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379 articles for “Frequency analysis”
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Harmonic Analysis of Arterial Blood Pressure Signal Using Fourier Decomposition for Autonomic Health Assessment
Abstract: AbstractIn the present study, the arterial blood pressure waveform is decomposed utilizing Fourier to examine the fundamental frequency and to build up a linkage for autonomic health assessment. This methodology will produce practically identical fundamental frequency, either utilizing noninvasively recorded photoplethysmogram (PPG) or the blood pressure signal. In order to normalize the both, signal PPG waveform is approximated to arterial blood pressure waveform by nonlinear fitting blood pressure values to …
Published in Current Trends in Signal Processing · Vol. 7, Issue 3, 2017 · pp. 7–14 Read article
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Experimental Analysis of Rectangular and Circular Microstrip Patch Antenna with Superstrates
Abstract: This paper focusing on the experimental analysis of rectangular and circular microstrip patchantennas with and without radome (superstrate). The proposed antennas were designed at2.4GHz, using HFSS simulation software and fabricated on Arlon DiClad 880 substratewhose dielectric constant is 2.2, loss tangent is 0.0009 and thickness of the substrate is1.6mm. Placing different dielectric constant of the superstrates above the patch antennasperformance characteristics have been studied of both antennas on the basis …
Published in Recent Trends in Electronics Communication Systems · Vol. 7, Issue 3, 2020 · pp. 34–45 Read article
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On the Optimisation of fundamental frequency to determine the Optimal Design of Bracing System for A Three Storey One Bay Two Dimensional Planar Structure
Abstract: Bracing systems are useful to improve the resistance of multi-storey buildings subjected to wind forces acting in lateral direction on the structure. The main focus of this paper is to find the optimal design of the bracing for a three storey one bay two dimensional planar structure. The eigen frequency of the structure is maximized to determine the relative density using a stress based criteria of each element for every …
Published in Journal of Experimental & Applied Mechanics · Vol. 9, Issue 3, 2018 · pp. 55–59 Read article
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Reading Habits Among the Students of ABK High School Boys and Girls, AMU: A Comparative Study
Abstract: This study explores the reading habits of students from ABK Union High School, affiliated with Aligarh Muslim University, focusing on both boys' and girls' sections. The primary aim is to understand the preferences, attitudes, and challenges students face regarding reading. Specifically, this research examines the factors that influence their reading habits, such as the availability of reading material, time management, and the role of technology. Data were collected using a …
Published in Journal of Advancements in Library Sciences · Vol. 11, Issue 3, 2024 · pp. 14–23 Read article
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Selection of Appropriate Porous Material for Designing and Developing Hybrid Absorptive Muffler: A Wave 1-D Based Approach
Abstract: In this study, glass wool and rock wool are used as sound-absorbing materials to assess the sound transmission loss (STL) of hybrid absorptive mufflers. Improving the muffler's acoustic performance and assessing how well these materials attenuate noise are the main goals. Rock wool, which offers greater thermal resistance and broader frequency absorption, is contrasted with glass wool, which is renowned for its lightweight construction and high-frequency absorption. Wave 1-D simulation …
Published in Journal of Polymer & Composites · Vol. 13, Issue 3, 2025 · pp. 148–160 Read article
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Effectiveness of Structured Teaching Programme on Menstrual Hygiene among Adolescent Girls
Abstract: A vital aspect of health education for adolescent girls in menstrual hygiene. An effective menstrualhygiene helps to achieve millennium development goals two (universal education), three (genderequality and women empowerment) and five (improving maternal health) directly or indirectly.Adolescent girls often have lack of knowledge regarding menstrual hygiene and reproductive health.The aim of the present study is to assess the level of knowledge among adolescent girls regardingmenstrual hygiene. A quasi experimental design …
Published in Journal of Nursing Science & Practice · Vol. 12, Issue 1, 2022 · pp. 1–6 Read article
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Enhancing Seismic Resilience of a Nine-Storey Composite Column Building Through Base Isolation Techniques: A Comparative Analysis
Abstract: Earthquakes pose significant threats to both human lives and structures, necessitating thorough dynamic analysis for earthquake-prone buildings. Such analyses are crucial for designing earthquakeresistant structures that can withstand seismic forces. One effective strategy employed to mitigate the destructive effects of earthquakes is the implementation of base isolation techniques. Base isolation involves the installation of isolators and energy-absorbing devices beneath the building's superstructure, aiming to provide structural safety and enhance the …
Published in Journal of Structural Engineering and Management · Vol. 10, Issue 2, 2023 · pp. 47–55 Read article
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Design and Vibrational Analysis of Power Transmission by Stepless Friction Drive
Abstract: The design detailed analysis of vibration of a stepless friction drive-based power transfer mechanism are presented in this work. A load, a stepless friction drive, and a motor make up the system. To assure the system's effectiveness and dependability, the stepless frictionless drive is constructed using a mix of theoretical computations and is examined using an FFT analyzer. The vibrational assessment is carried out to assess how the system reacts …
Published in Journal of Experimental & Applied Mechanics · Vol. 14, Issue 1, 2023 · pp. 41–56 Read article
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Design and Performance Analysis of Natural Rubber–Silica Nanocomposite Vibration Isolators for Household Appliances
Abstract: Natural rubber (NR) nanocomposites reinforced with surface-modified precipitated silica (SiO2) were synthesized through a two-roll mill compounding and compression-moulding process, then systematically evaluated as passive vibration isolator materials for domestic washing machine applications. Five silica loadings 0, 5, 10, 15, and 20 phr were investigated. A comprehensive characterization suite encompassing tensile testing, Shore A hardness, dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) revealed clear structure–property …
Published in Journal of Polymer & Composites · Vol. 14, Issue 3, 2026 · pp. 554–560 Read article
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Thermo-Mechanical Vibration Analysis of Simply Supported Laminated and Flat Plates Under Harmonic Loading
Abstract: This paper delves into a numerical exploration of the vibration characteristics and frequency response of two types of plates: a simply supported rectangular laminated plate and a simply supported flat plate. These plates are subjected to concentrated harmonic forces within a thermal environment. The determination of the critical buckling temperature guides the assessment of thermal load effects. Analytical formulations, incorporating first-order shear deformation theory (FSDT) to consider shear deformation and …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 1519–1530 Read article
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Mathematical Modeling Analysis of India's Accident &Use of Fly Ash and Polymers in Road Safety
Abstract: Accident predicting models (APMs) are exceptionally strong tools for adaptation and mitigation strategies because they have the ability to predict both the severity and frequency of crashes. Road accidents are a major problem all throughout the world, especially in developing countries. Understanding the key variables that contribute can assist in reducing the frequency of traffic collisions. This study also discovered recent developments on fly ash, green composites, other polymer materials …
Published in Journal of Polymer & Composites · Vol. 13, Issue 1, 2025 · pp. 488–499 Read article
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A Comparative Analysis of Graphene Based Terahertz Reconfigurable Antennas: A Review
Abstract: In this paper, an overview of various reconfigurable antenna designs based on graphene material utilized for terahertz applications is presented. Terahertz electromagnetic spectrum is the term used to describe the frequency range between 0.1 and 10 THz. A promising material for THz reconfigurable antennas, graphene has a low skin effect and a built-in ability to tune by chemical or electrostatic gating. This study reviews the development of reconfigurable antenna for …
Published in Journal of Polymer & Composites · Vol. 11, Issue 5, 2023 · pp. 44–55 Read article
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Improve Power Quality in Photovoltaic and Wind Energy Systems Through the Utilization of DSTATCOM
Abstract: This paper explores the power quality challenges faced by distributed generation systems that are powered by renewable energy sources, e.g., wind and solar. It provides an in-depth examination of these power quality issues, starting with an overview and examination of basic standards. The research also explores power quality in power systems, specifically those connected to the electrical grid and renewable energy sources. It gives a comprehensive discussion of power quality …
Published in Journal of Power Electronics and Power Systems · Vol. 15, Issue 2, 2025 · pp. 33–44 Read article
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Viscoelastic Behavior and Wrinkle Formation in Cotton- Polyester Garments: A Data-Driven Approach for Textile Care
Abstract: This study investigates the wrinkle behavior of cotton-polyester blended fabrics by analyzing data from over 1,200 store-handled garments. Integrating concepts from polymer chemistry and computer vision, it aims to establish a smart textile care framework based on fiber-specific wrinkle characteristics. The research identifies how cotton’s hydrophilic and non-elastic structure results in increased wrinkling, while polyester’s thermoplastic and crystalline properties enhance wrinkle resistance. Elastomeric fibers like Lycra contribute to wrinkle recovery …
Published in Journal of Polymer & Composites · Vol. 13, Issue 4, 2025 · pp. 50–60 Read article
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Design and Implementation of 256-bit Vedic Multiplier on Reconfigurable Platform
Abstract: Multiplication is a fundamental arithmetic operation in digital signal processing and embedded systems. Traditional multiplier architectures often suffer from increased latency and resource utilization when scaled to higher bit widths. Vedic Mathematics, an ancient Indian technique, offers a novel and efficient alternative. This paper presents the design and implementation of a 256-bit Vedic multiplier using the Urdhva Tiryakbhyam Sutra on a reconfigurable hardware platform, specifically FPGA. The proposed architecture decomposes …
Published in Journal of Materials & Metallurgical Engineering · Vol. 15, Issue 3, 2025 · pp. 56–65 Read article
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Delta Sigma Fractional N Frequency Synthesis
Abstract: Frequency synthesizers are fast becoming essential for several broadcast bands and circuits as communication technology hasimproved. To meet this need, the fractional N frequency synthesizer was created. This synthesizer has proven its supremacy as a noteworthyinnovation by permitting various improvements over comparable concepts. Only when it is combined with delta-sigma modulation is thispossible. This combi- national circuit enhances frequency resolution and noise performance. PLL-based frequency synthesis is often used toproduce …
Published in Journal of VLSI Design Tools and Technology · Vol. 13, Issue 2, 2023 · pp. 12–20 Read article
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Improvement of BER in Wavelet Transform-based OFDM System with Kalman Filter
Abstract: AbstractWe know that bandwidth is the most precious commodity in all communication systems such as 2G, 3G and 4G. Each service provider is now searching how to accommodate a large number of users within a limited allocated bandwidth, In order to increase the data rate of wireless medium with higher performance, orthogonal frequency division multiplexing (OFDM) is chosen. In this paper, the bit error rate analysis (BER) of discrete wavelet …
Published in Journal of Communication Engineering & Systems · Vol. 4, Issue 1, 2014 · pp. 21–28 Read article
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Voluntary Blood Donation, Future Willingness and Associated Factors Among Attendants of Obstetrics and Gynecology Patients in JIMA University Specialized Hospital, Oromia region, Ethiopia, 2015
Abstract: Background: Hemorrhage is the major cause of maternal death worldwide. This problem is more prevalent in developing countries including Ethiopia. Therefore, availability of adequate blood supply and timely transfusion has paramount importance in reducing maternal deaths. In this aspect, assessing practice, future willingness and associated factors towards voluntary blood donation among attendants can contribute in alleviating the scarcity of blood for transfusion.Objective: To assess voluntary blood donation, future willingness and …
Published in Research and Reviews : Journal of Computational Biology · Vol. 6, Issue 3, 2017 · pp. 1–8 Read article
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Speaker Variations and Vocal Disguise
Abstract: The process of recognizing the speaker based on parameters like pitch, loudness and other acoustic attributes is called speaker recognition. Speaker recognition is considered to be challenging. The voice changing apps facilitating vocal disguise have further made this process even difficult. The voice changing apps can induce variations, some of these variations may be predominantly different, even though these apps can disguise a person’s voice, certain parameters may stay real …
Published in Research and Reviews: A Journal of Health Professions · Vol. 13, Issue 2, 2023 · pp. 15–19 Read article
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Performance Analysis of Bridgeless Converter Based SMPS used for Welding Application
Abstract: Abstract: This paper deals with performance analysis bridgeless converter based switched mode power supply (SMPS) of improved power quality. Power Factor Correction (PFC) based bridge less SMPS having so many applications in the area of welding power supply with IPC. This topology based on the constant voltage output and output current varied according to load changes. In the proposed topology, it is replaced the front end diode bridge rectifier with …
Published in Journal of Electronic Design Technology · Vol. 10, Issue 1, 2019 · pp. 27–33 Read article