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57 articles for “direct coupled”
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A Review on Parasitically Coupled and a Direct Coupled Feed for a Microstrip Antenna Array
Abstract: Due to modern electronics, small size electronic systems have been increasing in integrated circuits and the physical size of systems is reduced. Hence, demand of small and low cost antennas has increased. Microstrip or patch antenna provides the lightweight, not expensive, and integration is easy. Microstrip antennas or patch antennas are one of the most attractive antennas for integrated systems and are widely used in wireless communication systems. This paper …
Published in Journal of Communication Engineering & Systems · Vol. 8, Issue 1, 2018 · pp. 15–18 Read article
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Analysis of Parabolically versus Exponentially Tapered Inbuilt Chip-to-Fiber Butt Coupler
Abstract: AbstractThe finite difference beam propagating method (BPM) is one of the most powerful technique to investigate linear and nonlinear lightwave propagation phenomena in axially varying waveguides such as curvilinear directional couplers, branching and combining waveguides, S-shaped bend waveguides, and different types of tapered waveguides. BPM is also quite important for the analysis of ultra short light pulse propagation in optical fibers. To date numerous algorithms for BPM have been proposed …
Published in Journal of Communication Engineering & Systems · Vol. 3, Issue 1, 2013 · pp. 11–15 Read article
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Anaphylaxis: Pathophysiology, Risk Factors, and Clinical Management
Abstract: Anaphylaxis is a syndrome characterized by broncho-constriction, vasodilatation, and hypovolemia, potentially fatal exposure to known or unknown antigens. It can be an immune-mediated (IgE & non-IgE) disease. Immunoglobulin G (IgG), complement related (C3a/C5a), bradykinin, leukotrienes, prostaglandin E2, and ligands of certain G-protein coupled receptors (GPCR) can directly activate mast cells, basophils, eosinophils, neutrophils, endothelial cells and smooth muscles. Serum tryptase level during episodes of anaphylaxis, skin test, and basophil activation …
Published in Research and Reviews : A Journal of Immunology · Vol. 15, Issue 2, 2025 · pp. 1–11 Read article
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Noise-Driven Collective Behavior in Mean-Field Coupled Lorenz Oscillator Networks
Abstract: This work investigates the spatiotemporal dynamics of an ensemble of 100 identical Lorenz oscillators coupled through a mean-field scheme in the presence of additive noise. Building on prior studies of spatiotemporal chaos in coupled Lorenz arrays and mean-field coupled chaotic oscillators, the focus is on how the competition between deterministic coupling and stochastic forcing shapes collective behavior, including complete synchronization, desynchronization, clustered states, and noise-modified spatiotemporal chaos. The governing equations …
Published in International Journal of Advanced Control and System Engineering · Vol. 4, Issue 2, 2026 Read article
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Light-Matter Interactions in Molecular Photochemistry
Abstract: Molecular photochemistry explores the ways of molecules interaction with light, absorb photons, and excited‐state processes, and ultimately conversion of photon energy into chemical change. Core concepts of this innovative and relevant field are matter interaction like electronic, vibrational, and rotational transitions; non‐adiabatic couplings; energy & electron transfer; and light–matter coupling in weak and strong regimes. This article briefly surveys the multiplicity of these interactions, from the fundamentals of photon absorption …
Published in International Journal of Photochemistry and Photochemical Research · Vol. 3, Issue 2, 2025 · pp. 33–42 Read article
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Wireless Electrical Power Transmission
Abstract: Abstract: Wireless power transmission (WPT) has been attracting a wide range of subjects in various fields and also become a highly active research area because of their potential in providing high technology to our daily lives. The wireless power transmission will be mandatory to use in the near future because this technology enables the transmission of electrical energy from a power source to an electrical load across an air gap …
Published in Journal Of Network security · Vol. 7, Issue 3, 2019 · pp. 23–30 Read article
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High Gain High Efficiency Single Switch DC–DC Converter for Green Power Source Conversion
Abstract: Efficiency of solar cell is very low and it is preferred to be operated at low voltages; so it is difficult to supply power to a certain load. Conventional boost converter offers limited gain. So a high voltage boosting is needed. Proposed converter consists of coupled inductor and switched capacitor technique to achieve high gain without high duty ratio and turns ratio. In the magnetic field of coupled inductor and …
Published in Journal of Power Electronics and Power Systems · Vol. 8, Issue 3, 2018 · pp. 46–56 Read article
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Computational Fluid Dynamics Simulations of Horizontal Wellbore Cleaning and Cement Placement Processes in Drilling and Completions Engineering Applications
Abstract: Mathematical modeling and simulations of complex coupled processes require both robust and accurate physics-based techniques. Computational fluid dynamics (CFD) have been used extensively in a wide range of fields such as aerospace, automotive, and chemical processing industries to name a few. Typically, processes during drilling and completion of wells involve modeling of complex rheology fluids, turbulence modeling, multiphase phenomena, and heat transfer. Each individual process could possibly result in a …
Published in Journal of Petroleum Engineering & Technology · Vol. 2, Issue 1-3, 2012 · pp. 26–39 Read article
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Design and Development of Special Purpose Drilling Machine
Abstract: This paper presents the design and manufacture of an automated drilling machine based on microcontroller (Arduino) to produce holes (10mm depth) in the work pieces of stainless steel AISI304. The drilling machining process proposed for a cycle of drilling. The cycle process begins when the start switch is pressed on, the head motor drives the ballscrew on which the drilling motor is mounted, by this arrangement the z axis movement …
Published in Trends in Machine design · Vol. 5, Issue 2, 2018 · pp. 1–8 Read article
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Remote Sensing and Atmospheric Modelling: Data, Processes, Integration and Future Directions
Abstract: Atmospheric modelling plays a central role in weather forecasting, climate projection, and air quality assessment; however, the availability, accuracy, and representativeness of atmospheric observations fundamentally constrain its reliability. Over the past two decades, rapid advances in remote sensing (RS) have transformed atmospheric observation by providing spatially continuous, multiscale measurements of key atmospheric variables, including aerosols, trace gases, clouds, precipitation, and atmospheric thermodynamic profiles. This review synthesises recent progress in integrating …
Published in International Journal of Atmosphere · Vol. 3, Issue 1, 2026 · pp. 54–67 Read article
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A study on Green Hydrogen in Power Sector
Abstract: In the global shift to a sustainable and decarbonized power sector, green hydrogen produced by electrolyzing water using renewable energy sources like solar, wind, and hydropower has become a crucial option. As nations intensify efforts to meet climate targets and reduce reliance on fossil fuels, green hydrogen offers a versatile energy carrier capable of addressing key challenges including energy storage, grid balancing, and deep decarbonization of hard-to-abate sectors. This paper …
Published in Journal of Energy, Environment & Carbon Credits · Vol. 16, Issue 1, 2026 · pp. 14–21 Read article
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Koch Slot DRA Antenna Array for Enhanced X-Band Applications
Abstract: This work introduces an innovative method aimed at improving the gain of Dielectric Resonator Antenna (DRA) arrays functioning within the X-band spectrum. The design features a Koch-shaped slot-coupled feeding structure, utilising the properties of a short-ended microstrip line to enhance radiation directionality. The results of the simulation show that compared to conventional rectangular and V-shaped slot designs, the suggested antenna array provides a notable gain enhancement. This performance boost demonstrates …
Published in Recent Trends in Electronics Communication Systems · Vol. 12, Issue 2, 2025 · pp. 8–20 Read article
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Design of a Stacked Aperture Coupled Microstrip Antenna for UWB Applications
Abstract: The paper presents a stacked T-shaped Aperture coupled microstrip antenna designed for ultra-wide band wireless applications. The proposed UWB antenna covers two frequency bands as of 2.49 to 2.9 GHz and 6.85 to 20 GHz and used for the various applications like Bluetooth, Zig-Bee (2.4 GHz), C band (6 to 8 GHz), X band (8 to 12 GHz), Ku band (12 to 18 GHz) and Satellite communication. The stacked antenna …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 4, Issue 1, 2017 · pp. 12–16 Read article
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Short Report on Polymer Based Automated Fluid Machines for Applications in Microfluidics
Abstract: In this experimental work, a couple of gradual expansion microchannels are fabricated by polymethylmethacrylate (PMMA) using the maskless lithography, hot embossing lithography and direct bonding technique. Dyed ethylene glycol and dyed water are the prepared working liquids. The CMOS camera catching 25 frames per second with a corresponding time-scale resolution of 0.04 second is used to record each surface-driven microfluidic flow of dyed ethylene glycol and dyed water in the …
Published in Journal of Materials & Metallurgical Engineering · Vol. 11, Issue 2, 2021 · pp. 23–28 Read article
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Performance and Analysis of PI Controller using Characteristic Ratio Assignment Method for Coupled Tank Process
Abstract: Control the level of the liquids is a critical need in many industrial processes. Often the tanks are so coupled together that the levels interact and exhibits a nonlinear behaviour. Control of coupled tank system using conventional PI controller, result in poor performance. In this paper the modelling and controller design for coupled tank liquid level process using characteristic ratio assignment (CRA) method is implemented. CRA method is an approach …
Published in Journal of Control & Instrumentation · Vol. 3, Issue 1-3, 2012 · pp. 66–75 Read article
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Parallel Privacy-Preserving Adaptive Federated Learning on GPU-Enabled Multi-Core Architectures
Abstract: The increasing deployment of parallel and distributed intelligent systems has intensified the need for privacy-preserving learning frameworks that can exploit multi-core and graphics processing unit (GPU)-based architectures without centralizing sensitive data. This work proposes a parallel adaptive federated learning (AFL) framework that integrates differential privacy and secure aggregation over heterogeneous multi-core and GPU platforms to enhance both data confidentiality and convergence efficiency. The framework dynamically adjusts client participation, learning rates, …
Published in Recent Trends in Parallel Computing · Vol. 13, Issue 1, 2026 · pp. 09–16 Read article
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Modification of Microstrip Antenna by “Hexagonal Shaped” Metamaterial for Wireless Applications
Abstract: AbstractIn this proposed paper, a split ring “Hexagonal Shaped” metamaterial structure is used to modify the factors of antenna. The compact patch antennas (CPA) are directive and their size is small in surroundings. These antennas are sources to achieve the recent requirements. These antennas are desired to be possessing less return loss, better directivity, higher bandwidth and compact size at the operating frequency when used in any communicating operation. This …
Published in Journal of Microwave Engineering and Technologies · Vol. 5, Issue 3, 2018 · pp. 25–29 Read article
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Effect of Welding Factors on Nugget Size of Polymer-Metal Composite Sheets Using Computational Methods
Abstract: Resistance spot welding (RSW) is a vital technique for joining materials in industries like automotive and aerospace. This study extends the application of RSW to polymer-metal composite sheets by developing 2D axisymmetric, thermo-electro-mechanical coupled model in ANSYS. The focus is on analyzing the temperature distribution, nugget formation, and parameter optimization in hybrid composite sheets, emphasizing the unique challenges posed by polymers' thermal and electrical properties. These properties differ significantly from …
Published in Journal of Polymer & Composites · Vol. 13, Issue 6, 2025 · pp. 612–623 Read article
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Modeling of Transformer Windings having Non-uniform Inductance Distribution
Abstract: A direct analytical procedure for analyzing power transformer windings with location-dependent series inductance is presented. This dependence is typically introduced in order to take the inter-turn mutual inductive coupling into consideration. The paper addresses the frequency domain analysis conducted in the complex s- or the jω-domains. Results for the frequency-dependent winding’s input impedance with different treatments of the transformer’s neutral point will be available. The frequency characteristics including the resonance …
Published in Journal of Power Electronics and Power Systems · Vol. 4, Issue 3, 2014 · pp. 12–25 Read article
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Compact MIMO Antenna Array based on Koch Fractal Metamaterial for 5G Applications
Abstract: In this paper, a design of a printed MIMO antenna array for 5G applications is proposed based on low profile structure. Thus, the antenna element is designed as a printed mender monopole with a partial ground plane. The partial ground plane is proposed to realize bandwidth enhancements through etching rectangular slots in the antenna back panel. It is found that such antenna shows two frequency bands, S11<-10dB, from 3 GHz …
Published in Journal of Microwave Engineering and Technologies · Vol. 9, Issue 3, 2022 · pp. 1–7 Read article