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
 231   232   233   234   235 
Potensi Likuifaksi Tanah Pasir Di Atas Tanah Lunak Dengan Variasi Tebal Timbunan Pasir Melalui Uji Model Laboratorium Bahrul Junaidi; 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

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

Abstract

Buildings in Riau, especially Pekanbaru City, are generally established on peatlands covered in sand embankment. Earthquakes often occur in the western region of the island of Sumatra due to its position along with two tectonic plate collision of earth, Indian and Eurasian plate. One of earthquake activity aftermath is liquefaction. Liquefaction can be defined as the loss of shear strength of soil due to an increase in excess pore water pressure caused by cyclical load, therefore the total stress of ground is almost entirely replaced by pore water pressure. The aim of this research is to know the influence of embankment thickness and acceleration of vibration against pore water pressure increment and soil settlement. This research was conducted by laboratory model test using shaking table. The acceleration variation used were 0.25 g and 0.32 g. The thickness variation of sand embankment used were 10 cm, 15 cm, and 20 cm placed on a 10 cm peat soil layer and given a load 40 kg/m2. Water level elevation as high as the sand layer each variation. The results of this research show that with the addition of the sand embankment thickness takes longer time to reach maximum pore water pressure increment. The thicker of sand embankment take longer time to reach maximum soil settlement during liquefaction. The addition of acceleration values leads to larger increment of pore water pressure and soil settlement, but the time it takes for pore water pressure begin to stabilize tends to be faster.Keyword : Liquefaction, embankment, peat soil, excess pore water pressure, shaking table
Analisa Implementasi Total Productive Maintenance (TPM) Dan Usulan Perbaikan Menggunakan Metoda 5S Pada Lini Produk Giboult Joint (Studi Kasus : CV. Sispra Jaya Logam Pekanbaru) Selera Sitepu; Anita Susilawati
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

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

Abstract

This study aims to analyze the implementation of Total Productive Maintenance (TPM), as a case study of giboult joint product line in CV. Sispra Jaya Logam Pekanbaru. The TPM approach is used Overall Equipment Effectiveness (OEE) as a metric for defining machine/equipment effectiveness. In the research method is to collect OEE data and calculate the OEE value per giboult joint work cycle. Then analysis of six big losses, statistical analysis using SPSS 20 and proposed improvements using the 5S method. Production data of giboult joint product line was collected for the period of June 2017. From OEE value calculation analysis found that the value of OEE on giboult joint product line was still below world class (85%). From the analysis of six big losses and statistical tests it was known that the most significant effect on the low value of OEE on the giboult joint product line for the breakdown losses and reduced speed losses. The high reduced speed losses was caused by slow production process. And the high breakdown losses was caused by the lack of effectiveness of the work of the machine and operator. Proposed improvement using the 5S method to increase productivity and production quality in the company.Keywords : TPM, Method 5S, Overall Equipment Effectiveness (OEE), Six Big Losses, SPSS 20.
Pemanfaatan Limbah Medis Padat Infeksius RSUD Arifin Achmad Pekanbaru Dengan Teknik Solidifikasi Sebagai Campuran Batako Bunga Fitriani Gumadita; Syaiful Bahri; Elvi Yenie
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

Hospital solid medical waste contain hazardous and toxic materials. One way to manage solid medical waste is a mixed hospital as one of the ingredients in the manufacture of concrete blocks. The purpose of this study was to test the initial testing and the final content of cadmium (Cd) and chromium (Cr) heavy metals through the test the concentration of heavy metals, and to test the compressive strength of concrete blocks. In this research, the B3 waste treatment method using solidification technology by varying the 0%, 10%, 20%, 30% and drying time 14, 21 and 28 days and the test concentrations of heavy metals. The results showed that in terms of compressive strength 28 days, brick with a variation of 10% of age 14 days 105 kg/ cm2, 10% aged 21 days 135 kg/cm2 and 10% u it 28 days to 200 kg/cm2 where it is strong pressure to rise. From the test results are known concentrations of heavy metals mostly heavy metal content is 30% at 0.00034 ppm Cd of 0.180 ppm after disolidifikasi. Likewise, 30% of heavy metals in Cr is 8.509 ppm 0,044 ppm of immobilized so well that solid infectious medical waste can be used as a mixture of brick that is safe for the environment.Keywords: Infectious Medical Waste Solid, brick, Compressive Strength, Solidification, Heavy Metal Concentration Test.
Sistem Pendukung Keputusan Dalam Menentukan Penjurusan Siswa Dengan Metode Simple Additive Weighting Berbasis Website Ahmad Syahfrizal; Feri Candra
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

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

Abstract

SMA Negeri 1 Kampar Timur is one of schools in Kampar regency which every year conducts the selection of majors for their students routinely. Selection of this majors intends students can complete their education in accordance with their interests and abilities before proceed to a higher level. Currently, process of major selection in the Senior High School Level has some weaknesses. For example, process needs a long time and the obtained results are less accurate because many mistake can be happened thar caused no special available system based on a computer to support the calculation to help in determining the majors. In this research, using PHP programming system and Mysql database as database server with Simple Additive Weighting Method (SAW) by using some criterion, suck as previous subject values in Junior High School (Natural Sciences and Social Sciences), the result of enterance test in the Senior High School, students interest, parents and counseling guidance teacher advice are used in this research. Final result of this research is a decision that is able to assist process of choosing the majors in SMA Negeri 1 Kampar Timur. Result of system test accuracy obtained is 93.18% of the 352 data tested. It indicates that Decision Support System can work successfully according to Simple Additive Weighting Method (SAW).Keywords : Decision Support Systems, Selection Majors Criteria, Simple Additive Weighting.
Pengaruh Konsentrasi Saccharomyces Cerevisiae Terhadap Biokonversi Pelepah Sawit Menjadi Bioetanol Meliana Dewi; Adrianto Ahmad; Sri Rezeki Muria
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

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

Abstract

Oil palm is one of the plantation commodities that have important role in economic activity in Indonesia. With a total area of 11.30 million hectares and oil palm plantations produce more than 75 million tons of palm oil waste per year and palm oil has a calorific value of 3350 kcal/kg, oil palm has the potential to contribute alternative energy from the resulting biomass. In addition to being utilized as an environmentally friendly renewable energy source, conversion of palm oil to bioethanol also helps to reduce untapped waste. Producing bioethanol from oil palm frond can be done through fermentation process. Factors that affect the fermentation process one of them is the number of cells of microorganisms. The microorganism used in this study is Saccharomyces cerevisiae. The purpose of this study was to determine the effect of Saccharomyces cerevisiae concentration on fermentation process on bioethanol produced and determine the best time of fermentation to bioethanol conversion from oil palm frond. The conversion of oil palm frond into bioethanol includes of delignification of oil palm frond by using KOH solution obtained from empty fruit bunches ash extract, purification of oil palm frond using 3% H2O2 solution, hydrolysis of cellulose using 1% H2SO4 with 100ºC for 60 minutes, and fermentation using Saccharomyces cerevisiae with different concentration of Saccharomyces cerevisiae 4 g/L, 6 g/L, 8 g/L, and 10 g/L. The maximum sugar concentration produced by the hydrolysis process was 117.55 g/L. The best bioethanol content was obtained at 3.29% (v/v) or 25.97 g/L at Saccharomyces cerevisiae 8 g/L concentration and 96 hours fermentation time.Keywords: Bioethanol, Fermentation, Oil Palm Frond, Saccharomyces cerevisiae
Optimasi Daya Pembangkit PV Kapasitas 10 KWP Berbasis Algoritma P&O dan Boost Converter Menggunakan Matlab Maryani Aritonang; Antonius Rajagukguk
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

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

Abstract

Using solar panels as a power plant can reduce the dependence of fuel oil. To work always on maximum power points, Photovoltaic (PV) requires optimization method. For this reason, the authors are interested in discussing the optimization method of the PV array model using Maximum Power Point Traking (MPPT) with the Perturbation & Observation (P & O) Algorithm and Boost Converter. In this case, PV capacity will be simulated on 10 kWp. That PV consists of 4 strings. Each strings consist of 10 PV modules. The output of PV modules will be forwarded to the Boost Converter circuit. Boost Converter want is controlled by P&O Algorithm. The voltage and current generated from the PV array modeling will be used by the P&O Algorithm as a reference. The function of P&O Algorithm is to track the Maximum Power Point (MPP) of the PV model. The result of tracking power by P&O Algorithm will be forwarded to Pulse Width Modulation (PWM) circuit as a duty cycle genrator. Duty cycle signal will be forwarded to the switching tool contained in the converter circuit. By that control system, PV model expected has maximum power according to the voltage. Based on the results of power test by 1000 W/m2 radiation, maximum power obtained is equal to 9967 Wp with 99.6 % efficiency at a voltage level of 400 volt. Therefore,it can be concluded that the design of the PV Array System using P&O Algorithm and the Boost Converter can work well.Keywords : Model PV Array, P&O Algorithm, Boost Converter, Optimization
Hidrolisis Daun Sawit Menjadi Glukosa Dengan Variasi Konsentrasi Asam Fosfat (H3PO4) Dan Rasio Substrat-Pelarut Boy Jansen Roberto Manik; Sri Rezeki Muria; Komalasari Komalasari
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

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

Abstract

Indonesia, especially Riau is a palm oil producing region. The increase of plantation and palm oil production is directly proportional to the amount of waste produced. Increasing waste is not offset by the treatment of such waste as oil palm leaves waste. Oil palm leaves is a lignocellulosic material which can be used to make products, one of them is glucose which can be used to make bioethanol and others. This research is aims to determine the best concentration of phosporic acid (H3PO4) and substrate-solvent ratio in the oil palm leaves hydrolysis to produce high glucose levels. The process of glucose production from oil palm leaves is carried out in various stages, namely preparation of raw materials, acid pretreatment process, analysis of raw materials and pretreatment, hydrolysis and results analysis. Acid pretreatmentwas carried out at temperature of 80ᴼC, within 60 minutes using sulfuric acid 0,5%. Hydrolysis is done by mixing sulfuric acid 60% and phosphoric acid in ratio 30:70, which is the concentration of phosphoric acid (60%,65% and 70%) and substrate ratio (product of pretreatment) with solvent (1:3 and 1:4) becomes the independent variable. Hydrolysis process is done by mixing solvent and substrate and left during 16 hours at room temperature, then added distilled water and cooked at 100 ᴼC during 2 hours. The result of this research obtained the best condition of oil palm leaves hydrolysis is the ratio of substrate-solvent 1:2 and phosporic acid 70% with a glucose level is 1977,8619 mg/L.Keywords : Glucose, hydrolysis, phosphoric acid, oil palm leaves, sulfuric acid
Pengaruh Interaksi Mikroalga Chlorella Sp. Dan Bakteri Bioprisma Terhadap Penurunan Kadar Nitrogen Total Pada Medium Limbah Cair Tahu Lely Rahmawati Saragih; Shinta Elystia; Sri Rezeki Muria
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

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

Abstract

Tofu liquid waste can be utilized by microalgae Chlorella sp. as a source of nutrition for its growth.Utilization of nutrients by Chlorella sp. can reduce total nitrogen of tofu liquid waste. The purposes of this research is to know the interaction between a complex microorganism contained in Bioprisma as a decomposer agent with the addition of photosynthetic microalgae Chlorella sp. as an oxygen producer in reducing total nitrogen loads of tofu liquid waste. The study conducted in batches with the bacteria addition treatment in 5 different levels, that is 0 (without the addition of bacteria), addition of bacteria as many as 0,25; 0,50; 0,75 and 1 (% v/v). The processing is carried out for 13 days with solar irradiation in the photobioreactor. The treatment with the addition of 1% was able to reduce total Nitrogen with 71,89% removal efficiency at the best-removing detention time, happened in days-13.Keywords: Chlorella sp., Bioprisma, Tofu Liquid Waste,Total Nitrogen, Contact Time.
Music Center Di Pekanbaru Dengan Pendekatan Arsitektur Ekspresionis Vicky Sonya; Pedia Aldy; Mira Dharma Susilawaty
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

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

Abstract

Music Center in Pekanbaru is a center that accommodates all activities in the field of music, especially modern music and traditional Malay music. The existence of Music Center in Pekanbaru is supported by high public interest in the art of music, this is reinforced by theexistence of several music schools and the many parents who direct their children to attend music lessons or music schools to hone their children's talents from an early age, in addition to frequent holding music concerts with high public enthusiasm for the concert. Music Centerhas the main function as a forum in educational, commercial and recreational activities for visitors, and in social activities as a meeting place for those who are already proficient inmusic with those who will learn about music. This method uses the Expressionist Architecture Approach which creates a building that expresses an emotion and can be felt by people whosee it, so that it not only provides facilities that can enrich one's expression, but also illustrates expressions in terms of architecture that creates a building that looks like a work of art. Expressionist architecture expressed the expression through the three physical elements of the building, namely facade, interior, floor plan and building mass. Through the concept Flow of Melody the building expresses music that is universal in nature with the flow that flows through the melody, so that not only as the main function of musical expressioncan also be seen through the architecture of the building.keywords : Pekanbaru, Music Center, Expressionist Architecture
Pengaruh Air Gambut Terhadap Asphalt Concrete - Binder Courses (AC-BC) Wardhana, Dheo; Malik, Alfian; Alwinda, Yosi
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

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

Abstract

The road pavement mixture occasionally submerged in peat water and rain water. This research aims to determine the characteristics changes of AC-BC asphalt mixture through Marshall test. The mixture used asphalt pen 60/70. The specimens or mixture were soaked in two types of liquid namely peat water and rain water. The characteristics such as stability, flow, Marshall Quotient (MQ), void in mix (VIM), and void in mineral aggregate (VMA) and residual strength index (RSI) were measured using Marshall instruments. The immersion of asphalt using peat water and rain water have an impact towards its Marshall characteristics, respectively on the value of stability, flow, and VIM. The test showed that the stability value decreases with increasing of immersion age. At the age of 3 and 4 days after immersion in peat water and rain water, both asphalt stability values do not meet specifications according to general specification of Bina Marga 2018 with minimum value of 800 kg. Those result also showed that the specimens have damage faster than usual and reducing the strength of asphalt pavement. This loss of mixture strength leads to the decreased ability of the AC-BC mixture to bear the traffic load over the time then make it become plastic fatigue (flow). Then the research indicated that the value of the Residual Strength Index (RSI) gradually decreased since early ages. At the age of 2, 3, and 4 days of immersion of speciments showed in peat water, the value of RSI do not meet the specifications (more than 90%).Keywords: Peat water, Rain water, AC - BC

Page 233 of 315 | Total Record : 3145

 231   232   233   234   235 

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