2013 - Publications Repository - Gdańsk University of Technology

Show publications from the year

Publications from the year 2013

Show all

Gas chromatography-olfactometry (GC-O), electronic noses (e-noses) and electronic tongues (e-tongues) for in vivo food flavour measurement
- Waldemar Wardencki
- Tomasz Chmiel
- Tomasz Dymerski
2013
The capter revies two types of artificial olfaction instrumentation, i.e. gas-chromatography-olfactometry (GC-O) and chemical sensor technologies (electronic nose and tongue), combined with multivariate data processing methods as promising approaches for rapid analysis of food. The chapter also includes examples of specific applications for the detection of food flavour and volatile components.
GAS SENSORS WITH TEMPERATURE MODULATION – AN OVERVIEW
- Łukasz Woźniak
- Grzegorz Jasiński
- Piotr Jasiński
2013
Although different methods of improving semiconductor gas sensor properties have been proposed, a technique involving temperature modulation seems to be the most promising. Semiconductor gas sensors working with modulated temperature can be more stable and are more selective comparing with sensor working at one temperature. In this paper, various approaches to temperature modulation are reviewed.
Gaze tracking in multi-display environment
- Tomasz Kocejko
- Jerzy Wtorek
2013
This paper presents the basic ideas of eye and gaze tracking in multiple-display environment. The algorithm for display detection and identification is described as well as the rules for gaze interaction in multi display environment. The core of the method is to use special LED markers and eye and scene tracking glasses. Scene tracking camera registers markers position which is then represented as a cloud of points. Analyzing the mutual positions of detected points the algorithm estimates screen/displays position. Display number is assigned based on special information marker. Described project shows the possibility of hands free interaction in MDE. It also presents how to register visual attention when information is dispersed on several screens.
Gdansk Bay sea bed sounding and classiﬁcation of its results
- Grażyna Grelowska
- Eugeniusz Kozaczka
- Sławomir Kozaczka
2013 Full text Polish Maritime Research
The main goal of this paper is to describe the results of sounding the Gdansk Bay sea bed by using a SES-2000 Standard parametric sub-bottom proﬁler. Quality of data obtained during trials depends inter alia on a proper location of transducer array to reduce inﬂuence of pitch, roll and heave motions as well as ship self noise (resulting from bubbles due to propeller and ﬂow around hull, vibration generated by main engine and auxiliary devices). Furthermore, calibration of complementary units such as GPS, heading sensor, MRU-Z motion sensor and navigation devices make sea-bed investigating system capable of working with its whole capability. Results of so prepared surveys have been presented and discussed. They contain also an elaborated map of Gdansk Bay with preliminarily classiﬁed sea-bed materials and description of most interesting areas.
Gdzie w Kolibkach stał dwór Królowej Marysieńki
- Maria Sołtysik
2013 Rocznik Gdyński
Artykuł wskazuje przypuszczalną lokalizację nieistniejącego już XVII-wiecznego dworu w Kolibkach, związanego m.in. z rodziną Sobieskich. Zawiera wskazówki gdzie w pracach archeologicznych należy szukać jego reliktów
Gelatin-Modified Polyurethanes for Soft Tissue Scaffold
- Justyna Kucińska-Lipka
- Iga Gubańska
- Helena Janik
2013 Full text TheScientificWorldJOURNAL
Recently, in the field of biomaterials, which are being designed for soft tissue scaffolding, is growing the interest of their modification with natural polymers. Synthetic polymers are often hard, not easy to process and they do not possess fine biodegradable profile. From the other hand natural polymers are biocompatible, but weak when used alone. The combination of natural and synthetic polymers gives the suitable properties for tissue engineering. Polyurethanes in our study represent the synthetic polymers, which are prepared from polyester poly(ethylene-butylene adipate) (EBO), aliphatic 1,6-hexamethylene diisocyanate (HDI) and two different chain extenders 1,4-butanediol (BDO) or 2-[2-(2-hydroxyethoxy)ethoxy]ethanol (TG). In our study we replaced expensive isocyanates like 2,6-diisocyanato methyl caproate (LDI) or 1,4-diisocyanatobutane (BDI) with cost effective HDI. The applied natural polymer was collagen derivative - gelatin. By blending in situ of these two polymers we obtained material with increased biocompatybility and biodegradability suitable for soft tissue engineering.
Gender approach to multi-objective optimization of detection systems by pre-selection of criteria
- Zdzisław Kowalczuk
- Tomasz Białaszewski
2013
A novel idea of performing evolutionary computations for solving highly-dimensional multi-objective optimization (MOO) problems is proposed. The information about individual genders is applied. This information is drawn out of the fitness of individuals and applied during the parental crossover in the evolutionary multi-objective optimization (EMO) processes. The paper introduces the principles of the genetic-gender approach (GGA) and illustrates its performance by means of examples of multi-objective optimization tasks.
Generalized adaptive comb filters/smoothers and their application to the identification of quasi-periodically varying systems and signals
- Maciej Niedźwiecki
- Michał Meller
2013 Full text AUTOMATICA
The problem of both causal and noncausal identification of linear stochastic systems with quasiharmonically varying parameters is considered. The quasi-harmonic description allows one to model nonsinusoidal quasi-periodic parameter changes. The proposed identification algorithms are called generalized adaptive comb filters/smoothers because in the special signal case they reduce down to adaptive comb algorithms used to enhance or suppress nonstationary harmonic signals embedded in noise. The paper presents a thorough statistical analysis of generalized adaptive comb algorithms, and demonstrates their statistical efficiency in the case where the fundamental frequency of parameter changes varies slowly with time according to the integrated random-walk model.
Generalized Chebyshev Bandpass Filters With Frequency-Dependent Couplings Based on Stubs
- Łukasz Szydłowski
- Natalia Leszczynska
- Michał Mrozowski
2013 IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
This paper presents an accurate synthesis method for inline and cross-coupled generalized Chebyshev bandpass filters with frequency-dependent couplings implemented via open and short stubs. The technique involves the synthesis of a lumped-element prototy pe in the form of a coupling matrix with a frequency-dependent term and the conversion of this prototype to a distributed-element mode l composed of sections of TEM lines. This takes into account the impedance (or admittance) of the stubs, thus allowing compensation for the loading effect. The design equations are derived for the stub impedance in terms of a coupling coefficient and for the allowable frequency range in which the model is valid. Additionally, the proposed methodology allows the simultaneous application of frequency-dependent cou- plings with positive and negative dispersive parts within the same network. The validity of this method is confirmed by numerical tests and through experiments, including filters with dispersive couplings of the opposite signs.
Generalized quazilinearization for systems of degenerate singular perturbation problem
- Ahmed R. Abd-Ellateef Kamar
- Tadeusz Jankowski
2013 Nonlinear Studies
Praca dotyczy ogólnej metody kwazilinearyzacji dla układów równań różniczkowych z parametrami.
Generation of large finite-element matrices on multiple graphics processors
- Adam Dziekoński
- Piotr Sypek
- Adam Lamęcki
- Michał Mrozowski
2013 INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
This paper presents techniques for generating very large finite-element matrices on a multicore workstation equipped with several graphics processing units (GPUs). To overcome the low memory size limitation of the GPUs, and at the same time to accelerate the generation process, we propose to generate the large sparse linear systems arising in finite-element analysis in an iterative manner on several GPUs and to use the graphics accelerators concurrently with CPUs performing collection and addition of the matrix fragments using a fast multithreaded procedure. The scheduling of the threads is organized in such a way that the CPU operations do not affect the performance of the process, and the GPUs are idle only when data are being transferred from GPU to CPU. This approach is verified on two workstations: the first consists of two 6-core Intel Xeon X5690 processors with two Fermi GPUs: each GPU is a GeForce GTX 590 with two graphics processors and 1.5GB of fast RAM; the second workstation is equipped with two Tesla C2075 boards carrying 6GB of RAM each and two 12-core Opteron 6174s. For the latter setup, we demonstrate the fast generation of sparse finite-element matrices as large as 10 million unknowns, with over 1 billion nonzero entries.Comparing with the single-threaded and multithreaded CPU implementations, the GPU-based version of the algorithm based on the ideas presented in this paper reduces the finite-element matrix-generation time in double precision by factors of 100 and 30, respectively. Copyright (c) 2012 John Wiley & Sons, Ltd.
Genetic Programming with Negative Selection for Volunteer Computing System Optimization
- Jerzy Balicki
- Waldemar Korłub
- Henryk Krawczyk
- Jacek Paluszak
2013
Volunteer computing systems like BOINC or Comcute are strongly supported by a great number of volunteers who contribute resources of their computers via the Web. So, the high efficiency of such grid system is required, and that is why we have formulated a multi-criterion optimization problem for a volunteer grid system design. In that dilemma, both the cost of the host system and workload of a bottleneck host are minimized. On the other hand, areliability of this grid structure is maximized. Moreover, genetic programming has been applied to determine the Pareto solutions. Finally, a negative selection procedure to handle constraints has been discussed.
Genotyping of clinical isolates of fluconazole-resistant Candida albicans
- Piotr Szweda
- Katarzyna Magdalena Gucwa
- Ewa Romanowska
- Katarzyna Dzierżanowska-Fangrat
- Sławomir Milewski
2013
The aim of the study was to compare the discriminatory power of RAPD-PCR method with using RSD10 primer and microsatellite analysis with using (GACA)4 primer for genotyping clinical isolates of fluconazole-resistant C. albicans. Isolates were received from patients of Children's Memorial Health Institute in Warsaw. However in the case of both tested methods low number of amplified fragments was generated, nine and six different genotypes were distinguished from microsatellite analysis and RAPD-PCR respectively. An evident increase in the number of generated amplicons was achieved when PCR amplification was performed with both primers simultaneously. Surprisingly, such increase did not resulted in better discriminatory power. Only six different genotypes were distinguished, and 31 out of 44 (70%) strains tested were classified as one genotype.
GeoSPAR Project. Validation and selection methods of geoinformation analysis using GIS for ranking and forecasting of terrorist threats and criminal events
- Andrzej Stepnowski
- Marek Moszyński
- Florian Romanowski
- Adam Augustynowicz
- Eugeniusz Kozaczka
- Tomasz Szubrycht
- Krzysztof Ligęza
2013 Full text HYDROACOUSTICS
The paper presents the description of work activities which have already been done within the first two stages – WorkPackage 1 and WorkPackage 2 - of the GeoSPAR Project. In such a context the general conceptual design of the GIS system and associate web service was presented and analysed. In addition, the operational and technical requirements for the GeoSPAR system have been specified and discussed; with special emphasis on system applications, including both the detection and monitoring of hazardous events along with their simulation and possible outcomes. In particular, the requirements and specification with reference to various sensors and data sources were formulated, these include: airborne data sources, remote sensing satellite data sources and ground-based data sources.
Geotechnical Aspects of Dike Construction Using Soil-Ash Composites
- Zbigniew Sikora
- Rafał Ossowski
2013 Full text Procedia Engineering
An analysis of using of anthropogenic materials, mainly ashes from Coal Combustion Products (CCP), for dike construction is shown. Perspectives of anthropogenic materials application in geotechnical engineering and their advantages in sense of the carbon dioxide reduction are discussed. According to regulations of Kioto Protocol 2005 and EU agreement “Energy Roadmap 2050” recycled materials have higher usage priority than natural ones. General remarks about constructions using soil-ash composites are given with discussion about their properties and laboratory investigation. Finally the full-scale experiment within the DREDGDIKES Project (www.dredgdikes.eu) is described, which is focused on the new technology with the usage of dredged and anthropogenic materials for construction of dikes.
Gesture-controlled Sound Mixing System With a Sonified Interface
- Michał Lech
- Bożena Kostek
2013
In this paper the Authors present a novel approach to sound mixing. It is materialized in a system that enables to mix sound with hand gestures recognized in a video stream. The system has been developed in such a way that mixing operations can be performed both with or without visual support. To check the hypothesis that the mixing process needs only an auditory display, the influence of audio information visualization on sound mixing and the ergonomics of the system usage in comparison to a mouse and keyboard interface are tested and the results of this study are presented.
GIS for processing multidimensional marine data in SAAS model
- Krzysztof Drypczewski
- Bartosz Wiśniewski
- Marcin Kulawiak
- Krzysztof Bruniecki
2013 Full text HYDROACOUSTICS
Geographic Information Systems (GIS) have always been a useful tool for visualization and processing of geospatial data. However, their capabilities of analysis non-standard information such as hydroacoustic soundings has thus far been very limited. This paper proposes a general-purpose GIS which uses techniques such as OLAP, WCS and WCPS for processing of multidimensional spatio-temporal data. The versatility of the GIS is exemplified by performing a set of analysis operations on a time series of soundings collected via a multibeam echosounder.
GIS Solution for Weather Forecast Data Analysis
- Krzysztof Drypczewski
- Łukasz Markiewicz
2013
In this paper authors present the GIS system for the analysis of the numerical weather prediction data. This kind of data has multidimensional character (three dimensions and time) and its analysis should consider all the available factors. Proposed GIS system consists of RASDAMAN application with implemented OLAP cube mechanism, which enables the user to process data in the spatial-time domain. It also simplifies the meteorological data division into specific geographic and temporal ranges.
Globalisation and world economic poverty: The significance of hidden dimensions
- Hanna Adamkiewicz
2013 Full text Metody Ilościowe w Badaniach Ekonomicznych
The aim of our research is to examine how individual dimensions of globalization affect economic poverty in the World. for this, regression models are estimated with FGT0 or FGT1 poverty measures as dependent variables and KOF indices of globalization as despendent variables. The poverty indices are estimated for 119 countries' income didtributions assuming log-normality and using Gini estimates from the WID2 database and GDP/capita from The World Bank database for the years 1990-2005. It has turned out that the"partial" impact of selected dimension of globalization on poverty is either linear or nonlinear, ceteris paribus. The nonlinear impact is of the U-shaped from or the inverted U-sheaped from. Our results contradict some typical"linear" findings when poverty measures are regressed only on one dimension of globalization. In other words, when some crucial dimensionsof globalization are neglected in regression analysis the conclusions about impact of globalization on world poverty could be misleading.
Glosa do decyzji Piątej Izby z 13.III.2012 w sprawie Bouygues Telecom p. Francji, skarga nr 2323/08
- Krystyna Kowalik-Bańczyk
2013 Państwo i Prawo
.....