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INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Engineering
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Articles 3,145 Documents
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Mini Review : Metode Floating Treatment Wetland Untuk Pengolahan Air Limbah Penatu Dwiegi Safitri Febriani; Lita Darmayanti; Yohanna Lilis Handayani
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

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Abstract

The existence of laundry has a positive impact on the community but actually has a negative impact on the environment. Chemical compounds contained in laundry water such as surfactants, can trigger eutrophication in water bodies. If this is allowed continuously will cause water pollution problems. Floating Treatment Wetland (FTW) comes as an option that can be used to decompose water pollutants by utilizing macrophyte plants. This research aims to describe the application of FTW as one of the potential methods for laundry wastewater treatment because it is minimally costly, environmentally friendly, and sustainable.Keywords : Laundry wastewater, FTW, water pollution.
Pengaruh Variasi Komposisi Bahan Baku Pembuatan Pulp terhadap Kualitas Dan Rendemen Pulp Kraft Erwan Handoko; Zulfansyah Zulfansyah; Hari Rionaldo; Dimas DP Nugroho
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

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Abstract

The increasing demand of pulp in the world requires sufficient availability of raw materials. To fulfill the raw material supply, it can be established through development of industrial plantations (HTI). Acacia sp and Eucalyptus sp are the types of wood that are prioritized for development in industrial plantations because these species are fast growing species, high timber production, and do not require high living requirements. The study was conducted on a mixture of Acacia crassicarpa and Eucalyptus raw materials with the compositions are 75% Acacia crassicarpa : 25% Eucalyptus (AC:EH-75:25), 50% Acacia crassicarpa : 50% Eucalyptus (AC:EH-50:50)and 25% Acacia crassicarpa :75% Eucalyptus (AC:EH-25:75). Pulping is done by means of a kraft process. The best cooking conditions with kappa number target 17 ± 1 were obtained in the variety of raw materials for 25% Acacia crassicarpa and 75% Eucalyptus (AC:EH-25:75) with active alkali concentration 18%, temperature 165 oC, ratio 1: 4 and H factor 800 with screen pulp yield 50,52%, brightness 36,96% ISO, viscosity 1045 mL/g, and productivity 248,6 kg/m3 where in this variation the composition of the wood used contains more Eucalyptus than Acacia crassicarpa. Eucalyptus wood has a higher density resulting in a higher productivity. Keywords : active alkali, h factor, brightness, viscosity, density
Pengujian Prestasi Pembangkit Listrik Tenaga Piko Hidro (PLTPH) Jenis Kincir Air Tipe Overshot Menggunakan Saluran Irigasi
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

Water energy is a natural resource that is owned by the Indonesian state and electricity is an essential requirement for human life. Water Energy is an alternative energy that can be converted into electrical energy and pollution-free in order to meet community needs. One type of renewable energy is a small-scale hydropower is often called Power pikohidro (PLTPH). In this study include the design of pico hydro power plant types overshot waterwheel types by utilizing the water resources contained in the irrigation area around the reservoir University of Riau. The design is based on the water flow of 0.02 m3/s and water level of 0.4 m.,based on design method was produced the diameter of waterwheel, the number and size of the blades as well as the sizes of penstock. The outside diameter and inside of wheel were 0.6 m and 0,5 m . number of blades were 18 pieces with an area of 0,01 m2, penstock sized of 0.01 m wide and 0.01 m, shaft have 19 mm of the diameter, and 1:4 the ratio of the transmission system. Variations discharge 0,005 m3/s, 0.0056 m3/s, 0.0059 m3/s, 0.0065 m3/s. Maximum power output was generated by the waterwheel of 17,68 Watt and efficiency of 38.84%.Keywords: PLTPH, Design Waterwheel overshot, Efficiency
Klasifikasi Jenis Mangga Berdasarkan Fitur Bentuk Dan Warna Dengan Menggunakan Metode K-Nearest Neighbor
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

Mango is one of the fruits that popular in Indonesia. Mango has many types so that sometime people can make mistake in predicting the mango type due to similar shape and color, features among types of mango, especially Mango Arum Manis with Mango Indramayu. With an advanced technology such as MangoClassifier, predicting the type of mango can be distinguished automatically by using existing applications and K-Nearest Neighbor Method. This research aims to implement the K-Nearest Neighbor Method to detect mango types then evaluate how much the accuracy of the MangoClassifier Application is, so that it can be compared with the accuracy of other methods. This application is supported by camera equipment, matlab R2013a software, acquisition booth and K-Nearest Neighbor Method, calculates the distance between data with Euclidean distance. The acquisition booth is used to take a picture of mango object so the program will be easily to distinguish between background and object the picture. Data processing is begun with mango picture retrieval and then pre-processing the picture to get features. The used features are four, length and width from cropped object in the picture. Besides it, color and roundness of object are other features that also must be considered. This application detects four types of mango including Mango Arum Manis, Mango Indramayu, Mango Lokmay and Mango Gedong using 200 training data and 120 testing data. Accuracy obtained by this application is 92.5% so that this application is categorized as suitable to be used.Keywords : K-Nearest Neighbor, Jarak Euclidean, Matlab R2013a.
Studi Pemanfaatan Abu Sekam Padi (ASP) Sebagai Campuran Batako
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

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Abstract

Rice husk ash is a pozzolan material which can be used as an additive in the manufacture of concrete, so that it potentially reduces the amount of cement in the material. This research aimed to determine the effect of rice husk ash addition on quality of brick making. The composition of rice husk ash added to the material was 10, 20, and 30% of the weight of cement used. Quality analysis was conducted on compressive strength, water absorption.Keywords: Compressive Strengt, Rice Husk Ash, and Water Absorption.
Pengaruh Penggunaan Base Isolator System Terhadap Respons Struktur Bangunan Dengan Analisis Time History
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

Indonesia is prone to seismic hazard load due to its location situated on a meeting point of four tectonic plates. Therefore design of the building is necessary to include the earthquake load in order to minimize the damage of the buildings and also to avoid casualties resulted from collapsed structures. Several methods had been developed to eliminate the risk affected by the earthquakeload to the buildings. One of them is the use of seismic isolator. This research aimed to identify the responses of the building structure with and without base isolator. Responses of the structure were gained from time history analysis using finite element software conducted on the 25-storeyreinforced concrete building. The selected building was located in an area with high earthquake load intensity on sumatra island namely Banda Aceh, Padang and Bengkulu and constructed onlayer of soil with moderate condition. At one of the building analyzed in this research was provided with high damping rubber bearing (HDRB) base isolator. This base isolator was modeled as link element. This element connected the foundation and the upper structure. Then the building was loaded with the Cape Mendocino earthquake loads that were modified and adjusted to complywith SNI 03-1726-2012 building code. The results showed that the reduction of the velocity and acceleration of the building with HDRB ranged from 50% - 52% and 22% - 23,5%, respectively,compared to that of the building without HDRB. Thus the study is expected useful for engineers of high rise buildings in planning a stable structure in receiving earthquake loading.Thus the studyis expected useful for designers of high rise buildings in planning a stable structure in receiving earthquake loading.Keywords: base isolator, earthquake load, high damping rubber bearing, structure responses, time history analysis.
Kuat Tekan Mortar OPC Dan Kerang Lokan Di Lingkungan Air Laut
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

The compressive strength of concrete is defined as the ability of concrete to accept compressive force per unit area. The compressive strength is very important to study because it governs the suitable material composition needed for concrete mix. Damage that occurs  in concrete placed on corrosive environmet sea water, was trigged by salt that diffuse the concrete’s pore. After that, corrosion will occur cause weathering of the concrete reinforcement and the release of the material. The content of CaO in the lokan shells makes the shells have calcium binding on concrete or mortar mixture. This study aims to examine the compressive strength of Ordinary Portland Cement (OPC) mortar and  mortar with lokan seashells immersed in seawater environments. Powder from lokan sea shells was extracted  that was burned at high temperatured and filtered using sieve no 200.  The composition of powder content of lokan sea shell was 0 %, 2.5%, 5%, 7,5% and  10% of the weight of cement.   The specimen was in 5 x 5 x 5 cm cubes and cured on fresh water for 28 days. Later, these specimen were immersed in sea water environment for 3, 7 and 28 days. The results showed that the compressive strength of OPC mortar with lokan sea shells was higher than the compressive strength of OPC mortar. For the case of OPC mortar containing 10% of lokan sea shells, the addition of lokan sea shells powder casted increase compressive strength up to 6.5%   Keywords: Lokan seashell powder, compressive strength, OPC
Analisis Protokol Routing Aomdv Pada Vehicular Ad Hoc Network Di Pekanbaru
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

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Abstract

The increasing number of vehicles per year causes problems not only pollution but also congestion and traffic accident which continue to increase every year. So we need a system that can help reducecongestion and accidents such as Intelligent Transportation System (ITS). With the increase in information technology, especially computer networks and the internet, researchers in this field try togive their contribution in realizing safety and comfort in driving. One popular research topic in the computer network and automotive industry is the vehicular ad-hoc network (VANET). The purpose ofthe VANET research is to develop a communication system on vehicles that enabling fast and efficient data exchange so that it can be used as a traffic information system. In this study, the testing of theAOMDV (Ad-hoc on Demand Multipath Distance Vector) routing protocol was used by using a scenario of changing the number of nodes and the speed of the nodes. The method used in this study isa simulation using SUMO and NS-2 and measured using the parameters of throughput, end to end delay and packet loss. From the simulation results, testing the change scenario the number of nodes inthe AOMDV protocol has an average throughput value of 319.9375 kbps, end-to-end delay 0.159667 s and packet loss 8.0831%.Keywords: VANET, AOMDV, NS-2, SUMO
Peningkatan Kuat Tekan Bebas (UCS) Tanah Lempung (CH) Terhadap Penambahan Semen Dan Limbah Fly Ash
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

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Abstract

High plasticity clay is categorized as soft soil which has low strength and bearing capacity, high compressibility and large shrinkage, so that to increase strength and improve bearing capacity it is necessary to make stabilization efforts on the soil. The stabilization effort carried out in this study was mixing of additives in the form of fly ash and cement. The method used was a laboratory experimental method by testing UCS samples. The sample mix that has been made was varied based on curing days, namely 0 days, 7 days and 28 days with variations of cement mixture 3%, 5% and a mixture of fly ash 5%, 10%, and 15%. A sample naming method is also provided to make it easier to summarize the results of each planned test variation. Based on the test results, the addition of cement and fly ash increases the value of free compressive strength (Cu) and compressive strength (qu). The highest increase in UCS occurred in soil with 5% cement and 15% fly ash with 28 days curing. The increase in qu in the UCS sample is the largest in the variation of the sample T0-S5-FA15-C28 with a value of 218.41 kPa, this increase is 89.91% when compared with the qu TA value of 22.04 kPa. Keywords: Cement, Fly Ash, UCS.
Metode Convolutional Neural Network Dalam Klasifikasi Citra Tiga Tokoh Wayang Pandawa
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

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Abstract

Puppet Show is a traditional Indonesian drama, where Pandawa is one of the stories that is often shown. Pandawa is the story about five siblings who received unfair treatment from his ancle and cousin. When they succeeded in defeating his cousin, they still honored his uncle as a family. Each story in a Puppet Show has a very useful message in life, such as the story of Pandawa. Although many times attempted to be destroyed by another family, they never gave up. Until finally they can have what they are supposed to belong to. Nowadays, Puppet Show is increasingly forgotten because of technology development. This research aims to help preserve Puppet Show, by creating programs that can help in identifying puppet figures using machine learning. Machine learning is a learning process that learns data based on historical data. The Convolutional Neural Network (CNN) is a method in machine learning that can be used to create training models to classify data consisting of more than two classes. The characters to be classified in this research are Yudhistira, Bima and Arjuna. The Total data used is 600 which is 100 × 100. By using Softmax activation function for classifying its class, the accuracy obtained is 96,67%. Keywords: Convolution Neural Network, Classification, Pandawa, Puppet Show

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