Katalog Czasopism

• Autoencoder application for anomaly detection in power consumption of lighting systems

  Publikacja

  • T. Śmiałkowski
  • A. Czyżewski

  - IEEE Access - Rok 2023

  Detecting energy consumption anomalies is a popular topic of industrial research, but there is a noticeable lack of research reported in the literature on energy consumption anomalies for road lighting systems. However, there is a need for such research because the lighting system, a key element of the Smart City concept, creates new monitoring opportunities and challenges. This paper examines algorithms based on the deep learning...

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• 5G Millimeter Wave Network Optimization: Dual Connectivity and Power Allocation Strategy

  Publikacja

  • A. Fayad
  • T. Cinkler
  • J. Rak

  - IEEE Access - Rok 2023

  The fifth generation (5G) of mobile networks utilizing millimeter Wave (mmWave) bands can be considered the leading player in meeting the continuously increasing hunger of the end user demands in the near future. However, 5G networks are characterized by high power consumption, which poses a significant challenge to the efficient management of base stations (BSs) and user association. Implementing new power consumption and user...

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• Design of Frequency-Reconfigurable Branch-Line Crossover Using Rectangular Dielectric Channels

  Publikacja

  • R. K. Barik
  • S. Kozieł
  • E. Bernhardsson

  - IEEE Access - Rok 2023

  This paper presents an efficient yet straightforward passive reconfiguration technique to tune the operating frequency of a branch-line crossover (BLCO). The underlying principle is to fill rectangular dielectric channels (RDCs) prepared beforehand with either air or materials of different relative permittivity. Two configurations (one RDC and three RDCs in each arm) of the branch-line crossover are employed to estimate the tunability...

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• A Cross-Polarisation Discrimination Analysis of Off-Body Channels in Passenger Ferryboat Environments

  Publikacja

  • S. J. Ambroziak (dawniej: S. Ambroziak)
  • K. Cwalina
  • P. Rajchowski
  • F. D. Cardoso
  • M. M. Ferreira
  • L. M. Correia

  - IEEE Access - Rok 2022

  There is a need for investigating radio channels for Body Area Networks considering the depolarisation phenomenon and new types of environments, since these aspects are becoming very important for systems design and deployment. This paper presents an analysis of cross-polarisation discrimination for off-body channels based on a measurement campaign performed in a passenger ferryboat, i.e., where all walls, floors and ceilings are...

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• QRS Morphology-Based EDR Signal—Factors Determining its Properties

  Publikacja

  • P. Przystup
  • A. Poliński
  • J. Wtorek

  - IEEE Access - Rok 2022

  Respiration-induced signals contain a clinically significant information. It could be obtained utilizing both direct and indirect methods. ECG-Derived Respiration (EDR) method is the latter one. However, in this case, two approaches could be distinguished. First one is based on determining changes in the morphology of QRS complexes while the second one is based on the Respiratory Sinus Arrhythmia (RSA) mechanism. The former approach...

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• Highly-Miniaturized Dual-Mode Bandpass Filter Based on Quarter-Mode Substrate Integrated Waveguide with Wide Stopband

  Publikacja

  • R. K. Barik
  • S. Kozieł
  • S. Szczepański

  - IEEE Access - Rok 2022

  This paper presents a novel design of a highly-miniaturized dual-mode bandpass filter (BPF) employing a quarter-mode substrate integrated waveguide (QMSIW). The QMSIW resonator is based on a square cavity with metallic vias along two sides, and open-ended edges at the remaining sides that contain orthogonal feed lines. An open slot is introduced along the two sides of the square cavity with metallic vias to form a magnetic wall....

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• A Model-Order Reduction Approach for Electromagnetic Problems With Nonaffine Frequency Dependence

  Publikacja

  • G. Fotyga

  - IEEE Access - Rok 2021

  The aim of this paper is to present a novel model-order reduction (MOR) technique for the efcient frequency-domain nite-element method (FEM) simulation of microwave components. It is based on the standard reduced-basis method, but the subsequent expansion frequency points are selected following the so-called sparsied greedy strategy. This feature makes it especially useful to perform a fast-frequency sweep of problems that lead...

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• Scoreboard Architectural Pattern and Integration of Emotion Recognition Results

  Publikacja

  • A. Landowska
  • G. Brodny

  - IEEE Access - Rok 2019

  This paper proposes a new design pattern, named Scoreboard , dedicated for applications solving complex, multi-stage, non-deterministic problems. The pattern provides a computational framework for the design and implementation of systems that integrate a large number of diverse specialized modules that may vary in accuracy, solution level, and modality. The Scoreboard is an extension of Blackboard design pattern and comes under...

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• Overview of Approaches for Compensating Inherent Metamaterials Losses

  Publikacja

  • B. Esmail
  • S. Kozieł
  • S. Szczepański
  • H. Majid

  - IEEE Access - Rok 2022

  Metamaterials are synthetic composite structures with extraordinary electromagnetic properties not readily accessible in ordinary materials. These media attracted massive attention due to their exotic characteristics. However, several issues have been encountered, such as the narrow bandwidth and inherent losses that restrict the spectrum and the variety of their applications. The losses have become the principal limiting factor...

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• Reinforcement Learning Algorithm and FDTD-based Simulation Applied to Schroeder Diffuser Design Optimization

  Publikacja

  • A. Kurowski
  • B. Kostek

  - IEEE Access - Rok 2021

  The aim of this paper is to propose a novel approach to the algorithmic design of Schroeder acoustic diffusers employing a deep learning optimization algorithm and a fitness function based on a computer simulation of the propagation of acoustic waves. The deep learning method employed for the research is a deep policy gradient algorithm. It is used as a tool for carrying out a sequential optimization process the goal of which is...

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• Timber Frame Houses with Different Insulation Materials - Seismic Analysis

  Publikacja

  • M. Szczepański
  • W. Migda
  • R. Jankowski

  - IEEE Access - Rok 2017

  The aim of this article is to present results of a dynamic numerical analysis focused on the response of two timber frame building structures exposed to seismic excitations. The first structure was insulated with mineral wool, while the second one with polyurethane foam. Specifications and technology involved in the models' construction are based on the previously conducted experimental study, upon which numerical structural models...

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• Position and Orientation Estimation in Radio Network With Groups of Locally Synchronized Nodes

  Publikacja

  • J. Sadowski
  • J. Stefański

  - IEEE Access - Rok 2023

  This article presents a positioning system with groups of locally synchronized nodes. A mobile object is equipped with a group of several synchronized receivers that are able to measure the difference in the time of arrival of signals from reference transmitters. The reference transmitters are synchronized only in local groups, with no global synchronization between groups. It is assumed that the synchronous operation of transmitters...

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• Practical Trial for Low-Energy Effective Jamming on Private Networks With 5G-NR and NB-IoT Radio Interfaces

  Publikacja

  • P. Skokowski
  • K. Malon
  • M. Kryk
  • K. Maślanka
  • J. M. Kelner
  • P. Rajchowski
  • J. Magiera

  - IEEE Access - Rok 2024

  Fourth-generation (4G) mobile networks are successively replaced by fifth-generation (5G) ones, based on the new releases of the 3rd Generation Partnership Project (3GPP) standard. 5G generation is dedicated to civilian users and the conducted analytical work shows that it has numerous technological gaps that prevent its direct implementation in military communications systems. However, the recent armed world conflicts showed that...

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• CNN-CLFFA: Support Mobile Edge Computing in Transportation Cyber Physical System

  Publikacja

  • A. Bhansali
  • R. Kumar Patra
  • P. Bidare Divakarachari
  • P. Falkowski-Gilski
  • G. Shivakanth
  • S. N. Patil

  - IEEE Access - Rok 2024

  In the present scenario, the transportation Cyber Physical System (CPS) improves the reliability and efficiency of the transportation systems by enhancing the interactions between the physical and cyber systems. With the provision of better storage ability and enhanced computing, cloud computing extends transportation CPS in Mobile Edge Computing (MEC). By inspecting the existing literatures, the cloud computing cannot fulfill...

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• Compact Substrate-Integrated Hexagonal Cavity-Backed Self-Hexaplexing Antenna for Sub-6 GHz Applications

  Publikacja

  • V. Jayaprakash
  • C. Ds
  • R. K. Barik
  • S. Kozieł

  - IEEE Access - Rok 2024

  A self-multiplexing SIW antenna based on hexagonal SIW cavity is proposed. The self-hexaplexing antenna consists of different sizes of resonating elements, which provide the hexaband operations. The antenna resonates at 5 GHz, 5.17 GHz, 5.32 GHz, 5.53 GHz, 5.62 GHz, and 5.72 GHz by employing different slot lengths between the resonating elements. The proposed antenna provides the individual tunable characteristics of the operating...

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• Multiscalar Control Based Airgap Flux Optimization of Induction Motor for Loss Minimization

  Publikacja

  • T. Ayana
  • M. Morawiec
  • L. Wogi

  - IEEE Access - Rok 2024

  Based on the induction motor model, considering the core loss resistance that accounts for magnetic characteristic saturation, a speed control approach is devised with an adaptive full-order (AFO) speed observer. The induction motor model analysis is done sincerely in a stationary reference frame. The control approach incorporates a flux reference generator designed to meet optimal operational circumstances and a nonlinear speed...

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• An Optimized Ka-Band Low Profile Dual-Polarized Transmitarray Antenna With 2D Beam Switching

  Publikacja

  • S. H. Ramazannia Tuloti
  • A. Lamęcki
  • M. Mrozowski

  - IEEE Access - Rok 2024

  This article presents an optimized dual-polarized transmitarray antenna (TA) designed for MIMO applications at the Ka-band, capable of switching beams in two directions. The antenna aperture uses a small unit cell with three layers of Taconic RF-35 dielectric substrates, which can be easily fabricated using PCB technology. The unit cell achieved a 360-degree phase shift and a transmission magnitude exceeding –0.4 dB at 28 GHz....

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• Looking through the past: better knowledge retention for generative replay in continual learning

  Publikacja

  • V. Khan
  • S. Cygert
  • K. Deja
  • T. Trzciński
  • B. Twardowski

  - IEEE Access - Rok 2024

  In this work, we improve the generative replay in a continual learning setting to perform well on challenging scenarios. Because of the growing complexity of continual learning tasks, it is becoming more popular, to apply the generative replay technique in the feature space instead of image space. Nevertheless, such an approach does not come without limitations. In particular, we notice the degradation of the continually trained...

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• Infographics in Educational Settings: A Literature Review

  Publikacja

  • S. A. Bhat
  • S. Alyahya

  - IEEE Access - Rok 2024

  Infographics are visual representations of data that utilize various graphic elements, including pie charts, bar graphs, line graphs, and histograms. Educators and designers can maximize the potential of infographics as powerful educational tools by carefully addressing challenges and capitalizing on emerging technologies. However, current education systems showcase the need for development guidelines and the best practices targeted...

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• Comparison of Doppler Effect Estimation Methods for MFSK Transmission in Multipath Hydroacoustic Channel

  Publikacja

  • A. Czapiewska
  • A. Łuksza
  • R. Studański
  • Ł. Wojewódka
  • A. Żak

  - IEEE Access - Rok 2024

  Underwater wireless communication remains a challenging topic, particularly for applications such as wreck penetration where multipath and Doppler effects are very intense. These effects are becoming even more difficult to mitigate for fast data transmission systems that utilize wideband signals. Due to the low propagation speed of acoustic wave in the water, there is a significant difference between the Doppler shift for lower...

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