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29,734 Article Results

Does Emotional Intelligence Affect Social Adjustment Ability among Primary School Students?

10.11591/ijere.v7i4.14272
Suyatno Suyatno , Khairil Nur Hidayat
The aim of this research was to find out the impact of emotional intelligence to the social adjustment ability of the primary students in Muhammadiyah Karangwaru Yogyakarta Elementary School. The population involved in this research is all of the 5th grade students of Muhammadiyah Karangwaru Yogyakarta, who are 80 students. The sampling technique used here was Sampling Jenuh which then resulted 54 students as the samples of the research. The writer used questionnaire in collecting the data of the research. The approach used in the research was expost facto quantitative. Meanwhile in analyzing the data, the writer used simple regression test and test requirement. The result of the reserach shows that there is a positive and significant impact of emotional intelligence towards the social adjustment ability of the students. The acceptance hypothesis is showed through regression anlysis of Fcal which is 21.495 with significancy is 0.000. It can be defined that the ability of the students’ social adjustment can be improved through the improvement of their emotional intelligence. Based on the research result, this research suggests that it would be better if the learning process in the school gives more focus on the emotional intelligence formation which can affect to the development of social adjustment ability of the students. It is because the social adjustment ability constitutes a predictor of someone’s successful life in the future.
Volume: 7
Issue: 4
Page: 270-278
Publish at: 2018-12-01

A Single Switch Parallel Quasi Resonant Converter Topology for Induction Heating Application

10.11591/ijpeds.v9.i4.pp1718-1724
V. Geetha , V. Sivachidambaranathan
In this paper 32 KHZ Single phase Single switch Parallel Resonant converter topology (SSPR) using power MOSFET is simulated using MATLAB simulink for the different duty cycle and the THD, Power with respect to change in duty cycle is compared . The workingcoil is the combination of R, L in parallel with C which produces the output power of 1.7KW to 3KW with variation in duty cycle at higher value in duty cycle we get less THD and more power. The operating frequency is selected nearer to the resonant frequency for the improvement performance. The experimental set up of this SSPR Inverter in the induction heating application for the domestic purpose is implemented is depicted and this validates the implementation of quasi resonant using IGBT for domestic applications.
Volume: 9
Issue: 4
Page: 1718-1724
Publish at: 2018-12-01

Single Phase Power Generation System from Fuel Cell

10.11591/ijpeds.v9.i4.pp1676-1684
Nageswara Rao Kudithi , Sakda Somkun
Power conditioning circuits are required for the fuel cell systems due to its nature in energetic state. This paper proposed the small signal average modelling of a duel active bridge (DAB) DC-DC converter with LC filter, to generate the single phase AC power by using the H1000 fuel cell system. The controller is designed for the stable operation of the system. Implemented the controller, which gives the constant output voltage to DC-bus from the DAB DC-DC converter, this DC-bus voltage fed to the inverter, which inverts the DC-bus voltage to single Phase AC power with the LC-filter. The proposed system simulated in the MATLAB/Simulink.
Volume: 9
Issue: 4
Page: 1676-1684
Publish at: 2018-12-01

Design and Development of Grid-connected Quasi-Z-Source PV Inverter

10.11591/ijpeds.v9.i4.pp1989-2005
Zulhani Rasin , Muhammed Fazlur Rahman , Maaspaliza Azri , Md Hairul Nizam Talib , Auzani Jidin
An inverter system applied with the PV source typically has a problem of lower input voltage due to constraint in the PV strings connection. As a countermeasure a DC-DC boost converter is placed in between to achieve a higher voltage at the inverter DC link for connection to the grid and to realize the MPPT operation. This additional stage contributes to losses and complexity in control thus reducing the overall system efficiency. This work discussed on the design and development of a grid-connected quasi-Z-source PV inverter which has different topology and control method compared to the conventional voltage source inverter and able to overcome the above disadvantages. Modelling and performance analysis of the voltage and current controller to achieve a good power transfer from the PV source, as well sycnchronization with the grid are presented in detail. Results from both simulation and experimental verification demonstrate the designed and developed grid-connected qZSI PV inverter works successfully equivalent to the conventional voltage source inverter system.
Volume: 9
Issue: 4
Page: 1989-2005
Publish at: 2018-12-01

Dwindling of Real Power Loss by Enriched Big Bang-Big Crunch Algorithm

10.11591/ijai.v7.i4.pp190-196
K. Lenin
In this paper, Enriched Big Bang-Big Crunch (EBC) algorithm is proposed to solve the reactive power problem. The problem of converging to local optimum solutions occurred for the Bang-Big Crunch (BB-BC) approach due to greedily looking around the best ever found solutions. The proposed algorithm takes advantages of typical Big Bang-Big Crunch (BB-BC) algorithm and enhances it with the proper balance between exploration and exploitation factors. Proposed EBC algorithm has been tested in standard IEEE 118 & practical 191 bus test systems and simulation results show clearly the improved performance of the proposed algorithm in reducing the real power loss.
Volume: 7
Issue: 4
Page: 190-196
Publish at: 2018-12-01

The Effects of Pre-service Teachers’ Cognitive Styles on Learning Approaches

10.11591/ijere.v7i4.15737
Sedat Altıntaş , İzzet Görgen
The main purpose of the study is to investigate the effects of prospective teachers’ cognitive styles on learning approaches. It is aimed to define whether exist significance differences between defining prospective teachers’ cognitive styles and learning approaches and demographic variables within the scope of the mean purpose. The study, designed according to correlational survey model, was conducted at Mugla Sitki Kocman University, Faculty of Education in the 2014-2015 academic year spring semester. As data collection instruments, “The Group Embedded Figures Test” was administered to define prospective teachers’ cognitive style in the study. On the other hand “The Revised Two Factor Study Process Questionnaire” was used to reveal prospective teachers’ learning approaches. According to the findings, prospective teachers generally have field dependent cognitive style. It is determined that between with prospective teachers’ gender and academic success and cognitive style scores there isn’t any significant difference revealed. However, there is significant difference between branches and cognitive style scores. It has been viewed that prospective teachers prefer deep learning approach generally. There isn’t significant difference between gender and learning approaches yet there is significant difference between learning approaches-branches and academic success. It is also concluded that as prospective teachers’ cognitive styles approaches to field independent, deep learning approach preference of prospective teachers has diminished.
Volume: 7
Issue: 4
Page: 285-293
Publish at: 2018-12-01

Using the Five-Level NPC Inverter to Improve the FOC Control of the Asynchronous Machine

10.11591/ijpeds.v9.i4.pp1457-1466
Mouna Es-Saadi , Mohamed Khafallah , Hamid Chaikhy
Many researches have been dedicated to develop the induction motor drive control strategy used on the railway traction applications. In this paper we propose to investigate and to improve the electric locomotives by using a Field Oriented Control (FOC) strategy of induction motor drive. This induction motor can be powered by a five-stage neutral point inverter controlled by sinusoidal pulse width modulation (SPWM) due to good quality for output voltage and The use of fast switches. Both conventional and improved locomotives are simulated in Matlab/Simulink and compared in open loop conditions   and closed loop conditions using IP controller, in term of torque response, current harmonic distortions and rotor speed response.
Volume: 9
Issue: 4
Page: 1457-1466
Publish at: 2018-12-01

Design of Maximum Power Point Tracking for Solar Collector Drying System: An Experimental Study

10.11591/ijpeds.v9.i4.pp1799-1803
Saifuddin M. Jalil , Faizar Abdurrahman , Selamat Meliala , Rosdiana Rosdiana
This research describes the performance of maximum power point tracking as a solar collector of PV system integration for agriculture product drying system. The system comprises of solar collector, tracking PV array, the battery bank, the micro controller and the DC converter. This system is design to enhance the work of solar collector in drying process.. This design is hoped to be an appropriate system in order to ensure the maximum result by providing solar radiation energy. This paper shows the experiment data of the voltage and power response in positioning the PV to yield a maximum photovoltaic array output power of solar drying system device.
Volume: 9
Issue: 4
Page: 1799-1803
Publish at: 2018-12-01

Outdoor Performance Evaluation of Building Integrated Photovoltaic Thermal (BIPVT) Solar Collector with Spiral Flow Absorber Configurations

10.11591/ijpeds.v9.i4.pp1918-1925
Adnan Ibrahim , Sohif Mat , Ahmad Fazlizan Abdullah , Ahmad Fudholi , Kamaruzzaman Sopian
Building Integrated Photovoltaic thermal solar collector (BIPVT) with Spiral flow absorber design is a collector not only used to generate electricity and thermal energy simultaneously but also can be integrated with the roof. Due to it characteristic as a roof, the collector is exposed to the direct sunlight resulting from a higher temperature on it surfaces. The temperature increased will simultaneously decrease it efficiency. An experiment has been conducted outdoor at Universiti Kebangsaan Malaysia to examine and evaluate the efficiency of the collector. Data for the experiment has been collected and gathered from 08:00 to 17:00 respectively. Results from the experiment recorded the best total efficiency of 65.10% (53.64% thermal efficiency and 11.46% electrical efficiency from the PV panel) at mass flow rate of 0.041kg/s and solar radiation of 1148W/m2. The effect of mass flow rates on open circuit voltage (Voc) and the modules short circuit current (Isc) are also presented.
Volume: 9
Issue: 4
Page: 1918-1925
Publish at: 2018-12-01

Improvement Potential and Exergy Analyses of Photovoltaic Thermal with and without ∇-absorber Collector

10.11591/ijpeds.v9.i4.pp1792-1798
Saprizal Hadisaputra , Muhammad Zohri , Hardani Hardani , Ahmad Fudholi
The combination of a solar thermal and photovoltaic system is called photovoltaic thermal system (PVT). The PVT system with and without -absorber has been intended to harvest both hot air and electricity. The hot air that is produced is used in the cooling process of the photovoltaic panel and then to improve the efficiency of the photovoltaic panel. The experimental investigation was conducted at the mass flow rate from 0.0069 kg/s to 0.0491 kg/s and solar radiation of 522 W/m2 and 820 W/m2 in the National University of Malaysia. The using -absorber collector increases exergy and exergy efficiency of PVT system. The improvement potential comparatively upsurges with cumulative the mass flow rate.
Volume: 9
Issue: 4
Page: 1792-1798
Publish at: 2018-12-01

Modeling Solar Modules Performance Under Temperature and Solar Radiation of Western Iraq

10.11591/ijpeds.v9.i4.pp1842-1850
Zaid Hussein Ali , Abdullah Khalid Ahmed , Amer Tayes Saeed
This paper demonstrates a mathematical representation of Photovoltaic (PV) solar cells and hence panels performance. One-diode solar cell model is implemented to simulate the cell and extract the performance indications. The tested PV modules are BP Solar (60 Watt) and Synthesis Power (50 Watts), which are operating in a PV generation system in the University of Anbar - Iraq, College of Applied Sciences. The math model demonstrates Power versus Voltage (P-V) characteristic curves to depict and study various parameters with affecting variations in the PV array performance. The parameters include ambient and cell temperature degrees and solar irradiance (G) level which are the main elements to dictate the productivity of a solar system. G is represented by sun unit (1 sun=1 kW/m2). The outcomes of the simulation model characteristics curves have been compared with curves provided by the tested modules data sheets. MATLAB software has been used to simulate the model and extract the results. This paper also investigated photovoltaic simulation with maximum power point tracking (MPPT) converter to evaluate hence predict the behaviors of the whole photovoltaic DC current generation using PSIM Power Electronics program. The model focuses on the basic components in PV systems; The panel and the DC-DC converter. The modeling outcome data will be used as a reference verifying the performance of the tested modules during the year seasons under the dominating dusty hot weather in western Iraq.
Volume: 9
Issue: 4
Page: 1842-1850
Publish at: 2018-12-01

Study of Grid Connected Wind Energy System with Fuzzy Logic Based MPPT Controller

10.11591/ijra.v7i4.pp251-261
Jayalakshmi N. S , Sachin S
Renewable energy sources (RESs) are gaining more importance due to depleting fossil fuel sources in few decades. When compared to other RESs wind energy system is widely available and user friendly in nature. This paper presents modelling and simulation of grid connected PMSG based wind energy conversion system with P&O maximum power point tracking (MPPT) control technique.  The PQ controller is used for grid tied inverter to exchange real and reactive power with DC bus voltage regulation. The fuzzy logic controller (FLC) is used for MPPT implementation as it provides better performance as compared to the traditional PID controllers. The various case studies are considered for power management between wind system and the utility grid and the results are evaluated in MATLAB/ Simulink platform.
Volume: 7
Issue: 4
Page: 251-261
Publish at: 2018-12-01

Self-tuning Fuzzy Task Space Controller for Puma 560 Robot

10.11591/ijra.v7i4.pp273-282
Azita Azarfar
Since in most robot applications the desired paths are determined in task space or Cartesian space, it is important to control the robot arm in task space. In this paper a fuzzy controller with modifiable scaling factors is proposed to control the robot end-effector in task space. The controller is a fuzzy system with a mechanism to change the scaling factors when the error is bounded under a predetermined value. The controller is designed in joint space and is developed to work space by using inverse Jacobian strategy. The simulations results on Puma 560 robot manipulator illustrate the high performance of presented control method.
Volume: 7
Issue: 4
Page: 273-282
Publish at: 2018-12-01

Analytically Modeling, Design and Analysis a Nonlinear Controller for a STATCOM operations

10.11591/ijra.v7i4.pp221-231
J. K. Moharana
The concept of H Control is extended, in principle, to the SVPWM (Space Vector Pulse Width Modulation) based inverter switching of a STATCOM (STATic synchronous COMpensator) device. The SVPWM assures a greater value of modulation factor in the undermodulation as well as the overmodulation range compared to SPWM (Sine Pulse Width Modulation) i.e. a much higher fundamental content. In the present work, the STATCOM has been modeled and its model is nonlinear in  (phase angle between fundamental of system voltage and output voltage of STATCOM. The effect of increased modulation index and lower harmonic distortion has been studied through simulation w.r.t. different performance indices and dynamic response of relevant variables. A PI and an H Controller have been designed for closed-loop control of the system. It is found through simulation that H controller gives better response than PI controller for nonlinear system.
Volume: 7
Issue: 4
Page: 221-231
Publish at: 2018-12-01

Backstepping Control for MPPT and UPF of a Three Phase Single Stage Grid Connected PV System

10.11591/ijra.v7i4.pp262-272
M. El malah , A. Ba-razzouk , M. Guisser , E. Abdelmounim , M. Madark
This paper presents a new control methodology of a three phase grid connected photovoltaic system without using the intermediary DC/DC converter. Based on the synchronized nonlinear model of the whole photovoltaic system, two controllers have been proposed for the three-phase inverter in order to ensure the operation of the PV system at the maximum power point with unity power factor and minimum grid disturbance. Grid synchronization has been ensured by a three-phase 2nd order PLL (Phase-Locked Loop). The stability of each controller is demonstrated by means of Lyapunov analysis and evaluated under changing atmospheric conditions using the Matlab/Simulink environment, the simulation results clearly demonstrate the performance provided by each controller.
Volume: 7
Issue: 4
Page: 262-272
Publish at: 2018-12-01
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