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27,762 Article Results

Asymmetrical Nine-Level Inverter Topology with Reduce Power Semicondutor Devices

10.12928/telkomnika.v16i1.8520
M. S.; Universiti Teknologi Malaysia Arif , S.M.; Universiti Teknologi Malaysia Ayob , Z.; Universiti Teknologi Malaysia Salam
In this paper a new single-phase multilevel inverter topology is presented. Proposed topology is capable of producing nine-level output voltage with reduce device counts. It can be achieved by arranging available switches and dc sources in a fashion such that the maximum combination of addition and subtraction of the input dc sources can be obtained. To verify the viability of the proposed topology, the circuit model is developed and simulated in Matlab-Simulink software. Experimental testing results of the proposed nine-level inverter topology, developed in the laboratory, are presented. A low frequency switching strategy is employed in this work. The results show that the proposed topology is capable to produce a nine-level output voltage, capable in handling inductive load and yields acceptable harmonic distortion content
Volume: 16
Issue: 1
Page: 38-45
Publish at: 2018-02-01

Gaze Tracking Algorithm Using Night Vision Camera

10.11591/ijeecs.v9.i2.pp438-446
T.A. Izzuddin , M.H. Jali , A.R. Abdullah , R. Sudirman
Nowadays, the advancement of medical technology has given birth into many innovative machines and devices to improve our health life, especially to those who are disabled or gifted.   On some people with severe disabilities such as quadriplegia, the human eye-ball does not only serve as a vision system, but also a means of conveying information and intention to other people. This is because although quadriplegic patients suffer the loss of motor sensory functions from the neck and below, upper neck functions such as the vision system is normally spared. This enables the patient to control the movement of his/her eyeballs to convey desired information. Although many similar researches have been done, this paper proposes the use of image processing on image captured using webcam with its Infra-Red (IR) filter removed (a.k.a night vision) to achieve robustness. This allows the algorithm to properly track the location of the iris despite of its and the pupil color variations. Two image processing algorithms are then used, each with owns tradeoff between speed and accuracy.  Analysis on both algorithms shows good tracking performance despite of the mentioned tradeoff.
Volume: 9
Issue: 2
Page: 438-446
Publish at: 2018-02-01

A Numerical Modeling for Study Marine Current in the Manado Bay, North Sulawesi

10.12928/telkomnika.v16i1.5919
Parabelem Tinno; Universitas Negeri Manado Rompas Dolf , Jenly Dyliep; Universitas Negeri Manado Manongko Isria
This study is investigating about marine currents provided electrical energy through the numerical model. The objective of this study is to know the power available distributions in the Manado Bay, North Sulawesi, Indonesia. The Manado Bay was width 2200 m with 79 m of depth. In computation, we are made grids in x and y horizontal were 7 m respectively, also for z vertical of four layers. The results shown that the power available distributions in the Manado Bay at 0.1 Sv were 0.00-20.00 kW/m2 when low tide currents and when high tide currents were 0.00-105 kW/m2. The values will enable for marine currents power plant in the Manado Bay to future.
Volume: 16
Issue: 1
Page: 18-24
Publish at: 2018-02-01

Similarities of Antimalarial Resistance Genes in Plasmodium Falciparum Based on Ontology

10.12928/telkomnika.v16i1.6898
Dinar Munggaran; Universitas Pakuan Akhmad , Yeni; Bogor Agricultural University Herdiyeni , Etih; Bogor Agricultural University Sudarnika
The finding of P. falciparum chloroquine resistance (pfcrt) and P. falciparum multidrug resistance 1(pfmdr1) gene in P. falciparum has become an obstacle in treating malaria. The polymorphism between the two genes may result in molecular functions, in cellular components, or in biological processes. The objective of this research is to find similarities between the two genes in 3 components; cellular components, molecular functions and biological processes, based on Gene Ontology. the similarity will be counted semantically by path length approach with Wang method. The range of similarity values is 0-1. After the similarity value examined; in Molecular Function the similarity is 1 due to the same drug transmembrane transporter activity, in Cellular Component is 0,714, the similarity only at the same vacuole food cells, and in Biological Processes is 1 due to the same proces in responding to drug. Therefore, this research proves both genes have similarities based on gene ontology.
Volume: 16
Issue: 1
Page: 415-423
Publish at: 2018-02-01

Simulation and Hardware Implementation of Shunt Active Power Filter Based on Synchronous Reference Frame Theory

10.12928/telkomnika.v16i1.6524
Karthikrjan; VIT University Senthilnathan , Iyswarya; VIT University Annapoorani , S.; Botswana International University of Science and Technology Ravi
This paper describes about the Shunt Active Power Filter (SAPF) for the elimination of the current harmonics in the line side. The Active Power Filter is based on the Voltage Source Inverter (VSI) topology. The Synchronous Reference Frame (SRF) theory based control strategy is utilized for SAPF. The SAPF has the better performance for compensation of harmonics. The simulation of shunt active power filter is performed in MATLAB/Simulink. The SAPF is implemented in hardware protptype with ATMEGA 8 Microcontroller. The Simulation and Hardware result shows that the current harmonics are eliminated in the system.
Volume: 16
Issue: 1
Page: 1-9
Publish at: 2018-02-01

Helmet Deduction Using Image Processing

10.11591/ijeecs.v9.i2.pp342-344
A Mohamed Syed Ali
The project aim is to build a smart, little power bicycle dashboard with advanced vision sensor to find whether the rider is wearing a helmet or not and allows start/stop the bike ignition system. Even while riding the bicycle, the system continues the monitoring process, prevents the fire and sends alert messages to traffic authorities if the helmet not worn at any point in time. An alcohol sensor is built-in within the dashboard to prevent the drunk driving situation. GPS and motion sensors assist the system identifies accident scenario and sends alert SMS to traffic authorities and family members. Twitter’s Sentiment Analysis on Gsm Services using Multinomial Naïve Bayes discussed in [11]. The dashboard unit has a Bluetooth transceiver that helps the system to communicate with an Android mobile app running on the user Smartphone to provide SMS sending capability. Weighted Least Squared Approach to Fault Detection and Isolation for GPS Integrity Monitoring discussed in [10]. This design eliminates building power-hungry GSM modems into the vehicle dashboard thus saving vehicle battery power. Model for Post placement Mousing based on GSM in Long-Distance discussed in [9].
Volume: 9
Issue: 2
Page: 342-344
Publish at: 2018-02-01

Detection of Ship Using Image Processing and Neural Network

10.12928/telkomnika.v16i1.7357
Sutikno; University of Diponegoro Sutikno , Helmie Arif; University of Diponegoro Wibawa , Priyo Sidik; University of Diponegoro Sasongko
Indonesia is one of the countries in this world that has the most outstanding fishery potential. There are more than 3000 fish species under Indonesia's sea, yet the people are still not able to relish them completely. Illegal fishing by foreign ships in Indonesia's territorial sea is one of the reasons why this happens. In order to minimize this kind of loss, those ships should be detected automatically by implementing image processing and artificial intelligence techniques. The study proposed techniques for automatic detection of ships at sea on digital images. These techniques are global image thresholding and artificial neural network backpropagation. The result of this research is proposed of technique able to detect ship with 85% accuracy level. This method may be improved by adding more training data varieties.
Volume: 16
Issue: 1
Page: 259-264
Publish at: 2018-02-01

Fuzzy C-Means Algorithm Based Satellite Image Segmentation

10.11591/ijeecs.v9.i2.pp332-334
Syed Nazeebur rehman , Mohameed Ali Hussain
In this paper, an improved version of Fuzzy C-Means (FCM) algorithm is proposed efficiently to segment the satellite images. Segmentation of Image is one of the promising and active researches in recent years. As literature prove that region segmentation will produce better results. Human visual perception is more effective than any machine vision systems for extracting semantic information from image. A FCM algorithm is developed to estimate parameters of the prior probabilities and likelihood probabilities. So FCM algorithm is used for segmenting background and island extraction is done based on pixel intensity. Finally Peak Signal to Noise Ratio (PSNR) is calculated and it has better results than other.
Volume: 9
Issue: 2
Page: 332-334
Publish at: 2018-02-01

A Radial Line Slot Array (RLSA) Antenna with the Specifications of 16 dBi Outdoor patch Antenna

10.12928/telkomnika.v16i1.6727
Teddy; Universitas Islam Negeri Sultan Syarif Kasim Purnamirza , Safrizal; Universitas Islam Negeri Sultan Syarif Kasim Hasbi , Imran M.; Universiti Teknikal Malaysia Malaka Bin Ibrahim , Mulyono; Universitas Islam Negeri Sultan Syarif Kasim Mulyono , Fitri; Universitas Islam Negeri Sultan Syarif Kasim Amillia , Depriwana; Universitas Islam Negeri Sultan Syarif Kasim Rahmi
It is recommended by several researches that RLSA antennas have possibility as an option for Wi-Fi devices antennas. Therefore, to dig deeper this possibility, we designed a RLSA antenna that mimics the specification of an antenna usually found in market, that is 16 dBi outdoor patch antenna. We carried out a parameterization to get a best RLSA antenna model. The model was then fabricated and measured. The measurement results are quite agrees with the simulation results. We found that with the same size of 0.05 m2, our RLSA antennas has better performance in term of gain (2 dB higher), S11 (7 dB lower), and beamwidth (900 wider) compared to the patch antenna. A significant result is that RLSA antenna has much wider bandwidth (815 MHz wider) compared to the patch antenna. A test to our RLSA antenna as an antenna for Wi-Fi devices shows that it works properly.
Volume: 16
Issue: 1
Page: 46-52
Publish at: 2018-02-01

Current State of Personal Data Protection in Electronic Voting: Criteria and Indicator for Effective Implementation

10.12928/telkomnika.v16i1.7718
Muharman; Telkom University Lubis , Mira; International Islamic University Malaysia Kartiwi , Sonny; International Islamic University Malaysia Zulhuda
The adoption of electronic voting has been done in various countries related to cost and time reduction operationally. On the other hand, recent publication has been informed several issues occurred such as technicality, reliability, security and privacy due to the compromised system were used. In small scale, there are certain group of people who want to exploit the vulnerabilities for their own benefit in the election, while in the greater scale, it can reduce public confidence to entrust the adoption of e-voting system to augment participation rate, to improve the quality of voting and to aid the political right effectively. This paper aims to investigate the characteristic of people demanding the legislative to address the criteria and indicator for effective implementation in electronic voting. By understanding the perception of voters in viewing current electoral regulation are essential to provide some ideas and opinions for better enhancement, either through recommendation and drafting related legislation to cater the needs.
Volume: 16
Issue: 1
Page: 290-301
Publish at: 2018-02-01

Growth-site Quality Assessment of Nypa fruticans using Unmanned Aerial Vehicles Images: A case study in Kubu Raya Regency, West Kalimantan Province

10.11591/ijeecs.v9.i2.pp502-511
Adelia Juli Kardika , I Nengah Surati Jaya , Nining Puspaningsih , Fairus Mulia
The growth-site quality is one of the essential information needed to support sustainable forest management particularly in forestry planning. This paper describes the development of a site-quality class of Nypa vegetation by considering the biological and physical factors. The main objective of this study is to develop a discriminant model and to find out major factors that may be used to predict the quality of Nypa growth-sites.The model was developed using variables either measured on UAV images or from field measurement, namely soil texture (X1), water salinity (X2), water pH (X3), crown closure (X4) and stand density (N) measured on the UAV image (X5). The study found that the site quality of Nypa could be indicated by the variation of its biomass content. Then, it was concluded that the major factors that affect the site quality are the soil texture (X1),water salinity (X2),and water pH (X3) with 78.3% of overall accuracy.
Volume: 9
Issue: 2
Page: 502-511
Publish at: 2018-02-01

Improved Field-Oriented Control for PWM Multi-level inverter-Fed Induction Motor Drives

10.11591/ijeecs.v9.i2.pp481-492
Daniel Legrand Mon Nzongo , Emilienne Leugoue , Jianhua Zhang , Gabriel Ekemb
This paper proposes a new approach to ensure the torque decoupled to the rotor flux of an induction machine based on the Field Oriented Control (FOC). The suggested method consists of inserting into the conventional d-q synchronous current controller, coupling terms of motor and multi-level inverter models. Making, the dynamic response of stator current components decoupled as well as the rotor flux and torque. In this paper, the mathematic model of an induction motor and multi-level inverter are first derived. Then, the synchronous current controller and modulation strategy for high power inverters are investigated. Finally, the validation through implementation and simulation of a 4.16 kV electric drive with MATLAB/Simulink and SimPowerSystems is performed.  The model simulated in this paper includes an induction motor, nine-level cascaded H-bridge inverter and a carrier based space vector pulse-width-modulation.The results of the simulations of each method has been recorded and the comparison results reveal that the proposed method effectively maintains the rotor flux decoupled to the torque.
Volume: 9
Issue: 2
Page: 481-492
Publish at: 2018-02-01

Embedded System Practicum Module for Increase Student Comprehension of Microcontroller

10.12928/telkomnika.v16i1.4194
Indrianto; STT-PLN Indrianto , Meilia Nur; STT-PLN Indah Susanti , Rakhmat; STT-PLN Arianto , Riki Ruli A.; STT-PLN Siregar
The result of applying the embedded system in education for students is successfully applied in university. On the other side, many people in Indonesia use smart equipment’s (Hand phone, Remote), but none of those equipments are used in education. University as the source of knowledge should overcome the problem by encouraging the students to use a technology with learning about it first. Embedded System Practicum Module Design needs a prototype method so that the practicum module that is desired can be made. This method is often used in real life. A prototype considered of a part of a product that expresses logic and physical of external interface that is being displayed and this method will fully depend on user contentment. Embedded System Practicum Module Design is made to increase student comprehension of embedded system course and to encourage students to innovate, so that many technologies will be developed and also to help lecturers deliver course subjects. With this practicum it is hoped that the student comprehension will increase significantly. The result of this research is a decent practicum module, hardware or software that can help students to know better about technology and the course subjects so that it will encourage the students to create an embedded system technology. The result of the test has been done; there is an increase of learning value obtained by 7.8%.
Volume: 16
Issue: 1
Page: 53-60
Publish at: 2018-02-01

An Efficient Cloud Scheduling Algorithm for the Conservation of Energy through Broadcasting

10.11591/ijece.v8i1.pp179-188
Kavita Arjun Sultanpure , Abhishek Gupta , L. S. S. Reddy
Method of broadcasting is the well known operation that is used for providing support to different computing protocols in cloud computing. Attaining energy efficiency is one of the prominent challenges, that is quite significant in the scheduling process that is used in cloud computing as, there are fixed limits that have to be met by the system. In this research paper, we are particularly focusing on the cloud server maintenance and scheduling process and to do so, we are using the interactive broadcasting energy efficient computing technique along with the cloud computing server. Additionally, the remote host machines used for cloud services are dissipating more power and with that they are consuming more and more energy. The effect of the power consumption is one of the main factors for determining the cost of the computing resources. With the idea of using the avoidance technology for assigning the data center resources that dynamically depend on the application demands and supports the cloud computing with the optimization of the servers in use.
Volume: 8
Issue: 1
Page: 179-188
Publish at: 2018-02-01

Assessment of Early Hypertensive Retinopathy using Fractal Analysis of Retinal Fundus Image

10.12928/telkomnika.v16i1.6188
Wiharto; Sebelas Maret University Wiharto , Esti; Sebelas Maret University Suryani , Muhammad Y.; Sebelas Maret University Kipti
Hypertensive retinopathy is characterized by changes in retinal vessels, a change known as tortuosity. Automated analysis of retinal vascular changes will make it easier for clinicians to make an initial diagnosis of the disease. The pattern of blood vessels in the retina of the eye can be approached with a fractal pattern. This study proposes a method for the early detection of disease hypertensive retinopathy using the fractal analysis approach fundus retinal image. Variable fractal used is the fractal dimension and lacunarity, whereas for the classification algorithm using ensemble Random Forest and validation using the k-fold cross-validation. Performance measurement using the parameters of accuracy, positive prediction value (PPV), negative prediction value (NPV), sensitivity, specificity and area under the curve (AUC). The test results using 10-fold cross-validation values obtained accuracy 88.0%, PPV 84.0%, NPV 92.0%, sensitivity 91.3%, specificity 85.19%, and 88.25% AUC. The performance is produced when using lacunarity the box size 22. Based on the research results, it can be concluded that early detection of hypertensive retinopathy with fractal analysis approaches have a performance based on AUC produced included in good categories.
Volume: 16
Issue: 1
Page: 445-454
Publish at: 2018-02-01
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