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    Wyświetlanie 1-3 z 3
    Tytuł:
    Covering spaces revisited
    Autorzy:
    West, R. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/745089.pdf
    Data publikacji:
    1971
    Wydawca:
    Polskie Towarzystwo Matematyczne
    Opis:
    The article contains no abstract
    Źródło:
    Commentationes Mathematicae; 1971, 15, 1
    0373-8299
    Pojawia się w:
    Commentationes Mathematicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tobacco smoking in countries of the European Union
    Autorzy:
    Zatonski, W.
    Przewozniak, K.
    Sulkowska, U.
    West, R.
    Wojtyla, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/49377.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Medycyny Wsi
    Opis:
    Background: Existing smoking prevalence comparisons between the ‘old’ and ‘new’ members of the European Union (EU) give a misleading picture because of differences in methodology. A major EU project designed to find ways of closing the health gap between the member states, included the first ever comparison of smoking prevalence between these countries using a methodology that minimises potential biases. Methods: A detailed analysis of methods and data from the most recent nationwide studies was conducted in the adult population of 27 countries of the European Union and Russia as an external comparator. To maximise comparability, daily smoking in the age range 20-64 was used. Prevalence of current daily smoking, former smoking and never smoking were age-standardised and calculated separately for males and females. Findings: The European map of smoking prevalence shows that male smoking prevalence is much higher in the new than the old members of the EU, whereas in females the reverse is true, but there are also very large differences in smoking rates between particular countries within the same region. Sweden clearly has the lowest prevalence, and the prevalence in the United Kingdom (UK) at the time of the surveys emerges as near the average for old-Europe but higher than, for example, Ireland. Interpretation: Restricting the analysis to daily smokers aged 20-64 produces a map of Europe in which variation in prevalence between individual countries within regions is as important as variation across regions. Survey methods need to be harmonised across countries to enable comparisons involving all ages and non-daily as well as daily smokers.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2012, 19, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cosmic Airburst on Developing Allerød Substrates (Soils) in the Western Alps, Mt. Viso Area
    Autorzy:
    Mahaney, William C.
    West, Allen
    Milan, Alison
    Krinsley, David H.
    Somelar, Peeter
    Schwartz, Stephane
    Milner, Michael W.
    Allen, Christopher C.R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2025231.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Black Mat impact/airburst
    Reconstructed soil at time of YDB
    mid-LG-YD paleosol Sedimentary products of cosmic impact/glacial recession
    Nauki o Ziemi
    Opis:
    Although much has been written about a cosmic impact event in the Western Alps of the Mt. Viso area, the event closely tied with the Younger Dryas Boundary (YDB) of 12.8 ka and onset of the Younger Dryas (YD), the affected land surface is considered to contain a similar black mat suite of sediment found on three continents. While work elsewhere has focused on recovered sediment from lake and ice cores, buried lacustrine/alluvial records, and surface glacial and paraglacial records, no one has traced a mountain morphosequence of deposits with the objective of investigating initial weathering/ soil morphogenesis that occurred in ice recessional deposits up to the YDB when the surface was subjected to intense heat, presumably, as hypothesized by Mahaney et al. (2016a) from a cosmic airburst. With the land surface rapidly free of ice following glacial retreat during the Bølling-Allerød interstadial, weathering processes ~13.5 to 12.8 ka led to weathering and soil morphogenesis in a slow progression as the land surface became free of ice. To determine the exposed land character in the mid- to late-Allerød, it is possible to utilize an inverted stratigraphic soil morphogenesis working backward in time, from known post-Little Ice Age (LIA) (i.e. time-zero) through LIA (~0.45 to ~0.10 ka), to at least the middle Neoglacial (~2 ka), to answer several questions. What were the likely soil profile states in existence at the end of the Allerød just prior to the cosmic impact/airburst (YDB)? Assuming these immature weathered regolith sections of the Late Allerød approximated the <1 ka old profiles seen today, and assuming the land surface was subjected to a hypothesized instant temperature burst from ambient to ~2200oC at ~12.8 ka, what would be the expected effect on the resident sediment? To test the mid-LG (YDB) to YD relationship we analyzed the paleosols in both suites of deposits – mid-LG to YD – to test that the airburst grains are restricted to Late Allerød paleosols and using relative-age-determination criteria, that the overlapping YD to mid-LG moraines are closely related in time. These are some of the questions about the black mat that we seek to answer with reference to sites in the upper Guil and Po rivers of the Mt. Viso area.
    Źródło:
    Studia Quaternaria; 2018, 35; 3-23
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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