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
 278   279   280   281   282 
Dampak Tinggi Gelombang Signifikan Terhadap Kekeruhan Di Selat Bengkalis Theo Hasido Silalahi; Sigit Sutikno; Koichi Yamamoto
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

Bengkalis island is the main island of Bengkalis Regency, Riau Province, where the district capital is located and is the border of Indonesia and Malaysia. Bengkalis island often experiences a reduction in shoreline (abrasion) which can reach 38.02 meter/year and an additional shoreline (sedimentation) which can reach 29.77 meter/year. The process of abrasion and sedimentation occurs as a result of a series of waves that rub against the shore and transport sediment. Sediment transport can take the form of suspended loads, this is what causes the Bengkalis strait to become turbid, turbidity can be bad for the ecosystem and construction around the strait. Is is the necessary to study the effect of significant wave height and turbidity around the Bengkalis strait. This study use Turbiditymeter to collect turbidity data, the equipment will be assembled and placed on the bottom of the straitfor 2 month. The result of this study indicate that significant wave height has a effect on the turbidity at the study site.Keywords: significant wave height, turbidity, turbiditymeter
Pengaruh Waktu Dan Suhu Pretreatment Ampas Tebu Menggunakan Asam Sulfat Encer Astri Gusrita; Komalasari Komalasari
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

Currently, Indonesian is still relies on non-renewable energy sources (fossil). One of alternative to replace fossil fuel is with bioenergy such as bioethanol. Bioethanol can be produced from lignocellulose biomass such as sugarcane bagasse. Sugarcane bagasse is lignocellulose biomass with 39,26% cellulose, 7,49% hemicellulose, and 23,48% lignin. To take cellulose contained in sugarcane bagasse, a pretreatment process is needed. Pretreatment process is the process of removing lignin from cellulose. The purpose of this study is to determine the optimum conditions of the pretreatment process with time and temperature variation. The stages that carried out in this study are raw material preparation, pretreatment, and analysis. Preparation of raw materials is cutting bagasse up to 0,5 cm and dry it at room temperature. The pretreatment process used acid solvent with low concentrations of H2SO4 0,5 M with time variations of 30 minutes, 60 minutes, 90 minutes, and temperature variations of 60oC, 80oC, 100oC. Pretreatment analysis was performed using the Chesson-Datta method. The optimum pretreatment conditions in this study were at time variation of 60 minutes and temperature of 80oC, with 62,84% cellulose and 19,88% residual lignin. The temperature used in the pretreatment affects the length of time needed for the process to get optimum results. Keywords: cellulose, lignin, pretreatment, sugarcane bagasse
Pemanfaatan Ekstrak Daun Ketapang (Terminalia Catappa L) Sebagai Green Inhibitor Dengan Metode Maserasi Untuk Mengendalikan Laju Korosi Pada Aluminium Roin Nuretha; Komalasari Komalasari; Sri Rezeki Muria
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

Terminalia catappa L leaf extract has a considerable influence in decreasing the corrosion rate of a metal, because it contains tannin compounds which can be used as corrosion inhibitors. The purpose of this study was to determine the effect of addition of Terminalia catappa L leaf extract inhibitors on the corrosion rate of aluminum with variations in immersion time and determine the inhibition efficiency of variations in the concentration of Terminalia catappa L leaf extract on aluminum in corrosive media. The parameters varied in this study were the immersion time of the maceration process, the inhibitor concentration added in the corrosive solution of sodium chloride, namely 0, 1,5 and 2 g/L as well as variations in the time of corrosion testing at 36, 48, 60 and 72 hours. The time of maceration process shows that the longer the contact time, the greater the concentration of crude tannin, while the time of immersion of aluminum shows the longer the immersion time, the corrosion rate tends to decrease with the addition of inhibitors and the higher the value of inhibitory efficiency. The best crude tannin concentration was obtained during the maceration process for 6 days with a crude tannin concentration of 84,90 mg / L. The lowest corrosion rate was obtained when the addition of 2 g / L inhibitor in the corrosive NaCl medium with immersion time of 72 hours was 0,347 mm / year. The results showed that the best inhibition efficiency value using ketapang leaf extract inhibitor was added to the inhibitor 2 gr / L in 0,5 M corrosive media soaked for 72 hours with an efficiency value of 90,00%. Keywords: aluminum, corrosion rate, inhibitors, maceration, Terminalia catappa L leaf
Penerapan Novel The Da Vinci Code Pada Medan Fiction Center Dengan Pendekatan Arsitektur Simbolik Damanik, Yola Yohana; Aldy, Pedia; Faisal, Gun
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

The demand for providing facilities for fictional activities is inseparable from the role of the relationship between the user and the surrounding environment. The Artists and writers in creating works need the imagination to birth the inspiration. The main factor that becomes an element in giving birth to inspiration is the state of the environment and the atmosphere. The relationship between the nuances experienced by individuals will create certain emotions that can stimulate thinking in pervading the atmosphere so that they experience the urge to create works related to the atmosphere. Therefore, one of the largest metropolitan cities in Indonesia, Medan, needs to establish facilities in the form of Fiction Centers as a place for development and study centers, as well as appreciation aimed at supporting education, information, recreation, commercial, and appreciation of fiction. The application of The Da Vinci Code in design is expected to be a manifestation of the application of fiction into the built environment that produces architectural designs that can act as a medium of visual communication between the user and his environment so as to build emotional connections between users, functions, and buildings in order to turn on the sides of the imagination which is inspiring in giving birth to works of fiction. The research methods used include observation, documentation and secondary data in the form of case studies and comparative studies. The concept applied to the design object is "Code Inside Architecture" which is then influenced by the novel elements of The Da Vinci Code in its application and this concept also serves as a connecting point for the placement of each function. The results of this study are designing architectural objects that can arouse feelings and imagination and convey the message expected by the designer to the public through symbolic architectural principles. Keywords: Fiction Center, The Da Vinci Code, Symbolism.
Pengembangan Sistem Kontrol Kecepatan Pengelasan (Welding Velocity) Smaw Berbasis Microcontroller Arduino Uno Purnawan, Trio; 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

Welding is an important part of industrial growth because it plays a major role in engineering and production repair. Shield metal arc welding (SMAW) is a welding technique using an electric current that forms an arc of current and a webbed electrode. In the SMAW welding process, there are variables that determine the quality of the welding results, including the selection of electrodes, the selection of currents in the machine that must be adjusted, and the position and welding speed that must be precise. In welding, high speeds can cause less penetration, reduce joint strength and result in less heat input. Welding speed that is too high will affect the narrow bead shape and low bead reinforcement. In addition, it can change the mechanical properties of the weld area in the form of increased tensile strength and low elongation. From these problems, this research will make a speed control system for a stepper motor that drives a welding handlebar, a speed controller based on a microcontroller. Keywords : SMAW, speed controller, microcontroller
Prarancangan Pabrik Dimetil Eter Dari Tandan Kosong Sawit (TKS) Menggunakan Proses Indirect Synthesis Dengan Disain Alat Utama Reaktor DME Ruth E. M. Sinaga; Panca Setia Utama
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 need for renewable energy increases with the number of business and process that require biogas and dimethyl ether as the raw material in the manufacturing process. Dimethyl ether is widely used as refregerant, propellant in aerosol products, solvent, and extraction agent. The main raw materials used in manufacture of dimethyl ether by indirect synthesis process is palm empty fruit bunch. This plant is planned to operate for 330 days per year and work continuously for 24 hours/day with capacity of 50,000 ton/year which will be established in Dumai, Riau. The remaining time for 1 year of the operation process is used for shutdown, plant maintenance, maintenance and repair of equipment. The design of the main equipment in this plant is Dimethyl Ether fixed bed reactor which functions to generate dimethyl ether by methanol dehydration process. Reactor is operated at a pressure of 5 Bar and a temperature of 250 °C. The economic analysis on the design of this plant shows that the dimethyl ether plant from palm empty fruit bunch is feasible to be established with the profits that the plant gets after tax is Rp. 1,807,080,722/year and the plant's Payback Period (PBP) is 2.29 years. Keywords: Dimethyl Ether, Economic Analysis, Empty Fruit Bunch, Plant Design
Pemanfaatan Bionanomaterial Chitosan Sebagai Adsorben Untuk Penyisihan Parameter Zat Organik Pada Pengolahan Air Gambut Hasibuan, Nur Anisyah Handayani; Elystia, Shintia; Zultiniar, Zultiniar
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

Nanomaterials are nano-sized materials that can be formed from several its forming compounds. This research uses chitosan as an adsorbent in peat water treatment located in Rimbo Panjang Village, Kampar. Chitosan obtained from shrimp shell waste, with several stages of the process first carried out, such as deproitenation, demineralization and deacetylization. Furthermore, the process of making chitosan bionanomaterial using magnetic stirer speed of 1200 rpm and added 2% acetic acid and 200 ml Tripolyphospate (1mg/mL). The solution is then filtered and dried using an oven at 120o C for 2 hours. The independent variable peat water treatment used in this study were adsorbent masses of 1,3,5 and 7 grams and stirring time of 30, 60, and 90 minutes. The final concentration obtained in the from of reduction in removal of organic matter at 5,878 mg/L with a percentage value of 98,67% at the mass of the 5 gram adsorbent with 30 minutes.Keywords: Bionanomaterial Chitosan, Adsorption. Peat Water.
Pembentukan H2S Pada Proses Asidogenesis Limbah Cair Produksi Minyak Sawit M Kamal Syah; David Andrio; Nina Veronika
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

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

Abstract

Palm oil mill effluent (POME) had characteristics to COD, BOD, and protein a sequence of 40.823 mg/L, 15.309 mg/L, 40.500, 58,22 mg/L. pH was influenced the acidogenesis stage in anaerobic process. Additionally, in the stage of acidogenesis H2S was formed compounds, coused odor, inhibit bacterial growth, and corrosion on metal. The control of pH (acid, neutral and alkali) was required in order to optimize the formation of volatile fatty acids and inhibit the formation of H2S. This research is aimed to know the influence of pH and the detention time towards the elimination of H2S and know the influence of pH and the detention time of the formation of volatile acid and H2S. This research was conducted by varying pH the range of 4-4,5 (acid); 7-7,5 (neutral); 8-8.5 (alkali). The result of the research showed the lowest formation of H2S is on acids’ pH with the concentration of formation as much as 0,37 mg/L/hari and the detention time 120 hours. The highest formation of TAV was produced on acids’ pH (4-4,5) with the concentration rate of formation as much as 1.739,45 mg/L, and efficiency elimination 40,05 %. %. It can be concluded pH optimum of inhibhit the formation H2S is pH alkali. While pH optimum the formation TAV is pH acid. Keywords : H2S, total volatile fatty acid, acidogenic, POME
Prarancangan Pabrik Etilen Dari Cracking Nafta Menggunakan Proses Maxene Dengan Disain Alat Utama Reaktor Thermal Cracking Abdul Hafiz Hidayat; Komalasari Komalasari
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

Ethylene is one of the most important petrochemical substances and it’s uses as raw material for various products. The last products made with ethylene include food packaging, toys, food containers, bottles, pipes, antifreeze, carpets, insulation, household appliances, etc. Chemicals made from ethylene to produce end products such as polyethylene, ethylene dichloride, ethylene oxide, ethylbenzene, and vinyl acetate. The ethylene production process is carried out by feeding naphtha into the thermal cracking reactor and a production capacity of 155,000 tons / year is obtained. In the thermal cracking reactor design to break the hydrocarbon chain of naphtha, the feed temperature is 650 oC with a feed flow rate of 70,620.95 kg/hour dimensions of the thermal cracking reactor is 20 ft long, 40 ft wide and 100 ft high including chimney 100 ft. Heat (Q) required is 88,314,298.72 Btu / hour. The amount of Fixed Capital Investment (FCI) is $ 45,879,155.2. The Cost of Working Capital Investment (WCI) is $ 8,096,321,505 and the Total Capital Investment (TCI) cost is $ 53,975,476.7. The Cumulative Cash Ratio (CCR) values for nondiscounted and discounted 10% are 2.2 and 1.21, respectively. The amount of rate of return on investment (ROROI) is 22.7%, Pay Out Time (POT) for non-discounted profitability and discounted 10% profitability are 3.46 years and 6.84 years respectively, the value of the Discounted cash flow rate of return (DCFROR) is 13.55% and every 2% increase in sales and investment (FCI) there is a change in NPV of $ 129,886,499.71. Therefore based on the analysis that has been done it can be concluded that the factory is feasible to build. Keywords: ethylene, naphta, thermal cracking, total capital investment
Pemodelan Elemen Hingga Balok Beton Bertulang Yang Diperkuat Dengan Metode Deep Embedment Wan Muhammad Nurhud; Ridwan Ridwan; Alfian Kamaldi
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

The shear capacity of existing reinforced concrete structures is often unable to meet existing requirements. This decrease in strength can be caused by increased load, strong shear that is inadequate in initial design and material damage due to natural factors. Many methods that have been done are by means of external bonded (EB) method and near-surface mounted (NSM) method. However, shear resistance using the EB and NSM methods is prone to structural failures due to the magnification of this method only to contain an epoxy attachment and its blanket. To overcome this problem, the resistance method using deep embedment (DE) method have been proposed to reinforcement the shear capacity of existing reinforced concentrate structures. The resistance using DE method is the strenghtned shear capacity in kernel of reinforced concentrate beams. The purpose of this study was to analyze the shear behavior of reinforced concrete beams strenghtned by the DE method through finite element modeling. In this research, the existing reinforced concentrate structures put up the reinforcement by implant three kinds of steel carcass with 200 mm each gaps spread out shear beam. The maximum load result obtained from finite element analysis on reinforced concrete beams reinforced by the DE method was 31.81 kN. While the maximum deflection results obtained in finite element analysis was 8.32 mm. The failure model that occurs in the beam which is strengthened from the results of finite element analysis is the bending collapse. Keywords: shear reinforcement, deep embedement method, finite element model, shear capacity, reinforced concrete beams

Page 280 of 315 | Total Record : 3145

 278   279   280   281   282 

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