Search for dissertations about: "AT 502"

Showing result 16 - 20 of 31 swedish dissertations containing the words AT 502.

  2. 16. Characterization of the MRI patient exposure environment and exposure assessment methods for magnetic fields in MRI scanners

    Author : Jennifer Frankel; Jonna Wilén; Anders Garpebring; Johan Olsrud; Peter Lundberg; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; electromagnetic fields; exposure assessment; magnetic resonance imaging; switched gradient fields; radiofrequency fields; exposure metrics; radiofysik; radiation physics;

    Abstract : Magnetic resonance imaging (MRI) has become one of the most common imaging modalities available in modern medicine, and it is an indispensable diagnostic tool thanks to the unparalleled soft-tissue contrast and high image resolution. It is also a unique exposure environment consisting of a complex mix of magnetic fields. READ MORE

  4. 17. Energy efficient multi-robot coordination

    Author : Oskar Wigström; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; scheduling; optimization; hybrid systems; multi-robot systems; energy minimization;

    Abstract : When multiple systems work in the same physical environment, it is important to ensure that no collisions occur. This thesis is focused on the centralized offline coordination of such collaborating systems, with the condition that the spatial path each system travels along is known before hand. READ MORE

  5. 18. Arctic Offshore Hydrocarbon Resource Development : Past, Present and Vision of the Future

    Author : Maria Morgunova; Vladimir Kutcherov; Rurik Holmberg; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HUMANIORA; HUMANITIES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Arctic; oil and natural gas; resource development; investment trends; offshore technology; production volume; projection; historical framework; Industriell ekonomi och organisation; Industrial Engineering and Management;

    Abstract : Energy issues have always been on the global economics and geopolitics agenda, even though energy sources have been changing over time.In recent years, the awareness of Arctic offshore oil and natural gas development has escalated, yielding economic opportunities and incurring risks. READ MORE

  6. 19. Process Industry Energy Projects in a Climate Change Conscious Economy

    Author : Anders Ådahl; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; process Integration; pulp mill; Nordic countries; energy market; climate policy; CO2; energy savings; biofuel;

    Abstract : Most industrial process plants consume large amounts of energy (usually in the form of steam and electricity) to produce demanded goods, such as beer or paper. However, combustion of fossil fuels has negative external effects on the Earths climate. READ MORE

  7. 20. Characterisation of brain electrodes for ablative neurosurgery

    Author : Ola Eriksson; Linköpings universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : Stereotactic ablative neurosurgery with radio frequency current is regularly performed on patients with movement disorders, for instance Parkinson's disease. Even though the technique has been used for ablation in the brain for almost 50 years, nobody has suggested a standardised way of testing the electrodes used for ablative surgery. READ MORE