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Gdańsk University of Technology

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Publications from the year 2017

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  • Ekspertyza techniczna dotycząca dynamiki mostu MD7 w ciągu S-7 nad rzeką Wisłą
    • Krzysztof Wilde
    • Jacek Chróścielewski
    • Mikołaj Miśkiewicz
    • Łukasz Pyrzowski
    • Aleksandra Kuryłowicz-Cudowska
    2017

    Celem opracowania jest analiza odpowiedzi dynamicznej mostu podwieszonego MD7 w ciągu S-7 nad rzeką Wisłą wraz z estakadami dojazdowymi pod kątem interpretacji wyników pozyskanych z badań pod próbnym obciążeniem dynamicznym, wyników symulacji numerycznych oraz danych pomiarowych z systemu monitoringu technicznego.

  • Ekspertyza w zakresie dostępności kolejowych obiektów obsługi podróżnych z niepełnosprawnościami oraz ograniczoną możliwością poruszania
    • Marek Wysocki
    • Daniel Załuski
    2017

    Ekspertyza dotyczy oceny dostosowania zintegrowanych węzłów przesiadkowych do potrzeb osób z ograniczoną sprawnością, w tym osób z niepełnosprawnościami. Węzły komunikacyjne stanowią ważny element zwiększania niezależności osób z ograniczoną sprawnością i poprzez możliwość skorzystania z różnych środków transportu zwiększa się obszar do którego mogą dotrzeć. W ekspertyzie wskazano, aby wypełnić wymagania wytycznych TSI PRM, a także Konwencji ONZ o prawach osób niepełnosprawnych, należy wprowadzić wymóg, aby zintegrowane węzły przesiadkowe były w pełni dostosowane do potrzeb użytkowników o zróżnicowanych potrzebach w zakresie mobilności i percepcji. Wskazano w ekspertyzie przykłady rozwiązań, które należy uwzględnić przy projektowaniu węzłów komunikacyjnych, ze szczególnym zwróceniem uwagi na obszary o różnej własności (operatorów kolejowych, samorządu lokalnego, terenów prywatnych) i funkcji (obiekty dworca, otoczenia stacji kolejowej i peronów). Zwrócono uwagę na brak szczegółowych standardów, które byłyby zgodne z zasadami projektowania uniwersalnego. Przedstawione w opracowaniu rozwiązania poszczególnych elementów składających się na poprawę dostępności infrastruktury kolejowej w szerszym ujęciu niż to wskazują wytyczne TSI PRM. Przedstawiono warunki jakie powinny spełniać dostosowane ciągi piesze, przystanki komunikacji publicznej, ale również infrastruktura obiektów dworcowych. Dużo miejsca poświęcono informacji, zarówno tej związanej z obsługą pasażerską, ale także informacji usprawniającej poruszanie się osób z ograniczoną percepcją w obszarze węzła przesiadkowego. Opracowanie uszczegóławia wytyczne TSI PRM, w celu wskazania tych rozwiązań, które mają służyć wszystkim użytkownikom w myśl idei projektowania uniwersalnego.

  • EKSPERTYZA WSPÓŁPRACY KOŁO-SZYNA Z WYPADKU KOLEJOWEGO ZAISTNIAŁEGO Z POCIĄGIEM TMEJ NR 764014 W DNIU 07.03.2015 r. O GODZ. 20.30 NA SZLAKU KROTOSZYN – CHOJNICE ORAZ WSKAZANIE PRZYCZYN WYPADKU
    • Zbigniew Kędra
    2017

    Celem opracowania zgodnie z treścią zlecenia było sporządzenie ekspertyzy współpracy koło-szyna z wypadku kolejowego zaistniałego z pociągiem TMEJ Nr 764014 w dniu 07.03.2015 r. o godz. 20.30 na szlaku Krotoszyn – Chojnice, w torze szlakowym nr 1, w km 60,785 linii kolejowej nr 281 Oleśnica – Chojnice oraz wskazanie przyczyn wypadku.

  • Elastic polyurethane foams containing graphene nanoplatelets
    • Łukasz Piszczyk
    • Paulina Kosmela
    • Michał Strankowski
    2017 Full text ADVANCES IN POLYMER TECHNOLOGY

    Elastic polyurethane foams were produced from two-component polyurethane systems (SPECFLEX NE 113 izocyjanian/NR 816 poliol system—SPC and Elastic MBMarket company system POLYOL ET MB 500/ISO ET MB 800—ET) by using a one-step method. The foams were a graphene nanoplatelets (GNP) in the amount ranging from 1 to 2 wt.%. The effect of the nanofiller on polyurethane matrix was determined by analyzing the chemical structure, static and dynamic mechanical properties, and thermal stability of reinforced foams. The application of the carbon nanofiller resulted in increased density and hardness of the obtained composites. The addition of the nanofiller caused a shift in glass transition temperature toward lower temperature values, and an increase in the Young’s modulus, but did not significantly affected the thermal stability of the obtained composites. The research results showed that graphene nanoplatelets nanofiller can be successfully used as a modifier of mechanical and thermal properties in elastic polyurethane foams.

  • Elastic wave propapagation in diagnostics of self-drilling system of grouted anchors
    • Beata Zima
    • Magdalena Rucka
    2017 Full text Diagnostyka

    The paper presents an experimental investigation of elastic wave propagation in a self-drilling hollow bar system, which is commonly used in geotechnical industry as the element of grouted ground anchors and soil nails. The single self-drilling hollow bar and self-drilling system of two bars connected by a coupler were considered. Longitudinal waves were excited at one end of the bar and registered at both ends, by means of PZT plate transducers. Additionally, in the case of connected bars, the transducer was also located at the coupler. The main aim of the study was to analyse the wave attenuation because of discontinuities in the form of mounting connections occurring along the bar length. The differences in wave propagation signals registered at single bar and the system of two bars were indicated and discussed.

  • Electric Field-Driven Assembly of Sulfonated Polystyrene Microspheres
    • Alexander Mikkelsen
    • Jarosław Wojciechowski
    • Michal Rajnak
    • Juraj Kurimský
    • Khobaib Khobaib
    • Ahmet Kertmen
    • Zbigniew Rozynek
    2017 Full text Materials

    A designed assembly of particles at liquid interfaces offers many advantages for development of materials, and can be performed by various means. Electric fields provide a flexible method for structuring particles on drops, utilizing electrohydrodynamic circulation flows, and dielectrophoretic and electrophoretic interactions. In addition to the properties of the applied electric field, the manipulation of particles often depends on the intrinsic properties of the particles to be assembled. Here, we present an easy approach for producing polystyrene microparticles with different electrical properties. These particles are used for investigations into electric field-guided particle assembly in the bulk and on surfaces of oil droplets. By sulfonating polystyrene particles, we produce a set of particles with a range of dielectric constants and electrical conductivities, related to the sulfonation reaction time. The paper presents diverse particle behavior driven by electric fields, including particle assembly at different droplet locations, particle chaining, and the formation of ribbon-like structures with anisotropic properties.

  • Electricity Supplier Switching Process in Poland – a Process Based on the General Distribution Agreement
    • Rafał Łangowski
    2017 Full text Acta Energetica

    Poland, as a Member State of the European Union, is committed to respect the common rules on the electricity market, among other things. One of the most important examples of these regulations is the perception of energy as a commodity subject to competitive market mechanisms. Competitive processes introduced in the national electricity market enable energy consumers, i.a., choice of electricity supplier under the TPA formula. This key right of consumers, embedded in the domestic electricity market for more than nine years, remains controversial and causes a lot of discussion. In this paper market conditions substantially influencing the switch of the electricity supplier in Poland have been presented. The electricity supplier switching process based on the general distribution agreement (GDA) has been discussed in detail. During the presentation, reference was made to all relevant regulations applicable to the issues raised, with particular emphasis on the provisions of the Distribution Grid Code (DGC) and the GDA template.

  • Electrochemical performance of Co3O4/CeO2 electrodes in H2S/H2O atmospheres in a proton-conducting ceramic symmetrical cell with BaZr0.7Ce0.2Y0.1O3 solid electrolyte
    • Tzouliana Kraia
    • Sebastian Lech Wachowski
    • Einar Vollestad
    • Ragnar Strandbakke
    • M Konsolakis
    • Truls Norby
    • G.e. Marnellos
    2017 Full text SOLID STATE IONICS

    The electrochemical performance of Co3O4/CeO2 mixed oxide materials as electrodes, when exposed to H2S/H2O atmospheres, was examined employing a proton conducting symmetrical cell, with BaZr0.7Ce0.2Y0.1O3 (BZCY72) as the solid electrolyte. The impact of temperature (700–850 °C) and H2S concentration (0–1 v/v%) in steam-rich atmospheres (90 v/v% H2O) on the overall cell performance was thoroughly assessed by means of electrochemical impedance spectroscopy (EIS) studies. The performance of the Co3O4/CeO2 electrode was significantly enhanced by increasing the H2S concentration and temperature. The obtained results were interpreted on the basis of EIS results and physicochemical characterization (XRD, SEM) studies of fresh and used electrodes. Notably, it was found that the mass transport processes, mainly associated with the adsorption and diffusion of the intermediate species resulting by the chemical and half-cell reactions taking place during cell operation, dominate the electrode polarization resistance compared with the charge transfer processes. Upon increasing temperature and H2S concentration, the electrode resistance is substantially lowered, due to the in situ activation and morphological modifications of the electrode, induced by its interaction with the reactants (H2S/H2O) and products (H2/SO2) mixtures.

  • Electrochemically Induced Synthesis of Triphenylamine-based Polyhydrazones
    • Przemysław Data
    • Piotr Pander
    • Mieczysław Łapkowski
    • Paweł Zassowski
    • Viktorija Mimaite
    • Krzysztof Karon
    • Juozas Grazulevicius
    • Paweł Ślepski
    • Kazimierz Darowicki
    2017 Full text ELECTROCHIMICA ACTA

    Triphenylamine-based hydrazones were subjected to electropolymerization process that gave well conductive hydrazone based polymers. The first example of polyhydrazone formation during the electrochemical process was shown. The estimation of polymer structure was demonstrated using IR spectroelectrochemistry. The EPR spectroelectrochemistry allowed to explain why in some cases dimer couldn’t be formed. The results of electrochemical, spectroelectrochemical investigation of small molecules, as well as their polymers obtained by electropolymerization, are presented. The comparative study of electropolymerization and doping process by IR, EPR, potentiostatic and potentiodynamic UV-Vis-NIR, DEIS spectroelectrochemical techniques was performed to determine the reaction path, charge carriers and conductivity of polymeric layers.

  • Electrodes consisting of PEDOT modified by Prussian Blue analogues deposited onto titania nanotubes – Their highly improved capacitance
    • Mariusz Szkoda
    • Konrad Trzciński
    • Jakub Rysz
    • Maria Gazda
    • Katarzyna Siuzdak
    • Anna Lisowska-Oleksiak
    2017 SOLID STATE IONICS

    In this work we present the outstanding energy storage of prepared inorganic-organic heterojunction where hydrogenated ordered titania nanotubes (H-TiO2NT) were modified by the hybrid made of poly(3,4-ethylenedioxythiophene) (pEDOT) and iron hexacyanoferrate centres (Fehcf, Prussian Blue). The material TiO2NT/pEDOT:Fechf was obtained electrochemically by means of: anodization, hydrogenation and finally, electropolymerization of EDOT in the presence of Fe(CN)63 −/4 − ions. Inorganic-organic hybrids were characterized using Raman spectroscopy and secondary ion mass spectrometry (SIMS). The morphology of obtained materials was inspected using scanning electron microscopy (SEM). Electrodes were tested using cyclic voltammetry and galvanostatic charge/discharge cycles in an aqueous electrolyte. The characterization of capacitance was studied by means of multiple (up to 10,000) charge/discharge cycles with the current density of 0.45 mA cm− 2. Electrode materials consisting of H-TiO2, pEDOT and Prussian Blue exhibited the highest capacitance of 26 mF cm− 2 even after 10,000 cycles. Thus, the capacitance of TiO2NT/pEDOT:Fehcf was c.a. 15 and 8 times higher than the capacitance registered for pure and hydrogenated TiO2, respectively.

  • Electro-mechanical shear buckling of piezoelectric nanoplate using modified couple stress theory based on simplified first order shear deformation theory
    • Mohammad Malikan
    2017 Full text APPLIED MATHEMATICAL MODELLING

    This paper studies the electro-mechanical shear buckling analysis of piezoelectric nanoplate using modified couple stress theory with various boundary conditions.In order to be taken electric effects into account, an external electric voltage is applied on the piezoelectric nanoplate. The simplified first order shear deformation theory (S-FSDT) has been employed and the governing differential equations have been obtained using Hamilton's principle and nonlinear strains of Von-Karman. The modified couple stress theory has been applied to considering small scale effects. An analytical approach was developing to obtain exact results with various boundary conditions. After all, results have been presented by change in some parameters, such as; aspect ratio, effect of various boundary conditions, electric voltage and length scale parameter influences. At the end, results showed that the effect of external electric voltage on the critical shear load occurring on the piezoelectric nanoplate is insignificant.

  • ELECTRON ATTACHMENT TO HETEROGENEOUS MOLECULAR CLUSTERS
    • Jaroslav Kočišek
    • Jozef Lengyel
    • Kateryna Grygoryeva
    • Andryi Pysanenko
    • Mateusz Zawadzki
    • Juraj Fedor
    • Michal Fárník
    2017

    Heterogeneous clusters are unique model species enabling studies of bulk and surface processes by vacuum restricted methods. This is of particular importance for the reactions of low-energy electrons which have extremely short penetration depth in bulk environments. This contribution overviews our recent experiments with low-energy electrons and clusters prepared by different techniques. First, the deposition of molecules on argon nanoparticles enables the studies of electron induced chemistry of iron pentacarbonyl on the surface. These studies are relevant for the focused electron beam induced deposition - FEBID technique. Second, co-expansion of 2- nitrophenol with water was used to prepare multi-component systems of atmospheric relevance. Finally, using the gas humidification method, we have been able to prepare single micro-hydrated molecules of uracil and its analogues that mimic biological conditions. Specifics of the observed chemistry induced by low-energy electrons will be discussed.

  • Electronic Noses and Electronic Tongues
    • Tomasz Dymerski
    2017 Full text

    Chapter 7 reports the achievements on the field of artificial senses, such as electronic nose and electronic tongue. It examines multivariate data processing methods and demonstrates a promising potential for rapid routine analysis. Main attention is focused on detailed description of sensor used, construction and principle of operation of these systems. A brief review about the progress in the field of artificial senses and future trends in concerned. A special attention has been paid to the application of these systems in two dominant fields, namely in food investigations and environmental monitoring.

  • Electronic noses: Powerful tools in meat quality assessment
    • Wojciech Wojnowski
    • Tomasz Majchrzak
    • Tomasz Dymerski
    • Jacek Gębicki
    • Jacek Namieśnik
    2017 Full text MEAT SCIENCE

    Main factors that are considered by consumers when choosing meat products are colour and aroma, of which the latter is a more reliable indicator of quality. However, a simple sensory evaluation of hedonistic qualities is often not sufficient to determine whether protein is past its shelf life, and consumption of spoiled meat can lead to serious health hazards. Some volatile compounds can be used as spoilage indicators, and so a device equipped with a sensor sensitive to particular odorants would prove useful. Unfortunately, no such single compound has yet been identified, as the changes taking place in a sample of meat during storage are contingent on numerous factors. On the other hand, a combination of volatile compounds may form a unique ‘fingerprint’ which can be analysed pattern recognition algorithms with an electronic nose. It can supplement established techniques of meat quality assessment by providing results that correlate well with hedonic perception in a short time and at a low cost.

  • Electronic structure and time-dependent description of rotational predissociation of LiH
    • Patryk Jasik
    • Józef Eugeniusz Sienkiewicz
    • J. Domsta
    • N. Henriksen
    2017 Full text PHYSICAL CHEMISTRY CHEMICAL PHYSICS

    The adiabatic potential energy curves of the ^1Sigma+ and ^1Pi states of the LiH molecule were calculated. They correlate asymptotically to atomic states, such as 2s + 1s, 2p + 1s, 3s + 1s, 3p + 1s, 3d + 1s, 4s + 1s, 4p + 1s and 4d + 1s. A very good agreement was found between our calculated spectroscopic parameters and the experimental ones. The dynamics of the rotational predissociation process of the 1^1Pi state were studied by solving the time-dependent Schrodinger equation. The classical experiment of Velasco [Can. J. Phys., 1957, 35, 1204] on dissociation in the 1^1Pi state is explained for the first time in detail.

  • Electronically Excited States in Solution via a Smooth Dielectric Model Combined with Equation-of-Motion Coupled Cluster Theory
    • J. Howard
    • James Womack
    • Jacek Dziedzic
    • Chris-Kriton Skylaris
    • Benjamin Pritchard
    • T. Crawford
    2017 Journal of Chemical Theory and Computation

    We present a method for computing excitation energies for molecules in solvent, based on the combination of a minimal parameter implicit solvent model and the equation-of-motion coupled-cluster singles and doubles method (EOM-CCSD). In this method, the solvent medium is represented by a smoothly varying dielectric function, constructed directly from the quantum mechanical electronic density using only two tunable parameters. The solvent-solute electrostatic interactions are computed by numerical solution of the nonhomogeneous Poisson equation and incorporated at the Hartree-Fock stage of the EOM-CCSD calculation by modification of the electrostatic potential. We demonstrate the method by computing excited state transition energies and solvent shifts for several small molecules in water. Results are presented for solvated H 2 O, formaldehyde, acetone and trans-acrolein, which have low-lying n → π* transitions and associated blue shifts in aqueous solution. Comparisons are made with experimental data and other theoretical approaches, including popular implicit solvation models and QM/MM methods. We find that our approach provides surprisingly good agreement with both experiment and the other models, despite its comparative simplicity. This approach only requires modification of the Fock operator and total energy expressions at the Hartree-Fock level—solvation effects enter into the EOM-CCSD calculation only through the Hartree-Fock orbitals. Our model provides a theoretically and computationally simple route for accurate simulations of excited state spectra of molecules in solution, paving the way for studies of larger and more complex molecules.

  • Electrophoretic deposition (EPD) of nanohydroxyapatite - nanosilver coatings on Ti13Zr13Nb alloy
    • Michał Bartmański
    • Bartłomiej Cieślik
    • Joanna Głodowska
    • Pamela Kalka
    • Łukasz Pawłowski
    • Maja Pieper
    • Andrzej Zieliński
    2017 Full text CERAMICS INTERNATIONAL

    Titanium and its alloys are the biomaterials most frequently used in medical engineering, especially as parts of orthopedic and dental implants. The surfaces of titanium and its alloys are usually modified to improve their biocompatibility and bioactivity, for example, in connection with the deposition of hydroxyapatite coatings. The objective of the present research was to elaborate the technology of electrophoretic deposition (EPD) of nanohydroxyapatite (nanoHAp) coatings decorated with silver nanoparticles (nanoAg) and to investigate the mechanical and chemical properties of these coatings as determined by EPD voltage and the presence of nanoAg. The deposition of nanoHAp was carried out at two voltage values, 15 and 30 V. The decoration of nanoHAp coatings with nanoAg was carried out using the EPD process at a voltage value of 60 V and a deposition time of 5 min. The thickness of the undecorated coatings was found to be 2.16 and 5.14 μm for applied EPD voltages of 15- and 30-V, respectively. The release rate of silver nanoparticles into an artificial saliva solution increased with exposure time and EPD voltage. The corrosion current, between 1 and 10 nA/cm2, was significantly higher for undecorated nanoHAp coatings and close to that of the substrate for decorated nanoHAp coatings. The hardness of the undecorated nanoHAp coatings obtained at 15 and 30 V of EPD voltage attained 0.2245 ± 0.036 and 0.0661 ± 0.008 GPa, respectively. Resistance to nanoscratching was higher for thicker coatings. The wettability angle was lower for coatings decorated with nanoAg.

  • Elektrociepłownie- przegląd rozwiązań
    • Natalia Szewczuk-Krypa
    2017

    W artykule przedstawione i opisane zostały rożnego typu układy elektrociepłowni. Systemy zostały sklasyfikowane ze względu na konstrukcję. Przedstawione zostały główne wady i zalety każdego rozwiązań. Artykuł ukazuje również zalety kogeneracji jako sposobu wytwarzania w bardziej efektywny sposób energii elektrycznej oraz cieplnej.

  • Elektroniczne papierosy – (nie)bezpieczne palenie? Cz. 1 Charakterystyka i aspekty zdrowotne
    • Justyna Aszyk
    • Paweł Kubica
    • Jacek Namieśnik
    • Andrzej Wasik
    2017 Analityka: Nauka i Praktyka

    Według danych Światowej Organizacji Zdrowia (WHO) z 2015 roku, papierosy pali aż 1,1 miliarda osób, a palenie tytoniu powoduje rocznie śmierć aż 6 milionów ludzi. Uświadamia to skalę problemu i dowodzi, że pomimo licznych akcji społecznych przeciwko paleniu tytoniu, pozostaje on nadal nierozwiązany. W ostatnich latach ogromną popularność zyskały elektroniczne papierosy jako zdrowsza, tańsza i modniejsza alternatywa w stosunku do papierosów tradycyjnych. W skład elektronicznego papierosa wchodzi pojemnik na płyn, zawierający glikol propylenowy i/lub glicerol, nikotynę oraz liczne substancje nadające smak i zapach oraz system generujący aerozol z płynu zawierającego nikotynę. W przeciwieństwie do papierosów tradycyjnych, podczas użytkowania elektronicznego papierosa nie zachodzi proces spalania tytoniu, dzięki czemu jego użytkownik nie jest narażony na działanie tysięcy substancji smolistych, w tym rakotwórczych. Ze względu na rosnące zainteresowanie tymi produktami, szczególnie wśród młodzieży, konieczne jest prowadzenie kompleksowych badań płynów i aerozolu w celu oceny realnego zagrożenia na jaki narażony jest konsument podczas ich użytkowania.

  • Elektroniczne papierosy –(nie)bezpieczne palenie? Cz.2 Metody oznaczania związków obecnych w płynie i aerozolu
    • Justyna Aszyk
    • Paweł Kubica
    • Jacek Namieśnik
    • Andrzej Wasik
    2017 Analityka: Nauka i Praktyka

    Wzrost zainteresowania nad stosowaniem elektronicznych papierosów wymaga opracowania nowych procedur analitycznych, które pozwolą na prowadzenie kontroli jakości tych wyrobów. Brak jest miarodajnych wyników badań umożliwiających kompleksową analizę składu jakościowego i ilościowego płynu jak i aerozolu. Sytuacja ta budzi wiele obaw, ponieważ niemożliwa jest realna ocena zagrożenia na jakie narażony jest użytkownik elektronicznego papierosa a także przewidzenia ewentualnych skutków długotrwałej ekspozycji na aerozol. Istnieje potrzeba prowadzenia badań w celu dokładnego zidentyfikowania i oznaczenia wszystkich związków chemicznych w płynie i aerozolu a także określenie stopnia ich emisji do aerozolu. W pracy przedstawiono przegląd najczęściej stosowanych metod analizy związków w płynie i aerozolu.