Sökning: "magnetic compass"

Visar resultat 6 - 10 av 11 avhandlingar innehållade orden magnetic compass.

  1. 6. Hjälp mig att hjälpa dig! : upplevelser och uppfattningar av undersökning med MRT för personer med metastaser i ryggen

    Författare :Thomas Strand; Åsa Roxberg; Erna Törnqvist; Mikael Rask; Solveig Lundgren; Linnéuniversitetet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Magnetic resonance imaging; spinal metastasis; patient-centered care; Vårdvetenskap; Caring Science;

    Sammanfattning : Aim: The overall aim was to explore how patients with spinal metastasesexperience a magnetic resonance imaging examination (MRI). Furthermore,the purpose was to investigate the radiographers’ perceptions of the patients’care needs and what measures can be taken to relieve the suffering associatedwith an MRI examination. LÄS MER

  3. 7. Bird orientation: external cues and ecological factors

    Författare :Johan Bäckman; Evolutionär ekologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; tracking radar; Emlen funnel.; Animal ecology; Djurekologi; oscillatory orientation; roosting flight; scatter; concentration; heading; cue calibration; light dependent; magnetoreception; subcutaneous fat stores; body condition; energetics; geomagnetic field; visual cues; orientation; birds; migration;

    Sammanfattning : Birds are generally capable of accurate orientation. In this thesis I present studies about the external cues and the ecological factors that influences bird orientation. A multitude of environmental cues are used to select and maintain a proper direction. LÄS MER

  4. 8. Autonomous Localization in Unknown Environments

    Författare :Jonas Callmer; Fredrik Gustafsson; Paul Havinga; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Localization; indoor positioning; heading estimation; magnetometers;

    Sammanfattning : Over the last 20 years, navigation has almost become synonymous with satellite positioning, e.g. the Global Positioning System (GPS). On land, sea or in the air, on the road or in a city, knowing ones position is a question of getting a clear line of sight to enough satellites. LÄS MER

  5. 9. Avian migration: the role of geomagnetic cues

    Författare :Ian Henshaw; Cecilia Kullberg; Thomas Alerstam; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; geomagnetic cues; orientation; food intake; fuel deposition; corticosterone; endogenous time program; bird migration; Biology; Biologi; etologi; Ethology;

    Sammanfattning : The regularity and scale of bird migrations has impressed mankind for generations. Birds rely on an inherited migratory program to guide them during the journey; however, recent evidence suggests that additional external cues are necessary. LÄS MER

  7. 10. Coding to cure : NMR and thermodynamic software applied to congenital heart disease research

    Författare :Markus Niklasson; Patrik Lundström; Malin Lindqvist Appell; Björn Wallner; Katja Petzold; Malmendal Anders; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Regardless of scientific field computers have become pivotal tools for data analysis and the field of structural biology is not an exception. Here, computers are the main tools used for tasks including structural calculations of proteins, spectral analysis of nuclear magnetic resonance (NMR) spectroscopy data and fitting mathematical models to data. LÄS MER