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  Subjects -> ELECTRONICS (Total: 202 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advanced Materials Technologies     Hybrid Journal  
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 9)
Advances in Electronics     Open Access   (Followers: 99)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Power Electronics     Open Access   (Followers: 39)
Advancing Microelectronics     Hybrid Journal  
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 28)
Annals of Telecommunications     Hybrid Journal   (Followers: 9)
APSIPA Transactions on Signal and Information Processing     Open Access   (Followers: 9)
Archives of Electrical Engineering     Open Access   (Followers: 15)
Australian Journal of Electrical and Electronics Engineering     Hybrid Journal  
Batteries     Open Access   (Followers: 9)
Batteries & Supercaps     Hybrid Journal   (Followers: 4)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 31)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 2)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 47)
China Communications     Full-text available via subscription   (Followers: 9)
Chinese Journal of Electronics     Hybrid Journal  
Circuits and Systems     Open Access   (Followers: 15)
Consumer Electronics Times     Open Access   (Followers: 5)
Control Systems     Hybrid Journal   (Followers: 304)
ECTI Transactions on Computer and Information Technology (ECTI-CIT)     Open Access  
ECTI Transactions on Electrical Engineering, Electronics, and Communications     Open Access   (Followers: 2)
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 123)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 108)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 103)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elkha : Jurnal Teknik Elektro     Open Access  
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage     Hybrid Journal   (Followers: 1)
Energy Storage Materials     Full-text available via subscription   (Followers: 4)
EPE Journal : European Power Electronics and Drives     Hybrid Journal  
EPJ Quantum Technology     Open Access   (Followers: 1)
EURASIP Journal on Embedded Systems     Open Access   (Followers: 11)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (Followers: 6)
Foundations and Trends® in Signal Processing     Full-text available via subscription   (Followers: 10)
Frequenz     Hybrid Journal   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 1)
IACR Transactions on Symmetric Cryptology     Open Access   (Followers: 1)
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 100)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 81)
IEEE Embedded Systems Letters     Hybrid Journal   (Followers: 56)
IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology     Hybrid Journal   (Followers: 2)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 52)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 9)
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits     Hybrid Journal   (Followers: 1)
IEEE Letters on Electromagnetic Compatibility Practice and Applications     Hybrid Journal   (Followers: 3)
IEEE Magnetics Letters     Hybrid Journal   (Followers: 7)
IEEE Nanotechnology Magazine     Hybrid Journal   (Followers: 42)
IEEE Open Journal of Circuits and Systems     Open Access   (Followers: 2)
IEEE Open Journal of Industry Applications     Open Access   (Followers: 2)
IEEE Open Journal of the Industrial Electronics Society     Open Access   (Followers: 2)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 77)
IEEE Pulse     Hybrid Journal   (Followers: 5)
IEEE Reviews in Biomedical Engineering     Hybrid Journal   (Followers: 22)
IEEE Solid-State Circuits Letters     Hybrid Journal   (Followers: 2)
IEEE Solid-State Circuits Magazine     Hybrid Journal   (Followers: 13)
IEEE Transactions on Aerospace and Electronic Systems     Hybrid Journal   (Followers: 364)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 74)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 59)
IEEE Transactions on Autonomous Mental Development     Hybrid Journal   (Followers: 8)
IEEE Transactions on Biomedical Engineering     Hybrid Journal   (Followers: 38)
IEEE Transactions on Broadcasting     Hybrid Journal   (Followers: 13)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 26)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 45)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 19)
IEEE Transactions on Geoscience and Remote Sensing     Hybrid Journal   (Followers: 221)
IEEE Transactions on Haptics     Hybrid Journal   (Followers: 4)
IEEE Transactions on Industrial Electronics     Hybrid Journal   (Followers: 76)
IEEE Transactions on Industry Applications     Hybrid Journal   (Followers: 40)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 27)
IEEE Transactions on Learning Technologies     Full-text available via subscription   (Followers: 12)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 79)
IEEE Transactions on Services Computing     Hybrid Journal   (Followers: 4)
IEEE Transactions on Signal and Information Processing over Networks     Hybrid Journal   (Followers: 14)
IEEE Transactions on Software Engineering     Hybrid Journal   (Followers: 79)
IEEE Women in Engineering Magazine     Hybrid Journal   (Followers: 11)
IEEE/OSA Journal of Optical Communications and Networking     Hybrid Journal   (Followers: 16)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 5)
IET Cyber-Physical Systems : Theory & Applications     Open Access   (Followers: 1)
IET Energy Systems Integration     Open Access   (Followers: 1)
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 35)
IET Nanodielectrics     Open Access  
IET Power Electronics     Hybrid Journal   (Followers: 59)
IET Smart Grid     Open Access   (Followers: 1)
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 18)
IETE Journal of Education     Open Access   (Followers: 4)
IETE Journal of Research     Open Access   (Followers: 11)
IETE Technical Review     Open Access   (Followers: 13)
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems)     Open Access   (Followers: 3)
Industrial Technology Research Journal Phranakhon Rajabhat University     Open Access  
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Instabilities in Silicon Devices     Full-text available via subscription   (Followers: 1)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 13)
International Journal of Advanced Research in Computer Science and Electronics Engineering     Open Access   (Followers: 18)
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems     Open Access   (Followers: 12)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 5)
International Journal of Control     Hybrid Journal   (Followers: 11)
International Journal of Electronics     Hybrid Journal   (Followers: 7)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 13)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal   (Followers: 3)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Hybrid Intelligence     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 16)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 10)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 4)
International Journal of Power Electronics     Hybrid Journal   (Followers: 25)
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 4)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 10)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 4)
International Journal of Wireless and Microwave Technologies     Open Access   (Followers: 6)
International Transaction of Electrical and Computer Engineers System     Open Access   (Followers: 2)
JAREE (Journal on Advanced Research in Electrical Engineering)     Open Access  
Journal of Biosensors & Bioelectronics     Open Access   (Followers: 4)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 12)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 4)
Journal of Computational Intelligence and Electronic Systems     Full-text available via subscription   (Followers: 1)
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 37)
Journal of Electrical Bioimpedance     Open Access  
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electrical Engineering & Electronic Technology     Hybrid Journal   (Followers: 7)
Journal of Electrical, Electronics and Informatics     Open Access  
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 8)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 9)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronic Science and Technology     Open Access   (Followers: 1)
Journal of Electronics (China)     Hybrid Journal   (Followers: 5)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Engineered Fibers and Fabrics     Open Access   (Followers: 2)
Journal of Field Robotics     Hybrid Journal   (Followers: 3)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 181)
Journal of Information and Telecommunication     Open Access   (Followers: 1)
Journal of Intelligent Procedures in Electrical Technology     Open Access   (Followers: 3)
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 10)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 10)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal   (Followers: 1)
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal   (Followers: 3)
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 11)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access   (Followers: 4)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 31)
Journal of Power Electronics     Hybrid Journal   (Followers: 1)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 11)
Journal of Semiconductors     Full-text available via subscription   (Followers: 5)
Journal of Sensors     Open Access   (Followers: 26)
Journal of Signal and Information Processing     Open Access   (Followers: 9)
Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer     Open Access  
Jurnal Rekayasa Elektrika     Open Access  
Jurnal Teknik Elektro     Open Access  
Jurnal Teknologi Elektro     Open Access  
Kinetik : Game Technology, Information System, Computer Network, Computing, Electronics, and Control     Open Access  
Majalah Ilmiah Teknologi Elektro : Journal of Electrical Technology     Open Access   (Followers: 2)
Metrology and Measurement Systems     Open Access   (Followers: 6)
Microelectronics and Solid State Electronics     Open Access   (Followers: 28)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal   (Followers: 1)
Networks: an International Journal     Hybrid Journal   (Followers: 5)
Open Electrical & Electronic Engineering Journal     Open Access  
Open Journal of Antennas and Propagation     Open Access   (Followers: 9)
Paladyn. Journal of Behavioral Robotics     Open Access   (Followers: 1)
Power Electronics and Drives     Open Access   (Followers: 2)
Problemy Peredachi Informatsii     Full-text available via subscription  
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Advances in Communications and Networking Technology     Hybrid Journal   (Followers: 4)
Recent Advances in Electrical & Electronic Engineering     Hybrid Journal   (Followers: 11)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 6)
Revue Méditerranéenne des Télécommunications     Open Access  
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 56)
Semiconductors and Semimetals     Full-text available via subscription   (Followers: 1)
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 2)
Solid State Electronics Letters     Open Access  
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 3)
Synthesis Lectures on Power Electronics     Full-text available via subscription   (Followers: 3)
Technical Report Electronics and Computer Engineering     Open Access  
TELE     Open Access  
Telematique     Open Access  
TELKOMNIKA (Telecommunication, Computing, Electronics and Control)     Open Access   (Followers: 9)
Transactions on Electrical and Electronic Materials     Hybrid Journal   (Followers: 1)
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 7)
Ural Radio Engineering Journal     Open Access   (Followers: 1)
Visión Electrónica : algo más que un estado sólido     Open Access   (Followers: 1)
Wireless and Mobile Technologies     Open Access   (Followers: 6)

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Universal Journal of Electrical and Electronic Engineering
Number of Followers: 7  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2332-3280 - ISSN (Online) 2332-3299
Published by Horizon Research Publishing Homepage  [54 journals]
  • Optimal decision decoding algorithm (ODDA) for an asymmetric TWRC system

    • Abstract: Publication date:  Feb 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  1  Siamack Ghadimi   The relay network has many advantages, such as reliability against failures, and offers redundancy, selfconfiguring, and self-healing. The purpose of his paper is to simulate an Asymmetric Modulation (AM) for wireless Two Way Relay Channel (TWRC) system in the presence of additive white Gaussian noise (AWGN) to compute Bit Error Rate (BER) performance of transmitted data. Finally, by utilizing a novel algorithm, which named Optimal Decision Decoding Algorithm (ODDA) the BER has decreased, and performance of the system improved.
      PubDate: Feb 2020
  • Performance Investigation of Quasi Z Source Inverter (QZSI) Fed Induction
           Motor (IM) Drive System with bGWO-RDF Technique

    • Abstract: Publication date:  Feb 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  1  Shunmugakani P   and D. Kirubakaran   In this dissertation, a hybrid strategy is intended for performance investigation of Quasi Z Source Inverter (QZSI) fed Induction motor (IM) drive system. The hybrid strategy is the fusion of both the binary version of grey wolf optimization (bGWO) and random decision forest (RDF) and commonly called as bGWO-RDF technique. The main contribution of the dissertation is to control the QZSI for enhancing the stability and the performance of IM drive system using the proposed hybrid strategy. The input of the proposed strategy is the speed and three phase current of IM. With the help of input parameters like actual speed and reference speed of IM, the PI controller gain parameters are optimized using bGWO technique. In order to train the RDF, the PI controller output like reference quadrature axis current and actual quadrature axis current is chosen. By utilizing the RDF, the reference three phase current is generated. By utilizing the actual and reference three phase current, the control pulses are generated at the final stage. Finally, the proposed technique is executed in the MATLAB/Simulink working platform. The effectiveness of the proposed is compared with various existing techniques such as ANN, PSO, PSO-SVM and GSA-SVM. The effectiveness of the proposed and other existing techniques is analyzed in terms of ripples and harmonics reduction, rise time, settling time and steady state error. Furthermore, the statistical analysis is also performed and compared with other existing techniques. The comparison result reveals that the total harmonic distortion (THD) is decreased and the oscillation period of the stator current, torque and speed are eliminated.
      PubDate: Feb 2020
  • Simulation and Experimental Investigation of Modulation Techniques for
           BLDC Motor Control

    • Abstract: Publication date:  Feb 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  1  Ivan Maradzhiev   Tsvetana Grigorova   and Emil Dinkov   The following paper investigates and analyses the electromagnetic processes in an electrical drive system composed of a power source, a power inverter and a brushless dc (BLDC) motor using known pulse-width modulation (PWM) methods. Investigated modulation techniques are: unipolar modulation of the upper transistors (PWM-TOP) and bottom transistors (PWM-BOT), symmetrical PWM-PWM, modulation type PWM-ON and ON-PWM, and bipolar PWM-ON modulation indicated with PWM-ON-BIP. The voltage source inverter is considered as DC-DC buck power converter, when BLDC is operated in motor mode. On the basis of summarized equivalent circuits, the analytical expressions are received for the electromagnetic processes in the system by the different modulation techniques. The efficiency of the system battery-inverter-machine for each discussed modulation is experimentally investigated and compared. These results are also compared with the efficiency of the BLDC driven with vector control. A MATLAB/SIMULINK model is proposed to implement these modulations and to analyze the obtained results. From this model, the harmonic composition of the phase currents for each modulation is investigated.
      PubDate: Feb 2020
  • MATLAB-Based GPU Acceleration for Multiple-Input and Multiple-Output Radar
           Beamforming Algorithm

    • Abstract: Publication date:  Feb 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  1  Mostafa Hefnawi   and Gillian Rideout   Multi-input and multi-output (MIMO) radar systems possess numerous advantages, such as scanning an entire region much faster than a phased array, enhancing the spatial resolution, mitigating interference and multipath fading, and improving the probability of detection of targets. MIMO radar systems use adaptive beamforming techniques such as the minimum variance distortionless response (MVDR) to obtain the best possible estimation of the direction of arrival (DOA) of the targets. The MVDR algorithm has been thoroughly investigated for traditional phased array radars. For MIMO radar systems, however, it requires significant signal processing, which can introduce substantial latency, especially in the case of large MIMO systems where few hundred antennas are used; this can be solved by using a Graphics Processor Unit (GPU), which contains thousands of cores and can execute many operations in parallel. This paper presents a MATLAB-based approach for GPU parallelization of the minimum variance distortionless (MVDR) beamforming algorithm in a MIMO radar system. Two MIMO radar systems are considered. The first one is a simulated MIMO radar which is used for automotive adaptive cruise control (ACC), and the second one is an experimental monostatic MIMO radar that is based on a vector network analyzer (VNA). It is shown that the GPU achieved a speedup of up to 7 times while successfully detecting all targets.
      PubDate: Feb 2020
  • Design and Control of V2G to Enhance System Voltage Stability

    • Abstract: Publication date:  Feb 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  1  Shazly A. Mohamed   This paper presents a vehicle to grid (V2G) which regulates the charging & discharging between the electric vehicles (EVs) and test systems in order to aid with peak power and system voltage stability. Allowing electric vehicles to charge/discharge without any control technique may lead to variations of the voltage & disturbances to the utility grid, but when the charging/discharging of the electric vehicles is achieved in a smart way, they can support the power grid. In this work, fuzzy techniques are applied to control the power flow among the grid and the EVs. The work introduced in this paper mainly concentrates on the control technique for a V2G system which allows for using electric vehicles batteries to assist the grid voltage stability. The designed controllers maintain the node voltage and achieve peak power. The proposed controllers are tested on (16&6) generator test systems to check the performance of the suggested designs. Two fuzzy schemes are examined to explain the vehicle to grid ability to impact system voltage stability. The main contributions of this paper, fuzzy technique based control tool for vehicle to grid illustrate at a weak bus in the system and comparison of chargers producing active vs. reactive powers.
      PubDate: Feb 2020
  • Ground Moving Target Imaging (GMTIm) Algorithm in OFDM SAR Based on
           First-Order Keystone Transform

    • Abstract: Publication date:  Apr 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  2  Mohammad Zeighami   Mohammad Hassan Bastani   and Fereidoun Behnia   The use of Orthogonal Frequency Division Multiplexing (OFDM) waveform in place of Linear Frequency Modulation (LFM) signal is one of the latest topics in the field of Synthetic Aperture Radar (SAR) imaging. The advantages of imaging by this technique include resistance to certain types of radar jamming techniques, reduced ambiguity in Doppler spectrum with an increase in the number of sub-bands, and extraction of target phase history based on phase approximation of all OFDM subcarriers. In conventional SAR imaging algorithms, it is assumed that the targets are stationary in the imaging zone as these algorithms do not have the required efficiency to image moving targets, leading to blurred images and high Integrated Side Lobe Ratio (ISLR). To circumvent these problems, there is a requirement of designing appropriate imaging algorithms, keeping in mind the important issues related to the moving targets in the imaging zone. Thus, in this study, we propose the implementation of the OFDM waveform for imaging moving targets alongside the first-order keystone transform to solve the above-mentioned problems.
      PubDate: Apr 2020
  • Performance Study and Synthesis of the New LDPC Error Correcting Code
           Using the Bit-Flipping Algorithm

    • Abstract: Publication date:  Apr 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  2  Lagrini Lakbir   El Habti Idrissi Anas   and Moulay Brahim Sedra   The discovery in 1993 of the turbo codes Berrou C., A. and P. Glavieux Thitimajshima at the International Conférence of Communication Florida has revolutionized communication. This innovation made it possible to rediscovery the error correcting codes invented by Robert Gallager in 1963 and rediscovered by Mackay in 1995, currently called Low Density Parity Check (LDPC). This code is one of the error correction codes introduced by the transmission channel that have the fastest and most effective level of protection and correction of the information transmitted during the communication. This code has been almost generalized in communication standards such as satellites. The objective of our article is to minimize the number of iterations and in some cases completely remove the iteration produced by the LDPC code bit flipping algorithm. The result of this algorithm, if we take for example the LDPC code (n, k), the number of possible syndromes which we can find is 2k-1 and for each syndrome different from zero, we can do almost four iterations to correct the errors, which gives 4x(2k-1) iterations in totality. On the other hand, the proposed algorithm removes the iteration for k syndromes and reduces iterations for the rest of the cases from four to two iterations. This study of the new design gave more performance results and the results of the simulation below according to a hardware description language used in digital electronics using quartus software tools show the importance of this algorithm.
      PubDate: Apr 2020
  • PCA Data Reduction for MIMO Based Channel, Capacity Enhancement Using
           16-QAM Modulation

    • Abstract: Publication date:  Apr 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  2  Panem Charan Arur   Deepak Chodankar   Rajendra S. Gad   and G. M. Naik   In the Modern Wireless Communication Systems, there is a direct need for the enhancement of the network capacity, in order to support more and more data. This paper describes the data reduction methodology for enhancement of channel capacity based on Principal Component Analysis (PCA) of the Multiple-Input-Multiple-Output (MIMO) based untether communication system. The communication system has employed 16 Quadrature Amplitude Modulation (16-QAM) scheme with LDPC for channel coding method for error correction. The proposed method here utilizes the Principal Component Analysis (PCA) for data reduction which transmits only the feature vectors i.e. Eigen Vector for the set of composite data for large numbers of signals data over time-stamped. The effectiveness of the proposed work is evident through the simulation results of the systems incorporating 1×1, 2×2, 3×3, 4×4 MIMO networks. We have presented RMSE analysis for the PCA regression for verification of the signal fidelity and the BER for confirmation of the recovery of the data over MIMO channel over LDPC coding. Here we observe that our proposed work has achieved much better results.
      PubDate: Apr 2020
  • Nonvolatile Memory Cell Based on Memristor

    • Abstract: Publication date:  Apr 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  2  Santosh Parajuli   Ram Kaji Budhathoki   and Hyongsuk Kim   Memristor, one of the fundamental circuit elements, has promising applications in non-volatile memory and storage technology as it can theoretically achieve infinite states. Information can be stored independently in these states and retrieved whenever required. In this paper, we have proposed a non volatile memory cell based on memristor emulator. The circuit is able to perform read and write operations. In this memristor based memroy cell, unipolar pulse is used for writing and bipolar pulse is used for reading. Unlike other earlier designs, the circuit does not need external read/write enable switches to switch between read and write operations; the switching is achieved by the zero average bipolar read pulse given after the completion of write cycle. In our proposed memristor based memory cell, single bit can be read and any voltages from 0 to 5 volts can be written. Mathematical analysis and the simulation results of memristor emulator based read write circuit have been presented to confirm its operation.
      PubDate: Apr 2020
  • Cepstrum Multitaper Method for Optimal Detection of Cognitive Radio

    • Abstract: Publication date:  Apr 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  2  Hebat Allah O. Selim   and Waheed Sabry   Multitaper method (MTM) is an unpopular method that used for spectrum detection. MTM is a good candidate to detect spectrum holes in cognitive radio networks. MTM is accurate, efficient and reliable technique. Cepstrum MTM is described as an effective tool for variance reduction beside its ability in increasing spectrum dynamic range (SDR) due to its isolation property which can be applied to the multiplied mixed signals. As a matter of fact, introducing cepstrum with MTM has achieved better detection performance with the available constraints. In this paper, an algorithm is prepared as a cepstrum MTM for optimal detection and applied to cognitive radio networks. Simple and computationally efficient mathematical expressions of the mean and variance were derived. A closed form expression for the probability of detection (Pd) and false detection (Pf) were obtained accordingly. Analysis of the suggested MTM based cepstrum detection is provided. Different aspects of spectrum sensing parameters were considered in the simulation. A receiver operating characteristic curve is tested where there is a relation between Pd and Pf. The required sample size to achieve certain detection, and the relation of Pd versus signal to noise ratio were also verified. Simulation results were obtained under different affecting factors of the proposed scheme such as probability of false alarm, number of sample points (N), and number of tapers (K). Simulation results reveal that the proposed detector outperforms conventional available tools at the worst scenario operating conditions. The proposed scheme outperforms convention MTM and energy detection by 20% and 45% respectively.
      PubDate: Apr 2020
  • Structural-Parametric Synthesis of an Adaptive Fuzzy-Logical System

    • Abstract: Publication date:  Apr 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  2  Siddikov Isamiddin Xakimovich   Umurzakova Dilnoza Maxamadjonovna   and Yadgarova Dilnoza Baxtiyarovna   One of the ways to improve the quality of the process of managing dynamic objects, in the presence of various types of uncertainty of external and internal factors, due to insufficient information about the object and useful signals and noise acting on it, is to develop new and improve existing methods and algorithms for solving problems of structurally parametric synthesis of neuro-fuzzy control systems that can significantly expand the capabilities of dynamic systems. An analysis of existing approaches showed that at present, traditional methods of controlling the absorption process do not meet modern requirements, due to the lack of a system analysis of the entire set of control systems as a whole, the structure of the system and the relationship between its functional elements, etc. The aim of the work is to create an automatic control system dynamic object, allowing to overcome the difficulties associated with the non-stationary process, structural and parametric uncertainty and variability of external influences. A technique for the synthesis of a high-speed control algorithm based on fuzzy-logical inference is proposed, which allows to eliminate empty and zero solutions when determining the architecture and calculating the weights of arcs of a neural network. To correct the parameters and structure of the fuzzy-logical controller, an adaptation block is proposed in the control system loop. The originality of the proposed synthesis method is to ensure high speed of finding control actions due to the possibility of eliminating the redundancy of computational procedures associated with discarding empty and zero solutions in the formation of control devices when choosing the architecture of a neural network and calculating synapse weights. The proposed structural-parametric adaptation algorithm in the process control problems allows to reduce the number of iterations in the process of network training, to reduce the error in the calculation of control values 8 to 1%.
      PubDate: Apr 2020
  • Investigation of Power Losses by Various Brushless Motor Modulation
           Methods in Motor Mode

    • Abstract: Publication date:  Apr 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  2  Ivan Maradzhiev   Tsvetana Grigorova   and Emil Dinkov   The paper presents a comparative analysis of different modulation techniques for BLDC motor control in terms of several types of losses in the system inverter – BLDC motor in motor mode. The experimental investigated modulation strategies are: unipolar modulation of upper (PWM-TOP or UT) transistors, a bipolar PWM-ON modulation (PWM-ON-BIP), a symmetrical modulation (PWM-PWM), a vector control and non-modulation mode. A simple equivalent circuit for the BLDC motor is used to calculate different losses and the system efficiency. On the basis of the equivalent circuit for the different modulation techniques, simple design procedures are discussed for the determination the eddy current and mechanical viscous loss, the copper loss, the hysteresis and mechanical friction loss, the voltage-drop loss of the inverter transistor and diode. Loss distribution experimental data for the brushless DT4260 motor when operating with different modulations and load torque are presented. On the basis of the obtained values for the efficiency of the studied modulations, references for use in battery powered devices such as electric vehicles, electric scooters and more are made.
      PubDate: Apr 2020
  • A Combined WU-shaped NRI Metamaterial for Dual Band Microwave Application

    • Abstract: Publication date:  Apr 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  2  Krishnan Sinha   Sikder Sunbeam Islam   and Mohammad Jakir Hossain   In the field of electromagnetism, artificially constructed metamaterial has opened a new hope for the researchers. Metamaterial is developed artificially and not found available in nature. This composite material shows more irregular properties than the natural materials. Negative refractive index (NRI) is one of the exceptional properties of it. Therefore, many researchers have started investigation with this material. Some metamaterials found in literature have NRI properties but very few of them are found operating simultaneously in C-and X-band. In this study, a new combined WU-shaped NRI metamaterial unit cell is presented. Here, three different substrate materials have been adopted for sensitivity analysis. The used substrate materials are FR-4, Rogers RT6006 and Rogers RT6010 and their permittivity are 4.3, 6.15 and 10.2 respectively. Finite integration technique based numerical tool is adopted for all analyses. The electromagnetic properties are determined by Nicolson-Ross-Weir (NRW) method. Perfect electric-magnetic boundary condition is applied for simulation. The metamaterial unit cell exhibits negative refractive index (NRI) within C-band and X-band for all these substrate materials. C-and X-band are widely used for satellite and long distance communication. Moreover, the proposed material shows better effective medium ratio with increasing relative permittivity which ensures the materials proper operation and sensitivity for any applications.
      PubDate: Apr 2020
  • Improvement of the PSO Algorithm to Solve the Nonlinear Economic Dispatch
           Problem with a New Local Search Algorithm

    • Abstract: Publication date:  Apr 2020
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  7  Number  2  Mohammad Reza Gholami Dehbalaee   Gholam Hossein Shayci   and Majid Valizadeh   This paper suggests a new PSOHHC algorithm for solving the economic dispatch (ED). This algorithm was created by integrating two algorithms: PSO (particle swarm optimization) algorithm, an evolutionary algorithm based on collective intelligence, and a new search algorithm for HHC (Hybrid Hill Climbing) which is based on searching. The aim of presenting this algorithm is to improve the performance of the PSO algorithm in terms of convergence to achieve the best possible solution with the required accuracy. This new algorithm is able to improve the responses obtained from the PSO algorithm with a controllable local search. The most important goal of economic dispatch is the optimal allocation of each generator's contribution to provide the load and reduce the costs of active units in the power system. This is generally due to the nonlinear factors and limitations, such as: the effect of steam inlet valve (valve point effect (VPE)), the balance between the production and consumption of the system, the prohibited operating zones (POZS), production limits, slope rate, and lines' losses. This algorithm is implemented on 3 test systems of 13 units, 31 units and 40 units with different operating conditions, independently and also in combination with the PSO evolutionary algorithm, and simulation results illustrate the efficiency of this algorithm in solving ED problems.
      PubDate: Apr 2020
  • Mobility-aware IMU-based Energy Efficient Routing Protocol for UWSN

    • Abstract: Publication date:  Oct 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  4  Muhammad Tayyab   Abdul Hanan Bin Abdullah   and Mohd. Murtadha Bin Mohamad   Underwater Wireless Sensor Network (UWSN) is one of the promising technologies having a wide range of applications, which includes underwater natural resources exploration, marine life study and underwater pipeline monitoring. Due to the harsh underwater environment, it is very challenging to provide an energy-efficient mobility-aware routing protocol for data collection. Due to the regular movement of the water currents, it becomes difficult to design a routing protocol that manages mobility of sensor nodes without the need of the localization details and with minimum energy utilization. Another issue of the UWSN is how to efficiently detect and avoid void nodes in a void area. The effect of the void node during routing increases energy utilization of the sensor nodes, which leads to decrease in the network lifetime and packet delivery ratio. In this paper, a Mobility-aware IMU-based Energy Efficient Routing (MIER) protocol for UWSN has been proposed to address issues including i) higher transmission overhead due to flooding of localization information exchange ii) and void node occurrence that leads to higher energy utilization and packet loss. The opportunistic data forward approach has been employed for the node communication. Extensive simulation has been carried out and the results show that MIER outperforms existing related research work in terms of end-to-end delay, packet delivery ratio and network lifetime.
      PubDate: Oct 2019
  • A Distributed Wireless Heat Monitoring System for Early-Fire Detection and

    • Abstract: Publication date:  Oct 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  4  Moses Oluwafemi Onibonoje   Adedayo Olukayode Ojo   and Temitayo Emmanuel Fabunmi   Fire outbreak contributes greatly to loss of lives, properties and valuables. In order to avert such losses, reliable fire detection, notification, and prevention systems are crucial. Heat, the common indicator for fire development, requires to be monitored and controlled in a flammable environment. This paper has therefore developed a distributed approach to the detection and prevention of fire development by monitoring the inducing heat, smoke and early fire. The study proposes a model for the heat sensing and also for the control function of the system. It designs and implements the four sensing nodes, one base node, and the control and alarm system with resourceful hardware devices. The heat and smoke status of the environment is relayed for prompt action through a local user window on the administrator's personal computer (PC) and mobile phone. The local user interfaces and the internet cloud are designed for data relay and recording. The system is tested and evaluated for real-time deployment and operations. The resulting data are analyzed and reported.
      PubDate: Oct 2019
  • Electric Vehicles Inductive Power Transfer System Modeling, Simulation and

    • Abstract: Publication date:  Oct 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  4  Nedaa N. Gaafar   and Waheed Sabry   Till the moment, electric vehicles charging statically using stationary stations, microgrids or other known conventional methods still represents a big problem for this industry, and a worrying snag to users. Due to different problems of electric vehicles charging using static methods, most of recent electric vehicles' researches are interested in the subject of charging these vehicles using inductive power transfer (IPT) or the so-called dynamic charging. This method depends mainly on transformer theory. In this paper, an IPT system is proposed, modeled in state-space form, simulated using MATLAB package and analyzed. The IPT system analysis focused on calculating one of the main system parameters - magnetic coupling coefficient and finding its optimal value. At this value, the transient dynamic voltage and current response of the circuit is found. Also, a fractional order proportional-integral-derivative (FO-PID) controller is proposed to enhance and smoothen the power signals (Voltage and current).
      PubDate: Oct 2019
  • Measurement and Analysis of Optical Characteristics of Silicon Solar Cell
           Using Integrating Sphere

    • Abstract: Publication date:  Oct 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  4  P. S. Manoharan   V. Shanmugapriya   and P. Deepamangai   The aim of this paper is to analyze the optical parameters of solar cell materials using the integrating sphere. The optical parameters including reflectance, transmittance, absorptance and emissivity are measured for the samples ZnO with 0.025 M concentration, ZnO with 0.05 M concentration, ZnO with 0.1 M concentration and Cu/Ti/SiO2 with 0.025 M concentration. The transmittance and reflectance of the samples are calculated with respect to the wavelengths to find whether the samples absorb light of the portion of the solar spectrum. These optical characteristics are measured by using integrating sphere and this work will lead to the analysis of quality of material used for coating the photovoltaic cell in order to increase the conversion efficiency of photovoltaic system.
      PubDate: Oct 2019
  • THD Reduction Using Shunt Active Power Filter: A Real Case Study

    • Abstract: Publication date:  Oct 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  4  Lina Alhmoud   Harmonic pollution in the industrial field causes extra heat dissipation and increased rms (root mean square) values of both voltage and current waveforms, which hence increase losses, decrease the overall efficiency, and increase the energy cost in power plants. Moreover, harmonic pollution results in a decline in industrial investment. A solution to mitigate harmonic pollution is proposed using an active power filter by identifying both the phase current and the voltage and then providing a compensation current the same in magnitude and negative in direction to the distorted current. In this paper, a three-phase active power filter for current harmonic compensation in power distribution lines is adopted. Practical measurements performed on the United Iron and Steel Manufacturing Company bus bar for different factory and Jordanian national power system grid loads demonstrate the validity of the proposed approach using a shunt active power filter (SAPF). Using p-q theory, the results show that the proposed SAPF is convenient for suppressing harmonic current. Hence, the overall power quality of the grid is improved, and the reliability is enhanced. Finally, this work is implemented using simulink/Matlab.
      PubDate: Oct 2019
  • Reconfigurable Antennas and Their Applications

    • Abstract: Publication date:  Oct 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  4  Harish Chandra Mohanta   Abbas Z. Kouzani   and Sushanta K. Mandal   Reconfigurable antennas are capable of dynamically altering their frequency, polarization, and radiation properties in a controlled and reversible manner. They modify their geometry and behaviour to maximize the antenna performance in response to changes in their surrounding conditions. To implement a dynamical response, they employ different mechanisms such as PIN diodes, varactors, radio-frequency microelectromechanical systems (RF-MEMS), field effect transistors (FETs), parasitic pixel layers, photoconductive elements, mechanical actuators, metamaterials, ferrites, and liquid crystals. These mechanisms enable intentional distribution of current on the antenna surface producing reversible modification of their properties. This paper presents the design process and applications of reconfigurable antennas. The activation mechanisms of reconfigurable antennas, and their design and operation optimization are discussed. The latest advances on reconfigurable metamaterial engineering, and the current trends and future directions relating to reconfigurable antennas are reviewed. Finally, the applications of reconfigurable antennas in cognitive radio, multi-input multi-output (MIMO) systems, satellite communications, and biomedical devices are highlighted.
      PubDate: Oct 2019
  • Design of an Optimum Single Phase Inverter for a Grid Tie PV System

    • Abstract: Publication date:  Oct 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  4  Ibtissem Tiss   Abdulrahman Alahdal   Kaiçar Ammous   and Anis Ammous   Power converter optimization by genetic algorithm (GA) is used to provide simpler and more reliable converter design for high efficiency, small size and low cost. This paper presents a Computer-Aided Design Optimization Tool based on GA to determine the optimal structure of single-phase voltage source inverter devoted to grid-connected photovoltaic applications. An accurate non-linear averaged model was used to model the power converter. The hysteresis technique was used to control the output sine wave current of the inverter while the Elitist Non-dominated Sorting Genetic Algorithm NSGA-II was used to search the Pareto optimal front and the best design in terms of efficiency, volume and cost under electrical constraints. The converter model and the NSGA-II algorithm are developed in the MATLAB/Simulink environment. The problem formulation was detailed. It was shown that the optimization of a power converter, working in a given application without the need of tedious and expensive experimental tests classically used to build this converter, is possible by mean of simulation. This will decrease time to market phase for manufacturers.
      PubDate: Oct 2019
  • Intermediate Programming Methodologies for Manipulating Modern Humanoid

    • Abstract: Publication date:  Oct 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  4  Wright J. R., Jr.   Ginter E. S.   David B. G.   Kilbourne B. J.   and Wells J. R.   The future for robotics in today's world is clear. We must automate our manufacturing processes to remain competitive in the global marketplace. Modern robotics is an important part of that automation. Humanoids, a more recent development in robotics, have a host of capabilities that may reveal potential new uses in industry and modern engineering education. This paper describes how one may advance from a beginning user of an NAO robot to that of an intermediate user of the Choregraphe development software. The authors seek to bridge the gap between the available documentation for the novice and the advanced users/programmers of the NAO humanoid platform within the Choregraphe user environment. The NAO platform was utilized due to its high impact of use by more than 13,000 educators and researchers from more than 70 countries worldwide [1].
      PubDate: Oct 2019
  • Optimization of the Performance of Biosensor Based on Photonic Crystal

    • Abstract: Publication date:  Oct 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  4  Zahra Rostamikafaki   In recent decades, extensive studies have been conducted on biosensors. Of these, biosensors are of great importance, and various photonic structures have been used to design these types of sensors. In this work, optimization of the performance of photonic crystal-based biosensor has been addressed. The nano-resonant sensor is within the structure and is surrounded by two waveguides. The resonator is formed by the smaller air cavities. In order to increase the optical constraint and better coupling of light between the waveguides and the resonator, two finis waveguides have been used. By connecting the biological molecule to the measuring cavity wall, its refractive index will change and the wavelength of the resonant structure will be shifted. Several parameters such as number, thickness of layers and slope affect this sensitivity. By optimizing these parameters, changes in the refractive index can be detected.
      PubDate: Oct 2019
  • Comparison of Fractional Order PID Controller and Sliding Mode Controller
           with Computational Tuning Algorithm

    • Abstract: Publication date:  Oct 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  4  Chong Chee Soon   Rozaimi Ghazali   Shin Horng Chong   Chai Mau Shern   Yahaya Md Sam   and Ahmad Anas Yusof   The industry processes involving punching, lifting, and digging usually require high precision, high force and long operating hours that increase the prestige in the usage of the electrohydraulic actuator (EHA) system. These processes with the companion of the EHA system usually possess high dynamic complexities that are hard to be controlled and require well-designed and powerful control system. Therefore, this paper will involve the examination of the designed controllers which is applied to the EHA system. Firstly, the conventional proportional-integral-derivative (PID) controller which is the famous controller in the industry is designed. Then, the improved PID controller, which is known as the fractional order PID (FO-PID) controller is designed. After that, the design of the gradually famous robust controller in the education field, which is the sliding mode controller (SMC) is performed. Since the controller's parameters are essentially influencing the performance of the controller, the meta-heuristic optimization method, which is the particle swarm optimization (PSO) tuning method is applied. The variation in the system's parameter is applied to evaluate the performance of the designed controllers. Referring to the outcome analysis, the increment of 59.3% is obtained in the comparison between PID and FOPID, while the increment of 67.13% is obtained in the comparison of the PID with the SMC controller. As a conclusion, all of the controllers perform differently associated with their own advantages and disadvantages.
      PubDate: Oct 2019
  • The Model of the Drone System Design for a Multi-recording of the
           360-degree Video and Real-time Merging Technique

    • Abstract: Publication date:  May 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2B  Woon-Yong Kim   and Soon Gohn Kim   Background/ Objectives: Various attempts have been made to utilize drones to increase information utilization based on the 4th industrial revolution. As the availability of these drone increases, the demand for real time image information at various angles is increasing. So we need to make a research like it. Methods/ Statistical analysis: We propose a drone design model for 360-degree simultaneous multi-recording videos and a real-time video merging technique to provide efficient real-time video service in order to reduce blind spots that can occur in drone adjustment and to provide surveillance efficiency. In order to collect videos at various angles at the same time by using multiple cameras, we analyze the angle of the camera with respect to the split plane of the drones, and provide real-time video information service through efficient 360-degress videos construction and videos merging. It can be make an effective coordination and monitoring of a drone. Findings: The drones typically include one or two cameras for situational and video recording purposes, but this camera approach creates a blind spot in drone surveillance area. And also VR and 3D approach with first-person equipment of drone is lacking the real-time monitoring function at various angles in that it provides only one viewpoint at a time. In addition, it is required to recognize and utilize information more efficiently in the reality that the drones are being extended from the visibility flight to the non-visibility area. The simultaneous 360-degree video recording method using multiple cameras will improve the monitoring and operation ability of the drones and increase the utilization. To do this, we analyze multiple camera angles and construct the physical environment of the drone system for the collection and processing of effective video information. We also propose a video merging technique to provide efficient service of collected video information. Improvements/ Applications: Based on the relation between various elements constituting the drone, it can be used in various application environments by providing an efficient access and communication environment for monitoring and information required in the operation of the drone through the camera environment, real-time information collection and merging technique.
      PubDate: May 2019
  • A Study on Shifting Shock of Multi-step Electromagnetic Transmission in
           Interior Permanent Magnet Synchronous Motor for EV

    • Abstract: Publication date:  May 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2B  Hong-Sik Lim   Byeong-Chul Lee   and Ki-Chan Kim   Background/ Objectives: Apply the electromagnetic multi-step transmission method to expand the average efficiency area of electric vehicles. In this paper, analyze the influence of torque caused by shift shock due to electromagnetic multi-shift. Methods/ Statistical analysis: Research has been conducted to extend the average efficiency range of the motor by applying the electromagnetic multi-step transmission method. In addition, we analyze the effects of shift shocks on the torque of the motor through finite element analysis methods(FEM) analysis. Findings: In this paper, we study the characteristic analysis of the electromagnetic multi-step transmission method of interior permanent magnet synchronous motor. In addition, we analyzed the influence of the shift shock due to the electromagnetic multi-shift on the torque. It has been confirmed that the average efficiency section of the motor is widened by the electromagnetic multi-step transmission method, and it has been confirmed that the difference in the voltage in the shift section adversely affects the torque of the motor. It has been confirmed that the influence on the torque is different based on the shift point. Improvements/ Applications: Analyzes and derives attributes thought FEM analysis using voltage source analysis and current source analysis.
      PubDate: May 2019
  • Characteristic Analysis of Electromagnetic Multi-Shift of Interior
           Permanent Magnet Synchronous Motor

    • Abstract: Publication date:  May 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2B  Hong-Sik Lim   Do-Hyun Kim   and Ki-Chan Kim   Background/ Objectives: In order to increase the travel distance of an electric vehicle, it is important to widen the efficiency range of the motor. In this paper, we study the electromagnetic multi-shift method of the motor. Methods/ Statistical analysis: We will study the expansion of the efficiency range of the motor by applying three electromagnetic multi-shift methods. In addition, the characteristics, advantages and disadvantages of methods that switch finite element analysis methods (FEMs) are analyzed. Findings: In this paper, we study the characteristic analysis of the electromagnetic multi-shift of interior permanent magnet synchronous motor (IPMSM). For electric vehicles, the Driving Range is important. Therefore, the expansion of the range of maximum efficiency is more important than the improvement of the maximum efficiency point of the motor. Three electromagnetic transmission methods were applied and analyzed to increase the efficiency range. The first method is the high efficiency range appears to be expanded in the high-speed range, but the influence of the expansion of the maximum efficiency range is not significantly expanded as compared with the other method. In addition, second method and third method in the range of maximum efficiency are similar. However, when third method is the maximum efficiency value increases up to about 8,500 rpm operation range at about 5,000 rpm. Improvements/ Applications: The efficiency of the motor to which various electromagnetic multi-shift methods were applied was derived by FEM and the characteristics were analyzed.
      PubDate: May 2019
  • A Study on the Discharge Characteristics of Discharge Element with Control

    • Abstract: Publication date:  May 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2B  Keun-Seok Park   Young-Chan Kim   Dae-Dong Lee   and Ki-Chan Kim   Background/ Objectives: Power system control systems are constantly exposed to surge voltages. These surge voltages cause malfunction of elements controlled by a low voltage such as a CPU and a semiconductor. Methods/ Statistical analysis: A control circuit is constituted by utilizing a discharge element with control electrode and a surge voltage is applied to the control circuit to measure and analyze the discharge voltage that accompanies the capacity change of the current limiting element, transformer, etc. As a result, the effectiveness of the discharge device with control electrode and the control circuit was confirmed. Findings: The capacitance of the capacitor was selected as 0.01uF, 0.1uF, 1uF and the winding ratio of the transformer was set to 15: 1. Then, the impulse voltage of 500 V was injected and the discharge voltage was confirmed. The capacitor 1uF with the lowest discharge characteristic among the capacitors was applied and the test results for the winding ratio of 15: 1 and 20: 1 were confirmed. Applying a 1kV surge voltage to a GCA control circuit with a 1uF capacitor and a 20: 1 transformer, it was confirmed. Through this test, it was confirmed that GCA control circuit can be applied to high surge voltage and maintain low discharge voltage. Improvements/ Applications: In this paper, we study various characteristics of Gate Control Arrestor (GCA) with control electrode and we will use it appropriately in various industries.
      PubDate: May 2019
  • Experiment and Analysis for Air-to-Ground Channel in 400 MHz Band

    • Abstract: Publication date:  May 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2B  Gyeong-Mo Nam   So-Young Ju   and Eui-Rim Jeong   Background/ Objectives: Recently, air-to-ground wireless communication systems have been used in various equipment such as unmanned aerial vehicle (UAV). In this paper, we analyze the air-to-ground channel in 400 MHz band with experiment using light aircraft. Methods/ Statistical analysis: The characteristics of the air-to-ground channel are analyzed as follows. We generate and store a pilot signal in commercial vector signal generator and an aircraft equipped with the signal generator takes off. As a pilot signal, Zadoff-Chu sequence is used for its good autocorrelation characteristics. In the ground station, the received waveform is stored by using spectrum analyzer. When an airplane approaches near the ground station, airplane transmits the pilot signal and the ground station begins to store the received signals. After completing the signal storing, air-to-ground channel analysis is performed. Findings: From the experiments, we obtained several hundreds of received waveforms, and those waveforms are used for statistical air-to-ground channel analysis. According to the analysis results, most of the measurement channels are single path or line of sight channels. However, in a certain measurement, multiple paths or non-line of sight channels are observed. Those results confirm that multipath environments exist at certain air-to-ground condition. The maximum number of multipath components is 4 and the maximum delay spread is 0.4 μsec. Therefore, when designing a wireless communication system considering air-to-ground environments, the design should consider 4-path fading channels and maximum delay spread over 0.4 μsec. When designing air-to-ground wireless communication systems such as aircraft and drone systems, the experimental and analyzed channels in this paper might be useful. Improvements/ Applications: In this paper, we analyze the air-to-ground channel characteristics of a mountainous area in Korea with field experiment using light aircraft. The analyzed channel characteristics are helpful to those who want to design wireless communication systems between aircraft to ground or UAV to ground. In addition, the analyzed channel can be used for verification of compatibility for the existing communication systems to air-to-ground applications.
      PubDate: May 2019
  • Evaluation of Torque Ripple of an Optimal Designed 3-Phase Induction Motor
           Using Uncertainty

    • Abstract: Publication date:  May 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2B  Ho-Hyun Lee   Kyung-Il Woo   Han-seok Park   and Dae-Kyong Kim   Background/ Objectives: This paper aims to reliably evaluate the torque ripple of an optimal designed 3-phase induction motor using the measurement uncertainty theory. Methods/ Statistical analysis: The measurement uncertainty theory is statistically applied to the actual test. To apply the measurement uncertainty theory to the simulation result such as torque ripple, the type-A standard uncertainty can be calculated through the periodical calculation of torque ripple and the type-B standard uncertainty expressing non-statistical factors such as measurement environment, instrument or method is regarded as 0 in the uncertainty evaluation process. Findings: The general expression of torque ripple of an optimal designed 3-phase induction motor is not dependable because of the fluctuating torque at steady state. Therefore, in this paper, the uncertainty of the torque ripple is evaluated by using the type-A and the type-B standard uncertainty which is regarded as 0. As a result, the torque ripples before and after the optimal design are reliably evaluated in a specific confidence level. Also, it is known that the uncertainty can be easily applied to the torque ripple as well as other motor parameters such as power loss, output power density and so on. Improvements/ Applications: Since this paper deals with evaluation method of torque ripple of a 3-phase induction motor with respectively low torque ripple, it could be applied to motors with large torque ripple.
      PubDate: May 2019
  • Electromagnetic Force Calculation Method in Finite Element Analysis for

    • Abstract: Publication date:  May 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2B  Young Sun Kim   Background/ Objectives: Finite element method has been used widely for structural analysis of electromagnetic systems for a long time. Maxwell stress sensor and principle of virtual work are used to calculate electromagnetic force from finite element analysis results. Methods/ Statistical analysis: In this paper, specific methodologies were presented when programming was coded directly without the use of commercial software. Maxwell stress sensor is the amount of tension expressed by the interaction of electromagnetic force with mechanical physical quantity. Findings: When calculating the electromagnetic force, a method of integration was proposed when trying to integrate by selecting the element around the body to obtain the force. Also, the principle of virtual work is to induce electromagnetic force from the derivation of system energy. This method was proposed to differentiate the matrix in the finite element method. Improvements/ Applications: We selected a 3-dimensional Axisymmetric model to validate the usefulness of the proposed method of calculation.
      PubDate: May 2019
  • Application of Data Mining with Association Rules to Review Relationship
           between Insured, Products Selection and Customer Behavior

    • Abstract: Publication date:  May 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2B  Ase Suryana   and Erwin Yulianto   The world of insurance business that is full of competition makes the perpetrators must always think about breakthrough strategies that can guarantee the continuity of their insurance business. One of the main assets owned by insurance companies is business data in an extraordinary amount. Data mining is a new technology that is very useful to help insurance companies find very important information from business data as the main asset they have. Data mining can predict trends and traits of business behavior that are very useful to support important decision making. Automated analysis carried out by data mining exceeds that carried out by traditional support systems. Apriori and FP-Growth are the most famous algorithms for finding high frequency patterns, these algorithms are part of the Rule Association used in this study.
      PubDate: May 2019
  • Defining and Prioritizing Software Requirement Using gIBIS and AHP Method

    • Abstract: Publication date:  May 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2B  Falahah   Requirement engineering is an important process in a software development project. During the process there are two activities that are very significant that determine the success of the software development: requirement definition and requirement prioritization. Through this process we can set the scope of the software product and the limitations of product features for each released version. Defining and prioritizing requirements can be done using same approach. gIBIS (graphical Issue-Based Information System) is a proposed approach for the design rationale to describe the reasoning process for the solution that is chosen in order to answer a problem or issue. The graphical representation of the reasoning process using gIBIS can be supported by tools such as Compendium. This paper proposes the implementation of the gIBIS approach in defining software requirements by assigning a score for each alternative and selecting the highest score as a solution. The approach is combined with AHP (Analytical Hierarchical Process) method to set the priority and as the result we can determine the software requirements and also rank the requirements based on its priority. The criteria used in setting the priority include cost, risk, difficulty and stability. The proposed approach (combining of gIBIS and AHP) is demonstrated with a case study of prioritizing requirements for a website development of "IndoSoccerSchool". The result show that the proposed approach can help us generate a list of requirements and give them a score based on priority and the list can give a reference for developing the software based on credible priorities and then manage the software release.
      PubDate: May 2019
  • Different Kinds of Modern Technique to Develop Various Information Systems

    • Abstract: Publication date:  May 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2B  Feri Sulianta   Ai Rosita   Ulil Surtia Zulpratita   Heri Heryono   Eka Angga Laksana   and Sy. Yuliani   Basically, information system design is fundamental to the long-term sustainability of information systems. Information system architecture is a reference in developing and building new information systems if the current system is no longer able to support the activities of an organization or company. There are various information system development methods and there are various information systems architecture models. The choice of using methods and models must be carefully considered so that the information system created is right on target. A variety of techniques will be introduced to enrich knowledge in choosing development methods and architectural models that suit the needs of the organization.
      PubDate: May 2019
  • FMARI Application in Innovation and IT for Accidents' Investigation

    • Abstract: Publication date:  May 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2B  F. H. Soemidi   P. L. Hadi   and I. Z. Sutalaksana   FMARI Database Application is designed to help safety auditor in investigating work accidents and as routine monitoring in regular companies reports to safety board organization in Indonesia (BPJS for Employee) with the main goal is to reach zero accident. FMARI stands for Faktor Manusia dan Analisis Resiko Industri (application: Human Factors and Industrial Risk Analysis) is following HFACS method and make a modification from HFIX in Indonesian terms. The Human Factors Analysis and Classification System (HFACS) is a system-safety model that effectively bridges the gap between human error theory and applied human error analysis. The Human Factors Intervention matriX (HFIX) is an innovative tool for mapping intervention strategies onto the specific forms of human error identified in the HFACS.
      PubDate: May 2019
  • Identification the Potential Causes of Stopline in Electrolytic Tinning
           Line Using Multi Attribute Failure Mode Analysis

    • Abstract: Publication date:  May 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2B  R. Ekawati   N. Wahyuni   and R. Annisa   PT. XYZ often suffers stopline in its production process of producing tin plate type coil in Electrolytic Tinning Line (ETL) machine which is used nonstop. The purpose of this research is identifying cause of stopline and determining the most potential cause of stopline using Multi Attribute Failure Mode Analysis (MAFMA). MAFMA itself is a combination method between FMEA and AHP. The result shows the causes of stopline are damaged bearing, broken shaft, not fitted construction, damaged rubber lining in sidewall, many tin particles in roll, torn roll, groove roll and bubble roll. The most potential cause is damaged bearing by weight of 0.172.
      PubDate: May 2019
  • Temperature Effects in Fiber Couplers

    • Abstract: Publication date:  Jul 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  3  Rahmat Alamtaha   Ary Syahriar   and Salim Burdah   Directional Coupler is one of the devices used in signal transmission techniques in optical fiber communication systems, especially Wavelength Division Multiplexing (WDM). The directional coupler can be used as a sensitive sensor, one of which is based on wavelength shifts and coupling length shift. This paper simulates a shift in wavelength and coupling length based on the influence of temperature in the range of 30℃ to 230℃ based on the characteristics of power output. The wavelength used in this simulation is in the C-Band region, which is around 1550 nm. Temperature changes cause changes in the material refractive index. Temperature changes cause a shift in wavelength and coupling length increase which describes the characteristics of the thermo-optic effects on the directional couplers.
      PubDate: Jul 2019
  • Performance Analysis of Q Factor Optical Communication in Free Space
           Optics and Single Mode Fiber

    • Abstract: Publication date:  Jul 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  3  Salim Burdah   Rahmat Alamtaha   Octarina Nur Samijayani   Suci Rahmatia   and Ary Syahriar   Developments in the technology sector are currently experiencing rapid progress, especially in data transmission technology. The increasing need for fast data traffic in the telecommunications sector requires technology that can send data quickly. Optical fiber has the speed of receiving and sending data at 2.5 Gbps while FSO has a speed of up to 100 Gbps but this depends on Wavelength, the modulation technique used and the distance of the telescope between the transmitter and receiver. The speed of receiving and sending data also depends on the Quality (Q) of the signal, the greater the value of Quality (Q) of the signal, the better the Quality of the signal. FSO is an optical communication system that uses the atmosphere as its propagation medium and Optical Fiber uses silica as its propagation medium. Therefore, in this paper, a performance analysis of Free Space Optics (FSO) and Single Mode Fiber is carried out based on the Quality Factor and Bit Error Rate (BER) of a signal that is carried out using Optical System simulations with a wavelength of 1310 nm, 1380 nm, 1550 nm, 1550 nm and 1560 nm, with 1 km, 3 km and 5 km, respectively. Then, analysis uses an Eye Diagram to analyze the output signal and compare the Factor Q and Bit Rate Error (BER).
      PubDate: Jul 2019
  • Performance Analysis of Dispersion Compensation Fiber on NRZ and RZ
           Modulation with Difference Power Transmission

    • Abstract: Publication date:  Jul 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  3  Robi Darwis   Octarina Nur Samijayani   Ary Syahriar   and Indrawan Arifianto   Optical fiber communication has characteristics that really need attention. The characteristics of fiber optic transmission are very important in designing optical fiber networks, one of which is widening pulses called dispersions. Dispersion is the widening of light pulses in optical fibers which reduces data speed, signal to noise ratio and system quality. In addition to dispersion compensation, which is the most important feature needed in fiber-optic communication systems; transmission power needs to be considered to produce optimal signal output. In this paper, we will simulate the optimization effect of power and fiber dispersion compensation on Non Return to Zero (NRZ) and Return to Zero (RZ) modulation on optical transmission systems, with 5 dBm power parameters, 10 dBm 15 dBm and 0 dBm and DCF 5 km, 10 km, 15 km, 20 km and 25 km. Simulation results show that dispersion compensation is very influential on the transmission system. From these two modulations, there are differences in the results between NRZ and RZ. The results of dispersion compensation also affect the input power and DCF length.
      PubDate: Jul 2019
  • Simulation of Comparison from NRZ and RZ Pulse in Free Space Optics with
           Different Weather Conditions

    • Abstract: Publication date:  Jul 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  3  Muhammad Rangga Hadisiswoyo   Octarina Nur Samijayani   Ary Syahriar   and Indrawan Arifianto   FSO (Free Space Optic) is a form of optical technology communication by transmitting light to media free space. In the FSO system, the data transmission can be larger, namely 1-100 Gbps, and this is due to the large bandwidth width. FSO runs at a wavelength of 850 nm and 1550 nm. FSO is usually with a maximum distance of 2-4 km. This paper simulates the FSO optical transmission system using NRZ and RZ line coding in bright and rainy weather conditions. The parameters analyzed are Eye diagram, Optical Spec-trum, photocurrent, and received signal power. In the FSO line coding system, NRZ has an eye height value, received signal power and received photocurrent is greater than the RZ line coding at a distance of 1 km and 5 km in bright and rainy conditions. In the trial of this FSO communication system, it is better to use it at a distance of 1 km, because the received signal power is above 20 dBm and received photocurrent is still above 800 mA for NRZ and RZ line coding. This is due to the attenuation value of sunny weather conditions that are smaller between 0.2-3 dB/km, while in rain conditions between 4-17 dB/km.
      PubDate: Jul 2019
  • Modelling Temperature Effect on (Transverse Electric) TE Mode Shape of
           Optical Silica Waveguide

    • Abstract: Publication date:  Jul 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  3  Indrawan Arifianto   Muhammad Rangga Hadisiswoyo   and Ary Syahriar   Theoretical approach to study the influence of temperature of the effective refractive index value for asymmetric nonlinear optical waveguides was developed. Waveguide structures are equipped with linear cladding and substrate. Numerical modeling and calculations were performed to measure the sensitivity of the effective refractive index core thickness for transverse electrical (TE) mode and transversal magnetic (TM) mode. Based on the results, which affect the waveguide refractive index value, we can also adjust the waveguide by varying the temperature value. The waveguide structure is completed by linear cladding and substrate.
      PubDate: Jul 2019
  • Design and Comparison of Vector Quantization Codebooks for Narrowband
           Speech Coding

    • Abstract: Publication date:  Jul 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  3  Hiba Faraj   and Selma Ozaydin   Vector quantization codebook algorithms are used for coding of narrow band speech signals. Multi-stage vector quantization and split vector quantization methods are two important techniques used for coding of narrowband speech signals and these methods are very popular due to the high bit rate minimization during coding of the signals. This paper presents performance measurements of multistage vector quantization and split vector quantization methods. We used line spectral frequencies for coding of the speech signals in codebook tables so as to ensure filter stability after quantization. The codebooks were generated by using the Linde-Buzo-Gray (LBG) algorithm. The tests were performed by selecting large amount of input data in training and test stages and to evaluate noise robustness of the methods, both noisy and clean speech signals were used. As a result, different codebooks were designed and tested in many stages and different bit rates to measure quantization performance. It is measured in terms of spectral distortion evaluation. We obtained the best result in 24bit multistage vector quantization codebook with a spectral distortion less than 1 dB for clean speech training data input. When we compared multistage and split vector quantization codebook spectral distortion results, multistage codebooks gave better performance in each option.
      PubDate: Jul 2019
  • Enhanced Cluster Stability in Vehicular ad hoc Network

    • Abstract: Publication date:  Jul 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  3  K. V Rop   P. K. Langat   and H. A. Ouma   Traffic management has been and remains to be a major problem especially in urban areas with high vehicle density. Adoption of intelligent transport system (ITS) has been widely experimented with the intention of curbing traffic menace with mixed experiences as the outcome. By communicating with other vehicles travelling on the same road in form of clusters, vehicular ad hoc network (VANET) forms an ITS that can allow cooperation of vehicles with less human input. By considering the high mobility nature of the vehicles in VANET, this paper presents a solution to the main menace of VANET clustering by adopting the flexibility of fuzzy logics for cluster formation on a multilane urban highway. It also shows that the stability of clusters is improved by performing the cluster head (CH) selection process based on a combination of fuzzy logics, lane weighting, and utility function with the fuzzy membership function adjusted to increase stability of clusters.
      PubDate: Jul 2019
  • Design and Performance Improvements in an A6 Relativistic Magnetron Using
           Particle-in-cell Code

    • Abstract: Publication date:  Jul 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  3  Tusharika S Banerjee   Ayush Saxena   Arti Hadap   K. T. V. Reddy   and Apoorva Saxena   The aim of this paper is to suggest performance improvements in an A6 relativistic magnetron (RM) using the particle-in-cell (PIC), finite difference time domain (FDTD) simulation tool. It is shown that adding conductive strappings to the resonator assists in improving π-mode performance of the device by modulating the beam velocity profile. Comparisons have been made between the performance variables of a strapped and an unstrapped relativistic magnetron. In addition, the tapered mode converting structures are investigated which also assist in the π-mode performance of the RM. Also, a review is made on the basic operation of the RM with elements from both circuit and field theory.
      PubDate: Jul 2019
  • Optimal Placement of a UAV to Prolong the Lifetime of Indoor Wireless

    • Abstract: Publication date:  Jul 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  3  Hazim Shakhatreh   Unmanned aerial vehicles (UAVs) can be used as aerial wireless base stations when cellular networks go down. Prior studies on UAV-based wireless coverage typically consider outdoor scenarios, where a UAV and wireless devices are outdoor. In this paper, the problem of UAV placement is studied, where the goal is to find the optimum location of a single UAV that prolongs the lifetime of indoor wireless devices. First, a realistic Indoor-Outdoor path loss model is presented and the tradeoff introduced by this model is described. Then, the problem of UAV placement is formulated, where the goal is to find the optimum UAV location that prolongs the lifetime of indoor wireless devices. It can be proven that the constraint sets of the problem can be represented by a convex set in terms of three variables. To this end, an algorithm to find the optimum UAV location is proposed. Simulation results are presented to validate the effectiveness of the proposed algorithm.
      PubDate: Jul 2019
  • Linear Algebra Based Generalization of the Kennelly's Theorem

    • Abstract: Publication date:  Jul 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  3  Ali Krim   Abderrazak Lakrim   and Driss Tahri   The Kennelly theorem which is widely used in three phase systems allows for the delta-star and star-delta conversion and simplification of several electronic circuits. In the present work, we propose a generalization based on the theorem of superposition and some results of linear algebra. Our demonstration is inspired from the proof of the classical Kennelly's theorem. The proposed formulas are very clear and simple. This will make it possible to convert polygon-start and star -polygon if the number of impedances is odd, greater than or equals three. The advantage of our proposal is that it could be understood and programmed easily by undergraduate student when compared to other methods based on the graph theory, which focuses mainly on the mesh-star conversion, which is not possible in all configurations in both ways. This result can be applied to reduce the number of nodes in circuit type models of electrical components and electronic circuits. Thus, the simulation time is reduced.
      PubDate: Jul 2019
  • Conceptual Framework: Rapid Web Application Development by Using Component
           Reuse and Case Based Reasoning

    • Abstract: Publication date:  Jul 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  3  Eka Angga Laksana   and Feri Sulianta   Developing web application from scratch is a cumbersome task. There is a need for a fast and efficient methodology to develop web-based application to realize user's requirement. User's requirement and expectation have increased because of the complexity of business process. This paper introduces a new method which allows web developer to build application faster. Reuse-based software component concept is used to construct cases in case-based reasoning. Case-based reasoning method defined a mechanism for learning on the basis of the previous case in order to solve the current problem. That is the basic idea about how to build application generator as fast development by reuse collection of previous code component.
      PubDate: Jul 2019
  • Dynamic Role-based User Service Authority Control and Management on Cloud

    • Abstract: Publication date:  Jul 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  3  Yejin Kwon   Jerry H. Seo   and Young Bom Park   The demands for computing resource allocation, user management, and various contents management are increasing with the proliferation of cloud computing. A cloud service system has to provide the system services that are combined or shared based on the web environment, unlike a single application in the past. It has also evolved to appropriately allocate and combine service resources according to the needs and needs of various users to provide a user-dependent web environment. There is an increasing need for software convergence services in the form of software. In response to these needs, a variety of customized services are provided to a user who promises an optional service environment. Those services can be used in combination according to a user's purpose and needs, instead of providing an environment in which a user purchases and uses software locally. In particular, because cloud computing provides the process that a user gain accessing authority to the system which has been granted a service access right for a certain period of time, and including a process of expire the corresponding right is completed, a various authority access control method is designed. In this paper, we define the roles of users who access cloud computing service, and manage user rights according to each role, provide and expire appropriate service resources according to user's privilege and session information. Moreover we analyzed the procedures for constructing an algorithm for service ripple effects according to the procedure of granting service resources to each user and accessing web services and constructing a new role.
      PubDate: Jul 2019
  • Simulation and Fabrication of a Wilkinson 8-port Unequal Power Splitter

    • Abstract: Publication date:  Jan 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  1  Mohammad Amir Ghasemi Shabankareh   and Elnaz Arman   In this paper, a Wilkinson 8-port unequal power splitter with symmetric power division among corresponding ports is investigated. Simulation and fabrication results show desirable power transmission at central frequency of 9.68GHz. This power splitter has transmission power of -13.25dB at corresponding ports 2 and 9, -11.4dB at ports 3 and 8, -10.36dB at ports 4 and 7, -9.7dB at ports 5 and 6. In addition, the proposed power splitter is suitable for feeding the array antenna due to its -16dB return loss and it minimizes return loss.
      PubDate: Jan 2019
  • An Iterative Method to Solve Nonlinear Equations

    • Abstract: Publication date:  Jan 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  1  Rubén Villafuerte   Jesús Medina   Rubén A. Villafuerte S.   Victorino Juárez   and Manuel González   In this paper, an iterative Newton-type method of three steps and fourth order is applied to solve the nonlinear equations that model the load flow in electric power systems. With the proposed method (N-1) non-linear equations are formulated and solved iteratively to calculate the Voltage in each node of an electrical system. The justification of the method and its theoretical preliminaries are presented in this paper. The proposed method is applied to IEEE test systems, and their results are compared obtaining a maximum error of 0.5%. From the results obtained, the proposed method is an alternative to solve load flows in electrical systems.
      PubDate: Jan 2019
  • An Optimization Design Strategy for Arithmetic Logic Unit

    • Abstract: Publication date:  Jan 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  1  Jitesh R. Shinde   and Shilpa J. Shinde   The work in this paper presents a step by step optimization approach for the Arithmetic Logic Unit (ALU) at the logic circuit level. Herein concept of resource sharing (viz. operator sharing, functionality sharing), the concept of optimized arithmetic expressions (viz. arranging expression trees for minimum delay, sharing common subexpression, merging cascaded adders with carry) for optimization of combinational blocks in ALU had been used. The work in this paper shows how a simple tools like Deeds Digital Circuit Simulator (open source) or Aldec's Active HDL in combination with synthesis tool which can be used as effective teaching resource to teach concept of digital circuit design and thereby provides a vision to beginners how to start with VLSI project in VLSI digital domain and make it to a successful end.
      PubDate: Jan 2019
  • Recognition of Degraded and Non Degraded Roman Characters Using Different

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5  Deval Verma   Himanshu Agarwal   and A. K Aggarwal   In this paper, we present an efficient and robust technique for the recognition of offline roman characters. The main strategy is to extract statistical and similarity features using a combination of grey level co-occurrence matrix (GLCM) and complementary similarity measure (CSM) method. In this work, the CSM method is used to extract features from binary images and combined with GLCM to boost the accuracy of character recognition. The recognition has been done using four different classifiers i.e. artificial neural network (ANN), Naive Bayes classifier, random forest (RF) and support vector machine (SVM). The standard dataset has been used for experimental work. We have done experiments on the clean and noisy dataset. It achieves the accuracy of 100% for some characters without noise and 94:11% with impulsive noise. A comparison of these four classifiers is recorded with and without a noisy environment. On a clean dataset, the random forest provides the best average recognition accuracy of 84:9% for all characters. On low noise datasets, random forest and artificial neural networks have almost the same recognition accuracy and on high noise datasets, SVM provides the highest recognition accuracy.
      PubDate: Dec 2019
  • Sensorless Nonlinear Control Strategy of the Single Phase Active Power
           Filters via Two-time Scale Singular Perturbation Technique

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5  Y. Mchaouar   C. Taghzaoui   A. Abouloifa   M. Fettach   A. Ellali   I. Lachkar   and F. Giri   This paper focuses on the problem of controlling single-phase shunt active power filters (APFs) operating in the presence of nonlinear and uncertain loads. The main difficulties when controlling this kind of filter are the existence of a strong non-linearity of the system and state variables inaccessible to measurements. This paper proposes a double-loop cascade controller developed on the basis of the singular perturbation technique in order to meet two main control objectives: (i) the inner-loop is designed to compensate the harmonic and reactive currents absorbed by the nonlinear load enforcing power factor correction; (ii) the outer-loop is synthesized to regulate the inverter output capacitor voltage. The controller also includes two-time scale sliding mode observer to estimate the network voltage that is not accessible to measurement. In this work, the singular perturbation technique and averaging theory are used for a complete and rigorous formal analysis to describe the control system performances. The effectiveness of this approach has been successfully verified through computer simulations using the Matlab/Simulink environment.
      PubDate: Dec 2019
  • Study of Azimuth Angle and Elevation Angle Variations of IRNSS/NavIC

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5  Sruthi Samyuktha Sathyana   Thangadurai N   Saribala Priyanka   Gutti Vaddi Navya   and Gayathri K M   The IRNSS satellite network covers a large area of the India with 7 satellites, 3 geostationary and 4 that are geosynchronous. IRNSS signals are transmitted in the L5 and S-Bands. The L5 band frequencies range from 1164.45-1188.45 MHz and the S band frequencies range of 2483.5-2500 MHz. NavIC is the IRNSS satellite constellation network that can be employed to a variety of applications. The paper shows the analysis of the azimuth and elevation angle with respect to carrier to noise ratio. This study will be stepping stone for the collection of data using reflectometry. The different graphs were obtained and analyzed. Satellite tool kit is also used for the analysis of the elevation and azimuth angle.
      PubDate: Dec 2019
  • Public Perception of the Influence of Digital Media on Cyber Security in

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5  Chika Euphemia Asogwa   The objective of this study was to examine public perception of the influence of digital media on cyber security. The survey research design was used for the study. A total of 384 respondents were selected from Enugu State to provide data for the study. In the sample, only people with background on issues related to cyber security were included. The questionnaire served as the instrument for data collection. Data were analyzed using both descriptive and inferential statistics. It was found that the sample studied reported that digital media are significantly and negatively affecting cyber security breaches, and promoting cyber crimes. The result of the hypotheses tested revealed a significant association between digital media and cyber security breaches and digital media and cybercrime. The practical, theoretical and scholarly implications of the results have been explored.
      PubDate: Dec 2019
  • Designs Neuro-Fuzzy Models in Control Problems of a Steam Heater

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5  Siddikov Isamidin Xakimovich   and Bakhrieva Xurshida Askarxodjaevna   The article deals with the design of neuro-fuzzy models in the tasks of creating a system of automatic control by technological processes of steam-generating heat engines. A methodology has been developed for creating a temperature control system for a superheated operating under a priori uncertainties. Such control systems relate to adaptive systems capable of controlling the object with significant, previously unknown, changes in the parameters of the object. The use of an artificial neuron is proposed as adaptive regulation. A fuzzy model of the proportional-integral-differential-regulator adapter has been developed, an automatic control system based on the Mamdani algorithm. The proposed method for constructing an adaptive controller makes it possible to exclude the active identification stage from the automatic tuning process and the associated deterioration in the operation of the regulatory object. The feasibility and effectiveness of the method is proven experimentally. Computer testing of the obtained model in uncertain conditions was carried out, when the values of the transfer function of a complex control object changed. Regulation is carried out on the basis of the proposed hybrid high-speed algorithm of fuzzy-logical derivation of the main parameters: vapor pressure and temperature. The algorithm for setting the weight coefficients of the neuron is presented. The use of an adaptive fuzzy-logical controller allows us to provide a fairly good quality of controlling the temperature of superheated steam. To create process control algorithms, a hybrid application of a neural network and fuzzy logic is proposed, which allows taking into account the uncertainty of changes in the parameters of the object and the environment. The results can be used in the development of adaptive control systems and other heat power devices.
      PubDate: Dec 2019
  • Solar Home System with Diversified Roofing Construction

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5  Hamzah Eteruddin   David Setiawan   Atmam   and Burhan Nasution   Conventional power plants generally emit Greenhouse gases (GHGs) that potentially pollute the environment. Solar Home Systems (SHS) are electrical appliances capable of generating electrical energy by absorbing the sunlight radiation. The operation of Solar Home Systems does not result in pollution. The unlimited amount of solar radiation in our nature makes Solar Home Systems affordable and eco-friendly. In this research, we implemented these Solar Home Systems as a household power supply by taking advantage of diversified roofing conditions in a residential area in Lembah Damai village, Rumbai Pesisir district, Pekanbaru. Different directions and angles of the solar radiation receiver affected the energy output. Observing electrical energy output in five houses as the subject of the research, we found out that House 4's on the side-B roof with a 24-degree inclination and a 72-degree orientation generated the highest power output amounting to 1,265 kWh/yr. Meanwhile, House 2's side-A roof with a 28-degree inclination of and 239-degree orientation generated the lowest power output amounting to 1,073.9 kWh/yr. Thus, the fluctuation accounted for 17.8%.
      PubDate: Dec 2019
  • The Influence of Magnetic Field on Pulse Distribution of Laser Diode

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5  Samer H. Zyoud   and Atef Abdelkader   The characteristics of a semiconductor laser diode (LD) are highly dependent on the magnetic field that applied on it. This study is valuable in several fields, including the existence of a magnetic field especially in a narrow region, which is difficult to detect by traditional techniques. This will lead to manufacture a micro-sensor to measure a weak magnetic field. In this study, we have investigated the influence of magnetic field, with an amplitude of (zero – 0.55 T) on dynamical characteristics of semiconductor laser diode. This magnetic field has applied parallel and perpendicular on the axis of the active region of the laser diode (LD) chip. The LD used in this study is (Sanyo DL3149-056. ALGanP Index Guided Multiple Quantum will active laser and had threshold current of 11.15 mA and slope efficiency of 189.4 mW/A). It has been found that the full width half-maximum (FWHN), and the peak channel number (PCN) shift, were all increasing with the increased of magnetic field. Finally, the results show that while the peak of the pulse (light intensity) reduces with the increasing of magnetic field, the appearance of more than one peak (abnormalities) on the laser pulse has been founded clearly.
      PubDate: Dec 2019
  • Depth Control of Autonomous Underwater Vehicle Using Discrete Time Sliding
           Mode Controller

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5B  Nira Mawangi Sarif   Rafidah Ngadengon   Herdawatie Abdul Kadir   and Mohd Hafiz A.Jalil   This study presents a Discrete Time Sliding Mode Controller (DSMC) application on depth plane of Autonomous Underwater Vehicle (AUV). The main contribution on this work is an implementation of DSMC on NSP AUV II. Sliding Mode Control (SMC) is a robust type of controller and certainly suitable for controlling AUV in the presence of environmental disturbances and uncertainties. DSMC preserves the properties of standard SMC. Linearized dynamic model of NSP AUV II is used in the numerical simulations. Discrete Proportional Integral Derivative (PID) controllers are used for performance comparative analysis. The design of discrete PID and DSMC for NSP AUV II depth is described. Comparative study between the control laws is presented. The simulated results illustrate strong robustness, improve performance and satisfactory stability of DSMC as compared to discrete-time PID controller.
      PubDate: Dec 2019
  • Band Anti-Crossing Modelling on Tailored Ga1-xInxN yAs1-y Band Gap Energy
           Based Nitrogen Fraction

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5B  Muhammad Izzuddin Abd Samad   Khairul Anuar Mohamad   Mohammad Syahmi Nordin   Nafarizal Nayan   Afishah Alias   Marinah Othman   Adrian Boland-Thoms   and Anthony John Vickers   This paper deals with a Band Anti-Crossing (BAC) modelling to investigate the tailoring of band gap energy of Ga1-xInxNyAs1-y alloy based on nitrogen fractions. Three different numerical methods have been adopted to estimate the extended state of conduction band () parameters. The first two methods used Vegard’s law and Varshni’s equation to estimate by considering Ga1-xInxAs as ternary alloy based on temperature dependence, with values of bowing parameter of 0.475 and 0.477, respectively. The third method used excitonic band gap theory for Ga1-xInxAs alloy temperature dependence by considering Passler fitting () and average phonon temperature (). Results depict that optimum nitrogen fraction was in the range of 0.012 to 0.018% to achieve the device response at 1.3 μm wavelength, with an energy band gap in range of 0.955 ± 0.005 eV. Future work shows a potential study on influence of indium fractions in tailored energy band gap of Ga1-xInxN yAs1-y alloy and compressive strain of material.
      PubDate: Dec 2019
  • The Effect of the Magnetic Field to the Microstructure and Sensitivity of
           Cu/Ni Film

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5B  Azmi Khusnani   Moh. Toifur   Guntur Maruto   and Yudhiakto Pramudya   Cu/Ni thin film has been made by electroplating method assisted by magnetic fields. The solution consists of a mixture of NiSO4 (260 g/L), NiCl2 (60 g/L) and H3BO3 (40g/L). The magnetic field varied in the range of 0-200 gauss in a direction perpendicular to the electric field. Plating was carried out at a voltage of 1.5 volts, the electrolyte temperature is 60 ℃ during 5 s. The results indicate that the Ni film has been formed on the surface of the Cu plate. Testing of sheet resistivity shows that by coating Ni on Cu substrate the resistivity sheet of Cu/Ni increases. The increase in resistivity is proportional to the magnitude of the magnetic field. Investigation on the Ni morphology shows that the larger the magnetic field the smaller the grain size so that the composition of Ni particles becomes more tightly packed. Whereas, in sensor sensitivity, all samples showed their role as low-temperature sensors. The sensitivity decreases along with the magnitude of the magnetic field given.
      PubDate: Dec 2019
  • Effect of Mass Fraction of Ni in Solution on the Microstructure and
           Sensitivity of Cu/Ni Film as Low-Temperature Sensor

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5B  Moh. Toifur   Azmi Khusnani   and Okimustava   The purpose of this research is studying microstructure, the resistivity of Cu/Ni film produced by electroplating on the various mass fraction of Ni in the electrolyte. Then the film is tested for its performance as a temperature sensor. The electrolyte solution was made from mixing of NiSO4, NiCl2, H3BO3, and H2O. Plating was conducted on power 1.5 V and 60℃ bath temperature. The results showed deposits containing Ni and NiO. The X-ray diffraction parameters of Ni[111] and NiO[111] such as intensity, d-spacing and grain size on variations of Ni mass fraction in solution followed the parameters diffraction of Cu[111]. The resistivity is contributed by competition between those three diffraction parameters. Testing Cu/Ni films for sensing the temperature of liquid nitrogen (0℃ to -140℃) shows that all samples have exhibited their performance as low-temperature sensors. The temperature has a linear relationship to the output voltage of the sensor with the sensitivity ranging from 0.75´10-3 V/℃ to 1.05´10-3 V/℃. The highest sensitivity in accordance to the sample produced from 8.83 g Ni in the electrolyte.
      PubDate: Dec 2019
  • Implementation of Haar Cascade Classifier and Eye Aspect Ratio for Driver
           Drowsiness Detection Using Raspberry Pi

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5B  Nora Kamarudin   Nur Anida Jumadi   Ng Li Mun   Ng Chun Keat   Audrey Huong Kah Ching   Wan Mahani Hafizah Wan Mahmud   Marlia Morsin   and Farhanahani Mahmud   Driver’s drowsiness is one of the leading contributing factors to the increasing accidents statistics in Malaysia. Therefore, the design and development of driver drowsiness detection based on image processing using Raspberry Pi camera module sensor interfacing with Raspberry Pi 3 board are proposed in this paper. To achieve the aim of the research, the Haar Cascade Classifier algorithm is implemented for eyes and face detection whereas for eyes blink (open and close) detection, the Eye Aspect Ratio (EAR) algorithm is employed. From several experiments conducted on six recruited subjects, the findings revealed that the accuracy of Haar Cascade classifier to detect the eyes and faces was subjected to correct sitting position (head must facing to the camera) as well as the eyes must not be covered with glasses or shades. Meanwhile, the range of average EAR value detected by the system was between 0.141 (eyes closed) and 0.339 (eyes opened). In conclusion, the image processing-based Haar Cascade and EAR algorithms utilized on Raspberry Pi platform have been successfully executed. For future improvement, the current board can be replaced with Raspberry Pi Touch Screen to minimize the hardware setup and the physiological based analysis using alcohol and heart rate sensors can be added.
      PubDate: Dec 2019
  • A Compact Triple-Notch Band Ultra-Wideband Antenna

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5B  Munirah Az Zahra Abdul Rashid   Shaharil Mohd Shah   and Asmarashid Ponniran   This paper proposed a compact ultra-wideband (UWB) antenna (17.5 × 20.5 mm2) with a triple-notch band characteristic to overcome the interference caused by the three narrow frequency bands that coexist within the ultra-wideband frequency ranging from 3.1 to 10.6 GHz as stipulated by the Federal Communication Commission (FCC). Two slots on the radiating patch and a copper trace on the ground plane of the antenna were introduced to reject the WiMAX, WLAN and SHF frequency bands. The dimensions of the slots and copper trace are optimized to achieve the desired band rejections. The compact size of the antenna is in line with the miniaturization requirement of modern wireless communication devices but at the same time is able to support multiple wireless communication services. The simulation result shows that the antenna can function over the UWB frequency range but with band rejections on the WiMAX band (from 3.2 GHz to 3.6 GHz, WLAN band) (from 5.15 GHz to 5.85 GHz) and SHF band (from 7.25 GHz to 8.395 GHz). The proposed antennas are simulated and designed in CST Microwave Studio® software and fabricated on a FR-4 substrate with a relative dielectric constant, εr of 4.5, loss tangent, tan δ of 0.019 and thickness, h of 1.6 mm.
      PubDate: Dec 2019
  • Towards Skin Tissue Oxygen Monitoring: An Investigation of Optimal Visible
           Spectral Range and Minimal Spectral Resolution

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5B  Audrey Huong   Kim Gaik Tay   and Xavier Ngu   This paper investigated the minimum spectral resolution and optimal spectra range for optical monitoring of skin blood oxygen saturation (StO2). For this purpose, this study recruited fourteen Asian volunteers for demonstration work. The performed measurements included reflectance information collected from the recruits during at rest and after a pressure of 140 mmHg was applied on their upper right arm. The prediction of the required value was via analysis of data of the considered visible ranges of 500 – 660 nm, 520 – 645 nm, 520 – 600 nm, and 530 – 570 nm, with sampling resolutions of 1 nm, 2 nm, 5 nm, and 10 nm. The offline data analysis using Extended Modified Lambert Beer model revealed that the StO2 value predicted using spectral data in the range 530 – 570 nm showed considerable similarity with that obtained from 520 – 645 nm range at spectral resolutions of up to 5 nm. The mean and standard deviation of the differences in the values obtained from these spectral ranges in the case of 5 nm sampling is given by 7 ± 8.6 % and 14 ± 3.2 % for at rest and blood occlusion experiment, respectively. The higher variability in the value predicted for the latter experiment is likely due to insufficiency of the employed technique to extricate the distinctive features in hemoglobin spectra using the corresponding resolution. The findings of this study may be useful as a guide to facilitate in the design of multispectral imaging system for optical monitoring of one’s StO2 with high speed.
      PubDate: Dec 2019
  • Design and Analysis of 2-in-1 DC/DC Converter Trainer with Reduced Number
           of Components

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5B  A. A. Bakar   A. F. H. A. Gani   H. A. M. Ridzuan   A. Ponniran   M. U. Wahyu   and M. A. N. Amran   The field of power electronics around the world has shown a growth in its development, rising as a specialization in electrical engineering. Along these lines, for further comprehension of the field’s theory, universities should take the lead in developing equipment for hands-on practical training. Several converter trainer kits exist in the market from many companies. A review of previous designs gives adequate ideas on the basics of the trainer and the components used in the trainer. The higher number of components used in the trainer significantly increases the cost, size and complexity of the system. Therefore, this paper outlines the design and development of a DC/DC converter trainer with buck and boost configurations. The proposed 2-in-1 DC/DC converter trainer can be configured as buck or boost at a time. The DC/DC converter comprises identical components but with different circuit configuration and operation. The circuit parameters are first calculated. To verify the effectiveness and functionality of the proposed trainer, a prototype is tested and compared with the simulation results from MATLAB/Simulink software. The proposed trainer uses Field-Programmable Gate Array (FPGA) to generate the Pulse-Width Modulation (PWM) signals. The findings obtained show that both theoretical simulation and experimental results align with each other. The results show that the proposed trainer can be designed with identical parameter components under certain constraints and conditions.
      PubDate: Dec 2019
  • Impact of Random Dispersion Fluctuations on Two-Pump Fiber Optical
           Parametric Amplifier Performances

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5B  N. Othman   K. G. Tay   H. Pakarzadeh   N. A. Cholan   N. S. M. Shah   and R. Talib   The impact of random dispersion fluctuations on two-pump (2-P) fiber optical parametric amplifier (FOPA) performance in terms of parametric gain, 3-dB amplification bandwidth and saturation power is numerically investigated. The four-coupled amplitude equations which represent the parametric process in optical fiber are solved using the Runge-Kutta method. Based on the results, it was observed that the random dispersion fluctuations reduced the parametric gain, increased the saturation power and had no significant effect on 3-dB amplification bandwidth. The resulted behaviors are mainly due to the changes of phase-matching condition in optical fiber. All in all, the random dispersion fluctuations are potentially limited the 2-P FOPA performances.
      PubDate: Dec 2019
  • Effect in Positioning Gold Nanoparticle inside Plasmonic Solar Cell on
           Absorption, Reflection and Transmission

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5B  Norasikin M Nasar   Rosmila Abdul-Kahar   Nor Shamsidah Amir Hamzah   Fahmiruddin Esa   and Mirza Basyir Rodhuan   Gold nanoparticle has been explored in different ways to enhance the absorption of light and improve the efficiency of plasmonic solar cell. In this study, various positions of a gold nanoparticle which are at 115 nm, 230 nm and 305 nm measured vertically from the bottom of the solar cell to the centre of gold nanoparticle embedded into silicon layer of plasmonic solar cell is demonstrated using numerical simulation. The aim is to investigate the absorption, reflection and transmission percentage with different wavelength in different position of gold nanoparticle in plasmonic solar cell. The numerical results showed that the highest absorption and lowest reflection and transmission occurred at position 305 nm in the range 100 nm to 1000 nm compared to the simulation without nanoparticle and other position. The overall simulation results proved that at position 305 nm of gold nanoparticle which is near to the top layer is more efficient because this position has high electric field intensity in visible range
      PubDate: Dec 2019
  • Effects of Laser Radiation on the Optical and Electrical Properties of ITO
           Thin Films Deposited by RF Sputtering

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5B  Aliyu Kabiru Isiyaku   Ahmad Hadi Ali   and Nafarizal Nayan   Annealing treatment of transparent conducting oxide (TCO) thin films plays a great role in enhancing the optoelectronic properties of the material. Changes in morphological, optical and electrical properties of indium tin oxide (ITO) thin films deposited by RF sputtering were investigated after exposing the films to Nd:YAG laser radiation. ITO thin films of 158 nm thickness were irradiated with different laser energy; 25 mJ, 75 mJ, 120 mJ and 165 mJ respectively. Atomic force microscopy (AFM) results reveal a smooth surface morphology and enhance grain size as the laser energy increases. Highest optical transmittance value of 96.5 % at 620 nm wavelength was obtained by film treated with 165 mJ laser energy as determined by UV-Vis spectrophotometer. Electrical resistivity measurements as determined by four-point probe show a significant decrease in resistivity and sheet resistance with respect to increasing laser energies. The ITO films optoelectronics properties were enhanced with the film annealed at 165 mJ exhibiting the highest calculated figure of merit. This laser treatment method has effectively fine turned the ITO films properties toward TCO functional properties required for solar cell application.
      PubDate: Dec 2019
  • Dispatch Strategy for Grid-connected Micro-wind Turbine Generators with
           Battery: Case Study in Malaysia

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  S M Suboh   N H Baharudin   and O A Basheer   In recent years, Malaysian government has been searching for an opportunity to realize the first wind farm in Malaysia to achieve 20% penetration of renewable energy by 2025. Even though Malaysia experiences low average wind speed, but rapid advancement of micro-wind turbine technology promises a potential enhancement of wind harvesting in Malaysia in the near future. Concerning of high wind penetration to the grid, severe technical problems because of its fluctuating and intermittent nature will affect the power system stability. In view of that, this paper proposes a dispatch strategy for a wind farm comprising micro-wind turbine generators supported by a battery to minimize the fluctuation where for a monthly interval, a different value of reference power is followed. In parallel, the lower and upper constraints of battery state-of-charge must be satisfied. The proposed strategy is validated using the real wind data measured at Mersing, Malaysia. The results reveal that the proposed strategy successfully reduces the fluctuation and achieves the reference power for most of the intervals while ensuring the battery operates within a safe operating region. Using the simulation results, the payback period is estimated, which exposes that this project as an example, requires about 20 years of period to reimburse the capital expenditure.
      PubDate: Dec 2019
  • Supercontinuum Generation in Highly Nonlinear PQF with Two Zero Dispersion

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  Sivacoumar Rajalingam   and Zachariah C. Alex   An optical input pulse with a duration of nanosecond to femtosecond propagates through a dispersive nonlinear medium, it is subject to an extreme spectral broadening termed as white light supercontinuum (SC). In PCF, dispersion characteristics can be modified by the waveguide geometric parameters and thereby the nonlinear dynamics can be altered. In this article, the fiber parameters like core diameter, doping percentage, and pitch are varied and analyzed to achieve a conclusive zero-dispersion wavelength (ZDW) and a high nonlinearity. The numerical study presents different designs of solid-core photonic quasi-crystal fiber (PQF) and selection of highly nonlinear fiber with an effective area of 1.14 mm2 and nonlinearity of 196 W-1-km-1 at 780 nm exhibiting two-zero dispersion wavelength for supercontinuum generation in different regimes. The results exhibit a significant pulse broadening effect when the pump pulse (FWHM) was varied from 25 fs to 100 fs. Similarly, the influences of the pulse energy and peak average power on the bandwidth of the generated SC are studied
      PubDate: Dec 2019
  • Hybrid Artificial Immune System-firefly Algorithm Technique for Optimal DG
           Capacity and Operational Strategy in Distribution System

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  M S Yusof   S R A Rahim   M H Hussain   S A Azmi   A Azmi   and N Hashim   This paper presents a study on hybrid optimization technique for optimal distributed generation (DG) capacity and operational strategy in distribution system. In this study, hybrid method namely Artificial Immune System-Firefly Algorithm (AISFA) is developed to determine the optimal size of the schemes respectively in the distribution system. The Firefly Algorithm (FA) which is a type of meta-heuristic algorithm is inspired by the blinking or flashing behaviour of fireflies that is embedded into Artificial Immune System (AIS) algorithm. The aim of this study is to develop the AISFA algorithm in order to improve the voltage profile and minimize losses of distribution system between the different operational strategy and types of DG. The types of DG include DG type 1, DG type 2, and DG type 3. The proposed technique was verified on IEEE 69-bus test system and the program was developed using the MATLAB programming software. The results showed a significant loss reduction in the line losses and voltage profile improvement has been obtained for optimal DG capacity and operational strategy in distribution system. From the simulation, the results were recorded in terms of the total losses and minimum voltage for the system. The results of the optimisation process of DG are utilized for the assistance of power system operators and planners. The power system planner can adopt the suitable sizes and locations from the obtained result for the planning of utility in term of economic and geographical consideration.
      PubDate: Dec 2019
  • Development of Dimensional Relation of Surface Leakage Current in
           Correlation with Humidity and Applied Voltage Stress for a Contaminated
           Overhead Insulator

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  F S Abdullah   M A M Piah   N A Othman   and A Din   Many empirical relations are proposed to estimate the surface leakage current (LC) through the experimental and simulation works. However, there are less exploration on developing the empirical equation that describe the surface LC in correlation with humidity and applied voltage stress. In this paper, an empirical relationship between the surface LC with humidity and applied voltage stress is proposed by using Dimensional Analysis (DA) technique. DA introduces a systematic approach based on Buckingham Theorem to present a complex relationship between the physical quantities into a dimensionless set of products. For validation purpose, the results obtained from the proposed mathematical model are compared to the practical data from the previous researchers. The validation shows that the analytical results are within the range of experimental results. By further analyzing the quantitative error analysis; mean absolute error (MAE) and root mean square error (RMSE), the proposed model is found to be able to be used as a predictive model to estimate the performance of surface LC at different relative humidity and applied voltage stress and contribute in reducing the testing expenses.
      PubDate: Dec 2019
  • QR-like Secret Data Hiding in Integer Wavelet Transform Domain Images

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  Thanikaiselvan V   Sivanantham S   and Debopam Dey   Steganography is the process of hiding secret information in other multimedia files, like image, audio and video, such that any unauthorized person does not have any clue of the hidden secret data. Due to the recent computational advancements, there has been an increased risk in secure communication and thus, steganography has become one of the most researched domains in information security. In this paper, a novel method of steganography is approached where the cover image is scrambled using graph theory; then the secret data is embedded in the LH, HL and HH planes using LSB embedding of the cover image after applying Haar forward transform to get the embedded image. The secret data hidden in the cover image is first converted to a QR-like (Quick Response) image and then to be embedded in the cover media. The stego image is obtained after reverse Haar transform and descrambling of the embedded image. The proposed method when applied to a set of grayscale images, not only gave us stego images with greater embedding capacity but also high Peak Signal to Noise Ratio (PSNR) and a low Mean Square Error (MSE) and very appreciable Normalized Cross-Correlation (NCC) along with a good Structural Similarity Index Matrix (SSIM) when compared to the cover images.
      PubDate: Dec 2019
  • Development of a Low-cost Thermal Camera for Electrical Condition

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  Min Qi Ng   and Soo Siang Teoh   Abnormal rises in temperature of electrical equipment could be a sign of electric fault. By measuring the temperature of the equipment, it is possible to detect the early sign of electrical failure. Therefore, preventive maintenance based on thermal inspection is important to ensure the safety operation of the electrical system. Thermal inspection is normally done by using a handheld thermal camera. However, professional thermal camera is expensive and not suitable to be installed at a fixed location for continuous temperature monitoring. In this paper, a low-cost embedded system is proposed for measuring the temperature of electrical equipment based on thermal imaging. The system can be permanently installed to continuously monitor the thermal condition of an electrical installation. The proposed system consists of a Raspberry Pi 3 controller board connected to a MLX90640 32x24 pixels thermal sensor and a Pi NoIR camera. The temperatures measured by the thermal array sensor are converted into a heat map to form a thermal image. The thermal image is then overlaid on the visual image and displayed on the LCD screen. The system can be programmed to generate warning signal when the measured temperature is above a certain threshold value. Experiments carried out on the developed system showed that it is able to locate the hotspot regions of an electrical installation.
      PubDate: Dec 2019
  • 132kV Oil Impregnated Paper Bushing Transformer - Design by CAD, Analysed
           by FEM

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  N. Abd. Rahman   M. Isa   M. N. K. H. Rohani   H A. Hamid   and Mohd Mustafa Al Bakri Abdullah   The Electric Field and Voltage Distribution (EFVD) are an important parameter for assessing high voltage bushing transformer performance. However, conducting laboratories experiment is dangerous, difficult and expensive due to several aspects. Therefore, Finite Element Method (FEM) software is the best option used as a tool for the assessment of bushing transformer's performance in terms of EFVD. But, before an assessment of analysis could be carried out, an accurate model of bushing transformer must first to be designed. In this research, Computer Aided Design (CAD) software has been employed to design the 145kV bushing transformer based on actual dimension. Upon completion, the design has been exported to FEM software for further analysis. In FEM software, measurement and analysis of electric field and voltage distribution (EFVD) have been carried out. The measurements are performed at various locations of bushing transformer such as of the porcelain surface (both air and oil side), along with aluminum foils, and at oil-impregnated paper (OIP). The results obtained have been compared with other researchers and it is found very satisfactory.
      PubDate: Dec 2019
  • Coordinated Power Management for Variable Speed Diesel Generator and
           Lithium-ion Battery Hybrid System

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  Gireesh Kumar A   and C A Babu   This paper presents coordinated operation of power management strategies for a hybrid system. This hybrid system is modeled based on dynamic variation of load power and its effective distribution strategy. The proposed hybrid system consists of variable speed diesel generator (VSDG) and lithium-ion battery which is able to supply electric power for Power, Water and Communication (PWC) economically and efficiently in rural areas. The variation of power demand in PWC load is highlighted in load profile. The total PWC load is effectively shared by two VSDGs and one Lithium-Ion battery bank. The use of advanced VSDG helps hybrid system to reduce fuel consumption as its speed varies with load demand. The proposed segmentation of high frequency and low frequency components of load currents and their assignation to suitable source helps to reduce the transients during load variations. Also, one of the generators will be switched off when the total power demand goes below specified level and hence significant fuel savings can be achieved. The execution of proposed system is assessed through MATLAB/Simulink model and its validation by experimental test bench.
      PubDate: Dec 2019
  • Automatic Compaction Device for Composite Panel Production at Layup
           Process: A Case Study

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  M S Ismail   Kwan T K   M I Hussain   and Z Mohd Zain   The purpose of this paper is to design a new concept of an automatic compaction device for composite panel production at layup process in one of the aircraft composite panel manufacturers in Malaysia, known as Company A. The current compaction process in company A requires an implementation of an effective and automatic vacuum bagging/compaction process to replace the current manual way method. The objective is to implement an automatic device to be integrated with the current method in order to make it simpler and more efficient for the operators to do the compaction process. This method could avoid human error in compaction timer hence reducing completed panel defect rate. Vacuum bagging/compaction process is a very important process to consolidate the laminates into a composite. Hence it is important for the precision of vacuum pressure and timing for the compaction process. The automatic device is designed to do the compaction process according to the timer automatically. The approach of designing this device is to use timer and solenoid valve to control the vacuum and a timer with a microcontroller. This device implementation will also reduce the steps of compaction process compared to the current way of doing so in Company A. In addition, it is believed to reduce the redundancy of work of the operators and increase multitasking of the operator and yield of composite panel produced by the company
      PubDate: Dec 2019
  • Comparative Evaluation of Three-phase Voltage and Current Source Inverter
           in Renewable Energy System

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  S Y Chong   S A Azmi   and J H Leong   In the renewable energy power generation system, voltage source inverters (VSIs) are commonly used due to its stable operation, high efficiency and low cost. However, a dc-dc boost converter is necessary for VSI to operate has increased the system complexity. Thus, current source inverters (CSIs) has become an alternative of VSI due to its ability of voltage boosting and can provide a better output waveform. This paper presents a comparative evaluation of VSI and CSI focusing on topological circuits and basic operational parameters of these inverters. The performances of VSI and CSI are analyzed in MATLAB/Simulink focusing on two operational characteristics which are modulation index, ma and switching frequency, fsw. The performance of VSI and CSI are dependent on the modulation index, increasing ma increase the inverter efficiency. In term of switching frequency, it does not affect much on the efficiency of inverters, yet a normalized switching frequency of odd multiple of three provides better fundamental output and harmonic minimization. Furthermore, CSI presents its voltage boosting capability which can boost 6-27% within ma of 0.05-1.0 and using the same modulation technique, VSI and CSI have present duality relationship in term of output voltage and current wave shapes.
      PubDate: Dec 2019
  • Analysis on Topology of Grounding System Using Bentonite and Coconut Husk
           as Additive Material

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  N H Halim   M F Hairuddin   S N M Arshad   M Isa   Z Adzis   and A W Y Khang   Electrical grounding is a system to remove undesired electrical charge to the ground via grounding mass. The unwanted electrical charged maybe created due to grounding fault of electrical apparatus and transient. Without proper grounding system, any structure will have exposed to the risk that caused by fault current and lightning. This situation will contribute to the loss of life and damaging the equipment. The purpose of this research is to investigate the behavior of bentonite and coconut husk as additive material to improve the performance grounding system by reducing grounding resistance value. At the same time, the proposed grounding system is also installed in two different topologies which are the single driven rod as the first topology and the radial multiple driven rod as the second topology instead of the conventional method that installing multiple rod in straight line. After the installation process is completed, the measurement of grounding resistance work was conducted using fall of potential method and recorded within 64 days. The data gained then was compared and analyzed to identify the best material to be used as the grounding enhancement or additive material. The results obtained show that the Bentonite has better performance than coconut husk in reducing grounding resistance. This research also found that the new configuration of multiple driven rod topology was able to reduce grounding resistance compared to the single driven rod.
      PubDate: Dec 2019
  • Offshore Oil and Gas Platform Transient Over-voltages from Ground Fault on
           Ungrounded System

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  Alvin T L, Teo   and N N Barsoum   The High Resistance Ground was used at the oil and gas platforms because of the main reason of not having the process in the facility interrupted. There are cases where main high voltage contactor has tripped and disabled the process at satellite platforms due to the lightings module grounded. This is unacceptable to the daily production. In this paper it will discuss on the electrical distribution load flow analysis, capacitive charging system for the HRG designs and the single phase to ground fault control which is offered by the HRG systems. In the oil and gas platform, there is always a case where the ground fault occurs and causes disturbance to the process. With the 3 Generators (Solar Centaur 3125 MVA) power for the overall electrical distribution, all the equipment on the buses is prone to the faults. It has always been the challenge to control and eliminate or reduce the ground faults. The determination of the total system charging current (Ic) is important and thus determining the value of resistor that is able to limit the fault to ground. The limit of current is about 5-10A. This investigation also will compare and analyze the line to ground faults. Symmetrical components are usually widely used for the study of fault calculations.
      PubDate: Dec 2019
  • Optimization Based Integrated Fuzzy Logic PID Controller for Networked
           Controlled Systems (NCSs)

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  Debashish Pal   and Shiv Kumar Bhagat   Nowadays, real-time control networks are becoming an emerging trend in the application of several fields like in remote campaign telecasting. Networked control systems (NCSs) are denoted as spatially distributed systems where the actuators, controllers and sensors are linked over a common band-limited wireless/wired digital communication network. The communication of data in the network plays a pivotal role in a system for its accurate working and as such the network-induced delays becomes a major challenging factor in the transmission of data from one source to another source especially for systems with real-time applications. Therefore, this delay factor should be analyzed and improved further. To overcome this network-induced delay factor along with problems of packet dropouts, fault occurrence and also increasing the stability, a novel technique through this paper is proposed. Here, initially the parameter initialization is done and transmission of data in the network is estimated and evaluated by the use of PID controller which is responsible for estimating the delay factors at the time of communication of data between the nodes. Also, a fuzzy logic parameter is integrated with PID controller to get a measure of probabilistic delay and fault occurrence. Finally, output of this network system is improved by using a novel optimization technique like an improved grey wolf optimization and an enhanced whale optimization. Finally, the performance analysis is done and results thus obtained validates the utility of this method in terms of lower amount of delays with lesser packet dropouts and an enhanced accuracy level in comparison to the traditional methods.
      PubDate: Dec 2019
  • Performance Analysis of Animal Migration Optimization Algorithm in
           Extracting Solar Cell Double Diode Model Parameters

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  Mohamad Nor Othman   Baharudidn Ismail   and Zainuddin Mat Isa   Modeling solar cell involved the formulation of the current versus voltage (I − V ) non-linear curve. Obtaining the accurate model parameters value is important for better performance evaluation, simulation and control of solar cell and module. Extracting these values using traditional methods required more resources, therefore, the used of meta heuristic optimization method become an attractive choice. Some optimization algorithms have been used to estimate the model parameters. However, more investigation is needed to improve model estimation. In this paper, the performance of Animal Migration Optimization (AMO) technique in identifying the unknown parameters of solar cell double diode model is studied. A measurement data of a 57 mm diameter commercial (R.T.C. France) silicon solar cell is used to observe the performance of this algorithm and the consistency of accurately estimating various parameters. The results show that the estimated and experimental data are accurately fitted and certify a good agreement. Furthermore, comparative study among different parameter estimation techniques is presented to demonstrate the effectiveness of the proposed approach.
      PubDate: Dec 2019
  • Comparison Performance of Nine Level Multilevel Inverter Using Bipolar and
           Unipolar Switching Schemes

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  Maaspaliza Azri   Azrita Alias   Musa   Akmal Afiq Nazmudi   and Zulhani Rasin   Multilevel inverter structures have the advantages due to the ablility to operate at high dc-bus voltage. It is able to operate at higher power applications by using series connection of switching devices. In addition, multilevel inverter can generate output voltage with very low harmonic distortion and synthesis a staircase voltage waveform by having multiple voltage levels. Various multilevel inverter topologies are introduced; however, cascaded multilevel inverter is commonly used because it is easy to be implemented. In addition, multilevel inverter topologies are able to operate at lower switching frequency and it produces higher efficiency by producing lower switching dissipation. In this paper, MATLAB/Simulink is used to model the seven levels cascaded multilevel PWM inverter by using bipolar and unipolar switching techniques. The analysis of the cascaded multilevel inverter will be done on different types of non-linear loads such as R-load, RL-load and RC-load The THD of voltages and currents on each type of loads that are done and finally the results are compared.
      PubDate: Dec 2019
  • Improved Clustering Protocol to Balanced Energy Consumption in
           Heterogeneous Wireless Sensor Network

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5A  Santosh Vishnu Purkar   and Rajkumar S. Deshpande   Wireless Sensor Network (WSN) Scheme is a cost-effective approach to monitor the event remotely. However, the activity of WSN is totally dependent on the energy resource available with each and every node of the network. Thus to prolong the activity period of WSN, it is necessary to utilize the available energy systematically. This aim is well satisfied by the design of hierarchical clustering protocol. This article highlights the mechanism to balance the energy consumption (load balancing) inside WSN. Proposed protocol design follows energy aware heterogeneous network model and modified scheme of cluster head (CH) selection. Secondly, maintain the record for nodes utilized in the role of CH and its capability. Proposed approach explores energy utilization by rotating CH selection, and reduces the internal overheads in network management. Through this approach, we are able to improve the energy efficiency of WSN by clustering multilevel nodes. In this design, CH is selected based on node energy and relative distance attributes. Proposed protocol is simulated and validated with reference to energy based performance parameters. It’s been noted that proposed implementation outperforms the existing protocols in terms of stability period, residual energy, and lifetime of the network.
      PubDate: Dec 2019
  • Design of Photovoltaic System Using Buck-Boost Converter based on MPPT
           with PID Controller

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5  Osama Elbaksawi   Different models of the PV system containing many techniques of DC-DC converter are applied in this paper such as, buck converter, boost converter and buck- boost converter which are inserted to be close the power between PV array and load by varying its duty cycle, it is named maximum power point tracking (MPPT). This paper introduces four different techniques of the DC-DC converter controlled by MPPT. The first configuration is proposed as composing PV module connected to buck-boost converter controlled via incremental conductance MPPT algorithm, the system includes PID controller to reduce the error of output voltage. The second model is as the first without PID controller. The last two systems consisting of boost converter with MPPT control and with PWM technique. All studied methods are pretended by using Matlab/Simulink.
      PubDate: Dec 2019
  • Improved Dynamic Harmony Search Optimization for Economic Dispatch
           Problems with Higher Order Cost Functions

    • Abstract: Publication date:  Dec 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  5  Boudjella Houari   Laouer Mohammed   Bouzeboudja Hamid   Ayad Ahmed Nour El Islam   Mkattiri Sara   and Saad Abdallah   This paper presents a modified harmony search algorithm with dynamically varying bandwidth, named improved dynamic harmony search algorithm (IDHSA) for economic load dispatch (ELD) problems with higher cost functions. The economic load dispatch problem aims to schedule power outputs of the generating units to meet the system load demand at minimum cost while satisfying the equality and inequality constraints. In the IDHS algorithm, the key difference from the conventional HS algorithm is that bandwidth (BW) operator changes dynamically at every iteration. The IDHS algorithm is tested with two different cases of power systems without and with transmission losses. The obtained results prove the accuracy and the effectiveness of the IDHS algorithm in determining the best solution compared than other optimization methods recently published in the literature.
      PubDate: Dec 2019
  • Isolation Optimization Method on the Coupler

    • Abstract: Publication date:  Apr 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2A  Yudi Barnadi   M. Rozahi Istambul   Ajeng Mayang K S   and Savitri galih   In this type of radar pulses only have one antenna that is used to transmit and receive signals, it requires a duplexer that will function as a separator for both signals, this duplexer will isolate the transmitted signal and the received signal. The main component of the duplexer that plays a role in the regulation of isolation is the Coupler which is abbreviated as coupler. The performance of the Coupler can be seen from the characteristics of the parameters it has, namely: Isolation Characteristics, Insertion Loss, Return Loss, and Power Coupling. In this study, changes in the dimensions of the Coupler, changes in this size will affect the value of the isolation. If the isolation value gets smaller, the duplexer performance will be better. Coupler in this study is applied in the form of microstrip and substrate used FR-4 with a dielectric constant of 4.6, 1.3 mm thick and 3 GHz operating frequency. To do this work is done with the 2014 CST simulation software, from the results of simulation experiments obtained the isolation value of -67.786 dB.
      PubDate: Apr 2019
  • Location and Orientation Based Augmented Reality Mobile Application for
           Enhancing Heritage Landmark History and Information

    • Abstract: Publication date:  Apr 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2A  Savitri Galih   Sultan Iansyah   and Herdis Yudistira   Augmented Reality technology in Mobile Device can provide better experience for people to to access and gather information at the location of cultural heritage or tourism landmark point in cultural heritage and historical tourism. Currently, the AR implementation research in cultural aspect hardly explored about the sensing algorithm of the cultural object that ignite the AR and the algorithm's complexity in detail. In this paper, we we propose geodetic location based tracking algorithm that has low computational complexity compare to the object based tracking which required heavy computational complexity for image processing algorithm. Based on the testing and implementation evaluation, our application can mark the cultural heritage or historical landmark and overlay it with the story behind the place to enhance the visitor experience.
      PubDate: Apr 2019
  • Towards Interference Alignment for Distributed Large-Scale MIMO Hardware
           Architecture and Implementation

    • Abstract: Publication date:  Apr 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2A  Savitri Galih   Mohammed El-Absi   and Thomas Kaiser   Massive MIMO or Large Scale MIMO is a promising solution for achieving superior data rates in 5G communication systems. However it has limitation in term of scalability and coverage for users that has highly spatial separation. Distributed massive MIMO is expected to enhance these drawbacks. One main problem arises in this scheme is the MIMO interference channel conditon that can be coped by interference alignment algorithm. The main consideration for interference alignment algorithm in distributed Massive MIMO is to achieve low complexity precoding to eliminate interference channel condition and to design efficient hardware architecture for its implementation. Previous research regarding IA for Distributed Massive MIMO indicates that the complexity issues is still not widely discussed. This paper proposed the low complexity IA scheme for large scale MIMO system based on limited interferer and the implementation of low cost interference alignment and wireless synchronization for distributed MIMO using software defined radio hardware. From the simulation result it is shown that limited interferer IA algorithm achieve acceptable BER performance, i.e. in order of 10-3. The hardware implementation of the IA precoding matrix computation is also discussed and base on the experiment it is show that the proposed algorithm and architecture achieved higher hardware performance compared to the linear IA.
      PubDate: Apr 2019
  • Simulation of Low Noise Amplifier (LNA) of GEOS Satellite Signal Receiver
           for Mobile Terminal Satellite Application at S-Band Frequency

    • Abstract: Publication date:  Apr 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2A  Resa Pramudita   In this paper described the process of making a Low Noise Amplifier (LNA) for GEOS Satellite for terminal mobile satellite at S-Band frequence. Step process of LNA design are choosing the right Transistor, Making a biasing circuit of Transistor, searching the value of ZS and ZL, , and built an Impedance Matching of the Transistor. The choosen Transistor is ATF58143 from Avago Technology. Bias voltage were used to Transistor in order to make transistor working at its working area. At this condition, we get Noise Figure (NF) minimum at 0.4 dB and Maximum stable amplifying at 20.413 dB as a paramater of the optimum LNA. The design of LNA will be simulated using a software Advanced Design System (ADS).
      PubDate: Apr 2019
  • Analysis of Blank Spot Data in the Communication Area with the
           Geoprocessing Method in Southern West Java

    • Abstract: Publication date:  Apr 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2A  R. A. E. Virgana   and Dan Dani Hamdani   In this study, the southern part of West Java Province, especially along the southern coastline in Cianjur Regency (in part), Garut Regency, Tasikmalaya Regency, and Pangandaran Regency, has tremendous potential. For the southern path of West Java alone, 417.4 km connected, from the start of Sukabumi Regency to the west of West Java, to Pangandaran Regency in the east of West Java, the potential and uniqueness of almost all new roads along the southern path of West Java show the extraordinary beauty and natural resources of West Java. Almost all roads on this track it is very neat, new and sturdy bridges. The residents along the southern coastline of West Java have begun to be busy in fishing industries, farms, timber industries, and other industries. But the means of cellular communication, especially along this route, which was the object of research in this study, signals exist and do not exist. There are some 2G, some 3G, and 4G will begin to appear when entering Big cities such as Pameumpek and Pangandaran. This research is expected to be able to map all blank spot areas, cellular operator signal services, especially on the new road along the coast in South West Java to the east from the starting point east of Cianjur Regency to the west of Pangandaran Regency. Desimination tools using geographic information systems, the method used by geoprocessing will overlay regional maps, satellite maps, and cellular operator BTS signal maps.
      PubDate: Apr 2019
  • Augmented Reality Technology (AR) as Alternative Media for Promotional

    • Abstract: Publication date:  Apr 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2A  Hari Supriadi ST.   and M. Kom   The high demand of apartment for people living in the cities makes the property agencies to compete each other in selling their units with various amenities. However, media promotion is needed by the agencies to spread the detailed information regarding the apartments. 3D Technology is one of the options that can be used. The establishment of promotion application with 3D can be considered to be effective and efficient, because it can support much more detailed information toward people with its presentation. So potential buyers are interested in the products offered. With the current technological development, the merging of the visualization of 2D image objects can produce a 3D virtual object form one of them by using Augmented Reality technology. With the help of the open-source mobile devices that is Android. That way can facilitate the user to know the form of the apartment and the facilities that have been provided.
      PubDate: Apr 2019
  • Ecosystem Controlling Using Identification of Animal Based on Deep
           Learning and GLCM (Gray Level Co-occurrence Matrix) Method

    • Abstract: Publication date:  Apr 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2A  Ari Purno Wahyu   and Feri Sulianta   Indonesia is the largest country in Southeast Asia. Plantations in Indonesia are still traditionally and use irrigation systems that are housed in reservoirs and ponds. While plantations in West Java generally averaged near springs and near nature preserve locations, which has a benefit impact of the available amount of water. The negative impact is entry on areas by animals and pests, which will damage Plantation grounds and other agricultural land. The animals generally go down at night when the time of the harvest season arrives. Currently, prevention of destructive animals is done by making a trap, but it is very dangerous for animals and farmers. This can lead to more severe death and destruction, especially if the dead are protected animals. One of the safe technologies, which can be used is by installing camera in the plantation area. This system is connected with the computer remotely and can operate automatically. This system is equipped with data on all types of animals that are protected. The data is processed with the Deep Learning Method and GLCM. The system will identify the animal in the category of pests or not by recognizing the pattern, texture and posture of the animal, for example if the system distinguished the wild boar. This system is considered effective and does not interfere the ecosystem and animal habitat. The addition of thermal camera and remote sensing are very effective to monitor the condition of the plant. This system is effective reduce and avoid animals killing and able to control stability the ecosystem.
      PubDate: Apr 2019
  • Identification of Cellular Phone for Elderly Users: A Literature Review

    • Abstract: Publication date:  Apr 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2A  Anita Juraida   Annisa Maharani Sunyoto   Ima Ratnasari   and Nurlaela Nisfiani   Purpose: to identify the need of cellular phones for elderly users. Design/methodology/approach: Methodology is done through literature reviews from the relevant literature. Findings: The results of the study are that the elderly people have obstacles experience to the use of technology because physical and cognitive decline and lack of experience in using technology. Research limitations/implications: This study only identified the elderly as a whole, whereas the elderly had three types, namely the elderly group (55-65 years), the elderly group (65 years and over), and the high-risk elderly group which namely the elderly over 70 years of age. Practical implications: Research results can be input for cellular phone designers to make user friendly cellular phone. Originality/value: This research has added value to developing cellphone phones that are easy to use for the elderly.
      PubDate: Apr 2019
  • A New Approach for Control of Two-wheeled Mobile Robot

    • Abstract: Publication date:  Apr 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2  Zahra Khajenasir Jahromi   and Hamed Kharrati Shishavan   In this paper, a study of the GBOT1001 two wheeled mobile robot is presented. Linearized dynamic equations are used to design a controller for the inherently unstable mobile robot. A Fuzzy controller is designed for the robot to direct the orientation of the chassis. Then linear quadratic regulator is also incorporated into the closed-loop system. The parameters of the LQR controller are computed first with the trial and error methods then, with the aid of the Genetic Algorithm. The resulting controller is referred to as the Fuzzy-TE-LQR and Fuzzy-GA-LQR controller respectively. The closed-loop responses for both controllers are obtained via computer simulations. Simulation results show that the Fuzzy-GA-LQR controller exhibits a less oscillatory closed-loop response that is achieved with a reasonable control effort.
      PubDate: Apr 2019
  • Optimal Location and Parameter Settings of UPFC Using ACO for Enhancing
           Power System Security under Single Contingencies

    • Abstract: Publication date:  Apr 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2  MD. Yaseen   and T. Anil Kumar   Optimal setting and location of Flexible AC Transmission Systems (FACTS) devices are widely used in enhancing power system security. The most effective FACTS device is Unified Power Flow Controller (UPFC) which has both series and shunt compensation. The effectiveness of FACTS device over the mitigation of security issues depends on its location and its parameter settings. Hence, this paper presents Ant Colony Optimization (ACO) methodology to optimally locate UPFC to enhance power system security under single contingencies (N-1 Contingency). The simulation is carried out on IEEE 6 bus and IEEE 14 bus test systems considering line over loads and bus voltage violations for ensuring system security. This approach is twofold. Initially, an N-1 contingency test is performed based on severity ranking is done then UPFC is placed optimally using ACO algorithm to mitigate the severity. Further to validate the proposed approach the results are compared with the conventional Non Linear Programming – Interior Point (NLP-IP) technique.
      PubDate: Apr 2019
  • Particle Swarm Optimization Algorithms for Two-stage Hybrid Flowshop
           Scheduling Problem with No-wait

    • Abstract: Publication date:  Apr 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2  Mageed A. Ghaleb   and Ibrahim M. Alharkan   Hybrid flowshop scheduling problems have attracted much attention owing to their wide applications in a variety of real-world problems. In some industries, products cannot be allowed to wait between any consecutive productions stages, which illustrates the importance of studying the no-wait constraint. One of the reasons for such a constraint is that, for some products, the waiting time could cause permanent damage. However, the no-wait constraint was neglected in many prior studies, which in some production environments may not be allowed. Minimizing the total tardiness plays a key role in making scheduling decisions to meet customers' due dates. In this study, we solve the no-wait two-stage hybrid flowshop scheduling problem with total tardiness minimization as an optimizing criterion. We formulated the problem mathematically and proposed two discrete versions of the particle swarm optimization (PSO) to solve it. Moreover, three discrete versions of PSO are adopted from previous studies and used as benchmarks to test the effectiveness of the two proposed algorithms. Compared to the benchmark algorithms, the results showed that the two newly proposed algorithms were effective and performed better than the benchmark algorithms in terms of the average relative error. The current study represents one of the few attempts to investigate the considered problem with total tardiness minimization, as well as introducing new and effective discrete versions of the PSO algorithms to solve the problem under investigation.
      PubDate: Apr 2019
  • Study and Design of a Full Bridge DC / DC Power Converter

    • Abstract: Publication date:  Apr 2019
      Source:Universal Journal of Electrical and Electronic Engineering  Volume  6  Number  2  E. Baghaz   S. Bounouar   R. Bendaoud   B. Zohal   N. K. M'Sirdi   A. Naamane   N. Benaya   N. El Akchioui   and M. Benhmida   In this paper, a converter DC/DC for power applications is developed: battery charger for photovoltaic system, vehicle charger, helicopter power supply. It consists of using a Full-Bridge DC/DC converter which is controlled by a new analog control, designed and analyzed during this work. This control has been dimensioned so that it ensures a smooth switching of the transistors, which makes it possible to reduce the losses of power, and consequently increases the efficiency of the overall system. It allows also to increase the current and to lower the voltage to the desired value; a large generated current which reaches 50A.
      PubDate: Apr 2019
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