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Gdańsk University of Technology

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Publications from the year 2017

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  • Charge dependence of fragmentation process induced by ion collisions with furan molecule
    • Ewa Erdmann
    • Marta Łabuda
    • Sergio Diaz-Terdero
    • Nestor F. Aguirre
    • Manuel Alcami
    2017 Full text Journal of Physics : Conference Series

    The goal of this work is to describe the system evolution after ion-molecule interaction. We combine different quantum chemistry and statistical mechanics approaches in order to give extended description of the process. Herein we report on a recent study of the fragmentation mechanism of neutral, singly- and doubly-ionized furan molecule in the gas phase.

  • Charge-based deep level transient spectroscopy of B-doped and undoped polycrystalline diamond films
    • Kazimierz Paprocki
    • Kazimierz Fabisiak
    • Robert Bogdanowicz
    • Łukasz Gołuński
    • Elżbieta Staryga
    • Mirosław Szybowicz
    • Magdalena Kowalska
    • Agnieszka Banaszak-Piechowska
    2017 Full text JOURNAL OF MATERIALS SCIENCE

    The undoped and B-doped polycrystalline diamond thin film was synthesized by hot filament chemical vapor deposition and microwave plasma, respectively. The structural characterization was performed by scanning electron microscopy, X-ray diffraction and Raman spectroscopy. The electrical properties of synthesized diamond layer were characterized by dc-conductivity method and charge deep level transient spectroscopy. The B-doped diamond layers show higher sp2 /sp3 ratios in comparison with that of undoped layers what can have an essential influence on the localized density of states associated with shallow hydrogen acceptor states what is reflected in the values of activation energies which reached the values of 38 meV for B-doped and 55 meV for undoped diamond layers, respectively. The existence of deep level traps, as, for example, associated with B-related acceptors, was not observed.

  • Chemical Theory of Machines, basic principles of strength with examples of calculations
    • Michał Ryms
    • Witold Lewandowski
    2017

    This book encompasses the essential range of information on technical aspects of mechanical design. It was written primarily for the students and staff of chemistry faculties of technical universities, yet it may also be utilized by everyone, who ether would like to try or already enjoys designing, but cannot take advantage of typical stress & machine construction handbooks. These handbooks often require familiarity with the concepts of mechanics and higher mathematics, mastery of which is gained after graduating from technical universities. A short study of material strength contained within is limited only to the basic, statically determinable cases and singular loads. Emphasis has been put on explaining various types of stresses and differences in their influences. The amount of formulas has been limited only to the essential minimum, which still allows assessing component dimensions in such a way that these elements are not damaged or excessively deformed, and are durable & stable. Each chapter is preceded by a short theoretical introduction, followed by examples of solved tasks, including: basic equations, symbols, and a description of the solving process. In the final chapter of the book, two examples of technical design problems have been solved. The first one describes stable interaction forces and stresses through a handle, mounting and suspension of any fixed element. The second one presents dynamic effects in the drive shaft of a hypothetical mechanical device (agitator, conveyor, pump, fan, etc.).

  • Chemical-Assisted Mechanical Lapping of Thin Boron-Doped Diamond Films: A Fast Route Toward High Electrochemical Performance for Sensing Devices
    • Jacek Ryl
    • Artur Zieliński
    • Łukasz Burczyk
    • Robert Bogdanowicz
    • Tadeusz Ossowski
    • Kazimierz Darowicki
    2017 Full text ELECTROCHIMICA ACTA

    There is an urgent need for an effective and economically viable increase in electrochemical performance of boron-doped diamond (BDD) electrodes that are used in sensing and electrocatalytic applications. Specifically, one must take into consideration the electrode heterogeneity due to nonhomogenous boron-dopant distribution and the removal of sp2 carbon impurities saturating the electrode, without interference in material integrity. In this work, authors describe a detailed study on electrochemical performance and the enhancement of electrochemical active surface area in the BDD electrodes that have been pretreated via chemical-assisted mechanical lapping. The effect of lapping on both surface chemistry and oxidation processes at the BDD surface was assessed by means of chronovoltammetry, instantaneous impedance monitoring, and X-Ray photoelectron spectroscopy. Next, atomic force microscopy and scanning electron microscopy were employed to produce data on spreading resistance and surface geometry, respectively. While the analyzed interactions are very complex and multi-level, authors suggested that the main observed effect was due to the removal of non-diamond carbon impurities from the electrode surface, decreased grain size, and heterogeneous conductivity. Short-duration pretreatments were found to be an effective route towards more efficient surface activation with negligible alterations in the diamond film structure. A prolonged pretreatment led to a decrease in grain size and lowered contribution of (111) and (110) facets, which in turn influenced the electrode kinetics.

  • Chemiluminogenic acridinium salts: A comparison study. Detection of intermediate entities appearing upon light generation
    • Justyna Czechowska
    • Alicja Kawecka
    • Anna Romanowska
    • Maria Marczak
    • Paweł Wityk
    • Karol Krzymiński
    • Beata Zadykowicz
    2017 Full text JOURNAL OF LUMINESCENCE

    The nine derivatives of acridine-9-carboxylic acid (CMADs) capable for chemiluminescence (CL), representing various classes of compounds were isolated in a chemically pure state (assessed by RP-HPLC) and identified using high resolution mass spectrometry (ESI-QTOF) and magnetic resonance (1H NMR) techniques. Among them are aryl acridinium esters, containing certainly selected and located substituents in both aromatic systems, an acridinium perfluorinated aliphatic ester and an acridinium sulfonamide. The main aim of the study was to compare, under the conditions of their optimal performance, the luminogenic properties of the above molecular systems, such as efficiency and kinetics of emission, limits of detection/quantification as well as stability in aqueous solutions. All of the investigated acridinium salts can serve as CL indicators or fragments of CL labels in modern medical diagnostics (e.g. chemiluminescence and electrochemiluminescence immunoassays (CLIA, ECLIA)), hybridization protection assays of nucleic acids (HPA) as well as other ultra-sensitive luminescence tests. Taking advantage of the flow injection mass analysis, the appearance of unstable cationic intermediates produced upon chemiluminogenic oxidation of selected acridinium salts in an alkaline environment was confirmed for the first time. The observed entities include hydroxyl and hydroperoxide adducts (as radical cations) as well as the acridan spirodioxetanone derivative, making a high energetic and direct precursor of the target emitters, an electronically excited 10-methylacridan-9-ones. The results are supported with quantum chemistry calculations at the DFT level of theory. Theoretical studies have helped to determine the unstable intermediates appearing during in CL in ESI-QTOF experiments. In the group of acridinium ester they allowed to observe the positive linear trend among between the kinetics of CL decay and calculated coefficients of pz LUMO orbitals on the carbon atoms being the reaction centers responsible for generation of light.

  • Chiral and achiral crystals, charge-assisted hydrogen-bond patterns and self-organization of selected solid diaminium thiosulfates
    • Agnieszka Brozdowska
    • Jarosław Chojnacki
    2017 Full text Acta Crystallographica Section B-Structural Science Crystal Engineering and Materials

    Abstract A series of diaminium thiosulfates, derivatives of diamines: NH2CH2CH(CH3)NH2 (1) and NH2(CH2)nNH2, n = 3-6 (2-5 respectively)and thiosulfuric acid were prepared and their structures determined by crystal X-ray diffraction analysis. Compounds 1, 2 and 4 turned out to be hydrates. The crystal structure of 1,2-proylenediaminium thiosulfate is chiral and exhibits spontaneous resolution. Crystals for both enantiomers (1a and 1b) were obtained and examined. An extended network of strong, charge-assisted hydrogen bonding of the (+)N–H∙∙∙O(-) type (also O–H∙∙∙O and O–H∙∙∙S for hydrates) is most likely the main factor defining crystal packing and variable conformation of the cations. Formation of non-centrosymmetric hydrogen bond motifs – distorted cubans – seems to induce the formation of chiral solid state structure from achiral components in the case of 4. Diaminiumthiosulaftes with an odd number of carbon atoms in alkyl chain (compounds 1, 2, 4) form 3D supramolecular networks, while in the case of diaminium salts with an even number of carbon atoms (3 and 5), 2D layers of hydrogen bond domains are observed. The aminium thiosulfates were also characterized by elemental analysis, NMR, and FTIR spectroscopy. Conformations of α,ω-alkyldiaminiumcations in the solid state are discussed and rationalized by DFT calculations.

  • Chirp Rate and Instantaneous Frequency Estimation: Application to Recursive Vertical Synchrosqueezing
    • Dominique Fourer
    • François Auger
    • Krzysztof Czarnecki
    • Sylvain Meignen
    • Patrick Flandrin
    2017 Full text IEEE SIGNAL PROCESSING LETTERS

    This letter introduces new chirp rate and instantaneous frequency estimators designed for frequency-modulated signals. These estimators are first investigated from a deterministic point of view, then compared together in terms of statistical efficiency. They are also used to design new recursive versions of the vertically synchrosqueezed short-time Fourier transform, using a previously published method (D. Fourer, F. Auger, and P. Flandrin, “Recursive versions of the Levenberg-Marquardt reassigned spectrogram and of the synchrosqueezed STFT,” in Proc. IEEE Int. Conf. Acoust., Speech Signal Process., Mar. 2016, pp. 4880-4884). This study paves the way to the real-time computation of a time-frequency representation, which is both invertible and sharply localized in frequency.

  • Chłodzenie materii laserem
    • Jan Godlewski
    2017 Technika Chłodnicza i Klimatyzacyjna

    W artykule pokrótce przedstawione zostały podstawy systemów chłodzących wykorzystujących promieniowanie laserowe w stanie gazowym i w ciele stałym. Realizacja takich systemów chłodzących pozwala na osiąganie temperatur bliskich zera bezwzględnego oraz budowę niewielkich, przenośnych systemów chłodniczych. Urządzenia te bazują na najnowszych osiągnięciach nauki i reprezentują niezwykle wysokie zaawansowanie techniczne oraz technologiczne. Kolejne ich generacje będą podstawą rozwoju nowych urządzeń chłodniczych stosowanych w najnowocześniejszych obszarach nauki i techniki

  • Chromatographic analyses of Lavandula angustifolia and Rosmarinus officinalis extracts and their biological effects in mammalian cells and cell-free systems
    • Eva Horvathova
    • Katarína Kozicsa
    • M Melusowa
    • Eliska Galova
    • A Sevcovicowa
    • Barbara Kusznierewicz
    • Tomasz Chmiel
    • D Slamenova
    2017 NEOPLASMA

    Knowledge of biological properties of natural compounds allows to understand their therapeutic value, efficacy and security. We investigated: composition of Lavandula angustifolia (LA) and Rosmarinus officinalis (RO) extracts, their antioxidant capacity, cytotoxicity and genotoxicity, their DNA-protective potential against DNA damage induced in hamster V79 cells by several genotoxins or in plasmid DNA by Fe2+ ions and activity of antioxidant enzymes in cells treated with these extracts. Higher cytotoxicity, observed at higher concentrations of extracts, was accompanied by the increased level of single-strand (ss) DNA breaks as well as formamidopyrimidine DNA glycosylase (Fpg) sensitive sites. LA and RO extracts were able to protect DNA of hamster cells as well as plasmid DNA against ss DNA breaks induced by genotoxins and Fe2+. LA extract mildly increased the activity of superoxide dismutase (SOD), glutathione peroxidase (GPx) and catalase (CAT), while RO extract decreased the activity of SOD, but increased the activity of CAT and GPx. Cell-free tests confirmed antioxidant activity of both extracts. The biological properties of LA and RO extracts showed that they could have a positive impact on human health.

  • Ciecze głęboko eutektyczne pochodzenia naturalnego jako nowe medium ekstrakcji
    • Katarzyna Owczarek
    • Natalia Jatkowska
    • Justyna Płotka-Wasylka
    • Małgorzata Rutkowska
    • Piotr Konieczka
    • Jacek Namieśnik
    2017 Analityka: Nauka i Praktyka

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  • Ciliated protozoa in the impact zone of the Uzhgorod treatment plant
    • Volodimir Pliashechnyk
    • Yaroslav Danko
    • Grzegorz Łagód
    • Jakub Drewnowski
    • Tatiana Kuzmina
    • Roman Babko
    2017 Full text E3S Web of Conferences

    This paper presents the results of studies on the Uzh River (Ukraine, Zakarpattia Oblast) near the effluent point of a sewage treatment plant in Uzhgorod. The samples were taken at various sites of the treatment plant along the stages of purification process, as well as in the river, at a number of different points above and below the wastewater discharge. At each of these objects, the temperature and O 2 were measured. The structure of ciliate assemblage was analyzed along the stages of the treatment process in the WWTP and in the river before and after the sewage discharge. A total of 26 ciliate taxa were observed and included in the analysis. All the studied stations were considered as a continuum in which populations of protozoa spread freely according to their ecological preferences. The majority of ciliate species were encountered in each of the examined stations, but their quantitative development differed significantly, reflecting their response to the environmental conditions at the stations. The analysis of the qualitative and quantitative distribution of ciliate populations by the stations enabled to group them in respect to the peculiarities of the local conditions. The study showed that the majority of the ciliate species, typical of bioreactors, are equally common at the stations of the Uzh River below wastewater discharges. The ciliate assemblage in the oxygen gradient demonstrated a wide spectrum of ecological tolerance at the species level. These findings confirm that ciliates are very good indicators of the environmental quality, provided that detailed information about their environmental priorities is available

  • City and Urbanity in the Social Discourse
    • Małgorzata Dymnicka
    • Joanna Badach
    2017 Full text IOP Conference Series: Materials Science and Engineering

    The aim of our article is an attempt to present the concept of urbanity that has been shaped throughout centuries along with the development of European civilisation and now entered a new phase of social production of space based on cultural dimensions. The future of the majority of World’s population is connected currently with the urban life with the assumption that qualitative characteristics of life in the 21st century define the quality of civilisation itself. Contrary to many scientists’ predictions of the decline of the city and urbanity, new reviving urban projects, social local activities and everyday urbanism appear which are connected with redefinition of the city as a community. The rebirth of cities, currently referred to as “urban renaissance”, “urban resurgence” or “urban revival”, can be also defined in terms of new urbanity regarded as an insightful and creative attitude towards the city and its culture. The elementary order of things was determined in the last decades not by the space but by the time and its acceleration and simultaneously the role of architecture alters. The course of thinking about the city is changing from a single space-time city towards a personalised city, based on individual identities and corresponding places in the physical and virtual space. That can mean a new role of the city in the creation of urbanity. In the era of advanced communication technologies, a question arises about the ontological status of the city when the emphasis is placed on independence and individuality in interactions between people. Social life becomes detached from traditional spatial patterns and practices. We are interested in the urbanity understood in the wider context of cultural urban studies which are focused on new ways of organising the communication space and social relations. We will refer in this article to the values constitutive for the city and urbanity that guided the idea of the city since the dawn of time as well as its new deconstructed forms (e.g. the pop-up city, neo-bohemia, the creative class, neighbour communities, urban guerrilla gardening, experimental urban farms, etc.).

  • Classifying type of vehicles on the basis of data extracted from audio signal characteristics
    • Karolina Marciniuk
    • Bożena Kostek
    • Andrzej Czyżewski
    2017 Journal of the Acoustical Society of America

    The aim of this study is to find and optimize a feature vector for an automatic recognition of the type of vehicles, extracted form an audio signal. First, the influence of weather-based conditions of road surface on spectral characteristic of the audio signal recorded from a passing vehicle in close proximity to the road is discussed. Next, parameterization of the recorded audio signal is performed. For that purpose, the MIRtoolbox, designed for music parameter extraction, is used to obtain a vector of parameters. Correlation analyses are performed to check whether extracted parameters enable to separate selected types of vehicle-associated noise, e.g.: car, truck and motorcycle. Behrens-Fisher statistics is used to find the most suitable parameters that may be contained in the optimized feature vector. The last step is to build a decision system that allows for the automatic classification of a vehicle type. The results of automatic classification of prepared vehiclenoise related samples are shown and discussed.

  • Clay-filled starch films. Part I: Effect of clay kind and glycerol concentration on functional properties of composites
    • Hanna Staroszczyk
    • Karolina Gottfried
    • Edyta Malinowska-Pańczyk
    • Ilona Kołodziejska
    2017 STARCH-STARKE

    The aim of this work was to improve the mechanical and water barrier properties of composite filmsprepared from starch and clays, plasticized with glycerol at different concentrations. The effects ofhydrophilic Closite Naþand Nanomer PGV were compared with that exerted by organicallymodifiedmorehydrophobicNanofil2 and NanoBent ZR-1. The antimicrobial activity of compositescontaining hydrophobic clays was also investigated. The hydrophilic Nanomer PGV atconcentrations of 5–10%increased the tensile strength (TS) of unplasticized composites, butstarch-Closite Naþcomposites were too brittle to measure their mechanical properties. Thehydrophobic clays did not improve the mechanical properties of the unplasticized composites. Inthe presence of glycerol at concentrations of 20–30%, TS of composites containing hydrophilic claysand even hydrophobic NanoBent ZR-1 increased in comparison to plasticized filmswithout clay.Noneof the claysimproved the waterbarrier propertiesof the unplasticized composites,while in theplasticized composites all the clays decreased the water vapor permeability to an extent dependenton the kind and concentration of clay and glycerol concentration. Starch-NanoBentZR-1 compositeshowed very high activity against gram-positive Staphylococcus aureus and Listeria innocua. Starch-Nanofil2 composites were characterized by smaller activity. Neither composite showed anyantimicrobial activity, or their activity against gram-negative bacteria was low.

  • Client co-production in knowledge-intensive business services (KIBS): Case study analysis
    • Małgorzata Zięba
    • Paweł Kończyński
    2017 Full text

    Purpose: This paper aims to explore the topic of client co-production in knowledge-intensive business services (KIBS). The paper first sketches a theoretical background and reviews previous studies on factors affecting successful client co-production in such companies and then examines these factors via case study research among a small KIBS company and its five customers. Methodology: The paper is based on an in-depth analysis of literature devoted to client co-production in KIBS firms and on the results of case studies analysis. The authors explore theoretically and empirically the perception of factors behind a successful client co-production process of a KIBS company from the point of view of both customers and service provider. The examination resulted in the clarification of what a successful client-KIBS firm cooperation should look like and what kind of actions KIBS firms should undertake to provide it. Findings: As the analysis shows, to perceive client-KIBS firm cooperation as successful, customers desire on hand immediate effects that would justify and compensate their time and money investments (e.g. new clients or brand recognition) and on the other hand, some of them desire positive changes in longer term, which tangible form is associated with the newly obtained knowledge and more importantly, freshly developed and written strategy. Among the factors that influence the co-production process one can list teamwork, trust, communication and knowledge flows. Research limitations: Research results are limited to one KIBS company operating in Poland and its five customers. As such, they are not conclusive for the whole KIBS sector. Research implications: The findings of both literature review and case study analysis indicate that there are several outcomes that are expected from the point of view of a KIBS customer when selecting the service of a KIBS company. The paper examines important aspect of service co-production and provides practical guidelines how cooperation between KIBS firms and their customers should look like. Practical implications: The paper examines the relation between a client and a KIBS company and explores the factors influencing the successful outcome of this relation. The paper provides guidelines how this type of relation should be handled by managers or owners of KIBS firms.

  • Clothes Detection and Classification Using Convolutional Neural Networks
    • Jan Cychnerski
    • Adam Brzeski
    • Adrian Boguszewski
    • Mateusz Marmołowski
    • Marek Trojanowicz
    2017

    In this paper we describe development of a computer vision system for accurate detection and classification of clothes for e-commerce images. We present a set of experiments on well established architectures of convolutional neural networks, including Residual networks, SqueezeNet and Single Shot MultiBox Detector (SSD). The clothes detection network was trained and tested on DeepFashion dataset, which contains box annotations for locations of clothes. Classification task was evaluated on a set of images of dresses that were collected from online shops. Ground truth labels were inferred from shop items metadata for five different attributes, including color, pattern, sleeve, neckline and hemline, each consisting of several possible classes. Automatic gathering of labels resulted in an average of 83\% rate of correct labels. In the experiments we evaluate the impact on classification accuracy of a set of potential improvements, including data augmentation by generating diverse backgrounds, increasing the size of the network and using ensembles. We analyse the accuracy improvements with respect to the processing efficiency. Finally, we present the achieved accuracy rates in the clothes detection task and outline the most successful network configurations for dresses classification.

  • Co ulewa to nas zalewa. Czy nowe prawo wodne nam pomoże?
    • Ziemowit Suligowski
    2017 Magazyn Instalatora

    Zmiana ustawy prawo wodne. Podstawowe zmiany w stosunku do wcześniejszych regulacji. Problem wód opadowych - nowe zadania stawiane samorządom lokalnym.

  • Co zrobić z nieużywaną wieżą ciśnień? Studium historyczno-koncepcyjne (część I)
    • Michał Klugmann
    2017 Technika Chłodnicza i Klimatyzacyjna

    Artykuł przedstawia historię i (dawną) funkcję wieży ciśnień (obecnie nieużytkowanej, stanowiącej konstrukcyjną część budynku Laboratorium Maszynowego Politechniki Gdańskiej. Jest to wstęp do przedstawienia koncepcji adaptacji tego obiektu na modelową mikro-elektrownię szczytowo-pompową, mogącą posłużyć badaniom i dydaktyce.

  • Co zrobić z nieużywaną wieżą ciśnień? Studium historyczno-koncepcyjne (część II)
    • Michał Klugmann
    2017 Technika Chłodnicza i Klimatyzacyjna

    Druga część artykułu przedstawia obliczenia parametrów pracy, jakich można się spodziewać, realizując koncepcję mikro-elektrowni szczytowo-pompowej w oparciu o adaptację nieczynnej wieży ciśnień stanowiącej część budynku Laboratorium Maszynowego. Przedstawiona została także analiza możliwości współpracy z istniejącą instalacją fotowoltaiczną w kierunku uzyskania kompletnego mikro-systemu energetycznego.

  • Cognitive engineering and functional safety technology for reducing risks in hazardous plants
    • Kazimierz Kosmowski
    2017 Journal of Polish Safety and Reliability Association, Summer Safety and Reliability Seminars

    Cognitive engineering is considered nowadays as interesting multidisciplinary domain that focuses on improving the relations between humans and the systems that are supervised and operated. The industrial automation and control systems (IACS) in hazardous plants are increasingly computerized and perform various safety functions. These are designed and implemented according to the functional safety concept. The objective is to maintain high performance / productivity and reduce various risks related to identified hazards and threats. An approach is proposed to apply selected cognitive engineering methods for verifying the design of the functional safety technology implemented in given hazardous plant in context of defined safety functions, operator interfaces, communication means and procedures. The methodology developed might be applied for functional safety management in life cycle of industrial hazardous plants and oil port terminals