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27,404 Article Results

One Layer Object Separation Algorithm in Binary Image

10.11591/ijeecs.v1.i1.pp215-220
Ratri Dwi Atmaja , Erwin Susanto , Junartho Halomoan , Muhammad Ary Murti
We propose an algorithm to separate black object in binary image. The algorithm is designed to perform vertical separation first, then followed with horizontal separation. This process is done only once (one layer). Results showed that the algorithm potentially could be developed into n-layer separation in a recursive function. The algorithm also potentially could be developed in adaptive to determine when to use a vertical or horizontal separation first. It could be expected to reduce the recursive number.
Volume: 1
Issue: 1
Page: 215-220
Publish at: 2016-01-01

An Adaptive Adjustment Mechanism for Carriage in ATTN Network

10.11591/ijeecs.v1.i1.pp207-214
Yongju Xian , Huailiang Yi , Qili Zhang
Internet based on TCP/IP is now faced with the problem of scalability, security, management and energy consumption, while the patch to Internet doesn’t solve the drawback of IP network essentially, which further intensifies the complexity of the network. In this paper, based on the research of ATTN network, an adaptive adjustment mechanism is proposed aiming at the problem of data retention and low resource utilization rate in the automatic configuration of the carriages. In which by the forecast of data retention and resource utilization, the carrier routes are dynamically adjusted. Finally, the scheme is further optimized, and tested on ATTN simulation platform, which shows the performance of ATTN network is improved.
Volume: 1
Issue: 1
Page: 207-214
Publish at: 2016-01-01

Design and Fabrication of LC-Oscillator Tool Kits Based Op-Amp for Engineering Education Purpose

10.11591/ijeecs.v1.i1.pp88-100
Syifaul Fuada , Hakkun Elmunsyah , Suwasono Suwasono
In this paper, a proposed design, fabrication and testing of sine wave oscillator “LC” type (Hartley and Colpitts oscillator) has been performed using five approaches. The first approach proposed design is done theoretically using the basic theorems used to generate oscillations, such as the condition of oscillation criteria and determine the values of capacitor (C) and inductor (L) component, Secondly it is done using simulation technique (LTSpice IV), Thirdly the simulated design is implemented practically using IC OP-AMP 741 with passive elements such as resistors, capacitors and inductors by oscilloscope and frequency generator. Fourthly design the Hartley and colpitts tool kit by 2-D and 3-D, layouting the circuit by Eagle PCB design software then package into tool box which integrated each other. Finaly, the LC-oscillator tool kit was tested such as resistor, capasitor and inductor module and write the result into tables (for jobsheet data).
Volume: 1
Issue: 1
Page: 88-100
Publish at: 2016-01-01

A Review on Development and Operational Strategy of Fault Current Limiters

10.11591/ijeecs.v1.i1.pp1-9
S.P. Janani Priyadharshna , T. Venkatesan
Distributed Generation (DG) plays a major role in existing power system. When such distributed generation system is interconnected with micro-grid improves voltage profile, power quality but at the same time results in fault conditions. Among various faults occurring in the power system, short circuit faults are the most predominant case. This results in the increase in flow of the fault current in the line. Also the equipments installed in such a line get damaged internally due to flow of excess fault current. Therefore in order to improve the transient conditions and limit the fault current to a manageable level, a device called Fault Current Limiters (FCLs) are being used in recent trend. This paper reviews about various fault current limiters, their development, characteristics and operating performance in the system. It gives a detailed knowledge about various operations performed by fault current limiters that is compared with other conventional techniques.
Volume: 1
Issue: 1
Page: 1-9
Publish at: 2016-01-01

Fairness Evaluation and Comparison of Current Congestion Control Techniques.

10.11591/ijeecs.v1.i1.pp176-181
Usman Ahmad , Md Asri Bin Ngadi , Ismail Fauzi Bin Isnin
Transmission Control Protocol (TCP) is used by many applications on the Internet for the reliable data transmission. TCP does not able to utilize the available link bandwidth quickly and efficiently in High bandwidth short distance (HBSD) and high bandwidth long distance (HBLD) networks. Many congestion control techniques also known as TCP variants are developed to solve these problems in different network environments. In this paper an experimental analysis is done for the performance evaluation of TCP CUBIC, TCP Compound, TCP Reno and High speed TCP in term of Inter and Intra Protocol fairness by using Network Simulator 2 (NS-2). Results show that the performance of TCP CUBIC pathetically down and TCP Compound and TCP Reno shows good performance in term of protocol fairness. However, these congestion control techniques still need more improvement for the utilization of available link bandwidth in HBLD networks and other network resources.
Volume: 1
Issue: 1
Page: 176-181
Publish at: 2016-01-01

A New Approach of Detection Algorithm for Reducing Computation Complexity of MIMO systems

10.11591/ijeecs.v1.i1.pp159-167
Mohammed Qasim Sulttan
Multiple-Input Multiple-Output (MIMO) technique is a key technology to strengthen and achieve high-speed and high-throughput wireless communications. . In recent years, it was observed that frequent detecting techniques could improve the performance (e.g., symbol error rate ‘SER’) of different modern digital communication systems. But these systems faced a problem of high complexity for the practical implementation.  To solve the problem of high complexity, this work proposed Frequent Improve K-best Sphere Decoding (FIKSD) algorithm with stopping rule depending on the Manhattan metric. Manhattan metric is proposed to use with FIKSD in order to achieve the lowest complexity. FIKSD is a powerful tool to achieve a high performance close to the maximum likelihood (ML), with less complexity. The simulation results show a good reduction in computation complexity with a cost of slight performance degradation within 1dB; the proposed FIKSD requires 0% to 94% and 82% to 97% less complexity than Improved K-best Sphere Decoder (IKSD) and K-best Sphere Decoder (KSD) respectively. This makes the algorithm more suitable for implementation in wireless communication systems.
Volume: 1
Issue: 1
Page: 159-167
Publish at: 2016-01-01

Electrical Vehicle Modeling and Backstepping Control

10.11591/ijeecs.v1.i1.pp60-70
Mekkaoui Mohammed , Zemalache Meguenni Kada , Omari Abdel Hafid , Lotfi Motefai
Nowadays, the development of electric vehicles has become a general trend. Electrical vehicles have improved their performance, and have been made suitable for commercial and domestic use during the last decades. The proportional–integral–differential (PID) controller has been widely used in the industrial field. It has a simple structure, and can be easily realized. The recursive backstepping design methodology is originally introduced inadaptive control theory to systematically construct the feedback control law, the parameter adaptation law and the associated Lyapunov function for a class of nonlinear systems satisfying certain structured properties. the backstepping control (BKC)  is used to improve the robustness and real-time performance of the electrical vehicle system. Numerical simulation results show the effectiveness of this approach.
Volume: 1
Issue: 1
Page: 60-70
Publish at: 2016-01-01

Bit Error Rate Analysis of MC-CDMA Systems with Channel Identification Using Higher Order Cumulants

10.11591/ijeecs.v1.i1.pp138-152
Mohammed Zidane , Said Safi , Mohamed Sabri , Ahmed Boumezzough
The aim of this paper is to contribute to study the problems of the blind identification and equalization using Higher Order Cumulants (HOC) in downlink Multi-Carrier Code Division Multiple Access (MC-CDMA) systems. For this problem, two blind algorithms based on HOC for Broadband Radio Access Network (BRAN) channel are proposed. In the one hand, to assess the performance of these approaches to identify the parameters of non minimum phase channels, we have considered two theoretical channels, and one practical frequency selective fading channel called BRAN C, driven by non gaussian signal. In the other hand, we use the Minimum Mean Square Error (MMSE) equalizer technique after the channel identification to correct the channel distortion. Theoretical analysis and numerical simulation results, in noisy environment and for different signal to noise ratio (SNR), are presented to illustrate the performance of the proposed methods.
Volume: 1
Issue: 1
Page: 138-152
Publish at: 2016-01-01

Comparison of OFDM System in terms of BER using Different Transform and Channel Coding

10.11591/ijeecs.v1.i1.pp153-158
Pratima Manhas , M.K Soni
Orthogonal frequency division multiplexing is a type of multicarrier modulation technique which is used in wireless communication. OFDM can be used in various wireless and wired application such Digital audio broadcasting, digital video broadcasting & wireless LAN. The Performance of OFDM system depends on various parameters such as using different transform, different modulation and by putting various channel coding. In this paper OFDM system is modeled by using different transform (DWT/FFT), different modulation (BPSK, QPSK, QAM) and different channel coding (Linear / Cyclic block codes) for AWGN channel. The performance parameter is calculated as Bit error rate (BER) for various transform/modulation/channel coding based OFDM systems. MATLAB Simulink tool is used to calculate the bit error rate (BER).
Volume: 1
Issue: 1
Page: 153-158
Publish at: 2016-01-01

Scattering Parameters prediction for 433MHz SAWR with Minimum Insertion loss

10.11591/ijeecs.v1.i1.pp78-87
M. M. Elsherbini , M. F. Elkordy , A. M. Gomaa
A proposed schematic design for surface acoustic wave resonator (SAWR) is introduced in this paper. A simplified equivalent model for both one and two port 433MHz SAWR is built. Scattering parameters of the proposed design is extracted and compared with a commercial one of the same resonant frequency. Advanced system design tool is nominated to give the main parameters like Impedance and Admittance with their real and imaginary response. The insertion loss predicted mathematically and recorded from simulation then compared with the measured value. The proposed design tool introduced adequate results with minimum hardware procedure specifications.
Volume: 1
Issue: 1
Page: 78-87
Publish at: 2016-01-01

Notice of Retraction Power Transformer Incipient Faults Diagnosis Based on Dissolved Gas Analysis

10.11591/ijeecs.v1.i1.pp10-16
Osama E. Gouda , Saber M. Saleh , Salah Hamdy El-hoshy
Notice of Retraction-----------------------------------------------------------------------After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IAES's Publication Principles.We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.The presenting author of this paper has the option to appeal this decision by contacting info@iaesjournal.com.-----------------------------------------------------------------------Incipient fault diagnosis of a power transformer is greatly influenced by the condition assessment of its insulation system oil and/or paper insulation. Dissolved gas-in-oil analysis (DGA) is one of the most powerfull techniques for the detection of incipient fault condition within oil-immersed transformers. The transformer data has been analyzed using key gases, Doernenburg, Roger, IEC and Duval triangle techniques. This paper introduce a MATLAB program to help in unification DGA interpretation techniques to investigate the accuracy of these techniques in interpreting the transformer condition and to provide the best suggestion for the type of the fault within the transformer based on fault percentage. It proposes a proper maintenance action based on DGA results which is useful for planning an appropriate maintenance strategy to keep the power transformer in acceptable condition. The evaluation is carried out on DGA data obtained from 352 oil samples has been summarized  into 46 samples that have been collected from a 38 different transformers of different rating and different life span.
Volume: 1
Issue: 1
Page: 10-16
Publish at: 2016-01-01

Design and Implementation of Robust Controllers for an Intelligent Incubation Pisciculture System

10.11591/ijeecs.v1.i1.pp101-108
D. Ganesh , S.MD. Saleem Naveed , M. Kalyan Chakravarthi
Aquaculture is major occupation for the humans living at coastal areas. The fresh water cultivation of the certain species is prominent in tropical and sub-tropical climates. Here the proposed work shows the relation-ship between the growth of the certain species of marine habitats and the factors affecting their growth with respect to the medium of their living. Advancement of embedded systems in aquaculture leads to new innovations of monitoring and controlling the various parameters. Here the embedded system based application is used, through which the monitoring and controlling of the light is done with the help of LabVIEW based PI controller as well as Fuzzy controller for the effective and healthy growth of the marine habitat. The Designed controllers are energy efficient based controller for controlling the Light Source (LS) via appropriate lighting control levels. The controlling and managing of the system is based on the present light intensity with the help of virtual controller. The proposed work involves the designing and implementation of PI controller and the fuzzy controller for the real time setup to monitor and control the process for optimal and feasible solution.
Volume: 1
Issue: 1
Page: 101-108
Publish at: 2016-01-01

On the Impact of Timer Resolution in the Efficiency Optimization of Synchronous Buck Converters

10.11591/ijpeds.v6.i4.pp693-702
Pedro Amaral , Cândido Duarte , Pedro Costa
Excessive dead time in complementary switches causes significant energy losses in DC-DC power conversion. The optimization of dead time prevents the degradation of overall efficiency by minimizing the body diode conduction of power switches and, as a consequence, also reduces reverse recovery losses. The present work aims at analyzing the influence of one of the most important characteristics of a digital controller, the timer resolution, in the context of dead-time optimization for synchronous buck converters. In specific, the analysis quantifies the efficiency de-pendency on the timer resolution, in a parameter set that comprises duty-cycle and dead-time, and also converter frequency and analog-to-digital converter accuracy. Based on a sensorless optimization strategy, the relationship between all these limiting factors is described, such as the number of bits of timer and analog-to-digital converter. To validate our approach experimental results are provided using a 12-to-1.8V DC-DC converter, controlled by low- and high-resolution pulse-width modulation signals generated with an XMC4200 microcontroller from Infineon Technologies. The measured results are consistent with our analysis, which predicts the power efficiency improvements not only with a fixed dead time approach, but also with the increment of timer resolution.
Volume: 6
Issue: 4
Page: 693-702
Publish at: 2015-12-01

Performance Measurement of a Compact Generator - Hydro Turbine System

10.11591/ijece.v5i6.pp1252-1261
Pudji Irasari , Priyono Sutikno , Puji Widiyanto , Qidun Maulana
This study aims to investigate the characteristic of a compact generator – hydro turbine system. The generator is of permanent magnet type and the turbine operates in a very low head. The integration of the two components is conducted in such a way that simplifies the construction of the conventional turbine generator. The method is by mounting the generator stator to the turbine casing and the permanent magnets are assembled in the perimeter of the turbine blade rotor. This simple construction is approached by making the stator from individual teeth and yoke. The permanent magnet generator (PMG) is designed to produce the nominal power of 300 Watt 50 Hz at 83 rpm of turbine shaft. All components of the integrated turbine- generator are totally immersed in the water stream. The stator has to be hermitic to avoid water entering the spool. Another issue investigated is the influence of the type of the stator inner casing material to the generator performance. The results show, the PVC material for inner casing has a good influence to the generator performance compared with the mild steel material.
Volume: 5
Issue: 6
Page: 1252-1261
Publish at: 2015-12-01

Ohmic Contact characterization Using Image Processing

10.11591/ijece.v5i6.pp1347-1353
Shashikala B.N. , Nagabhushana B.S.
The Ti/Al/Ni/Au films deposited by electron beam evaporation on n type GaN was demonstrated as a suitable solution for low resistive and thermally stable contact to n-type GaN. The surface morphology of Ti/Al/Ni/Au and Ti/Al contacts were studied as a function of the annealing process conditions using image processing techniques. The algorithm was implemented using the MATLAB software. Using the algorithm made, the area occupied by the pores and porosity in the ohmic contact structures were obtained.
Volume: 5
Issue: 6
Page: 1347-1353
Publish at: 2015-12-01
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