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31,377 Article Results

Address-light and energy aware routing protocol for wireless sensor network

10.12928/telkomnika.v17i4.8662
Hamdollah; Payame Noor University Ghamgin
In recent years, sensor networks applications were used in many criteria. Because of its vast applications, so many researchers studied these networks. Wireless sensor networks contain significant number of sensor nodes; they are suitable medium for collecting and sending data or informing the sink about an event. This study presents a new integrated method for routing in sensor networks which is based on remaining energy of the nodes and existing space between each node and the sink. This method is more suitable for large and medium volume of data. Lifetime enhancement of the network is the main purpose of this method which is obtained by fair division of nodes roles in transmission of data to the sink. In ALERP algorithm (Address Light, Label-Based and Energy-Aware Routing Protocol), in order to reduce network overload and energy consuming as well as enhancement of network lifetime, we used predetermined routes as well as routing based on packet labels. Energy consumption in the entire network is another advantage of this method. The existence of various parameters on this algorithm will lead to more flexibility of it. Generally, conducted simulations indicate higher uniformity in energy consumption of nodes.
Volume: 17
Issue: 4
Page: 1674-1682
Publish at: 2019-08-01

Designs of rectangular-shaped planar Inverted-F antennas at mobile operating frequencies with different ground plane techniques

10.11591/ijeecs.v15.i2.pp927-935
Nurul Inshirah Mohd Razali , Norhudah Seman , Tien Han Chua
This article presents the designs of planar inverted-F antennas (PIFAs) at frequencies of 0.835 GHz, 0.9 GHz, 1.8 GHz, 1.9 GHz, 2 GHz, and 2.6 GHz. Initially, the designs of rectangular-shaped PIFAs are determined through the parametric studies concerning the dimensions of the antenna’s patch length, shorting plate, ground plane, and substrate. Afterward, rectangular-shaped slots are introduced into radiating element of two antennas that operate at a lower frequency range of less than 1 GHz, to tune the resonant frequency to the respective 0.835 GHz and 0.9 GHz. Different configurations of partial or full ground plane are implemented to improve the reflection coefficient, S11 performance to be below -10 dB in both simulation and measurement. The proposed six PIFAs have gain that are greater than 2 dB with the nearly omnidirectional radiation patterns. All the designs and analyses are performed using the CST Microwave Studio utilizing Rogers 4003C substrate.
Volume: 15
Issue: 2
Page: 927-935
Publish at: 2019-08-01

Signal processing with frequency and phase shift keying modulation in telecommunications

10.12928/telkomnika.v17i4.12168
Juliy; Khmelnytsky National University Boiko , Volodymyr; State University of Telecommunications Tolubko , Oleg; State University of Telecommunications Barabash , Oleksander; Khmelnytsky National University Eromenko , Yevhen; State University of Telecommunications Havrylko
In this paper represents research improving effectiveness of signal processing in telecommunication devices especially for its part, which relates to providing its noise resistance in conditions of noise and interference. This objective has been achieved through development of methods and means for optimization of filtering devices and semigraphical interpretation of clock synchronization systems in telecommunications with frequency shift keying on the base of stochastic models what determines relevance of the subject. Separately, in an article considered the urgent task is using of modified synchronization methods based on the interference influence of adjacent symbols on the phase criterion tract, in particular the use of the modified synchronization scheme, in order to get a formalized outlook representation of the synchronization schemas based on the polyphase structures with using a bank of filters, that allows to improve the characteristics of digital telecommunication channels. This work is devoted to the examination and modeling of these ways. The proposed ideas and results for the construction of synchronization systems can be used in modern means of telecommunication.
Volume: 17
Issue: 4
Page: 2025-2038
Publish at: 2019-08-01

Application of the Least Square Support Vector Machine for point-to-point forecasting of the PV Power

10.11591/ijece.v9i4.pp2205-2211
Mahdi Farhadi , Nader Mollayi
In today's industrial world, the growing capacity of renewable energy sources is a crucial factor for sustainable power generation. The application of solar photovoltaic (PV) energy sources, as a clean and safe renewable energy resource has found great attention among the consumers in the recent decades. Accurate forecasting of the generated PV power is an important task for scheduling the generators and planning the consumption patterns of customers to save electricity costs. To this end, it is necessary to develop a global model of the generated power based on the effective factors which are mainly the solar radiation intensity and the ambient weather temperature. As a result of the wide numerical range of these parameters and various weather conditions, a large training database must be used for developing the models, which results in high-computational complexity of the algorithms used for training the models. In this paper, a novel algorithm for point to point prediction of the generated power based on the least squares support vector machine (LS-SVM) has been proposed which can handle the large training database with a very fewer deal of computation and benefits from reasonable accuracy and generalization capability. 
Volume: 9
Issue: 4
Page: 2205-2211
Publish at: 2019-08-01

Onto2DB: towards an eclipse plugin for automated database design from an ontology

10.11591/ijece.v9i4.pp3298-3306
Morad Hajji , Mohammed Qbadou , Khalifa Mansouri
Ontologies are spreading more and more in the field of information technologies as a privileged solution allowing the formalization of knowledge. The theoretical model of ontologies is most promising. They are increasingly ubiquitous given the benefits they present. Despite the proliferation of research proposing approaches dedicated to the design of a database from an ontology, the tools to design a database from an ontology are rare or inaccessible. Thus, in this contribution, we present our approach for the development of an Eclipse Plug-in, in order to automatically generate a conceptual model of a relational database from an ontology. To evaluate the usefulness of our approach, we used our resulting Eclipse Plug-in to automatically generate a conceptual model of a relational database from an ontology, customize it, and automatically generate the corresponding SQL script for Data Definition. The results of this experiment showed that our Plug-in constitutes a concretization of our approach and a means of automatic translation from the ontological model to the relational model.
Volume: 9
Issue: 4
Page: 3298-3306
Publish at: 2019-08-01

Dynamic model development for lead acid storage battery

10.11591/ijeecs.v15.i2.pp609-619
B. V. Rajanna , Malligunta Kiran Kumar
It is widely accepted that electrochemical batteries ensure superior energy storage and reliability of power supply. This paper proposes to discuss the dynamic performance of the Lead Acid Storage battery and to develop an Electrical Equivalent circuit and study its response to sudden changes in the output. A detailed explanation of the discharging process for lead-acid storage batteries and the factors affecting the rate of chemical reactions is provided. The objective of the study is to find the reduction in terminal voltage due to the change in reaction rate and to evolve a simple dynamic model for discharge of the battery.
Volume: 15
Issue: 2
Page: 609-619
Publish at: 2019-08-01

A study of distilled water and zamzam water as dielecric dense patch antenna at 5 GHz

10.11591/ijeecs.v15.i2.pp942-949
N. H. Moktar , W. I. Roseli , M. T. Ali , R. A. Awang
This paper was performed in order to study about distilled water and zamzam water which act as dielectric dense (DD) patch antenna at 5 Ghz applications. This antenna is proposed and designed using FR-4 substrate that sandwiched together to perform DD structure. The proposed antennas employ simple rectangular structure that fed with inset feeder surround by electromagnetic bandgap (EBG) structure.In order too enhance the gain, superstrate is applied on top of the antenna. This antenna offers a wideband return loss of more than -10dB between 4.41-5.52Ghz (around 22.2%) which can be applied in 5 Ghz applications. Details of DD water antenna of center frequency for 5 Ghz is presented and discussed.
Volume: 15
Issue: 2
Page: 942-949
Publish at: 2019-08-01

Strategies of linear feedback control and its classification

10.12928/telkomnika.v17i4.10989
Saad Fawzi; University of Mosul AL-Azzawi , Maysoon M.; University of Mosul Aziz
This paper is concerned with the control problem for a class of nonlinear dynamical (hyperchaotic) systems based on linear feedback control strategies. Since the obtaining positive feedback coefficients are required for these strategies. From this point of view, the available ordinary/dislocated/enhancing and speed feedback control strategies can be classified into two main aspects: control the dynamical systems or can't be control although it own a positive feedback coefficients. So, we focused on these cases, and suggest a new method to recognize which system can be controller it or not. In this method, we divided the positive feedback coefficient which obtain from these strategies in to four categories according to possibility of suppression and show the reason for each case. Finally, numerical simulations are given to illustrate and verify the results.
Volume: 17
Issue: 4
Page: 1931-1940
Publish at: 2019-08-01

Road markers classification using binary scanning and slope contours

10.12928/telkomnika.v17i4.12759
Zamani Md; Universiti Teknikal Malaysia Melaka Sani , Hadhrami Abd; Multimedia University Ghani , Rosli; Multimedia University Besar , Azizul; Universiti Teknologi Malaysia Azizan
Road markers guide the driver while driving on the road to control the traffic for the safety of the road users. With the booming autonomous car technology, the road markers classification is important in its vision segment to navigate the autonomous car. A new method is proposed in this paper to classify five types of road markers namely dashed, single, double, solid-dashed and dashed-solid which are commonly found on the two lane single carriageway. The classification is using unique feature acquired from the binary image by scanning on each of the images to calculate the frequency of binary transition. Another feature which is the slopes between the two centroids which allow the proposed method, to perform the classification within the same video frame period. This proposed method has been observed to achieve an accuracy value of at least 93%, which is higher than the accuracy value achieved by the existing methods.
Volume: 17
Issue: 4
Page: 2048-2057
Publish at: 2019-08-01

Performance Evaluation of Fine-tuned Faster R-CNN on specific MS COCO Objects

10.11591/ijece.v9i4.pp2548-2555
Garima Devnani , Ayush Jaiswal , Roshni John , Rajat Chaurasia , Neha Tirpude
Fine-tuning of a model is a method that is most often required to cater to the users’ explicit requirements. But the question remains whether the model is accurate enough to be used for a certain application. This paper strives to present the metrics used for performance evaluation of a Convolutional Neural Network (CNN) model. The evaluation is based on the training process which provides us with intermediate models after every 1000 iterations. While 1000 iterations are not substantial enough over the range of 490k iterations, the groups are sized with 100k iterations each. Now, the intention was to compare the recorded metrics to evaluate the model in terms of accuracy. The training model used the set of specific categories chosen from the Microsoft Common Objects in Context (MS COCO) dataset while allowing the users to use their externally available images to test the model’s accuracy. Our trained model ensured that all the objects are detected that are present in the image to depict the effect of precision.
Volume: 9
Issue: 4
Page: 2548-2555
Publish at: 2019-08-01

Live forensics of tools on android devices for email forensics

10.12928/telkomnika.v17i4.11748
Rusydi; Universitas Ahmad Dahlan Umar , Imam; Universitas Ahmad Dahlan Riadi , Bashor Fauzan; Universitas Ahmad Dahlan Muthohirin
Email is one communication technology that can be used to exchange information, data, and etc. The development of email technology not only can be opened using a computer but can be opened using an smartphone. The most widely used smartphone in Indonesian society is Android. Within a row, the development technology of higher cybercrime such as email fraud catching cybercrime offenders need evidence to be submitted to a court, for obtain evidence can use tools like Wireshark and Networkminer to analyzing network traffic on live networks. Opportunity, we will do a comparison of the forensic tools it to acquire digital evidence. The subject of this research focused on Android-based email service to get as much digital evidence as possible on both tools. This process uses National Institute of Standards and Technology method. The results of this research that networkminer managed to get the receiving port, while in Wireshark not found.
Volume: 17
Issue: 4
Page: 1803-1809
Publish at: 2019-08-01

Circularly polarized microstrip patch antenna array for GPS application

10.11591/ijeecs.v15.i2.pp920-926
Taher Khalifa , N. M. Sahar , N. Ramli , M. T. Islam
The 12 elements antenna array for GPS system having high gain with circular polarization is presented in this paper. The circularly polarized antenna is very suitable for the use of various wireless systems such as Global Positioning System with operating frequency is 1.27 GHz with AR is less than 3 dB between 82˚ and 140˚.The antenna consists of twelve main radiation patches connected in parallel. The antennas array are designed on the Rogers RT5880 substrate with a dielectric constant (εr) of 2.2 and thickness is 0.787 mm. The antenna is excited with an inset feed line and it operates in L-band with a resonant frequency of 1.27 GHz.
Volume: 15
Issue: 2
Page: 920-926
Publish at: 2019-08-01

Power transmission lines electromagnetic pollution with consideration of soil resistivity

10.12928/telkomnika.v17i4.12771
Ali; College of Electrical and Electronics Technology-Benghazi Elgayar , Zulkurnain; Universiti Teknologi Malaysia Abdul-Malek , Ruqayyah; Universiti Teknologi Malaysia Othman , Ibtihal Fawzi; College of Electrical and Electronics Technology-Benghazi Elshami , A. M.; College of Electrical and Electronics Technology-Benghazi Elbreki , Visa Musa; Universiti Teknologi Malaysia Ibrahim , Mohammed Imran; Universiti Teknologi Malaysia Mousa , Chin-Leong; Universiti Malaysia Perlis Wooi
The alternating current (AC) total interference of power lines may pose a threat to personnel and equipment in its vicinity. The main objective of this work is to determine the electromagnetic distribution and induced voltages on human body, equipment, and houses due to the AC total interference for different soil resistivities. The electromagnetic field and induced voltages may cause health problems to the human body and put it at risk. Two main approaches were used to compute the electromagnetic and induced voltages, namely the field approach, which is based on electromagnetic field distribution, and the circuit approach, which uses the circuit grounding analysis to compute the conductive interference and then uses the circuit based models to compute the inductive interference. Human body, steel houses and 10-km-long transmission line were modelled. The soil resistivity was varied, and the induced voltages obtained from both approaches were compared. Soil resistivity and soil structure are important parameters that affect the AC interference level. The results show that the touch voltage increases when the distance between electromagnetic source and human body increases. For high soil resistivity, the danger of the touch voltage becomes more prominent compared to that for low soil resistivity. Power system voltage level and soil resistivity are two key factors influencing the induced voltage level.
Volume: 17
Issue: 4
Page: 1985-1991
Publish at: 2019-08-01

Characterization of excitation source LEDs and sensors without filters for measuring fluorescence in fluorescein and green leaf extract

10.12928/telkomnika.v17i4.11985
Miguel Ángel; Universidad Nacional de Colombia Garrido Tamayo , Fredy Edimer; Universidad Nacional de Colombia Hoyos Velasco , John E.; Universidad Nacional de Colombia Candelo-Becerra
This paper presents the characterization of excitation source LEDs and sensors without filters for measuring fluorescence in fluorescein and green leaf extract. For this purpose, eight light-emitting diodes (LEDs) were used with the following characteristics: one blue, one green, one red, one infrared, and four violets. The first four LEDs were used as sensors without filters to detect fluorescence induced by the other four violet LEDs in 11 samples of different fluorescein concentrations and in 14 samples of different dilutions of green leaf extract. The results show that infrared LEDs can detect the red emission of green leaf extract and red and infrared LEDs detect the fluorescence of fluorescein in concentrations of up to 1.8 μM. The developed system allows and facilitates teaching optical spectroscopy in basic education without incurring high costs.
Volume: 17
Issue: 4
Page: 1838-1844
Publish at: 2019-08-01

Electricity theft detection framework based on universal prediction algorithm

10.11591/ijeecs.v15.i2.pp758-768
Abdulrahaman Okino Otuoze , Mohd Wazir Mustafa , Ibim Ebianga Sofimieari , Abdulhakeem Mohd Dobi , Aliyu Hamza Sule , Abiodun Emmanuel Abioye , Muhammad Salman Saeed
Electricity theft has caused huge losses over the globe and the trend of its perpetuation constantly evolve even as smart technologies such as smart meters are being deployed. Although the smart meters have come under some attacks, they provide sufficient data which can be analysed by an intelligent strategy for effective monitoring and detection of compromised situations. So many techniques have been employed but satisfactory result is yet to be obtained for a real-time detection of this electrical fraud. This work suggests a framework based on Universal Anomaly Detection (UAD) utilizing Lempel-Ziv universal compression algorithm, aimed at achieving a real-time detection in a smart grid environment. A number of the network parameters can be monitored to detect anomalies, but this framework monitors the energy consumption data, rate of change of the energy consumption data, its date stamp and time signatures. To classify the data based on normal and abnormal behaviour, Lempel-Ziv algorithm is used to assign probability of occurrence to the compressed data of the monitored parameters. This framework can learn normal behaviours of smart meter data and give alerts during any detected anomaly based on deviation from this probability. A forced aggressivemeasure is also suggested in the framework as means of applying fines to fraudulent customers.
Volume: 15
Issue: 2
Page: 758-768
Publish at: 2019-08-01
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