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31,207 Article Results

Improved Time Training with Accuracy of Batch Back Propagation Algorithm Via Dynamic Learning Rate and Dynamic Momentum Factor

10.11591/ijai.v7.i4.pp170-178
Mohammed Sarhan Al_Duais , Fatma Susilawati. Mohamad
The man problem of batch back propagation (BBP) algorithm is slow training and there are several parameters needs to be adjusted manually, also suffers from saturation training.The learning rate and momentum factor are significant parameters for increasing the efficiency of the (BBP). In this study, we created a new dynamic function of each learning rate and momentum facor. We present the DBBPLM algorithm, which trains with a dynamic function for each the learning rate and momentum factor. A Sigmoid function used as activation function. The XOR problem, balance, breast cancer and iris dataset were used as benchmarks for testing the effects of the dynamic DBBPLM algorithm. All the experiments were performed on Matlab 2012 a. The stop training was determined ten power -5. From the experimental results, the DBBPLM algorithm provides superior performance in terms of training, and faster training with higher accuracy compared to the BBP algorithm and with existing works.
Volume: 7
Issue: 4
Page: 170-178
Publish at: 2018-12-01

Modeling and Simulation of 127 Level Optimal Multilevel Inverter with Lower Number of Switches and Minimum THD

10.11591/ijpeds.v9.i4.pp1765-1773
Bolla Madhusudana Reddy , Y. V. Siva Reddy , M. Vijaya Kumar
This paper proposes a new optimal high level multilevel inverter with minimum number of components. This multi level inverter (MLI) is designed with series combination of basic units which can generate positive levels at output. DC source values applied for each basic unit is different with another. An H bridge is connected across proposed MLI for generating negative levels along with positive levels at output and that inverter considered as proposed high level optimal multilevel inverter. Single unit is responsible producing 21 levels. Therefore six units are connected in cascaded form to increase number of levels as 127 at output. Decrease in the number of power switches, driver circuits, and dc voltage sources are the improvement of the proposed MLI. Sinusoidal multiple pulse width modulation (SPWM) technique is implemented to produce pulses for turning ON switches according requirement. Low total harmonic distortion at output voltage or current production is major advantage of proposed module. The validations of proposed MLI results are verified through MATLAB/SIMULINK.
Volume: 9
Issue: 4
Page: 1765-1773
Publish at: 2018-12-01

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

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

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

Parents’ Roles in Overcoming Elementary Students’ Learning Difficulties

10.11591/ijere.v7i4.15015
Ika Maryani , Noven Kusainun , Laila Fatmawati , Vera Yuli Erviana , Muhammad Nur Wangid , Ali Mustadi
This research aims to identify learning problems and the parents’roles in overcoming learning difficulties of 5th-grade students of Muhammadiyah Karangturi Elementary School, Bantul, Yogyakarta. Research participants were six students with learning difficulties, six parents, and four teachers. Selection of subjects used purposive sampling technique. Research object was the parents’ roles in overcoming students’ learning difficulties. This research was a qualitative research with data collection techniques in the form of observation, interviews, and documentation. Data analysis technique was the interactive model (data collection, data reduction, data models, and drawing conclusions). The results showed that the problems experienced by students with learning difficulties in Muhammadiyah Karangturi Elementary School were lower than average learning outcomes, slow understanding, and lack of reasonable attitudes, behavior, and emotional symptoms during the learning process. The parents’ roles in overcoming students’ learning difficulties are finding tutoring institutions for children, accompanying children when coming and going home from school, being good listeners, accompanying learning activities at home, taking children on the first day of school, meeting with teachers through parents association, and present at the distribution of learning outcomes report card.
Volume: 7
Issue: 4
Page: 305-312
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

The Examination of the 4th Graders’ Reading Comprehension Skills in Terms of the Sentiments Given in Reading Texts

10.11591/ijere.v7i4.13969
Esra Çetin , Sabri Sidekli
This study aims to investigate reading comprehension skills of the 4th graders in terms of the sentiments given in the reading text and to reveal that whether there is a meaningful difference for reading comprehension skills of different student groups or not.The sampling of the study has been selected randomly and it has been limited in primary schools in Muğla, Turkey. The sampling has been covered totally 387 4th graders, 209 of them have been female and 178 of them have been male students. The data collection instruments in the study have been determined as a personal information form and an achievement test on reading comprehension skills in terms of sentiments given in the reading texts. The answers of the students for the achievement test have been analyzed via percentage, frequency and arithmetic mean.According to the findings of the study; For the sentiments given in the reading texts, in line, the mostly understandable sentiments are happiness, fear and sadness. Additionally, there was a mean difference in terms of the level of reading comprehension skills. The students were mostly aware of texts containing happiness, and they understood sorrow in texts at least.
Volume: 7
Issue: 4
Page: 317-330
Publish at: 2018-12-01

3D Double Gate FinFET Construction of 30 nm Technology Node Impact Towards Short Channel Effect

10.11591/ijeecs.v12.i3.pp1358-1365
Ameer F. Roslan , F. Salehuddin , A.S. M.Zain , K.E. Kaharudin , H. Hazura , A.R Hanim , S. K Idris , B.Z. Zarina , Afifah Maheran A.H
This paper presents an investigation on properties of Double Gate FinFET (DGFinFET) and impact of physical properties of FinFET towards short channel effects (SCEs) for 30 nm device, where depletion-layer widths of the source-drain corresponds to the channel length aside from constant fin height (HFIN) and the fin thickness (TFIN). Virtual fabrication process of 3-dimensional (3D) design is applied throughout the study and its electrical characterization is employed and substantial is shown towards the FinFET design whereby in terms of the ratio of drive current against the leakage current (ION/IOFF ratio) at 563138.35 compared to prediction made by the International Technology Roadmap Semiconductor (ITRS) 2013. Conclusively, the incremental in ratio has fulfilled the desired in incremental on the drive current as well as reductions of the leakage current. Threshold voltage (VTH) meanwhile has also achieved the nominal requirement predicted by the International Technology Roadmap Semiconductor (ITRS) 2013 for which is at 0.676±12.7% V. The ION , IOFF and VTH obtained from the device has proved to meet the minimum requirement by ITRS 2013 for low performance Multi-Gate technology.
Volume: 12
Issue: 3
Page: 1358-1365
Publish at: 2018-12-01

Mediation Effect of Resilience on The Relationship Between Self-Efficacy and Competitiveness Among University Students

10.11591/ijere.v7i4.15725
Kingston K.F. Moke , Calvin K.W. Chang , Kususanto Prihadi , Chee Leong Goh
This study aims to evaluate the mediation role of resilience on the link between self-efficacy and competitiveness among university students in Malaysia. One hundred and thirty-six participants from several universities in Malaysia were recruited to respond to an online form consisted of the following scales: adapted versions of brief resilience scale from Smith et al, self-efficacy scale from Biemann, Kearney and Marggraf, and Personal Development Competitive Attitude Scale  from Ryckman, Hammer, Kaczor and Gold. Data was analyzed by using SPSS with PROCESS Macro and full mediation has been observed. Bias-corrected bootstrap confidence interval test indicated that the indirect effect of self-efficacy on competitiveness was significant and the Sobel test had confirmed the significance of the mediation. Further discussion, limitation and suggestion are discussed in the end of the paper.
Volume: 7
Issue: 4
Page: 279-284
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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