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29,922 Article Results

A decentralized consensus application using blockchain ecosystem

10.11591/ijece.v10i6.pp6399-6411
Chetana Pujari , Balachandra Muniyal , Chandrakala C. B.
The consensus is a critical operation of any decision-making process. It involves a set of eligible members; whose decision need to be honored by taking their acknowledgment before making any decision. The traditional consensus process follows centralized architecture, the members need to rely on and trust this architecture. The proposed system aims to develop a secure decentralized consensus application in the untrusted environment by making use of blockchain technology along with smart contract and interplanetary file system (IPFS).
Volume: 10
Issue: 6
Page: 6399-6411
Publish at: 2020-12-01

A beamforming study of the linear antenna array using grey wolf optimization algorithm

10.11591/ijeecs.v20.i3.pp1538-1546
Asma Issa Mohsin , Asaad S. Daghal , Adheed Hasan Sallomi
The grey wolf optimization (GWO) algorithm is considered an inspired meta-heuristic algorithm, which inspired by the social hierarchy and hunting behavior of the grey wolves. GWO has a high-performance capability of solving constrained, as well as unconstrained optimization problems. In this paper, the beamforming of smart antennas in a code division multiple access system based on the GWO algorithm is investigated. The sidelobe level (SLL) is minimized along with peak sidelobe level reduction, as well as an optimal beam pattern has been accomplished by using GWO to uniform linear antenna arrays. In this work, an amplitude is introduced as constant, while the interspacing distance between antenna array elements and the number of elements in a linear array are variables. The simulation results show that a faster convergence and likely high accurate beamforming are gained using GWO based method. Finally, it is shown that the GWO outperforms the genetic algorithm (GA) based method.
Volume: 20
Issue: 3
Page: 1538-1546
Publish at: 2020-12-01

Powerful processing to three-dimensional facial recognition using triple information

10.11591/ijaas.v9.i4.pp326-332
Mohammad Karimi Moridani , Ahad Karimi Moridani , Mahin Gholipour
Face Detection plays a crucial role in identifying individuals and criminals in Security, surveillance, and footwork control systems. Face Recognition in the human is superb, and pictures can be easily identified even after years of separation. These abilities also apply to changes in a facial expression such as age, glasses, beard, or little change in the face. This method is based on 150 three-dimensional images using the Bosphorus database of a high range laser scanner in a Bogaziçi University in Turkey. This paper presents powerful processing for face recognition based on a combination of the salient information and features of the face, such as eyes and nose, for the detection of three-dimensional figures identified through analysis of surface curvature. The Trinity of the nose and two eyes were selected for applying principal component analysis algorithm and support vector machine to revealing and classification the difference between face and non-face. The results with different facial expressions and extracted from different angles have indicated the efficiency of our powerful processing.
Volume: 9
Issue: 4
Page: 326-332
Publish at: 2020-12-01

A new block cipher for image encryption based on multi chaotic systems

10.12928/telkomnika.v18i6.13746
Donia Fadhil; Mustansiyiah University Chalob , Amal Abdulbaqi; Mustansiyiah University Maryoosh , Zainab Mohammed; Mustansiyiah University Esa , Elaf Nassir; Mustansiyiah University Abbud
In this paper, a new algorithm for image encryption is proposed based on three chaotic systems which are Chen system,logistic map and two-dimensional (2D) Arnold cat map. First, a permutation scheme is applied to the image, and then shuffled image is partitioned into blocks of pixels. For each block, Chen system is employed for confusion and then logistic map is employed for generating subsititution-box (S-box) to substitute image blocks. The S-box is dynamic, where it is shuffled for each image block using permutation operation. Then, 2D Arnold cat map is used for providing diffusion, after that XORing the result using Chen system to obtain the encrypted image.The high security of proposed algorithm is experimented using histograms, unified average changing intensity (UACI), number of pixels change rate (NPCR), entropy, correlation and keyspace analyses. 
Volume: 18
Issue: 6
Page: 2983-2991
Publish at: 2020-12-01

Comparative study of three different bridge-less converters for reduction of harmonic distortion in brushless DC motor

10.11591/ijeecs.v20.i3.pp1185-1193
Santanu Mondal , Madhurima Chattopadhyay
This paper represents a comparative study of three different types of DC-DC converter that can be used for reduction of total harmonic distortion (THD) in stator current, back electromotive force (EMF) and torque of brush less DC motor. In addition, the topologies of these converters are analysed, and the THD of the output characteristics have also been studied. In this work, SEPIC, Zeta and Flyback converters are considered and their outputs are fed to the BLDCM with the help of universal bridge or six step inverter. Moreover the THD of the output voltages are not only measured for three converters but also reduced by tuning the parameters. At first these three converters are modeled in MATLAB/ Simulink based simulation platform and studied the performance individually and further executed with hardware circuitry. Finally the output parameters from both software simulation and real time hardware are compared for these three converters separately and got satisfactory similar results. Again we studied the performance with these converters in terms of efficiency while fed in the commutation drive circuitry of BLDCM by considering minimum THD. From this comparative simulation results, it has been observed that Zeta converter showed maximum efficiency. Therefore, in real time hardware implementation, the commutation drive circuitry of BLDCM is studied with Zeta converter. With this configuration, a comparatively low THD of stator current, back EMF and electromagnetic torque have been achieved in BLDCM with PID controller.
Volume: 20
Issue: 3
Page: 1185-1193
Publish at: 2020-12-01

Quantitative analysis of Mouza map image to estimate land area using zooming and Canny edge detection

10.12928/telkomnika.v18i6.16179
Yeasmin Ara; East Delta University Akter , Md. Ataur; Premier University Rahman , Mohammad; University of Chittagong Osiur Rahman
In Bangladesh, mouza map is used to maintain the record of land measurement, which is a form of interpreting land ownership as well as estimation. Unfortunately, the automatic determination of land is still under development. As a result, land administrators have to encounter multiple hurdles while evaluating any area by employing local civil engineers. Thus, our country needs an automated land estimation system so that it can reduce time, cost and other difficulties which inspired us to develop a system that requires only mouza map image. Once image acquisition is done, we applied the curvature interpolation techniqueto zoom the map that helps to select any area by the Area Selection Method. The selected area is then segmented by employing the Canny edge detection method. Finally, the area is calculated from the segmented image and extracted features of the selected location. Compared to the field measurement, the system gave the accuracy of 89.8%. Hence, the land administrators will be able to provide the land information to the landowners promptly.
Volume: 18
Issue: 6
Page: 3293-3302
Publish at: 2020-12-01

Application of swarm intelligence algorithms to energy management of prosumers with wind power plants

10.11591/ijece.v10i6.pp6172-6179
P. V. Matrenin , V. Z. Manusov , N. Khasanzoda , D. V. Antonenkov
The paper considers the problem of optimal control of a prosumer with a wind power plant in smart grid. It is shown that control can be performed in non-deterministic conditions due to the impossibility of accurate forecasting of the generation from renewable plants. A control model based on a priority queue of logical rules with structural-parametric optimization is applied. The optimization problem is considered from a separate prosumer, not from the entire distributed system. The solution of the optimization problem is performed by three swarm intelligence algorithms. Computational experiments were carried out for models of wind energy systems on Russky Island and Popov Island (Far East). The results obtained showed the high effectiveness of the swarm intelligence algorithms that demonstrated reliable and fast convergence to the global extreme of the optimization problem under different scenarios and parameters of prosumers. Also, we analyzed the influence of accumulator capacity on the variability of prosumers. The variability, in turn, affects the increase of the prosumer benefits from the interaction with the external global power system and neighboring prosumers.
Volume: 10
Issue: 6
Page: 6172-6179
Publish at: 2020-12-01

A brief review: basic coil designs for inductive power transfer

10.11591/ijeecs.v20.i3.pp1703-1716
Nadia Nazieha Nanda , Siti Hajar Yusoff , Siti Fauziah Toha , Nurul Fadzlin Hasbullah , Amelia Shafina Roszaidie
The inductive power transfer (IPT) has contributed to the fast growth of the electric vehicle (EV) market. The technology to recharge the EV battery has attracted the attention of many researchers and car manufacturers in developing green transportation. In IPT charging system, the coil design is indispensable in enhancing the EV battery charging process performance. This paper starts by describing the two charging techniques; static charging and dynamic charging before further presents the IPT system descriptions. Afterwards, this paper describes a brief review of coil designs which discusses the critical factors that affect the power transmission efficiency (PTE) including their basic designs, design concepts and features merits. The discussions on the basic coil designs for IPT are of the circular spiral coil (CSC), square coil (SC), rectangular coil (RC), and double-D coil (DDC). Furthermore, the significant advantages and limitations of each research on different geometries are analyzed and discussed in this paper. Finally, this paper evaluates some essential aspects that influence the coil geometry designs in practical.
Volume: 20
Issue: 3
Page: 1703-1716
Publish at: 2020-12-01

Analysis of HVDC breakdown characteristic of LLDPE-natural rubber added with biofiller as high voltage insulating material

10.11591/ijeecs.v20.i3.pp1203-1209
Nor Izzati Mohd Salleh , Nor Akmal Mohd Jamail , Nishanti Suntharasaka , Nor Shahida Mohd Jamail , Mohamad Farid Sies , Qamarul Ezani Kamarudin , Mohamed Afendi Mohamed Piah
The influence of solid insulation has been investigated by few researchers. The mechanism of solid breakdown is important in insulation studies. In this research, testing on linear low density polythylene (LLDPE) with natural rubber (NR) and different weight concentration of biofiller are conducted under high voltage direct voltage (HVDC) by using needle and sphere types of electrode arrangements. Oil palm empty fruit bunch (OPEFB) and pineapple leaf fiber (PALF) are the biofillers used for the samples development. The LLDPE-NR samples consists of different weight percentages of biofiller which are 0%, 2.5%. 5.0%. 7.5% and 10% with 3mm thickness. The voltage has been increased until the breakdown occurs. Based on the results obtained, OPEFB and PALF with the highest weight percentages of 10% showed the highest damage voltages of 59.09kV and 59.36kV. It has been proven that both samples with the highest filler content have appropriate insulating properties. In conclusion, the addition of biofiber to LLDPE-NR has improved the breakdown properties compared to pure LLDPE.
Volume: 20
Issue: 3
Page: 1203-1209
Publish at: 2020-12-01

Improved fuzzy c-means algorithm based on a novel mechanism for the formation of balanced clusters in WSNs

10.12928/telkomnika.v18i6.14716
Ali Abdul-hussian; Universiti Teknikal Malaysia Melaka Hassan , Wahidah Md; Universiti Teknikal Malaysia Melaka Shah , Abdul-hussien; University of Al-Zahraa for Women Hassan Habeb , Mohd Fairuz Iskandar; Universiti Teknikal Malaysia Melaka Othman
The clustering approach is considered as a vital method for many fields suchas machine learning, pattern recognition, image processing, information retrieval, data compression, computer graphics, and others.Similarly, it hasgreat significance in wireless sensor networks (WSNs) by organizing thesensor nodes into specific clusters. Consequently, saving energy and prolonging network lifetime, which is totally dependent on the sensor’s battery, that is considered asa major challenge in the WSNs. Fuzzyc-means (FCM) is one of classification algorithm, which is widely used in literature for this purpose in WSNs. However, according to the nature of random nodes deployment manner, on certain occasions, this situation forces this algorithm to produce unbalanced clusters, which adversely affects the lifetime of the network.To overcome this problem, a new clustering method called FCM-CMhas been proposed by improving the FCM algorithm to form balanced clustersfor random nodes deployment. The improvement is conductedby integrating the FCM with a centralized mechanism(CM).The proposed method will be evaluated based on four new parameters. Simulation result shows that our proposed algorithm is more superior to FCM by producing balanced clustersin addition to increasing the balancing of the intra-distances of the clusters, which leads to energy conservation and prolonging network lifespan.
Volume: 18
Issue: 6
Page: 2894-2902
Publish at: 2020-12-01

A survey on local binary pattern and gabor filter as texture descriptors of smart profiling systems

10.11591/ijeecs.v20.i3.pp1379-1387
Shihab Hamad Khaleefah , Salama A. Mostafa , Aida Mustapha , Noor Azah Samsudin , Mohammad Faidzul Nasrudin , Abdullah Baz
With the dramatic expansion of image information nowadays, image processing and computer visions are playing a significant role in terms of several applications such as image classification, image segmentation, pattern recognition, and image retrieval. One of the important features that have been used in many image applications is texture. The texture is the characteristic of a set of pixels that formed the image. Therefore, analyzing such texture would have a significant impact on segmenting the image or detecting important portions of such image. This paper aims to overview the feature extraction and description techniques depicted in the literature to characterize regions for images. In particular, two of popular descriptors will be examined including local binary pattern (LBP) and gabor filter. The key characteristic behind such investigation lies in how the features of an image would contribute toward the process of recognition and image classification. In this regard, an extensive discussion is provided on both LBP and Gabor descriptors along with the efforts that have been intended to combine them. The reason behind investigating these descriptors is that they are considered the most common local and global descriptors used in the literature. The overall aim of this survey is to show current trends on using, modifying and adapting these descriptors in the domain of image processing.
Volume: 20
Issue: 3
Page: 1379-1387
Publish at: 2020-12-01

A real-time fault diagnosis system for high-speed power system protection based on machine learning algorithms

10.11591/ijece.v10i6.pp6122-6138
Elmahdi Khoudry , Abdelaziz Belfqih , Tayeb Ouaderhman , Jamal Boukherouaa , Faissal Elmariami
This paper puts forward a real-time smart fault diagnosis system (SFDS) intended for high-speed protection of power system transmission lines. This system is based on advanced signal processing techniques, traveling wave theory results, and machine learning algorithms. The simulation results show that the SFDS can provide an accurate internal/external fault discrimination, fault inception time estimation, fault type identification, and fault location. This paper presents also the hardware requirements and software implementation of the SFDS.
Volume: 10
Issue: 6
Page: 6122-6138
Publish at: 2020-12-01

Hybrid bat-ant colony optimization algorithm for rule-based feature selection in health care

10.11591/ijece.v10i6.pp6655-6663
Rafid Sagban , Haydar A. Marhoon , Raaid Alubady
Rule-based classification in the field of health care using artificial intelligence provides solutions in decision-making problems involving different domains. An important challenge is providing access to good and fast health facilities. Cervical cancer is one of the most frequent causes of death in females. The diagnostic methods for cervical cancer used in health centers are costly and time-consuming. In this paper, bat algorithm for feature selection and ant colony optimization-based classification algorithm were applied on cervical cancer data set obtained from the repository of the University of California, Irvine to analyze the disease based on optimal features. The proposed algorithm outperforms other methods in terms of comprehensibility and obtains better results in terms of classification accuracy.
Volume: 10
Issue: 6
Page: 6655-6663
Publish at: 2020-12-01

Mitigation of non-linear four-wave mixing phenomenon in a fully optical communication system

10.12928/telkomnika.v18i6.16136
Petr; University of Žilina Ivaniga , Tomáš; University of Technology Košice Ivaniga
This paper aims to point out the nonlinear phenomenon occurring in coarse/dense wavelength division multiplex (C/D-WDM) systems. This phenomenon has to betaken into account during the design of the optical network itself, as wavelengthsin the optical fiber are constantly densified. The paper points out the emergence of the non-linear four-wave mixing (FWM) phenomenonand how it relates to the dispersion in the optical fiber together with the transmit power. The output of the paper is a proposed design of the system that points to the improvement of the bit error rate (BER) with a suitable choice of dispersion and suitable transmission power.
Volume: 18
Issue: 6
Page: 2878-2885
Publish at: 2020-12-01

Modelling of solar micro gas turbine for parabolic dish based controller application

10.12928/telkomnika.v18i6.16676
Syariffah; Universiti Teknikal Malaysia Melaka Othman , Mohd Ruddin; Universiti Teknikal Malaysia Melaka Ab. Ghani , Zanariah; Universiti Teknikal Malaysia Melaka Jano , Tole; Universitas Ahmad Dahlan Sutikno
Dish-Stirling unit and photovoltaic panels are the premier technologies available to generate off-grid solar energy. The major issue for both systems is in terms of producing output power. Air-Brayton cycle was utilized asan engine by converting the thermal energy to electricity. Micro gas turbine (MGT) has been recognized as one of the viable alternatives compared to Stirling engines, where it represents a state-of-art parabolic dish engine specifically in turbine gas technology. Hence, the microgas turbine is a technology that is capable of controlling low carbon while providing electricity in off-grid regions. MGT uses any gas as its input like natural gas, bio gas and others. Micro gas turbine has advantages for its high expansion ratio and less moving components. Compared to competing for diesel generators, the electricity costs from hybrid solar units were reduced between 10% and 43%, where  as specific CO2 emissions reduced by 20-35%. MGT provides advantages over photovoltaic systems such as the inherent ability to hybridize the systems with hydrocarbon fuels to produce electricity around the clock, and the ability to operate more effectively in very hot climates with photovoltaic performance degradation over the life time of the  system. Hybrid solar micro gas-turbines are cost-effective, eco-friendly and pollution free as they can work by burning any gas like natural gas,landfill gasa and others.This paper presented the controls contained in the MGT-dish system consisted of temperature control, fuel flow control, speed and acceleration control. Aconceptual design of the 25kW MGT-dish system was also covered.
Volume: 18
Issue: 6
Page: 3184-3190
Publish at: 2020-12-01
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