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30,033 Article Results

LED-Lamp Design for Renewable Energy-Based DC House Application

10.11591/ijpeds.v9.i3.pp987-996
Rini Nur Hasanah , Yosi Dwi Handari , Soeprapto Soeprapto , Taufik Taufik
This paper describes the design of an LED lamp to be used in a DC house being supplied using a renewable energy source or in a DC Smart Grid. LED lamps are widely known for its low-electricity consumption. The DC house application is becoming more and more popular due to its advantage of using DC generated electricity, for example from a solar photovoltaic system, directly without having to invert it into AC voltage. However, LED needs a driver to activate and control it. Its mounting also needs certain precaution to anticipate the high heat from the LED. An appropriate heatsink is required before activating the LED. The laboratory results indicate that a 3-watt LED bulb lamp can produce an efficiency up to 93.16% with luminous efficacy 82.29 lm/W. These results prove that an LED bulb consumes less energy and can give an optimal brightness.
Volume: 9
Issue: 3
Page: 987-996
Publish at: 2018-09-01

Dealing with Voters’ Privacy Preferences and Readiness in Electronic Voting

10.11591/ijeecs.v11.i3.pp994-1003
Muharman Lubis , Arif Ridho Lubis
Various countries have been encouraged to adopt electronic voting because it can reduce operational cost and time spent for tabulation process. In the current research, it has been mentioned several problem arised in term of technical aspects, voters’ trust, machine vulnerabilities and privacy right in which experts argued the election system have been compromised. In short term, the certain faction will try to exploit the system weaknesses for their own benefit, while in the long term, it can create public distrust to the government, which decrease the voters turn out, break the participation willingness and downgrade the quality of voting. Thus, the government should deal with previous issues in the election before adopting electronic approach while at the same time align with voters’ expectation to provide better election in serve citizen through comprehensive analysis. This study provide initial step to analyse the readiness of electronic voting from the social perspective in response to how Indonesia view the initiative to adopt new tech in voting system.
Volume: 11
Issue: 3
Page: 994-1003
Publish at: 2018-09-01

Investigation of The Effect of Pre-Service Classroom Teachers’ Critical Thinking Disposition on Their Media Literacy

10.11591/ijere.v7i3.13960
Özkan Çelik , Halil Çokçalişkan , Alper Yorulmaz
It is important to develop a critical perspective in terms of interpreting the messages to be given to the individuals through media and questioning the authenticity and content of these messages. It is therefore necessary to train the individuals called media literate who can critically perceive and evaluate the information conveyed through the media to increase the positive effects of the media and to reduce their negative effects as much as possible. The purpose of the current study is to investigate the effect of the pre-service teachers’ critical thinking disposition on their media literacy. The study employed the relational survey model, one of the quantitative research methods. In order to collect data, a personal information form, the Critical Thinking Disposition Scale, and the Media Literacy Level Determination Scale were used as the data collection tools. As a result of the study, the critical thinking disposition of the pre-service teachers was found to be medium and their media literacy was found to be high. The critical thinking disposition was found to be varying significantly depending on their gender and grade level; their media literacy was found to be varying depending on grade level but not on gender. There is a positive but low relationship between critical thinking disposition and media literacy and critical thinking is a significant predictor of media literacy.
Volume: 7
Issue: 3
Page: 194–202
Publish at: 2018-09-01

Hybrid-modulation-based control technique for reduction of output voltage ripples in frequency-modulated switch-mode power converters

10.11591/ijpeds.v9.i3.pp1272-1284
Deniss Stepins , Jin Huang , Janis Audze
In this paper a novel control technique for switching-frequency-modulated switch-mode power converters (SMPC) operating in discontinuous conduction mode is proposed. The use of the technique leads to significant reduction in peak-to-peak output voltage and peak currents increased due to straightforward application of switching frequency modulation (SFM). The technique is based on hybrid modulation scheme in which both switching frequency and duty ratio are modulated simultaneously by the same modulation signal. Theoretical analysis and experimental verification of the proposed technique are presented in details. Both computer simulations and experiments show that switching-frequency-modulated SMPC with the proposed control technique in comparison to SMPC without SFM has appreaciably lower conducted electromagnetic emissions, at the cost of slightly increased peak-to-peak output voltage and peak currents.
Volume: 9
Issue: 3
Page: 1272-1284
Publish at: 2018-09-01

Understanding Faculty Engagement in Assessment through Feedback and Dialogues: A Mixed Methods Approach

10.11591/ijere.v7i3.13346
Robert W. Elliott
The literature indicates faculty members' beliefs and attitudes toward assessment are crucial to the successful implementation of assessment.  However, few empirical studies have examined the culture of assessment among faculty members.  The intent of this single-level mixed methods case study is to identify the factors and examine how these factors influence faculty members' perceptions, attitudes, and their engagement in assessment activities by studying the case of a public teaching intensive university in the Southwest region of the U.S.  An online survey and asynchronous focus group interviews are used.  The implications for institutional policy making and professional development are discussed, based on the findings.
Volume: 7
Issue: 3
Page: 167-175
Publish at: 2018-09-01

A Grid-Connected Photovoltaic Interface System for Delivering Active and Reactive Powers

10.11591/ijpeds.v9.i3.pp1140-1146
Neilcy T Mooniarsih , Syafrudin Masri , Mohd Hafeez , Ayong Hiendro
This paper presents a grid-connected photovoltaic (PV) interface for delivering both active and reactive powers. The PV interface employs H-bridge topology DC-DC converter and inverter with analog control technology. The power flow is controlled solely by the adjustable DC output voltage of the DC to DC converter. In order to evaluate the PV interface system’s performances, it is tested by delivering power to the grid with low pawer factor. The experimental results show that at 300W active load, the inverter could deliver the reactive power of 400VAR. The PV interface could also produce very low harmonic voltage and current distorsions. The laboratory measurements show that the total harmonic distortions of inverter output voltage and current are 0.46% and 0.05%, respectively
Volume: 9
Issue: 3
Page: 1140-1146
Publish at: 2018-09-01

Practical Review and Evaluation on Parenting Education

10.11591/ijere.v7i3.14306
Jewish A. Merin
Parenting Education aims to reinforce families and increase parenting practices. This study intended to evaluate the efficiency of the delivery of the Parenting Education Program and its effectiveness in attaining its program objectives tailored to address specific needs, organized parent-child activities, and helping parents to access community services and supports. The valuation of this is to assess the impact of the program on the family and child. The study utilized Asset Based Community Development (ABCD), for sustainable community-driven development, and builds on the assets that are already found in the community and mobilizes individuals, associations, and institutions to come together to build on their assets- not concentrate on their needs. The results revealed that the parenting education have a great charge to deliver program which is useful and effective. These pointed out to the conclusion that the program is grounded in research and evaluated with empirical studies best achieve the roles as the extension service of the agency.
Volume: 7
Issue: 3
Page: 253-258
Publish at: 2018-09-01

Predictors of Educational Outcomes of Students with Multiple Disabilities: Results from a National Study

10.11591/ijere.v7i3.14019
Kymberly Bowlen , Kristen Osiniak , Tyler Syms , Karen H Larwin
Parents, siblings, and peers have an immeasurable effect on shaping children into who they become as individuals. Many factors, such as one’s relationships with these individuals, may have lasting effects on the educational and vocational outcomes of children who have multiple disabilities. The purpose of the present study is to investigate the relationships of children with multiple disabilities, as well as their perceptions regarding their educational experiences to determine the effects these factors may have on their future outcomes. The goal of the present study is to determine how potential correlations may influence children with multiple disabilities during transition and vocational programs, as well as their outcomes in life beyond formal schooling.
Volume: 7
Issue: 3
Page: 176-181
Publish at: 2018-09-01

Effect of Carrier Frequency in Grid Inter Connected Wind System With SSFC Controller

10.11591/ijpeds.v9.i3.pp1349-1355
Samanthaka Mani Kuchibhatla , D Padmavathi , R Srinivasa Rao
In this paper a grid interconnected system with wind energy source linked with   a FACTs based   SSFC device   ( Static switched filter compensator ) at load  for enhancing power quality is considered .Analysis is done  for the proposed system by varying Carrier frequency over  a wide range and observed system performance at all 3 busses wise  Grid bus, Generator Bus and Load Bus. Two regulators are used to organize the FACTS SSFC-device, these  are based on a tri-loop dynamic error obsessed inter-coupled input to VSC controller. Investigation is made in MATLAB/SIMULINK Environment for the proposed  system ,it is observed that system performance in terms of percentage Total harmonic Distortion is satisfactory along with the Enhanced Power Quality.
Volume: 9
Issue: 3
Page: 1349-1355
Publish at: 2018-09-01

The Influence of Powtoon-Assisted Group to Group Exchange and Powtoon-Assisted Talking Chips Learning Models in Primary Schools

10.11591/ijere.v7i3.14378
Achmad Buchori , Nyai Cintang
The element of creativity in learning mathematics in elementary school is lack of attention. Whereas, in solving the mathematic problem, creative thinking and ideas are needed in formulating and solving mathematical models of mathematic problems. Creative thoughts and ideas will emerge and develop if the process of learning mathematics in the classroom uses appropriate learning approach. The purpose of this study is to determine the influence of students' mathematical creative thinking ability on Powtoon-Assisted Group to Group Exchange and Talking Chips learning models to students' creative thinking ability. This research is a correlative quantitative research. The population was all the sixth grade students of Pedurungan Tengah 1 State Primary School in Semarang. The samples were class VI C (experiment 1), VI D (experiment 2), and VI B (control). The data were obtained from a post-test with open-ended answers. The analysis result of Anava test indicated that there was a difference on the mean of students' creative thinking ability in those three classes. Based on the Scheffe Test calculation, students' mathematical creative thinking ability with GGE model was better than the class with conventional learning model. Another result of Scheffe Test calculation indicated that students' mathematical creative thinking ability with Talking Chips model was better than the class with conventional learning. In addition, the Simple Linear Regression equation in both classes with GGE and Talking Chips models resulted in positive value equation. It could be concluded that Powtoon-Assisted Group to Group Exchange and Talking Chips learning models have a positive influence on students' creative thinking ability.
Volume: 7
Issue: 3
Page: 221-228
Publish at: 2018-09-01

Green Two-wheeled Mobility: Electric Scooters Using Brushless Motor based on Fuzzy Logic Controller

10.11591/ijra.v7i3.pp169-175
Hassane Bachiri , Abdelfetah Nasseri
In the last years electric vehicles gained importance as a more sustainable alternative to traditional vehicles. The introduction of an electric power train leads to lower air-pollution emissions. ‘Electric bicycles’ are sometimes more like an electric pedaled moped, other times more like a Vespa-looking scooter with or without pedals, and they often offer good range and speeds. However, a “scooter” can also be an electric cart for personal mobility, or a skateboard-like vehicle with small handlebars. Electric scooters are the most legislatively active realm of electric bicycles, at the present time. Brushless DC (BLDC) motors are one of the electrical drives that are rapidly gaining popularity, due to their high efficiency, good dynamic response and low maintenance. In this paper, the modeling and simulation of the BLDC motor was done using the software package MATLAB/SIMULINK. The proposed fuzzy logic controller has given optimal results compared to PI controller. The simulated system using the fuzzy controller has a fast response without overshoot, zero steady state error and high load robustness.
Volume: 7
Issue: 3
Page: 169-175
Publish at: 2018-09-01

A Radio Signal Strength Based Localization Error Optimization Technique for Wireless Sensor Network

10.11591/ijeecs.v11.i3.pp839-847
Sudha H. Thimmaiah , Mahadevan G
Wireless Sensor Networks (WSN) is useful in collecting data from various sensor devices that are distributed over a network which is generally positioned in a stationary manner. Wireless sensor based communication system is an ever growing sector in the industry of communication. Wireless infrastructure is a network that enables correspondence between various devices associated through an infrastructure protocol. Finding the position or location of sensor node (Localization) is an important factor in sensor network for proving efficient service to end user. The existing technique proposed so for adopt AOA (Angle of Arrival), TOA (Time of Arrival) etc… suffers in estimating the likelihood of localization error and induces high cost of deployment. To cater this in this work the author proposes a cost effective RSS (Received signal strength) based localization technique and also proposes an adaptive information estimation to reduce or approximate the localization error in wireless sensor network. The author compares our proposed localization model with existing protocol and analyse its efficiency.
Volume: 11
Issue: 3
Page: 839-847
Publish at: 2018-09-01

Design of “ 32 ” Point Split Radix b ased Multipath Delay Commutator FFT Architecture for Low Power Applications

10.11591/ijeecs.v11.i3.pp1042-1047
A. Manimaran , ABY K. Thomas
FFT is used in Modern high speed signal processing application. In aforementioned technologies that tends to operate in various operational modes. To implement FFT obviously it not only needs to meet high throughput demand and also it needed to scalable cater selectable N point FFT. Our contribution to this paper is two-fold of our existing method, as proposes for the split radix using Multipath Delay Commutator (MDC) algorithm has the least complex design and less multiplications comparing to radix-2 algorithm. So that it can able to reduce power consumption and area than our existing work. The implementation of power efficient hardware of split radix FFT (SRFFT) is built up by pruning excessive computation. Leveraging this potential, a new architecture of a configurable SRFFT processor is first developed so that unnecessary computations, which yield zeros at the output, are pruned. Simulations show that maximum power saving of around 20% is achieved. The proposed algorithm consists of mixed radix butterflies, whose structure is more regular. It has the conjugate-pair version, which requires less memory.
Volume: 11
Issue: 3
Page: 1042-1047
Publish at: 2018-09-01

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
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