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Gdańsk University of Technology

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Publications from the year 2013

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  • Aplikacja RDC - Repozytorium dokumentów cyfrowych
    • Radosław Brendel
    • Andrzej Sobecki
    • Mateusz Westa
    • Grzegorz Zaborowski
    • Łukasz Borek
    2013

    Określono potrzeby i wymagania na utworzenie systemu zarządzającego repozytorium dokumentów cyfrowych - RDC. Opisano wymagania projektowe i przypadki użycia. Przedstawiono ogólny model architektury systemu oraz opis automatycznej klasyfikacji dokumentów. RDC jest systemem, który łączy w sobie podstawowe funkcje aplikacji nadzorującej gromadzenie dokumentów, w szczególności prac dyplomowych, wraz z dodatkowymi mechanizmami, które umożliwiają automatyczną klasyfikację tematyczną.

  • Aplikacja wspomagania badań medycznych
    • Tomasz Dziubich
    2013

    Opisano przeznaczenie i konstrukcję aplikacji wspomagania badań medycznych WBM. Przedstawiono układ komponentów i modułów składowych w modelu warstwowym. Scharakteryzowano proces wytwarzania aplikacji. Opisano utworzoną architekturę sprzętową niezbędną do prawidłowej realizacji funkcjonalności aplikacji WBM.

  • Apparent molar volumes and compressibilities of lanthanum, gadolinium, lutetium and sodium trifluoromethanesulfonates in N,N-dimethylformamide and N,N-dimethylacetamide
    • Dorota Warmińska
    • Anna Fuchs
    • Daniel Lundberg
    2013 JOURNAL OF CHEMICAL THERMODYNAMICS

    Zmierzono gęstości roztworów trifluorometanosulfonianów lantanu, gadolinu i lutetu w N,N-dimetyloformamidzie i N,N-dimetyloacetamidzie w szerokim zakresie temperatur. W oparciu o uzyskane wartości gęstości wyznaczono pozorne objętości molowe, cząstkowe objętości molowe oraz rozszerzalności izobaryczne. Dodatkowo zmierzono szybkości rozchodzenia się dźwięku w badanych roztworach w 298,15 K i wyznaczono pozorne ściśliwości molowe trifluorometanosulfonianów lantanu, gadolinu i lutetu w DMF i DMA. Dokonano analizy uzyskanych wielkości i omówione je w kontekście oddziaływań jon - rozpuszczalnik.

  • Applicability of an effective conductivity approach in modeling thoracic impedance changes
    • Magdalena Madej
    • Bart Truyen
    • Cristina Boca
    • Jerzy Wtorek
    2013 Full text Journal of Physics : Conference Series

    This paper describes numerical simulations of the influence of conductivity changes inside a volume conductor on impedance changes measured on its surface. A simple model based on the finite element method has been developed to estimate an applicability of the effective conductivity theory in human chest modeling. The model consisted of a cylinder with two concentric spheres inside. Simulations were performed for two cases: first the geometry was changing and material properties were constant within each subdomain, next, the geometry was constant but conductivity values were changing for each phase of cardiac cycle. In the considered range of geometry changes dependence between impedance changes calculated for two models was linear. Performed simulations showed that effective conductivity approach can be utilized when studying dynamic processes involved by volume changes of internal organs.

  • Application and optimization of headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography - flame-ionization detector (GC-FID) to determine products of the petroleum industry in aqueous samples
    • Maciej Tankiewicz
    • Calum Morrison
    • Marek Biziuk
    2013 MICROCHEMICAL JOURNAL

    A simple and solvent-free analytical method has been optimized for the determination of hydrocarbons (C6 - C20) from products of the petroleum industry in aqueous samples. Extraction and analysis was carried out using headspace solid-phase microextraction (HS-SPME) and gas chromatography coupled with flame-ionization detector (GC-FID). A ZB-5 capillary column (30 m × 0.25 mm inner diameter, 0.25 µm film thickness) was used for GC separation and a 100 µm polydimethylsiloxane (PDMS) fiber was used to isolate the analytes. Parameters of HS-SPME, analytes desorption and GC-FID were selected and an analytical procedure is proposed. Under the optimum conditions the limits of detection were in the range of 2.0 - 13 µg L-1 and the relative standard deviations were between 2.6 - 14%. The developed analytical method was successfully applied to the analysis of water contaminated by unleaded petrol and unfiltered water used to extinguish a simulated fire.

  • Application development for Android, iOS and BlackBerry mobile platforms
    • Łukasz Markiewicz
    • Krzysztof Drypczewski
    • Bartosz Wiśniewski
    • Tomasz Bieliński
    2013

    Mobile devices, along with dedicated operating systems, have become a substantial and rising trend in software development. Computer industry has significantly changed in order to fulfil the needs of this new segment of the market. Authors have participated in projects, which involved programming on Android, iOS and BlackBerry operating systems. In this paper the most popular mobile platforms (and multiplatform Unity3D environment) are presented from the developer’s point of view.

  • Application of analytical methods for the determination of bioactive compounds in some berries
    • Shela Gorinstein
    • Patricia Arancibia-Avila
    • Fernando Toledo
    • Jacek Namieśnik
    • Hanna Leontowicz
    • Maria Leontowicz
    • Kyung-Sik Ham
    • Seong-Gook Kang
    • Kann Vearasilp
    • Milan Suhaj
    2013 Food Analytical Methods

    Fluorometry, ESI-MS, FTIR, and radical scavenging assays were used for characterization of bioactive compounds and the levels of their antioxidant activities. Polyphenols, flavonoids, anthocyanins, and ascorbic acid and the level of antioxidant activity of water extracts of “Murtilla-like” [Myrteola nummularia (Poiret) Berg.], and other widely consumed berries were determined and compared. The contents of bioactive compounds and the levels of antioxidant activities in water extracts differed significantly in the investigated samples (P < 0.05). “Murtilla-like” extracts contained polyphenols (mg GAE/g)—19.13 ± 0.9, flavonoids, (mg CE/g)—3.12 ± 0.1, anthocyanins (mg CGE/g)—120.23 ± 5.4, and ascorbic acid (mg/g)—2.20 ± 0.1; and antioxidant activities (μmolTE/g) by ABTS and CUPRAC assays were 200.55 ± 8.7 and CUPRAC 116.76 ± 5.7, respectively. Chemometrical processing was done on the basis of kinetic data of two variables (concentration and reaction time) by DPPH scavenging reaction. Polyphenol content highly correlated with antioxidant capacity (R2 from 0.96 to 0.83). The quenching properties of berries were studied by the interaction of water polyphenol extracts with a small protein such as BSA by 3-D fluorescence and FTIR spectroscopy. These methods were used as additional tools for the characterization of polyphenols. Wild-grown non-investigated berries were compared with widely consumed ones, using their bioactive composition, antioxidant activities, and antiproliferative and fluorescence properties. In conclusion, the antioxidant properties of “Murtilla-like” can be used as a new source for consumption. The bioactivity of “Murtilla-like” is comparable with blueberries and raspberries. 3-D fluorescence and FTIR spectroscopy can be applied as additional analytical tools for rapid estimation of the quality of food products.

  • Application of DIC technique to concrete - study on objectivity of measured surface displacements
    • Łukasz Skarżyński
    • Jan Kozicki
    • Andrzej Tejchman-Konarzewski
    2013 Full text EXPERIMENTAL MECHANICS

    Artykuł omawia wyniki pomiarów szerokości lokalizacji odkształceń na powierzchni betonu podczas zginania belek. Wykonano obszerne studia nad obiektywnością pomierzonych przemieszczeń w betonie. Opracowano własna metodę do obliczeń szerokości lokalizacji.

  • Application of electrochemical impedance spectroscopy to monitoring discharging process of nickel/metal hydride battery.
    • Paweł Ślepski
    • Kazimierz Darowicki
    • Ewa Janicka
    • Agnieszka Sierczyńska
    2013 JOURNAL OF POWER SOURCES

    This paper presents the possibility of applying impedance analysis to cell diagnostics. In order to obtain characteristic curves of both electrodes of a NiMH battery simultaneously, a reference electrode was added into the circuit. The authors analysed the cell under three cases, i.e. when its properties are determined only by the state of the positive electrode, only by the state of the negative electrode, or when both electrodes determine operation of the cell to the same extent. Impedance characteristic curves of the entire cell in the function of variable state of charge do not allow for a conclusion as to which electrode determines cell capacity. This is not possible until an analysis of impedance graphs is carried out for each electrode. In view of the obtained results equivalent circuits for the positive electrode, the negative electrode, and the entire cell were selected. Further, a correlation between charge transfer resistance, calculated for the entire cell, and the values obtained for the positive electrode, as well as the negative one, is presented.

  • Application of Fracture Mechanics for Energetic Effects Predictions While Wood Sawing
    • Kazimierz Orłowski
    • Tomasz Ochrymiuk
    • Anthony Atkins
    • Daniel Chuchała
    2013 Full text WOOD SCIENCE AND TECHNOLOGY

    In the classical approach, energetic effects (cutting forces and cutting power) of wood sawing process are generally calculated on the basis of the specific cutting resistance, which is in the case of wood cutting the function of more or less important factors. On the other hand, cutting forces (or power - more interesting from energetic point of view) could be considered from a point of view of modern fracture mechanics. Cutting forces may be employed to determine not only toughness but also shear yield strength, which are then applied in the models. Furthermore, forecasting of the shear plane angle for the cutting models, which include fracture toughness in addition to plasticity and friction, broaden possibilities of energetic effects modelling of the sawing process even for small values of the uncut chip. Mentioned models are useful for estimation of energetic effects of sawing of every kinematics. However, for band saws and circular sawing machines the chip acceleration power variation as a function of mass flow and tool velocity ought to be included in analysis of sawing at larger cutting speeds.

  • Application of Illuminating Modes concept in modal expansion of elliptical resonator
    • Mariusz Pergoł
    • Włodzimierz Zieniutycz
    2013

    In the paper an IlluminatingModes (IM) approach as an extension of Spectral Domain Approach (SDA) is presented. IM concept is applied to the case of open microstrip planar elliptical resonator. A modal expansion of currents induced in the structures during illuminating them by a single plane wave is the novelty of the method. As an example of application of the method, we present the results obtained by an examination of two resonators illuminated in two different ways. The amplitudes of current modes induced in the structures are found as well as the scattered fields. All the results yield some new knowledge related to the field phenomena occurring in resonators.

  • Application of infrared thermoography to non-contact testing of varistors
    • Stanisław Galla
    • Alicja Konczakowska
    2013 Full text Metrology and Measurement Systems

    Testing of varistors using thermography was carried out in order to assess their protective properties against possible overvoltage phenomena in the form of high-level voltage surges. An advantage of the thermography technique is non-contact temperature measurement. It was proposed to assess the properties of varistors workingin electronic devices as protective elements, on the basis of estimating temperature increments on varist or surfaces, registered by an infrared camera during surge resistance tests with standard voltage levels. To determine acceptable temperature increments on a tested varistor, preliminary testing was performed of P22Z1 (Littelfuse) and S07K14 (EPCOS) type varistors, working first at a constant load and presently during surge tests,. The thermographic test results were compared with measured varistor capacity values before and after tests. It was found that recording with thermography temperature increments greater than 6C for both P22Z1 and S07K14 varistor types detects total or partial loss of varistor protective properties. The test results were confirmed by assessment of protective properties of varistors working in output circuits of low nominal voltage devices.

  • Application of microturbines in CHP systems with reciprocating engines
    • Adam Cieśliński
    • Marian Piwowarski
    • Krzysztof Kosowski
    2013

    The analysis was carried out for Combined Heat and Power generation systems with micro-turbines power plants working on heat rejected from the reciprocating engine. The calculations were performed for GE Jerbacher engines of J320 GS- C05, J320 GS- C25 and J416 GS- B05 types. We considered different working media (both wet and dry fluids): water, ammonia, ethanol, methanol, methylacetylene (propyne), dimethyloether, sulphur dioxide, acetone, butane, butene, trans-butene, cyclohexane, benzene, cyclopentane, dimethyl ester, hexane, isopentane, isobutene, isohexane, pentane, neopentane, octane, MDM siloxane, toluene, R11, R113, R114, R123, R141b, R142b, R236ea, R245fa, R245ca, R365mfc, HFE7100. The calculations comprised various working media and four different thermodynamic cycles.

  • Application of Multiplicative Drift Correction and Component Correction methods on simulated gas sensor array responses
    • Paweł Kalinowski
    • Grzegorz Jasiński
    2013

    Sensor response drift is one of the most challenging problems in gas-analyzing systems. Such systems, commonly called electronic noses, are expected to be reliable and reproducible in the long term. Due to the drift phenomena, electronic noses usability is limited to the relatively short period of time, and frequent recalibrations of device are required. Because it is very hard to fabricate sensors without drift, this phenomenon has to be detected and can be compensated using signal processing methods in order to extend sensor array operation time. In this work, two approaches for drift compensation, namely Multiplicative Drift Correction and Component Correction methods, are presented. Analysis of the simulated gas sensor array response is shown.

  • Application of multivariate statistics in assessment of green analytical chemistry parameters of analytical methodologies
    • Marek Tobiszewski
    • Stefan Tsakovski
    • Vasil Simeonov
    • Jacek Namieśnik
    2013 GREEN CHEMISTRY

    The study offers a multivariate statistical analysis of a dataset, including the major metrological, “greenness” and methodological parameters of 43 analytical methodologies applied for aldrin determination (a frequently analyzed organic compound) in water samples. The variables (parameters) chosen were as follows: metrological (LOD, recovery, RSD), describing the “greenness” (amount of the solvent used, amount of waste generated) and general methodological parameters (sample volume, time of analysis, injection volume) and scores of greenness assessment with NEMI and eco-scale. The results of the study show that all analytical methodologies have been grouped into three clusters. The first one consisted of “non-green” LLE and SPE methodologies and the other two consisted of solventless or virtually solventless methodologies. The NEMI and eco-scale scores are well correlated, which indicates the similarity between these two assessment scales. A self-organizing maps technique is not feasible for easy and quick labeling of analytical methodologies in terms of their greenness. However, the multivariate analysis of analytical methodologies can give information about clustering of methodologies to “green” or “nongreen” groups and some extra information about relations between objects inside clusters of interest.

  • Application of normal-phase high-performance liquid chromatography followed by gas chromatography for analytics of diesel fuel additives
    • Grzegorz Boczkaj
    • Mariusz Jaszczołt
    • Andrzej Przyjazny
    • Marian Antoni Kamiński
    2013 Full text ANALYTICAL AND BIOANALYTICAL CHEMISTRY

    The paper presents the results of investigations on new procedures of determination of selected cleaning additives in diesel fuel. Two procedures: one-step analysis using gas chromatography with flame ionization detection (GC-FID) or mass spectrometry (GC-MS) and a two-step procedure in which normal-phase high-performance liquid chromatography (NP-HPLC) was used for preliminary separation of the additives, were compared. The additive fraction was collected using either simple elution or eluent backflush. Final determinations were performed by GC-FID and GC-MS. The studies revealed that it was impossible to determine the investigated analytes by one-step procedures, i.e. by using solely HPLC or GC. On the other hand, the use of a two-step procedure ensures reproducible results of determinations, and the limits of quantitation are, depending on the method of fraction collection by HPLC, from 1.4–2.2 ppm (GC-MS in SIM mode) to 9.6–24.0 ppm (GC-FID). Precision and accuracy of the developed procedures are compared, and possible determination errors and shortcomings discussed.

  • Application of principal component and hierarchical cluster analysis in classifying defects of trolleybuses
    • Mikołaj Bartłomiejczyk
    • Marcin Połom
    • Kristina Jakimovska
    2013 Full text Przegląd Elektrotechniczny

    The failure rate of vehicles is a relevant task, which is strictly connected with the reliability of transportation systems. Methods of data analysis allow us to find similarity and differences between failure rates of several parts of trolleybuses. This paper deals with the statistic of failure of trolleybuses from the municipal transport company of Gdynia (Poland).

  • APPLICATION OF SATELLITE IMAGERY AND GIS TOOLS FOR LAND SURFACE TEMPERATURE ESTIMATION AND VERIFICATION
    • Andrzej Chybicki
    • Zbigniew Łubniewski
    • Jan Niedzielko
    • Dominik Ruciński
    2013 Full text HYDROACOUSTICS

    Land surface temperature (LST) plays an important role in many land-surface processes on regional as well on global scales. It is also a good indicator of energy flux phenomena and is used as a parameter in various Earth observation related studies. However, LST estimation based on processing and utilisation of satellite derived data constitutes several problems in terms of time limitations, accessibility, atmospheric influence etc. The aim of the study was to verify and compare the algorithms especially in the context of minimalisation of errors in LST estimation by satellite observation using various means of GIS data processing and integration. Also, the indirect verification of the LST estimation methods, based on the utilisation of statistics and dependencies of LST, NDVI and air temperature values has been presented and discussed. The presented work has the form of a case study, and due to limited amount of verification data used in the current stage of the investigation, the results should be treated as preliminary. The developed GIS solution for integrating spatial data from many sources needed in the course of this study is also presented.

  • Application of Semantic Knowledge Management System in Selected Areas of Polish Public Administration
    • Anna Wróblewska
    • Aleksandra Zięba
    • Renata Mieńkowska - Norkiene
    • Paweł Kapłański
    • Paweł Zarzycki
    2013 Full text Roczniki Kolegium Analiz Ekonomicznych

    This paper describes an application of semantic technologies and knowledge management systems in chosen areas of Polish public administration. Short analyses of crisis management and EU policy coordination processes are presented. An architecture of a knowledge management system with interfaces using controlled natural language is proposed. A lot of examples are shown that prove a usefulness of semantic knowledge management and automated reasoning in these fields.

  • Application of Shape From Shading Technique for Side Scan Sonar Images
    • Krzysztof Bikonis
    • Marek Moszyński
    • Zbigniew Łubniewski
    2013 Full text Polish Maritime Research

    Side scan sonar (SSS) is one of the most widely used imaging systems in the underwater environment. It is relatively cheap and easy to deploy in comparison with more powerful sensors like multibeam echosounder or synthetic aperture sonar. Although, the SSS does not provide directly the seafloor bathymetry measurements. Its outputs are usually in a form of grey level acoustic images of seafloor. However, the analysis of such images performed by human eye allows creating semi-spatial impressions on seafloor relief and morphology. The 3D shape reconstruction from 2D images using SFS approach is one of classical problems in computer vision. In the paper, some methods based on Shape From Shading (SFS) technique for SSS images processing are presented. In the first method, the 3D seafloor relief is reconstructed using the information from both the currently processed and previous ping. The second method relies on the estimating the altitude gradient of the insonified surface from sonar data, combined with the use of shadow areas dimension. It is applied for 3D objects shape reconstruction and imaging.