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Gdańsk University of Technology

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Publications from the year 2023

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  • Role of research and development in internationalization of high-tech firms: Empirical results from Poland
    • Krzysztof Wach
    • Nelly Daszkiewicz
    2023 Full text Journal of International Studies

    The article focuses on the significance of research and development (R&D) in driving the internationalization of Polish high-tech firms. R&D is essential for businesses to remain competitive and adapt their products to the specific requirements of different markets. The study aims to investigate the relationship between R&D and the internationalization process of high-tech firms based in Poland, with a focus on the innovation context. We used a quantitative research method and employed a survey questionnaire to evaluate the internationalization of high-tech firms in Poland. The study employed a computer-assisted telephone interviewing (CATI) method and identified the random sample of 263 fully-filled questionnaires during the survey that were important for further statistical analysis. We confirmed that research and development as it is commonly understood, i.e., having one's own R&D department and making expenditures on R&D, helps and strengthens the internationalization of high-tech firms.

  • Rotor-Flux Vector based Observer of Interior Permanent Synchronous Machine
    • Marcin Morawiec
    • Arkadiusz Lewicki
    • Charles Ikechukwu Odeh
    2023 Full text IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS

    The sensorless control system of the interior permanent magnet machine is considered in this paper. The control system is based on classical linear controllers. In the machine, there occurs non-sinusoidal distribution of rotor flux together with the slot harmonics, which are treated as the control system disturbances. In this case, the classical observer structure in the (d-q) is unstable for the low range of rotor speed resulting in disturbances. This negative effect can be minimized by using the observer structure which is based on the rotor flux vector in (α-β) stationary frame together with the classical rotor speed and position law of estimation. The performance of the observer structure is validated by simulation and experimental results in the sensorless control system with field-oriented control

  • Roughness evaluation of turned composite surfaces by analysis of the shape of Autocorrelation Function
    • Przemysław Podulka
    • Wojciech Macek
    • Beata Zima
    • Grzegorz Lesiuk
    • Ricardo Branco
    • Grzegorz Królczyk
    2023 Full text MEASUREMENT

    In this paper, the application of an Autocorrelation Function for the characterisation of surface topography was validated. The roughness evaluation of turned composite surfaces was supported by sophisticated studies of the Autocorrelation Function properties, considering especially the shape of the function. Details were measured with the optical method. The selection of the surface roughness evaluation procedures was carried out based on the Autocorrelation Function for both profile and areal analyses. Moreover, the application of various types of regular analysis methods, proposed in commercial software, like regular Gaussian regression and robust Gaussian functions, median de-noising, regular isotropic Spline, and fast Fourier transform filters, was proposed for the evaluation of surface topography parameters from the ISO 25178 standards. It was found that many common techniques, like commonly used filters, spectral analysis, and characterisation of texture direction, were supported by the proposed Autocorrelation Function studies. Moreover, the hard thresholding technique was found to be valuable in the comprehensive noise-suppression analysis.

  • Routing Method for Interplanetary Satellite Communication in IoT Networks Based on IPv6
    • Paweł Dobrowolski
    • Grzegorz Debita
    • Przemysław Falkowski-Gilski
    2023

    The matter of interplanetary network (IPN) connection is a complex and sophisticated topic. Space missions are aimed inter alia at studying the outer planets of our solar system. Data transmission itself, as well as receiving data from satellites located on the borders of the solar system, was only possible thanks to the use of powerful deep space network (DSN) receivers, located in various places on the surface of the Earth. In this paper, we describe a routing method, based on geostationary orbits of the planets of our solar system, to give predictable, orderly motion of the satellites, equipped with measurement tools, i.e., managed by repro-grammable field-programmable gate arrays (FPGAs), related with the Internet of things (IoT) concept.

  • Równoległy filtr aktywny sterowany ze sprzężeniem od prądu zasilającego - badania laboratoryjne
    • Agata Bielecka
    • Daniel Wojciechowski
    2023 Full text Przegląd Elektrotechniczny

    W artykule przedstawiono wyniki badń laboratoryjnych dla układu filtru aktywnego sterowanego predykcyjnie ze sprzężeniem od prądu zasilającego. Jakość kompensacji harmonicznych prądu realizowana przez badany układ została porównana z poziomem kompensacji tych prądów osiąganym w układzie otwartym oraz układem łączącym w sobie zalety obydwu układów w jednym algorytmie. Badania laboratoryjne przeprowadzono dla pracy filtru z mocą mniejszą niż znamionowa, a także dla przypadku braku kompensacji czasów martwych w układzie.

  • Rubber wastes recycling for developing advanced polymer composites: A warm handshake with sustainability
    • Paulina Wiśniewska
    • Natalia Wójcik
    • Jacek Ryl
    • Robert Bogdanowicz
    • Henri Vahabi
    • Krzysztof Formela
    • Mohammad Saeb
    2023 JOURNAL OF CLEANER PRODUCTION

    Recycling and management of rubber wastes experiences an early-stage maturity in the quest for sustainable and circular materials. Up to now, solutions proposed for sustainable development of rubber wastes are limited, so that properties and performance features of recycled products are inadequate for practical applications. Herein, an experimental protocol is introduced for manufacturing semi-sustainable polymer composites based on ground tire rubber (GTR) and ethylene-vinyl acetate copolymer (EVA), varying carbon black (CB) content (5–50 phr), CB type, i.e., low-surface area CB (L-CB) and high-surface area CB (H-CB), and EVA/GTR composition (50/50 and 75/25 w/w). Processing (printability potential and fluidity/flexibility), properties (thermal, and mechanical), and performance (fire safety and electrical conductivity) features of the resulting composites are analyzed and interpreted. Highly-loaded 50/50 GTR/EVA systems reveal promising properties and performance. The flexibility of product is promising for additive manufacturing. Tensile strength is independent from CB type and blend composition, while elongation at break change pursuing a percolation threshold for CB ≤ 10 phr and CB > 10 phr depending on CB type. Thermal stability is considerable for 50/50/50 (w/w)/phr GTR/EVA/CB system with high amount of GTR. A long-standing flame retardancy is observed for 50/50/50 GTR/EVA/L-CB and 50/50/25 GTR/EVA/H-CB (w/w)/phr composites. A frequency-independent direct current (DC) branch is appeared by increasing temperature at low-frequency region, characteristic of rubber-like dielectric materials. The DC part is intensified even at low temperatures (<10 °C) when CB content increased, so that percolation thresholds are 5 phr and 10 phr for H-CB and L-CB loaded blends, respectively. This work opens new gates of hope towards development of fully sustainable polymer composites from recycled rubber wastes.

  • Rural Building in Opole Silesia During the Period of the Frederician Colonization
    • Dariusz Bajno
    • Marcin Fiutak
    • Maciej Niedostatkiewicz
    2023

    The aim of the article is to present the rural construction in the Opole countryside (Poland) during the “Frederician colonization”. Showing socio-economic areas of Opole villages, differing from each other, the differences of which resulted from the environmental conditions influencing the processes of enfranchisement and industrialization. These processes at the turn of the 17th and 19th centuries influenced the image of the Opole and Upper Silesian villages as well as the development of skeleton and brick construction. By gradually analyzing individual regions of Opole Silesia, one can notice large-scale changes in rural construction, differences in the population density and multiculturalism of the inhabitants of the Opole region, showing the complex settlement process, the effects of which can be seen in the Opole countryside to the present day. The article will discuss the process of “Frederician colonization” and its impact on the change of architecture in the region, as well as the accompanying construction and conservation techniques. A look at regional construction from the turn of the 17th and 19th centuries brings closer the cultural heritage of the region's architecture, allows you to deepen your knowledge of architectural forms and techniques of erecting objects of a bygone era, thus enabling the protection of the historical substance of rural regions of Opole Silesia. The article will also discuss the degree of preservation of the historic substance described above along with the forecast of their durability in the further period of operation.

  • Ryzyko strat odgromowych a systemy fotowoltaiczne
    • Leszek Litzbarski
    • Marek Olesz
    • Konrad Seklecki
    • Mikołaj Nowak
    2023 Full text Przegląd Elektrotechniczny

    Artykuł opisuje wybrane zagrożenia związane z eksploatacją instalacji fotowoltaicznych oraz sposoby zmniejszania związanego z tym ryzyka. Opisano wpływ instalacji fotowoltaicznej na wzrost ryzyka strat odgromowych określony na podstawie obliczeń wykonanych za pomocą programu DEHN Risk Tool. Wykonano symulacje dla trzech przypadków: elektrownie fotowoltaiczne o różnej mocy, budynek jednorodzinny usytuowany w wybranych lokalizacjach oraz obiekty o znacznej kubaturze różniące się przeznaczeniem.

  • Saccharides
    • Hanna Staroszczyk
    2023

    Saccharides are widely distributed in nature as the major component of fruits and vegetables (primarily monosaccharides), milk and malt (mainly disaccharides), and grains (mostly polysaccharides). They are an important source of energy, structural material, as well as flavor and taste factors. Molecules of this class of compounds contain mainly carbon, hydrogen, and oxygen atoms; however, most natural saccha- rides do not have a simple chemical composition but occur as oligomers or polymers, in pure, oxidized, or reduced form, as derivatives of amines, esters, and ethers, as well as protein- or lipid-bound molecules. The variety of saccharide structures, the size, shape, and chemical composition of their molecules, as well as the diversity of their physicochemical properties, affect the functional properties and nutritional value of foods.

  • Samorządowi konserwatorzy zabytków jako wykonawcy zadań wojewódzkich konserwatorów zabytków. Krótkie podsumowanie eksperymentu.
    • Robert Hirsch
    2023 Full text Ochrona Dziedzictwa Kulturowego

    Artykuł dotyczy kwestii realizacji jednego z zadań z zakresu ochrony zabytków przez samorządy lokalne. Przedstawiono kwestię wykonywania zadań z zakresu administracji rządowej przez samorządowych konserwatorów zabytków na podstawie porozumień wojewodów z samorządami lokalnymi. Rozwiązanie to związane były ze znacznymi oczekiwaniami środowiska konserwatorskiego. Po ponad 20 latach funkcjonowania samorządowych konserwatorów zabytków, wykonujących powierzone zadania WKZ można już częściowo podsumować efektywność tego rozwiązania. Doświadczenia nie są jednak jednoznaczne. Obok wielu korzyści i dobrego funkcjonowania współpracy organów państwowych i samorządowych na bazie porozumień, są też przykłady braku współpracy i w efekcie rozwiązywania takich porozumień, zwłaszcza w ostatnich 10 latach. Skłania to do wniosku, że rozwiązanie to nie może być traktowane jako optymalne i konieczne są dalsze zmiany w celu jego poprawy.

  • Satellite Laser Ranging technique as a tool for the determination of the Schwarzschild, de Sitter and Lense-Thirring effects
    • Maciej Matyszewski
    • Paweł Łejba
    • Marcin Jagoda
    • Paweł Tysiąc
    2023 Full text REPORTS ON GEODESY AND GEOINFORMATICS

    Satellite Laser Ranging (SLR) is a modern technique used in various research areas and applications related to geodesy and geodynamics. It is commonly used for tasks such as establishing the International Terrestrial Reference Frame (ITRF), monitoring Earth Orientation Parameters (EOP), determining the geocenter, measuring fundamental physical constants, calibrating microwave tracking techniques, conducting time transfer experiments, and studying gravitational and general relativistic effects. Laser measurements of the LARES and LAGEOS satellites are used to determine the relativistic effects acting on these satellites. The objective of the present research is to analyze the perturbing forces of relativistic origin (Schwarzschild, de Sitter and Lense-Thirring effects) acting on the LARES, LAGEOS-1 and LAGEOS-2 satellites. By using data from fifteen SLR measurement stations, the precise orbits of these satellites were determined over a span of 840 hours using the GEODYN II orbital software package. The calculation process used a set of procedures, models of forces, and constants that are currently recommended by the International Earth Rotation and Reference Systems Service (IERS) and the International Laser Ranging Service (ILRS). Based on the precise orbits of the LARES, LAGEOS-1, and LAGEOS-2 satellites, calculations were made to determine the values of relativistic accelerations acting on these satellites. These values oscillate with a period equal to half of the orbital period for the de Sitter and Lense-Thirring effects, and a quarter of the orbital period for the Schwarzschild effect.

  • Scale effect in the self-propulsion prediction for Ultra Large Container Ship with contra-rotating propellers
    • Hanna Pruszko
    • Maciej Reichel
    • Krzysztof Czerski
    • Marek Necel
    • Julia Schmale
    • Sören Brüns
    2023 Full text

    This article addresses the problem of the scale effect for an Ultra Large Container Ship (ULCS) with a novel twin-crp-pod propulsion system. Twin-crp-pod steering-propulsion arrangement is an innovative solution that gains from three well-known systems: twin-propeller, contra-rotating propellers and pod propulsors. It is expected that applying the twin-crp-pod system to the analysed Ultra Large Container Ship will increase propulsion efficiency and manoeuvring safety. To prove that, a series of model tests have been carried out, including towing tank tests and free-sailing manoeuvring tests. The scope of the presented simulations included calm water resistance simulations and self-propulsion tests for the full-scale and model-scale vessels. The model-scale calculations have been performed at a scale of 1:37.416. During self-propulsion simulations, the required front and aft propeller revolutions were searched to find the optimum power balance. Calculations were performed for the ship design speed and constant front-to-aft propeller revolutions ratio. The case study vessel was a 400m Ultra Large Container Ship. CFD Simulations were performed using the unsteady RANS approach. The sliding mesh approach with a rotating region around the local coordinate system was used to model the propeller directly. The flow was turbulent with the k-ω SST turbulence model applied. The second-order implicit temporal discretisation scheme was applied. Parallel, due to the early stage of research, an extrapolation method including the wake scaling, propellers interactions and pod housing resistance is being elaborated. Later on, the model-scale CFD results will be extrapolated and compared to the results of the full-scale simulations. As for now, the comparison included the total resistance of the bare hull, wake fraction, relative rotational efficiency, thrust deduction and propeller revolution required to achieve the self-propulsion point.

  • Scaling scrum with a customized nexus framework: A report from a joint industry‐academia research project
    • Andrzej Joskowski
    • Adam Przybyłek
    • Bartosz Marcinkowski
    2023 Full text SOFTWARE-PRACTICE & EXPERIENCE

    espite a wide range of scaling frameworks available, large-scale agile transformations are not straightforward undertakings. Few organizations have structures in place that fit the predefined workflows – while once one applies an off-the-shelf framework outside of its prescribed process, guidance quickly runs out. In this paper, we demonstrate how to instantiate a method configuration process using a lightweight experimental approach embedded in Action Research cycles. The proposed approach was developed to assist practitioners working on a multiple-team project at Intel Technology Poland to find the right practices to continue their Nexus-based transformation and integrate their in-house method into the already established company structures, processes, and routines. In particular, it enabled identifying a series of challenges with scaled practices and coping with those. The challenges ranged from logistical problems, through poor availability of the Product Owner, to lackluster knowledge transfer and a wide array of communication/coordination issues at meetings. The study broadens the current body of knowledge within technology management and the scaled agile method-tailoring domain. It indicates potential corrective actions that may be taken advantage of by entities that are not inclined, due to organizational constraints, to directly implement an off-the-shelf framework. Furthermore, our study demonstrates that a gradual transition to large-scale agile at the project level (1) is possible with the preservation of traditional command-and-control management practices; (2) requires neither middle management involvement nor upfront investment; and (3) does not need to disrupt the continuous delivery of the product.

  • Scarabaeidae as human food – A comprehensive review
    • Shahida Anusha Siddiqui
    • K.a. Ampofo
    • E.k. Dery
    • A.m. Eddy-Doh
    • Roberto Castro Munoz
    • M. Pushpalatha
    • I. Fernando
    2023 Full text Journal of Insects as Food and Feed

    Rising global population and sustainable protein demand have sparked interest in unique food sources. Entomophagy, or insect consumption, presents a solution and Scarab beetles, part of the Scarabaeidae family, offer a novel food option. The comprehensive review underscores their potential as human food, with strong nutrition, low environmental impact, and the ability to ease strain on conventional agriculture. Nutritional analysis reveals rich protein content, essential amino acids, vitamins, and minerals. Scarab beetles’ beneficial fatty acid profile and healthy fats position them as a superior protein source to traditional livestock. Scarabaeidae excel in feed conversion, emit fewer greenhouse gases, and require minimal land, establishing them as an ecologically sustainable protein source. Cultural attitudes towards insect consumption vary; history exists in some regions while skepticism prevails in others. Highlighting nutritional advantages, organizing outreach, and introducing processed scarab products could enhance acceptance. The review addresses challenges including mass rearing, processing, allergens, and toxins. Evolving insect-based food regulations require cautious consideration. Success depends on multidisciplinary efforts including nutrition, environmental sustainability, cultural openness, and regulatory alignment. Continued research and collaboration are essential to fully unlock Scarabaeidae’s potential as a sustainable, nutritious food source for our growing global population.

  • Scheduling for Industrial Control Traffic Using Massive MIMO and Large Intelligent Surfaces
    • Emma Fitzgerald
    • Michał Pióro
    2023

    Industry 4.0, with its focus on flexibility and customizability, is pushing in the direction of wireless communication in future smart factories, in particular massive multiple-input multiple-output (MIMO), and its future evolution Large Intelligent Surfaces (LIS), which provide more reliable channel quality than previous technologies. As such, there arises the need to perform efficient scheduling of industrial control traffic in massive MIMO systems, in a way that meets its highly stringent latency and reliability requirements. In this paper, we provide mixed-integer programming optimization formulations to perform this scheduling, while minimizing the use of radio resources. We give formulations for both fixed and variable schedule frame lengths. We tested our formulations in numerical experiments with varying traffic profiles and numbers of nodes, up to a maximum of 32 nodes. For all problem instances tested, we were able to calculate an optimal schedule within less than 1 s, making our approach feasible for use in real deployment scenarios.

  • Screening of predicted synergistic multi-target therapies in glioblastoma identifies new treatment strategies
    • Megan Houweling
    • Anna Giczewska
    • Abdul Kulsoom
    • Ninke Nieuwenhuis
    • Asli Küçükosmanoglu
    • Krzysztof Pastuszak
    • Rogier C Buijsman
    • Peter Wesseling
    • Laurine Wedekind
    • David Noske
    • Anna Supernat
    • David Bailey
    • Colin Watts
    • Thomas Wurdinger
    • Bart Westerman
    2023 Full text Neuro-Oncology Advances

    Abstract Background IDH-wildtype glioblastoma (GBM) is a highly malignant primary brain tumor with a median survival of 15 months after standard of care, which highlights the need for improved therapy. Personalized combination therapy has shown to be successful in many other tumor types and could be beneficial for GBM patients. Methods We performed the largest drug combination screen to date in GBM, using a high-throughput effort where we selected 90 drug combinations for their activity onto 25 patient-derived GBM cultures. 43 drug combinations were selected for interaction analysis based on their monotherapy efficacy and were tested in a short-term (3 days) as well as long-term (18 days) assay. Synergy was assessed using dose-equivalence and multiplicative survival metrics. Results We observed a consistent synergistic interaction for 15 out of 43 drug combinations on patient-derived GBM cultures. From these combinations, 11 out of 15 drug combinations showed a longitudinal synergistic effect on GBM cultures. The highest synergies were observed in the drug combinations Lapatinib with Thapsigargin and Lapatinib with Obatoclax Mesylate, both targeting epidermal growth factor receptor and affecting the apoptosis pathway. To further elaborate on the apoptosis cascade, we investigated other, more clinically relevant, apoptosis inducers and observed a strong synergistic effect while combining Venetoclax (BCL targeting) and AZD5991 (MCL1 targeting). Conclusions Overall, we have identified via a high-throughput drug screening several new treatment strategies for GBM. Moreover, an exceptionally strong synergistic interaction was discovered between kinase targeting and apoptosis induction which is suitable for further clinical evaluation as multi-targeted combination therapy.

  • Screen-printed Sn-doped TiO2 nanoparticles for photocatalytic dye removal from wastewater: A technological perspective
    • Atasheh Soleimani-Gorgani
    • Hussein Al-Hazmi
    • Amin Esmaeili
    • Sajjad Habibzadeh
    2023 ENVIRONMENTAL RESEARCH

    TiO2 is widely used as a photocatalyst with a wide band gap, which limited its application. Ion doping and formulating a high-quality screen-printing paste enhance its features. However, the printability of objects for advanced application seems essential nowadays. In this research, the Sn-doped TiO2 nanoparticles were prepared through a sol-gel method followed by calcination at various temperatures of 450 °C, 550 °C, 650 °C, 750 °C, and 850 °C. Screen-printing pastes were prepared with 18 wt% of the synthesized Sn-doped TiO2 nanoparticles to evaluate photocatalytic activity. Finally, the prepared paste with optimum nanoparticle concentration was screen printed onto the microscope glass slides at various printing times (1, 3, and 5 runs) and annealed at 500 °C temperature to investigate the thickness of printed Sn-doped TiO2 nanoparticles effect. The photocatalytic activity and crystal structure of nano Sn-doped-TiO2 were characterized using photoluminescence (PL) spectroscopy and X-ray diffraction (XRD). Transmission electron microscopy (TEM) and scanning electron microscope (SEM) analyses were conducted to investigate the size and morphology of the prepared nanoparticles, respectively. The highest photocatalytic activity for the degradation of methylene blue was obtained at the calcination temperature of 450 °C.

  • Scrutiny of power grids by penetrating PV energy in wind farms: a case study of the wind corridor of Jhampir, Pakistan
    • Arsalan Muhammad Soomar
    • Lyu Guanghua
    • Shoaib Shaikh
    • Syed Hadi Hussain Shah
    • Piotr Musznicki
    2023 Full text Frontiers in Energy Research

    This study examines the problems caused by intermittent renewable energy sources, especially wind farms, and suggests a different solar energy penetration strategy to improve their loading capacity. The study uses real-time data from a wind farm in Jhampir, Pakistan, to analyse and assess various aspects of grid stations connected to wind farms. Electrical Transient Analyzer Program is used to validate the results by linking these with actual grid system. The article focuses on creating a model for a grid connected to a wind farm and the simulation of outcomes following capacity expansion, with the installation of an autotransformer. The original capacity of the wind farm was 750 MW, which was increased to 1,250 MW, i.e., 1.66 times the actual capability. Furthermore, this capacity was further enhanced to 1,540 MW, which becomes 1.23 times the previous capacity by the penetration of a photovoltaic power plant

  • "SDG # pawilon tematyczny"-plakat do wystawy
    • Agnieszka Kurkowska
    2023

    plakat prezentujący założenia wystawianych projektów

  • "SDG # pawilon tematyczny"-wystawa projektów studenckich
    • Agnieszka Kurkowska
    • Alicja Karaś
    2023

    Zgromadzenie Ogólne Organizacji Narodów Zjednoczonych w 2015 roku przyjęło Rezolucję 70/1 “Przekształcamy nasz świat: Agenda na rzecz zrównoważonego rozwoju 2030”. Jest to plan działań na rzecz ludzi, planety i dobrobytu oraz wzmocnienia powszechnego pokoju w warunkach większej wolności. Jest wdrażany przez wszystkie kraje w ramach współpracy partnerskiej. Agenda 2030 wyrażona jest poprzez 17 Celów Zrównoważonego Rozwoju (SDG Sustainable Development Goals) i 169 towarzyszących im działań. Projekty studenckie miały na celu stworzenie 'pawilonów tematycznych’ uwzględniających realizację jednego, wybranego celu. Pawilon łatwy w transporcie (3x6x4,5m), o konstrukcji umożliwiającej przemieszczanie, jest propozycją dla Gdańska na zabezpieczenie potrzeb lokalnych widzianych przez pryzmat Agendy 2030. Zaproponowane usytuowanie uwzględnia specyfikę miasta i atuty miejsca. Przyjęte funkcje są propozycjami autorskimi. Zgodnie z założeniami projektu, każdy obiekt musi jednocześnie umożliwiać zamieszkiwanie w sytuacjach kryzysowych.