreover, higher concrete quality would result lower porosity value. Based on the results of the tests it is concluded that the replacement of 25% cement by fly ash for the three concrete grades has better physical properties with immersion in peat water. Keywords : Concrete, fly ash, peat water, porosity
Analisis Quality Of Services (QoS) Streaming Video Pada Jaringan Wireless Di Area Sub-Urban (Studi Kasus Desa Kepenuhan Raya, Kabupaten Rokan Hulu) Wakhidah Rohayati; Noveri Lysbetti Marpaung
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Sub-urban area is a residential area located in the suburbs, not far from the city center.Kepenuhan Raya village is one of the sub-urban areas that hasn't used wireless networks for too long. Streaming is a form of technology that allows files to be used directly without waiting for the completion of the upload / download and takes place continuously without interruption. This paper evaluates and analyzes Quality of services (QoS) on wireless networks located in sub-urban areas. Analyzing QoS includes Throughput, Delay / latency, packet loss and bandwidth. The results of the study were taken on workdays and holidays. From these studies the total bandwidth results obtained on workdays with measurements using four PCs is 19.55 Mbps and on holidays that is 18.78 Mbps. In Video Streaming QoS the average value obtained in the morning measurement is 12652588.991 bit/sec Throughput, 0.006 S Delay, and 0% Packet Loss in the morning. With data received as many as 28005431.17 Bytes and delivery time 183.8504 seconds. During the daytime, the Throughput value is 386484.83 Bits / sec, Delay 0.023 S, and Packet Loss 0%. With data received at 9105377.2 Bytes and sending time of 196.839 seconds. At night, the Throughput value is 1141260,380 Bits / sec, Delay 0.005 S, and Packet Loss 0%. With data received at 21232293.8 Bytes and sending time for 182.491 seconds. From these results it can be concluded, the greater the value of the data received, the greater the throughput too. If throughput is large, the smaller the value of Delay and Packet Loss. Keywords: Sub-Urban Area, Wireless, Streaming, QoS
Rancang Bangun Sistem Kontrol Mesin CNC Milling 3 Axis Menggunakan Close Loop System Ikhlash Syukran Harrizal; Syafri Syafri; Adhy Prayitno
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
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Abstract

A multi axis of CNC machine needs a circuit control systems that function as the engine's brain. The purpose of this research is to design and developing a circuit control of the CNC milling machine with 3 axis movement. All machining parameters would be setup and operated through the control system so that the machine can operate in accordance with the design in three axes. In the design of the control system used 3 stepper motors as a driver, where each was enabled to move the engine against the x, y, and z axis. There are several steps that must be done in this design, such as the selection of control element data. Furthermore, control elements consisting of Breakout Board, Motor Driver, Stepper Motor, Power Supply, Limit Switch, and Emergency Stop are assembled according to schematic control design. The control system was connected to the PC through the Mach3 software interface to be used to drive the actuator. Prior to use for machining processes, the control system needs to be calibrated so that the machine's sliding dimension matches the command dimensions of the PC. Control system on CNC machines designed using a close loop system where there was a Limit Switch as a feedback sensor to the engine, so what if there was a mistake (error) on the track machine, then the sensor would command the spindle back to home position.Key Words : CNC, Control System, Elements of Control, Mach3, Close Loop
Analisis Keandalan Sistem Proteksi Kebakaran Pada Bangunan Ayola First Point Hotel Pekanbaru Wulandari, Bheti; Trikomara, Rian
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This study is intended to determine the value systems of fire and building safety reliability of Ayola First Point Building of Hotel Pekanbaru in case of fire. Questionnaire of this study was done twice. Analytical Hierarchy Process (AHP) was used for the first questionnaire in order to find out the weighting of fire variable which covers the completeness of its siting, rescuing utilities, passive protection system and active protection system. The second questionnaire used check-list method based on Minister Rules for General Work Number 26 Year 2008 in order to obtain the building’s reliability value in case of fire. The results for the said value for Ayola First Point of Hotel Pekanbaru using AHP and check-list method are, respectively, 91,93% and 91,45%. Therefore, it is concluded that the building’s safety system in case of fire is in “Good” condition.Keywords: Fire, Reliability, AHP
Pembuatan Na2O/Fly Ash sebagai Katalis Pada Proses Transesterifikasi Minyak Sawit Off Grade Menjadi Biodiesel Surya, Andry Pratama; Helwani, Zuchra; Saputra, Edy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

A fly ash supported sodium oxide (Na2O) catalyst used in transesterification reaction of off-grade palm oil for biodiesel production. The catalyst synthesized by loading Na2O from sodium nitrate (NaNO3) into fly ash micro pore through impregnation method. The optimum catalyst preparation conditions were determined by influence of calcination temperature and weight ratio of NaNO3/fly ash. Catalyst with highest catalytic activity was achieved when calcined at 550oC and proportion of NaNO3/fly ash is 90:10. Under the conditions of oil : methanol ratio of 1:8, catalyst dosage of 4 wt% and temperature of 60oC for 3 h, the biodiesel yield reaches to 89,12%. Na2O, SiO2, NaNO3 and Na2O2 were found in the catalyst through X-ray diffraction (XRD) while the basic strength of the catalyst H_ > 9,3 was determined by using Hammett indicator phenolphthalein. Surface area of the developed catalyst is 21,651 m2/g through Brunauer-Emmett-Teller (BET). Characteristics of biodiesel such as density, kinematic viscosity, acid value, flash point has been matched with standard for biodiesel specification of Indonesia.Keywords: biodiesel, sodium oxide, catalyst, fly ash, impregnation, calcination, transesterification.

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