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Wyszukujesz frazę "Jankowski, G." wg kryterium: Autor

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    Wyświetlanie 1-7 z 7
    Tytuł:
    Adjustable Generator of Edge-Rounded Trapezoidal Waveforms
    Autorzy:
    Jankowski, M.
    Jabłoński, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/227124.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    trapezoidal waveform generation
    edge-rounding
    signal shaping
    harmonics reduction
    Opis:
    An approach to design a trapezoidal waveform generator with edge-rounding functionality is presented. The paper describes circuit able to produce edge-rounded trapezoidal waveform. Adjustment of numerous waveform parameters is possible. The signal path inside the circuit is very short. Most of circuitry required for waveform edge-rounding and adjustment is placed outside the signal path and works in DC mode.
    Źródło:
    International Journal of Electronics and Telecommunications; 2012, 58, 3; 213-218
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impedance measurements problem in antennas for RFID technique
    Autorzy:
    Jankowski-Mihułowicz, P.
    Pitera, G.
    Węglarski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/221609.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    RFID
    antenna
    impedance measurement
    differential probe
    Opis:
    The authors paid particular attention to the problem of antenna impedance measurements in the RFID technique. These measurements have to be realized by using two ports of a vector network analyzer and dedicated passive differential probes. Since the measurement process and estimated parameters depend on the frequency band, operating conditions, type of the system component and antenna designs used, appropriate verification of the impedance parameters on the basis of properly conducted experiments is a crucial stage in the antenna synthesis of transponders and read/write devices. Accordingly, a systematized procedure of impedance measurements is proposed. It can be easily implemented by designers preparing antennas for different kinds of RFID applications. The essence of indirect measurements of the differential impedance parameters is discussed in details. The experimental verification has been made on the basis of a few representative examples.
    Źródło:
    Metrology and Measurement Systems; 2014, 21, 3; 509-520
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Discretization of data using Boolean transformations and information theory based evaluation criteria
    Autorzy:
    Jankowski, C.
    Reda, D.
    Mańkowski, M.
    Borowik, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/200750.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    machine learning
    discretization
    discernibility function
    logic minimization
    information theory
    entropy
    nauczanie maszynowe
    dyskretyzacja
    minimalizacja funkcji logicznych
    teoria informacji
    entropia
    Opis:
    Discretization is one of the most important parts of decision table preprocessing. Transforming continuous values of attributes into discrete intervals influences further analysis using data mining methods. In particular, the accuracy of generated predictions is highly dependent on the quality of discretization. The paper contains a description of three new heuristic algorithms for discretization of numeric data, based on Boolean reasoning. Additionally, an entropy-based evaluation of discretization is introduced to compare the results of the proposed algorithms with the results of leading university software for data analysis. Considering the discretization as a data compression method, the average compression ratio achieved for databases examined in the paper is 8.02 while maintaining the consistency of databases at 100%.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 4; 923-932
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of the Material Relative Permittivity in the UHF Band by Using T and Modified Ring Resonators
    Autorzy:
    Jankowski-Mihułowicz, P.
    Lichoń, W.
    Pitera, G.
    Węglarski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/226863.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    relative permittivity
    UHF band
    ring resonator
    T-resonator
    Opis:
    The complete methodology of designing T- and modified ring resonators in the UHF band are presented in the paper. On the basis of proposed algorithms, the dedicated software tool has been elaborated in order to determine material parameters of contemporary substrates. The program is implemented in the Mathcad environment and it includes the base of information on known materials used in electronic products. Also, test sample series for selected substrate materials (IS680, FR408, I-SPEED PCB ISOLA and A6-S LTCC FERRO) and operating requencies from 1 GHz to 3 GHz are analyzed in details. The special test stand with a vector network analyzer has been applied in experiments. The obtained data of relative permittivity measurements and model calculations are described, discussed and concluded.
    Źródło:
    International Journal of Electronics and Telecommunications; 2016, 62, 2; 129-134
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Passive UHF RFID-enabled sensor system for detection of products exposure to elevated temperature
    Autorzy:
    Janeczek, K.
    Jakubowska, M.
    Kozioł, G.
    Jankowski-Mihułowicz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/220717.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    RFID
    temperature sensor
    printed antenna
    screen printing
    printed electronics
    Opis:
    Temperature change is one of key factors which should be taken into account in logistics during transportation or storage of many types of goods. In this study, a passive UHF RFID-enabled sensor system for elevated temperature (above 58°C) detection has been demonstrated. This system consists of an RFID reader and disposable temperature sensor comprising an UHF antenna, chip and temperature sensitive unit. The UHF antenna was designed and simulated in an IE3D software. The properties of the system were examined depending on the temperature level, type of package which contains the studied objects and the type of antenna substrate.
    Źródło:
    Metrology and Measurement Systems; 2013, 20, 4; 591-600
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The efficacy of lactic acid bacteria Pediococcus acidilactici, lactose and formic acid as dietary supplements for turkeys
    Autorzy:
    Wajda, S
    Smiecinska, K.
    Jankowski, J.
    Matusevicius, P.
    Buteikis, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/31170.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    animal production
    animal feeding
    turkey
    probiotic
    lactose
    lactic acid bacteria
    Pediococcus acidilactici
    formic acid
    dietary supplement
    feed supplementation
    slaughter value
    meat quality
    Opis:
    A feeding trial was performed on 1400 Big-6 turkey toms divided into experimental groups subject to the use of dietary supplements. The ain of this study was to evaluate the efficacy of the probiotic supplement Bactocell, containing lactic acid bacteria Pediococcus acidilactici, and lactose, administered to turkeys separately or in combination, as well as a formic acid supplement. The addition of the probiotic under test (lactic acid bacteria Pediococcus acidilactici) to diets for turkeys contributed to higher daily gains and lower feed consumption per kg weigh gain only during the first 12 weeks of their life. Diet supplementation with lactic acid bacteria and lactose reduced mortality rates. A slaughter value analysis revealed only a slightly (by approximately 1%) higher content of breast muscle and a lower content of thigh muscle in birds fed diets supplemented with lactic acid bacteria. Turkeys receiving lactic acid bacteria or lactose and a combination of both these supplements were characterized by a higher fat content of meat and slightly lower pH values, whereas meat from turkeys fed lactose-supplemented diets was darker in color. The addition of formic acid Acidum formicum to diets for turkeys contributed only to lower mortality rates.
    Źródło:
    Polish Journal of Veterinary Sciences; 2010, 13, 1; 45-51
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development board of the autonomous semi-passive RFID transponder
    Autorzy:
    Jankowski-Mihułowicz, P.
    Węglarski, M.
    Pitera, G.
    Kawalec, D.
    Lichoń, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/201726.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    RFID
    semi-passive transponder
    energy harvesting
    sensors
    development board
    semi-pasywny transponder
    zbieranie energii
    czujniki
    Opis:
    The idea of multiband development board designed to support and advance the technique of battery-less autonomous semi-passive RFID transponders is presented in the paper. The extra function of harvesting energy from the electromagnetic field of different radio communications systems, the ultra efficient power conditioner and the energy storage block are applied in the proposed construction. The facility of utilizing gathered energy is provided to support designers in developing applications of automatic object identification. Since the evaluation board is to work without a galvanic cell, the particular emphasis is put on the mechanisms that improve energy efficient operation of the whole electronic circuit. The construction principles and operation modes (charging, cold start, sleep with charging, sleep, measurement and cut-off) of the storage unit are described in depth in the paper. The preproduction batch of the demonstrators has been manufactured on automated assembly line at ELMAK Ltd. Company, according to the elaborated model. It confirms that the author’s demonstrator of the battery-less autonomous semi-passive transponder can be reproduced on an industrial scale. On the basis of the preproduction series, the performance parameters of the final product have been estimated. The presented study should significantly contribute to the RFID technique therefore the authors set up the evaluation process of marketing research and product commercialization.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 3; 647-654
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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