2015 - Repozytorium publikacji - Politechnika Gdańska

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Publikacje z roku 2015

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Electron ionization and low energy electron attachment to molecules of biological interest
- Małgorzata Śmiałek-Telega
- K. Tanzer
- M. Neustetter
- S .e. Huber
- R Schürmann
- Ilko Bald
- Stephan Denifl
2015 Pełny tekst Journal of Physics : Conference Series
Ethylenediaminetetraacetic acid (EDTA) and 2-amino-2-(hydroxymethyl)-1,3-propanediol (TRIS) were investigated by electron impact ionization and low energy electron attachment. Both compounds are components of biological buffers and often are used as DNA stabilizers in irradiation studies. hus it is of a great importance to understand their potential interactions with radiation. Our results revealed that at least one of them, EDTA, may influence the experimental outcomes by O− and OH− production upon electron attachment.
Electronic and ionic relaxations in strontium-borate glass and glass-ceramics containing bismuth and vanadium oxides
- Natalia Anna Wójcik
- Piotr Kupracz
- Marta Prześniak-Welenc
- Jakub Karczewski
- Maria Gazda
- Katatrzyna SiuzdaK
- Ryszard Jan Barczyński
2015 Pełny tekst SOLID STATE IONICS
The topography, microstructure and electrical properties of strontium-borate glass and SBO glass containing bismuth and vanadium oxides, were studied. The structure was measured using X-ray diffraction (XRD), Energy Dispersive X-ray Spectrometer (EDS) and Scanning electron microscope (SEM) methods. The A.C. complex conductivity was investigated as a function of temperature and frequency. The influence of the quantity of bismuth and vanadium oxides present, on glasses microstructure and electrical properties, was discussed. In order to obtain glass-ceramics, the glasses were subjected to crystallization at temperatures close to the exothermic processes indicated by the differential scanning calorimetry (DSC) measurements. X- ray diffraction (XRD) measurements were carried out to determine the presence of bismuth vanadate (Bi2VO5.5) crystalline phase in heat-treated samples. After heat-treatment, there were still some traces of the glassy phase within the samples. The effect of the crystallization process on the microstructure, topography and dielectric behavior of the material was analyzed. The A.C. dielectric permittivity, conductivity and impedance were discussed at specific temperature and frequency region, in addition conduction mechanisms were proposed.
Electrostatic interface recombination in the system of disordered materials characterized by different permittivities
- Jędrzej Szmytkowski
2015 SYNTHETIC METALS
We report on the analysis of an electrostatic interface recombination in a system consisting of disordered organic materials. This process is a consequence of the polarization effect which takes place at the interface of two phases characterized by different permittivities. In this paper, the impact of tail and deep localized states on the recombination order is demonstrated. We also discuss the influence of temperature on this process.
Elektrownia Masovia Centre for Contemporary Art
- Monika Arczyńska
2015
Text on Elektrownia Masovia Centre for Contemporary Art in Radom.
Elektrownie słoneczne
- Jolanta Fieducik
- Jan Godlewski
2015 Czysta Energia
Przetwarzanie energii słonecznej na inne użyteczne rodzaje energii nieustannie jest ważnym zadaniem dla naukowców, techników i technologów.
Elektryczne autonomiczne jednostki trakcyjne na linii Pomorskiej Kolei Metropolitalnej?
- Natalia Karkosińska-Brzozowska
- Krzysztof Karwowski
2015 Technika Transportu Szynowego
Zasobniki energii są instalowane na pokładach elektrycznych pojazdów szynowych głównie w celu odzyskiwania energii hamowania. Postęp technologiczny w zakresie energoelektroniki i magazynowania energii umożliwił wykorzystanie energii elektrycznej do autonomicznej jazdy pojazdów w przypadku awarii sieci trakcyjnej oraz na niezelektryfikowanych odcinkach linii. Zastosowanie te mogą być alternatywą dla sieci trakcyjnej i mają miejsca przede wszystkim w tramwajach i trolejbusach oraz rzadziej w systemach kolejowych. W artykule przedstawiono studium zastosowania zasobnikowej jednostki trakcyjnej na linii Pomorskiej Kolei Metropolitalnej. W ramach stu-dium opracowano model symulacyjny w oprogramowaniu Matlab/Simulink i przeprowadzono w nim przejazd teo-retyczny. Na podstawie wyników bilansu energetycznego dobrano zasobnik umożliwiający zasilenie pojazdu na wybranym odcinku PKM.
Eliminacja strat pracy maszyn w procesach aparaturowych
- Radosław Drozd
- Marek Wirkus
2015 Logistyka
W niniejszym artykule zostały przedstawione wyniki badań w zakresie eliminacji strat maszyn występujące na linii produkcyjnej w procesach aparaturowych u producenta farb proszkowych przedsiębiorstwa X. Dodatkowo autorzy zaproponowali własne metody organizacyjne , które zasadniczo zmniejszą straty maszyn na linii produkcyjnej i spowodują większą niezawodność parku maszynowego.
Elimination of excretion of ibuprofen and its metabolites in horses
- Emilia Waraksa
- Marzena Wójtowicz
- Dorota Kwiatkowska
- Jacek Namieśnik
2015
Analytical procedure based on application of gas chromatography-mass spectrometry (GC-MS) at the step of detection, identification and quantitation of ibuprofen (IBU) and detection of its metabolites – 1-hydroxyibuprofen (1-OH IBU) and carboxyibuprofen (CBX IBU) in horse urine by selected ion monitoring mode after sample preparation covering extraction at pH 3-4 and methylation has been used. The ions at m/z 161, 220 (methylated ibuprofen), 178, 119 (methylated 1-hydroxyibuprofen) and 145, 264 (methylated carboxyibuprofen) was monitored to indicate the presence of investigated compounds in horse urine. The method was successfully applied to urine samples taken from two horses H1 and H2 that had been given a single oral dose of 0.9 and 1.1 mg/kg of ibuprofen respectively. The results of excretion of ibuprofen and its metabolites were reported.
Elimination of Impulsive Disturbances From Stereo Audio Recordings Using Vector Autoregressive Modeling and Variable-order Kalman Filtering
- Maciej Niedźwiecki
- Marcin Ciołek
- Krzysztof Cisowski
2015 Pełny tekst IEEE Transactions on Audio Speech and Language Processing
This paper presents a new approach to elimination of impulsive disturbances from stereo audio recordings. The proposed solution is based on vector autoregressive modeling of audio signals. Online tracking of signal model parameters is performed using the exponential ly weighted least squares algo- rithm. Detection of noise pulses an d model-based interpolation of the irrevocably distorted sampl es is realized using an adaptive, variable-order Kalman filter. The proposed approach is evalu- ated on a set of clean audio signals contaminated with real click waveforms extracted from old gramophone recordings
e-logistyka dystrybucji a czynnik ludzki w procesie kształtowania wartości marki - ujęcie praktyczne
- Wioleta Kucharska
- Radosław Drozd
2015 Pełny tekst Marketing i Zarządzanie
Artykuł poświęcono interdyscyplinarnemu przedstawieniu istoty relacji sprzedaży, marketingu i logistyki w kontekście aktualnych problemów w e-logistyce dystrybucji. Autorzy artykułu, na bazie swoich doświadczeń, przedstawili istotę koordynacji tych procesów w kontekście zidentyfikowanego wirusa problemów dotyczącego e-logistyki dystrybucji w całej sieci wartości przedsiębiorstwa produkcyjnego oraz zaproponowali rozwiązania. Artykuł ma charakter teoretyczny, stanowi wskazania kierunków działania dla przedsiębiorstw, które obserwują trudności w zakresie koordynacji i integracji powyższych obszarów. Kluczową tezą postawioną w artykule jest wskazanie wiodącej roli czynnika ludzkiego jako źródła problemów najsilniej wpływających na dane wejściowe, przebieg oraz wynik e-logistyki dystrybucji danych, co bezpośrednio przekłada się na wartość marki.
E-MEDIACJE JAKO PRZEDSIĘBIORCZA STRATEGIA ROZWIĄZYWANIA KONFLIKTÓW = E-mediation – the entrepreneurial strategy of conflict resolution
- Beata Krawczyk-Bryłka
- Iwona Flis
2015 Pełny tekst Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Artykuł dotyczy tematu e-mediacji, które są nowoczesną metodą rozwiązywania konfliktów gospodarczych, zakładającą zastosowanie innowacyjnych rozwiązań informatycznych w procesie zarzadzania konfliktem. Zaprezentowano wyniki badań, które przeprowadzono na grupie polskich przedsiębiorców, by zweryfikować postawy wobec e-mediacji i gotowość korzystania z tego rozwiązania w sytuacjach konfliktowych.
Emergent Versus Deliberate Knowledge Management Strategy: Literature Review and Case Study Analysis
- E. Bolisani
- E. Scarso
- Małgorzata Zięba
2015
This paper discusses emergent and deliberate knowledge management (KM) strategies on the basis of literature review and case study analysis. It grounds on the results of a comprehensive analysis of the literature on KM strategies and approaches adopted by companies of various sizes. Although KM strategies have been abundantly examined by scholars, not many studies compare deliberate and emergent approaches. By examining the case of two companies that adopted the two opposite approaches, the paper contributes to a better understanding of their character. The two KM approaches are illustrated with regard to aspects such as: origin, restraints, promoters, scope, universality, and adaptability. In addition, although it is not possible to generalize, and such an assignment cannot be taken as a golden rule, the paper advocates that emergent KM strategies might better fit the characteristics of small firms, while deliberate KM strategies might be more appropriate in the case of larger companies. Furthermore, the analysis seems to indicate that emergent KM approach is more in line with a KM personalisation strategy. At the same time both the approaches can equally support the different KM processes. The study suggests that companies should be aware of the strengths and the weaknesses of the two approaches, in order to choose the one that is more suitable to their organisational settings and operational circumstances. A limitation of the study is that the empirical results are restricted to two companies only (one in Italy and one in Poland).
Emotion Monitor - Concept, Construction and Lessons Learned
- Agnieszka Landowska
2015 Pełny tekst Annals of Computer Science and Information Systems
This paper concerns the design and physical construction of an emotion monitor stand for tracking human emotions in Human-Computer Interaction using multi-modal approach. The concept of the stand using cameras, behavioral analysis tools and a set of physiological sensors such as galvanic skin response, blood-volume pulse, temperature, breath and electromyography is presented and followed by details of Emotion Monitor construction at Gdansk University of Technology. Some experiments are reported that were already held at the stand, providing observations on reliability, accuracy and value the stand might provide in human-systems interaction evaluation. The lessons learned at this particular stand might be interesting for the other researchers aiming at emotion monitoring in human-systems interaction.
Emotion Recognition for Affect Aware Video Games
- Mariusz Szwoch
- Wioleta Szwoch
2015 Advances in Intelligent Systems and Computing
In this paper the idea of affect aware video games is presented. A brief review of automatic multimodal affect recognition of facial expressions and emotions is given. The first result of emotions recognition using depth data as well as prototype affect aware video game are presented
Emotion Recognition Using Physiological Signals
- Wioleta Szwoch
2015
In this paper the problem of emotion recognition using physiological signals is presented. Firstly the problems with acquisition of physiological signals related to specific human emotions are described. It is not a trivial problem to elicit real emotions and to choose stimuli that always, and for all people, elicit the same emotion. Also different kinds of physiological signals for emotion recognition are considered. A set of the most helpful biosignals is chosen. An experiment is described that was performed in order to verify the possibility of eliciting real emotions using specially prepared multimedia presentations, as well as finding physiological signals that are most correlated with human emotions. The experiment was useful for detecting and identifying many problems and helping to find their solutions. The results of this research can be used for creation of affect-aware applications, for instance video games, that will be able to react to user’s emotions.
Endocrine Disrupting Compounds – Problems and Challenges
- Błażej Kudłak
- Natalia Jatkowska
- Katarzyna Owczarek
- Zofia Mazerska
- Jacek Namieśnik
2015
In this chapter, information about some of the estrogenic compounds and their environmental fate and biological influence can be found. Special attention is paid to the review of the analytical approaches used at the stages of detection and determination of Endocrine Disrupting Compounds (EDCs) in the environmental samples. Also, a brief characterization of both cellular and non-cellular bioassays is presented. The discovery of micropollutants occurring in the environment resulted in new methodologies being put into the analytical practice. These methodologies are developed in two different directions. The first is based on methodological solutions designed to detect, identify, and determine xenobiotics that occur in various environmental samples. For this purpose, instrumental methods such as gas and liquid chromatography with mass spectrometry detection are usually used. The second approach is to put into the analytical practice the new bioanalytical methodologies. These methodologies allow the estimation of the sample endocrine potential, but they do not provide the information about which of the sample ingredient is responsible for causing the toxic effect. These results can be the basis for estimating the endocrine potential of the environment exhibited by certain species. Moreover, bioanalytical techniques may be supplementary to the techniques of quantitative and qualitative determination of EDCs.
Endohedral gallide cluster superconductors and superconductivity in ReGa5
- Weiwei Xie
- Huixia Luo
- Brendan Phelan
- Tomasz Klimczuk
- Francois Cevallos
- Robert J. Cava
2015 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
We present transition metal-embedded (T@Gan) endohedral Ga clusters as a favorable structural motif for superconductivity and develop empirical, molecule-based, electron counting rules that govern the hierarchical architectures that the clusters assume in binary phases. Among the binary T@Gan endohedral cluster systems, Mo8Ga41, Mo6Ga31, Rh2Ga9, and Ir2 Ga9 are all previously known superconductors. The well-known exotic superconductor PuCoGa5 and related phases are also members of this endohedral gallide cluster family. We show that electron-deficient compounds like Mo8Ga41 prefer architectures with vertex-sharing gallium clusters, whereas electron-rich compounds, like PdGa5, prefer edge-sharing cluster architectures. The superconducting transition temperatures are highest for the electron-poor, corner-sharing architectures. Based on this analysis, the previously unknown endohedral cluster compound ReGa5 is postulated to exist at an intermediate electron count and a mix of corner sharing and edge sharing cluster architectures. The empirical prediction is shown to be correct and leads to the discovery of superconductivity in ReGa5. The Fermi levels for endohedral gallide cluster compounds are located in deep pseudogaps in the electronic densities of states, an important factor in determining their chemical stability, while at the same time limiting their superconducting transition temperatures.
Energetyka a klimat : mechanizmy zmian klimatu atmosfery -problem genezy współczesnego ocieplenia
- Henryk Boryń
- Kornel Borowski
- Stanisław Czapp
- Leszek Czarnecki
- Adrian Halinka
- Zbigniew Hanzelka
- Jakub Karczewski
- Zdzisław Kusto
- Andrzej A. Marsz
- Marian Miłek
- Małgorzata Pruszkowska-Caceres
- Piotr Rrzepka
- Aleksander Stachel
- Anna Styszyńska
- Paweł Surdacki
- Mateusz Szablicki
2015
Publikacja podnosi ważne z punktu energetycznego zagadnienia. Książka jest przeznaczona dla inżynierów elektryków i pokrewnych specjalności zajmujących się technicznymi, ekonomicznymi i ekologicznymi aspektami zużycia energii elektrycznej.
Energy requirements for methods improving gas detection by modulating physical properties of resistive gas sensors
- Maciej Trawka
- Mateusz Kotarski
2015
Abstract. One of the most important disadvantage of resistive gas sensors is their limited gas selectivity. Therefore, various methods modulating their physical properties are used to improve gas detection. These methods are usually limited to temperature modulation or UV light irradiation for the layers exhibiting photocatalytic effect. These methods cause increased energy consumption. In our study we consider how much energy has to be supplied to utiliz such methods and what kind of additional information can be gathered. We present experimental results of selected resistive gas sensors, including commercial and prototype constructions, and practical solutions of modulating their physical properties
Enhanced capacitance of composite TiO2 nanotube / boron-doped diamond electrodes studied by impedance spectroscopy
- K. Siuzdak
- M. Sawczak
- Robert Bogdanowicz
- Michał Sobaszek
2015 NANOSCALE
We report on the novel composite nanostructures based on boron-doped diamond thin film grown on top of TiO2 nanotubes. The nanostructures made of BDD-modified titania nanotubes showed an increase in activity and performance when used as electrodes in electrochemical environments. The BDD thin films (~200-500 nm) were deposited using microwave plasma assisted chemical vapor deposition (MW PA CVD) onto anodically fabricated TiO2 nanotube arrays. The influence of boron-doping level, methane admixture and growth time on the performance of Ti/TiO2/BDD electrode was studied in detail. Scanning electron microscopy (SEM) was applied to investigate the surface morphology and grain size distribution. Moreover, the chemical composition of TiO2/BDD electrodes was investigated by means of micro-Raman Spectroscopy. The composite electrodes TiO2/BDD are characterized by the significantly higher capacitive current comparing to BDD film deposited directly onto Ti substrate. The novel composite electrode of TiO2 nanotube array overgrown by boron-doped diamond (BDD) immersed in 0.1 M NaNO3 can deliver specific capacitance of 2.10, 4.79, 7.46 mF cm-2 at a scan rate of 10 mV/s for [B]/[C] ratio 2k, 5k and 10k, respectively. The substantial improvement of electrochemical performance and excellent rate capability could be attributed to synergistic effect of TiO2 treatment in CH4:H2 plasma and high electrical conductivity of BDD layer. Analysis of electrochemical impedance spectra according to electric equivalent circuit allows to determine surface area on the basis of value of constant phase element.