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29,922 Article Results

Towards design strong emergency and COVID-19 authentication scheme in VANET

10.11591/ijeecs.v21.i3.pp1808-1819
Akeel kassim leaby , A. Yassin , Mushtaq Hasson , Abdullah Rashid
The wide use of vehicular ad hoc networks (VANETs) in the last decade hasled many researchers to find  efficient and reliable methods to obtain the desired benefits and offer services, such as healthcare and traffic management. However, VANETs suffer from security issues represented by authentication and data integrity. In thispaper, we propose a robust  mutual authentication scheme based on elliptic curve cryptography (ECC), cryptography hash function, and a pseudonym. The  proposed work was twofold in focus: first, on healthcare in emergency cars which use VANETs, and second, on overcoming security issues, such as resisting familiar attacks (e.g. insider attacks and reply attacks). Because of the serious situation generated by the worldwide outbreak of the Covid-19 epidemic, we also found this research valuable in supporting global efforts to combat the rapid spread of this virus, by finding the safest and fastest routes to epidemic treatment centres for medical staff, assistance teams in medical  operations, fumigation control, and all work teams associated with disease control. This research attempts to contribute by proposing a special signal  used to define epidemic teams. The best route, fast route can be chosen by using VANETs infrastructure. This scheme also deals with metric security features, such as key management, data integrity, and data privacy. In the communication and computation  cost, we  noticed  that our proposed scheme  achieved  good results compared with the related works.
Volume: 21
Issue: 3
Page: 1808-1819
Publish at: 2021-03-01

Simulation and manufacturing of modified circular monopole microstrip antenna for UWB applications

10.11591/ijaas.v10.i1.pp70-78
Bilal S. Taha , Hamzah M. Marhoon
Ultra-wideband (UWB) technology is one of the most promising wireless communication solutions to be developed quickly because of the high-speed data, wide bandwidth and excellent immunity to multipath interference. In this work, the compact design of a modified circular monopole microstrip antenna is simulated and manufactured for the UWB applications. The simulation process of the proposed antenna was done based on the finite integration of the computer simulation technology (CST) microwave studio (MWS). The proposed antenna comprises a copper radiating patch, Roger’s Kappa-438 substrate, and a single stub act as a reflector. The simulation results showed a reasonable agreement with the results of the measurement and good performance was achieved in the range from 1.8 to 10 GHz with VSWR less than 2.0.
Volume: 10
Issue: 1
Page: 70-78
Publish at: 2021-03-01

Current mode control of single phase grid tie inverter with anti-islanding

10.11591/ijpeds.v12.i1.pp241-248
Sanjay Lakshminarayanan , Kiran Kumar B M , S. Nagaraja Rao , Pranupa S.
The aim of this paper is to explore the use of various current mode control (CMC) techniques to design a single phase grid tie inverter integrated with anti-islanding protection. Three types of CMC techniques have been discussed, namely current hysteresis control (CHC), constant frequency control (CFC) and average current mode control (ACMC). The performance of the grid tie inverter in the event of grid voltage failure is also studied to help install an anti-islanding mechanism. The proposed control techniques shall eliminate the use of Phase locked loop (PLL) control as the current reference is generated from the grid voltage itself. All three current mode control techniques of an inverter have been simulated in MATLAB/Simulink to evaluate the performance of the designed inverter. The simulated results show a current THD of less than 5% in all three methods and a good anti-islanding response.
Volume: 12
Issue: 1
Page: 241-248
Publish at: 2021-03-01

Hardware in the loop simulative setup for testing the combined heat power generating wind turbine

10.11591/ijpeds.v12.i1.pp499-510
Ihor Shchur , Vsevolod Shchur , Ihor Bilyakovskyy , Mykhailo Khai
This paper describes the design and implementation of hardware in the loop (HIL) system based on induction motor wind turbine emulator for the study of the operation of a combined heat-power (CHP) generating wind energy conversion system (WECS). The energy generation part of the WECS consists of two specially designed generators that are placed on a common vertical axis, which is connected to the induction motor through a gearbox. The first generator is an electric two-armature axial PMSG and the second one is a thermal electromagnetic retarder. The software part of the HIL setup simulates the interaction of the wind flow with a vertical axis wind turbine (VAWT) and is implemented in a programmable logic controller based on the model developed in the MATLAB/Simulink. The results of experimental studies of the CHP WECS with the created HIL simulative setup at both constant and turbulent wind speeds have shown good agreement with the corresponding results of computer simulation. The created HIL simulative setup will be used for the development of an energy management system for CHP WECS.
Volume: 12
Issue: 1
Page: 499-510
Publish at: 2021-03-01

Extending the three-tier constructivist learning model for alternative delivery: ahead the COVID-19 pandemic in Nigeria

10.11591/ijeecs.v21.i3.pp1673-1682
Arnold Adimabua Ojugo , Rume Elizabeth Yoro
Constructivist theory defines a learning process whereby a learner denotes meaning for him/herself as he/she learns. Its challenges inform us that focus and intervention needs to be given to our curricular and instructional material, so that we may have something to offer students in the next century in terms of scientific development, drawing us into technological isolation. Study seeks to ascertain readability of some textbooks used in the teaching of science, technology, engineering and mathematics in tertiary institutions in Delta State. We chose 72 institutions using quota sampling. To uphold the virtues of internationalization, results show we must devise strategies against de-territorializing of knowledge. And thus, redefine educational goals to meet globalization as a means of network and unification. Thus, constructivism yields and apt description of both individual, group and organizational adoption patterns of technology for teaching and learning across disciplines at the various schools and educational levels. It images exemplary practices for teaching, learning and research, highlighting evidences that links technology integration, readability and quality students learning.
Volume: 21
Issue: 3
Page: 1673-1682
Publish at: 2021-03-01

On finite-time output feedback sliding mode control of an elastic multi-motor system

10.11591/ijpeds.v12.i1.pp10-19
Pham Tuan Thanh , Tran Xuan Tinh , Dao Phuong Nam , Dao Sy Luat , Nguyen Hong Quang
In this paper, the tracking control scheme is presented using the framework of finite-time sliding mode control (SMC) law and high-gain observer for disturbed/uncertain multi-motor driving systems under the consideration multi-output systems. The convergence time of sliding mode control is estimated in connection with linear matrix inequalities (LMIs). The input state stability (ISS) of proposed controller was analyzed by Lyapunov stability theory. Finally, the extensive simulation results are given to validate the advantages of proposed control design.
Volume: 12
Issue: 1
Page: 10-19
Publish at: 2021-03-01

An ultra-low complexity of 2:1 multiplexer block in QCA technology

10.11591/ijeecs.v21.i3.pp1341-1346
Ali Hussien Majeed
The limitations related to CMOS such as power consumption and parasitic capacitance lead scientists to search for new technologies. Quantum-dot cellular automata (QCA) is a CMOS alternative technology that uses charges instead of voltage level for binary representation. In QCA, many metrics are used for circuit differentiation such as delay, complexity and area. In this work, a new simple block of 2:1 QCA-Multiplexer is proposed. The proposed block is more efficient than previous designs by 0.43%, 0.53%, 50% and 0.72 in terms of area, complexity, delay and cost. QCADesigner software is used to design and verify the proposed circuit.
Volume: 21
Issue: 3
Page: 1341-1346
Publish at: 2021-03-01

Super-twisting SMC for MPPT and grid-connected WECS based on SCIG

10.11591/ijpeds.v12.i1.pp520-531
Bouhenna Amina , Khodja Mohammed , Merabet Boulouiha Houari
This paper proposes a high-order sliding mode control (HO-SMC) with the super-twisting (ST) algorithm for maximum power point tracking (MPPT) and grid-connected wind energy conversion system (WECS), based on squirrel-cage induction generator (SCIG). The main features of this control strategy are attenuation of the chattering phenomenon inherent in first-order sliding mode control and its robustness against external and internal disturbances encountered by the wind power system. The simulation is carried out under SimPowerSystems of MATLAB/Simulink to evaluate the performance and effectiveness of the proposed control compared with conventional and fuzzy logic proportional-integral (PI) controllers for three different scenarios of disturbances, a fluctuating wind speed, a grid voltage drop, and parametric variations.
Volume: 12
Issue: 1
Page: 520-531
Publish at: 2021-03-01

Modeling and simulation of forces applied to the horizontal axis wind turbine rotors by the vortex method coupled with the method of the blade element

10.11591/ijpeds.v12.i1.pp413-420
Ibtissem Barkat , Abdelouahab Benretem , Fawaz Massouh , Issam Meghlaoui , Ahlem Chebel
This article aims to study the forces applied to the rotors of horizontal axis wind turbines. The aerodynamics of a turbine are controlled by the flow around the rotor, or estimate of air charges on the rotor blades under various operating conditions and their relation to the structural dynamics of the rotor are critical for design. One of the major challenges in wind turbine aerodynamics is to predict the forces on the blade as various methods, including blade element moment theory (BEM), the approach that is naturally adapted to the simulation of the aerodynamics of wind turbines and the dynamic and models (CFD) that describes with fidelity the flow around the rotor. In our article we proposed a modeling method and a simulation of the forces applied to the horizontal axis wind rotors turbines using the application of the blade elements method to model the rotor and the vortex method of free wake modeling in order to develop a rotor model, which can be used to study wind farms. This model is intended to speed up the calculation, guaranteeing a good representation of the aerodynamic loads exerted by the wind.
Volume: 12
Issue: 1
Page: 413-420
Publish at: 2021-03-01

Crucial problems in arranged the lesson plan of vocational teacher

10.11591/ijere.v10i1.20604
Muhammad Nurtanto , Nur Kholifah , Alias Masek , Putu Sudira , Achmad Samsudin
This study aimed to explore the implementation of the 2013 curriculum in vocational schools, Banten in terms of the readiness and quality of the learning tools that have been prepared. A total of 957 respondents from 2017 to 2018, consisting of four cities and three districts in Banten Province were involved in the training and mentoring program, namely vocational teachers and vice-principals in the curriculum field. Data were collected using questionnaire sheets, FGD notes, and observation check dates. The data obtained are analyzed and interpreted based on the specified categories. The results showed that: 1) Teacher readiness for learning tools in the components a) Core Competencies (CC) and Basic Competencies (BC) analysis of 45.31%, b) Program mapping of 38.37%, learning plan preparation of 39.45% and c) Learning evaluation of 36.78%; 2) The quality of lesson plan (LP) the science lesson plan analysis instrument (SLPAI) based is divided into two groups. The category "Quality" in the instructional program and instructional plan aspects, and the category "Moderate" in the instructional media and assessment and others aspects; and 3) The difficulty of learning device components, including authentic assessment, use of methods, literacy approaches, and lesson planning. The implementation of training, mentoring, and supervision programs are adjusted to the experience of vocational teachers taking into account the teacher's involvement in the implementation of the curriculum, age, and school readiness.
Volume: 10
Issue: 1
Page: 345-354
Publish at: 2021-03-01

Power quality improvement using fuzzy logic-based compensation in a hybrid power system

10.11591/ijpeds.v12.i1.pp576-584
Soumya Ranjan Das , Debani Prasad Mishra , Prakash Kumar Ray , Surender Reddy Salkuti , Arun Kumar Sahoo
This paper is based on the improvement of power quality (PQ) using fuel cell and fuzzy based controller. By using the proposed controller, the quality of power in the grid system especially in micro grid connected with non- linear and unbalanced load is enhanced. The configuration of the system is combined with hybrid arrangement of photovoltaic ([PV) with wind energy conversion system (WECS), fuel cell (FC) including the compressed air energy storage system (CAES) where the power management is controlled by using the distributed power sharing technique. In this proposed system the distortions in voltage at point of common coupling (PCC) is decreased by using the FC which acts as compensator in hybrid system. Reference current is developed which depends on real and reactive power of the source connected to the compensator. Based on demand of power for nonlinear load, without using any external communication interfaces, the proposed control theory can change the modes of operation and can compensate the unbalance in the system which is caused due to single-phase micro sources and load changes. The complete productive design of the micro-sources and power electronic converters are presented in the paper. The operation and performance of the proposed controller used in microgrid is validated through simulation in MATLAB/Simulink environment.
Volume: 12
Issue: 1
Page: 576-584
Publish at: 2021-03-01

Noise-robust classification with hypergraph neural network

10.11591/ijeecs.v21.i3.pp1465-1473
Nguyen Trinh Vu Dang , Loc Tran , Linh Tran
This paper presents a novel version of hypergraph neural network method. This method is utilized to solve the noisy label learning problem. First, we apply the PCA dimensional reduction technique to the feature matrices of the image datasets in order to reduce the “noise” and the redundant features in the feature matrices of the image datasets and to reduce the runtime constructing the hypergraph of the hypergraph neural network method. Then, the classic graph based semisupervised learning method, the classic hypergraph based semi-supervised learning method, the graph neural network, the hypergraph neural network, and our proposed hypergraph neural network are employed to solve the noisy label learning problem. The accuracies of these five methods are evaluated and compared. Experimental results show that the hypergraph neural network methods achieve the best performance when the noise level increases. Moreover, the hypergraph neural network methods are at least as good as the graph neural network.
Volume: 21
Issue: 3
Page: 1465-1473
Publish at: 2021-03-01

Simulation model of single phase PWM inverter by using MATLAB/Simulink

10.11591/ijpeds.v12.i1.pp212-216
Salam Waley Shneen , Fatin Nabeel Abdullah , Dina Harith Shaker
This work is presenting under the title simulation model of single phase PWM inverter by using MATLAB/Simulink. There are many researchers’ works in this field with the different ways because it is important field and it has many applications. The converter DC power to AC power for any system that mean it need the power electronic device (inverter). The inverter is using when the source DC power and the load AC power. In this work, the simulation system includes the source 300V DC power, inverter, LC filter and load (R). The simulation result shows the waveform of all part in this system like input and output current and voltage.
Volume: 12
Issue: 1
Page: 212-216
Publish at: 2021-03-01

Development of Webtoon non-test instrument as education media

10.11591/ijere.v10i1.21007
Mery Berlian , Rian Vebrianto , Musa Thahir
The objective of this research was to develop non-test instrument or questionnaire to measure the evaluation of the use of Webtoon among the students of Open University in Pekanbaru, Riau, Indonesia and to obtain the instrument’s validity and reliability. This research employed the Analysis, Design, Development, Implementation, Evaluation (ADDIE) instructional model. The data were collected using online questionnaire. There were 55 respondents participated in this research. The data collected were analyzed descriptively using SPSS program version 23.00 for windows. The result of the data analysis indicated that the instrument has the percentage of agreement result of 82.75% (valid) and Cronbach alpha with score 0.942 (reliable). The data proved that the instrument has very feasible. This result showed that this research and development produced Webtoon non-test instrument which is valid and reliable.
Volume: 10
Issue: 1
Page: 185-192
Publish at: 2021-03-01

A robust high-speed sliding mode control of permanent magnet synchronous motor based on simplified hysteresis current comparison

10.11591/ijpeds.v12.i1.pp1-9
Ifeanyi Chinaeke-Ogbuka , Augustine Ajibo , Kenneth Odo , Uche Ogbuefi , Muncho Mbunwe , Cosmas Ogbuka , Emenike Ejiogu
A robust high-speed sliding mode control (SMC) of three phase permanent magnet synchronous motor (PMSM) is presented. The SMC served for inner speed control while a simplified hysteresis current control (HCC) scheme was used in the outer current control to generate gating signals for the inverter switches. The present research leverages on the ability of SMC to directly access system speed error which it attempts driving to zero by cancelling modelling uncertainties and disturbances. Performance comparison was done for the SMC model and an existing model having classical PI controller. With the initial positive speed command of 200 rpm at 5 Nm constant loading, rotor speed with SMC neatly settled to the reference speed at 0.085 seconds without overshoot while the rotor speed of the model with PI controller settled at 0.217 seconds after overshoot. This translates to 155.3% speed enhancement. Similar superior speed performance of the SMC was also observed during recovering from sudden speed reversal. While the SMC model recovered and settled to the reference speed of -200 rpm at 0.369 seconds, the model with PI controller settled at 0.482 seconds. From the results, it can be seen that SMC demonstared superiority over the conventioanl PI controller for complex drives systems.
Volume: 12
Issue: 1
Page: 1-9
Publish at: 2021-03-01
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