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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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Sintesis Hidroksiapatit Dari Precipitated Calcium Carbonate (PCC) Cangkang Telur Ayam Melalui Proses Sol Gel Dengan Variasi pH Dan Waktu Aging Alpina, Clara Shinta Asri; A, Yelmida; Zultiniar, Zultiniar
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

Hydroxyapatite Ca10(PO 4)6(OH)2 is a compound of calcium phospate which is a bioactive, biocompatible and bioresourable. Hydroxyapatite (HAp) can be used as a bone implant,adsorbents and catalysts. Hydroxyapatite synthesis can be performed by using raw materials which is rich in calcium such as egg shell. Calcium in the form of Calcium Carbonate(CaCO3) on the chicken egg shell in this study changed to be precipitated Calcium Carbonate (PCC) through the process of carbonation. PCC from chicken egg shells used as a source of calcium in the synthesis of HAp with a sol gel method. In the synthesis of HAp, the varied of this method is pH (9; 10; and 11) and the aging time (24 hours; 48 hours; 72 hours). The analysis result of HAp synthesis with Fourier Transform Infrared Spectroscopy (FTIR) showed that the apatite compound has been formed with the absorption of PO4 3- ion at the wave number 1,025. .The highest transmittance obtained on the sample at the pH 9 aging time 24 hours; pH 9 aging time 48 hours and pH 9 aging time 72 hours. Based on X-ray Diffraction (XRD) analysis, the best HAp obtained in pH 9 aging time 72 hours with monoclinic crystal structure, with particle size was 53.89 nm. The result of SEMEDX analysis showed the morphological form agglomerate. The mole ratio of Ca and P hydroxyapatite from PCC of egg shell was 1.52 and 2.755 m 2/g surface area.Keywords: Precipitated Calcium Carbonate (PCC), Chicken Egg Shell, Hydroxyapatite, Sol gel Method, Aging Time
Analisis Perencanaan Bendung Sei Lansat Daerah Irigasi Simandolak Kabupaten Kuantan Singingi Farizki Afdalindra Ihsan; Siswanto Siswanto; Manyuk Fauzi
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

Weir is a building that serves to raise the water level of the river in order to pursue high specific energy needs, in addition to the wier also serves to divert the flow of a stream to a channel, in order to provide for the availability of water supply. Sei Lansat weir planned for the purpose of raw water supply to the irrigation area simandolak. Using design flood for 100 year =38.646 m3/det . Sei Lansat weir stability analysis. Stability in terms of stability against sliding, overtuning, and seepage flow. The results of analysis of stability against sliding is FK=3.668 >1.5, stability against overtuning is FK=3.399>1.5, and the value of analytics Lane is a safe WCR = 3.90 on the rocky ground being (gravel being).Keyword: Weir, Stability, Irrigation
Deteksi Kerusakan Pipa Dalam Bentuk Kebocoran Menggunakan Sinyal Suara Dan Dual Mikrofon Hariadi Hariadi; Feblil Huda
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The piping system is an important feature in the industrial world because it has an effective and efficient transportation function used for shipping such as liquid and gas fluids. Prevention of damage either leakage or blockage is very important because it can reduce the number of losses both economic, natural environment, and even loss of life. The use of sound signals to detect and find leaks in pipes with experimental studies. This method can be used because it is very sensitive to discontinuities in the pipe that can detect damage at a relatively lower cost. This method uses sound impulses emitted through the loudspeaker as excitation and the response of the sound signal will be recorded using a dual microphone sensor. Sound signals are given for leakage under conditions of using water and without water of different sizes, positions and polar sides. The sound signal data will be processed using the Fast Fourier Transform and Wavelet Transform methods. The test results showed that the amount of damage given is directly proportional to the amplitude generated and the wavelet coefficient of each microphone sensor will increase as it approaches the polar side of the damage. Keywords : Sound Signal, Leakage, Fast Fourier Transform, Wavelet Transform, Dual Microphone
Pengendalian Korosi Dengan Menggunakan Daun Nanas Sebagai Green Inhibitor Pada Baja ASTM A36 Viona Aulia Rahmi; Komalasari Komalasari; Rozanna Sri Irianty
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

Corrosion is a decline quality of a metal because of chemical reaction a metal with its environment. The use of inhibitors is one way of corrosion control on metals, especially on the inside of the pipe. Pineapple leaf extract can be used as a green inhibitor. This study aims to utilize pineapple leaf extract as a green inhibitor about concentration of the inhibitor in controlling the corrosion rate by varying the time of the metal immersion. Extraction is done with a ratio of ethanol: distilled water, which is 1: 4. Research variations were corrosive media (0.1 M H2SO4), inhibitor concentrations (0, 2 gr/L) and immersion time (16, 32 and 48 hours). The method used is the weight loss method. The lowest corrosion rate in 0.1M H2SO4 solution is a concentration of 2 gr/L and a 48 hour immersion time of 20,686 mpy. The highest inhibitor efficiency in 0.1M H2SO4 solution concentration of 2 gr/L and time immersion for 48 hours amounted to 85.48%. It can be concluded that more inhibitors on corrosive media are able to produce low corrosion rates with high inhibition efficiency.Keywords: corrosion rate, inhibition efficiency, inhibitor, pineapple leaf
Optimasi Desain Crash Box Tipe Square Dengan Beban Impak Arah Aksial Putrawani, Eky; Akbar, Musthafa
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
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Abstract

Crash box is one of the passive security system technology that serves to absorb impact energy when the car suffers a collision. The Crash box has a parameter crashworthiness which is a parameter that indicates the durability of structures to protect a passenger during collision. The crashworthiness parameters in the crash box is energy absorption (EA), primary Peak Force (Pmax), mean crushing force (Pm), crushing force efficiency (CFE), and specific energy absorption (SEA). In this research conducted optimization of the design of the crash box with numerical analysis using software-based finite element method Abaqus CAE ver. 6.14-2. This research was conducted to get the design of the crash box which has the most optimal crashworthiness parameter value of some model of the square type crash box design with an impact load axial direction. The design Model of the crash box is analyzed include adding design modifications using triggers, multi segments, and rib. The selected crash box Material used is Alumunium AA6060-T4. Base on analysis carried out the design model of the crash box with the addition of rib (R06) as a design model that has the most optimal crashworthiness parameters. The R06 design Model increases energy absorption (EA) by 0.02 kJ (0.37%), lowering primary peak force (Pmax) by 10.72 kN (21.16%), increasing mean crushing force (Pm) of 0.11 kN (0.37%), increasing crushing force efficiency (CFE) of 15.81% (27.32%), but lowering the specific energy absorption (SEA) of 0.91 kJ/kg (4.63%). Keyword : Crash Box, Design Optimization, Crashworthiness Analysis
Kaji Eksperimental Variasi Diameter Turbin Angin Propler Terhadap Performa Turbin Angin Hybrid Fadel Firanda; Iwan Kurniawan
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

In this research carried out innovation in wind turbine that generate power using wind energy. Where two different wind turbines are combined into a hybrid wind turbine. There are conventional wind turbine (propeller) and wind ball energy (venturi). Both types of wind turbines are still in the same axis of the shaft. This research is done with the intention that this hybrid wind turbine can work well at low wind speeds. This study was conducted to determine the addition of wind turbine propeller performance after the merger with wind ball energy. The hybrid wind turbine performance is measured on each diameter variation of propeller wind turbine’s blade. So we get the right ratio between the diameter of the propeller wind turbine and wind ball energy in this hybrid. In this study using three variations of wind turbine propeller diameter, there are 160 cm, 200 cm and 240 cm with 3 pieces of blade on each variation. Propeller’s blade profile using NREL S833. Wind ball energy were later added in front of propeller turbine. Number of wind ball energy’s blade is 5 pieces with a diameter of 0.5 meters. From the test results known that with the addition of a wind ball energy on a propeller wind turbine with smallest diameter has the greatest percentage increase in performance among the three variations of wind turbine propeller diameter. Key word: wind ball energy, wind turbine, hybrid
Analisis Tingkat Penerimaan Pengguna Layanan Cloud Storage Menggunakan Metode Technology Acceptance Model 3 (TAM3) Pada Dinas Perpustakaan Dan Arsip Kota Pekanbaru Adinda Zilly Arsyika; Ery Safrianti; 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

Data are valuable information in an agency or an institution, both engaged in politics, culture, education, economics and etc. Therefore, data very important to be properly maintained and stored by the relevant agencies. Nowadays, data are no longer just archived on a piece of paper but also stored in a storage medium that uses internet network to access it. Library and Archives Service (DISPUSIP) in Pekanbaru,Riau Province, Indonesia is a government institution that embodies the seriousness of the local Government in Pekanbaru to educate the life of Indonesia. DISPUSIP Pekanbaru, has problems in managing data storage. In this case, it is necessary to have file management which includes data storage and file sharing in a computer that is made a server, so all data will be stored centrally. Data storage on a server side or known as cloud computing is a technology where is owners data do data storage on server storage or known as cloud storage. Cloud storage used in this study is OwnCloud. After OwnCloud operates, it is required analyzing the use of OwnCloud. OwnCloud is a private cloud service. With OwnCloud, IT can maintain complete control over all documents or archives in DISPUSIP, knowing exactly where the data is at all times and deciding who might or might not have access to certain documents and folders. This analysis is intended to determine the acceptance of Cloud Storage with a OwnCloud that will be assessed by DISPUSIP employees. Analysis in this study will use the Technology Acceptance Model 3 (TAM3) method by revealing the influences of 16 hypotheses. Computer Anxiety has a positive impact on Perceived Ease Of Use, Computer Self Efficacy has a positive impact on Perceived Ease of Use, Image has a positive impact on Perceived Usefulness, Job Relevance has a positive impact on Perceived Usefulness, Object Usability has a positive impact on Perceived Ease of Use, Output Quality has a positive impact on Perceived Usefulness, Perceived Ease of Use has a positive impact on Behavioral intention, Perceived Ease of Use has a positive impact on Perceived Usefulness, Perceptions of External Control has a positive impact on Perceived Ease of Use, Result Demonstrability has a positive impact on Perceived Usefulness, Subjective Norm has a positive impact on Image, Subjective Norm has a positive impact on Perceived Usefulness, Behavioral Intention does not have a positive impact on Use behavior, Computer Playfulness does not have a positive impact on Perceived Ease of Use, Perceived Enjoyment does not have a positive impact on Perceived Ease of Use and Perceived Usefulness does not have a positive impact on Behavioral Intention. From the test results 12 hypotheses have a positive impact and 4 hypotheses do not have a positive impact on research in DISPUSIP. Keywords: Cloud Storage, Cloud Computing, OwnCloud , Technology Acceptance Model 3 (TAM3), Library and Archives Service (DISPUSIP) Pekanbaru.
Pembuatan Grease Dari Minyak Biji Karet : Mempelajari Pengaruh Campuran Lioh-Ca(OH)2 Dan Rasio Base Oil Septiani Lestari; Irdoni Irdoni; Nirwana Nirwana
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

Grease is a semi-solid lubricant that is given between two metal objects that move independently or one of the moving objects while the other is stationary with the aim of reducing friction. Grease is applied to industrial and automotive machinery. Rubber seed oil is non edible oil because it is toxic, so it has the potential to be a grease. This research aims to make grease using rubber seed oil, studying the effect of ratio mol metal LiOH:Ca(OH)2, as well as the effect of comparison of metal soap:base oil on the quality and characteristics of grease. The research stage is: raw material preparation includes extraction of rubber seed oil by pressing method, then degumming process using phosphoric acid (85%) 0.5% (w/w), temperature of 90oC, for 1 hour and centrifuge for 20 minutes. Then the process of making metal soap (thickening agent), 100 ml of rubber seed oil is heated to a temperature of 70oC, then added LiOH:Ca(OH)2 metal while stirring with a stirring speed of 650 rpm for 30 minutes. Furthermore, the process of making grease, rubber seed oil as a base oil is mixed with metal soap (thickening agent) according to predetermined variables. The mixing process was carried out at a temperature of 70oC then metal soap (thickening agent) was added to the reactor and stirred with a stirring speed of 650 rpm for 30 minutes, after the temperature of the mixture reached 120oC additives added 5% w/w and a stirring time of 3.5 hours. Then the grease test is carried out, namely the dropping point test based on ASTM D566 and the penetration test based on ASTM D217. The best results on the soap formula 90%:10% and the grease formula 75%:20%:5% obtained dropping point 145oC, penetration 240 (0.1 mm) and NLGI 3.Keywords: grease, rubber seed oil, dropping point test, penetration test
Perancangan Antena Luar Ruangan (Outdoor) Mikrostrip Mimo Rectangular Patch 28 Ghz Untuk Jaringan Komunikasi Nirkabel 5G Mustofa, Ivan Rafli; Rahayu, Yusnita
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

Nowadays, intensive research on 5G MIMO microstrip antenna is increasing due to the high data rate required. Frequency 28 GHz is one of the allocation frequency approved by FCC. In this paper, MIMO 2x2 microstrip patch antenna using microstrip feeding line is dessigned for 5G wireless communication network. This antenna uses an array technique to increase the gain of the antenna. The antenna is designed and simulated using CST Microwave Studio simulation software and operated at 28 GHz. From the simulation result, the impedance bandwidth obtained is 1,95 GHz or 6,96% with return loss of -44,77dB, the simulated gain reaches 18,5 dBi. The designed MIMO 2x2 microstrip antenna meets the 5G requirements.Keywords : 5G Antenna, MIMO, Dual-Band Antenna, Microstrip Antenna Array.
Pengaruh Pretreatment Aerasi Kultur Tercampur Anaerob Terhadap Proses Aklimatisasi Pengolahan Limbah Cair Produksi Minyak Sawit Pagattari, Hirda Nopma; Andrio, David; Andesgur, Ivnaini
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

Palm Oil Mill Effluent (POME) has potential for anaerobic treatment because it has COD concentration 50.000 – 70.000 mg/L. In this research, mixed cultures that we used is from cow dung. To increase concentration of bacteria on inoculum and decreased lag phase on anaerobic process, anaerobic mixed cultures should get seeding and acclimatized process. The bioreactor of seeding and acclimatization using circulating batch reactor, with volume 15 L and 5 L, respectively. Ratio wastewater to biomass bacteria was 70:30 (% v/v). This research used 3 variations of aeration time of mixed culture that is 0, 12, 24 and 36 hours. The parameter observed in this research was VSS and COD. Seeding process was doing in 5 days with final VSS on day-5 was 8.280 mg/L and total COD concentration was 36.454 mg/L. Acclimatization process was doing on three stages, 5 days each stage. The highest reduction of COD at the third stages of acclimatization was found within reactor with 24 hours of inoculum aeration pretreatment was 62% with 1.180 mg/L/day of increasing VSS.Keywords : POME, mixed culture, aeration pretreatment, seeding, acclimatization

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