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28,451 Article Results

Improving Performance of Mobile Ad Hoc Network Using Clustering Schemes

10.11591/ijict.v6i2.pp69-75
Mohamed Er-Rouidi , Houda Moudni , Hassan Faouzi , Hicham Mouncif , Abdelkrim Merbouha
Mobile ad hoc network become nowadays more and more used in different domains, due to its flexibility and low cost of deployment. However, this kind of network still suffering from several problems as the lack of resources. Many solutions are proposed to face these problems, among these solutions there is the clustering approach. This approach tries to partition the network into a virtual group. It is considered as a primordial solution that aims to enhance the performance of the total network, and makes it possible to guarantee basic levels of system performance. In this paper, we study some schemes of clustering such as Dominating-Set-based clustering, Energy-efficient clustering, Low-maintenance clustering, Load-balancing clustering, and Combined-metrics based clustering.
Volume: 6
Issue: 2
Page: 69-75
Publish at: 2017-08-01

Modeling of 6 to 4 Switched Reluctance Motor using Coefficient Method and Analytical Method

10.11591/ijeecs.v7.i2.pp373-380
Kasrul Abd Karim , N. Abdullah , M. Nazri Othman , Auzani Jidin , RN Firdaus
Electric kick scooter field has become famous this lately, and become another solution for electric vehicle. Switched Reluctance Motor has been choosen as the propulsion system in this application due to the advantages of this motor. Meanwhile, the issue of lack experience in electrical motor design is one of the hollow subjects in machine design field. Through design aspects, the Switched Reluctance motor is developed using a simple technique which is coefficients method. This method is to provide the easiest ways for other non-academic designer for those who has lack experience in motor design. A set of a coefficient to determine motor dimension is being set. Then, this technique will be refered to the existing analytical method to provide a design guideline and to validate this coefficient as the quick references to design the SRM. The aim is not to make a comparison between the methods but intend to provide another easiest solution to design the SRM motor. The modelling has been test using RMxprt tools The expectation from this method is the outcomes will be compatible with existing design.
Volume: 7
Issue: 2
Page: 373-380
Publish at: 2017-08-01

A Range Based Localization Error Minimization Technique for Wireless Sensor Network

10.11591/ijeecs.v7.i2.pp395-403
Sudha H. Thimmaiah , Mahadevan G
Wireless sensor network (WSN) is composed of low cost, tiny sensor that communicates with each other and transmit sensory data to its base station/sink. The sensor network has been adopted by various industries and organization for their ease of use and is considered to be the most sorted future paradigm. The sensor devices are remotely deployed and powered by batteries. Preserving the energy of sensor devices is most desired. To preserve the battery efficient routing technique is needed. Most routing technique required prior knowledge of sensor nodes location in order to provide energy efficiency. Many existing technique have been proposed in recent time to determine the position of sensor nodes. The existing technique proposed so for suffers in estimating the likelihood of localization error. Reducing the error in localization is most desired. This work present a (Time-of-Arrival) based localization technique and also present adaptive information estimation model to reduce/approximate the localization error in wireless sensor network. The author compares our proposed localization model with existing protocol and analyses its efficiency.
Volume: 7
Issue: 2
Page: 395-403
Publish at: 2017-08-01

A New Design of a Wideband Miniature Antenna Array

10.11591/ijece.v7i4.pp1850-1857
Oulhaj Otman , Naima A. Touhami , Mohamed Aghoutane , Abdelmounaim Belbachir Kchairi
In this work, we present a new configuration of a new miniature microstrip antenna array having a wide frequency band and with a circular polarization. The bandwidth is about 2GHz for a reflection coefficient under -10dB and centered on the ISM ‘Industrial Scientific Medical’ band at 5.8 GHz. To design such array, we have started the design by validating one antenna element at 10 GHz and after that by using the technique of defected ground, we have validated the antenna array in the frequency band [4 GHz -6 GHz] which will permit to miniature the dimensions. The final fabricated antenna array is mounted on an FR4 substrate, the whole area is 102.48 X 31.39 mm2  with a gain of 5dBi at 4GHz.
Volume: 7
Issue: 4
Page: 1850-1857
Publish at: 2017-08-01

Asymptotic Stability of Quaternion-based Attitude Control System with Saturation Function

10.11591/ijece.v7i4.pp1994-2001
Harry Septanto , Djoko Suprijanto
In the design of attitude control, rotational motion of the spacecraft is usually considered as a rotation of rigid body. Rotation matrix parameterization using quaternion can represent globally attitude of a rigid body rotational motions. However, the representation is not unique hence implies difficulties on the stability guarantee. This paper presents asymptotically stable analysis of a continuous scheme of quaternion-based control system that has saturation function. Simulations run show that the designed system applicable for a zero initial angular velocity case and a non-zero initial angular velocity case due to utilization of deadzone function as an element of the defined constraint in the stability analysis.
Volume: 7
Issue: 4
Page: 1994-2001
Publish at: 2017-08-01

A Review on Web Application Testing and its Current Research Directions

10.11591/ijece.v7i4.pp2132-2141
D. Rajya Lakshmi , S. Suguna Mallika
Testing is an important part of every software development process on which companies devote considerable time and effort. The burgeoning web applications and their proliferating economic significance in the society made the area of web application testing an area of acute importance. The web applications generally tend to take faster and quicker release cycles making their testing very challenging. The main issues in testing are cost efficiency and bug detection efficiency. Coverage-based   testing is the process of ensuring exercise of specific program elements. Coverage measurement helps determine the “thoroughness” of testing achieved. An avalanche of tools, techniques, frameworks came into existence to ascertain the quality of web applications.  A comparative study of some of the prominent tools, techniques and models for web application testing is presented. This work highlights the current research directions of some of the web application testing techniques.
Volume: 7
Issue: 4
Page: 2132-2141
Publish at: 2017-08-01

Active Distribution Grid Power Flow Analysis using Asymmetrical Hybrid Technique

10.11591/ijece.v7i4.pp1738-1748
Paramet Wirasanti , Egon Ortjohann
A conventional distribution power flow analysis has to be improved regards the changes in distribution network. One of the changes is a grid operation because a new grid concept, e.g. micro-grid and aggregation, is aimed to be operated based on area itself. Consequently, each area can be actively operated in either grid connected mode or islanding mode. Hence, this paper proposes an asymmetrical power flow analysis using hybrid technique to support this flexible mode change. The hybrid technique offers an opportunity to analyze power flow in a decoupling way. This means that the power flow analysis can be performed separately in each grid area. Regards the distributed generation, this paper also introduces a model based on inverter-based operation, i.e. grid forming, grid supporting and grid parallel. The proposed asymmetrical hybrid load flow method is examined in three case studies, i.e. a verification study with the DIgSILENT PowerFactory, a demonstration of decoupling analysis approach and a performance study with the Newton-Raphson method.
Volume: 7
Issue: 4
Page: 1738-1748
Publish at: 2017-08-01

A Novel Displacement-amplifying Compliant Mechanism Implemented on a Modified Capacitive Accelerometer

10.11591/ijece.v7i4.pp1858-1866
Ramon Cabello-Ruiz , Margarita Tecpoyotl-Torres , Alfonso Torres-Jacome , Volodymyr Grimalsky , Jose Gerardo Vera-Dimas , Pedro Vargas-Chable
The micro-accelerometers are devices used to measure acceleration. They are implemented in applications such as tilt-control in spacecraft, inertial navigation, oil exploration, etc. These applications require high operating frequency and displacement sensitivity. But getting both high parameter values at the same time is difficult, because there are physical relationships, for each one, where the mass is involved. When the mass is reduced, the operating frequency is high, but the displacement sensitivity decreases and vice versa. The implementation of Displacement-amplifying Compliant Mechanism (DaCM) supports to this dependence decreases. In this paper the displacement sensitivity and operation frequency of a Conventional Capacitive Accelerometer are shown (CCA). A Capacitive Accelerometer with Extended Beams (CAEB) is also presented, which improves displacement sensitivity compared with CCA, and finally the implementation of DACM´s in the aforementioned devices was also carried out. All analyzed cases were developed considering the in-plane mode. The Matlab code used to calculate displacement sensitivity and operating frequency relationship is given in Appendix A.
Volume: 7
Issue: 4
Page: 1858-1866
Publish at: 2017-08-01

Design of Compact Tri-Band Fractal Antenna for RFID Readers

10.11591/ijece.v7i4.pp2036-2044
Mohamed Ihamji , Elhassane Abdelmounim , Hamid Bennis , Mostafa Hefnawi , Mohamed Latrach
In this paper, a multiband and miniature rectangular microstrip antenna is designed and analyzed for Radio Frequency Identification (RFID) reader applications. The miniaturization is achieved using fractal technique and the physical parameters of the structure as well as its ground plane are optimized using CST Microwave Studio. The total area of the final structure is 71.6 x 94 mm2. The results show that the proposed antenna has good matching input impedance with a stable radiation pattern at 915 MHz, 2.45 GHz, and 5.8 GHz.
Volume: 7
Issue: 4
Page: 2036-2044
Publish at: 2017-08-01

Intelligent Hybrid Cloud Data Hosting Services with Effective Cost and High Availability

10.11591/ijece.v7i4.pp2176-2182
Madhu Bala Myneni , L V Narasimha Prasad , D Naveen Kumar
In this Paper the major concentration is an efficient and user based data hosting service for hybrid cloud. It provides friendly transaction scheme with the features of cost effective and high availability to all users. This framework intelligently puts data into cloud with effective cost and high availability. This gives a plan of proof of information respectability in which the client has utilize to check the rightness of his information. In this study the major cloud storage vendors in India are considered and the parameters like storage space, cost of storage, outgoing bandwidth and type of transition mode. Based on available knowledge on all parameters of existing cloud service providers in India, the intelligent hybrid cloud data hosting framework are assured to customers for low cost and high availability with mode of transition. It guarantees that the ability at the customer side is negligible and which will be helpful for customers.
Volume: 7
Issue: 4
Page: 2176-2182
Publish at: 2017-08-01

Virtual Laboratory for Line Follower Robot Competition

10.11591/ijece.v7i4.pp2253-2260
Suwasono Suwasono , Dwi Prihanto , Irawan Dwi Wahyono , Andrew Nafalski
Laboratory serves as an important facility for experiment and research activity. The limitation of time, equipment, and capacity in the experiment and research undertaking impede both students and college students in undertaking research for competition preparation, particularly dealing with line follower robot competition which requires a wide space of the room with various track types. Unsettled competition track influences PID control setting of line follower robot. This study aims at developing Virtual Laboratory (V-Lab) for students or college students who are preparing for line follower robot competition with unsettled and changeable tracks. This study concluded that the trial data score reached 98.5%, the material expert score obtained 89.7%, learning model expert score obtained 97.9%, and the average score of small group learning model and field of 82.4%, which the average score of the entire aspects obtained 90.8%.
Volume: 7
Issue: 4
Page: 2253-2260
Publish at: 2017-08-01

A Study of SVC’s Impact Simulation and Analysis for Distance Protection Relay on Transmission Lines

10.11591/ijece.v7i4.pp1686-1695
Ngo Minh Khoa , Nguyen Huu Hieu , Dinh Thanh Viet
This paper focuses on analyzing and evaluating impact of a Static Var Compensator (SVC) on the measured impedance at distance protection relay location on power transmission lines. The measured impedance at the relay location when a fault occurs on the line is determined by using voltage and current signals from voltage and current transformers at the relay and the type of fault occurred on the line. The MHO characteristic is applied to analyze impact of SVC on the distance protection relay. Based on the theory, the authors in this paper develop a simulation program on Matlab/Simulink software to analyze impact of SVC on the distance protection relay. In the power system model, it is supposed that the SVC is located at mid-point of the transmission line to study impact of SVC on the distance relay. The simulation results show that SVC will impact on the measured impedance at the relay when the fault occurs after the location of the SVC on the power transmission line.
Volume: 7
Issue: 4
Page: 1686-1695
Publish at: 2017-08-01

A New Induction Motor Adaptive Robust Vector Control based on Backstepping

10.11591/ijece.v7i4.pp1983-1993
Mhamed Madark , A. Ba-Razzouk , E. Abdelmounim , M.El Malah
In this paper, a novel approach to nonlinear control of induction machine, recursive on-line estimation of rotor time constant and load torque are developed. The proposed strategy combines Integrated Backstepping and Indirect Field Oriented Controls. The proposed approach is used to design controllers for the rotor flux and speed, estimate the values of rotor time constant and load torque and track their changes on-line. An open loop estimator is used to estimate the rotor flux. Simulation results are presented which demonstrate the effectiveness of the control technique and on-line estimation.
Volume: 7
Issue: 4
Page: 1983-1993
Publish at: 2017-08-01

Particle Swarm Optimization for the Path Loss Reduction in Suburban and Rural Area

10.11591/ijece.v7i4.pp2125-2131
Messaoud Garah , Houcine Oudira , Lotfi Djouane , Nazih Hamdiken
In the present work, a precise optimization method is proposed for tuning the parameters of the COST231 model to improve its accuracy in the path loss propagation prediction. The Particle Swarm Optimization is used to tune the model parameters. The predictions of the tuned model are compared with the most popular models. The performance criteria selected for the comparison of various empirical path loss models is the Root Mean Square Error (RMSE). The RMSE between the actual and predicted data are calculated for various path loss models. It turned out that the tuned COST 231 model outperforms the other studied models.
Volume: 7
Issue: 4
Page: 2125-2131
Publish at: 2017-08-01

Prioritizing Power demand response for Hydrogen PEMFC-Electric Vehicles using Hybrid Energy Storage

10.11591/ijece.v7i4.pp1789-1796
Jawadi Samir , Ben Slama Sami , Cherif Adnane
PEMFC powered Hybrid vehicle system is one of an interesting issue for the industry due to its high performances. The PEMFC cannot certainly ensure a sustained required energy in some scenarios. To solve this problem related to PEMFC transient response, a Hybrid Electrical Storage System (HES) is a potential candidate for a solution. The proposed Hybrid Storage system is comprised of the battery (BT) and a Super-Capacitor (SC) components. These components are included to control the hydrogen variations and the fast peak powers scenarios respectively. The SC is used to control PEMFC and the BT slow dynamics at the same times. An accurate Multi-Ways Energy Management System (MW-EMS) is proposed which aims to cooperate with the system components through SC/BT state of charge and a flux calculation. The simulation results are discussed and assessed using  MATLAB/ Simulink.
Volume: 7
Issue: 4
Page: 1789-1796
Publish at: 2017-08-01
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