Search for dissertations about: "Olfactory search"

Showing result 1 - 5 of 14 swedish dissertations containing the words Olfactory search.

2. 1. Machine Learning Techniques with Specific Application to the Early Olfactory System

   Author : Benjamin Auffarth; Anders Lansner; Tony Lindeberg; Tim Pearce; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; feature selection; image features; pattern classification; relevance; redundancy; distributional similarity; divergence measure; genetic algorithms; clustering algorithms; annealing; olfactory coding; olfactory bulb; odorants; glomeruli; property-activity relationship; olfaction; plasticity; axonal guidance; odor category; perception; spatial coding; population coding; memory organization; odor quality; SRA - ICT; SRA - Informations- och kommunikationsteknik;

   Abstract : This thesis deals with machine learning techniques for the extraction of structure and the analysis of the vertebrate olfactory pathway based on related methods. Some of its main contributions are summarized below. READ MORE

4. 2. The importance of search behavior and movements for spatial distributions of herbivorous insects

   Author : Petter Andersson; Peter Hambäck; Johan Ehrlén; Tomas Roslin; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Olfactory search; Habitat heterogeneity; Species-traits; Immigration; Scaling relationships; Patch size; Plant-insect interactions; EAG; Odors; Pheromones; Plant Ecology; växtekologi;

   Abstract : Insect populations commonly show large spatial variation in density, and much variation have been shown to be explained by the search behavior applied by the insect when locating habitat patches. This thesis explores the importance of odor-mediated attraction for immigration rates of herbivorous insects in relation to the size of the patches and the density of host plants within the patches. READ MORE

5. 3. Olfactory cues and insects - scaling relations and immigration rates

   Author : Petter Andersson; Stockholms universitet; []
   Keywords : växtekologi; Plant Ecology;

   Abstract : For herbivorous insects, location of host plants and habitat patches strongly depend on the type of sensory cue that is used during the search process and the probability of detecting a patch depends on the relative attraction between patches of different size. The visual impression of a patch increases predictably with the patch diameter and consequently, immigration rates of visually searching insects are often predicted by the scaling to patch size of visual cues. READ MORE

6. 4. Evolutionary and mechanistic aspects of insect host plant preference

   Author : Alexander Schäpers; Niklas Janz; Steven Heard; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; host plant choice; host range; diet breadth; butterfly; oviposition; specialist; generalist; insect-plant interaction; search behavior; olfaction; decision making; evolution; parasite-host interaction; zoologisk ekologi; Animal Ecology;

   Abstract : Plant feeding insects comprise about 25% of all animal species on earth and play an important role in all ecosystems. Although we understand that their association with plants is a key-factor driving the diversification in this group, we still have large gaps in our knowledge of the underlying processes of this relationship. READ MORE

7. 5. An object's smell in the multisensory brain : how our senses interact during olfactory object processing

   Author : Danja K Porada; Karolinska Institutet; Karolinska Institutet; []
   Keywords : ;

   Abstract : Object perception is a remarkable and fundamental cognitive ability that allows us to interpret and interact with the world we are living in. In our everyday life, we constantly perceive objects–mostly without being aware of it and through several senses at the same time. READ MORE