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Haute Ecole pédagogique Fribourg

Changements climatiques et transition énergétique : complexité, approche systémique et cartes conceptuelles

Pellaud, Francine

In: Revue francophone du développement durable, 2017, no. 9, p. 99-111

Où se situe la complexité dans notre quotidien, mais également dans les objectifs institutionnels de l’école obligatoire ? Quels sont les enjeux de cette appréhension / compréhension de la complexité ? La complexité se limite-t-elle à l’approche systémique ? Cette dernière suffit-elle à définir le développement durable (DD) et l’éducation en vue d’un développement...

Université de Neuchâtel

Etre élève et exprimer une pensée propre: un paradoxe ?

Breux, Stéphanie ; Perret-Clermont, Anne-Nelly

In: Enseignement du français: les apports de la recherche en linguistique. Réflexions en l'honneur de Marie-José Béguelin, 2014, p. 327-340

Université de Fribourg

How do the global stock markets influence one another? Evidence from finance big data and Granger causality directed network

Tang, Yong ; Xiong, Jason Jie ; Luo, Yong ; Zhang, Yi-Cheng

In: International Journal of Electronic Commerce, 2019, vol. 23, no. 1, p. 85–109

The recent financial network analysis approach reveals that the topologies of financial markets have an important influence on market dynamics. However, the majority of existing Finance Big Data networks are built as undirected networks without information on the influence directions among prices. Rather than understanding the correlations, this research applies the Granger causality test to...

Université de Fribourg

Comparative study of nonequilibrium insulator-to-metal transitions in electron-phonon systems

Sayyad, Sharareh ; Žitko, Rok ; Strand, Hugo U. R. ; Werner, Philipp ; Golež, Denis

In: Physical Review B, 2019, vol. 99, no. 4, p. 045118

We study equilibrium and nonequilibrium properties of electron-phonon systems described by the Hubbard-Holstein model using dynamical mean-field theory. In equilibrium, we benchmark the results for impurity solvers based on the one-crossing approximation and slave-rotor approximation against non-perturbative numerical renormalization group reference data. We also examine how well the...

Université de Fribourg

Particle-conserving dynamics on the single-particle level

Schindler, T. ; Wittmann, René ; Brader, Joseph M.

In: Physical Review E, 2019, vol. 99, no. 1, p. 012605

We generalize the particle-conserving dynamics method of de las Heras et al. [J. Phys.: Condens. Matter 28, 244024 (2016)] to binary mixtures and apply this to hard rods in one dimension. Considering the case of one species consisting of only one particle enables us to address the tagged-particle dynamics. The time-evolution of the species-labeled density profiles is compared to exact...

Université de Fribourg

Fluid demixing kinetics on spherical geometry: power spectrum and Minkowski functional analysis

Böbel, A ; Bott, Matthias Christian ; Modest, H ; Brader, Joseph M. ; Räth, C

In: New Journal of Physics, 2019, vol. 21, no. 1, p. 013031

Dynamic density functional theory calculations of fluid–fluid demixing on spherical geometries are characterized via their angular power spectrum as well as via the Minkowski functionals (MFs) of their binarized fluid density fields. MFs form a complete set of additive, motion invariant and continuous morphological measures sensitive to nonlinear (spatial) correlations. The temporal...

Université de Fribourg

When labeling L2 users as nativelike or not, consider classification errors

Vanhove, Jan

In: Second Language Research

Researchers commonly estimate the prevalence of nativelikeness among second-language learners by assessing how many of them perform similarly to a sample of native speakers on one or several linguistic tasks. Even when the native (L1) samples and second-language (L2) samples are comparable in terms of age, socio-economic status, educational background and the like, these nativelikeness estimates...

Université de Fribourg

Rapid detection of fosfomycin resistance in Escherichia coli

Nordmann, Patrice ; Poirel, Laurent ; Mueller, Linda

In: Journal of Clinical Microbiology, 2019, vol. 57, no. 1, p. e01531-18

The rapid fosfomycin/Escherichia coli NP test was developed to detect fosfomycin resistance in E. coli isolates. The test is based on glucose metabolization and the detection of bacterial growth in the presence of fosfomycin at 40 µg/ml. Bacterial growth is visually detectable by an orange-to-yellow color change of red phenol, a pH indicator. A total of 100 E. coli isolates, among which 22...

Université de Fribourg

Predicting perceptions of the lexical richness of short French, German, and Portuguese texts using text-based indices

Vanhove, Jan ; Bonvin, Audrey ; Lambelet, Amelia ; Berthele, Raphael

In: Journal of Writing Research, 2019, vol. 10, no. 3, p. 499-525

We investigated how well readers’ perceptions of the lexical richness of short texts can be predicted on the basis of automatically computable indices of the texts’ lexical properties. 3,060 French, German and Portuguese texts (between 9 and 284 words long) written by 8- to 10-year-olds were rated for their lexical richness by between 3 and 18 uninstructed raters, and over 150 indices were...