2023 - Publications Repository - Gdańsk University of Technology

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Publications from the year 2023

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Time fractional analysis of Casson fluid with application of novel hybrid fractional derivative operator
- Aziz Ur Rehman
- Muhammad Riaz
- Ilyas Khan
- Abdullah Mohamed
2023 Full text AIMS Mathematics
A new approach is used to investigate the analytical solutions of the mathematical fractional Casson fluid model that is described by the Constant Proportional Caputo fractional operator having non-local and singular kernel near an infinitely vertical plate. The phenomenon has been expressed in terms of partial differential equations, and the governing equations were then transformed in non-dimensional form. For the sake of generalized memory effects, a new mathematical fractional model is formulated based on the newly introduced Constant Proportional Caputo fractional derivative operator. This fractional model has been solved analytically, and exact solutions for dimensionless velocity, concentration and energy equations are calculated in terms of Mittag-Leffler functions by employing the Laplace transformation method. For the physical significance of various system parameters such as α , β , Pr , Gr , Gm , Sc on velocity, temperature and concentration profiles, different graphs are demonstrated by Mathcad software. The Constant Proportional Caputo fractional parameter exhibited a retardation effect on momentum and energy profile, but it is visualized that for small values of Casson fluid parameter, the velocity profile is higher. Furthermore, to validated the acquired solutions, some limiting models such as the ordinary Newtonian model are recovered from the fractionalized model. Moreover, the graphical representations of the analytical solutions illustrated the main results of the present work. Also, from the literature, it is observed that to deriving analytical results from fractional fluid models developed by the various fractional operators is difficult, and this article contributes to answering the open problem of obtaining analytical solutions for the fractionalized fluid models.
Time series analysis and impact assessment of the temperature changes on the vegetation and the water availability: A case study of Bakun-Murum Catchment Region in Malaysia
- Vipin Kumar Oad
- Adam Szymkiewicz
- Nabeel Ali Khan
- Shahzad Ashraf
- Rab Nawaz
- Abdelrazek Elnashar
- Syed Saad
- Abdul Hannan Qureshi
2023 Full text Remote Sensing Applications: Society and Environment
The Bakun-Murum (BM) catchment region of the Rajang River Basin (RRB), Sarawak, Malaysia, has been under severe threat for the last few years due to urbanization, global warming, and climate change. The present study aimed to evaluate the time series analysis and impact assessment of the temperature changes on the vegetation/agricultural lands and the water availability within the BM region. For this purpose, the Landsat data for the past thirty years (1990–2020) were used. Remote sensing techniques for estimating the surface temperatures and variation within the vegetation and water bodies were utilized, and validation was done using on-ground weather stations. Google Earth Engine (GEE) and other RS & GIS tools were used for analyzing the time series trends of land surface temperature (LST), normalized difference vegetation index (NDVI), and normalized difference water index (NDWI). The results exposed an overall rise of 1.06 °C in the annual mean temperatures over the last thirty years. A maximum annual mean NDVI of 0.48 was recorded for 2018 and 2019. The lowest annual mean NDVI (0.27) was observed in 2005. The annual mean NDWI increased to 0.48 in 2018 and 2019, respectively. The statistical correlation results revealed the coefficient of determination (R2) of 0.09 and 0.13 for the annual mean LST and annual mean NDVI and the annual mean LST and annual mean NDWI, respectively. Moreover, the Mann-Kendall trend test for the annual mean temperature series indicates a slightly increasing trend with Sen's slope of 0.03 °C/year. It is found that there is a positive trend in the annual mean rainfall patterns, as Sen's slope indicates a yearly increase of 50.58 mm/year. This study found significant changes in the LST, NDVI, and NDWI of the BM catchment region during the last thirty years, demanding the concerned authorities' instant attention to alleviate the adverse effects of such changes to protect the ecosystem.
TIME-DOMAIN NUMERICAL EVALUATION OF SHIP RESISTANCE AND MOTION IN REGULAR WAVES BY USING THE CFD URANS METHOD
- Mohamad Sadeghi
- Hamid Zeraatgar
- Mohammad Ghaemi
- Mojtaba Barjasteh
2023 Full text
Taking into account the International Maritime Organisation’s (IMO) strategy to radically reduce the GHG emitted by the shipping industry towards zero emission operation, today's assessment of ship behaviour in waves, its seakeeping characteristics and resistance and their interrelation with fuel consumption and emissions are one of the most attended research subject. There are three methods to conduct this analysis, which are Experimental Fluid Dynamics (FED), numerical methods e.g. Computational Fluid Dynamics (CFD) and empirical analysis. This study shows the results of time-domain analysis of ship motions and resistance in head sea waves by using the CFD method, which is then verified using the experimental results. The tests were run for different wavelengths for a KCS model. Numerical results, which are based on solving Unsteady Reynolds Averaged Navier-Stokes equations (URANS) show that the CFD method applied by using STAR CCM+ can be reliable for evaluating the ship seakeeping characteristics and resistance in waves.
Time-Gating method with automatic calibration for accurate measurements of electrically small antenna radiation patterns in Non-Anechoic environments
- Adrian Bekasiewicz
- Sławomir Kozieł
- Michał Czyż
2023 Full text MEASUREMENT
Non-anechoic sites represent a cheap alternative to measurements of antennas in dedicated facilities. However, due to a high noise—from the external EM signal sources and multipath interferences—the quality of radiation patterns obtained in non-anechoic conditions is poor. The characteristics can be corrected using a time-gating method (TGM), which involves filtering of the noise based on temporal analysis of the measured signals. Unfortunately, determination of appropriate TGM setup is prone to failure due to its manual, or semi-manual nature. In this work, an automatic TGM calibration algorithm for accurate measurements in non-anechoic environments has been proposed. The method involves calibration of the test site using the antenna with known accurate responses. The process is implemented as an optimization routine where TGM intervals are adjusted through a curve fitting of the on-site measurements to the reference radiation patterns. The proposed framework has been demonstrated using four compact radiators and validated against the state-of-the-art techniques. Applicability of the method for calibration of the measurements in distinct test sites, as well as the analysis of the aliasing and external noise on the quality of corrected measurements have also been investigated.
TIME-OF-FLIGHT DIFFERENTIAL ELECTRON SCATTERING FROM MOLECULAR TARGETS: BENCHMARK CROSS SECTIONS
- Mateusz Zawadzki
- Murtadha Khakoo
2023
We report time-of-flight differential cross section (DCS) measurements for the electron impact excitation transition in H2. In this work, agreement between available theory and experiment is excellent overall, and marks a transition in electron molecule scattering where differential scattering of excitation is found to be in such precise agreement. We also prove that the newly built apparatus can be used for accurate measurement of the mass stopping power for low energy electrons for H2 for which agreement between theory and experiment is found to be excellent.
TiO2-C nanocomposite synthesized via facile surfactant-assisted method as a part of less energy-consuming LED-based photocatalytic system for environmental applications
- Adam Kubiak
- Anna Grzegórska
- Elżbieta Gabała
- Joanna Zembrzuska
- Mirosław Szybowicz
- Hubert Fuks
- Anna Szymczyk
- Anna Zielińska-Jurek
- Marek Sikorski
- Teofil Jesionowski
2023 Full text JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
A novel facile method was used to incorporate carbon into the titania structure. An alternative synthesis method of carbon-doped TiO2 has been proposed by using a widely used and cheap surfactant. During the process, cetyltrimethylammonium bromide plays a dual role, as a morphology modifier and as a carbon source. The presented approach allows obtained TiO2-C nanostructures to be anatase nanocrystals with carbon being deposited either on the surface or between the TiO2 nanoparticles. The innovative nature of the research subject is related to the design of cheap LED solutions and facile synthesis of TiO2-C for use in novel energy-saving photocatalytic systems. Photocatalytic studies showed promising activity in the oxidation of 4-chlorophenol. Furthermore, it was indicated that LED-based photocatalytic systems allow a significant reduction in energy consumption compared to conventional photocatalytic sets. In addition, the high thermal efficiency of LED systems was confirmed with a thermal imaging camera. Hence, the presented novel LED photocatalytic systems can be an important part of a broad strategy for the protection of the environment.
Topography measurement methods evaluation for entire bending-fatigued fracture surfaces of specimens obtained by explosive welding
- Przemysław Podulka
- Wojciech Macek
- Dariusz Rozumek
- Krzysztof Żak
- Ricardo Branco
2023 Full text MEASUREMENT
In this paper, the methods of compensation of differences in the results of entire bending-fatigued fracture surface topographies were presented. The roughness evaluation was performed with a focus variation microscope and confocal surface topography measurement techniques. The differences in the ISO 25178 roughness parameters were investigated and procedures for their compensation were studied. It was found that various types of optical measurements can cause differences in the errors occurring in the measurement process, such as outliers, and noise. The reduction of differences in the various optical roughness measurements can be attained when measurement errors are compensated. For this study, the applications of general procedures available in commercial software can be suitable for improvements of the roughness measurement results, such as raw data thresholding technique, digital filtering (S-filter), power spectral density, and autocorrelation function analyses. The validation of measurement techniques was proposed for areal and profile studies, including analysis of differences in the calculation areal ISO 25178 roughness parameters.
Topological-numerical analysis of a two-dimensional discrete neuron model
- Paweł Pilarczyk
- Justyna Signerska-Rynkowska
- Grzegorz Graff
2023 Full text CHAOS
We conduct computer-assisted analysis of a two-dimensional model of a neuron introduced by Chialvo in 1995 [Chaos, Solitons Fractals 5, 461–479]. We apply the method of rigorous analysis of global dynamics based on a set-oriented topological approach, introduced by Arai et al. in 2009 [SIAM J. Appl. Dyn. Syst. 8, 757–789] and improved and expanded afterward. Additionally, we introduce a new algorithm to analyze the return times inside a chain recurrent set. Based on this analysis, together with the information on the size of the chain recurrent set, we develop a new method that allows one to determine subsets of parameters for which chaotic dynamics may appear. This approach can be applied to a variety of dynamical systems, and we discuss some of its practical aspects. In the last three decades, various discrete models of a single neuron were introduced, aimed at reflecting the dynamics of neural processes. Unfortunately, analytical methods offer limited insight into the nature of some phenomena encountered by such models. In this paper, we study the classical multi-parameter Chialvo model by means of a novel topological method that uses set-oriented rigorous numerics combined with computational topology. We enrich the existing tools with a new approach that we call finite resolution recurrence. We obtain a comprehensive picture of global dynamics of the model, and we reveal its bifurcation structure. We combine the recurrence analysis with machine learning methods in order to detect parameter ranges that yield chaotic behavior.
Total impact of oxidative stress genes on cardiovascular events—a 7-year follow-up study
- Milena Racis
- Anna Stanisławska-Sachadyn
- Wojciech Sobiczewski
- Marcin Wirtwein
- Michał Krzemiński
- Andrzej Rynkiewicz
- Bartosz Wasąg
- Miłosz Jaguszewski
- Marcin Gruchała
2023 Full text JOURNAL OF APPLIED GENETICS
Cardiovascular (CV) events are the number one cause of lifetime disability and deaths worldwide. It is well known that traditional risk factors do not fully correlate with clinical outcomes; therefore, searching for other markers that would explain CV events occurrence seems essential. Of importance, one of the main factors at the origin of CV events is oxidative stress, causing inflammation and atherosclerotic plaque instability. Therefore the present study was conducted to evaluate eight carefully selected genetic polymorphisms related to oxidative stress as risk modifiers for CV events. A cohort of 1020 patients with coronary atherosclerosis was analysed in a 7-year follow-up observational study. The following endpoints were assessed: CV death, myocardial infarction (MI) and a combined endpoint of CV death/MI/stroke. Our results show that single polymorphisms are not significant cardiovascular disease risk factors, but genetic risk score (GRS), defined as the accumulation of our eight studied polymorphisms, was significantly associated with the three. Specifically, low GRS was associated with a higher risk of CV death, MI and CV death/MI/stroke. In conclusion, when regarding CV events, GRS investigated here can become clinically meaningful and undoubtedly adds to the knowledge in stratifying the risk of CV events.
Toward Safe and Efficient Recovery of Gas Munitions Dumped at Sea
- Lech Rowiński
- Thanh Hai Truong
- Phuoc Quy Phong Nguyen
2023 Full text Polish Maritime Research
The proposal of a system for the safe recovery of unexploded ordnance (UXO), chemical weapons (CW) and chemicalwarfare agents (CWA) dumped at sea mainly after WWI and WWII is described in this work. The proposed solutionaddresses the tasks required to neutralise thousands of tons of dumped material and the currently available solutionsand proposed ideas. Requirements concerning the features of a recovery system are defined and scrutinised, thesebeing intended to ensure the safety of this phase of the UXO/CW neutralisation process. To meet this requirement,the concept of a remotely operated, two-component working size underwater vehicle is proposed, supplemented bya properly sized and outfitted surface platform that is an important part of the recovery system. Finally, the basiccomponents of the proposed system configuration are characterised, together with their functions during the recoveryof dangerous CWA-related objects
Towards a Framework for Context Awareness Based on Textual Process Data
- Aleksandra Revina
- Nina Rizun
- Aksu Ünal
2023
Context awareness is critical for the successful execution of processes. In the abundance of business process management (BPM) research, frameworks exclusively devoted to extracting context from textual process data are scarce. With the deluge of textual data and its increasing value for organizations, it be-comes essential to employ relevant text analytics techniques to increase the awareness of business process (BP) workers, which is important for BP execu-tion. Following the design science research guidelines, the present paper ad-dresses this demand by developing a framework for context awareness based on textual process data using a well-established layered BPM context model. This framework combines and maps various text analytics techniques to the layers of the context model, aiming to increase the context awareness of BP workers and facilitate informed decision-making. The framework is conceptualized in an IT ticket processing case study. The findings show that contextual information ob-tained using our framework enriches the awareness of BP workers regarding the process instance urgency, complexity, and upcoming tasks and assists in making decisions in terms of these aspects
Towards High-Value Datasets Determination for Data-Driven Development: A Systematic Literature Review
- Anastasija Nikiforova
- Nina Rizun
- Magdalena Ciesielska
- Charalampos Harris Alexopoulos
- Andrea Miletić
2023
Open government data (OGD) is seen as a political and socio-economic phenomenon that promises to promote civic engagement and stimulate public sector innovations in various areas of public life. To bring the expected benefits, data must be reused and transformed into value-added products or services. This, in turn, sets another precondition for data that are expected to not only be available and comply with open data principles, but also be of value, i.e., of interest for reuse by the end-user. This refers to the notion of “high-value dataset” (HVD), recognized by the European Data Portal as a key trend in the OGD area in 2022. While there is progress in this direction, e.g., the Open Data Directive, incl. identifying 6 key categories, a list of HVDs and arrangements for their publication and re-use, they can be seen as “core” / “base” datasets aimed at increasing interoperability of public sector data with a high priority, contributing to the development of a more mature OGD initiative. Depending on the specifics of a region and country - geographical location, social, environmental, economic issues, cultural characteristics, (under)developed sectors and market specificities, more datasets can be recognized as of high value for a particular country. However, there is no standardized approach to assist chief data officers in this, and there is a clear lack of conceptualizations for the determination of HVD and systematic oversight. In this paper, we present a systematic review of existing literature on HVD determination, which is expected to form an initial knowledge base for this process, including used approaches and indicators to de-termine them, data, stakeholders
Towards large-scale application of nanoporous materials in membranes for separation of energy-relevant gas mixtures
- Roberto Castro Munoz
- Kumar V. Agrawal
- Zhiping Lai
- Joaquín Coronas
2023 Full text SEPARATION AND PURIFICATION TECHNOLOGY
Membranes containing nanoporous materials (such as zeolites, metal–organic materials and 2D materials such as graphene derivatives) may allow more efficient separation of gas mixtures relevant to emerging energy technologies. For example, such membranes could be applied in the separation of gases containing mixtures of carbon dioxide (CO2) and hydrogen (H2). However, these membranes are currently at a relatively low technology readiness level. Hence, here we review the opportunities and challenges of applying these porous materials in practice and at scale in membranes for possible commercialization. Besides, we highlight the necessity of improvements in the porosity control of 2D materials and the decrease in the selective membrane skin layer when adapted in asymmetric membranes. In this latter point, we declare the main limitations of porous supports, as well as the further developments needed in the gutter layer and supports. Additionally, we review the main membrane module configurations and process requirements, declaring the most suitable configurations (e.g. spiral wound and hollow fiber modules) at scale with promising future for highly intensified membrane modules for application in CO2 and H2 separations. Finally, apart from the conclusions derived from this review, we outline useful recommendations for the researchers in the field.
Towards more inclusive qualitative research: the practice of interviewing neurominorities
- Joanna Szulc
2023 Full text Labour & Industry-A Journal of the Social and Economic Relations of Work
Management scholars increasingly focus their efforts on the development of neurodivergent human capital and the promotion of inclusive employment and decent work. However, it may be argued that existing research still suffers from the lack of a comprehensive appreciation of what neurominorities may find difficult in the research process or how they interpret what the researchers are doing. In the light of only fragmented advice about how qualitative research with neurominorities should be conducted, this short research note aims to promote effective and inclusive qualitative research that ensures that the specific needs of neurominorities are taken into account throughout the entire research pathway. Building on the existing literature and my own reflections, I call on qualitative management scholars to engage in research that is truly impactful at multiple levels by re-considering how they make impact on those who traditionally have less voice or power.
Towards Robust Identification of Nonstationary Systems
- Artur Gańcza
- Marta Chełkowska
- Natalia Kleinschmidt
2023 Full text
The article proposes a fast, two-stage method for the identification of nonstationary systems. The method uses iterative reweighting to robustify the identification process against the outliers in the measurement noise and against the numerical errors that may occur at the first stage of identification. We also propose an adaptive algorithm to optimize the values of the hyperparameters that are crucial for this new method.
TQM jako podstawa przemian projakościowych w szkolnictwie wyższym
- Piotr Grudowski
2023 Full text Problemy Jakości
Cel: Przedstawienie najważniejszych wniosków płynących z badań prowadzonych w różnych regionach świata oraz obserwacji własnych prezentujących wpływ koncepcji TQM na efekty zarządzania w instytucjach szkolnictwa wyższego. Projekt badania/metodyka badawcza/koncepcja: Wykorzystano studium literatury wg zaleceń metodycznych J. Creswella. Wnioski płynące z rozważań oparto, przede wszystkim, na podejściu indukcyjnym. Wyniki/wnioski: Przedstawiono czynniki wspierające wprowadzanie TQM w szkołach wyższych. Wskazano także typowe problemy spotykane w związku z wprowadzaniem TQM oraz koncepcji pokrewnych w uczelniach. Określono warunki skutecznej integracji inicjatyw projakościowych w uczelniach z koncepcją Jakości 4.0 i Społeczeństwa 5.0. Ograniczenia: Wybrano jedynie najważniejsze – zdaniem autora – czynniki wspierające i problemy dotyczące aplikacji TQM w szkołach wyższych. Wnioski ograniczają się do wyników badań dostępnych w ramach studium literatury światowej i doświadczeń własnych autora. Zastosowanie praktyczne: Wskazane wnioski z badań oraz praktycznych doświadczeń mogą być uwzględnione przez personel uczelni odpowiedzialny za doskonalenie procesów w ramach konkretnych projektów. Oryginalność/wartość poznawcza: Artykuł pełni rolę porządkującą, jeśli chodzi o teorię i praktykę dotyczące roli koncepcji TQM w doskonaleniu systemów zarządzania szkół wyższych, wskazując czynniki, które powinny być przedmiotem dociekań w tym zakresie.
Trade of the European Union with the Post-Soviet Republics of Central Asia in the Second Decade of the 21st Century
- Krystyna Gomółka
2023 Studia Wschodnioeuropejskie
.The article presents the European Union's trade with five Central Asian countries: Kazakhstan, Turkmenistan, Tajikistan, Kigistan and Uzbekistan in the two decades of the 21st century.
TRAINING ON SUSTAINABLE DAYLIGHTING: THE NLITED PROJECT
- Natalia Sokół
- Federica Giuliani
- M. Sarey Khanie
- Valerio Roberto Maria Lo Verso
- Niko Gentile,
2023
NLITED - New Level of Integrated Techniques for Daylighting Education is a European project bridging a daylight design education gap. The paper describes the framework of the project, which consists of a free online e-platform with 32 modules dedicated to daylight knowledge within the built environment used by almost 800 learners (students and professionals). Two 7-day summer schools support the e-platform. The e-content was created by more than 30 international tutors based on a series of workshops and online surveys to define the need for sustainable daylight training. The paper addresses a gap in the literature on daylight education by describing the functioning e-platform and its usage results.
Transformation of bimetallic Ag–Cu thin films into plasmonically active composite nanostructures
- Marcin Łapiński
- Robert Kozioł
- Wojciech Skubida
- Piotr Winiarz
- Rowa Mahjoub Yahia Elhassan
- Wojciech Sadowski
- Barbara Kościelska
2023 Full text Scientific Reports
Formation of plasmonically active silver, copper and composite silver-copper nanostructures were studied in this paper. Metallic nanostructures were fabricated by thermal disintegration, so called dewetting, of the thin films in an argon atmosphere. The formation process of the nanostructures was in-situ observed by a novel method, based on resistance measurements. The influence of the material and thickness of the initial thin film on temperature of their disintegration was investigated. Electrical measurements were validated by scanning electron microscopy observations, while metallic the behavior of nanostructures was studied by XPS method. The formation of silver-copper nanocomposite structures was confirmed by UV–vis spectroscopy. Plasmon resonance with two characteristic peaks for nanocomposite structures was observed.
Transformator z tyrystorowym przełącznikiem zaczepów jako obiekt sterowania
- Piotr Sępka
- Maciej Brzycki
- Artur Cichowski
2023 Full text Przegląd Elektrotechniczny
Artykuł jest wynikiem realizacji studenckiego projektu, którego obiektem badań były transformatory z tyrystorowym podobciążeniowym przełącznikiem zaczepów (PPZ), znajdujące się w Laboratorium LINTE^2. Projekt obejmował analizę stanów przejściowych zachodzących podczas przełączania tyrystorów. W referacie przedstawiono opracowany model tyrystorowego przełącznika zaczepów wraz z wynikami badań symulacyjnych.