Sökning: "long-term trends"

Visar resultat 16 - 20 av 197 avhandlingar innehållade orden long-term trends.

  1. 16. Long-term observations of polar mesosphere summer echoes using the ESRAD MST radar

    Författare :Maria Smirnova; Patrick Joseph Espy; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rymdteknik; Space Technology;

    Sammanfattning : Polar Mesosphere Summer Echoes (PMSE) are strong radar echoes observed from altitudes of 80-90 km in polar regions, during summer time. PMSE are closely related to the fascinating atmospheric phenomenon known as noctilucent clouds (NLC). LÄS MER

  3. 17. Temporal and spatial trends of organohalogens in guillemot (Uria aalge) from North Western Europe

    Författare :Hrönn Jörundsdóttir; Åke Bergman; Derek Muir; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arctic; environmental; monitoring; pollution; time trends; spatial trends; Environmental chemistry; Miljökemi; Environmental Chemistry; miljökemi;

    Sammanfattning : The Arctic and sub-Arctic region of the North Atlantic is a remote area, also in relations to environmental contaminants, such as POPs, BFRs and last but not least, PFCs. Both the BFRs and PFCs are considered emerging pollutants of significant environmental concern. LÄS MER

  4. 18. Semi-natural meadows in southern Sweden - changes over time and the relationship between nitrogen supply and management

    Författare :Gudrun A I Berlin; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plant community dynamic; Nitrogen; Mowing; Meadows; Management; Long-term study; Landscape changes; Field experiment; Community diversity; Fertilisation; Species changes; Species turnover; Plant ecology; Växtekologi;

    Sammanfattning : In this thesis, I have studied continuously managed semi-natural meadows in south-central Sweden. The purpose was 1) to make a survey of meadow vegetation in the region 2) to compare two investigations of the vegetation, one from 1963-1966 and one from 1990 3) to investigate experimentally in the field how increased nitrogen supply rate as well as changed management intensity effects the nitrogen economy and species richness in two meadow communities. LÄS MER

  5. 19. Stroke epidemiology in Southern Sweden. Trends in incidence and survival across two decades with projections into the future

    Författare :Björn Hallström; Lund Neurologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; neuropsykologi; neurofysiologi; hospitalization; Neurology; neuropsychology; neurophysiology; Neurologi; trends; survival; incidence; stroke; epidemiology;

    Sammanfattning : Background: Stroke is a major cause of death and disability. Investigations of the epidemiological trends for stroke might result in better understanding of stroke pathogenesis and prevention. LÄS MER

  7. 20. Demographics and Future Needs for Public Long Term Care and Services among the Elderly in Sweden : The Need for Planning

    Författare :Ilija Batljan; Mats Thorslund; Joakim Palme; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; ageing; planning; demographic projections; health status; mortality; educational composition; last years of life; Older people and ageing; Äldre och åldrande; socialt arbete; Social Work;

    Sammanfattning : Long term care and social services (LTCaS) for older people are an important part of the Scandinavian welfare state. The fast growing number of elderly people in Sweden has caused many concerns about increases in future needs (and particularly costs) of age-related social programs such as LTCaS. LÄS MER