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Université de Neuchâtel

Semantic content in titi monkey alarm call sequences

Berthet, Mélissa ; Zuberbühler, Klaus (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

The comparative approach aims to understand the uniqueness of human language and how it evolved from primitive communication systems. Black-fronted titi monkeys Callicebus nigrifrons possess two soft alarm calls: A-calls are specific to threats within the canopy while B-calls are general calls emitted to terrestrial predators but also in non-predatory contexts, while moving near the...

Université de Neuchâtel

A geostatistical approach to the simulation of stacked channels

Rongier, G ; Collon, P ; Renard, Philippe

In: Marine and Petroleum Geology, 2017, vol. 82, p. 318-335

Turbiditic channels evolve continuously in relation to erosion-deposition events. They are often gathered into complexes and display various stacking patterns. These patterns have a direct impact on the connectivity of sand-rich deposits. Being able to reproduce them in stochastic simulations is thus of significant importance. We propose a geometrical and descriptive approach to stochastically...

Université de Neuchâtel

Genome Sequence of Kosakonia radicincitans Strain YD4, a Plant Growth-Promoting Rhizobacterium Isolated from Yerba Mate (Ilex paraguariensis St. Hill.)

Bergottini, Veronica M ; Filippidou, Sevasti ; Junier, Thomas ; Johnson, Shannon ; Chain, Patrick S ; Otegui, Monica B ; Zapata, Pedro D ; Junier, Pilar

In: Genome Announcements, 2015, vol. 3, no. 2, p. e00239-15

Kosakonia radicincitans strain YD4 is a rhizospheric isolate from yerba mate (Ilex paraguariensis St. Hill.) with plant growth-promoting effects on this crop. Genes involved in different plant growth-promoting activities are present in this genome, suggesting its potential as a bioinoculant for yerba mate.

Université de Neuchâtel

Bio-inoculation of yerba mate seedlings (Ilex paraguariensis St. Hill.) with native plant growth-promoting rhizobacteria : a sustainable alternative to improve crop yield

Bergottini, Veronica M ; Otegui, M. B ; Sosa, D. A ; Zapata, P. D ; Mulot, Matthieu ; Rebord, Maxime ; Zopfi, Jakob ; Wiss, F ; Benrey, Betty ; Junier, Pilar

In: Biology and fertility of soils, 2015, vol. 51, no. 6, p. 749-755

In this study, the role of native plant growth-promoting rhizobacteria (PGPR) as bio-inoculants was assessed as an alternative to ameliorate Ilex paraguariensis St. Hill. growth in nursery comparing poorer (soil) versus richer (compost) substrates. Twelve rhizospheric strains isolated from yerba mate plantations were evaluated in vitro for their potential as PGPRs. Three isolates,...

Université de Neuchâtel

Large scale geometry of box spaces

Delabie, Thiebout ; Valette, Alain (Dir.) ; Khukhro, Ana (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

Box spaces are metric space that are constructed using group. They are useful as examples of metric spaces with exceptional large scale geometric properties. In this thesis we further investigate box space.

Université de Neuchâtel

Hydrogeological characterization of karst aquifers in Switzerland using a pragmatic approach

Malard, Arnauld ; Jeannin, Pierre-Yves (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

Recent studies reveal that karst aquifers represent a significant part of the Swiss groundwater reserve (120 km3) and resource (8.4 km3/year), although they only extend over 20% of the territory. On the one hand, high infiltration rates and large permeabilities of karstified rocks make karst aquifers highly interesting for water management. On the other hand, karst...

Université de Neuchâtel

Isoperimetric inequalities for Laplace and Steklov problems on Riemannian manifolds

Pétiard, Luc ; Colbois, Bruno (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2019.

This thesis is about the spectra of the Laplacian and of the Dirichlet-to-Neumann operators on a compact Riemannian manifold. Both problems have physical interpretations that can be found in [Eva 1998] and [Ban 1980]. We focused on finding upper bounds for the eigenvalues, based on the geometry of the manifold. More precisely, we consider if it is possible to obtain upper bounds in which the...

Université de Neuchâtel

Hydrogeological and topographical controls on catchment dynamics and their implications for low flows

Carlier, Claire ; Brunner, Philip (Dir.) ; Hunkeler, Daniel (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

Periods with scarce precipitation will likely occur more frequently and last longer under changing climatic conditions, even in relatively humid regions like Switzerland. To assess the sensitivity of water resources to dry spells and to identify regions that might experience water scarcity issues, a thorough understanding of the mechanisms governing catchment dynamics in the absence of rain is...

Université de Neuchâtel

Predicting the spatial correlation of daily streamflows to understand the hydrological response of river networks

Betterle, Andrea ; Schirmer, Mario (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

Rivers are fascinating expressions of the hydrological cycle and their waters, riparian areas and floodplains harbor a multitude of ecosystems. The potential for rivers to sustain life depends on the dynamics of water quantity – and quality – that are critically controlled by catchment-scale geomorphoclimatic processes. In particular, the temporal and spatial availability of streamflows is...

Université de Neuchâtel

Distinct element method simulation of an analogue for a highly interlocked, non-persistently jointed rockmass

Bahrani, N ; Kaiser, P.K ; Valley, Benoît

In: International Journal of Rock Mechanics & Mining Sciences, 2014, vol. 71, p. 117-130

A grain-based distinct element model is used to reproduce the laboratory response of both intact and granulated Wombeyan marble. The term “granulated” refers to a heat treated marble where the cohesion of grain boundaries has been destroyed. The unconfined compressive strength granulated marble is less than 50% of that of intact marble, while the strength of the granulated marble increases to...