Search for dissertations about: "niches"

Showing result 11 - 15 of 109 swedish dissertations containing the word niches.

  2. 11. Contours of Cognition

    Author : Trond A. Tjøstheim; Kognitiv modellering; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; computational; cognitive; neuroscience; perception; memory; spatial cognition; trust; pupil dynamics; reflection; thinking; intelligence; reinforcement learning; foraging; allostasis; decision making;

    Abstract : This thesis concerns the nature of cognition. It posits that cognitive processes primarily are means to maintain allostasis in organisms whose ecological niches require movement to approach food-resources and avoid predation. READ MORE

  4. 12. Human Bone Marrow Microenvironment in Health and Disease

    Author : Sandro Bräunig; Avdelningen för molekylär hematologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Hematopoietic microenvironment; Imaging; Myeloproliferative neoplasms; Spatial relationships; acute lymphoblastic leukaemia ALL ; Fibrosis; Mesenchymal stromal cell; Single cell RNA sequencing;

    Abstract : Hematopoietic stem cells (HSCs) are safeguarded from various threats such as stress, injury, or radiationwithin specialized microenvironments or niches within the bone marrow. In this thesis, we investigatedvarious facets of the bone marrow (BM) microenvironment and its critical role in hematopoiesis andrelated disorders. READ MORE

  5. 13. The Search for Life on Mars - Preparation for Sample Return

    Author : Tomas Hode; Stefan Bengtson; John Hayes; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap;

    Abstract : The purpose of the thesis work has been to develop methods and concepts to aid in the search, detection and assessment of ancient microfossils here on Earth as a guide to the search for ancient life on Mars. The intention has been to identify and characterize environments on Earth that may be considered analogous to Martian environments and in which fossil preservation is expected to be good, and to develop and apply methods to characterize the isotopic and chemical composition of possible traces of life in order to assess their biogenicity and biological affinities. READ MORE

  6. 14. Comparative genomics of the genus Mycobacterium : Genome evolution, phylogeny and diversity

    Author : Phani Rama Krishna Behra; Leif Kirsebom; Bengt Persson; Mikael Rhen; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Mycobacterial genomes; core gene phylogeny; tRNA and non-coding RNA; Biology with specialization in Molecular Biology; Biologi med inriktning mot molekylärbiologi;

    Abstract : The genus Mycobacterium includes more than 190 species, and many cause severe diseases such as tuberculosis and leprosy. According to the "World Health Organization", in year 2019 alone, 10 million people developed TB, and 1.4 million died. READ MORE

  7. 15. Small Firm Growth and Performance : Entrepreneurship and Beyond

    Author : Johan Wiklund; Jönköping University; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Abstract : Why is it that some small firms perform well and grow while others do not? Does entrepreneurship play a role in this process? These are the two principal questions addressed in this text.On the basis of an extensive literature review, variables enhancing and restricting small firm growth and performance were identified. READ MORE