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    Wyświetlanie 1-14 z 14
    Tytuł:
    Glony środowisk zanieczyszczonych metalami ciężkimi
    Algae in heavy metal - polluted environments
    Autorzy:
    Skowroński, Tadeusz
    Kalinowska, Renata
    Pawlik-Skowrońska, Barbara
    Powiązania:
    https://bibliotekanauki.pl/articles/1201887.pdf
    Data publikacji:
    2002
    Wydawca:
    Polskie Towarzystwo Przyrodników im. Kopernika
    Opis:
    Algae are very diverse photosynthetic plants that have neither roots nor leafy shoots and which also lack vascular tissues (VAN DEN HOEK et al., 1995). Most of them are aquatic organisms and occur both in fresh and saline waters, but they also inhabit terrestrial environments. As pioneers, algae take part in primary production and in colonization of poor and degraded habitats. The primary impact of heavy metals on algae is at the biochemical and physiological levels. These biochemical and physiological effects may cause ecological effects. Usually, in heavy metal-polluted environments algal biomass as well as algal species diversity decrease. In such places the sensitive organisms and species in algal communities may be replaced by tolerant ones as a consequence of chemical stress. The observed shift in species composition in a community affected by heavy metals is not a random process; chronic exposure to low concentrations of heavy metals may act as a selection factor. Preliminary studies on algal species diversity and heavy metal resistance of species inhabiting Zn, Pb or Cu polluted sites (near metallurgical and mining plants in Silesia) are described.
    Źródło:
    Kosmos; 2002, 51, 2; 165-173
    0023-4249
    Pojawia się w:
    Kosmos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wybrane uwagi na temat roli zadań matematycznych w procesie nauczania-uczenia się matematyki
    Autorzy:
    Major, Joanna
    Olik-Pawlik, Bożena
    Ratusiński, Tadeusz
    Zaręba, Lidia
    Powiązania:
    https://bibliotekanauki.pl/articles/1789277.pdf
    Data publikacji:
    2017-07-05
    Wydawca:
    Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
    Tematy:
    teachers education
    teaching-learning process
    problem solving
    mathematical
    tasks
    Opis:
    The paper presents the comments relating to the role of tasks in theprocess of teaching and learning of mathematics in the context of educationof students studying to become teachers. In the considerations part, referencewas made to the fragments of undergraduate and postgraduate works, madeat seminars of didactics of mathematics.
    Źródło:
    Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Mathematicae Pertinentia; 2016, 8; 101-118
    2080-9751
    2450-341X
    Pojawia się w:
    Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Mathematicae Pertinentia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    O roli prac dyplomowych z dydaktyki matematyki w kształceniu przyszłych nauczycieli matematyki
    On the role of dissertations in didactics of mathematics in the training process of future teachers of mathematics
    Autorzy:
    Major, Joanna
    Olik-Pawlik, Bożena
    Ratusiński, Tadeusz
    Zaręba, Lidia
    Powiązania:
    https://bibliotekanauki.pl/articles/1791033.pdf
    Data publikacji:
    2018-06-01
    Wydawca:
    Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
    Tematy:
    educating students – future teachers
    the teaching-learning process of
    mathematics
    thesis
    mathematical activities
    generalization
    Opis:
    In the training process of students – future teachers of mathematics, an important role is played by, among others, participation in the diploma seminar, during which the student (being at the final stage of studies)is tasked with preparing a bachelor’s or master’s thesis. This dissertation may be purely mathematical in nature or refer to problems in didactics of mathematics. The article aims to develop and illustrate some thoughts from previous works of the authors (Zaręba, 2009; Major, Olik-Pawlik, Ratusiński, Zaręba, 2016), pointing to the legitimacy of the preparation of teacher diploma theses in the field of didactics of mathematics by students.
    Źródło:
    Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Mathematicae Pertinentia; 2017, 9; 111-138
    2080-9751
    2450-341X
    Pojawia się w:
    Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Mathematicae Pertinentia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental verification of the usefulness of selected infrasound and low-frequency noise (ILFN) indicators in assessing the noise annoyance of wind turbines
    Autorzy:
    Wszołek, Tadeusz
    Mleczko, Dominik
    Pawlik, Paweł
    Kłaczyński, Maciej
    Małecki, Paweł
    Stępień, Bartłomiej
    Powiązania:
    https://bibliotekanauki.pl/articles/24201946.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Poznańska. Instytut Mechaniki Stosowanej
    Tematy:
    wind turbine noise
    infrasound
    low-frequency noise indicators
    hearing threshold levels
    hałas turbin wiatrowych
    infradźwięki
    wskaźniki hałasu niskoczęstotliwościowego
    próg słyszalności
    Opis:
    This paper presents an overview of the indices used in evaluating ILFN noise, based on C and G weighting curves and LC-LA difference parameter, as well as curves compared to the loudness threshold curve. The research section includes measurement results of wind turbine (WT) noise along with proposed indicators for evaluating this noise in the infrasound and low-frequency bands at distances of 250 m, 500 m and 1000 m from the turbine. The results obtained indicate low noise levels in the infrasound band, lower than the threshold curves from a dozen or so dB in the upper part of this band to nearly 60 dB in the lower part. The LC-LA indicator has been shown to be of poor utility for evaluating low-frequency noise, with the LG indicator reasonably useful for evaluating infrasound noise.
    Źródło:
    Vibrations in Physical Systems; 2022, 33, 3; art. no. 2022315
    0860-6897
    Pojawia się w:
    Vibrations in Physical Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the Usefulness of Measurement on a Board at Ground Level for Assessing the Noise Level from a Wind Turbine
    Autorzy:
    Wszołek, Tadeusz
    Pawlik, Paweł
    Mleczko, Dominik
    Chronowska, Jagna
    Powiązania:
    https://bibliotekanauki.pl/articles/176301.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    wind turbine noise
    amplitude modulation
    acoustical measurements
    environmental acoustics
    Opis:
    The specific working conditions of the wind turbine in strong wind cause a number of problems in the measurement of noise indicators used in its short and long-term assessment. The wind is a natural working environment of the turbine, but it also affects the measurement system, moreover, it can be a secondary source of other sounds that interfere with the measurement. One of the effective methods of eliminating the direct impact of wind on the measurement system is placing the microphone on the measurement board at ground level. However, the obtained result can not be directly compared with the admissible values, as it has to be converted to a result at a height of 4 m. The results of previous studies show that this relation depends, inter alia, on the speed and direction of the wind. The paper contains the results of measurements on the measurement board, according to EN 61400-11:2013, and at a height of 4 m above ground made simultaneously in three points around the 2 MW turbine at various instantaneous speeds and changing wind directions. Analysis of the impact of measuring point location on the measurement result of noise indicators and the occurrence of additional features affecting the relationship between the values measured on the board and at the height of 4 m, and especially the tonality, amplitude modulation and content of low frequency content, was made.
    Źródło:
    Archives of Acoustics; 2020, 45, 1; 165-175
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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