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365 articles for “Channel”
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CFD Investigation of Volume Fraction of Nanofluid on Heat Transfer Rate in Micro Channel Heat Sink
Abstract: AbstractNew methods of removing heat from integrated chips of the electrical devices are very important. Mini channel liquid cooling is the new method by which we can remove heat from electrical devices easily. Uses of nanofluid in the mini channel liquid cooling is the experiment study. We investigated the effect of nanofluid on the heat transfer rate. We also investigated the effect of volume fraction of a nanofluid in the …
Published in Recent Trends in Fluid Mechanics · Vol. 4, Issue 3, 2017 · pp. 1–8 Read article
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Study and Performance Analysis of Orthogonal Frequency Division Multiplexing with Different Modulation for Rayleigh Channel Model
Abstract: AbstractFor the advancement of wireless communication systems, methods such as MIMO, OFDM and integrating them together as MIMO-OFDM are very useful. OFDM is used in numerous wireless transmission standards nowadays. In OFDM, high rate data stream is divided into low-rate streams which are transmitted together over a number of subcarriers. A broadband and frequency-selective channel are transformed into a multiplicity of parallel narrow-band single channels by the OFDM modulation. By …
Published in Journal of Communication Engineering & Systems · Vol. 9, Issue 2, 2019 · pp. 76–80 Read article
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Performance Improvement in Massive MIMO System with Channel Coding
Abstract: In this paper, we concentrate on performance for Massive Multiple Input Multiple Output (MIMO) with channel coding and without channel coding wherein the performance of Bit Error Rate (BER) of both is compared. In the test setup, the Base station is incorporated with 32 antennas along with 32 User terminals with single antenna providing a reliable communication. The coded Massive MIMO system for Channel coding adopted Low Density Parity Check …
Published in Research & Reviews: A Journal of Embedded System & Applications · Vol. 8, Issue 1, 2020 · pp. 19–24 Read article
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Deformation Behaviour of the Billet and Tooling Design on AA5083 through Equal Channel Angular Pressing With Effect of Back Pressure
Abstract: Equal channel angular pressing is an emerging method applied to subject materials to significant plastic strains while maintaining the original shape of the billet. Researchers have discovered that the level of strain attained through equal channel angular pressing is influenced by factors such as the angle of die, friction conditions, and the implementation of back pressure. These variables significantly impact the microstructure and the irregularity of strain within the billet …
Published in Journal of Polymer & Composites · Vol. 12, Issue 1, 2024 · pp. 287–303 Read article
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Numerical Investigation of AA5053 Through Equal Channel Angular Pressing Technique: An Overview
Abstract: Equal channel angular pressing is recognized as the predominant method for bulk severe plastic deformation processing and has been employed for refining the grain structure in numerous metals and alloys. This study utilized finite element analysis to examine the processing of metallic billets through simple shear deformation. For the study, the die channel angle was chosen based on achieving the minimum energy consumption to induce maximum uniform strain. Among the …
Published in Trends in Machine design · Vol. 12, Issue 3, 2025 · pp. 40–47 Read article
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A New Analytical Expression of Channel Capacity with MRC Diversity Over Composite Model of α-μ/Inverse Gaussian Fading Distribution
Abstract: Abstract: Fading in a wireless communication system occurs basically due to two phenomena, multipath fading, and shadowing. A realistic scenario would comprise of both the phenomenon occurring simultaneously. Such a scenario is frequently characterized by a composite model of multipath/shadowing fading. In this work, a novel expression for the composite model of αμ/Inverse-Gaussian (IG) distribution with MRC diversity is obtained using the GaussLaguerre integration technique. Further utilizing the obtained expression …
Published in Journal of Microelectronics and Solid State Devices · Vol. 6, Issue 1, 2019 · pp. 22–29 Read article
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Design and Fabrication of Automated Channel Cleaner
Abstract: This paper focuses on the design and fabrication of automated channel cleaning system. Water is a basic necessity of humans & all living beings. There is plenty of water on earth but that is not suitable for human use. For some purpose clean water is more important if used. The impurities is present in water can cause hazardous disease.. Debris in drain water can be only like empty bottles, polythene …
Published in Journal of Production Research & Management · Vol. 10, Issue 2, 2020 · pp. 6–12 Read article
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Experimental Investigations on the Effects of Channel Aspect Ratio and Surface Wettability to Control the Surface-Driven Capillary Flow of Water in Straight PMMA Microchannels
Abstract: AbstractTotal 214 individual straight polymethylmethacrylate (PMMA) microchannels have been fabricated by the maskless lithography, hot embossing lithography, direct bonding technique, and atmospheric pressure air dielectric barrier discharge (DBD) plasma processing. The experimental investigations on the effects of structural properties (channel aspect ratios) and physical properties (surface wettability, capillary pressure and kinetic energy) on the surface-driven capillary flow of dyed water in straight PMMA microchannels is a novel approach in this …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 3, 2016 · pp. 1–12 Read article
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A Review of Experimental and Numerical Investigation on the Heat Transfer in Micro-Channel Heat Exchanger for Various Nano Fluids
Abstract: AbstractA tremendous amount of work has been carried out on micro and nanoscale heat exchanger. Cooling requirement is increasing day by day in field of, high performance Aircraft gas turbine engines, Heat pumps, Air conditioning, Heat recovery ventilators, Integrated circuits (IC), VLSI devices, Computer chips, Printed circuit boards and biomedical applications etc. Many investigators focused on parameters such as Reynolds number, cross cut length, pressure drop, particle concentration of Nano …
Published in Recent Trends in Fluid Mechanics · Vol. 5, Issue 3, 2018 · pp. 1–7 Read article
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Novel MOSFET Based Pressure Sensor That Uses Combined Channel Piezoresistance and Gate Capacitance Effects
Abstract: The paper considers modeling and analysis of a square and circular diaphragm Suspended Gate MOSFET based pressure sensor using COMSOL Multiphysics. Two structures, one a square with an n-channel MOSFET at the center and the second a circle with a p-channel MOSFET at the edge of the diaphragm were simulated. The piezoresistance effect of the channel and capacitance variation due to the suspended gate have been exploited in designing the …
Published in Recent Trends in Sensor Research & Technology · Vol. 2, Issue 2, 2015 · pp. 30–39 Read article
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BER Performance of Lognormal Channel Model with Imperfect CSI for Free Space Optical Communication
Abstract: ABSTRACT In this paper, Lognormal Channel model has discussed with the assumption of imperfect CSI. This channel model is used to describe atmospheric channel condition in mathematical form. BER performance of this channel model is shown according to turbulence scenario based on BER equation available. Here Gauss-Markov model is used for the case of imperfect CSI. Keywords-lognormal, Imperfect CSI, Gauss-Markov model, scintillation index,turbulence
Published in Trends in Opto-electro & Optical Communication · Vol. 2, Issue 3, 2012 · pp. 1–7 Read article
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Performance Analysis of OFDM System Using Non-conventional Transform and Non-conventional Mapping Schemes over Rayleigh Channel
Abstract: ABSTRACT High data rate wireless transmission is required to meet the rapidly increasing demands for mobile communications. Fast Fourier transform (FFT)-OFDM has drawn much attention due to its simple implementation and robustness against frequency-selective fading channels. Recently, the advantages of the discrete cosine transform (DCT)-based OFDM have come to the light. In this paper, performance of the conventional FFT-OFDM system is compared with non-conventional DCT-OFDM in terms of bit error …
Published in Journal of Communication Engineering & Systems · Vol. 2, Issue 1, 2012 · pp. 13–20 Read article
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Numerical Investigation of Heat Transfer Enhancement in Micro-Channel Cooling Using Finite Element Analysis
Abstract: Due to the enormous heat fluxes emitted by modern electronic chips, there is a persistent need to enhance the efficiency of cooling systems. This study's focus is on optimizing heat transfer in micro-channel heat sinks that use liquid cooling. Geometric changes and the use of nano-fluids as coolants in place of water are performed to achieve this goal with little energy consumption. Numerical analysis of pipe micro-channel fluid flow and …
Published in International Journal of Energy and Thermal Applications · Vol. 1, Issue 1, 2023 · pp. 36–44 Read article
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Evaluation of microstructure properties and characterization of fracture locus of AA5083 through equal channel angular pressing techniques
Abstract: In this investigation, a commercially available aluminium alloy called AA5083 was subjected to two passes of equal channel angular pressing utilising a route B_C at room temperature for this experiment. To evaluate the effect of AA5083, the microstructure, mechanical attributes, and wear parameters of the alloy were examined both prior to and subsequent to undergoing this technique. Using an optical microscope, microstructural investigations were performed on the pressed alloy's flow …
Published in Journal of Polymer & Composites · Vol. 12, Issue 1, 2024 · pp. 270–286 Read article
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Analysis of a Communication Link Performance Across Various Rayleigh Channels in Tropical Climates
Abstract: Tropical regions are characterized by intense and persistent rainfall throughout most of the year, and this environmental condition significantly influences wireless communication performance. The continuous presence of heavy precipitation weakens, scatters, and disrupts radio frequency signals, causing noticeable attenuation during transmission from the source to the destination. As a result, reliable communication becomes challenging, particularly for modern high-speed systems such as 5G networks. To address this limitation and enhance communication …
Published in Journal of Communication Engineering & Systems · Vol. 16, Issue 1, 2026 · pp. 06–12 Read article
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Optimizing Heat Transfer in Rectangular Channels with Turbulators: A Comprehensive Review
Abstract: Turbulators and various obstructions strategically placed along the airflow path in a channel are employed to enhance heat transfer This enhancement is achieved by disrupting the laminar sub-layer or intensifying turbulence within the duct passage. Numerous types of turbulator elements have been extensively utilized to optimize the heat transfer characteristics in such systems. Investigating further, researchers have explored the application of roughness elements in two-dimensional, three-dimensional, and irregular shapes. This …
Published in Journal of Experimental & Applied Mechanics · Vol. 14, Issue 3, 2023 · pp. 7–17 Read article
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Influence of Graded Channel on Performance of Symmetric Double Material Gate Insulator FDSOI MOSFET
Abstract: Abstract: In this paper, we investigate the effect on the linearity, analog and RF performance of graded channel in case of hetero-gate-dielectric FDSOI MOSFET with higher doping at source end and low doping at drain end. The major figure of merits (FOMs) studied are on-state drive current (ION), transconductance (gm), total gate capacitance (Cgg), cut-off frequency (fT), higher order derivative of transconductance (gm’, gm’’), intermodulation distortion (IMD3) and third- order …
Published in Journal of Microelectronics and Solid State Devices · Vol. 6, Issue 1, 2019 · pp. 12–17 Read article
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Reduction of Short Channel Effects with the Variation of Poly Doping and Source/Drain Doping
Abstract: In this paper, the concentration of poly-silicon doping and source/drain doping has been varied to obtain the approximation the OFF state leakage current for N channel MOSFET. A lightly doped NMOS has been designed using 45 nm technology in ATHENA and simulated in ATLAS of SILVACO TCAD tool. After simulation results, it has been observed that as the poly-silicon doping and source drain doping concentrations are decreased, there is a …
Published in Journal of Semiconductor Devices and Circuits · Vol. 4, Issue 3, 2017 · pp. 35–42 Read article
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A Practical Iterative Side Channel Cube Attack on AES-128/256
Abstract: AbstractThe Side Channel Cube Attack (SCCA) is a kind of Algebraic Side Channel Attack(ASCA) consisting of theoretical and practical aspects. This paper presents a general framework for the SCCA (called an Iterative SCCA (ISCCA)) on block ciphers in which theoretical and practical aspects are explained and the requirements are listed. On the theoretical side, we use extraction of quadratic equations, recognition of iterated chosen plaintexts, and cube iteration to improve …
Published in Journal of Computer Technology & Applications · Vol. 5, Issue 3, 2014 · pp. 31–45 Read article
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Dynamic deformation and microstructural characteristics of AA5083 under the influence of electrochemical behaviour using equal channel angular pressing
Abstract: Large-scale Equal channel angular pressing is a great engineering material that has more potential for AA5083 industrial applications. Uniaxial dynamic compressive tests across a temperature of 448 K were conducted for the ECAP technique AA5083 in order to create such a design framework. The microstructure was described using transmission electron microscopy and scanning electron microscope both before and after dynamic loading. The plastic flow behaviour of the AA5083 was described …
Published in Journal of Polymer & Composites · Vol. 12, Issue 1, 2024 · pp. 95–112 Read article