cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota pekanbaru,
Riau
INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Engineering
Arjuna Subject : -
Articles 3,145 Documents
 253   254   255   256   257 
Sistem Keamanan Sepeda Motor Padang, Junelka Lisendra; Marpaung, Noveri Lysbetti
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The increase in theft motorcycle is influenced by the increased of purchasing power towards motorbikes. The theft was due to lack of security in those motorcycles. Form this problem, a motorcycle safety system is made. To make this system an Arduino Uno with C language programming is required to turn on and turn off a motorcycle. Form the test results, the system can turn on and turn off motorcycle when it is needed form different place to avoid that theft. If the motorcycle ON, the LED indicator lamp will turn on and if the motorcycle is OFF the LED indicator light will turn off too. Keywords : Security System, Motorcycle, Arduino Uno, Language C, LED Indicator Light.
Analisis Tingkat Laju Infiltrasi Pada Sub Daerah Aliran Sungai (DAS) Kampar Outlet Rimbo Panjang Septria Dwi Hawari; Siswanto Siswanto; Trimaijon Trimaijon
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

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Infiltration is the process of entry of rainfall or surface water into the soil (subsurface) through the gap or pore space of the soil. The infiltration process is a very important part of the hydrological cycle which greatly affects the amount of water that is on the surface of the soil. In the area Rimbo Panjang-Pekanbaru has experienced changes in land use due to infrastructure development. Infiltration on each land use varies if the nature or type of soil is different. The instrument used to measure infiltration in the field is the double ring infiltrometer and the analytical method use the Horton method. Procedures for measuring infiltration rates in the field using SNI 7752:2012. Data obtained from the field in the form initial infiltration rate and constant infiltration rate. The results of the actual reduction data obtained the largest decrease of 7,2 cm and the smallest decrease of 0,1 cm. The largest initial infiltration capacity is 165 cm/hours and the smallest initial infiltration capacity is 3 cm/hours. The largest infiltration rate 152 cm/hours and the smallest infiltration rate 2,68 cm/hours. In the Rimbo Panjang-Pekanbaru area, the infiltration rate is in the slow, moderate and very fast class with the highest total volume value of 708,81 mm in the 2,75 hours and the smallest total infiltration volume valume 9,93 mm in 1 hour. Keywords: Infiltration, Horton Method, Subsurface Runoff
Analisa Pemasangan Kapasitor Bank Di Gi Pauh Limo Sebagai Akibat Kegagalan Operasi Unit Pembangkit Lusi Novia Werdian; Edy Ervianto; Dian Yayan Sukma
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pauh limo substation located in padang west Sumatra has one bank capacitor. This research of evaluate the effect of capacitor installation at the Pauh Limo substation when one of the generating units experiences a trip / disturbance. To find out how much influence the voltage correction due to the installation of capacitors to improve the voltage when the power unit operation fails which results in a voltage drop can be determined by making a simulation using ETAP 12.6.0 software. When a trip occurs in the Ombilin power plant, the voltage at each GI experiences a varying voltage drop. So that the voltage at GI LBALG has the highest voltage, namely 147.5 kV, and GI SHARU has a voltage of 146.5 kV. When the simulation results of the power flow are in normal conditions without the installation of capacitor banks at the PLIMO GI, the GI PIP substation has the highest voltage, namely 145.5 kV, Meanwhile, GI SHARU has a voltage of 144.1 kV which is the lowest voltage. The lowest voltage drop percentage is 4.09% in GI SHARU. Meanwhile, during normal conditions, with the installation of the INDRG GI capacitor, it has the highest voltage, namely 148.4 kV, and GI SHARU has the lowest voltage, namely 147.5 kV. The lowest percentage of voltage drop is 1.69%. Comparison of the GI voltage without capacitor installation under normal conditions and the ombilin trip GI LBALG generator operates in swing mode, so that the voltage at the LBALG GI will remain the same at the 147.5 kV level. Meanwhile, the GI voltage with the installation of the capacitor under normal conditions and the overall ombilin generator trip, the INDRG GI experienced the largest voltage drop, namely 147.3 with a voltage drop of 0.746775%. Keywords: Transmission System, Substation, Capacitor Bank, Voltage Drop,Software ETAP 12.6.0.
Perancangan Dan Pengukuran Antena Mikrostrip Fleksibel Untuk Pendeteksi Tumor Payudara Rando Saputra; Yusnita Rahayu; Yuyu Wahyu
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In this research, a flexible microstrip antenna using the Coplanar Waveguide feeding technique was applied for breast tumor detection. The antenna is designed and simulated using HFSS 15.0 simulation software and operates at frequency of 4-6 GHz with a wide bandwidth which is 3.5 GHz (5.5 GHz - 9 GHz). The flexible microstrip antenna using a flexible PET (polyethylene) substrate has a value of εr = 3 and a thickness of 0.135 mm is printed with silver ink as a patch and ground material. The antenna was measured by simulation using breast phantom, and an additional 1 mm of tumor as a comparison of the measurement result. The return loss result from measurement using breast phantom with tumor are -29 dB at frequency of 4.9 GHz, and measurement for breast phantom without tumor are -31.5 dB at frequency of 4.5 GHz. For the bandwidth obtained, both of them get a width of 2 GHz (3.6 GHz - 5.6 GHz). Keywords: Flexible Microstrip Antenna, Bandwidth, Coplanar Waveguide, Polyethylene
Perancangan Sistem Pakar Diagnosa Penyakit Mata Menggunakan Metode Certainty Factor Monica Oktavianti; Feri Candra; Zulharman Zulharman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The development of computer technology helps people to solve their problems, for example is Artificial Intelligence. The smarter the system and information handled, the more active role played by computers and there has been an increase in people interest using computers for artificial intelligence. One of the areas of artificial intelligence engineering that is quite attractive is expert systems. Expert system is a computer that designed to copy the expert knowledge. Expert system can be implemented in the hospital. clinics etc. Expert system in this research is using certainty factor method for diagnosis of eye diseases. This method helps people and provide solutions to the symptoms experienced by the user. The results of this study are the diagnosis of eye diseases, the information of the diseases, solutions and early treatment methods for eye diseases. By using black box testing, an accuracy of 94.4% is obtained.Keywords : Expert System, Eye disease, Certainty Factor
Pengaruh Pemotongan Co-Axial Pada Proses Pemesinan Turn-Milling Terhadap Kekasaran Material Aluminium 6061 Fajar Pratama Putra; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Turn and milling processes in machining can be referred as turn-milling processes, where working tool and cutting tool works simultaneously. So in this cutting proces, the chip is produced by a cutting tool that is tangent on the bottom part. The main factor in the machining process is the result of surface roughness. The method of this research is using co-axial turn-milling by applying variations to the rotational speed of the tool and the speed of rotation of the workpiece, so the surface quality produced influences by the parameters of the machining process in the form of tool rotation speed and workpiece rotation speed. The purpose of this research is to find out the surface roughness value and to determine the effect of tool rotation speed and workpiece rotation speed on the surface roughness value of aluminum 6061. In result, the higher the rotational speed of the tool and the speed of rotation of the workpiece, the roughness value on the 6061 aluminum workpiece will be smaller. Based on the roughness class, the parameter of tool rotation speed is 2500 rpm with the workpiece rotation speed of 800 rpm is the best parameter in this study with a roughness value of 0.862 µm. Keyword : Turn-milling, Co-axial, Tool rotation speed, Workpiece, Surface roughness.
Analisis Kadar Air Biochar Dengan Bahan Baku Tandan Kosong Kelapa Sawit (TKKS) Nisa, Ulfatun; Sasmita, Aryo; HS, Edward
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Biochar can increase soil C levels and can increase plant growth by supplying a number of nutrients to improve soil physical and biological properties. The raw material for making biochar is Empty Palm Bunches (EFB). EFB are rich in lignocellulose (cellulose, hemicellulose and lignin). Biochar was made using a pyrolysis device at 400oC for 2 hours and flowed with 100 ml/minute N2 gas. Biochar from EFB in this study has met the requirements for activated carbon based on SNI 06-3730-1995, with a water content of 1,45%. Keywords: Biochar, Empty Palm Bunches (EFB), water content
Pengaruh Penambahan Glutathione (GSH) Terhadap Mikroalga Chlorella sp. Dalam Menyisihkan Logam Ni Limbah Cair Elektroplating Menggunakan Airlift Bioreactor Karamy, Afrilia Geishy; Elystia, Shinta; Hs, Edward
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

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

An alternative technology for removing Ni metals of electroplating wastewater is biosorption using microalgae Chlorella sp. Chlorella sp. has the ability to respond to the toxic effects of heavy metals by forming phytochelatin. Phytochelatin can be synthesized enzymatically from glutathione (GSH) which response to metal ions. The purpose of this study is to know the effect of the addition of GSH on the process of metal biosorption. The study was conducted with variations in the addition of GSH (0, 5, 10 and 15 mg/L) and variations in contact time (1, 2, 3, and 4 days). Based on the results of the study, The highest removal of Ni metal at 4 days contact time with the addition of GSH 15 mg/L with removal efficiency of 83%. Keyword: Chlorella sp., glutathione (GSH), limbah cair elektroplating, Ni, Phytochelatin
Implementasi Plasma Tegangan Tinggi Untuk Pengolahan Limbah Cair Industri Minyak Sawit nadeak, Parade; Murdiya, Fri; Andrio, David
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Water pollution due to waste has become a concern of environmental activists recently. Many technologies have become alternatives to overcome this, such as the use of high voltage plasma.High-voltage plasma technology is included in green technology because it does not use chemicals and with high-voltage plasma technology, processing waste is faster, does not require large areasof land and is environmentally friendly. This research aims to reduce Biochemical Oxygen Demand (BOD) compounds, chemical Oxygen demand (COD), total suspended solid (TSS) by utilizing highvoltage plasma. The method used is to generate plasma using a Neon Power Supply transformer with the voltage of 8 kV and with a frequency of 21 kHz. The plasma is generated by using rod andplate electrodes. Based on the results of plasma experiment, it is able to reduce BOD, COD, TSS compounds in palm waste. In this study the test was carried out with different distances of 2 mmand 4 mm with a time of 20 minutes, 30 minutes, 40 minutes and 60 minutes. This test shows that a distance of 2mm is faster to reduce BOD, COD TSS than a distance of 4mm.Keywords: Plasma, high voltage, liquid waste, BOD, COD, TSS
Prarancangan Pabrik Akrilonitril Menggunakan Proses Sohio Dengan Disain Alat Utama Kolom Absorber (A-101) Natalia Natalia; Said Zul Amraini
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Acrylonitrile has the potential to be used as an additive in the chemical industry including the manufacture of thermoplastics, adiponitrile for the nylon industry, acrylamide, resin, synthetic rubber, acrylic fibers for the acrylic fabric industry and ABS (Acrylonitrile Butadiene Styrene) resin for the manufacture of plastic goods. The use of acrylonitrile which is quite varied makes acrylonitrile needed in large quantities in Indonesia. Based on data from the Central Statistics Agency for the past 5 years, the demand for acrylonitrile in Indonesia is between 1000-6000 tons/year. Acrylonitrile is produced by the Sohio process using propylene, ammonia and air as raw materials. The acrylonitrile plant operates for 300 days per year in 24 working hours per day with a production capacity of 128,000 tons/year. This factory produces acrylonitrile with a purity of 99.47% as the main product while the byproducts are acetonitrile and hydrogen cyanide. The location of the acrylonitrile plant establishment is planned in the Basilam Baru area, Sungai Sembilan District, Dumai City, Riau Province. The design of the main tool of the absorber column (A-101) is useful for separating ammonia gas that is not completely converted from the resulting product using sulfuric acid as a solvent. Unneutralized ammonia causes ammonia to react with acrylonitrile to form various impurity and acid precipitates to polymerize hydrogen cyanide. This absorption process will produce Ammonium Sulphate. The absorber column with packed bed column has a height of 4.2084 m with a column diameter of 0.5588 m. The type of packing used is rasching ring made of ceramic which is shaped like a hollow cylinder ring with a size of 4 in with a torispherical flanged dished head. Fixed Capital Investment (FCI) of this acrylonitrile plant is $ 59,018,469.7 and Working Capital Investment is 15% of Total Capital Investment (TCI) of $ 10,415,024.1 so that the Total Capital Investment (TCI) value is $ 69,433,493 ,7. The total production cost of the acrylonitrile plant is $226,071,844.0 while the net profit after tax is 35%, which is $406,667,476 and the net cash flow of the acrylonitrile plant is $408,880,669. Return on Investment (ROI) after tax is 59.54%, Pay Out Time (POT) is 1.57 years and Break Event Point (BEP) is 35%. The IRR value of the acrylonitrile factory is 22.67% greater than the bank's RRR value of 22.55%, and the Net Present Flow (NPV) value of $ 2,504,738,736.6 is greater than the Total Capital Investment (TCI) value. From the economic analysis, the acrylonitrile plant is feasible to establish. Keywords: absorber, acrylonitrile, packed bed column, propylene, sohio process

Page 255 of 315 | Total Record : 3145

 253   254   255   256   257 

Filter by Year

2014 2022


Reset
Filter By Issues
All Issue Vol 9 (2022): Edisi 1 Januari s/d Juni 2022 Vol 8 (2021): Edisi 2 Juli s/d Desember 2021 Vol 8 (2021): Edisi 1 Januari s/d Juni 2021 Vol 7 (2020): Edisi 2 Juli s/d Desember 2020 Vol 7 (2020): Edisi 1 Januari s/d Juni 2020 Vol 6 (2019): Edisi 2 Juli s/d Desember 2019 Vol 6 (2019): Edisi 2 Juli s/d Desember 2019 Vol 6 (2019): Edisi 1 Januari s/d Juni 2019 Vol 6 (2019): Edisi 1 Januari s/d Juni 2019 Vol 5 (2018): Edisi 2 Juli s/d Desember 2018 Vol 5 (2018): Edisi 2 Juli s/d Desember 2018 Vol 5 (2018): Edisi 1 Januari s/d Juni 2018 Vol 5 (2018): Edisi 1 Januari s/d Juni 2018 Vol 5, No 1 (2018): Wisuda April Tahun 2018 Vol 5, No 1 (2018): Wisuda April Tahun 2018 Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017 Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017 Vol 4, No 1 (2017): Wisuda Februari Tahun 2017 Vol 4, No 1 (2017): Wisuda Februari Tahun 2017 Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016 Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016 Vol 3, No 1 (2016): Wisuda Februari Tahun 2016 Vol 3, No 1 (2016): Wisuda Februari Tahun 2016 Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015 Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015 Vol 2, No 1 (2015): Wisuda Februari Tahun 2015 Vol 2, No 1 (2015): Wisuda Februari Tahun 2015 Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014 Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014 Vol 1, No 1 (2014): Wisuda Februari Tahun 2014 Vol 1, No 1 (2014): Wisuda Februari Tahun 2014 More Issue