Sökning: "snakes"

Visar resultat 11 - 15 av 22 avhandlingar innehållade ordet snakes.

  1. 11. Nesting ecology of the grass snake (Natrix natrix) and its implications for conservation

    Författare :Kristin Löwenborg Di Marino; Mattias Hagman; Sören Nylin; Tobias Uller; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; agriculture; anthropogenic; climate; embryonic development; incubation; zoologisk ekologi; Animal Ecology;

    Sammanfattning : The onset of agriculture about 12,000 years ago has had a major influence on the biodiversity of plants and animals. Unfortunately, the rapid changes in agricultural practices that has occurred in recent times has negatively affected many farmland species. LÄS MER

  3. 12. Quantification of Arterial Wall with MRI and Image Processing

    Författare :Mari Hänni; Torbjörn Andersson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiology; image processing; Magnetic resonance imaging; animal model; arterial wall; Radiologisk forskning; atherosclerosis; Radiological research; Radiologisk forskning; Diagnostisk radiologi; Diagnostic Radiology;

    Sammanfattning : Quantification of atherosclerosis in vivo in animal models is of great importance when treatments against atherosclerosis are evaluated. In the studies presented in this thesis a non-invasive method combining MRI and image processing is evaluated. LÄS MER

  4. 13. Origin, evolution and biodiversity of the Neotropical herpetofauna: patterns and processes of the world’s richest and most threatened biota

    Författare :Josué Azevedo; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Amazonia; biodiversity indices; Cerrado; integrative taxonomy; phylogenetic endemism; phylogenetic turnover;

    Sammanfattning : The biological diversity of tropical America (the Neotropics) is astonishing. However, even among terrestrial vertebrates, most biogeographical patterns are not fully described nor understood, especially for many Neotropical reptiles and amphibians (the herpetofauna). LÄS MER

  5. 14. Pattern Recognition Methods for Oral Lesion Classification using Digital Color Images

    Författare :Artur Chodorowski; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; oral lesions; supervised classification; pattern recognition; computer-aided diagnosis; support vector machines; color; cancer; shape;

    Sammanfattning : The present thesis addresses the development and application of pattern recognition methods for classification of oral lesions using digital color images as input. The human oral cavity is a site of numerous diseases and two of the common and visually similar lesions are oral leukoplakia and oral lichenoid reactions. LÄS MER

  7. 15. Guided by Fear : Effects on attention and awareness

    Författare :Nathalie Peira; Stefan Wiens; Nazanin Derakhshan; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Emotion; fear; attention; awareness; affective processing; heart rate; skin conductance; Psychology; Psykologi; Psychology; psykologi;

    Sammanfattning : Because the visual system has limited capacity, emotions such as fear may play an important role in guiding the selection of relevant input (LeDoux, 2000; Öhman & Mineka, 2001). The aim of the current thesis was to investigate how fear can guide the organism by influencing:  (I) attentional processes, (II) awareness of the visual input, and (III) affective processing independent of awareness. LÄS MER