2024 - Publications Repository - Gdańsk University of Technology

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Publications from the year 2024

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Fractional Spectral and Fractional Finite Element Methods: A Comprehensive Review and Future Prospects
- Muhammad Bilal Hafeez
- Marek Krawczuk
2024 ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
In this article, we will discuss the applications of the Spectral element method (SEM) and Finite element Method (FEM) for fractional calculusThe so-called fractional Spectral element method (f-SEM) and fractional Finite element method (f-FEM) are crucial in various branches of science and play a significant role. In this review, we discuss the advantages and adaptability of FEM and SEM, which provide the simulations of fractional derivatives and integrals and are, therefore, appropriate for a broad range of applications in engineering, biology, and physics. We emphasize that they can be used to simulate a wide range of real-world phenomena because they can handle fractional differential equations that are both linear and nonlinear. Although many researchers have already discussed applications of FEM in a variety of fractional differential equations (FDEs) and delivered very significant results, in this review article, we aspire to enclose fundamental to advanced articles in this field which will guide the researchers through recent achievements and advancements for the further studies.
Fracture prediction in flat PMMA notched specimens under tension - effectiveness of the equivalent material concept and fictitious material concept
- Elżbieta Bura
- A.r. Torabi
- Andrzej Seweryn
2024 Full text THEORETICAL AND APPLIED FRACTURE MECHANICS
The fracture of notched elements under mode I loading (tension) remains an inexhaustible research topic, especially when it comes to the fracture of thermoplastic materials such as polymethylmethacrylate (PMMA), which experience considerable plastic strains under tension. The paper points out that traditional brittle fracture criteria such as mean stress (MS) or maximum tangential stress (MTS) criteria used to predict this phenomenon do not accurately indicate the value of the critical load. They work much better when combined with the equivalent material concept (EMC) and fictitious material concept (FMC). The effectiveness of both concepts depends on the size of the notch root radius, and thus on the yield zone size.
Fracture surface topography measurements analysis of low-alloyed corrosion resistant steel after bending-torsion fatigue tests
- Przemysław Podulka
- Wojciech Macek
- Beata Zima
- Mateusz Kopec
- Ricardo Branco
- Henryk Achtelik
2024 PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISIONENGINEERING AND NANOTECHNOLOGY
In this paper, an assessment of a topography measurement method for fracture surfaces of 10HNAP steel after bending-torsion fatigue tests was performed. Surface roughness was measured by using a non-contact Focus Variation Microscopy (FVM) technique in which the non-measured points (NMPs) and outliers (spikes) were removed by the application of general methods. The results revealed, that the optical measurement method introduced variations in the high-frequency errors, considered as noise within the selected bandwidth. Therefore, the minimization of the high-frequency noise (HFN) was proposed based on an extensive examination of ISO 25178 roughness parameters. Additionally, a general S-filter was applied, as recommended by international standards and commercial software. It was used to identify and remove noise from the measured data after pre-processing. Consequently, levelling and eliminating of NMPs and spikes was successfully performed. Subsequently, the results obtained by using various filters were compared to further assess the impact of different filtration bandwidths. Finally, the proposed procedure was validated by implementing different general functions, such as autocorrelation (ACF), power spectral densities (PSD), and texture direction (TD). It was concluded, that coupled characteristics, including profile and areal measurements, should be studied simultaneously since they are necessary to analyze the fracture surfaces comprehensively.
Fracture susceptibility of high RAP content asphalt concrete in terms of aging
- Cezary Szydłowski
2024
Due to the reduction of CO2 emissions during the production of asphalt mixtures and the decrease in the demand for mineral resources, the addition of reclaimed asphalt pavement (RAP) is becoming indispensable. The durability of asphalt pavements containing a high RAP content may be reduced due to a decrease in the cracking resistance of the material, especially under the influence of operational aging. The article presents the results of tests and analysis of fracture susceptibility of asphalt concretes with the addition of RAP (binder replacement ratio BR = 0.2 and 0.4), considering long-term aging. Asphalt mixtures were evaluated based on the semi-circular bending (SCB) test at intermediate temperature. It can be concluded that the addition of RAP with BR = 0.2 causes a decrease in fracture resistance comparable to that of the mixture without RAP but after long-term aging. The addition of RAP reduces the Flexibility Index (FI) by approximately 40% for short-term aging and 30% for long-term aging.
Framework for extracting rails and setting-out railway line axis based on UAV photogrammetric measurements
- Paweł Burdziakowski
- Cezary Specht
- Andrzej Stateczny
- Mariusz Specht
- Pawel S. Dabrowski
- Oktawia Lewicka
2024 Full text International Journal of Rail Transportation
Technical diagnostics enables assessing the current technical condition of a railway line and adjacent infrastructure, and forecasting its changes over a specific time horizon. One of its elements is the periodic monitoring of rail position and their geometry. This article presents a new framework for the setting-out of a railway track axis. The process presented in the manuscript is based on the specific filtration and extraction of rails from a point cloud originating from the photogrammetric process. Data was acquired using a small unmanned aerial vehicle (UAV). A railway track axis setting-out using the process described herein was related to dynamic satellite track measurement. An average accuracy achieved in the horizontal plane is 1.6 cm which corresponds to the accuracy of the source photogrammetric product. The achieved accuracy enables using this method to be suitable for technical track monitoring, geoinformation, and cartographic work.
Framework interfejsu radiowego NB-IoT
- Olga Błaszkiewicz
- Jarosław Magiera
- Alicja Olejniczak
- Piotr Rajchowski
- Jarosław Sadowski
- Jacek Stefański
- Krzysztof Cwalina
2024 Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne
W niniejszym artykule opisano rezultaty uzyskane w ramach zrealizowanego projektu definiowanego programowo frameworka wąskopasmowego interfejsu radiowego dla urządzeń Internetu Rzeczy. Przedstawiono elementy składowe konfigurowalnego interfejsu radiowego oraz jego charakterystykę eksploatacyjną.
Frequency-Reconfigurable Hybrid SIW-Based Self-Diplexing Antenna Using Solid and Liquid Dielectric Loading
- Mettu Goutham Reddy
- Karthikeyan Subramanian
- Nrusingha Pradhan
- Sławomir Kozieł
2024 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
This paper presents a novel frequencyreconfigurable self-diplexing antenna (SDA) utilizing a hybrid substrate-integrated waveguide (SIW). The antenna comprises a radiating slot, a feeding network, and a hybrid SIW cavity featuring half-mode circular and half-mode rectangular SIW structures. The unique feature of this antenna lies in its fine-tuning capability of each resonant frequency by inserting or injecting solid and liquid dielectrics into designated etched pockets. Experimental results demonstrate that the proposed structure can be effectively tuned within the frequency range of 2.7 to 3.47 GHz for the lower band and 4.05 to 4.96 GHz for the upper band. The mutual coupling between the ports is better than 20.4 dB, and the antenna maintains consistent radiation patterns across the entire operating range. The proposed tunable antenna, featuring precise frequency tuning capability, compact size, and stable radiation patterns, is well suited for various applications, including wireless communication systems, biomedical telemetry, microwave imaging, WiMAX, and Wi-Fi.
Frequency-Variant Double-Zero Single-Pole Reactive Coupling Networks for Coupled-Resonator Microwave Bandpass Filters
- Muhammad Yameen Sandhu
- Maciej Jasiński
- Adam Lamęcki
- Roberto Gómez-García
- Michał Mrozowski
2024 IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
In this work, a family of frequency-variant reactive coupling (FVRC) networks is introduced and discussed as new building blocks for the synthesis of coupled-resonator bandpass filters with real or complex transmission zeros (TZs). The FVRC is a type of nonideal frequency-dependent inverter that has nonzero elements on the diagonal of the impedance matrix, along with a nonlinear frequency-variation profile of its transimpedance parameter. The distinctive feature of these new FVRCs is that they can be modeled with a simple bridged-T network consisting of four reactive elements. Such FVRCs can introduce one pole and up to two TZs—so that they are referred to as double-zero single-pole (DZSP) networks. DZSP networks allow the pole to be located above, below, or inbetween the TZs. Depending on the choice of the elements in the bridged-T circuit, the position of the TZs and the pole can be controlled independently. The coupling matrix for filters with DZSP networks can be found by solving an inverse-structured nonlinear eigenvalue problem (ISNEVP). Examples of possible implementations of DZSP coupling networks are provided for both lumped and quasi-lumped-element circuits, as well as for transmission-line-based and waveguide technologies. The application of DZSP coupling networks to the design of microwave bandpass filters with generalized Chebyshev-type characteristics is illustrated by means of the synthesis of three microstrips and two waveguide coupled-resonator bandpass filters. The waveguide filters are verified through electromagnetic (EM) simulations and the microstrip filters are manufactured and characterized for proof-of-concept demonstration purposes, showing a fairly close agreement between EM simulations and measurements.
From ashes to porous hierarchical nanocarbon electrode: Upcycling secondary waste materials through self-catalytic chemical vapour deposition
- Maciej Głowacki
- Katarzyna Karpienko
- Maciej Wróbel
- Karol Szczodrowski
- Chiara Giosuè
- Gianni Barucca
- Maria Letizia Ruello
- Robert Bogdanowicz
- Mattia Pierpaoli
2024 Full text Sustainable Materials and Technologies
Metal and metal oxide particles are abundant in various ash-based wastes. Utilizing these as catalyst sources for the fabrication of carbon nanomaterials could present a valuable approach to reduce our reliance on non-renewable and costly catalyst sources, thereby facilitating large-scale nanomaterial production. In this context, secondary waste materials (SWMs) are by-products resulting from the (complete or partial) combustion of carbon-rich sources or other industrial processes, the disposal of which poses a serious environmental problem. In this study, we demonstrate a novel strategy to upcycle SWMs as catalysts, as received, for the growth of carbon nanoarchitectured electrodes through microwave plasma-enhanced chemical vapour deposition (MPECVD), without the need for functionalization. Firstly, 10 SWMs were selected to fabricate porous hierarchical nanocarbon (PHN) electrodes by phase-inversion and subsequent catalytic MPECVD growth. Secondly, distinct growth conditions, both in the presence and absence of CH4 as an external carbon source were applied, resulting in conductive electrodes, on which acetaminophen oxidation was performed. Results show that not all SWMs, despite originating from similar processes, work as a catalyst. In particular, principal component analysis suggests the presence of calcium oxosilicate and calcium‑magnesium‑iron carbonate as potential catalysts, which are present in two SWMs. Contrary to what expected, the occurrence of metals, such as Fe, Ni, is not a sufficient factor for the catalytic growth of carbon nanostructure. Interestingly, water vapour adsorption isotherms suggest the formation of different porous networks according to the specific SWMs. Finally, the development of waste-derived catalysts fosters the concept of upcycling, converting waste into higher-value products, thus closing the loop on resource utilization and minimizing waste generation.
From creative writing, virtual environments to nature-based solutions: linking research and education to facilitate transition from sustainable to regenerative cities
- Lucyna Nyka
- Anahita Azadgar
- Katarina Larsen
- Pedro Ressano Garcia
2024 Full text Global Journal of Engineering Education
Challenges related to the climate crisis and its consequences, such as rising sea levels, urban heat islands or floods, engender pressure on architectural education. Sustainable design often inclines to regenerative one - an emerging trend focused on the restorative power of architecture. The question appears upon the tools and methods that would facilitate both students and academics to address new challenges. This article offers insights into one of such methods based on the integration of students into research programmes. The European Union’s Horizon 2020 research project SOS Climate Waterfront and follow-up interdisciplinary courses and events offered to students at Gdańsk University of Technology, Poland; KTH Royal Institute of Technology, Stockholm, Sweden; and Laval University, Quebec City, Quebec, Canada, are presented to illustrate this process. Starting with research by design approaches, and continuing with follow-up initiatives, groups of students gradually extend their areas of experimentation empowering urban designs with nature-based solutions (NBS), building their critical reflection through an immersion in the science-art-engineering nexus, virtual experience of nature or through creative writing about climate futures. Published, exhibited and awarded students’ works confirm numerous benefits and efficacy of the proposed research-based architectural education.
From flow to jamming: Lattice Gas Automaton simulations in granular materials
- Mohamed Gaber
- Raquel H. Ribeiro
- Jan Kozicki
2024 POWDER TECHNOLOGY
We introduce the first extension of a Lattice Gas Automaton (LGA) model to accurately replicate observed emergent phenomena in granular materials with a special focus on previously unexplored jamming transitions by incorporating gravitational effects, energy dissipation in particle collisions, and wall friction. We successfully reproduce flow rate evolution, density wave formation, and jamming transition observed in experiments. We also explore the critical density at which jamming becomes probable. This research advances our understanding of granular dynamics and offers insights into the jamming behavior of granular materials.
From phosphanylphosphaalkenes to coordination copper and silver polymers containing P–P bonds
- Aleksandra Ziółkowska
- Marta Prześniak-Welenc
- Tomasz Kruczyński
- Michael Gamer
- Łukasz Ponikiewski
2024 DALTON TRANSACTIONS
This study was focused on the activation of the C[double bond, length as m-dash]P bond via reactions of Ph2C[double bond, length as m-dash]P-PtBu2 (1) with 1,6-hexanediol and selected dithiols (1,4-butanedithiol, 1,4-benzenedithiol and 1,4-benzenedimethanethiol). These reactions proceed according to a 1,2-addition mechanism, providing new compounds with formulas {(Ph)2(H)C-P-PtBu2}{μ2-(O-(CH2)6-O)}{tBu2P-P-C(H)(Ph)2} (2), {(Ph)2(H)C-P-PtBu2}{μ2-(S-(CH2)4-S)}{tBu2P-P-C(H)(Ph)2} (3a), {(Ph)2(H)C-P-PtBu2}{μ2-(S-C6H4-S)}{tBu2P-P-C(H)(Ph)2} (3b), and {(Ph)2(H)C-P-PtBu2}{μ2-(S-CH2-C6H4-CH2-S)}{tBu2P-P-C(H)(Ph)2} (3c). Next, the reactions of 3a and 3c with metal chlorides led to the growth of desired coordination polymers of copper(I) and silver(I). All the obtained compounds remained stable under atmospheric conditions.
FRP-based reinforcement coatings of steel with application prospects in ships and offshore structures: a review
- Abu Al Hassan
- Krzysztof Wołoszyk
- Przemysław Krata
2024 Ships and Offshore Structures
Latest research on novel FRP-based anti-corrosion structural coatings (for enhancing structural capacity and strengthening the coating layer) is discussed with application prospects for ships and offshore structures. In the marine environment, structures constantly face corrosion and fatigue cracks. Combining this with high operational and wave loads, it might cause a structural collapse. Recently, polymer composites have been studied for possible reinforcement, especially for steel structures in civil engineering. It is important to assess their effectiveness and review of research on the fatigue, tensile, buckling, and debonding properties of fibre-based structural coatings is given and summarised. Most research focused on carbon fibre reinforced composites. Resins matrices other than epoxy, behaviour on corroded steel, ply orientation, and pre-stress level are still untapped adequately. Similarly, another types of fibres than carbon and their hybrids are still insufficiently examined. Although such research direction is promising, the need for future research is highlighted and given in detail.
Fuel price, income and road safety as determinants of the level of the population’s economic well-being in Poland
- Oleksandr Melnychenko
- Tetiana Osadcha
- Tetyana Kalna-Dubinyuk
2024 AIP Conference Proceedings
The opportunity to travel is one of the most favorite human activities, given that on a trip a person gets new knowledge, impressions and positive emotions. Recreational trips occupy a prominent place in the concept of the economics of happiness, and the study of factors that influence decision-making regarding travel is important for forecasting the number of tourists, infrastructure development, income and expenses of businesses and authorities. Using the panel data representative of Poland, the authors concluded that the price of fuel and the level of actual income are not key factors for travelers. At the same time, the proposed model gives an error of forecasting the number of tourists less than 1% on average for the entire period of research of monthly data from January 2014 to May 2022 on the cost of fuel at gas stations, the level of population’s income, the level of inflation and the level of drivers’ decency on the road. The obtained data can be used to calculate estimates of the flow of tourists, the level of welfare and happiness of the society.
Future opportunities for products derived from black soldier fly (BSF) treatment as animal feed and fertilizer - A systematic review
- Shahida Anusha Siddiqui
- Ankush Subhash Gadge
- Muzaffar Hasan
- Teguh Rahayu
- Sergey Nikolaevich Povetkin
- Ito Fernando
- Roberto Castro Munoz
2024 Full text ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
The pursuit of novel food products with good nutritional value for both direct and indirect human consumption is crucial. Given the nutritional benefits of insects and the sustainability of this sort of farming, using them as food for farmed animals is a promising alternative. In this regard, the black soldier fly (Hermetia illucens) is most capable of efficiently converting a wide variety of organic materials, from food waste to manure, into insect biomass generating value and closing nutrient loops as they reduce pollution and costs. Their larvae have 29% fat and 42% crude protein, yet they have more saturated fats than most insects. They don't concentrate hazards such as mycotoxins or insecticides. Although rapid development is expected, insects remain underutilized in the animal feed industry mainly due to technical, financial, and regulatory barriers. The social stigmas and legal prohibitions against eating organisms that eat waste are added to extant taboos facing insect consumption. Bridging the knowledge gap is crucial to bring together stakeholders and to better understand the opportunities and challenges of this novel industry, so as to develop guidelines on producing insects on an industrial scale to facilitate the wider use of BSF products as animal feed, and fertilizer.
Game theory-based virtual machine migration for energy sustainability in cloud data centers
- Francisco Javier Maldonado-Carrascosa
- Sebastián García-Galán
- Manuel Valverde-Ibáñez
- Tomasz Marciniak
- Małgorzata Szczerska
- Nicolás Ruiz-Reyes
2024 Full text APPLIED ENERGY
As the demand for cloud computing services increases, optimizing resource allocation and energy consumption has become a key factor in achieving sustainability in cloud environments. This paper presents a novel approach to address these challenges through an optimized virtual machine (VM) migration strategy that employs a game-theoretic approach based on particle swarm optimization (PSO) (PSO-GTA). The proposed approach leverages the collaborative and competitive dynamics of Game Theory to minimize energy consumption while using renewable energy. In this context, the game is represented by the swarm, where each player, embodied by particles, carries both competitive and cooperative elements essential to shape the collective behavior of the swarm. PSO is integrated to refine migration decisions, improving global convergence and optimizing the allocation of VMs to hosts. Through extensive simulations and performance evaluations, the proposed approach demonstrates significant improvements in resource utilization and energy efficiency, promoting sustainability in cloud computing environments. This research contributes to the development of environmentally friendly cloud computing systems, thus ensuring the delivery of energy-efficient cloud computing. The results demonstrate that the proposed approach outperforms fuzzy and genetic methods in terms of renewable energy usage. The PSO-GTA algorithm consistently outperforms Q-Learning, Pittsburgh and KASIA across three simulation scenarios with varying cloudlet dynamics, showcasing its efficiency and adaptability, and yielding improvements ranging from 0.68% to 5.32% over baseline results in nine simulations.
"Gdańskie panoramy z różnych perspektyw’ w ramach cyklu ‘Dojrzały smak przygody’, edycja XX dla Centrum Informacji i Edukacji Ekologicznej, wycieczka edukacyjna
- Agnieszka Kurkowska
2024
Wycieczka prowadziła trasą: Gdańsk Żółty Wiadukt, Grodzisko, Biskupia Górka, Bastion Żubr, Kamienna Śluza, Długi Targ - IKM. Celem była prezentacja widoków panoramicznych z wyjaśnieniem historii ukształtowania i ufortyfikowania miasta. Wskazano współczesne modyfikacje i zwrócono uwagę na zagrożenia w niedbałym planowaniu krajobrazu miasta.
Gender as a Moderator of the Double Bias of Mistakes – Knowledge Culture and Knowledge Sharing Effects
- Wioleta Kucharska
- Aleksandra Kopytko
2024 Full text
There is no learning without mistakes. The essence of the double bias of mistakes is the contradiction between an often-declared positive attitude towards learning from mistakes, and negative experiences when mistakes occur. Financial and personal consequences, shame, and blame force desperate employees to hide their mistakes. These adverse outcomes are doubled in organizations by the common belief that managers never make mistakes, which makes the contradiction even more harmful. Double bias affected leaders select only easy tasks to secure their positions, and those who want to be promoted hide their mistakes to maintain the image of a “perfect employee.” Avoiding the risk of failure is generally not wrong as long as doing so does not block organizational growth. It has been proven that the double bias of mistakes can present a severe hurdle for organizational learning and collective intelligence building. This study explores whether the double bias of mistakes is gender-related and how it affects tacit and explicit knowledge sharing. To do so, it is based on a sample of 183 Polish knowledge workers affected by the double bias of mistakes. The analysis method was ordinary least squares regression, which was conducted with SPSS PROCESS software. Results show that the double bias of mistakes generally causes more problems for female specialists than male specialists and more for male managers than female managers. Regarding managers, male managers probably tend to focus more on control at work. In contrast, women focus on supporting learning (they accept mistakes as a source of knowledge and share knowledge gained from them). Considering current challenges relating to collective intelligence building, women seem to have the potential to be better mentors and, probably, better leaders than men. Such formulated conclusions are based on indirect inferences, so further research is necessary.
GENDER INEQUALITY IN THE LABOUR MARKET IN KAZAKHSTAN AND UZBEKISTAN
- Krystyna Gomółka
2024
The aim of the following article is to present gender inequality in the labour market in Kazakhstan and Uzbekistan. Gender inequality was researched by analyzing documents providing rights for women and men in Kazakhstan and Uzbekistan. The author presented the unequal treatment of women in the labour market by examining the causes of the level of employment of women and men - contract workers, higher unemployment among women, and finally by the lower remuneration offered to women workers in both countries. The research was conducted on the basis of the analysis of statistical data available on the websites of the Kazakh and Uzbek statistical offices.
Geometric working volume of a satellite positive displacement machine
- Paweł Śliwiński
2024 Full text Scientific Reports
This article describes a method for determining the geometric working volume of satellite positive displacement machines (pump and motor). The working mechanism of these machines is satellite mechanism consisting of two non-circular gears (rotor and curvature) and circular gears (satellites). Two variants of the satellite mechanism are presented. In the first mechanism, the rolling line of the rotor is a sinusoid "wrapped" around a circle. In the second mechanism, the rolling line of the rotor is a double sinusoid "wrapped" around a circle. A method for calculating the area of the working chamber as a function of the rotor rotation angle is presented, based on mathematical formulae of the rotor, the curvature and the satellite rolling lines. It has been shown that the second variant of the satellite mechanism is advantageously characterised by a larger difference between the maximum area of the working chamber and the minimum area of this chamber. New mathematical formulas have been proposed to calculate the area of the working chamber for any angle of rotation of the shaft (rotor) based on the maximum and minimum values of the area of this chamber. It was thus confirmed that the geometric working volume depends on the maximum and minimum area of a working chamber and on the height of the satellite mechanism. The analyses of the area of the working chamber were carried out both for the mechanism without gears (the area delimited by the rolling lines of the elements of the mechanism) and for the real mechanism with gears. Differences in the values of these fields were also detected.