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29,734 Article Results

Fractional Order PID Controlled Cascaded Re-boost Seven Level Inverter Fed Induction Motor System with Enhanced Response

10.11591/ijpeds.v9.i4.pp1784-1791
P. Bhaskara Prasad , M. Padma Lalitha , B. Sarvesh
Recently, Re-boost seven-level inverter has been developed as an alternative between Photovoltaic system and single-phase load. DC level is increased using a re-boost regulator and its output is rehabilitated into single-phase AC utilizing a seven-level inverter. The re-boost converter is utilized to escalate the voltage gain. The objective of the suggested closed loop Re-boost Seven Level Inverter fed Induction Motor (RBSLIIM) system is to enhance the dynamic response of RBSLIIM using FO-P-I-D controller. Simulink models are developed for P-I and FO-P-I-D controlled RBSLIIM systems. The results of P-I and FO-P-I-D based RBSLIIM systems indicate that the voltage response with FO-P-I-D is superior to P-I controlled RBSLIIM system.
Volume: 9
Issue: 4
Page: 1784-1791
Publish at: 2018-12-01

Coordinated Placement and Setting of FACTS in Electrical Network based on Kalai-smorodinsky Bargaining Solution and Voltage Deviation Index

10.11591/ijece.v8i6.pp4079-4088
Aziz Oukennou , Abdelhalim Sandali , Samira Elmoumen
To aid the decision maker, the optimal placement of FACTS in the electrical network is performed through very specific criteria. In this paper, a useful approach is followed; it is based particularly on the use of Kalai-Smorodinsky bargaining solution for choosing the best compromise between the different objectives commonly posed to the network manager such as the cost of production, total transmission losses (Tloss), and voltage stability index (Lindex). In the case of many possible solutions, Voltage Profile Quality is added to select the best one. This approach has offered a balanced solution and has proven its effectiveness in finding the best placement and setting of two types of FACTS namely Static Var Compensator (SVC) and Thyristor Controlled Series Compensator (TCSC) in the power system. The test case under investigation is IEEE-14 bus system which has been simulated in MATLAB Environment.
Volume: 8
Issue: 6
Page: 4079-4088
Publish at: 2018-12-01

Ingenious Method for Conducive Handoff Appliance in Cognitive Radio Networks

10.11591/ijece.v8i6.pp5195-5202
J. Josephine Dhivya , M. Ramaswami
Wireless communications deployed in the current epoch claims ceaseless connection among its users thereby leading to the investigation of Cognitive Radio Networks (CRN) which enables to make use of unallocated spectrum optimally and provides uninterrupted connection. Establishing interminable connectivity during the handoff process in spectrum mobility of CRN is a challenging task. This paper elucidates the optimization of handoff process carried out in CRN by incorporating an intelligent method. This includes fuzzy logic wherein the handoff parameters are processed thereby indicating the need of handoff. The proffered method also comprises of a part of genetic algorithm which yields fitness value for reducing the handoff occurrences and enhancing the overall performance of the system is promoted using cuckoo search which decides the mobile node from which the handoff process has to initiate based on the priority generated. This technique ensures that decision is taken ahead of link failure rather than range failure which are the key point in comparison to the existing system. Results obtained through the simulation are satisfactory in terms of delay, throughput, number of failed handoff and handoffs performed in comparison to the existing fuzzy based handoff process in CRN.
Volume: 8
Issue: 6
Page: 5195-5202
Publish at: 2018-12-01

A New Aluminum Pot Line Rectiformer Scheme with Effective Harmonic Suppression Capability

10.11591/ijpeds.v9.i4.pp1573-1583
Mahmood Al-Mahari , S. Ali Al-Mawsawi , Fadhel Albasri
The conversion from alternating current to direct current creates harmonics and causes power quality issues especially when large amount of power being converted. To mitigate these issues, conventional schemes for pot line Rectiformers are integrated with passive harmonic filters (PHF), which are either connected directly to the feeding grid or connected to each tertiary winding of the Rectiformer regulating transformer. This paper presents a new pot line Rectiformer scheme that reduces the distortion at the Rectiformer terminal and has better harmonic attenuation capability at the point of common coupling (PCC) by using parallel delta connected (PDC) tertiary winding between two adjacent Rectiformers. The proposed pot line scheme is modeled and simulated using MATLAB/Simulink. A comparison is made with Aluminum Bahrain (ALBA) new 900MW pot line 6 (PL6) scheme in terms of harmonic elimination, capability, operational constrains and cost/space requirements.
Volume: 9
Issue: 4
Page: 1573-1583
Publish at: 2018-12-01

Linear Phase FIR Low Pass Filter Design Based on Firefly Algorithm

10.11591/ijece.v8i6.pp4356-4365
Moath Sababha , Mohamed Zohdy
In this paper, a linear phase Low Pass FIR filter is designed and proposed based on Firefly algorithm. We exploit the exploitation and exploration mechanism with a local search routine to improve the convergence and get higher speed computation. The optimum FIR filters are designed based on the Firefly method for which the finite word length is used to represent coefficients. Furthermore, Particle Swarm Optimization (PSO) and Differential Evolution algorithm (DE) will be used to show the solution. The results will be compared with PSO and DE methods. Firefly algorithm and Parks–McClellan (PM) algorithm are also compared in this paper thoroughly. The design goal is successfully achieved in all design examples using the Firefly algorithm. They are compared with that obtained by using the PSO and the DE algorithm. For the problem at hand, the simulation results show that the Firefly algorithm outperforms the PSO and DE methods in some of the presented design examples. It also performs well in a portion of the exhibited design examples particularly in speed and quality.
Volume: 8
Issue: 6
Page: 4356-4365
Publish at: 2018-12-01

Through the Wall, Recognize Moving Targets Based on Micro-Doppler Signatures

10.11591/ijece.v8i6.pp5227-5237
Thamir Rashed Saeed , Mahmuod Hamza Al-Muifraje , Ghufran M. Hatem
Radar is a promising device for detection and recognition of invisible moving objects, Where, the micro-Doppler frequency shift caused by moving the object's parts have been represented as an attractive feature in the recognition process. In spite of that, no thorough analysis of human movement by bicycle and no discriminate from the running one through the wall in the literature. This paper presents a mathematical model of bicycle movement, then, the recognition of moving objects through the wall. Where three human movements; walking, running and on a bicycle have been recognized through two types of wall wood and cork. The theoretical analysis and measured was given a recognition 98.7% for human walking on his feet, 99% of the passenger on a bicycle, and 98% of the person running have been achieved without walls. While, a 95.4%, 96.2%, and 95% recognition have been gained from walking, moving by bicycle and running with wooden wall and 94%, 94.8%, and 93.3% respectively with cork wall. 2.4 GHz as a detector and SVM as classifier are used.
Volume: 8
Issue: 6
Page: 5227-5237
Publish at: 2018-12-01

Simple Measurement System for Biological Signal Using a Smartphone

10.11591/ijece.v8i6.pp4157-4163
Ryoichi Miyauchi , Koichi Tanno , Hiroki Tamura
This paper describes simple measurement system for biological signal using smartphone. The proposed system consists of an instrumentation amplifier, a filter and an AC/DC converter. The biological signal is converted to the digital data through the microphone terminal with A/D converter in the smartphone. In many cases, the circuits require the power sources such as the cell batteries, however, the proposed system is supplied the power through the earphone terminal of the smartphone. Therefore, the proposed system no require the batteries. The software of this system parallelizes the processing so that the earphone output and the microphone terminal can be executed at the same time. The proposed system was verified through the measurement of surface electromyogram using discrete parts and iOS. Results of experimentation, the proposed system was operating correctly.
Volume: 8
Issue: 6
Page: 4157-4163
Publish at: 2018-12-01

An Opportunity for Values Education in Higher Education: Social Responsibility and Healthy Living Course

10.11591/ijere.v7i4.14768
Gökhan Izgar
The purpose of this study is to determine the contribution of the “social responsibility and healthy living” course, which was put into effect at a state university for the first time in Turkey, within the scope of elective courses on students’ acquisition of values. The data in this study, in which action research, one of the qualitative research designs, was conducted, were obtained using the semi-structured interview form prepared by the researcher. The data obtained were analyzed using the descriptive analysis and content analysis techniques, which are qualitative data analysis methods. 39 students participated in the study on a voluntary basis. As a result of the analysis of the data, it was concluded that the action plan developed within the scope of the social responsibility and healthy living course was effective in the acquisition of values of taking responsibility, charitableness, being useful, ethics, empathy, importance of the institution of family, cooperation-solidarity, patience, gratitude (thankfulness), freedom of thought and respect for differences. Likewise, some of the students stated that this course contributed to their views and behaviors concerning healthy living. However, a considerable number of students were of the opinion that either the course did not make a contribution or made a partial contribution. In addition, the students pointed out that the way the course was taught was fruitful and practice-based,, that it was fun and informative and that the projects and readings contributed to learning. Yet, there were also negative student views about the course content and the method of teaching employed. Moreover, it was important that a theme emerged indicating that class hours were not sufficient.
Volume: 7
Issue: 4
Page: 331-340
Publish at: 2018-12-01

A Miniaturized Patch Antenna Designed and Manufactured Using Slot's Technique for RFID UHF Mobile Applications

10.11591/ijece.v8i6.pp5134-5143
Younes El Hachimi , Yassine Gmih , El Mostafa Makroum , Abdelmajid Farchi
In this research work, a novel compact antenna with rectangular slots is presented for radio frequency identification (RFID) handled applications in the ultrahigh frequency (UHF) band that can be manufactured and integrated into RFID readers without difficult. A prototype demonstrating the aforementioned features was constructed and measured. The proposed antenna is fed by 50-Ω coaxial cable and printed on a 1.6mm thick FR4 substrate which has a small size and occupies a volume of 68×66 ×1.6mm3. The patch, the feed-line and ground plane are made of PEC (Perfect Electric Conductor) with a thickness of 0.035 mm. Measured results indicate that the proposed antenna has a good impedance matching characteristic ranging from 889 to 939MHz, which covers the USA RFID-band (902–928MHz), the Chinese RFID-operating-band (920–924.5MHz), and the Korea and Japan RFID-band (917–923.5MHz). These results were achieved by the insertion of slots in the compact structure of the antenna. The electromagnetic simulators HFSS (High Frequency structure simulator) and CST (Computer Simulation Technology) microwave studio were used for the design, modeling and simulation of the antenna. The focus of the study of our antenna was on the parameters of return loss, bandwidth, Voltage Standing Wave Ratio (VSWR), input impedance and gain.
Volume: 8
Issue: 6
Page: 5134-5143
Publish at: 2018-12-01

Efficiency Performances of Two MPPT Algorithms for PV System With Different Solar Panels Irradiancess

10.11591/ijpeds.v9.i4.pp1755-1764
Ali Abdulwahhab Abdulrazzaq , Adnan Hussein Ali
A main source of current renewable energy is solar energy. This source of renewable energy can be converted to electrical energy using solar photovoltaic (PV) cells. The Maximum Power Point Tracking (MPPT) earns for maximum energy extractor from PV panels by different irradiance levels. In this paper, overall efficiency of most two popular MPPT techniques utilized in PV applications are analyzed, these  algorithms are Perturb and Observe (P&O) and Incremental Conductance (INC). An analysis of the results for the algorithms based on MATLAB simulation for various changes in solar irradiance is performed. Results showed that the efficiency of P&O algorithm was higher than that of the INC, but to obtain the same performance for both, more concentrated calculations should be used for INC. In measuring the output power, current and voltage responses, the use of a solar array having constant and variable irradiations was employed as input for the algorithms. The output waveforms which were derived from a simulation run for the purpose of obtaining the algorithms response to changes in solar array irradiations were compared. In general, the consequences of the P&O algorithm are quiet good and adequate. However, there is a need to improve the algorithm so as to satisfy the requirements of face confident timing in addition to its rapid response so as to make its performance better than that of InCond algorithms.
Volume: 9
Issue: 4
Page: 1755-1764
Publish at: 2018-12-01

Effect of Chirality and Oxide Thikness on the Performance of a Ballistic CNTFET

10.11591/ijece.v8i6.pp4941-4950
Asma Laribi , Ahlam Guen Bouazza
Since the discovery of 1D nano-object, they are constantly revealing significant physical properties. In this regard, carbon nanotube (CNT) is considered as a promising candidate for application in future nanoelectronics devices like carbon nanotube field effect transistor (CNTFET). In this work, the impact of chirality and gate oxide thikness on the electrical characteristics of a CNTFET are studied. The chiralities used are (5, 0), (10, 0), (19, 0), (26, 0), and the gate oxide thikness varied from 1 to 5 nm.This work is based on a numerical simulation program based on surface potential model. CNTFET Modeling is useful for semiconductor industries for nano scale devices manufacturing. From our results we have observed that the output current increases with chirality increasing.We have also highlight the importance of the gate oxide thickness on the drain current that increases when gate oxide is thin.
Volume: 8
Issue: 6
Page: 4941-4950
Publish at: 2018-12-01

Reversible Multiple Image Secret Sharing Using Discrete Haar Wavelet Transform

10.11591/ijece.v8i6.pp5004-5013
Ashwaq T. Hashim , Suhad A. Ali
Multiple Secret Image Sharing scheme is a protected approach to transmit more than one secret image over a communication channel. Conventionally, only single secret image is shared over a channel at a time. But as technology grew up, there is a need to share more than one secret image. A fast (r, n) multiple secret image sharing scheme based on discrete haar wavelet transform has been proposed to encrypt m secret images into n noisy images that are stored over different servers. To recover m secret images r noise images are required. Haar Discrete Wavelet Transform (DWT) is employed as reduction process of each secret image to its quarter size (i.e., LL subband). The LL subbands for all secrets have been combined in one secret that will be split later into r subblocks randomly using proposed high pseudo random generator. Finally, a developed (r, n) threshold multiple image secret sharing based one linear system has been used to generate unrelated shares. The experimental results showed that the generated shares are more secure and unrelated. The size reductions of generated shares were 1:4r of the size of each of original image. Also, the randomness test shows a good degree of randomness and security.
Volume: 8
Issue: 6
Page: 5004-5013
Publish at: 2018-12-01

Economical and Reliable Expansion Alternative of Composite Power System under Restructuring

10.11591/ijece.v8i6.pp4790-4799
Ali S. Dalabeeh , Anwar Almofleh , Abdallah R Alzyoud , Hindi T. Ayman
The paper intends to select the most economical and reliable expansion alternative of a composite power system to meet the expected future load growth. In order to reduce time computational quantity, a heuristic algorithm is adopted for composite power system reliability evaluation is proposed. The proposed algorithm is based on Monte-Carlo simulation method. The reliability indices are estimated for system base case and for the case of adding peaking generation units. The least cost reserve margin for the addition of five 20MW generating units sequentially is determined. Using the proposed algorithm an increment comparison approach used to illustrate the effect of the added units on the interruption and on the annual net gain costs. A flow chart introduced to explain the basic methodology to have an adequate assessment of a power system using Monte Carlo Simulation. The IEEE RTS (24-bus, 38-line) and The Jordanian Electrical Power System (46-bus and 92-line) were examined to illustrate how to make decisions in power system planning and expansions.
Volume: 8
Issue: 6
Page: 4790-4799
Publish at: 2018-12-01

The Improved Hybrid Algorithm for the Atheer and Berry-Ravindran Algorithms

10.11591/ijece.v8i6.pp4321-4333
Atheer Akram Abdul Razzaq , Nur’Aini Abdul Rashid , Alaa Ahmed Abbood , Zurinahni Zainol
Exact String matching considers is one of the important ways in solving the basic problems in computer science. This research proposed a hybrid exact string matching algorithm called E-Atheer. This algorithm depended on good features; searching and shifting techniques in the Atheer and Berry-Ravindran algorithms, respectively. The proposed algorithm showed better performance in number of attempts and character comparisons compared to the original and recent and standard algorithms. E-Atheer algorithm used several types of databases, which are DNA, Protein, XML, Pitch, English, and Source. The best performancein the number of attempts is when the algorithm is executed using the pitch dataset. The worst performance is when it is used with DNA dataset. The best and worst databases in the number of character comparisons with the E-Atheer algorithm are the Source and DNA databases, respectively.
Volume: 8
Issue: 6
Page: 4321-4333
Publish at: 2018-12-01

Bidirectional Underwater Visible Light Communication

10.11591/ijece.v8i6.pp5203-5214
Arsyad Ramadhan Darlis , Andre Widura , Muhamad Rifan Andrian
In this paper, a novel bidirectional underwater visible light communication (BiUVLC) is proposed. The VLC transmitter transmits an information signal using the one of RGB LED through the water tank that represents an underwater environment and then is received by VLC receiver via a color filter. The color LEDs and color filters are utilized in bidirectional systems. The single link is created by a LED on the transmitter and the color filter on the receiver with the same color which represents a single wavelength. The performance of the proposed BiUVLC system was evaluated via implementations. The experimental result shows that the transmitted signal undergoes attenuation over the underwater optical channel and the pair of the blue wavelength in link 1 and the green wavelength in link 2 have the best performance than the other wavelength pair. In the crosstalk measurement, the red wavelength color is the worst in the underwater environment.
Volume: 8
Issue: 6
Page: 5203-5214
Publish at: 2018-12-01
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