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Gdańsk University of Technology

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Publications from the year 2016

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  • Możliwości wykorzystania systemu TRISTAR do badania wpływu warunków atmosferycznych na ruch drogowy.
    • Jacek Oskarbski
    • Marcin Zawisza
    • Karol Żarski
    2016 Full text PRACE NAUKOWE POLITECHNIKI WARSZAWSKIEJ. SERIA: TRANSPORT

    Efektywność systemów transportowych jest niezbędna do prawidłowego funkcjonowania aglomeracji miejskich. Niezawodny, bezpieczny i ekologiczny transport przyczynia się do podnoszenia konkurencyjności obszarów aglomeracyjnych poprzez zwiększenie ich atrakcyjności oraz poprawę jakości życia mieszkańców. Jednym z elementów mających znaczący wpływ na poziom niezawodności i sprawność systemów transportowych mają warunki atmosferyczne. Wystąpienie niekorzystnych warunków pogodowych może wpływać na obniżenie poziomu niezawodności systemu transportowego. Warunki atmosferyczne mają znaczący wpływ na zachowania kierowców w ruchu ulicznym. W niniejszym artykule przedstawiono wyniki badań dotyczących wpływu warunków pogodowych na parametry ruchu drogowego oraz możliwość wykorzystania Zintegrowanego Systemu Zarządzania Ruchem TRISTAR, jako stanowiska badawczego dla analiz wpływu warunków pogodowych na ruch drogowy w warunkach miejskich.

  • Możliwości wykorzystania technik membranowych UF/RO do odzysku wody technologicznej ze ścieków browarniczych
    • Jakub Drewnowski
    • Jan Marjanowski
    2016 Przemysł Fermentacyjny i Owocowo-Warzywny

    Przedstawiono możliwości zastosowania technik membranowych - ultrafiltracji (UF) i odwróconej osmozy (RO) - do odzysku wody technologicznej z powstających ścieków browarniczych. Nadawę dla procesu UF/RO stanowiły ścieki podczyszczone w procesie BIOPAQ-IC. Ścieki surowe, po uprzednim uśrednieniu parametrów, poddane były fermentacji w reaktorze beztlenowym, a następnie utleniane w zbiorniku doczyszczającym w celu pozbawienia zapachów i utlenieniu siarczków do siarczanów. Woda odzyskana ze ścieków podczyszczonych, w wyniku zastosowania technik membranowych UF i RO, mogłaby być wykorzystana do zasilania kotłów, układu chłodzenia oraz do procesów mycia technologicznego, poza myciem bezpośrednim butelek do piwa. W badaniach wykorzystano ultrafiltracyjny moduł kapilarny zanurzeniowy ZeeWeed pracujący w podciśnieniu i odwróconą osmozę wyposażoną w membranę osmotyczną Filmtec XLE 2125. Zastosowanie tego rozwiązania korzystnie wpływało na efektywność usuwania zanieczyszczeń, pozwalając uzyskać wodę oczyszczoną wysokiej jakości.

  • Możliwości zastosowania zasobnikowych jednostek trakcyjnych na liniach kolejowych na przykładzie Pomorskiej Kolei Metropolitalnej
    • Natalia Karkosińska-Brzozowska
    2016 Full text Problemy Kolejnictwa

    W artykule zwrócono uwagę, że zasobniki stosowane głównie do rekuperacji energii, mogą być również wykorzystane do zasilania pociągów na niezelektryfikowanych i zelektryfikowanych odcinkach linii kolejowych. Innowacyjność tego rozwiązania wykazano na podstawie dwóch aplikacji kolejowych elektrycznych zasobnikowych jednostek trakcyjnych: pierwszej funkcjonującej od 2014 roku na linii Utsunomiya – Karasuyama w Japonii oraz drugiej, testowanej w Wielkiej Brytanii o nazwie IPEMU (ang. Independently Powered Electric Multiple-Unit). Przedstawiono przykłady nowoczesnych zasobników energii oraz funkcjonujących elektrycznych zasobnikowych jednostek trakcyjnych. Wykazano celowość analizy możliwości ich zastosowania na linii Pomorskiej Kolei Metropolitalnej. Przedstawiono wyniki studium, w którym stwierdzono, że rozwiązanie to może być alternatywą dla napowietrznej sieci trakcyjnej. Przy doborze zasobnika energii wskazano parametry superkondensatorów, które mogą stanowić barierę w ich zastosowaniu oraz porównano je do parametrów nowoczesnych akumulatorów elektrochemicznych. Otrzymane wyniki oraz szybko rozwijająca się technologia magazynowania energii wskazują na potrzebę wykonania dalszych badań w celu znalezienia najbardziej efektywnych rozwiązań, szczególnie, zwłaszcza że wciąż testowane są nowe zasobniki energii. Wydaje się, że dalsze badania nad doborem rodzaju zasobników oraz nad efektywnością ekonomiczną spowodują, że wykorzystanie elektrycznych autonomicznych jednostek trakcyjnych może stać się przyszłościową technologią dla krótkich odcinków linii kolejowych przewidzianych do elektryfikacji.

  • MSRL 2.0. as a new method for research education on urban issues
    • Sławomir Ledwoń
    • Hanna Obracht-Prondzyńska
    2016

    The MSRL 2.0. research is focused on the Baltic Sea Region (BSR) as a multidimensional urban phenomenon with Gdansk acting as a hub for the research teams. The idea of the MSRL 2.0. is to promote the collaboration of professionals and graduate and PhD students by bringing together the mentor(s) with a local research team sharing experiences and proposing strategic recommendations to strengthen sustainable urban development initiatives for BSR at the international, regional and local levels.

  • MSRL and the Real-Life Processes of Capturing and Implementing the "Urban Innovation"
    • Łukasz Pancewicz
    • Tomasz Rozwadowski
    2016

    Result of the MSRL workshop, five research projects, reflect on a broader process of exchange of the ideas between the cities, that is occurring in the real life and became one of the driving factors of the urban development nowadays. The objective of the MSRL research - concepts, which help to advance the development of the cities, support the improvement of the quality of urban environment or meet the future challenges, can be called as “the urban innovations”1. Identifying them and effective implementation is critical for ability to attract and retain highly-qualified work force and building the quality of urban life. There are at least two factors that help to understand how such city improving concepts are “travelling” and are implemented by the cities. The first point of reference are the regional linkages and networks, which built the environment in which the innovations are exchanged. The others are the actual mechanisms of exchange via building the local capacity of the cities through learning, testing and disseminating. In all cases, the cities are the focus of the research as they play major role in being a testing ground for the new ideas. Both of them were identified by the MSRL teams and utilized in their research. In all cases, the research also demanded from the practitioners to leave their “comfort zone” and explore the concepts which are not architectural or urban design in nature but are only loosely associated with the urban phenomenon.

  • Multiaspect measurement analysis of breaking energy recovery
    • Mikołaj Bartłomiejczyk
    • Marcin Połom
    2016 Full text ENERGY CONVERSION AND MANAGEMENT

    Nowadays the issue of electric energy saving in public transport is becoming a key area of interest, which is connected both with a growth of environmental awareness in the society and an increase in the prices of fuel and electricity. That is why the reduction of energy consumption by increasing electrified urban transport, such as trams, trolleybuses, light rail and underground is becoming an increasingly important issue. Energy recovery during braking is possible in all modern electric vehicles, but in many cases this possibility is not fully taken advantage of, inter alia, because of an inadequate power supply structure. The aim of this article is to present practical examples of implementation of eco-friendly solutions in urban municipal transport. The article shows a thorough analysis of braking energy dispatch in the urban traction power supply system, which was based on extensive measurement research conducted in Gdynia trolleybus network. The authors applied multi way measurement method using Global Positioning System. The optimal conditions for implementation of several methods of energy recovery (storage energy systems, reconfiguration of supply system, using auxiliaries) have been shown. Great emphasis has been put on the confirmation of the results by means of research and experimental measurement.

  • Multichannel Human Body Communication
    • Piotr Przystup
    • Adam Bujnowski
    • Jerzy Wtorek
    2016

    Human Body Communication is an attractive alternative for traditional wireless communication (Bluetooth, ZigBee) in case of Body Sensor Networks. Low power, high data rates and data security makes it ideal solution for medical applications. In this paper, signal attenuation for different frequencies, using FR4 electrodes, has been investigated. Performance of single and multichannel transmission with frequency modulation of analog signal has been tested. Experiment results show that HBC is a feasible solution for transmitting data between BSN nodes.

  • Multi-criteria Robot Selection Problem for an Automated Single-Sided Lapping System
    • Norbert Piotrowski
    • Adam Barylski
    2016

    Flat lapping is a crucial process in a number of precision manufacturing technologies. Its aim is to achieve extremely high flatness of the workpiece. Single-sided lapping machines have usually standard kinematic systems and are used in conjunction with conditioning rings, which are set properly be-tween the center and the periphery of the lapping plate. In this paper, instead of conventional single-side lapping machine, an automated lapping cell is in-troduced. An object of the idea of robotic lapping system is to provide improved means for controlling the position of conditioning rings on lapping plate, so as to enable the flatness of the plate and consequently of the workpieces to be controlled. What is more, this innovative solution allows to fully automate a single-disc lapping process. Selection of a robot is one of a number of challenges in designing automated manufacturing systems. This problem has become more demanding due to increasing specifications and complexity of the robots. This study aims to solve a robot selection difficulty for condition-ing ring positioning, workpieces handling and loading tasks in the lapping cell. For this reason, Analytic Hierarchy Process (AHP), which is one of the Multi-Criteria Decision Making method is used to select the most convenient robot.

  • Multicultural coastal cities: what are the differences in culture of urban planning management. Comparison analysis of Gdańsk and Gdynia
    • Irina Shmeleva
    • Małgorzata Łosiewicz
    • Edyta Skiba
    • Alicja Stefańska
    • Przemysław Wróbel
    • Martyna Agnieszka Ceglińska
    • Katarzyna Kupczyk
    • Agnieszka Chromiec
    • Adrianna Bielecka
    • Magdalena Derdowska
    • Ilirjana Haxhiaj
    • Natalia Szczygieł
    2016

    The goal of this book chapter is the analysis of the multiculturalism of the seaside cities (Gdansk and Gdynia). We define multiculturalism by ethnic aspects, as concentration of multiple nationalities and ethnic groups over the given area and non ethnic aspects, as occurrence of multiple symbols, signs or cultures. We sense multiculturalism of the cities through the cultural and social properties of the citizens and urban architecture. The cities become diverse not only in the material but also in the symbolic area, they are spaces were strangers live beside each other. Its foundation is mostly the migration phenomenon which favours the transfer of the cultural standards (displayed not only in language and values but also in the attire or lifestyle). It should not be forgotten it is expressed also in the architecture (objectifies cultural diversity in urban area). The aim of publication is to distinguish the differences and similarities in culture of urban planning management in Gdansk and Gdynia by using criteria from good governance idea (participation, answering to needs of citizens, responsibility, equality and inclusion). The purpose is to find good practices, elements of multicultural policies in cities under consideration and defining its character. The analysis is conducted in three areas: cultural, social and architectural by using different research methods: desk research, index of participation, self-completion questionnaires and behavioural mapping. We can observe that despite the cultural variety and tradition that is a repercussion of the history of the cities, it is more and more challenging to obtain idealistic cohesion of the city. A lot is being done in the field of celebration the differences and providing knowledge about approaches of various cultures. However, a lot must be done in the area of introducing new facilitations to provide the access to information and space for everyone.

  • Multifunctional PID Neuro-Controller for Synchronous Generator
    • Hocine Tiliouine
    2016 Full text International Journal of Engineering and Technologies

    This paper deals with a PID Neuro-Controller (PIDNC) for synchronous generator system. The controller is based on artificial neural network and adaptive control strategy. It ensures two functions: maintaining the generator voltage at its desired value and damping electromechanical oscillations. The performance of the proposed controller is evaluated on the basis of simulation tests. A comparative study of the results obtained with PIDNC and those with conventional PID was performed.

  • Multi-level Virtualization and Its Impact on System Performance in Cloud Computing
    • Paweł Lubomski
    • Andrzej Kalinowski
    • Henryk Krawczyk
    2016 Full text Communications in Computer and Information Science

    The results of benchmarking tests of multi-level virtualized environments are presented. There is analysed the performance impact of hardware virtualization, container-type isolation and programming level abstraction. The comparison is made on the basis of a proposed score metric that allows you to compare different aspects of performance. There is general performance (CPU and memory), networking, disk operations and application-like load taken into account. The tested technologies are, inter alia, VMware ESXi, Docker and Oracle JVM.

  • Multimedia distributed system for visualization of ongoing and archival events for BG
    • Marek Blok
    • Bartosz Czaplewski
    • Sylwester Kaczmarek
    • Magdalena Młynarczuk
    • Marcin Narloch
    • Maciej Sac
    2016

    The paper presents concept of the distributed system designed to gather and provide the information about vehicles, vessels and airplanes present within the area of operations of the Border Guard supplemented with related multimedia. The part of the system related to the map data gathering, distribution and visualization has been already implemented in the preceding project. The presented system is the expansion of the previous system and introduces new multimedia related functionalities such as presentation of current or archival map data along with telephone connection and video streams from cameras operating within the area of interest.

  • Multimedia polysensory integration training system dedicated to children with educational difficulties
    • Michał Lech
    • Bożena Kostek
    • Andrzej Czyżewski
    2016 Full text JOURNAL OF INTELLIGENT INFORMATION SYSTEMS

    This paper aims at presenting a multimedia system providing polysensory train- ing for pupils with educational difficulties. The particularly interesting aspect of the system lies in the sonic interaction with image projection in which sounds generated lead to stim- ulation of a particular part of the human brain. The system architecture, video processing methods, therapeutic exercises and guidelines for children’s interaction with the system are presented. Results of pupils’ improvements after several weeks of exercising with the sys- tem are provided. The outcome of this study suggests that learning and developing through the interactive method helped to improve children’s spatial orientation skills.

  • Multimodal Attention Stimulator
    • Andrzej Czyżewski
    • Bożena Kostek
    • Łukasz Kosikowski
    2016 LECTURE NOTES IN COMPUTER SCIENCE

    Multimodal attention stimulator was proposed and tested for improving auditory and visual attention, including pupils with developmental dyslexia. Results of the conducted experiments shown that the designed stimulator can be used in order to improve comprehension during reading tasks. The changes in the visual attention, observed in reading test results, translate into the overall reading performance.

  • Multimodalne stanowisko do polisensorycznej diagnozy i stymulacji osób z zaburzeniami komunikacji
    • Andrzej Czyżewski
    • Adam Korzeniewski
    • Piotr Odya
    • Piotr Szczuko
    • Rafal Kupniewski
    2016

    Celem komunikatu plakatowego jest prezentacja eksperymentalnego zintegrowanego systemu multimodalnego, przeznaczonego do wykorzystania w diagnozowaniu i stymulacji polisensorycznej osób niekomunikujących się, w szczególności osób z ciężkimi urazami mózgu. Interfejs użytkownika wykorzystuje śledzenie wzroku i monitorowanie elektroencefalograficzne. Ponadto elementami tego stanowiska są: emiter bodźców zapachowych oraz urządzenie do obiektywnych badań słuchu, a także system projekcji autostereoskopowej przeznaczony do stymulowania osób poprzez ich zanurzanie w otoczeniu wirtualnym. Zaprezentowane zostaną rozwiązania multimodalnej akwizycji i analizy pozyskiwanych danych do celu oceny wpływu stymulacji na poprawę funkcji kognitywnych i zdolności komunikacyjnych. Ocena zdolności komunikacyjnych z zastosowaniem opracowanego systemu jest prowadzona w wiodących w skali kraju placówkach opieki długoterminowej nad pacjentami po urazach mózgowych, w którymi nawiązano współpracę.

  • Multi-nodal PWR reactor model — Methodology proposition for power distribution coefficients calculation
    • Bartosz Puchalski
    • Tomasz Adam Rutkowski
    • Kazimierz Duzinkiewicz
    2016

    In the paper the multi-nodal Pressurized Water Reactor (PWR) model called Mann’s model is presented. This models is used for modelling purposes of the heat transfer from fuel to coolant in reactor core. The authors expand widely used in literature approach by defining additional coefficients for the heat transfer model. These parameters approximate the power generation distribution in the PWR reactor core according to the to the reactor control rod bank movement. Authors describe in details proposed methodology for calculation of introduced power distribution coefficients. In the simplest case those coefficients may be equal and constant over time and space of reactor. On the other hand they can be treated as variables that are time and reactor region dependent. By introducing these specific coefficients nodal model of heat transfer gains advanced capabilities that can be efficiently used in design and synthesis of more advanced power control system in nuclear reactor with respect to temperature distribution within the reactor core.

  • Multiobjective Aerodynamic Optimization by Variable-Fidelity Models and Response Surface Surrogates
    • Leifur Leifsson
    • Sławomir Kozieł
    • Yonatan Tesfahunegn
    2016 AIAA JOURNAL

    A computationally efficient procedure for multiobjective design optimization with variable-fidelity models and response surface surrogates is presented. The proposed approach uses the multiobjective evolutionary algorithm that works with a fast surrogate model, obtained with kriging interpolation of the low-fidelity model data enhanced by space-mapping correction exploiting a few high-fidelity training points. The initial Pareto front generated by multiobjective optimization of the surrogate using the multiobjective evolutionary algorithm can be iteratively refined by local enhancements of the surrogate model. The latter are realized with a space-mapping response correction based on a limited number of high-fidelity training points allocated along the initial Pareto front. The proposed method allows us to obtain, at a low computational cost, a set of designs representing tradeoffs between the conflicting objectives. The current approach is illustrated using examples of airfoil design: one in transonic flow, involving aerodynamics tradeoffs; and another one in low-speed flow, involving tradeoffs between the aerodynamic and the aeroacoustic performances.

  • Multi-objective antenna design by means of sequential domain patching
    • Sławomir Kozieł
    • Adrian Bekasiewicz
    2016 IEEE Antennas and Wireless Propagation Letters

    A simple yet robust methodology for rapid multiobjective design optimization of antenna structures has been presented. The key component of our approach is sequential domain patching of the design space which is a stencil-based search that aims at creating a path that connects the extreme Pareto-optimal designs, obtained by means of single-objective optimization runs. The patching process yields the initial approximation of the Pareto set representing the best possible trade-offs between conflicting design objectives. It is realized—for the sake of computational efficiency— at the level of coarse-discretization EM simulation model. The final Pareto front is subsequently obtained using surrogate-assisted optimization where the EM simulation data acquired at the initial design stage is reused. The proposed methodology is demonstrated using two examples of ultra-wideband monopole antennas.

  • Multi-objective optimization of compact UWB impedance matching transformers using Pareto front exploration and adjoint sensitivities
    • Sławomir Kozieł
    • Adrian Bekasiewicz
    • Qingsha Cheng
    2016

    In this paper, a technique for fast multi-objective optimization of impedance matching transformers has been presented. In our approach, a set of alternative designs that represent the best possible trade-offs between conflicting objectives (here, the maximum reflection level within a frequency band of interest and the circuit size) is identified by directly exploring the Pareto front. More specifically, the subsequent Pareto-optimal design is obtained by local optimization starting from the previously found solution. Low cost of the design optimization process is ensured by exploiting cheap adjoint sensitivities. The proposed technique is demonstrated using an example of three-section transformer matching the 50 Ohm source to the 130 Ohm load and working in 3.1-to-10.6 GHz range. For this example, 16-element representation of the Pareto set is obtained at the cost of just 60 evaluations of the full-wave EM simulation model of the transformer structure.

  • Multi-objective optimization of expensive electromagnetic simulation models
    • Sławomir Kozieł
    • Adrian Bekasiewicz
    2016 APPLIED SOFT COMPUTING

    Vast majority of practical engineering design problems require simultaneous handling of several criteria. For the sake of simplicity and through a priori preference articulation one can turn many design tasks into single-objective problems that can be handled using conventional numerical optimization routines. However, in some situations, acquiring comprehensive knowledge about the system at hand, in particular, about possible trade-offs between conflicting objectives may be necessary. This calls for multi-objective optimization that aims at identifying a set of alternative, Pareto-optimal designs. The most popular solution approaches include population-based metaheuristics. Unfortunately, such methods are not practical for problems involving expensive computational models. This is particularly the case for microwave and antenna engineering where design reliability requires utilization of CPU-intensive electromagnetic (EM) analysis. In this work, we discuss methodologies for expedited multi-objective design optimization of expensive EM simulation models. The solution approaches that we present here rely on surrogate-based optimization (SBO) paradigm, where the design speedup is obtained by shifting the optimization burden into a cheap replacement model (the surrogate). The latter is utilized for generating the initial approximation of the Pareto front representation as well as further front refinement (to elevate it to the high-fidelity EM simulation model level). We demonstrate several application case studies, including a wideband matching transformer, a dielectric resonator antenna and an ultra-wideband monopole antenna. Dimensionality of the design spaces in the considered examples vary from six to fifteen, and the design optimization cost is about one hundred of high-fidelity EM simulations of the respective structure, which is extremely low given the problem complexity.