Rok 2020

• Reinforced Secure Gossiping Against DoS Attacks in Post-Disaster Scenarios

  Publikacja

  • C. Esposito
  • Z. Zhao
  • J. Rak

  - IEEE Access - Rok 2020

  During and after a disaster, the perceived quality of communication networks often becomes remarkably degraded with an increased ratio of packet losses due to physical damages of the networking equipment, disturbance to the radio frequency signals, continuous reconfiguration of the routing tables, or sudden spikes of the network traffic, e.g., caused by the increased user activity in a post-disaster period. Several techniques have...

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• Sensor Position Estimation Method for IoT Using Mobile Reference Node

  Publikacja

  • J. Stefański
  • J. Sadowski

  - IEEE Access - Rok 2020

  The paper proposes an innovative method of locating objects for the Internet of Things (IoT). The proposed method allows the position of a fixed measuring sensor (MS) to be estimated using one mobile base station with a known position moving around the MS. The mathematical analysis of the method, and three algorithms — Newton’s (NA), gradient descent (GD) and genetic (GA) — for solving the system of non-linear positional equations...

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• Ship Collision Risk Assessment Based on Collision Detection Algorithm

  Publikacja

  • D. Liu
  • G. Shi

  - IEEE Access - Rok 2020

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• Simulation-Driven Antenna Modeling by Means of Response Features and Confined Domains of Reduced Dimensionality

  Publikacja

  • A. Pietrenko-Dąbrowska
  • S. Kozieł

  - IEEE Access - Rok 2020

  In recent years, the employment of full-wave electromagnetic (EM) simulation tools has become imperative in the antenna design mainly for reliability reasons. While the CPU cost of a single simulation is rarely an issue, the computational overhead associated with EM-driven tasks that require massive EM analyses may become a serious bottleneck. A widely used approach to lessen this cost is the employment of surrogate models, especially...

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• Stress Monitoring System for Individuals with Autism Spectrum Disorders

  Publikacja

  • M. T. Tomczak (dawniej: M. Tomczak)
  • M. Wójcikowski
  • B. Pankiewicz
  • J. Łubiński
  • J. Majchrowicz
  • D. Majchrowicz
  • A. Walasiewicz
  • T. Kiliński
  • M. Szczerska

  - IEEE Access - Rok 2020

  In this article, a stress monitoring system tailored for individuals with Autism Spectrum Disorders (ASD) and developed for the educational institution is presented. People with ASD face problems with effective stress management due to their high self-perceived levels of stress, poor ability to cope with it, and dificulties with the accurate detection of the source of stress. Consistently, being able to measure stress appears to...

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• The Impact of Lexicon Adaptation on the Emotion Mining From Software Engineering Artifacts

  Publikacja

  • M. Wróbel

  - IEEE Access - Rok 2020

  Sentiment analysis and emotion mining techniques are increasingly being used in the field of software engineering. However, the experiments conducted so far have not yielded high accuracy results. Researchers indicate a lack of adaptation of the methods of emotion mining to the specific context of the domain as the main cause of this situation. The article describes research aimed at examining whether the adaptation of the lexicon...

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• Toward Robust Pedestrian Detection With Data Augmentation

  Publikacja

  • S. Cygert
  • A. Czyżewski

  - IEEE Access - Rok 2020

  In this article, the problem of creating a safe pedestrian detection model that can operate in the real world is tackled. While recent advances have led to significantly improved detection accuracy on various benchmarks, existing deep learning models are vulnerable to invisible to the human eye changes in the input image which raises concerns about its safety. A popular and simple technique for improving robustness is using data...

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• Usability of mobile applications: a systematic literature study

  Publikacja

  • P. Weichbroth

  - IEEE Access - Rok 2020

  Since the release of the first mobile devices, the usability of on-board applications has been the concern not only of software vendors but hardware manufacturers as well. The academia community later willingly joined the discussion on usability in terms of theory and empirical measurement, having experience and knowledge in desktop settings. At first sight, such a background should guarantee a solid foundation to conduct research...

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Rok 2019

• An Enhanced Reduced Basis Method for Wideband Finite Element Method Simulations

  Publikacja

  • D. Szypulski
  • G. Fotyga
  • M. Mrozowski

  - IEEE Access - Rok 2019

  In this paper, we present a novel strategy for selecting expansion points in the reduced basis method. A single computation of the error estimator is used to select a few expansion points in the multi-parameter space simultaneously. The number of selected points is determined adaptively, based on the accuracy of the current reduced model. The reliability and efficiency of this proposed approach are illustrated by numerical tests...

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• Application of Barycentric Coordinates in Space Vector PWM Computations

  Publikacja

  • P. Szczepankowski
  • J. Nieznański

  - IEEE Access - Rok 2019

  This paper proposes the use of barycentric coordinates in the development and implementationof space-vector pulse-width modulation (SVPWM) methods, especially for inverters with deformed space-vector diagrams. The proposed approach is capable of explicit calculation of vector duty cycles, independentof whether they assume ideal positions or are displaced due to the DC-link voltage imbalance. The use ofbarycentric coordinates also...

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• Compensation Topologies in IPT Systems: Standards, Requirements, Classification, Analysis, Comparison and Application

  Publikacja

  • V. Shevchenko
  • O. Husev
  • R. Strzelecki
  • B. Pakhaliuk
  • N. Poliakov
  • N. Strzelecka

  - IEEE Access - Rok 2019

  Wireless power transfer devices are becoming more relevant and widespread. Therefore, an article is devoted to a review, analysis and comparison of compensation topologies for an inductive power transfer. A new classification of topologies is developed. A lot of attention is paid to the problems of the physical fundamentals of compensation work, standards, safety, and five main topology requirements. It is determined, that topologies...

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• Distributed Architectures for Intensive Urban Computing: A Case Study on Smart Lighting for Sustainable Cities

  Publikacja

  • H. Mora
  • J. Peral
  • A. Ferrandez
  • D. Gil
  • J. Szymański

  - IEEE Access - Rok 2019

  New information and communication technologies have contributed to the development of the smart city concept. On a physical level, this paradigm is characterised by deploying a substantial number of different devices that can sense their surroundings and generate a large amount of data. The most typical case is image and video acquisition sensors. Recently, these types of sensors are found in abundance in urban spaces and are responsible...

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• Enabling Deeper Linguistic-based Text Analytics – Construct Development for the Criticality of Negative Service Experience

  Publikacja

  • A. Ojo (dawniej: O. Adegboyega)
  • N. Rizun

  - IEEE Access - Rok 2019

  Significant progress has been made in linguistic-based text analytics particularly with the increasing availability of data and deep learning computational models for more accurate opinion analysis and domain-specific entity recognition. In understanding customer service experience from texts, analysis of sentiments associated with different stages of the service lifecycle is a useful starting point. However, when richer insights...

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• Low-Profile ESPAR Antenna for RSS-Based DoA Estimation in IoT Applications

  Publikacja

  • M. Burtowy
  • M. Rzymowski
  • Ł. Kulas

  - IEEE Access - Rok 2019

  In this paper, we have introduced a low-profile electronically steerable parasitic array radiator (ESPAR) antenna that can successfully be used to estimate the direction-of-arrival (DoA) of incoming signals in wireless sensor network (WSN) applications, in which the height of the complete antenna has to be low. The proposed antenna is over three times lower than high-profile ESPAR antenna designs currently available in the literature...

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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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Rok 2018

• A GPU Solver for Sparse Generalized Eigenvalue Problems with Symmetric Complex-Valued Matrices Obtained Using Higher-Order FEM

  Publikacja

  • A. Dziekoński
  • M. Mrozowski

  - IEEE Access - Rok 2018

  The paper discusses a fast implementation of the stabilized locally optimal block preconditioned conjugate gradient (sLOBPCG) method, using a hierarchical multilevel preconditioner to solve nonHermitian sparse generalized eigenvalue problems with large symmetric complex-valued matrices obtained using the higher-order finite-element method (FEM), applied to the analysis of a microwave resonator. The resonant frequencies of the low-order...

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• Preconditioners with Low Memory Requirements for Higher-Order Finite-Element Method Applied to Solving Maxwell’s Equations on Multicore CPUs and GPUs

  Publikacja

  • A. Dziekoński
  • G. Fotyga
  • M. Mrozowski

  - IEEE Access - Rok 2018

  This paper discusses two fast implementations of the conjugate gradient iterative method using a hierarchical multilevel preconditioner to solve the complex-valued, sparse systems obtained using the higher order finite-element method applied to the solution of the time-harmonic Maxwell equations. In the first implementation, denoted PCG-V, a classical V-cycle is applied and the system of equations on the lowest level is solved...

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Rok 2017

• 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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