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    Wyświetlanie 1-3 z 3
    Tytuł:
    Anomalous flashovers of silicone rubber insulators under the artificial rain test
    Autorzy:
    Chrzan, Krystian Leonard
    Brzeziński, Henryk Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/1955185.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    flashover
    leakage distance
    porcelain insulator
    silicone rubber insulator
    odległość przecieku
    izolator porcelanowy
    izolator z kauczuku silikonowego
    Opis:
    The wet flashover voltage of medium voltage insulators made of a silicone rubber is 8% lower than the wet flashover voltage of a porcelain insulator with an identical profile. These surprising results, obtained in 2012, were confirmed again in 2019. The flashover development on the composite insulator is very short (less than 30 ms). On the other hand, on the porcelain insulator, the flashover develops longer (1–3 seconds). The Koppelmann equation was modified, and the Obenaus model to calculate the flashover voltage of insulators under the artificial rain was presented. Attention was paid to the importance of insulator diameters and the phenomenon of water cascades.
    Źródło:
    Archives of Electrical Engineering; 2021, 70, 4; 835-844
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Rare Case of Hodkins Lymphoma of the Mediastinum Imitating Retrosternal Goiter - Retrospective Analysis of the Diagnostic Process
    Autorzy:
    Dedecjus, Marek
    Kędzierska, Anna
    Kozak, Józef
    Kordek, Radzisław
    Brzeziński, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/1396684.pdf
    Data publikacji:
    2012-07-01
    Wydawca:
    Index Copernicus International
    Tematy:
    thyroid lymphoma
    Hodgkin's lymphoma
    retrosternal goitre
    Opis:
    Primary extranodal sites of development of lymphoid neoplasms are rare and concern about 5% of patients with Hodgkin's lymphoma. Extranodal development is more common in non Hodgkin's lymphoma and may reach 33%.A 27-year-old woman was diagnosed by a cardiologist for a short breath. On the physical examination no other abnormalities were observed. Echocardiography, performed by cardiologist, revealed a large tumor, overlaying the right ventricle and compressing the pulmonary trunk. Chest X-ray, ultrasound and CT-scan confirmed diagnosis. In fine needle aspiration clear, lucid fluid was obtained. Scintygraphy of the neck and thorax showed accumulation of the marker in the properly placed but enlarged thyroid gland. Patient was qualified for surgical treatment - cervicotomy and sternothomy were performed. The histopatological exam of the tumor revealed Hodgkin's lymphoma of the mediastinum (classical subtype NS-1). Following the surgery, adjuvant therapy was instituted. After the treatment PET-CT-scan did not show any kind of non-physiological radiomarker's accumulation in the monitored regions of the body and in in three-years follow-up the patient shows no signs of recurrence.
    Źródło:
    Polish Journal of Surgery; 2012, 84, 7; 363-366
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Do parents properly assess children’s physical activity level? Study of over 20 thousand children and parents dyads
    Autorzy:
    Metelska, Paulina
    Brzeziński, Michał
    Jankowski, Marek
    Niedzielska, Aleksandra
    Szarszewski, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/1890923.pdf
    Data publikacji:
    2021-12-02
    Wydawca:
    Gdański Uniwersytet Medyczny
    Tematy:
    assessment
    physical activity
    parent view
    children physical activity
    Opis:
    Background: From the public health perspective, it is particularly important to establish links between a persons' perception of their own health and their predispositions to undertake pro-health behaviours that enable them to maintain proper functioning of their body. In the case of the paediatric population, it is crucial to emphasise that adults are responsible for the adoption and development of appropriate health-enhancing behaviours by children. The aim of this study is to verify parents' perception of the level of children’s physical activity (PA) in comparison with objective measures describing children's physical fitness. Material and methods: Material for analysis consists of the results of anthropometric tests and cardiopulmonary exercise capacity of children as well as questionnaires concerning 28,891 children completed by parents. Results: In more than 40% of the sample, the subjectively assessed level of PA was not consistent with the cardiorespiratory fitness level. It was observed that the correct assessment of the level of PA of children is more common for girls, increases with the age of the child and with the level of parental education.
    Źródło:
    European Journal of Translational and Clinical Medicine; 2021, 4, 2; 52-59
    2657-3148
    2657-3156
    Pojawia się w:
    European Journal of Translational and Clinical Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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