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29,734 Article Results

Detection and Separation of Eeg Artifacts Using Wavelet Transform

10.11591/ijict.v7i3.pp149-156
R. Suresh Kumar , P. Manimegalai
Bio-medical signal processing is one of the most important techniques of multichannel sensor network and it has a substantial concentration in medical application. However, the real-time and recorded signals in multisensory instruments contains different and huge amount of noise, and great work has been completed in developing most favorable structures for estimating the signal source from the noisy signal in multichannel observations. Methods have been developed to obtain the optimal linear estimation of the output signal through the Wide-Sense-Stationary (WSS) process with the help of time-invariant filters. In this process, the input signal and the noise signal are assumed to achieve the linear output signal. During the process, the non-stationary signals arise in the bio-medical signal processing in addition to it there is no effective structure to deal with them. Wavelets transform has been proved to be the efficient tool for handling the non-stationary signals, but wavelet provide any possible way to approach multichannel signal processing. Based on the basic structure of linear estimation of non-stationary multichannel data and statistical models of spatial signal coherence acquire through the wavelet transform in multichannel estimation. The above methods can be used for Electroencephalography (EEG) signal denoising through the original signal and then implement the noise reduction technique to evaluate their performance such as SNR, MSE and computation time.
Volume: 7
Issue: 3
Page: 149-156
Publish at: 2018-12-01

Preserving Authenticity and Integrity of Distributed Networks through Novel Message Authentication Code

10.11591/ijeecs.v12.i3.pp1297-1304
Gurpreet K. Sodhi , Gurjot S. Gaba , Lavish Kansal , Eduard Babulak , Mohammed AlZain , Sandeep Kumar Arora , Mehedi Masud
In this era of universal electronic connectivity, communication is no more confined to transfer of data from one end to the other; rather it aims at secure data transfer. Communication sector has developed beyond this traditional boundary of data transfer and is now working on ways to provide data from the intended senders to the intended receivers in an unaltered form. Considering all these conditions, the data transfer needs to follow the principles of authentication, confidentiality and integrity. The former two have been addressed using digital signatures and encryption schemes respectively, while the solution to the later is the use of Message Authentication Code. This paper presents a Message Authentication Code scheme, which uses the biological characteristics represented by Deoxyribonucleic acid combined with the output of Blum Blum Shub Random Number Generator, as a secret key along with a novel hash algorithm. This Message Authentication Code structure is evaluated on the basis of National Institute of Science and Technology test suite for random numbers, avalanche criteria and network attacks. The results reveal that the proposed scheme performs well under all the criteria and thus is capable of preserving integrity; this increases its applicability in any data sensitive environment.
Volume: 12
Issue: 3
Page: 1297-1304
Publish at: 2018-12-01

Sensorless Control of a Fault-Tolerant Multi-Level PMSM Drive

10.12928/telkomnika.v16i6.9647
Kamel; An-Najah National Univeristy Saleh , Mark; Nottingham University Sumner
This paper presents a new technique to track the saliency position in a permanent magnet synchronous motor (PMSM) post a single phase open-circuit fault. The PMSM is driven by a fault-tolerant multi-level inverter that is utilized to implement a fault-tolerant control strategy to minimize system performance degradation post the fault.The fault-tolerant multi-level inverter is consisting of a number of insulated-gate bipolar transistors (IGBTs). The dynamic current reponses of the PMSM motor due to the switching actions of these IGBTs are used extract the saliency position. This process is not introducing any modification to the operation of the fault-tolerant multil-level inverter as it uses only the fundamental pulse width modulation (PWM) waveform. Moreover,it considers the modifications introduced to the PMSM motor and the multi-level inverter post the fault.Simulation results are provided to verify the effectiveness of the proposed strategy of saliency tracking of a PMSM motor driven by a fault-tolerant four-leg multi-level inverter over a wide range of speeds in the case of a single-phase open circuit fault.
Volume: 16
Issue: 6
Page: 2930-2942
Publish at: 2018-12-01

Empowering E-governance with E-voting

10.11591/ijeecs.v12.i3.pp1081-1086
Amarjeet Singh , Ramakanth Kumar P , Nagaraj G Cholli
Advances in Information and Communications Technology (ICT) have impacted the society in many ways. Be it education, healthcare, media or governance, the transformation is visible. As individual entities like education or healthcare systems have already implemented ICT to certain extent, e-governance is yet to make a significant progress even though several initiatives are undertaken. E-governance means activities like voting, administration, financial transaction etc., are enabled using automation systems.  This paper discusses one part of the e-governance; e-voting. As e-voting empowers government, there are lot of challenges in implementing the e-voting system considering security threats and confidentiality involved in it. Online voting (e-voting) needs to be deployed as more convenient, relatively secure and less resource consuming system.   E-voting system should ensure convenience for people to be able to access the system from personal or public computer with security and confidentiality. The presence of e-voting system with all the necessary security measures and convenience can be a potential solution for low voter turnout at the polls.  The presented work demonstrates an online e-voting prototype system called SecureV. The proposed model achieves specific tasks namely, maintaining the anonymity of the voter, encryption of the vote, integrity check and avoids second time voting.
Volume: 12
Issue: 3
Page: 1081-1086
Publish at: 2018-12-01

Proposed P-shaped Microstrip Antenna Array for Wireless Communication Applications

10.12928/telkomnika.v16i6.10494
Raad H.; Al-Mustansirayh university Thaher , Noor Baqir; Al-Mustansirayh University Hassan
In this paper a P-shaped microstrip antenna array is proposed for X-band applications in the frequency range (8.1567-9.3811) GHz .The gain obtained in this frequency range is about 8.305 dBi. The reflection coefficient is less than - 10 dB in the above frequency range. The simulation results were obtained for the optimum parameters using the CST software while the practical test was carried out using Vector Network Analyzer (VNA). The microstrip antenna was manufactured using FR-4 substrate with relative dielectric constant of 4.3 and loss tangent tan⁡〖δ=0.002〗.The simulation and practical results were compared. The size of the antenna array is (33×70×1.6) 〖mm〗^3. This array is suitable for satellite communication, radar application.
Volume: 16
Issue: 6
Page: 2597-2607
Publish at: 2018-12-01

High Gain Power Generation Based On Hybrid Renewable Energy for AC Load Application

10.11591/ijeecs.v12.i3.pp1195-1202
Shaik Mohammad Irshad , G.P Ramesh
This study presents the distributed energy source based current fed inverter has generated high voltage with less passive elements. The hybrid renewable energy generation such as solar and wind has used. The single stage power generation based switched inverter has combined characteristics of both impedance source inverter and switched boost inverter. In conventional voltage source inverter has less boost ability and high electromagnetic noise immunity to the modified current fed inverter circuit. The single diode photovoltaic model and wind-based energy generation have fed into current fed switched inverter for improving high gain and high power factor. The maximum power point tracking such as incremental conductance algorithm has fast-tracking of solar power and generates continuous power to the inverter circuit. 12V solar power and wind power is designed for dc power production, and the output of dc link capacitor is 118V using current fed switched inverter. The current fed switched inverter is designed and implemented in MATLAB/Simulink environment.
Volume: 12
Issue: 3
Page: 1195-1202
Publish at: 2018-12-01

Transient Stability Improvement of the Power Systems

10.11591/ijeecs.v12.i3.pp916-923
Zaid H. Al-Tameemi , Hayder H. Enawi , Karrar M. Al-Anbary , Hussam M. Almukhtar
During the last few decades, electrical power demand enlarged significantly whereas power production and transmission expansions has been brutally restricted as a result of restricted resources as well as ecological constrains. Consequently, many transmission lines have been profoundly loading so the stability of power system became as Limiting factor for transferring electrical power. So, maintaining a secure and stable operation of the electric power networks is deemed an imporatant and challenge issue.transient stability of a power system has been gained a considerable attention from researchers dute to it importance . Therefore,this paper sheds light on A substantial number of the adopted techniques, including an inclease in  inertia constant of generator, shunt capacitor, reduction reactance of the transmission line to acheive this purpose. A 7-Machine CIGRE system has been considered a case study. Matlab package has been employed to implement this study. The simulation results show that the transient stability of the repective system enhanced considerably with these techniques.
Volume: 12
Issue: 3
Page: 916-923
Publish at: 2018-12-01

A Computational Analysis of ECC Based Novel Authentication Scheme in VANET

10.11591/ijece.v8i6.pp5268-5277
Sachin P. Godse , Parikshit N. Mahalle
A recent development in the adhoc network is a vehicular network called VANET (Vehicular Adhoc Network). Intelligent Transportation System is the Intelligent application of VANET. Due to open nature of VANET attacker can launch various kind of attack. As VANET messages are deal with very crucial information’s which may save the life of passengers by avoiding accidents, save the time of people on a trip, exchange of secret information etc., because of this security is must be in the VANET. To ensure the highest level of security the network should be free from attackers, there by all information pass among nodes in the network must be reliable i.e. should be originated by an authenticated node. Authentication is the first line of security in VANET; it avoids nonregistered vehicle in the network. Previous research come up with some Cryptographic, Trust based, Id based, Group signature based authentication schemes. A speed of authentication and privacy preservation is important parameters in VANET authentication. This paper addresses the computational analysis of authentication schemes based on ECC. We started analysis from comparing plain ECC with our proposed AECC (Adaptive Elliptic Curve Cryptography) and EECC (Enhanced Elliptic Curve Cryptography). The result of analysis shows proposed schemes improve speed and security of authentication. In AECC key size is adaptive i.e. different sizes of keys are generated during key generation phase. Three ranges are specified for key sizes small, large and medium. In EECC we added an extra parameter during transmission of information from the vehicle to RSU for key generation. Schemes of authentications are evaluated by comparative analysis of time required for authentication and key breaking possibilities of keys used in authentication.
Volume: 8
Issue: 6
Page: 5268-5277
Publish at: 2018-12-01

A Review of Energy-aware Cloud Computing Surveys

10.12928/telkomnika.v16i6.9938
Azlan; Universiti Teknologi MARA Ismail , Nor Adzlan; Universiti Teknologi MARA Jamaludin , Suzana; Universiti Teknologi MARA Zambri
The increasing demands on the usage of data centers especially in provisioning cloud applications (i.e. data-intensive applications) have drastically increased the energy consumption and becoming a critical issue. Failing to handle the increasing in energy consumption leads to the negative impact on the environment, and also negatively affecting the cloud providers’ profits due to increasing costs. Various surveys have been carried out to address and classify energy-aware approaches and solutions. As an active research area with increasing number of proposals, more surveys are needed to support researchers in the research area. Thus, in this paper, we intend to provide the current state of existing related surveys that serve as a guideline for the researchers as well as the potential reviewers to embark into a new concern and dimension to compliment existing related surveys. Our review highlights four main topics and concludes to some recommendations for the future survey.
Volume: 16
Issue: 6
Page: 2740-2746
Publish at: 2018-12-01

Application of EMG and Force Signals of Elbow Joint on Robot-assisted Arm Training

10.12928/telkomnika.v16i6.11707
Riky Tri; Universitas Airlangga Yunardi , Eva Inaiyah; Universitas Airlangga Agustin , Risalatul; Universitas Airlangga Latifah , Winarno; Universitas Airlangga Winarno
Flexion-extension based on the system's robotic arm has the potential to increase the patient's elbow joint movement. The force sensor and electromyography signals can support the biomechanical system to detect electrical signals generated by the muscles of the biological. The purpose of this study is to implement the design of force sensor and EMG signals application on the elbow flexion motion of the upper arm. In this experiments, the movements of flexion at an angle of 45º, 90º and 135º is applied to identify the relationship between the amplitude of the EMG and force signals on every angle. The contribution of this research is for supporting the development of the Robot-Assisted Arm Training. The correlation between the force signal and the EMG signal from the subject studied in the elbow joint motion tests. The application of sensors tested by an experimental on healthy subjects to simulating arm movement. The experimental results show the relationship between the amplitude of the EMG and force signals on flexion angle of the joint mechanism for monitoring the angular displacement of the robotic arm. Further developments in the design of force sensor and EMG signals are potentially for open the way for the next researches based on the physiological condition of each patient.
Volume: 16
Issue: 6
Page: 2913-2920
Publish at: 2018-12-01

Repair and Replacement Strategy for Optimizing Cost and Time of Warranty Process using Integer Programming

10.12928/telkomnika.v16i6.10407
Ardy; Institut Teknologi Sepuluh Nopember Januantoro , Riyanarto; Institut Teknologi Sepuluh Nopember Sarno
Warranty is an assurance issued by a company as the manufacturer to guarantee that its product is damage-free within a specified period. The warranty process is usually carried out when a complaint or damage regarding the product is received. The warranty process consists of two decisions that the company establishes to handle the process. The occurring problem is in the warranty process; there is not any standard established to determine the cost to incur for the warranty process. In this research, integer programming method was used to do optimization on repair and replacement strategy in warranty process. Before doing optimization, mathematical model must be created. Using that mathematical model, the results show that the costs of the warranty process decrease by 16.97%, while the time increases by 13.9%. So, with this method company will be increase the profit.
Volume: 16
Issue: 6
Page: 2683-2691
Publish at: 2018-12-01

A Sub-Region Based Space Vector Modulation Scheme for Dual 2-Level Inverter System

10.11591/ijece.v8i6.pp4902-4911
R. Palanisamy , A. Velu , K. Selvakumar , D. Karthikeyan , D. Selvabharathi , S. Vidyasagar
This paper deals the implementation of 3-level output voltage using dual 2-level inverter with control of sub-region based Space Vector Modulation (SR-SVM). Switching loss and voltage stress are the most important issues in multilevel inverters, for keep away from these problems dual inverter system executed. Using this proposed system, the conventional 3-level inverter voltage vectors and switching vectors can be located. In neutral point clamped multilevel inverter, it carries more load current fluctuations due to the DC link capacitors and it requires large capacitors. Based on the sub-region SVM used to control IGBT switches placed in the dual inverter system. The proposed system improves the output voltage with reduced harmonic content with improved dc voltage utilisation. The simulation and hardware results are verified using matlab/simulink and dsPIC microcontroller.
Volume: 8
Issue: 6
Page: 4902-4911
Publish at: 2018-12-01

Developing Fuzzy Inference System of the Observed Albireo Star’s Trail using Surface Meteorological Parameter over ITERA Astronomical Observatory (IAO)

10.12928/telkomnika.v16i6.9106
Wahyu Sasongko; Institut Teknologi Sumatera (ITERA) Putro , Wirid; Institut Teknologi Sumatera (ITERA) Birastri , Robiatul; Institut Teknologi Sumatera (ITERA) Muztaba , Anissa Novia Indra; Institut Teknologi Sumatera (ITERA) Putri , Nindhita; Institut Teknologi Sumatera (ITERA) Pratiwi , Hakim Luthfi; Institut Teknologi Sumatera (ITERA) Malasan
This study aims to develop Fuzzy Inference System (FIS) trail of star seeing over ITERA Astronomical Observatory (IAO) using surface meteorological parameter during site selection to develop observatory. The one-day surface meteorological observation such as Pressure (P), Temperature (T), and Humidity (H) and trail of Albireo (β Cyg) star seeing value was taken from Mt. Betung, Lampung, Indonesia. The surface meteorological data are analyzed to obtain Albireo (β Cyg) star seeing value in 3 to 4 August 2017. By using statistical method obtained the seeing value in daily variation of Albireo (β Cyg) star trail with surface meteorological as a predictor parameter. The standard error of estimate (S-Value) between predictor parameter (pressure and humidity) with Albireo star seeing are reached 0.0027543 in two days variation. Based on the result, the three Membership Functions (MFs) with Gaussian function was proposed in this study to develop FIS trail of star. The result shows that the configuration analysis from input parameter FIS with 15 role bases from surface meteorological parameter has successful to targeted with Albireo (β Cyg) star trail. The 15 role bases from FIS was used to estimate seeing value from meteorological parameter in near future.
Volume: 16
Issue: 6
Page: 2980-2987
Publish at: 2018-12-01

Implementation of Integration VaaMSN and SEMAR for Wide Coverage Air Quality Monitoring

10.12928/telkomnika.v16i6.10152
Yohanes Yohanie Fridelin; Politeknik Elektronika Negeri Surabaya Panduman , Adnan Rachmat Anom; Politeknik Elektronika Negeri Surabaya Besari , Sritrusta; Politeknik Elektronika Negeri Surabaya Sukaridhoto , Rizqi Putri Nourma; Nahdlatul Ulama University of Surabaya Budiarti , Rahardhita Widyatra; Okayama University Sudibyo , Funabiki; Okayama University Nobuo
The current air quality monitoring system cannot cover a large area, not real-time and has not implemented big data analysis technology with high accuracy. The purpose of an integration Mobile Sensor Network and Internet of Things system is to build air quality monitoring system that able to monitor in wide coverage. This system consists of Vehicle as a Mobile Sensors Network (VaaMSN) as edge computing and Smart Environment Monitoring and Analytic in Real-time (SEMAR) cloud computing. VaaMSN is a package of air quality sensor, GPS, 4G WiFi modem and single board computing. SEMAR cloud computing has a time-series database for real-time visualization, Big Data environment and analytics use the Support Vector Machines (SVM) and Decision Tree (DT) algorithm. The output from the system are maps, table, and graph visualization. The evaluation obtained from the experimental results shows that the accuracy of both algorithms reaches more than 90%. However, Mean Square Error (MSE) value of SVM algorithm about 0.03076293, but DT algorithm has 10x smaller MSE value than SVM algorithm.
Volume: 16
Issue: 6
Page: 2630-2642
Publish at: 2018-12-01

Orientation to Happiness as a Predictor of University Students’ Engagement

10.11591/ijere.v7i4.15446
Maria Fernanda Durón-Ramos , Fernanda García Vázquez
There is empirical evidence for a close link between positive personal components and students' engagement in academic activities. Personal well-being is a construct that can be studied from a variety of angles. Recent studies point to the relevance of orientation to happiness examining three types of well-being. The main objective of this study is to test the relationship that orientation to happiness has with university students' engagement at a public institution in northern Mexico. A stratified probabilistic sample of 266 students was used. The internal consistency of the scales was analyzed using the SPSS package and a model of structural equations in the EQS program. Results indicate is a direct and significant relationship between the orientation to happiness and the students' engagement. This supports the importance of promoting positive factors in students to improve their academic and personal development.
Volume: 7
Issue: 4
Page: 294-298
Publish at: 2018-12-01
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