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  Subjects -> ELECTRONICS (Total: 187 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 7)
Advances in Electronics     Open Access   (Followers: 90)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Power Electronics     Open Access   (Followers: 38)
Advancing Microelectronics     Hybrid Journal  
Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 337)
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 26)
Annals of Telecommunications     Hybrid Journal   (Followers: 9)
APSIPA Transactions on Signal and Information Processing     Open Access   (Followers: 9)
Archives of Electrical Engineering     Open Access   (Followers: 14)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 30)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 20)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 38)
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 13)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 1)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 47)
China Communications     Full-text available via subscription   (Followers: 9)
Chinese Journal of Electronics     Hybrid Journal  
Circuits and Systems     Open Access   (Followers: 15)
Consumer Electronics Times     Open Access   (Followers: 5)
Control Systems     Hybrid Journal   (Followers: 295)
ECTI Transactions on Computer and Information Technology (ECTI-CIT)     Open Access  
ECTI Transactions on Electrical Engineering, Electronics, and Communications     Open Access  
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 117)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 97)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 100)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elkha : Jurnal Teknik Elektro     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 55)
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage Materials     Full-text available via subscription   (Followers: 3)
EPJ Quantum Technology     Open Access   (Followers: 1)
EURASIP Journal on Embedded Systems     Open Access   (Followers: 11)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (Followers: 6)
Foundations and Trends® in Signal Processing     Full-text available via subscription   (Followers: 10)
Frequenz     Hybrid Journal   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 1)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 207)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 4)
IACR Transactions on Symmetric Cryptology     Open Access  
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 99)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 80)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 49)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 9)
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits     Hybrid Journal   (Followers: 1)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 72)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 71)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 58)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 26)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 42)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 19)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 26)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 78)
IEEE Transactions on Signal and Information Processing over Networks     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 5)
IET Cyber-Physical Systems : Theory & Applications     Open Access   (Followers: 1)
IET Energy Systems Integration     Open Access  
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 35)
IET Nanodielectrics     Open Access  
IET Power Electronics     Hybrid Journal   (Followers: 55)
IET Smart Grid     Open Access  
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 18)
IETE Journal of Education     Open Access   (Followers: 4)
IETE Journal of Research     Open Access   (Followers: 11)
IETE Technical Review     Open Access   (Followers: 13)
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems)     Open Access   (Followers: 3)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 70)
Industrial Technology Research Journal Phranakhon Rajabhat University     Open Access  
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 35)
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Instabilities in Silicon Devices     Full-text available via subscription   (Followers: 1)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 13)
International Journal of Advanced Research in Computer Science and Electronics Engineering     Open Access   (Followers: 18)
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems     Open Access   (Followers: 11)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 6)
International Journal of Control     Hybrid Journal   (Followers: 11)
International Journal of Electronics     Hybrid Journal   (Followers: 7)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 13)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal   (Followers: 3)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Hybrid Intelligence     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 16)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 10)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 4)
International Journal of Power Electronics     Hybrid Journal   (Followers: 25)
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 4)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 10)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 4)
International Journal of Wireless and Microwave Technologies     Open Access   (Followers: 6)
International Transaction of Electrical and Computer Engineers System     Open Access   (Followers: 2)
JAREE (Journal on Advanced Research in Electrical Engineering)     Open Access  
Journal of Biosensors & Bioelectronics     Open Access   (Followers: 3)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 11)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 4)
Journal of Computational Intelligence and Electronic Systems     Full-text available via subscription   (Followers: 1)
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 32)
Journal of Electrical Bioimpedance     Open Access  
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electrical Engineering & Electronic Technology     Hybrid Journal   (Followers: 7)
Journal of Electrical, Electronics and Informatics     Open Access  
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 8)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 9)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronics (China)     Hybrid Journal   (Followers: 5)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Engineered Fibers and Fabrics     Open Access   (Followers: 2)
Journal of Field Robotics     Hybrid Journal   (Followers: 3)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 175)
Journal of Information and Telecommunication     Open Access   (Followers: 1)
Journal of Intelligent Procedures in Electrical Technology     Open Access   (Followers: 3)
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 10)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 10)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal  
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal   (Followers: 3)
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 11)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access   (Followers: 4)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 29)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 11)
Journal of Semiconductors     Full-text available via subscription   (Followers: 5)
Journal of Sensors     Open Access   (Followers: 26)
Journal of Signal and Information Processing     Open Access   (Followers: 9)
Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer     Open Access  
Jurnal Rekayasa Elektrika     Open Access  
Jurnal Teknik Elektro     Open Access  
Jurnal Teknologi Elektro     Open Access  
Kinetik : Game Technology, Information System, Computer Network, Computing, Electronics, and Control     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 12)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 7)
Majalah Ilmiah Teknologi Elektro : Journal of Electrical Technology     Open Access   (Followers: 2)
Metrology and Measurement Systems     Open Access   (Followers: 6)
Microelectronics and Solid State Electronics     Open Access   (Followers: 27)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 41)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal   (Followers: 1)
Networks: an International Journal     Hybrid Journal   (Followers: 5)
Open Electrical & Electronic Engineering Journal     Open Access  
Open Journal of Antennas and Propagation     Open Access   (Followers: 9)
Optical Communications and Networking, IEEE/OSA Journal of     Full-text available via subscription   (Followers: 15)
Paladyn. Journal of Behavioral Robotics     Open Access   (Followers: 1)
Power Electronics and Drives     Open Access   (Followers: 2)
Problemy Peredachi Informatsii     Full-text available via subscription  
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Pulse     Full-text available via subscription   (Followers: 5)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Advances in Communications and Networking Technology     Hybrid Journal   (Followers: 3)
Recent Advances in Electrical & Electronic Engineering     Hybrid Journal   (Followers: 9)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 5)
Revue Méditerranéenne des Télécommunications     Open Access  
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 56)
Semiconductors and Semimetals     Full-text available via subscription   (Followers: 1)
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 2)
Services Computing, IEEE Transactions on     Hybrid Journal   (Followers: 4)
Software Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 78)
Solid State Electronics Letters     Open Access  
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 13)
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 3)
Synthesis Lectures on Power Electronics     Full-text available via subscription   (Followers: 3)
Technical Report Electronics and Computer Engineering     Open Access  
TELE     Open Access  
Telematique     Open Access  
TELKOMNIKA (Telecommunication, Computing, Electronics and Control)     Open Access   (Followers: 9)
Transactions on Electrical and Electronic Materials     Hybrid Journal  
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Ural Radio Engineering Journal     Open Access  
Visión Electrónica : algo más que un estado sólido     Open Access   (Followers: 1)
Wireless and Mobile Technologies     Open Access   (Followers: 6)
Wireless Power Transfer     Full-text available via subscription   (Followers: 4)
Women in Engineering Magazine, IEEE     Full-text available via subscription   (Followers: 11)
Електротехніка і Електромеханіка     Open Access  

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TELKOMNIKA (Telecommunication, Computing, Electronics and Control)
Journal Prestige (SJR): 0.265
Citation Impact (citeScore): 1
Number of Followers: 9  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1693-6930 - ISSN (Online) 2302-9293
Published by Universitas Ahmad Dahlan Homepage  [18 journals]
  • A Low cost Fractal CPW fed antenna for UWB applications with a circular
           radiating patch

    • Authors: Akram EL HAMDOUNI, Abdelali Tajmouati, Jamal Zbitou, Hamid Bennis, Mohamed Latrach, Ahmed Ahmed Errkik, Larbi El Abdellaoui
      Abstract:  In this study a validated antenna into simulation and through measurement has been described and analyzed. The Coplanar waveguide (CPW) technique has been chosen to feed the radiating patch while the two ground planes have been partially designed in the top side of the substrate. The fractal geometry, applied to the circular radiator, has been obtained by merging the circular and rectangular shapes. The fiberglass FR-4, with a single side of 35μm copper thickness, has been used to achieve the antenna material with a permittivity of 4.4, a thickness of 1.6mm, a loss tangent of 0.025 and an overall dimension of 34x43mm2. The proposed CPW fractal antenna has been configured to operate in the frequency range 3.1-10.6GHz published by the Federal Communications Commission (FCC) as an Ultra-wide band (UWB). To calculate the return loss, the gain, the current density and the radiation pattern of the simulated antenna, two electromagnetic solvers have been involved which are the CST Microwave studio and ADS. The series of measurement have been performed by using the Network Analyzer and the anechoic chamber in order to confirm the computed antenna. 
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12666
      Issue No: Vol. 17, No. 6 (2019)
       
  • Pulse Width Modulation Control Techniques for Three-phase three
           Level-Inverter Drives.

    • Authors: Arkan A. Kadum
      Abstract: In this paper, two very efficient pulse width modulation techniques were discussed named Sin pulse width modulation and space vector pulse width modulation.  The basic structure of the three-level inverter neutral point clamped is introduced and the basic idea about space vector pulse width modulation for three-level voltage source inverter has been discussed in detail. Nearest three vectors space vector pulse width modulation control algorithm is adopted as the control strategy for the three-phase three-level NPC inverter in order to compensate the neutral-point shifting. The mathematical formulation for calculating the switching sequence has determined.Comparative analysis proving superiority of the space vector pulse width modulation technique over the conventional pulse width modulation, and the results of the simulations of inverter confirm the feasibility and advantage of the space vector pulse width modulation strategy over sin pulse width modulation in terms of good utilization of dc-bus voltage, low current ripple and reduced switching frequency. Space Vector pulse width modulation provides advantages better fundamental output voltage and useful in improving harmonic performance and reducing total harmonic distortion.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12440
      Issue No: Vol. 17, No. 6 (2019)
       
  • Similarity Measurement on Digital Mammogram Classification

    • Authors: Erna Alimudin, Hanung Adi Nugroho, Teguh Bharata Adji
      Abstract: Breast cancer is one of the dominant cause of death in the world. The possibility of recovery which is treated at an early step is approaching 95%. Mammography is the gold standard for early detection. In examining mammogram the overall parenchyma pattern of the left and right breast placed side by side for symmetry assessed of left and right breast tissue by radiologist. Thus, in building Computer Aided Diagnosis (CAD) system for screening mammography, it is necessary to adapt the working procedure of the radiologist. In this study, 30 training images and 30 testing images from Klinik Onkologi Kotabaru Yogyakarta were used. The first step was enhancing the image quality with median filter and contrast limited adaptive histogram equalization (CLAHE). Then, feature extraction was processed by histogram-based and by Gray Level Co-Occurrence Matrix (GLCM) based. Furthermore, the similarity measurement process was used to measure the difference value between features on left and right mammogram. This process was intended to appraise symmetry of left and right mammogram as radiologists did in screening mammography. The results of the classification between normal and abnormal images with Error Back Propagation (EBP) algorithm were accuracy 93.3%, sensitivity 100%, and specificity 83.3%.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.10698
      Issue No: Vol. 17, No. 6 (2019)
       
  • Novel Cross-coupled Microstrip Bandpass Filter with Hairpin-DGS Resonator
           Using Coupling Matrix Technique

    • Authors: mehdi bendamou
      Abstract: This paper introduces a new    method of the BPF design has adopted   which is the defected ground structure (DGS). A new type of microstrip BPF based on coupled DGS resonators is designed using coupling matrix method. We also presented, the equivalent circuit of the proposed BPF based on the equivalent circuit model of the DGS, which is derived from the equivalent inductance and capacitance that appeared due to the perturbed ground current in the ground plane due to the presence of the slot.We introduce new compact Hairpin-DGS resonators and investigate different external coupling mechanisms; we show that the feed configuration affects the response of the filter rather significantly. A four order filter with chebyshev responses has been proposed to suppress harmonics. The new BPF is very compact, in addition, the filter has a very wide stopband with two transmission zeros.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12447
      Issue No: Vol. 17, No. 6 (2019)
       
  • Improved Backtracking Search Optimization Algorithm for PV/Wind/FC system

    • Authors: Jihane Kartite, Mohamed Cherkaoui
      Abstract: This paper uses a novel optimization method based on the Improved Backtracking Search optimization Algorithm (IBSA).The study is conducted for a hybrid stand-alone system composed of photovoltaic panel (PV), wind turbine generator and Fuel Cell electrolyzer (FC).To demonstrate the effectiveness of the IBSA , four benchmark functions are used. The result shows the better exploration and exploitation of the improved backtracking search optimization algorithm in terms of convergence and speed for system comprinsing PV panel wind turbine generator and fuel cell.The proposed algorithm is used to optimize the Annual Total Cost (ATC) of the energy produced while satisfying the load demand. The economic evaluation of the Hybrid PV/Wind/FC system is done throughout hourly demand and daily wind speed and insulation. The simulation results justify the robustness and the effectiveness of the IBSA.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.11887
      Issue No: Vol. 17, No. 6 (2019)
       
  • MIMO CHANNELS: Optimizing Throughput and Reducing Outage by Increasing
           Multiplexing Gain

    • Authors: Oboyerulu Agboje, Nsikan Nkordeh, Stanley Idiake Uzairue, Ololade Oladoyin, Kennedy Okokpujie, Bob-Manuel Ibinabo, Olaitan Alashiri
      Abstract: The two main aims of deploying Multiple Input Multiple out (MIMO) are to achieve spatial diversity (improves channel reliability) and spatial multiplexing (increase data throughput). Achieving both in a given system is impossible for now, and a trade-off has to be reached as they may be conflicting objectives. The basic concept of multiplexing: divide (multiplex) transmit a data stream several branches and transmit via several (independent) channels. In this paper, we focused mainly on achieving spatial multiplexing by modeling the channel using the diagonal Bell Labs space time scheme (D-BLAST) and the vertical Bell Labs space time architecture (V-BLAST) Matlab simulations results were also given to further compare the advantages of spatial multiplexing.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.8720
      Issue No: Vol. 17, No. 6 (2019)
       
  • Wireless Power Transfer enabled NOMA Relay Systems: Two SIC modes and
           Performance Evaluation

    • Authors: Dinh-Thuan Do
      First page: 2697
      Abstract: In this study, we deploy design and performance analysis in new system model using a relaying model, energy harvesting, and non-orthogonal multi-access (NOMA) network. It is called such topology as wireless powered NOMA relaying (WPNR). In the proposed model, NOMA will be investigated in two cases including single successive interference cancellation (SIC) and dual SIC. Moreover, the simultaneous wireless information and power transfer (SWIPT) technology can be employed to feed energy to relays who intend to serve far NOMA users. In particular, exact outage probability expressions are provided to performance evaluation. The results from the simulations are used to demonstrate the outage performance of the proposed model in comparison with the current models and to verify correct of derived expressions
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12218
      Issue No: Vol. 17, No. 6 (2019)
       
  • 1st Order Parallel Coupled BPF with Wideband Rejection Based on SRR and
           CSRR

    • Authors: Adham Rabea Azeez
      First page: 2704
      Abstract: In this paper a new approach for first order Chebyshev parallel coupled Bandpass filter resonant at 1 GHz is presented to obtain better results (wideband rejection, high selectivity and low bandpass insertion loss) compared to conventional design. The proposed filter (a tri-formation consisting of CSRR, SRR and stubs of stepped impedance are loaded microstrip resonator) can be configured, by laying split ring resonator (SRR) and complementary split ring resonator (CSRR) with 50 Ω microstrip lines, in addition to effect of loading two stubs of stepped impedance around center of midline microstrip with impedance line 55.36 Ω of parallel coupled. The proposed filter produces high selectivity from passband to stopband transition   equals to 307.5dB/GHz and an excellent wide stopband performance extend from 1.22GHz to 5 GHz (harmonics repression till for 5 ƒ0); all are bellow -20dB excepting one transmission zero of -19dB, that can be eliminate the harmonic superior frequencies without using any external Bandstop filter. Also enhancement low bandpass insertion loss level, where it reaches 0.25dB at fundamental centered frequency (ƒ0=0.96 GHz) with 21% bandwidth. The proposed filter is designed and simulated with computer aided of Ansoft HFSS software package which ordinarily used in microwave application.  
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.10790
      Issue No: Vol. 17, No. 6 (2019)
       
  • Enhancement Algorithm for Reverse Loop Technique on Planar Reverse Loop
           Antenna (PRLA)

    • Authors: Mohamad Harris Misran
      First page: 2713
      Abstract: Finding a trade-off balance between wireless transfer efficiency (WTE) and distance is a key issue in wireless energy transfer (WET). This paper presents a method of reducing the radical alteration in WTE versus distance, by using a reverse loop technique on planar reverse loop antenna (PRLA). The design focuses on 13.56 MHz Near Field Communication (NFC). The first stage uses mathematical modelling, based on an analytical approach, to determine the size of the reverse loop using Matlab. The proposed model predicts the size of the reverse loop to stabilize the WTE at a closer distance. Next, full-wave electromagnetic simulations are applied, using the computer simulation technology (CST) MICROWAVE STUDIO®, to determine the WTE effect with distance changes with mismatch condition. Planar loop antennas (PLAs) are fabricated on glass-reinforced epoxy laminated sheets (FR4). A validation of the simulation result in a real test scenario, using these PLAs and PRLA, confirms a stability enhancement in WTE at closer distance using the reverse loop technique, compared to conventional designs.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12087
      Issue No: Vol. 17, No. 6 (2019)
       
  • Blind Frequency Offset Estimator for OFDM Systems

    • Authors: Sakina Atoui, Noureddine Doghmane, Saddek Afifi
      First page: 2722
      Abstract: Orthogonal Frequency Division Multiplexing (OFDM) is of great interest for the development of fifth generation technology. It is the cornerstone of Multiple-input multiple-output (MIMO) systems. Even though inter carrier interference (ICI) and inter symbol interference (ISI) have been processed for fourth-generation standards, they still present a huge problem for fifth generation standards. This paper explores the tradeoff between the length of the cyclic prefix and the performances of the OFDM system. It studies the effect of carrier frequency offset (CFO) on OFDM systems. A blind frequency offset estimator that uses the correlations between the remodulated sequence in the receiver side and the conventional received symbol are presented and a closed form solution is derived. The proposed estimator is derived under short interval when the correlation is high, so it has low computational complexity. Lin and Beek’s estimators are used for comparison. Simulations demonstrate the effectiveness of the proposed estimator under Rayleigh fading channel.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.11957
      Issue No: Vol. 17, No. 6 (2019)
       
  • Design and Implementation of Low Power Consumption Wireless Sensor Node

    • Authors: imededdin djadour, Salih Aidel, Hicham Medkour
      First page: 2729
      Abstract: This work proposes an implementation of wireless sensor node characterized by its very low power consumption. The node comprises three main components: Xbee module, low power PIC microcontroller and digital sensor. The node can be set to sense then transmit data via one of two transmission methods: periodic and by interruptions.To evaluate the power consumption; currents in the node are measured during the different transmission stages for both methods. As a result, a significant reduction in the power consumption is shown particularly in sleep mode compared to conventional transmission methods. The characteristic of low power consumption makes the proposed node practically ecologic. It can also be fed with the extrem low power supplied by an energy harvesting system.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12047
      Issue No: Vol. 17, No. 6 (2019)
       
  • Cognitive radio for TVWS usage

    • Authors: Cesar Hernandez, Diego Pineda
      First page: 2735
      Abstract: Spectrum scarcity is an emerging issue in wireless communications systems due to the increasing demand of broadband services like mobile communications, wireless internet access, IoT applications, among others. The migration of analog TV to digital systems (a.k.a. TV digital switchover) has come with a release of significant spectrum that can be used to support those additional services. Likewise, TV white spaces emerge as spectrum opportunities to be explored too. Hence, cognitive radio (CR) looks like a feasible approach to exploit those gaps within the spectrum towards using these scarce resources efficiently. The goal of this paper is to show the state of the art around the TV white spaces usage, some of the most important approaches developed to exploit them, the upcoming opportunities and challenges for future research, and a suggestion to improve the current models. This paper starts by presenting an overview of the concepts involved in the subject, followed by a description of some actual applications and pilots developed on the field mostly focused in the USA, UK and Colombian cases, then an analysis of the challenges and opportunities are presented and it is closed with some final conclusions.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13111
      Issue No: Vol. 17, No. 6 (2019)
       
  • Integrated Smart Door System in Apartment Room based on Internet

    • Authors: Muchammad Husni, Henning Titi Ciptaningtyas, Ridho Rahman Hariadi, Siska Arifiani, Irzal Ahmad Sabilla
      First page: 2747
      Abstract: Internet of Things (IoT) is technology which provides communication between machines without human intervention. There are many applications that implement IoT technology e.g. smart power, smart home, transportation management, and smart city. This paper proposes the usage of IoT to develop electronic key that can help to improve the security in apartment.Electronic key uses Android smart phone to access and control the door. Electronic key uses Raspberry pii, motor DC, webcam, microswitch, and Arduino GSM. Raspberry is used to get command from server and instruct the Arduino GSM to open or close the door and webcam is used to take picture from the environment for documentation. This research uses three steps to verify the user who want to open or close the door i.e. using username and password, Bluetooth, and QRcode scanner.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12322
      Issue No: Vol. 17, No. 6 (2019)
       
  • Baud Rate Variations Effect on Virtual Channel based on PIC
           Microcontroller

    • Authors: Hussein M Hathal, Sarmad K. Ibrahim, Riyadh A Abdulhussein
      First page: 2755
      Abstract: Recent year in the world the real applications, usually needed only a few key features of Universal Asynchronous Receiver Transmitter (UART). It is a type of serial communication protocol, which improves the problem of parallel communication and develops effectively in several services. This paper presents a transceiver system based on PIC microcontroller. It also shows software designs to transmit and receive data through the virtual channel. The system is designed to study the effects of baud rate variations between transmitter and receiver for noise and noiseless AWGN channel. The system has been simulated by Proteus simulator version 8.1, and then tested successfully at baud rates (2400, 4800, 9600, and 19200) bps. Simulation results show that the error rate has zero values at the desired baud rate value, and also, at the adjacent values. Thus, the zero level of error rate is increased by increasing baud rate values, which fixed by the transmitter and vice versa.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12828
      Issue No: Vol. 17, No. 6 (2019)
       
  • Hybrid Decode-Amplify And Forward Protocol (HDAF) of FD EH Relaying
           Network: Outage Probability Analysis

    • Authors: Van-Duc Phan, Duy-Hung Ha, Minh Tran, Tran Thanh Trang, Thanh-Long Nguyen
      First page: 2764
      Abstract: Nowadays, many research papers focus on the WPCN problem and how to improve its efficiency. In this research, we propose and investigate Hybrid Decode-Amplify and Forward Protocol (HDAF) of the Full Duplex (FD) Energy Harvesting (EH) Relaying Network with the Time Switching (TS) protocol. In the beginning stage, we present the HDAF mode, which can be work like a Decode-and-Amplify (DF) or Amplify-and-Forward (AF) modes based on the best of its performance in the FD EH relaying network. Furthermore, the closed-form expression of the outage probability (OT) is analyzed and derived in connection with the primary system parameters. Besides, the comparison of the system performance in the AF, DF, and HDAF is proposed and investigated. Finally, all the results are convinced by the Monte Carlo simulation for all cases.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12973
      Issue No: Vol. 17, No. 6 (2019)
       
  • Modelling of Wireless Sensor Networks for Detection Land and Forest Fire
           Hotspot

    • Authors: Evizal Abdul Kadir
      First page: 2772
      Abstract: Indonesia located in South East Asia countries with tropical region, forest fires in Indonesia is one of big issue and disaster because it happens in almost of every year, this is because of some of region consist of peat land that high risk for fire especially in dry season. Riau Province is one of region that regularly incident of forest fire with affected the length and breadth of Indonesia. Propose development of Wireless Sensor Networks (WSNs) for detection of land and forest fire hotspot in Indonesia as well as one of the main consent in this research, case location in Riau province is at one of the region that high risk forest fire in dry season. WSNs technology used for ground sensor system to collect environmental data. Data training for fire hotspot detection is done in data center to determine and conclude of fire hotspot then potential to become big fire. The deployment of sensors located at several locations that has potential for fire incident, especially as data shown in previous case and forecast location with potential fire happen. Mathematical analysis is used in this case for modelling number of sensor required to deploy and the size of forest area. The design and development of WSNs give high impact and feasibility to overcome current issues of forest fire and fire hotspot detection in Indonesia. The development of this system used WSNs highly applicable for early warning and alert system for fire hotspot detection
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12971
      Issue No: Vol. 17, No. 6 (2019)
       
  • A wireless precoding technique for millimetre-wave MIMO system based on
           SIC-MMSE

    • Authors: Rounakul Islam Boby, Khaizuran Abdullah, A. Z. Jusoh, Nagma Parveen, A. L. Asnawi
      First page: 2782
      Abstract: A communication method is proposed using Minimum Mean Square Error (MMSE) precoding and Successive Interference Cancellation (SIC) technique for millimetre-wave multiple-input multiple-output (mm-Wave MIMO) based wireless communication system. The mm-Wave MIMO technology for wireless communication system is the base potential technology for its high data transfer rate followed by data instruction and low power consumption compared to Long-Term Evolution (LTE). The mm-Wave system is already available in indoor hotspot and Wi-Fi backhaul for its high bandwidth availability and potential lead to rate of numerous Gbps/user. But, in mobile wireless communication system this technique is lagging because the channel faces relative orthogonal coordination and multiple node detection problem while rapid movement of nodes (transmitter and receiver) occur. To improve the conventional mm-wave MIMO nodal detection and coordination performance, the system processes data using symbolized error vector technique for linearization. Then the MMSE precoding detection technique improves the link strength by constantly fitting the channel coefficients based on number of independent service antennas (M), Signal to Noise Ratio (SNR), Channel Matrix (CM) and mean square errors (MSE). To maintain sequentially encoded user data connectivity and to overcome data loss, SIC method is used in combination with MMSE. MATLAB was used to validate the proposed system performance.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i5.12802
      Issue No: Vol. 17, No. 6 (2019)
       
  • A Survey of Value Creation with Big Data Analytics for Enterprises

    • Authors: Ali Mirarab, Seyedeh Leili Mirtaheri, Seyed Amir Asghari
      First page: 2790
      Abstract:  The emergence of Big Data applications has paved the way for enterprises to use Big Data as a value-creation strategy for their business; however, the majority of enterprises fail to know how to generate value from their massive volumes of data. Big Data Analytics results can help the enterprises in better decision-making and provide them with additional profits. Studying different researches dedicated to value creation through Big Data Analytics, the present paper (a) highlights the current state of the solutions proposed for generating value from Big Data Analytics, (b) identifies the essential factors and discusses their effects upon value creation, and (c) provides a classification of the cutting-edge technologies in this field.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.11962
      Issue No: Vol. 17, No. 6 (2019)
       
  • Quality of Service in Bandwidth Adapted Hybrid UMTS/WLAN Interworking
           Network

    • Authors: R. Shankar, P. Danajayan
      First page: 2803
      Abstract: Integration of Universal Mobile Telecommunications System (UMTS) and Wireless Local Area Network (WLAN) result in ubiquitous connection for end users. In the integrated network, ensuring the quality of service to users and enhancing capacity of network are prominent issues. Bandwidth adaptation technique is one of the solutions to overcome these issues. Bandwidth adaptation based on per flow and per class schemes were proposed for loosely coupled interworking network. In this paper, hybrid coupled UMTS and WLAN interworking network is analysed with bandwidth adaptation based on per flow and per class schemes and the performances have been compared. Simulation result shows that the proposed hybrid coupled interworking network with bandwidth adaptation based on per class scheme performs better with enhanced quality of service and network capacity.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.10262
      Issue No: Vol. 17, No. 6 (2019)
       
  • A Brief Review: Security Issues in Cloud Computing and Their Solutions

    • Authors: Iqbal Ahmed
      First page: 2812
      Abstract: Cloud Computing is an Internet-based, emerging technology, tends to be prevailing in our environment especially in the field of computer sciences and information technologies which require network computing on large scale. Cloud Computing is a shared pool of services which is gaining popularity due to its cost, effectiveness, avilability and great production. Along with its numerous benefits, cloud computing brings much more challenging situation regarding data privacy, data protection, authenticated access, Intellectual property rights etc. Due to these issues, adoption of cloud computing is becoming difficult in today’s world. In this review paper, various security issues regarding data privacy and reliability, key factors which are affecting cloud computing, have been addressed and also suggestions on particular areas have been discussed.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12490
      Issue No: Vol. 17, No. 6 (2019)
       
  • Modified RSA-based algorithm: a double secure approach

    • Authors: Israa Al_Barazanchi, Shihab A. Shawkat, Moayed H. Hameed, Khalid Saeed Lateef Al - Badri
      First page: 2818
      Abstract: Security algorithms like RSA is becoming increasingly important for communications to provide companies, organizations and users around the world secure applications who rely heavily on them in their daily work. Security algorithms use different acquaintances among companies which might belong to the various countries or even cities. Such data should essentially be encrypted just to make sure about their security in the transportation. Thus, the current research paper leads to the novel system of security for the safe transfer of data. This paper examines the general principles of encryption and focuses on the development of RSA and the complexity of the encryption key so that it becomes more secure in the applications used. In this project, we will work on the RSA algorithm by adding some complexity to the 3keys(3k). This adding ‎will increase the ‎security and complexity the algorithm's speed with maintain encryption ‎and decryption time‎. The paper also presents an approach by means of public key encryption to enhance the cryptographic security.  Moreover, double security is provided by the algorithm of RSA.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13201
      Issue No: Vol. 17, No. 6 (2019)
       
  • Compression and Encryption for ECG Biomedical Signal in Healthcare System

    • Authors: Mustafa Emad Hameed
      First page: 2826
      Abstract: The ECG data needs large memory storage device due to continuous heart rate logs and vital parameter storage. Thus, efficient compression schemes are applied to it before sending it to the telemedicine center for monitoring and analysis. Proper compression mechanisms can not only improve the storage efficiency but also help in faster porting of data from one device to another due to its compact size. Also, the collected ECG signals are processed through various filtering techniques to remove unnecessary noise and then compressed. In our scheme, we propose use of buffer blocks, which is quite novel in this field. Usage of highly efficient methods for peak detection, noise removal, compression and encryption enable seamless and secure transmission of ECG signal from sensor to the monitor. This work further makes use of AES 256 CBC mode, which is barely used in embedded devices, proves to be very strong and efficient in ciphering of the information. Experimental results prove the efficiency of proposed schemes on five distinct signal records from MIT-BIH arrhythmia datasets.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13240
      Issue No: Vol. 17, No. 6 (2019)
       
  • Kawalpilpres2019: a highly secured real count voting escort architecture

    • Authors: Onno W. Purbo
      First page: 2834
      Abstract: This paper reports on the highly secured information security architecture used by the KawalPilpres 2019 to escort Voting Commission (KPU) data entry. For the first time, a voting escort implements ISO 27001 compliance information security. As of 15 May 2019, 9550 volunteers reported 482,602 voting data of 336,445 voting booths, both in the country and overseas, through the micro-apps KawalPilpres2019. PeSanKita is used as a secure communication channel and to run micro-apps KawalPilpres2019. Double Ratchet Algorithm secures the channel. Different from other voting escort initiatives, KawalPilpres2019 uses (1) primarily C1 Plano photo, (2) no upload limit per voting booth, (3) no web upload, rather via PeSanKita Secured Platform. Behind the scenes, the verification process is done twice before displaying data to the publicly accessible monitoring web. The result is a robust voting escort system, difficult to hack and guarantee data integrity. Guaranteed security, availability, and data integrity are the main requirements for future eVoting systems.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13241
      Issue No: Vol. 17, No. 6 (2019)
       
  • Energy Efficient User Association Mechanism Enabling Fully Hybrid Spectrum
           Sharing Approach Among Multiple 5G mmWave Cellular Operators

    • Authors: Mothana L. Attiah
      First page: 2842
      Abstract: Spectrum sharing (SS) is a promising solution to enhance spectrum utilization in future cellular systems. Reducing the energy consumption in cellular networks has recently earned tremendous attention from diverse stakeholders (i.e., vendors, mobile network operators (MNOs), and government) to decrease the CO2 emissions and thus introducing an environment-friendly wireless communication. Therefore, in this paper, joint energy efficient user association (UA) mechanism and fully hybrid spectrum sharing (EE-FHSS) approach is proposed considering the quality of experience QoE (i.e., data rate) as the main constraint. In this approach, the spectrum available in the high and low frequencies (28 and 73 GHz) is sliced into three portions (licensed, semi-shared, and fully-shared) aims to serve the users (UEs) that belong to four operators in an integrated and hybrid manner. The performance of the proposed QoE-Based EE UA-FHSS is compared with the well-known maximum signal-to-interference-plus-noise ratio (max-SINR UA-FHSS). Numerical results show that remarkable enhancement in terms of EE for the four participating operators can be achieved while maintains a high degree of QoE to the UEs. 
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13058
      Issue No: Vol. 17, No. 6 (2019)
       
  • Impact of Gouy–Chapman–Stern model on conventional ISFET
           Sensitivity and Stability

    • Authors: Ahmed M. Dinar
      First page: 2842
      Abstract: Utilizing Gouy–Chapman–Stern model can improve ISFET sensitivity and stability using Stern layer in direct contact with electrolyte in ISFET sensing window. However, this model remains a challenge in mathematical way, unless it’s re-applied using accurate simulation approaches. Here, we developed an approach using a commercial Silvaco TCAD to re-apply Gouy–Chapman–Stern model as ISFET sensing membrane to investigate its impact on sensitivity and stability of conventional ISFET. Sio2 material andhigh-k Ta2O5 material have been examined based on Gouy–Chapman and Gouy–Chapman–Stern models. Results shows that the ISFET sensitivity of SiO2 sensing membrane is improved from ~38 mV/pH to ~51 mV/pH and the VTH shift stability is also improved. Additionally, the results indicate that the sensitivity of Ta2O5 is 59.03 mV/pH that hit the Nearnst Limit 59.3 mV/pH and achieves good agreements with mathematical model and previous experimental results. In conclusion, this investigation introduces a real validation of previous mathematical models using commercial TCAD approach rather than expensive fabrication that paves the way for further analysis and optimization.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12838
      Issue No: Vol. 17, No. 6 (2019)
       
  • Design of a CMOS-based microwave active transversal channelized bandpass
           filter with elliptic response

    • Authors: Mariem JARJAR
      First page: 2851
      Abstract: two-branch microwave active bandpass filter is designed through the channelized filtering technique as well as the transversal concept. Both the main and the auxiliary branches, connected without power dividers/combiners, rely on C-coupled active third order Chebyshev bandpass filters. A lumped element signal delay circuit is also introduced in the main channel. Active inductors based on the gyrator-C topology, are involved in the Chebyshev filters’ structure. CMOS-based Operational Transconductor Amplifier (OTA) circuits are the building blocks of these inductors. The proposed active transversal channelized filter produces an elliptic narrow band response, centered at 1,13GHz. Simulation results, obtained by means of the PSPICE code according to the 0,18 μm TSMC MOS technology, indicate excellent performances illustrating good impedance matching, low insertion losses and high selectivity. Finally, the noise analysis shows that the filter has a low noise figure in the bandwidth.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.11662
      Issue No: Vol. 17, No. 6 (2019)
       
  • Temperature and electrical characterization of silicon nanowire transistor
           based on channel diameter

    • Authors: Hani Taha AlAriqi, Waheb A. Jabbar, Yasir Hashim, Hadi Manap
      First page: 2860
      Abstract: This paper analyses the temperature sensitivity of Silicon Nanowire Transistor (SiNWT) depends on the diameter (D.ch) of channel. In addition, it also investigates the possibility of utilizing SiNWT as a Nano- temperature sensor. The MuGFET simulation tool has been utilized to conduct a comprehensive simulation to evaluate both electrical and temperature characteristics of SiNWT. Current-voltage characteristics with different values of temperature and with a varying diameter of the Nano wire channel (D.ch = 80, 40, 20 and 10 nm), were simulated. Diode operating mode connection of the transistor is suggested for measuring the temperature sensitivity of SiNWT. As simulation results demonstrated, the best temperature sensitivity was occurred at lower temperature with increasing the channel diameter. We also illustrate the impact of varying temperature and channel diameter on electrical characteristics of SiNWT including, Subthreshold Swing (SS), Threshold voltage (V.th), and Drain-induced barrier lowering (DIBL), which were proportionally increased with the operating temperature.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13084
      Issue No: Vol. 17, No. 6 (2019)
       
  • Performance Analysis of High-K Materials as Stern Layer in Ion-Sensitive
           Field Effect Transistor Using Commercial TCAD

    • Authors: Ahmed M. Dinar
      First page: 2867
      Abstract: High-k materials as a STERN Layer for Ion-Sensitive-Field-Effect-Transistor (ISFET) have improved ISFET sensitivity and stability. These materials decrease leakage current and increase capacitance of the ISFET gate toward highest current sensitivity. So far, many high-k materials have been utilized for ISFET, yet they were examined individually, or using numerical solutions rather than using integrated TCAD environment. Exploiting TCAD environment leads to extract ISFET equivalent circuit parameters and performs full analysis for both device and circuit. In this study we introduce a comprehensive investigation of different high-k material, Tio2, Ta2O5, ZrO2, Al2O3, HfO2 and Si3N4 as well as normal silicon dioxide and their effects on ISFET sensitivity and stability. This was implemented by developing commercial Silvaco TCAD rather than expensive real fabrication. The results confirm that employing high-k materials in ISFET outperform normal silicon dioxide in terms of sensitivity and stability. Further analysis revealed that Titanium dioxide showed the highest sensitivity followed by two groups HfO2, Ta2O5 and ZrO2, Al2O3 respectively. Another notable exception of Si3N4 that is less than other materials ,but still have higher sensitivity than normal silicon dioxide. We believe that this study opens new directions for further analysis and optimization prior to the real cost-ineffective fabrication.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12852
      Issue No: Vol. 17, No. 6 (2019)
       
  • Study the effect of thin film thickness on the optical features of (IR5
           laser dye/ CdSe nanoparticles) samples

    • Authors: Mithaq M. Mehdy Al - Sultani
      First page: 2877
      Abstract: The linear optical features such as ( transmittance T , absorbance A, the effective length  , absorption coefficient   and  refractive index  )  for the thin films samples of ( 3x10-3 mol/l of (IR5)  laser dye , 0.02 gm of ( CdSe ) nanoparticles and 0.04 gm of pp polymer ) had been studied at different values of film thickness in one time and at different number of  Yb:GdVO4 laser  pulses. The non- linear optical features in terms of  Transmittance difference   , Non-linear Refractive index  , Non –linear phase shift     Non-linear absorption coefficient  and Minimum normalized transmittance  have been computed in relation to obtained normalized transmittance data from setup  of Z—scan with open and closed apertures , had been calculated for ( 3x10-3 mol/l of (IR5)  laser dye , 0.02 gm of ( CdSe ) nanoparticles and 0.04 gm of ( pp)  polymer ) thin films at different values of film thickness at  in one time and at different Yb:GdVO4 laser  pulses. Thick films causes in deleting the non-linear effects generated by different layers. The (CdSe)  nanoparticles leads to an absorption shifting of  the wavelengths  to lengthier wavelengths of red shift. So, this can be used in selecting the nanoparticles  and medium with applicable exciting wavelengths . The film thickness and the laser pulses have the main effects in consolidating the Non-linear optical features.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13004
      Issue No: Vol. 17, No. 6 (2019)
       
  • Application of triple-layer remote phosphor configuration results in the
           color quality and luminous efficiency enhancement of WLEDs

    • Authors: Nguyễn Đoàn Quốc Anh, Phan Xuan Le, Dinh Hoang Bach, Nguyen Doan Quoc Anh
      First page: 2885
      Abstract: This study proposed the triple-layer remote phosphor (TRP) structure to enhance the color quality and the emitted luminous flux of white LEDs (WLEDs). The TRP structure consists of three different phosphor layers that are arranged as follows: the yellow YAG:Ce3+ phosphor at the bottom, the red phosphor layer CaMgSi2O6:Eu2+,Mn2+ at the top and the green Ba2Li2Si2O7:Sn2+,Mn2+ phosphor between these two ones. The aim to use the red CaMgSi2O6:Eu2+,Mn2+ phosphor is to control the red light component so that the color rendering index (CRI) could be increased. While the green Ba2Li2Si2O7:Sn2+,Mn2+ phosphor is applied to manage the green light component, leading to the rise in luminous efficacy (LE) of WLEDs. Moreover, when the concentrations of these two phosphors are raised, that of the yellow phosphor YAG:Ce3+ has to be decreased to remain the average correlated color temperatures (ACTTs) in a  range from 6000 K to 8500 K. Furthermore, not only the CRI and LE but the color quality scale (CQS) is also analyzed by controlling the two green and red phosphor concentrations. The researched results show that the higher the concentration of CaMgSi2O6:Eu2+,Mn2+, the more enhancements in the CRI will be made. In contrast, when the Ba2Li2Si2O7:Sn2+,Mn2+ concentration increases, the CRI significantly decreases.  Meanwhile, CQS is likely to considerably rise in a concentration range from 10% to 14% of CaMgSi2O6:Eu2+,Mn2+, regardless of the presence of Ba2Li2Si2O7:Sn2+,Mn2+ concentration.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13335
      Issue No: Vol. 17, No. 6 (2019)
       
  • Review on Fixed-frequency beam steering for leaky wave antenna

    • Authors: J. S. Kasim, M. S. M. ISA, Z. Zakaria, M. M. I. Hussein, Mowafak K. Mohsen
      First page: 2895
      Abstract: This paper aims to survey the efforts of researchers in response to the novel and effective technology of control radiation pattern at a fixed frequency for leaky wave antenna (LWA), map the research landscape from the literature onto coherent taxonomy and determine the basic properties of this potential field. In addition, this paper investigates the motivation behind using beam steering in LWA and the open challenges that impede the utility of this antenna design. This paper offers valuable recommendations to improve beam steering in LWA. The review revealed the development and improvement of several techniques of beam scanning LWA. However, several areas or aspects require further attention. All the articles, regardless of their research focus, attempt to address the challenges that impede the full utility of beam scanning and offer recommendations to mitigate their drawbacks. This paper contributes to this area of research by providing a detailed review of the available options and problems to allow other researchers and participants to further develop beam scanning. The new directions for this research are also described.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13291
      Issue No: Vol. 17, No. 6 (2019)
       
  • Clarification of Optimum Silica Nanofiller on Treeing in Silicone Rubber

    • Authors: Mohd Hafizi Ahmad
      First page: 2903
      Abstract: This paper aims to clarify the optimum amount of fumed silica (SiO2) nanofiller in resisting the initiation and propagation of electrical treeing in silicone rubber (SiR). Unlike other works, SiR/SiO2 nanocomposites containing seven different weight percentages of SiO2 nanofiller were prepared for this purpose. To achieve the objective, the electrical tree characteristics of the SiR/SiO2 nanocomposites were investigated by comparing the tree initiation voltage, tree breakdown time, tree propagation length and tree growth rate with its equivalent unfilled SiR. Moreover, the structural morphological analysis was conducted on the SiR/SiO2 nanocomposite samples. The results showed that the SiR, when added with an appropriate amount of SiO2 nanofiller, could result in an improved electrical tree resistance. It implies that the 5wt% of silica is the optimum amount to achieve the optimal electrical tree resistance such that above 5wt%, the tree resistance performance has been abruptly reduced, subjected to the agglomeration issue.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.10605
      Issue No: Vol. 17, No. 6 (2019)
       
  • Study on the performance indicators for smart grids: a comprehensive
           review

    • Authors: Surender Reddy Salkuti
      First page: 2912
      Abstract: This paper presents a detailed review on performance indicators for smart grid (SG) such as voltage stability enhancement, reliability evaluation, vulnerability assessment, Supervisory Control and Data Acquisition (SCADA) and communication systems. Smart grids reliability assessment can be performed by analytically or by simulation. Analytical method utilizes the load point assessment techniques, whereas the simulation technique uses the Monte Carlo simulation (MCS) technique. The reliability index evaluations will consider the presence or absence of energy storage elements using the simulation technologies such as MCS, and the analytical methods such as systems average interruption frequency index (SAIFI), and other load point indices. This paper also presents the difference between SCADA and substation automation, and the fact that substation automation, though it uses the basic concepts of SCADA, is far more advanced in nature.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13285
      Issue No: Vol. 17, No. 6 (2019)
       
  • Electrode Size Influence on Single Cell Lead Acid Battery with Dynamic and
           Static Electrolyte Treatment

    • Authors: Muhammad Ghufron
      First page: 2919
      Abstract: Renewable energy such as solar energy, waves and wind require batteries as a storage of electrical energy which still has constraints related to voltage, capacity, and energy efficiency. This experiment aims to determine the effect of electrode size on lead acid dynamic and static battery capacity and energy efficiency. Dynamic and static single cell lead acid batteries consist of three different electrode sizes, 13.5 x 7.5 cm2 (A1); 22.5 x 7.5 cm2 (A2) and 32.5 x 7.5 cm2 (A3) have been developed. Continuous and simultaneous charge-discharge test using turnigy accucell-6 50w and chargemaster 2.02 software as graphic programming. Based on experiments, dynamic batteries perform better than static batteries with a difference in capacity of up to 48% and differences in energy efficiency up to 17%. The best performance is obtained on A3 dynamic batteries with an average capacity capacity of 10357 mAh and an average energy efficiency of 81%.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.11913
      Issue No: Vol. 17, No. 6 (2019)
       
  • Ba[Mg2Al2N4]Eu2+ phosphor for enhancing the optical quality of the 6600K
           CPW-LEDs

    • Authors: Van-Duc Phan, Duy-Hung Ha, Minh Tran, Tran Thanh Trang
      First page: 2926
      Abstract: Compared with conventional lamps, LED-based light sources have a superior lifetime, efficiency, and reliability, which promise significant reductions in power consumption and pollution from fossil fuel power plants. In this paper, we proposed and investigated the effect of the concentration of Ba[Mg2Al2N4]Eu2+conversion phosphor on the CCT deviation (D-CCT) and lumen output (LO) of the 6600 K conformal-packaging white LEDs (CPW-LEDs). For this purpose, we used the Light Tools and Mat Lab software to investigate this problem. From the research results, we can state that the concentration of the red phosphor has a significant effect on the optical quality of the 6600 K CPW-LEDs. The D-CCT can be decreased from 4700K to 2500K, and the LO can be increased from 600 lm. to 1200 lm. This research can provide the new recommendation for LEDs industry at this time.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13090
      Issue No: Vol. 17, No. 6 (2019)
       
  • The usage of dual-layer remote phosphor configurations in enhancing color
           quality and luminous flux of WLEDs

    • Authors: Nguyễn Đoàn Quốc Anh, Phan Xuan Le, Dinh Hoang Bach, Nguyen Doan Quoc Anh
      First page: 2931
      Abstract: Among conformal phosphor structure, in-cup phosphor structure, and remote phosphor structure, while in term of attaining the highest luminous flux, remote phosphor structure is the most ideal one, it seems to be that this structure results in the lowest-quality of color. Therefore, it is necessary in conducting experiments to surmount this disadvantage and make a possibility in enhancing the color quality of WLEDs with remote phosphor structure. In this research, with the ability of advancing the color rendering index (CRI) and color quality (CQS) for WLEDs, a dual-layer remote phosphor structure was considered as a suggestion. The experiments in this study used three kinds of WLEDs with the similar structures but different color temperatures varying at 5600 K, 7000 K, and 8500 K. The objectives of this paper is proposing a solution to obtain the highest color quality by placing a yellow-green emitting SrBaSiO4:Eu2+ phosphor layer or a red-emitting SrwFxByOz:Eu2+,Sm2+ phosphor layer on the YAG:Ce3+ phosphor layer and then choosing the most appropriate value of SrwFxByOz:Eu2+,Sm2+ concentration. The experimental results which are satisfied expectations of researchers indicated that SrwFxByOz:Eu2+,Sm2+ has enforced its role in managing to raise the CRI and CQS. Particularly, the greater concentration of SrwFxByOz:Eu2+,Sm2+ leads to the higher the CRI and CQS, since the red light component in WLEDs increased. Besides, the quality of luminous flux is in a tight connection with the SrBaSiO4:Eu2+ phosphor layer.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13093
      Issue No: Vol. 17, No. 6 (2019)
       
  • Benefits of triple-layer remote phosphor structure in improving color
           quality and luminous flux of white LED

    • Authors: Thuc Minh Bui, Phan Xuan Le, Dinh Hoang Bach, Nguyen Doan Quoc Anh
      First page: 2940
      Abstract: Remote phosphor structure has higher luminous efficiency comparing to that of both conformal phosphor and in-cup phosphor structures. However, it is hard to control the color quality of remote phosphor structure, and this issue has become one of the most researchable objectives to many researchers in recent years. Up to now, there are two remote phosphor structures applied to improve the color quality, including dual-layer phosphor configuration and triple-layer phosphor configuration. The purpose of this research is to select one of those configurations to have multi-chip white LEDs (WLEDs) achieved the highest color rendering index (CRI), color quality scale (CQS), luminous efficacy (LE), and color uniformity. In this research, WLEDs with two correlated color temperatures (CCT) of 6600K and 7700K were applied. The obtained results showed that triple-layer phosphor configuration is more outstanding in CRI, CQS, and LE. Moreover, the color deviation has been significantly reduced, which means the color uniformity has been enhanced with the application of triple-layer phosphor configuration. These results can be proven by scattering properties of phosphor layers based on Mie theory. Thus, the researched results have become a reliable and valuable reference for manufacturing higher-quality WLEDs.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13094
      Issue No: Vol. 17, No. 6 (2019)
       
  • Arithmetic Progression Approach for Image Denoising

    • Authors: bilal charmouti, Ahmad Kadri Junoh, Mohd Yusoff Mashor, Najah Ghazali, Mahyun Ab Wahab, Wan Zuki Azman Wan Muhammad, Abdesselam Beroual
      First page: 2948
      Abstract: Removing noise from the image by retaining the details and features of this treated image remains a standing challenge for the researchers in this field. Therefore, this study is carried out to propose and implement a new denoising technique for removing impulse noise from the digital image, using a new way. This technique permits the narrowing of the gap between the original and the restored images, visually and quantitatively by adopting the mathematical concept ''arithmetic progression''. Through this paper, this concept is integrated into the image denoising, due to its ability in modelling the variation of pixels’ intensity in the image. The principle of the proposed denoising technique relies on the precision, where it keeps the uncorrupted pixels by using effective noise detection and converts the corrupted pixels by replacing them with other closest pixels from the original image at lower cost and with more simplicity.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12408
      Issue No: Vol. 17, No. 6 (2019)
       
  • An Overview of the Fundamental Approaches That Yield Several Image
           Denoising Techniques

    • Authors: bilal charmouti, Ahmad Kadri Junoh, Mohd Yusoff Mashor, Najah Ghazali, Mahyun Ab Wahab, Wan Zuki Azman Wan Muhammad, Abdesselam Beroual
      First page: 2959
      Abstract: Digital image is considered as a powerful tool to carry and transmit information between people. Thus, it attracts the attention of large number of researchers, among them those interested in preserving the image features from any factors that may reduce the image quality. One of these factors is the noise which affects the visual aspect of the image and makes others image processing more difficult. Thus far, solving this noise problem remains a challenge for the researchers in this field.  A lot of image denoising techniques have been introduced in order to remove the noise by taking care of the image features ; in other words, getting the best similarity to the original image from the noisy one. However, the findings are still inconclusive. Beside the enormous amount of researches and studies which adopt several mathematical concepts (statistics, probabilities, modeling, PDEs, wavelet, fuzzy logic, etc.), there is also the scarcity of review papers which carry an important role in the development and progress of research. Thus, this review paper intorduce an overview of the different fundamental approaches that yield the several image-denoising techniques, presented with a new classification. Furthermore, the paper present the different evaluation tools needed on the comparison between these techniques. In order to facilitate the processing of this noise problem, among a great diversity of techniques and concepts.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.11301
      Issue No: Vol. 17, No. 6 (2019)
       
  • Evaluation of the Quality of an Image Encryption Scheme

    • Authors: Osemwegie Omoruyi, Chinonso Okereke, Kennedy Okokpujie, Etinosa Noma-Osaghae, Samuel John, Obinna Okoyeigbo
      First page: 2968
      Abstract: Encryption systems have been developed for image viewing applications using the Hill Cipher algorithm. This study aims to evaluate the image encryption quality of the Hill Cipher algorithm. Several traditional metrics are used to evaluate the quality of the encryption scheme. Three of such metrics have been selected for this study. These include the Colour Histogram, the Maximum Deviation (comparing the original image) and the Entropy Analysis of the encrypted image. Encryption quality results from all three schemes using a variety of images show that a plain Hill Cipher approach gives a good result for all kinds of images but is more suited for colour dense images.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.10488
      Issue No: Vol. 17, No. 6 (2019)
       
  • Recognition system for facial expression by processing images with deep
           learning neural network

    • Authors: Holman Montiel Ariza, Henry Hernández Martínez, Luz Andrea Gaviria Roa
      First page: 2975
      Abstract: The recognition systems of patterns in images are mechanisms that filter the information that provides an image to highlight the area of interest for the user. Usually, these mechanisms are based on mathematical transformations that allow the processor to perform interpretations based on the geometry or shape of the image. However, the strategies that implement mathematical transformations are limited, since the effectiveness of these techniques is reduced by changing the morphology or resolution of the image. This paper presents a partial solution to this limitation with a digital image processing technique based on a deep learning neural network (DNN). This technique incorporates a mechanism that allows the DNN to determine the facial expression of a person, based on the segmented information of the image of their face. By segmenting the image and processing its characteristics in parallel, the proposed technique increases the effectiveness of recognizing facial gestures in different images even when modifying their characteristics.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12948
      Issue No: Vol. 17, No. 6 (2019)
       
  • PAPR Analysis of OFDM System Using AI based multiple signal representation
           methods

    • Authors: alok joshi, jyoti shukla, rajesh tyagi
      First page: 2983
      Abstract: OFDM (orthogonal frequency division multiplexing) is widely used in 4th generation applications owing to its robustness in fading environments.  The major drawback of OFDM systems is the high PAPR (peak-to-average power ratio) of the transmitted signals, it leads to in and out of band distortion. SLM (selective mapping) and PTS (partial transmit sequence) are two key methods for PAPR reduction .Both the methods require exhaustive searching of phase factors to optimize the PAPR, these searches leads to high computational complexity. This paper describes the PAPR reduction and some of the important optimization techniques which can be used with PTS for the reduction of computational complexity and search space. In this paper we have analyzed PTS and SLM with particle swarm optimization (PSO), Artificial Bee Colony (ABC) and differential evolution (DE). PAPR and BER (bit error rate) comparison is done for both the cases.
      PubDate: 2019-11-01
      DOI: 10.12928/telkomnika.v17i6.11511
      Issue No: Vol. 17, No. 6 (2019)
       
  • Embedded System for Upper-Limb Exoskeleton Based on Electromyography
           Control

    • Authors: Triwiyanto Triwiyanto, I Putu Alit Pawana, Bambang Guruh Irianto, Tri Bowo Indrato, I Dewa Gede Hari Wisana
      First page: 2992
      Abstract: A major problem in an exoskeleton based on electromyography (EMG) control with pattern recognition-based is the need for more time to train and to calibrate the system in order able to adapt for different subjects and variable. Unfortunately, the implementation of the joint prediction on embedded system for the exoskeleton based on the EMG control with non-pattern recognition-based is very rare. Therefore, this study presents an implementation of elbow-joint angle prediction on an embedded system to control an upper limb exoskeleton based on EMG signal. The architecture of the system consisted of a bio-amplifier, an embedded ARMSTM32F429 microcontroller, and an exoskeleton unit driven by a servo motor. The elbow joint angle was predicted based on EMG signal that is generated from biceps. The predicted angle was obtained by extracting the EMG signal using a zero crossing feature and filtering the EMG feature using a Butterworth low pass filter. This study found that the range of root mean square error and correlation coefficients are 8° - 16° and 0.94 - 0.99, respectively which suggest that the predicted angle is close to the desired angle and there is a high relationship between the predicted angle and the desired angle.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.11670
      Issue No: Vol. 17, No. 6 (2019)
       
  • Transformation and Dynamic Visualization of Images from Computer through
           an FPGA in a Matrix of Led

    • Authors: Edwar Jacinto
      First page: 3003
      Abstract: This article shows the implementation of a system that uses a graphic interface to load a digital image into a programmable logic device, which is stored in its internal RAM memory and is responsible for visualizing it in a matrix of RGB LEDs, so that This way, the LEDs show an equivalent to the image that was sent from the PC, conserving an aspect ratio and respecting as much as possible the color of the original image. To carry out this task, a Matlab script was designed to load the image, convert and format the data, which are transmitted to the FPGA using the RS232 protocol. The FPGA is in charge of receiving them, storing them and generating all the signals of control and synchronization of the system including the control of the PWM signals necessary to conserve the brightness of each one of the LEDs. This system allows the visualization of static images in standard formats and, in addition, thanks to the flexibility of the hardware used, it allows the visualization of moving images type GIF.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12710
      Issue No: Vol. 17, No. 6 (2019)
       
  • Batik image retrieval using convolutional neural network

    • Authors: Heri Prasetyo, Berton Arie Putra Akardihas
      First page: 3010
      Abstract: This paper presents a simple technique for performing Batik image retrieval using the Convolutional Neural Network (CNN) approach. Two CNN models, i.e. supervised and unsupervised learning approach, are considered to perform end-to-end feature extraction in order to describe the content of Batik image. The distance metrics measure the similarity between the query and target images in database based on the feature generated from CNN architecture. As reported in the experimental section, the proposed supervised CNN model achieves better performance compared to unsupervised CNN in the Batik image retrieval system. In addition, image feature composed from the proposed CNN model yields better performance compared to that of the handcrafted feature descriptor. Yet, it demonstrates the superiority performance of deep learning-based approach in the Batik image retrieval system.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12701
      Issue No: Vol. 17, No. 6 (2019)
       
  • A Fuzzy Micro-climate Controller for Small Indoor Aeroponics Systems

    • Authors: Bambang Dwi Argo, Yusuf Hendrawan, Ubaidillah Ubaidillah
      First page: 3019
      Abstract: The Indonesian agricultural sector faces challenges producing affordably priced food using sustainable practices. A soilless cultural practice, such as indoor aeroponics, is a compelling alternative to conventional agriculture. The objective of the present study was to develop a system for micro-climate management in a pilot-scale indoor aeroponics system. For this purpose, three fuzzy logic controllers were developed and evaluated to maintain plant chamber parameters (temperature, relative humidity, and light intensity) at desired set points controlled by embedded system controls designed using BASCOM-AVR software. The results showed that the fuzzy controllers provided excellent responses and experienced relatively low errors in all controlled parameters. All parameters changes followed the set point very smoothly and responded accordingly.The averaged percent of working times in which temperature, relative humidity, and light intensity were maintained within less than ±1°C, ±5%, and ±30 lux from the set points were found to be 88.43%, 95.91%, and 85.51%, respectively.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12214
      Issue No: Vol. 17, No. 6 (2019)
       
  • Hierarchical Robust Fuzzy Sliding Mode Control for a Class of SIMO
           Under-Actuated Systems with mismatched uncertainties

    • Authors: Ha Duc Vu
      First page: 3027
      Abstract: The development of the algorithms for single input multi output (SIMO) under-actuated systems with mismatched uncertainties is important. Hierarchical sliding-mode controller (HSMC) has been successfully employed to control SIMO under-actuated systems with mismatched uncertainties in a hierarchical manner with the use of sliding mode control. However, in such a control scheme, chattering phenomenon is its main disadvantage. In this paper, by using the hierarchical sliding control approach, a sliding control law is derived so as to make every subsystem stabilized at the same time. However, the controller making chattering phenomenon around sliding surface. Therefore a proposed solution will combine the sliding mode controller with fuzzy control rules for elimination of the chattering phenomenon and fuzzy control rules is used to replace the sign function of the sliding control law. The results are verified through theoretical proof and simulation software of MATLAB through two systems Pendubot and series double inverted pendulum.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13176
      Issue No: Vol. 17, No. 6 (2019)
       
  • Regional Distribution of Football Clubs in English Top Flight League

    • Authors: Hilary I Okagbue
      First page: 3044
      Abstract:  English football leagues and local competitions are highly followed worldwide. Clubs compete for titles and honors on a yearly basis. English clubs are located in 10 regions of England and Wales. The detailed representation of the clubs according to the regions is rarely discussed. Analysis is often restricted to club by club performances. This article presents the data analysis of regional distribution of football clubs in the English top flight or top division or top level from inception to the premier league era. Generally, there is a significant uneven distribution of club across the regions. The North West and West Midlands regions have been represented by clubs since the inception to date. Data analysis revealed that the early days of the English top-level league were dominated by clubs from North West and London, whereas the regions of the East of England, South West and Wales are least represented in the top league. Also, there seems to be a 'Southern shift' in recent years with increased representation of clubs from Southern England. However, some balance is now maintained given that all ten regions have been represented by at least one club over the last three seasons; 2016/17 to 2018/19.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12292
      Issue No: Vol. 17, No. 6 (2019)
       
  • Regression Model Focused On Query For Multi Documents Summarization Based
           On Significance Of The Sentence Position

    • Authors: Aris Fanani, Putra Prima Arhandi, M Mahaputra Hidayat, Yuniar Farida, Abdul Muhid, Billy Montolalu
      First page: 3050
      Abstract: Document summarization is needed to get the information effectively and efficiently. One method used to obtain the document summarization by applying machine learning techniques. This paper proposes the application of regression models to query-focused multi-document summarization based on the significance of the sentence position. The method used is the Support Vector Regression (SVR) which estimates the weight of the sentence on a set of documents to be made as a summary based on sentence feature which has been defined previously. A series of evaluations performed on a data set of DUC 2005. From the test results obtained summary which has an average precision and recall values of 0.0580 and 0.0590 for measurements using ROUGE-2, ROUGE 0.0997 and 0.1019 for measurements using the proposed regression-SU4. Model can perform measurements of the significance of the position of the sentence in the document well.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12494
      Issue No: Vol. 17, No. 6 (2019)
       
  • Protecting Big Data Mining Association Rules using Fuzzy System

    • Authors: Gandikota Ramu, Appawala Jayanthi
      First page: 3057
      Abstract: Recently, Big data is granted to be the solution to opening the subsequent large fluctuations of increase in fertility. One of the significant problems is data security.  While people use data mining methods to identify valuable information following massive database, people further hold the necessary to maintain any knowledge so while not to be worked out, like delicate common itemsets, practices, taxonomy tree and the like Association rule mining can make a possible warning approaching the secrecy of information. So, association rule hiding methods are applied to evade the hazard of delicate information misuse. Various kinds of investigation already prepared on association rule protecting. However, maximum of them concentrate on introducing methods with a limited view outcome for inactive databases (with only existing information), while presently the researchers facing the problem with continuous information. This paper proposes the framework is achieving the data anonymization by using fuzzy logic by supporting big data mining. The fuzzy logic grouping the sensitivity of the association rules with a suitable association level. Moreover, parallelization methods which are inserted in the present framework will support fast data mining process.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.10064
      Issue No: Vol. 17, No. 6 (2019)
       
  • A Design of Radial Line Slot Array Antennas (RLSA) Using the Specification
           of Panel Antennas

    • Authors: Teddy Purnamirza
      First page: 3066
      Abstract: RLSA antennas were suggested by several researches as Wi-Fi antennas in addition to panel antennas. Therefore, this paper researched the possibility of this suggestion. We used the size of an available in market 16 dBi panel antenna (225 mm2) as the size for our developed RLSA antenna. Based on this size, we developed 60 RLSA models using extreme beamsquint technique and simulated them.  We then chose a best model with a best performance. The best model was then fabricated and measured. The simulation and measurement results show that the developed RLSA antenna has better performance compared to the 16 dBi panel antenna in term of gain (0.25 dB higher) and bandwidth (570 MHz wider). The RLSA antenna also tested as antenna for a Wi-Fi device and it showed good performance
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12679
      Issue No: Vol. 17, No. 6 (2019)
       
  • Development of computer vision and artificial neural network for purity,
           total phenol, and pH detection of luwak (Civet) coffee green bean

    • Authors: Yusuf Hendrawan, Shinta Widyaningtyas, Sucipto Sucipto
      First page: 3073
      Abstract: Luwak (civet) coffee is a quality coffee product, famous for being expensive and popular worldwide. The conventional method for detecting total phenol, pH, and purity percentage in Luwak coffee green bean products previously applies such a destructive and expensive chemical analysis, which requires complex sample preparation, and long analysis times. Computer vision as a non-invasive bio-sensing method provides opportunity to detect purity, total phenol, and pH in Luwak coffee green bean. This study aims to obtain the best Artificial Neural Network (ANN) model to detect the percentage of purity, total phenol, and pH on Luwak coffee green bean by using: input color features (red-green-blue (RGB), gray, hue-saturation-value (HSV), hue-saturation-lightness (HSL), L*a*b*, and Haralick textural feature with color co-occurrence matrix (CCM) including entropy, energy, contrast, homogeneity, sum mean, variance, correlation, maximum probability, inverse difference moment, and cluster tendency. The results of this study show that the Red(RGB) sum means, Value(HSV) sum mean, Saturation(HSL) sum mean and Blue variance are inversely proportional to the percentage of Luwak coffee purity, while Hue variance is directly proportional to the percentage of Luwak coffee purity. The best ANN structure is (5 inputs; 30 nodes in hidden layer 1; 40 nodes in hidden layer 2; and 3 outputs) which have training mean square error (MSE) of 0.0085 and validation MSE of 0.0442. The combination of color features, textures and ANN models has the potential as bio-instrumentation to detect total phenol, pH, and Luwak coffee green bean purity in an effective and accurate way.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12689
      Issue No: Vol. 17, No. 6 (2019)
       
  • AN ADAPTIVE CLUSTERING AND CLASSIFICATION ALGORITHM FOR TWITTER DATA
           STREAMING IN APACHE SPARK

    • Authors: mostafa a mohammed
      First page: 3086
      Abstract: On-going big data from social networks sites alike Twitter or Facebook has been an entrancing hotspot for investigation by researchers in current decades as a result of various aspects including up-to-date-ness, accessibility and popularity; however anyway there may be a trade off in accuracy. Moreover, clustering of twitter data has caught the attention of researchers. There is a need for an algorithm that is able to cluster the data in a lesser amount of time, in case of data stream. The presented adaptive clustering and classification algorithm is used for data streaming in Apache spark to overcome the existing problems is processed in two phases. In the first phase, the input pre-processed twitter data is viably clustered utilizing an Improved Fuzzy C-means clustering and the proposed clustering is additionally improved by an Adaptive Particle swarm optimization (PSO) algorithm. Further the clustered data streaming is assessed utilizing spark engine. In the second phase, the input pre-processed Higgs data is classified utilizing the modified support vector machine (MSVM) classifier with grid search optimization. At long last the optimized information is assessed in spark engine and the assessed esteem is utilized to discover an accomplished confusion matrix. The proposed work is utilizing Twitter dataset and Higgs dataset for the data streaming in Apache Spark. The computational examinations exhibits the superiority of presented approach comparing with the existing methods in terms of precision, recall, F-score, convergence, ROC curve and accuracy.  
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.11711
      Issue No: Vol. 17, No. 6 (2019)
       
  • A Novel Model for Solar Radiation Prediction

    • Authors: Ibrahim Sani Madugu, F. Abdulkadir, A. Abdulkarim, J. U. Inaku, Y. A. Adediran, B. J. Olufeagba, A. U. Lawan
      First page: 3100
      Abstract: Energy for fulfilling basic community/individual needs has come to constitute the first article of expectation in all contemporary societies. The exploitation of renewables notably solar in electricity generation has brought relief to the fulfilment of energy demand especially among susceptible communities. In this paper yearly minimum solar radiation of Kano (12.05°N; 08.2°E; altitude 472.5 m; 3 air density 1.1705 kg/m3) for 46 years is used to generate a prediction model that fits the data using autoregressive moving average (ARMA) and a new model termed autoregressive moving average process (ARMAP). Comparison between the ARMA and ARMAP models showed a tremendous improve in the sum of square error reduction between the actual data and the forecasted by 6.60x1017% 
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12729
      Issue No: Vol. 17, No. 6 (2019)
       
  • Regenerating Face Images from Multi-spectral Palm Images Using Multiple
           Fusion Methods

    • Authors: Raid Rafi Al-Nima, Moatasem Yaseen Al-Ridha, Farqad Hamid Abdulraheem
      First page: 3110
      Abstract: This paper established a relationship between multi-spectral palm images and a face image based on multiple fusion methods. The first fusion method to be considered is a feature extraction between different multi-spectral palm images, where multi-spectral CASIA database was used. The second fusion method to be considered is a score fusion between two parts of an output face image. Our method suggests that both right and left hands are used, and that each hand aims to produce a significant part of a face image by using an MLP network. This will lead to the second fusion part to reconstruct the full face image, in order to examine its appearance. This topology provided interesting results, according to a comparison applied to other research
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12857
      Issue No: Vol. 17, No. 6 (2019)
       
  • Streaming in-patient BPM data to the cloud with a real-time monitoring
           system

    • Authors: Mohammed Ghanim Ayoub, Mazin N. Farhan, Mohamme S. Jarjees
      First page: 3120
      Abstract:  Monitoring the heart activities for old people or people with medical history (Arrhythmia or CHD) is targeted by most new medical technologies. This paper demonstrated an in-patient real-time monitoring system for heart rate estimation. A ratio of beats per minute (BPM) is continuously recorded and streamed to the cloud via WeMos WiFi development board. This cost effective system is simply based on two sub-systems: BPM data acquisition through pulse sensor and WeMos-based communication systems. The streamed BPM data are saved instantaneously in Google drive as spreadsheets which can only be accessed by authorized persons wherever the internet service is available. Thus, the person in charge can remotely observe the patient’s status. A pilot study with eight subjects was carried out to validate the developed BPM tele-monitoring system. Encouraging results have been achieved.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13263
      Issue No: Vol. 17, No. 6 (2019)
       
  • Implementation Smart Home using Internet of Things (IoT)

    • Authors: Afrizal Mayub, Fahmizal Fahmizal, Ma’ruf Shidiq, Unan Yusmaniar Oktiawati, Nur Rohman Rosyid
      First page: 3126
      Abstract:  Development in technology of information today provides various facilities to support human activity. One technology that facilitates human is the use of automated systems, the application of smart home system makes it easier for users to control household electronic devices. This study addresses one of the smart home solutions with automation systems. The system is built using ESP8266 and Raspberry Pi devices, by utilizing MQTT, REST and Laravel framework protocols. With Arduino, Python and PHP programming, household devices can be controlled both automatically and manually. Control system can be done by using web, chatbot, and physically. The communication used utilizes wireless network. With the designed system, the users can control the device, gain information and get warning. The information provided by the system is obtained from open data on the internet and from the sensor installed on the device.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.11722
      Issue No: Vol. 17, No. 6 (2019)
       
  • Architecture of an Efficient Dual Band 1.8/2.5 GHz Rectenna for RF Energy
           Harvesting

    • Authors: Jahariah Sampe
      First page: 3137
      Abstract: This paper presents a highly efficient rectenna of RF energy harvesting systems operating at 1.8 and 2.5 GHz bands for battery-less sensor application. The antenna is designed by CST-MWS. The Schottky diode used for rectifying circuit is HSMS 286B in which designed by Agilent ADS. The key finding of the paper is that the simulated DC output voltage of the rectenna is 1.35 V for low input power of -25 dBm at high resistance load of 1M Ω. Correspondingly, the RF-DC conversion efficiency of the rectification process is 59.51% and 45.75% at 1.8 GHz and 2.5 GHz, respectively which are high efficiency and much better compared to literature. The rectenna is capable to produce 1.8 V from an input power of -20 dBm. Thus, the proposed RF energy harvesting system offers a promising solution designed for efficient functionality at a low power level of RF energy in the dual band.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12314
      Issue No: Vol. 17, No. 6 (2019)
       
  • A Web/Mobile Decision Support System to Improve Medical Diagnosis Using a
           Combination of K-Mean Clustering and Fuzzy Logic

    • Authors: Zainab Talib Drweesh, Abbass Al-Bakry
      First page: 3145
      Abstract:  This research provides a system that integrates the work of data mining and expert system for different tasks in the process of medical diagnosis, and provides detailed steps to the process of reaching a diagnosis based on the described symptoms and mapping them with existing diagnosis available on the web or on a cloud of medical knowledge based, aggregate these data in a fuzzy manner and produce a satisfactory diagnosis of the persisting problem. The mobile phone interface would make the system user-friendly and provides mobility and accessibility to the user, while posting updates and reading in details the steps that led to the decision or diagnosis that is reached by the K-mean and the fuzzy logic inference engine.The achieved results indicate a promising diagnosis performance of the system as it achieved 90% accuracy and 92.9% F-Score.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12715
      Issue No: Vol. 17, No. 6 (2019)
       
  • Classifying Confidential Data using SVM for Efficient Cloud Query
           Processing

    • Authors: Huda Kadhim Tayyeh, Ahmed Sabah Al-Jumaili
      First page: 3155
      Abstract: Nowadays, organizations are widely using a cloud database engine from the cloud service providers. Privacy still is the main concern for these organizations in which every organization is strictly looking forward more secure and private environment for their own data. For this purpose, several studies have proposed different types of encryption methods in order to protect the data over the cloud. However, the daily transactions represented by queries for such databases makes the encryption is inefficient solution. Therefore, recent studies have presented a mechanism for classifying the data prior to migrate into the cloud. This would reduce the need of encryption which enhance the efficiency. Yet, most of the classification methods used in the literature were based on string-based matching approach. Such approach suffers of the exact match of terms where the partial matching would not be considered. This paper aims to take the advantage of N-gram representation along with Support Vector Machine classification. A real-time data will used in the experiment. In addition, the N-gram approach will be used to represent the data. After conducting the classification, the Advanced Encryption Standard algorithm will be used to encrypt the confidential data. Results showed that the proposed method has outperformed the baseline encryption method. This emphasizes the usefulness of using the machine learning techniques for the process of classifying the data based on confidentiality.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13059
      Issue No: Vol. 17, No. 6 (2019)
       
  • Evolution of Millimeter-Wave Communications toward next Generation in
           Wireless Technologies

    • Authors: Aws Zuheer Yonis
      First page: 3161
      Abstract: Next generation in wireless communication systems being deployed in the world, 5G/6G mobile and wireless communication technologies have been widely studied. This work clarifies that Millimeter-Wave (mmWave) is in its infancy and will be driven by consumers who continue to desire higher data rates for the consumption of media. Millimeter-Wave technology stands for next-generation mobile technology and includes all types of advanced features which make next technology most dominant technology in near future, these capabilities include very high achievable data rates in addition to lower delays and constant connectivity on wireless devices.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13060
      Issue No: Vol. 17, No. 6 (2019)
       
  • A review on software defined network security risks and challenges

    • Authors: Tsehay Admassu Assegie
      First page: 3168
      Abstract:  Software defined network is an emerging networking architecture that separates the traditional integrated control logic and data forwarding functionality into different planes, namely the control plane and data forwarding plane. The data plane does and end to end data delivery. And the control plane does the actual network traffic forwarding and routing between different network segments. In software defined network the networking infrastructure layer where the entire networking device, such as switches and routers reside is connected with the separate controller layer with the help of standard called OpenFlow protocol. It is a standard protocol that allows different vendor devices like juniper switches, cisco switches and huawei switches to be connected to the controller. The centralization of the SDN controller made the network more flexible, manageable and dynamic, such as provisioning of bandwidth, dynamic scale out and scale in compared to the traditional communication network, however the centralized SDN controller is more vulnerable to security risk factors such as DDOS and flow rule poisoning attack. In this paper we will explore the architectures and principles of software defined network and security risks with the centralized SDN controller and possible ways to mitigate these risks.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13119
      Issue No: Vol. 17, No. 6 (2019)
       
  • Interface Protocol Design: A Communication Guide for FANET

    • Authors: Bashir olaniyi sadiq
      First page: 3175
      Abstract: The present and the future routing protocols in relation to the high throughput requirement, adaptivity to fast-changing link topology and speed makes the choice of routing protocol for unmanned aerial vehicle communication important. Due to this fact, an efficient routing protocol is highly dependent on the nature of the communication link. A flexible solution that presents these features is the use of light fidelity as a communication medium. Therefore, this paper presents the design of an interface protocol for indoor Flying Ad-hoc Network specific routing protocol using light fidelity as a communication link. The interface protocol governs communication when UAV move in a swarm. The architecture, the state machine model is discussed in this paper. Results of the design are validated via simulation using the NS3 in terms of packet delivery ratio and throughput.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13296
      Issue No: Vol. 17, No. 6 (2019)
       
  • Filtration and Water Reduction of Methyl Ester for Insulation Purpose

    • Authors: Abdul Rajab, Fernanda Eko Putra, M. Imran Hamid, Melda Latief, Novison Novison, Kiasatina Azmi, M. Firdaus Akbar J. K., M. Kamarol M. Jamil
      First page: 3183
      Abstract: An attempt to develop a monoester type insulating oil, especially methyl ester is being conducted and the current results after conducting two kinds of treatment, namely, filtration and water reduction are reported in this paper. Five different samples were prepared from methyl ester oil based on their melting point. The important properties of oil samples such as breakdown voltage, viscosity, water content, acidity, and density were tested, and are evaluated based on the standard specification of natural ester used for the transformer, ASTM D-6871. Another important property, i.e. oxidation stability was also tested and is evaluated by comparing the corresponding result of mineral oil. It is found that the breakdown voltage, the viscosity and the relative density of the oil fulfill the requirements specified by the standard, whereas other properties like water content, acidity and oxidation stability need further improvement
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13133
      Issue No: Vol. 17, No. 6 (2019)
       
  • Classification of Web services Using Data Mining Algorithms and Improving
           Performance

    • Authors: Swami Das More, A Govardhan, D Vijaya Lakshmi
      First page: 3191
      Abstract: As per the global digital report, 52.9% of the world population is using the internet and 42% of the world population are active users using e-commerce, banking and other online applications. Web services are software  components accessed by using networked communications and provide services to end users. The designer provides a high quality of web service. To meet the demands of user requirements, it is necessary for the designer to ensure quality architecture, quality of services. In order to meet the demands of user measure service quality by the ranking of web services, in this paper, we have analyzed QWS dataset and found that the important parameters are best practices, Successability, availability, response time, reliability,  throughput and compliance. We have used various data mining techniques and conducted experiments to classify QWS data set into four categorical values as class-1,2,3 and 4. The results are compared with various techniques like Random Forest, Artificial Neural Network, J48 Decision tree, extreme Gradient Boosting, K Nearest neighbour and Support Vector Machine. Multiple classifiers are analyzed and it is observed that classifier technique eXtreme Gradient Boosting got the maximum accuracy of 98.44% and Random Forest got the accuracy of 98.13%. In future, the present work can be extended to the Quality of web service for mixed attributes.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.11510
      Issue No: Vol. 17, No. 6 (2019)
       
  • Design and realization of motion detector system for house security

    • Authors: Zainab G. Faisal, Maysam Sameer Hussein, Amany Mohammad Abood
      First page: 3211
      Abstract: In this paper, the design and realization of motion detector system for house security based GSM network is presents. The development of microcontroller carried out intruder detection that supports tracking techniques to provide vital security with control and alert operation inside and outside the home. The pivot of security on the integration the motion detector and cameras into web applications has become more interested. The smart surveillance Pi camera obtain the input from the motion detector and controller which is send the video to the web server allowing the homeowner to access this video by use web applications.  An intrusion alert send to the owner by mean of message via mobile and buzzers alarms located at suitable distance. This system is typify proficient video camera for remote sensing and tracking with live video for succeeding play again to offers efficient and easy implementation with omnipresent surveillance solution.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13142
      Issue No: Vol. 17, No. 6 (2019)
       
  • Automatic Image Slice Marking Propagation on Segmentation of Dental CBCT

    • Authors: Agus Zainal Arifin, Evan Tanuwijaya, Baskoro Nugroho, Arif Mudi Priyatno, Rarasmaya Indraswari, Eha Renwi Astuti, Dini Adni Navastara
      First page: 3218
      Abstract: Cone Beam Computed Tomography (CBCT) is a radiographic technique that has been commonly used to help doctors provide more detailed information for further examination. CBCT tooth segmentation has many challenges such as low contrast, boundaries of blurred teeth and irregular contours of the teeth. In addition, because the CBCT results produce a lot of slices, where each slice has information that is related and the topology of each slice can differ from one another, so the marking on each slice becomes exhaustive and inefficient, due to information similarities on each slice. In this study, we propose an automatic image slice marking propagation on segmentation of dental CBCT. Marker from the result of the first slice segmentation will be use as the information for the next slices propagately. This study was successful in segmenting using the proposed marking method with an error value of Misclassification Error (ME) and Relative Foreground Area Error (RAE) of 0.112 and 0.478, respectively.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13220
      Issue No: Vol. 17, No. 6 (2019)
       
  • Mitigation of High Voltage Induction Effect on ICCP System of Gas
           Pipelines: A field case study

    • Authors: Rohana Ismail, Arnawan Hasibuan, Faizar Abdurrahman, Nurul Islami
      First page: 3226
      Abstract: An analysis of the high voltage induction effect on the Impressed current cathodic protection (ICCP) system on pipelines parallel toward high voltage power lines was employed in this research. Mitigation of high voltage effect throught human and environment is necessary to implemented.  Direct current induction was used to increase the electrical potential of the gas pipeline, from Klumpang to sicanang area, Indonesia. During the mitigation process, the highest induction value was obtained 0.00574 KV which is previously was 0.01732 KV, and occurred at the limit of the allowable secure touch tension value of 0.015 KV. The data that acquire from the measurement of test point of ICCP underneath the transmission line reveal a comparison data between field measurements occurred of mitigation process. The direct current induction method is found to be safe for ICCP system and environment.
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.12493
      Issue No: Vol. 17, No. 6 (2019)
       
  • Photovoltaic Integrated Unified Power Quality conditioner with a 27-level
           Inverter

    • Authors: kamel saleh, Nael Hantouli
      First page: 3232
      Abstract:  This paper presents a Unified Power Quality Conditioner (UPQC) with a 27- level inverter based on an asymmetric H-bridge topology. Each phase of the inverter is composed of three H-bridges, supplied by three DC sources scaled in the power of three. The output of the multilevel inverter is connected directly to the point of common coupling (PCC) without the need to a transformer or a filter. The calculation of the Shunt Active Power filter (SAPF) compensation current is based on the generalized theory of synchronous frame (d-q theory) while the calculation of a series active filter voltage is based on Instantaneous Reactive Power (p-q theory). The control of the SAPF is achieved by using a closed loop vector control followed by a new multilevel modulation technique. In addition to the capability of harmonic elimination of both current and voltage drawn from the source, the UPQC can produce real and reactive power to feed the loads during prolonged voltage outages or source shortage.  The injection of real and reactive power depends on the state of charge (SOC) of batteries, the frequency of the system, real and reactive power of the load, and power factor at the point of PCC. The proposed UPQC strategy is simulated in MATLAB SIMULINK and the results has shown a significant improved in Total Harmonics Distortion (THD) of both the voltage and currents.  
      PubDate: 2019-12-01
      DOI: 10.12928/telkomnika.v17i6.13224
      Issue No: Vol. 17, No. 6 (2019)
       
 
 
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