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31,456 Article Results

Design and implementation DVB-S & DVB-S2 systems

10.11591/ijeecs.v20.i3.pp1444-1452
Samir Jasim Mohammed , Zaid Saadi Hussein
Digital video broadcasting plays an important role in most digital communication systems. Digital broadcasting systems are designed with great accuracy and delicate design which has a major role in our lives today especially digital video broadcasting. It is these systems that are considered to be the most advanced in transmission, reception and reliability. From these systems they develop through the digital video broadcasting project group.The most important are digital video broadcasting of terrestrial, digital video broadcasting of cable and digital video broadcasting of satellite because of that many user's desires to use communications and entertainment in their lives there are new and demanding situations that the standards of these systems can only meet for their own applications .In this paper, it will design and implement the digital video broadcasting of satellite first generation and digital video broadcasting of satellite second generation of binary data,image and audio using Matlab-Simulink environment.In addition, will calculate the bit error rate of the signal. This system is designed with precision to improve performance errors and increase transmission capacity as well as provide a safe environment for information.
Volume: 20
Issue: 3
Page: 1444-1452
Publish at: 2020-12-01

Exploring the curriculum development in content and language integrated learning: A systematic review

10.11591/ijere.v9i4.20705
Lingli Li , Fuquan Huang , Siyu Chen , Leiqiong Pan , Wenjie Zeng , Xiaoqi Wu
Content and language integrated learning (CLIL) is a booming innovation pervading many educational settings. The global spread of CLIL is being practiced in classrooms the world over. Nevertheless, there is still a lack of systematic curricula for CLIL, despite its widespread adoption. Furthermore, the majority of teachers are implementing CLIL without the support of suitable published materials or resource banks. To explore and explain the curriculum development in CLIL, 281 studies from 2009 to 2019 were reviewed systematically, focusing on peer-reviewed English-language journals. We identified studies through using 'Content and Language Integrated Learning' and CLIL as the search terms in the ProQuest Research Library and EBSCOhost databases. Selected articles were organized into five inquiry areas and analyzed thematically, inspired by the curriculum development model proposed by Pawlas and Oliva: 1) CLIL philosophy; 2) CLIL goals; 3) CLIL plan; 4) CLIL implementation; and 5) CLIL evaluation. Based on these themes, Boyer's scholarship of integration was introduced to propose a holistic model for CLIL curriculum development.
Volume: 9
Issue: 4
Page: 1102-1113
Publish at: 2020-12-01

Performance analysis of packed U-cell based inverter-fed five-phase induction motor drive using SINPWM technique

10.11591/ijpeds.v11.i4.pp1899-1907
Ahmed Riyaz , Pradip Kumar Sadhu , Atif Iqbal , Md. Abdullah Ansari
Induction motor is the backbone of current industrial applications. Multiphase machines can handle high power application easily. With the use of five-phase induction motor, advantage of both multi-phase and induction motor can be achieved. This paper presents analysis of five-phase seven level-based Induction motor system fed by packed U-cell based inverter. Modelling of five-phase induction motor is done with the help of mathematical equations using d-q axis transformation. Inverter voltage output comes to be approximately sinusoidal with 18.07% Total Harmonic Distortion (THD). Induction motor with specified parameters is simulated under no-load condition and attains steady state conditions after transient state.
Volume: 11
Issue: 4
Page: 1899-1907
Publish at: 2020-12-01

Islanding detection of distributed generation systems using hybrid technique for multi-machine system

10.11591/ijpeds.v11.i4.pp2046-2054
Sindhura S. Sirige , Sallena Choudhury , Jayalakshmi N. S.
Due to depletion of conventional fuels and increase in power demand, many renewable energy sources are being integrated into the electrical grid. One of the major concerns with this integration of these renewable sources with utility grid is unintentional islanding. Many techniques have been proposed to detect unintentional islanding, all of them trying to comply with the IEEE standard 1547. This paper presents an analysis of the hybrid technique to detect the islanding condition of the power system with multi-machine systems. This work aims at analysing the technique against increasing size of the system with increasing number of distributed generators by including practical voltage unbalance formula. The validity of this detection technique is verified using IEEE standard test power systems in MATLAB platform. This method can be used to identify multiple islanding conditions effectively. The simulation results show the effectiveness of the technique to detect islanding condition for multi-machine systems.
Volume: 11
Issue: 4
Page: 2046-2054
Publish at: 2020-12-01

Automatic recognition of the digital modulation types using the artificial neural networks

10.11591/ijece.v10i6.pp5871-5882
Saad S. Hreshee
As digital communication technologies continue to grow and evolve, applications for this steady development are also growing. This growth has generated a growing need to look for automated methods for recognizing and classifying the digital modulation type used in the communication system, which has an important effect on many civil and military applications. This paper suggests a recognizing system capable of classifying multiple and different types of digital modulation methods (64QAM, 2PSK, 4PSK, 8PSK, 4ASK, 2FSK, 4FSK, 8FSK). This paper focuses on trying to recognize the type of digital modulation using the artificial neural network (ANN) with its complex algorithm to boost the performance and increase the noise immunity of the system. This system succeeded in recognizing all the digital modulation types under the current study without any prior information. The proposed system used 8 signal features that were used to classify these 8 modulation methods. The system succeeded in achieving a recognition ratio of at least 68% for experimental signals on a signal to noise ratio (SNR = 5dB) and 89.1% for experimental signals at (SNR = 10dB) and 91% for experimental signals at (SNR = 15dB) for a channel with Additive White Gaussian Noise (AWGN).
Volume: 10
Issue: 6
Page: 5871-5882
Publish at: 2020-12-01

Exergy analysis of day light using fuzzy logic controllers of Jordanian commercial buildings

10.11591/ijpeds.v11.i4.pp1686-1692
Ali M Baniyounes , Yazeed Ghadi , Mazen Alnabulsi
Saving energy and greenhouse gas emissions in commercial buildings become a very serious request of buildings’ designers and engineering crew. The goal behind the current research is to high light and demonstrate the outcome of utilizing advance and intelligent building management system (IBMS) based in utilizing a fuzzy logic controller that allows the usage and the control of natural light (day light). The fuzzy logic controller (FLC) was sat to control the buildings dimming system while utilizing natural light which normally allows to add outdoors illuminance into the inside ones. This control system is significant mean technique that can be used in intelligent buildings commercial buildings, hence energy savings and consequently, greenhouse gas emissions reduction. The proposed control system relies on enumerating the outdoor and the indoor illuminance and allowing some add-on controllers in order to put into effect a photometric computer that capable of comparing and tasking decisions to regulate rooms lighting fixtures. The article also demonstrates energy savings using this technique and then suggest proper markets for using this controlling system whether during the buildings’ design stage, existing commercial buildings.
Volume: 11
Issue: 4
Page: 1686-1692
Publish at: 2020-12-01

Design, modelling and simulation of controlled sepic DC-DC converter-based genetic algorithm

10.11591/ijpeds.v11.i4.pp2116-2125
Mohammed Omar Ali , Ali Hussein Ahmad
This paper discusses various aspects of a single-ended primary inductance DC-DC converter (SEPIC). The focus is on design, modelling, and simulation results of a SEPIC converter. The study analyses the principle of SEPIC operation when operated in continuous conduction mode (CCM). Additionally, the mathematical equations for the design modules are calculated as per converter requirements. State-space equations are used to formulate the state-space model of the SEPIC converter. To satisfy the best-performance criterion of the system, the parameters for controller (Kp, Ki, Kd) should be tuned or optimized using the genetic algorithm (GA) optimization technique. Controller parameters are determined using an objective function that minimises the integral time absolute error (ITAE). Simulations performed on a closed-loop system reveal that the step response with a PID controlled based GA displayed superior performance. A closed-loop system has a substantially bigger stability region compared to an open-loop system. The simulation optimised performance metrics like maximum overshoot percentage (Mp), rise time (tr), and settling time (ts). MATLAB/Simulink R2018a® and m-file code are used for the system modelling, simulation, and optimization of the PID controller parameters based on the GA.
Volume: 11
Issue: 4
Page: 2116-2125
Publish at: 2020-12-01

Design of high performance DC motor actuated cable driving system for compact devices

10.11591/ijpeds.v11.i2.pp580-593
Chawaphol Direkwatana , Jackrit Suthakorn
The cable transmission is widely used in the remote operation or complex geometry with high stiffness and low backlash. Larger drum is required to reduce and error of transmission in long stroke. An error of the desired position occurs due to the fleet angle while cable winding on a drum. Therefore, a new cable driving module which overcomes this problem is proposed. A new cable driving module with a sliding platform is connected to the actuator unit. A motion of the sliding platform is corresponding to a screw rod connected to an actuator. The precision of the driving system is measured by a high-resolution rotatory encoder and high gear ratio actuator. Results are measured by load and error of the system. A load of system shows a performance of overall translation and rotation of the drum at different speeds. An error of the system is measured from forward and reverse direction by increasing and decreasing the number of turns with constant speed. A system has an average load consumption along a long stroke of cable winding which has no significant problem on the screw platform. Multiple turns have low error value in specific and continuous turn in forward and reverse motion. A new cable driving system is proved in precision movement. The fleet angle is eliminated in new mechanism. Along with a constraint motion, there is no significant change in load consumption. An error is low value in a different direction of movement. Hence, a new design of cable transmission can perform in high performance and small size of the system.
Volume: 11
Issue: 2
Page: 580-593
Publish at: 2020-12-01

Investigation on the BER performance of downlink JT-CoMP-NOMA with different modulation schemes

10.11591/ijeecs.v20.i3.pp1309-1314
Norshidah Katiran , Shaharil Mohd Shah , Noorsaliza Abdullah , Aimi Syamimi Abdul Ghaffar , Faiz Asraf Saparudin
The principle of joint transmission coordinated multipoint with non-orthogonal multiple access (JT-CoMP-NOMA) is to allow multiple cells in the network to cooperatively transmit data to users using the same network resources in frequency and time domains. The approach would be beneficial in enhancing the system performance in the context of spectral efficiency. This paper presents the performance comparison of JT-CoMP-NOMA for several modulation schemes including QPSK, 16-QAM and 64 QAM in downlink transmission in the context of bit error rate. We conduct an investigation to compare the error performance of JT-CoMP-NOMA with NOMA system. Our simulation results demonstrate that the JT-CoMP-NOMA provides lower bit error rate compared to NOMA system.
Volume: 20
Issue: 3
Page: 1309-1314
Publish at: 2020-12-01

A statistical analysis of corpus based approach on learning sentence patterns

10.11591/ijece.v10i6.pp6034-6038
S. Bhargavi , K. Anbazhagan
This research paper examines the adverse effect of theoretical explanation of the grammatical rules among the learners. Exploration of the methods and materials taught inductively or deductively is the panacea to achieve the required goal. The study throws light on the pedagogical implication of adopting appropriate methods and materials for building the learners’ grammar and language. It primarily intends to explore a new teaching method using language corpora that can be employed in the English grammar classes in colleges at the undergraduate level. It strives to evaluate the effectiveness of teaching sentence patterns through corpus based activities comparing with the traditional based teaching. Thus the methodology aims to encourage students to become independent corpus users.
Volume: 10
Issue: 6
Page: 6034-6038
Publish at: 2020-12-01

Mathematical self-concept among prospective teachers

10.11591/ijere.v9i4.20464
Johannis Takaria , Anderson Leonardo Palinussa
Mathematical self-concept (MS-C) is an important construct that prospective mathematics teachers must have in mathematics learning. The aim of the research was to analyze the increase of MS-C of prospective mathematics teachers. The research was quasi-experimental with the design of one group pretest-posttest. The results showed that for prospective teachers, MS-C increased in the medium category while the MS-C indicators achieved in the medium and low categories. The increase of MS-C is due to the effectiveness of collaborative mind mapping (CMM) learning strategy and the process of strengthening MS-C capacity of prospective teachers. The CMM facilitates prospective teachers to construct creative ideas through structured collective ideas that support the increase of MS-C among prospective teacher.
Volume: 9
Issue: 4
Page: 799-806
Publish at: 2020-12-01

A lightweight secure CoAP for IoT-cloud paradigm using elliptic-curve cryptography

10.11591/ijeecs.v20.i3.pp1460-1470
Amrani Ayoub , Rafalia Najat , Abouchabaka Jaafar
Cloud computing and the internet of things (IoT), two different technologies, are already part of our lives. Their impressive adoption increasing more and more, which makes them the future of the future internet. The tsunami of interconnectivity between objects and data collection is increasingly based on Cloud Computing, where data analysis and intelligence really reside. A new paradigm where the Cloud and the IoT are merged will create a new air in the world of technology, which can offer many services and applications useful to humanity. However, despite the great benefits that can bring this technology in term of new services, elasticity and flexibility, the security aspect still remains a serious constraint which hampers the expansion of this technology. This paper proposes a lightweight Mutual authentication protocol based on constrained application protocol (CoAP); that is suitable for IoT device than HTTP and using elliptic curve cryptography to secure data transmission between the Cloud and devices. We used AVISPA tool to verify our proposed scheme.
Volume: 20
Issue: 3
Page: 1460-1470
Publish at: 2020-12-01

Hybrid technique for an efficient PV system through intelligent MPPT and water cooling process

10.11591/ijpeds.v11.i4.pp1835-1843
Hussain Attia , Khaled Hossin
Solar panels have undergone several tests through research studies for the purpose of improving performance to increase the resulting electrical power. This study considers the fact of the necessity of Maximum Power Point Tracking working conditions of the PV panels to harvest maximum electrical power during the weather variations. It considers also the panel temperature reduction which affects positively the panel ability in terms of producing additional electrical power. By this consideration, this study proposes a new design, and simulation results with analysis of a hybrid PV system. The system is able to deliver 5 kW, through the day hours, with less number of PV panels based on a hybrid technique. The proposed technique combines two manipulating processes. The first one guarantees the Maximum Power Point Tracking (MPPT) condition during day hours through an artificial Neural Network (ANN) controller. Whereas the second one focuses on reducing the panel temperature by introducing a water cooler which is designed for this purpose. Simulink software of MATLAB is used to implement and evaluate the proposed system.
Volume: 11
Issue: 4
Page: 1835-1843
Publish at: 2020-12-01

Hybrid unified power quality conditioner for power quality enhancement

10.11591/ijpeds.v11.i4.pp2126-2134
Djellouli Djoudi , Benoudjafer Cherif , Toumi Toufik , Othmane Abdelkhalek
In a low-voltage electrical network, harmonics, reactive power, the current and voltage imbalance, and voltage dips have harmful effects on electrical equipments. To overcome these problems, the hybrid UPQC is proposed. This paper discusses the structure of passive filters, parallel active filters, serial and combines (UPQC) to study the compensation of all types of disturbances likely to appear in the grid. Furthermore, the aim of reducing the size, cost of UPQC is to improve the quality of electric power, making it in compliance with the new regulatory constraints, we proposed the hybrid UPQC which uses passive filters and a combination of active filters. To validate the proposed topology, several sags of source voltage have been applied, at the point of common coupling (PCC). The simulation results from MATLAB/Simulink are discussed to verify the proposed topology.
Volume: 11
Issue: 4
Page: 2126-2134
Publish at: 2020-12-01

Intelligent control of flywheel energy storage system associated with the wind generator for uninterrupted power supply

10.11591/ijpeds.v11.i4.pp2062-2072
Bensaid Amel , Zebirate Soraya , Chaker Abdelkader
Wind energy is currently the fastest-growing energy source in the world. However, the inherent characteristic of intermittent energy production, due to the stochastic nature of wind, still comprises the main drawback of wind power. To avoid such problems, various configurations have been reccomended in order to reduce output power variation. The paper concentrates on performance benefits of adding energy storage system with the wind generator in order to regulate the electric power delivered into the power grid. Compared with other means of energy storage, the flywheel energy storage system (FESS) is the best choice to solve power quality problems. In this paper, a FESS associated to a variable speed wind generation (VSWG) is investigated by presenting two control strategies applied to the storage system equipped with an induction machine; both techniques are studied and developed and consist of a field control (FOC) and a Fuzzy Logic Control (FLC). Simulation model is established in MATLAB/Simulink and comparative results are then reported.
Volume: 11
Issue: 4
Page: 2062-2072
Publish at: 2020-12-01
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