Sökning: "rain"

Visar resultat 1 - 5 av 153 avhandlingar innehållade ordet rain.

  1. 1. Asthma : Respiratory Symptoms, Atopy and Bronchial Hyperresponsiveness in Young Adults in Estonia and Sweden

    Författare :Rain Jõgi; Amund Gulsvik; Uppsala universitet; []
    Nyckelord :Medical sciences; Asthma; atopic sensitisation; prevalence; epidemiology; ECRHS; MEDICIN OCH VÅRD; MEDICINE; MEDICIN; Medicine; medicin;

    Sammanfattning : Morbidity of asthma has increased over the world. The reasons for this increase have remained unclear. Studies in children have reported considerable East-West difference in the prevalence of atopy and respiratory allergies. LÄS MER

  2. 2. Atmospheric corrosion and runoff processes on copper and zinc as roofing materials

    Författare :Wenle He; KTH; []
    Nyckelord :atmospheric corrosion; corrosion rate; runoff rate; copper; zinc; field study; laboratory study; roof; first flush; rain quantity; rain intensity; rain pH; dry and wet deposition; corrosion and runoff process;

    Sammanfattning : An extensive investigation with parallel field andlaboratory exposures has been conducted to elucidateatmospheric corrosion and metal runoff processes on copper andzinc used for roofing applications. Detailed studies have beenperformed to disclose the effect of various parameters on therunoff rate including: surface inclination and orientation,natural patination (age), patina composition, rain duration andvolume, rain pH, and length of dry periods inbetween rainevents. LÄS MER

  3. 3. Driving rain tightness, intrusion rates and phenomenology of leakages in defects of façades: A new calculation algorithm

    Författare :Lars Olsson; Chalmers University of Technology; []
    Nyckelord :façade details; rain resistance; window-wall interface; EN 12865; protrusion; deficiency; catch area; water flow; obstacle; fenestration; dam; driving rain; water leakage; leakage flow; hole;

    Sammanfattning : This thesis presents the driving rain tightness of façades with façade details as well as the water leakage flows that can be expected. Furthermore, it describes the key mechanisms for water leakage in defects in the outermost layer of external walls. LÄS MER

  4. 4. Persistent organic pollutants in the atmosphere - spatial and temporal variations

    Författare :Cecilia Backe; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; tropical and temperate regions; global transport; temperature; latitudinal fractionation; fugacity; soil organic matter; soil-air exchange; washout ratio; rain; precipitation; atmosphere; spatial and temporal variations; DDT; PCB; persistent organic pollutants; polychlorinated biphenyls; Environmental chemistry; Miljökemi; Ecology; Ekologi; Chemistry; Kemi;

    Sammanfattning : In these thesis I have studied the spatial and temporal variations of PCBs in the atmosphere and in precipitation in southern Sweden. Further, soil-air exchange processes of PCBs were investigated. Finally, the long-range transport of PCBs and DDT was studied in the Baltic Sea region and in a tropical vs. a temporal region. LÄS MER

  5. 5. Rain Water Harvesting (RWH) North of Iraq

    Författare :Saleh Zakaria; Luleå tekniska universitet; []

    Sammanfattning : Rainwater harvesting is one of the methods that can ensure availability of water for winter crop in Iraq. Using this technique the excess rainwater (runoff) is stored in reservoirs of dams of different sizes. The water from these reservoirs can be used later when required to satisfy the crops requirements. LÄS MER