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28,428 Article Results

Optimal Power and Modulation Adaptation Policies with Receiver Diversity over Rayleigh Fading Channel

10.11591/ijeecs.v4.i1.pp104-115
Muhammad Imran Tariq , Razvan Beuran , Yoichi Shinoda
Efficient bandwidth utilization is paramount in wireless communication systems, particulary in fadingenvironments, since fading is one of the major constraints that impair communication in wireless systems.The bandwidth efficiency of a wireless communication system can be enhanced significantly by employingpower and modulation adaptation policies with diversity combining gain. In this work, first we examine ananalytically-derived solution for Maximum Combining Ratio (MRC) diversity technique for the capacity perunit bandwidth. Then, we design an adaptive transmission system to utilize the diversity combining gain whileretaining the target BER by adapting power and constellation size using continuous power, channel inversionwith fixed rate and continuous power and disrecte-rate. By considering the effect of diversity combininggain, the designed system yields a reasonable spectral efficiency with respect to target BER that grows asthe number of diversity levels increase. Furthermore, the presented results show continuous power anddiscrete-rate adaptation policy reduces probability of outage unlike its achieved spectral efficiency is closeto other selected policies, which ratifies the optimized switching thresholds and makes it best candidate forimperfect channel conditions.
Volume: 4
Issue: 1
Page: 104-115
Publish at: 2016-10-01

The Development of Digital Library User Interface by Using Responsive Web Design and User Experience

10.11591/ijeecs.v4.i1.pp195-202
Dimas Sasongko , Ridi Ferdiana , Rudy Hartanto
The digital library has the purpose of providing services to the user, therefore, user experience factor and adjusting the display device diversity becomes the main thing to consider in building a digital library. The digital library is visited by many users because it provides a lot of information so that the existing content should be accessible anywhere, anytime and using a variety of devices. This research focuses on the design of digital library interface that adapts to the user experience and a variety of devices. The method used in this study is testing the user experience for the evaluation of digital library interface and Responsive Web Design for the development of digital library interface. The confidence interval is used as the analysis of the test data. Implementation of the user experience and Responsive Web Design in the digital library interface design proposals can improve the estimated percentage of success and task time users.
Volume: 4
Issue: 1
Page: 195-202
Publish at: 2016-10-01

Analysis and Comparison of SMAC and TMAC Protocol for Energy Efficient Dynamic Topology in Sensor Network

10.11591/ijece.v6i5.pp2331-2337
Tapaswini Samant , Amlan Datta
In the era of wireless communication, wireless sensor is one of the best technologies we are witnessing. In case of environmental monitoring, tactical systems and different tracking applications, wireless sensors are being used. Here, the corresponding nodes operate on incomplete power and thus the energy comes into play to operate these entire networks. Managing the energy and its utilization is vital for TCP/IP protocol suite which is MAC layer’s application. Thus keeping in mind the above challenges, the techniques used are increasing the sleep duration, over hearing and ideal listening, collision of packet and eliminating hidden terminal problem. This paper is oriented towards the comparison of energy consumption by SMAC and TMAC protocol. The characteristics of TMAC and SMAC protocols were explored keeping real transmission conditions intact, like variable transmission bit rate, dynamic topology and mobile sensors in network. TMAC and SMAC protocols are contention based protocols and are designed to keep the energy consumption low using duty cycle.
Volume: 6
Issue: 5
Page: 2331-2337
Publish at: 2016-10-01

Multicriteria Group Decision Making Using Fuzzy Approach for Evaluating Criteria of Electrician

10.11591/ijece.v6i5.pp2462-2469
Wiwien Hadikurniawati , Khabib Mustofa
This paper presents an approach of fuzzy multicriteria group decision making in determining alternatives to solve the selection problem of the electrician  through  a competency test.   Fuzzy approach is used to determine the highest priority of alternative electrician who has knowledge and ability that best fits the given parameters. Linguistic variables are presented by triangular fuzzy numbers. They are used to represent a subjective assessment of the decision-makers so that uncertainty and imprecision in the selection process can be minimized. Fuzzy approach require transforming crisp data to fuzzy numbers. Output of the best alternatives is generated by ranking method. Ranking has been made base on eight criteria which make the evaluation basis of each alternative. Ranking of the results is determined using different value of optimism index (). The fuzzy multi criteria decision making (FMCDM) calculation is using the best alternative using three value of optimism index. The result of calculation shows that the same alternative reached from different index of optimism. This alternative is the highest priority of decision making process.
Volume: 6
Issue: 5
Page: 2462-2469
Publish at: 2016-10-01

FOPID Controller Based AC Pump Supplied from PV Standalone Source Tuned using Fuzzy Logic Type 2

10.11591/ijeecs.v4.i1.pp10-19
Mohamed Mahmoud Ismail , Ahmed Fahmy Bendary
This paper presents 500 KW three phase standalone photovoltaic systems supplying pumping station consist of four pumps 80 KW rating. The system utilizes a two stage energy conversion power conditioning unit topology composed of a DC-DC boost converter and three level-three phase voltage source inverter (VSI). The Boost converter in this paper is designed to operate in continuous mode and controlled for maximum power point tracking (MPPT). In this paper, the performance of the pumps is improved by adapting the controller of MPPT using different techniques. The system is modeled and studied using MATLAB/Simulink.
Volume: 4
Issue: 1
Page: 10-19
Publish at: 2016-10-01

DPFC Performance with the Comparison of PI and ANN Controller

10.11591/ijece.v6i5.pp2080-2087
D Narasimha Rao , T Surendra , S Tara Kalyani
Modern power systems demand the active control of power flow and for this purpose Power flow controlling devices (PFCDs) are required. Distributed FACTS Controller (DPFC) is a part of FACTS family. DPFC offers equal control ability same as UPFC, comprising the adjustment of the internal angle of the machine and bus voltage includes line impedance. In addition to UPFC a new device evolved known as DPFC in which common DC link is eliminated that enables the exclusive working between the two converters which are shunt and the series. The Distributed-FACTS (D- FACTS) idea is adopt in the series converter scheme. The replacement of the high rating three phase series converter  with the multiple low rating single phase converters results in cost reduction and increases reliability greatly. The useful power transfer between the two converters which are shunt and series through common dc link in UPFC where as in DPFC in this the required power is transferred in the transmission line with three times of natural fundamental frequency. Where as in the new device no need of large voltage separation between the line and PFC Device is no requirement of high voltage isolation between because D-FACTS converters which are 1-ᴓ floating device with respect to the ground. Accordingly, In this paper we bring out the DPFC performance differences with different control techniques which are PI and Artificial Neural Network Controllers and bring with conclusion that ANN is a better control strategy compared to PI.
Volume: 6
Issue: 5
Page: 2080-2087
Publish at: 2016-10-01

Salt and Pepper Noise Removal Using Resizable Window and Gaussian Estimation Function

10.11591/ijece.v6i5.pp2219-2224
Suhad A. Ali , C. Elaf A. Abbood , Shaymaa Abdu lKadhm
Most types of the images are corrupted in many ways that because exposed to different types of noises. The corruptions happen during transmission from space to another, during storing or capturing. Image processing has various techniques to process the image. Before process the image, there is need to remove noise that corrupt the image and enhance it to be as near as to the original image. This paper proposed a new method to process a particular common type of noise. This method removes salt and pepper noise by using many techniques. First, detect the noisy pixel, then increasing the size of the pixel window depending on some criteria to be enough to estimate the results. To estimates the pixels of image, the Gaussian estimation function is used. The resulted image quality is measured by the statistical quantity measures that's Peak Signal-to-Noise Ratio (PSNR) and The Structural Similarity (SSIM) metrics. The results illustrate the quality of the enhanced image compared with the other traditional techniques. The slight gradual of SSIM metric described the performance of the proposed method with high increasing of noise levels.
Volume: 6
Issue: 5
Page: 2219-2224
Publish at: 2016-10-01

Circuit Models of Lossy Multic onductor Transmission Lines: Incident Plane Wave Effect

10.11591/ijece.v6i5.pp2369-2378
Saih Mohamed , Rouijaa Hicham , Ghammaz Abdelilah
In this paper, we concentrate on the variety impacts of incident plane wave on multiconductor transmission lines, utilizing Branin’s method, which is alluded to as the method of characteristics. The model can be directly used for the time-domain and frequency-domain analyses, Moreover,  it had the advantage of being used without the need of setting the  preconditions of  the  charges  applied  to  its  ends; this permits it to be effortlessly embedded in circuit simulators, for example Spice, Saber, and Esacap. This model validity is affirmed by contrasting our simulation results under ESACAP and different results, and we will talk about variety impacts of incident plane wave.
Volume: 6
Issue: 5
Page: 2369-2378
Publish at: 2016-10-01

Robustness Study of Fractional Order PID Controller Optimized by Particle Swarm Optimization in AVR System

10.11591/ijece.v6i5.pp2033-2040
N. Ramesh Raju , P. Linga Reddy
In this paper a novel design method for determining fractional order PID (PIλDµ) controller parameters of an AVR system using particle swarm optimization algorithm is presented. This paper presents how to employ the particle swarm optimization to seek efficiently the optimal parameters of PIλDµ controller. The robustness study is made for this controller against parameter variation of AVR system. This work has been simulated in MATLAB environment with FOMCON (Fractional Order Modeling and Control) tool box.The proposed PSOPIλDµ controller has superior performance and robust compared to GA tuned PIλDµ controller. The results are also compared with PSO tuned PID controller.
Volume: 6
Issue: 5
Page: 2033-2040
Publish at: 2016-10-01

Sign Language Recognition System Simulated for Video Captured with Smart Phone Front Camera

10.11591/ijece.v6i5.pp2176-2187
G. Ananth Rao , P.V.V. Kishore
This works objective is to bring sign language closer to real time implementation on mobile platforms. A video database of Indian sign language is created with a mobile front camera in selfie mode. This video is processed on a personal computer by constraining the computing power to that of a smart phone with 2GB ram. Pre-filtering, segmentation and feature extraction on video frames creates a sign language feature space. Minimum distance classification of the sign feature space converts signs to text or speech. ASUS smart phone with 5M pixel front camera captures continuous sign videos containing around 240 frames at a frame rate of 30fps. Sobel edge operator’s power is enhanced with morphology and adaptive thresholding giving a near perfect segmentation of hand and head portions. Word matching score (WMS) estimates performance of the proposed method with an average WMS of around 90.58%.
Volume: 6
Issue: 5
Page: 2176-2187
Publish at: 2016-10-01

An Approach of Semantic Similarity Measure between Documents Based on Big Data

10.11591/ijece.v6i5.pp2454-2461
Mohammed Erritali , Abderrahim Beni-Hssane , Marouane Birjali , Youness Madani
Semantic indexing and document similarity is an important information retrieval system problem in Big Data with broad applications. In this paper, we investigate MapReduce programming model as a specific framework for managing distributed processing in a large of amount documents. Then we study the state of the art of different approaches for computing the similarity of documents. Finally, we propose our approach of semantic similarity measures using WordNet as an external network semantic resource. For evaluation, we compare the proposed approach with other approaches previously presented by using our new MapReduce algorithm. Experimental results review that our proposed approach outperforms the state of the art ones on running time performance and increases the measurement of semantic similarity.
Volume: 6
Issue: 5
Page: 2454-2461
Publish at: 2016-10-01

Simulation and Implementation of Multiple Unipolar Stepper Motor Position Control in the Three Stepping Modes using Microcontroller

10.11591/ijeecs.v4.i1.pp29-40
Ayman Y. Yousef , M. H. Mostafa
This paper presents a multiple unipolar stepper motor position control system using microcontroller (MCU) in anticlockwise and clockwise directions. The open loop controller of the implemented position control system for the three stepping modes of operation has been designed and developed with three stepper motors and without position feedback. The MCU is programmed using flowcode software package to generate the pulse signals with the desired stepping sequences and step angles. These pulse signals are necessary to drive the three stepper motors in the three drive modes (wave-step, full-step, and Half-step) according to the control algorithm. Three devices of 8 Channel Darlington Driver (chip ULN2803) are used to drive the three stepper motors and provide them with the sufficient current. The position control system has been simulated using proteus design suite software package and the controller has been implemented using low cost PIC16F877A (MCU). A reliable and accurate position control of the stepper motor is achieved by this position control system. 
Volume: 4
Issue: 1
Page: 29-40
Publish at: 2016-10-01

A Non-Linear Controller for Forecasting the Rising Demand for Electric Vehicles Applicable to Indian Road Conditions

10.11591/ijece.v6i5.pp2274-2281
Poorani S , Murugan R
These days load forecasting is much more required  in order to reduce the wastage of energy. This paper is to implement & develop the idea of short term load forecasting by using Artificial Neural Network, the design of the neural network model, input data selection and Training & Testing by using short term load forecasting will be described in paper. For the EV load forecasting only 2 variables are being used as temperature and humidity to forecast the output as load. This type of designed ANN model will be mapped by using historical data of temperature and humidity (taken from meteorological sites), whereas it is being Trained & Tested by using historical data of loading of EV charging stations (Chetan maini ,Bangalore) of a particular area as Coimbatore to give the desired result. Training & Testing done by using large amount of historical data of weather conditions and loading data (kV). By the help of this model they can predict their daily loads (next day's load) by putting historical data in the acquired algorithm.
Volume: 6
Issue: 5
Page: 2274-2281
Publish at: 2016-10-01

An Effiecient Approach for Resource Auto-Scaling in Cloud Environments

10.11591/ijece.v6i5.pp2415-2424
Bahar Asgari , Mostafa Ghobaei Arani , Sam Jabbehdari
Cloud services have become more popular among users these days. Automatic resource provisioning for cloud services is one of the important challenges in cloud environments. In the cloud computing environment, resource providers shall offer required resources to users automatically without any limitations. It means whenever a user needs more resources, the required resources should be dedicated to the users without any problems. On the other hand, if resources are more than user’s needs extra resources should be turn off temporarily and turn back on whenever they needed. In this paper, we propose an automatic resource provisioning approach based on reinforcement learning for auto-scaling resources according to Markov Decision Process (MDP). Simulation Results show that the rate of Service Level Agreement (SLA) violation and stability that the proposed approach better performance compared to the similar approaches.
Volume: 6
Issue: 5
Page: 2415-2424
Publish at: 2016-10-01

Structural Analysis and Five-Layered Control Frame Work for Underground Pipe Inspection Robot

10.11591/ijra.v5i4.pp221-229
Satheesh Kumar Gopal , Ajin M
Design of a robot generally involves various types of analyses that invariably include structural, numerical, kinematic, dynamic and experimental analysis. A robot designed as a solution for social problems would have to undergo all these stages before it is incorporated in-situ. The authors in continuation to their earlier work [1] are presenting the results of structural analysis in this paper. Initially a detailed description of the anatomy of the proposed robot is provided for clarity along with the identified design parameters. The primary design parameter ‘load to power ratio’ establishes certain geometric and structural constrains on the design of links comprising the robot. This relationship is studied in order to improve to the load to power ratio of the robot. A significant reduction in weight is achieved by working on these variables which leads to the improvement in the functional aspects too, viz., reduced torque requirement from the motor. Upon finalizing on the choice of motors and sensors the 5 layered control architecture based on statespace representation is also presented. Fuzzy logic based control algorithm is proposed to unite the layered approach depending on the task allocated to the robot.
Volume: 5
Issue: 4
Page: 221-229
Publish at: 2016-09-19
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