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29,061 Article Results

Investigation of the Optimal Position of Wind Sensors and Wind Turbines on a Building: A Computational Fluid Dynamics Study

10.11591/ijeecs.v8.i3.pp756-761
Leon Chan , Mohd Eqwan Bin Mohd Roslan , Hassan Bin Mohamed
Most numerical studies on flow over buildings simplify the geometry of the roof and assume that it is flat. This may lead to misrepresentation of the flow as the roof of actual buildings contains some sort of roughness. In this study, the flow over the administrative building of Universiti Tenaga Nasional is investigated for multidirectional flow conditions. The actual topology of the building is gridded and simulated using the steady-state Reynolds-averaged Navier-Stokes equation. Four points at the top of the building are identified and the wind statistics at these designated locations at three different heights are investigated. The optimal location with the highest average wind speed and consistent wind speeds for all wind angles is identified and is earmarked as a potential location to install the wind turbine. 
Volume: 8
Issue: 3
Page: 756-761
Publish at: 2017-12-01

The Competition Between ISPs in Presence of the Net Neutrality

10.11591/ijict.v6i3.pp166-178
Mohamed El Amrani , Hamid Garmani , Mohamed Baslam , Rachid El Ayachi
In this work, we present an economic model of computer networks that describes the in-teraction between Internet Service Providers (ISP ), customers and content provider. The competition between ISP s may be translated by the prices they require and the qualities of service (QoS) they offer. The customer demand for service from an ISP does not only de-pend on the price and quality of service (QoS) of the ISP , but it is influenced by all those offered by its competitors. This behavior has been extensively analyzed using game the-ory as a decision support tool. We interpret a non-neutral network when a content provider privileges ISP s by offering them more bandwidth to ensure proper QoS to support ap-plications that require more data transport capacity (voice over internet protocol (V OIP ) the live video streaming, online gaming). In addition, our work focuses on the price game analysis and QoS between ISP s in two cases: neutral network and non-neutral network. After showing the existence and uniqueness of equilibrium in terms of quality of service, we analyzed the impact of net neutrality on competition between ISP s. We also validated our theoretical study with numerical results, which show that the game has an equilibrium point which depends on all the parameters of the system.
Volume: 6
Issue: 3
Page: 166-178
Publish at: 2017-12-01

Compact Dual-band Parallel Coupled T-shaped SIR Filter for WLAN Applications

10.12928/telkomnika.v15i4.5584
Emad S.; University of Technology, Iraq Ahmaed
In this article, a new compact dual-band bandpass filter was introduced. The filter utilized two operating bands centered at 2.45 GHz and 5 GHz widely used for wireless local area network applications. The filter consists of T-shaped sections of step impedance resonator. The structure is an even symmetrical around electrical or magnetic wall, so the operation mechanism of the filter can be analyzed by an even- and odd-mode transmission line theory. The resonator structure is parallel coupled to a pair of 50 Ω input/output ports. Proper feeding and coupling structures can realize at least two transmission zeros around each of the operating band. To enhance the spurs rejection in the out of the band response of the filter, additive transmission zero at 10 GHz was created by adding stub of quarter guided wavelength at a selected distant from the output port edge. The filter is designed and optimized using the full wave Electromagnetic simulator. The center frequency of the designed bands can be easily refined by the filter dimensions. The overall dimension of the filter is (where  is the guided wavelength at the frequency of 2.45 GHz) corresponding to 14.3 mm x 22 mm.
Volume: 15
Issue: 4
Page: 1677-1681
Publish at: 2017-12-01

Parallel Connected VSI Inverter using Multi-carrier based Sinusoidal PWM Technique

10.12928/telkomnika.v15i4.6477
D.; SRM University, India Karthikeyan , R.; SRM University, India Palanisamy , K.; SRM University, India Vijayakumar , A.; Navodaya Institute of Technology, India Velu , D.; SRM University, India Selvabharathi
This paper explains the simulation and modelling of Parallel operation of VSI inverter using multi-carrier based PWM technique. By this proposed method three level inverter output voltages generated instead of using multilevel inverter or two level dual VSI inverter. This system employs single dc voltage source, which gives supply to both VSI inverter by using parallel connection. The multi-carrier based pulse width modulation technique affianced to control the inverter power switches. The proposed system offers improved output voltage, better current control and reduced harmonic distortion. The simulation results of this proposed system was verified using matlab/simulink.
Volume: 15
Issue: 4
Page: 1625-1631
Publish at: 2017-12-01

250 MHz Multiphase Delay Locked Loop for Low Power Applications

10.11591/ijece.v7i6.pp3323-3331
Shruti Suman , K. G. Sharma , P. K. Ghosh
Delay locked loop is a critical building block of high speed synchronous circuits. An improved architecture of amixed signaldelay locked loop (DLL) is presented here. In this DLL, delay cell based on single ended differential pair configuration is used for voltage controlled delay line (VCDL) implementation. This delay cell provides a high locking range with less phase noise and jitter due to differential pair configuration.For increasing the acquisition range and locking speed of the DLL, modified true single phase clock (TSPC) based phase frequency detector is used. The proposed design is implemented at 0.18 um CMOS technology and at power supply of 1.8V . It has power consumption of 1.39 mW at 125 MHz center frequency with locking range from 0.5 MHz to 250 MHz.
Volume: 7
Issue: 6
Page: 3323-3331
Publish at: 2017-12-01

New Watermarking/Encryption Method for Medical Imaging FULL Protection in m-Health

10.11591/ijece.v7i6.pp3385-3394
Mohamed Boussif , Nourredinne Aloui , Adnene Cherif
In this paper, we present a new method for medical images security dedicated to m-Health based on a combination between a novel semi reversible watermarking approach robust to JPEG compression, a new proposed fragile watermarking and a new proposed encryption algorithm. The purpose of the combination of these three proposed algorithms (encryption, robust and fragile watermarking) is to ensure the full protection of medical image, its information and its report in terms of confidentiality and reliability (authentication and integrity). A hardware implementation to evaluate our system is done using the Texas instrument C6416 DSK card by converting m-files to C/C++ using MATLAB coder. Our m-health security system is then run on the android platform. Experimental results show that the proposed algorithm can achieve high security with good performance.
Volume: 7
Issue: 6
Page: 3385-3394
Publish at: 2017-12-01

Fault Distance Identification Using Impedance and Matching Approaches on Distribution Network

10.11591/ijeecs.v8.i3.pp770-778
Lilik Jamilatul Awalin , H. Mokhlis , M. K. Rahmat , Sophi Shilpa , Fadi Albatsh , Bazilah Ismail
In this paper, impedance based method and matching approaches were used separately to detect three phase to ground fault (LLLGF). In order to observe the accuracy of each method, Non-homogeneous distribution network was used as a tested network. Actual data from TNB (Tenaga National Berhad) Malaysia was adopted to model the network by using PSCAD/EMTDC simulation program.  Both methods were tested to observe the accuracy of fault distance estimation. The comparison result shows different accuracy for each section which simulated in the middle of section. Based on the complexity of the distribution network, it possible to contribute difficulty to obtain the maximum accuracy. The result was obtained through the complete process which involves the database formation acquired through the PSCAD/EMTDC software simulator and the fault location distance calculation carried out by the MATLAB software.
Volume: 8
Issue: 3
Page: 770-778
Publish at: 2017-12-01

Capacitive and Inductive Line Reactance for Network Reconfiguration

10.11591/ijeecs.v8.i3.pp751-755
Aiman Suhailah Saifuddin , Karmila Kamil , Halimatun Hashim , Ruthraganapathy Radhakrishnan
Solar PV may cause power congestion to occur in a transmission line when there is high solar irradiance that causing solar PV to generate more power flow than demanded power flow. Transmission line congestion that can be made worst by adding extra power generating farm such as centralized PV farm of renewable energy which helps to deliver customers with the demand or load required. The power generated coming from solar PV is depending on the weather and can definitely worsen the flow in transmission line due to the power captured. In this case, the high solar irradiance can affect the power generated from solar PV and will cause power congestion when power generated is higher than the load demanded. In this paper, the proposed method used to overcome the power congestion in a transmission line is by rerouting the excess power from the overloaded line to underloaded line by changing the line reactance of the line. An IEEE 30 bus test system is developed in PSS/E software as the test system. The output monitored is the line stability index of the affected line before and after rerouting process.
Volume: 8
Issue: 3
Page: 751-755
Publish at: 2017-12-01

An Optimal LFC in Two-Area Power Systems Using a Meta-heuristic Optimization Algorithm

10.11591/ijece.v7i6.pp3217-3225
Mushtaq Najeeb , Muhamad Mansor , Hameed Feyad , Esam Taha , Ghassan Abdullah
In this study, an optimal meta-heuristic optimization algorithm for load frequency control (LFC) is utilized in two-area power systems. This meta-heuristic algorithm is called harmony search (HS), it is used to tune PI controller parameters ( ) automatically. The developed controller (HS-PI) with LFC loop is very important to minimize the system frequency and keep the system power is maintained at scheduled values under sudden loads changes. Integral absolute error (IAE) is used as an objective function to enhance the overall system performance in terms of settling time, maximum deviation, and peak time. The two-area power systems and developed controller are modelled using MATLAB software (Simulink/Code). As a result, the developed control algorithm (HS-PI) is more robustness and efficient as compared to PSO-PI control algorithm under same operation conditions.
Volume: 7
Issue: 6
Page: 3217-3225
Publish at: 2017-12-01

The Impact of Color Space and Intensity Normalization to Face Detection Performance

10.12928/telkomnika.v15i4.6718
I Nyoman; Udayana University Bukit Jimbaran Politeknik Negeri Bali, Indonesia Gede Arya Astawa , I Ketut; Udayana University, Indonesia Gede Darma Putra , I; Udayana University, Indonesia Made Sudarma , Rukmi; Udayana University, Indonesia Sari Hartati
In this study, human face detection have been widely conducted and it is still interesting to be research. In this research, strong impact of color space for face i.e., many and multi faces detection by using YIQ, YCbCr, HSV, HSL, CIELAB, and CIELUV are proposed. In this experiment, intensity normality method in one of the color space channel and tested the faces using Android based have been developed. The faces multi image datasets came from social media, mobile phone and digital camera. In this experiment, the color space YCbCr percentage value with the image initial value detection before processing are 67.15%, 75.00%, and 64.58% have been reached. Then, after the normalization process are 83.21%, 87.12%, and 80.21% have been increased. Furthermore, this study showed that color space of YCbCr have reached improvement percentage
Volume: 15
Issue: 4
Page: 1895-1900
Publish at: 2017-12-01

Wireless Fault Detection System for an Industrial Robot Based on Statistical Control Chart

10.11591/ijece.v7i6.pp3421-3435
Alaa Abdulhady Jaber , Robert Bicker
Industrial robots are now commonly used in production systems to improve productivity, quality and safety in manufacturing processes. Recent developments involve using robots cooperatively with production line operatives. Regardless of application, there are significant implications for operator safety in the event of a robot malfunction or failure, and the consequent downtime has a significant impact on productivity in manufacturing. Machine healthy monitoring is a type of maintenance inspection technique by which an operational asset is monitored and the data obtained is analysed to detect signs of degradation and thus reducing the maintenance costs. Developments in electronics and computing have opened new horizons in the area of condition monitoring. The aim of using wireless electronic systems is to allow data analysis to be carried out locally at field level and transmitting the results wirelessly to the base station, which as a result will help to overcome the need for wiring and provides an easy and cost-effective sensing technique to detect faults in machines. So, the main focuses of this research is to develop an online and wireless fault detection system for an industrial robot based on statistical control chart approach. An experimental investigation was accomplished using the PUMA 560 robot and vibration signal capturing was adopted, as it responds immediately to manifest itself if any change is appeared in the monitored machine, to extract features related to the robot health conditions. The results indicate the successful detection of faults at the early stages using the key extracted parameters.
Volume: 7
Issue: 6
Page: 3421-3435
Publish at: 2017-12-01

Impacts of Average Power Factor Management Into Sharing System with Discrete Production

10.11591/ijeecs.v8.i3.pp698-699
J. S. Ashwin , N. Manoharan
Electrical frameworks are definitely influenced by power misfortunes, predominantly because of the present moving through lines and transformers. Streams rely on upon end-clients' energy ingestion and are entirely identified with the general power calculate, coming about because of burdens, remunerating units and conveyed era. The powers consider administration affects organize control misfortunes and voltage profiles along conveyance lines. Previously, before the appropriated era dissemination, the system misfortunes minimization could be acquired by requiring a high normal influence element to end-clients, assessing the parameter on the bill time frame. In an unexpected way, these days the power considers administration for dynamic clients is requiring distinctive guidelines, since the past explanation is no longer legitimate. The paper researches irregularities between neighborhood era and present power calculate prerequisites the Italian setting. Contemplations about measuring remunerating gadgets are presented, as per the current advancement of association codes. Misfortunes are analyzed considering diverse reference influence variables, nearby era sum and generators' association topologies. Results are confirmed basing on information from meters introduced in dispersion systems.
Volume: 8
Issue: 3
Page: 698-699
Publish at: 2017-12-01

Decision Support System On Computer Maintenance Management SystemUsing Association Rule and Fisher Exact Test One Side P-Value

10.12928/telkomnika.v15i4.5880
Farid; Universitas Muhammadiyah Gresik, Indonesia Sukmana , Fahrur; STKIP PGRI Tulung Agung, Indonesia Rozi
Decision-makinghas been growth rapidly and many methods can used. Thus, how to apply that methode not only fast but also right. One of implementationdecision making is decision support system in Computer Maintenance Management System (CMMS). This research using data test with Association Rule and Fisher Exact One Side P-Value from same problems in Computer Maintenance Management System (CMMS). Object from this research to get pattern of association between symptom and root cause, to prove relation those variable. Previous research prove any relation between that two variable when use Association Rule and Pearson Chi-Square but many rule must eliminated because not ineligable from Pearson Chi-Square. The meaning of this research to confirm proof of test relation between symptom and root cause in CMMS. And hope with this result of test can make strength hypothesis from previous research.
Volume: 15
Issue: 4
Page: 1841-1851
Publish at: 2017-12-01

Implementation of Cloud connected Smart Plug with Energy Monitoring System

10.11591/ijeecs.v8.i3.pp702-704
C. Chennakesavan
Internet of Things (IoT) is the expansion of web administrations. Employments of new advancements in IoT condition are expanding quickly. A Smart Home is additionally one of the uses of IoT. A Smart Switchboard constrains customer’s execution in watching home settings and controlling home machines. This paper shows an approach to manage the progression of Smart Home applications by consolidating IoT with Web server and Cloud organize. The approach concentrates on: (1) implanting insight into sensors utilizing Energia stage [7]; (2) Creating collaborations with brilliant things utilizing Blynk-Cloud stage; (3) expanding information trade proficiency. At the point when these family unit gadgets in brilliant homes interface with the web utilizing legitimate design, then entire framework can be called as Smart Home in IoT condition or IoT based Smart Homes. Keen Homes contains family unit gadgets/home apparatuses could screen and control remotely. In addition, we execute three cases to show the approach's possibility and productivity, i.e., measuring home conditions, observing electrical machines, and controlling home robotization. 
Volume: 8
Issue: 3
Page: 702-704
Publish at: 2017-12-01

New Waste Material to Enhance the Performance of Grounding System

10.12928/telkomnika.v15i4.7231
Nazatul; National Defence University of Malaysia, Malaysia Shiema Moh Nazar , Suresh; National Defence University of Malaysia, Malaysia Thanakodi , Hazuwan; National Defence University of Malaysia, Malaysia Muhammad
This paper presents the new waste material to enhance the grounding system application by using Rice Straw Ashes as backfill to reduce the grounding resistance of the grounding system. Due to the importance of the grounding system, this paper discussed the effectiveness of the grounding system after using the additive material. The additive material that used are rice straw ash and bagasse ash. The technique that used in this paper is a vertical type because more economical to install. From the result, it was found that depth of electrode and soil treatment has an impact in reducing the grounding resistance. In addition, Rice Straw ashes provide a better grounding performance comparable to Bagasse ashes. 
Volume: 15
Issue: 4
Page: 1530-1539
Publish at: 2017-12-01
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