Sökning: "natural sources"

Visar resultat 16 - 20 av 1616 avhandlingar innehållade orden natural sources.

  1. 16. Particle emissions from residential wood and biodiesel combustion

    Författare :Robin Nyström; Christoffer Boman; Dan Boström; Markus Broström; Michael Strand; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Combustion; biomass; wood; biodiesel; particulate matter; emissions; aerosols; physicochemical properties; size distribution; PAH;

    Sammanfattning : Emissions from anthropogenic combustion sources, such as vehicles and biomass combustion, contribute significantly to ambient particulate matter (PM) both on a local and global scale. Exposure to ambient PM and air pollution in general is linked to a variety of different health effects and it has been estimated that as many as 2. LÄS MER

  3. 17. Advanced Materials for Rechargeable Lithium Batteries

    Författare :Jae-Kwang Kim; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Rechargeable lithium battery; rate capability; Organic electrode; cycle stability.; Ionic liquid-based polymer electrolyte; electrochemical stability;

    Sammanfattning : Lithium rechargeable batteries have gained much attention in the pursuit for alternative energy sources because of advantages such as high energy density and high electric potential. In addition, the development of low-cost materials has been of interest to reduce the cost of batteries, especially those destined for transportation applications such as electric (EVs) or hybrid-electric vehicles (HEVs). LÄS MER

  4. 18. The Invisible Tools of a Timber Framer - A survey of principles, situations and procedures for marking

    Författare :Ulrik Hjort Lassen; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; timber framing; marking; procedures; procedural description; scribing; craft skills; craft research; working methods; layout; developed drawing; compound joinery; invisible tools; practice-led;

    Sammanfattning : My thesis focuses on the marking procedures when building timber frames, from the idea of a construction to the cutting of the timbers. The marking procedures are essential parts of the building process, and without markings you don’t know where to cut. LÄS MER

  5. 19. Skolehuset som kulturminne - Lokale verdier og nasjonal kulturminneforvaltning

    Författare :Leidulf Mydland; Göteborgs universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; NATURVETENSKAP; NATURAL SCIENCES; Culture heritage management; local heritage values; national heritage values; schoolhouse; education history; enlightenment; nation building;

    Sammanfattning : The aim of this work is to analyse how buildings linked to public education, nation building and democratisation, have been esteemed as heritage within a local context and by authorised heritage authorities. This comprehensive task is carried out by investigating how a group of these buildings, the one-room schoolhouses, is managed as object of heritage and ascribed with heritage values by the local communities and the national heritage authorities. LÄS MER

  7. 20. The Importance of Dosimetry and Radiobiology in Nuclear Medicine : Quantitative methods and modelling

    Författare :Anna Stenvall; Lund Medicinsk strålningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear medicine; radionuclide therapy; radiopharmaceutical therapy; dosimetry; Monte Carlo modelling; radiobiology; ; γH2AX; DOTA-TATE; PET; SPECT;

    Sammanfattning : Nuclear medicine uses radioactive pharmaceuticals for diagnostic or therapeutic purposes. The ionizing radiation emitted from the radiopharmaceutical is partially absorbed within the patient's body and internal dosimetry is the method to estimate the absorbed dose to a tumour or risk organ. LÄS MER