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Publications Repository
Gdańsk University of Technology

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Publications from the year 2018

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  • The spatial planning of industrial areas in an urbanized area for cargo, in the development of inland waterway transport
    • Patrycja Jerzyło
    • Aleksandra Wawrzyńska
    2018 Full text E3S Web of Conferences

    Spatial planning, taking into account the configuration of the surface, i.e. its shape (relief) and the presence and mutual location of objects and points of characteristic water ports, is a derivative of several natural, economic, market, technical, social and political factors. It depends on the destination port, the planned structure of trade in cargo, the forecasted traffic of ships, passageways, the technology of reloading used, as well as on the anticipated demand for the development of shipping and trade by sea and inland waterway. The article analyzes the transport accessibility of the Port of Gdynia through the construction of a dock to determine the proposals for improving the conditions of transported cargo.

  • The structurally similar TRFH domain of TRF1 and TRF2 dimers shows distinct behaviour towards TIN2
    • Umesh Kalathiya
    • Monikaben Padariya
    • Maciej Bagiński
    2018 ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS

    The telomere repeat binding-factor 1 and 2 (TRF1 and TRF2) proteins of the shelterin complex bind to duplex telomeric DNA as homodimers, and the homodimerization is mediated by their TRFH (TRF-homology) domains. We performed molecular dynamic (MD) simulations of the dimer forms of TRF1TRFH and TRF2TRFH in the presence/absence of the TIN2TBM (TIN2, TRF-interacting nuclear protein 2, TBM, TRF-binding motif) peptide. The MD results suggest that TIN2TBM is necessary to ensure the stability of TRF1TRFH homodimer but not the TRF2TRFH homodimer. In TRF1-TIN2-TRF2 complex, the peptide enhances the protein-protein interactions to yield a stable heterodimer. Both monomers in TRF1TRFH homodimer interact almost equally with the peptide, whereas in TRF2TRFH homodimer, monomer TRF2TRFH(M1) exhibits more dominant interactions than the TRF2TRFH(M2). The common residues of TRF1/2TRFH(M1) that form interactions with TIN2TBM in all peptide-bound systems originate from the H3 (helix) and L3 (loop) regions. Additionally, in the homodimer systems, residues of TRF1/2TRFH(M2) also interact with the peptide. The residue pair E71-K213 is responsible for different conformations of TRF1TRFH homodimers; specifically, this residue pair enhances the protein-peptide/protein interactions in peptide-bound/unbound systems, respectively. TRF1TRFH and TRF2TRFH proteins have a conserved but different interface responsible for the protein-protein/peptide interactions that exist in the corresponding dimers.

  • The study on application of biopolyols obtained by cellulose biomass liquefaction performed with crude glycerol for the synthesis of rigid polyurethane foams
    • Paulina Kosmela
    • Aleksander Hejna
    • Krzysztof Formela
    • Józef Haponiuk
    • Łukasz Piszczyk
    2018 Full text JOURNAL OF POLYMERS AND THE ENVIRONMENT

    In this work rigid polyurethane foams (PUR) were obtained by replacement of 0–70 wt% of petrochemical polyol with bio-polyol obtained via cellulose liquefaction in presence of crude glycerol. The foams with different content of a bio-polyol were prepared by single step method for NCO/OH ratio equals 1.5. The prepared materials were analyzed in terms of their morphology, chemical structure, thermal stability and basic physical and mechanical properties. The effects of photo-oxidative and thermo-oxidative aging on chemical structure, apparent density and mechanical properties of the biomass based rigid polyurethane foams were investigated and discussed.

  • The Sustainable Link - the Haze of the Past in the Future
    • Mathilde Landgren
    • Michał Kwasek
    2018

    The aim of the topic is to explore the site by focusing on historical elements and life cycle thinking. The history and sustainability will thereby be the core approach and method during the ongoing design process. These themes will encourage the interdisciplinary and iterative design process.

  • The synthesis and structure of a potential immunosuppressant: N-mycophenoyl malonic acid dimethyl ester
    • Agnieszka Siebert
    • Grzegorz Cholewiński
    • Dorota Garwolińska
    • Adrian Olejnik
    • Janusz Rachoń
    • Jarosław Chojnacki
    2018 Full text JOURNAL OF MOLECULAR STRUCTURE

    The synthesis of a potential immunosuppressant, i.e. dimethyl ester of N-mycophenoyl malonic acid was optimized in the reaction of mycophenolic acid (MPA) with amino malonic dimethyl ester in the presence of propanephosphonic anhydride (T3P) as a coupling reagent. The structural properties of the obtained MPA derivative were investigated by NMR, MS and single crystal X-ray diffraction methods. Theoretical considerations of conformational flexibility based on DFT calculations are presented

  • The Use of an Autoencoder in the Problem of Shepherding
    • Zdzisław Kowalczuk
    • Wojciech Jędruch
    • Karol Szymański
    2018 Full text

    This paper refers to the problem of shepherding clusters of passive agents consisting of a large number of objects by a team of active agents. The problem of shepherding and the difficulties that arise with the increasing number of data describing the location of agents have been described. Several methods for reducing the dimensionality of data are presented. Selected autoencoding method using a Restricted Boltzmann Machine is then discussed. Autoencoding is deployed to reduce the dimensionality of graphic representation of clusters. Reduced data is used to train the neural network which determine movements of the active agents. Genetic algorithms are used in optimization of the parameters of this network.

  • The Use of Big Data in Regenerative Planning
    • Dorota Dominika Kamrowska-Załuska
    • Hanna Obracht-Prondzyńska
    2018 Full text Sustainability

    With the increasing significance of Big Data sources and their reliability for studying current urban development processes, new possibilities have appeared for analyzing the urban planning of contemporary cities. At the same time, the new urban development paradigm related to regenerative sustainability requires a new approach and hence a better understanding of the processes changing cities today, which will allow more efficient solutions to be designed and implemented. It results in the need to search for tools which will allow more advanced analyses while assessing the planning projects supporting regenerative development. Therefore, in this paper, the authors study the role of Big Data retrieved from sensor systems, social media, GPS, institutional data, or customer and transaction records. The study includes an enquiry into how Big Data relates to the ecosystem and to human activities, in supporting the development of regenerative human settlements. The aim of the study is to assess the possibilities created by Big Data-based tools in supporting regenerative design and planning and the role they can play in urban projects. In order to do this, frameworks allowing for the assessment of planning projects were analyzed according to their potential to support a regenerative approach. This has been followed by an analysis of the accessibility and reliability of the data sources. Finally, Big Data-based projects were mapped upon aspects of regenerative planning according to the introduced framework.

  • The use of GIS tools for road infrastructure safety management
    • Marcin Budzyński
    • Wojciech Kustra
    • Romanika Okraszewska
    • Kazimierz Jamroz
    • Jerzy Pyrchla
    2018

    There are many factors that influence accidents and their severity. They can be grouped within the system of man, vehicle and environment. The article focuses on how GIS tools can be used to manage road infrastructure safety. To ensure a better understanding and identification of road factors, GIS tools help with the acquisition of road parameter data. Their other role is helping with a clear and effective presentation of risk ranking. GIS is key to identifying high-risk sections and supports the effective communication of safety levels. This makes it a vital element of safety management. The article describes the use of GIS for the collection and visualisation of road parameter data which are not available in any of the existing databases, i.e. horizontal curve parameters. As we know from research and statistics, they are important factors that determine the safety of road infrastructure. Finally, new research is proposed as well as the possibilities for applying GIS tools for the purposes of road safety inspection.

  • The Use of Gravimetric Measurements to Determine the Orthometric Height of the Benchmark in the Port of Gdynia
    • Krzysztof Pyrchla
    • Jerzy Pyrchla
    2018 Acta Ethnographica Hungarica. An International Journal of Ethnography

    This paper contains a description of the technology used to make gravimetric measurements of the height of a reference point located in the Port of Gdynia, Poland. Measurements were made using a CG-5 gravimeter manufactured by LaCoste & Romberg Scintrex Inc., and determinations of position used a Leica Viva GS15 receiver integrated with a network of HxGN SmartNet GNSS reference stations. The measuring methodology required gravimeter readings to be taken at an absolute measurement station in the Polish official gravimetric network and at new stations. The adopted profile method entailed making a two of measurements at all stations. The measurements relate to terrain with a relatively small height difference between the starting point and end point. It is standard in such cases to assume that gravitation varies linearly with height. This assumption is better satisfied when the gravimetric series is shorter and there is less height variation within it.

  • The use of liquid crystal thermography TLC and particle image velocimetry PIV in selected technical applications
    • Jan Stąsiek
    • Marcin Jewartowski
    2018 Full text Archives of Thermodynamics

    Nowadays, the energy cost is very high and this problem is carried out to seek techniques for improvement of the aerothermal and thermal (heat flow) systems performances in different technical applications. The transient and steady-state techniques with liquid crystals for the surface temperature and heat transfer coefficient or Nusselt number distribution measurements have been developed. The flow pattern produced by transverse vortex generators (ribs) and other fluid obstacles (e.g. turbine blades) was visualized using liquid crystals (Liquid Crystal Thermography) in combination with the true-colour image processing as well as planar beam of double-impulse laser tailored by a cylindrical lens and oil particles (particle image velocimetry or laser anemometry). Experiments using both research tools were performed at Gdańsk University of Technology, Faculty of Mechanical Engineering. Present work provides selected results obtained during this research.

  • The use of plate springs for preloading of a system of tapered roller bearings of a wind turbine gearbox
    • Bartosz Bastian
    • Michał Wasilczuk
    2018 Full text TRIBOLOGIA

    The use of preloaded tapered roller bearings in wind turbine drive systems allows a transfer of load in the case of high variations of axial forces. The examined bearing system, a modification of a current design, consists of a pair of different sized bearings. Previous study showed the high sensitivity of tapered roller bearings on the existing radial interference. Dimensional tolerances used in the original design do not allow obtaining precise values of preload required for slippage-free operation of bearings with varying wind turbine load conditions. With the aim of achieving expected preload values, the use of plate springs (Belleville springs) is proposed. The springs will allow creating an axial force, independently of real dimensions in a modernised unit. Furthermore, it is very important in the case of gearbox retrofits to be executed up in the wind turbine nacelle without dismantling the gearbox.

  • The use of RP-HPLC–Q-TOF–MS as a powerful tool for wastewater composition profiling and selection of water pollution marker specific to wastewater contamination
    • Dagmara Kempińska-Kupczyk
    • Agata Kot-Wasik
    2018 Full text MONATSHEFTE FUR CHEMIE

    Limited drinking water resources and water pollution are one of the main worldwide problems. To reduce the consumption of fresh water resources, the use of treated wastewater has been proposed. The farmlands have been irrigated with wastewater for centuries, but the composition of used sewage has changed over the years. Recent research has revealed the presence of hundreds of new organic contaminants in many environmental waters, including wastewaters and their receivers. For this reason, wastewater profiling and monitoring are of high importance and urgent need. In this study, the HPLC–Q-TOF–MS has been used for the profiling of wastewater composition and evaluation of the water pollution markers belonging to emerging contaminants. Three different solid-phase extraction approaches were applied to obtain the best results. Compounds such as acesulfame-K, caffeine, carbamazepine, cyclamate, ibuprofen, methyl paraben, paracetamol, or saccharin were detected in raw wastewater samples, whereas only acesulfame-K, carbamazepine, and sucralose were found in effluent samples. It seems that these particular compounds might be chosen as water pollution marker specific to Polish communal sewages.

  • The validation process of truss model with joint eccentricities
    • Małgorzata Gordziej-Zagórowska
    • Elżbieta Urbańska-Galewska
    • Łukasz Pyrzowski
    2018

    Nowadays, due to the technological reasons in modern lightweight steel trusses, fabricated from cold-formed sections, positive eccentricities appear in the truss nodes, to induce additional forces truss chords. In order to account for the real load-carrying capacity of truss node area the steel structure research was conducted in scale 1:1. As a result of experimental research, the forms of deformation and strains of the walls of the chord made of the hat section in the area of the analyzed joint was determined. The experimental results from the basis for the numerical model validation was presented in the paper.

  • The σ-phase superconductors Nb20.4Rh5.7Ge3.9 and Nb20.4Rh5.7Si3.9
    • Elizabeth M. Carnicom
    • Tai Kong
    • Tomasz Klimczuk
    • R.j. Cava
    2018 SOLID STATE COMMUNICATIONS

    We show that the previously unreported ternary σ phases Nb20.4Rh5.7Ge3.9 and Nb20.4Rh5.7Si3.9 are both superconductors with Tc values of approximately 1.9 K. The superconducting transitions were characterized through temperature-dependent magnetic susceptibility, electrical resistance, and specific heat measurements. The Sommerfeld constants, γ, for Nb20.4Rh5.7Ge3.9 and Nb20.4Rh5.7Si3.9 are 89(1) mJ mol-f.u.−1K−2 and 86(1) mJ mol-f.u.−1K−2 (about 3.0 and 2.9 mJ mol-atom−1 K−2), respectively. The normalized specific heat jumps at Tc, ΔC/γTc, are approximately 1.39 for Nb20.4Rh5.7Ge3.9 and 1.30 for Nb20.4Rh5.7Si3.9, consistent with both materials being weakly coupled BCS type superconductors.

  • Thematic Areas in the Polish Countryside and Their Role in Local Development
    • Anna Górka
    2018

    The article defines the phenomenon of space thematisation with regards to rural areas in Poland. The typology of thematic spaces and criteria of their comparative description have been proposed. Thematic villages, home gardens, amusement parks and housing estates have been distinguished. They have been compared in terms of spatial availability, the degree of user participation and the commercial vs. non-commercial creation purpose. The indicated factors were considered decisive for the sustainability of the thematic project in public space and thus for the degree of its participation in local development. The conclusions indicate poor use of the potential resulting from the material resources of the rural, cultural heritage in the process of thematisation. This translates into high variability and lability of thematic projects, which means their limited impact on improving the quality of life. The significance of the features of local architecture and native greenery was emphasized as visual differentiators for building a permanent image of the town, the identity of its inhabitants and the rural economy. The conclusion has been based on participatory observation, literature review and internet query.

  • Theoretical Investigation of the Electron-Transfer Dynamics and Photodegradation Pathways in a Hydrogen-Evolving Ruthenium-Palladium Photocatalyst
    • Magdalena Staniszewska
    • Stephan Kupfer
    • Julien Guthmuller
    2018 Full text CHEMISTRY-A EUROPEAN JOURNAL

    Time-dependent density functional theory calcula- tions combinedwith the Marcus theory of electron transfer (ET) were app lied on the molecular photocatalys t [(tbbpy) 2 Ru(tpph z)PdC l 2 ] 2 + in order to elucidate thelight-in- duced relaxation pathways populated upon excitation in the longer wavelength range of its absorption spectrum. The computational resultsshow that after the initial excitation, metal (Ru) to ligand (tpphz)chargetransfer (MLCT) triplet states are energeticallyaccessible, but that an ET towardthe catalytic center(PdCl 2 )from thesestates is aslow process, with estimated time constantsabove 1ns. Instead, the cal- culations predict that low-lying Pd-centered states are effi- ciently populated—assoc iated to an energy transfer toward the catalytic center.Thus,itispostulated that thesestates lead to the dissociation of aCl @ and are consequently re- sponsible for the experimentally observed degradation of the catalytic center.Following dissociation, it is shown that the ET rates from the MLCT states to the charge separated statesare significantly increased (i.e. 10 4 –10 6 timeslarger). This demonstrates that alteration of the catalytic center gen- eratesefficientchargeseparation.

  • Thermal and Chemical Expansion in Proton Ceramic Electrolytes and Compatible Electrodes
    • Andreas Løken
    • Sandrine Ricote
    • Sebastian Lech Wachowski
    2018 Full text Crystals

    This review paper focuses on the phenomenon of thermochemical expansion of two specific categories of conducting ceramics: Proton Conducting Ceramics (PCC) and Mixed Ionic-Electronic Conductors (MIEC). The theory of thermal expansion of ceramics is underlined from microscopic to macroscopic points of view while the chemical expansion is explained based on crystallography and defect chemistry. Modelling methods are used to predict the thermochemical expansion of PCCs and MIECs with two examples: hydration of barium zirconate (BaZr1−xYxO3−δ) and oxidation/reduction of La1−xSrxCo0.2Fe0.8O3−δ. While it is unusual for a review paper, we conducted experiments to evaluate the influence of the heating rate in determining expansion coefficients experimentally. This was motivated by the discrepancy of some values in literature. The conclusions are that the heating rate has little to no effect on the obtained values. Models for the expansion coefficients of a composite material are presented and include the effect of porosity. A set of data comprising thermal and chemical expansion coefficients has been gathered from the literature and presented here divided into two groups: protonic electrolytes and mixed ionic-electronic conductors. Finally, the methods of mitigation of the thermal mismatch problem are discussed

  • Thermal and hydraulic phenomena in boundary layer of minijets impingement on curved surfaces
    • Tomasz Kura
    • Elżbieta Fornalik-Wajs
    • Jan Wajs
    2018 Full text Archives of Thermodynamics

    Presented work considers flow and thermal phenomena occurring during the single minijet impingement on curved surfaces, heated with a constant heat flux, as well as the array of minijets. Numerical analyses, based on the mass, momentum and energy conservation laws, were conducted, regarding single phase and two-phase simulations. Focus was placed on the proper model construction, in which turbulence and boundary layer modeling was crucial. Calculations were done for various inlet parameters. Initial single minijet results served as the basis for the main calculations, which were conducted for two jet arrays, with flat and curved heated surfaces. Such complex geometries came from the cooling systems of electrical devices, and the geometry of cylindrical heat exchanger. The results, regarding Nusselt number, heated surface temperature, turbulence kinetic energy, production of entropy and vorticity, were presented and discussed. For assumed geometrical parameters similar results were obtained.

  • Thermal and physical properties of ZrO2–AlO(OH) nanopowders synthesised by microwave hydrothermal method
    • Iwona Koltsov
    • Marta Prześniak-Welenc
    • Jacek Wojnarowicz
    • Anna Rogowska
    • Jan Mizeracki
    • Maria Malysa
    • Giora Kimmel
    2018 Full text JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY

    Industrially relevant nanopowder was synthesised by microwave hydrothermal synthesis to obtain well-controlled composition (ZrO2–AlO(OH) system) which was found to determine a number of physical and thermal characteristics. This study reports variation of particle size, density, specific surface area (SSABET), as well as thermal behaviour of nanopowder mixtures of ZrO2–AlO(OH) in the whole range of compositions. It was found that the onset temperature (Ton) of physically and chemically bounded water desorption depends on the Al3+/or AlO(OH) content. The lower content of Al3+ in the ZrO2–AlO(OH) system, the higher Ton of physically bound water desorption. There are three distinct temperature regions for water decomposition for nanomaterials investigated in air (at approximately 50, 250 and 450 °C). These temperature ranges depend on particle size and chemical composition of ZrO2–AlO(OH) nanopowders. Materials were divided into three groups characterised by different properties: (1) ZrO2 with 2–12% of Al3+, where particle sizes are from 4 to 8 nm, (2) ZrO2 with 30–67% of AlO(OH), where particle sizes are from 10 to 13 nm, and (3) ZrO2 with 80–99% of AlO(OH), where particle sizes are from 13 to 23 nm. AlO(OH) content determines thermal and physico-chemical properties of synthesised ZrO2–AlO(OH) nanopowders.

  • Thermal boundary conditions to simulate friction layers and coatings at sliding contacts
    • Oleksii Nosko
    2018 Full text INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER

    A brief review of the thermal boundary conditions specified at sliding interfaces was performed. New thermal boundary conditions were derived aimed at solving problems of sliding with account of surface layers representing friction layers and tribological coatings. Based on the assumption of linear temperature distributions in the surface layers, the proposed conditions enable one to simplify simulations by eliminating the surface layers from consideration and merging thermally the bulk bodies. A problem of non-stationary heat conduction in two sliding semispaces with the proposed conditions at their interface was solved analytically. The particular cases of the solution were shown to coincide with the exact temperature expressions obtained for different well-known boundary conditions. The temperature influence of the basic parameters was analysed in dimensionless form on example of a decelerative sliding between a semispace covered with a surface layer and a semispace of constant temperature. An estimation of the error introduced by the proposed conditions was done. It was found that the error is below 1% for a wide class of friction layers and coatings met in practice.