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31,456 Article Results

Examining Pre-school Teachers’ and Parents’ Views on Counseling and Guidance Services in Pre-school Education

10.11591/ijere.v6i3.7639
Gulsen Buyuksahin Cevik
Current study aims to reveal the problems that pre-school teachers and parents face, in relation to guidance and counseling services, at schools without psychological counselors. The purpose of including pre-school teachers and parents in the current study was to find out both whether they considered the guidance and counseling services a need and whether their methods of intervention against the problems that they face were functional. The current research was designed with interview technique as a qualitative study method. Research data were collected through a semi-structured interview form developed by the researcher. The researcher met the participants individually and asked the questions on the interview form for the current research. The responses that the participants provided were recorded and later transferred onto computer environment. The study group, formed based on voluntary participation, included total 30 participants with 15 pre-school teachers and 15 parents of pre-school children. Pre-school teacher participants 10 females and 5 males, worked for five different preschools in Adiyaman. Total 15 parents in the study group included nine females and six males. An examination of pre-school teachers’ responses based on the current study findings indicated that majority of the teachers did not prepare an annual counseling and guidance plan. Another finding of the current study was that children of most parents and teachers experience adjustment problems in pre-school. Another finding of the current research is about children’s individual problems. Main individual problems that parents experienced with their children included self-care and social development.
Volume: 6
Issue: 3
Page: 207-215
Publish at: 2017-09-01

Autonomous Vehicle Control System as a Mobile Robot by Artificial Neural Network

10.11591/ijra.v6i3.pp200-206
Nazmul Haque , Md Hasnat Riaz
In this paper we have presented the artificial neural network controlled car in mobile robotics and intelligent car systems. The motion control architecture of the robot is presented with an importance on the support and directing units. This uses neural network methods and the values fundamental its design is drawn. A robust neural control system using a model of the process is also developed.
Volume: 6
Issue: 3
Page: 200-206
Publish at: 2017-09-01

Discrete-time Inversion Model Control of a Double-damper System with Uncertain Parameters

10.11591/ijra.v6i3.pp168-177
Marwa Hannachi , Ikbel Bencheikh Ahmed , Dhaou Soudani
This paper addresses the control at discrete time of physical complex systems multi-inputs multi-outputs with variables parameters. Classified among the robust control laws the Internal Model Control (IMC) is adopted in this work to ensure the desired performances adjacent to the complexities of the system. However, the application of this control strategy requires that these different building blocks be open loop stable, which invites us, on the one hand, to apply the algebraic approach of Kharitinov for delimiting the summits stability domain’s system. On the other case, the Linear Matrix Inequalities (LMI) approach is applied to determine the corrector’s stability conditions obtained by a specific inversion of the chosen model. It is in this sense that we contribute by this work to execute the command by inversion the discrete-time model in order to ensure the stability and to maintain the performances the stability conditions of required for the double damper system with variable parameters.
Volume: 6
Issue: 3
Page: 168-177
Publish at: 2017-09-01

Controlling of Mobile Robot by Using of Predictive Controller

10.11591/ijra.v6i3.pp207-215
Alireza Rezaee
In this paper implementation of Model PredictiveController on mobile robot was explained. The conductedexperiments show effectiveness of the proposed method oncontrol of the mobile robot. Furthermore the effects of the modelparameters such as control horizon, prediction horizon,weighting factor and signal filter band on the controllerperformance were studied. Finally, a comparison between thedesigned MPC controller and PID and adaptive controllers waspresented demonstrating superior performance of the ModelPredictive Controllers.
Volume: 6
Issue: 3
Page: 207-215
Publish at: 2017-09-01

Zoo Simulator to Increase Children Learning Phase

10.11591/ijere.v6i3.8082
Rendy Rendy , Marcel Bonar Kristanda , Seng Hansun
The growth of kids' brain could be optimized by recognizing something. Learning to recognize animals is one of the methods to stimulate the children's brain growth to imagine. Nevertheless, kids tend to spend all their time by playing and could not focus to recognize the animals due to the way of learning which is usually not interactive and not interesting. Therefore, a game application was designed and developed to be used as a way to help children in recognizing the animals. This program was developed as a mobile game application with the animation and attractive display to increase the kids' interest to learn the animals. Beside that, Fisher-Yates shuffle algorithm has been successfully implemented on the game to randomize the images which can be found on puzzles, randomize the answers in image guessing puzzles, randomize animals to choose which can be sold, randomize the foods which will be given to the pets, and randomize the initial position to create patterns on rescue rare animal puzzles. After the implementation and testing on the game application, it proves that it could increase the kids’ interest in learning new animals to 4.18 in ARCS interest measuring index compare with textbook method which only 2.74.
Volume: 6
Issue: 3
Page: 198-206
Publish at: 2017-09-01

Multi-Operator Genetic Algorithm for Dynamic Optimization Problems

10.11591/ijai.v6.i3.pp139-142
Al-khafaji Amen
Maintaining population diversity is the most notable challenge in solving dynamic optimization problems (DOPs). Therefore, the objective of an efficient dynamic optimization algorithm is to track the optimum in these uncertain environments, and to locate the best solution. In this work, we propose a framework that is based on multi operators embedded in genetic algorithms (GA) and these operators are heuristic and arithmetic crossovers operators. The rationale behind this is to address the convergence problem and to maintain the diversity. The performance of the proposed framework is tested on the well-known dynamic optimization functions i.e., OneMax, Plateau, Royal Road and Deceptive. Empirical results show the superiority of the proposed algorithm when compared to state-of-the-art algorithms from the literature.
Volume: 6
Issue: 3
Page: 139-142
Publish at: 2017-09-01

An Improved Repetitive Control for Circulating Current Restraining in MMC-MTDC

10.12928/telkomnika.v15i3.5854
Yahui; Hunan University Wang , Yijia; Hunan University Cao , Yong; Hunan University Li , Chang; Hunan University Li
The modular multilevel converter (MMC) is widely used in many important application fields such as high voltage DC transmission system. And the multi-terminal architecture of it attracts many attentions. However, the circulating current of MMC is an inherent problem which is mainly caused by the voltage mismatch between arms and DC bus. In this paper, an advanced repetitive control method is proposed. This method is based on the even-harmonic characteristic of the circulating current and the potential feature of repetitive control that it has an internal integration part. The pole diagram of the closed loop transform function of the proposed control system proves the stability of the proposed method. And according to the simulation results of a three-terminal MMC-MTDC model in PSCAD/EMTDC, the improved repetitive control presents better circulation repression ability and superior anti-interference capability by comparing with traditional PI control method. Additionally, the simulation results also indicate that the proposed repetitive controller can restrain the fluctuation of SM voltage more effectively than PI control.
Volume: 15
Issue: 3
Page: 1048-1060
Publish at: 2017-09-01

The Addition Symptoms Parameter on Sentiment Analysis to Measure Public Health Concerns

10.12928/telkomnika.v15i3.4711
Yohanssen; Del Institute of Technology Pratama , Puspoko; Bandung Institute of Technology Ponco Ratno
Information about public health has a very important role not only for health practitioners, but also for goverment. The importance of health information can also affect the emotional changes that occur in the community, especially if there is news about the spread of infectious disease (epidemic) in particular area at the time, such as case of outbreaks Ebola disease or Mers in specific area. Based on data obtained from Semiocast, Indonesia is the country with fifth largest number of Twitter users in the world, where every topic that lively discussed will also influence a global trending topic. This paper will discuss the measurement of public health concern (Degree of Concern) level by using sentiment analysis classification on the twitter status. Sentiment data of the tweets were analyzed and given some value by using a scoring method. The scoring method equation (Kumar A. et al., 2012) will be tested with new additional parameters, ie symptoms parameters. The value of any twitter user sentiment is determined based on adjectives, verbs, and adverbs that contained in the sentence. The method that we used to find the semantic value of adjectives is corpus-based method. While for finding the semantic value of the verb and adverb we used a dictionary-based method.
Volume: 15
Issue: 3
Page: 1301-1309
Publish at: 2017-09-01

Profile of Single Mode Fiber Coupler Combining with Bragg Grating

10.12928/telkomnika.v15i3.6383
Romi Fadli; Dept. of Physics FMIPA Universitas Riau Syahputra , Saktioto; Dept. of Physics FMIPA Universitas Riau Saktioto , Ros; Dept. of Physics FMIPA Universitas Riau Meri , Syamsudhuha; Dept. of Math FMIPA Universitas Riau Syamsudhuha , Okfalisa; Department of Information Technique, FST, UIN SUSKA Okfalisa
This paper describes a numerical experiment of design and operation of a fiber coupler between single mode fiber and fiber Bragg grating (FBG). Both components are coupled depending with optical waveguide and source parameters. A characterization of fiber coupler is simulated by varying long grating of 10 mm to 60 mm using transfer matrix method based on coupled mode equation. The wave peak, transmission, and dispersion parameters are analyzed to determine the performance of the fiber coupler. The transmission spectrum showed the wave peaks rise to any increase in the grating length on channel 1 and channel 2. Transmission on channel 1 and channel 2 decreased from the wavelength range of 1.45μm–1.55μm and rised in the range of 1,55μm–1,65μm for each increment in length of grating. The dispersion showed the zero dispersion at specific wavelength for each increase in length of grating. This component can be applied for controlling information signal in wide range communication.
Volume: 15
Issue: 3
Page: 1103-1107
Publish at: 2017-09-01

HABCO: A Robust Agent on Hybrid Ant-Bee Colony Optimization

10.12928/telkomnika.v15i3.3656
Abba Suganda; Bina Nusantara University Girsang , Chun-Wei; National Ilan University Tsai , Chu-Sing; National Cheng Kung University Yang
The purpose of this research is to generate a robust agent by combining bee colony optimization (BCO) and ELU-Ants for solving traveling salesman problem (TSP), called HABCO. The robust agents, called ant-bees, firstly are grouped into three types scout, follower, recruiter at each stages. Then, the bad agents are high probably discarded, while the good agents are high probably duplicated in earlier steps. This first two steps mimic BCO algorithm. However, constructing tours such as choosing nodes, and updating pheromone are built by ELU-Ants method.To evaluate the performance of the proposed algorithm, HABCO is performed on several benchmark datasets and compared to ACS and BCO. The experimental results show that HABCO achieves the better solution, either with or without 2opt.
Volume: 15
Issue: 3
Page: 1247-1256
Publish at: 2017-09-01

The Pessimistic Investor Sentiments Indicator in Social Networks

10.12928/telkomnika.v15i3.5360
Rui; Harbin Institute of Technology Jin , Hong-Li; Harbin Institute of Technology Zhang , Xing; Harbin Institute of Technology Wang , Xiao-Meng; Harbin Institute of Technology Wang
With the worldwide proliferation of social networks, the social networks have played an important role in the social activities .Peoples are inclined to obtain the corresponding public opinion to make decision such as shopping, education, investment and so on. Analysis of data generated by social networks has become an important field of research, however in the field of public opinion analysis of social networks the quantitative measure indexes are still lacking. In this paper, the calculation method of pessimistic investor sentiments indicator is proposed, and the index has a certain theoretical and practical value.
Volume: 15
Issue: 3
Page: 1328-1334
Publish at: 2017-09-01

Miniaturization of Resonator based on Moore Fractal

10.12928/telkomnika.v15i3.7211
E.; Universiti Tun Hussein Onn Malaysia (UTHM) Mohd , S.; Universiti Tun Hussein Onn Malaysia (UTHM) H. Dahlan
This paper presents the simulation and fabrication of miniaturized half wavelength resonator design using Moore fractal iteration technique. These resonators have been prepared for wireless application at a centre frequency of 2.45GHz using a substrate with dielectric constant of 2.2. The size and performance are compared with the conventional half wavelength open line resonator. It can be shown that the Moore fractal iteration technique able to reduce 46% of the size of conventional half wavelength resonator through first iteration, and 30% through second iteration while maintaining the resonance performance. The resonators have been fabricated using conventional printed circuit board facilities not specialized in microwave devices. However, the unloaded Q-value of the Moore structure generally much lower compared the open line type.
Volume: 15
Issue: 3
Page: 1433–1439
Publish at: 2017-09-01

Integral Backstepping Approach for Mobile Robot Control

10.12928/telkomnika.v15i3.5667
Bouzgou; University of Sciences and Technology of Oran USTO/MB. Oran Kamel , Ibari; University of Sciences and Technology of Oran USTO/MB. Oran Benaoumeur , Benchikh; University of Evry Laredj , Ahmed-Foitih; University of Sciences and Technology of Oran USTO/MB. Oran Zoubir
This paper presents the trajectory tracking problem of a unicycle-type mobile robots. A robust output tracking controller for nonlinear systems in the presence of disturbances is proposed, the approach is based on the combination of integral action and Backstepping technique to compensate for the dynamic disturbances. For desired trajectory, the values of the linear and angular velocities of the robot are assured by the kinematic controller. The control law guarantees stability of the robot by using the lyapunov theorem. The simulation and experimental results are presented to verify the designed trajectory tracking control.
Volume: 15
Issue: 3
Page: 1173-1180
Publish at: 2017-09-01

The Performance of an Integrated Transformer in a DC/DC Converter

10.12928/telkomnika.v15i3.4251
Abdelhadi; USTO-MB University Namoune , Azzedine; USTO-MB University Hamid , Rachid; Hassiba Benbouali University Taleb
The separation between the low-voltage part and high-voltage part of the converter is formed by a transformer that transfers power while jamming the DC ring. The resonant mode power oscillator is utilized to allow elevated competence power transfer. The on-chip transformer is probable to have elevated value inductance, elevated quality factors and elevated coupling coefficient to decrease the loss in the oscillation. The performance of a transformer is extremely dependent on the structure, topology and other essential structures that create it compatible with the integrated circuits IC process such as patterned ground shield (PGS). Different types of transformers are modeled and simulated in MATLAB; the performances are compared to select the optimum design. The on-chip transformer model is simulated and the Results of MATLAB simulation are exposed, showing an excellent agreement in radio frequency RF.
Volume: 15
Issue: 3
Page: 1031-1039
Publish at: 2017-09-01

Fuzzy Logic Implementation with MATLAB for PV-Wind Hybrid System

10.12928/telkomnika.v15i3.6099
Alias; Universiti Teknikal Malaysia Melaka Khamis , Mohd Ruddin; Universiti Teknikal Malaysia Melaka Ab. Ghani , Chin Kim; Universiti Teknikal Malaysia Melaka Gan , Mohd Shahrieel; Universiti Teknikal Malaysia Melaka Mohd Aras , Muhamad Fiqry; Universiti Teknikal Malaysia Melaka Khamis , Tole; Universitas Ahmad Dahlan Sutikno , Jano; Universiti Teknikal Malaysia Melaka Zanariah
This paper is under in-depth investigation due to suspicion of possible plagiarism on a high similarity indexThe development of hybrid renewable energy sources is vital in power generation. This study focused on design of fuzzy logic control on hybrid PV/Wind system in order to improve the speed of DC motor. The fuzzy logic control based on battery management system has been designed for effective power utilization and improvement of the DC motor speed performance. In battery management system, a control was proposed to operate the charging and discharging mode of battery during non-linear power generation. While the battery would charge whenever the renewable energy power was greater than consumer load power, the battery would discharge whenever the renewable energy power was less than the consumer load power. DC motor speed control, included the simulation, implementation of fuzzy logic controller to DC motor and comparison between PID controller and Fuzzy Logic Controller. The proposed model was simulated using Matlab environment and the results was analyzed. Finally, simulation results were evaluated and validated to determine the effectiveness of the proposed controller.
Volume: 15
Issue: 3
Page: 1181-1191
Publish at: 2017-09-01
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