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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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Terminal Bus Kuantan Singingi Dengan Pendekatan Struktur Sebagai Elemen Estetika Saputro, Aris; Hidayat, Wahyu; Djuniati, Sri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Kuantan Singingi is a city district that has a fairly dense population with population data from 2010-2015 experiencing an increase of 0.013 per year. Kuantan Singingi Regency has the potential to develop a terminal if it functions according to the needs of the community by providing transportation in and out of the province and therefore the City of Taluk Kuantan should have a terminal that facilitates the need for (AKDP) and floats a stopover at the Inter-City Transport Terminal Province (AKAP) which crosses the city of Taluk Kuantan. Research methods used through field surveys, literature reviews and documentation. Kuantan Singingi Terminal is designed with the theme Structure As Aesthetic Elements applied to column and beam structures that apply the characteristic of Ornamentation Structure. The concept used is taken from the formation of the vehicle's engine, namely the Machine Gear. The results of this design are focused on the circulation system that directs and does not confuse the user. Keywords: Bus Terminal, Structure as Aesthetic Element, Kuantan Singingi.
Kajian Pasang Surut Dengan Metode Least Square Di Perairan Kabupaten Bengkalis Muhammad Yoganda; Andy Hendri; Imam Suprayogi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Analysis of tidal components can be done with several methods, namely least square method, admiralty and so forth. The least square method is a tidal harmonic analysis method used to analyze and to predict tides in this research. Daily observation data of 15 days in each hour will be simulated against 158 variations of time using Hijri calendar, to find out the initial variation of observational data that best matches the tidal prediction in Bengkalis waters. The analysis was carried out using tidal data in the waters around the port of Roro Bengkalis. The analysis results show that the smallest average root mean square error (RMSE) value is on the initial variation of the 30th data for verification of the simulation data. The 30th days of the Hijri calendar is in the new moon phase.The tidal type of the location of the research based on the value of the Formzahl number was classified at the double mixed tide prevailing type (mixed tide prevailing semidiurnal).Keywords: formzahl, least square method, RMSE, tide prediction
Pengaplikasian Pengolah Data Pengukuran Kebulatan (Roundness) Pada Alat Ukur (Roundness Tester Machine) Di Laboratorium Pengukuran Teknik Mesin Universitas Riau Eko Jadmiko; Dodi Sofyan Arief; Adhy Prayitno
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Measuring clock or dial is a comparison device usually used in industrial activities, especially in production. To make measurements at this time must be supported by technology that can facilitate operators when using it and when analyzing measurement results. Involving the programme and microcontroller are a solution to developing in roundness measurement, and then the results can be more accurate or thorough between the readable values read from the measuring instrument with the actual value of varying the amount of data. Roundness application is a program that can input measurement data automatically and can do calculations directly. Then, it can display a reference circle, a table that calculates the values of X, Y, R, X’, Y’, R’, Roundness Deviation, Run out Concentricity or a shift in the center point and also the center point shift or Theta. In measuring roundness, the test object is used the Standard Mandrel which has been certified by PT. Global Quality Indonesia, by determining three points or positions, namely in the first position the amount of data is 180, in the second position the amount of data is 90 and in the third position the amount of data is 60 with a rotating speed of 15 mm/s. The results of the reference circle can be seen in each calculation in each position, in the second position the roundness deviation values are approaching of the Mandrel. Key word : Roundness application, position, measurement, data variation
Pengolahan Limbah Cair Sawit Untuk Menyisikan TSS Menggunakan Chlorella Sp. Yang Diimmobilisasi Ca-Alginat Di Dalam Flat-Fotobioreaktor Hasti, Fucy Adilla; Elystia, Shinta; Muria, Sri Rezeki
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Industry of palm oil continues to develop so that production of palm oil increases followed by increasing by-products in the form of waste. The biggest waste is Palm Oil Mill Effluent (POME) wastewater and needs to be treated because containing high organic matter. Utilization of microalgae carried out to wastewater treatment process. POME is used as a medium and nutrient for microalgae growth. Chlorella sp. immobilized with calcium alginate to remove of TSS parameter on POME. In this study, variations of wastewater concentration are 50%, 75%, 100% (v/v), and different source light i.e. artificial light and sunlight sources, and the contact times 0,1,3,5,7 (days ). Based on the results that Chlorella sp. able to growth well in a medium of 50% wastewater concentration using artificial lightsource on 7th days and removal efficiency of TSS obtained to 76.43%. Keywords: Palm Oil Mill Effluent, TSS Removal, Immobilization of Alginate, Flatphotobioreactor
Sintesis Serbuk Hidroksiapatit Menggunakan Metode Mechanochemical Siska Priscillia Aledya; Ahmad Fadli; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Hydroxyapatite (HAp) is a material that has the same structure and material composition with the main minerals of teeth and human bones so it can be used as bone and dental implants. The purpose of this study was to synthesis hydroxyapatite, determine the effect of variations in the ball sizes and the ratio of a mass of precursors to balls size of crystals and particles, and morphology of hydroxyapatite produced by the mechanochemical method. First, 0,5 gram Calcium Oxide (CaO), 0,6 gram ammonium dihydrogen phosphate (NH4H2PO4) and 10 ml distillate water with a mole ratio of Ca/P 1,67 were milled using Shaker Mill PPF UG. Two different ball sizes (3mm and 6mm) and three different PBRs (1:1,439; 1:2,878; and 1;4,318) were used in this methode. Precursor and balls were milled in milling speed 850 rpm for 6 hours with interval every 15 min paused for 5 min. The slurry dried in an oven with 120°C for 2 hours then sintered at 900°C for an hour. The synthesized powder was analyzed by XRD, PSA, and SEM confirmed the formation of HAp structure with nanocrystallite size, morphology in all variables. The crystallite size increased with increasing PBR. At PBR 1:2,878 and ball size 6 mm was obtained crystallite size about 24,78 nm with 95% crystallinity. The particle size decreased with increasing PBR. Morphology of hydroxyapatite was ununiform to granular with mol ratio Ca/P 1,81.Keywords: ball mill, hydroxyapatite, mechanochemical, powder to ball ratio
Smk Pariwisata Di Pekanbaru Dengan Pendekatan Prinsip Desain Le Corbusier Arifia Azas; Pedia Aldy; Gun Faisal
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The Tourism Vocational High School with Le Corbusier's Design Principles Approach is a forum that holds formal school activities based on tourism vocational practices to face the professional world, in accordance with Le Corbusier's design principles. Le Corbusier, the originator of modern architectural styles, has a functional and simple view in the application of architectural design. Le Corbusier's architectural style will support the building function of the Vocational Tourism School as a school and implement simplicity. This design aims to be able to support teaching and learning activities of Vocational Tourism that are based on practice. The research methods used include field data collection, literature studies and empirical studies. The results of this study design a building that accommodates Vocational Tourism teaching and learning activities with Le Corbusier's design principle approach in terms of functional forms in accordance with their functions as schools, applying simplicity, and applying other Le Corbusier design principles and creating buildings that are in accordance with the rules precedent architecture of Le Corbusier.Keywords: Le Corbusier, Precedent Architecture, Tourism Vocational High School
Pembangunan Sistem Monitoring Data Kualitas Udara Berbasis Iot Di Universitas Riau Middinali, Nadjum; Rahayu, Yusnita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Air Quality is very important for life. Air monitoring is very necessary to anticipate the dangerous air pollution. Excellent air monitoring done in real time, so that the monitoring data obtained directly. In the research make aplication air monitoring real time device using internet of thing in waspmote plug and sense for monitoring of PM10 and waspmote OEM for monitoring CO and O3, data communication using Zigbee. Application Microsoft Visual Basic 2010 used as processing and connection to database MySQL. Design database air monitoring to connect monitoring so data can be stored. Application will process waspmote data to ISPU data for reference condition the air content PM10, CO dan O3, will display ISPU in Website. The research also compares the result of sensor monitoring with AQMS in BLH and BMKG Pekanbaru. Keywords : Internet of Thing, Zigbee, Database, Real time, Air polution, Website
CaO Berbasis Kulit Telur Ayam Dengan Penambahan Karbon Aktif Dan Natrium Hidroksida (CaO-NaO/C) Sebagai Katalis Untuk Sintesis Biodiesel Dari Minyak Sawit Off-Grade Rahayu, Ricky Puji; Helwani, Zuchra; Amri, Amun
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Chicken eggshells CaO based catalyst with the addition of activated carbon and sodium hydroxide (CaO-NaO/C) has been successfully synthesized for production of biodiesel from palm oil off-grade. The catalyst was characterized by X-Ray Diffraction analysis (XRD), Brunauer-Emmett-Teller (BET) and basic strength while the characterization of biodieselwas by Gas Chromatography-Mass Spectrometry (GC-MS). The catalyst was synthesized by calcining the chicken eggshell as source of CaCO3 at the calcination temperature of 900 ˚C for 3 hours. The CaO was then supported by activated carbon as catalyst buffer andimpregnated with 30% NaOH solution. The catalyst with the highest catalytic activity was obtained at calcination temperature of 500 ˚C and mass ratio of CaO:C at 6:4. The yield of biodiesel amounted to 79.08% were obtained by transesterification process with the molarratio of oil:methanol 1:10, catalyst concentration of 1%-b oil and reaction temperature of 65 ˚C for 3 hours. The CaO, Na2CO3, Ca(OH)2 and CaCO3 were found in the catalyst through the (XRD) while the basic strength of the catalyst H_ was > 9,3 determined by using Hammett Indicator phenolphthalein. The specific surface area of the catalyst obtainedthrough analysis by the (BET) method was 18.880 m2/g. Characteristics of biodiesel such as density, kinematic viscosity, acid number, and flash point have matched with the standard for biodiesel specification. Some methyl esters formed such as methyl palmitate and methyloleate were found in biodiesel through analysis of (GC-MS).Keywords : Biodiesel, catalysts, calcium oxide, activated carbon, transesterification
Analisis Faktor Dominan Penyebab Terjadinya Pembengkakan Biaya (Cost Overrun) Pada Proyek Konstruksi Gedung Kategori Besar Dan Menengah Di Kota Padang Tahun 2017/2018 Taufiq Alhakim Hendri; Rian Tri komara Iriana
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Construction in every sector which has been done in Padang is an effort to revamp facilities and infrastructure as Padang Citizens’ activities needs. The complexity and characteristic of a project needs a good management to avoid cost overruns. This research aims to determine the validity’s level of dominant factors which cause cost overrun. This research was conducted by spreading 40 questionnaires to contractors whose classified as to middle and major category, whether are currently carrying out the project or have completed the project construction in Padang. The obtained data is processed by using a specified statistical application program. The result showed that the dominant factor which causes cost overruns to the building construction of major category based on the questionnaire’s questions; (1) too many work’s repetitions because of poor quality reaches 85,30% (2)according to the field of coordination of human resources: lack of labor reaches 85,94% (3) according to the field of control: Job delay reaches 75,92%, meanwhile, the middle category construction shows that: (1) according to the field of implementation changing frequency reaches 86,28% (2) according to the field of resources coordinator: Lack of materials reaches 79,91% (3) according to the field of accounting coordinator from government reaches 84,34%. Keywords: Cost, Overrun cost, Dominant factor, Questioner, Respondent`s profile
Biokonversi Kertas HVS Bekas Menjadi Bioetanol Dengan Variabel Konsentrasi Saccharomyces cerevisiae Sisi Oktadira Kalpatari; Chairul Chairul; Yelmida Yelmida
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

One effort to overcome the scarcity of oil fuels is by finding alternative fuels from renewable natural resources. Biomass waste is one of the energy sources in the form of lignocellulose which can produce bioethanol. Indirectly, used Hvs paper is cellulose which has a lot of waste. The level of consumption of Hvs paper in Indonesia and in the world continues to increase. The consequence of increasing consumption of Hvs paper has a high impact on the waste paper produced. The large amount of paper waste available provides an opportunity for efforts to utilize the paper waste. The utalization of used Hvs paper is usually only recycled into Hvs paper again, but the quality is not as good as initially. This study is aimed to convert used Hvs paper become bioethanol because used Hvs paper still contains cellulose as its main raw material. In this study, The process of making bioethanol from used Hvs paper has done with the pretreatment, hydrolysis and fermentation stages. The pretreatment process uses NaOH, then the hydrolysis process with dilute acid is used 1.5 M, hydrolysis temperature of 1300C, time of 120 minutes, The last process is fermentation. The fermentation process was carried out by varying the concentration of yeast which is 1 gr, 3 gr, 5 gr and fermentation time which is 48 hours, 96 hours, 144 hours, and 192 hours. In acid hydrolysis, the maximum sugar concentration was produced at 131.23 gr / L. The best concentration of yeast in this study was 5 grams at the best fermentation time of 144 hours with bioethanol levels obtained at 6% or 47.36 g / L.Keywords: bioethanol, fermentation, hydrolysis, Saccharomyces cerevisiae, Hvs paper

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