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International Journal of Electrical and Computer Engineering
Published by Institute of Advanced Engineering and Science
ISSN : 20888708     EISSN : 27222578     DOI : -
Core Subject : Science, Engineering,
Computer Science & IT Electrical & Electronics Engineering
International Journal of Electrical and Computer Engineering (IJECE, ISSN: 2088-8708, a SCOPUS indexed Journal, SNIP: 1.001; SJR: 0.296; CiteScore: 0.99; SJR & CiteScore Q2 on both of the Electrical & Electronics Engineering, and Computer Science) is the official publication of the Institute of Advanced Engineering and Science (IAES). The journal is open to submission from scholars and experts in the wide areas of electrical, electronics, instrumentation, control, telecommunication and computer engineering from the global world.
Arjuna Subject : Ilmu Komputer (semua kategori) - Ilmu Komputer (Lain-Lain)
Articles 18 Documents
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Search results for , issue "Vol 3, No 4: August 2013" : 18 Documents clear
A Novel Small Sierpenski Antennas Abdelhak Ferchichi; Gharsallah Ali
International Journal of Electrical and Computer Engineering (IJECE) Vol 3, No 4: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

In This paper, new small antenna is described and it is designed to be used in RFID applications at microwave frequencies. This structure represents a new version of sierpenski antenna. The reduction of size by more than 75% gives this patch a great inters.  Two equivalent resonant models are presented based on a model of triangular and sierpenski patch antennas.DOI:http://dx.doi.org/10.11591/ijece.v3i4.2580
A Unified Codec Scheme for reduction of Area and Crosstalk in RC and RLC Modeled Interconnects using both Bus Encoding and Shielding Insertion Technique Dhriti Duggal; Gurmohan Singh; Manjit Kaur
International Journal of Electrical and Computer Engineering (IJECE) Vol 3, No 4: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper presents a unified codec scheme for reduction of area and crosstalk in RC and RLC modeled interconnects using both bus encoding and shielding insertion technique. It is based upon bus invert method and focuses on 4 bit coupled lines. Previously used codec scheme focused independently on either RC or RLC models and they considered coupling between 5 bit coupled lines i.e. 4 bit data lines and 1 bit control line. However, our proposed codec scheme focuses on all types of couplings i.e. Type-0 to Type-4 and demonstrates an overall reduction in area as well as crosstalk considering coupling between 4 bit coupled lines and isolating the control signal using redundant shielding thus reducing the cases of coupling drastically. The proposed work has been implemented using both Semi Custom and Full Custom design approaches. The model has been described, synthesized and simulated in hardware description language VHDL along with its FPGA implementation. The power consumption has been calculated using Xpower tool of Xilinx. Same model has also been implemented using Cadence Virtuoso Analog Design Suite in 0.18um CMOS technology and the corresponding power, delay and area has been computed. The proposed scheme demonstrates an overall reduction of 76.68% in crosstalk delay and 56.33% in chip area and transistor count. 79.58% power reduction is achieved in full-custom design implementation as compared to semi-custom design implementation.DOI:http://dx.doi.org/10.11591/ijece.v3i4.3173
Defect Detection of Tiles Based On High Frequency Distortion Afsaneh Fathi; Ahmad Reza Eskandari
International Journal of Electrical and Computer Engineering (IJECE) Vol 3, No 4: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Quality control in Tiles Industry is of great importance. Therefore, it is effective to improve an automatic inspection system, instead of manpower, to increase accuracy and velocity and decrease costs. To this end, a new method to segment tile surfaces is offered in this study. This method aims at detecting defective areas in a tile, based on extracting features of edge defects. This method is based on the idea that human eye can better perceive the defects in a tile by looking at its edges. In the proposed method, first, in order to extract frequency characteristics resistant against transference, Undecimated Discrete Wavelet Packets transform is applied on images. Later, by computing local entropy values on high-frequency sub-bands images, those which appropriately include images defects are chosen to extract statistical features. Finally, Back propagation neural network method is used to determine segmented images containing defective areas. The obtained results, both visually and computationally indicates the higher efficacy of this method compared with the related state of the art methods.DOI:http://dx.doi.org/10.11591/ijece.v3i4.3014
Enhancement of AC System Stability using Artificial Neural Network Based HVDC Controls Nagu Nayak Bhukya; Ramana Rao P.V.; Sydulu M.
International Journal of Electrical and Computer Engineering (IJECE) Vol 3, No 4: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

In this paper, investigation is carried out for the improvement of power system stability by utilizing auxiliary controls for controlling HVDC power flow. The current controller model and the line dynamics are considered in the stability analysis. Transient stability analysis is done on a multi-machine system, where, a neural network controller is developed to improve the stability of the power system and to improve the response time of the controller to the changing conditions in power system. The results show the application of the neural network controller in AC-DC power systems and case studied at different fault locations.DOI:http://dx.doi.org/10.11591/ijece.v3i4.2590
Energy Efficiency Opportunities and Savings Potential for Electric Motor and Its Impact on GHG Emissions Reduction Molla Shahadat Hossain Lipu; Tahia Fahrin Karim
International Journal of Electrical and Computer Engineering (IJECE) Vol 3, No 4: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Motors are the single largest users of electric power, consuming over half of all electricity and more than 60% of that used in the industrial sector.  The use of energy-efficient motor technologies offers utilities the possibility of achieving substantial energy savings and reduction of GHG emissions. This paper presents a comprehensive literature review about energy efficiency opportunities and savings potential for electric motor. This paper compiles latest literatures in terms of journal articles, conference proceedings, web materials, reports, books, handbooks on electrical motor energy use, and opportunities for energy efficiency as well as energy savings strategies. Besides, present status of the efficient motor technology, market potential have been presented in this paper. Also, different energy savings strategies such as rewinding, use of variable speed drive (VSD), and capacitor bank to improve the power factor to reduce their energy uses have also been reviewed. Furthermore, cost parameters to carry out economic analysis and payback period for different energy savings strategies have been shown as well.DOI:http://dx.doi.org/10.11591/ijece.v3i4.3592
Adjusting WiMAX for a Dedicated Surveillance Network Suherman Suherman; Marwan Al-Akaidi
International Journal of Electrical and Computer Engineering (IJECE) Vol 3, No 4: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

WiMAX (Worldwide Interoperability for Microwave Access) devices have been used widely in the market. WiMAX-based video surveillance products have also been available. The acceptance of WiMAX in the market, as well as the availability of WiMAX products, contributes to the possibility of implementing it for dedicated video surveillance application. However, since WiMAX is designed to accommodate various applications with different quality of service (QoS) requirements, WiMAX–based dedicated surveillance network may not achieve optimum performance, as all SSs generate the same QoS requirements. The scheduler cannot implement traffic type priority; therefore, service classification does not work as expected. This paper proposes WiMAX adjustment to transform a multi-purpose WiMAX network into a network dedicated to video surveillance. NS-2 simulations show that the proposed adjustment is able to deliver low delay and high quality video surveillance.DOI:http://dx.doi.org/10.11591/ijece.v3i4.3181
A Novel Two Switch Non-inverting Buck-Boost Converter based Maximum Power Point Tracking System Khandker Tawfique Ahmed; Mithun Datta; Nur Mohammad
International Journal of Electrical and Computer Engineering (IJECE) Vol 3, No 4: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

A solar module can’t transfer maximum power to the load itself due to impedance mismatch. A maximum power point tracking (MPPT) system could be employed to have the maximum power.  A new MPPT system has been developed using Buck-Boost type DC-DC converter. The system is highly efficient and robust. PIC16F73 microcontroller has been used to control the DC-DC converter output. PV module output power is measured using microcontroller. The output power is compared with the previous module output power and the duty cycle of the converter is adjusted continuously to track MPP.  This process repeats until the output power reaches near to the maximum power point.In this paper, a maximum power point tracking (MPPT) system is developed using  two-switch non-inverting buck-boost converter. Perturb and observe (P & O) MPPT algorithm is used to transfer maximum power from the PV panel which is executed using a microcontroller.DOI:http://dx.doi.org/10.11591/ijece.v3i4.2772
Enforcing Multi-user Security Policies in Cloud Computing Shubhada Parashar Mone; Sunita S. Dhotre
International Journal of Electrical and Computer Engineering (IJECE) Vol 3, No 4: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

The user can access data from any server with unlimited data with the security. Multi-user tendency will cost lesser than the expected cost in the single user environment. While dealing with cloud computing, confidential data can be secured from the unauthorized access and internal threats. Cloud servers use smart techniques for achieving this requirement like encryption and decryption of data. The database is stored in the encrypted format on the server & a complex query can be fired on it. Cloud server will maintain the access control policies to reveal the data from the database that are in the encrypted format. In the access control policies, we use KMA (Key Management Authority) which provides the keyset for encryption & decryption of the database. The attributes entered by the user will create one public key which is cipher text based. So this technique is called as cipher text based technique. This key is used for encryption. While registering, user will choose the policy and select the attributes on which security policy is based. Because of this it is called as cipher text policy attribute based encryption (CP-ABE). To achieve this complex encryption, we can use many algorithms like AES or DES encryption algorithms with CPABE algorithm. This scheme allows making SQL-like queries on encrypted database in multiuser environment while at the same time, the database owner assign different access rights to users that defines a specific policy for the database. The major use of this encryption is privacy, access control and data confidentiality and multi-user access control.DOI:http://dx.doi.org/10.11591/ijece.v3i4.3061
An Optimal State Feedback Controller Based Neural Networks for Synchronous Generator Excitation Control System Moath Hasan Al-qatamin
International Journal of Electrical and Computer Engineering (IJECE) Vol 3, No 4: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

In this paper, an artificial neural network (ANN) is designed to optimize thematrix gain of state feedback controller. A linear mathematical model of asynchronous generator with excitation system is used as controlled system.The conventional methods that used to find the matrix gain need tediouscalculations with compared to neural networks. The simulation proves thatthe proposed feedback controller based neural network optimization method has the better result in order to prove the dynamic performance of a single machine connected to infinite bus system(SMIB). The robustness of the proposed controller is tested by disturbance in excitation voltage. The results are compared with results of controller based on conventional methods. Thepotentials of the proposed technique are investigated using MATLAB software.DOI:http://dx.doi.org/10.11591/ijece.v3i4.3125
Design and Analysis of Tripple Band Koch Fractal Yagi Uda Antenna Satyandra Singh Lodhi; P.K. Singhal; V.V. Thakare
International Journal of Electrical and Computer Engineering (IJECE) Vol 3, No 4: August 2013
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (282.645 KB)

Abstract

The proposed antenna is Koch fractal printed Yagi-Uda antenna fed by SMA connector. The radiation characteristics of the antenna are simulated by CST Microwave Studio and analysed with the help of simulated results. The antenna's currents distribution becomes more uniform after being fractal, which is conducive to increase the antenna’s radiation directivity. The proposed Koch fractal Yagi-Uda antenna resonance at frequency of 7.81 GHz, 8.54 GHz and 9.42 GHz with gain of 9.67 dB, 10.4 dB and 10.61dB respectively. Parameter of antenna such as return loss, input impedance, smith chart, radiation pattern is analyzed for performance evaluation of Koch fractal Yagi-Uda antenna.DOI:http://dx.doi.org/10.11591/ijece.v3i4.2572

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