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29,758 Article Results

A Cooperative Cache Management Scheme for IEEE802.15.4 based Wireless Sensor Networks

10.11591/ijece.v8i3.pp1701-1710
Piyush Charan , Tahsin Usmani , Rajeev Paulus , Syed Hasan Saeed
Wireless Sensor Networks (WSNs) based on the IEEE 802.15.4 MAC and PHY layer standards is a recent trend in the market. It has gained tremendous attention due to its low energy consumption characteristics and low data rates. However, for larger networks minimizing energy consumption is still an issue because of the dissemination of large overheads throughout the network. This consumption of energy can be reduced by incorporating a novel cooperative caching scheme to minimize overheads and to serve data with minimal latency and thereby reduce the energy consumption. This paper explores the possibilities to enhance the energy efficiency by incorporating a cooperative caching strategy.
Volume: 8
Issue: 3
Page: 1701-1710
Publish at: 2018-06-01

Design of Dual Band Stacked RDRA for 5G Applications

10.12928/telkomnika.v16i3.9037
A. I.; Universiti Teknologi Malaysia (UTM) Bugaje , M. H.; Universiti Teknologi Malaysia (UTM) Jamaluddin , R.; Universiti Teknologi Malaysia (UTM) Selvaraju , M. N.; Universiti Teknologi Malaysia (UTM) Hafiz , AdulKadir Bello; University of Science and Technology Allero Shallah
This paper focuses on the investigation and discussion of three different designs of stacked Rectangular Dielectric Resonator Antenna (RDRA) at dual bands of 25 GHz and 32 GHz for 5G applications. First, basic stacked RDRA. Second, basic stacked RDRA with a single notch. Third, basic stacked RDRA with double notches. All the proposed structure consists of two stacked DRA of dielectric permittivity of 10 which mounted on a Duriod dielectric substrate of dielectric permittivity of 2.2 and feed by Microstrip aperture slot feeding technique (MSA) for 50 Ω characteristic impedance. Authentication of all the proposed designs comparison is completed using 3D simulation tool by observing the performance of reflection coefficient, bandwidth, and gain. All the proposed RDRA are demonstrated simulated reflection coefficient lower than 20 dB for both bands and simulated gain more than 6 dBi. Meanwhile, for simulated bandwidth, only the proposed basic stacked RDRA with single and double notches are demonstrated simulated bandwidth more than 1 GHz, which fulfill the requirement for 5G applications.
Volume: 16
Issue: 3
Page: 1120-1125
Publish at: 2018-06-01

Security Solutions Using Brain Signals

10.11591/ijai.v7.i2.pp105-110
Anupama. H.S , Anusha M , Aparna Joshi , Apoorva N , N.K. Cauvery , Lingaraju. G.M
A Brain Computer Interface is a direct neural interface or a brain–machine interface. It provides a communication path between human brain and the computer system. It aims to convey people's intentions to the outside world directly from their thoughts. This paper focuses on current model which uses brain signals for the authentication of users. The Electro- Encephalogram (EEG) signals are recorded from the neuroheadset when a user is shown a key image (signature image). These signals are further processed and are interpreted to obtain the thought pattern of the user to match them to the stored password in the system. Even if other person is presented with the same key image it fails to authenticate as the cortical folds of the brain are unique to each human being just like a fingerprint or DNA.
Volume: 7
Issue: 2
Page: 105-110
Publish at: 2018-06-01

Planning of Energy Saving with Cogeneration System

10.12928/telkomnika.v16i3.5651
Imam Abdul; Universitas Muria Kudus Rozaq , NYD; Universitas Muria Kudus Setyaningsih , Budi; Universitas Muria Kudus Gunawan
PT Dua Kelinci is one of the largest food industries in Pati Regency one of whose products is egg peanut which needs huge electric and heat energy so that energy saving needs to be done. One of the efforts of energy saving is by conducting cogeneration (merging between electric and heat). This research started from a data collection, i.e. finding out the need of electricity and heat in the process of egg-peanut manufacture by a cogeneration technology at PT Dua Kelinci. The research method includes technical analysis and economic analysis. From the technical analysis, it is found that the electric energy saving by using cogeneration 103.680 kW and the heat energy saving is 4,075 TJ/year. From the economic analysis it is seen that before using cogeneration the cost that should be expended is USD 75.209,61 while after using cogeneration the cost is USD 60.6014,04 therefore from the economic aspect there is energy saving as much as USD 15.19,57/year.
Volume: 16
Issue: 3
Page: 989-996
Publish at: 2018-06-01

Rain Rate Distributions for Microwave Link Design Based on Long Term Measurement in Malaysia

10.11591/ijeecs.v10.i3.pp1023-1029
Islam Md Rafiqul , Md Moktarul Alam , Ali Kodhim Lwas , Sarah Yasmin Mohamad
Attenuation due to rain is an important constraint in microwave radio link design especially at frequencies above 10 GHz. It restricts the path length of radio communication systems and limits the use of higher frequencies for line-of-sight microwave links and satellite communications. In order to predict the attenuation due to rain accurately rainfall intensity is required with 1-minute integration time. Rainfall is a meteorological phenomenon with complex structure due to its variability in space, duration and occurrence frequency, particularly in tropical and equatorial regions. Since, the statistical distribution of rain attenuation is obtained from the rain rate distribution for the region considered, it should be noted that the accuracy of the rain rate measurement affects the accuracy of the attenuation estimation. This paper presents rain intensity with 1-minute integration time measured for 6 years in Malaysia, it’s distribution, comparison with other prediction models and impact on high frequency microwave links.
Volume: 10
Issue: 3
Page: 1023-1029
Publish at: 2018-06-01

Structural Health Monitoring Sensor based on A Flexible Microstrip Patch Antenna

10.11591/ijeecs.v10.i3.pp917-924
Hamse Abdillahi Haji Omer , Saidatul Norlyana Azemi , Azremi Abdullah Al-Hadi , Ping Jack Soh , Mohd Faizal Jamlos
A microstrip patch antenna strain sensor operating at dual frequencies 1.8GHz and 2.4GHz have been designed based on the relation between the resonant frequency and the strain applied to it. Felt substrate with a height of 3mm and dielectric constant of 1.44 and shield conductor are used for the design of this antenna. Testing results show that the resonant frequency of the microstrip patch antenna is 1.78 GHz and 2.4 GHz, which agrees with the simulation. The resonant frequency of the microstrip patch antenna increases linearly with the increase of the applied strain. This microstrip patch antenna strain sensor can be integrated with other components easily and have a great potential applications in structural health monitoring systems.
Volume: 10
Issue: 3
Page: 917-924
Publish at: 2018-06-01

Effect of the Thickness of High Tc Superconducting Rectangular Microstrip Patch over Ground Plane with Rectangular Aperture

10.11591/ijece.v8i3.pp1611-1617
Nabil Boukhennoufa , Lotfi Djouane , Houcine Oudira , Mounir Amir , Tarek Fortaki
In recent years, a great interest has been observed in the development and use of new materials in microwave technology. Particularly, a special interest has been observed in the use of superconducting materials in microwave integrated circuits, this is due to their main characteristics. In this paper, the complex resonant frequency problem of a superconductor patch over Ground Plane with Rectangular Aperture is formulated in terms of an integral equation, the kernel of which is the dyadic Green’s function. Galerkin’s procedure is used in the resolution of the electric field integral equation. The surface impedance of the superconductor film is modeled using the two fluids model of Gorter and Casimir. Numerical results concerning the effect of the thickness of the superconductor patch on the characteristics of the antenna are presented.
Volume: 8
Issue: 3
Page: 1611-1617
Publish at: 2018-06-01

Perfecting A Video Game with Game Metrics

10.12928/telkomnika.v16i3.7209
Junaidi; STMIK Raharja Junaidi , Andy; Bina Nusantara university Julianto , Nizirwan; Esa Unggul university Anwar , Safrizal; Bina Nusantara University Safrizal , Harco Leslie Hendric; Bina Nusantara University Spits Warnars , Kiyota; Prince Songkla university, Thailand Hashimoto
A state of a perfect video game is what developers has been seeking for their product developments, to achieve the selected state, several standards and methods needs to be applied. These standards and methods are special: they are both verifiable and quantifiable, to make their action and end goal a clear one, the terms for this standards and methods are called ‘game metrics’ and we decided that this is a must-have tool or method to be implanted in a development of a game because it will boost your standards rapidly and will be able to tell you about your own progress of the development.
Volume: 16
Issue: 3
Page: 1324-1331
Publish at: 2018-06-01

Speech Input as an Alternative Mode to Perform Multi-touch Gestures

10.12928/telkomnika.v16i3.8417
Nor Hidayah; Universiti Kebangsaan Malaysia Hussain , Tengku Siti Meriam; Universiti Kebangsaan Malaysia Tengku Wook , Siti Fadzilah; Universiti Kebangsaan Malaysia Mat Noor , Hazura; Universiti Kebangsaan Malaysia Mohamed
Speech is fundamental and the most dominant form of communication. Speech input may facilitate natural interaction between humans and computers. For children, this input mode supports their interaction with application systems. This study addresses speech input as an alternative mode in order to improve multi-touch gesture interactions. Previous studies show that children difficult to perform multi-touch gestures successfully. In fact, multi-touch is parts of basic core gestures that have been adapted to most of the learning applications. This study uses the Wizard-of-Oz method and posts interview, involving nine preschool children between ages of four to six years old. Results of the study show children’s interactional ability using speech input towards systems and positive feedback received from them regarding the prototype of the systems. The findings from this study highlight the opportunities and challenges in using speech input to increase the success of children’s interaction with multi-touch gestures.
Volume: 16
Issue: 3
Page: 1367-1375
Publish at: 2018-06-01

Classification of Atrial Arrhythmias using Neural Networks

10.11591/ijai.v7.i2.pp90-94
Jai Utkarsh , Raju Kumar Pandey , Shrey Kumar Dubey , Shubham Sinha , S. S. Sahu
Electrocardiogram (ECG) is an important tool used by clinicians for successful diagnosis and detection of Arrhythmias, like Atrial Fibrillation (AF) and Atrial Flutter (AFL). In this manuscript, an efficient technique of classifying atrial arrhythmias from Normal Sinus Rhythm (NSR) has been presented. Autoregressive Modelling has been used to capture the features of the ECG signal, which are then fed as inputs to the neural network for classification. The standard database available at Physionet Bank repository has been used for training, validation and testing of the model. Exhaustive experimental study has been carried out by extracting ECG samples of duration of 5 seconds, 10 seconds and 20 seconds. It provides an accuracy of 99% and 94.3% on training and test set respectively for 5 sec recordings. In 10 sec and 20 sec samples it shows 100% accuracy. Thus, the proposed method can be used to detect the arrhythmias in a small duration recordings with a fairly high accuracy.
Volume: 7
Issue: 2
Page: 90-94
Publish at: 2018-06-01

Age Constraints Effectiveness on the Human Community Based Genetic Algorithm (HCBGA)

10.11591/ijai.v7.i2.pp78-82
Nagham A. Al-Madi , Amnah A. El-Obaid
In this paper, we use under-age constraints and apply it to the Traveling Salesman Problem (TSP). Values and results concerning the averages and best fits of both, the Simple Standard Genetic Algorithm (SGA), and an improved approach of Genetic Algorithms named Human Community Based Genetic Algorithm (HCBGA) are being compared. Results from the TSP test on Human Community Based Genetic Algorithm (HCBGA) are presented. Best fit solutions towards slowing the convergence of solutions in different populations of different generations show better results in the Human Community Based Genetic Algorithm (HCBGA) than the Simple Standard Genetic Algorithm (SGA).
Volume: 7
Issue: 2
Page: 78-82
Publish at: 2018-06-01

Lowpass Filter with Hilbert Curve Ring and Sierpinski Carpet DGS

10.12928/telkomnika.v16i3.7722
Dian Widi; Universitas Mercu Buana Astuti , Intan; Universitas Mercu Buana Wahyuni , Muslim; Universitas Mercu Buana Muslim , Mudrik; Universitas Mercu Buana Alaydrus
Good performance and compact size are the paramaters which are vital when desiging a filter. One of the creteria of good performance is selectivity. This research, conducted by Hilbert Curve Ring and Siepinski Carpet, is used as defected ground structure to overcome filter selectivity. By using three cascadeds Hilbert Curve Ring defected ground structure cells and three steps Sierpinski carpet, a lowpass filter is designed and fabricated. The measurement result for lowpass filterwith Hilbert Curve Ring defected ground structure has sharper selectivity with the cut off frequency at 2.173 GHz and the insertion loss value is 2.135 dB. While the measurement result for three steps Sierpinski carpet has the cut off frequency at 1.728 GHz and the insertion loss value is 0.682 dB.
Volume: 16
Issue: 3
Page: 1092-1100
Publish at: 2018-06-01

Integrative Model for Quantitative Evaluation of Selection Telecommunication Tower Site

10.12928/telkomnika.v16i3.8922
Janah A.; Girne American University Asassfeh , Mokhled; Mutah University AlTarawneh , Fadiya; Girne American University Samson
This paper analyzes the weight of impact factors on selection the antenna places for mobile telecommunication system in Jordan. The new technique plays a lead role in divided area and selects the place of antennas' sites. The main objective of this research is to minimize the antenna numbers in order to reduce the cost. Research follows flowcharting categories and stages as: The first stage aim to classify the effective factors on the: signal radius, better position of antenna from candidate points, reserved area, and non-preferring position. The second stage focuses on finding the effective weight of these factors on the decision. The third stage suggest the new proposed approach by implement the MCLP and P-center problems in linear function. The last stage has the pseudo code for the proposed approach, where the proposed approach provides the solution that helps the planners in telecommunication industry and in related government agencies make informed position of the antennas.
Volume: 16
Issue: 3
Page: 1158-1164
Publish at: 2018-06-01

AC-AC Voltage Controller of Power Supply for Heater on Drying System

10.12928/telkomnika.v16i3.5194
Renny; Politeknik Elektronika Negeri Surabaya Rakhmawati , Farid Dwi; Politeknik Elektronika Negeri Surabaya Murdianto
The coconut fruits is very useful to be processed into cooking oil and it can meet the needs of cooking for Indonesia people, But before the coconuts processed into oil, The coconuts should be dried first. Usually the drying process is manually, that is dried in the sun. Unfortunately this way is not hygienic and can’t be done continuously, causing the coconut fungus overgrow. This paper proposes methode to solve the problem above.This research makes the dryer coconut fruitssystem by using the heater.Dryer system used for dry some coconut fruits that must be reduced the water content up to 5%, this dry coconutis called copra. System requires heater which will be regulated the temperature. Heater temperature setting is done by adjusting the heater supply voltage, and this is the task of ac to ac voltage controller. Ac to ac voltage controller is a circuit converter is capable converting ac voltage with value 220 Vrms at 50 Hz frequency and have waveform pure sinusoidal become ac voltage frequency at 50 Hz with an output voltage suitable with our need but the voltage waveform not impure sinusoidal or defective as a result firing angle effects. The output voltage which we set determines the value of the heater temperature. The output voltage is set from the firing angle of the triac component using the addition and decreasing angle values. Based on the results of experiments that have been done, if the drying chamber which has volume 135.2 liters and the temperature regulated at 700 C then the heater with a power requirement of 400 W should receive supply 216 V from ac to ac voltage controller. So the triac of ac to ac voltage controller fired on 0.55 radians so that the to ac voltage controller that gets 220 V input voltage can produce 216 V output voltage.
Volume: 16
Issue: 3
Page: 1061-1070
Publish at: 2018-06-01

Interference Temperature Measurements and Spectrum Occupancy Evaluation in the Context of Cognitive Radio

10.11591/ijeecs.v10.i3.pp1007-1012
Paulson N. Eberechukwu , Dauda S. Umar , Alias Mohd , Kamaludin M. Y. , M. Adib bin Sarijari , Rozeha A. Rashid
This paper presents a refined radio spectrum measurement platform specifically designed for spectrum occupancy surveys in the context of Cognitive radio. Cognitive radio permits the opportunistic usage of licensed bands by unlicensed users without causing harmful interference to the licensed user. In this work, a study based on the measurement of the 800 MHz to 2.4 GHz frequency band at two different locations inside Universiti Teknologi Malaysia (UTM), Johor Bahru campus, Malaysia is presented. Two Tektronix RSA306B spectrum analyzer are set up to conduct simultaneous measurements at different locations for a 24 hours period. The analysis conducted in this work is based on the real spectrum data acquired from environment in the experimental set up. Busy and idle channels were identified. The channels subject to adjacent-channel interference were also identified, and the impact of the detection threshold used to detect channel activities was also discussed. The consistency of the observed channel occupation over a range of thresholds and a sudden drop has good characteristics in determining an appropriate threshold needed in order to avoid interference.
Volume: 10
Issue: 3
Page: 1007-1012
Publish at: 2018-06-01
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