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International Journal of Advances in Applied Sciences

IJAAS
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Published by Institute of Advanced Engineering and Science

ISSN : 22528814 EISSN : 27222594 DOI : http://doi.org/10.11591/ijaas

Core Subject : Science, Education, Social,

Earth & Planetary Sciences Environmental Science Materials Science & Nanotechnology Mathematics Physics

International Journal of Advances in Applied Sciences (IJAAS) is a peer-reviewed and open access journal dedicated to publish significant research findings in the field of applied and theoretical sciences. The journal is designed to serve researchers, developers, professionals, graduate students and others interested in state-of-the art research activities in applied science areas, which cover topics including: chemistry, physics, materials, nanoscience and nanotechnology, mathematics, statistics, geology and earth sciences.

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Articles 11 Documents

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Search results for , issue "Vol 10, No 4: December 2021" : 11 Documents clear

Investigation of temperature effects of a low-level laser source within the muscle phantom Hüseyin Okan Durmuş; Neslişah Gün; Baki Karaböce; MirHasan Yu. Seyidov
International Journal of Advances in Applied Sciences Vol 10, No 4: December 2021
Publisher : Institute of Advanced Engineering and Science

In this study, temperature effects of a low-level laser source were investigated in a muscle phantom within 20, 40, 60, and 80 seconds time intervals. A temperature meter device having a 5-channel and 10 kΩ negative temperature coefficient (NTC) type thermistor sensors were developed in TÜBİTAK UME Medical Metrology Laboratory for these special temperature measurements. The muscle phantom poured into a phantom container that was specially designed for 5-channel sensor placement and printed in a 3D printer. It has also been acoustically confirmed that the phantom has muscle phantom characteristics. As a result of this study, it is concluded that the laser source used is safe and suitable at therapy usage within the specified times in terms of the detected temperatures.

Implementation of Fuzzy Controller for ZCS Resonant Buck Converter Using Matlab/Simulink Pidikiti, Tripura
International Journal of Advances in Applied Sciences Vol 10, No 4: December 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v10.i4.pp%p

Soft switching techniques are widely used to control dc-dc converters to increase the efficiency and power conversion density. In this paper, an auxiliary circuit to achieve the soft switching condition for a buck converter is presented. The switching devices used in power converters need to withstand high voltage stress across them which leads to increased switching losses. To maximize the efficiency, soft switching techniques must be adopted. The two popular soft switching techniques are Zero Voltage Switching (ZVS) and Zero Current Switching (ZCS). In this paper Zero Current Switching (ZCS) technique is used. The performance of the converter is analysed first with PID controller and then with fuzzy logic controller (FLC). Simulation results are presented on 60 W converter using MATLAB / SIMULINK and performance comparison is presented with PID and fuzzy controllers

Utilizing ultra-wideband with wireless telecommunications applications microstrip Abhay Chaudhary
International Journal of Advances in Applied Sciences Vol 10, No 4: December 2021
Publisher : Institute of Advanced Engineering and Science

The small aspect, as well as low margins of the microstrip chip amplifier (MPA) is being used in a contact system. For the last few times within the last year's research, the majority of work with MPA has been centered towards designing the portable antenna design. Wireless networking systems may be fitted with a new ultrawideband digital monopoly antenna. Throughout this exponentially changing environment, and dual multi-standard antennas play a crucial role in the implementation of cell towers. This paper presents the nature of an ultra-wideband (UWB)-based antenna array for the shape of a substratum, feeding strategies or openings.

Impact of renewable energy in Indian electric power system V. Saravanan; K. M. Venkatachalam; M. Arumugam; M. A. K. Borelessa; K. T. M. U. Hemapala
International Journal of Advances in Applied Sciences Vol 10, No 4: December 2021
Publisher : Institute of Advanced Engineering and Science

This paper addresses the impact of renewable power generation such as photovoltaic and wind energy in the existing power system operations. Various modeling approaches and power quality/reliability analysis of these renewable energy sources in the electric power system by researchers and research organisations and utilities are outlined and their impacts are assessed. Challenges and protection schemes of renewable power integration into the existing grid are discussed through a detailed literature review and study of renewable integration into the Indian power system are outlined including potential planning and policy actions to support renewable energy integration in India.

Review of impedance source power converter for electrical applications V. Saravanan; K. M. Venkatachalam; M. Arumugam; M. A. K. Borelessa; K. T. M. U. Hemapala
International Journal of Advances in Applied Sciences Vol 10, No 4: December 2021
Publisher : Institute of Advanced Engineering and Science

Power electronic converters have been actively researched and developed over the past decades. There is a growing need for new solutions and topography to increase the reliability and efficiency of alternatives with lower cost, size and weight. Resistor source converter is one of the most important power electronic converters that can be used for AC-DC, AC-AC, DC-DC and DC-DC converters which can be used for various applications such as photovoltaic systems, wind power systems, electricity. Vehicles and fuel cell applications. This article provides a comprehensive overview of Z-source converters and their implementation with new configurations with advanced features, emerging control strategies and applications.

Trainable generator of educational content Vladimir Rotkin
International Journal of Advances in Applied Sciences Vol 10, No 4: December 2021
Publisher : Institute of Advanced Engineering and Science

As the main problem of the research, the possibility of creating a universal educational platform that combines the possibilities of an online generation of educational content with the interface of the training process itself was considered. The methodology of the educational platform has been developed, in which the mass generation of content is carried out at random, based on simulation models of educational objects. A matrix interface is used, which allows performing custom operations by entering a sequence of typical operators. The system forms a reference base of operators, replenishing it from user solutions, which makes it possible to train and improve the system in order to provide methodological support to student users. An active demo layout of an educational content generator was created and tested, using the example of a specific problem from school mathematics. All methodological options function in the layout. There are three interface options: administrative, training and control. It was concluded that the approach based on the simulation of educational objects makes it possible to create a unified algorithmic platform that combines the functions of content generation with educational training. The system contains a unique option to teach yourself based on its interaction with students.

Techno-economic environmental assessment of hybrid renewable energy system in India K. M. Venkatachalam; V. Saravanan
International Journal of Advances in Applied Sciences Vol 10, No 4: December 2021
Publisher : Institute of Advanced Engineering and Science

The co-ordination of non-conventional energy technologies such as solar, wind, geothermal, biomass and ocean are gaining significance in India due to more energy requirements and high greenhouse gas emission. In this assessment, the sustainability of emerging the gird isolated hybrid solar photovoltaic (PV)/wind turbine (WT)/diesel generator (DG)/battery system for Arunai Engineering College, India building is evaluated. The techno-economic and environmental research was inspected by HOMER Pro software by choosing the optimal combination depends on size of the components, renewable fraction, net present cost (NPC), cost of energy (COE) and greenhouse gas (GHG) emission of the hybrid system. From the acquired outcomes and sensitivity investigation, the optimal PV-WT-DG-battery combination has a NPC of $28.944.800 and COE $0.1266/kWh, with an operating cost of $256.761/year. The grid isolated hybrid system is environmentally pleasant with a greenhouse gas emission of 2.692 kg/year with renewable fraction of 99.9%.

Non-linear creep of polypropylene utilizing multiple integral Mahmoud Fadhel Idan
International Journal of Advances in Applied Sciences Vol 10, No 4: December 2021
Publisher : Institute of Advanced Engineering and Science

Multiple integral representation (MIR) has been used to represent studying the effect of temperature on the amount of nonlinear creep on the semi-crystalline polypropylene (PP) under the influence of axial elastic stress. To complete this research, the kernel functions were selected, for the purpose of performing an analogy, and for arranging the conditions for the occurrence of the first, second and third expansion in a temperature range between 20 °C-60 °C, i.e., between the glass transition and softening temperatures, within the framework of the energy law. It was observed that the independent strain time increased non-linearly with increasing stress and non-linearly decreased with increase in temperature, although the time parameter increased non-linearly with stress and temperature directly. In general, a very satisfactory agreement between theoretical and practical results on the MIR material was observed.

Arduino-based night return mechanism for passive solar trackers Willy Stephen Tounsi Fokui; Destine Mashava
International Journal of Advances in Applied Sciences Vol 10, No 4: December 2021
Publisher : Institute of Advanced Engineering and Science

Solar trackers are support platforms that keep photovoltaic panels facing the sun by following the sun from dusk to dawn. There exist active solar trackers that make use of motors and gears to orientate the photovoltaic panels towards the sun; and passive solar trackers that operate through the differential heating of the fluid in the tracking rack to follow the sun. Passive solar trackers suffer from the lack of a night return mechanism and a slow wake-up response in the mornings due to the limitations on the surface inclination angle of the rack. This paper seeks to address these issues by proposing an Arduino-based night return mechanism for passive solar trackers. An energy-saving heating element such as the ultra heating fabric manufactured by WireKinetics Co. is installed on the west-side canister of the tracker. Before dawn, the fabric is automatically heated and this will force the refrigerant in the west-side canister to vaporize and cool in the east-side canister, forcing the tracker to return and face eastward before sunrise. The night return mechanism is designed and simulated using proteus profesional. Simulation results show that this system can significantly optimize the function of passive solar trackers.

Overview of microgrid systems V. Saravanan; K. M. Venkatachalam; M. Arumugam; M. A. K. Borelessa; K. T. M. U. Hemapala
International Journal of Advances in Applied Sciences Vol 10, No 4: December 2021
Publisher : Institute of Advanced Engineering and Science

This research paper discusses the different types of microgrids, their structural arrangements and the technology adopted for different power management projects. It also deals with various control strategies and security plans used for optimal performance. A detailed overview of the direct current (DC) microgrid system is discussed, outlining its configurations and technical-economic aspects. Performance evaluation of microgrid carried out through various reliability codes is also provided.

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