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Wyszukujesz frazę "Kacperski, K." wg kryterium: Autor

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    Wyświetlanie 1-7 z 7
    Tytuł:
    Persistent colonization of 2 hospital water supplies by L. pneumophila strains through 7 years – Sequence-based typing and serotyping as useful tools for complex risk analysis
    Autorzy:
    Pancer, K.
    Matuszewska, R.
    Bartosik, M.
    Kacperski, K.
    Krogulska, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/49447.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2013, 20, 4
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Scanner for 3D Radiotherapy Polymer Gel Dosimetry
    Autorzy:
    Sobotka, P.
    Kozicki, M.
    Maras, P.
    Boniecki, Ł.
    Kacperski, K.
    Domański, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1418096.pdf
    Data publikacji:
    2012-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.50.Gi
    42.66.Si
    87.53.Bn
    Opis:
    Sophisticated techniques employed in radiotherapy for irradiation of tumours require comprehensive dosimetry allowing for precise, high resolution measurements of radiation dose distribution in three dimensions and verification of treatment planning systems. Polymer gel dosimetry has been shown to be a unique technique for such the purpose. If exposed to ionizing radiation, radical polymerisation and crosslinking of monomeric components take place in a 3D polymer gel dosimeter, leading to the formation of large polymeric structures that scatter visible light. This feature allows for optical observation of the effects of the absorbed dose and its distribution. Presently, magnetic resonance imaging is employed most often for the analysis of the 3D polymer gel dosimeters. However, much attention is also being given to the development of optical computed tomography since this technique is hoped to serve as a substitute for expensive and not easily available magnetic resonance imaging. The optical scanner presented in this work consists of a laser diode, a scanning system and a signal detector. A 3D polymer gel dosimeter is measured in an immersion liquid in order to reduce deflection of the light from the dosimeter phantom. The very first results were obtained with the newly constructed scanner and $\text{PABIG}^{nx}$ 3D polymer gel dosimeter, which was inhomogeneously irradiated with $\text{}^{192} Ir$ brachytherapy source. The results have been contrasted with those for the magnetic resonance imaging and are presented in this work together with the description of the developed instrument. Currently, the optimization of the optical scanner is performed.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 5; 969-974
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on human silhouette detection methods for a non-cooperative biometric system
    Autorzy:
    Kacperski, D.
    Włodarczyk, M.
    Grabowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/397871.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    biometrics
    human silhouette detection
    noncooperative detection
    Viola-Jones
    histogram of gradients
    background subtraction
    biometria
    detekcja sylwetki człowieka
    histogram gradientów
    odejmowanie tła
    Opis:
    Together with the development of effective and efficient people identification algorithms, biometric authentication systems become increasingly popular and widespread, leading to a significant growth in the number of institutions interested in implementing and using such systems. Although, several research works focused their efforts on these type of solutions, none of the commonly available systems provide a non-cooperative approach to object identification. For this reason, they are not suitable for use in some specific situations, such as people entering the stadium. Therefore, we decided to go up against these limitations and develop biometric identification system for less constrained scenarios. In this paper, we present an evaluation of different algorithms suitable for human silhouette detection in such environment. We focus on investigating their effectiveness and performance under unconstrained conditions, such as different lighting.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2015, 6, 1; 10-13
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oparta o układy Spartan 6 wielokanałowa karta pomiarowo-sterująca w systemach sterowania piezoelektrycznych elementów wykonawczych
    Spartan 6 based multichannel measurement-control board for piezoelectric actuator control systems
    Autorzy:
    Przygoda, K.
    Poźniak, T.
    Kacperski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/156565.pdf
    Data publikacji:
    2012
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    piezoelektryczne elementy wykonawcze
    system sterowania
    wnęka rezonansowa
    piezoelectric actuators
    control system
    resonant cavity
    Opis:
    Prezentowany system umożliwia jednoczesną kompensację 16 wnęk rezonansowych zaopatrzonych w podwójne piezoelektryczne elementy wykonawcze. Pracę urządzenia nadzoruje nowoczesny układ reprogramowalny rodziny Spartan 6, umożliwiający nie tylko równoległe przetwarzanie sygnałów cyfrowych, ale także wymianę informacji cyfrowych z wykorzystaniem szybkich interfejsów szeregowych. Artykuł przedstawia pierwsze wyniki testów działania systemu po zainstalowaniu go w hali eksperymentalnej.
    The system presented in the paper allows simultaneous compensation of 16 resonant cavities equipped with double piezoelectric actuators, as depicted in Fig. 1. The device operation is assured by Spartan 6 FPGA equipped with digital signal processing units and fast serial links. The analog part of the system is based on a matrix of power amplifiers that allows driving the piezo elements with voltages up to š70 V. Since the piezo elements can be also used as mechanical vibration sensors, multichannel ADCs have been applied to provide fast data acquisition. The piezo actuator and sensor functionality can be exchanged remotely using switching relays. The input and output voltage as well as output current of the power amplifiers have been used for monitoring purpose. The piezo control system sends and receives data from the main signal processing unit (?TCA). The usage of fast serial links enables data throughput up to 125 Mb/s. The paper presents the results of the system performance measurements after its installation in a cryomodule test bench (CMTB). During the tests the main functionality of the module has been checked, as shown in Tab. 1. The system has been also used for adaptive compensation of cavity detuning during RF pulse operation with accelerating field gradients up to 18 MV/m (see Fig. 7). The presented solution will be applied in the incoming X-Ray Free Electron Laser
    Źródło:
    Pomiary Automatyka Kontrola; 2012, R. 58, nr 7, 7; 668-670
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Image acquisition system based on synchronized high-resolution gigabit ethernet cameras
    Autorzy:
    Włodarczyk, M.
    Kacperski, D.
    Płuciennik, T.
    Grabowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/305720.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    image acquisition
    cameras synchronized with illumination
    biometrics
    face recognition
    Opis:
    Over the past few years, a huge increase in the number of various computer vision applications can be observed. These are widely used in such areas as video surveillance, medical diagnostics, biometrics recognition, and the automotive and military industries. Most of these solutions take advantage of high-resolution cameras in order to obtain high-quality images. Surprisingly, little attention is paid in the literature to the practical implementation of off- the-shelf image acquisition systems. Most of the available solutions are composed of custom-developed electronic devices that use specialized multi-core DSPs and/or FPGA technology. Therefore, a novel realization of a scalable and comprehensive image acquisition system based on synchronized high-resolution Gigabit Ethernet cameras is presented in this paper. The proposed solution allows for the connection of multiple cameras along with any number of external illumination modules. The selected devices can be synchronized with each other in user-defined configurations; hence, a designed solution can be easily integrated in both simple and complex applications. The authors describe the design and implementation processes of the proposed platform in detail. The performance issues that can occur in such systems are presented and discussed. The obtained results are encouraging and useful for the development of similar solutions.
    Źródło:
    Computer Science; 2017, 18 (2); 179-194
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calibration of vision systems operating in separate coordinate systems
    Autorzy:
    Kacperski, D.
    Sankowski, W.
    Włodarczyk, M.
    Grabowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/397928.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    camera space mapping
    coordinate system transformation
    stereo vision
    mapowanie przestrzeni kamery
    transformacja układu współrzędnych
    stereowizja
    Opis:
    Over the last years, the use of multiple cameras is becoming more and more popular in today’s computer vision systems. Such approach is widely used in many applications, such as navigation of autonomous mobile robots, video surveillance, the movie industry, augmented reality or people tracking and identification systems. Surprisingly, little attention is paid in the literature to the practical calibration procedures that can be employed to map space between various vision systems. Therefore, in this paper a novel approach that allows to map space between cameras with different coordinate systems: Cartesian and polar is presented. The practical problems that occurs in such scenarios are analysed and thoroughly discussed. The authors present stepby-step description of the proposed calibration procedure. A series of experiments were conducted to confirm the correctness of the presented approach and to demonstrate how to apply the developed solution in practical applications. The proposed method does not require any additional equipment beyond the standard calibration chessboard. The achieved results indicate, that for evaluated cameras configuration, the maximum mapping error for the horizontal and vertical axes does not exceed 0.6°. Obtained results are encouraging and useful for development of similar solutions.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2016, 7, 1; 10-15
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wind rose and modelling of the fate of polynuclear aromatic hydrocarbons in the Central Poland
    Autorzy:
    Gierycz, P.
    Malanowski, S. K.
    Wszelaka-Rylik, M.
    Kacperski, W. T.
    Kowalczyk, D.
    Świetlik, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/207407.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    wind rose
    PAHs
    polycyclic aromatic hydrocarbon
    pollutants
    WWA
    wielopierścieniowe węglowodory aromatyczne
    związki rakotwórcze
    róża wiatrów
    zanieczyszczenia
    Opis:
    The wind rose analysis has been performed for the town of Radom in Central Poland. It was found that West and South-West wind directions significantly dominate in the wind rose, causing PAHs influx from coal power stations. The analysis of the PAHs accumulation in water, soil and bottom sediments based on the fugacity and partition coefficients model has been performed for Domaniów Lake. The results have been compared with the experimental PAHs concentrations in the lake, in- and out-flowing waters as well as in the dust over the lake.
    Źródło:
    Environment Protection Engineering; 2016, 42, 4; 17-35
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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