Sökning: "and urban characterization"

Visar resultat 11 - 15 av 34 avhandlingar innehållade orden and urban characterization.

  1. 11. Controlled growth of hexagonal GaN pyramids and InGaN QDs

    Författare :Anders Lundskog; Erik Janzén; Urban Forsberg; Per-Olof Holtz; Lars-Erik Wernersson; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Gallium-nitride (GaN) and its related alloys are direct band gap semiconductors, with a wide variety of applications. The white light emitting diode (LED) is of particular importance as it is expected to replace energy inefficient light bulb and hazardous incandescent lamps used today. LÄS MER

  3. 12. Be Aware of the Indoor Air. Physicochemical Characterization of Airborne Fine Particles in Occupied Homes : Physicochemical Characterization of Airborne Fine Particles in Occupied Homes

    Författare :Yuliya Omelekhina; Metalund; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Ultrafine particles UFP ; PM2.5; Black carbon; Indoor sources; Occupied homes; energy renovation;

    Sammanfattning : Negative health effects of exposure to particles of outdoor origin have been confirmed by epidemiological studies. In developed countries, we spend on average 65% of our time in our homes. Thus, the properties of airborne particles indoors need to be understood. LÄS MER

  4. 13. Geometry-based Radio Channel Characterization and Modeling: Parameterization, Implementation and Validation

    Författare :Meifang Zhu; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The propagation channel determines the fundamental basis of wireless communications, as well as the actual performance of practical systems. Therefore, having good channel models is a prerequisite for developing the next generation wireless systems. This thesis first investigates one of the main channel model building blocks, namely clusters. LÄS MER

  5. 14. Born in fire, borne by air : Source attribution and physicochemical characterization of ship and ambient aerosols in the Baltic region

    Författare :Stina Ausmeel; MERGE: ModElling the Regional and Global Earth system; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; anthropogenic air pollution; aerosol; black carbon; plumes; ship emissions; absorption; source apportionment; climate; Fysicumarkivet A:2020:Ausmeel;

    Sammanfattning : Aerosol emissions from anthropogenic activities cause detrimental health effects and affect the climate system. Combustion is a large source of airborne fine particulate matter (PM2.5) and the uncertainties of the climate role of these emissions are still large. LÄS MER

  7. 15. Novel Methods for Sampling, Characterization and Analysis of Airborne Street Particles in a Health Perspective

    Författare :Ali Reza Nosratabadi; Anders Ljungman; Per Leandersson; Helen Karlsson; Peter Molnár; Henrik Kylin; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Fine; Coarse; wear particles; health; Lead; Cadmium; Brake wear particles; Endotoxin; Interleukins; TEOM; IPRL;

    Sammanfattning : Over the last decades, there has been much attention on air quality, especially in urban environments. A significant factor effecting the air quality in the urban environment is airborne particulate matter (PM). Long-term exposure to PM causes increased risk for heart disease, decreased lung function, exacerbation of asthma, and lung cancer. LÄS MER