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Université de Fribourg

A comparative analysis of the predictive abilities of economic complexity metrics using international trade network

Liao, Hao ; Vidmer, Alexandre

In: Complexity, 2018, p. -

The complex networks approach has proven to be an effective tool to understand and predict the evolution of a wide range of complex systems. In this work, we consider the network representing the exchange of goods between countries: the international trade network. According to the type of goods they export, the complex networks approach allows inferring which countries will have a bigger...

Université de Fribourg

Spectral properties from Matsubara Green’s function approach: Application to molecules

Schüler, Michel ; Pavlyukh, Y.

In: Physical Review B, 2018, vol. 97, no. 11, p. 115164

We present results for many-body perturbation theory for the one-body Green's function at finite temperatures using the Matsubara formalism. Our method relies on the accurate representation of the single-particle states in standard Gaussian basis sets, allowing to efficiently compute, among other observables, quasiparticle energies and Dyson orbitals of atoms and molecules. In particular, we...

Université de Fribourg

The cuticle mutant eca2 modifies plant defense responses to biotrophic and necrotrophic pathogens and herbivory insects

Blanc, Catherine ; Coluccia, Fania ; L?Haridon, Floriane ; Torres, Martha ; Ortiz-Berrocal, Marlene ; Stahl, Elia ; Reymond, Philippe ; Schreiber, Lukas ; Nawrath, Christiane ; Métraux, Jean-Pierre ; Serrano, Mario

In: Molecular Plant-Microbe Interactions, 2017, vol. 31, no. 3, p. 344–355

We isolated previously several Arabidopsis thaliana mutants with constitutive expression of the early microbe-associated molecular pattern–induced gene ATL2, named eca (expresión constitutiva de ATL2). Here, we further explored the interaction of eca mutants with pest and pathogens. Of all eca mutants, eca2 was more resistant to a fungal pathogen (Botrytis cinerea) and a bacterial pathogen...

Université de Fribourg

Information filtering in evolving online networks

Chen, Bo-Lun ; Li, Fen-Fen ; Zhang, Yong-Jun ; Ma, Jia-Lin

In: Physics Letters A, 2018, vol. 382, no. 5, p. 265–271

Recommender systems use the records of users' activities and profiles of both users and products to predict users' preferences in the future. Considerable works towards recommendation algorithms have been published to solve the problems such as accuracy, diversity, congestion, cold-start, novelty, coverage and so on. However, most of these research did not consider the temporal effects of the...

Université de Neuchâtel

Using testate amoeba community structure and functional diversity to assess the impact of climate changes on ecosystem functioning : finding relevant and convenient tools for bio-monitoring of "Sphagnum" peatlands evolution or recovery

Koenig, Isabelle ; Mitchell, Edward AD (Dir.) ; Le Bayon, Claire (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

L’impact grandissant de l’homme sur les écosystèmes et les changements climatiques en cours font disparaître nombre de milieux naturels dans le monde. Il est aujourd’hui acquis que les écosystèmes naturels et la biodiversité ont un rôle important dans le bien-être de l’humanité et que les services qu’ils rendent ont une valeur monétaire qui peut être estimée (services...

Université de Fribourg

Surround inhibition in the primary motor cortex is task-specifically modulated in non-professional musicians but not in healthy controls during real piano playing

Márquez, Gonzalo ; Keller, Martin ; Lundbye-Jensen, Jesper ; Taube, Wolfgang

In: Neuroscience, 2018, vol. 373, p. 106–112

Research has indicated that at the onset of a finger movement, unwanted contractions of adjacent muscles are prevented by inhibiting the cortical areas representing these muscles. This so-called surround inhibition (SI) seems relevant for the performance of selective finger movements but may not be necessary for tasks involving functional coupling between different finger muscles. Therefore,...

Université de Fribourg

Age-related differences in cortical and subcortical activities during observation and motor imagery of dynamic postural tasks: an FMRI study

Mouthon, Audrey ; Ruffieux, Jan ; Mouthon, Michael ; Hoogewoud, Henri-Marcel ; Annoni, Jean-Marie ; Taube, Wolfgang

In: Neural Plasticity, 2018, p. -

Age-related changes in brain activation other than in the primary motor cortex are not well known with respect to dynamic balance control. Therefore, the current study aimed to explore age-related differences in the control of static and dynamic postural tasks using fMRI during mental simulation of balance tasks. For this purpose, 16 elderly (72 ± 5 years) and 16 young adults...

Université de Fribourg

17-β estradiol increases parvalbumin levels in Pvalb heterozygous mice and attenuates behavioral phenotypes with relevance to autism core symptoms

Filice, Federica ; Lauber, Emanuel ; Vörckel, Karl Jakob ; Wöhr, Markus ; Schwaller, Beat

In: Molecular Autism, 2018, vol. 9, p. 15

Autism spectrum disorder (ASD) is a group of neurodevelopmental disorders characterized by two core symptoms: impaired social interaction and communication, and restricted, repetitive behaviors and interests. The pathophysiology of ASD is not yet fully understood, due to a plethora of genetic and environmental risk factors that might be associated with or causal for ASD. Recent findings...

Université de Fribourg

Integrase-mediated recombination of the bel-1 gene cassette encoding the extended-spectrum β-lactamase BEL-1

Bouheraoua, Nacim ; Poirel, Laurent ; Bourreau, Baptiste ; Bonnin, Rémy ; Laroche, Laurent ; Naas, Thierry ; Nordmann, Patrice

In: Antimicrobial Agents and Chemotherapy, 2018, p. AAC.00030-18

Integrons are genetic elements that can acquire and rearrange gene cassettes. The blaBEL-1 gene encodes an extended-spectrum β-lactamase, BEL-1, that is present at second position of the variable region of class 1 integrons identified in Pseudomonas aeruginosa. The mobility of the bel-1 gene cassette was analyzed in physiological conditions and with the integrase gene being overexpressed....