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Wyszukujesz frazę "Gacek, Z." wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Properties of Acoustic Emission Signals Coming from Partial Discharges Caused by Modeled Sources Immersed in Transformer Oil
    Autorzy:
    Witos, F.
    Gacek, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807759.pdf
    Data publikacji:
    2009-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.40.Le
    52.80.-s
    77.22.Jp
    84.70.+p
    Opis:
    Investigation results concerning acoustic emission signals coming from partial discharges generated by modeled sources are presented in the paper. These sources have been made using different bushing ends (without any extra elements and with a thread or a pike) situated directly in the oil, but without screens typical for partial discharge investigations in a bushing. Measurements have been carried out using own measuring acoustic emission system DEMA-COMP and - in a parallel way - computer-aided partial discharges measuring system TE 571 (produced by the firm Haefely Trench). Fundamental and advanced analysis of acoustic emission signals has been made. These signals were recorded in 20 measuring situations which need to multiple installation of acoustic emission sensors. Conclusions resultant from own originate advanced analysis of signals content description of properties revealed by defined acoustic emission descriptors.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 3; 422-427
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Testing of Partial Discharges in Generator Coil Bars with the Help of Calibrated Acoustic Emission Method
    Autorzy:
    Witos, F.
    Gacek, Z.
    Opilski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1811569.pdf
    Data publikacji:
    2008-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.40.Le
    43.60.Lg
    52.80.s
    77.22.Jp
    84.70.+p
    Opis:
    Investigation results of acoustic emission signals coming from partial discharges within chosen generator coil bar, in relation to measurement results of apparent charge introduced by partial discharges sources, are presented in the article. Analysis is based on amplitude distributions calculated for acoustic emission signals, ordered at different measuring points for different values of the supply voltage. In order to assign acoustic emission signal to its advance degree a descriptor named by an acronym ADP (defined by authors) is calculated for each amplitude distribution. Descriptor families describing acoustic emission signals measured at particular measuring points (for different supply voltages) are presented in relation to apparent charge introduced by acoustic emission sources. These families concerning acoustic emission signals, measured at different measuring points for identical supply voltage, enable us to locate acoustic emission sources with maximum activity.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 6A; A-249-A-258
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anusual Application of Partial Discharges to Diagnose of High Voltage Power Transformers
    Autorzy:
    Gacek, Z.
    Szadkowski, M.
    Malitowski, G.
    Witos, F.
    Olszewska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1493101.pdf
    Data publikacji:
    2011-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.40.Le
    52.80.s
    07.50.Hp
    Opis:
    The article contains information on research carried out in Electric Faculty of Silesian University of Technology, made at test stations and aimed at diagnosis how is actual technical state of high voltage power oil transformers. Opinion on a state of transformers is based on analysis results of partial discharge measurements. Authors use simultaneously: electric, acoustic and dissolved gas analysis method. Applied acoustic method is the original own one. Non-conventional application of electric method is proposed, too. In the frame of chosen methodology the partial discharges are measured and next calculations of quantities describing partial discharges within particular methods are carried out in order to describe phenomena commonly for electric and acoustic method. Information sources about level and kind of partial discharges are measurement results obtained from electric method whereas information on places where partial discharges appear is contained in measurement results coming from acoustic method. Authors present selected application results of such a combined measuring method.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 4; 609-615
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Results of Experiments with Fiber Pressure Sensor Applied in the Polish Artificial Heart Prosthesis
    Autorzy:
    Konieczny, G.
    Opilski, Z.
    Pustelny, T.
    Gacek, A.
    Gibinski, P.
    Kustosz, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506799.pdf
    Data publikacji:
    2010-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.79.-e
    42.81.-i
    07.07.Df
    47.63.Cb
    Opis:
    The following paper introduces the problem of noninvasive pressure measurements in Polish artificial heart prosthesis. The pressure sensor is proposed and introduced, and preliminary tests are shown. The paper deals with the proposed sensing elements, requirement noninvasive solution and preliminary tests of polyurethane membrane transmission. The paper includes also experimental results of a fiber pressure sensor introducing noninvasive pressure measurements with pressure transmission through a polyurethane tube wall.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 6; 1183-1185
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Noninvasive acoustic blood volume measurement system for the POLVAD prosthesis
    Autorzy:
    Opilski, Z.
    Konieczny, G.
    Pustelny, T.
    Gacek, A.
    Kustosz, R.
    Gawlikowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/200093.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    heart prosthesis
    medical acoustics
    blood volume measurement system
    Opis:
    The following paper presents researches concerning a noninvasive real-time blood volume measurement system applied in POLVAD prosthesis. The system is based on the acoustic Helmholtz resonator principle. The basis of the measurement method, followed by the preliminary tests of the possibility of incorporating the Helmholtz resonance idea into the POLVAD prosthesis is shown. The paper includes the actual measurement system construction and test results, both static and dynamic obtained at the Foundation for Cardiac Surgery Development in Zabrze, Poland. Conclusions and future plans are presented too.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 4; 429-433
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Examples of the use of wireless transmission systems in the monitoring of patients during cardiac rehabilitation at home
    Autorzy:
    Szczurek, Z.
    Gacek, A.
    Brandt, J.
    Curyło, A.
    Kowalski, P.
    Świda, K.
    Geodecki, M.
    Michnik, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/333367.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
    Tematy:
    bezprzewodowa transmisja
    system monitorowania
    rehabilitacja kardiologiczna
    wireless transmition
    monitoring system
    Revitus
    cardiac rehabilitation
    Opis:
    ITAM completed work on developing a prototype of the system designed to monitor and conduct cardiac rehabilitation at home. In the course of project execution, a number of devices have been made or adapted to work within the system. The primary problem to be solved was to develop a way of communication for these devices, which would allow the transmission of necessary data in a way that would be convenient for the patient and provide the staff supervising the patient with easy access to this data. Ensuring correct operation the system required a variety of cooperating transmission systems to be used. Communication within the apartment utilizes a wireless network based on a Bluetooth link. The parent node of this network is the Base Station, which is also an intermediary for communication between devices within the apartment and the Centre for Monitoring and Communications. The main module carried by the patient is the ECG module that, in addition to its measurement function, serves as a personal area network node based on elements of the ANT standard supporting the Messenger carried by the patient. This module is also tasked with supervising the patient outside the apartment, making communication with the Centre possible via a GSM/GPRS network. The Base Station exchanges information with the Monitoring and Communication Centre located on a server via the Internet. Access for the patient's doctor or support worker to the Monitoring Centre is possible from any computer with access to the Internet by logging onto the Centre's server.
    Źródło:
    Journal of Medical Informatics & Technologies; 2011, 17; 159-166
    1642-6037
    Pojawia się w:
    Journal of Medical Informatics & Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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