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Politechniki Gdańskiej

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Publikacje z roku 2017

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  • Airborne Laser Scanning Point Cloud Update by Used of the Terrestrial Laser Scanning and the Low-Level Aerial Photogrammetry
    • Adam Inglot
    • Paweł Tysiąc
    2017 Pełny tekst

    Laser scanning technology is a spatial information gathering technique which is commonly used all over the world. Systems where the red-light beam are used, are divided into: terrestrial, mobile and airborne scanning systems. The main differences between those are the accuracy, the data acquisition solution (f. e. in ALS and MLS besides of the laser scanner, the inertial navigation system is required) and the covered area in one mission campaign. In addition to a type of the project, the systems could be used and merge as one to create precise, accurate 3D point model of the terrain without any gaps. The data which are provided need up to date. In this paper, authors presented the solution of densing the point cloud from the ALS by the use of terrestrial laser scanning system and low-level aerial photogrammetry to reduce the total costs of filling ALS point cloud.

  • Airfoil Design Under Uncertainty Using Non-Intrusive Polynomial Chaos Theory and Utility Functions
    • Xiaosong Du
    • Leifur Leifsson
    • Sławomir Kozieł
    • Adrian Bekasiewicz
    2017 Pełny tekst Procedia Computer Science

    Fast and accurate airfoil design under uncertainty using non-intrusive polynomial chaos (NIPC) expansions and utility functions is proposed. The NIPC expansions provide a means to efficiently and accurately compute statistical information for a given set of input variables with associated probability distribution. Utility functions provide a way to rigorously formulate the design problem. In this work, these two methods are integrated for the design of airfoil shapes under uncertainty. The proposed approach is illustrated on a numerical example of lift-constrained airfoil drag minimization in transonic viscous flow using the Mach number as an uncertain variable. The results show that compared with the standard problem formulation the proposed approach yields more robust designs. In other words, t he designs obtained by the proposed approach are less sensitive to variations in the uncertain variables than those obtained with the standard problem formulation.

  • Akaike's final prediction error criterion revisited
    • Maciej Niedźwiecki
    • Marcin Ciołek
    2017 Pełny tekst

    When local identification of a nonstationary ARX system is carried out, two important decisions must be taken. First, one should decide upon the number of estimated parameters, i.e., on the model order. Second, one should choose the appropriate estimation bandwidth, related to the (effective) number of input-output data samples that will be used for identification/ tracking purposes. Failure to make the right decisions results in the model deterioration, both in the quantitative and qualitative sense. In this paper, we show that both problems can be solved using the suitably modified Akaike’s final prediction error criterion. The proposed solution is next compared with another one, based on the Rissanen’s predictive least squares principle.

  • Akwarele z pleneru Architekci Malują w Gdańsku
    • Jacek Krenz
    2017

  • Akwarele z pleneru Architekci Malują w Sopocie
    • Jacek Krenz
    2017

  • Akwarele: Za murem 1944 Dulag 121, W parku
    • Jacek Krenz
    2017

    Katalog wystawy Stowarzyszenia Akwarelistów Polskich prezentuje prace 29 uczestników pleneru Akwareliści w Pruszkowie. Tematem prac są głównie krajobrazy miasta i pejzaże z jego okolic.

  • Algorytmy genetyczne i ewolucyjne
    • Marta Drosińska-Komor
    • Jerzy Głuch
    2017

    Algorytmy ewolucyjne istnieją dzięki wieloletnim obserwacją procesów zachodzących wśród żywych organizmów. Korzystają one z nazw i określeń występujących w genetyce np.: gen, chromosom. Algorytmy genetyczne oraz ewolucyjne używa się w procesach optymalizacyjnych w celu poszukiwania ekstremów.

  • Alternative Methods of Preparation of Soluble Keratin from Chicken Feathers
    • Izabela Sinkiewicz
    • Agata Sommer
    • Hanna Staroszczyk
    • Ilona Kołodziejska
    2017 Pełny tekst Waste and Biomass Valorization

    Huge amount of keratinous waste, especially birds’ feathers, demands more value-added application instead of dumping. The present work reports the results of experiments aimed at preparing soluble keratin useful for novel bioproduct formation. The effect of thermo-chemical treatments with various reducing agents, i.e. 2-mercaptoethanol, dithiothreitol, sodium m-bisulphite, and sodium bisulphite, as well as sodium hydroxide, on the yield of keratin extracted from chicken feathers was determined. It was shown that after 2-h reduction with 2-mercaptoethanol and sodium bisulphite, the yield of soluble keratin was about equal and amounted to 84 and 82 %, respectively. The cheaper and harmless sodium bisulphite additionally decreased the extraction time to 1 h with the same yield. Moreover, treatment of the feathers with 2.5 % NaOH further improved the extraction effectiveness by increasing the yield up to 94 %. The results of the study demonstrate the viability of hydrolytic processes to obtain soluble keratin useful for biodegradable film formation for food application, that are harmless and more effective than solubilization by reduction of the disulphide bonds.

  • Alternatywa dla elektryfikacji miejskiej linii kolejowej - elektryczne zasobnikowe jednostki trakcyjne
    • Natalia Karkosińska-Brzozowska
    2017

    Na linii kolejowej nr 248 eksploatowane są pojazdy o napędzie spalinowym, ocenianymi powszechnie jako nie ekologiczne, mało ekonomiczne, hałaśliwe, i o małym, w porównaniu do trakcyjnych pojazdów elektrycznych, przyśpieszeniu i prędkości na wzniesieniach. W artykule przeanalizowano alternatywę dla budowy infrastruktury trakcji elektrycznej, która jest postrzegana jako kosztowna i zaburzająca walory krajobrazowe.

  • Amigdalina - lek przeciwnowotworowy czy trucizna?
    • Ewa Jaszczak-Wilke
    • Sylwia Narkowicz
    • Jacek Namieśnik
    • Żaneta Polkowska
    2017 Pełny tekst Analityka: Nauka i Praktyka

    Choroby nowotworowe, w wyniku których umiera rocznie średnio 96 tys. Polaków stanowią drugą najważniejszą przyczynę zgonów w Polsce. W walce z rakiem, oprócz tradycyjnych metod leczenia, równie ważna jest profilaktyka, która polega na upowszechnianiu wiedzy na temat czynników ryzyka nowotworów, wyeliminowania palenia papierosów i przestrzegania właściwej diety. Coraz większe zainteresowanie w walce z chorobami nowotworowymi wzbudza terapia metaboliczna amigdaliną. Naturalnym źródłem tego glikozydu cyjanogennego są pestki owoców. Według dr. Krebsa, pioniera tego typu leczenia niekonwencjonalnego, amigdalina może pacjentowi jedynie pomóc a efekt leczenia zależy od stopnia zaawansowania raka oraz potencjalnych szkód wyrządzonych przez konwencjonalne leczenie. Z drugiej strony istnieje możliwość zatrucia jonami cyjankowymi. Wybór techniki analitycznej służącej do oznaczania amigdaliny, zależy od formy glikozydu, który będzie oznaczany w odpowiednio przygotowanych próbkach.

  • Amplifying the Randomness of Weak Sources Correlated With Devices
    • Paweł Horodecki
    • Hanna Wojewódka
    • Fernando G.s.l. Brandao
    • Andrzej Grudka
    • Karol Horodecki
    • Michał Horodecki
    • Ravishankar Ramanathan
    • Maciej Stankiewicz
    • Marcin Pawłowski
    2017 IEEE TRANSACTIONS ON INFORMATION THEORY

    The problem of device-independent randomness amplification against no-signaling adversaries has so far been studied under the assumption that the weak source of randomness is uncorrelated with the (quantum) devices used in the amplification procedure. In this paper, we relax this assumption, and reconsider the original protocol of Colbeck and Renner using a Santha-Vazirani (SV) source. To do so, we introduce an SV-like condition for devices, namely that any string of SV source bits remains weakly random conditioned upon any other bit string from the same SV source and the outputs obtained when this further string is input into the devices. Assuming this condition, we show that a quantum device using a singlet state to violate the chained Bell inequalities leads to full randomness in the asymptotic scenario of a large number of settings, for a restricted set of SV sources (with 0 ≤ ε <; (2(1/12) - 1)/(2(2(1/12) + 1)) ≈ 0.0144). We also study a device-independent protocol that allows for correlations between the sequence of boxes used in the protocol and the SV source bits used to choose the particular box from whose output the randomness is obtained. Assuming the SV-like condition for devices, we show that the honest parties can achieve amplification of the weak source, for the parameter range 0 ≤ ε <; 0.0132, against a class of attacks given as a mixture of product box sequences, made of extremal no-signaling boxes, with additional symmetry conditions. Composable security proof against this class of attacks is provided.

  • An algorithm for enhancing macromodeling in finite element analysis of waveguide components
    • Grzegorz Fotyga
    • Krzysztof Nyka
    2017 Pełny tekst

    An algorithm for enhancing the finite element method with local model order reduction is presented. The proposed technique can be used in fast frequency domain simulation of waveguide components and resonators. The local reduction process applied to cylindrical subregions is preceded by compression of the number of variables on its boundary. As a result,the finite element large system is converted into a very compact set of linear equations which thus can be solved extremely fast.

  • An analysis of the characteristics of Indonesian industrial sectors: 2005-2010
    • Ubaidillah Zuhdi
    2017

    The purpose of the current study is to analyze the characteristics of Indonesian industrial sectors from 2005 through 2010. The study employs the analysis instruments from the Input-Output (IO) analysis, namely the indices of the power of dispersion, and the sensitivity of dispersion. For 2005 and 2010, the study focuses on nine and seventeen industries, respectively. The results show that industry 3, manufacturing, placed the quadrant I on the analysis period. The fact shows that, from 2005 through 2010, the industry had a strong influence on the Indonesian economic activities, and received high impacts from the external aspects. In other words, the industry has great potency for the Indonesian economy. From the results one can also see that sector 4, electricity and gas, included in the quadrant I in 2010. This fact explains that the sector has also great potency for the economic activities of Indonesia. Thus, the Indonesian government should prioritize the industries development.

  • An analysis of the characteristics of Indonesian industrial sectors: 2005-2010
    • Ubaidillah Zuhdi
    2017 Pełny tekst IOP Conference Series: Earth and Environmental Science

    The purpose of the current study is to analyze the characteristics of Indonesian industrial sectors from 2005 through 2010. The study employs the analysis instruments from the Input-Output (IO) analysis, namely the indices of the power of dispersion, and the sensitivity of dispersion. For 2005 and 2010, the study focuses on nine and seventeen industries, respectively. The results show that industry 3, manufacturing, placed the quadrant I on the analysis period. The fact shows that, from 2005 through 2010, the industry had a strong influence on the Indonesian economic activities, and received high impacts from the external aspects. In other words, the industry has great potency for the Indonesian economy. From the results one can also see that sector 4, electricity and gas, included in the quadrant I in 2010. This fact explains that the sector has also great potency for the economic activities of Indonesia. Thus, the Indonesian government should prioritize the industries development.

  • An analysis of the characteristics of Japanese industrial sectors from 2005 through 2011
    • Ubaidillah Zuhdi
    2017

    The purpose of the current study is to analyze the characteristics of Japanese industrial sectors from 2005 through 2011. The study employs the analysis tools from the Input-Output (IO) analysis, namely the indices of the power of dispersion, and the sensitivity of dispersion. The study focuses on the thirteen industries. The characteristics are described by the quadrants of analyzed charts. The results show that industries 3 and 9, manufacturing, and transport and postal services, respectively, placed the quadrant I on the analysis period. The fact shows that, from 2005 through 2011, these industries had strong influences on the Japanese economic activities, and received high impacts from the external aspects. In other words, the industries have great potency for the Japanese economy. Thus, the Japanese government should prioritize the industries development. From the results one can also view that, from 2005 through 2011, almost all Japanese industries had no the quadrant change. The fact describes that the characteristics of almost all Japanese industrial sectors on the period of analysis did not change.

  • An application for a new type of pneumatic engine concept
    • Karol Tyszkowski
    2017 Pełny tekst

    Heavy trucks are often equipped with loading and unloading systems like dock levellers with swing lip or telescopic lip. Most of these devices require hydro-electrical energy supply systems (eg. the pump that presses the working substance to the actuators must be propelled by electric engine.) The space taken by pump with electric engine can be reduced on condition that a new type of pneumatic drive will be considered. It is possible to supply pneumatic engine from air supply system that is existing on the board of transport vehicle which is a part of brake system. In addition, this solution allows for the use of compressed air energy stored earlier in the accumulation tank. Platform longitudinal movement that is provided by linear hydraulic cylinders also can be achieved with use of rotary pneumatic motor and simple linear gear units. For the other type of platforms engine rotational movement is converted to lip swing movement with usage of ropes or chains. The proposed concept assumes that the drive of the loading and unloading equipment is provided by a high-torque pneumatic engine which works in the reversed cycle of the tooth compressor and is propelled by compressed air directly from the truck's braking system. The reversal of the tooth compressor cycle is possible by attaching the discharge window of the compressor to the pressured tank with air. Such modification causes that suction window of the compressor becomes the outlet of the air and then tooth compressor is operated as a pneumatic engine.

  • An Approach to Mean Path Loss Model Estimation for Off-Body Channels
    • Sławomir Ambroziak
    • Kenan Turbić
    • Luis M. Correia
    2017

    This paper presents an approach to estimation of the mean path loss model parameters in off-body Body Area Networks channels. In this approach, the path loss exponent is constrained to a value obtained for the line-of-sight (LoS) propagation in the co-polarised channel, considering a generalised static scenario. The comparison of the goodness of fit between the proposed approach and other approaches, for a set of measurements obtained in an indoor environment, indicates that a significantly better model is obtained for the LoS case, somewhat improved model for the quasi-LoS, while the goodness of fit is almost unchanged for the non-LoS case.

  • An Archaeological - Architectural Documentation Based on Close Range Photogrammetry
    • Tadeusz Widerski
    • Karol Daliga
    2017

    Wisłoujście Fortress is a historical defensive object located on the southwest coast of the Gulf of Gdańsk. Fort Carre, Eastern Sconce and Ravelin are parts of this postmediaeval fortification. In view of planned regeneration of this fortification complex, at the initiative of the Gdańsk History Museum and Institute of Archaeology and Ethnology of the University of Gdańsk it was decided to perform a documentation of one Fortress object. Authors decided to report the three-dimensional documentation to perform a series of detailed analyzes of this historic building. Photogrammetric methods was selected as the most effective and less time consuming in preparing documentation. In the article, authors present the possibility of using close range photogrammetry to create historic buildings documentation. The study based on one room in Fortress. The limitations of this method were pointed out. The capable accuracy in this type of studies was presented. Fragments of made documentation was also shown.

  • An audio-visual corpus for multimodal automatic speech recognition
    • Andrzej Czyżewski
    • Bożena Kostek
    • Piotr Bratoszewski
    • Józef Kotus
    • Marcin Szykulski
    2017 Pełny tekst JOURNAL OF INTELLIGENT INFORMATION SYSTEMS

    review of available audio-visual speech corpora and a description of a new multimodal corpus of English speech recordings is provided. The new corpus containing 31 hours of recordings was created specifically to assist audio-visual speech recognition systems (AVSR) development. The database related to the corpus includes high-resolution, high-framerate stereoscopic video streams from RGB cameras, depth imaging stream utilizing Time-of-Flight camera accompanied by audio recorded using both: a microphone array and a microphone built in a mobile computer. For the purpose of applications related to AVSR systems training, every utterance was manually labeled, resulting in label files added to the corpus repository. Owing to the inclusion of recordings made in noisy conditions the elaborated corpus can also be used for testing robustness of speech recognition systems in the presence of acoustic background noise. The process of building the corpus, including the recording, labeling and post-processing phases is described in the paper. Results achieved with the developed audio-visual automatic speech recognition (ASR) engine trained and tested with the material contained in the corpus are presented and discussed together with comparative test results employing a state-of-the-art/commercial ASR engine. In order to demonstrate the practical use of the corpus it is made available for the public use.

  • An electronic nose based on the semiconducting and electrochemical gas sensors
    • Grzegorz Jasiński
    • Paweł Kalinowski
    • Łukasz Woźniak
    • Piotr Adam Kościński
    • Piotr Jasiński
    2017

    The practical application of human nose for fragrance recognition is severely limited by the fact that our sense of smell is subjective and gets tired easily. Consequently, there is a significant need for an instrument that can be a substitution of the human sense of smell. Development of an electronic nose devices is an active area of research starting from pioneering research of Dodd and Persuad in the mid-1980s. Such systems are used in growing number of applications. They comprise an array of several electrochemical gas sensors with partial specificity and a pattern recognition algorithms. Since most of the existing types of sensors are characterized by low selectivity, they can all be used in the construction of electronic noses. Most electronic nose systems are based only on one type of gas sensors. However, different types of sensors have different advantages and disadvantages. In this article, an electronic nose system for the purpose of incorporating different types of sensors has been proposed developed. Such approach allows to benefit from advantages of different type of sensors, and thus improve the operation of the entire system.