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Gdańsk University of Technology

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Publications from the year 2015

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  • MARKAL LONG-TERM POWER GENERATION SCENARIOS FOR POLAND: INCREASING THE SHARE OF RENEWABLE ENERGY SOURCES BY 2040
    • Marcin Jaskólski
    • Paweł Bućko
    2015

    In this paper, renewable energy sources (RES) support mechanisms in Poland was presented with perspectives of proposed support system modifications, discussed in the project of Renewable Energy Act. In addition, MARKAL model of RES support mechanism was presented, taking into account technology-specific multiplication factors. Two model runs with emission trading system in place and two additional runs without emission trade were performed. The latter runs were analyzed in view of the 40% target for Poland by 2040 (renewable electricity share in final consumption) with emphasis on investments in renewable technology options and potential costs of support systems.

  • Marketing a społeczna odpowiedzialność biznesu – sprzeczne idee?
    • Anna Drapińska
    2015 Full text Marketing i Zarządzanie

    Negatywny wizerunek marketingu postrzeganego jako koncepcja kreująca nowe potrzeby i nakłaniająca klientów do zwiększania konsumpcji spowodował, że marketing wydaje się być sprzeczny z ideą rozwoju zrównoważonego i społecznej odpowiedzialności biznesu. W artykule przedstawiono rozważania czy rzeczywiście tak jest i czy stosowanie działań marketingowych jest rozbieżne z celami rozwoju zrównoważonego . Stwierdzono, że realizowanie przez przedsiębiorstwa społecznej odpowiedzialności biznesu nie jest sprzeczne z jednoczesnym podejmowaniem działań marketingowych, a marketing nie jest sprzeczny z koncepcją CSR. Zaakcentowano, że zadaniem marketingu jest działanie zgodne z interesem przedsiębiorstw, na rzecz dobra klienta i całego społeczeństwa. Można więc stwierdzić, że omawiane koncepcje mają wiele obszarów wspólnych i mogą być realizowane jednocześnie, wzajemnie się uzupełniając.

  • Massive surveillance data processing with supercomputing cluster
    • Andrzej Czyżewski
    • Piotr Bratoszewski
    • Andrzej Ciarkowski
    • Janusz Cichowski
    • Karol Lisowski
    • Maciej Szczodrak
    • Grzegorz Szwoch
    • Henryk Krawczyk
    2015 Full text INFORMATION SCIENCES

    In recent years, increasingly complex algorithms for automated analysis of surveillance data are being developed. The rapid growth in the number of monitoring installations and higher expectations of the quality parameters of the captured data result in an enormous computational cost of analyzing the massive volume of data. In this paper a new model of online processing of surveillance data streams is proposed, which assumes the use of services running within a supercomputer platform. The study presents some of the highly parallelized algorithms for detecting safety-threatening events in high-resolution- video streams, which were developed during the research, and discusses their performance on the supercomputer platform.

  • Maszyny rozdmuchowe stosowane do wytwarzaniu butelek z PET
    • Paweł Wawrzyniak
    • Janusz Datta
    2015 Przemysł Chemiczny

    Scharakteryzowano maszyny wykorzystywane w procesie wytwarzania pojemników PET w procesie rozdmuchiwania z jednoczesnym rozciąganiem półfabrykatów w postaci preform. Omówiono typy, budowę oraz systemy i podsystemy, producentów oraz cykl pracy maszyny rozdmuchowej. Nie omówiono szczegółowo wytwarzania półfabrykatów do postaci preform w procesie wtryskiwania.

  • Matching trajectory of a person to a map in inertial navigation system
    • Jarosław Magiera
    2015 Zeszyty Naukowe Akademii Marynarki Wojennej

    Paper describes the method of matching, to a map, trajectories of a person walking indoors, obtained from inertial navigation module. General principle of matching algorithm based on particle filtering is presented. Method of detecting particle collisions is described as well. The last chapter provides test results of map matching related to a true trajectory.

  • Materiały stosowane do wytwarzania implantów kości
    • Helena Janik
    • Michalina Mallach
    2015 Przemysł Chemiczny

    Materiały stosowane do wytwarzania implantów kostnych muszą być biokompatybilne, nietoksyczne, bioaktywne oraz wykazywać odpowiednie właściwości mechaniczne, takie jak wytrzymałość na ściskanie, na zginanie oraz sztywność i twardość. Gama stosowanych materiałów jest bardzo szeroka, obejmuje metale, polimery, ceramikę oraz ich kompozyty. Każdy z tych materiałów ma swoje mocne i słabe strony. Praca stanowi przegląd materiałów stosowanych do wytwarzania implantów kości, ze szczególnym uwzględnieniem oferty rynku polskiego.

  • Materiały termoelektryczne – obecny stan wiedzy oraz nowe perspektywy
    • Beata Bochentyn
    2015

    W niniejszej pracy opisano podstawowe parametry determinujące przydatność danego materiału do zastosowań w urządzeniach termoelektrycznych. Opisano założenia teoretyczne, jakie powinien spełniać potencjalnie dobry materiał termoelektryczny oraz zaprezentowano materiały współcześnie charakteryzujące się najlepszym parametrem dobroci. Nakreślono również ideę nowego sposobu otrzymywania materiałów termoelektrycznych z częściowo lub całkowicie skrystalizowanych materiałów tlenkowych.

  • Materiały zmiennofazowe do stabilizowania temperatury nawierzchni asfaltowych
    • Patrycja Wcisło-Kucharek
    • Michał Ryms
    • Witold Lewandowski
    • Ewa Klugmann-Radziemska
    2015 Drogownictwo

    W artykule przedstawiono możliwość wykorzystania lekkiego kruszywa budowlanego modyfikowanego materiałem zmiennofazowym (PCM), jako dodatku do nawierzchni asfaltowej, w celu zwiększenia jej stabilności termicznej przy zachowaniu dotychczasowych właściwości mechanicznych. Cel ten może zostać osiągnięty przez nasączenie porowatych granulek lekkiego kruszywa odpowiednim materiałem zmiennofazowym, co umożliwi magazynowanie określonych ilości ciepła. Dzięki użyciu odpowiedniej ilości materiału PCM można stabilizować temperaturę nawierzchni asfaltowej na określonym poziomie. Przeprowadzono analizę termiczną wybranego materiału PCM (cerezyna) oraz zmodyfikowanego kruszywa (np. keramzyt, pollytag) za pomocą różnicowej kalorymetrii skaningowej (DSC). Dzięki tej metodzie określono najważniejsze parametry termofizyczne tych materiałów.

  • Materiały źródłowe dla kanalizacji
    • Ziemowit Suligowski
    2015

    Warunki projektowania oraz funkcjonowania kanalizacji oraz rozwiązania materiałowe ulegają szybkim zmianom. Równocześnie zmieniają się wymagania w stosunku do wykonawstwa. Znaczna część piśmiennictwa nie odpowiada aktualnym wymaganiom. Przedstawiono wykaz podstawowych aktualnych prac z zakresu kanalizacji.

  • Mathematical model of pennate muscle
    • Wiktoria Wojnicz
    • Bartłomiej Zagrodny
    • Michał Ludwicki
    • Jan Awrejcewicz
    • Edmund Wittbrodt
    2015

    The purpose of this study is to create a new mathematical model of pennate striated skeletal muscle. This new model describes behaviour of isolated flat pennate muscle in two dimensions (2D) by taking into account that rheological properties of muscle fibres depend on their planar arrangement. A new mathematical model is implemented in two types: 1) numerical model of unipennate muscle (unipennate model); 2) numerical model of bipennate muscle (bipennate model). Applying similar boundary conditions and similar load, proposed numerical models had been tested. Obtained results were compared with results of numerical researches by applying a Hill-Zajac muscle model (this is a Hill type muscle model, in which the angle of pennation is taken into consideration) and a fusiform muscle model (a muscle is treated as a structure composed of serially linked different mechanical properties parts).

  • Mathematical modelling of implant in an operated hernia for estimation of the repair persistence
    • Izabela Lubowiecka
    2015 COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING

    This paper presents mathematical modelling of an implanted surgical mesh used in the repair process of the abdominal hernia. The synthetic implant is simulated by a membrane structure. The author provides a material modelling of the implant based on the dense net model appropriate for technical fabrics. The accuracy of the proposed solution is evaluated by comparing the simulations of the dynamic behaviour of the system with the experiments carried out on physical models of implanted mesh. The model can be used to estimate the repair persistence for different mesh materials, fixing systems and different numbers of tacks to be provided during the surgery in order to resist the cough pressure and required action to avoid hernia recurrence. The persistence of the repaired hernia is assessed on the basis of the values of the forces in the tissue–implant joints because the usual form of the repair failure is due to as the joint disconnection or tissue failure.

  • Matrix-based robust joint fingerprinting and decryption method for multicast distribution of multimedia
    • Bartosz Czaplewski
    • Roman Rykaczewski
    2015 SIGNAL PROCESSING

    This paper addresses the problem of unauthorized redistribution of multimedia content by malicious users (pirates). The solution proposed here is a new joint fingerprinting and decryption method which meets the requirements for both imperceptibility and robustness of fingerprints and scalability in terms of design and distribution of fingerprinted multimedia content. The proposed method uses a simple block cipher based on matrix multiplication to encrypt images which are then sent to all users via multicast transmission. Individual decryption keys are designed depending on the users’ fingerprints so that a different fingerprint will be introduced into the image during decryption for each unique decryption key. Encryption and fingerprinting are performed on DCT coefficients, which results in high robustness against compression, low-pass filtering, scaling, etc. The experimental results show that the proposed method is robust against collusion attacks and compression.

  • Mazowieckie Centrum Sztuki Współczesnej "Elektrownia"
    • Monika Arczyńska
    2015

    Tekst o Mazowieckim Centrum Sztuki Współczesnej "Elektrownia" w Radomiu

  • MEASUREMENT O F HEALTHCARE SYSTEM EFFICIENCY IN OECD COUNTRIES
    • Justyna Kujawska
    2015 Full text Metody Ilościowe w Badaniach Ekonomicznych

    Increased spending on healthcare systems in many countries tends to attract attention to their efficiency. The aim of this paper is to evaluate the efficiency of healthcare systems in the OECD countries and indicate causes of inefficiency by applying Data Envelopment Analysis (DEA) and using additive and super-efficiency models. The homogeneity of the sample is assessed and outliers are excluded. A ranking is established on the basis of efficiency scores. By means of DEA, fully efficient units are identified, forming a reference set (of best practice) for inefficient countries to follow.

  • Measurement of Coherence Bandwidth in UHF Radio Channels for Narrowband Networks
    • Jarosław Sadowski
    2015 Full text International Journal of Antennas and Propagation

    This paper presents results of investigation on the coherence bandwidth of narrowband radio channels in 430MHz band. The coherence bandwidth values were estimated froma power delay profile obtained by recording CDMA2000 forward channel signals during real-fieldmeasurements in various environments:mediumcity, flat terrain, and hilly terrain in northern Poland.The results of measurements are compared with characteristic parameters of UHF radio channel models defined for exemplary narrowband digital system from the TETRA standard. In all of the tested environments, the coherence bandwidth values during most of an observation time were much higher than 25 kHz.Therefore, the fading in tested UHF narrowband channels should be classified as flat fading.

  • Measurement of temperature at sliding polymer surface by grindable thermocouples
    • Oleksii Nosko
    • Takuo Nagamine
    • A. L. Nosko
    • A.m. Romashko
    • Hiroki Mori
    • Yuichi Sato
    2015 TRIBOLOGY INTERNATIONAL

    This paper is devoted to experimental study of capabilities and limitations of grindable thermocouples as applied to polymer materials sliding on metal. Chromel–alumel and chromel–copel grindable thermocouples have been developed and tested for wide ranges of contact pressure and sliding velocity. The background temperature of the sliding surface can be determined as the lower envelope of the signal from the grindable thermocouple. Steady and unsteady regimes of sliding have been investigated. For steady sliding, the accuracy of the temperature determination increases with measurement duration. In the case of unsteady sliding, accurate temperature determination requires multiple tests under the same conditions. The thickness of the thermocouple junction has been analyzed for correct comparison of experimental and calculated temperatures.

  • MEASUREMENT OF TEMPERATURE-DEPENDENT VISCOSITY AND THERMAL CONDUCTIVITY OF ALUMINA AND TITANIA THERMAL OIL NANOFLUIDS
    • Janusz Cieśliński
    • Katarzyna Ronewicz
    • Sławomir Smoleń
    2015 Full text Archives of Thermodynamics

    In this study results of simultaneous measurements of dynamic viscosity, thermal conductivity, electrical conductivity and pH of two nanofluids, i.e. thermal oil/Al2O3 and thermal oil/TiO2 are presented. Thermal oil is selected as a base liquid because of possible application in ORC systems as an intermediate heating agent. Nanoparticles were tested at the concentration of 0.1%, 1% and 5% by weight within temperature range from 20°C to 60 °C. Measurement devices were carefully calibrated by comparison obtained results for pure base liquid (thermal oil) with manufacturer’s data. The results obtained for tested nanofluids were compared with predictions made by use of existing models for liquid/solid particles mixtures

  • Measurements and Simulations of Engineered Ultrasound Loudspeakers
    • Piotr Bratoszewski
    • Janusz Cichowski
    • Andrzej Czyżewski
    2015 Computational Methods in Science and Technology

    Simulation and measurement results of the sound emitted from an ultrasound custom-made system with high spatial directivity are presented. The proposed system is using modulated ultrasound waves which demodulate in nonlinear medium resulting in audible sound. The system is aimed at enhancing the users’ personal audio space, therefore the measurements are performed using the Head and Torso Simulator which provides realistic reproduction of the human auditory system. Based on the measurements of the sound emitted from the two parametric arrays of ultrasonic transducers the directivity of the proposed system and the interaural crosstalk characteristics are determined. Application of the system concerns creating a personal audio space for users of mobile platforms, such as notebooks, and applying 3D audio algorithms without the need of using headphones.

  • Measurements and visualization of sound field distribution around organ pipe
    • Józef Kotus
    • Piotr Odya
    • Bożena Kostek
    2015

    Measurements and visualization of acoustic field around an organ pipe are presented. Sound intensity technique was applied for this purpose. Measurements were performed in free field. The organ pipe was activated with a constant air flow, produced by an external compressor, aimed at obtaining long-term steady state responses of generated acoustic signal. Sound energy distribution was measured in a defined fixed grid of points by means of multichannel acoustic vector sensor. For a precise positioning of the acoustic probe the specialized Cartesian robot was applied. Obtained results made it possible to produce visualizations of sound intensity distribution of radiated acoustic energy around the considered organ pipe.

  • Measurements and Visualization of Sound Intensity Around the Human Head in Free Field Using Acoustic Vector Sensor
    • Józef Kotus
    • Bożena Kostek
    2015 Full text JOURNAL OF THE AUDIO ENGINEERING SOCIETY

    This paper presents measurements and visualization of sound intensity around the human head simulator in a free field. A Cartesian robot, applied for precise positioning of the acoustic vector sensor, was used to measure sound intensity. Measurements were performed in a free field using a head and torso simulator and the setup consisting of four different loudspeaker configurations. The acoustic vector sensor was positioned around the head with a 5-cm step. Sound intensity was measured in 277 points. For every step, three orthogonal sound intensity components were calculated. Pure tones of frequencies: 250, 1000, and 4000 Hz were applied to analyze the acoustic field. Obtained results were used to provide visualizations of sound intensity distribution around the human head. The tool developed for this purpose utilized three-dimensional sound intensity measurements and visualization techniques.