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31,456 Article Results

Investigation of the Optimal Position of Wind Sensors and Wind Turbines on a Building: A Computational Fluid Dynamics Study

10.11591/ijeecs.v8.i3.pp756-761
Leon Chan , Mohd Eqwan Bin Mohd Roslan , Hassan Bin Mohamed
Most numerical studies on flow over buildings simplify the geometry of the roof and assume that it is flat. This may lead to misrepresentation of the flow as the roof of actual buildings contains some sort of roughness. In this study, the flow over the administrative building of Universiti Tenaga Nasional is investigated for multidirectional flow conditions. The actual topology of the building is gridded and simulated using the steady-state Reynolds-averaged Navier-Stokes equation. Four points at the top of the building are identified and the wind statistics at these designated locations at three different heights are investigated. The optimal location with the highest average wind speed and consistent wind speeds for all wind angles is identified and is earmarked as a potential location to install the wind turbine. 
Volume: 8
Issue: 3
Page: 756-761
Publish at: 2017-12-01

Compact Dual-band Parallel Coupled T-shaped SIR Filter for WLAN Applications

10.12928/telkomnika.v15i4.5584
Emad S.; University of Technology, Iraq Ahmaed
In this article, a new compact dual-band bandpass filter was introduced. The filter utilized two operating bands centered at 2.45 GHz and 5 GHz widely used for wireless local area network applications. The filter consists of T-shaped sections of step impedance resonator. The structure is an even symmetrical around electrical or magnetic wall, so the operation mechanism of the filter can be analyzed by an even- and odd-mode transmission line theory. The resonator structure is parallel coupled to a pair of 50 Ω input/output ports. Proper feeding and coupling structures can realize at least two transmission zeros around each of the operating band. To enhance the spurs rejection in the out of the band response of the filter, additive transmission zero at 10 GHz was created by adding stub of quarter guided wavelength at a selected distant from the output port edge. The filter is designed and optimized using the full wave Electromagnetic simulator. The center frequency of the designed bands can be easily refined by the filter dimensions. The overall dimension of the filter is (where  is the guided wavelength at the frequency of 2.45 GHz) corresponding to 14.3 mm x 22 mm.
Volume: 15
Issue: 4
Page: 1677-1681
Publish at: 2017-12-01

Parallel Connected VSI Inverter using Multi-carrier based Sinusoidal PWM Technique

10.12928/telkomnika.v15i4.6477
D.; SRM University, India Karthikeyan , R.; SRM University, India Palanisamy , K.; SRM University, India Vijayakumar , A.; Navodaya Institute of Technology, India Velu , D.; SRM University, India Selvabharathi
This paper explains the simulation and modelling of Parallel operation of VSI inverter using multi-carrier based PWM technique. By this proposed method three level inverter output voltages generated instead of using multilevel inverter or two level dual VSI inverter. This system employs single dc voltage source, which gives supply to both VSI inverter by using parallel connection. The multi-carrier based pulse width modulation technique affianced to control the inverter power switches. The proposed system offers improved output voltage, better current control and reduced harmonic distortion. The simulation results of this proposed system was verified using matlab/simulink.
Volume: 15
Issue: 4
Page: 1625-1631
Publish at: 2017-12-01

Fault Distance Identification Using Impedance and Matching Approaches on Distribution Network

10.11591/ijeecs.v8.i3.pp770-778
Lilik Jamilatul Awalin , H. Mokhlis , M. K. Rahmat , Sophi Shilpa , Fadi Albatsh , Bazilah Ismail
In this paper, impedance based method and matching approaches were used separately to detect three phase to ground fault (LLLGF). In order to observe the accuracy of each method, Non-homogeneous distribution network was used as a tested network. Actual data from TNB (Tenaga National Berhad) Malaysia was adopted to model the network by using PSCAD/EMTDC simulation program.  Both methods were tested to observe the accuracy of fault distance estimation. The comparison result shows different accuracy for each section which simulated in the middle of section. Based on the complexity of the distribution network, it possible to contribute difficulty to obtain the maximum accuracy. The result was obtained through the complete process which involves the database formation acquired through the PSCAD/EMTDC software simulator and the fault location distance calculation carried out by the MATLAB software.
Volume: 8
Issue: 3
Page: 770-778
Publish at: 2017-12-01

Capacitive and Inductive Line Reactance for Network Reconfiguration

10.11591/ijeecs.v8.i3.pp751-755
Aiman Suhailah Saifuddin , Karmila Kamil , Halimatun Hashim , Ruthraganapathy Radhakrishnan
Solar PV may cause power congestion to occur in a transmission line when there is high solar irradiance that causing solar PV to generate more power flow than demanded power flow. Transmission line congestion that can be made worst by adding extra power generating farm such as centralized PV farm of renewable energy which helps to deliver customers with the demand or load required. The power generated coming from solar PV is depending on the weather and can definitely worsen the flow in transmission line due to the power captured. In this case, the high solar irradiance can affect the power generated from solar PV and will cause power congestion when power generated is higher than the load demanded. In this paper, the proposed method used to overcome the power congestion in a transmission line is by rerouting the excess power from the overloaded line to underloaded line by changing the line reactance of the line. An IEEE 30 bus test system is developed in PSS/E software as the test system. The output monitored is the line stability index of the affected line before and after rerouting process.
Volume: 8
Issue: 3
Page: 751-755
Publish at: 2017-12-01

The Impact of Color Space and Intensity Normalization to Face Detection Performance

10.12928/telkomnika.v15i4.6718
I Nyoman; Udayana University Bukit Jimbaran Politeknik Negeri Bali, Indonesia Gede Arya Astawa , I Ketut; Udayana University, Indonesia Gede Darma Putra , I; Udayana University, Indonesia Made Sudarma , Rukmi; Udayana University, Indonesia Sari Hartati
In this study, human face detection have been widely conducted and it is still interesting to be research. In this research, strong impact of color space for face i.e., many and multi faces detection by using YIQ, YCbCr, HSV, HSL, CIELAB, and CIELUV are proposed. In this experiment, intensity normality method in one of the color space channel and tested the faces using Android based have been developed. The faces multi image datasets came from social media, mobile phone and digital camera. In this experiment, the color space YCbCr percentage value with the image initial value detection before processing are 67.15%, 75.00%, and 64.58% have been reached. Then, after the normalization process are 83.21%, 87.12%, and 80.21% have been increased. Furthermore, this study showed that color space of YCbCr have reached improvement percentage
Volume: 15
Issue: 4
Page: 1895-1900
Publish at: 2017-12-01

Impacts of Average Power Factor Management Into Sharing System with Discrete Production

10.11591/ijeecs.v8.i3.pp698-699
J. S. Ashwin , N. Manoharan
Electrical frameworks are definitely influenced by power misfortunes, predominantly because of the present moving through lines and transformers. Streams rely on upon end-clients' energy ingestion and are entirely identified with the general power calculate, coming about because of burdens, remunerating units and conveyed era. The powers consider administration affects organize control misfortunes and voltage profiles along conveyance lines. Previously, before the appropriated era dissemination, the system misfortunes minimization could be acquired by requiring a high normal influence element to end-clients, assessing the parameter on the bill time frame. In an unexpected way, these days the power considers administration for dynamic clients is requiring distinctive guidelines, since the past explanation is no longer legitimate. The paper researches irregularities between neighborhood era and present power calculate prerequisites the Italian setting. Contemplations about measuring remunerating gadgets are presented, as per the current advancement of association codes. Misfortunes are analyzed considering diverse reference influence variables, nearby era sum and generators' association topologies. Results are confirmed basing on information from meters introduced in dispersion systems.
Volume: 8
Issue: 3
Page: 698-699
Publish at: 2017-12-01

Decision Support System On Computer Maintenance Management SystemUsing Association Rule and Fisher Exact Test One Side P-Value

10.12928/telkomnika.v15i4.5880
Farid; Universitas Muhammadiyah Gresik, Indonesia Sukmana , Fahrur; STKIP PGRI Tulung Agung, Indonesia Rozi
Decision-makinghas been growth rapidly and many methods can used. Thus, how to apply that methode not only fast but also right. One of implementationdecision making is decision support system in Computer Maintenance Management System (CMMS). This research using data test with Association Rule and Fisher Exact One Side P-Value from same problems in Computer Maintenance Management System (CMMS). Object from this research to get pattern of association between symptom and root cause, to prove relation those variable. Previous research prove any relation between that two variable when use Association Rule and Pearson Chi-Square but many rule must eliminated because not ineligable from Pearson Chi-Square. The meaning of this research to confirm proof of test relation between symptom and root cause in CMMS. And hope with this result of test can make strength hypothesis from previous research.
Volume: 15
Issue: 4
Page: 1841-1851
Publish at: 2017-12-01

Implementation of Cloud connected Smart Plug with Energy Monitoring System

10.11591/ijeecs.v8.i3.pp702-704
C. Chennakesavan
Internet of Things (IoT) is the expansion of web administrations. Employments of new advancements in IoT condition are expanding quickly. A Smart Home is additionally one of the uses of IoT. A Smart Switchboard constrains customer’s execution in watching home settings and controlling home machines. This paper shows an approach to manage the progression of Smart Home applications by consolidating IoT with Web server and Cloud organize. The approach concentrates on: (1) implanting insight into sensors utilizing Energia stage [7]; (2) Creating collaborations with brilliant things utilizing Blynk-Cloud stage; (3) expanding information trade proficiency. At the point when these family unit gadgets in brilliant homes interface with the web utilizing legitimate design, then entire framework can be called as Smart Home in IoT condition or IoT based Smart Homes. Keen Homes contains family unit gadgets/home apparatuses could screen and control remotely. In addition, we execute three cases to show the approach's possibility and productivity, i.e., measuring home conditions, observing electrical machines, and controlling home robotization. 
Volume: 8
Issue: 3
Page: 702-704
Publish at: 2017-12-01

New Waste Material to Enhance the Performance of Grounding System

10.12928/telkomnika.v15i4.7231
Nazatul; National Defence University of Malaysia, Malaysia Shiema Moh Nazar , Suresh; National Defence University of Malaysia, Malaysia Thanakodi , Hazuwan; National Defence University of Malaysia, Malaysia Muhammad
This paper presents the new waste material to enhance the grounding system application by using Rice Straw Ashes as backfill to reduce the grounding resistance of the grounding system. Due to the importance of the grounding system, this paper discussed the effectiveness of the grounding system after using the additive material. The additive material that used are rice straw ash and bagasse ash. The technique that used in this paper is a vertical type because more economical to install. From the result, it was found that depth of electrode and soil treatment has an impact in reducing the grounding resistance. In addition, Rice Straw ashes provide a better grounding performance comparable to Bagasse ashes. 
Volume: 15
Issue: 4
Page: 1530-1539
Publish at: 2017-12-01

An Advancement in Paper Receipts the Electronic Receipt Administration Framework

10.11591/ijeecs.v8.i3.pp631-632
Vimal Kumar Stephen. K , V. Mathivanan
The issue our group locations is best conveyed in the accompanying inquiry: Given the quantity of dealers, shoppers, and money related organizations in the U.S., how might we assemble a recordkeeping framework that enhances the ease of use, availability, and supportability of customer exchange records. A current review demonstrates that 80% of the U.S. populace gets one to three receipts a day, 11% of which promptly escape With America's retailers creating roughly 228.7 million pounds of receipt paper every year, this means 22.87 million pounds of paper that in a flash move toward becoming refuse . Promote, the present framework does not make receipts promptly open to traders and shoppers when they require them. In this venture, our group means to enhance the administration of shopper exchange records while diminishing the quantity of receipts imprinted in the United States. An answer for this issue will likewise furnish buyers with a more advantageous approach to screen their ways of managing money.The framework is made out of four sections: an electronic UI, a deride money enroll, a receipt administration database, and a XML convention that conveys between the money enlist and the receipt database. On the off chance that executed on a national scale, this electronic receipt administration framework would permit clients (dealers, shoppers, and monetary organizations) access to all receipt information in one area and in one steady configuration, in this way wiping out the requirement for paper receipts.
Volume: 8
Issue: 3
Page: 631-632
Publish at: 2017-12-01

Bloom Filter Implementation in Cache with Low Level of False Positive

10.12928/telkomnika.v15i4.4447
Andri; Bogor Agricultural University, Indonesia Hidayat , Fahren; Bogor Agricultural University, Indonesia Bukhari , Heru; Bogor Agricultural University, Indonesia Sukoco
Searching techniques significantly determine the speed of getting the information or objects. Finding an object in a set is related to membership checking. In the case of massive data, it needs an appropriate technique to search an object accurately and faster. This research implements searching methods, namely Bloom Filter and Sequential Search algorithms, to find objects in a set of data. It aims to improve our system getting a proper item. Due to the possibility of False-Positive existence as a result of Bloom filter technique, there is a potentially inaccurate representation to object sought. Some parameters are influencing False-Positive, namely the number of objects, available bits, and the number of mapped-bit. A Combination of those parameters could decrease the level of False-Positive and improve their accuracy and faster accessibility. In this research, we use three data object variations with the biggest object size of  2000000. Cached objects used in our experiments is between 2 – 20% of variation from the generated objects. The best results with the lowest False-Positive is a combination of bit = 8, mapped bit = 7, and 6% of cache size from 2000000 generated objects.
Volume: 15
Issue: 4
Page: 1912-1917
Publish at: 2017-12-01

Videoconference System for Rural Education: Issues, Challenges, and Solutions a Title is Fewest Possible Words

10.12928/telkomnika.v15i4.6291
Kusprasapta; Institut Teknologi Bandung, Indonesia Mutijarsa , Yoanes; Institut Teknologi Bandung, Indonesia Bandung , Luki Bangun; Institut Teknologi Bandung, Indonesia Subekti
In this paper, we presented issues, challenges, and solutions of videoconference system for rural education. First, we discussed several issues on the implementation of videoconference system for education, particulary in rural area in Indonesia, which covered videoconference requirement, rural condition, and education needs. Second, we presented several challenges consisted of choosing videoconference technology, choosing compression method, system and application development, ensuring quality of services, and ensuring quality of experiences. Based on the issues and challenges, we proposed a solution of videoconference system which is specifically deployed in rural education. The solution was based on WebRTC technology implemented in Intel i5 core miniPC choosen to increase portability of the system. A STUN server was built on Javascript to facilitate communication between each client terminal. A simple and intuitive user interface was designed to facilitate the use of application by rural people. The system was deployed at two elementary schools in Cianjur, West Java, representing rural education in Indonesia. From the experiment, we obtained video sent data rate 82 kbit/s, video received data rate 245 kbit/s, average delay 316 ms and packet lost rate 1.32%. The experiment results showed that the audio and video quality can be accepted by users to implement distance learning.
Volume: 15
Issue: 4
Page: 1901-1911
Publish at: 2017-12-01

Identification of Rare Genetic Disorder from Single Nucleotide Variants Using Supervised Learning Technique

10.11591/ijai.v6.i4.pp174-184
Sathyavikasini K , Vijaya M S
Muscular dystrophy is a rare genetic disorder that affects the muscular system which deteriorates the skeletal muscles and hinders locomotion. In the finding of genetic disorders such as Muscular dystrophy, the disease is identified based on mutations in the gene sequence. A new model is proposed for classifying the disease accurately using gene sequences, mutated by adopting positional cloning on the reference cDNA sequence. The features of mutated gene sequences for missense, nonsense and silent mutations aims in distinguishing the type of disease and the classifiers are trained with commonly used supervised pattern learning techniques.10-fold cross validation results show that the decision tree algorithm was found to attain the best accuracy of 100%. In summary, this study provides an automatic model to classify the muscular dystrophy disease and shed a new light on predicting the genetic disorder from gene based features through pattern recognition model.
Volume: 6
Issue: 4
Page: 174-184
Publish at: 2017-12-01

A Comprehensive Survey on Comparisons across Contextual Pre-filtering, Contextual Post-filtering and Contextual Modelling Approaches

10.12928/telkomnika.v15i4.6875
Khalid; University of Malaya Bayero University, Malaysia Haruna , Maizatul; University of Malaya, Malaysia Akmar Ismail , Damiasih; Sekolah Tinggi Pariwisata Ambarrukmo, Indonesia Damiasih , Haruna; Federal College of Education (Technical) Gombe, Nigeria Chiroma , Tutut; Politeknik Negeri Malang Sekolah Tinggi Pariwisata Ambarrukmo Universitas Teknologi Yogyakarta, Indonesia Herawan
Recently, there has been growing interest in recommender systems (RS) and particularly in context-aware RS. Methods for generating context-aware recommendations are classified into pre-filtering, post-filtering and contextual modelling approaches. In this paper, we present the several novel approaches of the different variant of each of these three contextualization paradigms and present a complete survey on the state-of-the-art comparisons across them. We then identify the significant challenges that require being addressed by the current RS researchers, which will help academicians and practitioners in comparing these three approaches to select the best alternative according to their strategies.
Volume: 15
Issue: 4
Page: 1865-1874
Publish at: 2017-12-01
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