Search for dissertations about: "PhD thesis on air"

Showing result 1 - 5 of 93 swedish dissertations containing the words PhD thesis on air.

  2. 1. Error reduction strategies for quantitative PET with focus on hybrid PET/MRI

    Author : Elin Wallstén; Anne Larsson; Jan Axelsson; Katrine Riklund; Ronald Boellaard; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Positron emission tomography; PET; PET MR; PET MRI; medical imaging; partial-volume effect; attenuation correction; radiofysik; radiation physics;

    Abstract : Positron Emission Tomography (PET) is an important tool for detection, staging and follow-up in a wide range of diseases, including cancer and neurological disorders. As a functional imaging tool, PET can visualize biological processes, where positron emitting radioactive isotopes are connected to molecules with different functions in the body. READ MORE

  4. 2. Underwater Electrical Connections and Remotely Operated Vehicles

    Author : Flore Remouit; Jens Engström; Jens Abrahamsson; Simon Lindroth; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Remotely Operated Vehicles (ROVs) are underwater robots that perform different kind of operations, from observation to heavier tasks like drilling, carrying and pulling cables, etc. Those ROVs are costly and require skilled personal to operate it as well as equipment for transportation and deployment (boats, cranes, etc.). READ MORE

  5. 3. Multiple perspectives on absorbing aerosols over the northern Indian Ocean and Asia

    Author : Friederike Höpner; Frida Bender; Annica Ekman; Heike Wex; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; aerosols; black carbon; air pollution; South Asia; atmosfärvetenskap och oceanografi; Atmospheric Sciences and Oceanography;

    Abstract : Aerosol particles in the atmosphere scatter and absorb solar radiation, and thereby affect the Earth's energy budget, but the magnitude of the overall radiative effect due to aerosol-radiation interactions is uncertain. In particular, the impact of absorbing aerosol particles, mainly black carbon (BC), organic carbon and dust, is not completely understood. READ MORE

  6. 4. Functionalized epitaxial graphene as versatile platform for air quality sensors

    Author : Marius Rodner; Jens Eriksson; Andreas Schütze; Anton Köck; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The work presented in this thesis focuses on epitaxial graphene on SiC as a platform for air quality sensors. Several approaches have been tested and evaluated to increase the sensitivity, selectivity, speed of response and stability of the sensors. READ MORE

  7. 5. Impacts of global change on primary production in northern lakes

    Author : Isolde Callisto Puts; Ann-Kristin Bergström; Jenny Ask; Tom H. Andersen; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Primary production; global change; warming; browning; lake; carbon dioxide; organic carbon; inorganic carbon; boreal; arctic; DOC; DIC; CO2; allochthonous organic carbon; benthic; periphyton; environmental change; miljöförändringar; environmental science; miljövetenskap; biology; biologi; climate change; klimatförändringar;

    Abstract : Algae are primary producers, a major component of the aquatic foodweb, and changes in primary production affect aquatic ecology in general. Global changes such as warming, recovery of acidification and changes in land-use have caused warming and browning of northern lakes. READ MORE