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Publisher: Horizon Research Publishing   (Total: 54 journals)   [Sort by number of followers]

Showing 1 - 54 of 54 Journals sorted alphabetically
Advances in Diabetes and Metabolism     Open Access   (Followers: 29)
Advances in Economics and Business     Open Access   (Followers: 19)
Advances in Energy and Power     Open Access   (Followers: 18)
Advances in Pharmacology and Pharmacy     Open Access   (Followers: 10)
Advances in Signal Processing     Open Access   (Followers: 13)
Advances in Zoology and Botany     Open Access  
Bioengineering and Bioscience     Open Access   (Followers: 1)
Cancer and Oncology Research     Open Access   (Followers: 10)
Chemical and Materials Engineering     Open Access   (Followers: 35)
Civil Engineering and Architecture     Open Access   (Followers: 27)
Computational Research     Open Access   (Followers: 1)
Computer Science and Information Technology     Open Access   (Followers: 14)
Energy and Environmental Engineering     Open Access   (Followers: 7)
Environment and Ecology Research     Open Access   (Followers: 9)
Food Science and Technology     Open Access   (Followers: 3)
Immunology and Infectious Diseases     Open Access   (Followers: 9)
Intl. J. of Biochemistry and Biophysics     Open Access   (Followers: 1)
Intl. J. of Cardiovascular and Cerebrovascular Disease     Open Access   (Followers: 2)
Intl. J. of Neuroscience and Behavioral Science     Open Access   (Followers: 1)
Linguistics and Literature Studies     Open Access   (Followers: 6)
Manufacturing Science and Technology     Open Access   (Followers: 3)
Mathematics and Statistics     Open Access   (Followers: 5)
Nanoscience and Nanoengineering     Open Access   (Followers: 1)
Natural Resources and Conservation     Open Access   (Followers: 5)
Nursing and Health     Open Access   (Followers: 4)
Open J. of Dentistry and Oral Medicine     Open Access   (Followers: 1)
Sociology and Anthropology     Open Access   (Followers: 5)
Sport and Art     Open Access   (Followers: 1)
Universal J. of Accounting and Finance     Open Access   (Followers: 4)
Universal J. of Agricultural Research     Open Access   (Followers: 1)
Universal J. of Applied Mathematics     Open Access   (Followers: 5)
Universal J. of Applied Science     Open Access   (Followers: 2)
Universal J. of Biomedical Engineering     Open Access  
Universal J. of Chemistry     Open Access   (Followers: 1)
Universal J. of Clinical Medicine     Open Access  
Universal J. of Communications and Network     Open Access   (Followers: 1)
Universal J. of Computational Mathematics     Open Access   (Followers: 5)
Universal J. of Control and Automation     Open Access   (Followers: 4)
Universal J. of Educational Research     Open Access   (Followers: 1)
Universal J. of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Universal J. of Engineering Science     Open Access   (Followers: 2)
Universal J. of Food and Nutrition Science     Open Access   (Followers: 6)
Universal J. of Geoscience     Open Access   (Followers: 4)
Universal J. of Industrial and Business Management     Open Access   (Followers: 1)
Universal J. of Management     Open Access   (Followers: 2)
Universal J. of Materials Science     Open Access   (Followers: 3)
Universal J. of Mechanical Engineering     Open Access   (Followers: 17)
Universal J. of Medical Science     Open Access  
Universal J. of Microbiology Research     Open Access  
Universal J. of Physics and Application     Open Access   (Followers: 2)
Universal J. of Plant Science     Open Access   (Followers: 1)
Universal J. of Psychology     Open Access   (Followers: 3)
Universal J. of Public Health     Open Access   (Followers: 3)
World J. of Computer Application and Technology     Open Access   (Followers: 4)
Similar Journals
Journal Cover
Universal Journal of Electrical and Electronic Engineering
Number of Followers: 6  

  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]
  • Intermediate Programming Methodologies for Manipulating Modern Humanoid
           Robots

    • Abstract: Publication date:  Sep 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: Sep 2019
       
  • Optimization of the Performance of Biosensor Based on Photonic Crystal
           Resonant

    • Abstract: Publication date:  Sep 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: Sep 2019
       
  • Comparison of Fractional Order PID Controller and Sliding Mode Controller
           with Computational Tuning Algorithm

    • Abstract: Publication date:  Sep 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: Sep 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
           Electrode

    • 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
           Programmers

    • 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   Octarina Nur Samijayani   Ary Syahriar   Rizki Ramdhani   and Rahmat Alamtaha   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
           Devices

    • 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
           Computing

    • 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
       
  • 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
           Product

    • 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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