Sökning: "Ledtrådar"

Visar resultat 16 - 20 av 47 avhandlingar innehållade ordet Ledtrådar.

  1. 16. Adaptive flexibility in migratory behaviour of shorebirds

    Författare :Johanna Grönroos; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bird migration; compensation; departure decision; flight distance; migration speed; migration strategy; orientation; shorebird; stopover; wind drift; wind selectivity;

    Sammanfattning : The phenomenon of bird migration has long fascinated us humans and it has prompted questions like where do they go or come from and how do they find their way? Arctic shorebirds are well known for their spectacular long-distance migrations with some species travelling more than 10 000 km every spring and autumn, and some even cover this distance in one single nonstop flight. The aim of my thesis was to investigate the flexibility of Arctic shorebirds when it comes to orientation behaviour, departure behaviour and migration strategy. LÄS MER

  3. 17. A Chloroplast Localized Small Heat Shock Protein, Hsp21. Importance of Hsp21 in stress protection of transgenic Arabidopsis thaliana, recombinant expression and characterization of oxidation-dependent conformational changes

    Författare :Ulrika Härndahl; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; a-crystallin; sHsp; chaperone; amphipathic a-helix; oligomer; redox-regulated; methionine sulfoxidation; oxidative stress; regulation; protein structure; circular dichroism; mass spectrometry; fluorescence spectroscopy; Biochemistry; Metabolism; Biokemi;

    Sammanfattning : A specific group of heat shock proteins, the so called small heat shock proteins (sHsps), exists in all organisms but are especially abundant in plants. The sHsps prevent aggregation of other proteins (substrate proteins) during transient heat and oxidative stress. LÄS MER

  4. 18. An X-Ray View of Core-collapse Supernovae

    Författare :Dennis Alp; Josefin Larsson; Jacco Vink; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Atomic; Subatomic and Astrophysics; Atomär fysik; subatomär fysik och astrofysik;

    Sammanfattning : A core-collapse supernova (CCSN) is an astronomical explosion that indicates the death of a massive star. From observations, it is clear that a large fraction of all massive stars undergoes supernova (SN) explosions, but describing how SNe explode has remained a challenge for many decades. LÄS MER

  5. 19. Hur mjölk i tanken blir kronor på banken : Bondförnuftets rationalitet

    Författare :Fredrika Askenmalm; Andreas Jansson; Ulf Larsson Olaison; Caroline Aggestam Pontoppidan; Jönköping University; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : Lantbrukare har under senare år ofta hörts framföra klagomål om att den administrativa bördan blivit allt tyngre vad gäller rapportering och ansökningar som ska göras till olika myndigheter. Tidigare forskning framställer det som att den administrativa bördan skulle kunna utsträckas till att också gälla redovisning, så som bokföring, kalkylering och budgetering. LÄS MER

  7. 20. Cognitive Interactive Robot Learning

    Författare :Benjamin Fonooni; Hellström Thomas; Lars Erik Janlert; Christian Balkenius; Umeå universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Learning from Demonstration; Imitation Learning; Human Robot Interaction; High-Level Behavior Learning; Shared Control; Cognitive Architectures; Cognitive Robotics; Priming; business data processing; administrativ databehandling;

    Sammanfattning : Building general purpose autonomous robots that suit a wide range of user-specified applications, requires a leap from today's task-specific machines to more flexible and general ones. To achieve this goal, one should move from traditional preprogrammed robots to learning robots that easily can acquire new skills. LÄS MER