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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
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Optimalisasi Peletakan Posisi Access Point Pada Jaringan WI-FI Menggunakan Metode Simple Random Sampling Dan Coverage Visualization Di Fakultas Teknik Universitas Riau Ryant Pratama; Linna Oktaviana Sari
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

It require good technique of access point location placement to obtain good level signal. Proper placement of access point can determine the range of coverage area obtained by using parameter from access point. The purpose of this study is to do optimization of access point location placement to reduce blank spot in Engineering Faculty of Universitas Riau. Current scope of Wi-Fi signal coverage area is still not enough to cover all areas in Engineering Faculty of Universitas Riau. There are some adjacent access point locations that needed to optimization to obtain good quality signal and better access point location can be obtained. inSSIDer application is used to identify the Wi-Fi signal strength, Ekahau HeatMapper application is used to identify coverage area, and Ekahau Site Survey application is used to implement optimization. Based on calculation, measurement, and implementation result by using Simple Random Sampling Method can be obtained dominant result of signal strength is ≥-45dBm. It can be determined that causative factors of less optimal from coverage area scope is not only by building construction, but also the placement between access points can also affect reobtained coverage area.Keywords : Access Point, Optimization, Coverage Area, Simple Random Sampling Method.
Produksi Bioetanol Dari Sari Kulit Nenas Menggunakan Yeast Saccharomyces Cerevisiae Dengan Variasi Penambahan Tween 80 Dan Sumber Nitrogen Sheilviana Angela; Sri Rezeki Muria; Elvi Yenie
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

One material that has potential to be used as raw material for bioethanol is the pineapple peel. Pineapple peel from the pineapple is one of the biggest agricultural waste in Indonesia, particulary in the area of Riau. Pineapple peel can be used as raw material for bioethanol production because contain much fibers, carbohydrates and glucose. This study aimed to obtain the highest amount of bioethanol from fermented juice pineapple peel using the yeast Saccharomyces cerevisiae by varying the concentration of tween 80 and comparing the nitrogen sources such as peptone and yeast extract and fermentation time is 24, 48 , 72, 96, and 120 hours. Measurement of bioethanol content using alcoholmeter. From the research results, obtained the highest bioethanol content of 9% v/v or 71,04 mg/ml in the additions at 20 ml tween 80 and a nitrogen source such as peptone and the fermentation time 96 hours.Keywords: Bioethanol, Pineapple Peel, Pepton, Saccharomyces cerevisiae, Tween 80, Yeast Extract
Kantor Sewa Di Pekanbaru Dengan Pendekatan Pencahayaan Alami Nasution, Fajar Rizki; Aldy, Pedia; Novan, Andre
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

Office is one of fundamental basic when starting a company. But, due to its high cost of building a new office, many consider to rent, wether its a small space, or even a whole building. In adeveloping city like Pekanbaru, to build a new building must follow the aspect of sustainable design, such as to consider building a high-rise instead of a multi-storey building. Talk about ahigh-rise building, expecially one designed for office, the use of electricity is inevitably high. For example, the use for lighting, cooling system, and the use of all other office equipment (computer, fotocopy machine, etc) which is very active during the worktime. But, there’s actually a solution to this, as office mostly active during the day. And that is the very reason to consider the use of infinite source of energy during the day, the daylight itself. The designing of natural lighting strategy basedon the elements of : building orientation, toplighting, sidelighting, and shading system. The application of natural lighting concept on this building will reduce the cost of electricity andbecome an eco-friendly building.Keywords : Office, Rental Office, Natural Lighting
Pembuatan Briket Dari Batang Sawit Menggunakan Gliserol Produk Samping Biodiesel Sebagai Matrix Aswie, Viqha; Helwani, Zuchra; Fatra, Warman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
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Abstract

Palm oil waste is one of the potential biomass to be converted into briquettes. The size of the particles, the composition of the matrix crude glycerol on palm oil charcoal and the pressing pressure has an effect on the quality of the briquettes produced. This study aims to determine the effect of particle size, composition of matrix crude glycerol on palm oil, and pressing pressure in briquettes produced from palm oil, and analyze the effect of these variables using the analysis of Respond Surface Methodology (RSM). The palm stem is first carried out by a carbonization process to form palm oil charcoal. Palm oil charcoal is separated by 60, 80, and 100 mesh sieve and mixed with crude glycerol with the composition of charcoal to crude glycerol 60:40, 70:30, and 80:20. The samples that have been mixed are then densified at 100, 110 and 120 kg / cm2. The design of the experiment trip was determined by Central Composite Design in Design Expert 7.0.0 software. The resulting briquette products were analyzed in the form of heat value analysis, compressive strength analysis, and proximate analysis. The results showed that the highest calorific value was obtained at 28,089.6 kJ / kg in 80 mesh particle size, 53:47 charcoal matrix composition, and pressing pressure 110 bar. While the highest compressive strength value was 7,526 kg / cm2 at 10 mesh particle size, matrix composition of 80:20 charcoal, and pressing pressure 120 bar. Palm oil briquettes have met the standard heat value of briquettes (min. 21,000 kJ / kg) based on SNI.Keywords : briquettes, crude glycerol, matrix, palm prees
Sintesis Hidroksiapatit Dari Precipitated Calcium Carbonate (PCC) Terumbu Karang Melalui Proses Presipitas Dengan Variasi PH Dan Suhu Sintering Muhammad Alfin Khairullah; Yelmida Yelmida; Komalasari Komalasari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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Abstract

Hydroxyapatite is a bioceramic acid which is widely used as a bone and tooth graft, catalyst and adsorbent. Hydroxyapatite is a calcium phosphate compound that can be synthesized from natural ingredients with calcium content such as coral reefs. Coral reefs are marine biota with a CaCO3 content of 98.8%. This study aims to synthesize hydroxyapatite through the formation of Precipitated Calcium Carbonate (PCC) from coral reefs. The research procedure begins with the calcination process of coral reefs to form CaO which is then made into PCC using the carbonation method. PCC as a source of calcium is synthesized into hydroxyapatite using the precipitation process with variations in pH (9 and 11) and sintering temperature (without sintering, 400oC, 500oC, 600oC). The synthesized hydroxyapatite was analyzed by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The results of the XRD analysis showed the formation of hydroxyapatite compounds from the angle 2θ which corresponds to the data (ICDD 01-072-1243). Hydroxyapatite synthesized at pH 11 and sintering temperature of 600oC gave the best results with hexagonal crystal structure, the value of the degree of crystallinity was 89,632 and the crystal size was 18,0623. Keywords: degree of crystallinity, PCC, pH, sintering temperature
Pengaruh Penggunaan Pasir Menggala Kabupaten Rokan Hilir Pada Campuran Laston Lapis Aus Eka Candra Safrizal; Sri Djuniati; Yosi Alwinda
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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Menggala sand is one of the natural sand obtained from the mound excavation located in the Province of Riau, and if the terms of the costs of using natural sand is certainly cheaper than the fine aggregates quarry result, it is not required additional costs for the fragmentation. Use of Menggala sand still limited and not optimal so that there should be research on the use Menggala sand as fine aggregate against asphalt concrete wearing course (AC-WC) with reference to the Specifications of Bina Marga 2010 3rd Revision. The purpose of this study was to determine the characteristics (properties) of natural Menggala sand whether it meets the requirements to be used as a mixture of AC-WC and influence the use of Menggala sand on performance or quality AC-WC through an examination of the characteristics of Marshall. Specifications of Bina Marga 2010 3rd Revision restricting the use of natural sand 15% of the total weight of the mixture of aggregate. Given the low cost of natural sand use in this study tested levels of sand with a variation of 0%, 5%, 10%, 15% and 20%. The results showed that a mixture of AC-WC with Menggala sand as fine aggregate eligible VMA (voids in mineral aggregate), VIM (voids in the mix), VFA (voids filled with asphalt), stability, Flow and Index of Retained Strength (IRS ) determined by the Specifications of Bina Marga 2010 3rd Revision to 20% sand content with optimum bitumen respectively - were based on variations in the sand content of 6.3%, 6.33%, 6.15%, 6.1% and 5.925%.Keywords: Menggala sand, Asphalt Concrete Wearing Course (AC-WC), Spesification of Bina Marga 2010, and Marshall characteristic
Dasar-Dasar Fotografi Sebebagai Pembentuk Arsitektur Pada Perancangan Graha Fotografi Rinjani, Frist Intan; Faisal, Gun; Firzal, Yohannes
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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Graha photography serves as a mediums to accommodate photography activities, but Pekanbaru City does not have a container that is devoted to that field, such as graha photography.Meanwhile, the development of photography is increasing from day to day, based on the fans and photography community. Some photography lovers learn about photography by self-taught, thus requiring individual containers to learn and develop. This is why we want to make graha photography in Pekanbaru City. Graha photography design is done by combining the definition of photography as a light of print and made the concept of design. Light print on the design of graha photography include the form of mass composition of the building as a transformation of the form that begins from the direction of light comes directed to the field of reflection to other fields until there are several times the reflection, such as the light of the digital single lens reflex camera. Meanwhile, the basic parts of photography composition, angle and moment apply to other building parts such as facades, landscaping and interior buildings.Keywords:, Light print, Photography, Reflection
Pondok Pesantren Modern Di Pekanbaru Dengan Pendekatan Arsitektur Tropis Wahyu Hidayat; Gun Faisal
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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Rapid development of Pekanbaru City requires human resources that have certain quality. In order to form a well-developed human resources that contain good intellectual and spiritual values,it requires a well-developed educational system as well. A system where both of general and religion education given to the students can be found in modern islamic boarding school. Modernislamic boarding school is a place for preparing its students to be a well-educated person who can be an islamic leader through society, education and good deeds. The transformation method was used in the design, was tropical architectural approach. Modern islamic boarding school was designed using the concept of bee hive. The bee hive concept was applied through thetransformation using the closure of analogical of the shape and characteristic of the bee hive in masses forming and landscape pattern design of the school. The Tropical Architectural principlewas applied in the design of the modern islamic boarding school through the building's mass; the orientation, vegetation, opening, roof types, and colours. The tropical building principles wereapplied so that the school's building can be adapted with tropical areas.Keyword: Modern Islamic Boarding School, Pekanbaru, Tropical Architecture
Produksi Biodiesel Dari Minyak Nyamplung Menggunakan Katalis Lempung; Pengaruh Rasio Mol Minyak : Metanol Dan Konsentrasi Aktivasi Katalis Husna, Zakiyatul; Bahri, Syaiful; Khairat, Khairat
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
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Biodiesel is one of alternative energy to replace fossil fuels from vegetable oil. The aims of this research were to produce biodiesel from callophylum oil using heterogen catalyst clay, determine the characteristics of the activated clay catalyst, determine the optimal conditions of making biodiesel from callophylum oil, determine the physical and chemical properties of biodiesel produced,comparing the characteristics of physics biodiesel synthesized by standards SNI 1782-2015.Catalyst is made by grinding the clay palas to a size of -100 + 200 mesh. Clay was activated using H2SO4 solution with variation of concentrations 0,5 N, 1 N and 2 N. The mixture is filtered using a vacuum pump and calcined at 300ºC for 3 hours. Production of biodiesel is carried out through two stages: esterification and trans-esterification. Before esterification, degumming process was done to remove impurities and gum contained in the oil. While in the trans-esterification process, variation in the mole ratio of oil : methanol is 1:6, 1:9 and 1:12, callophylum oil sample weight 50 gram and 1% by weight of clay catalyst added to the to trans-esterification reactor, reaction lasted for 120 minutes at 60ºC with agitation speed 400 rpm. This research resulted in the largest biodiesel yield on the use of the activation of the acid concentration 2N variation mole ratio of oil : methanol 1:9 is 86.2 %. The Characteristics of the catalyst that has a surface area and ratio of Si/Al large enough that 25,74 and 37,64 (m2/g) with biodiesel produced almost in accordance with established standards (SNI 04-1782-2015). Keywords: biodiesel, callophylum oil, palas clay, transesterification
Pengaruh Rasio Mol Minyak : Metanol Terhadap Sintesis Biodiesel Dari CPO (Crude Palm Oil) Menggunakan Katalis La/ZnO Yumna, Nada Ibtihal; Bahri, Syaiful; Utama, Panca Setia
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
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Abstract

The synthesis of biodiesel is affected by several factors, one of them is the mole ratio of oil to methanol. Producing biodiesel need excess amount of methanol to increase biodiesel yield. The effect of mole ratio of oil to methanol of 1:9; 1:12; 1:18 and the amount of La impregted to ZnO of 1%; 2%; 3%; 6% to the biodiesel yield were studied. The impregnation of La into ZnO was done by maxing La2O3 and ZnO, and then the calcination process was applied for 6 hours at 500 oC using N2 gas. The oxidation process was done for 2 hours at 400 oC using O2 gas. The reduction process was done for 2 hours at 400oC using H2 gas in order to reduce oxygen in La2O3. The esterfication process was done in 1000 cm3 stirred glass reactor, the operating conditions were temperature of 60 oC and time of 60 minutes. After that, the transesterification process was done using the same equipment. The operating conditions were temperature of 60 oC and time of 90 minutes, stirring speed of 400 RPM, and amount of catalyst was 1% (w/w) oil. The highest biodiesel yield of 90.937 % was obtained at the mole ratio of oil to methanol 1:18 and amount of La impregted into ZnO of 6 %. Physical characteristic of biodiesel obtained were density of 881 kg/m3, kinematic viscosity of 3.53 mm2/s, acid number of 0.423 mg-KOH/g biodiesel and flash point of 148 oC which is in accordance to the standard of Indonesian Biodiesel (SNI 04-7128-2015).Keywords: biodiesel, CPO, La/ZnO catalyst, transesterification

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