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Gdańsk University of Technology

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Publications from the year 2020

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  • Relacje międzyorganizacyjne w dobie Industry 4.0
    • Anna Horzela
    • Ewa Salecka
    • Edyta Gołąb-Andrzejak
    • Anna Tomaszuk
    2020 Full text

    Strukturę opracowania zbudowano w odniesieniu do zagadnienia relacji międzyorganizacyjnych. Omawianą kwestię osadzono w obecnych realiach Industry 4.0. Celem monografii jest omówienie roli Industry 4.0 w budowaniu i rozwoju relacji międzyorganizacyjnych oraz w kształtowaniu ich specyfiki. W pięciu rozdziałach przedstawiono aspekty „sieciowego” powiązania różnych podmiotów i jednostek na gruncie teorii zarządzania. Opracowanie otwiera nakreślenie założeń dotyczących koncepcji Industry 4.0. Kolejny rozdział poświęcono koncepcji kapitału relacyjnego przedsiębiorstw. W nawiązaniu do tematyki rozdziału 2 w kolejnym dokonano rozwinięcia koncepcji organizacji sieciowych. W kolejnych rozdziałach (4 i 5) zaprezentowano przykłady rozwoju relacji międzyorganizacyjnych: koncepcję zaangażowania klientów biznesowych (BCE) oraz koncepcję społecznej odpowiedzialności biznesu (CSR).

  • Relatively high-Seebeck thermoelectric cells containing ionic liquids supplemented by cobalt redox couple
    • Anita Sosnowska
    • Edith Laux
    • Herbert Keppner
    • Tomasz Puzyn
    • Maciej Bobrowski
    2020 Full text JOURNAL OF MOLECULAR LIQUIDS

    Meanwhile no general and reliable equation determining the Seebeck coefficient (S e ) and involving electro-chemical reaction effects was derived for solutions. We reported the database of 15,000 ionic liquids supplemented by three different redox couple systems: 0.01 mol/l Co 3+/2+ (bpy) 3 , 0.01 mol/l I 3-/3I- and 0.2 mol/l 3- /3I- , and the corresponding estimated Seebeck coefficients. We also reported methods for estimating Seebeck coefficients for those systems. First, Seebeck coefficients were measured for 17 ionic liquids and the 3 redox couples independently, and afterwards an analytical QSPR equation was derived after which the Seebeck coefficients for all possible combinations of cations and anions (resulting in 15,000 conceivable ionic liquid compounds) were derived. Following this, we analyzed the data and discovered tendencies and regularities. It was revealed that small, symmetrical and not branched cations and anions which contained less electronegative atoms, made the Seebeck increased. The highest S e = 2.3 mV/K, was observed for small ammonium and phosphonium cations with a triethyl-n-hexylboride anion. We also discovered that for thermo-electric applications cobalt-based redox couples are much better than the ones based on the iodine/iodide system.

  • Reliability of Corroded Stiffened Plate Subjected to Uniaxial Compressive Loading
    • Krzysztof Wołoszyk
    • Yordan Garbatov
    2020 International Journal of Maritime Engineering

    The work is focused on the reliability of corroded stiffened plates subjected to compressive uniaxial load based on the progressive collapse approach as stipulated by the Common Structural Rules for Bulk Carriers and Oil Tankers, employing the limit state design. Two different cases have been investigated. In the first model, the corrosion degradation led to uniform thickness loss, whereas the mechanical properties were unchanged, as given in the Rules. In the second model, the plate thickness degradation was followed by mechanical properties reduction. The uncertainties related to the mechanical properties, thicknesses, and initial imperfections of the corroded stiffened plate were taken into account. Several initial design solutions of stiffened plates, as well as different severity levels of corrosion degradation were investigated. The results show that structural reliability significantly decreases with corrosion development, especially when in addition to the initial imperfections and corrosion plate thickness reduction, corroded plate surface roughness and the changes in the mechanical properties were considered. The uncertainties, their origins and confidence levels are discussed. It was found that non-linear time-dependent corrosion degradation accounting not only for the thickness reduction due to corrosion wastage but also the subsequent decrease of mechanical properties lead to a significant reduction in the reliability index. Additionally, it was defined that the reliability estimate is very sensitive to the uncertainties related to the initial thickness and the spread of corrosion degradation as a function of the time. Incorporating the probability of corrosion detection into the original reliability model introduces additional information about the validity of structural degradation that may lead to a higher beta reliability index estimate compared to the original model.

  • Reliability-Based Stability Analysis of a Baltic Cliff by the Combined Response Surface Method
    • Karol Winkelmann
    • Lesław Zabuski
    • Jarosław Przewłócki
    • Jarosław Górski
    2020 Full text Geotechnical and Geological Engineering

    A simple, straightforward computational procedure was proposed, incorporating the Response Surface Method (RSM) linked with the standard Monte Carlo (MC) simulation method and the Point Estimate Method (PEM). PEM samples make it possible to analyse the sensitivity of the cliff’s stability to variation in subsoil parameters and to reduce the number of random variables of the problem. The proposed methods were tested in two cases: a high failure probability (undrained state) and a moderate failure probability (drained case). The proposed method (CRSM) has been applied to probabilistic stability analysis of a Baltic cliff in Jastrzebia Gora, Poland.

  • Reliable OFDM Data Transmission with Pilot Tones and Error-Correction Coding in Shallow Underwater Acoustic Channel
    • Iwona Kochańska
    2020 Full text Applied Sciences-Basel

    The performance of Underwater Acoustic Communication (UAC) systems are strongly related to the specific propagation conditions of the underwater channel. Horizontal, shallow-water channels are characterised by extremely disadvantageous transmission properties, due to strong multipath propagation and refraction phenomena. The paper presents the results of communication tests performed during a shallow, inland-water experiment with the use of a laboratory model of a UAC system implementing the Orthogonal Frequency-Division Multiplexing (OFDM) technique. The physical layer of data transmission is partially configurable, enabling adaptation of the modulation and channel coding parameters to the specific propagation conditions. The communication tests were preceded by measurement of the UAC channel transmission properties. Based on the estimated transmission parameters, four configurations of OFDM modulation parameters were selected, and for each of them, communication tests were performed with the use of two Error-Correction Coding (ECC) techniques. In each case, the minimum coding rate was determined for which reliable data transmission with a Bit Error Rate (BER) of less than 10−4 is possible

  • Reliable Surrogate Modeling of Antenna Input Characteristics by Means of Domain Confinement and Principal Components
    • Anna Pietrenko-Dąbrowska
    • Sławomir Kozieł
    2020 Full text Electronics

    A reliable design of contemporary antenna structures necessarily involves full-wave electromagnetic (EM) analysis which is the only tool capable of accounting, for example, for element coupling or the effects of connectors. As EM simulations tend to be CPU-intensive, surrogate modeling allows for relieving the computational overhead of design tasks that require numerous analyses, for example, parametric optimization or uncertainty quantification. Notwithstanding, conventional data-driven surrogates are not suitable for handling highly nonlinear antenna characteristics over multidimensional parameter spaces. This paper proposes a novel modeling approach that employs a recently introduced concept of domain confinement, as well as principal component analysis. In our approach, the modeling process is restricted to the region containing high-quality designs with respect to the performance figures of antennas under design, identified using a set of pre-optimized reference designs. The model domain is spanned by the selected principal components of the reference design set, which reduces both its volume and dimensionality. As a result, a reliable surrogate can be constructed over wide ranges of both operating conditions and antenna parameters, using small training datasets. Our technique is demonstrated using two antenna examples and is favorably compared to both conventional and constrained modeling approaches. Application case studies (antenna optimization) are also discussed.

  • Remote Sensing in Vessel Detection and Navigation
    • Henning Heiselberg
    • Andrzej Stateczny
    2020 Full text SENSORS

    The Special Issue (SI) “Remote Sensing in Vessel Detection and Navigation” highlighted a variety of topics related to remote sensing with navigational sensors. The sequence of articles included in this Special Issue is in line with the latest scientific trends. The latest developments in science, including artificial intelligence, were used. The 15 papers (from 23 submitted) were published.

  • REPORT Verification expertise of Detroit Diesel engines 16V149TI on the vessel ORP GEN. PUŁASKI
    • Zbigniew Korczewski
    • Jacek Rudnicki
    2020

    Verification expertise of propulsion engines for generating sets of the ORP GEN. PUŁASKI - type 16V149TI related to a complaint sent by the shipowner to Shiprepair Yard NAUTA S.A.

  • Research of electric drive systems with real time software configurable control
    • A. Anuchin
    • G.l. Demidova
    • Yu. Vagapov
    • Ryszard Strzelecki
    2020 Full text Science, Technology and Arts Research Journal

    Предмет исследования. Представлен учебно-лабораторный стенд для исследования систем управления элек- троприводами. Стенд используется для обучения студентов системам управления электроприводами и предна- значен для повышения эффективности усвоения материала. Метод. В основу предлагаемого решения положен метод взаимного нагружения электрических машин, питаемых от силовых преобразователей с общим звеном постоянного тока. Это позволяет использовать одну электрическую машину в качестве испытуемой, а другую — в качестве нагрузочной, и наоборот. Обеспечивается переток мощности от машины, работающей в генераторном режиме, к машине, функционирующей в двигательном. Подобное решение обеспечивает энергосберегающий режим работы — из сети потребляются только мощности для покрытия потерь в силовых преобразователях и машинном агрегате. Для изучения различных структур систем управления электродвигателей постоянного и переменного тока предложен способ организации программного обеспечения со свободно конфигурируемой структурой. Основные результаты. Приведено описание лабораторных стендов. Каждый стенд содержит двухмашинный агрегат, где электродвигатель получает питание от своего полупроводникового преобразователя, управляемого в реальном времени микроконтроллерной системой. Созданное программное обеспечение позво- ляет синтезировать исследуемую структуру управления с помощью настроек системы управления. Настройка осуществляется с использованием ряда свободно конфигурируемых управляющих элементов, которые ком- пилируются в алгоритм управления микроконтроллером. Безопасное выполнение эксперимента обеспечивает алгоритм управления, работающий во взаимодействии с основной программой, работающей в реальном времени. Таким образом, обеспечивается защита электродвигателей и силовых преобразователей. Наличие встроенных программных средств защиты позволило добиться надежной работы электроприводов мощностью 1,5 кВт и обе- спечить близкие к промышленным характеристики. Приведено подробное описание особенности лабораторного оборудования и его программного обеспечения для системы векторного управления асинхронным двигателем. Пример демонстрирует настройку систем управления, компиляцию исполняемого кода, процедуру проведения эксперимента и анализ результатов. Представленные результаты могут быть полезны научным и научно-педагогическим работникам, занимающимся подготовкой специалистов в области систем управления электроприводами.

  • RESEARCH ON ORGANIC COATINGS DESIGNED FOR UNDERWATER APPLICATIONS
    • Juliusz Orlikowski
    • Agata Jażdżewska
    • Kacper Jurak
    2020 Full text ARCHIVES OF METALLURGY AND MATERIALS

    Underwater steel structures require periodic maintenance. In the case of vessels, anti-corrosion works are carried out in the shipyard, where very good conditions for applying organic protective coatings can be provided. Very good surface preparation can be obtained by the use of abrasive blasting. The well-prepared metal surface is free from impurities (particularly inorganic salts). Suitable conditions for the application and renovation of coatings are also ensured (creating appropriate climatic conditions, drying the air, setting the appropriate air temperature). However, there are underwater constructions that cannot be transferred above the water level and, therefore, their conservation against corrosion can take place only under the surface of the water, which significantly hinders the execution of renovation works. In this work, protective coatings for underwater application were tested. The application of coatings on selected steel surfaces over and under the water was carried out. Physico-mechanical and electrochemical tests were carried out in order to assess the quality of the obtained corrosion protection. The possible difficulties faced when applying coatings in marine conditions were discussed.

  • Residue-Pole Methods for Variability Analysis of S-parameters of Microwave Devices with 3D FEM and Mesh Deformation
    • Mehrdad Rahimzadeh Rufuie
    • Adam Lamęcki
    • Piotr Sypek
    • Michał Mrozowski
    2020 Full text RADIOENGINEERING

    This paper presents a new approach for variability analysis of microwave devices with a high dimension of uncertain parameters. The proposed technique is based on modeling an approximation of system by its poles and residues using several modeling methods, including ordinary kriging, Adaptive Polynomial Chaos (APCE), and Support Vector Machine Regression (SVM). The computational cost is compared with the traditional Monte-Carlo method. To improve the efficiency, mesh deformation is applied within 3D FEM framework.

  • Resilience of 5G Mobile Communication Systems to Massive Disruptions
    • Tibor Cinkler
    • Akos Ladanyi
    • Jacek Rak
    • Christian Esposito
    • Gianluca Rizzo
    2020

    This chapter discusses vital techniques to enhance the resilience of 5G systems. It starts with dependability assessment of 5G networks. Next, it describes (a) the frequency fallback technique to improve availability and survivability of 5G services, (b) segment interleaving scheme to enhance communications resilience between base stations and the remaining part of the network and (c) multi-operator protection to address the resilience issues in a multi-operator scenario when one of the operators fails to deliver services, and the backup service can be provided to its users by another operator. Finally, it focuses on energy-aware techniques for dynamic management of base station configuration and of load distribution aimed at maximizing network survivability in case of disaster.

  • Respiratory signals derived from capacitive electrocardiogram on the smart chair
    • Adam Bujnowski
    • Mariusz Kaczmarek
    • Jerzy Wtorek
    • Kamil Osiński
    • Clemens Nieke
    • Edith Birrer
    2020 Full text

    Capacitive electrocardiogram (CECG) tends to deliver basic cardiac signals without need to use traditional glued electrodes. In the paper analysis of possibility if the ECG derived respiratory waveforms out of the CECG.

  • Response of cylindrical steel tank under stochastically generated non-uniform earthquake excitation
    • Daniel Burkacki
    • Robert Jankowski
    2020 Full text AIP Conference Proceedings

    Cylindrical steel tanks are very important structures in industrial facilities since their application is related to storing different types of products. Their safety and reliability have become a crucial issue because any damage may cause significant consequences, including ecological disaster. The most dangerous dynamic load acting on cylindrical steel tanks is related to earthquakes, especially that the seismic excitation may differ from place to place due to spatial seismic effects related to the propagation of seismic wave. Previous studies have confirmed that such non-uniform earthquake excitation may influence the response of large structures significantly. Stochastic methods of analysis have become an advantageous approach to simulate a spatiotemporal variation of ground motion field for the earthquake engineering problems. The aim of the present paper is to show the results of FEM numerical investigation focused on the response of a cylindrical steel tank under stochastically generated non-uniform earthquake excitation. The analysis has been conducted for the tank fully filled with petroleum. A method of conditional stochastic simulation of ground motions, using the spatiotemporal correlation function, has been applied to generate unknown acceleration time histories for different support locations, based on the earthquake record specified for one location. The results of the analysis clearly indicate that the consideration of spatial effects related to seismic wave propagation leads to the considerable changes in the response of cylindrical steel tank under earthquake excitation. It has also been shown that the application of the stochastic simulation with the spatiotemporal correlation function is an effective method which can be successfully used to generate earthquake records in different locations so as to consider the non-uniform ground motion excitation.

  • Results from a Genome-Wide Association Study (GWAS) in Mastocytosis Reveal New Gene Polymorphisms Associated with WHO Subgroups
    • Bogusław Nedoszytko
    • Marta Sobalska-Kwapis
    • Dominik Strapagiel
    • Magdalena Lange
    • Aleksandra Górska
    • Joanne N.G. Oude Elberink
    • Jasper van Doormaal
    • Marcin Słomka
    • Leszek Kalinowski
    • Marta Gruchała-Niedoszytko
    • Roman J. Nowicki
    • Peter Valent
    • Marek Niedoszytko
    2020 Full text INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES

    Mastocytosis is rare disease in which genetic predisposition is not fully understood. The aim of this study was to analyze associations between mastocytosis and single nucleotide polymorphisms (SNPs) by a genome-wide association study (GWAS) approach. A total of 234 patients were enrolled in our study, including 141 with cutaneous mastocytosis (CM; 78 children and 63 adults) and 93 with systemic mastocytosis (SM, all adults). The control group consisted of 5606 healthy individuals. DNA samples from saliva or blood were genotyped for 551 945 variants using DNA microarrays. The prevalence of certain SNPs was found to vary substantially when comparing patients and healthy controls: rs10838094 of 5OR51Q1 was less frequently detected in CM and SM patients (OR = 0.2071, p = 2.21 × 10 − 29 ), rs80138802 in ABCA2 (OR = 5.739, p = 1.98 × 10 − 28 ) , and rs11845537 in OTX2-AS (rs11845537, OR = 6.587, p = 6.16 × 10 − 17 ) were more frequently detected in CM in children and adults. Additionally, we found that rs2279343 in CYP2B6 and rs7601511 in RPTN are less prevalent in CM compared to controls. We identified a number of hitherto unknown associations between certain SNPs and CM and / or SM. Whether these associations are clinically relevant concerning diagnosis, prognosis, or prevention remains to be determined in future studies.

  • Retrievable strain measuring system in screw displacement piles - readings and results interpretation problems
    • Mateusz Wiszniewski
    • Adam Krasiński
    2020

    Static load tests on foundation piles are generally carried out in order to determine load – displacement characteristic of the pile. For more detailed information, e.g. force distribution along the shaft, load transfer mechanism and characteristics of soil-structure interaction (unit resistance curves t-z, q-z) additional pile instrumentation is required. Most popular techniques focus on direct concrete strain measurements and their conversion into calculated loads. However, proper determination of that forces requires the exact value of pile material stiffness (EA). Due to difficulties in determination of that stiffness, additionally hampered by the practical lack of knowledge about the pile shafts real geometry, very often the interpretation results of instrumented load tests are inadequate and can be subjected to significant errors. This short paper presents general problems concerning the determination of reinforced concrete properties used to interpret the results of static load tests on instrumented piles. Characteristics of elastic modulus variability with strain and depth, shaft deformations and possible changes in cross section area are determined. Several case stories of instrumented pile load tests, geometry check, material laboratory testing are discussed in the paper and will be presented during the conference.

  • Re-use of the 20th century aviation infrastructure.=Adaptacje XX-wiecznej infrastruktury lotniskowej
    • Agnieszka Szuta
    2020 Full text Przestrzeń i Forma

    This article explores issues related to the adaptation of former aviation infrastructure. For research purposes, several adaptations of former airports and airplane hangars are selected and presented. Those examples show the importance of this infrastructure in today's urbanized landscape, as well as in history, and thus the social and cultural values it brings. The benefits of the redevelopment of former airport sites are also presented. W niniejszym artykule poruszone zostają kwestie związane z adaptacjami dawnej infrastruktury lotniskowej. W celach badawczych z grupy opuszczonych lotnisk wybrano i przeanalizowano kilka zaadaptowanych obiektów. Wyselekcjonowane przykłady pozwoliły na przedstawienie istotnej roli XX-wiecznej infrastruktury lotniskowej w dzisiejszym krajobrazie zurbanizowanym oraz jej wartości społeczne i kulturowe. Ukazano również zalety ponownego wykorzystania dawnych terenów lotni-czych i znajdujących się tam obiektów.

  • REVIEW OF CURRENT RESEARCH ON CHITOSAN AS A RAW MATERIAL IN THREE-DIMENSIONAL PRINTING TECHNOLOGY IN BIOMEDICAL APPLICATIONS
    • Szymon Mania
    • Adrianna Banach
    • Robert Tylingo
    2020 Full text Progress on Chemistry and Application of Chitin and Its Derivatives

    Three-dimensional (3D) biomaterial manufacturing strategies show an extraordinary driving force for the development of innovative solutions in the biomedical sector, including drug delivery systems, disease modelling and tissue and organ engineering. Due to its remarkable and promising biological and structural properties, chitosan has been widely studied for decades in several potential applications in the biomedical field. However, tools in the form of 3D printers have created new possibilities for the production of chitosan models, implants and scaffolds for cell cultures that are much more precise than existing ones. The article presents current achievements related to the possibility of using chitosan to create new materials for 3D printing in the form of chitosan bioinks, filaments, resins and powders dedicated for bioprinting, fused deposition modelling, stereolithography/digital light processing and selective laser sintering methods, respectively.

  • Review of the Application of Graphene-Based Coatings as Anticorrosion Layers
    • Karolina Ollik
    • Marek Lieder
    2020 Full text Coatings

    Due to the excellent properties of graphene, including flexibility that allows it to adjust to the curvature of the substrate surface, chemical inertness, and impermeability, graphene is used as an anticorrosion layer. In this review, we present the current state-of-the-art in the application of graphene in the field of protective coatings. This review provides detailed discussions about the protective properties of graphene coatings deposited by dierent methods, graphene-based organic coatings, the modification of graphene-based coatings, and the effects of graphene functionalization on the corrosion resistance of protective coatings.

  • Review on Current Status of Echinocandins Use
    • Martyna Mroczyńska
    • Anna Brillowska-Dąbrowska
    2020 Full text Antibiotics-Basel

    Fungal infections are rising all over the world every year. There are only five medical compound classes for treatment: triazoles, echinocandins, polyenes, flucytosine and allylamine. Currently, echinocandins are the most important compounds, because of their wide activity spectrum and much lower sides effects that may occur during therapy with other drugs. Echinocandins are secondary metabolites of fungi, which can inhibit the biosynthesis of β-(1,3)-D-glucan. These compounds have fungicidal and fungistatic activity depending on different genera of fungi, against which they are used. Echinocandin resistance is rare—the major cause of resistance is mutations in the gene encoding the β-(1,3)-D-glucan synthase enzyme. In this review of the literature we have summarized the characteristics of echinocandins, the mechanism of their antifungal activity with pharmacokinetics and pharmacodynamics, and the resistance issue.