Search for dissertations about: "Jörgen Olofsson"

Found 4 swedish dissertations containing the words Jörgen Olofsson.

  2. 1. The Earth : climate and anthropogenic interactions in a long time perspective

    Author : Jörgen Olofsson; Institutionen för naturgeografi och ekosystemvetenskap; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; anthropogenic; climate change; land use; biodiversity; carbon; dynamic global vegetation model; Holocene; pre-industrial; pollen; bison;

    Abstract : The Earth is a highly complex and dynamic system. Life has shaped the entire planet and evolved in response to living conditions. Ecosystems are heavily affected by climate. Rapidly changing conditions imply considerable stress on several species and ecosystems, as well as to the most dominant species on the planet. READ MORE

  4. 2. Developing and evaluating dose calculation models for verification of advanced radiotherapy

    Author : Jörgen Olofsson; Mikael Karlsson; Anders Ahnesjö; Crister Ceberg; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiation therapy; high-energy photons; dose calculation; multi-source model; pencil kernel; uncertainties; action levels; Radiological physics; Radiofysik;

    Abstract : A prerequisite for modern radiotherapy is the ability to accurately determine the absorbed dose (D) that is given to the patient. The subject of this thesis has been to develop and evaluate efficient dose calculation models for high-energy photon beams delivered by linear accelerators. READ MORE

  5. 3. Geometric distortions in MRI based radiotherapy and PET/MRI

    Author : Josef Lundman; Tufve Nyholm; Anne Larsson; Jörgen Olofsson; Marco Riboldi; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Magnetic resonance imaging; MRI; PET MR; PET MRI; medical imaging; radiotherapy; geometrical distortions; MR-only; MRI-only; radiofysik; radiation physics;

    Abstract : Magnetic resonance imaging (MRI) offers high soft-tissue contrast compared to computed tomography (CT). This contrast is helpful in many cases, not least for delineating tumours for radiotherapy treatment, and has led to increasing use in radiotherapy treatment planning (RTP). READ MORE

  6. 4. Advancing urban analytics for energy transitions : Data-driven strategic planning for citywide building retrofitting

    Author : Oleksii Pasichnyi; Olga Kordas; Jörgen Wallin; Fabian Levihn; Fredrik Gröndahl; Thomas Olofsson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Urban analytics; building energy data; building retrofitting; urban building energy modelling; data quality; data applications; strategic planning; decision-making; energy transitions; climate-neutral cities.; Міська аналітика; дані щодо стану енергоефективності будівель; енергоефективна модернізація будівель; моделювання енергосистеми міських будівель; якість даних; застосування даних; стратегічне планування; прийняття рішень; енергетичні переходи; кліматично-нейтральні міста.; Stadsanalys; byggnadsenergidata; renovering av byggnader; urbana energimodeller; datakvalitet; datatillämpningar; strategisk planering; beslutsfattande; energiomställning; hållbara städer; klimatneutrala städer.; Industriell ekologi; Industrial Ecology;

    Abstract : Decarbonisation of the building stock is essential for energy transitions towards climate-neutral cities in Sweden, Europe and globally. Meeting 1. READ MORE