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INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Core Subject : Engineering,
Engineering
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Articles 3,145 Documents
 184   185   186   187   188 
Peluruhan Batang Grafit Baterai Bekas Dengan Metode Electrochemical Exfoliation Menggunakan Pelarut Amonium Sulfat Dan Kalium Sulfat Michael Hutapea; Amun Amri; Rozanna Sri Irianty
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 way to exfoliate the graphene is by electrochemical exfoliation graphite (EEG) method which is the method for graphene synthesis by splitting graphite material into graphene sheets through the electrochemical process. The objective of this research is to synthesis graphene from used battery graphite rod using [(NH4)2SO4] and (K2SO4) and to determinethe effect of solvent variation and solvent concentration on the graphite decay rate. The results showed that the increase of solvent concentration increased the yield. The highestyield for the solvents [(NH4)2SO4] and (K2SO4) were 10,6% and 15,3% repectively. The result of UV-Vis spectrophotometric wave peak was ~270 nm that indicating the peak of graphene.Raman spectroscopy analysis result showed that the graphene was nanoplatelet (multi-layer) and the number of graphene layers was ~3-10 layer. FTIR analysis showed the functionalgroups after decay process on graphite. The best conductivity was K2SO4 solvent 1,5 M is 0,0621 Ω-1.cm-1.Keywords: electrochemical exfoliation graphite, graphene, graphite.
Optimalisasi Daya Output Solar Photovoltaic Dengan Sistem Dual Axis Sun Tracker Berbasis Microcontroller Jamarrintan Jamarrintan; Iswadi Hasyim Rosma
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

Solar photovoltaic (SPV) is one of renewable energy sources that has been used widely during past decades. Generally, SPV panels are installed at certain titled angle. This method of installation has its own disadvantage, such as when the sun moves away from the SPV panel, the energy produced by the SPV panel becomes decreased. Therefore, this article aims to design and utilize the Dual Axis Sun Tracker (DAST) system to overcome these problems. This DAST system uses four LDR sensors as sun position detectors, an Arduino microcontroller is used as controller system and two servo motors are implemented on the vertical axis and horizontal axis in order to move SPV panel to have perpendicular sunlight. The DAST system has been tested and compared to fixe tilted angle SPV panels with 2 conditions, namely the fixed titled angle SPV panel facing east and west, respectively. The tilted angle was also varied with 5 variations, namely 00, 150, 250, 350 and 450. The field data have been collected for 5 days in Pekanbaru city, Indonesia. From the results of the comparison it can be seen that the SPV panel with the DAST system provide much greater energy gain compared to fixed titled angle SPV panel.Keywords: Arduino, Dual Axis Sun Tracker, Energy, Solar Photovoltaic, Sun Tracking System
Hubungan Tingkat Pendidikan Dan Kepadatan Penduduk Dengan Tempat Penampungan Sementara (TPS) Ilegal Di Kota Tembilahan Annisa Nur’alifa; Jecky Asmura; David Andrio
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

Tembilahan is the capital city of Indragiri Hilir, it has 67.74 km2 area and has 89,404 population. The amount of garbage which has been increasing as long as the growth population. Social factors that influence waste management are factor of education and factor population density. The purpose of this study is to analyze the relationship between level education and population density towards ilegal dumping. This research was conducted with a survey method directly to the study area. The result were The education level of respondents towards illegal dumping increased as the increasing number of high school graduation respondents. Based on the histogram of population density comparison to the number of illegal dumping, high and low population density doesn’t affect the number of illegal dumping.Keywords : Ilegal dumping, level education, population density
Analisa Kinerja Localizer Sebagai Instrument Landing System Dari Perspective Rangkaian Elektronika Telekomunikasi Karimansyah Putra; Indra Yasri
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

Instrument Landing System is navigational aids aircraft landing, localizer is part of the ILS function to provide information of air straightness on the runway. This paper discusses the localizer performance in the perspective of telecommunication electronics i.e. the series of power amplifier and recombiner monitoring. The proposed method through a modelling of the manufacturer's specifications and compared to the field measurement. Overall, the comparison result shows within the manufacturing specification with indicating less than 0,2% error.Keywords : Instrument Landing System, Localizer, Power Amplifier, Monitor Recombiner.
Kuat Tekan Beton OPC Abu Terbang (Fly Ash) Di Air Gambut Arnef Frenki; Alfian Kamaldi; Monita Olivia
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

This study examines the mechanical properties of Ordinary Portland Cement (OPC) concrete and OPC concrete containing fly ash immersed in peat water. Fly ash as a pozzolanic material with high silica content is used as substitution of 25% of the volume of cement. The designed concrete strength was 21 MPa. Concrete Specimens was made in the cylinder mould with a diameter of 105 mm and height of 210 mm. The samples were first cured in fresh water for 28 days and then they were immersed in peat water for 7 and 28 days. The mechanical properties was evaluated by measuring the compressive strength of the concrete specimens. The total number of test specimens was 9 pieces, with 3 test specimens for each variation and testing age, which is without immersion, 7 and 28 days immersion in peat water. The pH value of peat water was ranging from 3.0 to 5.0. The result showed that the compressive strength of OPC concrete immersed in peat water decreased while the compressive strength of OPC concrete containing fly ash was dependent of how long the specimen was cured in peat water. The compressive strength of OPC-21 decreased by 7.08% at 28 days immersion in peat water while the compressive strength of OPC-FA-21 showed an increase of 8.81%.Keywords: Compressive strength, OPC, Fly Ash (FA), peat water
Evaluasi Sistem Drainase Di Wilayah Kampus Universitas Islam Negeri Sultan Syarif Kasim, Riau Wendi Nofriandi; Bambang Sujatmoko; Andy Hendri
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

A University should have an integrated drainage system so that when it rained, there is no a flood that disrupts the activity of students and teachers on campus. Floods with a height of 5 to 10 cm that ever happened on the campus of UIN SUSKA Riau is the problem of existing drainage systems on the campus of UIN. The drainage that was built in 2016 are expected to resolve the problem of flooding. This study aims to evaluate the drainage system of the UIN SUSKA’s campus use return periode of 2, 5 and 10 years. The data that are used in this research are rainfall’s data, drainage network map, topographic maps and maps of land use. HEC-RAS 4.0 program was used to building model the flow of discharge into the drainage channels of  UIN’s campus. The results showed that the existing drainage is not able to withstand the flood discharge on  return periode 2, 5 and 10 years with a high range of pools is 8 to 11 cm. Then, the evaluation that is done on a planned drainage to be indicating that the planned drainage capable of accommodating the flood discharge with return periode 2, 5 and 10 years.This indicates that the integrated drainage system on a campus, capable of resolving the problem of flooding in the area  Keyword : floods, drainage, HEC-RAS 4.0
Analisis Kecepatan Routing Discovery Untuk Routing Protocol AODV, OLSR, Dan ZRP Pada Mobile Ad Hoc Network Tulus Rahayu; Ery Syafrianti; Linna Oktaviana Sari
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

Ad hoc network is wireless network without a consistent node infrastructure. Every node could be used as a router to track another node in a network. Ad hoc could use several routing protocols. AODV, OLSR, and ZRP are among of them that are efficient for Ad Hoc network within each of their own type of routing protocol. Every routing protocol has different ability and various speed in order to track routing path in a network. The aim of this research is to determine Routing Discovery time for routing protocol AODV, OLSR, and ZRP in mobile ad hoc network (MANET). The research used the scenario where node's position is random within determined area. The results show that the routing discovery time for protocol AODV, OLSR, and ZRP are 0.035811829 seconds, 5.817611777 seconds and 1.052782493 seconds, respectively. Thus, AODV routing protocol has faster routing discovery time than the routing protocol OLSR and ZRP. Keywords : Ad Hoc Network, routing protocol, routing discovery, AODV, OLSR, ZRP.
Karakteristik Tegangan Tembus AC Pada Material Isolasi Padat Campuran Resin Dengan Alumina (AL2O3) Abdul Rasyid; Fri Murdiya
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

Resin is the polymer material that can be used as high voltage insulators that have high volume resistivity, lighter, high insulation strength and good mechanical strength.Alumina (Al2O3) is one of oxide ceramic that is widely use in the electronic and mechanical material. This research proposes the breakdown voltage test on alumina filler with varies of weight i.e 0.1gr, 0.2gr, 0.3gr, 0.4gr, 0.5gr, 0.6gr, 0.7gr, 0.8gr, 0.9gr, 1gr, 1.1gr, 1.2gr , 1.3gr, 1.4gr, 1.5gr, 1.6gr, 1.7gr, 1.8gr, 1.9gr and 2gr, respectively. The shape of dimension sample is presented in 2x2x2cm with two electrode (needle and plane electrode) inside alumina and resin 0,5cm gap.Keywords –resin, alumina (AL2O3), discharge current, breakdown voltage
Analisis Biaya Dan Produktivitas Pemakaian Alat Berat Pada Kegiatan Pembangunan Jalan Akses Siak IV Pekanbaru Devid Nugraha; Rian Trikomara Iriana; Sri Djuniati
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

Road construction requires heavy equipment in its work, one of them is road layer. Heavy equipments which currently use is dump truck, excavator, motor greder, water tank truck, tandem roller and wheel loader. The number of heavy equipment to itemized work selected heap, Class B aggregate and A class aggregate are 1 unit excavator, 1 unit wheel loader, 15 unit dump trucks, 1 unit grader motor, 2 unit tandem rollers, 1 unit water tank, selected heap work which use the provisions of the owner is 9 days and the contractor 11 days, class B aggregate work using the provisions of the owner are 7 days and 9 days contractor, A class aggregate work using the provisions of the owner are 5 days and 7 days contractor. The differences in the cost of heavy equipment is Rp.121.650.532 or higher by using contractor's heavy equipment. To determine the heavy equipment with a more efficient cost with a saving percentage of 12.93% then, the contractor must meet the provisions made by the owner with the economical life tool, the condition of the machine and eligible labor.Keywords : Cost analysis, heavy equipment, productivity, road layer
Peningkatan Produksi Produk Menggunakan Lean Manufacturing System (Studi Kasus : UKM Mie Aceh Alya) Toni Darji; Anita Susilawati; Dodi Sofyan Arief
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

Mie Aceh Alya is a small-scale house hold industry engaged in culinary making wet noodles. Process of making Aceh Alya’s noodles includes preparation of raw materials, mixing dough, printing and cutting, boiling, and cooling and packaging. To meet the demand of the product is often in overtime and delay of product delivery. The objectives of the research is to identification of waste occurring in the production process, to analyze the cause of the waste and to recommend the improvement on the production process, and to evaluate the quality of the product so that the productivity improvement can be achieved. The reseach conducted a case study in small scale industry i.e. Mie Aceh Alya. The research method used lean manufacturing system approach and Value Stream Mapping (VSM) method. Based on the calculation of the initial stage of the design can reduce lead time on the current production floor from 548,12 minutes to 438,95 minutes, so the company can produce more quickly and the delay of product delivery can be eliminated or reduced. Result of entification using WRM method was obtainad three biggest wastes that was defect of 14.86%, motion 14.61%, and prosess of 14.61%. The selection of detail mapping tools with Value Stream Analysis Tools (VALSAT) method was obtained the greatest value of PAM. From Process Activity Mapping (PAM) analysis obtained the was value added equal to 322,48 minutes or 58.83% from total time and 41.17% for non value added based improvement recommendation can decrease lead time at production floor of 1,82 hours.Keywords: Lean manufacturing system, VSM, Waste

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