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499 articles for “feed system”
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A quad band PIFA for 4G / 5G wireless communication applications
Abstract: AbstractA compact PIFA for wireless RF (Radio Frequency) devices is presented. The proposed antenna covers GPS L1, GSM 1800, GSM 1900, UMTS 2100, LTE 1700/2100 MHz, LTE 2300, Bluetooth/Wi-Fi/IEEE 802.11 b/g/n, RFID, IEEE 802.16e mobile WiMAX, UNII and C-band frequency bands useful for both 4G and 5G wireless communication applications. The simulation results for return loss, VSWR, two-dimensional radiation patterns and current distribution are demonstrated. The parametric analysis of feed …
Published in Journal of Communication Engineering & Systems · Vol. 9, Issue 2, 2019 · pp. 7–15 Read article
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Automation in Computation Over Linux Integrated Environment
Abstract: The challenges of building an automated computational system for an effective controllerof job scheduling and execution of computational tasks in heavy computing researchprojects, either requires external controllers or must function within the restriction boundof the utility service offered by APIs. We address the problem of the automation incomputation over a Unix environment using effective shell programming techniques. Theapproach is mainly based on dividing computational jobs by explicitly reducing theproblem to …
Published in Journal of Advances in Shell Programming · Vol. 1, Issue 2, 2014 · pp. 5–7 Read article
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Simulation Model-based Transient Behaviour of a Doubly Fed Induction Generator in a Wind Energy Conversion System
Abstract: A Doubly-Fed Induction Generator (DFIG)'s transient behaviour is how it reacts to abrupt alterations or disruptions in the power system. DFIGs are widely used in turbines for wind power along with other renewable energy technologies. Recognising the transient behaviour is necessary to guarantee the power system's sustainability and dependability. This study presents the Simulink model-based demonstration of the transient behaviours of a doubly fed induction generator. Additionally included is a …
Published in Journal of Aerospace Engineering & Technology · Vol. 13, Issue 3, 2023 · pp. 1–7 Read article
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Design and Simulation of Triple Band Microstrip Patch Antenna for Ku-band, K-band and Ka-band Applications
Abstract: AbstractThis paper represents a microstrip patch antenna for future 5G-communication technology. The proposed antenna designs are simulated and their performances are analyzed for different parameters like lower return losses, higher gain, voltage standing wave ratio (VSWR), current distribution, far field radiation and wide bandwidth performance for the tri-frequency band operation in Ku band (12–18 GHz),K-band (18–27 GHz) and Ka-band (27–40 GHz) as per the specified IEEE standard. The proposed antenna …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 7, Issue 1, 2020 · pp. 26–33 Read article
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Waste-to-Wealth: Role of Green Bioprocess Engineering in Resource Recovery and Environmental Protection
Abstract: Green bioprocess engineering is a sustainable approach that improves industrial production by combining biotechnology with eco-friendly engineering methods. It uses biological processes – such as microbes, enzymes, and renewable resources – to produce useful products with a reduced environmental impact. Unlike traditional methods that depend on fossil fuels and generate significant waste, green bioprocessing focuses on conserving resources, improving energy efficiency, and minimizing waste. Using biomass and agro-industrial waste as …
Published in Research and Reviews : A Journal of Biotechnology · Vol. 16, Issue 2, 2026 · pp. 36–41 Read article
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An AI-Driven IoT Framework for Autonomous Quality Assurance in Optical Lens Manufacturing
Abstract: The evolution of high-precision optics—ranging from smartphone micro-lenses to high-end astronomical glass—demands unprecedented accuracy in manufacturing. Traditional inspection methods, reliant on manual sampling or static automated optical inspection (AOI), often fail to bridge the gap between high-speed production and the detection of microscopic surface aberrations. This paper introduces an integrated architecture combining the Internet of Things (IoT) and Deep Learning-based decision-making systems to revolutionize lens quality control. By deploying an …
Published in International Journal of Optical Innovations & Research · Vol. 4, Issue 1, 2026 · pp. 36–41 Read article
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A Compact CPW-fed Quadruple-band-notched Antenna with Concentric Annular-rings for UWB Applications
Abstract: In this paper, a compact coplanar waveguide (CPW)-fed quadruple-band-notched antenna with concentric annular-rings for ultra-wideband (UWB) applications is presented. The proposed antenna consists of four concentric annular-ring resonators, a circular shape radiating element and a CPW feed line. The quadruple band rejection is easily achieved by controlling the widths and radii of four concentric annular-ring resonators. Through the exception of four stop-bands at 3.29 to 3.7 GHz, 5.07 to 5.92 …
Published in Journal of Microwave Engineering and Technologies · Vol. 10, Issue 2, 2023 · pp. 38–47 Read article
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PREDICTIVE LEARNING POWERED BY AI AND SOPHISTICATED STUDENT ENGAGEMENT TECHNIQUES
Abstract: The contemporary landscape of education has witnessed a paradigm shift in integrating advanced technologies that have revolutionized the learning experience. Innovative methodologies have emerged to address longstanding challenges, such as enhancing student engagement, accurately predicting academic performance, and personalizing the learning journey. However, despite the numerous benefits that technology brings to education, there remains a crucial hurdle - sustaining student motivation and engagement. Traditional teaching methodologies often struggle to generate …
Published in International Journal of Behavioral Sciences · Vol. 3, Issue 1, 2026 · pp. 127–140 Read article
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Smart Home Automation Using ESP32
Abstract: In this paper, a concept or idea for home automation is presented. It involves the use of an ESP32, Blynk, IR remote, and manual switch to control eight relays both online and offline while keeping an eye on the feedback in real time via the Blynk app. Device automation offers a lot of potential for both the current and upcoming generations. In the field of automation, mobile communication technology is …
Published in Journal of VLSI Design Tools and Technology · Vol. 12, Issue 3, 2022 · pp. 20–28 Read article
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Sub-acute Toxicity of β-cyfluthrin in Hepatic Tissue and its Amelioration through Punica granatum in Swiss albino mice
Abstract: β-cyfluthrin, member of synthetic pyrethroid pesticide Type II is broadly used multipurpose insecticide. Widespread and indiscriminate use of β-cyfluthrin leads to environmental contamination and toxicity towards nontarget mammalian systems. The present study was undertaken to examine toxic manifestation of β-cyfluthrin in hepatic tissue of Swiss albino mice and also evaluate possible mitigative potential of pomegranate juice (PJ) in combating pesticide induced hepato-toxicity. Animals were divided into five groups namely, control, …
Published in Research and Reviews: A Journal of Toxicology · Vol. 10, Issue 3, 2020 · pp. 41–52 Read article
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A Review On A Compact Dual Polarized Antenna Array
Abstract: A compact dual-polarized antenna array for low-cost millimeter-wave (mm Wave) applications is proposed in this article. Utilizing a patch antenna with two orthogonal feeds positioned horizontally and vertically, a dual linear polarization antenna can be created. Two ports—a vertical port and a horizontal port—make up the suggested design. The antenna produces horizontal polarization by stimulating the horizontal port. The antenna produces vertical polarization by stimulating vertical port. With the higher …
Published in Journal of Microwave Engineering and Technologies · Vol. 9, Issue 2, 2022 · pp. 46–50 Read article
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An Application of Artificial Neural Networks for Air Quality Prediction of SO2 Concentrations in Calabar Metropolis
Abstract: The past few years have seen intense enhancements in our aptitude to simulate complicated physical systems using computers, which has led to the use of artificial neural networks (ANNs) in various capacities of scientific research. The artificial neural network has been applied to various ecological pollution complications and which has revealed some degree of precision. The study aims to advance a neural network air quality forecast model for the complex …
Published in Research & Reviews : Journal of Physics · Vol. 9, Issue 3, 2020 · pp. 8–11 Read article
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Antibiotic Residues in Broiler Meat: Challenges for Food Safety, Public Health, and Sustainable Broiler Farming Issues
Abstract: Antibiotic residues in broiler meat pose significant risks to food safety, public health, and the sustainability of poultry farming. The use of antibiotics in broiler production, both for therapeutic and prophylactic purposes, has led to the accumulation of residues in meat, which can contribute to the development of antimicrobial resistance (AMR). This paper explores the various potential sources of antibiotic residues in broiler meat, including feed-related factors, water contamination, injection …
Published in Research and Reviews : A Journal of Life Sciences · Vol. 15, Issue 1, 2025 · pp. 77–90 Read article
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Multiscale Catalytic Strategies for Sustainable Chemical Production: Integrating Computational Catalysis, Process Technology and Biocatalytic Transformations
Abstract: The transition toward sustainable chemical manufacturing requires catalytic technologies capable of maximizing resource efficiency, minimizing greenhouse gas emissions, and enabling the utilization of renewable feedstocks. Recent advances in computational catalysis, process technology, and biocatalytic transformations have created opportunities for the development of integrated catalytic platforms spanning molecular, reactor, and process scales. Density functional theory (DFT), machine learning-assisted catalyst discovery, and multiscale modeling have accelerated the rational design of heterogeneous, homogeneous, …
Published in Journal of Catalyst & Catalysis · Vol. 13, Issue 2, 2026 · pp. 27–35 Read article
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The Transformative Journey of Pregnancy: Insights into Maternal Adaptations
Abstract: During pregnancy, a woman’s body changes in many ways because of hormones. These changes can sometimes be uncomfortable, but most of the time they are normal and enable her to nourish and protect the fetus, prepare her body for labor, and develop her breasts to produce milk. During pregnancy, changes in hormone levels drive a wide range of physical transformations in a woman’s body, all of which play an essential …
Published in Research and Reviews : A Journal of Life Sciences · Vol. 14, Issue 3, 2024 · pp. 84–92 Read article
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Machinability and Reliability Analysis of Al6063–Al2O3 Metal Matrix Composites Using Image-Based Flank Wear Evaluation
Abstract: This study explores the machinability and reliability characteristics of Al6063–Al2O3 metal matrix composites (MMCs) as analogues for polymer–metal hybrid composite systems, focusing on their potential use in lightweight structural and metal matrix composite-integrated applications. The composite specimens were fabricated through stir casting with 3% and 9% Al2O3 reinforcements, followed by mechanical characterization that confirmed significant enhancements in hardness and strength compared to unreinforced Al6063. Machining experiments were performed using a …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 264–290 Read article
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Design Optimization and Performance Analysis of Autonomous Drone Systems
Abstract: In recent years, drones have become indispensable tools across various industries, thanks to their versatility and wide-ranging applications. The fabrication of drones is a complex process that integrates multiple engineering disciplines, including mechanical design, electrical systems, aerodynamics, and software development. The meticulous design of the drone’s frame, taking into account factors such as weight, durability, and aerodynamic efficiency, marks the commencement of the fabrication process. The paper presented a comprehensive …
Published in Journal of Aerospace Engineering & Technology · Vol. 14, Issue 3, 2024 · pp. 21–30 Read article
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Development and Analysis of General-Purpose Drone
Abstract: In recent years, drones have become indispensable tools across various industries, thanks to their versatility and wide-ranging applications. The fabrication of drones is a complex process that integrates multiple engineering disciplines, including mechanical design, electrical systems, aerodynamics, and software development. The meticulous design of the drone's frame, taking into account factors such as weight, durability, and aerodynamic efficiency, marks the commencement of the fabrication process. The paper presented a comprehensive …
Published in Journal of Aerospace Engineering & Technology · Vol. 14, Issue 4, 2024 Read article
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Large Scale Demonstration and Popularization of Bread Wheat (Triticum aestivum) Varieties in Selected Districts of Southwest Ethiopia Region
Abstract: wheat is a staple crop in Ethiopia, contributing to both the country's agricultural sector and the diet of its population. Cluster-based large-scale demonstrations of improved bread wheat varieties were conducted during 2022 meher cropping season in selected districts of two zones of southwest Ethiopia to demonstrate and promote improved bread wheat technology under farmers' conditions. Chena district from the Kaffa zone and Sheybench district from the Bench Sheko zone were …
Published in Research & Reviews : Journal of Agricultural Science and Technology · Vol. 12, Issue 3, 2023 · pp. 24–29 Read article
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Satellite Sensing in Climate Change Study: A Review
Abstract: Satellite remote sensing has revolutionized our understanding of climate change, providing a global and continuous perspective on Earth's climate system. This study highlights the crucial role of satellite observations in monitoring key climate variables, such as sea surface temperature, ice sheet extent, vegetation cover, and atmospheric composition. From monitoring greenhouse gas concentrations in the atmosphere to mapping ice sheet thickness and sea level rise, satellite instruments offer invaluable data for …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 14, Issue 2, 2025 · pp. 1–11 Read article