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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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Pengaruh Variasi Putaran Pisau Potong Dan Geometri Mata Pisau Potong Mesin Shredder Penghancur Batang Kelapa Sawit Fajri, Aidil; Yohanes, Yohanes
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

Recently, the utilization of palm stem waste has been studied and explored by many researchers. One of them is the use of small pieces of palm stem as material for making particle board and laminated board. Processing of palm stems into small pieces can be processed by crusher system method. The shredder machine is the type of crusher machine, which incorporate with a rotating cutting of sharp blades that can destroy palm stem. However, his research did not get the optimal result because of limited research done to see the capabilities of the machine. To get optimal result need more research about crushing system, this research was to optimize the performance a shredder machine with some modifications for the engine system such as variations in the round cutter blade and geometry of cutter blade shredder machine. This research used experimental method to investigate the optimal result for crushing of the palm stem. Then, effect of variations the round cutter blade and geometric of cutting blade were tested in some conditions. Therefore, the result of this research might be expected to produce the optimal small pieces of palm stem.Keywords: Waste of palm stem, Shredder machine, Optimal results.
Perancangan Dan Pembuatan Generator Fluks Radial Tiga Fasa Magnet Permanen Kecepatan Rendah Andika Andika; Amir Hamzah
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

Based on wind speed data from Meteorology and Geophysics Agency, Indonesia has an average wind speed of about 3-6 m / s. Wind speed can be categorized at low wind speed. So the power station needs a low-speed generator. One solution found from this problem is the development of low speed power plant technology. The wind power plant has an important component of which is a generator which is an electric machine that convert mechanical energy into electrical power. By utilizing a low speed and high torque of the direct drive system of the wind turbine. In designing this low-speed generator the magnetic field is made of neodynium magnets. The generator is designed with a speed of 750 rpm, frequency 50 Hz, induced voltage 15 V and 3 phase. Permanent magnet used with a diameter of 20mm and 3mm thick. The tests included zero load testing, load testing, anchor resistance testing, short-circuit testing and calculating voltage regulation. At the load-bearing load and weightless testing there is a decrease in stress due to the load, where the voltage regulation at the R phase is 16.1%, the S phase is 16.8% and the T phase is 13.2%. The yielded generator voltage phase S is 10.1 Vac, voltage phase R is 10.2 Vac, and then voltage phase T is 10.3 Vac.Keywords: Radial flux generator, neodynium magnet, design result
Biodegradasi Pestisida Berbahan Aktif Profenofos Dengan Metode Land Farming Menggunakan Streptomyces sp. Miska Alemina Ginting; Aryo Sasmita; Elvi Yenie
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

Profenofos an organophosphate insecticide, has been widely used for control insect pests. Bioremediation is one of the treatments to reduce residue of profenofos in soil . This result aims to know the profenofos bioremediation abilities of Streptomyces sp. in soil sample and to know the efficiency of profenofos degrading in variation factors of Streptomyces sp and compare with the quality standards of Department of Environment and Conservation regulation. The fixed variable used in this study is initial concentration of profenofos is 100 mg/kg soil, aerated every 7 days, and added distilated water every 14 days. The changeable variable used different concentration of Streptomyces sp. consists of variations in soil was 0 ml/kg (control), 10 ml/kg, 20 ml/kg . Based on the results of the research after 21 days incubation, Streptomyces sp. abled to remove profenofos in soil and the maximum degradation efficiency was added 20 ml/kg Streptomyces sp. in soil which was 96.21 % . For others efficiency was 95.759 % which added 10 ml/kg and 93.54 % as control.Keywords: Pesticide, Profenofos, degradation, bioremediation, Streptomyces sp.
Analisis Potensi Interferensi Sistem LTE Dengan EGSM Di Pita 800 MHz Muttaqin, Abdul; Rahayu, Yusnita
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

LTE and EGSM frequency spectrum in Indonesia are located on adjacent frequency channel. This could potentially cause interference among the systems. This study focuses on the analysis of potential interference between downlink LTE (LTE base station as an interferer) versus uplink EGSM (EGSM base station as a victim of interference). This interference could potentially lower the quality of the signal reception on the EGSM base station. In this study, interference between LTE and EGSM on 800 MHz frequency band will be analysed by using SEAMCAT simulation software. From the simulation’s results obtained, the interference of both systems is eliminated by adding the guard band. The guard band distance of 4.5 km for URBAN environment and the distance of 5.5 km for SUB URBAN provide the highest C/I ≥ 12 dB, respectively.Key words: LTE, E-GSM, guard band, interference, SEAMCAT.
Adsorpsi Zat Warna Methylene Blue Dengan Menggunakan Abu Sawit Sebagai Adsorben Rizaldi Riski Irawan; Edy Saputra; David Andrio
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

The industrial waste especially textile waste is one of the causes of environmental problems that require effective and efficient processing. Adsorption is a separation method that is simple, easy to operate, flexible, affordable cost anddoes not produce toxic products. The purpose of this study calculates theefficiency of decreasing the concentration of the colors contained in metyhleneblue dye and studying the adsorption capacity to variations in pH 2, 4, 6, and 8, adsorbent mass variation 1; 1,5; 2; and temperature variation 40º, 60º, and 80º. The maximum wavelength of the dye methylene blue 660 nm.The efficiency of 98,07 % decline in the highest concentration. Isothermcorresponding to methylene blue dye adsorption by spent bleaching earth isLangmuir isotherm with adsorption capacity to variations in pH of 4,592 mg/g, the adsorbent mass variation of 4,592 mg/g, the temperature variation of 3,565mg/g.Keywords: Adsorption, Methylene Blue, Fly Ash, Efficiency Decreased Concentration, Adsorption Capacity
Deteksi Keretakan Pada Pipa Menggunakan Sinyal Suara Dan Dual Mikrofon Suhardi Panjaitan; 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

Piping system is used for fluid distribution in various fields of industry. When compared to other transportation systems such as vehicles, piping systems have a higher level of integration and are more effective. The need for pipeline is increasing in the industrial sector. Therefore, various types of damage that can occur in the pipeline system are important to be assessed and prevented. Detection of pipe damage is very important to prevent various losses and work accidents. Pipe damage in the form of crack is a problem that often occurs in pipe systems. In this study, the detection of damage to the pipe is done using sound signals and dual microphones. The sound signal method is an intelligent structural health monitoring that can prevent damage at a lower cost. Sound excitation was generated by loadspeaker and the response of the sound signal is sampled using dual microphones. Sound signal data from dual microphones is processed using wavelet transforms. From the experimental results it was found that the greatest wavelet coefficient of the microphone position is estimated to be the polar position of the damage. Keywords: Sound signal, dual microphones, crack, wavelet transform
Manajemen Sistem Informasi Perlengkapan Dan Peralatan Bengkel Sepeda Motor Umum Skala UKM (Usaha Kecil Dan Menengah) berbasis Komputerisasi Simaskot, Johar; Arief, Dodi Sofyan; Susilawati, Anita
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

Motorcycle repair shop management is to manage the motorcycle workshop to be effective and efficient. Good workshop management must also be supported by a properly administration, in order to record all the resources that become workshop assets. Moreover, the motorcycle workshop also conducts spare parts sales to complete the replacement needs of broken vehicle spare parts. This study aims to analyze and design a workshop information system for small and medium enterprises (SMEs) engaged in the field of repairing of motorcycle. Generally the SMEs motorcycle workshops in this research, still uses a simple management system and manually in presenting the data required by the workshop. This it make difficult and inconvenient for the owner of a small and medium-scale of motorcycle workshop. Sequence, it is necessary to optimize the management system and change the simpler manual system to be computerized. One way is by implementing the 5S (Sort, Straighten, Shine, Standardize, Sustain) methods and creating an information system that can manage equipment in SMEs scale of motorcycle workshops. Stages of the method in this study: (1) survey of general workshop management SMEs scale, (2) do analysis of data obtained during the survey and provides input for workshop management based on 5S method, (3) to design and create information systems and databases using PHP (Hypertext Preprocessor) as the programming language and MySQL as the database. By implementing 5S management and this information system can help streamline the services of SMEs scale of motorcycle workshops.Key Words: Motorcycle Workshop management, 5S Method, PHP, MySQL, Information System.
Potensi Likuifaksi Tanah Pasir Diatas Tanah Lunak Dengan Variasi Jenis Tanah Lunak Melalui Uji Model Laboratorium Erik Azarya Ginting; Agus Ika Putra; Soewignjo Agus Nugroho
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

In each region has a different type of soft soil, for example peat soils, soft silt soils and soft clay. Pekanbaru, the capital of Riau Province, located on the island of Sumatra where the island of Sumatra itself is an area that has a high intensity earthquake because it is located in the ring of fire. One of the earthquake impact is liquefaction. Liquefaction is a phenomenon in which the strength and stiffness of soil is reduced due to an earthquake or other earth movement. This is a process of changing the nature of the soil from solid state to a liquid state. The aim of this research to figure out the influence of soft soil variation as the native layer of sand embankment and acceleration of vibration against increase of pore water pressure and soil settlement. This research was conducted by laboratory model test using shaking table. Variations of soft soil under sand embankment used are peat soil, soft silt soil and soft clay respectively 10 cm thick and given a uniform load of 40kg / m2. Water level elevation as thick as the sand layer of each variation. The test results showed that silt soil has the largest soil settlement and pore water increase. Silt soil variation tends to require a short period to reach maximum soil sttlement during liquefaction. As the acceleration of vibration increase caused larger soil settlement and pore water pressure, but it required faster time for pore water pressure to stable.Keyword: Liquefaction, shaking table, peat,silt,clay,embankment
Analisis Perilaku Portal Beton Bertulang Dengan Tulangan Fibre Reinforced Polymer Suriyati Suriyati; Ridwan Ridwan; Zulfikar Djauhari
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

Fiber reinforcement is currently widely used as an alternative to conventional steel reinforcement at reinforced concrete because its material properties are resistant to corrosion and have a high tensile strength. This research aims to analyze the comparison of reinforced concrete portal behavior using FRP and steel reinforcement. The model used in the analyzed is portal 2D with and without shear wall that use limits of based on ACI 440.1R-2015 and SNI 03-2847-2013. The analyzed result revealed that the use of FRP bar can reduce the amount of bars significantly. For the case of concrete portal without shear wall was 25% less than compared to that FRP of steel bars. Moreover, for the case of portal with shear wall, the use of FRP material can reduce the amount at bars used until 33%. This can be inferred because ultimate strength and modulus elasticity of CFRP is 2070 MPa and 152000 MPa, while ultimate strength of conventional steel is only MPa with the modulus of elasticity of 200000 MPa. Keywords: Reinforcement FRP, Conventional Steel Reinforcement, Reinforcement CFRP
Model Laboratorium Pola Aliran Pada Krib Impermeable Terhadap Variasi Debit Dan Posisi Krib Di Sungai Berbelok Hasibuan, Bangun Sugito Riski; Mudjiatko, Mudjiatko; Rinaldi, Rinaldi
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

Crib is building cross river that serves as building steering flow to protect riverbanks from attacks the current flows. Model laboratory used to demonstrate the phenomenon of pattern flows that occur around the crib at the maender. Crib models used in this study is crib type impermeable with dimensions of length 0.15 m, width 0.03 m and high 0.15 m. The flow rate used is 0.00134 m3 / sec (Q1), 0.00298 m3 / sec (Q2) and 0.0056 m3 / sec (Q3). Position crib used is 0 ° (S1), 15 ° (S2) and 30 ° (S3) to turn the corner. Distance between crib is 30 cm and the configuration crib angle of 135 ° tothe wall outside of the turn. The pattern flows at each position variation crib with debit Q1, vortex flow occurs in the space between the crib and crib with a radius lengthy of the vortexis relatively short. The pattern flows at each position variation crib with debit Q2, vortex flow occurs around the crib witha radius lengthy of the vortex is relatively modest. The pattern flows at each position variation crib with debit Q3, vortex flow occurs before at the crib, a space between the crib and crib with a radius lengthy of the vortexrelatively long. Overall,phenomenon the pattern flow of the most well occur indebit Q1 position crib S2.Keywords: patterns of flow, maender, crib type of impermeable

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