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387 articles for “frequency-based”
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Study on the Rocking Phenomenon of Parachute Rope
Abstract: With the constant development of computer technology and the development of numerical simulation techniques, the simulation of the dynamics of the parachute is becoming increasingly accurate. To eliminate the effects of large deformation of the grid in the conventional parachute simulation, we chose the parachute model using the smooth particle hydrodynamics method and performed a steady-state fluid-solid coupling numerical simulation, which is in good agreement with the calculated gas power …
Published in Trends in Mechanical Engineering & Technology · Vol. 15, Issue 2, 2025 · pp. 1–7 Read article
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Quantitative Image-Based Assessment of Degradation Patterns in Polymer-Based Medical Implants
Abstract: Polymer-based medical devices are widely used in clinical practice, where long-term material degradation can compromise performance and patient safety. Traditional polymer degradation studies predominantly rely on laboratory-based experiments, which often fail to capture real-world operational and usage conditions. In this study, a multimodal, data-driven framework is proposed for the quantitative assessment of degradation patterns in polymer-based medical devices using publicly available clinical failure data. Structured operational parameters, including cumulative usage …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 1510–1518 Read article
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Review of IoT Based Smart Housekeeping Robot
Abstract: AbstractThis project has reviewed and implemented an internet of things (IoT) based indoor mobile robot. The robot is used for the housekeeping service through wireless fidelity (Wi-Fi) and called as “smart housekeeper”. The aim of the project is to implement IoT technology for housekeeping robot working as smart. The robot is equipped with wheel structure, camera holding structure and arm lifting machinery. It applies ATmega32 as the main controller and …
Published in Recent Trends in Electronics Communication Systems · Vol. 5, Issue 1, 2018 · pp. 1–6 Read article
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Nonlinear Channel Equaliser using Discrete Gabor Transform
Abstract: ABSTRACTThe adaptive equaliser makes use of adaptive digital filters whose filter coefficients are modified depending on the channel characteristics at the front end of the receiver. The noise introduced in the channel gets nullified and hence the signal-to-noise ratio of the receiver improves. Discrete Gabor Transform (DGT) helps decorrelate input data because of which the convergence speed of the Mean Square Error (MSE) improves considerably. It is found that the …
Published in Journal of Computer Technology & Applications · Vol. 1, Issue 1-3, 2011 · pp. 63–74 Read article
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Design and Development of a Multifunction FPGA-based Data Acquisition System using Nonlinear Duty-cycle Modulation Technique
Abstract: AbstractA new generation of DAQ based on duty-cycle modulation technique is presented. It describes the design and prototyping of a FPGA-based data acquisition and signal generation board using the duty-cycle modulation technique and with computer-based software interface. The system is built around the DE0-Nano development board that embeds an Altera cyclone IV FPGA in which a NIOS II processor running at 100 MHz has been instantiated. The conversion technique from …
Published in Journal of Electronic Design Technology · Vol. 10, Issue 3, 2019 · pp. 8–26 Read article
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Prevalence and Predictors of Goiter among 6–12 years Old Children in Eastern Tigray Region, Northern Ethiopia: A Community-based Cross-sectional Study
Abstract: Iodine deficiency disorder (IDD) is the collective name of endemic goiter and endemic cretinism. Goiter is the main preventable major public health problem worldwide during pregnancy and childhood in an environment where iodine is deficient. The aim of this study was to assess the prevalence rate and associated factors of goiter among 6–12 years old children in eastern Tigray region, Northern Ethiopia. We used community-based cross-sectional survey. The study population …
Published in Research and Reviews : A Journal of Medical Science and Technology · Vol. 6, Issue 2, 2017 · pp. 52–60 Read article
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Comparative Analysis of MCNN and RCNN for Speech Emotion Recognition Using Gender Information
Abstract: Speech emotion recognition is a speech processing task and a computer-based approach designed to identify and classify the emotions conveyed in audio signals. The aim of this system is to evaluate a speaker's emotional state, such as happiness, anger, sadness, or frustration, by analyzing their speech patterns, which include prosodic features like pitch, frequency, and rhythm. Speech emotion recognition is used in various real-life scenarios that include Customer Service, Healthcare, …
Published in Journal of Communication Engineering & Systems · Vol. 15, Issue 1, 2025 · pp. 1–10 Read article
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A Physics-Informed Graph Neural Network Framework for Real- Time Thermal-Aware Fault Prediction and Adaptive Power Optimization in Heterogeneous System-on-Chip Architectures
Abstract: Heterogeneous System-on-Chip (SoC) architectures are increasingly adopted in edge computing, artificial intelligence, autonomous systems, and high-performance embedded platforms due to their superior computational efficiency and flexibility. However, increasing integration density and workload diversity introduce severe thermal hotspots, accelerated device degradation, and unexpected hardware faults that adversely affect system reliability and energy efficiency. This study proposes a Physics-Informed Graph Neural Network (PI-GNN) framework for real-time thermal- aware fault prediction and adaptive …
Published in Journal of VLSI Design Tools and Technology · Vol. 16, Issue 2, 2026 · pp. 19–28 Read article
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True Random Number Generators Using A Postprocessor, Jitter Metastability, Tree-based Interleaver & Low-power CMOS inverter Circuit prototype technology: An Efficient Analysis
Abstract: TRNGs (True Random Number Generators) are cryptographic primitives that generate random numbers for critical operations. The goal of this study is to create a TRNG using a ring oscillator, analyse different calibration generating ways using VHDL spice simulation, and investigate the TRNG's essential design features, such as area, entropy, and power/energy consumption, using suggested and published methods. Random ones and zeros are produced using RO jitter and DCM frequency fluctuations. …
Published in Journal of Microcontroller Engineering and Applications · Vol. 10, Issue 1, 2023 · pp. 66–76 Read article
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Integrating RF Technologies for Robust Disaster Response and Recovery Systems
Abstract: In the aftermath of disasters, one of the greatest challenges is the failure of communication networks, which delays rescue operations and worsens human suffering. Radio Frequency (RF) technologies offer promising solutions as they enable wireless communication, sensing, and tracking without depending on fragile infrastructure. This paper presents a study of RF applications in disaster management and proposes a unique hybrid multi-layer framework that integrates environmental RF sensors, RFID-based tracking, drone-mounted …
Published in International Journal of Radio Frequency Innovations · Vol. 3, Issue 2, 2025 · pp. 24–27 Read article
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Photoluminescence of Borate Based Phosphors
Abstract: With the increasing advancement in the field of Photoluminescence and its utilization in borate-based phosphors due to its wide diversity and advanced features compared to other types of luminescence. The optical range of the photoluminescence and furthermore the reliance of its force on the illumination power and gadget temperature can convey significant data for gadget portrayal. The release of light caused by another source of light shining on a substance …
Published in Journal of Semiconductor Devices and Circuits · Vol. 10, Issue 2, 2024 · pp. 26–35 Read article
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Subclinical Significant High Serum Immunoglobulin E Response to 20 Allergens: Age and Gender Based Study
Abstract: Background: Antigen-immunoglobulin E (IgE) reaction is an example of immediate allergic reactions. High serum IgE levels were reported in many diseases that linked to the multiple allergens. Objectives: This study aimed to measure the serum IgE against 20 allergens in patients who had a previous history of allergy due to unidentified precipitating factors. Methods: This retrospective study was conducted at the Al Zahraa Consultant Center for Allergy and Asthma that …
Published in Research and Reviews : A Journal of Immunology · Vol. 9, Issue 3, 2019 · pp. 1–6 Read article
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Avian Echoes: Convolutional Neural Network for Bird Vocalization Detection
Abstract: Bird species identification is a complex task within ornithology that demands advanced technological solutions. This research presents an approach leveraging Convolutional Neural Networks (CNNs) for bird species recognition based on identification of bird sound, each employing unique datasets and methodologies. The objective involves a two-stage identification process, beginning with the construction of an ideal dataset. The crucial step involves converting 1D audio waveforms to 2D spectrograms, enhancing CNNs' ability to …
Published in Journal of Aerospace Engineering & Technology · Vol. 14, Issue 2, 2024 · pp. 26–37 Read article
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Design and Analysis of Automobile Hood
Abstract: Bonnet is a main component of front portion of a car one which is used for many purposes. It is usedto decorate the car and add luxurious look. Bonnet is made in aerodynamic shape to reduce airresistance. Bonnet generally used to cover car engine. Therefore, the bonnet system is an accesspanel to the engine compartment to enable maintenance of power train, drive belts, battery, fluidlevels and lamp units, and it …
Published in Journal of Production Research & Management · Vol. 11, Issue 1, 2021 · pp. 42–52 Read article
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Design and Performance of Semiconductor-Biosensor
Abstract: In this work, a high electron mobility transistor (HEMT) based biosensor is designed to detect the virus-protein. In this work, all the simulation-studies are carried out in the SILVACO-ATLAS physical simulator using the following models: Shockley Read Hall (SRH), band gap narrowing, Auger recombination, and Fermi Dirac statistics. Newton trap numerical solver is used in the device simulation. Conduction band engineering of the biosensor is studied. DC and RF properties …
Published in Journal of Semiconductor Devices and Circuits · Vol. 8, Issue 2, 2021 · pp. 1–13 Read article
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Smart Trolley System for Retail Stores: A Node MCU-Based Approach for IoT Integration
Abstract: This project report presents the design, development, and implementation of an RFID and IoT-based Smart Trolley System. The project is a collaborative effort undertaken by a group of dedicated individuals. The primary objective is to enhance the traditional shopping experience by leveraging advanced technologies to improve efficiency, convenience, and data analytics in retail environments. The Smart Trolley System integrates Radio-Frequency Identification (RFID) technology and the Internet of Things (IoT) to …
Published in Journal of Semiconductor Devices and Circuits · Vol. 11, Issue 2, 2024 Read article
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Assessment of Hygiene Degradation and Expiry Indicators in Household Bedding Products
Abstract: Household bedding products such as pillows, bedsheets, blankets, and mattresses play a crucial role in ensuring comfort, sleep quality, and overall health. However, prolonged use without timely replacement or proper maintenance can result in hygiene degradation, leading to the accumulation of dust, allergens, microorganisms, and chemical wear. This study aims to assess the factors contributing to hygiene decline and to identify reliable indicators of expiry for common bedding items. The …
Published in International Journal of Environmental Noise and Pollution Control · Vol. 4, Issue 1, 2026 · pp. 33–47 Read article
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Circuit Topologies, Operation, Control Schemes and Modulation Techniques of Modular Multilevel Inverter
Abstract: The Modular Multilevel Converter (MMC) is one of the developing topology. MMC has several attractive features such as a modular structure, transformer-less operation, easily scalable in terms of voltage and current, low expense for redundancy and fault tolerant operation and excellent output waveforms quality. Due to these attractive features industry and researcher increased the interest in this converter. This interest results in the development of new power topologies, modulation strategies …
Published in Journal of Power Electronics and Power Systems · Vol. 7, Issue 1, 2017 · pp. 28–40 Read article
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On The Energization and Steady-State Performance of 6-Pulse Diode Bridge Rectifiers Supplying Constant Voltage Loads
Abstract: The paper addresses the analysis of 3-phase 6-pule diode bridge rectifier circuits supplying a special load category representable by constant voltage sources. The applied Mathematica-based solution technique can handle symmetrical and unsymmetrical 3-phase voltages. The presented results include the phase currents on the AC side as well as the magnitude and wave shape of the output current on the DC side. Several case studies demonstrating the impact of the source’s …
Published in Trends in Electrical Engineering · Vol. 11, Issue 1, 2021 · pp. 14–23 Read article
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Three-phase squirrel cage induction motor employing PLC-based Star-Delta starter
Abstract: This presentation discusses the significance of regulating beginning current and torque while finally beginning a motor. A multiple doubly fed induction motor may be started using a variety of methods. In addition, a star-delta technique utilising a reconfigurable controller (PLC) is described and evaluated to begin the Actuator Throughout the beginning process of a squirrel cage induction motor, the predominant and start contactors remain suspended and establish the circuit. This …
Published in Trends in Electrical Engineering · Vol. 12, Issue 1, 2022 · pp. 52–61 Read article