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28,451 Article Results

Passive Damper Network in a Simple DC Distribution Power System

10.11591/ijece.v8i1.pp544-555
Awang Bin Jusoh , Muhammad Firdaus Abd Razak , Mohamad Hamka Bin Saiful , Tole Sutikno
Distributed power system (DPS) distributes power amongst processing units such as power electronics converters with DC system. Due to the increasing usage of power converters in DPS system, the system becomes unstable and the converter tends to draw constant power needed by the load of the system. Constant power load (CPL) characteristic has negative input impedance that could produce instability problems in the DC bus system. Passive damping network which consists of series RC damping circuit was connected in parallel to the DC bus system with the purpose to reduce the instability. The passive damper was designed, simulated with MATLAB/Simulink and verified experimentally with different values of CPL power levels and input voltage changes. The obtained simulation results show that simple DC system with constant power load was successfully stabilized by the installation of the passive damping network. The experimental set up was also conducted to validate of the proposed technique, and the obtained results were in excellent agreement with the theoretical parts of the project.
Volume: 8
Issue: 1
Page: 544-555
Publish at: 2018-02-01

Concept Drift Identification using Classifier Ensemble Approach

10.11591/ijece.v8i1.pp19-25
Leena Deshpande , M. Narsing Rao
Abstract:-In Internetworking system, the huge amount of data is scattered, generated and processed over the network. The data mining techniques are used to discover the unknown pattern from the underlying data. A traditional classification model is used to classify the data based on past labelled data. However in many current applications, data is increasing in size with fluctuating patterns. Due to this new feature may arrive in the data. It is present in many applications like sensornetwork, banking and telecommunication systems, financial domain, Electricity usage and prices based on its demand and supplyetc .Thus change in data distribution reduces the accuracy of classifying the data. It may discover some patterns as frequent while other patterns tend to disappear and wrongly classify. To mine such data distribution, traditionalclassification techniques may not be suitable as the distribution generating the items can change over time so data from the past may become irrelevant or even false for the current prediction. For handlingsuch varying pattern of data, concept drift mining approach is used to improve the accuracy of classification techniques. In this paper we have proposed ensemble approach for improving the accuracy of classifier. The ensemble classifier is applied on 3 different data sets. We investigated different features for the different chunk of data which is further given to ensemble classifier. We observed the proposed approach improves the accuracy of classifier for different chunks of data.
Volume: 8
Issue: 1
Page: 19-25
Publish at: 2018-02-01

Noise Analysis of Trans-impedance Amplifier (TIA) in Variety Op Amp for use in Visible Light Communication (VLC) System

10.11591/ijece.v8i1.pp159-171
Syifaul Fuada , Angga Pratama Putra , Yulian Aska , Trio Adiono
VLC is a complex system with lots of challenges in its implementation. One of its problems is noise that originated from internal and external sources (sunlight, artificial light, etc). Internal noise is originated from active components of analog front-end (AFE) circuit, which will be discussed in this paper, especially on the trans-impedance amplifier (TIA) domain. The noise characteristics of AFE circuit in VLC system has been analyzed using the variety of available commercial Op Amp and different types of the photodiode (Si, Si-PIN, Si APD). The approach of this research is based on analytical calculus and simulation using MATLAB®. The results of this research show that the main factor that affecting the noise is en, the feedback resistor (Rf), and junction capacitor in the photodiode (Cj). Besides that, the design concept of multi channel TIA (8 channel) using IC Op Amp, with consideration of pin number of each Op Amp, supply needs, the initial value of Rf, converter to 8-DIP and feedback capacitor (Cf) channel, also discussed in this paper.
Volume: 8
Issue: 1
Page: 159-171
Publish at: 2018-02-01

Sukuk Rating Prediction using Voting Ensemble Strategy

10.11591/ijece.v8i1.pp299-303
Mira Kartiwi , Teddy Surya Gunawan , Tika Arundina , Mohd Azmi Omar
Islamic finance development has grown into a focal point in many countries accros the globe. Sukuk, in particular, an Islamic investment product that has received growing attention from sovereigns, multinational and national organizations from both developed and emerging economies. Its uses has been aimed to finance investments in a varieties of economic activities and development projects. Despite the promising look of Sukuk, currently there is lack of studies had been to examine and predict the rating of the Sukuk. As a result, many practitioners adopted the conventional bond hence ignore the fact that these two instruments are different in nature. In order to fill the gap in the literature, it is the aim of this research to develop an ensemble model that can be used to predict Sukuk rating. The effectiveness of the proposed models were evaluated using dataset on Sukuk issuance for domestic from 2006 to 2016. The results indicate that the overall performance of the ensemble model is fall short behind the i duction decision tree (IDT) model. However, the class precision of the ensemble model improved, particularly in predicting the lowest rating of Sukuk.
Volume: 8
Issue: 1
Page: 299-303
Publish at: 2018-02-01

Development of Guiding Cane with Voice Notification for Visually Impaired individuals

10.11591/ijece.v8i1.pp104-112
Emeline C. Guevarra , Marck Ivan Reyes Camama , Geonel Villanueva Cruzado
Navigation in the physical environment is a challenge for those people who have very limited sense of sight or no vision at all. Assistive technologies for blind mobilization is not new and always have a room for improvement. Moreover, these assistive devices are limited in terms of its sensing and feedback abilities. This paper presents a microcontroller-based guiding stick capable of detecting several conditions of the environment such as obstacles in front, left and right positions of the user and detects ascending and descending staircases. The feedback is delivered by an audio output which dictates the direction to go or what condition the sensor detects in front of the user. Technical evaluation proves that the device was functional in terms of its accuracy, responsiveness and correctness. On the other hand, in the actual evaluation of the device with the visually impaired individuals, the device did not perform efficiently. It was also found that the device has the potential to be used effectively by the visually impaired who acquired their blindness in later stage of their life provided that they will have a proper training in using the device while navigating in the physical environment.
Volume: 8
Issue: 1
Page: 104-112
Publish at: 2018-02-01

Embedded System Based Power Plant Monitoring and Controlling

10.11591/ijeecs.v9.i2.pp275-278
J S Ashwin , N Manoharan
An embedded based power plant system is used for checking the environmental condition based on different sensor. The microcontroller is fixed inside the boiler which is a turbine, to monitor the status and the information is passed through GSM. In this project we proposed the main water tank supplies number of boilers. The water level is controlled by a water level sensor, each evaporator has two channels, one is delta other one is outlet and the channels' valves are controlled by some temperature sensors composed in each package. From the GSM modem, the user will get the present status of the boiler level by sending a radiator ID number as message. When the temperature inside the boiler exceed the threshold value it will indicate as a warning to the concerned authority person to take the immediate step.
Volume: 9
Issue: 2
Page: 275-278
Publish at: 2018-02-01

Evaluation of Energy in Wind Turbine System Using Probability Distribution

10.11591/ijeecs.v9.i2.pp294-298
Kalyan Sagar Kadali , L Rajaji
In this work, annual energy output of a variable speed wind turbine is analyzed using annual Weibull wind speed probability distribution function. The power coefficient variety with tip speed proportion in torque control district and pitch point variety for most extreme power yield from wind turbine are examined for distinguishing control framework parameters. The wind turbine power output and variation of power coefficient with tip speed ratio as well as pitch angle are examined / reported using annual Wei bull distribution function. Finally the variation of the estimated annual energy output of the given wind turbine with the mean wind speed is presented.
Volume: 9
Issue: 2
Page: 294-298
Publish at: 2018-02-01

Data Transmission Analysis using MW-5000 at 5.8 GHz Frequency

10.11591/ijece.v8i1.pp254-258
Abu Bakar Ibrahim , Ashardi Abas
In the recent years, the data communication system become the main type of communication in the world. The FSK modulator or demodulator is one of the part that becomes the most important part and extremely advanced with the involvement of microwave active and passive circuits. This paper presents the data transmission analysis using MW-5000 at 5.8 GHz frequency. This experiment use the microwave communication module MW-5000 that is available in electronic laboratory. From this experiment the duration taken for the transmission of data is depend on the length of sentence and the value of baud rate.
Volume: 8
Issue: 1
Page: 254-258
Publish at: 2018-02-01

Moth Flame Optimization Method for Unified Power Quality Conditioner Allocation

10.11591/ijece.v8i1.pp530-537
M. Laxmidevi Ramanaiah , M. Damodar Reddy
This paper introduces a new optimization method to determine the optimal allocation of Unified Power Quality Conditioner (UPQC) in the distribution systems. UPQC is a versatile Custom Power Device (CPD) to solve problems related to voltage and current by the series and shunt compensator in the distribution systems. The task of UPQC highlighted in this paper is the required load reactive power is provided by both the series and shunt compensators. The UPQC’s steady state compensation capability has given a solution for providing reactive power compensation in large distribution systems. The optimization method adopted is Moth Flame Optimization (MFO). The best location and series compensator voltage are determined using MFO. The voltage injected by the series compensator and reactive power injected by the shunt compensator is incorporated in the load flow method. The effectiveness of the proposed method is validated with standard distribution systems.
Volume: 8
Issue: 1
Page: 530-537
Publish at: 2018-02-01

Design and Implement a Hybrid WebRTC Signalling Mechanism for Unidirectional & Bi-directional Video Conferencing

10.11591/ijece.v8i1.pp390-399
Naktal Edan , Ali Al-Sherbaz , Scott Turner
WebRTC (Web Real-Time Communication) is a technology that enables browser-to-browser communication. Therefore, a signalling mechanism must be negotiated to create a connection between peers. The main aim of this paper is to create and implement a WebRTC hybrid signalling mechanism named (WebNSM) for video conferencing based on the Socket.io (API) mechanism and Firefox. WebNSM was designed over a combination of different topologies, such as simplex, star and mesh. Therefore it offers several communications at the same time as one-to-one (unidirectional/bidirectional), one-to-many (unidirectional) and many-to-many (bi-directional) without any downloading or installation. In this paper, WebRTC video conferencing was accomplished via LAN and WAN networks, including the evaluation of resources in WebRTC like bandwidth consumption, CPU performance, memory usage, Quality of Experience (QoE) and maximum links and RTPs calculation. This paper presents a novel signalling mechanism among different users, devices and networks to offer multi-party video conferencing using various topologies at the same time, as well as other typical features such as using the same server, determining room initiator, keeping the communication active even if the initiator or another peer leaves, etc. This scenario highlights the limitations of resources and the use of different topologies for WebRTC video conferencing.
Volume: 8
Issue: 1
Page: 390-399
Publish at: 2018-02-01

Extended FTOPSIS with Distance and Set Theoretic-Based Similarity Measure

10.11591/ijeecs.v9.i2.pp387-394
Nor Hashimah Sulaiman , Daud Mohamad , Jamilah Mohd Shariff , Sharifah Aniza Sayed Ahmad , Kamilah Abdullah
Comparing fuzzy numbers is an essential process in deducing the output of many fuzzy decision making methods. One of the comparison methods commonly used is by using similarity measure. The main advantage of the similarity measure over other approaches is its ability to minimize the loss of information in the computational process. Several similarity measures have been applied effectively in fuzzy decision making methods. In this paper, a new similarity measure based on the geometric distance, the center of gravity, Hausdorf distance and the set theoretic similarity formula known as the Dice similarity index are incorporated into the Extended Fuzzy Technique for Order Preference by Similarity to Ideal Solution (FTOPSIS) method particularly in calculating the closeness coefficients. This similarity measure is in favor of others as it is able to discriminate two similar shape fuzzy numbers effectively with two different locations. A validation process is carried out by implementing the proposed procedure of the Extended FTOPSIS with the new similarity measure in solving a supplier selection problem and the ranking outcome is then compared with the Extended FTOPSIS with other existing similarity measure. The result shows that the Extended FTOPSIS with the proposed similarity measure gives a consistent result without reducing any information in the computational process.
Volume: 9
Issue: 2
Page: 387-394
Publish at: 2018-02-01

Modeling and Simulation of Biaxial Strained P-MOSFETs: Application to a Single and Dual Channel Heterostructure

10.11591/ijece.v8i1.pp421-428
Amine Mohammed Taberkit , Ahlam Guen-Bouazza , Benyounes Bouazza
The objectives of this work are focused on the application of strained silicon on MOSFET transistor. To do this, impact and benefits obtained with the use of strained silicon technology on p-channel MOSFETs are presented. This research attempt to create conventional and two-strained silicon MOSFETs fabricated from the use of TCAD, which is a simulation tool from Silvaco. In our research, two-dimensional simulation of conventional MOSFET, biaxial strained PMOSFET and dual channel strained P-MOSFET has been achieved to extract their characteristics. ATHENA and ATLAS have been used to simulate the process and validate the electronic characteristics. Our results allow showing improvements obtained by comparing the three structures and their characteristics. The maximum of carrier mobility improvement is achieved with percentage of 35.29 % and 70.59 % respectively, by result an improvement in drive current with percentage of 36.54 % and 236.71 %, and reduction of leakage current with percentage of 59.45 % and 82.75 %, the threshold voltage is also enhaced with percentage of: 60 % and 61.4%. Our simulation results highlight the importance of incorporating strain technology in MOSFET transistors.
Volume: 8
Issue: 1
Page: 421-428
Publish at: 2018-02-01

Alternative Methods for Forecasting Variations in Hospital Bed Admission

10.11591/ijeecs.v9.i2.pp410-416
S. Sarifah Radiah Shariff , Mohd Azuan Suhaimi , Siti Meriam Zahari , Zuraidah Derasit
The Malaysian healthcare system is well-being recognized for providing a wide range of access to primary healthcare. The number of hospitals is found to be growing in line with the increase in population. However, over-crowding has become the most common scene that people see in every hospital. The number of  patients being admitted may  somehow  mislead  healthcare planners,  and  thus  causing  them  to  underestimate  the  resources  that  are  required  within  the  hospital. Thus, this study aims to identify better forecasting models for variations in hospital bed admission considering State Space Model (SSM). Data on the admission rate of a state hospital was collected, spanning the period of historical data from 2001 until 2015. The findings indicate that State Space model can outperform common model due to its lower Mean Squared Errors. Female aged between 25 -34 years old are found to be having the highest variation, which could lead to unpredictable in terms of being admitted to hospital.
Volume: 9
Issue: 2
Page: 410-416
Publish at: 2018-02-01

Improvement of Data Security Using Mixcolumn

10.11591/ijeecs.v9.i2.pp361-364
Singh Poja Ramesh , Santhosh Kumar Singh
Advanced Encryption Standard is the security based algorithm used to protect the data from the attackers.In this paper, Optimized Inverse MixColumn transformation has been designed with the help of Xtime multiplication process. Xtime multiplication performs the multiplication function for ‘m X m’ data; results will be m-bit data. Further the complexity of Xtime multiplication process has been identified and re-designed with the help of effective CSE techniques. Developed Reduced Xtime based optimized Inverse MixColumn transformation provide better performances than traditional Xtime based Inverse MixColumn multiplication.
Volume: 9
Issue: 2
Page: 361-364
Publish at: 2018-02-01

Efficient Data Assumption and Optimization of Analog Response Communication Systems

10.11591/ijeecs.v9.i2.pp269-270
Prasanna Moorthi N , V Mathivanan
This paper is focused on the examination of connection between the premier remote reason exactitude of transmission information and qualities for driving edge correspondence structures and straightforward data cesium (AFCS) identified with transmission of signs from fundamental sources. It's displayed that the mean sq. oversight of transmission picks information properties of AFCS. Varieties between the cutoff purposes of AFCS thought of as summed up correspondence channel and their forward channel square measure investigated. The new impacts appearing in incredible AFCS and in DCS working near Shannon's cutoff square measure thought of also. Amid this works advanced and essential correspondence frameworks were thought of with none inclinations and no confirmation that the use of simple cesium is frequently less able than modernized correspondence structures had been given start inside the no in this way far off past. The secured comes about unambiguously showed the capacity of simple data cesium to transmit the signs while not committal to composing with to a little degree rate up to the uttermost ranges of the forward control.
Volume: 9
Issue: 2
Page: 269-270
Publish at: 2018-02-01
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