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Publications Repository
Gdańsk University of Technology

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Publications from the year 2015

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  • Reactivity of Phosphanylphosphinidene Complex of Tungsten(VI) toward Phosphines: A New Method of Synthesis of catena-Polyphosphorus Ligands
    • Rafał Grubba
    • Anna Ordyszewska
    • Kinga Kaniewska
    • Łukasz Ponikiewski
    • Jarosław Chojnacki
    • Dietrich Gudat
    • Jerzy Pikies
    2015 INORGANIC CHEMISTRY

    The reactivity of an anionic phosphanylphosphinidene complex of tungsten(VI), [(2,6-i-Pr2C6H3N)2(Cl)- W(η2-t-Bu2P=P)]Li·3DME toward PMe3, halogenophosphines, and iodine was investigated. Reaction of the starting complex with Me3P led to formation of a new neutral phosphanylphosphinidene complex, [( 2,6-i-Pr2C6H3N)2(Me3P)W(η2-t-Bu2P=P)]. Reactions with halogenophosphines yielded new catena-phosphorus complexes. From reaction with Ph2PCl and Ph2PBr, a complex with an anionic triphosphorus ligand t-Bu2P−P(−)−PPh2 was isolated. The main product of reaction with PhPCl2 was a tungsten(VI) complex with a pentaphosphorus ligand, t-Bu2P−P(−)−P(Ph)−P(−)−P-t-Bu2. Iodine reacted with the starting complex as an electrophile under splitting of the P−P bond in the t-Bu2PP unit to yield [(1,2-η-t-Bu2P−P−P-t-Bu2)W(2,6-i-Pr2C6H3N)2Cl], t-Bu2PI, and phosphorus polymers. The molecular structures of the isolated products in the solid state and in solution were established by single crystal X-ray diffraction and NMR spectroscopy.

  • Realizacja sieci wodociągowych i kanalizacyjnych
    • Ziemowit Suligowski
    2015 Full text Inżynieria Morska i Geotechnika

    Podstawowe problemy związane z realizacją sieci wodociągowych i kanalizacyjnych. Najczęstsze błędy procesu inwestycyjnego. Problem konsekwencji błędnych ocen w zakresie warunków posadowienia. Złe posadowienie jako główna przyczyna niemal wszystkich awarii.

  • REALIZACJE SPRZĘTOWO-PROGRAMOWE SYMULATORÓW PODSTAWOWYCH ZASAD PRZEBIEGU PROCESÓW REAKTORA JĄDROWEGO
    • Tomasz Karla
    • Jarosław Tarnawski
    • Kazimierz Duzinkiewicz
    2015 Full text Acta Energetica

    W artykule przedstawiono możliwości i proces budowy symulatorów podstawowych zasad działania procesów reaktora jądrowego. Proces budowy i badania oparte są na modelach punktowych: kinetyki neutronów, procesów generacji i wymiany ciepła oraz procesów zatruwania i wypalania paliwa. Badano możliwości realizacji symulatorów, wykorzystując różne środowiska programowe i platformy sprzętowe. Referencyjny symulator został opracowany w środowisku MATLAB/Simulink bez uwzględnienia wymagań pracy w czasie rzeczywistym. Na jego podstawie zbudowano w środowisku xPC drugi symulator procesów reaktora, pracujący w czasie rzeczywistym przy spełnieniu twardych wymagań czasowych. Następnie dokonano dekompozycji funkcjonalnej reaktora jądrowego i wydzielono procesy o różnych skalach czasowych, a ich symulacje zostały wraz z mechanizmem synchronizacji zaimplementowane w kilku jednostkach Raspberry PI, uzyskując rozproszoną wersję symulatora. Przeprowadzono weryfikację poprawności działania symulatorów oraz opracowano interfejsy użytkownika i instrukcje obsługi. W artykule jest również rozpatrywany sieciowy symulator obsługiwany z poziomu przeglądarki internetowej. Dokonano porównania funkcjonalności, ograniczeń i potencjalnych zastosowań poszczególnych symulatorów.

  • REALIZACJE SPRZĘTOWO-PROGRAMOWE SYMULATORÓW PODSTAWOWYCH ZASAD PRZEBIEGU PROCESÓW REAKTORA JĄDROWEGO
    • Tomasz Karla
    • Jarosław Tarnawski
    • Kazimierz Duzinkiewicz
    2015 Full text Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej

    Przedstawiono możliwości i proces budowy symulatorów podstawowych zasad działania procesów reaktora jądrowego w oparciu o modele punktowe: kinetyki neutronów, procesów generacji i wymiany ciepła oraz procesów zatruwania i wypalania paliwa. Referencyjny symulator został opracowany w środowisku MATLAB/Simulink. Na jego podstawie zbudowano w środowisku xPC drugi symulator pracujący w czasie rzeczywistym. Po dekompozycji funkcjonalnej reaktora jądrowego wydzielono procesy o różnych skalach czasowych i zaimplementowano wraz z mechanizmem synchronizacji w jednostkach Raspberry PI uzyskując rozproszoną wersję symulatora. W artykule rozpatrywany jest również sieciowy symulator obsługiwany z poziomu przeglądarki internetowej. Przeprowadzono weryfikację poprawności działania symulatorów. Dokonano porównania funkcjonalności i możliwych zastosowań symulatorów.

  • Real-Time connection Between Immerse 3D Vizualization Laboratory and Kaskada Platform
    • Łukasz Wiszniewski
    • Tomasz Ziółkowski
    2015 Full text TASK Quarterly

    Multimedia stream processing into two cooperative different systems (cluster platform and virtual lab) is considered. The considered selected information about the systems is presented and the idea of its communication when executing the distributed application is proposed. A general schema of the communication architecture is given. Tests of data transmission quality are considered and their results are presented.

  • Real-time PCR approach in dermatophyte detection and Trichophyton rubrum identification
    • Natalia Kobylak
    • Barbara Bykowska
    • Roman Nowicki
    • Anna Brillowska-Dąbrowska
    2015 Full text Acta Biochimica Polonica

    Dermatophytes are keratinophilic molds that infect human hair, nails and skin. Diagnosis of dermatophytosis is based on morphological, serological and biochemical features. However, identification is difficult and laborious due to similarities between microorganisms. Thus, there is considerable interest to develop mycological diagnostic procedures based on molecular biology methods. In this study, fast, two-step DNA extraction method and real-time PCR was used for detection of dermatophytes DNA using pan-dermatophyte primers and identification of Trichophyton rubrum from pure cultures. The applied method allowed correct detection of all dermatophytes and correct identification of Trichophyton rubrum in less than 2 hours.

  • Receiver of Doppler multistatic system for moving target detection and tracking
    • Zawisza Ostrowski
    2015 Full text HYDROACOUSTICS

    The article presents a method for solving major structural problems that occur in the receiver used in the multistatic Doppler system, aimed at determination of the trajectory and velocity of a moving target. In the system two transmitters emit acoustic continuous sinusoidal waves at different frequencies. The signals, scattered from a moving target are received by four hydrophones. Beside of the echoes, much larger signals coming directly from transmitters are recorded. It has been proved that in the presence of the direct high-amplitude signal, using currently available A/D converters, there is no possibility to detect the Doppler shift of small signals. The proposed approach is based on the homodyne frequency conversion of the received signals. Subsequently, the constant component and other unwanted products of the frequency conversion are filtered. The results of computer simulation have shown the effectiveness of the adopted design solution.

  • Receiver-side fingerprinting method for color images based on a series of quaternion rotations
    • Bartosz Czaplewski
    • Roman Rykaczewski
    2015 Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

    The proposed method is a new Joint Fingerprinting and Decryption (JFD) method that uses a cipher based on quaternion rotation to encrypt color images that are then sent to all users via multicast transmission. Individual encryption keys depend on the users’ fingerprints, so that a unique fingerprint is introduced into the image during decryption for each decryption key. A simulation-based research was conducted to examine the method’s robustness against collusion attacks.

  • RECENT ADVANCES IN GRAPHENE APPLICATION FOR ELECTRONIC SENSING
    • Maciej Łuszczek
    • Dariusz Świsulski
    2015 Full text Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej

    The great interest in graphene is caused by its potential for constructing various sensors exhibiting excellent parameters. The high carrier mobility and the unique band structure of graphene makes it promising especially in the field-effect transistors (GFET) applications. In this article, recent advances of the selected graphene-based sensor applications were presented and the possible directions for further investigations were pointed out.

  • Recent Developments in the Synthesis of Unsymmetrical Disulfanes (Disulfides). A Review
    • Mateusz Musiejuk
    • Dariusz Witt
    2015 ORGANIC PREPARATIONS AND PROCEDURES INTERNATIONAL

    The synthesis of unsymmetrical disulfanes is an important transformation in organic synthesis and medicinal chemistry. The current review is intended to summarize achievements in the synthesis of unsymmetrical disulfanes over the last decade (2004–2014).

  • Recenzja artykułu Joanny Kucharzewskiej o artykule "Siedziba Urzędu Marszałkowskiego na placu Teatralnym w Toruniu - tradycja miejsca i historia budowy
    • Maria Sołtysik
    2015

    Recenzja wskazuje konieczne poprawki jakie autorka artykułu musi poczynić przed jego przekazaniem do druku

  • Recognition of hazardous acoustic events employing parallel processing on a supercomputing cluster . Rozpoznawanie niebezpiecznych zdarzeń dźwiękowych z wykorzystaniem równoległego przetwarzania na klastrze superkomputerowym
    • Kuba Łopatka
    • Andrzej Czyżewski
    2015

    A method for automatic recognition of hazardous acoustic events operating on a super computing cluster is introduced. The methods employed for detecting and classifying the acoustic events are outlined. The evaluation of the recognition engine is provided: both on the training set and using real-life signals. The algorithms yield sufficient performance in practical conditions to be employed in security surveillance systems. The specialized framework for parallel processing of multimedia data streams KASKADA, in which the methods are implemented, is briefly introduced. An experiment intended to assess outcomes of parallel processing of audio data on a supercomputing cluster is featured. It is shown that by employing supercomputing services the time needed to analyze the data is greatly reduced.

  • Recognizing emotions on the basis of keystroke dynamics
    • Agata Kołakowska
    2015

    The article describes a research on recognizing emotional states on the basis of keystroke dynamics. An overview of various studies and applications of emotion recognition based on data coming from keyboard is presented. Then, the idea of an experiment is presented, i.e. the way of collecting and labeling training data, extracting features and finally training classifiers. Different classification approaches are proposed to be tested: universal vs. individual models, multiclass vs. two-class. The obtained results reveal which of these approaches are appropriate for the given task. The individual two-class models turn out to be the most accurate.

  • Reconstruction Methods for 3D Underwater Objects Using Point Cloud Data
    • Marek Kulawiak
    • Zbigniew Łubniewski
    2015 Full text HYDROACOUSTICS

    Existing methods for visualizing underwater objects in three dimensions are usually based on displaying the imaged objects either as unorganised point sets or in the form of edges connecting the points in a trivial way. To allow the researcher to recognise more details and characteristic features of an investigated object, the visualization quality may be improved by transforming the unordered point clouds into higher order structures. There are many algorithms for constructing meshes from point clouds, some of which are more suited to processing data obtained from particular sources. This article presents the application of several methods for generating 3D models from point clouds for the purpose of reconstructing underwater objects, such as shipwrecks. The article presents the results obtained with each method and discusses possible ways of improving the quality of produced meshes.

  • Recuperator with microjet technology as a proposal for heat recovery from low-temperature sources
    • Jan Wajs
    • Dariusz Mikielewicz
    • Elżbieta Fornalik-Wajs
    • Michał Bajor
    2015

    A tendency to increase the importance of so called dispersed generation, based on the local energy sources and the working systems utilizing both the fossil fuels and the renewable energy resources is observed nowadays. Generation of electricity on industrial or domestic scale together with production of heat can be obtained for example through employment of the ORC systems. It is mentioned in the EU directive 2012/27/EU for cogenerative production of heat and electricity. For such systems the crucial points are connected with the heat exchangers, which should be small in size but be able to transfer high heat fluxes. In presented paper the prototype microjet heat exchanger (MJHE) dedicated for ORC systems is introduced. It was assembled at Faculty of Mechanical Engineering – Gdansk University of Technology, Poland. Its novel construction is described together with the systematical experimental analysis of heat transfer and flow characteristics. Reported results showed high values of the overall heat transfer coefficient and slight increase in the pressure drop. Despite increase in the flow resistance, the results are promising, because the heat transfer gain overcame the pressure loss. The results of microjet heat exchanger were compared with the results of commercially available compact plate heat exchanger (PHE).

  • Recuperator with microjet technology as a proposal for heat recovery from low-temperature sources
    • Jan Wajs
    • Dariusz Mikielewicz
    • Elżbieta Fornalik-Wajs
    • Michał Bajor
    2015 Full text Archives of Thermodynamics

    A tendency to increase the importance of so called dispersed generation, based on the local energy sources and the working systems uti- lizing both the fossil fuels and the renewable energy resources is observed nowadays. Generation of electricity on industrial or domestic scale together with production of heat can be obtained for example through employment of the ORC systems. It is mentioned in the EU directive 2012/27/EU for cogenerative production of heat and electricity. For such systems the crucial points are connected with the heat exchangers, which should be small in size but be able to transfer high heat fluxes. In presented paper the prototype microjet heat exchanger (MJHE) dedicated for heat recovery systems is in- troduced. Its novel construction is described together with the systematical experimental analysis of heat transfer and flow characteristics. Reported results showed high values of the overall heat transfer coeffcient and slight increase in the pressure drop. The results of microjet heat exchanger were compared with the results of commercially available compact plate heat exchanger (PHE).

  • Redefiniowanie przestrzeni medycznej = Redefining healthcare space
    • Anna Awtuch
    2015

    Szpital jest obiektem publicznym, budynkiem-miastem, jego architektura nakierowana jest na realizację procesu leczenia i zdrowienia, a jednocześnie formuje przestrzenne ramy mikrokosmosu interakcji społecznych rozgrywających się pomiędzy pacjentami i personelem, gośćmi i „mieszkańcami”. Współcześnie w podejściu do rozumienia czym jest szpital - a zatem również do kształtowania architektury obiektów medycznych - można zauważyć dwa równolegle zachodzące zjawiska. Pierwsze to humanizacja szpitala - tendencja oznaczająca przejście od ‘funkcjonalnej przestrzeni’ ukierunkowanej na technologię medyczną do ‘przestrzeni przyjaznej’ rozumianej jako środowisko sprzyjające zdrowieniu. Drugie to komercjalizacja procesu leczenia, akcentująca wymiar handlowy, stąd mowa o usługach medycznych jako towarze, zaś architektura oraz przestrzeń w szpitalu postrzegana jest jako produkt o określonym wizerunku. Artykuł ma na celu przestudiowanie na przykładach w jaki sposób powyższe tendencje znajdują odzwierciedlenie w charakterze przestrzeni ogólnodostępnej współczesnego szpitala: jak wpływają na sposób jej kształtowania oraz jakość.

  • Reduction of noise and rolling resistance by horizontal grinding of asphalt pavements
    • Ulf Sandberg
    • Piotr Mioduszewski
    2015

    Grinding of cement concrete pavements to reduce unevenness and noise is common since a long time. Grinding is then made with wheels equipped with diamond blades rotating in the vertical plane. This creates narrow vertical/longitudinal grooves in the pavement. It is not applied to asphalt pavements. In this paper an alternative type of grinding is studied. In this case plates with diamond heads rotate in the same plane as the pavement, thus shaving off peaks in the pavement texture. The result is a pavement with a "negative texture". This type of (horizontal) grinding has been applied in Sweden in various ways to a stone mastic asphalt pavement as well as to a porous asphalt pavement. Also an Australian study is reviewed. This paper describes the technique and its effect on tire/road noise, tire/road rolling resistance and skid resistance. It is found that noise is reduced by 0-3 dB by the horizontal grinding on both pavement types considered, and that rolling resistance is reduced by 7-14 %. This applies to the first year of service but the effects are reduced with time relatively fast. However, depending on the circumstances and the cost of grinding the effect may be technically and economically justified.

  • Referat generalny do sekcji 8: zagadnienia wybrane elektroenergetyki
    • Waldemar Kamrat
    2015

    Referat generalny do sekcji 8 - zagadnienia wybrane elektroenergetyki. Przedstawiono listę pytań do autorów referatów.

  • Regional implementation of a road safety observatory in Poland
    • Joanna Żukowska
    2015 Full text Archives of Transport

    The paper outlines the background and goals of the Road Safety Observatory in the Polish region of Warmia and Mazury. While created it was Poland’s first road safety Observatory, both at the regional and central level. Established in line with the methodology proposed in the European project SafetyNet, together with the planned National Road Safety Observatory it will form part of a Europe-wide network of observatories linked with the European Road Safety Observatory (ERSO). Commissioned by the Regional Road Safety Centre in Olsztyn, the idea for the Warmia-Mazury Road Safety Observatory was developed in 2010. The Observatory was completed in the autumn of 2012 and opened in November 2012.