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    Wyświetlanie 1-6 z 6
    Tytuł:
    Occupational Exposure Assessment on an FM Mast: Electric Field and SAR Values
    Autorzy:
    Valic, B.
    Kos, B.
    Gajsek, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/89858.pdf
    Data publikacji:
    2012
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    occupational exposure
    exposure assessment
    measurements
    numerical calculation
    SAR
    FM
    radio tower
    FDTD
    Opis:
    Electric field strengths normally exceed the reference levels for occupational exposure in close vicinity to large frequency modulation (FM) transmitters. Thus, a detailed investigation on compliance with basic restrictions is needed before any administrative protection measures are applied. We prepared a detailed numerical model of a 20-kW FM transmitter on a 32-m mast. An electrically isolated anatomical human model was placed in 3 different positions inside the mast in the region where the values of the electric field were highest. The electric field strengths in this region were up to 700 V/m. The highest calculated whole-body specific absorption rate (SAR) was 0.48 W/kg, whereas the maximum 10-g average SAR in the head and trunk was 1.66 W/kg. The results show that the reference levels in the FM frequency range are very conservative for near field exposure. SAR values are not exceeded even for fields 10 times stronger than the reference levels.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2012, 18, 2; 149-159
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simultaneous Occupational Exposure to FM and UHF Transmitters
    Autorzy:
    Valic, B.
    Kos, B.
    Gajsek, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/90025.pdf
    Data publikacji:
    2012
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    occupational exposure
    simultaneous exposure
    measurements
    numerical calculation
    SAR
    FM
    UHF
    FDTD
    Opis:
    Occupational exposure caused by large broadcasting transmitters exceeds current reference levels. As it is common for different radio and TV transmitters to share the location, we analysed combined exposure on a 40-m high mast. The frequency modulation (FM) transmitter, located between the 10th and 30th metre, had the power of 25 kW, whereas an ultra-high frequency (UHF) transmitter of 5 kW occupied the top 8 m of the mast. Measured and calculated values of the electric field strength exceeded the reference levels up to 10 times; however, the results for the specific absorption rate (SAR) values show that the reference levels are very conservative for FM exposure, i.e., basic restrictions are not exceeded even when the reference levels are exceeded 10 times. However, for UHF exposure the reference levels are not conservative; they give a good prediction of real exposure.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2012, 18, 2; 161-170
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ etanolu i fenobarbitalu na właściwości mutagenne zieleni kwasowej czystej V
    Effects of ethanol and phenobarbital on the mutagenic action of acid green pure V
    Autorzy:
    Zawadzka-Kos, M.
    Baranski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/872103.pdf
    Data publikacji:
    1993
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 1993, 44, 2-3
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unstable Inverse Heat Transfer Problems in Microelectronics
    Autorzy:
    De Mey, G.
    Bogusławski, B.
    Kos, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400120.pdf
    Data publikacji:
    2013-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    02.30.Zz
    44.05.+e
    85.40.Qx
    Opis:
    Inverse heat transfer problems are very important for the thermal testability of integrated circuits. Temperature sensors integrated on the same chip measure in real time the power dissipation in one or more critical heat sources of the circuit in order to prevent overheating. It will be demonstrated that these kinds of problems can give rise to mathematical unstabilities or the ill conditioning of the inverse problem. This statement will be proved with the help of several particular cases.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 4; 637-641
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stroke epidemiology based on experience from Krasnik county in eastern Poland
    Autorzy:
    Drop, B.
    Kos, M.
    Furtak-Niczyporuk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086047.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    stroke
    hospitalisation
    district hospital
    urban commune
    rural commune
    Opis:
    Introduction. Cerebrovascular diseases in Poland constitute a bigger threat to life in men than in women, especially after the age of 60. Death rates indicate higher stroke over-mortality in the rural population rather than the urban. At the same time, stroke is the main cause of long-term disability, since half of the patients are unable to independently perform daily activities, which makes them dependent on other people. Materials and method. The study was conducted in the Independent Public Healthcare Institution in Kraśnik, eastern Poland. It covered the medical records of 1,500 patients, 780 women (52%) and 720 men (48%), aged 20–100, diagnosed with cerebral infarction. The patients were hospitalised between 2011–2016 in the Neurology Ward with a Stroke Unit, the Internal Medicine Ward, and the Anaesthetics and Intensive Care Ward. Results. The stroke patients hospitalised in the Independent Public Healthcare Institution in Kraśnik were residents of urban communes (59.1% of subjects) and rural communes (40.9%). The most often diagnosed type of stroke was due to embolism of the cerebral arteries (I63.4) in women (63.48%). In men, the most most often diagnosed type was cerebral infarction due to thrombosis of the cerebral arteries (I63.3; 51.33%). Stroke in 36.15% of the female subjects resulted in death. In male subjects, death occurred in 26.11% of the cases. Conclusions. Women aged around 78-years-old were the most likely to suffer a stroke. In men, it occurred eight years earlier. Despite residents of urban areas being hospitalised due to stroke more often, deaths caused by this disease were recorded the most frequently among rural residents. It can be concluded that primary stroke prevention is the only effective measure for reducing morbidity and premature mortality in the population.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2020, 27, 3; 448-455
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Perspektywy i możliwości wykorzystania siarczkowych wód termalnych w rejonie Kazimierzy Wielkiej
    The possibilities and prospects for the use of thermal waters in the Kazimierza Wielka region
    Autorzy:
    Wiktorowicz, B.
    Lipiec, I.
    Kos, M.
    Młyńczak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075262.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    wody termalne
    geotermalna energia
    Kazimierza Wielka
    thermal waters
    geothermal energy
    Opis:
    The paper presents the possibilities and prospects for the use of thermal waters in the Kazimierza Wielka region. This region, is one of the most prospective areas of thermal waters in central part of Poland. The structure has an asymmetric structure, which comprises mesosoic sediments placed on the older rocks. The principal resources of the thermal waters are accumulated first of the all in the Cenomanian, where the temperature is from 21 to 35°C. All the waters studied have total dissolved solids TDS from 0.6 to 14 g/dm3 and belong to hydrogeochemical classes HCO3–Na, Na–Cl. Thermal waters in may be used for the purpose of balneology, recreaction and heating.
    Źródło:
    Przegląd Geologiczny; 2015, 63, 10/2; 1131-1134
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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