Search
387 articles for “frequency-based”
-
Cybersecurity Early Detection Algorithms for Threats
Abstract: Cybersecurity plays a vital role in protecting digital systems, networks, and data from unauthorized access, misuse, and cyberattacks in an increasingly interconnected world. As reliance on internet-based technologies continues to grow, the frequency and sophistication of cyber threats have also increased, making effective cybersecurity strategies essential. Cybersecurity encompasses a comprehensive framework that integrates technological solutions, organizational processes, and human awareness to ensure the confidentiality, integrity, and availability of information. Key …
Published in Journal Of Network security · Vol. 14, Issue 1, 2026 · pp. 31–37 Read article
-
ECG De-noising Techniques and Optimal Feature Selection Using Principle Component Analysis
Abstract: AbstractECG (Electrocardiography) is used to record and determine the condition of the heart. This paper provides an overview of various ECG de-noising techniques that are used to eliminate different type of noises; therefore, noise reduction procedure to be performed to eliminate different type of noises such as baseline wander, dc offset and high frequency interference, and then the pre-processed signal is used to extract features from the ECG signal. This …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 5, Issue 1, 2018 · pp. 14–20 Read article
-
Design of a Capacitive Loaded and Composite Split Ring Resonator Based Monopole Patch Antenna
Abstract: AbstractHere we have designed a monopole antenna at 2.8 GHz frequency and then we have loaded a metamaterial unit cell at the top of the monopole antenna and the same unit cell is also used as composite split ring resonator (CSRR) and incorporates with the same antenna. In both of the cases we have calculate the resonant frequency and gain of the antenna.Keywords: Metamaterials, microwave filters, splitring resonators (SRRs)\Cite this …
Published in Current Trends in Signal Processing · Vol. 8, Issue 1, 2018 · pp. 23–27 Read article
-
Development of Slip Power Recovery Scheme sing Buck-Boost Chopper for Performance enhancement of Wound Rotor IM Drive
Abstract: This paper presents the mathematical modeling and testing of wound rotor induction motor drive (WRIMD) to develop the slip power recovery scheme (SPRS) using buck-boost chopper control techniques improving the performance of drive. The main focus of this research work is on the understanding of methodological development of Simulink model of SPRS. Various mathematical equations describing performance characteristics of WRIMD using SPRS with buck-boost chopper are derived. The performance parameters …
Published in Journal of Power Electronics and Power Systems · Vol. 12, Issue 2, 2022 · pp. 44–63 Read article
-
Fuzzy Logic System Based MPPT to Improve the Accuracy, Reliability and Power Quality of Grid Integrated Photovoltaic (PV) System
Abstract: Abstract: In this piece of research, a Fuzzy logic based system is designed for output voltage and frequency control of a Grid Integrated PV System. Photovoltaic (PV) energy generation system provides the opportunity to capture more power than other turbines. Distributed power generation systems based on renewable energy sources are attracting the market. In this regard, grid-connected photovoltaic (PV) plants are becoming a common technology to generate energy and its …
Published in Research & Reviews: A Journal of Embedded System & Applications · Vol. 8, Issue 3, 2020 · pp. 1–9 Read article
-
Flood Risk Assessment and Disaster Management through Data Applications and Engineering Interventions
Abstract: Flooding is the most extreme and well-known destructive tournament and has serious implications for sustainable development. The vast majority of disasters in Africa are caused by floods, which are also the most frequent and widespread calamities. This paper x-rays alternative approaches to catastrophe management and flood risk assessment. Various methodologies, literature reviews and advanced techniques such as remote sensing, indicator-based methods, computer-based methods and utilization of geographic information systems (GIS) …
Published in Journal of Water Resource Engineering and Management · Vol. 9, Issue 2, 2022 · pp. 39–48 Read article
-
Trans Multiplexer as a Bliss to SATCOM System
Abstract: The paper describes the importance and application of trans multiplexer (TMUX) in satellite communication system. Nowadays, the communication system is completely based on multi user system. Generally, cellular communication can be done with a fixed frequency bands which is narrow band system where as satellite communication is based on wide band system, where different standards can be used simultaneously. In this paper, the overall idea of how signal processing is …
Published in Current Trends in Signal Processing · Vol. 7, Issue 1, 2017 · pp. 42–46 Read article
-
Flooding of Urban Drainage Systems: Risk Analysis Study
Abstract: Floods are considered as to be among the most severe natural disasters because of their unpredictability, their overwhelming power and the difficulty to assess the related risks. Consequently, flooding damage is inevitable. This paper focuses on the identification of potential flood hazards in urban drainage systems. The flooding causes and modes are analyzed by two main methods: fault tree and event tree. The frequencies of natural events and operational obstacles …
Published in Journal of Water Resource Engineering and Management · Vol. 6, Issue 3, 2019 · pp. 1–5 Read article
-
Investigation of FPGA based PWM Control Technique for AC Motors
Abstract: This paper proposes a Random Frequency PWM synchronized for a three phase inverter implemented with use of Field Programmable Gate Array (FPGA) and applied to a 1-hp induction motor drive system for the reduction of harmonics and improvement of fundamental peak voltage. For providing alternating output voltage with a specific magnitude and frequency to industrial applications, three-phase inverter is preferred. The gating signals to the inverter are produced by means …
Published in Journal of Power Electronics and Power Systems · Vol. 3, Issue 2, 2013 · pp. 16–22 Read article
-
Robust Design of Damping Controller for Power System using a combination of Flower Optimization algorithm and Optimal Control Theory
Abstract: The power system experience low frequency oscillations due to various disturbances. It is verynecessary to damp these oscillations else it will endanger the system security and stability. High gainand fast acting excitation systems do not provide the necessary damping torque and it can provide thesufficient synchronising torque only. Lack of damping torque causes the oscillations of generator rotor,So, Power system stabilizer (PSS) is used in the proposed work along with …
Published in Journal of Mechatronics and Automation · Vol. 8, Issue 3, 2021 · pp. 15–24 Read article
-
Micro-Doppler Signatures for Human with Orbbec Sensor
Abstract: Micro-movements, such as oscillations, rotations or revolution of an object or structures persuade additional frequency modulations on reinstate radar signal, which generates sidebands about the object’s Doppler frequency, called micro-Doppler effect. Human body mechanics consist of various moving body parts, which generate unique micro-Doppler signatures. Using TFT (time frequency transforms and pattern recognition techniques; we can classify individuals based on their movements using micro-Doppler signatures. Preliminary results from a laboratory …
Published in Journal of Electronic Design Technology · Vol. 12, Issue 1, 2021 · pp. 1–9 Read article
-
Exploring the Architectural Identity and Culture of the Ikwerre Ethnic Group in Rivers State, Nigeria
Abstract: This paper investigates the architectural identity and culture of the Ikwerre ethnic group in Rivers State, through an analysis of traditional practices, spatial organization, and structural forms. This paper provides insights into the relationship between Ikwerre Architecture and Ikwerre culture. The study highlights the unique attributes of Ikwerre identity as expressed in their built environment and cultural practices, to establish the key features of Ikwerre Architectural identity and culture. A …
Published in International Journal of Rural and Regional Development · Vol. 2, Issue 2, 2024 · pp. 46–59 Read article
-
AI-Powered Smart Door Lock System with IoT Integration for Enhanced Home Security
Abstract: An AI-Powered Smart Door Lock System with IoT Integration for Enhanced Home Security system is an advanced security solution that utilizes sensors, microcontrollers, and authentication mechanisms to control access efficiently. This system is designed to enhance security and convenience by eliminating the need for traditional keys, reducing the risks associated with lost or duplicated keys. It operates using various authentication technologies such as RFID (Radio Frequency Identification), fingerprint recognition, and …
Published in Journal of Mechatronics and Automation · Vol. 12, Issue 2, 2025 · pp. 34–38 Read article
-
Reinforcement Learning for Adaptive Sensing with Shape Memory Polymer-Based IoT Nodes
Abstract: The rapid expansion of intelligent sensing in the Internet of Things (IoT) has revealed the pressing need for materials and algorithms capable of self-adaptation in volatile environments. Conventional polymer-based sensors and static control strategies often fail to capture nonlinear thermo-mechanical dynamics, leaving them unsuitable for unpredictable operating conditions. Although prior studies have improved polymer composites or introduced algorithmic optimization independently, few attempts have coupled the adaptability of smart materials with …
Published in Journal of Polymer & Composites · Vol. 13, Issue 6, 2025 · pp. 370–391 Read article
-
Modelling of DFIG-based Wind Energy Conversion System
Abstract: AbstractToday wind energy plays important role in the competitive wind market. In this paper, we study the performance of the overall doubly-fed induction generator (DFIG) system under different conditions. The DFIG technology has proven to be an efficient and cost-effective solution for variable speed wind turbines. This system allows a variable speed operation over a huge range. In this system, rotor windings connected to grid through a bidirectional back-to-back IGBT-based …
Published in Journal of Alternate Energy Sources & Technologies · Vol. 10, Issue 3, 2019 · pp. 59–64 Read article
-
HFSS-Based Helix Antenna Design Optimization and Simulation
Abstract: This project uses HFSS (High-Frequency Structure Simulator) to simulate, develop, and analyze the performance of a helix antenna for (a particular purpose, such as broadband wireless or satellite communication). Because of their distinctive structural characteristics, helix antennas are well-suited for a variety of high-frequency applications by balancing compactness, high gain, and wide bandwidth. In this work, we parametrically analyze important design parameters including pitch, radius, number of turns, and wire …
Published in Recent Trends in Sensor Research & Technology · Vol. 12, Issue 1, 2025 · pp. 29–35 Read article
-
Noise and Vibration Reduction Using Sustainable Polymer Nanocomposite Materials: A Review
Abstract: Noise pollution and structural vibration represent critical challenges in modern engineering systems, affecting human health, operational efficiency, and equipment durability. This review examines the application of sustainable polymer nanocomposite materials for simultaneous noise and vibration reduction across diverse engineering domains. The fundamental relationship between structural vibration and noise generation is established, followed by a comprehensive analysis of sound absorption and damping mechanisms in nanoparticle-reinforced polymer systems. Multi-walled carbon nanotubes (MWCNTs), …
Published in Journal of Polymer & Composites · Vol. 14, Issue 3, 2026 · pp. 785–798 Read article
-
Analysis of Three Phase AC-DC Front End Converter with Vector Control
Abstract: The revolution in power electronics has opened in last few years widespread use of power converters of different power rating from few Watts to Mega-Watts. 3 phase AC-DC converters (Controlled rectifier) are most widely used power converters as the distributed electric power is AC supply, while the applications based on DC supply as well as variable frequency AC supply, need conversion of AC supply into DC supply. Large current harmonics …
Published in Journal of VLSI Design Tools and Technology · Vol. 11, Issue 3, 2021 · pp. 19–30 Read article
-
Machine Learning-Based Channel Estimation in 5G, Beyond-5G, and 6G Networks: Recent Advances and Future Directions
Abstract: Accurate channel estimation is one of the most fundamental challenges in modern wireless communication systems. In fifth- generation (5G) New Radio (NR) and emerging sixth-generation (6G) networks, precise knowledge of the wireless channel is essential for achieving reliable data transmission, high spectral efficiency, and low Bit Error Rate (BER). Conventional estimation techniques such as Least Squares (LS) and Minimum Mean Square Error (MMSE) rely on mathematical channel models and predefined …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 13, Issue 2, 2026 Read article
-
Improved Microstrip Dipole Antenna for Rfid Technology by using Metamaterials
Abstract: This paper explores an innovative way of designing antennas through metamaterial integration and the miniaturization process. In order to boost frequency usability and reduce the antenna size, we propose a new solution. The interaction between the two divided ring resonators with this resonant component is based on this technique. In this experiment, the parameters considered include the resonant frequency, the lack of response, and the wavelength, the amount of radiation, …
Published in Journal of Power Electronics and Power Systems · Vol. 10, Issue 3, 2020 · pp. 1–6 Read article