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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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Perbandingan Analsa Kapasitas Sambungan Balok - Kolom Konvensional Dan Pracetak Sistem U-Shell (Studi Kasus Gedung A Rumah Sakit Pendidikan Universitas Riau) Nasrullah Nasrullah; Zulfikar Djauhari; Iskandar Romey Sitompul
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Precast concrete construction have a lot of excellence compared to conventional system. this system excellence, for example well guaranted quality, produce quickly and mass, development which quickly, natty and environmental friendliness with good product quality. Precast system which have been proven by its excellence is certifiable and become solution to replace conventional system. That is seen to the number of building in Pekanbaru used precast system. One other newest is building University of Riau Educational Hospital. This hospital use precast concrete type U-Shell. The part that becoming attention from precast system is beam- column connections. Beam-column connections represent very important part in transferring forces precast element jointed. When is not planned better hence the connection can collapse of precast structure, so that can alter hierarchy which wish reached structure. This research have compared to momen and shear capacities between conventional beam- column connection and precast U-Shell. The result that obtained is difference of maximum confined concrete stress at corner connection (A), eksterior (B) and the interior (C) that is equal to 49,98 Mpa, 50,41 Mpa and 51,31 Mpa. Total of confined moment capacities is equal to A = 587,38 kN.m, B = 632,83 kN.m and C = 745,60 kN.m. The difference of maximum concrete stress and moment capacities of connection resulted from difference of configuraton of longitudinal steel and difference number of beam that connecting A, B And C that is 2, 3 and 4 of beams. Keywords : precast, u-shell, conventional, confined, connection
Evaluasi Kapasitas Shelter Evakuasi Untuk Bencana Tsunami Di Kota Padang Berbasis Sistem Imformasi Geografis (SIG) Ahmad Ade Kurniawan; Sigit Sutikno; Rinaldi Rinaldi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Padang city is prone to earthquakes and tsunamis because it lies at the confluence of two Indian and Asian plates . To prepare for the possibility of tsunami, some agencies have made evacuation planning . Marine and Fisheries Department and Tsunami Alert Community plan the building that can be used as an evacuation shelter in Padang . Marine and Fisheries Department has planed for as many as 152 buildings of shelters and Tsunami Alert Community has planed for as many as 93 buildings. This study evaluated the capacity of shelters that planned by Marine and Fisheries Department and Tsunami Alert Community  based on geographic information system with respect to the level of accessibility and capacity of shelters. Used to evaluate the level of accessibility of service area concept . Service area in this study means that refugees who are in the area has enough time to reach shelter before the tsunami . Used for the analysis of service area facilities Extension Network Analist contained in ArcGIS software . Assumption which used is if the speed of  the evacuation of people walk or run is 3.6 km/hour, the tsunami wave propagation time is 33 minutes and each resident requires an area of 1.65 m2 . In this study concluded that the capacity of the shelter which planned by  Marine and Fisheries Department and Tsunami Alert Community  is insufficient to accommodate prospective refugees in Padang . Based on data from the latest shelter building and the combination of the number of buildings that  planned by Marine and Fisheries Department and Tsunami Alert Community only able to accommodate 75 % of the population residing in the submergence area of the tsunami. Keywords: tsunami, shelter evacuation, geographic information system
Analisa Kelayakan Ekonomi Rumah Susun Sederhana Pekanabru Arianti, Yesi; Taufik, Hendra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Flat-house is one solution to fulfill the requirement of houses.  It  will increase  with the increasing of human populations. The development of simple flat-house usually purposed for peoples with medium to low profit. Hire  price must be considering of willingness to pay and ability to pay of that peoples.  Purpose of this research is to investigate either proper or not the flat-house  project built based on economic analysis so that it would be resulted a recommendation to the related institution. Indicators of proper investment were NPV (Net Present Value), BCR (Benefit Cost Ratio), IRR (Internal Rate of Retrun), BEP (Break Even Point) and sensitivity analysis.  Calculation result of investment cost in this research which used method of approximate approach was Rp 22.315.717.450. The analysis result of proper investment for all parameter showed that the investment was proper to be continued because in the level of interest used was about 5,75% of proper investment, NPV value was positive, BCR value was above 1, IRR value was more than 5,75% (loading interest investment), and BEP was less than 25 years (project time).   Key words: Analysis of proper investment, analysis of sensitivity, BCR, BEP, IRR, NPV
Analisa Kelayakan Tarif Pdam Kota Dumai Berdasarkan Pengembalian Biaya penuh (Full Cost Recovery) Proyek Dewi Herlina; Ari Sandhyavitri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Dumai, one of the largest city in Riau Province,  has only served 6% of its total population’s needs of water supply, which mean there are only about 16.000 of  280.000 citizen in this city which have been served by PDAM with 80 L/s supplying ability and just 50% efficiency. Therefore, improvements of water supply should be top priority, which means it needs a relatively big amounts of investment based on the feasibility study. In this case, to obtain a proportional investment it needs to analyze the Full Cost Recovery of this project. The ultimate goal of this research is to analyze the Economic Feasibility for PDAM of Dumai city for 25 years later with a turnover provisions at the 20th year. The feasibility study in this research is based on economic analysis with two alternatives; water treatment with 80 L/s capacity up to projection age and raising to160 L/s capacity at the 5th  year. This economic analysis uses five indicators; Net Present Value (NPV) of benefit and cost flow,Internal Rate of Return (IRR), Benefit Cost Ratio (BCR), Break Event Point (BEP) and sensitivity analysis, whereas the calculation in this study using the approximate estimation. The calculation in this research uses 12% of interest rate and 6% of inflation, and  results Rp. 61.098.871.064,- of investments for an 80 L/s capacity water treatment with price Rp. 7.000,-/m3  for a household and Rp 9.000,-/m3 for an industrial consumption with Rp. 4.444.807.908 , - of NPV with 1,135 BCR and 16,829 % IRR. As for the capacity of 160 l / sec obtained an investment of Rp . 99,657,097,694 , - with a tariff of Rp . 5.700 , - for Household and Rp . 8.000 , - for an industrial consumption with  Rp6.670.266.335 , - of NPV with 1,122 BCR and 16,433 % IRR with investment feasibility analysis above shows that all the parameters are well worth to be invested.   Keywords : Investment Feasibility Analysis , Investment Feasibility indicators , NPV , BCR , IRR , BEP , Sensitivity Analysis .
Model Prediksi Liku Kalibrasi Menggunakan Pendekatan Jaringan Saraf Tiruan (ZST) (Studi Kasus : Sub DAS Siak Hulu) Mahyudin, Mahyudin; Suprayogi, Imam; Trimaijon, Trimaijon
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The purpose of this research is to predict the rating curve equation on the site Pantai Cermin Sub-watershed Siak Hulu Siak River in 2009. This is based due to the unavailability of rating curve equation on the site Pantai Cermin Sub-watershed Siak Hulu in 2009 until 2012 so hopefully this research can be used as an alternative method for determining the rating curve equation turns more quickly and accurately. This research was conducted using an artificial neural network approach to the backpropagation algorithm. Configuration of network model used is the single input and single output. This approach uses auxiliary program that is Matlab 7.7.0.471 (R2008b). Results of this research showed that the artificial neural network model results of training, testing and validation have a very good level of correlation with the value of R 0.92996, 0.94469 and 0.97513. The rating curve equation for 2009 is Q = 22.93 x H1.265 with the level of correlation R = 0.9975. Keywords: rating curve, artificial neural network, backpropagation, siak hulu.
Estimasi Biaya Pemeliharaan Bangunan Berdasarkan Pedoman Pemeliharaan Dan Perawatan Bangunan Gedung (Permen Nomor : 24/PRT/M/2008) (Studi Kasus Bangunan Masjid Islamic Center Bangkinang) Adriansyah Adriansyah; Rian Trikomara
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Building maintenance consistently has become a requirement that must be fulfilled, particularly for buildings that functioned in the public interest including the Islamic Centre Mosque Bangkinang . Maintenancing and monitoring continuously of the condition of the building components will greatly help to reduce the large financing and can reduce the rate of severe damage . Building maintenance requires a proper maintenance manual in accordance with existing regulations (No : 24/prt/m/2008 ) which can then provide an overview of the estimated costs necessary in the maintenance of the building . Based on the analysis using the methods in approximate estimate , the percentage obtained 1.69%. While the cost of necessary repairs is Rp.337.507.095 , 29 . But in overall, the condition of the building Masjid Islamic Centre Bangkinang is still categorized in slightly damaged. As for the cost of maintenance per-year amounted to Rp884, 691,280.45 which is predicted to be increased every year.  Keywords : repair costs , maintenance costs , estimated price forecasts ( approximate  estimate) , the extent of damage.
Pembuatan Sirup Glukosa Dari Tepung Sagu Yang Dihidrolisis Dengan Asam Klorida E, Sutanto; Yusnimar, Yusnimar; E, Yenie
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Sago is one of carbohydrates potential resource for foods and raw materials in industries. Sago can be treated to a glucose syrup by using HCl 0,5N as a catalyst. The purpose of this research is make glucose syrup with the process of hydrolysis of sago flour and determining the influence of temperature, volume the addition of acid and hydrolysis time on reducing sugar concentration of syrup produced. In order to get the highest of glucose concentration in these syrup, in this research sago hydrolysis process have been done under variation of the volume acid (10, 15 and 20 ml), the hydrolysis temperatures (105, 115 and 125 oC) and the hydrolysis time (15, 30 and 45 minutes).  The glucose syrup were analyzed, such as water content by SNI 08-7070-2005 and glucose content by the Nelson-Somogyi method. Based on the result, the highest of glucose content in this syrup is 67.7% under condition the addition of 0.5 N HCl volume by 15 ml, hydrolysis time 30 minutes and temperature of 125 oC. The resulting glucose syrup meets the standard based on SNI 01-2978-1992 namely glucose concentration of more than 30% and a water content of less than 20%.  Keywords: Glucose, Glucose Syrup, Hydrolysis, Sago
Pengaruh Volume Inokulum Pada Produksi Bioetanol Dari Limbah Kulit Nanas Menggunakan Zymomonas Mobilis Dengan Metode Solid State Fermentation (SSF) Ikhsan ' Fajrin; Said Zul Amraini; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
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Increasing of world energy consumption and depleted of availability fossil fuel caused the development of energy goes thru renewable fuel and environment-friendly. Waste of agriculture such as pineapple peel can be utilized as raw material to produce bioethanol through fermentation. The aim of this research  are to know the process of bioethanol production through solid state fermentation (SSF) from pineapple peel and to determine the yield of bioethanol produced using Zymomonas mobilis with various inoculum volume  8, 9, 10, 11, and 12 % and various fermentation time 6, 12, 18, 24, 30 and 36 hours. Fermentation process conducted using Zymomonas mobilis because it has several advantages such as resistant to high concentration of ethanol,more tolerant to temperature and low pH. The result shows that the higher inoculum volume that inoculated to substrate the higher ethanol produced. The highest yield of bioethanol is 21%v at inoculum volume 10%. The optimum fermentation time obtained is 24 hours to all various inoculum volume Keyword : Bioetanol; Fermentasi; Kulit Nanas; Solid State Fermentation (SSF); Zymomonas Mobilis
Hidrolisis Hemiselulosa Batang jagung Dengan Proses Organosolv menggunakan Pelarut Asam Formiat Desi Ivo Andri Ari; Zuchra Helwani; Zulfansyah Zulfansyah; Hari Rionaldo
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
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Abstract

Corn stalk is solid waste of agricultural which is not optimally utilized. Corn stalk used for pulp and paper raw materials and also used for feeding animal. The aim of hemicellulose hydrolysis from corn stalk is to study the possibility of utilization corn stalks as raw material for chemical industry, to know the behaviour and to obtain the kinetics pattern of hemicellulose hydrolysis from corn stalk in organosolv process. The experimental of hemicellulose hydrolysis from corn stalk is carried out in a batch at laboratory scale. Experimental variables are, concentration of formic acid (70; 80; 90% wt), the reaction time (0, 15, 30, 45, 60, 75, 90,105, 120, 135, 150, 165, 180 minutes) and ratio of liquid-solid is 10:1, with catalyst hydrochloric acid 0.2% wt. The experimental result shows that the hydrolysis of hemicellulose from corn stalk in organosolv process produce xylose and furfural which can be used as raw material in industry. Diluted xylose and furfural in black liquor in this experiment are xylose (0.88-3,78 gr/liter) and furfural (1.7-3.69 gr) with percentage of hemicellulose recovery range from 37-82%. The behaviour of  hemicellulose hydrolysis from corn stalk in media formic acid show two series processes that have a different rate. Experimental conformity data exceeded 95% (R-square 95%) with the model hydrolysis of hemicellulose that proposed by Parajo et al [1993]. Key words: formic acid, hydrolysis of  hemicellulose, corn stalk, organosolv
Pembuatan Biodiesel Dari Cpo Off Grade Menggunakan Reaktor Membran Firman Maulana; Syarfi Syarfi; Ida Zahrina
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
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The cost of biodiesel production process is still a challenge, it needs to explore any raw material which is economically inexpensive and effective technologies to overcome the problem. CPO off grade is deemed economically potential to be processed into biodiesel because its inexpensive cost . Membrane reactor is an alternative technology that need to be developed  to address this challenge . The research aimed to study the effect of oil to methanol mole ratio and transmembrane pressure on biodiesel production from CPO Off Grade . The study was conducted using two- step process , namely the process of esterification and transesterification process . Esterification process was carried out with variation of oil to methanol mole ratio of 1:12. The amount acid catalyst used is  2 % by weight of oil and reaction time of 2 hours . Transesterification process is carried out on membrane reactor with  variation of oil to methanol mole ratio of 1:12 , 1:16 and 1:20 and transmembrane pressure of 1 bar , 1.5 bar , 2 bars and a catalyst concentration of 1 wt% base oil and process temperature of 60 º C. The results showed the highest conversion reached 80.14 % at the mole ratio of 1:20 and transmembrane pressure of 2 bar    Keywords : Biodiesel, CPO Off Grade, Membrane Reactor, Mole ratio, Transmembran Pressure.

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