Sökning: "bälte"

Hittade 5 avhandlingar innehållade ordet bälte.

  1. 1. Goulds bälte : en undersökning av dess utsträckning och rörelseförhållanden

    Författare :Tor N. G. Westin; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : To investigate the kinematics of the local system of stars and to determine the extent of the Gould belt system, bright nearby early type stars in different age groups have been examined. The mean plane of the stars younger than 20 million years was found to be inclined to the galactic plane by 19°, while the mean plane of the stars older than 60 million years is practically coincident with the galactic plane. LÄS MER

  3. 2. Spatial variability of geogenic contaminants in drinking water sources : Insights into hydrogeological controls, geospatial data for safe water supply and groundwater resource management

    Författare :J. Ijumulana; Prosun Bhattacharya; Felix Mtalo; Steve W. Lyon; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Drinking water; geogenic contaminants; potentially toxic elements; fluoride; spatial analysis; spatial variability; Tanzania; Land and Water Resources Engineering; Mark- och vattenteknik;

    Sammanfattning : The presence of geogenic contaminants in drinking water is a major health concern in many parts of the world. The interaction of groundwater with different rock types and sediments in the natural geochemical environment play an important role in controlling their mobility. LÄS MER

  4. 3. Interaktion i särskilt boende för personer med utvecklingsstörning och utmanande beteende

    Författare :Helena Antonsson; Sture Åström; Ulla Hällgren Graneheim; Mats Lundström; Mats Granlund; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Fysiska begränsningsåtgärder; interaktion; intervention; kommunikation; mixed methods; utmanande beteende; utvecklingsstörning; web-baserad utbildning; omvårdnadsforskning med medicinsk inriktning; Caring Sciences;

    Sammanfattning : Bakgrund: Många personer med utvecklingsstörning har kommunikativa svårigheter och har därför behov av att utveckla olika sätt att kommunicera för att kunna förstå andra och göra sig förstådda. Svårigheter i kommunikationen påverkar interaktionen mellan personer med utvecklingsstörning och deras vårdare. LÄS MER

  5. 4. Treeline dynamics in short and long term perspectives : observational and historical evidence from the southern Swedish Scandes

    Författare :Lisa Öberg; Bengt-Gunnar Jonsson; Leif Kullman; Aage Paus; Mittuniversitetet; []
    Nyckelord :Betula pubescens ssp. czerepanovii; Picea abies; Pinus sylvestris; Larix sibirica; climate; Betula pubescens ssp. czerepanovii; Picea abies; Pinus sylvestris; Larix sibirica;

    Sammanfattning : Treelines in high-mountain regions are constrained by heat deficiency, although the working mechanisms are still not entirely understood. Observational and paleoecological studies on treeline performance may contribute to increased understanding of the treeline phenomenon in general. LÄS MER

  7. 5. Wheelchair Passengers and Local Public Transport Vehicles: Perceptions of Safety and Comfort

    Författare :Anders Wretstrand; Trafik och väg; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Road transport technology; Public transport; Bus; STS; Perception; Comfort; Wheelchair users; Safety; Vägtransportteknik; Care and help to handicapped; Handikappade; vård och rehabilitering;

    Sammanfattning : Eliciting wheelchair-seated passengers’ perspective of safety and comfort is both useful and mandatory, particularly for researchers, clinicians, transit authorities, and for operators during purchase and use of vehicle technologies in existing and planned future transport systems. Therefore, the overarching objective of this thesis was to delineate the question of safety and comfort as perceived by wheelchair-seated passengers using public transport road vehicles. LÄS MER