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    Wyświetlanie 1-3 z 3
    Tytuł:
    FSO system performance analysis based on novel Gamma–Chi-square irradiance PDF model
    Autorzy:
    Todorović, Jelena
    Spalević, Petar
    Panić, Stefan
    Milosavljević, Bojana
    Gligorijević, Milan
    Powiązania:
    https://bibliotekanauki.pl/articles/2033970.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    free space optics
    FSO
    Gamma-Chi-square distribution
    atmospheric turbulence
    pointing error
    on-off keying
    OOK
    Opis:
    In order to provide a novel analytically traceable free space optics (FSO) channel model for describing turbulence based irradiance fluctuations, following basic scintillation theory principles, we have derived closed-form expression for probability density function (PDF) of a new statistical Gamma–Chi-square model. Further, capitalizing on provided model, error performances of FSO system over on-off keying (OOK) transmission scheme both in the presence of atmospheric turbulence and misalignment fading (pointing error) is investigated. For both cases, the average bit error rate (ABER) at the receiving side of the system is determined in an analytically closed form. The results are graphically presented in order to analyze the impact of different levels of turbulence, as well as other relevant parameters, on the quality of the received signal in the OOK modulated FSO system.
    Źródło:
    Optica Applicata; 2021, 51, 3; 335-348
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of low power analog front-end for 13.56MHz RFID transponder
    Autorzy:
    Saleh, S.
    Osman, M.
    Hamdy, G.
    Zaki, A.
    Elsemary, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/397985.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    analog front frond
    RFID
    charge pump
    OOK
    pompa zasilająca
    Opis:
    This paper presents the design of 13.56MHz RF Front-end circuit for low-power medical applications. It converts RF power into DC and then extracts the clock and the data. The design includes rectifier, voltage multiplier, voltage regulator, data demodulator, ring oscillator, RF voltage limiter and LC matching network. It provides an excellent trade-off between high performance, simplicity of architecture, and low power consumption. It is designed to be fully integrated on chip. Simulation is done using 0.35-μm CMOS technology and the results are compared with other reported RFID systems. The total power consumption is adjusted to be around 4 μW at the minimum input power.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2017, 8, 4; 146-149
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Educational potential of the artistic expression of visual impairment in the books for children and youth
    Autorzy:
    Gal-Drzewiecka, Iveta
    Powiązania:
    https://bibliotekanauki.pl/articles/454282.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Ignatianum w Krakowie
    Tematy:
    ook illustration
    visual handicap
    aesthetics, reception
    preschool and elementary education.
    Opis:
    Current need of the social integration of people with a handicap, either physical, social, or other, finds significant professional response in a field of pre-school and elementary education. In the accordance with the request of holistic child's personality development (harmonious integration of its cognitive, social-emotional, and perceptual-motoric areas) the education by art seems to be helpful and effective in removing barriers and deepening child's skills to understand and respect the otherness and also as one of the effective ways leading to the social acceptation and inclusion of people with some kind of a handicap. Paper deals with the possibilities of educational use of illustrated books for children and youth, which thematize one of the handicap types – visual impairment. It roots from the assumption of high effectivity of the experiential methods (“through personal experience to understanding”) and examines inclusive thinking formation options and attitudes of intact pupils through experiential activities, which use illustrated books thematizing blindness. Solution of the issue comes from the analysis and comparison of the poethological aspects of artistic expression of such handicap in concrete book titles. There are compared artistic-expressive and receptive specifics of various illustrative approaches, particularly their aesthetic-experiential potential – extent of possible sensor, emotional, and cognitive experiences, which offer various modalities of the illustrative rendering of visual impairment to the child's recipient. The same attention is given to their ethical and axiological reflection. In the context of these findings, there are defined paradigmatic differences between the books illustrated in traditional ways and artistically experimental books. Following this, there are outlined alternative models of the didactical application of the issue.
    Źródło:
    Multidisciplinary Journal of School Education; 2017, 11; 73-88
    2543-7585
    Pojawia się w:
    Multidisciplinary Journal of School Education
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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