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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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Durabilitas Ac-Wc Sfesifikasi Bina Marga 2010 Menggunakan Pasir Alam Kampar Dengan Uji Rendaman Modifikasi Marshall Sutazril, Mukhelnalis; Sentosa, Leo
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

In Indonesia the weather condition has big influence on pavement performance and the reductionservice life. Moment happened by floods, repeatedly load repetation and seep water among asphalt and rock representing cause the happening of road pavement damage. The use of natural sand as fine aggregate in AC (Asphalt Concrate) mixture is limited to a minimum value of 15% oftotal of mixture weight. Evaluation from the aspect of utilization cost shows that natural sand is cheaper than fine aggregate from stone crushing process because of no extra cost for crushing. In this reseach, used specification of Bina Marga 2010 by using a variation of fine aggregate type ofsand for  AC/WC fine gradation mixture. The variation used are 0%, 5%, 10%, 15%, 20%, 25%,and 30% of total aggregate mixture. Tests were performed using the Marshall test with differentimmersion time, i.e. Marshall standard, 1 day, 4 days, 7 days, and 28 days of immersion in the bath with the temperature of 600 C. The result show the variation of performance durability with the addition of natural sand content of 15% in optimum asphalt 6,25% has the smallest value of the first durability index with 6,70%, and durability performance of the mixture with the addition of natural sand content of 15% in optimum asphalt 6,25% has the smallest value of the second durability index with 15,70%. This mixture is more resistant (durable) to the effects of immersion in water.Keywords: natural sand, asphalt concrete AC / WC, Bina Marga Spesification 2010 and durability.
Pengaruh Spasi Pada Performa Prefabricated Vertical Drain (PVD) Dalam Perbaikan Tanah Lunak Hayatul Hamida; Syawal Satibi; Muhardi Muhardi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Soil condition heaps of times be a problem in a construction work, it is cause the condition soft soil layer have low permeability. Soft ground improvement with vertical drain  is complex analysis for consolidation, got in on space  of prefabricated vertical drain  (PVD). Space is influential at times of settlement. If space too small then it’s not economical, because it will more point to installation PVD. So, did analysis comparison Chai et al method and average method. This comparison between the two method give the result is not to be different, so installation PVD should be with space 1,5 m. it’s from the result with soil data of PLTU Riau. Keywords: Ground Improvement,  penetrated  vertical drain, degree of consolidation (U)
Pengaruh Spasi Pada Performa Prefabricated Vertical Drain (PVD) Dalam Perbaikan Tanah Lunak Hamida, Hayatul; Satibi, Syawal; Muhardi, Muhardi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Soil condition heaps of times be a problem in a construction work, it is cause the condition soft soil layer have low permeability. Soft ground improvement with vertical drain  is complex analysis for consolidation, got in on space  of prefabricated vertical drain  (PVD). Space is influential at times of settlement. If space too small then it’s not economical, because it will more point to installation PVD. So, did analysis comparison Chai et al method and average method. This comparison between the two method give the result is not to be different, so installation PVD should be with space 1,5 m. it’s from the result with soil data of PLTU Riau. Keywords: Ground Improvement,  penetrated  vertical drain, degree of consolidation (U)
Perancangan Topologi Ring Dengan Spanning Tree Protocol Pada Jaringan Internet Area Perkantoran Bangko PT. Chevron Pacific Indonesia Riski Ramadhani; Linna Oktaviana; Anhar Anhar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Bangko Offices Area  in  PT. Chevron Pacific Indonesia require a network with reliability, stability, and efficiency to support  the company. Currently, there are many problems  that occur in today's network  such  as  the  link that was frequently interrupted,  no  backup  paths in the network, and the speed of the link is still not uniform. Therefore, it is important to design a new network  to solve that problem. In the new network design, used a ring topology plus additional backup lines, 1 Gbps bandwidth allocation, and the use of the spanning tree protocol. The design of the new network  is done by using software OPNET Modeler with the parameters are delays and throughput. The needs of planning for next 5 years will be fulfilled with 1 Gpbs bandwidth alocation and  the implementation of the spanning tree protocol will  avoid loops and maintain network connectivity. With the new network design will be obtained a good Quality of Service with the network delays  value corresponding to the category of delay and regularly use the service based on the priority determined.  Keywords: network, bandwidth, spanning tree protocol, OPNET Modeler
Analisa Ketidak Seimbangan Beban Terhadap Arus Netral Dan Losses Pada Transformator Distribusi Di Gedung Fakultas Teknik Universitas Riau Fahrurozi, Fahrurozi; Firdaus, Firdaus; Feranita, Feranita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Load Imbalancing in power distribution system that has been occurred either by inconstant load factor in its phase or power on with diffrent period. The consequences of Load Imbalancing is current appears in neutral trafo and losses cannot avoid. Decreasing quality of voltage and current, trafo efficiency, enegy measuring is loss that caused. voltage and Current quality is going decrease due to 0 current distort basic wave until bad. Keywords: loadimbalance, losses, and neutral current.
Rancang Bangun Modulator FM David Satria Efendi; Febrizal Febrizal; Rahyul Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

FM modulator is a device used for the modulation process. Modulation is a process to lay the information signal on carrier signal for reduce interference and noise when signal ispropagated. The information signal has 3,4 KHz in frequency , and will be modulated with 19 KHz (carrier signal). FM modulator is designed with PLL (Phase Locked Loop) method, itused the concept of phase signal locking . FM modulator with PLL method consist of four blocks, that is oscillator colpitt, phase comparator, second orde LPF butterworth and VCOwienbridge. Design of FM modulator trainer begins with calculate to determine the component value which suitable with cut off frequency. The next process to make the layoutof the pcb board, dissolution layout, pcb board drilling, mounting the female connectors to pcb board, installation of component connectors to the header, and make a box to placetrainer FM demodulator. The results obtained at each signal fm demodulator block is different. The modulated signal is obtained at the VCO wienbridge.Keywords : FM Modulator, Modulated Signal, Phase Locked Loop, Carrier Signal,Information Signal.
Rancang Bangun Demodulator FM Ronie, Hilmun Syah; Anhar, Anhar; Amri, Rahyul
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

FM demodulator is used to demodulate signal in FM receiver. Demodulation process is performed to recover the information signal. The information signal is 3.4 kHz which ismodulated with a carrier signal of 19 kHz. FM demodulator is designed with PLL (Phase Locked Loop) method, it used the concept of phase locking signal. FM demodulator withPLL method consist of four blocks, that is phase comparator, second-order Butterworth LPF, VCO wienbridge, and buffer amplifiers. Design of FM demodulator trainer begins with calculate to determine the component value which suitable with cut off frequency. The next process to make the layout of the pcb board, dissolution layout, pcb board drilling, mounting the female connectors to pcb board, installation of component connectors to the header, and make a box to place trainer FM demodulator. The results obtained at each signal FM demodulator block is different. Demodulated signal is obtained at the buffer amplifier block, where the signal is same as the output signal at function generator is 3.4 kHz.Keywords : FM Demodulator, Demodulated Signal, Phase Look Loop, Carrier Signal, Information Signal.
Analisa Efisiensi Energi Algoritma Routing Low-Energy Adaptive Clustering Hierarchy (LEACH) Pada Wireless Sensor Network (WSN) Menggunakan MATLAB Darbi, Ahmad; Rahayu, Yusnita; Sari, Linna Oktaviana
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Wireless sensor networks  (WSN)  consists of a large number of sensor nodes.  It has been pervasive in various applications including health care system, battlefield surveillance system, environment monitoring system and so on.  The main issues of WSN is about how to extend lifetime by reducing  power consumption of sensor nodes. Since  the most energy is used for transmitting and receiving packet, and replacing batteries as a main power source of sensor nodes are impossible due the location of sensor nodes that is hazardous, routing protocol become the best solution for minimize power consumption of sensor nodes. Many routing protocols have been proposed to increase lifetime of WSN. One of these protocols called LEACH (Low Energy Adaptive Clustering Hierarchy). LEACH is the first clustering based routing protocol, many researcher proposed new protocols and compared it’s performance with LEACH. So, we decided to analyze LEACH using MATLAB. We found that LEACH can be more effective  if more number of nodes in networks with the right number of cluster, more initial energy and if location of base station is near from the plan. Keywords : Wireless Sensor Networks, LEACH, Lifetime
Evaluasi Kinerja Kompor UB-03-1 Berbahan Bakar Limbah Industri Kayu Olahan, Tempurung Kelapa, Pelepah Sawit, Dan Ranting Kayu Akasia Eko Karmiza; Sri Helianty; Zulfansyah Zulfansyah
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The availability of biomass as a source of primary energy in Indonesia is very abundant, reaching 280 million barrels of oil equivalent (BOE) and approximately 84% of the biomass has been used for the household sector. The application of gasification stove especially in cooking purposes can  increase  the efficiency of fuel usage. This research used UB-03-1 semi-gasification with various of biomass, such as acacia of branches, palm frond,  tropical wood and coconut shell. The moisture content measurement of biomass fuels was determined using oven-dry method. The efficiency of the biomass fuels in UB-03-1 stove between 13,18 – 45,91%. Tropical wood had the highest energy efficiency of 45,91% and coconut shell had the lowhest energy efficiency of 13,18%. UB-03-1 stove works in the range of 3,5 to 11,5 kWth of fire power. The research obtained indicate that a variety of biomass fuels in Riau can perform well in UB-03-1 stove, such as acacia branches having 4,2 kWth  fire power, palm frond having 4,86 kWth fire power, tropical wood having 11,5 kWth fire power and coconut shell having 3,5 kWth  fire power, thus the need for adoption to combat crisis energy household sector problem Keywords : biomass, semi-gasification stove, water boiling test, UB-03-1
Pembuatan Dan Karaktrisasi Karbon Aktif Berbahan Dasar Cangkang Sawit Dengan Metode Aktivasi Fisika Menggunakan Rotary Autoclave Ibrahim Ibrahim; Awaludin Martin; Nasruddin Nasruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Activated carbon  is an  absorbent  that  has  widely used  because it’s  high absorption  capacity. Necessity  to improve  the quality of activated carbon made from palm shells with low price and easy to obtain. The process of preparation and characteristics of activated carbon conducted in this research  using  physical activation  using  CO2  as the  activating agent.  Carbonization  and activation processes performed in a rotating  furnace  (rotary  autoclave) by flowing nitrogen gas (N2) at 100 ml/min and CO2 flow rate of 250 ml/min. Carbonization temperature 500oC was used with some variation of carbonization time, activation time and activation temperature. The results seen with activated carbon characteristics knowing  iodine numbers obtained  from any activated carbon  produced. Optimum  characteristics of  activated carbon  obtained  by  activation  at  750oC temperature,  the duration of carbonization and activation of activated carbon produced during 2 hours with 603 g / kg of iodine number.Keywords: Rotary Autoclave, iodine, Activated Carbon.

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