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29,287 Article Results

Customized Hardware Crypto Engine for Wireless Sensor Networks

10.11591/ijeecs.v7.i1.pp263-275
Medhat Awadalla , Ahmed Al Maashri , Lavanya Pathuri , Afaq Ahmad
Nowadays, managing for optimal security to wireless sensor networks (WSNs) has emerged as an active research area. The challenging topics in this active research involve various issues such as energy consumption, routing algorithms, selection of sensors location according to a given premise, robustness, and efficiency. Despite the open problems in WSNs, already a high number of applications available shows the activeness of emerging research in this area. Through this paper, authors propose an alternative routing algorithmic approach that accelerate the existing algorithms in sense to develop a power-efficient crypto system to provide the desired level of security on a smaller footprint, while maintaining real-time performance and mapping them to customized hardware. To achieve this goal, the algorithms have been first analyzed and then profiled to recognize their computational structure that is to be mapped into hardware accelerators in platform of reconfigurable computing devices. An intensive set of experiments have been conducted and the obtained results show that the performance of the proposed architecture based on algorithms implementation outperforms the software implementation running on contemporary CPU in terms of the power consumption and throughput.
Volume: 7
Issue: 1
Page: 263-275
Publish at: 2017-07-01

Design and Simulation of a New ZVT Bi-directional DC-DC Converter for Electric Vehicles

10.11591/ijeecs.v7.i1.pp75-83
Rajesh Thumma , Veera Venkata Subrahmanya Kumar Bhajana , Pramo kumar Aylapogu
This paper presents a new zero voltage transistion (ZVT) bi-directional DC-DCconverter for energy storage system in DC traction. This bidirectional converter can transfers the power flow from low voltage side to high voltage side and viceversa. The conventional hard-switched non-isolated converter improved with the additional auxiliary cell to obtain zero voltage transition for the IGBTs. The main advantages of this topology are reduced the switching losses and improved the efficiency as well.The main aim of this converter is to achieve the operation of zero voltage transition during the commutation of main switches from off to on by utilizing auxiliary cell, which consist active and passive elements.The boost and buck modes of operations are achieved with the zero voltage transistion, which reduce the IGBTs current stresses and switching losses.This paper mainly describes the operation principles and the evaluation of the simulation results with the aid of Matlab simulations.The obtained results were proved the expected assumptions of the theoretical analysis.
Volume: 7
Issue: 1
Page: 75-83
Publish at: 2017-07-01

Distributed Optimal Relay Selection in Wireless Sensor Networks

10.11591/ijeecs.v7.i1.pp71-74
Karthik R , Nagaraju J , Mahendra Vucha
In wireless distributed sensor networks, one open problem is how to guarantee the reliable relay selection based on the quality of services diversity. To address this problem, we focus on the reliable adaptive relay selection approach and adaptive QoS supported algorithm, based on which we present a Markov chain model, in consideration of different packet states and error control algorithm assignment. The mathematical analyses and MATLAB simulation results show that the proposed relay selection approach could perform better in terms of saturation throughput, reliability, and energy efficiency, compared with the traditional approaches. More importantly, the quality of real-time multimedia streaming is improved significantly, in terms of decodable frame ratio and delay.
Volume: 7
Issue: 1
Page: 71-74
Publish at: 2017-07-01

An Empirical Performance Evaluation of Docker Container, Openstack Virtual Machine and Bare Metal Server

10.11591/ijeecs.v7.i1.pp205-213
Jyoti Shetty , Sahana Upadhaya , Rajarajeshwari H S , Shobha G , Jayant Chandra
Server virtualization is a fundamental technological innovation that is used extensively in IT enterprises. Server virtualization enables creation of multiple virtual machines on single underlying physical machine. It is realized either in form of hypervisors or containers. Hypervisor is an extra layer of abstraction between the hardware and virtual machines that emulates underlying hardware. In contrast, the more recent container-based virtualization technology runs on host kernel without additional layer of abstraction.Thus container technology is expected to provide near native performance compared to hypervisor based technology. We have conducted a series of experiments to measure and compare the performance of workloads over hypervisor based virtual machines, Docker containers and native bare metal machine. We use a standard benchmark workload suite that stress CPU, memory, disk IO and system. The results obtained show that Docker containers provide better or similar performance compared to traditional hypervisor based virtual machines in almost all the tests. However as expected the native system still provides the best performance as compared to either containers or hypervisors.
Volume: 7
Issue: 1
Page: 205-213
Publish at: 2017-07-01

A Miniaturized 878 MHz Slotted Meander Line Monopole Antenna

10.11591/ijeecs.v7.i1.pp170-177
Nabilah Ripin , Ahmad Asari Sulaiman , Nur Emileen Abd Rashid , Mohamad Fahmi Hussin , Nor Najwa Ismail
A slotted meander line printed monopole antenna for low frequency applications at 878 MHz is presented. The operating frequency of the conventional printed monopole antenna was greatly reduced by the presence of the slots and meander line which lead to the reduction of the antenna size. The size reduction up to 70% compared to the conventional reference antenna is achieved in this study. The antenna has a simple structure and small antenna size of 46.8 mm x 74 mm or 0.137𝝀0 x 0.217𝝀0. The antenna has been fabricated on the low-cost FR4 substrate and measured to validate the simulation performances. Measured results display that the proposed antenna produces omnidirectional radiation pattern of impedance bandwidth of 48.83 MHz and the maximum gain of -1.18 dBi.
Volume: 7
Issue: 1
Page: 170-177
Publish at: 2017-07-01

The Maximal SINR Selection Mode for 5G Millimeter-Wave MIMO: Model Systems and Analysis

10.11591/ijeecs.v7.i1.pp150-157
Dinh-Thuan Do , Duc-Anh Nguyen
In mmWave massive MIMO systems, the lens antenna array and beam selection by beamspace MIMO are employed to target the number of required RF chains reduced without obvious performance loss. For cost – effective, the number of RF chain is an allowable limitation, however, to obtain the near-optimal capacity efficiently, beam selection must require the exact information of the wide size of beamspace channel. Solution to this problem, in this paper we suggest analyzing whole beamspace based on maximal SINR. More specicfically, it is confirmed that the proposed beam selection algorithms achieve higher power efficiencies than a full system where all beams are employed.
Volume: 7
Issue: 1
Page: 150-157
Publish at: 2017-07-01

Towards Robust Non-Fragile Control in Wind Energy Engineering

10.11591/ijeecs.v7.i1.pp29-42
M. A. Ebrahim
Blade Pitch Controller (BPC) that can cope system uncertainties is one of the most interesting topics in wind energy engineering. Therefore, this paper presents a step towards the design of robust non-fragile BPC for wind energy conversion system. The proposed approach presents all boundaries of stability region that can guarantee robust stability (RS) over a wide range of operating conditions. The proposed technique results from the complementarity of both Root-Locus and Routh-Hurwitz (RL/RH) approach. Continuous variation in the operating conditions is tackled through a new hybrid control technique based on the referential integrity of both RL/RH and Kharitonov (Kh) theorem. Simulation results confirm the effectiveness of the proposed designing approach in computing the most resilient and robust controller.
Volume: 7
Issue: 1
Page: 29-42
Publish at: 2017-07-01

A Multi Output Formulation for Analog Circuits using MOM-SVM

10.11591/ijeecs.v7.i1.pp90-96
Shivalal Patro , Sushanta Kumar Mandal
This paper proposes performance based macro modeling of analog circuit using Multi Output Modeling (MOM) with the help of Support Vector Machine (SVM). SVM models the analog circuits and provides a relation between multi-input and multi-output parameters. In this work, Voltage Controlled Oscillator (VCO) is modeled as a test circuit which is designed in Cadence Virtuoso GPDK 45nm technology. From the Spice simulation results, the feasible dataset has been extracted from the complete dataset. Then, the VCO output frequency and phase noise is modeled by the width of the transistors which are the input parameters of the transistors. After tuning the model properly by k-cross validation method, the accuracy was found to be 96.1% which is good enough to make it use for the circuit synthesis purpose.
Volume: 7
Issue: 1
Page: 90-96
Publish at: 2017-07-01

Development of Photo Forensics Algorithm by Detecting Photoshop Manipulation using Error Level Analysis

10.11591/ijeecs.v7.i1.pp131-137
Teddy Surya Gunawan , Siti Amalina Mohammad Hanafiah , Mira Kartiwi , Nanang Ismail , Nor Farahidah Za'bah , Anis Nurashikin Nordin
Nowadays, image manipulation is common due to the availability of image processing software, such as Adobe Photoshop or GIMP. The original image captured by digital camera or smartphone normally is saved in the JPEG format due to its popularity. JPEG algorithm works on image grids, compressed independently, having size of 8x8 pixels. For unmodified image, all 8x8 grids should have a similar error level. For resaving operation, each block should degrade at approximately the same rate due to the introduction of similar amount of errors across the entire image. For modified image, the altered blocks should have higher error potential compred to the remaining part of the image. The objective of this paper is to develop a photo forensics algorithm which can detect any photo manipulation. The error level analysis (ELA) was further enhanced using vertical and horizontal histograms of ELA image to pinpoint the exact location of modification. Results showed that our proposed algorithm could identify successfully the modified image as well as showing the exact location of modifications.
Volume: 7
Issue: 1
Page: 131-137
Publish at: 2017-07-01

Estimation of Millimeter Wave Attenuation Due to Rain using 2D Video Distrometer Data in Malaysia

10.11591/ijeecs.v7.i1.pp164-169
Manhal Alhilali , Jafri Din , Michael Schönhuber , Hong Yin Lam
The increasing use of millimeter wave frequency bands requires a good understanding of the atmospheric channel. In equatorial regions, rain plays the central role in the impairment of millimeter wave propagation. Using large amounts of precise data collected by a two-dimensional video distrometer in Malaysia, the rain-specific attenuation of both vertically and horizontally polarized waves at the 38 GHz frequency was computed by applying the T-matrix technique. Good agreement is observed between these computations and fitted power law models from neighboring areas, but the ITU-R Recommendation P.838-3 significantly underestimates the rain-specific attenuation. The importance of including raindrop axial ratio in the calculation is revealed by differences among the local fitted coefficients for the vertically polarized estimations. The power law fit is provided, and the measurement is verified.
Volume: 7
Issue: 1
Page: 164-169
Publish at: 2017-07-01

Chemical by-Product Diagnostic Technique for Gas Insulated Switchgear Condition Monitoring

10.11591/ijeecs.v7.i1.pp18-28
Visa Musa Ibrahim , Zulkurnain Abdul-Malek , Nor Asiah Muhamad
Chemical by product diagnostic technique is an efficient, cost-effective and reliable diagnostic technique for gas insulate switchgear condition monitoring in view of its high sensitivity and anti- internal and external electromagnetic interference and noise. In this research paper, coaxial simulated gas insulated switchgear chamber and four different types of artificial defect were designed to cause partial discharge that will simulate the decomposition of sulphur hexafluoride gas in the chamber when energize. Fourier transform infrared spectrometer was used as the method of chemical by-product technique to detect the SF6 decomposition product and its concentration. Different numerous by-products were detected (SO2, SOF2, SO2F2, SO2F10, SiF4, CO, C3F8, C2F6 ) under this experiment using four different types of defect and the by-products differs with the type of defect and the generation rate. Gas insulated switchgear health condition can be feasibly diagnosed by analyzing the decomposition products of SF6 to identify its fault. 
Volume: 7
Issue: 1
Page: 18-28
Publish at: 2017-07-01

A Hybrid Feature Selection Based on Mutual Information and Genetic Algorithm

10.11591/ijeecs.v7.i1.pp214-225
Yuan-Dong Lan
Feature selection aims to choose an optimal subset of features that are necessary and sufficient to improve the generalization performance and the running efficiency of the learning algorithm. To get the optimal subset in the feature selection process, a hybrid feature selection based on mutual information and genetic algorithm is proposed in this paper. In order to make full use of the advantages of filter and wrapper model, the algorithm is divided into two phases: the filter phase and the wrapper phase. In the filter phase, this algorithm first uses the mutual information to sort the feature, and provides the heuristic information for the subsequent genetic algorithm, to accelerate the search process of the genetic algorithm. In the wrapper phase, using the genetic algorithm as the search strategy, considering the performance of the classifier and dimension of subset as an evaluation criterion, search the best subset of features. Experimental results on benchmark datasets show that the proposed algorithm has higher classification accuracy and smaller feature dimension, and its running time is less than the time of using genetic algorithm.
Volume: 7
Issue: 1
Page: 214-225
Publish at: 2017-07-01

Comparative Study of Fuzzy Logic Mobility Based FLM-AODV Routing Protocol and AODV in MANETs

10.11591/ijeecs.v7.i1.pp158-163
Vivek Sharma , Bashir Alam , M. N. Doja
In mobile ad hoc wireless networks (MANETs), traditional protocol like AODV performs well for low mobility of nodes but not for high node mobility. So, it becomes important to consider mobility factor during the path selection procedure of routing protocol. Here, a fuzzy logic mobility based protocol (FLM-AODV) that considers the mobility factor is proposed. Due to the consideration of mobility factor, the proposed protocol has better performance than the traditional AODV. The experiment results show that the proposed protocol has advantages of improved average end-to-end delay and packet delivery ratio (PDR) over existing AODV protocol.
Volume: 7
Issue: 1
Page: 158-163
Publish at: 2017-07-01

A Condorcet Voting Theory Based AHP Approach for MCDM Problems

10.11591/ijeecs.v7.i1.pp276-286
Sweta Bhattacharya , V Raju
Analytical Hierarchical Process has been used as a useful methodology for multi-criteria decision making environments with substantial applications in recent years. But the weakness of the traditional AHP method lies in the use of subjective judgement based assessment and standardized scale for pairwise comparison matrix creation. The paper proposes a Condorcet Voting Theory based AHP method to solve multi criteria decision making problems where Analytical Hierarchy Process (AHP) is combined with Condorcet theory based preferential voting technique followed by a quantitative ratio method for framing the comparison matrix instead of the standard importance scale in traditional AHP approach. The consistency ratio (CR) is calculated for both the approaches to determine and compare the consistency of both the methods. The results reveal Condorcet – AHP method to be superior generating lower consistency ratio and more accurate ranking of the criterion for solving MCDM problems.
Volume: 7
Issue: 1
Page: 276-286
Publish at: 2017-07-01

Prototype Design of Smart Home System using Internet of Things

10.11591/ijeecs.v7.i1.pp107-115
Teddy Surya Gunawan , Intan Rahmithul Husna Yaldi , Mira Kartiwi , Nanang Ismail , Nor Farahidah Za'bah , Hasmah Mansor , Anis Nurashikin Nordin
Smart home control system can be integrated into an existing home appliances to reduce the need for human intervention, increase security and energy efficiency. However, it is still an open problem due to difficulties such as network distance, signal interference, not user friendly, increased cost and power consumption. This paper reviews various topics on smart home technologies including control system, smart home network, smart home appliance and sensor technologies for smart home. In this research, the proposed prototype of home automation allows users to remotely switch on or off any household appliance based on Internet of Things (IoT) with the enhancement of solar charger. The smartphone and/or tablet replaces the manual use of personal computer without the need for high additional cost. This prototype uses four types of sensors i.e. PIR sensor, temperature sensor, ultrasonic sensor and smoke gas sensor for automatic environmental control and intrusion detection.
Volume: 7
Issue: 1
Page: 107-115
Publish at: 2017-07-01
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