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Gdańsk University of Technology

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Publications from the year 2019

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  • Homo- i heteroleptyczne związki koordynacyjne metali przejściowych z pochodnymi imidazolu, ze szczególnym uwzględnieniem 4(5)-(β-hydroksyetylo)imidazolu – badania strukturalne i spektroskopowe w ciele stałym i roztworze
    • Piotr Maślewski
    2019 Full text

    Rozprawa doktorska porusza zagadnienia związane z syntezą oraz właściwościami związków koordynacyjnych metali przejściowych z pochodnymi imidazolu. Główna uwaga poświęcona jest 4(5)-(β-hydroksyetylo)imidazolowi — występującemu naturalnie ligandowi, będącemu hydroksylowym analogiem histaminy, o zwyczajowej nazwie histaminol. Praca skupia się na ligandach zbliżonych strukturalnie do 4(5)-(β-hydroksyetylo)imidazolu oraz wykazującymi tę samą co on zdolność do chelatacji jonów metali w związkach kompleksowych. W ramach pracy przeprowadzono syntezę trzech ligandów imidazolowych, a następnie wykorzystano je do otrzymania związków kompleksowych z wybranymi jonami metali, przeważnie z tymi które występują w układach biologicznych. Za pomocą rentgenografii strukturalnej uzyskano struktury krystalograficzne dwóch otrzymanych ligandów oraz czternastu nowo poznanych związków koordynacyjnych z 4(5)-(β-metoksyetylo)imidazolem, 4(5)-(β-hydroksyetylo)imidazolem, 2,2’-bis(4,5-dimetyloimidazol)em oraz 1H-imidazolem. Oznaczono stałe trwałości związków koordynacyjnych 4(5)-(β-hydroksyetylo)imidazolu z wybranymi jonami metali w roztworach wodnych oraz prześledzono proces ich tworzenia za pomocą metod potencjometrycznych. Dzięki uzyskanym wynikom udało się scharakteryzować właściwości badanych ligandów oraz tworzonych przez nie kompleksów zarówno w ciele stałym jak i roztworze.

  • Host and pathogen factors in Klebsiella pneumoniae upper urinary tract infections in renal transplant patients
    • Justyna Gołębiewska
    • Beata Krawczyk
    • Magdalena Wysocka
    • Aleksandra Ewiak
    • Jolanta Komarnicka
    • Marek Bronk
    • Bolesław Rutkowski
    • Alicja Dębska-ślizień
    2019 Full text JOURNAL OF MEDICAL MICROBIOLOGY

    Purpose . To analyse the role of virulence factors (VFs) and host in Klebsiella pneumoniae upper urinary tract infections (UTIs) in renal transplant (RTx) recipients. Methodology. Clinical and demographic data were registered prospectively. Phylogenetic background of K. pneumoniae isolates was analysed by PCR melting profiles (MP) and the following VFs genes: fimH-1, uge, kpn, ycfM, mrkD, rmpA, magA, hlyA, cnf-1, irp-1, irp-2, fyuA, entB, iutA, iroN by PCR. Results. We studied urine cultures and clinical data from 61 episodes of K. pneumoniae UTI in 54 RTx recipients. There were 32 cases of AB (53%), 10 cases of lower UTI (16%), 19 cases of AGPN (31%), including six cases of bacteraemia. In total, 74 % of strains were extended-spectrum beta-lactamase+, and there were two carbapenemase-producing strains. PCR MP typing showed a diverse population with 52 different genetic profiles of K. pneumoniae . Analysis of the DNA profiles indicated 45 unrelated, unique genotypes and 7 related (16 isolates from 15 patients) genotypes. Urine flow impairment emerged as an independent predictor of K. pneumoniae upper UTIs (OR 14.28, CI 2.7–75.56, P 0.002), while we did not find any association between the profile of VFs and developing upper UTIs. The prevalence of the uge gene was lower in RTx patients on everolimus when compared to isolates from patients not receiving mTOR inhibitors (33.3 % vs 82.8 % P<0.05). Conclusions . K. pneumoniae upper UTI may be a marker of urine flow impairment. Bacterial VFs could not discriminate between upper and lower UTIs. However, immunosuppression may influence the selection of particular VFs.

  • How green are ionic liquids? – A multicriteria decision analysis approach
    • Marta Bystrzanowska
    • Pena-pereira Francisco
    • Łukasz Marcinkowski
    • Marek Tobiszewski
    2019 Full text ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY

    Due to various desirable physicochemical properties, ionic liquids (ILs) are still gaining in popularity. ILs have been recurrently considered green solvents. However, environmental, health and safety assessments of ILs have raised certain doubts about their benignness, and their greenness status is currently unclear. To clarify the situation on their greenness, we perform a comprehensive assessment of more than 300 commercially available ILs. We apply multicriteria decision analysis, the tool that allows ranking many alternatives according to relevant criteria. They are toxicity towards various organisms, biodegradability, hazard statements and precautionary measures during their handling. We incorporated organic solvents to rankings, as their greenness is better described, so they serve as greenness reference points. The ranking results obtained considering the whole set of criteria show that ILs are placed between recommended polar solvents and problematic/undesirable non polar organic solvents in terms of greenness. However, the exclusion of toxicity data due to unavailability of endpoints results in assessment of ILs as greener than most of organic solvents.

  • How to achieve sustainability?-Employee's point of view on company's culture and CSR practice
    • Wioleta Kucharska
    • Rafał Kowalczyk
    2019 Full text Corporate Social Responsibility and Environmental Management

    The people are the company. This study aims to examine the structure of relationships between company culture, performance, corporate social responsibility (CSR), and reputation, as seen from the employee's perspective, to determine which company culture factors most influence CSR practice and, as a result, sustain a company's development and improve its performance. To accomplish this goal, we conducted a survey among employees of Polish construction companies regarding CSR practices in their organizations. We applied a structural equation model based on 539 individual cases. For a better understanding of the employee's perception of CSR practice, the model included control variables such as company size and position in the company. Our findings suggest that company reputation is a strong mediator of the CSR practice and company performance relationship, and the cultural dimension of long‐term orientation has the greatest influence on CSR practice. The study advances the knowledge on the subject using a microlevel approach to stakeholders' engagement in CSR by exploring the personalized employee‐centric view of organizational culture, CSR practice, and company reputation to sustain a company's development and improve its performance.

  • How to stop salami science: promotion of healthy trends in publishing behavior
    • Jarosław Wawer
    2019 Accountability in Research-Policies and Quality Assurance

    The career of scientists often depends on the number of their published works. This fact leads to the overproduction of low quality papers burying the important articles and making the knowledge less accessible. One of the methods to counteract these negative aspects might lie in the promotion of healthy trends in publishing behavior. In the present work, the theoretical analysis of a new bibliometric measure is presented, and its potential impact on the publishing strategies is carefully discussed.

  • Human Centric Lighting. The New X Factor?
    • Karolina Zielińska-Dąbkowska
    2019 Full text ARC Lighting In Architecture

    We live in challenging times, and one could even claim we’re experiencing a revolution in lighting with LED technology taking over the world. Part of this rapid change involves a concept called Human Centric Lighting (HCL). In Frankfurt this year, during Light+Building, it was the buzzword, with nearly every second manufacturer’s stand claiming they had figured out the special formula necessary to create perfect HCL illumination. But how can such claims be legitimate when we know so little about the full and complex impact of artificial lighting on human biology, let alone how to responsibly apply this new approach?

  • Human Computer Interface for Tracking Eye Movements Improves Assessment and Diagnosis of Patients With Acquired Brain Injuries
    • Michał Lech
    • Michał Tomasz Kucewicz
    • Andrzej Czyżewski
    2019 Full text Frontiers in Neurology

    One of the first clinical signs differentiating the minimally conscious state from the vegetative state is the presence of smooth pursuit eye movements occurring in direct response to moving salient stimuli. Glasgow Coma Scale (GCS) is one of the most commonly used diagnostic tools for acute phase assessment of the level of consciousness, together with a neurological examination. These classic measures are limited to qualitative neurological examination without more quantitative measures provided from e.g., tasks with tracking position of the gaze. Among this and other limitations, it is prone to a relatively high rate of misdiagnosis. Here, we developed an interface for gaze tracking to enhance the assessment of consciousness in 10 patients with acquired brain injuries. According to the acute phase GCS assessment, nine of them were considered unaware and below the minimally conscious state. Chronic neurological examination confirmed six of them below the minimally conscious state. Our new Human Computer Interface (HCI) revealed that six patients were conscious enough to complete at least one of the gaze tracking tasks. Among these six patients, one was originally diagnosed as remaining in a vegetative state and one in coma. The patient diagnosed as remaining in a chronic vegetative state scored six GCS points acutely. Following assessment with our HCI the patient was re-diagnosed with a possible locked-in syndrome. Our HCI method provides a new complementary tool for clinical assessment of patients suffering from disorders of consciousness.

  • Human verbal memory encoding is hierarchically distributed in a continuous processing stream
    • Michał Tomasz Kucewicz
    • Krishnakant Saboo
    • Brent M. Berry
    • Vaclav Kremen
    • Laura R. Miller
    • Fatemeh Khadjevand
    • Cory S. Inman
    • Paul A. Wanda
    • Michael R. Sperling
    • Richard Gorniak
    • Kathryn A. Davis
    • Barbara C. Jobst
    • Bradley Lega
    • Sameer A. Sheth
    • Daniel S. Rizzuto
    • Ravishankar K Iyer
    • Michael J. Kahana
    • Gregory A. Worrell
    2019 Full text eNeuro

    Processing of memory is supported by coordinated activity in a network of sensory, association, and motor brain regions. It remains a major challenge to determine where memory is encoded for later retrieval. Here we used direct intracranial brain recordings from epilepsy patients performing free recall tasks to determine the temporal pattern and anatomical distribution of verbal memory encoding across the entire human cortex. High gamma frequency activity (65-115 Hz) showed consistent power responses during encoding of subsequently recalled and forgotten words on a subset of electrodes localized in 16 distinct cortical areas activated in the tasks. More of the high gamma power during word encoding, and less power before and after the word presentation, was characteristic of successful recall and observed across multiple brain regions. Latencies of the induced power changes and this subsequent memory effect between the recalled and forgotten words followed an anatomical sequence from visual to prefrontal cortical areas. Finally, the magnitude of the memory effect was unexpectedly found to be the largest in selected brain regions both at the top and at the bottom of the processing stream. These included the language processing areas of the prefrontal cortex and the downstream visual areas at the junction of the occipital and temporal lobes. Our results provide evidence for distributed encoding of verbal memory organized along a hierarchical posterior-to-anterior processing stream.

  • Hybrid Finite Element Method Development for Offshore Structures’ Calculation with the Implementation of Industry Standards
    • Jacek Łubiński
    • Henryk Olszewski
    2019 Full text Polish Maritime Research

    In the design process of offshore steel structures, it is typical to employ commercial calculation codes in which simulation and evaluation of results are performed on the basis of the available standards (e.g. API, DNV, Lloyds). The modeling and solution rely on finite element methods and cover the simulation of the structure’s properties along with the influence of the marine environment – sea currents, wave and wind loading, as well as the influence of vibrations, buoyancy and accompanying mass of water. Both commercial and open source mathematical modeling software which is available nowadays allows for cost effective and flexible implementation of advanced models for offshore industrial structures with high level of credibility and safety. The models can be built to suit task-specific requirements and evaluated on the basis of the selected criterial system best suited to the needs of the customer. Examples of methodology for environmental and structural model development are presented, along with simulation results covering a wide scope of data, ranging from stress and deformation to resonant characteristics and issues of technological feasibility

  • Hybrid System for a Person Tracking in Harsh Indoor Environments
    • Piotr Rajchowski
    • Krzysztof Cwalina
    • Jarosław Sadowski
    • Jacek Stefański
    2019

    In the article, the prototype of a system for a person tracking in a harsh indoor environment, especially when no other commercially available radiolocalization system can be used, was briefly described. The prototype realizes the data fusion, i.e. combines data from inertial and environmental sensors and radio distance measurements to estimate the position of a moving person. It is worth noting that the concept and practical realization of the system was consulted with Maritime Regional Unit of Polish Border Guard.

  • Hydraulic analysis of causes of washout of Gdynia-Orłowo seashore during the flood in the Kacza river estuary
    • Michał Szydłowski
    2019 Full text Polish Maritime Research

    In July 2016 in the Three-city agglomeration a rainfall episode of over a day duration and 150 mm summary rainfall height, occurred. This situation, extreme as for Polish conditions, caused significant freshets in rivers and streams running into Gdansk Bay, the Baltic Sea, and serving as collectors of rainfall waters for the sea-coast towns. In many areas of the Three-city flood phenomena and overflows took place. The flood also occurred in the catchment area of the Kacza river in Gdynia. The passing of flood water rise caused damage of many infrastructure objects located along the river valley. The estuary section of the river suffered most, especially sea-shore belt together with beach around the estuary which were significantly washed out. In this paper an approach was made to answer to the question on direct causes of the situation which occurred at the estuary of the Kacza river. To this end, there was worked out a hydrodynamic model of the considered section of the river, based on the solving of two-dimensional differential motion equations of free-surface liquid, and simulations of water flow propagation along the river’s valley were performed for a few variants of hydraulic engineering infrastructure of river bed. Numerical hydraulic analysis made it possible to determine a role of the hydraulic engineering objects in forming the flood water rise as well as their impact on location and range of washout zones of sea-shore belt.

  • Hydraulic resistance analyses of selected elements of the prototype Stirling engine
    • Mariusz Furmanek
    • Jacek Kropiwnicki
    2019 Full text Archives of Thermodynamics

    The paper presents the results of simulation tests of hydraulic resistance and temperature distribution of the prototype Stirling alpha engine supplied with waste heat. The following elements were analyzed: heater, regenerator and cooler. The engine uses compressed air as a working gas. Analyses were carried out for three working pressure values and different engine speeds. The work was carried out in order to optimize the configuration of the engine due to the minimization of hydraulic resistance, while maintaining the required thermal capacity of the device. Preliminary tests carried out on the real object allowed to determine boundary and initial conditions for simulation purposes. The simulation assumes that there is no heat exchange between the regenerator and the environment. The solid model used in simulation tests includes the following elements: supply channel, heater, regenerator, cooler, discharge channel. Due to the symmetrical structure of the analyzed elements, simulation tests were carried out using 1/6 of the volume of the system.

  • Hydro Power Plant in the Process of Voltage Control in the Electric Power System and the System Restoration
    • Zbigniew Lubośny
    • Maciej Łosiński
    2019 Full text Acta Energetica

    The article covers selected issues related to the share of hydroelectric power in the process of rebuilding the power system after black-out and voltage control during that process. Selected results of measurements made during the creation of the transmission chain for the need to start a block of a thermal power plant from a hydroelectric power plant were presented.

  • Hydromechaniczne aspekty projektowania statków z napędem azymutalnym
    • Maciej Reichel
    2019

    W monografii przedstawiono ocenę stanu dotychczasowej wiedzy dotyczącej hydromechanicznych aspektów projektowania statków z pędnikami azymutalnymi, dostępnej w światowym otwartym obiegu wiedzy. Praca prezentuje proces projektowania, w tym optymalizacji kształtu kadłuba statku z napędem azymutalnym. Omówiono wpływ zmian kształtu kadłuba na właściwości manewrowe statków z takim typem napędu, ze szczególnym uwzględnieniem stateczności kursowej. Głównym jednak elementem pracy są te etapy spirali projektowej, które wprost są związane z zagadnieniami hydromechaniki. Monografia zawiera opis procesu optymalizacji właściwości napędowych i manewrowych statków z pędnikami azymutalnymi wraz z szerokim opisem prób modelowych służących optymalizacji. Osobny rozdział poświęcono charakterystykom hydrodynamicznym pędników azymutalnych w warunkach wody otwartej. Zwrócono uwagę na odmienne znaczenie sił napędowych i sił sterujących generowanych na pędnikach azymutalnych w procesie projektowania. Monografia zawiera najnowsze informacje dotyczące projektowania statków oraz pędników azymutalnych, dostępne w światowej literaturze. Uwzględnia ona zarówno prace badawcze wykonywane przez międzynarodowe środowisko hydromechaników, jak i prace autora realizowane przez wiele lat w polskich i zagranicznych ośrodkach naukowych. W podsumowaniu monografii zaprezentowano krytyczną ocenę procedur badania i projektowania statków z pędnikami azymutalnymi oraz przyszłe tematy badawcze, które według autora powinny zostać podjęte w najbliższym czasie w celu podniesienia jakości procesu projektowania.

  • Hydrothermal synthesis of vanadium ammonium compounds – the crucial role of the pressure
    • Małgorzata Nadolska
    • Marta Prześniak-Welenc
    • Andrzej Nowak
    • Kamila Sadowska
    2019

    Due to the structural diversity and chemical activity, vanadium oxides and their derivatives are continuingly in the great interest of scientist. In a large family of vanadium compounds, one of the most interesting are ammonium vanadates (with the general formula (NH4)xVyOz). They have received much attention because of their promising application as cathode material in mono- and multivalent-ion batteries [1]. Hydrothermal synthesis is already established as an efficient method to produce ammonium vanadates with various morphology, structure and chemical composition. The aforementioned parameters determined the electrochemical properties of the material and could be tailored by varying synthesis parameters (e.g. temperature, time, pH) [2]. In presented work, the effect of the initial hydrothermal synthesis pressure on the final product was studied for the first time. All samples were prepared via hydrothermal method in the autoclave, in which the water solution of NH4VO3 and C2H2O4 was heated to 180°C for 8h. In order to study the pressure effect, the same procedure was repeated without the initial pressure and with pre-pressurized the autoclave to 5, 25, 50 bars. The obtained samples were fully characterized with SEM, TEM, XRD, XPS, FTIR and TGA. Results indicate that the initial pressure affects both the morphology and the structure of samples and cannot be neglected in the synthesis. Moreover, the electrochemical performance of the as-prepared samples as lithium-ion cathode materials were investigated. It was found that sample obtained with higher pressure exhibit higher specific capacity and cyclic stability. FIGURE 1. Comparison of ammonium vanadates obtained with different initial hydrothermal synthesis pressure. Acknowledgements Part of this work was supported by the National Science Centre (No. 2017/01/X/ST5/01415). References [1] Y. Liu et al.J., Mater. Sci., 53(3),pp. 2045–2053, 2018 [2] S. Sarkar et al., Electrochim. Acta, vol. 132, pp. 448–456, 2014.

  • Hyperbolic heat conduction at a microscopic sliding contact with account of adhesion-deformational heat generation and wear
    • Oleksii Nosko
    2019 Full text INTERNATIONAL JOURNAL OF THERMAL SCIENCES

    Different non-Fourier models were proposed to simulate temperatures in materials subjected to extremely fast thermal disturbances, when the speed of heat propagation should be concerned. The present study investigated temperature and heat balance at a microscopic sliding contact during a single frictional interaction based on the Cattaneo-Vernotte hyperbolic heat conduction equation. Two fundamental features of friction, namely, adhesion-deformational heat generation and wear, were taken into account. By applying the Laplace transform approach, non-stationary temperature expressions were derived for the hyperbolic and classical parabolic heat conduction equations. Parametric analysis was then done for parameter ranges typical of brake materials. It was found that the hyperbolic heat conduction generally results in a higher temperature at the sliding surface compared to the parabolic heat conduction. The influence of the heat propagation speed can be significant for thermal relaxation time of the order above microsecond. It becomes stronger with an increase in the contribution of the adhesive heat generation. Another finding obtained is that a considerable fraction of heat is removed from the contact zone along with wear debris, resulting in a lower temperature. This fraction is larger for the hyperbolic heat conduction.

  • ICT-driven economic and financial development. Analyses of European countries
    • Ewa Lechman
    • Adam Marszk
    2019

    ICT-Driven Economic and Financial Development: Analyses of European Countries demonstrates the effects of ICT diffusion on economic, social and financial development by examining their impact on the structure and dynamics of national economies. It provides the insight into shifts observed in labour markets, international trade activities productivity factors, education and use of innovative financial products. It combines empirical analyses and data sources stretching back to 1990 make it an important contribution to understanding the effects of ICT diffusion on economic and financial development. The book answers questions such as how will national and regional economies react to upcoming ICT developments and growing usage, and what is the magnitude of impact of new information and communication technologies on various aspects of social and economic life.

  • Identification, Assessment and Automated Classification of Requirements Engineering Techniques
    • Aleksander Jarzębowicz
    • Kacper Sztramski
    2019 Full text

    Selection of suitable techniques to be used in requirements engineering or business analysis activities is not easy, especially considering the large number of new proposals that emerged in recent years. This paper provides a summary of techniques recommended by major sources recognized by the industry. A universal attribute structure for the description of techniques is proposed and used to describe 33 techniques most frequently quoted by reviewed sources. A pilot study of automated classification of techniques based on attribute values is also reported. The study used fuzzy c-means clustering algorithm and produced pairings of complementary techniques, most of which successfully passed validation conducted by business analysis practitioners.

  • Identification of damages in the inlet air duct of a diesel engine based on exhaust gas temperature measurements
    • Patrycja Puzdrowska
    2019 Full text Combustion Engines

    The temperature of the exhaust gas of a diesel piston engine, measured in the characteristic control sections of its thermo-flow system, can be a valuable source of diagnostic information about the technical condition of the elements limiting the working spaces thus separated, including the turbocharging system, but also its fuel supply system and replacement of the medium. In standard marine engine measurement systems equipped with an impulse turbocharging system, the exhaust gas temperature is measured at the outlet of individual cylinders and before and after the turbocharger turbine, using traditional thermocouples with high measurement inertia (time constant of tenths of a second and more). This means that for further diagnostic analyses, the average value of the periodically changing temperature of the exhaust stream leaving individual engine cylinders, the exhaust stream in the collective duct feeding the turbine and the exhaust stream in the exhaust duct of the turbine is used. This article proposes a new approach to the issue of diagnostic informationiveness of the exhaust gas temperature of a diesel engine, extending its observations with the dynamics of changes in the duration of one working cycle. The aim of the tests carried out on the laboratory stand of Farymann Diesel engine type D10 was to determine the diagnostic relations between the loss of permeability of the inlet air channel filter baffle and selected standards of the quick-changing signal of the exhaust gas temperature. On the basis of the calculations carried out, the following dynamic features of the recorded signal were determined: maximum amplitude of instantaneous exhaust gas temperature values (peak-to-peak value), its rate of increase and decrease, and the specific enthalpy of exhaust gases within one engine work cycle. Comparative analysis of numerical data characterizing the recorded quick-changing exhaust gas temperature courses clearly indicates obvious thermodynamic and energy consequences of partial loss of flow capacity of the air channel supplying the combustion chamber of the test engine. A further development of the experimental test programme is foreseen in order to determine a diagnostic matrix to support the diagnostic inference about the technical condition of the diesel engine on the basis of measurements and analysis of the quick-changing exhaust gas temperature.

  • Identification of evolutionary conserved DNA sequence and corresponding S21 ribosomal protein region for diagnostic purposes of all Borrelia spirochetes
    • Roman Kotłowski
    • Lucyna Holec-Gąsior
    2019 Full text Acta Biochimica Polonica

    It is still under investigation, whether all Borrelia sp. causing Lyme borreliosis and other diseases are already identified and properly classified as human pathogens. For this reason, it is of great importance to develop a diagnostic ELISA test that detects all Borrelia sp. The aim of this study was to identify conserved DNA and protein regions present in all currently known Borrelia sp. In experimental studies 31 available Borrelia sp. genomes were aligned and screened for the presence of evolutionary conserved regions. As a result of bioinformatics analysis, one evolutionally conserved DNA region encoding a core fragment of the S21 ribosomal protein was identified. Both a couple of genus-specific PCR primers and the S21 protein B-cell epitope were designed for prospective diagnostic purposes.