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30,033 Article Results

Design of Neuro-Fuzzy Controller for Stabilization of Single Phase Stand-Alone PV Power System

10.11591/ijra.v7i3.pp176-184
Hitendra Singh Thakur , Ram Narayan Patel
For the three phase power electronic and drive applications, vector control or the synchronous reference frame (SRF) based control concept is well accepted and settled amongst the research communities. Although the SRF concept has gained popularity and appreciation in developing the three phase controllers, still the concept has not reached the same level in case of a single phase system. The work presented in this paper is mainly concerned to the design of a hybrid Artificial Neural Network and Fuzzy Logic based controller for a single phase stand-alone photo-voltaic (PV) power system. The adaptive neuro fuzzy inference system (ANFIS) controller proposed in this paper is chiefly meant for improving the transient and steady state responses; for minimizing the distorting effect of the low order load current harmonics encountered particularly in case of switching the drive based inductive loads and to help maintain the inverter output voltage constant under different loading circumstances. The result obtained through simulation work, shows the effectiveness of the proposed controller as compared with the previously established research works.
Volume: 7
Issue: 3
Page: 176-184
Publish at: 2018-09-01

Integration of Syrian Refugees and Turkish Students by Non Formal Education Activities

10.11591/ijere.v7i3.14118
Rüyam Küçüksüleymanoğlu
While 80 percent of Syrian refugee children living in camps have chance to attend formal education, only small number of children are attending Turkish schools. The purpose of this research is to investigate the opinions of the Syrian refugee children before and after non formal education (NFE) activities about refugees’ integration at school. For this purpose, certain activities were created and organized by the researcher. The research was conducted in the selected public school with 73 Syrian children and lasted for 28 weeks. Semi-structured interview and observation methods were used in this study. The data were analysed using content analysis. The findings obtained from the study have been organized into 3 main themes. These themes are “language”, “coping and resolving conflict” and “joining a group and sustaining friendship”. As a result of the study, it has been determined that Syrian children can cope with the problems they are experiencing and integrate into the school life and Turkish students being more helpful and tolerant towards the refugees are influenced by non formal education activities conducted in school. It is hoped that it will be a good example for each school in designing educational programs for Syrian refugee children with NFE activities.
Volume: 7
Issue: 3
Page: 244-252
Publish at: 2018-09-01

IMT Skills of the pre-service teachers in Cebu City

10.11591/ijere.v7i3.14203
Helen B. Boholano
Information, media and technology is an essential skill in the 21st century. The development of the country relies on the people. The preservice teachers are task to mold the 21st century learners. The purpose of this study is to investigate and analyze the information, media and technology skills in the 21st century of the preservice teachers in the different Higher Education Institutions (HEIs) in Cebu City. Findings revealed that the preservice teachers possessed very IMT good skills.  There are three themes formulated regarding the effects of new digital technologies in the 21st century instruction. Making taking and learning more convenient with the use of technology, the 21st century role of modern technology in teaching and learning and using technology as tool in research are essential in the 21st century undertakings. Thus, ICTs have been very useful in the teaching-learning process and it has been the modernize way of education which caught the interest of everybody. The effective use of technology enables the preservice teachers to facilitate and adjust their instructional strategies to optimize students’ learning.
Volume: 7
Issue: 3
Page: 212-220
Publish at: 2018-09-01

Modelling and Passivity-Based Control of a Non Isolated DC-DC Converter in a Fuel Cell System

10.11591/ijra.v7i3.pp197-204
Moutabir Ahmed , Abdelmounim Elhassane , Aboulfatah Mohamed
This paper presents the model of a fuel cell and the design and simulation of a cascade of two DC-DC converters. First, a detailed mathematical model of fuel cell is presented and simulated. Then, a nonlinear model of the whole controlled system is developed and a robust nonlinear controller of currents is synthesized using a passivity-based control. A formal analysis based on Lyapunov stability and average theory is developed to describe the control currents loops performances. A classical PI controller is used for the voltages loops. The simulation models have been developed and tested in the MATLAB / SIMULINK. Simulated results are displayed to validate the feasibility and the effectiveness of the proposed strategy.
Volume: 7
Issue: 3
Page: 197-204
Publish at: 2018-09-01

GWO Based Optimal Reactive Power Coordination of DFIG, ULTC and Capacitors

10.11591/ijeecs.v11.i3.pp805-813
Mogaligunta Sankaraiah , Sanna Suresh Reddy , M Vijaya Kumar
Wind is available with free of cost anywhere in the world, this wind can be used for power generation due to many advantages. This attracts the researchers to work on wind power plants. The presence of wind power plants on distribution system causes major influence on voltage controlled devices (VCDs) in terms of life of the devices. Therefore, this paper proposes grey wolf optimization method (GWO) together with forecasted load one day in advance. VCDs are on load tap changer (ULTC) and capacitors (CS), there are two main objectives first one is curtail of distribution network (DN) loss and second one is curtailing of ULTC and CS switching’s. Objectives are achieved by controlling the reactive power of DFIG in coordination with VCDs. The proposed method is planned and applied in Matlab/Simulink on 10KV practical system with DFIG located at different locations. To validate the efficacy of GWO, results are compared with conventional and dynamic programming methods without profane grid circumstances.
Volume: 11
Issue: 3
Page: 805-813
Publish at: 2018-09-01

Implement the Harmonic Search Algorithm with Optimum Location of Capacitors Sizing and Dispatchable DGs to Control the Reactive Power on Interconnected Bus System

10.11591/ijra.v7i3.pp149-158
M. Suneetha , R.Srinivasa Rao , B. Subramanyam
Power system is combination of generation, transmission and Distribution Network. In modern trends power system operation is very difficulty due to energy storage elements, and variable inductive load. In power system, control the reactive power is essential to maintain the safe and more reliability of power system operation. In this paper, to organize the real power and reactive power by optimizing and sizing of capacitors and Dispatchable  Distribution generators in a distribution network with help of Harmonic Search Algorithm. The constraints of power system like voltage, real power and reactive and branch current carrying capacity are included in the evaluation of the objective function. To validate  planned development network an IEEE 30 bus investigation system is considered.
Volume: 7
Issue: 3
Page: 149-158
Publish at: 2018-09-01

Activities Written by Prospective Primary Teachers on Realistic Mathematics Education

10.11591/ijere.v7i3.14267
Hatice Kübra Güler
It is important for students to connect with real life in mathematics courses. The aim of this study is to investigate the activities which are written by prospective primary school teachers in the context of Realistic Mathematics Education. This research is a case study of which data were collected by qualitative methods. The participants of the research included 81 prospective primary teachers who are junior students attended primary teacher department. It was asked them to write an activity suitable for primary mathematics curriculum by considering Realistic Mathematics Education principles. They were given one month to write the activities. The activities written by prospective teachers analyzed by descriptive methods in terms of learning domains, types of context and principles of Realistic Mathematics Education. Totally 36 activities were written by prospective teachers. Based on the analysis, it was observed that not all the contexts were exactly real life contexts. It was determined that prospective teacher could not distinguish routine word problems from real life problems. It can be said that theoretical knowledge of Realistic Mathematics Education is inadequate for writing activities and prospective primary teachers need to practice on writing activities regarding the mentioned theory.
Volume: 7
Issue: 3
Page: 229-235
Publish at: 2018-09-01

Linear and Non-Linear Control Design of Skid Steer Mobile Robot on an Embedded

10.11591/ijra.v7i3.pp185-196
Jharna Majumdar , Sudip C Gupta , B Prassanna Prasath
A detailed approach for a linear Proportional-Integral-Derivative (PID) controller and a non-linear controller - Linear Quadratic Regulator (LQR) is discussed in this paper. By analyzing several mathematical designs for the Skid Steer Mobile Robot (SSMR), the controllers are implemented in an embedded microcontroller - Mbed LPC1768. To verify the controllers, MATLAB-Simulink is used for the simulation of both the controllers involving motors - Maxon RE40. This paper compares between PID and LQR controller along with the performance comparison between Homogenous and Non-Homogenous LQR controllers.
Volume: 7
Issue: 3
Page: 185-196
Publish at: 2018-09-01

Do Mobile Technology in the Classroom Really Improve Learning Outcomes?

10.11591/ijere.v7i3.13426
Shazia Zaheer , Saad Masood Butt , Gnevasheva Vera Anatolyevna , Hosna Salmani
This article aims to outline different pedagogical strategies with applications (apps) in the classroom. Every year the use of mobile devices like tablets and smartphones increases. At the same time, applications are being developed to meet this demand. It is therefore essential that educators investigate their use as an motivational technological medium that can possibly be used in the classroom. Apps can be used both as a source of information as well as a tool for creating material. Thus, this article will present the results of a study applying teaching strategies in different contexts. It therefore highlights the importance of mobile learning as a viable alternative in the classroom. In order to do so, there was a multiple case study in the undergraduate pedagogy program and a digital inclusion course for seniors, both offered in the first semester of 2017 at the Federal University of Rio Grande do Sul (UFRGS). Educational applications and examples of teaching strategies using apps were created in these classes. Educational applications offer the possibility to bring innovations to teaching practices, as well as new forms of communication, interaction and authorship, thus contributing to the process of teaching and learning.
Volume: 7
Issue: 3
Page: 188-193
Publish at: 2018-09-01

Dynamic Control of Mobile Robot Using RBF Global Fast Sliding mode

10.11591/ijra.v7i3.pp159-168
Ali Mallem , Noureddine Slimane , Walid Benaziza
This paper mainly In this paper a dynamic control of mobile robot using RBF global fast sliding mode (RBF-GFSM) strategy is presented. Firstly a GFSM controller is used in order to make the linear and angular velocities converge to references ones in finite time. However a problem of instability of velocities is appeared by introducing disturbances in the system. Secondly, a combined controller using RBF-GFSM approach is applied in aim to stabilize the velocities errors and estimates the nonlinear function of the robot model. The system stability is done using the lyapunov theory. The proposed controllers are dynamically simulated using Matlab/Simulink and the simulations results show the efficiency and robustness of the proposed control strategy.
Volume: 7
Issue: 3
Page: 159-168
Publish at: 2018-09-01

A Survey of Video Based Action Recognition in Sports

10.11591/ijeecs.v11.i3.pp987-993
Nur Azmina Rahmad , Muhammad Amir As'ari , Nurul Fathiah Ghazali , Norazman Shahar , Nur Anis Jasmin Sufri
Sport performance analysis which is crucial in sport practice is used to improve the performance of athletes during the games. Many studies and investigation have been done in detecting different movements of player for notational analysis using either sensor based or video based modality. Recently, vision based modality has become the research interest due to the vast development of video transmission online. There are tremendous experimental studies have been done using vision based modality in sport but only a few review study has been done previously. Hence, we provide a review study on the video based technique to recognize sport action toward establishing the automated notational analysis system. The paper will be organized into four parts. Firstly, we provide an overview of the current existing technologies of the video based sports intelligence systems. Secondly, we review the framework of action recognition in all fields before we further discuss the implementation of deep learning in vision based modality for sport actions. Finally, the paper summarizes the further trend and research direction in action recognition for sports using video approach. We believed that this review study would be very beneficial in providing a complete overview on video based action recognition in sports.
Volume: 11
Issue: 3
Page: 987-993
Publish at: 2018-09-01

Developed Z-Source H-Bridge Multilevel Inverter with Reduced Components for Speed Control of Induction Motor

10.11591/ijra.v7i3.pp205-214
C. L.Kuppuswamy , T. A. Raghavendiran
This paper introduces a new developed H-bridge based cascaded multilevel inverter with reduced components. This topology has a low complexity thereby reducing the overall cost of an inverter. The proposed circuit is connected with a PI controller and switches are controlled by pulse width modulation technique to control the speed of an induction motor. The simulation was carried out using Matlab / Simulink. The simulation of the same was made and performance of various PWM techniques such as Phase disposition (PD), Phase opposite disposition (POD) and phase shifted (PS) and there results were compared on different quantitative measures such as Voltage, current stator Total harmonic Distortion, Voltage stress and rise time. It was observed that that the proposed power circuit with Phase disposition pulse width modulation (PDPWM) that offers reduced total harmonic Detection in terms of voltage, current and phase was found to be very less when compared to other Pulse width modulation techniques. The simulation results will have a fast and quick rise time thereby making this inverter a choice for speed control of induction motor.
Volume: 7
Issue: 3
Page: 205-214
Publish at: 2018-09-01

Key Escrow with Elliptic Curve Cryptography – Conceptual Framework for Distributed Mobile Networks

10.11591/ijeecs.v11.i3.pp1060-1067
B. Sugumar , M. Ramakrishnan
In the large scale distributive environment involving mobile network, metadata server and storage applications, the data access and the security measures are of paramount importance. In parallel application processing, data is distributed across multiple servers and storage location. Ensuring confidentiality and availability of the data to the authorised users at the appropriate time involves high level of encryption algorithms, key management schemes and security algorithms. In this paper, key escrow scheme is implemented with the light weighted symmetric algorithm, elliptic curve cryptography in the distributed environment. Key escrow centre is established along with the metadata server and the encryption keys are segmented and shared among the multiple sub agents using Shamir threshold sharing scheme. The implementation of Key Escrow mechanism with Elliptical Curve Cryptography provides wide range of flexibility and confidentiality in the distributed environment. It also eliminates private secret sub key problem and thereby ensuring better security.
Volume: 11
Issue: 3
Page: 1060-1067
Publish at: 2018-09-01

An Effective Pre-Processing Phase for Gene Expression Classification

10.11591/ijeecs.v11.i3.pp1223-1227
Choon Sen Seah , Shahreen Kasim , Mohd Farhan Md Fudzee , Mohd Saberi Mohamad , Rd Rohmat Saedudin , Rohayanti Hassan , Mohd Arfian Ismail , Rodziah Atan
A raw dataset prepared by researchers comes with a lot of information. Whether the information is usefull or not, completely depends on the requirement and purposes. In machine learning, data pre-processing is the very initial stage. It is a must to make sure the dataset is totally suitable for the requirement. In significant directed random walk (sDRW), there are three steps in data pre-processing stage. First, we remove unwanted attributes, missing value and proper arrangement, followed by normalization of the expression value and lastly, filtering method is applied. The first two steps are completed by Bioconductor package while the last step is works in sDRW.
Volume: 11
Issue: 3
Page: 1223-1227
Publish at: 2018-09-01

Solving N-Queens Problem Using Subproblems based on Genetic Algorithm

10.11591/ijai.v7.i3.pp130-137
Ismail. A. Humied
Nowadays, permutation problems with large state spaces and the path to solution is irrelevant such as N-Queens problem has the same general property for many important applications such as integrated-circuit design, factory-floor layout, job-shop scheduling, automatic programming, telecommunications network optimization, vehicle routing, and portfolio management. Therefore, methods which are able to find a solution are very important. Genetic algorithm (GA) is one the most well-known methods for solving N-Queens problem and applicable to a wide range of permutation problems. In the absence of specialized solution for a particular problem, genetic algorithm would be efficient. But holism and random choices cause problem for genetic algorithm in searching large state spaces. So, the efficiency of this algorithm would be demoted when the size of state space of the problem grows exponentially. In this paper, the subproblems used based on genetic algorithm to cover this weakness. This proposed method is trying to provide partial view for genetic algorithm by locally searching the state space. This method works to take shorter steps toward the solution. To find the first solution and other solutions in N-Queens problem using proposed method: dividing N-Queens problem into subproblems, which configuring initial population of genetic algorithm. The proposed method is evaluated and compares it with two similar methods that indicate the amount of performance improvement.
Volume: 7
Issue: 3
Page: 130-137
Publish at: 2018-09-01
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