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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 680 Documents

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Hydrodynamic characteristics of marine composite propeller blade using a numerical approach M. L. P. Kishore; Vijay K. Singh; R. K. Behra; Chandra S. Saran; Manikant Paswan; Kapil Kumar
International Journal of Advances in Applied Sciences Vol 10, No 1: March 2021
Publisher : Institute of Advanced Engineering and Science

The aim of the present research work is to investigate the hydrodynamic characteristics (pressure distribution, rotational speed, thrust, and torque) of the conventional B-series composite propeller blade. The open water efficiency for the scaled model of the composite propeller blade is computed using computational fluid dynamics (CFD) fluent simulation tool. The obtained numerical results show that the propeller will operate at optimum efficiency for the given speed condition and perform with reduced efficiency at other operational speeds. The computed responses are also validated with the standard B-series data which verifies the accuracy and robustness of the present numerical approach in analyzing the performance characteristics of propellers. The deviation in solution ranges from 5 to 15% in the case of thrust, and 10 to 20% in the case of torque. Pressure estimation is usually quite accurate with a 5 to 8% variation. The tabular data of pressure distribution over the propeller blade may be used for further structural analysis.

Groundwater suitability for irrigated agriculture in alluvial Bengal delta plain: a review Md. Shajedul Islam; M. G. Mostafa
International Journal of Advances in Applied Sciences Vol 10, No 2: June 2021
Publisher : Institute of Advanced Engineering and Science

Groundwater is a vital source of irrigation and domestic purposes in Bangladesh, and hence, it must satisfy the water quality guidelines. The study has selected 11 districts of Bangladesh and collected secondary data regarding the irrigation water quality of groundwater. Several irrigation water indices, such as soluble sodium percentage (SSP), sodium adsorption ratio (SAR), magnesium adsorption ratio (MAR), residual sodium carbonate (RSC), Kelly’s ratio (KR), permeability index (PI), and irrigation water quality (IWQ) index are applied to evaluate irrigation water quality. According to IWQindex, the results showed 25.5% of water samples fell in a highly suitable water type, whereas 33.5% exhibited a low suitability type, and the remaining 41% showed medium suitability for irrigation purposes. The values of SAR, SSP, RSBC, and MAR indices showed that about 31-64% of water samples were very good, whereas 5-20% were very poor for the same purpose. The results of TDS, EC, and total hardness showed good results as 88-93% of water samples fell in fair to excellent quality. The salinity hazard was found in the groundwater of coastal areas and was completely unfit for irrigation. The study findings would help for improving the management of the groundwater resources for agricultural purposes in Bangladesh.

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.

A review on the plant secondary metabolites with special context with North East India Devi Ritismita; Manash Pratim Sarma
International Journal of Advances in Applied Sciences Vol 10, No 3: September 2021
Publisher : Institute of Advanced Engineering and Science

Extracting phytochemicals or phytocompounds for the upliftment of general health and sustainability is one of the greatest needs of the millennium. Plants have immense quality in regard to secondary metabolites although not required for general growth and development yet are very much necessary for forming a protective gear and maintaining homeostasis. With their immense diversity in curing various diseases, these plants' secondary metabolites therefore must be put forth and given much importance in generation and production from the root level to the mission worldwide. Along with the increasing cases of failure in the usage of chemotherapeutic drugs and their utilities, the implementation of secondary metabolites for their various medicinal characteristic in therapeutic cases are also increasing in demand. With the increasing demand for Ayurveda treatment and the popularity of the mass, it can be positively taken up as a means of earning capital and making self-sustaining. North-Eastern states of India in this regard are a vital source of income and also a media to generate and bring indigenous products to the world.

Effect of thiourea on structure, morphology, and optical properties of spray deposited CZTS thin films for solar cell applications Ramesh B. Mahewar; Ravikumar R. Vidule; Limbraj S. Ravangave
International Journal of Advances in Applied Sciences Vol 10, No 1: March 2021
Publisher : Institute of Advanced Engineering and Science

Cu2ZnSnS4 (CZTS) films of different Thiourea (SC (NH2)2) molarity were deposited by using a simple chemical spray technique at substrate temperature 275 °C. Analytical reagent Grade Copper chloride (CuCl2), Zinc chloride (ZnCl2), and Tin chloride (SnCl4.5H2O) were used as Cu+, Zn+, and Sn+ ion sources respectively and thiourea (SC(NH2)2) (0.02, 0.04, 0.06, 0.08, and 0.1 M) was used as an S- ion source. A set of five CZTS films was deposited using five different molarity of thiourea. The structure, morphology, elemental analysis, and optical properties of these films were studied using X-ray diffractometer (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and UV-visible spectroscopy techniques respectively. The XRD spectra showed that all films are polycrystalline tetragonal structures with preferential orientation along 112 planes. The calculated crystallite size was increased with an increase in thiourea concentration. Variations of optical band gap with thiourea molarity have been investigated using Tauc plots. SEM micrographs exhibit CZTS spherical granules regularly arranged with some void spaces. The purity of deposited films was investigated using EDX analysis. All the CZTS films exhibit a higher absorption coefficient (α>104) cm-1 and a band gap in the reported range (1.2 to 1.53 eV) can be used as an absorber layer in solar cells.

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.

Design and implementation of an African native language-based programming language Ezekiel K. Olatunji; John. B. Oladosu; Odetunji A. Odejobi; Stephen O. Olabiyisi
International Journal of Advances in Applied Sciences Vol 10, No 2: June 2021
Publisher : Institute of Advanced Engineering and Science

Most of the existing high-level programming languages have hitherto borrowed their lexical items from human languages including European and Asian languages. However, there is a paucity of research information on programming languages developed with the lexicons of an African indigenous language. This research explored the design and implementation of an African indigenous language-based programming language using Yoruba as a case study. Yoruba is the first language of over 30 million people in the southwest of Nigeria, Africa; and is spoken by over one hundred million people worldwide. It is hoped, as established by research studies, that making computer programming possible in one’s mother tongue will enhance computer-based problem-solving processes by indigenous learners and teachers. The alphabet and reserved words of the programming language were respectively formed from the basic Yoruba alphabet and standard Yoruba words. The lexical items and syntactic structures of the programming language were designed with appropriate regular expressions and context-free grammar, using Backus-Naur form (BNF) notations. A prototype implementation of the programming language was carried out as a source-to-source, 5-pass compiler. QBasic within QB64 IDE was the implementation language. The results from implementation showed the functional correctness and effectiveness of the developed programming language. Thus, lexical items of a programming language need not be borrowed exclusively from European and Asian languages, they can and should be borrowed from most African native languages. Furthermore, the developed native language programming language can be used to introduce computer programming to indigenous pupils of primary and junior secondary schools.

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.

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