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29,905 Article Results

An efficient two-stage user association scheme for green C-RAN systems

10.11591/ijeecs.v16.i2.pp794-802
Ismail Hburi , H. F. Khazaal
This paper addresses the energy efficiency (EE) based user-association problem in cloud radio-access network. In specific, a low-complexity 2-stage iterative algorithm is developed for this purpose by jointly employing the coordinated multi-point (CoMP) and user-clustering techniques. The first stage of the algorithm applies a greedy search to form user-cluster and activate corresponded remote radio heads (RRHs) for CoMP transmission, only an RRH j with good channel gain could be included in the serving cluster of user k. Next, in the second stage, a re-clustering procedure is utilized to mitigate inter-cluster interference (ICI) and assign optimal power for scheduled users. Our obtained findings confirm that the transmit power, RRH density, and the number of users served by these RRHs can significantly affect the EE. Also, the results show that under certain system settings the proposed scheme can enhance the EE by almost 39.6% compared to conventional CoMP without user clustering technique.
Volume: 16
Issue: 2
Page: 794-802
Publish at: 2019-11-01

Obstacle aware delay optimized rectilinear steiner minimum tree routing

10.11591/ijeecs.v16.i2.pp640-652
Shyamala G , G R Prasad
This work presents a method to solve the problem of constructing Rectilinear Steiner Minimum Tree (RSMT) for a group of pins in the presence of obstacles. In modern very large-scale integrated circuit (VLSI) designs, the obstacles, generally blocks the metal and the device layer. Therefore routing on top of blockage is a possible solution but buffers cannot be placed over the obstacle. Modern VLSI design OARSMT construction has long wire length, which results in signal violation. To address this issue a slew constraint interconnect need to be considered in routing over obstacle. This is called the Obstacle-Avoiding Rectilinear Steiner minimum trees (OARSMT) problem with slew constraints over obstacles. The drawback of traditional OARSMT is that they only consider slew constraint, and delay constraints are neglected. It induces high routing resources overhead due to buffer insertion and does not solve global routing solution. This work presents an Obstacle Aware Delay Optimized Rectilinear Steiner Minimum Tree (OADORSMT) Routing to address the delay, slew constraint and reduce the routing resources. Experiments are conduced to evaluate the performance of proposed approach over existing approach in term of wire length and worst negative slack. The experiments are conducted for small and large nets considering fixed and varied obstacles and outcome shows the proposed efficiency over existing approaches. The OADORSMT is designed in such a way where it can be parallelized to obtain better efficiency.
Volume: 16
Issue: 2
Page: 640-652
Publish at: 2019-11-01

Modelling emotion expression through agent oriented methodology

10.11591/ijeecs.v16.i2.pp972-977
S.Filzah Zulkifli , CW Shiang , N Jali , M.A. Khairuddin
This paper presents Modelling Emotion Expression through Agent Oriented Methodology. Considering emotions of the intended users in the software engineering can uncover new requirements to improve and more accepted the system. While emotion is paying much attention nowadays, there is lacking systematic way to model the emotion based system. Without the systematic approach, it is hard to debug, design and develop an emotion based system. Since the emotional requirement of people has not being fully investigated, the research outcome propose the emotion modelling as part of the complete set of agent-oriented modelling for virtual character in eLearning system, The contribution of this paper is to introduce agent oriented modelling to systematic model an emotion based solution for an eLearning system and instructional video design. With the emotion model, it can serve as a guide to design, redesign, and discuss the emotion elements among the software development team. This is important for better debugging and project management especially for emotion led system.
Volume: 16
Issue: 2
Page: 972-977
Publish at: 2019-11-01

Optimal sizing and location of multiple distributed generation for power loss minimization using genetic algorithm

10.11591/ijeecs.v16.i2.pp956-963
Abdulhamid Musa , Tengku Juhana Tengku Hashim
This paper presents a Genetic Algorithm (GA) for optimal location and sizing of multiple distributed generation (DG) for loss minimization. The study is implemented on a 33-bus radial distribution system to optimally allocate different numbers of DGs through the minimization of total active power losses and voltage deviation at power constraints of 0 – 2 MW and 0 – 3 MW respectively. The study proposed a PQ model of DG and Direct Load Flow (DLF) technique that uses Bus Incidence to Branch current (BIBC) and Branch Current to Bus Voltage (BCBV) matrices. The result obtained a minimum base case voltage level of 0.9898 p.u at bus 18 with variations of voltage improvements at other buses after single and multiple DG allocations in the system. Besides, the total power loss before DG allocation is observed as 0.2243 MW, and total power loss after DG allocation was determined based on the power constraints. Various optimal locations were seen depending on the power limits of different DG sizes. The results have shown that the impact of optimal allocation and sizing of three DG is more advantageous concerning voltage improvement, reduction of the voltage deviation and also total power loss in the distribution system. The results obtained in the 0 – 2 MW power limit is consistent to the 0 – 3 MW power limits regarding the influence of allocating DG to the network and minimization of total power losses.
Volume: 16
Issue: 2
Page: 956-963
Publish at: 2019-11-01

Neuro-physiological porn addiction detection using machine learning approach

10.11591/ijeecs.v16.i2.pp964-971
Norhaslinda Kamaruddin , Abdul Wahab , Yasmeen Rozaidi
Pornography is a portrayal of sexual subject contents for the exclusive purpose of sexual arousal that can lead to addiction. The availability and easy accessibility of the Internet connectivity have created unprecedented opportunities for sexual education, learning, and growth for adolescences to be in the rise. Hence, the risk of porn addiction developed by teenagers has also increased due to highly prevalent porn consumption. To date, the only available means of detecting porn addiction is through questionnaire. However, while answering the questions, participants may suppress or exaggerate their answers because porn addiction is considered taboo in the community. Hence, the purpose of this project is to develop an engine with multiple classifiers to recognize porn addiction using electroencephalography (EEG) signals and to compare classifiers performance. In the experimental study, the neuro-physiological signals of EEG data were collected previously in Indonesia among students age 9 to 13 years old by researchers from the International Islamic University Malaysia (IIUM). The EEG data were pre-processed, and relevant features are extracted using Mel-Frequency Cepstral Coefficients (MFCC). Then, the features are classified to produce the outputs of valance and arousal. Subsequently, three different classifiers of Multilayer Perceptron (MLP), Naive Bayesian (NB), and Random Forest (RF) are employed to determine whether the participant is a porn addict or otherwise. The experimental results show that the MLP classifier yields slightly better accuracy compared to Naïve Bayes and Random Forest classifiers making the MLP classifier preferable for porn addiction recognition. Although this work is still at infancy stage, it is envisaged for the work to be expanded for comprehensive porn addiction recognition system so that early intervention and appropriate support can be given for the teenagers with pornography addiction problem.
Volume: 16
Issue: 2
Page: 964-971
Publish at: 2019-11-01

Evaluation review of effectiveness and security metrics performance on information technology domain

10.11591/ijeecs.v16.i2.pp1059-1064
Roshidi Din , Rosmadi Bakar , Azizan Ismail , Aida Mustapha , Sunariya Utama
Information Technology (IT) development is the vital required for human life activities in this global era. This implementation of IT system has becomes competitive among developers to increase the quality of system performance. In order to discover the IT performance of system, it neccesary to evaluate the IT implementation performance. It determines the anticipated system output to prepare to enhance the application performance. In this paper the evaluation performance that is reviewd are effectiveness and security metrics because both of evaluations able to improve the development and protection of system. Therefore, this paper classifies some IT domain development that used in term of effectiveness and security metric approach from previous researchers’ effort. It is categorized the domain based on both evaluation term of effectiveness and security metrics from specific parameter their used. The concern of this paper is to discover the important effectiveness and security metrics in IT domain performance that is anticipated to achieve expected performance.
Volume: 16
Issue: 2
Page: 1059-1064
Publish at: 2019-11-01

Traffic-based floor preference for the scheduling of elevators in elevator group control system

10.11591/ijeecs.v16.i2.pp835-842
Malan Dipak Sale , V. Chandra Prakash
Modern high-rise buildings require complex yet efficient Elevator Group Control Systems (EGCSs). In vertical transportation through an elevator, a passenger must make a hall call by pressing a landing call button installed at each floor and located near the cars of the elevator group. Conventionally, the EGCS allocates one of the cars for each hall call. Waiting time for the arrival of car and journey time inside a car are two parameters, which provide a suitable measure for quality and efficiency of EGCSs. The proposed system deals with this car-call allocation problem. The proposed work analyzes the generated traffic patterns to dispatch a certain number of cars to certain floors in order to reduce overall wait time of passengers. The proposed algorithm is simulated for high-rise building with 20 floors and provides a better result with the reduced wait time for more number of passengers.
Volume: 16
Issue: 2
Page: 835-842
Publish at: 2019-11-01

A review on various methods of collaborative computing

10.11591/ijeecs.v16.i2.pp1002-1008
Mohd Afiq Bin Zamanhuri , Zalilah Abd Aziz , Rose Hafsah Abd Rauf , Elly Johana Johan , Noratikah Shamsudin
Currently, mosques in Malaysia distribute their lecture schedules either on paper-based form or by uploading the schedule on their social media platform. This has some disadvantages such as paper schedules are susceptible to damages and information on social media platform is often not updated to current changes. Collaborative Computing is a system that enable individuals to work together remotely by making use of the reach ability of the internet. In order to utilise the Internet’s obvious advantages over paper-based and rapid information distribution and asynchronous communication, a review is conducted to study the available methods of collaborative computing, further analyse current research papers. Result shows that Centralized Computing method is the most suitable method for developing collaborative mobile application for Islamic Lectures schedule.
Volume: 16
Issue: 2
Page: 1002-1008
Publish at: 2019-11-01

Simulation hedge investment portfolios through options portfolio

10.11591/ijeecs.v16.i2.pp843-847
Miguel Jiménez-Gómez , Natalia Acevedo-Prins , Miguel David Rojas-López
This paper presents two hedging strategies with financial options to mitigate the market risk associated with the future purchase of investment portfolios that exhibit the same behavior as Colombia's COLCAP stock index. The first strategy consists in the purchase of a Call plain vanilla option and the second strategy in the purchase of a Call option and the sale of a Call option. The second strategy corresponds to a portfolio of options called Bull Call Spread. To determine the benefits of hedging and the best strategy, the Geometric Brownian Motion and Monte Carlo simulation is used. The results show that the two hedging strategies manage to mitigate market risk and the best strategy is the first one despite the fact that the Bull Call Spread strategy is lower cost.
Volume: 16
Issue: 2
Page: 843-847
Publish at: 2019-11-01

Transient stability enhancement of statcom integration in power grid

10.11591/ijeecs.v16.i2.pp553-561
I. A Ethmane , A.K. Mahmoud , M. Maaroufi , A. Yahfdhou
To solve load growth of a hybrid existing electrical system, we at first build generation stations (wind, solar or thermical). And secondly in 2025 year, when the system is so meshed, some buses will be very far from production energy, the transits power will be lower than the transmission capacity, and the voltage drop out margin limit of stability. Therefore it is proposed to install Flexible AC Transmission System (FACTS) devices to enhance the transient power stability and quality in the power system. The power flow analysis of Newton Raphson method is performed on a seven (7) bus system with and without static synchronous compensator (STATCOM). The STATCOM is a shunt connected FACTS devices that are useful for reactive power compensation and mitigation of power quality problems in transmission and distribution systems. These investigations indicate the need of power flow analysis and determine best locations of STATCOM on the proposed system. The results of simulation have been programmed in MATLAB and PSS/E Simulator. In the end the expected disturbances and the power quality enhancement of the network in the horizon 2025 were attenuated by integration of STATCOM that is able to supply or absorb reactive power and to maintain the voltage at 1pu.
Volume: 16
Issue: 2
Page: 553-561
Publish at: 2019-11-01

Feedback-feedforward fuzzy logic approach for temperature control in bioethanol vacuum distiller

10.11591/ijeecs.v16.i2.pp678-684
Muhammad Aziz Muslim , Tegar Sukma Yudha , B.S.K.K. Ibrahim
Energy conservation and diversification are becoming a major research issue. Awareness of the limited sources of energy from fossil fuels encourages research on renewable energy. Bioethanol is a promising fuel substitute for gasoline. Bioethanol processing includes sugar extraction, fermentation, distillation, and absorption. Temperature and pressure controls are essential in bioethanol processing. This paper presents a feedback-feedforward fuzzy logic approach for temperature control in a bioethanol vacuum distiller. In this study, vacuum pressure is employed as feedforward inputs for a fuzzy logic controller. The feedforward input directly modifies the main controller, i.e., fuzzy logic controller, through fuzzy rules. The controller is implemented using Arduino Mega 2560 microcontroller. The results show that the proposed feedback-feedforward fuzzy logic controller could successfully maintain the temperature at the desired setpoint value with small steady-state error (3.85%) and relatively shorter settling time compared to classical PID controller and fuzzy logic controller.
Volume: 16
Issue: 2
Page: 678-684
Publish at: 2019-11-01

Improved newton-raphson with schur complement methods for load flow analysis

10.11591/ijeecs.v16.i2.pp699-605
Lea Tien Tay , William Ong Chew Fen , Lilik Jamilatul Awalin
The determination of power and voltage in the power load flow for the purpose of design and operation of the power system is very crucial in the assessment of actual or predicted generation and load conditions. The load flow studies are of the utmost importance and the analysis has been carried out by computer programming to obtain accurate results within a very short period through a simple and convenient way. In this paper, Newton-Raphson method which is the most common, widely-used and reliable algorithm of load flow analysis is further revised and modified to improve the speed and the simplicity of the algorithm. There are 4 Newton-Raphson algorithms carried out, namely Newton-Raphson, Newton-Raphson constant Jacobian, Newton-Raphson Schur Complement and Newton-Raphson Schur Complement constant Jacobian. All the methods are implemented on IEEE 14-, 30-, 57- and 118-bus system for comparative analysis using MATLAB programming. The simulation results are then compared for assessment using measurement parameter of computation time and convergence rate. Newton-Raphson Schur Complement constant Jacobian requires the shortest computational time.
Volume: 16
Issue: 2
Page: 699-605
Publish at: 2019-11-01

Projective synchronization for a cass of 6-D hyperchaotic lorenz system

10.11591/ijeecs.v16.i2.pp692-700
Ahmed S. Al-Obeidi , Saad Fawzi AL-Azzawi
This paper is concerned with the projective synchronization problem for a class of 6-D nonlinear dynamical system which is called hyperchaotic Lorenz system when the parameters of this system are unknown. Based on scaling factor  which belong to above strategy, four controller are proposed to achieve projective synchronization between two identical systems via using Lyapunov's direct method and nonlinear control strategy.  These scaling factor taken the values, and 2 for each control respectively. A numerical simulations are used to demonstrate the efficiency of the proposed controller.
Volume: 16
Issue: 2
Page: 692-700
Publish at: 2019-11-01

Short term load forecast of Kano zone using artificial intelligent techniques

10.11591/ijeecs.v16.i2.pp562-567
Huzaimu Lawal Imam , M.S Gaya , G. S. M Galadanci
Load forecast provides useful information for effective electricity dispatch, planning for future expansion and significantly enhances operational efficiency. Conventional techniques yield unsatisfactory forecast which results in high energy losses and in turn leads to high operational cost and suppressed electricity demand. This paper presents hybrid neuro fuzzy (HNF) and Nonlinear Auto-Regressive with eXogeneous input (NARX) neural network for the short term load prediction of Kano region Nigeria.  Simulation results obtained demonstrated the generalization capabilities of the models in predicting the load accurately well by achieving MAPE of 0.025% and 0.6551% for the HNF model and NARX network model respectively. The models could serve as promising tool for predicting Kano Zone load demand.
Volume: 16
Issue: 2
Page: 562-567
Publish at: 2019-11-01

PAPR analysis of OFDM system using AI based multiple signal representation methods

10.12928/telkomnika.v17i6.11511
Jyoti; Mewar University Shukla , Alok; Jaypee Institute of Information Technology Joshi , Rajesh; SRM University Tyagi
OFDM (orthogonal frequency division multiplexing) is widely used in 4th generation applications owing to its robustness in fading environments. The major issues with OFDM systems is the high PAPR (peak-to-average power ratio) of the transmitted signals, it leads to in and out of band distortion. SLM (selective mapping) and PTS (partial transmit sequence) are two key methods for PAPR reduction. Both the methods require exhaustive searching of phase factors to optimize the PAPR, these searches lead to high computational complexity. This paper discusses using optimization based PAPR reduction methods which an be used with PTS for the reduction of computational complexity and search space. In this paper we have analyzed PTS and SLM with particle swarm optimization (PSO), Artificial Bee Colony (ABC) and differential evolution (DE). PAPR and BER (bit error rate) comparison is done for both the cases.
Volume: 17
Issue: 6
Page: 2983-2991
Publish at: 2019-11-01
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