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Université de Neuchâtel

Evolution of a local population of a multiple-strain pathogen in its vector

Durand, Jonas ; Voordouw, Maarten (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2016.

Mixed-strain infections are the rule rather than the exception in most infectious diseases, and have important implication for the ecology and evolution of pathogens. The presence of multiple strains results in competitive interactions that can have a strong impact on the population structure of the pathogen. In vector-borne diseases, most of the research on competition between pathogen strains...

Université de Fribourg

Kooperation von Schule und Familie aus Sicht der Eltern von Kindern mit Lese-Rechtschreib-Schwierigkeiten : Eine qualitative Untersuchung der elterlichen Perspektive auf die Zusammenarbeit von Fachpersonen der Primarschule und Eltern, deren Kinder von Lese-Rechtschreib-Schwierigkeiten (LRS) betroffen sind

Kern, Maja ; Stamm, Margrit (Dir.)

Thèse de doctorat : Université de Fribourg, 2017.

Die Zusammenarbeit von Schule und Familie hat in der heutigen Bildungslandschaft einen hohen Stellenwert. Weil Bildung und Erziehung im Bereich der geteilten Verantwortung von Schule und Elternhaus liegen, die Aufgabenteilung aber nicht immer klar geregelt ist und zuweilen unterschiedliche Ansichten aufeinander prallen, birgt die Kooperation grosses Konfliktpotential. Bei Lernschwierigkeiten des...

Université de Neuchâtel

The novel chloroplast outer membrane kinase KOC1 is a required component of the plastid protein import machinery

Zufferey-Arias, Mónica Alexandra ; Kessler, Felix (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

The chloroplast constitutes the site of photosynthesis and is an essential organelle in plant cells. An endosymbiotic event was at the origin of the chloroplast, an ancestral eukaryotic cell engulfing a photosynthetic cyanobacterium. During evolution, the majority of ancestral chloroplast genes were lost or transferred to the nucleus. The protein products of the successfully transferred genes are...

Université de Neuchâtel

Uncertainty propagation and global sensitivity analysis in multi-layered hydrogeological models of flow and lifetime expectancy

Deman, Grégory ; Perrochet, Pierre (Dir.) ; Kerrou, Jaouher (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2015.

The main focus of this thesis is the uncertainty propagation (UP) and global sensitivity analysis (GSA) in complex hydrogeological numerical models. Various methods are presented with applications on numerical models for the groundwater flow and mean lifetime expectancy (MLE) in the scope of Andra's (French National Radioactive Waste Management Agency) project for the geological disposal of...

Université de Neuchâtel

Des formes d'humus au bois mort et du bois mort aux formes d'humus : contribution à l'étude des formes d'humus et des communautés lombriciennes en zone forestière subalpine, avec une emphase particulière sur le bois mort

Tatti, Dylan ; Gobat, Jean-Michel (Dir.) ; Le Bayon, Claire (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2016.

Cette thèse s’inscrit dans une recherche plus vaste, le projet DecAlp. Celui-ci se déroule dans les Alpes italiennes (province de Trente) et est mené conjointement par de nombreux chercheurs. Il a pour principal objectif l’élaboration d’un modèle de décomposition et d’intégration du bois mort au sol. Cette thèse y occupe une place centrale en se concentrant sur les formes...

Université de Neuchâtel

The mate-seeking strategies of four braconid parasitoids (Hymenoptera: Braconidae)

Xu, Hao ; Turlings, Ted (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

Parasitic wasps are widely used as biological control agents. To optimize their applications in agriculture, we need to understand how they locate hosts and mate. Parasitic wasps have about 50,000 described species, but less than 30 species have so far been tested in terms of their use of pheromones. In this thesis, I used a combination of bioassays, chemical analyses, and electrophysiological...

Université de Neuchâtel

Pyrrolizidine alkaloids : occurrence in bee products and impact on Honeybees ("Apis mellifera" L.)

Lucchetti, Matteo Angelo ; Turlings, Ted (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

Pyrrolizidine alkaloids (PAs) are toxic plant secondary metabolites produced as defense against herbivores by a wide variety of plants, mainly of the Boraginaceae, Asteraceae and Fabaceae families. Consumption of products contaminated with PAs may lead to hepatotoxic, carcinogenic, genotoxic and teratogenic effects in animals and humans. PAs are mostly found in leaves, roots and seeds, and may...

Université de Neuchâtel

Impact of environment on co-evolution between hosts and parasites

Zeller, Michael ; Koella, Jacob (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2016.

Many parasites cause pathology and mortality and can be a major source of selection on their hosts, creating strong selection pressures on the evolution of hosts defense strategies. Changes in the host’s tolerance and resistance to pathogen can strongly influence the spread of a disease and hence influence selection on virulence. Understanding how ecological conditions influence the host’s...

Université de Neuchâtel

Strategic social behaviour in wild vervet monkeys

Borgeaud, Christèle ; Bshary, Redouan (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2016.

In comparison to other vertebrates, primates have a large brain in relation to their body size. It has been hypothesised that the degree of social complexity is the major predictor for such variation. In group living species, individuals face various social challenges which can include finding the right balance between cooperation and competition with other group members. Thus to survive and...

Università della Svizzera italiana

Online disturbance prediction for enhanced availability in smart grids

Kaitovic, Igor ; Malek, Miroslaw (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2017 ; 2017INFO011.

A gradual move in the electric power industry towards Smart Grids brings new challenges to the system's efficiency and dependability. With a growing complexity and massive introduction of renewable generation, particularly at the distribution level, the number of faults and, consequently, disturbances (errors and failures) is expected to increase significantly. This threatens to compromise...